Laser welding device for steel pipe

Abstract

The utility model provides a laser welding device for a steel pipe, and relates to the technical field of steel pipe welding. The laser welding device for the steel pipe comprises a rack, a rotating mechanism, a pipe fixing mechanism, a welding mechanism and an adjusting mechanism. The rack comprises a bottom plate, a base, a supporting rod and a top plate which are sequentially connected. The rotating mechanism comprises a rotating table, and the pipe fixing mechanism comprises a first clamp and a second clamp which are used for fixing two steel pipes respectively. The welding mechanism comprises a laser generator and a laser welding head which are connected through an optical fiber. The adjusting mechanism comprises a guide rail, a sliding block, a guide rod, a second sliding sleeve, a fastening nut, a fixing base, a supporting base, a square rod, a pressing plate, a tension spring, a connecting plate, a driving plate and a connecting block. The guide rod is arranged on the sliding block and sleeved with the second sliding sleeve. The supporting seat is fixed to the base, and the bottom of the square rod is rotationally connected to the supporting seat. The laser welding device for the steel pipe can conveniently and quickly adjust the position of the laser welding head according to the length of the steel pipe so as to ensure the welding quality.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe welding technology, and in particular to a laser welding device for steel pipes. Background Technology

[0002] Welding, also known as fusion welding, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature, or high pressure. Modern welding has many energy sources, including gas flames, electric arcs, lasers, electron beams, friction, and ultrasound. In addition to its use in factories, welding can also be carried out in various environments, such as in the field, underwater, and in space. Laser welding is a highly efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding is one of the important applications of laser material processing technology. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process is heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses into the interior through heat conduction. By controlling parameters such as the width, energy, peak power, and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully applied to the precision welding of micro and small parts.

[0003] When welding two steel pipes, the operator needs to adjust the position of the laser welding head appropriately because the two pipes are of different lengths. However, currently, the height of the laser welding head can only be adjusted visually based on the position of the joint between the two steel pipes. This method suffers from low efficiency and difficulty in alignment. Summary of the Invention

[0004] In view of the above situation, this utility model provides a laser welding device for steel pipes, which solves the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A laser welding device for steel pipes may mainly include: a frame, a rotation mechanism, a pipe fixing mechanism, a welding mechanism, and an adjustment mechanism.

[0007] The frame consists of a base plate, a base, support rods, and a top plate connected in sequence.

[0008] The rotary mechanism includes a rotary table, which is located on the upper side of the base.

[0009] The pipe fixing mechanism includes a first clamp and a second clamp for fixing two steel pipes respectively. The first clamp is mounted on a rotary table, and the second clamp is positioned above the first clamp. A first sliding sleeve is sleeved on the support rod. The first sliding sleeve moves up or down via a lifting assembly. A mounting plate for mounting the second clamp is fixed on one side of the first sliding sleeve.

[0010] The welding mechanism comprises a laser generator and a laser welding head connected by an optical fiber.

[0011] The adjusting mechanism comprises a guide rail, a sliding block, a guide rod, a second sliding sleeve, a fastening nut, a fixing seat, a supporting seat, a square rod, a pressing plate, a tension spring, a connecting plate, a driving plate and a connecting block. The guide rail is arranged on the base, the sliding block is matched with the guide rail, the guide rod is arranged on the sliding block, the second sliding sleeve is sleeved with the guide rod, the fastening nut is screwed on one side of the second sliding sleeve, the fixing seat is used for mounting the laser welding head and is fixed on the second sliding sleeve. The supporting seat is fixed on the base, the bottom of the square rod is rotatably connected with the supporting seat, the pressing plate is sleeved with the square rod, and the tension spring for resetting the pressing plate is sleeved on the square rod. The connecting plate is fixedly arranged on the right side of the pressing plate, and the driving plate is connected with the lower right side of the connecting plate through the connecting block. The lower side of the pressing plate, the middle part of the left side of the connecting plate and the axis of the laser welding head are flush, and the driving plate is used for moving the fixing seat upward.

