Cold header for steel ball machining

Abstract

The invention relates to the technical field of cold heading machining, in particular to a cold heading machine for steel ball machining, which comprises a machining machine table, an extrusion structure, a female die structure and an ejection structure are mounted on the machining machine table, a first telescopic cylinder stretches and retracts in the extrusion structure to drive an ejection die to move, and the female die structure comprises two groups of side female dies; the two sets of side female dies are installed on the second installation plate in a sliding mode, self-locking assemblies are installed at the close ends of the two sets of side female dies, the ejection structure comprises a bottom supporting die, an ejection rod, a screw assembly and a cleaning sleeve, the ejection rod and the bottom supporting die are driven to move in an ejection mode through the screw assembly, and meanwhile the cleaning sleeve is rotationally installed at the outer end of the ejection rod. The screw assembly drives the ejector rod to move and drives the cleaning sleeve to rotate synchronously at the same time, so that the inner walls of the two sets of side female dies are cleaned in the steel ball cold heading discharging process, it is avoided that when steel balls are subjected to cold heading extrusion of the female dies, tiny chippings generated by breaking of the edge parts of the steel balls are left in the female dies, and the service life of the steel balls is prolonged. And the subsequent cold heading machining quality of the steel balls is influenced.

Description

Technical Field

[0001] The invention relates to the technical field of cold heading processing, in particular to a cold heading machine for processing steel balls. Background Art

[0002] The cold heading process utilizes the plastic deformation of metal under the action of external force, and uses a mold to redistribute and transfer the metal volume to form the required parts or blanks. It is often used to manufacture parts such as bolts, nuts, nails, rivets and steel balls.

[0003] During the production process of steel balls in a cold heading machine, after the punching device extrude and shape the raw material bar placed in the cold heading die, it is usually necessary to push it out of the die through an ejector device. The die is often designed as an integral whole, and the processing port for inserting the punching device is also the discharge port for discharging the completed steel balls.

[0004] Although the above-mentioned cold heading machine can complete the processing of steel balls, the edges of the raw material bars of the actual steel balls are often broken due to extrusion during the cold heading extrusion of the die, resulting in fine debris. These debris often cannot be discharged synchronously with the discharge of the steel balls during the cold heading process, thereby affecting the cold heading processing quality of the next group of steel balls. Summary of the Invention

[0005] The object of the present invention is to provide a cold heading machine for processing steel balls, so as to solve the above-mentioned technical problems.

[0006] To achieve the above-mentioned object, the present invention provides a cold heading machine for processing steel balls, comprising a processing machine platform, an extrusion structure, a die structure and an ejection structure;

[0007] Wherein, the processing machine includes a first mounting plate and a second mounting plate;

[0008] The extrusion structure includes a first telescopic cylinder and a top pressing die, wherein the first telescopic cylinder is fixedly mounted in a mounting hole provided on the first mounting plate, and the top pressing die is fixedly mounted on the extrusion end of the first telescopic cylinder;

[0009] The die structure includes two sets of side dies, which are slidably mounted on a second mounting plate and driven by a power assembly on the second mounting plate to move in mirror image. The proximal ends of the two sets of side dies are equipped with self-locking assemblies for locking when they are in close contact. A ball push assembly is slidably mounted inside the side dies, and the ball push assembly is used to abut and disengage a steel ball embedded in the inner wall of the side dies when the mirror images of the two sets of side dies are separated.

[0010] The ejection structure includes a bottom supporting mold, an ejector rod, a screw assembly and a cleaning sleeve. The bottom supporting mold is fixedly installed at the bottom of the ejector rod. The near ends of the two sets of side concave molds are provided with a clearance opening for inserting the bottom supporting mold. The screw assembly is fixedly installed on the rear side of the second mounting plate, which is used to drive the ejector rod to eject linearly. The cleaning sleeve is rotatably installed on the outer end of the ejector rod and is connected to the screw assembly through the first transmission assembly. The screw assembly drives the cleaning sleeve to rotate synchronously.

