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Electrical heating numerical control incremental forming processing method and device for plate

A technology of incremental forming and processing methods, applied in the direction of digital control, electrical program control, etc., can solve problems such as incremental forming, and achieve the effect of increasing the forming angle range, reducing processing force, and overcoming the influence

Inactive Publication Date: 2008-12-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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Problems solved by technology

No one has discussed which heating method is more conducive to the processing of incremental forming

Method used

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  • Electrical heating numerical control incremental forming processing method and device for plate
  • Electrical heating numerical control incremental forming processing method and device for plate

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Embodiment Construction

[0024] attached figure 1 And attached figure 2 They are schematic diagrams of sheet metal local self-resistance electric heating CNC progressive positive forming and negative forming. The device consists of a three-axis CNC progressive forming machine tool and an electric auxiliary heating device. The CNC incremental forming machine tool spindle clamps the indenter and moves along the processing track on the contour level, so that the sheet metal is deformed successively along the envelope surface of the forming indenter track, and finally the sheet is formed into the required workpiece. The electric auxiliary heating device is mainly composed of a low-voltage high-current adjustable DC power supply, an indenter handle, an indenter, a mold and a large current-carrying wire. The circuit is reliably insulated from the machine tool by using insulating gaskets and insulating sleeves.

[0025] the following to figure 1 As an example, incremental forming is described as positive...

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Abstract

The invention relates to a device and a method of the electrical heating numerical control incremental forming processing of a sheet metal and belongs to the technical field of the sheet metal incremental forming processing. The key points of the device and the method lie in that a large current-carrying wire is used for forming an auxiliary power supply, a forming pressure head, a forming clamp and the sheet metal into a current loop; the power supply provides a low-voltage large current to cause the materials in a processing area to generate joule heat and to be softened in the sheet metal processing and forming so as to ensure the smooth implementation of the incremental forming processing. The heating method is fast in temperature rising, convenient in control and low in price, thus solving the problem that other heating methods are complex to control, improving the processing precision and being favorable for forming complex parts. At the same time, the method is suitable for the incremental processing of sheet metals such as the titanium magnesium sheet metal, and the like, which are hard to be plastically formed at normal temperature.

Description

technical field [0001] The electric heating numerical control incremental forming processing method and device of the sheet metal of the present invention belong to the technical field of sheet metal incremental forming processing. Background technique [0002] Sheet metal forming is widely used in aviation, shipbuilding, automobile and other manufacturing industries. However, the traditional sheet metal forming process uses molds, which has the problems of long cycle time and high cost, and it is difficult to meet the needs of small batches, multiple varieties and sample trial production. In the past 10 years, due to the diversification of market demand and the advancement of machinery and control technology, there has been a new development in dieless forming of sheet metal. Many scholars at home and abroad, especially researchers in Germany and Japan, have conducted a lot of research. In the early 1990s, Japanese scholar Matsubara Shigeo proposed a new sheet metal forming...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D11/20B21D11/22G05B19/18
Inventor 高霖范国强张青来
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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