Fusion welding machines is a kind of special welding equipment that uses hot melt butt welding technology to weld thermoplastic pipe fittings. The welding frame of the hot melt butt welding machine is separated from the operating system. The whole machine (automatic type, hydraulic semi-automatic type) consists of hydraulic operation console, welding frame and fixture, electric heating plate, electric milling cutter and other parts. Manual type no hydraulic system. The welding frame adopts high-strength aluminum alloy material, which has a firm structure, light weight and durability. The welding frame adopts the compression structure of the card mica sheet to accurately position the pipe and make it easy to adjust the misalignment amount.