Cold heading device for ball rod

Abstract

The utility model belongs to the technical field of cold heading machines, and particularly relates to a ball head rod cold heading device which comprises an outer cage, a ball head rod cold heading machine, a ball head rod cold heading machine, a ball head rod cold heading machine and a ball head rod cold heading machine. A conical channel is formed in the main body, the main body is arranged in the cavity, and the small end of the conical channel is opposite to the closing opening; the movable mold comprises a first mold body, a second mold body and a clamping piece, the first mold body and the second mold body are both arranged in the conical channel, and a machining area is formed between the first mold body and the second mold body; the driving mechanism comprises an extrusion assembly and a push-out assembly, the extrusion assembly is arranged at the front end of the main body, and the push-out assembly is arranged at the rear end of the main body; wherein the material is connected into a machining area between the first die body and the second die body from the front end of the main body, the extrusion assembly abuts against the end, located at the front end of the main body, of the material, and the push-out assembly penetrates through the closing opening into the cavity and extends into the machining area.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cold header technical field especially relates to a ball head rod cold heading device. BACKGROUND

[0002] Cold Heading Machine is a kind of equipment widely used in metal processing, mainly used to form metal materials (such as steel, copper, aluminum, etc.) by cold working, usually used for producing screws, nuts, rivets, pins and other standard fasteners and other precision metal parts. Cold Heading Machine uses strong mechanical pressure to deform metal parts at room temperature, without heating, by pressing metal materials through die, so as to change shape in cold state.

[0003] The existing cold header is semi-automated in the process of producing products, which often uses artificial loading, but the loading process is subject to the output mode of cold header, and the product is directly placed in the processing area and positioned and processed through the cooperation between the dies, which leads to the situation that the rough casting is easy to be misplaced and the defective product appears, and therefore the ball head rod cold heading device is specially designed. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above-mentioned technical problem, provides a kind of ball head rod cold heading device, reaches the effect of improving product quality.

[0005] Therefore, the utility model provides a kind of ball head rod cold heading device, comprising:

[0006] Outer cage, the cavity is set in outer cage, the opening is set in one end of cavity, and the other end is set to close;

[0007] Main body, the taper channel is set in main body, the main body is set in cavity, and the small end of taper channel is opposite to close;

[0008] Movable die, movable die includes first die body, second die body and clamping piece, first die body and second die body are both set in taper channel, and processing area is formed between first die body and second die body;

[0009] Driving mechanism, driving mechanism includes extrusion assembly and push-out assembly, extrusion assembly is set in the front end of main body, and push-out assembly is set in the rear end of main body;

[0010] Wherein, material is connected to the processing area between first die body and second die body by the front end of main body, extrusion assembly is in the end of the front end of main body and push-out assembly penetrates close and extends to processing area in cavity.

[0011] In the above technical scheme, further, clamping piece includes:

[0012] The first clamping body is disposed at the front end of the first mold body, and a first notch is provided on the front end face of the first mold body for connecting the first clamping body, and a first countersunk hole is provided on the wall of the first notch.

[0013] The second clamping body is disposed at the front end of the second mold body, and a second notch is provided on the front end face of the second mold body for connecting the second clamping body, and a second countersunk hole is provided on the wall of the second notch.

[0014] The first spring is provided on both the first and second countersunk holes, and pushes the first clamping body and the second clamping body outward respectively.

[0015] The first clamping body and the second clamping body are provided with forming grooves corresponding to the processing grooves;

[0016] The first clamping body and the first mold body, as well as the second clamping body and the second mold body, are rotatably connected.

[0017] In the above technical solution, the first clamping body further includes:

[0018] The main body has an arc-shaped cavity.

[0019] The first hinge joint is provided on the body, and the first mold body is provided with a second hinge joint corresponding to the first hinge joint. The first hinge joint and the second hinge joint are connected together by a rotating shaft.

[0020] The second clamping body has the same structure as the first clamping body, and a third hinge joint is provided on the second mold body corresponding to the first hinge joint.

[0021] The first clamping body and the second clamping body cooperate to form the first ball head mold cavity.

[0022] In the above technical solution, the extrusion component further includes:

[0023] The punch has a second ball-shaped mold cavity.

[0024] The power rod is connected at one end to the punch and at the other end to an external drive device.

