WO2004103596A1 - 中空軽金属部材の押出し加工方法、中空押出し加工用ダイス、及び中空軽金属押出し部材 - Google Patents
中空軽金属部材の押出し加工方法、中空押出し加工用ダイス、及び中空軽金属押出し部材 Download PDFInfo
- Publication number
- WO2004103596A1 WO2004103596A1 PCT/JP2004/006601 JP2004006601W WO2004103596A1 WO 2004103596 A1 WO2004103596 A1 WO 2004103596A1 JP 2004006601 W JP2004006601 W JP 2004006601W WO 2004103596 A1 WO2004103596 A1 WO 2004103596A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light metal
- die
- hollow
- extruding
- metal material
- Prior art date
Links
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
- 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
-
- 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
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
Definitions
- the male die 4a has a plurality of entry ports 6 (four in the figure, one of which is omitted in the figure) formed in the circumference thereof, and a central part thereof. From the male bearing 7a (mandrel) toward the downstream side in the extrusion direction (female die 4b side). Part protrudes.
- the female die 4b is provided with a substantially cross-shaped welding chamber 8 corresponding to each entry port 6 of the male die 4a, and a female die 4b is provided at a central position of the welding chamber 8.
- a female bearing 7b which is a hole penetrating in the axial direction, is provided.
- the light metal material 1 pressed from the direction of the arrow A is pushed into the four entry ports 6 of the female die 4b and is diverted to each entry port 6. That is, the light metal material 1 is divided into four parts 1a, lb, 1c, and Id. After passing through the entry one port 6, the branch portions l a to l d merge in the welding chamber 8 of the next female die 4b, where they are welded to each other and integrated again.
- the integrated light metal material 1 comprises an outer peripheral surface of a male bearing 7a having a rectangular cross section, and a female bearing 7b having a rectangular cross section into which the male bearing 7a is fitted with a gap.
- the hollow member (rectangular tube) 5 having a rectangular hollow cross section corresponding to the shape of the gap is formed. Therefore, the formed hollow member 5 has welded portions 5a at the four ridges.
- the hollow member 5 which is a product obtained by this method is extruded through a “diversion” and “merging / welding” processes which are not available in a method using a normal solid die.
- the welded portion 5a corresponding to the number and position of the entry 1 port 6 of the aerodynamic pull die 4 always exists.
- the metallurgical adhesion between the welded portion and the bare portion (non-welded portion) largely governs mechanical properties such as tensile strength, proof stress, and elongation of the hollow member, particularly strength. If the adhesion of the welded part is insufficient, it will cause cracking and deformation during the subsequent secondary processing and during use of the product, and the quality may not be guaranteed sufficiently.
- Extrusion processing using a bridge die, among other hollow dies has the advantage that the die life is longer than other hollow dies, but has the disadvantage that it is difficult to secure the strength of the welded portion.
- JIS3000 and JIS600 there are few problems that do not require relatively high strength, such as JIS3000 and JIS600, but high strength such as JIS700
- JIS700 In the case of required products, it is very difficult to ensure sufficient strength in the weld due to their metallurgical properties.
- JIS 500 series extrusion using hollow dies is said to be impossible in the industry, and even development has been abandoned.
- the present invention solves at once a basic problem in the strength of the welded portion in the extrusion process using a hollow die such as a bridge die, and provides a hollow light metal member having excellent mechanical properties.
- the aim is to realize and establish a new extrusion process technology that can produce products that meet the required strength level, etc. at a low cost and at the same time stably produce products. It is a thing. Disclosure of the invention
- the present invention employs the following configuration.
- strain amount here means the average value of the equivalent strain distribution amount generated in the light metal material from the section of the welding chamber to the section of the product at the die exit. By maintaining such a strain amount of 1.8 or more, it becomes possible to increase the tensile strength of the welded part of the product to a strength almost close to the tensile strength of the bare part.
- this method can be applied to various light metal materials, it is particularly effective when the metal constituting the hollow light metal member is an aluminum alloy.
- the present invention provides a method for extruding a hollow light metal member, wherein the light metal material is extruded into a desired cross-sectional shape after the light metal material is separated, merged and welded, using a hollow extrusion die.
- the present invention also provides a hollow extruded die used for extrusion of a hollow light metal member which is extruded into a desired cross-sectional shape after the light metal material is subjected to diversion, confluence, and welding. It is designed so that extrusion can be performed while maintaining the applied strain at 1.8 or more.
- a bridge die, a porthole die, or a spider die is preferable.
- the present invention is a hollow light metal member obtained by extruding a light metal material into a desired cross-sectional shape after performing splitting, merging and welding, wherein the light metal material after the confluence-welding is subjected to distortion. It is obtained by extruding while maintaining the amount at 1.8 or more, and the strength of the welded portion is 90% or more of the strength of the bare portion.
- FIG. 1 (a) is a perspective view showing an example of a hollow die used for hollow extrusion molding
- FIG. 1 (b) is a sectional front view of the die.
- FIGS. 3 (a) and 3 (b) are partial cross-sectional front views for explaining dimensions of various hollow dies.
- FIG. 5 is an explanatory sectional view showing the outline of the hollow extrusion device.
