GB1576820A - Method and apparatus for cooling drawn wire - Google Patents

Method and apparatus for cooling drawn wire Download PDF

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Publication number
GB1576820A
GB1576820A GB157877A GB157877A GB1576820A GB 1576820 A GB1576820 A GB 1576820A GB 157877 A GB157877 A GB 157877A GB 157877 A GB157877 A GB 157877A GB 1576820 A GB1576820 A GB 1576820A
Authority
GB
United Kingdom
Prior art keywords
liquid coolant
elongate material
die
capstan
spray
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
Application number
GB157877A
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.)
BRIDEN WIRE Ltd
Hi Draw Machinery Ltd
Original Assignee
BRIDEN WIRE Ltd
Hi Draw Machinery Ltd
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 BRIDEN WIRE Ltd, Hi Draw Machinery Ltd filed Critical BRIDEN WIRE Ltd
Priority to GB157877A priority Critical patent/GB1576820A/en
Priority to SE7800058A priority patent/SE7800058L/en
Priority to DE19782800730 priority patent/DE2800730A1/en
Priority to US05/868,913 priority patent/US4214470A/en
Priority to BE2056600A priority patent/BE862875A/en
Priority to FR7800926A priority patent/FR2377240A1/en
Priority to IT7819243A priority patent/IT1091812B/en
Priority to ES465934A priority patent/ES465934A1/en
Priority to JP322778A priority patent/JPS5389859A/en
Publication of GB1576820A publication Critical patent/GB1576820A/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C9/00—Cooling, heating or lubricating drawing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • B21C1/14—Drums, e.g. capstans; Connection of grippers thereto; Grippers specially adapted for drawing machines or apparatus of the drum type; Couplings specially adapted for these drums

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)