[0011] As a further solution of the present invention, the two groups of side concave molds are fixedly mounted on corresponding guide sliders, and the second mounting plate is provided with guide rails for the corresponding guide sliders to be slidably mounted on.

[0012] As a further solution of the present invention, the ball pushing assembly is installed in a placement cavity provided inside the undercut mold, and includes two groups of ejection blocks, a movable top plate and a limit block. The inner wall of the undercut mold is provided with a communicating hole communicating with the placement cavity, and the outer hole position of the communicating hole is provided with a mounting groove for placing the ejection block. The other end of the ejection block is fixedly connected to the movable top plate in the placement cavity through a connecting rod. The movable top plate is slidably installed in the placement cavity and elastically connected to the undercut mold through a supporting spring. The limit block is fixedly installed at one end of the guide rail.

[0013] When the undercut die is driven by the power assembly to move a preset stroke toward the end of the guide rail, the limit block can press against the bottom of the movable top plate and drive the ejection block to extend from the installation slot.

[0014] As a further solution of the present invention, the power assembly includes two groups of second telescopic cylinders, which are fixedly mounted on the second mounting plate, and the telescopic ends of the two groups of second telescopic cylinders are respectively fixedly connected to the distal end surfaces of the two groups of guide sliders.

[0015] As a further solution of the present invention, the self-locking component includes a locking rod and a locking sleeve, and the locking rod and the locking sleeve are respectively installed on the corresponding side concave molds, wherein the side wall of the locking rod facing one end of the locking sleeve is provided with multiple groups of step-type mounting grooves, and the mounting groove includes two groups of planes and an inclined surface for connecting the two groups of planes, and a group of locking balls are rollingly installed in each group of mounting grooves, and the locking rod is slidably installed on the limiting cap toward the end of the locking sleeve, and the inner wall of the limiting cap is elastically connected to the top end face of the locking rod through a reset spring, and a connecting groove for the locking ball to roll out is provided on the side of the limiting cap, and a locking hole for the end of the locking rod to be inserted is provided on the locking sleeve, and a locking groove for the corresponding locking ball to be rolled and embedded is provided on the inner wall of the locking hole.

[0016] As a further solution of the present invention, two groups of locking slots are provided on the side of the bottom support mold, and the two groups of locking slots are used for positioning and inserting the locking plugs at the bottom of the corresponding side concave mold.

[0017] As a further solution of the present invention, the screw assembly includes a mounting bracket, a drive plate, a fixed screw, a rotary nut and a power motor. The mounting bracket fixes the rear side of the second mounting plate, the drive plate is slidably mounted on the mounting bracket, and is fixedly connected to the end of the ejector rod. The fixed screw is fixedly mounted on the mounting bracket and forms a spiral pair transmission with the rotary nut rotatably mounted on the drive plate. The power motor is fixedly mounted on the drive plate and is transmission-connected to the rotary nut through the second transmission assembly.

[0018] As a further solution of the present invention, the second transmission assembly includes a power gear and a second transmission gear. The power gear is coaxially fixedly mounted on the output shaft of the power motor, and the second transmission gear is coaxially mounted on the outside of the rotary nut and meshes with the power gear for transmission.

[0019] As a further solution of the present invention, the first transmission assembly includes a first transmission gear, which is coaxially mounted on the outside of the cleaning sleeve and meshed with the power gear.

[0020] As a further solution of the present invention, two groups of locking slots are provided on the side of the bottom support mold, and the two groups of locking slots are used for positioning and inserting the locking plugs at the bottom of the corresponding side concave mold.

[0021] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0022] The present invention designs the existing integrated die mold into two sets of separable side die molds, which are installed on a second mounting plate. Self-locking components installed near the ends of the two sets of side die molds can lock the two sets of side die molds when they are pressed together. At the same time, a cleaning sleeve is rotatably installed outside the ejector rod of the ejection structure.

