A composite hot forging die with replaceable inserts

Abstract

This utility model relates to the field of hot forging die technology and discloses a composite hot forging die with replaceable inserts. It includes a worktable with a replacement mechanism on its top for improved replacement efficiency. A cooling mechanism is located at the bottom of the worktable. The replacement mechanism includes a lower die, the bottom of which is fixedly connected to the top of the worktable. A lower insert is slidably connected to the top of the lower die. Two housings are fixedly connected to the top of the worktable, and each housing has a screw rotatably connected inside. A knob is fixedly connected to the front end of each screw. In this utility model, by releasing the bolts fixing the locking plate, flipping the locking plate, and rotating the knob, the moving clamp is moved away from the fixed clamp, completing the disassembly of the upper and lower inserts. Conversely, installation is performed by moving the locking plate back to its original position. This achieves rapid disassembly and replacement, avoiding the need for additional tools and improving replacement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hot forging die technology, and in particular to a composite hot forging die with replaceable inserts. Background Technology

[0002] Hot forging dies are the core equipment in hot metal forging processes. They are mainly used to press metal billets heated to a plastic state into the die cavity under high temperature conditions, so that they can undergo plastic deformation according to the shape of the cavity, and finally obtain forgings that meet the requirements of dimensional accuracy and mechanical properties. They are used in the fields of automobiles, construction machinery, aerospace, rail transportation and energy equipment. In actual production, the parts of the die that come into direct contact with the high-temperature forgings will wear or fail rapidly due to high temperature, high pressure and friction. Replacing the entire die will increase costs and extend downtime. Therefore, it is necessary to use composite hot forging dies with replaceable inserts, so that the die performance, service life and use cost can be balanced by replacing the inserts individually.

[0003] In the hot forging process of a composite hot forging die with replaceable inserts, the high-temperature metal billet flows rapidly within the die cavity under pressure. At this time, the metal material and the surface of the insert will generate strong friction and impact, affecting the service life of the die and the quality of the forging. The current solution is to select hot work die steel with strong wear resistance, improve the hardness of the base material by adjusting the composition or heat treatment process, enhance the wear resistance, and set a transition arc at the corner where the metal flows in to reduce eddy current wear. However, traditional insert replacement requires the use of special tools to disassemble the fixed structure. Replacement may be interrupted due to incomplete tools or mismatched models, affecting replacement efficiency. At the same time, positioning deviation will affect the accuracy of subsequent forgings, resulting in repeated disassembly, reassembly and calibration, affecting the continuity and capacity of the hot forging production line. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a composite hot forging die with replaceable inserts, aiming to improve the problem that the replacement of traditional inserts requires special tools, which reduces replacement efficiency, disrupts the continuity of the production line, and restricts production capacity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a composite hot forging die with replaceable inserts, including a worktable, a replacement mechanism being provided on the top of the worktable to improve replacement efficiency, and a cooling mechanism being provided on the bottom of the worktable;

[0006] The replacement mechanism includes a lower mold, the bottom of which is fixedly connected to the top of the workbench. A lower insert is slidably connected to the top of the lower mold. Two housings are fixedly connected to the top of the workbench. Screws are rotatably connected inside each of the two housings. Knobs are fixedly connected to the front ends of the two screws. Movable clamping plates are threadedly connected to the middle of each of the two screws. Fixed clamping plates are fixedly connected to the rear ends of adjacent sides of the two housings. An upper insert is slidably fixedly connected to the top of the lower insert. An upper mold is slidably connected to the top of the upper insert. Two locking pins are fixedly connected to the top of the upper insert. Two locking plates are rotatably connected to the top of the upper mold. Locking grooves are opened at adjacent ends of the two locking pins. The opposite sides of the two locking plates engage with the corresponding locking grooves. Bolts are threadedly connected to the tops of the two locking plates.

[0007] As a further description of the above technical solution:

[0008] The cooling mechanism includes a water pump, the top of which is fixedly connected to the bottom of the workbench. An interface is fixedly connected to the rear side of the water pump, and a water outlet pipe is connected to the top of the interface. A filter plate is fixedly connected inside the water outlet pipe, and an annular pipe is connected to the top of the water outlet pipe. A heat exchanger is connected to the top of the annular pipe, and a water inlet pipe is connected to the right side of the heat exchanger. The front end of the water inlet pipe is connected to the rear side of the interface.

[0009] As a further description of the above technical solution:

[0010] A control switch is fixedly connected to the right side of the workbench, and the control switch is electrically connected to the water pump and the heat exchanger respectively.

