Laser straight seam welding equipment and method for stainless steel cylinder

Abstract

The invention relates to the technical field of stainless steel cylinder welding, in particular to laser straight seam welding equipment and method for a stainless steel cylinder. The equipment main body comprises a manipulator with seven degrees of freedom, and the manipulator is used for performing laser straight seam welding on the stainless steel cylinder; the clamping seat is detachably arranged and is provided with a clamping hole matched with the outer diameter of the stainless steel cylinder, and a circle locking mechanism is arranged at the clamping seat and is used for clamping and fixing the end part of the outer wall of the stainless steel cylinder; the outer rounding mechanism and the inner rounding mechanism are used for rounding the outer wall and the inner wall of the stainless steel cylinder in the reciprocating motion process, through the structure, the straight seam of the stainless steel cylinder is well repaired, the situations of rolling, folding and concave-convex are avoided, and the inferior product rate is reduced. The method is realized through the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel cylinder welding, in particular to a laser straight seam welding device and a method for welding a stainless steel cylinder. Background Art

[0002] In the prior art, during the straight seam welding of the stainless steel cylinder by the laser welding machine, the stainless steel cylinder is generally clamped and fixed manually, and the position of the weld needs to be adjusted during the clamping and fixing of the stainless steel cylinder, and the weld needs to be polished manually after the welding is completed. Based on this, a Chinese invention patent with patent announcement number CN117900620B discloses a laser straight seam welding device for a stainless steel cylinder, which uses a core shaft, a guide rod and a pushing assembly to enable the stainless steel cylinder to be moved to a processing station during the straight seam welding of the stainless steel cylinder, and then uses a pneumatic sealing plate, a mounting bar and a pneumatic pressure plate to merge the gap on the surface of the stainless steel cylinder to ensure subsequent welding and avoid the gap on the surface of the stainless steel cylinder from being easily offset after the gap is merged. Subsequently, the laser welding head welds the gap on the surface of the stainless steel cylinder, and after the welding is completed, the stainless steel cylinder is polished using a grinding belt, which is conducive to polishing the weld of the stainless steel cylinder after the welding is completed when it is pushed out of the installation box, without the need for additional manual polishing.

[0003] Since stainless steel cylinders are generally formed by welding after rolling metal plates, the straight seams of the stainless steel cylinders may be folded or uneven during the rolling process. Although the above patent can better merge the gaps on the surface of the stainless steel cylinders, it has certain limitations when encountering the above situation, which may result in poor quality of some finished products of the stainless steel cylinders and difficulty in subsequent manual inspection. Summary of the invention

[0004] The object of the present invention is to provide a laser straight seam welding device and method for a stainless steel cylinder to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A laser straight seam welding device for a stainless steel cylinder comprises an equipment body, the equipment body comprises a workbench, a welding mechanism is arranged on the workbench surface, the welding mechanism comprises a manipulator with seven degrees of freedom, the manipulator is used for laser straight seam welding of the stainless steel cylinder; the workbench surface is symmetrically provided with clamping seats on both sides of the manipulator, the clamping seats are detachably arranged and have clamping holes matched with the outer diameter of the stainless steel cylinder, a circle locking mechanism is arranged at the clamping seats, the circle locking mechanism is used for clamping and fixing the outer wall end of the stainless steel cylinder; the workbench surface is also provided with an outer circle-forming mechanism and an inner circle-forming mechanism that cooperate with each other, the outer circle-forming mechanism and the inner circle-forming mechanism synchronously reciprocate along the axial direction of the stainless steel cylinder and preheat the stainless steel cylinder, the outer circle-forming mechanism rounds the outer wall of the stainless steel cylinder during the reciprocating motion, and the inner circle-forming mechanism rounds the inner wall of the stainless steel cylinder during the reciprocating motion.

