Automobile circuit wiring continuous stamping die

Abstract

This utility model relates to a continuous stamping die for automotive circuit wiring, including an upper die and a lower die. The area between the upper and lower dies is a processing area, which is divided into a punching area, a trimming area, a bending area, and a blanking area along the conveying direction of the metal strip. A guide float extending from the bending area to the blanking area is provided in the middle of the lower die. The guide float can move up and down relative to the lower die. A guide groove extending along the conveying direction is provided on the upper part of the guide float. A guide pressure block is provided on each side of the guide float on the lower die. Several bending dies are provided on both sides of the bending area. The bending dies and the guide pressure blocks are staggered in the horizontal plane. The guide pressure blocks are located above the conveying position of the metal strip and move up and down synchronously with the guide float. This utility model relies on the guide groove and guide pressure blocks for positioning, ensuring that the process bend does not deviate from the range of the guide groove, maintaining stamping accuracy, meeting the material guiding requirements of circuit wiring, ensuring accurate stamping position, uniform circuit wiring width, and stable resistance.

Description

Technical Field

[0001] This utility model relates to the field of metal stamping technology, and in particular to a continuous stamping die for automotive circuit wiring. Background Technology

[0002] In automotive electronic systems, traces are used to connect electronic components and transmit electrical signals or power. For example... Figure 1 The circuit trace 100 (actually a double-connected structure with corresponding structural relationships) includes an integrally formed middle portion 101, a first bent end 102, and a second bent end 103, which can be formed by stamping metal strip. The middle portion 101 has a planar strip structure, and the first bent end 102 and the second bent end 103 are located at the two ends of the middle portion 101, respectively, and have a three-dimensional bent structure. Because the circuit trace 100 can be regarded as a conductor with the same cross-section, the overall width of the circuit trace 100 should also be relatively uniform. Therefore, during the processing, the middle width portion of the metal strip is used to form the middle portion 101 and maintain the connection relationship of the metal strip, while the two side portions are used for trimming and bending to form the two bent ends.

[0003] Chinese patent CN113477829B discloses a method for forming a fuel tank ground wire. The fuel tank ground wire processed by this method has a similar function and structure, except that it has a three-dimensional structure with holes at both ends. During continuous stamping, the punch core pulling itself can balance the lateral component force in the deformation, so there will be no serious material guide deviation problem.

[0004] However, in this product, the two sides of the circuit trace 100 are also strip structures and will be bent. During the bending, a component force in the left and right directions will be generated, which will cause the conveying direction of the metal strip to deviate from the original straight line. Therefore, how to guide the material becomes an important issue. Otherwise, the metal strip will be deviated and the front and rear contours will not be parallel, which will make the width of the circuit trace 100 uneven, causing changes in resistance and affecting product quality.

[0005] Therefore, it is necessary to improve the structure of the continuous stamping die to solve the above problems. Utility Model Content

[0006] The main purpose of this utility model is to provide a continuous stamping die for automotive circuit wiring, which can meet the material guiding requirements of circuit wiring, make the stamping position accurate, and make the circuit wiring width uniform and the resistance stable.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a continuous stamping die for automotive circuit wiring, comprising an upper die and a lower die, wherein the area between the upper die and the lower die is a processing area, which is divided into a punching area, a trimming area, a bending area, and a blanking area along the conveying direction of the metal strip; a guide float extending from the bending area to the blanking area is provided in the middle of the lower die, the guide float being able to rise and fall relative to the lower die, and a guide groove extending along the conveying direction is provided on the upper part of the guide float, the guide groove being used to guide the process bends formed by the up and down bending of the metal strip; a guide pressure block is provided above the guide float in the lower die, and several bending dies are provided on both sides of the bending area, the bending dies being offset from the guide pressure block in the horizontal plane, the guide pressure block and the guide float being raised and lowered synchronously, the guide pressure block causing the metal strip to be close to the guide float and preventing the process bends from detaching from the guide groove.

[0008] Specifically, the cutting area includes at least two stations, with a process cutting die at the first station and a process bending die at the second station. The process cutting die, the process bending die, and the guide float are distributed sequentially along the conveying direction. The process cutting die is used to cut a U-shaped hole in the middle of the metal strip. The process cutting die is used to bend the material inside the U-shaped hole downwards into a process bending section. The width of the process bending section matches the width of the guide groove.