[0025] Positioning rods are provided, and multiple positioning rods are respectively connected to the first mold body and the second mold body;

[0026] The positioning wing is set on the outer wall of the punch, and the positioning wing is provided with a positioning groove.

[0027] The positioning rod and the positioning groove are in a sliding fit.

[0028] The second ball head cavity and the first ball head cavity work together to form a spherical chamber.

[0029] In the above technical solution, the components further include:

[0030] The base has connection holes at its bottom;

[0031] A boss is located at the bottom of the base, and a connecting hole extends through to the end face of the boss.

[0032] The push rod, with its opening gradually narrowing and connecting hole extending into the cavity;

[0033] The push rod is located at one end on the outside of the outer cage and is connected to the external drive device.

[0034] In the above technical solution, furthermore, the base extends into the conical channel during the cold forging process and abuts against the first mold and the second mold;

[0035] The tapered channel has a buffer channel at its front end.

[0036] Furthermore, the above technical solution also includes:

[0037] The pusher head is located at the end of the push rod, and the front end of the base is provided with a groove corresponding to the pusher head.

[0038] Furthermore, the above technical solution also includes:

[0039] The sliding pad is set on the positioning groove and cooperates with the positioning rod.

[0040] The beneficial effects of this utility model are: it facilitates material feeding, avoids the occurrence of blank displacement due to mechanical vibration, and helps to improve cold heading accuracy and product quality. Attached Figure Description

[0041] Figure 1 This is a structural schematic diagram of one state of this utility model;

[0042] Figure 2 This is a structural schematic diagram of another state of this utility model;

[0043] Figure 3 yes Figure 1 Enlarged view of A in the middle;

[0044] Figure 4 This is a partial structural diagram of the movable mold of this utility model;

[0045] Figure 5 This is a schematic diagram of the punch structure of this utility model;

[0046] The markings in the diagram are as follows: 1. Outer cage; 11. Cavity; 12. Opening; 13. Closure; 2. Main body; 21. Conical channel; 31. First mold body; 311. First notch; 312. First countersunk hole; 313. Second hinge joint; 32. Second mold body; 321. Second notch; 322. Second countersunk hole; 323. Third hinge joint; 33. Clamping component; 331. First clamping body; 3311. Main body; 33111. Arc-shaped cavity; 3312. 332. Hinge joint; 333. Second clamping body; 334. Spring; 41. Extrusion assembly; 411. Punch; 4111. Second ball head die cavity; 412. Power rod; 413. Positioning rod; 414. Positioning wing; 4141. Positioning groove; 42. Ejection assembly; 421. Base; 4211. Connecting hole; 4212. Sink; 422. Boss; 423. Push rod; 5. Machining groove; 6. Forming groove; 7. Buffer channel; 8. Push head; 9. Sliding pad. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0048] Example 1:

[0049] This embodiment provides a ball joint cold heading device, including:

[0050] Outer cage 1, with a cavity 11 inside, one end of the cavity 11 having an opening 12 and the other end having a closing opening 13;

[0051] The main body 2 has a conical channel 21 inside it. The main body 2 is located inside the cavity 11, and the small end of the conical channel 21 is opposite to the constriction 13.

[0052] The movable mold includes a first mold body 31, a second mold body 32 and a clamping member 33. The first mold body 31 and the second mold body 32 are both arranged in the conical channel 21, and processing grooves 5 are provided on the corresponding surfaces between the first mold body 31 and the second mold body 32.

[0053] The driving mechanism includes an extrusion component 41 and an ejection component 42. The extrusion component 41 is located at the front end of the main body 2, and the ejection component 42 is located at the rear end of the main body 2.

[0054] In this process, the material is connected from the front end of the main body 2 to the processing area between the first mold 31 and the second mold 32. The extrusion component 41 abuts against the end of the material at the front end of the main body 2, and the ejection component 42 passes through the closing end 13 into the cavity 11 and extends into the processing area.

[0055] As can be seen from this embodiment, a ball head cold heading device includes an outer cage 1, a main body 2, a movable mold, and a drive mechanism;

[0056] The inner side of the outer cage 1 is formed with a cavity 11. Both ends of the cavity 11 are connected to the outside, and one end with a larger connected area is set as an opening 12, while the other end with a smaller connected area is set as a closing 13.

