A die positioning structure for a large isothermal forging hydraulic press

Abstract

The application discloses a die positioning structure for a large isothermal forging hydraulic press and relates to the technical field of forging hydraulic presses.The application comprises a press lower base plate, the top of the press lower base plate is provided with a die holder, the top of the die holder is provided with a die core sleeve, four fixing through holes are formed in one end of the die holder and the die core sleeve, and the four fixing through holes are circular and uniformly arranged.The application enables a transmission mechanism to push a clamping plate out of the inside of a receiving groove and embed the clamping plate in the inside of a positioning clamping groove when a hydraulic cylinder drives a pressing plate to push a transmission ring and the top of the die core sleeve, thereby forming accurate and rapid positioning of a die core body, and meanwhile, the application can be connected with a reading meter to visually read the closing degree of the upper and lower dies during forging.The positioning structure effectively reduces the positioning space required for fixing the die core body and improves the applicability of the device.

Description

Technical Field

[0001] This application relates to the field of forging hydraulic press technology, and in particular to a mold positioning structure for a large isothermal forging hydraulic press. Background Technology

[0002] Isothermal forging hydraulic presses are specialized equipment for metal forging within a relatively high temperature range of 700~1000℃, particularly suitable for forging materials such as titanium alloys and aluminum alloys. With the development of industrial technology, the requirements for the precision and efficiency of forging hydraulic presses are becoming increasingly stringent. The die positioning structure, as a crucial component of the hydraulic press, directly affects the forging quality.

[0003] Currently, common press positioning structures include bolt fastening and guide post-guide sleeve guiding. Bolt fastening is widely used due to its simple structure, but its positioning accuracy is relatively low, making it difficult to meet the requirements of high-precision forging. Guide post-guide sleeve guiding is used for die positioning due to its higher positioning accuracy, but the connecting components in this structure are prone to wear due to frequent use, leading to a decrease in die positioning accuracy. The guide post-guide sleeve positioning structure is generally placed between the upper and lower die bases, with the guide post connected to the lower die base and the guide sleeve connected to the upper die base. This structure needs to be evenly distributed at diagonal positions or around the die base to ensure accurate die alignment and reduce uneven loading and wear during use. This improves die lifespan while ensuring the accuracy of forging dimensions.

[0004] Although the guide post-guide sleeve method improves positioning accuracy, its application is limited in open near-isothermal forging, especially in resistance heating furnace type isothermal forging. The furnace body is relatively large, and there is not enough space outside the furnace to install a guide post + guide sleeve device of suitable size, which limits its application in large isothermal forging hydraulic presses. Summary of the Invention

[0005] The purpose of this application is to address the problem that in open near-isothermal forging, especially resistance heating furnace type isothermal forging, the furnace body size is relatively large and there is not enough space outside the furnace to install a guide column + guide sleeve device of suitable size, which reduces the applicability of the device. This application provides a mold positioning structure for large isothermal forging hydraulic presses.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] A mold positioning structure for a large isothermal forging hydraulic press includes a press lower pad, a mold base placed on top of the press lower pad, a mold core sleeve placed on top of the mold base, four fixing holes evenly arranged in a circle at one end of both the mold base and the mold core sleeve, and fixing bolts inserted into the fixing holes, one end of each fixing bolt passing through the fixing hole and threaded with a fixing nut. A mold core body is placed on top of the mold base and inserted into the mold core sleeve, with a suspension above the mold core body. The mold core sleeve has a pressing plate, an upper mold fixedly connected to its bottom, a heat insulation ring fixedly connected to one end of the upper mold, a transmission ring fixedly connected to one end of the heat insulation ring, a hydraulic cylinder fixedly connected to the top of the pressing plate, four drive slots evenly opened on the top of the mold core sleeve, a receiving slot communicating with the inside of the mold core sleeve opened at the bottom of the drive slot, a retaining plate inserted inside the receiving slot, a positioning slot adapted to the retaining plate opened at one end of the mold core body, and a transmission mechanism for driving the retaining plate to embed into the positioning slot installed inside the drive slot.

