Combined cold extrusion forming die with split structure

Abstract

The utility model discloses a combined cold extrusion forming die with a split structure, which relates to the technical field of gear processing and comprises a forming die and equally-divided dies, a die core is mounted in the middle of the inside of the forming die, and the equally-divided dies are mounted in a middle die sleeve in an annular array manner. According to the combined type cold extrusion forming die of the split structure, through the equally-divided die bodies arranged in an annular array, flexible structure replacement and maintenance can be conducted on the die according to damaged parts through the equally-divided structure arrangement of the structure, and the die cost is reduced while the convenience of mass production of the die structure is reduced. In addition, the forming die, the die core, the middle die sleeve and the equally-divided die are connected through an embedded structure, flexible structural disassembly and assembly can be achieved in cooperation with use of a first pin, a second pin and a third pin, the overall structural maintenance is facilitated, and the production efficiency is improved. And high cost caused by replacement and maintenance of the whole device is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing, and particularly relates to a split-structure combined cold extrusion forming die. Background Technique

[0002] The split-structure combined cold extrusion forming die is a special cold extrusion die design, which is characterized in that the main components of the die are designed as a split combined structure. The main advantage of this design is to reduce the processing cost of the die and improve the production efficiency at the same time. By adopting this split-structure combined design, the vulnerable parts can be conveniently replaced without replacing the whole die, so as to adapt to different production requirements and improve the interchangeability and versatility of the die.

[0003] In the current forging industry, gears generally adopt the forging scheme of warm forging + sizing. The die life is also improved a lot compared with direct cold extrusion forming. However, for some complex gears, such as bevel gears with ridges on the end face and gears with ears on the outer circle contour, the forging is difficult. Due to the high requirements for the end face teeth and the outer circle ears, the cold extrusion forming scheme is usually selected. When forming, in order to meet the product requirements, a relatively large tonnage is usually required. And the finishing lower die (forming die) usually adopts the press-fitting processing of the insert sleeve and the die core. Although some problems of early die failure are solved, for gears with ridges on the end face and ears on the outer circle, such die processing methods do not significantly improve the die life. Currently, when the number of parts reaches 300 to 400, cracks appear at the ears on the outer contour of the forming die, and the die fails early. This problem seriously restricts the large-scale automated production of such products.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a split-structure combined cold extrusion forming die is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a split-structure combined cold extrusion forming die to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: A split-structure combined cold extrusion forming die includes a forming die and an equalizing die. A die core is installed in the middle of the forming die, and a middle die sleeve is installed in the middle of the side of the die core away from the forming die. The equalizing dies are annularly and arrayedly installed inside the middle die sleeve. A first pin is connected between the forming die and the die core, a second pin is connected between the die core and the middle die sleeve, and a third pin is connected between the middle die sleeve and the equalizing dies. The equalizing die includes a die body, a connecting hole and an assembly hole. A connecting hole is opened on one side of the die body, and an assembly hole is opened on the side of the die body away from the connecting hole.

[0007] Furthermore, the forming die includes a main die sleeve, a fixing groove, fixing posts, a stress sleeve, and a strengthening sleeve. A fixing groove is formed in the middle of one side of the main die sleeve, and fixing posts are annularly arranged inside the fixing groove. The stress sleeve is sleeved outside the main die sleeve, and the strengthening sleeve is connected to the outside of the stress sleeve.

[0008] Furthermore, the die core includes a main core body, an annular groove, docking holes, fixing holes, and mounting holes. An annular groove is formed in one side of the main core body, and docking holes are annularly arranged inside the annular groove. Fixing holes and mounting holes are respectively annularly arranged on the side of the main core body away from the annular groove.

[0009] Furthermore, the middle die sleeve includes a sub-die sleeve, a fixing ring, limiting posts, and docking posts. A fixing ring is connected to one side of the sub-die sleeve, and limiting posts are annularly arranged inside the fixing ring. Docking posts are annularly arranged on the side of the sub-die sleeve away from the limiting posts.

[0010] Furthermore, the inner surface structure of the fixing groove matches the outer surface structure of the main core body, the outer surface structure of the fixing post matches the inner surface structure of the fixing hole. A hole for installing a third pin is formed in the side of the main die sleeve away from the fixing groove and penetrates through the inside of the fixing post. The inner wall of the stress sleeve closely adheres to the side surface of the main die sleeve, and the side structure of the stress sleeve matches the inner wall structure of the strengthening sleeve.

[0011] Furthermore, the inner surface structure of the annular groove matches the outer surface structure of the sub-die sleeve, and the inner surface structure of the fixing ring matches the outer surface structure of the die body.

[0012] Furthermore, the outer surface structure of the limiting post matches the inner surface structure of the assembly hole, and the outer surface structure of the docking post matches the inner surface structure of the docking hole.

