Workpiece clamping device for interfacing between numerical control machine tools

Abstract

The utility model provides a workpiece clamping device is used to the connection between numerical control machine tools, including the fixture that is used for clamping the area that does not need to process in workpiece and sets up on numerical control machine tool is used for realizing the quick fixing or loosening of fixture's installation mechanism, installation mechanism corresponds the numerical control machine tool number setting that needs to shift of processing workpiece, a plurality of installation mechanisms are set up in a plurality of numerical control machine tools one to one, installation mechanism includes the stand, sets up the elastic chuck on the stand, the elastic chuck includes the chuck part, the chuck part includes at least two's clamping plate, forms the elastic gap that is used for providing the space of opening or tightening chuck part between two adjacent clamping plates, is all provided with the clamping piece on the clamping plate, is equipped with the guide rod that is used for tightening chuck part on the elastic chuck, the guide rod includes the connecting rod, sets up the guide head in the connecting rod one end, and the guide head forms the inclined wall that is gradually contracted. The utility model has the advantages of quick replacement, convenient connection, improving processing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of workpiece clamping, and in particular to a workpiece clamping device for connecting CNC machine tools. Background Technology

[0002] Numerical control machine tools (CNC machine tools) are devices that use computer numerical control technology to automatically control the movement and machining process of machine tools. Three-axis and four-axis CNC machine tools are widely used in manufacturing. Three-axis CNC machine tools mainly move along three linear coordinate axes (X, Y, and Z) to machine basic structures such as planes, holes, and simple contours on workpieces. Four-axis CNC machine tools add a rotary coordinate axis to the three-axis system, enabling the machining of multi-angle, complex curved surfaces, or irregularly shaped structures. In actual production, appropriate machine tools or multiple machine tools working together are selected based on the requirements and complexity of the parts to ensure workpiece accuracy.

[0003] For example, refer to Figure 1 To produce an irregularly shaped disc-shaped part named 3AS Body-1R, the disc-shaped workpiece needs to be machined on both a three-axis CNC machine tool and a four-axis CNC machine tool. Specifically, in existing technology, both the three-axis and four-axis CNC machine tools are equipped with a support for mounting the workpiece. A pressure block is mounted on the support, and the pressure block is detachably connected to the support by bolts. During installation, the bolts on the pressure block are loosened manually, the workpiece is manually aligned and placed in the corresponding position on the support, and the bolts are tightened to press the pressure block against the workpiece's flange (the area that does not require machining), thereby fixing the workpiece in place.

[0004] In use, the workpiece is manually installed on a three-axis CNC machine tool, where basic shape machining, hole machining, and preliminary surface machining are completed. Then, the workpiece is manually removed from the three-axis CNC machine tool and installed on a four-axis CNC machine tool in the same way. After more complex thread and surface finishing machining is performed on the four-axis CNC machine tool, the workpiece is manually removed again. This process gives the workpiece a prominent central thread hole, equally spaced side threads surrounding the central thread hole, and side holes that penetrate the side of the workpiece and communicate with the interior of the central thread hole, thus obtaining a finished product that meets the design requirements.

[0005] However, in the existing technology, manually disassembling or replacing workpieces is time-consuming and inefficient. Furthermore, during installation, the three-axis or four-axis CNC machine must stop working and wait for the workpiece to be installed. This downtime directly affects the overall working efficiency of the production line. Utility Model Content

[0006] To address the problems of time-consuming and inefficient manual disassembly or replacement of workpieces, which requires CNC machines to be stopped during installation and thus reduces the overall efficiency of the production line, this utility model provides a workpiece clamping device for quick replacement and connection between CNC machine tools.

[0007] This utility model provides a workpiece clamping device for connecting CNC machine tools, which adopts the following technical solution:

[0008] A workpiece clamping device for connecting CNC machine tools is characterized in that it includes a fixture for clamping the area of ​​the workpiece that does not need to be processed, and an installation mechanism set on the CNC machine tool for quickly fixing or releasing the fixture. The installation mechanism is set according to the number of CNC machine tools to be transferred for processing the workpiece, and multiple installation mechanisms are set one-to-one in multiple CNC machine tools.

