Automatic stamping device based on automobile retainer production and stamping method thereof

Abstract

The invention relates to the technical field of stamping, and particularly discloses an automatic stamping device based on automobile retainer production and a stamping method thereof.The automatic stamping device comprises a stamping machine box body, the stamping machine box body is fixed to the ground through a bolt structure, a station used for machining is arranged at one end of the stamping machine box body, a stamping assembly is arranged in the station, and the stamping assembly comprises a hydraulic rod; the upper die is mounted at the top of the inner wall of the station through a hydraulic rod; and the lower die is installed at the bottom of the inner wall of the station, and the bottom of the lower die is fixedly installed at the bottom of the inner wall of the station through a bolt. The upper die is driven by the hydraulic rod to move downwards, so that the lower pressing block on the upper die is extruded with the die cavity, an annular blank is extruded, the blank forms a half part of the retainer, and after two identical parts of the retainer are machined, the two parts are assembled to form the complete retainer.

Description

Technical Field

[0001] The invention relates to the field of stamping technology, and in particular to an automatic stamping device and a stamping method based on automobile retaining frame production. Background Art

[0002] The automatic stamping device is a highly automated production equipment that can complete key production steps such as the stamping and forming of the cage. It realizes the rapid transformation from raw materials to finished products through preset programs and precise mechanical structures, greatly improving production efficiency and product quality. The automatic stamping device for cage production plays a vital role in the bearing manufacturing industry. For example, the prior art CN112808878A discloses a method for producing a cage for a deep groove ball bearing. This technology uses a stamping and cutting device to stamp and cut the plate to obtain an annular sheet; uses a shaping and punching device to shape and punch the annular sheet to obtain a bearing cage assembly; Since the retaining frame is assembled from two thin sheets, its blank thickness is relatively thin. Therefore, the above-mentioned prior art adopts a direct vertical stamping method. Due to metal fatigue, tears will appear at the edges of the blank where the ball fits during stamping. Even if there is no obvious tearing on the appearance after stamping, local fractures may occur during subsequent high-intensity use, causing the ball to roll poorly. Therefore, it is necessary to improve the equipment for stamping the retaining frame. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] The present invention provides an automatic stamping device and stamping method based on automobile cage production, which can solve the problem of local tearing easily caused by existing cage stamping. The specific scheme is as follows: On the one hand, the present invention provides an automatic stamping device based on automobile cage production, comprising: The stamping machine housing is fixed to the ground by a bolt structure. A station for processing is provided at one end of the stamping machine housing. A stamping assembly is provided in the station. The stamping assembly includes: Hydraulic lever; An upper die, the upper die being mounted on the top of the inner wall of the station via a hydraulic rod; A lower die is installed at the bottom of the inner wall of the station, and the bottom of the lower die is fixed to the bottom of the inner wall of the station by bolts; A circular groove is provided on the top of the lower die, and the bottom of the inner wall of the circular groove is inclined; A lower pressing block, the lower pressing block is installed below the upper die; A movable block is arranged on the inclined surface at the bottom of the inner wall of the circular groove. Under the action of gravity, the movable block can slide along the inclined surface of the circular groove toward the center of the circular groove, so that during the extrusion molding process of the retaining frame blank, the parts around the blank can be brought closer to the center.

[0005] Preferably, it also includes: A slide rail, wherein the slide rail is fixedly connected to the inclined surface at the bottom of the inner wall of the circular groove, and a slide groove matching the slide rail is provided at the bottom of the movable block, and the slide groove is slidably connected to the slide rail; A sliding rod, the sliding rod is fixedly connected to the outer wall of the movable block, and the central axis of the sliding rod is parallel to the direction of the inclined surface of the bottom of the circular groove; A sliding hole is provided in the middle of the lower mold, the central axis of the sliding hole is concentric with the central axis of the sliding rod, the sliding rod is slidably connected to the inner wall of the sliding hole, a first spring is connected between one end of the sliding rod and the inner wall of the sliding hole, and a second spring is connected between the outer wall of the movable block and the outer wall of the raised part in the middle of the lower mold.

