A welding device for the air duct of an airflow bed heating box

Abstract

This invention provides a welding device for the air duct of an airflow bed heating box, including a worktable. The worktable is equipped with a first support and a second support. A positioning frame driven by a servo motor is rotatably mounted on the first support. A clamping cylinder is mounted on the top of the positioning frame, facing downwards. An L-shaped clamping block is connected to the piston rod end of the clamping cylinder. A pre-installation tube for pre-installing and positioning the air duct is elastically slidably mounted on the first support. A servo electric cylinder is mounted on the second support, and a longitudinal movement component is connected to the piston rod end of the servo electric cylinder. The advantages of this invention are: the air duct can be pre-installed onto the pre-installation tube, and the pre-installation tube can automatically descend to the bottom and remain stationary, allowing the lower air duct to fall onto the heating box for winding welding, and the upper air duct to fall to the lower position and the pre-installation tube to rise and reset, thus improving efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of airflow beds, and particularly to a welding device for the air duct of an airflow bed heating box. Background Technology

[0002] The working principle of an airflow bed utilizes solid fluidization technology, causing microparticles within the bed to form a state similar to water "boiling" under the influence of aerodynamics. This provides upward "buoyancy," offering soft yet strong support for the patient. When the patient lies on the bed, the contact area between the body and the bed surface is large, while the contact pressure per unit area is very small. This not only ensures normal microcirculation at the points of contact between the patient's body and the bed surface but also reduces patient discomfort. The bed surface has excellent air permeability; the airflow over the body surface is gentle, warm, evenly distributed, and clean, promoting rapid wound healing. In addition to providing soft yet strong support, the microparticles within the bed can also absorb the patient's exudate. After absorption, the microparticles form large crystals that settle to the bottom of the fluidization chamber due to gravity, no longer participating in the fluidization process. Microparticles that have not absorbed exudate continue normal fluidization, and this cycle repeats continuously. This not only ensures the normal operation of the airflow bed but also fundamentally prevents bacterial growth and cross-infection, effectively guaranteeing that patients can receive treatment and recover in a clean environment.

[0003] The heating box inside the airflow bed requires welding air ducts to the round holes on both its upper and lower cover plates. The two air ducts serve as the air inlet and outlet ducts, respectively. Air enters the heating box through the air inlet duct, and the air heated by the heater in the heating box is discharged from the outlet duct. The welding methods include electric arc welding, plasma arc welding, etc. Currently, the workers need to position the heating box (upper cover plate facing up), place the air duct above the round hole and align it so that the air duct and the round hole are coaxial. The operating fixture clamps the air duct to prevent it from shifting horizontally. Then, the workers hold the welding gun and perform a wrap welding on the connection between the air duct and the upper cover plate. Then, the heating box is flipped over (lower cover plate facing up), and the above process is repeated to wrap the air duct to the lower cover plate. This process is time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a welding device for the air duct of an airflow bed heating box. The air duct can be pre-installed on the pre-installed tube, and the pre-installed tube can be automatically lowered to the bottom and remain stationary. After the lower air duct falls onto the heating box, it is wound and welded. After the upper air duct falls to the lower position, the pre-installed tube rises and resets, thereby improving efficiency.

[0005] This invention provides a welding device for the air duct of an airflow bed heating box, including a workbench 1. The workbench 1 is equipped with a first support 15 and a second support 16. A positioning frame 2, driven by a servo motor 3, is rotatably mounted on the first support 15. A clamping cylinder 4 is mounted on the top of the positioning frame 2, with an L-shaped clamping block 5 connected to the piston rod end of the clamping cylinder 4. A pre-installation tube 6 for pre-installing and positioning the air duct is elastically slidably mounted on the first support 15. A servo electric cylinder 8 is mounted on the second support 16, with a longitudinal movement member 9 connected to the piston rod end of the servo electric cylinder 8. A lifting assembly connected to the pre-installed tube 6 is provided on the pre-installed tube 6. The pre-installed tube 6 is provided with a tube-releasing mechanism 12 and a winding welding assembly 13. When the longitudinal moving member 9 moves forward, the longitudinal moving member 9 lowers the pre-installed tube 6 to the bottom through the lifting assembly and then remains stationary. The longitudinal moving member 9 then lowers the lower air duct along the pre-installed tube 6 onto the heating box through the tube-releasing mechanism 12. The longitudinal moving member 9 drives the winding welding assembly 13 to perform winding welding on the air duct. When the longitudinal moving member 9 moves backward, the longitudinal moving member 9 lowers the upper air duct to the lower position through the tube-releasing mechanism 12. The longitudinal moving member 9 drives the pre-installed tube 6 to rise and reset through the lifting assembly.

