WO2012049976A1

WO2012049976A1 - Crankshaft milling machine

Info

Publication number: WO2012049976A1
Application number: PCT/JP2011/072358
Authority: WO
Inventors: 武之鈴木; 史明浦
Original assignee: コマツＮｔｃ株式会社
Priority date: 2010-10-12
Filing date: 2011-09-29
Publication date: 2012-04-19
Also published as: KR101295105B1; CN103153510A; DE112011103440T5; DE112011103440B4; JP2012081550A; JP5237345B2; CN103153510B; KR20130029822A

Abstract

In order to enable two work rests to approach each other or to enable a work rest and a working section to approach each other, a crankshaft milling machine is provided with a pair of work heads (3a, 3b), a pair of swing heads (12a, 12b), and a pair of work rests (13a, 13b). Each of the work rests (13a, 13b) has: a body frame (24) moving together with the corresponding swing head (12a, 12b); a pair of clampers (25); and a clamper moving mechanism (26). The pair of clampers (25) is provided to the side surface of the body frame (24) which is on the opposite side of the swing head (12a, 12b). One end of each of the pair of clampers (25) is pivotably supported by the body frame (24), and the other end thereof can be opened and closed. The clamper moving mechanism (26) is disposed closer to the swing head (12a, 12b) than the pair of clampers (25) and moves the pair of clampers (25) along the spindle relative to the body frame (24).

Description

Crank shaft mirror

The present invention relates to a crankshaft mirror, and more particularly to a crankshaft mirror having at least one work rest for gripping a workpiece to be processed.

A crankshaft mirror is provided as an apparatus for cutting a crankshaft main journal and a pin journal (for example, Patent Document 1). The crankshaft mirror includes a pair of work heads provided on the bed, a pair of cutters disposed between the two work heads, and a work rest that is provided corresponding to each cutter and holds a workpiece being processed. and, the has. And these work heads, cutters, and work rests can move in a direction along the main axis (longitudinal direction of the bed).

Here, one set of cutter and work rest is fixed on one saddle, and the saddle is movable on the base. That is, the cutter and the work rest are movable along the main axis on the base as the saddle moves.

In the crankshaft mirror shown in Patent Document 1, the cutter and the work rest are both supported by the saddle, and their positional relationship is fixed. In this way, when the relative position between the cutter and the work rest is fixed, there are restrictions on processing.

Therefore, Patent Document 2 discloses a crankshaft mirror that can change the distance between the cutter and the work rest in order to eliminate such processing restrictions. In the crankshaft mirror shown in Patent Document 2, the cutter and the work rest are mounted on separate sliders, and the distance between the cutter and the work rest is obtained by moving each slider with separate driving means. it is possible to change the.

Furthermore, Patent Document 3 shows a crankshaft mirror that moves only a pair of clampers, not the entire work rest. The work rest of the crankshaft mirror is composed of a main body frame, a pair of clampers, and a clamper moving mechanism. The pair of clampers are supported by the main body frame so as to be freely opened and closed, and can be moved along the main axis with respect to the main body frame by a clamper moving mechanism.

JP-6-320319 discloses Japanese Patent Laid-Open No. 10-71518 JP 2005-219131 JP

In the crankshaft mirror disclosed in Patent Document 3, the distance between the cutter and the work rest can be easily changed by moving only the clamper, not the entire work rest.

Here, in Patent Document 3, the clamper moving mechanism is disposed on the main surface of the work rest and on the side facing the other work rest. And this mechanism is provided so that it may protrude from the main body frame to the other workrest side.

As described above, in the crankshaft mirror of Patent Document 3, the clamper moving mechanism of one workrest is provided so as to protrude toward the other workrest, so that interference between the protruding portion of the clamper moving mechanism and the workrest is avoided. Therefore, the pair of work rests cannot be brought close to each other. For this reason, depending on a processing part, a work can be clamped only by one work rest, and the posture of a work may not be stabilized during processing.

Moreover, when the structure of patent document 3 is applied to the crankshaft mirror in which the work rest is provided only on one side, the cutter on the other side may be brought closer to the work rest because of the protruding clamp moving mechanism. Can not. For this reason, there are problems such as an increase in processing steps.

