Guiding stable type stamping die

Abstract

The invention relates to the technical field of pipeline bending, in particular to a stable guiding type stamping die which comprises a workbench, a pushing mechanism is arranged on the workbench, a die table is arranged at the pushing end of the pushing mechanism, two symmetrically-arranged displacement mechanisms are arranged on the workbench, and bending mechanisms are rotationally arranged at the displacement ends of the displacement mechanisms. An upper mold groove and side mold grooves are formed in the mold table, the side mold grooves are symmetrically formed in the two sides of the mold table, and the side mold grooves are in an arc shape; the bending mechanism comprises a bending arm rotationally arranged at the displacement end of the displacement mechanism and a supporting end arranged at the end of the bending arm. The two ends of the pipe fitting are bent at the same time through the bending arms, the production efficiency can be greatly improved, in the bending process, the bending arms and the supporting ends at the ends of the bending arms can effectively support stressed parts, and deformation and damage of the pipe fitting in the bending process are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pipe bending, in particular to a guiding stable stamping die. Background Art

[0002] When bending pipe fittings, the equipment usually used is a bending machine, or a stamping die is used to stamp the pipe to achieve the bending operation of the pipe.

[0003] For stamping dies, since the interior of the pipe is hollow, in order to avoid damaging the pipe during the bending process and to avoid the pipe from breaking and deforming, it is generally necessary to control its stamping speed and release the buffer pressure process to ensure the forming effect of the pipe. Therefore, the stamping die cannot perform efficient bending operations.

[0004] For the bending machine, its single bending speed is significantly greater than the bending speed of the stamping die. The reason is that during the bending process, supporting components can be inserted into the pipe to provide auxiliary support and avoid pipe deformation caused by the increase in bending speed. However, this bending method with an internal support structure can only bend one end of the pipe at a time, so the bending efficiency of the bending machine is limited.

[0005] In addition, although some processes use stamping dies for bending, sand can be injected into the inside of the pipe to increase the stamping speed while avoiding deformation and damage to the pipe fittings, the sand injection operation will affect the bending efficiency, and the particles will also affect the working environment. If they adhere to the mold, they will also affect the appearance quality of the product.

[0006] When the above two bending devices are used to process pipe parts that need to be bent at both ends, their processing efficiency is difficult to improve due to the limitations caused by the above factors. Therefore, a guided stable stamping die is proposed. Summary of the Invention

[0007] In view of the problem in the above or existing technologies that it is difficult to improve the processing efficiency when processing pipe parts that need to be bent at both ends, the present invention is proposed.

[0008] Therefore, an object of the present invention is to provide a guide-stable stamping die.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: a guided stable stamping die, comprising a workbench, a pushing mechanism is provided on the workbench, a mold table is provided at the pushing end of the pushing mechanism, two symmetrically arranged displacement mechanisms are provided on the workbench, and a bending mechanism is rotatably provided at the displacement end of the displacement mechanism; an upper mold groove and a side mold groove are provided on the mold table, and the side mold grooves are symmetrically arranged on both sides of the mold table, and the side mold grooves are arc-shaped; the bending mechanism comprises a bending arm rotatably provided at the displacement end of the displacement mechanism, and a supporting end provided at the end of the bending arm; the bending arm is inserted into the two ends of the object to be bent, and the mold table is pushed to displace and contact the middle part of the object to be bent by the pushing mechanism to complete the bending operation.

[0010] As a preferred solution of the guided stable stamping die of the present invention, a steel cable is provided at the end of the support end, and a plurality of support balls are evenly provided on the steel cable.

[0011] As a preferred solution of the guided stable stamping die of the present invention, the diameters of the plurality of expansion balls gradually decrease from the end away from the support end to the end close to the support end.

[0012] As a preferred solution of the guided stable stamping die of the present invention, the steel cable is provided with a plurality of evenly distributed supporting balls, and the supporting balls and the spreading balls are distributed in an intermittent manner.

[0013] As a preferred solution of the guided stable stamping die of the present invention, the bending arm includes a swing seat rotatably arranged at the displacement end of the displacement mechanism, and a stud arranged on the swing seat, the outer wall of the stud is threadedly connected with a screw sleeve, and also includes a bending rod arranged at the end of the stud; the support end is arranged at the end of the bending rod.

[0014] As a preferred solution of the guided stable stamping die of the present invention, it further comprises a positioning mechanism provided on the die table; the positioning mechanism comprises a telescopic part provided on the die table, and a fixed part provided at the telescopic end of the telescopic part, an upper die being provided on the fixed part; and a lower die groove being provided on the upper die.

