CN107738067A - A kind of random length half-hard state copper pipe bus production technology - Google Patents
A kind of random length half-hard state copper pipe bus production technology Download PDFInfo
- Publication number
- CN107738067A CN107738067A CN201710820736.7A CN201710820736A CN107738067A CN 107738067 A CN107738067 A CN 107738067A CN 201710820736 A CN201710820736 A CN 201710820736A CN 107738067 A CN107738067 A CN 107738067A
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- Prior art keywords
- copper pipe
- copper
- temperature
- hard state
- production technology
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/004—Copper alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
Abstract
A kind of disclosed random length half-hard state copper pipe bus production technology, 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.Pass through the improvement to annealing schedule and the control of drawing working modulus, it can obtain that scale error is small, conductance is high, the uniform half-hard state copper pipe bus of mechanical performance, its copper content >=99.99%, oxygen content≤10PPM, scale error≤± 0.05m, conductance >=99%IACS, Vickers hardness is within the scope of 80 100HV.
Description
Technical field
The present invention relates to a kind of production technology of copper pipe bus, more particularly to a kind of random length half-hard state copper pipe bus to produce
Technique.
Background technology
The high speed development of modern society be unable to do without the guarantee of electric power, and this also proposes higher to electric power correlation auxiliary products
It is required that the advantages of half-hard state copper pipe bus is in power Transmission distribution applications make it that its demand is also increasing.Traditional half
Hard state copper pipe bus production technology includes electrolysis copper weld pool → be cast into base → strand extruding → tube rolling → annealing → stretching → essence
Whole → finished products, technological process length, high energy consumption.In addition, to reach the requirement of copper pipe half-hard state, copper pipe annealing temperature needs
It is maintained within very narrow half-hard state temperature range.But traditional annealing furnace volume is larger, the protected throughput of in-furnace temperature,
The influence of charge, blower fan situation etc. and produce fluctuation, it is difficult to ensure that copper pipe temperature remains at half-hard state temperature model
Within enclosing, cause the performance of copper pipe unstable.
For problem, a kind of half-hard state copper pipe processing method of patent（Patent No. 2014106603981）It is proposed that use exists
Line annealing replaces original annealing schedule, can obtain the copper pipe bus of stable performance.But technique during line annealing practical operation
Technical sophistication, and the shortcomings that several aspects be present：（1）Online annealing speed is slow, and efficiency is low；（2）Continuous annealing furnace apparatus is in itself
It is expensive, along with energy consumption is big, cause cost higher；（3）To prevent copper pipe from aoxidizing, the stove in continuous annealing furnace is generally required
Reducibility gas, such as H are filled with chamber2, or H2With N2Mixed gas, certain explosion hazard be present, have certain
Security risk；（4）Certain lubricating oil, the not cleaned direct-on-line of lubricating oil be present in the copper pipe surfaces externally and internally drawn through plate drawing machine
Annealing, which can burn, discharges substantial amounts of smog, and has unpleasant penetrating odor, endangers employee's health, pollutes environment.
The content of the invention
To solve the above problems, the invention provides a kind of random length half-hard state copper pipe bus production technology, the producer
Method makes copper pipe reach soft state on the basis of existing equipment is not changed, by changing annealing schedule, in conjunction with drawing procedure, passes through
Drawing working modulus is controlled to obtain half-hard state copper pipe, the copper pipe bus load magnitude of current produced using this method is big, mechanical performance is uniform.
