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CN-121972811-A - Shell-shaped metal piece laser welding device

CN121972811ACN 121972811 ACN121972811 ACN 121972811ACN-121972811-A

Abstract

The invention relates to the technical field of laser welding equipment, and particularly discloses a shell-shaped metal piece laser welding device which comprises a frame, a welding unit and a clamping unit, wherein the clamping unit comprises a rotary workbench and an outer shaping die, the outer shaping die is positioned above the rotary workbench and is fixedly provided with a plurality of inner shaping columns and a plurality of support arms, the inner shaping columns are provided with compression air bags, the support arms are fixedly provided with a cylinder body, a piston and a thrust spring are arranged in the cylinder body, the piston is fixedly connected with a pull rod, the inner cavity of the cylinder body is communicated with the compression air bags through an air path, and a rotary driving device and a linear driving device are arranged in the frame. The outer shaping die is matched with the rotary workbench, has shaping and clamping functions, can finish welding of a longitudinal joint of the frame body, an butt joint of the frame body and the bottom plate and accessory parts at one time, avoids repeated clamping, remarkably improves welding efficiency and accuracy consistency, and can extend into the frame body to weld inner side welding seams and the inner accessory parts, so that more comprehensive welding coverage is realized.

Inventors

  • LIU YONG

Assignees

  • 东莞市永盛鸿星金属制品有限公司

Dates

Publication Date
20260505
Application Date
20260403

Claims (10)

  1. 1. The utility model provides a shell form metalwork laser welding device, includes frame, welding unit and clamping unit, its characterized in that: The welding unit comprises an industrial robot and a laser welding head which are connected; The clamping unit comprises a rotary workbench and an outer shaping die, wherein the rotary workbench is arranged on a frame and can horizontally rotate, a plurality of positioning parts are fixedly arranged on the upper side of the rotary workbench, the outer shaping die adopts a frame-shaped hollow structure and is positioned above the rotary workbench, limiting steps are arranged on the periphery of the inner side of the outer shaping die, a plurality of inner shaping columns distributed on the inner side of the outer shaping columns and a plurality of support arms distributed on the outer side of the outer shaping columns are fixedly arranged on the outer shaping die, a compression air bag is arranged on the inner shaping columns, gaps are reserved between the compression air bag and the inner wall of the outer shaping die, a vertically arranged cylinder body is fixedly arranged on the support arms, a piston and a thrust spring which are distributed up and down are arranged in the cylinder body, a central hole is formed in the bottom of the cylinder body, air holes are formed in the side of the cylinder body, the piston is fixedly connected with a pull rod which extends downwards, the pull rod penetrates through the central hole and is in a sealing sliding fit with the piston, the lower end of the pull rod extends to the lower part of the rotary workbench, and the air holes are positioned on the lower side of the piston and are communicated with the compression air bag through an air path; The frame is internally provided with a rotary driving device in transmission connection with the rotary workbench and a linear driving device in transmission connection with the lower end of the pull rod.
  2. 2. The laser welding apparatus for shell-like metal parts according to claim 1, wherein the outer shaping mold has a polygonal frame structure, and the arm is fixed to the outer side of the corner of the outer shaping mold.
  3. 3. The laser welding device for shell-shaped metal pieces according to claim 1, wherein the frame is provided with a linear guide rail, the linear guide rail is provided with a slide seat and a driving mechanism for adjusting the position of the slide seat, and the industrial robot is fixed on the slide seat.
  4. 4. The laser welding device for shell-shaped metal parts according to claim 1, wherein one end of the support arm far away from the outer shaping mold is fixedly connected with a placement seat, a guide hole is formed in the placement seat, the lower end of the cylinder body is fixedly connected with the placement seat, and the pull rod penetrates through the guide hole and is in sliding fit with the guide hole.
  5. 5. The laser welding device for shell-shaped metal parts according to claim 1, wherein the compression air bag is in a circular tube shape and made of rubber elastic materials, is sleeved outside the inner shaping column, two ends of the compression air bag are tightly fastened with the inner shaping column through fastening rings, a runner is arranged inside the inner shaping column, one end of the runner is communicated with the inner cavity of the compression air bag, and the other end of the runner is connected with an air hole on the side wall of the cylinder through an air passage.
  6. 6. The laser welding apparatus for shell-like metal members according to claim 5, wherein a plurality of pressing air bags are arranged in the same inner shaping column in the axial direction.
  7. 7. The laser welding device for shell-shaped metal pieces according to claim 1, wherein the rotary table is fixedly connected with a vertical downward extending main shaft, the main shaft is rotatably connected with a shaft seat fixed on the frame, the output end of the rotary driving device is in transmission connection with the main shaft, and the linear driving device is independently configured for each pull rod.
  8. 8. The laser welding apparatus for shell-like metal parts according to claim 1, wherein the lower ends of all the tie rods are fixedly connected together with a synchronizing frame, and the synchronizing frame is in driving connection with the linear driving device.
  9. 9. The laser welding device for shell-shaped metal pieces according to claim 8, wherein a base is arranged below the rotary workbench, the rotary workbench is fixedly connected with the base through a plurality of upright posts, the linear driving device is fixed on the base, a main shaft extending vertically downwards is fixedly connected to the center of the base, the main shaft is rotatably connected with an axle seat fixed on the frame, and the output end of the rotary driving device is in transmission connection with the main shaft.
  10. 10. The laser welding device for shell-shaped metal pieces according to claim 1, wherein in a clamping state, a space is reserved between the lower edge of the outer shaping die and the rotary workbench, so that a joint between the frame body and the bottom plate is completely exposed, and a to-be-welded area on the frame body corresponds to a hollowed-out part of the outer shaping die.

