Die positioning structure for large isothermal forging hydraulic press

Abstract

The invention discloses a die positioning structure for a large isothermal forging hydraulic press, and relates to the technical field of forging hydraulic presses. The pressing machine comprises a pressing machine lower base plate, a die holder is placed on the top of the pressing machine lower base plate, a die core sleeve is placed on the top of the die holder, and four fixing penetrating holes are formed in one end of the die holder and one end of the die core sleeve and are evenly arranged in a circle shape. When a hydraulic cylinder is started to drive a pressing plate to push a transmission ring to abut against the top of a die core sleeve, a transmission mechanism pushes a clamping plate to be ejected out of a containing groove and embedded into a positioning clamping groove, a die core body is accurately and rapidly positioned, and meanwhile the closing degree of an upper die and a lower die during forging can be visually read through connection with a reading meter. According to the positioning structure, the positioning space required for fixing the mold core body is effectively reduced, and the applicability of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic forging presses, and in particular to a die positioning structure for a large isothermal hydraulic forging press. Background Art

[0002] Isothermal forging hydraulic press is a special equipment for metal forging in a relatively high temperature range of 700~1000℃, especially suitable for forging materials such as titanium alloy and aluminum alloy. With the development of industrial technology, the requirements for the precision and efficiency of forging hydraulic press are getting higher and higher. As an important part of hydraulic press, the performance of die positioning structure directly affects the forging quality.

[0003] At present, common press positioning structures include bolt fastening method and guide pin-guide sleeve guiding method. The bolt fastening method is widely used due to its simple structure, but its positioning accuracy is relatively low and it is difficult to meet the needs of high-precision forging. The guide pin-guide sleeve guiding method is applied to mold positioning due to its high positioning accuracy, but the connecting parts of this structure are prone to wear due to frequent use, which leads to a decrease in mold positioning accuracy. The guide pin-guide sleeve positioning structure is generally placed between the upper and lower die bases, with the guide pin connected to the lower die base and the guide sleeve connected to the upper die base. The structure needs to be evenly arranged at the diagonal position of the die base or around the die base to ensure accurate centering of the die and reduce the eccentric load and eccentric wear of the die during use. While increasing the service life of the die, the accuracy of the forging size can be guaranteed.

[0004] Although the guide pin-guide sleeve method has improved positioning accuracy, its application is limited in open near-isothermal forging, especially in isothermal forging with resistance heating furnaces. The furnace size is relatively large, and there is not enough space outside the furnace to install a guide pin + guide sleeve device of appropriate size, which limits its application in large isothermal forging hydraulic presses. Summary of the invention

[0005] The purpose of the present application is to solve the problem that in open near-isothermal forging, especially isothermal forging with a resistive heating furnace, the furnace body size is relatively large, and there is insufficient space outside the furnace to install a guide pin + guide sleeve device of appropriate size, which reduces the applicability of the device. The present application provides a mold positioning structure for a large isothermal forging hydraulic press.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A die positioning structure for a large isothermal forging hydraulic press comprises a press lower pad, a die base is placed on the top of the press lower pad, a die core sleeve is placed on the top of the die base, four fixing through holes are opened at one end of the die base and the die core sleeve, the four fixing through holes are evenly arranged in a circle, a fixing bolt is inserted inside the fixing through hole, one end of the fixing bolt passes through the fixing through hole and is threadedly connected with a fixing nut, a die core body is placed on the top of the die base, the die core body is inserted inside the die core sleeve, and a die core body is suspended above the die core body. There is a pressing plate, the bottom of the pressing plate is fixedly connected to an upper mold, one end of the upper mold is fixedly connected to an insulation ring, one end of the insulation ring is fixedly connected to a transmission ring, the top of the pressing plate is fixedly connected to a hydraulic cylinder, four driving grooves are evenly arranged on the top of the core sleeve, a receiving groove connected to the inside of the core sleeve is arranged at the bottom of the driving groove, a card plate is inserted into the inside of the receiving groove, a positioning card groove adapted to the card plate is arranged at one end of the core body, and a transmission mechanism for driving the card plate to be embedded in the positioning card groove is installed inside the driving groove.

