Double-clamping-die pipe end machining equipment with self-locking mechanism

Abstract

The invention provides double-clamping-die pipe end machining equipment with a self-locking mechanism, the double-clamping-die pipe end machining equipment comprises a workbench, a double-clamping-die positioning mechanism arranged on the workbench and a pipe end machining mechanism arranged on the workbench and matched with the double-clamping-die positioning mechanism, the double-clamping-die positioning mechanism comprises a first main clamping die and a second main clamping die, and the first main clamping die and the second main clamping die are oppositely arranged; a first auxiliary clamping die is movably arranged on the side of the first main clamping die, a second auxiliary clamping die is movably arranged on the side of the second main clamping die, the first auxiliary clamping die and the second auxiliary clamping die are oppositely arranged, sliding guide blocks are arranged on the side of the first auxiliary clamping die and the side of the second auxiliary clamping die, and push blocks are movably arranged on the side of the sliding guide blocks. The push block is in wedge fit with the sliding guide block through an inclined surface, so that when the push block moves, the sliding guide block is propped against or far away from the first auxiliary clamping die and the second auxiliary clamping die; the machining stability of the short pipe fitting is improved, and the situation that clamping die parts occupy too much space is avoided.

Description

Technical Field

[0001] The invention relates to the field of pipe processing equipment, in particular to double-clamping die pipe end processing equipment with a self-locking mechanism. Background Art

[0002] Currently, when processing the pipe ends of pipe fittings such as stainless steel pipes and aluminum pipes, it is usually necessary to use a clamping die to clamp and fix the pipe fittings. However, due to the differences in pipe fitting models, sizes, and wall thicknesses, the clamping die that is suitable for the pipe fittings is also different.

[0003] When double-grooving most existing pipe fittings, the clamping force of a single clamp is limited due to the limited clamping area of ​​the clamp. This can cause the clamp to open during the pipe end forming process, affecting product quality. In addition, the addition of a secondary clamp to the hydraulic system will cause the hydraulic system's bulky structure to affect the processing position. At the same time, the hydraulic oil also has a certain degree of compressibility, making it difficult to ensure the stable clamping of the clamp.

[0004] Directly increasing the clamping area of ​​the clamp will result in it being unsuitable for processing shorter pipes. Therefore, the two existing clamping die improvement methods are both difficult to adapt to processing shorter pipes. Summary of the Invention

[0005] The object of the present invention is to provide a double-clamp pipe end processing device with a self-locking mechanism, which improves the stability during processing of shorter pipes and avoids the clamping die components from occupying too much space.

[0006] In order to solve the above technical problems, the present invention provides a double-clamp tube end processing equipment with a self-locking mechanism, including a workbench, a double-clamp positioning mechanism arranged on the workbench, and a tube end processing mechanism arranged on the workbench and matching the double-clamp positioning mechanism. The double-clamp positioning mechanism includes a first main clamp and a second main clamp arranged relatively to each other, the first main clamp is provided with a first sub-clamp for movement on the side, the second main clamp is provided with a second sub-clamp for movement on the side, the first sub-clamp and the second sub-clamp are arranged relatively to each other, and the first sub-clamp and the second sub-clamp are both provided with sliding guide blocks on the sides, the sliding guide blocks are provided with push blocks for movement on the sides, the push blocks and the sliding guide blocks are wedge-matched through inclined surfaces, so that when the push blocks move, the sliding guide blocks press against or move away from the first sub-clamp and the second sub-clamp.

[0007] Furthermore, the push block is provided with a guide groove, and the side of the sliding guide block is provided with a guide strip that is movably matched with the guide groove, and the guide groove is arranged parallel to the inclined surface.

[0008] Furthermore, at least two first pressure plates are fixedly provided on the side of the first main clamp, and at least two first pressure plates are respectively placed on both sides of the first auxiliary clamp; at least two second pressure plates are fixedly provided on the side of the second main clamp, and at least two second pressure plates are respectively placed on both sides of the second auxiliary clamp.

[0009] Furthermore, grooves are provided on the sides of the first pressing plate and the second pressing plate, and the side of the sliding guide block has a flange that is movably matched with the groove, so that when the sliding guide block moves, the flange moves along the groove.

[0010] Furthermore, guide rods are telescopically arranged between the sliding guide block and the first pressure plate, and between the sliding guide block and the second pressure plate, elastic parts are sleeved on the outer periphery of the guide rods, and a limiting groove is provided at the sliding guide block, and a first limiting pin matching the limiting groove is provided on the side of the first main clamping mold, and a second limiting pin matching the limiting groove is provided on the side of the second main clamping mold.

