A folding edge die for the long leg tube of a swivel chair

Abstract

The present invention discloses a hemming die for the long leg tube of a swivel chair, belonging to the technical field of dies, which comprises an upper die and a lower die. It is characterized in that: the upper die includes an upper mounting plate, and second pressing plates and third pressing plates are symmetrically arranged at the bottom of the upper mounting plate; the lower die includes a lower mounting plate, and third limiting plates are symmetrically arranged on the upper surface of the lower mounting plate. A support plate is arranged between the third limiting plates. Third sliders are symmetrically arranged on the upper surface of the support plate. Second sliders are arranged on the upper surfaces of the third sliders. Second limiting plates are symmetrically arranged at one end of the support plate. A fifth limiting plate is arranged at the end of the support plate far from the second limiting plate. First sliders are arranged on the side of the second limiting plate close to the support plate. Fourth sliders are arranged on the side of the fifth limiting plate close to the support plate. A die core is arranged in the middle of the fourth slider. Forming grooves are arranged at the corresponding positions of the first sliders and the die core. First pressing plates and fourth pressing plates are arranged at the bottom of the upper mounting plate. The present invention sequentially completes the forming and hemming work of the long leg tube of the swivel chair, the forming process is more precise, and the quality of the finished product is significantly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and specifically to a hemming die for the long leg tubes of a swivel chair. Background Art

[0002] A chair is a common piece of furniture in daily life. With the continuous improvement of technology, more and more types of chairs have emerged. A swivel chair is a very common type among them. In order to keep the structure simple, the swivel chair base usually only includes structures such as a tray, a column, leg tubes, and a runner. Among them, the leg tubes include long leg tubes and short leg tubes. During the production of the long leg tubes, hemming is an important process, which is mainly completed by a hemming die. In the traditional hemming die during the hemming process, the raw material plate of the long leg tube is often simply pressed and preliminarily formed by the closing of the upper die and the lower die. For the irregular edge parts, due to the relatively simple and rough pressing process, the quality of the finished long leg tube is not high, and the subsequent cooperation with the runner and the short leg tubes is also affected to a certain extent. Based on this situation, how to make the forming process of the long leg tube more precise so as to effectively improve the quality of the finished long leg tube has increasingly become an urgent problem for relevant technical personnel to solve. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a hemming die for the long leg tubes of a swivel chair.

[0004] A hemming die for the long leg tubes of a swivel chair, comprising an upper die and a lower die, characterized in that: the upper die includes an upper mounting plate, and second pressing plates and third pressing plates are symmetrically arranged at the bottom of the upper mounting plate; the lower die includes a lower mounting plate, and third limiting plates are symmetrically arranged on the upper surface of the lower mounting plate; a support plate is arranged between the third limiting plates; third sliding blocks are symmetrically arranged on the upper surface of the support plate; second sliding blocks are arranged on the upper surfaces of the third sliding blocks; the second pressing plates are arranged corresponding to the third sliding blocks; the third pressing plates are arranged corresponding to the second sliding blocks; second limiting plates are symmetrically arranged at one end of the support plate; a fifth limiting plate is arranged at the end of the support plate far from the second limiting plate; first sliding blocks are arranged on the side of the second limiting plate close to the support plate; fourth sliding blocks are arranged on the side of the fifth limiting plate close to the support plate; a die core is arranged in the middle of the fourth sliding blocks; forming grooves are arranged at the corresponding positions of the first sliding blocks and the die core; a first pressing plate and a fourth pressing plate are arranged at the bottom of the upper mounting plate; the first pressing plate is arranged corresponding to the first sliding blocks; the fourth pressing plate is arranged corresponding to the fourth sliding blocks; the ends of the second pressing plates and the third sliding blocks, the ends of the third pressing plates and the second sliding blocks, the ends of the first pressing plates and the first sliding blocks, and the ends of the fourth pressing plates and the fourth sliding blocks are all inclined surface structures; the lengths of the first pressing plate, the second pressing plate, the third pressing plate, and the fourth pressing plate are sorted from long to short as the first pressing plate, the fourth pressing plate, the second pressing plate, and the third pressing plate.

[0005] Further, a fifth pressure plate is arranged in the middle of the upper mounting plate.