[0007] By adopting the above technical scheme, by setting the transmission mechanism and the coordinated use of the transmission ring, the clamping plate and the positioning slot, it is convenient to restart the hydraulic cylinder to drive the pressing plate to push the transmission ring to contact the top of the core sleeve, so that the transmission mechanism pushes the clamping plate out of the storage groove and embeds it into the positioning slot. At the same time, the four clamping plates are embedded in the four positioning slots to form a rapid positioning of the core body, thereby facilitating the automatic positioning of the core body, effectively reducing the positioning space required for fixing the core body, and improving the applicability of the device.

[0008] Furthermore, the transmission mechanism includes a fan-shaped driving block rotatably connected to the driving groove, one end of the fan-shaped driving block is fixedly connected to an arc rack, the driving groove is internally rotatably connected to a transmission gear meshing with the arc rack, the bottom of the driving groove is slidably connected to a transmission rack meshing with the transmission gear, 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, the adjusting sleeve rod is internally rotatably connected to an adjusting screw threadedly connected to the adjusting slide rod, an operating groove communicating with the driving groove is provided on the outer side of the core sleeve, an insulating sleeve is fixedly provided on the outer periphery of the adjusting sleeve rod, and a reading meter is fixedly connected to one end of the adjusting sleeve rod, the reading meter can intuitively read the forging pressure amount, that is, the degree of closing of the upper and lower molds, and a reset component for pushing the fan-shaped driving block to deflect around the hinge shaft is installed inside the driving groove.

[0009] By adopting the above technical scheme, by setting the reset component and the coordinated use of the arc rack, the transmission gear and the transmission rack, when the transmission ring pushes the fan-shaped drive block to rotate around the hinge axis into the driving groove, the fan-shaped drive block is driven to engage with the transmission gear, so that the transmission gear rotates, and at the same time the transmission gear is engaged with the transmission rack, and the transmission rack is pushed to drive the card plate to embed into the storage groove to achieve fixed clamping of the core body and the core sleeve, and then when the transmission ring is released from the interference of the fan-shaped drive block, the reset component is quickly pushed out of the driving groove around the hinge axis at one end of the fan-shaped drive block, so that the arc rack is engaged with the transmission gear, and the transmission rack is pushed to drive the card plate to retract into the storage groove, so as to facilitate the release of the fixed clamping of the core sleeve and the core body, thereby effectively improving the practicality of the device.

[0010] Furthermore, the reset assembly includes a ceramic ring fixedly mounted on the periphery of the core sleeve, a reset slide groove adapted to the drive groove is opened on the periphery of the ceramic ring, a T-shaped reset slide rod is slidably connected inside the reset slide groove, one end of the T-shaped reset slide rod is fixedly connected to a reset spring, the reset spring is installed inside the reset slide groove, the other end of the T-shaped reset slide rod extends to the inside of the drive groove and is fixedly connected to a U-shaped ejector frame, one end of the U-shaped ejector frame is symmetrically opened with a follower slide groove, and one end of the fan-shaped drive block is symmetrically fixedly connected with a follower slide rod adapted to the follower slide groove.

[0011] By adopting the above technical scheme, by setting the coordinated use of the return spring, the follower slide groove and the follower slide rod, it is convenient to use the rebound characteristics of the return spring when the hydraulic cylinder is started to drive the pressing plate to drive the transmission ring to disengage from the interference with the core sleeve, so that the return spring can be ejected out of the T-shaped return slide rod along the length direction of the return slide groove, and the T-shaped return slide rod drives the U-shaped ejection frame to push the follower slide rod and the fan-shaped drive block to be ejected out of the interior of the drive groove around the hinge shaft, and at the same time, the follower slide rod slides along the inner wall of the follower slide groove, so as to facilitate the push of the fan-shaped drive block to automatically eject the interior of the drive groove around the hinge shaft, thereby effectively improving the practicability of the device.

