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EP0003139A1 - Procédé, produit brut et dispositif pour le forgeage d'un arbre de manivelle - Google Patents

Procédé, produit brut et dispositif pour le forgeage d'un arbre de manivelle Download PDF

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Publication number
EP0003139A1
EP0003139A1 EP79100095A EP79100095A EP0003139A1 EP 0003139 A1 EP0003139 A1 EP 0003139A1 EP 79100095 A EP79100095 A EP 79100095A EP 79100095 A EP79100095 A EP 79100095A EP 0003139 A1 EP0003139 A1 EP 0003139A1
Authority
EP
European Patent Office
Prior art keywords
crank
die
rod
forging
articulated
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
EP79100095A
Other languages
German (de)
English (en)
Other versions
EP0003139B1 (fr
Inventor
Tadeusz Rut
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from PL1978204016A external-priority patent/PL112203B1/pl
Priority claimed from PL21113278A external-priority patent/PL122409B1/pl
Application filed by Instytut Obrobki Plastycznej filed Critical Instytut Obrobki Plastycznej
Priority to DE8181107830T priority Critical patent/DE2967146D1/de
Publication of EP0003139A1 publication Critical patent/EP0003139A1/fr
Application granted granted Critical
Publication of EP0003139B1 publication Critical patent/EP0003139B1/fr
Expired 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, a blank and a device for forging crank crankings, in particular for crankshafts and similar forgings.
  • crank cranks which is based on mutual compression of a rod section with simultaneous bending of the central part of this section.
  • this known method it is not possible to produce crank crankings which have extensive projections on the crank webs on the side of the crankshaft journals.
  • Such projections have so far been produced on the raw rod by turning those places which are to form the shaft journals and the crank journals in the finished crank.
  • Such turning is expensive and causes loss of material.
  • Metal fibers are cut through at the turned points, which adversely affects the strength of the forging.
  • Devices for forging crank cranks by upsetting and bending a rod are known, in which the press ram is connected by means of articulated levers to the upsetting tools designed as clamping jaws with positive locking, which move transversely to the direction of the press ram stroke.
  • the articulated levers are articulated on one side to a head piece arranged on the press ram and at the other end on the back of the upsetting tools above the parting plane of the clamping jaws.
  • Such a design of the device has the disadvantage that because of the articulation of the lower articulated lever ends only on one side of the tool division level during the working stroke, a moment of the force pair occurs which causes the uneven loading of the individual articulated levers.
  • the tools therefore have a tendency to "tip over".
  • the compressive force increases with the deflection of the articulated lever. With this deflection, however, the difference between the loads on the individual articulated levers and the moment of force that causes the upsetting tools to "tilt" increases.
  • the compressed rod section could only be bent in one direction.
  • the invention has set itself the task of enabling a forging of the crank cranks, in which the Crankshaft journals create extensive protrusions on the crank webs.
  • the direction of the compressed material to design the two upsets can be done using different methods.
  • One of these methods is that during the upsetting, the middle part of the upset rod section is pushed through transversely to the upsetting movement and in the opposite direction to the intended bending, and the middle part of the pushed through material is pressed into a fork-shaped caliber.
  • the cross section of the above-mentioned central part is tapered.
  • the material located in the caliber during and after being pressed through is pressed until a part of this material flows out of the caliber.
  • an additional work step in which the rod is compressed on both sides and at the same time its middle part in, is preceded by the work step known from the previous methods of compressing a rod on both sides with simultaneous bending of its central part forming the crank to finally bend the crank in the opposite direction and push the central part into a caliber.
  • Another design method of the two eccentric upsets is that, during the upsetting, an element limiting the flow of the material is applied to one side of the outer surface of the upset section, the surface of which corresponds to the surface line of the rod. On the opposite side, the middle part of the compressed material is pressed into a fork-shaped caliber. When pushing through, the cross section of the above-mentioned central part is tapered.