The technical scheme is that：A kind of random length half-hard state copper pipe bus production technology, specifically comprises the following steps：
A, it is electrolysed copper weld pool：Cathode copper is added in smelting furnace and carries out melting, and is to smelting furnace copper liquid surface addition thickness
100-150mm charcoal coating, it is 1140-1170 DEG C to control smelting temperature in smelting furnace, and the copper liquid in smelting furnace passes through
The chute of lower section flows to holding furnace insulation, and holding temperature is 1150-1200 DEG C, and the copper liquid surface in holding furnace uses graphite squama
Piece is as coating；
B, continuous up-casting oxygen-free copper pipe：Copper liquid in holding furnace is constantly entered into graphite crystallizer, and in the presence of cooling water
Gradually solidification, the inflow temperature for controlling graphite crystallizer are 20-25 DEG C, and leaving water temperature is 25-35 DEG C, hydraulic pressure 1.0-
1.2MPa, the copper pipe after solidification is constantly pulled out by hauling machine forms continuous copper pipe, and the lead speed for controlling hauling machine is 30-
40mm/min；
C, tube rolling：Rolling device is sent into after the copper pipe for drawing to obtain in step b is perforated by feeder back and forth to be rolled
42 × 2.1mm semi-finished product copper pipe is formed, coiling winding is then carried out to semi-finished product copper pipe, the feed of wherein feeder is
5mm/ times, copper pipe thickness deviation is ± 0.05m；
D, disk is drawn：Semi-finished product copper pipe after step c is rolled is sent into plate drawing machine, by the rolling of 4-6 passage, obtains it is expected rule
The copper pipe of lattice；
E, after-combustion is cleaned：Cleaning agent and sponge ball are added in copper pipe after being drawn to step d 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；
F, anneal：Copper pipe after step e is packed rolls into well annealing furnace, at purity is annealing in 99.95% nitrogen atmosphere
Reason obtains soft state copper pipe volume, controls heating-up time 5h, and holding temperature is 400-450 DEG C, soaking time 2h, and temperature fall time is
5h, and tapping temperature is not higher than 40 DEG C；
G, drawing：Copper pipe volume after step f annealing enters automatic hydraulic drawbench by aligning, is selected according to customer requirement corresponding
The mould of specification, drawing copper tubes are carried out by corresponding mould and obtain half-hard state copper pipe bus, then carry out cutting packaging, wherein
The drawing speed of drawbench is 15-25m/min, working modulus≤15%, needs to use drawing oil to be lubricated cooling at mould.
In the step a, cathode copper is previously placed in smelting furnace fire door baking 30min, and holding surface is clear in baking process
Clean no-sundries.
The granularity of charcoal is 30-50mm in the step a, and calcines 4h at a temperature of 600 DEG C.
In the step g, its copper content >=99.99% of the copper pipe of preparation, oxygen content≤10PPM, scale error≤±
0.05m, conductance >=99%IACS, Vickers hardness is within the scope of 80-100HV.
The present invention utilizes existing equipment, copper pipe is reached complete soft state by improving annealing temperature, and extend soaking time
The copper pipe state in stove at diverse location is reached stable and uniform, then by controlling drawing working modulus, reach the copper pipe of soft state
To half-hard state.
The beneficial effects of the invention are as follows：
1. compared with traditional production technology, this technological process of production is shorter, energy consumption is low；
2. compared with traditional production technology, the half-hard state copper pipe bus stable performance of this production technology production is uniform；
3. compared with traditional production technology, this production technology controls annealing temperature in soft state temperature range, the temperature range
It is wide in range to be easily controlled, suitable working modulus is then obtained by the control to drawing mould specification, and coordinate drawing speed to make
Copper pipe reaches half-hard state, and used mould is easily worked during this and precision is high.
Brief description of the drawings
Fig. 1 is the annealing schedule of production half-hard state copper pipe bus.
Embodiment
Below in conjunction with specific embodiment, clear, complete description is carried out to technical scheme.
