The method of forging metallic blanks on the crimp of the forging machine, hydraulic clamp forging machine for its implementation and pumping plant for forging hydraulic swaging machine
(57) Abstract:The inventive method of forging billets provides two modes. Mode roughing forging is conducted with a long-stroke Boykov at low frequency moves. In the mode of finishing forging is conducted with a short stroke of the heads when the frequency of moves. Hydraulic forging machine for implementing the method includes mechanisms for adjusting the stroke of the heads. Each mechanism is in the form of a pump with variable volume working chamber. The means for regulating the volume of the working chamber contains at least one additional plunger, which in one extreme position is located in the working chamber and connected with the main plunger. In another embodiment, the means for regulating the volume of the working chamber is made in the form of additional cameras with the plunger. Secondary camera is located coaxially with the working chamber. Additional plunger placed in the chamber and is inextricably linked with the main plunger. 3 S. and 3 C.p. f-crystals, 3 ill. The invention relates to the processing of metals by pressure and can be used for crimping the metal of the workpieces on the hydraulic radial forging machines.Investmoscow at low frequency passages, and on the other with a short stroke of the heads when the frequency moves 
Known hydraulic clamp forging machine containing the drive motor and jaunty installed on the moving parts of the power cylinder and associated with the appropriate mechanisms to adjust the size of their progress 
Known pump unit for a hydraulic crimping machine, containing a working camera placed in her main plunger associated directly with the chamber of the power cylinder forging machines, on the movable part of which is fixed firing pin 
The disadvantage of this method is to use each mode forging hydraulic forging machines of two types corresponding to each mode characteristics. Machines with long stroke Boykov do a small amount of shock Boykov per minute, whereas cars with short stroke produced a significantly higher number of beats per minute. When this hydraulic forging machines contain a pump unit with a constant supply and their impact frequency Boykov unchanged. Blow frequency changes slightly when the number of revolutions of the pump, but it is insufficient to support a wide range of frequent changes is n two types, the characteristics of each of which correspond to only a particular mode of forging, the inability to use one of the forging machine for rough and finish machining of workpieces, as well as the lack of differentiation of the volume of the working chamber known pump installation, reduces economic indicators as a technology of forging process and hydraulic forging machines in General, and the pump unit in particular.The technical result of the invention is to improve the economic performance of the method and equipment for its use, and to increase their technological and operational capabilities.This is achieved in that in the method of forging metallic blanks on the crimp of the forging machine, including strain strikers in two modes forging, one of which compression is performed with long-stroke Boykov at low frequency of moves, and on the other with a short stroke of the heads when the frequency of moves, according to the invention a long course of strikers at low frequency of moves used in mode roughing blanks, and short stroke Boykov when the frequency of moves used in mode shestovikov mode roughing in a fourfold value.The technical result is also achieved by the fact that in forging hydraulic swaging machine containing the drive motor and jaunty installed on the moving parts of the power cylinder and associated with the appropriate mechanisms to adjust the size of their progress, according to the invention the control mechanism of stroke Boykov made in the form of pumps with variable volume working chambers, and the drive motor is arranged to work in double-speed mode.The technical result is also achieved by the fact that the pump unit hydraulic crimping forging machines, containing working chamber placed in her main plunger associated directly with the chamber of the power cylinder forging machines, on the movable part of which is secured the die according to the invention provided with a means at least two-stage regulation of the volume of the working chamber.The means for regulating the volume of the working chamber may be in the form of at least one additional plunger having two extreme positions, mounted with possibility of accommodation in one of its extreme positions in the working chamber and interact with the main plunger.In Fig.1 shows a pump with variable volume working chamber; Fig.2-3 is the same, in different versions.Hydraulic clamp forging machine includes a