US3834214A - Forging press - Google Patents

Forging press Download PDF

Info

Publication number
US3834214A
US3834214A US00354389A US35438973A US3834214A US 3834214 A US3834214 A US 3834214A US 00354389 A US00354389 A US 00354389A US 35438973 A US35438973 A US 35438973A US 3834214 A US3834214 A US 3834214A
Authority
US
United States
Prior art keywords
press
forging
gearing
slide blocks
screw threads
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 - Lifetime
Application number
US00354389A
Other languages
English (en)
Inventor
B Kralowetz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3834214A publication Critical patent/US3834214A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B21J9/18—Drives for forging presses operated by making use of gearing mechanisms, e.g. levers, spindles, crankshafts, eccentrics, toggle-levers, rack bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/14—Bending rods, profiles, or tubes combined with measuring of bends or lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/14—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons knurled articles
    • 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

  • ABSTRACT A forging press comprises two press rams slidably movable against each other in rigid slide tracks by a drive including, for each ram, two eccentric shafts coupled for rotation in opposite senses, an eccentric carried by each shaft, a respective slide block surrounding each eccentric, an elliptic chuck containing the two slide blocks, a rotatable screw and thrust rod member extending centrally through the chuck between the slide blocks and having at one end screw threads in threaded engagement with screw threads on the associated press ram, and being corotationally connected at its other end to an adjusting gearing.
  • the rod member is axially displaceable relative to the gearmg.
  • This invention relates to a high-speed forging press, which comprises two press rams, which are slidable in rigid slide tracks and to act against each other and are adapted to be driven by eccentric shafts, slide blocks surrounding the eccentrics on said shafts, and elliptic chucks.
  • This time of contact includes the time of the actual deformation and the times in which the machine exhibits a resilient expansion and contraction. Mainly in hydraulic presses the resilient expansion and contraction take more time than the deformation. An increase of the time of contact is accompanied by an increase of the heat quantity which is transferred from the workpiece to the forging tools. The tools may thus be heated until they are red hot and such a high temperature rise will obviously greatly increase the wear of the tools. This large heat transfer from the workpiece to the tool has also a highly adverse effect on the quality of the forging because it results in a premature formation of cracks on the surface and in a depressing of the surface.
  • hydraulic forging presses are highly undesirable because in addition to the mechanical compliance of the various components of the machine, such as rams, press frame, and the likethere is a hydraulic compliance, which is a multiple of the strictly mechanical compliance and is due to the compressibility of the hydraulic fluid used in relatively large amounts, and to the elasticity of the pipelines and containers etc. which are required.
  • the strictly mechanical forging press is most desirable.
  • the forging press is mechanically driven, in most cases by eccentrics, and in its stroke position can be adjusted by mechanical means, so that the spring excursions are within tolerable limits.
  • a comparison of the spring excursions of a mechanical forging press, a semihydraulic forging press and a fully hydraulic forging press shows that the use of a hydraulic fluid adds greatly to the spring capacity. For instance, in a press capable of exerting a force of 1,000 metric tons, the spring excursion is about millimeters in a fully hydraulic plant, about 15 millimeters in a semihydraulic plant, and only 5 millimeters in a strictly mechanical plant. It is apparent from these values that the times of contact vary greatly in the different types of machines.
  • a great disadvantage of mechanical forging presses is the fact that they permit only of a relatively complicated and closely limited adjustment of the stroke position because separate adjusting housings are required for this purpose and large machine components are needed as the forging forces increase.
  • the driving eccentric shafts would have to be very large in diameter so that their manufacture would become too difficult and the size of their bearings in the machine and consequently the overall size of the entire machine would become intolerably large.
  • the expenditure involved in the conventional means, such as adjusting housings or the like, required to adjust the stroke position would hardly be justifiable. For this reason, the previously known, strictly mechanical forging presses can be used only to exert small forging forces.
  • each press ram has associated with it at least two eccentric shafts, which are coupled to rotate in opposite senses, and that the associated slide blocks are contained in a common elliptic chuck, which is connected to the press rarn by a rotationally adjustable drive mechanism, which includes a screw, which serves also as a thrust rod and extends between the slide blocks centrally through the elliptic chuck and is rotatable in and axially fixed to said elliptic chuck and is guided at one end in female screw threads of the press ram and at the other end is corotationally connected and axially displaceable relative to an adjusting gearing, preferably a worm gearing.
