Hot punching die

Abstract

The utility model provides a hot punching die, and belongs to the technical field of machinery. The problem that the production efficiency is low due to the fact that manual discharging is needed is solved. A mounting groove is formed in the mounting seat in a penetrating mode in the vertical direction, the female die and the die core are arranged in the mounting groove, the female die comprises two oppositely-arranged half dies, part of the die core is located in the female die in the die assembly state, a fixed die seat is fixedly connected into the mounting groove, a movable die seat is slidably connected into the mounting groove in the front-back direction, and the fixed die seat is located in front of the movable die seat. The two half molds are connected to the fixed mold base and the movable mold base correspondingly, a mold locking oil cylinder is fixed to the side portion of the installation base and can drive the movable mold base to be close to or away from the fixed mold base, the mold core can move backwards relative to the fixed mold base during mold splitting, and the backward moving distance of the movable mold base during mold splitting is larger than the backward moving distance of the mold core. And an unloading structure capable of unloading from the mold core after the mold is split is arranged on the mounting seat. The device has the advantages of automatic blanking, high production efficiency and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a red punching die. Background Technique

[0002] For the valve body of a copper valve, if it is manufactured by die casting, there are likely to be pores. Therefore, forging is usually used. The forging of the valve body of a copper valve means that the heated round bar stock is placed into a forging die, and then the round bar stock is extruded into the cavity of the forging die by a punching press to form a shape matching the cavity. Currently, the commonly used forging dies are basically split dies. For example, the slider type automatic separation precision forging die disclosed in the patent application No. 201510422307.5 includes an outer die sleeve, a core die sleeve, and a forming core die. There are two tapered T-shaped grooves arranged in an inverted V shape in the outer die sleeve. The core die sleeve is separated into two split modules along the center line. T-shaped guide rails are respectively arranged outside the two split modules. The T-shaped guide rails cooperate with the T-shaped grooves to enable the two split modules to slide up and down. The forming core die includes two half dies, and the two half dies are respectively fixedly connected to the opposite sides of the two split modules. When the two split modules slide upward, the two half dies will separate from each other to form a split die. When the two split modules slide downward, the two half dies will close together to form a closed die. The forming core die has a cavity for forming the valve body (of course, the cavity is also formed after the two half dies are closed).

[0003] During use, the staff uses a pair of tongs to place the heated round bar stock into the forming core die, and then the upper punch of the punching press presses down to extrude the round bar stock into the cavity for forming. After stamping is completed, the upper punch retracts, and then the two split modules move upward to separate the two half dies to form a split die. Although the two half dies will separate, in practice, the formed valve body is likely to get stuck on the half die, and usually, the staff uses a pair of tongs to manually take out the formed valve body from the die. Therefore, the production efficiency is very low. Especially when there are holes on the formed valve body, a cylindrical core die is also used. In this case, the formed valve body will directly be inserted on the core die, which makes it even more difficult for the demoulding and blanking of the valve body, and more manual blanking by the staff is required. Summary of the Utility Model

[0004] The purpose of the present utility model is to address the above problems existing in the prior art and propose a red punching die, which solves the problem of low production efficiency caused by manual blanking.

[0005] The purpose of the present utility model can be achieved by the following technical solutions:

[0006] A red punching die includes a mounting base with a mounting groove penetrating vertically, and a female die and a die core both disposed in the mounting groove. The female die includes two relatively arranged half dies. In the closed die state, part of the die core is located inside the female die. It is characterized in that a fixed die base is fixedly connected in the mounting groove and a movable die base is slidably connected in the front-rear direction. The fixed die base is located in front of the movable die base. The two half dies are respectively connected to the fixed die base and the movable die base. A clamping die oil cylinder is fixed on the side of the mounting base. The clamping die oil cylinder can drive the movable die base to approach or move away from the fixed die base. When the die is separated, the die core can move backward relative to the fixed die base, and the distance that the movable die base moves backward during die separation is greater than the distance that the die core moves backward. A discharging structure is provided on the mounting base to unload the workpiece from the die core after die separation.

[0007] During use, the clamping die oil cylinder drives the movable die base to approach the fixed die base, causing the two half dies to abut and close to form a female die. Then, the round bar heated in a red punching furnace is placed into the female die from top to bottom. Finally, the upper punch presses down to extrude the round bar into the cavity and form a shape matching the cavity. The presence of the die core makes the formed valve body have a hole by itself. After forming, the valve body is inserted on the die core. When separating the die, the clamping die oil cylinder drives the movable die base to move backward, and the die core also moves backward relative to the fixed die base to automatically remove the valve body from the half die at the fixed die base. Since the distance that the movable die base moves backward during die separation is greater than the distance that the die core moves backward, in the final die separation state, the movable die base is also separated from the die core, and the valve body is not stuck in the half die of the movable die base. The die core and the valve body are located in the area between the two half dies. Finally, the discharging structure operates to unload the valve body from the die core, so that the valve body can directly fall out of the lower end slot of the mounting groove outside the mounting base, realizing blanking.

[0008] In this red punching die, by respectively fixedly connecting the two half dies to the fixed die base and the movable die base, and driving the movable die base to move backward by the clamping die oil cylinder, when separating the die, the die core can move backward relative to the fixed die base to automatically remove the valve body from the half die at the fixed die base. The fact that the distance that the movable die base moves backward during die separation is greater than the distance that the die core moves backward ensures that the valve body is not stuck on the half die of the movable die base. Combined with the setting of the discharging structure, automatic demoulding and blanking of the formed valve body are realized, improving production efficiency. In addition, the clamping die oil cylinder can provide a stable clamping force for the female die (in practice, only by controlling the oil supply pressure to ensure that the clamping force formed by the clamping die oil cylinder is greater than the impact force of the upper punch). In this way, when the upper punch presses down to form the valve body, it can ensure that the two half dies are stably closed together, so that there will be no gap between the two half dies due to the impact force of the upper punch, thus greatly reducing the burrs and flash on the outside of the formed valve body.

