Showing papers on "Honing published in 1984"

Super-precision cylindrical machining

Abstract: A study has been made of the theory and techniques of turning precise circular components. The possibility of such high accuracy cylindrical machining was analysed according to the principle of making a precise circle. In the study, a form of chucking-type preciison cylindrical machining was developed by combining an insensitive vibration cutting mechanism - using a main spindle system which features an air bearing - with superposition superfinishing. In the first process, the work is chucked on the main spindle and machined using a continuously and systematically pulsating cutting force. In the second process, the work is finished by a newly developed superposition superfinishing device which features equivalent grades of ultrasonic vibration stone. Key points of the techniques are a torsional vibration mode tool for producing accurate, high amplitude vibration of the cutting point, and a contrivance for making accurate movements of the superposition superfinishing device. Machined roundness of 0.1–0.2 μm and surface roughness of 0.03–0.09 μm R max were obtained with plain carbon steels, stainless steels and hardened steels (HRC 41, 53, 60). It is considered that turning to roundness ≈ 0 , cylindricity ≈ 0 and surface roughness ≈ 0 can be realized by means of this new machining process and its lathe.

Combined machining device for boring and honing

Abstract: PURPOSE:To expand the diameter of a boring tool when the boring tool has worn away during machining process and equalize machining time by connecting a stroke adjusting mechanism with a working shaft to expand and contract the boring and honing tools individually. CONSTITUTION:A boring tool 21, rought and finish honing wheels 31, 41 are fitted on a machining head 4 under the condition of freely expanding and contracting respectively in radial direction. A working shaft which moves axially and expands or contracts the boring tool 21 and honing tools 31, 41 individually is inserted in the machining head 4. A stroke adjusting mechanism for the working shaft is connected with the working shaft so as to vary the amount of expansion and contraction of the boring tool 21. After boring process, a hole is cleaned with an air ejected from a nozzle 501 and its bore is measured with an air micrometer 51. When the bore becomes less than a desired value owing to the worn tool 21, the diameter of the worn tool 21 is enlarged by the amount of wear by means of the adjusting mechanism, and the machining time can be therefore equalized.

Cylinder block of internal-combustion engine

Abstract: PURPOSE:To shorten the time for quenching and secure the roundness at the time of honing by performing laser quenching to the bore surface of a cylinder block in such a procedure as processing spirally up and down throughout the bore CONSTITUTION:A laser beam irradiating device is to apply laser quenching in the form of strings 12 to the surface of the bore 2 of cylinder block 1 made of cast iron with stratified graphite, wherein the string is formed spirally up and down throughout the bore 2 Thereby irradiation of laser beam can be scanned continuously to lead to shortening of the quenching time, as well as uniform provision of quenching in the whole area will ensure that the following honing gives a good roundness and cylindricity

Centerless honing machines having automatic size control

Abstract: Centerless honing machines are described for honing external cylindrical surfaces on a series of workpieces. Each machine comprises a pair of spaced adjacent rotary rollers for supporting and rotating workpieces while also causing them to travel axially along the rollers, at least one honing stone for engaging and honing the workpieces, a fluid pressure operated device for pressing the honing stone against the workpieces, a gaging device for gaging the size of the workpieces and for producing gaging signals, a pressure regulator for supplying fluid pressure to the fluid pressure operated device, and control means operable in response to the gaging signals for adjusting the pressure regulator to increase or decrease the fluid pressure and thereby to increase or decrease the amount of stock removed from the workpieces by the honing stone to achieve closer agreement between the finished size of the workpieces and the desired size.

An Analytical Investigation of the Honing Mechanism

Abstract: The cutting mechanism in the honing operation is analyzed theoretically, assuming that one stick corresponds to a single point tool with a long cutting edge. As a result, an evaluating function to present the overall severity of honing conditions and an equation to calculate the specific cutting force are derived. Moreover, some experiments are carried out to confirm the propriety of these results.

Device for the releasable connection of grinding tools to the shaft of honing machines

Abstract: The invention relates to a device which can be attached to the drive shaft of honing machines or similar machines. The device consists of a disc which is provided with permanent magnets at its periphery, the polar ends of which project slightly beyond the surface of the disc or are coplanar with it in order to come into contact with a mating disc of magnetic material and to hold it in position, which mating disc is fastened to the grinding tool or grinding tools. The connection between these parts, securing them in rotation, is ensured by pins which engage in holes and are both provided on these parts. In addition, to facilitate the separation, the disc and/or the mating disc is provided with notches at its edge in order to permit the separation of the mating disc from the backing disc by means of a suitable tool.

