Method for electropulse and power sphere dynamic plasticisation of pipeline billets metal
FIELD: technological processes.
SUBSTANCE: invention is related to the field of metal plastic working and may be used in manufacturing of multiplane pipelines for pneumatic hydraulic systems of aggregates and machines. Pipe billet is exposed to initial impact pulses of sphere dynamic action. Pulses are applied to diametrically installed sections of external surface of billet along curve having shape of logarithmic spiral of Ya.Bernoulli. Moreover, deformation extent is provided on every side of billet along its whole length, which is identified from the given expression. Then series of electric current pulses are applied to billet with current density in pulse Q=(1.2…2.0) 104. Duration of electric current pulses action τ=(0.3…0.4) T, where: T is duration of action at pipe billet with initial impact pulses. Then secondary impact pulses of sphere dynamic action are applied on external surface of pipe billet. Value of deformation extent from every side of pipe billet from secondary impact pulses is identified from given expression.
EFFECT: provision of generation of regulated field of compressive stresses in metal purified from dislocations, which guarantees preservation of geometry of pipelines made of billets.
2 dwg, 1 ex
The invention relates to the field of materials processing pressure, and in particular to methods and devices for cold plastic deformation and electropulse treatment of metallic workpieces before deformation, and can be used in the manufacture of Omni-directional piping for pneumatic-hydraulic systems of units and machines in the automotive industry, aircraft construction, fuel and energy, medicine, food industry, shipbuilding and rocket.
There is a method of electro-plasticization of the metal billet and its subsequent deformation [Magazine "die Forging production", 1985, No.1, p.29-31].
The disadvantages of this method are:
- significant energy consumption of the process of plasticization of the metal of the workpiece due to the need for guidance on her series of pulses of electric current of high current density in the stream (~108 a/m2);
- the inability in the process of deformation of the workpiece to implement the wave nature of plastic deformation in the form of plastic rotors (vortices), penetrating to nanorover (10-9m) of the metal workpiece and generates a regulated field compressive stresses forming in the metal pipe after the flexible pushing so-called "artificial intelligence".
The present invention I have is the development of the way, which allows early processing of the workpiece to clear the metal from the previously made dislocations, and then to ensure the penetration of plastic rotors (vortices) in nanorover
(10-9m) of the metal billet and the formation of arrays of metal fibrous structure of the spiral geometry with "artificial intelligence".
To solve the problem the way electro and power svetodinamichesky plasticization of metal billets pipelines includes the processing of steel billets overlaid initial shock pulses fertilityscore impact, which is applied to diametrically located parts of the outer surface of the billet along the curve having the shape of a logarithmic spiral Bernoulli to provide the degree of deformation on each side of the billet along its entire length, which is determined from the following equation:
where: εsfodthe degree of deformation of billets on each side, %;
σtthe yield strength of the material of the tubular workpiece, %,
then to pipe the workpiece apply the series of pulses of electric current with a current density in the momentum Q=(1,2...2,0)104(A/m2) when duration of exposure pulses of electric current, which is determined from abusage expression:
where: τ is the exposure duration for tubular workpiece pulses of electric current;
T is the exposure duration for tubular workpiece initial shock pulses fertilityscore effects,,
then on the outer surface of the tubular workpiece impose secondary shock impulses fertilityscore effects that make the curve referred to the original fertilityscore impact, ensuring the degree of deformation on each side of the billet along its entire length, which is determined from the expression:
where: εsfodthe degree of deformation of billets on each side from the secondary shock pulses fertilityscore effects, %.
It was found that the overlay on the workpiece initial shock pulses fertilityscore impact, ensuring the degree of deformation on each side of the billet is less than 0.4, σtdoes not facilitate the creation of regulated morphology of the spiral arrangement of the structural hubs dislocations in the array structure of the metal of the workpiece, while the excess referred to the degree of deformation of the values 0,5σtdramatically increases the likelihood of uncontrolled formation of new dislocations.
The Annex to zagotovleniia pulses of electric current with a current density per pulse is less than 1.2·10 4A/m2does not provide the regulated movement of dislocations, and the current density of more than 2.0·104A/m2leads to uncontrolled heating of the metal and the destruction of established structural hubs dislocation.
