WO1989004230A1

WO1989004230A1 - Crankshaft miller

Info

Publication number: WO1989004230A1
Application number: PCT/JP1987/000850
Authority: WO
Inventors: Masanori Hazama
Original assignee: Kabushiki Kaisha Komatsu Seisakusho
Priority date: 1987-11-04
Filing date: 1987-11-04
Publication date: 1989-05-18

Abstract

This invention provides a simple, light crankshaft miller capable of being manufactured at a low cost, and offering a high processing accuracy without using a rugged bed. The crankshaft miller according to the present invention has a slide (3) which is supported on a saddle (2) disposed so that the saddle can be moved in the lengthwise direction of a bed (1), and which can be moved slidingly in the direction which is at right angles in a horizontal plane to the lengthwise direction of the bed (1), and a spindle head (6) which is supported so that the spindle head can be turned in the direction crossing the lengthwise direction of the bed (1) at right angles, on a pin means (7) supported on the slide (3) in a horizontal plane including the axis of a workpiece (17), and which is provided with a rotary cutter means (18), one end portion of the spindle head (6) being supported pivotably on a pivoting mechanism provided on the slide (3).

Description

Description of the invention The technical field of the invention

This invention is a crankshaft mirror for cutting a pin portion and a journal portion of a crankshaft used for an inner flint engine or the like. About.

BACKGROUND OF THE INVENTION

Conventionally, a power motor is rotated around a fixed work piece (hereinafter simply referred to as a work piece) that is processed into a crankshaft. Japanese Patent Application Laid-Open No. 59-71514 discloses a crankshaft mirror for cutting the pin portion and the journal portion of a work piece. In the publication described in this publication, the carriage described in this publication is provided with a carriage that can be moved back and forth in the vertical direction, and the pivot carriage is mounted on the carriage. In addition to supporting the fly sunit by the swing itself by the fin, the fly sunit is swung by the swing mechanism while the fly sunit is swinging by the swing mechanism. It is configured so that the pin and journal of the work are cut by a cutter installed in the license unit.

In the conventional crankshaft mirror, the fly sunit is supported by swinging itself, and a carriage that moves up and down with the swing is moved vertically. The structure is such that it can be supported by itself and receive cutting reaction force. It requires a pan, which makes the whole device large and heavy, and has the disadvantages of high price.

Summary of the Invention

The present invention has been made in order to improve the above-mentioned problems, and does not require a strong bead, can achieve high processing accuracy, and is simple and lightweight. Again, the aim is to provide a crankshaft mirror that is inexpensive to manufacture.

According to the present invention, in order to achieve the above-mentioned object, according to the present invention, the longitudinal direction (Z-axis direction) of the bead parallel to the axis of the workpiece to be machined is provided on the bead. (1) One saddle placed on its own, and a direction (Y) that is supported on the saddle and that is horizontally orthogonal to the z-axis direction by a slide drive mechanism. One slide slidable in the axial direction) and a pin means provided on the same horizontal plane as the workvisc. A spindle head that is swung in a direction (X-axis direction) perpendicular to the Z-axis direction about the pin means by a rotation mechanism; A work provided on the spindle head and fixed with the movement of the slide and spindle head Rotating cutter means for cutting the peak piece by rotating about the piece; and a pin journal and a main journal of the work piece. The present invention provides a crankshaft mirror capable of performing cutting with high accuracy.

The above and other advantages, embodiments and purposes of the present invention are as follows. BRIEF DESCRIPTION OF THE DRAWINGS Preferred embodiments consistent with the principles of the invention will be described with reference to the following description, given by way of example, and the accompanying drawings, in which: FIG. It will be clear to the expert.

Brief description of the drawings

FIG. 1 is a partial cross-sectional schematic front view of one embodiment of the crankshaft mirror of the present invention,

FIG. 2 is a longitudinal sectional view along the line Π—Π in FIG.

FIG. 3 is a schematic horizontal sectional view of a main part of the specific example shown in FIG.

FIGS. 4 and 5 are perspective views of the slides used in the specific examples shown in FIGS. 1 to 3 as viewed from different angles.

FIG. 6 is a partial longitudinal sectional schematic front view of another embodiment of the crankshaft mirror of the present invention,

FIGS. 7 and 8 are schematic front views, partially in vertical section, respectively, of still another embodiment of the crankshaft mirror of the present invention. And a vertical sectional view of the side, and

FIGS. 9 and 10 are schematic longitudinal and partial longitudinal sectional views, respectively, of a part of a fourth embodiment of the crankshaft mirror according to the present invention. .

