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Showing papers on "Gear shaping published in 2013"


Patent
04 Sep 2013
TL;DR: In this article, the inner gear ring is machined in a two-stage process, which consists of forging forming, rough machining, tempering, fine machining and turning machining.
Abstract: The invention relates to a method for machining an inner gear ring, and belongs to the technical field of machining. The method for machining the inner gear ring solves the problems that in the prior art, the production process of an inner gear ring machining technology is long, the rigidity of an inner gear ring after normalization cannot satisfy the requirement, and the condition of nitriding is high in temperature. The inner gear ring comprises a body 1, a locating hole 2, a mounting hole 3 and a lubricating hole 4. The method for machining the inner gear ring comprises the following steps of forging forming, rough machining, tempering, fine machining, two-step gear shaping, nitriding and turning machining. Machining processes of the inner ring are simple, the inner gear ring which is manufactured is high in rigidity, the rigidity can reach 650-759 HV, an effective rigid layer is deep, the depth can reach 0.40mm, precision is high and anti-abrasion performance is good.

21 citations


Patent
11 Sep 2013
TL;DR: In this paper, an ion sensitive sensor consisting of a silicon oxide layer and a silicon substrate which are vertically stacked, a source electrode and a drain electrode arranged on the silicon oxide layers at an interval, and a graphene layer arranged between the source and the drain electrodes, is described.
Abstract: The invention relates to an ion sensitive sensor comprising a silicon oxide layer and a silicon substrate which are vertically stacked, a source electrode and a drain electrode arranged on the silicon oxide layer at an interval, and a graphene layer arranged on the surface of the silicon oxide layer and between the source electrode and the drain electrode; wherein the graphene layer is respectively connected with a gear shaping part of the source electrode and a gear shaping part of the drain electrode, and the surface layer of the graphene layer is penetrated with metal oxide particles; the ion sensitive sensor also comprises a micro fluidic channel layer which is erected on the gear shaping part of the source electrode and the gear shaping part of the drain electrode, and the gear shaping part of the source electrode and the gear shaping part of the drain electrode are coated with insulating layers; the micro fluidic channel layer is matched with the graphene layer to form a cavity for accommodating an object for measurement, and is opened with through holes; and suspended grid electrodes are inserted into the through holes and extend into the cavity. The ion sensitive sensor has a structure which is similar to a field effect transistor, and has advantages of high flux, high sensitivity, short response time and the like.

17 citations


Patent
25 Dec 2013
TL;DR: In this paper, a gear ring machining process is described, which comprises the following steps of forging, rough turning, tempering, fine turning, gear shaping, fine gear broaching, carburizing, press quenching and shot blasting to obtain a finished product.
Abstract: The invention discloses a gear ring machining process, which comprises the following steps of forging, rough turning, tempering, fine turning, gear shaping, fine gear broaching, carburizing, press quenching and shot blasting to obtain a finished product. According to the gear ring machining process provided by the invention, the product has the advantages of higher surface hardness, high core hardness and deep hardened layer; meanwhile, the machining cost is reduced, and the gear ring size can be ensured.

10 citations


Patent
10 Jul 2013
TL;DR: In this article, a steel-ball-type gear shaping fixture is described, which consists of a fixture body and a cover plate connected on the fixture body through bolts, and a positioning mandrel is fixed on the upper end surface of the cover plate.
Abstract: Disclosed is a steel-ball-type gear shaping fixture. The steel-ball-type gear shaping fixture comprises a fixture body. A cover plate is connected on the fixture body through bolts. A positioning mandrel is fixed on the upper end surface of the cover plate. A barrel-shaped cage is sleeved on the positioning mandrel. A plurality of steel ball fixing holes are arranged on the wall of the barrel-shaped cage. Steel balls are arranged in the steel ball fixing holes. A cage pressing device sequentially penetrates through a through hole on the positioning mandrel, a through hole of the cover plate and a through hole of the fixture body, and presses the cage. A top plate and a hook-shaped pressing plate device are located on the cage pressing device in a step mode, wherein a plurality of lifting pins are arranged on the top plate and are located in a positioning hole of the cover plate, and the lifting pins extend towards the axial barrel end surface of the cage; the hook-shaped pressing plate device comprises a clamping disc and a hook-shaped pressing plate, the clamping disc is provided with a strip-shaped hole, the tail end of the hook-shaped pressing plate is hinged with the clamping disc through the strip-shaped hole, and the hook-shaped pressing plate extends outsides an opening of the cavity wall of the fixture body and is hinged with the cover plate so as to press the upper end surface of a gear. The steel-ball-type gear shaping fixture is wide in product adaptability, high in positioning precision, reliable to install, easy to use, simple in structure and convenient to manufacture and maintain.

