Progressive stamping die for rear bracket of automobile seat

Abstract

The utility model discloses a stamping progressive die for a rear bracket of an automobile seat, which belongs to the field of automobile part manufacturing and comprises a lower die mounted on a machine table and an upper die mounted at a movable end of a stamping machine. The lower die comprises a progressive die base and a lower base plate which is fixedly installed at the bottom of the die base and used for being connected with a machine table, and a punching hole, an edge cutting hole, a bending groove and a cut-off groove are sequentially formed in the top face of the die base from the feeding end to the discharging end. The upper die comprises a tool apron and an upper padding plate which is fixedly installed on the top of the tool apron and used for being connected with the movable end of a punching machine. According to the automobile seat rear bracket stamping progressive die, through integrated continuous machining, the transfer, calibration and waiting time of materials among different stations is shortened, the machining efficiency is remarkably improved, the whole machining process is completed in the die, human intervention and errors are reduced, the size precision and consistency of products are improved, and therefore the yield is increased.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts manufacturing, and in particular to a continuous stamping die for a rear bracket of an automobile seat. Background Art

[0002] Auto parts manufacturing refers to the process of converting raw materials (such as metals, plastics, rubber, etc.) into various parts required for automobiles through a series of process steps.

[0003] The rear bracket of a car seat is an L-shaped sheet with a bend. Traditionally, the sheet is cut into blanks, then holes are punched at designated locations before being bent at a bending station. However, the entire process requires transferring the material to multiple stations, requiring repeated transfers, calibrations, and machining, impacting overall processing efficiency. Furthermore, due to multiple transfers and calibrations, as well as human interference, deviations between finished products are prone to occur, resulting in a low yield rate.

[0004] Therefore, the present application provides a continuous stamping die for a rear bracket of an automobile seat to solve the above problems. Utility Model Content

[0005] The present application provides a continuous stamping die for a rear bracket of an automobile seat, which aims to solve the problems of low efficiency and low yield of the existing processing method of the rear bracket of an automobile seat proposed in the background art.

[0006] To achieve the above objectives, the present application provides the following technical solutions: a continuous die for stamping a rear bracket of an automobile seat, comprising a lower die for mounting on a machine platform and an upper die for mounting on a movable end of a punching machine.

[0007] The lower die includes a progressive die base and a lower pad fixedly installed at the bottom of the die base for connecting to the machine. The top surface of the die base is provided with punching holes, trimming holes, bending grooves and truncation grooves in sequence from the feed end to the discharge end.

[0008] The upper die includes a tool holder and an upper pad fixedly mounted on the top of the tool holder for connecting to the movable end of the punching machine. Punches corresponding to the punching holes, the trimming holes, the bending grooves and the truncation grooves are fixedly mounted on the bottom surface of the tool holder.

[0009] Guide rods are located at the four corners of the bottom surface of the tool holder, and positioning holes for the guide rods are located at the four corners of the top surface of the mold base. This integrated, continuous processing reduces material transfer, calibration, and waiting time between different workstations, significantly improving processing efficiency. The entire processing process is completed within the mold, reducing human intervention and errors, improving product dimensional accuracy and consistency, and thus increasing the yield rate.

[0010] Preferably, the discharge end of the mold base has a discharge slope for guiding the discharge of the finished product.

[0011] Preferably, the bending groove extends to the outside of the discharge end of the mold base.

[0012] Preferably, the punching holes, the trimming holes and the truncation grooves all pass through the die base and the lower pad.

[0013] Preferably, the die base has a plurality of linearly distributed limit columns at positions on both sides of the plate corresponding to the feed end.

[0014] Preferably, a pre-load plate is provided below the knife holder for longitudinal movement and is slidably connected to the guide rod. The bottom end of the guide rod has a positioning rod with a diameter larger than that of the guide rod for preventing the pre-load plate from falling off. A compression spring is sheathed on the outside of the guide rod, with both ends respectively connected to the knife holder and the pre-load plate, wherein the positioning hole matches the size of the positioning rod.

[0015] Preferably, the pre-pressing plate has a clearance hole for the punch to pass through.

[0016] The continuous stamping die for the rear bracket of the automobile seat reduces the time for transferring, calibrating and waiting materials between different workstations through integrated continuous processing, significantly improving processing efficiency. The entire processing process is completed within the die, reducing human intervention and errors, improving the dimensional accuracy and consistency of the product, and thus increasing the yield rate.

