Composite cold heading die

Abstract

The utility model relates to the technical field of cold heading dies, in particular to a composite cold heading die which comprises a lower die, an upper die and a composite assembly, the upper die is installed on the upper surface of the lower die, an installation cavity is formed in the joint of the upper die and the lower die, and the composite assembly is arranged on the inner wall of the installation cavity. And the composite assembly comprises an assembling unit, the assembling unit comprises a mold core body, the mold core body is installed on the inner wall of the installation cavity, the side surface of the lower mold and the side surface of the upper mold are each provided with a containing groove, the outer circumference of the mold core body is connected with an arc-shaped baffle, and the arc-shaped baffles are connected with the inner walls of the containing grooves in an inserted mode. According to the utility model, through the arrangement of the composite assembly, the molding structure is convenient to disassemble or assemble by a worker, so that the problem that the replacement operation is inconvenient due to the fact that the mold main body needs to be disassembled when the worker performs the disassembly and assembly operation of the molding structure is reduced, and the replacement efficiency of the molding structure of the mold is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading dies, in particular to a composite cold heading die. Background Art

[0002] The composite cold heading die is an important tool in the cold heading process. It is composed of a variety of materials and components, integrating the characteristics of different materials to achieve better performance. This kind of die usually has a high-strength core part to withstand the huge pressure and impact force during the cold heading process, and at the same time has good wear resistance and can maintain accuracy during frequent use. The design of the composite cold heading die is delicate, and each component cooperates with each other to precisely shape the metal material. In practical applications, it is widely used in manufacturing various parts with complex shapes and high-precision requirements, such as automotive parts, mechanical fasteners, etc. Compared with traditional dies, it can improve production efficiency and ensure the stability and consistency of product quality.

[0003] The prior art such as the utility model with the publication number of CN207592701U discloses a composite cold heading die. This patent uses a cold heading punch and multiple die units. Each of the multiple die units is provided with a forming groove, and the multiple forming grooves enclose a forming hole. The die unit includes a base die and a forming die. The forming groove is arranged on the forming die, and the forming die is clamped on the base die. The base die is used to connect to the cold heading machine. For this composite cold heading die, by splitting a die unit into a base die and a forming die that are clamped and fixed to each other, after the forming die provided with the forming groove is damaged, only the forming die needs to be removed from the corresponding base die and replaced. Since this composite cold heading die does not need to replace the entire die unit, the use and maintenance costs are reduced. In addition, when high-pressure oil pipes with different structural dimensions need to be produced, only forming dies with different specifications need to be replaced, making this composite cold heading die universal and greatly reducing the die production cost, solving the problem that in the actual application of existing dies, the shaping work is mostly carried out through the forming grooves directly opened on the die body, and the forming grooves are prone to damage during continuous cold heading production. At this time, the entire die unit to which the forming groove belongs needs to be removed from the cold heading machine and replaced, thus increasing the replacement cost.

[0004] In the process of using a composite cold heading die to replace a conventional cold heading die, there are existing composite cold heading dies such as the above. In order to reduce the die replacement cost, the shaping structure is designed to be detachable. However, in the actual replacement process, due to the protruding parts of the shaping structure, when the staff performs the disassembly operation, blocked by the protruding parts, the upper die needs to be removed first before the shaping structure can be replaced. In view of the fact that the disassembly operation of the die is relatively complex, the replacement efficiency of the shaping structure is restricted by the disassembly difficulty of the die, bringing inconvenience to the staff to replace the shaping structure. Summary of the Utility Model

[0005] The object of the present utility model is to solve the disadvantages existing in the prior art that in view of the relatively complex disassembly operation of the mold, the replacement efficiency of the shaping structure is restricted by the difficulty of mold disassembly, which brings inconvenience to the staff in replacing the shaping structure, and a composite cold heading mold is proposed.

