Seat back press and hemming die

Abstract

The utility model relates to a kind of seat back stamping flanging mould, including upper pressing block, lower pressing block and side pressing block, the upper pressing block is provided with arc seat, the arc seat is formed seat back stamping cavity by recessing inward, the upper pressing block surface below arc seat surface is located in the periphery of arc seat, to make the upper pressing block surface form lower step in the periphery of arc seat, the upper pressing block is connected with upper power device, and upper power device drives upper pressing block to lift;The mould is combined organically by the lifting action of side pressing block and upper pressing block, so that after upper and lower pressing block complete seat back preliminary stamping, side pressing block can be synchronized with upper pressing block and move down, directly insert the edge of steel plate into arc flanging groove and complete flanging, without additional pre-bending step, thereby the original process of at least three steps is simplified into two steps, stamping cycle is greatly shortened, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a stamping and rolling die for a seat back. Background Technology

[0002] As a crucial load-bearing and supporting structure of a seat, the forming quality of the seat back directly affects the overall performance and structural stability of the seat. Existing seat back stamping processes typically involve multiple steps, especially in the edge rolling process, where a multi-stage, step-by-step forming structure is often used to ensure that the steel plate edges are rolled flat and firmly.

[0003] In traditional technology, the stamping and hemming die for seat backs typically includes an upper pressure block, a lower pressure block, and multiple side pressure blocks. In practice, the upper and lower pressure blocks first press the steel sheet together to form the basic outline of the seat back. Then, the first side pressure block moves towards the lower pressure block, bending the edge of the steel sheet into an arc shape. The second side pressure block then continues the action, inserting the bent edge of the steel sheet into the hemming groove, where it is rolled into the desired hemmed state by the hemming forming structure. The entire process requires at least three steps, and the coordination between the various mechanisms is complex, affecting die efficiency and structural compactness, resulting in a long production cycle and low processing efficiency.

[0004] Therefore, existing technologies suffer from problems such as numerous process steps, complex mechanisms, and low edge-rolling efficiency, making it difficult to meet the demands of modern industry for efficient and automated forming. Utility Model Content

[0005] The purpose of this invention is to provide a seat back stamping and curling die with fewer steps and higher processing efficiency.

[0006] The purpose of this utility model is achieved as follows:

[0007] A seat back stamping and curling die includes an upper pressing block, a lower pressing block, and a side pressing block. The upper pressing block is provided with an arc-shaped seat, which is recessed inward to form a seat back stamping cavity. The surface of the upper pressing block located on the periphery of the arc-shaped seat is lower than the surface of the arc-shaped seat, so that the surface of the upper pressing block located on the periphery of the arc-shaped seat forms a lower step. The upper pressing block is connected to an upper power device, which drives the upper pressing block to rise and fall.

[0008] The lower pressure block is provided with an arc-shaped protrusion, and the lower pressure block is connected to a lower power device, which drives the lower pressure block to rise and fall.

[0009] The side pressure block has an arc-shaped rolled edge groove. The side pressure block is located next to the upper pressure block. The side pressure block is connected to a side power device, which drives the side pressure block to move left and right.

[0010] The side power unit is connected to the upper power unit, and the side power unit moves up and down following the upper power unit.

[0011] This mold organically combines the lifting and lowering actions of the side pressure block and the upper pressure block, so that after the upper and lower pressure blocks complete the initial stamping of the seat back, the side pressure block can move down synchronously with the upper pressure block, directly inserting the edge of the steel plate into the arc-shaped edge-rolling groove to complete the edge rolling, without the need for additional pre-bending steps. This simplifies the original process of at least three steps to two steps, greatly shortening the stamping cycle and improving production efficiency.

[0012] By eliminating the intermediate independent side-pressure pre-bending action, the mold structure is more compact. The side pressure block and the upper pressure block are lifted and moved under the same device drive, reducing the risk of positioning errors caused by multiple repositioning, thus improving the precision and consistency of edge forming and making the product quality more stable.

