A method for forming a tubular member into a formative integration

Abstract

A formability integration method for forming a tubular part firstly selects an initial tube blank, determines the mold clamping position A and position B, heats the initial tube blank to a temperature T, where T is in the range of 300°C-1400°C, the mold is opened, and the The initial tube blank is put into the lower die, the upper die is clamped to position B, both ends of the initial tube blank are sealed, the first valve is opened, and a fluid medium with a pressure of p is filled into the initial tube blank. Partial moulding, some parts with sharp spatial shapes are not completely moulded, adjust the internal pressure of the initial tube blank to p cr , the upper mold moves to the clamping position A to achieve complete mold attachment, open the second valve, use the mold to complete the quenching of the workpiece under the support of internal pressure, close the first valve, release the sealing of the tube blank, and close the second valve, Open the mold and take out the workpiece. The invention realizes the integration of high-strength steel material forming and quenching, produces shape accuracy and heat treatment effect that meet the requirements, and breaks through the manufacturing bottleneck.

Description

technical field [0001] The invention relates to a forming method in the technical field of industrial manufacturing, in particular to a formability integration method for forming a tubular part. Background technique [0002] High-strength steel has a high mass-to-strength ratio and has excellent weight reduction effect. It is limited to plate parts, which reduces the thickness of the plate. The corresponding technology is hot stamping, and another type of component on the body is tubular parts. The preparation and processing methods of high-strength steel tubular parts that have been publicly reported mainly include the following two: one. The first processing method is to form in a soft state, and then quench the process route to improve the strength of high-strength steel tubular parts. This method is quenched outside the mold, which is easy to ensure the heat treatment effect, but the disadvantage is that the quenching deformation cannot be avoided; another method is hot ...

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Problems solved by technology

[0002] High-strength steel has a high weight-to-strength ratio and excellent weight-reducing effect. The advantages of high-strength steel make it rapidly developed and widely used in the automotive industry, so as to achieve the purpose of lightening the car and improving safety. At present, the application of high-strength steel It is limited to plate parts, which reduces the thickness of the plate. The corresponding technology is hot stamping, and another type of component on the car body is tubular parts. The preparation and processing methods of high-strength steel pipe-shaped parts that have been publicly reported mainly include the following two methods: 1. The first processing method is forming in a soft state, and then quenching to improve the strength of the high-strength steel pipe. This method is quenched outside the mold, which is easy to ensure the heat treatment effect, but the disadvantage is that quenching deformation cannot be avoided; another method is hot gas The shortcomings of this method are: a series of problems such as excessive air pressure required, serious wall thickness reduction of high-strength steel pipe-shaped parts, uneven quenching, rupture of pipe-shaped parts, and wrinkling forming defects have not been solved so far. widely used

At present, there is no technology that can solve the problem of efficient production of high-strength steel pipe-like parts

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