Hydraulic clamp for vertical machining center

Abstract

The utility model relates to a hydraulic clamp for a vertical machining center. An inner supporting seat is arranged in the middle of the bottom plate; long-stroke corner clamping cylinders are symmetrically arranged on the two sides of the bottom plate. An inner side fixing seat and an outer side fixing seat are respectively arranged at two ends of the bottom plate; an inner side fixing block is arranged on the inner side fixing seat; a positioning column is movably arranged at one end of the inner fixing block; outer fixing blocks are arranged on the side surfaces of the outer fixing seats; pushing heads are movably arranged at the ends, deviating from the outer fixing seats, of the outer fixing blocks; a surface positioning column is arranged on the bottom plate; the bottom plate is also provided with a detection clamping seat, a left supporting seat and a right push cylinder seat. The side faces of the inner side supporting base and the left supporting base are each provided with a hydraulic rising type threaded supporting cylinder. Push cylinders are respectively arranged on the side surfaces of the detection clamping seat and the right push cylinder seat; the top of the push cylinder is over against the top of the hydraulic rising threaded support cylinder; and a left sequence valve and a right sequence valve are respectively arranged on the bottom plate. The device is stable and reliable in structure, and the machining efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a hydraulic fixture for a vertical machining center. Background Technology

[0002] In recent years, automotive transmission systems have continuously made breakthroughs in shift speed, fuel economy, reliability, and durability to meet the market's increasingly demanding requirements for high performance, diversification, and personalization. These performance improvements inevitably rely on continuous refinement of internal transmission system components, especially the transmission rear cover, which not only has a complex shape but also requires high machining precision.

[0003] The entire large end face of the transmission rear cover needs to be machined. The square side has two notches, allowing two clamping plates to pass through these notches and clamp the transmission rear cover inside the large end face without interfering with milling. However, the circular side lacks notches, making it impossible to clamp the transmission rear cover through them. If no clamping plate is placed on the circular side, while the transmission rear cover is clamped by the two clamping plates on the square side, the circular side can only withstand a relatively small cutting force. During rough machining, the cutting force is very high, significantly increasing the risk of displacement of the transmission rear cover. This clamping solution is unacceptable. To effectively clamp the transmission rear cover, only one clamping plate can be placed on the circular end face. However, the interference of this clamping plate will inevitably affect the milling of the large end face. The final solution is to use a reverse clamping plate method: when interference occurs during milling, the clamping plate is removed, and then moved back to clamp. While this method can barely manage the machining, it requires multiple interruptions during the machining process to manually loosen and tighten the clamping plate, which is not only cumbersome but also severely impacts machining efficiency.

[0004] The mounting surface and positioning holes on the large end side of the transmission rear cover are significantly distanced from the center hole on the small end side, yet the machining accuracy requirements between them are extremely high. Failure to meet these requirements will affect the performance of the transmission system, leading to adverse effects such as excessive noise, overheating, and reduced lifespan. Therefore, the optimal process solution is to complete the machining of the mounting surface and positioning holes on the large end side and the center hole on the small end side in a single clamping operation. This can be achieved by placing the transmission rear cover with the large end side facing upwards. Since most of the machining is concentrated on the large end side, the main positioning and clamping components must be located there, completely surrounding the transmission rear cover. This arrangement results in the center hole on the small end side being hidden inside the fixture, significantly increasing the difficulty of positioning and clamping the center hole. Previous fixtures used manual support devices for the center hole, but due to the limited internal space, operation was very inconvenient, and the effectiveness was greatly reduced. To address the inconvenience of operation, some fixtures have been improved by replacing manual support devices with support cylinders, which has indeed shown some effectiveness. However, the cutting force that the support cylinders can withstand is relatively small, and they lack clamping force. In particular, the efficiency is low when roughing the center hole, and the surface of the center hole after finishing sometimes has fine vibration marks, which cannot meet the high machining accuracy requirements of the transmission end cover. Utility Model Content