[0008] By adopting the above technical solution, and by setting up the transmission mechanism in conjunction with the transmission ring, the clamping plate, and the positioning slot, it is convenient for the transmission mechanism to push the clamping plate out of the receiving groove and embed into the positioning slot when the hydraulic cylinder is restarted to drive the pressing plate to push the transmission ring against the top of the mold core sleeve. At the same time, the four clamping plates are embedded into the four positioning slots, forming a rapid positioning of the mold core body. This facilitates the automatic positioning of the mold core body, effectively reduces the positioning space required to fix the mold core body, and improves the applicability of the device.

[0009] Furthermore, the transmission mechanism includes a sector-shaped drive block rotatably connected inside the drive groove. One end of the sector-shaped drive block is fixedly connected to an arc-shaped rack. A transmission gear meshing with the arc-shaped rack is rotatably connected inside the drive groove. A transmission rack meshing with the transmission gear is slidably connected to the bottom of the drive groove. One end of the transmission rack is fixedly connected to an adjusting sleeve rod. One end of the clamping plate is fixedly connected to an adjusting slide rod adapted to the adjusting sleeve rod. An adjusting screw threadedly connected to the adjusting slide rod is rotatably connected inside the adjusting sleeve rod. An operating groove communicating with the drive groove is opened on the outer side of the mold core sleeve. A heat insulation sleeve is fixedly sleeved around the adjusting sleeve rod. A reading meter is fixedly connected to one end of the adjusting sleeve rod. This reading meter can directly read the forging pressure, i.e., the degree of closure of the upper and lower dies. A reset component for pushing the sector-shaped drive block to deflect around the hinge axis is installed inside the drive groove.

[0010] By adopting the above technical solution, and by setting the reset component in conjunction with the arc-shaped rack, transmission gear, and transmission rack, when the transmission ring pushes the sector-shaped drive block to rotate around the hinge axis into the drive groove, it drives the sector-shaped drive block to mesh with the transmission gear, causing the transmission gear to rotate. At the same time, the transmission gear meshes with the transmission rack, pushing the transmission rack to drive the clamping plate into the storage groove, thereby achieving a fixed clamping connection between the mold core body and the mold core sleeve. Then, when the transmission ring releases its contact with the sector-shaped drive block, the reset component quickly pushes out one end of the sector-shaped drive block around the hinge axis and out of the drive groove, thereby causing the arc-shaped rack to mesh with the transmission gear and pushing the transmission rack to drive the clamping plate into the storage groove. This facilitates the release of the fixed clamping connection between the mold core sleeve and the mold core body, thus effectively improving the practicality of the device.

[0011] Furthermore, the reset assembly includes a ceramic ring fixedly sleeved around the outer periphery of the mold core sleeve. A reset slide groove adapted to the drive groove is formed on the outer periphery of the ceramic ring. A T-shaped reset slide rod is slidably connected inside the reset slide groove. A reset spring is fixedly connected to one end of the T-shaped reset slide rod, and the reset spring is installed inside the reset slide groove. The other end of the T-shaped reset slide rod extends into the interior of the drive groove and is fixedly connected to a U-shaped ejector frame. A follower slide groove is symmetrically formed at one end of the U-shaped ejector frame. A follower slide rod adapted to the follower slide groove is symmetrically fixedly connected to one end of the fan-shaped drive block.

[0012] By adopting the above technical solution, and by setting the return spring in conjunction with the follower slide and the follower slide rod, it is convenient to utilize the rebound characteristics of the return spring when the hydraulic cylinder drives the pressing plate to disengage the transmission ring from the mold core sleeve. This allows the return spring to push out the T-shaped return slide rod along the length of the return slide, and the T-shaped return slide rod drives the U-shaped ejector frame to push the follower slide rod and the sector drive block out of the drive groove around the hinge axis. At the same time, the follower slide rod slides along the inner wall of the follower slide, thereby facilitating the automatic ejection of the sector drive block around the hinge axis into the drive groove, effectively improving the practicality of the device.

[0013] Furthermore, the top of the fan-shaped drive block is rotatably connected to an abutment roller, which forms a rolling abutment with the transmission ring.

[0014] By adopting the above technical solution, and by setting the contact roller and the sector drive block to work together, the sector drive block forms a rolling contact with the transmission ring through the contact roller, which effectively reduces the wear between the transmission ring and the sector drive block and extends the service life of the device.

[0015] Furthermore, a high-temperature pad is placed on the top of the mold base, and the high-temperature pad is installed between the mold core sleeve and the mold base. A heat insulation pad is placed on the top of the mold base, and the heat insulation pad is installed between the high-temperature pad and the mold base.

