JP2010179390A - Clamp device and clamp method for flat thin plate-like work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp device of a flat thin plate-like work, which can easily avoid an interference with a working tool. <P>SOLUTION: The clamp device 1 for working the front and back surfaces of the work W having a flat thin plate-like shape by a double-end working machine includes a holder plate 2 provided upright on a base 1a, a through-hole 2a formed in the holder plate 2 for fitting and supporting the work, engaging parts (31, 32) provided on the holder plate 2 so as to face the through-hole 2a to butt against and hold the ends W1 and W2 of the work W, and urging means 4 (41, 42) for urging the work W to be pressed to the engaging parts 3 (31, 32). The urging means 4 (41, 42) urge the work W in a direction along the front and back surfaces to be clamped. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a workpiece clamping device and a clamping method having a thin flat plate shape, and more particularly, to a clamping device and a clamping method for urging and clamping a workpiece in a direction along the front and back surfaces.

  When machining the front and back surfaces of a workpiece with a thin flat plate shape by cutting, etc., it is required to ensure flatness while avoiding interference between the workpiece and the cutting tool, so various clamping devices have been devised. (For example, Patent Document 1).

  In the technique described in Patent Document 1, the main clamp and the natural clamp that clamp the thickness direction of the workpiece are appropriately disposed, and the clamp support pressure is controlled while measuring the flatness of the workpiece. Secure.

Japanese Patent Laid-Open No. 10-202456 (Claims, FIGS. 2 and 3)

  However, when the main clamp and the natural clamp that clamp the workpiece thickness direction are provided as in Patent Document 1, the clamping device and the processing tool are likely to interfere with each other. Therefore, the surface has to be processed by releasing the clamp, reversing the workpiece, and then re-clamping, which causes a problem in terms of processing accuracy and processing time.

  In addition, when a control means for controlling the clamp support pressure is provided while measuring the flatness of the workpiece, a separate measuring device and control device are required, so there is a concern that the overall size of the clamping device may increase. .

  The present invention has been made in view of such a background, and provides a workpiece clamping device and a clamping method having a thin flat plate shape that can easily avoid interference with a machining tool and reduce machining time. The issue is to provide.

  In order to solve the above-mentioned problems, the invention according to claim 1 is a clamping device for processing the front and back surfaces of a workpiece having a flat plate shape with a double-headed processing machine, and a holder plate erected on a base, A through hole formed in the holder plate for fitting and supporting the workpiece, a locking portion provided in the holder plate so as to face the through hole, and abutting and holding the end of the workpiece, and the locking Urging means for pressing the work against the part, wherein the urging means is configured to urge and clamp the work in a direction along the front and back surfaces.

  According to the first aspect of the present invention, when machining with a double-headed machine, the machining component force (back component force) acting on the back surface of the workpiece surface is applied in a direction that cancels each other, thereby reducing the clamping force. can do. For this reason, since it becomes easy to simplify a clamp apparatus and to avoid interference with a workpiece | work and a processing tool, it is especially suitable for such a process. Furthermore, the processing time can be further shortened by processing the back surface and the front surface of the workpiece simultaneously.

  In addition, since the workpiece is inserted into and supported by the through hole formed in the holder plate, a gap can be provided between the peripheral portion of the workpiece and the holder plate, so that it is easy to avoid interference between the workpiece and the processing tool. Become.

  And it becomes easy to avoid interference with a clamp apparatus and a processing tool by abutting a latching | locking part on the end surface of a workpiece | work, and clamping using the end surface of a workpiece | work. For this reason, since processing of the front and back surfaces is possible without re-clamping, the number of processing steps can be reduced and the processing time can be shortened. For example, by making the thickness of the locking part or holder plate smaller than the thickness of the workpiece so that the locking part and the holder plate do not protrude from the front and back surfaces of the work, interference between the work and the processing tool is avoided. It is even easier to do.

  Further, the biasing means biases the workpiece in a direction along the front and back surfaces (direction parallel to the front and back surfaces) to the locking portion, thereby making the stress state of the front surface and the back surface uniform during processing and By applying a compressive force in the direction along the front and back surfaces of the workpiece and suppressing the bending of the workpiece during processing, the workpiece can be stably and firmly held.