[0006] Preferably, the manipulator includes a mounting seat, a rotation control seat is provided above the mounting seat, a first robotic arm is rotatably provided at the output shaft of the rotation control seat, a second robotic arm is rotatably provided at the other end of the first robotic arm away from the rotation control seat, a third robotic arm is rotatably provided at the other end of the second robotic arm away from the first robotic arm, a fourth robotic arm is rotatably provided at the other end of the third robotic arm away from the second robotic arm, a gripper is provided at the other end of the fourth robotic arm away from the third robotic arm, and the gripper is used to install a laser welding generator.

[0007] Preferably, the circle locking mechanism comprises two clamping members and a pad which are symmetrically arranged along the circumference of the clamping hole, the clamping members comprise a sliding sleeve arranged on the outer wall of the clamping seat and a clamping rod moving in the sliding sleeve, the length direction of the clamping rod is arranged radially along the clamping hole, an arc-shaped abutment block is provided at the end of the clamping rod, and the arc-shaped abutment block has an arc-shaped anti-slip surface.

[0008] Preferably, the clamping rod is provided with a thread groove along the length direction, and a threaded rod is provided at the clamping rod to cooperate with the thread groove thread, one end of the threaded rod extends to the arc-shaped abutment block, and the other end of the threaded rod is provided with a rotating handle.

[0009] Preferably, the outer full circle mechanism includes an outer full circle plate, which reciprocates axially along the outer wall of the stainless steel cylinder under the action of the first driving mechanism, and the outer full circle plate has an outer full circle hole for the stainless steel cylinder to pass through, and a grinding ring is rotatably provided in the outer full circle hole, and a plurality of grinding protrusions are evenly spaced along the circumferential direction on the inner wall of the grinding ring, and a gear ring is provided on the outer wall of the grinding ring along the circumferential direction, and a gear for meshing with the gear ring is provided in the outer full circle hole, and the gear is driven by a first driving motor arranged on the outer wall of the outer full circle plate.

[0010] Preferably, the first driving mechanism includes an electric slide rail arranged on the table surface of the workbench, and the outer full circular plate is provided with a matching portion for walking on the electric slide rail; a guide rod is provided between the two symmetrically arranged clamping seats, and the outer full circular plate is provided with a guide hole for the matching guide rod.

[0011] Preferably, the inner full circular mechanism includes an inner full circular plate, which reciprocates axially along the inner wall of the stainless steel cylinder under the action of a second driving mechanism, and a plurality of inner full circular parts are evenly spaced on both sides of the movement direction of the inner full circular plate and along the circumference of the inner full circular plate, and the length directions of the plurality of inner full circular parts located on the same side of the inner full circular plate are different, and the inner full circular part includes a first support rod, and the length direction of the first support rod is perpendicular to the plate surface of the inner full circular plate, a second support rod is perpendicularly provided at the end of the first support rod, and the length direction of the second support rod is radially arranged along the inner full circular plate, and an arc-shaped walking plate is provided at the end of the second support rod, and a plurality of grinding wheels are provided at the arc-shaped walking plate.

[0012] Preferably, the length of the second support rod is adjustable, a mounting sleeve is provided at the end of the first support rod, the end of the second support rod can be telescoped in the mounting sleeve, and an abutting bolt is provided on the outer wall of the mounting sleeve to tighten and fix the corresponding section of the second support rod.

[0013] Preferably, the second driving mechanism includes covers respectively arranged at the outer walls of the corresponding clamping seats, the covers are fixed by mounting columns arranged at the outer walls of the clamping seats, a second driving motor is arranged at one of the covers, a driving rod is arranged on the output shaft of the second driving motor, and the inner full circular plate moves under the action of the driving rod.

