EP0313769B1 - Verfahren und Vorrichtung zum intermittierenden Richten von Draht - Google Patents

Verfahren und Vorrichtung zum intermittierenden Richten von Draht Download PDF

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Publication number
EP0313769B1
EP0313769B1 EP88114418A EP88114418A EP0313769B1 EP 0313769 B1 EP0313769 B1 EP 0313769B1 EP 88114418 A EP88114418 A EP 88114418A EP 88114418 A EP88114418 A EP 88114418A EP 0313769 B1 EP0313769 B1 EP 0313769B1
Authority
EP
European Patent Office
Prior art keywords
straightening
wire
rotor
straightening rotor
blocks
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
EP88114418A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0313769A2 (de
EP0313769A3 (en
Inventor
Emil Denzler
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.)
HA Schlatter AG
Original Assignee
HA Schlatter AG
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 HA Schlatter AG filed Critical HA Schlatter AG
Priority to AT88114418T priority Critical patent/ATE73023T1/de
Publication of EP0313769A2 publication Critical patent/EP0313769A2/de
Publication of EP0313769A3 publication Critical patent/EP0313769A3/de
Application granted granted Critical
Publication of EP0313769B1 publication Critical patent/EP0313769B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening
    • B21F1/026—Straightening and cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening
    • B21F1/023—Straightening in a device rotating about the wire axis

