A plate spring punch riveting die

Abstract

This utility model provides a leaf spring riveting die, including a punch press, an upper die assembly, and a lower die assembly. The upper die assembly includes a punch seat mounted on the punch press die shank and a rivet punch detachably mounted on the punch seat. The lower die assembly includes a lower template mounted on the punch press worktable and a positioning seat mounted on the lower template. This die, through optimized design of the riveting positioning, allows for the customization of different specifications of riveting positioning seats according to product riveting requirements. The riveting positioning seats can accommodate both forward and reverse riveting products, achieving universality during riveting. The only difference lies in the placement direction of the clamp: clamp facing upwards indicates forward riveting, and clamp facing downwards indicates reverse riveting. Because forward and reverse riveting are universal and quick changeover is possible, continuous riveting production is possible, greatly improving the production efficiency of leaf spring riveting clamps. It can meet the mass production needs of all current leaf spring riveting clamps of this type.

Description

Technical Field

[0001] This utility model relates to the field of leaf spring processing mold technology, specifically a leaf spring punching and riveting mold. Background Technology

[0002] Automotive leaf springs are an important component of automotive suspension. They are elastic beams composed of several alloy leaf springs of equal width but unequal length. Clamps need to be installed on the individual leaf springs to fix multiple leaf springs together.

[0003] Currently, domestic leaf spring riveting clamps are divided into forward and reverse riveting clamps. Forward riveting clamps generally have a positioning groove machined on the lower template. A hemispherical rivet positioning mold is inserted into the middle of the positioning groove, and a side positioning is installed on one side of the template. During riveting, the rivet is inserted into the clamp and placed into the hemispherical groove mold. The positioning groove limits the position of the clamp, and the side positioning limits the leaf spring, thus enabling riveting. Reverse riveting clamps, because the clamp is below the leaf spring, generally involve raising the bottom mold to elevate the spring and clamp. Due to the difficulty in accurate positioning during riveting and the blind spots in visual inspection, the riveted clamps often become misaligned. Misaligned clamps and springs require drilling out the rivet and re-riveting, resulting in low production efficiency. Therefore, there is an urgent need for a leaf spring riveting clamp mold that can be used for both forward and reverse riveting to improve production efficiency and riveting quality. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a mold for continuous production of leaf springs with forward and reverse riveting clamps, so as to solve the problems mentioned in the background art.

[0005] The technical problem solved by this utility model is achieved by the following technical solution: a leaf spring punching and riveting die, comprising: punch; Upper die assembly; the upper die assembly includes a punch seat mounted on the punch press die shank and a rivet punch detachably mounted on the punch seat; The lower die assembly includes a lower die plate mounted on the punch press workbench and a positioning seat mounted on the lower die plate. The positioning seat has a limiting plate on both sides at one end for positioning the leaf spring, and a limiting groove on both sides for limiting the rivet. The positioning seat has a die hole in the middle, and a bottom module is installed inside the die hole.

[0006] As a further embodiment of this utility model: The lower template is provided with corner plates around its perimeter, and a pressure plate is fixedly provided on the punch press worktable. One side of the pressure plate rests against the corner plates around the lower template, and the other side is fixedly installed on the punch press worktable by bolts to press the lower template onto the punch press worktable.

[0007] As a further embodiment of this utility model: The lower template has a countersunk hole at its center, and the lower end of the positioning seat has a stepped cylinder. The positioning seat is inserted into the countersunk hole through the cylinder to accurately position the positioning seat.

[0008] As a further embodiment of this utility model: The upper end of the positioning seat has a square structure, and the limiting plates are vertically arranged on both sides of the positioning seat. A clamping groove for accommodating the leaf spring is formed between the two limiting plates to position the leaf spring. The limiting groove is arranged on the adjacent side of the limiting plate.

[0009] As a further embodiment of this utility model: The bottom module is a cylindrical structure and is embedded in the mold hole. The bottom module has a hemispherical recess at the center of the upper end to position the hemispherical head of the rivet.

[0010] As a further embodiment of this utility model: The lower end of the punch seat is integrally provided with a cylindrical body, the outer end of the cylindrical body is provided with an external thread, and the inner end of the cylindrical body is provided with a cylindrical hole. The upper end of the rivet punch is integrally provided with a column, which is inserted into the through hole and fixed to the punch seat by a locking nut.

