Method of making bore with grooves

FIELD: weapons.

SUBSTANCE: present invention pertains to military equipment and can be used when making high-precision small arms. A mandrel bar or puncheon is put into the channel of barrelled work-piece and a channel with grooves is formed through rotary forging or drawing. The surface of the work-piece channel is pre-activated and then coated with a composition. The composition assumes functions of lubricant material and provides for a wear-proof coating when making the channel with grooves. The composition contains a mixture of homogeneous and heterogeneous catalysts and dispersion reinforcement systems in viscous carrier and natural minerals in the class of carbonates, halogenides, sulphates, silicates and oxides with combined concentration of 20-40 wt %. The natural minerals are modified until formation of a porous layer of minerals on the surface of the channel, forming hydrophilous-hydrophobic splices, filled with organic ligands. The work-piece then undergoes thermal processing for 2-4 hours at 130-140°C, after which a channel with grooves and a wear-proof coating are simultaneously formed.

EFFECT: reduced labour input in manufacturing with improved tactic-technical and operational characteristics of the barrel at the same time.

2 cl, 5 dwg

 

The invention relates to the field of military equipment, in particular to the technology of the barrel with rifling precision small arms, and is intended for use in the manufacture of trunks.

As you know, tactical-technical characteristics of rifled guns depend on the accurate performance of the rifling in the barrels, their parameters, type of coverage and survivability of the rifling.

A method of obtaining barrel with rifling, which includes the operation of forming the grooves by means of a special cutting tool (see [1]). In this way the characteristics of the trunk are directly dependent on the quality of machining, perfect equipment and cutting tools and skills of the working-stolnici. In one pass of the cutting tool rifling intensified at 5 microns. To obtain the necessary depth of the grooves takes about 25-30 passes of the cutting tool. The entire process of making rifling takes about 1 hour. This process is very time-consuming and expensive.

A method of obtaining barrel with rifling method of plastic deformation of the workpiece on the mandrel (punch) (see [1]). It includes the following technological transitions:

- manufacturing billet trunk (deep drilling, reaming, electrochemical polishing, honin the Finance);

- the formation of the grooves in the channel of the workpiece hole through the plastic deformation on the mandrel, made of tool steel or carbide with special anti-friction of lubricants (grease COI - 14, chemical, copper and the like) by means of press-forging equipment:

- rotary forging machines by rotary compression;

- drawing installations by hydroextrusion;

- hydraulic presses by pressing.

These methods compared to the previous in order to improve productivity and reduce the cost of manufacture.

The disadvantage of these methods is the need for coating.

The prototype of the present invention, the selected method of manufacturing a rifled barrel using a rotary forging mandrel (see [1]). In this way the receiving bore with rifling workpiece coated with a special anti-friction technology lubricant is placed on the mandrel and as prosovyvaniya billet stem of the mandrel is pushed along the mandrel while the mandrel is rotating.

This method has significant drawbacks: the application and removal of special anti-friction technological lubricants, protective wear-resistant chrome plating with corresponding methods of preparing the surface and, bezodiazepine chrome plating and mechanical lapping the barrel after plating (see [2, 3]).

The invention solves the problem of reducing the complexity of the manufacturing process while simultaneously, a significant increase of the tactical-technical and operational characteristics of the trunk (and accordingly weapons in General) by simultaneous formation of the grooves and wear-resistant coatings on the surface of a bore.

