The method of forging parts
FIELD: metal working.
SUBSTANCE: hard alloy matrix has casing, bushing pressed in the case and hard alloy insertion. Bushing has multifaced hole. Hard alloy insertion is composed by several sections made in form of trapezoidal-section prisms which have cut angles at their non-working edges. Number of sections corresponds to number of faces of item to be headed. Cuts of angles are made symmetrically to faces of working edge. Slits are made in several places of multifaced hole bushing at the ponts where faces cross each other.
EFFECT: improved resistance of matrix; simplified assembly.
3 cl, 1 dwg
FIELD: plastic working of metals, namely radial forging of housings of cylinders of plunger pumps, barrels of artillery guns, pipelines for chemical industry branches.
SUBSTANCE: method comprises steps of preliminarily applying onto inner surface of initial tubular blank technological lubricant and radial forging of blank for forming duct in it. Forging is realized on stationary short forging mandrel with cone working surface and simultaneously duct surface is ironed by means of additional mandrel with cylindrical calibration band for receiving final size, shape and roughness of its surface. Additional ironing mandrel is secured to forging mandrel at side of its cone surface. Liquid technological lubricant is positively fed through radial passages of forging die uniformly arranged along perimeter of cone surface and hydraulically communicated with lengthwise duct.
EFFECT: simplified process of making enhanced quality articles.
9 cl, 3 dwg, 1 ex
FIELD: plastic working of metals, possibly operations for finish working of forgings of double-end box nut wrenches.
SUBSTANCE: die set includes upper and lower plates with guiding columns, punch for punching operation mounted on upper plate, stripper, lower die for punching, half-open trimming lower die and trimming punch. Trimming lower die is mounted on upper plate; it has cutting edge and cavity arranged behind collar of cutting edge and designed for freely placing forging of nut wrench. Trimming punch is mounted on lower plate and it has embracing supporting surface for fixing forging at trimming and straightening operations.
EFFECT: enhanced quality of forging.
9 dwg, 1 ex
FIELD: plastic working of metals with use of intensive plastic deformation, production of nano-crystalline materials with improved mechanical properties.
SUBSTANCE: die set includes band in which cone insert having several parts is pressed; lower support; inlet and outlet ducts; ram. According to first variant of invention contours of parts of cone insert are restricted by means of two mutually normal planes and cone surface portion cut by said planes. Crossing line of said planes does not coincide with symmetry axis of cone surface. Inlet duct is formed by faces of cone insert parts arranged normally one relative to other and mutually joined; walls of said duct are in the form of portions of said planes. According to second variant of invention contours of cone insert parts are restricted by radius surface, by two mutually crossing planes and portion of cone surface cut by said planes. Crossing planes are mutually normal or they are inclined one relative to other by angle 120°. Axis of radius surface coincides with crossing line of said planes. Faces of cone insert parts are mutually joined; inlet duct is formed by their radius surfaces and outlet duct is formed by radius grooves.
EFFECT: lowered number of parts, reduced consumption of material for making cone insert.
4 cl, 10 dwg
FIELD: plastic working of metals in different branches of industry.
SUBSTANCE: apparatus includes supporting plate and housing with openings and duct. Punch, upper and lower stops are mounted in housing. Said stops may be in contact with blank by their flat notched surface. Movable lower stop is arranged in openings of housing and on supporting plate; it engages with said plate by its smooth surface. Hydraulic cylinder joined by its rod with lower stop is mounted on supporting plate. Upper stop is in the form of cylinder mounted in housing in such a way that it restricts together with punch inner cylindrical cavity of hydraulic system providing motion of lower stop. Said hydraulic system also includes duct of housing and hydraulic cylinder.
EFFECT: enlarged manufacturing possibilities of apparatus due to increased range of changing relation of shear deformation to compression deformation of blank.
FIELD: plastic working of metals, namely processes for pressing out shapes of aluminum base alloys, constructions of pressing out tools.
SUBSTANCE: method comprises steps of making blank, heating, hot pressing out of blank through die, heat treatment of shape. At pressing out blank is subjected in upper p[art of die to additional shearing deformations due to twisting it by angle in range 40 - 50° relative to axis of die. Die includes deforming cone, working rectangular collar and outlet zone. Deforming cone has two helical protrusions in the form of trapezium. Upper base of said trapezium is equal to length of rectangle of working collar; its lower base consists 1.5 - 2 of parts of said length value. Rotation angle of upper cross section of protrusion relative to its lower cross section is in range 40 - 50° relative to axis of die. In longitudinal cross section said protrusions are in the form of parabola.
EFFECT: possibility for making rectangular aluminum alloy shapes with enhanced mechanical characteristics and low anisotropy of their properties, improved design of die.
2 cl, 4 dwg, 1 ex, 1 tbl
FIELD: metallurgy, namely processes for forging titanium alloys and blank of such alloy suitable for forging.
SUBSTANCE: method comprises steps of preparing blank and forging it. Forging is realized at providing mechanical hardening factor equal to 1.2 or less and at difference of hardness values between central (along width) zone and near-surface zone equal to 60 or less by Vickers. Factor of mechanical hardening is determined as HV(def)/HV(ini), where HV(ini) - hardness of titanium alloy blank before forging; HV(def) -hardness of titanium alloy blank after forging at forging reduction 20%. Forging may be realized at deformation rate from 2 x 10 -4 s -1 to 1s-1 while keeping relations (T β - 400)°C ≤ Tm ≤ 900°C and 400°C ≤ Td ≤ 700°C, where Tβ (°C) -temperature of β-phase transition of titanium alloy, T m(°C) - temperature of worked blank; Td(°C) - temperature of die set. Blank has factor of mechanical hardening 1.2 or less and difference of hardness values between central (along width) zone and near-surface zone equal to 60 or less by Vickers.