9 citations


Patent
02 Oct 2013
TL;DR: In this article, a machining technology for improving the machining precision of the internal teeth of a carburized and quenched gear was proposed, which comprises pre-machining, heat treatment and finish machining.
Abstract: The invention relates to a machining technology of forms of gear teeth, namely a technology for improving tooth profile machining precision of internal teeth of a carburized and quenched gear. The technology comprises pre-machining, heat treatment and finish machining. According to the technology, a gear shaping cutter is polished properly during pre-machining, common normal line allowance for finish of the internal tooth profile is reserved, further finish machining is carried out on the gear after heat treatment, and therefore the machining precision of the gear is effectively improved, and overall mechanical property of the gear is improved.

6 citations


Journal ArticleDOI
TL;DR: In this article, the authors deduce the corresponding pure rolling mathematical model based on the pure rolling contact theory that cylindrical gear and non-circular gear mesh in the end face, and realize the CAD modeling of noncircular straight and helical gears.
Abstract: Elliptic family gears are commonly used in non-circular gears, which include elliptic gear, high-order gear, elliptic deformed gear and high-order deformed gear, thereinto high-order deformed gear can include the elliptic family gears through adjust its order and deformed coefficient. Because non-circular gear has different tooth profile in different position of pitch curve and there is difference in the left and right tooth profile of the same gear tooth, thus the CAD modeling of non-circular gear is difficult for these characteristics; but the precise model of non-circular gear has important significance to the realization of numerical control machining, kinematic simulation and relevant mechanical analysis. This paper deduce the corresponding pure rolling mathematical model based on the pure rolling contact theory that cylindrical gear and non-circular gear mesh in the end face, and realize the CAD modeling of non-circular straight and helical gears by letting the cylindrical gear and non-circular gear make solid geometry operation, which is suitable for pitch curve with convex and concave. The non-circular gear shaping methods with equal polar and equal arc length are simulated by setting different discrete polar angles, and the transmission ratio curve and the angular acceleration curve of driven gear are get through the kinematic simulation of gear pair, which realize the transmission performance analysis of elliptic family gear pair. The above research results can be applied to the modeling and kinematic performance analysis of other non-circular gears.

6 citations


Patent
25 Dec 2013
TL;DR: In this article, a machining process for fixed disks of synchronizers is described, which includes the following steps: forging, normalization, rough turning, finish turning, rough plane grinding, gear shaping, carburization and shot blasting.
Abstract: The invention discloses a machining process for fixed disks of synchronizers, which includes the following steps: forging, normalization, rough turning, finish turning, rough plane grinding, gear shaping, carburization, pressure quenching, shot blasting, finish plane grinding so as to finally obtain finished products. The machining process for the fixed disks of the synchronizers, which is provided by the invention, can enhance not only the mechanical strength of the fixed disks of the synchronizers but also the wear resistance and planeness of the fixed disks of the synchronizers, thus prolonging the service lives of the fixed disks.

6 citations



Patent
08 May 2013
TL;DR: A roller screw drive linear actuator is characterized by comprising a screw (1), a screw gear (11), a roller (6), a planetary carrier (4 and 9), a nut (3), an external nut (7), and a lug (15).
Abstract: A roller screw drive linear actuator is characterized by comprising a screw (1), a screw gear (11), a roller (6), planet carriers (4 and 9), a nut (3), an external nut (7) and a lug (15) Pitch and number of internal thread of the nut (3) are equal to those of thread of the screw (1) Lead of the roller (6) is equal to that of the internal thread of the nut (3) The part of the internal thread of the external nut (7), meshing with the thread of the lug (15), is subjected to gear shaping for the left internal thread, and shaped teeth mesh with the external gear of the screw gear (11), while drive ratio of the shaped teeth is equal to that of the whole roller screw drive linear actuator The roller screw drive linear actuator is simple in structure, stable in transmission, small in transmission clearance, high in transmission precision, low in noise, high in dynamic responsiveness and constant in transmission ratio and enables speed closed-loop control and displacement closed-loop control to be simpler