  • crank cranks can either be designed in one operation, or a blank is first made from the rod, which has two upsets arranged eccentrically with respect to the rod axis at all points where crank cranks are to be produced. Afterwards, one or more crank cranks are forged on this blank in a separate operation.
  • the invention therefore also relates to the shape of the above-mentioned raw part in the form of a rod, which on the sections which are intended for the design of each crank crank has on each side of its lateral surface two upsets arranged eccentrically with respect to the rod axis and at a certain distance lie from each other, and its lateral surface on the opposite the places are either saddle-shaped or at least partially in the surface line of the raw rod.
  • the method according to the invention can be carried out in various known devices after a certain adaptation of the tools and equipment.
  • a device which is the subject of the present invention is particularly suitable for carrying out the method according to the invention.
  • two split compression dies are arranged between the head piece and the frame, in which the material to be forged is clamped on both sides and compressed by moving these dies against the direction of the press ram stroke.
  • a bending tool and an anvil which are used to design the crank from the upset material.
  • the upsetting die halves are articulated on articulated levers, which in turn are mounted on the frame. These hingedly supported die halves are coupled to the other die halves, which are located on the second side of the die division plane, by means of drivers.
  • the anvil two work surfaces that are interchangeable during the working stroke.
  • the two interchangeable work surfaces of the anvil are designed such that the actual anvil is additionally equipped with a detachable forged saddle.
  • the anvil can also have two work surfaces that can be exchanged for each other using a turret holder.
  • the raw part is designed using an enforcement of the middle part of the compressed rod section, it is advantageous if inclined guide pieces are used in the device, which converge in the direction of the anvil.
  • die halves which are coupled to the articulated die halves by means of drivers are movably arranged.
  • crank crank and its detachment from the tools is facilitated by a pulling device, the arms of which embrace the bending tool on both sides. These arms of the puller have recesses which are used to form the crank webs laterally from the shaft journals.
  • the release of the crank offset from the tools is facilitated in that the bending tool rests on displaceable supports and plungers are arranged in the vicinity of the anvil and can be pushed out in the direction of the bending tool.
  • Unfavorable tensions in the construction are eliminated in that the lower bearings of the inner articulated levers, which are arranged closer to the compression zone, on lower projections of the beams forming the base are supported. These bars have the shape of an elongated letter H.
  • the upper bearings of these inner articulated levers are arranged on the lower die holders below the die parting plane.
  • the outer articulated levers which are further away from the compression zone, have their lower bearings supported on projections which are located in the upper part of the H-beams.
  • the upper bearings of the outer articulated levers are located on the lower die holders above the die division level. With such a construction, the beams forming the base are not bent. These bars are only drawn lengthways. No moment of force acts on the compression matrices. The loads on the articulated levers are distributed more evenly than in known devices.
  • the inner articulated levers are fork-shaped or U-shaped. Her arms enclose the lower die holder on the side.
  • the use of the fork-shaped articulated levers instead of the articulated levers with a rectangular outline known from DE-PS 1 301 297 allows the bearing axis to approach the die division plane. This is particularly advantageous for devices for forging crankshafts, for two reasons: it allows the height of the device to be reduced and causes a more even load on the articulated levers.
  • the device shown in Fig. 1 and 2 consists of two assemblies, namely a lower and an upper.
  • the lower assembly has two bars 1 underneath, the outline of which is similar to an elongated letter H. These bars are connected to each other with spacer screws. These bars 1 are supported on a plate 2. Each bar 1 has two projections 1a on the upper surface and two further projections 1b on the lower surface. Two crossbars 3 are held on the lower projections 1b. A bearing roller 4 is seated on each of these beams 3. An articulated lever 5 is articulated on each bearing roller 4 and is designed in the shape of a fork or U, which is visible in FIG. 5. The lower bearing surface of the articulated lever 5 is concave-cylindrical, whereas the upper bearing surfaces of the articulated lever 5 are convex-cylindrical.
