CN101685690B - Production process of aluminum sheath cable - Google Patents
Production process of aluminum sheath cable Download PDFInfo
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- CN101685690B CN101685690B CN200810111377A CN200810111377A CN101685690B CN 101685690 B CN101685690 B CN 101685690B CN 200810111377 A CN200810111377 A CN 200810111377A CN 200810111377 A CN200810111377 A CN 200810111377A CN 101685690 B CN101685690 B CN 101685690B
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Abstract
The invention discloses a production process of an aluminum sheath cable, relating to the field of communication and signal cable production. The traditional high-frequency welding process is difficult to avoid the problems of pin holes and tack weld, and the standard length of each weldment is only 6 m; in order to weld an aluminum sheath cable, the length of which can reach thousand meters, the invention provides the production process for welding the aluminum sheath cable by the following steps: firstly shaping by a sheath and then welding at high frequency, wherein the thickness of an aluminum tape is 0.5-2.5 mm, the diameter of the aluminum sheath is 10-70 mm, the welding depth is 0.3-2.0 mm, the welding meeting angle is 4-12 degrees, the frequency of induced current is 350-500kHz, the welding power is 100-200kW and the welding speed can approach 100m/min; heating the aluminum sheath cable to be in a molten state at the edge of the meeting angle; then combining contact surface molecules by the extrusion of both side extruding devices to form crystal so as to achieve the goals of no pin holes, no tack weld and even welding; and finally reducing and shaping. The invention has the advantages of simple process, reliable quality, low cost, high production efficiency and little energy consumption.
Description
Technical field
The present invention relates to communication, information equipment field, especially cable production technology.
Technical background
Aluminum-sheathed cable has obtained development rapidly in the recent period, and the difficult point of producing aluminum-sheathed cable is aluminium sheath, because the aluminium molecule is very active, is prone to oxidation, and welding has brought bigger difficulty to aluminium sheath.For solving problem of oxidation, all adopt argon arc welding technique, as protective gas, prevent the generation of oxide-film with the inert gas argon gas.But it is slow that the shortcoming of argon arc welding is a speed of production, and efficient is low, and per minute is merely 6-15 rice, when producing in enormous quantities, need drop into many production equipments; Increase the energy, argon gas, the manpower consumption is many, increases the cost of product, and the characteristics of cable production are that the length of every product is very long in addition; Reach more than 1000 meters, the welding of common metal pipe, pipe standard length is merely 6 meters, and therefore the difficulty or ease difference is very big in the control of welding quality; As long as guarantee even weld within 6 meters in the welding to metal tube, free of pinholes, no dry joint, as above defective takes place; Scrap a loss of 6 meters just, and, will guarantee that km is with interior free of pinholes the welding of cable; No dry joint, as above defective takes place, scrap a loss that just can cause the km cable.The long most possible technology of aluminium sheath welding of suitable length that can overcome the argon arc welding shortcoming is high-frequency welding, and it is fast that it has speed of welding, the characteristics that welding quality is good.High-frequency welding is by the kelvin effect of high-frequency current and proximity effect; Kelvin effect makes the top layer of high-frequency electrical concentration of energy in weldment; The position and the scope of proximity effect may command high-frequency current glide path; High-frequency welding is exactly according to the concrete form of weldment structure and specific (special) requirements, make the top layer metal Fast Heating at weldment place to be welded and realize the welding.High-frequency welding to aluminium sheath need solve following problem: the specific constructive form of aluminium sheath welding; Select suitably high power frequency, make weld heat-affected zone narrow, the inwall electric current is few; Select suitable power, guarantee that speed of welding is fast, welding quality is good.
Summary of the invention
The object of the invention is that a kind of lengthy product that can be suitable for km length is provided, and guarantees to weld free of pinholes, no dry joint, stay-in-grade aluminum-sheathed cable production technology.
The technical scheme that realizes above-mentioned purpose is following:
The production technology of aluminum-sheathed cable, form by following process steps:
(1) extract cable core out from pay off rack, extract aluminium strip out from putting tape holder, the thick 0.5-2.5mm of aluminium strip, bandwidth 30-210mm, aluminium strip are in the cable core below;
(2) with in cable core and the aluminium strip input aluminium sheath shaped device, be rolled into aluminium sheath, cable core is twisted in the aluminium sheath, the aluminium sheath diameter is 10-70mm, and the welding that forms 4 °-12 ° in the aluminium strip two edges that aluminium sheath closes up the place converges the angle;
(3) input of the aluminium sheath after moulding high frequency induction welding is met sb. at the airport, and pushes and welds, and the induced current frequency is 350-500kHZ, and bonding power is 100-200kw, and speed of welding is the highest to can be controlled in 100 meters/minute;
(4) the input shaper device carries out the tube reducing shaping to the aluminum-sheathed cable after welding;
(5) input take-up, arrangement is wrapped on the cable hank.
