Annealing pipe bending and stamping machine

Abstract

The present invention provides an annealing tube bending and punching integrated machine, comprising: a frame; a blanking hopper installed on the frame; an annealing mechanism installed at the rear side of the bottom of the blanking hopper; a centering mechanism installed below a first feeding mechanism; a push-bending mechanism installed in front of the centering mechanism; a second feeding mechanism installed behind the push-bending mechanism; a punching mechanism installed behind the second feeding mechanism; and a discharge mechanism installed behind the punching mechanism. The annealing tube bending and punching integrated machine is reasonably designed and can realize automatic feeding, annealing, bending, punching and unloading of copper tubes, with a high degree of automation, good production continuity, high station integration and high production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of copper tube processing equipment, and in particular to an annealing tube bending and punching integrated machine. Background Art

[0002] Annealing is a metal heat treatment process that refers to slowly heating the metal to a certain temperature, keeping it for a sufficient time, and then cooling it at an appropriate speed. The purpose is to reduce hardness, improve machinability, eliminate residual stress, stabilize size, reduce deformation and crack tendency; refine grains, adjust structure, and eliminate structural defects.

[0003] During the production process of copper tubes, copper tubes are prone to work hardening, which will increase the resistivity of the conductor, deteriorate the conductivity, and especially reduce the plasticity of the metal. In order to make the copper tube meet the use requirements or restore the plasticity to continue cold deformation processing, annealing treatment is required.

[0004] In the existing processing technology, the annealing, bending and stamping of copper tubes are all processed independently, that is, one annealing equipment, one person and one machine are operated. One cylinder push pipe bending machine, the cylinder push bending is affected by the unstable air source, and the product image of the bent pipe is different. Hydraulic stamping equipment, one person and one machine are operated. This processing method is not continuous between each process, and each process needs to be transported between each process, which has a large workload and poor continuity. In addition, the equipment cost and labor cost are high, which needs to be improved. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes an annealing, bending and stamping integrated machine, which can realize automatic loading, annealing, bending, stamping and unloading of copper tubes, with high workstation integration and high production efficiency.

[0006] To realize the above technical scheme, the present invention provides an annealing pipe bending and stamping integrated machine, comprising: a frame; a blanking hopper installed on the frame; an annealing mechanism installed at the rear side of the bottom of the blanking hopper, the annealing mechanism comprising an annealing frame, at least two resistance rods vertically downwardly arranged are installed on the annealing frame, a positioning cylinder is installed on one side of the resistance rod, a positioning fixture is installed on the telescopic shaft of the positioning cylinder, a vertically upwardly arranged ejecting cylinder is correspondingly installed below the positioning fixture, and a workpiece limiting plate is installed on the telescopic shaft of the ejecting cylinder; a first feeding mechanism installed behind the annealing mechanism; a positioning and centering mechanism installed below the first feeding mechanism; A pushing and bending mechanism is installed in front of the centering mechanism, the pushing and bending mechanism includes a pushing and bending guide rail arranged along the longitudinal direction of the frame, a pushing and bending slider is installed on the pushing and bending guide rail, a pushing and bending cylinder is installed on the rear side of the pushing and bending slider, and the telescopic shaft of the pushing and bending cylinder is fixedly connected to the pushing and bending slider, a pushing and bending top block is installed on the pushing and bending slider, a pushing and bending clamping block is installed in front of the pushing and bending top block, a pushing and bending gap is arranged in the middle of the pushing and bending clamping block, the pushing and bending gap is arranged opposite to the pushing and bending top block, and pushing and bending guide wheels are symmetrically arranged at the entrance of the pushing and bending gap; a second feeding mechanism is installed behind the pushing and bending mechanism; a stamping mechanism is installed behind the second feeding mechanism; and a unloading mechanism is installed behind the stamping mechanism.

