Plastic sheet material high-pressure hot air progressive forming device and forming method thereof

Abstract

The invention discloses an incremental forming device and method of a plastic board by high-pressure hot air. The incremental forming device is arranged on a numerical-control incremental forming machine tool and comprises an air compressor, a heating system, an air nozzle, an infrared temperature testing instrument and a clamping device, wherein the air compressor is connected with the heating system by a pipeline, and the heating system is connected with the air nozzle by a bending pipe. The device and the method has the advantages that the deformation force is applied by adopting compressed air to replace a metal tool in the prior art, so that the simultaneous contact of the two sides of the plastic board with two tool molds can be avoided, and the distortion and the tearing caused by overlarge local tension load is prevented; since the hot air is adopted for heating the plastic board locally in a point-to-point manner, the plastic board is in a high elastic state, so that the deformation resistance of the plastic board is greatly reduced and the forming performance of the plastic board is improved.

Description

technical field [0001] The invention belongs to the technical field of sheet metal progressive forming processing, and in particular relates to a device and a forming method for processing plastic sheet materials by using high-pressure hot air. Background technique [0002] Due to the characteristics of high specific strength and specific stiffness, good chemical stability and low price, plastics are more and more widely used in the fields of medicine, aviation and automobile manufacturing. However, the processing and forming of plastics must be carried out in a molten state or a high elastic state, and the energy consumption of processing plastic sheets is high, and the investment in equipment and molds is high. Therefore, the traditional production process is not suitable for the development of new products and single-piece, small Mass production of plastic parts. Moreover, the plastics used in the original rapid prototyping technology (RPM) are mainly limited to special ...

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Problems solved by technology

[0005] At present, the progressive forming process of plastic sheet material adopts plastic sheet material at room temperature without external heating, and only relies on the friction between the tool head and the sheet material to increase the temperature of the plastic sheet material, resulting in the temperature of the plastic sheet material being too low during forming , the elongation at break is not high, so its deformation ability cannot be fully exerted

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