摘要:
A crankpin phase indexing apparatus for indexing a crankpin on an axis of a main spindle in a crankpin grinding machine, and a method therefor. The apparatus comprises a main spindle (22) having a chuck body (25), a phase rotating shaft (53) deviating from the axis of the main spindle, a coupling (63) detachably connecting the chuck body and the phase rotating shaft to each other, and a clamp (40) for restraining rotation of the phase rotating shaft. At the time of processing, the clamp is released and the coupling is placed in a connecting condition whereby the chuck body and the phase rotating shaft are unitarily rotated simultaneously with rotation of the main spindle. At the time of indexing, the clamp is actuated and the coupling is placed in a released condition whereby the chuck body is rotated about the main spindle relative to the phase rotating shaft in keeping with rotation of the main spindle. Accordingly, a crankshaft caught by the chuck body can be indexed to a predetermined phase while maintained in a position relative to the axis of the main spindle where it was prior to indexing.
摘要:
In a crank pin grinding machine, device and method for indexing the phase of a crank pin that can index the phase while a spindle is being rotating. The device comprises a pair of spindles (23, 24) disposed on a first axis ( alpha ) so as to be separated away from and facing each other and adapted to be driven synchronizing with each other, a chuck main body (26, 27) provided on a leading end of each of the spindles for gripping a crank shaft (34) on a second axis ( beta ) that is parallel to the first axis ( alpha ), a phase changing shaft (55) provided on the second axis ( beta ) of at least one of the chuck main bodies for indexing crank pins (40-42) having different phase angles on the first axis ( alpha ) and a phase indexing shaft (65) coupled to the phase changing shaft so as to be rotatingly driven concentrically with the spindles, the device being controlled such that a first mode in which the phase changing shaft is rotated in a synchronized fashion at the same speed as that of the spindles and a second mode in which the phase changing shaft is rotated in a synchronized fashion with a relative speed difference are effected.
摘要:
Chamfering (C1) is performed along the edge of a notch (3) groove by the center O1 of a grindstone (5). Change to grindstone center (O2) is performed to perform chamfering (C2) along the edge of the notch groove. Similarly, chamfering C3, C4 and C5 are formed. A grindstone (5) having a large diameter can be employed. Only control of the diameter of the grindstone (5) is required to maintain the shape. Satisfactory surface roughness can be realized. It is possible to improve surface roughness of a notch (3) groove of a wafer (1) and realize high efficiency.
摘要:
A workpiece receiving hole 60a for fittingly receiving a workpiece 17 is formed in the center of a rotary disk 60 which is thinner than the workpiece 17. A workpiece drive section 60b which engages a notch 17a formed for the purpose of orienting the workpiece 17 relative to crystal orientation is formed along the brim of the hole 60a. A gear 59 is rotated by a gear 62 of a motor 61, thereby rotating the rotary disk 60 and imparting torque to the workpiece 17. Accordingly, both surfaces of the workpiece are ground by means of a double disc surface grinder.
摘要:
A wire saw which can improve a working accuracy is provided. When a wire goes to a rightward direction (R) by a rotation of a moving motor, the wire is inclined (Y) in such a manner as to be moved toward a right and outer periphery from an inner portion of a work, and a cutting start point of the work becomes a point (C) within the work. Further, when a wire goes to a leftward direction (L) by a rotation of the moving motor, the wire is inclined (X) in such a manner as to be moved toward a left and outer periphery from an inner portion of a work, and a cutting start point of the work becomes a point (C) within the work. Then, the work is cut from the cutting start point by a sufficient slurry containing float abrasive grains supplied to a portion on the wire.
摘要:
An aqueous working liquid composition for a wire saw comprising the following components (A) to (E): (A) 10 to 60% by weight of at least one selected from the group consisting of polyglycol ethers represented by the following formulae (I) and (II):
R 1 -O-(CH 2 CH 2 O) n -R 2 (I)
wherein R 1 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a phenyl group; R 2 represents a hydrogen atom or an acetyl group; and n represents an integer of 1 to 4; (B) 0.1 to 5.0% by weight of at least one selected from the group consisting of organic bentonite and inorganic bentonite; (C) 0.01 to 5.0% by weight of at least one selected from the group consisting of carboxymethyl cellulose (CMC), MgO, methanol, and ethanol; (D) 0.1 to 2.0% by weight of at least one selected from the group consisting of a sodium β-naphthalenesulfonate-formalin condensate and a sodium, potassium, lithium or amine salt of petroleum or synthetic sulfonic acid; and (E) 10 to 70% by weight of water, each based on the total composition weight.
摘要:
In a wire saw, it is an object to suppress the cutting thickness of a work, cutting capability and coarse degree of a cutting plane from being varying between the one end and the other end of a machining roller. A plurality of machining rollers 13 and 14 are arranged in parallel at prescribed intervals, and a large number of circular grooves 13a and 14a are formed on the outer periphery of each of the rollers. In an axial direction of the machining rollers 13 and 14, a plurality of flows of supply reels 23, take-up reels 24 and wires 15A, 15B are arranged. The wires 15A, 15B supplied from the supply reels 23 are wound on the circular grooves 13a ad 14a of the plurality of machining rollers 13 and 14 so that they are travelled between the plurality of rollers 13 and 14, and taken up by the take-up reels 24. The work 20 is cut/sliced by a lapping operation of abrasive grains contained in the slurry which are supplied on the respective sets of wires 15A and 15B which travel between the plurality of machining rollers 13 and 14 in a longitudinal direction in a manner of sharing predetermined amounts.
摘要:
The wire saw (W) includes a wire (41) that has a plurality of wire lines extending in parallel to one another. The wire (41) is supplied with slurry containing abrasive grains in dispersing liquid to cut a workpiece (46) so as to simultaneously produce a multiplicity of wafers. A mixer device (2) mixes the slurry prior to supplying of the slurry to the wire saw (W). A first supplying device (21) supplies the grains to the mixer device (2). A second supplying device (22) supplies the dispersing liquid to the mixer device (2). A first adjusting device (V21) adjusts the amount of the grains supplied to the mixer device (2) from the first supplying device (21). A second adjusting device (V22) adjusts the amount of the liquid supplied to the mixer device (2) from the second supplying device (22). A control means (C1) controls the first adjusting means (V21) and the second adjusting means (V22) to maintain the mixed weight ration of the abrasive grains and the liquid including the oil within a range between 1:0.91 to 1:0.6 and mixed weight ration of the abrasive grains and the liquid including the water within a range between 1:0. to 1:0.5 when the mixer means mixes the slurry. A detecting means (S1,S2) for detecting ration of the grains contained in the slurry; and said control means (C1) controlling the first adjusting means (V21) and the second adjusting means (V22) based on the detected ratio, wherein said detecting means includes at least one of means (S1) for measuring specific gravity of the slurry and means (S2) for measuring viscosity of the slurry. The wire saw (W) being arranged to discharge the slurry used to cut the workpiece (46), said discharged slurry including particle components smaller than the grains; separating means (6,7; 8,6; 9a,9b,9c,9d; 100,107) for separating the particle components from the slurry to collect the dispersing liquid and the grains from the slurry that is discharged from the wire saw (W); and said mixer means (2) being arranged to mix the slurry with the dispersing liquid and the grains both collected by the separating means (6,7; 8,6; 9a,9b,9c,9d; 100,107).