CN107538186A - A kind of production technology of up-drawing method thin-walled light copper pipe - Google Patents
A kind of production technology of up-drawing method thin-walled light copper pipe Download PDFInfo
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- CN107538186A CN107538186A CN201710879524.6A CN201710879524A CN107538186A CN 107538186 A CN107538186 A CN 107538186A CN 201710879524 A CN201710879524 A CN 201710879524A CN 107538186 A CN107538186 A CN 107538186A
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Abstract
A kind of production technology of disclosed up-drawing method thin-walled light copper pipe, comprises the following steps：Electrolysis copper weld pool → continuous up-casting oxygen-free copper pipe → tube rolling → disk is drawn → cleans after-combustion → annealing → drawing.A kind of production technology of up-drawing method thin-walled light copper pipe provided by the invention.This method production copper pipe bus scale error it is small, conductance is high, thermal diffusivity is good, mechanical performance is strong, its copper content >=99.99%, oxygen content≤10PPM, scale error≤± 0.05m, conductance >=100%IACS.
Description
Technical field
The present invention relates to a kind of production technology of copper pipe, more particularly to a kind of production work of up-drawing method thin-walled light copper pipe
Skill.
Background technology
With electrically and air conditioner industry high speed development, requirement to electric wire and air-conditioning tubing products also more and more higher.
Traditional copper pipe production method-extrusion is to be squeezed into pipe by continuous casting solid strand, then is processed into tubing by drawing.This
The method cycle length, complex process, product cost that kind produces copper pipe are high.Draw cast tube base using up-drawing method to have the characteristics that, manage
The radial direction crystal grain distribution uniformity of base is preferable, and proportion of equiaxed grain is higher, therefore upper draft tube base is both adapted to cold working, is more suitable for heat
Processing；Pipe length is arbitrarily cut, and metal loss is small, and equipment manufacturing cost, energy consumption, operating environment, mould consumption etc. are more
It is superior.
The content of the invention
It is an object of the invention to provide a kind of production technology of up-drawing method thin-walled light copper pipe, utilizes this method production
Copper pipe cost energy consumption is small, and lumber recovery is high, precision height and excellent performance.
The technical scheme is that：A kind of production technology of up-drawing method thin-walled light copper pipe, comprises the following steps：
A, copper raw material melting：Copper raw material is added in melting furnace, and in charcoal thick surface covering 100-150mm, control melting
In-furnace temperature is xx so that copper raw material melts completely, and is communicated under self gravitation effect in holding furnace, controls in holding furnace
Temperature is 1150 ± 10 DEG C；
B, continuous up-casting oxygen-free copper pipe：After liquid level reaches specified location in holding furnace, copper liquid in holding furnace is introduced into crystallizer
Interior formation copper base, it is 20-25 DEG C, cooling water pressure 1.0-1.2MPa to control in crystallizer cooling water temperature, the copper base of formation by
The control of dummy ingot machine is drawn, stopped, drawing, stopping do action and constantly pull out to form continuous copper pipe, and wherein throwing distance is 8mm, throwing institute
With time 2.4s, casting speed 4.9mm/s, dwell time 1.20s, average casting speed is 2.22mm/s；
C, cut：The copper tube billet for drawing to obtain in step b is entered into the horizontal stand with horizontal guide wheel after the guide wheel of bending,
According to production requirement, equidistantly cut by cutter device；
D, tube rolling：Single copper pipe after step c is cut is sent into pipe mill the semi-finished product pipe for being back and forth rolled into 42*2.1mm,
Then coiling winding is carried out to semi-finished product copper pipe, wherein the feed of feeder is 5mm/ time, copper pipe thickness deviation is ±
0.05m；
E, disk is drawn：Semi-finished product copper pipe after step d is rolled is sent into plate drawing machine, by the rolling of 10 passages, passage extension system
Number is 1.3 ~ 1.45；
F, after-combustion is cleaned：Cleaning agent and sponge ball are added in copper pipe after being drawn to step e disks, connection high pressure nitrogen carries out internal blow
Clear away and wash, by cleaning agent to being cleaned outside copper pipe, then to carrying out winding packing after copper pipe aligning and metering, wherein high
The pressure value for pressing nitrogen purging is 6-8MPa, rolling speed 20-30m/min；
G, anneal：Copper pipe after step f is packed rolls into well annealing furnace, at purity is annealing in 99.95% nitrogen atmosphere
Reason, it is 280-310 DEG C to control annealing temperature, annealing time 120min；
H, finished product detection and packaging：Step g annealing after copper pipe re-start the after-combustion of falling disk to corresponding drum, and carry out into
Product examine survey physical dimension meets the requirements and elongation percentage reaches 30%, and tensile strength reaches 230MPa, after oxygen content is not more than 10PPM,
Packaging and storage.