[0009] In the above red punching die, a material sliding seat is provided at the lower end slot of the mounting groove. The top of the material sliding seat has a material sliding surface inclined downward. The material sliding seat is located below the area between the two half dies after die separation.

[0010] The material chute seat is located below the area between the two half - molds after mold splitting. In this way, after the formed valve body is unloaded from the mold core by the unloading structure, it will fall on the material chute seat and automatically slide out of the installation groove by means of the slope of the material chute surface. In practice, a conveyor belt can be correspondingly arranged below the installation seat, so that the valve body falling out of the installation groove can fall on the conveyor belt and be directly conveyed by the conveyor belt.

[0011] In the above - mentioned hot - punching die, the mold core includes two side mold cores which are arranged oppositely in the left - right direction. The unloading structure includes two ejector rods both arranged in the left - right direction, two ejector driving components corresponding to the two ejector rods one by one, and two core - pulling driving parts corresponding to the two side mold cores one by one. The two ejector rods are respectively inserted into the two side mold cores, the ejector driving component can drive the corresponding ejector rod to move, and the core - pulling driving part can drive the corresponding side mold core to move away from the other side mold core.

[0012] The two side mold cores are used to make the left and right sides of the valve body formed in the female mold have holes. Before forming, the two ejector driving components respectively drive the two ejector rods to move to a state where one end of each ejector rod is flush with one end of the corresponding side mold core located in the female mold. After the valve body is formed, the two side mold cores are inserted into the valve body, and the valve body is clamped between the two ejector rods. When mold splitting, the moving die base and the two side mold cores both move backward, and the moving die base moves further backward relative to the side mold cores. Therefore, in the final mold - splitting state, the two side mold cores and the valve body are located in the area between the two half - molds. Then, while maintaining the two ejector driving components to keep the two ejector rods stationary, the two core - pulling driving parts simultaneously drive the two side mold cores to move away from each other. Since the valve body is also pushed by the two ejector rods in the left - right direction, the two side mold cores can be pulled out of the valve body. Finally, the two ejector driving components drive the two ejector rods to move away from each other, thus loosening the formed valve body. The loosened valve body will fall on the material chute surface of the material chute seat and automatically slide out of the installation seat by means of the slope of the material chute surface.

[0013] In the above - mentioned hot - punching die, guiding grooves are respectively penetrated through the left and right sides of the installation seat. The two guiding grooves are both strip - shaped and arranged in the front - back direction, and both are communicated with the installation groove. Sliding blocks are arranged in the two guiding grooves, and the two side mold cores are respectively connected to the two sliding blocks. The length of the sliding block in the front - back direction is less than the length of the guiding groove. Two reset springs are correspondingly arranged in the installation seat, and the rear ends of the reset springs abut against the front sides of the sliding blocks.

[0014] The length of the sliding block in the front - back direction is less than the length of the guiding groove. Such a length difference in the front - back direction enables the side mold core to slide relative to the fixed die base in the front - back direction. Thus, when mold splitting, the side mold core can move along the guiding groove under the action of the reset spring and automatically separate from the fixed die base.

[0015] In the above-mentioned red punching die, the pushing drive assembly includes a working spring and a pushing cylinder / pushing oil cylinder. The push rod is partially located within the sliding block. The core-pulling drive member is a core-pulling oil cylinder / core-pulling cylinder, and it is linked with the corresponding sliding block in the front-back direction. A connecting head is fixedly connected to the piston end of the core-pulling oil cylinder / core-pulling cylinder. One end of the connecting head is threadedly connected within the corresponding sliding block. The working spring is sleeved outside the push rod located within the sliding block, and the push rod abuts against the end of the connecting head located within the sliding block under the elastic force of the working spring. A working rod is inserted through the connecting head. One end of the working rod extends outside the piston of the core-pulling oil cylinder / core-pulling cylinder and is fixedly connected to the piston end of the pushing cylinder / pushing oil cylinder. When the working rod moves towards the installation groove, it can abut against the push rod.

[0016] During the process of forming the valve body, the pistons of the two pushing cylinders are pushed out, causing the two working rods to push the corresponding push rods to a state where one end is flush with the end of the side die core located within the female die. When demolding, the clamping oil cylinder drives the moving die base to move backward. At the same time, the two sliding blocks move backward under the action of the return springs, causing the two side die cores together with the valve body to separate from the half die on the fixed die base. When the sliding blocks move to abut against the rear side wall of the guiding groove, the moving die base continues to move backward. In this way, in the final demolding state, the two side die cores and the valve body are located within the area between the two half dies. After that, while maintaining the pistons of the pushing cylinders in the pushed-out state, the pistons of the two core-pulling oil cylinders act simultaneously to drive the two sliding blocks to move away from each other. Since the valve body is also being pushed by the two push rods in the left-right direction, the two side die cores can be withdrawn from the valve body. Finally, by controlling the pistons of the two pushing cylinders to retract, the two working rods no longer abut against the two push rods, and the two push rods will move away from each other under the action of their respective working springs, thereby loosening the formed valve body to achieve unloading.

