EP0323607B1 - Langschmiedemaschine zum Schmieden von runden oder scharfkantigen Stangen - Google Patents

Langschmiedemaschine zum Schmieden von runden oder scharfkantigen Stangen Download PDF

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Publication number
EP0323607B1
EP0323607B1 EP88121360A EP88121360A EP0323607B1 EP 0323607 B1 EP0323607 B1 EP 0323607B1 EP 88121360 A EP88121360 A EP 88121360A EP 88121360 A EP88121360 A EP 88121360A EP 0323607 B1 EP0323607 B1 EP 0323607B1
Authority
EP
European Patent Office
Prior art keywords
forging
rams
tools
tool
machine
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
EP88121360A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0323607A3 (en
EP0323607A2 (de
Inventor
Hans-Joachim Pahnke
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.)
Pahnke Engineering GmbH and Co KG
Original Assignee
Pahnke Engineering GmbH and Co KG
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 Pahnke Engineering GmbH and Co KG filed Critical Pahnke Engineering GmbH and Co KG
Priority to AT88121360T priority Critical patent/ATE73368T1/de
Publication of EP0323607A2 publication Critical patent/EP0323607A2/de
Publication of EP0323607A3 publication Critical patent/EP0323607A3/de
Application granted granted Critical
Publication of EP0323607B1 publication Critical patent/EP0323607B1/de
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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/06—Swaging presses; Upsetting presses
    • 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 long forging machine for forging round or sharp-edged rods with four star-shaped drive units arranged in a plane running transversely to the forging axis according to the preamble of patent claim 1. Both the synchronized mechanical drive and the hydraulic drive via working cylinders are known as drive units.
  • the tool width is dimensioned in such a way that with a high reduction under rotation of the workpiece can be roughly forged until the tools meet at a workpiece cross section, which in the known design forces the tool to be changed in order to forge the finished cross section.
  • the other design of a purely radial forging machine is designed to move the tools in the same direction across the forging axis, and the more so, the smaller the finished cross section.
  • the tool change takes time, whereas the motorized movement of the tools requires an elaborate mechanism (German utility model 86 23 759).
  • the invention is based on a third type of long forging machine according to the preamble of patent claim 1 or DE-PS 21 59 461, recognizing that this type of construction is a kind of "forge-roll" because of the possible inclined guidance of the tools that deviates from the radial. Process "allowed in the forging process, through which an optimal forging through of the center of the workpiece is guaranteed with the greatest reduction.
  • the optional operation of the forging machine with a straight or curved movement of the tools relative to the center makes it possible to forge both sharp-edged workpieces with square or rectangular cross sections and round bars.
  • the tappets provided with tools are fixed relative to the straight guides of handlebar levers, which force the tools to perform a similar and same-directional pivoting movement in a vertical plane and thus produce a "forging roll movement".
  • the swiveling movement of the tools in the manner of an iris diaphragm it is related that only one tool set is required for the entire working range of the forging machine for round forging (FIGS. 1 and 2). If square or rectangular cross-sections are to be forged in pure radial operation with fixed handlebar levers, tools of this type must also be changed or moved transversely to the forging axis in order to forge small finished cross-sections.
  • the invention has for its object to further develop a radial forging machine of the type described above in such a way that when forging with a straight radial movement of the tools neither a cross-section-dependent tool change nor a shifting of tools across the forging axis is required in order to avoid the collision of synchronously moving tools with small workpiece dimensions to avoid.
  • each handlebar lever can be optionally selected by means of a bolt system which is adjustable transversely to the pivoting direction in aligned bores with a plunger or - with the outer stroke end position of the plunger - lockable with the machine frame.
  • a bolt system which is adjustable transversely to the pivoting direction in aligned bores with a plunger or - with the outer stroke end position of the plunger - lockable with the machine frame.