[0013] Furthermore, the equalizing die adopts an embedded structure and is annularly arranged inside the middle die sleeve. The middle die sleeve is installed on one side surface of the die core by an embedded structure, and the die core is installed in the middle of the forming die by a completely embedded structure.

[0014] The utility model provides a split-structure combined cold extrusion forming die, which has the following beneficial effects:

[0015] 1. In this utility model, by providing equally divided molds and combining the equally divided molds arranged in a circular array into a complete mold structure. The assembly hole on one side of the mold body is inserted and docked with the internal limiting post of the fixed ring. Then, the first pin is screwed into the connection hole and the internal limiting post, so that the equally divided molds and the middle mold sleeve can be quickly combined and docked. By using the above structure, on the one hand, by equally dividing the entire mold structure into multiple modules, the mass production problem of the mold can be improved, thereby reducing the production cost of the mold itself. On the other hand, the use of this structure also makes it possible that when the mold is damaged and needs to be replaced and maintained, only the damaged equally divided mold needs to be disassembled and replaced according to the corresponding position, thus reducing the mold maintenance cost and ensuring the flexibility and convenience during the maintenance of the entire mold. In addition, since a stress sleeve with an annular structure is sleeved on the outside of the main mold sleeve, and a reinforcement sleeve is further arranged outside the stress sleeve, and the reinforcement sleeve is fixed on the installation structural surface of the operating table, the mold core embedded in the fixed groove has sufficient support and protection, provides a good structural pre-tightening force by the surrounding forming molds, and absorbs and disperses the extrusion force received, so as to ensure its structural integrity to the greatest extent, reduce the situation of structural fragmentation due to huge forces in the early stage of processing operations, thereby improving the overall service life and ensuring the processing quality of the workpiece.

[0016] 2. In this utility model, the forming mold, the mold core and the middle mold sleeve are arranged by adopting an embedded structure. Only the fixed hole on one side of the main core body needs to be inserted and docked with the fixed post inside the fixed groove, and then the forming mold and the mold core are connected and fixed by using the third pin from the hole on the back side of the main mold sleeve. For the auxiliary mold sleeve, only one side needs to be inserted into the internal annular groove and connected and inserted with the docking hole, and then the second pin is screwed in from the installation hole, so that the mold core and the middle mold sleeve can be quickly connected and fixed to each other. By using the above structure, it can further make the entire mold structure have sufficient flexibility in disassembly and assembly. Modularizing the entire mold can relatively simplify the difficulty of mass production, reduce the mold production cost and improve the production efficiency, and at the same time enable convenient transportation and movement through the split structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic side view structure diagram of the body of a split structure combined cold extrusion forming mold of the present utility model;

[0018] Figure 2 It is a schematic structure diagram of the forming mold of a split structure combined cold extrusion forming mold of the present utility model;

[0019] Figure 3 It is a schematic three-dimensional structure diagram of the mold core of a split structure combined cold extrusion forming mold of the present utility model;

[0020] Figure 4 This is a three-dimensional structural schematic diagram of the middle die sleeve of a split-structure combined cold extrusion forming die of the present utility model;

[0021] Figure 5 This is a three-dimensional structural schematic diagram of an equally divided die of a split-structure combined cold extrusion forming die of the present utility model.

[0022] In the figure: 1, forming die; 101, main die sleeve; 102, fixing groove; 103, fixing pile; 2, die core; 201, main core body; 202, annular groove; 203, docking hole; 204, fixing hole; 205, mounting hole; 3, middle die sleeve; 301, sub-die sleeve; 302, fixing ring; 303, limiting pile; 304, docking pile; 4, equally divided die; 401, die body; 402, connecting hole; 403, assembly hole; 5, first pin; 6, second pin; 7, third pin. Specific embodiments

[0023] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0024] As Figures 1 to 5 shown, a split-structure combined cold extrusion forming die includes a forming die 1 and an equally divided die 4. A die core 2 is installed in the middle inside the forming die 1, and a middle die sleeve 3 is installed in the middle on the side of the die core 2 away from the forming die 1. The equally divided dies 4 are installed in an annular array inside the middle die sleeve 3. A first pin 5 is connected between the forming die 1 and the die core 2, a second pin 6 is connected between the die core 2 and the middle die sleeve 3, and a third pin 7 is connected between the middle die sleeve 3 and the equally divided die 4. The equally divided die 4 includes a die body 401, a connecting hole 402, and an assembly hole 403. A connecting hole 402 is opened on one side of the die body 401, and an assembly hole 403 is opened on the side of the die body 401 away from the connecting hole 402. The equally divided die 4 is arranged in an annular array inside the middle die sleeve 3 in an embedded structure, and the middle die sleeve 3 is installed on one side surface of the die core 2 in an embedded structure, and the die core 2 is installed in the middle of the forming die 1 in a completely embedded structure. The equally divided dies 4 arranged in an annular array are combined into a complete die structure. Among them, the assembly hole 403 on one side of the die body 401 is inserted and docked with the internal limiting pile 303 of the fixing ring 302, and then the first pin 5 is screwed into the internal of the connecting hole 402 and the limiting pile 303, so that the equally divided die 4 and the middle die sleeve 3 can be quickly combined and docked.