[0017] In the above-mentioned red punching die, sliding seats are respectively slidably connected to the left and right sides of the mounting seat. The two core-pulling oil cylinders / core-pulling cylinders are respectively fixedly connected to the two sliding seats. Connecting seats are respectively fixedly connected to the cylinder bodies of the two core-pulling oil cylinders / core-pulling cylinders. The cylinder bodies of the two pushing cylinders / pushing oil cylinders are respectively fixedly connected to the two connecting seats.

[0018] By slidably connecting the sliding seats outside the mounting seat and fixedly connecting the core-pulling oil cylinders / core-pulling cylinders to the sliding seats, the core-pulling oil cylinders / core-pulling cylinders can be linked with the sliding blocks in the front-back direction. The setting of the connecting seats provides a position for the installation and fixation of the pushing cylinders / pushing oil cylinders.

[0019] In the above-mentioned red punching die, the die core includes a lower die core. A material chute seat is sleeved outside the lower die core. The unloading structure includes the top of the material chute seat and a material-removing drive member that can drive the material chute seat to move upward.

[0020] The lower die core is used to form a hole at the lower end of the valve body formed in the female die. After forming, the upper end of the lower die core is inserted into the valve body. During die splitting, the moving die base and the lower die core both move backward (the material chute seat is sleeved outside the lower die core, so it will also move with the lower die core), and the moving die base moves further backward relative to the lower die core. Therefore, in the final die splitting state, the upper end of the lower die core and the valve body are located in the area between the two half dies. Then, the material chute seat is driven by the ejection driving member to move upward, so that the top of the material chute seat will push the valve body inserted at the upper end of the lower die core upward until the entire valve body is pushed out from the upper end of the lower die core. The ejected valve body will fall on the material chute surface of the material chute seat and automatically slide out of the mounting seat by means of the slope of the material chute surface.

[0021] In the above-mentioned hot stamping die, a movable block is provided in the lower slot opening of the mounting groove, the lower die core is connected to the movable block, the rear end of the movable block is slidably arranged in the lower end of the moving die base, a matching structure is provided between the movable block and the moving die base, and when the die is closed, the moving die base can first move forward until the half die to which it is fixed abuts against the upper end of the lower die core, and then drive the movable block to move forward together through the matching structure. When the die is split, the moving die base can first move backward until the half die to which it is fixed is separated from the upper end of the lower die core, and then drive the movable block to move backward together through the matching structure.

[0022] Through the above settings, during die splitting, the moving die base can provide a driving force for the backward movement of the movable block through the matching structure after being separated from the lower die core, so as to realize the backward movement of the lower die core. Similarly, during die closing, the moving die base can provide a driving force for the forward movement of the movable block through the matching structure after abutting against the lower die core, so as to realize the forward movement of the lower die core.

[0023] In the above-mentioned hot stamping die, the matching structure includes a matching groove provided on the side of the moving die base and a matching block fixed to the side of the rear end of the movable block. The matching groove is arranged in a strip shape along the front-rear direction. The matching block is partially located in the matching groove, and the length of the matching block along the front-rear direction is less than that of the matching groove. In the die closing state, the matching block abuts against the rear side wall of the matching groove. Or, the matching structure includes a linkage block fixed in the lower end of the moving die base and a linkage groove provided on the side of the rear end of the movable block. The linkage groove is arranged in a strip shape along the front-rear direction. The linkage block is partially located in the linkage groove, and the length of the linkage block along the front-rear direction is less than that of the linkage groove. In the die closing state, the linkage block abuts against the front side wall of the linkage groove.

[0024] In the mold - closing state, the mating block abuts against the rear - side groove wall of the mating groove. Since the length of the mating block in the front - to - rear direction is less than that of the mating groove, when the moving mold base separates the molds, it can first move backward a small distance relative to the movable block, causing the half - mold on the moving mold base to separate from the lower mold core. When the moving mold base moves backward until the groove wall of the mating groove abuts against the mating block, the moving mold base can drive the movable block to move together, separating the lower mold core from the fixed mold base, ensuring that in the final mold - separating state, the lower mold core is separated from both the moving mold base and the fixed mold base simultaneously.

[0025] Alternatively, in the mold - closing state, the linkage block abuts against the front - side groove wall of the linkage groove. Since the length of the mating block in the front - to - rear direction is less than that of the linkage groove, when the moving mold base separates the molds, it can first move backward a small distance relative to the movable seat, causing the half - mold on the moving mold base to separate from the lower mold core. When the moving mold base moves backward until the linkage block abuts against the rear - side groove wall of the linkage groove, the moving mold base can drive the movable block to move together, separating the lower mold core from the fixed mold base, ensuring that in the final mold - separating state, the lower mold core is separated from both the moving mold base and the fixed mold base simultaneously.

[0026] In the above - mentioned hot - stamping die, a number of first connecting columns are fixedly connected to the bottom of the movable block. The blank - discharging driving part is a blank - discharging oil cylinder / a blank - discharging air cylinder. The cylinder body of the blank - discharging oil cylinder / blank - discharging air cylinder is fixedly connected to the lower end parts of the first connecting columns. The piston end of the blank - discharging oil cylinder / blank - discharging air cylinder is fixedly connected to a lifting plate. A connecting plate is abutted and arranged on the movable block. The material - sliding seat is fixedly connected to the connecting plate. A number of second connecting columns are fixedly connected between the lifting plate and the material - sliding seat.