[0005] This invention primarily addresses the technical problems of low efficiency and low precision in existing technologies. To solve these problems, a hydraulic fixture for a vertical machining center is designed. This fixture features a release-detection type corner clamping cylinder on the circular side of the large end face for clamping, along with two clamping points on the square side, ensuring a very secure clamping of the transmission rear cover. When milling the large end face of the transmission rear cover, the area outside the clamping point of the release-detection type corner clamping cylinder is first rough-machined. Then, the release-detection type corner clamping cylinder is activated, and the pressure plate rotates to move away from the pressure plate, clearing the previously unmachined area. At this point, the vertical machining center's control system outputs air pressure to the release-detection type corner clamping cylinder for detection. Only after confirming release will the milling cutter be controlled to perform rough machining on this area. Because the clamping force is relatively small at this stage, roughing is completed by multiple passes with a small cutting depth. Then, the large end face is finish milled. Since the depth of cut and cutting force are very small during finish milling, the clamping force remains reliable. After the large end face is finish milled, releasing the detection-type corner clamping cylinder triggers a clamping action. Rotating the pressure plate of the detection-type corner clamping cylinder re-clamps the transmission rear cover, and then other machining continues. This clamping scheme is the preferred option, completely replacing the previous manual pressure plate method. The entire process is instantaneous and automatic, not only stable and reliable but also significantly improving machining efficiency. More importantly, it completely eliminates tedious manual operation and avoids human error.

[0006] This utility model discloses a hydraulic fixture for a vertical machining center. The fixture mainly includes a fixture base plate, a vertical positioning mechanism, a horizontal positioning mechanism, an intelligent detection clamping mechanism, a small-end side support clamping mechanism, an inner fixed seat, an outer fixed seat, a floating support seat, a spring-loaded external threaded support cylinder, and a sequence valve. The vertical positioning mechanism includes a positioning pin, an inner fixed block, a push head, an outer fixed block, and a spring. The horizontal positioning mechanism includes an inner positioning block, an inner positioning block adjusting pad, an outer positioning block, an outer positioning block adjusting pad, and a lever clamping cylinder. The intelligent detection clamping mechanism includes two clamping seats, a detection clamping seat, a long pressure pin, a short pressure pin, a face positioning pin, a long-stroke corner clamping cylinder, and a release detection corner clamping cylinder. The small-end side support clamping mechanism includes a left support seat, an inner support seat, a right push cylinder seat, a push cylinder, and a hydraulically rising external threaded support cylinder. This hydraulic fixture achieves the positioning and clamping of a transmission rear cover with a complex shape and high machining accuracy requirements. The machining process is stable and reliable, making it a highly preferred solution.

[0007] This utility model discloses a hydraulic clamp for a vertical machining center, comprising: a base plate; an inner support seat disposed in the middle of the base plate; long-stroke corner clamping cylinders symmetrically disposed on both sides of the base plate and the inner support seat; and an inner fixed seat and an outer fixed seat disposed at both ends of the base plate and the inner support seat, respectively.

[0008] An inner fixing block is provided on the inner fixing seat; a positioning post is movably provided at one end of the inner fixing block away from the inner fixing seat.

[0009] An outer fixing block is provided on the side of the outer fixing seat; a push head is movably provided at one end of the outer fixing block away from the outer fixing seat; a surface positioning post is provided at the lower part of the pressure plate end of the long stroke corner clamping cylinder on the base plate;

[0010] The base plate is also provided with a detection clamping seat, a left support seat, and a right push cylinder seat; the detection clamping seat is located on the side of the outer fixed seat; the left support seat and the right push cylinder seat are symmetrically arranged on both sides of the inner support seat; the inner support seat and the left support seat are respectively provided with hydraulic lifting threaded support cylinders; the detection clamping seat and the right push cylinder seat are respectively provided with push cylinders; a left sequence valve and a right sequence valve are respectively provided on the base plate.

