US3847008A - Hydraulic forging press - Google Patents

Hydraulic forging press Download PDF

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Publication number
US3847008A
US3847008A US00356452A US35645273A US3847008A US 3847008 A US3847008 A US 3847008A US 00356452 A US00356452 A US 00356452A US 35645273 A US35645273 A US 35645273A US 3847008 A US3847008 A US 3847008A
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United States
Prior art keywords
piston
forging
coupling
cylinder
pistons
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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 - Lifetime
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US00356452A
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English (en)
Inventor
H Schmoll
H Robra
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Schloemann AG
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Schloemann AG
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    • 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
    • B21J7/20—Drives for hammers; Transmission means therefor
    • B21J7/22—Drives for hammers; Transmission means therefor for power hammers
    • B21J7/34—Drives for hammers; Transmission means therefor for power hammers operating both the hammer and the anvil, so-called counter-tup
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
    • B30B1/34—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure involving a plurality of plungers acting on the platen

Definitions

  • ABSTRACT A horizontal hydraulic forging press has counteracting forging pistons which are coupled so that the forging movements of the forging pistons are coupled together. The coupling is done by each forging piston May 2, 1972 Germany 2221341 having a p and a a d yt g shan at least two coupling-cylinder units being connected to [52] U5.
  • the piston-cylinder unit 100/264 which increases in volume is connected to a pistoncylinder unit which decreases in volume and is associ- [56] References Cited ated with the other piston, and vice versa, in order to UNITED STATES PATENTS Obtam Proper couphng- I 3,209,578 10/1965 Muller 72/407 5 Claims, 4 Drawing Figures 77' 3 5 7d 9 7b a 75q ⁇ g 7 77 78 73 76 15 a 8 77 75!:
  • the invention relates to a horizontal hydraulic forging press for forging billets or the like with coupled, counter-acting forging pistons and cylinders which operate in opposition to each other and with retracting means.
  • Forging presses for the application described above are known. In general, they forge from four sides, i.e. in four equiangularly-spaced directions in one plane.
  • the forging tools normally each have their own individual drives, which can be mechanical or hydraulic; the drives are positively interlinked by mechanical elements such as gear wheels, or multi-piston pumps.
  • These known forging presses are expensive to construct.
  • the relatively enclosed working space of these machines makes it difficult to discharge the scale coming from the workpieces and exposes the highgrade components in the forging space to increased wear.
  • the accessibility to the tools and other components of the working space in such forging presses is limited.
  • each said piston having a step and having a rearwardlyextending shank; respective cylinders receiving the forging pistons, the steps being within the respective cylinders and the shanks projecting rearwardly out of the respective cylinders;
  • retracting means for retracting the forging pistons after a forging stroke
  • the invention can provide a press with good accessibility to the working space and reliable discharge of scale with corresponding facilities for forging the workpiece, and the press can therefore be of simpler and less expensive construction.
  • the horizontal arrangement of the two oppositely operating forging pistons gives a working space which is open on both sides and therefore ensures reliable discharge of scale and convenient accessibility.
  • the hydraulic coupling between the two forging pistons ensures synchronisrn of the two forging pistons with simple components such as pistons and cylinders and, having regard to the number and design of machine parts required, the forging press of the invention can be less expensive than conventional forging presses, which usually have four forging slides and a correspondingly complex arrangement of the machine parts.
  • the surface areas of the coupling pistons associated with one forging piston will be identical to the surface areas of the coupling pistons associated with the other forging piston so that the movements of the two forging pistons will be constrained to be substantially identical.