[0027] Specifically, during blank - discharging, the piston of the blank - discharging oil cylinder / blank - discharging air cylinder drives the lifting plate to lift upward. The lifting plate will drive the material - sliding seat to move upward relative to the lower mold core through the second connecting columns. The arrangement of the first connecting columns provides an installation position for the blank - discharging oil cylinder / blank - discharging air cylinder, preventing it from being suspended.

[0028] Compared with the prior art, the present hot - stamping die has the following advantages:

[0029] 1. By fixedly connecting the two half - molds to the fixed mold base and the moving mold base respectively, and driving the moving mold base to move backward by the clamping oil cylinder to achieve that when separating the molds, the mold core can move backward relative to the fixed mold base to automatically eject the valve body from the half - mold at the fixed mold base. The fact that the moving mold base moves backward a greater distance than the mold core during mold separation ensures that the valve body will not be stuck on the half - mold at the moving mold base. Combined with the setting of the blank - discharging structure, automatic demolding and blank - discharging of the formed valve body are realized, improving production efficiency.

[0030] 2. The clamping oil cylinder can provide a stable clamping force for the female mold, ensuring that the two half - molds are stably closed together when the upper punch presses down to form the valve body, so that there will be no gap between the two half - molds due to the impact force of the upper punch, thus greatly reducing the burrs and flash on the outside of the formed valve body. Brief Description of the Drawings

[0031] Figure 1 is a three-dimensional schematic diagram of the present red punching die in the mold-closing state.

[0032] Figure 2 is a top view of the present red punching die in the mold-closing state.

[0033] Figure 3 is Figure 2 a sectional view taken along the A-A direction in

[0034] Figure 4 is a side view of the present red punching die.

[0035] Figure 5 is Figure 4 a sectional view taken along the B-B direction in

[0036] Figure 6 is Figure 4 a sectional view taken along the C-C direction in

[0037] Figure 7 is a connection schematic diagram between the lower die core and the material chute seat.

[0038] Figure 8 is a three-dimensional schematic diagram of the present red punching die in the mold-opening state.

[0039] Figure 9 is a sectional view of the present red punching die in the mold-opening state (the sectional view angle is the same as that of Figure 3 )

[0040] Figure 10 is another sectional view of the present red punching die in the mold-opening state (the sectional view angle is the same as that of Figure 5 )

[0041] In the figure, 1. mounting seat; 1a. mounting groove; 1b. guiding groove; 2. female die; 2b. half die; 3. fixed die seat; 3a. second chute; 4. moving die seat; 4a. first chute; 4b. mating groove; 5. mold locking oil cylinder; 6. material chute seat; 6a. material chute surface; 6b. stop surface; 7. side die core; 8. ejector rod; 9. core pulling driving part; 10. sliding block; 11. return spring; 12. acting spring; 13. ejecting cylinder; 14. connecting head; 15. acting rod; 16. sliding seat; 17. connecting seat; 18. lower die core; 19. material discharging driving part; 20. movable block; 21. mating block; 22. first connecting column; 23. lifting plate; 24. connecting plate; 25. second connecting column; 26. die core. Detailed Description of the Invention

[0042] The following are specific embodiments of the present utility model and, in conjunction with the accompanying drawings, the technical solutions of the present utility model will be further described. However, the present utility model is not limited to these embodiments.

[0043] Embodiment 1

[0044] As Figure 1 、 Figure 2 and Figure 8 shown, a red punching die includes a mounting base 1, a female die 2 and a die core 26. The mounting base 1 is provided with a mounting groove 1a penetrating in the vertical direction. The female die 2 and the die core 26 are both located in the mounting groove 1a. The female die 2 includes two relatively arranged half dies 2b. In the closed die state, part of the die core 26 is located in the female die 2. Here, the closed die refers to the closing of the two half dies 2b. Then, the separation of the two half dies 2b is naturally the opening of the die. In practice, the female die 2 has a cavity and a feeding hole with the lower end orifice communicating with the cavity. Of course, the feeding hole and the cavity are also formed after the two half dies 2b are closed. The same as the existing ones, this red punching die is also used to form a valve body from a round bar stock. The settings of the cavity of the female die 2 and the die core 26 depend on the shape of the valve body to be formed. When in use, it is also the manipulator that puts the round bar stock heated by the red punching furnace into the feeding hole, and then the upper punch presses down to press the round bar stock into the feeding hole and form a shape matching the cavity. The existence of the die core 26 ensures that the formed valve body has a hole by itself.

[0045] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 7As shown, a fixed mold base 3 is fixedly connected in the installation groove 1a and a movable mold base 4 is slidably connected along the front-rear direction. Slide rails for the movable mold base 4 to slide are fixedly connected to both the left and right side walls of the installation groove 1a and are arranged along the front-rear direction. The fixed mold base 3 is located in front of the movable mold base 4. The two half molds 2b are respectively connected to the fixed mold base 3 and the movable mold base 4 through fasteners. A mold clamping oil cylinder 5 is fixedly connected to the rear side of the installation base 1. The piston of the mold clamping oil cylinder 5 extends into the installation groove 1a and is fixedly connected to the rear side of the movable mold base 4. The movement of the piston of the mold clamping oil cylinder 5 can drive the movable mold base 4 to approach the fixed mold base 3 for mold closing or drive the movable mold base 4 to move away from the fixed mold base 3 for mold opening. When the mold is opened, the mold core 26 can move backward relative to the fixed mold base 3, and the distance that the movable mold base 4 moves backward when the mold is opened is greater than the distance that the mold core 26 moves backward. A discharging structure for discharging materials from the mold core 26 after mold opening is provided on the installation base 1. A material chute seat 6 is provided at the lower slot opening of the installation groove 1a. The top of the material chute seat 6 has a material chute surface 6a that is inclined downward. The material chute seat 6 is located below the area between the two half molds 2b after mold opening. In this embodiment, the number of the material chute surfaces 6a is two, and the two material chute surfaces 6a are arranged back to back. The connection method between the half mold 2b and the fixed mold base 3 can be directly connecting with fasteners, or a clamping groove can be provided downward on the top of the fixed mold base 3, and then the half mold 2b is clamped in the clamping groove and a pressing block is fixedly connected to the top of the fixed mold base 3 with fasteners to fix the half mold 2b. The connection method between the half mold 2b and the movable mold base 4 also adopts the same method. In practice, the mold clamping oil cylinder 5 is selected as an oil cylinder on the market that can be connected to a gas-liquid booster cylinder at the rear end, so that the gas-liquid booster cylinder can be connected to assist the mold clamping oil cylinder 5 to further increase the mold clamping force.