[0011] As a further embodiment of this utility model: The locking nut has internal threads and is fitted onto the outer ends of the cylinder and rivet punch. The upper end of the locking nut is threaded to the cylinder, and the lower outer end of the column abuts against the inside of the locking nut to fix the column to the cylinder. The locking nut has an annular groove on its outer side, and the locking nut has knurled threads on both sides of the groove to increase the friction for rotation. The groove has annularly distributed insertion holes to facilitate the insertion of a wrench into the insertion holes to tighten the locking nut.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the positioning seat is installed in the countersunk hole of the lower template by embedding the cylindrical body to accurately position the positioning seat, and facilitates the quick assembly and disassembly of the positioning seat. Thus, different positioning seats can be customized according to different product requirements to meet the riveting requirements and quick changeover needs of the product.

[0013] The positioning seat has limiting plates on both sides to position the leaf spring, and a limiting groove is also provided on one side of the positioning seat to limit the clamp, so as to fix the clamp when riveting in reverse, providing the accuracy and stability of clamp placement, thereby reducing the generation of waste.

[0014] This mold, through optimized design of rivet positioning, allows for the customization of rivet positioning seats of different specifications according to product rivet requirements. The rivet positioning seats can accommodate both forward and reverse rivet products, achieving universality during rivet operation. The only difference lies in the placement direction of the clamps: clamps facing upwards indicate forward rivet operation, while clamps facing downwards indicate reverse rivet operation. Because forward and reverse rivet operation is applicable and quick changeover is possible, continuous rivet production can be achieved, greatly improving the production efficiency of leaf spring rivet clamps. It can meet the mass production needs of all current leaf spring rivet clamps of this type. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the positioning seat structure of this utility model; Figure 3 This is a schematic diagram of the locking nut structure of this utility model; Figure 4 This is a schematic diagram of the rivet punch structure of this utility model; The markings in the diagram are: 1. Punch seat; 2. Rivet punch; 3. Lower template; 4. Positioning seat; 5. Bottom module; 6. Locking nut; 11. Cylinder; 21. Column; 31. Angle plate; 41. Limiting plate; 42. Limiting groove; 43. Cylinder; 61. Groove; 62. Insertion hole. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0017] like Figure 1 As shown, this embodiment provides a leaf spring riveting die, including a punch press, an upper die assembly, and a lower die assembly. The upper die assembly includes a punch seat 1 mounted on the punch press die shank and a rivet punch 2 detachably mounted on the punch seat 1. The lower die assembly includes a lower die plate 3 mounted on the punch press worktable and a positioning seat 4 mounted on the lower die plate 3. The positioning seat 4 has limiting plates 41 on both sides at one end for positioning the leaf spring, and limiting grooves 42 on both sides for limiting the rivet. The positioning seat 4 has a die hole in the middle, and a bottom die plate 5 is installed inside the die hole.

[0018] like Figure 1 As shown, in this embodiment, corner plates 31 are distributed around the lower template 3, and a pressure plate is fixedly provided on the punch press worktable. One side of the pressure plate abuts against the corner plates 31 around the lower template 3, and the other side is fixedly installed on the punch press worktable by bolts to press the lower template 3 onto the punch press worktable.

[0019] The lower template 3 has a countersunk hole at its center, and the lower end of the positioning seat 4 has a stepped cylinder 43. The positioning seat 4 is inserted into the countersunk hole through the cylinder 43 to accurately position the positioning seat 4.

[0020] Specifically, the positioning seat 4 has different specifications, and the size of the clamps and leaf springs of each specification is different. The rivet positioning seat 4 has different settings for different clamps and leaf springs. The cylinder 43 and the countersunk hole at the center of the lower template 3 are matched for installation to accurately position the positioning seat 4.

[0021] like Figure 2 As shown, in this embodiment, the upper end of the positioning seat 4 has a square structure, and the limiting plate 41 is vertically arranged on both sides of the positioning seat 4. A clamping groove for accommodating the leaf spring is formed between the two limiting plates 41 to position the leaf spring. The limiting groove 42 is arranged on the adjacent side of the limiting plate 41.

[0022] The bottom module 5 is a cylindrical structure 43. The bottom module 5 is embedded in the mold hole. The upper center of the bottom module 5 is provided with a hemispherical recess 51 for positioning the hemispherical head of the rivet.

[0023] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the lower end of the punch seat 1 is integrally provided with a cylindrical body 11, the outer end of the cylindrical body 11 is provided with an external thread, the inner end of the cylindrical body 11 is provided with a cylindrical hole, the upper end of the rivet punch 2 is integrally provided with a column 21, the column 21 is inserted into the through hole and fixed on the punch seat 1 by a locking nut 6.