[0007] In the above technical scheme, in the actual operation process, it is only necessary to place the cut copper tube in the blanking hopper, and the copper tube that needs to be post-processed is transported to the workpiece limiting plate in the annealing mechanism through the blanking hopper, and then the ejection cylinder pushes the workpiece limiting plate to move upward to drive the copper tube to move upward and contact the bottom of the resistance rod installed on the annealing rack, and at the same time, the positioning cylinder pushes the positioning fixture downward and cooperates with the workpiece limiting plate to fix the copper tube, and then the resistance rod is energized to heat the copper tube, and then the power is stopped, and the copper tube is slowly cooled and annealed. After the process is completed, the ejector cylinder shrinks, and the first feeding mechanism transports the annealed copper tube to the front side of the push-bending mechanism. Then, after the copper tube is centered by the centering mechanism, the push-bending cylinder in the push-bending mechanism pushes the push-bending ejector block to push the copper tube placed horizontally in front of the push-bending mechanism into the push-bending gap set in the middle of the push-bending clamp block, and penetrates backward, so that the copper tube is folded in half from the middle. Since the push-bending guide wheels are symmetrically arranged at the entrance of the push-bending gap, the copper tube can be bent more rounded during the push-bending process to avoid scratches on the copper tube surface. After the copper tube is pushed and folded, the second feeding mechanism transports the folded copper tube to the stamping mechanism for stamping, and finally the copper tube after stamping is taken out by the unloading mechanism for unloading.

[0008] Preferably, the blanking hopper includes a blanking hopper frame, blanking guide rails, side plates and guide plates, wherein the blanking guide rails are installed on the blanking hopper frame obliquely downward, the side plates are installed on the blanking hopper frame and are located outside the blanking guide rails, and the guide plates are installed at the bottom of the blanking guide rails and extend above the workpiece stop plate of the annealing mechanism. In the actual production process, the copper tubes cut in the previous process are dropped downward from the blanking guide rails and rolled into the grooves set in the workpiece stop plate in the annealing mechanism through the guiding action of the guide plates.

[0009] Preferably, a V-shaped positioning block is also installed on one side of the workpiece limit plate of the annealing mechanism, and the V-shaped groove on the V-shaped positioning block has the same depth as the groove set on the surface of the workpiece limit plate. When the copper tube rolls into the groove set on the workpiece limit plate in the annealing mechanism under the guidance of the guide plate, it also rolls into the V-shaped groove on the V-shaped positioning block to achieve a good positioning effect.

[0010] Preferably, the first feeding mechanism includes two guide rail mounting plates arranged side by side and spaced along the longitudinal direction of the frame, one end of the guide rail mounting plate extends to the annealing frame, a first feeding guide rail is installed on each guide rail mounting plate, a first pneumatic slider is installed on the first feeding guide rail, a cylinder mounting plate is installed on the first pneumatic slider, a cylinder is fixed vertically downward on the cylinder mounting plate, and a mechanical gripper is fixed vertically downward on the telescopic shaft of the cylinder. In the actual production process, when the copper tube completes the annealing process, the cylinder drives the mechanical gripper to move downward, and the annealed copper tube is clamped by the mechanical gripper, and then the cylinder is reset, the first pneumatic slider moves along the first feeding guide rail to the front side of the push-bending mechanism, and then the cylinder drives the mechanical gripper downward again, and places the copper tube on the workpiece support in front of the push-bending clamp, and then the first pneumatic slider moves again and moves and resets to one side of the annealing mechanism.

