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过去,美国汽车公司在进行车身焊接时,一直使用带有沉重软管的大型焊枪,劳动强度大。为了减轻繁重的体力消耗,该公司在焊接线上装用了组合式气动提升和平衡装置,全部焊枪均悬吊在这种装置上。这种空气平衡器与普通弹簧平衡器比较,具有操作轻便、灵活的特点。其升浮作用使焊枪处于无重状态,实际上可使操作者毫不费力地移动焊枪进行焊接或使焊枪回位。空气平衡器的优点之一是它的平衡范围大。一台空气平衡器就能平衡从0～68公斤范围内的任何重量;而弹簧平衡器的能力一般限制在6.8公斤左右,而要适应68公斤这一平衡范围,就得有好几台弹簧平衡器。
In the past, American auto companies have been using large guns with heavy hoses for heavy-duty welding during bodywork. In order to reduce the heavy physical exertion, the company installed a combination of pneumatic lifting and balancing device on the welding line, all the guns were suspended in this device. This air balancer with ordinary spring balancer, with the operation of light, flexible features. Its lifting effect keeps the torch at zero weight, virtually enabling the operator to effortlessly move the torch for welding or return the torch. One of the advantages of an air balancer is its wide range of balance. An air balancer can balance any weight from 0 to 68 kg; while the spring balancer capacity is generally limited to about 6.8 kg, and to adapt to the range of 68 kg balance, you have to have several spring balancer .