Detailed Description of Preferred Embodiments Figures 1 to 5 show the first embodiment of the present invention. In detail, referring to the drawing, 1 is a bead in the figure, and two saddles 2 (only one is shown in the figure) on the bead 1 are worked. The bed 1 is movably mounted in the longitudinal direction (Z-axis direction) of the bed 1 parallel to the axis 0 of the piece 17, and the moving direction of the saddle 2 on these saddles 2. Slide 3 is supported by itself in the direction (Y-axis direction) orthogonal to (Z-axis direction).

As shown in FIGS. 4 and 5, the slide 3 has a support wall 3b on a base 3a parallel to the sliding direction of the slide 3 (Y-axis direction). ing .

Liners 5 that fit into the two guide rails 4 laid on the saddle 2 at different levels are fixed to the bottom surface of the base 3a.

At one end of the support wall 3b, a bearing hole 3d is formed so that the center is located on the same horizontal line as an elliptical through hole 3c opened at the center of the support wall 3b. In this bearing hole 3d, a spindle head 6 described later is supported via a pin 7 and a support wall 3d is provided. A case 3 e for accommodating a swing mechanism 8, which will be described later, is provided on the other end of the waist so as to project in the vertical direction (X-axis direction).

On the other hand, a ball nut 9 is fixed to the bottom of the slide 3 configured as described above, and the ball screw shaft of the slide drive mechanism 10 is fixed to the ball nut 9. 1 1 is screwed.

The slide drive mechanism 10 projects from one end of the saddle 2. The ball screw shaft 11 has the above-mentioned ball screw shaft 11 which is supported in the Y-axis direction via a bearing 12 on a bearing portion 2a of the ball screw shaft 11 provided. One end of the ball screw shaft 11 is connected to a slide motor 16 via bevel gears 14 and 15 housed in a bevel gear box 13. .

Then, the slide motor 16 reciprocates the slide 3 in the Y-axis direction in synchronization with a swing mechanism 8 described later. .

Further, the spindle head 6 is pivotally connected to the bearing hole 3 of the slide 3 via a pin 7; the spindle head 6 has a substantially egg shape with respect to the longitudinal section. And a circular hole 6a for passing the work piece 17 at a position where the center matches the center of the through hole 3c opened in the support wall 3b of the slide 3. The rotary cutter 18 is supported through a bearing 19 around the circular hole 6a. The rotary cutter 18 includes a drum 18a which is supported by a spindle head 6 via a bearing 19 and is rotatably supported by a spindle head 6, and an inner peripheral side of the drum ISa. And a disk-shaped force-cutter main body 18c having a cutting blade 18b on the radially inner side. Gear 18 d force is provided.

The gear 18 d is engaged with an intermediate gear 20 supported on a rotating shaft itself in a spindle head 6, and the intermediate gear 20 is a spindle gear. Rotation at the center of the pin 7 that supports the drill head 6 Attached to one end of the rotating shaft 21 that is supported by itself It is fitted to the toothed gear 22. The other end of the rotating shaft 21 protrudes from the end face force of the pin 7 and is fixed to the end by a gear 23. The gear 23 is attached to the end face of the pin 7 by a motor. It is fitted to the drive gear 26 of the cutter motor 25 mounted via the mounting member 24, and the above torque is applied by the cutter motor 25. Rotor 18 is to be rotated.

The element indicated by reference numeral 27 in the drawing is a counter mounted on the motor mounting member 24 so as to balance with the spindle head 6. It is a good luck.

On the other hand, the protrusion 6c protruding from the end of the spindle head 6 opposite to the support by the pin 7 is located on the case 3e side of the slide 3. One end of the horizontal shaft 30 is fixed to the distal end. The other end of the horizontal shaft 30 protrudes into the case 3e, and the movable piece 31 is fitted to the end of the horizontal shaft 30 via the bearing 32. However, the movable piece 31 is supported by its own rotation relative to itself. The movable piece 31 is inserted into the guide groove 33 a of the guide forest 33, which is vertically movably accommodated in the case 3 e, via the linear bearing 34. It is slidably supported in the axial direction.

