Tool for radial forging
(57) Abstract:The inventive tool for radial forging contains two pairs of forging dies. The working surface of the heads of the formed lead-in and calibration plots. On the calibrating section Boykov the side opposite to the lead-in area is made deeper. In pairs opposite strikers recesses have different value. 3 Il. The invention relates to the processing of metals by pressure, namely the deformation of the workpieces on the radial crimp machines (RUM) and can be used in forging shops of machine-building plants.A well-known tool for radial forging adopted as the prototype, on the calibrating section which is opposite the lead-in area along the symmetry axis of the tool holds the deepening open with two of its adjacent sides, the other two adjacent sides of their faces is formed on the calibrating section, respectively, of wide and narrow part of it.The use of these Boykov for radial forging, provides in a single pass, the spiral formation of the projections and their compression. However, due to the fact that the deformation zone has og obitaemoj workpiece, that does not resolve the cast structure in the axial zone and to improve the machining quality of the workpiece.The purpose of the invention, the creation of such a tool for radial forging, which can ensure the penetration of deformation in the axial zone of the deformed workpiece and to improve the quality of the metal. For its implementation in the tool containing jaunty, on the calibrating section that has a recess on the side opposite the lead-in area, according to the invention the height of the recesses in pairs opposite strikers has a different value.In Fig. 1 and 2 show a pair of opposite jaunty for radial deformation, forming one pair of strikers; Fig.3 tool Assembly before forging.Tool for radial forging, contains Boiky with the lead-in and calibration plots. Calibrating areas Boykov consist of two parts wide 1 narrow 2 that are adjacent to each other. While l1the length of the widest part of the calibration plot, ltothe total length of the two parts of the calibration plot or its full length. The width of the narrow part of the calibration plot is 50% of the width of its widest part or the full width of the gage section, i.e., one of the Boko the wide and narrow part of the calibration plot form made it deeper, open with two of its adjacent sides. In pairs opposite strikers of grooves of different heights (H1> H2), where N1and H2the height of the recesses on the strikers, forming one pair.The tool works as follows (Fig.3).When the compression of the original piece, round in cross section, four strikers with different height cutouts on pairwise opposing strikers, formation of protrusions of different heights, and N1>H2(Fig.1 and 2). Upon further advancement of the workpiece and the casting-off at a certain angle, the following occurs: the protrusion height H1contact with the narrow part 2 (Fig. 1) calibration plot of the same brisk, plastic deformation occurs in the ledge and as opposite to the protrusion height H2<Hnot come in contact with the calibrating part of the striker 2 (Fig.3), then there is the plastic shear of the metal billet. When the deformation of the protrusion of the N1will be equal to the height of the protrusion of the N2there is a formation of the final smooth surface forgings.In the same way, a shift amount of metal and the second pair of strikers (Fig. 3). Thus at one stroke four Boykov >/P>Therefore, when the deformation of the spiral protrusions of different heights is macrodir metal in the cross section of the workpiece, which significantly improves the design quality of metal throughout the depth of forgings. TOOL FOR RADIAL FORGING, consisting of the heads, on the calibrating section which is opposite the lead-in section, along the axis of symmetry of the tool is made hollow, open with two of its adjacent sides, the other two adjacent sides of their faces is formed on the calibrating section, respectively, of wide and narrow parts, characterized in that the height of the recesses in pairs opposite strikers has a different value.
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: forging and forming processes and equipment, namely manufacture of elongated forgings with thickened portions and lateral branches.
SUBSTANCE: die set includes deforming punch, die with vertical parting, struts in the form of truncated pyramids having wedge-shaped slopes for mounting die; units for securing struts to supporting plate. Die is placed in struts with possibility of motion relative to them. Struts have double-sided mutually opposite slopes. Elastic member is placed under die. Maximum compression value of said elastic member by means of effort corresponding to effort of clamping die halves in struts is equal to value of descending die at forging process.
EFFECT: enhanced reliability and rigidity of die set.
2 cl, 1 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 meals, possibly manufacture of hollow parts such as sleeves, tubes, bushes by cold pressing out.
SUBSTANCE: method comprises steps of plastic deforming of blank at translation and rotation of deforming tool; realizing said motions of tool from separate drive units; setting speed of translation less than that of rotation and selecting relation of said speed values less than 2.5.
EFFECT: enhanced manufacturing possibilities of method.
2 cl, 2 dwg, 2 ex
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: plastic working of metals, possibly forging ingots and billets in hydraulic forging presses.
SUBSTANCE: apparatus includes two holders of upper and lower strikers having inclined surfaces. Said holders are kinematically coupled with two holders of lateral strikers having inclined surfaces corresponding to those of holders of upper and lower strikers. Four strikers are secured to respective holders by means of clamps and tightening studs. Each of upper and lower strikers has two working portions mutually divided by cutout. Each of lateral strikers has one working portion entering cutouts of upper and lower strikers. At least one adjusting plate is placed between holder of lower striker and lower striker. Lower striker is secured to its holder by means of two Г-shaped clamps. Inclined surfaces of said clamps are forced to inclined surfaces of holder of lower striker; riffled surfaces of said clamps are forced to two friction plates arranged on lateral surfaces of lower striker. Pins passing through openings of adjustment plates and entering openings of holder of lower striker are mounted in lower striker.
EFFECT: lowered cost of making tool, reduced time period for readjustment of it.
2 cl, 5 dwg
FIELD: plastic working of metal, possibly in forging shops of metallurgical and machine engineering plants for making wheels of automobiles and similar articles.
SUBSTANCE: tool includes die, punch, knocking out member with shaped portion, unit for stepped regulation of bottom thickness and height of cup. Said unit is in the form of apparatuses for changing length of punch and depth of die. In upper part of punch female type yoke with through stepped opening is mounted. In upper part of die there is seat whose diameter dimension corresponds to outer diameter of yoke. Depth of die is changed by means of apparatus in the form of flat ring arranged over shaped portion of knocking out member. Apparatus for changing length of punch is in the form of flat round gasket arranged inside yoke over punch. Punch has in its upper portion large-diameter step corresponding to diameter of large step of yoke opening.
EFFECT: possibility for producing by means of one tool semi-finished products of wheels with different combinations of width and thickness values.
3 cl, 3 dwg