US3828596A - Automatic control system for draw-forming with vibratory energy - Google Patents

Automatic control system for draw-forming with vibratory energy Download PDF

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Publication number
US3828596A
US3828596A US00324416A US32441673A US3828596A US 3828596 A US3828596 A US 3828596A US 00324416 A US00324416 A US 00324416A US 32441673 A US32441673 A US 32441673A US 3828596 A US3828596 A US 3828596A
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Prior art keywords
signal
tube
amplitude
function
speed
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Expired - Lifetime
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US00324416A
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English (en)
Inventor
G Usui
I Komine
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JFE Engineering Corp
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Nippon Kokan Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes specially adapted for making tubular articles
    • B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes specially adapted for making tubular articles by means of mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
    • B21C1/006—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing using vibratory energy

Definitions

  • the vibrating energy is impressed by a load switch which acts with tensile force to the plug mandrel or with compressive force to the die.
  • a vibrating sys tem for tube-drawing is driven with a predetermined vibrating wave amplitude.
  • the phenomena of seizure is produced by locally elevated temperature on the tube with the increase of friction heat, because the drawing speed is near zero in the starting stage of tube-drawing while the vibrating energy is full.
  • the drawing speed is re quired to be reduced, the operator of the drawing machine is obliged to change the value of the vibrating amplitude. It is well-known that this operation is not always smooth and results in increasing friction heat. The increased friction heat brings about a break of oil film and causes the seizure.
  • a feature of this invention is that the best suited amplitude of vibrating velocity to the drawing speed is automatically established.
  • a set-up value is established which should be selected in the range of from 1.6 to 11.0.
  • the inventors have discovered that the foregoing difficulties are resolved when the ratio of amplitude of vibrating velocity, i.e. angular velocity X amplitude (n), to drawing speed is from 1.6 to 11.0.
  • An object of thisivention is to provide a system using vibratory energy capable, which automatically adjusts the vibratory amplitude and drawing speed so that the ratio of amplitude of vibrating velocity to drawing speed is within the mostsuitable range.
  • Another object of this invention is to provide a system using vibratory energy which avoids a break of oil film or a seizure based on the elevating of temperature with increase of friction heat.
  • FIG. 1 depicts an illustrative embodiment of this invention
  • FIG. 2 depicts a block diagram of the control system of the embodiment of FIG. 1;
  • FIG. 3 is an explanatory graph on starting behavior of amplitude of vibrating velocity by this invention.
  • FIG. I there is shown an arrangement of each unit of a tube-drawing machine into which this inventive control system is included.
  • a mother tube (1) is drawn through a die (2) and a plug (3) by means of a carriage unit (4), thereby to simultaneously reduce both outside diameter and thickness of the tube (1).
  • Carriage unit (4) acts by a drive motor (12) which is operated through a board (11).
  • a rotating generator, e.g. tachometer (13) is arranged to motor (12) and utilized to measure and control the drawing speed.
  • a transfer mechanism may be further added to the above machine.
  • such transfer mechanism comprises a mandrel (5), a high-frequency power generator (6) an electro-accoustic transducer (7) and a horn for enlarging amplitude, e.g. a coupler (8), of vibratory energy.
  • high-frequency power from the generator (6) is converted into ultra-sonic vibration and enlarged to suitable amplitude by horn (8).
  • the enlarged vibratory energy is transferred into mandrel (5) with a form of resonance vibration and vibrates plug (3) connected to the end of. mandrel (5).
  • a control (10), used to control vibrating velocity is further added to the above ultra-sonic vibrating mechanism.
  • the output of tachometer (13) and pickup means (9), which are placed at a suitable location in the above vibrating system and comprise electrostrictive elements, are applied to unit (10).
  • High-frequency generator (6) is controlled by the output of unit (10).
  • the mechanism or components of unit (10) is shown as a block diagram in FIG. 2, and comprises a function generator (14), an amplitude limiter (15), and band-pass filter (16).
  • the electrical output of pickup means (9), i.e. the present amplitude of vibrating velocity, is applied to amplitude limiter (15), and the output of tachometer (13), i.e. drawing speed, to function generator (14).
  • the outputof the tachometer (13), i.e., Ev, corresponding to said drawing speed is converted into f(Ev) by function generator (14).
  • the converting rate, i.e., f(Ev): Ev is selected from the range of 1.6 to 11.0.
  • said f(Ev) is an output of said function generator (14) in which the suitable range of amplitude of vibrating velocity to various tube drawing speed is preincluded.