[0025] As Figures 1 to 5As shown in the figure, the forming die 1 includes a main die sleeve 101, a fixing groove 102, fixing posts 103, a stress sleeve 104 and a strengthening sleeve 105. In the middle of one side of the main die sleeve 101, there is a fixing groove 102, and fixing posts 103 are installed in an annular array inside the fixing groove 102. Moreover, a stress sleeve 104 is sleeved outside the main die sleeve 101, and a strengthening sleeve 105 is connected to the outside of the stress sleeve 104. The die core 2 includes a main core body 201, an annular groove 202, docking holes 203, fixing holes 204 and mounting holes 205. An annular groove 202 is provided on one side of the main core body 201, and docking holes 203 are provided in an annular array inside the annular groove 202. Moreover, fixing holes 204 and mounting holes 205 are respectively provided in an annular array on the side of the main core body 201 away from the annular groove 202. The middle die sleeve 3 includes a sub-die sleeve 301, a fixing ring 302, limiting posts 303 and docking posts 304. A fixing ring 302 is connected to one side of the sub-die sleeve 301, and limiting posts 303 are provided in an annular array inside the fixing ring 302. Moreover, docking posts 304 are provided in an annular array on the side of the sub-die sleeve 301 away from the limiting posts 303. The inner surface structure of the fixing groove 102 matches the outer surface structure of the main core body 201, the outer surface structure of the fixing post 103 matches the inner surface structure of the fixing hole 204. On the side of the main die sleeve 101 away from the fixing groove 102, there is a hole for installing the third pin 7, which penetrates through the inside of the fixing post 103. Moreover, the inner wall of the stress sleeve 104 is closely attached to the side surface of the main die sleeve 101, and the side structure of the stress sleeve 104 matches the inner wall structure of the strengthening sleeve 105. The inner surface structure of the annular groove 202 matches the outer surface structure of the sub-die sleeve 301, the inner surface structure of the fixing ring 302 matches the outer surface structure of the mold body 401, the outer surface structure of the limiting post 303 matches the inner surface structure of the assembly hole 403, and the outer surface structure of the docking post 304 matches the inner surface structure of the docking hole 203. Only need to dock and insert the fixing post 103 inside the fixing hole 204 on one side of the main core body 201 and the fixing groove 102, and then use the third pin 7 to connect and fix the forming die 1 and the die core 2 from the hole on the back side of the main die sleeve 101. For the sub-die sleeve 301, only need to insert one side into the inside of the annular groove 202 and connect and insert it with the docking hole 203, and then use the second pin 6 to screw it into the mounting hole 205, then the die core 2 and the middle die sleeve 3 can be quickly connected and fixed to each other.

[0026] In summary, as Figures 1 to 5 shown, for this split-structure combined cold extrusion forming die, during use, first insert the main die sleeve 101 into the inside of the stress sleeve 104, then fix the strengthening sleeve 105 on the installation structural surface of the operation table, and then embed and install the stress sleeve 104 with the main die sleeve 101 installed inside the middle of the strengthening sleeve 105, so as to provide effective structural support and installation stability for the installation of subsequent structures.

[0027] The assembly hole 403 on one side of the mold body 401 is inserted and docked with the limit post 303 on one side of the sub-mold sleeve 301. At the same time, the mold body 401 is fitted and docked with the inner wall surface of the fixed ring 302. After the equalizing mold 4 is completely embedded in the middle mold sleeve 3, only the first pin 5 needs to be screwed into the connecting hole 402 opened on the surface of one side of the mold body 401, and then screwed into the inside of the limit post 303, so that the equalizing mold 4 can be connected and fixed with the equalizing mold 4. By using the above operations, the remaining equalizing molds 4 can be sequentially installed inside the middle mold sleeve 3;

[0028] When all the equalizing molds 4 are assembled and installed, the side of the sub-mold sleeve 301 provided with the docking post 304 is docked with the annular groove 202 on one side of the main core 201, and the main core 201 is embedded in the annular groove 202. At the same time, the docking post 304 is inserted into the docking hole 203 opened on the inner surface of the annular groove 202. Then, the second pin 6 can be screwed into the inside of the mounting hole 205, passed through the docking hole 203, and then screwed into the inside of the docking post 304, so that the middle mold sleeve 3 can be connected and fixed with the mold core 2;