[0009] The installation mechanism includes a frame and an elastic clamp mounted on the frame. The elastic clamp includes a clamp head, which includes at least two clamping plates. An elastic gap is formed between two adjacent clamping plates to provide space for opening or tightening the clamp head. Each clamping plate is provided with a locking block. A guide rod for tightening the clamp head is passed through the elastic clamp. The guide rod includes a connecting rod and a guide head at one end of the connecting rod. The guide head forms an inclined wall that gradually narrows. Each locking block is provided with a slanted groove that matches the inclined wall. The base of the fixture is provided with a groove for the locking blocks to extend into when the fixture is in the assembled state.

[0010] By adopting the above technical solution, when fixing the clamp, the guide rod is driven to move, which in turn drives the guide head to move along the direction of its inclined wall contraction, causing the locking blocks to abut against each other and tightening the clamp head. Then, the clamp is driven to extend the locking blocks into the groove in the assembled state. Next, the guide head is driven to reset, opening the clamp head. The clamp head generates an expanding elastic force that fixes the clamp to the elastic clamp head. When releasing the clamp, the guide rod is driven to move the guide head along the direction of its inclined wall contraction, causing the locking blocks to assemble and tightening the clamp head, allowing the clamp to be removed. This achieves rapid fixing and releasing of the clamp.

[0011] During processing, the fixture is installed outside the CNC machine tool. The installed fixture is quickly fixed by the mounting mechanism on one of the CNC machine tools. The workpiece is processed by the CNC machine tool. After completion, the fixture is quickly released by the mounting mechanism and transferred to the mounting mechanism of the next CNC machine tool until all processing is completed. Finally, the finished product is removed from the fixture.

[0012] Because the fixture installation process can be completed outside the CNC machine tool, and a quick-installation fixture mechanism is used, the problems of time-consuming and inefficient manual workpiece removal or replacement at the CNC machine tool are solved. The installation mechanism makes the fixing and loosening of the fixture much faster, thus avoiding downtime on three-axis or four-axis CNC machine tools during workpiece installation. This improvement significantly shortens part changeover time, ensuring continuous and efficient machine tool operation, significantly improving the overall efficiency of the production line, reducing time wasted due to downtime, and further enhancing production capacity and economic benefits.

[0013] Preferably, the fixture includes a base and a pressure block; one end of the base is provided with a groove for placing the workpiece, and a post is provided on the base with one end extending into and fixed to the base; the pressure block is provided with a hole corresponding to the position of the post, and the post and the hole are inserted into each other.

[0014] By adopting the above technical solution, the base and the pressure block can be quickly and accurately positioned by inserting the pins and sockets, reducing assembly errors and time waste.

[0015] Preferably, the pressure block has a through hole extending through the front and rear surfaces of the pressure block, the base has a threaded hole, and the pressure block is provided with a bolt that is threadedly engaged with the threaded hole.

[0016] By adopting the above technical solution, during connection, the drive bolt passes through the light hole and is threaded into the threaded hole of the base. Tightening the bolt connects the base and the pressure block, allowing the pressure block and the base to clamp the workpiece. The connection of the four bolts ensures the stability and firmness of the connection, further improving the clamping effect of the workpiece and the reliability of the overall structure.

[0017] Preferably, the fixture has a machining channel, which provides space for the machining components on the CNC machine tool to extend.

[0018] By adopting the above technical solution, the processing channel can be selected with appropriate shape and size according to actual processing needs, which can meet the processing accuracy of the target area of ​​the workpiece.

[0019] Preferably, the elastic clamp further includes a plug-in part and a fixing part; a plug-in hole is provided on the frame, and the plug-in part and the plug-in hole are plugged in; a connecting block is provided on the frame, and the connecting block is detachably connected to the frame by bolts, and a contour groove that matches the edge of the fixing part is provided on the connecting block.

[0020] By adopting the above technical solution, when installing the elastic clamp on the frame, the position of the elastic clamp on the frame can be quickly positioned by inserting the plug part into the plug hole. Then, by cooperating the contour groove with the fixing part of the elastic clamp and tightening the bolts to connect the connecting block to the frame, the elastic clamp can be stably fixed to the frame.

[0021] Preferably, the overall shape of the assembled card blocks is close to a square.

[0022] By adopting the above technical solution, the overall shape after assembly is close to square, which is conducive to providing uniform force distribution and symmetrical clamping effect, ensuring stable and accurate fixation of the clamp, and preventing the clamp from shifting or rotating after fixation.

[0023] Preferably, one of the card blocks has a positioning groove, and a positioning block is provided in the groove corresponding to the positioning groove, and the shapes of the positioning groove and the positioning block are adapted to each other.

