Method for drawing and forming parabola revolution body

Abstract

The invention relates to a method for drawing shaped parabola revolving body, belonging to the technical field of the plastic forming of material processing engineering. The method comprises the following steps: (1) a set of mould is designed according to the final shape of revolving body parts; (2) the first drawing: when being drawn, a movable soft punch cushion block is arranged on a mould punch; the inner shape of the movable soft punch cushion block is similar to the shape of the punch; a movable rigidity limit cushion block is arranged below a blank holder with a belt drawbead; (3) the annealing heat treatment, the annealing heat treatment is carried out on the parts after the first drawing is carried out on the parts; (4) the second drawing, the same set of module is used; when in drawing, the movable soft punch cushion block and the movable rigidity limit cushion block are removed. In the invention, the movable soft punch cushion block is added on a drawing mould rigidity punch for enlarging the plastic forming of the materials in the first drawing; only one set of drawing module is used on an ordinary hydraulic press, therefore, the parahola revolving body parts which are usually formed with 3-4 sets of moulds by the common drawing processing are successfully formed by twice drawing.

Description

technical field [0001] The invention belongs to the technical field of material processing engineering plastic forming, and relates to a method for forming a parabolic body of revolution by deep drawing. Background technique [0002] The basic forming process of traditional parabolic rotary parts is basically similar to that of spherical parts. However, when the relative height of the parabolic shape part is large (see figure 1 , h / d2>0.5, h—the height of the part, d2—the diameter of the big end of the part), the taper is large (see figure 1 , d1 / d2≤0.2), and the top fillet radius is small (see figure 1 , R≤d2 / 70, R—top fillet radius), the difficulty of forming will increase accordingly. In order to make the blank close to the punch without wrinkling during the deep drawing process, the bulging component and radial tensile stress in the forming process must be increased. Generally, a drawing die equipped with 1 to 2 ring-shaped drawing beads can be used to increase the b...

AI Technical Summary

Problems solved by technology

[0003] In view of the shortcomings of the existing technology that require multiple sets of molds for multi-pass deep drawing and the limitation of the bearing capacity of the top part of the blank, it solves the need for multiple sets of molds in the deep drawing process of the traditional parabolic rotary body, and the number of deep drawing times , many times of heat treatment, many times of surface painting and paint removal, low forming efficiency, and long manufacturing cycle of parts

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