[0016] By adopting the above technical solution and using a combination of high-temperature pads and heat insulation pads, the heat resistance and insulation performance of the mold base are effectively improved.

[0017] Furthermore, a positioning groove is symmetrically provided at the center of the high-temperature pad and the heat insulation pad, and a positioning groove adapted to the high-temperature pad and the heat insulation pad is provided at the top of the mold base and the bottom of the mold core sleeve, and a rectangular positioning key is inserted inside the positioning groove.

[0018] By adopting the above technical solution, and by using the positioning groove in conjunction with the rectangular positioning key, the connection strength and stability between the mold base and the high-temperature pad and the heat insulation pad are effectively improved, thus enhancing the overall integrity of the device.

[0019] Furthermore, four positioning grooves are provided on the top of the press lower pad and the bottom of the mold base. The four positioning grooves are respectively located in the middle section of the four sides of the press lower pad and the mold base. Positioning blocks are inserted inside the positioning grooves. Interconnected positioning grooves are provided in the middle section of the press lower pad and the mold base. Circular positioning keys are inserted inside the positioning grooves.

[0020] By adopting the above technical solution, and by setting up positioning groove two in conjunction with positioning block, positioning groove three, and circular positioning key one, the connection strength and stability between the press lower pad and the mold base are effectively improved, and the overall integrity of the device is further enhanced.

[0021] Furthermore, both the top of the mold core sleeve and the bottom of the mold core body are provided with positioning grooves four, and a circular positioning key two is inserted into the interior of the positioning grooves four.

[0022] By adopting the above technical solution, and by using the combination of positioning groove four and circular positioning key two, the connection strength and stability between the mold core body and the mold base are effectively improved, and the overall integrity of the device is further enhanced.

[0023] In summary, this application includes at least one of the following beneficial effects:

[0024] 1. By setting up a transmission mechanism in conjunction with a transmission ring, a clamping plate, and a positioning slot, the hydraulic cylinder can be restarted to drive the pressing plate to push the transmission ring onto the outside of the mold core body and squeeze the top of the mold core sleeve. This causes the transmission mechanism to push the clamping plate out of the receiving groove and embed it into the positioning slot. As a result, the transmission ring wraps and limits the connection between the mold core body and the upper mold, reducing the overflow of the mold core body. At the same time, the four clamping plates are embedded in the four positioning slots to quickly position the mold core body, thereby facilitating automatic positioning of the mold core body. This effectively reduces the positioning space required to fix the mold core body and improves the applicability of the device.

[0025] 2. By setting up a reset component in conjunction with the arc-shaped rack, transmission gear, and transmission rack, when the transmission ring pushes the sector-shaped drive block to rotate around the hinge axis into the drive groove, it drives the sector-shaped drive block to mesh with the transmission gear, causing the transmission gear to rotate. At the same time, the transmission gear meshes with the transmission rack, pushing the transmission rack to drive the clamping plate to embed into the storage groove, thereby achieving a fixed clamping connection between the mold core body and the mold core sleeve, effectively improving the practicality of the device.

[0026] 3. By setting up a return spring in conjunction with the follower slide and follower slide rod, it is convenient to utilize the rebound characteristics of the return spring when the hydraulic cylinder drives the pressing plate to disengage the transmission ring from the mold core sleeve. This allows the return spring to push out the T-shaped return slide rod along the length of the return slide, and the T-shaped return slide rod drives the U-shaped ejector frame to push the follower slide rod and the sector drive block out of the drive groove around the hinge axis. At the same time, the follower slide rod slides along the inner wall of the follower slide, which facilitates the automatic ejection of the sector drive block around the hinge axis into the drive groove, effectively improving the practicality of the device. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the main body of the device in this application.

[0028] Figure 2 This is a diagonal sectional view of the mold base in this application.

[0029] Figure 3 This is an exploded view of the internal structure of the mold base in this application.

[0030] Figure 4 This is an exploded view of the internal structure of the drive slot in this application.