[0006] To achieve the above object, the present utility model adopts the following technical scheme: A composite cold heading mold, including a lower mold, an upper mold and a composite component, the upper mold is installed on the upper surface of the lower mold, an installation cavity is opened at the connection between the upper mold and the lower mold, and the composite component is arranged on the inner wall of the installation cavity;

[0007] The composite component includes an assembly unit, the assembly unit includes a die core main body, the die core main body is installed on the inner wall of the installation cavity, receiving grooves are opened on the side surfaces of both the lower mold and the upper mold, an arc-shaped baffle is connected to the outer circumference of the die core main body, the arc-shaped baffle is inserted into the inner wall of the receiving groove, positioning holes are opened on the side surface of the arc-shaped baffle, and limiting pins are connected to the inner walls of the receiving grooves of both the lower mold and the upper mold, and the limiting pins are inserted into the inner walls of the positioning holes;

[0008] The composite component further includes a limiting unit, the limiting unit includes two assembly frames symmetrically arranged up and down, the two assembly frames are respectively connected to the side surfaces of the lower mold and the upper mold, a fixing bolt is inserted into the inner wall of the assembly frame, a threaded groove is opened on the side surface of the die core main body, the fixing bolt is threadedly connected to the inner wall of the threaded groove, an inner hexagonal head is connected to the side surface of the fixing bolt, a restraint ring is connected to the side surface of the assembly frame, and a guiding ring is rotatably connected to the inner wall of the restraint ring, and the guiding ring is sleeved on the surface of the fixing bolt.

[0009] Preferably, an anti-slip gasket is arranged on the side surface of the guiding ring, the anti-slip gasket is sleeved on the surface of the fixing bolt, and a sliding groove is opened on the surface of the fixing bolt. By installing the anti-slip gasket on the side of the guiding ring, the friction force of the inner hexagonal head in the tightened state can be increased to reduce the problem that the fixing bolt loosens due to the vibration interference during the use of the inner hexagonal head.

[0010] Preferably, the number of the die core main bodies is two, the two die core main bodies are symmetrically arranged up and down with respect to the lower mold, and the number of the arc-shaped baffles matches that of the die core main bodies. By installing the arc-shaped baffles on the outer circumference of the die core main bodies, the installation positions of the die core main bodies can be preliminarily limited, so as to facilitate the subsequent installation operation of the staff.

[0011] Preferably, the number of the limit pins is four, and the four limit pins are arranged in a circumferential array with respect to the die core body. The limit pins can assist the arc-shaped baffle to restrict the position of the die core body, so as to ensure the stability of the die core body during installation and the firmness of the die core body after installation.

[0012] Preferably, the fixing bolts penetrate through the side surface of the assembly frame. The number of the fixing bolts is four, and the four fixing bolts are arranged in a circumferential array with respect to the assembly frame. By means of the fixing bolts installed in the assembly frame, the position of the die core body can be defined in cooperation with the internal hexagonal head and the thread groove, so as to ensure that the die core body can be firmly installed in the installation areas of the upper die and the lower die.

[0013] Preferably, the inner wall of the guiding ring is connected with four protruding parts arranged in a circumferential array. The protruding parts of the guiding ring are slidably connected with the inner wall of the sliding groove. The number of the sliding grooves matches that of the protruding parts. Through the cooperation between the protruding parts inside the guiding ring and the sliding grooves, the maximum moving distance of the fixing bolts can be restricted, and at the same time, the positions of the fixing bolts can be constrained within the assembly frame, which is convenient for the staff to install.

[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0015] In the present utility model, when it is necessary to replace the die core body by setting the auxiliary component, rotate a single internal hexagonal head counterclockwise. The internal hexagonal head rotates the fixing bolt, and the fixing bolt gradually screws out of the thread groove during rotation. When the fixing bolt completely disengages from the thread groove, screw out the remaining fixing bolts according to the above operation. When all the fixing bolts are screwed out of the thread groove, the die core body loses the restriction of the fixing bolts, and then push the die core body in the direction of the arc-shaped baffle. The die core body applies force to push the arc-shaped baffle, and the arc-shaped baffle is pushed to disengage from the limit pins and the receiving groove. When the arc-shaped baffle moves out of the receiving groove, operate the arc-shaped baffle to completely remove the die core body. When the die core body is completely removed, a new die core body can be installed into the lower die and the upper die. By setting the composite component, it is convenient for the staff to disassemble or install the shaping structure, thereby reducing the problem that when the staff disassemble and install the shaping structure, they also need to disassemble the die body, resulting in inconvenient replacement operation, and further improving the replacement efficiency of the die shaping structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of a composite cold heading die proposed by the present utility model;

[0017] Figure 2 is a rear-view structural schematic diagram of a composite cold heading die proposed by the present utility model;

[0018] Figure 3This utility model provides a partial structural schematic diagram of a composite cold heading die;

[0019] Figure 4 This utility model provides a structural schematic diagram of an auxiliary component of a composite cold heading die;

[0020] Figure 5 This utility model provides a Figure 3 structural schematic diagram of part A in a composite cold heading die;

[0021] Figure 6 This utility model provides a partial structural schematic diagram of an auxiliary component of a composite cold heading die.