  The invention according to claim 2 is characterized in that the joint portion between the base and the holder plate according to claim 1 is provided with a reinforcing rib in a direction in which the fall of the holder plate is regulated.

  According to such a configuration, it is possible to effectively suppress vibration and chatter during processing by providing the reinforcing ribs to ensure the falling rigidity of the holder plate. Further, the thickness of the holder plate can be reduced, which is suitable for avoiding interference between the workpiece and the holder plate.

  The invention according to claim 3 is the clamping device according to claim 1 or 2, wherein the holder plate is provided on the holder plate so as to face the through hole, and the work is brought into contact with the locking portion. It further comprises positioning means for urging and moving.

  According to this configuration, the positioning means is provided and the work is reliably brought into contact with the locking member, so that the positioning accuracy can be improved and the work can be stably clamped by the biasing means.

  The invention according to claim 4 is the clamp device according to any one of claims 1 to 3, wherein the locking portion is provided so as to abut against a lower end portion of the workpiece. A direction locking portion and a horizontal direction locking portion provided so as to abut against the side end portion of the workpiece, and the biasing means generates a biasing force from above to below the workpiece. And a sub clamper provided on the holder plate so as to face the through hole in order to compensate for the biasing force of the main clamper.

  According to this configuration, the main clamper generates a biasing force from the upper side toward the lower vertical direction locking portion while stably supporting the workpiece by the vertical locking portion and the horizontal locking portion. Thus, for example, a horizontally long workpiece can be stably clamped.

  Further, by providing a sub clamper in addition to the main clamper, it is possible to diversify the clamping position and the direction of the clamping force, and to flexibly deal with workpieces having various shapes.

  The invention according to claim 5 is the clamp device according to claim 4, wherein the sub clamper includes a clamp rod that reciprocally moves by a fluid drive cylinder, and a biasing force by the sub clamper is provided at a tip portion of the clamp rod. It is characterized in that a wedge-shaped portion for adjusting the orientation of is formed.

  According to such a configuration, by pressing the wedge-shaped portion against the workpiece, a pressing force is applied in an appropriate direction by the pressing component force generated from the wedge shape, and the workpiece can be reliably clamped in a balanced manner.

  The invention according to claim 6 is the clamping device according to claim 1, wherein the holder plate is provided on the holder plate so as to face the through hole, and supports the front side or the back side in the front and back direction of the workpiece. A direction support portion is provided.

  According to such a configuration, the front and back direction support portions facilitate positioning, for example, when a workpiece is fitted into the holder plate, and can contribute to automation of loading. Furthermore, it becomes possible to more effectively suppress vibrations and the like by supporting the machining force (back force) during machining that acts in the thickness direction of the workpiece.

  The invention according to claim 7 is the clamping device according to claim 6, wherein the front and back direction support portions are provided at positions where they contact a concave surface formed at an edge of the workpiece. And

  According to this configuration, it is possible to prevent the front and back direction support portions from protruding from the surface of the workpiece by abutting against the concave surface formed on the edge of the workpiece, and avoid interference between the workpiece and the processing tool. can do.

  The invention according to an eighth aspect is the clamping device according to any one of the first to seventh aspects, wherein the workpiece is a main valve body that is a hydraulic control component for a driving force transmission device of a vehicle. It is characterized by being.

  According to such a configuration, the main valve body generally has a thin plate shape, is generally rectangular or L-shaped in plan view, has a short side of about 150 to 250 mm, and a long side of about 300 to 400 mm. In addition, since the plate thickness is configured with a size of about 20 to 30 mm, it has a shape suitable for urging and clamping the workpiece in the direction along the front and back surfaces of the locking portion. For this reason, the workpiece having a shape like the main valve body is a workpiece that is suitable for shortening the machining time by simultaneously machining the back surface and the surface of the workpiece while avoiding interference between the workpiece and the machining tool. .

  The invention according to claim 9 is a workpiece clamping method for processing the front and back surfaces of a workpiece having a thin flat plate shape with a double-headed machine, wherein the through hole formed in a holder plate erected on a base A step of inserting the workpiece and supporting the workpiece; a step of moving the workpiece so that an end portion of the workpiece contacts an engaging portion provided on the holder plate so as to face the through hole; And a step of urging and clamping the workpiece in a direction along the front and back surfaces to the stop portion.

