Production process of high-precision USB TYPE-C shell

Abstract

The invention discloses a production process of a high-precision USB TYPE-C shell, which comprises the following steps: carrying out drawing molding by taking a welded thin-wall circular tube as a preparation raw material, and carrying out hollow drawing on the thin-wall circular tube to form a transition elliptical tube; the core rod penetrating into the transition oval pipe to be drawn, and obtaining an oblate pipe; then carrying out multi-pass floating core head wall reduction drawing on the oblate pipe to enable the wall thickness of the oblate pipe to be close to and slightly greater than the standard wall thickness of a finished product, so as to obtain a semi-finished product oblate pipe; the semi-finished flat round pipe being subjected to primary empty drawing, and obtaining a flat round pipe material; and the oblate pipe being subjected to annealing treatment, releasing material stress, then cutting the oblate pipe into a shell base body according to the design size, and obtaining a finished product after the shell base body is subjected to surface treatment. High-precision products can be produced, the defective rate is low, the efficiency is high, and the preparation cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of connector manufacturing, in particular to a production process of a high-precision USB TYPE-C shell. Background technique [0002] The production of USB TYPE-C shells on the market is mainly formed by secondary stretching of stainless steel iron plates. Most of them are produced on high-frequency welded pipe units. By the "round-different" forming method, the strip steel is rolled on the forming machine first. It is made into a round tube shape, and is welded into a round billet tube by high frequency, and then rolled into a special-shaped steel tube of the required shape through a set of rollers with special-shaped passes in a sizing machine. [0003] The shell of this production process is stretched many times, the heat is large, and the hardness of the shell changes greatly. At the same time, the wall thickness of the stretched shell is difficult to control, and the shell thickness is uneven. There is...

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Problems solved by technology

[0003] The shell of this production process is stretched many times, the heat is large, and the hardness of the shell changes greatly. At the same time, the wall thickness of the stretched shell is difficult to control, and the shell thickness is uneven. There is a large difference in the thickness of the ends, generally the front end is thin and the back end is thick; and the rigidity is poor. In the dimension and shape inspection after forming, according to the requirements of high-precision products, the defective rate is extremely high, and the production cost is high. The product is cost-effective. Low

[0004] Therefore, in the preparation of some shells with high precision requirements, the existing methods cannot meet the indicators of size and shape accuracy.

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