  • Each articulated lever is connected and secured to the bearing rollers by two connecting members 6 (FIG. 3).
  • the connecting links are in the form of straps, the projections of which engage in corresponding recesses in the bearing rollers and the articulated levers.
  • the lower die holder 7 is articulated on the upper arms 5a of each articulated lever 5.
  • the articulation point of each die holder 7 on the articulated lever 5 is below the die parting plane.
  • the die holder is secured to the articulated lever 5 by means of bolts 8 (FIG. 5).
  • a bearing roller 9 is fastened on both sides to each lower die holder 7 above the die division plane.
  • Analog bearing rollers 10 are provided on the upper surface of the beam 1 and on the upper projection 1a.
  • An articulated lever 11 is arranged between each of the bearing rollers 9 and 10. In the device, therefore, each lower die holder is articulated on two articulated levers 11 and a fork-shaped articulated lever 5 and forms a parallel with them and the bars logging.
  • Hydraulic cylinders 13 are fastened to the beam ends and are connected to the die holders 7 by means of pull cables. These traction ropes are guided by rollers 12. The cylinders 13 serve to return the die holder to the starting position up to the stop 15.
  • the upper assembly of the device consists of two upper beams 16, which are connected to each other with spacer screws.
  • the beams 16 are equipped with two inclined guide pieces 16a, to which two upper die holders 18 are slidably attached by means of strips 17. In their starting position, these die holders rest against stops 19.
  • the die holders have projections 18a, which serve as drivers and are coupled to the projections 7a of the lower die holder 7 during the working stroke. In this way, the die holders 7 and 18 are coupled.
  • the tool inserts which are shown in FIGS. 6 to 13, are installed in the device according to FIGS. 1 and 2.
  • the tool inserts 20 are installed in the lower die holder 7 and the tool inserts 21 in the upper die holder 18.
  • the bending tool 23 is fastened to the holder 22 arranged on the plate 2.
  • the anvil 25 is attached together with the removable forging saddle 26.
  • crankshafts which have a plurality of crank cranks, which fix the mutual angular position of the individual crank cranks.
  • the device according to the invention works as follows: in the open state, the material 27 to be forged is placed in the form of a rod on the lower tool inserts 2 0 and starts the press.
  • P r e is ssetisch 28 and referred to the press ram with 29th
  • the upper die holders 18 press onto the lower die holders 7. Because of the perpendicular deviation of the articulated levers 5 and 11 in the direction of the vertical plane of symmetry, and because of the movable arrangement of the upper die holders 18, the left and right dies are moved against each other in a horizontal direction .
  • the rod section located between the end faces of the two pairs of tool inserts 20, 21 is compressed.
  • the forging saddle Because of the inclined position of the guide pieces 16a of the upper die holder 18, the forging saddle approaches the axis of the material 27 during the working stroke, which causes an enforcement in the direction of the bending tool 23.
  • the central section of the material passed through is pressed into a fork-shaped caliber in the bending tool 23.
  • This caliber tapers downwards and its width in the lower part is smaller than the diameter of the forged starting material. This push-through thus causes the section in question to taper in the horizontal direction.
  • the meterial is pressed further from above during the working stroke.
  • the material partially flows out of the caliber and, together with the further compressed material, forms upsets 27a on both sides of the bending tool.
  • the working stroke is interrupted and the forging saddle 26 is removed after the press ram has been raised slightly. Then the press is started again.
  • the blank is bent in the opposite direction by the bending tool and further compressed on both sides.
  • the forging process ends when the lower die holder 7 abut the beam 1.
  • the upsetting 27a creates extensive projections 33a on the crank webs 33, which protrude over the shaft journals protrude in the opposite direction to the crank.
  • the finished crank crank is pulled out of the tool inserts during the return movement of the press ram.
