An automatic welding machine for tent frames

Abstract

This invention belongs to the field of welding technology and discloses an automatic welding machine for tent frames, including a base and a fixed seat fixed to the top of the base. A rotating cylinder is rotatably installed inside the fixed seat, and a clamping sleeve is slidably installed inside the rotating cylinder. This invention inputs pressurized air into the rotating spindle through an air supply component, which, in conjunction with a composite processing component rotatably mounted on the rotating spindle, positions the composite processing component between the ends of two sets of pipes before welding. This allows the pipes and the grinding disc to rotate simultaneously when the motor is started. By using different rotation directions, the front ends of the two sets of pipes are intermittently ground before welding. No additional grinding power equipment is needed. Combined with the motor and rotating spindle that enable rotational welding, bidirectional rotational grinding can be achieved. The intermittent grinding avoids overheating and deformation of the pipe ends caused by continuous contact grinding. The actual grinding effect is good, the investment in power equipment is low, and the usage effect is excellent.

Description

Technical Field

[0001] This invention belongs to the field of welding technology, specifically an automatic welding machine for tent frames. Background Technology

[0002] The tent frame is a key component of the main structure of the tent. It is responsible for supporting the entire tent frame and ensuring the tent's stability and shape. The welding process for the tent frame usually involves welding the pipes inside the tent frame together.

[0003] Existing automatic tent frame welding machines often require grinding the ends of the pipes to be welded during use to maintain flatness and improve the stability and quality of subsequent welding. However, the grinding and subsequent rotational welding processes often require multiple sets of power equipment to rotate the pipes to be welded, provide power to the grinding section, and perform rotation after grinding. This results in a complex structure, a large investment in power equipment, and continuous contact grinding for the ends. For thinner pipes, continuous rotational grinding at the ends can easily cause overheating and deformation, which in turn affects the quality of subsequent welding, leading to poor practical results.

[0004] Furthermore, in existing automatic tent frame welding machines, after welding, a large amount of welding slag and protrusions are present on the outer weld seam of the pipe, requiring secondary grinding of the welded pipe. However, the current secondary grinding process still requires further replacement of grinding components, making the entire welding machine structure complex and increasing the number of power equipment. Moreover, for grinding the outer weld seam of round pipes, the grinding contact area is currently limited, resulting in poor grinding quality. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic welding machine for tent frames to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic tent frame welding machine, comprising a base and a fixed seat fixed to the top of the base, a rotating cylinder rotatably mounted inside the fixed seat, a clamping sleeve slidably mounted inside the rotating cylinder, a control component provided on the outer side of the clamping sleeve, the control component controlling the clamping sleeve to clamp and fix the pipe to be welded via pressurized air, and controlling the lateral movement of the clamping sleeve, an air supply component fixedly mounted on the top of the base, one air outlet of the air supply component communicating with the interior of the fixed seat, a rotating main shaft provided on the back of the fixed seat, a drive gear sleeved on the outer surface of the rotating main shaft, a composite processing component rotatably sleeved on the outer surface of the rotating main shaft, the drive gear driving the rotating cylinder to rotate, the composite processing component grinding the end of the pipe to be welded when rotating, and grinding the outer side of the pipe to be welded when fixed, and a welding end fixedly mounted on the top of the fixed seat;

[0007] The composite processing assembly includes a movable tube rotatably sleeved on a rotating main shaft, an electric push rod fixedly installed on the outer side of the movable tube, a grinding disc fixedly on the free end of the electric push rod, and a side disc fixedly sleeved on the outside of the movable tube.

[0008] Preferably, the fixed base has an internal cavity, and a motor is fixedly mounted on the back of the fixed base. The output shaft of the motor is fixedly connected to the rotating main shaft and drives the rotating main shaft to rotate. The rotating cylinder includes a cylinder body and a driven gear. The driven gear is fixedly sleeved on the outer surface of the cylinder body and meshes with the driving gear. There are two fixed bases, which are symmetrically distributed on the top of the base. The cylinder body corresponds to the fixed base one by one and is rotatably sleeved inside the fixed base. The inner wall of the cylinder body has a sliding groove, and a guide tube is fixedly connected in the internal cavity.

[0009] Preferably, the clamping sleeve includes a clamping cylinder, an inner groove, a through hole, and a first clamping part. The clamping cylinder is movably sleeved in the cylinder body. The inner groove is opened inside the clamping cylinder and is distributed at equal intervals around it. The through hole is opened on the outer side of the clamping cylinder and corresponds to the inner groove one by one. The inner groove and the through hole are connected. The first clamping part is elastically sleeved in the inner groove. The first clamping part includes a clamping plate and a spring. One end of the spring is fixedly connected to the clamping plate and the other end is fixed in the inner groove. A sliding plate is fixedly connected to the outer side of the clamping cylinder. The sliding plate is slidably sleeved with the sliding groove.