Charcoal is to dry charcoal in the step a, and sulfur content is less than 0.5%.
Copper raw material is cathode copper and red copper waste material in the step a, and it is 70-75% that cathode copper, which accounts for percentage by weight, and purple
It is 25-30% that copper junk, which accounts for percentage by weight,.
A kind of production technology of up-drawing method thin-walled light copper pipe, for preparing with female thin-walled light copper pipe, bag
Include following steps：
A, copper raw material melting：Copper raw material is added in melting furnace, and in charcoal thick surface covering 100-150mm, control melting
In-furnace temperature is xx so that copper raw material melts completely, and is communicated under self gravitation effect in holding furnace, controls in holding furnace
Temperature is 1150 ± 10 DEG C；
B, continuous up-casting oxygen-free copper pipe：After liquid level reaches specified location in holding furnace, copper liquid in holding furnace is introduced into crystallizer
Interior formation copper base, it is 20-25 DEG C, cooling water pressure 1.0-1.2MPa to control in crystallizer cooling water temperature, the copper base of formation by
The control of dummy ingot machine is drawn, stopped, drawing, stopping do action and constantly pull out to form continuous copper pipe, and wherein throwing distance is 8mm, throwing institute
With time 2.4s, casting speed 4.9mm/s, dwell time 1.20s, average casting speed is 2.22mm/s；
C, cut：The copper tube billet for drawing to obtain in step b is entered into the horizontal stand with horizontal guide wheel after the guide wheel of bending,
According to production requirement, equidistantly cut by cutter device；
D, tube rolling：Single copper pipe after step c is cut is sent into pipe mill the semi-finished product pipe for being back and forth rolled into 42*2.1mm,
Then coiling winding is carried out to semi-finished product copper pipe, wherein the feed of feeder is 5mm/ time, copper pipe thickness deviation is ±
0.05m；
E, disk is drawn：Semi-finished product copper pipe after step d is rolled is sent into plate drawing machine, by the rolling of 10 passages, passage extension system
Number is 1.3 ~ 1.45；
F, inner wall washing：Copper pipe after disk is drawn carries out inner wall washing；
G, online annealing：Copper pipe after cleaning is sent into online annealing device and carries out online annealing, control the voltage of annealing to be
350-450V, annealing rate 40-60m/min；
H, forming internal threads：Pipe after part annealing is sent into internal thread forming machine, and progress internal thread rotation is molded, is managed after shaping
Base size is 9.2*0.23+0.1mm；
I, after-combustion is cleaned：Cleaning agent and sponge ball are added in female copper pipe to having, connection high pressure nitrogen carries out internal blow
Clear away and wash, by cleaning agent to being cleaned outside copper pipe, the pressure value of wherein high pressure nitrogen purging is 6-8MPa, rolling speed
For 20-30m/min；
J, well formula is annealed：Then the copper pipe after cleaning is sent into well annealing furnace, is to be annealed in 99.95% nitrogen atmosphere in purity
Processing, it is 280-310 DEG C to control annealing temperature, annealing time 120min；
K, finished product detection and packaging：Step j annealing after copper pipe re-start the after-combustion of falling disk to corresponding drum, and carry out into
Product examine survey physical dimension meets the requirements and elongation percentage reaches 30%, and tensile strength reaches 230MPa, after oxygen content is not more than 10PPM,
Packaging and storage.
Charcoal is to dry charcoal in the step a, and sulfur content is less than 0.5%.
Copper raw material is cathode copper and red copper waste material in the step a, and it is 70-75% that cathode copper, which accounts for percentage by weight, and purple
It is 25-30% that copper junk, which accounts for percentage by weight,.
Beneficial effect：A kind of production technology of disclosed up-drawing method thin-walled light copper pipe, is given birth to using this method
The copper pipe cost energy consumption of production is small, and lumber recovery is high, precision height and excellent performance.
Embodiment
Below in conjunction with specific embodiment, clear, complete description is carried out to technical scheme.