The duration of the electric pulse for tubular workpiece less than 0.3 T does not ensure the required degree of purification of its metal against dislocation, and the duration of more than 0.4 T increases the likelihood of uncontrolled heating of metal billets. Overlay for pipe billet secondary shock pulses fertilityscore impact with the degree of deformation with each side less than 0.1 εsfoddoes not ensure the formation of a given regulated field siaosi stresses in the metal tube stock, and the excess of the stated degree of strain value of 0.2 εsfodincreases the probability of discontinuity of the metal billet in the subsequent bending of the pipeline.
Method and electro power svetodinamichesky plasticization metal blanks pipelines is illustrated by drawings, where:
figure 1 - schematic diagram of the processing of steel billets overlaid shock pulses fertilityscore effects;
figure 2 shows a schematic diagram of electro-plasticization met is the lia blanks pipelines.
The method is as follows.
The workpiece 11 is placed between the strikers 9 and 10 fertilityscore shock-pulse device (reverser, figure 1) in the form of platters 3 and 4, connected by struts 5 hosting platforms 6, 7 and springs 8 on racks 5 between them. Produce initial shock-pulse processing of the workpiece 11 along its entire length with drive 1 and Cam 2. In the structure of the metal tube workpiece 11 are formed structural spiral concentrators previously made dislocations based on the principles of rotary symmetry of the Weyl. Then, the workpiece 11 is placed in between the current collectors 13 and 14 (figure 2), the United tokovodov 12 and 15 with a generator of electric pulses 22 and produce electro-processing of the workpiece 11 by a series of electric pulses of low current density in the stream, thereby reglamentirovannyj moving previously concentrated dislocation structure of the metal billet in a specific area, which is then removed.
After this, the workpiece 11 is again placed between the strikers 9 and 10 fertilityscore shock-pulse device and produce secondary processing of the shock pulses along the entire length, forming a metal workpiece 11 is regulated field of compressive stresses with the help of plastic rotors (vortices), penetrating to nanorover handling aemula metal and giving it the properties of the so-called "artificial intelligence", which manifests itself in the form of properties of metal products alone (synergistic) to make decisions in conditions close to critical.
An example of the method.
Produced plasticization of metal samples billets using blocks and electro svetodinamichesky processing when rotating and reciprocating movement of the workpiece in the press mod. DB 2432 (P=160 kN) with the following parameters:
- material billet items 121810;
- the diameter of the round billet 10 mm;
the wall thickness of tubular workpieces 2.0 mm;
the degree of deformation on each side of the tubular workpiece during processing of the initial shock pulses fertilityscore effects;
the density of the electric current pulse in the electric impulse treatment 1.7 a/m2;
- duration of exposure pulses of electric current 25 C;
- processing the initial shock pulses fertilityscore impact 80;
the degree of deformation on each side of the tubular workpiece during processing of the secondary shock pulses fertilityscore impact 19.
Conducted plasticization of metal samples billets allowed:
- to increase the degree of grinding of the grain of the workpiece material at 35 - 40%;
- to improve the article the stump coagulation (rounding hardening nitride phases) by 40-50%;
- to increase the volume fraction vibration crystallographic texture components at 55-60%;
- reduce waste by bumps in the subsequent bending of the samples on the machine TGPS-3 level 27-30%.
Method and electro power svetodinamichesky plasticization of metal billets pipelines, including the processing of steel billets overlaid initial shock pulses fertilityscore impact, which is applied to diametrically located parts of the outer surface of the billet along the curve having the shape of a logarithmic spiral Bernoulli to provide the degree of deformation on each side of the billet along its entire length, which is determined from the following equation
where εsfodthe degree of deformation of billets on each side, %;
σtthe yield strength of the material of the tubular workpiece, %,
then to pipe the workpiece apply the series of pulses of electric current with a current density in the momentum Q=(1,2...2,0)104(A/m2) when duration of exposure pulses of electric current, which is determined from the following expression
where τ is the exposure duration for tubular workpiece pulses of electric current with;
T is the exposure duration for pipe procurement is the original shock pulse fertilityscore impact, with,
then on the outer surface of the tubular workpiece impose secondary shock impulses fertilityscore effects that make the curve referred to the original fertilityscore impact, ensuring the degree of deformation on each side of the billet along its entire length, which is determined from the expression
where εsfodthe degree of deformation of billets on each side from the secondary shock pulses fertilityscore effects, %.