[0011] Furthermore, lever clamping cylinders are respectively provided on the sides of the inner and outer fixing seats; the pressure plate of the lever clamping cylinder faces the inner support seat.

[0012] Furthermore, the inner fixing block includes a large-diameter end and a small-diameter end; the small-diameter end is disposed on the side of the large-diameter end; the end of the small-diameter end is movably connected to a positioning post; the positioning post is threadedly engaged with the small-diameter end; hexagonal thin nuts are fitted at both ends of the positioning post; and an inner positioning block is disposed on the side of the large-diameter end.

[0013] Furthermore, an inner positioning block adjustment pad is provided between the inner positioning block and the inner fixing block.

[0014] Furthermore, the long-stroke angle clamping cylinder is mounted on the base plate via a clamping seat; a long pressure nail is provided downward at the end of the pressure plate of the long-stroke angle clamping cylinder.

[0015] Furthermore, a floating support seat is provided on the side of the detection clamping seat.

[0016] Furthermore, spring-loaded external threaded support cylinders are respectively provided on the inner fixed seat, outer fixed seat, left support seat, right push cylinder seat and floating support seat.

[0017] Furthermore, a release detection type corner clamping cylinder is provided on the top of the detection clamping seat; a short pressure nail is provided downward at the end of the pressure plate of the release detection type corner clamping cylinder.

[0018] Furthermore, an outer positioning block adjustment pad is provided between the outer fixing block and the outer fixing seat.

[0019] This fixture is implemented as follows: When in use, this fixture has an inner and outer side. Taking the front view as a reference, the end furthest from the front view is the inner side. The large end of the transmission rear cover is placed upwards in this fixture, perpendicular to the spindle of the vertical machining center. The square side of the large end face faces inwards, and the round side faces outwards. The inner side of the square side boss serves as the positioning surface for the vertical positioning mechanism, while the left side of the square side boss and the left side of the round lower side boss serve as the positioning surfaces for the horizontal positioning mechanism. The vertical positioning mechanism includes a positioning post, an inner fixing block, a push head, and an outer fixing block. The inner fixing block is mounted on an inner fixing seat, and the positioning post is mounted on the upper right of the inner fixing block. The positioning post has adjustment and locking functions. By rotating the positioning post knob, its exposed length can be adjusted. After adjustment, two hexagonal thin nuts are tightened to lock the positioning post, thus fixing it in place. The positioning post contacts and positions itself against the inner side of the square side boss of the transmission rear cover. The outer fixing block is installed on the side of the outer fixing seat near the detection clamping seat. The push head is movably installed on the upper right part of the outer fixing block. The push head can slide freely in the mounting hole of the outer fixing block. The front end of the push head is chamfered, which serves as a guide. A straight guide groove is provided on the outer wall of the end of the push head that extends into the mounting hole. A hexagonal set screw passes through the outer fixing block, and its end can extend into the guide groove. The hexagonal set screw is locked to the outer fixing block by a hexagonal thin nut. An inner hole is provided at the bottom of the push head, with an opening at the lower end. A spring is provided inside the inner hole. One end of the spring contacts the inner wall of the inner hole of the push head, and the other end contacts the bottom surface of the mounting hole of the outer fixing block. When the transmission rear cover is placed into this fixture, the outer side of the circular side boss will contact the front end of the push head. As it is lowered and placed in, the push head will slide into the hole of the outer fixing block under the action of the chamfered surface. After the transmission rear cover is installed, the push head will press against the transmission rear cover under the action of the spring force, so that the inner side of the square side boss of the transmission rear cover is firmly in contact with the positioning post. Through the above settings, the vertical positioning of the transmission rear cover is effectively achieved.

