US20030121304A1 - Apparatus for the production of stretched wire - Google Patents

Apparatus for the production of stretched wire Download PDF

Info

Publication number
US20030121304A1
US20030121304A1 US10/310,934 US31093402A US2003121304A1 US 20030121304 A1 US20030121304 A1 US 20030121304A1 US 31093402 A US31093402 A US 31093402A US 2003121304 A1 US2003121304 A1 US 2003121304A1
Authority
US
United States
Prior art keywords
wire
stretched
stress
stretching
clamping device
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.)
Abandoned
Application number
US10/310,934
Other languages
English (en)
Inventor
Carsten Schauhoff
Rene Aschwanden
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
Assigned to H.A. SCHALATTER AG reassignment H.A. SCHALATTER AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHAUHOFF, CARSTEN, ASCHWANDEN, RENE
Publication of US20030121304A1 publication Critical patent/US20030121304A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F9/00—Straining wire

Definitions

  • the invention relates to an apparatus for the production of discontinuously stretched wire, with two spaced-apart clamping devices, at least one of which is capable of being moved by the amount of a stretching length. Further, a plant with such an apparatus preceding it is claimed. In addition, the invention relates to methods for the industrial production of discontinuously stretched wire.
  • KR cold-rolled steel wire
  • the wire is formed by the amount of 15% to 25%.
  • Cold-formed wires have increased strength, as compared with a rolled wire, but at the same time the material becomes more brittle and the elasticity falls.
  • Hot-rolled and ribbed steel wire is rolled in the incandescent state to the nominal dimension. In the last rolled stand, a ribbing is applied to the rolled wire. So that the yield point (R e ) reaches a higher value than is normally afforded in the case of a WR, the WR may be cold-formed in an additional work step. For example, the WR is cold-formed by stretching.
  • the first main group constitutes continuous stretching, in this case a multiaxial or uniaxial stress being exerted on the wire.
  • Continuous stretching with multiaxial stress is the method adopted most frequently for the production of stretched wire.
  • the wire is drawn through upper and lower rolls which are displaced relative to one another in their axial orientation in such a way that the wire is drawn through these rolls in a serpentine manner.
  • Combination plants, which combine the cold-rolling and stretching operations, are often used for this purpose.
  • a uniaxial stress is applied to the wire.
  • the wire is led around a first roll in the opposite direction and again in the drawing direction over a second roll which is arranged in the opposite direction to the tensile force with respect to the first roll.
  • the wire is led in the form of a horizontal 8 .
  • This method for the production of stretched wire is hardly used nowadays because of the high outlay in mechanical terms and the lack of flexibility.
  • a further possibility for discontinuous stretching with uniaxial stress belongs to the second main group.
  • the wire is stretched, straightened and cut in a combined manner. Due to what may be referred to as the start/stop mode of operation, this method is appreciably slower than continuous methods.
  • the object of the invention is to provide an apparatus and the associated method which allows a discontinuous stretching of wire at high speeds and with high production reliability.
  • an apparatus for the industrial production of discontinuously stretched wire has two spaced-apart clamping devices, at least one of which is capable of being moved by the amount of a return stroke and at least one of which is equipped with a sensor for determining the wire stress.
  • industrial production is meant production in quantities. This is in contrast to test arrangements, in which individual wires are machined and processed in order to arrive at test results, for example in a destructive test for checking the maximum tensile strength.
  • the wire is delivered as a rolled-wire bundle in the form of a coil.
  • the one clamping device capable of being moved by the amount of the stretching length, during stretching the wire is simultaneously straightened by virtue of plastic deformation. There is no need for any additional setting work, as in the case of straightening blades or roll-type straightening mills.
  • the wire stress is detected continuously by means of the sensor.
  • the detected values may be stored, assigned to a wire portion. Wire portions produced thereafter are checked merely with regard to their final values. Stretching can automatically be adapted continuously on the basis of statistic evaluations of the measured values.
  • a stress threshold value may be predetermined, at which the wire portion to be stretched is oriented absolutely straight.
  • the degree of stretching can thus be programmed continuously. Adaptations on the apparatus when different production lengths are to be produced may therefore be dispensed with. Further, in the event of a change in the diameter of the wire, the apparatus does not have to be converted.