[0015] As a preferred solution of the guided stable stamping die of the present invention, it further comprises: a stripping block rotatably arranged on the die table; a rotating arm is provided on the stripping block, and the rotating axis of the rotating arm coincides with the arc center of the side die groove; and a accommodating groove is provided on the stripping block.

[0016] As a preferred solution of the guided stable stamping die of the present invention, wherein: a blocking block is provided on the die table; and a tension spring is connected between the rotating arm and the blocking block.

[0017] As a preferred solution of the guided stable stamping die of the present invention, it also includes a blocking frame rotatably arranged on the die table, and the blocking frame is used to limit the deflection angle of the stripping block; the blocking frame is provided with a locking bolt, and the locking bolt is threadedly connected to the die table.

[0018] As a preferred solution of the guided stable stamping die of the present invention, the pushing mechanism includes a fixed frame arranged on the workbench, and a hydraulic cylinder arranged on the fixed frame, and a pushing frame is provided at the telescopic end of the hydraulic cylinder.

[0019] The beneficial effects of the guided stable stamping die of the present invention: the present invention can greatly improve the production efficiency by bending the two ends of the pipe at the same time through the bending arm, and during the bending process, the bending arm and the support end of the end thereof can form an effective support for the stressed part, avoiding deformation and damage of the pipe during the bending process. In addition, after the bending of the pipe is completed, the bending arm automatically detaches from the pipe, which can facilitate the unloading operation of the bent pipe, further improving the efficiency and convenience of production. The efficiency is effectively improved compared with traditional stamping dies. In addition, for a bending machine with a support component, the efficiency of the present invention is at least twice that of a bending machine, and it overcomes the problem in the prior art that a bending machine with support capacity cannot bend both ends of a pipe at the same time, and solves the blanking problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 Schematic diagram of the overall structure of the guided stable stamping die.

[0022] Figure 2 Schematic diagram of the structure of the pushing mechanism of the guided stable stamping die.

[0023] Figure 3 It is a structural diagram of the upper die and die table of the guided stable stamping die in the fitted state.

[0024] Figure 4 Schematic diagram of the structure of the guided stable stamping die with the upper die and die table separated.

[0025] Figure 5 Schematic diagram of the structure of the die table, upper die groove and side die groove of the guided stable stamping die.

[0026] Figure 6 Schematic diagram of the structure of the bending arm of the guided stable stamping die.

[0027] Figure 7 Schematic diagram of the bending process of a guided stable stamping die.

[0028] In the figure: 1. Workbench; 11. Outer guide sleeve; 12. Inner guide sleeve; 2. Pushing mechanism; 21. Fixing frame; 22. Hydraulic cylinder; 23. Pushing frame; 231. Inner guide rod; 3. Die table; 31. Upper die groove; 32. Side die groove; 33. Stop block; 34. Fixing seat; 341. Long guide rod; 342. Short guide rod; 4. Displacement mechanism; 5. Bending mechanism; 51. Bending arm; 511. Swing Moving seat; 512, stud; 513, screw sleeve; 514, bending rod; 52, supporting end; 53, steel cable; 54, opening ball; 55, supporting ball; 6, positioning mechanism; 61, telescopic part; 62, fixing part; 63, upper mold; 631, lower mold groove; 632, limiting sleeve; 7, stripping block; 71, rotating arm; 72, accommodating groove; 73, tension spring; 8, blocking frame; 81, locking bolt. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0032] Example 1, with reference to Figures 1 to 7, which is the first embodiment of the present invention, provides a guided stable stamping die, including a workbench 1, a pushing mechanism 2 is provided on the workbench 1, a mold table 3 is provided at the pushing end of the pushing mechanism 2, two symmetrically arranged displacement mechanisms 4 are provided on the workbench 1, and a bending mechanism 5 is rotatably provided at the displacement end of the displacement mechanism 4; the pushing mechanism 2 can push the mold table 3 to move on the workbench 1, the displacement mechanism 4 is fixed on the workbench 1, and the two symmetrically arranged displacement mechanisms 4 can synchronously control the two bending mechanisms 5 to move, for example, the two bending mechanisms 5 are simultaneously controlled by the displacement mechanism 4 to move closer to or away from each other.

