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Hot extrusion forming method of special-shaped square tube

A molding method and hot extrusion technology are applied in the field of hot extrusion molding of special-shaped square tubes to achieve the effects of reasonable process design, high efficiency, and strong bending and torsion resistance.

Inactive Publication Date: 2016-03-23
JIANGSU CHANGSHU HUANTONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention is to provide a hot extrusion molding method for special-shaped square pipes, which can solve the shortcomings of existing special-shaped pipes in the forming process and provide guidance for the preparation of special-shaped pipes

Method used

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Effect test

Embodiment 1

[0021] The invention discloses a hot extrusion molding method for a special-shaped square tube. The special-shaped square tube is a square steel pipe with an outer square and an inner circle, the size of which is 65 mm square × φ40 mm, and the length is 3 m. The forming method includes the following steps:

[0022] (1) Material inspection and processing: conduct ultrasonic and magnetic particle flaw detection on the raw steel, then clean the oil stains on all surfaces of the raw steel, rinse with clean water, and then cut to length;

[0023] (2) Centering boring: Fix the raw steel after sawing in step (1), and drill and bore the inner hole centering on its central axis, so that the diameter of the inner hole is 40mm;

[0024] (3) Heat treatment: Place the raw steel after boring in step (2) in a programmed heating furnace for preheating and heat treatment; Raise the temperature to 400°C, and keep it at a constant temperature for 2 hours for preheating, then rapidly raise the te...

Embodiment 2

[0030] The invention discloses a hot extrusion molding method for a special-shaped square tube. The special-shaped square tube is a square steel pipe with an outer square and an inner circle, the size of which is 70 mm square × φ48 mm, and the length is 3 m. The forming method includes the following steps:

[0031] (1) Material inspection and processing: conduct ultrasonic and magnetic particle flaw detection on the raw steel, then clean the oil stains on all surfaces of the raw steel, rinse with clean water, and then cut to length;

[0032] (2) Centering boring: Fix the raw steel after sawing in step (1), and drill and bore the inner hole centering on its central axis, so that the diameter of the inner hole is 40mm;

[0033] (3) Heat treatment: Place the raw steel after boring in step (2) in a programmed heating furnace for preheating and heat treatment; Raise the temperature to 600°C, and keep it at a constant temperature for 1 hour for preheating, then rapidly raise the tem...

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Abstract

The invention discloses a hot extrusion forming method of a special-shaped square tube. The special-shaped square tube is a square steel tube which is square outside and round inside. The forming method of the special-shaped square tube comprises steps as follows: (1), material inspecting and processing; (2), centering boring; (3), heating treatment; (4), molding ; (5), hot extrusion; (6), demolding; (7), post-processing. According to the hot extrusion forming method of the special-shaped square tube, the technological design is reasonable, the mold structure is simple, the operation is convenient and easy, the forming speed is high, the efficiency is high, and the method is applicable to large-scale industrial production and provides a guidance for the preparation of special-shaped tube stocks; furthermore, the prepared special-shaped square tube has a high finished product rate, high bending resistance and torsion resistance and excellent comprehensive property, and the application field of the special-shaped square tube is effectively broadened.

Description

technical field [0001] The invention relates to the technical field of forming special-shaped tubes, in particular to a hot extrusion forming method for special-shaped square tubes. Background technique [0002] Shaped fittings have critical and important applications in the automotive, heavy machinery and aerospace sectors. Existing special steel profiles are generally formed by stamping, but this method has complex processes and slow forming speed, is not suitable for large-scale batch production, and has low efficiency. Contents of the invention [0003] The technical problem mainly solved by the present invention is to provide a hot extrusion molding method for special-shaped square pipes, which can solve the shortcomings of existing special-shaped pipes in the forming process and provide guidance for the preparation of special-shaped pipes. [0004] In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to p...

Claims

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Application Information

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IPC IPC(8): B21C37/15B21C23/08
CPCB21C37/15B21C23/085
Inventor 范建平
Owner JIANGSU CHANGSHU HUANTONG IND
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