Showing papers on "Honing published in 1983"

Some theoretical aspects of a practical measurement problem in plateau honing

Abstract: Ways of reducing the run-in period and the oil consumption of engines are being investigated intensively. One possible solution is that of making the cylinder liners in such a way that the modification of local geometry during running-in is kept to a minimum. Current technology has developed a modified honing process which attempts to reproduce the run-in texture. However, there are serious problems in measuring these surfaces which is resulting in disputes between machine tool and car manufacturers. This paper analyses the nature and ex tent of a major problem and quantifies it, thereby enabling more rational assessments to be made. Recommendations are put forward for the future

Method of and apparatus for the superfinishing of a thin-wall metal workpiece

Abstract: A honing, superfinishing or superfinished grinding system utilizes a tool rotatable about an axis for superfinishing a surface of a thin wall workpiece whose other surface is directly contacted by a coolant to remove heat directly opposite the machining surface and thereby prevent distortion.

Apparatus for superfinishing bearing rollers

Abstract: A method and an apparatus are described for superfinishing convex or concave jacket faces of rotationally symmetrical workpieces, in particular of roller bearing rollers, in which the workpiece is received and rotated between two rotatable rollers, at least one of which is driven, while a honing stone is lowered perpendicularly to the longitudinal axis of the workpiece against the jacket face and thereby executes an oscillation parallel to the longitudinal axis of the workpiece. Along at least a portion of its stroke movement, the honing stone is imparted a further oscillation, synchronous with the first, along a curved path located in the jacket face of the workpiece.

Means and methods for abrading a work surface

Abstract: The invention relates to honing, polishing, reducing, or otherwise abrading, in which improved means and methods are employed for abrasion of workpieces (10) in general, and at least selected internal portions (16) of workpieces (10) such as bores, passages, and cavities in particular. In general, the abrasion is accomplished by the use of a flowable abrasive medium (18), with particular embediments using a visco-elastic, rheopectic abrasive medium. The abrasive medium (18) is in the form of a plastic or semisolid matrix containing abrasive particales (120) distri­ buted substantially uniformly throughout the matrix. The matrix transports the particles (120) through or across selected portions of a workpiece (122) being reated in order to permit the abrasive particles (120) to remove upraised metal and to round or radius corners as it passes, or to otherwise uniformly remove or finish these portions. Uni­ form distribution and maximised abrasive effect of the particles (120) is obtained by use of the matrix which also provides a relatively firm backing for the abrasive when the medium is subjected to high pressure.

Abrasive tool for honing

Abstract: The ratio of stock removal to tool wear (G ratio) of an abrasive tool having a copper-tin bond alloy with diamond abrasive grit dispersed therein is more than doubled when honing cast iron by including titanium carbide particulate in the bond alloy in an amount of about 0.5 weight percent to less than 20 weight percent, preferably from about 1 to 5 weight percent, based on the total weight of copper and tin.

Machine for superfinishing annular workpieces

Abstract: A machine for superfinishing annular workpieces such as bearings, including a mechanism for rotating the annular workpiece about a first axis of rotation, a holder for retaining in fixed relative positions a plurality of holding stones, and a mechanism for moving the holder to selectively bring any one of the honing stones into contact with the outer surface of the annular workpiece being superfinished

Device for honing workpieces

Abstract: A device for honing workpieces. The device includes a rotatable and axially reciprocating honing tool which is guided by an upper and a lower end section in corresponding bearings of a workholding fixture, and also includes a drive rod between the honing tool and a machine spindle. This drive rod is flexible in the radial direction, which prevents out-of-balance at high rotational speeds of the honing tool as a result of excessive mass and excessive play in pivot bearings, while the associated uncontrolled vibrations are also prevented.

Method of producing bearing surfaces

Abstract: In the method of producing bearing surfaces, in particular the inner surfaces of cylinder liners for internal combustion engines, first of all the bearing surfaces are fine-machined to the desired size and the geometric form by honing, whereupon the bearing surfaces fine-machined in this way are blasted with loose abrasive grain. Particles are thereby exposed at the surface which considerably improve the sliding properties and/or the strength of the running surface.

