CN109351802A - A kind of processing method of heavy wall oxygen-free copper copper pipe - Google Patents
A kind of processing method of heavy wall oxygen-free copper copper pipe Download PDFInfo
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- CN109351802A CN109351802A CN201811286140.4A CN201811286140A CN109351802A CN 109351802 A CN109351802 A CN 109351802A CN 201811286140 A CN201811286140 A CN 201811286140A CN 109351802 A CN109351802 A CN 109351802A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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Abstract
The invention discloses a kind of processing methods of heavy wall oxygen-free copper copper pipe, comprising the following steps: 1) founding chooses acid bronze alloy as raw material and, by deoxidization technique, copper water is solidified as to solid oxygen-free copper ingot casting after acid bronze alloy fusing;2) it squeezes, oxygen-free copper ingot casting obtained in step 1) is squeezed into circular pipe blank;3) circle pipe obtained in step 2) is drawn to finished product tubing using the drawing mode of fixed core ball and fixed external mold by multi pass drawing;4) it anneals, carries out the heat treatment process of vacuum mode after completion of processing to finished product tubing per pass.The present invention may make product not lead to pecker broken needle because inner hole is too small when being squeezed into blank, damage pipe, lead to not the cold working for carrying out next step；And it avoids because continuous drawing causes the defects of breaking, pulling.
Description
Technical field
The present invention relates to non-ferrous metals processing fields, and in particular to a kind of processing method of heavy wall oxygen-free copper copper pipe.
Background technique
In copper pipe, when the ratio of outer diameter and wall thickness is greater than 4:1, such as outer diameter 30mm wall thickness 10mm, in this way obtained by outside it
The ratio of diameter and wall thickness is 3:1, is greater than 4:1, and this tubing is classified as thick-walled pipe by us, since this tube wall thickness is extremely thick,
So thick-walled pipe can not be produced using domestic used generally processing technology of rolling, and the oxygen-free copper copper pipe (anaerobic of heavy wall
Copper be oxygen content be less than or equal to 5 ppm copper product) be large-scale thermal power machine group and nuclear power generating equipment important component,
The vital task of delivery electric power is carry, but since production technology of the country for this kind of product still falls within blank stage, mesh
Preceding major power equipment production firm of the country for heavy wall copper pipe buying mainly by being restricted by foreign countries from external import.I
Company has produced the heavy wall copper pipe for complying fully with import standard, this is right by the research and innovation for copper material processing technology
In China production power equipment cost savings and technological innovation it is significant.
Summary of the invention
In view of this, providing a kind of heavy wall oxygen-free copper copper pipe the purpose of the invention is to process heavy wall oxygen-free copper copper pipe
Processing method.
To solve the above-mentioned problems, the technical scheme is that a kind of processing method of heavy wall oxygen-free copper copper pipe, including
Following steps:
1) founding is chosen acid bronze alloy as raw material and, by deoxidization technique, copper water is coagulated after acid bronze alloy fusing
Admittedly being solid oxygen-free copper ingot casting;
2) it squeezes, oxygen-free copper ingot casting obtained in step 1) is squeezed into circular pipe blank;
3) multi pass drawing, using the drawing mode of fixed core ball and fixed external mold by circle pipe drawing obtained in step 2)
To finished product tubing;
4) it anneals, carries out the heat treatment process of vacuum mode after completion of processing to finished product tubing per pass.
Further, in step 1), the acid bronze alloy of the selection must meet GB/T467-2010 Cu-CATH-1 (Cu-
CATH -1) standard.Copper purity must reach 99.995% or more.
Further, in step 1), specific step is as follows for founding process: the acid bronze alloy being cut into bulk and is packed into
The feeding mechanism of vacuum electron beam smelting furnace is evacuated to power transmission after high vacuum after entering the electron-beam furnace, carries out electron beam essence
Refining, the copper melts after fusing fall into device for directionally solidifying-graphite crucible, form the casting in bronze ingot by cooled and solidified.The copper
Ingot diameters are 295mm, casting in bronze ingot sawing length 450mm described in every section.
Further, after the completion of step 1), the casting in bronze ingot is heated using power frequency heating furnace.
