Stainless steel tube laser welding equipment and method thereof

Abstract

The invention discloses stainless steel pipe laser welding equipment and a method thereof, and belongs to the technical field of laser welding, according to the stainless steel pipe laser welding equipment, clamping assemblies can be driven to rotate by switching a feeding assembly, so that the positions of the clamping assemblies are switched, and the positions of stainless steel pipes are switched, so that continuous feeding operation of the stainless steel pipes is met; meanwhile, the switching feeding assembly further drives the transmission assembly to rotate, so that the transmission assembly can drive the vacuum grabbing assembly to rotate, the position of a vacuum suction cup is switched through rotation, a stainless steel pipe separation blade corresponds to a stainless steel pipe, and an electric push rod is matched with the vacuum suction cup, so that grabbing of the stainless steel pipe separation blade and butt joint with the stainless steel pipe can be completed; therefore, contact type welding sealing operation is facilitated, automatic continuous feeding operation is achieved in this way, the welding sealing efficiency is improved, and automatic material supplementing and filling of the material taking vacancy can be achieved through the automatic material bouncing assembly after the stainless steel pipe blocking piece is taken out.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and particularly to a laser welding device and method for stainless steel pipes. Background Art

[0002] Both ends of the original stainless steel pipe material are in an open state, which requires us to perform precise welding operations on one end before encapsulation. The working principle of the laser welding device is based on laser welding technology. The laser beam is focused by a focusing lens into a tiny spot, generating an extremely high energy density. This energy density is sufficient to rapidly melt the welded material in a very small area. Subsequently, the melted metal solidifies during the cooling process to form a strong welded joint. However, the current mainstream processing method still relies on manual operation, that is, the open stainless steel pipes are taken out one by one and placed on the designated welding equipment for primary welding. This highly manual process not only has a low degree of automation, significantly restricting the processing efficiency of stainless steel pipes, but also during the welding process, due to the required high-temperature environment, it is extremely easy to cause problems of thermal stress deformation, and may even lead to changes in the metal microstructure and decline in overall performance in the heat-affected area. More seriously, after the welding is completed, the product temperature remains high. At this time, if manual material taking is carried out, the operator is extremely vulnerable to the risk of burns.

[0003] In view of the above problems, the present invention document proposes a laser welding device and method for stainless steel pipes. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a laser welding device and method for stainless steel pipes.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A laser welding device for stainless steel pipes includes a welding and feeding assisting mechanism. The welding and feeding assisting mechanism includes an auxiliary frame, and a laser welding device is fixedly installed on the auxiliary frame. A switching feeding component and a cooling component are arranged on the auxiliary frame. The cooling component is combined with the switching feeding component. A transmission component is connected to the switching feeding component, and a vacuum material grabbing component is arranged on the transmission component. An automatic material ejecting component and a driving component are arranged on the side of the auxiliary frame. The vacuum material grabbing component is located between the automatic material ejecting component and the switching feeding component. Four clamping components are arranged on the switching feeding component, and the driving component is in transmission connection with the clamping components.

[0006] Preferably, the vacuum material grabbing assembly includes a fixing plate, on both sides of which an electric push rod and a vacuum device are respectively and fixedly installed. Four hoses are communicated with the vacuum device, and one end of each hose is communicated with a vacuum chuck. The vacuum chuck is rotatably installed on the fixing plate through a bearing.

[0007] Preferably, the transmission assembly includes a transmission shaft and a second belt transmission structure. The transmission shaft is rotatably installed on the auxiliary frame through a bearing. One end of the transmission shaft is fixedly connected with a fixed disk, and one side of the fixed disk is fixedly connected with the electric push rod.

[0008] Preferably, the switching feeding assembly includes a first motor fixedly installed on the auxiliary frame. The output shaft of the first motor is fixedly connected with a first rotating shaft, which is rotatably installed on the auxiliary frame through a bearing. The first rotating shaft is in transmission connection with the transmission shaft through a second belt transmission structure. One end of the first rotating shaft is fixedly connected with a disk, and on one side of the disk, four three-wing plates are fixedly connected. The four three-wing plates separate the four material clamping assemblies, and the same mesh cylinder is fixedly connected between the four three-wing plates. The mesh cylinder is fixedly connected to the middle of the disk, and four groups of mesh holes are arranged on the mesh cylinder.

[0009] Preferably, the driving assembly includes three second rotating shafts rotatably installed on the auxiliary frame through bearings. One end of each second rotating shaft is fixedly connected with a first gear, and the three second rotating shafts are in transmission connection through two first belt transmission structures. One of the second rotating shafts is fixedly connected with the output shaft of a second motor, and the second motor is fixedly installed on the auxiliary frame.