  • the pulling device serves for this purpose, the arms 30 of which embrace the bending tool 23 on both sides. In these arms there are recesses 31, which are used to form the crank arms 33 on the side of the shaft journal. These arms 30 of the puller are connected to the bar 16 by means of tie rods 32.
  • the lower assembly of the device has a construction similar to that in the device according to FIG. 1, with the only difference that the bending tool rests on two supports which can be moved laterally.
  • the upper assembly on the other hand, is constructed differently. Instead of the oblique guide pieces 16a, horizontal guide pieces 16b are provided for the die holder 18 in this embodiment.
  • the holder 24, the anvil 25 and the forging saddle 26 are installed in a manner analogous to that in the device according to FIGS. 1 to 3 and 6 to 13. With such a construction, the height of the upper assembly is smaller and therefore the height of the whole Device smaller.
  • the forging saddle and the bending tool After removing the anvil, the forging saddle and the bending tool, such a device for upsetting can be used.
  • FIGS. 16 to 20, 23 and 24 works as follows: in the open state (FIG. 16), the rod-shaped material 27 to be forged is placed on the lower tool inserts 20 (FIG. 17) and the press is started .
  • the press table is designated 28 and the press ram 29.
  • the upper die holders 18 press onto the lower die holders 7 the perpendicular deviation of the articulated levers 5 and 11 in the direction of the vertical plane of symmetry and because of the movable arrangement of the upper die holder 18, the left and right dies are moved against each other in the horizontal direction.
  • the rod section located between the end faces of the two pairs of tool inserts is compressed.
  • the forging saddle 26 does not allow material flow upwards.
  • the lateral surface of the rod does not remain curved on this side.
  • Small burrs are formed only on both sides of the forged saddle, which have no significance for further processing.
  • the compressed material is directed downwards and to the sides. Because of the deflection of the articulated levers 5 and 11, the material 27 approaches the bending tool 23 during the working stroke.
  • the compressed material is pressed through into its fork-shaped caliber. This pushing causes a tapering of the section in question.
  • the material partially flows out of the caliber and, together with the further compressed material, forms upsets 27a on both sides of the bending tool. This creates a raw part of the crank offset, which is shown in FIGS. 21 and 22. Now the working stroke is interrupted and the forging saddle 26 is removed after the press ram has been raised slightly.
  • the press is started again.
  • the blank is bent in the opposite direction to the apexes of the upsets 27a.
  • the forging process ends when the lower die holder 7 abut the beam 1.
  • the upsetting 27a produces extensive projections 33a on the crank webs 33, which protrude beyond the shaft journals in the opposite direction to the crank.
  • the finished crank crank is pulled out of the caliber of the bending tool during an additional press stroke.
  • two plungers 34 are provided in the upper assembly, which protrude downwards, and in their lower layer can be locked with a bolt not shown in the drawing. After opening the press, these rams are pulled down and locked, the supports 35 of the bending tool 23 are moved to the side, and the press is started. The plungers 34 press on the upper surface of the bending tool 23 and move it downwards. After opening the press, the finished crank crank can be lifted out of the tool inserts 20.
  • crankshafts can also run differently than has been described above with reference to the drawing. You can make the blank first. Of the . The process of designing this blank ends approximately at the stage shown in FIGS. 7 or 18. This blank is a semi-finished product that can be further processed into a crankshaft at any time by upsetting and simultaneously bending. This further processing can be carried out in another known device. The upsets produced on the raw part enable extensive projections 33a to be formed on the crank webs, a regular metal fiber course being ensured in the crank.
  • crankshafts with a single crank were shown in the drawings. It is obvious that shafts with multiple cranks can also be produced according to the invention.
  • the raw part has two eccentric upsets 27a at each point that is provided for designing the offset. These upsets are spatially oriented to the cranking planned on the crankshaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP79100095A 1978-01-14 1979-01-12 Procédé, produit brut et dispositif pour le forgeage d'un arbre de manivelle Expired EP0003139B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8181107830T DE2967146D1 (en) 1978-01-14 1979-01-12 Device for upsetting on presses