pump 1 with the working chamber 2 in which is placed the main plunger 3, which is driven from a drive motor 4 by means of a crank mechanism 5.The working chamber 2 is directly connected with the chamber of the power cylinder forging machines highway 6, and the drive motor 4 is arranged to work in double-speed mode.To change the volume of the working chamber 2 of the pump 1 is provided by means of at least two-stage regulation of the volume of the working chamber made in the form, for example, an additional plunger 7 having two extreme positions. In one of the last provisions of the additional plunger 7 is placed in the working chamber 2 and is connected with the main plunger. The volume of the working chamber in this case is reduced to a value, which is located outside the volume of the working chamber, the value of which will be the maximum. The position of the additional plunger 7 controls the drive cylinder 8 connected to the main tank 9.One use of the invention, shown in Fig.2, implies the presence of two or more plungers, each of which has the ability to interact with the main plunger 3.Additional plungers can be independent and to be circumferentially or axially.In Fig. 2 shows a variant of the axial location of additional plungers 7 and 10. Each additional plunger has a corresponding control unit position, including, for example, rack-and-pinion clutch 11 and the elastic element 12.The means for regulating the volume of the working chamber can be performed (Fig. 3) in the form of at least one additional chamber 13, which is located coaxially with the main chamber 2 and independently of it. The main plunger 3 is located in the working chamber 2, and an additional plunger 7, is inextricably linked with the main plunger, the additional working chamber 13. Additional working chamber is connected with the power cylinder forging machines highway 14.
FIELD: plastic working of metals, possibly free forging of blanks such as ingots by means of flat strikers in hydraulic forging presses, forging hammers, forging machines.
SUBSTANCE: method comprises steps of feeding blank in pair of flat strikers and reducing it due to realizing single reducing operations of its parts by two passes. At first pass single reduction of each part of blank is realized while orienting blank by inclination angle relative to forging axis. At second pass before reducing each part of blank, position of blank axis is changed due to placing it in position symmetrical to its position of first pass relative to forging axis.
EFFECT: enhanced quality of metal of forging, conversion of dendrite large-grain structure to small-grain one, minimal anisotropy of mechanical properties at low factor of forging reduction ratio, increased efficiency, lowered number of metal heating steps at forging.
4 cl, 8 dwg, 3 ex
FIELD: plastic working of metals, possibly at isothermal deforming.
SUBSTANCE: apparatus includes die set unit, heating device and heat insulation unit. Die set unit includes upper and lower plates for supporting upper and power parts of die set respectively. Heating device includes sections formed by electric current conducting plates mutually connected through resistance members. Heat insulation unit includes stationary and detachable portions. Stationary portion includes sheet casings mounted in such a way that space between them is filled with heat insulation material. Sheet casings turned to resistance members are in the form of set of sheets placed with superimposing in slit grooves of insulators. The last are fixed to lower and (or) upper electric current conducting plates. Sheet casings may be bent to side opposite relative to resistance members.
EFFECT: improved design of apparatus.
2 cl, 2 dwg
FIELD: plastic metal working; manufacture of critical parts in aviation and mechanical engineering.
SUBSTANCE: proposed method includes heating the alloy and deforming it during several passes till deformation reaches at least 50%. Then, alloy is heated during at least one pass of deformation to temperature T which is found from the following relationship Tdis≤T≤Tsol, where Tdis is temperature of dissolving of hardening phases and Tsol is temperature of solidus. Alloy is held at this temperature for at least 30 h.
EFFECT: improved service characteristics of articles.
SUBSTANCE: invention relates to production of forgings of high alloy nickel-based steels and alloys which are difficult to form. According to proposed method, ingot is placed without preliminary roughing into furnace heater up to 400. Ingot is heated in heating furnace first to 600±10°C at rate not exceeding 50°C/h and is held at this temperature for 1.5-2.5 h. Then ingot is heated to 700±10°C at rate of 50°C/h maximum and is held at this temperature for 0.8-1.2 h. Heating of ingot to forging temperature of (1150-1180)±10°C is carried out at any rate, and ingot is held at this temperature for 3-5 h.
