초록 ▼

A method is proposed which serves to produce a valve needle of a needle valve. The basis of the method is the production, from a wire serving as the raw material, of a springlike coil on a carrier body, where the adjacent courses of the coil rest on one another, and this coil applied to the carrier

A method is proposed which serves to produce a valve needle of a needle valve. The basis of the method is the production, from a wire serving as the raw material, of a springlike coil on a carrier body, where the adjacent courses of the coil rest on one another, and this coil applied to the carrier body is provided on its circumference with a predetermined contour by grinding on a grinding machine. After the grinding, the individual courses of the coil, forming the individual valve needles, are separated. The wire serving as the raw material and the valve needles after separation of the courses of the coil can be subjected in a suitable manner to a heat treatment. In a simple and inexpensive manner, the method assures the production of curved valve needles with precise dimensions.

대표청구항 ▼

A method for producing a curved valve needle which comprises: winding a spring-like wire of uniform contour around a mandrel to form a coil of separate side-by-side windings and securing each end of the coil to said mandrel. grinding down said spring-like coil lengthwise of said mandrel such that th

A method for producing a curved valve needle which comprises: winding a spring-like wire of uniform contour around a mandrel to form a coil of separate side-by-side windings and securing each end of the coil to said mandrel. grinding down said spring-like coil lengthwise of said mandrel such that the contour of each winding is similarly ground down along its circumference from a thinnest point in each direction to its normal uniform contour, and cutting each winding at its thinnest ground down point and at a point 180°therefrom to provide two similar curved valve needles.