CN100448597C - Cupronickel condensation tube production process using disk stretch - Google Patents
Cupronickel condensation tube production process using disk stretch Download PDFInfo
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- CN100448597C CN100448597C CNB2004100605496A CN200410060549A CN100448597C CN 100448597 C CN100448597 C CN 100448597C CN B2004100605496 A CNB2004100605496 A CN B2004100605496A CN 200410060549 A CN200410060549 A CN 200410060549A CN 100448597 C CN100448597 C CN 100448597C
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Abstract
The present invention provides a technologic method using disk stretch to manufacture a cupronickel condensing tube, the manufacturing technology of which mainly comprises casting->saw cutting->extrusion->saw cutting->leveling->tube rolling->drawing/rewinding->annealing->packing, wherein a stretch process adopts multi-track circular disk stretch, an extended coefficient is controlled between 1.30 and 1.45, the inner and outer mould oil kinematic viscosity of a drawing process is from 400 to 900mm< 2 >/s (40 DEG), THE internal mould oil kinematic viscosity is from 2800 to 3600mm< 2 >/s (40 DEG), a mould angle of a stretching mould is from 9 to 12 DEG, the taper of a sliding core head is from 6 to 9 DEG, and the angular difference of the stretching mould and the sliding core head is from 1 to 3 DEG. A disk stretch method is adopted in the technologic method provided by the present invention can realize the continuous drawing of the cupronickel condensing tube, the productive efficiency is greatly improved, shaft line rolled cupronickel condensing tube products in the shapes of straight strips and mosquito incense disks and with the length of hundreds of meters even thousands of meters can be manufactured by adopting the method, and the present invention better meets the length requirement of markets to the cupronickel condensing tube.
Description
Affiliated technical field
The present invention relates to the nonferrous materials processing technique field, mainly propose a kind of dish that utilizes and draw the process of making white copper condenser tube.
Background technology
The white copper condenser tube product is a kind of corronil, is called as copper-nickel alloy because of presenting white.Because it has good anti-corrosion and sea water resistance performance, chemical composition stability is so be widely used in firepower and nuclear electric power generation and the boats and ships heat exchanger with condenser, feed-water heater, distiller, oil cooler, distilled water device.Market prospects are very wide, and supply falls short of demand for product.
The common process using of existing white copper condenser tube production: founding → sawing → extruding → sawing → pickling → rolling → scale sawing → vertical bar stretching (pony-roughing pass) → scale → sawing → eddy current inspection → technologies such as annealing → enlacement packaging.The existing manufacturing technique flow process is comparatively complicated.What extruding was used is no water seal extruding, and must adopt pickling to remove the oxide skin that the pipe surface produces after the extruding, after rolling in addition, because the restriction of its follow-up equipment, rolling material cuttolength must be stretched for the vertical bar stretching-machine, and in drawing process, each root vertical bar and each passage all need heavy replicating head and stretching, after promptly whenever being stretched to a specification vertical bar, need make head once more, be stretched to the vertical bar of next specification again, the white copper condenser tube of especially little caliber, because the stretching passage increases, process is more loaded down with trivial details, and can only produce≤the vertical bar condenser pipe of 18M, and increase handling process again, therefore existing manufacturing technique method efficient is extremely low, does not satisfy market far away and requires length longer to white copper condenser tube, the growth requirement that precision is higher.
Summary of the invention
The objective of the invention is to propose a kind of dish that utilizes and draw the process of making white copper condenser tube, to realize the continuously elongated of white copper condenser tube, enhance productivity, and realize producing the white copper condenser tube product that diameter length little, that precision is high, cost is low, technology is easy reaches hundreds of rice even goes up km.
Process proposed by the invention is: its production technology mainly comprises: founding → sawing → extruding → sawing → aligning → tube rolling → dish draws → drawing/rewinding → annealing → packing; Wherein, drawing process adopts the multi-pass disk to stretch, and lengthening coefficient is controlled between 1.30～1.45, drawing process China and foreign countries moulding oil kinematic viscosity: 400～900mm
2/ s (40 ℃), interior moulding oil kinematic viscosity: 2800～3600mm
2/ s (40 ℃); 9 °～12 ° of stretching die modular angles, the floating core head tapering: 6 °～9 °, drawing-die angle and floating core head differential seat angle are 1 °～3 °.
When the present invention produces axis web-like white copper condenser tube, carrying out using re-reeler to carry out curling once more making it to become the axis web-like after the multi-pass dish draws.
