A die structure for preventing adhesion of a punching blank

Abstract

The utility model discloses a punch -cutting die field's a kind of punch -cutting blanking anti -sticking die structure, including upper die and lower die, the upper die includes punch, and the lower die includes material removal mechanism;The punch includes first punch and second punch, and the first punch is directly opposite the material removal mechanism on the lower die, and the second punch is directly opposite blanking hole on the lower die;Gas passage is equipped in the upper die, and gas passage is connected with gas conveying device, and the gas passage is used to blow waste to blanking hole;The material removal mechanism includes floating son and elastic piece, and waste is located on floating son.The die structure provided by the utility model avoids waste sticking on die by the material removal mechanism and gas passage, and the material removal mechanism drags the waste that is not cut off, and gas passage is arranged on second punch, and waste is blown to blanking hole by gas passage and gas conveying device, to avoid waste sticking on punch to affect next punch -cutting, so as to improve material belt utilization, improve punch -cutting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of punching dies, and in particular to a punching blanking anti-sticking die structure. Background Technology

[0002] In the production of strip stamping for automotive connectors such as fork-shaped bayonets and cantilever fork bayonets, the uneven edges of these shapes often result in scrap sticking to the die during the traditional stamping process, preventing proper ejection or causing die compression. This leads to high labor and maintenance costs and impacts production capacity. Traditional die improvements address this by changing the bayonet area from a single-step stamping to a multi-step stamping, reducing the clamping force during each step, or increasing the step distance or strip width to increase the scrap projection area and thus the ejection hole area. While these methods improve ejection, they introduce new problems. For example, due to multi-step stamping, different parts of the same terminal head are processed by different punch stations, resulting in different tolerances at the same point in the final product. Increasing the step distance or strip width reduces strip utilization, further increasing costs. Utility Model Content

[0003] The purpose of this utility model is to provide a punching and blanking anti-sticking mold structure, which avoids waste material sticking to the mold by setting a stripping mechanism and air passage, thereby improving the utilization rate of the strip.

[0004] To solve the above technical problems, the following technical solution is adopted: This utility model provides a punching and blanking anti-sticking mold structure, including an upper mold and a lower mold, wherein the upper mold includes a punch and the lower mold includes a stripping mechanism; The punch includes a first punch and a second punch, the first punch being directly opposite the stripping mechanism on the lower die, and the second punch being directly opposite the blanking hole on the lower die; The upper mold is provided with an air passage, and an air supply device is connected to the outside of the air passage. The air passage is used to blow the waste material into the discharge hole. The first punch is used to cut part of the waste material on the strip, and the second punch is used to cut the remaining part of the waste material. The cut waste material falls into the discharge hole. The unloading mechanism includes a floating insert and an elastic element. The waste material is located on the floating insert. After the first punch cuts the waste material, the compressed elastic element drives the floating insert to push the waste material towards the first punch.

[0005] Optionally, the shape of the cutting end face of the first punch is the same as the shape of the waste material, and a chamfer structure is provided on the cutting end face of the first punch. After the first punch cuts the waste material, the position on the waste material corresponding to the chamfer structure is not cut, and the second punch cuts the uncut part.

[0006] Optionally, the air passage opens from the cutting end face of the second punch and extends to the side opening of the upper die. The side opening is connected to the air supply device through an air pipe. The completely cut waste material is blown off the second punch and falls into the discharge hole through the air passage and the air supply device.

[0007] Optionally, the upper mold further includes an upper template, and an upper fixing plate, a pad, a punch fixing plate, and an upper mold push plate are sequentially arranged below the upper template. The upper fixing plate is connected to the punch fixing plate, and a pad is arranged between the upper fixing plate and the punch fixing plate. The upper mold push plate is connected to the upper fixing plate through a buffer assembly. The punch fixing plate is used to install the punch, and the punch passes through the upper mold push plate.

[0008] Optionally, the buffer assembly includes a connecting rod and a spring, with the upper fixed plate and the upper pusher plate respectively connected to the two ends of the connecting rod, and the spring sleeved on the connecting rod.

[0009] Optionally, the lower mold includes a lower fixed plate, a feeding plate is provided above the lower fixed plate, a feeding pad is provided between the feeding plate and the lower fixed plate, the ejection mechanism is disposed in the lower fixed plate, and the floating insert passes through the feeding pad and the feeding plate and is located on the upper surface of the feeding plate.

[0010] Optionally, the feeding plate is provided with a cutting insert and a cutting opening, the feeding hole is provided on the cutting insert, the cutting opening is directly opposite the first punch, and the floating insert is provided inside the cutting opening.