[0014] A laser straight seam welding method for a stainless steel cylinder is implemented by the above-mentioned laser straight seam welding device for a stainless steel cylinder, and comprises the following steps: S1. Place the stainless steel cylinder at the welding position of the workbench, and align the straight seam gap of the stainless steel cylinder upward; S2, respectively fix the two ends of the stainless steel cylinder at the clamping holes corresponding to the clamping seat and fix them by a locking mechanism; S3, starting the outer rounding mechanism and the inner rounding mechanism to operate, the outer rounding mechanism and the inner rounding mechanism synchronously reciprocate along the axial direction of the stainless steel cylinder when working and preheat the stainless steel cylinder, the outer rounding mechanism rounds the outer wall of the stainless steel cylinder during the reciprocating motion, and the inner rounding mechanism rounds the inner wall of the stainless steel cylinder during the reciprocating motion; S4, after the rounding operation of the outer rounding mechanism and the inner rounding mechanism is completed, the manipulator is started to operate, and the manipulator is used to perform laser straight seam welding on the stainless steel cylinder; S5. After welding is completed, remove the stainless steel cylinder; S6. Repeat steps S1-S5.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, when the external rounding mechanism is operating, the grinding ring at the external rounding plate can rotate under the action of the first driving motor, so that the multiple grinding protrusions evenly spaced on the inner wall of the grinding ring can grind flat the folds and bumps on the outer wall of the stainless steel cylinder, so that the outer wall of the stainless steel cylinder can be rounded, and in this grinding process, since the grinding protrusions are tightly fitted to the outer wall of the stainless steel cylinder, the external rounding mechanism will generate friction heat during operation, and the friction heat can preheat the stainless steel cylinder, making it convenient for the robot to perform laser straight seam welding on the stainless steel cylinder.

[0016] 2. In the present invention, when the inner rounding mechanism is operating, the inner rounding parts of different lengths reciprocate axially on the inner wall of the stainless steel cylinder under the action of the second driving mechanism, that is, rotational motion. Since the lengths of the inner rounding parts are different, the arc-shaped walking plate at the inner rounding parts can round the inner wall of the stainless steel cylinder with high efficiency, and grind the folds and bumps on the inner wall of the stainless steel cylinder. The wheel surface of the grinding wheel is provided with a rough surface, which is convenient for walking and can generate friction and heat on the inner wall of the stainless steel cylinder. The friction heat generated can preheat the stainless steel cylinder, making it convenient for the robot to perform laser straight seam welding on the stainless steel cylinder.

[0017] 3. In the present invention, the end of the outer wall of the stainless steel cylinder can be better clamped and fixed by the locking mechanism, that is, the arc-shaped abutment block at the clamping rod is fitted with the outer wall of the stainless steel cylinder, and the arc-shaped anti-slip surface of the arc-shaped abutment block can better match the outer wall of the stainless steel cylinder to prevent sliding; and, by arranging a threaded rod, the end of the threaded rod can be tightened again after the arc-shaped abutment block has acted, thereby further enhancing the clamping stability of the stainless steel cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the device body of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the manipulator of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the clamping seat of the present invention.

[0021] Figure 4 It is a schematic structural diagram of another clamping seat of the present invention.

[0022] Figure 5 It is a schematic structural diagram of the clamping member of the present invention.

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the external full-circle mechanism of the present invention.

[0024] Figure 7 It is a structural schematic diagram of the inner full circle mechanism of the present invention.