[0010] Preferably, the material clamping assembly includes a three-jaw chuck rotatably installed on the disk. A stainless steel pipe is clamped by the three-jaw chuck. One side of the three-jaw chuck is fixedly connected with a third rotating shaft, and one end of the third rotating shaft is fixedly connected with a second gear, which meshes with the first gear.

[0011] Preferably, the cooling assembly includes a cooling device and a shielding frame. The cooling assembly is installed on the auxiliary frame. One end of the cooling assembly is communicated with a blower, one end of the blower is communicated with a cold transmission pipe, and both ends of the cold transmission pipe pass through the shielding frame and are respectively communicated with two air spraying pipes located in the mesh cylinder. Side baffles are arranged on both sides of the two air spraying pipes, the side baffles are placed on the inner wall of the mesh cylinder and are fixedly connected to the side wall of the shielding frame. The shielding frame is arranged between two horizontally arranged three-wing plates and is lapped with the disk and the mesh cylinder.

[0012] Preferably, the automatic material ejecting assembly includes a discharging cylinder, a limiting ring is arranged at the discharging port of the discharging cylinder, and stainless steel pipe baffles are stored in the discharging cylinder.

[0013] Preferably, an end cover is provided at the other end of the discharging barrel, a spring is fixedly connected to the end cover, the front end of the spring is fixedly connected to a spring plate, the spring plate is arranged behind the stainless steel tube baffle, pin openings are provided on both sides of the discharging barrel, and a latch structure is provided in the pin opening, and the latch structure is arranged on the end cover.

[0014] A method for using a stainless steel tube laser welding device comprises the following steps: S1. When welding and sealing the stainless steel tube, the stainless steel tube is clamped and fixed by the three-claw chuck, and the electric push rod is retracted to drive the fixed plate to move, so that the fixed plate drives the vacuum suction cup to move, and the vacuum suction cup enters the discharge barrel and contacts the stainless steel tube baffle. The vacuum equipment is then used to vacuum the vacuum suction cup so that the vacuum suction cup absorbs the stainless steel tube baffle. Then the electric push rod is extended so that the fixed plate drives the vacuum suction cup and the vacuum baffle to escape from the discharge barrel. After being taken out, the elastic force of the spring can push the spring plate forward, so that the stainless steel tube baffle moves forward to fill the gap and is limited by the limit ring. S2. After the stainless steel tube and the stainless steel tube baffle are clamped, the first motor drives the first rotating shaft to rotate, and the first rotating shaft drives the disc and the second belt transmission structure to rotate, so that the disc drives the clamping assembly to rotate and change its position, so that the stainless steel tube is located at the laser welding device position. When the second belt transmission structure rotates, the second belt transmission structure drives the transmission shaft to rotate, so that the transmission shaft drives the vacuum material grabbing assembly to rotate through the fixed disk. At this time, the stainless steel tube baffle corresponds to the stainless steel tube, and then the electric push rod is retracted to make the stainless steel tube baffle contact with the stainless steel tube, and at the same time, the vacuum suction cup on the other side contacts the stainless steel tube baffle again and adsorbs; S3. After the stainless steel pipe baffle is in contact with the stainless steel pipe, the gap between the stainless steel pipe baffle and the stainless steel pipe is welded and sealed by a laser welding device. At the same time, the second motor drives the second shaft to rotate, and the second shaft drives the first belt transmission structure to rotate, thereby driving the first gear and the second gear to drive the three-jaw chuck to rotate, and the three-jaw chuck drives the stainless steel pipe to rotate, so that the laser welding device performs a circumferential welding and sealing operation. At the same time, the other two three-jaw chucks rotate to cool the welded stainless steel pipe and the stainless steel pipe that has not been welded and sealed. S4. After the stainless steel pipe is welded and sealed, the vacuum suction cup is used to remove the adsorption of the stainless steel pipe baffle by the vacuum equipment. At the same time, the electric push rod drives the vacuum suction cup to take out the stainless steel pipe baffle again through the fixed plate, and drives the clamping assembly to rotate and exchange positions again by switching the feeding assembly, and then a new round of welding and sealing operation is carried out.

[0015] Compared with the prior art, the present invention provides a stainless steel tube laser welding device and method thereof, which have the following beneficial effects: 1. The laser welding equipment and method for stainless steel pipes can drive the clamping component to rotate by switching the feeding component, so as to switch the positions between the clamping components, thereby switching the positions between the stainless steel pipes, so as to meet the continuous feeding operation of the stainless steel pipes. At the same time, the switching feeding component also drives the transmission component to rotate, so that the transmission component can drive the vacuum material grabbing component to rotate. By rotating to switch the positions of the vacuum suction cups, the stainless steel pipe baffle is made to correspond to the stainless steel pipe. And the electric push rod cooperates with the vacuum suction cup to complete the material grabbing of the stainless steel pipe baffle and realize the docking with the stainless steel pipe, thus facilitating the contact type welding and sealing operation. In this way, the automatic continuous feeding operation is realized, thereby improving the welding and sealing efficiency. Moreover, after the stainless steel pipe baffle is taken out, the automatic material feeding component can realize automatic replenishment of materials to fill the material taking vacancy.

