CN103042366B - Manufacturing technique for copper pipes for magnetrons - Google Patents
Manufacturing technique for copper pipes for magnetrons Download PDFInfo
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- CN103042366B CN103042366B CN201310011935.5A CN201310011935A CN103042366B CN 103042366 B CN103042366 B CN 103042366B CN 201310011935 A CN201310011935 A CN 201310011935A CN 103042366 B CN103042366 B CN 103042366B
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Abstract
The invention discloses a manufacturing technique for copper pipes for magnetrons. The manufacturing technique comprises: (a) horizontal continuous casting; (b) surface milling; (c) three-roller planetary rolling; (d) straight pulling for sizing; (e) cleaning; and (f) checking and storing. Compared with the prior art, raw materials utilized by the manufacturing technique comprise standard cathode copper and high-purity cathode copper, the material utilization is wide, the technical processes are changed into 6 processes from the prior 12 processes, and prior equipment in copper pipe plants can be used for manufacturing. The technical process is short, occupied manufacturing sites are few, the production efficiency is high, the yield is high, the production cost is low, the energy consumption is little, and the applicability is wide.
Description
Technical field
The present invention relates to technical field of nonferrous metal processing, particularly relate to a kind of production technology of copper pipe for magnetic control pipe.
Background technology
Energy-saving and emission-reduction are long-term policies of national industry development, and the development of an enterprise also needs ceaselessly to open up out frontier.For existing copper pipe manufacturer except development air-conditioner pipe and communication tube except, to special pipe development, being extremely necessary, wherein, is then good selection for the magnetron in micro-wave oven.The production technology of original copper pipe for magnetic control pipe is generally: batching-melting-converter-deoxidation-casting-extruding-tube rolling-stretch-strip off the skin-stretching-finishing-inspection warehouse-in totally 12 procedures, its raw material require as Cu-CATH-1, complex process, equipment needed thereby investment is large, floor space is many, production operation personnel are many, energy consumption is high, production process waste material is many.
The copper pipe technical requirement that magnetron uses is higher, and it is mainly to component requirements and dimensional discrepancy:
1), component requirements: O≤5ppm, P≤6ppm, S≤15ppm, Fe≤10ppm, and do not allow grain boundaries to have hydrogen embrittlement, boundary segregation phenomenon.
2), dimensional discrepancy (mm)
| Specification | Outside diameter tolerance | Wall thickness deviation | Eccentricity % |
| 39x1.85(external diameter x wall thickness) | ±0.05 | ±0.05 | ≤0.15 |
3), mechanical property
| The trade mark | State | Tensile strength (N/mm2) | Hardness (HV1) |
| TU1 | Y | ≥315 | ≥80 |
Summary of the invention
Object of the present invention provide a kind of under copper pipe factory existence conditions by improving equipment, distribution and adjusting process, produce the production technology of the copper pipe for magnetic control pipe of microwave-oven-heating equipment.
The production technology of this copper pipe for magnetic control pipe provided by the invention, comprises the steps:
(a) horizontal casting;
(b) milling face;
(c) three-roll planetary rolling, the step of this three-roll planetary rolling is:
(1) 3 roller heads are used to substitute survey tool, to three-roller planetary rolling mill bearing and roller head position adjustments and correction, survey tool requires that the tolerance of circular runout is 0.025mm, the tolerance of cylindricity is 0.005mm, this bearing calibration comprises the steps: that (I) first measures three survey tool gaps with thickness gauge, makes three survey tool gaps consistent by regulating; (II) survey tool is contained in after on milling train, is gone to horizontal direction respectively, utilize level meter slowly to adjust and ensure survey tool level; (III) Non-follow control rotates attachment driving shaft and makes survey tool rotation again, measures survey tool one by one and beats, and it beats at 0.05 ~ 0.08mm to ensure each survey tool by adjustment; (IV) after guaranteeing that survey tool is beated, dial gauge is fixed on auxiliary mould, rotate main transmission main rotary shaft or subrack of walking around, rotor rack drives three survey tool revolution, and three survey tools maximum of the number of degrees from dial gauge is relative to each other in 0.08 ~ 0.1mm; If difference is comparatively large, then adjusts separately one or two survey tool, finally make it meet the demands; (V) load onto three roller heads, measure the gap between three roller heads, make three roller head gaps consistent with step I Measuring Time gap by thickness gauge; (VI) select the rolling calibration coupon of 46 ~ 48mm, rotate attachment driving shaft and three rolls are contacted gently with calibration coupon, and can twitch back and forth;
(2) mill data is controlled: main fast 400 ± 10r/min, auxiliary fast 600 ~ 800r/min, rate of bending 14 ~ 18r/min, rolling speed 8 ~ 15 r/min, stable rolling enter pipe speed 0.8 ~ 1.5 r/min, propelling pressure 18 ~ 22kN, stable rolling exit velocity 0.9 ~ 1m/min, pusher dolly uniform motion;
(3) roll out be of a size of (46 ~ 48) x(2.4 ~ 2.8) copper pipe of mm;
(d) vertical pulling scale;
E () cleans;
F () checks warehouse-in.
