Liquefied propane steel cylinder annular welding equipment and method

Abstract

The invention discloses annular welding equipment and method for liquefied propane steel cylinders. The annular welding equipment comprises two linear motors with the ends fixedly connected with each other, a welding assembly is fixedly installed on the top face of the joint of the two linear motors, and two clamping mechanisms are installed at the transmission end of the welding assembly; the welding assembly comprises a first annular radial adjusting mechanism, a bionic welding machine is installed at the radial transmission end above the first annular radial adjusting mechanism, and a plurality of weld joint knocking mechanisms and a plurality of weld joint polishing mechanisms are installed at the radial transmission ends in the two side directions of the first annular radial adjusting mechanism. The two sides of the welding assembly are provided with a bottle body end opening double-groove punching mechanism and an end socket necking mechanism correspondingly. The problem that the welding firmness is poor due to the fact that straight opening butt joint is adopted in traditional liquefied propane steel cylinder welding is solved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a liquefied propane cylinder annular welding device and method. Background Art

[0002] In the liquefied propane cylinder manufacturing industry, the quality of welding technology is directly related to product quality and safety, and its importance is self-evident. For a long time, traditional welding technology has faced many challenges in ensuring the welding strength and stability of liquefied propane cylinders.

[0003] In the traditional process of welding the bottle body and the end cap, although the method of beveling both, then butting the straight ends below the bevel, and welding between the bevels is adopted, there are serious drawbacks. Due to the structural characteristics of the straight butt joint part, it is difficult for the molten liquid to fully and deeply penetrate into the gap of the straight butt joint below the bevel during welding. On the one hand, the narrow space at the straight butt joint forms a great obstacle to the flow of the molten liquid, resulting in a large number of tiny gaps that cannot be fully filled by the molten liquid, resulting in many unfused areas inside the weld. According to professional testing equipment, the proportion of unfused defects in the straight butt joint area of ​​the weld welded by this kind of traditional process can reach 10%-15% of the total volume of the weld. These unfused parts seriously weaken the effective bearing area of ​​the weld, making it very easy for the welded joint to rupture from these weak points when under pressure, greatly reducing the overall strength and safety of the liquefied propane cylinder.

[0004] From the perspective of stress distribution, when traditional welded structures are subjected to stress, the stress concentration problem at the straight joint is extremely prominent. Due to the lack of scientific and reasonable structural design to evenly disperse stress, when the high-pressure propane gas stored inside the liquefied propane cylinder exerts pressure on the weld, the stress concentration coefficient in the straight joint area can be as high as 2-3 times that of the normal part. When in this high stress concentration state for a long time, the weld is very likely to crack, and the crack will start from the straight joint and quickly expand to the surrounding area, eventually leading to complete failure of the weld and causing serious safety accidents. According to incomplete statistics in the industry, among the safety accidents of liquefied propane cylinders caused by welding quality problems, about 65% are caused by stress concentration at the straight joint causing weld cracking.

[0005] In addition, traditional welding processes require extremely high operating precision. Whether it is the groove processing accuracy of the bottle body and the head, or the assembly accuracy when the straight mouth is connected, if the manual operation is not careful, there will be problems such as uneven groove gap and wrong straight edge. These deviations not only make it difficult for the molten liquid to cover evenly during the filling process, further exacerbating the occurrence of unfused defects, but also seriously affect the overall quality and stability of the weld. Even if automated welding equipment is used, due to the inherent limitations of the traditional process itself, it is difficult for the equipment to effectively optimize and accurately control the welding process, and it is impossible to fundamentally solve the problem of insufficient molten liquid filling and stress concentration.

[0006] With the continuous improvement of the safety and reliability requirements of liquefied propane cylinders in modern industrial production and the increasingly stringent relevant safety standards, traditional welding processes have been unable to meet the needs of industry development. It is urgent to develop a liquefied propane cylinder annular welding device and method to meet the needs. Summary of the invention

[0007] In order to solve the problem that the conventional straight butt welding of liquefied propane cylinders results in poor welding firmness, the object of the present invention is to provide a liquefied propane cylinder annular welding device and method.

[0008] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a liquefied propane cylinder annular welding device, comprising two linear motors whose ends are fixedly connected to each other, a welding assembly is fixedly installed on the top surface of the connection between the two linear motors, and two clamping mechanisms are installed on the transmission end thereof;

[0009] The welding assembly includes a first annular radial adjustment mechanism, a bionic welding machine is installed on the radial transmission end above the first annular radial adjustment mechanism, and a plurality of weld seam knocking mechanisms and a plurality of weld seam grinding mechanisms are installed on the radial transmission ends on both sides thereof; a double groove mechanism for the bottle body port and a head shrinking mechanism are respectively installed on both sides of the welding assembly;

[0010] The clamping mechanism comprises a second annular radial adjustment mechanism, and a plurality of radial transmission ends of the second annular radial adjustment mechanism are provided with a plurality of clamping rollers, one of which is driven by the first motor.

[0011] Preferably, the first annular radial adjustment mechanism includes a first vertical plate fixedly mounted on the top surface of the connection between the two linear motors, the side wall of the first vertical plate is fixedly connected to the first circular ring, the outer wall of the first circular ring is rotatably sleeved with the first ring, the inner wall of the first ring is fixedly sleeved with the second circular ring, the end surface of the first circular ring located inside the first circular ring is fixedly provided with a plurality of first guide grooves, the inner wall of the first guide groove is slidably connected with the first transmission block, the first transmission block transmits in the radial direction of the first circular ring, the side wall of the first transmission block is fixedly connected with the first cylinder, one side end surface of the second circular ring is slidably connected to the side wall of the first transmission block, the second circular ring is provided with a plurality of first strip holes, the first strip holes are inclined relative to the radial direction of the second circular ring, the outer wall above the first ring is provided with first teeth, the second motor is fixedly mounted on the first circular ring, and the output end shaft of the second motor is connected to the first gear meshing with the first teeth.

[0012] Preferably, the bionic welding machine includes a first mounting block fixedly connected to the first transmission block, a U-shaped block is fixedly connected to the side wall of the first mounting block, the inner wall of the U-shaped block is rotatably connected to a movable block through a pin shaft, a second welding gun is fixedly installed on the bottom of the movable block, a rectangular block is fixedly connected to the top of the movable block, a straight slot is vertically opened on the rectangular block, a third motor is fixedly installed on the first mounting block, the output end shaft of the third motor is connected to a driving disk, the end face of the driving disk is eccentrically fixedly connected to a driving shaft, and the driving shaft is slidably connected to the inner wall of the straight slot.

