A method of manufacturing a valve of the internal combustion engine (options)

 

(57) Abstract:

The invention relates to the field of metal forming and can be used in the manufacture of valves for internal combustion engine. According to the first variant of the method, the workpiece is set in the matrix to receive the protruding part whose length is not more than three times the diameter of the workpiece. Then form the valve plate by mechanical flattening the protruding portion of the plug, which is installed at an angle to the axis of the matrix, comprising 0.5 to 15o. According to the second variant of the method, the workpiece is set in the matrix, made with a hole diameter equal to the diameter of the legs of the valve, and a tapered surface in the Central part. The valve plate form a mechanical rolling of the workpiece by the punch set at an angle to the axis of the matrix. In the process of the mechanical rolling produce squeezing the legs of the valve into the hole matrix. The result is the obtaining of the valve structure, characterized by a uniform distribution of fibers parallel to the contour of the valve. 2 S. and 2 C.p. f-crystals, 1 Il.

The invention relates to the processing of metals by pressure and can be used for the main requirements for valves for internal combustion engines is their operational stability. Therefore, the absolute requirement for the material of the valve is that the macrostructure of the valve in longitudinal section must conform with the fiber direction parallel to its outer contour. The interruption of the fibers and loops are not allowed.

A known method of manufacturing products of the type of valve for an internal combustion engine by conventional hot pressing in the end, Forging and stamping: a Handbook /edited by E. Semenova, I. - M.: mechanical engineering. - 1986. - So 2, 592 C.). When this rod is cylindrical blank having parallel longitudinal axes and forming external arrangement of the fibers are placed in the matrix and through the normal pressure of the punch on the entire surface of the end face of the workpiece carry out the shaping of the metal. When this distorted line fiber structure with a bend them inward volume of the workpiece, with the formation of asymmetric loops.

The closest technical solution, selected as a prototype, is a method of manufacturing a valve of the internal combustion engine by mechanical rolling (RF patent 2043811, 21 D 37/12, 1995). In the known method after the introduction of the matrix undistorted part of the bar stock include rotation matrix, under the tion of the valve in the local deformation zone. After the flattening punch away and valve vyrisovyvaet from the matrix ejector.

When the mechanical rolling is the local application of the load, under the action of which the end of the fiber facing the end face of the workpiece, is moved from the center to the periphery of the cross-section of the workpiece, carries the cross for metal. To obtain the desired direction of the fibers of the internal structure of the valve it is necessary to focus on the symmetric movement of the upper end of the fiber preform to the periphery of the valve under the action of the deforming tool. Such pre-emption over the end of the fibers occurs in the layers of metal of the valve adjacent to rescatame punch. The greater the angle of inclination of the axis Raskatov punch to the vertical, the more intensive is ahead endings of fibers in the upper part of the valve-their middle and lower parts. When this happens the surface after the metal from the Central layer to the periphery of the valve, and the fiber is bent in accordance with the outer contour of the valve. At small angles of tilt deformation penetrates deeper into the metal volume of the valve and the intensity of the move is the first fibers and the formation of loops. However, a deeper study of the volume of the metal improves the microstructure. It is therefore necessary to consider the optimal combination of process parameters to meet the symmetric directions of the fibers corresponding to the outer contour of the valve, to avoid the formation of folds, knots, loops of fibers.

However, the known method does not provide reliable acquisition of the necessary macro-structure of the valve.

The invention is directed to a method of manufacturing a valve for an internal combustion engine, providing a reliable receipt of the macrostructure of the valve, characterized by parallelism and uniformity of the fibers in longitudinal section.

This technical result in the implementation of the invention is achieved in that in the known method of manufacturing a valve of the internal combustion engine, including the installation of a billet in a matrix with receiving the protruding portion of the workpiece and the forming of the valve by mechanical rolling serving deformable part punch set at an angle to the axis of the matrix, when mounting the workpiece in a matrix protruding deformable part get deleteplayer 0.5 to 15o.

In addition, protruding from the matrix of the deformable portion of the workpiece is performed with the angle of the lower generatrix to the horizontal plane, not a smaller angle to the horizontal plane forming the valve.

According to the second variant in a known method of manufacturing a valve of the internal combustion engine, including the installation of a billet in a matrix, made with a hole diameter equal to the diameter of the legs of the valve, and the formation of the valve-mechanical rolling stock other one, set at an angle to the axis of a matrix, use the matrix with the conical surface in the Central part, and the mechanical rolling of the workpiece is performed with simultaneous squeezing the legs of the valve into the hole matrix.

