Female die structure for preventing waste from rebounding, high-speed stamping die and high-speed stamping equipment

Abstract

The utility model provides a female die structure for preventing waste rebounding, which comprises a female die body and a blanking through hole, the blanking through hole penetrates through the female die body, the blanking through hole comprises a knife edge and a transition section which are communicated in sequence, and the inner diameter of the knife edge is gradually reduced from the transition section to the direction close to an inlet of the knife edge. The female die structure capable of preventing the waste material from rebounding can prevent the waste material from rebounding when a high-strength sheet is stamped at a high speed, and the yield of products is improved. The utility model further relates to a high-speed stamping die and high-speed stamping equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed stamping of thin materials, in particular to a concave die structure for preventing waste material from rebounding, a high-speed stamping die and a high-speed stamping device. Background Art

[0002] Traditional stamping anti-jump waste process often makes notches or convex ribs on the die to prevent waste from jumping back. With the rapid development of industry, the stamping speed is getting faster and faster, and the hole mouth is prone to accumulate waste, which increases the punching force and the wear of the hole wall. After wear, a cone shape can be formed in the hole, which makes it easy for the punched parts in the hole mouth to jump out of waste and affect normal punching. The effect of these methods cannot completely guarantee that the waste will not jump back and will form a small collapse on the surface of the product. With the increasing requirements for product precision and appearance, there are also higher requirements for production efficiency and yield rate. There is no design in the existing technology that can effectively deal with the problem of waste floating when high-strength thin steel plates are stamped at high speed, and it is impossible to effectively prevent waste from jumping, so the product yield and productivity are low. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a die structure for preventing waste from rebounding, which can prevent waste from rebounding during high-strength thin sheets being stamped at high speed, thereby improving the yield rate of products.

[0004] The utility model provides a die structure for preventing waste from rebounding, comprising a die body and a punching through hole, wherein the punching through hole runs through the die body, the punching through hole comprises a knife edge and a transition section which are connected in sequence, and the inner diameter of the knife edge gradually decreases from the transition section toward the entrance of the knife edge.

[0005] In one embodiment, the blade includes a first inner wall, which is circumferentially arranged around the axis of the blade, the transition section is straight-cylindrical, and the transition section includes a second inner wall, and the angle between the first inner wall and the second inner wall is 0.3° to 0.5°.

[0006] In one embodiment, the depth of the blade is 1.5 mm to 2.0 mm.

[0007] In one embodiment, the punching through hole further includes a blanking section, the blanking section is connected to the transition section, and the inner diameter of the blanking section gradually increases from the transition section toward a direction away from the knife edge.

[0008] In one embodiment, the blanking section includes a third inner wall, and the angle between the third inner wall and the second inner wall is 3° to 5°.

[0009] In one embodiment, the inner diameter of the blade entrance is smaller than the inner diameter of the transition section.

[0010] In one embodiment, the die body is provided with an air flow hole, the air flow hole is communicated with the punching through hole, and the air flow hole is used to destroy the negative pressure state of the punching through hole.

[0011] In one embodiment, the die body includes an upper surface, the upper surface is arranged at one end of the entrance of the blade, the air flow hole is arranged obliquely, one end of the air flow hole is connected to the blade or the transition section, and the other end of the air flow hole is arranged through the upper surface.

[0012] The utility model also relates to a high-speed stamping die, comprising an upper die and the above-mentioned concave die structure for preventing waste material from rebounding, wherein the upper die is fixedly connected with a punch, the punch is matched with the blade, and the punch is used for blanking the material.

[0013] The utility model also relates to a high-speed stamping device, comprising the high-speed stamping die mentioned above.

