Leisure seat production equipment and production process thereof

Abstract

The application discloses a kind of leisure seat production equipment, including pipe bender;The pipe bender is equipped with the clamping assembly for clamping after bending framework;The clamping assembly includes clamping frame and several clamping blocks, the groove body that is adapted to the framework contour is equipped on the clamping block;Limiting piece for limiting framework is equipped on the clamping block, and the limiting piece includes limiting plate and several limiting rods slidingly penetrating groove body;The limiting plate is equipped with guide block, and the pipe bender includes table plate, the locating block that is matched with guide block is equipped on the table plate, the guide groove that is matched with guide block is equipped on the locating block, and reset spring is equipped between the limiting plate and clamping block;The application provides a kind of production equipment of steel seat framework, by setting clamping assembly on pipe bender, the framework after bending is immediately clamped and fixed, guarantee the precision of the framework bending, simultaneously by being transported to welding unit simultaneously with framework, the precision when transporting is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of seat manufacturing equipment technology, and in particular to a leisure seat production equipment and its production process. Background Technology

[0002] Steel lounge chairs are a common type of rest facility. Their frames are usually symmetrically arranged. They are made by bending small-diameter steel pipes and then welding the two frames together with straight pipes to form a whole chair frame. After a series of processes such as painting and installing cover parts, they can be made into finished chairs.

[0003] The steel frame of the seat needs to be bent using a pipe bending machine, and then the bent frame is transported to a welding fixture for welding. However, this production process still has the following drawbacks and shortcomings:

[0004] 1. Small-diameter steel pipes are prone to slight rebound deformation after being bent on a pipe bending machine, which can lead to deviations in the support angles of the frame on both sides after welding. The frame is also prone to deformation during transportation, ultimately causing the chair legs to become unstable, requiring subsequent correction or repair. This not only affects the quality of the chair but also greatly reduces the chair's production efficiency.

[0005] 2. During the frame welding process, the frame needs to be clamped on the welding fixture. The time spent on clamping and disassembling accounts for a large proportion, thus affecting the welding efficiency of a single chair frame. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing a leisure chair production equipment and its production process.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a leisure chair production equipment, including a tube bending machine.

[0008] In the above scheme, preferably, the pipe bending machine is provided with a clamping component for clamping the bent skeleton;

[0009] The clamping assembly includes a clamping frame and a plurality of clamping blocks disposed on the clamping frame and adapted to the bent skeleton. The clamping blocks are provided with grooves adapted to the shape of the skeleton.

[0010] The clamping block is provided with a limiting component for limiting the skeleton, the limiting component including a limiting plate and a plurality of limiting rods that slide through the groove;

[0011] The limiting plate is provided with a guide block, the pipe bending machine includes a table, the table is provided with a positioning block that cooperates with the guide block, the positioning block is provided with a guide groove that cooperates with the guide block, and a return spring is provided between the limiting plate and the clamping block.

[0012] After the skeleton is bent by the pipe bending machine, the clamping assembly slides upward, causing the skeleton to fall into the groove of the clamping block. Then, the guide block disengages from the guide groove, and the limiting rod passes horizontally through the opening of the groove under the action of the return spring, thus fixing and limiting the skeleton.

[0013] In the above scheme, preferably, the guide block is fixedly connected to the clamping block by a connecting pin.

[0014] In the above scheme, preferably, the platform is provided with irregularly shaped holes for the clamping components to slide.

[0015] In the above scheme, preferably, the pipe bending machine includes a collection rack for fixing and placing clamping components, a plurality of clamping components are stacked on the collection rack, a guide rod is provided on the collection rack, and a guide hole is provided on the clamping rack to cooperate with the guide rod.

[0016] In the above scheme, preferably, the pipe bending machine includes a fixing seat for fixing the collection rack, the fixing seat is provided with a linear module for driving the clamping assembly to move upward, the linear module is provided with a drive plate, and the drive plate is provided with a slot that cooperates with the clamping rack;

[0017] The mounting base is provided with a disassembly slot for assembling and disassembling the collection rack.

[0018] In the above scheme, preferably, a welding unit is included, and a fixed seat and a collection rack are symmetrically provided on both sides of the welding unit. After clamping the skeleton, the clamping assembly is taken out from the pipe bending machine and placed at the end of the guide rod of the collection rack.