  • a rotationally adjustable drive mechanism which includes a screw, which serves also as a thrust rod and extends between the slide blocks centrally through the elliptic chuck and is rotatable in and axially fixed to said elliptic chuck and is guided at one end in female screw threads of the press ram and at the other end is corotationally connected and axially
  • this highspeed forging press is driven and operated by strictly mechanical means, the spring excursion is minimized and the at least two eccentric shafts provided for each press ram prevent an excessive increase of the dimensions of components of machines designed for exerting large forging forces.
  • the load previously applied to one eccentric shaft is shared by a plurality of such shafts so that machines having components having approximately the same dimensions as before can be used to exert much larger forging forces.
  • the slide blocks which are guided in a common elliptic chuck and which during the reciprocation of the press ram slide toward or apart from each other constrain the screw to move exactly in the axis of the press ram and ensure a steady and reliable operation of the press ram.
  • the screw is guided by female screw threads of the press ram so that a rotation of the screw will result in a change of the distance between the elliptic chuck and press ram since the screw is axially fixed and rotatable relative to the elliptic chuck.
  • the adjusting means i.e., the screw, can be driven because the same carries at its end remote from the press ram a drive wheel, which is part of an adjusting gearing and transmits its rotation to the screw.
  • the drive wheel must be slidable along the axis of the screw so that theadjusting gearing can be mounted in a fixed position and yet the screw can perform its working movement without complications although the adjusting gearing is mounted in a fixed position.
  • the term working movement refers to the reciprocating motion which is imparted to the screw by the eccentrics, the slide blocks and the elliptic chuck and which is transmitted by the screw to the press ram.
  • the range in which the press rams can be adjusted depends only on the axial extent of the female screw threads and of the screw-threaded portion of the screw.
  • the structural expenditure remains within the conventional range and the structure of the machine itself is sufficiently rugged to ensure an operation involving no problems.
  • FIG. 1 is a side elevation showing partly in section a high-speed forging press according to the invention.
  • FIG. 2 is a sectional view taken on line lIII in FIG. 1, and
  • FIG. 3 is a sectional view taken on line Ill-III in FIG. 1.
  • the high-speed forging press generally designated 1 has two horizontally guided press rams 2, which act against each other and are slidable in rigid slide tracks 4 in a forging box 3.
  • Two eccentric shafts 5 are associated with each press ram 2 and are coupled for joint rotation by a spur gearing 6.
  • Each of the eccentric shafts 5 comprises an eccentric 7, which is surrounded by a slide block 8.
  • the corresponding slide blocks 8 move with mirror symmetry in a common elliptic chuck 9.
  • the elliptic chuck 9 is connected to the press ram 2 by a mechanism which comprises a screw 10, which is axially fixed in and rotatable relative to the elliptic chuck 9 and which transmits the movement of the elliptic chuck to the press ram.
  • the screw 10 extends centrally through the elliptic chuck and between the slide blocks 8. It is guided at one end in female screw threads 11 of the press ram 2 and at the other end is corotationally coupled to and axially displaceable relative to the adjusting gearing 12, which in most cases consists of a worm gearing.
  • the high-speed forging press 1 is driven by two synchronized motors 13. Each motor 13 rotates by means of clutches 14, 15 and intermediate gear trains 16 the eccentric shafts associated with a press ram 2 so that the working motion is imparted to the press ram 2. To adjust the stroke position of the press rams 2, the screw 10 serving as a thrust rod is rotated by the adjusting gearings 12, which are also synchronized. This results in a change of the distance between the elliptic chuck 9 and the press ram 2 and consequently in a change of the stroke position. Because the forging press according to the invention is driven by strictly mechanical means, it has only a small overall compliance so that only a small spring excursion must be overcome in each working stroke of the press rams. This affords the advantage that only a small loss is involved as this spring capacity is overcome and that the time of contact between the tool and workpiece is short. This is essential for a high quality of the forgings and for the profitability of the machine.
  • a forging press which comprises a frame
  • each of said press rams having female screw threads
  • drive means for driving said press rams said drive means including for each of said'press rams at least two eccentric shafts, means coupling said eccentric shafts for rotation in opposite senses, two eccentrics, each carried by a respective one of said eccentric shafts, two slide blocks, each surrounding a respective one of said eccentrics, an elliptic chuck containing said two slide blocks, a rotatable screw and thrust rod member extending between said slide blocks centrally through said elliptic chuck and being rotatable in and axially fixed to said elliptic chuck and having at one end screw threads in threaded engagement with said female screw threads of the associated press ram, and
  • said screw and thrust rod member at its other end being corotationally connected and axially disadjusting gearing is a worm gearing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Control Of Presses (AREA)
US00354389A 1972-06-09 1973-04-25 Forging press Expired - Lifetime US3834214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT497572A AT311768B (de) 1972-06-09 1972-06-09 Schnellhubschmiedepresse

