Preparation method of cold stamping die for steel hub

Abstract

The invention discloses a preparation method of a cold stamping die for a steel hub. The preparation method comprises the following steps: performing mixed smelting on a die material used for production of the cold stamping die at a high temperature, and performing casting to obtain a casting with the required dimension used for production of the die; processing the casting in strict accordance with the drawing to obtain the cold stamping die for the hub; placing mixed salt in an inner heating crucible, heating at a high temperature for melting, and performing heat preservation to obtain a melting liquid; utilizing a cleaning solution to clean the surface of the cold stamping die for the hub thoroughly, and performing high temperature preheating to obtain the preheating die; and placing the preheating die in the heat preservation melting liquid for soaking, performing quenching and tempering treatment in sequence after soaking, and finally naturally cooling to room temperature to obtain the cold stamping die for the steel hub. Compared with the prior art, the preparation method of the cold stamping die for the steel hub has the benefits as follows: the raw material cost is low, the processing and manufacturing cost is low, and the prepared cold stamping die has the advantages that the impact toughness is high and the service life is long; besides, the prepared cold stamping die for the steel hub prepared by adopting the preparation method can be used for production of steel hubs, and further has the advantages of being high in production efficiency, high in the qualified rate of finished products and worth to be popularized.

Description

technical field [0001] The invention relates to the technical field of mold preparation, in particular to a method for preparing a steel hub cold stamping mold. Background technique [0002] The wheel hub is an important running part of the car. The driving process of the car will generate lateral and longitudinal loads. At the same time, with the driving torque and braking torque, the wheel hub needs to bear a considerable part of the load. With the rapid development of the automobile industry, the requirements for the stiffness and strength of the wheel hub are also getting higher and higher. Steel wheels are widely used in trucks due to their great advantages over aluminum alloy wheels in terms of cost and safety. In the prior art, a common production method for steel wheels is to press alloy steel plates through cold stamping dies under pressure, and the service life of cold stamping dies is an important factor affecting the mass production of steel wheels. Most of the...

AI Technical Summary

Problems solved by technology

Most of the existing cold stamping dies use Cr12MoV die steel as the raw material, the price of raw materials and processing and manufacturing costs are relatively high, and due to the limitations of the processing technology, the obtained cold stamping dies have a large deformation when subjected to huge pressure, and the produced steel The dimensional accuracy of the wheel hub is not up to standard, the product qualification rate is low, and the service life of the cold stamping die is limited