  • Each wire portion is checked continuously by means of the values detected by the sensor and stored. Material strength fluctuations are detected during production, and the apparatus can be adapted continuously, according to the detected values, to the material to be processed. At the same time, any material faults or rejects are detected by the apparatus during production, and wires of lower quality can be separated out or be removed from the further process for the production of finished products. This prevents the situation where wire portions of lower quality are welded together with wire portions conforming to the standards in order to form structural-steel mats. Any rejects which there may be are merely individual wire portions, not entire structural-steel mats. This leads not only to a material saving, but also to an appreciable time saving in the production of structural-steel mats.
  • means for introducing or advancing the wire in the wire longitudinal direction are provided.
  • the rolled wire is introduced directly from the rolled-wire bundle into the apparatus according to the invention.
  • the rolled wire may be shot into the apparatus.
  • the means for introducing or advancing the wire ensures the feed during production, even when a change of the rolled-wire bundle takes place.
  • cut-to-length and preferably prestraightened wire portions can preferably be fed from a magazine or storage unit of the apparatus according to the invention transversely to the stretching direction.
  • the wire portions fed in this way are stretched to the apparatus and are subsequently further processed.
  • the apparatus is preferably provided with a roll-type straightening mill.
  • the latter prestraightens the wire to an extent such that it can be pushed through the apparatus more easily.
  • the rolls of the roll-type straightening mill are mounted displaceably, so that the distance between the rolls arranged above and below is adapted to the diameter of the wire preferably by automatic control.
  • the first mutually opposite rolls in the push-in direction can be mounted so as to be freely moveable.
  • the distance between the first two rolls can be detected and the following rolls can be positioned by mechanical control according to this distance. Further, a spring force can act on the displaceable rolls, which exerts on the wire a sufficiently high pressure force for the satisfactory guidance of the wire.
  • the wire may be bent straight, for example by straightening pressing.
  • Another possibility for prestraightening the wire is a straightening rotor with straightening blocks.
  • the apparatus according to the invention may be preceded by a flat-straightening machine which orients the wire, straight, prior to the stretching.
  • the roll-type straightening mill may be replaced essentially by any apparatus which, for example, at least prestraightens the wire by rolling, drawing or pressing.
  • a first roll-type advancing unit, a first clamping device, a straightening section and a second clamping device are arranged downstream of the roll-type straightening mill in the direction of advance of the wire.
  • the approximately prestraightened wire is led, by means of the first roll-type advancing unit, out of the roll-type straightening mill and through the first clamping device, the straightening section and the second clamping device.
  • the wire is stretched by the at least one moveable clamping device, preferably the first clamping device.
  • the first roll-type advancing unit may be arranged downstream of the first clamping device in the direction of advance of the wire, the roll-type advancing unit coming to rest within the straightening section.
  • the second clamping device may be capable of being moved.
  • both, the first and the second, clamping devices may be designed to be moveable.
  • the straightening section preferably has an adaptable length.
  • the roll-type straightening mill, the first roll-type advancing unit and the first clamping device are combined to form a unit of the apparatus, and the second clamping device is designed as a further unit of the apparatus which is displaceable relative to the first unit.
  • the second unit may be shortened, for example by means of a worm drive, from a predetermined maximum length of the straightening section to any desired dimension.
  • the maximum length of the straightening section is in interrelation with the length of travel of the moveable clamping device, the said travel resulting from the degree of stretching.
  • a second roll-type advancing unit which assists the wire transport, may be arranged upstream of the second clamping device between the straightening section and the second clamping device.
  • the arrangement of the second roll-type advancing unit may be advantageous particularly in the case of high numbers of cycles of the apparatus.
  • these are preferably operated synchronously. In a variant, for example, only one of the roll-type advancing units is actively operated and the other roll-type advancing unit corotates passively.
  • the wire can be maintained under prestress by means of the second roll-type advancing unit.
  • the first clamping device which is arranged on the entry side and is capable of being moved by the amount of the stretching length, is preferably arranged on a linear hydraulic power booster which can execute freely programmable travels.
  • a rolled wire is stretched preferably by the amount of 3% to 5% in the apparatus according to the invention.
  • the necessary stroke or the executable travel of the first clamping device thus amounts to somewhat more than 5% of the length of the maximum straightening section.
  • another tensioning device may also be provided.
