送丝机是气体保护焊机的重要组成部分,是保证气体保护焊接正常运行的关键环节。随着气体保护焊的推广和发展,许多新型、先进的焊机相继产生。为了适应焊机的新特点,不同类型的送丝机也相应出现。目前,国内使用和研制的送丝机有定轴辊轮式送丝机、三钢球送丝机、三滚轮送丝机、双曲线行星滚轮送丝机等。无论运用何种原理设计制造的送丝机,它都应 Wire feeder is an important part of gas shielded welding, gas shielded welding is to ensure the normal operation of the key links. With the promotion and development of gas shielded welding, many new and advanced welding machines have been produced. In order to adapt to the new features of welding machine, different types of wire feeder also appear accordingly. At present, the wire feeder used and developed in China is a fixed-shaft roller wire feeder, a three-ball wire feeder, a three-roller wire feeder, a hyperbolic planetary roller wire feeder and the like. No matter what principle design and manufacture of wire feeder, it should be