[0011] Preferably, the alignment and centering mechanism includes an adjusting conveyor belt, a transverse plate, a centering guide rail, a centering pneumatic slider, a bracket, a limit rod, and a workpiece support. The transverse plate is fixed on the adjusting conveyor belt in the transverse direction, and two symmetrically arranged centering guide rails are respectively installed on the left and right ends of the transverse plate. The centering pneumatic slider is installed on the centering guide rail, the bracket is fixed on the centering pneumatic slider in the longitudinal direction, the limit rod is fixed on the front end of the bracket in the transverse direction, and the workpiece support is installed in front of the bending clamp in the bending mechanism. In the actual working process, the adjusting conveyor belt can adjust the left and right positions of the transverse plate as a whole. When the copper tube is placed on the workpiece support in front of the bending clamp, the centering pneumatic slider drives the bracket and the limit rod to move inward at the same time, and the limit rods on the left and right sides act simultaneously to push the two ends of the copper tube inward to achieve centering. After the copper tube is centered, the centering pneumatic slider drives the limit rod to reset.

[0012] Preferably, the second feeding mechanism includes a second feeding guide rail arranged along the longitudinal direction of the frame, a second pneumatic slider is mounted on the second feeding guide rail, and a feeding clamp is mounted on the second pneumatic slider. When the copper tube is pushed and bent in half, the second pneumatic slider drives the feeding clamp to move to the copper tube, and after the feeding clamp clamps the copper tube, it moves to the stamping mechanism and places the copper tube on the stamping seat.

[0013] Preferably, the stamping mechanism includes a stamping seat mounted on a frame, a stamping frame is mounted above the stamping seat, and a stamping cylinder is fixed vertically downward on the stamping frame and arranged directly opposite the stamping seat. In actual operation, when the copper tube is placed on the stamping seat, the stamping cylinder moves downward, and the stamping operation on the copper tube head is achieved through the cooperation between the stamping head mounted on the stamping cylinder and the stamping seat.

[0014] Preferably, the unloading mechanism comprises an unloading guide rail, an unloading pneumatic slider and an unloading gripper, wherein the unloading guide rail is arranged at the rear of the stamping mechanism along the longitudinal direction of the frame, the unloading pneumatic slider is mounted on the unloading guide rail, and the unloading gripper is mounted on the unloading pneumatic slider. In the actual operation process, the unloading pneumatic slider drives the unloading gripper to move to the stamping seat, and the stamped copper tube is clamped by the unloading gripper, and then the unloading pneumatic slider drives the unloading gripper to move backward to remove the copper tube from the stamping seat.

[0015] Preferably, a discharge slide is provided at the rear of the frame, and a discharge gripper in the discharge mechanism moves the stamped copper tube out of the stamping seat and places it on the discharge slide for unloading.

[0016] The beneficial effects of the annealing pipe bending and punching integrated machine provided by the present invention are:

[0017] 1) This annealing, bending and punching integrated machine is reasonably designed and can realize automatic feeding, annealing, bending, punching and unloading of copper tubes. It has high automation, good production continuity, high station integration and high production efficiency.

[0018] 2) This annealing pipe bending and stamping machine adopts the method of online continuous annealing by resistance, which ensures uniform annealing and high quality of pipes;

[0019] 3) The push-bending mechanism of the annealing tube bending and stamping machine adopts a cylinder push-bending method to realize the folding and bending of the copper tube, and push-bending guide wheels are symmetrically arranged at the entrance of the push-bending gap, which can make the copper tube bend more rounded during the push-bending process and avoid scratches on the surface of the copper tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure Ⅰ .

[0021] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure II .

[0022] Figure 3 It is a side view of the present invention.

[0023] Figure 4 It is a schematic diagram of the enlarged local structure of the present invention.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the push-bending mechanism in the present invention.

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the annealing mechanism in the present invention.

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the centering machine in the present invention.