[0010] Preferably, the control component includes a distribution ring, a ring groove, an auxiliary air pump, an auxiliary air pipe, a pull rod, and a return spring. The distribution ring is movably sleeved on the outer side of the clamping cylinder. The ring groove is formed inside the distribution ring and communicates with the through hole. The auxiliary air pump is fixed on the top of the fixed base. One end of the auxiliary air pipe is fixedly connected to and communicates with the air outlet of the auxiliary air pump. The other end of the auxiliary air pipe is fixedly connected to the distribution ring and communicates with the ring groove. One end of the pull rod is fixedly connected to the distribution ring. The other end of the pull rod is movably sleeved in the fixed base and extends into the internal cavity. The inner end of the pull rod is provided with a piston sleeve. One end of the return spring is fixed in the internal cavity, and the other end is fixedly connected to the piston sleeve. The piston sleeve is movably sleeved with the guide tube.

[0011] Preferably, the air supply assembly includes a main air pump, a connecting sleeve, a first valve, a second valve, and an intermediate pipe. The connecting sleeve is fixed to and connected to the air outlet of the main air pump. The first valve is fixedly fitted into the connecting sleeve. The second valve is connected to the first valve through the intermediate pipe. The two ends of the connecting sleeve are fixedly connected to two fixed seats and connected to a guide pipe.

[0012] Preferably, the rotating spindle includes a shaft body, a communicating cavity, an assembly groove, a side opening, and a second clamping part. The shaft body is fixedly sleeved with the driving gear. The communicating cavity is opened at the end of the shaft body and extends into the interior. The assembly groove is opened on the outer surface of the shaft body. The side opening is opened on the outer side of the shaft body and communicates with the communicating cavity. The side opening is located inside the assembly groove. The second clamping part is elastically installed in the side opening. The second clamping part includes a second clamping plate, a second spring, and a positioning frame. The positioning frame is fixedly sleeved in the side opening. One end of the second spring is fixedly connected to the positioning frame, and the other end is fixedly connected to the second clamping plate.

[0013] Preferably, the movable tube is rotatably sleeved in the assembly groove, the area of ​​the grinding disc is larger than the end face area of ​​the pipe to be welded, an arc-shaped groove is provided at the front of the outer surface of the grinding disc, and a positioning hole is provided on the side of the grinding disc.

[0014] Preferably, a positioning component is fixedly provided on the top of the base. The positioning component includes a vertical plate and a positioning bolt. The vertical plate is fixed to the top of the base by a bottom support plate. The positioning bolt is spirally sleeved on the side of the vertical plate and is located on the rotation path of the positioning hole.

[0015] Preferably, the back of the fixed seat is provided with a communication mechanism, one end of which is fixedly connected to the second valve, and the other end is sleeved on the outer end of the shaft and connected to the communication cavity.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. This invention utilizes a control component to input pressurized air into the clamping sleeve, fixing the inserted pipeline. Combined with the sliding engagement of the slide groove and slide plate, a rotating cylinder drives the clamping sleeve to rotate. The rotating main shaft, via a drive gear, rotates the rotating cylinder, thus rotating the pipeline to be welded. This allows for circumferential welding of the pipeline at the top welding end. Furthermore, a pressurized air supply component inputs pressurized air into the rotating main shaft, coordinating with a composite processing component mounted on the rotating main shaft. Before welding, the composite processing component is positioned between the ends of the two sets of pipelines. This allows for simultaneous rotation of the pipelines and the grinding disc when the motor is started. Different rotation directions allow for intermittent grinding of the two sets of pipeline ends before welding. No additional grinding power equipment is required. The motor and rotating main shaft, combined with the rotating welding mechanism, enable bidirectional grinding. The intermittent grinding avoids overheating and deformation of the pipeline ends caused by continuous contact grinding. The actual grinding effect is good, requiring minimal investment in power equipment and offering excellent performance.

[0018] 2. This invention reuses the composite processing component. After grinding and welding, the independent rotation of the main shaft, combined with the laterally fixed composite processing component and its lateral movement, brings the welded pipe closer to its outer side. Using a single motor and the rotation of the main shaft, the welded pipe rotates while a stationary grinding disc on the outer side grinds the welded area again, improving its smoothness. This secondary grinding is still performed using the same single motor, saving on power equipment investment. The operation is simple and quick, and the secondary grinding effect is excellent.

