A punching die for punching U-shaped avoidance holes at the ends of square tubes of seats

Abstract

The present invention relates to the technical field of automobile seats, and specifically to a punching die for punching a U-shaped avoidance hole at the end of a square tube of a seat, comprising a lower die support plate supported on a horizontal plane and an upper die support plate installed on an upper slide of a press machine, wherein a lower die seat is provided at the upper end of the lower die support plate, a U-shaped bracket matching the outer wall of the square tube is provided on the end surface of the lower die seat, an auxiliary support assembly for facilitating loading and unloading of the square tube is provided on the side of the lower die seat, and a punching groove penetrating from top to bottom is provided at the bottom of the U-shaped bracket; a lifting seat is provided at the lower end of the upper die support plate, a punching block is provided at the lower end of the lifting seat, the upper die support plate is connected to the lower die support plate by guide columns located at four corners, and an auxiliary pressing block is provided at the lower end of the upper die support plate. The present invention has a simple structure and a low cost, is convenient for stably and efficiently positioning the square tube, and improves the punching efficiency and punching quality when punching the U-shaped avoidance hole at the end of the square tube.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile seats, and in particular to a punching die for punching a U-shaped avoidance hole at the end of a square tube of a seat. Background Art

[0002] The existing punching operation of the U-shaped avoidance hole in the square tube of the automobile seat frame is performed using a punching die. Since the die is heavy, it is not convenient to move the die when docking, and it is not convenient to fix the other tube when positioning it. The punching efficiency and quality are relatively low. Summary of the invention

[0003] The purpose of the present invention is to provide a punching die for punching a U-shaped avoidance hole at the end of a square tube of a seat.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Provided is a punching die for punching a U-shaped avoidance hole at the end of a square tube of a seat, comprising a lower die support plate supported on a horizontal plane and an upper die support plate installed on an upper slide of a press, wherein a lower die seat is provided at the upper end of the lower die support plate, a U-shaped bracket matching the outer wall of the square tube is provided on the end surface of the lower die seat, and an auxiliary support assembly for facilitating loading and unloading of the square tube is provided on the side of the lower die seat, and a punching groove penetrating from top to bottom is provided at the bottom of the U-shaped bracket;

[0006] A lifting seat is provided at the lower end of the upper die support plate, and a punching block is provided at the lower end of the lifting seat. The punching block extends into the U-shaped bracket and is located directly above the punching slot;

[0007] The upper die support plate and the lower die support plate are connected by guide pillars located at four corners, the guide pillars are vertically arranged at the upper end of the lower die support plate, the upper ends of the guide pillars pass through the guide holes arranged on the upper die support plate, and the ends of the guide pillars are provided with limit blocks, the guide pillars are sleeved with a first spring, the upper end of the first spring is connected to the lower end surface of the upper die support plate, and the lower end of the first spring is connected to the upper end of the lower die support plate;

[0008] An auxiliary pressing block is provided at the lower end of the upper mold support plate. The lower end surface of the auxiliary pressing block is provided with a U-shaped pressing groove matching the outer wall of the square tube. The U-shaped pressing groove is located directly above the U-shaped bracket and distributed facing each other. The auxiliary pressing block is installed at the lower end of the upper mold support plate through an elastic telescopic component.

[0009] Preferably, the auxiliary support assembly includes a support plate and a U-shaped seat arranged at the end of the support plate, the support plate is horizontally arranged on the side wall of the lower mold base, the U-shaped seat is installed on the end surface of the support plate, and the U-shaped seat is located on the extension line of the U-shaped bracket.

[0010] Preferably, the elastic telescopic component includes a support column and a second spring, the lower end of the support column is connected to the auxiliary pressure block, and the upper end is movably connected to the upper mold support plate. The second spring is sleeved on the support column, and one end is connected to the upper mold support plate, and the other end is connected to the auxiliary pressure block.

[0011] Preferably, it also includes an elastic reset mechanism, which is vertically arranged between the upper mold support plate and the lower mold support plate, with the upper end of the elastic reset mechanism connected to the upper mold support plate and the lower end connected to the lower mold support plate.