SUBSTANCE: invention relates to methods of applying electroconductive nanostructurised coverings with high electroconductivity and wear-resistance. Method includes supply of powder composition with reinforcing particles from four measuring apparatuses into supersonic stream of heated gas and application of powder composition on product surface. First, from first measuring apparatus reinforcing ultra-dispersive particles of ZrO2 with fraction from 0.1 to 1.0 mcm are supplied and product surface is processed until juvenile surface is formed. Then powder composition based on Cu or Al is applied on product surface by supplying powder from four measuring apparatuses. From the first measuring apparatus reinforcing ultra-dispersive ZrO2 particles are supplied, from the second - Cu or Al powder, form the third - reinforcing nanoparticles of quasi-crystalline compound of system Al-Cu-Fe, and from the fourth measuring apparatus - reinforcing particles Y2O3. Rate of heterophase flow during application of composition based on Cu or Al is changed within the range from 450 to 750 m/sec.
EFFECT: reduction of porosity, increase of wear-resistance, adhesive and cohesive strength of covering preserving its high electroconductivity.
4 cl, 1 tbl, 1 ex
SUBSTANCE: invention is provided for nanoelectronics, analytical chemistry, biology and medicine and can be used for manufacturing of sensors, polymers and liquid crystals. Between volumes of liquid hydrocarbon composition and electrically conducting liquid it is formed boundary, on which there are actuated microplasmous discharges by means of voltage application between electrodes, located in these volumes. Using power supply with frequency 50 Hz, providing smoothly varying of preset voltage from 0 up to 4000 V, it is implemented anodic or cathodic high-voltage polarisation of boundary and high-temperature electrochemical conversion with formation of carbon-bearing nano-materials. In the capacity of liquid hydrocarbon compound can be used, for instance, benzol or octane; in the capacity of electrically conducting liquid - solution of potassium hydroxide, solutions of halogenides of alkaline metals. On boundary it can be located diaphragm, implemented of glass or from aluminium foil with oxide coating.
EFFECT: receiving the ability to implement controllable synthesis of carbon-bearing nano-materials.
8 cl, 6 dwg, 3 tbl
SUBSTANCE: invention relates to method of receiving of powder of nano-crystalline calcium hydroxyapatite. Nano-crystalline calcium hydroxyapatite is received by interaction of calcium hydroxide and solution, containing phosphate-ions, herewith suspension of calcium hydroxide is prepared directly before interaction with solution, containing phosphate-ions from solutions of calcium acetate and potassium hydroxide, herewith amount of calcium hydroxide is from 50 up to 100% in mixture of calcium-bearing components.
EFFECT: receiving of hydroxyapatite powder with particles size 30 - 50 nm.
3 dwg, 1 tbl, 1 ex
SUBSTANCE: invention relates to method of receiving of nano-crystalline hydroxyapatite. According to the invention calcium nano-crystalline hydroxyapatite is received by interaction of compound of calcium and ammonium hydro-phosphate. In the capacity of calcium compound it is used sugar lime C12H22-2nO11Can, at n, which is situated in the range from 0.5 up to 2. Particles size of the received hydroxyapatite is 30-50 nm.
EFFECT: receiving of nano-crystalline powder of calcium hydroxyapatite, which contains unaggressive biocompatible accompaniment of the reaction and that provides its usage in medicine.
3 dwg, 1 tbl, 1 ex
SUBSTANCE: invention relates to micro system hardware, and can be used in producing sensors based on tunnel effect to convert displacement into electric signal in monitoring data processing systems that serve to forecast, diagnose and control the effects of impact waves and acoustic oscillations exerted onto various structures, vehicles, industrial buildings and structures, as well as to control temperature, develop supersensitive mikes and medicine hardware. In compliance with this invention, the sensor cantilever electrode represents a bimorph beam made up of consecutively formed layers differing in thermal expansion factors. Note that the lower layer thermal expansion factor is lower as compared with that of the upper layer. Note also that the tunnel electrode represents a bundle of nanotubes. The proposed nanosensor incorporates thin-film heater to allow desorption of low-molecular substances, precision alignment of tunnel gap and formation of nanotubes after removal of "sacrificial" service layer.
EFFECT: increased sensitivity, vibro- and impact resistance, manufacturability and reproducibility, lower costs of manufacture.
2 cl, 3 dwg
SUBSTANCE: two fullerenes 1 C20 are put into a closed carbon nanotube 2, at the opposite end of which there is spherical fullerene 3 C60, acting as a plunger, applying a pressure of 43.24 hPa on two fullerenes 1 C20.