  According to such a configuration, it is possible to easily avoid interference between the clamping device and the processing tool by urging and clamping the workpiece in the direction along the front and back surfaces of the locking portion. For this reason, since processing of the front and back surfaces is possible without re-clamping, the number of processing steps can be reduced and the processing time can be shortened. Then, the workpiece is urged in a direction along the front and back surfaces of the engaging portion, and a compressive force is applied in a direction along the front and back surfaces of the workpiece to suppress the bending of the workpiece, thereby stably and firmly supporting the workpiece. Can be held.

  The invention according to claim 10 is the workpiece clamping method according to claim 9, wherein the front and back surfaces of the workpiece are processed simultaneously by a double-headed processing machine.

  According to the invention which concerns on Claim 10, by processing with a double-headed processing machine, the processing component force (back component force) which acts on the back surface of a to-be-processed surface is made to act in the direction which mutually cancels, Therefore Processing accuracy can be maintained. . Furthermore, the processing time can be further shortened by processing the back surface and the front surface of the workpiece simultaneously.

  The workpiece clamping device and the clamping method having a thin flat plate shape according to the present invention can easily avoid the interference with the machining tool, and can shorten the machining time.

It is a perspective view which shows the whole structure of the clamp apparatus which concerns on embodiment of this invention, and looks at the surface of a workpiece | work. It is a perspective view which shows the whole structure of the clamp apparatus which concerns on embodiment of this invention, and looks at the back surface of a workpiece | work. It is a front view showing typically the composition of the clamp device concerning the embodiment of the present invention, and looks at the surface of a work. It is a rear view which shows typically the composition of the clamp device concerning the embodiment of the present invention, and looks at the back of the work. It is a side view which shows the structure of the clamp apparatus which concerns on embodiment of this invention. It is a front view which shows typically the structure of the wedge shape part of a sub clamper in the clamp apparatus which concerns on embodiment of this invention. It is XX sectional drawing of FIG. 1 which shows the structure of the front and back support part which concerns on the modification of this invention.

  An embodiment of the present invention will be described in detail mainly with reference to FIGS.

  As shown in FIG. 1, a clamping device 1 for a workpiece W according to an embodiment of the present invention includes a holder plate 2 erected on a base 1 a, and a workpiece W formed on the holder plate 2 to support the workpiece W. A through hole 2a, a side stopper 3 (31, 32) that is a locking portion that holds and abuts against the ends W1 and W2 of the workpiece W, and a main biasing means 4 that presses the workpiece W against the side stopper 3 A clamper 41 and a sub-clamper 42, a position plunger 5 as positioning means provided on the holder plate 2 so as to face the through hole 2a, and an air introduction port through which pressure air as a driving source is supplied from an external device (not shown) 1b.

  The clamping device 1 avoids interference between the machining tool F and the workpiece W when machining the front and back surfaces of the workpiece W having a flat plate shape simultaneously with a double-headed machine (milling machine or polishing machine, see FIG. 5). Therefore, it is particularly suitable as a clamping device in such a case.

  For example, the workpiece W is a main valve body having a thin flat plate shape. The main valve body is a hydraulic control component in which a hydraulic circuit (not shown) used for controlling an automatic transmission or the like that is a driving force transmission device of a vehicle is formed.

  The main valve body is generally rectangular or L-shaped in plan view, has a short side of about 150 to 250 mm, a long side of about 300 to 400 mm, and a plate thickness of about 20 to 30 mm. Composed.

  As will be described below, the workpiece W made of a thin flat plate targeted by the present invention is particularly suitable for a thin plate having a flat thickness of about several tens of millimeters.

  As shown in FIG. 1, the holder plate 2 needs to have an external size having a width and a length that allows the workpiece W to be firmly held by being inserted into the through hole 2 a, but as shown in FIG. 5, the holder plate 2 The plate thickness of 2 is set to be thinner than the plate thickness of the workpiece W. With this configuration, it is possible to easily avoid interference with the processing tool (milling F) when processing with a double-headed processing machine (not shown) (see FIG. 5).

  Further, as shown in FIG. 1, the joint portion between the holder plate 2 and the base 1 a is provided with reinforcing ribs 1 c in a direction in which the holder plate 2 is prevented from falling.

