A die punching mechanism to prevent scrap from jumping

Abstract

This utility model discloses a die punching mechanism for preventing waste material from jumping out of the die, including an upper die assembly, a cutting tool, a push rod mechanism, and a lower die assembly. The upper die assembly includes an upper die base and an upper template assembly, with the upper template assembly located at the bottom of the upper die base. The cutting tool is detachably mounted on the upper template assembly and extends vertically to protrude from the bottom of the upper template assembly. The cutting tool has a first through hole. The push rod mechanism includes a first push rod, an elastic element, and a second push rod. The first push rod is located on the upper die base, the elastic element is located between the first push rod and the upper die base, and the second push rod passes through the first through hole. The elastic element can drive the second push rod to push out the bottom end of the cutting tool through the first push rod. The lower die assembly is located below the upper die assembly. The first and second push rods are separately arranged, allowing the first push rod and the elastic element to be held within the upper die base without disassembly or replacement. Only the cutting tool and the second push rod need to be replaced, preventing the elastic element from falling out during disassembly and making disassembly and assembly more convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of punching equipment, and in particular to a die punching mechanism for preventing waste material from jumping out. Background Technology

[0002] Currently, stamping dies frequently encounter the problem of scrap material jumping out of the cutting edge during punching. This scrap material can collide with the product or die surface, easily causing indentations, scratches, and other damage to the finished product or parts, severely impacting product quality. Therefore, in existing technology, ejector pins are typically installed inside the punching tool, forming a structure similar to a female punch. When the tool punches, the ejector pin pushes out the scrap material to prevent it from affecting product quality. However, when changing punching specifications, the entire tool and ejector pin mechanism need to be disassembled and replaced. This replacement process involves multiple parts, making assembly cumbersome and increasing die adjustment time while also affecting production efficiency. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a die punching mechanism to prevent waste material from jumping out, which solves the problem of cumbersome assembly and disassembly.

[0004] A die punching mechanism for preventing waste material from jumping, according to a first aspect of the present invention, includes: an upper die assembly, a cutting tool, a push rod mechanism, and a lower die assembly. The upper die assembly includes an upper die base and an upper template assembly. The upper template assembly is disposed at the bottom of the upper die base. The cutting tool is detachably mounted on the upper template assembly and extends vertically to protrude from the bottom of the upper template assembly. The cutting tool has a first through hole extending along the extension direction of the cutting tool. The push rod mechanism includes a first push rod, an elastic element, and a second push rod. The first push rod is disposed on the upper die base. The elastic element is disposed between the first push rod and the upper die base. The second push rod passes through the first through hole. The bottom end of the first push rod abuts against the top end of the second push rod. The elastic element can drive the second push rod to push out the bottom end of the cutting tool through the first push rod. The lower die assembly is disposed below the upper die assembly.

[0005] According to an embodiment of the present invention, a die punching mechanism for preventing waste ejection has at least the following advantages: By setting the ejector rod of the ejector rod mechanism as a separate first ejector rod and second ejector rod, the first ejector rod and the elastic element can be kept installed in the upper die base. When changing the punching specification, the first ejector rod and the elastic element do not need to be disassembled and replaced, thus avoiding the problem of the elastic element easily falling off during disassembly and assembly. Only the cutting tool and the second ejector rod passing through the cutting tool need to be replaced to complete the punching specification conversion. Through the above structure, the number of parts that need to be disassembled and assembled when changing specifications is reduced, making the replacement operation more convenient.

[0006] According to some embodiments of the present invention, the upper mold base is provided with a second through hole opposite to the cutting tool and a stop screw, the first push rod is installed in the second through hole, the stop screw is threadedly connected to the second through hole, the upper end of the elastic member abuts against the stop screw, and the lower end abuts against the first push rod.

[0007] According to some embodiments of the present invention, the upper template assembly includes an upper pad, an upper clamping plate, a stop plate and a stripping plate arranged sequentially from top to bottom. The first push rod is inserted into the upper pad, and the cutter is connected to the upper clamping plate and passes through the stop plate and the stripping plate.

[0008] According to some embodiments of the present invention, the first top rod includes a limiting platform and a first rod body. The limiting platform is disposed at the top of the first rod body and can slide up and down in the second through hole. The first rod body can be inserted into the upper pad and the limiting platform can abut against and limit the upper pad.

