US3533257A - Machines for straightening bars or tubes - Google Patents

Machines for straightening bars or tubes Download PDF

Info

Publication number
US3533257A
US3533257A US735155A US3533257DA US3533257A US 3533257 A US3533257 A US 3533257A US 735155 A US735155 A US 735155A US 3533257D A US3533257D A US 3533257DA US 3533257 A US3533257 A US 3533257A
Authority
US
United States
Prior art keywords
rolls
tube
roll
straightening
pair
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
US735155A
Other languages
English (en)
Inventor
Walter Edward Aldred
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.)
REDMAN TOOLS HOLDING Ltd
Original Assignee
REDMAN TOOLS HOLDING Ltd
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 REDMAN TOOLS HOLDING Ltd filed Critical REDMAN TOOLS HOLDING Ltd
Application granted granted Critical
Publication of US3533257A publication Critical patent/US3533257A/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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/04—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes skew to the path of the work

Definitions

  • a straightening machine for bars or tubes comprises at least three pairs of driven straightening rolls arranged in line along the path of the bar or tube to be straightened, and means for offsetting the centre pair of rolls from the outer pairs of rolls, one of the rolls of each pair being urged towards the other roll of the pair by an hydraulic jack, the hydraulic pressure of which jack is capable of being set by a pressure relief valve associated with the jack whereby any excess loading will cause the relief valve to lift and will hence prevent an increase of the predetermined hydraulic pressure on the bar or tube being straightened.
  • This invention relates to machines for straightening bars or tubes.
  • a straightening machine for bars or tubes comprises at least three pairs of driven straightening rolls arranged in line along the path of the bar or tube to be straightened, means for raising and lowering one of the rolls of each pair relatively to the other roll, means for raising and lowering the centre pair of rolls, in unison, into and out of the path of the bar or tube to be straightened to offset the centre pair of rolls from the outer pairs of rolls and means for arranging the rolls of each pair of rolls so that the bar or tube is rotated as it passes longitudinally therebetween, characterised in that one of the rolls of each pair is urged towards the other roll of the pair by a hydraulic jack, the hydraulic pressure of which jack is capable of being set by a pressure relief valve associated with the jack whereby any excess loading will cause the relief valve to lift and will hence prevent an increase of the predetermined hydraulic pressure on the bar or tube being straightened. It is found that this method of urging the rolls of each pair towards each other and hence into contact with the bar or tube being straightened, prevents damage to the tube
  • each pair of rolls there is an hydraulic jack for urging the upper roll towards the associated lower roll.
  • each said hydraulic jack is provided with a high load cylinder and a low load cylinder one of which may be selected for the application of hydraulic pressure on the bar or tube being straightened and both of which are provided with their separate pressure relief valves.
  • a second hydraulic jack is provided for moving the lower roll vertically out of alignment with the lower rolls of the outer pairs of rolls, the centre lower roll being linked to its respective upper roll whereby the said second hydraulic jack moves the linked rolls in unison so that the gap therebetween is maintained constant.
  • a further feature of the invention is that the deflection of the path of the bar or tube being straightened which is effected by offsetting the centre pair of rolls from the outer pair of rolls, is applied prior to the passage of a bar or tube between the rollers, or during the passage of 3,533,257 Patented Got. 13, 1970 a bar or tube between the rolls and subsequently to the leading end of the bar or tube passing through the centre pair of rolls.
  • Adjustable mechanical stops are preferably provided for limiting the movement of each vertically movable roll towards its associated roll, which stops are preferably provided by the means for raising and lowering the respective roll.
  • FIG. 1 is an elevation of a tube straightening machine
  • FIG. 2 is a sectional elevation of one of the outer top straightening rolls of the machine shown in FIG. 1;
  • FIG. 3 is an elevation of the centre pair of straightening rolls of the machine shown in FIG. 1;