[0019] 3. This invention, by switching the air supply direction of the air supply component, uses compressed air to fix the composite processing component and controls the lateral movement of the control component. The former ensures the stable rotation of the composite processing component and achieves end grinding, while the latter controls the movement of the clamped and fixed pipeline. Especially after end grinding, it quickly achieves synchronous movement and alignment of the pipelines on both sides, ensuring that the aligned welding position is centered and located directly below the welding end. The actual alignment accuracy is high and the speed is fast, which improves the positioning effect during welding and further reduces the investment in power equipment. The control of two different working states is concentrated in a single air supply component, which achieves good results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the back of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0023] Figure 4 This is a cross-sectional schematic diagram of the fixed base and rotating cylinder of the present invention;

[0024] Figure 5 This is a cross-sectional schematic diagram of the fixing base of the present invention;

[0025] Figure 6 This is a schematic diagram of the control component of the present invention;

[0026] Figure 7 This is an exploded view of the clamping sleeve of the present invention;

[0027] Figure 8 This is a cross-sectional schematic diagram of the clamping sleeve of the present invention;

[0028] Figure 9 This is a schematic diagram of the gas supply component of the present invention;

[0029] Figure 10 This is a schematic diagram of the rotating spindle and the driving gear of the present invention;

[0030] Figure 11 This is a schematic diagram of the composite processing component of the present invention;

[0031] Figure 12 This is a schematic diagram of the rotating spindle of the present invention;

[0032] Figure 13 for Figure 12 Enlarged structural diagram at point A;

[0033] Figure 14 This is a schematic diagram of the positioning component of the present invention.

[0034] In the diagram: 1. Base; 2. Fixed seat; 3. Rotating cylinder; 31. Cylinder body; 32. Driven gear; 4. Internal cavity; 5. Clamping sleeve; 51. Clamping cylinder; 52. Inner groove; 53. Through hole; 54. No. 1 clamping part; 6. Control component; 61. Distribution ring; 62. Ring groove; 63. Auxiliary air pump; 64. Auxiliary air pipe; 65. Pull rod; 66. Return spring; 7. Air supply component; 71. Main air pump; 72. Connecting sleeve; 73. No. 1 valve; 74. Valve No. 2; 75. Intermediate pipe; 8. Rotating spindle; 81. Shaft body; 82. Connecting cavity; 83. Assembly slot; 84. Side opening; 85. No. 2 clamping part; 9. Drive gear; 10. Composite processing component; 101. Movable pipe; 102. Electric push rod; 103. Grinding disc; 104. Side plate; 11. Positioning component; 111. Vertical plate; 112. Positioning bolt; 12. Connecting mechanism; 13. Welding end; 14. Guide pipe. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1 to 14 As shown, this embodiment of the invention provides an automatic tent frame welding machine, including a base 1 and a fixed seat 2 fixed on the top of the base 1. A rotating cylinder 3 is rotatably installed inside the fixed seat 2, and a clamping sleeve 5 is slidably installed inside the rotating cylinder 3. A control component 6 is provided on the outside of the clamping sleeve 5. The control component 6 controls the clamping sleeve 5 to clamp and fix the pipe to be welded by pressurized air, and controls the clamping sleeve 5 to move laterally. An air supply component 7 is fixed on the top of the base 1. One air outlet of the air supply component 7 is connected to the inside of the fixed seat 2. A rotating spindle 8 is provided on the back of the fixed seat 2. A drive gear 9 is sleeved on the outer surface of the rotating spindle 8. A composite processing component 10 is rotatably sleeved on the outer surface of the rotating spindle 8. The drive gear 9 drives the rotating cylinder 3 to rotate. When the composite processing component 10 rotates, it grinds the end of the pipe to be welded, and when it is fixed, it grinds the outside of the pipe to be welded. A welding end 13 is fixed on the top of the fixed seat 2.

[0037] The composite processing assembly 10 includes a movable tube 101 rotatably sleeved on a rotating spindle 8, an electric push rod 102 fixedly installed on the outer side of the movable tube 101, a grinding disc 103 fixedly installed on the free end of the electric push rod 102, and a side disc 104 fixedly sleeved on the outside of the movable tube 101.