[0025] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of part A.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 100, equipment body; 110, workbench; 120, manipulator; 121, mounting seat; 122, rotation control seat; 123, first manipulator arm; 124, second manipulator arm; 125, third manipulator arm; 126, fourth manipulator arm; 127, gripper; 130, clamping seat; 131, clamping hole; 132, mounting column; 140, locking mechanism; 141, clamping member; 142, pad; 143, sliding sleeve; 144, clamping rod; 145, arc-shaped abutment block; 146, arc-shaped anti-slip surface; 147, threaded groove; 148, threaded rod; 149, rotating handle; 150. External full-circle mechanism; 151. External full-circle plate; 152. External full-circle hole; 153. Grinding ring; 154. Grinding protrusion; 155. Gear ring; 156. Gear; 157. Matching part; 158. Guide hole; 160. Internal full-circle mechanism; 161. Internal full-circle plate; 162. Internal full-circle member; 163. First support rod; 164. Second support rod; 165. Arc-shaped walking plate; 166. Grinding wheel; 167. Mounting sleeve; 168. Abutment bolt; 170. Electric slide rail; 180. Drive rod; 190. Guide rod; 210. Cover; 220. Second drive motor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-8 , the present invention provides a technical solution: A laser straight seam welding device for a stainless steel cylinder comprises a device body 100, the device body 100 comprises a workbench 110, a welding mechanism is arranged on the workbench 110, the welding mechanism comprises a manipulator 120 with seven degrees of freedom, the manipulator 120 is used for laser straight seam welding of the stainless steel cylinder; a clamping seat 130 is symmetrically arranged on both sides of the manipulator 120 on the workbench 110, the clamping seat 130 is detachably arranged and has a clamping hole 131 adapted to the outer diameter of the stainless steel cylinder, and the clamping seat 130 is symmetrically arranged on both sides of the manipulator 120, and the clamping seat 130 is detachably arranged and has a clamping hole 131 adapted to the outer diameter of the stainless steel cylinder, and the clamping seat 130 is symmetrically arranged on the workbench 110 and the clamping hole 131 ... A locking mechanism 140 is provided at position 30, and the locking mechanism 140 is used to clamp and fix the outer wall end of the stainless steel cylinder; an outer rounding mechanism 150 and an inner rounding mechanism 160 that cooperate with each other are also provided on the workbench. The outer rounding mechanism 150 and the inner rounding mechanism 160 reciprocate synchronously along the axial direction of the stainless steel cylinder and preheat the stainless steel cylinder. The outer rounding mechanism 150 rounds the outer wall of the stainless steel cylinder during the reciprocating motion, and the inner rounding mechanism 160 rounds the inner wall of the stainless steel cylinder during the reciprocating motion.

[0029] In this embodiment, the manipulator 120 includes a mounting seat 121, a rotation control seat 122 is provided above the mounting seat 121, a first mechanical arm 123 is rotatably provided at the output shaft of the rotation control seat 122, a second mechanical arm 124 is rotatably provided at the other end of the first mechanical arm 123 away from the rotation control seat 122, a third mechanical arm 125 is rotatably provided at the other end of the second mechanical arm 124 away from the first mechanical arm 123, a fourth mechanical arm 126 is rotatably provided at the other end of the third mechanical arm 125 away from the second mechanical arm 124, a gripper 127 is provided at the other end of the fourth mechanical arm 126 away from the third mechanical arm 125, and the gripper 127 is used to install a laser welding generator. Therefore, the straight seam welding operation can be better performed with multiple degrees of freedom.

[0030] In this embodiment, the locking circle mechanism 140 includes two clamping members 141 and a pad 142 which are symmetrically arranged along the circumference of the clamping hole 131. The clamping member 141 includes a sliding sleeve 143 arranged on the outer wall of the clamping seat 130 and a clamping rod 144 moving in the sliding sleeve 143. The length direction of the clamping rod 144 is radially arranged along the clamping hole 131. The end of the clamping rod 144 is provided with an arc-shaped abutment block 145, and the arc-shaped abutment block 145 has an arc-shaped anti-slip surface 146.

[0031] Through the above structure, the end of the outer wall of the stainless steel cylinder can be better clamped and fixed by the locking mechanism 140, that is, the arc-shaped abutment block 145 at the clamping rod 144 is fitted with the outer wall of the stainless steel cylinder, and the arc-shaped anti-slip surface 146 of the arc-shaped abutment block 145 can better cooperate with the outer wall of the stainless steel cylinder to prevent sliding.

[0032] For the stainless steel cylinder with a relatively smooth outer wall, the clamping rod 144 is further provided with a threaded groove 147 along the length direction, and a threaded rod 148 threadably matched with the threaded groove 147 is provided at the clamping rod 144. One end of the threaded rod 148 extends to the arc-shaped abutment block 145, and the other end of the threaded rod 148 is provided with a rotating handle 149.