[0016] 2. The laser welding equipment and method for stainless steel pipes switch the positions of the clamping components through the switching feeding component, and then drive the second rotating shaft to rotate by the second motor, so that the second rotating shaft drives the two first belt transmission structures to rotate. The first belt transmission structure can drive multiple second rotating shafts to rotate, so that the second rotating shaft drives the first gear and the second gear to transmit power, and the second gear drives the three-jaw chuck to rotate, so that the three-jaw chuck rotates the stainless steel pipe. At the same time, the cooling equipment performs refrigeration, and the cold air is conveyed through the fan, so that the cold air is ejected through the air injection pipe, so that the upper and lower stainless steel pipes can be cooled. At the same time, due to the rotation of the stainless steel pipe, the cooling uniformity is improved. The pre-cooling method can reduce the heat affected zone during the welding and sealing process, reduce the changes in the metal structure and the decline in performance in the heat affected zone, and maintain the original performance of the stainless steel pipe. Moreover, pre-cooling can reduce the initial temperature of the stainless steel pipe during welding, which is also helpful for controlling welding deformation, can reduce the thermal stress generated by the welding high temperature, and reduce the deformation degree of the stainless steel pipe after welding.

[0017] 3. The laser welding equipment and method for stainless steel pipes can drive the clamping component and the transmission component to rotate by switching the feeding component. The transmission component drives the vacuum material grabbing component to rotate, so that the vacuum material grabbing component switches the feeding. And the clamping component drives the stainless steel pipe to rotate, so as to cooperate with the vacuum material grabbing component to realize continuous operation. At the same time, when the stainless steel pipe is welded and sealed, the clamping component can be driven to rotate by the driving component, so that the stainless steel pipe can rotate for a full circle of welding and sealing operation, and at the same time, rapid cooling treatment of the stainless steel pipe is satisfied. This method can achieve an automatic production process, making the whole operation simple and convenient, with low cost. Moreover, the cooled stainless steel pipe can prevent the problem of scalding during material taking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional view of a laser welding equipment and method for stainless steel pipes proposed by the present invention; Figure 2Stereoscopic view of the auxiliary feeding mechanism of a stainless steel pipe laser welding device and its method proposed by the present invention; Figure 3 Stereoscopic view of the rear view of the auxiliary frame of a stainless steel pipe laser welding device and its method proposed by the present invention; Figure 4 Structural view of the connection between the automatic material ejecting component and the auxiliary frame of a stainless steel pipe laser welding device and its method proposed by the present invention; Figure 5 Stereoscopic view of the cross-section of the switching feeding component of a stainless steel pipe laser welding device and its method proposed by the present invention; Figure 6 Structural view of the connection between the vacuum material grasping component and the transmission component of a stainless steel pipe laser welding device and its method proposed by the present invention; Figure 7 Structural view of the connection between the driving component and the material clamping component of a stainless steel pipe laser welding device and its method proposed by the present invention; Figure 8 Stereoscopic view of the disc of a stainless steel pipe laser welding device and its method proposed by the present invention; Figure 9 Stereoscopic view of the cooling component of a stainless steel pipe laser welding device and its method proposed by the present invention; Figure 10 Stereoscopic view of the cross-section of the automatic material ejecting component of a stainless steel pipe laser welding device and its method proposed by the present invention; Figure 11 In the present invention Figure 10 Enlarged view of part A.