5 citations


Patent
09 Oct 2013
TL;DR: In this article, a multifunctional gear shaping machine for machining an oblique tooth by adopting an outer oblique-tooth gear follow-up guide method is described.
Abstract: The utility model discloses a multifunctional gear shaping machine for machining an oblique tooth by adopting an outer oblique tooth gear follow-up guide method The multifunctional gear shaping machine is mainly characterized by comprising an outer oblique tooth gear follow-up guide additional rotation mechanism capable of achieving the additional rotation motion of a gear shaping cutter The outer oblique tooth gear follow-up guide additional rotation mechanism has the function of inserting the oblique tooth and the helix angle of the inserted oblique tooth can be adjusted at will; and by having a gear rack shaping special-purpose sliding table capable of converting the rotation of a disc worktable of the gear shaping machine to the liner motion of the gear rack shaping special-purpose sliding table, wherein the gear rack shaping special-purpose sliding table has the function of inserting a gear rack When the outer oblique tooth gear follow-up guide additional rotation mechanism is connected, inner and outer oblique wheel gears can be machined When the outer oblique tooth gear follow-up guide additional rotation mechanism is disconnected, inner and outer straight wheel gears can be machined When the gear rack shaping special-purpose sliding table is assembled, the straight wheel gears and oblique wheel gears can be machined

4 citations


Patent
20 Mar 2013
TL;DR: In this article, a gear shaping clamp is described in the utility model, which comprises a bottom plate (1), where a cone is fixedly connected onto the bottom plate, and the outer circumferential surface of the upper end of the cone (2) is a tapered surface.
Abstract: The utility model discloses a gear shaping clamp, which comprises a bottom plate (1), wherein a cone (2) is fixedly connected onto the bottom plate (1), and the outer circumferential surface of the upper end of the cone (2) is a tapered surface; a tapered sleeve (4) is sleeved on the tapered surface of the cone (2), and the inner circumferential surface of the tapered sleeve (4) is a tapered surface; the tapered surface of the tapered sleeve (4) is matched with the tapered surface of the cone (2), and a pressing plate (5) is arranged on the tapered sleeve (4); the lower surface of the pressing plate (5) is tightly pressed on the upper surface of the tapered sleeve (4), and the lower end of the pressing plate (5) is connected with a pull rod (10); and the pull rod (10) penetrates through a central hole of the cone (2), and the lower end of the pull rod (10) extends out of the lower surface of the bottom plate (1). According to the gear shaping clamp provided by the utility model, the cone is combined with the tapered sleeve, and at the same time, a workpiece is positioned by a positioning ring stably and accurately, and the purpose of accurate processing is achieved; and meanwhile, the gear shaping clamp has the characteristics of skillful design, low transformation cost and the like.

Patent
18 Dec 2013
TL;DR: In this paper, a spiral gear shaping cuter shaft mechanism for a gear shaper is described, where a fixed embedded strip fixedly connected with a fixed outer sleeve and an adjusting embedded strip with the position axially adjustable with the fixed outer sleeves are arranged in the fixed inner sleeve.
Abstract: The utility model discloses a spiral gear shaping cuter shaft mechanism for a gear shaper. The spiral gear shaping cuter shaft mechanism comprises a cuter shaft, a spiral guiding guide rail fixed on the cuter shaft and a fixed outer sleeve sleeved outside the spiral guiding guide rail. A fixed embedded strip fixedly connected with the fixed outer sleeve and an adjusting embedded strip with the position axially adjustable with the fixed outer sleeve are arranged in the fixed outer sleeve, the fixed embedded strip is provided with a first spiral surface, the adjusting embedded strip is provided with a second spiral surface, and the spiral guiding guide rail is provided with a third spiral surface in sliding fit with the first spiral surface and a fourth spiral surface in sliding fit with the second spiral surface. According to the spiral gear shaping cuter shaft mechanism for the gear shaper, a spiral angle of the spiral surface for limiting rotary motion of the cuter shaft is equal to a spiral angle of a bevel gear having undergone gear shaping, and the cuter shaft mechanism enables the gear shaper to achieve processing on the bevel gear so as to process spiral gears such as an external bevel gear and an internal bevel gear which are high in processing difficulty.

