Die for bending arc-shaped bent guide rail

Abstract

The invention relates to a die for bending an arc-shaped bent guide rail, which comprises an upper die holder and a lower die holder, and further comprises an upper clamping plate, an upper die punch, an upper stripper plate and a lower die plate, the upper clamping plate is fixed on the upper die holder, a limiting hole is formed in the upper clamping plate, the upper die punch penetrates through the limiting hole and is fixed on the upper die holder, and the upper stripper plate is fixed on the lower die holder. The upper stripping plate is movably fixed to the upper clamping plate, arc-shaped protruding blocks matched with the outer side of the bent portion of the guide rail part are arranged at the lower end of the upper die punch and the lower end of the upper clamping plate, the lower die plate is fixed to the lower die base, and an arc-shaped groove matched with the inner side of the bent portion of the guide rail part is formed in the upper end of the lower die plate. The lower die plate is further provided with a containing groove matched with the bent portion of the guide rail part, and the bent portion is movably located in the containing groove. Compared with the prior art, the guide rail part bending device has the advantages of high guide rail part bending precision, convenience in demolding and the like.

Description

Technical Field

[0001] The present invention relates to the field of forming tools, and in particular to a mold for bending an arc-shaped bent guide rail. Background Art

[0002] The massage chair guide rail includes an upper hem and a guide rail groove formed by bending the upper hem inward again. If the inner hem in the guide rail groove is bent with a hemming machine, the structure of other bent parts on the guide rail will be damaged. Moreover, for a guide rail with an arc-shaped structure, if a stamping die is used for stamping, stamping different parts separately will cause deformation of different parts, affecting the quality and accuracy of the product.

[0003] The existing guide rail forming molds are generally for bending straight Z-shaped guide rails. Therefore, there is a need to provide a mold for bending an arc-shaped bent guide rail with high guide rail forming accuracy and convenient part demolding. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defect that the above-mentioned existing technology is not applicable to the inner bending of U-shaped guide rails, and to provide a mold for bending an arc-shaped bent guide rail.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A mold for bending an arc-shaped bent guide rail includes an upper die base and a lower die base. The mold further includes an upper clamping plate, an upper die punch, an upper stripping plate, and a lower template. The upper clamping plate is fixed on the upper die base. A limiting hole is provided on the upper clamping plate. The upper die punch passes through the limiting hole and is fixed on the upper die base. The upper stripping plate is movably fixed on the upper clamping plate. Arc-shaped convex blocks are provided at the lower ends of both the upper die punch and the upper clamping plate and are adapted to the outer side of the bending part of the guide rail part. The lower template is fixed on the lower die base. An arc-shaped groove adapted to the inner side of the bending part of the guide rail part is provided at the upper end of the lower template. A receiving groove adapted to the bending part of the guide rail part is further provided on the lower template. The bending part is movably located in the receiving groove.

[0007] Preferably, a floating member is provided on one side of the lower template away from the receiving groove. The floating member is movably fixed on the lower template. A return spring is provided between the floating member and the lower die base. A blank holding pad adapted to the contour of the arc-shaped bending piece of the guide rail part is provided on the floating member.

[0008] Preferably, the floating member includes a first floating block, a second floating block, and a third floating block. The first floating block and the third floating block are located at both ends of the arc-shaped bending piece, and the second floating block is located between the first floating block and the third floating block.

[0009] Preferably, through holes matching with the floating member are provided on the lower template, a guiding post with a triangular structure is provided on one side of the floating member, and a guiding hole matching with the guiding post is provided on one side of the through hole.

[0010] Preferably, a plurality of reset springs are provided, and the reset springs are evenly distributed between the floating member and the lower die base.

[0011] Preferably, the lower template further includes a limiting plate, the limiting plate is located on the side of the floating member away from the receiving groove, and the limiting plate is fixed on the lower die base.

[0012] Preferably, guiding posts are provided on the upper clamping plate, and the upper stripper plate is movably fixed on the guiding posts.

[0013] Preferably, springs are further provided between the upper stripper plate and the upper clamping plate, the number of the springs is multiple, and each spring is evenly distributed between the upper stripper plate and the upper clamping plate.