[0031] Figure 5 This is an exploded three-dimensional view of the reset component in this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Press lower pad; 2. Mold base; 3. Mold core sleeve; 4. Fixing through hole; 5. Fixing bolt; 6. Fixing nut; 7. Mold core body; 8. Pressing plate; 9. Upper mold; 10. Heat insulation ring; 11. Transmission ring; 12. Contact spring; 13. Drive groove; 14. Storage groove; 15. Clamping plate; 16. Positioning groove; 17. Fan-shaped drive block; 18. Arc-shaped rack; 19. Transmission gear; 20. Transmission rack; 21. Reset slide groove; 22. T-shaped reset slide bar; 23. Reset spring; 24. U 25. Top ejector frame; 26. Follower slide rail; 27. Follower slide rod; 28. Abutment roller; 29. ​​High temperature pad; 30. Heat insulation pad; 31. Positioning slot one; 32. Rectangular positioning key; 33. Positioning slot two; 34. Positioning block; 35. Positioning slot three; 36. Circular positioning key one; 37. Positioning slot four; 38. Circular positioning key two; 39. Hydraulic cylinder; 40. Adjusting sleeve rod; 41. Adjusting slide rod; 42. Adjusting screw; 43. Operating slot; 44. Ceramic ring; 45. Heat insulation sleeve; 46. Reading gauge. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 —5 provides further details regarding this application.

[0035] This application discloses a mold positioning structure for a large isothermal forging hydraulic press.

[0036] Reference Figure 1 - Figure 4 A mold positioning structure for a large isothermal forging hydraulic press includes a press lower pad 1, a mold base 2 placed on top of the press lower pad 1, a mold core sleeve 3 placed on top of the mold base 2, four fixing holes 4 evenly arranged in a circle on one end of both the mold base 2 and the mold core sleeve 3, and fixing bolts 5 inserted inside the fixing holes 4, one end of the fixing bolts 5 passing through the fixing holes 4 and threadedly connected to fixing nuts 6. A mold core body 7 is placed on top of the mold base 2 and inserted inside the mold core sleeve 3. A pressing plate 8 is suspended above the mold core body 7 for pressing. The bottom of the plate 8 is fixedly connected to the upper mold 9, one end of the upper mold 9 is fixedly connected to the heat insulation ring 10, one end of the heat insulation ring 10 is fixedly connected to the transmission ring 11, the top of the pressing plate 8 is fixedly connected to the hydraulic cylinder 38, the top of the mold core sleeve 3 is evenly provided with four drive slots 13, the bottom of the drive slot 13 is provided with a storage slot 14 that communicates with the inside of the mold core sleeve 3, a card plate 15 is inserted into the storage slot 14, one end of the mold core body 7 is provided with a positioning slot 16 that matches the card plate 15, and a transmission mechanism for driving the card plate 15 to embed into the positioning slot 16 is installed inside the drive slot 13.

[0037] The transmission mechanism includes a sector-shaped drive block 17 rotatably connected inside the drive groove 13. One end of the sector-shaped drive block 17 is fixedly connected to an arc-shaped rack 18. The drive groove 13 is rotatably connected to a transmission gear 19 that meshes with the arc-shaped rack 18. The bottom of the drive groove 13 is slidably connected to a transmission rack 20 that meshes with the transmission gear 19. One end of the transmission rack 20 is fixedly connected to an adjusting sleeve rod 39. One end of the clamping plate 15 is fixedly connected to an adjusting slide rod 40 that is adapted to the adjusting sleeve rod 39. The adjusting sleeve rod 39 is rotatably connected to an adjusting screw 41 that is threadedly connected to the adjusting slide rod 40. The outer side of the mold core sleeve 3 is provided with an operating groove 42 that communicates with the drive groove 13. A heat insulation sleeve 44 is fixedly sleeved around the adjusting sleeve rod 39. One end of the adjusting sleeve rod 39 is fixedly connected to a reading meter 45. The drive groove 13 is equipped with a reset assembly for pushing the sector-shaped drive block 17 to deflect around the hinge axis. One end of the adjusting sleeve rod 39 passes through the furnace wall and extends to the outside of the furnace chamber.

[0038] In use, firstly, the fixing bolt 5 is pulled through the fixing hole 4 at one end of the mold core sleeve 3 and the mold base 2, and the fixing nut 6 is tightened to form a threaded connection with the fixing bolt 5, thereby realizing the fixed connection between the mold base 2 and the mold core sleeve 3. Then, the mold core body 7 is pulled and inserted into the interior of the mold core sleeve 3, so that the positioning slot 16 is aligned with the receiving slot 14. Next, the processing material is placed into the interior of the mold core body 7, and the hydraulic cylinder 38 is activated to drive the pressing plate 8 to move the upper mold 9 downward along the length direction of the heat insulation ring 10. At the same time, when the pressing plate 8 drives the upper mold 9 to push the raw material into the interior of the mold core body 7, the pressing plate 8 pushes the transmission ring 11 to form an abutment with the top of the mold core sleeve 3.

