A method of manufacturing the friction discs
(57) Abstract:A method of manufacturing the friction discs, including installation in a split mold frame drive-through holes, placement on both sides relative to the frame preformed briquettes made of friction material, clamp them to the frame with the provision of the recess of the friction material into the holes of the frame, the heat of the friction material and then removing the product from the mold, characterized in that the briquette at the stage of preliminary molding is performed with G-shaped cross section having an inner contour, equal in size to the outer contour of the frame, and at the final stage of molding carry out the installation of two preformed briquettes in the cavity of the punch and die alignment with the inner contour of the l-shaped briquettes by the external contour of the frame.
FIELD: technological processes.
SUBSTANCE: initial bar with thickness of at least around 20 inches from alloy on the basis of titanium is subsequently subjected to the first forging in the field of beta-phase and the second forging in the field of alpha-beta-phases. After subsequent heating of prepared billet to the temperature in the field of beta-phase the third forging is carried out with temperature from around 1550°F to around 1725°F. At that forging is performed from the first forging thickness of at least 15 inches to the second forging value of not more than 13 inches. For formation of semi-finished item the fourth forging is carried out in closed stamp with temperature from around 1550°F to around 1725°F. Then thermal treatment of semi-finished item is carried out. When manufacturing gas turbine disc after third forging billet is divided into sections with preparation of sectioned billet, which is further laminated.
EFFECT: preparation of large items with uniform fine-grained structure.
17 cl, 3 dwg
SUBSTANCE: invention relates to the metal deformation process and can be used in aircraft and power industry at manufacturing of disks of rotors of gas turbine engines and rotors of turbines of heating and atomic power plants. It is implemented moulding of drafts of stand Then it is implemented forming of blank by means of its distribution and unfolding of wall into flat ring. Wall of sleeve is formed with increasing of thickness from bottom to edge of stand. For disk with rim it is received with flange on wall of sleeve. After moulding it is implemented drawing out on mandrel of sleeve wall. After distribution and unfolding of blank it is implemented final calibration in punch.
EFFECT: ability of receiving of disks from different steels and alloys with specified physical-mechanical properties and structure.
10 cl, 2 dwg, 2 ex
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and may be used in producing discs with ''blisk''-type vanes in isothermal and superplasticity conditions. In compliance with first version, heated billet is placed in isothermal mould comprising container and ceramic shaping elements. Billet is deformed by ball-tipped made die. Note here that vane is shaped by extruding billet material in cavity between shaping elements. Finished disc with vanes is withdrawn from mould by destructing ceramic elements. In compliance with second version, vane is first made and placed in isothermal mould. Note here that vanes are isolated by ceramic inserts while valve butts are arranged between two plates. Both plates and vane butts are deformed together in ball-tipped made die in isothermal and superplasticity conditions. Note here that deformation degree exceeds 20%. Note also that deformation rate makes (10-2 -10-3) s-1.
EFFECT: expanded process performances, higher quality.
14 cl, 2 dwg, 2 ex
SUBSTANCE: ingot is subjected to swaging-drawing to octahedron with total reduction of 1.6-1.7. Final forming is performed at shaped hammers at 4-5 displacements over hammer surface and, then, in closed sizing die. Total reduction ay final forming makes 3-5.
EFFECT: precise forged pieces with homogeneous fine-gram structure, high specific strength and ductility.
2 cl, 2 tbl, 1 ex
SUBSTANCE: deformation of a peripheral part of a billet is performed by rolling with rolls at the superplasticity temperature in the deformation zone so that a sheet is formed. The central part of the billet is cooled down prior to rolling-off to the elastic deformation temperature. During the rolling-off process, the central part of the billet and the sheet subject to non-contact deformation is cooled down by action of a cooling medium on the central part. Cool-down of the sheet to its elastic non-contact deformation temperature is provided in a zone adjacent to the central part. Between the specified zone and the deformation zone, an intermediate zone is formed, in which temperature obtains an average value between elastic deformation temperature and superplasticity temperature and/or values close to the specified average value. In the rolling-off process, cooling medium pressure is increased with expansion of the cooled zone of the sheet. Intermediate zone temperature is maintained.
EFFECT: improving quality of manufactured parts and enlarging technological capabilities of their manufacturing method.
3 cl, 6 dwg, 7 ex
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and can be used for production disc-type parts from multiphase hard-to-strain refractory alloys. Workpiece is heated in the furnace to the temperature corresponding to temperature range of superplastic straining. Workpiece peripheral part is rolled off at superplastic straining made by rolls secured in elongator heads. Forming surface of the rollers is heated to the temperature not lower than that of crack formation on workpiece surface. Rolling-off is performed in the furnace space free of heaters wherein elongator heads are fed to the workpiece. Extending furnace is used provided with the shutter or permanent cutout provided with the shutter. Shutter opening amount is defined proceeding from the maintenance of workpiece temperature not falling beyond aforesaid temperature range of superplastic straining. Rolls are heated with the help of heated workpiece heat radiation.
EFFECT: higher stiffness of elongator heads, hence, higher precision of part production.
7 cl, 2 dwg
FIELD: chemical industry; methods of manufacture of the combined items out of the plastic components.
