JP2002187035A - Work clamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work clamp device clamping the outside diameter of a work with a base stock vice jaw and a moving stock vice jaw, wherein fine position adjustment of the base stock vice jaw is easily made with high degree of precision. SOLUTION: The base stock vice jaw 1 is supported movably in and out on a pedestal 3, and mounted on the tip of a supporting member 5 locked at a randomly chosen position by a lock means 10. The wedge-shaped adjustment liner 15 capable of advancing and retreating in a direction orthogonal to the moving direction is incorporated in the adjustment clearance 14 between the rare end surface 5a of the supporting member 5 and the supporting surface 13a on the side of a pedestal 3 facing the rare end surface 5a. Screw means 16 for advancing and retreating a liner is provided together which finely adjusts forward and backward of the moving direction of the supporting member 5 the position of a receiving surface 15a with which the rare end surface 5a of the supporting member 5 is brought into contact by moving the adjustment liner 15 advancingly and retractingly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work clamping apparatus used for a chamfering machine for chamfering both ends of a rod-shaped work.

[0002]

2. Description of the Related Art As shown in FIG. 5, a work clamp apparatus of this type comprises a workpiece V between a reference vice jaw 1 and a movable vice jaw 2 which can move in a distance direction with respect to the reference vice jaw 1. , The work holding surface 1 of the reference vice jaw 1 and the moving vice jaw 2
“a” and “2a” are formed with high accuracy corresponding to the designed finished outer diameter of the work W. Accordingly, the moving vice jaw 2 is moved closer to the reference vice jaw 1 to move the work W
Is clamped to the outside diameter, the workpiece W is accurately positioned so that its axis Wc coincides with the fixed position P determined by the workpiece clamping surface 1a of the reference vice jaw 1.

[0003] However, the accuracy of the outer diameter of the work W generally varies from one production lot to another, and the work clamping surface of the vice jaw also wears out due to long-term use. Accordingly, initially, the axis Wc of the workpiece W clamped with the outer diameter is set to
Even if the fixed position P determined by the work holding surface 1a of the reference vice jaw 1 matches, if the work holding surface of the vice jaw wears due to a change in the production lot of the work W to be handled or long-term use, The axis Wc of the workpiece W whose diameter is clamped is the workpiece clamping surface 1 of the reference vice jaw 1.
a from the fixed position P determined by a in the direction connecting the two vice jaws 1 and 2 (usually, the horizontal direction X). As a result, for example, the rotation axis of the chamfering cutting tool for chamfering both ends of the workpiece W having the outer diameter (coincident with the initial position P) and the axis of the workpiece W having the outer diameter clamped. Wc deviates, and the desired chamfering cannot be performed.

Therefore, it is necessary to configure the reference vice jaw 1 so that the position can be finely adjusted in the horizontal direction X.
Conventionally, the rear end of the reference vice jaw 1 is configured to be extrudable directly by a push screw, and the adjusted reference vice jaw 1 is adjusted.
Was configured to be locked with a lock screw.

[0005]

In the conventional structure as described above, the adjustment allowance of the reference vice jaw 1 by one rotation of the push screw is equal to one pitch of the push screw, and is 1/1.
Adjustment in units of 00 mm, that is, high-precision adjustment was very difficult.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a work clamping apparatus which can solve the above-mentioned conventional problems. The reference vice jaw 1
And a movable vice jaw 2 that can move in the near and far directions with respect to the reference vice jaw 1.
Is mounted on the front end of a support member 5 which is supported by the mount 3 so as to be able to move back and forth and is locked at an arbitrary position by a lock means 10, and a rear end face 5a of the support member 5 and the side of the mount 3 facing the mount 3 In the adjustment gap 14 between the support surface 13a and
A wedge-shaped adjustment liner 15 that can move forward and backward in a direction perpendicular to the direction of movement of the support member 5 is provided.
In this configuration, a liner advance / retreat driving screw means 16 for finely adjusting the position of the receiving surface 15a to be contacted with the support member 5 in the forward and backward directions of movement of the support member 5 is provided.

In carrying out the work clamping apparatus of the present invention, specifically, a spring 27 for urging the support member 5 in a direction in which the rear end face 5a is pressed against the receiving face 15a of the adjustment liner 15 is provided. You can do it.
In this case, the support member 5 is provided with a vertical hole 20 at an intermediate position in the movement direction, and a horizontal hole 21 is provided between the vertical hole 20 and the support member rear end surface 5a. Is mounted with a spring receiver 22, and the vertical hole 20 has:
The spring receiving member 23 provided on the gantry 3 side is loosely fitted, and the spring 27 is attached to the spring receiving member 22.
Between the spring receiving member 23 and the horizontal hole 21.