[0038] Example 1: Before welding, adjust the position of the composite processing component 10 so that the movable tube 101 rotates around the rotating main shaft 8 to a horizontal state, and start the air supply component 7. Use valve 73 to guide the input pressurized air into the intermediate tube 75, and use valve 74 to input the gas into the connecting mechanism 12, so that the pressurized air is guided into the connecting cavity 82 of the rotating main shaft 8. The pressurized air acts on the side port 84 and pushes the second clamping parts 85 distributed on both sides to move, supporting and fixing the outer movable tube 101 from the inside. Then, put the two tent bracket pipes to be welded into the clamping sleeve 5, and keep the front end of the pipe to be welded in the cylinder 31 of the rotating cylinder 3, and keep the front end of the pipe to be welded in contact with the side of the grinding disc 103 in the composite processing component 10. Start the auxiliary air pump 63 in the control component 6, so that the pressurized air is supplied through the side port 82. The auxiliary air pipe 64 enters the distribution ring 61 and is fed into the through hole 53 of the clamping sleeve 5 through the ring groove 62. Further pressurized air is fed into the corresponding inner groove 52 through the through hole 53 and pushes the elastically connected first clamping part 54 to move laterally. The first clamping part 54, which is distributed around the ring, moves and clamps and fixes the pipe to be welded. The motor is started and drives the rotating spindle 8 to rotate, so that the driving gear 9 drives the driven gear 32 to rotate, so that the rotating cylinder 3 drives the internal clamping sleeve 5 and the fixed pipe to be welded to rotate together. As the ends of the pipes to be welded on both sides rotate on their own, the rotating spindle 8 simultaneously drives the installed and fixed composite processing component 10 to rotate. While the pipes to be welded on both sides rotate on their own, the grinding disc 103 rotates and intermittently passes between the pipes to be welded on both sides to achieve intermittent grinding treatment and complete the pipe end treatment before welding.

[0039] First, by using the control component 6 to input pressurized air into the clamping sleeve 5, the inserted pipeline is fixed. Combined with the sliding engagement of the groove and slide plate, the rotating cylinder 3 drives the clamping sleeve 5 to rotate. The rotating spindle 8, via the drive gear 9, drives the rotating cylinder 3 to rotate, thus rotating the pipeline to be welded. This, in conjunction with the top welding end 13, enables the circumferential welding of the pipeline. Furthermore, by inputting pressurized air into the rotating spindle 8 through the air supply component 7, the composite processing component 10, mounted on the rotating spindle 8, is positioned between the ends of the two sets of pipelines before welding. This allows the pipelines and the grinding disc 103 to rotate simultaneously when the motor is started. Different rotation directions are used to intermittently grind the ends of the two sets of pipelines before welding. No additional grinding power equipment is needed. The motor and rotating spindle 8, combined with the rotating welding motor, achieve bidirectional grinding. The intermittent grinding avoids overheating and deformation of the pipeline ends caused by continuous contact grinding. The actual grinding effect is good, with minimal investment in power equipment and excellent performance.

[0040] Example 2: After the end processing is completed, the pressure air input into the rotating spindle 8 is stopped, the second clamping part 85 is reset, and the electric push rod 102 in the composite processing assembly 10 is activated, causing the grinding disc 103 to exit between the ends of the two pipes. The composite processing assembly 10, which is no longer fixed, naturally swings down vertically. The first valve 73 is controlled to operate, further inputting the pressure air from the main air pump 71 into the guide pipe 14 in the internal cavity 4. In the internal cavity 4, the piston sleeve on the inner end of the pull rod 65 is pushed laterally, causing the pressure air to push the pull rod 65 laterally. The two pull rods 65 move along the clamping sleeve 5 and push the slide plate, causing the clamping sleeves 5 on both sides to move synchronously and come together. This allows the two sets of end-grinding pipes to approach and fit together synchronously, completing the positioning for welding. The process is restarted. The motor is activated, causing the rotating spindle 8 to rotate, which in turn causes the rotating cylinder 3 to rotate, thus rotating the pipeline. The welding end 13 is then activated, moving downwards and closer to the connection point of the two sets of pipelines for welding and fixing. During welding, the composite processing component 10 remains stationary. After welding is completed, the welding end 13 is removed, and the composite processing component 10 is adjusted to be horizontal. The positioning bolt 112 in the positioning component 11 is rotated, fixing the composite processing component 10 in the positioning component 11 and keeping it horizontal and stable. The electric push rod 102 is activated, driving the grinding disc 103 to move horizontally and closer to the outside of the welded pipeline. The rotating spindle 8 is kept rotating to achieve the rotation of the rotating cylinder 3, so that the welded pipeline maintains its rotation while contacting and grinding the arc groove of the outer grinding disc 103, thus achieving the grinding treatment of the outer ring weld after welding.

[0041] First, by reusing the composite processing component 10, after grinding and welding, the independent rotation of the rotating spindle 8, in conjunction with the laterally fixed composite processing component 10 and its lateral movement, brings the welded pipe closer to the outside. Using a single motor and the rotation of the rotating spindle 8, the welded pipe rotates while the grinding disc 103, stationary on the outside, grinds the welded area again, improving its smoothness. This secondary grinding is still achieved using the aforementioned single-motor setup, saving on power equipment investment, making operation simple and quick, and resulting in excellent secondary grinding performance.