[0009] Specifically, there are two material guiding blocks, which are located on the upper sides of the material guiding float.

[0010] Furthermore, the top view of the guide block is T-shaped, including a vertically connected longitudinal part and a transverse part. The longitudinal part is along the conveying direction, and the transverse part is perpendicular to the conveying direction. The inner end of the transverse part is connected to the middle position of the longitudinal part, and the outer root of the transverse part is located outside the conveying range of the metal strip.

[0011] Furthermore, the lower part of the transverse portion is provided with a clearance groove.

[0012] Specifically, the feed end of the lower mold is provided with a guide groove.

[0013] Specifically, the lower die's discharge end is equipped with a discharge slide plate.

[0014] Specifically, multiple sets of floating columns are provided on both sides of the lower die, and the inner side of the floating columns is provided with a groove to restrict the position of the metal strip edge. All floating columns and the guide float move up and down synchronously. Trimming dies are provided on both sides of the trimming area, and the floating columns are distributed on the outside of the station where the trimming die is located and the station in front of it.

[0015] The beneficial effects of this utility model's technical solution are: This invention relies on the cooperation between the guide groove and the process bend section to control the conveying direction of the metal strip during the bending and blanking steps. The metal strip is limited by the guide pressure block above, so that the process bend section does not leave the range of the guide groove, maintaining the stamping accuracy, meeting the material guiding requirements of circuit wiring, making the stamping processing position accurate, and making the circuit wiring width uniform and the resistance stable. Attached Figure Description

[0016] Figure 1 A 3D diagram of the circuit routing; Figure 2 This is a diagram illustrating the transformation process of the metal strip. Figure 3 This is a diagram showing the relative position of the metal strip on the lower die of a continuous stamping die for automotive circuit wiring. Figure 4 This is a three-dimensional view of the lower mold; Figure 5 for Figure 4 A magnified view of a portion of position A in the middle; Figure 6 This is a diagram showing the height relationship between the metal strip, the guide float, and the guide pressure block.

[0017] The numbers in the diagram represent: 100 - Circuit trace, 101 - Middle section, 102 - First bend end, 103 - Second bend end; 200-Lower die, 1-Punching area, 2-Trimming area, 21-Process punching die, 22-Process bend die, 23-Trimming die, 3-Bending area, 31-Guiding float, 311-Guiding groove, 32-Guiding pressure block, 321-Longitudinal part, 322-Transverse part, 3221-Allowing groove, 33-Bending die, 4-Unloading area, 5-Guiding groove body, 6-Unloading slide plate, 7-Floating column; 300 - Metal strip, 301 - U-shaped hole, 302 - Process bend, 303 - Positioning hole. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments.

[0019] Example: like Figures 2 to 4 As shown, the present invention provides a continuous stamping die for automotive circuit wiring, including an upper die (not shown) and a lower die 200. The area between the upper die and the lower die 200 is a processing area, which is divided into a punching area 1, a trimming area 2, a bending area 3 and a blanking area 4 along the conveying direction of the metal strip 300.

[0020] The punching area 1 is equipped with several punching dies for punching positioning holes in the metal strip 300; the trimming area 2 is equipped with several trimming dies 23 for cutting out partial edges of the bent ends; the bending area 3 is equipped with several bending dies 33 for bending the ends; and the blanking area 4 is equipped with blanking dies for cutting the circuit traces 100 from the metal strip 300. In the figure, the lower half (lower die 200 part) of each die (punching die, trimming die 23, bending die 33, blanking die) refers to the whole.

[0021] like Figure 4 As shown, the lower die 200 has a guide groove 5 at the feeding end and a discharge slide 6 at the discharging end.

[0022] The metal strip 300 enters the processing area through the guide trough 5, which guides the metal strip 300 to move in a predetermined conveying direction. After the metal strip 300 completes all processing, the waste material is discharged from under each punching die (including the punching die in the punching area 1, the trimming die 23 in the trimming area 2, and the blanking die in the blanking area 4), while the processed circuit wiring 100 slides from the blanking slide plate 6 into the collection box.