  • the shank of each forging piston has a central coupling cylinder, and two or more coupling cylinders which act in the opposite direction to the central coupling cylinder are equispaced around the shank, the respective coupling pistons of the central coupling cylinder and of the coupling cylinders therearound being fixed in position, i.e. fixed to the frame of the forging press.
  • each forging piston has a central coupling piston, and two or more coupling pistons which act in the opposite direction to the central coupling piston are equi-spaced around the shank, the respective coupling cylinders of the central coupling piston and of the coupling pistons therearound being fixed in positlon.
  • each forging piston has a central coupling cylinder
  • another coupling cylinder which acts in the opposite direction to the central coupling cylinder, is disposed coaxially with and spaced to the rear of the rear end of the shank and is connected to the shank, the respective coupling pistons of the central and coaxial coupling cylinders being fixed in position.
  • FIG. 1 is a plan, mainly in horizontal section, of part of a forging press in accordance with the invention
  • FIG. 2 is a like view of part of another forging press in accordance with the invention.
  • FIG. 3 is a like view of part of a third forging press in accordance with the invention, the coupling pistons adapted to act in the working and reverse direction being disposed in tandem in the forging axis; and
  • FIG. 4 is a plan, mainly in horizontal section along two different, parallel plan of half of a fourth forging press in accordance with the invention.
  • Forging pistons 4 and 5 slide in opposite directions in the forging cylinders 2 and 3, the end faces of the forging pistons being provided with forging tups, saddles or tools 6 and 7.
  • the forging pistons 4 and 5 are constructed as stepped pistons within the cylinders 2 and 3, the piston shanks 8 and 9 extending rearwardly from the rear surfaces of the forging cylinders 2 and 3.
  • Coupling cylinders 10 and 11, which are open to the rear, are provided in the end faces of the piston shanks 8 and 9.
  • the ends of the piston shanks 8 and 9 have cross members 12 and 13 mounted thereon to accommodate further coupling cylinders 14a, 14b and 15a, 15b which are open to the front to the forging direction).
  • Coupling pistons 10 and 11 are fixed to the frame 1 by means of tie rods 16 and cross-members 17 which connect the coupling pistons 10' and 11' to the cylinders 2 and 3 respectively.
  • the coupling pistons 10' and 11' are adapted to plunge into the coupling cylinders 10 and 11 and have identical end faces.
  • the coupling cylinders 14a, 14b and 15a, 1512 which are open to the front are connected to the shanks 8 and 9 of the forging pistons and operate with coupling pistons 14a, 14b and 15a, 15b, which are fixed to the cylinders 2 and 3.
  • the coupling pistons 10', 14a, 14b as well as 11", 15a, 15b are provided with longitudinal bores 18.
  • the coupling cylinder 10 is connected via the bore 18 in the coupling piston 10', ducts l9 and bores 18 in respective coupling pistons 15a and 15b to the coupling cylinders 15a and 15b, which are disposed on the side of the opposite forging cylinder 3 and act in the reverse direction on the forging piston 5.
  • the area of the end face of the coupling piston 10' is equal to the sum of the areas of the end faces of the coupling pistons 15a and 15b.
  • the coupling cylinder 11 is connected in like manner via ducts 20 to the coupling cylinders 14a and 14b.
  • the area of the end face of the coupling piston 11 is equal to the sum of the areas of the end faces of the coupling pistons 14a and 14b.
  • the forging pistons 4 and 5 are positively controlled because of the aforementioned connections between the appropriate coupling pistons and cylinders and therefore always operate precisely and uniformly on the workpiece (not shown) which is to be forged.
  • the forging cylinders 2 and 3 are pressurised with hydraulic fluid via a common duct 21.
  • Retraction cylinders and pistons (not shown) are connected to the appropriate forging pistons 4 and 5 or piston shanks 8 and 9 respectively.
  • coupling fluid is displaced from the coupling cylinders 15a and 15b to the coupling cylinder 10 via ducts 19.
  • the hydraulic coupling is merely required to compensate for any force differences occurring for example due to different frictional forces on the forging pistons 4 and 5, the areas of the respective coupling pistons which co-operate with the two forging cylinders 2 and 3 or the forging pistons 4 and 5 being kept equal to one another.
  • the coupling cylinders 10, 14a, 14b and 11, 15a, 15b are stationary while the corresponding coupling pistons 10', 14a, 14b and 11, 15a and 15b are fixed to the appropriate piston shanks.
  • FIG. 3 shows a further way of arranging the coupling cylinders and pistons.