[0024] By adopting the above technical solution, the driving fixture is driven so that when the clamping block in the assembled state extends into the groove, the positioning block extends into the positioning slot. Through the positioning block and the positioning slot, the direction of the fixture can be quickly positioned during the fixing process, thereby ensuring the processing accuracy, obtaining the required finished product, and further saving positioning time.

[0025] Preferably, the installation mechanism further includes a drive assembly for driving the guide head to move along the direction of contraction or expansion of the inclined wall. The drive assembly includes a drive component disposed in the frame and a lead screw with one end connected to the drive end of the drive component. The drive component is a motor, and the end of the lead screw facing away from the drive component extends into a plug hole. The guide rod is connected to the lead screw.

[0026] By adopting the above technical solution, during driving, the drive component rotates the lead screw, which in turn moves the guide rod, thus driving the guide head to move along the direction of contraction or expansion of the inclined wall. Using a lead screw motor provides high-precision and high-efficiency transmission.

[0027] Preferably, the lead screw has a connecting screw hole at one end away from the drive component, and the connecting rod has an external thread at one end away from the guide head, with the external thread and the connecting screw hole being threadedly engaged.

[0028] By adopting the above technical solution, the threaded connection method facilitates installation and disassembly, and allows for flexible maintenance and replacement.

[0029] Preferably, the drive assembly further includes a positioning wheel, which is sleeved on the lead screw and threadedly engaged with the lead screw, and the positioning wheel is connected to the frame.

[0030] By adopting the above technical solution, when the lead screw rotates, it rotates within the positioning wheel. The positioning wheel prevents the lead screw from deviating during operation, ensuring the stability and accuracy of the lead screw rotation.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. During processing, the fixture is installed outside the CNC machine tool. The installed fixture is quickly fixed by the mounting mechanism on one of the CNC machine tools. The workpiece is then processed by that CNC machine tool. After completion, the fixture is quickly released by the mounting mechanism and transferred to the mounting mechanism of the next CNC machine tool until all processing is completed. Finally, the finished product is removed from the fixture. Because the fixture installation process can be completed outside the CNC machine tool, and a quick fixture installation mechanism is used, the problems of long time consumption and low efficiency when manually disassembling or changing workpieces at the CNC machine tool are solved.

[0033] 2. The installation mechanism makes the fixing and loosening of the fixtures faster, thus avoiding downtime during workpiece installation on three-axis or four-axis CNC machine tools. This improvement also greatly shortens the part changeover time, ensuring that the machine tool can operate continuously and efficiently, significantly improving the overall work efficiency of the production line, reducing time wasted due to downtime, and further enhancing production capacity and economic benefits.

[0034] 3. Drive the fixture so that when the clamping block in the assembled state extends into the groove, the positioning block extends into the positioning slot. Through the positioning block and the positioning slot, the direction of the fixture can be quickly positioned during the fixing process, thereby ensuring the processing accuracy, obtaining the required finished product, and further saving positioning time. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of an existing workpiece and a finished product in the background art of this utility model.

[0037] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0038] Figure 3 This is a schematic diagram showing the relationship between the clamp and the mounting mechanism in an embodiment of this utility model.

[0039] Figure 4 This is an exploded view of the fixture in an embodiment of this utility model.

[0040] Figure 5 This is a schematic diagram of the groove structure in an embodiment of this utility model.

[0041] Figure 6 This is a cross-sectional view of the frame and the elastic clamp in an embodiment of this utility model.

[0042] Figure 7 This is a schematic diagram showing the relationship between the elastic clamp and the guide rod in an embodiment of this utility model.

[0043] Figure 8 This is a front view of the mounting mechanism in an embodiment of this utility model.

[0044] Figure 9 This is a schematic diagram of the structure of the driving component in an embodiment of this utility model.