[0006] Furthermore, guide rods 7 are symmetrically arranged on the left and right sides of the upper end of the pre-installed tube 6. The guide rods 7 slide up and down on the first bracket 15. A first elastic element connecting the guide rods 7 and the first bracket 15 is provided on the outer sleeve of the guide rods 7.

[0007] Furthermore, the longitudinal moving member 9 is connected to the left bend 9.3 and right bend 9.2 on the left and right sides by a connecting strip 9.1 in the middle. The right bend 9.2 and the left bend 9.3 are both provided with first sliding pillars 9.4 in the horizontal direction. The two first sliding pillars 9.4 are symmetrically arranged on the left and right sides. The right bend 9.3 is provided with a push block 9.5. The bottom of the left bend 9.3 is provided with a rack 9.6 in the vertical direction.

[0008] Furthermore, the lifting assembly includes a lever 10 that rotates on the second bracket 16. The lever 10 has a lever groove and a first guide groove at its front and rear ends, respectively. The pre-installed tube 6 has second sliding columns 11 symmetrically arranged on its left and right sides. The first sliding column 9.4 and the second sliding column 11 are respectively slidably fitted into the first guide groove and the lever groove.

[0009] Furthermore, the first guide groove is composed of a stationary section on the front side connected to a lifting section on the rear side, and the stationary section is arranged along the length direction of the actuating rod 10.

[0010] Furthermore, the dispensing mechanism 12 includes a turntable 12.1 that rotates on the pre-loading tube 6. Lower support blocks 12.2 are symmetrically arranged on the front and rear sides of the lower end of the pre-loading tube 6 and are slidably arranged in a front-to-back manner. Upper support blocks 12.3 are symmetrically arranged on the left and right sides of the upper end of the pre-loading tube 6 and are slidably arranged in a left-to-right manner. A third sliding column is vertically arranged on both the lower support block 12.2 and the upper support block 12.3. A push column 12.4 that can be pushed by the push block 9.5 is vertically arranged at the bottom of the turntable 12.1. An elastic reset assembly 12.5 is provided on the turntable 12.1 and the pre-loading tube 6.

[0011] Furthermore, a second guide groove is provided around the turntable 12.1. The second guide groove is composed of an inner arc-shaped segment connected to an outer inclined segment. The arc trajectory of the arc-shaped segment is coaxial with the turntable 12.1. The front and rear second guide grooves are arranged in opposite directions to the left and right second guide grooves.

[0012] Furthermore, a pull rod 14 is provided at the top of the turntable 12.1.

[0013] Furthermore, the elastic reset assembly 12.5 includes tube positioning blocks 12.5.2 symmetrically arranged on the outer wall of the pre-installed tube 6, a disk positioning block 12.5.1 located between the two tube positioning blocks 12.5.2 on the turntable 12.1, a limiting block 12.5.4 located above the disk positioning block 12.5.4 on the outer wall of the pre-installed tube 6, a slider 12.5.3 connected to the tube positioning block 12.5.2 via a second elastic element, an arc-shaped guide rail 12.5.5 disposed on the outer wall of the pre-installed tube 6 and accommodating the slider 12.5.3 between the two tube positioning blocks 12.5.2, the slider 12.5.3 abutting against the disk positioning block 12.5.1 and the limiting block 12.5.4.

[0014] Furthermore, the welding assembly 13 includes a first bevel gear 13.1 that rotates on the pre-installed tube 6. A fixing block 13.6 is provided on the side wall of the pre-installed tube 6. A second bevel gear 13.4 that meshes with the first bevel gear 13.1 is rotatably provided on the fixing block 13.6. A gear 13.5 that can mesh with the rack 9.6 is coaxially connected to the outer side of the second bevel gear 13.4. A connecting block 13.2 is installed at the bottom of the first bevel gear 13.1. A welding torch 13.3 is provided on the connecting block 13.2.

