CN115415347B - Contact line forming device, system and method - Google Patents

Contact line forming device, system and method Download PDF

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Publication number
CN115415347B
CN115415347B CN202211279089.0A CN202211279089A CN115415347B CN 115415347 B CN115415347 B CN 115415347B CN 202211279089 A CN202211279089 A CN 202211279089A CN 115415347 B CN115415347 B CN 115415347B
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China
Prior art keywords
roller
contact
rollers
forming device
contact line
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CN202211279089.0A
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Chinese (zh)
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CN115415347A (en
Inventor
王风德
赵国帅
武同伟
林才
王肇飞
赵景山
王龙肖
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Yantai Wanlong Vacuum Metallurgy Co ltd
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Yantai Wanlong Vacuum Metallurgy Co ltd
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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
    • 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
    • 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
    • B21C1/003—Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
    • 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
    • B21C19/00—Devices for straightening wire or like work combined with or specially adapted for use in connection with drawing or winding machines or apparatus
    • 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
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • 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
    • 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
    • B21C47/16—Unwinding or uncoiling
    • 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
    • B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B60M1/28—Manufacturing or repairing trolley lines

Abstract

The invention discloses a contact wire forming device, a contact wire forming system and a contact wire forming method, wherein the contact wire forming device comprises a die holder and a roller drawing die set, and the roller drawing die set is arranged on the die holder through a rotating mechanism; the roller drawing die set comprises a frame and a roller drawing die set arranged in the frame, wherein the roller drawing die set comprises at least 3 rollers, the rollers are rotatably arranged on roller brackets, the roller brackets are arranged in the frame through guide rails, and an adjusting mechanism is arranged and used for adjusting the roller brackets to move along the guide rails and be locked at a set position; the roll surfaces of the plurality of rolls are enclosed to form the cross section shape of the contact line to be processed, and the forming system and the forming method are implemented by using the forming device. The invention solves the problem of twisting in the processing process of the long special-shaped wire rod, solves the problem that the traditional fixed drawing die cannot be adjusted according to the wire rod condition in the processing process, greatly prolongs the service life of the die, improves the product quality and reduces the production cost.

Description

Contact line forming device, system and method
Technical Field
The invention relates to the technical field of railway contact net wire manufacturing, in particular to a contact wire forming device system and a contact wire forming method.
Background
In the process of train high-speed operation, a power supply is required to be transmitted to the train through sliding friction between a contact wire above the contact wire and a pantograph, and the operation safety of an electric locomotive is directly affected by the performance of the contact wire, so that the contact wire is called as a 'life line' of a high-speed railway.
Along with the high-speed development of electrified railways and the continuous improvement of train running speed, the requirements on the strength and the electric conductivity of the contact wires are higher and higher, the high strength can increase the safety and the stability of train running, and the high electric conductivity can reduce the loss of electric energy in the transmission process.
The materials used at present mainly comprise copper-silver alloy, copper-tin alloy, copper-magnesium alloy, copper-chromium-zirconium alloy and the like. The copper-chromium-zirconium alloy is used as a copper alloy contact line material with high strength, high conductivity and high softening temperature, and is the optimal choice for manufacturing the contact line at present. The aging strengthening copper-chromium-zirconium alloy utilizes aging strengthening to separate out nano-scale particles to improve the strength of the material, and the material has a matching relation between the outstanding strength and the conductivity, but the alloy has the problems of large deformation resistance, difficult production control, high cost, unstable mass production quality and the like in the deformation processing process. In practical application, the length of the contact line is basically more than 1000 meters, the longer the contact line is, the longer the length of a single wire is, the wire is not allowed to have defects on the whole length dimension, including internal defects, surface scratches, burrs, large knocks and the like, and special people can be arranged to carry out whole-course inspection on the wire in the practical paying-off process. In the prior art, it is difficult to ensure that the full-range surface quality of the contact line is good, because the overheating of the grinding tool caused by friction in the drawing process can lead to adhesion of the wire rod and the die, the lubrication effect is reduced, raw material accumulation can occur, the raw material accumulation can block the die hole, even the wire rod is likely to be broken, or the hard raw material is pressed into the surface of the wire rod, flaws of the surface quality of the wire rod are formed, and the wire rod is scrapped. If the contact line of 950 m is produced, the surface quality problem is caused by the failure of the drawing die when 900 m is successfully drawn, the whole line is scrapped, the previous work is wasted, and the yield is greatly reduced.
