METHOD AND APPARATUS OF MAKING SPIRAL SPRINGS

摘要

The present invention relates to a method and an apparatus for manufacturing a spiral spring. The inventive method includes a step of successively feeding a linear material, an end portion thereof being partially bent; a step of full bending the partially bent end portion of the linear material; a step of coiling the linear material being fed in succession by forcibly contacting the lineal material thereby forming uniform pitches of the linear material; and a step of forming a hook of the coiled lineal spring and cutting the coiled linear spring at the same time. In the following step of the cutting, the half bending of the end portion of the linear material, which is successively being fed, is performed. The spiral springs made using the method and the apparatus can have a uniform characteristic and the manufacturing time can be shortened.