  According to such a configuration, by securing the falling rigidity of the holder plate 2 by the reinforcing ribs 1c, vibration and chatter during processing can be effectively suppressed. Moreover, it becomes possible to reduce the plate | board thickness of the holder plate 2, and it becomes easy to avoid the interference with the processing tool F and the holder plate 2. FIG.

  In the present embodiment, the thickness of the holder plate 2 is made thinner than the thickness of the workpiece W. However, the present invention is not limited to this. For example, the thickness of the holder plate 2 is the periphery of the through hole 2a. Only the thickness of the portion may be reduced, or interference may be avoided by reducing the thickness of the side stopper 3 (31, 32). According to this configuration, the rigidity of the holder plate 2 can be ensured while avoiding interference with the processing tool F.

  As shown in FIG. 3, the through hole 2 a is formed in a hole shape so that the outer size of the workpiece W can be accommodated with a margin. Thus, by forming the through hole 2a with a margin more than the outer size of the workpiece W, a gap is provided between the peripheral portion of the workpiece W and the holder plate 2 (the inner peripheral portion of the through hole 2a). Interference with the processing tool F (FIG. 5) can be avoided as much as possible.

  As shown in FIG. 1, the side stoppers 3 (31, 32) are provided at three locations, two side stoppers 31 that are vertical locking portions, and a side stopper 32 that is a horizontal locking portion, It consists of

  And the side stopper 31 is provided so that it may contact | abut to the lower end surface W1 of the workpiece | work W, and the side stopper 32 is provided so that it may contact | abut to the side part end surface W2 (left side end surface in this figure). ing.

  In the present embodiment, the side stoppers 3 (31, 32) are provided at three locations. However, the present invention is not limited to this, and according to the shape of the workpiece W so that the workpiece W can be stably held. Set the quantity and location as appropriate.

  As shown in FIGS. 1 and 2, the side stopper 3 (31, 32) has a lateral L-shape, and is fitted into the holder plate 2 so as to face the through hole 2a and is fixed with bolts. As shown in FIGS. 3 and 4, the tip portions 31a and 32a of the side stopper 3 are disposed so as to contact the lower end surface W1 and the side end surface W2 of the workpiece W, respectively.

  In the present embodiment, the workpiece W is accommodated in the through hole 2a so that the longitudinal direction of the substantially rectangular shape ascends to the right shoulder as viewed from the surface so that the workpiece W can sit down with respect to the side stopper 3. However, the present invention is not limited to this, and can be set as appropriate in consideration of the relationship with the side stopper 3.

  As shown in FIG. 1, the main clamper 41 is configured by disposing a fluid cylinder (hydraulic or pneumatic cylinder) on a cylinder plate 21 fixed to the upper part of the holder plate 2.

  With this configuration, by disposing the upper portion of the holder plate 2 without being affected by the plate thickness of the holder plate 2, it is easy to secure a relatively large space, so that a clamping force larger than that of the sub clamper 42 can be stably generated. Further, by making the basic layout common, the manufacturability of the clamping device 1 can be improved.

  The main clamper 41 is disposed at two locations on both sides obliquely above the workpiece W in order to clamp with good balance. Specifically, the main clamper 41 has a left main clamper 41 </ b> L that generates a biasing force from the diagonally upper left side of the workpiece W toward the diagonally lower right side as viewed from the surface (see FIG. 1), and the diagonally upper right side of the workpiece W. And a right main clamper 41R that generates an urging force obliquely downward to the left.

  As shown in FIG. 1, the main clamper 41 slidably inserts a clamp shaft 41a connected to a piston (not shown) of a fluid cylinder into the holder plate 2 so that the tip of the clamp shaft 41a is placed on the workpiece. By contacting the upper end face W3, the work W is pressed against the side stopper 3 (31, 32) and clamped.

  In the present embodiment, the tip of the clamp shaft 41a is clamped by contacting the upper end surface W3 of the workpiece W. However, the present invention is not limited to this, and the side end surface W2 and the corner portion (sub-clamper) of the workpiece W are not limited thereto. 42 position). In short, an appropriate position of the clamp position is determined in consideration of the shape of the workpiece W, the clamping force, and the like as appropriate.