EFFECT: obtaining dimers of fullerene C20 without impurity atoms.
3 dwg, 1 tbl
FIELD: chemistry; photographic industry.
SUBSTANCE: invention relates to photographic industry, particularly to technology of silver-halide photographic emulsion preparation. According to the invention the production of photographic emulsion based on silver-halide laminate microcrystals (LMC) with epitaxial nanostructures is started from preparing nuclear emulsion from solution of AgNO3 and KBr. Thereafter, substrate LMC AgBr are derived by adding solution of AgNO3 and KBr in the nuclear emulsion. Annular epitaxial nanostructures containing AgBr/AgCl are formed on the produced LMC AgBr by adding Kl and KCl solutions in reaction mixture. At the final stage, firstly, epitaxial nanostructures are converted by adding solution of KBr into reaction mixture, thereafter the second conversion is carried out by adding small particle emulsion prepared separately and containing AgBr0.98l0.02-AgBr0.90I0.10.
EFFECT: simplification of photographic emulsion preparation with optimal photographic characteristics of light sensitivity, as well as microcrystal dispersion characteristics used in industrially produced photomaterials.
1 cl, 1 tbl, 14 ex
SUBSTANCE: invention relates to nanotechnology and nanostructures, particularly carbon-base materials and can be used in different field of engineering and energetics. In vacuum on substrate made of dielectric material it is sediment evaporated in vacuum silver by means of plasma carbon-base material. Silver sedimentation is implemented before the sedimentation of carbon-base material. Evaporation of carbon-base material, in the capacity of which it is used graphite, is implemented by pulsed arc discharge. Plasma for sedimentation of carbon-base material is created outside the discharge gap area of voltaic arc in the form of compensated currentless for-coagulates of carbonaceous plasma with density 5-1012-1·1013 cm-3, duration 200-600 mcs, recurrence rate 1-5 Hz. During the sedimentation process of carbon-base material it is implemented stimulating effect of carbonaceous plasma by inert gas in the form of ion flow with energy 150-2000 eV, which is directed perpendicularly to carbonaceous plasma stream. Then substrate with sediment on it silver and carbon-base material is extracted from vacuum chamber and annealed on air at temperature 400°C during 10 minutes.
EFFECT: it is manufactured carbon-base material, containing metal, with new properties, for instance electrical conductance and transparency.
FIELD: production processes.
SUBSTANCE: invention refers to obtaining of wear-resisting ultra-hard coatings, namely, to forming of diamond-type coatings and can be used in metalworking, engineering industry, nanotechnologies, medicine and electronics. Preliminary there performed is product surface plasma stripping by accelerated ions in vacuum chamber at pressure of 10-3 - 10 Pa. Then adhesion layer is applied by plasma method. The thickness is 1-500 nm. The layer is made from metal that belongs to the group of aluminium, chrome, zirconium, titanium, germanium or silicone or their alloys. At the same time the product receives direct or pulse negative voltage of 1-1500 V. Then there applied is intermediate layer with thickness of 1-500 nm. It consists of carbon and metal mixture. Metal belongs to the group of aluminium, chrome, zirconium, titanium, germanium or silicone or their alloys. Intermediate layer is applied at ascending changing of carbon concentration in this mixture from 5 to 95 at.%. At the same time the product receives direct or pulse negative voltage of 1-1500 V. Then there applied is at least one layer of carbon diamond-type film by graphite cathode or laser spraying or by plasma destruction of carbon-bearing gases or carbon-bearing liquid vapours.
EFFECT: increase of adhesion, wear resistance and temperature stability of diamond-type coating.
11 cl, 1 dwg, 5 ex
SUBSTANCE: invention relates to metallurgy field and can be used for manufacturing of high-duty cast iron with globular graphite. For receiving of magnesium-bearing nano- modifying agent is blended with water solution of polyvinyl alcohol, chloride of magnesium and iron in molar correlation (10-5):1:1, agreeably, it is evaporated specified mixture before gel formation after what it is implemented carbonation at temperature 350-500°C in atmosphere of inert gas with formation of carbon nanotube, filled by chloride of magnesium and iron.
EFFECT: invention decrease magnesium losses 1,5-2 times with introduction of nano- modifying agents into the cast iron.