[0012] Preferably, the elastic reset mechanism includes an upper sleeve, a lower sleeve and a reset spring, the upper sleeve is vertically mounted on the lower end of the upper mold support plate, the lower sleeve is vertically mounted on the upper end of the lower mold support plate, and the upper sleeve is located directly above the lower sleeve, one end of the reset spring is connected to the interior of the upper sleeve, and the other end is connected to the interior of the lower sleeve.

[0013] Beneficial effect: When the present invention is in use, the lower die support plate is horizontally arranged on the support surface, the upper die support plate is connected to the upper slide block of the press, and the upper die support plate moves toward the lower die seat through the downward movement of the upper slide block of the press, so that the U-shaped avoidance hole is punched on the end of the square tube through the punching block;

[0014] When punching, one end of the square tube is overlapped in the U-shaped bracket, and the other end is overlapped on the U-shaped seat, and the square tube is pushed in the direction close to the punching block, so that the square tube moves in the direction close to the punching block. Because in the non-punching stage, there is a gap for the square tube to pass through the lower end of the punching block and the bottom of the U-shaped bracket. When the square tube is pushed, until the end of the square tube contacts the inner side of the lifting seat, the punching block will be located in the inner area of ​​the end of the square tube; then the upper slide of the press machine moves downward to drive the upper die support plate to move downward. When the upper die support plate moves downward, the first spring The first spring and the return spring are compressed, the auxiliary pressing block will contact the square tube in advance, and the second spring is gradually compressed. The slider on the press continues to move downward, the first spring, the second spring and the return spring are further compressed, the punching block contacts the inner wall of the square tube and punches the U-shaped avoidance hole on the inner wall of the square tube, and finally falls into the punching groove to complete the punching of the square tube. When one end of the square tube is punched, the slider on the press is reset, the square tube is taken out, and the other end of the square tube is placed in the U-shaped bracket. Repeat the previous operation to complete the punching operation of the other end of the square tube.

[0015] During the whole process, the auxiliary pressure block can perform secondary positioning on the square tube to prevent the unstable positioning of the square tube during punching. In addition, when the slider on the pressure gauge is reset, the auxiliary pressure block can effectively prevent the square tube from moving upward and there will be no instantaneous force loss. The existence of the first spring and the reset spring makes the upper mold support plate more stable during the downward movement and reset process.

[0016] The invention has a simple structure and low cost, is convenient for stably and efficiently positioning the square tube, and improves the punching efficiency and punching quality when punching the U-shaped avoidance hole at the end of the square tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings in the embodiment of the present invention are briefly introduced below.

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the auxiliary pressing block and the lower die seat when punching a square tube;

[0020] Figure 3 It is a schematic diagram of the distribution of the punching block and the U-shaped bracket;

[0021] Figure 4 is a schematic diagram of an auxiliary pressing block;

[0022] Figure 5 It is a schematic diagram of the distribution of punching slots in the U-shaped bracket;

[0023] Figure 6 It is a schematic diagram of the distribution between the lifting seat and its auxiliary pressing block and the upper mold support plate;

[0024] Figure 7 It is a structural schematic diagram of the square tube after punching;

[0025] 1-lower die support plate, 2-lower die seat, 2-1-U-shaped bracket, 2-2-punching slot, 3-support plate, 3-1-U-shaped seat, 4-upper die support plate, 4-1-lifting seat, 5-guide column, 6-limiting block, 7-first spring, 8-auxiliary pressing block, 8-1-U-shaped pressing groove, 9-upper sleeve, 10-lower sleeve, 11-square tube, 11-1-U-shaped avoidance hole, 12-punching block, 13-elastic telescopic component, 131-support column, 132-second spring, 14-reset spring. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0027] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0028] Reference Figures 1 to 7A punching die for punching a U-shaped avoidance hole at the end of a square tube of a seat shown in the figure comprises a lower die support plate 1 supported on a horizontal plane and an upper die support plate 4 installed on an upper slide of a press machine, a lower die base 2 is provided at the upper end of the lower die support plate 1, a U-shaped bracket 2-1 matching the outer wall of a square tube 11 is provided on the end surface of the lower die base 2, and an auxiliary support assembly for facilitating loading and unloading of the square tube 11 is provided on the side of the lower die base 2, and a punching groove 2-2 penetrating from top to bottom is provided at the bottom of the U-shaped bracket 2-1;