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
PL204016 1978-01-14
PL1978204016A PL112203B1 (en) 1978-01-14 1978-01-14 Method of and apparatus for forging crank throws
PL211132 1978-11-22
PL21113278A PL122409B1 (en) 1978-11-22 1978-11-22 Crank forging method and apparatus therefor

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP81107830.2 Division-Into 1979-01-12

Publications (2)

Publication Number Publication Date
EP0003139A1 true EP0003139A1 (fr) 1979-07-25
EP0003139B1 EP0003139B1 (fr) 1983-05-25

Family

ID=26652894

Family Applications (2)

Application Number Title Priority Date Filing Date
EP79100095A Expired EP0003139B1 (fr) 1978-01-14 1979-01-12 Procédé, produit brut et dispositif pour le forgeage d'un arbre de manivelle
EP81107830A Expired EP0048499B1 (fr) 1978-01-14 1979-01-12 Dispositif à refouler sur des presses

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP81107830A Expired EP0048499B1 (fr) 1978-01-14 1979-01-12 Dispositif à refouler sur des presses

Country Status (13)

Country Link
US (1) US4272979A (fr)
EP (2) EP0003139B1 (fr)
JP (1) JPS54148160A (fr)
AR (1) AR216206A1 (fr)
AT (1) AT362979B (fr)
BR (1) BR7900201A (fr)
CA (1) CA1106653A (fr)
DK (1) DK151533B (fr)
ES (2) ES476824A1 (fr)
FI (1) FI67795C (fr)
HU (1) HU180814B (fr)
IN (1) IN152965B (fr)
YU (1) YU1979A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144981A2 (fr) * 1983-12-13 1985-06-19 Instytut Obrobki Plastycznej Procédé et dispositif pour le forgeage de vilebrequins sur des presses
FR2640170A1 (fr) * 1988-11-25 1990-06-15 Sverdlovsky Inzh Ped Dispositif pour la deformation cyclique d'une bande continue

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL121730B1 (en) * 1979-06-09 1982-05-31 Instytut Obrobki Plastycznej Forging apparatus
US4517717A (en) * 1983-12-05 1985-05-21 Gentry Elvin O Crankshaft inspection apparatus and method
PL187876B1 (pl) * 1999-03-05 2004-10-29 Inst Obrobki Plastycznej Urządzenie do kucia przez spęczanie
KR100759194B1 (ko) 2000-07-31 2007-09-14 닛폰 세이키 가부시키가이샤 조명장치
US20070056345A1 (en) * 2005-09-09 2007-03-15 Showa Denko K.K. Upsetting method and upsetting apparatus
JP4854564B2 (ja) * 2007-03-30 2012-01-18 リズム時計工業株式会社 照明装置
US9707618B2 (en) * 2012-12-12 2017-07-18 Nippon Steel & Sumitomo Metal Corporation Apparatus for forming a blank for finish forging for a forged crankshaft for a three-cylinder engine and method for manufacturing a forged crankshaft for a three-cylinder engine using the same
CN103551850B (zh) * 2013-11-14 2016-08-17 重庆应国机械制造有限责任公司 单拐全纤维曲轴锻件的闭式挤压锻造工艺
DE102014212732B4 (de) * 2014-07-01 2022-02-24 Sms Group Gmbh Verfahren und Anstauchvorrichtung zum Herstellen von abgesetzten Werkstücken, wie Wellen oder Stäbe
US10654092B2 (en) * 2015-05-14 2020-05-19 Neturen Co., Ltd. Method and apparatus for manufacturing stepped member
CN113059102B (zh) * 2021-03-15 2023-12-01 中机精密成形产业技术研究院（安徽）股份有限公司 一种经编机用梳栉吊架底座的多工位锻造方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR779043A (fr) * 1933-12-20 1935-03-28 Cie Forges Et Acieries Marine Procédé pour le forgeage d'essieux ou arbres coudés, et organes mécaniques analogues
US2743500A (en) * 1950-12-07 1956-05-01 Erie Forge Company Forging method and apparatus
DE957007C (de) * 1954-02-09 1957-01-24 Schloemann Ag Verfahren und Vorrichtung zum Schmieden von mehrhuebigen Kurbelwellen
US2959840A (en) * 1955-02-21 1960-11-15 Baldwin Lima Hamilton Corp Apparatus for forging crankshafts
DE1936012A1 (de) * 1968-07-19 1970-01-29 Companie Des Ateliers Et Forge Vorrichtung zum Schmieden von Kurbelwellen u.dgl.