An object of the present invention is to provide a crankshaft mirror having a work rest in which only a clamper is movable, so that the work portion including the other work rest or the other side cutter can be brought closer to one work rest. It is to.

The crankshaft mirror according to the first aspect of the present invention includes first and second workpiece support portions, a first processing portion, and a first workpiece rest. The first and second work support portions support both ends of the work in the longitudinal direction along the main axis. The first processing unit is disposed between the two workpiece support units so as to be movable along the main axis, and processes the workpiece. The first work rest is disposed on the opposite side of the first work support portion with the first processing portion interposed therebetween, and sandwiches the work. The first work rest has a main body frame that moves together with the first processing portion, a pair of clampers, and a first clamper moving mechanism. Each of the pair of clampers is provided on a side surface opposite to the first processing portion of the main body frame, and one end is rotatably supported by the main body frame, and the other end can be opened and closed. The first clamper moving mechanism is disposed closer to the first processing unit than the pair of clampers, and moves the pair of clampers along the main axis with respect to the main body frame.

In this apparatus, both ends of the work are supported by the first work support part and the second work support part. The workpieces supported by both workpiece support portions are sandwiched by a pair of clampers of the first workpiece rest and processed by the first processing portion. And when changing the position which clamps a workpiece | work, a pair of clamper is moved along a main axis | shaft by a 1st clamper moving mechanism. At this time, the pair of clampers move relative to the main body frame of the first work rest. That is, only one pair of clampers moves.

Here, the first clamper moving mechanism is arranged closer to the first processing section than the pair of clampers. That is, the first clamper moving mechanism does not protrude to the other side from the clamper. For this reason, there is no possibility that the 1st clamper moving mechanism may interfere with the other side processing part and work rest, and the 1st work rest can be brought closer to the other side processing part and work rest compared with the former. Therefore, the work can be held firmly and processing restrictions are reduced.

The crankshaft mirror according to a second aspect is the crankshaft mirror according to the first aspect, wherein the first clamper moving mechanism has a protrusion that protrudes from the main body frame to the first processing part side, The workpiece has a cutter drum penetrating the inside thereof, can swing around a swing shaft parallel to the main shaft, and can move in a direction perpendicular to the swing shaft. And the protrusion part of a 1st clamper moving mechanism is arrange | positioned outside the movement area | region of a 1st process part.

Here, in the crankshaft mirror, the first processing part moves while swinging. That is, the first processing unit has a predetermined range of movement area. Therefore, if the first clamper moving mechanism protrudes toward the first processing portion, the protrusion may interfere with the moving first processing portion.

Therefore, in the second invention, the protruding portion of the first clamper moving mechanism is disposed outside the moving area of the first processing portion. For this reason, interference with the 1st clamper moving mechanism and the 1st processing part can be avoided.

A crankshaft mirror according to a third aspect is the crankshaft mirror according to the second aspect, wherein the first clamper moving mechanism includes a movable block supported to be movable along the main axis with respect to the main body frame, and movement of the movable block. A guide unit for guiding and a drive unit for moving the movable block are provided. The pair of clampers are supported by the movable block.

Here, the pair of clampers are supported by the movable block, and the movable block moves while being guided by the guide section. Therefore, the pair of clampers move along the main axis stably and smoothly.

A crankshaft mirror according to a fourth aspect of the present invention is the crankshaft mirror according to the third aspect of the present invention, wherein the guide portion is a first guide unit and a second guide unit that are arranged vertically with the rotation support portion of the pair of clampers interposed therebetween. And a third guide unit disposed on the side of the rotation support portion between the first guide unit and the second guide unit.

Here, the movable block is guided by guide units provided at three places on the top and bottom and on the side between them. For this reason, movement becomes smoother.

The crankshaft mirror according to a fifth aspect is the crankshaft mirror according to the fourth aspect, wherein the drive portion of the first clamper moving mechanism drives one piston whose tip is fixed to a part of the movable block and one piston. having a cylinder for.

As described above, the movable block moves while being guided by the three guide units. Here, it is also conceivable to provide a driving unit in each guide unit. However, when a plurality of drive units are provided, it is necessary to operate them in synchronization. And when it cannot synchronize, it cannot move smoothly.