[0027] In the figure: 1. frame; 2. blanking hopper; 21. blanking hopper frame; 22. blanking guide rail; 23. side plate; 24. guide plate; 3. annealing mechanism; 31. annealing frame; 32. resistor rod; 33. positioning cylinder; 34. positioning fixture; 35. ejector cylinder; 36. workpiece limit plate; 37. V-shaped positioning block; 4. first feeding mechanism; 41. guide rail mounting plate; 42. first feeding guide rail; 43. first pneumatic slide block; 44. cylinder mounting plate; 45. cylinder; 46. mechanical gripper; 5. centering mechanism; 51. adjusting conveyor belt; 52. cross plate; 53. Centering guide rail; 54. Centering pneumatic slider; 55. Bracket; 56. Limit rod; 57. Workpiece support; 6. Push-bending mechanism; 61. Push-bending cylinder; 62. Push-bending guide rail; 63. Push-bending slider; 64. Push-bending top block; 65. Push-bending clamp block; 66. Push-bending guide wheel; 7. Second feeding mechanism; 71. Second pneumatic slider; 72. Feeding clamp; 8. Stamping mechanism; 81. Stamping machine frame; 82. Stamping cylinder; 83. Stamping seat; 9. Unloading mechanism; 91. Unloading guide rail; 92. Unloading pneumatic slider; 93. Unloading clamp; 10. Unloading slideway. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 persons in the art without creative work are within the scope of protection of the present invention.

[0029] Embodiment: An annealing, bending and punching machine.

[0030] Reference Figures 1 to 7 As shown, an annealing tube bending and punching machine includes:

[0031] Rack 1;

[0032] A blanking hopper 2 is installed on the frame 1, and the blanking hopper 2 includes a blanking hopper frame 21, a blanking guide rail 22, a side plate 23 and a guide plate 24, wherein the blanking guide rail 22 is installed on the blanking hopper frame 21 obliquely downward, the side plate 23 is installed on the blanking hopper frame 21 and is located on the outside of the blanking guide rail 22, and the guide plate 24 is installed at the bottom of the blanking guide rail 22 and extends to the top of the workpiece stop plate 36 of the annealing mechanism 3. In the actual production process, the copper tube cut in the previous process is dropped downward from the blanking guide rail 22, and rolled into the groove set in the workpiece stop plate 36 in the annealing mechanism 3 through the guiding effect of the guide plate 24;

[0033] An annealing mechanism 3 is installed at the rear side of the bottom of the blanking hopper 2, and the annealing mechanism 3 includes an annealing frame 31, on which two resistance rods 32 arranged vertically downward are installed, and a positioning cylinder 33 is installed on one side of the resistance rod 32, and a positioning fixture 34 is installed on the telescopic shaft of the positioning cylinder 33, and a vertically upward ejecting cylinder 35 is installed correspondingly below the positioning fixture 34, and a workpiece limiting plate 36 is installed on the telescopic shaft of the ejecting cylinder 35, and a V-shaped positioning block 37 is also installed on one side of the workpiece limiting plate 36, and the V-shaped groove on the V-shaped positioning block 37 has the same depth as the groove arranged on the surface of the workpiece limiting plate 36. When the copper tube rolls down to the workpiece limiting plate in the annealing mechanism 3 under the guidance of the guide plate 24, the copper tube is moved to the workpiece limiting plate 36. The plate 36 is also rolled into the V-shaped groove on the V-shaped positioning block 37 to achieve a good positioning effect. In the actual production process, the copper tube that needs to be post-processed is transported to the workpiece limiting plate 36 in the annealing mechanism 3, and then the ejection cylinder 35 pushes the workpiece limiting plate 36 to move upward to drive the copper tube to move upward and contact the bottom of the resistor rod 32 installed on the annealing rack 31. At the same time, the positioning cylinder 33 pushes the positioning fixture 34 downward and cooperates with the workpiece limiting plate 36 to fix the copper tube. Then the resistor rod 32 is energized to heat the copper tube, and then the power is stopped. The copper tube is slowly cooled and annealed, and the annealing process is completed. By adopting the method of online continuous annealing of the resistor, the copper tube is annealed evenly and the tube quality is high.

