Punching die

Abstract

The utility model belongs to the technical field of dies, and particularly relates to a punching die which comprises an upper die and a lower die, a first cutting edge is arranged on the upper die, a second cutting edge is arranged on the lower die and corresponds to the upper die, and a limiting groove is axially formed in the surface of the lower die. The limiting groove is axially formed in the surface of the lower mold, so that after the lower mold is installed on the mold base, a structure matched with the limiting groove is arranged on the mold base in a matched mode, the lower mold can be limited in the radial direction, the situation that the lower mold is loosened due to attempted deflection in the radial direction is avoided, and the stability of the lower mold is improved; the punching quality is improved; and the service life of the die is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and in particular relates to a punching mold. Background Art

[0002] A hydraulic tool is a tool that transmits power through liquid pressure. During operation, oil is sucked from the oil bag through a power element (usually a plunger assembly and a power source for driving the plunger assembly), and high-pressure oil is generated. This oil is then transmitted to the actuator through a closed hydraulic oil circuit. When the operation is completed, the oil fume flows back into the oil bag through the pressure relief assembly to achieve circulation. Depending on the actuator, the hydraulic tool can perform operations such as punching and cutting.

[0003] Among them, punching is a common application of hydraulic tools. Specifically, its actuators include a die base, a piston installed in the die base, an upper die and a lower die. The upper die is connected to the piston, and the piston is pushed by hydraulic oil to push the upper die toward the lower die to punch the metal sheet. The upper die and the lower die have a crucial influence on the quality of the punching.

[0004] For example, a handheld hydraulic punching machine disclosed in Chinese patent application No. (CN201420791811.3) includes a punch (i.e., an upper mold) and a lower mold sleeve (i.e., a lower mold). In this application, the lower mold is only fixed in the axial direction, and the upper mold is pushed toward the lower mold by a piston to achieve punching, but the lower mold is not limited in the radial direction. When the upper mold is pressed downward, the extrusion pressure on the lower mold increases continuously, and it is easy to deflect in the radial direction, which can easily cause the lower mold to loosen, affecting the quality of the punched holes and the alignment accuracy of the lower mold and the upper mold, and even causing damage, thereby affecting the service life. Utility Model Content

[0005] The purpose of the utility model is to provide a punching die in view of the above-mentioned technical problems, so as to achieve the effect of radially limiting the lower die during the punching process to prevent the lower die from loosening and affecting the punching quality and the service life of the die.

[0006] In view of this, the utility model provides a punching die, comprising:

[0007] The upper die is provided with a first cutting edge;

[0008] The lower die is provided with a second cutting edge and is arranged corresponding to the upper die;

[0009] Wherein, a limiting groove is axially provided on the surface of the lower mold.

[0010] In the above technical solution, further, the upper mold includes:

[0011] First subject;

[0012] The protrusion is arranged at one axial end of the first main body, and is located at two axial ends of the first main body respectively with the first cutting edge.

[0013] In the above technical solution, further:

[0014] The radial cross section of the protrusion is a non-perfect circle.

[0015] In the above technical solution, further:

[0016] The first body is axially provided with a countersunk hole, and the protrusion is axially provided with a first through hole;

[0017] The countersunk hole and the first through hole form a stepped hole, and the cross-sectional diameter of the first through hole is smaller than the cross-sectional diameter of the countersunk hole.

[0018] In the above technical solution, further:

[0019] The first cutting edge includes at least one cutting edge crest and a cutting edge valley;

[0020] The first body is in a cylindrical shape, and the blade peaks and blade valleys are alternately arranged around one end of the first body.

[0021] In the above technical solution, further:

[0022] The first body is provided with a third cutting edge along the radial direction at the highest point of the cutting edge peak;

[0023] Among them, the third cutting edge is arranged inclined.

[0024] In the above technical solution, further, the lower mold includes:

[0025] The second body is cylindrical in shape and has a second through hole in the axial direction, and an end close to the upper mold extends toward the axis to form a second cutting edge;

[0026] A cutting gap is formed between the first cutting edge and the second cutting edge along the radial surface.