  • FIG. 4 is a sectional elevation of the hydraulic means for operating the bottom straightening roll shown in FIG. 3;
  • FIG. 5 is a diagram of the hydraulic circuit of the machine shown in FIG. 1.
  • the tube straightening machine comprises three pairs of opposed straightening rolls 10, 11; 12, 13; 14, 15 located one pair after the other along the path of the tube 9 being straightened.
  • the top three rolls 10, 12, 14 are driven by an electric motor 16, whilst the bottom three rolls 11, 1.3, 15 are driven by another electric motor 19.
  • the machine is also provided with a pair of pinch rolls 17, 18 to pass the tubes being straightened into the first pair of straightening rolls 10, 11. These pinch rolls are driven by an electric motor 20.
  • Each roll 10 to 15 and 17, 18 is a paraboloid and is adjusted angularly to the path of the tube being straightened so that the tube is rotated as it is passed between the rolls and so that there is the maximum surface contact between the rolls and between the tube being straightened.
  • Each of the bottom rolls .11, 15, 18 is fixed in height but the position of each of the other rolls, including the bottom roll 13, is adjustable vertically by means described below. The spacing between each pair of rolls may thus be adjusted to suit different diameters of tube, and is recorded on the associated dial 8.
  • the centre pair of straightened rolls 12, 13 may also be moved vertically, in unison, to effect a deflection of the path of the tube being straightened. As described below, this deflection may be applied either before or after the tube is passed between these rolls 12, 13.
  • Mechanical stops are provided, in the manner described below, to locate the required position of each roll, and each roll is maintained against its particular stop by an hydraulic jack. Adjustment of the positions of these mechanical stops can take place either before or during the passage of a length of tube between the pairs of rolls.
  • a driven conveyor 22, 23 for conveying each tube of a bundle of tubes, in succession, to the pinch rolls 17, 18 and for conveying the straightened tubes away from the machine respectively.
  • Sonic beam devices (not shown) are provided after or downstream of the pinch rolls and after or downstream of the last pair of straightening rolls, the purpose of which is described below.
  • the spacing between the three pairs of straightening rolls and the angular relationship of the rolls of the path of the tubes to be straightened are set to suit the particular diameter of the tubes.
  • the conveyor at the leading end of the machine is operated to drive one of the tubes between the pinch rolls 17, 18.
  • the first-mentioned sonic beam is then blocked to close the top pinch roll onto the tube.
  • the pinch rolls then drive the tube through a bell-shaped guide 21 and Oct. 13, 1970 w. E.
  • the piston rod 54 may thus be raised and lowered in like manner to the piston rods associated with the upper straightening rolls.
  • the contacting surfaces which comprise its mechanical stop are the underside of the piston 55 and the top side of the base plate 53 of the cylinder 52. These surfaces are maintained in contact during normal working by the introduction of oil at a pre-set pressure into the cylinder above the piston 55. However, if excess pressure is ap plied to the roll 13 by e.g. an oversize tube, an asso ciated relief valve (see FIG. 5) is opened to allow a quantity of oil to flow out of the cylinder 52 to tank and hence to allow the said contacting surfaces to separate. The load in the cylinder 52 is thus maintained constant.
  • the centre straightening rolls 12, 13 are vertically movable in unison to offset the rolls from the outer pairs of straightening rolls and hence to apply a deflection to the path of the tube being straightened.
  • the means provided for this purpose comprise a parallel linkage mechanism comprising levers 70, 71 pivotally mounted about horizontal spindles 72, 73 respectively.
  • One end of lever 70 is fixed to the wormwheel 41 associated with the upper centre roll 12 and one end of lever 71 is fixed to the wormwheel 61 associated with the lower centre roll 13, the other ends of the levers being pivotally connected by a link 74.
  • Pump P1 which is capable of feeding oil at high pressure (e.g. 4480 lb./ sq. in.) to the cylinders of the straightening rolls 10, 12, 13, 14 is mechanically coupled to pump P2 which is capable of feeding oil at low pressure (eg 1000 lb./sq. in.) to the annulus 48 below the piston 46 of each of the low load cylinders 47. Oil is continually fed to each annulus 48 during periods of operation to ensure that the pistons 46 remain lifted.
