Way vessel fabrication of sheet metal

 

(57) Abstract:

Use: for the manufacture of cylindrical vessels with spherical bottoms used in the products of aviation technology as vessels in nuclear reactors and other inventive way vessel fabrication of sheet metal includes obtaining a cylindrical shell, the manufacturing of two convex bases, consisting of a conical shell with welded thereto drives, welding the latter to the cylindrical shell and the distribution of the obtained semi-cylindrical cavity by the fluid pressure generated from the inside, to make the grounds of the desired spherical shape. The end-to-end radius of the cylindrical cavity is made equal to the radius of the spherical surface of the bottom. 7 Il.

The invention relates to metal forming and welding, and in particular to methods of manufacturing a cylindrical vessels with spherical bottoms widely used in aircraft products as containers for fuel in nuclear reactors and other

There is a method of making vessels from sheet metal, under which he includes obtaining cylindrical shells, making two vypolnenija convex bottoms must press equipment double action and exhaust stamps, the use of which leads to significant cost and time for preparation of production and manufacturing of the products.

Closest to the proposed invention to the technical essence and the achieved effect is way vessel fabrication of sheet metal, including the production of a cylindrical shell of length equal to the length of the cylindrical part of the vessel, the manufacturing of two convex ends and welded them to the cylindrical shell, as well as the distribution of the obtained semi-finished product by pressure applied from the inside to make the bottoms of the required form [2]

However, application of this method involves only the finishing of manufactured vessel with stamped from sheet metal bottoms to the desired shape gidrorazryva vessel without changing the essence of the manufacture of the heads on special hydraulic presses and using complex and expensive exhaust stamps.

Technical result achieved when using the invention is that getoradata workpiece is accompanied not only by calibration of the cylindrical part of the vessel, but bustanoby the forming end sections of the respective semi-finished product, contributing creatures who predlogennyi way vessel fabrication of sheet metal, including the production of a cylindrical shell of length equal to the length of the cylindrical part of the vessel, the manufacturing of two convex bases and welded them to the cylindrical shell, as well as the distribution of the obtained semi-finished product by pressure applied from the inside to make the grounds of desired shape, characterized in that each base is carried out in a conical bowl, obtained by welding a disk of sheet metal bent and welded along generatrix of a conical shell, and the distribution of the obtained semi-finished product is carried out in a cylindrical through cavity radius equal to the radius of the spherical surface of the bottom.

In Fig. 1 shows in isometric constituent elements of the semi-finished product for hidromasaje in a cylindrical vessel with a spherical heads; Fig. 2 hollow welded prefabricated for hidromasaje; Fig. 3, 4 and 5 the position of the semi-cylindrical cavity before hidromasaje, in the intervening time hidromasaje and at the end of the cylindrical vessel with a spherical bottom, respectively; Fig. 6 and 7 the device in the initial and intermediate positions when hidromasaje, the cross-section.

The elements of the semi-finished product I have which is equal to the length of the cylindrical part of the vessel, as well as fitting 6, which are welded to one of the disks.

Each base is carried out in a conical bowl, obtained by welding, for example, disk 1 of sheet metal bent and welded along generatrix of the conical cowling 3.

Welded base in the form of conical cups 7 and 8 are welded to the cylindrical shell 5, resulting in a gain semifinished product 9 with the nozzle 6 (Fig.2), which are placed in end-to-end cylindrical cavity 10 (Fig.3).

When the flow through the nozzle 6 of the liquid 11 under pressure into the inner space of the semifinished product 9 carry out the calibration of the cylindrical part of the product and intermediate forming conical bases (cups) 7 and 9 of the intermediate product 12 in a spherical bottom (Fig.4). When pressure is close to the value according to the formula qSF= , end parts of the intermediate product 12 receive the spherical shape of the article 13.

After the formation of a cylindrical vessel with spherical bottoms remove the liquid from the receptacle and remove it from the cylindrical through cavity 10.

The necessity of using a cylindrical through cavity in the implementation of the proposed method due to the fact that for plastics installed by the formula

qC= , which is two times lower pressure qSFrequired for distribution of conical cups in the material 9 in the hemisphere of the product 13. In this regard, the creation of fluid pressure for forming spherical bottoms in a cylindrical vessel without the use of cylindrical through cavity 10 will lead to the swelling of the cylindrical part of the semifinished product 9 and, consequently, to marriage in the manufacture of products 13. That is why the proposed method of making vessels from sheet metal using a cylindrical through cavity enables the production of cylindrical vessels with spherical bottoms while significantly reducing labor costs and time due to Bashtanovka forming spherical bottoms of the vessels.

Implementation of the proposed method is examined on the example of the manufacture of a cylindrical vessel with a length LC3000 mm, diameter D 1000 mm with spherical bottoms of radius RSF500 mm stainless steel HNT thickness Sabout3 mm (in54 kgf/mm2).

Manufacturing components 1, 2, 3 and 4 of the semi-finished product is cut two disks 1 and 2, the diameter D of the DSF/2 500 mm and two sweeps in the form of half rings with outer and inner is rtki 180aboutthe latter curve in conical shells 3 and 4 with the diameters of the bases, respectively, 1000 and 500 mm, which first weld along, and then the conical shells 3 and 4 together with discs 1 and 2 welded to the conical bowl 7 and 8. In addition to trevance receive a cylindrical shell of diameter DC= 1000 mm and length LC3000 mm, which is welded along its generatrix, and then to the cylindrical shell 5 are welded two tapered bowl 7 and 8, resulting in a gain of prefabricated 9, to one of the discs which are welded fitting 6.

The resulting intermediate product 9 are placed in end-to-end cylindrical cavity, the length of which is maintained at 100-200 mm greater than the length LC, i.e., L 3100-3200 mm Through the nozzle 6 into the semifinished product 9 serves fluid under pressure qSFconstituting

qSF= 0,605 60,5 ATM 6,05 MPa. The result is the desired product 13.

The proposed method of manufacturing a cylindrical vessels with spherical bottoms unlike the prototype is characterized bespressovyj manufacture these products at low cost on a cylindrical through cavity, and the process of forming these vessels provides simultaneous monitoring products, the cylindrical shell length, equal to the length of the cylindrical part of the vessel, the manufacturing of two convex bases and welded them to the cylindrical shell, as well as the distribution of the obtained semi-finished product by pressure applied from the inside to make the grounds of desired shape, characterized in that each base is carried out in a conical bowl, obtained by welding a disk of sheet metal bent and welded along generatrix of a conical shell, and the distribution of the obtained semi-finished product is carried out in a cylindrical through cavity radius equal to the radius of the spherical surface of the bottom.

 

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