EP0144981A2 - Procédé et dispositif pour le forgeage de vilebrequins sur des presses - Google Patents

Procédé et dispositif pour le forgeage de vilebrequins sur des presses Download PDF

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Publication number
EP0144981A2
EP0144981A2 EP84114859A EP84114859A EP0144981A2 EP 0144981 A2 EP0144981 A2 EP 0144981A2 EP 84114859 A EP84114859 A EP 84114859A EP 84114859 A EP84114859 A EP 84114859A EP 0144981 A2 EP0144981 A2 EP 0144981A2
Authority
EP
European Patent Office
Prior art keywords
crank
base frame
forged
working stroke
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84114859A
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German (de)
English (en)
Other versions
EP0144981A3 (en
EP0144981B1 (fr
Inventor
Rut Prof. Dr. Eng. Tadeusz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Instytut Obrobki Plastycznej
Original Assignee
Instytut Obrobki Plastycznej
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Publication date
Application filed by Instytut Obrobki Plastycznej filed Critical Instytut Obrobki Plastycznej
Publication of EP0144981A2 publication Critical patent/EP0144981A2/fr
Publication of EP0144981A3 publication Critical patent/EP0144981A3/de
Application granted granted Critical
Publication of EP0144981B1 publication Critical patent/EP0144981B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/08—Making machine elements axles or shafts crankshafts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/17—Crankshaft making apparatus

