EP0034139B1 - Marteau coulé pour une machine à forger - Google Patents

Marteau coulé pour une machine à forger Download PDF

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Publication number
EP0034139B1
EP0034139B1 EP81890012A EP81890012A EP0034139B1 EP 0034139 B1 EP0034139 B1 EP 0034139B1 EP 81890012 A EP81890012 A EP 81890012A EP 81890012 A EP81890012 A EP 81890012A EP 0034139 B1 EP0034139 B1 EP 0034139B1
Authority
EP
European Patent Office
Prior art keywords
hammer
forging
recess
recesses
base
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.)
Expired
Application number
EP81890012A
Other languages
German (de)
English (en)
Other versions
EP0034139A1 (fr
Inventor
Bernd Dipl.-Ing. Kos
Wilfried Dr. Meyer
Rupert Strobl
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.)
Vereinigte Edelstahlwerke AG
Original Assignee
Vereinigte Edelstahlwerke AG
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
Application filed by Vereinigte Edelstahlwerke AG filed Critical Vereinigte Edelstahlwerke AG
Publication of EP0034139A1 publication Critical patent/EP0034139A1/fr
Application granted granted Critical
Publication of EP0034139B1 publication Critical patent/EP0034139B1/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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/06—Hammers tups; Anvils; Anvil blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/14—Forging machines working with several hammers