[0006] Preferably, it also includes: A first air pressure hole is provided inside the lower mold, one end of the first air pressure hole penetrates into the interior of the sliding hole, an air inlet groove is provided at the bottom of the lower mold, the other end of the first air pressure hole penetrates into the interior of the air inlet groove, and high-pressure gas can be introduced into the air inlet groove. The high-pressure gas is injected into the air inlet groove and the first air pressure hole, so that the sliding rod can be controlled to slide inside the sliding hole under the action of the high-pressure gas.

[0007] Preferably, a mold groove is formed on the top of the movable block, and the shape of the mold groove is semicircular, and the shape and size of the mold groove match the shape of the position on the retaining frame that matches the ball.

[0008] Preferably, the lower pressing block is movably installed at the bottom of the upper die. When the upper die is pressed downward to extrude the annular blank to form a retaining frame, the movable block can slide along the bottom inclined surface of the circular groove due to the downward pressure, and the lower pressing block can move synchronously with the movable block toward the center of the circular groove.

[0009] Preferably, blocks are provided at both ends of the lower pressing block, the spacing between the two blocks matches the blank width of the retaining frame, a telescopic rod is connected to the top of the lower pressing block, a limiting groove is provided at the bottom of the upper mold, a telescopic hole is provided inside the limiting groove, the side surface of the lower pressing block is slidably connected to the limiting groove, the telescopic rod is slidably connected to the inner wall of the telescopic hole, a third spring is connected between one end of the telescopic rod and the inner wall of the telescopic hole, and the limiting groove is designed as an inclined surface.

[0010] Preferably, the lower pressing plate is installed below the upper die, and a plurality of avoidance grooves are provided around the lower pressing plate, and the avoidance grooves are used to avoid a plurality of lower pressing blocks; A sliding column, wherein the sliding column is fixedly connected to the middle part of the lower pressing plate, a fourth spring is connected to the top of the sliding column, a sliding groove is provided at the bottom of the upper die, the sliding column is sealingly and slidingly connected to the sliding groove, and the top of the fourth spring is fixedly connected to the top of the inner wall of the sliding groove; The electromagnet is installed inside the lower pressing plate. A cavity is provided inside the lower pressing plate. The electromagnet is installed inside the cavity. A controller is also installed inside the cavity. The controller is used to control the on and off of the electromagnet.

[0011] Preferably, it also includes: Also included is an air supply assembly, the air supply assembly comprising: A first air supply pipe, wherein the first air supply pipe is fixedly installed inside the punching machine housing, and a first solenoid valve and a first pressure gauge are connected to the middle of the first air supply pipe; A second air supply pipe, wherein the second air supply pipe is fixedly installed inside the punching machine housing, and a second solenoid valve and a second pressure gauge are connected to the middle of the second air supply pipe; One end of the second air supply pipe and the first air supply pipe are both connected to the air outlet of the pressure pump, the other end of the second air supply pipe is connected to the bottom of the air inlet groove, the other end of the first air supply pipe is connected to the inside of the sliding groove, and the lead wire at one end of the controller is led out from one end of the first air supply pipe.

[0012] Preferably, it also includes a clamping tool, and the clamping tool includes: Cam pieces, the cam pieces are four in number, and the four cam pieces are rotatably mounted on four corners of the top of the lower die respectively; Gears, there are four gears, and the four gears are respectively fixedly connected to the tops of the four cam pieces; A gear ring, the outer wall teeth of which are meshed with the four gears, and the gear ring is rotatably mounted on the top of the lower die.

[0013] On the other hand, the present invention also provides an automatic stamping method based on automobile cage production, comprising the following steps: S1. Place the annular blank of the retainer on the movable block of the lower die, keep the blank in the circular groove of the lower die, and keep the blank in the center of the circular groove; S2. The hydraulic press is started, and the hydraulic rod drives the upper die to move downward to punch the blank of the cage; S3. During the stamping process, the lower pressing block at the bottom of the upper die and the top of the movable block squeeze each other, and the movable block moves along the inclined surface of the circular groove to reduce the diameter of the blank; S4. Finally, a spherical space is formed around the blank, and the spherical space is used to fit the balls on the bearing to complete the stamping work of the cage.

