Pipe fitting necking equipment

Abstract

The invention discloses pipe fitting necking-down equipment, and relates to the technical field of pipe fitting orifice machining, the pipe fitting necking-down equipment comprises a workbench, a mounting frame is arranged at the bottom of the workbench, a mounting groove is formed in the workbench, a stamping structure is arranged in the mounting groove, and first fixing plates are arranged at the positions, at the two ends of the mounting groove, of the workbench; first supporting columns are arranged on the opposite side faces of the two first fixing plates, the first supporting columns are connected with the stamping structure, second supporting columns are installed at the top and the bottom of the forming base, second fixing plates are installed on the second supporting columns, and driving mechanisms are installed on the side faces of the first fixing plates and the side faces of the second fixing plates. The square pipe fitting is placed in the forming base of the stamping structure, the driving mechanism is connected with the stamping structure, the driving mechanism drives the stamping male dies of the stamping structure to push towards the side wall of the square pipe fitting, the first driving piece drives the driving rod, and the four stamping male dies are pushed towards the square pipe fitting at the same time till the end opening of the square pipe fitting is stamped into a necking opening.

Description

Technical Field

[0001] The present application relates to the technical field of pipe necking, and in particular to a pipe necking device. Background Art

[0002] At present, most square pipe fittings are connected by stretching the ends of the square pipe fittings to form shrinkage, and then connecting with other square pipe fittings. The stretching and shrinking of the square pipe fittings is complicated to make and cannot be mass-produced.

[0003] With respect to the above-mentioned related technologies, the inventor believes that the production of the shrinkage of square tubes by stretching is too complicated and not conducive to mass production. Summary of the invention

[0004] The purpose of the present application is to provide a pipe necking device to improve the problem of complex necking production formed by stretching square pipes.

[0005] The present application provides a pipe necking device, which adopts the following technical solution: A pipe shrinking device comprises a workbench, a mounting frame is provided at the bottom of the workbench, a stamping structure is provided on the workbench, a mounting groove is opened on the workbench, a stamping structure is provided in the mounting groove, a fixing plate 1 is provided at both ends of the mounting groove on the workbench, a supporting column 1 is provided on the opposite sides of the two fixing plates 1, the supporting column 1 is connected to the stamping structure, a driving mechanism is provided on the side of the fixing plate 1, the driving mechanism is connected to the stamping structure, and a square pipe fitting is placed in the stamping structure.

[0006] By adopting the above technical solution, a fixed plate is set on the workbench, a pair of support columns are set on the fixed plate to connect the stamping structure, the position of the stamping structure is limited by the installation groove, and the stamping structure is driven by the driving mechanism to stamp the two surfaces of the square pipe fitting first, and then the square pipe fitting is taken out and the angle is adjusted to stamp the other two surfaces of the pipe fitting, so that the port of the square pipe fitting is stamped to form a shrinkage.

[0007] Optionally, the stamping structure includes a forming seat and a plurality of stamping punches, the bottom of the forming seat corresponds to the mounting groove of the workbench, the two side surfaces of the forming seat are connected to support column one, a fixing groove one is provided through the center of the end surface of the forming seat, a fixing groove two is provided through the center of the top of the forming seat, the plurality of stamping punches are respectively provided in fixing groove one and fixing groove two, and the driving mechanism is connected to the stamping punches.

[0008] By adopting the above technical solution, a first fixing groove and a second fixing groove are opened on the forming seat, a punch is set in the fixing groove, and the punch is driven by a driving mechanism to punch the square pipe fitting to form a shrinkage.

[0009] Optionally, a positioning groove 1 is provided through the center of the side surface of the forming seat, and the positioning groove 1 is communicated with the fixing groove 1 and the fixing groove 2. The square tube is arranged in the positioning groove 1, and the driving mechanism drives the stamping punch to abut against the side wall of the square tube.

