Showing papers on "Honing published in 1981"

Process of remanufacturing pump cylinder liners

Abstract: A process of remanufacturing drilling fluid pump cylinder liners to increase the liner working life and to improve the same involving the steps of: procuring a used liner having a hard metal alloy inner layer from a pump cylinder, and removing portions of the interior metal surface so as to form an enlarged diameter, accurately dimensioned cylindrical surface in the liner. The remanufactured liner is then supplied for use with a specially manufactured piston having an enlarged diameter. Sequential remanufacturing steps can be carried out following several pumping and use cycles so that an orginal liner can be remanufactured multiple times. Prior to the procuring step, the worn liner can be checked while it is retained in the pump cylinder to determine whether extraction is necessary. If desired, the liner can be cleaned by a number of procedures and the outer diameter and configuration checked and, if necessary, resurfaced to restore the original outer surface dimensions. The metal removing step is carried out by honing or by internal grinding.

Self-controlled honing machine

Abstract: To insure that cylindrical bores, and particularly blind bores (8) in a workpiece (9) are truly cylindrical, or of predetermined geometry even in the region adjacent the bottom of the blind bores, a honing blade carrier (4) has a set of long honing blades (5, 5a) of about the length of the bore and a set of short honing blades (6, 6a) located adjacent the bottom of the bore on the tool, with the short honing blades being independently adjustable; sensing elements (25, 26, 27) are integrated with the tool carrier (4) to sense the dimension of the bore at various levels or planes (A, B, C), the output signal from the plane (C) of the bottom of the bore being processed in a controlled channel (32) to adjust, individually, the honing pressure exerted by the short blades, in relation to tool feed, and hone the bottom of the bore to the appropriate size, as determined, for example, by a sample standard (28) having a sensing plane (D) which can be sensed by the same sensing elements as those which sense the bore, upon withdrawal of the honing tool carrier through the standard (28).

Gear burnishing and honing machine

Abstract: A gear finishing machine is provided which utilizes a driven rotary finishing gear and two idler finishing gears. In addition a reciprocating oscillatory mechanism that employs leaf springs as the coupling member, changes rotary into reciprocating motion, which serves to oscillate the workpiece gear across the finishing gears. The machine is capable of either burnishing or honing the workpiece gear according to the ratio of the rotary to sliding velocity of the workpiece gear relative to the finishing gears, duty cycle, and loading pressures. Sensors are utilized which detect undersize and oversize gears, the withdrawing of the driven burnishing gear to the correct location to eject the workpiece gear and the presence of gears in the input and output chute which serve as control signals for the machine.

The influence of grit size and stone pressure on honing

Abstract: The internal honing of a steel workpiece (080 M 40) was investigated using three different grit sizes and a range of stone pressures. Metal removal rate, stone wear and surface finish were recorded. The results show that changes in stone pressure have a significant influence on the metal removal rate and the stone wear. It was also found that the surface finish of the workpiece was largely dependent on the grit size and independent of the stone pressure

Honing head for high-speed operation

Abstract: A honing head comprises a holder having a plurality of radial guide slots angularly spaced from each other and an axial hole, a rough-finishing cone shaft and a finishing cone shaft or a single cone shaft axially slidably received in the hole, and a plurality of rough-finishing and finishing honing stone supports alternately disposed in the guide slots for radial movement therein. The honing stone supports have axially spaced legs having inclined cam surfaces held in abutment with tapered portions of the cone shafts. The honing stone supports are connected to the cone shafts by connectors having one ends fixed to the honing stone supports and second ends slidably received in grooves defined in the cone shafts or the supports and having portions inclined with respect to the axes of the cone shafts in the same direction and at the same angle as the inclination of the tapered portions. Thus, axial movement of the cone shafts causes the honing stone supports to be forcibly displaced radially into or out of the guide slots. The holder includes reinforcement members mounted in the guide slots which members serve to give the holder a required degree of mechanical strength and rigidity for stabilizing the honing stone supports during honing operation and preventing a boring tool attached to the holder from being vibrated during boring operation.

Power stroking honing machine and control apparatus

Abstract: A beam stroker honing machine is controlled to provide a vertical stroke by means of a series of non-contacting sensors. The sensors are a plurality of reed switches which sense the position of a hydraulic cylinder which moves the honing beam up and down. The switches are operated by a magnetic piston associated with the cylinder and by selecting a switch the length of the stroke can be changed during machine operation. The honing machine also provides a power dwell operation which allows the honing tool to remain and reciprocate over a small distance at the bottom of the cylinder being honed for selectable period of time. After power dwell operation the honing machine is returned to its normal vertical stroke selected as above described.

