Ejector pin mechanism for stamping die

Abstract

The utility model belongs to the technical field of stamping processing, and particularly relates to an ejector pin mechanism for a stamping die, which comprises a support frame, a demolding mechanism is arranged at the bottom end of the inner side of the supporting frame, an air inlet mechanism is connected to one side of the demolding mechanism, a transmission mechanism is arranged on the top side of the supporting frame, the demolding mechanism comprises a lower mold, a piston is slidably installed on the inner side of a sliding groove, an ejector rod is fixed to the top side of the piston, and a through hole is formed in the inner side of the ejector rod. An exhaust hole is formed in the circumferential face of the top side of the ejector rod, a first spring is fixedly connected between the top side of the piston and the top end of the inner side of the sliding groove, an air guide pipe is connected to the circumferential face of the top side of the air cylinder, and a round rod is slidably installed on the inner side of the air cylinder. At the moment, air is introduced into the inner side of the lower mold through the exhaust hole, so that the machined part is separated from the lower mold, demolding is completed, and the problem that the machined part is damaged due to stress during demolding is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping processing, in particular to a thimble mechanism for a stamping die. Background Art

[0002] Stamping is a forming processing method that applies pressure to raw materials such as sheets, pipes, and profiles to cause plastic deformation, so as to obtain the required shape or size. Due to its high processing efficiency, stamping processing is widely used in industrial production.

[0003] A thimble mechanism for a stamping die with the publication number of CN216828361U has a support table as the main body. A female die is installed on the top side of the support table. Slide plates are symmetrically installed inside the female die and are slidably connected to the female die. Transmission rods are fixed in the middle of the two slide plates on both sides, and a connecting plate is fixedly connected between the two transmission rods on both sides. A thimble is fixed on the top side of the connecting plate. A third spring is sleeved on the transmission rod. A male die is arranged on the top side of the female die. Pressing rods are symmetrically fixed on the bottom side of the male die. A plug rod is fixed at the bottom end of the pressing rod. A clamping block is slidably installed inside the plug rod. A second spring is installed on the side of the clamping block inside the plug rod. A locking mechanism is arranged inside the transmission rod. Through this structure, the thimble can automatically eject the processed part after the stamping processing is completed, so as to facilitate the demoulding and taking out of the workpiece, and is more convenient for the operator to use.

[0004] There are still problems in the above-mentioned thimble mechanism for a stamping die. The contact area between the thimble and the processed part is small. When the processed part adheres to the mold, the pressure at the contact position between the thimble and the processed part is large, resulting in the processed part being damaged by force and cracking. Therefore, a thimble mechanism for a stamping die is proposed. Summary of the Utility Model

[0005] In order to make up for the deficiencies of the prior art, for the problem that in the thimble mechanism for a stamping die on the market, the contact area between the thimble and the processed part is small, and when the processed part adheres to the mold, the pressure at the contact position between the thimble and the processed part is large, resulting in the processed part being damaged by force and cracking, the utility model proposes a thimble mechanism for a stamping die.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: A thimble mechanism for a stamping die according to the utility model includes a support frame; a demoulding mechanism is arranged at the bottom end inside the support frame, an air intake mechanism is connected to one side of the demoulding mechanism, a transmission mechanism is arranged on the top side of the support frame, a support plate is fixed at the bottom end inside the support frame, and a lower die is fixed on the top side of the support plate.

[0007] Preferably, the demoulding mechanism comprises a lower mould, a chute is formed inside the lower mould, a piston is slidably mounted inside the chute, a ejector rod is fixed to the top side of the piston, a through hole is formed inside the ejector rod, exhaust holes are formed on the circumferential surface of the top side of the ejector rod, and the exhaust holes communicate with the inner cavity of the ejector rod. A first spring is fixedly connected between the top side of the piston and the top end inside the chute. A cylinder is fixed to the bottom side of the lower mould. An air duct is connected to the circumferential surface of the top side of the cylinder, and both ends of the air duct communicate with the inside of the chute respectively. A round rod is slidably mounted inside the cylinder. Limiting rods are slidably mounted on both sides of the lower mould. The bottom end of the limiting rod is fixedly connected to the bottom end of the round rod. An upper mould is fixed to the top end of the limiting rod, and the upper mould is slidably mounted on the top end inside the support frame. A sealing ring is fixed at the position where the inside of the lower mould contacts the ejector rod. By using the cylinder and the ejector rod in cooperation, after stamping is completed, while the ejector rod jacks up the workpiece, air is inflated into the mould to promote the demoulding of the workpiece and prevent it from being broken during demoulding.

