KR960040499A - Manufacturing method of sled screw and rolling die for manufacturing sled screw and sled screw made of rolling die - Google Patents

Abstract

The present invention provides a method of manufacturing a sledscrew (Sledscrew) for guiding a reader for reading a record for sound and imaging equipment in electronics and a sled screw made of a rolling die and a rolling die for producing a sled screw. In more detail, a metal wire is used as a material, and the header is processed to obtain a primary processed product by first machining one end of the material to match the outer diameter of the sled screw, and rolling the primary processed product to obtain a large diameter part and A rolling process of cutting and simultaneously curved each end of the small diameter portion, and obtaining a semi-finished product having a ring groove formed on the large diameter portion and the small diameter portion; and a screw rolling process of forming a pre-screw on the body of the semi-finished product by screw rolling the semi-finished product; Grinding process to make pre-screws into finished screws and cutting the opposite part with a diameter slightly larger than the small diameter part Aims to provide a method of manufacturing sled screws in a cutting process, and a rolling die for producing semi-finished products for manufacturing the sled screws by simultaneously cutting both ends of the primary workpiece and cutting the same. It is to provide a sled screw manufactured with several to several tens of times of productivity than manufacturing.

Description

Manufacturing method of sled screw and rolling die for manufacturing sled screw and sled screw made of rolling die

As this is a public information case, the full text was not included.

(A)-(bar) of FIG. 1 is a manufacturing process diagram of the sled screw showing the process of manufacturing the sled screw of this invention, FIG. 2 (a) (b) is a figure of the sled screw manufactured by this invention. 3 is a front view showing an embodiment of a rolling die for producing a sled screw of the present invention, and FIG. 4A, 4B, 3A, and 3A. , BB, CC cross-sectional views showing a process for producing a sled screw with a rolling die of the present invention.

Claims (3)

A header step of forming one end of the material cut to a predetermined length by a header process to form a large diameter portion; A rolling process of rolling the primary processed product through the header process to form upper and lower ring grooves and a small diameter portion, and cutting the end portions of the opposite portions where the large diameter portion and the small diameter portion are formed, and forming a semi-finished product having a curved surface; A screw rolling process of screw rolling processing the semi-finished product made in the rolling process to obtain a screw processing half product in which a preliminary screw is formed in a body between upper and lower ring grooves; A grinding process of grinding the preliminary screw of the screw processing half product that has undergone the screw rolling process to make a finished screw; And a cutting step of cutting the opposite part having an outer diameter slightly larger than that of the small diameter part of the grinding processing product, which has been subjected to the grinding step, to the same outer diameter as the small diameter part, to manufacture the sled screw. Way. Ring groove forming projections and small-diameter forming projections protrude on the working surface of the rolling die, and the upper and lower cutting edges are divided into the first half and the second half on the upper and lower sides of the machining surface, and the upper and lower cutting edges that form the curved processing area are formed symmetrically. Rolling dies for the manufacture of sled screws made by rolling the header-processed semi-finished product to be able to cut and simultaneously curved both ends of the semi-finished product. A sled screw formed by forming a screw between a large diameter portion and a small diameter portion, wherein the primary workpiece obtained by header processing of one end of a raw material is rolled to curved the ends of the large diameter portion and the small diameter portion. A semi-finished product with a ring groove formed on the neck side is obtained and screw rolled with a screw rolling die to form a preliminary screw in the entire body between the ring grooves, and then the pre screw is ground to have the same outer diameter as that of the large diameter portion. Sled screw made of a rolling die, characterized in that the manufacturing. ※ Note: The disclosure is based on the initial application.