SU1738446A1 - Method of making ring-type workpieces - Google Patents

Abstract

Use: receiving products like rims with a rim and a disk. The blank is formed and stitched with the design of the disc and rim. In the process of pre-forming the disk, the side part of the blank is bent in the direction of a smaller diameter of the outer conical surface of the rim by an angle equal to the angle of inclination of this surface. During the final formation of the product, an intense flow of metal in the transition zone from the bottom of the cavity of the die punch with high-quality design of the product surface is provided, 5 sludge.

Description

The invention relates to the processing of metals by pressure, in particular to the field of hot stamping, and is intended for use in ring-rolling production.

The aim of the invention is to save metal by increasing the dimensional accuracy and the configuration of the rim of the product. The problem to be solved by the proposed method is to fill the gauge of the peripheral zone of the workpiece with metal in the process of forming the rim and to accurately carry out the required configuration and dimensions of the rim of the product

In figure 1, 2, 3, 4 and 5 shows the deformation scheme of the blanks in the manufacture of the crowns of the proposed method:

figure 1 - the original billet;

figure 2-billet after precipitation and distillation;

fig.Z - billet after firmware;

4 is a pre-molding of the workpiece according to the proposed method;

5 shows the final molding of the proposed method.

FIG. The principle is:

1- initial blank;

2- sedimentary plates;

3 punch;

4- billet after sedimentation and distillation;

5- piercing;

6- workpiece after flashing;

7- preform after preforming;

8 - top forming stamp;

9- bottom molding stamp;

10- part of the work piece;

11- outer conic rim surface;

12- the inner surface of the upper stamp;

13- the inner surface of the lower stamp;

14- transition zone from the side surface of the rim to the inner;

15- side surface of the rim.

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The essence of the invention consists in the fact that during the preliminary formation of the preform, its auxiliary part in the caliber is positioned so that in the process of the final formation of the preform the metal is completely filled with the caliber of the rim.

FIG. 1-5 shows the scheme of manufacture of products of the type of crowns. At the same time, the initial billet 1 (Fig. 1) is pressed onto a press with a force of 4000 t-s with flat plates 2, the central zone is dispersed by a punch 3 (Fig. 2) and a billet 4 is obtained. Then, with a press of 800 pressurized 5, the billet 6 is pierced with a press Fig. 3), after which the blank 7 is preliminarily formed in the upper 8 and lower 9 stamps with a curvature of the primed part 10 at an angle a equal to the angle of inclination of the outer surface 11 of part 10 (figure 4). This rotation is achieved by the fact that the inner surface 12 of the upper die 8 has a larger diameter than the inner surface 13 of the lower die 9 by the size of the tolerance field of this size in the finished product. In the process of the final formation of the workpiece, due to the equality of the angles a of the side of the workpiece and its outer surface, an intense metal flow will be observed in the transition zone 14 from the side surface 15 and the inner surface 13. As a result, the rim configuration is performed across all its elements (Fig. ) and provides a reduction in allowances for machining and, consequently, saving metal. The specific choice of the diameters of the surfaces 12 and 13 depends on the dimensions of the particular product and, if the necessary difference between them is lacking, due to the dimensional tolerances, this difference is assumed to be necessary due to the additional allowances.

Thus, the indicated combination of features is necessary and sufficient to achieve the objective of the invention, and the distinctive features should be considered essential.

PRI me R. Under laboratory conditions, experiments were carried out on the preliminary formation of a preform with a bend in the priory part of the products and subsequent final molding using the initial lead preforms. At the same time, the initial billets with a height of 31 mm and a diameter of 80 mm were upset to a height of 18 mm, carried out by distillation with a punch with a diameter of 50 mm to a depth of 8 mm, after which the billet was sewn with the same punch. Then, the billet was pre-molded with stamps with inner surface diameters (12 and 13) equal to 138 and 134 mm, respectively, and the inclination of the outer surface 11 of the rim 5 °. In this case, the side part of the workpiece was rotated (surface 15 / at an angle of 5 °. This rotation was made by selecting the diameters of the upper and lower molding dies (138 and 130 mm). At the final stage

deformations molded rim with the implementation of the required shape and size.

In the ring-rolling shop of the plant. K.Libknecht (Dnepropetrovsk) experiments on the manufacture of experimental

Party crowns on the proposed technology. The original billet weighing 195 kg, with a diameter of 400 mm and a height of 155 mm was upset with flat plates to a height of 78 mm on a press with a force of 2000 tons-s.

a pick-up by a punch with a diameter of 250 mm to a depth of 40 mm on a press with a force of 4000/2000 t-s, after which a jumper was sewed with the same punch. Then preformed the billet in stamps with internal

diameters (upper and lower), equal respectively to 690 and 682 mm, and the inclination of the outer surface of the rim a 5 °. In this case, the pore portion of the workpiece was rotated by 5 °. The subsequent formation of the workpiece crown ensured the implementation of the required configuration and dimensions of the rim of the product. This allowed to reduce the allowances for product processing from 9.5 to 5.5 mm on the side of the elements

rim, which provides metal savings on a single product up to 14.6 kg. With a production program of 26 thousand pieces per year, the total metal savings will be 379,600 kg. At a price of 1 ton of metal for crowns, 105 rubles.

The effectiveness of the method will be about 40 thousand rubles.

Claims (1)

The invention The method of manufacturing products of the type rims with a rim and disc from an upset and stitched workpiece, including pre-forming a disk in thickness, forming the final disk dimensions in thickness and the rim in height and on the outer conical surface, characterized in that, in order to save metal by increasing the accuracy of dimensions and configuration rim in the process of preliminary the disk is formed by bending the side of the workpiece towards the smaller diameter of the outer conical surface of the rim by an angle equal to the angle of inclination of this surface. S§§S // In /////, 9 u / 51 Y //// U /// Ј2222222 g u W ////////// S V //// 777; RS Ј1 51 U U // 7 / 7L s 9 U //// 7 // 7 // I-g Ј g