Patent
02 Oct 2013
TL;DR: In this article, a multi-linkage gear shaping quick positioning tool is presented, which consists of a sliding seat, a positioning rod, and a positioning fixture, which can be used for fixing a multilayer gear on a slotting machine working platform.
Abstract: The invention discloses a multi-linkage gear shaping quick positioning tool. The multi-linkage gear shaping quick positioning tool comprises a sliding seat, a positioning rod which is arranged on the sliding seat and a positioning fixture which is used for fixing a multi-linkage gear on a slotting machine working platform. One end of the positioning rod is provided with an opening which corresponds to the gear in shape, and the other end of the positioning rod is provided with a protrusion which can be inserted into a toothed groove. During use, when a first part is machined, the workpiece is firstly fixed, one end, with the opening, of the positioning rod is clamped on gear teeth, machined to be in a tooth shape, of the gear, the other end, with the protrusion, of the positioning rod is inserted into a tooth groove of a slotting cutter, after the slotting cutter and the gear which is machined to be in the tooth shape are meshed so as to automatically reach a precise angle through positioning of the positioning rod, the slotting cutter is then fixed, the one-to-one corresponding relation between the slotting cutter and machined teeth on the part is established, and when follow-up parts are machined, the positioning rod simply needs to be used for positioning during part fixing. The multi-linkage gear quick positioning tool has the advantages of being high in positioning precision, convenient to operate, suitable for large batch production and the like.

Patent
13 Mar 2013
TL;DR: In this paper, an outer oblique tooth gear follow-up guide additional rotation mechanism was used to solve the defects of the existing oblique inner gear shaping and cutting method and the existing gear shaping machine.
Abstract: The invention relates to the technical field of gear machining equipment manufacturing and mainly provides a new method, and a design theory, a working principle and a structural scheme of a multifunctional gear shaping machine which is designed by adopting the method, aiming at solving the defects of the existing oblique inner gear shaping and cutting method and the existing gear shaping machine. Specifically, the invention relates to a method for shaping and cutting oblique tooth gears, which is characterized in that an outer oblique tooth gear follow-up guide method is adopted, and circumferential feeding motion and additional rotation motion are obtained at the same time when a gear shaping cutter makes reciprocating linear motion to form a helical trajectory which is the same as a follow-up outer oblique tooth gear. The multifunctional gear shaping machine which is designed and manufactured by adopting the method is provided with an outer oblique tooth gear follow-up guide additional rotation mechanism and is equipped with a gear rack shaping special sliding table. When the outer oblique tooth gear follow-up guide additional rotation mechanism is connected, inner and outer oblique tooth gears can be machined; when the outer oblique tooth gear follow-up guide additional rotation mechanism is disconnected, inner and outer straight tooth gears can be machined; and when the gear rack shaping special sliding table is installed, straight tooth gear racks and oblique tooth gear racks can be machined.

Patent
14 Aug 2013
TL;DR: In this paper, the utility model relates to a mechanical fixture, in particular to a fixture tool for carrying out gear shaping machining on gear shafts, which is used for gear shaft machining.
Abstract: The utility model relates to a mechanical fixture, in particular to a fixture tool for carrying out gear shaping machining on gear shafts. The utility model discloses a fixture for gear shaft machining. The fixture for gear shaft machining comprises a fixture body used for being connected with a working platform. A connecting sleeve with an inner taper hole is connected on the fixture body, an expansion sleeve which is used for clamping a gear shaft is arranged inside the connecting sleeve, and the expansion sleeve is provided with an outer conical surface matched with the inner taper hole. The fixture for gear shaft machining further comprises a pushing device which is arranged on the connecting sleeve and used for pushing the expansion sleeve to axially move. The fixture for gear shaft machining has the advantages that the pushing device pushes the expansion sleeve to axially move, the inner taper hole in the connecting sleeve enables the expansion sleeve to contract in a radial mode, and therefore the gear shaft in the expansion sleeve is tightly clamped; and the fixture body is fixed on the working platform, when the fixture for gear shaft machining is used, gear shaping machining can be carried out only with the need of rectifying an excircle, and machining accuracy is ensured.

Patent
12 Jun 2013
TL;DR: In this article, a straight-to-ground gear slicing method without the theoretical tooth errors is presented, in which the front face is a spherical face with the center on the axis of the cutter.
Abstract: The utility model discloses a straight-tooth gear slicing cutter without theoretical tooth errors which is a gear cutter The straight-tooth gear slicing cutter without the theoretical tooth errors comprises a front cutter face, a crest back cutter face, a main back cutter face, a main edge and a crest edge, wherein the front cutter face is a spherical face with the center on the axis of the cutter; the crest back cutter surface is a conical face with a conical crest on the axis of the cutter; the main back cutter face is the side face of cutter teeth and is a curved face which can meet the processing requirements without the theoretical tooth errors; the main edge is the intersecting line of the front cutter face and the main back cutter face, and the crest edge is the intersecting line of the front cutter face and the crest back cutter face By utilizing the spherical face as the front cutter surface, the strength of the cutter is high; by utilizing the curved face which is formed by repeatedly cutting out the main edge of a conjugate gear tooth face structure with the front cutter face as the main back cutter face, the processing precision is greatly improved; and compared with a gear slicing cutter designed on the basis of the design theory of a gear shaping cutter, the straight-tooth gear slicing cutter without the theoretical tooth errors has a larger rake angle and a larger relief angle, thereby improving gear slicing conditions

