A bending pipe punching die

Abstract

The present invention discloses a bent pipe punching die, which includes an upper template, a lower template, a fixing mechanism, a first punching mechanism and a second punching mechanism. The fixing mechanism is used for fixing the bent pipe; the first punching mechanism includes at least one side punching device and a first upper punching device; the second punching mechanism includes a second upper punch, one end of the second upper punch is fixedly connected to the upper template, and the other end of the second upper punch is used to penetrate the top wall of the bent pipe. The beneficial effects of the technical solution proposed by the present invention are as follows: the bent pipe is fixed by the fixing mechanism, and the bent pipe is punched by the first punching mechanism to form a first upper punch hole and a side punch hole respectively. At the same time, the bent pipe is punched by the second punching mechanism to form a second upper punch hole. Thus, the stamping of the first upper punch hole, the second upper punch hole and the side punch hole is completed through one punching process, reducing the error of each punched hole position, improving the qualification rate of the punched bent pipe products, and reducing the production cost of the bent pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping dies, and more particularly to a pipe bending and punching die. Background Art

[0002] Figure 1 The structure of a bent pipe 1 used as a trunk bracket of an automobile is shown. Four side punching holes 11 and two first upper punching holes 12 are provided at one end of the bent pipe 1, and four second upper punching holes 13 are provided at the other end of the bent pipe 1. The four side punching holes 11, the two first upper punching holes 12 and the four second upper punching holes 13 are all in pairs.

[0003] When manufacturing the bent pipe, the prior art is to punch a straight pipe into the shape of a bent pipe and then perform two punching operations. The first punching operation processes the two first upper punching holes 12 and the four second upper punching holes 13, and the second punching operation processes the four side punching holes 11. Since there will be a certain displacement deviation in the punched hole positions during each punching, the cumulative error of the hole positions in the two punching operations is relatively large, resulting in a low qualified rate of the processed bent pipe products and increasing the production cost. Summary of the Invention

[0004] In view of this, it is necessary to provide a pipe bending and punching die that reduces the error of the punched hole positions, improves the qualified rate of the punched bent pipe products, and reduces the production cost.

[0005] A pipe bending and punching die is used to punch side punching holes, first upper punching holes and second upper punching holes on a bent pipe. The pipe bending and punching die includes: an upper template, a lower template, a fixing mechanism, a first punching mechanism and a second punching mechanism.

[0006] The fixing mechanism is arranged between the upper template and the lower template and is used to fix the bent pipe.

[0007] The first punching mechanism includes at least one side punching device and a first upper punching device. The side punching device includes a plurality of side punches and at least one side punching wedge device. The side punches are used to penetrate the side wall of the bent pipe. The side punching wedge device is connected to both the upper template and each of the side punches. The first upper punching device includes a first upper punch. One end of the first upper punch is fixedly connected to the upper template, and the other end of the first upper punch is used to penetrate the top wall of the bent pipe.

[0008] The second punching mechanism includes a second upper punch. One end of the second upper punch is fixedly connected to the upper template, and the other end of the second upper punch is used to penetrate the top wall of the bent pipe.

[0009] Compared with the prior art, the beneficial effects of the technical solution proposed by the present invention are as follows: The bent pipe is fixed by a fixing mechanism, and the bent pipe is punched by a first punching mechanism to form a first upper punching hole and a side punching hole respectively. At the same time, the bent pipe is punched by a second punching machine to form a second upper punching hole. Thus, the stamping of the first upper punching hole, the second upper punching hole and the side punching hole is completed through one punching process, reducing the error of each punched hole position, improving the qualified rate of the punched bent pipe product, and reducing the production cost of the bent pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a three-dimensional structure schematic diagram of a bent pipe used as an automobile trunk support;

[0011] Figure 2 is a three-dimensional structure schematic diagram of an embodiment of a bent pipe punching die provided by the present invention;

[0012] Figure 3 is Figure 2 a three-dimensional structure schematic diagram of the bent pipe punching die in after removing the upper template;

[0013] Figure 4 is Figure 3 a three-dimensional structure schematic diagram of the bent pipe punching die in after removing the pressure block, the compression spring and the side upper wedge;

[0014] Figure 5 is Figure 4 a three-dimensional structure schematic diagram of the bent pipe punching die in after removing the groove plate and the mounting block;

