A method of manufacturing cylinders
(57) Abstract:Use: treatment of metals by pressure. The inventive method includes heating the ends of the workpiece and the rolls. Then do the heat treatment of the workpiece and one of the operations of the internal surface cleaning termomassazhnye. Next, perform shot blasting the inner surface and application of a fluoropolymer coating. The invention relates to the processing of metals by pressure and can be used in machine building industry in the manufacture of cylinders designed for storage and transport of compressed and liquefied gases, in particular bottles to be used as automotive fuel tanks.Known methods of manufacturing containers of hot-rolled billet firmware in hot condition, followed by forming a "Cup", and then the neck of the container (US patent N 3948073, CL 21 D 21/24, 1976). Sheet blanks by means of deep drawing cold (U.S. patent N 4148208, class B 21 D 22/20, 1972), as well as from a tubular piece forming the bottom and the neckline (Kaparovich Century, the Running-in of hardware in production. M. Engineering, 1973).Naitove, degreasing the inner surface of the balloon preform, shot blasting the inner surface and enamel, baking enamel, heat the end of the workpiece and the sealing plate, heating the other end of the workpiece and the sealing cap, heat treated cylinder, machining neck and hydrotesting (ed.St. USSR N 1754298, class B 21 D 51/24, publ. 1992).The technical result of the invention the improvement of the quality of the container and increase the productivity of the process.The method comprises the following process steps: pipe is cut into blanks, heat up one end of the billet and rolled the bottom, after heating the second end of the workpiece roll neck, then thermoablative cylinder, conduct blasting cleaning of the internal surfaces are coated (fluoropolymer), burn it, make the machining of the neck and hydrospatial the container.P R I m m e R. the Making of a cylinder capacity of 50 l of the pipe h,5 mm, steel HM.The pipe is cut on the balloon preform length 1720 mm Balloon preparation served in a heating device, such as inductor for heating one end of the workpiece to 1200aboutC. Then the workpiece with the heated end is served in Zack is guilt. After that, the container is fed to the heat treatment regime: heating at 900aboutC for 40 min with subsequent cooling in water. Simultaneously with the heat treatment container is termomassazhnye inner surface. Then the balloon serves to position shot blasting, where the inner surface of the cylinder is freed from the dross and her pridetsja roughness Rz40. Then the container arrives at the position of the coating, where its inner surface is applied fluoropolymer coating, for example, the powder in an electrostatic field. As the fluoropolymer powder is used, for example, Teflon brand LD-1-400. After applying a layer of powder realize it melt at 350aboutC for 4 min and get a coating thickness of 100 μm. Then the balloon is supplied to the operation of machining the neck, hydrotest and next cycle.The test results of the proposed method in comparison with the prototype showed that the quality of the indoor coverage has improved, the marriage because of the discontinuity of coverage has decreased in 2 times, process productivity increased by 13% due to the consolidation of operations termoeletricidade and heat treatment, as well as for controversely workpiece, the coating on the inner surface, heating the ends of the workpiece and sealing by forming on one end of the bottom, and the other cap, wherein the first carry out heating of the ends of the workpiece, sealing, then simultaneously perform heat treatment of the workpiece and one of the operations of the internal surface cleaning her termomassazhnye, then perform another operation of cleaning the inner surface shot blasting, next to the internal surface applied fluoropolymer coating.
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