Automatic discharging device of stamping die

Abstract

The invention discloses an automatic discharging device of a stamping die, relates to the field of stamping dies, and solves the problem that the gas demolding force of an existing discharging device is difficult to control. The automatic discharging device comprises a die base, a lower die is fixedly connected to the top of the die base, and a top plate is arranged above the lower die; four hydraulic rods are fixedly connected between the top plate and the mold base, a supporting frame is fixedly connected to the top of the mold base, an upper mold is fixedly connected to the bottom of the top plate, and four side clamping mechanisms are arranged on the outer side of a lower mold; the side clamping mechanism is used for clamping and fixing the outer side of the stamping part on the lower die, the side clamping mechanism is separated from the outer side of the stamping part after stamping is finished, the stamping part on the surface of the lower die is automatically discharged, the material ejecting mechanism is installed in the lower die, and a lifting mechanism is further arranged in the lower die. Therefore, the effects of automatic positioning and convenient demolding are achieved.

Description

Technical Field

[0001] The present invention relates to the field of stamping dies, and particularly to an automatic part discharging device for a stamping die. Background Art

[0002] Stamping is a metal forming method that applies pressure to a material using a die installed on a press at room temperature to cause separation or plastic deformation, thereby obtaining the required parts. A stamping die is a special process equipment for processing materials into parts in cold stamping, called a cold stamping die. A stamping die is divided into an upper die and a lower die. The material is placed on the lower die, and the upper die presses downward to punch holes or deform the material, stamping the workpiece into the required shape. After stamping, the completed material is taken out. The product has basically the same shape and size, strong interchangeability, and is convenient for production and use.

[0003] The existing Chinese patent document: CN113145761A discloses an automatic demoulding device and working method for a stamping machine. By adding a demoulding component to the existing stamping machine, after the stamping machine stamps the workpiece, the stamping part is blown loose by the demoulding component, so that the adhered stamping part is separated from the lower die. The adhered stamping part is loosened without the action of mechanical force, avoiding damage to the stamping part and the die, and solving the problems of deformation and damage of the stamping part and damage to the stamping machine die existing in the current process of taking out the stamping part. However, when the above automatic demoulding device is in use, after stamping, it is necessary to blow the stamping part away from the lower die by gas. When the stamping part is heavy, a high force is required for gas discharge. When stamping multiple stamping parts with different weights in sequence, the gas force is inconsistent, and it is easy for heavy stamping parts to be difficult to demould, while light stamping parts pop out quickly, which is relatively dangerous. For this reason, we propose an automatic part discharging device for a stamping die. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic part discharging device for a stamping die to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: An automatic part discharging device for a stamping die, comprising a die base, a lower die fixedly connected to the top of the die base, a top plate arranged above the lower die, four equally spaced hydraulic rods fixedly connected between the top plate and the die base, a support frame fixedly connected to the top of the die base and in contact with the outer side of the top plate, two symmetrically distributed sliding rods fixedly connected between the inner side of the support frame and the die base, bumps arranged on the surface of the sliding rods and in contact with the top of the top plate, the sliding rods passing through the surface of the top plate, a first spring sleeved on the outer side of the sliding rods and fixed between the top plate and the die base, an upper die fixedly connected to the bottom of the top plate, four annularly distributed side clamping mechanisms for positioning a stamping part arranged outside the lower die; a blanking mechanism for automatically discharging the stamping part on the surface of the lower die, the blanking mechanism being installed inside the lower die, and a lifting mechanism for facilitating part taking also arranged inside the lower die.

