US3822575A - Non-slip non-accumulating continuous wire drawing machine - Google Patents

Non-slip non-accumulating continuous wire drawing machine Download PDF

Info

Publication number
US3822575A
US3822575A US00271724A US27172472A US3822575A US 3822575 A US3822575 A US 3822575A US 00271724 A US00271724 A US 00271724A US 27172472 A US27172472 A US 27172472A US 3822575 A US3822575 A US 3822575A
Authority
US
United States
Prior art keywords
motor
motors
metal
output
electrical
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
US00271724A
Other languages
English (en)
Inventor
L Hoorelbeke
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.)
Bekaert NV SA
Original Assignee
Bekaert NV SA
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 Bekaert NV SA filed Critical Bekaert NV SA
Application granted granted Critical
Publication of US3822575A publication Critical patent/US3822575A/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
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • B21C1/12—Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms

Definitions

  • a wire drawing machine has a plurality of drawing dies each associated with a drawing block powered by a direct current electric motor, all the motors being connected in parallel and having current supply controlling circuitry which insures that the sum of all of the motor speeds are constant and that all torques are equal except for a proportionality factor 4 Claims, 1 Drawing Figure ws Win S5 [Sn
  • This invention relates to a non-slip non-accumulating continuous wire drawing machine with adjustable back-pull containing a number of drawing dies and drawing blocks, whereby each drawing block is driven by a direct current motor with external excitation and whereby the interconnection of the motors and the design of the control mechanism are such that the sum of the speeds of all motors remains constant and that, except for a proportionality factor, the torques connected to the motors remain equal to each other.
  • Nonaccumulating means that the wire is not pulled over transfer pulleys between the successive blocks in order to carry out speed
  • the regulating mechanism of a wire drawing machine according to the invention is designed in such a way that when making a correction in order to meet equation l or EU, constant, equation (2') is automatically met, or, in other words, in order to meet EU, constant (-1 a correction is made by changing the currents I, I 1,, in the motors m, I m,, in such a way that equations (2) are always met.
  • This is obtained by taking the output value of amplifier P as a reference value for the determination of currents], 1,, in the motors m, m,,, or, in other words, this signifies that the control circuits of the rectifiers G, G,, are connected in parallel'on the output of amplifier P.
  • a switch S S is provided between the output of amplifier P and the input of each control circuit of the rectifiers of the motors, and the control mechanism of each motor m, m,, isprovided with a handle H, H, having four positions, I (up), II (down), Ill (left), and IV (right), whereby these switches S, S,, and this handles H, H,, are mutually connected by means of known relay connections in such a manner that for any motor m,, only motor m, is energized in position I, all motors m, m,, in position II, all motors p to m,, in position IV, and that, when released, each handle H, automatically takes the zero position.
  • wire threading after welding can be done by connecting only the motors that serve for carrying out this operation, since the control circuit of each motor can be easily interruptcd. This happens by moving the handles H, H,, or in other words by controlling the switches S, S,,.
  • the torques C, C,, acting on these motors are no longer altered by a change of the cur rent in the field windings. This considerably simplifies the service of the machine.
  • the threephase alternating current system (380 volts) can be used without using transformers for the classic direct current motors (440 volts).
  • the parallel feed of the motors also pennits maintaining the current in each motor at a low level, which is of importance for a long motor life.