6 ex, 1 tbl, 6 dwg
SUBSTANCE: inventions are referred to metallurgical mechanical engineering and may be used for items production from the cylindrical work pieces, mainly from aluminium alloys by thyxotropic moulding method. The work piece is heated together with a container, where it is put before heating and closed with a cup. The heated work piece is then deformed at press in a pre-heated closed die. The die includes a low semi-die with cavity, kick-off mechanism and upper semi-die fixed to the movable plate. The latter is provided with an open-end cylindrical opening. The heated container together heated work-piece and cup is mounted on the kick-off mechanism lifted above the end side of low semi-die and adjusted along the kick-off mechanism axis. After that the container is step-by-step removed from the working area during intermittent motion of the kick-off mechanism. Then press is closed with the upper semi-die and kick-off mechanism together with work piece and cup is brought to the lower position. Besides it is ensured that the work-piece is placed in the open-end opening of the upper semi-die. Then the cup is removed and work-piece is deformed by the punch setting in the open-end opening of the upper semi-die and in the cavity of the lower semi-die. Finally, the set work-piece is deformed by the upper semi-die and punch to the production of finished item.
EFFECT: increased productivity and quality of finished items, reduced consumption of metal.
2 cl, 7 dwg
SUBSTANCE: invention relates to metal deformation process and can be used at manufacturing of products of cylindrical work, shaping. Preheated cylindrical work is deformed on press in preheated closed die. Die contains puncheon, bottom semimartingale and upper semimartingale with through cylindrical cavity. Upper matrix overlaps die by internal diametre of bottom semimartingale and allows translational displacement. Cylindrical work is installed by axis of bottom semimartingale in through cavity of top semimartingale. It is settled work by puncheon with providing of upper semimartingale lifting under the action of feeding into the die cavity of work material. Then it is deformed settled work with receiving of finished product by joint omission of upper semimartingale and puncheon.
EFFECT: it is provided increasing of productivity and quality of finished products, assortment broadening.
2 cl, 5 dwg
SUBSTANCE: invention relates to metallurgy field. Particularly it relates to thermomechanical treatment of magnesium alloys and can be used while manufacturing of details in aircraft building, rocket technology, motor car structure, in nuclear reactors. Method includes alloy homogenising annealing at the temperature 415-520°C during 4-24 hours, extrusion at the temperature 300-450°C with drafting ratio 7-18 and equal channel angular extrusion at the temperature 250-320°C with true deformation ratio 6-8.
EFFECT: increasing of solidity and plasticity of magnesium alloys.
FIELD: engines and pumps.
SUBSTANCE: device for processing comprises puncheon and upper and lower semi-matrices fixed on base. Semi-matrices are arranged, accordingly, with vertical and horizontal intersecting channels. Lower semi-matrix consists of two parts, which may rotate in opposite directions by means of rigidly fixed gear wheels. Horizontal channel is arranged with cross section, having shape that differs from circular one. At the outlet of horizontal channel, coaxially to it, replaceable orifice is installed. Orifice is rigidly fixed to lower semi-matrix and has hole, which is less than outlet hole of horizontal channel provided that internal pressure in billet makes 5-10 GPa. Vertical channel has inlet part. Area of this part cross section exceeds area of vertical channel cross section 2-10 times. Horizontal channel has inlet cylindrical part. Diameter of cross section D of this part is equal to diameter of vertical channel cross section, and length A makes (0.1-2) D. Parts of lower semi-matrix are installed with clearance in horizontal channel equal to 0.05-0.5 mm.
EFFECT: improved mechanical properties and quality of processed billets.
SUBSTANCE: facility contains driving rotor wheel with gauge, shoe with insert and support. Specified elements have work surface, forming pressing channel. Support is installed on area, which is moved by means of thrust screw for slide control of pressing channel height. As a result of this regulation cross-section of channel on outlet from deformation site have to be 3-5% exceeding cross-section at inlet into deformation site.
EFFECT: cost cutting of blanks treatment.
FIELD: metallurgy, possibly production of homogenous fine-grain titanium material.
SUBSTANCE: according to first variant of invention method comprises steps of first heat treatment of blank of titanium material due to heating it till β-region; quickly cooling blank till (α + β)-region and forging it while creating at deforming process super-plasticity condition; then performing second heat treatment due to realizing recrystallization annealing for producing grain size in range approximately from 5 micrometers till 20 micrometers. According to second variant of method blank of double-phase titanium material is subjected to first heat treatment due to heating it till β-region. Heating temperature is in range approximately from 600°C till approximately temperature of polymorphous phase conversion of titanium material. Blank is quickly cooled till (α + β)-region and it is subjected to forging while creating super-plasticity condition. Then second heat treatment is realized due to performing recrystallization annealing. In the result double-phase material with grain size 15 - 20 micrometers is produced.