[0006] Further, fourth limiting plates are symmetrically arranged at both ends of the fourth slider, and a first limiting plate is arranged at the bottom of the upper mounting plate.

[0007] Further, limiting columns are symmetrically arranged on the surface of the support plate, a first limiting groove is penetrated through the surface of the second slider, a second limiting groove is penetrated through the surface of the third slider, and the limiting columns penetrate through the first limiting groove and the second limiting groove.

[0008] Further, a sixth limiting plate is arranged on the upper surface of the third limiting plate, and the second pressure plate and the third pressure plate both penetrate through the sixth limiting plate.

[0009] Further, a slot is arranged on the surface of the lower mounting plate, and the second limiting plate, the third limiting plate, and the fifth limiting plate are all fixedly inserted into the slot.

[0010] Further, a top plate is arranged on the upper surface of the upper mounting plate, and a bottom plate is arranged on the lower surface of the lower mounting plate.

[0011] The beneficial effects of a folding edge die for the long leg tube of a swivel chair according to the present invention are as follows:

[0012] 1. During the mold closing process of the upper die and the lower die, the first pressure plate, the fourth pressure plate, the second pressure plate, and the third pressure plate will sequentially squeeze and push the first slider, the fourth slider, the third slider, and the second slider forward, so as to complete the forming and folding edge work of the long leg tube of the swivel chair in sequence. Compared with the simple and rough pressing process of the traditional folding edge die, the forming process is more precise, and the finished product quality of the long leg tube of the swivel chair produced is significantly improved.

[0013] 2. The cooperation between the limiting columns and the first limiting groove and the second limiting groove, and the design that the second pressure plate and the third pressure plate penetrate through the sixth limiting plate enable the movement of the second slider and the third slider to always remain within the linear stroke defined by the first limiting groove and the second limiting groove. The limiting of the fourth slider by the fourth limiting plate enables the movement of the fourth slider to always remain within the linear stroke defined by the fourth limiting plate. Combining the stroke limitation of the fourth slider by the first limiting plate and the forming groove at the corresponding position of the first slider and the mold core makes the forming process more precise, and the finished product quality of the long leg tube of the swivel chair produced is further improved.

[0014] 3. After the preliminary forming and folding edge work are completed, the fifth pressure plate continues to move downward until it completely fits with the upper surface of the long leg tube, so as to achieve the final shaping, and the accuracy of the forming process and the finished product quality are further guaranteed. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the attached drawings required for the description of the embodiments or the prior art, but this is not a limitation on the protection scope of the present invention.

[0016] Figure 1 It is a schematic diagram of the overall structure of a hemming die for the long leg tube of a swivel chair according to the present invention;

[0017] Figure 2 It is a schematic diagram (1) of the structure of the upper die of a hemming die for the long leg tube of a swivel chair according to the present invention;

[0018] Figure 3 It is a schematic diagram (2) of the structure of the upper die of a hemming die for the long leg tube of a swivel chair according to the present invention;

[0019] Figure 4 It is a schematic diagram (1) of the structure of the lower die of a hemming die for the long leg tube of a swivel chair according to the present invention;

[0020] Figure 5 It is a schematic diagram (2) of the structure of the lower die of a hemming die for the long leg tube of a swivel chair according to the present invention;

[0021] Figure 6 It is a schematic diagram (1) of the structure of the combined part of the upper die and the lower die of a hemming die for the long leg tube of a swivel chair according to the present invention;

[0022] Figure 7 It is a schematic diagram (2) of the structure of the combined part of the upper die and the lower die of a hemming die for the long leg tube of a swivel chair according to the present invention;

[0023] Figure 8 It is a schematic diagram of the long leg tube of a swivel chair produced by a hemming die for the long leg tube of a swivel chair according to the present invention.

[0024] Among them, 1 - upper die, 2 - lower die, 3 - first pressing plate, 4 - second pressing plate, 5 - fifth pressing plate, 6 - third pressing plate, 7 - first limiting plate, 8 - fourth pressing plate, 9 - upper mounting plate, 10 - top plate, 11 - second limiting plate, 12 - third limiting plate, 13 - lower mounting plate, 14 - bottom plate, 15 - fourth limiting plate, 16 - fifth limiting plate, 17 - sixth limiting plate, 18 - first slider, 19 - support plate, 20 - second slider, 21 - third slider, 22 - limiting column, 23 - first limiting groove, 24 - second limiting groove, 25 - slot, 26 - die core, 27 - fourth slider. Detailed implementation manners

[0025] To make the description clearer, in combination with the accompanying drawings of the specification Figures 1 to 8 , a further description is made on a hemming die for the long leg tube of a swivel chair according to the present invention.