Grinding coolant solution feeding method and device thereof

Abstract: PURPOSE:To make the dressing of a grinding wheel attainable without interrupting grinding operation, by mixing particled hard abrasives such as silicon carbide system grains, glass beads, etc., periodically into a high pressure coolant solution, while reproducing a cutting edge by means of a liquid honing effect. CONSTITUTION:During grinding a work 2, if loading on a grinding surface 1a of a grinding wheel 1 happens, an on-off valve 15 is opened and hard abrasives 17 inside a hopper 16 is mixed in a coolant solution in a feed pipe 11. So, a high pressure coolant solution inclusive of the particled hard abrasive 17 is jettingly sprayed to the grinding surface 1a through a nozzle 10 whereby a blunted cutting edge surface in grains is dressed by means of a liquid honing effect, thus it is reproduced into a sharp edge surface. When proper dressing takes place upon continuation of this coolant solution jetting operation for the specified time long, the on-off valve 15 is closed and grinding operation by ordinary coolant solution feed continues to do as usual. Thus, grinding efficiency and service life in the grinding wheel both are improvable.

Inside-diameter saw

Abstract: A honing device for cutting and grinding is provided with a honing section (3) containing a diamond and arranged along the inner periphery (2) and consists of an annular metal carrier (1) which has a uniform polygonal inner periphery (2) along which the honing section (3) is formed, diamond particles being fastened electrolytically along the said polygonal inner periphery (2).

Surface coated throw-away chip for cutting

Abstract: PURPOSE:To develop excellent cutting capacity over a long period of time, by forming a softened layer to the scoop-up surface of the base of a surface coated throw-away chip to reduce high temp. plastic deformation as well as to secure toughness. CONSTITUTION:A WC base pressed powder body is sintered to prepare a throw- away chip made of a WC base hard alloy having a softened layer with a thickness of 10-200mum throughout the total surface thereof. The surface part other than the scoop-up surface of this throw-away chip is removed by grinding and honing is applied to the ground part. In the next process, a hard layer comprising TiCN or the like is formed on the surface thereof by a chemical vapor deposition method or a physical vapor deposition method. Because this surface coated throw-away chip has the softening layer formed only to the scoop-up surface thereof, plastic deformation is hardly generated. Therefore, the recession or the initial abrasion of a blade chip are reduced and excellent cutting capacity is developed over a long period of time.

Feed-up means for expandable work engaging members

Abstract: An improved drive chain for a machine tool such as honing device comprising a machine tool with at least one radially movable work engaging assembly thereon, a power train operatively connected to the honing device to rotate same, and a feed motor positioned in the power chain and rotatable therewith, the feed motor being operatively connected to a power source and to the machine tool whereby energization of the feed motor changes the radial positions of the work engaging assemblies on the honing device. The invention also resides in the rotatable power chain with a motor mounted therein, novel electric contacts for introducing energy to the rotating motor and a novel control circuit for supplying power from the power source to the feed motor.

Cylinder and cylinder liner for internal-combustion engine

Abstract: PURPOSE:To prevent abnormal wear of a cylinder liner, by constituting grinding scars formed over the inner surface of a cylinder liner by way of honing by first grinding scars intersecting with each other at 30 deg. or a smaller angle in the circumferential direction and second grinding scars having a smaller depth than the first grinding scars and the angle of intersection 5 deg. or more greater than that of the first grinding scars. CONSTITUTION:A cylinder 2 for an internal-combustion engine is made of cast iron, and wear-resisting surface treatment such as chromium plating is applied over the inner surface of the cylinder. Further, grinding scars 4 are formed in the inner sliding surface 3 by way of honing to constitute a proper angle in the circumferential direction. Here, the grinding scars 4 are constituted by first grinding scars 5 and second grinding scars 6 formed between the first grinding scars 5. The depth of the first grinding scars 5 is greater than that of the second grinding scars 6, and the angle theta' of intersection of the first grinding scars 5 in the circumferential direction is 30 deg. or less and selected to be 5 deg. or more smaller than that theta'' of the second grinding scars 6.

