Precise metal mold positioning guide needle

Abstract

The utility model relates to the technical field of dies, in particular to a precise metal die positioning guide needle which comprises a stripper plate, a guide needle fixedly sleeved in the stripper plate, an ejector sleeve sleeved on the outer ring surface of the guide needle, a reset spring mounted at one end of the ejector sleeve, connecting sleeves arranged on two sides of the stripper plate, and small springs arranged on the lower sides of the connecting sleeves. A large spring is installed on one side of the small spring, a limiting disc is fixedly connected to the bottom of the large spring, a limiting column is arranged on the lower side of the limiting disc, and the lower surface of the limiting column is fixedly connected with the lower die plate. The device has the beneficial effects that in the downward movement process of a guide needle, a large spring drives a limiting disc to abut against a limiting column, so that the large spring is compressed firstly, the guide needle is preliminarily buffered, along with continuous operation of the output end of stamping equipment, a connecting sleeve compresses a small spring, the small spring is compressed, the guide needle is further buffered, and the guide needle is prevented from being damaged. Therefore, rapid reciprocating friction between the guide needle and the limiting hole in the material belt is avoided, and the service life of the guide needle is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field, and specifically relates to a positioning and guiding pin for a precision metal mold. Background Art

[0002] In the production process of precision molds, sometimes precision multi-station progressive dies are used for stamping. The accuracy of the stamped products is ensured by the accuracy of the pitch (distance between stations), and the guiding accuracy of the guiding pin directly affects the pitch accuracy. Therefore, when the coaxiality or the relative position of the outer shape to the center of the product has high requirements, guiding pins should usually be set at each station in the progressive die to ensure the product accuracy.

[0003] In the prior art, the guiding pin is generally directly fixedly installed under the stripper plate. During the high-speed stamping process, due to the too fast stamping speed and the lack of a buffer structure, the guiding pin quickly reciprocates and inserts into the positioning hole of the strip. After a long time of rapid sliding insertion, the guiding pin is easily worn, which affects its positioning and guiding accuracy, and further affects the workpiece processing quality. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a positioning and guiding pin for a precision metal mold to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A positioning and guiding pin for a precision metal mold, comprising: a stripper plate, a guiding pin is fixedly sleeved inside the stripper plate, a knockout sleeve is sleeved on the outer circumferential surface of the guiding pin, and a return spring is installed at one end of the knockout sleeve.

[0006] Connection sleeves are arranged on both sides of the stripper plate, a small spring is arranged on the lower side of the connection sleeve, a large spring is installed on one side of the small spring, the bottom of the large spring is fixedly connected with a limit disk, a limit post is arranged on the lower side of the limit disk, and the lower surface of the limit post is fixedly connected with the lower template.

[0007] Preferably, a stop plate is fixedly connected to the upper surface of the stripper plate, the upper surface of the stop plate is fixedly connected with the upper clamping plate, the upper surface of the upper clamping plate is fixedly connected with the upper backing plate, and the upper surface of the upper backing plate is fixedly connected with the upper die base.

[0008] Preferably, the knockout sleeve is slidably sleeved inside the stripper plate, one end of the return spring is fixedly connected with one end of the guiding pin, and the other end of the return spring is fixedly connected with one end of the knockout sleeve.

[0009] Preferably, the connection sleeve is slidably sleeved on the fixed rod, the upper and lower ends of the fixed rod are fixedly connected with the connection frame, and one side of the connection frame is fixedly connected with the limit frame.

[0010] Preferably, a limiting rod is fixedly connected to the top of the limiting frame. The limiting rod is slidably sleeved in the U-shaped frame. The bottom of the U-shaped frame is fixedly connected to the lower template. The large spring is fixedly connected between the limiting disc and the limiting frame.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] The upper die base is fixedly connected to the output end of the stamping equipment. When the die is closed, the stripping plate moves downward. The lower end of the guiding pin is inserted into the strip. At the same time, the ejector sleeve contacts the strip. Due to the pressure, the strip is closely attached to the lower template. When the ejector sleeve contacts the strip, the ejector sleeve compresses the return spring upward. After punching is completed, the stripping plate moves upward, driving the ejector sleeve to move upward. The return spring resets and pushes the ejector sleeve downward. The ejector sleeve will also push the strip downward. During the process of the guiding pin inserting into the positioning hole of the strip, the limiting rod slides under the limitation of the U-shaped frame, thereby increasing the movement stability of the stripping plate, improving the positioning accuracy of the guiding pin. The limiting frame first contacts the surface of the lower template, so that the limiting disc fixedly connected to the bottom of the large spring abuts against the limiting column. Furthermore, under the limiting action of the limiting column, the limiting disc compresses the large spring, thereby preliminarily and indirectly buffering the stripping plate, buffering the guiding pin, and increasing the stability of its movement. As the stamping equipment continues to move, the stripping plate will drive the connecting sleeve to slide downward on the fixed rod, so that the connecting sleeve compresses the small spring, thereby further buffering the stripping plate through the small spring, and further slowing down the speed of the guiding pin sliding and inserting into the positioning hole of the strip. Thus, through the two buffering actions on the guiding pin, the component slows down the movement speed of the guiding pin, avoids the rapid wear of the guiding pin, and improves the positioning accuracy of the guiding pin, thereby improving the quality of the workpiece. Description of the Drawings

[0013] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 is a schematic side view of the overall structure of the utility model;

[0015] Figure 3 is a schematic bottom view of the internal structure of the utility model;

[0016] Figure 4 is a schematic side view of the internal structure of the utility model.