[0023] 1. After the cold heading process is completed, the power motor in the screw assembly is driven by the meshing transmission between the power gear and the second transmission gear, as well as the transmission of the rotary nut and the fixed nut, driving the drive plate to move the ejector rod and the bottom support die at the end of the ejector rod to eject the steel ball from between the two sets of undercut dies. At the same time, the cleaning sleeve moves and rotates synchronously with the movement of the ejector rod, rotating and cleaning the inner walls of the two sets of undercut dies to remove the debris on them;

[0024] 2. At the same time, the two sets of side concave dies in the present invention are locked and fixed by a self-locking assembly. The separation force applied to the two sets of die assemblies during cold heading processing is converted into a compression force of the locking ball and the locking sleeve, thereby ensuring the connection stability of the two sets of side concave dies while avoiding the problem of damage to the power assembly caused by the partial force of extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a perspective diagram of a cold heading machine for steel ball processing in the present invention.

[0026] Figure 2 Schematic diagram of the second perspective of a cold heading machine for steel ball processing in the present invention

[0027] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of point A in the middle.

[0028] Figure 4 It is a structural schematic diagram of the die structure in the present invention.

[0029] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of point B in the middle.

[0030] Figure 6 It is a partial cross-sectional view of the die structure of the present invention.

[0031] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of point C in the middle.

[0032] In the accompanying drawings: 1. First mounting plate; 2. Second mounting plate; 3. Extrusion structure; 301. First telescopic cylinder; 302. Top pressing die; 4. Concave die structure; 401. Side concave die; 402. Second telescopic cylinder; 403. Guide rail; 404. Guide slider; 405. Push ball assembly; 4051. Ejector block; 4052. Connecting rod; 4053. Support spring; 4054. Active top plate; 4055. Limit block; 406. Self-locking assembly; 4061. Locking rod; 4062. Lock Fixed sleeve; 4063, limit cap; 4064, return spring; 4065, locking ball; 4066, stepped mounting groove; 5, screw assembly; 501, mounting bracket; 502, guide column; 503, drive plate; 504, fixed screw; 505, rotary nut; 506, second transmission gear; 507, power gear; 508, first transmission gear; 509, power motor; 6, ejector structure; 601, ejector rod; 602, bottom support mold; 7, steel ball; 8, cleaning sleeve. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0034] like Figure 1 、 Figure 2 、 Figure 4 as well as Figure 6As shown, in an embodiment of the present invention, a cold heading machine for processing a steel ball 7 includes a processing machine, an extrusion structure 3, a die structure 4 and an ejection structure 6; wherein the processing machine includes a first mounting plate 1 and a second mounting plate 2; the extrusion structure 3 includes a first telescopic cylinder 301 and a top pressing die 302, the first telescopic cylinder 301 is fixedly mounted in a mounting hole opened on the first mounting plate 1, and the top pressing die 302 is fixedly mounted on the extrusion end of the first telescopic cylinder 301; the die structure 4 includes two groups of side dies 401, the two groups of side dies 401 are slidably mounted on the second mounting plate 2, and are driven by a power component on the second mounting plate 2 to move in a mirror image, and the near ends of the two groups of side dies 401 are installed with a self-locking component 406 for locking when they are close together, and a ball pushing component 405 is slidably installed in the side dies 401, and the ball pushing component 405 is used to abut and disengage the steel ball 7 embedded in the inner wall of the side dies 401 when the two groups of side dies 401 are mirror-imaged away from each other;

[0035] The ejection structure 6 includes a bottom supporting mold 602, an ejection rod 601, a screw assembly 5, and a cleaning sleeve 8. The bottom supporting mold 602 is fixedly mounted on the bottom of the ejection rod 601. The proximal ends of the two sets of undercut molds 401 are provided with a clearance opening for inserting the bottom supporting mold 602. The screw assembly 5 is fixedly mounted on the rear side of the second mounting plate 2 and is used to drive the ejection rod 601 for linear ejection. The cleaning sleeve 8 is rotatably mounted on the outer end of the ejection rod 601 and is connected to the screw assembly 5 through a first transmission assembly. The screw assembly 5 drives the cleaning sleeve 8 to rotate synchronously.

