High-precision continuous in-die reverse fine punching device

Abstract

The invention discloses a high-precision continuous in-die reverse fine punching device which comprises a lower die base, a first air connector, a first air channel, a second air channel, a second air channel and a third air channel. The punch is arranged on the lower die base, a second air channel is arranged in the punch in a penetrating mode, the inner end of the second air channel communicates with the first air channel, and the outer end of the second air channel extends to the surface of the punching end of the punch; the upper die base is provided with a bell and spigot corresponding to the punch, the inner end of the bell and spigot is in butt joint with a third air channel, one end of the top of the third air channel is in butt joint with a second air connector, and the other end is in butt joint with a waste discharge port; and the rotary grinding structure is used for guiding waste materials formed by punching and grinding the punching position of the workpiece through self rotation, and the rotary grinding structure is rotationally arranged on the lower die base and at the outer end of the bell and spigot. According to the punching device, the quality defect that burrs and burrs are easily formed at the punching position of a workpiece when an existing punching device is used can be overcome, and the problem that machining precision and machining quality are affected by waste jumping can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of punching devices, in particular to a high-precision continuous in-die reverse fine punching device. Background Art

[0002] In the case of sheet metal die stamping, quality defects such as burrs and flashes are often formed at the punching points of the workpiece. The waste material formed by the punching cannot be separated from the workpiece material belt in time, resulting in material jumping during the operation, which affects the processing accuracy and quality of the workpiece. Summary of the invention

[0003] The purpose of the present invention is to provide a high-precision continuous in-mold reverse fine punching device in order to solve the quality defects of the existing stamping device, such as the formation of burrs and burrs at the punching position of the workpiece when the punching device is used, and the problem that the waste material jump affects the processing accuracy and processing quality.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: a high-precision continuous in-mold reverse fine punching device, comprising:

[0005] A lower mold base, on which a first air connector is disposed, the first air connector being connected to a first air passage;

[0006] A punch, which is arranged on the lower die base, and has a second air channel penetrating therein, wherein the inner end of the second air channel is connected to the first air channel, and the outer end of the second air channel extends to the punching end surface of the punch;

[0007] An upper die seat is provided with a socket corresponding to the punch, the inner end of the socket is connected to the third air channel, one end of the top of the third air channel is connected to the second air joint, and the other end is connected to the waste discharge port;

[0008] The rotary grinding structure is used to guide the waste formed by punching and grind the punching part of the workpiece through its own rotation. The rotary grinding structure is rotatably arranged on the lower die seat and the outer end of the socket.

[0009] As a further description of the above technical solution:

[0010] The rotary grinding structure includes a rotating seat, a grinding block, and a linkage member. The rotating seat is rotated and embedded in the countersunk structure at the outer end of the socket through the convex ribs on the outer surface. A through hole that is socketed with the punch is arranged at the center of the rotating seat. A second movable groove extends outside the through hole. The grinding block and the linkage member are arranged in the second movable groove.

[0011] As a further description of the above technical solution:

[0012] The grinding block is elastically rotatably connected in the second movable groove through a first connecting shaft and a torsion spring, and a right-angle grinding surface is arranged on the inner side of the grinding block.

[0013] As a further description of the above technical solution:

[0014] The first connecting shaft is eccentrically arranged on the circular grinding block.

[0015] As a further description of the above technical solution:

[0016] The linkage member is a V-shaped structure, a middle portion of which is elastically rotatably connected in the second movable groove through a second connecting shaft and a torsion spring.

[0017] As a further description of the above technical solution:

[0018] An abutment block corresponding to the punch is arranged at one end of the linkage member, and a wedge-shaped windward surface is arranged at the bottom of the abutment block.

[0019] As a further description of the above technical solution:

[0020] An elastic rod is arranged at one end of the linkage member, and the outer end of the elastic rod is connected to a ball shaft, and the ball shaft is rotatably connected in a spherical groove on the surface of the grinding block.

[0021] As a further description of the above technical solution:

[0022] The top of the third air passage is also rotatably provided with a flow guiding structure, which is a turbine, and the surface of which is spirally provided with flow guiding blades.

[0023] As a further description of the above technical solution:

[0024] A second magnet is disposed on the flow guide structure, and a magnetic pole of the second magnet is oriented parallel to the rotating grinding structure. At least one first magnet is disposed on the rotating grinding structure.