  • Such rate is chosen and used to draw a mother tube without any troubles, e.g. a break of oil film, a seizure or the like.
  • the output f(Ev) is supplied to amplitude limiter (15).
  • the output of the pickup means (9) for the present amplitude of vibrating velocity, i.e. EL is supplied to limiter (15) as mentioned above.
  • the amplitude E is readjusted to be equal to f(Ev) through shaping circuit, a comparative circuit and rectifying circuit, which are included into limiter (15) but not 3 4 shown.
  • Eg corresponds to a change of res-
  • h Converting of signal Ev which is an output load or the elevating of temperature of said vibrating r o ng generator of tachometer can be system. Accordingly, the o tp t EC fr li it (15) readily controlled.
  • the E0 is filtered to be within a conother examples of i n n we q Stant range and made to be Stable; Consequently, ofthese types ofcontrol can be utilized in this inventive normal oscillation is avoided.
  • the filtered output System is amplified by high-frequency power generator (6), Actual examples based on this inventive system are and impressed to said transducer (7) as the normal and given hereinbelow for illustrative, and not limiting, purstable output E0.
  • Signal E0 is sufficient to assure that poses.
  • the ratio of amplitude of vibrating velocity to drawing speed is within the range of 1.6 to 11.0, i.e. the conrequirements: verted rate by said function generator (14) as men- A r d b B mp rm (2: a out 0. tioned above. Because the suitable range of amplitude Ratio of amplitude of vibrating velocity to drawing of vibrating velocity corresponding to the changeable Speed (C): 12.0 range of said drawing speed is preincluded in the function generator (14). I Remarkable seizure was generated on both outside In the above-mentioned control system, an important and inside diameter of said tube.
  • C was factor is the positive feedback circuit comprising translowered to the range of from 1.6 to 2.0, no seizure apducer (7), pick-up means (9), amplitude limiter (l5), peared.
  • the drawing speed was possible to be increased band-pass filter (l6), and high-frequency power generto the range of 30 to m/min.
  • the ratio of amplitude of vibrating velocity to drawing speed should be readjusted within the range of 1.6 to l 1.0. According to the above-mentioned system, such ratio can be realized automatically and stably without any difficulties.
  • an automatic controlling method of tube drawing characterized in that the actual tube drawing speed is caught as an electrical signal, said signal is converted into another signal corresponding to a ratio of amplitude of vibrating velocity to said tube drawing speed is turned into a predetermined range of from 1.6 to l 1.0 by function generating means, the signal thereby is adjusted in connection with detected actual amplitude of vibrating velocity and then power-amplified, and successively an obtained high frequency power signal is impressed to an electro-acoustic transducer giving said vibrating energy to siad tube therewith.
  • a tube-drawing system comprising a die, means for drawing said tube through said die at a predetermined speed, and means for applying vibratory energy 6 to said tube during thedrawing, the combination comprising:
  • said first means comprises a rotating generator for measuring the speed of drawing of said tube and responsive thereto applying a first signal to said third means;
  • said second means comprises a pickup means attached to said means for applying vibratory energy for measuring the amplitude of vibratory velocity and responsive thereto applying a second signal to said third means;
  • said third means comprises a function generator for converting said first signal to a function signal representing said ratio of from 1.6 to 11.0, amplitude limiter for comparing said second signal to said function signal and adjusting said second signal to be equal to said function signal and producing a third signal, and a band-pass filter for filtering said third signal before transmittal to control said means for applying vibratory energy.
  • said means for applying vibratory energy comprises a high frequency power generator, electro-acoustic transducer for transforming said high frequency power to acoustic vibrations; wherein said second means comprises a pickup means for measuring said acoustic vibrations and converting same to electrical signals; and wherein said third means comprises a function generator for converting said first signal to a function signal representing said ratio, equalizer circuit for adjusting said second signal to be equal to said function signal, and filter means for filtering the signal from said equalizer circuit, and wherein said equalizer, said filter means, said high-power generator, said electroacoustic transducer and said pickup means form a positive feedback path.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
US00324416A 1971-12-29 1973-01-17 Automatic control system for draw-forming with vibratory energy Expired - Lifetime US3828596A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP132472A JPS5422422B2 (enrdf_load_stackoverflow) 1971-12-29 1971-12-29

Publications (1)

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US3828596A true US3828596A (en) 1974-08-13

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US00324416A Expired - Lifetime US3828596A (en) 1971-12-29 1973-01-17 Automatic control system for draw-forming with vibratory energy