[0026] A folding edge die for the long leg tube of a swivel chair, comprising an upper die 1 and a lower die 2, characterized in that: the upper die 1 includes an upper mounting plate 9, and second pressing plates 4 and third pressing plates 6 are symmetrically arranged at the bottom of the upper mounting plate 9; the lower die 2 includes a lower mounting plate 13, and third limiting plates 12 are symmetrically arranged on the upper surface of the lower mounting plate 13. A support plate 19 is arranged between the third limiting plates 12, and third sliding blocks 21 are symmetrically arranged on the upper surface of the support plate 19. A second sliding block 20 is arranged on the upper surface of the third sliding block 21. The second pressing plate 4 is arranged corresponding to the third sliding block 21, and the third pressing plate 6 is arranged corresponding to the second sliding block 20. Second limiting plates 11 are symmetrically arranged at one end of the support plate 19, and a fifth limiting plate 16 is arranged at the end of the support plate 19 far from the second limiting plate 11. A first sliding block 18 is arranged on the side of the second limiting plate 11 close to the support plate 19, and a fourth sliding block 27 is arranged on the side of the fifth limiting plate 16 close to the support plate 19. A die core 26 is arranged in the middle of the fourth sliding block 27. A forming groove is arranged at the corresponding position of the first sliding block 18 and the die core 26. A first pressing plate 3 and a fourth pressing plate 8 are arranged at the bottom of the upper mounting plate 9. The first pressing plate 3 is arranged corresponding to the first sliding block 18, and the fourth pressing plate 8 is arranged corresponding to the fourth sliding block 27. The ends of the second pressing plate 4 and the third sliding block 21, the ends of the third pressing plate 6 and the second sliding block 20, the ends of the first pressing plate 3 and the first sliding block 18, and the ends of the fourth pressing plate 8 and the fourth sliding block 27 are all inclined surface structures. The lengths of the first pressing plate 3, the second pressing plate 4, the third pressing plate 6, and the fourth pressing plate 8 are sorted from long to short as the first pressing plate 3, the fourth pressing plate 8, the second pressing plate 4, and the third pressing plate 6.

[0027] Further, a fifth pressing plate 5 is arranged in the middle of the upper mounting plate 9.

[0028] Further, fourth limiting plates 15 are symmetrically arranged at both ends of the fourth sliding block 27, and a first limiting plate 7 is arranged at the bottom of the upper mounting plate 9.

[0029] Further, limiting columns 22 are symmetrically arranged on the surface of the support plate 19. A first limiting groove 23 is arranged through the surface of the second sliding block 20, and a second limiting groove 24 is arranged through the surface of the third sliding block 21. The limiting columns 22 penetrate through the first limiting groove 23 and the second limiting groove 24.

[0030] Further, a sixth limiting plate 17 is arranged on the upper surface of the third limiting plate 12, and the second pressing plate 4 and the third pressing plate 6 both penetrate through the sixth limiting plate 17.

[0031] Further, a slot 25 is arranged on the surface of the lower mounting plate 13, and the second limiting plate 11, the third limiting plate 12, and the fifth limiting plate 16 are all fixedly inserted into the slot 25.

[0032] Further, a top plate 10 is provided on the upper surface of the upper mounting plate 9, and a bottom plate 14 is provided on the lower surface of the lower mounting plate 13.

[0033] The working principle of a folding edge die for the long leg tube of a swivel chair according to the present invention is as follows: The staff places the long leg tube raw material on the upper surface of the support plate 19. The suspension system suspends the upper die 1 directly above the lower die 2 and slowly moves the upper die 1 downward. During the downward movement of the upper die 1, the following processes occur in sequence: The first pressing plate 3 presses and pushes the first slider 18 to move relatively until the two first sliders 18 are in full contact; the fourth pressing plate 8 presses and pushes the fourth slider 27 forward until the fourth slider 27 is in full contact with the first limiting plate 7; the second pressing plate 4 presses and pushes the third slider 21 to move relatively until the second pressing plate 4 is in full contact with the vertical plane adjacent to the third slider 21; the third pressing plate 6 presses and pushes the second slider 20 to move relatively until the third pressing plate 6 is in full contact with the vertical plane adjacent to the second slider 20; the fifth pressing plate 5 continues to move downward until it is in full contact with the upper surface of the long leg tube. Through the above five processes, the preliminary forming, folding edge and final shaping of the long leg tube are completed in sequence. The staff takes out the finished long leg tube, and a working cycle can be completed.