Honing machine with stonewear compensator

Abstract: A reversible d.c. torque motor advances and retracts a cone mechanism for radially expanding and contracting the stones of a tool for honing a bore in a workpiece. The motor is adapted to advance the cone mechanism at three different speeds so as to effect expansion of the tool first at a rapid traverse rate, then at a slower coarse feed rate and then at a still slower fine feed rate. Pulses representative of changes in position of the cone mechanism are routed to and are counted by a reversible counter which causes the cone mechanism to retract to different starting positions as the stones of the tool wear and reduce the effective diameter of the tool.

Honing control system

Abstract: A honing control system which can be balanced to independently control the honing and release stroke of a honing machine by utilizing a system incorporating a combination of air and liquid pressure to balance and regulate power and release stroke of the system uses a combination of liquid flow control and air exhaust control to regulate and balance the stroke speed of a honing head.

Microtome knife sharpening instrument

Abstract: An instrument for sharpening microtome knives and similar articles, having a honing mechanism and a deburring or stropping mechanism, arranged on a housing which encloses motors for driving the mechanisms. The knife is honed against a stone, which is mounted on a reciprocating carriage that has a variable speed control, and the honed knife blade is then deburred or stropped using a pair of counter-rotating disks, one for each side of the knife blade. A vise securely holds the knife and positions it at the proper angle for optimum honing, and the vise is mounted in a track which allows the knife blade to be moved back and forth across the reciprocating hone for uniform honing. A shield guards against inadvertent contact with the dangerously sharp blades during the honing operation, and guards are used to prevent the vise from leaving the track.

Method and device for surface machining

Abstract: of EP01139151. Method for the machining of surfaces, in which following the coarse machining there is a subsequent working by electroerosion and fine machining by honing, characterized in that for machining cylinder bores they are machined by a rotary driven tool having at least one electrode (28, 38, 43) and at least one spacer (29, 37, 42), erosion taking place in a narrow area moving over the surface to be machined behind which the spacer (29, 37, 42) is moved over the surface to be machined and rubs against the latter.

Honing device for cutting and grinding with diamond particles along the inner periphery

Abstract: In a honing device for cutting and grinding, which comprises an annular carrier (1) which is made of rolled metal and the inner periphery (2) of which has a circular configuration, a honing section (3) is arranged along this inner periphery (2), the width of which is smaller in the rolling direction of the said carrier (1) than in a direction (9) perpendicular to this rolling direction.

Manufacture of metallic plate for shadow mask

Abstract: PURPOSE:To improve the adhesive strength of the photoresist coated surface of a metallic plate to an original plate and to improve copying by finishing a work roll so as to have specific surface roughness and denseness in its surface by liquid honing, in finish rolling a metallic plate for shadow mask. CONSTITUTION:In a finish cold rolling or a temper rolling of a metallic plate for shadow mask, the surface of a work roll is finished by liquid honing so as to have 0.5-4.0mumRa surface roughness and 10-80HRC/2.5mm. denseness in its surface. In this case, the surface of metallic plate is adjusted to 0.2-2.4mumRa surface roughness and 10-80HRC/2.5mm. denseness in its surface. A photoresist is coated on the surface of a metallic plate prepared by said surface conditions, to overlap the metallic plate on a thick plate, and air existing between both plates is perfectly removed by evacuating the gap to bring the plate into tight contact with the original plate. Thus a copying is performed excellently.