  • the coupling cylinders 10 and 14 or 11 and 15 respectively are disposed in one axis, namely the forging axis, the co-operating pistons 10' and 15' or 11' and 14' having identical piston areas.
  • FIG. 4 shows a press which combines many of the features of the presses of FIGS. 1 and 2, and also shows the construction in more detail.
  • the references in FIG. 4 indicate parts corresponding to those with the same references in FIGS. 1 and 2, and the operation of the press is generally as in FIGS. 1 and 2.
  • the coupling cylinder 10 (corresponding to that in FIG.
  • the forging cylinder 2 is secured to the frame members 1a and 1b by straps 1a and 1b which are tightened against the frame members by bolts (indicated by the dot-dash lines) screwed into the forging cylinder 2.
  • the forging tools 6 (and 7, not shown in FIG. 4) are mounted on the respective forging pistons 4 (and 5, not shown in FIG. 4) as described in detail in our German Pat. Application No. P 22 25 528.3, filed on 26th May, 1972.
  • the lower part of the cylinder 2 has two axiallyspaced sliding seals 2a, which also provide guidance for the forging piston 4, the seals being retained by a retainer ring 2b and bolts (indicated by the dot-dash lines).
  • the upper part of the forging cylinder 2 has a similar sealing arrangement, for the piston shank 8, and the coupling cylinders 10 and 14a also have similar sealing arrangements.
  • the ducts 2c, 10a and 12a leading to the respective cylinders are shown; the further connecting ducts such as 19', 20 and 21 in FIGS. 1 and 2 are not shown, but are conventional.
  • the two-sided forging press arrangement of any of FIGS. 1 to 4 could be duplicated to provide a four-sided forging press as long as there was suitable coupling between the two sets of forging pistons.
  • a horizontal hydraulic forging press comprising:
  • each said piston defining a step and having a rearwardlyextending shank
  • steps being within respective said cylinders and said shanks projecting rearwardly out of respective said cylinders;
  • At least two coupling piston-cylinder units connected to each said shank, at least one of said pistoncylinder units having a cylinder volume which increases with progressive motion of said shank in the forging direction and at least another one of said piston-cylinder units having a cylinder volume which decreases with progressive motion of said shank in the forging direction;
  • duct means intercommunicating the at least one coupling piston-cylinder unit which is connected to said first forging piston and has said increasing cylinder volume with the at least one coupling pistoncylinder unit which is connected to said second forging piston and has said decreasing cylinder volume, and also intercommunicating the at least one coupling piston-cylinder unit which is connected to said second forging piston and has said increasing cylinder volume with the at least one coupling piston-cylinder unit which is connected to said first forging piston and has said decreasing cylinder volume, whereby said coupling piston-cylinder units couple together the forging movements of said forging pistons.
  • each said forging piston has a central coupling cylinder of a said piston-cylinder unit, and two or more coupling cylinders of said piston-cylinder units which act in the opposite direction to said central coupling cylinder are equi-spaced around said shank, said central coupling cylinder and said coupling cylinders therearound having respective coupling pistons which are fixed to said press frame.
  • each said forging piston has a central coupling cylinder of a said piston-cylinder unit, and another coupling cylinder of another said piston-cylinder unit, which acts in the opposite direction to said central coupling cylinder, is disposed coaxially with and spaced to the rear of the rear end of said shank and is connected to said shank, said central and coaxial coupling cylinders having respective coupling pistons which are fixed to said press frame.
  • each said forging piston has a rear end having a central coupling piston of a said piston-cylinder unit, said central coupling piston having a respective coupling cylinder which is fixed to said press frame, and wherein two or more coupling cylinders of said pistoncylinder units which act in the opposite direction to said central coupling cylinder are equi-spaced around said shank, said two or more coupling cylinders having respective coupling pistons which are fixed to said press frame.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Presses (AREA)
  • Actuator (AREA)
US00356452A 1972-05-02 1973-05-02 Hydraulic forging press Expired - Lifetime US3847008A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722221341 DE2221341A1 (de) 1972-05-02 1972-05-02 Hydraulische schmiedemaschine zum ausschmieden von knueppeln oder dergleichen

