JP2024039166A - Contact wire manufacturing method and contact wire manufacturing device - Google Patents

Abstract

[Problem] To provide a method and device for manufacturing a trolley wire capable of producing a high-strength trolley wire. [Solution] In manufacturing a trolley wire 100 made of a copper base material containing 0.25% by weight or more of tin, a wire 10 is drawn and grooved by a plurality of dies 31 while being transferred by a plurality of capstans 32. The wire drawing and groove processing are continuously performed while cooling is performed by a first cooling mechanism 6 that sprays cooling water 60 inside the capstan 32, a second cooling mechanism 7 that cools the dies 31 by immersing or applying wire drawing oil 70, and a third cooling mechanism 8 that applies water-based lubricant 80 to the wire 10 and accumulates the water-based lubricant 80 in a capstan cover 81, thereby immersing the wire 10 in the water-based lubricant 80. [Selected Figure] Figure 2

Description

The present invention relates to a contact wire manufacturing method and a contact wire manufacturing apparatus.

Conventionally, copper and copper alloys have been mainly used for overhead contact wires (trolley wires) that supply power to trains via pantographs and the like. General copper wire is produced by cold drawing copper wire with a diameter of 8 mm or more through a wire drawing die, but contact wire is manufactured by cold drawing copper wire with a diameter of 20 mm or more. be done. Since the strength of contact wires is directly related to their service life, there is a strong demand for lower costs and higher strength. Therefore, various efforts are being made by each manufacturer.

For example, there are manufacturers who manufacture contact wires that have reduced costs by limiting the alloying elements added to the copper base material to just one type of inexpensive solid solution strengthening element, and manufacturers who manufacture contact wires that have reduced costs by limiting the alloying elements added to the copper base material to just one type of solid solution strengthening element. There is a manufacturer that manufactures high-performance contact wires with tensile strength exceeding 500 MPa by adding multiple types and performing heat treatment. As shown in Patent Documents 1 and 2, the present applicant has achieved high strength and low cost by adding tin and indium, which are solid solution strengthening elements, to the copper base material and devising a manufacturing method for copper rough drawn wire. We provide contact wires.

In the case of general contact wire, the wire drawing equipment is a single-head wire drawing machine that places only one die on the wire drawing line and repeats drawing and rewinding, and a single-head wire drawing machine that places multiple dies on the wire drawing line. Continuous wire drawing machines are mainly used. As a contact wire manufacturing method using a continuous wire drawing machine, a method is known in which wire drawing is performed three times and grooved processing is performed once, as shown in Patent Document 3, for example.

When contact wires are continuously drawn, the processing heat generated during processing can cause a decrease in strength, so cooling during the processing process is important, especially when manufacturing contact wires that require high strength. It is. In typical copper wire processing equipment, dies, capstans, and copper wires are cooled by applying or immersing them in processing oil at room temperature. Regarding the immersion cooling and wire drawing processing of common copper wires in processing oil, for example, the method disclosed in Patent Document 4 is known.

Japanese Patent Application Publication No. 2004-137551 Japanese Patent Application Publication No. 2007-56370 Japanese Patent Application Publication No. 2010-201478 Japanese Patent Application Publication No. 2008-290121

However, since the contact wire has a large wire diameter, the processing heat generated during the wire drawing process is high, and the processing heat generated cannot be completely reduced with room temperature processing oil, which may cause a decrease in strength. Moreover, since the same wire drawing oil is used repeatedly in one wire drawing process, the temperature of the wire drawing oil increases, and there is a possibility that the reduction of processing heat becomes more incomplete. Furthermore, the processing oil used for contact wires has a high viscosity due to the wire drawing load, making it unsuitable for cooling.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method and apparatus for manufacturing a contact wire that can manufacture a high-strength contact wire while suppressing costs.