[0027] The beneficial effects of the utility model are:

[0028] 1. By axially opening a limiting groove on the surface of the lower mold, after the lower mold is installed on the mold base, a structure compatible with the limiting groove is set on the mold base, so that the lower mold can be limited in the radial direction to avoid loosening due to radial deflection, thereby improving the stability of the lower mold, improving the punching quality and ensuring the service life of the mold.

[0029] 2. By setting a protrusion in the axial direction of the upper mold and setting the radial section of the protrusion to a non-circular shape, the upper mold also has a radial limiting effect, thereby ensuring the stability of the upper mold, further improving the punching quality and ensuring the service life of the mold.

[0030] 3. By setting at least one blade peak and blade valley on the first cutting edge of the upper die, the upper die and the lower die can achieve a shearing effect when they cooperate, thereby improving the punching effect and ensuring the punching quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the utility model;

[0032] Figure 2 It is a top view of the utility model;

[0033] Figure 3 It is a cross-sectional view of the utility model at AA;

[0034] The markings in the figure are as follows: 1. upper mold; 10. first cutting edge; 100. cutting edge; 101. cutting edge valley; 11. first main body; 12. protrusion; 13. countersunk hole; 14. first through hole; 15. third cutting edge; 2. lower mold; 20. second cutting edge; 21. limiting groove; 22. second main body; 23. second through hole. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0036] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] Embodiment 1:

[0038] This embodiment provides a punching die, comprising:

[0039] The upper die 1 is provided with a first cutting edge 10;

[0040] The lower mold 2 is provided with a second cutting edge 20 and is arranged corresponding to the upper mold 1;

[0041] Wherein, a limiting groove 21 is axially provided on the surface of the lower mold 2;

[0042] At the same time, the punching die is also used because it has a piston for connecting the upper die 1, a die base for installing the lower die 2, and fasteners such as bolts for connecting the upper die 1 and the piston and the lower die 2 and the die base, and a limiting member adapted to the limiting groove 21 is provided on the die base. The limiting member can be a strip protrusion 12 or other structure adapted to the limiting groove 21. The above is an adaptive setting of the punching die applied to hydraulic tools, which is a prior art and will not be repeated here.

[0043] It can be seen from this embodiment that by axially providing a limiting groove 21 on the surface of the lower mold 2, after the lower mold 2 is installed on the mold base, a structure matching the limiting groove 21 is provided on the mold base, so that the lower mold 2 can be limited in the radial direction, thereby avoiding loosening due to radial deflection, improving the stability of the lower mold 2, improving the punching quality and ensuring the service life of the mold;

[0044] At the same time, the axially arranged limiting groove 21 can improve the convenience of installing the lower mold 2 and avoid affecting the axial movement of the lower mold 2.

[0045] Embodiment 2:

[0046] This embodiment provides a punching die, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the upper die 1 includes:

[0047] A first body 11;

[0048] The protrusion 12 is provided at one axial end of the first body 11, and is located at two axial ends of the first body 11 together with the first cutting edge 10;

[0049] The protrusion 12 and the first body 11 are in an integrated structure.

[0050] It can be seen from the present embodiment that the connection strength and stability of the upper mold 1 after installation and connection can be improved by setting the protrusion 12. Specifically, in actual application, when the upper mold 1 is connected to the piston, a groove adapted to the protrusion 12 is provided on the piston. Therefore, the connection strength and stability of the upper mold 1 after installation are improved through the cooperation between the protrusion 12 and the groove.

[0051] Embodiment 3:

[0052] This embodiment provides a punching die, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0053] The radial cross section of the protrusion 12 is a non-circular shape;

[0054] The non-circular shape may be a combination of straight lines and straight lines (such as a polygon), a combination of straight lines and arcs (such as a sector), and a combination of arcs and arcs (such as an ellipse).

[0055] It can be seen from this embodiment that by setting the radial cross-section of the protrusion 12 to a non-circular shape, the upper mold 1 can be radially limited after installation, thereby preventing the upper mold 1 from attempting to deflect radially, improving the stability of the upper mold 1, further improving the quality of punching, and ensuring the service life of the punching mold.

[0056] Embodiment 4:

[0057] This embodiment provides a punching die, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0058] The first body 11 is axially provided with a counterbore 13, and the protrusion 12 is axially provided with a first through hole 14;

[0059] The counterbore 13 and the first through hole 14 form a stepped hole, and the cross-sectional diameter of the first through hole 14 is smaller than the cross-sectional diameter of the counterbore 13 .

