US3688546A - Apparatus for presetting the rotational speeds of parts used to create the deformation of a metal in order to obtain wires or strips, such as by wire drawing machine blocks - Google Patents

Apparatus for presetting the rotational speeds of parts used to create the deformation of a metal in order to obtain wires or strips, such as by wire drawing machine blocks Download PDF

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US3688546A
US3688546A US53734A US3688546DA US3688546A US 3688546 A US3688546 A US 3688546A US 53734 A US53734 A US 53734A US 3688546D A US3688546D A US 3688546DA US 3688546 A US3688546 A US 3688546A
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blocks
speed
finishing block
block
dials
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US53734A
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English (en)
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Jean Tranier
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OFFICE TECHNIQUE DES TREFILES
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OFFICE TECHNIQUE DES TREFILES
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • 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
    • B21C1/02—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

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  • ABSTRACT Apparatus for the presetting of the rotational speeds of the various blocks of a multiple wire drawing machine by simple dialling on dials or rules corresponding respectively to each block, at first of the finished wire diameter, then of the wire diameter at each pass.
  • the present invention has as principal subject a simple and mathematically precise method allowing the operator to set, without any previous calculation, the base speeds of each of the blocks forming a multiple wire drawing machine so that each block revolves with correct speed corresponding to non-slip wire drawing process without accumulation nor wire unwinding and this whatever the finisher speed and the dies used in the sequence may be.
  • the process can also be applied to the wire collecting device (separate coiler or spooler) when the wire is not directly collected on the last multiple wire drawing machine block.
  • the process can also be applied to any process of continuous multiple pass deformation such as rod rolling mills or strip rolling mills.
  • rod rolling mills or strip rolling mills we limit our to give the principle and one realization example applicable to a multiple wire drawing machine, the same principle and realizations of same kind can be applied to tandem rolling mills without leaving the spirit of the invention.
  • FIG. 1 is a diagrammatic set of seven dials wherein the finishing diameter is 5.0 mm.
  • FIG. 2 is a similar view in which the finishing diameter is 8.0 mm.
  • FIGS. 3 and 4 are similar diagrammatic views illustrating the positions of the various hairlines after dialing the sequences above.
  • FIG. 5 is a diagrammatic view of a divider.
  • FIG. 6 is a diagrammatic view illustrating the various resistances.
  • FIG. 7 is a diagrammatic view illustrating in more detail one of the resistances.
  • FIG. 8 is a perspective view showing the seven dials corresponding to the seven machine blocks.
  • FIG. 9 is a diagrammatic view illustrating the movement of the finisher lever and the intermediate block levels.
  • FIG. 10 is a perspective view illustrating a practical realization adapted to the electrical system.
  • a complementary operation will consist in dialling on another dial or on a selecting device the drum diameter of the collecting spool or the nominal diameter of the block used for coiling.
  • the present invention can naturally only be applied to multiple wire drawing machines or continuous tandem rolling mills; each of which of the intermediate blocks or intermediate stands being susceptible to be driven at variable speed. This result, in the present state of technical knowledge can be obtained in three ways Each block or stand is driven by a variable speed V electric motor,
  • Each block or stand is driven by a variable speed hydraulic motor
  • Each block or stand is driven, starting from a single motor or a single shaft line by a variable reduction ratio transmission, the speed of the single motor or the single shaft line itself being susceptible to be unchangeable or changeable without leaving the spirit of the invention of our method.
  • the invention not referring to the means of speed variation, it will be supposed, in a way already known in itself or in any other way likely to be invented later, that the motor appliance used for the drive of each of the blocks or stands is suceptible to give to this block or this stand a tangential speed proportional to the value of the signal which will be given to it by the device making use of the process subject of the invention.
  • equations b represented by anyone among them, e.g., 2 log D, log V 2 log D log V the possible variation of log V, with regard to log V, is limited to a range of values compatible with the possible variation of log D, with regard to log D itself limited in practice by metallurgical considerations, it is not necessary to look for a proportionality on a very large scale of values.
  • the appliance built according to the invention will comprise a certain number of dials, as many as the wire drawing machine comprises blocks; all the dials equal in diameter, being graduated according to a logarithmic scale of appropriate modulus, equal for all dials, each dial being alloted to one block.
  • All the dials are linked in rotation, one to each other, by any means, such as e.g., gear of ratio 1 l with interposition of an intermediate in order to keep the same rotating direction for all the dials or by a set of chains of ratio 1 l, or yet by a common shaft carrying a certain number of worms gearing each one with a hollow tooth wheel integral with a dial.
  • any means such as e.g., gear of ratio 1 l with interposition of an intermediate in order to keep the same rotating direction for all the dials or by a set of chains of ratio 1 l, or yet by a common shaft carrying a certain number of worms gearing each one with a hollow tooth wheel integral with a dial.