[0033] The mold table 3 is provided with an upper mold groove 31 and a side mold groove 32 . The side mold grooves 32 are symmetrically arranged on both sides of the mold table 3 and are arc-shaped. The upper mold groove 31 and the side mold grooves 32 are connected to each other.

[0034] The bending mechanism 5 includes a bending arm 51 rotatably disposed at the displacement end of the displacement mechanism 4 , and a support end 52 disposed at the end of the bending arm 51 ; the support end 52 is a hemispherical structure, and its volume is greater than half of the entire sphere.

[0035] The bending arms 51 are inserted into both ends of the object to be bent, and the pushing mechanism 2 pushes the die table 3 to move and contact the middle of the object to be bent, thereby completing the bending operation.

[0036] During use, the pipe to be processed is placed in the upper die groove 31, and the outer wall diameter of the pipe matches the inner diameter of the upper die groove 31. The position of the mold table 3 can be controlled by the pushing mechanism 2 so that the upper die groove 31 and the bending arm 51 can be on the same straight line. The two bending arms 51 are moved away from each other by the displacement mechanism 4, and the distance between the two support ends 52 can be increased to facilitate the placement of the pipe in the upper die groove 31 of the mold table 3. After the pipe is placed in, the displacement of the two bending arms 51 is controlled by the displacement mechanism 4 to insert the support end 52 into the pipe.

[0037] It should be noted that the displacement mechanism 4 can be a screw-slider mechanism, and the pushing mechanism 2 can be a hydraulic telescopic structure or a pneumatic telescopic structure.

[0038] Among them, reference Figure 7 After the support end 52 is inserted into the pipe, the support end 52 should be located on the right side of the arc center of the side die groove 32, and it should be ensured that during the process of the mold table 3 pushing the pipe, the support end 52 is always located on the right side of the tangent point formed by the bending arm 51 and the side die groove 32. For the specific bending process, please refer to Figure 7As shown, after the support end 52 is inserted into the pipe fitting, the pushing mechanism 2 pushes the mold table 3 to rise. During the rising process, since both sides of the pipe fitting are inserted by the bending arms 51, the mold table 3 lifts the middle part of the pipe fitting, so there is no need to fix the pipe fitting with a clamp, and the stability of the pipe fitting during the lifting process can also be guaranteed. Due to the lifting of the mold table 3, the bending arm 51 is in a straight line state, the bending arm 51 will deflect, the support end 52 will contact the inner wall of the pipe fitting, and the connection between the side mold groove 32 and the upper mold groove 31 will contact the inner wall of the pipe fitting, applying a force to the pipe fitting so that the pipe fitting moves along with the mold table 3 The bending is formed by the rise of the mold table 3. The arc structure of the side mold groove 32 is used to guide the forming of the bending part of the pipe. Since the bending arm 51 is inserted into the end of the pipe during the rising process of the mold table 3, the part where the pipe and the bending arm 51 are connected will always remain tangent to the arc of the side mold groove 32, and the support end 52 can provide a certain support capacity for the bending part to avoid breakage during the bending process. As the mold table 3 rises, the bending arm 51 will gradually be pulled out of the pipe until it is detached. When the bending arm 51 is detached from the pipe, the operation of simultaneously bending both ends of the pipe is completed.

[0039] In summary, by bending both ends of the pipe at the same time through the bending arm 51, the production efficiency can be greatly improved, and during the bending process, the bending arm 51 and the support end 52 at its end can form an effective support for the stressed part, avoiding deformation and damage of the pipe during the bending process. In addition, after the pipe is bent, the bending arm 51 automatically detaches from the pipe, which can facilitate the unloading operation of the bent pipe, further improving the efficiency and convenience of production. The efficiency is effectively improved compared with traditional stamping dies. In addition, for a bending machine with a support component, the efficiency of the present invention is at least twice that of the conventional bending machine, and overcomes the problem in the prior art that a bending machine with support capabilities cannot bend both ends of the pipe at the same time, and solves the unloading problem.

[0040] Preferably, a steel cable 53 is provided at the end of the support end 52, and a plurality of support balls 54 are evenly provided on the steel cable 53. Furthermore, the diameters of the plurality of support balls 54 gradually decrease from the end away from the support end 52 to the end close to the support end 52.

[0041] Preferably, a plurality of evenly distributed supporting balls 55 are provided on the steel cable 53, and the supporting balls 55 and the spreading balls 54 are distributed at intervals.