Method for finishing matted surface on a metal-made article for personal ornament

Abstract: The invention provides a means for solving the difficult problem of the deposition of stain in the recesses to cause loss of beautiful appearance on the matted surface of an article for personal ornament made of titanium, zirconium or an alloy thereof formed by honing or barrel finishing. The method comprises the steps of (a) forming a first matted surface with microscopically fine protrusions and recesses on the article by honing or barrel finishing, (b) forming a hardened layer on the matted surface by nitriding, carbonizing, boriding or oxidizing, (c) partially removing the hardened layer covering the protrusions on the matted surface by a first electrolytic or chemical polishing, (d) forming a second matted surface on the article by honing or barrel finishing, and (e) partially removing the surface layer at the protrusions by a second electrolytic or chemical polishing to smoothen the surface leaving a sandy appearance.

Method of manufacturing a trueing tool and parts to be used for implementation of the method

Abstract: A method of manufacturing a trueing tool is involved. The latter is used for the true to shape, fine machining of a fine machining tool which is used for its part for the fine machining of workpieces. The trueing tool, in particular a trueing gear wheel for the fine machining of a honing gear wheel, has a core which supports a grinding layer constituting the working surface and containing abrasive grits. In order to increase the shape accuracy of the trueing tool, a form (mould) is used during its manufacture, this form (mould) having a formed surface which is complementary to the working surface of the trueing tool to be manufactured and represents therefore a negative of the working surface. The grinding layer is deposited or formed thereon, whereupon the finished trueing tool is removed from the form (mould) when a solid bond between the core and the side of the grinding layer opposite the working surface has been achieved.

Hone for gerotor stators, and honing method

Abstract: An apparatus and method for honing cylindrical bores adjacent to a larger cavity or bore is disclosed. The apparatus comprises a set of expandable abrasive-coated frustro-conical sleeves mounted on rotating shafts, one for each cylindrical bore, which circumferentially surround, and are supported by, a rotating inner supporting member. The sleeves and supporting member are moved through the bore and larger cavity in a direction along their axis of rotation, and in so doing, the sleeves contact the bore walls to impart a honing action. A means for precisely adjusting the final honing diameter of the sleeves is provided, as well as means for adjusting the distance of the sleeves from the center of the larger cavity. By adjusting the sleeves at successively closer positions to a desired final bore, the bore can be honed with great accuracy.

A method for feeding a honing tool, and apparatus for carrying out the method

Abstract: not available for EP0163983Abstract of corresponding document: US4679357A method of displacing or feeding the honing tool of a honing machine during long stroke honing when machining workpiece bores. Rapid displacement feeding or and subsequent machining displacement or stock removal feeding are effected with only a single motor employed in common for different operation, which is controlled in such a way that during rapid feeding or displacement it operates at high speed and low limiting angular momentum or torque limit. Due to the low angular momentum or torque limit during rapid displacement, the speed is rapidly reduced when the honing stones come to rest agianst the bore wall. The control mechanism thereupon reverses the single motor, returns the honing stones by a small amount, and changes over to the machining or stock removal feeding process, which is accomplished at low motor speed and high limiting angular momentum. When a pretermined finished size has been achieved, a displacement control mechanism returns the honing tool to its starting position. The invention covers a method for automatic displacement control of a honing machine, as well as an apparatus for carrying out this method.

Electromagnetic connection device

Abstract: PURPOSE:To stabilize the torque due to elimination of any camber as well as increase in hardness of the friction surface by applying processes such as liquid honing, shot peening and the like to the friction surface of at least either one of rotor or armature CONSTITUTION:Such processes as liquid honing, shot peening and the like are applied to friction surfaces 3b, 5c of a rotor 3 and an armature 5 to effect hardening work Namely, when honing process and the like are applied, traces due to lathe machining on the friction surfaces 3b, 5c are eliminated and said surfaces not only turn aventurine-like but also hardened due to hardening work Thus, frictional torque is enhanced, and fine tears and the like are prevented at the time of connection, and further stabilized transmission torque can be obtained Besides the above, any chamber produced on sides of a rib of the armature 5 due to processing disappears, and stable torque can be obtained