In order to solve the above-mentioned problems, the present invention provides a method for manufacturing a contact wire made of a copper base material containing 0.25% by weight or more of tin, in which a contact wire is transferred by a plurality of transfer devices, A first cooling mechanism includes a processing step of performing wire drawing and grooving using a die, and a first cooling mechanism that sprays cooling water into the inside of the transfer device, and a second cooling mechanism that cools the die by dipping or coating with wire drawing oil. and a third cooling mechanism that immerses the wire in the water-based lubricant by applying a water-based lubricant to the wire and storing the water-based lubricant in a cover that accommodates the transfer device, Provided is a method for manufacturing a contact wire, in which the wire drawing process and the groove forming process are performed continuously while cooling.

Further, in order to solve the above-mentioned problems, the present invention provides a supply device that supplies a wire made of a copper base material containing 0.25% by weight or more of tin, a plurality of transfer devices that transfer the wire, a plurality of dies for drawing and grooving the wire; a first cooling mechanism for spraying cooling water into the transfer device; and cooling the dies by immersion or coating with wire drawing oil. a second cooling mechanism; and a third cooling mechanism that immerses the wire in the water-based lubricant by applying a water-based lubricant to the wire and storing the water-based lubricant in a cover that accommodates the transfer device. Provided is a contact wire manufacturing device equipped with the following.

According to the method and apparatus for manufacturing a contact wire according to the present invention, it is possible to manufacture a high-strength contact wire while keeping costs down.

It is a flowchart which shows an example of the process of the manufacturing method of the contact wire based on embodiment of this invention. 1 is a schematic diagram showing a configuration example of a contact wire manufacturing apparatus according to the present embodiment. (a) to (f) are cross-sectional views of the rough drawn wire, the drawn wire material, the stripping material, the first grooved material, the second grooved material, and the contact wire. FIG. 3 is a cross-sectional view showing an example of a first cooling mechanism. FIG. 3 is a sectional view showing an example of a second cooling mechanism. FIG. 7 is a sectional view showing an example of a third cooling mechanism.

[Embodiment]
FIG. 1 is a flowchart showing an example of a method for manufacturing a contact wire 100 according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing a configuration example of a manufacturing apparatus 1 for contact wire 100 according to the present embodiment. 3(a) to (f) are cross-sectional views of the rough drawn wire 11, the drawn wire material 12, the stripping material 13, the first grooved material 14, the second grooved material 15, and the completed contact wire 100. . 4 to 6 are cross-sectional views showing the configurations of the first to third cooling mechanisms 6 to 8 that the manufacturing apparatus 1 has.

As shown in FIG. 3(f), the contact wire 100 includes a pair of suspension grooves 101 for connecting the contact wire 100, and a detection groove for detecting that the amount of wear of the contact wire 100 has reached a predetermined value. A pair of holding grooves 102 for holding the optical fiber 90 as a wire are formed to extend in the longitudinal direction over the entire length of the contact wire 100. The contact wire 100 is suspended on the track of a railway vehicle by a metal fitting having claws that sandwich a pair of suspension grooves 101 . When the optical fiber 90 is broken, it is detected that the amount of wear on the contact wire 100 has reached a predetermined value.

The rough drawn wire 11, the drawn wire material 12, the stripping material 13, the first grooved material 14, and the second grooved material 15 are linear bodies of the contact wire 100 that are being processed. In the following description, the rough drawn wire 11, the drawn wire material 12, the stripping material 13, the first grooved material 14, and the second grooved material 15 are collectively referred to as the wire rod 10. The first grooved material 14 and the second grooved material 15 have suspension processing grooves 141 and 151 which become the suspension groove 101 of the contact wire 100, and holding grooves 142 and 152 which become the holding groove 102 of the contact wire 100, respectively. It is formed.

As shown in FIG. 1, the method for manufacturing the contact wire 100 according to the present embodiment includes a wire drawing step (F1) in which a drawn wire 11 is drawn into a circular shape to produce a drawn wire material 12; A peeling process (F2) in which a peeling process is performed to remove the copper oxide layer 121 on the surface of the peeling material 13 to produce a peeling material 13, and a groove processing is performed on the peeling material 13 to form a first grooved material 14 and a second grooved material. 15, a finishing process (F4) in which the second grooved material 15 is finished to give it the final shape as the contact wire 100, and the contact wire 100 is placed in a wire storage machine. It has a winding step (F5) of winding it up into four parts.