[0045] The component designations are as follows: 1. Clamp; 11. Base; 12. Pressure block; 13. Insert post; 14. Bolt; 2. Mounting mechanism; 21. Stand; 22. Elastic chuck; 221. Chuck head; 2211. Clamping plate; 2212. Locking block; 222. Insertion part; 223. Fixing part; 23. Guide rod; 231. Connecting rod; 232. Guide head; 2321. Inclined wall; 24. Connecting block; 25. Driving component; 26. Lead screw; 3. Finished product; 4. Elastic gap; 5. Inclined groove; 6. Groove; 7. Receptacle; 8. Insertion hole; 9. Smooth hole; 10. Threaded hole; 15. Lower cross-cutting channel; 16. Upper cross-cutting channel; 17. Side hole channel; 18. Lower through hole channel; 19. Upper through hole channel; 20. Insertion hole; 27. Contouring groove; 28. Positioning groove; 29. ​​Positioning block; 30. Connecting screw hole; 31. External thread; 32. Positioning wheel; 33. Rod groove. Detailed Implementation

[0046] The following will refer to the appendix in the embodiments of this utility model. Figures 2 to 9 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0047] A workpiece clamping device for connecting CNC machine tools, referring to Figure 2 and Figure 3 It includes a fixture 1 for clamping the unprocessed areas of a workpiece and a mounting mechanism 2 installed on a CNC machine tool for quickly fixing or releasing the fixture 1. The mounting mechanism 2 is set according to the number of CNC machine tools required to transfer the workpiece. Multiple mounting mechanisms 2 are installed one-to-one in multiple CNC machine tools to ensure that the mounting mechanism 2 can match the workpiece transfer requirements between multiple machine tools.

[0048] In this embodiment, the workpiece needs to be processed on both a three-axis CNC machine tool and a four-axis CNC machine tool. Specifically, the mounting mechanism 2 is configured to handle two CNC machine tools required for workpiece transfer, with each mounting mechanism 2 positioned one-to-one within one of the two CNC machine tools. Furthermore, in conjunction with... Figure 1 The workpiece comprises a disk, a small frustum, and a large frustum arranged sequentially from bottom to top, with wing plates surrounding the outer wall of the disk near the bottom. (Refer to...) Figure 4 By machining on a three-axis CNC machine tool and a four-axis CNC machine tool respectively, the more prominent central tooth hole, the side tooth holes that are equally spaced around the central tooth hole, and the side holes that penetrate the side of the workpiece and communicate with the interior of the central tooth hole are formed into an irregular disc-shaped part 3 called 3AS body-1R.

[0049] Specifically, refer to Figure 4 and Figure 5 The fixture 1 includes a base 11 and a pressure block 12. The base 11 is cylindrical, and one end of the base 11 has a groove 7 for placing the workpiece. The groove 7 is circular, corresponding to the bottom side of the workpiece. The pressure block 12 is annular, and the outer radius of the pressure block 12 is the same as the radius of the base 11. The pressure block 12 is fitted onto the disc.

[0050] Reference Figure 4 and Figure 5 The base 11 is provided with cylindrical inserts 13, which are distributed along the axial direction of the base 11. One end of each insert 13 extends into and is fixed to the base 11. The pressure block 12 has corresponding insertion holes 8 at the positions of the inserts 13, and the inserts 13 are inserted into the holes 8. There are two inserts 13 and two corresponding insertion holes 8, with each insert 13 and hole 8 corresponding to the other. By inserting the two inserts 13 into the corresponding holes 8, the radial rotation and horizontal offset of the pressure block 12 relative to the base 11 can be restricted, thereby quickly and accurately positioning the base 11 and the pressure block 12, reducing assembly errors and time waste.

[0051] Continue to refer to Figure 4 and Figure 5The pressure block 12 has through holes 9 extending through its front and rear surfaces. The base 11 has threaded holes 10, and the pressure block 12 has bolts 14 threaded into the threaded holes 10. Furthermore, four through holes 9 are evenly spaced along the circumferential direction of the pressure block 12. Four threaded holes 10 are corresponding to four through holes 9, and each of the four through holes 9 is aligned with one of the four threaded holes 10. Thus, when the two inserts 13 are inserted into the two insert holes 8, the four through holes 9 and the four threaded holes 10 are connected. Four bolts 14 are corresponding to four threaded holes 10, and each of the four bolts 14 is threaded into one of the four threaded holes 10. During connection, the drive bolt 14 passes through the light hole 9 and is threaded into the threaded hole 10 of the base 11. Tightening the bolt 14 connects the base 11 and the pressure block 12, allowing the pressure block 12 and the base 11 to clamp the workpiece. The connection of the four bolts 14 ensures the stability and firmness of the connection, further improving the clamping effect of the workpiece and the reliability of the overall structure.

