Showing papers on "Honing published in 1990"

Method and apparatus for fine working or microfinishing

Abstract: The invention relates to a method and an apparatus for fine-working or microfinishing of workpiece surfaces, particularly rotationally-symmetrically moved workpieces (38) with oscillating or rotating tools such as honing stones (18) or fine polishing stones, which are infed against the workpiece (38). Dependent on a measured parameter proportional to the machining force, the tool infeed is controlled such that a continuous workpiece material remove with constant removal speed is achieved. The reaction force is measured at any point in the flux of force to determine the machining force.

Process for honing bores and a honing machine for performing the process

Abstract: Pressure with which working parts of the honing tool are pressed against the bore wall is controlled during machining. The pressure per unit area of the working parts can thereby be kept constant or specifically varied, irrespective of the surface configuration of the bore wall. For this purpose, the honing machine includes a feed mechanism and electronic control device for predetermining the pressure of the working parts against the bore.

Honing tool and method for the surface machining of bore walls

Abstract: A honing tool is used for the surface machining of the cylinder working surfaces of cylinder bores of an internal combustion engine. In order to obtain a uniform plateau texture over the entire surface of the cylinder bore, working elements are provided which can be brought to bear under radial pressure against the bore wall. The working elements are designed as honing rings, which are mounted in the tool like piston rings. The honing rings are arranged roughly coaxially to the longitudinal axis of the honing tool.

Aluminum nitride board and semiconductor module with aluminum nitride board

Abstract: PURPOSE: To greatly improve reliability of contact strength of a semiconductor module by using an aluminum nitride board whose surfaces are different from each other in roughness. CONSTITUTION: One surface 1a of an aluminum nitride board 1 which is a ceramic board consisting of a sintered body of aluminum nitride is processed to have a roughness Ra less than 0.5μm by a method such as of milling process. The other surface 1b is processed to have a roughness Ra of 0.5-2.0μm by honing. COPYRIGHT: (C)1991,JPO&Japio

Oval-bore-machining equipment - has honing bars moved radially by pressure on tapering slides moved axially

Abstract: The equipment machines the surfaces of non-round and particularly oval bores. It comprises a rotary driven spindle with holder accommodating a set of honing bars in axial recesses. It contains passages (12,13) for a medium under pressure acting on\ tapering slides movable in the axial direction so as to generate radial movement of the bars. Control shoes for the bars are moved by tappets (21) sliding axially in a housing (19) rotating with the spindle, and which bear at one end against a stationary cam (17) enclosing the spindle concentrically. USE/ADVANTAGE - Accuracy and fast working speed.

A tool for honing and the like

Abstract: There is described herein a tool for honing or the like, bearing an abrasive sheet (46) which has been applied on the working surface thereof, having previously inter­ posed a resilient material layer (50) therebetween, adapted to provide a slight yielding effect while the tool performs its abrasive action on the surface of the work­ piece. The tool according to this invention may be either a rotating type tool, known in the specific branch of the art as "backing plate" and it is substantially disc-shaped, or an oscillating type tool, i. e. having a substantially rectangular work surface. According to a further feature of the tool of this invention, it comprises a shank (22, 36, 54) for its fastening to a driving apparatus, which is interchangeable, and makes it possible to use the tool with different type apparatuses.

Method and apparatus for honing aircraft blades

Abstract: An apparatus (10) for honing workpieces such as the midspans (108) of jet aircraft engine blades (12) is provided. The apparatus includes a flexibly mounted honing stone (24) which will seat itself on the flat surface of the workpiece to be treated. To provide the necessary flexibility, the honing stone is mounted to a support (20) in such a manner that it is pivotable about at least two axes. It may also be moved in a direction which is substantially orthogonal to the two axes. This latter feature allows the stone to move downwardly as the surface of the work piece is honed. It also allows the honing stone to be moved entirely off the work piece and into a storage position. The apparatus further includes a support (14,16,18) which is specifically designed for holding an aircraft blade in a position such that the wear surfaces of the midspans of such blades are in a substantially horizontal plane. Two clamping assemblies are provided for clamping the root (16) and one of the midspans of a blade (18).

