The method of producing complex components rotary extractor
(57) Abstract:Usage: when rotating the hood preheated workpieces made of hard metals and alloys. The inventive method includes setting the workpiece on a rotating mandrel, the relative axial displacement of the tool rollers during movement of the tool by tilting it relative to the axis of the mandrel. The deformation is subjected to a pre-heated workpiece, relative axial movement of the tool carried out during movement of the mandrel along the axis, and the angle between the axis of rotation of the tool and the axis of the mandrel is reduced in the deformation process. 2 Il. The invention relates to metal forming, and more particularly to a method of rotary exhaust pre-heated billet from hard metals and alloys for details of a complex configuration type hemispheres, cones, or both surfaces of the rotation.Known rotational extrusion conical parts from flat blanks, in which the extrusion is carried out at the movement of the roller in mutually perpendicular directions: one along the axis of the mandrel, the other perpendicu the tee design.The closest to the technical nature of the claimed method is rotational extrusion of hollow parts with a flange, comprising a rotary extractor shell and forming the flange part of the cyclic movement of the forming tool on a trajectory aimed at an angle to the axis of the handle, while in the process of movement along the trajectory changes the angle of the tool 
The disadvantage of the above method are the limited technological capabilities, for example, in parts of the rotary hood thick-walled workpieces made of hard alloys, because the conduct of the deformation with a significant layer of floating metal and the simultaneous implementation of complex movement Raskatov roller requires high rigidity.The present invention is the task of expanding the technological capabilities of the method in part of the rotary hood thick-walled workpieces made of hard alloys by organizing deformation with less stringent requirements for kinematic and power schemes.The problem is solved due to the fact that in the method of producing complex components, including the mouth is the movement of the tool by tilting it relative to the axis of the mandrel, according to the invention the deformation is subjected to a pre-heated workpiece, relative axial movement of the tool carried out during movement of the mandrel along the axis toward the tool, and the angle between the axis of rotation of the tool and the axis of the mandrel is reduced relative to its original position.The possibility of solving the problem due to the fact that the complex motion of one body is replaced by a sum of simple movements from several agencies to organize and control each of which is energetically more profitable and simpler, additionally, the motion are integrated so that the necessary efforts can be achieved at lower energy costs.In Fig.1 is a diagram of the method for the initial position of the roller; Fig.2 end position.The method is implemented as follows. The workpiece 1 is mounted on the mandrel 2. Included drive rotation of the mandrel (not shown). Rolled head with raschetnymi rollers 3, which directly produce the processing of the workpiece, are installed in the original position to the beginning of the deformation. In this case the angle between the axis of rotation of the roller and the axis of rotation of the mandrel1,2- min is the value of the mandrel. At the moment of contact with the workpiece rolled rollers starts forming part of the workpiece. During movement of the mandrel along the axis up rollers penetrate into the workpiece to the desired depth.Then on the drive turn heads rolled, with rolled rollers 3 mounted on rolled the heads can be rotated about its own axis. This rotation is due to the frictional forces arising during the implementation of the rollers to the workpiece. Changing the angle of rolled heads and magnitude of movement of the mandrel with attached to it procurement exercise consistently, depending on the shape of the surface that must be obtained during the deformation, with each position of the mandrel corresponds to a certain angular position of the heads rolled. In the process of deformation of the portion of the metal billet is moved raschetnym roll on the mandrel. Angle rolled heads to the axis of the mandrel only reduced to2(see Fig. 2), providing one-way movement of the mandrel and roller. The relative movement of workpiece and tool simplified power circuit, which in turn increased the stiffness characteristics of the device and thereby the logical possibilities of the method.At the Institute this method is designed for rotary exhaust hemispherical parts of the disk workpiece dimensions: l=660 mm, H=110 mm, steel HM (GOST 4543-71) to obtain details with dimensions: l=670 mm H=402 mmThe billet is preheated up to 950-1000oC, is mounted on the mandrel. Rescata head is set to the initial position at an angle of 60oC to the longitudinal axis of the spindle. In the deformation process raskatnoe roller is introduced into the workpiece to a depth of 46 mm, the Deformation is carried out while moving the mandrel to a value of 650 mm with a speed of 2.20 mm/min and the corresponding rotation axis of the roller 60 until the 27o.Stretching and shaping of the profile part is provided by moving the metal roller relative to the mandrel. In the drawing the thickness of the items received was 38 60 mmAfter the deformation amount of machining is reduced to a minimum (withdrawal of allowances, performance grooves, grooves, threaded holes, and so on)e The method of producing complex components rotary extractor, in which the workpiece is mounted on a rotating mandrel, deform tool that is installed with the possibility of changing the angle of inclination referring to plastic state, in the process of deformation of the workpiece is moved on a rotating mandrel along the axis toward the tool, and the angle of inclination of the axis of rotation of the tool to the axis of rotation of the mandrel is reduced relative to its original position.
FIELD: plastic metal working, possibly manufacture of ring blanks by expansion.
SUBSTANCE: method comprises steps of placing blank between central and pressure rolls and two stop rollers; arranging stop rollers symmetrically relative to deformation plane that passes through axes of central and pressure rolls; determining arrangement of outer cylindrical surface of ready article; providing engagement of stop rollers and outer surface at predetermined effort directed along lines normal to outer cylindrical surface of ready article while arranging normal lines by angle relative to deformation plane; inclining normal lines by predetermined angle selected in range given in claims of invention; at expanding and sizing operations, arranging stop rollers with possibility of displacing them from deformation plane.