  • a classic motor (440 volts) will maximally run percent above its normal working "speed, since the applied voltage can maximally be 510 volts in a three-phase alternating current system of 380 volts.
  • the machine according to the invention may run in with somewhat loose wires on various blocks. This saves time and difiiculties when starting.
  • FIGURE is a circuit diagram of the machine as set forth in the invention.
  • the machine illustrated in the drawing is a non-slip non-accumulating continuous wire drawing machine with adjustable back-pull containing n drawing dies T,
  • Each block W, W,- W, is driven by a separate direct current motor m, m, m,, with external excitation. These motors m, m,, are connected in parallel. The nominal voltage of these motors is for example 440 volts.
  • Each motor m, m, is provided with a self-controlled rectifier G, G,, for converting the feed from the three-phase alternating current system, for example an alternating voltage of 380 volts.
  • the rectifiers G, G, are controlled by means of a thyristor circuit.
  • the fluxes I 1 CI in the field windings P, P, P, are determined by using the resistors R, R, R,, of these windings and the armature currents I, I, 1,, in the motors by current amplification of the adjustment.
  • Each motor m, m, is provided with a direct tension direct tension transformer O, 0,, for the galvanic separation of the terminal voltages U, U,,-of the motors, whereby the output clamps of these rectifiers O, 0,, are series-connected, so that except for a proportionality factor, the sum or 2U, tained.
  • the regulating mechanism of the machine is provided with an adjustable direct tension source U for the determination of a reference tension U which corresponds to a certain sum of the speeds n, n, ...+n,,or2U,
  • control mechanism is provided with an error amplifier P, whereby the input value of the amplifier is determined by the difference U EU, and the output value of this amplifier is transferred to the control circuit of the rectifiers G, G,,.
  • the output value of the amplifier P is used as reference value 1,, for the, determination of currents I, I, 1,, in the motors.
  • Switches S, S,- S, are provided between the output of amplifier P and the input of each control circuit of the motors.
  • each motor m, m, m, is provided with a handle H, H,- H, having four positions, I(up), II(down), III(left), IV(right).
  • the switches S, S,, and these handles I-I, H are connected by means of known relay connections in such a way that for any motor m,- only motor m, is energized in position I, all motors m, m,, in position II, all motors m, up to m,- in position III, and all motors m,,, up
  • each handle H,- automatically takes the zero position, or, in other words, the associated switch S,- is automatically opened.
  • power supply means for supplying electrical energy to each of the electrical motors and to which they are connected in parallel
  • the power supplymeans having a variable electrical output which is dependent upon a control voltage supplied thereto
  • a plural stage processing assembly for a length of metal comprising;
  • summing means to which the outputs of all of the motor speed measuring means are interconnected for producing a total motor speed signal representing the sum of all of the output motor signals
  • the power supply means is an amplifier through which alternating current is supplied
  • each of the electrical motors is a direct current motor
  • each of the motors has a self-controlled rectifier means connected between the source and the motor.
  • each metal deforming station is a wire drawing die
  • each of the takeup and drawing means is a drawing block. 4.
  • a. automatic switch means is provided in each of the motor circuits for either energizing or deenergizing the motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Multiple Motors (AREA)
  • Metal Extraction Processes (AREA)
US00271724A 1971-07-16 1972-07-14 Non-slip non-accumulating continuous wire drawing machine Expired - Lifetime US3822575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE770100A BE770100A (fr) 1971-07-16 1971-07-16 Meerpas draadtrekmachine.

