Several-time drawing formation device for deep-cylinder-shaped piece

Abstract

Disclosed is a several-time drawing formation device for a deep-cylinder-shaped piece. The several-time drawing formation device for the deep-cylinder-shaped piece comprises an upper die base and a lower die base. The upper die base and the lower die base are connected with guide pillars through ball bearing guide bushings, a protrusion locating piece is fixedly installed on the upper die base, nitrogen cylinders are arranged on the lower end of the protrusion locating piece, piston rods of the nitrogen cylinders and blank holders tightly press blank materials through a groove at the lower end of a rubber block, a protrusion main body is installed on the protrusion locating piece and is composed of a protrusion die, a polyurethane elastomer, a locating ring, a pressing plate and a protrusion die connecting piece, a cone-shaped concave mould is fixed on the lower die base, and an ejector rod ejects out a workpiece after several-time drawing are finished. Due to the fact that a nitrogen cylinder flange pressing device and the polyurethane elastomer are both used on the several-time drawing formation device for the deep-cylinder-shaped piece, efficiency and quality of drawing formation can be ensured.

Description

technical field [0001] The invention belongs to the technical field of material forming, and in particular relates to a multi-drawing forming device for deep cylindrical parts. Background technique [0002] Deep cylindrical products are widely used in all walks of life, military fields such as missile casings, torpedo casings, aircraft auxiliary fuel tanks, etc.; civilian fields such as automobile airbags, high-end water cups, etc.; chemical fertilizer tanks, gas storage tanks, high-pressure containers, etc. in the chemical industry. In the sheet metal forming process, the deep drawing process has become the main method for forming cylindrical parts due to its high efficiency and good quality. However, because many plates are constrained by the formability and technology itself, deep cylindrical parts with a larger height-to-diameter ratio (generally, the height-to-diameter ratio is greater than 3), and complex parts with higher forming limits cannot be realized when only re...

AI Technical Summary

Problems solved by technology

However, because many plates are constrained by the formability and technology itself, deep cylindrical parts with a larger height-to-diameter ratio (generally, the height-to-diameter ratio is greater than 3), and complex parts with higher forming limits cannot be realized when only relying on traditional deep drawing processes. forming, or high scrap rate of formed parts

The main defect in the forming of deep cylindrical parts is cracking at the bottom. How to make full use of the forming performance of the material and improve the forming quality is an urgent problem to be solved.

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