[0010] By adopting the above technical solution, a positioning groove is opened on the side of the forming seat, and the square tube fitting is placed in the positioning groove, so that the stamping punch is abutted against the side wall of the square tube fitting, and the driving mechanism drives the stamping structure to stamp the side wall of the square tube fitting, and the port of the square tube fitting is stamped to form a shrinkage.

[0011] Optionally, the driving mechanism is provided on the side of the fixed plate 1 away from the stamping punch, the top and bottom of the fixing groove 2 provided on the forming seat are provided with a plurality of supporting columns 2, the supporting columns 2 are provided with a fixing plate 2 at the end away from the stamping punch, and the fixing plate 2 is also provided with the driving mechanism on the side away from the stamping punch.

[0012] By adopting the above technical solution, driving mechanisms are also installed on the top and bottom of the forming seat, so that the four side walls of the square tube can be stamped simultaneously, thereby improving the forming efficiency of the square tube shrinkage.

[0013] Optionally, a limiting block is provided at one end of the stamping punch away from the forming seat, the driving mechanism is connected to the end of the limiting block away from the stamping punch, the driving mechanism includes a driving member and a driving rod, the driving rod is connected to the driving member, the end of the driving rod away from the driving member is connected to a connecting block, and the connecting block is connected to the end of the limiting block away from the stamping punch.

[0014] By adopting the above technical scheme, the position of the stamping punch is limited by a limit block to prevent the stamping punch from completely entering the fixing groove 1 and the fixing groove 2 to damage the side wall of the square pipe fitting. The driving member 1 drives the driving rod 1 to drive the stamping punch, so that the stamping punch punches the port of the square pipe fitting to form a shrinkage, making the shrinkage production of the square pipe fitting more convenient and quick.

[0015] Optionally, the forming seat is provided with a support plate on the side away from the square tube fitting, the support plate is connected to the workbench, the support plate is provided with a stopper at a position corresponding to the positioning groove, the stopper abuts against the port of the square tube fitting, and the stopper is provided with an adsorption part at one end close to the square tube fitting, and the adsorption part is adsorbed on the square tube fitting.

[0016] By adopting the above technical scheme, a support plate is installed on the side of the forming seat away from the square tube fitting, and a stopper inserted in the positioning groove 1 is provided on the support plate. The square tube fitting is blocked by the stopper to prevent the square tube fitting from rushing out of the positioning groove 1 on the other side of the forming seat, causing the stamping position of the stamping punch on the square tube fitting to shift, resulting in failure of the shrinkage of the square tube fitting. The square tube fitting is adsorbed by an adsorption part to prevent the square tube fitting from detaching from the positioning groove 1 during the stamping process, thereby affecting the shrinkage of the square tube fitting.

[0017] Optionally, the fixing plate 1 and the fixing plate 2 are provided with a fixing block 1 at one end close to the driving member 1, the fixing block 1 is provided with a connecting groove, and the driving member 1 is fitted with the inner side wall of the connecting groove. The driving member 1 is provided with a fixing block 2 at one end away from the fixing block 1, and a connecting rod is inserted between the fixing block 2 and the fixing block 1, and the connecting rod connects the fixing block 1 and the fixing block 2.

[0018] By adopting the above technical solution, the driving member 1 is further fixed by the connecting groove on the fixing block 1 to prevent the driving member 1 from being separated from the fixing plate 1 and the fixing plate 2, thereby affecting the production of the shrinkage of the square tube fitting. The fixing block 2 is set at the end of the driving member 1 away from the stamping punch, and the driving member 1 is fixed again to prevent the driving member 1 from being separated from the fixing block 2, so that the driving member 1 can stably drive the stamping punch to perform the stamping and shrinking of the square tube fitting.