[0013] Preferably, the weld knocking mechanism includes a support block fixedly mounted on the first transmission block, a shell fixedly mounted on the support block, an opening being provided at the bottom of the shell, and a rotating shaft being rotatably inserted into the inner wall of the opening; a knocking rod is fixedly inserted into the outer wall of the rotating shaft located inside the shell, and a torsion spring is sleeved on the outer wall of the rotating shaft located outside the shell, and the two ends of the torsion spring are respectively fixedly connected to the outer wall of the rotating shaft and the side wall of the shell, a fourth motor is fixedly mounted on the side wall of the shell, and the output end shaft of the fourth motor is axially connected to a circular block fixedly sleeved on the outer wall arranged inside the shell, and a plurality of rectangular pressure blocks are fixedly connected to the outer wall of the circular block, and the rectangular pressure block presses down the end of the knocking rod by rotation, and the torsion spring is used to provide torque to the return of the knocking rod, so as to realize the bottom end of the knocking rod knocking the weld, thereby removing the weld skin.

[0014] Preferably, the weld grinding mechanism includes a second mounting block fixedly mounted on the first transmission block, the side wall of the second mounting block is fixedly connected with two symmetrically arranged connecting blocks, the side wall between the two connecting blocks is fixedly connected with two guide rods, the outer walls of the two guide rods are slidably penetrated with L-shaped blocks, springs are sleeved on the outer walls of the guide rods, the two ends of the springs are respectively pressed against the L-shaped block and the connecting block, a fifth motor is fixedly mounted on the L-shaped block, and the output end shaft of the fifth motor is connected with a grinding wheel for grinding the weld.

[0015] Preferably, the double-bevel mechanism for the bottle body port includes a first electric push rod fixedly mounted on a first circular ring, the first electric push rod transmits in the radial direction of the first circular ring, and a first L-shaped plate is fixedly connected to its transmission end; a sixth motor is fixedly mounted on the first L-shaped plate, and a tool rod is fixedly connected to the output end of the sixth motor; a plurality of V-shaped cutters are fixedly connected to the outer wall of the tool rod, and the V-shaped cutters are arranged at a right angle to achieve double-bevel cutting of the gas cylinder port.

[0016] Preferably, the head shrinking mechanism includes a right-angle block fixedly mounted on the first vertical plate, a second electric push rod fixedly mounted on the right-angle block, the second electric push rod transmits in the vertical direction, and its transmission end is fixedly connected to a strip block; a transmission shaft is rotatably connected to the side wall of the strip block close to the top, and the two ends of the transmission shaft are respectively fixedly connected to the second gear and the inner shrinking wheel; a rectangular hole is opened on the side wall of the strip block, a slider is slidably connected to the inner wall of the rectangular hole, the side wall of the slider is rotatably connected to the transmission shaft, and the two ends of the transmission shaft are respectively fixedly connected to the third gear and the outer shrinking wheel; a hydraulic cylinder is fixedly connected to the bottom of the strip block, and the hydraulic cylinder The telescopic end of the pressure cylinder is fixedly connected to the slider, and a sleeve is also fixedly installed on the telescopic end of the second electric push rod. A lifting rod is slidably sleeved on the inner wall of the sleeve, and a seventh motor is fixedly installed on the top of the lifting rod. The output end of the seventh motor is axially connected to one end of the third gear. The inner shrinking wheel and the outer shrinking wheel are located on the same side. The inner shrinking wheel is arranged in two sections of columns, and the diameter of a section of the column close to the strip block is smaller than the diameter of the other section of the column, and the connection between the two sections of the column is set at a chamfered angle; the outer shrinking wheel is also arranged in two sections of columns, and the diameter of a section of the column head close to the slider is larger than the diameter of the other section of the column, and the connection between the two sections of the column is set at a chamfered angle.

[0017] Preferably, the second annular radial adjustment mechanism includes a second vertical plate fixedly mounted on the top surface of the linear motor transmission platform, a third ring is fixedly connected to the side wall of the second vertical plate, a second ring is rotatably sleeved on the outer wall of the third ring, a fourth ring is fixedly sleeved on the inner wall of the second ring, a plurality of second guide grooves are fixedly provided on the end surface of the third ring located inside the second ring, a second transmission block is slidably connected to the inner wall of the second guide groove, the second transmission block transmits in the radial direction of the third ring, a second cylinder is fixedly connected to the side wall of the second transmission block, and a fourth ring One end face is slidably connected to the side wall of the second transmission block, a plurality of second strip holes are provided on the fourth ring, the second strip holes are inclined relative to the radial direction of the fourth ring, a second tooth is provided on the outer wall above the second ring, an eighth motor is fixedly mounted on the third ring, the output end of the eighth motor is axially connected to the fourth gear meshing with the second tooth, a U-shaped frame is fixedly mounted on the second transmission block, the clamping roller is rotatably mounted on the inner wall of the U-shaped frame through a pin shaft, the first motor is fixedly mounted on the U-shaped frame, and the output end of the first motor is axially connected to one end of the clamping roller.

[0018] A liquefied propane cylinder welding method comprises the following steps:

[0019] S1, placing the body and the head of the liquefied propane cylinder in two clamping mechanisms respectively, and the second annular radial adjustment mechanism drives a plurality of clamping rollers to tighten the body and the head of the liquefied propane cylinder respectively;

[0020] S2, two linear motors drive their respective clamping mechanisms to move toward the welding assembly;

[0021] S3, the head is subjected to shrinking processing near the head shrinking mechanism, and at the same time, the body of the liquefied propane cylinder is subjected to double beveling processing near the body port of the bottle, and the port of the liquefied propane cylinder is subjected to double beveling processing;

[0022] S4, after the double groove processing of the head shrinkage and the bottle body port is completed, the two clamping mechanisms move toward each other to insert the head shrinkage into the inner wall at the bottle body port;

[0023] S5, the first motors in the two clamping mechanisms synchronously drive the clamping rollers to rotate, so that the end cap and the bottle body rotate synchronously, the first annular radial adjustment mechanism drives the bionic welding machine, the weld striking mechanism and the weld grinding mechanism to move toward the position of the weld, the welding wire in the bionic welding machine enters the weld, the striking end of the weld striking mechanism is pressed tightly in the weld, and the grinding end of the weld grinding mechanism enters the weld;

