US3626732A - Straightening machine for metallic bars or the like - Google Patents

Straightening machine for metallic bars or the like Download PDF

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Publication number
US3626732A
US3626732A US13614A US3626732DA US3626732A US 3626732 A US3626732 A US 3626732A US 13614 A US13614 A US 13614A US 3626732D A US3626732D A US 3626732DA US 3626732 A US3626732 A US 3626732A
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United States
Prior art keywords
straightening
workpieces
rolls
section
circular cross
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Expired - Lifetime
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US13614A
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English (en)
Inventor
Erich Krafft
Heinz Hartkopf
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TH Kieserling and Albrecht GmbH and Co
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TH Kieserling and Albrecht GmbH and Co
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    • 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

  • the cylinder can receive pressurized oil from a pump by -way of a first solenoid-operated valve which can effect rapid movements of the lower roll to and from retracted position, and from an accumulator by way of a second solenoid operated valve which can admit highly pressurized oil to urge the lower roll toward the upper roll during treatment of workpieces of other than circular cross section.
  • the present invention relates to straightening machines for metallic bars, tubes or analogous elongated workpieces. More particularly, the invention relates to improvements in straightening machines which can be used for treatment of workpieces having a circular or other than circular cross section.
  • a machine for straightening of truly cylindrical workpieces in the form of bars or tubes normally comprises upper and lower straightening rolls which are fixed at a desired distance from each other and cannot yield when their peripheral surfaces engage and treat a travelling workpiece.
  • Such workpieces normally include drawn or shaved tubes or bars.
  • the rolls of a machine for straightening of rolled billets or other workpieces whose cross section is out of round are mounted in such a way that one roll of each pair of rolls can yield and to thus allow for changes in the width of the passage wherein the workpiece moves lengthwise while rotating about its own axis.
  • a drawback of such machines is that they are not suited for straightening of relatively stiff cylindrical workpieces. This is due to the fact that the pneumatic force furnished by compressed gaseous fluid does not sufiice to insure proper retention of upper rolls during straightening of a tube or bar having a circular cross section.
  • the provision of pneumatically biased pistons as a means for carrying the upper rolls is actually a mere safety measure but the number of uses to which such a machine can be put with reasonable effectiveness is quite limited.
  • An object of the invention is to provide a versatile straightening machine which is equally suited for straightening of cylindrical and for straightening of non-cylindrical stock.
  • Another object of the invention is to provide a straightening machine which can be rapidly and conveniently converted from treatment of cylindrical stock to treatment of non-cylindrical stock or vice versa.
  • a further object of the invention is to provide a machine wherein the force with which the straightening rolls engage a workpiece of other than circular cross-section can be regulated in the course of a straightening operatlon.
  • An additional object of the invention is to provide a machine which is capable of straightening lightweight as well as heavy and rigid stock of circular or other than circular cross section.
  • Still another object of the invention is to provide novel and improved mounting means for the rolls of a straightening machine for cylindrical or non-cylindrical stock.
  • An ancillary object of the invention is to provide novel biasing means for applying pressure to movable rolls in a straightening machine.
  • the invention is embodied in a machine for straightening of elongated workpieces of circular and other than circular cross section.
  • the machine comprises a rigid housing, at least one pair of driven rotary straightening members defining a passage for workpieces, first mounting means provided in the housing for one of the straightening members and arranged to normally hold the one member against movement away from the other member, and second mounting means provided in the housing for the other straightening member.
  • the second mounting means includes a carrier which is movable with the other member relative to the one member to and from a retracted position in which the housing prevents further movement of the other member away from the one member so that the machine is ready to treat workpieces of circular cross section, and hydraulic biasing means operable to yieldably urge the carrier away from the retracted position so that the straightening members are then ready to treat workpieces of other than circular cross section.
  • the biasing means preferably comprises a double-acting cylinder which is mounted in the housing, a piston which is reciprocable in the cylinder and is operatively connected with the carrier, at first source of pressurized hydraulic fluid, a first solenoid-operated valve which can connect the first source with the one or the other chamber of the cylinder to effect rapid movements of the carrier between the retracted position and a foremost position in which the other member is nearest to the one member, a
  • second source of pressurized fluid which preferably maintains the fluid at a pressure exceeding that of fluid which is supplied by the first source, and a second solenoidoperated valve which can admit fluid from the second source into that chamber of the cylinder wherein the fluid causes the carrier to move away from retracted position so that the other member is biased with great force against a workpiece of other than circular cross section.
