Matrix for volumetric cold or warm forging
(57) Abstract:The inventive matrix for volumetric cold or warm forging has an intermediate split sleeve with a tapered cylindrical inner and outer surfaces. The wall thickness of the intermediate sleeve is made of at least 1/3 of the wall thickness of the insert. The height of the insert is made less than 1.5 times its diameter. On the intermediate sleeve is made of the edge radius. 1 C.p. f-crystals, 3 ill. The invention relates to the processing of metals by pressure and can be used in the design matrices for volumetric cold or warm forming.Known matrix for extrusion, consisting of a one-piece insert, split ring segments and clips. The external surface of the insert is made in the form of bilateral truncated cone with the smaller bases at the ends, split ring with mating conical surfaces. Conical surface have different lengths and different taper 
The disadvantage of this design is that it has a relatively low durability, in addition to the relatively high complexity of its manufacture. These shortcomings are due to the fact that:
first, traceski in the modern instrumental production grinding and subsequent operation fits the inner conical (cone) surface of the split ring and the outer surface of the insert are not technological;
secondly, it does not provide uniform tension when pairing mentioned conical surfaces, resulting in reduced durability.The closest technical solution is the matrix for volumetric cold or warm forging, consisting of the insertion of the intermediate split sleeve and body 
The disadvantage of this construction is that the outer surface of the intermediate sleeve is cylindrical, which surfaces form burrs on the case, and the uneven distribution of stresses from tension in height.The technical result achieved by the present invention is to reduce the consumption of expensive material, including solid alloy and high-speed steels, or with the same dimensions of the matrices in creating a more robust design in the simplification of the manufacture and Assembly of the tool, providing reusable conical sleeve and body.This is achieved by the fact that the matrix for cold or warm forging, consisting of the insertion of the intermediate split sleeve and the housing, intermediate the split sleeve is made with a conical outer and cylinder CLASS="ptx2">The height of the insert matrix is made less than 1.5 times its diameter. At the intermediate split sleeve made of the edge radius. This creates a more uniform distribution of stress perceived by the insert from the pressures that are created directly in the strain.Reducing the height of the insert allows you to create a more uniform stress distribution in box from pressures created directly in the strain that will contribute to the longevity of the insert.The height of the insert can be reduced to the amount determined by the formula:
where H is the height of the insert,
h1the height of the deformation zone,
In the height of reducing belt,
With the height of the output cone.In the proposed split sleeve no tangential stress, thereby reducing the total contact stress on the inner surface of the housing, which facilitates the conditions under which the contact stresses should not exceed the yield strength of the casing material. You can relieve the body, or create a box higher compressive stress, as well as significantly reduce the outer diameter, the GE and the preservation of the body material, or you can use a cheaper material for the housing while maintaining the tension and the outer diameter of the insert.When assembling the matrix, or when replacing the waste insert required her pressing or supressive from the case, and it can cause significant shear stress on the mating surfaces. The presence of the cone reduces the surface area of the friction surfaces or repressive and thereby decreases the probability of formation of burrs.At the intermediate split sleeve made of edge radius, which can reduce the formation of burrs.In Fig. 1 presents a General view of the matrix of Fig.2 box of Fig.3 - part intermediate split sleeve.The matrix includes a housing 1, an intermediate split sleeve 2, which consists of two parts, the insert 3 to 6. The outer surface of the sleeve 2 is made conical and the inner cylindrical. Box 4 is the reduction or squeezing.The Assembly of the matrix is as follows.Insert 3 6 invested in the first half of the intermediate split sleeve 2, a close second, then pressed into the housing 1 with tension.When mass praise stamping of various size parts. 1. Matrix for volumetric cold or warm forging, consisting of the insertion of the intermediate split sleeve and the housing, characterized in that the intermediate split sleeve is made with a tapered cylindrical inner and outer surfaces, and the wall thickness of the sleeve is not less than 1/3 of the wall thickness of the insert, the height of which is less than 1.5 times its diameter.2. The matrix p. 1, characterized in that the intermediate split sleeve made of the edge radius.
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