[0014] The utility model has a concave die structure for preventing waste from bouncing back, that is, the inner diameter of the blade gradually decreases from the transition section toward the entrance of the blade. When the punch punches the material and enters the blade of the die body, the entrance of the blade places the waste in the punching through hole, so that the waste is not easy to jump out. In addition, even if the hole wall is worn out and forms a cone shape due to the accumulation of waste on the blade, the cone shape can be reduced, thereby achieving the effect of preventing waste from jumping out, and no tiny collapse will be formed on the surface of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the top view of the concave mold structure for preventing waste from rebounding in the first embodiment of the utility model;

[0017] Figure 2 It is a schematic cross-sectional view of a concave mold structure for preventing waste from rebounding in the first embodiment of the utility model;

[0018] Figure 3 It is an enlarged structural schematic diagram of the knife edge of the concave die structure for preventing waste rebound in the first embodiment of the utility model;

[0019] Figure 4 It is a schematic cross-sectional view of a concave mold structure for preventing waste from rebounding according to a second embodiment of the utility model;

[0020] Explanation of the accompanying reference numerals: punching through hole - 101; cutting edge - 1011; transition section - 1012; blanking section - 1013; air flow hole - 102; die body - 11; upper surface - 11a; first inner wall - 111; second inner wall - 112; third inner wall - 113.

[0021] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0025] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0026] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0027] First embodiment

[0028] like Figures 1 to 3As shown, the high-speed stamping die includes an upper die and a die structure for preventing waste from rebounding. The upper die is fixedly connected with a punch, which is adapted to the blade 1011 and is used to punch the material. The die structure for preventing waste from rebounding includes a die body 11 and a punching through hole 101. The die body 11 is made of a rigid material that is not easily damaged. The punching through hole 101 is set through the die body 11. The punching through hole 101 includes a blade 1011 and a transition section 1012 that are connected in sequence. The inner diameter of the blade 1011 gradually decreases from the transition section 1012 toward the entrance of the blade 1011, that is, a reverse cone structure. The inner diameter of the entrance of the blade 1011 is smaller than the inner diameter of the transition section 1012.

[0029] The die structure for preventing waste from bouncing back of the utility model has an inverted cone structure at the blade 1011, that is, the inner diameter of the blade 1011 gradually decreases from the transition section 1012 toward the entrance of the blade 1011. When the punch shears the material and enters the blade 1011 of the die body 11, the entrance of the blade 1011 places the waste in the punching through hole 101, making it difficult for the waste to jump out. In addition, even if the hole wall is worn out and forms a cone shape due to the accumulation of waste on the blade 1011, the effect of preventing waste from bouncing back can be achieved without forming a tiny collapse on the product surface.

[0030] like Figure 2 and Figure 3 As shown, the blade 1011 includes a first inner wall 111, which is circumferentially arranged around the axis of the blade 1011, that is, the first inner wall 111 is annular, the transition section 1012 is a straight cylinder, the transition section 1012 includes a second inner wall 112, the second inner wall 112 is annular, the first inner wall 111 and the second inner wall 112 are both smooth surfaces, and the angle between the first inner wall 111 and the second inner wall 112 is 0.3°~0.5°. Preferably, the angle between the first inner wall 111 and the second inner wall 112 is 0.3°, 0.4° or 0.5°, etc.; the depth of the blade 1011 is 1.5mm~2.0mm. In this embodiment, when the thickness of the die body 11 is 10 mm, when stamping materials with a thickness of 0.3 mm or less, the total depth of the blade 1011 and the transition section 1012 is 2 mm, and the depth of the blade 1011 is 1.5 mm; when stamping materials with a thickness of 0.3 mm to 0.5 mm, the total depth of the blade 1011 and the transition section 1012 is 2.5 mm, and the depth of the blade 1011 is 2 mm.

[0031] like Figure 2As shown, the punching through hole 101 also includes a blanking section 1013, which is connected to the transition section 1012. The inner diameter of the blanking section 1013 gradually increases from the transition section 1012 to the direction away from the blade 1011, so as to facilitate the blanking of waste materials; the blanking section 1013 includes a third inner wall 113, and the angle between the third inner wall 113 and the second inner wall 112 is 3° to 5°. Preferably, the angle between the third inner wall 113 and the second inner wall 112 is 3°, 4° or 5°, etc., but is not limited thereto.