Screwed hone for finishing process of gear

Abstract: PURPOSE:To shorten the time for grinding by increasing the contact area of the screwed surface of a hone with each tooth surface of a gear to be processed, and to enhance the life by preventing thereby breakage of the thread CONSTITUTION:Grinding layer 25 and an abrasive supporting layer 23 of a screwed hone are made of a material with elasticity, where the grinding layer 25 shall be softer than the supporting layer 23 Each abrasive grain protruding from grinding layer 25 during grinding is embedded in a binder, and the grinding layer 25 itself deflects while deforming the supporting layer 23 concavely according to the configuration of the tooth surface B Therefore the contact area of the screwed surface A of the hone with each tooth surface B of a gear to be processed W is enlarged, and honing of the gear W can be made with high precision for a short time

A grinding, honing or abrading body

Abstract: A grinding, honing or abrading stone or stick comprises a matrix of cured or fused adhesive binding material, hard abrasive particles held in place throughout the matrix, and reinforcing material also held in place throughout the matrix. A stone or stick of greater strength and reduced brittleness is thereby formed.

Analyses of thermal deformation of workpiece in honing process: 3rd report. Numerical analyses of cylindrical and non-cylindrical workpieces

Abstract: Analyse des deformations thermiques des pieces au cours du rodage. Analyse numerique pour des pieces cylindriques et non cylindriques

Honing head construction

Abstract: A honing mandrel having six circumferentially spaced work engaging members thereon including a body portion with a pinion gear rotatably mounted therein, a pair of opposed honing assemblies and a pair of opposed guide assemblies each having rack gear members extendable into transverse body bores for cooperating with the pinion gear, each of the honing assemblies having two circumferentially spaced work engaging honing members thereon, and each of the guide assemblies having a single work engaging guide member thereon, the honing members on the honing assemblies moving on chords of a cylindrical work surface during expansion and contraction thereof, and the guide members on the guide assemblies in one embodiment moving on chords of the work surface during expansion and contraction thereof and in another embodiment moving on or adjacent to a diameter of the work surface during expansion and contraction thereof. In the embodiment where the guide members move on or adjacent to a diameter of the work surface the invention further includes modifying the rack gear teeth on the rack gears associated with the honing assemblies relative to the rack gear teeth on the rack gears associated with the guide members to maintain the honing members and the guide members on the same cylindrical surface during expansion and contraction thereof.

Device for holding workpieces, especially cogs, for the purposes of honing the central axial bore

Abstract: The invention relates to a device for holding workpieces, especially cogs 3, for the purposes of honing a central axial bore 6, consisting of a workpiece support 1 mounted floatably, which may be loaded and unloaded on one side. In order to achieve a high machining precision, it is necessary for the cog 3 to reliably transmit, to the workpiece support 1, the rotational torques which are produced during machining, without it tilting or changing position with respect to the honing tool 2. To this end, according to the invention, provision is made for placing levers 13, 14 mounted pivotably on the workpiece support 1, these being fitted with tooth-shaped ends 15, 16 which, being diametrically opposed, penetrate tooth gaps in the workpiece. In the engagement position, the levers 13, 14 press on a stop 17, 18 in the rotational direction of machining (arrow 19), whilst in the opposite direction, they may pivot at least as far as a second position where they are out of engagement.

Cleaning process of metal die

Abstract: PURPOSE:To remove the surface stain while improving the workability of a metal die by a method wherein fine grains are jetted from a honing nozzle at high pressure upon the surface of a metal die. CONSTITUTION:The jet pressure from a honing nozzle and the material of fine grains are selected not to roughen the metal die material and the hard chrome plating of the metal die surface. As for the fine grains, an indefinitely shaped or crystalline silica, glass beads, walnut powder, thermosetting plastic ball and the like are used together with one another at the same time. In such a constitution, any film of melamine base thermosetting resin conventionally utilized for preventing the stain of applicable epoxy resin may be entirely unnecessary while producing no poisonous gas at all making operation safe and simple as well as cleaning over-all surface evenly.

