Workpiece clamping device

Abstract

The invention discloses a workpiece clamping device, relates to the technical field of machining, and aims to solve the technical problems that in the prior art, a thin-wall workpiece is unstable in clamping and is easily crushed or deformed when being clamped by a clamp. The workpiece clamping device comprises a clamping block and a supporting seat, the clamping block is bonded with a workpiece, and the clamping block is connected with the supporting seat. The supporting seat comprises a fixing part, a supporting part and a bottom plate, the bottom plate is connected with the fixing part through the supporting part, and the fixing part is fixedly connected with the clamping block. According to the workpiece clamping device, the situation that the surface of a workpiece is crushed when a traditional clamp is used is avoided, and meanwhile the risk that clamping is unstable due to the fact that the workpiece is thin is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a workpiece clamping device. Background Art

[0002] With the emergence of technologies such as 3D printing, thin-wall processing technology has been further developed. Thin-walled workpieces have the advantages of light weight, material saving, and good thermal conductivity, and are widely used in the fields of aerospace, automotive industry, and electronic equipment.

[0003] In the prior art, thin-walled workpieces are difficult to clamp during processing due to their thin wall thickness. Existing clamps are unstable when clamping thin-walled workpieces, which can easily cause the thin-walled workpieces to be crushed or deformed. Summary of the invention

[0004] In view of the above analysis, the present invention aims to provide a workpiece clamping device to solve the technical problem in the prior art that the clamping of thin-walled workpieces by the clamp is unstable and easily causes the thin-walled workpiece to be crushed or deformed.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions:

[0006] The invention discloses a workpiece clamping device, comprising a clamping block and a supporting seat, wherein the clamping block is bonded to the workpiece, and the clamping block is connected to the supporting seat.

[0007] Furthermore, the support seat includes a fixing portion, a supporting portion and a bottom plate, the bottom plate is connected to the fixing portion through the supporting portion, and the fixing portion is fixedly connected to the clamping block.

[0008] Furthermore, the clamping block includes a block body and a connecting portion, one end of the block body is bonded to the workpiece, and the other end of the block body is connected to the connecting portion, and the connecting portion is connected to the fixing portion.

[0009] Furthermore, the clamping block further comprises a rubber groove, and the rubber groove is arranged on the end surface where the block is connected to the workpiece.

[0010] Furthermore, the clamping block is connected to the supporting seat to form a fixing unit, and the fixing unit is provided in plurality.

[0011] Furthermore, a threaded hole is provided on the connecting portion, and the connecting portion and the fixing portion are connected by bolts or screws.

[0012] Furthermore, a fixing groove is provided on the fixing portion, and the connecting portion can enter into the fixing groove.

[0013] Furthermore, an adsorption hole and a sealing member are provided in the fixing groove, the adsorption hole is communicated with an existing negative pressure adsorption device, and the sealing member is used to form a sealed environment between the connecting portion and the fixing groove.

[0014] Furthermore, the support portion is provided with connection holes, and the connection holes are connected in series through exhaust ducts and connected to the existing negative pressure adsorption device.

[0015] Furthermore, a conical column is also arranged in the fixing groove, and the connecting portion includes a conical column hole, and the conical column can enter the conical column hole.

[0016] Furthermore, the support seat also includes a fixing component, which is arranged in the fixing part, and the fixing component includes a fixed pressure block and a fixed disk. The position and shape of the fixed disk match the connecting part so that the connecting part can be connected to the fixed disk. A fixed edge is arranged on the connecting part. The position and shape of the fixed edge match the fixed pressure block so that the fixed pressure block can engage and press the fixed edge as the ratchet rotates.

[0017] Furthermore, the fixing assembly also includes a rotating handle, a ratchet and a rotating shaft. One end of the rotating shaft is connected to the fixed part through a bearing seat, and the other end passes through the ratchet and is connected to the fixed plate through the bearing seat. The rotating handle is connected to the rotating shaft. The rotating handle can drive the rotating shaft to rotate, so that the ratchet rotates with the rotating shaft.

[0018] Furthermore, a support rod and a compression spring are arranged on the fixed pressure block, the fixed pressure block is connected to the fixed part through the compression spring, the compression spring is in a compressed state, and the support rod abuts against the ratchet.