[0012] Furthermore, a top of the sector-shaped driving block is rotatably connected to a contact roller, and the contact roller forms a rolling contact with the transmission ring.

[0013] By adopting the above technical solution, by setting the cooperation between the resistance roller and the fan-shaped drive block, the fan-shaped drive block forms a rolling resistance with the transmission ring through the resistance roller, which effectively reduces the wear between the transmission ring and the fan-shaped drive block and extends the service life of the device.

[0014] Furthermore, a high-temperature pad is placed on the top of the mold base, and the high-temperature pad is installed between the core sleeve and the mold base. An insulating pad is placed on the top of the mold base, and the insulating pad is installed between the high-temperature pad and the mold base.

[0015] By adopting the above technical solution, the heat resistance and temperature insulation performance of the mold base are effectively improved by arranging the high-temperature pad and the heat-insulating pad for use in combination.

[0016] Furthermore, a positioning groove is symmetrically provided at the center of the high-temperature pad and the thermal insulation pad, and a positioning groove adapted to the high-temperature pad and the thermal insulation pad is provided at the top of the mold base and the bottom of the core sleeve, and a rectangular positioning key is inserted inside the positioning groove.

[0017] By adopting the above technical solution, by setting the positioning groove and using it in conjunction with the rectangular positioning key, the connection strength and stability between the mold base and the high-temperature pad and the insulation pad are effectively improved, and the integrity of the device is improved.

[0018] Furthermore, four positioning grooves 2 are provided on the top of the press lower pad and the bottom of the mold base, and the four positioning grooves 2 are respectively provided in the middle sections of the four sides of the press lower pad and the mold base, and positioning blocks are inserted into the positioning grooves 2. The middle sections of the press lower pad and the mold base are provided with positioning grooves 3 that are interconnected, and a circular positioning key 1 is inserted into the positioning grooves 3.

[0019] By adopting the above technical solution, by setting the positioning groove two and the positioning block, the positioning groove three, and the circular positioning key one, the connection strength and stability between the lower pad of the press and the die base are effectively improved, and the integrity of the device is further improved.

[0020] Furthermore, a positioning groove four is provided at the top of the core sleeve and the bottom of the core body, and a circular positioning key two is inserted into the positioning groove four.

[0021] By adopting the above technical solution, by setting the positioning groove four and the circular positioning key two, the connection strength and stability between the mold core body and the mold base are effectively improved, and the integrity of the device is further improved.

[0022] In summary, the present application includes at least one of the following beneficial effects: 1. By setting up the transmission mechanism and the coordinated use of the transmission ring, the clamping plate and the positioning slot, it is convenient to restart the hydraulic cylinder to drive the pressing plate to push the transmission ring sleeve arranged on the outside of the core body and squeeze the top of the core sleeve, so that the transmission mechanism pushes the clamping plate out of the storage groove and embeds it into the positioning slot, so that the transmission ring forms a wrapping limit for the connection end between the core body and the upper mold, reducing the overflow of the core body. At the same time, the four clamping plates are embedded in the four positioning slots to quickly position the core body, thereby facilitating the automatic positioning of the core body, effectively reducing the positioning space required for fixing the core body, and improving the applicability of the device.

[0023] 2. By setting up the reset component and cooperating with the arc-shaped rack, the transmission gear and the transmission rack, when the transmission ring pushes the fan-shaped drive block to rotate around the hinge shaft into the driving groove, the fan-shaped drive block is driven to engage with the transmission gear, so that the transmission gear rotates, and at the same time, the transmission gear is engaged with the transmission rack, and the transmission rack is pushed to drive the clamping plate to embed into the storage groove, so as to realize the fixed clamping of the core body and the core sleeve, thereby effectively improving the practicability of the device.