EFFECT: possibility for forging titanium alloy blanks at minimum difference of material properties along depth, simplified finishing of blank surface after forging, reduced cracking of blank material, good workability of blank with favorable ductility and fatigue properties.
8 cl, 5 tbl, 6 dwg, 4 ex
FIELD: plastic metal working, possibly forging variable cross section parts by extrusion in hydraulic presses with movable container.
SUBSTANCE: method comprises steps of feeding heated blank to container; pressing out blank in container by means of pressure pad and extruding part of blank to die of die set; forming forging having constant cross section part and thickened part that is formed after upsetting remaining portion of blank; placing part of die set in container according to condition of joining their planes. Upsetting of remaining portion of blank for forming thickened part of forging is realized in cavity between joined planes of die set unit and container. Said cavity is formed due to moving die set unit relative to container before forming thickened part of forging. Upsetting operation is realized due to simultaneous motion of pressure pad and container.
EFFECT: possibility for making forging with complex outer and inner configurations, simplified assortment of technological tools, enhanced quality of forging.
2 cl, 9 dwg
FIELD: plastic metal working.
SUBSTANCE: invention can be used at plastic shaping of parts by orbital deformation method. Blank is made previously profiled in form of cylinder with ring flange. Dimensions of blank are defined by mathematical expression given in invention. Blank is placed between die and spherodynamic fluctuating deforming module and then is spinned. Ring flange of blank is made for providing its arrangement between die and said deforming module with clearance. Size of clearance between ring flange and die exceeds clearance between ring flange and deforming module by a factor of 10.
EFFECT: provision of deformation resonance in material in process of machining for realizing wave plasticity character in form of rotary modes of plasticity.
FIELD: metal working, possibly manufacture of flanged articles and articles without flanges of different alloys.
SUBSTANCE: method comprises steps of heating blank and deforming it in die set; sustaining relation of blank temperature to that of die set in range 0.7 - 7.4. Blank is heated in predetermined temperature range depending upon blank material. Said temperature range may be found from ductility diagram and(or) yield curves and(or) from blank material recrystallization diagrams.
EFFECT: enhanced factor of using metal, improved quality of articles, lowered labor consumption of forging and subsequent working of blank.
6 cl, 2 dwg, 2 ex
FIELD: machine engineering, possibly fitting manufacture, namely forming body parts of pipeline fittings.
SUBSTANCE: method comprises steps of forming bottom and branch pipe of body part from hot cylindrical tubular blank. Blank is placed in die set on squeezing punch and it is squeezed by means of lower die and then branch pipe is pressed out branch pipe with use of shaping punch in the same die set without replacement of blank. Formed bottom has constant thickness and branch pipe has variable thickness of wall.
EFFECT: improved operational reliability and strength of parts, lowered metal consumption and simplified process for making them.
FIELD: plastic working of metals, possibly forming parts such as housings of equipment of gas turbine engines.
SUBSTANCE: part having inner cavity, slopes and branches with lugs is formed by fin-free process at least for two transitions. Inner cavity of part is formed at last transition; lateral branches are formed before last transition. Lugs and slopes are formed at last transition simultaneously with formation of inner cavity. Branch with lug in bottom of housing may be formed simultaneously with inner cavity by pressing out.
EFFECT: improved quality of parts, lowered efficiency of process.
4 cl, 1 dwg, 1 ex
FIELD: plastic working of metals, possibly manufacture of sleeve type parts.
SUBSTANCE: method comprises steps of forming semi-finished product at deforming initial blank and calibrating it along outer lateral surface; pressing out cone cavity in semi-finished product by means of punch while providing displacement of excess metal occurred due to volume error of initial blank to end of semi-finished product; during one technological transition performing intermediate deforming of semi-finished product and finally forming part. In order to realize it, semi-finished product is placed in die of die set in such a way that its cone cavity is turned downwards and lower end of semi-finished product is placed with gap relative to bottom of die. With use of deforming punch cavity is pierced in semi-finished product in direction opposite to narrowing direction of cone cavity. Gap between lower end of semi-finished product and bottom of die is filled with material of semi-finished product and cone cavity is opened for forming metal scrap in front of deforming punch. Simultaneously metal scrap is removed and part cavity is calibrated.
EFFECT: lowered energy consumption of process.
10 cl, 11 dwg, 1 ex
FIELD: technological processes.
SUBSTANCE: for parts production cold-upsetting tool is used in the form of multi-position unit. Unit includes five positions and contains puncheons, thrusters, assembled matrixes and strippers. Assembled matrix in the fourth position is installed motionlessly and is equipped with reduction step at the insert. Stripper of the fourth position is arranged with the opening, in which spring-loaded puncheon is installed. Cut billet is subjected to setting and calibration with leveling of butt ends and formation of conical marks. By means of further billet setting head is created. Then opening is pressed out in the billet and its external diameter is reduced with formation of step. Reduction of diameter is carried out in motionless matrix with insert, which has reduction step. For that purpose billet is displaced until it thrusts stripper with spring-loaded puncheon with its butt-end. Puncheon is installed in billet pressed out opening. Later billet is displaced together with puncheon and stripper via reduction step of matrix. After that billet opening is interweaved.
EFFECT: expansion of technological resources.
2 cl, 4 dwg