Patent
21 Aug 2013
TL;DR: In this paper, the tensioning and release of the outer gear ring are realized through tensioning an inner annular face of a tensioning body and an outer cylindrical face of the taper shaft in a wedge-shaped mode.
Abstract: The utility model discloses a gearing shaping tensioning fixture. The gearing shaping tensioning fixture comprises a screw, a taper shaft connected with the lower portion of the screw in a threaded mode and a tensioning sleeve which is sleeved outside the taper shaft. An outer gear ring to be machined is sleeved outside the tensioning sleeve. The tensioning sleeve is formed by a tensioning sleeve body and a tensioning sleeve base which are fixedly connected. The tensioning sleeve body is composed of 2-6 expanding ribs which are fixedly connected and coaxial with the tensioning sleeve base and equal to the tensioning sleeve body in diameter. An inner annular face of the tensioning sleeve body is matched with an outer cylindrical face of the taper shaft in a wedge-shaped mode. The wedge-shaped matching between the taper shaft and the tensioning sleeve is used for realizing tensioning and releasing of the outer gear ring to be machined when the taper shaft moves up and down, wherein the tensioning and the releasing of the outer gear ring are realized through the tensioning sleeve. Therefore, non-interference fit between the outer gear ring to be machined and the gear shaping fixture is guaranteed, end faces of the outer gear ring to be machined are compressed, the influences of gaps and end face run-out on product quality are eliminated, workpiece assembling and gear shaping fixture replacing are convenient, stability and percent of pass of the product quality are improved, and time consumed by auxiliary operations is reduced.

Patent
04 Dec 2013
TL;DR: In this paper, a multi-gear gear-shaping fast locating tool is described, which comprises a sliding base, a locating rod arranged on the sliding base and a locating clamp used for fixing multiple gears on a slotting machine.
Abstract: The utility model discloses a multi-gear gear-shaping fast locating tool which comprises a sliding base, a locating rod arranged on the sliding base and a locating clamp used for fixing multiple gears on a slotting machine workbench. An opening corresponding to the shape of gear teeth is formed in one end of the locating rod, and a protrusion capable of being inserted into a tooth groove is arranged at the other end of the locating rod. When the multi-gear gear-shaping fast locating tool is used, a workpiece is firstly fixed when a first part is machined, the end, with the opening, of the locating rod is made to be clamped on the gear teeth with the tooth shapes, the end, with the protrusion, of the locating rod is inserted into the tooth groove of a slotting cutter, after the precise meshing angle between the slotting cutter and the gears with the tooth shapes is automatically achieved through the locating of the locating rod, the slotting cutter is fixed, the slotting cutter and the teeth machined on the parts are made to build one-to-one corresponding relations, and when subsequent parts are machined, the locating rod is simply used for locating the parts when the parts are fixed. The locating tool has the advantages of being high in locating precision, convenient to operate, suitable for batch production and the like.

Patent
26 Jun 2013
TL;DR: In this article, the utility model discloses a gear-shaping and rivet-turning combination anti-rotate locking unit assembly, which enables a self-locking nut to be fixed on a support through coaction of shaping of a gear and turning of a rivet to prevent the nut from rotating on the support.
Abstract: The utility model discloses a gear-shaping and rivet-turning combination anti-rotate locking unit assembly. The nut assembly enables a nut (1) to be fixed on a support (2) through coaction of shaping of a gear and turning of a rivet to prevent the nut (1) from rotating on the support (2). The nut assembly is capable of preventing the self-locking nut (1) from revolving easily through adoption of the gear-shaping and rivet-turning structure, enabling the maximum launch torque of the nut (1) to reach more than 100 N after shaping of a gear and turning of a rivet to enable the nut (1) and the support (2) to be fixedly connected during use, achieving installation of the nut (1) and the support (2) with high strength, increasing reliability of fastening and connection, enabling the nut (1) hardly to be pushed out of the support (2) even under the condition of bearing large outer force. The gear-shaping and rivet-turning combination anti-rotate locking unit assembly is convenient to use, not prone to loosing during use, reliable in connection, simple in structure, good in processing, capable of simplifying devices, fast to install, interchangeable and worthy of popularization.