[0052] In addition, refer to Figure 4 and Figure 5 The fixture 1 has a machining channel, which provides space for machining components such as cutting tools on the CNC machine tool to extend. The machining channel is selected according to the actual machining requirements in terms of its shape and size to meet the machining accuracy of the target area of ​​the workpiece. In this embodiment, since it is necessary to cross-cut one side of the workpiece's flange, a lower cross-cutting machining channel 15 is provided on the base 11, and a corresponding upper cross-cutting machining channel 16 is provided on the pressure block 12. When the base 11 and the pressure block 12 are connected, the upper cross-cutting machining channel 16 and the lower cross-cutting machining channel 15 are interconnected. In addition, a circular side hole needs to be opened at the small frustum of the workpiece. Therefore, a side hole machining channel 17 is opened on the side of the pressure block 12 away from the base 11. A through hole needs to be opened for the disc that passes through the workpiece. A lower through hole machining channel 18 is provided on the base 11, and a corresponding upper through hole machining channel 19 is opened on the pressure block 12. When the base 11 and the pressure block 12 are connected, the upper through hole machining channel 19 and the lower through hole machining channel 18 are interconnected.

[0053] When installing fixture 1, the workpiece is placed on base 11, and pressure block 12 is fitted onto the disc. Simultaneously, the two insertion posts 13 are inserted into the two insertion holes 8 one-to-one, thus quickly and accurately positioning base 11 and pressure block 12, reducing errors and wasted time. Next, the drive bolt 14 passes through the through hole 9 and is threaded into the threaded hole 10 of base 11. Tightening the bolt 14 connects base 11 and pressure block 12, clamping the workpiece between them. The entire fixture 1 installation process can be completed outside the CNC machine tool.

[0054] During processing, the fixture 1 is quickly fixed using the mounting mechanism 2 on the three-axis CNC machine tool. The workpiece is then initially machined through the machining channel on the base 11 or pressure block 12 by the three-axis CNC machine tool. After completion, the fixture 1 is quickly released using the mounting mechanism 2. The fixture 1 is then transferred to the mounting mechanism 2 on the four-axis CNC machine tool. After fine machining by the four-axis CNC machine tool through the machining channel, the mounting mechanism 2 again quickly releases the fixture 1. Finally, the finished product 3 is removed from the fixture 1. Because the fixture 1 installation process can be completed outside the CNC machine tool, and the mounting mechanism 2 makes the fixing and releasing of the fixture 1 faster, the downtime for changing parts during workpiece installation on the three-axis or four-axis CNC machine tool is effectively reduced, improving production efficiency.

[0055] Specifically, refer to Figure 6 and Figure 7 The installation mechanism 2 includes a double-layered frame 21 and an elastic clamp 22 disposed on the frame 21. The elastic clamp 22 is located on the top layer of the frame 21 and includes a plug-in part 222, a fixing part 223 and a clamping head 221 distributed from bottom to top.

[0056] Reference Figure 6 and Figure 7 The frame 21 has a insertion hole 20 that extends through the top layer of the frame 21. The insertion part 222 is cylindrical and engages with the insertion hole 20. The fixing part 223 is annular, with a radius larger than that of the insertion part 222, creating a stepped structure between them. The clamping head 221 is cylindrical, and the radius of the fixing part 223 is also larger than that of the clamping head 221, further creating a stepped structure between them. Figure 3 The frame 21 is provided with fan-shaped connecting blocks 24. The connecting blocks 24 are detachably connected to the top layer of the frame 21 by bolts 14, and the connecting blocks 24 have contour grooves 27 that are adapted to the edge of the fixing part 223. There are three connecting blocks 24, which are evenly distributed along the circumferential direction of the fixing part 223. When installing the elastic clamp 22 on the frame 21, the position of the elastic clamp 22 on the frame 21 can be quickly positioned by inserting the plug part 222 into the plug hole 20. Then, by cooperating the contour groove 27 with the fixing part 223 of the elastic clamp 22, the connecting blocks 24 are connected to the frame 21 by tightening the bolts 14, thus fixing the elastic clamp 22 to the frame 21. The three connecting blocks 24 help to make the elastic clamp 22 more stable.

