Punching device for rubber gasket processing

Abstract

This utility model discloses a punching device for processing rubber gaskets, including an upper die base and a lower die base. A cylindrical blanking punch is installed at the bottom of the upper die base, and a blanking die is embedded on the upper side of the lower die base. A cylindrical punching punch is installed in the lower die base, located in the cavity of the blanking die and coaxial with it. A sliding stripper block a is installed between the blanking die and the punching punch. A spring a is installed at the bottom of the stripper block a to apply an upward pushing force to it. The blanking punch has a cylindrical structure, and the lower inner cavity forms the punching die. A sliding stripper block b is installed in the punching die, and the stripper block b is pushed downward by the spring b on its back. A sliding clamping sleeve is installed at the lower part of the blanking punch. Using rubber sheet as raw material, blanking separation and punching are achieved in one punching operation. During the punching process, the clamping sleeve is used to clamp the material, reducing punching deformation and improving processing accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of gasket processing equipment, specifically a punching device for processing rubber gaskets. Background Technology

[0002] Blanking is a process that uses the cutting edge of a die to shear and separate sheet metal along a specific contour line. Blanking accounts for the largest proportion of stamping production. Rubber gaskets are annular, and blanking from rubber sheet offers advantages such as high efficiency and high precision. A search revealed a Chinese utility model patent (CN220162657U) that discloses a rubber gasket blanking device. A rubber block is placed on a lower die base, which is then advanced along a sliding guide until it reaches a limit block. The press handle is rotated, pressing down the outer and inner punches. After the limit block reaches the lower die base, the blanking is complete. The lower die base is then ejected, and the rubber gasket is removed. This method enables the direct blanking and forming of non-standard sized, small-batch rubber gaskets, effectively reducing manufacturing costs. However, the above solution also has the following drawbacks: the lower die base needs to be ejected after each blanking operation to remove the rubber gasket, affecting blanking efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a punching device for processing rubber gaskets, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a punching device for processing rubber gaskets, comprising an upper die base and a lower die base. At least two sets of guide rods are provided on the lower side of the upper die base, and guide sleeves are installed on the lower die base. The guide rods and guide sleeves are fitted and inserted into each other in a corresponding manner. A cylindrical blanking punch is installed at the bottom of the upper die base, and a blanking die is embedded on the upper side of the lower die base. A cylindrical punching punch is installed in the lower die base, and the punching punch is located in the cavity of the blanking die and is coaxial with it. The blanking die and the punching punch are connected... The blanking punch is equipped with a sliding stripper block a, and a spring a is provided at the bottom of the stripper block a to apply an upward pushing force to it. The blanking punch has a cylindrical structure and the lower inner cavity forms a punching die. The punching die is equipped with a sliding stripper block b, and the stripper block b is pushed downward by the spring b on its back. The lower part of the blanking punch is equipped with a sliding clamping sleeve, and a spring c is provided between the flange at the lower end of the clamping sleeve and the upper die base. The lower port of the blanking punch and the upper port of the punching punch are both provided with annular cutting edges.

[0005] Preferably, the bottom outer side of the unloading block a is provided with a step with an increased diameter, and the step is used to constrain the upward movement of the unloading block a.

[0006] Preferably, the inner cavity of the blanking punch is provided with an annular flange, and a round rod is fixedly installed on the upper side of the unloading block b. The round rod passes through the round hole in the flange and is adapted to slide and connect with it. The upper end of the round rod is provided with an external thread and a limit nut is screwed on it. The spring b is disposed between the flange and the unloading block b.

[0007] Preferably, the blanking punch has two sets of guide grooves along its length on its outer side, and the clamping sleeve is screwed with a radial pin, the front end of which abuts against the guide groove.

[0008] Compared with the prior art, the beneficial effects of this utility model are: This utility model uses rubber sheet as raw material, and achieves blanking separation and punching through one punching. After punching, the gasket is directly ejected from the die cavity, which has high forming efficiency. Moreover, during the punching process, it is first pressed by the clamping sleeve to reduce punching deformation and improve processing accuracy. Attached Figure Description

[0009] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0010] Figure 2 This is a schematic diagram of the installation structure of the clamping sleeve and the blanking punch.

[0011] In the diagram: 1. Upper die holder; 2. Lower die holder; 3. Blanking punch; 4. Blanking die; 5. Punching die; 6. Punching punch; 7. Stripper block b; 8. Stripper block a; 9. Spring b; 10. Round rod; 11. Spring a; 12. Clamping sleeve; 13. Spring c; 14. Guide groove; 15. Pin. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0013] Please see Figure 1-2This utility model provides a technical solution: a punching device for processing rubber gaskets, including an upper die base 1 and a lower die base 2. At least two sets of guide rods are provided on the lower side of the upper die base 1, and guide sleeves are installed on the lower die base 2. The guide rods and guide sleeves are fitted and inserted into each other in a corresponding manner. A cylindrical blanking punch 3 is installed at the bottom of the upper die base 1, and a blanking die 4 is embedded on the upper side of the lower die base 2. A cylindrical punching punch 6 is installed in the lower die base 2. The punching punch 6 is located in the cavity of the blanking die 4 and is coaxial with it. The lower end of the blanking punch 3 and the upper end of the punching punch 6 are both provided with annular cutting edges, which are used to separate the gaskets. A stripper block a8 that can slide up and down is installed between the blanking die 4 and the punching punch 6. The bottom outer side of the stripper block a8 is provided with a step with an increased diameter. The step is used to constrain the upward movement of the stripper block a8. A spring a11 is provided at the bottom of the stripper block a8 to apply an upward pushing force to it. The stripper block a8 is used to push the stamped shim out of the blanking die 4.