In addition, because the raw material wire may have conditions such as bending before entering the die, the internal stress in the bending part and the internal stress out of the bending part are different, and in the traditional drawing process by using the drawing die, the drawing die is fixed, so that the local stress of the wire is difficult to adjust unevenly, which tends to cause that the stress on one side of the wire is large, the stress on one side of the wire is small, and the surface quality problems such as burrs, folding and copper sheets are possibly caused on the surface of the wire on the side of the wire.
In addition, the wire is drawn by a drawing disc, the principle of the wire is that the wire is wound on a winding drum, the driving mechanism drives the winding drum to rotate, the traction force on the wire is formed by the friction force between the wire and the winding drum, the wire needs to be wound on the winding drum for a plurality of circles in order to provide enough traction force (friction force), the wire wound on the winding drum is not necessarily in an overlapped state but is arranged next to the winding drum, namely, the wire itself is necessarily required to generate certain inclined rotation, and certain torsion is carried on the wire when the wire enters a drawing die, so that the whole wire can be rotated and twisted after passing through the drawing die. If the cross section of the wire to be processed is a perfect circle, the problem is not a problem, because the round appearance is a circle anyway, but on a structure that the cross section of the wire is a special shape, the problem is that the wire must be strictly treated, because the contact wire must keep the straight up state of the marking line and the straight down state of the working surface in daily use, the wire must not rotate, if the wire does not uniformly keep the straight up state in the whole length direction, but has a torsion angle, the wire paying-off process is not smooth if the wire is slightly caused, the special-shaped groove is seriously caused to rotate by an angle, the wire cannot be installed, and even the product cannot be directly used.
Therefore, it is important to develop a forming method of the contact wire which is time-saving, labor-saving and can meet the surface quality requirement of the contact wire.
Disclosure of Invention
The invention provides a molding method of a large antenna, which aims to solve the problems of the fixed mould drawing technology, and the specific technical scheme is as follows:
the contact wire forming device is characterized by comprising a die holder and a roller drawing die set, wherein the roller drawing die set is arranged on the die holder through a rotating mechanism;
the rotating mechanism is used for enabling the roller drawing module to rotate around the axis of the contact line to be processed and be locked at a set angle;
the roller drawing die comprises a frame and a roller drawing die arranged in the frame, wherein the frame is provided with a feeding guide hole and a discharging guide hole, the roller drawing die comprises at least 3 rollers, the rollers are rotatably arranged on roller brackets, the roller brackets are arranged in the frame through guide rails, and an adjusting mechanism is arranged in the frame and used for adjusting the roller brackets to move along the guide rails and be locked at a set position; the roller surfaces of the rollers are enclosed to form the cross-sectional shape of the contact line to be processed.
Compared with the prior art, the scheme has the following beneficial effects:
firstly, when in actual use, a plurality of groups of contact line forming devices are arranged, and final contact lines are obtained through multi-pass processing, and because the roller drawing modules of the equipment are rotatably arranged on the die holder, during production, the roller drawing modules in the adjacent contact line forming devices are set to different rotation angles, so that the wire rod is subjected to roller drawing deformation through the contact line forming devices, the straightening process is realized, the torsion stress in the wire rod is eliminated, namely, after the raw material wire rod sequentially passes through a plurality of roller drawing modules with slightly different rotation angles, the extrusion deformation is finished, the required special-shaped cross section is obtained, and meanwhile, the straightening work of the wire rod is synchronously realized, so that the finished wire rod cannot be subjected to stress torsion in the deformation process, and the torsion problem in the processing process of the large-length special-shaped drawing contact line is solved. In other words, the method is equivalent to dispersing the straightening process of the product into each process step of the whole roll forming, and is not used for correcting the distortion of the wire rod independently after forming like the traditional process, and if the distortion of the final finished product is particularly severe in the traditional process, the final finished product cannot be repaired by the subsequent remedial measures, so that the whole wire rod is scrapped, and the yield is reduced.