[0022] Legend:

[0023] 1. Lower die; 2. Upper die; 3. Composite component; 31. Assembly unit; 311. Die core body; 312. Receiving groove; 313. Arc-shaped baffle; 314. Positioning hole; 315. Limit pin; 32. Limiting unit; 321. Assembly frame; 322. Fixed bolt; 323. Thread groove; 324. Hexagon socket head; 325. Constraint ring; 326. Guide ring; 327. Anti-slip gasket; 328. Slide groove. Detailed implementation

[0024] Please refer to Figures 1-6 , this utility model provides a technical solution: a composite cold heading die, including a lower die 1, an upper die 2 and a composite component 3. The upper die 2 is installed on the upper surface of the lower die 1. An installation cavity is opened at the connection between the upper die 2 and the lower die 1. The composite component 3 is arranged on the inner wall of the installation cavity.

[0025] In this implementation: The composite component 3 includes an assembly unit 31. The assembly unit 31 includes a die core body 311. The die core body 311 is installed on the inner wall of the installation cavity. Receiving grooves 312 are opened on the side surfaces of both the lower die 1 and the upper die 2. An arc-shaped baffle 313 is connected to the outer circumference of the die core body 311. The arc-shaped baffle 313 is inserted into the inner wall of the receiving groove 312. A positioning hole 314 is opened on the side surface of the arc-shaped baffle 313. Limit pins 315 are connected to the inner walls of the receiving grooves 312 of both the lower die 1 and the upper die 2. The limit pins 315 are inserted into the inner wall of the positioning hole 314;

[0026] The composite component 3 further includes a limiting unit 32. The limiting unit 32 includes two assembly frames 321 arranged symmetrically up and down. The two assembly frames 321 are respectively connected to the side surfaces of the lower mold 1 and the upper mold 2. A fixing bolt 322 is inserted into the inner wall of the assembly frame 321. A threaded groove 323 is formed on the side surface of the mold core body 311. The fixing bolt 322 is threadedly connected to the inner wall of the threaded groove 323. An internal hexagonal head 324 is connected to the side surface of the fixing bolt 322. A restraint ring 325 is connected to the side surface of the assembly frame 321. A guiding ring 326 is rotatably connected to the inner wall of the restraint ring 325. The guiding ring 326 is sleeved on the surface of the fixing bolt 322.

[0027] Specifically, an anti-slip gasket 327 is provided on the side surface of the guiding ring 326. The anti-slip gasket 327 is sleeved on the surface of the fixing bolt 322. A sliding groove 328 is formed on the surface of the fixing bolt 322. By means of the anti-slip gasket 327 installed on the side of the guiding ring 326, the friction of the internal hexagonal head 324 in the tightened state can be increased, so as to reduce the problem that the fixing bolt 322 becomes loose due to the vibration interference received by the internal hexagonal head 324 during use.

[0028] Specifically, the number of the mold core bodies 311 is two. The two mold core bodies 311 are arranged symmetrically up and down with respect to the lower mold 1. The arc-shaped baffle 313 is matched with the number of the mold core bodies 311.

[0029] In this embodiment: Through the arc-shaped baffle 313 installed on the outer circumference of the mold core body 311, the installation position of the mold core body 311 can be preliminarily restricted, so as to facilitate the subsequent installation operation by the staff.

[0030] Specifically, the number of the limit pins 315 is four. The four limit pins 315 are arranged in a circumferential array with respect to the mold core body 311. The limit pins 315 can assist the arc-shaped baffle 313 to restrict the position of the mold core body 311, so as to ensure the stability of the mold core body 311 during installation and ensure the firmness of the mold core body 311 after installation.

[0031] In this embodiment: The fixing bolt 322 penetrates through the side surface of the assembly frame 321. The number of the fixing bolts 322 is four. The four fixing bolts 322 are arranged in a circumferential array with respect to the assembly frame 321.

[0032] In this embodiment: Through the fixing bolt 322 installed in the assembly frame 321, the position of the mold core body 311 can be limited in cooperation with the internal hexagonal head 324 and the threaded groove 323, so as to ensure that the mold core body 311 can be firmly installed in the installation area of the upper mold 2 and the lower mold 1.