Aluminium strip is adopted in the aluminium sheath moulding.Through carrying out the transition to the repeatedly crooked last moulding of minor radius gradually from long radius, the radius of curvature of aluminium strip two edges space tracking is all the time greater than the radius of aluminium sheath sleeve pipe.
The a series of slotted eyes and positive circular port of the aperture that the tube reducing shaping is taked for carry out the transition to the small-bore gradually from the large aperture, and alternately place, make aluminum-sheathed cable produce horizontal and vertical plastic deformation respectively, the tube reducing scope is 0.5-1.5mm.
When aluminium sheath being carried out HFI welding, be soldered aluminium sheath and from inductor, pass, when inductor feeds high-frequency current according to technique scheme; Because proximity effect, most of electric current is in the marginal flow mistake to be welded of cable cover(ing), and becomes the loop to constitute welding current converging dihedral; Moment is heated to melting degree; Because the refractory oxides that the oxide of aluminium strip weld and welding process form is removed making a concerted effort that pressurizing unit forms through both sides by the liquid metal splash, closely press together, thereby the contact-making surface molecule is combined; Form crystallization, accomplish welding.When the aluminium sheath moulding, make up the curved edge moulding through most footpaths; Removed the aluminium strip edge and formed the defective of scollop, scallop, and selected 4 °-12 ° the angle of converging, as it is too big to converge the angle; The kelvin effect and the proximity effect of aluminium strip edge end face high-frequency current weaken; Welding current reduces, and current loss increases, and welding efficiency reduces; As it is too little to converge the angle, is prone to before the point prerequisite, get over arc, influences weldquality.
Under the equipment state normal condition, speed of welding can be near 100 meters/minute, and speed of welding is accelerated, and shorten heating time, and the metal oxide that welding forms is just few, and weldquality is reliable more.
Bonding power directly and the specification of aluminium sheath, the aluminium strip width, speed of welding and production capacity are directly relevant; According to parameters involved in the present invention; Bonding power is 100-200kw, is 0.5-2.5mm according to al zone thickness, and the length of penetration of welding current is 0.3-2.0mm; The frequency of welding current directly affects kelvin effect and proximity effect, according to the thickness and the aluminium sheath external diameter 10-70mm of aluminium strip, under the prerequisite that guarantees welding quality, saves bonding power as far as possible, and the welding current frequency is 350-500kHz.Aluminum-sheathed cable is through the tube reducing apparatus for shaping after the high-frequency welding; Through a series of tube reducing slotted eyes of alternately placing with positive circular port from big footpath gradually to the path shaping; Cable produces repeatedly horizontal and vertical plastic deformation, has eliminated welding deformation, and has made the aluminium sheath external diameter reach required nominal dimension.
The present invention has following beneficial effect:
1, the aluminum-sheathed cable of technology manufacturing of the present invention is carrying out seal tightness test in the length of regulation, mechanical bend performance test and hole expansion test have all reached national standard, have eliminated pin hole and dry joint phenomenon, have stopped percent defective, have guaranteed quality;
2, technology is simple, and production cost is low, and production efficiency is high;
3, power consumption is low, pollution-free, and energy-conserving and environment-protective have the good social benefit.
Description of drawings
Fig. 1 is an aluminum-sheathed cable production line sketch map of the present invention
The name of each sequence number is called among the figure:
1-pay off rack, 2-cable core, 3-are put tape holder, 4-aluminum strip, 5-aluminium sheath make-up machine, 6-high-frequency welder
7-operating desk, 8-tube reducing frame, 9-caterpillar-tractor, 10-aluminum-sheathed cable, 11-take-up stand,
12-mains switch cabinet, 13-traction cabinet, 14-AC voltage adjusting cabinet, 15-step-up transformer, 16-rectifying and wave-filtering cabinet,
Cabinet, 18-cooling tower are full of in 17-shake
Embodiment
Al zone thickness is 1mm, and bandwidth 70mm is through the moulding of aluminium sheath make-up machine; Cable core penetrates in the sheath to be welded; The entering high frequency induction welding is met sb. at the airport, and to 400kHz, it is 90 meters/minute that bonding power is adjusted to the 150kw speed of welding with the induced current frequency adjustment; The depth of weld is that 0.5mm carries out high-frequency welding, is wound on the cable hank in the take-up stand behind the cable process tube reducing frame tube reducing that welds.
Embodiment 2 cable sizes are 55mm, the cable of length 1000m
Al zone thickness is 2.5mm, and bandwidth 190mm is shaped through the aluminium sheath forming machine; Cable core penetrates in the sheath to be welded; The entering high frequency induction welding is met sb. at the airport, and to 500kHz, it is 80 meters/minute that bonding power is adjusted to the 200kw speed of welding with the induced current frequency adjustment; The depth of weld is that 2.0mm carries out high-frequency welding, and the cable that welds is wound on the cable hank in the take-up stand through behind the tube reducing.