[0012] The first clamp and the second clamp can fix two steel pipes to be welded, the second clamp and the steel pipe fixed on the second clamp are moved upward or downward by the lifting assembly, so that the two steel pipes are butt-jointed. In order to align the laser welding head with the butt-joint of the two steel pipes, the pressing plate is moved upward, and the pressing plate is pressed on the top of the steel pipe fixed on the first clamp under the action of the tension spring. In the process of moving the pressing plate upward, the second sliding sleeve and the laser welding head can be moved by the driving plate. The lower side of the pressing plate, the middle part of the left side of the connecting plate and the axis of the laser welding head are flush, so that the laser welding head can align with the butt-joint of the two steel pipes. After the laser welding head is aligned, the fastening nut is tightened to fix the second sliding sleeve on the guide rod. The laser welding device for the steel pipe can conveniently and quickly adjust the position of the laser welding head according to the length of the steel pipe, so as to ensure the welding quality.

[0013] In some embodiments of the utility model, the above-mentioned rotating mechanism comprises a rotating shaft, a speed reducer and a servo motor which are all located in the base. The upper end of the rotating shaft is fixed to the lower center of the rotating table, the rotating shaft is connected with the base through a bearing, the servo motor is arranged in the base, and the servo motor, the speed reducer and the rotating shaft are sequentially and drivingly connected to drive the rotating table to rotate around its own axis.

[0014] In some embodiments of the utility model, a damping assembly is arranged in the base, and the damping assembly comprises a damping pad, and the servo motor is mounted on the damping pad.

[0015] The arrangement of the damping pad can weaken the vibration caused by the operation of the servo motor, so as to prevent the laser welding head from shaking too much.

[0016] In some embodiments of the utility model, the first clamp comprises a plug-in sleeve for plugging the steel pipe.

[0017] The steel pipe is plugged into the plug-in sleeve, so that the steel pipe can be fixed.

[0018] In some embodiments of the utility model, the second clamp comprises a movable rod, a wedge block, an arc block, a connecting rod and a support plate. The movable rod is inserted into the mounting plate, the lower end of the movable rod has a tapered driving part, at least three wedge blocks are arranged along the circumference of the driving part, the support plate is fixed to the lower side of the mounting plate, the connecting rod is transversely inserted into the support plate, the wedge block and the arc block are connected through the connecting rod, and the arc block can abut the inner side of the steel pipe. The movable rod is moved up or down through the driving assembly.

[0019] By moving the movable rod down through the driving assembly, the wedge block and the arc block can be pushed to move transversely through the driving part, so that the steel pipe is fixed from the inside of the steel pipe through the at least three wedge blocks.

[0020] In some embodiments of the utility model, the upper end of the movable rod is fixedly provided with a fixed plate, and the driving assembly comprises a first telescopic cylinder mounted on the top plate, and the movable end of the first telescopic cylinder is fixed to the fixed plate.

[0021] In some embodiments of the utility model, the lifting assembly comprises a second telescopic cylinder mounted on the top plate, and the movable end of the second telescopic cylinder is fixedly connected with the first sliding sleeve.

[0022] In some embodiments of the utility model, the second sliding sleeve is fixedly provided with a support block, and the support block is fixedly provided with a blower, a nozzle and a baffle. The blower and the nozzle are connected through a conduit, the baffle is arranged obliquely, and the right end of the baffle is located above the nozzle.

[0023] The arrangement of the blower, the nozzle and the baffle can blow the wind to the left of the laser welding head to remove the high-temperature airflow in front of the laser welding head, which is beneficial to protect the laser welding head and prolong the service life of the laser welding head. In addition, when the laser generator is arranged below the baffle, the wind blown by the nozzle can also cool the laser generator.