[0019] Optionally, the forming seat is provided with a slot on the end face away from the square tube fitting, the slot is communicated with a fixing slot 1, a heating coil is arranged in the slot, the heating coil corresponds to the port of the square tube fitting, and a driving member 2 is arranged at the end of the heating coil away from the square tube fitting, the driving member 2 is connected to the support plate, a driving rod 2 of the driving member 2 pushes the heating coil to move in the slot, a micro switch is arranged on the block, and the micro switch is electrically connected to the driving member 2.

[0020] By adopting the above technical solution, after the square tube collides with the block, the micro switch on the block controls the second driving member to drive the heating coil to move toward the square tube, and the heating coil is used to heat the port position of the square tube. After heating for a period of time, the second micro switch driving member drives the second driving rod to move the heating coil out of the slot until the end of the heating coil away from the second driving member corresponds to the end of the block provided with the adsorbent, and the first driving member drives the stamping punch to stamp the heated square tube, so that the shrinkage of the square tube is easier to form.

[0021] Optionally, the workbench is provided with support frames on both sides of the square tube fitting, and the support frame is provided with a driving member three on one side of the square tube fitting, and gears one that mesh with each other and fit with the bottom of the square tube fitting are rotatably provided on the two support frames, and the driving member three drives the gear one to rotate and drives another gear one to rotate, and the driving member three is electrically connected to the micro switch, and the gear one is provided with a guide wheel rotatably connected to the support frame, and the guide wheel is provided with a positioning groove three corresponding to the side wall of the square tube fitting, and the positioning groove three corresponds to the positioning groove one of the forming seat, and the positioning groove three is provided with an attachment that fits with the side wall of the square tube fitting, and the driving member three drives the two gears one to drive the guide wheels to rotate relative to each other, so that the square tube fitting moves in the rotation direction of the gear one, so that the square tube fitting enters the positioning groove one.

[0022] By adopting the above technical scheme, the square tube is placed in the positioning groove three of the two guide wheels, so that the side wall of the square tube fits with the attachment arranged in the positioning groove three, and the guide wheel is driven to rotate by the relative rotation of the gear one arranged on the support frame, and the gear one is driven by the driving member three to drive another gear one to rotate, so that the square tube moves in the direction of rotation of the gear one, and the square tube is sent into the positioning groove one of the forming seat. When the square tube collides with the block, the micro switch starts to control the driving member three to stop rotating. After the square tube is stamped, the micro switch controls the driving member three to drive the gear one to rotate in the opposite direction to send the square tube out of the forming seat, so that the square tube can accurately enter the forming seat, and at the same time, the square tube is sent out after the stamping of the square tube is completed to avoid burns to workers caused by the uncooled square tube.

[0023] Optionally, a driving member four is provided on one side of the support frame located on the square tube fitting, and the driving member four is electrically connected to the micro switch, and a clamping block one in contact with the square tube fitting is provided on the driving member four, and a clamping block two is rotatably provided on the clamping block one, and a top column in contact with the square tube fitting is provided on the clamping block one, and the top column is connected to the clamping block two, and the driving member four drives the square tube fitting to move into the positioning groove one when the guide wheel rotates, and when the square tube fitting abuts against the block, the micro switch controls the driving member four to drive the clamping block one and the clamping block two to clamp and fix the square tube fitting.