[0011] Furthermore, the tube end processing mechanism includes a base plate arranged on the workbench and a shifting plate movably arranged on the base plate, and a plurality of die seats are movably arranged on the shifting plate so that the die seat drives the punch close to or away from the tube end; and a top block is movably arranged on the side of the base plate, and the top block is provided with a positioning groove, and a plurality of die seats are provided with positioning blocks matching the positioning groove at one end close to the top block, so that after the shifting plate drives the plurality of die seats to move to the specified position, the positioning block of one of the die seats is clamped in the positioning groove.

[0012] Furthermore, an anti-skid plate is provided on the upper side of the bottom plate, and anti-skid grooves matching the anti-skid plate are provided on the side of several die seats close to the anti-skid plate, and avoidance grooves are provided on the side of the anti-skid plate, and the avoidance grooves correspond to the top blocks.

[0013] Furthermore, a positioning component is provided on the side of the base plate, and the positioning component includes a mounting plate movably provided on the side of the base plate, the moving direction of the mounting plate is consistent with the moving direction of the die seat, and the side of the mounting plate has a positioning rod matching the pipe end.

[0014] Furthermore, a positioning track is provided at the mounting plate, the positioning rod is movably matched with the positioning track, and the positioning rod moves obliquely.

[0015] Furthermore, a robotic arm is provided on the workbench, the robotic arm is movably provided at the crossbeam, and the end of the robotic arm has a clamping claw for clamping the workpiece, so that the robotic arm can drive the workpiece to move and shift between adjacent double-clamp positioning mechanisms.

[0016] The beneficial effects of the present invention are as follows: when processing the ends of shorter pipe fittings, the pipe fittings are first clamped and positioned by the first main clamp and the second main clamp, and then the push block cooperates with the inclined surface to push the sliding guide block with an oblique wedge, so that the movement of the push block can synchronously control the sliding guide block to tighten the first sub-clamp and the second sub-clamp, thereby allowing the first sub-clamp and the second sub-clamp to perform secondary clamping on the pipe fitting. While improving the stability of pipe processing, since there is no need to add components such as oil cylinders, the addition of sub-clamps will not occupy too much space, thereby ensuring that shorter pipe fittings can still be stably processed under the positioning of the double clamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the positions of the double clamping die positioning mechanism and the tube end processing mechanism in the present invention.

[0019] Figure 3 It is a structural schematic diagram of the double-clamp mold positioning mechanism in the present invention.

[0020] Figure 4 This invention Figure 3 A partial enlarged view of point A in the middle.

[0021] Figure 5 It is a front view of the double clamping mold positioning mechanism in the present invention.

[0022] Figure 6 It is a structural schematic diagram of the pipe end processing mechanism in the present invention.

[0023] Figure 7 This invention Figure 6 A partial enlarged view of point B in the middle.

[0024] Figure 8 It is a side view of the pipe end processing mechanism of the present invention.

[0025] Figure 9 It is a structural schematic diagram of the positioning component in the present invention.

[0026] Figure 10 It is a schematic diagram of the double-groove pipe fitting processed by the present invention.

[0027] Figure markings: 1. workbench; 2. first main clamp; 3. second main clamp; 4. first auxiliary clamp; 5. second auxiliary clamp; 6. sliding guide block; 7. push block; 8. inclined surface; 9. guide groove; 10. guide bar; 11. first pressure plate; 12. second pressure plate; 13. groove; 14. flange; 15. guide rod; 16. elastic member; 17. limiting groove; 18. first limiting pin; 19. second limiting pin; 20. bottom plate; 21. shifting plate; 22. die seat; 23. punch; 24. top block; 25. positioning groove; 26. positioning block; 27. anti-slip plate; 28. anti-slip groove; 29. ​​avoidance groove; 30. mounting plate; 31. positioning rod; 32. positioning rail; 33. robotic arm; 34. crossbeam. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0029] It should be understood by those skilled in the art that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0030] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0031] like Figures 1-10The present invention provides a double-clamp tube end processing equipment with a self-locking mechanism, comprising a workbench 1, a double-clamp positioning mechanism arranged on the workbench 1, and a tube end processing mechanism arranged on the workbench 1 and matching the double-clamp positioning mechanism, the double-clamp positioning mechanism comprising a first main clamp 2 and a second main clamp 3 arranged relatively to each other, the first main clamp 2 is provided with a first sub-clamp 4 for movement on the side, the second main clamp 3 is provided with a second sub-clamp 5 for movement on the side, the first sub-clamp 4 and the second sub-clamp 5 are arranged relatively to each other, and the first sub-clamp 4 and the second sub-clamp 5 are both provided with sliding guide blocks 6 on the sides, the sliding guide blocks 6 are provided with push blocks 7 for movement on the sides, the push blocks 7 and the sliding guide blocks 6 are wedge-matched through an inclined surface 8, so that when the push block 7 moves, the sliding guide block 6 presses against or moves away from the first sub-clamp 4 and the second sub-clamp 5.