When the present invention produces vertical bar shape white copper condenser tube, carrying out carrying out the vertical bar drawing after the multi-pass dish draws, last passage is implemented the stretching of band working modulus, lengthening coefficient is controlled between 1.30～1.40, the bending stress that elimination tubing produces on plate drawing machine after stretching with assurance and the glacing flatness of tubing.
When the present invention produces mosquito-repellent incense plate-like white copper condenser tube, carrying out carrying out the vertical bar drawing after the multi-pass dish draws, to the stretching that last passage implements to be with working modulus, lengthening coefficient is controlled between 1.30～1.40, utilizes the crimping device of attaching troops to a unit at associating drawbench rear portion to be curled into the mosquito-repellent incense plate-like again.
Adopt water seal decortication mode in the extrusion process of the present invention, be about to mould outlet and link to each other, the pipe of extruding is directly entered in the tank cool off fast, can prevent the pipe surface oxidation with tank, and the crystal grain of refinement control pipe.
The product scale scope of the axis volume that process of the present invention is produced: the specification limit of φ 4～φ 22.23X0.4～1.5mm, vertical bar product: φ 4～φ 25X0.4～2mm; The specification limit of mosquito repellent coil disc product: φ 4～φ 19.05X0.4～1.5mm, its dimensional tolerance meets GB GB8890-88 or U.S. mark ASTM B111 requirement; Soft attitude annealing performance satisfies: Rm 〉=290Mpa .Rp0.2 〉=90MPa, A 〉=30%, HV0.3:75～105, or above-mentioned standard-required.
In the process of the present invention, founding: use centreless or channel induction furnace to carry out the melting and casting ingot blank, casting temperature: 1250～1320 ℃, casting speed: 2.5～3.5m/h, its chemical composition meets GB5234-2001.Extruding: the heating-up temperature of extrusion process: 920～1000 ℃, extrusion speed: 35～50mm/s, extrusion ratio: 21, press surplus thickness: 25～40mm.The ingot casting of heating is pushed in the extruder recipient, extrusion axis extrudes ingot casting and flows out through mould outlet, and mould outlet links to each other with a water-filled tank, and the pipe of extruding directly enters in the tank and cools off fast, can prevent the pipe surface oxidation, and refinement extrudes the crystal grain of pipe; Carry out the ingot casting decortication when extruding, decortication thickness can reach 0.5～1.5mm.Eject in the recipient again after to be extruded the finishing extruding copper sheet, press surplusly, fall into ash can.Rolling: as to adopt pipe mill and supporting plug to be rolled, rolling feed: 5～9mm, normal mill speed: 120～145 strokes/min, lengthening coefficient: 7.7～8.4.Dish draws: adopt multi-pass to coil and draw, look passage in the drawing process and adopt different lengthening coefficient, lengthening coefficients to be controlled between 1.30～1.45; Every time adopts the stretching die of different size and the floating core head of different size, and moulding oil kinematic viscosity: 400～900mm outside using in drawing process
2/ s (40 ℃), interior moulding oil kinematic viscosity: 2800～3600mm
2/ s (40 ℃).Inside and outside moulding oil viscosity is crossed the young pathbreaker and is caused the film strength deficiency, and tube surfaces scratches, jumps defectives such as car; The sticking oil of excessive then tube surfaces, easy-clear can't not guarantee the tube surfaces cleannes.The modular angle of stretching die: 9 °～12 °, the floating core head tapering: 6 °～9 °, the differential seat angle of stretching die and floating core head is 1 °～3 °.Drawing: uniting on the drawbench the vertical bar pipe drawing of last passage when producing vertical bar shape white copper condenser tube or mosquito-repellent incense plate-like condenser pipe with working modulus, elongation control is between 1.30～1.40, normal drawing speed: 10～100m/min, and onlinely carry out eddy current inspection, guarantee that finally vertical bar shape white copper condenser tube or mosquito-repellent incense plate-like condenser pipe meet the requirements of the customers.Rewinding: when producing axis web-like white copper condenser tube, use re-reeler to carry out rewinding and be curled into the axis web-like, draw off rate: 300～400m/min, and onlinely carry out eddy current inspection, roll up wide: 205mm, roll up external diameter＜1100mm.Annealing: adopt bright annealing furnace to carry out the finished product bright annealing.The annealing process heating-up temperature: 600～700 ℃, roller speed: 110～130mm/min, temperature retention time: 100～130min.