[0039] Simultaneously, the transmission ring 11 pushes the sector-shaped drive block 17 to rotate inside the drive groove 13 around the hinge axis, causing the sector-shaped drive block 17 to drive the arc-shaped rack 18 to mesh with the transmission gear 19. This causes the transmission gear 19 to rotate and mesh with the transmission rack 20, thereby causing the transmission gear 19 to push the transmission rack 20 along the length direction of the mold core sleeve 3 into the positioning slot 16. This causes the transmission rack 20 to push the clamping plate 15 out of the receiving groove 14 and into the positioning slot 16, thus causing the four clamping plates 15 to be pushed out of the receiving groove 14 and into the positioning slot 16, forming a clamping and fixing of the mold core body 7, thereby facilitating the passage of... The transfer of the push plate 15 within the storage slot 14 and the positioning slot 16 enables automatic positioning of the mold core body 7, effectively reducing the positioning space required to fix the mold core body 7 and improving the applicability of the device. Furthermore, the aforementioned arc-shaped rack 18, transmission gear 19, and transmission rack 20 are all made of 316 stainless steel, which has good high-temperature resistance up to 1700°C and is not prone to deformation during high-temperature production. A reading meter 45 is set to measure the downward pressure of the transmission ring 11. When the transmission ring 11 is completely in contact with the mold core sleeve 3, the reading of the reading meter 45 is 30mm, with a reading range of 0-30mm, to ensure that the downward pressure of the transmission ring is controllable.

[0040] Furthermore, when it is necessary to replace the mold core body 7 of different sizes, the adjusting screw 41 can be rotated by using tools such as a hex wrench, so that the adjusting screw 41 and the adjusting slide 40 form a threaded connection, and push the clamping plate 15 out along the length direction of the adjusting slide 40. This allows the four clamping plates 15 to move in a centered manner around the mold core body 7, thereby allowing the clamping plates 15 to adjust the ejection length according to the change of the diameter of the mold core body 7, further improving the applicability of the device.

[0041] Reference Figure 2 - Figure 5 The reset assembly includes a ceramic ring 43 fixedly sleeved around the outer periphery of the mold core sleeve 3. A reset slide groove 21 adapted to the drive groove 13 is opened around the outer periphery of the ceramic ring 43. A T-shaped reset slide rod 22 is slidably connected inside the reset slide groove 21. A reset spring 23 is fixedly connected to one end of the T-shaped reset slide rod 22. The reset spring 23 is installed inside the reset slide groove 21. The other end of the T-shaped reset slide rod 22 extends into the interior of the drive groove 13 and is fixedly connected to a U-shaped ejector frame 24. A follower slide groove 25 is symmetrically opened at one end of the U-shaped ejector frame 24. A follower slide rod 26 adapted to the follower slide groove 25 is symmetrically fixedly connected to one end of the fan-shaped drive block 17.

[0042] In use, when the reverse-starting hydraulic cylinder 38 drives the transmission ring 11 to disengage from the sector-shaped drive block 17, the return spring 23 is released from its force and rebounds, pushing the T-shaped return slide rod 22 to move along the length of the return slide groove 21. At the same time, the T-shaped return slide rod 22 pushes the U-shaped ejector frame 24 to drive the follower slide groove 25 to move closer to the sector-shaped drive block 17 along the length of the return slide groove 21. The U-shaped ejector frame 24 pushes the follower slide rod 26 to push the sector-shaped drive block 17 out of the drive groove 13 around the hinge shaft. At the same time, the U-shaped ejector frame 24 pushes the follower slide rod 26 to slide along the follower slide groove 25. Meanwhile, the heat insulation sleeve 44 is set to provide heat insulation protection for the T-shaped return slide rod 22, improving the high-temperature resistance of the T-shaped return slide rod 22. This facilitates the automatic pushing of the sector-shaped drive block 17 out of the drive groove 13 around the hinge shaft, effectively improving the practicality of the device.