[0009] According to some embodiments of the present invention, the top end of the second push rod is provided with a first abutting platform, the bottom end of the first push rod can abut against the top end of the first abutting platform, the bottom end of the first abutting platform can abut against the top end of the cutter, and the bottom end of the second push rod is provided with a second abutting platform, which is used to abut against waste material.

[0010] According to some embodiments of this utility model, the upper clamping plate is provided with a clamping plate insert, the upper clamping plate is provided with a first mounting hole in the middle, the clamping plate insert is detachably installed in the first mounting hole, the clamping plate insert is provided with a through mounting hole, the mounting hole includes a first hole segment and a second hole segment arranged sequentially from top to bottom, the diameter of the first hole segment is larger than that of the second hole segment, the cutting tool has an annular limiting part, and the annular limiting part is provided near the top of the cutting tool, the annular limiting part is located in the first hole segment, and the second hole segment can restrict the downward movement of the annular limiting part, the top of the annular limiting part abuts against the upper pad plate.

[0011] According to some embodiments of the present invention, the stripping plate is provided with a stripping insert, the stripping plate is provided with a second assembly hole, the stripping insert is detachably installed in the second assembly hole, and the cutting tool passes through the stripping insert.

[0012] According to some embodiments of the present invention, the cutting tool includes a connecting section, a transition section, and a cutting head section arranged sequentially from top to bottom. Both the connecting section and the cutting head section are cylindrical, and the diameter of the connecting section is larger than the diameter of the cutting head section. The outer peripheral wall of the transition section is a guide cone surface.

[0013] According to some embodiments of the present invention, the lower mold assembly includes a lower mold base, a lower pad, and a lower template arranged sequentially from bottom to top. The lower template is provided with a first waste hole, the lower pad is provided with a second waste hole, and the lower mold base is provided with a third waste hole. The axes of the first waste hole, the second waste hole, and the third waste hole all coincide.

[0014] According to some embodiments of the present invention, the diameters of the first waste hole, the second waste hole, and the third waste hole increase sequentially.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 These are cross-sectional views of some embodiments of the present utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B in the middle.

[0017] Figure label: Upper mold assembly 100, upper mold base 110, second through hole 111, stop screw 112, upper pad 120, upper clamping plate 130, clamping plate insert 131, mounting hole 1311, first hole section 1311a, second hole section 1311b, first assembly hole 132, stop plate 140, stripper plate 150, second assembly hole 151, stripper plate insert 152; Cutting tool 200, first through hole 210, annular limiting part 220, connecting section 230, transition section 240, cutting head section 250; The push rod mechanism 300, the first push rod 310, the limiting platform 311, the first rod body 312, the elastic element 320, the second push rod 330, the first abutting platform 331, and the second abutting platform 332; The components include: lower mold assembly 400, lower mold base 410, third waste hole 411, lower pad 420, second waste hole 421, lower template 430, and first waste hole 431. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Reference Figures 1 to 3According to a first aspect of the present invention, a die punching mechanism for preventing waste from jumping out of the mold includes an upper die assembly 100, a cutter 200, a push rod mechanism 300, and a lower die assembly 400. The upper die assembly 100 includes an upper die base 110 and an upper template assembly. The upper template assembly is disposed at the bottom of the upper die base 110. The cutter 200 is detachably mounted on the upper template assembly and extends vertically to protrude from the bottom of the upper template assembly. The cutter 200 has a first through hole 210, which extends along the extension direction of the cutter 200. Extending outwards, the ejector mechanism 300 includes a first ejector 310, an elastic element 320, and a second ejector 330. The first ejector 310 is disposed on the upper die base 110, the elastic element 320 is disposed between the first ejector 310 and the upper die base 110, and the second ejector 330 passes through the first through hole 210. The bottom end of the first ejector 310 abuts against the top end of the second ejector 330. The elastic element 320 can drive the second ejector 330 to eject the bottom end of the cutter 200 through the first ejector 310. The lower die assembly 400 is disposed below the upper die assembly 100. By setting the ejector rods of the ejector mechanism 300 as separate first ejector 310 and second ejector 330, the first ejector 310 and the elastic element 320 can be kept installed in the upper die base 110. When changing the punching specifications, the first ejector 310 and the elastic element 320 do not need to be disassembled and replaced, thus avoiding the problem of the elastic element 320 easily falling off during disassembly and assembly. The punching specification conversion can be completed simply by replacing the cutting tool 200 and the second push rod 330 passing through the cutting tool 200. This structure reduces the number of parts that need to be disassembled during specification conversion, making the replacement operation more convenient.