[0057] Reference Figure 6 and Figure 7The clamping head 221 includes at least two clamping plates 2211. In this embodiment, four clamping plates 2211 are provided, and the four clamping plates 2211 are distributed along the circumferential direction of the fixing part 223. An elastic gap 4 is formed between two adjacent clamping plates 2211, which provides space for opening or tightening the clamping head 221. In addition, each clamping plate 2211 is provided with a locking block 2212, that is, the number of locking blocks 2212 corresponding to the clamping plates 2211 is four. The four locking blocks 2212 are distributed along the circumferential direction, and the overall shape of the four locking blocks 2212 after being assembled is close to a square. When the driving locking blocks 2212 abut against each other, the elastic gap 4 is compressed, and the four locking blocks 2212 are all assembled, which can tighten the clamping head 221; conversely, the clamping head 221 is opened.

[0058] Continue to refer to Figure 6 and Figure 7 A guide rod 23 for tightening the clamping head 221 is provided on the elastic clamp 22. The guide rod 23 includes a circular connecting rod 231 and a guide head 232 disposed at one end of the connecting rod 231. The guide head 232 is frustum-shaped, and the radius of the upper bottom surface of the guide head 232 is the same as the radius of the connecting rod 231. The upper bottom surface of the guide head 232 is connected to one end of the connecting rod 231, thereby forming an inclined wall 2321 that gradually tapers from away from the connecting rod 231 towards the connecting rod 231. Each of the clamping blocks 2212 has an arc-shaped rod groove 33, that is, the four clamping blocks 2212 have a total of four rod grooves 33. When the clamping blocks 2212 are assembled, the rod grooves 33 are assembled to allow the connecting rod 231 to pass through. Each of the clamping blocks 2212 has a slanted groove 5 that matches the inclined wall 2321, that is, the four clamping blocks 2212 have a total of four slanted grooves 5.

[0059] Reference Figure 6 and Figure 7 One end of the connecting rod 231, away from the guide head 232, passes through the rod groove 33, positioning the guide head 232 at the inclined groove 5. When the drive blocks 2212 assemble, by driving the guide head 232 to move along the contraction direction of its inclined wall 2321, the guide head 232 gradually abuts against and slides on the walls of the four inclined grooves 5, thus gradually driving the blocks 2212 to abut against each other and assemble. Conversely, by driving the guide head 232 to move along the expansion direction of its inclined wall 2321, the blocks 2212 can be gradually driven to reset.

[0060] Reference Figure 5The base 11 of the clamp 1 has a groove 6 for the locking blocks 2212 to extend into when in the assembled state. When fixing the clamp 1, the guide head 232 is driven to move along the contraction direction of its inclined wall 2321, causing the locking blocks 2212 to abut against each other and tightening the clamp head 221. Then, the clamp 1 is driven, causing the locking blocks 2212 in the assembled state to extend into the groove 6. Next, the guide head 232 is driven to move along the expansion direction of its inclined wall 2321, opening the clamp head 221. The expansion elasticity of the clamp head 221 fixes the clamp 1 to the elastic clamp head 22. When releasing the clamp 1, the guide rod 23 is driven again, causing the guide head 232 to move along the contraction direction of its inclined wall 2321, causing the locking blocks 2212 to assemble and tightening the clamp head 221, allowing the clamp 1 to be removed. This achieves quick fixing and loosening of the clamp 1. Furthermore, the overall shape of the four clamping blocks 2212 after assembly is close to square, which is conducive to providing a uniform force distribution and symmetrical clamping effect, ensuring that the clamp 1 is fixed stably and accurately, while preventing the clamp 1 from shifting or rotating after fixing.

[0061] In addition, refer to Figure 5 and Figure 7 One of the clamping blocks 2212 has an approximately semi-circular positioning groove 28. A positioning block 29 is provided in the groove 6 corresponding to the positioning groove 28. The shapes of the positioning groove 28 and the positioning block 29 are adapted to each other. When the driving fixture 1 is driven, the clamping block 2212 in the assembled state extends into the groove 6, and the positioning block 29 extends into the positioning groove 28. Through the positioning block 29 and the positioning groove 28, the direction of the fixture 1 can be quickly positioned during the fixing process, thereby ensuring the processing accuracy, obtaining the required finished product 3, and further saving positioning time.

[0062] Reference Figure 8 and Figure 9 The installation mechanism 2 also includes a drive assembly, which is used to drive the guide head 232 to move along the direction of contraction or expansion of the inclined wall 2321. Specifically, the drive assembly includes a drive member 25 disposed in the frame 21, a lead screw 26 connected at one end to the drive end of the drive member 25, and a positioning wheel 32 threaded to the lead screw 26.