Definitions

  • the invention relates to a method for forging crankshafts on presses, in which, during the working stroke of the press, the heated rod section to be forged is clamped at two points spaced apart from one another, and the part of the rod section located between these points in the axial direction of the rod is compressed, and at the same time bent and displaced transversely to this axis, the compression speed being greater than the bending speed at the beginning of the working stroke, whereas the compression speed is smaller than the displacement speed at the end of the working stroke, and a device for carrying out the method from a base and a head piece arranged above this underframe and movable back and forth in the direction of this frame, two mutually coupled movable tool holders being arranged in the space between the head piece and the underframe, which are perpendicular to the headpiece or are guided obliquely to its direction of movement and which are coupled to the underframe by means of a parallelogram guide consisting of articulated levers, tools serving for the design of the crank cheek, bearing journal and crankpin fast
  • a method for forging crankshafts on presses in which the heated rod section to be forged is clamped at two points spaced apart from one another, and the part of the rod section located between these clamped parts is compressed in the axial direction of the rod and at the same time transversely to this axis is bent and displaced, the compression speed being greater than the bending speed at the beginning of the working stroke, whereas the compression speed is smaller than the displacement speed at the end of the working stroke.
  • this known method has always been used to deform an entire crank offset, that is to say. two crank arms and a crank pin connecting them, during a working stroke of the press.
  • the compressed material is simultaneously bent in the direction of the anvil by the bending tool.
  • the rate of bending increases in proportion to the rate of upsetting as the bit progressively bends to displace the crank pin material with respect to the adjacent bearing cone material passes.
  • both crank cheeks are formed.
  • the known methods and devices are not suitable for forging long-stroke crankshafts, especially for high-performance ship engines, since the ratio of the length of the rod section to be compressed between the end faces of the upsetting tools to the diameter of this rod should have large values.
  • the length of this section depends on the volume of the material required for forming the entire crank stroke (its two crank cheeks and the crank pin). There is therefore a risk of exceeding the permissible degree of slenderness during upsetting. Such an overshoot can cause an incorrect shape of the crank webs and in particular an irregular metal fiber course in the crankshaft.
  • the currently largest forging presses have a pressing force of approx. 80 to 120 MN.
  • Monoblock crankshafts with a maximum stroke of approximately 1200 mm can be forged on such presses using the methods mentioned above. This limitation results from the required pressing force as well as from the space available between the ram and the table, as well as between the columns of the press.
  • the largest crankshafts of heavy marine engines on the other hand, have a stroke of up to 2950 mm. There is, for the time being, no possibility of forging monoblock crankshafts with a stroke of more than 1200 mm.
  • the long-stroke crankshafts mentioned above are therefore manufactured as built or semi-built shafts, the parts of which are connected by shrink-fitting.
  • the monoblock crankshafts have the advantage in comparison with half-built and built shafts that because of their smaller size, smaller and lighter engines can be built.
  • half-built crankshafts have therefore been replaced by shafts in which individual crank bends forged with half-long journals are combined with one another by welding.
  • welding is very time-consuming and complex, requires very precise control of the weld seam, etc.
  • the object on which the invention is based is therefore to design the method and the device of the type mentioned at the outset in such a way that a considerably smaller force is required for the forming and there is no risk of exceeding the permissible degree of slenderness during upsetting in the first forging phase.
  • the device for performing the method according to the invention differs from the known devices for forging monolytic crankshafts in that, according to the invention, only a single pair of such mutually coupled movable tool holders is provided, an additional pair of tool holders, which is immobile during the working stroke, being rigidly attached to the underframe, which is equipped with a clamping mechanism that closes this pair of tool holders and, in addition to the tools used to design the crank cheek, bearing journal or crank pin design, such tools are also arranged in this immovable tool holder pair which are used to determine the mutual angular position of adjacent crank cheeks in the crankshaft.
  • the compression force can be approximately calculated on the basis of the following equation: where N P , ⁇ and g have the meaning given above.
  • the compressive force is therefore twice as large as in the known designs. Presses with a correspondingly lower pressing force can therefore be used for forging.
  • a second major advantage of the device according to the invention resides in the fact that it can be installed in presses with a relatively small working space.
  • the base frame consists of two U-shaped longitudinal beams, the upper arms of each of these longitudinal beams being mutually connected by a tie rod and the two longitudinal beams being connected to one another with crossbeams, one of which is articulated to the articulated lever, which form a parallelogram with the base and the movable tool holders, while the second crossbar forms the lower part of the additional immovable tool holder pair.
  • the clamping mechanism closing the additional immovable tool holder pair consists of at least one hook which is articulated on the underframe and, when closed, is supported on a half-roller which is rotatably mounted in the upper part of the additional immovable tool holder pair.
