CN110605304A - Production process of aluminum brass thin-wall pipe - Google Patents
Production process of aluminum brass thin-wall pipe Download PDFInfo
- Publication number
- CN110605304A CN110605304A CN201910880047.4A CN201910880047A CN110605304A CN 110605304 A CN110605304 A CN 110605304A CN 201910880047 A CN201910880047 A CN 201910880047A CN 110605304 A CN110605304 A CN 110605304A
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- Prior art keywords
- tube blank
- heat treatment
- blank
- aluminum brass
- annealing
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Classifications
-
- 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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention discloses a production process of an aluminum brass thin-wall pipe, which belongs to the field of nonferrous metal processing and forming, reduces metal loss and production cost, and improves production efficiency, yield and market competitiveness, and the production process of the aluminum brass thin-wall pipe comprises the following steps of S10: producing a tube blank after rolling, and carrying out heat treatment on the tube blank; s20: carrying out heat treatment on the pipe blank after primary mechanical combined drawing; s30: the tube blank is directly formed into a finished product through secondary mechanical combined drawing; s40: and detecting and processing a finished product, and packaging and warehousing after annealing.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of nonferrous metal processing and forming, in particular to a production process of an aluminum brass thin-wall pipe.
[ background of the invention ]
The aluminum brass has the characteristics of good corrosion resistance, high heat exchange coefficient, excellent mechanical property, welding property, prevention of microorganism adhesion growth and the like, is widely applied to steam turbine generator sets of seawater desalination devices, seawater reverse flow power stations, ocean ships and warships and the like, the annual market demand is over 10 million tons, thin-walled tubes account for about 30 percent, the existing process for producing the thin-walled tubes has the problems of high cost, low capacity and the like, and a new production process is needed for improving the product yield, improving the capacity, reducing the processing cost and improving the market competitiveness.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provide the production process of the aluminum brass thin-wall pipe, so that the metal loss and the production cost are reduced, and the production efficiency, the yield and the market competitiveness are improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
the production process of the aluminum brass thin-wall pipe comprises the following steps:
s10: producing a tube blank after rolling, and carrying out heat treatment on the tube blank;
s20: carrying out heat treatment on the pipe blank after primary mechanical combined drawing;
s30: the tube blank is directly formed into a finished product through secondary mechanical combined drawing;
s40: and detecting and processing a finished product, and packaging and warehousing after annealing.
The traditional process adopts multiple three-line drawing to draw the tube blank to a required finished product, the invention adopts twice mechanical combined drawing to rapidly draw the tube blank to the finished product, the efficiency is higher, and the problems of high cost, low productivity and the like of the traditional process are solved.
Further, in step S10, the heat treatment is natural gas intermediate annealing. The specification of the tube blank generated by rolling is larger, the power required by heat treatment is larger, the cost of intermediate annealing by using natural gas is lower, and the first time is only needed.
Further, the natural gas intermediate annealing adopts water cooling to roll the tube blank. The reason that water cooling is selected for annealing and cooling the tube blank is that the rolled tube blank is long and cannot be subjected to acid pickling in production, and the water cooling can quickly cool the tube and eliminate black oxide skin on the surface.
Further, in step S20, the heat treatment is in-line induction annealing. The tube blank is provided with a hard shell and a tough core through induction annealing, nitrogen is filled for protection in the annealing process, no oxide skin is generated, a workpiece is not deformed, high-frequency induction equipment adopts electric energy, the high-frequency induction equipment utilizes the electromagnetic conversion principle, has higher conversion efficiency compared with gas, coal or coke, is more energy-saving, can perform rapid heat treatment, has short heating period, can be matched with assembly line or automatic production, has high repeatability and high precision, has very high repeatable operability in assembly line or automatic process, only needs to set parameters, has highly uniform precision, the aluminum brass thin-wall tube needs mass production, the product yield and production efficiency can be improved and the processing cost can be reduced by adopting online induction annealing, the larger the tube blank has higher requirements on equipment, the larger the tube specification has higher required power, and the larger the cooling water flow, the larger the nitrogen filling amount is, the more expensive the matched guide rail guide sleeve is, so that in step S10, the rolled tube blank is subjected to natural gas intermediate annealing, and the natural gas annealing is only needed to be performed for the first time.
Further, the tube blank needs to be cleaned before heat treatment. Remove grease, dirt, cutting fluid and metal debris on the surface of the steel, avoid polluting the work site and the environment and realize the recycling of waste.