Definitions

  • the invention relates to a method for the intermittent straightening of wire according to the preamble of patent claim 1 and a device for carrying out the method according to the preamble of patent claim 7.
  • Methods of this type are to be distinguished from those in which the wire is advanced with an undelayed feed rate even during the operation following the straightening, in particular a cutting operation following the straightening, and therefore the operating means performing the operation following the straightening, e.g. B. a cutting device for cutting the wire must be moved with the high feed rate with the wire.
  • the operating means performing the operation following the straightening e.g. B. a cutting device for cutting the wire must be moved with the high feed rate with the wire.
  • This z. B. from US-A-1 703 885 known methods have the advantage that the problem of heating and damage (burning, embrittlement, inhomogeneous material strength) of the stationary wire in the rotating straightening rotor does not arise, but the disadvantage that with the high wire feed speed with moving operating means, e.g. B. the so-called "flying scissors" cutting device is structurally complex and expensive.
  • the wire straightening device known therefrom has several conveyor roller groups for advancing the wire, adjustable shaping rollers , a straightening rotor with a cylindrical housing in which three straightening blocks are arranged, and a wire scanning device which checks the straightness of the straightened wire.
  • An adjusting device for the radial adjustment of the straightening blocks is arranged in the housing of the straightening rotor, which can be connected via a coupling to a motor which can be displaced by a displacement device when the straightening rotor is in a certain rotational position.
  • the wire feed speed and the angular speed of the straightening rotor are controlled by a control device based on the wire diameter and the wire material calculated and set.
  • the straightening rotor can optionally be connected (obviously via a one-way clutch) to an electric motor producing the angular speed for straightening and a stepping motor for rotating the rotor into the rotary position for setting the straightening blocks, the stepping motor being controlled by the control device after the straightening rotor has been stopped Electric motor has leaked.
  • Straightening is only interrupted if a new wire with different properties is to be used, which requires a different setting of the straightening blocks.
  • the generic method is also to be distinguished from those methods of another type, in which the wire is stopped during the operation, in particular the cutting process, and the straightening rotor is moved in the axial direction (longitudinal direction of the wire) with the wire stopped, in order to prevent excessive flexing work at one point and thus prevent the wire from becoming brittle or burning.
  • a method and an apparatus of that other type is known from US-A 2 172 134.
  • the straightening rotor is mounted on a carriage that can be moved back and forth on a pair of rods and is driven via a coupling.
  • the carriage is moved forward with the rotating straightening rotor when the wire is fed and backwards with the rotating straightening rotor when the wire is stationary and clamped by a gripper for cutting. At the end of the backward movement, the carriage hits a stop, whereby the coupling is disengaged and the straightening rotor runs out. After the wire has been cut to length, the grippers are opened and the carriage is moved forward again, the clutch being engaged and the piece of wire previously directed when the carriage runs backwards runs through the grippers.
  • the complex and error-prone, very fast movement of the surgical means e.g. B. the so-called flying shears, and moving the straightening rotor in the wire direction (in the direction of the straightening rotor axis) is omitted in the generic method known from CH-A-475 806.
  • the wire is cut at a standstill and the straightening stones of the rotating straightening rotor are moved hydraulically or pneumatically during the time of the wire standstill in such a way that the flexing work is reduced and thus the wire becomes brittle and burned out.
  • the radial adjustment of the straightening stones of the rotating straightening rotor is also complex and prone to failure.
  • the invention has for its object to provide a method and a device of the type mentioned that work simple, trouble-free and with a high production rate and ensure a perfect, homogeneous, uniform wire quality over the entire length of the wire (strength, uniform elongation, etc.).
  • the material properties of the wire are changed homogeneously by the straightening in the longitudinal direction of the wire and the straightened wire maintains in particular an approximately constant strength and uniform elongation over its entire length, that is to say in particular that with the first delayed and then again accelerated feed through the wire section, which was likewise decelerated and then again accelerated, attains the same or at least almost the same strength and uniform expansion as the rest of the wire, which runs at constant feed speed through the wire rotating at constant angular speed.
  • the method according to the invention can basically be carried out in the two following embodiments.
  • the wire is decelerated or braked to a reduced feed rate and the straightening rotor to a reduced angular rate, and in the reduced feed rate the operating means, in particular the cutting device, are moved synchronously with the wire.
  • the wire and straightening rotor are accelerated again and the operating means or the cutting device moves back to its starting position in order to be ready for the next cut.
  • the wire is decelerated to a complete standstill and the straightening rotor either also to a complete standstill or to such a low angular velocity that the quality of the wire is not impaired. In this case, the operation following the straightening or the cutting to length takes place when the wire is at a standstill with fixedly arranged or mounted operating means or a fixedly arranged cutting device.
  • the first embodiment is structurally more complex than the second, but enables higher production rates.
  • a cutting device can be used which is designed in the manner of the cutting device known from US-A-1 703 885 (so-called "flying scissors"), the construction effort and the susceptibility to faults being significantly lower due to the delayed wire feed speed.
