Device for forging hollow workpieces
(57) Abstract:The inventive device includes a circular punch, matrix with relief work surface and frame. Matrix with the relief side of the working surface is made sectional sofas with radial holes for the formation of appendages on the forging. Holes are made in the sections of the matrix and have an expanding cross-section and slope towards the outer surface of the matrix. The mandrel is rigidly mounted inside the annular punch that no gap is moving through the matrix. When reverse motion of the punch forgings hold in the matrix radial technological projections. In the process of Stripping the forging of a matrix of technological tabs are cut off cutting edges of radial holes of the matrix. 3 C. p. F.-ly, 4 Il. The invention relates to the processing of metals by pressure, in particular the production of hollow forgings with protrusions and depressions over the entire height of the side surfaces, and can be used in the production of parts with external and internal gearing in various industries.The closest in technical essence to izobreteniya is a device for manufacturing hollow parts with projections and depressions kreplenie them accordingly annular punch and a matrix with a relief surface, and the holster.The technical result of the invention is to reduce the complexity by reducing it at the receiver forgings and manufacture of the device and the expansion of technological capabilities by increasing the size of the obtained forgings. Solved the technical problem of the retention of forgings on the outer surface when removing them from the mandrel and facilitate the acquisition of complex internal profile matrix by freer access of the tool to the workpiece surfaces.The technical result is achieved in that the device containing the upper movable and lower fixed plates attached to them, respectively, the annular punch and matrix with relief work surface and the mandrel, provided with a means of fixing billet, made in the form of radially arranged in the wall of the matrix at a distance from its upper end, exceeding the working stroke of the punch, holes with a cutting edge on the inner surface of the matrix and is inclined in the direction of its outer surface, and the matrix is made sectional, and the mandrel is rigidly mounted on the top plate inside the ring punch.The device is characterized in that the angle is ciaasa in the direction of the outside surface of the die section, radial through holes are located in the tabs of the relief of the working surface of the matrix.In Fig. 1 shows a top view of the stamp of Fig. 2 - the lower part of the stamp plan; Fig. 3 is an embodiment of the matrix of Fig. 4 - part of the matrix in Fig. 3, a plan.The stamp consists of the upper 1 and lower 2 plates, punch 3, the mandrel 4, the matrix 5 and the ejector 6. For coaxial movement of the upper part relative to the lower stamp has a guide system of guides and speakers.The matrix has an inner side relief surface, on which is arranged the outer surface of the forgings with bumps and hollows. The matrix is made sectional: one section on depression or protrusion of the product during major depressions and protrusions or one section at a few depressions and projections if they are small. Section matrices have a radial through hole with a cutting edge on the inner surface, which increases towards the outer surface and inclined towards the outer surface. Openings are provided for flowing metal of the workpiece at a Deposit at the time of spreading it in the peripheral direction and education on the surface of the forging process TrustKeeper reliable spontaneous descent of the separated processes.The smallest diameter of the holes and their number depend on the extent of delay forgings when the withdrawal of the punch and mandrel, the height of the holes from the height of the workpiece and the stroke of the punch, i.e. holes provide processes in the forging. The matrix is attached to the bottom plate by pins and screws or bolts.In Fig. 3 shows a variant implementation of large matrices to obtain a high forgings. Section of the matrix is performed stepwise. At the bottom of the wide steps are pins and screws or bolts, the upper part of the matrix is encircled with a small height bandage 7 - ring manufactured by rolling.In Fig. 4 section of the matrix is performed to obtain hollow forgings. In the projection section includes the previously mentioned radial through hole. The contours of the sections of the matrix produced by the copier. When applying dabaka for receiving cavities of the matrix preferably manufacturing Assembly, i.e., during processing section rigidly fastened. Perhaps receiving trough of the matrix in one section, but in this case, the radial holes for technological processes receive the Assembly of the two sections.The punch has such outer side relief surface that it comes in matiana inside punch and coaxially him. The mandrel is placed at the bottom plane of the punch by an amount equal to the height of the matrix. In the manufacture of products with a smooth inner contour of the mandrel is smooth. In the manufacture of products with the protrusions and depressions on the inner surface of the mandrel has an embossed surface. The mandrel with the shank can be attached to the end face of the punch on the thread. Then the punch is solid, and the frame will be shorter.The ejector has a stepped inner cavity. The first step is to center the mandrel, the second as the release for the passage of the mandrel upon further downward movement.Stamp works as follows. In the open position, the lower end of the mandrel is separated from the upper surface of the matrix by a distance equal to the height of the workpiece. Billet having an outer diameter equal to the diameter of the projections of the matrix, and an inner diameter equal to the diameter of the mandrel, if it is smooth, or the diameter of the projections, if the mandrel relief, is installed inside the matrix on the bottom plate. During hot stamping dimensions of the workpiece are assigned based on expansion when heated. The bottom plate is a lower plate for precipitation. The upper plate for precipitation is the punch.During the precipitation of the metal outer lateral surface of the workpiece flows in the radial holes of the matrix with the formation of technological processes. The lower end of the punch has a cavity, and the piston in the initial position is below the mirror on the bottom plate. Thus while precipitation is the flowing of metal into the axial cavity. So get products with hubs of smaller diameter than the canvas.Flat products are produced by a flat punch, at the position of the ejector flush with mirror on the bottom plate. If the punch has a ledge at the end and the piston in the initial position above the mirror of the bottom plate, receive product with a recess at the ends. When the upward movement of the movable part of the stamp forging remains in the matrix, pausing in her technological processes. This ensures eat forgings from the mandrel and releasing the mechanical cavity IPRI this moves up and forgings. Technological processes are cut and the holes of the matrix roll down the outside of the stamp. The holes in the matrix, which has a diameter greater than the diameter of the Appendix and the angle of inclination ensure smooth release of the matrix from the shoots. Thus forged ejected from the matrix. Again set the workpiece, the process repeats.The use of the device allows to increase the range of the products obtained, to simplify the design and manufacturing of the stamp, to increase the reliability of the process, reduce the number of machining and metal consumption. 1. DEVICE FOR FORGING HOLLOW WORKPIECES, comprising upper movable and lower fixed plates attached to them, respectively, the annular punch and matrix with relief work surface and the mandrel, characterized in that it is provided with a means of fixing billet, made in the form of radially arranged in the wall of the matrix at a distance of its upper end is greater than the stroke of the punch, holes with a cutting edge on the inner surface of the matrix and is inclined in the direction of its outer surface, and the matrix is made sectional, and the mandrel is rigidly mounted on the radial through holes 20o.3. The device according to PP. 1 and 2, characterized in that the radial through holes made with increasing towards the outer surface of the matrix section.4. The device according to PP. 1 and 3, characterized in that the radial through holes are located in the tabs of the relief of the working surface of the die.
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