  • the second clamping device may be arranged on a linear hydraulic power booster, in this variant the first clamping device arranged on the entry side being arranged fixedly. Further, both clamping devices may be arranged on linear hydraulic power boosters. In such an arrangement, the clamping devices are moved preferably simultaneously away from one another or alternately in opposite directions until the rolled wire has been lengthened by the amount of the desired stretching dimension.
  • a pressure cell is arranged as a sensor on the fixed clamping device.
  • the pressure cell may operate, for example, on the basis of a spring (spring principle) or on the basis of hydraulic pressure (hydraulic principle).
  • the data from the pressure cell are stored in a control unit and are made available for the further production of stretched wire. Discontinuous stretching with simultaneous (online) quality control is made possible by means of the measured and stored values.
  • the stored final values may be used further for statistic evaluation for the individual stretched wire portions.
  • a stress threshold value may also be defined, which lies unquestionably on the elastic straight line of the stress/strain diagram of the rolled wire, thus ensuring that the wire is oriented absolutely straight and that stretching has commenced.
  • the apparatus preferably has a cutting unit arranged on the exit side, in order to cut the stretched wire to length.
  • the stretched wire is cut to the desired length by means of a cutting device, for example a shear arrangement.
  • the stretched wire may also be cut to length by means of a cutting torch.
  • a receptacle For receiving the cut-to-length wires, a receptacle is preferably arranged at the exit of the apparatus according to the invention, the said receptacle preventing the cut-to-length wires from falling to the ground and making the wires available for further processing. If the apparatus is preceded by a wire-mesh welding machine, the receptacle serves as a material repository or storage region, from which the wires required are extracted by a feed device of the wire-mesh welding machine.
  • the apparatus comprises a control device which sets the stretching length on the basis of the wire stress measured by the sensor. If the total length of the wire portion to be stretched amounts to more than the length of the straightening section, which is determined by the distance between the first and the second clamping device, in a first step the wire portion is lengthened by the amount of the maximum possible stretching length which is in a percentage relation to the straightening section. Subsequently, the wire is advanced by the missing amount of the desired total length and is stretched once again, in the same percentage relation, by an amount which results from the amount of the advance.
  • the stretching length is automatically adapted, by means of the control, to the length of the straightening section or of the advance.
  • the control is typically designed as a module and is not installed permanently in the apparatus. It is thereby possible for the control to be employed, adapted according to the user's requirements or to the local conditions.
  • a plant with a wire-mesh welding machine is preceded by an apparatus according to the invention for the production of discontinuously stretched wire.
  • the stretched and cut-to-length wire portions are made available directly to the wire-mesh welding machine for further processing and can be taken over from a wire feed device of the wire-mesh welding machine.
  • two apparatuses according to the invention for the production of discontinuously stretched wire may precede a plant having a wire-mesh welding machine.
  • One of the apparatuses according to the invention produces the transverse wires and the other apparatus produces the longitudinal wires.
  • the stretched wires required is [sic] extracted from the corresponding intermediate stores, for example by means of two feed devices of the wire-mesh welding machine, and is [sic] positioned for further processing.
  • a wire portion to be machined is gripped by two clamping devices and is stretched.
  • a stress/strain dependence is recorded. This is stored, assigned to the wire portion, for further processing.
  • a new wire is stretched in what may be referred to as a start/stop operating mode, and the stress/strain dependence for this specific wire portion is recorded.
  • the stretching of the further wire portions commences, with the apparatus at full capacity, and only the final values of each individual wire portion are checked.
  • the apparatus can be adapted correspondingly or the wire portion having the values lying outside the tolerance is separated out.
  • production reliability is ensured during the entire production of the wire portions and is improved, as compared with the known methods for a discontinuous stretching of wire portions, and also the quantity of rejects is reduced.
  • the method has the advantage that work can be carried out with high numbers of cycles and, compared with previous methods, production reliability is improved. If stretching is regulated by the tensile force, only stretching with low numbers of cycles is possible, since the force changes discontinuously from the commencement of stretching to the desired stretching length.
  • the stored values can be printed out for each rolled-wire bundle and also for each wire portion. This print-out may serve as a certificate of quality for the material of structural-steel mats. If the wires are sold on as semi-finished products, the printed-out list or a copy of this may be enclosed as a quality voucher with the wire bundle.