[0015] The advantages of this invention are: the air duct can be pre-installed onto the pre-installed tube, and the pre-installed tube can automatically descend to the bottom and remain stationary, allowing the lower air duct to fall onto the heating box for winding welding, and the upper air duct to fall to the lower position and the pre-installed tube to rise and reset, improving efficiency; the clamping cylinder drives the clamping block to descend to clamp the heating box, and the servo motor drives the positioning frame to rotate half a turn with the heating box to flip it; the connecting strip is connected to the piston rod end of the servo electric cylinder, the first sliding column raises and lowers the pre-installed tube through the lifting assembly, the forward-moving push block pushes the push column of the discharge assembly forward, causing the turntable to rotate a certain angle and then the push block disengages from the push column, the backward-moving push block pushes the push column of the discharge assembly backward, causing the turntable to reverse a certain angle and then the push block disengages from the push column, the rack drives the winding welding assembly to perform winding welding on the air duct; the first sliding column of the longitudinal moving member drives the lever to rotate through the lifting section of the first guide groove, and the lever drives the second sliding column to raise and lower the pre-installed tube through the lever groove, the first sliding column moves along the stationary section of the first guide groove, and the lever and the pre-installed tube remain stationary; longitudinal moving The pusher block pushes the push column forward, and the rotating turntable drives the lower support block to move outward through the third sliding column. The lower air duct falls onto the heating box along the pre-installed tube, and the pre-installed tube is fitted over the air duct to position it. Then, the pusher block disengages from the push column, and the turntable resets under the action of the elastic reset component. The backward-moving pusher block pushes the push column of the discharge assembly backward, and the reverse-rotating turntable drives the upper support block to move outward through the third sliding column. The upper air duct falls onto the lower support block along the pre-installed tube. Then, the pusher block disengages from the push column, and the turntable resets under the action of the elastic reset component. The upper support block moves inward to reset when the lower block is used; when the third sliding column moves along the arc section, the support block remains stationary; when the third sliding column moves along the inclined section, the support block moves outward or inward; the pull rod is designed to facilitate the workers to insert the two air ducts in sequence; when the push block pushes the push column, the turntable rotates with the disk position block, and the disk position block pushes the slider to move along the arc guide rail; when the push block disengages from the push column, the slider pushes the disk position block to reverse and reset under the action of the second elastic element, until the slider touches the limit block, and the disk position block rotates and resets with the turntable. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention;

[0018] Figure 3 This is the front view of the present invention;

[0019] Figure 4 This is the left view of the present invention;

[0020] Figure 5 for Figure 3 AA section view;

[0021] Figure 6 for Figure 3 BB section view;

[0022] Figure 7This is a schematic diagram of the present invention with the heating box and air duct installed and the heating box clamped.

[0023] Figure 8 This is a longitudinal sectional view of the present invention when the longitudinal moving member moves forward and the pre-installed tube descends to the bottom and remains stationary;

[0024] Figure 9 This is a cross-sectional view of the present invention when the pusher block pushes the push column forward and the lower air duct falls into the heating box;

[0025] Figure 10 This is a cross-sectional view of the turntable during the resetting and welding torch winding process of the present invention.

[0026] Figure 11 This is a longitudinal sectional view of the turntable during the resetting and welding torch winding process of the present invention.

[0027] Figure 12 This is a transverse cross-sectional view of the present invention when the pusher block pushes the push column backward and the upper air duct falls to the lower position;

[0028] Figure 13 for Figure 1 Enlarged view of part C;

[0029] Figure 14 for Figure 2 Enlarged view of part D;

[0030] Figure 15 for Figure 3 Enlarged view of part E;

[0031] Figure 16 This is a schematic diagram of the longitudinal moving part of the present invention;

[0032] Figure 17 This is a schematic diagram of the turntable and pusher column of the present invention. Detailed Implementation