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US (1) US3828596A (enrdf_load_stackoverflow)
JP (1) JPS5422422B2 (enrdf_load_stackoverflow)
DE (1) DE2264018A1 (enrdf_load_stackoverflow)
FR (1) FR2169906B1 (enrdf_load_stackoverflow)
GB (1) GB1418650A (enrdf_load_stackoverflow)
IT (1) IT973249B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0131429A3 (en) * 1983-07-08 1985-07-10 National Research Development Corporation Draw-bending apparatus and method
EP1177843A3 (en) * 2000-08-03 2003-06-11 Pittsburg Tube Co. Tube formation method and apparatus
WO2014023768A1 (de) * 2012-08-07 2014-02-13 Devad Gmbh Verfahren zum umformen eines werkstücks
CN105209189A (zh) * 2013-11-20 2015-12-30 丹尼尔和科菲森梅克尼齐有限公司 用于拉制管子的拉制机器及其使用方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9211944D0 (en) * 1992-06-05 1992-07-15 Bicc Plc Mineral insulated electric cable manufacture

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638207A (en) * 1947-11-17 1953-05-12 Engineering Res Associates Inc Method and apparatus for forming wire and the like
US3209572A (en) * 1963-06-21 1965-10-05 Aeroprojects Inc Vibratory energy method and apparatus
US3209574A (en) * 1963-11-04 1965-10-05 Aeroprojects Inc Apparatus and method applying vibratory energy
US3212313A (en) * 1963-06-21 1965-10-19 Aeroprojects Inc Tube drawing apparatus employing vibratory energy
US3295349A (en) * 1965-10-04 1967-01-03 Aeroprojects Inc Method and apparatus applying vibratory energy
US3342050A (en) * 1965-05-26 1967-09-19 Bell Telephone Labor Inc Ultrasonic wire drawing
US3657910A (en) * 1969-09-16 1972-04-25 Nippon Kokan Kk Method and apparatus for cold drawing metal tubes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1399018A (fr) * 1963-06-21 1965-05-14 Aeroprojects Inc Procédé et dispositif utilisant l'énergie vibratoire pour étirer notamment des fils

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638207A (en) * 1947-11-17 1953-05-12 Engineering Res Associates Inc Method and apparatus for forming wire and the like
US3209572A (en) * 1963-06-21 1965-10-05 Aeroprojects Inc Vibratory energy method and apparatus
US3212313A (en) * 1963-06-21 1965-10-19 Aeroprojects Inc Tube drawing apparatus employing vibratory energy
US3209574A (en) * 1963-11-04 1965-10-05 Aeroprojects Inc Apparatus and method applying vibratory energy
US3342050A (en) * 1965-05-26 1967-09-19 Bell Telephone Labor Inc Ultrasonic wire drawing
US3295349A (en) * 1965-10-04 1967-01-03 Aeroprojects Inc Method and apparatus applying vibratory energy
US3657910A (en) * 1969-09-16 1972-04-25 Nippon Kokan Kk Method and apparatus for cold drawing metal tubes

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0131429A3 (en) * 1983-07-08 1985-07-10 National Research Development Corporation Draw-bending apparatus and method
US4689981A (en) * 1983-07-08 1987-09-01 National Research Development Corporation Draw-bending method
EP1177843A3 (en) * 2000-08-03 2003-06-11 Pittsburg Tube Co. Tube formation method and apparatus
WO2014023768A1 (de) * 2012-08-07 2014-02-13 Devad Gmbh Verfahren zum umformen eines werkstücks
CN104520026A (zh) * 2012-08-07 2015-04-15 戴维德有限公司 用于成形工件的方法
CN105209189A (zh) * 2013-11-20 2015-12-30 丹尼尔和科菲森梅克尼齐有限公司 用于拉制管子的拉制机器及其使用方法
CN105209189B (zh) * 2013-11-20 2017-04-05 丹尼尔和科菲森梅克尼齐有限公司 用于拉制管子的拉制机器及其使用方法

Also Published As

Publication number Publication date
FR2169906B1 (enrdf_load_stackoverflow) 1978-03-03
DE2264018A1 (de) 1973-07-12
IT973249B (it) 1974-06-10
JPS5422422B2 (enrdf_load_stackoverflow) 1979-08-07
FR2169906A1 (enrdf_load_stackoverflow) 1973-09-14
GB1418650A (en) 1975-12-24
JPS4871763A (enrdf_load_stackoverflow) 1973-09-28

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