In this embodiment, a pair of suspension grooves 101 and a holding groove 102 are formed by grooving the wire 10 twice. The first grooved material 14 is a linear body that has been subjected to the first grooving process, and the second grooved material 15 is a linear body that has been subjected to the second grooving process. be. The finishing process in the finishing step (F4) includes a process of closing the pair of holding grooves 152 after each of the optical fibers 90 is accommodated in the pair of holding grooves 152 of the second grooved material 15.

The wire drawing process (F1), the stripping process (F2), the grooving process (F3), the finishing process (F4), and the winding process (F5) are performed continuously, that is, after the rough wire 11 is let out, the contact wire 100 is The process is performed as a series of processes without stopping the flow of the wire rod 10 and contact wire 100 at each stage until they are wound into the wire storage machine 4. Thereafter, the contact wire 100 is re-wound from the wire storage machine 4 onto the winding drum 51 and shipped.

As shown in FIG. 2, the manufacturing apparatus 1 includes a wire drawing machine 2 that feeds out a wire wire 11 wound into a coil, and first to fifth processing machines 3A to 3E (when these are collectively referred to as the following) ), a wire storage machine 4 that stores the contact wire 100 produced by the first to fifth processing machines 3A to 3E, and a wire storage machine 4 that stores the contact wire 100 that is fed out from the wire storage machine 4. It is provided with a drum winding machine 5 that winds the winding around a winding drum 51. The rough drawing wire feeder 2 is an example of a feeding device of the present invention. The wire storage machine 4 is an example of a winding device of the present invention.

Furthermore, the manufacturing apparatus 1 connects each of the first to third cooling mechanisms 6 to 8 shown in FIGS. 4 to 6 to at least one of the first to fifth processing machines 3A to 3E. have. The first to third cooling mechanisms 6 to 8 are configured to ensure that the pre-processing temperature of the wire rod 10 is 30°C or lower immediately before performing each of wire drawing, stripping, grooving, and finishing. Cooling is performed so that the post-processing temperature of the wire rod 10 immediately after processing is 100° C. or less.

The rough drawing wire feeding machine 2 feeds out the rough drawing wire 11 produced by casting and hot rolling a molten metal of pure copper or copper alloy from a coil 21 at a constant speed. The rough wire 11 is made of a copper base material containing 0.25% by weight or more of tin. Note that, in addition to tin, other additive elements (for example, indium) may be included as additive elements added to the copper base material. In this case, the content of the additive element may be, for example, 0.15% by weight or more and 0.8% by weight or less, including tin and other additive elements.

The first to fifth processing machines 3A to 3E each have dies 31A to 31E (hereinafter collectively referred to as "dies 31") that shape the wire 10, and transport the wire 10 to a subsequent process. It has first to fifth capstans 32A to 32E (hereinafter also collectively referred to as "capstans 32"). The first to fifth capstans 32A to 32E are arranged adjacent to each other downstream of the dies 31A to 31E in the traveling direction of the wire 10. The rough drawn wire 11 is shaped by successively passing through dies 31A to 31E of the first to fifth processing machines 3A to 3E, and its cross-sectional shape and size gradually become closer to the contact wire 100. Capstan 32 is an example of a transfer device of the present invention.

The manufacturing apparatus 1 uses a round-hole wire drawing die as the die 31A of the first processing machine 3A to perform wire drawing on the rough drawn wire 11 to produce a drawn wire material 12, and then uses the die 31B of the second processing machine 3B to draw the rough wire 11. The surface of the drawn wire material 12 is stripped using a stripping die to create a stripping material 13, and grooved dies with irregularly shaped holes are used as the dies 31C and 31D of the third processing machine 3C and the fourth processing machine 3D. The second grooved material 15 is created by grooving in two steps, and the final shape of the contact wire 100 is created using a finishing die as the die 31E of the fifth processing machine 3E. Here, the second processing machine 3B that performs the peeling process is an example of the peeling apparatus of the present invention. The optical fiber 90 is supplied from the detection line sending device 9 to the fifth processing machine 3E.