  • the tool used to determine the angular position of adjacent crank webs is divided and consists of an upper part and a lower part, a recess with peripheral recesses being provided in this tool, which are adjacent to the circumference of the recess according to the required angular positions Crank cheeks of the crankshaft are distributed and a straightening plate with a recess for aligning the bearing or crank pin is arranged in the desired position in this recess.
  • the device is a head piece with vertical guide surfaces, which abut against vertical guide surfaces which are arranged on the base frame during the working stroke.
  • the use of the device is more convenient if the upper part of the additional immovable tool holder is equipped with a hook claw which connects it to the head piece during its lifting.
  • the method and the device according to the invention are intended for forging one-piece crankshafts with several cranks.
  • the device is also suitable for reshaping individual crank offsets for semi-assembled crankshafts. It is also possible to forge individual crank webs which have half pins at both ends.
  • the crankshaft can be built from such crank webs by welding the half journals together.
  • the device according to the invention can either be installed in a forging press, in which case the head piece is fastened to the press ram and the base frame is supported on the press table, or it can be equipped with its own drive.
  • the device is installed in a press with a press table 1 and a vertically moving ram 2. wherein the head piece 3 is attached to the plunger 2, and on the press table 1, the side members 4 of the underframe are supported.
  • the head piece 3 has horizontal guide surfaces 3a on which an upper tool holder 5 is guided.
  • the head piece also has vertical guide surfaces 3b, which bear against vertical guide surfaces 4a on the side members.
  • the lower ends are articulated to the lower frame by four articulated levers, of which the two outer in the drawing with 6 and the other two inner articulated levers, which are arranged closer to the center of the device, are designated by 7.
  • the upper ends of the articulated levers 6 and 7 are articulated on the lower tool holder 8 and form a parallelogram guide with it and the underframe.
  • the lower tool holder 8 has a driver 8a, which couples it to the upper tool holder 5.
  • the tool holders 5 and 8 together form a mutually coupled pair of tool holders.
  • the lower tool holder 8 is additionally connected to the frame by means of tabs 9.
  • the upper half 10 of a divided tool for clamping the material to be forged is fastened in the upper tool holder 5.
  • the lower half 11 of this tool is fastened in the lower tool holder 8.
  • the device is equipped with an additional immovable lower tool holder.
  • the lower part 12 of this tool holder is arranged between the longitudinal beams 4 and at the same time forms a cross member connecting the said beams.
  • a recess 12a for inserting tools is formed in part 12.
  • 4 recesses 4d are made in the longitudinal beams for inserting tools, which will be explained in more detail.
  • An additional upper tool holder 13 is also provided in the device. This upper tool holder 13 forms, together with the lower tool holder, which consists of the part 12 and the recesses 12a and 4d, an additional pair of tool holders which is immobile during the working stroke.
  • the additional upper tool holder 13 is not permanently connected to the head piece, but can be hung on it when the device is opened. This he facilitates the operation of the device when inserting the raw rod and when removing the forgings. During the working stroke, the additional tool holder 13 is completely independent of the head piece 3.
  • the second upper tool holder 13 has on its side surfaces projections 13a, in which two half-rollers 15 are rotatably mounted, on which the hooks 14 press when the device is closed.
  • the additional upper tool holder 13 is equipped with a drawstring 16, which is used for hanging on the plunger 2.
  • the hook claw 13b and the drawstring 16 facilitate the handling of the second upper tool holder 13 when the device is opened.
  • the tool used to fix the mutual angular positions of the adjacent crank webs is arranged.
  • This tool consists of three parts. Its lower part 17 is held in the additional lower tool holder 12, 12a, 4d. Its upper part 18 is fastened in the additional upper tool holder 13.
  • a recess 19 is made in these two assembled parts.
  • a recess 19a is made on the circumference of the recess 19, the center of which lies in the vertical plane of symmetry of the device.
  • the recess 19a is used for forging the second crank arm of each crank crank.
  • FIG. 12 shows that for a shaft with seven offsets, and in FIG. 14 for a shaft with eight offsets.
  • the third part of the tool for establishing mutual angular positions of the adjacent crank webs in the forged crankshaft is formed by a straightening plate 20 which has a recess 20a on the circumference.
  • the straightening plate 20 has two surfaces 20b, each of which has the shape of a truncated cone segment.
  • the straightening plate is rotatably mounted in the recess 19.
  • a split tool is provided for reshaping the crank webs, the upper part 21 of which is arranged on the end wall of the upper movable tool holder 5.
  • the lower part 22 of this tool is fastened in the additional lower tool holder 12, 12a, 4d.
  • the end face 21a of the upper tool part 21 and the end face 22a of the lower tool part 22 have the shape of truncated cone segments.
  • a second tool 23 is arranged in the second upper tool holder 13, which serves for clamping the material 24 to be forged and as a counter tool for the upper working surface 22b of the lower tool part 22.
  • the base of the device consists of two long beams 4 between which two cross members 25 and 2 are arranged, the second cross member simultaneously forming the lower part of the additional tool holder.
  • Both the cross member 25 and the lower part 12 of the second tool holder have side projections, which are designated in FIG. 6 with 25a and in FIG. 1 with 12a. These projections engage in corresponding recesses in the side members 4. The whole is clamped together with transverse screws 26.
  • Each side member has a U-shaped outline. Its upper arms are connected to one another with a double-T-shaped tie rod 27, the central part 27a of which is parallel to the longitudinal beam 4 and engages in longitudinally extending recesses in the upper arms of the longitudinal beam.