Description

(54) METHOD AND APPARATUS FOR COOLING DRAWN WIRE (71) We, HI-DRAW MACHINERY LIM ITED, a British Company of P.O. Box 2, Dukes Mill, Romsey, Hampshire S05 8XQ; and BRIDON WIRE LIMITED, a British Company of Warmesworth Hall, Doncaster, Yorkshire, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement This invention relates to a method and apparatus for effecting cooling of elongate material after it has been drawn through a drawing die of drawing apparatus.
In the process of drawing elongate material such as wire, the material upon being drawn through the die or dies has its temperature substantially increased and the drawn material has to be cooled. The known methods of cooling the material can restrict the speed and production rate of drawing machines.
This problem is most severe on multi-die drawing machines where the material is successively drawn through two or more dies and the material can have its temperature increased to a value at which the properties of the material are adversely affected.
It is known to pass the drawn material through a trough or tube containing water but this substantially increases the overall length of the drawing machine which makes threading of the material through the machine difficult. Large quantities of water have to be provided.
It is also known to water cool the inside surface of the capstan of the drawing apparatus which draws the material through the die or dies. A disadvantage of this known cooling system is that heat from the elongate material wound on the capstan has to be conducted through the capstan to the water.
The line contact of the drawn material with the capstan, the thickness of the wall of the capstan and the boundary layer of the water form resistances to heat flow and therefore the cooling system is not efficient.
It is also known to spray large quantities of water onto the drawn material downstream of the or each die but this method utilises large quantities of water, with the inherent disadvantage of having to handle large quantities of water. With the trough or tube method and the known spraying method the water which is used to effect cooling is only heated to a temperature below its evaporation point and it is necessary to wipe excess water from the drawn material before it enters the next die.
According to the present invention in one aspect, there is provided a method of cooling elongate material after it has been drawn through a die, comprising spraying liquid coolant onto the drawn elongate material in only sufficient quantity to enable all or substantially all of the applied liquid coolant to be evaporated and utilising the latent heat of evaporation of the liquid coolant to cool the elongate material.
The liquid coolant may be applied to the elongate material in the region between the die and the capstan or to the turns of elongate material wound on the capstan.
In the embodiment of the method the liquid coolant is applied to the lowermost turns of elongate material on the capstan and conveyed axially along the capstan with the turns.
The liquid coolant is preferably sprayed onto the elongate material from a plurality of atomiser spray nozzles or a duplex atomiser spray nozzle, each flow being separately controlled.
The liquid coolant is preferably water but it may comprise any suitable liquid.
According to the present invention in another aspect there is provided apparatus for cooling elongate material after it has been drawn through a die, comprising spray means located downstream of the die for spraying liquid coolant onto the elongate material and means for controlling the quantity of coolant sprayed by the spray means so that all or substantially all of the sprayed liquid coolant applied to the elongate material is evaporated and the latent heat of evaporation of the liquid coolant serves to cool the elongate material.
The spray means may be arranged to direct its spray onto the elongate material in the region between the die and the capstan or onto the turns of elongate material wound on the capstan.
Preferably the spray means comprises a plurality of atomiser spray nozzles or a duplex atomiser spray nozzle and control means for separately controlling the flow to each nozzle.
In one embodiment the apparatus includes a storage tank for liquid coolant, a pump for pumping liquid from the storage tank, a solenoid operated valve for controlling the flow of liquid from said pump to a manifold, a timer for controlling operation of said solenoid operated valve, a first atomiser spray nozzle for receiving liquid coolant from the manifold, a second atomiser spray nozzle, a second solenoid operated valve for controlling the flow of liquid from said manifold to said second spray nozzle and a second timer for controlling operation of said second solenoid operated valve.
With the method according to the present invention the elongate material is cooled by utilising the latent heat of evaportion of the liquid coolant and therefore all or substantially all of the liquid coolant applied to the elonagate material is removed by being evaporated and preferably there is no need to provide wiping means for wiping liquid coolant from the cooled elongate material.
The quantity of liquid coolant which is used is considerably less than that required with the known methods when only the sensible heat of the liquid is utilised to effect cooling.
Some embodiments of the invention will now be described, by way of examples, with reference to the accompanying drawings, in which: Figure 1 is a longitudinal section through a capstan of a wire-drawing apparatus provided with spray nozzles for spraying liquid coolant onto the turns of drawn wire wound on the capstan and constituting a first embodiment of the invention Figure 2 is a plan view of the spraying means shown in Figure 1.
Figure 3 is a longitudinal section through a wire-drawing apparatus provided with spray means between the die and the capstan and constituting a second embodiment of the invention; Figure 4 is a plan view taken in the direction of arrow 7 shown in Figure 3, and Figure 5 is a diagram of the control system for controlling the flow of liquid coolant to spray nozzles.
Figures 1 and 2 show an embodiment in which the drawn wire 42 is wound on a capstan 43 which comprises a drum 44 mounted on a drive shaft 45 supported in a bearing 46 carried by structure 47. Fixed to the structure 47 is a bracket 48 provided with two atomiser spray nozzles 49 and 50 which spray liquid coolant, such as water, onto the turns of wire 42 wound on the capstan 43.