The manufacturing apparatus 1 includes a rough wire drawing machine 2, a die 31A (wire drawing die), a first capstan 32A, a die 31B ( (peeling die), second capstan 32B, die 31C (unusual hole die), third capstan 32C, die 31D (unusual hole die), fourth capstan 32D, die 31E (finishing die), fifth The capstan 32E and the wire storage machine 4 are arranged in series. Furthermore, the manufacturing apparatus 1 includes a linear velocity control section that controls the rotational speed of each of the plurality of capstans 32 so that the linear velocity of the wire rod 10 in the first to fifth processing machines 3A to 3E is constant. There is. Each capstan 32 applies a predetermined tension to the wire 10 and transfers it.

The wire storage machine 4 has a cylindrical winding body 41, and continuously winds the contact wire 100 produced by the first to fifth processing machines 3A to 3E from the starting end to the terminal end. Wind it up to 41. The drum winding machine 5 does not operate until the wire storage machine 4 winds up the terminal end of the contact wire 100, and after the wire storage machine 4 winds up the terminal end of the contact wire 100, the drum winder 5 unwinds it from the wire storage machine 4. The contact wire 100 is wound onto a winding drum 51.

FIG. 4 is a sectional view showing an example of the first cooling mechanism 6 for cooling the capstan 32. This first cooling mechanism 6 is provided in at least one of the processing machines 3 among the first to fifth processing machines 3A to 3E. The capstan 32 becomes high temperature because heat is transferred from the shaped wire rod 10. Therefore, the first cooling mechanism 6 cools the inside of the capstan 32 during at least one of the wire drawing process (F1), the peeling process (F2), the grooving process (F3), or the finishing process (F4). Cooling water 60 is sprayed to suppress the temperature rise of the capstan 32.

The first cooling mechanism 6 includes a rotary joint 61 partially disposed inside the capstan 32, a cooling water tank 62 that stores cooling water 60, and a cooling water tank 62 that lowers the temperature of the cooling water 60. and a pump 64 that transports the cooling water 60 in the cooling water tank 62 into the rotary joint 61 and sprays the cooling water 60 into the capstan 32. Note that in FIG. 4, 62a, 62b, 63a, and 63b are pipes that transport the cooling water 60.

The rotary joint 61 has a pipe 611 provided to penetrate inside. Pump 64 transports cooling water 60 into capstan 32 via pipe 611 and sprays it. The cooling water 60 sprayed inside the capstan 32 cools the capstan 32. Further, the cooling water 60 sprayed inside the capstan 32 flows inside the capstan 32, passes through the inside of the rotary joint 61 again from the inside of the capstan 32, and is collected into the cooling water tank 62. The cooling water device 63 sucks and cools the cooling water from the cooling water tank 62 and returns the cooled water 60 to the cooling water tank 62.

FIG. 5 is a sectional view showing an example of the second cooling mechanism 7 for cooling the dice 31. This second cooling mechanism 7 is provided in at least one of the processing machines 3 among the first to fifth processing machines 3A to 3E. The temperature of the die 31 increases due to processing heat generated when shaping the wire rod 10. Further, in order to shape the wire rod 10 with a small load, it is necessary to supply wire drawing oil to the die 31. Therefore, the second cooling mechanism 7 uses the wire drawing oil 70 in at least one of the wire drawing process (F1), the stripping process (F2), the grooving process (F3), or the finishing process (F4). The die 31 is cooled by dipping or coating, thereby suppressing the rise in temperature of the die 31.

The second cooling mechanism 7 has a die box 71 that accommodates a guide die 711 that guides the wire 10, a first die holder 712 that holds the guide die 711, and a second die holder 713 that holds the die 31. . The die box 71 is filled with wire drawing oil 70 to the extent that at least a portion of the guide die 711, first die holder 712, die 31, and second die holder 713 are immersed therein.