[0036] Furthermore, in the present invention, bristles for scraping off debris are installed on the outer wall of the cleaning sleeve 8. When the screw assembly 5 drives the ejector rod 601 to insert into the die structure 4, the first transmission assembly synchronously drives the cleaning sleeve 8 to rotate to clean the inner wall of the side die 401. Of course, in actual design, the cleaning sleeve 8 can also be designed as an air blowing cleaning method or other mixed cleaning structures. The present invention does not impose rigid requirements on the cleaning specifications of the cleaning sleeve 8.

[0037] like Figure 1 As shown, in an embodiment of the present invention, the two groups of side concave dies 401 are fixedly mounted on the corresponding guide sliders 404, and the second mounting plate 2 is provided with a guide rail 403 for the corresponding guide sliders 404 to be slidably mounted. The two groups of side concave dies 401 in the present invention are detachably mounted on the corresponding guide sliders 404, and the side concave dies 401 in the present invention are fixedly connected to the corresponding guide sliders 404 by mounting bolts. When processing steel balls 7 of different specifications, the two groups of side concave dies 401 can be disassembled accordingly and replaced with side concave dies 401 of corresponding specifications.

[0038] like Figure 4 and Figure 5As shown, in the embodiment of the present invention, the ball pushing assembly 405 is installed in the placement cavity provided inside the undercut mold 401, and includes two groups of ejector blocks 4051, a movable top plate 4054 and a limit block 4055. The inner wall of the undercut mold 401 is provided with a communicating hole communicating with the placement cavity, and the outer hole position of the communicating hole is provided with a mounting groove for placing the ejector block 4051. The other end of the ejector block 4051 is fixedly connected to the movable top plate 4054 in the placement cavity through a connecting rod 4052. The movable top plate 4054 is slidably installed in the placement cavity and elastically connected to the undercut mold 401 through a support spring 4053. The limit block 4055 is fixedly installed at one end of the guide rail 403.

[0039] In the present invention, when the cold heading extrusion of the steel ball 7 is actually realized, when the steel ball 7 is squeezed into the inner wall of the side concave die 401 by force and undergoes plastic deformation, at this time, due to the stress release effect of metal extrusion, when the two groups of side concave dies 401 are driven to move away from each other by the power component, the steel ball 7 may stick to the inner wall of the side concave die 401 on one side, and it cannot roll down from the side concave die 401 due to the action of gravity. The present invention drives the mirror images of the two groups of side concave dies 401 to move out through the power component, and cooperates with the two groups of limit blocks 4055 installed on the guide rail 403 to limit the position. The limit blocks 4055 contact the bottom of the movable top plate 4054, so that when the movable top plate 4054 contacts the limit blocks 4055, the movable top plate 4054 is in a stationary state relative to the limit blocks 4055, and synchronously drives the connecting The rod 4052 and the ejection block 4051 stop moving synchronously. At this time, the support spring 4053 used to elastically connect the movable top plate 4054 and the undercut mold 401 is in a deformed state, and the movable undercut mold 401 moves outward relative to the ejection block 4051, so that the ejection block 4051 is ejected from the undercut mold 401, and the two groups of ejection blocks 4051 are automatically ejected to separate the steel ball 7. After the pushing of the steel ball 7 and the cleaning of the undercut mold 401 are completed, the power component drives the two groups of undercut molds 401 to approach and abut each other in a mirror image. At this time, the movable top plate 4054 is separated from the bottom of the limit block 4055. During the movement of the undercut mold 401, the support spring 4053 is reset and deformed to drive the ejection block 4051 to move and retract into the undercut mold 401.

[0040] In the present invention, after the side cavity mold 401 is driven by the power component to move to the end of the guide rail 403 to a preset stroke, the limit block 4055 can be pressed against the bottom of the movable top plate 4054, and the ejection block 4051 is driven to extend from the mounting groove, thereby lifting and separating the steel ball 7 adhered to the inner wall of the side cavity mold 401. At the same time, the two groups of side cavity molds 401 are moved away from a channel for the steel ball 7 to roll out. At this time, the subsequent ejection structure 6 can push the steel ball 7 to be removed from the cavity mold assembly for collection. The preset stroke can be set accordingly according to the collective situation. The present invention does not stipulate that the bottom of the movable top plate 4054 contacts the limit block 4055 after the side cavity mold 401 moves away to a precise stroke.