  • the guer extending end parts 27b of the tie rod are supported on the end faces 4b and 4c of the side member 4.
  • the device works.
  • the press ram is raised into its chere position.
  • On the hook claw 3c of the head is.
  • the lower tool holder 8 and the upper tool holder 5 are pushed all the way to the left using hydraulic cylinders, not shown in the drawing.
  • the articulated levers 6 and 7 are inclined to the right to the vertical, ie in the direction of the additional lower tool holder 12, 12a, 4d.
  • the hooks 14 are pivoted to the right.
  • the lower part 20 c of a divided straightening plate which is a clamp for the right end part of the to be forged material.
  • the upper part 20d of this divided straightening plate is placed on the upper part 18 of the tool used to set mutual angular positions of the crank webs.
  • the preheated raw rod 24 is placed on the lower part 11 of the divided clamping tool for the material, as well as on the lower part 22 of the forging tool and on the lower part 20c of the straightening plate.
  • the press table with the lower parts of the device is pushed into the press.
  • the press is started. As soon as the tool 23 and the upper part 20d of the straightening plate touch the raw rod, the press is shut down and the hooks 14 are pivoted to the left. They then press on the half-rollers 15, which are rotatably mounted in the projections 13a of the second upper tool holder. As a result, this tool holder 13 is pressed against the lower tool holder 12, 12a, 4d.
  • the press is started again, whereby the raw rod 24 comes into contact with the tools 10 and 21, so that its left part is clamped.
  • the device is now closed and the raw rod is clamped on both the left and the right side.
  • the lower tool holder 8 is coupled to the upper tool holder 5 by its driver 8a.
  • the second upper tool holder 13 is thus automatically released from the head piece 3 and the drawstring 16 can be removed.
  • the articulated levers pivot to the right, as a result of which the lower tool holder 8 together with the coupled upper tool holder 5, which is mounted on the horizontal guide surfaces, is displaced to the right.
  • the rod section arranged between the end faces of the tools 11, 21 and 22, 23 is compressed and simultaneously bent, which is shown in FIG. 21.
  • the vertical guide surfaces 3b of the head piece 3 slide on the vertical guide rails 4a of the base frame and take over the frictional forces which arise on the horizontal guide surfaces 3a when the upper tool holder 5 is displaced.
  • the hooks 14 are pivoted to the right with hydraulic cylinders, not shown in the drawing.
  • the press ram 2 is returned until the hook claws 3c and 13b interlock.
  • the press is stopped in this position.
  • the tension band 16 is stretched between the upper tool holder 13 and the plunger 2, after which the plunger is returned to the stop.
  • the forging is removed from the device.
  • the tool holders 5 and 8 are returned to their left position with hydraulic cylinders, not shown in the drawing.
  • the correspondingly heated forging which was obtained in the first working stroke, is inserted into the device in a manner similar to that just described, with the difference that the pin arranged at the beginning of the first crank arm is inserted into the lower recess 19a .
  • the leveling plate 20 is now inserted so that the crank pin hits the recess 20a.
  • the further forging process is analogous to forging the first crank arm. You get a shaft with a crank crank.
  • the second cheek of this crank is forged analogously to the second cheek of the first crank.
  • crankshafts in which all bearing journals and crank journals have the same dimensions, since they can be successively forged in the same tools. This requirement only concerns the forging itself.
  • the finished crankshaft after machining can have differently dimensioned crank and shaft journals. But you can also forge crankshafts in which the bearing journals and crank journals have different dimensions. However, a larger range of tools is required for this.
  • a major advantage of the device is that it has two assemblies of different sizes, only the dimensions of the smaller ones being limited by the size of the working space in the press.
  • the first assembly is arranged in the drawing on the left side of the device and is located between the press ram 2 and the parts 4 and 25 of the underframe.
  • This assembly is smaller (height h in Fig. 7) and contains the device parts that are movable during the working stroke, i.e. the head piece and only a pair of the coupled tool holders 5 and 8, one of which is guided on the guide surfaces 3a in the head piece 3 is, while the second is articulated with articulated levers 6 and 7 on the underframe.
  • the left part of the raw rod 24 is clamped in the tools 10 and 11 fastened in these tool holders 5 and 8.
  • the second assembly of the device is higher (height h in Fig. 7). This assembly lies outside of the perpendicular between the head piece 3 and the other right parts of the base existing space. It contains the parts of the device which are immobile during the working stroke, namely the additional tool holders 12, 12a, 4d, 13 with the tools 22, 23, 17, 18 and 20 fastened in them, which are used for shaping the crank web and for defining the angular position of adjacent crank webs serve.
  • the forged parts of the crankshaft are also included in the second assembly.
  • This second assembly is not in the work area of the press, so its height h is not limited by the height of the work area.
  • the crank arm can therefore be reshaped outside the space between the head piece and the base. This makes it possible to forge long-stroke crankshafts on presses whose working space is relatively small.
  • crankings can be produced with the same tool 17, 18 and 20 for determining the angular position of adjacent crank webs.
  • the straightening plate 20 of this tool can be used to forge all crankshafts of the same type, apart from the number of crankings, in the crankshaft. This limits the number of tools used, which reduces production costs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP84114859A 1983-12-13 1984-12-06 Procédé et dispositif pour le forgeage de vilebrequins sur des presses Expired - Lifetime EP0144981B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL245115 1983-12-13
PL1983245115A PL141712B1 (en) 1983-12-13 1983-12-13 Method of and apparatus for press forging of crankshafts