Punch establish a gender angle to the axis of the matrix, comprising 0.5 to 15o.

The angle of the axis of the punch to the axis of the matrix is 0.5-15obecause when the angle < 0,5othat middle part of the fibers receive more intensive movement to the periphery than the top, and can form loops and nodes as in a conventional stamping, in addition, do not get reduction efforts deformation characteristic of the mechanical rolling. When plutella throughout the volume of the plates, which leads to the formation of discontinuities, cracks and deviations from requirements of the microstructure of the material.

When the ratio H/D>3 is the curvature of the roll out of the workpiece, its curve and , as a consequence, the failure to obtain the desired geometry of the valve, the one-sided curvature of the internal fibers of the metal and the formation of loops. When H/D>3 is the buckling of the workpiece during rolling.

When the angle of inclination of the bottom forming a deformable portion of the workpiece to a horizontal plane, a smaller angle of inclination of the generatrix of the valve to a horizontal plane, a gap between the underside of the workpiece and the surface of the matrix at the base of the valve. The metal in the initial stage of deformation is based on the matrix peripheral layers, warping, stretch metal layers at the foot valve. Perhaps the formation of folds, cracks on the surface and in the bulk metal. Possible failure to complete the matrix in the area of the legs of the valve and getting married(insufficient allowance). When the metal rests at the initial deformation of the matrix in areas close to the stem of the valve, and further, when the deformation due to the movement of metal from the center to the periphery of the filling of the matrix around the circuit and provides the minimal allowance under the machining, excludes defects in the transition areas from the feet to the valve plate.

When rolling with the extrusion end surface of the end fibers are moved to the periphery of the valve and the inner layers flowing in the "funnel" (hole) in the center of the matrix, respectively moving the contour surface of the die. This deformation provides the desired fiber direction parallel to the outer contour of the valve, formed by the matrix.

The invention is illustrated by the drawing, which shows a diagram of rolling the billet.

Valve for internal combustion engine made of steel grades type 40XH, HS, 20HN4FA, HAN, SM, HN-VM and other alloyed heat-resistant grades, titanium alloys of the type PT-3V, VT6, VT3, W-14.

A method of manufacturing a valve of the internal combustion engine in the first embodiment is as follows. Before mechanical rolling the workpiece is heated to a length greater than exhibited a deformable part, to 1100-1180oC. Heating the metal volume should be uniform in order to avoid uneven deformation and distortion of the structure. Then the workpiece 1 undistorted part set in the matrix 2, the bottom forming a deformable portion of the workpiece to a horizontal plane , after that, include the drive rotation matrix 2, lead angle =0.5 to 15oto the axis of the matrix 2 raskatnoe the punch 3 and carry out the rolling of the workpiece 1 to the required dimensions, forming the valve plate. After rolling the punch 3 return to its original position. Valve 4 vyrisovyvaet from the matrix ejector 5. The angle of inclination of the generatrix of the valve 4 to the horizontal plane is equal to , and .

The inventive method according to the second variant is as follows. Short rod-shaped workpiece is cylindrical, pre-heated to 1100-1180oWith, set in a matrix with a conical surface in the Central part and the hole, the diameter of which is equal to the diameter of the leg of the valve. Include the drive rotation matrix, lead angle =0.5 to 15oto the axis of the matrix raskatnoe punch and carry out mechanical rollers, forming the valve plate while simultaneously squeezing the legs of the valve in the "point". After rolling the punch returns to its original position, and the valve vyrisovyvaet from the matrix ejector.

The following are specific examples of implementation variants of the proposed method.

Example 1.

In the manufacture of claviscom mechanical rolling, the blank produced by hot stamping in the preparatory stamp having a ratio H/D = 80/62 = 1.3 and the angle of the bottom forming a deformable portion of the workpiece to a horizontal plane =30oestablished in the matrix, turn on the drive rotation matrix, summed angle =2oto the axis of the matrix raskatnoe punch and was carried out by rolling the end of the workpiece, forming the valve plate. Press power 100 T, temperature of the deformable part 1120oC. Learned the valve diameter plates 96.5 mm, the diameter of the legs 30 mm, the angle of the lower generatrix of the valve to a horizontal plane =20othe height of the plates 34 mm, stem length 270 mm

In longitudinal section the obtained valve the fiber direction was parallel to its outer contour.