  • the pumps P1, P2 are driven by an electric motor E1.
  • the third pump P3 is capable of feeding oil at high pressure to the cylinder 66 of the upper pinch roll 17 and also to the cylinder 52 associated with the lower centre straightening roll 13.
  • This pump P3 is separately driven by an electric motor E2.
  • the cylinder 52 of the lower centre straightening roll 13 is thus fed with oil by both pumps P1, P3.
  • a three-way valve V1 controlled by a selector switch enables the operator to use either the high load or the low load cylinders, the selection being in accordance with the tube diameter and thickness, and with the material tensile stress. These parameters, together with the tube condition, enable the operator to select the most desirable load.
  • This valve V1 is solenoid pilot operated, a pilot pressure being applied through a reducer valve V8.
  • Accumulators A1, A2A are provided in the circuits for the high load and low load cylinders respectively to allow for oil fluctuations.
  • a further accumulator A2B is provided in the circuit for the cylinder 52 of the lower centre straightening roll, the accumulator being connected into its circuit via a speed control valve VC which controls the speed of flow of oil into the circuit by a needle valve and permits free flow into the accumulator.
  • the circuit for the low load cylinders is safe-guarded by a general relief valve V16A set at a high pressure in the case of very large overloads, or by a control valve V12A in conjunction with a speed control valve V10A in the case of normal overloads.
  • This speed control valve V10A has a free flow towards the low load cylinders but a needle valve to control the speed of any flow of oil from the cylinders.
  • the circuit for the high load cylinders is protected by a general relief valve V16B set at high pressure or by a control valve V12B in conjunction with a speed control valve V10B.
  • the function of these speed control valves V10A, V10B is to prevent the pistons 37 from falling at an uncontrolled rate when the pressure from them is removed.
  • a check valve V11 is provided in the circuit to the high load cylinders to operate as a pre-fill valve.
  • deflection of the path of the tube to be straightened is effected by operation of the cylinder 52 associated with the lower centre straightening roll 13, the upper centre straightening roll 12 moving in unison therewith.
  • this cylinder 52 is operated by the supply from pump P1 on the same supply circuit as the high load cylinders of the upper straightening rolls 10, 12, 14, to effect a deflection of the tube path which may be pre-set permanently, i.e. for a number of tubes, or which may be brought on temporarily, i.e. during the passage of each tube through the machine. Either of these operations may be performed automatically or manually by a second selector switch provided for this purpose.
  • this switch When this switch is in the manual position, the operator may still either select permanent deflection or temporary deflection by operation of the first selector switch. If this first selector switch is in the position for temporary deflection, the operator may apply the deflection by operation of a push-button but the button is so interlocked that the cylinder 52 cannot become operative until, as described above, the leading end of the tube being straightened has entered the last pair of straightening rolls '14, 15. The cylinder 52. will be returned to the down position before the machine can accept the next tube to be straightened.
  • pump P3 is operative to feed oil to both the cylinders 52, 66 of the lower centre straightening roll 13 and of the upper pinch roll 17 respectively.
  • Suitable solenoid-operated direction valves V21 and V4 are provided for this purpose.
  • a further solenoid-operated direction valve V18 is provided to allow both pumps P1, P3 to supply oil at high pressure to the cylinder 52 of the lower centre straightening roll 13, which valve is situated at the junction of the feed lines to the cylinder 52 from the pumps P1, P3.
  • One important advantage of the hydraulically operated straightening machine described above is that means are provided for precluding oversize tubes from applying increased loads to the straightening rolls thereby risking damage to the tube or to the machine.
  • the deflection of the centre pair of straightening rolls may, as described above, be permanent for the duration of straightening a plurality of tubes or only temporary whereby the deflection is eifected and removed for each tube in turn.