The adjusting liner 15 has an operating end 1 which projects from the adjusting gap 14 and projects laterally.
5c, and the liner advance / retreat clamp screw means 16
Is a liner pushing bolt 1 that penetrates the operation end 15c of the adjustment liner 15 and is screwed into a screw hole 17 provided on the gantry 3 side facing the operation end 15c.
8 and a liner pull-out bolt 19 that is screwed through the operation end 15c of the adjustment liner 15 and whose tip abuts on the end surface 13b on the side of the gantry 3 facing the operation end 15c. I can do it.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
Is a reference vice jaw and 2 is a moving vice jaw. The reference vice jaw 1 is provided at a tip of a support member 5 which is fitted in a support hole 4 provided in the base 3 on the side of the reference vice jaw so as to be movable in the horizontal direction X connecting the two vice jaws 1 and 2. The moving vice jaw 2 is mounted via a mounting attachment 6, and is fitted inside the base 7 on the moving vice jaw side so as to be movable in the left-right horizontal direction X connecting the two vice jaws 1 and 2, and is driven by driving means (not shown). It is attached via a vice jaw attachment 9 to the tip of a moving member 8 that is reciprocated.

The support member 5 is locked at an arbitrary position with respect to the gantry 3 by a lock means 10. This locking means 10
Are two vertical locking screws 11a, 1 screwed into the gantry 3 so as to press the support member 5 downward at two front and rear positions.
1b and two horizontal lock screws 12 screwed to the gantry 3 so as to press the support member 5 laterally at two front and rear positions.
a and 12b.

As shown in FIGS. 2 to 4, a rear end face 5a of the support member 5 and a pedestal-side support face 13a facing the rear end face 5a (a cover plate 13 attached to the rear side of the gantry 3 so as to close the support holes 4). And an adjusting gap 14 is formed between the adjusting gap 14 and the front and rear horizontal direction orthogonal to the moving direction of the support member 5 (the horizontal direction X in the length direction of the support member 5). A wedge-shaped adjustment liner 15 is provided so as to be movable in the direction Y. Thus, the wedge-shaped adjustment liner 15 has a receiving surface 15a in surface contact with the support member rear end surface 5a.
And a working surface 15b that comes into surface contact with the gantry-side support surface 13a. The gantry-side support surface 13a and the working surface 15b that comes into surface-contact with the gantry-side support surface 13a have, for example, a gradient of about 2/100 with respect to the front-rear horizontal direction Y. Slope.

The adjusting liner 15 is provided with a screw means 16 for driving the liner forward and backward. The adjusting liner 15 is provided with an operating end 15c that protrudes from the adjusting gap 14 and protrudes laterally, and the liner advancing / retreating clamping screw means 16 connects the operating end 15c of the adjusting liner 15 to the operating end 15c. A liner push-in bolt 18 that penetrates and is screwed into a screw hole 17 provided on the gantry 3 side (cover plate 13) facing the operation end 15c;
A liner pull-out bolt 19, which is screwed through the operation end 15c of the adjustment liner 15 and whose tip abuts on the end surface (side surface of the cover plate 13) 13b of the gantry 3 facing the operation end 15c. Have been.

The support member 5 is provided with a large-diameter true circular vertical hole 20 at an intermediate position in the movement direction, and a horizontal hole 21 between the vertical hole 20 and the support member rear end face 5a. At an end of the horizontal hole 21, a spring receiver (a plug fitted with a screw is illustrated, but a pin or the like that crosses the horizontal hole 21 may be attached) 22. A spring receiving member 23 is provided on the lower surface of the support hole 4 of the gantry 3 so as to fit loosely into the vertical hole 20. The spring receiving member 23 is of a perfect cylindrical shape,
One fixing bolt 2 penetrating through the eccentric position in a state where the lower end is fitted in a true circular recess 24 formed on the lower surface of the
5 is attached to the lower surface of the bearing hole 4. or,
A recess 26 is formed on the peripheral surface of the spring receiving member 23 facing the lateral hole 21 in this mounting state, and the lateral hole 21 is formed between the concave 26 and the spring receiving member 22 at the end of the lateral hole. A compression coil spring 27 is interposed therein, and the support member 5 is moved by the spring 27 to the rear end face 5a.
Are urged in the direction of pressing against the receiving surface 15a of the adjustment liner 15.

In FIG. 1, reference numerals 28A and 28B denote a set of front and rear chamfering cutting tools for chamfering both ends of a workpiece W clamped by a reference vice jaw 1 and a moving vice jaw 2. Thus, the workpiece W can approach and move toward the workpiece W while rotating around the axis Wc concentrically with the axis Wc of the workpiece W.