[0024] S6, the bionic welding machine is turned on, and the hand-cranked welding machine is swung to simulate the welder, so that the welding wire swings synchronously in the weld, and the welding wire melts in the weld to weld it, and at the same time, the weld percussion mechanism continuously percusses the weld to generate percussion vibration on the head and the bottle body, and the vibration makes the molten liquid fill the groove gap below;

[0025] S7, the head and the bottle body continue to rotate, the molten liquid solidifies, and the weld tapping mechanism continues to tap the weld to knock off the weld skin and residue generated in the weld;

[0026] S8, the head and the bottle body continue to rotate, and the weld grinding mechanism grinds and polishes the weld after the weld skin falls off.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention integrates multiple key processes such as head shrinking, double groove punching of bottle body port, welding, weld knocking cleaning and grinding, as well as positioning of bottle body and head. The various mechanisms work together to greatly shorten the processing cycle of a single gas cylinder and greatly improve production efficiency.

[0029] 2. The present invention uses a bionic welding machine to simulate the swinging of a welder's hand-cranked welding machine, so that the welding wire swings evenly in the weld, ensuring that the weld metal is evenly distributed, enhancing the strength and density of the weld, and improving the quality of the weld joint.

[0030] 3. In the present invention, during the welding process, the weld tapping mechanism works synchronously to tap the weld in time to remove the weld skin, and at the same time, utilizes vibration to enable the molten metal to better fill the groove gap and optimize the internal structure of the weld. After the welding is completed, the weld grinding mechanism polishes the weld to improve the surface quality of the weld, enhance the overall corrosion resistance and aesthetics of the gas cylinder, and ensure the safe use performance of the gas cylinder.

[0031] 4. The present invention adopts double grooves and constrictions as the welding molten pool. The molten liquid fills the groove gap. After solidification, the groove is equivalent to being inserted into the solidified solder. At the same time, the solder is fused with the upper groove, the lower groove and the constriction, which greatly increases the fusion area and thus greatly improves the firmness. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the welding assembly of the present invention;

[0035] Figure 3 It is a schematic structural diagram of the rear side of the welding assembly of the present invention;

[0036] Figure 4 It is a structural schematic diagram of a first annular radial adjustment mechanism of the present invention;

[0037] Figure 5 It is a structural schematic diagram of the bionic welding machine of the present invention;

[0038] Figure 6 It is a structural schematic diagram of the weld tapping mechanism of the present invention;

[0039] Figure 7 It is a structural schematic diagram of the weld grinding mechanism of the present invention;

[0040] Figure 8 It is a structural schematic diagram of a double-groove mechanism for a bottle body port of the present invention;

[0041] Fig. 9 It is a structural schematic diagram of the head shrinking mechanism of the present invention;

[0042] Fig.10 is a schematic structural diagram of a second annular radial adjustment mechanism of the present invention;

[0043] Fig.11 It is a schematic diagram of the connection between the liquefied propane cylinder and the end cap of the present invention.

[0044] In the figure: 1, linear motor; 2, welding assembly; 3, clamping mechanism; 21, first annular radial adjustment mechanism; 22, weld tapping mechanism; 23, weld grinding mechanism; 24, double groove mechanism for bottle body port; 25, head shrinking mechanism; 26, bionic welding machine; 31, second annular radial adjustment mechanism; 32, clamping roller; 33, first motor; 2101, first vertical plate; 2102, first circular ring; 2103, first sleeve ring; 2104, second circular ring; 2105, first guide groove; 2106, first transmission block; 2107, first a column; 2108, a first strip hole; 2109, a first tooth; 2110, a second motor; 2111, a first gear; 2601, a first mounting block; 2602, a U-shaped block; 2603, a movable block; 2604, a second welding gun; 2605, a rectangular block; 2606, a straight notch; 2607, a third motor; 2608, a driving plate; 2609, a driving shaft; 2201, a supporting block; 2202, a housing; 2203, a rotating shaft; 2204, a knocking rod; 2205, a torsion spring; 2206, a fourth motor; 2207, Circular block; 2208, rectangular pressure block; 2301, second mounting block; 2302, connecting block; 2303, guide rod; 2304, L-shaped block; 2305, spring; 2306, grinding wheel; 2307, fifth motor; 2401, first electric push rod; 2402, first L-shaped plate; 2403, sixth motor; 2404, tool rod; 2405, V-mouth tool; 2501, right-angle block; 2502, second electric push rod; 2503, strip block; 2504, second gear; 2505, inner shrinking wheel; 2506, rectangular hole; 2507, slider; 2508, third gear; 2509, outer shrinking wheel; 2510, hydraulic cylinder; 2511, sleeve; 2512, lifting rod; 2513, seventh motor; 3101, second vertical plate; 3102, third circular ring; 3103, second sleeve ring; 3104, fourth circular ring; 3105, second guide groove; 3106, second transmission block; 3107, second column; 3108, second strip hole; 3109, second tooth; 3110, eighth motor; 3111, fourth gear; 3112, U-shaped frame. DETAILED DESCRIPTION

[0045] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0046] See also Figures 1 to 11. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0047] The present invention provides a technical solution: a liquefied propane cylinder annular welding device, which is mainly composed of a linear motor 1 with two ends fixedly connected, a welding assembly 2 and two clamping mechanisms 3. The two linear motors 1 provide power for linear movement of the device, the welding assembly 2 is fixedly installed on the top surface of the connection, and two clamping mechanisms 3 are installed on the transmission end.

[0048] The first annular radial adjustment mechanism 21 includes a first vertical plate 2101 fixedly mounted on the top surface of the connection between the two linear motors 1. The side wall of the first vertical plate 2101 is fixedly connected with a first circular ring 2102, the outer wall of the first circular ring 2102 is rotatably sleeved with a first sleeve ring 2103, and the inner wall of the first sleeve ring 2103 is fixedly sleeved with a second circular ring 2104. The end surface of the first circular ring 2102 located inside the first sleeve ring 2103 is fixedly provided with a plurality of first guide grooves 2105, and the inner wall of the first guide groove 2105 is slidably connected with a first transmission block 2106, and the first transmission block 2106 can transmit in the radial direction of the first circular ring 2102. The side wall of the first transmission block 2106 is fixedly connected with a first cylinder 2107, one side end surface of the second ring 2104 is slidably connected with the side wall of the first transmission block 2106, and the second ring 2104 is provided with a plurality of first strip holes 2108, which are inclined relative to the radial direction of the second ring 2104. The outer wall above the first sleeve 2103 is provided with a first tooth 2109, and the first ring 2102 is fixedly mounted with a second motor 2110, and the output end of the second motor 2110 is connected to a first gear 2111 meshing with the first tooth 2109.