[0024] 3. By setting the return spring and the follower slide groove and the follower slide rod for use, it is convenient to use the rebound characteristics of the return spring when the hydraulic cylinder is started to drive the pressing plate to drive the transmission ring to break away from the conflict with the core sleeve, so that the return spring can be ejected out of the T-shaped return slide rod along the length direction of the return slide groove, and the T-shaped return slide rod drives the U-shaped ejection frame to push the follower slide rod and the fan-shaped drive block to be ejected out of the driving groove around the hinge shaft, and at the same time, the follower slide rod slides along the inner wall of the follower slide groove, so as to facilitate the push of the fan-shaped drive block to automatically eject the inside of the driving groove around the hinge shaft, thereby effectively improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0026] Figure 2 It is a diagonal cross-sectional view of the mold base in this application.

[0027] Figure 3 It is an exploded view of the internal structure of the mold base in this application.

[0028] Figure 4 It is an exploded view of the internal structure of the drive slot in this application.

[0029] Figure 5 It is a three-dimensional structural exploded diagram of the reset component in this application.

[0030] Description of reference numerals: 1. Press bottom plate; 2. Die base; 3. Die core sleeve; 4. Fixing hole; 5. Fixing bolt; 6. Fixing nut; 7. Die core body; 8. Pressing plate; 9. Upper die; 10. Insulation ring; 11. Transmission ring; 12. Conflict spring; 13. Driving groove; 14. Storage groove; 15. Card plate; 16. Positioning card slot; 17. Fan-shaped driving block; 18. Arc rack; 19. Transmission gear; 20. Transmission rack; 21. Reset slide; 22. T-type reset slide; 23. Reset spring; 24. U Type ejector frame; 25, follow-up slide; 26, follow-up slide; 27, resistance roller; 28, high temperature pad; 29, thermal insulation pad; 30, positioning groove one; 31, rectangular positioning key; 32, positioning groove two; 33, positioning block; 34, positioning groove three; 35, circular positioning key one; 36, positioning groove four; 37, circular positioning key two; 38, hydraulic cylinder; 39, adjusting sleeve; 40, adjusting slide; 41, adjusting screw; 42, operating groove; 43, ceramic ring; 44, thermal insulation sleeve; 45, reading meter. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 —5 further describes this application in detail.

[0032] The embodiment of the present application discloses a die positioning structure for a large isothermal forging hydraulic press.

[0033] Reference Figure 1 - Figure 4 A die positioning structure for a large isothermal forging hydraulic press comprises a press lower plate 1, a die base 2 is placed on the top of the press lower plate 1, a die core sleeve 3 is placed on the top of the die base 2, four fixed through holes 4 are opened at one end of the die base 2 and the die core sleeve 3, the four fixed through holes 4 are evenly arranged in a circle, a fixing bolt 5 is inserted inside the fixing through hole 4, one end of the fixing bolt 5 passes through the fixing through hole 4, and a fixing nut 6 is threadedly connected, a die core body 7 is placed on the top of the die base 2, the die core body 7 is inserted inside the die core sleeve 3, a pressing plate 8 is suspended above the die core body 7, and a pressing plate 8 is suspended above the die core body 7. The bottom of the plate 8 is fixedly connected with an upper mold 9, one end of the upper mold 9 is fixedly connected with an insulation ring 10, one end of the insulation ring 10 is fixedly connected with a transmission ring 11, the top of the pressing plate 8 is fixedly connected with a hydraulic cylinder 38, four driving grooves 13 are evenly opened on the top of the core sleeve 3, the bottom of the driving groove 13 is opened with a receiving groove 14 connected with the inside of the core sleeve 3, a card plate 15 is inserted in the receiving groove 14, one end of the core body 7 is opened with a positioning card groove 16 adapted to the card plate 15, and a transmission mechanism for driving the card plate 15 to be embedded in the positioning card groove 16 is installed in the driving groove 13; Among them, the transmission mechanism includes a fan-shaped driving block 17 rotatably connected to the inside of the driving groove 13, one end of the fan-shaped driving block 17 is fixedly connected to an arc-shaped rack 18, the inside of the driving groove 13 is rotatably connected to a transmission gear 19 meshing with the arc-shaped rack 18, the bottom of the driving 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 an adjusting slide rod 40 adapted to the adjusting sleeve rod 39, the inside of the adjusting sleeve rod 39 is rotatably connected to an adjusting screw 41 threadedly connected to the adjusting slide rod 40, an operating groove 42 connected to the driving groove 13 is opened on the outside of the core sleeve 3, an insulating sleeve 44 is fixedly sleeved on the 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 driving block 17 to deflect around the hinge axis is installed inside the driving groove 13, and one end of the adjusting sleeve rod 39 passes through the furnace wall and extends to the outside of the furnace.