[0014] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. The upper die is driven downward by the hydraulic rod to squeeze the lower pressing block on the upper die with the die groove, and the circular blank is squeezed to form one half of the cage. After processing two parts of two identical cages, the two parts are assembled to form a complete cage. Since the blank can slide on the inclined surface at the bottom of the circular groove through the movable block during the mutual squeezing of the lower pressing block and the movable block, the surrounding part of the blank can be brought closer to the middle during the extrusion process to avoid direct vertical extrusion of the blank, which may cause tearing of a part of the blank, thereby ensuring that the blank is protected during the stamping process and that the final product meets the quality requirements.

[0015] 2. The gear ring is driven to rotate by the driving device, so that the gear ring drives the gear and cam piece to rotate synchronously. The default position of the cam piece is: the spacing between the inner sides of the four cam pieces is the largest. When the retainer blank is placed on the lower die, the four cam pieces start to rotate driven by the gear ring. At this time, the spacing between the four cam pieces gradually decreases, and finally the retainer blank is squeezed to the center position of the lower die, which is convenient for subsequent stamping processing.

[0016] 3. The on and off of the electromagnet is controlled by the controller. When the electromagnet is turned on, it can generate magnetic force to adsorb the cage blank which is also a magnetic material, so as to facilitate the removal of the material after processing.

[0017] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 It is an overall stereogram of the present invention; Figure 2 It is a side sectional view of the present invention; Figure 3 A three-dimensional diagram of the upper mold and the lower mold of the present invention; Figure 4 It is a cross-sectional view of the upper mold and the lower mold of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 It is a partial cross-sectional view of the upper mold of the present invention; Figure 7 is a three-dimensional diagram of the retainer of the present invention; Figure 8 A three-dimensional diagram of a single movable block of the present invention; Fig. 9 A three-dimensional diagram of a single pressing block of the present invention; Fig.10 An exploded view of the lower pressing block and the lower pressing plate of the present invention; Fig.11 A three-dimensional diagram of the movable block gear ring of the present invention; Fig.12 It is a three-dimensional diagram of several pressing blocks and several movable blocks of the present invention; Fig.13 A three-dimensional diagram of the movable block and the lower mold of the present invention; Fig.14 It is a three-dimensional diagram of several movable blocks of the present invention; Fig.15 It is a three-dimensional diagram of the clamping tool of the present invention.

[0019] The reference numerals are as follows: 101, stamping machine housing; 102, workstation; 201, upper die; 202, lower die; 203, hydraulic rod; 204, round groove; 205, slide rail; 206, movable block; 207, sliding rod; 208, sliding hole; 209, first spring; 210, second spring; 211, first air pressure hole; 212, air inlet groove; 213, slide groove; 214, die groove; 215, lower pressing block; 217, stopper; 218, telescopic rod ; 219, third spring; 220, sliding column; 221, lower pressure plate; 222, fourth spring; 223, electromagnet; 224, limit groove; 225, telescopic hole; 3, retaining frame; 301, ball; 401, cam plate; 402, gear ring; 403, gear; 501, first air supply pipe; 502, first solenoid valve; 503, first pressure gauge; 504, second air supply pipe; 505, second solenoid valve; second pressure gauge. DETAILED DESCRIPTION

[0020] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used to explain the principles of the present invention together with the embodiments of the present invention.