  • the dials are angularly offset with regard to that of the finisher in order to reproduce the various reduction ratios of the kinematic chain of the wire drawing machine so that, for a same speed of all the motors or a same position of the individual speed variation devices, the angle shown by the dial of each intermediate block with regard to that of the finisher is equal to half of the difference of log V log V in accordance with the chosen graduation modulus.
  • FIGS. 1 and 2 reproduce the whole set of dials of a seven block wire drawing machine, the kinematic chain of which has been arbitrarily chosen so that the tangential speeds of the various blocks for a same speed of the various motors or a same position of the various speed variation devices answer the following equations.
  • Equations D If these equations are compared to the corresponding equations C, it is deduced after resolution:
  • log D log D, log D,- 0.25 log D log D,- 0.20 log 0;, log 13,- 0.15 log D log D,P 0.10 log D, log D, 0.05 log D, log D; 0.025
  • Equations F Vvvvvv dial 1 360 X 0.25 dial 2 360 X 72 dial 3 360 X 0.15 54 dial 4 360 X 0.10 36 dial 5 360" 9 0.05 18 dial 6 360 X 0.025 0 and the whole set of the seven dials takes for example the aspect of FIG. 1 when a finishing diameter of 5.0
  • the dial corresponding to the finisher is the only one accessible to a revolution operated by the operator for the purpose of dialling on this dial, in front of a fixed hairline, the finishing die diameter.
  • any amount of revolution applied to this dial brings about a revolution equal and in the same direction as all the dials corresponding to the intermediate blocks and the whole set is locked after dialling of the finisher diameter which entails that the offsettings referred to in the previous paragraph are always maintained.
  • FIGS. 3 and 4 show respectively the positions of the various hairlines after dialling both the sequences above.
  • FIG. 6 Remaining within the above example of a seven block wire drawing machine, the diagram is given in FIG. 6 in which 1 is a DC. generator, preferably at stabilized voltage,
  • the potentiometric taking point E on the fixed resistance DF is situated in such a point that branch DE represents 45 percent of the total resistance DF.
  • FIG. '7 reproduces with more detail the practical realization of anyone of the resistances GI.
  • FIG. 8 The practical realization is shown on FIG. 8 in which the references 13 represent the seven dials corresponding to the seven machine blocks.
  • Each of these diais is fixed on a gear 14 with the above stated angular offsetting and each gear engages a worm 15, all the worms being carried on the same shaft 16 which can be operated by knurled button 17 and locked into position by any system 18.
  • the six potentiometers 11 are disposed on a line parallel to that of the seven dials.
  • the ratio of the tooth numbers of the gears 19 and 21 is chosen in accordance with the logarithmic graduation modulus of the dials in such a way that for the total length of stroke of one of the potentiometers 1 l the angular movement of this hairline corresponds to the desired degree of individual speed variation.
  • the intermediate blocks are so equipped with a potentiometer and a movable hairline, the rotation of which is linked to that of the potentiometer.
  • the finisher has a fixed potentiometric resistance and a movable dial in front of a fixed hairline whereas the intermediate blocks have a variable potentiometer and a movable hairline in front of a fixed dial.
  • each hydraulic motor is separately fed by a variable delivery pump, said pump being driven at a fixed speed by an asynchronous motor or by a shaft line.
  • the delivery variation of the pump obtained by the rectilinear movement in case of a radial piston pump or by angular movement in case of an axial piston pump, will always be driven by a hydraulic servo-motor in such a way that the rotational speed of said motor is always proportional to the movement of the part piloting the servo-motor.
  • the signal given to the pump servo-motor is proportional to a general speed signal and to the ratio of the lever arms corresponding to the correction of the desired relative speed with regard to the finisher speed.
  • FIG. 9 explains this diagram in which a rectilinear lever 22 sliding in two bearings 23 is linked to seven elementary parallel levers of which 24 is the finisher lever and 25 are the different intermediate block levers. The other end of the levers 24 and 25 is connected with a fixed point 26.
  • Some device as e.g., a sliding movement in a slide 27 integral with a casing 28 allows the angular movement of the levers 24 and 25.
  • each of the levers 25 On each of the levers 25 and in a point 0, the median position of which is such as N0 45 percent of NP are taken the servo-motor drives of each of the intermediate blocks.
  • each of the levers 25 comprises a slide 29, and the spigot 30 materializing point 0 hangs on a swivelling arm, whose swivelling point R can be moved; as desired, by a limited value.
  • the system includes the seven dials 13 with their gears 14, worms 15, shaft 16, operating button 17 and locking system 18.
  • the dialling hairline appropriate to the intermediate blocks is carried by a gear 32 coaxial with dial 13. This gear engages a worm 33 keyed to a shaft 34 carrying a knurled operating button 35 and some locking device 36. On the other end of shaft 34 is situated another screw engaging a nut 37 linked to a point R oflever 31. The rotation of nut 37 is prevented by any suitable system so that the rotation of shaft 34 creates a linear movement of point R and consequently of point 0 of lever 31.
  • the reduction ratio of the worm-wheel-set 32/33, the pitch of nut 37 and the total length of lever 31 are, of course, calculated in accordance with the logarithmic dial modulus and the features of the pump servo-meter in such a way that the movement of the hairline in front of the dials 13 be in relation to the required speed variation.
