A positioning fixture for welding the MacPherson suspension tower and the main body

Abstract

The invention discloses a positioning fixture for welding a MacPherson suspension tower and a main body. The fixture includes a tower body positioning mechanism and a suspension main body positioning mechanism, which are respectively fixed on the fixture table, and the tower body positioning mechanism is provided with a positioning and clamping unit. , an auxiliary support unit and a horizontal sliding unit, the positioning clamping unit and the auxiliary supporting unit are installed on the horizontal sliding unit, the positioning clamping unit is provided with a power source, a positioning clamping module and a supporting clamping module, the power source and the positioning clamp After the clamping module is fixedly connected, use the connecting seat and the guide shaft to connect with the supporting clamping module to realize the clamping and positioning of the tower body. The positioning mechanism of the tower body and the positioning mechanism of the suspension main body are all equipped with angle adjustment structures, so that each mechanism can be positioned at X ‑Y and X‑Z plane angles are adjustable, control the precise positioning of the tower body and the suspension body after assembly, and realize the opening size and shape accuracy of the control arm installation position after welding. The quality is stable and reliable.

Description

[0001] The invention relates to the technical field of jigs, in particular to a positioning jig suitable for welding a MacPherson suspension tower, and belongs to the technical field of welding. Background technique [0002] The McPherson suspension is the most widely used independent suspension for cars at present. It is simple in structure, compact in arrangement, small in front wheel alignment change, and has good driving stability. Among them, the lower wishbone is connected with the main body of the McPherson suspension, and the lower wishbone is connected with the steering knuckle through the ball pin, which constitutes one of the elements for adjusting the four-wheel alignment. Therefore, the installation position between the suspension main body and the lower wishbone is connected Precision control is particularly important, especially in the installation position formed between the tower body and the suspension body. [0003] In production practice, although separate ...

AI Technical Summary

Problems solved by technology

[0003] In production practice, although separate clamping and positioning are used for the tower body and suspension main body, the traditional clamping and positioning mechanism design only considers the adjustment in three directions of the coordinate axis, or the adjustment of an additional angle direction, and does not consider The adjustment of multiple angles and the angle adjustment and synergy of multiple mechanisms result in unsatisfactory positioning between the tower body and the suspension body, resulting in the opening size accuracy and shape accuracy of the installation position formed between the tower body and the suspension body unable to meet requirements

[0004] At the same time, the control accuracy of the installation position formed between the tower body and the suspension body by the manufacturer is only reflected in the opening size and the coaxiality between the installation hole and the nut, without considering the parallelism of the opening and the position of the installation position. factors, resulting in the following problems in the assembly process: (a) Poor coaxiality, during the bolt tightening process, always interferes with the side of the plate hole; (b) Poor parallelism, showing a "bell mouth" phenomenon, the hinge of the lower cross arm There are uneven gaps between the contact surface with the main body of the suspension, and the torque attenuation phenomenon frequently occurs during the bolt tightening process; (c) the position is poor, and after the chassis module is assembled, during the calibration of the four-wheel parameters, limit parameters or Exceeding the limit causes the four-wheel calibration to fail

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