Description

Shell-shaped metal piece laser welding device Technical Field The invention relates to the technical field of laser welding equipment, in particular to a shell-shaped metal piece laser welding device. Background The shell-shaped metal parts (such as various container shells, protective covers and the like) are widely applied in the industry field, and the structure of the shell-shaped metal parts is generally shown in fig. 1, and the shell-shaped metal parts comprise a frame body 2 formed by enclosing metal plates, a bottom plate 1 matched with the frame body, accessory parts and the like. In the process, it is generally necessary to weld the longitudinal seam of the frame, the butt seam of the frame and the bottom plate, and the accessory parts. In the conventional welding process, the structural stability of the frame body is poor before welding the longitudinal seam, the frame body needs to be temporarily fixed and shaped by a special shaping clamp, the clamp is removed after the welding of the longitudinal seam is finished, and then the frame body and the bottom plate need to be clamped again to weld the two opposite seams. Meanwhile, the traditional clamp is often closed in structure, a shielding object exists at the port, if welding is needed to be conducted on the inner side and the outer side of the shell-shaped metal piece, welding of welding seams or hidden parts in the frame body is difficult to achieve, and the clamping posture of the workpiece is often needed to be adjusted for multiple times or the clamp is needed to be replaced. The method for sectioning and multi-time clamping is complex in operation and low in efficiency, and error accumulation is easily caused by multi-time clamping, so that the consistency of welding position precision and structural shape is affected. In addition, in order to realize multi-position clamping, a plurality of sets of clamps and driving mechanisms are required to be configured, so that the equipment is large in structure, high in cost and high in energy consumption. Therefore, a welding device capable of realizing one-time clamping and multi-position welding of shell-shaped metal parts and having high precision, high efficiency and compact structure is needed, so as to meet the processing requirements of modern production on high quality and high efficiency. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a shell-shaped metal piece laser welding device so as to solve the technical problems of lower efficiency and precision caused by the need of adjusting clamping states for multiple times in the welding process of the shell-shaped metal piece. Aiming at the technical purposes, the invention is realized by adopting the following technical scheme: A shell-shaped metal piece laser welding device comprises a frame, a welding unit and a clamping unit; The welding unit comprises an industrial robot arranged on a frame and a laser welding head carried by a tail end flange of the industrial robot; The clamping unit comprises a rotary workbench and an outer shaping die, wherein the rotary workbench is arranged on a frame and can horizontally rotate, a plurality of positioning parts are fixedly arranged on the upper side of the rotary workbench, the outer shaping die adopts a frame-shaped hollow structure and is positioned above the rotary workbench, limiting steps are arranged on the periphery of the inner side of the outer shaping die, a plurality of inner shaping columns distributed on the inner side of the outer shaping columns and a plurality of support arms distributed on the outer side of the outer shaping columns are fixedly arranged on the outer shaping die, a compression air bag is arranged on the inner shaping columns, gaps are reserved between the compression air bag and the inner wall of the outer shaping die, a vertically arranged cylinder body is fixedly arranged on the support arms, a piston and a thrust spring which are distributed up and down are arranged in the cylinder body, a central hole is formed in the bottom of the cylinder body, air holes are formed in the side of the cylinder body, the piston is fixedly connected with a pull rod which extends downwards, the pull rod penetrates through the central hole and is in a sealing sliding fit with the piston, the lower end of the pull rod extends to the lower part of the rotary workbench, and the air holes are positioned on the lower side of the piston and are communicated with the compression air bag through an air path; The frame is internally provided with a rotary driving device in transmission connection with the rotary workbench and a linear driving device in transmission connection with the lower end of the pull rod. The working principle of the shell-shaped metal piece laser welding device is as follows: when the device is in an initial state, the outer shaping die is in a high position. The frame body is placed on the bottom plate and is positione