[0011] As a further description of the above technical solution:

[0012] The top of the lower insert is fixedly connected to a plurality of positioning posts, and the bottom of the upper insert is provided with a sliding groove, with the tops of the plurality of positioning posts respectively slidably connected to the interior of the corresponding sliding groove.

[0013] As a further description of the above technical solution:

[0014] The replacement mechanism also includes multiple protective sleeves, the inner walls of which are respectively fixedly connected to the tops of the two movable clamps and the two fixed clamps.

[0015] As a further description of the above technical solution:

[0016] The bottom of the workbench is fixedly connected to two support frames, and rubber sleeves are fixedly connected to the front and rear sides of the two support frames respectively.

[0017] As a further description of the above technical solution:

[0018] A heat insulation pad is fixedly connected to the outer wall of the water outlet pipe, and a sealing ring is fixedly connected to the outer wall of the heat insulation pad.

[0019] As a further description of the above technical solution:

[0020] The replacement mechanism also includes two gaskets, the inner walls of which are respectively fixedly connected to the middle of the bolt.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by releasing the bolts that fix the locking plate, flipping the locking plate, taking out the upper insert, and rotating the knob to drive the screw to move the moving clamp away from the fixed clamp, the lower insert is released from the fixation, thus completing the disassembly of the upper and lower inserts. Conversely, the upper and lower inserts are installed, thereby realizing the replacement of the upper and lower inserts. This avoids the need for additional tools during replacement, avoids the problems of poor compatibility and inconvenient replacement, and improves the replacement efficiency.

[0023] 2. In this utility model, driven by a water pump, the cooling medium first flows through the filter plate inside the outlet pipe to filter impurities, preventing metal debris from clogging the annular pipe and affecting the heat exchange efficiency. Then it flows into the annular pipe, whose surrounding structure can increase the contact area with the high-temperature mold, absorb the heat generated by forging, and then release the heat through the heat exchanger to complete the cooling. The medium then flows back to the inlet pipe and back to the water pump, forming a continuous cycle, stabilizing the mold temperature within a reasonable range, which not only ensures the forming accuracy of the forging but also extends the service life of the mold. Attached Figure Description

[0024] Figure 1 This is a perspective view of a composite hot forging die with replaceable inserts proposed in this utility model.

[0025] Figure 2 This is a front view of a composite hot forging die with replaceable inserts proposed in this utility model;

[0026] Figure 3 This is a side view of a composite hot forging die with replaceable inserts proposed in this utility model.

[0027] Figure 4 This is an exploded view of a replacement mechanism for a composite hot forging die with replaceable inserts proposed in this utility model.

[0028] Figure 5 This is an exploded view of the cooling mechanism of a composite hot forging die with replaceable inserts proposed in this utility model.

[0029] Legend:

[0030] 1. Workbench; 2. Replacement mechanism; 201. Lower mold; 202. Lower insert; 203. Housing; 204. Screw; 205. Knob; 206. Moving clamp; 207. Fixed clamp; 208. Upper insert; 209. Upper mold; 210. Locking post; 211. Locking plate; 212. Locking groove; 213. Bolt; 214. Washer; 215. Protective sleeve; 216. Positioning post; 217. Sliding groove; 3. Cooling mechanism; 301. Water pump; 302. Interface; 303. Water outlet pipe; 304. Filter plate; 305. Annular pipe; 306. Heat exchanger; 307. Water inlet pipe; 308. Thermal insulation pad; 309. Sealing ring; 4. Control switch; 5. Support frame; 6. Rubber sleeve. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 3 and Figure 4 The present invention provides an embodiment of a composite hot forging die with replaceable inserts, including a worktable 1, a replacement mechanism 2 on the top of the worktable 1 for improving replacement efficiency, and a cooling mechanism 3 on the bottom of the worktable 1 for cooling the die and inserts.