  • Both types of design can be optimally adapted to the cycle times of subsequent and preceding machine groups.
  • the device for straightening and cutting wire 1 has two pairs of rollers 2 for accelerating, uniformly moving and braking the wire 1, a stationary cutting device 10 for cutting the wire 1 at a standstill, and a guide tube 3 in front of and behind a straightening rotor 4 with a rotor body 8
  • a straightening rotor 4 In the rotor body 8 there are three straightening stones 5, 6, 7, each with a counterweight 44 and two grub screws 40, 41, as well as a guide bushing 9 in front of and behind the three straightening stones 5, 6, 7.
  • the rotor body 8 is a one-piece component with three parallelepiped-shaped sections 11, 12, 13 and two circular-cylindrical regions 15 lying between these sections 11, 12, 13, as well as one circular-cylindrical shoulder 16, 17 for mounting and one hollow-cylindrical piece 18, 19 each for fixing a guide bushing 9
  • the axes of the circular cylindrical shoulders 16, 17, the hollow cylindrical pieces 18, 19, the two circular cylindrical regions 15 and d the diagonal intersections of the end faces of the cuboid sections 11, 12, 13 lie on the geometric axis of rotation 25 of the straightening rotor 4.
  • the axis of rotation 25 is also the axis of a cylinder bore 21 located in the rotor body 8, the diameter of which determines the stability of the entire straightening rotor 4 Wall thickness of the circular cylindrical regions 15 is given.
  • the outer diameter of the circular-cylindrical regions 15 is as large as the small side of the end face 34, 35 of the cuboid section 11, 12, 13.
  • Vertical to the small side of the cuboid section 11, 12, 13 are three cutouts 22, 23, 24 with clearance fits for the straightening stones 5, 6, 7 arranged.
  • the described configuration of the rotor body 8 is selected so that a minimal moment of inertia is achieved.
  • the straightening stones 5, 6, 7 have a flat, closed underside 29 and a groove 31 which is open towards the top 30 of the straightening stones 5, 6, 7.
  • the groove 31 runs in the middle of the top 30 of the straightening stones 5, 6, 7 and is in their width by a tolerance larger than the wire diameter. The depth of the groove 31 is so great in its non-widened part that it completely receives the wire to be straightened.
  • the two side walls 33 and the end faces 34, 35 run vertically upward from the flat underside 29. To the front end face 34, the groove 31 is expanded in a funnel shape to approximately twice the width of the original groove size, whereas the rear outlet has only an extension of approximately 20% and approximately ten percent of the total length of the alignment stone 5; 6, 7 is.
  • the depth of the non-widened groove 31 is approximately 40% of the height of the straightening stones 5, 6, 7.
  • the straightening stone 5, 6, 7 has the same height over its entire length.
  • the width of the rear end face 35 is two thirds of the front end face 34.
  • the front 34 and the rear end face 35 are parallel to one another and perpendicular to the axis of the groove 31 Spout has the straightening stone 5, 6, 7 on the top 30 a circular bulge 38, the diameter of which is approximately ten percent smaller than the width of the front end face 34, and which extends along the two long sides 33 to the bottom 29.
  • the circular bulge 38 in the straightening stone 5, 6, 7 is located in the force application point of the deflected wire 1.
  • the diameter of the bulge 38 is chosen so large that the bulge 38 on the one hand due to the clearance fit with thread 43 for the grub screws 40, 41 in the cutout 22, 23, 24 slips, and on the other hand, the smooth, closed bottom 39 of the grub screw 40 receives a good contact surface 42.
  • the side walls 33 in the area of the upper edge of the groove 31 outside the bulge 38 are only a fraction, preferably a third, of the groove 31 wide.
  • the position of the cutouts 22, 23, 24 for the straightening stones 5, 6, 7, and the guide bushes 9, as well as their dimensions, depend on the mechanical data of the wire 1 to be straightened.
  • the cutouts 22, 23, 24 are matched fits for the Straightening stones 5, 6, 7 are formed and have a thread 43 in the part which receives the bulge 38 of the straightening stones 5, 6, 7.
  • the front and rear straightening stones 5 and 7 deflect the wire 1 in one direction out of the axis of rotation 25, while the middle straightening stone 6 deflects it in the opposite direction.
  • the grooves 31 of the straightening stones 5, 6, 7 are open in the direction of their displacement from the axis of rotation 25, the straightening stones 5, 7 in the same radial direction and the straightening stone 6 opposite Axis are offset.
  • the straightening stones 5, 6, 7, By displacing the straightening stones 5, 6, 7, the flexing work of the wire 1 necessary for straightening during the rotation of the straightening rotor 4 and the associated relaxation of the wire material is achieved. Since the straightening stones 5 and 7 are offset in one direction and the straightening stone 6 in the opposite direction to the axis 25, a uniform mass distribution can be achieved by the straightening stone 6 being arranged further away from the axis 25 than the straightening stones 5 and 7 .
  • a slight imbalance that may arise as a result of uneven wear or as a result of another arrangement of the straightening stones due to special wire properties can be compensated for by a counterweight 44 located in the thread 43 of the cutouts 23.
  • the mutual distance between the straightening stones 5, 6, 7 is smaller than their own length.
  • the outside diameter of the parts of the straightening rotor 4, which do not hold any straightening stones 5, 6, 7, is reduced to the extent necessary solely for mechanical stability in order to reduce the total moment of inertia. Openings between the straightening stones 5, 6, 7, as are provided in known straightening rotors for removing broken wire, have been deliberately avoided. If the wire breaks, the entire straightening rotor 4 can easily be replaced.
  • the straightening rotor 4, with its straightening stones 5, 6, 7 and guide bushes 9, is optimized for a wire diameter or wire type and can be exchanged as a whole unit in its bearing 46.
  • the grub screws 40, 41 are used to adjust the straightening stone 5, 6, 7 for optimal directivity in the wire 1.
  • the large front funnel 36 of each straightening stone 5, 6, 7 is mainly required only during the wire threading, while the smaller rear funnel 35 and the part of the front funnel 36 directly adjoining the force application point guide the wire in the groove 31 during operation.