[0024] The locking nut 6 has internal threads and is sleeved on the outer end of the cylinder 11 and the rivet punch 2. The upper end of the locking nut 6 is threaded to the cylinder 11, and the lower end of the column 21 abuts against the inside of the locking nut 6 to fix the column 21 to the cylinder 11. The locking nut 6 has an annular groove 61 on its outer side, and the locking nut 6 has knurled threads on both sides of the groove 61 to increase the friction force for rotation. The groove 61 has annularly distributed insertion holes 62 to facilitate the insertion of a wrench into the insertion holes 62 to tighten the locking nut 6.

[0025] The working principle of this utility model is as follows: Insert the rivet into the rivet hole of the clamp, then insert the clamp and rivet together into the rivet hole of the leaf spring, and then place the combination of clamp, rivet and leaf spring into the positioning seat 4. When the leaf spring rivet clamp is riveted in the forward direction, the leaf spring is clamped in the clamping groove, the clamp is abutted against one side of the limiting plate 41, and the hemispherical head of the rivet is positioned through the hemispherical socket of the bottom module 5.

[0026] When the leaf spring rivet clamp is riveted in the reverse direction, the leaf spring is clamped in the clamping groove, the clamp is inserted into the positioning groove, and the hemispherical head of the rivet is positioned through the hemispherical socket of the bottom module 5.

[0027] Activate the foot switch to stamp and rivet the rivets, remove the leaf spring, and after the leaf spring rivet clamp passes inspection, continue to place the clamp, rivet, and leaf spring assembly into the positioning groove to continuously rivet the second leaf spring rivet clamp. Repeat this process to achieve mass production.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents. It should be noted that, in this document, the use of relational terms such as "first" and "second" is merely used to distinguish one entity or operation from another, and does not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In the absence of further restrictions, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A blanking and riveting die for a leaf spring, characterized by: include: punch; Upper die assembly; the upper die assembly includes a punch seat (1) mounted on the punch press die shank and a rivet punch (2) detachably mounted on the punch seat (1); The lower die assembly includes a lower template (3) mounted on the punch press workbench and a positioning seat (4) mounted on the lower template (3). The positioning seat (4) has a limiting plate (41) on both sides of one end for positioning the leaf spring. The positioning seat (4) has a limiting groove (42) on both sides for limiting the rivet. The positioning seat (4) has a die hole in the middle, and a bottom module (5) is installed inside the die hole.

2. A blanking and riveting die for a leaf spring according to claim 1, characterized in that: The lower template (3) is provided with corner plates (31) around its perimeter. A pressure plate is fixedly provided on the punch press worktable. One side of the pressure plate abuts against the corner plates (31) around the lower template (3), and the other side is fixedly installed on the punch press worktable by bolts to press the lower template (3) onto the punch press worktable.

3. A blanking and riveting die for a leaf spring according to claim 2, characterized in that: The lower template (3) has a countersunk hole at its center, and the lower end of the positioning seat (4) has a stepped cylinder (43). The positioning seat (4) is inserted into the countersunk hole through the cylinder (43) to accurately position the positioning seat (4).

4. A blanking and riveting die for a leaf spring according to claim 3, characterized in that: The upper end of the positioning seat (4) is a square structure. The limiting plate (41) is vertically arranged on both sides of the positioning seat (4). A clamping groove for accommodating the leaf spring is formed between the two limiting plates (41) to position the leaf spring. The limiting groove (42) is arranged on the adjacent side of the limiting plate (41).

5. A board spring punch rivet die according to claim 4, characterized in that: The bottom module (5) is a cylindrical (43) structure. The bottom module (5) is embedded in the mold hole. A hemispherical recess (51) is provided at the center of the upper end of the bottom module (5) to position the hemispherical head of the rivet.

6. A board spring punch rivet die according to claim 1, characterized in that: The lower end of the punch seat (1) is integrally provided with a cylindrical body (11), the outer end of the cylindrical body (11) is provided with an external thread, and the inner end of the cylindrical body (11) is provided with a cylindrical hole. The upper end of the rivet punch (2) is integrally provided with a column (21), the column (21) is inserted into the through hole and fixed on the punch seat (1) by a locking nut (6).

7. A blanking and riveting die for a leaf spring according to claim 6, characterized in that: The locking nut (6) has internal threads and is sleeved on the outer end of the cylinder (11) and the rivet punch (2). The upper end of the locking nut (6) is threadedly connected to the cylinder (11), and the lower end of the column (21) abuts against the inside of the locking nut (6) to fix the column (21) on the cylinder (11). The locking nut (6) has an annular groove (61) on its outer side, and the locking nut (6) has knurled threads on both sides of the groove (61). The groove (61) has annularly distributed insertion holes (62).

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