[0032] When processing the ends of shorter pipe fittings, the pipe fittings are first clamped and positioned by the first main clamp and the second main clamp, and then the push block cooperates with the inclined surface to push the sliding guide block with an oblique wedge, so that the movement of the push block can synchronously control the sliding guide block to tighten the first sub-clamp and the second sub-clamp, thereby allowing the first sub-clamp and the second sub-clamp to perform a secondary clamping on the pipe fitting. While improving the stability of pipe processing, since there is no need to add components such as oil cylinders, the addition of sub-clamps will not occupy too much space, thereby ensuring that shorter pipe fittings can still be stably processed under the positioning of the double clamps.

[0033] In one embodiment of this solution, the first main clamping die is fixed, and the second main clamping die is opened and closed by a cylinder to control the clamping.

[0034] In a preferred embodiment of this scheme, the push block moves in the vertical direction and the sliding guide block moves in the horizontal direction, so that the push block can control the tightening or separation of the sliding guide block through the inclined wedge cooperation method; and the bottom of the push block can be controlled to rise and fall by the cylinder. Although the cylinder control method is also adopted, the inclined wedge cooperation can transfer the cylinder drive component to a position away from the double clamp positioning mechanism to avoid the additional cylinder affecting the pipe end processing.

[0035] Preferably, the push block 7 is provided with a guide groove 9 , and the side of the sliding guide block 6 is provided with a guide bar 10 that is movably matched with the guide groove 9 , and the guide groove 9 is arranged parallel to the inclined surface 8 .

[0036] Specifically, when the push block guides the sliding guide block to move, the guide bar and the guide groove can be coordinated to keep a close connection between the sliding guide block and the push block, thereby ensuring that the push block can stably push the sliding guide block through the inclined surface for use.

[0037] At the same time, the parallel arrangement of the guide groove and the inclined surface can ensure that the guide strip will not be stuck in the guide groove, thereby improving the stability of the sliding guide block moving along the inclined surface.

[0038] Preferably, at least two first pressure plates 11 are fixedly provided on the side of the first main clamp 2, and at least two first pressure plates 11 are placed on both sides of the first auxiliary clamp 4, and at least two second pressure plates 12 are fixedly provided on the side of the second main clamp 3, and at least two second pressure plates 12 are placed on both sides of the second auxiliary clamp 5.

[0039] Specifically, the upper and lower sides of the first sub-clamp are positioned by the first pressure plate, and the upper and lower sides of the second sub-clamp are positioned by the second pressure plate, so that the first sub-clamp and the second sub-clamp can be guided in the direction of movement by the pressure plate during the movement with the sliding guide block, thereby ensuring the accuracy of the secondary clamping position of the sub-clamp on the pipe fitting.

[0040] Among them, the first pressure plate is fixed at the first main clamp, and the second pressure plate is fixed at the second main clamp. The advantage of this arrangement is that after the first main clamp and the second main clamp perform preliminary positioning of the pipe fitting, the first pressure plate and the second pressure plate can ensure the accurate guidance of the auxiliary clamp, thereby ensuring that the clamping position of the auxiliary clamp is consistent with the main clamp.

[0041] Preferably, grooves 13 are provided on the sides of the first pressing plate 11 and the second pressing plate 12, and the side of the sliding guide block 6 has a flange 14 that is movably matched with the groove 13, so that when the sliding guide block 6 moves, the flange 14 moves along the groove 13.

[0042] Specifically, after the main clamp is initially clamped, the sliding guide block is pushed by the push block. At this time, due to the setting of the first pressure plate and the second pressure plate, not only the auxiliary clamp can be guided, but also the movement of the flange and the groove can be coordinated to make the pressure plate guide the moving direction of the sliding guide block, thereby improving the accuracy of the pushing position of the sliding guide block on the auxiliary clamp.