[0029] A lifting seat 4-1 is provided at the lower end of the upper die support plate 4, and a punching block 12 is provided at the lower end of the lifting seat 4-1. The punching block 12 extends into the U-shaped bracket 2-1 and is located directly above the punching slot 2-2;

[0030] The upper die support plate 4 is connected to the lower die support plate 1 through guide pillars 5 located at four corners. The guide pillars 5 are vertically arranged at the upper end of the lower die support plate 1. The upper end of the guide pillars 5 passes through the guide holes arranged on the upper die support plate 4. A limit block 6 is arranged at the end of the guide pillars 5. A first spring 7 is sleeved on the guide pillars 5. The upper end of the first spring 7 is connected to the lower end surface of the upper die support plate 4. The lower end of the first spring 7 is connected to the upper end of the lower die support plate 1.

[0031] An auxiliary pressing block 8 is provided at the lower end of the upper mold support plate 4. The lower end surface of the auxiliary pressing block 8 is provided with a U-shaped pressing groove 8-1 matching the outer wall of the square tube 11. The U-shaped pressing groove 8-1 is located directly above the U-shaped bracket 2-1 and distributed oppositely. The auxiliary pressing block 8 is installed at the lower end of the upper mold support plate 4 through an elastic telescopic component 13.

[0032] In this embodiment, the auxiliary support assembly includes a pallet 3 and a U-shaped seat 3-1 arranged at the end of the pallet 3, the pallet 3 is horizontally arranged on the side wall of the lower mold base 2, the U-shaped seat 3-1 is installed on the end surface of the pallet 3, and the U-shaped seat 3-1 is located on the extension line of the U-shaped bracket 2-1.

[0033] In this embodiment, the elastic telescopic component 13 includes a support column 131 and a second spring 132. The lower end of the support column 131 is connected to the auxiliary pressure block 8, and the upper end is movably connected to the upper mold support plate 4. The second spring 132 is sleeved on the support column 131, and one end is connected to the upper mold support plate 4, and the other end is connected to the auxiliary pressure block 8.

[0034] In this embodiment, an elastic reset mechanism is also included. The elastic reset mechanism is vertically arranged between the upper mold support plate 4 and the lower mold support plate 1. The upper end of the elastic reset mechanism is connected to the upper mold support plate 4, and the lower end is connected to the lower mold support plate 1.

[0035] In this embodiment, the elastic reset mechanism includes an upper sleeve 9, a lower sleeve 10 and a reset spring 14. The upper sleeve 9 is vertically installed at the lower end of the upper mold support plate 4, and the lower sleeve 10 is vertically installed at the upper end of the lower mold support plate 1, and the upper sleeve 9 is located directly above the lower sleeve 10. One end of the reset spring 14 is connected to the interior of the upper sleeve 9, and the other end is connected to the interior of the lower sleeve 10.

[0036] When the present invention is in use, the lower die support plate 1 is horizontally arranged on the support surface, and the upper die support plate 4 is connected to the upper slide block of the press, and the upper die support plate 1 moves toward the lower die seat 2 by the downward movement of the upper slide block of the press, so that the U-shaped avoidance hole 11-1 is punched at the end of the square tube 11 by the punching block 12;

[0037] When punching, one end of the square tube 11 is overlapped in the U-shaped bracket 2-1, and the other end is overlapped on the U-shaped seat 3-1, and the square tube 11 is pushed in the direction close to the punching block 12, so that the square tube 11 moves in the direction close to the punching block 12. Because in the non-punching stage, there is a gap for the square tube 11 to pass through the lower end of the punching block 12 and the bottom of the U-shaped bracket 2-1. When the square tube 11 is pushed, until the end of the square tube 11 contacts the inner side of the lifting seat 4-1, the punching block 12 will be located in the inner area of ​​the end of the square tube 11; then the upper slide of the press machine moves downward to drive the upper die support plate 4 to move downward. When the upper die support plate 4 moves downward, the first spring 7 and the return spring 14 are compressed, the auxiliary pressing block 8 will contact the square tube 11 in advance, and the second spring 132 is gradually compressed, the slider on the press continues to move downward, the first spring 7, the second spring 132 and the return spring 14 are further compressed, the punching block 12 contacts the inner wall of the square tube 11 and punches the U-shaped avoidance hole 11-1 on the inner wall of the square tube 11, and finally falls into the punching groove 2-2 to complete the punching of the square tube 11. When one end of the square tube 11 is punched, the slider on the press is reset, the square tube 11 is taken out, and the other end of the square tube 11 is placed in the U-shaped bracket 2-1, and the previous operation is repeated to complete the punching operation of the other end of the square tube.