  • FIG. 1 is a fragmentary schematic partly elevational and partly sectional view of a straightening machine which embodies one form of the invention.
  • FIG. 2 is a diagrammatic view of the hydraulic biasing means in the machine of FIG. 1.
  • the straightening machine of FIG. 1 comprises a housing or main support including an upper traverse 9, a lower traverse 14 and upright columns 13 connecting the two traverses.
  • the upper traverse 9 supports a first straightening member here shown as a roll 1 whose frame or holder 1a is turnable about the axis of a vertical pivot member 5 extending through a sleeve 6 which is mounted in a plate 7.
  • the roll 1 is connected with a drive shaft 3 by way of a universal joint 3a which permits the frame 1a to turn on the pivot member 5.
  • the latter is a Screw which is in threaded engagement with the frame In.
  • the motor which drives the shaft 3 is not shown in the drawing.
  • the means for turning the frame 1a about the axis of the pivot member 5 is of known design and is not shown in FIG. 1. Such turning of the frame It: is necessary to place the roll 1 into an optimum position with reference to the workpiece 40.
  • the plate 7 and the frame 1a constitute a mounting means for the roll 1.
  • the plate 7 is movable up and down with reference to the upper traverse 9 by means of a displacing mechanism which includes several pushers or plungers 8 (only one shown) reciprocably guided in the traverse 9 and having internal threads mating with external threads 10a of spindles 10 which are rotatable in but cannot move axially of the traverse 9.
  • the traverse 9 includes a plate 11 through which the spindles 10 extend and which is flanked by flanges 10b of spindles 10 from below and by worm wheels 12 from above.
  • worm wheels are rigid with the respective spindles 10 and mesh with worms (not shown) which can be rotated by hand or by means of a motor to thereby move the plate 7 up or down and to thus select the width of the passage P between the roll 1 and a lower straightening roll 2 which is supported by the lower traverse 14.
  • the roll 2 is driven by a shaft 4 and its frame or holder 2a is movable up and down, i.e., toward and away from the roll 1.
  • the plate-like carrier 18 for the frame 2a assumes a retracted position and rests directly on the traverse 14 so that the roll 2 cannot yield and the workpiece must pass through a passage P of predetermined cross-sectional area.
  • Such retracted position of the carrier 18 is shown in FIG. 1.
  • the carrier 18 and frame 2a constitute a mounting means for the lower straightening roll 21
  • the carrier 18 is movable up and down with reference to the traverse 14 when the rolls 1, 2 are replaced with rolls which serve to straighten elongated stock of other than circular cross section, for example, for straightening of rolled billets.
  • the means for biasing the carrier 18 upwardly from its retracted position comprises a double-acting cylinder 17 which is pivotably mounted in the traverse 14 below the roll 2 and accommodates a piston 16 whose piston rod 16a carries a slide 15 which is movable up and down in suitable guide means provided therefor in the traverse 14.
  • the carrier 18 constitutes the cover of the slide 15 and is secured thereto by bolts, screws or other suitable fasteners.
  • the lower traverse 14 includes a transversely extending portion or beam 14a which also serves as a guide for the slide 15 and further supports a vertical centering pin 19 for the frame 2a.
  • the pin 19 extends through a hole of the carrier 18.
  • the beam 14a further supports a vertically adjustable stop member 2t) which meshes with the beam and has a worm wheel 20:! meshing with a worm 21.
  • FlG. 2 illustrates the hydraulic circuit of the biasing means for the roll 2.
  • a reservoir or tank T for oil or other hydraulic fluid can supply fluid to two pumps 23, 24 which are driven by an electric motor 22.
  • the pump 23 constitutes a first source of pressurized fluid and can force such fluid into a first supply conduit 35 provided with a check valve 47 and connected to a first adjustable solenoid-operated valve S1.
  • the latter is connected to the chambers 17a, 17b of the double-acting cylinder 17 by conduits 36, 38.
  • the valve S1 can seal the supply conduit 35 from the conduits 36, 38 and then delivers fluid to a return line 39.
  • a pressure relief valve 37 can be actuated to adjust the fluid pressure in the supply conduit 35.
  • a second adjustable solenoid-operated valve S2 is installed in a second supply conduit 42 which is connected with the pump 24 through a check valve 46 and with a second source of pressurized fluid here shown as a diaphragm accumulator 44.
  • the valve S2 can admit pressurized fluid from the accumulator 44 to the cylinder chamber 17a by way of a conduit 43.
  • a pressure relief valve 45 can be actuated to adjust the fluid pressure in the supply conduit 42, and a conduit 48 connects the supply conduit 42 with a third solenoid-operated valve S3 which is connected with the tank T by a return line 50 and can admit pressurized fluid to a pressure gauge 49 in response to actuation of a knob 51.
  • the parts S3 and 4851 constitute a device which monitors the pressure of fluid in the accumulator 44.
  • the operation of valves S1 and S2 is regulated by a detector 41 (e.g., an inductor coil shown in FIG. 1) which produces signals in response to the presence or absence of a workpiece 40 in the adjacent portion of the path for workpieces.
  • a detector 41 e.g., an inductor coil shown in FIG. 1
  • the frame 2a for the lower roll 2 is rigidly supported by the housing of the machine because the carrier 18 abuts directly against the adjacent portion of the lower traverse 14.
  • the motor 22 is thereupon started to drive the pumps 23, 24 and the valve S1 is adjusted to connect the supply conduit 35 with the conduit 36 so that the piston 16 moves upwardly to the extent permitted by the stop pin 20.
  • the pressure of fluid in the supply conduit 35 is selected by the valve 37; for example, such pressure may be in the range of 25 atmospheres super-atmospheric pressure.
