Positioning structure of stripping die

Abstract

The utility model discloses a positioning structure of a stripping die, which comprises an upper die stripping component and a lower die emptying component, the lower die emptying component comprises a lower die plate and a lower die holder which are detachably mounted, the lower die plate is provided with a first material guide plate and a second material guide plate, the first material guide plate and the second material guide plate are used for connecting a material belt, the material belt is provided with a guide hole, and the guide hole is communicated with the lower die holder. A plurality of mounting holes of an inverted-T-shaped structure are linearly distributed in the lower die plate, positioning pins are mounted in the mounting holes and extend upwards to abut against the lower end face of the material belt, and positioning holes corresponding to the guide holes are formed in the upper end face of the positioning pins. Positioning precision is ensured and cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mold positioning, in particular to a positioning structure of a stripping mold. Background Art

[0002] Stamping dies are an integral part of sheet metal processing and are widely used in a variety of fields, including automotive, aerospace, and home appliance production. They work by applying external force through a press, causing the metal material to plastically deform within the die, thereby forming the desired part shape.

[0003] Stamping is required during stamping die processing, and the product needs to be positioned before stamping. The Chinese patent document discloses "CN213793902U, crescent-shaped stripping device" by arranging a crescent stripping part and a guide needle on the stripping plate, and providing a lower template hole portion that can accommodate the guide needle in the lower template. By utilizing the elastic deformation of the elastic part and the guiding effect of the guide needle, the guide needle is inserted into the lower template hole portion when the mold is closed, and the crescent part is retracted and flush with the stripping plate. When the mold is opened, the crescent part is pushed out by the elastic part to abut against the material strip, and the material strip is pressed down to prevent the guide needle from lifting the material strip together, thereby achieving smooth demolding of the material strip.

[0004] However, the device positions the guide needle by setting a lower template hole on the lower template. After the guide needle is positioned for a long time, the lower template will be worn, resulting in lower positioning accuracy of the mold. If the lower template is directly replaced, the cost will increase. Utility Model Content

[0005] The purpose of the present invention is to provide a positioning structure for a stripping die to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A positioning structure for a stripping mold includes an upper mold stripping assembly and a lower mold discharge assembly, the lower mold discharge assembly includes a detachable lower mold plate and a lower mold base, the lower mold plate is provided with a first material guide plate and a second material guide plate, the first material guide plate and the second material guide plate are used to connect the material strip, the material strip is provided with a guide hole, and the lower mold plate is linearly distributed with a number of mounting holes in a convex structure, and positioning pins are installed in several of the mounting holes, the positioning pins extend upward and abut against the lower end surface of the material strip, and the upper end surface is provided with a positioning hole corresponding to the guide hole.

[0008] Furthermore, a spring is provided in the mounting hole, one end of the spring abuts against the lower end surface of the positioning pin, and the other end abuts against the upper end surface of the lower die base.

[0009] Furthermore, the positioning pin is provided with an external thread, and is rotatably connected to a nut via the external thread, and the upper end surface of the nut can abut against the step of the mounting hole.

[0010] Furthermore, four guide holes 1 are provided on the lower end surface of the upper mold stripping assembly, and four guide holes 2 corresponding to the guide holes 1 are provided on the upper end surface of the lower mold plate, and guide columns are inserted into the guide holes 2.

[0011] Furthermore, the guide column is made of hard plastic.

[0012] Beneficial effects of the utility model:

[0013] The utility model realizes support and precise positioning of the material strip by providing an upper mold stripping assembly in combination with a lower mold discharge assembly having first and second material guide plates including convex shaped positioning pins. The material strip is guided by the two material guide plates to smoothly enter the working area of ​​the mold along a predetermined path, ensuring that the material will not deviate during the feeding process. There is no need to manually adjust the position of the material strip, thereby improving processing efficiency. The replaceable positioning pins ensure positioning accuracy and reduce costs.

[0014] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : An overall structural diagram of an implementation scheme of the present utility model.

[0016] Figure 2 : Material strip structure diagram of the present utility model.

[0017] Figure 3 : An exploded view of a lower mold discharge assembly according to an embodiment of the present invention.