[0038] During the whole process, the auxiliary pressure block 8 can perform secondary positioning on the square tube 11 to prevent unstable positioning of the square tube 11 during punching. In addition, when the upper slider of the pressure gauge is reset, the auxiliary pressure block 8 can effectively prevent the square tube 11 from moving upward, and there will be no instantaneous force loss. The presence of the first spring 7 and the reset spring 14 makes the upper mold support plate 1 more stable during the downward movement and its reset process.

[0039] The invention has a simple structure and low cost, is convenient for stably and efficiently positioning the square tube, and improves the punching efficiency and punching quality when punching the U-shaped avoidance hole at the end of the square tube.

[0040] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A punching die for punching a U-shaped avoidance hole at the end of a square tube of a seat, comprising a lower die support plate (1) supported on a horizontal plane and an upper die support plate (4) mounted on an upper slide of a press, characterized in that: A lower die base (2) is provided at the upper end of the lower die support plate (1), a U-shaped bracket (2-1) matching the outer wall of the square tube (11) is provided on the end surface of the lower die base (2), and an auxiliary support component for facilitating loading and unloading of the square tube (11) is provided on the side of the lower die base (2), and a punching groove (2-2) penetrating from top to bottom is provided at the bottom of the U-shaped bracket (2-1); A lifting seat (4-1) is provided at the lower end of the upper die support plate (4), and a punching block (12) is provided at the lower end of the lifting seat (4-1). The punching block (12) extends into the U-shaped bracket (2-1) and is located directly above the punching slot (2-2); The upper die support plate (4) and the lower die support plate (1) are connected via guide pillars (5) located at four corners, the guide pillars (5) are vertically arranged at the upper end of the lower die support plate (1), the upper end of the guide pillars (5) penetrates through guide holes arranged on the upper die support plate (4), and a limit block (6) is provided at the end of the guide pillars (5), a first spring (7) is sleeved on the guide pillars (5), the upper end of the first spring (7) is connected to the lower end surface of the upper die support plate (4), and the lower end of the first spring (7) is connected to the upper end of the lower die support plate (1); An auxiliary pressing block (8) is provided at the lower end of the upper die support plate (4); a U-shaped pressing groove (8-1) matching the outer wall of the square tube (11) is provided on the lower end surface of the auxiliary pressing block (8); the U-shaped pressing groove (8-1) is located directly above the U-shaped bracket (2-1) and is distributed in opposite directions; the auxiliary pressing block (8) is installed at the lower end of the upper die support plate (4) via an elastic telescopic component (13); It also includes an elastic reset mechanism, which is vertically arranged between the upper mold support plate (4) and the lower mold support plate (1), the upper end of the elastic reset mechanism is connected to the upper mold support plate (4), and the lower end is connected to the lower mold support plate (1); the elastic reset mechanism includes an upper sleeve (9), a lower sleeve (10) and a reset spring (14), the upper sleeve (9) is vertically installed on the lower end of the upper mold support plate (4), the lower sleeve (10) is vertically installed on the upper end of the lower mold support plate (1), and the upper sleeve (9) is located directly above the lower sleeve (10), and one end of the reset spring (14) is connected to the interior of the upper sleeve (9), and the other end is connected to the interior of the lower sleeve (10); The auxiliary support assembly comprises a support plate (3) and a U-shaped seat (3-1) arranged at the end of the support plate (3), the support plate (3) being arranged horizontally on the side wall of the lower die seat (2), the U-shaped seat (3-1) being mounted on the end surface of the support plate (3), and the U-shaped seat (3-1) being located on the extension line of the U-shaped bracket (2-1).

2. A punching die for punching U-shaped avoidance holes at the ends of square tubes of seats according to claim 1, characterized in that: The elastic telescopic component (13) comprises a support column (131) and a second spring (132); the lower end of the support column (131) is connected to the auxiliary pressure block (8), and the upper end is movably connected to the upper mold support plate (4); the second spring (132) is sleeved on the support column (131), and one end is connected to the upper mold support plate (4), and the other end is connected to the auxiliary pressure block (8).

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