[0033] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0034] See Figures 1 to 17This invention provides a welding device for the air duct of an airflow bed heating box, comprising a workbench 1, on which a first support 15 and a second support 16 are provided. A positioning frame 2 driven by a servo motor 3 is rotatably mounted on the first support 15. The front end of the positioning frame is open, and the heating box moves into the positioning frame from the front. Grooves are provided at both the upper and lower ends of the positioning frame to facilitate the placement and removal of the heating box. A clamping cylinder 4 is provided with the top of the positioning frame 2 facing downward. An L-shaped clamping block 5 is connected to the piston rod end of the clamping cylinder 4. A pre-installation tube 6 for pre-installing and positioning the air duct is elastically slidably mounted on the first support 15. Guide rods 7 are symmetrically arranged on the left and right sides of the upper end of the pre-installation tube 6. The guide rods 7 are slidably mounted on the first support 15 with vertical movement. A connecting sleeve is provided for the guide rods 7 and the first support 15. The first elastic element is a spring used to support the pre-installed tube. The pre-installed tube slides up and down on the first bracket via a guide rod. A servo cylinder 8 is provided on the second bracket 16. The piston rod end of the servo cylinder 8 is connected to a longitudinal moving element 9. A lifting assembly connected to the pre-installed tube 6 is provided on the second bracket 16. A tube-releasing mechanism 12 and a winding welding assembly 13 are provided on the pre-installed tube 6. When the longitudinal moving element 9 moves forward, the longitudinal moving element 9 lowers the pre-installed tube 6 to the bottom through the lifting assembly and then remains stationary. The longitudinal moving element 9 then lowers the lower air duct along the pre-installed tube 6 onto the heating box through the tube-releasing mechanism 12. The longitudinal moving element 9 drives the winding welding assembly 13 to perform winding welding on the air duct. When the longitudinal moving element 9 moves backward, the longitudinal moving element 9 lowers the upper air duct to the lower position through the tube-releasing mechanism 12. The longitudinal moving element 9 drives the pre-installed tube 6 to rise and reset through the lifting assembly. Workers can place the heating box into the positioning frame, and the clamping cylinder drives the clamping block to descend and clamp the heating box. Then, the two air ducts are sequentially placed into the pre-installed tube (the air duct placement mechanism holds the two air duct frames in the upper and lower positions respectively). The air ducts can be pre-installed; the circular hole on the upper side of the heating box aligns with the axis of the pre-installed tube. A servo cylinder drives the longitudinal moving component forward. The longitudinal moving component, through the lifting assembly, lowers the pre-installed tube to the bottom and then remains stationary. The longitudinal moving component then uses the air duct placement mechanism to lower the lower air duct along the pre-installed tube onto the heating box. The pre-installed tube is then fitted over the air duct to position it. The longitudinal moving component drives the winding welding assembly to perform winding welding at the connection between the air duct and the heating box. Then, the longitudinal moving component moves backward and uses the tube-releasing mechanism to lower the upper air duct to the lower position and support it. The longitudinal moving component drives the pre-installed tube to rise and reset through the lifting assembly, completing the welding of the air duct on one side of the heating box. Then, the servo motor drives the positioning frame to rotate the heating box half a turn. The circular hole on the lower side of the heating box is aligned with the axis of the pre-installed tube. The welding of the air duct on the other side of the heating box is completed according to the above steps (the welded air duct is the one that has fallen to the lower position).

[0035] See Figure 14 , Figure 16The longitudinal moving part 9 is connected to the left bend 9.3 and right bend 9.2 on both sides by a connecting strip 9.1 in the middle. A first sliding column 9.4 is horizontally arranged on both the right bend 9.2 and the left bend 9.3, and the two first sliding columns 9.4 are symmetrically arranged. A push block 9.5 is provided on the right bend 9.3, and a rack 9.6 is vertically arranged at the bottom of the left bend 9.3. The connecting strip is connected to the piston rod end of the servo electric cylinder. The first sliding column raises and lowers the pre-loaded tube through the lifting assembly. The forward-moving push block pushes the push column of the discharge assembly forward, causing the turntable to rotate a certain angle before the push block disengages from the push column. The backward-moving push block pushes the push column of the discharge assembly backward, causing the turntable to reverse a certain angle before the push block disengages from the push column. The rack drives the winding welding assembly to perform winding welding on the air duct.

[0036] The lifting assembly includes a lever 10 that rotates on the second bracket 16. The front and rear ends of the lever 10 are respectively provided with a lever groove and a first guide groove. The left and right sides of the pre-installed tube 6 are symmetrically provided with second sliding columns 11. The first sliding column 9.4 and the second sliding column 11 are respectively slidably fitted into the first guide groove and the lever groove. The first guide groove is composed of a stationary section on the front side connected to a lifting section on the rear side. The stationary section is arranged along the length direction of the lever 10. When the longitudinal component moves forward, the first sliding column of the longitudinal component drives the lever to rotate through the lifting section of the first guide groove. The lever drives the second sliding column, carrying the pre-installed tube, to descend to the bottom through the lever groove. The longitudinal component continues to move forward, and the first sliding column moves along the stationary section of the first guide groove. The lever and the pre-installed tube remain stationary so that the lower air duct can be lowered by the tube-laying mechanism and the winding welding assembly can be used for winding welding of the air duct. When the longitudinal component moves backward, the first sliding column moves along the stationary section of the first guide groove. The lever and the pre-installed tube remain stationary so that the upper air duct can be lowered by the tube-laying mechanism. Then, the first sliding column drives the lever to reverse and reset through the lifting section of the first guide groove, and the second sliding column, carrying the pre-installed tube, rises and resets.