Publications (1)

Publication Number Publication Date
US3847008A true US3847008A (en) 1974-11-12

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US00356452A Expired - Lifetime US3847008A (en) 1972-05-02 1973-05-02 Hydraulic forging press

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US (1) US3847008A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5420704B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT323515B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2221341A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES414082A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2183182A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1425129A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT984093B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142397A (en) * 1976-10-14 1979-03-06 "Wefoba" Werkzeug-und Formenbau Gesellschaft m.b.H. Co. KG Counterblowing machine hammer
US4191045A (en) * 1978-07-11 1980-03-04 Abramov Valentin S Power hammer with opposed movement of ram and bolster
US4260346A (en) * 1979-10-09 1981-04-07 Anderson Jr Raymond B Press assembly for powder material
US20020090880A1 (en) * 2000-09-07 2002-07-11 Lee James S.W. Jointed support system and method of constructing same
WO2008085142A1 (fr) * 2007-01-12 2008-07-17 Olexandr Julevich Levestam Presse hydraulique
CN102886479A (zh) * 2012-10-26 2013-01-23 常州市立威刀具有限公司 对击联动式模锻装置
US20150013423A1 (en) * 2013-07-12 2015-01-15 The Boeing Company Apparatus and Method for Momentum-balanced Forging

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5620116Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1978-11-24 1981-05-13
DE3738217C2 (de) * 1986-11-25 1996-09-26 Hasenclever Maschf Sms Schmiedemaschine
DE4446580A1 (de) * 1994-12-24 1996-07-04 Pahnke Eng Gmbh & Co Kg Doppelpresse
CN103072299B (zh) * 2012-12-25 2015-01-07 上海帮容环保科技有限公司 带有移动垫块的油压机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209578A (en) * 1960-02-11 1965-10-05 Hydraulik G M B H Fa Apparatus for forging ingots into a base material
US3429174A (en) * 1965-02-10 1969-02-25 Langestein & Schemann Ag Presses
US3707866A (en) * 1967-10-09 1973-01-02 Langenstein & Schemann Ag Machines for forming a workpiece between two ram heads

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209578A (en) * 1960-02-11 1965-10-05 Hydraulik G M B H Fa Apparatus for forging ingots into a base material
US3429174A (en) * 1965-02-10 1969-02-25 Langestein & Schemann Ag Presses
US3707866A (en) * 1967-10-09 1973-01-02 Langenstein & Schemann Ag Machines for forming a workpiece between two ram heads

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142397A (en) * 1976-10-14 1979-03-06 "Wefoba" Werkzeug-und Formenbau Gesellschaft m.b.H. Co. KG Counterblowing machine hammer
US4191045A (en) * 1978-07-11 1980-03-04 Abramov Valentin S Power hammer with opposed movement of ram and bolster
US4260346A (en) * 1979-10-09 1981-04-07 Anderson Jr Raymond B Press assembly for powder material
US20020090880A1 (en) * 2000-09-07 2002-07-11 Lee James S.W. Jointed support system and method of constructing same
US6681472B2 (en) * 2000-09-07 2004-01-27 C.J. Associates, Ltd. Method of assembling jointed support system
WO2008085142A1 (fr) * 2007-01-12 2008-07-17 Olexandr Julevich Levestam Presse hydraulique
CN102886479A (zh) * 2012-10-26 2013-01-23 常州市立威刀具有限公司 对击联动式模锻装置
US20150013423A1 (en) * 2013-07-12 2015-01-15 The Boeing Company Apparatus and Method for Momentum-balanced Forging
US9573185B2 (en) * 2013-07-12 2017-02-21 The Boeing Company Apparatus and method for momentum-balanced forging

Also Published As

Publication number Publication date
IT984093B (it) 1974-11-20
ES414082A1 (es) 1976-02-01
GB1425129A (en) 1976-02-18
JPS5420704B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-07-25
DE2221341A1 (de) 1973-11-15
AT323515B (de) 1975-07-10
JPS4961042A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-06-13
FR2183182A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-12-14

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