Publications (1)

Publication Number Publication Date
US3834214A true US3834214A (en) 1974-09-10

Family

ID=3570519

Family Applications (1)

Application Number Title Priority Date Filing Date
US00354389A Expired - Lifetime US3834214A (en) 1972-06-09 1973-04-25 Forging press

Country Status (7)

Country Link
US (1) US3834214A (xx)
JP (1) JPS5420703B2 (xx)
AT (1) AT311768B (xx)
DD (1) DD103163A5 (xx)
DE (1) DE2319032A1 (xx)
FR (1) FR2187455B1 (xx)
GB (1) GB1370408A (xx)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929000A (en) * 1973-11-15 1975-12-30 Bruno Kralowetz High-speed short-stroke forging press
FR2477439A1 (fr) * 1980-03-04 1981-09-11 Schloemann Siemag Ag Cage refouleuse a cylindres reglables en charge
US4760728A (en) * 1985-11-22 1988-08-02 Kawasaki Steel Corporation Method for reducing widths of hot slabs
US4809529A (en) * 1987-10-20 1989-03-07 Topy Kogyo Kabushiki Kaisha Flaring apparatus for flaring a rim element
US4914941A (en) * 1987-03-14 1990-04-10 Omron Tateisi Electronics Co. Power tool for crimping terminal elements for connecting lead wires thereto
US5046344A (en) * 1990-01-19 1991-09-10 United Engineering, Inc. Apparatus for sizing a workpiece
US5452599A (en) * 1993-12-14 1995-09-26 Motor Wheel Corporation Method and apparatus for producing vehicle wheel rims
US20120266642A1 (en) * 2009-10-06 2012-10-25 Ernst Schardt Forming machine for forging, in particular, stretch-forging, workpieces
CN103121300A (zh) * 2011-11-17 2013-05-29 四川康源医疗设备有限公司 用于单冲压片机中调节压力的机构
US11203053B2 (en) * 2019-10-03 2021-12-21 Shyam Newar Peripheral combination hydraulic press to forge and method of manufacturing thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT368728B (de) * 1981-01-21 1982-11-10 Gfm Fertigungstechnik Schmiedemaschine
CN103317072B (zh) * 2013-06-26 2015-04-29 扬州锻压机床股份有限公司 一种热锻造压力机
CN104525651B (zh) * 2014-12-04 2016-06-01 无锡市晶瑜冶金机械有限公司 弯管机
CN112659630B (zh) * 2020-12-17 2023-05-16 滕州市百兴机械有限公司 一种智能液压机行程限位装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135139A (en) * 1959-01-08 1964-06-02 Kralowetz Bruno Forging machine
US3224244A (en) * 1963-05-20 1965-12-21 Kralowetz Bruno Swaging machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135139A (en) * 1959-01-08 1964-06-02 Kralowetz Bruno Forging machine
US3224244A (en) * 1963-05-20 1965-12-21 Kralowetz Bruno Swaging machine