[0022] Specifically, the upper mold assembly 100 can be raised and lowered, and can close with the lower mold assembly 400 to achieve punching. The specific lifting drive device is a conventional technical means and will not be described in detail here. An elastic element 320 and a first ejector rod 310 can be installed inside the upper mold base 110. The elastic element 320 can be a spring. The first ejector rod 310 is slidably installed on the upper mold base 110, and the elastic element 320 can drive the first ejector rod 310 to slide downwards. The upper mold plate assembly is detachably installed at the bottom of the upper mold base 110. The upper mold plate assembly is used to install the cutter 200 and is subjected to force transmission. The second ejector rod 330 is slidably connected in the first through hole 210 of the cutter 200 and is transmitted through the first ejector rod 310. During die closing and punching, the second ejector pin 330 abuts against the workpiece, compressing the elastic element 320. Then, the cutter 200 engages with the workpiece to punch the hole. Simultaneously, under the elastic force of the elastic element 320, the second ejector pin 330 ejects the scrap downwards, preventing it from jumping onto the workpiece or die. In this structure, the cutter 200 and the second ejector pin 330 can be disassembled and replaced with different specifications, reducing the number of parts that need to be replaced and simplifying disassembly and assembly. Compared to an integral ejector pin structure, the separate second ejector pin 330 can be shorter, allowing for a smaller diameter second ejector pin 330 while maintaining bending strength, thus accommodating smaller diameter cutters 200 and meeting the need for punching smaller holes.

[0023] Reference Figure 1 and Figure 2 In some embodiments of this utility model, the upper mold base 110 is provided with a second through hole 111 opposite to the cutting tool 200 and a stop screw 112. The first ejector rod 310 is installed in the second through hole 111, and the stop screw 112 is threadedly connected to the second through hole 111. The upper end of the elastic member 320 abuts against the stop screw 112, and the lower end abuts against the first ejector rod 310. Specifically, the upper mold base 110 may be provided with a vertically penetrating second through hole 111. The upper part of the second through hole 111 may be machined with internal threads for the stop screw 112 to connect. The first ejector rod 310 can be installed into the second through hole 111 first, then the elastic member 320 can be installed, and finally the stop screw 112 can be installed. With the above structure, the first ejector rod 310 can be easily assembled. And when it is necessary to change the specifications, the elastic member 320 can be kept in the upper mold base 110 to prevent parts from falling out and affecting the disassembly and assembly operations.

[0024] Reference Figure 1 and Figure 2In some embodiments of this utility model, the upper template assembly includes an upper pad 120, an upper clamping plate 130, a stop plate 140, and a stripper plate 150 arranged sequentially from top to bottom. A first push rod 310 is inserted into the upper pad 120, and a cutter 200 is connected to the upper clamping plate 130 and passes through the stop plate 140 and the stripper plate 150. Specifically, the upper pad 120 can distribute pressure and provide a flat reference surface, the upper clamping plate 130 is used to position and install the cutter 200, the stop plate 140 is used to constrain and guide the cutter 200 in the horizontal direction, and the stripper plate 150 is used to abut against the workpiece and cooperate with the cutter 200 to remove waste material.

[0025] Reference Figure 1 and Figure 2 In some embodiments of this utility model, the first push rod 310 includes a limiting platform 311 and a first rod body 312. The limiting platform 311 is disposed at the top of the first rod body 312 and can slide up and down within the second through hole 111. The first rod body 312 can be inserted into the upper pad 120, and the limiting platform 311 can abut against the upper pad 120 for limitation. Specifically, the limiting platform 311 can be cylindrical and can be clearance-fitted with the second through hole 111. The first rod body 312 can be inserted into the pad and abut against the second push rod 330. The elastic member 320 abuts against the limiting platform 311 and drives the limiting platform 311 to slide down to abut against the upper pad 120, which can effectively limit the sliding range of the first push rod 310.

[0026] Reference Figure 1 and Figure 2 In some embodiments of this utility model, the second push rod 330 has a first abutment platform 331 at its top, the bottom of the first push rod 310 can abut against the top of the first abutment platform 331, the bottom of the first abutment platform 331 can abut against the top of the cutter 200, and the bottom of the second push rod 330 has a second abutment platform 332 for abutting against waste material. Specifically, the first abutment platform 331 can be provided with a frustum-shaped structure, with a diameter larger than the diameter of the main body of the second push rod 330, which can increase the contact area with the first push rod 310 and facilitate transmission. The second abutment platform 332 can also be provided with a frustum-shaped structure, which can increase the contact area with the waste material and facilitate ejecting the waste material.