[0034] When in use, firstly, the fixing bolt 5 is pulled through the fixing through-hole 4 at one end of the core sleeve 3 and the die base 2, and the fixing nut 6 is tightened to form a threaded connection with the fixing bolt 5, so as to realize the fixed connection between the die base 2 and the core sleeve 3, and then the core body 7 is pulled and inserted into the inside of the core sleeve 3, and the positioning slot 16 is aligned with the receiving slot 14, and then the processing material is put into the inside of the core body 7, and the hydraulic cylinder 38 is started to drive the pressing plate 8 to drive the upper mold 9 to move downward along the length direction of the heat insulation ring 10, and at the same time, the pressing plate 8 drives the upper mold 9 to push the raw material into the inside of the core body 7, so that the pressing plate 8 pushes the transmission ring 11 to form a conflict with the top of the core sleeve 3; At the same time, the transmission ring 11 pushes the sector drive block 17 to rotate around the hinged axial drive groove 13, and the sector drive block 17 drives the arc rack 18 to mesh with the transmission gear 19, so that the transmission gear 19 rotates and meshes with the transmission rack 20, so that the transmission gear 19 pushes the transmission rack 20 to move along the length direction of the core sleeve 3 toward the inside of the positioning slot 16, so that the transmission rack 20 pushes the card plate 15 to eject the storage slot 14 and embed into the positioning slot 16, so that the four card plates 15 eject the storage slot 14 and embed into the positioning slot 16, and clamp the core body 7 to fix it, so as to facilitate passing The card plate 15 is pushed to transfer inside the receiving groove 14 and the positioning card groove 16 to realize the automatic positioning of the core body 7, effectively reducing the positioning space required for fixing the core body 7, and improving the applicability of the device. The arc-shaped rack 18, the transmission gear 19, and the transmission rack 20 are all made of 316 stainless steel material, which has a good high temperature resistance effect within 1700° and is not easy to deform 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 core sleeve 3, the reading of the reading meter 45 is 30mm, and the reading range is 0-30mm, so as to ensure that the downward pressure of the transmission ring is controllable; When it is necessary to replace the core body 7 of a different size, the adjusting screw 41 can be rotated by using a tool such as a hexagonal wrench, so that the adjusting screw 41 forms a threaded connection with the adjusting slide rod 40, and the clamping plate 15 is pushed out along the length direction of the adjusting slide rod 40, so that the four clamping plates 15 move close to the center with the core body 7 as the center, and then the clamping plate 15 can adjust the ejection length as the diameter of the core body 7 changes, thereby further improving the applicability of the device.

[0035] Reference Figure 2 - Figure 5 The reset assembly includes a ceramic ring 43 fixedly sleeved on the periphery of the core sleeve 3, a reset slide groove 21 adapted to the drive groove 13 is opened on the periphery of the ceramic ring 43, a T-shaped reset slide rod 22 is slidably connected inside the reset slide groove 21, one end of the T-shaped reset slide rod 22 is fixedly connected to a reset spring 23, the reset spring 23 is installed inside the reset slide groove 21, the other end of the T-shaped reset slide rod 22 extends to the inside of the drive groove 13 and is fixedly connected to a U-shaped ejector frame 24, one end of the U-shaped ejector frame 24 is symmetrically opened with a follower slide groove 25, and one end of the fan-shaped drive block 17 is symmetrically fixedly connected with a follower slide rod 26 adapted to the follower slide groove 25.