  • a quality control is provided, which satisfies any ISO standard and makes it possible to have reliable evidence of rod production.
  • the stretching length for a wire portion is automatically adapted continuously on the basis of statistic evaluations of the stress/strain dependence. Automatic adaptation takes place, for example, via the travel and/or the force. If the steel quality changes or a new rolled wire is introduced into the apparatus, the machine is adapted automatically.
  • operational documentation can be prepared from the production of the wire portions and may be used, on the one hand, for operating-data acquisition and, on the other hand, for quality assurance.
  • the stretching length for a wire portion is related to a stress threshold value which defines the conclusion of a preflattening phase.
  • a value is defined as a control point on the elastic straight line, the said value ensuring that the wire portion is absolutely straight.
  • the wire is flattened.
  • the end of the “gradation phase” can be determined by means of the stress threshold value.
  • a rolled wire delivered as a bundle must first be oriented absolutely straight, so that stretching is carried out in the required size and quality. As soon as the sensor detects that the wire is absolutely straight even at a lower value, where appropriate the stress threshold value can be reduced for the subsequent wire portions.
  • the stress threshold value is determined individually for each wire portion.
  • the sensor detects when the wire is in an absolutely straight position and the applied force is used solely for stretching and no longer straightens the wire.
  • the wire is introduced automatically in the wire longitudinal direction and is cut to length automatically after stretching.
  • FIG. 1 shows a stress/strain diagram for a hot-rolled and ribbed wire (WR) in the rolled and stretched state
  • FIG. 2 shows an exemplary arrangement of a stretching machine according to the invention.
  • FIG. 1 illustrates a stress/strain diagram for a hot-rolled and ribbed wire (WR) in the rolled and stretched state.
  • the strain ⁇ is plotted on the abcissa axis 2 of the diagram 1 and the stress C is plotted on the ordinate axis 3 .
  • the curve 4 illustrates the characteristic curve of a naturally hard steel—here a rolled wire—In the stress/strain diagram.
  • the wire is drawn and reaches its yield point R e . Up to this point, the steel is in its elastic range and would resume its original length if the tensile force were removed. Beyond the yield point R e , under a further action of force, the steel begins to flow (what is known as the flow plateau) .
  • the stress in the steel rises further from the end of the flow plateau 5 to the maximum tensile strength R m (here also designated as the point 6 ).
  • the region 7 from the zero point to the yield point Re is designated as elastic strain.
  • the region 8 from the yield point Re to the tensile strength R m (point 6 ) is designated as the plastic strain.
  • the stretched wire portion is minimally shortened, as illustrated by the point 10 .
  • the steel behaves essentially the same way as a cold-formed wire on which the ribs and also the reduction in diameter due to elongation have been produced by cold-forming.
  • the stretched WR has better strain properties than a ribbed KR.
  • the WR has a new yield point R er which, in terms of the value of the stress ⁇ , is nearer (by the difference between the yield point R e and the yield point R er ) to the tensile strength R m than in the case of a non-stretched wire.
  • the wire behaves elastically again in the region 11 and plastically in the region 12 .
  • a preferred yield-point ratio is achieved by means of the stretching, the better strain properties of the rolled wire being essentially maintained.
  • a stress threshold value 16 can therefore be defined, which either is determined individually for each wire portion to be stretched or is determined as a fixed value. As soon as, for example, a pressure cell measures the stress threshold value, there is the certainty that the preflattening phase is concluded and actual stretching commences.
  • the stress threshold value 16 amounts, for example, to 200 N/mm 2 , which corresponds approximately to one third of the yield point Re of the wire material. This stress threshold value 16 may be set even higher in the case of sharply bent wire material, in which case the value of the stress threshold value 16 should lie preferably clearly below the value of the yield point Re ( ⁇ 500 N/mm 2 )
  • the various phases can be determined computationally from the characteristic curve 4 .
  • FIG. 2 An exemplary arrangement of a stretching machine according to the invention is shown in FIG. 2.
  • the stretching machine 21 comprises on the entry side (on the left in relation to the drawing) a roll-type straightening mill 22 which is followed by a first roll-type advancing unit 23 . There then follows a first clamping device 24 arranged on a hydraulic linear booster 25 , on which the first clamping device 24 is capable of being moved horizontally in a controlled manner. These components form a first part 26 of the stretching machine 21 .
  • a second part 27 is formed by a second clamping device 28 which comprises a cutting device 29 .