  • the upward movement of the piston 16 is terminated when the top face 15a of the slide 15 abuts against the portion 20a of the stop pin 20.
  • the worm wheels 12 in the upper traverse 9 are rotated to move the carrier 7 up or down so as to place the upper straightening roll 1 at an optimum distance from the lower roll 2.
  • the distance is normally selected in such a way that the width of the passage P between the rolls 1, 2 is slightly less than the minimum transverse dimension of the non-circular workpiece.
  • valve S1 is thereupon adjusted to connect the supply conduit 35 with the conduit 38 whereby the piston 16 descends and the roll 2 moves downwardly and away from the roll 1.
  • the conduit 38 communicates with the supply conduit 35, the conduit 36 can discharge fluid into the return line 39.
  • the downward movement of the piston 16 is terminated when the slide returns to the retracted position shown in FIG. 1.
  • a workpiece 40 is thereupon fed toward the passage P between the rolls 1, 2 (in a direction from the left to the right, as viewed in FIG. 1) whereby its leading end reaches the detector coil 41.
  • the advancing means which feeds the workpiece 40 toward the rolls 1, 2 preferably comprises pairs of driven advancing rollers (not shown) of any known design.
  • the detector coil 41 thereupon automatically regulates the operation of valves S1, S2 in a manner as disclosed, for example, in German Utility Model No. 1,885,761.
  • the electric circuit of the coil 41 and valvesSl, S2 further includes suitable time delay relays.
  • the coil 41 causes the valve S1 to connect the supply conduit with the conduit 36 when the leading end of the workpiece 40 reaches or approaches the position shown in FIG. 1.
  • the piston 16 then moves upwardly and the lower roll 2 is biased against the advancing workpiece.
  • the coil 41 also adjusts the valve S2 substantially simultaneously with adjustment of the valve S1 so that the conduit 43 is connected with the second supply conduit 42 wherein the fluid pressure exceeds that in the supply conduit 35 because the pressure relief valve is set in such a way that the fluid pressure in accumulator 44 exceeds the fluid pressure in the supply conduit 35.
  • the supply conduit 35 delivers fluid which is used to rapidly move the lower straightening roll 2 toward or away from the upper roll 1
  • the fluid in the accumulator 44 can supply such pressure which is to be maintained in the lower cylinder chamber 17a in the course of a straightening operation.
  • the valve 45 is preferably of the type which can select an infinite number of fluid pressures in the accumulator 44 and supply conduit 42.
  • valve S1 connects the supply conduit 35 with the conduit 38 and the conduit 36 with the return line 39.
  • valve S2 is adjusted to assume the position shown in FIG. 2 in which the supply conduit 42 is sealed from the conduit 43 and cylinder chamber 17a.
  • the pump 24 delivers to the accumulator 44 fresh fluid by way of the check valve 46 to replace the fluid which was fed into the chamber 17a.
  • the pump 23 remains in operation and delivers fluid to the conduit 35; when the piston 16 returns to its lower end position, the fluid delivered by pump 23 opens the valve 37 and returns to the tank T.
  • the knob 51 can be actuated whenever the operator so desires to thereby connect the conduit 48 (and hence the accumulator 44) with pressure gauge 49'. In this way, the operator can monitor the fluid pressure in the course of a straightening operation.
  • the gauge 49 is connected with the return line and is sealed from the supply conduit 42. If the pressure indicated by the gauge 49 is unsatisfactory, the operator changes the setting of the pressure relief valve 45.
  • a fresh cycle is started as soon as the leading end of the next-following workpiece enters or approaches the detector coil 41. It is clear that other types of detector means can be used with equal advantage as well as that the hydraulic circuit of FIG. 2 can have a single pump which delivers fluid to the supply conduit 35 and to the accumulator 44.
  • the force with which the rolls act on workpieces of other than circular outline can be regulated in a very simple and time saving manner as well as within a very wide range. Still further, the magnitude of such force can be observed at all times so that any deviations from desirable magnitude can be eliminated without delay.
  • the machine can comprise two or more pairs of straightening rolls.
  • a combination comprising a housing; at least one pair of exchangeable rotary straightening members defining a passage for workpieces; first mounting means provided in said housing for one of said members and arranged to normally hold said one member against movement away from the other member; and second mounting means provided in said housing for said other member, including a carrier movable with said other member relat ve to said one member to and from a retracted posit1on in which the housing prevents further movement of said other member away from said one member so that sa1d members are ready to treat workpieces of circular cross section, and hydraulic biasing means operable to yleldably urge said carrier away from said retracted positlon so that said members are ready to treat workpieces of other than circular cross section, said biasing means comprising a double acting cylinder mounted in said housing, a piston reciprocable in said cylinder, and a piston rod reciprocable with said piston and operative connected with
  • valves are solenoid-operated valves.
  • biasing means further comprises means for adjusting the pressure of fiuid supplied by at least one of said sources.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Wire Processing (AREA)
US13614A 1969-03-04 1970-02-24 Straightening machine for metallic bars or the like Expired - Lifetime US3626732A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1910879A DE1910879C3 (de) 1969-03-04 1969-03-04 Richtmaschine für langgestreckte Werkstücke runden Querschnitts

