GB2092111A - Apparatus for winding metal strip - Google Patents

Apparatus for winding metal strip Download PDF

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Publication number
GB2092111A
GB2092111A GB8102702A GB8102702A GB2092111A GB 2092111 A GB2092111 A GB 2092111A GB 8102702 A GB8102702 A GB 8102702A GB 8102702 A GB8102702 A GB 8102702A GB 2092111 A GB2092111 A GB 2092111A
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GB
United Kingdom
Prior art keywords
mandrel
wrapper roll
stepped portion
signal
wrapper
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.)
Granted
Application number
GB8102702A
Other versions
GB2092111B (en
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Priority to GB8102702A priority Critical patent/GB2092111B/en
Publication of GB2092111A publication Critical patent/GB2092111A/en
Application granted granted Critical
Publication of GB2092111B publication Critical patent/GB2092111B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/10—Mechanisms in which power is applied to web-roll spindle
    • 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
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/02—Winding-up or coiling
    • B21C47/04—Winding-up or coiling on or in reels or drums, without using a moving guide
    • B21C47/06—Winding-up or coiling on or in reels or drums, without using a moving guide with loaded rollers, bolts, or equivalent means holding the material on the reel or drum
    • B21C47/063—Winding-up or coiling on or in reels or drums, without using a moving guide with loaded rollers, bolts, or equivalent means holding the material on the reel or drum with pressure rollers only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/40—Shafts, cylinders, drums, spindles
    • B65H2404/43—Rider roll construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/40—Shafts, cylinders, drums, spindles
    • B65H2404/43—Rider roll construction
    • B65H2404/432—Rider roll construction involving a plurality of parallel rider rolls

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

A wrapper roll 3 which presses a metal strip against a winding mandrel 2 is retracted slightly from the mandrel each time the leading end of the strip passes between it and the mandrel. The wrapper roll is retracted by a hydraulic actuator in response to retraction signals generated by an arithmetic circuit 12 and an adder amplifier circuit 18 calculating the time at which the leading end of the strip passes the wrapper roll. Two or three wrapper rolls around the mandrel may be retracted as the leading end of the strip passes by. The arrangement avoids damage to the winding apparatus and the surface of the metal strip. <IMAGE>

