Automatic welding device for inner net of filter

The utility model discloses an automatic welding device for an inner net of a filter. The spot welding machine comprises a rack, a clamping tool, a rail, a moving trolley, a motor, a spot welding aircylinder, a spot welding machine body and a control box. A horizontal mounting groove is formed in the upper surface of the rack; the clamping tool is mounted in the mounting groove and clamps a plurality of inner nets which are arranged side by side; the rails are symmetrically mounted on the two sides of the mounting groove; the moving trolley is mounted on the rail; a transverse plate is arranged on the moving trolley; the motor is mounted on the lower surface of the transverse plate; the motor drives the moving trolley to move on the rail; the spot welding cylinder is mounted on the lowersurface of the transverse plate; the spot welding machine is installed at the output end of the spot welding air cylinder and arranged downwards, the control box is connected with the motor, the spotwelding air cylinder and th