[0021] Example 1: See Figure 1-Figure 15 This embodiment provides an automatic stamping device based on automobile cage production, which can automatically stamp the cage in the automobile bearing, and includes the following parts: The stamping machine housing 101 is fixed to the ground by a bolt structure. A station 102 for processing is provided at one end of the stamping machine housing 101. The station 102 has a stamping assembly therein. The stamping assembly includes: An upper die 201, the upper die 201 is mounted on the top of the inner wall of the station 102 via a hydraulic rod 203; A lower mold 202 is installed at the bottom of the inner wall of the station 102, and the bottom of the lower mold 202 is fixed to the bottom of the inner wall of the station 102 by bolts; A circular groove 204 is provided on the top of the lower mold 202, and the bottom of the inner wall of the circular groove 204 is inclined; A movable block 206, wherein the movable block 206 is disposed on the inclined surface at the bottom of the inner wall of the circular groove 204, and under the action of gravity, the movable block 206 can slide along the inclined surface of the circular groove 204 toward the center of the circular groove 204; A slide rail 205, wherein the slide rail 205 is fixedly connected to the inclined surface at the bottom of the inner wall of the circular groove 204, and a slide groove 213 matching the slide rail 205 is provided at the bottom of the movable block 206, and the slide groove 213 is slidably connected to the slide rail 205; A sliding rod 207, wherein the sliding rod 207 is fixedly connected to the outer wall of the movable block 206, the central axis of the sliding rod 207 is parallel to the direction of the bottom inclined surface of the circular groove 204, a sliding hole 208 is opened in the middle of the lower mold 202, the central axis of the sliding hole 208 is concentrically arranged with the central axis of the sliding rod 207, the sliding rod 207 is slidably connected to the inner wall of the sliding hole 208, a first spring 209 is connected between one end of the sliding rod 207 and the inner wall of the sliding hole 208, a second spring 210 is connected between the outer wall of the movable block 206 and the outer wall of the middle raised part of the lower mold 202, and the first spring 209 and the second spring 210 are both compression springs; A first air pressure hole 211 is provided inside the lower mold 202, one end of the first air pressure hole 211 penetrates into the inside of the sliding hole 208, an air inlet groove 212 is provided at the bottom of the lower mold 202, the other end of the first air pressure hole 211 penetrates into the inside of the air inlet groove 212, and the air inlet groove 212 can be passed with high-pressure gas, which is injected into the air inlet groove 212 and the first air pressure hole 211, so that under the action of the high-pressure gas, the sliding rod 207 can be controlled to slide a certain distance inside the sliding hole 208, so that the movable block 206 can slide along the bottom inclined surface of the circular groove 204; A die groove 214 is provided on the top of the movable block 206. The shape of the die groove 214 is semicircular. The shape and size of the die groove 214 match the shape of the position on the retainer 3 that is adapted to the ball 301. The lower pressing block 215 is installed below the upper die 201. The lower pressing block 215 is movably installed at the bottom of the upper die 201. When the upper die 201 is pressed downward to extrude the annular blank to form the retainer 3, the movable block 206 can slide along the bottom inclined surface of the circular groove 204 due to the downward pressure. At the same time, the lower pressing block 215 can follow the movable block 206 and move synchronously toward the center of the circular groove 204. In the above scheme, the upper die 201 is driven downward by the hydraulic rod 203, so that the lower pressing block 215 on the upper die 201 is pressed against the die groove 214, and the annular blank is extruded, so that the blank forms one half of the retainer 3. After processing two parts of two identical retainers 3, the two parts are assembled to form a complete retainer 3. Since the blank can slide on the inclined surface at the bottom of the circular groove 204 through the movable block 206 during the mutual extrusion between the lower pressing block 215 and the movable block 206, the surrounding parts of the blank can be brought closer to the middle during the extrusion molding process of the blank, avoiding the direct vertical extrusion of the blank, which causes a tearing of a part of the blank, thereby ensuring that the blank is protected during the stamping process, so that the final product meets the quality requirements; It should be noted that, when actually in use, the ball 301 is placed in the groove that matches the retaining frame 3 and the ball 301, and then the two parts of the retaining frame 3 are fixed with rivets to complete the assembly. Finally, the retaining frame 3 and the ball 301 are placed between the inner ring and the outer ring of the bearing to complete the assembly of the entire bearing. It should also be noted that the inner wall around the retaining frame 3 that matches the ball 301 is a spherical shape that is concave inward, so the bottom of the lower pressure block 215 is also semi-spherical.

