JP4216958B2 - Work clamp device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a workpiece clamping device for fixing a workpiece arranged in a horizontal posture in a vertical posture when machining the workpiece from a horizontal direction.
[0002]
[Prior art]
Normally, various machine tools such as NC machine tools are used to perform various machining on workpieces. At that time, when machining a complicated chamfered part or a request to effectively reduce the size of the apparatus, an apparatus for machining a workpiece from the horizontal direction is used.
[0003]
By the way, when a workpiece is machined by this type of apparatus, it is desired to attach and detach the workpiece in a horizontal posture in consideration of workability. On the other hand, at the time of machining, it is necessary to convert the workpiece into a vertical posture and fix it. For this reason, various clamping devices capable of changing the posture of a fixed workpiece are employed, and for example, a clamping device 1 shown in FIG. 7 is known.
[0004]
The clamp device 1 includes a turning jig 3 on which a work 2 can be placed and turned, and a base member 5 having a vertical jig surface 4 for fixing the work 2, as shown in FIG. After the workpiece 2 is placed in a horizontal posture on the turning jig 3 arranged in a horizontal posture, the turning jig 3 is turned about 90 ° in the direction of the arrow about the turning center 6.
[0005]
[Problems to be solved by the invention]
However, in the clamping device 1 described above, when the workpiece 2 is turned by approximately 90 °, a gap S is formed between the workpiece 2 and the vertical jig surface 4 as shown in FIG. For this reason, the turning jig 3 is moved to the base member 5 side in the vertical posture, and the work 2 is brought into contact with and supported by the vertical jig surface 4. As described above, in the clamping device 1, when the work 2 is arranged on the turning jig 3, the turning jig 3 is moved to the base member 5 side after the turning jig 3 is turned by approximately 90 °. Is required, and the entire clamping operation is complicated.
[0006]
In addition, the turning jig 3 must be configured to be movable toward the base member 5 corresponding to the gap S. As a result, it has been pointed out that the overall configuration of the clamping device 1 is considerably complicated and the equipment cost is increased.
[0007]
The present invention solves this type of problem, and provides a workpiece clamping device capable of efficiently holding a workpiece at a workpiece fixing position by converting the workpiece from a horizontal posture to a vertical posture with a simple operation and configuration. The purpose is to do.
[0008]
[Means for Solving the Problems]
In the workpiece clamping device according to the present invention, when the workpiece is arranged in a horizontal posture with respect to the reference plane for mounting the reversing jig, the reversing jig is provided in the guide groove provided in the guide member and the reversing jig. Under the guiding action with the roller, the workpiece is moved from the workpiece attaching / detaching position to the workpiece fixing position. For this reason, the work for attaching and detaching the workpiece is smoothly performed, and the vertical reference provided at the workpiece fixing position is provided only by converting the reversing jig from the horizontal posture to the vertical posture. The surface is directly abutted and supported.
[0009]
As a result, the work and configuration are simplified at once, compared to the conventional structure in which the reversing work of the reversing jig and the work of moving the reversing jig after reversing are moved to the base member side. Expenses can be effectively reduced.
[0010]
In addition, a pair of guide members are arranged, and two rollers are inserted into substantially L-shaped guide grooves provided in the respective guide members. Therefore, the reversing jig can be easily and smoothly arranged at the workpiece fixing position and the workpiece attaching / detaching position, and workability is effectively improved.
[0011]
Furthermore, when the base member is swung around the horizontal axis via the swiveling means, the work abutting and supported on the vertical reference surface of the base member is rotated, and various processing operations on the work are efficiently performed. To be carried out. Here, since the chips generated when the inner peripheral surface of the workpiece is processed are effectively discharged through the dust collecting means, it is possible to prevent the chips from being scattered.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic perspective explanatory view of a chamfering machine 12 incorporating a workpiece clamping device 10 according to an embodiment of the present invention, and FIG. 2 is a partially cutaway front explanatory view of the chamfering machine 12.
[0013]
On the gantry 14 constituting the chamfering machine 12, the work clamp device 10 is mounted so as to be able to advance and retract in the direction of the arrow X via an X-axis moving mechanism 16, and a cutter device 20 is connected via a Y-axis moving mechanism 18. It is mounted so as to be able to advance and retract in the direction of the arrow Y intersecting the direction of the arrow X. The X-axis moving mechanism 16 includes a pair of X-axis rails 22 that extend in the direction of the arrow X on the gantry 14, and a first motor 24 that is disposed between the X-axis rails 22. A ball screw 26 extending from the first motor 24 in the arrow X-axis direction is screwed into a nut portion 30 provided at the lower portion of the X-axis table 28.