[0014] Preferably, auxiliary guiding holes corresponding to the position and shape of the limiting holes are provided on the upper stripper plate, and the upper die punch is located in the auxiliary guiding holes.

[0015] Preferably, a lower cushion block and a lower supporting plate are further provided on the lower die base, one end of the lower cushion block is connected to the lower die base, and the other end is connected to the lower supporting plate.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) In this solution, the guide rail part to be bent is placed on the lower template, the inner side of the bending part is in contact with and arranged in the arc-shaped groove, the bending part is placed inside the receiving groove, and then the upper die base drives the upper stripper plate and the upper die punch to move downward. The arc-shaped convex block at the lower end of the upper stripper plate contacts the outer side of the bending part and presses the guide rail part against the arc-shaped groove to press the guide rail part. The bending part of the guide rail part is bent by the arc-shaped convex block at the lower end of the upper die punch. During the bending process of the guide rail part, the bending part of the guide rail part is located inside the receiving groove and does not contact the lower template. Therefore, the accuracy of the bending part is ensured during the bending of the part. Moreover, when the upper die punch moves downward, the upper stripper plate approaches the upper clamping plate, ensuring reliable part positioning and fixation during the bending process of the guide rail part, and improving the quality of the product and the accuracy of each structure.

[0018] (2) In this solution, a floating member is arranged on the lower template. When the upper die punch presses down to bend the guide rail part, the floating member is pressed to move downward. After the upper die punch is removed, the floating member moves upward through the reset spring and cooperates with the ejector table on one side to lift the arc-shaped bending piece of the guide rail part, so that the bent part of the guide rail part is separated from the lower template, and the bent guide rail part can be taken out. The demoulding of the guide rail part is convenient, and the production efficiency of the guide rail part is improved.

[0019] (3) In this solution, the ejector block adopts a multi-section matching structure, which reduces the manufacturing difficulty of the ejector table where the upper end of the ejector block mates with the arc-shaped bending piece of the guide rail part and reduces the cost. Description of the Drawings

[0020] Figure 1 It is a schematic front view structure diagram of the mold provided by the present invention;

[0021] Figure 2 It is a schematic right view structure diagram of the mold provided by the present invention;

[0022] Figure 3 It is a schematic structure diagram of the upper clamping plate provided by the present invention;

[0023] Figure 4 It is a schematic top view and front view structure diagram of the upper die punch provided by the present invention;

[0024] Figure 5 It is a schematic top view and front view structure diagram of the upper stripper plate provided by the present invention;

[0025] Figure 6 It is a schematic top view structure diagram of the lower template provided by the present invention;

[0026] Figure 7 It is a schematic top view and front view structure diagram of a partial structure of the lower template provided by the present invention;

[0027] Figure 8 It is the front view, top view and right view of the third floating block of the floating part provided by the present invention;

[0028] Figure 9 It is a schematic structure diagram of the guide rail part provided by the present invention;

[0029] In the figure: 1. upper die holder, 2. lower die holder, 3. upper clamping plate, 4. upper die punch, 5. upper stripper plate, 6. lower template, 7. guide rail part, 8. return spring, 9. limit plate, 10. lower backing plate, 11. lower spacer block, 31. limit hole, 51. auxiliary guiding hole, 61. arc-shaped groove, 62. receiving groove, 63. floating part, 64. ejector table, 65. first floating block, 66. second floating block, 67. third floating block, 68. guiding column, 69. guiding hole, 71. outer side of the bending part, 72. inner side of the bending part, 73. bending part, 74. arc-shaped bending piece. Detailed Embodiment

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0034] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0035] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0036] Embodiment 1

[0037] Such as Figure 1 、 Figure 2 and Figure 9As shown in the figure, this embodiment provides a mold for bending an arc-shaped bending guide rail, which includes an upper die base 1 and a lower die base 2. The mold further includes an upper clamping plate 3, an upper die punch 4, an upper stripper plate 5 and a lower template 6. The upper clamping plate 3 is fixed on the upper die base 1. A limiting hole 31 is provided on the upper clamping plate 3. The upper die punch 4 passes through the limiting hole 31 and is fixed on the upper die base 1. The upper stripper plate 5 is movably fixed on the upper clamping plate 3. Arc-shaped bumps that cooperate with the outer side 71 of the bending part of the guide rail part 7 are provided at the lower ends of both the upper die punch 4 and the upper clamping plate 3. The lower template 6 is fixed on the lower die base 2. An arc-shaped groove 61 that cooperates with the inner side 71 of the bending part of the guide rail part 7 is provided at the upper end of the lower template 6. A receiving groove 62 that cooperates with the bending part 73 of the guide rail part 7 is further provided on the lower template 6. The bending part 73 is movably located in the receiving groove 62.