This problem is solved due to the fact that according to the invention in a method of producing a bore with rifling method of plastic deformation, which includes the introduction in the channel of the receiver workpiece mandrel or punch and forming a channel with the rifling by means of rotary forging or drawing, what is new is that pre-surface channel receiver billet trigger, after which it put a structure that performs during the formation of the barrel with rifling functions of a lubricant, providing in the process a specified formation formation on the surface of the barrel with rifling wear-resistant coatings containing a mixture of homogeneous and heterogeneous catalysts and dispersion-hardening systems, viscous media and natural minerals classes of carbonates, halides, sulfates, silicates, silicates and oxides total concentration of 20-40 weight %, which is subjected to m the modification prior to the formation on the surface of the channel receiver blanks porous layer of minerals, forming a hydrophilic-hydrophobic clusters, filled with organic ligands. Then the receiver of the workpiece is subjected to heat treatment within 2-4 hours at a temperature of 130-140°C. Then in its channel enter a mandrel or punch and form a channel with the rifling with the simultaneous formation of wear-resistant coatings.

The operation of activating the surface of the channel receiver of the workpiece is performed with the mixture of natural minerals, which are used carbonates, halides, sulfates, silicates, oxides and biological enzyme systems total concentration of 3-5 weight % dissolved and suspended in a volatile inert carrier such as isopropyl alcohol, at a temperature of 70-90°C for 60-90 minutes.

As a result of implementation of this method is formed a bore with already applied coating.

The invention is illustrated by drawings:

- figure 1 shows the technical implementation of the method of obtaining the barrel with rifling through rotary forging;

- figure 2 shows the technical implementation of the method of obtaining the barrel with rifling through drawing;

- figure 3 shows the cross-section of the workpiece rifled barrel coated with SPF;

- figure 4 shows a cross-section of the barrel with rifling and is formed by coating;

- figure 5 shows a photograph of coverage, receive the frame in the process of implementing the inventive method.

As a result of implementing the claimed method of producing a bore with rifling method of plastic deformation of the workpiece, which includes the operation of rotary forging or drawing, the inner smooth surface of the workpiece shaft 1 pre-activate, i.e. free from oxides, resins, carbon and other impurities, is not peculiar to the metal barrel. For this purpose, the surface of the channel receiver of the workpiece is treated with a composition comprising a catalytic system obtained by hydrothermal synthesis method, using a mixture of natural minerals: carbonates, halides, sulfates, silicates, oxides and biological enzyme systems total concentration of 3-5 weight %dissolved and suspended in a volatile inert medium, in this case, isopropyl alcohol, at a temperature of 70-90°C for 60-90 minutes. After this operation turns juvenile surface, i.e. the surface that is free not only from all kinds of impurities, but also enriched with special catalytic complexes that facilitate subsequent forming on it a protective coating. Then perform the operation of applying makeup, performing in the formation of the barrel with rifling functions of a lubricant, which forms a continuous film with a thickness of about 100-200 μm, reduces the coefficient of friction of steel on steel and the act is obstruse facilitate the formation of a bore and the formation of the grooves. This complex composition is a mixture of homogeneous and heterogeneous catalysts and dispersion-hardening systems (i.e., a mixture in which at the same time present a true and colloidal solutions and suspensions and emulsions) in viscous media, which in this particular case, used industrial oil, for example, with a kinetic viscosity of from 10 to 40 mm2/s at 40°C, and natural minerals classes of carbonates, halides, sulfates, silicates and oxides total concentration of 20-40 weight %, which is subjected to modification prior to the formation on the surface of the channel receiver blanks porous layer of the minerals forming the hydrophilic-hydrophobic clusters, filled with organic ligands, i.e. to obtain a surface layer formed by "cooked" under pressure and temperature in the presence of catalysts minerals forming the hydrophilic-hydrophobic clusters, and filled with organic (organic ligand), a cermet or a mechanical mixture. After this, the workpiece is subjected to heat treatment within 2-4 hours at a temperature of 130-140°C. Then, the channel receiver blanks enter the mandrel or punch 3 and carry out rotary forging shaft, i.e. the operation of forming a bore.

Additionally, in the drawing:

- pos.4 - hammers machine is otational forging;

- 5 - matrix.

As a result of implementation of this method turns out the barrel with rifling and simultaneously forms a protective wear-resistant coating. The coating is a continuous, nonuniform film thickness of 20 μm, having diffusing the transition zone of the protective layer coating the metal of the trunk.