[0046] As Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 8 and Figure 10As shown in the figure, the mold core 26 includes two side mold cores 7. The two side mold cores 7 are cylindrical and are arranged opposite to each other in the left-right direction. The unloading structure includes two ejector rods 8 both arranged in the left-right direction, two ejector driving components corresponding to the two ejector rods 8 one by one, and two core-pulling driving parts 9 corresponding to the two side mold cores 7 one by one. The two ejector rods 8 are respectively inserted into the two side mold cores 7. The ejector driving component can drive the corresponding ejector rod 8 to move, and the core-pulling driving part 9 can drive the corresponding side mold core 7 to move away from the other side mold core 7. Guide grooves 1b are respectively provided through the left and right sides of the mounting base 1. The two guide grooves 1b are arranged opposite to each other and are both communicated with the mounting groove 1a. The guide grooves 1b are arranged in a strip shape in the front-back direction. Slide blocks 10 are slidably arranged in the two guide grooves 1b. The two side mold cores 7 are respectively connected to the two slide blocks 10. The length of the slide block 10 in the front-back direction is less than the length of the guide groove 1b. Two mounting holes are respectively provided in the mounting base 1. The two mounting holes respectively penetrate through the front side walls of the two guide grooves 1b. Return springs 11 are respectively arranged in the two mounting holes. The rear ends of the two return springs 11 respectively abut against the front sides of the corresponding slide blocks 10. The mounting holes penetrate through the front side wall of the mounting base 1. A plug is fixed in the front end orifice of the mounting hole. The front end of the return spring 11 abuts against the plug. In this embodiment, the ejector driving component includes a compression spring 12 and an ejector cylinder 13 (of course, it can also be an ejector oil cylinder). Part of the ejector rod 8 is located in the slide block 10. The core-pulling driving part 9 is a core-pulling oil cylinder (of course, it can also be a core-pulling cylinder) and is linked with the corresponding slide block 10 in the front-back direction. A connecting head 14 is fixedly connected to the piston end of the core-pulling oil cylinder. One end of the connecting head 14 is threadedly connected in the corresponding slide block 10. The compression spring 12 is sleeved outside the ejector rod 8 located in the slide block 10, and the ejector rod 8 abuts against the end of the connecting head 14 located in the slide block 10 under the elastic force of the compression spring 12. An actuating rod 15 is inserted into the connecting head 14. One end of the actuating rod 15 extends out of the piston of the core-pulling oil cylinder and is fixedly connected to the piston end of the ejector cylinder 13. The actuating rod 15 can abut against the ejector rod 8 when moving towards the mounting groove 1a. Specifically, slide seats 16 are respectively slidably connected to the left and right sides of the mounting base 1. Slide rails arranged in the front-back direction and for the slide seats 16 to slide are respectively fixedly connected to the left and right sides of the mounting base 1. The two core-pulling oil cylinders are respectively fixedly connected to the two slide seats 16. Connecting seats 17 are respectively fixedly connected to the cylinder bodies of the two core-pulling oil cylinders. The cylinder bodies of the two ejector cylinders 13 are respectively fixedly connected to the two connecting seats 17.

[0047] Further, as Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 9As shown, the mold core 26 further includes a lower mold core 18. The lower mold core 18 is cylindrical. The material chute seat 6 is sleeved outside the lower mold core 18. The unloading structure further includes the top of the material chute seat 6 and a material discharging driving member 19 capable of driving the material chute seat 6 to move upward. In practice, the top of the material chute seat 6 has a horizontal stop surface 6b, and the stop surface 6b is connected to the upper end of the material chute surface 6a. An active block 20 is provided in the lower end notch of the installation groove 1a, and the lower mold core 18 is connected to the active block 20 (in practice, the lower end of the lower mold core 18 is threadedly connected inside the active block 20). The active block 20 is rectangular in the front-back direction, and the rear end of the active block 20 is slidably arranged inside the lower end of the moving mold base 4. Among them, a first chute 4a is provided in the lower end of the moving mold base 4 in the front-back direction, and a second chute 3a is provided in the fixed mold base 3 near the lower end position in the front-back direction. The front end of the active block 20 is located in the second chute 3a and the rear end of the active block 20 is located in the first chute 4a. A matching structure is provided between the active block 20 and the moving mold base 4. When the moving mold base 4 is closed, it can first move forward until the half mold 2b fixedly connected to it abuts against the upper end of the lower mold core 18 and then drive the active block 20 to move forward together through the matching structure. And when the moving mold base 4 is opened, it can first move backward until the half mold 2b fixedly connected to it is separated from the upper end of the lower mold core 18 and then drive the active block 20 to move backward together through the matching structure. Specifically, the matching structure includes a matching groove 4b provided on the side of the moving mold base 4 and a matching block 21 fixedly connected to the rear end side of the active block 20. The matching groove 4b is strip-shaped in the front-back direction. Part of the matching block 21 is located in the matching groove 4b. The length of the matching block 21 in the front-back direction is less than that of the matching groove 4b. In the closed mold state, the matching block 21 abuts against the rear side wall of the matching groove 4b. A plurality of first connecting columns 22 are fixedly connected to the bottom of the active block 20. The material discharging driving member 19 is a material discharging oil cylinder (of course, it can also be a material discharging air cylinder). The cylinder body of the material discharging oil cylinder is fixedly connected to the lower end of each first connecting column 22. The piston end of the material discharging oil cylinder is fixedly connected with a lifting plate 23. A connecting plate 24 is abutted on the active block 20, and the material chute seat 6 is fixedly connected to the connecting plate 24. A plurality of second connecting columns 25 are fixedly connected between the lifting plate 23 and the material chute seat 6.