  • the straightening rotor 4 is driven by a DC motor 51 via a toothed belt 50 which meshes with the hollow cylindrical piece 18 of the front end part 27 of the rotor 4 which is designed as a toothed belt wheel 48.
  • the upper rollers or wheels of the roller pairs 2 are connected to one another by a toothed belt 52 and, together via a toothed belt 54, are likewise driven by the DC motor 51.
  • Two toothed belt pulleys 56, 57 of different diameters are seated on the output shaft of the DC motor 51, with which the toothed belts 50, 54 mesh, the transmission ratios being dimensioned such that the straightening rotor 4 rotates at a greater angular speed than the roller pairs 2.
  • the DC motor 51 is fed by a servo amplifier 58 with a controller (PID proportional controller) controlled by a control device 60 (NC or CNC control), which controls the current on the basis of the set values delivered in a time sequence by the control device 60 and those of a tachometer 62 Measured actual values of the angular velocity of the output shaft of the motor 51 controls and regulates.
  • the respectively advanced wire length is determined by the control device 60 by means of an incremental encoder (incremental rotary encoder) 64 arranged on the output shaft of the motor 51. (The actual value of the angular velocity can also be determined using the increment encoder 64, the tachometer 62 being omitted).
  • the total mass moment of inertia of the straightening rotor 4 which is effective during rotation is so small that it decelerates in the same time as the wire 1 with the pairs of rollers 2. and is accelerable.
  • the cutting device 10 and the drive means 48-58 of the roller pairs 2 and the straightening rotor 4 are controlled by the control device 60 in such a way that the roller pairs 2 and the straightening rotor 4 are decelerated synchronously with one another until they come to a standstill and then accelerated synchronously with one another before the cutting device 10 is activated are, whereby due to the common drive of the straightening rotor 4 and the roller pairs 2 (with different translation), the angular speed of the straightening rotor 4 is increased or decreased in proportion to the feed speed of the wire 1.
  • the ratio can be changed for different wire types by replacing the toothed belt pulleys, or, in deviation from FIG. 8, two independent drive devices can be provided for driving the straightening rotor 4 and the drive rollers 2, the controllers of which are controlled jointly by the control device 60, so that the Ratio can be set by the control device depending on the wire type or possibly also depending on the speed.
  • the wire 1 and the straightening rotor 4 are accelerated from standstill to a predetermined feed and angular velocity v 1, w 1, the angular velocity w of the straightening rotor 4 being increased synchronously and proportionally to the feed velocity v.
  • the wire 1 and straightening rotor 4 are moved at a constant speed v1, w1, and in the third phase starting at t3, the wire 1 and straightening rotor 4 are retarded by decelerating the speed of the motor 51 to braked to a standstill, the motor 51 operating as a braking device controlled and regulated by the control device 60 and the regulator, and the angular speed of the straightening rotor 4 being reduced synchronously and in proportion to the feed speed of the wire 1 in accordance with the first phase.
  • the driver 65 of the fixedly arranged cutting device 10 is removed from the Control device 60 controlled and the wire 1 cut to length, whereupon the next cycle begins with the first phase of the synchronous acceleration of straightening rotor 4 and wire 1.
  • the feed speed v 1 can be, for example, 2-5 m / sec and the angular speed w 1 can be selected so that the straightening rotor executes one revolution at a wire feed of 5 to 25 mm, so the angular speed w 1 z. B. is 12,000 revolutions per minute.
  • the delay time t4-t3 for the delay of the straightening rotor 4 (and the wire 1) from the angular velocity w1 to standstill.
  • the extremely short acceleration and deceleration time is achieved thanks to the extremely low mass moment of inertia of the straightening rotor 4, which is achieved by the above-mentioned construction and which is two orders of magnitude (approximately a hundred times) smaller than that of conventional straightening rotors.
  • the second phase of the even movement can be omitted, ie wire 1 and straightening rotor 4 can be accelerated and decelerated immediately in succession. If the wire straightening and cutting machine upstream or downstream machines or machine groups in a production line have a longer work cycle, a waiting cycle can be connected to the cutting of the wire 1, after which the first movement phase is continued again.
  • a pair of rollers 2 can also be arranged in front of and one behind the straightening rotor 4, or there can also be only pairs of rollers which pull the wire 1 through the rotor 4.
  • the arrangement to be selected depends on the wire data and the required straightening qualities. In general, however, pull rolls 2 behind the straightening rotor 4 deteriorate the straightening quality of the wire 1.
  • the straightening rotor (and possibly also the conveying means) can also be driven hydraulically instead of by an electric motor, wherein the hydraulic fluid can simultaneously be used to cool the rotor.
  • the grub screw 41 acting on the underside 29 of the alignment stone 5, 6, 7 can be replaced by a spring arranged in the cutout.
  • straightening rotors 4 are provided for ongoing operation.
  • the straightening rotor 4 is taken as a whole with its two bearings from the two bearing brackets 46, which are fixed with two screws each.
  • Each of the straightening rotors 4 is tailored to the relevant wire type to be straightened by appropriate dimensioning of the straightening stones and guide bushes 9 and their position in the straightening rotor 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Coating With Molten Metal (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electric Cable Installation (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP88114418A 1987-10-01 1988-09-03 Verfahren und Vorrichtung zum intermittierenden Richten von Draht Expired - Lifetime EP0313769B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88114418T ATE73023T1 (de) 1987-10-01 1988-09-03 Verfahren und vorrichtung zum intermittierenden richten von draht.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3819/87A CH673605A5 (enrdf_load_stackoverflow) 1987-10-01 1987-10-01
CH3819/87 1987-10-01