[0033] The replacement mechanism 2 includes a lower mold 201, the bottom of which is fixedly connected to the top of the workbench 1. A lower insert 202 is slidably connected to the top of the lower mold 201. The lower mold 201 is used to position and install the lower insert 202. Two housings 203 are fixedly connected to the top of the workbench 1. Screws 204 are rotatably connected inside each of the two housings 203. The screws 204 are rotated under the drive of a knob 205 to clamp or release the lower insert 202. A knob 205 is fixedly connected to the front end of each of the two screws 204. A movable clamping plate 206 is threadedly connected to the middle of each of the two screws 204. A fixed clamping plate 207 is fixedly connected to the rear end of each adjacent side of the two housings 203. The top of the lower insert 202... An upper insert 208 is slidably fixedly connected. The upper insert 208 is used to cooperate with the lower insert 202 to form a complete cavity for the forging. An upper mold 209 is slidably connected to the top of the upper insert 208. Two locking pins 210 are fixedly connected to the top of the upper insert 208. Two locking plates 211 are rotatably connected to the top of the upper mold 209. The locking plates 211 are used to engage with the locking grooves 212 to fix the upper insert 208 and the upper mold 209. Each of the two locking pins 210 has a locking groove 212 at one of its adjacent ends. The opposite sides of the two locking plates 211 engage with the corresponding locking grooves 212. Bolts 213 are threadedly connected to the top of each of the two locking plates 211. The bolts 213 are used to tighten and fix the locking plates 211.

[0034] Specifically, the lower mold 201 serves as the basic supporting component for the lower insert 202, with its bottom fixed to the top of the workbench 1. Two housings 203 are symmetrically arranged on the top of the workbench 1. The screws 204 inside the housings 203 can rotate synchronously when the operator turns the knob 205. Through threaded transmission, the movable clamping plate 206 connected in the middle moves axially along the housing 203. When the movable clamping plate 206 approaches the fixed clamping plate 207 on the adjacent side of the housing 203, the two can form a clamping force from the front and rear ends of the lower insert 202, firmly locking the lower insert 202 and preventing it from shifting due to forging pressure. Conversely, the installation is completed. Corresponding to the installation structure of the lower insert 202, the upper insert 208 connects to the top of the lower insert 202 through its bottom. After the two are closed, a complete forging is formed. The upper insert 208 is slidably fitted with the bottom of the upper mold 209. Simultaneously, it is locked to the upper mold 209 by two locking pins 210 fixed at the top. Rotating the locking plate 211 at the top of the upper mold 209 causes it to engage with the locking groove 212 of the locking pin 210, thus initially fixing the relative position of the upper insert 208 and the upper mold 209. Finally, tightening the bolt 213 at the top of the locking plate 211 enhances the tightness of the fit between the locking plate 211 and the locking groove 212 through the axial pressure of the bolt 213, preventing the upper insert 208 from loosening or misaligning during die forging. The entire structure ensures convenient insert replacement while meeting the precision requirements of the mold during hot forging.

[0035] Reference Figure 1 , Figure 2 and Figure 5 The cooling mechanism 3 includes a water pump 301. The top of the water pump 301 is fixedly connected to the bottom of the workbench 1. The water pump 301 is used to provide power to drive the cooling medium to circulate within the cooling mechanism 3. An interface 302 is fixedly connected to the rear side of the water pump 301. A water outlet pipe 303 is connected to the top of the interface 302. A filter plate 304 is fixedly connected inside the water outlet pipe 303. The filter plate 304 is used to filter impurities in the cooling medium. An annular pipe 305 is connected to the top of the water outlet pipe 303. The annular pipe 305 is used to surround the mold insert to increase the contact area between the cooling medium and the high-temperature component and improve the heat absorption efficiency. A heat exchanger 306 is connected to the top of the annular pipe 305. A water inlet pipe 307 is connected to the right side of the heat exchanger 306. The front end of the water inlet pipe 307 is connected to the rear side of the interface 302. The water inlet pipe 307 is used to transport the cooling medium cooled by the heat exchanger 306 back to the interface 302 to complete the closed loop circulation.

[0036] Specifically, the water pump 301 is fixed to the bottom of the workbench 1 from the top, providing stable power output to drive the cooling medium to flow continuously throughout the mechanism, providing the core driving force for circulation. Its rear interface 302 acts as a transit point, connecting the outlet pipe 303 and the inlet pipe 307 respectively, ensuring orderly medium flow. During the medium transport process, the filter plate 304 inside the outlet pipe 303 intercepts impurities in the medium, preventing them from clogging subsequent pipes or the annular pipe 305 and affecting heat exchange efficiency. The annular pipe 305 is connected to the top of the outlet pipe 303. Inside the lower die 201, near the bottom of the lower insert 202, the medium is arranged in a ring to maximize the contact area with the high-temperature insert, allowing the medium to quickly absorb the heat generated by forging and improve the heat absorption efficiency. After absorbing the heat, the high-temperature medium flows into the heat exchanger 306 at the top of the ring pipe 305, where it releases heat and lowers the temperature through the heat exchange principle. The cooled medium then flows back to the interface 302 through the water inlet pipe 307 on the right side of the heat exchanger 306, and finally re-enters the water pump 301, forming a complete closed loop to continuously cool the die and maintain the stable temperature environment required for hot forging.