Further, in step S30, the raw pipe is drawn in series by using two drawing machines. The pipe diameter becomes little after the pipe is drawn of first bench allies oneself with the drawing machine, the wall thickness thins, degree pipe diameter after the drawing that continues again through the second bench allies oneself with the drawing machine, the product that the wall thickness meets the requirements, it causes the damage to tubular product to have avoided directly drawing the pipe to the finished product, use three-way drawing among the traditional technology, work efficiency is low, and the pipe is sawed into the multistage before drawing, every section pipe can produce the system head when tensile, the system head need be amputated in follow-up, its yield is lower, draw tubular product through allies oneself with the drawing machine, can draw into required finished product with a whole tubular product, only need system head once, the metal that consumes is still less, work efficiency, the yield is higher.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and illustrated below, but the following embodiments are only preferred embodiments of the present invention, and not all of them. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
The invention provides a production process of an aluminum brass thin-wall pipe, which comprises the following steps:
s10: producing a tube blank after rolling, and carrying out heat treatment on the tube blank;
s20: carrying out heat treatment on the pipe blank after primary mechanical combined drawing;
s30: the tube blank is directly formed into a finished product through secondary mechanical combined drawing;
s40: and detecting and processing a finished product, and packaging and warehousing after annealing.
For convenience of explanation, the finished product Φ 25.32 × 0.65 is taken as an example for explanation. In the step S10, tube blanks with the diameter of 48 multiplied by 2.0 are obtained through rolling, then the tube blanks are subjected to first heat treatment, the step S20 is carried out, the tube blanks with the diameter of 48 multiplied by 2.0 are subjected to mechanical combined drawing to obtain tube blanks with the diameter of 33.5 multiplied by 1.15, the tube blanks are subjected to second heat treatment, in the step S30, the tube blanks with the diameter of 33.5 multiplied by 1.15 are subjected to mechanical combined drawing of a combined drawing machine to obtain finished tube blanks with the diameter of 25.32 multiplied by 0.65, the finished tube blanks are finally subjected to the step S40, the subsequent operations of online straightening, online flaw detection, fine grinding heads, saw cutting sizing, ultrasonic cleaning and the like are carried out, finally the finished tube blanks are annealed by a mesh belt furnace, and the finished product.
In the traditional process, in the first step, raw materials are rolled to obtain a tube blank with phi 48 x 2.0, the tube blank is subjected to primary heat treatment, in the second step, the tube blank with phi 48 x 2.0 is mechanically drawn to obtain a tube blank with phi 33.5 x 1.15, the tube blank is sawn into a plurality of sections, each section of the tube blank is subjected to secondary heat treatment, in the step S30, the tube blank with phi 29 x 0.83 is obtained through primary three-line drawing, then the tube blank with phi 25.32 x 0.65 is obtained through secondary three-line drawing, and finally the tube blank enters the step S40, is subjected to subsequent operations of online straightening, eddy current flaw detection, fine grinding head, sawing sizing, ultrasonic cleaning and the like, and finally is annealed by a mesh belt furnace, and the finished product is packaged and warehoused.
The difference between the two processes is: the traditional process adopts multiple three-line drawing to draw the tube blank to a required finished product, the invention adopts two times of mechanical combined drawing to rapidly draw the tube blank to the finished product, the efficiency is higher, and the problems of high cost, low productivity and the like of the traditional process are solved.
In the production process of the aluminum brass thin-wall pipe, two heat treatments are carried out, wherein in the invention, the first heat treatment is natural gas intermediate annealing, and the second heat treatment is online induction annealing; in the conventional process, both heat treatments are natural gas intermediate anneals.
The difference between natural gas annealing and induction annealing mainly lies in different heating modes, different cooling modes and different protective atmospheres; the natural gas annealing heating mode is that natural gas is used for heating, air cooling or water cooling is adopted, and protective gas is not filled; the induction annealing heating mode is electromagnetic induction heating, water cooling and nitrogen gas filling protection.
Larger tube sizes require higher equipment. The larger the specification of the pipe is, the larger the power required is, the larger the cooling water flow is, the larger the nitrogen filling amount is, the more expensive the matched guide rail guide sleeve is, and meanwhile, natural gas annealing is adopted only for the first time, and the comprehensive cost and the yield are considered, so natural gas intermediate annealing water cooling is adopted, and therefore, natural gas annealing is adopted for the first heat treatment;
the second heat treatment adopts on-line induction annealing, so that the tube blank is provided with a hard shell and a tough core, in the annealing process, nitrogen is filled for protection, no oxide skin is generated, the workpiece is not deformed, high-frequency induction equipment adopts electric energy, the high-frequency induction equipment utilizes the electromagnetic conversion principle, the high-frequency induction equipment has higher conversion efficiency of coal or coke by using fuel gas, is more energy-saving and can carry out rapid heat treatment, the heating period is short, the high-frequency induction equipment can be matched with assembly lines or automatic production, the repeatability is high, the precision is high, the high-frequency induction equipment has high repeatability, only parameters need to be set, the precision can be highly unified, the aluminum brass thin-wall tubes need to be produced in large scale, and the on-line induction annealing can improve the product yield, the production efficiency and.