Grinding or honing element - contains corundum shaped into platelets sharp granular abrasive and organic or inorganic bonding agent

Abstract: The grinding or honing element comprises a corundum abrasive, an organic or inorganic bonding agent and a filler, pref. with abrasive properties. It contains two abrasive components i.e. corundum in the form of platelets (2) and a sharp-edged granular abrasive (3). The ratio of platelet dia. to grain dia. may be between 1:1 and 5:1 pref. 2:1 or in another case may be between 1.1 and 1:10, pref. 1:3. The granular material may consist of corundum or silicon carbide. The platelets and/or grains may be coated pref. with a material having magnetic properties such as magnetite. The platelets may be orientated.

Forming method for bore surface of cylinder block for internal combustion engine

Abstract: PURPOSE:To prevent the damage of the sliding section of a piston by machining the bore surface of a cylinder block made of a high Si-Al alloy, etching it, honing it and finishing it. CONSTITUTION:The bore surface 2 of a cylinder block 1 integrally casted by high Si-Al alloy is bored, roller varnished and mirror-finished. The bore surface 2 is etched chemically by a mixed acid liquid, and hard Si particles 11 are deposited to the surface of an Al alloy matrisc 12 in approximately 2-5mu. The bore surface is honed for approximately ten sec. by means of a grindstone 23 elastically mounted to the outer circumference of a grindstone holder 21. Accordingly, the damage of the sliding section of the piston can be prevented because the angular sections 14 of the Si particles 11 are rounded and smoothed through the finishing machining of the bore surface 2.

Working of cylinder bore for internal combustion engine

Abstract: PURPOSE:To prevent the deformation in roundness when an real cylinder head is mounted by roundness honing of a cylinder bore employing a head model. CONSTITUTION:After the boring of cylinders 2A-2D, a head model 3 is clamped securely on the top of a cylinder block 1 through a head bolt 9. Under such a condition, honing is inserted through holes 6A-6D of the head nodel 3 to hone to cylinder bore. After complete honing of all cylinders 2A-2D, the head model 3 is removed and instead a real cylinder head is likewise securely clamped thereon through the head bolt 9. This can positively prevent the deformation in roundness when the real cylinder is mounted.

Can cap seaming tool

Abstract: PURPOSE:To obtain a can cap seaming tool which consists in finishing the extremely easy-to-wear part of the outside surfaces of seaming rolls etc. to extra high hardness by covering the same with TiC, and which considerably improves abrasion resistance and durability to achieve the improvement in the quality of can containers and their high-speed and large-volume production. CONSTITUTION:At the heardening of the surface of the required part of a can cap seaming tool A, the slip phenomenon between the inside circumferential surfce 1b of a can cap 1 and the easiest-to-slip part 4a of a seaming chuck 4 is prevented as follows. After the grinding of the surface of these contact parts, the surface is roughed to about 5-15mu by honing etc., after which TiC coating treatment is applied on the rough surface. In addition, annular groove parts 5a, 6a are ground on the respective outside circumference of the primary and secondary seaming rolls 5, 6 at the time of press-fitting the outside circumferential curled edge 1a of the cap 1 and the outside circumferntial flange edge 2a of the can body 2 which have been crowned and superposed. After this grinding, the surface is smoothed by lapping etc., and further the silimar TiC treatmend is applied to allow a 5-20mu pure TiC layer to deposit stably on the smooth surface, whereby the surface is coated.

Honing tool with working element supports - has tool holders accommodating tools of different types

Abstract: The honing tool has a large number of tool holders pressed by a component having ramp faces and sliding axially towards the surface of the work. The tool holders (5,6) accommodate tools (7,8) of different kinds. Those of one kind can be pressed against the surface of the work by the sliding component (2) via a spring member (14). One kind can be honing stones, with tools of another kind between each pair of stones, typically diamond honing strips. The movement can be transmitted to the latter also via a spring member.