[0013] In addition, the simplified operation process reduces operational complexity and the number of potential failure points, as well as energy consumption and maintenance costs, which helps to save production resources and improve the automation level and economic efficiency of the production line.

[0014] The objective of this utility model can also be achieved by the following technical measures:

[0015] Furthermore, the seat back stamping cavity is an arc-shaped cavity with an arc-shaped opening.

[0016] When the upper and lower pressure blocks complete the mold closing, the steel plate receives more uniform stress support, avoiding distortion or cracking caused by local stress concentration. At the same time, the arc-shaped opening design provides a more direct guiding channel for the subsequent side pressure block edge rolling operation, improving the connection accuracy between the stamping and edge rolling processes.

[0017] Furthermore, the side pressure block is provided with a rolled edge head that matches the arc-shaped opening shape of the arc-shaped cavity, and the rolled edge head has the arc-shaped rolled edge groove.

[0018] When the side pressure block is performing the edge rolling action, it is precisely aligned with the arc-shaped cavity of the upper pressure block, so that the edge of the steel plate can smoothly enter the edge rolling groove to complete the bending and rolling, which significantly improves the forming accuracy and consistency of the edge rolling, and reduces burrs or wrinkles caused by inaccurate positioning.

[0019] Furthermore, when the upper and lower pressure blocks come close to each other, the arc-shaped protrusion is inserted into the seat back stamping cavity, and a compression gap is formed between the arc-shaped protrusion and the seat back stamping cavity, and the arc-shaped rolled edge groove of the side pressure block is close to the compression gap.

[0020] During the extrusion process, the edge of the steel plate precisely extends out of the extrusion gap and smoothly enters the arc-shaped edge-rolling groove of the side pressure block for edge-rolling, thereby effectively preventing the steel plate from slipping or getting stuck before edge-rolling. At the same time, with the help of the position guidance of the extrusion gap, the edge of the steel plate is fully supported and positioned, which improves the stability and forming quality of edge-rolling, significantly reduces burrs, warping edges or corner defects caused by inaccurate positioning, and helps to improve the production yield and reduce rework costs.

[0021] Furthermore, a bending cavity is formed between the lower step of the upper pressing block and the surface of the lower pressing block, and the extrusion gap communicates with the bending cavity.

[0022] The steel plate edge can smoothly and evenly extend from the extrusion gap and enter the bending cavity for bending, avoiding defects such as burrs and warping caused by traditional multi-step pre-bending and positioning deviation. This improves the accuracy and consistency of bending and forming, simplifies the process, and significantly reduces the rework rate.

[0023] The beneficial effects of this utility model are as follows:

[0024] This utility model, through the linkage design of upper and lower pressure blocks and side pressure blocks, combines the stamping and edge rolling processes into two steps, which greatly shortens the forming cycle and improves production efficiency.

[0025] In this invention, when the upper and lower pressure blocks are closed, the arc-shaped protrusion forms a precise extrusion gap with the edge of the stamping cavity and connects with the bending cavity formed by the lower step, so that the edge of the steel plate is fully supported during the stress, positioning and guidance process, which significantly improves the bending accuracy and reduces the defect rate caused by positioning error.

[0026] In this invention, the side pressure block curling head matches the shape of the arc-shaped cavity opening, enabling the steel plate edge to directly enter the curling groove or bending cavity while tightly adhering to the edge of the arc-shaped seat, eliminating the need for multiple pre-bending steps. This results in a more compact structure, simpler operation, and reduced mold complexity and maintenance costs.

[0027] This utility model, through its overall design, reduces independent side pressure pre-bending and positioning actions, thereby lowering energy consumption and potential failure points, reducing the need for human intervention, and facilitating the automation upgrade of the production line and improving economic efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a stamping and curling die for a seat back.

[0029] Figure 2 This is a schematic diagram of another angle of the stamping and rolling die for the seat back.