[0020] The lateral positioning mechanism includes an inner positioning block, an inner positioning block adjusting pad, an outer positioning block, an outer positioning block adjusting pad, and lever clamping cylinders. The inner positioning block and the inner positioning block adjusting pad are mounted on the inner fixed block of the vertical positioning mechanism, while the outer positioning block and the outer positioning block adjusting pad are mounted on the outer fixed seat. Lever clamping cylinders are installed on both the inner and outer fixed seats, and pressure plates are installed on each of the two lever clamping cylinders. The inner and outer positioning block adjusting pads enable both positioning blocks to have adjustment functions. When the positions of the inner and outer positioning blocks are not suitable, their thickness can be changed as needed by milling or grinding the inner and outer positioning block adjusting pads. After reinstallation, they serve to adjust the positions of the inner and outer positioning blocks. The inner positioning block contacts and positions itself against the left side of the square side boss of the transmission rear cover, while the outer positioning block contacts and positions itself against the left side of the circular lower side boss of the transmission rear cover. The pressure plate of the lever clamping cylinder on the inner fixing seat contacts the right side of the square side boss and pushes the transmission rear cover to the left. Similarly, the pressure plate of the lever clamping cylinder on the outer fixing seat contacts the right side of the circular lower side boss and pushes the transmission rear cover to the left. Due to the complex shape of the transmission rear cover, both pressure plates are folded plates. The two lever clamping cylinders provide sufficient clamping force, and the two pressure plates simultaneously push the transmission rear cover to the left, ensuring firm contact between the transmission rear cover and the inner and outer positioning blocks. This configuration effectively positions the transmission rear cover laterally.

[0021] The clamping mechanism for intelligent detection includes a left clamping seat, a right clamping seat, a detection clamping seat, a pressure plate, long pressure nails, short pressure nails, surface positioning posts, a long-stroke corner clamping cylinder, and a release detection type corner clamping cylinder. The square side of the large end face of the transmission rear cover has two notches, each with a clamping mechanism. Due to the large depth between the bottom of the notch and the large end face, long-stroke corner clamping cylinders are used. They are installed on the left and right clamping seats respectively. Long pressure nails are also set on the pressure plates of the other two clamping cylinders. Surface positioning posts are set directly below the two long pressure nails and are fixed to the fixture base plate. Through the above design, the transmission rear cover is effectively clamped at the two notches. There is no notch on the circular side of the large end face, so it can only be clamped on the large end face. For this purpose, a release detection type corner clamping cylinder is set up. It is equipped with a pressure plate and short pressure pins. A face positioning post is also set directly below the short pressure pins. It is fixed on the detection clamping seat. The release detection air pressure port of the clamping cylinder is connected to the air circuit of the vertical machining center, and its detection air pressure exhaust port is connected to the exhaust hole of the detection clamping seat. Initially, the release-detection corner clamping cylinder performs a clamping action, roughing the area outside the clamping point of the upper pressure plate. Then, the cylinder performs a release action, rotating and moving the pressure plate to clear the previously unprocessed area. At this point, the vertical machining center's control system provides air pressure through the release-detection air pressure port into the corner clamping cylinder and detects whether the air pressure in the air circuit has decreased. If the air pressure in the air circuit can be maintained, it indicates that no venting has occurred, the corner clamping cylinder's release action is complete, and the pressure plate has completely moved away from the large end face. Only then will the control system control the milling cutter to perform roughing on this area. Conversely, if the detected air pressure in the air circuit decreases, it indicates that venting has occurred, the corner clamping cylinder's release action has not been performed or has not been performed completely—meaning the pressure plate has not rotated or has rotated but has not completely moved away from the large end face. In this case, the control system will stop machining and issue an alarm, informing the operator to investigate and resolve the issue. In summary, this clamping mechanism not only solves the problem of clamping the oddly shaped transmission rear cover, but also possesses intelligence, with excellent features such as automatic execution, automatic detection, and intelligent judgment. It is also more stable and reliable, making it a highly preferred solution worthy of promotion.