[0015] Figure 6 is Figure 5 a top view of the bent pipe punching die in after removing the first upper punch and adding a mounting block and a side upper wedge;

[0016] Figure 7 is Figure 5 a three-dimensional structure schematic diagram of the movable cutting edge insert block in ;

[0017] In the figure: 1 - elbow pipe, 2 - upper template, 3 - lower template, 4 - fixing mechanism, 5 - first punching mechanism, 6 - second punching mechanism, 11 - side punching hole, 12 - first upper punching hole, 13 - second upper punching hole, 21 - guide post, 22 - upper limit block, 31 - guide sleeve, 32 - lower limit block, 41 - first fixing block, 42 - second fixing block, 43 - clamping inclined wedge device, 44 - pressing block, 45 - pressing spring, 46 - mounting block, 47 - fixed cutting edge insert block, 48 - movable cutting edge insert block, 481 - first upper die hole, 482 - side die hole, 49 - driving device, 491 - backing plate, 492 - cylinder, 493 - groove plate, 51 - side punching device, 511 - side punch, 512 - side punching inclined wedge device, 5121 - lower side punching inclined wedge, 5122 - upper side punching inclined wedge, 52 - first upper punching device, 521 - first upper punch, 61 - second upper punch. Detailed implementation mode

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Please refer to Figures 2 - 6 , the present invention provides an elbow pipe punching die, including an upper template 2, a lower template 3, a fixing mechanism 4, a first punching mechanism 5 and a second punching mechanism 6.

[0020] Please refer to Figure 4 , the fixing mechanism 4 is arranged between the upper template 2 and the lower template 3 and is used for fixing the elbow pipe 1.

[0021] Please refer to Figures 4 - 7 , the first punching mechanism 5 includes at least one side punching device 51 and a first upper punching device 52. The side punching device 51 includes a plurality of side punches 511 and at least one side punching inclined wedge device 512. The side punches 511 are used to penetrate the side wall of the elbow pipe 1 to form side punching holes 11. The side punching inclined wedge device 512 is connected to both the upper template 2 and each of the side punches 511. The first upper punching device 52 includes a first upper punch 521. One end of the first upper punch 521 is fixedly connected to the upper template 2, and the other end of the first upper punch 521 is used to penetrate the top wall of the elbow pipe 1 to form a first upper punching hole 12.

[0022] Please refer to Figure 4 , the second punching mechanism 6 includes a second upper punch 61. One end of the second upper punch 61 is fixedly connected to the upper template 2, and the other end of the second upper punch 61 is used to penetrate the top wall of the elbow pipe 1 to form a second upper punching hole 13.

[0023] When the elbow pipe punching die provided by the present invention is in use, first, the elbow pipe 1 is fixed on the lower template 3 through the fixing mechanism 4. Then, the punching press operates to make the upper template 2 move downward. On the one hand, the downward movement of the upper template 2 drives the first upper punch 521 and the second upper punch 61 to penetrate downward through the top wall of the elbow pipe 1, thereby forming the first upper punching hole 12 and the second upper punching hole 13 respectively. On the other hand, the downward movement of the upper template 2 drives the side punching wedge device 512 to act. The side punching wedge device 512 makes each side punch 511 laterally penetrate the side wall of the elbow pipe 1, thereby forming the side punching holes 11. Then, the punching press rises, driving the upper template 2 to move upward. Then, the elbow pipe product is taken out to complete the entire punching process.

[0024] Specifically, please refer to Figure 4 , the side punching wedge device 512 includes a mutually cooperating side punching lower wedge 5121 and a side punching upper wedge 5122. The side punching lower wedge 5121 is slidably installed on the lower template 3. One end of each side punch 511 is fixedly connected to the side punching lower wedge 5121. The side punching upper wedge 5122 is fixed on the upper template 2. In use, the downward movement of the upper template 2 drives the side punching upper wedge 5122 to move downward. The side punching upper wedge 5122 acts on the side punching lower wedge 5121 through an inclined surface, causing the side punching lower wedge 5121 to translate, thereby driving each side punch 511 to insert into the side wall of the elbow pipe 1.

[0025] Preferably, please refer to Figures 3 - 6 , the number of the side punching devices 51 is two. The two side punching devices 51 are respectively arranged on both sides of the elbow pipe 1. Thus, when performing side punching, the lateral impact forces of the two side punching devices 51 on the elbow pipe 1 can cancel each other out, thereby ensuring that the elbow pipe 1 will not move laterally due to the impact of the side punching device 51.

