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电热丝烧断或老化后需重新盘制是工厂里经常碰到的事。大功率炉子用的铁铬铝合金直径较粗(φ6～10mm),一般工厂都是事先在车床上把线材密绕成弹簧圈备用。为适应炉子尺寸的不同,盘制前先要把密绕的电阻圈拉伸到一定的长度。一般的施工方法是将量准阻值(或折算成长度)后截取的一段电阻圈一头夹台虎钳上,几人拉另一头到一定长度。这种方法费力而又危险,万一虎钳一端脱开便会将人弹伤。
Fusible wire or aging after the need to re-disk system is often encountered in the factory thing. High-power furnace with iron chrome-aluminum alloy thicker diameter (φ6 ~ 10mm), the general factory are in advance on the lathe wire into a coil close-up spare. In order to adapt to the different size of the furnace, before the disk system should be densely wrapped around the resistance ring stretched to a certain length. The general method of construction is the amount of quasi-resistance (or converted into length) after the interception of a resistance ring clip vise, several people pull the other end to a certain length. This method is laborious and dangerous and can injure humans in the unlikely event that the vise is disengaged.