Described horizontal casting comprises the steps:
(1) select Cu-CATH-1 or standard cathode copper as batching, ensure its dry tack free before reinforced and surperficial without copper beans;
(2) melting furnace is adopted to melt, fill it up with until it and add charcoal after batching and close fire door, 450 ~ 500 DEG C of calcinings 5 ~ 7 hours before charcoal uses, prevent from entering copper liquid at adition process oxygen, charcoal cladding thickness is 100 ~ 150mm, and the smelting temperature of melting furnace is 1130 ~ 1200 DEG C; When selection standard tough cathode is for batching, the phosphor copper adding P≤6ppm carries out deoxidation;
(3) the copper water in melting furnace is proceeded to holding furnace inside holding and copper water will tightly be protected, the crystalline flake graphite adding thickness 100 ~ 150mm covers copper water surface;
(4) add in holding furnace content of rare earth be 0.010% rare earth alloy copper carry out deoxygenation and crystal grain thinning;
(5) by the wall thickness control of horizontal casting out copper pipe at 90 ± 1mm, then reduce casting speed to 240 ~ 280mm/min and continue casting 30 minutes, finally return to normal speed and adopt crystallizer to cool.
Described milling face is by ingot casting surface scale mill off, and aligns ingot casting, the depth of cut 0.4 ~ 1.2mm.
Described vertical pulling scale comprises the steps:
(1) wall thickness (WT max-WT the min)≤0.25mm of copper pipe after rolling is guaranteed;
(2) carry out a time stretching to the rolling copper pipe, stretch process rate is 1.2 ~ 1.8; Ensure that rolling copper pipe does not swing when vertical pulling progressive die, subtract wall thickness requirement according to the tube reducing that vertical pulling requires, stretching die is of a size of 39.65 ± 0.02mm, angle 25 ~ 30 °, floating core head size: microcephaly: 35.95 ± 0.02 mm, major part: 40.7 ± 0.02mm, angle 26 ~ 30 °.
Compared with prior art, the raw material of employing of the present invention comprise standard tough cathode and Cu-CATH-1, and stock utilization is wide, and technological process is also become six roads from existing 12 roads, copper pipe factory existing equipment can be utilized to produce.Technological process of the present invention is short, takies production site few, and production efficiency is high, and lumber recovery is high, and production cost is low, less energy consumption, and adaptability is extensive.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that roller head in the present invention substitutes survey tool.
Detailed description of the invention
Embodiment 1
1, horizontal casting
(1) select Cu-CATH-1 as batching, ensure its dry tack free before reinforced and surperficial without copper beans, all furnace charges and coverture all will carry out drying operation;
(2) above-mentioned batching is put into melting furnace to melt, after batching is filled it up with, add charcoal and close fire door, charcoal cladding thickness is 100 ~ 150mm, the smelting temperature of melting furnace is 1130 ~ 1200 DEG C, prevent from entering copper liquid at adition process oxygen, in 450 ~ 500 DEG C of calcinings, 5 ~ 7 hours (containing heating/cooling) before charcoal uses;
(3) the copper water in melting furnace is proceeded to holding furnace inside holding and copper water will tightly be protected, the crystalline flake graphite adding thickness 100 ~ 150mm covers copper water surface;
(4) add in holding furnace content of rare earth be 0.010% rare earth alloy copper carry out deoxygenation and crystal grain thinning;
(5) by the wall thickness control of horizontal casting out copper pipe at 90 ± 1mm, reduce casting speed again to 240 ~ 280mm/min and continue casting 30 minutes, finally return to normal speed, production process is not changed chute and is avoided being mixed into oxygen, adopts crystallizer to cool.
2, milling face
By ingot casting surface scale mill off, and ingot casting is aligned, the depth of cut 0.4 ~ 1.2mm.
