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CN-121972784-A - Automobile workpiece welding fixture

CN121972784ACN 121972784 ACN121972784 ACN 121972784ACN-121972784-A

Abstract

The invention discloses a welding fixture for an automobile workpiece, which is used for welding and positioning a stamping part of a vehicle body cross beam and a stamping sheet metal part. The device comprises a base, a stand column, a clamping and positioning mechanism, a mounting beam, a fixing frame, a rotating frame, a pressing frame, a lifting mechanism and a bracket. The mounting beam is provided with a fixing frame, the front bearing beam and the clamping and positioning mechanism support the workpiece together, and the top rotating frame is driven by a lever type overturning cylinder to drive the lower pressing frame to be matched with the bracket, clamp the stamping sheet metal part and expose the welding part, thereby facilitating the resistance welding operation. The fixture is accurate in positioning, stable in clamping, convenient to operate, capable of protecting workpieces, suitable for mass production and capable of improving welding precision and efficiency.

Inventors

  • WU HAIBO

Assignees

  • 宣城鑫途智能装备有限公司

Dates

Publication Date
20260505
Application Date
20260310

Claims (9)

  1. 1. The automobile workpiece welding fixture is characterized by comprising a base (1), wherein upright posts (2) are vertically and fixedly arranged at the tops of two sides of the base (1), and clamping and positioning mechanisms (3) are arranged at the top ends of the two groups of upright posts (2); A plurality of groups of bearing beams (501) are fixedly arranged on the front side of the fixed frame (5), a plurality of groups of rotating frames (601) are rotatably connected to the top of the fixed frame (5) through rotating shafts, the rotating frames (601) are turned through lever type turning cylinder driving, transverse frames (602) are fixedly connected to two sides of the top of the rotating frames (601), and a pressing frame (603) is fixedly connected to the free end of each transverse frame (602); The lifting mechanism (7) is fixedly arranged in the middle of the base (1), lifting beams (701) are fixedly arranged at the top ends of the lifting mechanisms (7), a plurality of groups of supporting rods (702) are vertically and fixedly connected to the top of each lifting beam (701), brackets (703) are arranged at the top ends of each group of supporting rods (702), the number of the brackets (703) in each group is equal to that of the pressing frames (603) in each group and are in one-to-one correspondence, the bearing beams (501) are used for bearing automobile body beam stamping parts (8), and the brackets (703) are used for bearing stamping sheet metal parts (9).
  2. 2. The automobile workpiece welding fixture according to claim 1, wherein the clamping and positioning mechanism (3) comprises a mounting plate (301), a bearing plate (304) is arranged on the upper portion of the mounting plate (301), positioning columns (305) are vertically connected to the top of the bearing plate (304), clamping frames (302) are rotatably connected to the two sides of the mounting plate (301) through rotating shafts, opening and closing of the clamping frames (302) are controlled by a pneumatic driving assembly, the pneumatic driving assembly comprises a cylinder and a connecting rod, a cylinder body of the cylinder is hinged to the mounting plate (301), a piston rod of the cylinder is hinged to the clamping frames (302), and the clamping frames (302) are rotatably driven around the rotating shafts through expansion and contraction of the piston rod of the cylinder to achieve transverse clamping and positioning of a vehicle body beam stamping part (8).
  3. 3. The welding fixture for automobile workpieces according to claim 1, wherein the inner walls of the two groups of clamping frames (302) are vertically and slidably connected with buckling claws (303), lifting of the buckling claws (303) is driven by a vertically arranged pneumatic telescopic cylinder, the pneumatic telescopic cylinder is fixedly arranged at the top of the clamping frames (302), a piston rod of the pneumatic telescopic cylinder is fixedly connected with the buckling claws (303), the buckling claws (303) are driven to lift through telescopic driving of the piston rod of the pneumatic telescopic cylinder, and the buckling claws (303) are matched with the bearing disc (304) to achieve longitudinal clamping and positioning of the automobile body beam stamping part (8).
  4. 4. The automotive workpiece welding fixture according to claim 1, characterized in that the carrier beams (501) are positioned in the same horizontal plane as the two groups of carrier plates (304) and jointly support the body cross beam stamping (8).
  5. 5. The automobile workpiece welding fixture according to claim 1, wherein the lifting mechanism (7) is used for driving the bracket (703) to jack up the stamping sheet metal part (9) so that the stamping sheet metal part (9) abuts against the lower side of the automobile body beam stamping part (8). The rotating frame (601) can drive the transverse frame (602) and the pressing frame (603) to turn over, so that the pressing frame (603) and the bracket (703) are matched to clamp and position the stamping sheet metal part (9).
  6. 6. The welding fixture for automobile workpieces according to claim 2, wherein through holes are formed in two ends of the automobile body cross beam stamping part (8), and the through holes are used for being sleeved on the positioning columns (305) to achieve positioning.
  7. 7. The automobile workpiece welding fixture according to claim 1, characterized in that brackets (502) are arranged between the bottom of the mounting beam (4) and the fixing frame (5).
  8. 8. The welding fixture for automobile workpieces according to claim 1, characterized in that an elastic pressing block or a wear-resistant positioning block is arranged on the lower side of the pressing frame (603) and is used for flexibly contacting and positioning with the stamping sheet metal part (9).
  9. 9. A welding jig for automotive workpieces according to claim 3, characterized in that the lower end face of the buckle claw (303) is provided with an anti-slip embossing or soft pressing pad for improving the holding stability.

