Manufacturing process for high-precision cold-drawn tube

A manufacturing process and cold-drawn tube technology, applied in the field of high-precision cold-drawn tube manufacturing process, can solve the problems of lack of detection and removal of unqualified raw materials, waste of processing resources, increase of manufacturing costs, etc., to save processing energy and manpower operations , the overall qualified rate is improved, and the effect of reducing processing costs

CN112157431AInactive Publication Date: 2021-01-01无锡市腾茂液压机械有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-01-01
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a manufacturing process for a high-precision cold-drawn tube. The manufacturing process comprises the following steps of heating, piercing, annealing, first-time pickling, cold-rolling, stress-relief annealing, second-time pickling, phosphating, saponifying, cold-drawing, normalizing and air-cooling, quenching, honing, thermal strengthening and detecting. Related detectingand screening steps are added, so that unqualified products can be timely detected and removed, and therefore, the unqualified products are prevented from being further processed, processing energy and labor operation are saved, and unnecessary investment processing cost is reduced; and in the manufacturing process, rust-removal and cold-drawn tube crystallization refining are added to remove dimples in surfaces, so that an integral qualification rate is increased after the high-precision cold-drawn tube is manufactured.
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Description

technical field

[0001] The invention belongs to the technical field of cold-drawn tube manufacturing process, and in particular relates to a high-precision cold-drawn tube manufacturing process. Background technique

[0002] Precision cold-drawn pipe is a high-precision steel pipe material that uses cold-drawn seamless pipe as raw material for tolerance control and surface bright processing. Precision cold-drawn pipe has high precision, high finish, good inner wall cleanliness, and the steel pipe can withstand high pressure. No leakage, no deformation in cold bending, flaring, flattening without cracks, etc., and can be processed by various complex deformations and mechanical processing.

[0003] At present, most high-precision cold-drawn tubes are directly processed in batches, and there is a lack of steps to detect and remove unqualified raw materials in the relevant processing flow, so there will be a high defect rate after processing, and further processing of unqualifie...

Examples

Embodiment Construction

[0023] Technical scheme of the present invention is further described:

[0024] A manufacturing process of high-precision cold-drawn tubes, including heating, piercing, annealing, first pickling, cold rolling, stress relief annealing, second pickling treatment, phosphating treatment, saponification treatment, cold drawing, normalizing Air cooling treatment, quenching treatment, honing, heat straightening treatment, testing, including the following steps:

[0025] (1) Heating: heat the tube blank in the ring furnace evenly;

[0026] (2) Perforation: the heat pipe blank is perforated by a perforator to obtain a steel pipe prototype;

[0027] (3) Annealing: introducing the perforated tube blank into a continuous annealing furnace for annealing to obtain an annealed tube blank;

[0028] (4) Pickling for the first pass, after annealing, the tube blank is pickled with an acidic liquid and judged by observing whether there are a large number of bubbles on the surface of the tube bl...