[0033] Through the above structure, the end of the threaded rod 148 can be tightened again after the arc-shaped abutment block 145 has acted, further enhancing the clamping stability of the stainless steel cylinder.

[0034] In this embodiment, the outer full circle mechanism 150 includes an outer full circle plate 151, which reciprocates axially along the outer wall of the stainless steel cylinder under the action of the first driving mechanism. The outer full circle plate 151 has an outer full circle hole 152 for the stainless steel cylinder to pass through. A grinding ring 153 is rotatably provided in the outer full circle hole 152. A plurality of grinding protrusions 154 are evenly spaced along the circumferential direction on the inner wall of the grinding ring 153. A gear ring 155 is circumferentially provided on the outer wall of the grinding ring 153. A gear 156 for meshing with the gear ring 155 is provided in the outer full circle hole 152. The gear 156 is driven by a first driving motor arranged on the outer wall of the outer full circle plate 151.

[0035] Through the above-mentioned structure, when the external rounding mechanism 150 is operating, the grinding ring 153 at the external rounding plate 151 can rotate under the action of the first driving motor, so that the multiple grinding protrusions 154 evenly spaced on the inner wall of the grinding ring 153 can grind out the folds and bumps on the outer wall of the stainless steel cylinder, so that the outer wall of the stainless steel cylinder can be rounded, and in this grinding process, since the grinding protrusions 154 are tightly fitted to the outer wall of the stainless steel cylinder, the external rounding mechanism 150 will generate friction heat during operation, and the friction heat can preheat the stainless steel cylinder, making it convenient for the robot 120 to perform laser straight seam welding on the stainless steel cylinder.

[0036] The first driving mechanism includes an electric slide rail 170 disposed on the table surface of the workbench 110, and the outer full circular plate 151 is provided with a matching portion 157 for traveling on the electric slide rail 170; a guide rod 190 is provided between two symmetrically arranged clamping seats 130, and the outer full circular plate 151 is provided with a guide hole 158 for matching the guide rod 190. Therefore, the outer full circular plate 151 is preferably driven to reciprocate along the axial direction of the outer wall of the stainless steel cylinder.

[0037] In this embodiment, the inner full circle mechanism 160 includes an inner full circle plate 161, which reciprocates axially along the inner wall of the stainless steel cylinder under the action of the second driving mechanism. A plurality of inner full circle parts 162 are evenly spaced on both sides of the movement direction of the inner full circle plate 161 and along the circumference of the inner full circle plate 161. The length directions of the plurality of inner full circle parts 162 located on the same side of the inner full circle plate 161 are different. The inner full circle part 162 includes a first support rod 163, and the length direction of the first support rod 163 is perpendicular to the plate surface of the inner full circle plate 161. A second support rod 164 is perpendicularly provided at the end of the first support rod 163. The length direction of the second support rod 164 is radially arranged along the inner full circle plate 161. An arc-shaped walking plate 165 is provided at the end of the second support rod 164, and a plurality of grinding wheels 166 are provided at the arc-shaped walking plate 165.

[0038] Through the above structure, when the inner rounding mechanism 160 is operating, the inner rounding parts 162 of different lengths reciprocate axially on the inner wall of the stainless steel cylinder under the action of the second driving mechanism, that is, rotational motion. Since the inner rounding parts 162 are of different lengths, the arc-shaped walking plate 165 at the inner rounding parts 162 can more efficiently round the inner wall of the stainless steel cylinder and grind the folds and bumps on the outer wall of the stainless steel cylinder. The wheel surface of the grinding wheel 166 is provided with a rough surface, which is convenient for walking and can generate friction and heat on the inner wall of the stainless steel cylinder. The friction heat generated can preheat the stainless steel cylinder, making it convenient for the robot 120 to perform laser straight seam welding on the stainless steel cylinder.

