System for adjusting load characteristics of conical spring

Abstract

A load characteristic adjustment system for use with a linear-spring forming apparatus is provided, in which the load characteristic of a conic spring can be conveniently and efficiently regulated during the formation of the spring, thereby reliving much of a physical burden of a worker to find an optimum load characteristic of a coil spring. The load characteristics adjustment system comprises: a linear material feeder for feeding a linear material; at least one spring forming tool facing the linear material feeder, adapted to abut against the linear material to coil the linear material; spiraling means for spiraling the coiled linear material; and coil-diameter varying means for varying the diameter of the coiled linear material. The load characteristic adjustment system controls the linear material feeder so as to feed the linear material at a regulated constant acceleration to adjust the load characteristic of the conical spring formed.

1 . A load characteristic adjustment system for use with a spring forming apparatus that includes: a linear material feeder for feeding therefrom a linear material in the axial direction of the linear material; at least one spring forming tool arranged to face the linear material feeder and adapted to be abutted against the linear material to coil the linear material; spiraling means for configuring the coiled linear material into a spiral form; and coil diameter varying means for gradually changing the diameter of the coiled linear material by dynamically changing the distance between the spring forming tool and the linear material feeder in operation, the load characteristic regulating system is characterized in that the system is adapted to cause the linear material feeder to feed the linear material at a regulated constant acceleration to adjust the load characteristic of the conical spring formed. 
     
     
         2 . The load characteristic adjustment system for use with a conical spring forming apparatus that includes: a linear material feeder for feeding therefrom a linear material in the axial direction of the linear material; at least one spring forming tool, arranged to face the linear material feeder and adapted to be abutted against the linear material to spiral the linear material; a pitch tool serving as a spiraling means for spiraling the linear material; and coil diameter varying means for gradually varying the coil diameter of the linear material by dynamically varying the distance between the spring forming tool and the linear material feeder in operation, the load characteristic regulating system is characterized in that the system is adapted to cause said means for gradually varying the coil diameter of the linear material to move, at a regulated constant acceleration, at least one of the linear material feeder feeding the linear material and the spring forming tool to adjust the load characteristic of the conical spring formed. 
     
     
         3 . The load characteristic adjustment system defined in  claim 3  is adapted for use with a conical spring forming apparatus that includes; a linear material feeder for feeding therefrom a linear material in the axial direction of the linear material; at least one spring forming tool, arranged to face the linear material feeder and adapted to be abutted against the linear material to spiral the linear material; a pitch tool serving as a spiraling means for spiraling the linear material; and coil diameter varying means for gradually varying the diameter of the spiraled linear material by dynamically changing the distance between the spring forming tool and the linear material feeder in operation, the load characteristic regulating system is characterized in that:
 the system is adapted to force and move the linear material in the coil forming direction so as to spiral the linear material at a pitch in accord with the displacement of the spiraling means; and 
 the system is adapted to move the pitch tool at a regulated constant acceleration to gradually varies the spiral pitch, thereby regulating the load characteristic of the conical spring formed.