[0030] Figure 3 This is a cross-sectional view of the stamping and hemming die for a seat back.

[0031] Figure 4 This is a schematic diagram of a seat back stamping and curling die (the arc-shaped protrusion on the lower pressing block is inserted into the seat back stamping cavity formed by the arc-shaped seat of the upper pressing block).

[0032] Figure 5 This is a schematic diagram of another angle of the seat back stamping and hemming die (the arc-shaped protrusion on the lower pressing block is inserted into the seat back stamping cavity formed by the arc-shaped seat of the upper pressing block).

[0033] Figure 6 This is a cross-sectional view of the seat back stamping and hemming die (the arc-shaped protrusion on the lower pressing block is inserted into the seat back stamping cavity formed by the arc-shaped seat of the upper pressing block).

[0034] Figure 7 This is a schematic diagram of a stamping and rolling die for a seat back (the side power unit drives the side pressing block to move down and laterally in sync with the upper pressing block).

[0035] Figure 8 This is another angle diagram of the stamping and rolling die for the seat back (the side power device drives the side pressure block to move down and laterally synchronously with the upper pressure block).

[0036] Figure 9 This is a cross-sectional view of the stamping and hemming die for the seat back (the side power unit drives the side pressure block to move down and laterally in sync with the upper pressure block).

[0037] Figure 10 This is a cross-sectional view of a seat back stamping and hemming die (with steel plate, side power unit drives side pressure block to move down and laterally synchronously with upper pressure block).

[0038] Figure 11 This is a schematic diagram of a stamping and rolling die for a seat back (with steel plate).

[0039] Figure 12 This is a schematic diagram (with steel plate) of the lower pressing block of the stamping and rolling die for a seat back.

[0040] Figure 13 This is a schematic diagram of the combination of the upper pressure block and the side pressure block of the stamping and rolling die for a seat back.

[0041] Figure 14 This is a schematic diagram of the combination of the upper pressure block and the side pressure block of the stamping and rolling die for the seat back (the side pressure block moves laterally).

[0042] Figure 15 This is a schematic diagram of the seat back.

[0043] Figure 16 This is a schematic diagram of another angle of the seat back. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0045] Implementation examples, in conjunction with Figures 1 to 16 As shown, a seat back stamping and hemming mold includes an upper pressing block 1, a lower pressing block 2, and a side pressing block 3. The upper pressing block 1 is provided with an arc-shaped seat 4, which is recessed inward to form a seat back stamping cavity 41. The surface of the upper pressing block 1 located around the arc-shaped seat 4 is lower than the surface of the arc-shaped seat 4, so that the surface of the upper pressing block 1 located around the arc-shaped seat 4 forms a lower step 11. The upper pressing block 1 is connected to an upper power device 5, which drives the upper pressing block 1 to rise and fall.

[0046] The lower pressure block 2 is provided with an arc-shaped protrusion 21, and the lower pressure block 2 is connected to a lower power device 6, which drives the lower pressure block 2 to rise and fall.

[0047] The side pressure block 3 has an arc-shaped rolled edge groove 31. The side pressure block 3 is located next to the upper pressure block 1. The side pressure block 3 is connected to a side power device 7. The side power device 7 drives the side pressure block 3 to move left and right.

[0048] The side power unit 7 is connected to the upper power unit 5, and the side power unit 7 moves up and down following the upper power unit 5.

[0049] Furthermore, the seat back stamping cavity 41 is an arc-shaped cavity with an arc-shaped opening.

[0050] Furthermore, the side pressure block 3 is provided with a rolled edge head 32 that matches the arc-shaped opening shape of the arc-shaped cavity, and the rolled edge head 32 has the arc-shaped rolled edge groove 31.

[0051] Furthermore, when the upper pressing block 1 and the lower pressing block 2 come close to each other, the arc-shaped protrusion 21 is inserted into the seat back pressing cavity 41, and a compression gap 8 is formed between the arc-shaped protrusion 21 and the seat back pressing cavity 41, and the arc-shaped rolled edge groove 31 of the side pressing block 3 is close to the compression gap 8.