[0037] The tube-dispensing mechanism 12 includes a turntable 12.1 that rotates on the pre-loading tube 6. Lower support blocks 12.2 are symmetrically arranged on the front and rear sides of the lower end of the pre-loading tube 6 and are slidably arranged in the front and rear. Upper support blocks 12.3 are symmetrically arranged on the left and right sides of the upper end of the pre-loading tube 6 and are slidably arranged in the left and right. A third sliding column is vertically arranged on both the lower support block 12.2 and the upper support block 12.3. A push column 12.4 that can be pushed by the push block 9.5 is vertically arranged at the bottom of the turntable 12.1. An elastic reset assembly 12.5 is arranged on the turntable 12.1 and the pre-loading tube 6. When the longitudinal moving component moves forward, the push block of the longitudinal moving component pushes the push column of the discharge cylinder assembly forward, causing the turntable to rotate clockwise by a certain angle when viewed from above. The turntable drives the lower support block to move outward through the third sliding column, and the lower air duct falls onto the heating box along the pre-installed tube (the air duct and the circular hole of the heating box are coaxial, and the inner wall of the air duct coincides with the inner wall of the circular hole). The pre-installed tube is fitted over the air duct to position it. Then the push block disengages from the push column, and the turntable resets under the action of the elastic reset component. The lower support block moves inward to reset. The bottom edge of the lower support block is rounded, and the lower support block can limit the upper end face of the air duct. The upper and lower end faces of the air duct are both restricted, thus positioning the air duct. The push block that moves backward pushes the push column of the discharge cylinder assembly backward, causing the turntable to reverse by a certain angle. The turntable drives the upper support block to move outward through the third sliding column, and the upper air duct falls onto the lower support block along the pre-installed tube. Then the push block disengages from the push column, and the turntable resets under the action of the elastic reset component. The upper support block moves inward to reset.

[0038] See Figure 6 , Figure 17 The turntable 12.1 is provided with a second guide groove around its perimeter. The second guide groove consists of an inner arc-shaped segment connecting to an outer inclined segment. The arc-shaped trajectory of the arc-shaped segment is set coaxially with the turntable 12.1. The front and rear second guide grooves are set in the opposite direction to the left and right second guide grooves. The front and rear second guide grooves are distributed circumferentially along the axis of the turntable, and the left and right second guide grooves are also distributed circumferentially along the axis of the turntable. When the third sliding column moves along the arc-shaped segment, the support block remains stationary. When the third sliding column moves along the inclined segment, the support block moves outward or inward.

[0039] A pull rod 14 is provided at the top of the turntable 12.1. The pull rod is provided so that when the staff puts in the two air ducts in sequence, they can pull the pull rod to rotate the turntable, so that the upper support block moves outward so that the lower air duct can be placed on the lower support block. Then, the pull rod is released so that the upper support block moves inward to reset so that the upper air duct can be placed on the upper support block.

[0040] The elastic reset assembly 12.5 includes tube positioning blocks 12.5.2 symmetrically arranged on the outer wall of the pre-installed tube 6. A disk positioning block 12.5.1 located between the two tube positioning blocks 12.5.2 is arranged on the turntable 12.1. A limiting block 12.5.4 located above the disk positioning block 12.5.4 is arranged on the outer wall of the pre-installed tube 6. The tube positioning blocks 12.5.2 are connected to a slider 12.5.3 through a second elastic element. An arc-shaped guide rail 12.5.5 is arranged between the two tube positioning blocks 12.5.2, located on the outer wall of the pre-installed tube 6, and allows the slider 12.5.3 to slide. The slider 12.5.3 abuts against the disk positioning block 12.5.1 and the limiting block 12.5.4. The second elastic element is a compression spring. When the push block pushes the push column, the turntable rotates with the disk position block. The disk position block pushes the slider to move along the arc-shaped guide rail. When the push block disengages from the push column, the slider pushes the disk position block to reverse and reset under the action of the second elastic element until the slider touches the limit block (the disk position block is held in place by the sliders on both sides). The disk position block then rotates and resets with the turntable.