[0006] Preferably, the side clamping mechanism includes two symmetrically installed positioning frames on the outer side of the lower die, the bottom of the positioning frames being fixedly connected to the top of the die base, a push bar arranged between the two positioning frames, an installation groove for limiting the sliding of the push bar being opened on the outer side of the lower die, a limiting plate fixedly connected to the top of the positioning frame and in contact with the outer side of the push bar, two symmetrically distributed guide rods fixedly connected to the side of the push bar close to the limiting plate, the guide rods passing through the surface of the limiting plate, a limiting nut fixedly installed at one end of the guide rod, the limiting nut and the guide rod being a detachable structure, a second spring fixedly connected between the limiting nut and the limiting plate and sleeved on the outer side of the guide rod, a side pressing plate fixedly connected to the side of the push bar away from the limiting plate, both ends of the side pressing plate being of inclined plane structures, a pressing groove being opened at the top of the push bar and located between the two positioning frames, a pressing bar arranged above the pressing groove, the width of the pressing bar corresponding to the width of the pressing groove, the pressing bar being fixedly connected to the bottom of the top plate, the length of the pressing bar being greater than the length of the upper die, and both the pressing groove and the pressing bar being of corresponding inclined plane structures.

[0007] Preferably, the blanking mechanism includes an installation cavity opened inside the lower die, a limiting abutting plate fixedly connected to the bottom inner wall of the installation cavity, a movable plate arranged above the limiting abutting plate, the movable plate being of a quadrilateral structure, the outer side of the movable plate being in contact with the inner wall of the installation cavity, the outer side of the side pressing plate being in contact with the outer side of the movable plate, both the outer side of the movable plate and the outer side of the side pressing plate being of corresponding inclined plane structures, a number of equally spaced third springs fixedly connected between the movable plate and the limiting abutting plate, a lower pressing plate arranged on the top of the movable plate, a number of equally spaced positioning rods fixedly connected to the bottom of the lower pressing plate, and a perforation for limiting the insertion of the positioning rods being opened on the surface of the movable plate.

[0008] Preferably, the lifting mechanism includes four mounting frames respectively installed on four sides of the lower pressing plate. The bottom of the mounting frame is on the same horizontal line as the bottom of the lower pressing plate. The outer side of the mounting frame is of an inclined surface structure, and the inclination angle of the outer side of the mounting frame is the same as that of the side pressing plate. Long slots are obliquely arranged on both sides of the inner wall of the mounting frame, and the included angle between the long slot and the outer side of the mounting frame is 90 degrees. A limiting sliding cylinder is slidably limited in the inner wall of the long slot. An installation rod is fixedly connected between the two limiting sliding cylinders. A slider is slidably limited in the inner wall of the long slot, and the slider is in contact with the outer wall of the limiting sliding cylinder. A fourth spring is fixedly connected to the side of the slider away from the limiting sliding cylinder, and one end of the fourth spring is fixed on the inner wall of the long slot.

[0009] Preferably, the included angles at both ends of the side pressing plate are both 135 degrees. Positioning rib strips are fixedly connected to both sides of the push strip. The two sides of the positioning rib strip are arc-shaped surfaces, and the end of the positioning rib strip close to the lower mold is an inclined surface, and the inclined surface at one end of the positioning rib strip corresponds to the inclined surfaces at both ends of the side pressing plate. A chute for slidably limiting the positioning rib strip is opened on the inner wall of the installation groove.

[0010] Preferably, the bottom of the upper mold is fixedly connected with an upper pressing plate. The upper pressing plate is directly below the lower pressing plate, and the size of the upper pressing plate is the same as that of the lower pressing plate.

[0011] Preferably, grooves for fixedly installing the third spring are opened at the bottom of the movable plate and the top of the limiting abutting plate. The lowest height at which the third spring contracts is less than the sum of the groove heights on the movable plate and the limiting abutting plate.

[0012] Preferably, a rubber sleeve is fixedly sleeved on the outer side of the installation rod. The rubber sleeve is located on both sides of the inner wall of the installation frame. An opening for slidably limiting the installation rod is opened on the outer side of the long slot, and the inclination angle of the opening corresponds to that of the long slot.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the side clamping mechanism of the present invention, the hydraulic rod moves the upper mold downward to clamp and fix the outer side of the stamping part on the lower mold, and after the stamping is completed, it separates from the outer side of the stamping part, facilitating the user to take the material, thereby achieving the effects of automatically positioning the stamping part and facilitating demoulding.