[0022] It also includes a stopper 217, which is arranged at both ends of the lower pressing block 215. The spacing between the two stoppers 217 matches the blank width of the retaining frame 3. The stopper 217 can prevent the edge of the blank from being squeezed and offset when the lower pressing block 215 and the die groove 214 are used to extrude the blank. A telescopic rod 218 is connected to the top of the lower pressing block 215, and a limiting groove 224 is provided at the bottom of the upper die 201. A telescopic hole 225 is provided inside the limiting groove 224. The side of the lower pressing block 215 is slidably connected to the limiting groove 224, and the telescopic rod 218 is slidably connected to the inner wall of the telescopic hole 225. A third spring 219 is connected between one end of the telescopic rod 218 and the inner wall of the telescopic hole 225, and the limiting groove 224 is designed as an inclined surface. A lower pressing plate 221 is installed below the upper mold 201. A plurality of avoidance grooves are provided around the lower pressing plate 221 to avoid a plurality of lower pressing blocks 215. A sliding column 220, wherein the sliding column 220 is fixedly connected to the middle of the lower pressing plate 221, a fourth spring 222 is connected to the top of the sliding column 220, a sliding groove is provided at the bottom of the upper die 201, the sliding column 220 is sealingly and slidingly connected to the sliding groove, and the top of the fourth spring 222 is fixedly connected to the top of the inner wall of the sliding groove; The electromagnet 223 is installed inside the lower pressure plate 221. A cavity is opened inside the lower pressure plate 221. The electromagnet 223 is installed inside the cavity. A controller is also installed inside the cavity. The controller is used to control the on and off of the electromagnet 223. One end of the controller has a lead. When the electromagnet 223 is turned on, it can generate magnetic force to adsorb the retaining frame 3 blank which is also a magnetic material, so as to facilitate the removal of the material after processing is completed.

[0023] Also included is an air supply assembly, the air supply assembly comprising: A first air supply pipe 501, wherein the first air supply pipe 501 is fixedly installed inside the stamping machine housing 101, and a first solenoid valve 502 and a first pressure gauge 503 are connected to the middle of the first air supply pipe 501; A second air supply pipe 504, wherein the second air supply pipe 504 is fixedly installed inside the punching machine housing 101, and a second solenoid valve 505 and a second pressure gauge 506 are connected to the middle of the second air supply pipe 504; One end of the second air supply pipe 504 and the first air supply pipe 501 are both connected to the air outlet of the pressure pump, the other end of the second air supply pipe 504 is connected to the bottom of the air inlet groove 212, the other end of the first air supply pipe 501 is connected to the inside of the sliding groove, and the lead wire at one end of the controller is led out from one end of the first air supply pipe 501; The air pressure inside the second air supply pipe 504 is detected by the second pressure gauge 506, so that the second solenoid valve 505 is used to control the on and off of the air according to the different hardness and diameters of the blanks, and the air pressure is adjusted to control the sliding distance of the movable block 206, so that the diameter of the final finished retaining frame can be adjusted (the specific reason is: when the air pressure inside the second air supply pipe 504, the air inlet groove 212 and the first air pressure hole 211 and the sum of the pressures of the first spring 209 and the second spring 210 is greater than the downward pressure of the downward pressure block 215, the movable block 206 cannot slide under the downward pressure of the downward pressure block 215, so that several movable blocks 206 are maintained at a specific position on the bottom inclined surface of the circular groove 204. At this time, the annular diameter formed by the several movable blocks 206 is the diameter of the final retaining frame 3).

[0024] Also included is a clamping tool, the clamping tool comprising: Cam pieces 401, there are four cam pieces 401, and the four cam pieces 401 are rotatably mounted on four corners of the top of the lower mold 202 respectively; Gears 403, there are four gears 403, and the four gears 403 are respectively fixedly connected to the tops of the four cam pieces 401; A gear ring 402, wherein the outer wall teeth of the gear ring 402 mesh with the four gears 403, and the gear ring 402 is rotatably mounted on the top of the lower mold 202; In the above scheme, the gear ring 402 is driven to rotate by the driving device, so that the gear ring 402 drives the gear 403 and the cam piece 401 to rotate synchronously. The default position state of the cam piece 401 is: the spacing between the inner sides of the four cam pieces 401 is the largest. When the retaining frame 3 blank is placed on the lower mold 202, the four cam pieces 401 start to rotate driven by the gear ring 402. At this time, the spacing between the four cam pieces 401 gradually decreases, and finally the retaining frame 3 blank is squeezed to the center position of the lower mold 202, so as to facilitate subsequent stamping processing.