[0043] Reference Figure 3 - Figure 5 The top of the fan-shaped drive block 17 is rotatably connected to an abutment roller 27, which forms a rolling abutment with the transmission ring 11.

[0044] When in use, when the hydraulic cylinder 38 pushes the pressing plate 8 to cause the transmission ring 11 to come into contact with the sector drive block 17, the transmission ring 11 forms a rolling contact with the sector drive block 17 through the contact roller 27, thereby effectively reducing the wear between the transmission ring 11 and the sector drive block 17, improving the deflection smoothness of the sector drive block 17, and extending the service life of the device.

[0045] Reference Figure 1 - Figure 3 A high-temperature pad 28 is placed on the top of the mold base 2. The high-temperature pad 28 is installed between the mold core sleeve 3 and the mold base 2. A heat insulation pad 29 is placed on the top of the mold base 2. The heat insulation pad 29 is installed between the high-temperature pad 28 and the mold base 2.

[0046] Among them, the high temperature pad 28 and the heat insulation pad 29 are symmetrically provided with positioning grooves 30, and the top of the mold base 2 and the bottom of the mold core sleeve 3 are provided with positioning grooves 30 that are adapted to the high temperature pad 28 and the heat insulation pad 29. A rectangular positioning key 31 is inserted inside the positioning groove 30.

[0047] Furthermore, four positioning slots 32 are provided on the top of the press lower pad 1 and the bottom of the mold base 2. The four positioning slots 32 are respectively provided in the middle section of the four sides of the press lower pad 1 and the mold base 2. Positioning blocks 33 are inserted inside the positioning slots 32. Interconnected positioning slots 34 are provided in the middle section of the press lower pad 1 and the mold base 2. Circular positioning keys 35 are inserted inside the positioning slots 34.

[0048] Furthermore, both the top of the mold core sleeve 3 and the bottom of the mold core body 7 are provided with positioning grooves 36, and circular positioning keys 37 are inserted inside the positioning grooves 36.

[0049] In use, firstly, a positioning block 33 is inserted into the positioning groove 32 at the top of the press lower pad 1, and at the same time, a circular positioning key 35 is placed inside the positioning groove 34. Then, the mold base 2 is hoisted to the top of the press lower pad 1, and the positioning groove 32 at the bottom is aligned with the positioning block 33 and the circular positioning key 35 with the positioning groove 34 by manually pulling the mold base 2. This achieves axial and horizontal engagement between the press lower pad 1 and the mold base 2, reduces the offset between the press lower pad 1 and the mold base 2 due to force, and improves the connection stability between the press lower pad 1 and the mold base 2.

[0050] Then, a rectangular positioning key 31 is placed inside the positioning groove 30 at the top of the mold base 2, and the heat insulation pad 29 is hoisted and placed on top of the mold base 2. At the same time, the heat insulation pad 29 is pulled to move the positioning groove 30 at the bottom to fit the rectangular positioning key 31 at the top of the mold base 2. Next, a rectangular positioning key 31 is placed inside the positioning groove 30 at the top of the heat insulation pad 29, and a high-temperature pad 28 is hoisted and placed on top of the heat insulation pad 29. At the same time, the high-temperature pad 28 is pulled to move the positioning groove 30 at the bottom to fit the rectangular positioning key 31 at the top of the heat insulation pad 29. Next, the mold core sleeve 3 is hoisted and placed on top of the high-temperature pad 28, and the positioning groove 30 at the bottom of the mold core sleeve 3 is moved to fit the rectangular positioning key 31 at the top of the high-temperature pad 28. Finally, one end of the fixing bolt 5 is pulled through the fixed bolt. The die is fixed by drilling through hole 4 and tightening the fixing nut 6 to achieve a fixed connection between the die base 2 and the heat insulation pad 29, the high temperature pad 28, and the die core sleeve 3. This effectively improves the connection stability between the die base 2 and the heat insulation pad 29, the high temperature pad 28, and the die core sleeve 3. At the same time, the high temperature pad 28 and the heat insulation pad 29 effectively improve the high temperature resistance and heat insulation performance of the die base 2. Then, a circular positioning key 2 37 is placed inside the positioning groove 4 36 opened at the top of the die base 2, and the die core body 7 is hoisted and inserted into the inside of the die core sleeve 3. This allows the die core body 7 to drive the positioning groove 4 36 opened at the bottom to wrap around the top of the circular positioning key 2 37, thereby achieving a quick snap-fit ​​between the die core body 7 and the die base 2. This reduces the possibility of the die core body 7 shifting under force and improves the practicality of the device.