Description

SPECIFICATION Apparatus for winding metal strip The present invention relates to winding apparatus for winding a metal strip.
When the leading edge of a strip is gripped between a mandrel and a wrapper roll or when a portion of the strip overlying the leading edge (which will be referred to herein as the "stepped portion") passes past the wrapper roll after one or more turns of the strip are wound around the mandrel, the wrapper roll is subjected to impacts so that malfunctions can occur and/or damage to the mechanical system associated with the wrapper roll and/or damage or surface flaws to the wrapper strip may result. In addition, the strip will not be coiled into the desired regular configuration.
In order to overcome these problems, a known device as shown in Figure 1 has been used. A strip a is pressed against a mandrel b by a wrapper roll c (of which more than one may be provided) when a pneumatic cylinder d is energized. A damping spring g is interposed between a bearing housing e and an arm fof the wrapper roll mounting so that the spring g absorbs the impacts caused when the leading edge or the stepped portion of the strip a passes between the mandrel b and the wrapper roll c. However, this damping system has been found not to be satisfactory in practice because of the values of the spring constant of the damping spring g and the stroke of the pneumatic cylinder d which are used.
It is therefore an object of the present invention to provide a winding machine of the type in which an actuating cylinder is used to press a wrapper roll against a mandrel and when the stepped portion of a strip passes between the mandrel and the wrapper roll, the wrapper roll is moved away from the mandrel so that substantially no shock or impact will be transmitted to the wrapper roll, thereby eliminating the necessity of providing a damping spring.
According to the present invention there is provided a winding apparatus for winding metallic strip including a rotatable mandrel, a wrapper roll, an actuator acting on the wrapper roll and adapted to press the metallic strip against the mandrel, first sensor means responsive to displacement of the wrapper roll by the stepped portion of the strip and adapted to generate a signal representative of the said displacement, second sensor means coupled to the mandrel adapted to generate a signal representative of the angle of rotation of the mandrel and arithmetic means responsive to the output signals from the first and second sensor means and adapted to calculate the time when the stepped portion will next pass the wrapper roll and to generate a retraction signal at that time whereby in response to the retraction signal the actuator is caused to retract the wrapper roll from the mandrel whenever the stepped portion passes the wrapper roll.
Winding apparatus of this type frequently includes two or more wrapping rolls and thus in accordance with a further aspect of the present invention there is provided a winding apparatus for winding metallic strip including a rotatable mandrel and a plurality of wrapper rolls disposed around the mandrel, each wrapper roll being provided with an actuator acting on the wrapper roll and adapted to press the strip against the mandrel and first sensor means responsive to displacement of the wrapper roll by the stepped portion of the strip and adapted to generate a signal representative of the said displacement, the apparatus further including second sensor means coupled to the mandrel adapted to generate a signal representative of the angle of rotation of the mandrel and arithmetic means responsive to the signals from the first and second sensor means and adapted to calculate the time when the stepped portion will pass each wrapper roll and to generate a retraction signal at that time for that wrapper roll, whereby in response to the retraction signal the respective actuator is caused to retract its associated wrapper roll from the mandrel whenever the stepped portion passes that wrapper roll.
The second sensor means preferably includes a first pulse generator and the arithmetic means preferably includes a stepped portion sensor responsive to the signal from the first sensor means and adapted to generate an output pulse signal indicative of the passage of the stepped portion past the or each wrapper roll, a counter for counting pulses from the first pulse generator in response to receipt of a pulse signal from the stepped portion sensor, a comparator and a second pulse generator adapted to generate a retraction signal in response to an output signal from the comparator.
Further features and details of the invention will be apparent from the following description of one specific embodiment which is given by way of example with reference to Figures 2 to 4 of the accompanying drawings in which: Figure 2 is a schematic side elevation of a winding machine in accordance with the present invention: Figure 3 is a detailed block diagram of an arithmetic circuit for determining the timing of retracting a wrapper roll as the stepped portion of a strip passes between the wrapper roll and the mandrel; and Figure 4 is a timing chart in which (A) shows the successive displacement of the wrapping roll 3, (B) the output from the accelerometer, (C) the output from the stepped portion detector, (D) the output pulses from the first pulse generator and E shows the timing of the "retraction pulses', E, E2 and E3 being that for the second, third and first wrapping rolls respectively.
Referring first to Figure 2, a strip 1 is shown being wrapped around a mandrel 2 by being pressed against the mandrel 2 by first, second and third wrapper rolls 3, 4 and 5. Each of the wrapper rolls 3, 4 and 5 is carried by an arm 6. For the sake of simplicity only the arm 6 associated with the roll 3 is shown and described. The arm 6 pivots about a pivot pin 7 when the piston of a hydraulic actuating cylinder 8 is extended or retracted, The hydraulic cylinder 8 is provided with pressure sensors 20 and 21 for sensing the pressures in front of and behind the piston respectively. An angular position sensor 10 is operatively coupled to the arm 6 so as to detect the angular position of the arm with respect to the pivot pin 7.A pulse generator 11 is operatively coupled to the shaft of the mandrel 2 and arranged to generate a pulse signal representative of the angular position of the mandrel 2. This pulse signal is delivered to an arithmetic or control circuit 12 for determining the timing of retracting each wrapper roll away from the mandrel when the leading edge or the stepped portion of the strip 1 passes between it and the mandrel.
The arithmetic circuit 12 is shown in more detail in Figure 3 and comprises a stepped portion sensor 13, which produces a signal 13', a counter 14 for counting the pulses, designated 11', transmitted from the pulse generator 11, a comparator 1 5 and a pulse generator 1 6. In response to the pulse signal from the pulse generator 11 and the output signal from an accelerometer or acceleration sensor 9 attached to the arm 6, the arithmetic circuit 1 2 generates a control signal 1 7 in response to which each wrapper roll 3, 4 or 5 is retracted away from the mandrel 2.
