SU1547919A1 - Method of drawing hollow articles from male die - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in mechanical engineering, instrument making, etc. The aim of the invention is the expansion of technological capabilities and quality improvement. The sheet stock is laid on the die and acts on its central part before the formation of corrugations on the flange part. The corrugations are smoothed over the annular zones alternately from the center to the periphery and from the periphery to the center, which allows initially to reduce the amount of tensile stresses in the dangerous section, and then to create a flange end support. 2 ill., 1 tab.

Description

The invention relates to the processing of metals by pressure and can be used in mechanical engineering, instrument making and other areas of national economy.

The purpose of the invention is the expansion of technological capabilities and quality improvement.

FIG. 1 shows a stamp for implementing the method; in fig. 2 - blank flange with corrugation.

A stamp for implementing the method comprises a punch 1, a die 2, a set of clamping rings 3, a housing 4, a driving screw 5, a pressure roller 6.

The method is carried out as follows.

Sheet blank 7 is placed on the matrix 2 and the central part of the blank is affected by the punch 1 before the corrugation I forms on its flange part.

The clamping rings 3 are supported on the corrugations. When the screw 5 rotates, the pressure roller 6 moves in the radial direction, presses on the pressure rings 3 and smooths the corrugations initially from the center to the periphery and then from the periphery to the center.

The smoothing of the corrugations from the center to the periphery helps to reduce the tensile stresses in the dangerous section, and when smoothing from the periphery to the center, the end flange of the workpiece is supported.

Example. A cylindrical floor part was manufactured with an inner diameter of d 60 mm from a sheet blank of Do 150 mm and a thickness of 1.2 mm, the material was stainless steel 12X18H10T. Initially, they worked on the central part of the workpiece before the formation of conical corrugations, and the height of the corrugation h did not exceed its width b. Then, the corrugations were smoothed along the annular zones from the center to the periphery and from the periphery to the center. Was removed on a hydraulic press mod. P6334A effort 2.5 MN. For comparison, the parts were pressed in the known manner on the same press. Two batches of parts of 10 pieces each were stretched. in each. The table shows the indicators of stretching.

The method allows the manufacture of deeper hollow parts with good quality.

(ABOUT

(L

SP

J

WITH

with

Coefficient (max)

2.2

2.6

Jov ° d

(KQ)

(K0)

Exhaust Depth (max)

() (hs)

Claims (1)

Invention Formula A method of drawing hollow articles from sheet blanks, including pressing the central part of the blank with a punch into the matrix cavity, simultaneously affecting the flange of the blank, including corrugating and smoothing the corrugations from the periphery to the center, in order to expand the technological capabilities and improve quality The smoothing of the corrugations is carried out cyclically along the annular zones, and on each cycle, alternately before corrugation and smoothing from the periphery to the center, the corrugation and p zglazhivanie from the center to the periphery. FIG. 2