Further, it in step 2), when being squeezed, is worn using 5000 tons of horizontal water seal extruders and matched extrusion die
Hole carries out tube extrusion for the casting in bronze ingot of heating, and extrusion die is special extrusion die, and by the inlet of 80 extrusion die of φ
It is designed as arc-shaped, so that copper material can at the uniform velocity enter extrusion die orifice when squeezing, avoids leading to pecker quilt since wall thickness is too thick
Copper liquid squeezes off and causes to squeeze failure, and pecker adds the fixed needle of φ 35 to combine using the fixed needle body of φ 70.Enhance needle body
Intensity.
Further, in step 2), extrusion speed control in 50 ~ 55mm/s, squeeze general working rate control 80 ~ 90% it
Between, first the casting in bronze ingot heated is sent into extrusion cylinder when extruding, a circular ring shape is put behind the casting in bronze ingot
Dummy block, makes to squeeze axis and pushes the dummy block and the casting in bronze ingot travels forward, and passes through extrusion die orifice and the perforation aciculiform
At annulus and form the circular pipe blank.The circular pipe blank specification is Φ 80*22.5mm.
Further, in step 3), when time drawing of shunting, the pipe specification is Φ 80*22.5mm*6000mm, per pass
Secondary working modulus control is 40 ~ 45%.The specification that the production tube to be formed is completed in drawing is Φ 40*12.5*8000mm.
Further, between step 1) and step 2), increase the detecting step to the casting in bronze ingot.Analysis copper content,
Oxygen content, grain size and various impurity contents.
Further, between step 2) and step 3), increase and dimensional tolerance and surface quality are carried out to the circular pipe blank
The step of inspection, and the quality problems checked are modified.
Further, after the completion of step 4), by product technology requirement indices to the production tube after annealing into
The final detection of row, the index include product size tolerance, surface quality, chemical component, mechanical performance, are carried out after detection is qualified
It is packed and stored.
Beneficial effects of the present invention: a kind of processing method of the toothed circular copper pipe of inner wall of the present invention is adopted in step 2
Product is processed with innovative Extrusion Die Design and pecker design, makes product will not when being squeezed into blank
Lead to pecker broken needle because inner hole is too small, damage pipe, leads to not the cold working for carrying out next step；In step 3),
Using the drawing die and core ball of special designing, blank is drawn to by finished size according to the relationship of working modulus；It, will in step 4)
Product is put into vacuum annealing furnace and is heat-treated, and by the way of vacuumizing and being filled with protective gas, heats product to
580 DEG C, to restore its plasticity, avoid because continuous drawing causes the defects of breaking, pulling.
Specific implementation method
Embodiment 1
A kind of processing method of heavy wall oxygen-free copper copper pipe, comprising the following steps:
1) founding is chosen acid bronze alloy as raw material and, by deoxidization technique, copper water is coagulated after acid bronze alloy fusing
Admittedly being solid oxygen-free copper ingot casting;
2) it squeezes, oxygen-free copper ingot casting obtained in step 1) is squeezed into circular pipe blank;
3) multi pass drawing, using the drawing mode of fixed core ball and fixed external mold by circle pipe drawing obtained in step 2)
To finished product tubing;
4) it anneals, carries out the heat treatment process of vacuum mode after completion of processing to finished product tubing per pass.
Further, in step 1), the acid bronze alloy of the selection must meet GB/T467-2010 Cu-CATH-1 (Cu-
CATH -1) standard.Copper purity must reach 99.995% or more.
Further, in step 1), specific step is as follows for founding process: the acid bronze alloy being cut into bulk and is packed into
The feeding mechanism of vacuum electron beam smelting furnace is evacuated to power transmission after high vacuum after entering the electron-beam furnace, carries out electron beam essence
Refining, the copper melts after fusing fall into device for directionally solidifying-graphite crucible, form the casting in bronze ingot by cooled and solidified.The copper
Ingot diameters are 295mm, casting in bronze ingot sawing length 450mm described in every section.
Further, after the completion of step 1), the casting in bronze ingot is heated using power frequency heating furnace.