[0014] 2. Through the ejecting mechanism of the present invention, before stamping, the lower pressing plate is automatically moved, facilitating the side pressing plate to position the outer side of the stamping part, and after the stamping is completed, it pushes the bottom of the stamping part to prevent the outer side of the stamping part from sticking to the lower mold, thereby achieving the effect of facilitating quick part taking.

[0015] 3. Through the lifting mechanism of the present invention, mounting rods are arranged on the side surface of the lower pressing plate and automatically retracted into the mounting frame during stamping. After the stamping is completed, the mounting rods are automatically ejected, facilitating the user to hold the mounting rods and disassemble the upper pressing plate, thereby achieving the effect of facilitating installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the pressing strip and the support frame in the present invention; Figure 3 It is a schematic diagram of the top plate and the upper pressing plate in the present invention; Figure 4 It is a schematic diagram of the positioning frame and the pushing strip in the present invention; Figure 5 It is a schematic diagram of the side pressing plate and the movable plate in the present invention; Figure 6 It is a schematic diagram of the limiting abutting plate and the lower mold in the present invention; Figure 7 It is a schematic diagram of the lower pressing plate and the mounting frame in the present invention; Figure 8 It is a schematic diagram of the limiting sliding cylinder and the mounting rod in the present invention;

[0017] In the figure: 1. Mold base; 2. Lower mold; 3. Side clamping mechanism; 301. Positioning frame; 302. Pushing strip; 303. Installation groove; 304. Limiting plate; 305. Guide rod; 306. Limiting nut; 307. Second spring; 308. Side pressing plate; 309. Pressing groove; 310. Pressing strip; 4. Ejecting mechanism; 401. Installation cavity; 402. Limiting abutting plate; 403. Movable plate; 404. Third spring; 405. Lower pressing plate; 406. Positioning rod; 5. Lifting mechanism; 501. Mounting frame; 502. Long strip groove; 503. Limiting sliding cylinder; 504. Mounting rod; 505. Slide block; 506. Fourth spring; 6. Top plate; 7. Hydraulic rod; 8. Support frame; 9. Slide rod; 10. First spring; 11. Upper mold; 12. Positioning rib; 13. Upper pressing plate; 14. Rubber sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0019] Embodiment 1

[0020] Please refer toFigure 1 and Figure 2 , an automatic blank discharging device for a stamping die in the figure, comprising a die base 1, a lower die 2 fixedly connected to the top of the die base 1, a top plate 6 arranged above the lower die 2, four equally spaced hydraulic rods 7 fixedly connected between the top plate 6 and the die base 1, a support frame 8 fixedly connected to the top of the die base 1 and in contact with the outside of the top plate 6, two symmetrically distributed slide rods 9 fixedly connected between the inner side of the support frame 8 and the die base 1, the surface of the slide rod 9 being provided with bumps and in contact with the top of the top plate 6 to provide a limit for the top plate 6, the slide rod 9 passing through the surface of the top plate 6, a first spring 10 being sleeved on the outside of the slide rod 9 and fixed between the top plate 6 and the die base 1, an upper die 11 fixedly connected to the bottom of the top plate 6, when the hydraulic rod 7 is activated, pulling the top plate 6 to move downward along the inner side of the support frame 8, so that the upper die 11 abuts against the lower die 2, and providing a buffer for the upper die 11 through the first spring 10, four annularly distributed side clamping mechanisms 3 for positioning the stamping parts are arranged outside the lower die 2; a blank ejecting mechanism 4 for automatically discharging the stamping parts on the surface of the lower die 2, the blank ejecting mechanism 4 being installed inside the lower die 2, and a lifting mechanism 5 for facilitating material taking is further arranged inside the lower die 2.