  As an example, as shown in FIG. 3, the sub-clamper 42 is provided at three locations, and is disposed at the upper left portion of the work W, and generates an urging force from the upper left oblique direction to the lower right oblique direction of the work W. 42L, an upper right sub-clumper 42R that is disposed in the upper right part of the work and generates a biasing force from the upper right to the lower left of the work, and the lower part of the work W. And a lower sub-clamper 42B that generates an urging force toward it.

  The sub clamper 42 is formed as a fluid cylinder including, for example, a piston 42b that is formed in the holder plate 2 and reciprocates in the cylinder 42a, and a clamp rod 42c that is connected to the piston 42b. Then, the piston 42b is connected via a control valve (not shown) with the pressure air supplied from the air inlet 1b (FIG. 1) via a flow path (not shown) formed in the holder plate 2 as a drive source. Move back and forth.

  With this configuration, the tip end of the clamp rod 42c is brought into contact with the corner end surface of the workpiece W and urged, and the clamping force of the main clamper 41 is supplemented to diversify the clamping position and the direction of the clamping force. It is possible to flexibly correspond to the workpiece W having the shape.

  As described above, the main clamper 41 and the sub clamper 42 are appropriately provided at predetermined positions, and the clamping forces of the main clamper 41 and the sub clamper 42 are collectively gathered so that an appropriate biasing force is appropriately applied to various workpiece shapes. Can be given by position and orientation.

  It should be noted that the arrangement of the main clamper 41 and the sub clamper 42 and the magnitude and direction of the clamping force are appropriately determined by trial machining the workpiece W while adjusting the clamping force on a trial basis during the trial. In this case, it is determined in consideration of the machining stress remaining on the workpiece W, the amount of bending when a clamping force is applied, the machining allowance (machining allowance) by the machining tool F (FIG. 5), the resonance frequency, and the like.

  Here, a modified example of the sub clamper which is the urging means in the embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to the above-mentioned sub clamper 42, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 6, the sub-clamper 42 'according to the modification of the present invention includes a wedge-shaped portion 42d having an inclined surface at the tip end portion of the clamp rod 42c. And by making it contact | abut to the circular-arc-shaped convex part W4 formed in the side part end surface W2 of the workpiece | work W, the direction f1 (horizontal direction) along the moving direction of the clamp rod 42c, and the direction f2 orthogonal to the said moving direction (Vertical) clamping force can be applied.

  Therefore, the direction of the urging force (clamping force) by the sub clamper 42 ′ can be appropriately adjusted according to the shape of the workpiece W, the position of the main clamper 41, and the like.

  In the present modification, the tip of the clamp rod 42c has a wedge shape. However, the present invention is not limited to this, and the clamp rod 42c is formed in a spherical shape so as to hit a spot or is formed in accordance with the end surface shape of the workpiece W. Or the direction of the clamping force can be adjusted by appropriately setting.

  As shown in FIG. 1, the position plunger 5 is disposed at two locations, and includes a position plunger 5V that mainly performs positioning in the vertical (up and down) direction and a position plunger 5H that mainly performs positioning in the horizontal (left and right) direction. I have.

  The position plunger 5 has a function of urging and positioning the workpiece W so as to contact the side stopper 3.

  Specifically, the position plunger 5 </ b> V positions the workpiece W so as to urge the workpiece W from the upper side to the lower side so as to contact the side stopper 31. On the other hand, the position plunger 5H positions the work W so as to urge the work W from the right side to the left side in FIG.

  For example, although not shown, the position plunger 5 can be configured such that a plunger (not shown) that reciprocates in the cylinder is urged in a protruding (extending) direction by an urging means such as a coil spring. A control valve (not shown) is driven by pressure air supplied from the air inlet 1b through a flow path (not shown) formed in the holder plate 2 without using a biasing means such as a coil spring. ) To move the plunger back and forth.

  The air inlet 1b is formed on the left and right side surfaces of the base 1a and the holder plate 2, as shown in FIGS. Then, compressed air is supplied to the air inlet 1b from an external device via an air pipe (not shown). The compressed air supplied to the air introduction port 1b is supplied to pneumatic equipment such as the sub-clamper 42 that operates with compressed air through a passage (not shown) formed in the base 1a and the holder plate 2.

  Next, a workpiece clamping method when machining the front and back surfaces of the main valve body (work W) having a thin flat plate shape using the clamping device 1 according to the embodiment of the present invention with a double-headed machine will be described.