[0027] Reference Figure 1 and Figure 2In some embodiments of this utility model, the upper clamping plate 130 is provided with a clamping plate insert 131, and the upper clamping plate 130 is provided with a first mounting hole 132 in the middle. The clamping plate insert 131 is detachably installed in the first mounting hole 132. The clamping plate insert 131 is provided with a through mounting hole 1311. The mounting hole 1311 includes a first hole segment 1311a and a second hole segment 1311b arranged sequentially from top to bottom. The diameter of the first hole segment 1311a is larger than that of the second hole segment 1311b. The tool 200 has an annular limiting part 220, and the annular limiting part 220 is provided close to the top of the tool 200. The annular limiting part 220 is located in the first hole segment 1311a, and the second hole segment 1311b can restrict the downward movement of the annular limiting part 220. The top of the annular limiting part 220 abuts against the upper pad 120. Specifically, the cutting tool 200 can be inserted downwards into the mounting hole 1311. The annular limiting part 220 can be inserted into the first hole section 1311a but cannot pass through the second hole section 1311b, thus achieving a limiting effect. Furthermore, with the cooperation of the upper pad 120, the cutting tool 200 can be mounted on the clamping plate. Moreover, the cutting tool 200 only wears in contact with the clamping plate insert 131, thus protecting the clamping plate. When the clamping plate insert 131 wears out, only this small component needs to be replaced, which is far less costly than repairing or replacing the entire clamping plate.

[0028] Reference Figure 1 and Figure 3 In some embodiments of this utility model, the stripper plate 150 is provided with a stripper insert 152 and a second mounting hole 151. The stripper insert 152 is detachably installed in the second mounting hole 151, and the cutter 200 passes through the stripper insert 152. Specifically, the stripper insert 152 can also protect the stripper plate 150. After the stripper insert 152 wears out, only this small part needs to be replaced, which is much cheaper than repairing or replacing the entire stripper plate 150. Reference Figure 1 and Figure 3 In some embodiments of this utility model, the cutting tool 200 includes a connecting section 230, a transition section 240, and a cutting head section 250 arranged sequentially from top to bottom. Both the connecting section 230 and the cutting head section 250 are cylindrical, and the diameter of the connecting section 230 is larger than the diameter of the cutting head section 250. The outer peripheral wall of the transition section 240 is a guide cone surface. Specifically, the diameter of the connecting section 230 is larger than that of the cutting head section 250, which can improve the structural strength and facilitate transmission. When assembling the cutting tool 200, the guide cone surface of the transition section 240 can easily align the hole positions, making assembly more convenient.

[0029] Reference Figure 1 and Figure 3In some embodiments of this utility model, the lower mold assembly 400 includes a lower mold base 410, a lower pad 420, and a lower template 430 arranged sequentially from bottom to top. The lower template 430 has a first waste hole 431, the lower pad 420 has a second waste hole 421, and the lower mold base 410 has a third waste hole 411. The axes of the first waste hole 431, the second waste hole 421, and the third waste hole 411 all coincide. Specifically, the lower template 430 is used to receive the workpiece and adapt to the processing requirements of the workpiece, while the lower pad 420 is used to distribute pressure and provide a flat reference surface. The lower pad 420 and the lower template 430 are detachably installed on the lower mold base 410, and the first waste hole 431, the second waste hole 421, and the third waste hole 411 allow waste material to be ejected downwards.

[0030] Reference Figure 1 and Figure 3 In some embodiments of this utility model, the diameters of the first waste hole 431, the second waste hole 421, and the third waste hole 411 are successively increased to facilitate the smooth downward discharge of waste.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A die punching mechanism for preventing scrap from jumping out, characterized in that, include: The upper mold assembly (100) includes an upper mold base (110) and an upper template assembly, wherein the upper template assembly is located at the bottom of the upper mold base (110); A cutting tool (200) is disposed on the upper template assembly and extends vertically to protrude from the bottom of the upper template assembly. The cutting tool (200) has a first through hole (210) which extends along the extension direction of the cutting tool (200). The ejector mechanism (300) includes a first ejector (310), an elastic element (320), and a second ejector (330). The first ejector (310) is disposed on the upper mold base (110), the elastic element (320) is disposed between the first ejector (310) and the upper mold base (110), and the second ejector (330) passes through the first through hole (210). The bottom end of the first ejector (310) abuts against the top end of the second ejector (330), and the elastic element (320) can drive the second ejector (330) to eject the bottom end of the cutter (200) through the first ejector (310). The lower mold assembly (400) is located below the upper mold assembly (100).

