Dual-mode drawing die structure

Abstract

The invention discloses a bimold drawing mold structure which comprises a front mold and a rear mold, wherein at least one guide wheel is arranged between the front mold and the rear mold; the guide wheel ensures that distribution of steel wires between the two molds changes, and the steels wires are not distributed on a straight line; on one hand, due to the existence of the guide wheel, the front and rear steel wires of each mold and the calibration bench of the mold are on a same straight line, so that the straightness of the steel wires during drawing can be ensured, i.e., the two molds are not required to have concentricity, so that the precision requirement for the two molds in use can be reduced; on the other hand, due to the existence of the guide wheel, the front mold and the rear mold preserve respective independence, when one mold is rotated so as to regulate the ring diameter of the steel wire, the ring diameter of the steel wires drawn by the other mold is not influenced, so that the ring diameter and pitch of the drawn steel wires can be regulated conveniently.

Description

technical field [0001] The invention relates to a wire drawing die involving metal materials such as steel wire, cutting steel wire, cord steel wire, rubber hose steel wire and the like. Background technique [0002] Double-mode drawing means that two molds are used for drawing in one drawing pass, and the steel wire has drawing plastic deformation when passing through the two molds. Double-mode drawing uses the principle of reverse pull to change the drawing force required when the steel wire passes through one die into the reverse pull force when the steel wire passes through the other die, thereby changing the deformation conditions of the steel wire and improving the service life of the die; double-mode drawing can Distribute the larger steel wire compression rate in one pass on two molds, so that the compression rate of each mold is smaller, which is beneficial to improve the performance of steel wire when used in the process pass; double-die drawing is used in the fini...

AI Technical Summary

Problems solved by technology

The currently used dual-mode, on the one hand, requires high machining accuracy of the mold core, mold sleeve, and mold base to ensure that the two molds of the dual-mode have precise concentricity. The core, the steel wire between the two molds, the mold core of the rear mold, and the steel wire after the rear mold are drawn are on the same straight line to ensure the quality of the drawn steel wire, otherwise the drawn steel wire will easily appear in double-die drawing. Uneven deformation, shrinkage, flat wire, scratches, broken wires, etc., which is a relatively high threshold for mold and equipment processing; Adjustment and control, this is because the steel wire drawing ring diameter and warp distance are mainly determined by the angle between the rear die and the wire outlet direction. For double die drawing, adjusting the angle of the rear die will cause the steel wire between the two dies to The change of the angle of the mold makes the diameter of the traveler and the warping distance between the two molds change, and also affects the concentricity of the two molds; and the two molds rotate synchronously, which is equivalent to adjusting the angle of the front mold. The influence of changes in diameter and pitch becomes more complicated

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