Definitions

  • the invention relates to a cast hammer for forging machines with an improved service life.
  • the hammers of forging machines are exposed to very high mechanical and thermal stresses.
  • long-forging machines for example, the pieces to be forged, which are heated to over 800 ° C., are fastened in a transport device, which then moves the elongated forged material through the actual forging machine, in which, for example, four hammers which can be moved at the same time and which deform the forged material are arranged.
  • a rotary movement can also be carried out, so that not only approximately square pieces but also round forgings can be obtained.
  • DE-OS No. 2024248 which shows the features listed in the preamble of claim 1, four hammers with respect their symmetry plane to use symmetrically designed side recesses that are arranged so that they can engage with the full block width fat in the side recesses of the tool in between. Without hitting each other, four hammers can strike at the same time, leaving a gap between them that corresponds to the minimum square cross-section to be forged.
  • DE-PS No. 965100 describes a die made of hot-work steel for the manufacture of turbine blades or the like, which is surrounded by at least one shrink jacket to prevent indentations in the engraving and in which a material recess is provided below the engraving area.
  • the forging hammers of forging machines have a base plate which can be connected to that of the forging connecting rod.
  • the base plate of the forging hammer is not subject to excessive mechanical stresses, since it only serves to transmit forces from the hammer to the forged connecting rod and a relatively large area is provided for this purpose. Furthermore, the thermal stress is only low, since even with long-term processing no temperatures can be reached that are significantly above 300 ° C.
  • the load on the work surface arranged opposite the base surface of the base plate is different.
  • the work surface generally has different sections, which have different tasks to perform in the course of the forging process.
  • a forging hammer, as seen in the axial direction of the forging, can have different areas.
  • That areas of the work surface that are not arranged parallel to the base surface serve to displace the material to be forged and, since the greatest forces act here, are subject to particularly heavy loads. That area of the work surface that is arranged approximately parallel to the base surface has the function that the material that has already been deformed is changed in its surface condition and is smoothed. This so-called smoothing surface is therefore not exposed to as much stress as the rest of the work surface.
  • the temperature of the work surface can reach over 800 ° C; considering that the temperature of the base surface is only approx. 300 ° C, it is understandable that the slightest defect in the forging hammer can already lead to a considerable reduction in the service life of the same. On the material side, only a few alloys are suitable at all to meet such high stresses, whereby it has been shown that nickel-based alloys with approx. 20% chromium are particularly suitable.
  • fire cracks develop in the hammers, which can be attributed to the high mechanical stress at high temperatures.
  • these fire cracks must be e.g. can be removed by grinding in order to avoid a notch effect, and after such cracks have been ground out, an overlay weld can be carried out to level the work surface.
  • Such hammers have a weight which no longer allows manipulation to be carried out without mechanical aids.
  • handling holes are provided in the base plate, which are not exposed to any essential mechanical stresses.
  • the aim of the present invention is to design known forging hammers, in particular for long forging machines, in such a way that a longer service life can be achieved.
  • the cast hammer according to the invention For forging machines, in particular long forging machines, with a base plate with a base surface which, when mounted on the connecting rod, bears against its base surface and with a working surface which is arranged opposite the base surface and has a smoothing surface which is approximately parallel to the base surface, consists essentially in that between Base plate and work surface is provided at least one rounded, wholly or partially penetrating and arranged in the vicinity of the thermal center of the hammer recess which passes through the symmetry plane of the hammer, which is approximately normal to the base plate, or is arranged symmetrically thereto. This results in a reduction in the cross-section of the forging hammer in those areas that are subject to particularly high mechanical and thermal stress.
  • At least one recess opens into the base surface, a uniform reduction in cross-section can be avoided, the recess as such being able to be arranged in the area where the forces are less.
  • the recesses are or are arranged parallel to the base surface, a particularly good compensation of the tensions during operation can be achieved, so that the fire cracks, which run normal to the work surface, grow more slowly and an increase in the service life can also be achieved. It is particularly advantageous to arrange the recess (s) with the stipulation that with respect to the outer wall or to (r) adjacent recess (s) there is an approximately uniform material thickness, which is particularly advantageous for both mechanical and thermal stresses Design is achievable.
  • the effect according to the invention of increasing the service life is achieved particularly favorably by the volume of the recess being at least 3%, preferably 5-15%, of that of the hammer.
  • the forging hammer shown in FIG. 1 has a base plate 1 provided with handling bores 3, the thickness of which is determined by the extensions 2, which are used to mount the forging hammer on the forged connecting rod, not shown.
  • the base surface 4, which also extends over the extensions 2, is arranged opposite the work surface, which has a region 5 which is arranged inclined to the base surface 4 and a smoothing surface 6 which is arranged parallel to the base surface.
  • a cylindrical recess 7 is provided between the base plate 1 and the work surface 5, 6, which extends over the entire length of the hammer and through whose axis the plane of symmetry of the hammer, which runs normal to the base plate, passes.
  • the recess thus extends over the entire working area of the one-piece hammer and results in a weight saving of about 5%.
  • 2 shows an embodiment of a hammer as it has proven particularly useful in practice.
  • the hammer has two recesses 8 above the base plate 1, so that a web 9 is formed.
  • the working surface extends from the web 9 over the smoothing surface 6 to the area 5.
  • two cylindrical recesses 10 are provided extend normal to the plane of symmetry and enforce it.
  • the cylindrical recesses open into the respective side surfaces 11.
  • the total height of the forging hammer is approximately 230 mm
  • the height of the base plate is 80 mm
  • the diameter of the two bores is 60 mm
  • the weight saving is approximately 7%.
  • FIG. 3 shows a particularly simple embodiment of a forging hammer, two base-shaped recesses 12 extending from the base surface 4, which extend normal to the smoothing surface and whose total volume is approximately 12%.
  • the thickness of the base plate is also determined here by the extensions 2, so that it is thicker than that region 13 which has no work surface.
  • the rounded recesses are always arranged near the thermal center of the hammer.
  • the thermal center of the hammer corresponds approximately to the center of gravity of the entire forging hammer.
  • All forging hammers shown in the drawings can also be designed so that the recesses e.g. can be filled again by welding or by welding a bolt. This does not result in a weight saving of approx. 10 to 20%, but the mechanical stability can be increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Claims (6)