[0049] When the second motor 2110 is started, its output shaft drives the first gear 2111 to rotate. Since the first gear 2111 is meshed with the first tooth 2109, the first ring 2103 is driven to rotate around the first ring 2102. When the first ring 2103 rotates, it drives the second ring 2104 fixedly connected thereto to rotate synchronously. At this time, the first bar hole 2108 rotates with the second ring 2104. Since the first bar hole 2108 is radially inclined relative to the second ring 2104, it drives the first cylinder 2107 to slide on its inner wall. The first cylinder 2107 is fixedly connected to the first transmission block 2106, so that the first transmission block 2106 moves radially along the first ring 2102 in the first guide groove 2105, and the transmission of the first transmission block 2106 is realized, so that the radial position of the relevant components installed on the first transmission block 2106 can be adjusted.

[0050] The bionic welding machine 26 includes a first mounting block 2601 fixedly connected to the first transmission block 2106, a U-shaped block 2602 is fixedly connected to the side wall of the first mounting block 2601, a movable block 2603 is rotatably connected to the inner wall of the U-shaped block 2602 through a pin shaft, a second welding gun 2604 is fixedly installed at the bottom of the movable block 2603, a rectangular block 2605 is fixedly connected to the top of the movable block 2603, a straight slot 2606 is vertically opened on the rectangular block 2605, a third motor 2607 is fixedly installed on the first mounting block 2601, an output end shaft of the third motor 2607 is connected to a driving disk 2608, an end face of the driving disk 2608 is eccentrically fixedly connected to a driving shaft 2609, and the driving shaft 2609 is slidably connected to the inner wall of the straight slot 2606.

[0051] After the third motor 2607 is started, its output shaft drives the driving disk 2608 to rotate. Since the driving shaft 2609 is eccentrically fixed on the end face of the driving disk 2608, when the driving disk 2608 rotates, the driving shaft 2609 will move in a circular track. At the same time, the driving shaft 2609 slides in the straight notch 2606. This sliding and the rotation of the driving disk 2608 work together to drive the movable block 2603 to swing around the pin on the U-shaped block 2602. The two-protection welding gun 2604 installed at the bottom of the movable block 2603 swings accordingly, thereby simulating the swinging action of the welder's hand-cranked welding machine, so that the welding wire can swing synchronously in the weld, achieving a more uniform and high-quality welding effect.

[0052] The weld knocking mechanism 22 comprises a support block 2201 fixedly mounted on the first transmission block 2106, a housing 2202 fixedly mounted on the support block 2201, an opening being provided at the bottom of the housing 2202, and a rotating shaft 2203 being rotatably connected to the inner wall of the opening. A knocking rod 2204 is fixedly connected to the outer wall of the rotating shaft 2203 located inside the housing 2202, and a torsion spring 2205 is sleeved on the outer wall of the rotating shaft 2203 located outside the housing 2202, and the two ends of the torsion spring 2205 are respectively fixedly connected to the outer wall of the rotating shaft 2203 and the side wall of the housing 2202. A fourth motor 2206 is fixedly mounted on the side wall of the housing 2202, and the output end of the fourth motor 2206 is axially connected to the outer wall of the housing 2202, and a circular block 2207 is fixedly sleeved thereon, and a plurality of rectangular pressing blocks 2208 are fixedly connected to the outer wall of the circular block 2207.

[0053] After the fourth motor 2206 is started, the circular block 2207 is driven to rotate. As the circular block 2207 rotates, the rectangular pressing block 2208 thereon also rotates. When the rectangular pressing block 2208 rotates to contact the end of the knocking rod 2204, the end of the knocking rod 2204 is pressed down, causing the knocking rod 2204 to rotate around the rotating shaft 2203, and the bottom end thereof knocks the weld. After the rectangular pressing block 2208 leaves the end of the knocking rod 2204, the torsion spring 2205 releases the torsion force, driving the knocking rod 2204 to return to its position, ready for the next knock. In this way, the weld is continuously knocked to remove the weld skin generated during the welding process.

[0054] The weld grinding mechanism 23 includes a second mounting block 2301 fixedly mounted on the first transmission block 2106, the side wall of the second mounting block 2301 is fixedly connected with two symmetrically arranged connecting blocks 2302, the side wall between the two connecting blocks 2302 is fixedly connected with two guide rods 2303, the outer walls of the two guide rods 2303 are slidably connected with L-shaped blocks 2304, the outer walls of the guide rods 2303 are sleeved with springs 2305, and the two ends of the spring 2305 are respectively pressed against the L-shaped blocks 2304 and the connecting blocks 2302. A fifth motor 2307 is fixedly mounted on the L-shaped block 2304, and a grinding wheel 2306 is axially connected to the output end of the fifth motor 2307.

[0055] When the weld needs to be polished, the fifth motor 2307 is started to drive the polishing wheel 2306 to rotate. Since the L-shaped block 2304 is connected to the connecting block 2302 through the spring 2305 and can slide on the guide rod 2303, during the polishing process, the elastic force of the spring 2305 can keep the polishing wheel 2306 close to the weld surface. As the equipment runs, the polishing wheel 2306 polishes the weld to make the weld surface flat and smooth.

[0056] The double beveling mechanism 24 for the bottle end includes a first electric push rod 2401 fixedly mounted on the first circular ring 2102. The first electric push rod 2401 transmits in the radial direction of the first circular ring 2102, and its transmission end is fixedly connected to the first L-shaped plate 2402. A sixth motor 2403 is fixedly mounted on the first L-shaped plate 2402, and a tool rod 2404 is fixedly connected to the output end of the sixth motor 2403. A plurality of V-shaped tools 2405 are fixedly connected to the outer wall of the tool rod 2404, and the V-shaped tool is arranged at a right angle.

[0057] When the port of the liquefied propane cylinder needs to be double-grooved, the cylinder rotates, the first electric push rod 2401 starts, and pushes the first L-shaped plate 2402 and the components mounted thereon to approach the port of the cylinder along the radial direction of the first ring 2102. The sixth motor 2403 starts, driving the tool rod 2404 to rotate, and the V-mouth tool 2405 thereon rotates accordingly. Since the V-mouth of the V-mouth tool 2405 is set at a right angle, the V-mouth tool 2405 cuts the port of the cylinder during the rotation of the tool rod 2404, thereby realizing the double-grooved processing of the port of the cylinder.

