Follow-up pressure-holding flexible stretch forming machine based on vertical loading

Abstract

The invention relates to a follow-up pressure maintaining type flexible stretch forming machine based on vertical loading. The follow-up pressure maintaining type flexible stretch forming machine is used for plastic machining equipment of plate part three-dimensional curved surface forming. According to the aims of the follow-up pressure maintaining type flexible stretch forming machine, control and operation of the flexible stretch forming machine are simplified, the manufacturing cost is reduced, and intelligent self-adaptive precise control in the plate forming process is achieved; and meanwhile, the stress and strain of formed parts are distributed uniformly, the resilience value is reduced, and the quality of the formed parts is improved. The machine is mainly composed of a rack (1), pre-stretching mechanisms (2), follow-up pressure maintaining mechanisms (3), material clamping mechanisms (4) and a vertical loading mechanism (5). The two ends of the rack (1) are connected with the two horizontal pre-stretching mechanisms (2) and a row of the multiple follow-up pressure maintaining mechanisms (3) and material clamping mechanisms (4) correspondingly. The vertical loading mechanism (5) is arranged at the middle position of the rack (1). One end of each pre-stretching mechanism (2) is hinged to the rack (1), and the other end of each pre-stretching mechanism (2) is hinged to a horizontal movement strip (6). One end of each follow-up pressure maintaining mechanism (3) is hinged to the corresponding horizontal movement strip (6), and the other end of each follow-up pressure maintaining mechanism (3) is connected with the corresponding material clamping mechanism (4) through a semispherical pulling rod.

Description

technical field [0001] The passive stretching type flexible stretching forming device of the present invention relates to a plastic processing equipment for three-dimensional curved surface forming of plate parts, and belongs to the field of mechanical engineering. Background technique [0002] The passive stretching flexible stretching forming device is the main processing equipment for large-scale three-dimensional curved surface parts, and is mainly used in the forming of double-curvature three-dimensional curved surface parts in the fields of aerospace, high-speed railway and special-shaped architectural modeling. The traditional sheet metal stretching and forming device adopts integral clamps. After the clamps hold the sheet, with the cooperation of the drawing die, each part of the sheet is basically stretched synchronously in the longitudinal direction, and the end of the sheet held by the jaws is always kept as Due to the fixed shape, the sheet cannot be actively def...

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Problems solved by technology

However, since the flexible stretch forming device uses six rows of hydraulic cylinders, all of which are actively controlled to expand and contract the hydraulic cylinders, the hydraulic cylinders are all actively controlled, and the number of hydraulic cylinders and control hydraulic valves is very large; there are many electrical components and the control system is complicated. , the operation is complex, difficult to control, and the cost of the flexible stretch forming device is relatively high

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