In the traditional process and the process of the invention, the first natural gas annealing cooling mode adopts water cooling which can rapidly cool the tube blank, when the air cooling is adopted, oxide skin and other impurities attached to the inner surface and the outer surface of the tube blank can be formed and need to be removed by acid cleaning, and the rolled tube blank has the length of about 50m and can not be acid cleaned in the prior production.
Compared with the production process provided by the invention, in the traditional process, the tube blank after being sawed can generate a plurality of manufactured heads after being annealed by natural gas, and the manufactured heads need to be cut off in the follow-up process, so that the metal loss is increased, the consumption of saw blades can be increased by multiple times of sawing (sawing before the second heat treatment and sawing during removing the manufactured heads), the production cost is increased, the production efficiency is reduced, meanwhile, the production process has no pickling process, the metal loss during pickling is reduced, the yield is improved, the influence of acid liquor on the environment can be reduced, and the environmental protection is facilitated.
The tube blank also needs to be cleaned before being subjected to heat treatment. Remove grease, dirt, cutting fluid and metal debris on the surface of the steel, avoid polluting the work site and the environment and realize the recycling of waste.
When the pipe is drawn, the phi 33.5 multiplied by 1.15 pipe blank is drawn into a phi 25.32 multiplied by 0.65 finished product through mechanical combined drawing, and the pipe can be broken and damaged through one-time drawing, so that the pipe is drawn twice through the joint work of two combined drawing machines, the pipe blank is drawn from the phi 33.5 multiplied by 1.15 to the phi 29 multiplied by 0.83 through the first combined drawing machine, the drawn pipe is transmitted to the second combined drawing machine, and the pipe blank is drawn from the phi 29 multiplied by 0.83 to the phi 25.32 multiplied by 0.65 finished product through the drawing of the second combined drawing machine; compared with the traditional process, the three-wire drawing is a chain type drawing machine, the drawing length is limited by equipment, the drawing speed is low, the efficiency is low, the mechanical drawing is a serial drawing machine, the drawing length is not limited by the equipment, the drawing speed is high, the number of heads is small, the size precision can meet the requirements of customers, the efficiency is high, a drawing die on the drawing machine adopts a diamond finished product outer die, the drawing die can be in a high-temperature working state for a long time in the drawing process of a tube blank, the diamond finished product outer die can not be worn in the long-time high-temperature working state, and the geometric dimension is not deformed.
The conventional process is the same as the process of the present invention in the first mechanical drawing for cogging, and in addition, the second mechanical drawing in step S30 of the present invention is divided into two times, wherein the first mechanical drawing is for cogging and the second mechanical drawing is for drawing a finished product.
The cold drawing (drawing) has an important parameter elongation coefficient, the total elongation coefficient is controlled besides the elongation coefficient of each pass, the plasticity of the material is gradually reduced along with the increase of the deformation, when the actual elongation coefficient meets the limit requirement, annealing is needed, recrystallization is carried out to eliminate stress, otherwise, the material is broken in the drawing process, the total elongation coefficient of the tube blank between two annealing processes is required to be less than 3, the elongation coefficient of each pass is preferably controlled to be 1.25-1.60, the elongation coefficient from phi 48 x 2.0 to phi 25.32 x 0.65 is 5.74, and the tube blank cannot be directly drawn to a finished product, so the finished product is obtained by multiple drawing.
It should also be noted that: in the production process, the step S40 adopts online flaw detection to detect cracks or defects in the tube blank, the lifting frequency is reduced to reduce the damage to the copper tube, the production efficiency is improved, and the workload of eddy current flaw detection personnel can be reduced;
the number of the heads of the two processes is greatly different, about 20 heads can be generated in the production process of the traditional process, and only 2 heads are generated in the production process provided by the invention, so that a large amount of metal can be saved.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in other forms without departing from the spirit or essential characteristics thereof. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (6)
1. The production process of the aluminum brass thin-wall pipe is characterized by comprising the following steps of:
s10: producing a tube blank after rolling, and carrying out heat treatment on the tube blank;
s20: carrying out heat treatment on the pipe blank after primary mechanical combined drawing;
s30: the tube blank is directly formed into a finished product through secondary mechanical combined drawing;
s40: and detecting and processing a finished product, and packaging and warehousing after annealing.