[0041] like Figure 4 、 Figure 6 and Figure 7 As shown, in the embodiment of the present invention, the power assembly includes two sets of second telescopic cylinders 402, which are fixedly mounted on the second mounting plate 2. The telescopic ends of the two sets of second telescopic cylinders 402 are respectively fixedly connected to the end surfaces away from the two sets of guide sliders 404. In the present invention, the two sets of second telescopic cylinders 402 are controlled by a controller to perform synchronous telescopic movement. Of course, in actual design, the power assembly used to drive the mirror-image movement of the two sets of undercut molds 401 can also use other components with synchronous driving capabilities, such as a double-helical screw structure, etc.

[0042] The locking rod 4061 is slidably mounted on the limiting cap 4063 toward the end of the locking sleeve 4062, and the inner wall of the limiting cap 4063 is elastically connected to the top end face of the locking rod 4061 by a return spring 4064. The side surface of the limiting cap 4063 is provided with a connecting groove for the locking ball 4065 to roll out. The locking sleeve 4062 is provided with a locking hole for the end of the locking rod 4061 to be inserted, and the inner wall of the locking hole is provided with a locking groove for the corresponding locking ball 4065 to be rolled and embedded.

[0043] In the present invention, when the two groups of side concave molds 401 are driven by the power assembly to mirror each other and close to the end faces for pressing, the end of the locking rod 4061 on one group of side concave molds 401 is correspondingly inserted into the locking sleeve 4062 of the other group of side concave molds 401. During the insertion process of the locking rod 4061, the limiting cap 4063 at the end of the locking rod 4061 contacts the bottom surface of the inner cavity of the locking sleeve 4062 before the locking rod 4061, and during the movement of the locking rod 4061, the limiting cap 4063 is squeezed by the locking sleeve 4062 and moves closer to the locking rod 4061. At this time, the return spring 4064 located in the limiting cap 4063 is in a compressed state. During the movement of the limiting cap 4063, the connecting groove on it can guide the locking ball 4 4062 .

[0044] Furthermore, two sets of locking slots are provided on the side of the bottom support die 602, and the two sets of locking slots are used for positioning and inserting the locking plugs at the bottom of the corresponding side concave dies 401. When the end faces of the two sets of side concave dies 401 are pressed tightly, the locking plugs at the bottom of the two sets of side concave dies 401 are correspondingly inserted into the locking slots on both sides of the bottom support die 602, so that during cold heading processing, the locking strokes of the two sets of side concave dies 401 and the bottom support die 602 are the same as a whole.

[0045] like Figure 2 and Figure 3As shown, in the embodiment of the present invention, the screw assembly 5 includes a mounting bracket 501, a driving plate 503, a fixed screw 504, a rotary nut 505 and a power motor 509, the mounting bracket 501 is fixed to the rear side of the second mounting plate 2, the driving plate 503 is slidably mounted on the mounting bracket 501, and is fixedly connected to the end of the ejection rod 601, the fixed screw 504 is fixedly mounted on the mounting bracket 501, and forms a spiral pair transmission with the rotary nut 505 rotatably mounted on the driving plate 503, the power motor 509 is fixedly mounted on the driving plate 503, and is transmission-connected to the rotary nut 505 through the second transmission assembly, wherein the mounting bracket 501 in the present invention is a U-shaped structure, which is fixedly mounted on the rear side of the second mounting plate 2, and a guide column 502 for sliding connection with the driving plate 503 is fixedly installed in the mounting bracket 501, one end of the driving plate 503 is slidingly connected to the guide column 502, and the other end is transmission-connected to the fixed screw 504 through the rotary nut 505;

[0046] After the cold heading process of the die is completed, the present invention is turned on by starting the power motor 509, and the power assembly drives the rotary nut 505 to rotate. The threaded connection between the rotary nut 505 and the fixed screw 504 drives the driving plate 503 to move in a linear direction, and drives the ejector rod 601 to perform synchronous linear movement, driving the bottom support die 602 to perform the ejection and pushing operation of the steel ball 7;

[0047] Furthermore, the second transmission assembly includes a power gear 507 and a second transmission gear 506. The power gear 507 is coaxially fixedly mounted on the output shaft of the power motor 509. The second transmission gear 506 is coaxially mounted on the outside of the rotary nut 505 and meshes with the power gear 507 for transmission. When the power motor 509 rotates, the power gear 507 at its end meshes with the second transmission gear 506 to drive the rotary nut 505 to rotate synchronously, driving the driving plate 503 to move linearly, thereby realizing the ejection displacement of the ejector rod 601.

