WO2004078372A1 - Method for treating the inner surface of a tube - Google Patents
Method for treating the inner surface of a tube Download PDFInfo
- Publication number
- WO2004078372A1 WO2004078372A1 PCT/FI2004/000086 FI2004000086W WO2004078372A1 WO 2004078372 A1 WO2004078372 A1 WO 2004078372A1 FI 2004000086 W FI2004000086 W FI 2004000086W WO 2004078372 A1 WO2004078372 A1 WO 2004078372A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tube
- cleaning treatment
- extruded tube
- extruded
- final size
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid
-
- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
-
- 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
-
- 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
- B21C43/00—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
Definitions
- the invention relates to a method according to claim 1 for manufacturing a copper or copper alloy tube.
- the invention relates to a cleaning treatment carried out on the inner surface of an extruded tube before the tube is worked to its final size.
- a solid metal billet is by means of a mandrel worked to the form of a tube.
- lubricating the mandrel surface there are used for instance graphite-based materials, the contents of which may be harmful in the further processing of the tubes.
- Hot extruded tube billets, i.e. extruded tubes are thereafter drawn to their final size. After extrusion, the extruded tubes can also be worked to their final size by rolling.
- oil-based lubricating materials which may leave carbon-bearing impurities on the inner surface of the tube. It is well known that the lengthwise grooves created on the inner surface of an extruded tube may form fold-backs in the tube drawing steps. Lubricating materials used both in the extrusion and in the drawing steps can remain in said fold-backs. It has generally been found out that the carbon content of the inner surfaces cannot necessarily be adjusted to the required level by means of known degreasing washings or other solvent treatments, which causes problems for instance in the metal coating of the inner surface. Especially problems have been detected for example in the adhesion of a tin coating.
- the object of the present invention is to introduce a novel method for manufacturing copper or copper alloy tubes, in which method the inner surface of the extruded tube is subjected to a cleaning treatment before the tube is worked to its final size.
- the invention relates to a method for manufacturing copper or copper alloy tube, which method includes an extrusion step and at least one working step for working the tube to its final size, and according to which method, the tube inner surface is subjected to a cleaning treatment, so that the cleaning treatment is performed on the inner surface of the extruded tube before the tube is worked to its final size.
- a tube means an end product.
- it is possible to essentially improve the quality of the inner surface of metal tubes, such as copper tubes.
- a tube is worked to its final size by drawing an extruded tube at least in one step.
- the cleaning treatment is carried out essentially between the extrusion step and the drawing step.
- the tube is worked to its final size by rolling the extruded tube at least in one step. Now the cleaning treatment is carried out essentially between the extrusion step and the rolling step.
- the cleaning treatment is carried out mechanically.
- One method according to the invention is that the cleaning treatment is carried out by treating the inner surface of the extruded tube with a cleaning device that is made of an essentially harder material than the inner surface.
- the employed cleaning device is a steel brush. In this fashion, impurities are advantageously detached from the inner surface.
- the cleaning device is moved along the inner surface of the extruded tube by means of magnets.
- the cleaning device is moved along the inner surface of the extruded tube by means of an elongate shaft.
- the extruded tube is moved with respect to the cleaning device.
- the cleaning treatment is carried out by grain blasting, such as sand blasting.
- the inner surfaces of the extruded tube are blasted by gas.
- Another way according to the invention is that after a mechanical cleaning treatment, the inner surfaces of the extruded tube are washed by liquid.
- the tube is subjected to a coating treatment after working the tube to its final size.
- An extruded tube treated according to the invention makes it easier to perform further processing, such as metal coating.
- further processing such as metal coating.
- the carbon content of the inner surfaces of tube end products can be controlled better than in the prior art.
- savings in the expenses are achieved both in employed work and materials, as well as in the pretreatment steps that require metal coating.
- the processing of a tube that in the final measures has an outer diameter of 54 millimeters from an extruded tube by applying the method according to the invention.
- the example describes how the inner surface of the extruded tube was cleaned, and how the cleaned extruded tube behaved in test drawings in comparison with a regular uncleaned extruded tube. After test drawings and washings, the inner surface was observed by various different surface test methods. In addition, there was observed the metallic coatability of tubes manufactured according to the invention.
- the tubes under comparison were subjected to a degreasing, pickling and coating treatment.