Secondly, each roller in the device can be independently adjusted, and the pressing force and the position of each roller can be adjusted according to the actual condition of the wire, so that the stress and the deformation of the wire are influenced, and the quality of the wire is ensured. If a certain coil of raw material wire is threaded to a roll drawing module, if the wire is integrally bent (although the wire is generally deformed after being straightened, the straightness after being straightened is not necessarily perfect), the traditional fixed drawing die cannot be adjusted and can only continue production if the wire is bent, and in the production process, for example, the stress of the bent part of the wire is smaller, the stress of the bent part of the wire is larger, and the fixed drawing die cannot be adjusted adaptively, so that the bent position of the wire is likely to apply excessive force, and further surface quality problems such as burrs, peeling and the like are caused; by adopting the device, if similar bent wires are encountered, the position of the hole pattern of the first roller drawing module can be adaptively adjusted, so that the whole hole pattern is given way according to the bending direction of the wires, the size of the first roller drawing module is properly enlarged, the processing amount of the first pass is reduced, after the wires are processed by the first roller drawing module, the wires can also have a certain straightening effect, the processing amount of the subsequent passes is improved to compensate the processing amount released by the first pass, and the surface quality defect caused by forced fixed processing amount drawing deformation under the condition that the wires are bent is avoided. The device has the advantages that each roller is adjustable, so that the roller drawing module can flexibly adjust the processing amount of each pass according to actual conditions, even each roller drawing module can be adjusted at any time in the processing process, each roller can adjust the position by means of the threaded screw, the transmission structure of the threaded screw can accurately quantify the feeding amount, for example, the feeding amount can be fed for 0.02mm in one turn, and thus accurate control can be realized no matter manual operation or electric operation.
And finally, when the contact line with the abnormal cross section is formed, the required drawing force is about 1/3 of the drawing force required by a drawing die under the same deformation, the drawing force in the drawing process is greatly reduced, the drawing speed is improved, the service life of equipment is prolonged, 3-10 tons of contact net wires are produced by each set of die during the drawing die, more than 300 tons of contact net wires can be continuously produced by a single set of die, and the production cost is greatly reduced.
The technical scheme can be improved as follows:
further, the roller drawing die comprises a first roller, a second roller and a third roller, wherein the curved roller surfaces of the first roller, the second roller and the third roller form a closed hole pattern, and the shape of the closed hole pattern is matched with the cross section shape of the contact line; and a first joint, a second joint and a third joint are formed between the adjacent rollers.
The adoption of the further technical characteristics has the following technical effects:
the three rollers are more beneficial to the forming of the contact line, and the forming is more stable and labor-saving than the two rollers; the shape of the closed hole formed by the curved roller surface is matched with the cross section shape of the contact line to form the shape required by the contact line.
Further, the roller drawing die comprises a first roller, a second roller, a third roller and a fourth roller, wherein the curved roller surfaces of the first roller, the second roller, the third roller and the fourth roller form a closed hole pattern, and the shape of the closed hole pattern is matched with the cross section shape of the contact line; and a first joint, a second joint, a third joint and a fourth joint are formed between the adjacent rollers.
The adoption of the further technical characteristics has the following technical effects:
the four rollers are adopted, the upper roller pair, the lower roller pair and the left roller pair are adopted, and compressive stress is simultaneously provided from 4 directions, so that the wire rod is stressed more uniformly, and better mutual locking and durability are realized between the dies through the abutting parts.
Further, the roller drawing modules comprise a plurality of groups of roller drawing modules which are sequentially arranged from front to back, and the diameter of the closed hole pattern of each adjacent roller drawing module is reduced from front to back for one time; and the positions of the joints of the adjacent roller pulling modules and the intersection point of the closed hole patterns are different.
The adoption of the further technical characteristics has the following technical effects:
the diameters of the closed hole patterns of the groups of roller drawing modules which are arranged from the front roller close to the inlet of the raw material wire rod to the rear are sequentially reduced, so that the wire rod is molded in stages, the defect that the stress is overlarge due to one-time positioning is avoided, and the labor is saved; and the positions of the joints of the adjacent roller drawing modules are different from the positions of the intersection points of the closed hole patterns, so that the former pass roller drawing module enables the wire rod to form tiny convex edges, the wire rod is flattened when passing through the next pass roller drawing module, and the quality of the contact surface meets the relevant requirements of national standards after the roller drawing of multiple passes.