[0017] In the continuous die for stamping the rear bracket of the car seat, before the punch starts stamping, the pre-pressing plate, under the action of the compression spring, is guided by the guide rod and the positioning rod to move downward and contact the plate. This contact process applies an initial and uniform pressure to the plate, allowing the plate to maintain better stability during the subsequent bending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a continuous die for stamping a rear bracket of an automobile seat;

[0019] Figure 2 This is a schematic diagram of the lower die structure of a continuous die for stamping a rear bracket of an automobile seat;

[0020] Figure 3 This is a schematic diagram of the upper die structure of a continuous die for stamping a rear bracket of an automobile seat;

[0021] Figure 4 This is a structural diagram of a guide rod of a continuous die for stamping a rear bracket of an automobile seat;

[0022] Figure 5 This is a schematic diagram of the finished car seat rear bracket.

[0023] In the picture:

[0024] 1. Lower die; 11. Die base; 111. Punching hole; 112. Trimming hole; 113. Bending slot; 114. Cutting

[0025] Broken groove; 115, cutting slope; 116, limiting column;

[0026] 117, positioning hole; 12, bottom plate;

[0027] 2. Upper die; 21. Tool holder; 211. Punch; 22. Upper pad; 23. Pre-load plate; 231. Clearance hole; 24. Guide rod; 241. Positioning rod; 25. Compression spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] Example 1

[0030] This embodiment provides a continuous stamping die for a rear bracket of an automobile seat. Figure 1-Figure 5 As shown, the continuous die for stamping the rear bracket of the automobile seat comprises a lower die 1 for mounting on a machine platform and an upper die 2 for mounting on a movable end of a punching machine.

[0031] The lower die 1 includes a progressive die base 11 and a lower pad 12 fixedly mounted at the bottom of the die base 11 for connecting to the machine. The top surface of the die base 11 is provided with punching holes 111, trimming holes 112, bending grooves 113 and truncation grooves 114 in sequence from the feed end to the discharge end.

[0032] The upper die 2 includes a tool holder 21 and an upper pad 22 fixedly mounted on the top of the tool holder 21 for connecting to the movable end of the punching machine. A punch 211 corresponding to the punching hole 111, the trimming hole 112, the bending groove 113 and the truncation groove 114 is fixedly mounted on the bottom surface of the tool holder 21.

[0033] Guide rods 24 are provided at the four corners of the bottom surface of the knife holder 21 , and positioning holes 117 for inserting the guide rods 24 are provided at the four corners of the top surface of the mold holder 11 .

[0034] During use, the sheet is fed into the feed end of the die base 11 by an external conveying device. As the punch press is pressed down, the punch 211 of the upper die first corresponds to the punch hole 111 of the lower die, and the raw material is punched to form the required hole position. Then, as the sheet moves to the next trimming area, that is, the trimming hole 112 position, the raw material is trimmed to remove the excess part to form a preliminary L-shaped sheet outline. At the same time, the newly entered sheet area is punched once synchronously. Then, as the sheet continues to be fed in, the head semi-finished product is sent to the bending area, that is, the bending groove 113 position. As the punch presses, the punch 211 corresponding to the bending area is pressed. 11 bends the corresponding part of the plate into the bending groove 113. Synchronously, the subsequent plate also completes the process of the corresponding area, that is, punching and trimming. After moving to the next level, the finished product part comes to the cutting area. As the punch 211 punches, the punch 211 corresponding to the cutting groove 114 cuts off the finished product part. Synchronously, the subsequent plate also completes the process of the corresponding area, that is, punching, trimming and bending. As the plate continues to be fed in, the cut-off finished product is ejected from the discharge end of the mold. In this way, multiple processes can be carried out simultaneously in one stamping, which greatly shortens the processing time and improves efficiency. At the same time, it reduces human interference and improves the yield rate.

[0035] Furthermore, the discharge end of the die base 11 has a discharge slope 115 for guiding the discharge of the finished product; during the stamping process, as the sheet continues to be fed, the finished product will be pushed out of the die by the subsequent sheet, and then, under the guidance of the discharge slope 115, it will slide along the set path to the collection area, avoiding accumulation at the discharge end, reducing the need for manual material retrieval, and improving the degree of automation of the production line.

[0036] It should be noted that the bending groove 113 extends to the outside of the discharge end of the mold base 11, providing space for the finished product after bending to facilitate discharge.