In the process that the present invention proposes, take dish to draw the method for doing, can realize the continuously elongated of white copper condenser tube, improved production efficiency greatly, adopt this method can produce the axis web-like white copper condenser tube product that vertical bar shape or mosquito-repellent incense plate-like and length can reach hundreds of rice even go up km, satisfy the requirement of market better the copper-nickel alloy condensation section length.It all need make head after Pan Lazhong has avoided each drawing in the existing vertical bar drawing method, promptly each root vertical bar and passage all need the loaded down with trivial details technical process of heavy replicating head, have reduced process treatment process, have further reduced production cost.
Process of the present invention adopts the processing mode of water seal decortication in extrusion process, the oxide skin that must adopt pickling to remove the generation of pipe surface with pipe in the existing technology compares, and has reduced process treatment process, has further guaranteed product quality.
Description of drawings
Accompanying drawing is technological process of production figure of the present invention.
The specific embodiment
The embodiment that provides is in conjunction with the accompanying drawings further specified the present invention:
Embodiment 1:
A kind of soft attitude B10 axis web-like white copper condenser tube, specification: φ 10X0.6mm, mean outside diameter permissible variation ± 0.05mm, wall thickness permissible variation ± 0.05mm, Rp0.2:90～105Mpa, Rm 〉=290Mpa, A 〉=30% is rolled up heavy 80～120Kg/ volume, and the every volume of defect point is below 5.
1. founding: the ingot casting that is cast as φ 245mm specification.Use coreless induction furnace to carry out founding, casting temperature: 1250 ℃, casting speed: 2.5m/h, its chemical composition meets GB5234-2001.
2. extruding: the pipe that extrudes into φ 80X10mm.Use extruder and supporting plug to push, adopt water seal decortication mode in the extrusion process; The ingot casting of heating is pushed in the extruder recipient, extrusion axis extrudes ingot casting and flows out through mould outlet, and mould outlet links to each other with a water-filled tank, and the pipe of extruding directly enters in the tank and cools off fast, can prevent the pipe surface oxidation, and refinement extrudes the crystal grain of pipe; Carry out the ingot casting decortication when extruding, decortication thickness can reach 0.5mm.Eject in the recipient again after to be extruded the finishing extruding copper sheet, press surplusly, fall into ash can.The heating-up temperature of extrusion process: 920 ℃, extrusion speed: 35mm/s, extrusion ratio: 21, press surplus thickness: 25mm.
3. sawing: use sawing machine to cut off end to end.
4. align: use the straightener aligning.
5. rolling: as to use pipe mill to be rolled into φ 39X2.5mm with supporting plug.Feed: 8mm, normal mill speed: 120 strokes/min, lengthening coefficient: 7.7.
6. dish draws: adopt inverted plate drawing machine to carry out 8 passage dishes and draw, 1 passage lengthening coefficient 1.38,2 passage lengthening coefficients 1.41,3 passage lengthening coefficients 1.45,4 passage lengthening coefficients, 1.45,5 passage lengthening coefficients, 1.45,6 passage lengthening coefficients 1.40,7 passage lengthening coefficients, 1.44,8 passage lengthening coefficients 1.36; Be stretched to finished product φ 10X0.6mm, every time adopts the drawing-die of different size and the floating core head of different size, and moulding oil kinematic viscosity: 400mm outside using in drawing process
2/ s (40 ℃), interior moulding oil kinematic viscosity: 2800mm
2/ s (40 ℃), the stretching die modular angle: 12 °, floating core head tapering: 9 °.
7. rewinding: adopt re-reeler to coil into the axis volume once more.Coiling speed: 300m/min, and onlinely carry out eddy current inspection, roll up wide: 205mm, volume external diameter＜1100mm.
8. annealing: adopt bright annealing furnace to carry out the finished product bright annealing.Annealing process is a heating-up temperature: 650 ℃, and roller speed: 120mm/min, finally detect performance and be: Rm 〉=290Mpa, Rp0.2 〉=90Mpa, A 〉=30%, HV0.3:100 satisfies customer requirement fully.
9. pack: the use packing machine according to the contract carries out finished product packing and delivers.
Embodiment 2:
A kind of hard attitude B10 vertical bar shape white copper condenser tube, specification φ 6.35X0.51mm, external diameter tolerance permissible variation ± 0.051mm, wall thickness permissible variation ± 0.038mm, Rp0.5＞240Mpa, Rm＞310Mpa, glacing flatness＜12mm/3000mm.
1. founding: the ingot casting that is cast as φ 245mm specification.Use coreless induction furnace to carry out founding, casting temperature: 1285 ℃, casting speed: 3m/h, its chemical composition meets GB5234-2001.