[0039] In this embodiment, the length of the second support rod 164 is adjustable, the end of the first support rod 163 is provided with a mounting sleeve 167, the end of the second support rod 164 can be telescopically inserted into the mounting sleeve 167, and the outer wall of the mounting sleeve 167 is provided with abutment bolts 168 to tighten and fix the corresponding section of the second support rod 164. Therefore, the inner rounding mechanism 160 is supported on the inner wall of the stainless steel cylinder.

[0040] In this embodiment, the second driving mechanism includes covers 210 respectively arranged at the outer wall of the corresponding clamping seat 130, and the covers 210 are fixed by mounting columns 132 arranged at the outer wall of the clamping seat 130. A second driving motor 220 is arranged at one of the covers 210, and a driving rod 180 is arranged on the output shaft of the second driving motor 220. The inner full circular plate 161 moves under the action of the driving rod 180. Therefore, the outer full circular plate 151 is preferably driven to reciprocate along the axial direction of the outer wall of the stainless steel cylinder.

[0041] A laser straight seam welding method for a stainless steel cylinder is implemented by the above-mentioned laser straight seam welding device for a stainless steel cylinder, and comprises the following steps: S1, placing the stainless steel cylinder at the welding position of the workbench 110, and aligning the straight seam gap of the stainless steel cylinder upward; S2, fix the two ends of the stainless steel cylinder to the clamping holes 131 of the corresponding clamping seat 130 and fix it by the locking mechanism 140; S3, start the outer rounding mechanism 150 and the inner rounding mechanism 160 to operate. When the outer rounding mechanism 150 and the inner rounding mechanism 160 are working, they synchronously reciprocate along the axial direction of the stainless steel cylinder and preheat the stainless steel cylinder. The outer rounding mechanism 150 rounds the outer wall of the stainless steel cylinder during the reciprocating motion, and the inner rounding mechanism 160 rounds the inner wall of the stainless steel cylinder during the reciprocating motion. S4, after the rounding operation of the outer rounding mechanism 150 and the inner rounding mechanism 160 is completed, the manipulator 120 is started to operate, and the manipulator 120 is used to perform laser straight seam welding on the stainless steel cylinder; S5. After welding is completed, remove the stainless steel cylinder; S6. Repeat steps S1-S5.

[0042] Working principle: When the external rounding mechanism 150 is operating, the grinding ring 153 at the external rounding plate 151 can rotate under the action of the first driving motor, so that the multiple grinding protrusions 154 evenly spaced on the inner wall of the grinding ring 153 can grind down the folds and bumps on the outer wall of the stainless steel cylinder, so that the outer wall of the stainless steel cylinder can be rounded. In this grinding process, since the grinding protrusions 154 are tightly fitted to the outer wall of the stainless steel cylinder, friction heat is generated during the operation of the external rounding mechanism 150, and the friction heat can preheat the stainless steel cylinder, making it convenient for the manipulator 120 to perform laser straight seam welding on the stainless steel cylinder. When the inner rounding mechanism 160 is operating, the inner rounding parts 162 of different lengths reciprocate axially on the inner wall of the stainless steel cylinder under the action of the second driving mechanism, that is, rotational motion. Since the inner rounding parts 162 are of different lengths, the arc-shaped walking plate 165 at the inner rounding parts 162 can round the inner wall of the stainless steel cylinder with high efficiency, and grind the folds and bumps on the outer wall of the stainless steel cylinder. The wheel surface of the grinding wheel 166 is provided with a rough surface, which is convenient for walking and can generate friction and heat on the inner wall of the stainless steel cylinder. The friction heat generated can preheat the stainless steel cylinder, making it convenient for the manipulator 120 to perform laser straight seam welding on the stainless steel cylinder.