A kind of disclosed random length half-hard state copper pipe bus production technology, specifically comprises the following steps：
A, it is electrolysed copper weld pool：Cathode copper is toasted into 30min in melting fire door in advance, and holding surface is cleaned without miscellaneous in baking process
Thing, then add and melting is carried out in smelting furnace, and the charcoal for being 100-150mm to smelting furnace copper liquid surface addition thickness covers
Layer, wherein the granularity of charcoal is 30-50mm, and 4h is calcined at a temperature of 600 DEG C, and melting in-furnace temperature is controlled in fusion process
For 1140-1170 DEG C, the copper liquid after melting flows to holding furnace by the chute of lower section and is incubated, and holding temperature is 1150-1200 DEG C,
And the copper liquid surface in holding furnace uses graphite flakes as coating；
B, continuous up-casting oxygen-free copper pipe：Copper liquid in holding furnace is sent constantly into graphite crystallizer, and in the presence of cooling water
Gradually solidification, the inflow temperature for controlling graphite crystallizer are 20-25 DEG C, and leaving water temperature is 25-35 DEG C, hydraulic pressure 1.0-
1.2MPa, the copper pipe after solidification is constantly pulled out by hauling machine forms continuous copper pipe, and the lead speed for controlling hauling machine is 30-
40mm/min；
C, tube rolling：Rolling device is sent into after the copper pipe for drawing to obtain in step b is perforated by feeder back and forth to be rolled
42 × 2.1mm of Φ semi-finished product copper pipe is formed, the feed of coiling winding, wherein feeder is then carried out to semi-finished product copper pipe
For 5mm/ times, copper pipe thickness deviation is ± 0.05m；
D, disk is drawn：Semi-finished product copper pipe after step c is rolled is sent into plate drawing machine, and the rolling expectation by 4-6 passage is advised
The copper pipe of lattice.Exemplified by rolling the copper pipe of Φ 18 × 1mm specifications, it needs the rolling by 5 passages, every time rolling parameter
It is as follows：
First passage：Size is 42 × 2.1mm of Φ before rolling, and size is 36 × 1.75mm of Φ, speed 175m/min after rolling；
Second passage：Size is 36 × 1.75mm of Φ before rolling, and size is 31.05 × 1.45mm of Φ, speed 200m/ after rolling
min；
3rd passage：Size is 31.05 × 1.45mm of Φ before rolling, and size is 27 × 1.15mm of Φ, speed 300m/ after rolling
min；
Four-pass：Size is 27 × 1.15mm of Φ before rolling, and size is 22.6 × 1mm of Φ, speed 250m/min after rolling；
5th passage：Size is 22.6 × 1mm of Φ before rolling, and size is 18 × 1mm of Φ, speed 250m/min after rolling；
E, after-combustion is cleaned：Cleaning agent and sponge ball are added in copper pipe after being drawn to step d 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；
F, anneal：Copper pipe after step e is packed rolls into well annealing furnace, at purity is annealing in 99.95% nitrogen atmosphere
Reason, heating-up time 5h is controlled, holding temperature is 400-450 DEG C, soaking time 2h, temperature fall time 5h, and tapping temperature is not
Higher than 40 DEG C, specific annealing process is as shown in Figure 1；
G, drawing：Copper pipe volume after step f annealing enters automatic hydraulic drawbench by aligning, is selected according to customer requirement different
The mould of specification, by reaching the control to working modulus to the selection of mould, so as to obtain half-hard state copper pipe bus, with laggard
Row cutting packaging.Wherein drawing speed is 15-25m/min, working modulus≤15%, needs to use drawing oil to be lubricated at mould
Cooling.
Copper content >=99.99% of the copper pipe bus, oxygen content≤10PPM, scale error≤± 0.05m, conductance >=
99%IACS, Vickers hardness is within the scope of 80-100HV.
The change in size of copper pipe bus, working modulus and Vickers hardness relation are as shown in the table：
One embodiment of the invention is described in detail above, but the content is only the preferable of the invention
Embodiment, it is impossible to be considered as the practical range for limiting the invention.It is all made according to the invention application range it is equal
Deng change and improvement etc., belong within the patent covering scope of the invention.