[0018] Figure 4 : A structural cross-sectional view of an embodiment of the present invention.

[0019] Figure 5 : Figure 4 Enlarged view of the structure of part A

[0020] Figure 6 : Structural sectional view of embodiment 2 of the present utility model.

[0021] Figure 7 : Figure 6 Enlarged view of the structure of part B.

[0022] Figure 8 :Structural explosion of the second embodiment of the present invention Figure 1 .

[0023] Figure 9:Structural explosion of the second embodiment of the present invention Figure 2 .

[0024] Figure 10 : Exploded view of the upper die stripping assembly of the present invention.

[0025] Figure 11 : Bottom view of the upper mold stripping assembly of the present utility model.

[0026] Figure numerals: 1. Upper mold stripping assembly; 2. Lower mold discharge assembly; 4. Lower mold plate; 5. Lower mold base; 6. Material strip; 7. First material guide plate; 8. Second material guide plate; 11. Guide hole one; 41. Mounting hole; 42. Positioning pin; 43. Spring; 44. Nut; 45. Guide hole two; 46. Guide column; 61. Guide hole; 421. Positioning hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] Please refer to Figure 1-11 ;

[0029] Embodiment one, a positioning structure of a stripping die, comprising an upper die stripping assembly 1 and a lower die feeding assembly 2, the upper die stripping assembly 1 is used for stripping the material belt 6, referring to the Chinese patent document "CN213793902U, crescent-shaped stripping device", according to the content of the specification "the upper die of the mold closes downward, the guide pin is inserted into the guide hole of the material belt, the crescent-shaped stripping part originally protrudes from the bottom wall, the upper die of the mold continues to close downward, the crescent-shaped stripping part retreats upward to be flush with the stripping plate, the punch passes through the lower dead point position, the upper die of the mold opens upward, the crescent-shaped stripping part can be pushed out from the stripping plate by the elastic element at the upper end and other supporting components, the crescent-shaped stripping part pushes the material belt downward, and the guide pin exits from the guide hole of the material belt", the lower die feeding assembly 2 comprises a detachable lower die plate 4 and a lower die seat 5, the first guide plate 7 and the second guide plate 8 are arranged on the lower die plate 4, the first guide plate 7 and the second guide plate 8 are used for connecting the material belt 6, the material belt 6 is guided to enter the working area of the mold along the predetermined path stably through the two guide plates, it is ensured that the material does not deviate during feeding, manual adjustment of the position of the material belt 6 is not required, the processing efficiency is improved, the guide hole 61 is arranged on the material belt 6, a plurality of convex-shaped installation holes 41 are linearly distributed on the lower die plate 4, a plurality of positioning pins 42 are installed in the installation holes 41, the positioning pins 42 extend upward and abut against the lower end surface of the material belt 6, and are used for supporting the material belt 6, and the upper end surface of the positioning pin 42 is provided with a positioning hole 421 corresponding to the guide hole 61, when the upper die stripping assembly 1 and the lower die feeding assembly 2 are closed, the guide pin passes through the guide hole 61 and the positioning hole 421 in sequence, thereby guiding and positioning the material belt 6 accurately, ensuring that the position of the material belt 6 is accurate and correct during each processing, ensuring the consistency and quality of batch processing of products, one end of the positioning pin 42 abuts against the step of the installation hole 41, and the other end abuts against the lower die seat 5, the lower die plate 4 and the lower die seat 5 are fixed by screw locking, preferably, when the positioning accuracy is low due to the wear of the positioning pin 42 caused by frequent positioning, the lower die plate 4 and the lower die seat 5 can be disassembled, so that the positioning pin can be disassembled and replaced, ensuring the positioning accuracy and reducing the cost.

[0030] Specifically, first, the first guide plate 7 and the second guide plate 8 in the lower die feeding assembly 2 guide the material belt 6 to enter the predetermined position, the guide hole 61 on the material belt 6 is aligned with the positioning pin 42 on the lower die plate 4, when the mold is closed, the guide pin in the upper die stripping assembly 1 passes through the guide hole 61 of the material belt 6 and enters the positioning hole 421 of the positioning pin 42, completing the accurate positioning of the material belt 6, then, the crescent-shaped stripping part temporarily retreats to be flush with the stripping plate under the mold closing pressure, as the punch passes through the lower dead point, the mold is opened, the crescent-shaped stripping part is pushed out under the action of the elastic element, the material belt 6 is pushed out from the stripping plate, the guide pin exits from the guide hole 61, and one processing cycle is completed.