[0037] It should also be noted that the punching hole 111, the trimming hole 112 and the truncation groove 114 all pass through the die base 11 and the lower plate 12; when the punch 211 is inserted into the corresponding punching hole 111, the trimming hole 112 and the truncation groove 114, if they are closed holes and grooves, a high-pressure reaction force is formed in a limited space, hindering the stamping stroke, and at the same time, the waste dropped by the punching will also accumulate in the hole and groove.

[0038] Furthermore, the positions on both sides of the plate corresponding to the feed end of the mold base 11 are provided with a plurality of limiting columns 116 distributed linearly; their main function is to perform preliminary limiting and guiding on the raw materials when they enter the mold, ensuring that the raw materials can be accurately and stably placed at the feed end of the mold. The design of the limiting columns 116 helps to reduce the deviation and shaking of the raw materials during the feeding process, thereby improving the processing accuracy and yield rate.

[0039] Example 2

[0040] The difference from Example 1 is that during bending, due to the unbalanced force on the plate, if the plate is thicker, the longer the punching stroke of the punch 211 will cause the plate to warp, resulting in greater deviation in bending when the plate is thicker, affecting the quality of the finished product. For this reason, a pre-stressing plate 23 is longitudinally movable below the tool holder 21 and is slidably connected to the guide rod 24. The bottom end of the guide rod 24 has a positioning rod 241 with a diameter larger than the guide rod 24 for preventing the pre-stressing plate 23 from falling off. The outside of the guide rod 24 is provided with a compression spring 25 connected to the tool holder 21 and the pre-stressing plate 23 at both ends, wherein the positioning hole 117 matches the size of the positioning rod 241, and the pre-stressing plate 23 has a clearance hole 231 for the punch 211 to pass through.

[0041] During the stamping process, before the punch 211 starts stamping, the pre-stressing plate 23 moves downward and contacts the sheet material under the action of the compression spring 25, guided by the guide rod 24 and the positioning rod 241. This contact process applies an initial and uniform pressure to the sheet material, so that the sheet material can maintain better stability during the subsequent bending process.

[0042] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A continuous die for stamping a rear bracket of an automobile seat, comprising a lower die (1) for mounting on a machine platform and an upper die (2) for mounting on a movable end of a punching machine, characterized in that: The lower die (1) comprises a progressive die base (11) and a lower pad (12) fixedly mounted on the bottom of the die base (11) for connecting to a machine platform. The top surface of the die base (11) is provided with a punching hole (111), a trimming hole (112), a bending groove (113) and a truncation groove (114) in sequence from the feed end to the discharge end. The upper die (2) comprises a knife seat (21) and an upper pad (22) fixedly mounted on the top of the knife seat (21) for connecting to the movable end of the punching machine, and a punch (211) corresponding to the punching hole (111), the trimming hole (112), the bending groove (113) and the truncation groove (114) is fixedly mounted on the bottom surface of the knife seat (21); The bottom surface of the knife seat (21) is provided with guide rods (24) at positions corresponding to the four corners, and the top surface of the mold seat (11) is provided with positioning holes (117) for inserting the guide rods (24) at the four corners.

2. The continuous stamping die for the rear bracket of an automobile seat according to claim 1, characterized in that: The discharge end of the mold base (11) is provided with a discharge slope (115) for guiding the discharge of finished products.

3. The continuous stamping die for the rear bracket of an automobile seat according to claim 2, characterized in that: The bending groove (113) extends to the outside toward the discharge end of the mold base (11).

4. The continuous stamping die for the rear bracket of an automobile seat according to claim 3, characterized in that: The punching hole (111), the trimming hole (112) and the truncation groove (114) all pass through the die base (11) and the lower pad (12).

5. The stamping continuous die for the rear bracket of an automobile seat according to claim 4, characterized in that: The die base (11) has a plurality of linearly distributed limiting columns (116) at positions on both sides of the plate corresponding to the feeding end.

6. The continuous stamping die for the rear bracket of an automobile seat according to claim 5, characterized in that: A pre-stressing plate (23) is provided below the knife seat (21) and is slidably connected to the guide rod (24). The bottom end of the guide rod (24) has a positioning rod (241) with a diameter larger than that of the guide rod (24) for preventing the pre-stressing plate (23) from falling off. A compression spring (25) is provided on the outside of the guide rod (24), with both ends respectively connected to the knife seat (21) and the pre-stressing plate (23), wherein the positioning hole (117) matches the size of the positioning rod (241).

7. The continuous stamping die for the rear bracket of an automobile seat according to claim 6, characterized in that: The pre-pressing plate (23) is provided with a clearance hole (231) for the punch (211) to pass through.

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