A method of manufacturing a cylinder
(57) Abstract:Use: treatment of metals by pressure. The inventive method comprises heating one of the ends of tubular workpieces, its sealing and cleaning of the inner surface. Then carry out the sealing of the cavity of the workpiece, heating it to a temperature of 100 - 150oC. Before sealing the other end of the cavity of the workpiece rethermalized. The invention relates to the processing of metals by pressure and can be used in pipe manufacture in the manufacture of cylinders.Known methods of manufacturing cylinders, which cylinders are manufactured from hot rolled billets, sheet blanks by means of deep drawing and their billets. A known method of manufacturing containers from tubular workpieces described in TLS 6.4-22-96-84 (Technological process of manufacture of the cylinders of the average volume of alloy steel for CNG vehicles on a separate processing line balloon shop Zhdanov metallurgical plant them. Ilyich, 1984), which are produced automobile cylinders. Cylinders made from the pipe by cutting the pipe on the balloon preform length, heating conc the womb, heat treatment, cleaning of the inner and outer surfaces from scale on the shot-blasting and sandblasting installations with subsequent painting. The inner surface is treated on three sand units. On the first handle at the bottom of the cylinder, the second cylindrical surface, and on the third spherical portion of the neck of the container with flow fraction through a special nozzle, which feeds the fraction in the opposite direction.Closest to the invention is a method for manufacturing cylinders, which produce heat treatment, drilling holes in the neck and additional cleaning of the inner surface of the cylinder (bottom) from scale using labor-intensive blasting or sandblasting.The technical result of the invention to reduce the complexity of manufacture of the container due to the exclusion of the operation of cleaning the inner surface at the last stage of manufacture of the container.A method of manufacturing a cylinder includes heating one of the ends of tubular workpieces, sealing it and cleaning the inner surface of the glass, heating the other end, sealing, heat treatment and drilling holes in the neck. After closing one end of labor is W ill result heating the entire glass up to 100-150aboutAnd before sealing the other end of the workpiece rethermalized.P R I m m e R. For the manufacture of a cylinder use the pipe diameter 219 mm, wall thickness of 6.5 mm Pipe cut on the balloon preform length 1200 mm Heated one end of the billet length equal to its diameter to 1100-1150aboutWith and produce sealing, for example, the bottom on the rolling machine. After the seaming heads make cleaning the inside surface of a glass cylindrical and spherical part) from scale and rust. On the other end of the glass wear a removable cover in the form of a cap made of sheet steel. The glass blank is heated to 100-150aboutC. When heating the glass up to 100-150aboutFrom inside an excessive pressure 0,03-0,04 MPa, which prevents the inner cavity of the fresh air (oxidant). Heated tank with cap serves to the furnace for heating the other end under the sealing cap. Heat the end of the glass to 1100-1150aboutWith, for example, in an induction furnace. The glass with the heated end to the temperature of 1100-1150aboutWith cap arrives on the rolling machine. Before sealing the cover shoot and produce the sealing cap. The sealing cap lasts 5-10 with additional pogostkina excess pressure, that protects the internal cavity from the fresh air (oxidant). The sealing cap is produced to close the holes. Then the container is fed to the heat treatment with a closed mouth, that is, the neck has not yet been processed and has no holes. As in the closed volume of the container is small amount of oxidizer (air), when the heat treatment container is not scaling. The amount of oxidizer (air), located in the container, just enough for the formation of the oxide film, which is the fuse metal from corrosion. After heat treatment of the container make drilling the neckline. A METHOD of MANUFACTURING a CONTAINER comprising heating one of the ends of tubular workpieces, its sealing and cleaning the internal surface of the workpiece, heating the other end, sealing, heat treatment and drilling holes in the neck, characterized in that after cleaning the inner surface of the cylindrical and spherical pieces are sealed cavity of the workpiece, heat it up to 100 - 150oAnd before sealing the other end of the cavity of the workpiece rethermalized.
FIELD: plastic working of metals.
SUBSTANCE: method for making ogival envelope by multi-transition spinning of sheet blank mounted in rotating mandrel at lengthwise motion of spinning tool mounted with gap relative to said mandrel. Gap between spinning tool and mandrel for any point of envelope profile is corrected by value determined according to relation given in claims of invention while taking into account corrections calculated for first envelope.
EFFECT: lowered value of wall thickness difference and mass, enhanced accuracy of geometry of envelope.
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: plastic metal working; treatment of parts made from niobium-based alloys in cold state.
SUBSTANCE: proposed method includes application of grease on surface of blank to be treated, placing the blank on mandrel and rotary extrusion of it by pressing roller. Blank is coated with nitrocellulose lacquer and is held in air till lacquer becomes sticky; tester leaves trace on surface of lacquer but lacquer does not follow it. Then graphite is applied to sticky surface and blank is placed on mandrel for subsequent treatment.
EFFECT: improved quality of part surfaces due to avoidance of bond between tool and surface being treated.
3 cl, 4 dwg
FIELD: plastic working of metals, possibly by spinning.
SUBSTANCE: method comprises steps of cutting out disc blank of inner envelope and annular blank of ring adapter; forming annular groove in disc blank; fixing in it blank of ring adapter with designed dimensions; subjecting inner envelope combined with ring adapter to spin drawing with use of vertically arranged plug and rolling-out rollers. Operation modes are set according to mechanical properties of material of inner envelope of combustion chamber. Gaps for mounting rolling out rollers relative to plug are corrected while taking into account mechanical properties of ring adapter. Correction value is proportional to relation of metal layer thickness values in place of securing blank of ring adapter. Outer surface of ring adapter is turned in lathe after it has been drawn.
EFFECT: improved quality of inner envelope of combustion chamber with ring adapter.