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Publication number Priority date Publication date Assignee Title
US2827685A (en) * 1952-07-24 1958-03-25 English Steel Corp Ltd Apparatus for forging crank-shafts and like work-pieces
FR1166199A (fr) * 1956-02-23 1958-11-04 Schloemann Ag Dispositif pour le forgeage graduel des coudes de vilebrequins
FR1166978A (fr) * 1956-02-24 1958-11-18 Schloemann Ag Dispositif pour le forgeage de vilebrequins
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
DE1301297B (de) * 1964-09-02 1969-08-21 Ts Lab Obro Bki Plastycznej Vorrichtung fuer das Stauchen laenglicher Werkstuecke auf Pressen
PL82101B1 (fr) * 1971-07-31 1975-10-31
JPS4924337A (fr) * 1972-06-27 1974-03-04
DE2303451C2 (de) * 1973-01-25 1975-03-06 Eumuco Ag Fuer Maschinenbau, 5090 Leverkusen Vorrichtung zum Schmieden von Kurbelwellen, Flanschwellen u.dgl. mittels einer Schmiedepresse
JPS5139553A (ja) * 1974-10-01 1976-04-02 Kobe Steel Ltd Kurankusuroonokatairetanzosochi
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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR779043A (fr) * 1933-12-20 1935-03-28 Cie Forges Et Acieries Marine Procédé pour le forgeage d'essieux ou arbres coudés, et organes mécaniques analogues
US2743500A (en) * 1950-12-07 1956-05-01 Erie Forge Company Forging method and apparatus
DE957007C (de) * 1954-02-09 1957-01-24 Schloemann Ag Verfahren und Vorrichtung zum Schmieden von mehrhuebigen Kurbelwellen
US2959840A (en) * 1955-02-21 1960-11-15 Baldwin Lima Hamilton Corp Apparatus for forging crankshafts
DE1936012A1 (de) * 1968-07-19 1970-01-29 Companie Des Ateliers Et Forge Vorrichtung zum Schmieden von Kurbelwellen u.dgl.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Maschinenmarkt, Industriejournal 78 Nr. 29, 1972 Wurzburg G. NIENKE "Weniger Ausgangsgewicht beim Umformen" * Seiten 594 bis 598 * *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144981A2 (fr) * 1983-12-13 1985-06-19 Instytut Obrobki Plastycznej Procédé et dispositif pour le forgeage de vilebrequins sur des presses
EP0144981A3 (en) * 1983-12-13 1987-08-19 Instytut Obrobki Plastycznej Method and device for forging crankshafts onto presses
FR2640170A1 (fr) * 1988-11-25 1990-06-15 Sverdlovsky Inzh Ped Dispositif pour la deformation cyclique d'une bande continue

Also Published As

Publication number Publication date
ES476823A1 (es) 1979-07-16
FI67795C (fi) 1985-06-10
JPS54148160A (en) 1979-11-20
CA1106653A (fr) 1981-08-11
HU180814B (en) 1983-04-29
YU1979A (en) 1983-02-28
IN152965B (fr) 1984-05-12
DK151533B (da) 1987-12-14
ATA23579A (de) 1980-11-15
EP0048499B1 (fr) 1984-07-25
BR7900201A (pt) 1979-08-14
EP0003139B1 (fr) 1983-05-25
ES476824A1 (es) 1979-06-16
AT362979B (de) 1981-06-25
JPS5653455B2 (fr) 1981-12-18
FI790099A (fi) 1979-07-15
EP0048499A1 (fr) 1982-03-31
AR216206A1 (es) 1979-11-30
DK13979A (da) 1979-07-15
FI67795B (fi) 1985-02-28
US4272979A (en) 1981-06-16

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