Publications (3)

Publication Number Publication Date
EP0144981A2 true EP0144981A2 (fr) 1985-06-19
EP0144981A3 EP0144981A3 (en) 1987-08-19
EP0144981B1 EP0144981B1 (fr) 1991-06-19

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ID=20019632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114859A Expired - Lifetime EP0144981B1 (fr) 1983-12-13 1984-12-06 Procédé et dispositif pour le forgeage de vilebrequins sur des presses

Country Status (9)

Country Link
US (1) US4646551A (fr)
EP (1) EP0144981B1 (fr)
JP (1) JPS60145233A (fr)
CA (1) CA1228253A (fr)
CS (1) CS273158B2 (fr)
DE (1) DE3484732D1 (fr)
ES (1) ES8600707A1 (fr)
PL (1) PL141712B1 (fr)
SU (1) SU1440333A3 (fr)

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CN101844198A (zh) * 2009-03-27 2010-09-29 本田技研工业株式会社 曲轴的制造装置和制造方法
CN102548684A (zh) * 2010-09-17 2012-07-04 丰田自动车株式会社 曲轴的制造方法及曲轴的制造装置
CN102886478A (zh) * 2011-07-21 2013-01-23 张德崑 多功能液压机

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US5493761A (en) * 1994-10-24 1996-02-27 Ingersoll Cm Systems, Inc. Apparatus for fillet rolling of crankshafts
PL187876B1 (pl) * 1999-03-05 2004-10-29 Inst Obrobki Plastycznej Urządzenie do kucia przez spęczanie
DE60144109D1 (de) 2000-11-22 2011-04-07 Ingersoll Cm Systems Inc Vorrichtung und verfahren für das walzen von werkstücken
JP2007522505A (ja) * 2004-02-17 2007-08-09 イッシャー ペーター 打楽器、特にドラム又はティンパニー
CN100513003C (zh) * 2005-03-21 2009-07-15 崔怀旭 曲轴弯曲镦锻专用液压机
US8870655B2 (en) * 2005-08-24 2014-10-28 Nintendo Co., Ltd. Wireless game controllers
WO2015075924A1 (fr) * 2013-11-21 2015-05-28 新日鐵住金株式会社 Procédé de production d'un vilebrequin forgé
MX367834B (es) * 2013-11-21 2019-09-05 Nippon Steel Corp Método para producir un cigüeñal forjado.
CN106061647B (zh) * 2014-02-27 2018-06-08 新日铁住金株式会社 四汽缸发动机用锻造曲轴的精锻用坯料的成形装置及使用了该装置的锻造曲轴的制造方法
CN114160727A (zh) * 2021-12-27 2022-03-11 通裕重工股份有限公司 一种大型四爪吊钩类锻件锻造方法

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US2534613A (en) * 1944-12-07 1950-12-19 Cie Forges Et Acieries Marine Apparatus for forging parts showing important variations in their cross section
US2535295A (en) * 1946-07-05 1950-12-26 Cie Forges Et Acieries Marine Forging apparatus
US2999298A (en) * 1959-02-09 1961-09-12 Loire Atel Forges Apparatus for forging a crankshaft or similarly shaped part
FR1534873A (fr) * 1967-06-21 1968-08-02 Loire Atel Forges Procédé pour le forgeage d'ébauches constituées de plusieurs volumes non coaxiaux et dispositif à deux degrés de liberté pour la mise en oeuvre dudit procédé
DE1301297B (de) * 1964-09-02 1969-08-21 Ts Lab Obro Bki Plastycznej Vorrichtung fuer das Stauchen laenglicher Werkstuecke auf Pressen
GB1207236A (en) * 1967-06-21 1970-09-30 Loire Atel Forges Improvements in or relating to a device for and methods of forging blanks consisting of several non-coaxial volumes
SU583866A1 (ru) * 1975-07-30 1977-12-15 Челябинский Политехнический Институт Им.Ленинского Комсомола Способ изготовлени деталей типа коленчатых валов
EP0003139A1 (fr) * 1978-01-14 1979-07-25 Instytut Obrobki Plastycznej Procédé, produit brut et dispositif pour le forgeage d'un arbre de manivelle
DE1936012C2 (de) * 1968-07-19 1984-06-14 Creusot-Loire, Paris Vorrichtung zum Schmieden von Kurbelhüben in einer vertikal wirkenden Schmiedepresse

