SU963645A1 - Hollow articles production method - Google Patents

Description

(54) METHOD OF MANUFACTURING POLISH PRODUCTS

This invention relates to the field of metal forming, namely sheet metal forming, and it can. to be used in the manufacture of roller bearing cages,

A known method of manufacturing hollow articles, preferably a semi-finished product of tapered bearing separators, in which the blanks are cut into a disk, the cup is pulled out, the seam allowance is removed from the semi-finished product, and a hole is punched in the bottom 1.

The disadvantage of the lime process is the increased consumption of metal associated with the presence of an allowance along the outer contour.

A known method of making hollow articles is advantageous for a semi-finished product of conical bearing separators, in which the cutting of a flat annular billet, folding it along the inner contour and shaping the bottom part of the TSJ product is carried out.

The known method has the same drawback, and it is not possible to achieve a stable product quality.

The aim of the invention is to increase the utilization of the metal and the quality of the product.

This goal is achieved by the fact that a known method for the manufacture of hollow articles, preferably a semi-finished product of tapered bearing separators, in which a flat annular cutting is carried out

10 of the workpiece, flanging it along the internal contour and shaping the drain of the product, simultaneously with the flanging of the internal contour, the outer contour is flanged to obtain a semi-finished semi-finished product with a conical section on the lateral surface, smoothly conjugated with the folding sections, and the resulting semi-finished product is calibrated on the lateral surface at 20 giving the shape of a truncated cone, and shaping the bottom part is carried out by crimping the area adjacent to the smaller base.

Figure 1 shows the flat

25 ring billet under the semi-finished product; figure 2 - the workpiece after flanging on the inner and outer contours; on fig.Z - calibrated semi-finished product; figure 4 - p30 lumber after crimping; Fig. 5 shows the semi-finished product after removing the seam allowance E of the bottom part.

Example. A taper roller bearing 7511 separator was manufactured. The separator was manufactured on a multi-position model press machine.

Furth force 250 ie on a portable position of a press from a steel tape. 2 mm thick and 114 mm wide, a blank was cut in the form of a disk. A hole was punched into the next position. Transfer of grab: from one position to another was carried out using a clamshell press device.

 holes in the workpiece is determined by the condition

d (dc-CJKo 5,

where ss. - diameter of the hole in the bottom

separator; C - allowance for the hole in the bottom

separator;

flanging ratio

rep

holes (selectable in

0,6-0,7), Next, the workpiece was flared along the inner and outer contours at the same time. The metal thinning was no more than 10% of the thickness. The inner flange washers are folded to size, determined by the accepted flanging factor. The outer contour is cut to a size equal to the size of the finished product. Between the sections of the outer 1 and inner 2 flanging I get a conical section 3 of the lateral surface, smoothly mated with flanged sections 1 and 2 (see Fig.2), located at an angle of 45 ° to the longitudinal axis of the workpiece. The length of this site is chosen constructively.

Next, the semi-finished product is calibrated, approaching the size and shape of the cup to the drawing dimensions of the separator. Dale. make up the bottom of the semi-finished product, crimping the area adjacent to

a smaller base on two transitions. After the clearance of the bottom part, the seam allowance is removed around the hole in the bottom part, thus removing the zone of greatest metal thinning, obtained during flanging.

At the subsequent stages, simultaneous cutting of windows, calibration of jumpers, stretching of the separator cup are carried out.

The use of the proposed invention allows to reduce the metal consumption by 20% and the economic effect will be about 50 thousand rubles per separator standard size.

Claims (2)

1.Sprishevsky A.I. Rolling bearings. M., Mashinostroenie, 1969, S: 370-372. 2. USSR author's certificate on application 2893923 / 25-27, cl. B 21 D 22/00, 03.13.80 (prototype). F1 / year / FIG. 2 Phage.Z f1 / g. , fug, 5