Publications (1)

Publication Number Publication Date
US3626732A true US3626732A (en) 1971-12-14

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ID=5727049

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Application Number Title Priority Date Filing Date
US13614A Expired - Lifetime US3626732A (en) 1969-03-04 1970-02-24 Straightening machine for metallic bars or the like

Country Status (13)

Country Link
US (1) US3626732A (ru)
AT (1) AT293825B (ru)
BE (1) BE742416A (ru)
CA (1) CA945883A (ru)
CH (1) CH501440A (ru)
DE (1) DE1910879C3 (ru)
FR (1) FR2034629B1 (ru)
GB (1) GB1291924A (ru)
NL (1) NL162573C (ru)
RO (1) RO56222A (ru)
SE (1) SE371758B (ru)
SU (1) SU415851A3 (ru)
YU (1) YU32963B (ru)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747386A (en) * 1971-03-22 1973-07-24 Kieserling & Albrecht Straightening apparatus for elongated tubular and rod stock
US4471639A (en) * 1982-11-01 1984-09-18 E. W. Bliss Company, Inc. Roll orientation control system for straightening machines
US5014533A (en) * 1987-06-03 1991-05-14 Ergon S.A. Wire processing machine
US6412323B2 (en) * 2000-01-07 2002-07-02 Sms Eumuco Gmbh Cross-roll straightener
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
CN103754603A (zh) * 2014-01-22 2014-04-30 建科机械（天津）股份有限公司 钢筋桁架生产线的防止弦筋扭曲装置
CN106111743A (zh) * 2016-08-05 2016-11-16 中冶赛迪工程技术股份有限公司 一种矫直机升降滑架
CN108880089A (zh) * 2018-06-21 2018-11-23 昆山市全顺铝材锻造有限公司 一种应用于新型铝材校正机的驱动装置
CN113333508A (zh) * 2021-06-02 2021-09-03 湖州远拓输送设备有限公司 一种锥辊整圆机床