According to the both-end chamfering machine having the above-described configuration, a pair of front and rear chamfering cutting tools 28A and 28B are rotated while the workpiece W is clamped by the reference vice jaw 1 and the moving vice jaw 2 in outer diameter. By moving them closer to each other, the set of front and rear chamfering cutting tools 28A,
28B, both ends of the work W can be automatically chamfered. However, when the production lot of the work W to be handled changes and its outer diameter changes, or when the work clamping surfaces 1a, Due to the wear of 1b, a deviation of an allowable error or more in the left-right horizontal direction X occurs between the axis Wc of the workpiece W whose outer diameter is clamped and the rotation axis of the pair of front and rear chamfering cutting tools 28A and 28B. In other words, in other words, the axis W of the workpiece W having the outer diameter clamped is
In the case where a deviation exceeding a permissible error occurs in the left-right horizontal direction X between the position c and the fixed position P (see FIG. 5) determined by the work clamping surface 1a of the reference vice jaw 1, the work clamping device of the present invention The error can be returned to an allowable range by the adjustment liner 15.

That is, when the axis Wc of the work W whose outer diameter is clamped is deviated toward the reference vice jaw 1, the lock screws 11a to 12b of the lock means 10 are loosened, and the liner advance / retreat driving screw means 16 is provided. The liner pull-out bolt 19 is loosened and moved backward, and the liner advance / retreat driving screw means 16 is moved in a state where a gap is secured between the liner pull-out bolt 19 and the end surface 13b on the gantry 3 side.
Of the liner pushing bolt 18 is screwed. As a result, the adjustment liner 15 is pushed into the adjustment gap 14,
With the receiving surface 15a, the support member 5 can be pushed out from the support hole 4 of the gantry 3 toward the moving vice jaw 2 in the left-right horizontal direction X, and the position of the reference vice jaw 1 is moved toward the moving vice jaw 2 by a desired amount. Can be displaced.

Conversely, when the axis Wc of the workpiece W whose outer diameter is clamped is biased toward the moving vice jaw 1,
While the lock screws 11a to 12b of the lock means 10 are loosened, the liner pushing bolt 18 of the liner advance / retreat driving screw means 16 is loosened and moved backward, and the head of the liner pushing bolt 18 and the adjustment liner 15 are operated. The liner pull-in bolt 19 is screwed in a state in which a gap of an appropriate size is secured between the head end of the liner push-in bolt 18 and the operating end 15 c of the adjustment liner 15. Is pulled out from the inside of the bearing hole 4 until it contacts. As a result, the receiving surface 15a of the adjustment liner 15 moves away from the rear end surface 5a of the support member 5, so that the supporting member 5
7, the support member 5 is moved backward by the urging force, and the rear end surface 5a of the support member 5 is always kept in contact with the receiving surface 15a of the adjustment liner 15. At this time, the reference vice jaw 1
Is in a state of moving away from the movable vice jaw 2 beyond the target adjustment position. In other words, the adjustment liner 15 may be pulled out and the support member 5 may be moved backward into the support hole 4 so as to be in such a state.

When the biasing force of the spring 27 is weak or the spring 27 is not used, the adjusting liner 15 is pulled out and moved, and then the support member 5 is manually pushed into the support hole 4. Alternatively, the rear end surface 5a can be brought into contact with the receiving surface 15a of the adjustment liner 15.

As described above, once the support member 5 (reference vice jaw 1) is moved in a direction away from the movable vice jaw 2 beyond the target adjustment position, the shaft of the workpiece W whose outer diameter is clamped. In the same manner as when the center Wc is biased toward the reference vice jaw 1, the liner drawer bolt 19 is further loosened and moved backward, so that a gap is formed between the liner drawer bolt 19 and the end surface 13b on the gantry 3 side. In the secured state, screw in the liner pushing bolt 18 and push the adjusting liner 15 into the adjusting gap 14,
The support member 5 is pushed out from the support hole 4 of the gantry 3 toward the moving vice jaw 2 in the horizontal direction X by the receiving surface 15a, and the position of the reference vice jaw 1 is displaced by a desired amount toward the moving vice jaw 2. Just do it.

As described above, the adjusting liner 15 is taken in and out, and the axis Wc of the workpiece W clamped by the reference vice jaw 1 and the moving vice jaw 2 is fixed at the fixed position P (one set of front and rear chamfering cuts). The reference vice jaw 1 is positioned so as to be positioned at the position corresponding to the rotation axes of the tools 28A and 28B.
Is adjusted in the horizontal direction X in the left-right direction, the support members 5 may be fixed to the gantry 3 by screwing the lock screws 11 a to 12 b of the lock means 10. At this time, if there is a gap between the head of the liner pushing bolt 18 of the liner advance / retreat driving screw means 16 and the operating end 15c on the adjustment liner 15 side, or if the liner pulling bolt 19 If there is a gap between the tip and the end surface 13b (side surface of the cover plate 13) on the side of the gantry 3, the liner pushing bolt 18 or the liner pulling bolt 19 may be screwed in so as to eliminate the gap. .