However, in the present invention, since the movable block is driven by a single piston, synchronous control is unnecessary, and the clamper can be moved easily and smoothly.

A crankshaft mirror according to a sixth aspect of the invention is the crankshaft mirror of the first aspect of the invention, further comprising a second processing portion and a second work rest. The second processing unit is disposed between the two workpiece support units so as to face the first processing unit and is movable along the main axis to process the workpiece. The second work rest is disposed on the opposite side of the second work support portion with the second processing portion interposed therebetween, and sandwiches the work. Further, the second work rest has a main body frame that moves together with the second processing portion, a pair of clampers, and a second clamper moving mechanism. Each of the pair of clampers is provided on a side surface opposite to the second processed portion of the main body frame, and one end is rotatably supported by the main body frame and the other end can be opened and closed. The second clamper moving mechanism is disposed closer to the second processing unit than the pair of clampers, and moves the pair of clampers along the main axis with respect to the main body frame.

Here, in addition to the 1st processing part and the 1st work rest, the 2nd processing part and the 2nd work rest are provided. And about the 2nd processing part and the 2nd work rest, it has the same composition as the 1st invention. Therefore, similarly to the above, there is no possibility that the first and second clamper moving mechanisms interfere with the other side work rest, and the first and second work rests can be brought closer to the other side work rest as compared with the conventional one. it can. Therefore, the work can be firmly held.

A crankshaft mirror according to a seventh aspect is the crankshaft mirror according to the sixth aspect, wherein the second clamper moving mechanism has a protruding portion that protrudes from the main body frame toward the first processing portion, and the second processing portion is The workpiece has a cutter drum penetrating the inside thereof, can swing around a swing shaft parallel to the main shaft, and can move in a direction perpendicular to the swing shaft. And the protrusion part of the 2nd clamper moving mechanism is arrange | positioned outside the movement area | region of a 2nd process part.

In the seventh aspect, similar to the second aspect, since the protruding portions of the first and second clamper moving mechanisms are arranged outside the moving area of the processing portion, interference between the two can be avoided.

As described above, in the present invention, the processing portion including the other work rest or the other side cutter can be brought closer to one work rest. For this reason, the restrictions on processing are reduced, and the workpiece can be processed efficiently.

1 is an external perspective view of a crankshaft mirror according to an embodiment of the present invention. The external view which looked at one workrest from the other workrest side. FIG. 3 is a partial sectional view taken along line III-III in FIG. 2. Enlarged partial view of FIG. 2. Perspective partial view of the work rest. FIG. 6 is a partial sectional view taken along line VI-VI in FIG. 2. The figure which shows the positional relationship of the moving range of a swing head, and the protrusion part of a clamper moving mechanism.

[overall structure]
FIG. 1 is an external perspective view of a crankshaft mirror according to an embodiment of the present invention. The crankshaft mirror 1 is disposed between a bed 2, first and second work heads (work support portions) 3a and 3b disposed on the bed 2 so as to face each other, and the work heads 3a and 3b. First processing unit 4a and second processing unit 4b.

[Work head]
The first and second work heads 3a and 3b support both ends of a crankshaft as a work. A chuck (not shown) for clamping the crankshaft is provided on each end face (opposing face) of each

work head

3a, 3b.

It should be noted that a chuck may be provided on one work head 3a, and a tail stock that supports the center hole on the end face of the crankshaft may be provided on the other work head 3b.

[Processing unit]
Each of the first and

second processing units

4a and 4b includes

saddles

10a and 10b, and slides 11a and 11b provided on the

saddles

10a and 10b. Each of the first and

second processing units

4a and 4b includes first and second swing heads (processing portions) 12a and 12b provided on the

slides

11a and 11b, and first and second work rests 13a and 13b, respectively. And have.

<Saddle>
The two

saddles

10a and 10b have the same configuration, and each of the

saddles

10a and 10b is movable in the longitudinal direction of the bed 2 (direction along the main axis = Z-axis direction) by a Z-axis feeding mechanism. The Z-axis feed mechanism is a well-known mechanism, and is connected to a nut member fixed to the

saddles

10a and 10b, a ball screw shaft extending along the Z axis and screwed into the nut member, and the ball screw shaft. And a Z-axis feed motor. Then, the

saddles

10a and 10b can be moved in the Z-axis direction by rotating the ball screw shaft forward and backward by the Z-axis feed motor.