[0043] Through the joint action of the external rounding mechanism 150 and the internal rounding mechanism 160, not only can the folds and bumps on the inner and outer walls of the stainless steel cylinder be smoothed and rounded, but the stainless steel cylinder can also be preheated so that the robot 120 can smoothly perform laser straight seam welding on the stainless steel cylinder.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser straight seam welding device for stainless steel cylinders, characterized in that: The invention comprises an equipment body (100), wherein the equipment body (100) comprises a workbench (110), a welding mechanism is arranged on the workbench (110), the welding mechanism comprises a manipulator (120) with seven degrees of freedom, the manipulator (120) is used to perform laser straight seam welding on a stainless steel cylinder; a clamping seat (130) is symmetrically arranged on both sides of the manipulator (120) on the workbench (110), the clamping seat (130) is detachably arranged and has a clamping hole (131) adapted to the outer diameter of the stainless steel cylinder, and a clamping seat (130) is arranged on the clamping seat (130) A locking mechanism (140) is provided, and the locking mechanism (140) is used to clamp and fix the end of the outer wall of the stainless steel cylinder; an outer rounding mechanism (150) and an inner rounding mechanism (160) that cooperate with each other are also provided on the table surface of the workbench, and the outer rounding mechanism (150) and the inner rounding mechanism (160) are synchronously reciprocated along the axial direction of the stainless steel cylinder and preheat the stainless steel cylinder. The outer rounding mechanism (150) rounds the outer wall of the stainless steel cylinder during the reciprocating motion, and the inner rounding mechanism (160) rounds the inner wall of the stainless steel cylinder during the reciprocating motion.

2. The laser straight seam welding equipment for stainless steel cylinder according to claim 1 is characterized in that: The manipulator (120) comprises a mounting seat (121), a rotation control seat (122) is provided above the mounting seat (121), a first manipulator arm (123) is rotationally provided at the output shaft of the rotation control seat (122), a second manipulator arm (124) is rotationally provided at the other end of the first manipulator arm (123) away from the rotation control seat (122), a third manipulator arm (125) is rotationally provided at the other end of the second manipulator arm (124) away from the first manipulator arm (123), a fourth manipulator arm (126) is rotationally provided at the other end of the third manipulator arm (125) away from the second manipulator arm (124), a gripper (127) is provided at the other end of the fourth manipulator arm (126) away from the third manipulator arm (125), and the gripper (127) is used for mounting a laser welding generator.

3. The laser straight seam welding equipment for stainless steel cylinder according to claim 1 is characterized in that: The circle locking mechanism (140) comprises two clamping members (141) and a pad (142) which are symmetrically arranged along the circumference of the clamping hole (131); the clamping member (141) comprises a sliding sleeve (143) arranged on the outer wall of the clamping seat (130) and a clamping rod (144) which moves in the sliding sleeve (143); the length direction of the clamping rod (144) is arranged radially along the clamping hole (131); an arc-shaped abutment block (145) is provided at the end of the clamping rod (144); and the arc-shaped abutment block (145) has an arc-shaped anti-slip surface (146).

4. The laser straight seam welding equipment for stainless steel cylinder according to claim 3 is characterized in that: The clamping rod (144) is provided with a threaded groove (147) along its length direction, and a threaded rod (148) threadably matched with the threaded groove (147) is provided at the clamping rod (144). One end of the threaded rod (148) extends to the arc-shaped abutment block (145), and the other end of the threaded rod (148) is provided with a rotating handle (149).

5. The laser straight seam welding equipment for stainless steel cylinder according to claim 1 is characterized in that: The outer rounding mechanism (150) comprises an outer rounding plate (151), wherein the outer rounding plate (151) reciprocates axially along the outer wall of the stainless steel cylinder under the action of a first driving mechanism, and the outer rounding plate (151) has an outer rounding hole (152) for the stainless steel cylinder to pass through, and a grinding ring (153) is rotatably provided in the outer rounding hole (152), and a plurality of grinding protrusions (154) are evenly spaced along the circumferential direction on the inner side wall of the grinding ring (153), and a gear ring (155) is provided on the outer side wall of the grinding ring (153) along the circumferential direction, and a gear (156) for meshing with the gear ring (155) is provided in the outer rounding hole (152), and the gear (156) is driven by a first driving motor provided on the outer wall of the outer rounding plate (151).