Further, it in step 2), when being squeezed, is worn using 5000 tons of horizontal water seal extruders and matched extrusion die
Hole carries out tube extrusion for the casting in bronze ingot of heating, and extrusion die is special extrusion die, and by the inlet of 80 extrusion die of φ
It is designed as arc-shaped, so that copper material can at the uniform velocity enter extrusion die orifice when squeezing, avoids leading to pecker quilt since wall thickness is too thick
Copper liquid squeezes off and causes to squeeze failure, and pecker adds the fixed needle of φ 35 to combine using the fixed needle body of φ 70.Enhance needle body
Intensity.
Further, in step 2), extrusion speed control squeezes general working rate control between 80%, squeezes in 50mm/s
When first by the casting in bronze ingot heated be sent into extrusion cylinder in, the dummy block of a circular ring shape is put behind the casting in bronze ingot,
Make to squeeze the annulus that axis pushes the dummy block and the casting in bronze ingot travels forward, and is formed across extrusion die orifice and the pecker
And form the circular pipe blank.The circular pipe blank specification is Φ 80*22.5mm.
Further, in step 3), when time drawing of shunting, the pipe specification is Φ 80*22.5mm*6000mm, per pass
Secondary working modulus control is 40%.The specification that the production tube to be formed is completed in drawing is Φ 40*12.5*8000mm.
Further, between step 1) and step 2), increase the detecting step to the casting in bronze ingot.Analysis copper content,
Oxygen content, grain size and various impurity contents.
Further, between step 2) and step 3), increase and dimensional tolerance and surface quality are carried out to the circular pipe blank
The step of inspection, and the quality problems checked are modified.
Further, after the completion of step 4), by product technology requirement indices to the production tube after annealing into
The final detection of row, the index include product size tolerance, surface quality, chemical component, mechanical performance, are carried out after detection is qualified
It is packed and stored.
Embodiment 2
A kind of processing method of heavy wall oxygen-free copper copper pipe, comprising the following steps:
1) founding is chosen acid bronze alloy as raw material and, by deoxidization technique, copper water is coagulated after acid bronze alloy fusing
Admittedly being solid oxygen-free copper ingot casting;
2) it squeezes, oxygen-free copper ingot casting obtained in step 1) is squeezed into circular pipe blank;
3) multi pass drawing, using the drawing mode of fixed core ball and fixed external mold by circle pipe drawing obtained in step 2)
To finished product tubing;
4) it anneals, carries out the heat treatment process of vacuum mode after completion of processing to finished product tubing per pass.
Further, in step 1), the acid bronze alloy of the selection must meet GB/T467-2010 Cu-CATH-1 (Cu-
CATH -1) standard.Copper purity must reach 99.995% or more.
Further, in step 1), specific step is as follows for founding process: the acid bronze alloy being cut into bulk and is packed into
The feeding mechanism of vacuum electron beam smelting furnace is evacuated to power transmission after high vacuum after entering the electron-beam furnace, carries out electron beam essence
Refining, the copper melts after fusing fall into device for directionally solidifying-graphite crucible, form the casting in bronze ingot by cooled and solidified.The copper
Ingot diameters are 295mm, casting in bronze ingot sawing length 450mm described in every section.
Further, after the completion of step 1), the casting in bronze ingot is heated using power frequency heating furnace.
Further, it in step 2), when being squeezed, is worn using 5000 tons of horizontal water seal extruders and matched extrusion die
Hole carries out tube extrusion for the casting in bronze ingot of heating, and extrusion die is special extrusion die, and by the inlet of 80 extrusion die of φ
It is designed as arc-shaped, so that copper material can at the uniform velocity enter extrusion die orifice when squeezing, avoids leading to pecker quilt since wall thickness is too thick
Copper liquid squeezes off and causes to squeeze failure, and pecker adds the fixed needle of φ 35 to combine using the fixed needle body of φ 70.Enhance needle body
Intensity.
Further, in step 2), extrusion speed control squeezes general working rate control between 90%, squeezes in 55mm/s
When first by the casting in bronze ingot heated be sent into extrusion cylinder in, the dummy block of a circular ring shape is put behind the casting in bronze ingot,
Make to squeeze the annulus that axis pushes the dummy block and the casting in bronze ingot travels forward, and is formed across extrusion die orifice and the pecker
And form the circular pipe blank.The circular pipe blank specification is Φ 80*22.5mm.