<Slide>
The two

slides

11a and 11b have the same configuration, and each

slide

11a and 11b is movable in the Y-axis direction (depth direction of the bed 2) perpendicular to the Z-axis by the Y-axis feed mechanism. These

slides

11a and 11b have a vertical support wall 111 extending along the Y axis. A swing shaft 15 is provided at one end of the support wall 111, and a square cylindrical case 112 extending in the vertical direction is provided at the other end of the support wall 111. The Y-axis feed mechanism is a well-known mechanism, and is a nut member fixed to the

slides

11a and 11b, a ball screw shaft that extends along the Y axis and is engaged with the nut member, and this ball screw shaft is connected. And a Y-axis feed motor. The

slides

11a and 11b can be moved in the Y-axis direction by rotating the ball screw shaft in the forward and reverse directions with the Y-axis feed motor.

<Swing head (processing part)>
The first and second swing heads 12a and 12b have the same configuration and are mounted on the corresponding

slides

11a and 11b, respectively. Each

swing head

12a, 12b has one end supported by the swing shaft 15 and the other end supported slidably in the Y-axis direction with respect to the guide member 16 in the case 112.

The guide member 16 can move up and down in the case 112. Specifically, a nut member 17 is fixed to the guide member 16. The nut member 17 is screwed to a ball screw shaft 18 extending along the X axis provided in the case 112 in the vertical direction. The ball screw shaft 18 is connected to an X-axis swing motor (AC servomotor) 19 mounted on the side surface of the case 112 in the Z-axis direction.

With the configuration as described above, the ball screw shaft 18 is rotated forward and backward by the X-axis swing motor 19, whereby each

swing head

12 a, 12 b swings in the vertical direction (X-axis direction) about the swing shaft 15. It is adapted to be.

A cutter drum 20 is rotatably supported inside each

swing head

12a, 12b. An opening is formed on the processing stage side of the cutter drum 20, and a cutter (not shown) is attached to the opening. The cutter drum 20 is rotated by a cutter drum motor 21.

<Workrest>
For example, when processing the pin journal of the crankshaft, the first and

second workrests

13a and 13b clamp the main journal adjacent to the processing portion so that the crankshaft does not swing during processing. Is for. As shown in FIG. 1, these work rests 13a and 13b have relative positions to the corresponding first and second swing heads 12a and 12b in the

saddles

10a and 10b of the first and

second processing units

4a and 4b. Arranged in a constant state. For this reason, as the

saddles

10a and 10b are moved, the swing head 12a and the work rest 13a on one side move together, or the swing head 12b and the work rest 13b on the other side move together.

Since the first and second work rests 13a and 13b have the same configuration, the first work rest 13a will be described with reference to FIGS. 2 is a view of the first workrest 13a as viewed from the second workrest 13b side, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, FIG. 4 is an enlarged partial view of FIG. It is the isometric view fragmentary view which looked at the 1st work rest 13a from the opposite side to Drawing 2.

As shown in FIG. 2, the first work rest 13 a includes a main body frame 24, a pair of clampers 25, a clamper moving mechanism 26, and a clamper lock mechanism 27.

-Body frame-
The main body frame 24 is formed in a substantially rectangular shape as viewed in the direction along the main axis. The main body frame 24 is fixed to the saddle 10a, and is movable in the Z-axis direction along the main axis together with the saddle 10a by a Z-axis feed mechanism.

A circular opening 24a is provided at the center of the main body frame 24, and the crankshaft can pass through the opening 24a. In addition, a cutout portion 24b that opens outward is formed on a side portion of the main body frame 24.