[0011] Optionally, the unloading mechanism further includes a ejector pin, an ejector pin fixing block, and a guide rod. The elastic element includes a spring. The ejector pin is connected below the floating insert. The ejector pin is mounted on the ejector pin fixing block. A guide rod is provided through the ejector pin fixing block. A spring is sleeved on the guide rod. The spring is located below the ejector pin fixing block.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: The mold structure provided by this utility model avoids waste material from sticking to the mold through the setting of the stripping mechanism and air passage. The stripping mechanism drags the uncut waste material and pushes it out after the first punch cuts it, so as to avoid the waste material sticking and causing damage when the material strip moves. An air passage is set on the second punch, and the waste material is blown off to the drop hole through the air passage and air conveying device, so as to avoid the waste material sticking to the punch and affecting the next punching, thereby improving the material strip utilization rate and punching efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the punching and blanking anti-sticking mold structure in the embodiment of this utility model; Figure 2 This is a cross-sectional structural diagram of the punching and blanking anti-sticking mold structure in an embodiment of this utility model; Figure 3 This is a schematic diagram of the punch structure in an embodiment of this utility model; Figure 4 This is a schematic diagram of the material strip and the feeding plate structure in an embodiment of this utility model; Figure 5 This is a schematic diagram of the feed plate structure in an embodiment of this utility model; Figure 6 This is a schematic diagram of the unloading mechanism in this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. Upper template; 2. Upper fixing plate; 3. Pad plate; 4. Punch fixing plate; 41. First punch; 42. Chamfer structure; 43. Second punch; 44. Air passage; 5. Upper die push plate; 51. Connecting rod; 52. First spring; 6. Unloading plate; 61. Cutting insert; 62. Unloading hole; 63. Cutting opening; 7. Unloading pad plate; 8. Lower fixing plate; 9. Unloading mechanism; 91. Floating insert; 92. Ejector pin; 93. Ejector pin fixing block; 94. Guide rod; 95. Second spring; 10. Strip material; 101. Scrap material; 11. Guide assembly; 12. Die foot. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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, and 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, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., 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. 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.

[0017] Example 1

[0018] This embodiment provides a punching and blanking anti-sticking mold structure, including an upper mold and a lower mold. The upper mold includes a punch, and the lower mold includes a stripping mechanism 9. A strip 10 is provided between the upper mold and the lower mold. The waste material 101 on the strip 10 is cut off by punching downwards with the punch.

[0019] For the regularly shaped waste 101 on the material belt 10, a punch with the same shape is used to cut it off. For the irregularly shaped waste 101 on the material belt 10, the punch includes a first punch 41 and a second punch 43. The first punch 41 cuts off part of the waste 101, and the second punch 43 cuts off the remaining part of the waste 101. After the waste 101 is cut off by the first punch 41, the waste 101 is still on the material belt 10 and moves with the material belt 10 to the position of the second punch 43. The second punch 43 cuts off the waste 101 completely and then drops it into the discharge hole 62.

[0020] like Figure 1 , Figure 3 , Figure 6As shown, the stripping mechanism 9 on the lower die includes a floating insert 91 and an elastic element. The floating insert 91 is positioned directly opposite the first punch 41. When the scrap 101 is cut by the first punch 41, the scrap 101 is located on the floating insert 91. When the first punch 41 punches the scrap 101 downwards, it compresses the floating insert 91 downwards. As the floating insert 91 moves downwards, the elastic element is compressed. After the first punch 41 finishes cutting, the elastic element drives the floating insert 91 to return to its original position. During the return process, the floating insert 91 pushes the scrap 101 upwards, preventing the scrap 101 from sticking to the cutting opening 63 of the lower die.

[0021] The second punch 43 is provided with an air passage 44, which extends to the side of the upper die and is connected to an external air supply device. The air supply device supplies gas into the air passage 44 to blow the waste material 101 completely cut by the second punch 43 into the discharge hole 62, thus preventing the waste material 101 from sticking to the inner wall of the punch or the discharge hole 62.

[0022] The second punch 43 is located in front of the first punch 41. After the first punch 41 finishes cutting, the strip 10 moves to the position of the second punch 43 and is cut by the second punch 43. The cutting stroke of the first punch 41 is 1-1.5 mm longer than the material thickness to avoid excessive stretching at the connection between the scrap 101 and the strip 10 during cutting. The connection is then cut by the second punch 43, completely cutting the scrap 101 off the strip 10 and dropping it into the discharge hole 62. The discharge hole 62 is a rectangular structure larger than the length and width of the scrap 101 to facilitate its passage.

[0023] In this embodiment, the upper die also includes other punches, which are used to cut waste material 101 of regular shape.

[0024] The punching and blanking anti-sticking die structure provided in this embodiment cuts off the irregularly shaped waste material 101 in two steps by using the first punch 41 and the second punch 43 to cut off different positions. The waste material 101 is ejected from the cutting opening 63 by the ejection mechanism 9 to prevent it from sticking to the lower die, and the waste material 101 is prevented from sticking to the punch by the air passage 44.