[0023] like Figures 4 to 6 As shown, the lower die 200 has a guide float 31 extending from the bending area 3 to the dropping area 4 in the middle. The guide float 31 can rise and fall relative to the lower die 200. The upper part of the guide float 31 has a guide groove 311 extending along the conveying direction. The guide groove 311 is used to guide the process bend 302 formed by the up and down bending of the metal strip 300. The lower die 200 has a guide pressure block 32 above the guide float 31. Several bending dies 33 are provided on both sides of the bending area 3. The bending dies 33 and the guide pressure block 32 are staggered in the horizontal plane. The guide pressure block 32 and the guide float 31 rise and fall synchronously. The guide pressure block 32 makes the metal strip 300 close to the guide float 31 and prevents the process bend 302 from falling off the guide groove 311.

[0024] Because the edges of the metal strip 300 can no longer serve as a positional reference during the bending and blanking steps, a positioning hole 303 must be set in the middle of the metal strip 300 at the beginning of the stamping process (an auxiliary positioning hole will also be set near the edge of the metal strip 300 as a processing reference for punching and trimming, but this is not the focus of this invention). For guiding purposes, a process bend 302 needs to be made on the metal strip 300 near the positioning hole 303. The guide float 31 controls the conveying direction of the metal strip 300 during the bending and blanking steps by cooperating with the guide groove 311 and the process bend 302. However, during the conveying process, the process bend 302 needs to be kept within the guide groove 311. Otherwise, the process bend 302 will be deflected by the lower die 200 during the conveying process and lose its guiding function. Therefore, the upper part of the metal strip 300 needs to be constrained by the guide block 32. As long as the process bend 302 does not leave the range of the guide groove 311, the conveying direction is relatively accurate. The positioning hole 303 can also continuously serve as the position reference for station switching to maintain stamping accuracy, meet the material guiding requirements of the circuit wiring 100, make the stamping processing position accurate, and make the width of the circuit wiring 100 uniform and the resistance stable.

[0025] like Figure 4 As shown, multiple sets of floating columns 7 are provided on both sides of the lower mold 200. The inner side of the floating column 7 is provided with a slot (not marked) to restrict the edge position of the metal strip 300. All floating columns 7 and the guide float 31 move up and down synchronously. The two sides of the trimming area 2 are provided with trimming molds 23. The floating columns 7 are distributed on the station where the trimming mold 23 is located and on the outside of the station in front of it.

[0026] Because the metal strip 300 bends at varying heights on both sides during the entire processing, it needs to be raised to a certain height and then moved horizontally to ensure it can be delivered to the next station. This prevents the lower die 200 from misaligning the already bent position. The metal strip 300 moves in the progressive die in a cyclical motion of descending, rising, and translating. Each descent corresponds to one die closing, each rise to one die opening, and each translation moves the metal strip 300 one station backward. Since the edges of the metal strip 300 are intact before the trimming is completed, the edges can be used for width positioning and punching height control in the early stages of processing. The slots restrict the upper and lower surfaces of the metal strip 300, and since the metal strip 300 is clamped between the two slots, the entire metal strip 300 rises and falls with the movement of the floating column 7. The guide float 31 also serves to raise the metal strip 300, so the floating column 7 and the guide float 31 must rise and fall at the same rhythm.

[0027] like Figure 4As shown, the cutting area 2 includes at least two stations, with a process cutting die 21 at the first station and a process bending die 22 at the second station. The process cutting die 21, the process bending die 22 and the guide float 31 are distributed sequentially along the conveying direction. The process cutting die 21 is used to cut a U-shaped hole 301 in the middle of the metal strip 300. The process cutting die 21 is used to bend the material inside the U-shaped hole 301 downward to form a process bending part 302. The width of the process bending part 302 matches the width of the guide groove 311.

[0028] The process cutting die 21 and the process bending die 22 are used to form the process bending portion 302 required for guiding the material. Because the process bending portion 302 is just flat material in the original position of the metal strip 300, a tongue-shaped structure (i.e., the part surrounded by the U-shaped hole 301) needs to be cut out first, and then bent. The width of the process bending portion 302 should be slightly smaller than the width of the guide groove 311 (less than 1 mm) so that the process bending portion 302 can smoothly enter the guide groove 311.

[0029] like Figure 4 and Figure 6 As shown, there are two material guiding blocks 32, which are located on the upper sides of the material guiding float 31 respectively.

