Phase control method for friction welding pieces

Abstract

The invention discloses a method for controlling the phase of a friction welding piece. A computer (1) processes the obtained information, issues an instruction at a determined phase, activates a pin pulling mechanism (8), and pulls out a limiting double-layer spring clamp (10). The relatively rotating positioning pin (9) restores the freedom of rotation of the welding piece moving end (15), so that the welding piece rotating end (14) and the welding piece moving end (15) no longer rotate relative to each other, but jointly follow the main shaft (16 ) to complete the final rotation together, so as to realize the phase control of the weldment. Since the "homeopathic" control is used to achieve accurate phase positioning when braking, it can effectively avoid impact or forced torsion, protect the friction welding machine, reduce noise, improve welding quality and efficiency, and reduce costs.

Description

Technical field: [0001] The invention relates to a phase control method of a friction welding piece. Background technique: [0002] The existing friction welding phase control is based on the precise control of the braking point of the rotating end, and two specific methods are derived: electronic mechanical forced positioning and electronic DC braking positioning. [0003] For the electromechanical forced positioning method, see the description of the British invention patent "Continuous drive friction welding machine" whose patent number is GB2084499A. After the computer detects that the rotation speed of the main shaft has dropped to a fixed value, the computer issues an instruction to start the phase positioning mechanism to lower the positioning block, and clamp the cam on the rotating main shaft, so that the main shaft is forced to stop rotating at the limited phase. Its advantage is high positioning accuracy, and its disadvantage is that there is a large impact, whic...

AI Technical Summary

Problems solved by technology

This method has no impact, but because in the final stage of braking, the spindle speed is small and the torque is large, the torque generated by the frequency converter is already difficult to produce effect, making the phase control accuracy of actual welding low

In addition, the forced torsion in the low temperature stage is also likely to affect the welding quality of the joint

[0005] The above two methods of phase control of friction welded parts both use the forced positioning of the rotating end, not only the phase control accuracy is low, but the impact or forced torsion on the friction welding machine and welded parts is relatively large, and there is also a large impact noise. Affects the welding quality of the joint

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