[0025] Example 2

[0026] This embodiment provides a punching and blanking anti-sticking mold structure based on Embodiment 1, such as... Figure 1 As shown, several sets of guide components 11 are provided between the upper and lower dies. The identical structures of the guide components 11 in the figure are omitted. The guide components 11 are used for guiding during the upper die punching process.

[0027] like Figure 3 , Figure 4As shown, a chamfered structure 42 is provided on the cutting end face of the first punch 41. The cutting end face of the first punch 41 has the same shape as the scrap 101. After the scrap 101 is cut by the first punch 41, the position of the scrap 101 corresponding to the chamfered structure 42 is not cut, and the scrap 101 is still connected to the material belt 10. The scrap 101 is pushed out by the stripping mechanism 9 to prevent the scrap 101 from sticking to the cutting opening 63 and being pulled out when the material belt 10 moves. The material belt 10 moves and moves the scrap 101 to the position of the second punch 43. The second punch 43 cuts the scrap 101 at the position corresponding to the chamfered structure 42, and completely cuts off the scrap 101.

[0028] like Figure 2 As shown, the upper mold also includes an upper template 1. Below the upper template 1, an upper fixing plate 2, a pad 3, a punch fixing plate 4, and an upper mold pusher plate 5 are arranged sequentially. The upper template 1 is connected to the upper fixing plate 2, and the upper fixing plate 2 is connected to the punch fixing plate 4. A pad 3 is placed between the upper fixing plate 2 and the punch fixing plate 4. The upper fixing plate 2 is connected to the upper mold pusher plate 5 via a buffer assembly. The buffer assembly includes a connecting rod 51 and a first spring 52. The two ends of the connecting rod 51 are connected to the upper fixing plate 2 and the upper mold pusher plate 5, respectively. The first spring 52 is sleeved on the connecting rod 51. Two buffer assemblies are arranged between the upper fixing plate 2 and the upper mold pusher plate 5. There is a gap between the upper mold pusher plate 5 and the punch fixing plate 4. Several punches are installed on the punch fixing plate 4, and the punches penetrate the lower mold pusher plate.

[0029] like Figure 1 , Figure 2 , Figure 5 As shown, the lower die also includes a blanking plate 6, a blanking pad 7, and a lower fixing plate 8. The blanking pad 7 is positioned below the blanking plate 6, and the lower fixing plate 8 is positioned below the blanking pad 7. A foot mold 12 is positioned below the lower fixing plate 8. A cutting insert 61 is provided on the blanking plate 6 at the position corresponding to the punch. The cutting insert 61 corresponding to the first punch 41 has a cutting opening 63 of the same shape as the scrap 101. Discharge holes 62 are provided on the other cutting inserts 61. The cutting inserts 61 improve wear resistance and allow for easy replacement after wear. The discharge holes 62 pass through the blanking pad 7 and the lower fixing plate 8 and connect to the collecting device. The strip 10 is positioned between the blanking plate 6 and the upper die pusher plate 5. During cutting, the upper die plate 1 moves downward, and the upper die pusher plate 5 first contacts the blanking plate 6 to press down the strip 10. Then, the punch fixing plate 4 continues to move downward. During this process, the first spring 52 on the connecting rod 51 is compressed. After cutting, the punch fixing plate 4 first moves the punch upward. Due to the elasticity of the first spring 52, the lower die pusher plate presses down the strip 10 to prevent the punch from sticking to the strip 10, and moves the strip 10.

[0030] like Figure 3 , Figure 6As shown, the unloading mechanism 9 also includes a ejector pin 92, an ejector pin fixing block 93, and a guide rod 94. The elastic element is a second spring 95. The floating insert 91 is connected to the ejector pin fixing block 93 through the ejector pin 92. The ejector pin fixing block 93 is provided with guide rods 94 at both ends. The second spring 95 is sleeved on the guide rod 94. The second spring 95 is located below the ejector pin fixing block 93. The ejector pin fixing block 93 is set in the lower fixing plate 8. The ejector pin 92 and the floating insert 91 pass through the unloading pad 7 and the unloading plate 6 and are located in the cutting opening 63 of the unloading plate 6. The floating insert 91 is positioned directly opposite the first punch 41. The shape of the floating insert 91 is the same as that of the scrap 101. The scrap 101 is dragged by the floating insert 91. When the first punch 41 cuts the scrap 101, it presses the floating insert 91 downward. The floating insert 91 presses down on the ejector pin fixing block 93. The ejector pin fixing block 93 presses down on the second spring 95. The second spring 95 is compressed. When the first punch 41 is disengaged from the scrap 101, the compressed second spring 95 drives the ejector pin 92 and the floating insert 91 on it to move upward, thereby pushing the scrap 101 upward. This prevents the scrap 101 from being located inside the cutting opening 63, while the material strip 10 moves forward and is damaged.