[0036] When in use, when the hydraulic cylinder 38 is started in the reverse direction to drive the transmission ring 11 to break away from the resistance to the fan-shaped driving block 17, the reset spring 23 is relieved of the force and rebounds to push the T-shaped reset slide bar 22 to move along the length direction of the reset slide groove 21. At the same time, the T-shaped reset slide bar 22 pushes the U-shaped ejection frame 24 to drive the follower slide groove 25 to move closer to the fan-shaped driving block 17 along the length direction of the reset slide groove 21, and the U-shaped ejection frame 24 pushes the follower slide bar 26 to drive the fan-shaped driving block 17 to eject the inside of the driving groove 13 around the hinge axis. At the same time, the U-shaped ejection frame 24 pushes the follower slide bar 26 to slide along the inside of the follower slide groove 25. At the same time, the heat insulation sleeve 44 is provided to form heat insulation protection for the T-shaped reset slide bar 22, thereby improving the high temperature resistance of the T-shaped reset slide bar 22, thereby facilitating the pushing of the fan-shaped driving block 17 to automatically eject the inside of the driving groove 13 around the hinge axis, thereby effectively improving the practicability of the device.

[0037] Reference Figure 3 - Figure 5 The top of the sector-shaped driving block 17 is rotatably connected to a resistance roller 27 , and the resistance roller 27 forms a rolling resistance with the transmission ring 11 .

[0038] During use, when the hydraulic cylinder 38 is started to push the pressing plate 8 to drive the transmission ring 11 to form a conflict with the fan-shaped drive block 17, the transmission ring 11 forms a rolling conflict with the fan-shaped drive block 17 through the conflict roller 27, thereby effectively reducing the wear between the transmission ring 11 and the fan-shaped drive block 17, improving the deflection smoothness of the fan-shaped drive block 17, and extending the service life of the device.

[0039] Reference Figure 1 - Figure 3 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, and 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; Among them, the high temperature pad 28 and the heat insulation pad 29 are symmetrically provided with a positioning groove 30, the top of the mold base 2 and the bottom of the mold core sleeve 3 are provided with a positioning groove 30 adapted to the high temperature pad 28 and the heat insulation pad 29, and a rectangular positioning key 31 is inserted inside the positioning groove 30; Moreover, four positioning grooves 2 32 are provided at the top of the press lower pad 1 and the bottom of the die base 2. The four positioning grooves 2 32 are respectively provided in the middle sections of the four sides of the press lower pad 1 and the die base 2. Positioning blocks 33 are inserted in the positioning grooves 2 32. Positioning grooves 3 34 that are interconnected are provided in the middle sections of the press lower pad 1 and the die base 2. A circular positioning key 1 35 is inserted in the positioning grooves 3 34. Moreover, a positioning groove 4 36 is formed on the top of the core sleeve 3 and the bottom of the core body 7 , and a circular positioning key 2 37 is inserted into the positioning groove 4 36 .