[0022] The small-end side support and clamping mechanism includes a left support seat, an inner support seat, a right push cylinder seat, a push cylinder, and a hydraulically operated lifting external thread support cylinder. Hydraulically operated lifting external thread support cylinders are installed on the left and inner support seats, while push cylinders are installed on the right push cylinder seat and the detection clamping seat. The push cylinders and support cylinders are arranged at a 90° angle, with the push cylinder heads directly facing the support cylinder heads. The push cylinders provide clamping force to the small end side, but this clamping force cannot be too large, otherwise clamping deformation will occur, leading to dimensional deviations in the small-end side center hole. This support and clamping mechanism provides suitable clamping force, allowing the small end side to withstand slightly larger cutting forces during machining. This not only improves machining efficiency but also maintains stability, making it an excellent support and clamping solution.

[0023] In addition, a total of seven spring-rising external threaded support cylinders are installed on the outer fixed seat, left support seat, inner fixed seat, right push cylinder seat and floating support seat. Their tops can all hit the blank surface on the lower side of the large end to play a supporting role, which provides a strong guarantee for the stable processing of the transmission rear cover.

[0024] This fixture controls the various hydraulic actuators in the following way:

[0025] The hydraulic system of the vertical machining center first drives two lever clamping cylinders to perform clamping actions, pushing the transmission rear cover to the left to complete the lateral positioning. Then, it drives the release detection type corner clamping cylinder to perform clamping actions, clamping the circular side of the transmission rear cover product. Next, it drives two long-stroke corner clamping cylinders to perform clamping actions, clamping the square side of the transmission rear cover product. Then, the left sequence valve opens, driving seven spring-lift external thread support cylinders and two hydraulic lift external thread support cylinders to complete the support of the transmission rear cover product. Then, the right sequence valve opens, driving two push cylinders to complete the clamping of the small end side of the transmission rear cover product. At this point, the support and clamping of the transmission rear cover product is completed, and the machining of the transmission rear cover product begins.

[0026] When machining the clamping area of ​​the release detection type corner clamping cylinder pressure plate, the hydraulic system will drive the release detection type corner clamping cylinder to perform the release action. After that, the control system will provide air pressure for detection. If the detection is qualified, machining will continue. After the machining of this area is completed, the hydraulic system will drive the release detection type corner clamping cylinder to perform the clamping action, and then machining will continue.

[0027] After the transmission rear cover is processed, the hydraulic system first releases the pressure of the clamping oil circuit. At this time, the top heads of the seven spring-lift external thread support cylinders and the push heads of the two hydraulic lift external thread support cylinders return to the free state. At the same time, the two lever clamping cylinders, the two long-stroke corner clamping cylinders and the release detection corner clamping cylinder perform the release action, and their pressure plates return to the initial position. This completes the release action, and the transmission rear cover product is removed.

[0028] Compared with the prior art, the hydraulic clamp for vertical machining centers provided by this utility model has the following advantages:

[0029] 1. The structure of this utility model is not only applicable to transmission back cover products, but also applicable to the processing of most back cover products.

[0030] 2. This utility model is easy to load and unload, cleverly clamps, intelligently detects, is stable and reliable, and has strong versatility and wide applicability.

[0031] In summary, the transmission rear cover products processed using this hydraulic fixture not only have high machining accuracy but also greater stability. This fixture solution can be applied to most vertical machining centers, can be widely used, and can fundamentally solve previous problems. Attached Figure Description

[0032] Figure 1 This is a front view of the product of this utility model without the transmission rear cover installed;

[0033] Figure 2 This is a right view of the product with the transmission rear cover installed in this utility model;

[0034] Figure 3 This is a left view of the product with the transmission rear cover installed in this utility model;

[0035] Figure 4 This is a right view of the product of this utility model without the transmission rear cover installed;

[0036] Figure 5 This is a left view of the product of this utility model without the transmission rear cover installed;

[0037] Figure 6 This is a rear view of the product of this utility model without the transmission rear cover installed;

[0038] Figure 7 This is a left view of the transmission rear cover product of this utility model;