[0058] The end-sealing and shrinking mechanism 25 comprises a right-angle block 2501 fixedly mounted on the first vertical plate 2101, a second electric push rod 2502 fixedly mounted on the right-angle block 2501, the second electric push rod 2502 performs transmission in the vertical direction, and a strip block 2503 is fixedly connected to its transmission end. A transmission shaft is rotatably connected to the side wall of the strip block 2503 near the top, and a second gear 2504 and an inner shrinking wheel 2505 are respectively fixedly connected to the two ends of the transmission shaft. A rectangular hole 2506 is opened on the side wall of the strip block 2503, a slider 2507 is slidably connected to the inner wall of the rectangular hole 2506, a transmission shaft is rotatably connected to the side wall of the slider 2507, and a third gear 2508 and an outer shrinking wheel 2509 are respectively fixedly connected to the two ends of the transmission shaft. A hydraulic cylinder 2510 is fixedly connected to the bottom of the strip block 2503, and the telescopic end of the hydraulic cylinder 2510 is fixedly connected to the slider 2507. A sleeve 2511 is fixedly mounted on the telescopic end of the second electric push rod 2502, and a lifting rod 2512 is slidably sleeved on the inner wall of the sleeve 2511. A seventh motor 2513 is fixedly mounted on the top of the lifting rod 2512, and the output end of the seventh motor 2513 is axially connected to one end of the third gear 2508. The inner shrinking wheel 2505 and the outer shrinking wheel 2509 are located on the same side. The inner shrinking wheel 2505 is set as two sections of cylinders, and the diameter of the cylinder section close to the bar block 2503 is smaller than the diameter of the other cylinder section, and the connection between the two cylinder sections is set at a chamfered angle; the outer shrinking wheel 2509 is also set as two sections of cylinders, and the diameter of the column head of a section close to the slider 2507 is larger than the diameter of the other cylinder section, and the connection between the two cylinder sections is set at a chamfered angle.

[0059] First, insert the sealing port that needs to be shrunken between the inner shrinking wheel 2505 and the outer shrinking wheel 2509. At this time, the inner shrinking wheel 2505 is against the inner wall of the sealing port. Then, the hydraulic cylinder 2510 is started to drive the slider 2507 to move upward, so that the outer shrinking wheel 2509 is pressed against the outer wall of the sealing port, and the sealing port is deformed under the action of the inner and outer wheels. As the slider 2507 rises, the third gear 2508 rises and meshes with the second gear 2504. At the same time, the lifting rod 2512 rises in the sleeve 2511. The seventh motor 2513 is started to drive the third gear 2508 to rotate. Since the third gear 2508 is meshed with the second gear 2504, the second gear 2504 is driven, thereby driving the inner shrinking wheel 2505 and the outer shrinking wheel 2509 to rotate synchronously. During the rotation process, the port of the end cap is subjected to the necking process by utilizing the special two-stage column structure and the chamfered angle setting of the inner necking wheel 2505 and the outer necking wheel 2509. During the necking process, the first motors 33 in the two clamping mechanisms 3 synchronously drive the clamping rollers 32 to rotate, so that the end cap and the bottle body rotate synchronously to ensure the uniformity of the necking process.

[0060] The second annular radial adjustment mechanism 31 includes a second vertical plate 3101 fixedly mounted on the top surface of the transmission platform of the linear motor 1, a third circular ring 3102 is fixedly connected to the side wall of the second vertical plate 3101, a second sleeve ring 3103 is rotatably sleeved on the outer wall of the third circular ring 3102, and a fourth circular ring 3104 is fixedly sleeved on the inner wall of the second sleeve ring 3103. A plurality of second guide grooves 3105 are fixedly provided on the end surface of the third circular ring 3102 located inside the second sleeve ring 3103, a second transmission block 3106 is slidably connected to the inner wall of the second guide groove 3105, and the second transmission block 3106 transmits in the radial direction of the third circular ring 3102. The side wall of the second transmission block 3106 is fixedly connected with a second cylinder 3107, one side end surface of the fourth ring 3104 is slidably connected with the side wall of the second transmission block 3106, and a plurality of second strip holes 3108 are provided on the fourth ring 3104, and the second strip holes 3108 are inclined relative to the radial direction of the fourth ring 3104. The outer wall above the second ring 3103 is provided with a second tooth 3109, and the third ring 3102 is fixedly installed with an eighth motor 3110, and the output end of the eighth motor 3110 is axially connected with a fourth gear 3111 meshing with the second tooth 3109. A U-shaped frame 3112 is fixedly installed on the second transmission block 3106, and the clamping roller 32 is rotatably installed on the inner wall of the U-shaped frame 3112 through a pin shaft, and the first motor 33 is fixedly installed on the U-shaped frame 3112, and the output end of the first motor 33 is axially connected with one end of the clamping roller 32.

[0061] After the eighth motor 3110 is started, its output shaft drives the fourth gear 3111 to rotate, and the fourth gear 3111 meshes with the second tooth 3109, thereby driving the second ring 3103 to rotate around the third ring 3102. When the second ring 3103 rotates, it drives the fourth ring 3104 fixedly connected thereto to rotate synchronously. The second strip hole 3108 rotates with the fourth ring 3104, and since it is radially inclined relative to the fourth ring 3104, it drives the second cylinder 3107 to slide on its inner wall. The second cylinder 3107 is fixedly connected to the second transmission block 3106, so that the second transmission block 3106 moves radially along the third ring 3102 in the second guide groove 3105, thereby realizing the transmission of the second transmission block 3106. Multiple second transmission blocks 3106 move synchronously, so that a plurality of clamping rollers 32 installed in the U-shaped frame 3112 thereon perform synchronous tightening action, so that the body or the end cap of the liquefied propane cylinder can be stably clamped. During the welding process, the first motor 33 is started to drive the clamping roller 32 to rotate, thereby driving the clamped bottle body or bottle head to rotate.