[0038] Working principle: Place the guide rail part 7 to be bent on the lower template 6. The inner side 72 of the bending part contacts and is arranged in the arc-shaped groove 61, and the bending part 73 is placed inside the receiving groove 62. Then, drive the upper stripper plate 5 and the upper die punch 4 to move downward through the upper die base. The arc-shaped bump at the lower end of the upper stripper plate 5 contacts the outer side 71 of the bending part and presses the guide rail part 7 against the arc-shaped groove 61 to press the guide rail part 7, and bend the bending part of the guide rail part 7 through the arc-shaped bump at the lower end of the upper die punch 4.

[0039] In this solution, place the guide rail part 7 to be bent on the lower template 6. The inner side 72 of the bending part contacts and is arranged in the arc-shaped groove 61, and the bending part 73 is placed inside the receiving groove 62. Then, drive the upper stripper plate 5 and the upper die punch 4 to move downward through the upper die base. The arc-shaped bump at the lower end of the upper stripper plate 5 contacts the outer side 71 of the bending part and presses the guide rail part 7 against the arc-shaped groove 61 to press the guide rail part 7, and bend the bending part of the guide rail part 7 through the arc-shaped bump at the lower end of the upper die punch 4. During the bending process of the guide rail part 7, the bending part of the guide rail part is located inside the receiving groove and does not contact the lower template 6, thus ensuring the accuracy of the bending part during part bending. Moreover, when the upper stripper plate 6 moves downward along with the upper die punch 4, it approaches the upper clamping plate 3, ensuring reliable part positioning and fixation during the bending process of the guide rail part, improving the quality of the product and the accuracy of each structure.

[0040] As a preferred embodiment, as Figures 6 to 8 shown, a floating part 63 is provided on one side of the lower template 6 away from the receiving groove 62. The floating part 63 is movably fixed on the lower template 6. A return spring 8 is provided between the floating part 63 and the lower die base 6. A blank holding platform 64 that cooperates with the contour of the arc-shaped bending piece 74 of the guide rail part 7 is provided on the floating part 63.

[0041] A floating part is arranged on the lower template. When the upper die punch presses down the bending guide rail part, the floating part is pressed and moves downward. After the upper die punch is removed, the floating part moves upward through the return spring, and cooperates with the ejector table on one side to lift the arc-shaped bending piece of the guide rail part, so that the bent part of the guide rail part is separated from the lower template, and the bent guide rail part can be taken out. The demolding of the guide rail part is convenient, and the production efficiency of the guide rail part is improved.

[0042] Further, the floating part 63 includes a first floating block 65, a second floating block 66 and a third floating block 67. The first floating block 65 and the third floating block 67 are located at both ends of the arc-shaped bending piece 74, and the second floating block 66 is located between the first floating block 65 and the third floating block 67.

[0043] The ejector block adopts a multi-section matching structure, which reduces the manufacturing difficulty of the ejector table that cooperates with the arc-shaped bending piece of the guide rail part at the upper end of the ejector block and reduces the cost.

[0044] As Figure 6 shown, through holes matching with the floating part 63 are arranged on the lower template 6. A triangular structure guide post 68 is arranged on one side of the floating part 63, and a guide hole 69 matching with the guide post 68 is arranged on one side of the through hole. The number of the return springs 8 is multiple, and the return springs 8 are evenly distributed between the floating part 63 and the lower die base 2. The lower template 6 further includes a limiting plate 9. The limiting plate 9 is located on the side of the floating part 63 away from the receiving groove 62, and the limiting plate 9 is fixed on the lower die base 2.

