Device for radial forging
(57) Abstract:Use: in the production of filter rod elements of the fuel pumps by the method of radial forging. Essence: the working profiles of the punches are displaced along the axis in a staggered manner relative to each other so that the steps between them in the upper and lower parts are twice larger than in the Central part. The length of each plug on the side of the working part is made of radius fillet, reducing the resistance to flow of metal in the radial direction. To increase the rigidity of the device punches made in the form of sectors with established between spring buffers. Increases the reliability and quality of products by increasing the rigidity of the device. 2 C.p. f-crystals, 7 Il. The invention relates to the field of metal forming, namely, radial forging of grooves, for example, in the production of filter rod elements of the fuel pumps.Known (see, for example, and.with. SU 1484427 A1) stamp for radial forming stars, which contains radially spaced punches and equipped with anti-squeak plate. The last time stamping tightly coupled through node of the known device is the fact that it allows you to process only the flat parts with a Central hole. Radial same stamping rolls on it is impossible.A device for radial forging, which is the prototype of the proposed solution (see, for example, and.with. SU 1484430 A1) where possible the extrusion grooves and slots on the parts like shafts.The device includes a separator with radial slots in which are placed punches, a glass with a tapered inner surface for movement along the axis of the housing and communicate with the punches. To improve the quality of products working edge punches are made of the profile.However, the known device also has significant drawbacks. It does not provide the possibility of radial extrusion grooves that are offset relative to each other along the length of the shaft with a pitch that varies in different sections.The sides of the working parts of punches made in the form of planes. In this regard, when the radial extrusion grooves and slots having a small circumferential steps, they do not provide the required accuracy Diametric dimensions along the length of the shaft.Prismatic form of punches, located in Sep the shafts and grooves or slots.The device has only one spring-loaded stop for the installation of the workpiece located in the fixed part of the device. This reduces the reliability of it and allows you to squeeze out the required profiles located only at one end of the workpiece; difficult extrusion profiles on the workpiece, changing in the process of extrusion of its length in the axial direction.To improve the quality of the products obtained, the reliability and the expansion of technological capabilities is made possible using the proposed device, comprising a housing, a separator with radial slots in which are placed punches with a work profile on the front of the glass with a tapered inner surface, having the ability to move along the axis, interacting with the punches and spring loaded centers for mounting the workpiece, while the working profiles of the punches are displaced along the axis of the casing in staggered relation to each other by an amount equal to 0.2 to 0.5 their length so that what steps between them in the upper and lower parts are twice larger than in the Central part, and on the lateral sides of the working portion along the length of each of the punches directly at the work profile is made radiosure.Punches in the plane perpendicular to the axis of the housing in the shape of sectors defined between the spring-loaded buffers.Spring loaded centers for mounting the workpiece, are located in the mobile and immobile parts.In Fig. 1 shows the device, the section of Fig.2 - scan the front of the working parts of punches; Fig.3 - section a-a in Fig.1; Fig.4 - section b-B of the working part punch on the length l2in Fig.2; Fig.5-7 schematic of radial extrusion of metal working parts of punches.Device for radial forming longitudinal grooves on the shafts consists of a body 1 mounted on the stationary bottom plate 2. The case contains a separator 3, in the radial grooves which are installed punches 4 on the front which made working profile. Each of the plungers away from the billet spring buffer 5, radially located in the separator. In the plane perpendicular to the axis of the housing, the punches are made in the form of sectors. This form ensures high rigidity of the device, which positively affects the precision of the parameters of the product. To improve centering and symmetry of the arrangement of the punches in sidewith secure the Cup 8, receiving the ability to move along the axis of the housing. The inner surface of the Cup has a conical surface which is in contact with the punches 4. The workpiece 9 is installed in two spring centers: the bottom 10 placed in a stationary housing 1 and the separator 3, and the top 11 placed in the movable upper plate 7 and the Cup 8. Top plate is attached to the press slide with the help of the shank 12. The upper and lower plates are connected between the guide columns, which in the context is not shown.The device operates as follows.In an unusable state Cup 8 together with the upper plate and the press slide is located in its upper position. Punches 4 released and under the force of spring buffers 5 are simultaneously removed from the workpiece 9, snuggling his occipital parts to the wall of the separator 3. Spring bottom 10 and top 11 centers unclenched.For extrusion grooves preparation is established between the punches on the spring loaded center 10. The press slide is reported stroke down. Together with the slider moved down top plate 7 and secured