  • the second part 27 may comprise, further, a second roll-type advancing unit.
  • the wire 31 can be maintained under prestress, or the said unit serves for assisting the first roll-type advancing unit 23 during the advance of the wire 31 .
  • the length of the straightening section 32 may be varied, as required, by the stretching machine 21 being divided into a first part 26 and a second part 27 which are capable of being moved relative to one another by means of a separate device (not illustrated here) .
  • the first part 26 may be mounted fixedly on a stand and the second part 27 may be fixed, for example, on a worm gear which is operated by means of a motor.
  • the length of the straightening section 32 can consequently be adapted to the production requirements.
  • the straightening section 32 is formed, for example, by a stable steel girder (for example, a U-profile, such as a UNP or UAP) .
  • the straightening section 32 can be adapted in its length, for example, two U-profiles are arranged, which are capable of being pushed one into the other and which overlap one another according to the set length.
  • the second part 27 may be provided with a recess or be designed in such a way that the steel girder of the straightening section 32 passes through the said second part when the length of the straightening section 32 is shortened by the second part 27 being moved.
  • the straightening section 32 begins at the first clamping device 24 and ends at the second clamping device 28 .
  • the maximum straightening section 32 may be designed according to the user's wishes or requirements, the maximum stroke of the hydraulic linear booster 25 having to be taken into account. If, for example, the length of the straightening section is 4000 mm and the usual degree of stretching of 3% to 5% is to be carried out, the stroke of the moveable first clamping device 24 must amount to at least 200 mm. If the straightening section 32 is increased, for example, to 8000 mm, the stroke of the moveable first clamping device 24 would therefore have to amount to at least 400 mm according to the length of the straightening section 32 . With the means available at the present time, the length of the straightening section 32 is expediently to be limited to below 5000 mm for structural reasons and with a view to the production costs and also on grounds of the serviceability of the stretching machine 21 .
  • a wire portion having, for example, a length of 6000 mm is to be produced on a stretching machine 21 with a maximum straightening section 32 of 4000 mm
  • the following procedure is adopted: the wire is advanced to the length of 4 000 mm and, in the case of a degree of stretching of 5 %, is stretched by the amount of 200 mm. Subsequently, the wire is advanced once again by the amount of 2000 mm and is stretched once more by the amount of 100 mm. A wire portion with a length of 6000 mm, which has been stretched by the amount of 5%, has thus been produced.
  • the method for producing a discontinuously stretched wire is described below with reference to the stretching machine 21 .
  • the rolled-wire bundles 33 . 1 and 33 . 2 are provided on a double horizontal run-off 34 for machining in the stretching machine 21 .
  • a double horizontal run-off 34 for example, the end of the rolled-wire bundle 33 . 1 can be welded to the start of the rolled-wire bundle 33 . 2 , so that work can be carried out without interruption.
  • a new rolled-wire bundle is positioned on the run-off, and, if appropriate, its start is welded to the end of the rolled-wire bundle 33 . 2 . Wire portions can thus be produced in large quantities continuously and without interruption.
  • the start of, for example, the rolled-wire bundle 33 . 1 is introduced or shot into the stretching machine 21 and is prestraightened in the roll-type straightening mill 22 in such a way that it becomes easier for the wire 31 to be pushed through.
  • the wire 31 is thereafter gripped by the first roll-type advancing unit 23 which follows the roll-type straightening mill 22 .
  • the first roll-type advancing unit 23 consists of two oppositely directed rolls 35 . 1 and 35 . 2 , between which the wire 31 is advanced, and of two drives 36 . 1 and 36 . 2 which drive the rolls 35 . 1 and 35 . 2 in a controlled manner and are preferably coordinated with one another. Instead of two separate drives 36 . 1 and 36 .
  • the lower or upper rolls of the roll-type straightening mill 22 and of the first roll-type advancing unit 23 are mounted displaceably in one direction, for example in a vertical direction.
  • the neutral position of the rolls corresponds to the smallest wire diameter to be processed (for example, 4 mm), and the minimum latitude of movement of the displaceable rolls must correspond to the largest wire diameter to be processed (for example, 12 mm).
  • the setting of the interspace between the rolls may be carried out passively on the basis of the diameter of the pushed-in wire 31 or actively by mechanical control.
  • the rolling surfaces of the rolls may be coated with a deformable material which allows the machining of the entire diameter range (for example, 4 mm to 12 mm), without the rolls having to be displaced in one direction.
  • the wire 31 is advanced to the second clamping device 28 by means of the roll-type advancing unit 23 .
  • the first clamping device 24 and the second clamping device 28 are constructed in essentially the same way. They have at least two clamping jaws 37 . 1 , 37 . 2 and 38 . 1 , 38 . 2 which are moveable relative to one another and which clamp the wire 31 located between them.