A kind of production technology of disclosed up-drawing method thin-walled light copper pipe, comprises the following steps：
A, copper raw material melting：From cathode copper and red copper waste material as copper raw material, it is 70- that wherein cathode copper, which accounts for percentage by weight,
75%, and it is 25-30% that red copper waste material, which accounts for percentage by weight, and copper raw material is added in melting furnace, and cover 100-150mm on surface
Thick drying charcoal, its sulfur content are less than 0.5%, and it is xx to control melting in-furnace temperature so that and copper raw material melts completely, and certainly
It is communicated under body Action of Gravity Field in holding furnace, it is 1150 ± 10 DEG C to control insulation in-furnace temperature；
B, continuous up-casting oxygen-free copper pipe：After liquid level reaches specified location in holding furnace, copper liquid in holding furnace is introduced into crystallizer
Interior formation copper base, it is 20-25 DEG C, cooling water pressure 1.0-1.2MPa to control in crystallizer cooling water temperature, the copper base of formation by
The control of dummy ingot machine is drawn, stopped, drawing, stopping do action and constantly pull out to form continuous copper pipe, and wherein throwing distance is 8mm, throwing institute
With time 2.4s, casting speed 4.9mm/s, dwell time 1.20s, average casting speed is 2.22mm/s；
C, cut：The copper tube billet for drawing to obtain in step b is entered into the horizontal stand with horizontal guide wheel after the guide wheel of bending,
According to production requirement, equidistantly cut by cutter device；
D, tube rolling：Single copper pipe after step c is cut is sent into pipe mill the semi-finished product pipe for being back and forth rolled into 42*2.1mm,
Then coiling winding is carried out to semi-finished product copper pipe, wherein the feed of feeder is 5mm/ time, copper pipe thickness deviation is ±
0.05m；
E, disk is drawn：Semi-finished product copper pipe after step d is rolled is sent into plate drawing machine, by the rolling of 10 passages, passage extension system
Number is 1.3 ~ 1.45；
F, after-combustion is cleaned：Cleaning agent and sponge ball are added in copper pipe after being drawn to step e disks, connection high pressure nitrogen carries out internal blow
Clear away and wash, by cleaning agent to being cleaned outside copper pipe, then to carrying out winding packing after copper pipe aligning and metering, wherein high
The pressure value for pressing nitrogen purging is 6-8MPa, rolling speed 20-30m/min；
G, anneal：Copper pipe after step f is packed rolls into well annealing furnace, at purity is annealing in 99.95% nitrogen atmosphere
Reason, it is 280-310 DEG C to control annealing temperature, annealing time 120min；
H, finished product detection and packaging：Step g annealing after copper pipe re-start the after-combustion of falling disk to corresponding drum, and carry out into
Product examine survey physical dimension meets the requirements and elongation percentage reaches 30%, and tensile strength reaches 230MPa, after oxygen content is not more than 10PPM,
Packaging and storage.
A kind of production technology of up-drawing method thin-walled light copper pipe, for preparing with female thin-walled light copper pipe, bag
Include following steps：
A, copper raw material melting：From cathode copper and red copper waste material as copper raw material, it is 70- that wherein cathode copper, which accounts for percentage by weight,
75%, and it is 25-30% that red copper waste material, which accounts for percentage by weight, and copper raw material is added in melting furnace, and cover 100-150mm on surface
Thick drying charcoal, its sulfur content are less than 0.5%, and it is xx to control melting in-furnace temperature so that and copper raw material melts completely, and certainly
It is communicated under body Action of Gravity Field in holding furnace, it is 1150 ± 10 DEG C to control insulation in-furnace temperature；
B, continuous up-casting oxygen-free copper pipe：After liquid level reaches specified location in holding furnace, copper liquid in holding furnace is introduced into crystallizer
Interior formation copper base, it is 20-25 DEG C, cooling water pressure 1.0-1.2MPa to control in crystallizer cooling water temperature, the copper base of formation by
The control of dummy ingot machine is drawn, stopped, drawing, stopping do action and constantly pull out to form continuous copper pipe, and wherein throwing distance is 8mm, throwing institute
With time 2.4s, casting speed 4.9mm/s, dwell time 1.20s, average casting speed is 2.22mm/s；
C, cut：The copper tube billet for drawing to obtain in step b is entered into the horizontal stand with horizontal guide wheel after the guide wheel of bending,
According to production requirement, equidistantly cut by cutter device；
D, tube rolling：Single copper pipe after step c is cut is sent into pipe mill the semi-finished product pipe for being back and forth rolled into 42*2.1mm,
Then coiling winding is carried out to semi-finished product copper pipe, wherein the feed of feeder is 5mm/ time, copper pipe thickness deviation is ±
0.05m；
E, disk is drawn：Semi-finished product copper pipe after step d is rolled is sent into plate drawing machine, by the rolling of 10 passages, passage extension system
Number is 1.3 ~ 1.45；
F, inner wall washing：Copper pipe after disk is drawn carries out inner wall washing；
G, online annealing：Copper pipe after cleaning is sent into online annealing device and carries out online annealing, control the voltage of annealing to be
350-450V, annealing rate 40-60m/min；
H, forming internal threads：Pipe after part annealing is sent into internal thread forming machine, and progress internal thread rotation is molded, is managed after shaping
Base size is 9.2*0.23+0.1mm；
I, after-combustion is cleaned：Cleaning agent and sponge ball are added in female copper pipe to having, connection high pressure nitrogen carries out internal blow
Clear away and wash, by cleaning agent to being cleaned outside copper pipe, the pressure value of wherein high pressure nitrogen purging is 6-8MPa, rolling speed
For 20-30m/min；
J, well formula is annealed：Then the copper pipe after cleaning is sent into well annealing furnace, is to be annealed in 99.95% nitrogen atmosphere in purity
Processing, it is 280-310 DEG C to control annealing temperature, annealing time 120min；
K, finished product detection and packaging：Step j annealing after copper pipe re-start the after-combustion of falling disk to corresponding drum, and carry out into
Product examine survey physical dimension meets the requirements and elongation percentage reaches 30%, and tensile strength reaches 230MPa, after oxygen content is not more than 10PPM,
Packaging and storage.