[0024] By adopting the above technical scheme, after the square tube collides with the block, the microswitch controls the driving component three to stop running, controls the driving component four to drive the clamping block one to abut against the square tube, and the top column in the clamping block one contacts the square tube and moves downward to push the clamping block two to rotate around the clamping block one, thereby tightening and fixing the square tube. After the square tube is stamped, the microswitch controls the driving component four to drive the clamping block one away from the square tube, and the top column one causes the clamping block two to rotate in the direction away from the tube, and the clamping blocks one and two release the fixation on the square tube, and then the microswitch controls the driving component three to rotate in the opposite direction to drive the stamped square tube away from the forming seat.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Place the square tube into the forming seat, and the punch is set in the fixed groove 1 and the fixed groove 2 of the forming seat. The top of the punch corresponds to the side wall of the square tube. The driving member 1 pushes the punch to abut against the side wall of the square tube through the driving rod 1. The square tube is punched through the forming seat and the punch, so that the shrinkage of the square tube can be quickly punched in the forming seat. 2. Use the driving member 3 set on the support frame to drive the gear 1 to rotate relatively to drive the guide wheel to rotate, so that the square tube moves in the direction of rotation of the gear 1, and the square tube is sent into the positioning groove 1 of the forming seat through the attachment in the positioning groove 3 on the guide wheel. After the square tube is stamped, the gear 1 rotates in the opposite direction to send the square tube out of the forming seat to avoid burns to workers caused by the uncooled square tube; 3. A mounting seat is provided at the front end of the forming seat, and a positioning groove 2 communicated with the positioning groove 1 is provided on the mounting seat, so that the square tube fitting does not need to be fully aligned with the positioning groove 1 when placed in the forming seat, and the placement of the square tube fitting is more convenient and quick. A support plate is provided at the rear end of the forming seat, and a stopper corresponding to the side wall of the positioning groove 1 is installed on the support plate. The front end of the stopper is abutted against the front end of the square tube fitting to prevent the square tube fitting from passing through the forming seat. After the square tube fitting collides with the stopper, the micro switch controls the driving member 3 to stop running, and controls the driving member 4 to drive the clamping block 1 to abut against the square tube fitting. After the top column in the clamping block 1 contacts the square tube fitting, it moves downward and pushes the clamping block 2 to rotate around the clamping block 1, so as to tighten and fix the square tube fitting to prevent the square tube fitting from detaching from the forming seat and affecting the shrinkage stamping of the square tube fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of a pipe shrinking device.

[0027] Figure 2 yes Figure 1 A partial enlarged view of middle A.

[0028] Figure 3It is a partial cross-sectional view of the rear portion of the pipe shrinking equipment.

[0029] Figure 4 yes Figure 3 A partial enlarged view of B.

[0030] Figure 5 yes Figure 1 Front section view of .

[0031] In the figure, 1, workbench; 11, mounting groove; 12, mounting frame; 2, stamping structure; 21, forming seat; 211, fixing groove 1; 212, fixing groove 2; 213, positioning groove 1; 22, stamping punch; 221, limit block; 3, driving mechanism; 31, driving member 1; 32, driving rod 1; 4, square pipe; 5, supporting column 1; 6, supporting column 2; 7, fixing plate 1; 8, fixing plate 2; 9, mounting seat; 91, groove; 92, positioning groove 2; 10, supporting plate; 101. Block; 102. Adsorption member; 13. Connecting block; 14. Connecting rod; 15. Fixed block 1; 16. Fixed block 2; 17. Connecting slot; 18. Slot; 19. Heating coil; 20. Micro switch; 24. Driving member 2; 25. Driving rod 2; 26. Support frame; 27. Gear 1; 28. Guide wheel; 281. Positioning slot 3; 29. ​​Attachment; 30. Driving member 3; 36. Driving member 4; 37. Clamping block 1; 371. Top column; 38. Clamping block 2. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.

[0033] A pipe shrinking device, referring to Figure 1 , including a workbench 1, the workbench 1 is welded and fixed to a mounting frame 12, a mounting groove 11 is opened on the surface of the workbench 1, two fixing plates 7 are welded on both sides of the mounting groove 11 on the workbench 1, a stamping structure 2 is fixed in the mounting groove 11 of the workbench 1, the stamping structure 2 includes a forming seat 21 and a stamping punch 22, support columns 5 are evenly welded on both end surfaces of the forming seat 21, the support columns 5 are connected and fixed to the fixing plates 7 by hexagon socket bolts, the side surfaces of the support columns 5 are against the upper surface of the workbench 1, the forming seat 21 is fixed above the workbench 1, and the forming seat 21 is prevented from falling off from the mounting groove 11.