[0019] Furthermore, the support seat also includes a detection component, which is arranged in the fixed part. The detection component includes a pressing block, a power supply part, an indication part and a circuit fixing part. The circuit fixing part is fixed in the fixed part. A wire is arranged in the circuit fixing part. The indication part and the power supply part are connected in series through the wire, and the power supply part supplies power to the indication part through the wire.

[0020] Furthermore, the pressing block includes a pressing head, a supporting spring and a conductive part, the pressing head is connected to the conductive part, a through hole is set at a position corresponding to the circuit fixing part and the conductive part, a touch conductive groove is set on the circuit corresponding to the through hole, the touch conductive groove is connected to the circuit fixing part, the shape of the touch conductive groove matches the conductive part, and the conductive part can be inserted into the touch conductive groove through the through hole.

[0021] Furthermore, one end of the support spring is connected to the pressing head, and the other end is connected to the circuit fixing part. When the pressing head is not subjected to force, the support spring causes the pressing head to protrude from the bottom of the fixing groove and keeps the conductive part outside the through hole; when the pressing head and the bottom of the fixing groove are in the same plane, the conductive part is inserted through the through hole to touch the conductive groove.

[0022] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0023] (1) The workpiece clamping device provided by the present invention clamps the workpiece by providing a clamping block and a support seat. The clamping block is bonded to the workpiece and then fixed on the support seat, thereby fixing the workpiece to the support seat. The support seat is placed on the processing plane of the processing machine, so that the processing machine can process the workpiece. By using the clamping block bonded to the workpiece, it avoids the use of traditional clamps to cause pressure damage to the workpiece surface, and at the same time reduces the risk of unstable clamping due to the thin workpiece. By providing a rubber groove on the clamping block, the sol can contact the bonded rubber through the rubber groove, thereby dissolving the rubber and separating the block from the workpiece, increasing the contact area between the sol and the rubber, allowing the sol to fully contact the rubber through the rubber groove, thereby improving the glue removal effect.

[0024] (2) The workpiece clamping device provided by the present invention connects the support seats to the clamping blocks one by one by setting a plurality of support seats, so that the number and bonding position of the fixing units can be adjusted according to the shapes of different workpieces, without the need to customize according to the workpieces. The fixing unit composed of the support seat and the clamping block is universal and can be reused, which reduces production costs and improves utilization efficiency. By setting a fixing component, the fixed pressure block can fix the clamping block on the support seat, and by rotating the rotating handle, the ratchet wheel is rotated, thereby driving the fixed pressure block to move in the direction close to the connection part, so that the fixed pressure block is engaged and presses the fixed edge, thereby fixing the connection between the clamping block and the support seat. The operation is simple and easy to use, and the efficiency and speed of the connection between the support seat and the clamping block can be improved. The support seat and the clamping block can be connected or separated by adjusting the rotating handle. The assembly and disassembly are convenient, which can improve the processing efficiency and save labor costs.

[0025] (3) The workpiece clamping device provided by the present invention fixes the connecting part and the support seat by negative pressure adsorption by arranging adsorption holes and sealing members in the fixing groove. The supporting part is provided with connection holes, which are connected in series through exhaust ducts and connected to the existing negative pressure adsorption device, so that negative pressure adsorption operation can be performed on multiple support seats at the same time by one negative pressure adsorption device. The gas between the fixing groove and the connecting part is extracted through the adsorption holes, so that the fixing groove and the connecting part are firmly connected, and the operation is simple and the connection is convenient. By arranging a detection component, the stability of the connection between the support seat and the clamping block can be tested. When the connecting part is kept fixed by negative pressure adsorption, the connecting part is close to the bottom of the fixed groove, so that the conductive part is inserted into the contact conductive groove, and the indicating part is in a power-on indicating state; when the negative pressure adsorption on the connecting part is not enough to keep the connecting part fixed, there is a gap between the bottom surface of the connecting part and the fixed groove, and the extrusion head protrudes out of the bottom of the fixed groove under the action of the supporting spring reset, driving the conductive part to leave the contact conductive groove, so that the wire is in an open circuit state, thereby putting the indicating part in a power-off state, prompting the technician that the negative pressure suction is insufficient and needs to be adjusted, so that the technician can test the stability of the negative pressure adsorption effect. It is simple to operate and easy to use, and can improve the safety and stability of the workpiece clamping device.