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US2827685A (en) * 1952-07-24 1958-03-25 English Steel Corp Ltd Apparatus for forging crank-shafts and like work-pieces
GB757526A (en) * 1953-11-23 1956-09-19 Loire Atel Forges Improvements in or relating to apparatus for forging crank-shafts
US3129488A (en) * 1960-05-20 1964-04-21 Schloemann Ag Progressive forging of multi-throw crankshafts
US3348407A (en) * 1963-10-02 1967-10-24 Ts Lab Obrobki Plastycznej Device and particularly forging apparatus for simultaneous upsetting and bending of material like bars, rods or ingots
US3688552A (en) * 1970-06-19 1972-09-05 Forges De La Loire Comp D Atel Apparatus for forging crankshafts and like parts
PL82101B1 (fr) * 1971-07-31 1975-10-31
PL102814B1 (pl) * 1975-03-15 1979-04-30 Instytut Obrobki Plastycznej Sposob kucia wykorbien pojedynczych walow polskladanych,urzadzenie do kucia,zwlaszcza kucia wykorbien pojedynczych walow polskladanych i przyrzad do speczania zwlaszcza przedkuwek pojedynczych wykorbien walow polskladanych

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534613A (en) * 1944-12-07 1950-12-19 Cie Forges Et Acieries Marine Apparatus for forging parts showing important variations in their cross section
US2535295A (en) * 1946-07-05 1950-12-26 Cie Forges Et Acieries Marine Forging apparatus
US2999298A (en) * 1959-02-09 1961-09-12 Loire Atel Forges Apparatus for forging a crankshaft or similarly shaped part
DE1301297B (de) * 1964-09-02 1969-08-21 Ts Lab Obro Bki Plastycznej Vorrichtung fuer das Stauchen laenglicher Werkstuecke auf Pressen
FR1534873A (fr) * 1967-06-21 1968-08-02 Loire Atel Forges Procédé pour le forgeage d'ébauches constituées de plusieurs volumes non coaxiaux et dispositif à deux degrés de liberté pour la mise en oeuvre dudit procédé
GB1207236A (en) * 1967-06-21 1970-09-30 Loire Atel Forges Improvements in or relating to a device for and methods of forging blanks consisting of several non-coaxial volumes
DE1936012C2 (de) * 1968-07-19 1984-06-14 Creusot-Loire, Paris Vorrichtung zum Schmieden von Kurbelhüben in einer vertikal wirkenden Schmiedepresse
SU583866A1 (ru) * 1975-07-30 1977-12-15 Челябинский Политехнический Институт Им.Ленинского Комсомола Способ изготовлени деталей типа коленчатых валов
EP0003139A1 (fr) * 1978-01-14 1979-07-25 Instytut Obrobki Plastycznej Procédé, produit brut et dispositif pour le forgeage d'un arbre de manivelle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101844198A (zh) * 2009-03-27 2010-09-29 本田技研工业株式会社 曲轴的制造装置和制造方法
CN101844198B (zh) * 2009-03-27 2012-08-22 本田技研工业株式会社 曲轴的制造装置和制造方法
CN102548684A (zh) * 2010-09-17 2012-07-04 丰田自动车株式会社 曲轴的制造方法及曲轴的制造装置
CN102548684B (zh) * 2010-09-17 2014-12-03 丰田自动车株式会社 曲轴的制造方法及曲轴的制造装置
CN102886478A (zh) * 2011-07-21 2013-01-23 张德崑 多功能液压机

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SU1440333A3 (ru) 1988-11-23
DE3484732D1 (de) 1991-07-25
US4646551A (en) 1987-03-03
ES538570A0 (es) 1985-11-01
ES8600707A1 (es) 1985-11-01
CA1228253A (fr) 1987-10-20
JPS60145233A (ja) 1985-07-31
EP0144981A3 (en) 1987-08-19
EP0144981B1 (fr) 1991-06-19
PL245115A1 (en) 1985-06-18
PL141712B1 (en) 1987-08-31
CS273158B2 (en) 1991-03-12

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