[0024] The utility model discloses at least has following advantages or beneficial effects:

[0025] 1. The first clamp and the second clamp can fix two steel pipes to be welded, the lifting assembly moves up or down the second clamp and the steel pipe fixed on the second clamp, so as to butt joint the two steel pipes. In order to align the laser welding head with the butt joint of the two steel pipes, the pressing plate can be moved up, so that the pressing plate is pressed on the top of the steel pipe fixed on the first clamp under the action of the tension spring. During the process of moving up the pressing plate, the second sliding sleeve and the laser welding head can be moved through the driving plate. The lower side of the pressing plate, the middle part of the left side of the connecting plate and the axis of the laser welding head are flush to align the laser welding head with the butt joint of the two steel pipes. After the laser welding head is aligned, the second sliding sleeve can be fixed on the guide rod by tightening the fixing nut. The laser welding device for steel pipe can conveniently and quickly adjust the position of the laser welding head according to the length of the steel pipe, so as to ensure the welding quality.

[0026] 2. The setting of the damping pad can weaken the vibration caused by the operation of the servo motor, so as to avoid the excessive shaking of the laser welding head.

[0027] 3. By driving the movable rod downward, the wedge-shaped block and the arc-shaped block can be pushed to move laterally by the driving part, so as to fix the steel pipe from the inside of the steel pipe by the at least three wedge-shaped blocks.

[0028] 4. The setting of the air blower, the nozzle and the baffle can blow the wind to the left of the laser welding head, so as to take away the high-temperature airflow in front of the laser welding head, which is beneficial to protect the laser welding head and prolong the service life of the laser welding head. In addition, when the laser generator is arranged below the baffle, the wind blown by the nozzle can also play a role in cooling the laser generator. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 The structure schematic diagram of the laser welding device for steel pipe provided by the embodiment of the present application;

[0031] Figure 2 The structure schematic diagram of the laser welding device for steel pipe provided by the embodiment of the present application;

[0032] Figure 3 The structure schematic diagram of the second clamp provided by the embodiment of the present application;

[0033] Figure 4 The structure schematic diagram of the air blower, the nozzle and the baffle provided by the embodiment of the present application.

[0034] Icon: 111 - base plate, 112 - base, 113 - strut, 114 - top plate, 115 - first sliding sleeve, 116 - mounting plate, 121 - rotary table, 122 - rotating shaft, 123 - speed reducer, 124 - servo motor, 131 - insertion cylinder, 132 - movable rod, 133 - wedge-shaped block, 134 - arc-shaped block, 135 - connecting rod, 136 - support plate, 137 - driving part, 141 - laser generator, 142 - laser welding head, 151 - guide rail, 152 - sliding block, 153 - guide rod, 154 - second sliding sleeve, 155 - fastening nut, 156 - fixing seat, 157 - support seat, 158 - square rod, 159 - pressing plate, 161 - tension spring, 162 - connecting plate, 163 - driving plate, 164 - connecting block, 171 - shock pad, 181 - fixing plate, 182 - first telescopic cylinder, 191 - second telescopic cylinder, 201 - support block, 202 - blower, 203 - nozzle, 204 - baffle. DETAILED DESCRIPTION

[0035] Hereinafter, only certain exemplary embodiments are simply described. As can be appreciated by those skilled in the art, the described embodiments can be modified in various different manners without departing from the spirit or scope of the embodiments of the present application. Therefore, the drawings and the description are considered to be essentially exemplary rather than limiting.

[0036] In the description of the embodiments of the present application, it is understood that the terms "center", "transverse", "upper", "lower", "left", "right", "top", "bottom", "inner", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0037] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0038] In the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, can be electrically connected, or can be communicated; can be directly connected, can be indirectly connected through an intermediate medium, can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] The embodiments of the present application will be described in detail below with reference to the drawings.