[0057] The main body 2 is installed into the cavity 11 through the opening 12. The main body 2 is welded and fixed to the outer cage 1. Furthermore, an installation cavity is formed between the main body 2 and the closing opening 13, and the push-out device is set in the installation cavity.

[0058] The movable mold includes a first mold body 31, a second mold body 32, and a clamping member 33. The clamping member 33 is installed at the front end of the first mold body 31 and the second mold body 32. The first mold body 31 and the second mold body 32 are arranged vertically and vertically. Processing grooves 5 are provided on the corresponding surfaces between the first clamping member 331 and the second clamping member 332, and a processing area is formed between the processing grooves 5. The driving mechanism includes an extrusion assembly 41 and an ejection assembly 42. The extrusion assembly 41 is installed at the front end of the main body 2 and is connected to the front end of the first mold body 31 and the second mold body 32. The ejection assembly 42 is installed at the rear end of the main body 2 and cooperates with the rear end of the first mold body 31 and the second mold body 32. The first mold body 31 and the second mold body 32 are both semi-cylinders, and processing grooves 5 are provided on the opposite planar end surfaces of the first mold body 31 and the second mold body 32, and a processing area is formed between the processing grooves 5.

[0059] In use, the movable mold extends out from the opening 12 of the outer cage 1, and an open processing area is formed between the first mold 31 and the second mold 32. The blank is then placed in the processing area at one end of the movable mold extending to the outside of the opening 12. The blank is positioned and clamped by the clamping parts 33 on the first mold 31 and the second mold 32. At this time, the external drive device controls the first mold 31 and the second mold 32 to move along the conical channel 21 through the extrusion assembly 41 installed at the front end of the outer cage 1. As the first mold 31 and the second mold 32 move along the angular direction of the conical channel 21, the processing area gradually shrinks. The first mold 31 and the second mold 32 extrude and shape the blank. After processing, the extrusion assembly 41 is pulled out by the external drive device, and the first mold 31 and the second mold 32 are separated during the pulling process, making the processing area larger. At this time, the external drive device will drive the ejection device at the rear end of the outer cage 1 to push the formed product blank out of the processing area.

[0060] It facilitates material loading and avoids misalignment of blanks due to mechanical vibration, which helps improve cold heading accuracy and product quality.

[0061] Example 2:

[0062] This embodiment provides a ball head cold heading device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] Clamping member 33 includes:

[0064] The first clamping body 331 is disposed at the front end of the first mold body 31, and a first notch 311 is provided on the front end face of the first mold body 31 for connecting the first clamping body 331. A first countersunk hole 312 is provided on the wall of the first notch 311.

[0065] The second clamping body 332 is disposed at the front end of the second mold body 32, and a second notch 321 is provided on the front end face of the second mold body 32 for connecting the second clamping body 332. A second countersunk hole 322 is provided on the wall of the second notch 321.

[0066] The first spring 333 is provided in both the first countersunk hole 312 and the second countersunk hole 322. The first spring 333 is provided in both the first notch 311 and the second notch 321, and pushes the first clamping body 331 and the second clamping body 332 outward respectively.

[0067] Among them, the first clamping body 331 and the second clamping body 332 are provided with forming grooves 6 corresponding to the processing groove 5;

[0068] The first clamping body 331 and the first mold 31, as well as the second clamping body 332 and the second mold 32, are rotatably connected.

[0069] As can be seen from this embodiment, the clamping member 33 includes a first clamping body 331, a second clamping body 332, and a first spring 333;

[0070] A first notch 311 is formed at the port of the machining groove 5 at the front end of the first mold body 31, and a first clamping body 331 is connected thereto; a second notch 321 is formed at the port of the machining groove 5 at the front end of the second mold body 32, and a second clamping body 332 is connected thereto.

[0071] Furthermore, the first clamping body 331 and the second clamping body 332 are provided with forming grooves 6 corresponding to the processing groove 5. The forming grooves 6 have the same cross-sectional shape as the processing groove 5 and are used to cooperate with the blank forming.

[0072] Furthermore, a first countersunk hole 312 is provided on the wall surface of the first notch 311, and a second countersunk hole 322 is provided on the wall surface of the second notch 321. The first spring 333 is provided in both the first countersunk hole 312 and the second countersunk hole 322, and abuts against the first clamping body 331 and the second clamping body 332 respectively.