[0021] Please refer to Figures 2 - 6, in the illustration, the side clamping mechanism 3 includes two positioning brackets 301 symmetrically installed on the outer side of the lower die 2. The bottom of the positioning bracket 301 is fixed to the top of the die base 1. A push bar 302 is provided between the two positioning brackets 301. An installation groove 303 for the push bar 302 to slide with limited displacement is formed on the outer side of the lower die 2. A limiting plate 304 is fixedly connected to the top of the positioning bracket 301. The limiting plate 304 is in contact with the outer side of the push bar 302. Two symmetrically distributed guide rods 305 are fixedly connected to one side of the push bar 302 close to the limiting plate 304. The guide rods 305 penetrate through the surface of the limiting plate 304. A limiting nut 306 is fixedly installed at one end of the guide rod 305. The limiting nut 306 and the guide rod 305 are of a detachable structure. A second spring 307 is fixedly connected between the limiting nut 306 and the limiting plate 304. The second spring 307 is sleeved on the outer side of the guide rod 305. A side pressing plate 308 is fixedly connected to the side of the push bar 302 away from the limiting plate 304. Both ends of the side pressing plate 308 are of inclined surface structures. A pressing groove 309 is formed at the top of the push bar 302. The pressing groove 309 is located between the two positioning brackets 301. A pressing bar 310 is provided above the pressing groove 309. The width of the pressing bar 310 corresponds to the width of the pressing groove 309. The pressing bar 310 is fixed to the bottom of the top plate 6. The length of the pressing bar 310 is greater than the length of the upper die 11. Both the pressing groove 309 and the pressing bar 310 are of corresponding inclined surface structures. When the hydraulic rod 7 drives the top plate 6 to move downward, the four pressing bars 310 are respectively in contact with the pressing grooves 309 on the four push bars 302. By using the inclined surfaces of the pressing bar 310 and the pressing groove 309, the push bar 302 is pushed to move along the top of the positioning bracket 301 and the installation groove 303 on the lower die 2. The push bar 302 drives the two guide rods 305 and the side pressing plate 308 to move synchronously. The side pressing plate 308 is in contact with the stamping part on the lower die 2 to position and clamp the outer side of the stamping part, prevent the stamping part from skewing, facilitate the stamping process of the upper die 11 on the stamping part, and after the stamping is completed, the pressing bar 310 moves away from the push bar 302, and the second spring 307 pulls the push bar 302 to reset, so that the side pressing plate 308 moves away from the outer side of the stamping part, facilitating the ejection of the part.

[0022] Please refer to Figures 4 - 7, in the illustration, the ejector mechanism 4 includes an installation cavity 401 formed inside the lower die 2. A limit abutting plate 402 is fixedly connected to the bottom inner wall of the installation cavity 401. Above the limit abutting plate 402, there is a movable plate 403. The movable plate 403 is a quadrilateral structure. The outer side of the movable plate 403 is in contact with the inner wall of the installation cavity 401. The outer side of the side pressing plate 308 is in contact with the outer side of the movable plate 403. The outer sides of the movable plate 403 and the side pressing plate 308 are both corresponding inclined plane structures. A number of equally spaced third springs 404 are fixedly connected between the movable plate 403 and the limit abutting plate 402. A lower pressing plate 405 for placing the stamping part is provided at the top of the movable plate 403. A number of equally spaced positioning rods 406 are fixedly connected to the bottom of the lower pressing plate 405. Through holes for the positioning rods 406 to be limited and inserted are formed on the surface of the movable plate 403. When installing the lower pressing plate 405, align the positioning rods 406 with the through holes on the movable plate 403 and install the lower pressing plate 405 on the movable plate 403. When the side pressing plate 308 moves, by using the inclined plane corresponding to the outer side of the movable plate 403 on the side pressing plate 308, the side pressing plate 308 pushes the movable plate 403 to move downward, so that the stamping part on the lower pressing plate 405 moves downward, which is convenient for the side pressing plate 308 to position the outer side of the stamping part. At the same time, the movable plate 403 compresses the third springs 404. When the side pressing plate 308 moves to the top of the movable plate 403, the four side pressing plates 308 and the lower pressing plate 405 form a space in the shape of a frame. The upper die 11 can then process the stamping part. After the stamping is completed, the second spring 307 pulls the push bar 302 to reset. After the push bar 302 moves away from the top of the movable plate 403, the third springs 404 rebound upward, pushing the movable plate 403 to move upward and pushing the stamping part upward, preventing the temperature of the stamped stamping part from becoming high and sticking to the side pressing plate 308.