[0025] Embodiment 2: The technical solution of this embodiment is different from that of Embodiment 1 in that this embodiment provides an automatic stamping method for automobile cage production, comprising the following steps: S1, placing the annular blank for producing the retainer 3 on the movable block 206 of the lower die 202, and keeping the blank in the circular groove 204 of the lower die 202, and keeping the blank at the center of the circular groove 204; S2, the hydraulic press is started, and the hydraulic rod 203 drives the upper die 201 to move downward to punch the blank of the retainer 3; S3. During the stamping process, the lower pressing block 215 at the bottom of the upper die 201 and the top of the movable block 206 are pressed against each other, and the movable block 206 moves along the inclined surface of the circular groove 204 to reduce the diameter of the blank; S4. Finally, a spherical space is formed around the blank. The spherical space is used to fit the ball 301 on the bearing, thereby completing the stamping work of the retainer 3.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0027] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic stamping device based on automobile cage production, characterized in that: include: A stamping machine housing (101) is fixed to the ground by means of a bolt structure. A workstation (102) for processing is provided at one end of the stamping machine housing (101). A stamping assembly is provided in the workstation (102). The stamping assembly comprises: Hydraulic rod (203); An upper die (201), the upper die (201) being mounted on the top of the inner wall of the workstation (102) via a hydraulic rod (203); A lower mold (202) is mounted on the bottom of the inner wall of the workstation (102), and the bottom of the lower mold (202) is fixed to the bottom of the inner wall of the workstation (102) by bolts; A circular groove (204) is provided on the top of the lower mold (202), and the bottom of the inner wall of the circular groove (204) is arranged in an inclined surface; A lower pressing block (215), the lower pressing block (215) being installed below the upper mold (201); A movable block (206) is arranged on the inclined surface at the bottom of the inner wall of the circular groove (204); under the action of gravity, the movable block (206) can slide along the inclined surface of the circular groove (204) toward the center of the circular groove (204), so that during the extrusion molding process of the retaining frame (3) blank, the surrounding parts of the blank can be moved closer to the center.

2. The automatic stamping device for automobile cage production according to claim 1, characterized in that: Also includes: A slide rail (205), the slide rail (205) being fixedly connected to the inclined surface at the bottom of the inner wall of the circular groove (204), a slide groove (213) matching the slide rail (205) being provided at the bottom of the movable block (206), and the slide groove (213) being slidably connected to the slide rail (205); A sliding rod (207), the sliding rod (207) being fixedly connected to the outer wall of the movable block (206), and the central axis of the sliding rod (207) being parallel to the direction of the bottom inclined surface of the circular groove (204); A sliding hole (208) is provided in the middle of the lower mold (202), the central axis of the sliding hole (208) is concentric with the central axis of the sliding rod (207), the sliding rod (207) is slidably connected to the inner wall of the sliding hole (208), a first spring (209) is connected between one end of the sliding rod (207) and the inner wall of the sliding hole (208), and a second spring (210) is connected between the outer wall of the movable block (206) and the outer wall of the raised portion in the middle of the lower mold (202).

3. The automatic stamping device for automobile cage production according to claim 2, characterized in that: Also includes: A first air pressure hole (211) is provided inside the lower mold (202), one end of the first air pressure hole (211) penetrates into the interior of the sliding hole (208), an air inlet groove (212) is provided at the bottom of the lower mold (202), the other end of the first air pressure hole (211) penetrates into the interior of the air inlet groove (212), and high-pressure gas can be introduced into the air inlet groove (212) and the first air pressure hole (211), so that the sliding of the sliding rod (207) inside the sliding hole (208) can be controlled under the action of the high-pressure gas.

4. The automatic stamping device for automobile cage production according to claim 1, characterized in that: A mold groove (214) is provided on the top of the movable block (206). The mold groove (214) is semicircular in shape. The shape and size of the mold groove (214) match the shape of the position on the retaining frame (3) that is adapted to the ball (301).

5. The automatic stamping device for automobile cage production according to claim 1, characterized in that: The lower pressing block (215) is movably mounted at the bottom of the upper die (201). When the upper die (201) is pressed downward to extrude the annular blank to form the retaining frame (3), the movable block (206) can slide along the bottom inclined surface of the circular groove (204) due to the downward pressure. At the same time, the lower pressing block (215) can follow the movable block (206) and move synchronously toward the center of the circular groove (204).