[0034] The first feeding mechanism 4 is installed behind the annealing mechanism 3, and the first feeding mechanism 4 includes two guide rail mounting plates 41 arranged side by side and spaced along the longitudinal direction of the frame, one end of the guide rail mounting plate 41 extends to the annealing frame 31, and each guide rail mounting plate 41 is installed with a first feeding guide rail 42, a first pneumatic slider 43 is installed on the first feeding guide rail 42, a cylinder mounting plate 44 is installed on the first pneumatic slider 43, a cylinder 45 is fixed vertically downward on the cylinder mounting plate 44, and a mechanical gripper 46 is fixed vertically downward on the cylinder 4 5, in the actual production process, when the copper tube completes the annealing process, the cylinder 45 drives the mechanical gripper 46 to move downward, and the annealed copper tube is clamped by the mechanical gripper 46, and then the cylinder 45 is reset, and the first pneumatic slide 43 moves along the first feeding guide rail 42 to the front side of the push-bending mechanism 6, and then the cylinder 45 drives the mechanical gripper 46 to move downward again, and places the copper tube on the workpiece support 57 in front of the push-bending clamp block 65, and then the first pneumatic slide 43 moves again, and moves and resets to the side of the annealing mechanism 3;

[0035] The alignment and centering mechanism 5 is installed below the first feeding mechanism 4, and the alignment and centering mechanism 5 includes an adjusting conveyor belt 51, a transverse plate 52, a centering guide rail 53, a centering pneumatic slider 54, a bracket 55, a limit rod 56, and a workpiece support 57. The transverse plate 52 is fixed on the adjusting conveyor belt 51 in the transverse direction, and two symmetrically arranged centering guide rails 53 are respectively installed at the left and right ends of the transverse plate 52. The centering pneumatic slider 54 is installed on the centering guide rail 53, the bracket 55 is fixed on the centering pneumatic slider 54 in the longitudinal direction, and the limit rod 56 is fixed in the transverse direction. The workpiece support 57 is fixed at the front end of the bracket 55, and is installed in front of the bending clamp 65 in the bending mechanism 6. In the actual working process, the conveyor belt 51 can be adjusted to adjust the left and right positions of the horizontal plate 52 as a whole. When the copper tube is placed on the workpiece support 57 in front of the bending clamp 65, the centering pneumatic slider 54 drives the bracket 55 and the limit rod 56 to move inward at the same time, and the limit rods 56 on the left and right sides act at the same time to push the two ends of the copper tube inward to achieve centering positioning. After the copper tube is centered, the centering pneumatic slider 54 drives the limit rod 56 to reset;

[0036] The push-bending mechanism 6 is installed in front of the centering mechanism 5, and the push-bending mechanism 6 includes a push-bending guide rail 62 arranged longitudinally along the frame 1, a push-bending slider 63 is installed on the push-bending guide rail 62, a push-bending cylinder 61 is installed on the rear side of the push-bending slider 63, and the telescopic shaft of the push-bending cylinder 61 is fixedly connected to the push-bending slider 63, a push-bending top block 64 is installed on the push-bending slider 63, and a push-bending clamping block 65 is installed in front of the push-bending top block 64. A push-bending gap is provided in the middle of the push-bending clamping block 65, and the push-bending gap is arranged opposite to the push-bending top block 64. The push-bending guide wheels 66 are symmetrically arranged at the entrance of the push-bending gap. In the actual processing process, after the centering mechanism 5 centers the copper tube, the push-bending cylinder 61 in the push-bending mechanism 6 pushes the push-bending top block 64 to push the copper tube placed horizontally on the front side of the push-bending mechanism 6 into the push-bending gap set in the middle of the push-bending clamp 65, and penetrates backward, so that the copper tube is folded in half from the middle. Since the push-bending guide wheels 66 are symmetrically arranged at the entrance of the push-bending gap, the copper tube can be bent more roundly during the push-bending process to avoid scratches on the surface of the copper tube.