[0019] The fixed base is provided with a baffle that restricts the sliding of the clamping component. The baffle is raised and lowered by a lifting cylinder, thereby realizing the sliding and positioning of the clamping component.

[0020] In the above scheme, preferably, the welding unit is symmetrically provided with unlocking components for unlocking the upper limit rod of the clamping block of the clamping component. The unlocking components include a driving cylinder and an unlocking frame provided on the driving cylinder. The unlocking frame is provided with a positioning block adapted to the guide block.

[0021] In the above scheme, preferably, the guide groove includes a locking section, a transition section, and an unlocking section;

[0022] The guide block slides into the locking section, transition section and unlocking section in sequence in the pipe bending machine. After finally disengaging from the unlocking section, the limit rod horizontal slot body locks the skeleton onto the clamping assembly.

[0023] The unlocking frame slides in sequence to engage the locking section, transition section and unlocking section with the guide block, and finally the limiting rod slides out of the groove body to complete the unlocking between the clamping block and the skeleton.

[0024] In the above scheme, preferably, the unlocking frame is provided with a top sleeve that cooperates with the clamping frame.

[0025] In the above scheme, a preferred manufacturing process for a leisure chair production equipment is as follows:

[0026] S1: Place the steel pipe to be bent in the pipe bending machine, and then bend it into a frame;

[0027] S2: Start the linear module to lift the clamping component. During the sliding process of the clamping component, the guide block of the clamping block on it cooperates with the guide groove, so that the limit rod slides away from the groove, thereby causing the bent skeleton to fall into the groove.

[0028] S3: After the clamping component continues to slide upward, the guide block slides out of the guide groove and disengages from it. The limit rod is reset under the action of the reset spring and then passes horizontally through the upper opening of the guide groove, so that the skeleton is positioned by the clamping component.

[0029] S4: Place the two sets of skeletons held by the clamping components into the symmetrical collection rack on the welding unit. The clamping components are limited by the baffle. At this time, the skeletons on both sides are welded together through the straight tube.

[0030] S5: After welding is completed, start the drive cylinder to drive the unlocking frame to slide laterally, so that the guide groove on the positioning block cooperates with the guide block on the clamping assembly. During the sliding process, the guide groove drives the guide block to slide through the transition section, thereby causing the limit rod to slide away from the groove body and opening the groove body.

[0031] S6: Then the top sleeve abuts against the clamping frame, and at the same time the baffle is driven to slide downward by the lifting cylinder, so that the clamping component slides on the guide rod, completing the separation of the clamping component from the welded skeleton;

[0032] S7: After the clamping assembly slides on the guide rod of the welding unit, it is collected by the collection rack. After the collection rack collects a certain number of clamping units, it is removed from the fixed seat and installed on the fixed seat of the pipe bending machine, thus completing the recycling of the clamping assembly and the collection rack.

[0033] The beneficial effects of the present invention are as follows: The present invention provides a production equipment for steel seat frames. By setting a clamping component on the tube bending machine, the bent frame is immediately clamped and fixed to ensure the bending accuracy of the frame. At the same time, by transporting the frame synchronously to the welding unit, the accuracy during transportation is ensured.

[0034] In addition, a collection rack and unlocking assembly for collecting clamping components are installed on the welding unit, which improves the efficiency of welding clamping and unlocking, and quickly collects the clamping components to facilitate the movement of parts, greatly improving the production efficiency of chair frames. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the pipe bending machine of the present invention.

[0036] Figure 2 This is a cross-sectional view of the clamping component on the pipe bending machine of the present invention.

[0037] Figure 3 This is a partial enlarged structural diagram of point A in the present invention.

[0038] Figure 4 This is a three-dimensional structural diagram of the clamping component of the present invention.

[0039] Figure 5 This is a schematic diagram of the three-dimensional structure of the clamping block and positioning block of the present invention.

[0040] Figure 6 This is a schematic diagram of the structure of the collection rack and the fixing base of the present invention.

[0041] Figure 7 This is a three-dimensional structural diagram of the welding unit of the present invention.

[0042] Figure 8 This is a partial cross-sectional view of the clamping component in the welding unit of the present invention. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figures 1-8 A leisure chair production equipment includes a pipe bending machine 1 and a welding unit 5. The pipe bending machine 1 is used to bend steel pipes to form the frame of the chair. In this embodiment, the steel pipes bent by the pipe bending machine 1 can be used to form the chair leg frame of the chair.