[0042] When in use, the diameter of the support ball 55 is significantly smaller than the opening ball 54. The setting of the support ball 55 can prevent the pipe from being excessively deformed due to excessive force when the bending speed is too fast. The support of the support ball 55 can prevent damage and breakage. The setting of the support ball 55 can gradually correct the shape of the inner wall of the bent pipe. For details, please refer to Figure 7In the working process shown, at the beginning of bending, the supporting balls 55 and the expanding balls 54 connected by the steel cables 53 can avoid excessive deformation at the bending stress points. After the tube is bent, its cross section will be deformed to a certain extent and tend to be elliptical. During the rising process of the mold table 3, the expanding balls 54 are gradually withdrawn from the bending part of the tube. The cross section of the tube can be corrected by the expanding balls 54. Moreover, due to the expanding force exerted by the expanding balls 54 on the inner wall of the tube, the stress generated during bending can be eliminated during the shaping process of the tube, thereby improving the shaping effect after bending. The setting of the diameter of the expanding balls 54 can allow the tube to be gradually shaped as the bending arm 51 is withdrawn. When the mold table 3 moves to make the bending arm 51 detached from the tube, the displacement of the displacement mechanism 4 and the rise of the mold table 3 can assist in withdrawing the expanding balls 54 from the tube.

[0043] In addition, by adjusting the insertion depth of the bending arm 51 before the pipe is bent through the displacement mechanism 4, the time when the bending arm 51 and the pipe are separated can be changed, thereby controlling the bending angle.

[0044] Example 2, reference Figures 1 to 7 , which is the second embodiment of the present invention. Different from the previous embodiment, the bending arm 51 includes a swing seat 511 rotatably arranged at the displacement end of the displacement mechanism 4, and a stud 512 arranged on the swing seat 511, the outer wall of the stud 512 is threadedly connected with a screw sleeve 513, and also includes a bending rod 514 arranged at the end of the stud 512; the diameter of the bending rod 514 is slightly smaller than the diameter of the bent pipe, which can reduce the degree of deformation of the pipe during the bending process, and the position of the screw sleeve 513 outside the stud 512 can be adjusted by rotating the screw sleeve 513.

[0045] It should be noted that the support end 52 is provided at the end of the bending rod 514 .

[0046] By synchronously adjusting the position of the screw sleeve 513 in the bending arms 51 on both sides, the maximum depth to which the bending arm 51 can be inserted into the pipe can be adjusted, which can be suitable for pipes of different lengths. In addition, by controlling the insertion depth of the bending arm 51, the bending angle can also be controlled. This is because after the insertion depth of the bending arm 51 changes, the separation time between the bending arm 51 and the pipe during the bending process will change, thereby being able to control the bending angle.

[0047] During use, due to the setting of the screw sleeve 513, when loading the pipe before bending, the two bending arms 51 can be moved away from each other by the displacement mechanism 4, and then the pipe is first sleeved on the outside of the bending arm 51 on one side, and then the other end of the pipe is also sleeved on the outside of the bending arm 51 on the other side by sliding the pipe. Figure 7To illustrate, after the bending arms 51 on both sides move away from each other, the pipe fitting is first put on the bending arm 51 on the left side, so that the screw sleeve 513 on the left side conflicts with the end of the pipe fitting. At this time, the right side of the pipe fitting is aligned with the end of the bending arm 51 on the right side, and the pipe fitting is slid so that the pipe fitting is partially put on the bending arm 51 on the right side, and the pipe fitting loses the conflict with the screw sleeve 513 on the left side. The pipe fitting is simultaneously put on the bending arms 51 on both sides. At this time, the displacement mechanism 4 is controlled to move so that the two bending arms 51 are close to each other until the screw sleeves 513 on the bending arms 51 on both sides conflict with the two ends of the pipe fitting, completing the loading of the pipe fitting. The setting of the screw sleeve 513 can automatically realize the centering operation of the pipe fitting to ensure the accuracy of the bending position.

[0048] Compared with what is described in Example 1, the insertion depth of the bending arm 51 before bending the pipe is adjusted by the displacement mechanism 4 to control the bending angle. In this embodiment, it is proposed that the bending angle is controlled by controlling the position of the screw sleeve 513 and changing the maximum insertion depth of the bending arm 51. This can ensure the accuracy of the bending position while controlling the bending angle, and the screw sleeve 513 can effectively position the pipe.

[0049] Specifically, it also includes a positioning mechanism 6 arranged on the mold table 3; the positioning mechanism 6 includes a telescopic part 61 arranged on the mold table 3, and a fixed part 62 arranged at the telescopic end of the telescopic part 61, and an upper mold 63 is provided on the fixed part 62; a lower mold groove 631 is opened on the upper mold 63.