[0026] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are only for the purpose of illustrating the particular invention and are not to be considered as limiting the invention. The same reference symbols denote the same components throughout the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the workpiece clamping device of Example 1 of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a clamping block according to Embodiment 1 of the present invention;

[0030] Figure 3 It is a schematic diagram of the overall structure of a workpiece clamping device according to Embodiment 2 of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a support base according to Embodiment 2 of the present invention;

[0032] Figure 5 It is a structural schematic diagram of a fixing assembly according to Embodiment 2 of the present invention;

[0033] Figure 6 This is one of the structural schematic diagrams of the clamping block of Example 2 of the present invention;

[0034] Figure 7 This is a second structural schematic diagram of a clamping block according to Embodiment 2 of the present invention;

[0035] Figure 8 It is a structural schematic diagram of a support base according to Embodiment 3 of the present invention;

[0036] Fig. 9 It is a schematic structural diagram of a tapered column according to Example 3 of the present invention;

[0037] Fig.10 It is a schematic structural diagram of a support base according to Embodiment 4 of the present invention;

[0038] Fig.11 It is a schematic diagram of the structure of the detection component of Example 4 of the present invention;

[0039] Fig.12 It is a schematic longitudinal cross-sectional view of the conductive portion and the contact conductive groove of the fourth embodiment of the present invention.

[0040] Reference numerals:

[0041] 1-clamping block; 11-block; 12-rubber groove; 13-connecting part; 131-fixing hole; 132-fixing edge; 2-support seat; 21-fixing part; 211-fixing groove; 2111-adsorption hole; 2112-seal; 2113-conical column; 22-support part; 221-connecting hole; 23-bottom plate; 24-fixing assembly; 241-fixing pressure block; 2411-support rod; 2412-compression spring; 242-rotating handle; 243-fixing shaft; 244-fixing disk; 245-ratchet; 246-rotating shaft; 25-detection assembly; 251-pressing block; 2511-pressing head; 2512-support spring; 2513-conductive part; 252-power supply part; 253-indicating part; 254-circuit fixing piece; 2541-touch conductive groove. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used to explain the principles of the present invention together with the present invention.

[0043] Example 1

[0044] This embodiment provides a workpiece clamping device, such as Figure 1 As shown, it includes a clamping block 1 and a support seat 2. The clamping block 1 is provided in plurality. The clamping block 1 is bonded to the workpiece 3 and then fixed on the support seat 2, thereby fixing the workpiece 3 and the support seat 2.

[0045] The support seat 2 includes a fixing portion 21, a supporting portion 22 and a bottom plate 23. The bottom plate 23 is connected to the fixing portion 21 through the supporting portion 22. The shape of the fixing portion 21 is set according to the shape of the workpiece 3. The fixing portion 21 is fixedly connected to the clamping block 1, thereby fixing the workpiece 3 on the support seat 2. The support seat 2 is placed on the processing plane of the processing machine, so that the processing machine can process the workpiece 3.

[0046] like Figure 2 As shown, the clamping block 1 includes a block body 11, a rubber groove 12 and a connecting portion 13. One end of the block body 11 is bonded to the workpiece 3, and the other end is connected to the connecting portion 13. The connecting portion 13 is connected to the fixing portion 21. The end surface of the block body 11 connected to the workpiece 3 is provided with a rubber groove 12, and a plurality of rubber grooves 12 are provided. When the workpiece 3 needs to be separated from the clamping block 1, a sol is squeezed into the rubber groove 12 to dissolve the bonded rubber, thereby separating the block body 11 from the workpiece 3. The connecting portion 13 is provided at one end of the block body 11 connected to the fixing portion 21, and the block body 11 is connected to the fixing portion 21 through the connecting portion 13.

[0047] Exemplarily, a threaded hole is provided on the connecting portion 13, and the connecting portion 13 is connected to the fixing portion 21 by bolts or screws.