[0052] Furthermore, a bending cavity 10 is formed between the lower step 11 of the upper pressing block 1 and the surface of the lower pressing block 2, and the extrusion gap 8 communicates with the bending cavity 10.

[0053] Working principle:

[0054] When in use, the steel plate 9 is placed on the arc-shaped protrusion 21. First, the lower power device 6 drives the lower pressure block 2 to rise, and the upper power device 5 drives the upper pressure block 1 to fall, so that the arc-shaped protrusion 21 on the lower pressure block 2 is inserted into the seat back stamping cavity 41 formed by the arc-shaped seat 4 of the upper pressure block 1, and the steel plate 9 is squeezed into the three-dimensional contour of the seat back.

[0055] Next, an extrusion gap 8 is formed between the arc-shaped protrusion 21 and the edge of the stamping cavity, while the lower step 11 and the surface of the lower pressure block 2 form a bending cavity 10.

[0056] Subsequently, the side power device 7 drives the side pressure block 3 to move down and laterally in sync with the upper pressure block 1. The edge rolling head 32 enters the arc-shaped opening of the arc-shaped cavity. A portion of the steel plate 9's edge enters the arc-shaped edge rolling groove 31 through the extrusion gap 8 to complete the edge rolling. Another portion of the steel plate 9's edge enters the bending cavity 10 through the extrusion gap 8, closely adhering to the edge of the arc-shaped seat 4, to complete the bending. Thus, the stamping and edge rolling of the seat back are completed in one step in two actions.

Claims

1. A seat back stamping and curling die, comprising an upper pressing block (1), a lower pressing block (2), and a side pressing block (3), characterized in that: The upper pressure block (1) is provided with an arc-shaped seat (4), the arc-shaped seat (4) is recessed inward to form a seat back stamping cavity (41), the surface of the upper pressure block (1) located on the periphery of the arc-shaped seat (4) is lower than the surface of the arc-shaped seat (4) so ​​that the surface of the upper pressure block (1) located on the periphery of the arc-shaped seat (4) forms a lower step (11), the upper pressure block (1) is connected to an upper power device (5), the upper power device (5) drives the upper pressure block (1) to rise and fall; The lower pressure block (2) is provided with an arc-shaped protrusion (21), and the lower pressure block (2) is connected to a lower power device (6), which drives the lower pressure block (2) to rise and fall; The side pressure block (3) has an arc-shaped rolled edge groove (31). The side pressure block (3) is located next to the upper pressure block (1). The side pressure block (3) is connected to a side power device (7). The side power device (7) drives the side pressure block (3) to move left and right. The side power device (7) is connected to the upper power device (5), and the side power device (7) moves up and down following the upper power device (5).

2. The seat back stamping and curling die according to claim 1, characterized in that: The seat back stamping cavity (41) is an arc-shaped cavity with an arc-shaped opening.

3. The seat back stamping and curling die according to claim 2, characterized in that: The side pressure block (3) is provided with a rolled edge head (32) that matches the arc-shaped opening shape of the arc-shaped cavity, and the rolled edge head (32) has the arc-shaped rolled edge groove (31).

4. The seat back stamping and curling die according to claim 3, characterized in that: When the upper pressure block (1) and the lower pressure block (2) come close to each other, the arc-shaped protrusion (21) is inserted into the seat back stamping cavity (41), and a compression gap (8) is formed between the arc-shaped protrusion (21) and the seat back stamping cavity (41). The arc-shaped rolled edge groove (31) of the side pressure block (3) is close to the compression gap (8).

5. The seat back stamping and curling die according to claim 4, characterized in that: The lower step (11) of the upper pressure block (1) and the surface of the lower pressure block (2) form a bending cavity (10), and the extrusion gap (8) connects to the bending cavity (10).

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