EFFECT: possibility for producing material that may be subjected to ultrasound flaw detection at high accuracy.
14 cl, 8 dwg, 3 tbl, 5 ex
FIELD: plastic working of metals, possibly manufacture of blanks designed for producing hollow thin-wall articles such as aluminum tubes, bottles.
SUBSTANCE: method comprises steps of feeding initial predetermined-size material to pressing machine having working units. In said working units initial material is subjected to successive parametric pressing by transitions. Pressing is realized at speed directly proportional to specific pressure of pressing process according to relation: Vt = KPt where Vt -parametric pressing speed at time moment t; Pt - specific pressure of pressing process at time moment t; K = (Pend - Pst)tk - proportionality coefficient; Pend - specific pressure at pressing process termination; Pst - specific pressure at pressing process starting; tk - time period of pressing process.
EFFECT: improved quality of blanks, enhanced efficiency of production of ready articles.
2 cl, 1 dwg
FIELD: pressure shaping; manufacture of blanks from materials at preset structure including submicro-crystalline structure and nano-crystalline structure at respective level of physico-mechanical properties.
SUBSTANCE: proposed method consists in successive deformation cycles of initial blank by compression in height, thus obtaining blank with lateral faces. Proposed method ensures smooth plastic flow of material of blank in opposite directions along axis perpendicular to direction of application of deformation force. Each deformation cycle includes placing the blank in device, subjecting it to deformation, withdrawing the blank from device and re-setting for next cycle. Device proposed for realization of this method has working part with cavity and upper and lower punches. Working cavity consists of two parts: upper and lower. Lower part is widened along one of its horizontal axes.
EFFECT: enhanced homogeneity of ultrafine-grained structure at improved mechanical properties.
9 cl, 4 dwg, 1 tbl, 1 ex
FIELD: plastic working of metals, possibly production of forged pieces.
SUBSTANCE: apparatus for making forged pieces having length to diameter relation more than 3 includes power hydraulic cylinder on plunger of which upper striker is mounted. Lower striker is mounted in rotary mechanism. The last is in the form of kinematics pair having gear wheel and racks rigidly secured to plungers of hydraulic cylinders. Apparatus also includes second power hydraulic cylinder whose plunger is mounted in gear wheel with possibility of axial motion and rigidly joined with lower striker. Both power hydraulic cylinders separately through pipelines and throttles are communicated with respective hydraulic cylinders of rotary mechanism.
EFFECT: improved design of apparatus, increased degree of plastic deformation of blank at its single mounting operation in apparatus.
FIELD: plastic working of metals, possibly realization of blank working operations designed for developing high technology of thermo-mechanical working.
SUBSTANCE: apparatus includes housing where lower stop and both movable relative to housing punch and upper stop are arranged. Said stops have notched surfaces for engaging with blank and their ends are in contact respectively with punch and supporting plate. Stops may move relative to punch and supporting plate in mutually opposite directions normal relative to axis of housing. Apparatus is also provided with two wedges. Housing may move relative to supporting plate and it includes two annular grooves arranged in upper and lower parts of housing and designed for placing said wedges. Upper and lower stops form with wedges wedge pairs.
EFFECT: simplified design of apparatus, increased efforts applied to blank.
FIELD: process for manufacturing of flexible guide for glass lifter used in automobile construction industry.
SUBSTANCE: method involves bending flat blank for creating of U-shaped cross-sectional profile having bottom and vertical walls with bent horizontal strip; providing radial bending thereof. Bending of flat blank is carried out by means of punch in die for thinning of vertical walls in outer cross section by means of skew portions provided on die, said bending process being carried out simultaneously with radial bending and die stamping of slot on horizontal strip on the side of die. Method allows vertical walls to be created, which have thickness of cross-sectional profile equal to nominal thickness of material of flat blank and thickness at the bottom equal to 0.87 the nominal thickness of material of flat blank.
EFFECT: increased efficiency in bending of cross sectional profile, providing transverse stretching of material simultaneously with radial bending in stamp die of simplified construction and on stamping press of simplified operation.
2 dwg, 1 ex