SU1321508A1 - Plate forging method - Google Patents

Abstract

The invention relates to the field of metal forming, in particular to methods of forging forgings such as plates. The purpose of the invention is to increase the productivity of forging by increasing the intensity of the Metal flow in the direction perpendicular to the axis of the ingot, as well as improving the quality of products, reducing the eccentricity of the deforming load. The striker, the length of which is 0.4-0.7 of the length of the ingot body, is forged in a bonded ingot with a longitudinal notch with a width of 0.25-0.60 of the ticket diameter. The recess is expanded by simultaneously compressing its walls by 0.3-1.3 of its original depth with a longitudinal feed of 0.50-0.95% for 1 striker, with a transverse feed of 0.1-0, 5 longitudinal. The method makes it possible to reduce the laboriousness of manufacturing plate forgings with a ratio of width to height up to 4.0-4.5 due to the intensification of metal flow in the direction perpendicular to the axis of the ingot. 2 Il.

Description

The invention relates to the field of metal forming, in particular to methods of forging plate type forgings, and can be used in forging and pressing shops of mills "5

20

25

power engineering.

The purpose of the invention is to increase the forging productivity by increasing the intensity of metal flow 0 in the direction perpendicular to the axis of the ingot, as well as reducing the eccentricity of the deforming load.

FIG. 1 shows a scheme for forging a longitudinal excavation; in fig. 2 is an extension diagram of this recess.

The method is as follows.

The bobber 1, the length of which L is 0.4-0.7 of the length of the ingot body, is forged in a collapsed ingot 2 forged with a longitudinal recess with a width B constituting 0.25-0.60 of the diameter of the collapsed ingot. The recess is expanded by simultaneously compressing its walls by 0.3-1.3 of its original depth with a longitudinal feed B of 0.50-0.95 of the striker length L with a transverse feed of 0.1-0. 5 longitudinal. Lower firing pin 3 at both stages is flat.

Example. The method was tested when a plate was obtained: with dimensions of 30005 1800 700 mm made of steel ingot B St 5 Cn weighing 36 tons, the body length of which is 2500 mm, and the diameter of the lower base is 1290 mm,

The heated ingot is billetted to a diameter of 1250 mm and a longitudinal notch is drilled on its surface with a depth of 150 mm and a width of 500 mm. Forging is carried out from the bottom part by a striking length of 1000 mm with feeds of 750-800 mm. In the next two aisles, the two walls of the recess are simultaneously compressed onto the original glue. Forging.will with a longitudinal feed equal to 850 mm and a cross feed of 150 mm. After turning 180 ° along the opposite side, a notch with a depth of 200 mm and a width of 500 mm with feeds of 750-800 mm, which is 0.1-0.5 longitudinal, is forged.

After-forging with one ingot, purchase 1850 750 mm. After tee and hemming in moderation, they live along wide and flat strikers up to the depth of 1800– 700 mm, after the plate is chopped off.

It is proposed to reduce the labor intensity and wok of the plates with a ratio of height to 4.0-4.5, the coefficient is used due to the reduction of the forging faces.

Claims (1)

Formula of The method of forging the ingot axis of the ingot is located on the press, including an ingot with the axis of the press table and the distillation of several ingot axes from the forging and subsequent excavation by pressing them with intermediate edges, which differs in order to increase due to an increase in the metal perpendicular The eccentric load of the load, forging the broadening of which is directed at 0.4-0.7 body lengths to the original, is 0.25-0.6 45 tied ingot, and when it is expanded at the same time, the initial depth with whose equal to 0.50-0, thirty 35 40 50 cross feed five five 0 five 0 0.1-0.5 longitudinal. it is then expanded by forging in 3 passes with longitudinal feeds of 850 mm and transverse 150 mm. After forging with one turnout, the ingot body acquires dimensions of 3200 x-x 1850 750 mm. After the cutting of the bottom part and the hemming to the best of the ingot, it is ironed along the wide and narrow edges on flat strikers up to forging sizes 1800– 700 mm, after which the forging of the plate is chopped off. The proposed method makes it possible to reduce the laboriousness of manufacturing plate forgings with a ratio of width to height up to 4.0-4.5, and also to increase the utilization rate of the metal by reducing the sphericity of the side faces of the forging. Invention Formula A method of forging plates in which the ingot axis is positioned along the axis of the press table, including billetting the ingot with its axis positioning along the axis of the press table and its transverse distillation in several passes consisting of forging a notch along the axis of the ingot with subsequent expansion of the notch by compressing its walls, with intervening rigs of 180 ° between them, characterized in that, in order to increase productivity by increasing the intensity of the metal flow in the direction perpendicular to the axis of the ingot, and to decrease. The eccentricity of the deforming load, the forging of the excavation and its expansion are carried out by strikers, the length of which in the direction of the axis of the ingot is equal to 0.4-0.7 of the length of the ingot body, the initial width of the excavation being 0.25-0.60 of the diameter of 5 tied ingot, the compression of the walls of the gage with its expansion is carried out simultaneously by 0.3-1.3 of its original depth with a longitudinal feed equal to 0.50-0.95 of the striker length 0 five 0  0.1-0.5 longitudinal. 50 at cross feed, constituting BUT-/( 1 1 J us.2 Editor A.Vorovich Compiled by N.Timofeeva Tehred M. Morgenthal-. Order 2702/7 Circulation 582 Subscription VNIISH State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Corrector S.Cherni