-Clamper-
The pair of clampers 25 are disposed on the opposite side of the first swing head 12a with the main body frame 24 interposed therebetween, and are supported by the movable block 30 provided in the cutout portion 24b of the main body frame 24 so as to be opened and closed. The movable block 30 is provided with a pair of support shafts 31. One end side of the pair of clampers 25 is rotatably supported by these support shafts 31, and the other end side can be opened and closed. In FIG. 2, the clamper 25 in the closed state is indicated by a solid line, and the clamper 25 in the open state is indicated by a two-dot chain line. A semicircular cutout 25a is formed at the center of the surface of each clamper 25 facing the other clamper. The notch 25a is provided with a rest pad 25b for supporting the workpiece.

As shown in FIG. 3, a gear 32 that rotates about a support shaft 31 is fixed to each of the rotating portions of each clamper 25. The gears 32 fixed to the respective clampers 25 mesh with each other. Further, as shown in FIG. 4, one (upper) clamper 25 is formed with an extension portion 25 b that extends further to the outside of the rotating portion. A piston rod of the opening / closing hydraulic cylinder 33 is connected to the extension portion 25b via a connecting member 33a. A bush (not shown) is provided between the extension portion 25b and the connecting member 33a. The open / close hydraulic cylinder 33 has an upper end mounted on the main body frame 24.

With the above configuration, when the piston rod of the opening / closing hydraulic cylinder 33 expands and contracts, the upper clamper 25 opens and closes, and the lower clamper 25 opens and closes in synchronization with the upper clamper 25 by the pair of gears 32. It will be. The opening / closing hydraulic cylinder 33 is fixed to the main body frame 24, and the clamper 25 to which the piston rod of the opening / closing hydraulic cylinder 33 is attached moves about 20 mm in the Z-axis direction, as will be described later. Therefore, as described above, a bush is provided between the connecting member 33a to which the piston rod is connected and the extension 25b of the clamper 25, and the movement of the clamper 25 is absorbed by the elastic deformation of the bush. there.

-Clamper movement mechanism-
The clamper moving mechanism 26 is a mechanism for moving the pair of clampers 25 in the Z-axis direction with respect to the main body frame 24. The movable block 30, the guide portion 35, and the moving hydraulic cylinder 36 are connected to each other. Have. 6 is a partial sectional view taken along line VI-VI in FIG.

As shown in FIGS. 4 and 5 and the like, the movable block 30 is formed in a rectangular shape, and is disposed in the notch 24b so as to be vertically movable and movable in the Z-axis direction. .

The guide unit 35 guides the movement of the movable block 30 and includes three linear movement guides 38 provided on the upper and lower sides of the movable block 30 and outside the side of the support shaft 31 of the clamper 25. Each linear movement guide 38 includes a block 38 a and a rail 38 b, the block 38 a is provided on the main body frame 24, and the rail 38 b is fixed to the movable block 30. The block 38 b of the lateral linear movement guide 38 is fixed to an attachment block 39 fixed to the main body frame 24.

The moving hydraulic cylinder 36 is disposed in the vicinity of the linear movement guide 38 provided below, and is provided on the mounting block 39. Then, as shown in FIG. 6 which is a cross section taken along line VI-VI in FIG. 2, the tip of the piston rod 36a of the moving hydraulic cylinder 36 is connected to a member 38c fixed to the rail 38b of the linear movement guide 38.

With this configuration, when the piston rod 36a of the moving hydraulic cylinder 36 expands and contracts, the movable block 30 and the pair of clampers 25 attached thereto are guided by the three linear movement guides 38 and moved in the Z-axis direction. to.

-Clamper lock mechanism-
The clamper lock mechanism 27 is a mechanism for maintaining the clamper 25 in a closed state, and is provided on the open end side of the pair of clampers 25. As shown in FIG. 2, the clamper lock mechanism 27 has a pair of guide rails 43, a clamp jaw 44, and a clamp cylinder 45.

The pair of guide rails 43 extend in the horizontal direction and are provided vertically in parallel with each other. The clamp jaw 44 is guided by a pair of guide rails 43 and can move toward and away from the workpiece center. The clamp cylinder 45 is provided in a square hole formed at the center of the clamp jaw 44 and is fixed to the main body frame 24. The tip of the piston rod of the clamp cylinder 45 is attached to the clamp jaw 44. A pair of upper and lower legs 44a is formed at the end of the clamp jaw 44 on the clamper 25 side, and a pressing pad 46 is attached to the inside of each leg 44a. Further, a clamp pad 47 is attached to the outside of the clamper 25 on the open end side.