[0044] The chair body is formed by welding the two side frame legs of the seat together with straight pipes. Therefore, in this embodiment, a welding unit 5 is provided to connect and weld the two side frames. That is, two sets of steel pipes are bent by a pipe bending machine 1 to form a symmetrical frame. Then, the frame is placed on the welding unit 5 and the connecting straight pipe is welded to it to form an integral frame leg.

[0045] The pipe bending machine 1 includes a platform 2, on which a mechanism for bending steel pipes is provided. This is existing technology for pipe bending machines and will not be described in detail here. After the steel pipe is placed in the bending mechanism, the steel pipe can be bent. The pipe bending machine 1 is provided with a clamping assembly for immediately clamping the bent skeleton. The clamping assembly includes a clamping frame 101 and a plurality of clamping blocks 102 adapted to the bent skeleton on the clamping frame 101. The clamping frame 101 is fixedly connected to the clamping blocks 102 through a connecting frame. The position and angle of the clamping blocks 102 can be adaptively adjusted according to the angle of the skeleton after bending by the pipe bending machine 1.

[0046] The clamping block 102 is provided with a groove 103 that matches the shape of the skeleton. Specifically, the diameter or width of the groove 103 matches the diameter of the steel pipe used to manufacture the skeleton. This means that the pipes in all directions of the bent skeleton can fall into the groove 103 and be positioned planarly. Figure 1 As shown, taking the setting of 3 clamping blocks 102 as an example, the clamping blocks 102 on both sides cooperate with the chair legs of the frame to clamp, while the top clamping block 102 clamps with the horizontal tube of the frame, thereby realizing the function of 3-point planar clamping.

[0047] To enable the clamping components to cooperate with the bent skeleton at the appropriate time, that is, to allow the clamping components to move and cooperate with the skeleton after the skeleton is bent, the pipe bending machine 1 is provided with a collection rack 3 for stacking the clamping components. The bottom of the pipe bending machine 1 is provided with a fixing seat 4 that cooperates with the collection rack 3. The fixing seat 4 is provided with a disassembly groove 404 for disassembling and assembling the collection rack 3. Initially, the bottom plate of the collection rack 3 is stuck in the disassembly groove 404 of the fixing seat 4. The collection rack 3 is provided with a guide rod 301. The clamping components are sleeved and stacked on the guide rod 301 through the guide hole 110 on the clamping frame 101. Therefore, multiple clamping components can be stacked on the guide rod 301 to adapt to the efficiency of the pipe bending machine 1 in batch production.

[0048] The fixed base 4 is provided with a linear module 401 that drives the clamping components to move upward. The linear module 401 is provided with a drive plate 402. The drive plate 402 is provided with a slot 403 that cooperates with the guide sleeve in the middle of the clamping frame 101. The drive plate 402 is set on the slider of the linear module 401. Initially, the drive plate 402 cooperates with the guide sleeve of the bottom clamping component through the slot 403. When the linear module 401 drives the slider to slide, it can move the stacked clamping components upward, so that the top clamping component cooperates with the bent skeleton. Preferably, the platform 2 is provided with irregular holes 3 for the clamping components to slide through.

[0049] To ensure that the vertical direction of the skeleton relative to the clamping component is also positioned after the clamping assembly moves upward and engages with the skeleton, the clamping block 102 is provided with a limiting member 104 to limit the skeleton. The limiting member 104 includes a limiting plate 105 and a plurality of limiting rods 106 that slide through the groove 103. In this embodiment, two sets of limiting rods 106 are provided and are laterally sliding through the groove 103. Figures 1-3 As shown, one end face of the limiting plate 105 is vertically fixed to the limiting rod 106, and the limiting rod 106 passes through the clamping block 102. The other end face is fixed with a guide block 107 by a connecting pin 109.

[0050] A return spring 108 is provided between the end face of the limiting plate 105 near the limiting rod 106 and the clamping block 102. The return spring 108 is a tension spring, so that the limiting rod 106 is held above the groove 103 by the tension of the return spring 108 in the initial state. That is, initially, the groove opening above the groove 103 is closed, and the skeleton is difficult to fall into the groove 103.