[0026] The fixing mechanism 4 includes four embodiments:

[0027] Please refer to Figure 4 and Figure 5, in the first embodiment, the fixing mechanism 4 includes a first fixing block 41, a second fixing block 42 and a clamping wedge device 43. The first fixing block 41 is fixed on the lower template 3. The first fixing block 41 has a first arc edge, and the first arc edge is used to fit with the inner arc surface of the bent pipe 1. The second fixing block 42 is slidably installed on the lower template 3. The second fixing block 42 can be located at a first position and a second position. The second fixing block 42 has a second arc edge. When the second fixing block 42 is located at the first position, the second arc edge fits with the outer arc surface of the bent pipe 1. When the second fixing block 42 is located at the second position, the second arc edge is separated from the outer arc surface of the bent pipe 1. The clamping wedge device 43 includes a clamping lower wedge and a clamping upper wedge. The clamping lower wedge is fixedly installed on the lower template 3. The clamping upper wedge is slidably installed on the upper template 2 and is fixedly connected to the second fixing block 42. The inclined surface of the clamping upper wedge fits with the inclined surface of the clamping lower wedge. During use, when the upper template 2 is pressed down, the second fixing block 42 is located at the first position, so that the inner arc surface and the outer arc surface of the bent pipe 1 are respectively abutted against the first fixing block 41 and the second fixing block 42, so as to achieve the purpose of fixing the bent pipe 1. When the upper template 2 rises, the second fixing block 42 is located at the second position, so that the second arc edge is separated from the outer arc surface of the bent pipe 1 to facilitate the removal of the bent pipe 1.

[0028] Please refer to Figure 3 , on the basis of the first embodiment, the fixing mechanism 4 in the second embodiment further includes a pressing block 44 and a plurality of pressing springs 45. The pressing block 44 is arranged in parallel with the upper template 2. One end of each pressing spring 45 is fixedly connected to the upper template 2, and the other end of each pressing spring 45 is fixedly connected to the upper end surface of the pressing block 44. During use, when the upper template 2 is pressed down, the upper template 2 applies pressure to the pressing block 44 through each pressing spring 45, and the pressing block 44 applies pressure to the bent pipe 1, so that the bent pipe 1 remains fixed during punching.

[0029] Please refer to Figure 4 and Figure 5, on the basis of the second embodiment, the fixing mechanism 4 in the third embodiment further includes a mounting block 46 and a fixed cutting edge insert block 47. The mounting block 46 is fixed on the lower template 3. One end of the fixed cutting edge insert block 47 is fixedly connected to the mounting block 46, and the other end of the fixed cutting edge insert block 47 is used to insert one end of the bent pipe 1. The outer side wall of the fixed cutting edge insert block 47 is fitted with the inner side wall of the bent pipe 1. A second upper die hole corresponding to the second upper punching hole 13 is formed in the fixed cutting edge insert block 47. During use, one end of the bent pipe 1 is sleeved on the fixed cutting edge insert block 47, so as to facilitate the fixing of the bent pipe 1. At the same time, since the second upper die hole is formed in the fixed cutting edge insert block 47, the bent pipe 1 can be punched by cooperating with the second upper punch 61, preventing the bent pipe 1 from deforming during the punching process.

[0030] Please refer to Figures 4 - 7 , on the basis of the third embodiment, the fixing mechanism 4 in the fourth embodiment further includes a movable cutting edge insert block 48 and a driving device 49. The movable cutting edge insert block 48 is used to insert the other end of the bent pipe 1. A first upper die hole 481 corresponding to the first upper punching hole 12 is formed in the movable cutting edge insert block 48, and a side die hole 482 corresponding to the side punching hole 11 is also formed in the movable cutting edge insert block 48; the driving device 49 is connected to the movable cutting edge insert block 48. During use, first, one end of the bent pipe 1 is sleeved on the fixed cutting edge insert block 47, and then the movable cutting edge insert block 48 is inserted into the other end of the bent pipe 1 through the driving device 49, so as to fix the bent pipe 1. At the same time, since the first upper die hole 481 and the side die hole 482 are formed in the movable cutting edge insert block 48, the bent pipe 1 can be punched by cooperating with the first upper punch 521 and the side punch 511, preventing the bent pipe 1 from deforming during the punching process.