Further, in step 3), when time drawing of shunting, the pipe specification is Φ 80*22.5mm*6000mm, per pass
Secondary working modulus control is 45%.The specification that the production tube to be formed is completed in drawing is Φ 40*12.5*8000mm.
Further, between step 1) and step 2), increase the detecting step to the casting in bronze ingot.Analysis copper content,
Oxygen content, grain size and various impurity contents.
Further, between step 2) and step 3), increase and dimensional tolerance and surface quality are carried out to the circular pipe blank
The step of inspection, and the quality problems checked are modified.
Further, after the completion of step 4), by product technology requirement indices to the production tube after annealing into
The final detection of row, the index include product size tolerance, surface quality, chemical component, mechanical performance, are carried out after detection is qualified
It is packed and stored.
Embodiment 3
A kind of processing method of heavy wall oxygen-free copper copper pipe, comprising the following steps:
1) founding is chosen acid bronze alloy as raw material and, by deoxidization technique, copper water is coagulated after acid bronze alloy fusing
Admittedly being solid oxygen-free copper ingot casting;
2) it squeezes, oxygen-free copper ingot casting obtained in step 1) is squeezed into circular pipe blank;
3) multi pass drawing, using the drawing mode of fixed core ball and fixed external mold by circle pipe drawing obtained in step 2)
To finished product tubing;
4) it anneals, carries out the heat treatment process of vacuum mode after completion of processing to finished product tubing per pass.
Further, in step 1), the acid bronze alloy of the selection must meet GB/T467-2010 Cu-CATH-1 (Cu-
CATH -1) standard.Copper purity must reach 99.995% or more.
Further, in step 1), specific step is as follows for founding process: the acid bronze alloy being cut into bulk and is packed into
The feeding mechanism of vacuum electron beam smelting furnace is evacuated to power transmission after high vacuum after entering the electron-beam furnace, carries out electron beam essence
Refining, the copper melts after fusing fall into device for directionally solidifying-graphite crucible, form the casting in bronze ingot by cooled and solidified.The copper
Ingot diameters are 295mm, casting in bronze ingot sawing length 450mm described in every section.
Further, after the completion of step 1), the casting in bronze ingot is heated using power frequency heating furnace.
Further, it in step 2), when being squeezed, is worn using 5000 tons of horizontal water seal extruders and matched extrusion die
Hole carries out tube extrusion for the casting in bronze ingot of heating, and extrusion die is special extrusion die, and by the inlet of 80 extrusion die of φ
It is designed as arc-shaped, so that copper material can at the uniform velocity enter extrusion die orifice when squeezing, avoids leading to pecker quilt since wall thickness is too thick
Copper liquid squeezes off and causes to squeeze failure, and pecker adds the fixed needle of φ 35 to combine using the fixed needle body of φ 70.Enhance needle body
Intensity.
Further, in step 2), extrusion speed control squeezes general working rate control between 85%, squeezes in 53mm/s
When first by the casting in bronze ingot heated be sent into extrusion cylinder in, the dummy block of a circular ring shape is put behind the casting in bronze ingot,
Make to squeeze the annulus that axis pushes the dummy block and the casting in bronze ingot travels forward, and is formed across extrusion die orifice and the pecker
And form the circular pipe blank.The circular pipe blank specification is Φ 80*22.5mm.
Further, in step 3), when time drawing of shunting, the pipe specification is Φ 80*22.5mm*6000mm, per pass
Secondary working modulus control is 42%.The specification that the production tube to be formed is completed in drawing is Φ 40*12.5*8000mm.
Further, between step 1) and step 2), increase the detecting step to the casting in bronze ingot.Analysis copper content,
Oxygen content, grain size and various impurity contents.
Further, between step 2) and step 3), increase and dimensional tolerance and surface quality are carried out to the circular pipe blank
The step of inspection, and the quality problems checked are modified.