[0051] To ensure that the skeleton engages with the groove 103 via upward displacement of the clamping assembly after bending by the pipe bending machine 1, this embodiment provides a positioning block 201 on the platform 2 that engages with the guide block 107. The positioning block 201 has a guide groove 202 that engages with the guide block 107. Figures 3-5 As shown, the guide groove 202 includes a locking section 2001, a transition section 2002, and an unlocking section 2003. In the pipe bending machine 1, the locking section 2001, the transition section 2002, and the unlocking section 2003 are arranged from bottom to top. The transition section 2002 is an inclined groove, and its inclination direction is upward from the side from the locking section 2001 to the unlocking section 2003 towards the side away from the guide block 107. The guide groove 202 is a slot. In the initial state of the clamping assembly, the guide block 107 can fall into the slot of the locking section 2001. Subsequently, as the clamping assembly moves upward, the guide block 107 moves along the guide groove 202. The guide spring 108 pulls the return spring 108 away from the clamping block 102, causing the limiting rod 106 to slide laterally away from the groove 103, opening the groove of the groove 103. The clamping assembly then continues to move, causing the skeleton to fall into the groove 103 and be positioned. As the clamping assembly continues to slide upwards, the guide block 107 disengages from the unlocking section 2003, i.e., disengages from the guide groove 202. The limiting rod 106 resets under the tension of the return spring 108, closing the groove of the groove 103. This limits the upward movement of the skeleton by the limiting rod 106, thus securing the entire skeleton in place.

[0052] After being bent by the pipe bending machine 1, the skeleton is fixed by the clamping assembly. The operator then moves the skeleton along with the clamping assembly to ensure that the skeleton is firmly clamped and positioned throughout the process, guaranteeing its accuracy during welding. Finally, the skeleton is moved to the welding unit 5 for welding preparation. Specifically, the welding unit 5 has symmetrically arranged fixing seats 4 and collecting racks 3 on both sides. The fixing seats 4 are installed horizontally in the welding unit 5, with their disassembly slots 404 opening upwards. The collecting racks 3 are then secured to the fixing seats 4 by the cooperation of the base plate and the disassembly slots 404, ultimately forming a... Figure 7 The state shown.

[0053] When clamped in welding unit 5, the clamping assembly is fitted onto the end of guide rod 301 through guide hole 110 on clamping frame 101. The fixed base 4 is provided with baffle 501 to restrict the sliding of the clamping assembly. That is, after the clamping assembly is fitted onto the end of guide rod 301, its end face near fixed base 4 is fixed. When the clamping assembly is fitted, the opening direction of the groove 103 is facing away from fixed base 4. The baffle 501 is raised and lowered by lifting cylinder 502. When the baffle 501 is lowered, the clamping assembly can slide along guide rod 301 towards one side of fixed base 4. Thus, the sliding and positioning of the clamping assembly is achieved by the raising and lowering of baffle 501. After the frames on both sides are clamped by the clamping assembly, the connecting pipe between the two frames is welded to complete the welding of the chair frame.

[0054] To unlock and remove the clamping assembly from the frame after welding, this embodiment provides symmetrical unlocking components in the middle of the welding unit 5 for unlocking the upper limit rod 104 of the clamping block 102. The unlocking components include a drive cylinder 503 and an unlocking bracket 504 mounted on the drive cylinder 503. The unlocking bracket 504 has a positioning block 201 adapted to the guide block 107. The positioning block 201 is horizontally positioned, with its orientation as shown in the figure. Figure 8 As shown, one end of the locking segment 2001 is located near the guide block 107. When the driving cylinder 503 drives the unlocking frame 504 to slide horizontally towards the clamping assembly, the unlocking segment 2001 on the positioning block 201 first cooperates with the guide block 107, causing the guide block 107 to enter the guide groove 202. Then the unlocking frame 504 continues to slide, and the guide block 107 enters the transition segment 2002 and the unlocking segment 2003 in sequence, causing the guide block 107 to drive the limit rod 106 to move and open the groove of the groove 103.