[0043] Preferably, a guide rod 15 is telescopically arranged between the sliding guide block 6 and the first pressure plate 11, and between the sliding guide block 6 and the second pressure plate 12, the elastic member 16 is sleeved on the outer periphery of the guide rod 15, and a limiting groove 17 is provided at the sliding guide block 6, and a first limiting pin 18 matching the limiting groove 17 is provided on the side of the first main clamp 2, and a second limiting pin 19 matching the limiting groove 17 is provided on the side of the second main clamp 3.

[0044] Specifically, when loosening the pipe fittings, the push block moves downward, so that the sliding guide block is reset through the wedge fit and the pushing action of the elastic member. Due to the structural setting of the guide rod and the flange, the sliding guide block can be reset horizontally, ensuring that the sliding guide block drives the auxiliary clamp to accurately loosen the material.

[0045] At the same time, during the movement of the sliding guide block, the movement stroke of the sliding guide block is limited by the limit pins through the cooperation of the first limit pin / the second limit pin and the limit groove, and since the limit pins are fixedly connected to the main clamp, the movement stroke of the sliding guide block is actually limited by the position of the main clamp. The advantage of this arrangement is that when the main clamp still remains in a positioned state, the movement of the sliding guide block is limited by the limit pins, which prevents the sliding guide block from driving the auxiliary clamp to loosen too quickly or too far, so as to ensure stable and orderly loosening operation of the pipe fittings.

[0046] Among them, the telescopic setting method of the guide rod can adopt a telescopic rod structure, the guide rod can be retracted to the inside of the pressure plate, etc., the elastic part can adopt a spring structure, and the limiting groove can adopt a waist hole form.

[0047] Preferably, the tube end processing mechanism includes a base plate 20 provided on the workbench 1, and a transposition plate 21 movably provided on the base plate 20, and a plurality of die seats 22 are movably provided on the transposition plate 21, so that the die seat 22 drives the punch 23 close to or away from the tube end; and a top block 24 is movably provided on the side of the base plate 20, and the top block 24 is provided with a positioning groove 25, and a plurality of die seats 22 are provided with a positioning block 26 matching the positioning groove 25 at one end close to the top block 24, so that after the transposition plate 21 drives the plurality of die seats 22 to move to the specified position, the positioning block 26 of one of the die seats 22 is clamped in the positioning groove 25.

[0048] Specifically, after the pipe fitting is positioned by the double-clamp positioning mechanism, the shifting plate is moved relative to the bottom plate, so that several die seats move to the specified position with the shifting plate, that is, the punch to be used is aligned with the pipe end position. At this time, the positioning block at the end of the die seat to be used is clamped in the positioning groove, and the top block is moved and pushed, so that the die seat moves toward the pipe end under the pushing action of the positioning block, and then the pipe end is stamped by the punch, and after the processing is completed, the die seat is reset by the reset movement of the top block.

[0049] In the subsequent pipe end processing process, when the shifting plate drives several die seats to shift and move, each positioning block passes through the positioning groove in turn, and after the shifting is completed, one of the positioning blocks is clamped and left in the positioning groove to ensure the stable use of the positioning block.

[0050] In one embodiment of the present scheme, a guide rail is provided on the bottom plate and is in movably coordinated with the transposition plate. The transposition plate is controlled to move along the guide rail by a servo motor and a screw drive. The top block is moved by a cylinder control. Several guide rails are provided on the transposition plate and are in movably coordinated with the die seat, so that the top block drives the die seat to move along the guide rail.

[0051] In a preferred embodiment of this solution, the positioning block and the positioning groove are both arranged in a "T"-shaped structure.

[0052] Preferably, an anti-skid plate 27 is provided on the upper side of the base plate 20, and several die seats 22 are provided with anti-skid grooves 28 matching the anti-skid plate 27 on one side close to the anti-skid plate 27, and an avoidance groove 29 is provided on the side of the anti-skid plate 27, and the avoidance groove 29 corresponds to the top block 24.

[0053] Specifically, when the position change plate drives the die seat to move, each anti-slip groove moves relative to the side of the anti-slip plate, and the anti-slip plate limits the die seat to prevent the die seat from moving on its own and causing the positioning block to be unable to match and engage with the positioning groove.