[0008] Preferably, the air intake mechanism comprises a cylinder, an air inlet pipe is fixedly connected to the circumferential surface of the top side of the cylinder, and the air inlet pipe communicates with the inside of the cylinder. A limiting block is fixed on the circumferential surface inside the air inlet pipe. A clamping block is slidably mounted at one end inside the air inlet pipe. A second spring is fixedly connected between the clamping block and the limiting block. A hydraulic cylinder is fixed to the top side of the support frame. Using a spring, the structure is simple and the cost is low. It has good elasticity, can push an object to move through its own elastic force, and is not easily damaged within the elastic limit.

[0009] Preferably, the transmission mechanism comprises a hydraulic cylinder, a hydraulic rod is slidably mounted inside the hydraulic cylinder, the bottom end of the hydraulic rod passes through the support frame and is fixedly connected to the upper mould, and the hydraulic rod is slidably connected to the support frame. Positioning rods are fixed at the four corners of the bottom side of the upper mould, and positioning holes are formed at the four corners of the top side of the lower mould. Using a hydraulic cylinder can bear a large load and can push the mould to carry out stamping processing on various materials.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1. Through the structural design of a thimble mechanism for a stamping die, by setting a demoulding mechanism, when demoulding, the upper mould and the lower mould are separated. At this time, the upper mould pushes the round rod to contract through the limiting rod, so that the air inside the cylinder is introduced into the chute, pushing the piston to rise and the ejector rod to jack up. At this time, the air enters the inner cavity of the ejector rod through the through hole and is introduced into the lower mould through the exhaust hole, so as to promote the separation of the workpiece from the lower mould and prevent the workpiece from being damaged by force. After demoulding is completed, the air inside the chute is discharged, and the first spring pulls the ejector rod to reset through its own elastic force, solving the problem that the workpiece is damaged by force during demoulding.

[0012] 2. Through the structural design of a thimble mechanism for a stamping die, by setting an air intake mechanism, when the workpiece is placed inside the die and the die is closed, the upper die moves downward, thereby driving the round rod to extend through the limit rod. At this time, the air cylinder inhales air from one end of the air inlet pipe, and under the action of pressure, the air pushes the block to slide in the air inlet pipe towards the limit block, and compresses the second spring. When demolding, the second spring uses its own elastic force to push the block to be buckled at the air inlet end of the air inlet pipe to prevent air from being discharged from the air inlet pipe, thereby realizing the function of automatic demolding during the stamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic three-dimensional front view of the overall structure;

[0015] Figure 2 It is a schematic sectional view of the main three-dimensional structure of the demolding mechanism;

[0016] Figure 3 It is a schematic three-dimensional front view of the air intake mechanism;

[0017] Figure 4 It is a schematic sectional view of the side three-dimensional structure of the transmission mechanism;

[0018] Figure 5 It is a schematic three-dimensional bottom view of the overall structure.

[0019] In the figure: 1, support frame; 2, support plate; 3, lower die; 4, chute; 5, piston; 6, ejector rod; 61, through hole; 7, exhaust hole; 8, sealing ring; 9, first spring; 10, air cylinder; 11, round rod; 12, air duct; 13, upper die; 14, limit rod; 15, air inlet pipe; 16, limit block; 17, block; 18, second spring; 19, hydraulic cylinder; 20, hydraulic rod; 21, positioning rod; 22, positioning hole; 23, filter screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] Please refer to Figures 1-4 As shown in the figure, a thimble mechanism for a stamping die includes a support frame 1; a demolding mechanism is provided at the inner bottom end of the support frame 1, an air intake mechanism is connected to one side of the demolding mechanism, a transmission mechanism is provided at the top side of the support frame 1, a support plate 2 is fixed to the inner bottom end of the support frame 1, and a lower die 3 is fixed to the top side of the support plate 2;