  • This latter feature of the invention is extremely important since it allows the deflection to be effected after the leading end of the tube has entered the machine and avoids the necessity of attempting to pass a tube with a bent leading end along a path that is not straight, i.e. a path in which the centre pair of rolls are offset from the two outer pairs of rolls.
  • deflection could be set by lowering the centre pair of rolls instead of raising them.
  • a straightening machine for bars or tubes comprising at least three pairs of driven straightening rolls arranged in line along the path of the bar or tube to be straightened, means for raising and lowering one of the rolls of each pair relatively to the other roll, means for raising and lowering the centre pair of rolls, in unison, into and out of the path of the bar or tube to be straightened to offset the centre pair of rolls from the outer pairs of rolls and means for arranging the rolls of each pair of rolls so that the bar or tube is rotated as it passes longitudinally therebetween, characterised in that one of the rolls of each pair is urged towards the other roll of the pair by a hydraulic jack, the hydraulic pressure of which jack is capable of being set by a pressure relief valve associated with the jack whereby any excess loading will cause the relief valve to lift and will hence prevent an increase of the predetermined hydraulic pressure on the bar or tube being straightened.
  • a machine as claimed in claim 1 in which the hydraulic jack associated with each of the outer pairs of rolls is capable of urging the upper roll of the respective pair of rolls towards the respective lower roll and hence into contact with the bar or tube being straightened.
  • each hydraulic jack associated with the outer upper rolls is provided with a high load cylinder and a low load cylinder one of which may be selected for the application of hydraulic pressure on the bar or tube being straightened and both of which are provided with their separate pressure relief valves.
  • a machine as claimed in claim 1 in which for the centre pair of rolls there is provided a hydraulic jack for urging the upper roll towards the lower roll and hence into contact with the bar or tube being straightened and a second hydraulic jack for moving the lower roll vertically out of alignment with the lower rolls of the outer pairs of rolls, the centre lower roll being linked to its respective upper roll whereby the said second hydraulic jack moves the linked rolls in unison so that the gap therebetween is maintained constant.
  • a machine as claimed in claim 4 in which the jack associated with the upper centre roll is provided with a high load cylinder and a low load cylinder one of which may be selected for the application of hydraulic pressure on the bar or tube being straightened and both of which are provided with their separate pressure relief valves.
  • a machine as claimed in claim 1 in which the deflection of the path of the bar or tube being straightened, which is effected by offsetting the centre pair of rolls from the outer pairs of rolls, is applied prior to the passage of a bar or tube between the rolls.
  • a machine as claimed in claim 1 in which the deflection of the path of the bar or tube being straightened, which is effected by offsetting the centre pair of rolls from the outer pair of rolls, is applied during the passage of a bar or tube between the rolls and subsequently to the leading end of the bar or tube passing through the centre pair of rolls.
  • a machine as claimed in claim 1 in which adjustable mechanical stops are provided for limiting the movement of each vertically movable roll towards its associated roll and in which the mechanical stop for each movable roll is provided by the means for raising and lowering the respective roll.
  • a machine as claimed in claim 1 in which there are a pair of driven pinch rolls for feeding a bar or tube into the straightening rolls, means for raising and lower ing one of the pinch rolls relatively to the other pinch roll and a hydraulic jack for urging the movable pinch roll towards the other pinch roll.
  • a machine as claimed in claim 10 in which means are provided for lifting the movable pinch roll on entry of the leading end of a bar or tube being straightened into the first pair of straightening rolls with respect to the direction of movement of the bar or tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Wire Processing (AREA)
US735155A 1967-06-09 1968-06-06 Machines for straightening bars or tubes Expired - Lifetime US3533257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2678467 1967-06-09

