Combined stamping knife

Abstract

The utility model discloses a combined stamping knife, which relates to the field of stamping knives and comprises a knife handle, a knife bar is fixed on the knife handle, an inner knife cylinder and an outer knife cylinder are sequentially sleeved on the outer side of the knife bar in a sliding manner, the end parts of the knife bar, the inner knife cylinder and the outer knife cylinder are provided with flush slope blades, the surface of the knife bar is provided with a positioning screw hole, and the surfaces of the inner knife cylinder and the outer knife cylinder are provided with through holes in an aligned manner. The combination mode that the inner cutter cylinder and the outer cutter cylinder are sequentially arranged on the outer portion of the cutter bar in a sleeved mode in a sliding mode is adopted, the size of the punching face at the bottom of the cutter can be selectively adjusted, the punching area can be conveniently adjusted only through the screw, the punching efficiency is improved, and the punching efficiency is improved. And the richness of the machining size of the stamping knife is improved.

Description

Technical Field

[0001] The utility model relates to the field of punching knives, in particular to a combined punching knife. Background Art

[0002] The punching knife is used to punch holes in the surface of a metal plate. By applying pressure to the punching knife, the inclined plane blade at its end punches a round hole in the surface of the metal plate part. The size of the round hole is consistent with that of the punching knife. However, the cross-sectional size of the traditional punching knife is fixed, and the processed hole diameter is also fixed. For the production requirements of punching holes with multiple sizes, the punching knife needs to be frequently replaced, resulting in low processing richness. Content of the Utility Model

[0003] The purpose of the utility model is to provide a combined punching knife, and solve the following technical problems: to meet the requirements of punching holes with multiple sizes and conveniently adjust the punching size of the punching knife.

[0004] In order to solve the problems existing in the prior art, the technical solution adopted by the utility model is as follows:

[0005] A combined punching knife includes a knife handle. A knife rod is fixed to the knife handle. An inner knife cylinder and an outer knife cylinder are sequentially sleeved on the outer side of the knife rod in a sliding manner. The ends of the knife rod, the inner knife cylinder and the outer knife cylinder have flush inclined plane blades. A positioning screw hole is formed on the surface of the knife rod. Through holes are formed on the surfaces of the inner knife cylinder and the outer knife cylinder in a corresponding manner. A screw penetrates through the through hole and is connected with the positioning screw hole to fix the knife rod, the inner knife cylinder and the outer knife cylinder into one body.

[0006] Preferably, a relief screw hole is formed above the positioning screw hole on the surface of the knife rod. The screw can pass through the through hole and be connected with the relief screw hole to fix the lifted outer knife cylinder or inner knife cylinder.

[0007] Preferably, a plurality of relief screw holes are arranged vertically.

[0008] Preferably, linear holes are formed below the through holes on the surfaces of the inner knife cylinder and the outer knife cylinder. When the through hole is aligned with the relief screw hole, the linear hole is aligned with the positioning screw hole.

[0009] Preferably, the inclination angle of the flush inclined plane blades at the ends of the knife rod, the inner knife cylinder and the outer knife cylinder is 30°-45°.

[0010] Preferably, axial extension key grooves are formed on the outer walls of the knife rod and the inner knife cylinder, and axially extending sliding keys are fixed to the inner walls of the inner knife cylinder and the outer knife cylinder. The sliding keys are slidably matched with the key grooves.

[0011] Compared with the related art, the utility model has the following beneficial effects:

[0012] The utility model adopts a combined mode in which an inner cutter barrel and an outer cutter barrel are sequentially sleeved outside the cutter bar in a sliding manner, and the punching surface size at the bottom of the cutter can be selectively adjusted. The punching area can be conveniently adjusted only by screws, and the richness of the processing dimensions that the punching cutter can process is improved. 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 diagram of the overall sectional structure of the utility model;

[0015] Figure 3 is a schematic diagram of the axial sliding adaptation structure of the cutter bar, inner cutter barrel and outer cutter barrel of the utility model.

[0016] Reference numerals: 1, cutter handle; 2, cutter bar; 3, inner cutter barrel; 4, outer cutter barrel; 5, screw; 6, relief screw hole; 7, positioning screw hole; 8, through hole; 9, linear hole; 10, keyway; 11, sliding key. Detailed Embodiment

[0017] In order to make the purpose, technical solution and advantages of the utility model clearer, the following further details the utility model in conjunction with the drawings and embodiments.