3, three-roll planetary rolling
(1) 3 roller heads are used to substitute survey tool, to three-roller planetary rolling mill bearing and roller head position adjustments and correction, survey tool requires that the tolerance of circular runout is 0.025mm, the tolerance of cylindricity is 0.005mm, wherein comprises the steps: three-roller planetary rolling mill bearing and roller head method for correcting position with survey tool
(I) first measuring three survey tool gaps with thickness gauge, making three survey tool gaps consistent by regulating;
(II) survey tool is contained in after on milling train, is gone to horizontal direction respectively, utilize level meter slowly to adjust and ensure survey tool level;
(III) Non-follow control rotates attachment driving shaft and makes survey tool rotation again, measures survey tool one by one and beats, and it beats at 0.05 ~ 0.08mm to ensure each survey tool by adjustment;
(IV) after guaranteeing that survey tool is beated, dial gauge is fixed on auxiliary mould, rotate main transmission main rotary shaft (or subrack of walking around), rotor rack drives three survey tool revolution, and three survey tools maximum of the number of degrees from dial gauge is relative to each other in 0.08 ~ 0.1mm; If difference is comparatively large, then adjusts separately one or two survey tool, finally make it meet the demands;
(V) load onto three roller heads, measure the gap between three roller heads, make three roller head gaps consistent with step I Measuring Time gap by thickness gauge;
(VI) select the rolling calibration coupon of 46 ~ 48mm, rotate attachment driving shaft and three rolls are contacted gently with calibration coupon, and can twitch back and forth;
(2) mill data is controlled: main fast 400 ± 10r/min, auxiliary fast 600 ~ 800r/min, rate of bending 14 ~ 18r/min, rolling speed 8 ~ 15 r/min, stable rolling enter pipe speed 0.8 ~ 1.5 r/min, propelling pressure 18 ~ 22kN, stable rolling exit velocity 0.9 ~ 1m/min, pusher dolly uniform motion;
(3) roll out be of a size of (46 ~ 48) x(2.4 ~ 2.8) copper pipe of mm.
4, vertical pulling scale
(1) wall thickness (WT max-WT the min)≤0.25mm of copper pipe after rolling is guaranteed;
(2) carry out a time stretching to the rolling copper pipe, stretch process rate is 1.2 ~ 1.8; Ensure that rolling copper pipe does not swing when vertical pulling progressive die, subtract wall thickness requirement according to the tube reducing that vertical pulling requires, stretching die is of a size of 39.65 ± 0.02mm, angle 25 ~ 30 °, floating core head size: microcephaly: 35.95 ± 0.02 mm, major part: 40.7 ± 0.02mm, angle 26 ~ 30 °.
5, clean
Copper pipe after vertical pulling is put into cleaning case, adds cleaning agent and clean.
6, warehouse-in is checked
Copper pipe after cleaning is checked, and qualified products is put into product storehouse.
Embodiment 2
1, horizontal casting
(1) selection standard tough cathode is as batching, ensures its dry tack free before reinforced and surperficial without copper beans, without surperficial hangers, and all furnace charges and coverture all will carry out drying operation;
(2) above-mentioned batching is put into melting furnace to melt, after batching is filled it up with, add charcoal and close fire door, charcoal cladding thickness is 100 ~ 150mm, the smelting temperature of melting furnace is 1130 ~ 1200 DEG C, prevent from entering copper liquid at adition process oxygen, in 450 ~ 500 DEG C of calcinings, 5 ~ 7 hours (containing heating/cooling) before charcoal uses; Measure copper water weight and constituent content, add phosphor copper and carry out deoxidation, guarantee P≤6ppm, then add the further deoxygenation of calcium boride of 0.12 ~ 0.25% according to oxygen content situation in copper liquid;
(3) the copper water in melting furnace is proceeded to holding furnace inside holding and copper water will tightly be protected, the crystalline flake graphite adding thickness 100 ~ 150mm covers copper water surface;
(4) add in holding furnace content of rare earth be 0.010% rare earth alloy copper carry out deoxygenation and crystal grain thinning;
(5) by the wall thickness control of horizontal casting out copper pipe at 90 ± 1mm, reduce casting speed again to 240 ~ 280mm/min and continue casting 30 minutes, finally return to normal speed, production process is not changed chute and is avoided being mixed into oxygen, adopts crystallizer to cool.
2, milling face
By ingot casting surface scale mill off, and ingot casting is aligned, the depth of cut 0.4 ~ 1.2mm.
