A cold forging forming device and forming process for a locking seat

Abstract

The present invention discloses a cold forging forming device for a locking seat, comprising: a first forming die, a second forming die, a third forming die and a manipulator; the first forming die includes a first forming punch module, a first clamping main module, a first positioning module and a first punch rod; the second forming die includes a second forming punch module, a second forming main module, a second positioning module and a second punch rod; the third forming die includes a third forming punch module, a third forming main module and a third positioning module; the manipulator is respectively arranged between the three forming dies. A cold forging forming process for the locking seat is also disclosed, comprising the following steps: feeding; forming of the clamping block and the positioning hole; forming of the internal teeth; forming of the external teeth and the special-shaped surface; removal of the clamping block. By the above method, the present invention can achieve automatic station conversion; the same positioning module is arranged on different dies, which can effectively ensure the consistency of workpiece positioning on different dies and ensure the forming effect.

Description

Technical Field

[0001] The present invention relates to the field of cold forging forming, and particularly relates to a cold forging forming device and forming process for a locking seat. Background Art

[0002] The locking seat is a component of an automobile seat belt operating mechanism, which locks and protects when the seat belt runs rapidly or the pulling force suddenly increases. The locking seat is a part with a special shape, asymmetry and complex tooth profile, and it includes internal teeth, external teeth and a special-shaped surface, as Figure 1 shown.

[0003] In the traditional forming process of the locking seat, due to the absence of a clamping and positioning block, during the conversion between the forming process steps, it can only be manually transferred and placed, that is, the semi-finished product of the locking seat is manually transferred from the previous forming station to the next station by hand, which greatly reduces the production and processing efficiency. And the traditional die for punching teeth generally meets the requirement of the tooth profile bright belt by heating at a high temperature, and the forming process is complex. Summary of the Invention

[0004] To solve the deficiencies existing in the prior art, the present invention provides a cold forging forming device and forming process for a locking seat.

[0005] A cold forging forming device for a locking seat includes:

[0006] A first forming die, the first forming die includes a first forming punch module, a first clamping main module, a first positioning module and a first punch rod. The first forming punch module is located above the first clamping main module, and a first clamping main die cavity is arranged in the first clamping main module; the first positioning module is located at the bottom of the first clamping main module, the first punch rod passes through the first clamping main module, and an external tooth profile is arranged on the first punch rod;

[0007] A second forming die, the second forming die includes a second forming punch module, a second forming main module and a second positioning module. The second forming punch module is located above the second forming main module, and a second forming main die cavity is arranged in the second forming main module; the second positioning module is located at the bottom of the second forming main module;

[0008] A third forming die, the third forming die includes a third forming punch module, a third forming main module and a third positioning module. The third forming punch module is located above the third forming main module, a third forming main die cavity is arranged in the third forming main module, and a cutting edge is arranged on the side wall of the third forming main die cavity; the third positioning module is located at the bottom of the third forming main module; the sizes of the first positioning module, the second positioning module and the third positioning module are adapted to each other;

[0009] A manipulator, which is respectively arranged between the first forming die and the second forming die and between the second forming die and the third forming die;

[0010] A forming process according to the above lock seat cold forging forming device, comprising the following steps:

[0011] Loading: Place the blank in the first clamping main die cavity of the first clamping main module;

[0012] Forming of the clamping block and the positioning hole: The first forming punch module descends and closes with the first clamping main module, and the clamping block is formed by extruding through the shape of the first clamping main die cavity. The positioning hole is formed at the bottom of the blank through the first positioning module to obtain the first semi-finished product;

[0013] Forming of the internal teeth: The first punch rod rises and extrudes and forms internal teeth in the inner hole of the first semi-finished product to obtain the second semi-finished product;

[0014] Forming of the external teeth and the special-shaped surface: The manipulator places the second semi-finished product in the second forming main die cavity of the second forming main module. The second forming punch module descends and closes with the second forming main module, and the external teeth and the special-shaped surface are formed by extruding on the second semi-finished product through the shape of the second forming main die cavity to obtain the third semi-finished product;

