Resin plate multi-point hot forming uniform temperature controlling and loading method

Abstract

The invention provides a resin plate multi-point hot forming uniform temperature controlling and loading method. The resin plate multi-point hot forming uniform temperature controlling and loading method comprises the following steps that (1) the height of a multi-point base body die is adjusted through multi-point forming CAD / CAE / CAM software, and a target part profile is formed; (2) a resin plate is placed above the multi-point base body die; (3) the resin plate to be formed is heated to the target forming temperature through heaters which are arranged inside a hot-bulging box and on the periphery of the multi-point base body die; (4) a gap between the hot-bulging box and a multi-point base body is filled with compressed air so that a silica membrane can expand and deform, the resin plate and a polyurethane membrane are driven to be slowly attached to the die profile, and formation is achieved; (5) the heaters in the hot-bulging box and on the periphery of the multi-point base body are turned off after formation, gas continues to be injected into the gap between the hot-bulging box and the multi-point base body, and the laminated resin plate is subjected to pressure maintaining treatment; and (6) gas is not injected into the gap between the hot-bulging box and the multi-point base body, and the resin plate is cooled to the room temperature slowly.

Description

technical field [0001] The invention relates to a uniform temperature control and loading method, in particular to a uniform temperature control and loading method for multi-point thermal forming of a three-dimensional resin plate, belonging to the field of mechanical engineering. Background technique [0002] The forming processes of resin-based three-dimensional skin parts mainly include compression molding, thermal diaphragm forming and expansion-compression forming, but all three forming methods require specific equipment and molds to form corresponding parts, resulting in high forming costs for resin-based sheets. Multi-point forming is a new technology for three-dimensional surface forming of metal sheets. Combining multi-point forming and thermal expansion forming can realize flexible, efficient, and low-cost forming of resin sheets. However, the multi-point basic body mold is metal, and the heat dissipation is fast. , resulting in a fast local cooling rate. In additi...

AI Technical Summary

Problems solved by technology

[0002] The forming processes of resin-based three-dimensional skin parts mainly include compression molding, thermal diaphragm forming, and expansion-compression forming, but all three forming methods require specific equipment and molds to form corresponding parts, resulting in high forming costs for resin-based sheets.

Multi-point forming is a new technology for three-dimensional surface forming of metal sheets. Combining multi-point forming and thermal expansion forming can realize flexible, efficient, and low-cost forming of resin sheets. However, the multi-point basic body mold is metal, and the heat dissipation is fast. , resulting in a fast local cooling rate. In addition, there are gaps between adjacent multi-point basic body molds, which can easily lead to stress instability and wrinkling during thermal expansion of the resin sheet, which ultimately affects the forming quality of the resin sheet.

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