[0048] During actual use, the moving mold base 4 is driven by the mold clamping oil cylinder 5 to abut against the fixed mold base 3, so that the two half molds 2b are closed to form the female mold 2. The mold clamping oil cylinder 5 can provide a stable mold clamping force for the female mold 2 (in practice, only by controlling the oil supply pressure to ensure that the mold clamping force formed by the mold clamping oil cylinder 5 is greater than the impact force of the upper punch). In this way, when the upper punch presses down to form the valve body, it can ensure that the two half molds 2b are stably closed together, so that there will be no gap between the two half molds 2b due to the impact force of the upper punch, thus greatly reducing the burrs and flash on the outside of the formed valve body.

[0049] The two side die cores 7 are used to make holes at the left and right ends of the valve body formed in the female die 2, while the lower die core 18 is used to make a hole at the lower end of the valve body formed in the female die 2. By using or disassembling the side die cores 7 and the lower die core 18, and combining with the replacement of the female die 2 with different cavity shapes, the hot stamping die can at least realize the forming and automatic unloading of the following several valve bodies: 1. Without holes at the lower end but with holes on both left and right sides; 2. Only with holes at the lower end and without holes on both left and right sides; 3. With holes at the lower end and holes on both left and right sides; 4. With holes at the lower end and only with holes on the left or right side.

[0050] For the valve body of the first shape, since the lower die core 18 is not used, the lower die core 18 is disassembled before forming, and the two actuating rods 15 are pushed by the pistons of the two pushing cylinders 13 to push the corresponding ejector rods 8 to a state where one end of each ejector rod is flush with one end of the corresponding side die core 7 located in the female die 2. After the valve body is formed, the two side die cores 7 are inserted into the valve body, and the valve body is clamped between the two ejector rods 8. When the mold is split, the moving die base 4 is driven by the clamping cylinder 5 to move backward. At the same time, the two sliding blocks 10 move backward under the action of the return springs 11, so that the two side die cores 7 together with the valve body are separated from the half die 2b on the fixed die base 3. When the sliding blocks 10 move to abut against the rear side wall of the guide groove 1b, the moving die base 4 continues to move backward. In this way, in the final mold-splitting state, the two side die cores 7 and the valve body are located in the area between the two half dies 2b. Then, while maintaining the pistons of the pushing cylinders 13 in the pushed-out state, the pistons of the two core-pulling cylinders act simultaneously to drive the two sliding blocks 10 to move away from each other. Since the valve body is also pushed by the two ejector rods 8 in the left-right direction, the two side die cores 7 can be pulled out of the valve body. Finally, by controlling the pistons of the two pushing cylinders 13 to retract, the two actuating rods 15 will no longer abut against the two ejector rods 8, and the two ejector rods 8 will move away from each other under the action of their respective action springs 12, thereby loosening the formed valve body. The loosened valve body will fall on the material chute surface 6a of the material chute seat 6 and automatically slide out of the mounting seat 1 by means of the slope of the material chute surface 6a.

[0051] For the valve body of the second shape, since neither of the two side die cores 7 is used, the two sliding blocks 10 and the two side die cores 7 are removed from the mounting seat 1 before molding. After the valve body is molded, the lower die core 18 is inserted into the valve body. During mold splitting, the clamping cylinder 5 drives the moving die seat 4 to move backward. The moving die seat 4 first moves relative to the movable block until the front side wall of the mating groove 4b abuts against the mating block 21, causing the lower die core 18 together with the valve body to separate from the female die 2 on the moving die seat 4. Then, the moving die seat 4 drives the movable block to move backward together, separating the valve body from the female die 2 on the fixed die seat 3. In this way, in the final mold-split state, the lower die core 18 and the valve body are located in the area between the two half dies 2b. Next, the piston of the ejector cylinder drives the lifting plate 23 to lift upward. The lifting plate 23 drives the chute seat 6 to move upward relative to the lower die core 18 through the second connecting columns 25. In this way, the top of the chute seat 6 will push the valve body inserted at the upper end of the lower die core 18 upward until the entire valve body is pushed out from the upper end of the lower die core 18. The pushed-out valve body will fall on the chute surface 6a of the chute seat 6 and automatically slide out of the mounting seat 1 by means of the slope of the chute surface 6a.

