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 otherThere 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 
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.
FIELD: plastic working of metals, namely manufacture of high-pressure bottles.
SUBSTANCE: method comprises steps of forming shell; swaging at least one open end of shell; forming bottom and mouth while making at least two mutually joined cone surfaces and increasing central angle from shell to mouth; at least after one swaging operation performing heat treatment of swaged end of shell. High-pressure bottle includes shell and two bottoms. One bottom has mouth for placing locking means. Bottom and mouth are made as one piece. Bottom from shell until mouth is in the form at least of two joined lateral surfaces of circular regular truncated cones. Each such joint is performed due to joining lateral surfaces of truncated cones along lines of bases of their small and large diameters respectively. Said joints may be smooth, with radius transitions.
EFFECT: simplified design of bottle, enhanced technological effectiveness of making it.
6 cl, 4 dwg
FIELD: plastic working of metals.
SUBSTANCE: method comprises steps of making shell, upper bottom, mouth, lower bottom and joining all parts by welding; forming lower bottom as one piece with backing flanged ring; inserting lower bottom into shell along backing ring until flange rests upon shell; butt welding shell and lower bottom on backing ring.
EFFECT: enhanced centering due to accurately inserting lower bottom to shell, improved quality of welded seam of lower bottom and shell, lowered labor consumption for making bottle.
1 dwg, 1 ex
FIELD: machine engineering, possibly manufacture of sealing envelopes of corrosion resistant steels of metal-plastic high-pressure bottles.
SUBSTANCE: method comprises steps of separately making metallic convex bottoms with cylindrical collar and backing ring. Thermal expansion factor of backing ring exceeds that of bottoms; outer diameter of backing ring provides close fit of bottoms onto it at 20°C; cooling preliminarily assembled backing ring with bottoms until cryogenic temperature; sliding bottoms on backing ring in cooled state until mutual touch of cylindrical collars of bottoms; heating assembly up to 20°C in order to provide close fit of backing ring in cylindrical collars of bottoms; welding bottoms along butt of assembly and then removing backing ring by chemical milling.
EFFECT: simplified process of making envelopes with enhanced mass characteristics.
2 cl, 4 dwg, 1 ex
FIELD: storing or distributing liquids or gases.
SUBSTANCE: method comprises molding at least of two sections of the vessel whose one bottom has an opening, and joining the sections together by outer and inner seam weld. The inner welding is performed before the outer welding. The inner and outer seams are overlapped. The inner seam weld is performed through the opening in the bottom of one of the sections to be welded.
EFFECT: reduced labor and metal consumptions.
1 cl, 3 dwg
FIELD: plastic metal working, namely shaping hollow variable cross section bodies.
SUBSTANCE: method comprises steps of shaping in die having opening for introducing hollow body and profiled inner surface corresponding to desired profile of hollow body; creating on inner surface of die temperature gradient increased in direction of hollow body motion from minimum temperature near inlet opening of die to maximum temperature in zone of least cross section of body; setting maximum temperature according to condition of largest yielding of body material; setting minimum temperature according to condition of keeping stability of body and heating body till said maximum temperature during its motion in die. In order to make metallic liner of metal-plastic high-pressure vessel from tube blank, ends of tube blank are squeezed in die with profiled inner surface. Tube blank is guided into die along its lengthwise axis. On inner surface of die temperature gradient is created in such a way that it increases in direction of blank motion along lengthwise axis of die from minimum temperature at inlet of die till maximum temperature in zone of least cross section of liner. Maximum temperature is set according to condition of largest yielding of tube blank material; minimum temperature is set according to condition of keeping stability of blank and heating blank till said maximum temperature during its motion in die. Apparatus for shaping hollow variable cross section body includes die mounted on stationary support and having inner surface of preset profile and also having inlet opening for feeding hollow body. Apparatus also includes slide made with possibility of mounting on it hollow body moving along lengthwise axis of die. Die is provided with heating unit for creating on inner surface of die temperature gradient increased along lengthwise axis of die from its inlet opening.
EFFECT: improved quality of articles due to prevention of stability loss.
16 cl, 2 ex, 6 dwg
FIELD: plastic metal working.
SUBSTANCE: method comprises setting the blank in the mandrel provided with the cylindrical and shaped sections, locking the blank in the cylindrical section of the mandrel, and affecting the blank by deforming rollers. The shaped section is initially formed by moving the rollers in different trajectories during one or several runs. Upon unlocking the cylindrical section, the blank is locked in the shaped section and the cylindrical section is drawn by moving the rollers in the opposite direction.
EFFECT: expanded function capabilities.
1 cl, 3 dwg, 2 tbl
FIELD: mechanical engineering; pressure vessels.
SUBSTANCE: according to proposed method, spheroidal bottom is made of sheet, thickness of 0.5-0.6 of designed thickness for initial elliptical bottom and is subjected to deformation at higher process upsetting pressure of 1.3-1.5 of designed value.
EFFECT: facilitated and reduced cost of manufacture.
2 cl, 1 dwg
FIELD: plastic metal working.
SUBSTANCE: invention can be used for making of bottles from sheet blanks. Proposed method includes making of shell, top plate, neck, bottom plate made integral with support ring, flanging and shoe, assembling and connecting the parts by welding. Shell is butt-welded to bottom plate on support ring. Both plates are made of blanks of equal size and in form of bottom plate. When making top plate, support part of shoe is calibrated to bring its diameter to diameter of shell.
EFFECT: reduced labor input.
1 ex, 1 dwg
FIELD: plastic working of metals, namely manufacture of high pressure vessels from recovered ammunition.
SUBSTANCE: method comprises steps of producing blanks, subjecting them to hot deformation, hot molding of vessel mouths, mechanically working vessel mouths; subjecting articles to heat treatment for providing desired strength of vessels; using as blanks bodies of recovered artillery fragmentation type or high-explosive shells with removed collar; cutting each shell in joining zone of its ogival and cylindrical parts for preparing two blanks, namely cone blank with through opening and sleeve like blank with bottom. Heat treatment is realized according to preset mode.
EFFECT: lowered cost, improved factor of metal usage due to using recovered bodies of artillery fragmentation type high-explosive shells, enhanced quality of using shell steels.
4 cl, 2 dwg, 2 ex, 5 tbl
FIELD: pressure vessels.
SUBSTANCE: plastic-coating metallic vessel comprises outer load-bearing plastic shell and inner thin-walled welded steel shell whose intermediate section is cylindrical, two bottoms, and connecting pipe. The connecting pipe and at least one of the bottoms are made in block. The method comprises rolling out the rod from its one end thus defining the flange having flat circular surface from one side, working the unrolled section of the rod to form the outer surface and inner passage of the connecting pipe, rotating tension of the flange, moulding the bottom of a given shape, connecting the bottom to the intermediate cylindrical section, and welding the parts.
EFFECT: reduced labor consumption.
4 cl, 3 dwg