[0041] The winding welding assembly 13 includes a first bevel gear 13.1 rotating on the pre-installed tube 6. A fixing block 13.6 is provided on the side wall of the pre-installed tube 6. A second bevel gear 13.4, meshing with the first bevel gear 13.1, is rotatably mounted on the fixing block 13.6. A gear 13.5, which meshes with the rack 9.6, is coaxially connected to the outer side of the second bevel gear 13.4. A connecting block 13.2 is installed at the bottom of the first bevel gear 13.1, and a welding torch 13.3 is provided on the connecting block 13.2. When the longitudinal moving member moves forward, the rack of the longitudinal moving member drives the gear to rotate. The gear drives the first bevel gear to rotate through the second bevel gear. The first bevel gear drives the welding torch to rotate one revolution through the connecting block. The welding torch performs winding welding on the connection between the air duct and the heating box.

[0042] The specific workflow of this invention is as follows: The operator places the heating box into the positioning frame and positions it. The clamping cylinder drives the clamping block to descend and clamp the heating box. The two air ducts are then placed sequentially into the pre-installed tube. The operator rotates the turntable via a pull rod, causing the upper support block to move outward so that the lower air duct rests on the lower support block. Then, the pull rod is released, causing the upper support block to move inward and reset so that the upper air duct rests on the upper support block. The air ducts can be pre-installed. The circular hole on the upper side of the heating box is aligned with the axis of the pre-installed tube. Figure 7 As shown, the servo electric cylinder drives the longitudinal moving component forward. The first sliding column of the longitudinal moving component drives the lever to rotate through the lifting section of the first guide groove. The lever drives the second sliding column, carrying the pre-installed tube, to descend to the bottom through the lever groove. The first sliding column moves along the stationary section of the first guide groove. The lever and the stationary groove remain longitudinally aligned, and the lever and the pre-installed tube remain stationary. Figure 8As shown, the pusher block of the longitudinal moving component pushes the pusher column forward, causing the turntable to rotate clockwise by a certain angle when viewed from above. The turntable drives the lower support block to move outward via the third sliding column (the lower support block is in the inclined section, while the upper support block remains stationary in the arc section). The lower air duct falls onto the heating box along the pre-installed tube (the air duct and the circular hole of the heating box are coaxial, and the inner wall of the air duct coincides with the inner wall of the circular hole). The pre-installed tube is fitted over the air duct to position it. Figure 9 As shown, the push block then disengages from the push column, the turntable resets under the action of the elastic reset component, and the lower support block moves inward to reset. The lower support block can limit the upper end face of the air duct, thus positioning the air duct by restricting both the upper and lower end faces. Then, the rack of the longitudinal moving component drives the gear to rotate, and the gear rotates the first bevel gear through the second bevel gear. The first bevel gear rotates the welding torch one revolution through the connecting block, and the welding torch performs a circular weld on the connection between the air duct and the heating box, as shown. Figure 10 , 11 As shown, the servo cylinder then drives the longitudinal moving component to move backward and reset. The first sliding column moves along the stationary section of the first guide groove, while the lever and pre-installed tube remain stationary. The push block pushes the push column backward, causing the turntable to reverse a certain angle. The turntable, through the third sliding column, drives the upper support block to move outward (the upper support block is in the inclined section, and the lower support block is stationary in the arc section). The upper air duct falls onto the lower support block along the pre-installed tube, as shown. Figure 12 As shown, the push block then disengages from the push column, the turntable resets under the action of the elastic reset component, the upper support block moves inward to reset, then the first sliding column drives the lever to reverse and reset through the lifting section of the first guide groove, and the second sliding column carries the pre-installed tube upward to reset, completing the welding of the air duct on one side of the heating box. Then the servo motor drives the positioning frame to rotate the heating box half a turn, and the circular hole on the lower side of the heating box is aligned with the axis of the pre-installed tube. The welding of the air duct on the other side of the heating box is completed according to the above steps (the welded air duct is the air duct that falls to the lower position).