Example 2.

Cylindrical billet of titanium alloy VT-6 size 5020 mm was heated to a temperature of 1100oC, was placed in a closed matrix with an inner bore diameter of 14 mm, turn on the drive rotation matrix, summed angle =3oto the axis of the matrix raskatnoe punch and has been rolling the billet to extrusion of the rod through the point. The rolling force of 60 TONS. Received keypad longitudinal section obtained valve the fiber direction was parallel to its outer contour.

1. A method of manufacturing a valve of the internal combustion engine, including the installation of a billet in a matrix with receiving the protruding portion of the workpiece and the forming of the valve by mechanical rolling serving deformable part punch set at an angle to the axis of the matrix, characterized in that when you install blanks in the matrix protruding deformable portion to receive a length of not more than three times the diameter of the workpiece and the punch set at an angle to the axis of the matrix, comprising 0.5 to 15o.

2. The method according to p. 1, characterized in that protruding from the matrix of the deformable portion of the workpiece is performed with the angle of the lower generatrix to the horizontal plane, not a smaller angle to the horizontal plane forming the valve.

3. A method of manufacturing a valve of the internal combustion engine, including the installation of a billet in a matrix, made with a hole diameter equal to the diameter of the legs of the valve, and the formation of the valve-mechanical rolling of the workpiece by the punch set at an angle to the axis of the matrix, characterized in that use a matrix with a conical surface in the Central part, and the mechanical era. The method according to p. 3, characterized in that the punch set at an angle to the axis of the matrix, comprising 0.5 to 15o.

 

Same patents:

The invention relates to the field of engineering, namely, technology, forging and stamping parts production valves of reciprocating engines and compressors and can be used in mechanical engineering

The invention relates to the processing of metals by pressure, for the connection of parts through plastic deformation and can be used to obtain the Poppet valves of internal combustion engines

The invention relates to the processing of metals by pressure and can be used in the manufacture of products like shafts direct extrusion and reducing

The invention relates to the processing of metals by pressure and can be used in the manufacture of cold die forging parts type bushing with a flange and a stepped cavity

The invention relates to the processing of metals by pressure and can be used as a stamp for wasteless and low-waste stamping forging

The invention relates to the processing of metals by pressure, in particular a hot stamping hollow products with periodic cross-section of the outer side surface

The invention relates to the field of metal forming and can be used in the manufacture of core components of variable cross section type of studs, bolts, screws, etc

The invention relates to the field of metal forming and can be used in the manufacture of hollow steel parts with outer ring element

The invention relates to the processing of metals by pressure and can be used in the manufacture proposedly rod parts manual form type rivets, buildings thorn, shafts, axles and fingers on cold machines

The invention relates to a hot body stamping parts like flanges, disks, and so on

FIELD: plastic working of metals in different branches of industry.

SUBSTANCE: apparatus includes supporting plate and housing with openings and duct. Punch, upper and lower stops are mounted in housing. Said stops may be in contact with blank by their flat notched surface. Movable lower stop is arranged in openings of housing and on supporting plate; it engages with said plate by its smooth surface. Hydraulic cylinder joined by its rod with lower stop is mounted on supporting plate. Upper stop is in the form of cylinder mounted in housing in such a way that it restricts together with punch inner cylindrical cavity of hydraulic system providing motion of lower stop. Said hydraulic system also includes duct of housing and hydraulic cylinder.

EFFECT: enlarged manufacturing possibilities of apparatus due to increased range of changing relation of shear deformation to compression deformation of blank.

2 dwg

FIELD: plastic metal working, possibly forging variable cross section parts by extrusion in hydraulic presses with movable container.

SUBSTANCE: method comprises steps of feeding heated blank to container; pressing out blank in container by means of pressure pad and extruding part of blank to die of die set; forming forging having constant cross section part and thickened part that is formed after upsetting remaining portion of blank; placing part of die set in container according to condition of joining their planes. Upsetting of remaining portion of blank for forming thickened part of forging is realized in cavity between joined planes of die set unit and container. Said cavity is formed due to moving die set unit relative to container before forming thickened part of forging. Upsetting operation is realized due to simultaneous motion of pressure pad and container.

EFFECT: possibility for making forging with complex outer and inner configurations, simplified assortment of technological tools, enhanced quality of forging.

2 cl, 9 dwg

FIELD: plastic metal working.