[0034] Reference Figure 1 and Figure 3A support column 26 is welded on the top and bottom of the forming seat 21, and a fixing plate 28 is fixed to the support column 26 with a hexagon socket bolt. A driving mechanism 3 is fixed to the sides of the fixing plates 17 and 28. The driving mechanism 3 includes a driving member 31 and a driving rod 32 connected to the driving member 31. The driving member 31 is a stamping oil cylinder connected to the oil tank through an oil pipe. The driving rod 32 is a stamping rod. A fixing block 15 is welded on the sides of the fixing plates 17 and 28. A connecting groove 17 is provided on the fixing block 15. The hydraulic cylinder is fixed to the fixing block 15 through the connecting groove 17 by bolts. A fixing block 26 is bolted to the end of the hydraulic cylinder. The bottom end of the connecting rod 14 is welded to the fixing block 15. A thread is provided on the top of the connecting rod 14. The connecting rod 14 passes through the fixing block 26 and is fixed with a nut.

[0035] Reference Figures 1 to 3 The two support frames 26 are fixed to the workbench 1 on both sides of the square pipe 4 with bolts, and the gear 1 27 is horizontally rotatably connected to the two support frames 26 through the bearing. A horizontal guide wheel 28 is bolted to the gear 1 27, and a positioning groove 3 281 corresponding to the side wall of the square pipe 4 is opened on the guide wheel 28. The two gears 1 27 on the positioning support frame 26 are meshed with each other, and the gear 1 27 is driven to rotate by meshing the rotating shaft of the driving member 3 30 fixed to the support frame 26 with the gear 1 27, and the driving member 3 3 0 is a small motor connected to a power source, thereby driving a gear 27 on another support frame 26 to rotate relatively, so that the guide wheel 28 rotates relatively, and the positioning groove 3 281 on the guide wheel 28 fixes the square tube 4, so that the square tube 4 moves toward the positioning groove 1 213 with the relative rotation of the two gears 27, and an attachment 29 is installed on the inner side wall of the square tube 4 and the positioning groove 3 281. The attachment 29 is a heat-resistant rubber pad, which increases the friction of the side wall of the square tube 4 to prevent the square tube 4 from being unable to move with the rotation of the guide wheel 28.

[0036] Reference Figures 1 to 3After the square tube 4 abuts against the stopper 101 set in the positioning groove 1 213, the micro switch 20 on the stopper 101 controls the driving member 3 30 to stop, and the micro switch 20 controls the driving member 4 36 to drive the clamping block 1 37 to move up and contact with the square tube 4. The driving member 4 36 is a cylinder connected to a power supply, so that the top column 371 on the clamping block 1 37 contacts with the square tube 4, and the top column 371 moves down, and pushes the clamping block 2 38 which is rotatably connected to the clamping block 1 37 through the rotating shaft, so that the clamping block 2 38 rotates and contacts with the square tube. The square tube 4 is pressed against each other, so that the clamping block 1 37 and the clamping block 2 38 tighten and fix the square tube 4 to prevent the unpunched square tube 4 from being pulled out of the positioning groove 1 213. After the square tube 4 is punched, the micro switch 20 controls the driving member 4 36 to drive the clamping block 1 37 to move down, the top column 371 to move up, and the clamping block 2 38 to rotate away from the square tube 4, so that the two clamping blocks release the square tube 4. The driving member 3 30 drives the gear 1 27 to rotate in the opposite direction, driving the guide wheel 28 to bring the square tube 4 out of the positioning groove 1 213.