[0022] Please refer to Figure 2 As shown in the figure, the demolding mechanism includes a lower die 3. A chute 4 is opened inside the lower die 3. A piston 5 is slidably installed inside the chute 4. A thimble 6 is fixed to the top side of the piston 5. A through hole 61 is opened inside the thimble 6. Exhaust holes 7 are opened on the circumferential surface of the top side of the thimble 6, and the exhaust holes 7 are communicated with the inner cavity of the thimble 6. A first spring 9 is fixedly connected between the top side of the piston 5 and the inner top end of the chute 4. A cylinder 10 is fixed to the bottom side of the lower die 3. An air guide pipe 12 is connected to the circumferential surface of the top side of the cylinder 10, and both ends of the air guide pipe 12 are communicated with the inside of the chute 4 respectively. A round rod 11 is slidably installed inside the cylinder 10. Limiting rods 14 are slidably installed on both sides of the lower die 3. The bottom end of the limiting rod 14 is fixedly connected to the bottom end of the round rod 11. An upper die 13 is fixed to the top end of the limiting rod 14, and the upper die 13 is slidably installed at the inner top end of the support frame 1. A sealing ring 8 is fixed at the position where the inside of the lower die 3 contacts the thimble 6. During operation, when there is a problem that the workpiece adheres to the mold and the pressure at the contact position between the thimble and the workpiece is relatively large, resulting in the workpiece being damaged by force and cracking, through the structure of the demolding mechanism, when demolding, the upper die 13 and the lower die 3 are separated. At this time, the upper die 13 pushes the round rod 11 to contract through the limiting rod 14, so that the air inside the cylinder 10 is introduced into the inside of the chute 4, pushing the piston 5 to rise, causing the thimble 6 to lift. At this time, the air enters the inner cavity of the thimble 6 through the through hole 61 and is introduced into the inside of the lower die 3 through the exhaust holes 7, so as to separate the workpiece from the lower die 3, prevent the workpiece from being damaged by force, and after the demolding is completed, the air inside the chute 4 is discharged, and the first spring 9 pulls the thimble 6 to reset by its own elastic force.

[0023] Please refer to Figure 3As shown in the figure, the intake mechanism includes a cylinder 10. A suction pipe 15 is fixedly connected to the circumferential surface on the top side of the cylinder 10, and the suction pipe 15 communicates with the inside of the cylinder 10. A limiting block 16 is fixed on the circumferential surface inside the suction pipe 15. A clamping block 17 is slidably installed at one end inside the suction pipe 15. A second spring 18 is fixedly connected between the clamping block 17 and the limiting block 16. A hydraulic cylinder 19 is fixed on the top side of the support frame 1. During operation, when encountering the problem of low demolding efficiency, through the structure of the intake mechanism, when placing the workpiece inside the mold and closing the mold, the upper mold 13 moves downward, thereby driving the round rod 11 to extend through the limiting rod 14. At this time, the cylinder 10 sucks air from one end of the suction pipe 15, and under the action of pressure, the air pushes the clamping block 17 to slide in the suction pipe 15 towards the limiting block 16, and compresses the second spring 18. During demolding, the second spring 18 uses its own elastic force to push the clamping block 17 to be buckled at the air inlet end of the suction pipe 15 to prevent air from being discharged from the suction pipe 15, thereby realizing the function of automatic demolding during the stamping process.

[0024] Please refer to Figure 4 As shown in the figure, the transmission mechanism includes a hydraulic cylinder 19. A hydraulic rod 20 is slidably installed inside the hydraulic cylinder 19. The bottom end of the hydraulic rod 20 passes through the support frame 1 and is fixedly connected to the upper mold 13, and the hydraulic rod 20 is slidably connected to the support frame 1. Four corners on the bottom side of the upper mold 13 are fixedly provided with positioning rods 21. Four corners on the top side of the lower mold 3 are provided with positioning holes 22. During operation, when encountering the problem of low stamping efficiency of the workpiece, through the structure of the transmission mechanism, place the workpiece inside the lower mold 3, control the hydraulic cylinder 19 to extend the hydraulic rod 20 inside it, thereby pushing the upper mold 13 to move towards the lower mold 3 to perform stamping on the workpiece inside it. After completing the stamping, control the hydraulic cylinder 19 to drive the upper mold 13 to rise and take out the workpiece to complete the stamping. At the same time, during the process of the upper mold 13 rising and falling, with the cooperation of the limiting rod 14, power will be provided for the demolding mechanism to realize the function of automatic demolding.

[0025] Please refer to Figure 5 As shown in the figure, a filter screen 23 is buckled at one end of the suction pipe 15. During operation, when encountering the problem that the suction pipe 15 is blocked, resulting in the mold being unable to demold normally, through the structure of the filter screen 23, impurities in the air inhaled by the suction pipe 15 are filtered out to ensure that the suction pipe 15 can be used normally, and at the same time, it is convenient for subsequent maintenance and cleaning.