[0040] Embodiment 1

[0041] Please refer to Figures 1-4 The embodiment provides a laser welding device for steel pipes, which mainly can include: a rack, a rotating mechanism, a pipe fixing mechanism, a welding mechanism and an adjusting mechanism.

[0042] The rack includes a bottom plate 111, a base 112, a support rod 113 and a top plate 114 connected in sequence.

[0043] The rotating mechanism includes a rotating table 121, and the rotating table 121 is arranged on the upper side of the base 112.

[0044] The pipe fixing mechanism includes a first clamp and a second clamp respectively used for fixing two steel pipes, the first clamp is arranged on the rotating table 121, and the second clamp is arranged above the first clamp. A first sliding sleeve 115 is sleeved on the support rod 113, the first sliding sleeve 115 is moved upward or downward through a lifting assembly, and a mounting plate 116 for mounting the second clamp is fixed on one side of the first sliding sleeve 115.

[0045] The welding mechanism includes a laser generator 141 and a laser welding head 142 connected through an optical fiber.

[0046] The adjusting mechanism comprises a guide rail 151, a sliding block 152, a guide rod 153, a second sliding sleeve 154, a fastening nut 155, a fixing seat 156, a supporting seat 157, a square rod 158, a pressing plate 159, a tension spring 161, a connecting plate 162, a driving plate 163 and a connecting block 164. The guide rail 151 is arranged on the base 112, the sliding block 152 is matched with the guide rail 151, the guide rod 153 is arranged on the sliding block 152, the second sliding sleeve 154 is sleeved on the guide rod 153, the fastening nut 155 is screwed on one side of the second sliding sleeve 154, and the fixing seat 156 is used for mounting the laser welding head 142 and is fixed on the second sliding sleeve 154. The supporting seat 157 is fixed on the base 112, the bottom of the square rod 158 is rotatably connected to the supporting seat 157, the pressing plate 159 is sleeved on the square rod 158, and the tension spring 161 for resetting the pressing plate 159 is sleeved on the square rod 158. The connecting plate 162 is fixedly arranged on the right side of the pressing plate 159, and the driving plate 163 is connected to the lower right of the connecting plate 162 through the connecting block 164. The lower side of the pressing plate 159, the middle part of the left side of the connecting plate 162 and the axis of the laser welding head 142 are flush, and the driving plate 163 is used for moving the fixing seat 156 upward.

[0047] The first clamp and the second clamp can fix two steel pipes to be welded, the second clamp and the steel pipe fixed on the second clamp are moved upward or downward by the lifting assembly, so that the two steel pipes are butt-jointed. In order to align the laser welding head 142 with the butt joint of the two steel pipes, the pressing plate 159 is moved upward, and the pressing plate 159 is pressed on the top of the steel pipe fixed on the first clamp under the action of the tension spring 161. During the upward movement of the pressing plate 159, the second sliding sleeve 154 and the laser welding head 142 are moved by the driving plate 163, and the lower side of the pressing plate 159, the middle part of the left side of the connecting plate 162 and the axis of the laser welding head 142 are flush, so that the laser welding head 142 can align with the butt joint of the two steel pipes. After the laser welding head 142 is aligned, the fastening nut 155 is tightened to fix the second sliding sleeve 154 on the guide rod 153. The laser welding device for steel pipes can conveniently and quickly adjust the position of the laser welding head 142 according to the length of the steel pipe, so as to ensure the welding quality.

[0048] Specifically:

[0049] The rotating mechanism further comprises a rotating shaft 122, a speed reducer 123 and a servo motor 124, which are all located in the base 112. The upper end of the rotating shaft 122 is fixed to the lower center of the rotating table 121, the rotating shaft 122 is connected to the base 112 through a bearing, the servo motor 124 is arranged in the base 112, and the servo motor 124, the speed reducer 123 and the rotating shaft 122 are sequentially and drivingly connected to drive the rotating table 121 to rotate around its own axis.