[0031] Preferably, please refer to Figures 4 - 7 , the driving device 49 includes a backing plate 491 and a cylinder 492. The backing plate 491 is fixed on the lower template 3; the cylinder 492 is installed on the backing plate 491, and the output shaft of the cylinder 492 is connected to the movable cutting edge insert block 48 and is used to drive the movable cutting edge insert block 48 to move.

[0032] Preferably, please refer to Figures 4 - 7 , the driving device 49 further includes a groove plate 493. The groove plate 493 is fixed on the backing plate 491. A guide groove extending along the length direction of the groove plate 493 is formed in the groove plate 493. The output shaft of the cylinder 492 passes through the guide groove and is slidably connected to the groove plate 493. The output shaft of the cylinder 492 is limited by the guide groove, thereby preventing it from laterally deviating.

[0033] Preferably, please refer to Figure 2, a number of guide posts 21 are fixed on the upper template 2, and bushings 31 corresponding to each of the guide posts 21 are fixed at positions on the lower template 3 corresponding to the guide posts 21. Through the cooperation of the guide posts 21 and the bushings 31, the downward pressing process of the upper template 2 is accurately positioned.

[0034] Preferably, please refer to Figure 2 , a number of upper limit blocks 22 are also fixed on the upper template 2, and lower limit blocks 32 corresponding to each of the upper limit blocks 22 are fixed at positions on the lower template 3 corresponding to the upper limit blocks 22. Through the cooperation of the upper limit blocks 22 and the lower limit blocks 32, the downward pressing depth of the upper template 2 is restricted.

[0035] To better understand the present invention, the working process of the elbow punching die provided by the present invention is described in detail below in conjunction with Figures 1 - 7 : When in use, first, one end of the elbow 1 is sleeved on the fixed cutting edge insert block 47, and then the air cylinder 492 is started to insert the movable cutting edge insert block 48 into the other end of the elbow 1, so as to fix the elbow 1. Then, the punching press operates to make the upper template 2 move downward. The downward movement of the upper template 2 drives the clamping upper wedge to slide, so that the second fixed block 42 reaches the first position, and the inner arc surface and the outer arc surface of the elbow 1 are respectively clamped by the first fixed block 41 and the second fixed block 42, enhancing the stability of the elbow 1. At the same time, the upper template 2 applies pressure to the pressing block 44 through each pressing spring 45, and the pressing block 44 applies pressure to the elbow 1, so as to further enhance the stability of the elbow 1 during punching. When the upper template 2 presses downward, the first upper punch 521 and the second upper punch 61 penetrate downward through the top wall of the elbow 1, so as to form the first upper punching hole 12 and the second upper punching hole 13 respectively. When the upper template 2 presses downward, it will simultaneously drive the side punching wedge device 512 to act. The side punching wedge device 512 makes each side punch 511 penetrate laterally through the side wall of the elbow 1, so as to form the side punching hole 11. Then, the punching press rises, driving the upper template 2 to move upward. Then, the air cylinder 492 is started to separate the movable cutting edge insert block 48 from the elbow 1. Finally, the elbow product is taken out to complete the entire punching process.

[0036] In summary, the present invention fixes the elbow 1 through the fixing mechanism 4, punches the elbow 1 through the first punching mechanism 5 to form the first upper punching hole 12 and the side punching hole 11 respectively, and at the same time punches the elbow 1 through the second punching mechanism 6 to form the second upper punching hole 13. Thus, the stamping of the first upper punching hole 12, the second upper punching hole 13 and the side punching hole 11 is completed through one punching process, reducing the error of each punched hole position, improving the qualified rate of the punched elbow product, and reducing the production cost of the elbow 1.