[0042] Furthermore, by switching the air supply direction of the air supply component 7, the composite processing component 10 is fixed using compressed air, while the control component 6 moves laterally. The former ensures the stable rotation of the composite processing component 10 and enables end grinding, while the latter controls the movement of the clamped and fixed pipeline. Especially after end grinding, the synchronous movement and alignment of the pipelines on both sides are quickly achieved, ensuring that the aligned welding position is centered and located directly below the welding end 13. The actual alignment accuracy is high and the speed is fast, which improves the positioning effect during welding and further reduces the investment in power equipment. The control of the two different working states is concentrated in a single air supply component 7, which achieves good results.

[0043] The fixed base 2 has an internal cavity 4. A motor is fixedly mounted on the back of the fixed base 2. The output shaft of the motor is fixedly connected to the rotating main shaft 8 and drives the rotating main shaft 8 to rotate. The rotating cylinder 3 includes a cylinder body 31 and a driven gear 32. The driven gear 32 is fixedly sleeved on the outer surface of the cylinder body 31 and meshes with the driving gear 9. There are two fixed bases 2, which are symmetrically distributed on the top of the base 1. The cylinder body 31 corresponds to the fixed base 2 and is rotatably sleeved inside the fixed base 2. The inner wall of the cylinder body 31 has a sliding groove. A guide tube 14 is fixedly mounted inside the internal cavity 4.

[0044] By using the fixed base 2 to support the installation of the rotating cylinder 3, and with the matching arc groove in the fixed base 2 and the retaining ring on the outside of the rotating cylinder 3, stable rotation is achieved. The motor is a single-set power motor, which realizes the rotation of the rotating main shaft 8 and provides power for rotating welding, rotating end grinding and rotating side grinding. The guide tube 14 changes the airflow entry position in the internal cavity 4.

[0045] The clamping sleeve 5 includes a clamping cylinder 51, an inner groove 52, a through hole 53, and a first clamping part 54. The clamping cylinder 51 is movably sleeved in the cylinder body 31. The inner groove 52 is opened inside the clamping cylinder 51 and is distributed around it at equal intervals. The through hole 53 is opened on the outer side of the clamping cylinder 51 and corresponds one-to-one with the inner groove 52. The inner groove 52 and the through hole 53 are connected. The first clamping part 54 is elastically sleeved in the inner groove 52. The first clamping part 54 includes a clamping plate and a spring. One end of the spring is fixedly connected to the clamping plate and the other end is fixed in the inner groove 52. A sliding plate is fixedly connected to the outer side of the clamping cylinder 51. The sliding plate is slidably sleeved with the sliding groove.

[0046] The clamping sleeve 5 is used to clamp and fix the inserted pipe. With the sliding connection of the slide plate and the slide groove, the clamping sleeve 5 rotates with the rotating cylinder 3. The first clamping part 54 bears the air pressure thrust and clamps and fixes the pipe. The first spring is used for elastic reset, and the through hole 53 is used to communicate with the supplied pressurized air.

[0047] The control component 6 includes a distribution ring 61, an annular groove 62, an auxiliary air pump 63, an auxiliary air pipe 64, a pull rod 65, and a return spring 66. The distribution ring 61 is movably sleeved on the outer surface of the clamping cylinder 51. The annular groove 62 is opened inside the distribution ring 61 and communicates with the through hole 53. The auxiliary air pump 63 is fixed on the top of the fixed base 2. One end of the auxiliary air pipe 64 is fixedly connected to and communicates with the air outlet end of the auxiliary air pump 63. The other end of the auxiliary air pipe 64 is fixedly connected to the distribution ring 61 and communicates with the annular groove 62. One end of the pull rod 65 is fixedly connected to the distribution ring 61. The other end of the pull rod 65 is movably sleeved in the fixed base 2 and extends into the inner cavity 4. The inner end of the pull rod 65 is provided with a piston sleeve. One end of the return spring 66 is fixed in the inner cavity 4, and the other end is fixedly connected to the piston sleeve. The piston sleeve is movably sleeved with the guide tube 14.

[0048] The control component 6 vents air into the clamping sleeve 5 and uses the pressurized air to clamp and fix it. The auxiliary air pipe 64 is a flexible hose. Sealing rings are provided on both sides of the inner cavity of the distribution ring 61 to ensure the dynamic seal between the distribution ring 61 and the clamping sleeve 51. This ensures that the clamping sleeve 51 is kept sealed when it rotates relative to the clamping sleeve 51, preventing pressurized air leakage. The pull rod 65 moves laterally through the piston sleeve at its inner end. The pressurized air is guided to the outside of the piston sleeve through the guide pipe 14, which is movably connected to the piston sleeve. This pushes the piston sleeve laterally and compresses the return spring 66, causing the pull rod 65 to drive the distribution ring 61 to move laterally. The distribution ring 61 pushes the slide plate on the outer side of the clamping sleeve 51, thereby pushing the clamping sleeve 5 to move laterally.