[0050] A damping assembly is arranged in the base 112, and the damping assembly comprises a damping pad 171, and the servo motor 124 is arranged on the damping pad 171. The damping pad 171 can weaken the vibration caused by the operation of the servo motor 124, so as to prevent the laser welding head 142 from shaking excessively.

[0051] The first clamp comprises a plug barrel 131 for plugging the steel pipe. The steel pipe is plugged in the plug barrel 131, so as to fix the steel pipe.

[0052] The second clamp comprises a movable rod 132, wedge blocks 133, arc blocks 134, a connecting rod 135 and a support plate 136. The movable rod 132 is plugged on the mounting plate 116, the lower end of the movable rod 132 is provided with a tapered driving portion 137, at least three wedge blocks 133 are arranged along the circumference of the driving portion 137, the support plate 136 is fixed on the lower side of the mounting plate 116, the connecting rod 135 is transversely plugged on the support plate 136, the wedge blocks 133 and the arc blocks 134 are connected through the connecting rod 135, and the arc blocks 134 can abut against the inner side of the steel pipe. The movable rod 132 is moved upward or downward through the driving assembly. The movable rod 132 is moved downward through the driving assembly, so as to push the wedge blocks 133 and the arc blocks 134 to move transversely through the driving portion 137, so as to fix the steel pipe through the at least three wedge blocks 133 from the inside of the steel pipe.

[0053] The upper end of the movable rod 132 is fixedly provided with a fixed plate 181, and the driving assembly comprises a first telescopic cylinder 182 arranged on the top plate 114, and the movable end of the first telescopic cylinder 182 is fixedly connected with the fixed plate 181.

[0054] The lifting assembly comprises a second telescopic cylinder 191 arranged on the top plate 114, and the movable end of the second telescopic cylinder 191 is fixedly connected with the first sliding sleeve 115.

[0055] The second sliding sleeve 154 is fixedly provided with a support block 201, the support block 201 is fixedly provided with a blower 202, a nozzle 203 and a baffle 204, the blower 202 and the nozzle 203 are connected through a pipeline, the baffle 204 is arranged obliquely, and the right end of the baffle 204 is located above the nozzle 203. The blower 202, the nozzle 203 and the baffle 204 can blow the wind to the left of the laser welding head 142, so as to take away the high-temperature airflow in front of the laser welding head 142, which is beneficial to protect the laser welding head 142 and prolong the service life of the laser welding head 142. In addition, when the laser generator 141 is arranged below the baffle 204, the wind blown by the nozzle 203 can also play a role in cooling the laser generator 141.

[0056] The working principle of the laser welding device for the steel pipe is as follows:

[0057] Take a steel pipe is inserted in the insertion tube 131, and take another steel pipe, and its one end from bottom to top is sleeved on the arc block 134, then the arc block 134 is expanded outwardly by moving the movable rod 132 downwardly, so as to fix the steel pipe. After fixing two steel pipes, first move the sliding block 152 to the vicinity of the guide rod 153, then rotate the square rod 158, so that the pressing plate 159 faces the lower steel pipe, then pull the pressing plate 159 to the upper side of the steel pipe, then loosen the pressing plate 159, so that the pressing plate 159 is pressed on the top of the steel pipe. In the process of moving the pressing plate 159, the driving plate 163 drives the second sliding sleeve 154 and the laser welding head 142 to move upwardly. Since the lower side of the pressing plate 159, the middle part of the left side of the connecting plate 162 and the axis of the laser welding head 142 are flush, the laser welding head 142 can be conveniently and quickly aligned with the butt joint of the two steel pipes. After the laser welding head 142 is aligned, the fastening nut 155 is tightened to fix the second sliding sleeve 154 on the guide rod 153.