  • the clamping jaws 37 . 1 , 37 . 2 and 38 . 1 , 38 . 2 are moved mechanically or hydraulically in a controlled manner.
  • the first clamping device 24 is arranged on a hydraulic linear booster 25 which can execute freely programmable travels.
  • the stretching force generated by the linear booster 25 amounts to about 70 kN and makes it possible to stretch a wire having a diameter of 12 mm up to its maximum yield point of about 630 N/mm 2 .
  • the wire 31 to be stretched is held by the first clamping device 24 and the second clamping device 28 .
  • the first clamping device is moved, in the clamping state, opposite to the push-in direction by the amount of the desired degree of stretching.
  • the front pair of rolls 35 . 1 and 35 . 2 has to rotate opposite to the push-in direction of the wire 31 so that the stretching travel is compensated.
  • the first stretched wire portion is produced in a start/stop operating mode (stop-and-go). As soon as the values for this roll-wire bundle have been detected and stored, the production of the stretched wires takes place. If differences in the measured final values are detected during production, the said differences lying outside the defined tolerance range, the force or the degree of stretching is adapted. At the same time, stretched wires which do not conform to the desired requirements or have material faults can be sorted out and removed from the further production process, for example in the production of structural-steel mats.
  • the stretched wire is transported further on by means of the first roll-type advancing unit 23 .
  • two roll-type advancing units are arranged in a stretching machine, these are preferably coordinated with one another (that is to say, synchronously) or operate actively or passively, depending on the position of the wire 31 .
  • a cutting device 29 Arranged at the second clamping device 28 is a cutting device 29 which cuts the stretched wire 31 to the desired length, for example by means of a shear device.
  • the stretching length for a wire portion is automatically adapted continuously on the basis of statistic evaluations of the stress/strain dependence.
  • the statistic evaluation is based on an average value which is prepared on the basis of a predefined number of, for example, fifty wire portions having measured and stored values.
  • the automatic adaptation of the stretching length may in this case take place, for example, via the travel and/or the force. If the steel quality changes or a new rolled wire is introduced into the apparatus, the machine is adapted automatically.
  • operational documentation can be prepared from the production of the wire portions and may be used, for example, for operating-data acquisition or for quality assurance.
  • the stretching length for a wire portion is related to a stress threshold value which defines the conclusion of a preflattening phase.
  • a stress threshold value which defines the conclusion of a preflattening phase.
  • a value is defined as a control point on the elastic straight line and ensures that the wire portion is absolutely straight.
  • Such a stress threshold value lies in the range of 200 N/mm 2 and 500 N/mm 2 in the case of wire material which is used for the production of structural-steel mats and which conforms to the critical standards.
  • a rolled wire delivered as a bundle must first be oriented absolutely straight, so that stretching is carried out in the required size and quality. As soon as the sensor detects that the wire is absolutely straight even at a lower value, if appropriate the stress threshold value can be reduced for the subsequent wire portions.
  • the advantage of this is that the number of cycles of the apparatus and therefore the quantity of stretched wire produced are increased.
  • the number of cycles of the apparatus according to the invention is based on the cycle time for the production of a wire portion, which is composed of the advance of the wire portion, the clamping of the two clamping devices, the stretching stroke and the opening of the clamps and also the sum of the intermediate times.
  • the wire 31 is drawn back completely and the new wire is pushed or shot into the stretching machine 21 .
  • manual adaptations of the individual devices of the stretching machine can be dispensed with, thus appreciably increasing the productivity of the stretching machine, as compared with the prior art.
  • the change of diameter can be automated by simple means.
  • a further possibility for increasing productivity is the arrangement of two units which are connected in parallel.
  • the two units can be operated by means of only one hydraulic assembly.
  • the stretching machine 21 may be used both as a stand-alone solution and as an integration in a plant for the production of structural-steel mats, the stretching machine preferably preceding the actual plant. That is to say, the wires stretched in the stretching machine are made available directly to the plant for the production of structural-steel mats and are taken over by the latter for further processing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
US10/310,934 2001-12-07 2002-12-06 Apparatus for the production of stretched wire Abandoned US20030121304A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01811192.2 2001-12-07
EP01811192A EP1317975A1 (fr) 2001-12-07 2001-12-07 Dispositif pour la fabrication de fil etiré