The wire 42 is drawn onto the lower part of the drum 44 and moves up the drum. The spray nozzles 49 and 50 are protected from being damaged by any lashing wire by means of a housing 51. Liquid coolant under pressure is fed to the spray nozzles 49 and 50 by supply conduits 52. The liquid coolant which is sprayed onto the wire 42 is totally evaporated and the wire 42 is cooled by the latent heat of evaporation of the liquid coolant. Therefore the cooled wire 42 which leaves the capstan 43 is dry and preferably no wiping means are required.
Figures 3 and 4 show a wire-drawing apparatus which comprises a capstan 53, a die 54 which is mounted in a die-box 55 and a liquid coolant supply device 56. The device 56 consists of a box-like structure 57 open at its underside and having openings in opposed end walls through which wire 58 is drawn through the die 54 by the capstan 53 can pass.
The structure 57 is pivotably mounted by arms 59 to the die-box 55. Carried by the structure 57 are two atomiser spray nozzles 60 and 61 which spray liquid coolant, such as cold water, onto the drawn wire 58 in the region between the die 54 and the capstan 53. The structure 57 can be pivoted to the inoperative position shown in broken lines in Figure 3 for the purpose of facilitating stringing-up of the wire in the wire drawing apparatus. Located below the structure 57, when in the operative position, is a sump 62 provided with a drain conduit 63. The quantity of liquid coolant which is applied to the wire 58 by the spray nozzles 60, 61 is completely evaporated and the latent heat of evaporation of the liquid coolant is used to cool the wire.
In the embodiments utilising spray nozzles to spray liquid coolant onto the wire there may be two or more atomiser spray nozzles as described or a single duplex spray nozzle.
Figure 5 shows a suitable supply and control system for controlling the supply of liquid coolant supplied to the plurality of spray nozzles or a duplex spray nozzle. The system comprises a reservoir 64 for liquid coolant. Where the liquid coolant comprises cold water this may be taken from a pressurised supply source and the quantity contained in the reservoir 64 controlled by ball cock control 65. Connected to the reservoir 64 is a conduit 66 leading to the inlet of a pump 67 which supplies liquid coolant under pressure to a conduit 68. The pressure of the liquid coolant in the conduit 68 is regulated by a pressure relief valve 69 in parallel with the pump 67, the pressure being indicated on a pressure gauge 70. Provided in the conduit 68 is a solenoid operated control valve 71 which is controlled by a relay after a period of time determined by a timer 72. The period of time determined by the timer 72 can be adjusted to allow the wire sufficient time to be increased in temperature to that necessary to evaporate the liquid coolant applied thereto after the start button for the wire-drawing apparatus has been operated. The liquid coolant is then delivered at the regulated pressure to a main conduit or manifold 73 by way of a filter 74.
The pressurised liquid coolant is supplied by the manifold 73 to the atomiser spray nozzle 75 via conduit 76 and is applied to the wire in an atomised form at a predetermined volume. The conduit 76 also leads via a solenoid operated control valve 77 which is controlled by a timer 78 to a spray nozzle 79. After the solenoid operated valve 71 has been opened the solenoid operated valve 77 which is controlled by the timer 78 is opened for a variable period and closed for a variable period determined by the timer 78 so that the pressurised liquid coolant supplied by spray nozzle 79 is used to supplement the volume sprayed onto the wire by the nozzle 75.
It will be appreciated that a liquid coolant other than water can be used.
The cooling apparatus can be used alone or in conjunction with an indirect cooling system.
The cooling apparatus does not increase the length of the drawing machine and can be used with a variety of different sizes of capstan.
WHAT WE CLAIM IS: 1. A method of cooling elongate material after it has been drawn through a die, comprising spraying liquid coolant onto the drawn elongate material in only sufficient quantity to enable all or substantially all of the applied liquid coolant to be evaporated and utilising the latent heat of evaporation of the liquid coolant to cool the elongate material.
2. The method claimed in claim 1, in which the liquid coolant is applied to the elongate material in the region between the die and the capstan.
3. The method claimed in claim 1, in which the liquid coolant is applied to the elongate material whilst it is wound on a capstan.
4. The method claimed in claim 3, in which the liquid coolant is applied to the lowermost turns of the elongate material and is conveyed axially along the capstan with the turns.
5. The method claimed in any preceding claim, in which the liquid coolant is sprayed from a plurality of atomiser spray nozzles or a duplex atomiser spray nozzle, each flow being separately controlled.
6. The method claimed in any preceding claim, in which the liquid coolant is water.
7. Apparatus for cooling elongate material after it has been drawn through a die, comprising spray means located downstream of the die for spraying liquid coolant onto the elongate material and means for controlling the quantity of coolant sprayed by the spray means so that all or substantially all of the sprayed liquid coolant applied to the elongate material is evaporated and the latent heat of evaporation of the liquid coolant serves to cool the elongate material.
8. Apparatus as claimed in claim 7, in which the spray means is arranged to direct its spray onto the elongate material in the region between the die and the capstan.
9. Apparatus as claimed in claim 7, in which the spray means is arranged to direct its spray onto the turns of elongate material wound on the capstan.
10. Apparatus as claimed in claim 20, including a storage tank for liquid coolant, a pump for pumping liquid from the storage tank, a solenoid operated valve for controlling the flow of liquid from said pump to a manifold, a timer for controlling operation of said solenoid operated valve, a first atomiser spray nozzle for receiving liquid coolant from the manifold, a second atomiser spray nozzle, a second solenoid operated valve for controlling the flow of liquid from said manifold to said second spray nozzle and a second timer for controlling operation of said second solenoid operated valve.
12. A method of cooling elongate material after it has been drawn through a die, substantially as hereinbefore described with reference to the accompanying drawings.