Publications (1)

Publication Number Publication Date
US3533257A true US3533257A (en) 1970-10-13

Family

ID=10249141

Family Applications (1)

Application Number Title Priority Date Filing Date
US735155A Expired - Lifetime US3533257A (en) 1967-06-09 1968-06-06 Machines for straightening bars or tubes

Country Status (3)

Country Link
US (1) US3533257A (enrdf_load_stackoverflow)
DE (1) DE1752511A1 (enrdf_load_stackoverflow)
GB (1) GB1231383A (enrdf_load_stackoverflow)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3706214A (en) * 1970-11-23 1972-12-19 Meeco Inc Adjustable guide holder assembly
US3706215A (en) * 1971-02-19 1972-12-19 Herbert D Horton Rotary pipe straightener
FR2163737A1 (enrdf_load_stackoverflow) * 1971-12-16 1973-07-27 Western Electric Co
US3759077A (en) * 1970-10-17 1973-09-18 Kieserling & Albrecht Method and apparatus for feeding elongated rotary workpieces in straightening machines or the like
FR2189136A1 (enrdf_load_stackoverflow) * 1972-06-21 1974-01-25 Wyko Equipment Ltd
US3911708A (en) * 1973-06-08 1975-10-14 Kieserling & Albrecht Apparatus for straightening long metal workpieces
US4471639A (en) * 1982-11-01 1984-09-18 E. W. Bliss Company, Inc. Roll orientation control system for straightening machines
WO1986002294A1 (en) * 1984-10-15 1986-04-24 Nilsson Einar W Straightening machines and methods
US4640115A (en) * 1984-07-03 1987-02-03 Benteler-Werke Ag Straightening device
EP0201660A3 (en) * 1985-05-13 1987-09-09 Th. Kieserling & Albrecht Gmbh & Co. Roller straigthening machine for elongated work pieces
US4711112A (en) * 1981-07-06 1987-12-08 Nilsson Einar W Straightening machines and methods
US5014533A (en) * 1987-06-03 1991-05-14 Ergon S.A. Wire processing machine
US20030024988A1 (en) * 2000-04-24 2003-02-06 David Stanard System for providing evidence of payment
CN100584478C (zh) * 2005-08-22 2010-01-27 西安重型机械研究所 液压动态恒压矫直方法
CN108160840A (zh) * 2017-12-29 2018-06-15 石家庄钢铁有限责任公司 一种矫直机棒材对中导向装置
CN110346215A (zh) * 2018-04-08 2019-10-18 吉林启星铝业有限公司 一种铝合金钻杆矫直及全尺寸负载检测系统
CN111475896A (zh) * 2020-04-14 2020-07-31 太原科技大学 一种棒材矫直应力中性层位置确定方法
CN114233700A (zh) * 2021-12-22 2022-03-25 合肥合锻智能制造股份有限公司 一种大流量多功能操作方式切换的液压控制系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57500326A (enrdf_load_stackoverflow) * 1980-03-26 1982-02-25
JPS5744624U (enrdf_load_stackoverflow) * 1980-08-21 1982-03-11
EP0411167B1 (de) * 1989-07-29 1993-11-18 Hans Lindemann Schäl- und Richtmaschinenanlage zur Bearbeitung stangenförmigen Gutes wie Wellen, Draht und Rohren od. dgl.
IT1254783B (it) * 1992-02-12 1995-10-11 Innse Innocenti Engineering Sp Macchina per il raddrizzamento di tubi

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2319785A (en) * 1940-08-04 1943-05-25 Abramsen Gudrun Cross roll apparatus
US2517344A (en) * 1948-02-27 1950-08-01 Bigwood Joshua & Son Ltd Machine for straightening rods or tubes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2319785A (en) * 1940-08-04 1943-05-25 Abramsen Gudrun Cross roll apparatus
US2517344A (en) * 1948-02-27 1950-08-01 Bigwood Joshua & Son Ltd Machine for straightening rods or tubes