[0049] The air supply assembly 7 includes a main air pump 71, a connecting sleeve 72, a first valve 73, a second valve 74, and an intermediate pipe 75. The connecting sleeve 72 is fixed and connected to the air outlet of the main air pump 71. The first valve 73 is fixedly sleeved in the connecting sleeve 72. The second valve 74 is connected to the first valve 73 through the intermediate pipe 75. The two ends of the connecting sleeve 72 are fixedly connected to two fixed seats 2 and connected to the guide pipe 14.

[0050] The air supply assembly 7 provides pressurized air in different directions to clamp and fix the composite processing assembly 10 and control the lateral movement of the clamping sleeve 5. The guide pipe 14 guides the output airflow of the connecting sleeve 72 to the outside of the piston sleeve.

[0051] The rotating spindle 8 includes a shaft body 81, a connecting cavity 82, an assembly groove 83, a side opening 84, and a second clamping part 85. The shaft body 81 is fixedly sleeved with the drive gear 9. The connecting cavity 82 is opened at the end of the shaft body 81 and extends into the interior. The assembly groove 83 is opened on the outer surface of the shaft body 81. The side opening 84 is opened on the outer side of the shaft body 81 and communicates with the connecting cavity 82. The side opening 84 is located inside the assembly groove 83. The second clamping part 85 is elastically installed in the side opening 84. The second clamping part 85 includes a second clamping plate, a second spring, and a positioning frame. The positioning frame is fixedly sleeved in the side opening 84. One end of the second spring is fixedly connected to the positioning frame, and the other end is fixedly connected to the second clamping plate.

[0052] By utilizing the rotation of the rotating spindle 8, the rotation of the driving gear 9 is driven, and the rotation control of the driven gear 32 is realized. In conjunction with the externally movable composite processing component 10, the power for rotating welding of the pipe fitting is realized on the one hand, and the rotation of the composite processing component 10 is realized synchronously when it is fixed with the rotating spindle 8. A single motor realizes the intermittent grinding of the pipe fitting end and the grinding of the relatively opposite rotation. The second clamping part 85 is driven by internal air pressure and realizes the support, clamping and fixing of the composite processing component 10 from the inside to the outside.

[0053] The movable tube 101 is rotatably sleeved in the assembly groove 83. The area of ​​the grinding disc 103 is larger than the end face area of ​​the pipe to be welded. An arc groove is provided in front of the outer surface of the grinding disc 103, and a positioning hole is provided on the side of the grinding disc 103.

[0054] The composite processing component 10 enables dynamic intermittent end grinding as well as static continuous outer grinding. The arc groove adapts to the outer welding edge of the pipe fitting, improving the grinding effect. The positioning hole facilitates the use of the positioning component 11 to maintain static horizontal fixation.

[0055] The base 1 is fixedly provided with a positioning component 11 on its top. The positioning component 11 includes a vertical plate 111 and a positioning bolt 112. The vertical plate 111 is fixed to the top of the base 1 by a bottom support plate. The positioning bolt 112 is spirally sleeved on the side of the vertical plate 111 and is located on the rotation path of the positioning hole.

[0056] By using the positioning bolts 112 in the positioning component 11, the composite processing component 10, which has been removed from clamping and fixing, can be horizontally clamped and fixed, and the outer surface can be ground in conjunction with the grinding disc 103 after shrinkage and displacement.

[0057] The fixed base 2 has a connecting mechanism 12 on its back. One end of the connecting mechanism 12 is fixedly connected to the second valve 74, and the other end is sleeved on the outer end of the shaft 81 and connected to the connecting cavity 82.

[0058] The connecting mechanism 12 is used to input pressurized air into the rotating main shaft 8. The upper end of the connecting mechanism 12 is a cover and is sleeved on the outside of the end of the shaft 81 to ensure that the internal pressurized air can be continuously input into the connecting cavity 82 under dynamic rotation. Valve 73 controls whether the gas enters the connecting sleeve 72 or the intermediate pipe 75, and valve 74 controls whether the pressurized air input into the intermediate pipe 75 is input into the connecting mechanism 12.