Publications (3)

Publication Number Publication Date
EP0313769A2 EP0313769A2 (de) 1989-05-03
EP0313769A3 EP0313769A3 (en) 1989-05-31
EP0313769B1 true EP0313769B1 (de) 1992-03-04

Family

ID=4264148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114418A Expired - Lifetime EP0313769B1 (de) 1987-10-01 1988-09-03 Verfahren und Vorrichtung zum intermittierenden Richten von Draht

Country Status (8)

Country Link
US (1) US4920776A (enrdf_load_stackoverflow)
EP (1) EP0313769B1 (enrdf_load_stackoverflow)
JP (1) JPH01107931A (enrdf_load_stackoverflow)
AT (1) ATE73023T1 (enrdf_load_stackoverflow)
CA (1) CA1311177C (enrdf_load_stackoverflow)
CH (1) CH673605A5 (enrdf_load_stackoverflow)
DE (1) DE3868844D1 (enrdf_load_stackoverflow)
ES (1) ES2031196T3 (enrdf_load_stackoverflow)

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EP2555902B1 (en) 2010-03-31 2018-04-25 Sciaky Inc. Raster methodology for electron beam layer manufacturing using closed loop control
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CN106583597A (zh) * 2016-11-21 2017-04-26 上海航天精密机械研究所 一种钻头加长杆的快速精密制作方法
CN107297443B (zh) * 2017-06-12 2020-04-21 武城县光明电力工程有限公司 一种电力用钢缆拉直装置
JP6588058B2 (ja) * 2017-08-04 2019-10-09 矢崎総業株式会社 電線矯正装置
US12036604B2 (en) 2017-10-09 2024-07-16 Sciaky, Inc. Electron beam additive manufacturing system and control components
US11426782B2 (en) * 2017-12-27 2022-08-30 Antonios Anagnostopoulos System for cleaning, protecting and lubricating hyperbolic rollers and bearings placed in a rotating rotor which is used for straightening wire, rod or reinforcing bar, using air and oil
EP3741476B1 (de) * 2019-05-20 2022-12-28 Schleuniger AG Richtvorrichtung zum begradigen einer leitung, verfahren zum bremsen von zumindest einer drehbaren rolle in einer richtvorrichtung, kabelverarbeitungsmaschine mit einer richtvorrichtung sowie upgrade-kit für eine kabelverarbeitungsmaschine
CN110976700A (zh) * 2020-03-02 2020-04-10 沈阳建筑大学 一种液压缸驱动压下的钢筋调直切断机
CN112122495B (zh) * 2020-09-07 2022-10-11 宁波仁邦五金科技有限公司 一种自动原料切断装置
CN112247020A (zh) * 2020-09-28 2021-01-22 湖南中科光电有限公司 一种光学器件生产制造的管线剪脚装置
CN112475118A (zh) * 2020-11-27 2021-03-12 安徽迪那通电线有限公司 一种电线生产用自动矫直机
CN116251909A (zh) * 2023-03-20 2023-06-13 建科机械（天津）股份有限公司 钢筋矫直切断设备和方法
CN117102396B (zh) * 2023-10-10 2024-02-27 石家庄峰岩电缆有限公司 一种具有拉直功能的线缆生产设备及其使用方法
CN117696680B (zh) * 2024-02-05 2024-06-18 中国重型机械研究院股份公司 一种用于钢管的压力矫直机
CN117920799B (zh) * 2024-03-22 2024-06-04 潍坊恒睿达铝业有限公司 铝合金管矫直扩孔一体机
CN118341916B (zh) * 2024-05-17 2025-02-11 东莞市冠标电工机械有限公司 一种金属拉丝机用剪线装置

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Also Published As

Publication number Publication date
ATE73023T1 (de) 1992-03-15
CH673605A5 (enrdf_load_stackoverflow) 1990-03-30
US4920776A (en) 1990-05-01
JPH0448536B2 (enrdf_load_stackoverflow) 1992-08-07
EP0313769A2 (de) 1989-05-03
JPH01107931A (ja) 1989-04-25
ES2031196T3 (es) 1992-12-01
DE3868844D1 (de) 1992-04-09
EP0313769A3 (en) 1989-05-31
CA1311177C (en) 1992-12-08

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