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759077A (en) * 1970-10-17 1973-09-18 Kieserling & Albrecht Method and apparatus for feeding elongated rotary workpieces in straightening machines or the like
US3706214A (en) * 1970-11-23 1972-12-19 Meeco Inc Adjustable guide holder assembly
US3706215A (en) * 1971-02-19 1972-12-19 Herbert D Horton Rotary pipe straightener
FR2163737A1 (enrdf_load_stackoverflow) * 1971-12-16 1973-07-27 Western Electric Co
FR2189136A1 (enrdf_load_stackoverflow) * 1972-06-21 1974-01-25 Wyko Equipment Ltd
US3911708A (en) * 1973-06-08 1975-10-14 Kieserling & Albrecht Apparatus for straightening long metal workpieces
US4711112A (en) * 1981-07-06 1987-12-08 Nilsson Einar W Straightening machines and methods
US4471639A (en) * 1982-11-01 1984-09-18 E. W. Bliss Company, Inc. Roll orientation control system for straightening machines
US4640115A (en) * 1984-07-03 1987-02-03 Benteler-Werke Ag Straightening device
WO1986002294A1 (en) * 1984-10-15 1986-04-24 Nilsson Einar W Straightening machines and methods
EP0201660A3 (en) * 1985-05-13 1987-09-09 Th. Kieserling & Albrecht Gmbh & Co. Roller straigthening machine for elongated work pieces
US5014533A (en) * 1987-06-03 1991-05-14 Ergon S.A. Wire processing machine
US20030024988A1 (en) * 2000-04-24 2003-02-06 David Stanard System for providing evidence of payment
CN100584478C (zh) * 2005-08-22 2010-01-27 西安重型机械研究所 液压动态恒压矫直方法
CN108160840A (zh) * 2017-12-29 2018-06-15 石家庄钢铁有限责任公司 一种矫直机棒材对中导向装置
CN108160840B (zh) * 2017-12-29 2023-11-21 石家庄钢铁有限责任公司 一种矫直机棒材对中导向装置
CN110346215A (zh) * 2018-04-08 2019-10-18 吉林启星铝业有限公司 一种铝合金钻杆矫直及全尺寸负载检测系统
CN111475896A (zh) * 2020-04-14 2020-07-31 太原科技大学 一种棒材矫直应力中性层位置确定方法
CN111475896B (zh) * 2020-04-14 2023-04-21 太原科技大学 一种棒材矫直应力中性层位置确定方法
CN114233700A (zh) * 2021-12-22 2022-03-25 合肥合锻智能制造股份有限公司 一种大流量多功能操作方式切换的液压控制系统
CN114233700B (zh) * 2021-12-22 2023-12-26 合肥合锻智能制造股份有限公司 一种液压控制系统

Also Published As

Publication number Publication date
GB1231383A (enrdf_load_stackoverflow) 1971-05-12
DE1752511A1 (de) 1971-06-03

Similar Documents

Publication Publication Date Title
US3533257A (en) Machines for straightening bars or tubes
DE948139C (de) Stapelmaschine fuer blattfoermiges Material, besonders fuer Haeute und Felle
DE1910879C3 (de) Richtmaschine für langgestreckte Werkstücke runden Querschnitts
US2343899A (en) Strip feeding mechanism
DE1054953B (de) Kalander
US3302437A (en) Tension control
US2742144A (en) Continuous drawing of stock
DE2253755A1 (de) Vorrichtung zum automatischen horizontalen anordnen eines fahrzeugs zum handhaben von lasten
DE1927686A1 (de) Vorrichtung zum Stapeln von Gegenstaenden
US3127981A (en) Reciprocating pusher-type conveyor
DE2261176C3 (de) Vorrichtung zum Erfassen der Zugspannung von zwischen einzelnen Walzgerüsten eines Walzwerkes laufendem strangförmigen Material und zum Verändern der Geschwindigkeit der Walzen der einzelnen Walzgerüste
DE1919266C3 (de) Steinsäge mit zwei Sägeblättern
EP0530436B1 (en) Twist-forming press for crank shaft or the like
DE928362C (de) Spinn- oder Zwirnmaschine mit hydraulischem Antrieb der Changiervorrichtung
DE1458240C3 (de) Einer Stranggießkokille nachgeschaltete Strangtransporteinrichtung
US2336349A (en) Shaft straightening press
US3034560A (en) Swinging arm type stretch and wipe forming machine
US3192962A (en) Method of making hinged two piece wire fabric
US2544478A (en) Handling and payoff apparatus for coiled strand material
DE1198057B (de) Mehretagenpresse mit gleichzeitig zu oeffnenden bzw. zu schliessenden Etagen
DE686500C (de) Tisch fuer Naehmaschinen
US1449413A (en) Metal-working machine
DE942505C (de) Einstellvorrichtung fuer Metallstreifen-Walzwerke, die aus zwei Walzen bestehen
DD140770A5 (de) Anordnung zum abstuetzen der waschtrommel einer trommelwaschmaschine
DE194913C (enrdf_load_stackoverflow)