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2189136B1 (ru) * 1972-06-21 1975-06-13 Wyko Equipment Ltd
DE2349693A1 (de) * 1973-10-03 1975-04-30 Kieserling & Albrecht Verfahren und vorrichtung zum richten von stranggutabschnitten, insbesondere von stangen und rohren
JPS5744624U (ru) * 1980-08-21 1982-03-11
DE3517196A1 (de) * 1985-05-13 1986-11-13 Th. Kieserling & Albrecht Gmbh & Co, 5650 Solingen Rollenrichtmaschine fuer langgestreckte werkstuecke
CN101791640B (zh) * 2010-03-22 2012-05-30 中信重工机械股份有限公司 一种大型多斜辊矫直机平衡、锁紧缸的分配方法
CN106238516A (zh) * 2016-08-26 2016-12-21 上海奥林汽车安全系统有限公司 一种汽车后盖铰链弯管矫正装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1713138A (en) * 1927-08-06 1929-05-14 Scullin Steel Company Rod-straightening machine
NL82314C (ru) * 1949-08-25
US2987096A (en) * 1959-03-11 1961-06-06 Taylor Wilson Mfg Co Cross roll machines
FR1426765A (fr) * 1965-03-19 1966-01-28 Dalmine Spa Dispositif pour redresser des barres ou des tubes à section circulaire variable dans le sens de la longueur

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747386A (en) * 1971-03-22 1973-07-24 Kieserling & Albrecht Straightening apparatus for elongated tubular and rod stock
US4471639A (en) * 1982-11-01 1984-09-18 E. W. Bliss Company, Inc. Roll orientation control system for straightening machines
US5014533A (en) * 1987-06-03 1991-05-14 Ergon S.A. Wire processing machine
US6412323B2 (en) * 2000-01-07 2002-07-02 Sms Eumuco Gmbh Cross-roll straightener
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
CN103754603A (zh) * 2014-01-22 2014-04-30 建科机械（天津）股份有限公司 钢筋桁架生产线的防止弦筋扭曲装置
CN103754603B (zh) * 2014-01-22 2016-04-13 建科机械（天津）股份有限公司 钢筋桁架生产线的防止弦筋扭曲装置
CN106111743A (zh) * 2016-08-05 2016-11-16 中冶赛迪工程技术股份有限公司 一种矫直机升降滑架
CN108880089A (zh) * 2018-06-21 2018-11-23 昆山市全顺铝材锻造有限公司 一种应用于新型铝材校正机的驱动装置
CN113333508A (zh) * 2021-06-02 2021-09-03 湖州远拓输送设备有限公司 一种锥辊整圆机床
CN113333508B (zh) * 2021-06-02 2023-02-24 湖州远拓输送设备有限公司 一种锥辊整圆机床

Also Published As

Publication number Publication date
NL7003017A (ru) 1970-09-08
FR2034629A1 (ru) 1970-12-11
RO56222A (ru) 1974-03-01
CH501440A (de) 1971-01-15
NL162573B (nl) 1980-01-15
YU34770A (en) 1975-06-30
GB1291924A (en) 1972-10-04
BE742416A (ru) 1970-05-04
YU32963B (en) 1975-12-31
DE1910879A1 (de) 1970-09-17
SE371758B (ru) 1974-12-02
DE1910879B2 (de) 1976-07-15
CA945883A (en) 1974-04-23
DE1910879C3 (de) 1978-12-07
SU415851A3 (ru) 1974-02-15
NL162573C (nl) 1980-06-16
AT293825B (de) 1971-10-25
FR2034629B1 (ru) 1973-12-07

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