[0059] The working principle and usage process of this invention: Before welding, adjust the position of the composite processing component 10 so that the movable tube 101 rotates around the rotating main shaft 8 to a horizontal state, and start the air supply component 7. Use valve 73 to guide the input pressurized air into the intermediate tube 75, and use valve 74 to input the gas into the connecting mechanism 12, so that the pressurized air is guided into the connecting cavity 82 of the rotating main shaft 8, so that the pressurized air acts on the side port 84 and pushes the second clamping parts 85 distributed on both sides to move, supporting and fixing the outer movable tube 101 from the inside. Then, put the two tent bracket pipes to be welded into the clamping sleeve 5, and keep the front end of the pipe to be welded in the cylinder 31 of the rotating cylinder 3, and keep the front end of the pipe to be welded in contact with the side of the grinding disc 103 in the composite processing component 10. Start the auxiliary air pump 63 in the control component 6, so that the pressurized air supply component 7 is activated. Pressurized air enters the distribution ring 61 through the auxiliary air pipe 64 and is input into the through hole 53 of the clamping sleeve 5 through the ring groove 62. Further pressurized air is input into the corresponding inner groove 52 through the through hole 53 and pushes the elastically connected first clamping part 54 to move laterally. The first clamping part 54, which is distributed around the ring, moves and clamps and fixes the pipe to be welded. The motor is started and drives the rotating spindle 8 to rotate, so that the driving gear 9 drives the driven gear 32 to rotate, so that the rotating cylinder 3 drives the internal clamping sleeve 5 and the fixed pipe to be welded to rotate together. As the ends of the pipes to be welded on both sides rotate on their own, the rotating spindle 8 simultaneously drives the installed and fixed composite processing component 10 to rotate. As the pipes to be welded on both sides rotate on their own, the grinding disc 103 rotates and intermittently passes between the pipes to be welded on both sides to achieve intermittent grinding treatment and complete the pipe end treatment before welding.After the end processing is completed, the pressure air input to the rotating spindle 8 is stopped, the second clamping part 85 is reset, and the electric push rod 102 in the composite processing assembly 10 is activated, causing the grinding disc 103 to retract between the ends of the two pipes. The composite processing assembly 10, now unsecured, naturally swings downwards. The first valve 73 is activated, further inputting the pressure air from the main air pump 71 into the guide pipe 14 in the internal cavity 4. This pushes the piston sleeve on the inner end of the pull rod 65 laterally, causing the pressure air to push the pull rod 65 laterally. The two pull rods 65 move along the clamping sleeves 5 and push the sliding plate, causing the clamping sleeves 5 on both sides to move synchronously and close together. This allows the two sets of end-grinding pipes to approach and fit together synchronously, completing the welding positioning. The electric push rod 102 in the composite processing assembly 10 is activated again. The machine rotates the main shaft 8, causing the rotating cylinder 3 to rotate, which in turn rotates the pipeline. Welding end 13 is activated, moving downwards and approaching the connection point of the two sets of pipelines for welding and fixing. During welding, the composite processing component 10 remains stationary. After welding, welding end 13 is removed, and the composite processing component 10 is adjusted to a horizontal position. The positioning bolt 112 in the positioning component 11 is rotated, fixing the composite processing component 10 in the positioning component 11 and maintaining its horizontal stability. The electric push rod 102 is activated, driving the grinding disc 103 to move horizontally and approach the outside of the welded pipeline. The main shaft 8 is kept rotating, causing the rotating cylinder 3 to rotate. While maintaining the rotation of the welded pipeline, it contacts and grinds the arc-shaped groove of the outer grinding disc 103, achieving the grinding treatment of the outer ring weld after welding.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic welding machine for tent frames, comprising a base (1) and a fixing seat (2) fixed to the top of the base (1), characterized in that: The fixed base (2) is rotatably mounted with a rotating cylinder (3), and a clamping sleeve (5) is slidably mounted inside the rotating cylinder (3). A control component (6) is provided on the outside of the clamping sleeve (5). The control component (6) controls the clamping sleeve (5) to clamp and fix the pipeline to be welded by pressurized air, and controls the clamping sleeve (5) to move laterally. An air supply component (7) is fixedly mounted on the top of the base (1). One air outlet of the air supply component (7) is connected to the inside of the fixed base (2). A rotating spindle (8) is provided on the back of the fixed base (2). A drive gear (9) is sleeved on the outer surface of the rotating spindle (8). A composite processing component (10) is rotatably sleeved on the outer surface of the rotating spindle (8). The drive gear (9) drives the rotating cylinder (3) to rotate. When the composite processing component (10) rotates, it grinds the end of the pipeline to be welded, and when it is fixed, it grinds the outside of the pipeline to be welded. A welding end (13) is fixedly mounted on the top of the fixed base (2). The composite processing assembly (10) includes a movable tube (101) rotatably sleeved on a rotating spindle (8), an electric push rod (102) fixedly installed on the outer side of the movable tube (101), a grinding disc (103) fixed on the free end of the electric push rod (102), and a side disc (104) fixedly sleeved on the outside of the movable tube (101). The clamping sleeve (5) includes a clamping cylinder (51), an inner groove (52), a through hole (53), and a first clamping part (54). The clamping cylinder (51) is movably sleeved in the cylinder body (31). The inner groove (52) is opened inside the clamping cylinder (51) and is distributed at equal intervals around it. The through hole (53) is opened on the outer side of the clamping cylinder (51) and corresponds one-to-one with the inner groove (52). The inner groove (52) and the through hole (53) are connected. The first clamping part (54) is elastically sleeved in the inner groove (52). The first clamping part (54) includes a clamping plate and a spring. One end of the spring is fixedly connected to the clamping plate, and the other end is fixed in the inner groove (52). A sliding plate is fixedly connected to the outer side of the clamping cylinder (51). The sliding plate is slidably sleeved with the sliding groove. The control component (6) includes a distribution ring (61), an annular groove (62), an auxiliary air pump (63), an auxiliary air pipe (64), a pull rod (65), and a return spring (66). The distribution ring (61) is movably sleeved on the outer side of the clamping cylinder (51). The annular groove (62) is opened inside the distribution ring (61) and communicates with the through hole (53). The auxiliary air pump (63) is fixed on the top of the fixed base (2). One end of the auxiliary air pipe (64) is fixedly connected to the air outlet end of the auxiliary air pump (63) and connected to the outlet end of the auxiliary air pump (63). The auxiliary air pipe (64) is fixedly connected to the distribution ring (61) and communicates with the ring groove (62). One end of the pull rod (65) is fixedly connected to the distribution ring (61), and the other end of the pull rod (65) is movably sleeved in the fixed seat (2) and extends into the internal cavity (4). The inner end of the pull rod (65) is provided with a piston sleeve. One end of the return spring (66) is fixed in the internal cavity (4), and the other end is fixedly connected to the piston sleeve. The piston sleeve is movably sleeved with the guide pipe (14). The air supply assembly (7) includes a main air pump (71), a connecting sleeve (72), a first valve (73), a second valve (74), and an intermediate pipe (75). The connecting sleeve (72) is fixed and connected to the air outlet of the main air pump (71). The first valve (73) is fixedly fitted into the connecting sleeve (72). The second valve (74) is connected to the first valve (73) through the intermediate pipe (75). Both ends of the connecting sleeve (72) are fixedly connected to two fixed seats (2) and connected to the guide pipe (14). The rotating spindle (8) includes a shaft body (81), a communicating cavity (82), a mounting groove (83), a side opening (84), and a second clamping part (85). The shaft body (81) is fixedly sleeved with the driving gear (9). The communicating cavity (82) is opened at the end of the shaft body (81) and extends into the interior. The mounting groove (83) is opened on the outer surface of the shaft body (81). The side opening (84) is opened on the outer side of the shaft body (81) and communicates with the communicating cavity (82). The side opening (84) is located inside the mounting groove (83). The second clamping part (85) The first clamping part (85) is elastically installed in the side opening (84). The second clamping part (85) includes a second clamping plate, a second spring and a positioning frame. The positioning frame is fixedly sleeved in the side opening (84). One end of the second spring is fixedly connected to the positioning frame and the other end is fixedly connected to the second clamping plate. The movable tube (101) is rotatably sleeved in the assembly groove (83). The area of ​​the grinding disc (103) is larger than the end face area of ​​the pipeline to be welded. An arc groove is provided in front of the outer surface of the grinding disc (103). A positioning hole is provided on the side of the grinding disc (103).