13. Apparatus for cooling elongate material after it has been drawn through a die, substantially as hereinbefore described with reference to and as illustrated in any of the Figures of the accompanying drawings.
14. Wire-drawing apparatus provided with cooling apparatus as claimed in any one of claims 7 to 13.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (1)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    timer 72 can be adjusted to allow the wire sufficient time to be increased in temperature to that necessary to evaporate the liquid coolant applied thereto after the start button for the wire-drawing apparatus has been operated. The liquid coolant is then delivered at the regulated pressure to a main conduit or manifold 73 by way of a filter 74.
    The pressurised liquid coolant is supplied by the manifold 73 to the atomiser spray nozzle 75 via conduit 76 and is applied to the wire in an atomised form at a predetermined volume. The conduit 76 also leads via a solenoid operated control valve 77 which is controlled by a timer 78 to a spray nozzle 79. After the solenoid operated valve 71 has been opened the solenoid operated valve 77 which is controlled by the timer 78 is opened for a variable period and closed for a variable period determined by the timer 78 so that the pressurised liquid coolant supplied by spray nozzle 79 is used to supplement the volume sprayed onto the wire by the nozzle 75.
    It will be appreciated that a liquid coolant other than water can be used.
    The cooling apparatus can be used alone or in conjunction with an indirect cooling system.
    The cooling apparatus does not increase the length of the drawing machine and can be used with a variety of different sizes of capstan.
    WHAT WE CLAIM IS:
    1. A method of cooling elongate material after it has been drawn through a die, comprising spraying liquid coolant onto the drawn elongate material in only sufficient quantity to enable all or substantially all of the applied liquid coolant to be evaporated and utilising the latent heat of evaporation of the liquid coolant to cool the elongate material.
    2. The method claimed in claim 1, in which the liquid coolant is applied to the elongate material in the region between the die and the capstan.
    3. The method claimed in claim 1, in which the liquid coolant is applied to the elongate material whilst it is wound on a capstan.
    4. The method claimed in claim 3, in which the liquid coolant is applied to the lowermost turns of the elongate material and is conveyed axially along the capstan with the turns.
    5. The method claimed in any preceding claim, in which the liquid coolant is sprayed from a plurality of atomiser spray nozzles or a duplex atomiser spray nozzle, each flow being separately controlled.
    6. The method claimed in any preceding claim, in which the liquid coolant is water.
    7. Apparatus for cooling elongate material after it has been drawn through a die, comprising spray means located downstream of the die for spraying liquid coolant onto the elongate material and means for controlling the quantity of coolant sprayed by the spray means so that all or substantially all of the sprayed liquid coolant applied to the elongate material is evaporated and the latent heat of evaporation of the liquid coolant serves to cool the elongate material.
    8. Apparatus as claimed in claim 7, in which the spray means is arranged to direct its spray onto the elongate material in the region between the die and the capstan.
    9. Apparatus as claimed in claim 7, in which the spray means is arranged to direct its spray onto the turns of elongate material wound on the capstan.
    10. Apparatus as claimed in claim 20, including a storage tank for liquid coolant, a pump for pumping liquid from the storage tank, a solenoid operated valve for controlling the flow of liquid from said pump to a manifold, a timer for controlling operation of said solenoid operated valve, a first atomiser spray nozzle for receiving liquid coolant from the manifold, a second atomiser spray nozzle, a second solenoid operated valve for controlling the flow of liquid from said manifold to said second spray nozzle and a second timer for controlling operation of said second solenoid operated valve.
    12. A method of cooling elongate material after it has been drawn through a die, substantially as hereinbefore described with reference to the accompanying drawings.
    13. Apparatus for cooling elongate material after it has been drawn through a die, substantially as hereinbefore described with reference to and as illustrated in any of the Figures of the accompanying drawings.
    14. Wire-drawing apparatus provided with cooling apparatus as claimed in any one of claims 7 to 13.
GB157877A 1977-01-14 1977-01-14 Method and apparatus for cooling drawn wire Expired GB1576820A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB157877A GB1576820A (en) 1977-01-14 1977-01-14 Method and apparatus for cooling drawn wire
SE7800058A SE7800058L (en) 1977-01-14 1978-01-03 PROCEDURE AND DEVICE FOR COOLING DRAWN, ELEGANT
DE19782800730 DE2800730A1 (en) 1977-01-14 1978-01-09 METHOD AND DEVICE FOR COOLING DRAWN WIRE
US05/868,913 US4214470A (en) 1977-01-14 1978-01-12 Method and apparatus for cooling drawn wire
BE2056600A BE862875A (en) 1977-01-14 1978-01-13 METHOD AND DEVICE FOR COOLING THE STRETCHED WIRE
FR7800926A FR2377240A1 (en) 1977-01-14 1978-01-13 METHOD AND APPARATUS FOR COOLING A LONG-LENGTH BODY
IT7819243A IT1091812B (en) 1977-01-14 1978-01-13 METHOD AND EQUIPMENT FOR THE COOLING OF DRAWN WIRE
ES465934A ES465934A1 (en) 1977-01-14 1978-01-13 Method and apparatus for cooling drawn wire
JP322778A JPS5389859A (en) 1977-01-14 1978-01-14 Drawn wire cooling and said device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB157877A GB1576820A (en) 1977-01-14 1977-01-14 Method and apparatus for cooling drawn wire

Publications (1)

Publication Number Publication Date
GB1576820A true GB1576820A (en) 1980-10-15

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ID=9724392

Family Applications (1)

Application Number Title Priority Date Filing Date
GB157877A Expired GB1576820A (en) 1977-01-14 1977-01-14 Method and apparatus for cooling drawn wire

Country Status (2)

Country Link
BE (1) BE862875A (en)
GB (1) GB1576820A (en)

Also Published As

Publication number Publication date
BE862875A (en) 1978-05-02

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Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee