Way of reducing speed diversified shafts
(57) Abstract:The method can be used to obtain speed diversified shafts. The workpiece in the form of a shaft is fixed in the mounting bracket and with the direct course matrix carry out the reduction of the first stage shaft. The reduction of the second stage shaft produce a matrix of a different profile at the beginning of the return stroke by the amount is less than the reverse. 3 Il. The invention relates to the field of materials processing pressure and can be used to obtain speed diversified shafts.A known way of reducing speed multi shaft, comprising the sequential processing in several cycles: the workpiece, clamp workpiece, reducing her through the matrix of the corresponding profile when the direct course and the allocation matrix to its original position in the reverse course. The number of such cycles is equal to the number of feet reduction (Cold forging: a Handbook. Ed., A. Navrotsky. M.: Mashinostroenie, 1973, S. 399, 400).However, with this method the energy and opportunities for reverse not used, which increases the manufacturing costs of parts and reduces productivity the fast way (ed. mon. SU N 1459809 (B 21 J 13/02, 1989), including the workpiece, clamp workpiece, reducing the first stage of preparation for the direct course and the reduction of the second stage in backward motion.However, in this method, the profile of the workpiece is obtained the same along the entire length of the return stroke.The problem to which the invention is directed, is to expand the possibilities for changing the shape and range speed diversified shafts.The problem is solved due to the fact that in the proposed method of reducing speed multi shaft, comprising a workpiece in the form of a shaft, pinning her, the reduction of the first stage shaft matrix one profile with the direct course and the reduction of the second stage shaft matrix of a different profile in a reverse course, the reduction of the second step are performed at the beginning of the return stroke to a value less than the reverse.To implement this method, a device for regulating the speed of a multidisciplinary shafts, comprising a frame, clamping device, the focus, the drive, the tool for the reduction made in the form of clips matrices for the reduction of the first stage with the direct course to enable, the switch with the possibility of fixed positions along and around the axis of the handle. Moreover, the switch acts on the levers of the working elements of the matrix in the reverse course on a given program. Design and installation methods for the switch can be very diverse, for example, in the form of a rim, blocks, can be attached to the brackets separate elements, in the form of leaf inclusions, etc.The reduction of the second stage shaft produce part-length reverse in order to get at the shaft rotation profiles from the matrices of the first and second stages, the reduction in the reverse of course you can stop at any place depending on the location of the switch along the axis of the shaft. This is achieved by expanding the range of step diversified shafts.To ensure disconnection of the working elements of the matrix of the second stage device includes a switch, which creates the possibility of obtaining different profiles on the shaft. Change the switch position along the axis provides the obtaining of the desired profile section of the shaft at a predetermined length of each of the elements of the matrix reverse. Change the switch position around the axis of the handle obespecivaet">The method is carried out on the device, shown in Fig. 1 to 3. In Fig. 1 shows a device, a General view of Fig. 2 - design tool for the implementation of the proposed method, his work with the direct course; Fig. 3 - the same, in reverse.Device for reducing speed diversified shafts comprises a frame 1, on which the clamping device 2, designed for rigid fixing of the workpiece in the form of a shaft in the process of its reduction tool 3 with the actuator 2, made for example in the form of a hydraulic cylinder. Tool 3 for reducing includes a holder 5, in which is placed the body of the matrix 6 with a set of work items 7 and axes 15 and the body of the matrix 10, also made from a set of working elements 8 located in the same plane symmetrically to the axis of the matrix 10. Each of the working elements 8 is mounted on a shaft 9 can be rotated to lock into the housing 10 and provided with a lever 11, which at the end of the forward stroke of the tool 3 cooperates with an adjustable stop 12, mounted on the frame 1, and at reverse motion of the tool 3 with the switch 14, is also fixed on the frame 1.The device operates as follows.Before nachalom.otlichno the length of the first pressure shaft speed, derived from the workpiece 13 in the form of a shaft rigidly mounted in the mounting bracket 2, while the adjustable 12 establish and fix on the frame 1 so that the distance between it and the lever 11 work items 8 matrix 10 match the length of the processing in the direct course of the tool 3. With the direct course of the tool 3 by means of the actuator 4, the work items 7 matrix 6 under the influence of effort reduction rotated to the stop in the housing 6, thus forming the desired profile of the first stage, and reduces the profile and work items 8 matrix 10 slide on it and in the processing of the workpiece 13 with the direct course do not participate.At the end of the forward stroke of the tool 3 in the result of the interaction of the levers 11 work items 8 matrix 10 with an adjustable stop 12 is rotating work items 8 around the axis 9 and a preliminary implementation work item 8 in the workpiece material 13. At the same time due to the reverse drive 4 tool 3 begins to move in the opposite direction. When reverse motion of the tool 3 work items 8 matrix 10 under the influence of efforts of reducing ends in the case of the matrix 10 and closed, thereby forming the desired profile and the efficiency of the deviation of the axes 15 and therefore slide on the workpiece 13.When reverse motion of the tool 3 at the specified location levers 11 work items 8 interact with the switch 14 and under the influence of forces turn on the axes 9 and, thus, out of the treatment area. The reduction in reverse motion stops. The remainder of the return stroke of the tool 3 passes without reduction because the elements of the matrix 6 slide on the outer surface of the shaft, and the elements of the matrix 10 is removed from the treatment area. This allows for reverse course to get the alternation of different profiles at the second stage shaft. Way of reducing speed multi shaft, comprising a workpiece in the form of a shaft, pinning her, the reduction of the first stage shaft matrix one profile with the direct course and the reduction of the second stage shaft matrix of a different profile at flybacks, characterized in that the reduction of the second stage shaft is produced at the beginning of the return stroke by the amount is less than the reverse.
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