[0062] Welding method implementation steps:

[0063] Workpiece clamping:

[0064] First, the body and the end cap of the liquefied propane cylinder are placed in the two clamping mechanisms 3 respectively. The eighth motor 3110 in the second annular radial adjustment mechanism 31 is started, and the second sleeve ring 3103 is driven to rotate through the meshing transmission of the fourth gear 3111 and the second tooth 3109, thereby driving the fourth circular ring 3104 to rotate. Under the interaction of the second strip hole 3108 and the second cylinder 3107, the second transmission block 3106 moves in the second guide groove 3105 along the radial direction of the third circular ring 3102, so that the plurality of clamping rollers 32 tighten and fix the body and the end cap of the liquefied propane cylinder respectively, ensuring the stability of the workpiece during the subsequent processing.

[0065] Device mobile positioning:

[0066] The two linear motors 1 are started to drive the clamping mechanisms 3 on their respective transmission ends to move toward the welding assembly 2. During the movement, the bottle body and the head are accurately moved to the corresponding processing positions of the welding assembly 2 by controlling the stroke and speed of the linear motor 1, so as to prepare for subsequent processing operations.

[0067] Double groove processing of the end cap shrinkage and the bottle body port:

[0068] Head shrinking process: When the head moves to a position close to the head shrinking mechanism 25, the second electric push rod 2502 starts, pushing the strip block 2503 and the components installed thereon to move downward, so that the inner shrinking wheel 2505 and the outer shrinking wheel 2509 are close to the head port. The head port is inserted between the inner shrinking wheel 2505 and the outer shrinking wheel 2509, and the inner shrinking wheel 2505 is close to the inner wall of the sealing port. Then, the hydraulic cylinder 2510 starts, driving the slider 2507 to move upward, and the outer shrinking wheel 2509 is pressed against the outer wall of the sealing port, causing the head port to deform. At the same time, the third gear 2508 rises and meshes with the second gear 2504, and the lifting rod 2512 rises in the sleeve 2511. The seventh motor 2513 is started, driving the third gear 2508 to rotate, the second gear 2504 is driven, and the inner shrinking wheel 2505 and the outer shrinking wheel 2509 rotate synchronously to shrink the port of the head. During the shrinking process, the first motors 33 in the two clamping mechanisms 3 synchronously drive the clamping rollers 32 to rotate, so that the head rotates synchronously to ensure the uniformity of the shrinking process.

[0069] Double groove processing of the bottle body port: While the end cap is being processed, the liquefied propane cylinder body is moved to a position close to the double groove mechanism 24 of the bottle body port. The first electric push rod 2401 is started, pushing the first L-shaped plate 2402 and the components mounted thereon to approach the bottle body port along the radial direction of the first ring 2102. The sixth motor 2403 is started, driving the tool rod 2404 to rotate, and the V-mouth tool 2405 on the tool rod 2404 cuts the bottle body port to achieve the double groove processing of the cylinder port. During the processing, the precision and quality of the double groove processing are ensured by controlling the propulsion speed of the first electric push rod 2401 and the rotation speed of the sixth motor 2403.

[0070] Workpiece docking:

[0071] After the double groove processing of the head necking and the bottle body port is completed, the two linear motors 1 drive the clamping mechanism 3 to move towards each other again, inserting the necked head into the inner wall of the bottle body port, so that the two are accurately docked, creating good conditions for the subsequent welding process. During the docking process, the movement amount of the linear motor 1 is fine-tuned to ensure that the matching accuracy of the head and the bottle body port meets the welding requirements.

[0072] Preparation before welding:

[0073] The first motors 33 in the two clamping mechanisms 3 are started synchronously, driving the clamping rollers 32 to rotate, thereby driving the closure head and the bottle body to rotate synchronously. At the same time, the second motor 2110 in the first annular radial adjustment mechanism 21 is started, and the first ring 2103 is driven to rotate through the meshing transmission of the first gear 2111 and the first tooth 2109, thereby driving the second ring 2104 to rotate. Under the interaction of the first strip hole 2108 and the first column 2107, the first transmission block 2106 moves radially along the first ring 2102 in the first guide groove 2105, so that the bionic welding machine 26, the weld tapping mechanism 22 and the weld grinding mechanism 23 move toward the position of the weld. After moving to the appropriate position, the welding wire of the double-protection welding gun 2604 in the bionic welding machine 26 enters the weld, the bottom end of the knocking rod 2204 of the weld knocking mechanism 22 is pressed tightly in the weld, and the grinding wheel 2306 of the weld grinding mechanism 23 enters the weld, completing the preparation work before welding.

[0074] Welding process:

[0075] The third motor 2607 in the bionic welding machine 26 is started, the drive disk 2608 rotates, and the drive shaft 2609 slides in the straight slot 2606 while running in a circular trajectory, thereby driving the movable block 2603 to swing, so that the two-guard welding gun 2604 swings, simulating the swinging action of the welder's hand-cranked welding machine, and the welding wire swings synchronously in the weld. During the swinging process, the welding wire melts in the weld under the action of current and gas protection, and welds the joint between the head and the bottle body. During the welding process, the welding quality is ensured by controlling the rotation speed and swing amplitude of the third motor 2607, as well as the wire feeding speed and welding current of the two-guard welding gun 2604.

[0076] Weld tapping treatment:

[0077] While welding, the fourth motor 2206 in the weld tapping mechanism 22 is started, driving the circular block 2207 to rotate, and the rectangular pressing block 2208 presses down the end of the tapping rod 2204 as the circular block 2207 rotates, so that the tapping rod 2204 rotates around the rotating shaft 2203, and its bottom end continuously taps the weld. During the tapping process, the torsion spring 2205 provides torque for the return of the tapping rod 2204. The continuous tapping of the weld tapping mechanism 22 can, on the one hand, remove the weld skin generated during the welding process, and on the other hand, produce tapping vibrations to the end cap and the bottle body, so that the molten metal can better fill the groove gap below, thereby improving the quality and strength of the weld. By controlling the rotation speed of the fourth motor 2206, the frequency and intensity of the tapping can be adjusted to meet different welding process requirements.

[0078] Weld grinding treatment:

[0079] The end cap and the bottle body continue to rotate. As the welding progresses and the weld tapping mechanism 22 cleans the weld skin, the weld grinding mechanism 23 starts to work. The fifth motor 2307 in the weld grinding mechanism 23 is started, driving the grinding wheel 2306 to rotate. Since the L-shaped block 2304 is connected to the connecting block 2302 through the spring 2305 and can slide on the guide rod 2303, the elastic force of the spring 2305 keeps the grinding wheel 2306 close to the weld surface. During the operation of the equipment, the grinding wheel 2306 grinds and polishes the weld after the weld skin falls off, making the weld surface flat and smooth to meet the specified surface quality requirements. The grinding effect is ensured by controlling the rotation speed of the fifth motor 2307 and the feed amount of the grinding wheel 2306, which is indirectly controlled by the overall operating speed of the equipment.