[0052] For the valve body of the third shape, after the valve body is molded, both the two side die cores 7 and the lower die core 18 are inserted into the valve body. When in use, the two return springs 11 are removed from the mounting seat 1. During mold splitting, the clamping cylinder 5 drives the moving die seat 4 to move backward. The moving die seat 4 first moves relative to the movable block until the front side wall of the mating groove 4b abuts against the mating block 21, causing the lower die core 18 to separate from the female die 2 on the moving die seat 4. During this process, the lower die core 18, the two side die cores 7 and the valve body remain stationary. After that, the moving die seat 4 drives the movable block 20 to move backward together by the abutment of the front side wall of the mating groove 4b and the mating block 21. In this way, the lower die core 18, the valve body and the two side die cores 7 will all move backward together with the movable block and separate from the female die 2 on the fixed die seat 3. In this way, in the final mold-split state, the lower die core 18, the two side die cores 7 and the valve body are located in the area between the two half dies 2b. Next, the pistons of the two core-pulling cylinders act simultaneously to drive the two sliding blocks 10 to move away from each other, directly pulling out the two side die cores 7 from the valve body (the push cylinder 13 does not work all the time, so the push rod 8 moves synchronously with the corresponding side die core 7). Then, the piston of the ejector cylinder drives the lifting plate 23 to lift upward. The lifting plate 23 drives the chute seat 6 to move upward relative to the lower die core 18 through the second connecting columns 25. In this way, the top of the chute seat 6 will push the valve body inserted at the upper end of the lower die core 18 upward until the entire valve body is pushed out from the upper end of the lower die core 18. The pushed-out valve body will fall on the chute surface 6a of the chute seat 6 and automatically slide out of the mounting seat 1 by means of the slope of the chute surface 6a.

[0053] For the valve body of the fourth shape, since only one side die core 7 is used, before molding, the unused side die core 7 and the corresponding sliding block 10 are removed from the mounting seat 1, and the two return springs 11 are also taken out from the mounting seat 1. After the valve body is molded, the lower die core 18 and the side die core 7 are inserted into the valve body. When parting the mold, the clamping cylinder 5 drives the moving die base 4 to move backward. The moving die base 4 will first move relative to the movable block until the front side wall of the fitting groove 4b abuts against the fitting block 21, causing the lower die core 18 to separate from the female die 2 on the moving die base 4. During this process, the lower die core 18, the side die core 7 and the valve body remain stationary. Then, the moving die base 4 will drive the movable block 20 to move backward together by the abutment of the front side wall of the fitting groove 4b and the fitting block 21. In this way, the lower die core 18, the valve body and the side die core 7 will all move backward with the movable block and separate from the female die 2 on the fixed die base 3. In this way, in the final mold parting state, the lower die core 18, the side die core 7 and the valve body are located in the area between the two half molds 2b. Then, the piston of the core-pulling cylinder acts to drive the corresponding sliding block 10 to move outward from the mounting seat 1 to directly pull out the side die core 7 from the valve body. Then, the piston of the ejection cylinder drives the lifting plate 23 to lift upward. The lifting plate 23 will drive the material chute seat 6 to move upward relative to the lower die core 18 through the second connecting columns 25. In this way, the top of the material chute seat 6 will push the valve body inserted at the upper end of the lower die core 18 upward until the valve body is completely pushed out from the upper end of the lower die core 18. The pushed-out valve body will fall on the material chute surface 6a of the material chute seat 6 and automatically slide out of the mounting seat 1 by means of the slope of the material chute surface 6a.

[0054] Embodiment 2

[0055] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that: in this embodiment, the fitting structure includes a linkage block fixedly connected to the lower end inside the moving die base 4 and a linkage groove provided on the rear side of the movable block 20. The linkage groove is arranged in a strip shape along the front-rear direction. The linkage block is partially located in the linkage groove. The length of the linkage block along the front-rear direction is less than that of the linkage groove. In the mold closing state, the linkage block abuts against the front side wall of the linkage groove.

[0056] In the mold closing state, the linkage block abuts against the front side wall of the linkage groove. Since the length of the fitting block 21 along the front-rear direction is less than that of the linkage groove, the moving die base 4 can move backward a short distance relative to the movable seat during mold parting, so that the half mold 2b on the moving die base 4 is separated from the lower die core 18. When the moving die base 4 moves backward until the linkage block abuts against the rear side wall of the linkage groove, the moving die base 4 can drive the movable block to move together, so that the lower die core 18 is separated from the fixed die base 3, ensuring that in the final mold parting state, the lower die core 18 is separated from both the moving die base 4 and the fixed die base 3 at the same time.

[0057] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but they will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A hot stamping die, comprising a mounting seat (1) having a mounting groove (1a) extending vertically therethrough, and a die (2) and a core (26) both disposed in the mounting groove (1a), wherein the die (2) comprises two half-dies (2b) disposed opposite to each other, and in a closed mold state, part of the core (26) is located in the die (2), characterized in that: The mounting groove (1a) is fixedly connected with a fixed mold base (3) and is slidably connected with a movable mold base (4) in the front-rear direction. The fixed mold base (3) is located in front of the movable mold base (4). The two half molds (2b) are respectively connected to the fixed mold base (3) and the movable mold base (4). A clamping cylinder is fixed to the side of the mounting base (1). The clamping cylinder can drive the movable mold base (4) to approach or move away from the fixed mold base (3). The mold core (26) can move backward relative to the fixed mold base (3) during mold separation, and the distance that the movable mold base (4) moves backward during mold separation is greater than the distance that the mold core (26) moves backward. The mounting base (1) is provided with a discharge structure that can discharge material from the mold core (26) after mold separation.

2. The red punching die according to claim 1, characterized in that: A material sliding seat (6) is provided at the lower end notch of the installation groove (1a), and the top of the material sliding seat (6) has a material sliding surface (6a) inclined downward, and the material sliding seat (6) is located below the area between the two half molds (2b) after mold separation.