[0026] Working principle: Stamping is a forming process method that applies pressure to raw materials such as sheets, tubes, and profiles to cause plastic deformation, thereby obtaining the required shape or size. Due to its high processing efficiency, stamping processing is widely used in industrial production. In the existing ejector pin mechanism, the contact area between the ejector pin and the workpiece is small. When the workpiece adheres to the mold, the pressure at the contact position between the ejector pin and the workpiece is relatively large, resulting in the workpiece being damaged due to stress rupture. To solve this problem, by setting a demoulding mechanism and an air intake mechanism, the workpiece is placed inside the lower mold 3. The hydraulic cylinder 19 is controlled to extend the inner hydraulic rod 20 inside it, thereby pushing the upper mold 13 downward towards the lower mold 3 to perform stamping processing on the workpiece inside it. At this time, the upper mold 13 moves downward, driving the round rod 11 to extend through the limiting rod 14. The air cylinder 10 inhales air from one end of the air inlet pipe 15, and under the action of pressure, the air pushes the block 17 to slide towards the limiting block 16 inside the air inlet pipe 15 and compresses the second spring 18. After inhaling air, the second spring 18 uses its own elastic force to push the block 17 to be buckled at the air inlet end of the air inlet pipe 15 to prevent air from being discharged from the air inlet pipe 15. After completing the stamping processing, the hydraulic cylinder 19 is controlled to drive the upper mold 13 to rise, and the upper mold 13 is separated from the lower mold 3. At this time, the upper mold 13 pushes the round rod 11 to contract through the limiting rod 14, thereby introducing the air inside the air cylinder 10 into the inside of the chute 4, pushing the piston 5 to rise, and causing the ejector rod 6 to lift. At this time, the air enters the inner cavity of the ejector rod 6 through the through hole 61 and is introduced into the inside of the lower mold 3 through the exhaust hole 7, thereby causing the workpiece to be separated from the lower mold 3 and preventing the workpiece from being damaged due to stress. After completing the demoulding, the workpiece is taken out. At this time, the air inside the chute 4 is discharged, and the first spring 9 uses its own elastic force to pull the ejector rod 6 back to its original position, solving the problem of the workpiece being damaged due to stress during demoulding.

[0027] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0028] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An ejector mechanism for a stamping die, characterized in that: It comprises a support frame (1); a demoulding mechanism is arranged at the inner bottom end of the support frame (1); an air intake mechanism is connected to one side of the demoulding mechanism; a transmission mechanism is arranged at the top side of the support frame (1); a support plate (2) is fixed at the inner bottom end of the support frame (1); and a lower mold (3) is fixed at the top side of the support plate (2); The demoulding mechanism comprises a lower mold (3), a slide groove (4) is provided on the inner side of the lower mold (3), a piston (5) is slidably mounted on the inner side of the slide groove (4), a push rod (6) is fixed on the top side of the piston (5), a through hole (61) is provided on the inner side of the push rod (6), an exhaust hole (7) is provided on the circumferential surface of the top side of the push rod (6), and the exhaust hole (7) is communicated with the inner cavity of the push rod (6), a first spring (9) is fixedly connected between the top side of the piston (5) and the top end of the inner side of the slide groove (4), a cylinder (10) is fixed on the bottom side of the lower mold (3), an air guide pipe (12) is connected on the circumferential surface of the top side of the cylinder (10), and the two ends of the air guide pipe (12) are respectively communicated with the inner side of the slide groove (4), and a round rod (11) is slidably mounted on the inner side of the cylinder (10).

2. The ejector mechanism for a stamping die according to claim 1, characterized in that: Limiting rods (14) are slidably mounted on both sides of the lower mold (3), the bottom ends of the limiting rods (14) are fixedly connected to the bottom ends of the round rods (11), the top ends of the limiting rods (14) are fixed with an upper mold (13), and the upper mold (13) is slidably mounted on the top inner side of the support frame (1), and a sealing ring (8) is fixed at the contact position between the inner side of the lower mold (3) and the push rod (6).

3. The ejector mechanism for a stamping die according to claim 2, characterized in that: The air intake mechanism comprises a cylinder (10), an air intake pipe (15) is fixedly connected to the top circumferential surface of the cylinder (10), the air intake pipe (15) is communicated with the inner side of the cylinder (10), and a limit block (16) is fixed to the inner circumferential surface of the air intake pipe (15).

4. The ejector mechanism for a stamping die according to claim 3, characterized in that: A clamping block (17) is slidably mounted on one end of the inner side of the air intake pipe (15), a second spring (18) is fixedly connected between the clamping block (17) and the limit block (16), and a hydraulic cylinder (19) is fixed on the top side of the support frame (1).

5. The ejector mechanism for a stamping die according to claim 4, characterized in that: The transmission mechanism comprises a hydraulic cylinder (19), a hydraulic rod (20) is slidably mounted inside the hydraulic cylinder (19), the bottom end of the hydraulic rod (20) passes through the support frame (1) and is fixedly connected to the upper mold (13), and the hydraulic rod (20) is slidably connected to the support frame (1).

6. The ejector mechanism for a stamping die according to claim 5, characterized in that: Positioning rods (21) are fixed at the four corners of the bottom side of the upper mold (13), and positioning holes (22) are opened at the four corners of the top side of the lower mold (3).

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