[0060] It can be seen from the present embodiment that by opening a stepped hole in the upper mold 1, it is convenient to install and connect the upper mold 1 by bolts. The structure is simple, the operation is convenient, and the manufacturing is convenient. Specifically, in actual application, a threaded hole can be axially opened at one end of the piston, and the bolt can pass through the countersunk hole 13 and the first through hole 14 to connect with the threaded hole.

[0061] Embodiment 5:

[0062] This embodiment provides a punching die, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0063] The first cutting edge 10 comprises at least one cutting edge 100 and a cutting edge valley 101;

[0064] The first body 11 is cylindrical in shape, and the blade peaks 100 and the blade valleys 101 are alternately arranged around one end of the first body 11;

[0065] Meanwhile, the first cutting edge 10 may include three cutting crests 100 and three cutting valleys 101 .

[0066] It can be seen from the present embodiment that by configuring the first cutting edge 10 to be a plurality of cutting peaks 100 and a plurality of cutting valleys 101, and circumferentially arranging them on the first main body 11, a shearing effect can be formed during punching, thereby improving the punching effect and ensuring the punching quality. At the same time, multiple shearing intervals can be formed along the circumference to reduce deformation of the metal sheet caused by punching, avoid stress concentration, and improve the punching quality.

[0067] Embodiment 6:

[0068] This embodiment provides a punching die, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0069] The first body 11 is provided with a third cutting edge 15 along the radial direction at the highest point of the cutting edge 100;

[0070] The third cutting edge 15 is arranged at an incline.

[0071] It can be seen from the present embodiment that by radially arranging the third cutting edge 15 through the highest point of the blade peak 100 of the first main body 11 and slanting the third cutting edge 15, the highest point of the blade peak 100 forms a cutting edge, and the cross sections of the blade peak 100 and the blade valley 101 can form acute angles, thereby increasing the shear force between the upper mold 1 and the lower mold 2, improving the punching effect and ensuring the punching quality.

[0072] Embodiment 7:

[0073] This embodiment provides a punching die, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the lower die 2 includes:

[0074] The second body 22 is cylindrical in shape and has a second through hole 23 axially formed therein. An end close to the upper mold 1 extends toward the axis to form a second cutting edge 20 .

[0075] It can be seen from the present embodiment that by axially opening the second through hole 23 in the second main body 22 of the lower mold 2, it is convenient to discharge the discs produced by punching, so as to avoid affecting the subsequent punching.

[0076] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A punching die, characterized in that: include: An upper mold (1) is provided with a first cutting edge (10); The lower mold (2) is provided with a second cutting edge (20) and is arranged corresponding to the upper mold (1); Wherein, a limiting groove (21) is axially provided on the surface of the lower mold (2).

2. The punching die according to claim 1, characterized in that: The upper mold (1) comprises: First subject (11); The protrusion (12) is arranged at one axial end of the first body (11), and is located at two axial ends of the first body (11) together with the first cutting edge (10).

3. The punching die according to claim 2, characterized in that: The radial cross section of the protrusion (12) is a non-circular shape.

4. The punching die according to claim 2, characterized in that: The first body (11) is axially provided with a countersunk hole (13), and the protrusion (12) is axially provided with a first through hole (14); The counterbore (13) and the first through hole (14) form a stepped hole, and the cross-sectional diameter of the first through hole (14) is smaller than the cross-sectional diameter of the counterbore (13).

5. The punching die according to claim 2, characterized in that: The first cutting edge (10) comprises at least one cutting edge peak (100) and a cutting edge valley (101); The first body (11) is in a cylindrical shape, and the blade peaks (100) and blade valleys (101) are alternately arranged around one end of the first body (11).

6. The punching die according to claim 5, characterized in that: The first body (11) is provided with a third cutting edge (15) along the radial direction at the highest point of the cutting edge peak (100); Wherein, the third cutting edge (15) is arranged at an inclination.

7. The punching die according to claim 1, characterized in that: The lower mold (2) comprises: The second body (22) is cylindrical in shape and is provided with a second through hole (23) in the axial direction, and an end close to the upper mold (1) extends toward the axis to form the second cutting edge (20).

Images