In such a clamper lock mechanism 27, the clamp jaw 44 is advanced and retracted toward the workpiece center by the expansion and contraction operation of the clamp cylinder 45. Then, the clamp pad 47 of the clamper 25 in the closed state is pressed by the pressing pad 46 of the clamp jaw 44, whereby the clamper 25 is held in the closed state.

[Relationship between clamper moving mechanism and swing head]
As is clear from FIGS. 3 and 6, the clamper moving mechanism 26 of the first work rest 13a has no portion protruding from the main body frame 24 toward the second work rest 13b, and conversely, the first swing head from the main body frame 24 is provided. It has the part P (henceforth "protrusion part") protruded to the 12a side. Specifically, the movable block 30, the linear movement guide 38 of the guide mechanism 35, the hydraulic cylinder 36 for movement including the piston rod 36 a, and the mounting block 39 are arranged on the second workrest 13 b side of the clamper 25 rather than the surface S. The first swing head 12a is disposed so as to protrude. Each member does not protrude from the surface S of the clamper 25 on the second workrest 13b side to the second workrest 13b side.

On the other hand, the protruding portion P of the clamper moving mechanism 26 is disposed so as to be located outside the moving region M of the first swing head 12a as shown in FIG. More specifically, a region M indicated by a one-dotted line in FIG. 7 is a region where the first swing head 12a moves during processing. The linear movement guide 38, the movement hydraulic cylinder 36, and the protrusions of the mounting block 39 are arranged outside the movement area M. FIG. 7 is a view of the movable range of the first swing head 12a as viewed from the first work head 3a side (the side opposite to the first work rest 13a).

The relationship between the clamper moving mechanism 26 of the first work rest 13a and the first swing head 12a has been described above, but the same applies to the relationship between the clamper moving mechanism 26 of the second work rest 13b and the second swing head 12b. .

[Operation]
The processing operation of the crankshaft is the same as the processing operation in the conventional crankshaft mirror. That is, the crankshaft clamping and unclamping by the first and second work rests 13a and 13b are controlled, and the processing positions of the first and second swing heads 12a and 12b are controlled, and a plurality of main journals and pins are controlled. The journal is cut. Note that the outer peripheral surface of the counterweight may be processed. The machining positions of the first and second swing heads 12a and 12b are controlled by moving the

saddles

10a and 10b by the Z-axis feed mechanism. Each journal is processed by swinging the first and second swing heads 12a and 12b by the X-axis feed mechanism while moving the

slides

11a and 11b in the Y-axis direction by the Y-axis feed mechanism.

In the above processing, the crankshafts of various specifications can be processed by moving the pair of clampers 25 independently of the swing heads 12a and 12b by the clamper moving mechanisms 26.

[Characteristic]
(1) Since each clamper moving mechanism 26 does not protrude toward the

other workrest

12a, 12b, the two

workrests

13a, 13b can be brought closer to each other as compared with the conventional one. For this reason, for example, when processing a pin journal, two main journals adjacent to the pin journal to be processed can be held between the two work rests 13a and 13b, and the crankshaft is firmly held for processing. be able to.

(2) The clamper moving mechanism 26 of each

workrest

13a, 13b has a protruding portion P protruding to the

corresponding swing head

12a, 12b side, and this protruding portion P is the movement of each

swing head

12a, 12b. It arrange | positions so that it may become out of the range of the area | region M. For this reason, each

swing head

12a, 12b can be brought close to the corresponding work rests 13a, 13b as in the prior art, and is not restricted during processing.

(3) The pair of clampers 25 are supported by the movable block 30, and the movable block 30 moves while being guided by the three linear movement guides 38. Therefore, the pair of clampers 25 can be moved smoothly in the Z-axis direction.

(4) The movable block 30 is guided by the linear movement guides 38 provided at three places on the top and bottom and on the side between them. For this reason, the movement of the clamp 25 supported by the movable block 30 becomes smoother.