Method and apparatus for machining workpieces on a honing machine

Abstract: A method for machining workpieces, in which the bores to be machined have different nominal sizes, uses a honing tool with a large adjustment range. For each tool with a specified nominal bore size, the tool is set, before machining begins, to a specified starting size, from which the feed takes place. At regular intervals, compensation for the abrasion of the honing surface is carried out by altering a feed starting point. When changing to workpieces of different nominal bore size, an adjustment is likewise made to the compensated starting size.

Wet type honing device

Abstract: PURPOSE:To eliminate the danger of clogging the narrow circuit of the internal part, etc., of an injection gun and a fluid cyclone by burrs, by providing a burr separating device formed by a rotating frame body spreading a filter passing abrasive grains but no passing burrs of large diameter at the one end upper part of an abrasive grain liquid. CONSTITUTION:An abrasive grain liquid is fed to a burr separation device 3 by the driving of a slurry pump at gun injection rest time. The abrasive grain liquid fed into a filter 18 spread on the inner face of a frame body 14 under rotation of the burr separation device 3 is splashed to the circumference by centrifugal force, the liquid and polishing material are filtered and returned to an abrasive grain liquid tank from a discharging cylinder 8 and the burr in large diameter only is left inside the filter 18. Then, the abrasive grain liquid inside a dirty tank is fed to a polishing material processing device by driving a pump, the refined abrasive grain by the filter action of the filter thereof is sticked to the filter, the liquid only is passed through the filter and fed to a clean tank from the discharging pipe of the tank.

Working device for ceramic raw material

Abstract: PURPOSE:To regenerate a polishing surface and eliminate the clogging at early times by installing a honing device for jetting abrasive grains onto the polishing surface of a polishing grindstone. CONSTITUTION:A plurality of raw shaped bodies 5 made of ceramics are continuously polished by a polishing grindstone 8. In this case, abrasive grains 6 are jetted onto the polishing surface of the polishing grindstone 8 from the honing pipe of a horning device 7, and the polishing surface 9 of the polishing grindstone 8 is dressed and regenerated, and clogging is eliminated. Therefore, the raw shaped body 5 can be continuously polished without stopping the working device.

Method and apparatus for external honing of cylindrical workpieces

Abstract: A method and apparatus for external honing of cylindrical workpieces machines the workpiece with the aid of a first external-honing tool. In this case, long strokes are performed. In pauses between long strokes, it is possible to perform short strokes in which a different machining is carried out with the aid of a second, different honing tool, for example a short-stroke machining.

Honing tool and super-high-precision finishing method using said honing tool

Abstract: This invention relates to a honing tool for applying honing finishing to works with high precision and a method of super-high-precision finishing using said honing tool, the honing tool being composed of mainly a pilot part (5), rough grinder part (7), finishing grinder part (10), and correction part (13). The honing tool is fed at high speed while being reciprocated a short distance at a time to apply grind finishing and straightness correction finishing for complete honing. This invention enables increase in grinding work efficiceny, improvement in precision in finishing, and honing finishing providing a high degree of straightness.

Roughing device and grinding wheel for roughing

Abstract: PURPOSE:To increase a grinding efficiency by connecting a slurry feeding part executing a liquid honing by injection to the body to be worked a slurry from the bottom part of a cup shaped grinding wheel to the through-hole formed on the spindle of a work head part. CONSTITUTION:Grinding is executed by a cup shaped grinding wheel 33 in the state of holding on the same chuck the roughing of the back face of a semiconductor wafer 1. This water 1 is then subjected to by injecting a slurry liquid from the injection hole 34 provided on the bottom part inner face of the cup shaped grinding wheel 33. The productivity is thus increased.

Control means of computer control machine tool

Abstract: PURPOSE: To accurately and uniformly machine a workpiece without requiring skills by establishing the operating conditions of a machine tool from input workpiece parameters and stored data to operate machine control devices. CONSTITUTION: A controller 56 for a computer controlled honing machine sets initial operating conditions from workpiece information input from a keyboard 54, including machining dimensions, material data and surface finishing, and lookup table data stored therein. In addition, the rotating speed of a spindle, the load of the spindle, the position of a reciprocating mechanism, the position of a feeding wedge, the temperature 61 of a workpiece and a feeding position 82 detected by a sensor system are input to set the operating conditions and control the operation of a spindle driver 58, a reciprocating unit 60, and a feeding unit 52. In this way, the workpiece can be uniformly, accurately and well-productively machined with minimized knowledges and experiences required for an operator.