[0014]
A rotary table 32 is placed on the X-axis table 28, and the rotary table 32 includes a turning shaft 36 that can turn around a horizontal axis via a turning motor 34. A base member 38 constituting the work clamp device 10 is fixed to the pivot shaft 36. The base member 38 has a through hole 40 at the center thereof and is formed on a substantially ring, and is provided corresponding to a workpiece fixing position P1 that fixes the workpiece W in a vertical posture. The base member 38 is provided with a plate 42 that is a vertical reference surface on which the workpiece W is abutted and supported in a vertical posture, and a through hole 44 that communicates with the through hole 40 is formed in the plate 42.
[0015]
A pair of left and right guide members 46a and 46b are fixed to the side of the base member 38 on which the plate 42 is provided. As shown in FIGS. 2 to 4, the guide members 46 a and 46 b are configured in a substantially L shape, and substantially L-shaped guide grooves 48 a and 48 b are formed in the side portions facing each other. The guide grooves 48a and 48b extend in the horizontal direction (arrow X direction) and the vertical direction (arrow Z direction), and the reversing jig 50 is attached to the workpiece attachment / detachment position under the guide action of the guide grooves 48a and 48b. It can be freely arranged at P2 and the workpiece fixing position P1.
[0016]
The reversing jig 50 includes a jig plate 52, and the jig plate 52 is provided with an attachment reference surface 54 on which the workpiece W is arranged in a horizontal posture. A fixing jig (not shown) for fixing the workpiece W is provided on the attachment reference surface 54, and arm members 58a and 58b are provided integrally or individually on both sides of the jig plate 52. It is done. A pair of rollers 60a and 60b inserted into the guide grooves 48a and 48b of the guide members 46a and 46b are rotatably supported by the arm members 58a and 58b.
[0017]
The base member 38 and the jig plate 52 are provided with clamping means 62 for pressing and supporting the work W on the reversing jig 50 on the plate 42 at the work fixing position P1. The clamp means 62 includes a clamp arm 66 that can swing about a support shaft 64 on a base member 38, and a ball plunger 68 and a knob 70 are provided at the swing tip of the clamp arm 66.
[0018]
As shown in FIGS. 1 and 2, the jig plate 52 is provided with a fixing knob 72 to which the ball plunger 68 can be engaged. As shown in FIGS. 1 and 2, a through hole 76 is formed in the jig plate 52 so as to correspond to the hole 74 for processing the workpiece W. On the rear end side of the swivel shaft 36, dust collecting means 78 for discharging chips and the like generated during machining of the workpiece W through the swivel shaft 36 is provided. The dust collecting means 78 includes a fixed cylinder 80 disposed so as to cover the end of the pivot shaft 36, and a bellows pipe 82 having one end externally attached to the cylinder 80 and the other end connected to a dust collector (not shown). And.
[0019]
Similarly to the X-axis moving mechanism 16, the Y-axis moving mechanism 18 is disposed between a pair of Y-axis rails 84 that are fixed on the gantry 14 in the direction of the arrow Y and the pair of Y-axis rails 84. A second motor 86. On the Y-axis rail 84, a Y-axis table 88 is provided that can be moved back and forth in the direction of the arrow Y via a ball screw 87 connected to the second motor 86.
[0020]
A cutter device 20 is mounted on the Y-axis table 88, and a chamfering tool 92 is mounted on the tip of the cutter body 90. The workpiece W is, for example, a motorcycle single cylinder cylinder block, and the chamfering process is performed on the inner peripheral surface of the hole 74 via a chamfering tool 92.
[0021]
The operation of the workpiece clamping device 10 configured as described above will be described below in relation to the chamfering machine 12.
[0022]
First, as shown in FIG. 4, the reversing jig 50 is disposed in a horizontal posture (work attachment / detachment position P2). Therefore, when the workpiece W is arranged in a horizontal posture with respect to the attachment reference plane 54, the workpiece W is fixed via a fixing jig (not shown). Next, the operator holds the fixing knob 72 and changes the posture of the reversing jig 50 from the horizontal posture to the vertical posture (see FIG. 5).
[0023]
At that time, a pair of rollers 60a and 60b are supported on both sides of the reversing jig 50 via arm members 58a and 58b, respectively, and the rollers 60a and 60b are substantially formed on the guide members 46a and 46b. It is inserted into the L-shaped guide grooves 48a and 48b. Therefore, when the reversing jig 50 is changed from the horizontal posture to the vertical posture, the workpiece W is fixed from the workpiece attaching / detaching position P2 under the guiding action of the pair of rollers 60a, 60b and the guide grooves 48a, 48b. The workpiece W is moved to the position P1, and the workpiece W is brought into direct contact with the plate 42 which is a vertical reference plane. That is, the workpiece W is changed in posture from a horizontal posture to a vertical posture along an arcuate locus as shown by a two-dot chain line in FIG.
[0024]
Thus, in this embodiment, the operator only has to operate the jig plate 52 from the horizontal posture to the vertical posture. After the workpiece W is rotated to convert from the horizontal posture to the vertical posture, the workpiece W is moved to the plate. Compared to the conventional structure in which the linear movement is made to the 42 side, the work is facilitated, and the entire structure of the work clamping device 10 is simplified and miniaturized.