[0051] The implementation principle of the mold positioning structure for a large isothermal forging hydraulic press in this embodiment is as follows: First, the fixing bolt 5 is pulled through the fixing hole 4 at one end of the mold core sleeve 3 and the mold base 2, and the fixing nut 6 is tightened to form a threaded connection with the fixing bolt 5, thereby realizing the fixed connection between the mold base 2 and the mold core sleeve 3. Then, the mold core body 7 is pulled and inserted into the interior of the mold core sleeve 3, so that the positioning slot 16 is aligned with the receiving slot 14. At the same time, when it is necessary to replace the mold core body 7 of different sizes, the adjusting screw 41 can be rotated by using tools such as a hex wrench, so that the adjusting screw 41 and the adjusting slide rod 40 form a threaded connection, and push the clamping plate 15 out along the length direction of the adjusting slide rod 40, so that the four clamping plates 15 move in a centered manner with the mold core body 7 as the center, thereby allowing the clamping plates 15 to adjust the ejection length as the diameter of the mold core body 7 changes.

[0052] Next, the processing material is placed inside the mold core body 7, and the hydraulic cylinder 38 is activated to drive the pressing plate 8 to move the upper mold 9 downward. At the same time, as the pressing plate 8 drives the upper mold 9 to push the raw material into the mold core body 7, the pressing plate 8 pushes the transmission ring 11 to form an abutment with the top of the mold core sleeve 3.

[0053] Simultaneously, the transmission ring 11 pushes the fan-shaped drive block 17 to rotate inside the drive groove 13 around the hinge axis, and the fan-shaped drive block 17 drives the arc-shaped rack 18 to mesh with the transmission gear 19, thereby causing the transmission gear 19 to rotate and mesh with the transmission rack 20. This causes the transmission gear 19 to push the transmission rack 20 to move along the length direction of the mold core sleeve 3 into the positioning slot 16, thereby causing the transmission rack 20 to push the card plate 15 out of the storage slot 14 and into the positioning slot 16. This causes the four card plates 15 to be pushed out of the storage slot 14 and into the positioning slot 16, thus clamping and fixing the mold core body 7.

[0054] Then, when the reverse-starting hydraulic cylinder 38 drives the transmission ring 11 to disengage from one end of the mold core body 7, the transmission ring 11 disengages from the contact with the sector-shaped drive block 17. At this time, the return spring 23 is released from its force and rebounds to push the T-shaped return slide rod 22 to move along the length direction of the return slide groove 21. At the same time, the T-shaped return slide rod 22 pushes the U-shaped ejector frame 24 to drive the follower slide groove 25 to move closer to the sector-shaped drive block 17 along the length direction of the return slide groove 21. The U-shaped ejector frame 24 pushes the follower slide rod 26 to drive the sector-shaped drive block 17 to be ejected from the interior of the drive groove 13 around the hinge axis. At the same time, the U-shaped ejector frame 24 pushes the follower slide rod 26 to slide along the interior of the follower slide groove 25.