Honing device for knife edge of industrial cutting tool

Abstract: PURPOSE:To optionally set the projecting position of a rotary grindstone for a frame and to execute honing of the knife edge of an industrial cutting tool safely and surely by providing in plural pieces a rotary grindstone freely movably at one part of a pair of frames whose meeting angle is made freely adjustable within the range of about 120 deg mutually CONSTITUTION:A pair of frames 1, 16 are turned according to the thickness and angle of a knife edge in the industrial cutting tool to be subjected to honing to adjust the meeting angle thereof The rotary grindstones (11a-11c), (23a, 23b) provided on each frame 1, 16 are advanced and retreated in the respective meeting direction to adjust the projecting position thereof After abutting the knife edge of the industrial cutting tool to the rotary grindstones (11a-11c), (23a, 23b) in this state, the whole body of the frames 1, 16 is slided by reciprocating along the length direction of the cutting tool This knife edge is subjected to honing with rotating the rotary grindstones (11a-11c), (23a, 23b) according to the reciprocating slide of this frame

Honing stone and guide assemblies

Abstract: A honing stone and guide assembly is described comprising an abrasive honing stone bonded to a plastics shoe. The shoe is a snap fit on the platform of a stone holder. A similar plastic snap-on honing guide fits a platform of a guide holder.

Dressing device for honing stick

Abstract: PURPOSE:To prevent the angle portions of a honing stick from breaking off by forming the shaping face of a dresser as one with a radius of curvature smaller than that of the inner wall surface of a subject to be processed, which shaping face shapes the cutting face of the honing stick by means of its movement relative to the stick, and using the dresser to shape the honing stick and also to perform dressing work CONSTITUTION:In processing the inner wall surface of a subject 1 (cylinder) to be processed made of hyper-eutectic aluminum alloy, a plurality of bar-shaped honing sticks 10 each made of an elastic stick are provided, and are each rotated and put in a reciprocating movement in its axial direction as it is expanded to the inner wall surface of the subject 1 to be processed, whereby the inner wall surface 4 is honed The shaping face 17 of a dresser 16 which shapes the cutting face of each honing stick 10 by means of its movement relative to each stick 10 is formed with a radius of curvature smaller than that of the inner wall surface of the subject 1, and the dresser 16 is used to shape each honing stick and also to perform dressing work As a result, the angle portions of each stick 10 are prevented from breaking off during honing process

Ultrasonic vibration honing unit

Abstract: The utility model discloses an ultrasonic vibration grinding unit, which belongs to the grinding technical field; the pitch circle of a bending vibration circle disk is provided with a sound insulating rod; a grinding rod is connected with the sound insulation rod, which causes the grinding rod and the grinding head body not able to vibrate. A relocation mechanism is arranged at the grinding head body, and the relocation mechanism is composed of a ball surface sleeve, a clamping sleeve, a short top bar, and a tight locking nut; the elongated groove of the grinding rod is provided with a rotating screw nut and a cylindrical pin; the inner part of the grinding rod is provided with an oil stone expansion mechanism composed of long top rods, the grinding head is caused to float flexibly, and the oil stone expansion mechanism is operated conveniently. As the grinding rod doesn't vibrate, energy can be saved by 40%; the grinding head has simple structure, and the grinding head can be rigidly connected with the front end of the grinding rod or combined with the grinding rod into integration.

High frequency honing

Abstract: According to a process for machining bores in workpieces, a honing tool provided with an abrasive coating and radially pressed against the wall of the bore carries out simultaneously a rotary and a reciprocal movement. In addition to the reciprocal and rotary movements (2, 3) the honing tool (1, 100) carries out a high frequency, short-hub oscillating movement (31, 32).

Honing tool for production of bores - has hollow body with longitudinal slits permitting expansion of hone by internal movable plug

Abstract: The honing tool consists of a hollow cylindrical body (11) with longitudinal slits (16) which enable the body to be expanded over the cutting length (15). The outside of the body over the cutting length is coated with a honing medium. The expanding mechanism consists of a plug (22) with a tapered bore (26) into which fits a rod (23) with a matching tapered end. Movement of the plug determines where expansion shall occur and movement of the rod with respect to plug the amount of expansion. ADVANTAGE - Flexibility of adjustment of honing action.