[0039] Figure 8 This is a right view of the transmission rear cover product of this utility model;

[0040] Figure 9 This is a bottom view of the transmission rear cover product of this utility model;

[0041] Figure 10 This is an enlarged view of the connections between the components on the inner fixing base of this utility model;

[0042] Figure 11 This is a connection diagram of the various components on the outer fixing base of this utility model;

[0043] Figure 12 This is a side view of the outer fixing base of this utility model;

[0044] Reference numerals: 1. Inner side of the square side boss; 2. Positioning pin; 3. Left side of the square side boss; 4. Inner positioning block; 5. Left side of the circular lower side boss; 6. Outer positioning block; 7. Outer side of the circular side boss; 8. Push head; 9. Spring-lift type external threaded support cylinder; 10. Top head; 11. Blank surface below the two notches; 12. Lower side of the circular lower side boss; 13. Positioning pin; 14. Lever clamping cylinder; 16. Right side of the square side boss; 18. Right side of the circular lower side boss. Side view; 19. Release detection type corner clamping cylinder; 21. Short pressure nail; 22. Long stroke corner clamping cylinder; 24. Long pressure nail; 25. Raw surface; 26. Hydraulic lifting type threaded support cylinder; 28. Push cylinder; 30. Base plate; 31. Inner fixed seat; 32. Outer fixed seat; 33. Floating support seat; 34. Inner positioning block adjusting pad; 35. Outer positioning block adjusting pad; 36. Clamping seat; 38. Detection clamping seat; 39. Left support seat; 40. Inner support seat; 41. Right push cylinder seat; 42. Right sequence valve. Detailed Implementation

[0045] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0046] like Figure 1-10 As shown in the figure, a hydraulic clamping fixture for a vertical machining center provided by this utility model embodiment includes: a base plate 30; an inner support seat 40 is provided in the middle of the upper part of the base plate 30; long-stroke corner clamping cylinders 22 are symmetrically arranged on the base plate 30 and on both sides of the inner support seat 40; an inner fixing seat 31 and an outer fixing seat 32 are respectively provided on the base plate 30 and at both ends of the inner support seat 40; both the outer fixing seat 32 and the inner fixing seat 31 are stepped.

[0047] The inner fixing seat 31 has an inner fixing block and three spring-rising external threaded support cylinders 9 respectively installed on the upper surface of its lower end; one of the spring-rising external threaded support cylinders 9 is located near the side of the inner fixing block. The inner fixing block includes a large-diameter end and a small-diameter end; the small-diameter end is located to the right of the large-diameter end; the end of the small-diameter end is movably connected to a positioning post 2; the positioning post 2 is threadedly engaged with the small-diameter end; two hexagonal thin nuts are fitted on the inner end of the positioning post 2; an inner positioning block 4 is installed on the side of the large-diameter end. An inner positioning block adjusting shim 34 is installed between the inner positioning block 4 and the inner fixing block. The positioning post is installed on the upper right part of the inner fixing block. The positioning post has adjustment and locking functions; by turning the knob on the positioning post, its exposed length can be adjusted, and after confirmation, the two hexagonal thin nuts are tightened to lock the positioning post, thus fixing it. The positioning post contacts and positions itself against the inner side of the square side boss of the transmission rear cover. A lever clamping cylinder 14 is provided on one side of the inner fixed seat 31; the pressure plate of the lever clamping cylinder 14 faces the inner support seat 40.

[0048] A spring-loaded external threaded support cylinder 9 is provided on the upper surface of the lower end of the outer fixing seat 32; an outer fixing block is provided on the side of the higher end of the outer fixing seat 32 near the clamping detection seat 38; a lever clamping cylinder 14 is provided on the side of the outer fixing seat 32 and the lower side of the outer fixing block; the pressure plate of the lever clamping cylinder 14 faces the inner support seat 40.