The second cooling mechanism 7 includes an oil tank 72 that collects wire drawing oil 70 in the die box 71, and an oil filter 73 that is disposed on a pipe 72a on the supply side of the oil tank 72 and that collects copper powder and the like during processing. , a pump 74 , a heat exchanger 75 , a cooling water device 76 , and an oil supply nozzle 77 that supplies wire drawing oil 70 into the die box 71 . The pump 74 pumps the wire drawing oil 70 that has passed through the oil filter 73 to the heat exchanger 75. The cooling water device 76 supplies cooling water for cooling the wire drawing oil 70 to the heat exchanger 75. The heat exchanger 75 exchanges heat between the wire drawing oil 70 and the cooling water from the cooling water device 76. In addition, in FIG. 4, 72a, 72b, and 75a are pipes for transporting the wire drawing oil 70. 76a and 76b are pipes that transport cooling water between the heat exchanger 75 and the cooling water device 76.

The wire drawing oil 70 sucked into the pump 74 from the oil tank 72 and discharged from the pump 74 is cooled down through the heat exchanger 75 and then supplied from the oil supply nozzle 77 to the die box 71 to cool the die 31. Note that instead of the oil supply nozzle 77, the wire drawing oil 70 may be applied to the die 31 using a brush or a brush.

FIG. 6 is a cross-sectional view showing an example of the third cooling mechanism 8 that performs direct cooling in the capstan 32 and emulsion immersion cooling. This third cooling mechanism 8 is provided in at least one of the processing machines 3 among the first to fifth processing machines 3A to 3E. The third cooling mechanism 8 applies an emulsion 80 to the wire rod 10 in at least one of the wire drawing process (F1), the stripping process (F2), the grooving process (F3), or the finishing process (F4). Thereafter, the emulsion 80 is stored in the capstan cover 81 to immerse the wire 10 in the emulsion 80. That is, in order to further cool the wire 10 whose processing heat has been alleviated by applying the emulsion 80, the emulsion 80 applied to the wire 10 from the emulsion nozzle 82 is collected and the wire 10 is immersed. Here, the emulsion 80 is an example of a water-based lubricant.

The third cooling mechanism 8 includes a capstan cover 81 that accommodates the capstan 32, an emulsion nozzle 82 that applies the emulsion 80 to the wire rod 10, an emulsion tank 83 that accommodates the emulsion 80, and an emulsion 80 in the emulsion tank 83. The heat exchanger 85 includes a pump 84 for pumping water, a heat exchanger 85, and a cooling water device 86 for supplying cooling water to the heat exchanger 85. Heat exchanger 85 performs heat exchange between emulsion 80 and cooling water from cooling water device 86 . In addition, in FIG. 5, 83a, 83b, and 85a are pipes for transporting the emulsion 80. 86a and 86b are pipes that transport cooling water between the heat exchanger 85 and the cooling water device 86.

The emulsion 80 applied to the wire rod 10 is collected in a capstan cover 81 to a depth of about 20 cm, and the wire rod 10 is immersed in the emulsion 80 for further cooling. The emulsion 80 stored in the capstan cover 81 is collected in an emulsion tank 83. After the temperature of the collected emulsion 80 is lowered by the heat exchanger 85, it is again applied to the wire 10 by the emulsion nozzle 82. Note that the emulsion 80 applied to the wire 10 is blown away by a blower. Thereby, the emulsion 80 can be prevented from being mixed into the wire drawing oil 70.

(Modified example)
In addition, in the above-mentioned embodiment, the wire drawing process was performed in one time, but the wire drawing process may be performed in multiple times. Further, in the above embodiment, the groove forming process is performed in two steps, but the groove forming process may be performed once or three times or more. Furthermore, in the first cooling mechanism 6, an emulsion may be used instead of the cooling water 60, and the emulsion may be collected in an emulsion tank. Further, in the first cooling mechanism 6, other coolant such as gas may be used instead of the cooling water 60.