[0073] The first clamping body 331 is connected to the first mold body 31, and the first clamping body 331 and the first mold body 31 are rotatably connected together in the form of a flip cover. The connection method between the second clamping body 332 and the second mold body 32 is the same as the connection method between the first clamping body and the first mold body 31.

[0074] When the first spring 333 is not under force, it pushes the first clamping body 331 and the second clamping body 332 out of the first notch 311 and the second notch 321. After being pushed out, the first clamping body 331 and the second clamping body 332 flip over and cooperate with each other to form a clamping structure with a constriction 13 to fix the placed blank, thereby achieving the clamping effect.

[0075] Example 3:

[0076] This embodiment provides a ball head cold heading device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0077] The first clamping body 331 includes:

[0078] The main body 3311 has an arc-shaped cavity 33111 on it;

[0079] The first hinge joint 3312 is disposed on the body 3311, and the first mold body 31 is provided with a second hinge joint 313 corresponding to the first hinge joint 3312. The first hinge joint 3312 and the second hinge joint 313 are connected together by a rotating shaft.

[0080] The second clamping body 332 has the same structure as the first clamping body 331, and a third hinge joint 323 is provided on the second mold body 32 corresponding to the first hinge joint 3312.

[0081] The arc-shaped cavities 33111 on the first clamping body 331 and the second clamping body 332 cooperate to form the first ball head mold cavity.

[0082] As can be seen from this embodiment, the first clamping body 331 includes a body 3311 and a first hinge joint 3312;

[0083] The main body 3311 is a quarter circle. A first hinge joint 3312 is integrally welded on one side end face of the main body 3311, and a second hinge joint 313 is formed on the first mold body 31 corresponding to the first hinge joint 3312. The first hinge joint 3312 and the second hinge joint 313 are connected and fitted together by a rotating shaft. The main body 3311 achieves the flipping effect through the hinged fit with the first mold body 31.

[0084] Furthermore, the second clamping body 332 has the same structure as the first clamping body 331, and a third hinge joint 323 is provided on the second mold body 32 corresponding to the first hinge joint 3312 on the second clamping body 332 for connection and cooperation.

[0085] Furthermore, arc-shaped cavities 33111 are provided on the corresponding surfaces of the main bodies 3311 of the first clamping body 331 and the second clamping body 332. The arc-shaped cavities 33111 on the first clamping body 331 and the second clamping body 332 are fitted together to form the first ball head mold cavity, which facilitates the casting of blank ball heads.

[0086] Example 4:

[0087] This embodiment provides a ball head cold heading device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0088] Extrusion assembly 41 includes:

[0089] Punch 411, the punch 411 is provided with a second ball head cavity 4111;

[0090] The power rod 412 is connected at one end to the punch 411 and at the other end to an external drive device.

[0091] Positioning rod 413, multiple positioning rods 413 are provided, and multiple positioning rods 413 are respectively connected to the first mold 31 and the second mold 32;

[0092] Positioning wing 414 is provided on the outer wall of punch 411, and positioning groove 4141 is provided on positioning wing 414.

[0093] The positioning rod 413 and the positioning groove 4141 are in sliding fit;

[0094] The second ball head cavity 4111 cooperates with the first ball head cavity to form a spherical cavity.

[0095] As can be seen from this embodiment, the extrusion assembly 41 includes a punch 411, a power rod 412, a positioning rod 413, and a positioning wing 414;

[0096] A second ball head cavity 4111 is provided on one end face of the punch 411, and a power rod 412 is connected to the other end face of the punch 411. The power rod 412 and the punch 411 are fixed by welding or threaded connection. The punch 411 is provided with a second ball head cavity 4111. By cooperating with the first ball head cavity, a spherical cavity can be formed during the extrusion process.

[0097] One end of the power rod 412 is connected to the punch 411, and the other end is connected to an external drive device, which provides power to drive the punch 411. The driving force transmitted by the power rod 412 enables the punch 411 to perform necessary forward and backward movements, thereby controlling the material flow and forming during the extrusion process;

[0098] The positioning wing 414 is formed on the outer wall of the punch 411, and two sets of positioning wing 414 are symmetrically arranged. The positioning wing 414 is provided with an open positioning groove 4141, which facilitates the connection of the positioning rod 413. The positioning wing 414 corresponds to the first mold 31 and the second mold 32 respectively. The positioning rod 413 is provided on both the first mold 31 and the second mold 32, and corresponds to the positioning wing 414 corresponding to the first mold 31 and the second mold 32 respectively. The positioning rod 413 is slidably connected to the positioning groove 4141 on the positioning wing 414.