[0048] Example 2

[0049] This embodiment provides a workpiece clamping device, such as Figure 3 As shown, the difference from Example 1 is that the number of support seats 2 is the same as the clamping block 1, and the support seats 2 are connected to the clamping block 1 to form a plurality of fixing units. The number and bonding positions of the fixing units can be adjusted according to the shapes of different workpieces 3, thereby eliminating the need to customize the fixing portion 21 according to the workpiece 3. The method has universality and can be reused, thereby reducing production costs and improving utilization efficiency.

[0050] like Figure 4 As shown, the support seat 2 also includes a fixing component 24, which is arranged in the fixing part 21. The fixing component 24 includes a fixed pressure block 241 and a fixed disk 244. The position and shape of the fixed disk 244 cooperate with the connecting part 13, so that the connecting part 13 can be connected to the fixed disk 244. A plurality of fixed pressure blocks 241 are provided, and the fixed pressure blocks 241 can fix the connecting part 13, thereby fixing the clamping block 1 on the support seat 2.

[0051] like Figure 4-5As shown, the fixing assembly 24 further includes a rotating handle 242, a ratchet 245 and a rotating shaft 246. One end of the rotating shaft 246 is connected to the fixing portion 21 through a bearing seat, and the other end passes through the ratchet 245 and is connected to the fixing plate 244 through a bearing seat. The rotating handle 242 is connected to the rotating shaft 246. The rotating handle 242 can drive the rotating shaft 246 to rotate, thereby driving the ratchet 245 to rotate. A sliding groove 211 is provided on the fixing portion 21, and the rotating handle 242 can slide in the sliding groove 211, thereby driving the ratchet 245 to rotate. There are multiple fixed pressure blocks 241, and a support rod 2411 and a compression spring 2412 are set on the fixed pressure block 241. The fixed pressure block 241 is connected to the fixed part 21 through the compression spring 2412. The compression spring 2412 is in a compressed state. The support rod 2411 is in contact with the ratchet 245. The rotation of the ratchet 245 can push the support rod 2411 to squeeze the compression spring 2412, so that the support rod 2411 moves back and forth with the movement of the ratchet 245, thereby driving the fixed pressure block 241 to move back and forth, so that the fixed pressure block 241 can fix the connecting part 13 on the fixed disk 244 or release the fixation of the connecting part 13 and the fixed disk 244 by rotating the rotating shaft 246.

[0052] It is worth noting that the position of the support rod 2411 is matched with the shape of the ratchet 245 so that the support rod 2411 can be synchronously moved closer to or farther away from the rotating shaft 246 as the ratchet 245 rotates.

[0053] like Figure 6 As shown, a fixed edge 132 is provided on the connecting portion 13 , and the position and shape of the fixed edge 132 match the fixed pressing block 241 , so that the fixed pressing block 241 can engage and press the fixed edge 132 with the rotation of the ratchet 245 , thereby fixing the connection between the connecting portion 13 and the fixed disk 244 .

[0054] Preferably, Figure 4 and Figure 7 As shown, the fixing assembly 24 further includes a fixing shaft 243 . A fixing hole 131 is provided on the connecting portion 13 . The fixing shaft 243 can enter into the fixing hole 131 , thereby positioning the clamping block 1 and increasing the stability of the clamping block 1 .

[0055] After the clamping block 1 is bonded to the workpiece 3, the connecting portion 13 is placed on the fixing plate 244 so that the fixing shaft 243 enters the fixing hole 131, the clamping block 1 is positioned, and the rotating handle 242 is rotated to rotate the ratchet 245, thereby driving the fixed pressure block 241 to move toward the connecting portion 13, so that the fixed pressure block 241 is engaged and presses the fixed edge 132, thereby fixing the connection between the clamping block 1 and the support seat 2.

[0056] Example 3

[0057] This embodiment provides a workpiece clamping device, such as Figure 3As shown, the difference from Example 2 is that the support base 2 does not include the fixing assembly 24 , and the support base 2 is composed of a fixing portion 21 , a supporting portion 22 and a bottom plate 23 .