[0049] An outer positioning block adjustment pad 35 is provided between the outer fixing block and the outer fixing seat 32. A mounting hole is provided on the side of the outer fixing block facing away from the outer fixing seat; a push head 8 is movably installed in the mounting hole; an inner hole is provided at the bottom of the push head 8; the lower end of the inner hole is open, and a spring is installed inside the inner hole; one end of the spring is connected to the inner wall of the inner hole; the other end of the spring is connected to the inner wall of the mounting hole; a straight guide groove is provided on the outer wall of the portion of the push head 8 that extends into the mounting hole; a hexagonal set screw passes through the outer fixing block, and its end can extend into the guide groove; the hexagonal set screw is locked onto the outer fixing block by a hexagonal thin nut. A face positioning post 13 is provided on the lower part of the pressure plate end of the long-stroke angle clamping cylinder 22 on the base plate 30.

[0050] The base plate 30 is also provided with a detection clamping seat 38, a left support seat 39, and a right push cylinder seat 41; the detection clamping seat 38 is located on the side of the outer fixed seat 32; the left support seat 39 and the right push cylinder seat 41 are symmetrically arranged on both sides of the inner support seat 40; the inner support seat 40 and the left support seat 39 are respectively provided with hydraulically rising threaded support cylinders 26; the detection clamping seat 38 and the right push cylinder seat 41 are respectively provided with push cylinders 28; the top of the push cylinder 28 faces the top of the hydraulically rising threaded support cylinder 26.

[0051] Two hydraulically raised threaded support cylinders and two push cylinders are set on the outer side of the center of the fixture base plate, arranged at 90°. Each push cylinder has a hydraulically raised threaded support cylinder on the opposite side. This is a very important improvement. After the push cylinder clamps, it applies an appropriate clamping force to the transmission rear cover, which allows the transmission rear cover to withstand greater cutting forces without causing clamping deformation. This improvement effectively increases processing efficiency without sacrificing stability, making it an excellent support and clamping solution.

[0052] The base plate 30 is respectively equipped with a left sequence valve and a right sequence valve 42, which are respectively connected to the oil circuits of the spring-lifting external threaded support cylinder 9, the hydraulic lifting threaded support cylinder 26, the push cylinder 28, the lever clamping cylinder 14, and the long stroke angle clamping cylinder 22.

[0053] Spring-lifting external threaded support cylinders 9 are respectively provided on the inner fixed seat 31, the outer fixed seat 32, the left support seat 39, the right push cylinder seat 41 and the floating support seat 33.

[0054] One is provided on each of the outer fixed seat 32, left support seat 39, right push cylinder seat 41 and floating support seat 33.

[0055] The long-stroke angle clamping cylinder 22 is mounted on the base plate 30 via a clamping seat 36; a long pressure nail 24 is provided downward at the end of the pressure plate of the long-stroke angle clamping cylinder 22.

[0056] The detection clamping seat 38 is provided with a floating support seat 33 on its side; the floating support seat 33 includes: a release detection type corner clamping cylinder 19 is provided on the top of the detection clamping seat 38; and a short pressure nail 21 is provided downward at the end of the pressure plate of the release detection type corner clamping cylinder 19.

[0057] The working process of this hydraulic fixture for a vertical machining center is as follows: First, install the hydraulic fixture onto the worktable of the vertical machining center. Then, move the product with the large end facing up, the square side facing inward, and the round side facing outward, above the fixture. When placing it, ensure that the inner side 1 of the square side boss is close to the positioning post 2, the left side 3 of the square side boss is close to the inner positioning block 4, and the left side 5 of the round lower side boss is close to the outer positioning block 6. Continue to slowly move it into the fixture. The outer side 7 of the round side boss will contact the pushing head 8. Under the action of the chamfered surface, the pushing head... 8 will move outwards, and under the action of the spring force, it will keep pushing against the transmission rear cover product, so that the inner side 1 of the square side boss is always in contact with the positioning post 2, thereby ensuring effective positioning. Continue to slowly put the transmission rear cover product in. The blank surface of the lower side of the large end will contact the top of the seven spring-rising external thread support cylinders 9. Then the top will keep pushing against the transmission rear cover product to play a supporting role. The transmission rear cover product continues to move down against the top until the blank surface 11 of the two notches and the lower side 12 of the circular lower side boss contact and position the three surface positioning posts 13.