[0063] Reference Figure 8 and Figure 9 The driving component 25 is a motor as in the prior art, and the control and drive of the motor adopt conventional methods of the prior art. The driving component 25 is located on the bottom side of the elastic chuck 22. One end of the lead screw 26 is connected to the driving end of the driving component 25, and the end of the lead screw 26 away from the driving component 25 passes through the frame and extends into the insertion hole 20. The guide rod 23 is connected to the lead screw 26. The end of the lead screw 26 away from the driving component 25 has a connecting screw hole 30, and the end of the connecting rod 231 away from the guide head 232 has an external thread 31. The external thread 31 and the connecting screw hole 30 are threadedly engaged, so that the guide rod 23 and the lead screw 26 are connected by threads.

[0064] During operation, the drive component 25 rotates the lead screw 26, which in turn moves the guide rod 23, thus driving the guide head 232 to move along the direction of contraction or expansion of the inclined wall 2321. Using a motor for the lead screw 26 provides high-precision and high-efficiency transmission.

[0065] Reference Figure 8 and Figure 9 The positioning wheel 32 is sleeved on the lead screw 26 and threadedly engaged with it. The positioning wheel 32 is connected to the frame 21. When the lead screw 26 rotates, it rotates within the positioning wheel 32. The positioning wheel 32 prevents the lead screw 26 from deviating during operation, ensuring the stability and accuracy of its rotation. Two positioning wheels 32 are provided, spaced apart along the length of the lead screw 26, which helps to evenly distribute the load and further improves the stability and reliability of the system.

[0066] The implementation principle of this application is as follows: When installing fixture 1, the workpiece is placed on base 11, and pressure block 12 is fitted onto the disc. At the same time, two insert pins 13 are inserted into two corresponding insert holes 8, thereby quickly and accurately positioning base 11 and pressure block 12, reducing errors and wasted time. Then, after the drive bolt 14 passes through the light hole 9, it is threaded into the threaded hole 10 of base 11. Tightening the bolt 14 connects base 11 and pressure block 12, and pressure block 12 and base 11 clamp the workpiece. The entire installation process of fixture 1 can be completed outside the CNC machine tool.

[0067] When the clamp 1 is fixed, the drive member 25 drives the lead screw 26 to rotate, the lead screw 26 drives the guide rod 23 to move, and drives the guide head 232 to move in the direction of contraction of its inclined wall 2321, so that the clamping blocks 2212 abut against each other and tighten the clamping head 221. Then the clamp 1 is driven so that the clamping blocks 2212 in the assembled state extend into the groove 6. Then the drive member 25 drives the lead screw 26 to rotate, and drives the guide head 232 to move in the direction of expansion of its inclined wall 2321, opening the clamping head 221. The clamping head 221 brings the expansion elastic force to fix the clamp 1 and the elastic clamping head 22.

[0068] When the clamp 1 is released, the drive component 25 drives the lead screw 26 to rotate again, driving the guide rod 23, causing the guide head 232 to move in the direction of contraction of its inclined wall 2321, so that the locking block 2212 is engaged and the clamp head 221 is tightened, thus the clamp 1 can be taken out, thereby achieving quick fixing and loosening of the clamp 1.

[0069] During processing, the fixture 1 is quickly fixed by the mounting mechanism 2 on the three-axis CNC machine tool. The workpiece is initially processed by the three-axis CNC machine tool through the processing channel. After completion, the fixture 1 is quickly released by the mounting mechanism 2. The fixture 1 is then transferred to the mounting mechanism 2 of the four-axis CNC machine tool. After the four-axis CNC machine tool performs fine processing through the processing channel, the mounting mechanism 2 releases the fixture 1 again quickly. Finally, the finished product 3 is removed from the fixture 1.

[0070] Since the installation process of fixture 1 can be completed outside the CNC machine tool, and the quick-release fixture 1 installation mechanism 2 is adopted, the problems of long time consumption and low efficiency when manually disassembling or changing workpieces at the CNC machine tool are solved. Installation mechanism 2 makes the fixing and loosening process of fixture 1 much faster, thus avoiding downtime on three-axis or four-axis CNC machine tools during workpiece installation. This improvement significantly shortens part changeover time, ensures continuous and efficient machine tool operation, significantly improves the overall work efficiency of the production line, reduces time wasted due to downtime, and further enhances production capacity and economic benefits.