  • the subject of this invention is to preset the relative speeds of the intermediate blocks with an approximation of industrial exactitude. If it is desired to proceed to non-slip straight-through wire drawing process, this approximation is, however, not sufficient in itself.
  • Application has to be made of a dancer roll placed between the wire exit of an intermediate block and the entry of the wire into the following die according to an already known technique.
  • the signal issued by this dancer roll by any means already knows, such as rheostat, induction regulators, etc. as regards the electric circuits or by simple linear movement of a swivelling arm as regards control by levers can, without any difficulty, be added algebraically to the signal issued from the predialling in order to give it the small necessary correction.
  • this signal in form of a small difference of positive or negative potential will be sent to the amplifier of the intermediate block concerned.
  • the invention process can finally be extended to the speed control of a wire take-up device.
  • the take-up device in question which can be, either a coiler collecting wire in coils or a spooler collecting wire on spools, comprises one only coiling diameter or one only reel size
  • the speed presetting system which is applied to it is strictly identical to that which regulates the finisher speed, i.e., the taking point (E in the electrical case or L in the mechanical case) is fixed on the divider. It is only in case the take-up device can take 2 or several diameters that the invention process shows its value.
  • the divider comprises as many fixed taking points as there are block diameters so that by simple circuit commutation the motor speed of the take-up device adjusts itself according to the diameter of this take-up device and the general speed reference in order to give the desired tangential speed to the take-up device.
  • An apparatus for equipping a multiple wire drawing machine comprising a plurality of intermediary blocks, a die for each block, a motor for driving each block, a finishing block receiving the wire once drawn, means regulating without preliminary calculation the speed of rotation of each of said intermediary blocks as a function of the speed of said finishing block to obtain a wire drawing without slipping, accumulation and curving, said means comprising a plurality of dials corresponding in number to said blocks graduated according to the logarithmic scale, means for placing said various dials jointly in rotation, the dials of said intermediary blocks being angularly set each one to a different quantity with relation to the dial of said finishing block, means controlling the rotation of said dial of said finishing block and means for posting opposite each of the logarithmic graduations of said dials of said intermediary blocks a deflection acting upon the motor of each of said intermediary blocks to vary the speed of rotation of said intermediate blocks relative to the speed of rotation of said finishing block.
  • said blocks are each driven by a direct current motor having means for rendering the speed of each motor proportional to the electric voltage of a signal comprising a variable potentiometric resistance for the regulation of the overall speed of said wire drawing machine, a fixed potentiometric resistance for said finishing block, a plurality of equal variable potentiometric resistances corresponding in number to said intermediary blocks equal to said potentiometric resistance of said finishing block and means for varying said variable potentiometric resistances as a function of the angular displacements of said deflections with relation to the logarithmic graduations of the various dials of said intermediary blocks.
  • An apparatus comprising defining a divider element for said finishing block comprising a fixed potentiometric resistance for said finishing block, divider elements for each of said intermediary blocks consisting of equal variable potentiometric resistances equal to said divider element of said finishing block, means for determining a point of potentiometric deduction upon said divider element of said finishing block located at a point so that the branch of said divider element feeding said finishing block r presents 45 percent of the total resistance and means or determining the reduction points for said divider elements of said intermediary blocks whereby said points of reduction are located so that the branches of the resistances constituting said divider elements represent 45 percent of the total value of each of said resistances.
  • finishing block comprises a plurality of diameters
  • said divider element of said finishing block having a number of deduction points equal to the number of diameters of said block whereby the commutation is carried out according to the diameter of the finishing block used, the various points of deduction being harmoniously deducted around a point located at 45 percent of the total value of the divider element.
  • An apparatus comprising dials in a number corresponding to the passes of the machine each fixed upon a gear with an angular deduction corresponding to the cinematic chain adopted, a plurality of endless screws, each one meshing with one of said gears, a shaft for said endless screws, means for rotating said shaft and locking said shaft in a predetermined position, said regulating potentiometers of the voltage of said intermediary blocks being located parallel to said dials, a shaft for each potentiometer, a driving gear on said shaft, a wheel coaxial to the corresponding dial having a reference line which is displaced according to the graduation of the corresponding dial.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Ropes Or Cables (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Metal Rolling (AREA)
US53734A 1969-08-05 1970-07-10 Apparatus for presetting the rotational speeds of parts used to create the deformation of a metal in order to obtain wires or strips, such as by wire drawing machine blocks Expired - Lifetime US3688546A (en)