Thus, the obtained in this way the barrel with rifling and coated multifunctional composition surpasses trunks, obtained by conventional methods on the basic parameters of internal and external ballistics.

Tested shafts for high-precision weapons have confirmed their high efficiency (see photo 5, which shows a fragment of the barrel with rifling sniper rifle OSV-96, obtained by rotational forging blanks on the mandrel).

Sources of information

1. Gaivoronsky A.T. Formation of gun barrels. Yekaterinburg, ed. The Ural branch of the Russian Academy of Sciences, 1998, p.3-11 (analogues), 152-158 prototype;

2. Galvanic coatings in engineering. The Handbook. Edited Massager. M., engineering, 1985, vol.1

3. OST 3-4123-78. Coating of metal, non-metallic, inorganic. Typical technological processes for the production of coatings.

1. The method of obtaining the barrel with rifling method of plastic deformation, which includes the introduction in the channel the receiver is of the workpiece mandrel or punch and forming a channel with the rifling by means of rotary forging or drawing, wherein the pre-surface channel receiver billet trigger, after which it put a structure that performs during the formation of the barrel with rifling functions of a lubricant, providing in the process a specified formation formation on the surface of the barrel with rifling wear-resistant coatings containing a mixture of homogeneous and heterogeneous catalysts and dispersion-hardening systems, viscous media and natural minerals classes of carbonates, halides, sulfates, silicates and oxides total concentration of 20-40 wt.%, which is subjected to modification prior to the formation on the surface of the channel receiver blanks porous layer of the minerals forming the hydrophilic-hydrophobic clusters, filled with organic ligands, then the receiver of the workpiece is subjected to heat treatment within 2-4 hours at a temperature of 130-140°C and then in its channel enter a mandrel or punch and form a channel with the rifling with the simultaneous formation of wear-resistant coatings.

2. The method according to claim 1, wherein activating the surface of the channel receiver of the workpiece is performed with the mixture of natural minerals, which are used carbonates, halides, sulfates, silicates and oxides, and biological enzyme systems total concentration of 3-5 wt.%, dissolved and suspended in volatile trade is Mr. media for example isopropyl alcohol, at a temperature of 70-90°C for 60-90 minutes



 

Same patents:

FIELD: metallurgy.

SUBSTANCE: heat-resistant coating system consists essentially plastic basis from bonding agent and multitude essentially solid nano-dimensional ceramic particles, allocated in essentially plastic basis from bonding agent. Middle free space between multitude of essentially solid nano-dimensional ceramic particles has value, founded in the range of nano-dimentions. Bonding basis contains at least one component, chosen from superalloy, alloy for solid soldering, multiphase alloy, low-temperature alloy, heat-resistant alloy, intermetallic material, semiconducting metal, ceramic solids and alloy with shape memory. Multitude nano-dimensional ceramic particles contains at least one component, chosen from ceramic oxide, ceramic carbide, ceramic nitride, ceramic boride, metal silicide, ceramic oxycarbide, ceramic oxynitride and carbon.

EFFECT: nano-structural coating systems, providing achieving of increased erosion resistance, corrosion stability, resistance against destruction while blow by solid particles and cavitation resistance at rather low temperatures.

14 cl, 5 dwg

FIELD: metallurgy.

SUBSTANCE: invention can be used for protection of details made of steel, nickel and titanium alloys against saline and fretting corrosion and contact wear. Composition for receiving of coating on details made of structural steel or of heat-resistant alloy on the basis of nickel or titanium, contains following ratio of ingredient, wt %: aluminium-chromium-phosphate binding substance - 30-35, water - 12-18, chromic anhydride - 2-3, molybdenum disilicide - the rest. Molybdenum disilicide powder has fraction till 10 micrometer. In particular cases of invention implementation compound can additionally contains 0.3-0.5 wt % of surface-active material, for instance synthanol, "ОП"-7, "ОС"-20, "АФ"-10.