Optimum cutting feed method of honing

Abstract: PURPOSE: To continually finish in fixed accuracy a surface to be machined further in a fixed machining time, by detecting a motor current in an electric motor, which rotates a wheel, and controlling, so that this current always holds a predetermined value, the pressing pressure of the wheel with a value of the motor current being negative feedback controlled. CONSTITUTION: A cutting speed instruction 1, being compared with a motor current driving a wheel, is input to a pressure controller 2, and its output drives an oil pressure control valve 3. This pressure of oil, operating a wheel spreading cylinder 4 generating pressing force of the wheel to a work, performs honing 5. And a required cutting speed 6 is generated. Here a motor current detecting device 7 detects the motor current to be negative feedback controlled so that the cutting speed 6 may trace a predetermined curve. Consequently, a surface to be machined comes to continually provide fixed finishing accuracy and roughness, while a fixed machining time can be obtained. COPYRIGHT: (C)1986,JPO&Japio

Manufacture of endmills with tip strengthened

Abstract: PURPOSE:To have precision grinding of the rake face and flank of a cutting edge simultaneously in a single stage in processing, by using a disc-shaped brush wheel, which is constituted with brushes including grinder element as a honing tool. CONSTITUTION:When a brush wheel rotates, the tip of a brush filament 5 is put in contact from the rake face 2 side, and the filament 5 deflects for abrasion of the tip of said rake face 2 with abrasive grains at the foremost part of filament. After passage of the foremost part, said deflection of the filament 5 returns to the straight state, so that the tip of filament 5 causes abrasion also at the flask 3 side while passing there. The filament 5 is provided with a smooth honing surface, which includes a number of abrasive grains so as to cause abrasion of the tip of cutting edge. In the case of a twisted cutter, the tangential line of the spiral curve at its portion for honing shall be in parallel with the wheel shaft, while in the case of a straight edge the straight line of the tip of cutting edge in parallel with the wheel shaft. Thereby manufacture of endmills can be provided in good efficiency and with high economical performance.

Apparatus for holding workpieces in particular gear wheels for honing the central axial bore

Abstract: An apparatus for holding workpieces, in particular gear wheels (3) for honing a central axial bore (6), comprises a workpiece holder (1) mounted to float and able to be loaded and unloaded from one side (5) In order to achieve high machining accuracy, the gear wheel (3) must transmit the torque during machining reliably to the workpiece holder (1), without tilting or changing its position with regard to the honing tool (2) For this purpose, there are provided levers (13, 14) with tooth-shaped ends (15,16) pivotally mounted on the workpiece holder (1) The ends (15, 16) of the levers, which are approximately diametrically opposed to each other, engage in tooth gaps in the workpiece (3) In the position of engagement in the machining direction of rotation (arrow 19), the levers (13, 14) bear against stops (17, 18), whereas in the opposite direction, they are able to swing at least into a position of non-engagement with the workpiece 3

Liquid honing apparatus

Abstract: PURPOSE:To obtain a liquid honing apparatus excellent in the accuracy of purification which can separately recover a more highly purified liquid than that in a conventional one, by connecting an apparatus for the treatment of an overflowing liquid having an oil skimmer, a sludge conveyer and a means for recovering a supernatant liquid and a liquid cyclone as purifiers in series between tanks for a liquid suspension of abrasive grain and a tank for purified liquid. CONSTITUTION:In this liquid honing apparatus, an apparatus 5 for the treatment of an overflowing liquid equipped with an oil skimmer 11 and a means 14 for recovering a supernatant liquid, and a liquid cyclone 23 are connected in series. Light fats or oils, and suspended matter are removed from a liquid suspension of abrasive grain used for honing by the oil skimmer 11, and the reusable abrasive grain are separated in a chamber for secondary treatment and recovered in a tank 2 for the abrasive grain suspension by a sludge conveyer 13. On the other hand, fine unreusable abrasive grain and ground chips are separated and removed by the liquid cyclone 23. Consequently, a more highly purified liquid as compared with that in a conventional apparatus can be separated and recovered. In addition, the excellent honing apparatus of good efficiency which can automatically purify and recover the liquid without the necessity of substantial maintenance in the separating and recovering step can be offered.