[0048] Furthermore, the first transmission assembly includes a first transmission gear 508, which is coaxially installed on the outside of the cleaning sleeve 8 and meshed with the power gear 507. At the same time, when the power gear 507 rotates, it drives the cleaning sleeve 8 to rotate synchronously through the transmission connection of the first transmission gear 508. When the cleaning sleeve 8 moves between the two sets of side concave molds 401, the cleaning sleeve 8 rotates to clean the inner walls of the two sets of side concave molds 401 and clean the debris thereon.

[0049] In summary, in the present invention, when preparing for the cold heading operation of the steel ball 7, the power component drives the two sets of side concave dies 401 to be mirror-imaged and close together, and when abutting and pressing, the two sets of self-locking components 406 lock the two sets of side concave dies 401. At this time, the two sets of side concave dies 401 and the bottom support die 602 can form a complete concave die. After the raw material rod is fed into the concave die during processing, the first telescopic cylinder 301 in the extrusion structure 3 drives the top die 302 to be pressed and inserted into the concave die, and the raw material rod is extruded and plastically deformed into a circular structure. After the first telescopic cylinder 301 completes the cold heading extrusion, its reset movement drives the top die 302 to move out of the concave die. At the same time, the power component drives the two sets of side concave dies 401 away from each other in a mirror-image manner, and the two sets of self-locking components 406 are synchronously unlocked. The steel ball 7 leaks out, and at the same time, the two groups of side concave molds 401 are moving, and the ball pushing assembly 405 installed therein can separate the steel ball 7 from the inner wall of the side concave mold 401 to prevent the steel ball 7 from sticking to the inner wall of the side concave mold 401 during plastic deformation. When the two groups of side concave molds 401 move to the preset stroke, the screw assembly 5 drives the ejector rod 601 to move in the direction close to the extrusion structure 3, and the bottom support mold 602 at the end of the ejector rod 601 contacts the steel ball 7 to push the steel ball 7 out of the die structure 4. At the same time, during the movement of the ejector rod 601, the cleaning sleeve 8 on its outer side is rotatably installed and can be inserted into the die structure 4 while moving with the ejector rod 601 to clean the inner walls of the two groups of side concave molds 401 to prevent small metal debris from sticking to the side walls.

[0050] This solution also provides a controller which is mounted on the device. When in use, each electrical device can be started and operated separately through the controller. The power connection method for each electrical device is an existing mature technology, and the control circuit of the controller can be implemented by simple programming by technicians in this field. These are all well-known technologies in this field and will not be elaborated on here.

[0051] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A cold heading machine for steel ball processing, characterized in that: It includes a processing machine, an extrusion structure, a die structure and an ejection structure; Wherein, the processing machine comprises a first mounting plate and a second mounting plate; The extrusion structure includes a first telescopic cylinder and a top pressing die, wherein the first telescopic cylinder is fixedly mounted in a mounting hole provided on the first mounting plate, and the top pressing die is fixedly mounted on the extrusion end of the first telescopic cylinder; The die structure comprises two sets of side dies, which are slidably mounted on the second mounting plate and driven to move in mirror image by the power assembly on the second mounting plate. The close ends of the two sets of side dies are equipped with self-locking assemblies for locking when they are close together. A ball push assembly is slidably mounted inside the side dies, and the ball push assembly is used to abut and disengage the steel ball embedded in the inner wall of the side dies when the mirror images of the two sets of side dies are far away from each other. The ejection structure includes a bottom supporting mold, an ejection rod, a screw assembly and a cleaning sleeve. The bottom supporting mold is fixedly installed at the bottom of the ejection rod. The near ends of the two sets of side concave molds are provided with a clearance opening for inserting the bottom supporting mold. The screw assembly is fixedly installed on the rear side of the second mounting plate, which is used to drive the ejection rod to eject linearly. The cleaning sleeve is rotatably installed on the outer end of the ejection rod and is connected to the screw assembly through the first transmission assembly. The cleaning sleeve is driven by the screw assembly to rotate synchronously.