[0030] The guide float 31 holds the metal strip 300 in a position relatively close to the middle. Therefore, in order to keep the metal strip 300 in close contact with the guide float 31, it is preferable to press the metal strip 300 down from both sides. This way, the metal strip 300 will not exceed the height on either the left or right side, causing the process bend 302 to detach from the guide groove 311.

[0031] like Figure 5 As shown, the top view of the guide block 32 is T-shaped, including a vertically connected longitudinal part 321 and a transverse part 322. The longitudinal part 321 is along the conveying direction, and the transverse part 322 is perpendicular to the conveying direction. The inner end of the transverse part 322 is connected to the middle position of the longitudinal part 321, and the outer root of the transverse part 322 is located outside the conveying range of the metal strip 300.

[0032] The longitudinal section 321 is a strip-shaped structure along the conveying direction, which increases the contact length of the metal strip 300 and helps ensure tight contact between the metal strip 300 and the guide float 31. The transverse section 322 is the connecting structure of the longitudinal section 321. Because the guide float 31 and the guide pressure block 32 need to move synchronously, they are generally connected as one unit inside the lower die 200 (for example, by using a lifting plate). Therefore, the guide pressure block 32 must extend above the metal strip 300, bypassing its movement range, hence the need for the transverse section 322.

[0033] like Figure 6As shown, the lower part of the horizontal portion 322 is provided with a clearance groove 3221.

[0034] The highest point of the first bend end 102 and / or the second bend end 103 on the circuit trace 100 may be higher than the position of the middle part 101. Since the middle part 101 is always flush with the conveying surface of the metal strip 300, the transverse part 322 may be provided with a clearance groove 3221 to avoid the material guide block 32 from knocking the first bend end 102 and / or the second bend end 103 out of place.

[0035] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A continuous stamping die for automobile circuit wiring, comprising an upper die and a lower die, a processing area between the upper die and the lower die, the processing area being divided into a punching area, a trimming area, a bending area and a blanking area along the conveying direction of a metal strip; characterized in that: The lower die has a guide float extending from the bending area to the dropping area in the middle. The guide float can move up and down relative to the lower die. The upper part of the guide float has a guide groove extending along the conveying direction. The guide groove is used to guide the process bend formed by the up and down bending of the metal strip. The lower die has a guide pressure block above the guide float. Several bending dies are provided on both sides of the bending area. The bending dies and the guide pressure block are offset in the horizontal plane. The guide pressure block and the guide float move up and down synchronously. The guide pressure block makes the metal strip close to the guide float and prevents the process bend from leaving the guide groove.

2. The progressive die for routing of automobile circuits as claimed in claim 1 wherein: The trimming area includes at least two stations, with a process cutting die at the first station and a process bending die at the second station. The process cutting die, the process bending die, and the guide float are distributed sequentially along the conveying direction. The process cutting die is used to cut a U-shaped hole in the middle of the metal strip. The process cutting die is used to bend the material inside the U-shaped hole downwards into a process bending section. The width of the process bending section matches the width of the guide groove.

3. The progressive die for routing of automotive circuits as claimed in claim 1 wherein: There are two material guiding blocks, located on both sides above the material guiding float.

4. The progressive die for routing of automotive circuits as claimed in claim 3 wherein: The top view of the guide block is T-shaped, including a vertically connected longitudinal section and a transverse section. The longitudinal section is along the conveying direction, and the transverse section is perpendicular to the conveying direction. The inner end of the transverse section is connected to the middle position of the longitudinal section, and the outer root of the transverse section is located outside the conveying range of the metal strip.

5. The continuous stamping die for automotive circuit wiring according to claim 4, characterized in that: The lower part of the transverse section is provided with a clearance groove.

6. The automotive circuit tracing progressive die of claim 1, wherein: The feed end of the lower mold is provided with a guide groove.

7. The automotive circuit tracing progressive die of claim 1, wherein: The lower mold is equipped with a discharge slide plate at its discharge end.

8. The automotive circuit tracing progressive die of claim 1, wherein: Multiple sets of floating columns are provided on both sides of the lower die. The inner side of the floating column is provided with a groove to restrict the position of the metal strip edge. All floating columns and the guide float move up and down synchronously. Trimming dies are provided on both sides of the trimming area. The floating columns are distributed on the outside of the station where the trimming die is located and the station in front of it.

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