[0050] In this embodiment, the telescopic part 61 can be a cylinder or an electric telescopic rod. The telescopic part 61 controls the fit between the upper mold 63 and the mold table 3, and cooperates with the lower mold groove 631 to position the middle part of the pipe fitting, further improving the positioning effect of the pipe fitting during the bending process, and avoiding inaccurate bending position caused by force deviation at both ends of the pipe fitting when bending.

[0051] Furthermore, it also includes a stripping block 7 that is rotatably arranged on the mold table 3; a rotating arm 71 is provided on the stripping block 7, and the rotation axis of the rotating arm 71 coincides with the arc center of the side mold groove 32; a receiving groove 72 is provided on the stripping block 7, and the shape of the receiving groove 72 matches the outer wall of the pipe fitting.

[0052] A stop block 33 is provided on the mold table 3; a tension spring 73 is connected between the rotating arm 71 and the stop block 33, refer to Figure 4 The blocking block 33 can limit the maximum deflection angle of the rotating arm 71 , and the tension provided by the tension spring 73 can make the rotating arm 71 have a movement tendency to fit the blocking block 33 .

[0053] It should be noted that, referring to Figure 7During the bending process of the pipe, the bending of the pipe and the tilting of the bending arm 51 will exert a force on the stripping block 7, causing the stripping block 7 to rotate accordingly. After the bending operation of the pipe is completed, the bending mechanism 5 is completely pulled out from the end of the pipe through the displacement mechanism 4. Under the tension of the tension spring 73, the stripping block 7 can push the pipe upward. Therefore, when the telescopic member 61 is extended, the upper mold 63 and the mold table 3 are separated, and the bent pipe can be lifted, which is convenient for taking out the bent product.

[0054] It also includes a blocking frame 8 that is rotatably arranged on the mold table 3, and the blocking frame 8 is used to limit the deflection angle of the stripping block 7; a locking bolt 81 is provided on the blocking frame 8, and the locking bolt 81 is threadedly connected to the mold table 3. By rotating the locking bolt 81, the locking force applied to the blocking frame 8 can be adjusted. When in use, the locking bolt 81 can be loosened first, and then the blocking frame 8 is rotated to adjust the position of the blocking frame 8.

[0055] The rest of the structure is the same as that of Example 1.

[0056] When using, refer to Figure 7 By adjusting the position of the blocking frame 8 to limit the maximum deflection angle of the stripping block 7, during the bending process of the pipe, after the bending arm 51 is detached from the end of the pipe, since the steel cable 53 and the opening ball 54 and the supporting ball 55 connected above are still in the pipe, when the opening ball 54 and the supporting ball 55 need to be detached from the pipe, it is also necessary to control the mold table 3 to rise and control the displacement mechanism 4 to move at the same time, so that the bending arms 51 on both sides are away from each other, and then the opening ball 54 and the supporting ball 55 are pulled out. In this process, if the movement of the mold table 3 and the movement of the displacement mechanism 4 can be well achieved, If the synchronization is achieved, the shape of the pipe will not be affected. After the blocking frame 8 limits the maximum deflection angle of the stripping block 7, in the process of controlling the mold table 3 to rise and the displacement mechanism 4 to move, the stripping block 7 cooperates with the accommodating groove 72 to also play a supporting and limiting role for the end of the pipe, so as to avoid the expansion ball 54 from excessively pulling on the end of the pipe when the expansion ball 54 is disengaged, and the pulling force is not parallel to the bent end of the pipe, causing excessive bending of the pipe. Therefore, the difficulty of controlling the displacement mechanism 4 to move accordingly while the mold table 3 rises can be effectively reduced.

[0057] Example 3, reference Figures 1 to 7 , which is the third embodiment of the present invention. Different from the previous embodiment, the pushing mechanism 2 includes a fixed frame 21 arranged on the workbench 1, and a hydraulic cylinder 22 arranged on the fixed frame 21, and a pushing frame 23 is provided at the telescopic end of the hydraulic cylinder 22.

[0058] Specifically, the fixing frame 21 is fixed on the workbench 1 , and the extension and retraction of the hydraulic cylinder 22 can enable the pushing frame 23 to slide.