SUBSTANCE: the invention is pertaining to the method of manufacture of the combined items out of the plastic components, such as collapsible tubes with caps, the containers heads with caps, slewing covers. The method provides for manufacture of the combined items or the components of the items containing integration out of two components movable with respect to each other at least with one degree of freedom, the corresponding surfaces of which envelop partially the molds adding each other so, that they are present in one geometrical configuration and are rigidly connected to each other on the common surface, tightly fitting to each other without a clearance. The method provides for the molding of the first component out of one or several plastic materials by pressure or compression as a result of approach of the first mold and the second mold. The cavity of the second mold contains the indicated common surface. Both cavities connected by both molds limit in the end of the approach the volume of the indicated first component. Remove the indicated second mold. At that the first component remains rigidly connected with the indicated first mold, which afterwards fulfills the role of the support tool. Produce the pills from the certain amount of one or several thermoplastic material. At that the plastic material or the plastic materials, which are not mixed with plastic material or plastic materials located on the periphery of the given pill, are not mixed with plastic material or the plastic materials located on the periphery of the other component. At that the indicated pill is heated up to the temperature exceeding the temperature of the softening point of the thermoplastic material or thermoplastic materials forming it. Place the indicated pill on the surface of the block of the first component rigidly connected with the support tool, or into the cavity of the third mold for a casting. The third mold is mounted opposite to the block of the first component rigidly connected with the support tool. At that the indicated third mold contains the cavity, which during the contact with the indicated block of the first component rigidly connected with the support tool together with the surface of the first component and, if necessary, with the part of the cavity of the support tool limits the volume of the second component. Then approach the indicated blocks of the first component rigidly connected with the support tool and the third mold up to their touch. At that the indicated approach results in the compression of the pill for putting it into the required shape of the second component. Further, conduct removal of the support tool and the third mold and the following removal of the block of both components molded this way. The invention describes one more version of realization of the method. The invention allows to fulfill both components only from the plastic material and to dilate possibilities of selection of plastic material for realization of the second component.
EFFECT: the invention allows to fulfill both components only from the plastic material and to dilate possibilities of selection of plastic material for realization of the second component.
24 cl, 8 dwg
SUBSTANCE: in compliance with the proposed invention, a strip of crude rubber mix made by calendaring or some other way to arrange the polymer molecules longitudinally is wound up on the core perpendicular to its axis and along its generating line. Then the workpiece is formed and vulcanised in the mold providing for uniform simultaneously-all-round molding of the said rubber mix and preventing difference of pressure at the mold plates joint. The proposed mold comprises at least three plates molding the diaphragm, the core for molding internal cavity and directing elements for plates and the core. One of the plates has side members with inclined surfaces on their inner part, located along an axis of the core that make the guides for the other mold plates made so that to allow a uniform simultaneously-all-round molding of the said rubber mix around the core on closing the mold.
EFFECT: higher reliability of diaphragm.
2 cl, 11 dwg
FIELD: process engineering.
SUBSTANCE: forming workpiece from alternating reinforcing and matrix fibers proceeds at temperature above that of binder melting. Said process is started by feeding pressure at temperature varying from matrix fiber heat resistance to complete transversal deformation of workpiece. Thereafter, pressure is reduced to the level sufficient for maintaining the workpiece in deformed state. Simultaneously, temperature is increased to matrix fiber melting point. Now at the same temperature, organoplastic material is cooled to be below heat resistance point of thermoplastic binder.
EFFECT: higher quality and efficiency, improved physical-and-mechanical properties, longer life, efficient and easy production.
2 dwg, 1 tbl, 3 ex
FIELD: machine building.
SUBSTANCE: vulcaniser for energy-saving solidification of multi-layer components 6 for aircrafts consists of open and mechanically sufficiently durable core 7 with layers of coating 8, 9 applied on one side or on both sides. Multi-layer component 6 is enclosed between hold-down piston 1, support bed 2 and side walls 3, 4 of the vulcaniser forming essentially closed internal space 5. At least one layer of coating 8, 9 and/or core 7 contains solidificated thermo-reactive plastic material. By means of transport facility 20 heated air 16 is let through core 7 of multi-layer component 6 in the closed circuit of heated air and ensures energy-saving interior solidification of multi-layer component. Heated air 16 has temperature controlled by means of heater 22. If there is implemented an open circuit of heated air, there is facilitated recuperation of heat by means of heat exchanger 28. Specified parametres of solidification inside core 7 of multilayer component 6, particularly pressure of solidification P, as well as temperature of solidification T can be regulated depending of system of resins used for fabrication of multi-layer component 6 by means of the vulcaniser.
EFFECT: reduced consumption of energy at solidification of component in autoclave.
12 cl, 2 dwg
FIELD: process engineering.
SUBSTANCE: proposed base material with reinforcing fibre has interlacing of reinforcing fibres arranged parallel in one direction, and ordered additional fibres. Length L of additional fibre in, one opposite direction crosses reinforcing fibre thread. The latter features width H and angle θ in one plane interrelated as defined by formulase L=H/cos θ and 3°≤θ≤30°. Note also that adhesive resin with vitrification temperature Tv of 0°C to 95°C is attached to the surface of unidirectional base material with reinforcing fibre on, at least, its one side. Note that amount of adhesive resin varies from 2 g/m2 to 40 g/m2 and said resin is attached at points, lines or intermittent lines. Invention covers also laminar material, moulded plastic product based on base material with reinforcing fibre and methods of their production.
EFFECT: better mechanical properties and higher process efficiency.
20 cl, 8 dwg, 5 ex
FIELD: process engineering.
SUBSTANCE: method of producing 3D objects by laser sintering whereat object is produced by IR-radiation curing layer by layer at locations of each layer corresponding to object. In compliance with this method, image of IR radiation emitted by applied powder layer is locally detected to obtain IR radiation image. Note here that IR radiation image is detected by means of infrared chamber. Defects and/or geometrical imperfections in powder layer are revealed by means of IR radiation image.
EFFECT: higher quality of produced object thanks to better quality control in production process.
9 cl, 9 dwg