1. Marteau en fonte pour machines à forger, en particulier machines à forger en long, comportant une plaque de base (1) avec une surface de base (4) qui, lorsque le marteau est monté sur la bielle de forge, est appliquée contre sa surface de base, et comportant une surface de travail (5) disposée à l'opposé de la surface de base (4) qui possède une surface de lissage (6), laquelle est dirigée sensiblement parallèlement à la surface de base, caractérisé en ce qu'il est prévu entre la plaque de base (1) et la surface de travail (5, 6) au moins un évidement ou alésage arrondi (7, 10, 12) traversant le marteau dans sa totalité ou en partie, disposé dans le voisinage du centre thermique du marteau qui traverse le plan de symétrie du marteau s'étendant sensiblement perpendiculairement à la plaque de base, ou disposé symétriquement par rapport à ce plan.
2. Marteau selon la revendication 1, caractérisé en ce qu'au moins un évidement débouche dans la surface de base (4).
3. Marteau selon la revendication 1, caractérisé en ce que l'évidement ou les évidements (7, 10) traversant le marteau, de préférence dans sa totalité, sont disposés parallèlement à la surface de base (4).
4. Marteau selon l'une des revendications 1, 2, 3 ou 4, caractérisé en ce que l'évidement ou les évidements sont disposés sous la réserve que l'on ait une épaisseur de matériau sensiblement uniforme par rapport à la paroi extérieure et à l'évidement ou aux évidements voisins.
5. Marteau selon l'une des revendications 1 à 4, caractérisé en ce que le volume des évidements (7, 10, 12) est égal à au moins 3% du volume du marteau, de préférence compris entre 5 et 15% de ce volume.
6. Marteau selon l'une des revendications 1 à 5, caractérisé en ce que l'évidement ou les évidements sont remplis avec un matériau correspondant essentiellement au matériau du marteau.
EP81890012A 1980-02-06 1981-01-23 Marteau coulé pour une machine à forger Expired EP0034139B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT636/80 1980-02-06
AT63680A AT365493B (de) 1980-02-06 1980-02-06 Schmiedehammer

Publications (2)

Publication Number Publication Date
EP0034139A1 EP0034139A1 (fr) 1981-08-19
EP0034139B1 true EP0034139B1 (fr) 1983-09-21

Family

ID=3495827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81890012A Expired EP0034139B1 (fr) 1980-02-06 1981-01-23 Marteau coulé pour une machine à forger

Country Status (3)

Country Link
EP (1) EP0034139B1 (fr)
AT (1) AT365493B (fr)
DE (1) DE3160896D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2507024C1 (ru) * 2012-08-10 2014-02-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ФГБОУ ВПО "КубГТУ") Вибробоек

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1066077C (zh) * 1997-04-07 2001-05-23 燕山大学 水平v型锥面砧锻造新工艺
RU2507023C2 (ru) * 2012-02-03 2014-02-20 Общество с ограниченной ответственностью "ОМЗ-Спецсталь" Подвесной боек

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2012782B (de) * 1970-03-18 Fried Krupp Hüttenwerke AG, 4630 Bochum Verfahren zur Herstellung schwerer, kompakter Hammerbaren
US1977420A (en) * 1930-06-02 1934-10-16 Beche Hans Hammer tup
DE608449C (de) * 1933-12-31 1935-01-25 Aeg Pressform oder Gesenk mit scharfen Kanten
DE803144C (de) * 1948-10-02 1951-03-01 Beche & Grohs G M B H Hohlbaer fuer mechanische Haemmer
DE2024248A1 (de) * 1969-06-16 1971-01-07 Gesellschaft fur Fertigungstechnik und Maschinenbau GmbH, Steyr (Osterreich) Werkzeug fur Schmiedemaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE965100C (de) * 1954-07-25 1957-05-29 Wmf Wuerttemberg Metallwaren Gesenk aus Warmarbeitsstahl zum Herstellen von Metallgegenstaenden

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1977420A (en) * 1930-06-02 1934-10-16 Beche Hans Hammer tup
DE608449C (de) * 1933-12-31 1935-01-25 Aeg Pressform oder Gesenk mit scharfen Kanten
DE803144C (de) * 1948-10-02 1951-03-01 Beche & Grohs G M B H Hohlbaer fuer mechanische Haemmer
DE2024248A1 (de) * 1969-06-16 1971-01-07 Gesellschaft fur Fertigungstechnik und Maschinenbau GmbH, Steyr (Osterreich) Werkzeug fur Schmiedemaschinen
DE2012782B (de) * 1970-03-18 Fried Krupp Hüttenwerke AG, 4630 Bochum Verfahren zur Herstellung schwerer, kompakter Hammerbaren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2507024C1 (ru) * 2012-08-10 2014-02-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ФГБОУ ВПО "КубГТУ") Вибробоек

Also Published As

Publication number Publication date
DE3160896D1 (en) 1983-10-27
AT365493B (de) 1982-01-25
EP0034139A1 (fr) 1981-08-19
ATA63680A (de) 1981-06-15

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