[0033] Specifically, four protruding portions arranged in a circumferential array are connected to the inner wall of the guiding ring 326. The protruding portions of the guiding ring 326 are slidably connected to the inner wall of the sliding groove 328. The number of sliding grooves 328 matches that of the protruding portions. Through the cooperation between the protruding portions inside the guiding ring 326 and the sliding grooves 328, the maximum moving distance of the fixing bolt 322 can be restricted, and at the same time, the position of the fixing bolt 322 can be constrained within the assembly frame 321, facilitating installation by the staff.

[0034] Working principle: When the mold core main body 311 needs to be replaced, rotate the single hexagon socket head 324 counterclockwise. The hexagon socket head 324 rotates the fixing bolt 322. During the rotation of the fixing bolt 322, it gradually unscrews from the thread groove 323. When the fixing bolt 322 completely disengages from the thread groove 323, screw out the remaining fixing bolts 322 from the thread groove 323 according to the above operation. When all the fixing bolts 322 are screwed out of the thread groove 323, the mold core main body 311 loses the restriction of the fixing bolts 322, and then push the mold core main body 311 in the direction of the arc-shaped baffle 313. The mold core main body 311 forces the arc-shaped baffle 313, and the arc-shaped baffle 313 is pushed to disengage from the limit pin 315 and the receiving groove 312. When the arc-shaped baffle 313 is moved out of the receiving groove 312, operate the arc-shaped baffle 313 to completely remove the mold core main body 311. When the mold core main body 311 is completely removed, a new mold core main body 311 can be installed into the lower mold 1 and the upper mold 2.

Claims

1. A composite cold heading die, comprising a lower die (1), an upper die (2) and a composite component (3), characterized in that: The upper mold (2) is mounted on the upper surface of the lower mold (1); a mounting cavity is provided at the junction of the upper mold (2) and the lower mold (1); and the composite component (3) is arranged on the inner wall of the mounting cavity; The composite component (3) comprises an assembly unit (31), the assembly unit (31) comprises a core body (311), the core body (311) is mounted on the inner wall of the mounting cavity, the side surfaces of the lower mold (1) and the upper mold (2) are both provided with a receiving groove (312), the outer circumference of the core body (311) is connected with an arc-shaped baffle (313), the arc-shaped baffle (313) is plugged into the inner wall of the receiving groove (312), the side surface of the arc-shaped baffle (313) is provided with a positioning hole (314), the inner walls of the lower mold (1) and the upper mold (2) located in the receiving groove (312) are both connected with a limiting bayonet (315), and the limiting bayonet (315) is plugged into the inner wall of the positioning hole (314); The composite component (3) further comprises a limiting unit (32), wherein the limiting unit (32) comprises two assembly frames (321) symmetrically arranged in an upper and lower direction, wherein the two assembly frames (321) are respectively connected to the side surfaces of the lower mold (1) and the upper mold (2), wherein a fixing bolt (322) is inserted into the inner wall of the assembly frame (321), wherein a thread groove (323) is provided on the side surface of the mold core body (311), wherein the fixing bolt (322) is threadedly connected to the inner wall of the thread groove (323), wherein the side surface of the fixing bolt (322) is connected to a hexagonal head (324), wherein the side surface of the fixing bolt (322) is connected to a restraining ring (325), wherein the inner wall of the restraining ring (325) is rotatably connected to a guide ring (326), wherein the guide ring (326) is sleeved with the surface of the fixing bolt (322).

2. A composite cold heading die according to claim 1, characterized in that: The side surface of the guide ring (326) is provided with an anti-skid pad (327), and the anti-skid pad (327) is sleeved with the surface of the fixing bolt (322), and the surface of the fixing bolt (322) is provided with a sliding groove (328).

3. A composite cold heading die according to claim 1, characterized in that: The number of the core bodies (311) is two, and the two core bodies (311) are symmetrically arranged with respect to the lower mold (1) in an upper and lower direction, and the number of the arc-shaped baffles (313) matches that of the core bodies (311).

4. The composite cold heading die according to claim 1, characterized in that: The number of the limiting latches (315) is four, and the four limiting latches (315) are arranged in a circular array with respect to the mold core body (311).

5. The composite cold heading die according to claim 1, characterized in that: The fixing bolts (322) penetrate the side surface of the assembly rack (321), the number of the fixing bolts (322) is four, and the four fixing bolts (322) are arranged in a circular array with respect to the assembly rack (321).

6. The composite cold heading die according to claim 1, characterized in that: The inner wall of the guide ring (326) is connected to four protrusions arranged in a circular array, and the protrusions of the guide ring (326) are slidably connected to the inner wall of the slide groove (328), and the number of the slide groove (328) matches the protrusions.

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