Publications (1)

Publication Number Publication Date
US20030121304A1 true US20030121304A1 (en) 2003-07-03

Family

ID=8184295

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/310,934 Abandoned US20030121304A1 (en) 2001-12-07 2002-12-06 Apparatus for the production of stretched wire

Country Status (4)

Country Link
US (1) US20030121304A1 (fr)
EP (1) EP1317975A1 (fr)
JP (1) JP2003236609A (fr)
CA (1) CA2411623A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102554115A (zh) * 2010-10-21 2012-07-11 上海春日机械工业有限公司 可减少线材废料的制造方法及实施该方法的锻造部件成型机
CN108246922A (zh) * 2018-03-01 2018-07-06 芜湖市海联机械设备有限公司 一种圆料矫直切断机
CN109750543A (zh) * 2018-11-29 2019-05-14 安徽欣海经编织造有限公司 一种编织机
CN117299846A (zh) * 2023-10-12 2023-12-29 杭州森盛金属制品有限公司 一种全自动钢丝拉伸加工成型装置及其加工工艺
CN117969272A (zh) * 2024-04-02 2024-05-03 德州锦城电装股份有限公司 一种便于取下的汽车线束拉力检测设备

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201226073A (en) * 2010-12-28 2012-07-01 Prec Machinery Res & Dev Ct Reciprocating-type straightening device of metal wire material and method thereof
CN102632166A (zh) * 2011-02-10 2012-08-15 财团法人精密机械研究发展中心 金属线材的往复式整直方法及其装置
CN103658456B (zh) * 2013-12-05 2015-09-23 青岛兴河建材有限公司 钢筋拉直装置夹持拉直机构
CN103658455B (zh) * 2013-12-05 2015-09-23 青岛昊河水泥制品有限责任公司 钢筋拉直装置
CN103658460B (zh) * 2013-12-05 2015-11-11 青岛昊河水泥制品有限责任公司 钢筋拉直装置夹持拉直机构
CN103658458B (zh) * 2013-12-05 2015-11-04 青岛兴河建材有限公司 钢筋拉直装置
CN106513539B (zh) * 2016-11-30 2018-07-20 国网山东省电力公司宁津县供电公司 一种单股弯曲导线调直装置
CN107716786B (zh) * 2017-10-28 2018-11-27 谢瑞珠 一种电缆拉直装置
CN109443922B (zh) * 2018-12-05 2021-06-08 吴叶鸿 一种基于紫铜丝物理特性的预形变弯折压头装置
CN110923893B (zh) * 2019-12-03 2020-10-02 安徽骄阳软门有限责任公司 一种加工金刚纱线用折压设备
CN111468644B (zh) * 2020-05-18 2022-01-11 抚顺领航特殊钢有限公司 一种钢丝废料拉直加工工艺
CN112893493B (zh) * 2021-02-05 2024-04-26 安徽众恒复合材料科技有限公司 一种可调节式自动拉线机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751838A (en) * 1985-11-18 1988-06-21 Red Bud Industries, Inc. Machine and process for leveling sheet metal strip
US5327634A (en) * 1991-09-04 1994-07-12 Salomon S.A. Process for improving elasticity of the edge of a ski
US5579658A (en) * 1994-10-22 1996-12-03 Bwg Berkwerk-Und Walzwerk-Maschinenbau Gmbh Method of and apparatus for producing large metal plates

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1007075B (it) * 1973-01-31 1976-10-30 Schloemann Siemag Ag Dispositivo per misurare l allunga mento percentuale di barre profila te in macchine stiratrici per pro filati
DE2523406A1 (de) * 1975-05-27 1976-12-16 Schmitz Soehne Gmbh J H Spannkopf mit integrierter messvorrichtung
JPH01273636A (ja) * 1988-04-27 1989-11-01 Hitachi Ltd 細線直線化方法および装置
JPH0760359A (ja) * 1993-08-27 1995-03-07 Showa Alum Corp 引張矯正装置
JPH08206762A (ja) * 1995-02-03 1996-08-13 Nippon Steel Corp 線材矯正装置
DE19705945A1 (de) * 1997-02-17 1998-08-20 Besta Eisen Und Stahlhandelsge Anlage zum Richten, Kaltverfestigen und anschließendem Bearbeiten von Drahtmaterial