[0029] After that, the side of the main core 201 provided with the fixing hole 204 is inserted into the fixing groove 102 in the middle of the main mold sleeve 101. Then, the fixing post 103 is inserted and docked with the fixing hole 204, so that the entire mold core 2 is completely embedded in the molding die 1. Then, the third pin 7 is screwed into the hole on the back side of the main mold sleeve 101, passed through the fixing post 103 and screwed into the inside of the fixing hole 204, so that the connection and fixation between the molding die 1 and the mold core 2 can be completed. After that, the tooth shape can be processed using the cavity part formed by the equalizing molds 4. During the processing, under the cooperation and protection of the stress sleeve 104 and the strengthening sleeve 105, the extrusion force received by the mold core 2 can be absorbed and dispersed, so as to maximize the protection of its structural integrity and reduce the occurrence of structural fragmentation due to huge forces in the early stage of the processing operation, thereby ensuring the processing quality of the workpiece and the smooth progress of the processing process until the processing is completed.

[0030] The embodiments of the present invention are given for the purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the present invention and its practical applications, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. A split - structure combined cold extrusion forming die, comprising a forming die (1) and an equal - division die (4), characterized in that: Inside the forming die (1), a die core (2) is installed in the middle, and on the middle of the side of the die core (2) away from the forming die (1), a middle die sleeve (3) is installed. The equalizing dies (4) are installed in an annular array inside the middle die sleeve (3). A first pin (5) is connected between the forming die (1) and the die core (2), a second pin (6) is connected between the die core (2) and the middle die sleeve (3), and a third pin (7) is connected between the middle die sleeve (3) and the equalizing dies (4). The equalizing die (4) includes a die body (401), a connection hole (402), and an assembly hole (403). A connection hole (402) is opened on one side of the die body (401), and an assembly hole (403) is opened on the side of the die body (401) away from the connection hole (402).

2. The split-structure combined cold extrusion forming die according to claim 1, characterized in that, The forming die (1) includes a main die sleeve (101), a fixing groove (102), fixing posts (103), a stress sleeve (104), and a strengthening sleeve (105). A fixing groove (102) is opened in the middle of one side of the main die sleeve (101), fixing posts (103) are installed in an annular array inside the fixing groove (102), a stress sleeve (104) is sleeved outside the main die sleeve (101), and a strengthening sleeve (105) is connected to the outside of the stress sleeve (104).

3. The split-structured combined cold extrusion forming die according to claim 2, wherein, The die core (2) includes a main core body (201), an annular groove (202), a docking hole (203), a fixing hole (204), and an installation hole (205). An annular groove (202) is opened on one side of the main core body (201), docking holes (203) are opened in an annular array inside the annular groove (202), and a fixing hole (204) and an installation hole (205) are respectively opened in an annular array on the side of the main core body (201) away from the annular groove (202).

4. A split-structure combined cold extrusion forming die according to claim 3, characterized in that, The middle die sleeve (3) includes a sub-die sleeve (301), a fixing ring (302), a limiting post (303), and a docking post (304). A fixing ring (302) is connected to one side of the sub-die sleeve (301), limiting posts (303) are arranged in an annular array inside the fixing ring (302), and docking posts (304) are arranged in an annular array on the side of the sub-die sleeve (301) away from the limiting posts (303).

5. A split-structured combined cold extrusion forming die according to claim 3, characterized in that, The inner surface structure of the fixing groove (102) matches the outer surface structure of the main core body (201). The outer surface structure of the fixing post (103) matches the inner surface structure of the fixing hole (204). On the side of the main die sleeve (101) away from the fixing groove (102), a hole for installing the third pin (7) is opened and penetrates through the inside of the fixing post (103). The inner wall of the stress sleeve (104) closely adheres to the side surface of the main die sleeve (101), and the side structure of the stress sleeve (104) matches the inner wall structure of the strengthening sleeve (105).

6. The split-structured combined cold extrusion forming die according to claim 4, characterized in that The inner surface structure of the annular groove (202) matches the outer surface structure of the sub-die sleeve (301). The inner surface structure of the fixing ring (302) matches the outer surface structure of the die body (401).

7. A split-structured combined cold extrusion forming die according to claim 4, characterized in that, The external surface structure of the limit pile (303) matches the internal surface structure of the assembly hole (403), and the external surface structure of the docking pile (304) matches the internal surface structure of the docking hole (203).

8. The split-structured combined cold extrusion forming die according to claim 1, wherein The equal - division mold (4) adopts an embedded structure and is arranged in a circular array inside the middle mold sleeve (3). Moreover, the middle mold sleeve (3) is installed on one side surface of the mold core (2) by an embedded structure, and the mold core (2) is installed in the middle of the forming mold (1) by a completely embedded structure.

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