[0099] Furthermore, the extrusion assembly 41 is fixed to the external drive device during use, thereby positioning and connecting to the front end of the main body 2, so that the positioning rod 413 will not disengage from the positioning groove 4141 during use.

[0100] In use, the positioning rod 413 connects with the first mold body 31 and the second mold body 32 to ensure proper docking and positioning between the mold bodies, preventing misalignment or deformation of the mold during extrusion. At the same time, the positioning rod 413 can adaptively adjust its position as the power rod 412 pushes the first mold body 31 and the second mold body 32 to move within the conical channel 21, thereby avoiding structural limiting conflicts between the positioning rod 413 and the punch 411 due to the positioning groove 4141.

[0101] Example 5:

[0102] This embodiment provides a ball head cold heading device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0103] Component 42 includes:

[0104] Base 421, with a connecting hole 4211 at the bottom;

[0105] A boss 422 is located at the bottom of the base 421, and a connecting hole 4211 extends through to the end face of the boss 422.

[0106] Push rod 423, push rod 423 extends into cavity 11 through constriction 13 and connecting hole 4211;

[0107] Among them, the push rod 423 is located at one end on the outside of the outer cage 1 and is connected to the external drive device.

[0108] As can be seen from this embodiment, the ejection component 42 includes a base 421, a boss 422, and a push rod 423;

[0109] The base 421 has an integrally formed boss 422 at the bottom, and a connecting hole 4211 is provided on the base 421. The connecting hole 4211 extends through to the end face of the boss 422, and the push rod 423 is connected to the connecting hole 4211.

[0110] The connection between the boss 422 and the constriction 13 can be made by means of fixed welding or movable threaded connection, but not limited to fixed welding or movable threaded connection. The specific implementation depends on individual preferences. The attached figure shows welding as an example.

[0111] In use, the external drive device manipulates the push rod 423 to make radial displacement within the connecting hole 4211, thereby pushing the blank workpiece in the processing area to separate from the first mold body 31 and the second mold body 32.

[0112] Example 6:

[0113] This embodiment provides a ball head cold heading device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0114] During the cold forging process, the base 421 extends into the tapered channel 21 and abuts against the first mold 31 and the second mold 32;

[0115] Among them, a buffer channel 7 is provided at the front end of the tapered channel 21.

[0116] As can be seen from this embodiment, the base 421 can support the first mold 31 and the second mold 32 and close the end of the blank, thereby assisting the first mold 31 and the second mold 32 in forming the blank workpiece.

[0117] On the other side, the tapered channel 21 has a buffer channel 7 formed at the tapered front end to accommodate the base 421.

[0118] Example 7:

[0119] This embodiment provides a ball head cold heading device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0120] Push head 8 is located at the end of push rod 423, and the front end of base 421 is provided with a groove 4212 corresponding to push head 8.

[0121] As can be seen from this embodiment, by setting the push head 8 at the front end of the push rod 423, the contact area between the push rod 423 and the blank workpiece is expanded, thereby facilitating the ejection of the product after cold heading. Furthermore, the front end of the base 421 corresponds to the groove 4212 formed by the push head 8, which facilitates the retraction of the push head 8 during the cold heading process, thereby avoiding the push head 8 from affecting the cold heading process.

[0122] Example 8:

[0123] This embodiment provides a ball head cold heading device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0124] The sliding pad 9 is set on the positioning groove 4141 and cooperates with the positioning rod 413.

[0125] As can be seen from this embodiment, the mating surface between the positioning groove 4141 and the positioning rod 413 is protected by setting a sliding pad 9 on the positioning groove 4141.

