Die for die forging
(57) Abstract:The invention relates to the field of metal forming, in particular to designs of dies for die forging of hollow shaped products, mainly automobile wheels. The technical result is to simplify the design of the stamp, increasing its resource and performance, ensuring the stability of the geometrical sizes of forgings by eliminating the gaps in the places of the connector parts of the stamp. The essence of the invention: in the proposed stamp for massive forming on the inner surface of the power cage is made T-shaped guides, and each cell of the matrix is made a groove for reciprocating movement of the sections in the guide clip, in addition, the stamp is provided with a vertical clamping bars for holding the sections of the matrix in close position when the deformation of the workpiece that is fixed in the upper half of the stamp and the matrix consists of four sections. 1 C.p. f-crystals, 1 Il. The invention relates to the field of metal forming, in particular to designs of dies for die forging of hollow shaped products, mainly automobile wheels.Reinforcement of the selected wheels with flanges (RF patent 2045369, CL 21 To 1/28, publ. 1995, bull. 28). The stamp contains the upper half and punch with the working engraving and the lower half of the split matrix and punch, equipped with a cone plate with a working surface, an engraving of which is the response engraving in contact with her decorated deepest part of the product.The disadvantages of this stamp is complicated to manufacture due to the high accuracy requirements of the integration of the parts of the stamp, low surface quality forgings, as well as the difficulty of extracting the finished product with engraving plates.Closest to the claimed invention to the technical essence and the achieved result is a stamp for forming processes containing power cage, landing Jack where the matrix consisting of two sections, the punch and the ejector with the plate in contact with the matrix. The stamp is provided with rods to move the sections of the matrix perpendicular to the longitudinal axis of the punch and the ejector plate is placed with the surface coverage sections of the matrix in close their position and without freedom of movement when filled engraving and extracted the punch (see RF patent 2057613, CL 21 J 13/02, publ. 10.04.96,, bull. 10) prototype.Not the m of gaps in the field connector of the matrix, which leads to the flowing of metal in the gap, changing the geometry of the stamping in the diametrical direction, and the low productivity of the process, because it takes time for the opening and closing of the matrix by means of hydraulic rams, the complexity of the design of the stamp through the use of hydraulic cylinders and apparatus of the latter.The problem to which this invention is directed, is to simplify the design of the stamp, resources of its operation and performance, the stability of the geometrical sizes of forgings due to the elimination of gaps in the field connector of the matrix.The problem is solved in that the stamp for massive forming, contains the punch, power ferrule, in which is placed a split sectional matrix, the ejector with the plate, on the inner surface of the power cage is made T-shaped guides, and each cell of the matrix is made a groove for reciprocating movement of the sections in the guide clip, in addition, the stamp is provided with a vertical clamping rods pinned to the top half of the stamp, to hold the sections of the matrix in close position when the deformation of the workpiece, and the matrix is composed iocesan the proposed stamp in the final stage of deformation of the workpiece, and right at the moment of ejection of the finished product of the stamp.The stamp contains the upper support plate 1, the clip 14 located therein by the punch 2 and the four vertical clamping bars 7, the bottom plate 3, which has the power holder 4 with a tapered socket. In the socket holder 4 is split four matrix 5, the contact surface with the yoke which is made conical. On the surface of each cell of the matrix 5 is made a groove for reciprocating movement along the T-shaped guide rails 9, bolted to the inner surface of the conical socket holder 4. Boarding socket holder 4 and the surface sections of the matrix 5 in contact with the yoke, the conical extension in the direction of the punch 2. Reciprocating movement of the sections of the matrix 5 are for the account code of the lower ejector 6, placed in the plate 3. The upper part of the stamp contains the adapter plate 11 located therein washer 12. Press power on the stamp is transferred through the intermediate plunger 13.Stamp works as follows.Heated source of the workpiece 8 is installed in the engraving of the stamp formed closed sections of the matrix 5 and Vytas section of the matrix 5 and transfer the force from the top of the press RAM, securely holding the matrix in close position during the entire cycle of deformation of the workpiece. In the next moment the movement of the bar press down the plunger 2 is embedded in the workpiece 8 and begins the process of deformation. System: the pusher 13, the washer 12 and the clamping rod 7 compensate for the gaps in the field of connector sections of the matrix 5 and hold the latter in the lower working position before the end of the deformation process.At the end of the process of deformation of the upper half of the stamp is lifted to the original position. The lower ejector 6 raises the finished stamping and the matrix up. When the course up each section of the matrix begins to move along its guide 9 at an angle to the vertical axis of the stamp and sections diverge in the radial direction, forming the space required to remove the stamping of the engraving of the stamp. Ready stamping can be easily recovered. In the engraving of the stamp placed a new piece. Then the ejector 6 is lowered down, the partition matrix 5 slide along the guides 9 and closed. The stamp is ready for the next cycle of stamping.The proposed stamp was produced and tested in industrial conditions-forging shop of the company-applicant, if the stamp is AZ", "UAZ" and other good results.The proposed stamp for forming processes in comparison with the prototype has a simple structure, in particular, due to the exclusion of the cylinders, which reduces the number of repairs and the cost of them and increases the life of the stamp. Clamping bars provide secure interlocking of the sections of the matrix at the time of deformation of the workpiece, allowing you to get stamping with a stable geometrical dimensions. Improves the performance of the stamping process due to the quick connector sections of the matrix after deformation and reduce the complexity of the extraction of the finished product from the stamp. 1. Stamp for massive forming, contains the punch, power clip, which has a sectional matrix, the ejector with a stove, characterized in that on the inner surface of the power cage is made T-shaped guides, and each cell of the matrix is made a groove for reciprocating movement of the sections in the guide clip, in addition, the stamp is provided with a vertical clamping rods pinned to the top half of the stamp, to hold the sections of the matrix in close position when the deformation of the workpiece.2. Stamp on p. 1,
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
FIELD: metallurgy; metal plastic working.
SUBSTANCE: invention can be used in form forging shops of metallurgical and machine-building plant in manufacture of vehicle wheels and like articles. Proposed tool contains die and punch holder with punch and knock-out with shaped part movable relative to die. Punch is enclosed by replaceable round holder with support flat and support surface. Die is provided with socket in upper part whose diameter corresponds to outer diameter of holder, and with support flat. Holder is installed for longitudinal displacement and engagement by its support flat and support surface with support flat of die and with punch holder, respectively. Shaped part of knock-out is made replaceable to provide possibility of making wheels of different type-sizes using one tool.
EFFECT: enlarged operating capabilities.
2 cl, 2 dwg
FIELD: plastic metal working with use of intensive plastic deformation, namely manufacture of nano-crystalline materials with improved degree of mechanical properties.
SUBSTANCE: die set includes slider and plate restricting inlet duct; stationary stop closing inlet duct and restricting together with plate outlet duct; ram and member for knocking out blank. Said member is joined with motion drive unit and it is mounted with possibility of introducing into additional through duct formed in slider. According to first variant of invention at initial position of slider its through duct is arranged in front of outlet duct. Slider may be shifter before starting pressing process by value exceeding size of through duct. According to second variant of invention through duct of slider is arranged in front of outlet duct in lower limit position of slider. Said cone-shape through duct of slider is closed by means of plug pressed-in to it.
EFFECT: improved design providing possibility for extracting last blank out of outlet duct before starting pressing of next lot of blanks.
2 cl, 5 dwg