3. The red punching die according to claim 2, characterized in that: The mold core (26) comprises two side mold cores (7), and the two side mold cores (7) are arranged opposite to each other in the left-right direction. The unloading structure comprises two push rods (8) both arranged in the left-right direction, two push drive assemblies corresponding to the two push rods (8) one by one, and two core pulling drive components (9) corresponding to the two side mold cores (7) one by one. The two push rods (8) are respectively inserted into the two side mold cores (7), the push drive components can drive the corresponding push rods (8) to move, and the core pulling drive components (9) can drive the corresponding side mold core (7) away from the other side mold core (7).

4. The red punching die according to claim 3, characterized in that: The left and right sides of the mounting seat (1) are respectively penetrated by guide grooves (1b), the two guide grooves (1b) are both arranged in a strip shape along the front-to-back direction, the two guide grooves (1b) are both connected to the mounting groove (1a), a sliding block (10) is arranged in the two guide grooves (1b), the two side mold cores (7) are respectively connected to the two sliding blocks (10), the length of the sliding block (10) along the front-to-back direction is less than the length of the guide groove (1b), and two return springs (11) are correspondingly arranged in the mounting seat (1), and the rear end of the return spring (11) is against the front side of the sliding block (10).

5. The red punching die according to claim 4, characterized in that: The push drive assembly comprises an action spring (12) and a push cylinder (13) / pushing oil cylinder, the push rod (8) is partially located in the sliding block (10), the core pulling drive member (9) is a core pulling oil cylinder / core pulling air cylinder and is linked with the corresponding sliding block (10) in the front-rear direction, the piston end of the core pulling oil cylinder / core pulling air cylinder is fixedly connected with a connector (14), one end of the connector (14) is threadedly connected in the corresponding sliding block (10), the action spring (12) is sleeved on the sliding block ( The push rod (8) is located outside the push rod (8) in the mounting groove (10) and the push rod (8) abuts against the end of the connector (14) located in the sliding block (10) under the elastic force of the action spring (12). An action rod (15) is inserted into the connector (14). One end of the action rod (15) extends out of the piston of the core pulling cylinder / core pulling cylinder and is fixedly connected to the end of the piston of the push cylinder (13) / pushing cylinder. When the action rod (15) moves into the mounting groove (1a), it can abut against the push rod (8).

6. The red punching die according to claim 5, characterized in that: The left and right sides of the mounting seat (1) are respectively slidably connected with sliding seats (16), the two core-pulling oil cylinders / core-pulling air cylinders are respectively fixedly connected to the two sliding seats (16), the cylinder bodies of the two core-pulling oil cylinders / core-pulling air cylinders are respectively fixedly connected to connecting seats (17), and the cylinder bodies of the two pushing air cylinders (13) / pushing oil cylinders are respectively fixedly connected to the two connecting seats (17).

7. The red punching die according to claim 2, characterized in that: The mold core (26) includes a lower mold core (18), a material sliding seat (6) is sleeved outside the lower mold core (18), and the unloading structure includes the top of the material sliding seat (6) and a material unloading driving member (19) capable of driving the material sliding seat (6) to move upward.

8. The red punching die according to claim 7, characterized in that: A movable block (20) is provided in the groove at the lower end of the installation groove (1a), the lower mold core (18) is connected to the movable block (20), the rear end of the movable block (20) is slidably arranged in the lower end of the movable mold base (4), a matching structure is provided between the movable block (20) and the movable mold base (4), the movable mold base (4) can first move forward until the half mold (2b) fixedly connected thereto abuts against the upper end of the lower mold core (18) when the mold is closed, and then drive the movable block (20) to move forward together through the matching structure, and the movable mold base (4) can first move backward until the half mold (2b) fixedly connected thereto is separated from the upper end of the lower mold core (18) when the mold is opened, and then drive the movable block (20) to move backward together through the matching structure.

9. The red punching die according to claim 8, characterized in that: The matching structure comprises a matching groove (4b) arranged on the side of the movable mold base (4) and a matching block (21) fixedly connected to the rear end side of the movable block (20), the matching groove (4b) is arranged in a strip shape along the front-to-back direction, the matching block (21) is partially located in the matching groove (4b), the length of the matching block (21) along the front-to-back direction is smaller than the matching groove (4b), and in the mold closing state, the matching block (21) abuts against the rear side groove wall of the matching groove (4b), or, the matching structure comprises a linkage block fixedly connected to the lower end of the movable mold base (4) and a linkage groove arranged on the rear end side of the movable block (20), the linkage groove is arranged in a strip shape along the front-to-back direction, the linkage block is partially located in the linkage groove, the length of the linkage block along the front-to-back direction is smaller than the linkage groove, and in the mold closing state, the linkage block abuts against the front side groove wall of the linkage groove.

10. The red punching die according to claim 8 or 9, characterized in that: The bottom of the movable block (20) is fixedly connected to a plurality of connecting columns (22); the material return drive member (19) is a material return oil cylinder / material return air cylinder; the cylinder body of the material return oil cylinder / material return air cylinder is fixedly connected to the lower end of each connecting column (22); the piston end of the material return oil cylinder / material return air cylinder is fixedly connected to a lifting plate (23); a connecting plate (24) is abutted against the movable block (20); a material sliding seat (6) is fixedly connected to the connecting plate (24); and a plurality of connecting columns (25) are fixedly connected between the lifting plate (23) and the material sliding seat (6).

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