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FR6926791A FR2055886A5 (enExample) 1969-08-05 1969-08-05

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US (1) US3688546A (enExample)
DE (1) DE2038745C3 (enExample)
FR (1) FR2055886A5 (enExample)
GB (1) GB1291623A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079609A (en) * 1976-12-14 1978-03-21 Amtel, Inc. Control system for multiple stage reducing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2749505C2 (de) * 1977-11-04 1987-01-15 Siemens AG, 1000 Berlin und 8000 München Sollwertkaskade
IT1160942B (it) * 1978-11-21 1987-03-11 Indesit Dispositivo per regolare la velocita' di rotazione di un motore in una macchina lavabiancheria

Citations (9)

* 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.
US1341651A (en) * 1920-06-01 Sylvania
US1653097A (en) * 1923-11-09 1927-12-20 Harold W Hodgson Multiple continuous-wire-drawing machine
US2232993A (en) * 1938-07-29 1941-02-25 Nat Standard Company Inc Wire drawing machine
US2266861A (en) * 1939-08-31 1941-12-23 Western Electric Co Wire drawing apparatus
US2715959A (en) * 1951-02-17 1955-08-23 John A Roebling S Sons Corp Multiblock wire-drawing apparatus and method
GB748448A (en) * 1952-12-23 1956-05-02 Birger David Sigvard Lofberg Device for driving wire drawing machines and rolling mills
US3314264A (en) * 1964-03-23 1967-04-18 Kocks Gmbh Friedrich Apparatus for controlling the speed of the drive motors for driving the roll stands of a multiple-stand rolling mill
US3518859A (en) * 1967-06-14 1970-07-07 Asea Ab Control equipment for continuous production lines

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1341651A (en) * 1920-06-01 Sylvania
US1281439A (en) * 1913-05-05 1918-10-15 Bridgeport Brass Co Multiple-wire-drawing machine.
US1653097A (en) * 1923-11-09 1927-12-20 Harold W Hodgson Multiple continuous-wire-drawing machine
US2232993A (en) * 1938-07-29 1941-02-25 Nat Standard Company Inc Wire drawing machine
US2266861A (en) * 1939-08-31 1941-12-23 Western Electric Co Wire drawing apparatus
US2715959A (en) * 1951-02-17 1955-08-23 John A Roebling S Sons Corp Multiblock wire-drawing apparatus and method
GB748448A (en) * 1952-12-23 1956-05-02 Birger David Sigvard Lofberg Device for driving wire drawing machines and rolling mills
US3314264A (en) * 1964-03-23 1967-04-18 Kocks Gmbh Friedrich Apparatus for controlling the speed of the drive motors for driving the roll stands of a multiple-stand rolling mill
US3518859A (en) * 1967-06-14 1970-07-07 Asea Ab Control equipment for continuous production lines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079609A (en) * 1976-12-14 1978-03-21 Amtel, Inc. Control system for multiple stage reducing apparatus

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DE2038745A1 (de) 1971-03-11
FR2055886A5 (enExample) 1971-05-14
DE2038745C3 (de) 1981-01-22
DE2038745B2 (de) 1980-05-22
GB1291623A (en) 1972-10-04

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