- the layer thickness of a metallic coating was larger by about 20%, and the parameter describing the adhesion and integrity of the coating was over 5 times better in the tube that was made of the mechanically cleaned extruded tube. It was also found out that in the case of an uncleaned extruded tube, the graphite-containing drawing grooves on the inner surface were clearly visible in the coating.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Physical Vapour Deposition (AREA)
- Heat Treatment Of Articles (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602004012535T DE602004012535T2 (en) | 2003-03-07 | 2004-02-24 | Process for treating the inner surfaces of a pipe |
EA200501239A EA007545B1 (en) | 2003-03-07 | 2004-02-24 | Method for treating the inner surface of a tube |
EP04713921A EP1601472B1 (en) | 2003-03-07 | 2004-02-24 | Method for treating the inner surface of a tube |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20030344A FI115120B (en) | 2003-03-07 | 2003-03-07 | Method for treating the inner surface of a tube |
FI20030344 | 2003-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004078372A1 true WO2004078372A1 (en) | 2004-09-16 |
Family
ID=8565774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2004/000086 WO2004078372A1 (en) | 2003-03-07 | 2004-02-24 | Method for treating the inner surface of a tube |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1601472B1 (en) |
AT (1) | ATE389466T1 (en) |
DE (1) | DE602004012535T2 (en) |
EA (1) | EA007545B1 (en) |
ES (1) | ES2303941T3 (en) |
FI (1) | FI115120B (en) |
TW (1) | TW200500154A (en) |
WO (1) | WO2004078372A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1461961A (en) * | 1973-07-06 | 1977-01-19 | Liege Usines Cuivre Zinc | Method of cleaning the internal surfaces of copper tubes |
US4445350A (en) * | 1980-11-29 | 1984-05-01 | Kabushiki Kaisha Kobe Seiko Sho | Extrusion method using hot lubricant |
FR2623110A1 (en) * | 1987-11-18 | 1989-05-19 | Virax Sa | Method for mechanically cleaning the internal walls of the ends of round tubes or tubes of curvilinear section and brushing tool for implementing this method |
EP0647723A1 (en) * | 1993-10-09 | 1995-04-12 | KM Europa Metal Aktiengesellschaft | Process for manufacturing of seamless drawn medium hard/hard copper fitting tubes |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3610560B2 (en) * | 1995-02-06 | 2005-01-12 | 住友電気工業株式会社 | Waveguide manufacturing method and waveguide |
-
2003
- 2003-03-07 FI FI20030344A patent/FI115120B/en active IP Right Grant
-
2004
- 2004-02-24 AT AT04713921T patent/ATE389466T1/en not_active IP Right Cessation
- 2004-02-24 DE DE602004012535T patent/DE602004012535T2/en not_active Revoked
- 2004-02-24 EA EA200501239A patent/EA007545B1/en not_active IP Right Cessation
- 2004-02-24 WO PCT/FI2004/000086 patent/WO2004078372A1/en active IP Right Grant
- 2004-02-24 EP EP04713921A patent/EP1601472B1/en not_active Revoked
- 2004-02-24 ES ES04713921T patent/ES2303941T3/en not_active Expired - Lifetime
- 2004-02-27 TW TW093105087A patent/TW200500154A/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1461961A (en) * | 1973-07-06 | 1977-01-19 | Liege Usines Cuivre Zinc | Method of cleaning the internal surfaces of copper tubes |
US4445350A (en) * | 1980-11-29 | 1984-05-01 | Kabushiki Kaisha Kobe Seiko Sho | Extrusion method using hot lubricant |
FR2623110A1 (en) * | 1987-11-18 | 1989-05-19 | Virax Sa | Method for mechanically cleaning the internal walls of the ends of round tubes or tubes of curvilinear section and brushing tool for implementing this method |
EP0647723A1 (en) * | 1993-10-09 | 1995-04-12 | KM Europa Metal Aktiengesellschaft | Process for manufacturing of seamless drawn medium hard/hard copper fitting tubes |
Also Published As
Publication number | Publication date |
---|---|
ATE389466T1 (en) | 2008-04-15 |
EP1601472B1 (en) | 2008-03-19 |
DE602004012535T2 (en) | 2009-05-07 |
EA200501239A1 (en) | 2006-02-24 |
FI20030344A0 (en) | 2003-03-07 |
ES2303941T3 (en) | 2008-09-01 |
EP1601472A1 (en) | 2005-12-07 |
FI20030344A (en) | 2004-09-08 |
EA007545B1 (en) | 2006-10-27 |
TW200500154A (en) | 2005-01-01 |
DE602004012535D1 (en) | 2008-04-30 |
FI115120B (en) | 2005-03-15 |
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