[0015] Removing the clamping block: The manipulator places the third semi-finished product in the third forming main die cavity of the third forming main module. The third forming punch module descends and closes with the third forming main module, and the clamping block on the third semi-finished product is extruded and removed through the shape of the third forming main die cavity to obtain the finished product;

[0016] The above lock seat cold forging forming device completes the transfer of workpieces between different dies through the manipulator, realizing automatic station conversion; the same positioning modules are arranged on different dies, which can effectively ensure the consistency of workpiece positioning on different dies, improve the positioning accuracy, thereby ensuring the forming effect and increasing the yield rate of the formed finished products.

[0017] Preferably, at least two symmetrically arranged planes are provided on the side wall of the first clamping main die cavity.

[0018] Preferably, the first positioning module is symmetrically arranged with the central axis of the first clamping main die cavity as the axis.

[0019] Preferably, the tops of the second positioning module and the third positioning module are set to be conical.

[0020] Preferably, the first forming die, the second forming die and the third forming die all include floating inner punch blocks, and the floating inner punch blocks respectively pass through the first forming die, the second forming die and the third forming die.

[0021] Preferably, the first positioning module passes through the first clamping main module, and the first punch passes through the first positioning module; the second positioning module passes through the second forming main module; the third positioning module passes through the third forming main module.

[0022] Preferably, the third forming die further includes a third punch, the third punch passes through the third forming main module, and an external tooth shape is provided on the third punch.

[0023] Preferably, in the step of forming the external teeth, it is completed in two steps: first step, on the second forming die, the second forming punch module and the second forming main module are closed to first extrude and form external teeth with a height of 1 / 3; second step, on the third forming die, the remaining 2 / 3 height of the external teeth is punched and extruded by the edge of the cutting edge on the third forming main module.

[0024] Preferably, it further includes the removal of the internal tooth waste: the third forming punch module descends and closes with the third forming main module, and the third punch rises in the inner hole of the third semi-finished product to extrude and remove the internal tooth waste in the third semi-finished product.

[0025] In the above cold forging forming process of the locking seat, before forming the workpiece, the clamping block is formed on the blank first, so that the manipulator is more stable when grasping the workpiece, avoiding the rotation of the workpiece during the transfer between different dies, resulting in different positioning of the workpiece on different dies, unable to effectively ensure the forming effect, easily leading to an increase in the defective rate of the formed finished product, and even the appearance of waste products. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the locking seat.

[0027] Figure 2 is a schematic structural diagram of a cold forging forming device for a locking seat according to the present invention.

[0028] Figure 3 is a schematic structural diagram of the first forming die in a cold forging forming device for a locking seat according to the present invention.

[0029] Figure 4 is a schematic structural diagram of the second forming die in a cold forging forming device for a locking seat according to the present invention.

[0030] Figure 5 is a schematic structural diagram of the third forming die in a cold forging forming device for a locking seat according to the present invention.

[0031] Figure 6 is a schematic structural diagram of the blank of the locking seat.

[0032] Figure 7 is a schematic structural diagram of the first semi-finished product of the locking seat.

[0033] Figure 8 It is a schematic structural diagram of the second semi-finished product of the locking seat.

[0034] Figure 9 It is a schematic structural diagram of the third semi-finished product of the locking seat.

[0035] Figure 10 It is Figure 3 The partial enlarged view of part A in

[0036] Figure 11 It is Figure 5 The partial enlarged view of part B in

[0037] Explanation of reference numerals in the drawings:

[0038] 1. Locking seat; 11. Inner teeth; 12. Outer teeth; 13. Special-shaped surface;

[0039] 2. First forming die; 21. First forming punch module; 22. First clamping main module; 23. First positioning module; 24. First punch bar;

[0040] 3. Second forming die; 31. Second forming punch module; 32. Second forming main module; 33. Second positioning module; 34. Second punch bar;

[0041] 4. Third forming die; 41. Third forming punch module; 42. Third forming main module; 421. Edge; 43. Third positioning module; 44. Third punch bar;