[0054] At the same time, after the replacement is completed, due to the setting of the avoidance groove, the die seat to be used can pass through the avoidance groove structure, so that when the top block pushes the die seat to move, the anti-slip groove will be separated from the limit of the anti-slip plate through the avoidance groove, thereby ensuring the stamping stability of the die seat to be used while the position of the remaining die seats is stable.

[0055] Preferably, a positioning component is provided on the side of the base plate 20, and the positioning component includes a mounting plate 30 movably provided on the side of the base plate 20, the moving direction of the mounting plate 30 is consistent with the moving direction of the die seat 22, and the side of the mounting plate 30 has a positioning rod 31 that matches the pipe end.

[0056] Specifically, when the pipe fitting is clamped and ready for pipe end processing, the pipe end is first positioned by the positioning component. At this time, the positioning rod is extended between the pipe end and the punch. Then the mounting plate moves toward the pipe end along the moving direction of the die seat, so that the positioning rod contacts the pipe end position. The current pipe end position can be known to ensure accurate stamping of the punch.

[0057] In one embodiment of the present scheme, a pressure sensor is provided at the positioning rod. When the positioning rod contacts the tube end, the pressure sensor detects the position of the tube end, thereby ensuring that the punch can increase a certain stamping stroke based on the detected position of the tube end to ensure the accuracy of the stamping position.

[0058] Among them, the side of the base plate is provided with a guide rail that is in movable cooperation with the mounting plate, and the mounting plate is controlled to move along the guide rail by a rodless cylinder.

[0059] Preferably, a positioning track 32 is provided on the mounting plate 30 , and the positioning rod 31 is movably matched with the positioning track 32 , and the positioning rod 31 moves in an inclined manner.

[0060] Specifically, the telescopic movement of the positioning rod is guided by the positioning rail, and due to the inclined movement setting of the positioning rod, the positioning process of the positioning rod can avoid the upper side of the punch and the clamp, which is conducive to personnel observation and can ensure that a larger space is left on the upper side of the double-clamp positioning mechanism, which is convenient for maintenance of the various components of the double-clamp positioning mechanism.

[0061] Among them, a cylinder is installed at the positioning plate, so that the cylinder controls the positioning rod to move and retract along the positioning guide rail, so that after the positioning is completed, the positioning rod can retract and retreat to make room for the punch to punch the pipe end.

[0062] Preferably, a robotic arm 33 is provided on the workbench 1, and the robotic arm 33 is movably provided at the crossbeam 34, and the end of the robotic arm 33 has a clamping claw for clamping the workpiece, so that the robotic arm 33 can drive the workpiece to move and shift between adjacent double-clamp positioning mechanisms.

[0063] Specifically, since some pipe fittings need to be processed with double-headed pipe ends, two sets of double-clamp positioning mechanisms and two sets of pipe end processing mechanisms can be set up at the same time for double-headed pipe end processing. After the pipe fittings are clamped at the first set of double-clamp positioning mechanisms for manual loading or loading by a robotic arm for pipe end processing, the robotic arm descends and clamps the pipe fittings through the clamping claws, and releases the material through the first set of double-clamp positioning mechanisms. Then the robotic arm rises and moves horizontally along the beam to the second set of double-clamp positioning mechanisms, and through the steps of turning, descending, and releasing the clamping claws, cooperates with the second set of double-clamp positioning mechanisms to clamp and fix the pipe fittings after the head change, and then processes the other pipe end through the second set of pipe end processing mechanisms.

[0064] Among them, the lifting and lowering mode of the robotic arm can be controlled by a servo motor and a screw transmission. The clamping and releasing of the clamping jaws are controlled by a cylinder, and the rotation of the clamping jaws is controlled by a motor to reverse the direction of the pipe. A guide rail is provided at the beam, and the movement of the robotic arm along the beam is controlled by a servo motor and a screw transmission.

[0065] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. A double-clamp tube end processing device with a self-locking mechanism, characterized by: The invention comprises a workbench (1), a double-clamp positioning mechanism arranged on the workbench (1), and a pipe end processing mechanism arranged on the workbench (1) and matched with the double-clamp positioning mechanism, wherein the double-clamp positioning mechanism comprises a first main clamp (2) and a second main clamp (3) arranged relatively to each other, the first main clamp (2) is provided with a first auxiliary clamp (4) for side movement, the second main clamp (3) is provided with a second auxiliary clamp (5) for side movement, the first auxiliary clamp (4) and the second auxiliary clamp (5) are arranged relatively to each other, and the first auxiliary clamp (4) and the second auxiliary clamp (5) are both provided with sliding guide blocks (6) for side movement, the sliding guide blocks (6) are provided with push blocks (7) for side movement, and the push blocks (7) and the sliding guide blocks (6) are wedge-matched through inclined surfaces (8) so that when the push blocks (7) move, the sliding guide blocks (6) press against or move away from the first auxiliary clamp (4) and the second auxiliary clamp (5).