[0055] The unlocking frame 504 is provided with a top sleeve 505 that cooperates with the clamping frame 101. When the guide block 107 enters the unlocking section 2003, the top sleeve 505 abuts against the guide sleeve in the middle of the clamping frame 101. At the same time, the lifting cylinder 502 drives the baffle 501 to slide down. As the unlocking frame 504 continues to slide, the clamping component is pushed into the guide rod 301 for storage. At this time, the clamping component is disengaged from the welded chair frame. After the unlocking frame 504 continues to push a certain distance, the baffle 501 slides upward to reset and locks between the unlocking frame 504 and the clamping frame 101. Then the unlocking frame 504 resets, and the guide block 107 resets along the guide groove 202 to disengage from the positioning block 201, completing the disengagement of the clamping component from the unlocking frame 504. Finally, multiple clamping components are collected by the collecting rack 3 and put back into the pipe bending machine 1 for use, completing the circulation and use of the clamping components and improving production efficiency and utilization efficiency.

[0056] The manufacturing process of a leisure chair production equipment is as follows:

[0057] S1: Place the steel pipe to be bent into the pipe bending machine 1, and then bend the pipe to form a skeleton;

[0058] S2: Start the linear module 401 to lift the clamping component. During the sliding process of the clamping component, the guide block 107 of the clamping block 102 on it cooperates with the guide groove 202, so that the limiting rod 106 slides away from the groove 103, thereby causing the bent skeleton to fall into the groove 103.

[0059] S3: After the clamping component continues to slide upward, the guide block 107 slides out of the guide groove 202 and disengages from it. The limit rod 106 is reset under the action of the reset spring 108 and then passes horizontally through the upper opening of the guide groove 202, so that the skeleton is positioned by the clamping component.

[0060] S4: Place the two sets of skeletons held by the clamping components into the symmetrical collection rack 3 on the welding unit 5. The clamping components are limited by the baffle 501. At this time, the skeletons on both sides are welded together through the straight tube.

[0061] S5: After welding is completed, start the drive cylinder 503 to drive the unlocking frame 504 to slide laterally, so that the guide groove 202 on the positioning block 201 cooperates with the guide block 107 on the clamping assembly. During the sliding process, the guide groove 202 drives the guide block 107 to slide through the transition section 2002, thereby causing the limit rod 106 to slide away from the side of the groove 103, so that the opening of the groove 103 is opened.

[0062] S6: Then the top sleeve 505 abuts against the clamping frame 101, and at the same time the baffle 501 is driven to slide downward by the lifting cylinder 502, so that the clamping assembly slides on the guide rod 301, completing the separation of the clamping assembly from the welded skeleton.

[0063] S7: After the clamping assembly slides on the guide rod 301 of the welding unit, it is collected by the collection rack 3. After the collection rack 3 collects a certain number of clamping units, it is removed from the fixed seat 4 and installed on the fixed seat 4 of the pipe bending machine 1, thus completing the recycling of the clamping assembly and the collection rack 3.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A leisure chair production equipment, comprising a tube bending machine (1), characterized in that: The pipe bending machine (1) is equipped with a clamping assembly for clamping the bent skeleton; The clamping assembly includes a clamping frame (101) and a plurality of clamping blocks (102) provided on the clamping frame (101) and adapted to the bent skeleton. The clamping blocks (102) are provided with grooves (103) adapted to the shape of the skeleton. The clamping block (102) is provided with a limiting member (104) for limiting the skeleton. The limiting member (104) includes a limiting plate (105) and a plurality of limiting rods (106) that slide through the groove (103). The limiting plate (105) is provided with a guide block (107), the pipe bending machine (1) includes a table (2), the table (2) is provided with a positioning block (201) that cooperates with the guide block (107), the positioning block (201) is provided with a guide groove (202) that cooperates with the guide block (107), and a return spring (108) is provided between the limiting plate (105) and the clamping block (102). After the skeleton is bent by the pipe bending machine (1), the clamping assembly slides upward, causing the skeleton to fall into the groove (103) of the clamping block (102). Then the guide block (107) disengages from the guide groove (202), and the limiting rod (106) passes through the opening of the groove (103) laterally under the action of the return spring (108), so that the skeleton is fixed and limited.

2. The leisure chair production equipment according to claim 1, characterized in that: The guide block (107) is fixedly connected to the clamping block (102) via a connecting pin (109).

3. The leisure chair production equipment according to claim 1, characterized in that: The platform (2) is provided with irregular holes (203) for the clamping components to slide.

4. The leisure chair production equipment according to claim 1, characterized in that: The pipe bending machine (1) includes a collection rack (3) for fixing and placing clamping components. Several clamping components are stacked on the collection rack (3). The collection rack (3) is provided with a guide rod (301). The clamping frame (101) is provided with a guide hole (110) that cooperates with the guide rod (301).