[0037] Reference Figures 1 to 5 The connecting block 13 is bolted to the end of the driving rod 1 32, and the other side of the connecting block 13 is bolted to the stopper 221 of the punch 22, and the punch 22 is welded and fixed to the stopper 221, and the stopper 221 is used to prevent the punch 22 from being completely pressed into the forming seat 21 and causing damage to the square pipe 4. A fixing groove 1 211 is provided in the center of the end surface of the forming seat 21, a fixing groove 212 is provided in the center of the top of the forming seat 21, and a positioning groove 1 213 is provided in the center of the side surface of the forming seat 21. The punching head of the punching punch 22 is conical, and the conical punching head of the punching punch 22 abuts against the side wall of the square tube 4. The hydraulic cylinder serving as a driving member 31 pushes the punching punch 22, so that the conical punching head of the punching punch 22 punches the square tube 4, squeezes the side wall of the square tube 4 inward, and punches the end of the square tube 4 into a cross-shaped shrinkage, so that the shrinkage of the square tube 4 can be connected to the port of another square tube 4 by insertion. The punching punch 22 fits the side walls of the fixing groove 1 211 and the fixing groove 2 212. A mounting seat 9 is fixed by bolts in the center of the side surface of the forming seat 21, and a groove 91 is provided in the mounting seat 9. A positioning groove 2 92 is provided in the groove 91 and communicates with the positioning groove 1 213.

[0038] Reference Figures 1 to 5The square tube fitting 4 passes through the positioning groove 2 92 of the mounting seat 9 and the positioning groove 1 213 on the side of the forming seat 21, and the square tube fitting 4 is placed in the forming seat 21. The punching head of the punch 22 corresponds to the side wall of the square tube fitting 4. A support plate 10 is provided at one end of the forming seat 21 away from the square tube fitting 4. The support plate 10 is welded on the workbench 1, and a stopper 101 is fixed on the support plate 10 with bolts. The stopper 101 fits with the side wall of the positioning groove 1 213, and the stopper 101 abuts against the square tube fitting 4. An adsorption member 102 is installed in the stopper 101. The adsorption member 102 is a magnet, which adsorbs the square tube fitting 4 to prevent the tube fitting from being separated from the forming seat 21 during the stamping process of the shrinkage of the square tube fitting 4.

[0039] Reference Figures 1 to 5 A circular slot 18 is provided on the end surface of the forming seat 21 away from the square tube 4, and a heating coil 19 is placed in the slot 18. The heating coil 19 is connected to the power supply through a flexible power cord, and the square tube 4 is heated by the heating coil 19. The end of the heating coil 19 away from the square tube 4 is bolted to the driving rod 25 of the driving member 24. The driving member 24 is a pneumatic cylinder, and the driving rod 25 is a pneumatic rod. The driving member 24 is fixed to the support plate 10 by bolts, and a micro switch 20 is fixed to the block 101 by screws. The micro switch 20 includes a contact system, a transmission and a response system, and is electrically connected to the driving member 24 to control the driving member 24 to push the heating coil 19 to heat the square tube 4.