(Example)
In order to verify the strength increasing effect of this embodiment, we tested a single-head wire drawing machine, a continuous wire drawing machine without cooling reinforcement, and a continuous wire drawing machine with cooling reinforcement corresponding to the above embodiment. The tensile strength of the contact wire was investigated. The target contact wire (sample) was a contact wire with a cross-sectional area ^of 110 mm2 containing 0.3% tin (Cu-Sn contact wire 110SQ), 0.3% tin by weight, and 0.1% indium by weight. (Cu-Sn-In type contact wire 110SQ) with a cross-sectional area of 110 mm ² and a contact wire with a cross-sectional area of 170 mm ² doped with 0.3% by weight of tin and 0.1% by weight of indium (Cu-Sn -In-based contact wire 170SQ) was used. The tensile strength and elongation of the contact wire were measured in accordance with JIS C3002 (Test method for electrical copper wire and aluminum wire). Table 1 shows the tensile load, tensile strength, and elongation of the contact wire at this time. Tensile strength is the tensile load divided by the nominal cross-sectional area.

As shown in Table 1, the single-head wire drawing machine and the continuous wire drawing machine without cooling reinforcement have approximately the same tensile load and tensile strength of the contact wire, and depending on the product, the continuous wire drawing machine without cooling strength is better. It can be seen that the tensile load and tensile strength of the contact wire become lower. On the other hand, in a continuous wire drawing machine with cooling reinforcement, the tensile strength increases by about 3 to 4% compared to a single-head wire drawing machine, and by about 6 to 7% compared to a continuous wire drawing machine without cooling reinforcement. However, it can be seen that a tensile strength of 430 MPa or more was achieved. Therefore, it can be seen that the strength of the contact wire can be increased by strengthening the cooling according to the embodiment described above. In addition, with general metal materials, elongation decreases as tensile strength increases, but the elongation of the contact wire manufactured in this example maintains the same elongation even when compared with a single-head wire drawing machine. I can see that

(Effects of embodiment)
As explained above, according to the present embodiment, the wire rod 10 can be supplied to each die 31 in a sufficiently cooled state during shape processing of the wire rod 10, and the temperature of the wire rod 10 during and after processing can be kept low. This makes it possible to manufacture a high-strength contact wire 100. Further, since the strength of the contact wire 100 and the life of the contact wire 100 are in a proportional relationship, by increasing the strength of the contact wire 100, it is possible to extend the life of the contact wire 100 while suppressing costs.

(Summary of embodiments)
Next, technical ideas understood from the embodiments described above will be described using reference numerals and the like in the embodiments. However, each reference numeral in the following description does not limit the constituent elements in the scope of the claims to those specifically shown in the embodiments.

[1] A method for manufacturing a contact wire (100) made of a copper base material containing 0.25% by weight or more of tin, in which the wire (10) is transferred by a plurality of transfer devices (capstans 32) and A first cooling mechanism (6) that has a processing step of performing wire drawing and grooving using a die (31) and sprays cooling water (60) into the inside of the transfer device (32), and a wire drawing oil ( a second cooling mechanism (7) that cools the die by dipping or coating with a water-based lubricant (70); and a second cooling mechanism (7) that cools the die by dipping or coating the die with A third cooling mechanism (8) immerses the wire rod (10) in the water-based lubricant (80) by storing it in a cover (capstan cover 81) that accommodates the transfer device (32), while cooling the wire rod (10). A method for manufacturing a contact wire, in which the wire drawing process and the groove forming process are performed continuously.

[2] The pre-processing temperature of the wire rod (10) before performing the wire drawing process and the groove forming process is 30° C. or less, and the wire rod (10) after performing the wire drawing process and the groove process. ) The method for manufacturing a contact wire according to [1] above, wherein the cooling is performed so that the temperature after processing is 100° C. or less.

[3] The grooving process according to the above [1] is a process of forming grooves (141, 142, 151, 152) in the wire (10) using irregular hole dies (31C, 31D). Method of manufacturing contact wire.