One embodiment of the invention is described in detail above, but the content is only the invention
Preferred embodiment, it is impossible to be considered as the practical range for limiting the invention.It is all to be made according to the invention application range
Equivalent change with improve etc., belong within the patent covering scope of the invention.
Claims (6)
1. a kind of production technology of up-drawing method thin-walled light copper pipe, it is characterised in that comprise the following steps：
A, copper raw material melting：Copper raw material is added in melting furnace, and in charcoal thick surface covering 100-150mm, control melting
In-furnace temperature is xx so that copper raw material melts completely, and is communicated under self gravitation effect in holding furnace, controls in holding furnace
Temperature is 1150 ± 10 DEG C；
B, continuous up-casting oxygen-free copper pipe：After liquid level reaches specified location in holding furnace, copper liquid in holding furnace is introduced into crystallizer
Interior formation copper base, it is 20-25 DEG C, cooling water pressure 1.0-1.2MPa to control in crystallizer cooling water temperature, the copper base of formation by
The control of dummy ingot machine is drawn, stopped, drawing, stopping do action and constantly pull out to form continuous copper pipe, and wherein throwing distance is 8mm, throwing institute
With time 2.4s, casting speed 4.9mm/s, dwell time 1.20s, average casting speed is 2.22mm/s；
C, cut：The copper tube billet for drawing to obtain in step b is entered into the horizontal stand with horizontal guide wheel after the guide wheel of bending,
According to production requirement, equidistantly cut by cutter device；
D, tube rolling：Single copper pipe after step c is cut is sent into pipe mill the semi-finished product pipe for being back and forth rolled into 42*2.1mm,
Then coiling winding is carried out to semi-finished product copper pipe, wherein the feed of feeder is 5mm/ time, copper pipe thickness deviation is ±
0.05m；
E, disk is drawn：Semi-finished product copper pipe after step d is rolled is sent into plate drawing machine, by the rolling of 10 passages, passage extension system
Number is 1.3 ~ 1.45；
F, after-combustion is cleaned：Cleaning agent and sponge ball are added in copper pipe after being drawn to step e disks, connection high pressure nitrogen carries out internal blow
Clear away and wash, by cleaning agent to being cleaned outside copper pipe, then to carrying out winding packing after copper pipe aligning and metering, wherein high
The pressure value for pressing nitrogen purging is 6-8MPa, rolling speed 20-30m/min；
G, anneal：Copper pipe after step f is packed rolls into well annealing furnace, at purity is annealing in 99.95% nitrogen atmosphere
Reason, it is 280-310 DEG C to control annealing temperature, annealing time 120min；
H, finished product detection and packaging：Step g annealing after copper pipe re-start the after-combustion of falling disk to corresponding drum, and carry out into
Product examine survey physical dimension meets the requirements and elongation percentage reaches 30%, and tensile strength reaches 230MPa, after oxygen content is not more than 10PPM,
Packaging and storage.
2. the production technology of up-drawing method thin-walled light copper pipe according to claim 1, it is characterised in that：In the step a
Charcoal is to dry charcoal, and sulfur content is less than 0.5%.
