Multi-head spot welding machine for back plate of folding chair

The utility model belongs to the technical field, and provides a folding chair backboard multi-head spot welding machine which comprises a machine frame. The transverse positioning block is arranged on the rack and used for limiting the transverse freedom degree of the two sides of the chair back; the longitudinal positioning block is arranged on the rack and is used for limiting the longitudinaldegree of freedom of the chair back; the middle of the connecting rod is hinged to the rack; the welding guns are fixedly connected with one ends of the connecting rods, the number of the welding gunsand the number of the connecting rods are both multiple, a plurality of welding spots need to be welded to the backrest plate and the chair back frame, and when the chair back abuts against the transverse positioning block and the longitudinal positioning block, the welding guns and the welding spots are opposite in a one-to-one mode. Through the technical scheme, the problems of high labor intensity, low efficiency and u