[0042] 5. Blank; 6. First semi-finished product; 61. Clamping block; 62. Positioning hole; 7. Second semi-finished product; 8. Third semi-finished product. Detailed implementation manners

[0043] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0044] Referring to the accompanying drawings, a cold forging forming device for a locking seat includes: a first forming die 2, a second forming die 3, a third forming die 4 and a manipulator. The manipulator is respectively arranged between the first forming die 2 and the second forming die 3 and between the second forming die 3 and the third forming die 4. The transfer of workpieces between different dies is completed by the manipulator to achieve automatic station conversion. The manipulator can be selected from conventional manipulators in the prior art.

[0045] The first forming die 2 includes a first forming punch module 21, a first clamping main module 22, a first positioning module 23 and a first punch rod 24. The first forming punch module 21 is located above the first clamping main module 22, and a first clamping main die cavity is arranged in the first clamping main module 22. Since the shapes of the blank 5 and the semi-finished product are both circular, during the forming process, when the manipulator grabs the semi-finished product, the semi-finished product is prone to rotate, affecting the accuracy of workpiece forming at each station. Therefore, at least two symmetrically arranged planes are provided on the side wall of the first clamping main die cavity, so that at least two symmetric outer planes can be formed on the blank 5 in the first clamping main die cavity, and the manipulator directly grabs the outer planes of the semi-finished product to avoid the rotation of the semi-finished product during the station conversion.

[0046] For the accuracy of positioning the semi-finished product in the second forming die 3 and the third forming die 4, the first positioning module 23 is located at the bottom of the first clamping main module 22, and positioning holes 62 are formed at the bottom end of the blank 5 through the first positioning module 23 to facilitate its accurate positioning in the second forming die 3 and the third forming die 4. The first positioning module 23 is symmetrically arranged with the central axis of the first clamping main die cavity as the axis, that is, at least two symmetric positioning holes 62 are provided at the bottom end of the blank 5. The sizes of the first positioning module 23, the second positioning module 33 and the third positioning module 43 are adapted to each other.

[0047] The first punch rod 24 passes through the first clamping main module 22, and external teeth are provided on the first punch rod 24, and internal teeth 11 are extruded in the inner hole of the semi-finished product through the first punch rod 24.

[0048] The first positioning module 23 can be fixedly arranged at the bottom of the first forming main die cavity, or the first positioning module 23 can be movably arranged at the bottom of the first forming main die cavity, that is, the first positioning module 23 passes through the first clamping main module 22, and at this time the first punch rod 24 passes through the first positioning module 23. When the first positioning module 23 passes through the first clamping main module 22, after the forming is completed by the first forming die 2, the first positioning module 23 can be used as a ejector rod to eject the semi-finished product from the first forming main die cavity, facilitating the manipulator to grab.

[0049] The second forming die 3 includes a second forming punch module 31, a second forming main module 32 and a second positioning module 33. The second forming punch module 31 is located above the second forming main module 32, and a second forming main die cavity is arranged in the second forming main module 32. The shape in the second forming main die cavity is the same as the external teeth 12 and the special-shaped surface 13 that the locking seat 1 needs to form, so that the forming of the external teeth 12 and the special-shaped surface 13 on the locking seat 1 can be completed when the second forming punch module 31 and the second forming main module 32 are clamped.

[0050] The second positioning module 33 is located at the bottom of the second main forming module 32. The top end of the second positioning module 33 is conical. When the semi-finished product falls into the second main forming die cavity, the conical second positioning module 33 can play a guiding role, facilitating the accurate insertion of the second positioning module 33 into the positioning hole 62 of the semi-finished product.

[0051] In order to further form the internal teeth 11 of the locking seat 1, the second forming die 3 further includes a second punching rod 34, and the second punching rod 34 passes through the second main forming module 32. Moreover, a horizontally outward supporting force is formed in the inner hole of the locking seat 1 through the second punching rod 34, so as to prevent the semi-finished product from being deformed due to the horizontally inward extrusion force generated by the second main forming module 32 during the forming process by the second forming die 3.