SUBSTANCE: invention can be used at plastic shaping of parts by orbital deformation method. Blank is made previously profiled in form of cylinder with ring flange. Dimensions of blank are defined by mathematical expression given in invention. Blank is placed between die and spherodynamic fluctuating deforming module and then is spinned. Ring flange of blank is made for providing its arrangement between die and said deforming module with clearance. Size of clearance between ring flange and die exceeds clearance between ring flange and deforming module by a factor of 10.

EFFECT: provision of deformation resonance in material in process of machining for realizing wave plasticity character in form of rotary modes of plasticity.

2 dwg

FIELD: plastic working of materials, possibly cold plastic deforming of parts with predetermined level of operational characteristics.

SUBSTANCE: method comprises steps of placing blank onto support; end upsetting of blank and then deforming it with punch; subjecting punch to complex motion in the form of circular rolling out at simultaneous cyclic axial rocking; subjecting blank at side of its support to cyclic striking pulses acting along helical path. Due to such complex motion of punch blank is deformed by value consisting of 5 - 7 % of predetermined deformation degree. Then motion of cyclic axial rocking of punch is interrupted and pulse effort is applied to punch at frequency equal to that of forced oscillations of support. Blank is subjected to finish shaping by rolling it out with use of punch without pulse efforts. Invention provides wave nature of plastic deformation, penetration of rotor to nano-level of blank material for forming in it massifs of material of "artificial intellect".

EFFECT: possibility for forming desired operational properties in material of blank.

1 dwg

FIELD: plastic working of materials, possibly cold plastic deforming of parts with predetermined level of operational characteristics.

SUBSTANCE: method comprises steps of placing cylindrical blank in cavity of lower die on sphere-dynamic fluctuation module and resting part by means of pusher; deforming part by rolling-around punch; imparting to said punch and to pusher motion along curves in the form of logarithmic helixes rising in the same direction. It provides realization of wave structure of plastic deformation and obtaining in blank of material zones of "artificial intellect".

EFFECT: possibility for producing parts with desired level of operational characteristics.

1 dwg

FIELD: metallurgy; production of semi-finished products from high-temperature high-alloy wrought nickel-based alloys for manufacture of disks for gas-turbine engines working at temperatures higher than 600°C.

SUBSTANCE: proposed method includes preliminary deformation of blank by upsetting by two or more times, final deformation and heat treatment; first upsetting is performed in closed container; during next upsetting, technological metal ring at temperature of (0.02-0.5)Tdef. is placed on blank heated to deformation temperature Tdef. and free upsetting is performed in stamp tool heated to deformation temperature. Geometric parameters of ring are selected from given relationships. Preliminary deformation of blank is performed at intermediate annealing. Height-to-diameter ratio of starting blanks is no less than 3:1. Proposed method ensures forming of homogeneous fine-grain structure over entire volume of blank due to work in end zones.

EFFECT: simplified procedure; reduced labor consumption.

4 cl, 1 tbl, 5 ex

FIELD: metal working by ultrasonic forging; manufacture of blades at enhanced technical and service characteristics.

SUBSTANCE: edge of plate is placed between taper surfaces of strikers located opposite each other for forming wedge-shaped blade and is subjected to deformation by ultrasonic forging. Plate is moved relative to longitudinal axes of strikers in transversal direction. Strikers connected with ultrasonic oscillation source are rotated about their longitudinal axes with the aid of drive. Taper working surface of each striker has recess whose generatrix corresponds to shape of surface of wedge-shaped blade.

EFFECT: improved quality of tool cutting edge; increased productivity; enhanced wear resistance of fittings.

19 cl, 9 dwg

FIELD: pressure treatment of materials, particularly to obtain parts with predetermined service performance level by cold plastic deforming thereof.

SUBSTANCE: method involves arranging cylindrical billet in matrix interior on shpero-dynamic fluctuation module so that the billet is supported by pusher, wherein the module comprises cavity with main resonator located in the cavity; performing double-sided billet deformation from the opposite directions thereof, wherein from upper billet end the billet is deformed by applying rolling force thereto by means of die, from lower billet end the billet is deformed by applying summary pulsed force of shpero-dynamic fluctuation module and main resonator. Additional resonator is freely installed in module interior to apply additional percussion force to lower billet end during billet deformation.

EFFECT: provision of wavy plastic deformation and creation of "artificial intelligence" zones in billet.

1 dwg

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.

1 dwg

Up!