More specifically, the control signal 1 7 closes a contact 23 for a time period ATso that a signal 22 which determines the magnitude of displacement of the wrapper roll 3 is fed to an adder-amplifier 1 8 which also receives the output signals from the accelerometer 9 and the angular position sensor 10. In response to these input signals, the adderamplifier 1 8 delivers an output signal to a servo valve 19 which in turn controls the flow of the working fluid into and out of the hydraulic cylinder 8 so that the piston of the hydraulic cylinder 8 is extended or retracted.
Only the control system for the first wrapper roll 3 has been described, but it will be understood that the second and third wrapper rolls 4 and 5 are controlled, that is to say moved toward or away from the mandrel 2, by control systems substantially identical in construction to that described above.
In Figure 3, the output signal from the accelerometer 9 is shown as being fed to the stepped portion sensor 13, but it will be appreciated that instead any signal representative of the movement of the wrapper roll relative to the mandrel 2 may be used. For instance, the output signals from the pressure sensors 20 and 21 may be applied to the arithmetic circuit 12, but the present invention is described only in conjunction with the output signal from the accelerometer 9.
Briefly, the movement toward or away from the mandrel 2 of the wrapper rolls 3, 4 and 5 is controlled as follows. First, the time when the leading edge or the stepped portion of the metal strip 1 passes between the mandrel 2 and, for instance, the first wrapper roll 3 is detected and, based on this detected time, the time at which the leading edge or the stepped portion of the strip 2 will pass other, second and third, wrapper rolls 4 and 5 is calculated so that the wrapper rolls 4 and 5 may be retracted away from the mandrel 2 when the leading edge or the stepped portion of the strip 1 passes between them.
Referring next to Figure 4, the mode of operation will be described in more detail. Figure 4(A) shows the passage of the stepped portion of the strip I past the first wrapping roll 3. As the leading edge or the stepped portion passes past the first wrapper roll 3, the accelerometer 9 delivers a signal as shown in Figure 4(B) to the step portion sensor 1 3 which in turn generates pulses indicative of the passage of the leading edge or stepped portion as shown in Figure 4(C) when the amplitude of the output signal from the accelerometer exceeds a predetermined level.
Figure 4(D) shows the pulses representative of the angle of rotation of the mandrel 2, the pulse spacing being equal to 3600/n, where n is an integer. These pulses are generated by the pulse generator 11. As will be described in detail below, when the arithmetic circuit 12 has counted the number of pulses D which corresponds to the angular spacing a between the first and second wrapper rolls 3 and 4, the circuit 12 generates a "retraction" pulse as shown at E1 which represents the time when the stepped portion will pass between the mandrel 2 and the second wrapper roll 4.In like manner, when the arithmetic circuit 12 has counted the number of pulses D which corresponds to the angle a + /3, where P is the angle between the second and third wrapper rolls, or the angle a + p + y, where y is the angle between the third and first wrapper rolls, a "retraction" pulse as shown at E2 or E3 is generated and fed to the third or first wrapper roll respectively.
More specifically, the time when the stepped portion of the strip passes between the mandrel and the first wrapper roll 3 is referred to as the "reference time" to. At this time the accelerometer responds to the passage of the stepped portion so that the amplitude of the output signal suddenly rises as shown at (B) in Figure 4. This output signal is delivered to the stepped portion sensor 13 which in turn generates a detection pulse as shown at (C) in Figure 4. In response to this pulse, the counter 14 starts counting the pulses, shown at (D) in Figure 4 from the pulse generator 11.
When the number of pulses counted by the counter 14 coincides with the signal which has been previously applied to the comparator 1 5 and which is representative of the angle a between the first and second wrapper rolls 3 and 4, the comparator 1 5 generates an output signal which triggers the second pulse generator 1 6 to generate a "retraction" signal as shown at E1 in Figure 4. In like manner, when the counter 14 counts the number of pulses corresponding to the angle P between the second and third wrapper rolls 4 and 5 (that is, the total number of pulses counted corresponds to the angle a + ), a "retraction" signal for the third wrapper roll 5 is generated as shown at E2.When the counter 1 4 further counts the number of pulses corresponding to the angle y between the third and first wrapper rolls 5 and 3 (that is, the total number of pulses counted corresponding to the angle a + ,B + y = 3600), the second pulse generator 16 generates a "retraction" signal for the first wrapper roll 3 as shown at E3. These "retraction" signals are delivered to the respective adderamplifiers 18 of the corresponding control systems so that the second, third and first wrapper rolls 4, 5 and 3 are retracted or moved away from the mandrel 2 when the stepped portion of the strip 1 passes them in the manner described above.
In summary, the time when the stepped portion of the strip 1 passes each of the wrapper rolls 3, 4 and 5 is detected and in response to the detached signal the hydraulic cylinder 8 in each control system is so energized as to retract the corresponding wrapper roll 3, 4 or 5 exactly at the time when the stepped portion of the strip 1 passes between this wrapper roll and the mandrel 1. Even when the number of layers of the strip 1 on the mandrel is increased to three or four, the time when the stepped portion of the strip 1 will pass each wrapper roll can be predicted relative to the reference time when the stepped portion passes, for instance, the first wrapper roll 3 in the manner described above so that every time when the stepped portion passes the wrapper rolls, the latter can be automatically retracted away from the mandrel 2.
The reference time has been described as the time when the stepped portion passes the first wrapper roll 3, but it is to be understood that the reference time may be the time when the stepped portion passes the second or third wrapper roll 4 or 5.
Thus the time when the stepped portion of a strip will pass each wrapper roll can be detected or predicted relative to the reference time when the stepped portion has passed a specified wrapper roll so that each wrapper roll can be retracted away from the mandrel whenever the stepped portion passes between the wrapper roll and the mandrel. As a result, impacts and thus damage to the wrapper rolls, the mechanical systems associated with the wrapper rolls and the strip itself can be minimised or eliminated.