[0059] Furthermore, an inner guide rod 231 is provided through the pushing frame 23, and an inner guide sleeve 12 is fixed on the workbench 1. The inner guide sleeve 12 and the inner guide rod 231 are slidably connected. The cooperation between the inner guide sleeve 12 and the inner guide rod 231 can increase the stability of the mold table 3 and provide good guiding ability.

[0060] Among them, an outer guide sleeve 11 is fixed on the workbench 1, a fixed seat 34 is fixed on the mold table 3, a long guide rod 341 and a short guide rod 342 are fixed at both ends of the fixed seat 34, the long guide rod 341 and the outer guide sleeve 11 are slidably connected, and a limit sleeve 632 is fixed on the upper mold 63, and the limit sleeve 632 and the short guide rod 342 are slidably connected.

[0061] The arrangement of the limiting sleeve 632 and the short guide rod 342 can increase the stability between the mold table 3 and the upper mold 63 and improve the guiding capability.

[0062] The long guide rod 341 and the outer guide sleeve 11 can increase the stability of the mold table 3 during movement and improve the guiding ability of the mold table 3.

[0063] The rest of the structure is the same as that of Example 2.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A guide stable stamping die, characterized in that: The workbench (1) comprises a pushing mechanism (2) provided on the workbench (1), a pushing end of the pushing mechanism (2) being provided with a mold table (3), two symmetrically arranged displacement mechanisms (4) being provided on the workbench (1), and a bending mechanism (5) being provided at the displacement end of the displacement mechanism (4); The mold table (3) is provided with an upper mold groove (31) and a side mold groove (32), the side mold grooves (32) are symmetrically arranged on both sides of the mold table (3), and the side mold grooves (32) are arc-shaped; The bending mechanism (5) comprises a bending arm (51) rotatably arranged at the displacement end of the displacement mechanism (4), and a support end (52) arranged at the end of the bending arm (51); The bending arms (51) are inserted into both ends of the object to be bent, and the mold table (3) is pushed by the pushing mechanism (2) to move and contact the middle of the object to be bent, thereby completing the bending operation.

2. The guide-stable stamping die according to claim 1, wherein: A steel cable (53) is provided at the end of the support end (52), and a plurality of support balls (54) are evenly provided on the steel cable (53).

3. The guide-stable stamping die according to claim 2, wherein: The diameters of the plurality of opening balls (54) gradually decrease from an end away from the support end (52) to an end close to the support end (52).

4. The guide-stable stamping die according to claim 3, wherein: A plurality of evenly distributed supporting balls (55) are provided on the steel cable (53), and the supporting balls (55) and the opening balls (54) are distributed in an interval manner.

5. The guide-stable stamping die according to any one of claims 1 to 4, characterized in that: The bending arm (51) includes a swing seat (511) rotatably arranged at the displacement end of the displacement mechanism (4), and a stud (512) arranged on the swing seat (511), the outer wall of the stud (512) being threadedly connected to a screw sleeve (513), and also includes a bending rod (514) arranged at the end of the stud (512); The supporting end (52) is provided at the end of the bending rod (514).

6. The guide-stable stamping die according to claim 5, characterized in that: It also includes a positioning mechanism (6) provided on the mold table (3); The positioning mechanism (6) comprises a telescopic member (61) provided on the mold table (3), and a fixed portion (62) provided at the telescopic end of the telescopic member (61), wherein an upper mold (63) is provided on the fixed portion (62); The upper mold (63) is provided with a lower mold groove (631).

7. The guide-stable stamping die according to claim 6, wherein: It also includes a stripping block (7) that is rotated and arranged on the mold table (3); The stripping block (7) is provided with a rotating arm (71), and the rotating axis of the rotating arm (71) coincides with the arc center of the side mold groove (32); The stripping block (7) is provided with a receiving groove (72).

8. The guide-stable stamping die according to claim 7, wherein: A blocking block (33) is provided on the mold table (3); A tension spring (73) is connected between the rotating arm (71) and the blocking block (33).

9. The guide-stable stamping die according to claim 8, wherein: It also includes a blocking frame (8) rotatably arranged on the mold table (3), wherein the blocking frame (8) is used to limit the deflection angle of the stripping block (7); The blocking frame (8) is provided with a locking bolt (81), and the locking bolt (81) is threadedly connected to the mold table (3).

10. The guide-stable stamping die according to claim 9, wherein: The pushing mechanism (2) comprises a fixed frame (21) provided on the workbench (1), and a hydraulic oil cylinder (22) provided on the fixed frame (21), wherein a pushing frame (23) is provided at the telescopic end of the hydraulic oil cylinder (22).

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