[0017] In the figure: 1. Stripping plate; 2. Guiding pin; 3. Ejector sleeve; 4. Return spring; 5. Connecting sleeve; 6. Small spring; 7. Large spring; 8. Limiting disc; 9. Limiting column; 10. Lower template; 11. Stop baffle;

[0018] 12. Upper clamping plate; 13. Upper backing plate; 14. Upper die base; 15. Fixed rod; 16. Connecting frame; 17. Limiting frame; 18. Limiting rod; 19. U-shaped frame. Detailed implementation mode

[0019] In order to clearly and completely describe the purpose and technical solution of the present utility model and make the advantages more clearly understood, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present utility model, rather than all of the embodiments, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0020] Embodiment 1: Please refer to Figures 1 - 4 , the present utility model provides a technical solution: a precision metal mold positioning and guiding pin, including: a stripper plate 1, a guiding pin 2 is fixedly sleeved inside the stripper plate 1, a knockout sleeve 3 is sleeved on the outer circumferential surface of the guiding pin 2, a return spring 4 is installed at one end of the knockout sleeve 3, connecting sleeves 5 are arranged on both sides of the stripper plate 1, a small spring 6 is arranged below the connecting sleeve 5, a large spring 7 is installed on one side of the small spring 6, the bottom of the large spring 7 is fixedly connected with a limit disc 8, a limit post 9 is arranged below the limit disc 8, and the lower surface of the limit post 9 is fixedly connected with a lower template 10.

[0021] The upper die base 14 is fixedly connected to the output end of the stamping equipment. When the mold is closed, the stripper plate 1 moves downward, the lower end of the guiding pin 2 is inserted into the strip, and at the same time, the knockout sleeve 3 contacts the strip. Due to the pressure, the strip is closely attached to the lower template 10. When the knockout sleeve 3 contacts the strip, the knockout sleeve 3 compresses the return spring 4 upward. After punching, the stripper plate 1 moves upward, driving the knockout sleeve 3 to move upward, and the return spring 4 resets to push the knockout sleeve 3 downward, and the knockout sleeve 3 will also push the strip downward at the same time. During this movement process, first, the large spring 7 drives the limit disc 8 to abut against the limit post 9, so that the large spring 7 is first compressed, thereby initially buffering the guiding pin 2 and increasing the stability of the movement of the guiding pin 2. As the output end of the stamping equipment continues to operate, the connecting sleeve 5 compresses the small spring 6, and through the compression of the small spring 6, the guiding pin 2 is further buffered, thereby avoiding the rapid reciprocating friction between the guiding pin 2 and the upper limit hole of the strip, which affects its accuracy, and further improving the service life of the guiding pin 2.

[0022] Embodiment 2: On the basis of Embodiment 1, a stop plate 11 is fixedly connected to the upper surface of the stripping plate 1. The upper surface of the stop plate 11 is fixedly connected to the upper clamping plate 12. The upper surface of the upper clamping plate 12 is fixedly connected to the upper backing plate 13. The upper surface of the upper backing plate 13 is fixedly connected to the upper die base 14. Through the fixed connections between the stripping plate 1, the stop plate 11, the upper clamping plate 12, the upper backing plate 13, and the upper die base 14, the upper die is formed. The upper surface of the upper die base 14 is fixedly connected to the output end of the stamping equipment, so as to facilitate indirectly driving the movement of the stripping plate 1 by driving the upper die base 14. The ejector sleeve 3 is slidably sleeved in the stripping plate 1. One end of the return spring 4 is fixedly connected to one end of the pilot pin 2, and the other end of the return spring 4 is fixedly connected to one end of the ejector sleeve 3. The inner circumferential surface of the ejector sleeve 3 is sleeved on the outer circumference of the pilot pin 2 and is slidably connected thereto. The outer circumferential surface of the ejector sleeve 3 is slidably sleeved in the stripping plate 1. The ejector sleeve 3 and the pilot pin 2 are fixedly connected by the return spring 4.