Claims

1. A mold positioning structure for a large isothermal forging hydraulic press, comprising a press lower pad (1), characterized in that: A mold base (2) is placed on the top of the press lower pad (1), and a mold core sleeve (3) is placed on the top of the mold base (2). Four fixing holes (4) are provided at one end of both the mold base (2) and the mold core sleeve (3). The four fixing holes (4) are arranged in a circular and uniform pattern. A fixing bolt (5) is inserted into the inside of each fixing hole (4). One end of the fixing bolt (5) passes through the fixing hole (4) and is threaded with a fixing nut (6). A mold core body (7) is placed on the top of the mold base (2). The mold core body (7) is inserted into the inside of the mold core sleeve (3). A pressing plate (8) is suspended above the mold core body (7). An upper mold is fixedly connected to the bottom of the pressing plate (8). 9), one end of the upper mold (9) is fixedly connected to a heat insulation ring (10), one end of the heat insulation ring (10) is fixedly connected to a transmission ring (11), the top of the pressing plate (8) is fixedly connected to a hydraulic cylinder (38), the top of the mold core sleeve (3) is evenly provided with four drive slots (13), the bottom of the drive slot (13) is provided with a storage slot (14) communicating with the inside of the mold core sleeve (3), a card plate (15) is inserted inside the storage slot (14), one end of the mold core body (7) is provided with a positioning slot (16) adapted to the card plate (15), and the inside of the drive slot (13) is equipped with a transmission mechanism for driving the card plate (15) to embed into the positioning slot (16). The transmission mechanism includes a sector-shaped drive block (17) rotatably connected inside the drive groove (13). One end of the sector-shaped drive block (17) is fixedly connected to an arc-shaped rack (18). Inside the drive groove (13), a transmission gear (19) meshes with the arc-shaped rack (18). The bottom of the drive groove (13) is slidably connected to a transmission rack (20) meshing with the transmission gear (19). One end of the transmission rack (20) is fixedly connected to an adjusting sleeve rod (39). One end of the clamping plate (15) is fixedly connected to the adjusting sleeve rod. (39) A matching adjusting slide rod (40) is rotatably connected to an adjusting screw (41) threadedly connected to the adjusting slide rod (40) inside the adjusting sleeve rod (39). An operating groove (42) communicating with the drive groove (13) is opened on the outer side of the mold core sleeve (3). A heat insulation sleeve (44) is fixedly sleeved on the outer periphery of the adjusting sleeve rod (39), and a reading meter (45) is fixedly connected to one end of the adjusting sleeve rod (39). A reset component for pushing the fan-shaped drive block (17) to deflect around the hinge axis is installed inside the drive groove (13).

2. The mold positioning structure for a large isothermal forging hydraulic press according to claim 1, characterized in that: The reset assembly includes a ceramic ring (43) fixedly sleeved around the core sleeve (3). The ceramic ring (43) has a reset slide groove (21) adapted to the drive groove (13) on its periphery. A T-shaped reset slide rod (22) is slidably connected inside the reset slide groove (21). A reset spring (23) is fixedly connected to one end of the T-shaped reset slide rod (22). The reset spring (23) is installed inside the reset slide groove (21). The other end of the T-shaped reset slide rod (22) extends into the drive groove (13) and is fixedly connected to a U-shaped ejector frame (24). A follower slide groove (25) is symmetrically opened at one end of the U-shaped ejector frame (24). A follower slide rod (26) adapted to the follower slide groove (25) is symmetrically fixedly connected to one end of the fan-shaped drive block (17).

3. The mold positioning structure for a large isothermal forging hydraulic press according to claim 1, characterized in that: The top of the fan-shaped drive block (17) is rotatably connected to an abutment roller (27), which forms a rolling abutment with the transmission ring (11).

4. The mold positioning structure for a large isothermal forging hydraulic press according to claim 1, characterized in that: A high-temperature pad (28) is placed on the top of the mold base (2), and the high-temperature pad (28) is installed between the mold core sleeve (3) and the mold base (2). A heat insulation pad (29) is placed on the top of the mold base (2), and the heat insulation pad (29) is installed between the high-temperature pad (28) and the mold base (2).

5. A mold positioning structure for a large isothermal forging hydraulic press according to claim 4, characterized in that: The high-temperature pad (28) and the heat insulation pad (29) are symmetrically provided with positioning grooves (30). The top of the mold base (2) and the bottom of the mold core sleeve (3) are provided with positioning grooves (30) that are adapted to the high-temperature pad (28) and the heat insulation pad (29). A rectangular positioning key (31) is inserted inside the positioning groove (30).

6. A mold positioning structure for a large isothermal forging hydraulic press according to claim 1, characterized in that: The top of the press lower pad (1) and the bottom of the mold base (2) are provided with four positioning grooves (32). The four positioning grooves (32) are respectively opened in the middle section of the four sides of the press lower pad (1) and the mold base (2). Positioning blocks (33) are inserted inside the positioning grooves (32). The middle section of the press lower pad (1) and the mold base (2) is provided with interconnected positioning grooves (34). A circular positioning key (35) is inserted inside the positioning grooves (34).

7. A mold positioning structure for a large isothermal forging hydraulic press according to claim 1, characterized in that: The top of the mold core sleeve (3) and the bottom of the mold core body (7) are both provided with positioning groove four (36), and a circular positioning key two (37) is inserted inside the positioning groove four (36).

Images