[0058] Next, the hydraulic clamping of the machining center is activated. First, the two lever clamping cylinders 14 perform the clamping action. The pressure plate of the lever clamping cylinder 14 on the inner fixed seat 31 is rotated to contact the right side 16 of the square side boss. At the same time, the pressure plate of the lever clamping cylinder 14 on the outer fixed seat is rotated to contact the right side 18 of the circular lower side boss. Then, the transmission rear cover is pushed to the left until the left side 3 of the square side boss contacts and is positioned with the inner positioning block 4, and the left side 5 of the circular lower side boss contacts and is positioned with the outer positioning block 6. Then, the release detection type corner clamping cylinder 19 performs the clamping action. The pressure plate of the release detection type corner clamping cylinder 19 is rotated until the short pressure nail 21 on the pressure plate contacts and clamps the large end face of the circular side. Next, the two long stroke corner clamping cylinders 22 perform the clamping action. The pressure plate of the long stroke corner clamping cylinder 22 is rotated until the long pressure nail 24 on the pressure plate contacts and clamps the blank surface 25 in the two notches on the square side. This completes the positioning and clamping of the transmission rear cover product.

[0059] Next, the seven spring-loaded external threaded support cylinders 9 begin to operate, clamping the top head to prevent loosening during processing. The two hydraulically raised threaded support cylinders 26 begin to operate, extending their top heads and pressing against the outer blank surface of the small end side of the transmission rear cover product. Then, the two push cylinders 28 begin to operate, extending their top heads and pressing against the outer blank surface of the small end side. This completes the support and clamping of the small end side, and the processing of the transmission rear cover product begins.

[0060] After the large end face outside the clamping area of ​​the release detection type corner clamping cylinder 19 is rough-machined, the release detection type corner clamping cylinder 19 performs a release action. The control system then provides air pressure for detection, confirming that the pressure plate of the release detection type corner clamping cylinder 19 has been moved away and is in place, after which machining continues. After the large end face is finish-machined, the release detection type corner clamping cylinder 19 performs a clamping action, rotating the pressure plate of the release detection type corner clamping cylinder 19 and re-clamping the transmission rear cover product. This process continues until the machining of the transmission rear cover product is complete.

[0061] After the transmission rear cover is processed, the hydraulic release of the machining center is activated. At this time, the tops of all the external thread type support cylinders and push cylinders return to their free state. Simultaneously, the two lever clamping cylinders, the two long stroke corner clamping cylinders, and the release detection type corner clamping cylinder perform the release action. Their pressure plates return to their initial positions, thus completing the release action and removing the transmission rear cover product.

[0062] Repeat the above steps when reinstalling the product.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hydraulic clamp for a vertical machining center, characterized by, The utility model relates to a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder.

2. The hydraulic clamp for a vertical machining center according to claim 1, characterized in that, The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder.

3. The hydraulic clamp for a vertical machining center according to claim 1, characterized in that, The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder.

4. The hydraulic clamp for a vertical machining center according to claim 3, characterized in that, The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder.

5. The hydraulic clamp for a vertical machining center according to claim 1, wherein The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder.

6. The hydraulic clamp for a vertical machining center according to claim 1, wherein The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder.

7. The hydraulic clamp for a vertical machining center according to claim 6, wherein The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder.

8. The hydraulic clamp for a vertical machining center according to claim 1, wherein The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder.

9. The hydraulic clamp for a vertical machining center according to claim 1, wherein The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the technical field of long-stroke corner clamping cylinder. The utility model discloses a long-stroke corner clamping cylinder, and relates to the

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