Claims (5)

1. Winding apparatus for winding metallic strip including a rotatable mandrel, a wrapper roll, an actuator acting on the wrapper roll and adapted to press the metallic strip against the mandrel, first sensor means responsive to displacement of the wrapper roll by the stepped portion of theWstrip and adapted to generate a signal representative of the said displacement, second sensor means coupled to the mandrel adapted to generate a signal representative of the angle of rotation of the mandrel and arithmetic means responsive to the output signals from the first and second sensor means and adapted to calculate the time when the stepped portion will next pass the wrapper roll and to generate a retraction signal at that time whereby in response to the retraction signal the actuator is caused to retract the wrapper roll from the mandrel whenever the stepped portion passes the wrapper roll.
2. Winding apparatus for winding metallic strip including a rotatable mandrel and a plurality of wrapper rolls disposed around the mandrel, each wrapper roll being provided with an actuator acting on the wrapper roll and adapted to press the strip against the mandrel and first sensor means responsive to displacement of the wrapper roll by the stepped portion of the strip and adapted to generate a signal representative of the said displacement, the apparatus further including second sensor means coupled to the mandrel adapted to generate a signal representative of the angle of rotation of the mandrel and arithmetic means responsive to the signals from the first and second sensor means and adapted to calculate the time when the stepped portion will pass each wrapper roll and to generate a retraction signal at that time for that wrapper roll, whereby in response to the retraction signal the respective actuator is caused to retract its associated wrapper roll from the mandrel whenever the stepped portion passes that wrapper roll.
3. Apparatus as claimed in Claim 1 or Claim 2 in which the second means includes a first pulse generator.
4. Apparatus as claimed in Claim 3 in which the arithmetic means includes a stepped portion sensor responsive to the signal from the first sensor means and adapted to generate an output pulse signal indicative of the passage of the stepped portion past the or each wrapper roll, a counter for counting pulses from the first pulse generator in response to receipt of a pulse signal from the stepped portion sensor, a comparator and a second pulse generator adapted to generate a retraction signal in reponse to an output signal from the comparator.
5. Apparatus for winding metallic strip substantially as specifically herein described with reference to Figures 2, 3 and 4 of the accompanying drawings.
GB8102702A 1981-01-29 1981-01-29 Apparatus for winding metal strip Expired GB2092111B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8102702A GB2092111B (en) 1981-01-29 1981-01-29 Apparatus for winding metal strip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8102702A GB2092111B (en) 1981-01-29 1981-01-29 Apparatus for winding metal strip

Publications (2)

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GB2092111A true GB2092111A (en) 1982-08-11
GB2092111B GB2092111B (en) 1984-09-19

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136776A (en) * 1983-02-26 1984-09-26 Ishikawajima Harima Heavy Ind Controlling the wrapper rolls of a strip coiler
WO2008083792A1 (en) * 2007-01-10 2008-07-17 Sms Siemag Ag Winder for winding strips

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136776A (en) * 1983-02-26 1984-09-26 Ishikawajima Harima Heavy Ind Controlling the wrapper rolls of a strip coiler
WO2008083792A1 (en) * 2007-01-10 2008-07-17 Sms Siemag Ag Winder for winding strips
CN101605709B (en) * 2007-01-10 2011-10-12 Sms西马格股份公司 Winder for winding strips
US8302899B2 (en) 2007-01-10 2012-11-06 Sms Siemag Aktiengesellschaft Winder for winding strips

Also Published As

Publication number Publication date
GB2092111B (en) 1984-09-19

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PE20 Patent expired after termination of 20 years

Effective date: 20010128