[0037] A second feeding mechanism 7 is installed behind the push-bending mechanism 6, and the second feeding mechanism 7 includes a second feeding guide rail arranged longitudinally along the frame 1, a second pneumatic slider 71 is installed on the second feeding guide rail, and a feeding clamp 72 is installed on the second pneumatic slider 71. When the copper tube is pushed and bent in half, the second pneumatic slider 71 drives the feeding clamp 72 to move to the copper tube, and after the copper tube is clamped by the feeding clamp 72, it moves to the stamping mechanism 8 and places the copper tube on the stamping seat 83;

[0038] The stamping mechanism 8 is installed behind the second feeding mechanism 7, and the stamping mechanism 8 includes a stamping seat 83 installed on the frame 1, a stamping frame 81 is installed above the stamping seat 83, and a stamping cylinder 82 is fixed vertically downward on the stamping frame 81 and arranged opposite to the stamping seat 83. In actual operation, when the copper tube is placed on the stamping seat 83, the stamping cylinder 82 moves downward, and the stamping operation on the copper tube head is realized by the cooperation between the stamping head installed on the stamping cylinder 82 and the stamping seat 83.

[0039] And a discharge mechanism 9 installed at the rear of the stamping mechanism 8, the discharge mechanism 9 includes a discharge guide rail 91, a discharge pneumatic slider 92 and a discharge clamp 93. The discharge guide rail 91 is arranged at the rear of the stamping mechanism 8 along the longitudinal direction of the frame 1, the discharge pneumatic slider 92 is installed on the discharge guide rail 91, and the discharge clamp 93 is installed on the discharge pneumatic slider 92. During the actual operation, the discharge pneumatic slider 92 drives the discharge clamp 93 to move to the stamping seat 83, and the stamped copper tube is clamped by the discharge clamp 93, and then the discharge pneumatic slider 92 drives the discharge clamp 93 to move backward to move the copper tube out of the stamping seat 83. A discharge slide 10 is arranged at the rear of the frame 1, and the discharge clamp 93 in the discharge mechanism 9 moves the stamped copper tube out of the stamping seat 83 and places it on the discharge slide 10 for unloading.

[0040] The annealing, bending, and punching integrated machine is reasonably designed and can realize automatic feeding, annealing, bending, punching, and unloading of copper tubes. It has a high degree of automation, good production continuity, and high production efficiency. In the actual operation process, it is only necessary to place the cut copper tubes in the blanking hopper 2, and the copper tubes that need to be post-processed are transported to the workpiece limit plate 36 in the annealing mechanism 3 through the blanking guide rail 22 and the guide plate 24 in the blanking hopper 2. Then the ejection cylinder 35 pushes the workpiece limit plate 36 to move upward to drive the copper tube to move upward and contact the bottom of the resistance rod 32 installed on the annealing frame 31. At the same time, the positioning cylinder 33 pushes the positioning fixture 34 downward, and cooperates with the workpiece limit plate 36 to fix the copper tube. Then the resistance rod 32 is energized to heat the copper tube, and then the power is stopped. The copper tube is slowly cooled and annealed. The annealing process After completion, the ejecting cylinder 35 contracts, and the first feeding mechanism 4 conveys the annealed copper tube to the front side of the pushing and bending mechanism 6. Then, the copper tube is centered by the centering mechanism 5, and the pushing and bending cylinder 61 in the pushing and bending mechanism 6 pushes the pushing and bending ejector block 64 to push the copper tube placed horizontally on the front side of the pushing and bending mechanism 6 into the pushing and bending gap set in the middle of the pushing and bending clamp 65, and penetrates backward, so that the copper tube is folded in half from the middle. After the copper tube is pushed and folded in half, the second feeding mechanism 7 conveys the folded copper tube to the stamping mechanism 8 for stamping, and finally the copper tube after stamping is taken out by the unloading mechanism 9 for unloading.