  • the invention comprises yet another solution to the object, which is that the tools are connected to their plungers via a displacement device and can be displaced by half a tool width in each direction from the symmetrical central position to the direction of force of the drive unit in both directions of the forging axis.
  • This also results in two open-die forging presses working in adjacent vertical planes if the universal process is to be used without changing tools.
  • the tools remain in the central position symmetrical to the direction of force when the roll-forge process is used. Details of the shifting devices are given in claim 6 and explained in more detail in the drawing.
  • the invention provides that the synchronization of a pair of opposing working cylinders can be switched off and the plungers of opposite working cylinders can be adjusted individually or in pairs up to the system of their tools on the forging are. This makes it possible to use an inactivated pair of tools to guide the forging without great effort, while the other pair of tools is working with a fast stroke rate. If opposing working cylinders are placed individually and in opposite directions, their tools can take over a guiding function for parts of the forging located outside the forging axis.
  • Fig. 1 the four tools 1 to 4 of a radial forging machine are shown schematically, which are supported by steering levers, not shown, and carry out pivoting movements during forging, which are represented by arrows.
  • the round material 5 to be forged undergoes a rotary movement, as a result of which surface defects are avoided and optimum forging through of the center of the workpiece is ensured.
  • the round material 5 can be forged with the same tools 1 to 4, for example, up to a small cross section 5 'according to FIG. 2, because the four tools cannot touch each other due to the continued pivoting movement with increasing component in the tangential direction.
  • the forging machine has a frame 6, the front cover 6a of which is cut open in FIG. 3 in order to show two drive units.
  • the forging machine has four drive units arranged in a star shape in a plane running transversely to the forging axis M, each of which consists of a hydraulic working cylinder 7, an articulated connection 8 and a plunger 9. All plungers 9 are guided in straight guides 18a by handlebar levers 18, which are mounted in the cover-side frame parts 6a of the frame 6 via pivot shafts 18b.
  • the top view of the frame cover 6a contained on the left in FIG. 3 shows two bearing caps 18c for further pivot shafts 18b.
  • FIGS. 4 and 5 One of the two task solutions according to the invention is clear from FIGS. 4 and 5. While it is state of the art that the plunger 9 carries tools 10 and 11 (and according to FIG. 3 further tools 12, 13), the handlebar levers 18 and their straight guides 18a each have an additional tool 14 and 15 (and 16 and 17 according to Fig. 3). Each additional tool 14, 15, 16, 17 forms, with a ram-side tool 10, 11, 12, 13, two tool halves lying next to one another parallel to the forging axis M in two vertical planes, which together represent the width, for example, of tools 1 to 4 in FIGS. 1 and 2 the state of the art. These tools are quasi divided into two halves, so that in FIG. 3 tool halves lying side by side are arranged one behind the other. The reference numerals 14, 11, 16 and 13 given in brackets belong to tool halves which are hidden by the tool halves 10, 15, 12 and 17.
  • the plunger 9 and the tool halves 10 and 11 carried by the plungers on the one hand and the handlebar levers provided with the other tool halves 14 and 15 on the other hand are separated from one another by the vertical plane running in the direction of force of the associated drive unit 7 .
  • the plungers 9 receive the remote configuration shown in FIGS. 4 and 5, so that the same forces are always exerted on the tool halves regardless of the forging direction.
  • each plunger 9 can be locked in a form-fitting manner with the associated control arm 18 or with the machine frame 6 or 6a.
  • the cover-side frame parts 6a, the handlebar levers 18 and the plunger 9 are provided with bores to accommodate two cross pin systems.
  • One cross bolt system consists of a locking bolt 19 and two adjusting cylinders 22, 23 provided with adjusting pistons in the cover-side frame parts 6a for alternately transverse displacement of the locking bolt 19 within the plunger 9 and the steering lever 18.
  • the other cross bolt system comprises two coaxial locking bolts 20, 21, each can be moved by actuating pistons 24, 25 of actuating cylinders 26, 27 within the cover-side frame parts 6a and the control arm 18 (see also FIG. 8).
  • the mode of operation of the locking device and thus of the forging machine according to FIG. 3 is as follows:
  • the locking bolt 19 is in the inner locking position in which a plunger 9 is positively locked with a handlebar lever 18 in the region of the straight guide 18 a.
  • the handlebar lever 18 is freely movable since the two locking bolts 20, 21 are in the retracted unlocking position.
  • the forging force applied by the working cylinders 7 is applied to both tool halves, e.g. B. 10 and 14 transmitted, which thus act as a single tool. Since the handlebar levers 18 are free to move, the tools do not perform a linear but a circular pivoting movement.
  • the forging machine is set for forging round material 5 in the roll-forging process (FIG. 6). With this process, rod material is also forged, which should ultimately have a square or rectangular, sharp-edged cross section.
  • the actuating cylinders 22 are acted upon in the sense of extending their piston rod, as a result of which the locking bolts 19 are moved into the stop position shown in FIG. 5.
  • both actuating cylinders 26, 27 are actuated in order to advance the locking bolts 20, 21 into the locking position, as shown in FIG. 5.
  • the handlebar levers 18 are thus positively locked with the cover-side frame parts 6a, whereas the plungers 9 are unlocked.
  • the forging force exerted by the working cylinders 7 acts exclusively on the straight slide and only one half of the tool, e.g. B. Tool half 11 in Fig. 5 and 10 in Fig. 4.
  • the forging machine can be provided with a hydraulic control, by means of which the synchronization of a pair of opposing working cylinders 7 can be switched off in order to employ straight-guided rams 9 until the tools rest on the forging.
  • a hydraulic control by means of which the synchronization of a pair of opposing working cylinders 7 can be switched off in order to employ straight-guided rams 9 until the tools rest on the forging.
  • the actuating cylinders 23, 24 and 25 are actuated, as a result of which the locking bolts 19 are returned to their locking position and the locking bolts 20, 21 to their unlocking position according to FIG. 4. It is understood that in this process, the plunger 9 are controlled to their outer stroke end position so that all holes in parts 6a, 18 and 9 are aligned. This plunger position must also be set if the forging machine is to be switched from one locking position according to FIG. 4 to the other locking position according to FIG. 5.
  • the forging machine in turn has four drive units arranged in a star shape in a plane transverse to the forging axis M with hydraulic working cylinders 7, articulated connections 8, Tappets 29 and handlebar levers 30. All tappets 29 carry one-piece tools 31 which are connected to their tappets via a displacement device.
  • a displacement device consists of an actuating cylinder 32 with alternately extendable piston rods 33, 34, the cylinders 32 being fastened to the plungers 29 and the ends of the piston rods being connected to cross arms 35 (FIG. 9) of a support plate 36 for the tool 31.
  • the actuating cylinders 32 are fastened to the plungers 29 and transmit the forging force exerted by the working cylinders 7 to the support plates 36 together with tools 31. If the tools 31 according to FIG. 8 are set symmetrically to the direction of force F of the working cylinders 7, the forging machine is set to that Roll-forge method, in which the plunger 29 are locked with the freely movable handlebar levers 30 (corresponding to FIG. 4) via locking bolts 37. These locking bolts 37 can be acted on from the inside in order to unlock the plunger 29. In order to lock the control arm 30 with the frame parts 6a on the cover side, the locking bolts 20, 21 are pilot-controlled as in FIG. 5.
  • the plungers 29 perform linear movements in order to use the universal method.
  • opposing tools 31 are displaced in pairs by means of the displacement device 32 to 36 parallel to the forging axis M by half a tool width, as can be seen from FIGS. 9 and 10.
  • the transverse displacement shown in FIG. 9 applies to the opposing tools 10 and 12, which form one of two free-form forging presses, whereas the tools 31 displaced in the opposite direction according to FIG. 10 apply to the tools 11 and 13 of a rear vertical plane correspond and thus form a second freeform forging press.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP88121360A 1988-01-07 1988-12-21 Langschmiedemaschine zum Schmieden von runden oder scharfkantigen Stangen Expired - Lifetime EP0323607B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88121360T ATE73368T1 (de) 1988-01-07 1988-12-21 Langschmiedemaschine zum schmieden von runden oder scharfkantigen stangen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3800220A DE3800220C1 (enrdf_load_stackoverflow) 1988-01-07 1988-01-07
DE3800220 1988-01-07