[0018] As Figure 1 , Figure 2 shown, the combined punching cutter has a cutter handle 1 and a cutter bar 2 fixedly connected axially. The cutter handle 1 is used to connect the pressing machine. An inner cutter barrel 3 and an outer cutter barrel 4 are sequentially sleeved outside the cutter bar 2 in a sliding manner. A positioning screw hole 7 is opened on the surface of the cutter bar 2. Through holes 8 are opened on the surfaces of the inner cutter barrel 3 and the outer cutter barrel 4 in alignment. A screw 5 passes through the through hole 8 and is connected with the positioning screw hole 7 to fix the cutter bar 2, the inner cutter barrel 3 and the outer cutter barrel 4 into one body. The end parts of the cutter bar 2, the inner cutter barrel 3 and the outer cutter barrel 4 have flush inclined cutting edges, and the inclination angle of the cutting edges is 30°-45°;

[0019] A relief screw hole 6 is opened on the surface of the cutter bar 2 above the positioning screw hole 7. Linear holes 9 are opened on the surfaces of the inner cutter barrel 3 and the outer cutter barrel 4 below the through hole 8. When the through hole 8 is in alignment with the relief screw hole 6, the linear hole 9 is in alignment with the positioning screw hole 7;

[0020] The cutter bar 2, the inner cutter barrel 3 and the outer cutter barrel 4 correspond to three punching sizes. When a large-size punching is required, the screw 5 passes through the through hole 8 on the surfaces of the inner cutter barrel 3 and the outer cutter barrel 4 and is threadedly connected with the positioning screw hole 7 to fix the inner cutter barrel 3, the outer cutter barrel 4 and the cutter bar 2 into one body, and keep the bottoms of the cutter bar 2, the inner cutter barrel 3 and the outer cutter barrel 4 flush to form a larger punching surface;

[0021] When medium-sized punching is required, slide the outer cutter barrel 4 upward. Use a screw 5 to threadedly connect through the through hole 8 on the surface of the outer cutter barrel 4 and the relief screw hole 6. Use another screw 5 to threadedly connect through the linear hole 9 on the surface of the outer cutter barrel 4, the through hole 8 on the surface of the inner cutter barrel 3 and the positioning screw hole 7. The cutting surface is formed by the bottom inner cutter barrel 3 and the cutter bar 2.

[0022] When small-sized punching is required, slide the inner cutter barrel 3 and the outer cutter barrel 4 upward together. Use a screw 5 to threadedly connect through the through holes 8 on the surfaces of the inner cutter barrel 3 and the outer cutter barrel 4 and the relief screw hole 6. Only the cutter bar 2 at the bottom end serves as the cutting surface.

[0023] According to specific requirements, multiple layers of cutter barrels can be continuously arranged outside the outer cutter barrel 4 to achieve more choices of punching sizes.

[0024] There are multiple relief screw holes 6 arranged vertically, and the upward lifting heights of the outer cutter barrel 4 and the inner cutter barrel 3 can be adjusted according to the punching depth.

[0025] Such as Figure 3 As shown, axial extension key grooves 10 are provided on the outer walls of the cutter bar 2 and the inner cutter barrel 3. Axial extension sliding keys 11 are fixed on the inner walls of the inner cutter barrel 3 and the outer cutter barrel 4. Through the sliding fit of the sliding keys 11 and the key grooves 10, the cutter bar 2, the inner cutter barrel 3, and the outer cutter barrel 4 can slide axially precisely, and the formed cutting surface is relatively complete.

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

Claims

1. A combined punching knife, characterized in that: include: A knife handle (1) is provided, wherein a knife rod (2) is fixed to the knife handle (1), an inner knife cylinder (3) and an outer knife cylinder (4) are slidably sleeved on the outer side of the knife rod (2) in sequence, the ends of the knife rod (2), the inner knife cylinder (3) and the outer knife cylinder (4) have flush bevel blades, a positioning screw hole (7) is provided on the surface of the knife rod (2), and through holes (8) are provided on the surfaces of the inner knife cylinder (3) and the outer knife cylinder (4) in a corresponding manner, a screw (5) passes through the through hole (8) and is connected to the positioning screw hole (7), thereby fixing the knife rod (2), the inner knife cylinder (3) and the outer knife cylinder (4) together.

2. The combined punching knife according to claim 1, characterized in that: A clearance screw hole (6) is provided on the surface of the knife rod (2) above the positioning screw hole (7), and a screw (5) can pass through the through hole (8) and connect with the clearance screw hole (6) to fix the raised outer knife cylinder (4) or the inner knife cylinder (3).

3. The combined punching knife according to claim 2, characterized in that: A plurality of the clearance screw holes (6) are arranged vertically.

4. The combined punching knife according to claim 2, characterized in that: The surfaces of the inner knife cylinder (3) and the outer knife cylinder (4) are provided with linear holes (9) below the through holes (8); when the through holes (8) are aligned with the clearance screw holes (6), the linear holes (9) are aligned with the positioning screw holes (7).

5. The combined punching knife according to claim 1, characterized in that: The inclined blades of the cutter rod (2), the inner cutter barrel (3) and the outer cutter barrel (4) are flush with each other at an inclination angle of 30° to 45°.

6. The combined punching knife according to claim 1, characterized in that: The outer walls of the knife rod (2) and the inner knife cylinder (3) are both provided with an axially extending keyway (10), and the inner walls of the inner knife cylinder (3) and the outer knife cylinder (4) are both fixed with an axially extending sliding key (11), and the sliding key (11) is slidably matched with the keyway (10).

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