[0021]

The work clamp device of the present invention can be implemented and used as described above. According to the work clamp device of the present invention, the reference vice jaw is moved far and near the moving vise jaw. When it is necessary to adjust the position in the direction, the wedge-shaped adjustment liner is pushed into and moved by the liner advance / retreat drive screw means into the adjustment gap between the rear end of the support member supporting the reference vice jaw and the mount side, or After the support member (reference vice jaw) is retracted to the adjustment gap side in a state where the wedge-shaped adjustment liner is once pulled out of the adjustment gap and moved, the wedge-shaped adjustment liner is pushed into the adjustment gap by the screw means for driving the liner advance / retreat. By moving, the position of the reference vice jaw can be easily adjusted.

In addition, the wedge-shaped adjustment liner is moved forward and backward, and the support member (reference vise jaw) is pushed and moved in a direction perpendicular to the moving direction.
The pushing amount of the support member (reference vise jaw) for one pitch of the screw of the screw means for driving the liner advance / retreat is determined by changing the gradient of the wedge-shaped adjusting liner (for example, 2 /
100) can be converted to the minimum value multiplied by
Fine adjustment in units of 100 mm can be easily, easily, and accurately performed.

According to the second aspect of the present invention, even when the position of the support member (reference vice jaw) is adjusted in the direction away from the movable vice jaw, the adjustment liner is adjusted by the liner advance / retreat driving screw means. The support member can be moved back and forth with the urging force of the spring simply by being pulled out from the gap, and it is not necessary to manually push and move the support member, so that the adjustment operation can be performed more easily and easily.

In this case, according to the third aspect of the present invention, the spring can be provided inside the support member, and the space for disposing the spring outside the support hole for supporting the support member is provided. The size of the entire apparatus can be reduced as compared with the case where it must be secured.

Further, according to the configuration of the fourth aspect, the liner advance / retreat driving screw means for moving the adjustment liner forward / backward with respect to the adjustment gap includes two bolts of a liner pushing bolt and a liner pullout bolt. And the two operations of pushing and pulling out the adjustment liner can be performed accurately.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a work clamping device of the present invention is applied to a chamfering machine at both ends.

FIG. 2 is a vertical sectional front view of a main part of FIG.

FIG. 3 is a cross-sectional plan view of a main part of FIG. 1;

FIG. 4 is a side view of a main part of FIG. 1;

FIG. 5 is a front view illustrating an outer diameter clamp of a work by a reference vice jaw and a moving vise jaw in the work clamp device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reference vice jaw 2 moving vice jaw 3 support member 4 support member support hole 5 support member 5 a support member rear end face 10 support member locking means 11 a to 12 b lock screw 13 cover plate (part of gantry) 14 adjustment gap 15 wedge-shaped adjustment liner 15a Support member receiving surface 16 Liner advance / retreat driving screw means 17 Screw hole 18 Liner push-out bolt 19 Liner pull-in bolt 20 Vertical hole of support member 21 Horizontal hole of support member 22 Spring receiving member 23 Spring receiving member on mount side 27 Compression Coil spring 28A, 28B One set of front and rear cutting tools for chamfering

Claims (4)

[Claims] 1. A work clamp device for clamping a work to be processed between a reference vice jaw and a movable vice jaw movable in a distance direction with respect to the reference vice jaw,
The reference vice jaw is mounted on a front end of a support member which is supported by the mount so as to be able to move back and forth and is locked at an arbitrary position by a lock means, and a rear end surface of the support member and a mount side support surface facing the rear end surface. A wedge-shaped adjustment liner that can move forward and backward in a direction perpendicular to the direction of movement of the support member is provided in the adjustment gap between them, and a receiving surface on which the rear end surface of the support member comes into contact by moving the adjustment liner forward and backward A work clamp device provided with a liner advance / retreat drive screw means for finely adjusting the position of the support member in the movement direction of the support member. 2. The work clamp device according to claim 1, further comprising a spring for urging the support member in a direction in which a rear end surface thereof is pressed against a receiving surface of the adjustment liner. 3. The support member is provided with a vertical hole at an intermediate position in the movement direction, and a horizontal hole is provided between the vertical hole and a rear end surface of the support member, and a spring is provided at an end of the horizontal hole. A receiving member is mounted, a spring receiving member provided on the gantry side is loosely fitted in the vertical hole, and the spring is provided in a horizontal hole between the spring receiving member and the spring receiving member. The work clamp device according to claim 2. 4. The adjusting liner is provided with an operating end projecting from the adjusting gap and projecting laterally, and the liner advance / retreat clamping screw means penetrates the operating end of the adjusting liner. A liner push-in bolt screwed into a screw hole provided on the mount side facing the operation end; and a mount threaded through the operation end of the adjustment liner and facing the operation end. 2. A liner pull-out bolt having a tip abutting on a side end face.
4. The work clamp device according to any one of claims 1 to 3.