[0025] As a further description of the above technical solution:

[0026] The upper die seat is also provided with a first movable groove, the top of which is slidably provided with a stripper, a stripper ejector at the bottom of which is elastically connected to the stripper, and the punch is inserted into the stripper.

[0027] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0028] 1. The punching device of the present invention allows compressed gas to be introduced into the upper and lower die seats, so that waste materials can be quickly blown away from the workpiece after the workpiece is punched, thereby avoiding the problem of material jumping and ensuring processing accuracy; after punching, the rotating grinding structure can be rotated by the airflow to grind the punching part of the workpiece to remove surface burrs and burr defects, further ensuring processing accuracy and realizing high-precision fine punching of the workpiece.

[0029] 2. After the punch enters the through hole, it will push one end of the linkage upward to make it rotate, thereby driving the grinding block to rotate, so that the right-angle grinding surface protrudes from the lower surface of the upper die seat. When the rotating grinding structure rotates under the action of airflow, the punching part of the workpiece can be ground through the right-angle grinding surface to perform secondary processing on the processing defects.

[0030] 3. When the waste generated by punching is pushed into the socket by the punch and blown up by the airflow, the abutment block can partially block the waste and, under the action of the wedge-shaped windward surface, flip it from a lying state to an upright state, and fully contact with the airflow of the third airway to ensure the waste discharge efficiency; the wedge-shaped windward surface will rotate along the axis of the rotating grinding structure under the action of the vertical airflow of the second airway, thereby realizing the stable rotation drive of the rotating grinding structure; when the airflow in the third airway is pumped in, the guide structure rotates, causing the magnetic pole direction of the second magnet to change, and the first magnet is magnetically associated with it, thereby synchronously driving the rotating grinding structure to rotate, so as to further improve the grinding effect at the punching point of the workpiece and ensure the processing accuracy and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 The schematic diagram of the structure of a high-precision continuous in-mold reverse fine punching device during mold opening.

[0033] Figure 2 The figure is a schematic diagram of the structure of a punch in a high-precision continuous in-die reverse fine punching device.

[0034] Figure 3 The diagram is a partial structural diagram of an upper die base in a high-precision continuous in-die reverse fine punching device.

[0035] Figure 4 This is a diagram of the use status of the rotary grinding structure in a high-precision continuous in-mold reverse fine punching device when the mold is closed.

[0036] Figure 5 It is a schematic diagram of the structure of a rotary grinding structure in a high-precision continuous in-mold reverse fine punching device.

[0037] Figure 6 The schematic diagram of the structure of a high-precision continuous in-mold reverse fine punching device when the mold is closed.

[0038] Legend:

[0039] 1. Lower die seat; 11. First air joint; 12. First air channel; 13. First movable groove; 2. Punch; 21. Second air channel; 3. Upper die seat; 31. Socket; 32. Third air channel; 33. Second air joint; 34. Waste outlet; 4. Rotary grinding structure; 41. Rotating seat; 411. Through hole; 412. Second movable groove; 42. Grinding block; 421. First connecting shaft; 422. Right-angle grinding surface; 423. Spherical groove; 43. Linkage; 431. Second connecting shaft; 432. Abutment block; 433. Elastic rod; 434. Spherical shaft; 44. First magnet; 5. Guide structure; 51. Guide vane; 52. Second magnet; 6. Stripping insert; 7. Stripping ejector. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters refer to similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in the subsequent drawings.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the 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 present invention.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 direct connection, an indirect connection through an intermediate medium, or the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Embodiment 1:

[0046] See also Figure 1-6 The present invention provides a technical solution: a high-precision continuous in-mold reverse fine punching device, comprising:

[0047] A lower die base 1, on which a first air connector 11 is provided, wherein the first air connector 11 is connected to a first air passage 12;

[0048] A punch 2 is arranged on the lower die base 1, and a second air channel 21 is provided therein, wherein the inner end of the second air channel 21 is connected to the first air channel 12, and the outer end thereof extends to the punching end surface of the punch 2;

[0049] The upper die base 3 is provided with a socket 31 corresponding to the punch 2, the inner end of the socket 31 is connected to the third air channel 32, one end of the top of the third air channel 32 is connected to the second air joint 33, and the other end is connected to the waste discharge port 34;

[0050] The rotary grinding structure 4 is used to guide the waste formed by punching and grind the punching part of the workpiece by rotating itself. It is rotatably arranged on the lower die base 1 and the outer end of the socket 31.