  The method for clamping the workpiece W according to the embodiment of the present invention includes a step of supporting the workpiece W by inserting the workpiece W into the through hole 2a formed in the holder plate 2 erected on the base 1a, and the through hole 2a. The step of moving the workpiece W so that the end of the workpiece W comes into contact with the side stopper 3 (31, 32) provided on the holder plate 2 so as to face the workpiece, and the workpiece W is displayed on the side stopper 3 (31, 32). And a step of urging and clamping in a direction along the back surface.

  Specifically, the workpiece W is held by the transfer robot and supported in a state of being fitted into the through hole 2a of the holder plate 2 (step of supporting the workpiece W), and the lower end surface W1 of the workpiece W by the position plunger 5 and The side end face W2 is moved and positioned so as to contact the side stopper 3 (31, 32) (positioning step).

  With the positioning in this way, the main clamper 41 and the sub clamper 42 are operated and clamped (clamping process). And in the state which clamped the workpiece | work W, the front and back of the workpiece | work W can be simultaneously processed with a double-headed processing machine (refer FIG. 5).

  According to the workpiece W clamping method using the clamping device 1 according to the embodiment of the present invention, the following operational effects are obtained.

  That is, by processing with a double-headed processing machine (see FIG. 5), the clamping force can be reduced by causing the machining component forces (back component forces) acting on the back surface of the workpiece surface to cancel each other. it can. For this reason, it becomes easy to simplify the clamp apparatus 1 and to avoid interference with the workpiece | work W and the processing tool F (FIG. 5). And since the back surface and surface of the workpiece | work W can be processed simultaneously, processing time can be shortened.

  In addition, since the workpiece W is inserted into and supported by the through-hole 2a formed in the holder plate 2, a gap can be provided between the peripheral portion of the workpiece W and the holder plate 2, so that the workpiece W and the processing tool F can be provided. It is easy to avoid interference.

  Then, the side stopper 3 (31, 32) is abutted against the end faces W1, W2 of the workpiece W, and is clamped by using the end faces W1, W2 of the workpiece W, whereby interference between the clamping device 1 and the processing tool F is caused. It can be easily avoided. For this reason, since processing of the front and back surfaces is possible without re-clamping, the number of processing steps can be reduced and the processing time can be shortened. For example, since it becomes possible to make the thickness of the locking portion or the holder plate 2 smaller than the thickness of the workpiece W (see FIG. 5), the side stoppers 3 (31, 32) and the holder plate 2 are the surface of the workpiece W. By not projecting from the back surface, it becomes easy to avoid interference between the workpiece W and the processing tool F.

  Further, the main clamper 41 and the sub clamper 42 urge the workpiece W toward the side stoppers 3 (31, 32) in the direction along the front and back surfaces, thereby making the stress state of the front surface and the back surface equal to each other during processing. By applying a compressive force in a direction along the front and back surfaces of the workpiece and suppressing bending of the workpiece W during processing, the workpiece W can be stably and firmly held.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications.

  For example, in the above-described embodiment, the side stoppers 3 (31, 32) are provided at three places as the locking portions. However, as shown in FIG. The direction support portion 6 (61, 62) can be provided on the holder plate 2 so as to face the through hole 2a. FIG. 7 to be referred to is a cross-sectional view taken along the line XX of FIG. 1 showing the configuration of the front and back direction support portion according to the modification of the present invention, and shows the upper part of the work in a state where the work is accommodated in the through hole of the holder plate The periphery of the end face and the lower end face is shown.

  The front and back direction support part 6 can be constituted by a back side support part 61 that supports the back side and a front side support part 62 that supports the front side.

  As shown in FIG. 7, the back surface side support portion 61 is, for example, a back surface side formed on the holder plate 2 on a concave surface W10 formed one step lower than the work back surface formed on the lower end surface W1 that is an edge of the work W. The workpiece W is supported from the back side by the support surface 61a.

  As an example, the surface-side support portion 62 of the workpiece W can be configured by forming a surface-side support surface 62a at the tip of the clamp shaft 41a of the main clamper 41 (41R). Then, the surface side support surface 62a is brought into contact with the concave surface W30 formed one step lower than the work surface formed on the upper end surface W3 of the work W, thereby supporting the work W from the surface side.