Analyses of thermal deformation of workpiece in honing process (2nd report): temperature distribution, honing force and expansion pressure of honing stone

Abstract: Etude des phenomenes resultant du degagement de chaleur au cours du rodage. Influence du fluide de coupe et du frottement

Automatic water honing device

Abstract: PURPOSE:To perform water honing of intricate positions automatically with high productivity by detecting painting defects along the conveying line for substrates, and controlling the operations of automatic water honing robots on the downstream side in accordance with the information on said defects. CONSTITUTION:A substrate 1 such as automotive body 1 which has been undercoated and intercoated is inspected by an inspector 12 in an inspection stage A', and the information on the results thereof is stored in a control board 15 by instructing devices 13R, 13L for defects of painted surfaces. In a correcting and automatic water honing stage B', the contents of the storage of the board 15 are transmitted to a control board 18, by which water honing devices 16R, 16L are operated. After the side surfaces are automatically treated by an automatic water honing machine zone C-1' of a full surface water honing stage C', the substrate goes to a water honing robot 39 for curvature parts of a robot water honing zone C-2', where industrial robots 40, 40' operate to perform water honing for the intricate parts and to correct and perform water hoving for the other parts. The water hoving of the remaining parts is accomplished by industrial robots 41, 41'.

Production of pattern for casting mold

Abstract: PURPOSE:To produce a casting mold which withstands the pressurizing condition during casting efficiently by melt spraying a metal on the surface of a plastic distributed therein with metallic powder. CONSTITUTION:For example, a liquid epoxy resin suspended therein with powder of an optional metal such as iron, Al, Cu or an alloy thereof is coated on the surface of a plastic prototype. The metallic powder having about 50-300 mesh grain sizes is used in this case. After the coated surface is subjected to surface roughening such as sandpapering or honing, a metal is melt-sprayed thereon. The melt spraying of the metal can be accomplished by an ordinary method, and is satisfactory if a metallic layer of about 0.3-1mm. thickness is provided for the purpose of molding under 9kg/cm pressure. The melt sprayed body which has good adhesion and has a good release property from the plastic prototype after melt spraying is obtained by the above-described melt spraying method.

Short-stroking honing machine

Abstract: A honing machine includes a specially designed, pneumatic short-stroking circuit which may be actuated to oscillate a honing tool in the bottom of a bore to remove lower bore tapers with increased speed and efficiency.

Pipe internal surface honing device

Abstract: PURPOSE:To eliminate cause of the conventional bellmouth effect, by steppedly or continuously reducing the outer diameter of an auxiliary rod, along the jetting direction of abrasive, which is adapted to be inserted in a small diameter pipe to be treated CONSTITUTION:In a device for honing the internal surface of a small diameter pipe, an auxiliary rod 11 adapted to be inserted into a pipe 1 to be treated is forwarded by a feed device 12 for retractably forwarding the rod 11, and is rotated by a rotating motor 13 in the direction reverse to the treating direction Further, the auxiliary rod 11 has a diameter of about the half of the inner diameter of the pipe 1 to be honed In comparison with the diameter of the fluid jetting side of the auxiliary rod 11, the diameter of the rod 11 in the fluid discharging side thereof, is gradually reduced toward the front end of the rod from the lengthwise position of the rod which is in the vicinity of the position of 50- 70% of the length of the rod 11, finally having a diameter of about the one-third of the inner diameter of the pipe 1 As such, the auxiliary rod 11 steppedly or continuously decrease its outer diameter along the jetting direction of abrasive, thereby the cause of the conventional bellmouth effect may be eliminated

Process for dressing the honing stones of a honing tool and apparatus for carrying out the process

Abstract: In the case of a process for dressing the honing stones of honing tools, in particular of ceramically bonded honing stones, the honing tools are introduced into a dressing tool, having an interior contour which corresponds to the desired dimension of the honing tool and is formed by grinding stones, and the honing stones are dressed by relative movement between the honing tool and the dressing tool. The dressing tool may be designed as a constituent part of the machine tool or honing machine, with the result that the honing tool can be dressed without removal from the machine tool. The dressing tool comprises an exterior guide part in which a tubular cage is guided such that it can be axially displaced. Grinding stones are introduced in a radially adjustable manner into cutouts of the cage.