2. The automatic welding machine for tent frames according to claim 1, characterized in that: The fixed seat (2) has an internal cavity (4) inside. A motor is fixedly mounted on the back of the fixed seat (2). The output shaft of the motor is fixedly connected to the rotating main shaft (8) and drives the rotating main shaft (8) to rotate. The rotating cylinder (3) includes a cylinder body (31) and a driven gear (32). The driven gear (32) is fixedly sleeved on the outer surface of the cylinder body (31) and meshes with the driving gear (9). There are two fixed seats (2) and they are symmetrically distributed on the top of the base (1). The cylinder body (31) corresponds to the fixed seat (2) one by one and is rotatably sleeved inside the fixed seat (2). The inner wall of the cylinder body (31) has a sliding groove. A guide tube (14) is fixedly connected in the internal cavity (4).

3. The automatic welding machine for tent frames according to claim 2, characterized in that: The top of the base (1) is fixedly provided with a positioning component (11). The positioning component (11) includes a vertical plate (111) and a positioning bolt (112). The vertical plate (111) is fixed to the top of the base (1) by a bottom support plate. The positioning bolt (112) is spirally sleeved on the side of the vertical plate (111). The positioning bolt (112) is located on the rotation path of the positioning hole.

4. The automatic welding machine for tent frames according to claim 3, characterized in that: The back of the fixed seat (2) is provided with a communication mechanism (12). One end of the communication mechanism (12) is fixedly connected to the second valve (74), and the other end is sleeved on the outer end of the shaft (81) and connected to the communication cavity (82).

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