Plate stretch-forming machine

A drawing machine and plate technology, which is applied in the field of mechanical engineering, can solve the problems of uneven distribution of tensile stress and tensile strain of parts, reduced material utilization, and expensive manufacturing costs, so as to improve material utilization, reduce manufacturing costs, and reduce load. Path reasonable effect

CN101596563BActive Publication Date: 2010-12-22JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2010-12-22

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Abstract

A plate stretch-forming machine of the invention relates to plastic processing equipments used for 3-D curved surface forming of plates and belongs to the mechanical engineering field. The machine aims at facilitating tensile stress and tensile strain distribution of stretch-forming parts to be even, realizing stretch-forming of curved parts with big curvature, improving stretch-forming quality and material utilization ratio and reducing manufacturing cost of stretch-forming devices. The machine mainly comprises a rack (1), a row of multiple material-pulling mechanisms and a row of multiple material-chucking mechanisms (3), which are arranged at the left and right sides of the rack (1) respectively; the material-pulling mechanism is formed by mutual hinge joint of three hydraulic cylinders (2), wherein, one of the three hydraulic cylinders (2) is horizontally arranged, one vertically arranged and one obliquely arranged; the material-chucking mechanism is mainly composed of a support (10), a material-chucking plate (11) and a small-stroke single-acting hydraulic cylinder (12).
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Description

Technical field:

[0001] Plate drawing machine is a plastic processing equipment used for three-dimensional curved surface forming of plate parts, which belongs to the field of mechanical engineering. Background technique:

[0002] Stretching machine is a device for stretching and deforming plates, and is mainly used in the forming of double curvature skin parts in the aerospace field. Traditional stretching machines are generally divided into horizontal stretching machines and longitudinal stretching machines. During stretching, tensile stress and tensile strain are generated on the inner and outer layers of the sheet along the stretching direction, thereby reducing the amount of springback of the workpiece. After the clamps of the traditional drawing machine clamp the sheet, with the cooperation of the drawing die, each part of the sheet is basically stretched along the longitudinal direction synchronously. When forming a double-curvature skin part, the distribution of ten...

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Embodiment Construction

[0042] The specific content and working process of the present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0043] Fig. 1 is a schematic diagram of a drawing machine, which is mainly composed of a frame 1 and a row of five pulling mechanisms and clamping mechanisms 3 on the left and right sides of the frame 1. The material pulling mechanism is made up of three hydraulic cylinders 2, one is arranged horizontally, one is arranged vertically, and the other is arranged obliquely. One end of the hydraulic cylinder 2 is respectively hinged with the frame 1, and the other end is jointly hinged with the clamping mechanism 3. By changing the hydraulic pressure of the hydraulic cylinder 2, the stroke of the hydraulic cylinder 2 can be changed, and the angle between the hydraulic cylinders 2 can also be changed, thereby changing the position and the pulling direction of the clamping mechanism 3. The hydraulic pressur...