The guide member 33 is fixed to a nut member 36 screwed to a ball screw shaft 35 provided in a case 3 e in a vertical direction (Y-axis direction). The ball screw shaft 35 can be moved up and down in the X-axis direction along with the reverse rotation. The upper and lower ends of the ball screw shaft 35 are bearings. 3 through 7 The bevel gear 40 of the oscillating motor 39 is fitted to the bevel gear 38 attached to the upper end while being supported by the slide 3. By rotating the above-mentioned ball screw shaft 35 forward and backward by the swing motor 39, the pin 7 for supporting the spindle 6 is provided. The spindle head 6 can swing in the X-axis direction around the center.

Next, the operation of the crankshaft mirror configured as described above will be described. The work piece to be cut (clunk shaft) is described below. 17 are installed on the bed 1 so that both ends of the 7 oppose each other, and are gripped between the chucks 41 a of the chuck table 41, and the pin section and the jumper are held. The machined part such as the null part is fixed so as to coincide with the center axis 0.

Subsequently, the two saddles 2 are moved to the machining position in the Z-axis direction, and both sides of the machined portion are supported by resting means (not shown). Each axis of the drive mechanism 10 is rotated synchronously by NC control.

Due to the rotation of the slide motor 3, the ball screw shaft 11 is rotated forward or reverse via the bevel gears 15 and 14 and thereby on the saddle 2. The slide 3 is reciprocated in the Y-axis direction at a fixed cycle, and the ball screw 40 is driven through the bevel gears 40 and 38 by the rotation of the oscillating motor 39. The shaft 35 is rotated forward or backward, whereby the spindle 6 is swung about the pin 7 in the X-axis direction at a constant cycle.

On the other hand, the rotation of the cutter motor 25 is greater than that of the gears 26 and 24. The power is transmitted to the gear 22 via the rotary shaft 21, and further transmitted to the rotary cutter 18 by the intermediate gear 20, and the rotary cutter 18 rotates in a predetermined direction. By the combination of the movement of the ride 3 and the swing of the spindle head 6, the pin of the work piece 17 fixed between the chucks 41a is provided. One nanometer 17a is turned around the outer circumference to cut the outer circumference of pin journal 17a.

The horizontal load generated at this time is carried by the pin 7 that supports the spindle head 6, and the vertical load is provided by the pin 7 and the X-axis direction. The separated ball screw shaft 35 now carries half each.

In addition, when the cutting of the pin journal 17 a of the work piece 17 is completed by the above operation, the saddle 2 is moved to the next journal 17 a. Then, the above operation is repeated to complete the cutting of all the pin journals 17a of the work piece 17.

Since the cutting of the main journal of the work piece 17 is the same as that described above, its description is omitted.

Fig. 6 shows another specific example in which the slide 3 is replaced. As shown in this figure, the slide 3 is large enough to accommodate the entire spindle head 6. You may do it.

FIGS. 7 and 8 show another specific example in which the swing mechanism is horizontally installed above the slide mechanism 10 with the pin 7 interposed therebetween. Therefore, this will be described next. The same parts as those in the first specific example are denoted by the same reference numerals, and description thereof will be omitted.

The slide 3 shown in Fig. 7 is guided by guide rails 4 'provided at the upper and lower portions of the saddle 2 and is movable in the Y-axis direction. The slide 3 has a spindle 6 force supported by the pin 7, and a projection 6 c ′ protrudes from above the pin 7. A moving piece 31 'is supported by a shaft 30' at the end of the part 6c '. The moving piece 3 is attached to the guide member 3 3 ′ on which the nut member 36 ′ is attached.

Move in the X-axis direction and be mounted on the nut member 36 'so as to be parallel to the ball screw shaft 11 of the slide mechanism 10 while being supported by itself. The ball screw shaft 35 'has been screwed.

One end of the screw shaft 35 'is supported on the slide 3 by a bearing 37', and the end of the motor is attached to the slide 3 at the end. The rotating shaft 39 'is rotated forward and rotationally by the swinging motor 39', and the pin 7 is rotated. At the center, the spindle head 6 can be swung in the X-axis direction.

The operation is the same as in the first specific example, and will not be described. 9 and 10 show that the swing mechanism of the spindle head 6 is rotated in the opposite position to the first embodiment, that is, with the pin 7 sandwiched. A fourth specific example is shown, which is installed at the horizontal extension of the rear end of the spindle head 6 opposing the Therefore, the swing mechanism itself is the same as that of the first specific example, and a description thereof will be omitted, but an arc-shaped guide centering on the pin 7 is provided at the portion where the swing mechanism of the slide 3 is provided. This is different from the first specific example in that a drill 47 is provided. By using the guide rail 47, the spindle head 6 can be automatically self-supported by the projection 6c protruding from the tip of the spindle head. It has a structure that supports both ends of the head 6 so that the load acting on the spindle head 6 is distributed.