[0052] The second positioning module 33 can be fixedly arranged at the bottom of the second main forming die cavity, or the second positioning module 33 can be movably arranged at the bottom of the second main forming die cavity, that is, the second positioning module 33 passes through the second clamping main module. At this time, the second punching rod 34 passes through the second positioning module 33. When the second positioning module 33 passes through the second clamping main module, after the forming is completed by the second forming die 3, the second positioning module 33 can be used as an ejector rod to eject the semi-finished product from the second main forming die cavity, facilitating the grabbing by the manipulator.

[0053] The third forming die 4 includes a third forming punching module 41, a third main forming module 42, and a third positioning module 43. The third forming punching module 41 is located above the third main forming module 42, and a third main forming die cavity is arranged in the third main forming module 42. The shape in the third main forming die cavity is the same as the outer shape of the finished locking seat 1, that is, the shape of the third main forming die cavity is the same as the shape of the outer teeth 12 and the special-shaped surface 13 of the locking seat 1. In this way, when the third forming punching module 41 and the third main forming module 42 are clamped, the clamping block 61 can be removed to complete the forming of the outer shape of the finished locking seat 1.

[0054] A cutting edge 421 is arranged on the side wall of the third main forming die cavity, and the cutting edge 421 is inclined, that is, the contact surface of the cutting edge 421 with the blank 5 is an inclined surface. In this way, when the third main forming die cavity performs forming processing on the semi-finished product, the semi-finished product can be punched, and since the cutting edge 421 is inclined, the third main forming die cavity also extrudes the semi-finished product inward while punching, achieving the effect of punching and extruding simultaneously. Through the setting of the cutting edge 421, the outer tooth forming can be completed without heating at normal temperature and without leaving a tearing trace, which can meet the requirements of the tooth-shaped bright band. Changing the heated punching die to a normal-temperature punching die with semi-punching and semi-extrusion simplifies the process steps and can complete the operation at normal temperature.

[0055] When the height of the external teeth 12 of the locking seat 1 is higher than a certain value (such as 5 cm), forming the external teeth 12 in one step through the second forming die 3 is likely to leave tearing marks on the locking seat 1, affecting the forming effect. To avoid generating tearing marks, the forming of the external teeth can be divided into two steps. In the first step, the external teeth 12 with a partial height are formed through the second forming die 3, and in the second step, the external teeth 12 with the remaining height are formed through the third forming die 4.

[0056] Since the shape in the third forming main die cavity is the same as the outer shape of the finished locking seat 1, that is, the side wall of the third forming main die cavity is internal teeth and is adapted to the external teeth 12 of the locking seat 1. During the process of the third forming punch module 41 and the third forming main module 42 being closed, the external teeth 12 with the remaining height are extruded while being punched by the cutting edge 421 on the third forming punch module 41.

[0057] The internal teeth 11 of the locking seat 1 can be formed in the first forming die 2. Since the locking seat 1 has a certain height, the waste generated during the forming of the internal teeth may not be completely removed in the first forming die 2. To be able to completely remove the waste generated during the forming of the internal teeth, the third forming die 4 further includes a third punch rod 44. The third punch rod 44 passes through the third forming main module 42, and an external tooth shape is provided on the third punch rod 44, which is adapted to the external tooth shape on the first punch rod 24. In this way, through the extrusion of the third punch rod 44, the internal tooth waste can be completely removed from the locking seat 1 without affecting the internal teeth 11 of the locking seat 1. Moreover, a horizontally outward supporting force is formed in the inner hole of the locking seat 1 through the third punch rod 44, and during the forming process through the third forming die 4, it is possible to avoid the semi-finished product being deformed due to the horizontally inward extrusion force generated by the third forming main module 42 on the semi-finished product.

[0058] The third positioning module 43 is located at the bottom of the third forming main module 42, and the third punch rod 44 passes through the third forming main module 42. The top end of the third positioning module 43 is set to be conical. When the semi-finished product drops into the third forming main die cavity, the conical third positioning module 43 can play a guiding role, facilitating the third positioning module 43 to accurately insert into the positioning hole 62 of the semi-finished product.