Publications (1)

Publication Number Publication Date
US3822575A true US3822575A (en) 1974-07-09

Family

ID=3858420

Family Applications (1)

Application Number Title Priority Date Filing Date
US00271724A Expired - Lifetime US3822575A (en) 1971-07-16 1972-07-14 Non-slip non-accumulating continuous wire drawing machine

Country Status (7)

Country Link
US (1) US3822575A (it)
BE (1) BE770100A (it)
ES (1) ES404871A1 (it)
FR (1) FR2146285B1 (it)
GB (1) GB1400176A (it)
IT (1) IT965912B (it)
NL (1) NL7209669A (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4812721A (en) * 1987-09-25 1989-03-14 Essex Group, Inc. Wire drawing control apparatus
CN103521537A (zh) * 2013-10-29 2014-01-22 伊东新(德阳)线缆设备有限公司 新型单传动铝合金拉线机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105215066B (zh) * 2015-09-30 2017-12-26 深圳市英威腾电气股份有限公司 拉丝机系统及其变频控制方法、拉丝长度计算方法和装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1281439A (en) * 1913-05-05 1918-10-15 Bridgeport Brass Co Multiple-wire-drawing machine.
US1914833A (en) * 1930-11-17 1933-06-20 Nacken Walther Multiple wire drawing machine
US2124518A (en) * 1936-01-02 1938-07-19 American Steel & Wire Co Mill department control
US2321612A (en) * 1940-08-28 1943-06-15 Vaughn Machinery Co Wire drawing apparatus
US2708024A (en) * 1943-07-20 1955-05-10 Marshall Richards Machine Comp Wire drawing apparatus
US2759139A (en) * 1948-08-12 1956-08-14 Clark Controller Co Control circuits
US3518859A (en) * 1967-06-14 1970-07-07 Asea Ab Control equipment for continuous production lines
US3586221A (en) * 1969-08-28 1971-06-22 Air Reduction Torque control of multiple motors for uniform feed of welding wire

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1281439A (en) * 1913-05-05 1918-10-15 Bridgeport Brass Co Multiple-wire-drawing machine.
US1914833A (en) * 1930-11-17 1933-06-20 Nacken Walther Multiple wire drawing machine
US2124518A (en) * 1936-01-02 1938-07-19 American Steel & Wire Co Mill department control
US2321612A (en) * 1940-08-28 1943-06-15 Vaughn Machinery Co Wire drawing apparatus
US2708024A (en) * 1943-07-20 1955-05-10 Marshall Richards Machine Comp Wire drawing apparatus
US2759139A (en) * 1948-08-12 1956-08-14 Clark Controller Co Control circuits
US3518859A (en) * 1967-06-14 1970-07-07 Asea Ab Control equipment for continuous production lines
US3586221A (en) * 1969-08-28 1971-06-22 Air Reduction Torque control of multiple motors for uniform feed of welding wire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4812721A (en) * 1987-09-25 1989-03-14 Essex Group, Inc. Wire drawing control apparatus
CN103521537A (zh) * 2013-10-29 2014-01-22 伊东新(德阳)线缆设备有限公司 新型单传动铝合金拉线机

Also Published As

Publication number Publication date
GB1400176A (en) 1975-07-16
NL7209669A (it) 1973-01-18
FR2146285A1 (it) 1973-03-02
ES404871A1 (es) 1975-06-16
BE770100A (fr) 1971-12-01
IT965912B (it) 1974-02-11
FR2146285B1 (it) 1974-12-27

Similar Documents

Publication Publication Date Title
JPS56150994A (en) Controller for power for induction motor
US3822575A (en) Non-slip non-accumulating continuous wire drawing machine
US2342790A (en) Control system
US3543121A (en) Jerk limit circuit for traction motor control systems
US2086594A (en) Motor control apparatus
US3601670A (en) Plural motor driving system adapted for regenerative braking
US2223728A (en) Control system for reversible rolling mills
US2205204A (en) Variable voltage motor control
US2766415A (en) Magnetic amplifier motor control system
US3109330A (en) Continuous mill control means
US1764312A (en) Control system for rolling mills
US3341759A (en) Control device for electric cars including scr short circuiting of a starting resistance
US2124518A (en) Mill department control
US2432801A (en) Means for uniformly electric resistance heating continuously moving metal strip
US2386580A (en) Alternating current hoist control
US2982897A (en) Dual-motor a.c. drive for automatic hoists
US2436027A (en) Apparatus for controlling the electric heating of continuous metallic articles
JPS56150973A (en) Method of controlling inverter of pulse width modulating system
US1932073A (en) Speed control for elevators
US2469899A (en) Motor control system
US2349618A (en) Self-regulated motor-generator set
US1934505A (en) Control system for roll-table motors
US2153429A (en) Adjustment of speed-load characteristics of mill motors
US2176039A (en) Run-out table drive
US2287603A (en) Frequency changer set