[0025]
After the workpiece W is abutted and supported by the plate 42, the operator swings the clamp arm 66 constituting the clamp means 62 toward the jig plate 52, and a ball plunger 68 provided at the tip of the swing. Is engaged with the fixing knob 72 of the jig plate 52 (see FIG. 6). For this reason, the workpiece W is firmly held by the base member 38 via the clamp means 62 and is accurately positioned and fixed in the vertical posture via the plate 42.
[0026]
The chamfering tool constituting the cutter device 20 is controlled by driving the first and second motors 24 and 86 constituting the X-axis moving mechanism 16 and the Y-axis moving mechanism 18 in a state where the work W is supported at the work fixing position P1. 92, a predetermined chamfering process is performed on the inner peripheral surface of the hole 74 of the workpiece W. Here, the base member 38 is fixed to the turning shaft 36, and the workpiece W turns integrally with the base member 38 under the drive action of the turning motor 34, and a predetermined portion of the workpiece W is a chamfering tool. Is positioned corresponding to 92. Therefore, there is an advantage that the desired chamfering of the workpiece W is smoothly and efficiently performed by the chamfering tool 92.
[0027]
At that time, a dust collector (not shown) that constitutes the dust collecting means 78 is driven, the inside of the swivel shaft 36 is sucked through the bellows tube 82, and chips generated on the tip end side of the swivel shaft 36 are removed from the bellows. It is sucked into the tube body 82 and discharged to the outside. As a result, chips and dust are not scattered in the work place, and the work environment can be effectively maintained.
[0028]
【The invention's effect】
In the work clamping device according to the present invention, when the work is arranged in a horizontal posture on the reversing jig and then the reversing jig is converted into a vertical posture, the guide groove provided in the guide member and the reversing jig The reversing jig moves to the workpiece fixing position under the guiding action with the rollers provided on the workpiece and directly supports the workpiece against the vertical reference plane provided at the workpiece fixing position. For this reason, the work reversing operation can be performed easily and smoothly, and the configuration of the entire work clamping device can be simplified and miniaturized at once.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a chamfering machine incorporating a work clamp device according to an embodiment of the present invention.
FIG. 2 is a partially cutaway front explanatory view of the chamfering machine.
FIG. 3 is an exploded perspective view of a main part of the work clamp device.
FIG. 4 is an operation explanatory diagram in a state in which a workpiece is arranged in the workpiece clamping device.
FIG. 5 is an operation explanatory diagram when the workpiece is converted from a horizontal posture to a vertical posture.
FIG. 6 is an operation explanatory diagram when the workpiece is fixed in a vertical posture.
FIG. 7 is an explanatory diagram of a schematic configuration of a clamping device according to a conventional technique.
FIG. 8 is an operation explanatory view of the conventional clamping device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Work clamp apparatus 12 ... Chamfering machine 16 ... X-axis moving mechanism 18 ... Y-axis moving mechanism 20 ... Cutter apparatus 28 ... X-axis table 36 ... Turning axis 38 ... Base member 42 ... Plate 46a, 46b ... Guide member 48a, 48b ... guide groove 50 ... reversing jig 52 ... jig plate 54 ... mounting reference surface 60a, 60b ... roller 62 ... clamp means 66 ... clamp arm 74 ... hole 78 ... dust collecting means 92 ... chamfering tool

Claims (4)

A workpiece clamping device for fixing the workpiece in a vertical posture at a workpiece fixing position after the workpiece is arranged at a workpiece attachment / detachment position in a horizontal posture in order to process the workpiece from a horizontal direction;
A reversing jig having a mounting reference surface on which the workpiece is arranged in a horizontal posture;
A base member provided at the work fixing position and having a vertical reference surface on which the work is abutted and supported in a vertical posture;
A roller provided in the reversing jig;
A guide member having a guide groove into which the roller is inserted, and a guide member capable of disposing the reversing jig at the work attaching / detaching position and the work fixing position under the guide action of the roller and the guide groove;
Clamping means for pressing and supporting the workpiece on the reversing jig on the vertical reference plane at the workpiece fixing position;
A workpiece clamping device comprising: In the work clamp device according to claim 1, a pair of the guide members are arranged to face each other,
The work clamp device, wherein the guide groove provided in each guide member is set to be substantially L-shaped, and two rollers are inserted into the guide groove. 3. The work clamping apparatus according to claim 1, further comprising a turning means for turning the base member around a horizontal axis. The workpiece clamping device according to any one of claims 1 to 3, wherein the workpiece is a cylindrical member having an inner peripheral surface for processing,
A work clamping device comprising dust collecting means for discharging chips generated when the inner peripheral surface is processed.

Images