2. The die punching mechanism for preventing waste from jumping out according to claim 1, characterized in that, The upper mold base (110) is provided with a second through hole (111) opposite to the cutting tool (200) and a stop screw (112). The first push rod (310) is installed in the second through hole (111), and the stop screw (112) is threadedly connected to the second through hole (111). The upper end of the elastic member (320) abuts against the stop screw (112), and the lower end abuts against the first push rod (310).

3. The die punching mechanism for preventing waste from jumping out according to claim 2, characterized in that, The upper template assembly includes an upper pad plate (120), an upper clamping plate (130), a stop plate (140), and a stripping plate (150) arranged sequentially from top to bottom. The first push rod (310) is inserted into the upper pad plate (120), and the cutter (200) is connected to the upper clamping plate (130) and passes through the stop plate (140) and the stripping plate (150).

4. The die punching mechanism for preventing waste from jumping out according to claim 3, characterized in that, The first top rod (310) includes a limiting platform (311) and a first rod body (312). The limiting platform (311) is located at the top of the first rod body (312). The limiting platform (311) can slide up and down in the second through hole (111). The first rod body (312) can be inserted into the upper pad (120). The limiting platform (311) can abut against the upper pad (120) for limiting.

5. The die punching mechanism for preventing waste from jumping as described in claim 1, characterized in that, The second push rod (330) has a first abutment platform (331) at its top end. The bottom of the first push rod (310) can abut against the top of the first abutment platform (331). The bottom of the first abutment platform (331) can abut against the top of the cutter (200). The bottom of the second push rod (330) has a second abutment platform (332) for abutting against waste material.

6. The die punching mechanism for preventing waste from jumping out according to claim 3, characterized in that, The upper clamping plate (130) is provided with a clamping plate insert (131). The upper clamping plate (130) has a first mounting hole (132) in the middle. The clamping plate insert (131) is detachably installed in the first mounting hole (132). The clamping plate insert (131) has a through mounting hole (1311) that extends vertically. The mounting hole (1311) includes a first hole section (1311a) and a second hole section (1311b) arranged sequentially from top to bottom. The first hole section (1311a) The diameter of the cutting tool (200) is larger than that of the second hole segment (1311b). The cutting tool (200) has an annular limiting part (220) and the annular limiting part (220) is disposed near the top of the cutting tool (200). The annular limiting part (220) is located inside the first hole segment (1311a), and the second hole segment (1311b) can restrict the annular limiting part (220) from moving downward. The top of the annular limiting part (220) abuts against the upper pad (120).

7. The die punching mechanism for preventing waste from jumping out according to claim 3, characterized in that, The stripping plate (150) is provided with a stripping insert (152), the stripping plate (150) is provided with a second assembly hole (151), the stripping insert (152) is detachably installed in the second assembly hole (151), and the cutting tool (200) passes through the stripping insert (152).

8. The die punching mechanism for preventing waste from jumping out according to claim 1, characterized in that, The cutting tool (200) includes a connecting section (230), a transition section (240) and a cutting head section (250) arranged sequentially from top to bottom. Both the connecting section (230) and the cutting head section (250) are cylindrical, and the diameter of the connecting section (230) is larger than the diameter of the cutting head section (250). The outer peripheral wall of the transition section (240) is a guide cone surface.

9. The die punching mechanism for preventing waste from jumping out according to claim 1, characterized in that, The lower mold assembly (400) includes a lower mold base (410), a lower pad (420), and a lower template (430) arranged sequentially from bottom to top. The lower template (430) is provided with a first waste hole (431), the lower pad (420) is provided with a second waste hole (421), and the lower mold base (410) is provided with a third waste hole (411). The axes of the first waste hole (431), the second waste hole (421), and the third waste hole (411) all coincide.

10. The die punching mechanism for preventing waste from jumping out according to claim 9, characterized in that, The diameters of the first waste hole (431), the second waste hole (421), and the third waste hole (411) increase sequentially.

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