[0058] like Figure 8 As shown, a fixing groove 211 is provided on the fixing portion 21 for fixing the clamping block 1. The connecting portion 13 can enter the fixing groove 211, and an adsorption hole 2111 and a sealing member 2112 are provided in the fixing groove 211. The sealing member 2112 forms a sealed environment between the connecting portion 13 and the fixing groove 211. The existing negative pressure adsorption device fixes the fixing groove 211 and the connecting portion 13 by negative pressure adsorption through the adsorption hole 2111. When the block 11 enters the fixing groove 211, the existing negative pressure adsorption device sucks out the gas between the connecting portion 13 and the fixing groove 211 from the adsorption hole 2111, realizes negative pressure adsorption fixation, and thus fixes the workpiece 3 to the support seat 2. The support seat 2 is moved to the processing plane of the processing machine, so that the processing machine can process the workpiece 3.

[0059] Preferably, the support portion 22 is provided with a connection hole 221, and the connection holes 221 are connected in series through an exhaust duct and connected to an existing negative pressure adsorption device, so that only one existing negative pressure adsorption device is needed to achieve negative pressure adsorption and fixation of multiple clamping blocks 1. After the existing negative pressure adsorption device is started, each support seat 2 is controlled by the existing negative pressure adsorption device through the connection hole 221, thereby improving the operation efficiency.

[0060] Preferably, Fig. 9 As shown, a conical column 2113 is further provided in the fixing groove 211 , and the connecting portion 13 includes a conical column hole, and the conical column 2113 can enter the conical column hole, thereby increasing the stability of the connection between the connecting portion 13 and the fixing groove 211 .

[0061] Example 4

[0062] This embodiment provides a workpiece clamping device, such as Fig.10 As shown, the difference from Example 3 is that the support seat 2 also includes a detection component 25, which is arranged in the fixing part 21 and is used to check the stability of the connection between the support seat 2 and the clamping block 1 to prevent the unstable connection between the support seat 2 and the clamping block 1 from affecting the processing of the workpiece 3.

[0063] It is worth noting that the detection component 25 is separated from the adsorption hole 2111 to prevent the detection component 25 from being affected by the suction force of the existing negative pressure adsorption device and affecting the detection accuracy.

[0064] like Figure 10-11As shown, the detection component 25 includes a pressing block 251, a power supply unit 252, an indicating unit 253 and a circuit fixing member 254. The circuit fixing member 254 is fixed in the fixing unit 21. A wire is arranged in the circuit fixing member 254. The indicating unit 253 and the power supply unit 252 are connected in series through the wire. The power supply unit 252 supplies power to the indicating unit 253 through the wire.

[0065] Exemplarily, the power supply unit 252 is a battery, and the battery supplies power to the indication unit 253 .

[0066] Exemplarily, the indicating portion 253 is an indicator light, and when the circuit is turned on, the indicator light emits light.

[0067] like Figure 11-12 As shown, the pressing block 251 includes a pressing head 2511, a supporting spring 2512 and a conductive part 2513. The pressing head 2511 and the supporting spring 2512 are made of insulating material. The pressing head 2511 is connected to the conductive part 2513. A through hole is set at a position corresponding to the circuit fixing part 254 and the conductive part 2513. A contact conductive groove 2541 is set on the circuit corresponding to the through hole. The contact conductive groove 2541 is connected to the circuit fixing part 254. The shape of the contact conductive groove 2541 matches the conductive part 2513. The conductive part 2513 can be inserted into the contact conductive groove 2541 through the through hole, so that the wire is conductive through the conductive part 2513. One end of the support spring 2512 is connected to the pressing head 2511, and the other end is connected to the circuit fixing part 254. When the pressing head 2511 is not subjected to force, the support spring 2512 makes the pressing head 2511 protrude from the bottom of the fixing groove 211 and keeps the conductive part 2513 outside the through hole; when the connecting part 13 is subjected to negative pressure suction to squeeze the pressing head 2511, so that the squeezing head 2511 and the bottom of the fixing groove 211 are in the same plane, the squeezing head 2511 puts the support spring 2512 in a compressed state, and makes the conductive part 2513 inserted through the through hole to touch the conductive groove 2541, so that the wire is in a conductive state, thereby making the indicating part 253 energized and in an indicating state.