3, three-roll planetary rolling
(1) 3 roller heads are used to substitute survey tool, to three-roller planetary rolling mill bearing and roller head position adjustments and correction, survey tool requires that the tolerance of circular runout is 0.025mm, the tolerance of cylindricity is 0.005mm, wherein comprises the steps: three-roller planetary rolling mill bearing and roller head method for correcting position with survey tool
(I) first measuring three survey tool gaps with thickness gauge, making three survey tool gaps consistent by regulating;
(II) survey tool is contained in after on milling train, is gone to horizontal direction respectively, utilize level meter slowly to adjust and ensure survey tool level;
(III) Non-follow control rotates attachment driving shaft and makes survey tool rotation again, measures survey tool one by one and beats, and it beats at 0.05 ~ 0.08mm to ensure each survey tool by adjustment;
(IV) after guaranteeing that survey tool is beated, dial gauge is fixed on auxiliary mould, rotate main transmission main rotary shaft (or subrack of walking around), rotor rack drives three survey tool revolution, and three survey tools maximum of the number of degrees from dial gauge is relative to each other in 0.08 ~ 0.1mm; If difference is comparatively large, then adjusts separately one or two survey tool, finally make it meet the demands;
(V) load onto three roller heads, measure the gap between three roller heads, make three roller head gaps consistent with step I Measuring Time gap by thickness gauge;
(VI) select the rolling calibration coupon of 46 ~ 48mm, rotate attachment driving shaft and three rolls are contacted gently with calibration coupon, and can twitch back and forth;
(2) mill data is controlled: main fast 400 ± 10r/min, auxiliary fast 600 ~ 800r/min, rate of bending 14 ~ 18r/min, rolling speed 8 ~ 15 r/min, stable rolling enter pipe speed 0.8 ~ 1.5 r/min, propelling pressure 18 ~ 22kN, stable rolling exit velocity 0.9 ~ 1m/min, pusher dolly uniform motion.
(3) roll out be of a size of (46 ~ 48) x(2.4 ~ 2.8) copper pipe of mm.
4, vertical pulling scale
(1) wall thickness (WT max-WT the min)≤0.25mm of copper pipe after rolling is guaranteed;
(2) carry out a time stretching to the rolling copper pipe, stretch process rate is 1.2 ~ 1.8; Ensure that rolling copper pipe does not swing when vertical pulling progressive die, subtract wall thickness requirement according to the tube reducing that vertical pulling requires, stretching die is of a size of 39.65 ± 0.02mm, angle 25 ~ 30 °, floating core head size: microcephaly: 35.95 ± 0.02 mm, major part: 40.7 ± 0.02mm, angle 26 ~ 30 °.
5, clean
Copper pipe after vertical pulling is put into cleaning case, adds cleaning agent and clean.
6, warehouse-in is checked
Copper pipe after cleaning is checked, and qualified products is put into product storehouse.
Claims (4)
1. a production technology for copper pipe for magnetic control pipe, is characterized in that comprising the steps:
(a) horizontal casting;
(b) milling face;
(c) three-roll planetary rolling, the step of this three-roll planetary rolling is:
(1) 3 roller heads are used to substitute survey tool, to three-roller planetary rolling mill bearing and roller head position adjustments and correction, survey tool requires that the tolerance of circular runout is 0.025mm, the tolerance of cylindricity is 0.005mm, this bearing calibration comprises the steps: that (I) first measures three survey tool gaps with thickness gauge, makes three survey tool gaps consistent by regulating; (II) survey tool is contained in after on milling train, is gone to horizontal direction respectively, utilize level meter slowly to adjust and ensure survey tool level; (III) Non-follow control rotates attachment driving shaft and makes survey tool rotation again, measures survey tool one by one and beats, and it beats at 0.05 ~ 0.08mm to ensure each survey tool by adjustment; (IV) after guaranteeing that survey tool is beated, dial gauge is fixed on auxiliary mould, rotate main transmission main rotary shaft or subrack of walking around, rotor rack drives three survey tool revolution, and three survey tools maximum of the number of degrees from dial gauge is relative to each other in 0.08 ~ 0.1mm; If difference is comparatively large, then adjusts separately one or two survey tool, finally make it meet the demands; (V) load onto three roller heads, measure the gap between three roller heads, make three roller head gaps consistent with step I Measuring Time gap by thickness gauge; (VI) select the rolling calibration coupon of 46 ~ 48mm, rotate attachment driving shaft and three rolls are contacted gently with calibration coupon, and can twitch back and forth;
(2) mill data is controlled: main fast 400 ± 10r/min, auxiliary fast 600 ~ 800r/min, rate of bending 14 ~ 18r/min, rolling speed 8 ~ 15 r/min, stable rolling enter pipe speed 0.8 ~ 1.5 r/min, propelling pressure 18 ~ 22kN, stable rolling exit velocity 0.9 ~ 1m/min, pusher dolly uniform motion;
(3) roll out be of a size of (46 ~ 48) x(2.4 ~ 2.8) copper pipe of mm;
(d) vertical pulling scale;
E () cleans;
F () checks warehouse-in.
