Friction pressure loading unit of linear friction welding machine and loading method thereof

A friction pressure, linear friction technology, applied in fluid pressure actuation devices, mechanical equipment, welding equipment, etc., can solve the problems of large driving force, unfavorable energy saving and consumption reduction, and achieve the effect of reducing driving force

Inactive Publication Date: 2007-07-11
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] The friction pressure loading mechanism of the linear friction welding machine requi

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  • Friction pressure loading unit of linear friction welding machine and loading method thereof

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Embodiment Construction

[0014] In order to reduce the vibration driving force, the present invention proposes a friction force pulsating loading method, so that the friction pressure P changes periodically during the linear friction welding process: when the workpiece 1 at the vibration end moves to the neutral position, the inertial force is the smallest, and the friction The pressure is the largest; when the vibration end workpiece 1 moves to the two limit positions, the inertial force is the largest, and the frictional pressure is the smallest at this time. The frictional pressure P has the same frequency of change as the inertial force, but the phase is different by π / 2. The superposition of the maximum inertia force and the maximum friction force is avoided, thus reducing the maximum driving force required for vibration. Therefore, when the required vibration frequency and amplitude are the same, the power required by the vibration system is reduced; when the system drive system power is the sam...

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Abstract

The invention relates to a friction pressure loader of linear friction welding machine, wherein it uses computer to output one group of one-way vibration signals with same frequency, amplitude as vibrant sine signal, but pi/2 phase shift; uses DA output plate to convert it into analogue signal; uses amplifier to V/I convert and amplify; controls servo valve to cylinder piston horizontally move repeated to generate pulp. The invention also discloses a relative loading method, which comprises that: using sine signal to control the vibration servo valve; using one-way vibration signal to control the moving servo valve, to generate friction pressure between work-piece and moving work piece into pulp; therefore, it can reduce driving force.

Description

technical field [0001] The invention relates to a friction pressure loading device of a linear friction welding machine, and also relates to a loading method of the friction pressure loading device of a linear friction welding machine. Background technique [0002] The document "Vibration Model and Dynamic Analysis of Linear Friction Welding Machine "Aviation Manufacturing Technology" Wang Qing, Du Suigeng, Issue 8, 2002, pages 33-36", analyzed the driving force F and The relationship between friction pressure P. It is pointed out that when the friction pressure P is constant, the driving force F of the sinusoidal reciprocating motion of the vibrating end is the resultant force of overcoming the force of the inertial motion of the moving part and the frictional force. The sum of force and friction. [0003] Referring to Figure 2, linear friction welding machines are widely used in the welding industry. The known friction pressure loading mechanism of linear friction weldi...

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Application Information

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IPC IPC(8): B23K20/12B29C65/06F15B13/02G05B19/46
Inventor 杜随更张定华傅莉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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