[0040] The implementation principle of the embodiment of the present application is: A fixing plate 17 is installed on the workbench 1, and the forming seat 21 is fixed to the workbench 1 through the supporting column 15 and the fixing plate 17. The supporting column 26 is installed on the top and bottom of the forming seat 21, and the fixing plate 28 is installed on the supporting column 26. The driving member 131 is installed on the side of the fixing plate 17 and the fixing plate 28. A fixing groove 1211, a fixing groove 212 and a positioning groove 1213 are provided on the forming seat 21. A mounting seat 9 is installed on the front end surface of the forming seat 21, and a positioning groove 292 is provided in the mounting seat 9. Four stamping convex dies 22 are arranged in the fixing groove 1211 and the fixing groove 212. The driving rods 132 of the four driving members 31 are connected to the limiting blocks 221 of the stamping convex 22 through the connecting blocks 13. The square tube 4 is placed in the positioning groove three 281 of the guide wheel 28, and the driving member three 30 drives the gear one 27 to rotate relatively, driving the guide wheel 28 to rotate relatively to move the square tube 4 to the positioning groove one 213, so that the square tube 4 passes through the positioning groove one 213 and the positioning groove two 92, and abuts against the block 101 set in the positioning groove one 213. When the micro switch 20 on the fast control drives the driving member three 30 to drive the gear one 27 to stop rotating, the driving member four 36 drives the clamping block one 37 to move up, so that the top column 371 on the clamping block one 37 abuts against the square tube 4, and the top column 371 moves downward to push the clamping block two 38 to rotate around the clamping block one 27 to tighten the square tube 4. The square tube 4 is connected to the adsorption member 102 set in the stopper 101, and the micro switch 20 on the stopper 101 is started to control the driving member 24 on the support plate 10 to drive the driving rod 25 to push the heating coil 19 toward the square tube 4 to heat the square tube 4. After the square tube 4 is heated for a period of time, the micro switch 20 controls the driving member 24 to drive the driving rod 25 to pull the heating coil 19 back to the position of the card slot 18, and then the driving member 1 31 drives the driving rod 1 32 The punch head of the punching punch 22 is pushed toward the side wall of the square tube 4, and the driving rod 1 32 is driven by the driving member 1 31 to push the four punching punches 22 toward the square tube 4 at the same time until the port of the square tube 4 is punched into a cross-shaped shrinkage, and then the micro switch 20 controls the driving member 4 36 to move downward, the clamping block 1 37 and the clamping block 2 38 release the square tube 4, and the driving member 3 30 drives the gear 1 27 to change the direction, so that the guide wheel 28 moves in the opposite direction, and the square tube 4 is brought out of the forming seat 21. The port of the square tube 4 after punching becomes a cross-shaped shrinkage, which is convenient for plugging and connecting with the port of the square tube 4.

[0041] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipe necking device, comprising a workbench (1), wherein a mounting frame (12) is provided at the bottom of the workbench (1), characterized in that: The workbench (1) is provided with a mounting groove (11), a stamping structure (2) is arranged in the mounting groove (11), a fixing plate (7) is arranged at both ends of the mounting groove (11) on the workbench (1), a supporting column (5) is arranged on opposite sides of the two fixing plates (7), the supporting column (5) is connected to the stamping structure (2), a driving mechanism (3) is arranged on the side of the fixing plate (7), the driving mechanism (3) is connected to the stamping structure (2), and a square pipe (4) is placed in the stamping structure (2).

2. A pipe necking device according to claim 1, characterized in that: The stamping structure (2) comprises a forming seat (21) and a plurality of stamping convex dies (22); the bottom of the forming seat (21) corresponds to the mounting groove (11) of the workbench (1); the two end surfaces of the forming seat (21) are connected to the supporting column 1 (5); a fixing groove 1 (211) is provided through the center of the end surface of the forming seat (21); a fixing groove 2 (212) is provided through the top of the forming seat (21); the plurality of stamping convex dies (22) are respectively provided in the fixing groove 1 (211) and the fixing groove 2 (212); and the driving mechanism (3) is connected to the stamping convex dies (22).

3. A pipe necking device according to claim 2, characterized in that: A positioning groove (213) is provided through the side of the forming seat (21), the positioning groove (213) is communicated with the fixing groove (211) and the fixing groove (212), the square tube (4) is located in the positioning groove (213), and the driving mechanism (3) drives the stamping punch (22) to abut against the side wall of the square tube (4).

4. The pipe necking device according to claim 2, characterized in that: The driving mechanism (3) is arranged on the fixing plate 1 (7) at a side away from the punching punch (22); a fixing groove 2 (212) is provided on the forming seat (21) and a plurality of supporting columns 2 (6) are arranged at the top and bottom; a fixing plate 2 (8) is arranged at an end of the supporting column 2 (6) away from the punching punch (22); and the driving mechanism (3) is also arranged on the fixing plate 2 (8) at a side away from the punching punch (22).