[0014] The blanking punch 3 has a cylindrical structure, and its lower inner cavity forms a punching die 5. A sliding stripper block b7 is provided in the punching die 5. The stripper block b7 is pushed downwards by a spring b9 on its back. The stripper block b7 is used to eject the blanking sheet from the punching die 5. The inner cavity of the blanking punch 3 has an annular flange. A round rod 10 is fixedly installed on the upper side of the stripper block b7. The round rod 10 passes through a round hole in the flange and slides with it. The upper end of the round rod 10 has an external thread and is screwed with a limit nut. The spring b9 is located between the flange and the stripper block b7. A sliding clamping sleeve 12 is installed at the lower part of the blanking punch 3. A spring c13 is provided between the flange at the lower end of the clamping sleeve 12 and the upper die base 1. The clamping sleeve 12 is used to clamp the sheet metal before the punching die is closed. The blanking punch 3 has two sets of guide grooves 14 along the length direction on its outer side. The clamping sleeve 12 is screwed with radial pins 15. The front end of the pins 15 abuts in the guide grooves 14. The pins 15 play a role in limiting and guiding the up and down movement of the clamping sleeve 12.

[0015] Working Principle: This device is installed on a press and uses a long strip of rubber sheet as the blank. After the upper die holder 1 moves down, the lower end of the blanking punch 3 gradually inserts into the blanking die 4, causing the outer contour of the gasket to gradually separate from the blank. The stripper block a8 is pushed down to compress the spring a11. At the same time, the punching punch 6 gradually inserts into the punching die 5 to form a punch. The blanking material is ejected from the punch by the stripper block b7 and enters the punching die 5, where the spring b9 is compressed. During the above-mentioned punching and die closing process, the clamping sleeve 12 contacts the blank before the blanking punch 3 contacts it to clamp it, preventing the blank from deforming too much during the punching process and affecting the processing accuracy. When the die is separated, the formed gasket is ejected from the blanking die 4 by the stripper block a8 for easy removal, and the blanking material from the punch is ejected from the punching die 5 by the stripper block b7.

[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A punching device for processing rubber gaskets, comprising an upper die base (1) and a lower die base (2), wherein at least two sets of guide rods are provided on the lower side of the upper die base (1), and guide sleeves are installed on the lower die base (2), wherein the guide rods and guide sleeves are correspondingly matched and inserted into each other, characterized in that: A cylindrical blanking punch (3) is installed at the bottom of the upper die base (1), and a blanking die (4) is embedded on the upper side of the lower die base (2). A cylindrical punch (6) is installed in the lower die base (2). The punch (6) is located in the cavity of the blanking die (4) and is coaxial with it. A sliding stripper block a (8) is installed between the blanking die (4) and the punch (6). A spring a (11) is provided at the bottom of the stripper block a (8) to apply an upward pushing force to it. 3) It is a cylindrical structure with a punching die (5) in the lower inner cavity. The punching die (5) is provided with a stripper block b (7) that can slide up and down. The stripper block b (7) is pushed downward by a spring b (9) on its back. The lower part of the blanking punch (3) is equipped with a pressing sleeve (12) that can slide up and down. A spring c (13) is provided between the flange at the lower end of the pressing sleeve (12) and the upper die base (1). The lower port of the blanking punch (3) and the upper port of the punching punch (6) are both provided with annular cutting edges.

2. The rubber gasket processing blanking device according to claim 1, characterized by: The bottom outer side of the unloading block a(8) is provided with a step with an increased diameter, which is used to constrain the upward movement of the unloading block a(8).

3. The rubber gasket processing blanking device according to claim 1, characterized by: The inner cavity of the blanking punch (3) is provided with an annular flange. A round rod (10) is fixedly installed on the upper side of the unloading block b (7). The round rod (10) passes through the round hole in the flange and is adapted to slide and connect with it. The upper end of the round rod (10) is provided with an external thread and a limit nut is screwed on it. The spring b (9) is set between the flange and the unloading block b (7).

4. The rubber gasket processing blanking device according to claim 1, characterized by: The blanking punch (3) has two sets of guide grooves (14) along the length direction on its outer side. The clamping sleeve (12) is screwed with a radial pin (15), and the front end of the pin (15) abuts against the guide groove (14).

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