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751838A (en) * 1985-11-18 1988-06-21 Red Bud Industries, Inc. Machine and process for leveling sheet metal strip
US5327634A (en) * 1991-09-04 1994-07-12 Salomon S.A. Process for improving elasticity of the edge of a ski
US5579658A (en) * 1994-10-22 1996-12-03 Bwg Berkwerk-Und Walzwerk-Maschinenbau Gmbh Method of and apparatus for producing large metal plates

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102554115A (zh) * 2010-10-21 2012-07-11 上海春日机械工业有限公司 可减少线材废料的制造方法及实施该方法的锻造部件成型机
TWI381892B (fr) * 2010-10-21 2013-01-11
CN108246922A (zh) * 2018-03-01 2018-07-06 芜湖市海联机械设备有限公司 一种圆料矫直切断机
CN109750543A (zh) * 2018-11-29 2019-05-14 安徽欣海经编织造有限公司 一种编织机
CN117299846A (zh) * 2023-10-12 2023-12-29 杭州森盛金属制品有限公司 一种全自动钢丝拉伸加工成型装置及其加工工艺
CN117969272A (zh) * 2024-04-02 2024-05-03 德州锦城电装股份有限公司 一种便于取下的汽车线束拉力检测设备

Also Published As

Publication number Publication date
JP2003236609A (ja) 2003-08-26
CA2411623A1 (fr) 2003-06-07
EP1317975A1 (fr) 2003-06-11

Similar Documents

Publication Publication Date Title
US20030121304A1 (en) Apparatus for the production of stretched wire
EP2493638B1 (fr) Procédé de production de tubes soudés à jonctions hélicoïdales, à géométrie de tube optimisée
EP2857119B1 (fr) Procédé de dilatation de tube pour la fabrication de tube métallique
JP2008529815A (ja) 棒材を剪断加工するための剪断加工装置を有する成形機械
KR20160058053A (ko) 금속 스트립 연결 방법
CN110116146B (zh) 一种高频焊管智能穿带方法
EP3826795B1 (fr) Dispositif et procédé de soudage bout à bout de pièces
AU2006349207B8 (en) Manufacturing equipment of electric resistance welding pipes having excellent characterization of welded seam
CN112828211A (zh) 大螺距大直径异形弹簧机
JP5686509B2 (ja) トランスファープレス成形装置
JP2007518574A (ja) 無欠陥鋼ゲージ棒の製造プロセス及びその製造設備
US11794230B2 (en) Drawing system for generating profiled metal sections, and method for automatically operating such a drawing system
US4018376A (en) Process for obtaining skeins of wire rod of a weight which is a multiple of that of a wirebar
CN212884685U (zh) 用于钢筋加工的调直机
EP1317976A2 (fr) Dispositif pour la fabrication de fil étiré
AT517335B1 (de) Verfahren und Vorrichtung zum Herstellen eines Metallbands mit weitgehend parallelen Bandkanten
DE202018006370U1 (de) Vorrichtung zum Stumpfschweißen von Werkstücken
DE19619034C2 (de) Verfahren zur Verbesserung der Umformbarkeit bei der Herstellung von Bauteilen aus Leichtmetallband
AT501551B1 (de) Verfahren und anlage zum herstellen von hochduktilem stahldraht aus warmgewalztem walzdraht
JP2004332107A (ja) 鋼線の熱処理方法
KR101421812B1 (ko) 레이저 용접을 위한 클램핑 다이
RU2074084C1 (ru) Линия для заготовки и упрочнения арматурных стержней
US20230117945A1 (en) Method and device for producing welded reinforcing meshes with high strength and expansion values
DE102006051301B4 (de) Verfahren zum Ausrichten und Formen von Teigrohlingen, insbesondere von zur Brezelherstellung vorgeformten Teigsträngen und System zur Durchführung des Verfahrens
CN115867409A (zh) 用于对金属带进行焊接的加工方法和加工设备

Legal Events

Date Code Title Description
AS Assignment

Owner name: H.A. SCHALATTER AG, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHAUHOFF, CARSTEN;ASCHWANDEN, RENE;REEL/FRAME:013790/0914;SIGNING DATES FROM 20021204 TO 20021229

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION