Stamp for volume deformation and cutting forgings
(57) Abstract:
The inventive stamp for volume deformation and cutting forgings contains the top plate with the punch, the bottom plate pusher composite matrix, a yoke rigidly connected with cut matrix, with the possibility of axial movement. Square matrix is made in the form of a ring with a cutting edge, forming together with the centering protrusion of the punch forming a stream with oblasnoi groove. The inner section forming matrix interacts with the cutting edge of the cut matrix with a drive reciprocating movement, made in the form of spring stepped screw and pusher. 1 Il. The invention relates to the processing of metals by pressure, in particular to the construction of dies for die forging and trimming details.We offer you stamp for the volume deformation and cutting Burr on the forgings relates to industrial equipment forging and stamping production and can be used to produce forgings screw or hydraulic presses with combining the operations of punching and trimming scrap per stroke of the press.A device for cutting Burr and Poo made with scrap and jumper on the stamping equipment and then you trim scrap and firmware on the equipment to trim.Famous stamp for the open die forging and trimming Burr [2], but it is intended only for parts with cylindrical conical part, which for trimming is performed technological annular collar.The closest technical solution to the invention is combined stamp for massive forming and trimming forgings containing the upper plate with the punch, the lower plate with forming the matrix, the node pruning in the form of drive trim die and stripper, with moulding-edged matrix is installed with the possibility of axial movement relative to the punch, and the drive is made in the form of spring-loaded relative to the bottom plate traverse with bevels on the sides and movably installed with the possibility of relative movement and interaction with these surfaces of the bar brackets with the Windows under the yoke, each bracket is pivotally connected with two spaced one above the other levers, the bottom plate is equipped with racks on the number of brackets, and the upper - arms, the arms with their free ends pivotally connected with the respective racks, IRNA connection with the stand is made with a longitudinal groove and a spring-loaded relative to the axis of the swivel, thus undercut matrix rigidly mounted on the cross beam [3].The disadvantages of this stamp are:the trim actuator of the matrix is complex to manufacture, contains many moving inertial structural elements in the form of brackets, levers and unreliable in operation due to wear in the hinge levers, especially under impact loads;
educated fin side cutting edge moulding and trim matrix occurs after the metal through the cutting edge and will inevitably lead to dullness and education of the radius at the last that will complicate the process of cutting Burr and reliable operation of the stamp.The purpose of the invention is to simplify the construction and improve the reliability of the stamps in the work.This is achieved by cutting the matrix is made in the form of a ring with a cutting edge, forming together with the centering protrusion of the punch forming a stream with oblasnoi groove, and the inner section forming matrix interacts with the cutting edge of the cut matrix with a drive reciprocating movement, made in the form of spring stepped screw and pusher.The invention is illustrated in the drawing, which is depicted on the left stamp, prodol cutting Burr and pushing forgings.The stamp consists of a bottom plate 1, on which are fixed the forming matrix, consisting of two sections 2 and 3, the plunger 4, is placed in the cavity of the bottom plate, the top plate 5, on which is fixed a forming punch, consisting of two sections 6 and 7. The outer section 7 installed in the traverse 8 and secured therein by the screw 9. Yoke is connected with the bottom plate 1 two guide columns 10 with the sleeve 11 and is spring-loaded in the direction of the punch of the springs 12. Axial movement of the bar 8 is limited by nuts 14 and washers 13. The inner section 3 of the molding matrix is connected with the bottom plate 1 by means of the stepped screws 16 and springs 15.Connector sections 6 and 7 forming punch made by fin clipping path, while the lower cavity of the outer section 6 of the molding punch at the same level with the face plane of the engravings of the Creek to the punch at the moment of deformation forgings.Stamp works as follows.The heated billet is mounted on the molding matrix (sections 2 and 3) through the hole in the section 6 of the punch. When the press slide down section 7 forming punch centering ledge In goes into the hole section 6, forming the upper molding stream with oblasnoi SS="ptx2">When the press slide up head plate 8 mounted on it by section 6 under the action of springs 12 rises in columns 10 to rest on the washers 13 and nuts 14. During the course of the ejector press (not shown) up the pusher 4, acting on the section of the matrix 3, pushes the forging with the Burr from forming a stream of the matrix and in the further course produces up trimming Burr on the forging, pushing it through the cutting belt p section 6. The forging is removed in the partition matrix 3 ticks.During the course of the ejector press down section 3 matrix under the action of springs 15 and a stepped screw 16 is lowered until they rest on the bottom plate 16, removing the Burr from the side surfaces. Burr is removed ticks in the gap between the head plate and the matrix.The proposed solution allows for a significant shock loads to improve the reliability of the stamp, and also to simplify the design by eliminating the inertia of structural elements in the form of brackets, levers, etc. STAMP FOR VOLUME DEFORMATION AND cutting FORGINGS, containing the top plate with the punch, the bottom plate pusher composite matrix, a yoke rigidly connected with cut matrix, with the possibility of axial movement, the guide protrusion of the punch forming a stream with oblasnoi groove, this inner section forming matrix interacts with the cutting edge of the cut matrix with a drive reciprocating movement, made in the form of spring stepped screw and pusher.
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
