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Method and device for carrying out differential temperature incremental forming on aviation light alloy plates

A progressive forming and light alloy technology, applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of low forming quality, uneven deformation, low forming precision, etc., achieve high production efficiency, improve deformation uniformity, Effect of improving formability

Active Publication Date: 2016-11-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Light alloy parts with high forming quality and high forming precision are prepared by dynamically adjusting the height of the heat transfer oil at all times, which effectively solves the problems of thermal progressive forming with low overall forming quality, low forming precision and uneven deformation.

Method used

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  • Method and device for carrying out differential temperature incremental forming on aviation light alloy plates

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The first step is to fix the 2017 aluminum alloy plate with a side length of 150mm and a thickness of 1mm to the support base through a pressure plate;

[0023] The second step is to inject heat conduction oil into the heat conduction oil tank until the heat conduction oil contacts the plate;

[0024] The third step is to use the heating resistor in the support base to heat the heat transfer oil to 250°C and keep it warm for a period of time;

[0025] The fourth step is to import the compiled conical trajectory G code into the CNC progressive forming machine tool. After the temperature of the plate reaches 250°C, add lubricating oil at the forming position to perform differential temperature progressive forming on the plate; The liquid level detection and control system measures the height of the heat transfer oil liquid level in real time, and realizes the dynamic adjustment of the liquid level height, so that the unformed part is always in contact with the heat transf...

Embodiment 2

[0028] The first step is to fix the magnesium alloy plate with a side length of 150mm and a thickness of 1mm to the support base through a pressing plate;

[0029] The second step is to inject heat conduction oil into the heat conduction oil tank until the heat conduction oil contacts the plate;

[0030] The third step is to use the heating resistor in the support base to heat the heat transfer oil to 280°C and keep it warm for a period of time;

[0031] The fourth step is to import the compiled G code of the square cone trajectory into the CNC incremental forming machine tool. After the temperature of the sheet reaches 280°C, add lubricating oil at the forming position to perform differential temperature progressive forming on the sheet; during the forming process, through The oil level detection and control system measures the height of the heat transfer oil in real time, and realizes the dynamic adjustment of the liquid level, so that the unformed part is always in contact ...

Embodiment 3

[0034] The first step is to fix the pure titanium plate with a side length of 150mm and a thickness of 1mm to the support base through a pressure plate;

[0035] The second step is to inject heat conduction oil into the heat conduction oil tank until the heat conduction oil contacts the plate;

[0036] The third step is to use the heating resistor in the support base to heat the heat transfer oil to 300°C and keep it warm for a period of time;

[0037] The fourth step is to import the compiled G code of the rotary trajectory whose busbar is a circular arc into the CNC progressive forming machine tool. After the temperature of the plate reaches 300°C, add lubricating oil at the forming position to perform differential temperature progressive forming on the plate; During the process, through the oil level detection and control system, the height of the heat transfer oil liquid level is measured in real time, and the liquid level height is dynamically adjusted, so that the unform...

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Abstract

The invention discloses a method and device for carrying out differential temperature incremental forming on aviation light alloy plates. The method comprises the following specific steps: firstly fixing an aviation light alloy plate on a support base which comprises a heat-conducting oil groove, wherein the heat-conducting oil groove comprises a pipeline, a heating device, a temperature control device and an oil liquid level height detection and control system; injecting heat-conducting oil into the heat-conducting oil groove until the heat-conducting oil is in contact with the plate; heating the heat-conducting oil through the heating device and the temperature control device so as to ensure that the temperature of the plate achieves a required temperature and the temperature is uniform; selecting a proper incremental forming process to carrying out differential temperature incremental forming; and in the forming process, measuring the height of the liquid level of the heat-conducting oil in real time through the oil liquid level height detection and control system, and realizing the dynamic adjustment of the height of the liquid level so as to ensure that the unformed part is in contact with the liquid level of the heat-conducting oil all the time to be in the heating state and the formed part is divorced from the liquid level of the heat-conducting oil to undergo online cooling.

Description

technical field [0001] The invention belongs to the technical field of advanced manufacturing of metal complex sheet metal components, in particular to a method and device for progressive forming of aviation light alloy sheets. Background technique [0002] Incremental forming is a new flexible and rapid prototyping method for sheet metal. Incremental forming has greater flexibility and is easy to realize the integration of design and manufacturing. It does not need molds or only simple support molds. The production cycle is short and the cost is low. It is suitable for many varieties , small batches and sample production before new product development. Incremental forming is based on the idea of ​​"layered manufacturing". The complex three-dimensional mathematical model of the workpiece is discretized into many section layers along the height direction. processing. The progressive forming technology has a large forming limit and high forming quality. It achieves the overa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D31/00B21D37/16
CPCB21D31/00B21D37/16
Inventor 郭训忠王辉谷岩波陶杰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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