5. The leisure chair production equipment according to claim 4, characterized in that: The pipe bending machine (1) includes a fixed base (4) for fixing the collection rack (3), the fixed base (4) is provided with a linear module (401) for driving the clamping assembly to move upward, the linear module (401) is provided with a drive plate (402), and the drive plate (402) is provided with a slot (403) that cooperates with the clamping rack (101). The fixed base (4) is provided with a disassembly groove (404) for disassembling and assembling the collection rack (3).

6. A leisure chair production equipment according to claim 5, comprising a welding unit (5), characterized in that: The welding unit (5) is symmetrically provided with a fixed seat (4) and a collection rack (3) on both sides. After clamping the skeleton, the clamping assembly is taken out from the pipe bending machine (1) and placed at the end of the guide rod (301) of the collection rack (3). The fixed base (4) is provided with a baffle (501) to restrict the sliding of the clamping component. The baffle (501) is lifted and slid by a lifting cylinder (502) to achieve the sliding and positioning of the clamping component.

7. The leisure chair production equipment according to claim 6, characterized in that: The welding unit (5) is symmetrically provided with an unlocking component for unlocking the upper limit rod (104) of the clamping block (102) of the clamping component. The unlocking component includes a driving cylinder (503) and an unlocking frame (504) provided on the driving cylinder (503). The unlocking frame (504) is provided with a positioning block (201) that is adapted to the guide block (107).

8. The leisure chair production equipment according to claim 7, characterized in that: The guide groove (202) includes a locking section (2001), a transition section (2002), and an unlocking section (2003). The guide block (107) slides into the locking section (2001), transition section (2002) and unlocking section (2003) in sequence in the pipe bending machine (1). After it finally disengages from the unlocking section (2003), the limiting rod (106) slides into the horizontal slot body (103) and then locks the skeleton onto the clamping assembly. The unlocking frame (504) slides in sequence to make the locking section (2001), the transition section (2002) and the unlocking section (2003) cooperate with the guide block (107), and finally the limiting rod (106) slides out of the groove (103) to complete the unlocking between the clamping block (101) and the skeleton.

9. The leisure chair production equipment according to claim 8, characterized in that: The unlocking frame (504) is provided with a top sleeve (505) that cooperates with the clamping frame (101).

10. The manufacturing process of a leisure chair production equipment according to claim 9, characterized in that: The process is as follows: S1: Place the steel pipe to be bent into the pipe bending machine (1), and then bend the pipe to form a skeleton; S2: Start the linear module (401) to lift the clamping component. During the sliding process of the clamping component, the guide block (107) of the clamping block (102) on it cooperates with the guide groove (202) to make the limit rod (106) slide away from the groove (103), so that the bent skeleton falls into the groove (103). S3: After the clamping assembly continues to slide upward, the guide block (107) slides out of the guide groove (202) and disengages from its engagement. The limit rod (106) is reset under the action of the reset spring (108) and then passes horizontally through the upper opening of the guide groove (202), so that the skeleton is positioned by the clamping assembly. S4: Place the two sets of skeletons held by the clamping components into the symmetrical collection rack (3) on the welding unit (5). The clamping components are limited by the baffle (501). At this time, the skeletons on both sides are welded together through the straight pipe. S5: After welding is completed, start the drive cylinder (503) to drive the unlocking frame (504) to slide laterally, so that the guide groove (202) on the positioning block (201) cooperates with the guide block (107) on the clamping assembly. During the sliding process, the guide groove (202) drives the guide block (107) to slide through the transition section (2002), so that the limit rod (106) slides away from the groove (103) and the opening of the groove (103) is opened. S6: Then the top sleeve (505) abuts against the clamping frame (101), and at the same time the baffle (501) is driven to slide downward by the lifting cylinder (502), so that the clamping assembly slides on the guide rod (301) to complete the separation of the clamping assembly from the welded skeleton; S7: After the clamping assembly slides on the guide rod (301) of the welding unit, it is collected by the collection rack (3). When the collection rack (3) collects a certain number of clamping units, it is removed from the fixed seat (4) and installed on the fixed seat (4) of the pipe bending machine (1), thus completing the recycling of the clamping assembly and the collection rack (3).

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