Further, after the completion of step 4), by product technology requirement indices to the production tube after annealing into
The final detection of row, the index include product size tolerance, surface quality, chemical component, mechanical performance, are carried out after detection is qualified
It is packed and stored.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The change or replacement expected without creative work, should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of processing method of heavy wall oxygen-free copper copper pipe, it is characterised in that: the following steps are included:
1) founding is chosen acid bronze alloy as raw material and, by deoxidization technique, copper water is coagulated after acid bronze alloy fusing
Admittedly being solid oxygen-free copper ingot casting;
2) it squeezes, oxygen-free copper ingot casting obtained in step 1) is squeezed into circular pipe blank;
3) multi pass drawing, using the drawing mode of fixed core ball and fixed external mold by circle pipe drawing obtained in step 2)
To finished product tubing;
4) it anneals, carries out the heat treatment process of vacuum mode after completion of processing to finished product tubing per pass.
2. a kind of processing method of heavy wall oxygen-free copper copper pipe according to claim 1, it is characterised in that: in step 1), institute
The acid bronze alloy for stating selection must meet GB/T467-2010 Cu-CATH-1 (Cu-CATH -1) standard.
3. a kind of processing method of heavy wall oxygen-free copper copper pipe according to claim 1, it is characterised in that: in step 1), melt
Specific step is as follows for foundry work sequence: the acid bronze alloy is cut into bulk and is packed into the feeding mechanism of vacuum electron beam smelting furnace, to
Into after the electron-beam furnace, it is evacuated to power transmission after high vacuum, carries out electron beam melting purification, it is solidifying that the copper melts after fusing fall into orientation
It is fixedly mounted with and sets-graphite crucible, form the casting in bronze ingot by cooled and solidified.
4. a kind of processing method of heavy wall oxygen-free copper copper pipe according to claim 1, it is characterised in that: step 1) is completed
Afterwards, the casting in bronze ingot is heated using power frequency heating furnace.
5. a kind of processing method of heavy wall oxygen-free copper copper pipe according to claim 1, it is characterised in that: in step 2), into
When row squeezes, pipe is carried out to the casting in bronze ingot of heating using 5000 tons of horizontal water seal extruders and matched extrusion die pecker
Material squeezes, and extrusion die is special extrusion die.
6. a kind of processing method of heavy wall oxygen-free copper copper pipe according to claim 1, it is characterised in that: in step 2), squeeze
It presses speed control in 50 ~ 55mm/s, squeezes general working rate control between 80 ~ 90%, the casting in bronze that when extruding will first heat
Ingot is sent into extrusion cylinder, and the dummy block of a circular ring shape is put behind the casting in bronze ingot, and extruding axis is made to push the dummy block
It travels forward with the casting in bronze ingot, forms the circular pipe blank across the annulus that extrusion die orifice and the pecker are formed.
7. a kind of processing method of heavy wall oxygen-free copper copper pipe according to claim 1, it is characterised in that: in step 3), point
When passage drawing, working modulus control is 40 ~ 45% per pass.
8. a kind of processing method of heavy wall oxygen-free copper copper pipe according to claim 1, it is characterised in that: in step 1) and step
It is rapid 2) between, increase to the detecting step of the casting in bronze ingot.
9. a kind of processing method of heavy wall oxygen-free copper copper pipe according to claim 1, it is characterised in that: in step 2) and step
It is rapid 3) between, increase and the step of dimensional tolerance and surface quality check carried out to the circular pipe blank, and the quality checked is asked
Topic is modified.
10. a kind of processing method of heavy wall oxygen-free copper copper pipe according to claim 1, it is characterised in that: step 4) is completed
Afterwards, the production tube after annealing is finally detected by the indices of product technology requirement, the index includes product
Dimensional tolerance, surface quality, chemical component, mechanical performance are packed and stored after detection is qualified.
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|---|---|---|---|
| CN201811286140.4A CN109351802A (en) | 2018-10-31 | 2018-10-31 | A kind of processing method of heavy wall oxygen-free copper copper pipe |
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| CN201811286140.4A CN109351802A (en) | 2018-10-31 | 2018-10-31 | A kind of processing method of heavy wall oxygen-free copper copper pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113351680A (en) * | 2021-07-15 | 2021-09-07 | 河北欧通有色金属制品有限公司 | Oxygen-free copper capillary tube and processing method thereof |
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Application publication date: 20190219 |