Welding machine for welding pins of thin-film capacitors

The welding machine comprises a protective workbench, supporting bottom feet are arranged at the four corners of the lower end of the protective workbench, a driving dial is installed in the protective workbench, one side of the upper end of the protective workbench is rotationally connected with a grooved wheel rotating disc in a sleeving mode, and the grooved wheel rotating disc is rotationally connected with the driving dial in a sleeving mode; through rotation of a driving dial, a cylindrical pin can drive a grooved wheel turntable to intermittently rotate, and four telescopic clamping plates can intermittently and automatically rotate to a welding processing position, so that a worker can conveniently take a thin-film capacitor; and meanwhile, in the intermittent rotation process of the grooved wheel rotating disc, four contact switches can intermittently make contact with four arc conductive blocks, so that an electric hydraulic rod can intermittently stretch out and draw back, an iron welding mechanism