[0019] In the figure: 100, welding auxiliary feeding mechanism; 101, auxiliary frame; 102, cooling assembly; 1021, cooling equipment; 1022, fan; 1023, cooling pipe; 1024, shielding frame; 1025, jet pipe; 1026, side stop; 103, automatic ejection assembly; 1031, discharge barrel; 1032, spring; 1033, end cover; 1034, spring plate; 1035, limit ring; 1036, latch structure; 1037, pin mouth; 104, vacuum grab assembly; 1041, vacuum equipment; 1042, fixing plate; 1043, hose; 1044, vacuum suction cup; 10 45. Electric push rod; 105. Switching feeding assembly; 1051. Disc; 1052. First motor; 1053. First rotating shaft; 1054. Three-wing plate; 1055. Net cylinder; 106. Driving assembly; 1061. Second motor; 1062. Second rotating shaft; 1063. First belt transmission structure; 1064. First gear; 107. Clamping assembly; 1071. Third rotating shaft; 1072. Second gear; 1073. Three-jaw chuck; 108. Transmission assembly; 1081. Second belt transmission structure; 1082. Transmission shaft; 1083. Fixed disk; 200. Laser welding device. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] Example 1: Reference Figures 1 - 8 and Figures 10 - 1 , a stainless steel tube laser welding device, comprising a welding and sealing auxiliary feeding mechanism 100, the welding and sealing auxiliary feeding mechanism 100 comprises an auxiliary frame 101, and a laser welding and sealing device 200 is fixedly installed on the auxiliary frame 101; The auxiliary frame 101 is provided with a switching feeding component 105 and a cooling component 102. The switching feeding component 105 includes a first motor 1052 which is fixedly installed on the auxiliary frame 101. The output shaft of the first motor 1052 is fixedly connected with a first rotating shaft 1053. By driving the first rotating shaft 1053 to rotate through the first motor 1052, the first rotating shaft 1053 drives the disc 1051 to rotate, the disc 1051 drives the clamping component 107 to rotate, and the positions of the clamping components 107 are switched, so as to realize continuous feeding operation. The first rotating shaft 1053 is rotatably installed on the auxiliary frame 101 through a bearing, and the first rotating shaft 1053 is in transmission connection with a transmission shaft 1082 through a second belt transmission structure 1081. Through the second belt transmission structure 1081, the power can be transmitted over a long distance, so as to drive the transmission shaft 1082 to rotate. One end of the first rotating shaft 1053 is fixedly connected with a disc 1051. Four three-wing plates 1054 are fixedly connected to one side of the disc 1051. The three-wing plates 1054 separate the clamping components 107, and the three-wing plates 1054 cooperate with the disc 1051 and the shielding frame 1024 to ensure that the layout areas of the upper and lower clamping components are sealed, so as to prevent the cold air from leaking, and the cooling effect of the stainless steel pipe is better. The four three-wing plates 1054 separate the four clamping components 107, and the same mesh cylinder 1055 is fixedly connected between the four three-wing plates 1054. The mesh cylinder 1055 is fixedly connected to the middle of the disc 1051. Four groups of mesh holes are provided on the mesh cylinder 1055. The four groups on the mesh cylinder 1055 respectively correspond to the four clamping components 107, so that the cold air discharged from the air jet pipe 1025 can smoothly pass through the mesh holes to cool the stainless steel pipe. The cooling component 102 is combined with the switching feeding component 105. A transmission component 108 is connected to the switching feeding component 105. The transmission component 108 includes a transmission shaft 1082 and a second belt transmission structure 1081. The transmission shaft 1082 is rotatably installed on the auxiliary frame 101 through a bearing. The transmission shaft 1082 can rotate stably through the bearing, and then can stably drive the fixed plate 1042 to rotate. One end of the transmission shaft 1082 is fixedly connected with a fixed disc 1083. One side of the fixed disc 1083 is fixedly connected with an electric push rod 1045. The front and back movement of the fixed plate 1042 can be controlled through the electric push rod 1045, so as to control the front and back movement of the vacuum chuck 1044, so that the vacuum chuck 1044 can smoothly contact the stainless steel pipe baffle, and at the same time, the vacuum chuck 1044 can drive the stainless steel pipe baffle to be smoothly docked with the stainless steel pipe. A vacuum material grabbing component 104 is arranged on the transmission component 108. The vacuum material grabbing component 104 includes a fixed plate 1042. An electric push rod 1045 and a vacuum device 1041 are respectively fixedly installed on both sides of the fixed plate 1042. The vacuum chuck 1044 can evacuate the vacuum chuck 1044, so that the vacuum chuck 1044 can adsorb on the stainless steel pipe baffle through the internal and external pressure difference, so as to facilitate taking out the stainless steel pipe baffle. Four hoses 1043 are communicated with the vacuum device 1041.The hose 1043 can move, enabling the vacuum suction cup 1044 to turn smoothly. At the same time, after the vacuum suction cup 1044 is removed, the elastic recovery of the hose 1043 can smoothly complete the turning reset. One end of the hose 1043 is connected to the vacuum suction cup 1044, and the vacuum suction cup 1044 is rotatably mounted on the fixing plate 1042 through a bearing; An automatic material feeding component 103 and a driving component 106 are arranged on the side of the auxiliary frame 101. The automatic material feeding component 103 includes a discharge cylinder 1031. A limiting ring 1035 is arranged at the discharge port of the discharge cylinder 1031. The limiting ring 1035 can limit the stainless steel pipe baffle to prevent the spring 1032 from pushing out the stainless steel pipe baffle. At the same time, the limiting ring 1035 is deformable, so that when the vacuum suction cup 1044 takes out the stainless steel pipe baffle, the limiting ring 1035 can be extruded and deformed, thus smoothly completing the material taking operation of the stainless steel pipe baffle. The discharge cylinder 1031 is used to store the stainless steel pipe baffle. The other end of the discharge cylinder 1031 is provided with an end cover 1033. A spring 1032 is fixedly connected to the end cover 1033. The elastic force of the spring 1032 can drive the elastic plate 1034 to move, so that the elastic plate 1034 can apply a force to the stainless steel pipe baffle, and then smoothly fill the material taking vacancy. The front end of the spring 1032 is fixedly connected to the elastic plate 1034. The elastic plate 1034 is arranged behind the stainless steel pipe baffle. Both sides of the discharge cylinder 1031 are provided with pin holes 1037, and a pin structure 1036 is arranged in the pin holes 1037. The end cover 1033 can be limited through the pin structure 1036 to maintain the stable connection between the end cover 1033 and the discharge cylinder 1031. At the same time, the end cover 1033 can be removed, which is convenient for adding the stainless steel pipe baffle into the discharge cylinder 1031. The pin structure 1036 is arranged on the end cover 1033. The vacuum material grabbing component 104 is located between the automatic material feeding component 103 and the switching feeding component 105. Four clamping components 107 are arranged on the switching feeding component 105. The driving component 106 is in transmission connection with the clamping component 107.