Description

Automobile workpiece welding fixture Technical Field The invention relates to the technical field of automobile part machining, in particular to an automobile workpiece welding fixture. Background In the production process of automobile parts, the welding of a vehicle body cross beam stamping part and a stamping sheet metal part is one of key procedures, and the welding precision directly influences the structural strength and the assembly precision of an automobile body. At present, the existing welding fixture has the problems of inaccurate positioning, poor clamping stability, complex operation and the like, namely, on one hand, the vehicle body cross beam stamping part is clamped in a single direction, offset is easy to occur, welding dislocation is caused, on the other hand, the lamination positioning of the stamping sheet metal part and the vehicle body cross beam stamping part is inconvenient, the surface of a workpiece is easy to damage in the clamping process, and meanwhile, the fixture is unreasonable in structural design, so that the workpiece clamping efficiency is low, and the production beat is influenced. In addition, the driving mechanism of the existing clamp is not perfect in design, the opening and closing of the clamping frame, the lifting of the buckling claw and the turning action coordination of the rotating frame are poor, clamping stagnation and inaccurate positioning are easy to occur, and the requirements on welding precision and efficiency in mass production cannot be met. Therefore, an automobile workpiece welding fixture with accurate positioning, stable clamping, convenient operation and strong suitability is needed, and the defects in the prior art are overcome. Disclosure of Invention In order to solve the technical problems in the background art, the invention provides an automobile workpiece welding fixture. The invention provides an automobile workpiece welding fixture, which comprises a base, wherein upright posts are vertically and fixedly arranged at the tops of two sides of the base, and clamping and positioning mechanisms are assembled at the top ends of the two groups of upright posts; A horizontally arranged mounting beam is fixedly connected between the two groups of upright posts; the mounting beam is fixedly provided with a fixing frame, the front side of the fixing frame is fixedly provided with a plurality of groups of bearing beams, the top of the fixing frame is rotationally connected with a plurality of groups of rotating frames through a rotating shaft, and the rotating frames are turned over through a lever type turning cylinder; The middle part of the base is fixedly provided with a lifting mechanism, the top end of the lifting mechanism is fixedly provided with a lifting beam, the top of the lifting beam is vertically and fixedly connected with a plurality of groups of supporting rods, the top end of each group of supporting rods is provided with brackets, each group of brackets is equal to each group of pressing frames in number and is arranged in a one-to-one correspondence manner, the bearing beam is used for bearing a vehicle body cross beam stamping part, and the brackets are used for bearing stamping sheet metal parts. Preferably, the clamping and positioning mechanism comprises a mounting plate, a bearing plate is arranged on the upper portion of the mounting plate, a positioning column is vertically connected to the top of the bearing plate, clamping frames are rotatably connected to the two sides of the mounting plate through rotating shafts, opening and closing of the clamping frames are controlled by a pneumatic driving assembly, the pneumatic driving assembly comprises a cylinder and a connecting rod, a cylinder body of the cylinder is hinged to the mounting plate, a piston rod of the cylinder is hinged to the clamping frames, and the clamping frames are driven to rotate around the rotating shafts through expansion of the piston rod of the cylinder to transversely clamp and position stamping parts of a vehicle body beam. Preferably, the inner walls of the clamping frames are vertically and slidably connected with buckling claws, lifting of the buckling claws is driven by a vertically arranged pneumatic telescopic cylinder, the pneumatic telescopic cylinder is fixedly arranged at the top of the clamping frame, a piston rod of the pneumatic telescopic cylinder is fixedly connected with the buckling claws, the buckling claws are driven to lift through the telescopic driving of the piston rod of the pneumatic telescopic cylinder, and the buckling claws are matched with the bearing disc to achieve longitudinal clamping and positioning of the stamping parts of the vehicle body cross beam. Preferably, the bearing beam and the two groups of bearing discs are positioned on the same horizontal plane, and jointly support the stamping part of the vehicle body cross beam. Preferably, the lifting mechanism is used for driving the bracket to jack up the st