[0080] Through the above series of specific implementation steps, the annular welding equipment of the liquefied propane cylinder of the present invention can be used to efficiently and high-quality complete the annular welding work of the liquefied propane cylinder, meet production needs, and improve production efficiency and product quality.

[0081] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A liquefied propane cylinder annular welding device, comprising two linear motors (1) whose ends are fixedly connected to each other, characterized in that: A welding assembly (2) is fixedly installed on the top surface of the connection between the two linear motors (1), and two clamping mechanisms (3) are installed on the transmission ends thereof; The welding assembly (2) comprises a first annular radial adjustment mechanism (21), a bionic welding machine (26) is installed on the radial transmission end above the first annular radial adjustment mechanism (21), and a plurality of weld seam striking mechanisms (22) and a plurality of weld seam grinding mechanisms (23) are installed on the radial transmission ends on both sides thereof; a bottle body port double groove punching mechanism (24) and a head shrinking mechanism (25) are respectively installed on both sides of the welding assembly (2); The clamping mechanism (3) comprises a second annular radial adjustment mechanism (31), and a plurality of radial transmission ends on the second annular radial adjustment mechanism (31) are provided with a plurality of clamping rollers (32), wherein one of the clamping rollers (32) is driven by a first motor (33).

2. A liquefied propane cylinder annular welding device according to claim 1, characterized in that: The first annular radial adjustment mechanism (21) comprises a first vertical plate (2101) fixedly mounted on the top surface of the connection between the two linear motors (1); a first circular ring (2102) is fixedly connected to the side wall of the first vertical plate (2101); a first sleeve ring (2103) is rotatably sleeved on the outer wall of the first circular ring (2102); a second circular ring (2104) is fixedly sleeved on the inner wall of the first sleeve ring (2103); a plurality of first guide grooves (2105) are fixedly arranged on the end surface of the first circular ring (2102) located inside the first sleeve ring (2103); a first transmission block (2106) is slidably connected to the inner wall of the first guide groove (2105); the first transmission block (2106) is rotatably sleeved on the outer wall of the first circular ring (2102); ), the side wall of the first transmission block (2106) is fixedly connected with a first cylinder (2107), one side end face of the second ring (2104) is slidably connected with the side wall of the first transmission block (2106), the second ring (2104) is provided with a plurality of first strip holes (2108), the first strip holes (2108) are inclined relative to the radial direction of the second ring (2104), the outer wall above the first sleeve ring (2103) is provided with a first tooth (2109), the first ring (2102) is fixedly mounted with a second motor (2110), and the output end shaft of the second motor (2110) is connected with a first gear (2111) meshing with the first tooth (2109).

3. A liquefied propane cylinder annular welding device according to claim 2, characterized in that: The bionic welding machine (26) comprises a first mounting block (2601) fixedly connected to a first transmission block (2106); a U-shaped block (2602) is fixedly connected to the side wall of the first mounting block (2601); a movable block (2603) is rotatably connected to the inner wall of the U-shaped block (2602) via a pin shaft; a two-guard welding gun (2604) is fixedly installed on the bottom of the movable block (2603); and a top of the movable block (2603) is fixedly connected to the inner wall of the U-shaped block (2602). A rectangular block (2605) is provided, and a straight slot (2606) is vertically opened on the rectangular block (2605); a third motor (2607) is fixedly installed on the first mounting block (2601); the output end shaft of the third motor (2607) is connected to a driving disk (2608); the end surface of the driving disk (2608) is eccentrically fixedly connected to a driving shaft (2609); and the driving shaft (2609) is slidably connected to the inner wall of the straight slot (2606).

4. A liquefied propane cylinder annular welding device according to claim 2, characterized in that: The weld knocking mechanism (22) comprises a support block (2201) fixedly mounted on a first transmission block (2106); a shell (2202) is fixedly mounted on the support block (2201); an opening is provided at the bottom of the shell (2202); a rotating shaft (2203) is rotatably connected to the inner wall of the opening; a knocking rod (2204) is fixedly connected to the outer wall of the rotating shaft (2203) located inside the shell (2202); a torsion spring (2205) is sleeved on the outer wall of the rotating shaft (2203) located outside the shell (2202); two ends of the torsion spring (2205) are respectively connected to the outer wall of the rotating shaft (2203) and the shell (2202); The side wall of the body (2202) is fixedly connected, and a fourth motor (2206) is fixedly installed on the side wall of the shell (2202). The output end shaft of the fourth motor (2206) is connected to the outer wall of the shell (2202) and is fixedly sleeved with a circular block (2207). The outer wall of the circular block (2207) is fixedly connected to a plurality of rectangular pressing blocks (2208). The rectangular pressing block (2208) presses down the end of the knocking rod (2204) by rotation, and the torsion spring (2205) is used to provide torsion for the return of the knocking rod (2204), so as to enable the bottom end of the knocking rod (2204) to knock the weld, thereby removing the weld skin.

5. The liquefied propane cylinder annular welding equipment according to claim 2, characterized in that: The weld grinding mechanism (23) comprises a second mounting block (2301) fixedly mounted on the first transmission block (2106); the side wall of the second mounting block (2301) is fixedly connected with two symmetrically arranged connecting blocks (2302); the side wall between the two connecting blocks (2302) is fixedly connected with two guide rods (2303); the outer walls of the two guide rods (2303) are slidably connected with L-shaped blocks (2304); the outer walls of the guide rods (2303) are sleeved with springs (2305); the two ends of the spring (2305) are respectively pressed against the L-shaped block (2304) and the connecting block (2302); a fifth motor (2307) is fixedly mounted on the L-shaped block (2304); the output end shaft of the fifth motor (2307) is connected with a grinding wheel (2306) for grinding the weld.

6. A liquefied propane cylinder annular welding device according to claim 2, characterized in that: The double-bevel mechanism (24) for the bottle body port comprises a first electric push rod (2401) fixedly mounted on a first circular ring (2102), wherein the first electric push rod (2401) transmits in the radial direction of the first circular ring (2102), and a first L-shaped plate (2402) is fixedly connected to its transmission end; a sixth motor (2403) is fixedly mounted on the first L-shaped plate (2402), and a tool rod (2404) is fixedly connected to the output end of the sixth motor (2403); a plurality of V-shaped cutters (2405) are fixedly connected to the outer wall of the tool rod (2404), and the V-shaped cutters are arranged at right angles to realize the cutting of the double-bevel of the gas cylinder port.