[0023] In this embodiment, the first motor 1052 drives the first rotating shaft 1053 and the disc 1051 to rotate, so that the disc 1051 drives the clamping assembly 107 to rotate, so that the clamping assembly 107 switches positions, so that the stainless steel pipes switch positions, thereby satisfying the continuous feeding operation of the stainless steel pipes. At the same time, the first rotating shaft 1053 also drives the second belt transmission structure 1081 to rotate, and the second belt transmission structure 1081 drives the vacuum gripping assembly 104 to rotate through the transmission shaft 1082, and the vacuum suction cup 107 is switched by rotation. 044 is positioned so that the stainless steel tube baffle corresponds to the stainless steel tube, and the electric push rod 1045 cooperates with the vacuum suction cup 1044 to complete the grabbing of the stainless steel tube baffle and realize the docking with the stainless steel tube, so as to facilitate the contact welding operation, thereby realizing the operation of automatic continuous feeding, thereby improving the welding efficiency, and after the stainless steel tube baffle is taken out, the elastic force of the spring 1032 can push the spring plate 1034 to move, so that the spring plate 1034 pushes the stainless steel tube baffle to move, thereby realizing automatic material replenishment and filling of material taking gaps.

[0024] Example 2: Reference Figures 7 - 9 A stainless steel tube laser welding device includes a driving assembly 106, the driving assembly 106 includes three second rotating shafts 1062, the second rotating shafts 1062 are rotatably mounted on the auxiliary frame 101 through bearings, one end of the second rotating shaft 1062 is fixedly connected with a first gear 1064, and the three second rotating shafts 1062 are transmission-connected through two first belt transmission structures 1063, and the three second rotating shafts 1062 can be linked through the two first belt transmission structures 1063, so as to maintain the synchronous rotation of the second rotating shafts 1062, one of the second rotating shafts 1062 is fixedly connected to the output shaft of the second motor 1061, and the second motor 1061 is fixedly mounted on the auxiliary frame 101; The material clamping assembly 107 includes a three-jaw chuck 1073, which can be used to clamp and fix the stainless steel pipe to prevent the stainless steel pipe from falling off and affecting the welding seal. The three-jaw chuck 1073 is rotatably installed on the disc 1051 through a bearing, and the stainless steel pipe is clamped on the three-jaw chuck 1073. One side of the three-jaw chuck 1073 is fixedly connected to a third rotating shaft 1071, and one end of the third rotating shaft 1071 is fixedly connected to a second gear 1072. The second gear 1072 is meshed with the first gear 1064, and the first gear 1064 and the second gear 1072 are transmitted, so that the second gear 1072 drives the three-jaw chuck 1073 to rotate through the third rotating shaft 1071, and the stainless steel pipe and the stainless steel pipe baffle rotate, so as to realize the operation of the stainless steel pipe and the stainless steel pipe baffle circumferential welding seal. The cooling assembly 102 includes a cooling device 1021 and a shielding frame 1024. The cooling assembly 102 is installed on the auxiliary frame 101. One end of the cooling assembly 102 communicates with the blower 1022. One end of the blower 1022 communicates with the cold transmission pipe 1023. Both ends of the cold transmission pipe 1023 pass through the shielding frame 1024 and are respectively communicated with two air jet pipes 1025. The cooling device 1021 can produce cold air, and then cooperate with the blower 1022 to transport the cold air and discharge it through the air jet pipes 1025, so as to quickly cool down the stainless steel pipe. The air jet pipes 1025 are located in the mesh cylinder 1055. Side baffles 1026 are arranged on both sides of the two air jet pipes 1025. The side baffles 1026 are placed on the inner wall of the mesh cylinder 1055. The side baffles 1026 can block the mesh holes on the left and right sides, thus preventing the cold air from leaking out from the left and right sides. The side baffles 1026 are fixedly connected to the side wall of the shielding frame 1024. The shielding frame 1024 is arranged between two three-wing plates 1054 arranged horizontally, and the shielding frame 1024 is lapped with the disc 1051 and the mesh cylinder 1055.