[4] The processing step further includes a stripping process of stripping the surface of the wire (10), and in the processing step, while cooling by the first to third cooling mechanisms (6 to 8), The method for manufacturing a contact wire according to [1] above, wherein the wire drawing process, the peeling process, and the grooving process are performed continuously.

[5] The method for producing a contact wire according to any one of [1] to [4] above, wherein the contact wire (100) processed in the processing step has a tensile strength of 430 MPa or more.

[6] A supply device (rough wire feeder 2) that supplies the wire rod (10) made of a copper base material containing 0.25% by weight or more of tin, and a plurality of transfer devices (32) that transfer the wire rod (10). ), a plurality of dies (31) for drawing and grooving the wire (10), and a first cooling mechanism (6) for spraying cooling water (60) into the inside of the transfer device (32). ), a second cooling mechanism (7) for cooling the die (31) by dipping or coating with wire drawing oil (70), and applying a water-based lubricant (80) to the wire (10); a third cooling mechanism (8) that immerses the wire (10) in the water-based lubricant (80) by storing the water-based lubricant (80) in a cover (81) that accommodates the transfer device (32); A contact wire manufacturing apparatus (1) comprising:

[7] The contact wire manufacturing apparatus according to [6] above, further comprising a peeling device (second processing machine 3B) for peeling the surface of the wire rod (10) subjected to the wire drawing process ( 1).

Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. Furthermore, it should be noted that not all combinations of features described in the embodiments are essential for solving the problems of the invention.

1... Manufacturing equipment 10... Wire rod 100... Contact wire 2... Rough wire feeding machine (feeding device)
3... Processing machine 31, 31A-31E... Dice 32... Capstan (transfer device) 32A-32E... First to fifth capstan 3A-3E... First to fifth processing machine 6... First cooling mechanism 60...Cooling water 7...Second cooling mechanism 70...Wire drawing oil 8...Third cooling mechanism 80...Emulsion (water-based lubricant) 81...Capstan cover (cover)

Claims (7)

A method for producing a contact wire made of a copper base material containing 0.25% by weight or more of tin, the method comprising:
It has a processing step in which the wire is drawn and grooved using a plurality of dies while being transferred by a plurality of transfer devices,
a first cooling mechanism that sprays cooling water into the inside of the transfer device; a second cooling mechanism that cools the die by dipping or coating it with wire drawing oil; and a second cooling mechanism that cools the die by dipping or coating it with wire drawing oil; A third cooling mechanism that immerses the wire rod in the water-based lubricant by storing the water-based lubricant in a cover that accommodates the transfer device allows the wire drawing process and the groove forming process to be performed continuously while cooling. conduct,
Method of manufacturing contact wire. The pre-processing temperature of the wire rod before the wire drawing process and the grooving process is 30°C or lower, and the post-processing temperature of the wire rod after the wire drawing process and the grooving process is 100°C or lower. performing the cooling so that
A method for manufacturing a contact wire according to claim 1. The grooving process is a process of forming grooves in the wire using a irregular hole die.
A method for manufacturing a contact wire according to claim 1. The processing step further includes a peeling process of peeling the surface of the wire,
In the processing step, the wire drawing process, the peeling process, and the grooving process are performed continuously while cooling by the first to third cooling mechanisms,
A method for manufacturing a contact wire according to claim 1. The tensile strength of the contact wire processed in the processing step is 430 MPa or more,
A method for manufacturing a contact wire according to any one of claims 1 to 4. A supply device that supplies a wire made of a copper base material containing 0.25% by weight or more of tin;
a plurality of transfer devices that transfer the wire;
a plurality of dies for drawing and grooving the wire;
a first cooling mechanism that sprays cooling water inside the transfer device;
a second cooling mechanism that cools the die by dipping or coating with wire drawing oil;
a third cooling mechanism that immerses the wire in the water-based lubricant by applying a water-based lubricant to the wire and storing the water-based lubricant in a cover that accommodates the transfer device;
Contact wire manufacturing equipment equipped with further comprising a peeling device that peels off the surface of the wire that has been subjected to the wire drawing process,
The contact wire manufacturing apparatus according to claim 6.

Images