  As described above, the front and back direction support portions 6 (61 and 62) are provided at positions where the front and back surface support portions 6 (61 and 62) are in contact with the concave surfaces W10 and W30 formed at the edges of the workpiece W. Can be prevented from projecting from the surface of the workpiece W, and interference with the workpiece W can be easily avoided.

  In this embodiment, the case where the front and back surfaces of the workpiece W are machined by a double-headed machine has been described. However, the present invention is not limited to this, and the present application can be applied even when machining one side at a time. it can.

  In the present embodiment, the case where the workpiece W is the main valve body has been described. However, the present invention is not limited to this, and the workpiece W can be similarly applied to the workpiece W having a thin plate deformation shape having the same shape. it can.

  In the present embodiment, the case where the workpiece W has a substantially rectangular shape has been described. However, the present invention is not limited to this, and the end surface shape of the workpiece W is not limited to this. It can be similarly applied by appropriately considering the position and shape of the side stopper 3 according to the above.

DESCRIPTION OF SYMBOLS 1 Clamp apparatus 1a Base 1b Air inlet 1c Reinforcement rib 2 Holder plate 2a Through hole 3 (31, 32) Side stopper (locking part)
31 Side stopper (up and down direction locking part)
32 Side stopper (horizontal locking part)
4 Biasing means 5 (5H, 5V) Position plunger (positioning means)
6 Front and back direction support part 41 Main clamper (biasing means)
42, 42 'Sub clamper (biasing means)
42d Wedge-shaped part 61, 62 Back side support part (front and back direction support part)
F Milling (processing tool)
W Work W1 Lower end face (work end)
W2 side end face (work end)
W3 Upper end face (work edge)

Claims (10)

A clamping device for processing the front and back surfaces of a workpiece consisting of a thin flat plate with a double-headed processing machine,
A holder plate erected on the base;
A through hole formed in this holder plate for supporting the workpiece by fitting,
An engaging portion that is provided on the holder plate so as to face the through-hole and is held against the end of the workpiece,
Urging means for pressing the workpiece against the locking portion,
The work urging means is configured to urge and clamp the work in a direction along the front and back surfaces.   The clamp device according to claim 1, wherein a reinforcing rib is provided at a joint portion between the base and the holder plate in a direction in which the holder plate is prevented from falling. A positioning means that is provided on the holder plate so as to face the through-hole and moves the work piece so as to abut on the locking portion;
The clamping device according to claim 1, wherein: The locking portion includes a vertical locking portion provided so as to abut against a lower end portion of the workpiece, and a horizontal locking portion provided so as to abut on a side end portion of the workpiece. Prepared,
The biasing means includes a main clamper that generates a biasing force from the upper side to the lower side of the workpiece, and a sub clamper provided on the holder plate so as to face the through hole in order to compensate for the biasing force of the main clamper. The clamping device according to any one of claims 1 to 3, further comprising: The sub clamper includes a clamp rod that reciprocates by a fluid drive cylinder,
The clamp device according to claim 4, wherein a wedge-shaped portion that adjusts a direction of an urging force by the sub clamper is formed at a distal end portion of the clamp rod. Provided with a front and back support portion that is provided on the holder plate so as to face the through hole and supports the front side or the back side of the workpiece;
The clamping device according to claim 1, wherein: The front and back direction support portion is provided at a position in contact with a concave surface formed at an edge of the workpiece;
The clamping device according to claim 6.   The clamp device according to any one of claims 1 to 7, wherein the work is a main valve body which is a hydraulic control part for a driving force transmission device of a vehicle. A workpiece clamping method for processing the front and back surfaces of a workpiece consisting of a thin flat plate with a double-headed machine,
Inserting the workpiece into a through hole formed in a holder plate erected on the base and supporting the workpiece;
Moving and positioning the workpiece so that the end of the workpiece comes into contact with the engaging portion provided on the holder plate so as to face the through hole; and
Urging and clamping the workpiece in the direction along the front and back surfaces to the locking portion; and
A method for clamping a workpiece having a thin flat plate shape.   The workpiece clamping method according to claim 9, wherein the front and back surfaces of the workpiece are processed simultaneously by a double-headed processing machine.

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