[0025] In this embodiment: By switching the feeding assembly to change the position of the clamping assembly 107, and then driving the second rotating shaft 1062 to rotate through the second motor 1061, the second rotating shaft 1062 drives two first belt transmission structures 1063 to rotate. The first belt transmission structures 1063 can drive multiple second rotating shafts 1062 to rotate, so that the second rotating shaft 1062 drives the first gear 1064 to transmit with the second gear 1072. The second gear 1072 drives the three-jaw chuck 1073 to rotate, so that the three-jaw chuck 1073 rotates the stainless steel pipe. At the same time, the cooling device 1021 performs refrigeration, and the blower 1022 transports the cold air, so that the cold air is ejected through the air jet pipes 1025, so that the upper and lower stainless steel pipes can be cooled. At the same time, due to the rotation of the stainless steel pipe, the cooling uniformity is improved. The pre-cooling method can reduce the heat affected zone during the welding and sealing process, reduce the change of the metal structure and the decline of the performance in the heat affected zone, and maintain the original performance of the stainless steel pipe. Moreover, pre-cooling can reduce the initial temperature of the stainless steel pipe during welding, which is also helpful for controlling the welding deformation, can reduce the thermal stress generated by the welding high temperature, and reduce the deformation degree of the stainless steel pipe after welding.

[0026] Embodiment 3: Refer to Figures 2 - 5 , a stainless steel pipe laser welding device, includes an auxiliary frame 101. A switching feeding assembly 105 and a cooling assembly 102 are arranged on the auxiliary frame 101. The cooling assembly 102 is combined with the switching feeding assembly 105. A transmission assembly 108 is connected to the switching feeding assembly 105. A vacuum gripping assembly 104 is arranged on the transmission assembly 108; An automatic material ejection assembly 103 and a driving assembly 106 are arranged on the side of the auxiliary frame 101. A vacuum material grabbing assembly 104 is located between the automatic material ejection assembly 103 and the switching feeding assembly 105. Four material clamping assemblies 107 are arranged on the switching feeding assembly 105. The driving assembly 106 is in transmission connection with the material clamping assembly 107. In this embodiment: by switching the feeding component 105, the clamping component 107 and the transmission component 108 can be driven to rotate, and the transmission component 108 can drive the vacuum grabbing component 104 to rotate, so that the vacuum grabbing component 104 switches the feeding, and the clamping component 107 drives the stainless steel tube to rotate, so that it cooperates with the vacuum grabbing component 104 to achieve continuous operation. At the same time, when the stainless steel tube is welded and sealed, the driving component 106 can drive the clamping component 107 to rotate, so that the stainless steel tube can rotate to perform a circle of welding and sealing operations, and at the same time meet the rapid cooling treatment of the stainless steel tube. This method can achieve an automatic production process, make the entire operation simple and convenient, and have low cost. In addition, the cooled stainless steel tube can prevent the problem of scalding when taking materials.