[0059] The third positioning module 43 can be fixedly arranged at the bottom of the third forming main die cavity, or the third positioning module 43 can also be movably arranged at the bottom of the third forming main die cavity, that is, the third positioning module 43 passes through the third clamping main module. At this time, the third punch rod 44 passes through the third positioning module 43. When the third positioning module 43 passes through the third clamping main module, after the forming is completed through the third forming die 4, the third positioning module 43 can be used as a push rod to eject the semi-finished product from the third forming main die cavity, facilitating the robot to grab.

[0060] A forming process according to the above cold forging forming device of the locking seat 1 includes the following steps:

[0061] Loading: Place the cylindrical blank 5 in the first clamping main die cavity of the first clamping main module 22.

[0062] Forming of the clamping block 61 and the positioning hole 62: The first forming punch module 21 and the floating inner punch block descend, and extrude and fill the blank 5 in the first clamping main die cavity. During the filling process, the clamping block 61 is formed by extrusion through the shape of the first clamping main die cavity. The filled workpiece is in full contact with the first positioning module 23, and the positioning hole 62 is formed at the bottom of the blank 5 through the first positioning module 23 to obtain the first semi-finished product 6.

[0063] According to the characteristics of the locking seat 1 workpiece, without increasing the raw materials, first form the clamping block 61 as the clamping and positioning reference for the subsequent forming process steps, convert the asymmetric workpiece into a structure with a symmetric upper end face and an asymmetric lower end face, and the manipulator clamps the upper end face (clamping block) and transfers it to the next station, achieving non-rotation during transfer and improving the accuracy of the tooth-lifting type entering the mold.

[0064] Forming of the internal teeth 11: The first punch rod 24 rises and is in full contact with the first semi-finished product 6, and the internal teeth are extruded and formed in the inner hole of the first semi-finished product 6 to obtain the second semi-finished product 7. The first positioning module 23 rises to eject the second semi-finished product 7 out of the first clamping main die cavity.

[0065] Forming of the external teeth 12 and the special-shaped surface 13: The manipulator takes the second semi-finished product 7 from the first forming die 2 and places it in the second clamping main die cavity of the second forming main module 32. The second positioning module 33 rises to catch the second semi-finished product 7. The second forming punch module 31 and the floating inner punch block descend, and the inner hole of the second semi-finished product 7 is accurately sleeved on the second punch rod 34 to continue extruding and forming the internal teeth.

[0066] The second forming punch module 31 descends and closes the mold with the second forming main module 32, and the external teeth 12 and the special-shaped surface 13 are formed by extrusion on the second semi-finished product 7 through the shape of the second clamping main die cavity to obtain the third semi-finished product 8.

[0067] In the step of forming the external teeth, the forming of the external teeth can be completed in two steps: First step, first extrude and form the external teeth 12 with a height of 1 / 3 through the closing of the second forming punch module 31 and the second forming main module 32 on the second forming die 3; Second step, on the third forming die 4, the remaining 2 / 3 height of the external teeth 12 is punched and extruded while cutting by the edge 421 on the third forming main module 42.

[0068] Removal of internal tooth waste: The manipulator takes the third semi-finished product 8 from the second forming die 3 and places it in the third forming main die cavity of the third forming main module 42. The third positioning module 43 rises to catch the third semi-finished product 8. The third forming punch module 41 and the floating internal punch block descend to accurately fit the inner hole of the third semi-finished product 8 onto the third punch rod 44. The third forming punch module 41 descends to close the mold with the third forming main module 42. The third punch rod 44 rises inside the inner hole of the third semi-finished product 8 to extrude and remove the internal tooth waste inside the third semi-finished product 8.

[0069] Removal of the clamping block 61: The third forming punch module 41 descends to close the mold with the third forming main module 42, and the clamping block 61 on the third semi-finished product 8 is extruded and removed through the shape of the third forming main die cavity to obtain the finished product.