Patent
03 Apr 2013
TL;DR: In this article, a machining method for a torque transmission plate of an auxiliary box of the speed changing box is presented, which consists of the steps of precise casting and blanking, heat treatment and tempering, rough turning of two sides.
Abstract: A machining method for a torque transmission plate of a speed changing box belongs to the field of components of an automobile speed changing box and particularly relates to a machining technology for a torque transmission plate of an auxiliary box of the speed changing box. The machining method for the torque transmission plate of the speed changing box comprises the steps of precise casting and blanking, heat treatment and tempering, rough turning of two sides, rough turning of an inner hole, precise turning of two sides, rough grinding of two sides, precise turning of the inner hole, rough boring of a positioning hole, gear shaping, heat treatment and ion nitridation of a spline part, precise grinding of two sides, centering, precise boring of a positioning hole of the spline, lettering, inspection, washing and packaging. The defects of the existing manufacturing technology can be overcome. The qualification rate of torque transmission plate products in mass production through the machining method can reach 99.873 percent, the weight of the precise casting blank is reduced by about 22kg compared with that of a polishing plate, the material is saved, the machining efficiency is increased by about 60 percent, the cost is reduced, and the problems that the traditional torque transmission plate components are complicated in machining procedures, the rejection rate is high and the resource consumption is severe can be solved.

Patent
20 Mar 2013
TL;DR: In this article, a method for confirming a slotting parameter of a numerical control gear shaping machine and a switching control device is presented, based on the material, modulus, tooth number and tooth width of a processed gear.
Abstract: The invention relates to a method for confirming a slotting parameter of a numerical control gear shaping machine and a switching control device. According to the material, modulus, tooth number and tooth width of a processed gear, the following slotting processing parameters of the gear are confirmed: slotting cutter stroke distance (mm/cutter), slotting cutter stroke number (cutter/min), feeding times of a workpiece (one time rough slotting, one time semi-fine slotting and one time fine slotting), feeding amount of the workpiece (feeding amount of the rough and fine slotting being 0.2-0.5mm/cutter and total feeding amount of the rough and fine slotting being 1/2 tooth depth/thickness, 2/5 tooth depth/semi-fine, 1/10 tooth depth/fine), rotating speeds of the slotting cutter and the workpiece (tooth/min), cooling liquid, cooling concentration (%) and cooling flow (liter/min). The purpose of high-quality, safe and high-efficiency processing of the numerical control gear shaping machine is achieved according to the method provided by the invention. The operation is simple and the use is convenient, safe and reliable.

Journal ArticleDOI
TL;DR: In this paper, a finite element model of rolling aluminum foils by two kinds of tooth profile shaping rollers was set up, and results of numerical simulation indicate that the honeycomb semi-cell structures rolled by the conjugate trapezoidal gear shaping rolling rollers are closer to the ideal size than those rolled by traditional trapezoid gear shape rollers.
Abstract: In order to solve the problem of low accuracy of honeycomb semi-cell structures which are rolled by traditional trapezoidal tooth profile gear shaping rollers, conjugate trapezoidal tooth profile gear shaping rollers have been put forward to improve the quality of honeycomb semi-cell structures, basing on the theoretical analysis. Using ANSYS/LS-DYNA, a finite element model of rolling aluminum foils by two kinds of tooth profile shaping rollers was set up. Then results of numerical simulation indicate that the honeycomb semi-cell structures rolled by the conjugate trapezoidal gear shaping rollers are closer to the ideal size than those rolled by the traditional trapezoidal gear shaping rollers.

Patent
25 Dec 2013
TL;DR: In this paper, the gear shaping fixture used for the internal ring gear is used for gear shaping of the internal rings gear, where the compressing blocks are positioned on the ring gear to be shaped in a mode of arc-shaped surface contact or at least six pressing points.
Abstract: The utility model discloses a gear shaping fixture used for an internal ring gear. The gear shaping fixture used for the internal ring gear is used for gear shaping of the internal ring gear. The gear shaping fixture used for the internal ring gear comprises a tray, wherein the tray is provided with internal steps which are matched with the end face and the external circle of a ring gear at the spigot end of the internal ring gear to be shaped; the tray is further provided with compressing blocks which can be compressed and positioned on the end face of the internal ring gear to be shaped in an adjusting mode, and the compressing blocks are positioned on the internal ring gear to be shaped in a mode of arc-shaped surface contact or a mode of point contact of at least six pressing points. The gear shaping is conducted on the internal ring gear to be shaped through the compressing blocks in the mode of compression of six or more points or arc-shaped surface contact compression and clamping, out-of-roundness errors caused by unevenness of stress when the gear shaping is conducted are reduced, and the precision of the ring gear before heat treatment of the internal ring gear can reach level seven.