[0051] The punching device of the present invention allows compressed gas to be introduced into the upper and lower die seats, so that waste materials can be quickly blown away from the workpiece after the workpiece is punched, thereby avoiding the problem of material jumping and ensuring processing accuracy; after punching, the rotating grinding structure can be rotated by the airflow to grind the punching position of the workpiece to remove surface burrs and burr defects, further ensuring processing accuracy and realizing high-precision fine punching processing of the workpiece.

[0052] The rotating grinding structure 4 includes a rotating seat 41, a grinding block 42, and a linkage member 43. The rotating seat 41 is rotated and embedded in the countersunk structure at the outer end of the socket 31 through the convex ribs on the outer surface. A through hole 411 is provided at the center thereof to socket with the punch 2. A second movable groove 412 extends outwardly of the through hole 411. The grinding block 42 and the linkage member 43 are arranged in the second movable groove 412.

[0053] The grinding block 42 is rotatably connected in the second movable groove 412 through the first connecting shaft 421 and the torsion spring, and a right-angle grinding surface 422 is arranged inside the grinding block 42. The first connecting shaft 421 is eccentrically arranged on the circular grinding block 42. As a result, when punching a workpiece, the grinding block 42 stably supports the top surface of the workpiece. After punching, the grinding block 42 rotates so that the right-angle grinding surface 422 protrudes from the lower surface of the upper die seat 3, so as to grind and perform secondary processing on the workpiece.

[0054] The linkage member 43 is a V-shaped structure, the middle of which is elastically rotatably connected in the second movable groove 412 through the second connecting shaft 431 and the torsion spring. An elastic rod 433 is provided at one end of the linkage member 43, and the outer end of the elastic rod 433 is connected to the ball shaft 434, and the ball shaft 434 is rotatably connected in the spherical groove 423 on the surface of the grinding block 42. The linkage member 43 is designed based on the principle of a lever, so that when the punch 2 abuts against one end of it, the other end thereof is synchronously tilted, and the grinding block 42 is driven to rotate, so that the right-angle grinding surface 422 protrudes from the lower surface of the upper die seat 3, during which the elastic rod 433 is deformed to ensure that the structure has no interference and stable associated activities.

[0055] The upper die seat 3 is also provided with a first movable groove 13, and a stripping insert 6 is slidably provided on the top of the first movable groove 13, and a stripping ejector pin 7 at the bottom thereof is elastically connected to the stripping insert 6. The punch 2 is passed through the stripping insert 6 to ensure stable support for the end face of the workpiece strip during punching, further improve the processing accuracy, and realize the ejection of the workpiece and convenient and rapid demolding when the mold is opened.

[0056] The working principle of a high-precision continuous in-mold reverse fine punching device of the present embodiment includes: when the mold is closed, the stripper 6 is pressed into the first movable groove 13 by the upper mold base 3 and the workpiece material strip. During this period, the stripper ejector 7 elastically presses the stripper 6, the punch 2 is exposed, and the workpiece material strip is punched; after punching, an external air supply system is set up to pump compressed air into the first air channel 12 and the third air channel 32, so that part of the air flow is rushed out from the top of the second air channel 21 and the punching end of the punch, and the waste generated by the punching is pushed upward. It is impacted by the airflow and the airflow in another direction formed by the third air channel 32, and is discharged from the device through the waste discharge port 34 to avoid the problem of material jumping; after the punch 2 enters the through hole 411, it will push one end of the linkage part 43 upward to make it rotate, thereby driving the grinding block 42 to rotate, so that the right-angle grinding surface 422 protrudes from the lower surface of the upper die seat 3. When the rotating grinding structure 4 is rotated by the airflow, the right-angle grinding surface 422 can be used to grind the punching hole of the workpiece and perform secondary processing on the processing defects.

[0057] Embodiment 2:

[0058] See also Figure 3 , 4On the basis of the above-mentioned embodiment 1, preferably, an abutment block 432 corresponding to the punch 2 is provided at one end of the linkage member 43, and a wedge-shaped windward surface is provided at the bottom of the abutment block 432.

[0059] The working principle of a high-precision continuous in-mold reverse fine punching device of the present embodiment includes: when in use, when the waste generated by punching is pushed into the socket 31 by the punch 2 and blown up by the airflow, the abutment block 432 can partially block the waste and, under the action of the wedge-shaped windward surface, cause it to flip over from a lying state to an upright state, and fully contact with the airflow of the third air duct 32, thereby ensuring the waste discharge efficiency; the wedge-shaped windward surface will rotate along the axis of the rotating grinding structure 4 under the action of the vertical airflow of the second air duct 21, thereby realizing the stable rotation drive of the rotating grinding structure 4.