[0031] The specific usage steps are as follows: The die closes in one stroke; the upper die moves downward, and each punch on the punch fixing plate 4 cuts the material plate. When the first punch 41 cuts the scrap 101, it compresses the floating insert 91 downward. The cutting stroke is 1-1.5 mm larger than the material thickness. The scrap 101 on the floating insert 91 is still connected to the material strip 10. The scrap 101 corresponding to the other punches is separated from the material strip 10 and falls into the corresponding dropping hole 62 and enters the collection device.

[0032] The die is opened in one stroke; under the action of the second spring 95 at its bottom, the stripping mechanism 9 pushes the uncut waste material 101 out of the cutting hole 63, and then the strip 10 moves forward, and the uncut waste material 101 enters the cutting insert 61 located directly opposite the second punch 43.

[0033] Second punch: The lower die moves downward to perform the cutting work. The uncut waste material 101 is completely separated from the material strip 10 by the cutting of the second punch 43. The waste material 101 falls into the discharge hole 62 and enters the collection device. At the same time, the air passage 44 on the second punch 43 can also assist in the discharge, preventing the waste material 101 from sticking to the second punch 43.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A punching and blanking anti-sticking die structure, comprising an upper die and a lower die, characterized in that, The upper die includes a punch, and the lower die includes a stripping mechanism; The punch includes a first punch and a second punch, the first punch being directly opposite the stripping mechanism on the lower die, and the second punch being directly opposite the blanking hole on the lower die; The upper mold is provided with an air passage, and an air supply device is connected to the outside of the air passage. The air passage is used to blow the waste material into the discharge hole. The first punch is used to cut part of the waste material on the strip, and the second punch is used to cut the remaining part of the waste material. The cut waste material falls into the discharge hole. The unloading mechanism includes a floating insert and an elastic element. The waste material is located on the floating insert. After the first punch cuts the waste material, the compressed elastic element drives the floating insert to push the waste material towards the first punch.

2. The punching and blanking anti-sticking die structure according to claim 1, characterized in that, The shape of the cutting end face of the first punch is the same as the shape of the waste material. The cutting end face of the first punch is provided with a chamfer structure. After the first punch cuts the waste material, the position of the waste material corresponding to the chamfer structure is not cut. The second punch cuts the uncut part.

3. The punching and blanking anti-sticking die structure according to claim 1, characterized in that, The air passage opens from the cutting end face of the second punch and extends to the side opening of the upper die. The side opening is connected to the air supply device through an air pipe. The completely cut waste material is blown off the second punch and falls into the discharge hole through the air passage and the air supply device.

4. The punching and blanking anti-sticking die structure according to claim 1, characterized in that, The upper mold also includes an upper template. Below the upper template, an upper fixing plate, a pad, a punch fixing plate, and an upper mold pusher plate are arranged in sequence. The upper fixing plate is connected to the punch fixing plate. A pad is arranged between the upper fixing plate and the punch fixing plate. The upper mold pusher plate is connected to the upper fixing plate through a buffer assembly. The punch fixing plate is used to install the punch. The punch passes through the upper mold pusher plate.

5. The punching and blanking anti-sticking die structure according to claim 4, characterized in that, The buffer assembly includes a connecting rod and a spring. The two ends of the connecting rod are respectively connected to the upper fixing plate and the upper pusher plate, and the spring is sleeved on the connecting rod.

6. The punching and blanking anti-sticking die structure according to claim 1, characterized in that, The lower mold includes a lower fixed plate, a feeding plate is provided above the lower fixed plate, a feeding pad is provided between the feeding plate and the lower fixed plate, the ejection mechanism is provided inside the lower fixed plate, and the floating insert passes through the feeding pad and the feeding plate and is located on the upper surface of the feeding plate.

7. The punching and blanking anti-sticking die structure according to claim 6, characterized in that, The feeding plate is provided with a cutting insert and a cutting opening. The feeding hole is provided on the cutting insert, the cutting opening is directly opposite the first punch, and the floating insert is provided inside the cutting opening.

8. The punching and blanking anti-sticking die structure according to claim 1, characterized in that, The unloading mechanism further includes a ejector pin, an ejector pin fixing block, and a guide rod. The elastic element includes a spring. The ejector pin is connected below the floating insert. The ejector pin is mounted on the ejector pin fixing block. A guide rod is provided through the ejector pin fixing block. A spring is sleeved on the guide rod. The spring is located below the ejector pin fixing block.

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