to it the Cup 8, the center 11 fixes the workpiece and the conical inner surface of the glass, contace spring buffers 6, located in the middle part of the punch 4, choose the possible gaps between them and place them evenly on the outer diameter of the workpiece. During extrusion grooves in the workpiece, the metal displaced by the punch, is how to increase the outer diameter and the elongation of the workpiece, so the centers 10 and 11 is made by means of springs floating.When reverse motion of the slide glass 8 with the upper plate upward, freeing the punches. While the buffers 5 synchronously take away all the punches from the workpiece 9. At the same time buffers 6 pushing punches to the side of each other, creating the possibility of free movement and reduce friction on their side contact surfaces.For radial extrusion grooves that are offset relative to each other along the axis of the workpiece, the working profiles of punches length l is displaced along the axis of the casing in staggered relation to each other by the value of l1=(0,6-0,5)l. As a result, the steps between them in the upper and lower parts of the device are twice the size 2S than in its Central part with a length l2, where the step size is equal to S.When the radial extrusion grooves lots of punches on the length l1, bocim profiles of punches. As a result, the metal flows in radial and tangential directions. This leads to an increase of the diameter of the workpiece from the original d to the diameter d1and to the lengthening of the original length of the workpiece.During extrusion grooves of the Central areas of punches on the length l2when they are half steps between 2S a, the metal flow occurs in two directions - radial and tangential. However, unlike other areas along the length l1on the Central part of the l2the metal to a greater extent flows in the direction of increasing the length of the workpiece. The increase in diameter of the workpiece at this site occurs to a much lesser extent: from the original d to d2. This is due to cramped conditions of the metal flow in the radial direction due to close between him work profiles of punches. Metal flow in the radial direction as would be hampered by the punches, locked them.In the result, the value of the outer diameters of the product after extrusion grooves will be different at sites l1and l2. On plots of l1the outer diameter of the extruded product will be greater than at site l2dTo address this shortcoming on the side of the working part on the height of each of the punches directly at the work profile is made of radius fillet depth of 0.05-0.2 mm, and the radius of microsec selected from the condition R= (1-5)N, where H is the height of the working profile of the punch. The presence of radius microsec reduces resistance and facilitates radial metal flow on the sections of l2punches, as if revealing them.In the result, the outer diameter and height of the extruded profile products on sites l1and l2be almost the same d1=d2and h1=h2. This increases the accuracy and quality of the extruded product.Thus, unlike known, the proposed device provides:
- the expansion of technological capabilities by addressing the problem of radial extrusion grooves that are offset relative to each other with a pitch varying along the length of the shaft;
- improvement of the accuracy of manufacture of the product on the outer diameter and the height of the extruded profile;
- simultaneous supply and disposition of all punches and even placing them on the outer diameter of the workpiece, which increases the reliability of the device and provide the re with their movements, that increases their durability and reliability. 1. Device for radial forming grooves on the shafts, comprising a housing, a separator with radial grooves therein, a punch with a working profile on the working side, a glass with a tapered inner surface, mounted for movement along the axis of and interaction with the punches, and spring loaded centres for installation of billet shaft, characterized in that the working profiles of punches executed displaced along the axis of the housing in a staggered manner relative to each other by the amount of 0.2-0.5 their length to form steps between them in the upper and lower housing parts, in excess of half steps in the Central part, and on the lateral sides of the working portion along the length of each of the punches directly for his work profile made fillet depth of 0.05-0.20 mm and a radius selected from the condition R= (1-5)N, where H is the height of the working profile of the punch.2. The device under item 1, characterized in that the punches in the plane perpendicular to the axis of the housing, made in the form of sectors with established between spring buffers.3. The device under item 1, characterized in that the spring loaded centres are under
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
FIELD: plastic working of metals, possibly manufacture of internal combustion connecting rod by closed forming.
SUBSTANCE: method comprises steps of preparing blank with two thickened end portions and one thickened portion in mean zone; deforming prepared blank in cavity of die set while making openings in thickened end portions at displacing blank metal; shaping mean portion of connecting rod and after-forming its heads. Volume of thickened portion in mean zone of blank exceeds volume of mean portion of article by value equal to half of total metal volume of blank displaced at making said openings. Gravity center of thickened portion of mean zone is spaced from axes of openings by distance inversely proportional to metal volumes displaced at forming respective openings.
EFFECT: improved quality of article.
2 dwg, 1 ex