(5) The movable block 30 is driven by one moving hydraulic cylinder 36. This eliminates the need for synchronous control of the hydraulic cylinder as in the case of driving with a plurality of hydraulic cylinders, and the clamper 25 can be moved easily and smoothly.

[Other Embodiments]
The present invention is not limited to the above-described embodiments, and various changes or modifications can be made without departing from the scope of the present invention.

(a) In the above embodiment, the present invention is applied to the crankshaft mirror provided with the first and second swing heads and the first and second work rests. However, only one swing head and work rest are provided. The present invention can be similarly applied to a crankshaft mirror.

(B) The specific configuration of the clamper moving mechanism is not limited to the above-described embodiment, and any configuration may be used as long as the mechanism moves the clamper in the Z-axis direction.

This crankshaft mirror can bring the work piece including the other work rest or the other side cutter closer to one work rest. For this reason, the restrictions on processing are reduced, and the workpiece can be processed efficiently.

1 Crankshaft mirrors 3a and 3b First and second work heads (work support portions)
4a, 4b 1st and

2nd processing unit

12a, 12b 1st and 2nd swing head (processing part)
13a, 13b First and second work rests 20 Cutter drum 24 Body frame 25 Clamper 26 Clamper moving mechanism 30 Movable block 35 Guide section 36 Hydraulic cylinder for movement 38 Linear movement guide

Claims

First and second work support parts for supporting both longitudinal ends of the work along the main axis;
A first processing unit that is disposed between the two workpiece support units so as to be movable along the main axis, and that processes the workpiece;
A first work rest disposed on the opposite side of the first work support portion with the first processing portion interposed therebetween, and for holding the work;
With
The first work rest is
A main body frame that moves together with the first processing portion;
A pair of clampers each provided on a side surface opposite to the first processing portion of the main body frame, one end of which is rotatably supported by the main body frame and the other end of which can be opened and closed;
A first clamper moving mechanism that is disposed closer to the first processing portion than the pair of clampers and moves the pair of clampers along the main axis with respect to the main body frame;
Having
Crankshaft mirror.
The first clamper moving mechanism has a protruding portion that protrudes from the main body frame to the first processing portion side,
The first processing unit has a cutter drum through which a workpiece penetrates, and can swing around a swing shaft parallel to the main shaft and can move in a direction perpendicular to the swing shaft;
The protruding portion of the first clamper moving mechanism is disposed outside the moving area of the first processing portion,
The crankshaft mirror according to claim 1.
The first clamper moving mechanism includes:
A movable block supported movably along the main axis with respect to the main body frame;
A guide unit for guiding the movement of the movable block;
A drive unit for moving the movable block;
Have
The pair of clampers are supported by the movable block;
The crankshaft mirror according to claim 2.
The guide portion includes a first guide unit and a second guide unit that are arranged above and below the rotation support portion of the pair of clampers, and the rotation between the first guide unit and the second guide unit. The crankshaft mirror according to claim 3, further comprising a third guide unit disposed on a side of the dynamic support portion.
5. The crank according to claim 4, wherein the drive unit of the first clamper moving mechanism includes one piston having a tip fixed to a part of the movable block, and a cylinder for driving the one piston. shaft mirror.
A second processing part that is disposed between the two work support parts so as to face the first processing part and is movable along the main axis;
A second work rest that is disposed on the opposite side of the second workpiece support portion across the second processing portion, and sandwiches the workpiece;
Further comprising
The second work rest is
A main body frame that moves together with the second processing portion;
A pair of clampers each provided on a side surface opposite to the second processing portion of the main body frame, one end of which is rotatably supported by the main body frame and the other end of which can be opened and closed;
A second clamper moving mechanism that is disposed closer to the second processing unit than the pair of clampers and moves the pair of clampers along the main axis with respect to the main body frame;
Having
The crankshaft mirror according to claim 1.
The second clamper moving mechanism has a protruding portion that protrudes from the main body frame to the first processing portion side,
The second processing unit has a cutter drum through which a workpiece penetrates, and can swing around a swing shaft parallel to the main shaft and can move in a direction perpendicular to the swing shaft.
The protruding portion of the second clamper moving mechanism is disposed outside the moving area of the second processing portion.
The crankshaft mirror according to claim 6.