[0058] The preferred embodiments of the present application have been described above, but the present application is not limited to the above. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser welding device for a steel pipe, characterized by comprising: The utility model relates to a steel pipe welding device, including: The rack, the rotation mechanism, the pipe fixing mechanism, the welding mechanism and the adjusting mechanism; The rack includes the bottom plate, the base, the support pole and the top plate which are connected in sequence; The rotation mechanism includes the rotary table, and the rotary table is arranged on the upside of the base; The pipe fixing mechanism includes the first clamp and the second clamp for fixing two steel pipes respectively, the first clamp is arranged on the rotary table, and the second clamp is arranged above the first clamp;The first sliding sleeve is sleeved on the support pole, the first sliding sleeve is moved up or down through the lifting assembly, one side of the first sliding sleeve is fixedly provided with the mounting plate for installing the second clamp; The welding mechanism includes the laser generator and the laser welding head connected through the optical fiber; The adjusting mechanism includes the guide rail, the sliding block, the guide rod, the second sliding sleeve, the fastening nut, the fixing seat, the supporting seat, the square rod, the pressing plate, the tension spring, the connecting plate, the driving plate and the connecting block;The guide rail is arranged on the base, the sliding block is matched with the guide rail, the guide rod is arranged on the sliding block, the second sliding sleeve is sleeved on the guide rod, one side of the second sliding sleeve is screwed with the fastening nut, the fixing seat is used for installing the laser welding head and is fixed on the second sliding sleeve;The supporting seat is fixed on the base, the bottom of the square rod is rotatably connected to the supporting seat, the pressing plate is sleeved on the square rod, and the tension spring for resetting the pressing plate is sleeved on the square rod;The connecting plate is fixedly arranged on the right side of the pressing plate, and the driving plate is connected to the lower right of the connecting plate through the connecting block;The axis of the laser welding head is flush with the lower side of the pressing plate and the middle part of the left side of the connecting plate, and the driving plate is used for moving the fixing seat up.

2. The laser welding apparatus for a steel pipe according to claim 1, characterized by The rotation mechanism includes the rotating shaft, the speed reducer and the servo motor which are all located in the base;The upper end of the rotating shaft is fixed to the lower center of the rotary table, the rotating shaft is connected to the base through the bearing, the servo motor is arranged in the base, and the servo motor, the speed reducer and the rotating shaft are sequentially and drivingly connected.

3. The laser welding apparatus for a steel pipe according to claim 2, characterized by A damping assembly is arranged in the base, and the damping assembly includes a damping pad, and the servo motor is mounted on the damping pad.

4. The laser welding apparatus for a steel pipe according to claim 1, characterized by The first clamp includes a plug barrel for plugging the steel pipe.

5. The laser welding apparatus for a steel pipe according to claim 1, characterized by The second clamp includes a movable rod, a wedge block, an arc block, a connecting rod and a supporting plate;The movable rod is plugged into the mounting plate, the lower end of the movable rod has a tapered driving portion, at least three wedge blocks are arranged at intervals along the circumference of the driving portion, the supporting plate is fixed to the lower side of the mounting plate, the connecting rod is transversely plugged into the supporting plate, the wedge block and the arc block are connected through the connecting rod, and the arc block can abut against the inner side of the steel pipe;The movable rod is moved up or down through the driving assembly.

6. The laser welding apparatus for a steel pipe according to claim 5, characterized by The upper end of the movable rod is fixedly provided with a fixing plate, and the driving assembly includes a first telescopic cylinder mounted on the top plate, and the movable end of the first telescopic cylinder is fixed to the fixing plate.

7. The laser welding apparatus for a steel pipe according to claim 1, characterized by The lifting assembly includes a second telescopic cylinder mounted on the top plate, and the movable end of the second telescopic cylinder is fixedly connected to the first sliding sleeve.

8. The laser welding apparatus for a steel pipe according to any one of claims 1 to 7, characterized by The second sliding sleeve is fixed with a support block, the support block is fixed with a blower, a nozzle and a baffle, the blower and the nozzle are connected through a conduit, the baffle is arranged obliquely, and the right end of the baffle is located above the nozzle.

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