Claims (3)
1. the production technology of aluminum-sheathed cable is characterized by: be made up of following process steps:
(1) extract cable core out from pay off rack, extract aluminium strip out from putting tape holder, the thick 0.5-2.5mm of aluminium strip, bandwidth 30-210mm, aluminium strip are in the cable core below;
(2) with in cable core and the aluminium strip input aluminium sheath shaped device, be rolled into aluminium sheath, cable core is twisted in the aluminium sheath, the aluminium sheath diameter is 10-70mm, and the welding that forms 4 °-12 ° in the aluminium strip two edges that aluminium sheath closes up the place converges the angle;
(3) input of the aluminium sheath after moulding high frequency induction welding is met sb. at the airport, and pushes and welds, and the induced current frequency is 350-500kHz, and bonding power is 100-200kw, and speed of welding is the highest to can be controlled in 100 meters/minute;
(4) the input shaper device carries out the tube reducing shaping to the aluminum-sheathed cable after welding;
(5) input take-up, arrangement is wrapped on the cable hank.
2. the production technology of aluminum-sheathed cable according to claim 1; It is characterized by: aluminium strip is adopted in the aluminium sheath moulding; Aluminium strip carries out the transition to the repeatedly crooked last of minor radius gradually from long radius and is shaped, and the radius of curvature of aluminium strip two edges space tracking is all the time greater than the radius of aluminium sheath sleeve pipe.
3. the production technology of aluminum-sheathed cable according to claim 1; It is characterized by: a series of slotted eyes and positive circular port of the aperture that the tube reducing shaping is taked for carry out the transition to the small-bore gradually from the large aperture; And alternately place; Make aluminum-sheathed cable produce horizontal and vertical plastic deformation respectively, the tube reducing scope is 0.5-1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810111377A CN101685690B (en) | 2008-09-25 | 2008-09-25 | Production process of aluminum sheath cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810111377A CN101685690B (en) | 2008-09-25 | 2008-09-25 | Production process of aluminum sheath cable |
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| Publication Number | Publication Date |
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| CN101685690A CN101685690A (en) | 2010-03-31 |
| CN101685690B true CN101685690B (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810111377A Active CN101685690B (en) | 2008-09-25 | 2008-09-25 | Production process of aluminum sheath cable |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107680748B (en) * | 2017-09-28 | 2019-03-19 | 国网山东省电力公司经济技术研究院 | A kind of cable aluminium strip wrapping machine |
| CN111952014A (en) * | 2020-09-02 | 2020-11-17 | 江苏亨通线缆科技有限公司 | Production system of aluminum sheath cable |
| CN112071519A (en) * | 2020-09-02 | 2020-12-11 | 江苏亨通线缆科技有限公司 | Processing method of aluminum sheath cable |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB875905A (en) * | 1958-08-26 | 1961-08-23 | Siemens Ag | Improvements in or relating to processes for use in the production of impregnated electric cables |
| GB1340557A (en) * | 1970-03-26 | 1973-12-12 | ||
| DE2851800A1 (en) * | 1978-11-30 | 1980-06-12 | Kabel Metallwerke Ghh | Multicore telecommunication cable - obtd. by surrounding moving core with metal strip coated with ethylene! copolymer and fusing with HF coil |
| CN101140819A (en) * | 2007-07-25 | 2008-03-12 | 通鼎集团有限公司 | Electrical cable aluminium sheath squeezing welding device |
| CN201311797Y (en) * | 2008-11-22 | 2009-09-16 | 浙江万马天屹通信线缆有限公司 | Coaxial cable sheathing machine |
-
2008
- 2008-09-25 CN CN200810111377A patent/CN101685690B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB875905A (en) * | 1958-08-26 | 1961-08-23 | Siemens Ag | Improvements in or relating to processes for use in the production of impregnated electric cables |
| GB1340557A (en) * | 1970-03-26 | 1973-12-12 | ||
| DE2851800A1 (en) * | 1978-11-30 | 1980-06-12 | Kabel Metallwerke Ghh | Multicore telecommunication cable - obtd. by surrounding moving core with metal strip coated with ethylene! copolymer and fusing with HF coil |
| CN101140819A (en) * | 2007-07-25 | 2008-03-12 | 通鼎集团有限公司 | Electrical cable aluminium sheath squeezing welding device |
| CN201311797Y (en) * | 2008-11-22 | 2009-09-16 | 浙江万马天屹通信线缆有限公司 | Coaxial cable sheathing machine |
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| Publication number | Publication date |
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| CN101685690A (en) | 2010-03-31 |
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Address after: 741000 741000 Applicant after: Tianshui Railway Cable Works Address before: 741000 Gansu province Tianshui District No. 4 Jian River Applicant before: Tianshui Railway Cable Works |
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Free format text: CORRECT: APPLICANT; FROM: TIANSHUI RAILWAY CABLE WORKS TO: TIANSHUI RAILWAY CABLE CO., LTD. |
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