Tool for radial forging
(57) Abstract:The inventive tool for radial forging contains two pairs of forging dies. Boiky boards are and calibrating areas. The lead-in areas Boykov made of a width increasing in the direction of the calibrating stations. The width of the lead-in sections in place mates with calibration plots is from 0.3 to 1.0 the width of the gage section. The lead-in areas can take the form of a trapezoid, the smaller base of which is offset relative to the longitudinal plane of symmetry of the heads. 5 C. p. F.-ly, 7 Il. The invention relates to the processing of metals by pressure, in particular to tools for radial forging machines.A well-known tool for radial forging machines, containing two pairs located in mutually perpendicular planes Boykov, having lead-in and calibrating parts 
The tool of this design is widely used in forging on radial forging machines of round and square sections. However, the use of such a tool cannot provide satisfactory quality metal.Also known tool for radial forging machines, containing two pairs located the TCI variable width and gage sections, side and the support surface 
However, forging such a tool does not provide an intensive study of the metal in the entire volume of the workpiece, which negatively affects the quality of the products.The technical result to be obtained by the use of the invention is to improve the quality of the products due to more intensive study of the metal in the amount of forgings.The technical result is ensured by the fact that in the known tool for radial forging, containing two pairs located in mutually perpendicular planes of the heads having a working surface, forming a lead-in areas of variable width and gage sections, side and a support surface, according to the invention the starting areas of each striker has a width increasing in the direction of the calibrating stations.The technical result is also the fact that in the known tool for radial forging of lead-in areas known to have a trapezoid shape, the large base of which is adjacent to the gage sites.In addition, the technical result is ensured by the fact that the smaller base of the lead-in areas Boykov, having the form of a trapezoid, offset otnositeljnoyj the result is the fact, what is the lateral surface of the lead-in areas Boykov made concave, and the surface described by hyperbolic curves.In addition, the technical result is ensured by the fact that the starting areas are made of different widths with increasing width from the firing pin to the firing in the circumferential direction.In addition, the technical result is ensured by the fact that the width of the lead-in area of each striker in connection with the calibration plot is from 0.3 to 1.0 the width of the calibration plot is brisk.In Fig. 1 shows a tool for radial forging Assembly of Fig. 2 is a view in plan on the working surface of the striker of Fig. 3 is a view in plan on the working surface of the striker, whose lead-in areas have the shape of a trapezoid, and large grounds adjacent to the gage section; Fig. 4 tool for radial forging, which has smaller grounds of lead-in areas Boykov, having the form of a trapezoid, which is offset relative to the longitudinal plane of symmetry of the heads of the district; and Fig. 5 is a view in plan on the working surface of the striker, whose side surfaces of the heads are made concave and described hyperbolic curves of Fig. 6 tool for radial forging, which
cerned segodnyashnie of the workpiece.Tool for radial forging consists of two pairs of strikers 1 installed on radial forging machines (not shown) with pairwise displacements (Fig. 1).Each head has a working surface, forming a take-up reel 2 and calibrating 3 sections, and the side surface 4 (Fig. 2 and 3).All strikers input sections have a variable width which increases in the direction of the gage (Fig. 2).The lead-in areas of the heads can be made in the form of trapezes, large grounds which are adjacent to the gage sections (Fig. 3).When the compression of the workpiece by the tool of this design lead-in parts of its narrow part embedded in the body of the workpiece, and then by passing it through a forging unit, the depth of penetration decreases and due to the action of the side surfaces creates a tangential flow of the metal, which improves its development.The tool for radial forging offset with smaller bases lead-in sections of the heads relative to the longitudinal axis of the plane of symmetry of the heads (Fig. 4), and also with increase in width from the firing pin to the firing in the circumferential direction (Fig. 6), allows you to create deformable harvesting more the>/P>The width of the lead-in area of each striker in connection with the calibration plot can be from 0.3 to 1.0 the width of the calibration plot is brisk.When the widths of the lead-in area <0,3 width calibration area on the surface of the forgings possible Sakova, and if the width of the lead-in area is greater than width calibration plot is not achieved significant improvement in the study of metal.Perform lateral surfaces of the heads of the concave (Fig. 5) provides a more intensive study of the metal due to the introduction of lead-in areas in the body of the workpiece.Forging tool of the proposed design is carried out in the usual way. Compression is controlled by four strikers at the same time, in the intervals between the reductions is a longitudinal feed with simultaneous rotation of the workpiece about its axis. The deformation occurs so that the lead-in sections of the heads of the workpiece cross-section is circular with protrusions (Fig. 7), during each compression creates additional threads displacement of metal. By passing the workpiece through calibrating the areas of the heads of the protrusions salvavita and its cross section is converted into a round.IKI metal in the cross section of the forging. 1. TOOL FOR RADIAL FORGING, containing two pairs located in mutually perpendicular planes of the heads having a working surface, forming a lead-in areas of variable width and gage sections, the side and the supporting surface , characterized in that the starting areas of each striker has a width increasing in the direction of the calibrating stations.2. The instrument under item 1, characterized in that the lead-in areas Boykov have the shape of a trapezoid, the large base of which is adjacent to the gage sites.3. Tool for PP.1 and 2, characterized in that the lower base of the lead-in areas Boykov, having the form of a trapezoid, which is offset relative to the longitudinal plane of symmetry of the heads in the circumferential direction from the firing pin to the firing.4. The instrument under item 1, characterized in that the lateral surface of the lead-in areas Boykov made concave, while these surfaces are described by hyperbolic curves.5. Tool for PP.1 to 4, characterized in that the lead-in areas of the heads are made of different widths with increasing width from the firing pin to the firing in the circumferential direction.6. Tool for PP. 1 to 5, characterized in that the width of the lead-in area every
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