2. The process for producing the aluminum brass thin-walled tube according to claim 1, wherein: in step S10, the heat treatment is natural gas intermediate annealing.
3. The process for producing the aluminum brass thin-walled tube according to claim 2, wherein: and the natural gas intermediate annealing adopts water cooling to roll the tube blank.
4. The process for producing the aluminum brass thin-walled tube according to claim 3, wherein: in step S20, the heat treatment is in-line induction annealing.
5. The process for producing an aluminum brass thin walled tube according to any one of claims 1 to 4, wherein: the tube blank also needs to be cleaned before heat treatment.
6. The process for producing the aluminum brass thin-walled tube according to claim 5, wherein: in the step S30, the tube blank is drawn in series by using two drawing machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910880047.4A CN110605304A (en) | 2019-09-18 | 2019-09-18 | Production process of aluminum brass thin-wall pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910880047.4A CN110605304A (en) | 2019-09-18 | 2019-09-18 | Production process of aluminum brass thin-wall pipe |
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| CN110605304A true CN110605304A (en) | 2019-12-24 |
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| CN201910880047.4A Pending CN110605304A (en) | 2019-09-18 | 2019-09-18 | Production process of aluminum brass thin-wall pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114850238A (en) * | 2022-04-27 | 2022-08-05 | 上海海亮铜业有限公司 | Preparation method of iron bronze pipe |
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| PL189820B1 (en) * | 1998-07-30 | 2005-09-30 | Outokumpu Oy | Method of making copper tubes |
| CN102699101A (en) * | 2012-05-29 | 2012-10-03 | 金川集团股份有限公司 | Manufacturing method for HA177-2 brass alloy tube |
| CN104630669A (en) * | 2013-11-08 | 2015-05-20 | 青岛宏泰铜业有限公司 | H62 brass tube production technology |
| CN104726806A (en) * | 2013-12-20 | 2015-06-24 | 青岛润鑫伟业科贸有限公司 | Method used for preparing seamless aluminum brass tubes |
| CN104826889A (en) * | 2015-04-17 | 2015-08-12 | 浙江海亮股份有限公司 | Brass tube manufacturing method |
| JP2015217400A (en) * | 2014-05-14 | 2015-12-07 | 日立アプライアンス株式会社 | Method for production of different-and small-diameter copper tube, and different-and small-diameter copper tube |
| CN105695907A (en) * | 2015-09-18 | 2016-06-22 | 安庆市盛唐制冷设备有限责任公司 | Production technology for brass condenser pipe |
| CN205571039U (en) * | 2016-01-26 | 2016-09-14 | 广东志高科创铜业有限公司 | Copper is managed rollingly and effect continuous production unit is drawn high to trigeminy |
| CN106216431A (en) * | 2016-08-05 | 2016-12-14 | 徐高磊 | A kind of production technology of D type copper pipe |
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2019
- 2019-09-18 CN CN201910880047.4A patent/CN110605304A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL189820B1 (en) * | 1998-07-30 | 2005-09-30 | Outokumpu Oy | Method of making copper tubes |
| CN102699101A (en) * | 2012-05-29 | 2012-10-03 | 金川集团股份有限公司 | Manufacturing method for HA177-2 brass alloy tube |
| CN104630669A (en) * | 2013-11-08 | 2015-05-20 | 青岛宏泰铜业有限公司 | H62 brass tube production technology |
| CN104726806A (en) * | 2013-12-20 | 2015-06-24 | 青岛润鑫伟业科贸有限公司 | Method used for preparing seamless aluminum brass tubes |
| JP2015217400A (en) * | 2014-05-14 | 2015-12-07 | 日立アプライアンス株式会社 | Method for production of different-and small-diameter copper tube, and different-and small-diameter copper tube |
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| CN105695907A (en) * | 2015-09-18 | 2016-06-22 | 安庆市盛唐制冷设备有限责任公司 | Production technology for brass condenser pipe |
| CN205571039U (en) * | 2016-01-26 | 2016-09-14 | 广东志高科创铜业有限公司 | Copper is managed rollingly and effect continuous production unit is drawn high to trigeminy |
| CN106216431A (en) * | 2016-08-05 | 2016-12-14 | 徐高磊 | A kind of production technology of D type copper pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114850238A (en) * | 2022-04-27 | 2022-08-05 | 上海海亮铜业有限公司 | Preparation method of iron bronze pipe |
| CN114850238B (en) * | 2022-04-27 | 2023-12-05 | 上海海亮铜业有限公司 | Preparation method of iron bronze pipe |
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Application publication date: 20191224 |