7. The liquefied propane cylinder annular welding equipment according to claim 1, characterized in that: The sealing and shrinking mechanism (25) comprises a right-angle block (2501) fixedly mounted on the first vertical plate (2101), a second electric push rod (2502) fixedly mounted on the right-angle block (2501), the second electric push rod (2502) performs transmission in the vertical direction, and a strip block (2503) is fixedly connected to the transmission end thereof; a transmission shaft is rotatably connected to the side wall of the strip block (2503) near the top, and the two ends of the transmission shaft are respectively fixedly connected to The second gear (2504) and the inner shrinking wheel (2505) are respectively fixedly connected to the second gear (2504) and the inner shrinking wheel (2505); the side wall of the strip block (2503) is provided with a rectangular hole (2506), the inner wall of the rectangular hole (2506) is slidably connected to a slider (2507), the side wall of the slider (2507) is rotatably connected to a transmission shaft, and the two ends of the transmission shaft are respectively fixedly connected to the third gear (2508) and the outer shrinking wheel (2509); the bottom of the strip block (2503) is fixedly connected to a hydraulic cylinder (2 510), the telescopic end of the hydraulic cylinder (2510) is fixedly connected to the slider (2507), a sleeve (2511) is fixedly installed on the telescopic end of the second electric push rod (2502), a lifting rod (2512) is slidably sleeved on the inner wall of the sleeve (2511), a seventh motor (2513) is fixedly installed on the top of the lifting rod (2512), and the output end of the seventh motor (2513) is axially connected to one end of the third gear (2508). The inner shrinking wheel (2505) and the outer shrinking wheel (2509) are located on the same side, the inner shrinking wheel (2505) is arranged in two sections of columns, and the diameter of one section of the column close to the strip block (2503) is smaller than the diameter of the other section of the column, and the connection between the two sections of the column is set at a chamfered angle; the outer shrinking wheel (2509) is also arranged in two sections of columns, and the diameter of the column head of one section close to the slider (2507) is larger than the diameter of the other section of the column, and the connection between the two sections of the column is set at a chamfered angle.

8. The liquefied propane cylinder annular welding equipment according to claim 1, characterized in that: The second annular radial adjustment mechanism (31) comprises a second vertical plate (3101) fixedly mounted on the top surface of the transmission platform of the linear motor (1); a third circular ring (3102) is fixedly connected to the side wall of the second vertical plate (3101); a second sleeve ring (3103) is rotatably sleeved on the outer wall of the third circular ring (3102); a fourth circular ring (3104) is fixedly sleeved on the inner wall of the second sleeve ring (3103); a plurality of second guide grooves (3105) are fixedly arranged on the end surface of the third circular ring (3102) located inside the second sleeve ring (3103); a second transmission block (3106) is slidably connected to the inner wall of the second guide groove (3105); the second transmission block (3106) transmits in the radial direction of the third circular ring (3102); a second column (3107) is fixedly connected to the side wall of the second transmission block (3106); a side end surface of the fourth circular ring (3104) is fixedly sleeved on the outer wall of the third circular ring (3102); The side wall of the second transmission block (3106) is slidably connected, a plurality of second strip holes (3108) are provided on the fourth circular ring (3104), and the second strip holes (3108) are inclined relative to the radial direction of the fourth circular ring (3104). The outer wall above the second sleeve ring (3103) is provided with second teeth (3109). An eighth motor (3110) is fixedly mounted on the third circular ring (3102), and the output end of the eighth motor (3110) is axially connected to a fourth gear (3111) meshing with the second teeth (3109). A U-shaped frame (3112) is fixedly mounted on the second transmission block (3106), and the clamping roller (32) is rotatably mounted on the inner wall of the U-shaped frame (3112) through a pin shaft. The first motor (33) is fixedly mounted on the U-shaped frame (3112), and the output end of the first motor (33) is axially connected to one end of the clamping roller (32).

9. A liquefied propane cylinder welding method according to claim 1, characterized in that: The liquefied propane cylinder annular welding device according to any one of claims 1 to 8 comprises the following steps: S1, placing the body and the end cap of the liquefied propane steel cylinder in two clamping mechanisms (3) respectively, and the second annular radial adjustment mechanism (31) drives a plurality of clamping rollers (32) to tighten the body and the end cap of the liquefied propane steel cylinder respectively; S2, two linear motors (1) drive their respective clamping mechanisms (3) to move toward the welding assembly (2); S3, the end cap is subjected to a necking process near the end cap necking mechanism (25), and at the same time, the body of the liquefied propane cylinder is subjected to a double groove process near the body port by a double groove mechanism (24), so as to perform a double groove process on the port of the liquefied propane cylinder; S4, after the double groove processing of the head necking and the bottle body port is completed, the two clamping mechanisms (3) move towards each other to insert the head necking into the inner wall of the bottle body port; S5, the first motors (33) in the two clamping mechanisms (3) synchronously drive the clamping rollers (32) to rotate, so that the sealing head and the bottle body rotate synchronously, the first annular radial adjustment mechanism (21) drives the bionic welding machine (26), the weld seam striking mechanism (22) and the weld seam grinding mechanism (23) to move toward the position of the weld seam, the welding wire in the bionic welding machine (26) enters the weld seam, the striking end of the weld seam striking mechanism (22) is pressed tightly in the weld seam, and the grinding end of the weld seam grinding mechanism (23) enters the weld seam; S6, the bionic welding machine (26) is turned on and the hand-cranked welding machine is swung to simulate the welder, so that the welding wire is synchronously swung in the weld, and the welding wire is melted in the weld to weld it, and at the same time, the weld percussion mechanism (22) continuously percusses the weld to generate percussion vibration on the end cap and the bottle body, and the vibration causes the molten liquid to fill the groove gap below; S7, the end cap and the bottle body continue to rotate, the molten liquid solidifies, and the weld seam knocking mechanism (22) continues to knock the weld seam to knock off the weld skin and residue generated in the weld seam; S8, the sealing head and the bottle body continue to rotate, and the weld grinding mechanism (23) grinds and polishes the weld after the weld skin falls off.

Images