量具合金测量面的焊接是量具修理中常遇到的问题。我们利用自制的《点接触电焊机》,可很好地解决这一问题。点接触电焊机的原理图如右:用3KVA 可调变压器(0～240 V)使电流逐步加大,两电极1和10之间产生局部升温,使在合金片11与千分尺测杆9间的银焊片迅速溶解,将千分尺与合金片焊接在一起,调节变压器电压回零,焊接即告结束。 Measuring alloy welding surface measurement is often encountered in the repair problems. We use a home-made “point contact welding machine” can be a good solution to this problem. The schematic diagram of the point contact welding machine is shown as the right: the current is gradually increased by a 3KVA adjustable transformer (0-240 V), a local temperature rise occurs between the two electrodes 1 and 10, so that between the alloy sheet 11 and the micrometer rod 9 Silver solder pieces dissolve rapidly, the micrometer and the alloy sheet welding together, adjust the voltage transformer back to zero, the welding is over.