EFFECT: resistance against saline and fretting corrosion, against contact wear.

3 cl, 2 tbl, 1 ex

FIELD: machine building.

SUBSTANCE: invention deals with application of coatings (in particular - those of rubber materials) onto worn or newly-fabricated machinery parts and may be equally relevant for worn component parts repair and fabrication of new machinery products operating under lubricated sliding friction conditions. The proposed coating formation method envisages application of a metallopolymer material onto the component part worn-out surface followed by the surface shaping with the help of a stamping punch or a master form or by way of mechanical treatment. The above process is combined with metal grid being contact-welded onto the component part surface. After that a rubber compound is applied onto the component part surface that undergoes curing and surface shaping treatment.

EFFECT: improved abrasive and fatigue resistance of the coating.

FIELD: metallurgy.

SUBSTANCE: invention refers to method of applIication coating for inhibition of reactivity of super-alloy on nickel base. A material inhibiting reactivity is applied on the surface of super-alloy on Ni base prior to application of diffusive aluminium coating. The material inhibiting reactivity corresponds to pure Ru, alloy of Co-Ru, alloy of Cr-Ru or solid solution, the basic component of which is Ru, also formation of the secondary zones is retarded.

EFFECT: production of coating for inhibition of reactivity of super-alloy on nickel base at retarding formation of the secondary reaction zone.

7 cl, 19 dwg, 4 tbl

FIELD: chemistry.

SUBSTANCE: present invention pertains to coating compositions for protecting steel and can be used in the machine building industry for protecting big work-pieces made from low-alloyed and low-carbon steel from high-temperature corrosion during process heating before hot treatment with pressure, particularly press forming. The coating composition contains, as refractory filler, quartz sand, clay mineral and kaolinised chamotte. The glass component is in form of datolite concentrate, sodium tripolyphosphate and aluminoborosilicate glass, with the following content of components, in wt %: quartz glass 18.0-20.0, Latnen clay LT - 0.30-4.0, datolite concentrate 14.0-16.0, sodium tripolyphosphate 0.5-1.0, kaolinised chamotte 38.0-40.0, aluminoborosilicate glass 23.0-25.0. All materials of the composition are ground up such that they can pass through a sieve with 10000 openings per cm2. The aluminoborosilicate glass has the following chemical content, wt %: SiO2 66.0 ± 0.5, Al2O3 12.0 ± 0.5, B2O3 8.0 ± 0.5, CaO 7.0 ± 0.5, Na2O 7.0 ± 0.5.

EFFECT: reduced loss of metal into slag during thermal treatment and reduced labour and energy inputs for manual or mechanical cleaning of surfaces of steel work-pieces after press forming.

2 tbl

FIELD: engines and pumps.

SUBSTANCE: invention is related to turbine blade with coating for deterrence of Ni-based superalloy reactivity. Specified coating is made by application of material for reactivity deterrence on Ni-based superalloy surface prior to application of diffusion aluminium coating. Material for reactivity deterrence represents pure Ru, alloy Co-Ru, alloy Cr-Ru or solid solution, the main component of which is Ru, at that creation of secondary reaction zones is deterred. Turbine blades are produced with higher resistance to Ni-based superalloy oxidation by deterrence of secondary reaction zones creation.

EFFECT: higher resistance to Ni-based superalloy oxidation.

7 cl, 4 tbl, 13 dwg, 2 ex

FIELD: metallurgy.

SUBSTANCE: invention concerns methods of strengthening and modification of surface and can be used for endurance increasing of details made from titanium alloys, operating in corrosion-active mediums with presence of abrasive particle and high speeds of aggressive solution stream. It is implemented electrospark alloy addition of surface layer and following oxidation or nitriding. Electrospark alloy addition is implemented by nitride-forming elements or alloys on it basis. Then it is implemented thermal oxidation in oxidising air quality at the temperature 600-800°C during 2-16 hours or diffusive nitriding, which is implemented in catalystically prepared gas ammoniac environment at the temperature 500-680°C during 15-40 hours. In the capacity of nitride-forming alloys there are used ligature VCMA.