Publications (3)

Publication Number Publication Date
EP0323607A2 EP0323607A2 (de) 1989-07-12
EP0323607A3 EP0323607A3 (en) 1989-11-29
EP0323607B1 true EP0323607B1 (de) 1992-03-11

Family

ID=6344900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121360A Expired - Lifetime EP0323607B1 (de) 1988-01-07 1988-12-21 Langschmiedemaschine zum Schmieden von runden oder scharfkantigen Stangen

Country Status (7)

Country Link
US (2) US4905495A (enrdf_load_stackoverflow)
EP (1) EP0323607B1 (enrdf_load_stackoverflow)
JP (1) JPH0824986B2 (enrdf_load_stackoverflow)
KR (1) KR910009860B1 (enrdf_load_stackoverflow)
AT (1) ATE73368T1 (enrdf_load_stackoverflow)
DE (1) DE3800220C1 (enrdf_load_stackoverflow)
ES (1) ES2030149T3 (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1325615C (en) * 1988-08-26 1993-12-28 Geoffrey Wilson Treatment of metal slabs
DE4143175A1 (de) * 1991-12-30 1993-07-01 Hasenclever Maschf Sms Schmiedemaschine
DE59100510D1 (de) * 1991-12-30 1993-11-25 Hasenclever Maschf Sms Schmiedemaschine.
DE4143176A1 (de) * 1991-12-30 1993-07-01 Hasenclever Maschf Sms Schmiedemaschine
DE4446580A1 (de) * 1994-12-24 1996-07-04 Pahnke Eng Gmbh & Co Kg Doppelpresse
AT404441B (de) * 1996-09-17 1998-11-25 Gfm Holding Ag Schmiedemaschine
CN101293268B (zh) * 2007-04-24 2010-06-23 湖北大地钎具实业发展有限公司 三缸液压锻造机
US9121240B2 (en) 2012-02-27 2015-09-01 Donald R. Greenlee Hydrostatic setting tool
DE102014211773B4 (de) * 2013-06-24 2018-10-25 Sms Group Gmbh Viersattelpressenwerkzeug und Schmiedepresse
CN107931500A (zh) * 2017-11-14 2018-04-20 江苏海威锻造有限公司 环形支撑式液压径向锻造机
CN114178450B (zh) * 2021-11-23 2024-06-14 内蒙古北方重工业集团有限公司 超细长超高压钢管坯料的加工方法
EP4547419A1 (de) * 2022-06-30 2025-05-07 SMS group GmbH Schmiedestrategie smx

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342021A (en) * 1940-09-20 1944-02-15 Standard Forgings Corp Apparatus for making pierced forged hubs and the like
DE1908362A1 (de) * 1969-02-20 1970-09-10 Sack Gmbh Maschf Schmiedemaschine mit verstellbaren Schmiedesaetteln
DE1917511C3 (de) * 1969-04-05 1974-01-31 Maschinenfabrik Sack Gmbh, 4000 Duesseldorf Hydraulischer Antrieb für Schmiedemaschinen
DE2159461C3 (de) * 1971-12-01 1975-07-17 Maschinenfabrik Sack Gmbh, 4000 Duesseldorf Schmiedemaschine
DE2207717C3 (de) * 1972-02-18 1975-10-16 Maschinenfabrik Sack Gmbh, 4000 Duesseldorf Steuereinrichtung mit hydraulischer Gleichlaufsteuerung für Schmiedemaschinen
US3837209A (en) * 1972-12-04 1974-09-24 R Siegfried Forging machine
SU637184A1 (ru) * 1975-05-04 1978-12-15 Физико-технический институт АН Белорусской ССР Способ ковки поковок
JPS61159224A (ja) * 1984-12-29 1986-07-18 Maru Kikai Kogyo Kk プレスブレ−キの型長さ変換装置
EP0228658B1 (de) * 1986-01-02 1991-03-27 SMS Hasenclever GmbH Schmiedemaschine
DE3607737C1 (de) * 1986-03-08 1987-10-29 Pahnke Eng Gmbh & Co Kg Hydraulisch angetriebene Schmiedemaschine
DE8623759U1 (de) * 1986-09-04 1988-01-07 SMS Hasenclever Maschinenfabrik GmbH, 4000 Düsseldorf Schmiedemaschine

Also Published As

Publication number Publication date
DE3800220C1 (enrdf_load_stackoverflow) 1989-02-02
EP0323607A3 (en) 1989-11-29
EP0323607A2 (de) 1989-07-12
ES2030149T3 (es) 1992-10-16
KR890011641A (ko) 1989-08-21
US4905495A (en) 1990-03-06
JPH0824986B2 (ja) 1996-03-13
ATE73368T1 (de) 1992-03-15
KR910009860B1 (ko) 1991-12-03
US5000026A (en) 1991-03-19
JPH01233036A (ja) 1989-09-18

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