Manufacture of circular liquid crystal display cell

Abstract: PURPOSE:To obtain a circular liq. crystal display cell with enhanced hole working accuracy by injecting a liq, crystal into the gap between two glass substrates, sealing them, making a rough hole by a honing method, and grinding it with a cylindrical grinding tool. CONSTITUTION:Common electrode 6 is formed on lower glass substrate 5 by patterning an electrically conductive transparent thin film, and orienting layers are laid on the opposite surfaces of upper glass substrate 2 and substrate 5 so that the orienting directions are made perpendicular to each other. Outer sealing part 7 and inner sealing part 8 are formed by applying low m.p. glass powder in the form of paste by a screen printing method, superposing substrates 2, 5, and carrying out calcination. At this time, slit part 9 for a liq. crystal injection hole is printed so as to leave the hole, and the hole is formed simultaneously. A rough hole is then made in a part inside sealing part 8 by a liq. honing method, and it is ground with a cylindrical tool such as an electrodeposited diamond tip or a carbide tip to form the hole of the liq. crystal display cell.

Apparatus for holding workpieces during honing work

Abstract: An apparatus for holding of workpieces with at least one vertical bore, particularly for holding a connecting rod, for a honing operation. The apparatus includes two workpiece receiving plates between which the workpiece is insertable with horizontal and vertical play. The workpiece receiving plates have an opening for receiving the honing tool. A holding device is provided and is fixable relative to a workpiece receiving plate; vertically the holding device engages the workpiece free of play at a slight engagement pressure. The holding device is freely movable toward the workpiece in a first direction, and is immovable in the opposite direction. The honing device comprises at least one angle lever, which is tiltable or pivotally journalled relative to a workpiece receiving plate, has one arm engaging against the workpiece, and has the other arm connected with a device which restrains the angle lever in the release or loosening direction.

Grinding wheel cutting controller for honing machine

Abstract: PURPOSE:To control the extended velocity of a grinding wheel by converting the cutting resistance of the griding wheel of a honing machine into electrical signals and controlling the velocity of revolution of a drive source which extends the grinding wheel in accordance with the signals CONSTITUTION:A feed rod 13 which is prevented from revolving by a guide pin 15 which is fit in the guide groove 16 of the side surface is screwed in the external thread at the center of a body of revolution 9 which is driven by a pulse motor 2 and a grinding wheel extended rod 23 and the same cone 26 are mounted at the lower end of the feed rod 13 through a piezoelectric conversion element 25 When the pulse motor 2 first performs its high speed operation, both the feed rod 13 and the grinding wheel extended rod 23 reduce their speed quickly As a result, a grinding wheel 27 is also extended quickly The cutting resistance of the grinding wheel 27 which revolves by another drive source increases and the pressure applied to the piezoelectric conversion element 25 and its output signals are also increased When the output signals exceed their preset point, the pulse motor 2 is switched into the low speed revolution by a control means 29

Honing stone holder

Abstract: PURPOSE:To increase the life of a honing stone holder used for honing the inner surface of the plunger barrel of a fuel pump or the like by forming the guide parts of the honing stone holder by the electrical deposition process using diamond or borazon grains. CONSTITUTION:Guides 4 provided on the peripheral surfaces at the side face hole 1a in the axial direction of a holder body 1 through which a honing stone unit is to be projected and at an opposite side face hole 6a are formed by electrically adhering diamond grains 5 in the state buried in a plated nickel layer 7 formed by the electrodeposition of nickel. By so doing, regeneration of the guide parts 4 by applying electrodeposition again becomes possible when they are worn, and since there is no such problem as abrasion in the conventional chromium plating or thermal distortion by the soldering of hard metal chips, the life of the holder can be increased.

Load-carrying Capacity of the HB〓340 (Hardened and Tempered) Gears : 4th Report, Effect of Surface-finishing on Surface Durability

Abstract: In the previous reports, in order to obtain high surface durability of the HB a 340 (hardened and tempered) gears, the authors proposed that the initial tooth surface should be finished as smooth as possible. In this report, surface durability of gears finished by various methods (skiving --- finish-hobbing with carbide tipped hob, honing with screw-type hone, lapping and grinding) are compared with that of hobbed gears by using a power circulating-type gear testing machine. From these results, it is found that the smoother the surface, i) the less the number of pits and the smaller their size, ii) the smaller the rate of increase of pits with repeated contact stress, and iii) the higher the load-carrying capacity. Therefore, the influence of surface roughness on the surface durability is much more clarified, and the effect of various surface finishes can be grasped quantitatively.