EFFECT: increasing of resistance against corrosion-erosion effect of corrosive mediums for products made of titanium alloys.

2 cl, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to mechanical engineering. The proposed method of producing recoverable antifriction and wear-resistant coat for machinery assembly units and parts consists in arranging a ground mineral composition between the surfaces of to make an antifriction coat. Mineral oil and/or grease, e.g. Litol-24 is used as a binder. The aforesaid ground mineral composition is made up of the following compounds, wt %, 20 to 50 of Antigorit (Mg, Fe2)3Si2O5(OH)4, 20 to 40 of Lizardite Mg3Si2O5(OH)4, 1 to 25 of periclase MgO, 1 to 7 of Shungite CaWO4 and 5-14 water. Note that the aforesaid ground mineral compound is mechanically activated with its binder in the ratio of 0.03-3%. After extra processing of the ground mineral composition for 10-150 min and formation of a film, the said composition is subjected to stabilisation for 12-60 hours to provide for increase in strength and optimum recovery of the assembly unit geometry.

EFFECT: longer life, higher wear resistance, longer storage term thanks to wear resistant film formed on friction surfaces.

4 ex

Protective coating // 2342218

FIELD: metallurgy.

SUBSTANCE: coating protects founding and other metallic products against corrosion at the expense of reduction of oxidation rate. Protective coating contains following components, wt %: clay 49-51, borax 30.4-33, potassium chloride 5.6-5.8, soda 12.4-12.8.

EFFECT: protection of metal surface against oxidation.

FIELD: metallurgy, coating.

SUBSTANCE: invention concerns mechanical engineering field. Particularly it concerns method and structure of precision brassing of sleeve-type detail and can be used for application of enduring and antifrictional coverings made of ductile metal on internal cylindrical surfaces of vehicular equipment details. At plating it is implemented outrunning cleaning of treated surface by high-pressure stream of process liquid, which is fed with alternating direction and inclination to work area. Stream is fed from cross-hole, communicating to chamber of internal well, implemented in spent part of chafing roller. It is implemented rolling movement of roller relative to longitudinal axis in the line of opposite direction to sense of power-tooling unit rotation, creating firm precision contact between spent part of chaffing roller and detail surface which is wet by layer of process liquid. Simultaneously it is implemented strengthening treatment by means of superficial-plastic straining of treated surface material of detail by strain hardening depth 70-80 mcm.

EFFECT: providing of effective detail brassing.

2 cl, 4 dwg

FIELD: metallurgy.

SUBSTANCE: hollow cylinder stock is brought with its not subject to treatment end to clamping device and fixed in it. After that a mandrel with a coaxially inserted and lengthwise set off spike is introduced into the end of the zone of the stock, subject to treatment. Its free end passes up to the clamping device. The end of the spike is brought after that in an axial direction of the stock into contact with geometric locking with the clamping device. The mandrel together with the clamping device and stock are axially passed through a stationary technological position. To facilitate inside and, if necessary, outside profiling, the surface of the stock along the section subject to treatment is radially effected in this position. The device contains the first and axially installed to it the secondary spindle straddles, axially set off to the first spindle straddle mandrel and the stationary technological position with cold fabrication tools for operating radially to the axis of the straddle. The clamping device is located coaxially against the axis of the first straddle and it is designed to be set off against the technological position. At that the technological position is situated stationary between the spindle straddles. There is also the movable spike axial-symmetrically situated inside the mandrel.

EFFECT: extended technological capabilities.

24 cl, 7 dwg

FIELD: plastic working of metal, possibly forming on inner surface of tubular blanks with bottom multi-stat helical riffles of mutually opposite directions at manufacturing fragmentation type envelope of ammunition.