[0060] Embodiment three:

[0061] See also Figure 3 On the basis of the above-mentioned embodiment 1, preferably, a guide structure 5 is rotatably provided at the top of the third air duct 32, and the guide structure is a turbine, and a guide blade 51 is spirally provided on its surface, thereby further improving the stability of the airflow in the third air duct 32, thereby ensuring the discharge efficiency of the waste therein.

[0062] Embodiment 4:

[0063] See also Figure 3 , 5 On the basis of the above-mentioned third embodiment, preferably, a second magnet 52 is provided on the guide structure 5, and the magnetic pole of the second magnet 52 is oriented parallel to the rotating grinding structure 4, and at least one first magnet 44 is provided on the rotating grinding structure 4.

[0064] The working principle of a high-precision continuous in-mold reverse fine punching device of the present embodiment includes: when the air flow in the third air duct 32 is pumped in, the flow guide structure 5 rotates, causing the magnetic pole direction of the second magnet 52 to change, and the first magnet 44 is magnetically associated with it, thereby synchronously driving the rotating grinding structure 4 to rotate, so as to further improve the grinding effect at the punching point of the workpiece and ensure the processing accuracy and quality.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-precision continuous in-mold reverse fine punching device, characterized in that: include: A lower mold base, on which a first air connector is disposed, the first air connector being connected to a first air passage; A punch, which is arranged on the lower die base, and has a second air channel penetrating therein, wherein the inner end of the second air channel is connected to the first air channel, and the outer end of the second air channel extends to the punching end surface of the punch; An upper die seat is provided with a socket corresponding to the punch, the inner end of the socket is connected to the third air channel, one end of the top of the third air channel is connected to the second air joint, and the other end is connected to the waste discharge port; The rotary grinding structure is used to guide the waste formed by punching and grind the punching part of the workpiece through its own rotation. The rotary grinding structure is rotatably arranged on the lower die seat and the outer end of the socket.

2. A high-precision continuous in-mold reverse fine punching device according to claim 1, characterized in that: The rotary grinding structure includes a rotating seat, a grinding block, and a linkage member. The rotating seat is rotated and embedded in the countersunk structure at the outer end of the socket through the convex ribs on the outer surface. A through hole that is socketed with the punch is arranged at the center of the rotating seat. A second movable groove extends outside the through hole. The grinding block and the linkage member are arranged in the second movable groove.

3. A high-precision continuous in-mold reverse fine punching device according to claim 2, characterized in that: The grinding block is elastically rotatably connected in the second movable groove through a first connecting shaft and a torsion spring, and a right-angle grinding surface is arranged on the inner side of the grinding block.

4. A high-precision continuous in-mold reverse fine punching device according to claim 3, characterized in that: The first connecting shaft is eccentrically arranged on the circular grinding block.

5. A high-precision continuous in-mold reverse fine punching device according to claim 2, characterized in that: The linkage member is a V-shaped structure, a middle portion of which is elastically rotatably connected in the second movable groove through a second connecting shaft and a torsion spring.

6. A high-precision continuous in-mold reverse fine punching device according to claim 2, characterized in that: An abutment block corresponding to the punch is arranged at one end of the linkage member, and a wedge-shaped windward surface is arranged at the bottom of the abutment block.

7. A high-precision continuous in-mold reverse fine punching device according to claim 2, characterized in that: An elastic rod is arranged at one end of the linkage member, and the outer end of the elastic rod is connected to a ball shaft, and the ball shaft is rotatably connected in a spherical groove on the surface of the grinding block.

8. A high-precision continuous in-mold reverse fine punching device according to claim 1, characterized in that: The top of the third air passage is also rotatably provided with a flow guiding structure, which is a turbine, and the surface of which is spirally provided with flow guiding blades.

9. A high-precision continuous in-mold reverse fine punching device according to claim 8, characterized in that: A second magnet is disposed on the flow guide structure, and a magnetic pole of the second magnet is oriented parallel to the rotating grinding structure. At least one first magnet is disposed on the rotating grinding structure.

10. A high-precision continuous in-mold reverse fine punching device according to claim 1, characterized in that: The upper die seat is also provided with a first movable groove, the top of which is slidably provided with a stripper, a stripper ejector at the bottom of which is elastically connected to the stripper, and the punch is inserted into the stripper.

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