EFFECT: enhanced accuracy of articles due to lowered out-off-roundness of blanks, reduced vibration of blanks and apparatus.
FIELD: plastic working of metals, possibly manufacture of cone or ogival thin-wall parts of hard-to-form materials by spinning.
SUBSTANCE: method comprises steps of deforming rotary blank by means of deforming tool moved along generatrix surface of part; imparting to tool oscillation with predetermined frequency and amplitude depending upon part profile; controlling amplitude value according to condition for providing predetermined roughness degree of part surface.
EFFECT: improved quality of surfaces of formed parts.
FIELD: technological processes.
SUBSTANCE: before deformation the stock is placed onto work holder, side surface of which is conjugated to the butt along radius, with projection of its end portion above work holder butt. At that metal volume of projected stock end portion corresponds to the metal volume of finished part bottom portion. The lever with forming tool is rotated relative to axis, which is located at a certain distance from the working surface of forming tool. Device for method implementation contains forming tool, which is located at the lever, installed with the possibility of rotation relative to axis, which is perpendicular to stock axis, work holder, side surface of which is conjugated to the butt along radius, which corresponds to the radius of finished part internal side surface conjugation with its bottom portion. Lever is installed on the holder with the possibility of rotation relative to axis, which is located at a certain distance from the working surface of forming tool, which corresponds to the radius of finished part internal side surface conjugation with its bottom portion.
EFFECT: capabilities are expanded.
2 cl, 4 dwg
SUBSTANCE: invention can be used at manufacturing of cylindrical shells by rotary drawing with thinning from martensite - ageing steels with wall thickness ratio. Blank is installed on mandrel with interference. Rotary drawing is implemented with specified degree of deformation and with value of relative interference.
FIELD: process engineering.
SUBSTANCE: invention relates to machine building and can be used in producing shell structures with curvilinear work surfaces. Flat thin-wall preform is pressed towards shaping surface of detachable tool. Note here that, simultaneously, curvilinear section with curvilinear work surfaces are formed along with two-layer shaped stiffness ribs jointing the latter together that are produced from preform fragments not involved in forming curvilinear sections of the shell. Shell thickness is made equal to that of preform, while detachable lower die is removed through open zone on the shell extreme edge side.
EFFECT: higher accuracy of shells and efficiency of their production.
6 cl, 16 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and may be used in producing thin-wall shells from maraging steel. Hollow shaped workpiece is made from bar section by extruding and cutting. Shaped workpiece consists of large and small cylinders jointed by adapter cone and features wall thickness varying in height. Large cylinder wall thickness is twice is lathe as that of adapter cone. That workpiece is subjected to extrusion and thermal treatment for stress relief to make thin-wall shell. Rotary extrusion is carried out in three stages with tolerable strain of thin-wall shell. At first stage, workpiece large cylinder is machined to wall thickness equal to or smaller than that of adapter cone. Then local rotary swaging of larger cylinder and final machining are performed.
EFFECT: reduced metal consumption, higher quality of final products.
3 cl, 6 dwg, 1 ex
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and may be used in producing thin-wall shells from low-plasticity aluminium alloys by rotary drawing. Prior to rotary drawing, thick-wall billet is heated to temperature making 0.5-0.6 of aluminium allow high annealing temperature. Rotary drawing is performed with billet thinning. Produced thin-wall shell is subjected to thermal treatment to impart preset mechanical properties to aluminium alloy and final cutting.
EFFECT: higher precision and surface quality.
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to production of thin-wall high-strength shells from steel tube billets. Tubes made from killed steel represent said billets. Forming is performed by rotary and/or press processing to produce curvilinear, transition and cylindrical sections with axial direction of deformation. First, machined are transition conical and curvilinear parts with wall thickness and ultimate strength increasing and diameter decreasing toward reduced end. Then, transition part with variable cross-section and cylindrical part with tapering wall sections are processed in opposite direction. Note here that transition part is formed with cylindrical fillet with inclination of smaller than inclination of transition part generatrix in initial machining. At the end of machining, annealing is performed to reduce strain at 340-360°C.
EFFECT: higher surface precision and quality.
10 cl, 8 dwg, 1 tbl, 2 ex
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to rotary drawing of ogival and conical articles. Billet drawing is carried out at mandrel by, at least, two spinning-rolling rolls arranged displaced relative to each other. In said drawing, front roll deforms the billet by reduction making half the preset amount while rear roll deforms it to preset thickness in continuous deformation zone. Displacement of rolls in vertical plane is defined by enclosed formula.
EFFECT: required quality of inner and outer surface and accuracy of article wall thickness.
FIELD: process engineering.
SUBSTANCE: invention relates blanking, particularly, to cold forming, namely to rotary forming. Before rotary forming, billet central zone is subjected to local hardening. For this, free running rollers are used to form recesses, their shape and size being defined proceeding from required degree of hardening and billet material properties. Then, said recess are rolled out.
EFFECT: improved mechanical properties.
2 cl, 2 ex, 4 dwg
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.