EFFECT: increased yield of ready metal and getting of fine-grained structure, provision of high level of mechanical properties and adaptability to further processing of forgings.
4 cl, 1 ex
FIELD: plastic metal working, possibly by isothermal deforming.
SUBSTANCE: apparatus includes die unit, heating device and heat insulation unit. Heating device includes two sections arranged at both sides of die unit and bridge. Each section includes upper and lower electrically conducting plates electrically connected one to other through lamellae. Said sections are electrically connected in series; bridge is arranged outside heat insulation unit. Apparatus may have members for fixing electrically conducting plates. Several fixing members provide possibility for moving electrically conducting plates.
EFFECT: uniform heating of die set, lowered metal consumption for communications.
2 cl, 4 dwg
FIELD: plastic working of metals, possibly radial forging of ingots and blanks.
SUBSTANCE: method comprises steps of forging heated blank in one set of strikers mounted in simultaneously moving holders at deformation degree 30 - 90%. Forging process includes individual procedures of squeezing blank, feeding and tilting it. Individual squeezing procedures are realized by depth whose value is determined according to given relation. Method is performed in apparatus having strikers with working surface formed by several planes; holders of upper and lower strikers with inclined sliding faces relative to which inclined sliding faces of holders of lateral strikers are moved. Lateral strikers are coupled with holders of upper and lower strikers through eight guides with П-shaped cross section. Strikers have cross sections with working portions in the form of isosceles trapezium. Forming lock joint inner faces of П-shaped guides and embraced by them faces of holders of strikers are inclined by angle 0 - 170° relative to mounting plane of guide to striker holder.
EFFECT: improved efficiency and quality of forging, improved wear resistance of tools.
6 cl, 10 dwg, 1 ex, 3 tbl
FIELD: plastic working of metals, namely methods for producing forged products with elongated axis from ingots and preliminarily deformed billets in forging presses of four-striker forging apparatuses.
SUBSTANCE: method comprises steps of squeezing billet at four sides, feeding it and tilting; changing feed value of billet after each pass (increasing or decreasing it). Forging operation during odd passes beginning from first one is realized at percentage feed value exceeding that of even passes at satisfying next relations: S1 /h1 = 1.2 - 6.5; S2/h2 = 0.5 - 1.1, where S1,S2 - absolute feed value of blank for odd and even passes respectively; h1, h2 - size of cross section area of blank before squeezing it during odd and even passes respectively.
EFFECT: enhanced quality of metal, increased efficiency of forging.
1 ex, 1 tbl
FIELD: plastic working of metals, namely processes for making forged products with square or rectangular cross section in forging presses.
SUBSTANCE: method comprises steps of preliminary radial forging of ingot; further final forging of formed blank. Preliminary forging is performed with use of four strikers in four-striker forging apparatus of forging press while providing additional macro-shears of metal in cross plane of blank and with deformation degree no less than 7% at each squeezing. At process next relation is satisfied: F = (1.1 - 3.0)F1 where F and F1 - surface area of forged piece respectively. Final forging is performed with use of two strikers in forging press for forming forged piece with desired cross section.
EFFECT: improved quality of metal, simplified forging process.
2 ex, 1 tbl
FIELD: plastic working of metals, namely manufacture of shaped blanks of axles of undercarriage of rolling stock.
SUBSTANCE: method comprises steps of making rough blank from ingot; then forging rough blank for making shaped blank. Rough blank is forged during several passes. Forging operations for making rough blanks and forging operation for making shaped blank are realized in four -striker forging apparatus by squeezing at shear deformations in cross plane of blank during each single squeezing. Single squeezing stages during first three forging passes at making rough blank are realized at displacing metal between strikers and then squeezing said portions of blank in radial direction. Four-side radial squeezing operations are realized for making shaped blank.
EFFECT: improved efficiency of method.
1 tbl, 1 ex