[0027] A method for using a stainless steel tube laser welding device comprises the following steps: S1. When welding and sealing the stainless steel tube, the three-claw chuck 1073 is used to clamp and fix the stainless steel tube, and the electric push rod 1045 is retracted to drive the fixed plate 1042 to move, so that the fixed plate 1042 drives the vacuum suction cup 1044 to move, and the vacuum suction cup 1044 enters the discharge barrel 1031 and contacts the stainless steel tube baffle. The vacuum device 1041 is then used to vacuum the vacuum suction cup 1044, so that the vacuum suction cup 1044 absorbs the stainless steel tube baffle, and then the electric push rod 1045 is extended, so that the fixed plate 1042 drives the vacuum suction cup 1044 and the vacuum baffle to escape from the discharge barrel 1031. After being taken out, the elastic force of the spring 1032 can push the spring plate 1034 forward, so that the stainless steel tube baffle moves forward to fill the gap, and is limited by the limit ring 1035. S2. After the stainless steel tube and the stainless steel tube baffle are clamped, the first motor 1052 drives the first rotating shaft 1053 to rotate, and the first rotating shaft 1053 drives the disc 1051 and the second belt transmission structure 1081 to rotate, so that the disc 1051 drives the clamping assembly 107 to rotate and change its position, so that the stainless steel tube is located at the laser welding device 200 position. When the second belt transmission structure 1081 rotates, the second belt transmission structure 1081 drives the transmission shaft 1082 to rotate, so that the transmission shaft 1082 drives the vacuum material grabbing assembly 104 to rotate through the fixed disk 1083. At this time, the stainless steel tube baffle corresponds to the stainless steel tube, and then the electric push rod 1045 is retracted to make the stainless steel tube baffle contact with the stainless steel tube, and at the same time, the vacuum suction cup 1044 on the other side contacts the stainless steel tube baffle again and adsorbs; S3. After the stainless steel pipe baffle contacts the stainless steel pipe, the laser welding and sealing device 200 performs a welding and sealing operation on the gap between the stainless steel pipe baffle and the stainless steel pipe. At the same time, the second motor 1061 drives the second rotating shaft 1062 to rotate, the second rotating shaft 1062 drives the first belt transmission structure 1063 to rotate, thereby enabling the first gear 1064 to drive the second gear 1072, causing the second gear 1072 to drive the three-jaw chuck 1073 to rotate. The three-jaw chuck 1073 drives the stainless steel pipe to rotate, enabling the laser welding and sealing device 200 to perform a circumferential welding and sealing operation. At the same time, the other two three-jaw chucks 1073 rotate to cool the welded stainless steel pipe and the stainless steel pipe that has not been welded yet; S4. After the stainless steel pipe is welded and sealed, the vacuum device 1041 removes the adsorption of the vacuum chuck 1044 on the stainless steel pipe baffle. At the same time, the electric push rod 1045 drives the vacuum chuck 1044 to take out the stainless steel pipe baffle again through the fixed plate 1042, and the switching feeding component 105 drives the clamping component 107 to rotate and exchange positions again, and then a new round of welding and sealing operation is carried out.

[0028] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A stainless steel tube laser welding device, comprising a welding and sealing auxiliary feeding mechanism, characterized in that: The welding and sealing auxiliary feeding mechanism comprises an auxiliary frame, on which a laser welding and sealing device is fixedly mounted; The auxiliary frame is provided with a switching feeding assembly and a cooling assembly, the cooling assembly is combined with the switching feeding assembly, the switching feeding assembly is connected with a transmission assembly, and the transmission assembly is provided with a vacuum grabbing assembly; An automatic material ejection assembly and a driving assembly are arranged on the side of the auxiliary frame. The vacuum material grabbing assembly is located between the automatic material ejection assembly and the switching feeding assembly. Four material clamping assemblies are arranged on the switching feeding assembly. The driving assembly is transmission-connected to the material clamping assembly.

2. The stainless steel tube laser welding equipment according to claim 1, characterized in that: The vacuum material grabbing assembly includes a fixed plate, on both sides of which electric push rods and vacuum equipment are fixedly installed. Four hoses are connected to the vacuum equipment, one end of the hose is connected to the vacuum suction cup, and the vacuum suction cup is rotatably installed on the fixed plate through a bearing.

3. The stainless steel tube laser welding equipment according to claim 2, characterized in that: The transmission assembly includes a transmission shaft and a second belt transmission structure. The transmission shaft is rotatably mounted on the auxiliary frame through a bearing. One end of the transmission shaft is fixedly connected to a fixed plate, and one side of the fixed plate is fixedly connected to the electric push rod.

4. The stainless steel tube laser welding equipment according to claim 3, characterized in that: The switching feeding assembly includes a first motor, which is fixedly mounted on an auxiliary frame, and an output shaft of the first motor is fixedly connected to a first rotating shaft, which is rotatably mounted on the auxiliary frame through a bearing, and the first rotating shaft is transmission-connected to a transmission shaft through a second belt transmission structure, and one end of the first rotating shaft is fixedly connected to a disc, and one side of the disc is fixedly connected to four three-wing plates, the four three-wing plates separate four clamping assemblies, and a same net cylinder is fixedly connected between the four three-wing plates, the net cylinder is fixedly connected to the middle of the disc, and four groups of mesh holes are provided on the net cylinder.