[0040] When in use, firstly, a positioning block 33 is inserted into the second positioning groove 32 formed on the top of the press bottom plate 1, and at the same time, a circular positioning key 1 35 is placed inside the third positioning groove 34, and then the die base 2 is hoisted to the top of the press bottom plate 1, and the positioning groove 2 32 and the positioning block 33, and the circular positioning key 1 35 and the positioning groove 3 34 formed at the bottom are driven by manual pulling of the die base 2 to achieve axial and horizontal clamping between the press bottom plate 1 and the die base 2, reduce the offset between the press bottom plate 1 and the die base 2 due to force, and improve the connection stability between the press bottom plate 1 and the die base 2; 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 the top of the mold base 2. At the same time, the heat insulation pad 29 is pulled to drive the positioning groove 30 opened at the bottom to cover the rectangular positioning key 31 at the top of the mold base 2. Then, a rectangular positioning key 31 is placed inside the positioning groove 30 opened at the top of the heat insulation pad 29, and the high-temperature pad 28 is hoisted and placed on the top of the heat insulation pad 29. At the same time, the high-temperature pad 28 is pulled to drive the positioning groove 30 opened at the bottom to cover the rectangular positioning key 31 at the top of the heat insulation pad 29. Then, the core sleeve 3 is hoisted and placed on the top of the high-temperature pad 28, and the positioning groove 30 opened at the bottom of the core sleeve 3 is driven to cover 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 fixing The fixed through hole 4 is made and the fixing nut 6 is tightened to fix it, so as to realize the fixed connection between the mold base 2 and the thermal insulation pad 29, the high temperature pad 28 and the core sleeve 3, which effectively improves the connection stability between the mold base 2 and the thermal insulation pad 29, the high temperature pad 28 and the core sleeve 3. At the same time, the high temperature pad 28 and the thermal insulation pad 29 are arranged to effectively improve the high temperature resistance and heat insulation performance of the mold base 2. Then, the circular positioning key 2 37 is placed in the positioning groove 4 36 opened at the top of the mold base 2, and the core body 7 is hoisted and inserted into the core sleeve 3, so that the core body 7 drives the positioning groove 4 36 opened at the bottom to wrap the top of the circular positioning key 2 37, thereby realizing the rapid clamping between the core body 7 and the mold base 2, so as to reduce the situation where the core body 7 is offset due to the force, and improve the practicability of the device.

[0041] 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 through-hole 4 at one end of the core sleeve 3 and the die base 2, and the fixing nut 6 is tightened to form a threaded connection with the fixing bolt 5, so as to realize the fixed connection between the die base 2 and the core sleeve 3, and then the core body 7 is pulled and inserted into the inside of the core sleeve 3, and the positioning card slot 16 is aligned with the receiving slot 14. At the same time, when it is necessary to replace the core body 7 of different sizes, the adjusting screw 41 can be rotated by using a tool such as a hexagonal wrench, so that the adjusting screw 41 and the adjusting slide rod 40 form a threaded connection, and the card plate 15 is pushed out along the length direction of the adjusting slide rod 40, so that the four card plates 15 are moved to the center with the core body 7 as the center, so that the card plate 15 can adjust the ejection length as the diameter of the core body 7 changes; Next, the processing material is placed into the mold core body 7, and the hydraulic cylinder 38 is started to drive the pressing plate 8 to drive the upper mold 9 to move 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 a conflict with the top of the core sleeve 3; At the same time, the transmission ring 11 pushes the sector drive block 17 to rotate around the hinged axial drive groove 13, and the sector drive block 17 drives the arc rack 18 to mesh with the transmission gear 19, so that the transmission gear 19 rotates and meshes with the transmission rack 20, and then the transmission gear 19 pushes the transmission rack 20 to move along the length direction of the core sleeve 3 toward the inside of the positioning slot 16, and then the transmission rack 20 pushes the card plate 15 to push out of the storage slot 14 and embed into the positioning slot 16, so that the four card plates 15 push out of the storage slot 14 and embed into the positioning slot 16, and clamp the core body 7; Then, when the hydraulic cylinder 38 is started in the reverse direction to drive the transmission ring 11 to disengage from the sleeve on one end of the core body 7, the transmission ring 11 is disengaged from the conflict with the sector drive block 17. At this time, the reset spring 23 is relieved of the force, and rebounds to push the T-shaped reset slide bar 22 to move along the length direction of the reset slide groove 21. At the same time, the T-shaped reset slide bar 22 pushes the U-shaped ejection frame 24 to drive the follower slide groove 25 to move toward the sector drive block 17 along the length direction of the reset slide groove 21, and the U-shaped ejection frame 24 pushes the follower slide bar 26 to drive the sector drive block 17 to eject the drive groove 13 around the hinge axis. At the same time, the U-shaped ejection frame 24 pushes the follower slide bar 26 to slide along the inside of the follower slide groove 25.