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A welding device for the air duct of an air-flow bed heating box, comprising a worktable, a first support and a second support on the worktable, a positioning frame driven by a servo motor rotatably mounted on the first support, a clamping cylinder with its top facing downwards mounted on the positioning frame, an L-shaped clamping block connected to the piston rod end of the clamping cylinder, a pre-installation tube for pre-installing and positioning the air duct elastically sliding on the first support, a servo electric cylinder mounted on the second support, a longitudinal movement member connected to the piston rod end of the servo electric cylinder, and a connecting... The lifting assembly connected to the pre-installed tube includes a tube-releasing mechanism and a winding welding assembly. When the longitudinal moving member moves forward, it lowers the pre-installed tube to the bottom via the lifting assembly and remains stationary. Then, the tube-releasing mechanism causes the lower air duct to fall onto the heating box along the pre-installed tube. The longitudinal moving member drives the winding welding assembly to perform winding welding on the air duct. When the longitudinal moving member moves backward, it lowers the upper air duct to the lower position via the tube-releasing mechanism. The longitudinal moving member then drives the pre-installed tube to rise and reset via the lifting assembly. The left and right bends are connected by a central connecting strip. A first sliding post is horizontally arranged on both the right and left bends, symmetrically arranged. A push block is provided on the right bend, and a rack is vertically arranged at the bottom of the left bend. The tube-dispensing mechanism includes a turntable that rotates on the pre-loaded tube. Lower support blocks are symmetrically arranged on the front and rear sides of the lower end of the pre-loaded tube and slidably arranged in a front-to-back manner. Upper support blocks are symmetrically arranged on the left and right sides of the upper end of the pre-loaded tube and slidably arranged in a left-to-right manner. Vertical supports are provided on both the lower and upper support blocks. A third sliding column is vertically arranged, and a push column that can be pushed by the push block is vertically arranged at the bottom of the turntable. An elastic reset assembly is arranged on the turntable and the pre-loading tube. The welding assembly includes a first bevel gear that rotates on the pre-loading tube. A fixing block is arranged on the side wall of the pre-loading tube. A second bevel gear that meshes with the first bevel gear is rotatably arranged on the fixing block. A gear that can mesh with the rack is coaxially connected to the outer side of the second bevel gear. A connecting block is installed at the bottom of the first bevel gear. A welding torch is arranged on the connecting block.

2. The air duct welding device for an airflow bed heating box as described in claim 1, characterized in that: Guide rods are symmetrically arranged on the left and right sides of the upper end of the pre-installed tube. The guide rods slide up and down on the first bracket. A first elastic element connecting the guide rod and the first bracket is provided on the outer sleeve of the guide rod.

3. The air duct welding device for an airflow bed heating box as described in claim 1, characterized in that: The lifting assembly includes a lever that rotates on the second bracket. The front and rear ends of the lever are respectively provided with a lever groove and a first guide groove. The left and right sides of the pre-installed tube sidewall are symmetrically provided with second sliding columns. The first sliding column and the second sliding column are respectively slidably fitted into the first guide groove and the lever groove.

4. The air duct welding device for an airflow bed heating box as described in claim 3, characterized in that: The first guide groove is composed of a stationary section on the front side and a lifting section on the rear side, and the stationary section is arranged along the length direction of the actuating rod.

5. The air duct welding device for an airflow bed heating box as described in claim 1, characterized in that: The turntable is provided with a second guide groove around its perimeter. The second guide groove is composed of an inner arc-shaped segment connected to an outer inclined segment. The arc-shaped trajectory of the arc segment is set coaxially with the turntable. The front and rear second guide grooves are set in the opposite direction to the left and right second guide grooves.

6. The air duct welding device for an airflow bed heating box as described in claim 1, characterized in that: A pull rod is provided at the top of the turntable.

7. The air duct welding device for an airflow bed heating box as described in claim 1, characterized in that: The elastic reset assembly includes tube positioning blocks symmetrically arranged on the outer wall of the pre-installed tube, a disk positioning block located between the two tube positioning blocks on the turntable, a limiting block located above the disk positioning block on the outer wall of the pre-installed tube, a slider connected to the tube positioning block through a second elastic element, an arc-shaped guide rail disposed on the outer wall of the pre-installed tube and allowing the slider to slide between the two tube positioning blocks, and the slider abutting against the disk positioning block and the limiting block.

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