In addition, the angle of wire rod business turn over roller pulls out the module under the effect of pulling plate hardly guarantees to be ideal straight state always, receive the vibrations of field device, the influence of various factors such as shake of reel, the wire rod business turn over roller pulls out the module can have certain inclination, this inclination is to bringing comparatively serious lateral force for roller pulls out the module, bear by a set of roller pulls out the module alone, the position that is likely to lead to the running roller to be thinner is damaged, set up multiunit roller pulls out the module simultaneously, multiunit roller pulls out the module and can play locking wire rod mutually, play the effect of straightening mutually, also can share the lateral force that the wire rod brought when taking the angle to get into, improve the life of whole equipment.
Further, the axes of the first roller and the second roller are parallel, and the axis of the third roller is perpendicular to the axis of the first roller or the second roller; or the adjacent rollers form an included angle of 120 degrees with each other.
Further, the axes of the first roller and the second roller are parallel, and the axis of the third roller is perpendicular to the axis of the first roller or the second roller; the rolling machine further comprises a supporting roller, and the excircle of the supporting roller is contacted with the side face of the first roller or the second roller.
The adoption of the further technical characteristics has the following technical effects:
the setting of supporting roller has increased the dynamics of roller pull, and secondly in the concatenation department of curved surface, supporting roller supports perpendicularly, prevents the slight expansion deformation of two rollers, also reduces the size of the bead that forms, improves the fashioned accuracy of contact line.
Further, the wheel edge of running roller department is equipped with the portion of leaning on, adjacent running roller's the portion looks adaptation of leaning on, mutual support, and the portion of leaning on that running roller edge department set up forms interlock and support each other with adjacent running roller's the portion of leaning on for whole structure is more stable.
The contact wire forming system comprises an uncoiler, a straightener, at least 1 pull disc, and at least 1 roller drawing device, wherein the roller drawing device adopts the contact wire forming device.
A method of forming a contact wire comprising the steps of:
s1: loading raw material wires into an uncoiler;
s2: straightening and straightening the raw material wire rod by a straightening device to obtain a straightened wire rod;
s3: the straightened wire is subjected to roller drawing deformation by the contact wire forming device to obtain a finished contact wire with preset specification;
s4: and (5) coiling the finished product contact line by a coiling machine.
Further, the pass deformation in the step S3 is 6-30%, the drawing speed is 10-50 m/min, and the diameter of the roller drawing die roller is 120-320 mm.
The adoption of the further technical characteristics has the following technical effects:
proper pass deformation and drawing speed can effectively reduce drawing force in the drawing process, improve drawing efficiency, prolong the service life of a grinding tool and improve the surface quality of a contact line.
Further, the diameter of the raw material wire is phi 16-phi 20, such as copper-silver alloy, copper-tin alloy, copper-magnesium alloy or copper-chromium-zirconium alloy.
The adoption of the further technical characteristics has the following technical effects:
the molding process can be applied to various types of wires.
The mechanical property, the electrical property and the external dimension precision of the high-strength high-conductivity contact net wire formed by adopting the roller drawing die completely meet the requirements of TB/T2809-2017 standard, and the 85mm specified by TB/T2809-2017 can be produced 2 、110mm 2 、120mm 2 、150mm 2 And (5) a contact line. The round section copper rod can also be drawn by adopting a roller drawing die roller drawing forming method.
Drawings
FIG. 1 is a schematic diagram of a roll-drawing process flow including a set of roll-drawing modules according to the present invention;
FIG. 2 is a schematic diagram of a process flow of a roller drawing process comprising two groups of roller drawing modules according to the invention;
FIG. 3 is a schematic drawing of a roll-drawing module;
FIG. 4 is a side view of the roller pull module;
FIG. 5 is a schematic view of a roller drawing die structure;
FIG. 6 is a schematic view of a roller drawing die with a backup roller;
FIG. 7 is a schematic view of a 120 degree roller drawing die structure with three rollers;
FIG. 8 is an enlarged view of a portion of the roller drawing die of FIG. 7;
FIG. 9 is a schematic view showing a partial structure of a roll-drawing die in example 4;
fig. 10 is a cross-sectional shape of a contact line.
The figure indicates:
1. an uncoiler; 2. a straightening device; 3. correcting the pulling disc; 4. a first roller drawing device; 5. a first pull disc; 4', a second roller drawing device; 5', a second pull disc; 6. a coiling machine; 7. a feed guide hole; 8. a roller pulling module; 81. a frame; 9. a discharging guide hole; 10. a contact line; 11. a first roller; 12. a second roller; 13. a third roller; 14. a backup roller; 16. rotating the guide rail; 18. rotating the fixing nut; 19. adjusting a screw rod; 20. a fourth roller; 21. a first seam; 22. a second joint; 23. a third joint; 24. a fourth joint; 25. an abutting portion.