Manufacture of elastic surface wave device

Abstract: PURPOSE:To improve characteristics and yield by reducing bad conditions such as camber as much as possible by roughening the 2nd main surface of a wafer and then by etching the wafer before mirror-finishing the 1st main surface where input and output electrodes are to be formed. CONSTITUTION:An LiTaO3 signle crystal is cut into a prescribed wafer. Of this wafer, the 2nd main surface 5 opposing to the 1st main surface 2 where input and output electrodes are to be formed is roughened by manual sliding and honing work. Next, a solution having a 1:2 ratio of HF to HNO3 is used to etch the wafer at the room temperature for 15 minutes and after curvature is removed, electrodes are formed on this wafer to improve the yield while maintaining prescribed excellent characteristics. Namely, provess etching provides better results with regard to removal of camber and prevention of cracking in handling.

Processing method of inner surface of cylinder for internal combustion engine

Abstract: PURPOSE:To improve inner surface processing effect of a cylinder of a compact type engine by reciprocatingly revolving a hone with abrasives around its shaft body on the inner surface of a cylinder after forming a chromium plating layer on the cylinder inner surface. CONSTITUTION:A cylinder 3 is fixed on a supporting frame 21 of a platform 11, and its bottom part presses a holding plate 18 which is moved vertically by a hydraulic cylinder 13. A chromium plating layer of the minimum necessary layer is formed, in advance, on an inner surface of the cylinder 3. A honing machine 1 which is constituted of a main shaft 2, a wedge 7, and an abrasive 10 to be fixed on a periphery of a holder 8 is inserted from the top part of the cylinder 3, and crossed spiral grooves are formed on the surface of the plated layer by reciprocatingly turning the honing machine 1 for internal surface processing.

Descaling method for hot rolled steel plate

Abstract: PURPOSE:To shorten the time required to remove scale on the surface of a hot rolled steel plate by pickling by cold-rolling the plate at a specified reduction ratio and carrying out liq. honing before descaling. CONSTITUTION:Hot rolled steel plate 1 with scale stuck to the surfaces is cold rolled at 10-40% reduction ratio with cold rolling mill 2 to crush and crack the scale. Plate 1 is then passed through liq. honing device 3, where a granular abrasive material is sprayed together with water or the like to remove part of the scale mechanically. The residual scale is removed by dissolution in acid in pickling vessel 4. The resulting steel plate thoroughly free from scale is washed in washing vessel 5 to remove the acid, and it is dried with dryer 6.

Porous grinding tools moulded from mixt. of abrasive grains - of fine silicon carbide and crushed waste glass frit, and baked to obtain vitreous bond between grains

Abstract: The tools consist e.g. of honing stones or grinding wheels, and are obtd. from a mixt. of abrasive grains (I), a glass frit (II), and fine SiC with max. size 320, and pref. of size 400-600; the mixt. is baked to produce a vitreous bond between the grains. The SiC is pref. dark or green, with size 400. The pref. mixt. contains by wt. 100% frit (II), plus 50-200, esp. 100-200% grains (I), and 2-50, esp. 15% SiC. Grains (I) are pref. SiC of size 80-320, and/or high grade corundum of size 80-600. Frit (II) is pref. crushed bottles or windows, or other waste glass. Rapid and simple mfr. of grinding tools, where the fine SiC reacts with the glass frit (II) to form bubbles or pores in the prods.

Holder for honing abrasive stone

Abstract: PURPOSE:To extend the life of a holder for honing abrasive stone by subjecting the holder to an electrodeposition in such a state that diamond abrasive grains are buried in a chromium plating layer at a guide part of the holder. CONSTITUTION:Guide parts 4 are provided on a peripheral face of a main body 1 of holder for honing abrasive stone at points opposite to side faces 1a. Diamond abrasive grains 5 are buried in a chromium plating layer 7 at the guide parts 4. In this state the holder is subjected to an electrodeposition. Although parts of diamond abrasive grains 5 are exposed and function as guides as the chromium plating layer 7 is worn out by the friction between the holder and a work during honing operation, the diamond abrasive grains 5 wouldn't cut and damage the work because they are exposed only at their tops.

Cylinder for internal combustion engine

Abstract: PURPOSE:To reduce the processing time for honing an inner circular surface by cutting several circular channels on the inner circular surface of a skirt part of the lower part of a cylinder. CONSTITUTION:A skirt part 3 of the lower part of a cylinder 1 is connected with a crankcase 4, and has a notch 5. Moreover, several circular channels 7 are formed in an inner circular surface 6 of the skirt part 3, and when the skirt part is processed, these raise the pressure on the surface contacted with a grindstone, and reduce the processing time.