[0023] Please refer to Figures 5 - 8, in the illustration, the lifting mechanism 5 includes four mounting frames 501 respectively installed on the four sides of the lower pressing plate 405. The bottom of the mounting frame 501 is on the same horizontal line as the bottom of the lower pressing plate 405. The outer side of the mounting frame 501 is of an inclined surface structure, and the inclination angle of the outer side of the mounting frame 501 is the same as the inclination angle of the side pressing plate 308. Long strip grooves 502 are obliquely arranged on both sides of the inner wall of the mounting frame 501. The included angle between the long strip groove 502 and the outer side of the mounting frame 501 is 90 degrees. A limiting sliding cylinder 503 is limitedly slidably arranged on the inner wall of the long strip groove 502. An installation rod 504 is fixedly connected between the two limiting sliding cylinders 503. A slider 505 is limitedly slidably arranged on the inner wall of the long strip groove 502. The slider 505 is in contact with the outer wall of the limiting sliding cylinder 503. A fourth spring 506 is fixedly connected to the side of the slider 505 away from the limiting sliding cylinder 503. One end of the fourth spring 506 is fixed on the inner wall of the long strip groove 502. When the side pressing plate 308 moves to the top of the movable plate 403, the inclined surface of the movable plate 403 moves along the outer side of the mounting frame 501, pushing the installation rod 504, so that the installation rod 504 drives the limiting sliding cylinder 503 to move along the inside of the long strip groove 502. The limiting sliding cylinder 503 compresses the fourth spring 506 through the slider 505. Thus, when the side pressing plate 308 moves away from the top of the movable plate 403, the fourth spring 506 pushes the installation rod 504 to reset, and the user can hold the installation rod 504 and pull out the lower pressing plate 405, facilitating the disassembly and replacement of the lower pressing plate 405.

[0024] Working principle of rapid demoulding of stamping parts: First, the user places the stamping part on the top of the lower pressing plate 405 and activates the four hydraulic rods 7. The hydraulic rods 7 pull the top plate 6 downward. The top plate 6 drives the four pressure bars 310 to contact the pressure grooves 309 on the four push bars 302 respectively. Using the inclined surfaces of the pressure bars 310 and the pressure grooves 309, the pressure bars 310 push the push bars 302 to move along the top of the positioning frame 301 and the installation grooves 303 on the lower die 2 to the outside of the stamping part. The push bars 302 drive the two guide rods 305 and the side pressing plates 308 to move synchronously. The guide rods 305 compress the second spring 307 through the limit nuts 306. The four side pressing plates 308 contact the outside of the stamping part to position and clamp the outside of the stamping part. Using the inclined surfaces corresponding to the outside of the movable plate 403 on the side pressing plates 308, when the side pressing plates 308 move, they push the movable plate 403 downward. The stamping part on the lower pressing plate 405 can move downward synchronously. At the same time, the movable plate 403 compresses the third spring 404 and contacts the limit abutting plate 402. The bottom of the side pressing plate 308 contacts the top of the movable plate 403. Thus, the four side pressing plates 308 and the lower pressing plate 405 form a space in the shape of a direction frame, so that when the upper die 11 moves downward, the stamping part is stamped. When the stamping is completed, the hydraulic rods 7 extend upward, driving the top plate 6 to reset upward. At this time, the upper pressing plate 13 moves away from the stamping part. The third spring 404 rebounds upward, pushing the movable plate 403 upward to push the stamping part upward. And the pressure bars 310 move away from the pressure grooves 309 on the push bars 302. The second spring 307 extends and resets, and pushes the guide rods 305 to reset, so that the push bars 302 drive the side pressing plates 308 to move away from the stamping part, thus achieving the effect of automatic demoulding and part ejection.