Detailed Description
The invention is described below in connection with examples which are given solely for the purpose of illustration and are not intended to limit the scope of the invention.
As shown in fig. 10, the cross section of the contact line to be processed in the invention is a special-shaped drawing, and the contact line generally comprises an upper cambered surface, a lower cambered surface and a V-shaped clamping groove positioned between the upper cambered surface and the lower cambered surface, wherein the upper cambered surface is provided with alloy identification groove lines (3 small arc grooves in the drawing), the lower cambered surface is a working surface, and the contact line must ensure that the alloy identification groove lines are always upward and the working surface is always downward when in work.
Example 1:
referring to fig. 1 and fig. 3-5, a forming method of a contact line includes the following steps:
s1: coiling the copper-chromium-zirconium alloy raw material wire with the yield strength of phi 16 being more than 500MPa into an uncoiler;
s2: the raw material wire rod is subjected to preliminary correction and straightening through a straightening device 2 and a correction pulling disc 3 to obtain a straightened wire rod;
s3: the straightening wire is pulled by a first pulling disc 5, passes through a feeding guide hole 7 of a first roller drawing device 4 (namely a contact wire forming device), passes through three roller drawing modules in the first roller drawing device 4, and is led out through a discharging guide hole 9; the drawing speed of the straightened wire rod is 10-50 m/min, and the wire rod is deformed by three-pass roller drawing die set roller drawing, thus obtaining 150mm required by TB/T2809-2017 standard 2 Groove-shaped section contact line of contact line specification.
As shown in fig. 3, the first roller drawing device 4 comprises a die holder, 3 roller drawing modules 8 sequentially arranged from front to back, a feeding guide hole 7 and a discharging guide hole 9 are arranged on the die holder, the roller drawing modules comprise a frame 81 and roller drawing dies arranged in the frame 81, the roller drawing dies are used for guiding the inlet and outlet of the contact wire 10, the deviation is avoided, and the surface machining precision of the contact wire 10 is improved. The roller drawing die comprises 4 rollers, the rollers are rotatably arranged on roller supports, the roller supports are arranged in a frame through guide rails, and the roller supports are adjusted to move along the guide rails and are locked at set positions through adjusting screw rods 19; the roll surfaces of the plurality of rolls are closed to form the cross-sectional shape of the contact line 10 to be processed.
The roller drawing module 8 is arranged on the die holder through a rotating mechanism; as shown in fig. 4, the rotating mechanism is a rotating guide rail 16 arranged on the die holder and a rotating fixing nut 18 arranged on the roller drawing die set 8, and is used for rotating and locking the roller drawing die set 8 in a set angle around the axis of the contact line to be processed;
as shown in fig. 5, the die hole of the roll drawing die consists of four curved roll surfaces to form a closed hole pattern. The axes of the first roller 11 and the second roller 12 are parallel, and the axis of the third roller 13 is perpendicular to the axis of the first roller 11 or the second roller 12; the roller drawing device also comprises a supporting roller 14, the outer circle of the supporting roller 14 is contacted with the side surface of the first roller 11 or the second roller 12, and the diameter of the roller drawing die roller is phi 120-320 mm. The supporting roller 14 is arranged to increase the pulling force, and the supporting roller 14 is vertically supported at the splicing position of the curved surfaces to prevent slight expansion deformation of the two rollers, reduce the size of the formed convex edges and improve the forming accuracy of the contact line 10.
In the same roller drawing die set, the diameters of closed hole patterns of adjacent roller drawing dies are sequentially reduced from front to back, the deformation of each pass is 6-30%, the forming of contact lines is facilitated, the labor is saved, and the forming of ribs on wires is prevented or the size of the ribs is reduced. The positions of the intersection points of the joints of the adjacent roller drawing dies and the closed hole type are different, the positions of the intersection points of the joints of the adjacent roller drawing dies and the closed hole type are alternately changed, as shown in fig. 5A, the feeding direction is taken as the front part, and a first joint 21, a second joint 22 and a third joint 23 of a first group of roller drawing dies of the front part are sequentially arranged at the lower part, the upper left side and the upper right side of the closed hole type; as shown in fig. 5B, the first seam 21, the second seam 22 and the third seam 23 of the immediately following set of roller drawing dies are sequentially disposed on the upper portion, the right side and the left side of the closed hole, and then the first seam 21, the second seam 22 and the third seam 23 of the immediately following third set of roller drawing dies are disposed in the same manner as the first set of roller drawing dies (i.e. as shown in fig. 5A), so that in the previous processing, the gap of the roller drawing dies forms a tiny convex rib on the wire rod, and extrusion trowelling can be performed on the next roller drawing die, and the quality of the contact wire 10 meets the requirements through the roller drawing of multiple passes.