Patent
20 Nov 2013
TL;DR: In this paper, a gear shaping tool consisting of a body, a joint disc, a connecting disc, positioning disc, an upper cover, a swelling sleeve, and a draw bar is presented.
Abstract: The invention provides a gear shaping tool. The gear shaping tool comprises a body, a joint disc, a connecting disc, a positioning disc, a swelling sleeve, a draw bar and an upper cover. A plurality of body threaded holes are evenly distributed around the center of the body, a plurality of body through holes are distributed in the outer sides of the body threaded holes, and a plurality of body fixing holes are evenly distributed in the side edge of the body. The body is further provided with a plurality of liquid flowing grooves. The joint disc is fixed on the body, the center of the joint disc is provided with a joint disc through hole which shares the same axis with the center of the body, and the draw bar is fixed with the connecting disc. The swelling sleeve is connected to the connecting disc. The positioning disc is provided with a plurality of screw holes and liquid flowing grooves matched with the body, and the positioning disc is installed inside the swelling sleeve and is fixed on the body through a bolt by the way of penetrating the screw holes of the positioning disc. The upper cover is provided with a center through hole and is fixed on the body. The gear shaping tool has the advantages that the above method is used for machining and fixing, workpieces are guaranteed to be accurate in fixing, even in stress and complete in machining, damage on the workpieces is avoided, and resources are saved.

Patent
16 Oct 2013
TL;DR: In this paper, a shaft sleeve internal spline gear shaping clamp is proposed, which comprises a clamp body, a pull rod, a cone body provided with a slant groove and a chuck which is arranged in the cone body and clamps a clamped workpiece tightly.
Abstract: The invention relates to a shaft sleeve internal spline gear shaping clamp which comprises a clamp body, a pull rod, a cone body provided with a slant groove and a chuck which is arranged in the cone body and clamps a clamped workpiece tightly. The cone body is fixedly connected with the clamp body. The pull rod is fixedly connected with the chuck. An inrun matched with the slant groove in the cone body is arranged on the outer side wall of the chuck. An elastic transition sleeve is arranged on a contact face between the chuck and the clamped workpiece. According to the shaft sleeve internal spline gear shaping clamp, positioning datum and technological datum are unified, and an upper datum outer diameter and a lower datum center hole are used for being a common datum to carry out positioning. Clamping precision is high, a supporting point and a cutting point are basically arranged in the same cross section face, supporting rigidity is large, the structure is compact, and efficiency is high. The elastic transmission sleeve is used for shortening the distance between a clamping portion and a gear shaping portion and knife vibration is avoided. Thus, machining quality is ensured.

Journal ArticleDOI
TL;DR: In this paper, a virtual prototype of drive gear transmission system was created by Romax analysis software, and made simulation after establishing some constraint conditions according to the working conditions, and the results showed that all bearings used in the virtual prototype this paper meet the requirements of mechanical performances.
Abstract: As the key system of NC gear shaping machine, the principle property of the drive transmission system have a decisive influence upon a complete machine. The virtual prototype of drive gear transmission system was created by Romax analysis software in this paper, and made simulation after establishing some constraint conditions according to the working conditions. Both ISO 281 and Romax Adjusted are applied to analyze and predict fatigue life of each bearing, then through using the principle of Miner, all the damage percentage were added together under different conditions. The results showed that all bearings used in the virtual prototype of drive gear transmission system meet the requirements of mechanical performances. This study provides theory basis for follow-up design and optimization on NC gear shaping machines drive transmission system.

Patent
13 Feb 2013
TL;DR: In this paper, an oblique tool retracting device of a gear shaping machine is described, which consists of a middle machine body, an upright, a big key, a screw rod, a nut and a flange plate.
Abstract: The invention discloses an oblique tool retracting device of a gear shaping machine; the oblique tool retracting device comprises a middle machine body, an upright, a big key, a screw rod, a nut and a flange plate, wherein the flange plate is fixed on the middle machine body; the nut is fixed at the lower part of the upright; one end of the screw rod penetrates through an inner hole of the flange plate; the other end of the screw rod rotates into a screw hole of the nut; and the big key is fixed on the middle machine body. The oblique tool retracting device of the gear shaping machine, disclosed by the invention, has the advantages as follows: simple structure is obtained; through adjusting the screw rod, the tool can generate relative movement so as to eliminate abnormal situations during machining gears.