[0025] Embodiment 2

[0026] Please refer to Figure 4 and Figure 6 This embodiment further illustrates the first embodiment. The included angles at both ends of the side pressing plate 308 are both 135 degrees. Positioning ribs 12 are fixedly connected to both sides of the push bar 302. The two sides of the positioning ribs 12 are arc-shaped. One end of the positioning ribs 12 close to the lower die 2 is an inclined surface, and the inclined surface at one end of the positioning ribs 12 corresponds to the inclined surfaces at both ends of the side pressing plate 308. A sliding groove for limiting the sliding of the positioning ribs 12 is opened on the inner wall of the installation groove 303.

[0027] A upper pressing plate 13 is fixedly connected to the bottom of the upper die 11. The upper pressing plate 13 is located directly below the lower pressing plate 405. The size of the upper pressing plate 13 is the same as that of the lower pressing plate 405.

[0028] In this embodiment: when the top plate 6 moves downward, the four pressing bars 310 are respectively inserted into the pressing grooves 309 of the four pushing bars 302, pushing the pushing bars 302 to move downward in the direction of the pressing plate 405, and driving the positioning rib 12 to move along the sliding groove on the inner wall of the installation groove 303, improving the smoothness of the movement of the pushing bars 302. And when the four side pressing plates 308 are in contact, using the inclined surfaces at both ends of the side pressing plates 308, the four side pressing plates 308 are in contact with each other to form a stamping frame, and process the stamping parts on the lower pressing plate 405 together with the upper pressing plate 13.

[0029] Embodiment 3

[0030] Please refer to Figure 7 and Figure 8 This embodiment further explains other embodiments. Grooves for fixedly installing the third spring 404 are provided at the bottom of the movable plate 403 and the top of the limiting abutting plate 402. The minimum height of the contraction of the third spring 404 is less than the sum of the groove heights on the movable plate 403 and the limiting abutting plate 402.

[0031] A rubber sleeve 14 is fixedly sleeved on the outer side of the mounting rod 504. The rubber sleeve 14 is located on both sides of the inner wall of the mounting frame 501. An opening for the limiting sliding of the mounting rod 504 is provided on the outer side of the long strip groove 502, and the inclination angle of the opening corresponds to that of the long strip groove 502.

[0032] In this embodiment: when the movable plate 403 is pushed downward by the side pressing plate 308, the third spring 404 is compressed and contacts the limiting abutting plate 402, and the contracted third spring 404 is received into the grooves on the movable plate 403 and the limiting abutting plate 402. After stamping, the user can hold the rubber sleeve 14 on the mounting rod 504 to take out the lower pressing plate 405, which is convenient for taking parts and replacing the lower pressing plate 405, and is convenient for replacing or maintaining and cooling the lower pressing plate 405.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic part ejection device for a stamping die, comprising a die base (1), a lower die (2) is fixedly connected to the top of the die base (1), a top plate (6) is arranged above the lower die (2), and four equally spaced hydraulic rods (7) are fixedly connected between the top plate (6) and the die base (1), and it is characterized in that: A support frame (8) in contact with the outer side of the top plate (6) is fixedly connected to the top of the mold base (1). Two symmetrically distributed slide bars (9) are fixedly connected between the inner side of the support frame (8) and the mold base (1). The slide bars (9) penetrate through the surface of the top plate (6). A first spring (10) is sleeved on the outer side of the slide bars (9), and the first spring (10) is fixed between the top plate (6) and the mold base (1). An upper mold (11) is fixedly connected to the bottom of the top plate (6). Four side clamping mechanisms (3) distributed in a ring shape are arranged outside the lower mold (2) for positioning the stamping part. A blanking mechanism (4) is used for automatically discharging the stamping part on the surface of the lower mold (2). The blanking mechanism (4) is installed inside the lower mold (2). A lifting mechanism (5) for facilitating material taking is also arranged inside the lower mold (2).