S4: the coiler 6 coils the finished contact wire 10.
Example 2:
referring to fig. 2, a method for forming a contact line includes the following steps:
s1: coiling the copper-chromium-zirconium alloy raw material wire with the yield strength of phi 16 being more than 500MPa into an uncoiler;
s2: straightening and straightening the raw material wire rod through a straightening device 2 and a straightening pull disc 3 to obtain a straightened wire rod;
s3: the straightening wire is pulled by the first pulling disc 5, passes through the feeding guide hole 7 of the first roller drawing device 4, passes through three groups of roller drawing dies in the first roller drawing device 4, and is led out through the discharging guide hole 9; pulling the wire rod by a second pulling disc 5', passing through a feeding guide hole of a second roller drawing device 4', guiding the wire rod out by a discharging guide hole 9 after passing through three roller drawing modules in the second roller drawing device 4', and carrying out roller drawing deformation on the wire rod at a drawing speed of 10-50 m/min by a six-pass roller drawing die to obtain 120mm required by TB/T2809-2017 standard 2 Groove-shaped section contact line of contact line specification.
The rotation angle of the roller drawing die set in the first roller drawing die device 4 is different from that of the roller drawing die set in the second roller drawing die device 4', so that the straightening operation of wires is realized in the forming process.
As shown in fig. 6, the die hole of the roller drawing die consists of a curved roller surface of three rollers to form a closed hole type. The roller drawing die comprises a first roller 11, a second roller 12 and a third roller 13, the roller diameter of the roller drawing die is phi 120-320 mm, the curved roller surfaces of the first roller 11, the second roller 12 and the third roller 13 form a closed hole, and the shape of the closed hole is matched with the cross section shape of a contact line with a suspension groove and a copper-chromium-zirconium alloy identification groove to form a required shape. A first joint 21, a second joint 22 and a third joint 23 are formed between the adjacent rollers; the axes of the first roller 11 and the second roller 12 are parallel, and the axis of the third roller 13 is perpendicular to the axis of the first roller 11 or the second roller 12. Other arrangement modes are the same as those of embodiment 1, and will not be described again.
S4: the coiler 6 coils the finished contact wire 10.
Example 3:
similarly to example 2, the hole pattern consisted of 3 rollers, but the three rollers were at 120 degrees to each other as shown in fig. 7 and 8. The wheel edge of the roller is provided with the abutting part 25, and the adjacent rollers form mutual supporting interlocking by virtue of the abutting part 25, so that the stability of the hole patterns is ensured, and other setting modes are the same as those of the embodiment 2 and are not repeated.
Example 4:
in this example, the die hole of the roller drawing die is formed by the curved surface roller surfaces of another four rollers to form a closed hole, as shown in fig. 9, and the closed hole comprises a first roller 11, a second roller 12, a third roller 13 and a fourth roller 14, the curved surface roller surfaces of the first roller 11, the second roller 12, the third roller 13 and the fourth roller 14 form a closed hole, and the shape of the closed hole is matched with the cross section shape of a contact line with a suspension groove and a copper-chromium-zirconium alloy identification groove. A first joint 21, a second joint 22, a third joint 23 and a fourth joint 24 are formed between the adjacent rollers; the wheel edge of each roller is provided with an abutting part 25, and the abutting parts of the adjacent rollers are matched and mutually supported, so that the hole patterns are more stable. Other arrangement modes are the same as those of embodiment 1 and embodiment 2, and will not be described again.
150mm of copper-chromium-zirconium alloy contact line obtained in example 1 2 (CTCZ 120) 120mm contact line with copper-chromium-zirconium alloy obtained in example 2 2 The test data of mechanical properties, electrical properties, external dimensions, etc. (CTCZ 150) are as follows:
description:
a, B, C, D, H, G notation:
as shown in fig. 10, a-section diameter (height); b-section width; c-head width; d- (groove bottom spacing);
h-beveling; g-lower bevel.