[0023] The upper die base 14 is fixedly connected to the output end of the stamping equipment, so as to facilitate indirectly driving the up and down movement of the stripping plate 1 by driving the upper die base 14. When the die is closed, the stripping plate 1 moves downward, and the lower end of the pilot pin 2 is inserted into the strip. At the same time, the ejector sleeve 3 contacts the strip. Due to the pressure, the strip is closely attached to the lower template 10. When the ejector sleeve 3 contacts the strip, the ejector sleeve 3 compresses the return spring 4 upward. After punching is completed, the stripping plate 1 moves upward, driving the ejector sleeve 3 to move upward. The return spring 4 resets and pushes the ejector sleeve 3 downward, and the ejector sleeve 3 will simultaneously push the strip downward.

[0024] Embodiment 3: On the basis of Embodiment 2, the connecting sleeve 5 is slidably sleeved on the fixed rod 15. The upper and lower ends of the fixed rod 15 are fixedly connected to the connecting frame 16. One side of the connecting frame 16 is fixedly connected to the limiting frame 17. The fixed rod 15 is fixedly installed in the connecting frame 16. The small spring 6 is sleeved on the outer circumferential surface of the fixed rod 15. The fixed rod 15 limits the sliding of the connecting sleeve 5. There are two connecting frames 16 and limiting frames 17, which are symmetrically arranged about the central plane of the lower template 10. The top of the limiting frame 17 is fixedly connected to the limiting rod 18. The limiting rod 18 is slidably sleeved in the U-shaped frame 19. The bottom of the U-shaped frame 19 is fixedly connected to the lower template 10. The large spring 7 is fixedly connected between the limiting disc 8 and the limiting frame 17. The limiting rod 18 is slidably sleeved in the U-shaped frame 19. The U-shaped frame 19 limits the sliding of the limiting rod 18, thereby indirectly ensuring the stability of the movement of the upper die base 14.

[0025] During the insertion of the guiding pin 2 into the positioning hole of the strip 2, the limiting rod 18 slides under the limitation of the U-shaped frame 19, thereby increasing the smoothness of the movement of the stripper plate 1, thus improving the positioning accuracy of the guiding pin 2. The limiting frame 17 first contacts the surface of the lower template 10, so that the limiting disc 8 fixedly connected to the bottom of the large spring 7 abuts against the limiting column 9. Furthermore, under the limiting action of the limiting column 9, the limiting disc 8 compresses the large spring 7, thereby preliminarily and indirectly buffering the stripper plate 1, thus buffering the guiding pin 2 and increasing the stability of its movement. As the stamping equipment continues to move, the stripper plate 1 will drive the connecting sleeve 5 to slide downward on the fixed rod 15, so that the connecting sleeve 5 compresses the small spring 6, thereby further buffering the stripper plate 1 through the small spring 6, and further slowing down the speed of the guiding pin 2 sliding and inserting into the positioning hole on the strip. Thus, through the two buffering actions on the guiding pin, the component slows down the movement speed of the guiding pin 2, avoids the rapid wear of the guiding pin 2, and at the same time improves the positioning accuracy of the guiding pin 2, thereby improving the quality of the workpiece.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precision metal mold positioning guide needle, comprising a stripper plate (1), characterized in that: The stripping plate (1) is provided with a guide needle (2) in the inner fixed sleeve, the guide needle (2) is provided with a material ejection sleeve (3) on the outer ring surface, and a return spring (4) is installed at one end of the material ejection sleeve (3); Connecting sleeves (5) are arranged on both sides of the stripping plate (1), a small spring (6) is arranged on the lower side of the connecting sleeve (5), a large spring (7) is installed on one side of the small spring (6), a limiting plate (8) is fixedly connected to the bottom of the large spring (7), a limiting column (9) is arranged on the lower side of the limiting plate (8), and the lower surface of the limiting column (9) is fixedly connected to the lower template (10).

2. A precision metal mold positioning guide needle according to claim 1, characterized in that: The upper surface of the stripping plate (1) is fixedly connected to a stop plate (11), the upper surface of the stop plate (11) is fixedly connected to an upper clamping plate (12), the upper surface of the upper clamping plate (12) is fixedly connected to an upper pad (13), and the upper surface of the upper pad (13) is fixedly connected to an upper die seat (14).

3. A precision metal mold positioning guide needle according to claim 2, characterized in that: The ejecting sleeve (3) is slidably sleeved in the stripping plate (1), one end of the return spring (4) is fixedly connected to one end of the guide needle (2), and the other end of the return spring (4) is fixedly connected to one end of the ejecting sleeve (3).

4. A precision metal mold positioning guide needle according to claim 3, characterized in that: The connecting sleeve (5) is slidably mounted on the fixing rod (15), the upper and lower ends of the fixing rod (15) are fixedly connected to the connecting frame (16), and one side of the connecting frame (16) is fixedly connected to the limiting frame (17).

5. A precision metal mold positioning guide needle according to claim 4, characterized in that: The top of the limit frame (17) is fixedly connected to a limit rod (18), the limit rod (18) is slidably sleeved in a U-shaped frame (19), the bottom of the U-shaped frame (19) is fixedly connected to the lower template (10), and the large spring (7) is fixedly connected between the limit plate (8) and the limit frame (17).

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