Method and apparatus for producing a helical spring
AssigneeChuo Hatsujo Kabushiki Kaisha
InventorKeiji Hasegawa
Life of this patent
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Abstract
The present invention is directed to a method for producing a helical spring which comprises the steps of providing a plurality of parameters for defining a desired configuration of a target helical spring, setting at least bending positions and twisting positions on the basis of the plurality of parameters, and bending and twisting the element wire at the positions set in response to every predetermined feeding amount of the element wire, to produce the target helical spring. The parameters includes number of coils, coil diameter and lead of the target helical spring. At least the bending positions may be adjusted in response to the cycle of alternating diameters between a local maximum diameter and a local minimum diameter of the target helical spring.
Claims20
A method for producing a helical spring by cold working to bend and twist an element wire while feeding the wire, comprising:
- providing a plurality of parameters for defining a desired configuration of a target helical spring, the parameters including at least a radial dimension provided in a radial direction of each coil of the target helical spring;
- setting at least bending positions and twisting positions for each coil of the target helical spring at least on the basis of the radial dimension in accordance with the configuration of the target helical spring;
- and
- bending and twisting the element wire at the positions set in response to every predetermined feeding amount of the element wire, to produce the target helical spring with each coil thereof formed to provide the radial dimension.
A method for producing a helical spring by cold working to bend and twist an element wire while feeding the wire, comprising:
- providing a plurality of parameters for defining a desired configuration of a target helical spring, the parameters including at least a radial dimension provided in a radial direction of each coil of the target helical spring;
- setting at least bending positions and twisting positions for each coil of the target helical spring at least on the basis of the radial dimension in accordance with the configuration of the target helical spring;
- adjusting at least the bending positions in response to the cycle of alternating diameters between a local maximum diameter and a local minimum diameter of the target helical spring;
- and
- bending and twisting the element wire at the positions set and adjusted in response to every predetermined feeding amount of the element wire, to produce the target helical spring with each coil thereof formed to provide the radial dimension.
An apparatus for producing a helical spring by cold working to bend and twist an element wire while feeding the wire, comprising:
- parameter setting means for providing a plurality of parameters for defining a configuration of a target helical spring, the parameters including at least a radial dimension provided in a radial direction of each coil of the target helical spring;
- data converting means for converting the plurality of parameters provided by the parameter setting means into at least bending positions and twisting positions for each coil of the target helical spring at least on the basis of the radial dimension in accordance with the configuration of the target helical spring;
- working conditions setting means for setting at least the bending positions and twisting positions in response to the result converted by the data converting means;
- feeding means for feeding the element wire;
- bending means for bending the element wire fed by the feeding means;
- twisting means for twisting the element wire fed by the feeding means;
- and
- driving means for driving the feeding means, the bending means and the twisting means, the driving means placing the element wire at the positions set in response to every predetermined feeding amount of the element wire, on the basis of the bending positions and twisting positions set by the working conditions setting means, then bending and twisting the element wire to produce the target helical spring with each coil thereof formed to provide the radial dimension.
Dependencies are inferred from the claim text.