2. Vibration test: amplitude 35mm, frequency 3Hz, sine wave, applied test tension 31.5kN;
3. fatigue test: dynamic test tension of 30+/-9 kN, frequency of 3Hz and sine wave;
4. flatness test: applying a tension of 30kN;
5. abrasion test: the speed is 350km/h, the current is 580A, the static positive pressure between the archwires is 70+/-10N, and a pure carbon slide plate is used for test;
labeled as the super-difference value.
The tensile strength, the electrical resistivity (20 ℃) and the electrical conductivity (20 ℃) of CTCZ120 are 120.25mm according to the measured sectional area 2 And calculating the obtained result.
The tensile strength, the electrical resistivity (20 ℃) and the electrical conductivity (20 ℃) of CTCZ150 are 148.52mm according to the measured sectional area 2 And calculating the obtained result.
The copper-chromium-zirconium alloy contact line obtained in example 1 is 120mm 2 (CTCZ 120) 150mm contact line with copper-chromium-zirconium alloy obtained in example 2 2 The mechanical properties, electrical properties, physical dimensions, etc. of (CTCZ 150) are fully compliant with the requirements of the TB/T2809-2017 standard.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (9)

1. The contact wire forming device comprises a die holder and a plurality of roller drawing modules which are sequentially arranged from front to back, and is characterized in that the roller drawing modules are arranged on the die holder through a rotating mechanism;
the rotating mechanism is used for enabling the roller drawing module to rotate around the axis of the contact line to be processed and be locked at a set angle;
the roller drawing die comprises at least 3 rollers, the rollers are rotatably arranged on roller supports, the roller supports are arranged in the frame through guide rails, and an adjusting mechanism is arranged and used for adjusting the roller supports to move along the guide rails and be locked at a set position; the roller surfaces of the rollers are enclosed to form a cross-sectional shape of a contact line to be processed, the curved roller surfaces of the rollers form a closed hole, and the shape of the closed hole is matched with the cross-sectional shape of the contact line;
the diameters of the closed hole patterns of the adjacent roller drawing modules are sequentially reduced from front to back;
and joints are formed between adjacent rollers in the roller drawing die, and the positions of the joints of adjacent roller drawing die sets and the intersection points of the closed hole patterns are different.
2. The contact wire forming device as claimed in claim 1, wherein the roller drawing die comprises a first roller, a second roller and a third roller, and curved roller surfaces of the first roller, the second roller and the third roller form a closed hole pattern; a first joint, a second joint and a third joint are formed between the adjacent rollers.
3. The contact wire forming device as claimed in claim 1, wherein the roller drawing die comprises a first roller, a second roller, a third roller and a fourth roller, and curved roller surfaces of the first roller, the second roller, the third roller and the fourth roller form a closed hole pattern; and a first joint, a second joint, a third joint and a fourth joint are formed between the adjacent rollers.
4. The contact wire forming device according to claim 2, wherein the axes of the first roller and the second roller are parallel, and the axis of the third roller is perpendicular to the axis of the first roller or the second roller; the rolling machine further comprises a supporting roller, and the excircle of the supporting roller is contacted with the side surfaces of the first roller and the second roller.
5. The contact wire forming device of claim 2, wherein adjacent rollers are angled 120 degrees from each other.
6. The contact wire forming device according to claim 1, wherein the edge of the roller is provided with an abutting portion, and the abutting portions of the adjacent rollers are adapted to each other and mutually support.
7. A contact wire forming system comprising an uncoiler, a straightener, at least 1 pull disc, and at least 1 roller drawing device, wherein the roller drawing device adopts the contact wire forming device as claimed in any one of claims 1-6.
8. A method of forming a contact wire comprising the steps of:
s1: loading raw material wires into an uncoiler;
s2: straightening and straightening the raw material wire rod by a straightening device to obtain a straightened wire rod;
s3: carrying out roller drawing deformation on the straightened wire rod through at least one set of contact line forming device according to any one of claims 1-6 to obtain a finished contact line with preset specification;
s4: and (5) coiling the finished product contact line by a coiling machine.
9. The method according to claim 8, wherein the pass deformation in S3 is 6 to 30%, the drawing speed is 10 to 50m/min, and the diameter of the drawing roller is 120 to 320mm.
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