Claims

1. A die positioning structure for a large isothermal forging hydraulic press, comprising a press bottom plate (1), characterized in that: A die base (2) is placed on the top of the lower pad (1) of the press, a core sleeve (3) is placed on the top of the die base (2), four fixing through holes (4) are opened at one end of each of the die base (2) and the core sleeve (3), the four fixing through holes (4) are evenly arranged in a circular shape, a fixing bolt (5) is inserted inside the fixing through hole (4), one end of the fixing bolt (5) passes through the fixing through hole (4) and is threadedly connected to a fixing nut (6), a core body (7) is placed on the top of the die base (2), the core body (7) is inserted inside the core sleeve (3), a pressing plate (8) is suspended above the core body (7), and the bottom of the pressing plate (8) is fixedly connected to the upper die ( 9), one end of the upper mold (9) is fixedly connected to a heat insulating ring (10), one end of the heat insulating 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 core sleeve (3) is evenly provided with four driving grooves (13), the bottom of the driving groove (13) is provided with a receiving groove (14) connected to the inside of the core sleeve (3), a card plate (15) is inserted into the inside of the receiving groove (14), one end of the core body (7) is provided with a positioning card groove (16) adapted to the card plate (15), and the inside of the driving groove (13) is installed with a transmission mechanism for driving the card plate (15) to embed into the positioning card groove (16).

2. The die positioning structure for a large isothermal forging hydraulic press according to claim 1, characterized in that: The transmission mechanism comprises a sector-shaped driving block (17) rotatably connected to the inside of the driving groove (13); one end of the sector-shaped driving block (17) is fixedly connected to an arc-shaped rack (18); the inside of the driving groove (13) is rotatably connected to a transmission gear (19) meshing with the arc-shaped rack (18); the bottom of the driving 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 adjustment sleeve rod (39); one end of the clamping plate (15) is fixedly connected to a transmission gear (20) meshing with the adjustment sleeve rod (39) is adapted to an adjusting slide rod (40), the adjusting sleeve rod (39) is internally rotatably connected to an adjusting screw rod (41) threadedly connected to the adjusting slide rod (40), the outer side of the core sleeve (3) is provided with an operating groove (42) connected to the driving groove (13), the outer periphery of the adjusting sleeve rod (39) is fixedly provided with a heat insulating sleeve (44), and one end of the adjusting sleeve rod (39) is fixedly connected to a reading meter (45), and the interior of the driving groove (13) is installed with a reset component for pushing the fan-shaped driving block (17) to deflect around the hinge axis.

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

4. The die positioning structure for a large isothermal forging hydraulic press according to claim 2, characterized in that: The top of the sector-shaped driving block (17) is rotatably connected to a contact roller (27), and the contact roller (27) forms a rolling contact with the transmission ring (11).

5. The die 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); and a heat-insulating pad (29) is placed on the top of the mold base (2), and the heat-insulating pad (29) is installed between the high-temperature pad (28) and the mold base (2).

6. The die positioning structure for a large isothermal forging hydraulic press according to claim 5, characterized in that: A positioning groove (30) is symmetrically provided at the center of the high-temperature pad (28) and the heat-insulating pad (29); a positioning groove (30) adapted to the high-temperature pad (28) and the heat-insulating pad (29) is provided at the top of the mold base (2) and the bottom of the mold core sleeve (3); a rectangular positioning key (31) is inserted into the interior of the positioning groove (30).

7. The die 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 die base (2) are both provided with four positioning grooves (32), the four positioning grooves (32) are respectively provided in the middle sections of the four sides of the press lower pad (1) and the die base (2), a positioning block (33) is inserted into the inside of the positioning groove (32), and the middle sections of the press lower pad (1) and the die base (2) are provided with positioning grooves (34) that are interconnected, and a circular positioning key (35) is inserted into the inside of the positioning grooves (34).

8. The die positioning structure for a large isothermal forging hydraulic press according to claim 1, characterized in that: A fourth positioning groove (36) is provided on the top of the core sleeve (3) and the bottom of the core body (7), and a second circular positioning key (37) is inserted into the fourth positioning groove (36).

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