[0037] Reference Figure 2 and Figure 4 The top of the lower insert 202 is fixedly connected to multiple positioning posts 216, and the bottom of the upper insert 208 is provided with a sliding groove 217. The tops of the multiple positioning posts 216 are slidably connected to the interior of the corresponding sliding groove 217. The replacement mechanism 2 also includes multiple protective sleeves 215, the inner walls of which are fixedly connected to the tops of the two movable clamping plates 206 and the two fixed clamping plates 207. The replacement mechanism 2 also includes two washers 214, the inner walls of which are fixedly connected to the middle of the bolt 213.

[0038] Specifically, the top of the positioning post 216 is embedded in the sliding groove 217 and can slide along the groove. It is used to align the center position when the insert is closed, ensuring that the two cavities are connected to form a complete forging shape. It can also limit the lateral displacement of the insert through sliding fit, avoiding cavity misalignment caused by forging pressure. At the same time, it provides vertical support for the upper insert 208, enhancing the structural stability when the mold is closed. The protective sleeve 215 is used to prevent the clamping plate from directly rigidly contacting the lower insert 202 when the clamping plate clamps it, reducing wear on the surface of the insert during clamping. The two gaskets 214 are respectively sleeved in the middle of the bolt 213 to increase the contact area between the bolt 213 and the locking plate 211, disperse the pressure when the bolt 213 is tightened, prevent the head of the bolt 213 from damaging the surface of the locking plate 211, prevent the bolt 213 from loosening due to vibration, and ensure the long-term stability of the locking structure.

[0039] Reference Figure 1 and Figure 5 A control switch 4 is fixedly connected to the right side of the workbench 1. The control switch 4 is electrically connected to the water pump 301 and the heat exchanger 306 respectively. Two support frames 5 are fixedly connected to the bottom of the workbench 1. Rubber sleeves 6 are fixedly connected to the front and rear sides of the two support frames 5 respectively. A heat insulation pad 308 is fixedly connected to the outer wall of the water outlet pipe 303. A sealing ring 309 is fixedly connected to the outer wall of the heat insulation pad 308.

[0040] Specifically, the control switch 4, which is electrically connected to the water pump 301 and the heat exchanger 306 respectively, enables the equipment to be turned on and off. The support frame 5 is used to stably support the entire mold system. The rubber sleeve 6 increases the friction between the support frame 5 and the ground to prevent the support frame 5 from shifting during equipment operation. The heat insulation pad 308 can prevent the low temperature in the water outlet pipe 303 from being directly transmitted to the outer wall, and prevent the sealing ring 309 from being in an extreme temperature environment for a long time. The sealing ring 309 is used to fill gaps, prevent the cooling medium from leaking, and enhance the sealing of the connection parts.

[0041] Working principle: When replacing the upper insert 208 and the lower insert 202, first loosen the bolt 213 on the top of the locking plate 211 so that the bolt 213 no longer applies pressure to the locking plate 211. Then rotate the locking plate 211 to completely disengage it from the locking groove 212 of the locking post 210, thus completely releasing the locking relationship between the upper insert 208 and the upper mold 209. Next, drive the upper mold 209 upwards so that its bottom disengages from the sliding fit with the top of the upper insert 208. At this point, the upper insert 208 can be removed, completing the disassembly of the upper insert 208. Then proceed with the lower insert 202. For replacement, the operator rotates the knob 205 at the front end of the housing 203, causing the screw 204 inside the housing 203 to rotate synchronously. Under the action of the threaded transmission, the moving clamp 206 will move along the housing 203 away from the fixed clamp 207, gradually releasing the clamping force on the lower insert 202. After the clamp is completely released, the lower insert 202 is pulled out smoothly along the sliding guide rail at the top of the lower mold 201 to complete the disassembly of the insert. Conversely, the insert is installed. This avoids the need for additional tools during replacement, avoids problems of poor compatibility and inconvenient replacement, and improves the efficiency and convenience of replacement.