[0031] In the second embodiment, the mounting hole 41 is also provided with a spring 43, one end of the spring 43 is against the lower end surface of the locating pin 42, and the other end is against the upper end surface of the lower mold base 5. In the case of an operational error, the guide needle and the guide hole 61 are not aligned, and the guide needle will press the material strip 6, thereby indirectly pressing the locating pin 42, causing the spring 43 to shrink, and prevent the guide needle, the material strip 6 and the locating pin from being crushed. Due to the constraint of the mounting hole 41, the position of the locating pin 42 will not be offset. Once the guide needle is aligned with the guide hole 61, the spring 43 will return to its original state and push the locating pin 42 to move upward. Select a suitable locating pin 42, and limit the rising height of the locating pin 42 by the step of the mounting hole 41, so that the locating pin 42 will only move up to a position where the upper end surface is flush with the lower end surface of the material strip 6, to avoid the locating pin 42 rising too high and bending the material strip 6.

[0032] In this embodiment, the positioning pin 42 is provided with an external thread, and is connected to a nut 44 by rotation through the external thread. The upper end surface of the nut 44 can be against the step of the mounting hole 41. By rotating the nut 44, the position of the nut 44 on the positioning pin 42 is adjusted, thereby adjusting the maximum extension height of the positioning pin 42, so as to support the material strips 6 of different thicknesses.

[0033] In this embodiment, four guide holes 11 are provided on the lower end face of the upper mold stripping assembly 1, and four guide holes 2 45 corresponding to the guide holes 11 are provided on the upper end face of the lower template 4. Guide columns 46 are inserted in the guide holes 2 45. When the mold is closed, positioning is performed through the guide holes 11 and the guide columns 46. The guide columns 46 are made of hard plastic. If misalignment occurs during mold closing, the positioning columns will be broken, thereby achieving the purpose of reminding the operator of mold misalignment. In addition, the guide columns 46 are directly inserted into the inverted guide holes 2 45, and are not designed to be integrated with the lower template 4. Therefore, after misalignment occurs and the guide columns 46 are broken, new guide columns 46 can be replaced and reinserted for use.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0035] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A positioning structure for a stripping die, comprising an upper die stripping assembly (1) and a lower die discharge assembly (2), wherein the lower die discharge assembly (2) comprises a detachably mounted lower die plate (4) and a lower die base (5), characterized in that: The lower template (4) is provided with a first material guide plate (7) and a second material guide plate (8), the first material guide plate (7) and the second material guide plate (8) are used to connect the material strip (6), the material strip (6) is provided with a guide hole (61), and the lower template (4) is linearly distributed with a plurality of mounting holes (41) in a convex structure, and positioning pins (42) are installed in the plurality of mounting holes (41), and the positioning pins (42) extend upward and abut against the lower end surface of the material strip (6), and the upper end surface thereof is provided with a positioning hole (421) corresponding to the guide hole (61).

2. A positioning structure for a stripping die according to claim 1, characterized in that: A spring (43) is also provided in the mounting hole (41), one end of the spring (43) abuts against the lower end surface of the positioning pin (42), and the other end abuts against the upper end surface of the lower die base (5).

3. A positioning structure for a stripping die according to claim 2, characterized in that: The positioning pin (42) is provided with an external thread and is rotatably connected to a nut (44) via the external thread. The upper end surface of the nut (44) can abut against the step of the mounting hole (41).

4. The positioning structure of a stripping die according to claim 1, characterized in that: The lower end surface of the upper mold stripping assembly (1) is provided with four guide holes (11), and the upper end surface of the lower mold plate (4) is provided with four guide holes (45) corresponding to the guide holes (11), and guide columns (46) are inserted into the guide holes (45).

5. A positioning structure for a stripping die according to claim 4, characterized in that: The guide column (46) is made of hard plastic.

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