2. extruding: the pipe that extrudes into φ 80X10mm.Use extruder and supporting plug to push, adopt the mode of water seal decortication in the extrusion process, with embodiment 1.The heating-up temperature of extrusion process: 960 ℃, extrusion speed: 42mm/s, extrusion ratio: 21, press surplus thickness: 32mm.
3. sawing: use sawing machine to cut off end to end.
4. align: the usage level aligning.
5. rolling: as to use pipe mill to be rolled into φ 39X2.5mm with supporting plug.Feed: 8mm, normal mill speed: 132 strokes/min, lengthening coefficient: 7.7.
6. dish draws: adopt inverted plate drawing machine to carry out 9 passage dishes and draw, 1 passage stretching lengthening coefficient is 1.38,2 passage stretching lengthening coefficients are 1.41,3 passage stretching lengthening coefficients are 1.45,4 passage stretching lengthening coefficients are 1.45,5 passage stretching lengthening coefficients are 1.45,6 passage stretching lengthening coefficients are 1.38,7 passage stretching lengthening coefficients are 1.37,8 passage stretching lengthening coefficients are 1.34,9 passage stretching lengthening coefficients are 1.41, and every time adopts the drawing-die of different size and the floating core head of different size, and moulding oil kinematic viscosity: 650mm outside using in drawing process
2/ s (40 ℃), interior moulding oil kinematic viscosity: 3200mm
2/ s (40 ℃), the stretching die modular angle: 11 °, floating core head tapering: 9 °.
7. drawing: use the associating drawbench to carry out the vertical bar drawing.Promptly on the associating drawbench, last passage is implemented the stretching of band working modulus, lengthening coefficient: 1.40, eliminate the bending stress that tubing produces and the glacing flatness of tubing with the back that guarantee to stretch on plate drawing machine, normal draw speed: 50m/min, and carry out eddy current inspection, guarantee that finally the glacing flatness of tubing meets the requirements of the customers.
8. packing: tubing directly carries out the scale sawing in associating on the drawbench, deburrs to the tubing two ends are online then, and tubing falls in the storage rack and dries and directly pack, deliver after removing sawdust.Finished product meets contract requirement through final the detection.
Embodiment 3:
A kind of soft attitude B10 mosquito-repellent incense plate-like white copper condenser tube, specification φ 6.35X0.51mm, external diameter tolerance permissible variation ± 0.051mm, wall thickness permissible variation ± 0.038mm, Rp0.2:90～105Mpa, Rm＞290Mpa, A 〉=30%, mosquito repellent coil disc length are 15mm, and the length permissible variation is 0～300mm.
1. founding: the ingot casting that is cast as φ 245mm specification.Use coreless induction furnace to carry out founding, casting temperature: 1320 ℃, casting speed: 3.5m/h, its chemical composition meets GB5234-2001.
2. extruding: the pipe that extrudes into φ 80X10mm.Use extruder and supporting plug to push, adopt the mode of water seal decortication in the extrusion process, with embodiment 1.The heating-up temperature of extrusion process: 1000 ℃, extrusion speed: 50mm/s, extrusion ratio: 21, press surplus thickness: 40mm.
3. sawing: use sawing machine to cut off end to end.
4. align: use smoothing roll to align.
5. rolling: as to use pipe mill to be rolled into φ 39X2.5mm with supporting plug.Feed: 8mm, normal mill speed: 145 strokes/min, lengthening coefficient: 7.7.
6. dish draws: adopt inverted plate drawing machine to carry out 9 passage dishes and draw, 1 passage stretching lengthening coefficient is 1.38,2 passage stretching lengthening coefficients are 1.41,3 passage stretching lengthening coefficients are 1.45,4 passage stretching lengthening coefficients are 1.45,5 passage stretching lengthening coefficients are 1.45,6 passage stretching lengthening coefficients are 1.38,7 passage stretching lengthening coefficients are 1.37,8 passage stretching lengthening coefficients are 1.34,9 passage stretching lengthening coefficients are 1.41, and every time adopts the drawing-die of different size and the floating core head of different size, and moulding oil kinematic viscosity: 900mm outside using in drawing process
2/ s (40 ℃), interior moulding oil kinematic viscosity: 3600mm
2/ s (40 ℃), the stretching die modular angle: 10 °, floating core head tapering: 8 °.