6. The laser straight seam welding equipment for stainless steel cylinder according to claim 5, characterized in that: The first driving mechanism comprises an electric slide rail (170) arranged on the table surface of the workbench (110), and the outer full circular plate (151) is provided with a matching portion (157) for walking on the electric slide rail (170); a guide rod (190) is provided between two symmetrically arranged clamping seats (130), and the outer full circular plate (151) is provided with a guide hole (158) for matching with the guide rod (190).

7. The laser straight seam welding equipment for stainless steel cylinder according to claim 1 is characterized in that: The inner full-circle mechanism (160) comprises an inner full-circle plate (161), wherein the inner full-circle plate (161) reciprocates axially along the inner wall of the stainless steel cylinder under the action of the second driving mechanism, and a plurality of inner full-circle parts (162) are evenly spaced on both sides of the movement direction of the inner full-circle plate (161) and along the circumference of the inner full-circle plate (161), wherein the plurality of inner full-circle parts (162) located on the same side of the inner full-circle plate (161) have different length directions, and the inner full-circle parts (162) comprise a first support rod (163), wherein the length direction of the first support rod (163) is perpendicular to the plate surface of the inner full-circle plate (161), and a second support rod (164) is perpendicularly arranged at the end of the first support rod (163), wherein the length direction of the second support rod (164) is arranged radially along the inner full-circle plate (161), and an arc-shaped walking plate (165) is arranged at the end of the second support rod (164), and a plurality of grinding wheels (166) are arranged at the arc-shaped walking plate (165).

8. The laser straight seam welding equipment for stainless steel cylinder according to claim 7, characterized in that: The length of the second support rod (164) is adjustable, a mounting sleeve (167) is provided at the end of the first support rod (163), the end of the second support rod (164) can be telescopically inserted into the mounting sleeve (167), and an abutment bolt (168) is provided on the outer wall of the mounting sleeve (167) for abutting and fixing the corresponding section of the second support rod (164).

9. The laser straight seam welding equipment for stainless steel cylinder according to claim 7, characterized in that: The second driving mechanism comprises covers (210) respectively arranged at the outer walls of the corresponding clamping seat (130), the covers (210) being fixed by mounting columns (132) arranged at the outer walls of the clamping seat (130), a second driving motor (220) being arranged at one of the covers (210), a driving rod (180) being arranged at the output shaft of the second driving motor (220), and the inner full circular plate (161) moving under the action of the driving rod (180).

10. A method for laser straight seam welding of a stainless steel cylinder, which is implemented by the laser straight seam welding device for a stainless steel cylinder according to claim 1, characterized in that: The following steps are included: S1, placing a stainless steel cylinder at a welding position of the workbench (110), and aligning the straight seam gap of the stainless steel cylinder upward; S2, respectively fixing the two ends of the stainless steel cylinder to the clamping holes (131) corresponding to the clamping seat (130) and fixing them by a locking mechanism (140); S3, starting the outer rounding mechanism (150) and the inner rounding mechanism (160) to operate, wherein the outer rounding mechanism (150) and the inner rounding mechanism (160) synchronously reciprocate along the axial direction of the stainless steel cylinder and preheat the stainless steel cylinder when in operation, wherein the outer rounding mechanism (150) rounds the outer wall of the stainless steel cylinder during the reciprocating motion, and the inner rounding mechanism (160) rounds the inner wall of the stainless steel cylinder during the reciprocating motion; S4, after the rounding operation of the outer rounding mechanism (150) and the inner rounding mechanism (160) is completed, the manipulator (120) is started to operate, and the manipulator (120) is used to perform laser straight seam welding on the stainless steel cylinder; S5. After welding is completed, remove the stainless steel cylinder; S6. Repeat steps S1-S5.

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