[0071] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A workpiece clamping device for connecting CNC machine tools, characterized in that: It includes a fixture (1) for clamping the area of ​​the workpiece that does not need to be processed, and an installation mechanism (2) set on the CNC machine tool for quickly fixing or releasing the fixture (1). The installation mechanism (2) is set according to the number of CNC machine tools to be transferred for processing the workpiece, and multiple installation mechanisms (2) are set in multiple CNC machine tools in a one-to-one correspondence. The installation mechanism (2) includes a frame (21) and an elastic clamp (22) disposed on the frame (21); the elastic clamp (22) includes a clamp head (221), the clamp head (221) includes at least two clamping plates (2211), and an elastic gap (4) is formed between two adjacent clamping plates (2211) to provide space for opening or tightening the clamp head (221); each clamping plate (2211) is provided with a locking block (2212); the elastic clamp (22) is threaded through A guide rod (23) for tightening the clamp head (221) is provided. The guide rod (23) includes a connecting rod (231) and a guide head (232) disposed at one end of the connecting rod (231). The guide head (232) forms an inclined wall (2321) that gradually narrows. Each of the clamping blocks (2212) is provided with a slanted groove (5) that is adapted to the inclined wall (2321). The base (11) of the clamp (1) is provided with a groove (6) for the clamping blocks (2212) in the assembled state to extend into.

2. The workpiece clamping device for connecting CNC machine tools according to claim 1, characterized in that: The fixture (1) includes a base (11) and a pressure block (12); one end of the base (11) is provided with a groove (7) for placing the workpiece, and a post (13) is provided on the base (11) with one end extending into and fixed to the base (11). The pressure block (12) is provided with a hole (8) corresponding to the position of the post (13), and the post (13) and the hole (8) are inserted into each other.

3. The workpiece clamping device for connecting CNC machine tools according to claim 2, characterized in that: The pressure block (12) has a light hole (9) that passes through the front and rear surfaces of the pressure block (12), the base (11) has a threaded hole (10), and the pressure block (12) is provided with a bolt (14) that is threaded into the threaded hole (10).

4. A workpiece clamping device for connecting CNC machine tools according to claim 1, 2 or 3, characterized in that: The fixture (1) has a machining channel, which provides space for machining components on the CNC machine tool to extend.

5. A workpiece clamping device for connecting CNC machine tools according to claim 1, characterized in that: The elastic clamp (22) also includes a plug-in part (222) and a fixing part (223); the frame (21) is provided with a plug-in hole (20), and the plug-in part (222) and the plug-in hole (20) are plugged in; the frame (21) is provided with a connecting block (24), and the connecting block (24) is detachably connected to the frame (21) by bolts (14), and the connecting block (24) is provided with a contour groove (27) that matches the edge of the fixing part (223).

6. A workpiece clamping device for connecting CNC machine tools according to claim 1, characterized in that: After the card blocks (2212) are assembled, the overall shape is close to a square.

7. A workpiece clamping device for connecting CNC machine tools according to claim 1, characterized in that: One of the card blocks (2212) has a positioning groove (28), and a positioning block (29) is provided in the groove (6) corresponding to the positioning groove (28). The shapes of the positioning groove (28) and the positioning block (29) are adapted to each other.

8. A workpiece clamping device for connecting CNC machine tools according to claim 1, characterized in that: The mounting mechanism (2) also includes a drive assembly, which is used to drive the guide head (232) to move in the direction of contraction or expansion along the inclined wall (2321). The drive assembly includes a drive member (25) disposed in the frame (21) and a lead screw (26) with one end connected to the drive end of the drive member (25). The drive member (25) is a motor. The end of the lead screw (26) away from the drive member (25) extends into the insertion hole (20). The guide rod (23) is connected to the lead screw (26).

9. A workpiece clamping device for connecting CNC machine tools according to claim 8, characterized in that: The lead screw (26) has a connecting screw hole (30) at one end away from the drive member (25), and the connecting rod (231) has an external thread (31) at one end away from the guide head (232). The external thread (31) and the connecting screw hole (30) are threaded together.

10. A workpiece clamping device for connecting CNC machine tools according to claim 8, characterized in that: The drive assembly also includes a positioning wheel (32), which is sleeved on the lead screw (26) and threadedly engaged with the lead screw (26). The positioning wheel (32) is connected to the frame (21).

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