5. The pipe necking device according to claim 4, characterized in that: A limiting block (221) is provided at one end of the punching punch (22) away from the forming seat (21); the driving mechanism (3) is connected to the end of the limiting block (221) away from the punching punch (22); the driving mechanism (3) comprises a driving member 1 (31) and a driving rod 1 (32); the driving rod 1 (32) is connected to the driving member 1 (31); the end of the driving rod 1 (32) away from the driving member 1 (31) is connected to a connecting block (13); the connecting block (13) is connected to the end of the limiting block (221) away from the punching punch (22).

6. The pipe necking device according to claim 3, characterized in that: The forming seat (21) is provided with a support plate (10) on a side away from the square tube (4), the support plate (10) is connected to the workbench (1), the support plate (10) is provided with a stopper (101) at a position corresponding to the first positioning groove (213), the stopper (101) abuts against the end of the square tube (4), and the stopper (101) is provided with an adsorption member (102) at one end close to the square tube (4), the adsorption member (102) adsorbs on the square tube (4).

7. The pipe necking device according to claim 4, characterized in that: The fixing plate 1 (7) and the fixing plate 2 (8) are provided with a fixing block 1 (15) at one end close to the driving member 1 (31), and the fixing block 1 (15) is provided with a connecting groove (17), and the driving member 1 (31) is in contact with the inner side wall of the connecting groove (17). The driving member 1 (31) is provided with a fixing block 2 (16) at one end away from the fixing block 1 (15), and a connecting rod (14) is inserted between the fixing block 2 (16) and the fixing block 1 (15), and the connecting rod (14) connects the fixing block 1 (15) and the fixing block 2 (16).

8. The pipe necking device according to claim 6, characterized in that: The forming seat (21) is provided with a slot (18) on the end surface away from the square tube (4), the slot (18) being communicated with the first fixing slot (211), a heating coil (19) being arranged in the slot (18), the heating coil (19) corresponding to the end of the square tube (4), a second driving member (24) being arranged at the end away from the square tube (4), the second driving member (24) being connected to the support plate (10), a second driving rod (25) of the second driving member (24) pushing the heating coil (19) to move in the slot (18), and a micro switch (20) being arranged on the stopper (101), the micro switch (20) being electrically connected to the second driving member (24).

9. The pipe necking device according to claim 8, characterized in that: The workbench (1) is provided with support frames (26) on both sides of the square tube (4); the support frames (26) are provided with a driving member three (30) on one side of the square tube (4); the two support frames (26) are provided with gears one (27) that mesh with each other and fit with the bottom of the square tube (4); the driving member three (30) drives the gear one (27) to rotate and drives the other gear one (27) to rotate; the driving member three (30) is electrically connected to the micro switch (20); the gear one (27) is provided with a guide that is rotatably connected to the support frame (26); The guide wheel (28) is provided with a positioning groove (281) corresponding to the side wall of the square tube (4), the positioning groove (281) corresponds to the positioning groove (213) of the forming seat (21), and an attachment member (29) is arranged in the positioning groove (281) to fit the side wall of the square tube (4). The driving member (30) drives the two gears (27) to drive the guide wheel (28) to rotate relative to each other, so that the square tube (4) moves in the rotation direction of the gear (27) so that the square tube (4) enters the positioning groove (213).

10. The pipe necking device according to claim 9, characterized in that: The support frame (26) is provided with a driving member four (36) on one side of the square tube (4). The driving member four (36) is electrically connected to the micro switch (20). The driving member four (36) is provided with a clamping block one (37) in contact with the square tube (4). The clamping block one (37) is rotatably provided with a clamping block two (38). The clamping block one (37) is provided with a top column (371) in contact with the square tube (4). The top column (371) is connected to the clamping block two (38). The driving member four (36) drives the square tube (4) to move into the positioning groove one (213) when the guide wheel (28) rotates. When the square tube (4) abuts against the stop block (101), the micro switch (20) controls the driving member four (36) to drive the clamping block one (37) and the clamping block two (38) to clamp and fix the square tube (4).

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