SUBSTANCE: riffles form grid of rhombic protrusions. In order to form such riffles, tubular blank is reduced by two successive operations. At each operation tubular blank and punch with helical protrusions are together pulled through sizing die. Each operation is realized at least during two transitions while punches whose length is multiply less that length of blank are used. Common pulling through of blank and punch during first transition of each reduction operation is realized while punch rests upon bottom of blank. Between transitions at each reduction operation punch is unscrewed from blank with formed helical riffles for forming between punch and blank band of engagement of helical protrusions of punch and helical riffles of blank. Said band is used at next reduction transition for resting punch and for providing desired direction of formed helical riffles.

EFFECT: enlarged functional and manufacturing possibilities of method.

5 dwg

FIELD: plastic working of metals, possibly manufacture of parts with shaped contour, for example polyhedral parts.

SUBSTANCE: method comprises steps of forming round cross section semi-finished product; embossing its surface for forming relief in the form of alternating protrusions and recesses and shaping curvilinear contour of said relief. Size of shaped contour corresponds to size of profile of ready part. Diameter of described circle passing through apexes of curvilinear protrusions is selected in range consisting of (1.15 - 1.35) of diameter of inscribed circle passing through apexes of recesses of part. Curvilinear contour of protrusions and recesses is shaped due to acting upon semi-finished product by means of shaping tool having profile of working surface in the form of curvilinear protrusions. The last have curvature radius with curvature centers spaced from part symmetry center by distance exceeding by 1.65-1.8 times distance from said symmetry center till curvature centers of curvilinear protrusions of part. Curvilinear recesses are alternated with curvilinear protrusions on working surface of shaping tool. Diameter of described circle passing through apexes of said recesses consists (1.15 - 1.35) of diameter of inscribed circle passing through apexes of curvilinear protrusions.

EFFECT: enlarged manufacturing possibilities of method and apparatus.

8 cl, 8 dwg

The invention relates to the processing of metals by pressure and can be used in forging and stamping upon receipt of long panels with ribs

The invention relates to the processing of metals by pressure and can be used in forging and stamping upon receipt of long panels with single-sided stiffeners used, for example, in aircraft construction

The invention relates to the processing of metals by pressure and can be used for the formation on the surface of the workpiece by means of a formative element of the profile, such as precision teeth

The invention relates to the processing of metals by pressure, namely the cold instrument, and can be used in the manufacture of core products with different shapes of heads on cold machines

The invention relates to the processing of metals by pressure, namely the cold instrument, and can be used in the manufacture of core products with different shapes of heads

The invention relates to the field of metal forming and can be used at specialized repair shops when restoring a hot draught axes of the rear axles of trucks

FIELD: plastic working of metals, possibly manufacture of parts with shaped contour, for example polyhedral parts.

SUBSTANCE: method comprises steps of forming round cross section semi-finished product; embossing its surface for forming relief in the form of alternating protrusions and recesses and shaping curvilinear contour of said relief. Size of shaped contour corresponds to size of profile of ready part. Diameter of described circle passing through apexes of curvilinear protrusions is selected in range consisting of (1.15 - 1.35) of diameter of inscribed circle passing through apexes of recesses of part. Curvilinear contour of protrusions and recesses is shaped due to acting upon semi-finished product by means of shaping tool having profile of working surface in the form of curvilinear protrusions. The last have curvature radius with curvature centers spaced from part symmetry center by distance exceeding by 1.65-1.8 times distance from said symmetry center till curvature centers of curvilinear protrusions of part. Curvilinear recesses are alternated with curvilinear protrusions on working surface of shaping tool. Diameter of described circle passing through apexes of said recesses consists (1.15 - 1.35) of diameter of inscribed circle passing through apexes of curvilinear protrusions.

EFFECT: enlarged manufacturing possibilities of method and apparatus.

8 cl, 8 dwg

Up!