3. the production technology of up-drawing method thin-walled light copper pipe according to claim 1, it is characterised in that：In the step a
Copper raw material is cathode copper and red copper waste material, and it is 70-75% that cathode copper, which accounts for percentage by weight, and red copper waste material accounts for percentage by weight
For 25-30%.
4. a kind of production technology of up-drawing method thin-walled light copper pipe, for preparing with female thin-walled light copper pipe, it is special
Sign is to comprise the following steps：
A, copper raw material melting：Copper raw material is added in melting furnace, and in charcoal thick surface covering 100-150mm, control melting
In-furnace temperature is xx so that copper raw material melts completely, and is communicated under self gravitation effect in holding furnace, controls in holding furnace
Temperature is 1150 ± 10 DEG C；
B, continuous up-casting oxygen-free copper pipe：After liquid level reaches specified location in holding furnace, copper liquid in holding furnace is introduced into crystallizer
Interior formation copper base, it is 20-25 DEG C, cooling water pressure 1.0-1.2MPa to control in crystallizer cooling water temperature, the copper base of formation by
The control of dummy ingot machine is drawn, stopped, drawing, stopping do action and constantly pull out to form continuous copper pipe, and wherein throwing distance is 8mm, throwing institute
With time 2.4s, casting speed 4.9mm/s, dwell time 1.20s, average casting speed is 2.22mm/s；
C, cut：The copper tube billet for drawing to obtain in step b is entered into the horizontal stand with horizontal guide wheel after the guide wheel of bending,
According to production requirement, equidistantly cut by cutter device；
D, tube rolling：Single copper pipe after step c is cut is sent into pipe mill the semi-finished product pipe for being back and forth rolled into 42*2.1mm,
Then coiling winding is carried out to semi-finished product copper pipe, wherein the feed of feeder is 5mm/ time, copper pipe thickness deviation is ±
0.05m；
E, disk is drawn：Semi-finished product copper pipe after step d is rolled is sent into plate drawing machine, by the rolling of 10 passages, passage extension system
Number is 1.3 ~ 1.45；
F, inner wall washing：Copper pipe after disk is drawn carries out inner wall washing；
G, online annealing：Copper pipe after cleaning is sent into online annealing device and carries out online annealing, control the voltage of annealing to be
350-450V, annealing rate 40-60m/min；
H, forming internal threads：Pipe after part annealing is sent into internal thread forming machine, and progress internal thread rotation is molded, is managed after shaping
Base size is 9.2*0.23+0.1mm；
I, after-combustion is cleaned：Cleaning agent and sponge ball are added in female copper pipe to having, connection high pressure nitrogen carries out internal blow
Clear away and wash, by cleaning agent to being cleaned outside copper pipe, the pressure value of wherein high pressure nitrogen purging is 6-8MPa, rolling speed
For 20-30m/min；
J, well formula is annealed：Then the copper pipe after cleaning is sent into well annealing furnace, is to be annealed in 99.95% nitrogen atmosphere in purity
Processing, it is 280-310 DEG C to control annealing temperature, annealing time 120min；
K, finished product detection and packaging：Step j annealing after copper pipe re-start the after-combustion of falling disk to corresponding drum, and carry out into
Product examine survey physical dimension meets the requirements and elongation percentage reaches 30%, and tensile strength reaches 230MPa, after oxygen content is not more than 10PPM,
Packaging and storage.
5. the production technology of up-drawing method thin-walled light copper pipe according to claim 4, it is characterised in that：In the step a
Charcoal is to dry charcoal, and sulfur content is less than 0.5%.
6. the production technology of up-drawing method thin-walled light copper pipe according to claim 4, it is characterised in that：In the step a
Copper raw material is cathode copper and red copper waste material, and it is 70-75% that cathode copper, which accounts for percentage by weight, and red copper waste material accounts for percentage by weight
For 25-30%.
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| CN108673059A (en) * | 2018-04-27 | 2018-10-19 | 海亮（安徽）铜业有限公司 | A kind of moulding process of efficient copper tube |
| CN109127770A (en) * | 2018-08-21 | 2019-01-04 | 佛山市顺德区精艺万希铜业有限公司 | Mosquito-repellent incense type dissipates greatly disk production method and system |
| CN109127844A (en) * | 2018-08-21 | 2019-01-04 | 冯境铭 | Pipes processing method and system |
| CN109813172A (en) * | 2019-03-18 | 2019-05-28 | 青岛登辉机械配件有限公司 | Inner screw thread copper pipe and its processing technology |
| CN109986306A (en) * | 2019-04-10 | 2019-07-09 | 广东海亮铜业有限公司 | It is a kind of to dissipate rosette copper pipe and its production technology greatly |
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