[0070] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A cold forging forming device for a locking seat, characterized in that, Including: The first forming die, which includes a first forming punch module, a first clamping main module, a first positioning module and a first punch rod. The first forming punch module is located above the first clamping main module, and a first clamping main die cavity is arranged inside the first clamping main module; the first positioning module is located at the bottom of the first clamping main module, the first punch rod passes through the first clamping main module, and external teeth are arranged on the first punch rod; The second forming die, which includes a second forming punch module, a second forming main module and a second positioning module. The second forming punch module is located above the second forming main module, and a second forming main die cavity is arranged inside the second forming main module; the second positioning module is located at the bottom of the second forming main module; The third forming die, which includes a third forming punch module, a third forming main module and a third positioning module. The third forming punch module is located above the third forming main module, a third forming main die cavity is arranged inside the third forming main module, and a cutting edge is arranged on the side wall of the third forming main die cavity; the third positioning module is located at the bottom of the third forming main module; the sizes of the first positioning module, the second positioning module and the third positioning module are adapted to each other; A manipulator, which is respectively arranged between the first forming die and the second forming die and between the second forming die and the third forming die; The forming process of the above lock seat cold forging forming device includes the following steps: Loading: Place the blank in the first clamping main die cavity of the first clamping main module; Forming of the clamping block and the positioning hole: The first forming punch module descends to close the mold with the first clamping main module, and the clamping block is formed by extruding through the shape of the first clamping main die cavity. The positioning hole is formed at the bottom of the blank through the first positioning module to obtain the first semi-finished product; Forming of the internal teeth: The first punch rod rises to extrude and form internal teeth in the inner hole of the first semi-finished product to obtain the second semi-finished product; Forming of the external teeth and the special-shaped surface: The manipulator places the second semi-finished product in the second forming main die cavity of the second forming main module. The second forming punch module descends to close the mold with the second forming main module, and the external teeth and the special-shaped surface are formed by extruding on the second semi-finished product through the shape of the second forming main die cavity to obtain the third semi-finished product; Removing the clamping block: The manipulator places the third semi-finished product in the third forming main die cavity of the third forming main module. The third forming punch module descends to close the mold with the third forming main module, and the clamping block on the third semi-finished product is extruded and removed through the shape of the third forming main die cavity to obtain the finished product.

2. The cold forging forming device of a locking seat according to claim 1, characterized in that: At least two symmetrically arranged planes are arranged on the side wall of the first clamping main die cavity.

3. A cold forging forming device for a locking seat according to claim 1, characterized in that: The first positioning module is symmetrically arranged with the central axis of the first clamping main die cavity as the axis.

4. A cold forging forming device for a locking seat according to claim 1, characterized in that: The tops of the second positioning module and the third positioning module are set to be conical.

5. A cold forging forming device for a locking seat according to claim 1, characterized in that: The first forming die, the second forming die and the third forming die all include floating inner punch blocks, and the floating inner punch blocks respectively pass through the first forming die, the second forming die and the third forming die.

6. The cold forging forming device of a locking seat according to claim 1, characterized in that: The first positioning module passes through the first clamping main module, and the first punching rod passes through the first positioning module; the second positioning module passes through the second forming main module; the third positioning module passes through the third forming main module.

7. A cold forging forming device for a locking seat according to claim 1, characterized in that: The third forming die further includes a third punching rod which passes through the third forming main module, and an external tooth shape is arranged on the third punching rod.

8. A cold forging forming device for a locking seat according to claim 1, characterized in that: In the step of forming the external teeth, it is completed in two steps: First, on the second forming die, the second forming punch module and the second forming main module are closed to first extrude and form external teeth with a height of 1 / 3; Second, on the third forming die, the remaining external teeth with a height of 2 / 3 are extruded while punching by the edge of the cutting edge on the third forming main module.

9. A cold forging forming device for a locking seat according to claim 1, characterized in that: It also includes the removal of the internal tooth waste: The third forming punch module descends and closes with the third forming main module, and the third punching rod rises in the inner hole of the third semi-finished product to extrude and remove the internal tooth waste in the third semi-finished product.

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