[0045] As Figures 3 to 5 shown, guide posts are arranged on the upper clamping plate 3, and the upper stripper plate 5 is movably fixed on the guide posts. Springs are further arranged between the upper stripper plate 5 and the upper clamping plate 3. The number of the springs is multiple, and each spring is evenly distributed between the upper stripper plate 5 and the upper clamping plate 3. Auxiliary guide holes 51 corresponding to the position and shape of the limiting holes are arranged on the upper stripper plate 5, and the upper die punch 4 is located in the auxiliary guide holes 51.

[0046] As Figure 1 and Figure 2 shown, a lower cushion block 10 and a lower supporting plate 11 are further arranged on the lower die base 2. One end of the lower cushion block 10 is connected to the lower die base 2, and the other end is connected to the lower supporting plate 11.

[0047] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A mold for bending an arc-shaped bent guide rail, comprising an upper die base (1) and a lower die base (2), characterized in that, The mold further includes an upper clamping plate (3), an upper die punch (4), an upper stripper plate (5) and a lower template (6). The upper clamping plate (3) is fixed on the upper die base (1). A limiting hole (31) is provided on the upper clamping plate (3). The upper die punch (4) passes through the limiting hole (31) and is fixed on the upper die base (1). The upper stripper plate (5) is movably fixed on the upper clamping plate (3). Arc-shaped bumps are provided at the lower ends of both the upper die punch (4) and the upper clamping plate (3) to cooperate with the outer side (71) of the bent portion of the guide rail part (7). The lower template (6) is fixed on the lower die base (2). An arc-shaped groove (61) that cooperates with the inner side (71) of the bent portion of the guide rail part (7) is provided at the upper end of the lower template (6). A receiving groove (62) that cooperates with the bent portion (73) of the guide rail part (7) is further provided on the lower template (6). The bent portion (73) is movably located in the receiving groove (62).

2. The mold for bending an arc-shaped bent guide rail according to claim 1, wherein, A floating member (63) is provided on one side of the lower template (6) away from the receiving groove (62). The floating member (63) is movably fixed on the lower template (6). A return spring (8) is provided between the floating member (63) and the lower die base (6). A blank holding pad (64) that cooperates with the contour of the arc-shaped bent piece (74) of the guide rail part (7) is provided on the floating member (63).

3. A mold for bending an arc-shaped bent guide rail according to claim 2, characterized in that, The floating member (63) includes a first floating block (65), a second floating block (66) and a third floating block (67). The first floating block (65) and the third floating block (67) are located at both ends of the arc-shaped bent piece (74), and the second floating block (66) is located between the first floating block (65) and the third floating block (67).

4. A mold for bending an arc-shaped bending guide rail according to claim 2, characterized in that, A through hole that cooperates with the floating member (63) is provided on the lower template (6). A triangular-structured guide post (68) is provided on one side of the floating member (63). A guide hole (69) that cooperates with the guide post (68) is provided on one side of the through hole.

5. A die for bending an arc-shaped bending guide rail according to claim 2, characterized in that The number of the return springs (8) is multiple, and the return springs (8) are evenly distributed between the floating member (63) and the lower die base (2).

6. A mold for bending an arc-shaped bent guide rail according to claim 2, characterized in that, The lower template (6) further includes a limit plate (9). The limit plate (9) is located on one side of the floating member (63) away from the receiving groove (62), and the limit plate (9) is fixed on the lower die base (2).

7. A mold for bending an arc-shaped bent guide rail according to claim 1, characterized in that Guide posts are provided on the upper clamping plate (3), and the upper stripper plate (5) is movably fixed on the guide posts.

8. A mold for bending an arc-shaped bending guide rail according to claim 7, characterized in that, Springs are further provided between the upper stripper plate (5) and the upper clamping plate (3). The number of the springs is multiple, and each spring is evenly distributed between the upper stripper plate (5) and the upper clamping plate (3).

9. A mold for bending an arc-shaped bent guide rail according to claim 1, characterized in that, Auxiliary guide holes (51) corresponding to the position and shape of the limiting holes are provided on the upper stripper plate (5), and the upper die punch (4) is located in the auxiliary guide holes (51).

10. A mold for bending an arc-shaped bending guide rail according to claim 1, characterized in that, A lower cushion block (10) and a lower support plate (11) are further provided on the lower die base (2). One end of the lower cushion block (10) is connected to the lower die base (2), and the other end is connected to the lower support plate (11).

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