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929000A (en) * 1973-11-15 1975-12-30 Bruno Kralowetz High-speed short-stroke forging press
FR2477439A1 (fr) * 1980-03-04 1981-09-11 Schloemann Siemag Ag Cage refouleuse a cylindres reglables en charge
US4395898A (en) * 1980-03-04 1983-08-02 Sms-Schloemann-Siemag Aktiengesellschaft Adjustment mechanism for edge roller
US4852383A (en) * 1985-11-22 1989-08-01 Kawasaki Steel Corporation Press apparatus for reducing widths of hot slabs
US4760728A (en) * 1985-11-22 1988-08-02 Kawasaki Steel Corporation Method for reducing widths of hot slabs
US4914941A (en) * 1987-03-14 1990-04-10 Omron Tateisi Electronics Co. Power tool for crimping terminal elements for connecting lead wires thereto
US4809529A (en) * 1987-10-20 1989-03-07 Topy Kogyo Kabushiki Kaisha Flaring apparatus for flaring a rim element
US5046344A (en) * 1990-01-19 1991-09-10 United Engineering, Inc. Apparatus for sizing a workpiece
US5452599A (en) * 1993-12-14 1995-09-26 Motor Wheel Corporation Method and apparatus for producing vehicle wheel rims
US20120266642A1 (en) * 2009-10-06 2012-10-25 Ernst Schardt Forming machine for forging, in particular, stretch-forging, workpieces
US9457393B2 (en) * 2009-10-06 2016-10-04 Langenstein & Schemann Gmbh Forming machine for forging, in particular, stretch-forging, workpieces
CN103121300A (zh) * 2011-11-17 2013-05-29 四川康源医疗设备有限公司 用于单冲压片机中调节压力的机构
US11203053B2 (en) * 2019-10-03 2021-12-21 Shyam Newar Peripheral combination hydraulic press to forge and method of manufacturing thereof

Also Published As

Publication number Publication date
DE2319032A1 (de) 1973-12-20
FR2187455A1 (xx) 1974-01-18
GB1370408A (en) 1974-10-16
FR2187455B1 (xx) 1976-05-28
DD103163A5 (xx) 1974-01-12
JPS4943858A (xx) 1974-04-25
AT311768B (de) 1973-12-10
JPS5420703B2 (xx) 1979-07-25

Similar Documents

Publication Publication Date Title
US3834214A (en) Forging press
US3929000A (en) High-speed short-stroke forging press
US3681966A (en) Forging machine
US3494161A (en) Device for stamping metal blanks
US3688540A (en) Tube rolling mill employing a tapered mandrel and a cluster of rolls that each have specially designed tube contacting grooves
US2038795A (en) Releasing means for jammed presses
US3572077A (en) Apparatus for a continuous swaging of rod-shaped workpieces
JPS63203237A (ja) 鍛造プレス成形機械
US3611775A (en) Tube rolling mill with a tapered mandrel
US3844157A (en) Machine for applying force
JP2553447B2 (ja) スエージングマシンにおける加工方法及び装置
US3888104A (en) Forging machine
CN108246938B (zh) 一种连续性平动式压轧机及其压轧方法
US3124019A (en) Cold forming machine
US3165012A (en) Forging machine
JPH0231619B2 (xx)
US2793548A (en) Machine for high-speed forging axialsymmetrical workpieces
US3857147A (en) Method of manufacturing bearing races by rolling
CN104439009A (zh) 轴向闭式辗压成形设备
US6308552B1 (en) Forging machine
CN107902403A (zh) 一种多工位模具的机械手组件
US4191044A (en) Hydraulic screw press
US2446892A (en) Method of shaping bimetallic articles
EP0297312B1 (en) Multipurpose swaging machine
US2260762A (en) Rolling mill