[0037] The specific embodiments of the present invention described above do not limit the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A bent pipe punching die, which is used to punch side punching holes, first upper punching holes and second upper punching holes on a bent pipe, and is characterized in that, The elbow punching die includes: an upper template, a lower template, a fixing mechanism, a first punching mechanism and a second punching mechanism. The fixing mechanism is arranged between the upper template and the lower template and is used for fixing the elbow. The first punching mechanism includes at least one side punching device and a first upper punching device. The side punching device includes a plurality of side punches and at least one side punching inclined wedge device. The side punches are used to penetrate the side wall of the elbow. The side punching inclined wedge device is connected to both the upper template and each of the side punches. The first upper punching device includes a first upper punch. One end of the first upper punch is fixedly connected to the upper template, and the other end of the first upper punch is used to penetrate the top wall of the elbow. The second punching mechanism includes a second upper punch. One end of the second upper punch is fixedly connected to the upper template, and the other end of the second upper punch is used to penetrate the top wall of the elbow. Wherein, the side punching inclined wedge device includes a mutually cooperating side punching lower inclined wedge and a side punching upper inclined wedge. The side punching lower inclined wedge is slidably installed on the lower template. The side punching lower inclined wedge is fixedly connected to one end of each of the side punches. The side punching upper inclined wedge is fixed on the upper template. Wherein, the fixing mechanism includes a first fixing block, a second fixing block and a clamping inclined wedge device. The first fixing block is fixed on the lower template. The first fixing block has a first arc-shaped edge, and the first arc-shaped edge is used to fit with the inner arc surface of the elbow. The second fixing block is slidably installed on the lower template. The second fixing block can be located at a first position and a second position. The second fixing block has a second arc-shaped edge. When the second fixing block is located at the first position, the second arc-shaped edge fits with the outer arc surface of the elbow. When the second fixing block is located at the second position, the second arc-shaped edge is separated from the outer arc surface of the elbow. The clamping inclined wedge device includes a clamping lower inclined wedge and a clamping upper inclined wedge. The clamping lower inclined wedge is fixedly installed on the lower template. The clamping upper inclined wedge is slidably installed on the upper template and is fixedly connected to the second fixing block. The inclined surface of the clamping upper inclined wedge fits with the inclined surface of the clamping lower inclined wedge. Wherein, when the upper template presses down, the second fixing block is located at the first position, so that the inner arc surface and the outer arc surface of the elbow are respectively abutted against the first fixing block and the second fixing block, so as to achieve the purpose of fixing the elbow. When the upper template rises, the second fixing block is located at the second position, so that the second arc-shaped edge is separated from the outer arc surface of the elbow to facilitate the removal of the elbow. Wherein, the fixing mechanism includes a mounting block and a fixed cutting edge insert block. The mounting block is fixed on the lower template. One end of the fixed cutting edge insert block is fixedly connected to the mounting block. The other end of the fixed cutting edge insert block is used to insert into one end of the elbow. The outer side wall of the fixed cutting edge insert block fits with the inner side wall of the elbow. A second upper die hole corresponding to the second upper punching is provided on the fixed cutting edge insert block. Wherein, the fixing mechanism further includes a movable cutting edge insert block and a driving device. The movable cutting edge insertion block is used to insert the other end of the bent pipe. A first upper die hole corresponding to the first upper punching hole is formed on the movable cutting edge insertion block, and a side die hole corresponding to the side punching hole is also formed on the movable cutting edge insertion block; The driving device is connected to the movable cutting edge insertion block.

2. The bent pipe punching die according to claim 1, characterized in that, The number of the side punching devices is two, and the two side punching devices are respectively arranged on both sides of the bent pipe.

3. The bent pipe punching die according to claim 1, characterized in that, The fixing mechanism includes a pressing block and a plurality of pressing springs. The pressing block is arranged parallel to the upper template. One end of each pressing spring is fixedly connected to the upper template, and the other end of each pressing spring is fixedly connected to the upper end surface of the pressing block.

4. The bent pipe punching die according to claim 1, characterized in that, The driving device includes a backing plate and a cylinder, The backing plate is fixed on the lower template; The cylinder is installed on the backing plate, and the output shaft of the cylinder is connected to the movable cutting edge insertion block and is used to drive the movable cutting edge insertion block to move.

5. The bent pipe punching die according to claim 4, characterized in that, The driving device further includes a groove plate. The groove plate is fixed on the backing plate. A guide groove extending along the length direction of the groove plate is formed in the groove plate. The output shaft of the cylinder passes through the guide groove and is slidably connected to the groove plate.

6. The bent pipe punching die according to claim 1, characterized in that, A plurality of guide posts are fixed on the upper template, and guide sleeves corresponding to the guide posts one by one are fixed at positions corresponding to the guide posts on the lower template.

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