2. the production technology of copper pipe for magnetic control pipe according to claim 1, is characterized in that described horizontal casting comprises the steps:
(1) select Cu-CATH-1 or standard cathode copper as batching, ensure its dry tack free before reinforced and surperficial without copper beans;
(2) melting furnace is adopted to melt, fill it up with until it and add charcoal after batching and close fire door, 450 ~ 500 DEG C of calcinings 5 ~ 7 hours before charcoal uses, prevent from entering copper liquid at adition process oxygen, charcoal cladding thickness is 100 ~ 150mm, and the smelting temperature of melting furnace is 1130 ~ 1200 DEG C; When selection standard tough cathode is for batching, the phosphor copper adding P≤6ppm carries out deoxidation;
(3) the copper water in melting furnace is proceeded to holding furnace inside holding and copper water will tightly be protected, the crystalline flake graphite adding thickness 100 ~ 150mm covers copper water surface;
(4) add in holding furnace content of rare earth be 0.010% rare earth alloy copper carry out deoxygenation and crystal grain thinning;
(5) by the wall thickness control of horizontal casting out copper pipe at 90 ± 1mm, then reduce casting speed to 240 ~ 280mm/min and continue casting 30 minutes, finally return to normal speed and adopt crystallizer to cool.
3. the production technology of copper pipe for magnetic control pipe according to claim 1, is characterized in that described milling face is by ingot casting surface scale mill off, and aligns ingot casting, the depth of cut 0.4 ~ 1.2mm.
4. the production technology of copper pipe for magnetic control pipe according to claim 1, is characterized in that described vertical pulling scale comprises the steps:
(1) wall thickness (WT max-WT the min)≤0.25mm of copper pipe after rolling is guaranteed;
(2) carry out a time stretching to the rolling copper pipe, stretch process rate is 1.2 ~ 1.8; Ensure that rolling copper pipe does not swing when vertical pulling progressive die, subtract wall thickness requirement according to the tube reducing that vertical pulling requires, stretching die is of a size of 39.65 ± 0.02mm, angle 25 ~ 30 °, floating core head size: microcephaly: 35.95 ± 0.02 mm, major part: 40.7 ± 0.02mm, angle 26 ~ 30 °.
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| CN201310011935.5A CN103042366B (en) | 2013-01-14 | 2013-01-14 | Manufacturing technique for copper pipes for magnetrons |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104707876A (en) * | 2014-12-16 | 2015-06-17 | 特能传热科技（中山）有限公司 | Technology for making copper tube used for magnetron anode tube |
| CN105149407A (en) * | 2015-09-17 | 2015-12-16 | 特能传热科技（中山）有限公司 | Manufacturing technology for high-purity oxygen-free copper bar for producing magnetron |
| CN117340333B (en) * | 2023-12-04 | 2024-02-13 | 常州润来科技有限公司 | Self-checking copper pipe surface milling device and detection method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2814493C3 (en) * | 1978-03-31 | 1980-12-18 | Mannesmann Ag, 4000 Duesseldorf | Cross rolling mill |
| RU2046688C1 (en) * | 1993-04-02 | 1995-10-27 | Акционерное общество "Электростальский завод тяжелого машиностроения" | Stand of the planetary mill of helical rolling |
| JP2002263757A (en) * | 2001-03-06 | 2002-09-17 | Yokohama Kiko Techno Kk | Rotary swaging machine |
| CN100383796C (en) * | 2005-12-02 | 2008-04-23 | 中国科学院金属研究所 | Copper-alloy pipe-material casting-milling technology parameter designing and optimizing method |
| CN100566916C (en) * | 2005-12-13 | 2009-12-09 | 金龙精密铜管集团股份有限公司 | The manufacture method of copper or copper alloy tube |
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Denomination of invention: Production process of copper tube for magnetron tube Effective date of registration: 20221024 Granted publication date: 20150408 Pledgee: Agricultural Bank of China Limited Changsha Wangcheng District sub branch Pledgor: HUNAN C-KINGDOM INTERNATIONAL COPPER Co.,Ltd. Registration number: Y2022430000093 |