SU1243873A1 - Method of producing flat articles - Google Patents

Description

11243873

The invention relates to the processing of allahs by pressure and concerns the manufacture of plates or thick slabs, which can be used in Gui- rine from a straight line.

baths in heavy, power and some other areas of mechanical engineering.

The purpose of the invention is to improve the quality, reduce metal consumption and labor intensity. -

FIG. 1 shows the annular billet and its cut-out areas in FIG. 2 is a semi-finished product with a reverse curvature profile in FIG. 3 - finished product; in fig. 4 is a diagram of the breeding edges of the cut cylindrical billet; in fig. 5 is a diagram of the formation of a reverse curvature profile.

The method of making a slab-type article is carried out by the following

At the ring blank, obtained from an ingot by forging with firmware and rolling, cut the wall along the axial Plane in one or several places. A semi-cylindrical or sector semi-finished product is bent in a cold or preheated state by giving it a reverse curvature in the middle section and a wave-shaped workpiece is obtained. With

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using a cylindrical billet with a single slit in front of a flexible one, spread its edges by an angle of 45 ... 90 °. Bending of the workpieces is carried out in the middle section 0.2 ... 0.5 in width of the workpiece sweep on the reverse curvature with a radius of 0.5 ... 1.5 of the radius of the cylindrical workpiece. When deviating from the indicated process parameters, the design stamps and oaz-bend technology wavy workpiece.

The winner of the implementation of the method is the production of two plates with dimensions of 5500 - 5200 m and a thickness of 340 mm from a cylindrical billet with an external diameter of 3700 mm. Cylinder billet forged from

ingot weighing 235 g. Two sections of its wall are made into two equal parts. Then, the workpiece is bent in the middle section with a width of 2200 mm to form the reverse curvature along

average radius of 1700 mm. After this wave-like workpiece is unbent under the press into the plate. The plates obtained are to be used for the manufacture of the WWER model reactor bottoms.

1000, having an internal diameter of 4000 mm.

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Fig 4 Compiler V.Veschekov Editor S.Lisina Tehred V.Kadar Proofreader I.Erdeyi

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VYIIPI USSR State Committee

for inventions h discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5

Production

printing enterprise, Uzhgorod, st. Project, 4

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Claims (3)

1. METHOD FOR PRODUCING FLAT DETAILS by performing at least one cut in a diametrical plane on an annular blank and unbending the obtained semifinished product, characterized in that, in order to improve quality, reduce metal consumption and laboriousness, before unbending in the middle section of the semifinished product of length 0, 2 ... 0,5 of the length of its sweep form a profile of inverse curvature along the radius of 0.5 -... 1.5 radius kol—. price blanks. 2. The method according to claim 1, distinguished by the fact that when using a semi-finished product obtained from ¹ annular blank with one cut, it is necessary to dilute its edges before forming the profile of the inverse curvature. At an angle 45 ... 90 °. 3. The way popp. 1 and 2, different. the fact that divorced. The edges are produced by applying forces on the side of the cut. SU,. „1243873 fig. 1