[0034] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement that can be thought of without creative work should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. A folding edge die for the long leg tube of a swivel chair, comprising an upper die (1) and a lower die (2). Characterized in that: The upper die (1) includes an upper mounting plate (9). Second pressing plates (4) and third pressing plates (6) are symmetrically arranged at the bottom of the upper mounting plate (9). The lower die (2) includes a lower mounting plate (13). Third limiting plates (12) are symmetrically arranged on the upper surface of the lower mounting plate (13). A support plate (19) is arranged between the third limiting plates (12). Third sliding blocks (21) are symmetrically arranged on the upper surface of the support plate (19). A second sliding block (20) is arranged on the upper surface of the third sliding block (21). The second pressing plate (4) is correspondingly arranged with the third sliding block (21). The third pressing plate (6) is correspondingly arranged with the second sliding block (20). Second limiting plates (11) are symmetrically arranged at one end of the support plate (19). A fifth limiting plate (16) is arranged at the end of the support plate (19) far from the second limiting plate (11). First sliding blocks (18) are arranged on the side of the second limiting plate (11) close to the support plate (19). Fourth sliding blocks (27) are arranged on the side of the fifth limiting plate (16) close to the support plate (19). A die core (26) is arranged in the middle of the fourth sliding block (27). Forming grooves are arranged at the corresponding positions of the first sliding block (18) and the die core (26). A first pressing plate (3) and a fourth pressing plate (8) are arranged at the bottom of the upper mounting plate (9). The first pressing plate (3) is correspondingly arranged with the first sliding block (18). The fourth pressing plate (8) is correspondingly arranged with the fourth sliding block (27). The ends of the second pressing plate (4) and the third sliding block (21), the ends of the third pressing plate (6) and the second sliding block (20), the ends of the first pressing plate (3) and the first sliding block (18), and the ends of the fourth pressing plate (8) and the fourth sliding block (27) are all inclined surface structures. The lengths of the first pressing plate (3), the second pressing plate (4), the third pressing plate (6), and the fourth pressing plate (8) are sorted from long to short as the first pressing plate (3), the fourth pressing plate (8), the second pressing plate (4), and the third pressing plate (6).

2. A folding edge die for the long leg tube of a swivel chair according to claim 1, Characterized in that, A fifth pressing plate (5) is arranged in the middle of the upper mounting plate (9).

3. A folding edge die for the long leg tube of a swivel chair according to claim 1, Characterized in that, Fourth limiting plates (15) are symmetrically arranged at both ends of the fourth sliding block (27). A first limiting plate (7) is arranged at the bottom of the upper mounting plate (9).

4. A folding edge die for the long leg tube of a swivel chair according to claim 1, Characterized in that, Limit columns (22) are symmetrically arranged on the surface of the support plate (19). First limiting grooves (23) are penetrated through the surface of the second sliding block (20). Second limiting grooves (24) are penetrated through the surface of the third sliding block (21). The limit columns (22) penetrate through the first limiting grooves (23) and the second limiting grooves (24).

5. A folding edge die for the long leg tube of a swivel chair according to claim 1, Characterized in that, The upper surface of the third limiting plate (12) is provided with a sixth limiting plate (17), and the second pressing plate (4) and the third pressing plate (6) both penetrate through the sixth limiting plate (17).

6. A folding die for the long leg tube of a swivel chair according to claim 1, characterized in that, a slot (25) is arranged on the surface of the lower mounting plate (13), and the second limiting plate (11), the third limiting plate (12), and the fifth limiting plate (16) are all fixedly inserted into the slot (25).

7. A folding die for the long leg tube of a swivel chair according to claim 1, characterized in that, a top plate (10) is arranged on the upper surface of the upper mounting plate (9), and a bottom plate (14) is arranged on the lower surface of the lower mounting plate (13).

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