[0068] Preferably, there are multiple pressing blocks 251, and the extrusion head 2511 protruding from the bottom of the fixing groove 211 at any position can drive the conductive part 2513 at that position to leave the contact conductive groove 2541, so that the indicating part 253 is in a power-off state. By providing multiple pressing blocks 251, the monitoring accuracy of the connection between the connecting part 13 and the fixing groove 211 can be improved.

[0069] When the connecting part 13 is held fixed by negative pressure, the connecting part 13 is tightly attached to the bottom of the fixing groove 211, so that the extrusion head 2511 and the bottom of the fixing groove 211 are in the same plane, and the conductive part 2513 is inserted into the conductive groove 2541 through the through hole, so that the indicating part 253 is in a power-on indicating state.

[0070] When testing the stability of the negative pressure adsorption effect on the connecting part 13, tilt the workpiece 3. If the negative pressure adsorption effect on the connecting part 13 is not enough to make the connecting part 13 close to the fixing groove 211, there will be a gap between the bottom surface of the connecting part 13 and the fixing groove 211, and the pressure on the extrusion head 2511 in the gap disappears. Under the action of the support spring 2512 to reset, the extrusion head 2511 protrudes out of the bottom of the fixing groove 211, driving the conductive part 2513 to leave the contact conductive groove 2541, so that the wire is in an open circuit state, thereby making the indicating part 253 in a power-off state, prompting the technician that the negative pressure suction effect on the connecting part 13 is insufficient.

[0071] The detection component 25 is provided to facilitate technicians to test the stability of the negative pressure adsorption effect and adjust the suction force in time according to the indication of the indication part 253, thereby improving the safety and stability of the workpiece clamping device for clamping the workpiece 3.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A workpiece clamping device, characterized in that: It comprises a clamping block (1) and a supporting seat (2), wherein the clamping block (1) is bonded to a workpiece (3), and the clamping block (1) is connected to the supporting seat (2).

2. The workpiece clamping device according to claim 1, characterized in that: The support seat (2) comprises a fixing portion (21), a supporting portion (22) and a bottom plate (23); the bottom plate (23) is connected to the fixing portion (21) via the supporting portion (22); and the fixing portion (21) is fixedly connected to the clamping block (1).

3. The workpiece clamping device according to claim 2, characterized in that: The clamping block (1) comprises a block body (11) and a connecting portion (13); one end of the block body (11) is bonded to the workpiece (3) and the other end is connected to the connecting portion (13); and the connecting portion (13) is connected to the fixing portion (21).

4. The workpiece clamping device according to claim 3, characterized in that: The clamping block (1) further comprises a rubber groove (12), wherein the rubber groove (12) is arranged on the end surface where the block body (11) is connected to the workpiece (3).

5. The workpiece clamping device according to claim 4, characterized in that: The clamping block (1) is connected to the supporting seat (2) to form a fixing unit, and a plurality of fixing units are provided.

6. The workpiece clamping device according to any one of claims 3 to 5, characterized in that: A threaded hole is provided on the connecting portion (13), and the connecting portion (13) and the fixing portion (21) are connected via bolts or screws.

7. The workpiece clamping device according to claim 5, characterized in that: A fixing groove (211) is provided on the fixing portion (21), and the connecting portion (13) can enter the fixing groove (211).

8. The workpiece clamping device according to claim 7, characterized in that: An adsorption hole (2111) and a sealing member (2112) are provided in the fixing groove (211); the adsorption hole (2111) is connected to an existing negative pressure adsorption device; and the sealing member (2112) is used to form a sealed environment between the connecting portion (13) and the fixing groove (211).

9. The workpiece clamping device according to claim 7 or 8, characterized in that: The support portion (22) is provided with connection holes (221), and the connection holes (221) are connected in series via exhaust ducts and are connected to an existing negative pressure adsorption device.

10. The workpiece clamping device according to claim 9, characterized in that: A conical column (2113) is also arranged in the fixing groove (211), and the connecting portion (13) comprises a conical column hole, and the conical column (2113) can enter the conical column hole.

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