[0041] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. An annealing pipe bending and stamping machine, characterized in that include: frame; A drop hopper mounted on the frame; An annealing mechanism is installed at the rear side of the bottom of the blanking hopper, the annealing mechanism includes an annealing frame, at least two resistance rods arranged vertically downward are installed on the annealing frame, a positioning cylinder is installed on one side of the resistance rod, a positioning fixture is installed on the telescopic shaft of the positioning cylinder, a vertically upward ejecting cylinder is installed correspondingly below the positioning fixture, and a workpiece limiting plate is installed on the telescopic shaft of the ejecting cylinder; A first feeding mechanism installed behind the annealing mechanism; A centering mechanism installed below the first feeding mechanism; A push-bending mechanism is installed in front of the centering mechanism, the push-bending mechanism includes a push-bending guide rail arranged along the longitudinal direction of the frame, a push-bending slider is installed on the push-bending guide rail, a push-bending oil cylinder is installed on the rear side of the push-bending slider, and the telescopic shaft of the push-bending oil cylinder is fixedly connected to the push-bending slider, a push-bending top block is installed on the push-bending slider, a push-bending clamping block is installed in front of the push-bending top block, a push-bending gap is arranged in the middle of the push-bending clamping block, the push-bending gap is arranged opposite to the push-bending top block, and push-bending guide wheels are symmetrically arranged at the entrance of the push-bending gap; A second feeding mechanism installed behind the push-bending mechanism; a punching mechanism mounted behind the second feeding mechanism; and The unloading mechanism installed behind the punching mechanism, The blanking hopper comprises a blanking hopper frame, a blanking guide rail, a side plate and a guide plate, wherein the blanking guide rail is installed on the blanking hopper frame at an angle downward, the side plate is installed on the blanking hopper frame and is located outside the blanking guide rail, and the guide plate is installed at the bottom of the blanking guide rail and extends above the workpiece limiting plate of the annealing mechanism. A V-shaped positioning block is also installed on one side of the workpiece limiting plate of the annealing mechanism. The first feeding mechanism comprises two guide rail mounting plates arranged side by side and spaced along the longitudinal direction of the frame, one end of the guide rail mounting plate extends to the annealing frame, each guide rail mounting plate is mounted with a first feeding guide rail, a first pneumatic slider is mounted on the first feeding guide rail, a cylinder mounting plate is mounted on the first pneumatic slider, a cylinder is vertically fixed downward on the cylinder mounting plate, and a mechanical gripper is vertically fixed downward on the telescopic shaft of the cylinder. The alignment and centering mechanism comprises an adjusting conveyor belt, a transverse plate, a centering guide rail, a centering pneumatic slider, a bracket, a limit rod, and a workpiece support. The transverse plate is fixed on the adjusting conveyor belt in the transverse direction, two symmetrically arranged centering guide rails are respectively installed at the left and right ends of the transverse plate, the centering pneumatic slider is installed on the centering guide rail, the bracket is fixed on the centering pneumatic slider in the longitudinal direction, the limit rod is fixed on the front end of the bracket in the transverse direction, and the workpiece support is installed in front of the push-bending clamp in the push-bending mechanism. The second feeding mechanism comprises a second feeding guide rail arranged along the longitudinal direction of the frame, a second pneumatic slide block is mounted on the second feeding guide rail, and a feeding gripper is mounted on the second pneumatic slide block. The punching mechanism comprises a punching seat mounted on a frame, a punching frame is mounted above the punching seat, and a punching oil cylinder is fixed vertically downward on the punching frame and arranged directly opposite to the punching seat. The unloading mechanism comprises an unloading guide rail, an unloading pneumatic slider and an unloading gripper. The unloading guide rail is arranged at the rear of the stamping mechanism along the longitudinal direction of the frame, the unloading pneumatic slider is installed on the unloading guide rail, and the unloading gripper is installed on the unloading pneumatic slider. A discharging slideway is arranged at the rear of the frame.

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