2. The automatic workpiece discharging device for a stamping die according to claim 1, wherein: The side clamping mechanism (3) includes two positioning frames (301) symmetrically installed outside the lower mold (2). A push bar (302) is arranged between the two positioning frames (301). An installation groove (303) for limiting the sliding of the push bar (302) is formed on the outer side of the lower mold (2). A limiting plate (304) is fixedly connected to the top of the positioning frame (301). The limiting plate (304) is in contact with the outer side of the push bar (302). Two symmetrically distributed guide rods (305) are fixedly connected to one side of the push bar (302) close to the limiting plate (304). The guide rods (305) penetrate through the surface of the limiting plate (304). A limiting nut (306) is fixedly installed at one end of the guide rods (305). A second spring (307) is fixedly connected between the limiting nut (306) and the limiting plate (304). The second spring (307) is sleeved on the outer side of the guide rods (305). A side pressing plate (308) is fixedly connected to the side of the push bar (302) away from the limiting plate (304). Both ends of the side pressing plate (308) are in a slope structure. A pressing groove (309) is formed at the top of the push bar (302). A pressing bar (310) is arranged above the pressing groove (309). The pressing bar (310) is fixed to the bottom of the top plate (6). Both the pressing groove (309) and the pressing bar (310) are in corresponding slope structures.

3. The automatic part discharging device of a stamping die according to claim 2, wherein: The ejector mechanism (4) includes an installation cavity (401) formed inside the lower die (2). The bottom inner wall of the installation cavity (401) is fixedly connected with a limiting abutting plate (402). Above the limiting abutting plate (402), there is a movable plate (403). The movable plate (403) is of a quadrilateral structure. The outer side of the side pressing plate (308) is in contact with the outer side of the movable plate (403). The outer sides of both the movable plate (403) and the side pressing plate (308) are corresponding inclined plane structures. A number of equally spaced spring threes (404) are fixedly connected between the movable plate (403) and the limiting abutting plate (402). The top of the movable plate (403) is provided with a lower pressing plate (405). The bottom of the lower pressing plate (405) is fixedly connected with a number of equally spaced positioning rods (406). The surface of the movable plate (403) is provided with through holes for the positioning rods (406) to be limited and inserted.

4. The automatic part ejection device for a stamping die according to claim 3, wherein: The lifting mechanism (5) includes four mounting frames (501) respectively installed on the four side surfaces of the lower pressing plate (405). The outer side of the mounting frame (501) is of an inclined plane structure. The inclination angle of the outer side of the mounting frame (501) is the same as that of the side pressing plate (308). Long strip grooves (502) are obliquely arranged on both sides of the inner wall of the mounting frame (501). A limiting sliding cylinder (503) is limited and slid on the inner wall of the long strip groove (502). An installation rod (504) is fixedly connected between the two limiting sliding cylinders (503). A slider (505) is limited and slid on the inner wall of the long strip groove (502). The slider (505) is in contact with the outer wall of the limiting sliding cylinder (503). One side of the slider (505) away from the limiting sliding cylinder (503) is fixedly connected with a spring four (506). One end of the spring four (506) is fixed on the inner wall of the long strip groove (502).

5. The automatic part ejection device for a stamping die according to claim 2, wherein: The included angles at both ends of the side pressing plate (308) are both 135 degrees. Positioning rib strips (12) are fixedly connected to both sides of the push bar (302). A sliding groove for the positioning rib strips (12) to be limited and slid is formed on the inner wall of the installation groove (303).

6. The automatic part ejection device for a stamping die according to claim 3, wherein: The bottom of the upper die (11) is fixedly connected with an upper pressing plate (13). The upper pressing plate (13) is located directly below the lower pressing plate (405). The size of the upper pressing plate (13) is the same as that of the lower pressing plate (405).

7. The automatic part ejection device of a stamping die according to claim 3, characterized in that: Both the bottom of the movable plate (403) and the top of the limiting abutting plate (402) are provided with grooves for the spring threes (404) to be fixedly installed.

8. An automatic part ejection device for a stamping die according to claim 4, characterized in that: A rubber sleeve (14) is fixedly sleeved on the outer side of the installation rod (504). The rubber sleeve (14) is located on both sides of the inner wall of the mounting frame (501). An opening for the installation rod (504) to be limited and slid is formed on the outer side of the long strip groove (502).

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