[0032] Second embodiment

[0033] like Figure 4 As shown, the structure of the concave mold for preventing waste material from rebounding in this embodiment is substantially the same as that of the concave mold for preventing waste material from rebounding in the first embodiment, except that an air flow hole 102 is provided.

[0034] Specifically, the die body 11 is provided with an air flow hole 102, which is connected to the punching through hole 101, and the air flow hole 102 is used to destroy the negative pressure state of the punching through hole 101; the die body 11 includes an upper surface 11a, and the upper surface 11a is arranged at one end of the entrance of the cutting edge 1011, the air flow hole 102 is inclined, one end of the air flow hole 102 is connected to the cutting edge 1011 or the transition section 1012, and the other end of the air flow hole 102 is arranged through the upper surface 11a; during the stamping process of the material, the waste material is squeezed into the cutting edge 1011 by the punch, at this time, the air flows into the cutting edge 1011 under the action of the air flow hole 102, and the waste material is discharged to the transition section 1012 under the action of the airflow, and a downward resistance is generated in the punching through hole 101, which increases the resistance to the waste material being pulled up, so that the waste material cannot rebound to the cutting edge 1011 and the upper surface 11a of the die body 11, thereby improving the production efficiency and yield rate of the product.

[0035] The utility model also relates to a high-speed stamping device, comprising the high-speed stamping die mentioned above.

[0036] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A die structure for preventing waste from rebounding, characterized in that: The invention comprises a die body (11) and a punching through hole (101), wherein the punching through hole (101) is arranged through the die body (11), and the punching through hole (101) comprises a cutting edge (1011) and a transition section (1012) which are connected in sequence, and the inner diameter of the cutting edge (1011) gradually decreases from the transition section (1012) toward the entrance of the cutting edge (1011).

2. The die structure for preventing waste from rebounding as claimed in claim 1, characterized in that: The blade (1011) comprises a first inner wall (111), the first inner wall (111) is circumferentially arranged around the axis of the blade (1011), the transition section (1012) is a straight cylinder, the transition section (1012) comprises a second inner wall (112), and the angle between the first inner wall (111) and the second inner wall (112) is 0.3° to 0.5°.

3. The die structure for preventing waste from rebounding as claimed in claim 2, characterized in that: The depth of the blade (1011) is 1.5 mm to 2.0 mm.

4. The die structure for preventing waste from rebounding as claimed in claim 2, characterized in that: The punching through hole (101) further comprises a blanking section (1013), wherein the blanking section (1013) is connected to the transition section (1012), and the inner diameter of the blanking section (1013) gradually increases from the transition section (1012) towards a direction away from the knife edge (1011).

5. The die structure for preventing waste from rebounding as claimed in claim 4, characterized in that: The blanking section (1013) comprises a third inner wall (113), and an angle between the third inner wall (113) and the second inner wall (112) is 3° to 5°.

6. The die structure for preventing waste from rebounding as claimed in claim 2, characterized in that: The inner diameter of the entrance of the knife edge (1011) is smaller than the inner diameter of the transition section (1012).

7. The die structure for preventing waste from rebounding as claimed in claim 2, characterized in that: The die body (11) is provided with an air flow hole (102), the air flow hole (102) is in communication with the punching through hole (101), and the air flow hole (102) is used to destroy the negative pressure state of the punching through hole (101).

8. The die structure for preventing waste from rebounding as claimed in claim 7, characterized in that: The die body (11) comprises an upper surface (11a), wherein the upper surface (11a) is arranged at one end of the entrance of the blade (1011), the air flow hole (102) is arranged at an angle, one end of the air flow hole (102) is connected to the blade (1011) or the transition section (1012), and the other end of the air flow hole (102) is arranged to pass through the upper surface (11a).

9. A high-speed stamping die, characterized in that: It comprises an upper die and a die structure for preventing waste rebound as described in any one of claims 1 to 8, wherein the upper die is fixedly connected with a punch, the punch is adapted to the blade (1011), and the punch is used for blanking the material.

10. A high-speed stamping equipment, characterized in that: Including the high-speed stamping die as described in claim 9.

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