[0126] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A ball stud cold heading apparatus characterized by, The utility model relates to a kind of movable die and movable die driving mechanism, including: Outer cage (1), cavity (11) is provided in the outer cage (1), the cavity (11) one end is provided with opening (12), the other end is provided with mouth (13); Main body (2), taper channel (21) is provided in the main body (2), the main body (2) is arranged in cavity (11), and the small end of the taper channel (21) is opposite to mouth (13); Movable die, the movable die includes first die body (31), second die body (32) and clamping piece (33), the first die body (31) and second die body (32) are both arranged in taper channel (21), and the first die body (31) and second die body (32) form processing area between them; Driving mechanism, the driving mechanism includes extrusion assembly (41) and push-out assembly (42), and the extrusion assembly (41) is arranged at the front end of main body (2), and the push-out assembly (42) is arranged at the rear end of main body (2); Wherein, material is connected to the processing area between the first die body (31) and second die body (32) by the front end of main body (2), the extrusion assembly (41) is in contact with the material at the one end of the front end of main body (2), and the push-out assembly (42) penetrates mouth (13) to cavity (11) and extends to processing area.

2. A ball stud cold heading device according to claim 1, characterised in that Clamping piece (33) includes: First clamping body (331), the first clamping body (331) is arranged at the front end of first die body (31), and first notch (311) is arranged on the front end surface of the first die body (31) for connecting first clamping body (331), and first counterbore (312) is arranged on the wall surface of first notch (311); Second clamping body (332), the second clamping body (332) is arranged at the front end of second die body (32), and second notch (321) is arranged on the front end surface of the second die body (32) for connecting second clamping body (332), and second counterbore (322) is arranged on the wall surface of second notch (321); First spring (333), the first spring (333) is arranged on first counterbore (312) and second counterbore (322), and first clamping body (331) and second clamping body (332) are respectively pushed out to the outside; Wherein, the first clamping body (331) and second clamping body (332) are provided with forming groove (6) corresponding to processing groove (5); Wherein, the first clamping body (331) and first die body (31) and the second clamping body (332) and second die body (32) are rotatably connected.

3. A ball stud cold heading apparatus as defined in claim 2 wherein, First clamping body (331) includes: Body (3311), arc cavity (33111) is arranged on the body (3311); First hinged joint (3312), the first hinged joint (3312) is arranged on the body (3311), and the first die body (31) is provided with second hinged joint (313) corresponding to first hinged joint (3312), and the first hinged joint (3312) and second hinged joint (313) are connected together through rotating shaft; The second clamping body (332) is the same in structure as the first clamping body (331), and a third hinge joint (323) is arranged on the second die body (32) corresponding to the first hinge joint (3312); The arc-shaped cavities (33111) on the first clamping body (331) and the second clamping body (332) cooperate to form a first ball head die cavity.

4. A ball stud cold heading apparatus according to claim 3, wherein The extrusion assembly (41) comprises: A punch (411) provided with a second ball head die cavity (4111); A power rod (412) connected to the punch (411) at one end and connected to an external driving device at the other end; A plurality of positioning rods (413) connected to the first die body (31) and the second die body (32) respectively; A positioning wing frame (414) provided on the outer sidewall of the punch (411), and the positioning wing frame (414) is provided with a positioning groove (4141); The positioning rod (413) and the positioning groove (4141) are in sliding fit; The second ball head die cavity (4111) and the first ball head die cavity cooperate to form a spherical cavity.

5. A ball stud cold heading apparatus as defined in claim 4 wherein, The push-out assembly (42) comprises: A base (421) provided with a connecting hole (4211) at the bottom; A boss (422) provided at the bottom of the base (421), and the connecting hole (4211) extends to the end face of the boss (422); A push rod (423) extending into the cavity (11) through the connecting hole (4211) and the neck (13) in sequence; The push rod (423) is connected to an external driving device at one end outside the outer cage (1).

6. A ball stud cold heading apparatus as defined in claim 5 wherein, The base (421) extends into the conical channel (21) during the cold heading process and abuts against the first die body (31) and the second die body (32); The conical channel (21) is provided with a buffer channel (7) at the front end.

7. A ball stud cold heading apparatus as defined in claim 6, further characterized by The push head (8) is provided at the end of the push rod (423), and the front end of the base (421) is provided with a sunken groove (4212) corresponding to the push head (8). The slide pad (9) is provided on the positioning groove (4141) and cooperates with the positioning rod (413).

8. A ball stud cold heading apparatus as defined in claim 7, further characterized by The slide pad (9) is provided on the positioning groove (4141) and cooperates with the positioning rod (413). ​

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