Honing process of cylinder

Abstract: PURPOSE:To reduce deformation due to thermal expansion during processing of a cylinder hole, and to perform the process with good accuracy by performing grinding process of a cylinder by a honing grinding stone, letting a fluid cooling medium pass in a tube passage of a cylinder block CONSTITUTION:During the grinding of a cylinder hole 6 by a honing grinding stone 9, cooling water in a tank 12 is circulated and supplied into a water jacket 7 which is formed in a cylinder block 5 to be ground, by a pump 13 of a circulation device 11 The block 5 is sufficiently cooled thereby, so as to reduce frictional heat caused by the grinding process Deformation due to thermal expansion is reduced, and the cylinder hole 6 of the cylinder block 5 is ground and processed with a high roundness

Jet structure at surface processing stage

Abstract: PURPOSE:To execute liquid honing and coating process in the same spraying room and to increase the quality of a coating part by assembling a pressure jetting mechanism by the pump of a chemical, etc. and a jetting mechanism by a compressed air in the same spray room. CONSTITUTION:The chemical 8 located inside a process tank 14 is fed to a riser pipe 2 inside a spray room 9 via a conduit 1 by a pump 10 and this chemical is jetted toward the body to be processed by a nozzle 3 to execute coating process. The mixed slurry of the abrasive particle collected by the separation recovery means 7 of the abrasive particle and the chemical is led to a grinding off nozzle 6 by passing a conduit 5 by a pump 15, compressed by an air compressor 11, jetted into the spray room 9 together with the air passed through a conduit 4 and the oxidized scale of the body to be processed is subjected to liquid honing processing.

Ultrasonic vibrating honing device

Abstract: The utility model discloses an ultrasonic vibrating grinding device, which belongs to the grinding technical field; one end of a grinding bar is provided with a circular disk, and the circular disk is fixed to a water jacket through a transition jacket, which makes the grinding bar and a grinding head body not vibrate. A relocation mechanism is arranged at the grinding head, and an oil stone expansion mechanism is arranged at the grinding bar; therefore, the grinding head can float flexibly, and the oil stone expansion mechanism is conveniently to be operated. As the grinding bar doesn't vibrate, energy can be saved by 40%; the grinding head has simple structure, and the grinding head can be rigid connected with the front end of the grinding bar or combined with the front end of the grinding bar into integration.

Influence of Electrochemical Honing Methods on Load Capacity of Surfaces

Abstract: Combined electrochemical machining (ECM) with abrasive honing (HS) in a process of electrochemical honing (ECH) provides new opportunities in this kind of surface treatment. This paper deals with the experimental results pertaining to grindability and wear of surfaces treated by electrochemical honing in comparison with the surface treated by conventional honing methods. The microgeometry of electrochemically treated surfaces revealed that surface details differ considerably in comparison with the surface machined by grinding itself.

Method and machine for honing bores in workpieces

Abstract: Method and machine for lapping bores in workpieces, the bores being subjected successively to a roughing out by lapping for expansion and to a finishing by progressive lapping. The machine comprises two parallel roughing-out lines (2, 3), each having an expansion-lapping unit (12, 15) with a spindle (13, 16), a finishing line (4) comprising a progressive-lapping unit (18), for example with three spindles (19, 20, 21), and independent conveyors (5, 6, 7, 8, 10, 11).

Coating throw-away tip for threading

Abstract: PURPOSE:To obtain a preferable cutting surface without the separation of a coating layer so as to prolong the service life by a method wherein the honing length of a flank is set to be larger than that of a rake face, that is, the former is 0.02 to 0.15mm and the latter is 0.01 to 0.10mm. CONSTITUTION:A base material 10 is coated with a coating layer 11 of TiN or the like and the honing length 13 of a flank face 12 and the honing length 15 of a rake face 14 are set at 0.02 to 0.15mm and 0.01 to 0.10mm, respectively, thus suppressing chuttering of a tool at the minimum. Further, the honing length 13 is set to be larger than the honing length 15 so that, in the cutting operation, the force F is applied from the outside not only on the coating layer 11 but also on the whole cutting edge containing the base material 10, thus preventing micro-chipping and the micro-separation of the coating layer 10. Accordingly, it is possible to perform a stable cutting operation for a long period and thus obtain the preferable cutting surface without any streak on the surface of the workpiece.