5. The stainless steel tube laser welding equipment according to claim 4, characterized in that: The driving assembly includes three second rotating shafts, which are rotatably mounted on the auxiliary frame through bearings, one end of the second rotating shaft is fixedly connected to the first gear, and the three second rotating shafts are transmission-connected by two first belt transmission structures, one of the second rotating shafts is fixedly connected to the output shaft of the second motor, and the second motor is fixedly mounted on the auxiliary frame.

6. The stainless steel tube laser welding equipment according to claim 5, characterized in that: The material clamping assembly includes a three-jaw chuck, which is rotatably mounted on a disc through a bearing. The three-jaw chuck clamps a stainless steel pipe. One side of the three-jaw chuck is fixedly connected to a third rotating shaft, one end of the third rotating shaft is fixedly connected to a second gear, and the second gear is meshed with the first gear.

7. The stainless steel tube laser welding equipment according to claim 6, characterized in that: The cooling assembly includes a cooling device and a shielding frame. The cooling assembly is installed on the auxiliary frame. One end of the cooling assembly is connected to the fan, and one end of the fan is connected to the cold delivery pipe. Both ends of the cold delivery pipe pass through the shielding frame and are respectively connected to two jet pipes. The jet pipes are located in the mesh cylinder. Side blocks are provided on both sides of the two jet pipes. The side blocks are built on the inner wall of the mesh cylinder. The side blocks are fixedly connected to the side wall of the shielding frame. The shielding frame is arranged between two transversely arranged three-wing plates, and the shielding frame is overlapped with the disc and the mesh cylinder.

8. The stainless steel tube laser welding equipment according to claim 7, characterized in that: The automatic ejection assembly comprises a discharging barrel, a discharging port of which is provided with a limiting ring, and a stainless steel pipe baffle is stored in the discharging barrel.

9. The stainless steel tube laser welding equipment according to claim 8, characterized in that: An end cover is provided at the other end of the discharge barrel, and a spring is fixedly connected to the end cover. The front end of the spring is fixedly connected to a spring plate, and the spring plate is arranged behind the stainless steel tube baffle. Pin openings are provided on both sides of the discharge barrel, and a latch structure is provided in the pin opening, and the latch structure is arranged on the end cover.

10. The method for using the stainless steel tube laser welding equipment according to claim 9, characterized in that: The following steps are involved: S1. When welding and sealing the stainless steel tube, the stainless steel tube is clamped and fixed by the three-claw chuck, and the electric push rod is retracted to drive the fixed plate to move, so that the fixed plate drives the vacuum suction cup to move, and the vacuum suction cup enters the discharge barrel and contacts the stainless steel tube baffle. The vacuum equipment is then used to vacuum the vacuum suction cup so that the vacuum suction cup absorbs the stainless steel tube baffle. Then the electric push rod is extended so that the fixed plate drives the vacuum suction cup and the vacuum baffle to escape from the discharge barrel. After being taken out, the elastic force of the spring can push the spring plate forward, so that the stainless steel tube baffle moves forward to fill the gap and is limited by the limit ring. S2. After the stainless steel tube and the stainless steel tube baffle are clamped, the first motor drives the first rotating shaft to rotate, and the first rotating shaft drives the disc and the second belt transmission structure to rotate, so that the disc drives the clamping assembly to rotate and change its position, so that the stainless steel tube is located at the laser welding device position. When the second belt transmission structure rotates, the second belt transmission structure drives the transmission shaft to rotate, so that the transmission shaft drives the vacuum material grabbing assembly to rotate through the fixed disk. At this time, the stainless steel tube baffle corresponds to the stainless steel tube, and then the electric push rod is retracted to make the stainless steel tube baffle contact with the stainless steel tube, and at the same time, the vacuum suction cup on the other side contacts the stainless steel tube baffle again and adsorbs; S3. After the stainless steel pipe baffle is in contact with the stainless steel pipe, the gap between the stainless steel pipe baffle and the stainless steel pipe is welded and sealed by a laser welding device. At the same time, the second motor drives the second shaft to rotate, and the second shaft drives the first belt transmission structure to rotate, thereby driving the first gear and the second gear to drive the three-jaw chuck to rotate, and the three-jaw chuck drives the stainless steel pipe to rotate, so that the laser welding device performs a circumferential welding and sealing operation. At the same time, the other two three-jaw chucks rotate to cool the welded stainless steel pipe and the stainless steel pipe that has not been welded and sealed. S4. After the stainless steel pipe is welded and sealed, the vacuum suction cup is used to remove the adsorption of the stainless steel pipe baffle by the vacuum equipment. At the same time, the electric push rod drives the vacuum suction cup to take out the stainless steel pipe baffle again through the fixed plate, and drives the clamping assembly to rotate and exchange positions again by switching the feeding assembly, and then a new round of welding and sealing operation is carried out.

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