2. The double-clamping die tube end processing equipment with a self-locking mechanism according to claim 1 is characterized in that: The push block (7) is provided with a guide groove (9), and the side of the sliding guide block (6) is provided with a guide strip (10) that is movably matched with the guide groove (9), and the guide groove (9) is arranged in parallel with the inclined surface (8).

3. The double-clamping die tube end processing equipment with a self-locking mechanism according to claim 1, characterized in that: At least two first pressing plates (11) are fixedly provided on the side of the first main clamp (2), and the at least two first pressing plates (11) are respectively placed on both sides of the first auxiliary clamp (4); at least two second pressing plates (12) are fixedly provided on the side of the second main clamp (3), and the at least two second pressing plates (12) are respectively placed on both sides of the second auxiliary clamp (5).

4. The double-clamping die pipe end processing equipment with a self-locking mechanism according to claim 3, characterized in that: The sides of the first pressing plate (11) and the second pressing plate (12) are both provided with grooves (13), and the side of the sliding guide block (6) has a flange (14) that is movably matched with the groove (13), so that when the sliding guide block (6) moves, the flange (14) moves along the groove (13).

5. The double-clamping die pipe end processing equipment with a self-locking mechanism according to claim 3, characterized in that: A guide rod (15) is telescopically arranged between the sliding guide block (6) and the first pressure plate (11) and between the sliding guide block (6) and the second pressure plate (12), an elastic member (16) is sleeved on the outer periphery of the guide rod (15), and a limiting groove (17) is provided at the sliding guide block (6), a first limiting pin (18) matching the limiting groove (17) is provided on the side of the first main clamp (2), and a second limiting pin (19) matching the limiting groove (17) is provided on the side of the second main clamp (3).

6. The double-clamping die pipe end processing equipment with a self-locking mechanism according to claim 1, characterized in that: The pipe end processing mechanism comprises a bottom plate (20) arranged on the workbench (1), a position change plate (21) movably arranged on the bottom plate (20), a plurality of die seats (22) movably arranged on the position change plate (21), so that the die seats (22) drive the punch (23) close to or away from the pipe end; and a top block (24) movably arranged on the side of the bottom plate (20), the top block (24) is provided with a positioning groove (25), and a positioning block (26) matching the positioning groove (25) is provided at one end of the plurality of die seats (22) close to the top block (24), so that after the position change plate (21) drives the plurality of die seats (22) to move to a specified position, the positioning block (26) of one of the die seats (22) is clamped in the positioning groove (25).

7. The double-clamping die pipe end processing equipment with a self-locking mechanism according to claim 6, characterized in that: An anti-skid plate (27) is provided on the upper side of the bottom plate (20), and a plurality of die seats (22) are provided with anti-skid grooves (28) matching the anti-skid plate (27) on one side close to the anti-skid plate (27), and an avoidance groove (29) is provided on the side of the anti-skid plate (27), and the avoidance groove (29) corresponds to the top block (24).

8. The double-clamping die pipe end processing equipment with a self-locking mechanism according to claim 6, characterized in that: A positioning component is provided on the side of the base plate (20), and the positioning component includes a mounting plate (30) movably provided on the side of the base plate (20), the moving direction of the mounting plate (30) is consistent with the moving direction of the die seat (22), and the side of the mounting plate (30) has a positioning rod (31) that matches the pipe end.

9. The double-clamping die pipe end processing equipment with a self-locking mechanism according to claim 8, characterized in that: A positioning track (32) is provided on the mounting plate (30), the positioning rod (31) is in movable cooperation with the positioning track (32), and the positioning rod (31) moves in an inclined manner.

10. The double-clamping die pipe end processing equipment with a self-locking mechanism according to claim 1, characterized in that: A mechanical arm (33) is provided on the workbench (1), the mechanical arm (33) is movably provided at the crossbeam (34), and the end of the mechanical arm (33) has a clamping claw for clamping a workpiece, so that the mechanical arm (33) can drive the workpiece to move and transpose between adjacent double clamping mold positioning mechanisms.

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