Method and equipment for making a spring

摘要

A method for making a variable pitch spring (9), in which a spring wire (1) is bent using bending lugs (5, 6) so as to impart a spiral configuration thereto, a gap is formed between the turns by placing, between the turns being formed, the beveled side of a rotary disc (2) having a rotation synchronized with the spring wire supply, the disc (2) having a beveled profile that varies along the periphery of the disc, and the spring wire is cut (3) at the end of the formation of each spring.

主权项

1. A method for making a variable pitch spring, comprising the steps of:
feeding spring wire feed forward at a spring wire feed speed to a rotary separator disk and to bending fingers, wherein the rotary separator disk has a bevelled edge with a varying profile along a length of the periphery of the rotary separator disk; synchronizing rotation of the rotary separator disk with movement of the wire at the spring wire feed speed; bending the spring wire using the bending fingers so as to impart a spiral configuration to the spring wire; placing the bevelled edge of the rotary separator disk between turns of the spring wire during formation of the turns to form a gap between the turns, wherein as a consequence of i) the varying profile of the bevelled edge, and ii) an instant angular position of the rotary separator disk, the bevelled edge defines a varying gap between the turns of the spring; and cutting the spring wire at an end of forming the spring.