Machining technology for inner race housing die abnormal-shaped punch

Abstract

The invention provides a machining technology for an inner race housing die abnormal-shaped punch, which comprises the following specific steps of: sawing materials, roughly turning, milling into an abnormal shape by a machining center, carrying out heat treatment, finely turning, finely turning in a numerical-control mode, carrying out plane abrasion and electric spark, and grinding. The purposes of saving die materials and improving the die service life and the product quality are realized. In the plane abrasion technology, a plane abrasion fixture is designed to take the head plane of the punch which is finely turned in a numerical-control mode as a reference plane abrasion punch bottom so as to ensure that the depth of parallelism between the upper plane and the bottom plane of the punch is within 0.02mm. The plane abrasion working procedure guarantees the depth of parallelism between the upper plane and the bottom plane of the punch, so that the punch is evenly stressed and has small possibility of breaking, the punch service life is prolonged, and the product quality is improved.

Description

technical field [0001] The invention relates to the field of die processing, in particular to the processing technology of the special-shaped punch of the star sleeve die. Background technique [0002] At present, the common processing technology of star-shaped sleeve special-shaped punches is: sawing → rough turning (both ends are reserved for the process) → horizontal milling of special shapes → heat treatment → grinding the outer circle → fine turning (removing the bottom surface process, turning taper) → EDM →CNC finishing turning (head)→Grinding. The disadvantages of this process are: the mold material is wasted due to the process of building at both ends; the parallelism between the upper plane and the bottom plane of the punch cannot be guaranteed in the whole process, and the force of the special-shaped punch is relatively large during the star-shaped sleeve closed cold forging forming process. If the parallelism cannot be guaranteed, the partial load of the punch w...

AI Technical Summary

Problems solved by technology

The disadvantages of this process are: the mold material is wasted due to the process of building at both ends; the parallelism between the upper plane and the bottom plane of the punch cannot be guaranteed in the whole process, and the force of the special-shaped punch is relatively large during the star-shaped sleeve closed cold forging forming process. Parallelism cannot be guaranteed, resulting in uneven local force on the punch, causing the punch to break and reducing the service life of the punch. The punch processed by this process is not good in parallelism, and the quality of the produced product is not high.

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