| 摘要 |
PURPOSE:To restore efficiently and beautifully a recessed part of a sheet metal by providing a means for making an electromagnet formed by inserting a ferromagnetic mandrel into a ferromagnetic outer cylinder contact by pressing to the recessed part of the sheet metal, and drawing the electromagnet to its base end side. CONSTITUTION:A coil 3 formed by winding an electric wire to a mandrel 2 of a round iron rod is fitted into an iron pipe outer cylinder 5, and the mandrel 2 is inserted into an axial core position of the outer cylinder 5, by which an electromagnet 1 is formed. Attracting plates 11, 12 are fixed to the tip of the mandrel 2. By an electric conduction to the coil 3, the attracting plates 11, 12 of the tip of the electromagnet 1 become magnetic poles, and are attracted to the recessed part surface of a sheet metal of a car body, etc. A hook 22 of a drawing tool of a thrust hammer 16, etc. is engaged with a ring 10 formed on the base end of the electromagnet 1. A hammer 17 of the thrust hammer 16 is made to execute a reciprocating motion and to collide against a large diameter part 20 of a main shaft 19, and by its colliding force, the recessed part surface of the car body attracted to the tip of the electromagnet 1 is drawn by drawing the electromagnet 1 to the base end side and restored to its original position. |