2. A cold heading machine for steel ball processing according to claim 1, characterized in that: The two groups of side concave molds are fixedly installed on the corresponding guide slide blocks, and the second installation plate is provided with guide rails for the corresponding guide slide blocks to be slidably installed on.

3. A cold heading machine for steel ball processing according to claim 2, characterized in that: The ball pusher assembly is installed in a placement cavity provided inside the side concave mold, and includes two sets of ejector blocks, a movable top plate and a limit block. The inner wall of the side concave mold is provided with a connecting hole communicating with the placement cavity, and the outer hole position of the connecting hole is provided with a mounting groove for placing the ejector block. The other end of the ejector block is fixedly connected with the movable top plate in the placement cavity through a connecting rod, and the movable top plate is slidably installed in the placement cavity and elastically connected with the side concave mold through a supporting spring. The limit block is fixedly installed at one end of the guide track; When the undercut die is driven by the power assembly to move a preset stroke toward the end of the guide track, the limit block can press against the bottom of the movable top plate and drive the ejection block to extend from the installation slot.

4. A cold heading machine for steel ball processing according to claim 2, characterized in that: The power assembly comprises two groups of second telescopic cylinders, which are fixedly mounted on the second mounting plate, and the telescopic ends of the two groups of second telescopic cylinders are respectively fixedly connected to the end surfaces away from the two groups of guide slide blocks.

5. A cold heading machine for steel ball processing according to claim 1, characterized in that: The self-locking component includes a locking rod and a locking sleeve, which are respectively installed on corresponding side concave molds, wherein a plurality of stepped mounting grooves are provided on the side wall of one end of the locking rod facing the locking sleeve, the mounting grooves include two groups of planes and an inclined surface for connecting the two groups of planes, a group of locking balls are rollingly installed in each group of mounting grooves, the locking rod is slidingly installed on a limiting cap toward the end of the locking sleeve, the inner wall of the limiting cap is elastically connected to the top end face of the locking rod through a reset spring, a connecting groove for the locking ball to roll and slide out is provided on the side of the limiting cap, a locking hole for the end of the locking rod to be inserted is provided on the locking sleeve, and a locking groove for the corresponding locking ball to roll and embed is provided on the inner wall of the locking hole.

6. A cold heading machine for steel ball processing according to claim 1, characterized in that: The side surface of the bottom supporting mold is provided with two groups of locking slots, and the two groups of locking slots are used for positioning and inserting the locking plug blocks at the bottom of the corresponding side concave molds.

7. A cold heading machine for steel ball processing according to claim 1, characterized in that: The screw assembly includes a mounting bracket, a drive plate, a fixed screw, a rotary nut and a power motor. The mounting bracket fixes the rear side of the second mounting plate. The drive plate is slidably mounted on the mounting bracket and fixedly connected to the end of the ejector rod. The fixed screw is fixedly mounted on the mounting bracket and forms a spiral pair transmission with the rotary nut rotatably mounted on the drive plate. The power motor is fixedly mounted on the drive plate and is transmission-connected to the rotary nut through the second transmission assembly.

8. A cold heading machine for steel ball processing according to claim 7, characterized in that: The second transmission assembly includes a power gear and a second transmission gear. The power gear is coaxially fixedly mounted on the output shaft of the power motor. The second transmission gear is coaxially mounted on the outer side of the rotary nut and meshes with the power gear for transmission.

9. A cold heading machine for steel ball processing according to claim 8, characterized in that: The first transmission assembly comprises a first transmission gear, which is coaxially mounted on the outside of the cleaning sleeve and meshed with the power gear.

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