6. The automatic stamping device for automobile cage production according to claim 1, characterized in that: Stoppers (217) are provided at both ends of the lower pressing block (215), the spacing between the two stoppers (217) matches the blank width of the retaining frame (3), a telescopic rod (218) is connected to the top of the lower pressing block (215), a limiting groove (224) is provided at the bottom of the upper die (201), a telescopic hole (225) is provided inside the limiting groove (224), a side surface of the lower pressing block (215) is slidably connected to the limiting groove (224), the telescopic rod (218) is slidably connected to the inner wall of the telescopic hole (225), a third spring (219) is connected between one end of the telescopic rod (218) and the inner wall of the telescopic hole (225), and the limiting groove (224) is designed as an inclined surface.

7. The automatic stamping device for automobile cage production according to claim 1, characterized in that: A lower pressing plate (221) is installed below the upper die (201), and a plurality of avoidance grooves are provided around the lower pressing plate (221), and the avoidance grooves are used to avoid a plurality of lower pressing blocks (215); A sliding column (220), wherein the sliding column (220) is fixedly connected to the middle of the lower pressing plate (221), a fourth spring (222) is connected to the top of the sliding column (220), a sliding groove is provided at the bottom of the upper mold (201), the sliding column (220) is sealingly slidably connected to the sliding groove, and the top of the fourth spring (222) is fixedly connected to the top of the inner wall of the sliding groove; The electromagnet (223) is installed inside the lower pressing plate (221). A cavity is provided inside the lower pressing plate (221). The electromagnet (223) is installed inside the cavity. A controller is also installed inside the cavity. The controller is used to control the on and off of the electromagnet (223).

8. The automatic stamping device for automobile cage production according to claim 7, characterized in that: Also includes: Also included is an air supply assembly, the air supply assembly comprising: A first air supply pipe (501), the first air supply pipe (501) being fixedly installed inside the punching machine housing (101), and a first solenoid valve (502) and a first pressure gauge (503) being connected to the middle of the first air supply pipe (501); a second air supply pipe (504), the second air supply pipe (504) being fixedly installed inside the punching machine housing (101), a second solenoid valve (505) and a second pressure gauge (506) being connected to the middle of the second air supply pipe (504); One end of the second air supply pipe (504) and the first air supply pipe (501) are both connected to the air outlet of the pressure pump, the other end of the second air supply pipe (504) is connected to the bottom of the air inlet groove (212), the other end of the first air supply pipe (501) is connected to the inside of the sliding groove, and the lead wire at one end of the controller is led out from one end of the first air supply pipe (501).

9. The automatic stamping device for automobile cage production according to claim 1, characterized in that: Also included is a clamping tool, the clamping tool comprising: Cam pieces (401), there are four cam pieces (401), and the four cam pieces (401) are rotatably mounted on four corners of the top of the lower mold (202) respectively; Gears (403), there are four gears (403), and the four gears (403) are respectively fixedly connected to the tops of the four cam pieces (401); A gear ring (402), wherein the outer wall teeth of the gear ring (402) mesh with the four gears (403), and the gear ring (402) is rotatably mounted on the top of the lower mold (202).

10. An automatic stamping method for automobile cage production, using the automatic stamping device for automobile cage production according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, placing a ring-shaped blank for producing a retainer (3) on a movable block (206) of a lower die (202), and keeping the blank in a circular groove (204) of the lower die (202), and keeping the blank at a central position of the circular groove (204); S2, the hydraulic press is started, and the hydraulic rod (203) drives the upper die (201) to move downward to punch the blank of the retainer (3); S3. During the stamping process, the lower pressing block (215) at the bottom of the upper die (201) and the top of the movable block (206) are pressed against each other, and the movable block (206) moves along the inclined surface of the circular groove (204), so that the diameter of the blank is reduced; S4. Finally, a spherical space is formed around the blank. The spherical space is used to fit the ball (301) on the bearing, thereby completing the stamping work of the retainer (3).

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