Claims

The scope of the claims

1. On the head, move in the longitudinal direction (Z-axis direction) of the bed parallel to the axis of the work piece to be machined. One saddle placed on its own And one slide that is supported on the saddle and slides in a direction (Y-axis direction) that is horizontally orthogonal to the z-axis direction by a slide drive mechanism. And the pin is provided on the same horizontal plane as the peak piece, is supported by the slide in a rotating manner, and is pivoted about the pin by a swing mechanism. One spindle head swinging in a direction (X-axis direction) perpendicular to the Z-axis direction and fixed along with the movement of the spindle head A rotary force cutter for rotating the work piece and cutting the work piece; Crankshaft mirror.

2. The crankshaft mirror according to claim 1, wherein the spindle head is completely accommodated in the slide. Crankshaft s no o

3. The crankshaft mirror according to claim 1, wherein the swing mechanism supports the spindle head by itself in a rotating manner. A crankshaft mirror characterized in that it is erected on the tip side of the spindle head, which is located on the opposite side of the horizontal direction of the shaft means. .

4. The crankshaft mirror according to claim 1, wherein the swing mechanism rotates the spindle head. A crankshaft mirror characterized in that the pin means, which hinders its own position, is installed so as to extend horizontally in the vertical direction with respect to the longitudinal direction of the pin means. -

5. The crankshaft mirror according to claim 1, wherein the swing mechanism hinders the spindle head to rotate freely. A crankshaft mirror characterized by being provided at the rear end of the spindle head, which is located on the same side in the horizontal direction of the means. -

6. The crankshaft mirror according to claim 3, wherein the swing mechanism is integrally protruded from a tip portion of the spindle head. One protruding portion, a horizontal shaft rod fixed at one end to the protruding portion, and an upright portion integrally formed with the slide for the swing mechanism. A single ball screw shaft which is rotatably provided in the case via a rocking motor and is provided in the case, and which extends in a longitudinal direction; The ball screw shaft is screwed and moved up and down (X-axis direction) along the ball screw shaft according to the forward / reverse rotation of the ball screw shaft. One nut member, one guide member fixedly fitted to the nut member, and a guide groove formed in the guide member. Niichi And one movable piece that is supported by itself in the Y-axis direction via the linear bearings, and that supports the horizontal shaft so as to be relatively rotatable. The featured crankshaft mirror.

7. The crankshaft mirror described in claim 4 The swing mechanism is provided with one protruding portion integrally protruded above a rear end portion of the spindle head, and one end fixed to the protruding portion. One horizontal rod, one case horizontally provided integrally with the slide for the swing mechanism, and one case in the case. A single, horizontally extending pole screw shaft, which is provided at the rotation itself via the oscillating motor, is screwed to the ball screw shaft, and the ball screw shaft is One nut member that can be moved left and right horizontally (Y-axis direction) along the ball screw axis according to the forward and reverse rotation of the screw shaft, and the nut member A guide member fixedly fitted to the guide member; and one linear bearing in a guide groove formed in the guide member. And one movable piece that is supported in the Y-axis direction by itself via a shaft and that supports the horizontal shaft relative to the rotation itself. Rank Shaft Mirror.

8. The crankshaft mirror according to claim 5, wherein the swing mechanism extends to a rear end of the spindle head and extends horizontally. One protruding portion integrally protruded in the direction, and one horizontal shaft fixed at one end to the protruding portion; and a slide for the rocking mechanism. And a vertically extending one that is provided in a rotating manner via a single rocking motor in the case. The ball screw shaft of the book is screwed onto the ball screw shaft, and the ball screw shaft is moved up and down along the ball screw shaft according to the forward and reverse rotation of the ball screw shaft. One nut member to be moved downward (in the X-axis direction), one guide member to be fixedly fitted to the nut member, and a nut member formed in the guide member. One movement that is supported in the guide groove so as to be freely movable in the Y-axis direction via one linear bearing, and that supports the horizontal shaft relative to the rotation itself. The spine of the slide is supported so that the piece and one protruding portion integrally protruded from the tip of the spindle head are supported in a moving position. And a single guide rail having an arc centered on the pin means and provided at a position corresponding to the protruding portion of the dollar head tip. Clark shaft mirror.