Claims (4)
1. a kind of random length half-hard state copper pipe bus production technology, it is characterised in that comprise the following steps：
A, it is electrolysed copper weld pool：Cathode copper is added in smelting furnace and carries out melting, and is to smelting furnace copper liquid surface addition thickness
100-150mm charcoal coating, it is 1140-1170 DEG C to control smelting temperature in smelting furnace, and the copper liquid in smelting furnace passes through
The chute of lower section flows to holding furnace insulation, and holding temperature is 1150-1200 DEG C, and the copper liquid surface in holding furnace uses graphite squama
Piece is as coating；
B, continuous up-casting oxygen-free copper pipe：Copper liquid in holding furnace is constantly entered into graphite crystallizer, and in the presence of cooling water
Gradually solidification, the inflow temperature for controlling graphite crystallizer are 20-25 DEG C, and leaving water temperature is 25-35 DEG C, hydraulic pressure 1.0-
1.2MPa, the copper pipe after solidification is constantly pulled out by hauling machine forms continuous copper pipe, and the lead speed for controlling hauling machine is 30-
40mm/min；
C, tube rolling：Rolling device is sent into after the copper pipe for drawing to obtain in step b is perforated by feeder back and forth to be rolled
42 × 2.1mm semi-finished product copper pipe is formed, coiling winding is then carried out to semi-finished product copper pipe, the feed of wherein feeder is
5mm/ times, copper pipe thickness deviation is ± 0.05m；
D, disk is drawn：Semi-finished product copper pipe after step c is rolled is sent into plate drawing machine, by the rolling of 4-6 passage, obtains it is expected rule
The copper pipe of lattice；
E, after-combustion is cleaned：Cleaning agent and sponge ball are added in copper pipe after being drawn to step d 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；
F, anneal：Copper pipe after step e is packed rolls into well annealing furnace, at purity is annealing in 99.95% nitrogen atmosphere
Reason obtains soft state copper pipe volume, controls heating-up time 5h, and holding temperature is 400-450 DEG C, soaking time 2h, and temperature fall time is
5h, and tapping temperature is not higher than 40 DEG C；
G, drawing：Copper pipe volume after step f annealing enters automatic hydraulic drawbench by aligning, is selected according to customer requirement corresponding
The mould of specification, drawing copper tubes are carried out by corresponding mould and obtain half-hard state copper pipe bus, then carry out cutting packaging, wherein
The drawing speed of drawbench is 15-25m/min, working modulus≤15%, needs to use drawing oil to be lubricated cooling at mould.
2. random length half-hard state copper pipe bus production technology according to claim 1, it is characterised in that：In the step a,
Cathode copper is previously placed in smelting furnace fire door baking 30min, and holding surface cleans no-sundries in baking process.
3. random length half-hard state copper pipe bus production technology according to claim 1, it is characterised in that：In the step a
The granularity of charcoal is 30-50mm, and calcines 4h at a temperature of 600 DEG C.
4. random length half-hard state copper pipe bus production technology according to claim 1, it is characterised in that：The step g systems
Standby copper pipe bus, its copper content >=99.99%, oxygen content≤10PPM, scale error≤± 0.05m, conductance >=99%
IACS, Vickers hardness is within the scope of 80-100HV.
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| CN201710820736.7A CN107738067A (en) | 2017-09-13 | 2017-09-13 | A kind of random length half-hard state copper pipe bus production technology |
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| CN201710820736.7A CN107738067A (en) | 2017-09-13 | 2017-09-13 | A kind of random length half-hard state copper pipe bus production technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433850A (en) * | 2018-10-30 | 2019-03-08 | 江苏亚太航空科技有限公司 | The technique of aluminum alloy round pipe drawing manufacture |
| CN110814069A (en) * | 2019-11-18 | 2020-02-21 | 龙口市龙蓬精密铜管有限公司 | Production method of semi-hard copper straight pipe and drawing die thereof |
| CN113290074A (en) * | 2021-05-22 | 2021-08-24 | 江阴和宏特种材料有限公司 | Preparation method of oxygen-free copper pipe for low-cost magnetron |
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| CN110814069A (en) * | 2019-11-18 | 2020-02-21 | 龙口市龙蓬精密铜管有限公司 | Production method of semi-hard copper straight pipe and drawing die thereof |
| CN113290074A (en) * | 2021-05-22 | 2021-08-24 | 江阴和宏特种材料有限公司 | Preparation method of oxygen-free copper pipe for low-cost magnetron |
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Application publication date: 20180227 |