Patent
11 Dec 2013
TL;DR: In this paper, the authors proposed a new grinding method for a worm grinding wheel of a raised pitch curve non-circular gear, which is similar to a traditional cylindrical gear worm-wheel grinding.
Abstract: The invention discloses a grinding method for a worm grinding wheel of a raised pitch curve non-circular gear. The method mainly comprises the following steps of trimming of the worm grinding wheel, alignment of the worm grinding wheel and a gear, and track planning of the worm grinding wheel, wherein a worm grinding wheel grind replaces the raised pitch curve non-circular gear processed by a formed grinding wheel generating grinding method based on a gear shaping principle. The worm grinding wheel grind can be used for grinding multiple gears simultaneously, has higher efficiency compared with the formed grinding wheel generating grinding method based on the gear shaping principle which can be used for grinding single gear, and has relatively low cost. Therefore, the grinding method has the characteristics of high processing efficiency and low processing cost, thus providing a new grinding choice for the raised pitch curve non-circular gear. Furthermore, the grinding method for the worm grinding wheel of the raised pitch curve non-circular gear is very similar to a traditional cylindrical gear worm grinding wheel grind, the main difference is the linkage track planning, so that according to the grinding method, a non-circular gear software control module can be easily integrated in a numerical control worm grinding wheel gear grinding machine.

Patent
01 May 2013
TL;DR: In this paper, a straight bevel gear is processed without grinding a tooth root, and a gear shaping tool with a boss cutting edge is used for gear-shaping processing.
Abstract: The invention discloses a method for processing a straight bevel gear without grinding a tooth root. The method comprises the following steps of: (1) roughly processing a gear blank, and establishing a gear-shaping processing foundation; (2) gear-shaping processing: performing uprooting processing on the gear by adopting a gear shaping tool which contains a boss cutting edge, wherein the starting point of uprooting is close to the starting point of meshing, and the uprooting amount on a gear root transition curve is 0-0.2 millimeters larger than the grinding allowance of the gear; (3) performing carburizing heat treatment; (4) finely processing the gear and the foundation; (5) grinding teeth; and (6) checking and warehousing. The method has the beneficial effects that the gear shaping tool which contains the boss cutting edge is used for performing gear-shaping processing for uprooting the straight bevel gear in gear-shaping processing, and the straight bevel gear is subjected to tooth grinding processing, so that smooth switching of a tooth surface and a gear root transition curve is realized, a boss of the gear root transition curve is eliminated, non-grinding processing of the tooth root is realized, a pressure stress surface layer of a gear root thermal treatment surface is kept, smooth switching is realized, and the bending strength of the gear is enhanced.

Patent
07 Aug 2013
TL;DR: In this paper, a method for processing and positioning a shaft extension spline on a gear shaping machine is described, which is high in positioning accuracy, low in manufacturing costs, high in processing efficiency and easy to operate.
Abstract: The invention relates to a method for processing and positioning a shaft extension spline on a gear shaping machine. The operating steps of the method includes: 1) placing a shaft type work piece at the central position of an upper end face of a positioning block; 2) sleeving a lantern ring on an outer cylindrical surface of a contact end of the shaft type work piece and the positioning block from the upper end of the shaft type work piece; 3) rotating the lantern ring to a position where a locking blocking rod and a clamp lifting lever contact with each other in a cross mode; 4) revolving and screwing the locking blocking rod to screw down and fix the lantern ring and the shaft type work piece; 5) utilizing an upper centre and a lower centre to respectively support the upper end and the lower end of the shaft type work piece, wherein the lower centre penetrates through a clamp base seat and the positioning block to support the lower end of the shaft type work piece to limit the displacement of the shaft type work piece, which is perpendicular to the direction of the clamp base seat; and 6) lifting the clamp lifting rod, wherein the clamp lifting rod drives the locking blocking rod, the lantern ring and the shaft type work piece to rotate, and the shaft type work piece completes processing on the gear shaping machine during rotation. The method for processing and positioning the shaft extension spline on the gear shaping machine is high in positioning accuracy, low in manufacturing costs, high in processing efficiency and easy to operate.