The mechanical noise of automatic welding is caused by the vibration or mutual impact of various mechanical components excited by external force. The main methods of controlling mechanical noise are:

提高旋轉運動部件的平衡精度，減少旋轉運動部件的周期性激發力；在固體零部件接觸面上，增加特性阻抗不同的彈性材料，減少固體傳聲；在振動較大的零部件上安裝減振器，以隔離振動，減少噪聲傳遞；采用內損耗系數較高的材料制作機械設備中噪聲較大的零部件，或在振動部件的表面附加阻尼，降低其聲輻射效率；

Improve the balance accuracy of rotating parts and reduce the periodic excitation force of rotating parts; On the contact surface of solid parts, elastic materials with different characteristic impedance are added to reduce solid sound transmission; Install shock absorber on parts with large vibration to isolate vibration and reduce noise transmission; Use materials with high internal loss coefficient to make noisy parts in mechanical equipment, or add damping on the surface of vibrating parts to reduce their sound radiation efficiency;

提高運動部件的加工精度和光潔度，選擇合適的工差配合，控制運動部件之間的間隙大小，降低運動部件的振動振幅，采取足夠的潤滑減少摩擦力；避免運動部件的沖擊和碰撞，降低撞擊部件之間的撞擊力和速度，延長撞擊部件之間的撞擊時間；用焊接代替鉚接，用滾壓機和風壓機矯正鋼板代替敲打，用無聲液壓或擠壓代替沖壓，可用壓力機代替鍛錘。

Improve the machining accuracy and finish of moving parts, select appropriate work difference cooperation, control the gap between moving parts, reduce the vibration amplitude of moving parts, and take sufficient lubrication to reduce friction; Avoid the impact and collision of moving parts, reduce the impact force and speed between impact parts, and prolong the impact time between impact parts; Welding is used instead of riveting, rolling machine and air compressor are used to correct the steel plate instead of knocking, silent hydraulic or extrusion is used instead of stamping, and press can be used instead of forging hammer.

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