7. drawing: use the associating drawbench to carry out the vertical bar drawing.I.e. stretching of on the associating drawbench, working modulus is with in last enforcement together, lengthening coefficient: 1.40, normal draw speed: 40m/min, and carry out eddy current inspection, the crimping device of finally attaching troops to a unit at connection machine drawing rear portion is curled into mosquito-repellent incense plate-like white copper condenser tube.
8. annealing: adopt bright annealing furnace to carry out the finished product bright annealing.The annealing process heating-up temperature: 650～670 ℃, roller speed: 120mm/min, finally detect performance and be: Rm＞290Mpa, Rp0.2＞90Mpa, A 〉=30%, HV0.3:95 satisfies customer requirement fully.
9. pack: the use packing machine according to the contract carries out finished product packing and delivers.
Claims (6)
1, a kind of dish that utilizes draws the process of making white copper condenser tube, and feature of the present invention is: its production technology mainly comprises: founding → sawing → extruding → sawing → aligning → tube rolling → dish draws → drawing/rewinding → annealing → packing; Wherein, dish draws drawing process to adopt the multi-pass disk to stretch, and lengthening coefficient is controlled between 1.30～1.45, kinematic viscosity: 400～900mm during 40 ℃ of drawing process China and foreign countries moulding oils
2Kinematic viscosity: 2800～3600mm when/s, 40 ℃ of interior moulding oils
2/ s, the modular angle of stretching die: 9 °～12 °, the floating core head tapering: 6 °～9 °, the differential seat angle of stretching die and floating core head is 1 °～3 °.
2, a kind of dish that utilizes according to claim 1 draws the process of making white copper condenser tube, it is characterized in that: when producing axis web-like white copper condenser tube, after carrying out the stretching of multi-pass disk, use re-reeler to carry out curling once more, curling becomes axis web-like white copper condenser tube.
3, a kind of dish that utilizes according to claim 1 draws the process of making white copper condenser tube, it is characterized in that: when producing vertical bar shape white copper condenser tube, carrying out carrying out the vertical bar drawing after the multi-pass disk stretches, last passage is implemented the stretching of band working modulus, lengthening coefficient is controlled between 1.30～1.40, after guaranteeing stretching, bending stress that elimination tubing produces on plate drawing machine and the glacing flatness that guarantees tubing.
4, a kind of dish that utilizes according to claim 1 draws the process of making white copper condenser tube, it is characterized in that: when producing mosquito-repellent incense plate-like white copper condenser tube, carrying out carrying out the vertical bar drawing after the multi-pass disk stretches, last passage is implemented the stretching of band working modulus, lengthening coefficient is controlled between 1.30～1.40, utilize the crimping device of attaching troops to a unit to curl again, be curled into mosquito-repellent incense plate-like white copper condenser tube at associating drawbench rear portion.
5, a kind of dish that utilizes according to claim 1 draws the process of making white copper condenser tube, it is characterized in that: in extrusion process, adopt water seal decortication mode, being about to mould outlet links to each other with tank, the pipe of extruding is directly entered in the tank to be cooled off fast, preventing the pipe surface oxidation, and the crystal grain of refinement control pipe.
6, a kind of dish that utilizes according to claim 1 draws the process of making white copper condenser tube, it is characterized in that: in the technology of the present invention, founding: the melting and casting ingot blank uses centreless or channel induction furnace to carry out, casting temperature: 1250～1320 ℃, casting speed: 2.5～3.5m/h, the chemical composition of ingot blank meets GB5234-2001; Extruding: adopt extruder and supporting plug to push; Tube rolling: adopt pipe mill and supporting plug to be rolled, rolling feed: 5～9mm, normal mill speed: 120～145 strokes/min, lengthening coefficient: 7.7～8.4; Disk stretches; Drawing or rewinding; Normal drawing speed: 10～100m/min, and onlinely carry out eddy current inspection; The draw off rate of rewinding: 300～400m/min, and onlinely carry out eddy current inspection, roll up wide: 205mm, volume external diameter＜1100mm; Annealing: adopt bright annealing furnace to carry out the finished product bright annealing: the annealing process heating-up temperature: 600～700 ℃, roller speed 110～130mm/min, temperature retention time: 100～130min.
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| CNB2004100605496A CN100448597C (en) | 2004-09-30 | 2004-09-30 | Cupronickel condensation tube production process using disk stretch |
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| CNB2004100605496A CN100448597C (en) | 2004-09-30 | 2004-09-30 | Cupronickel condensation tube production process using disk stretch |
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| CN100448597C true CN100448597C (en) | 2009-01-07 |
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