Method for liquid honing

Abstract: PURPOSE:To save the energy loss of highly pressurized water in accelerating an abrasive cleaning material, by moving a nozzle defice provided alternately with nozzles of abrasive cleaning slurry and nozzles of highly pressurized water, at the time of bringing the water into collision with the slurry. CONSTITUTION:A nozzle device 1 consists of nozzles 2 of abrasive cleaning slurry 4 and nozzles 3 of highly pressurized water 5, those of which are alternately disposed so that each slurry 4 is sandwiched between the water 5. In case of grinding a metallic plate with the device 1, the device 1 is rocked in the direction of an arrangement of the nozzles 2 and 3. Thus the locus caused by the injections of the slurry 4 and the water 5 is formed into a meandering shape, and the whole quantity of the water 5 collides with the slurry 4 to accelerate effectively the slurry 4. Accordingly, the energy loss of the water 5 is reduced.

Honing method and honing machine

Abstract: PURPOSE:To make it possible to expect to have a precise right angle between a work reference surface set on a table and a machined hole surface to be hone, of a work, by providing such an arrangement that the work is rotated in the direction opposite to the rotational direction of a honing head. CONSTITUTION:In a honing machine, a table rotating shaft 1 rotates about the axis A of the rotating center of a honing head 2 and the rotating center B of the shaft aligned with the axis A, right below the honing head 2. Further, a work rotating/working table 3 is secured to the top of the shaft 1 at a right angle to the rotating center B of the shaft 1. Further, a work C is set on the surface D of the work rotating/working table with its reference surface E being contacted therewith. Then, in the case of that a machined hole is honed by inserting a honing grind stone thereinto, the center of the honing grind stone is held by itself while the machined hole surface 5 is honed, thereby the accuracy of right angle with respect to the reference surface E for the surface 5 of the work C may be enhanced.

Descaling method of steel strip

Abstract: PURPOSE:To descale a steel strip with min. energy and good efficiency by measuring the degree of descaling between a liquid honing device and a pickling tank, controlling the degree of descaling in the liquid honing to be constant and controlling the traveling speed of the steel strip in the pickling tank from the measured value thereof. CONSTITUTION:A detector 16 for degree of descaling is provided between a liquid honing device 7 and a pickling tank 8. Said detector measures the degree of descaling on the surface of a steel strip 1A by liquid honing and outputs the measurement signal to a discrimination device 18 for degree of descaling. The device 18 compares the degree of descaling with a set value, and outputs the result of the discrimination to a control device 17, from which a control signal is oututted to a setter 19 for honing conditions thereby controlling the degree of scaling by the device 7 to be constant. The device 17 outputs further the control signal to line speed setters 20, 21 in accordance with the signal of the device 18 to drive and control bridle rolls 12, 13 on the inlet and outlet sides of the descaling lines with motors 12A, 12B, so that the immersion time of the strip 1A in the tank 8 is controlled to a prescribed value.

Manufacture of electrophotographic photosensitive body

Abstract: PURPOSE:To improve transferability of toner, separability of paper, and cleanability by roughening the surface of a photosensitive layer made of an Se type photoconductor deposited on a conductive substrate of an aluminum cylinder or the like by the liquid honing method to a specified surface roughness. CONSTITUTION:An Se type photoconductive layer made of Se-As alloy or the like is deposited on a conductive substrate of an aluminum cylinder, and the surface of this photosensitive layer is roughened to <=40mum surface roughness, preferably to the range of 0.1-1.0mum by the liquid honing method. Since the specularly finished surface of the photosensitive layer formed on the substrate is roughened by the liquid honing method, the conditions of the surface roughness of the conductive substrate and vapor deposition, etc. need not be set delicately. Transferability of toner, separability of paper, and cleanability are improved without impairing the photoconductive characteristics of the photosensitive layer. Any defect of an image, such as spots or white streaks, due to working defects of the surface is not found on the image.

Device for honing small parts

Abstract: A device for honing small parts contains a honing tool (11) on which a guide bush (16) is mounted. Mounted on the outside of the guide bush (16) is a guide sleeve (17) which at the same time serves as a clamping device for the parts (25) to be honed. The guide sleeve (17) is moved in the longitudinal direction of the honing spindle (11) by hand or by means of a lifting arm. The mounting of the guide sleeve (17) on the honing tool (11) results in an improvement in the machining accuracy, in particular in the squareness of the bores to be honed relative to their clamping surface at the workpieces (25).