[0042] Furthermore, during mold cooling, the water pump 301 drives a stable and continuous water pressure, delivering the cooling medium from the pump body. The medium is then introduced into the outlet pipe 303 via the rear interface 302. As the medium flows through the outlet pipe 303, the filter plate 304 inside intercepts any metal debris, scale, or other impurities that may be mixed in, preventing these impurities from entering subsequent pipes and clogging the annular pipe 305. This ensures smooth medium flow. When clean cooling medium flows into the annular pipe 305, the surrounding structure of the annular pipe 305 increases the contact area with the high-temperature mold, absorbing the heat accumulated during forging. The medium's temperature rises due to the flow rate of the medium. The high-temperature medium carrying heat then flows through the pipe into the heat exchanger 306 connected to the annular pipe 305. Inside the heat exchanger 306, it rapidly releases its heat through heat exchange with the low-temperature water source or cold air, thus cooling down. The cooled low-temperature medium then flows back to the interface 302 through the water inlet pipe 307 on the right side of the heat exchanger 306, and finally re-enters the water pump 301, forming a complete closed loop. This continuously removes heat from the core area of ​​the mold, controlling the mold temperature to remain within the reasonable range required for hot forging, and preventing overheating of the mold from affecting the forming accuracy of the forging or shortening the mold's service life.

[0043] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite hot forging die with replaceable inserts, comprising a worktable (1), characterized in that: The top of the workbench (1) is provided with a replacement mechanism (2), which is used to improve replacement efficiency. The bottom of the workbench (1) is provided with a cooling mechanism (3). The replacement mechanism (2) includes a lower mold (201), the bottom of which is fixedly connected to the top of the workbench (1). A lower insert (202) is slidably connected to the top of the lower mold (201). Two housings (203) are fixedly connected to the top of the workbench (1). Screws (204) are rotatably connected inside each of the two housings (203). A knob (205) is fixedly connected to the front end of each of the two screws (204). A movable clamping plate (206) is threadedly connected to the middle of each of the two screws (204). A fixed clamping plate is fixedly connected to the rear end of each adjacent side of the two housings (203). (207) The top of the lower insert (202) is slidably and fixedly connected to the upper insert (208), the top of the upper insert (208) is slidably connected to the upper mold (209), the top of the upper insert (208) is fixedly connected to two locking pins (210), the top of the upper mold (209) is rotatably connected to two locking plates (211), each of the two locking pins (210) has a locking groove (212) at one of its adjacent ends, the two locking plates (211) are respectively engaged with the corresponding locking groove (212) on the opposite side, and the top of each of the two locking plates (211) is threaded with a bolt (213).

2. A composite hot forging die with replaceable inserts according to claim 1, characterized in that: The cooling mechanism (3) includes a water pump (301), the top of which is fixedly connected to the bottom of the workbench (1). An interface (302) is fixedly connected to the rear side of the water pump (301). A water outlet pipe (303) is connected to the top of the interface (302). A filter plate (304) is fixedly connected inside the water outlet pipe (303). An annular pipe (305) is connected to the top of the water outlet pipe (303). A heat exchanger (306) is connected to the top of the annular pipe (305). A water inlet pipe (307) is connected to the right side of the heat exchanger (306). The front end of the water inlet pipe (307) is connected to the rear side of the interface (302).

3. A composite hot forging die with replaceable inserts according to claim 2, characterized in that: A control switch (4) is fixedly connected to the right side of the workbench (1), and the control switch (4) is electrically connected to the water pump (301) and the heat exchanger (306) respectively.

4. A composite hot forging die with replaceable inserts according to claim 1, characterized in that: The top of the lower insert (202) is fixedly connected with a plurality of positioning posts (216), and the bottom of the upper insert (208) is provided with a sliding groove (217), and the tops of the plurality of positioning posts (216) are respectively slidably connected to the interior of the corresponding sliding groove (217).

5. A composite hot forging die with replaceable inserts according to claim 1, characterized in that: The replacement mechanism (2) also includes a plurality of protective sleeves (215), the inner walls of which are respectively fixedly connected to the tops of the two movable clamps (206) and the two fixed clamps (207).

6. A composite hot forging die with replaceable inserts according to claim 1, characterized in that: The bottom of the workbench (1) is fixedly connected to two support frames (5), and rubber sleeves (6) are fixedly connected to the front and rear sides of the two support frames (5).

7. A composite hot forging die with replaceable inserts according to claim 2, characterized in that: A heat insulation pad (308) is fixedly connected to the outer wall of the water outlet pipe (303), and a sealing ring (309) is fixedly connected to the outer wall of the heat insulation pad (308).

8. A composite hot forging die with replaceable inserts according to claim 1, characterized in that: The replacement mechanism (2) also includes two gaskets (214), the inner walls of which are respectively fixedly connected to the middle of the bolt (213).

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