- FIG. 6 is a partially sectional perspective view showing an example of a hollow die used in the hollow extrusion device.
- the present inventors have conducted experiments and studies focusing on factors that influence the strength of the welded portion with the aim of solving the above-mentioned problems, and it is generally assumed that this is quantitatively controlled. Instead of determining the temperature of the product, the amount of strain experienced by the light metal material at a specific location in the hollow die was determined. Furthermore, as a result of research, it was also experimentally confirmed that when the amount of distortion exceeds a certain threshold value, the strength of the welded part is improved to a strength close to the strength of the bare part (part not involved in welding). I was able to find out.
- the relationship between the amount of distortion and the shape and structure of the hollow die is quantified, and the results are reflected in the die design to obtain a high quality hollow member with high welding strength. It was found that it is possible to manufacture hollow members that meet various required strength levels, as well as to be able to do so.
- the present inventors first determined what kind of deformation was caused in the process in which the material billet pressurized and supplied into the container was extruded as a product through the hollow die. I decided to consider the change in the cross-sectional area.
- FIGS. 1 (a) and 1 (b) show examples of a bridge type die 4, and FIGS. 2 (a) to 2 (d) show a metal (a billet forming part) at each part of the die. 2) is a model showing the existence region of the material), that is, the cross-sectional shape.
- the surrounding outer wall and other members constituting the die 4 are omitted for convenience.
- the die 4 has a male die 4a and a female die 4b that are fitted to each other.
- the male die 4a integrally has a cross-shaped bridge body 41 and legs 42b projecting downward from four ends of the bridge body 41, and extends downward from the center of the bridge body 41.
- Male bearing 7a protrudes.
- the female die 4b has, on its upper surface, a concave portion 43 into which each leg 42 of the male die 4a is fitted, and a hole passing through the female die 4a in the axial direction at the center of the bottom surface of the concave portion 43.
- the female bearing 7b is provided. The relative relationship between the two bearings 7a and 7b is the same as that shown in FIGS. 5 and 6.
- the light metal material 1 formed as a billet in the same manner as the device shown in FIG. 5 enters the container from the direction of arrow A, and finally is extruded as a product in the direction B.
- the cross-sectional shape of the light metal material 1 changes remarkably, but Fig. 2 shows the change of the cross-sectional shape in the sector-shaped area S with a central angle of 45 ° shown in Fig. It is shown. '
- Fig. 2 (a), (b), (c), and (d) show the heights of lines 1-1, 2-2, 3-3, and ⁇ -4 shown in Fig. 1 (b), respectively.
- 2 shows the cross-sectional shape of the light metal material 1 at the position of the right.
- the light metal material 1 has a part that flows on the center side in the die 4 and a part that is left outside and stays without flowing, as shown in FIG. 2 (a) (b) In (c) and (d), the flowing portion 1a of the light metal material 1 is a fine mesh portion, and the non-fluid portion 1b is a coarse mesh portion. Shown.
- the flowing portion 1a of the light metal material 1 occupies the entire cross-sectional area, but the position of the 2-2 line, ie, At the position where the bridge body 41 is present and above the legs 42, the light metal material 1 is diverted to four places as shown in FIG. 2 (b) due to the presence of the bridge body 41.
- the sectional area is reduced correspondingly to the opening area between the bridge bodies 41.
- the metal cross-sectional area is reduced by the area of the gap formed between the bearings 7a and 7b as shown in Fig. 2 (d). Due to the restriction, the cross-sectional area shown in Fig. 2 (c) is significantly reduced.
- strain amount means the average value of the equivalent strain distribution amount from the cross section of the welding chamber to the cross section of the die exit part as described above.
- FIG. 3 (a) shows the dimensions of a bridge die or a spider die having a bridge body 41
- FIG. 3 (b) shows the dimensions of a porthole die having an entry port 6;
- X is the position of the entry port surface
- Y is the position of the upper surface of the welding chamber (top of the junction)
- Z is the position of the die opening surface.
- the present inventors considered the relationship between the welding strength and the amount of strain and the controlling factors thereof, and, based on the considerations and considerations, aimed at confirming whether or not this could be effectively applied in actual technology.
- Extrusion experiments were performed using various types of hollow dies having various shapes using aluminum alloys as test materials, and the amount of strain and the tensile strength of the resulting hollow members were measured.
- Table 1 below shows the experimental conditions
- Table 2 shows the experimental results.
- Test material thickness of aluminum die
- FIG. 4 is a graph in which the relationship between the amount of strain and the welding strength is similarly arranged by increasing the N number by adding the results of additional experiments to these results.
- the solid line parallel to the X axis where the tensile strength ratio between the welded part and the bare part is 100% indicates the tensile strength of the bare part (non-welded part)
- the dotted line curve indicates the tensile strength of the welded part. Each represents the strength.
- the correlation between the amount of strain and the welding strength is determined in advance, the strain amount corresponding to the target welding strength is determined based on the correlation, and this strain amount is used as the target strain amount.
- a hollow extrusion die is designed so that the amount of strain given to the light metal material is maintained at or above the target amount of distortion from the stage after the joining and welding to the stage after extrusion molding. By performing the extrusion molding by using this, it becomes possible to stably obtain a hollow light metal extruded member having a sufficient welding strength.
- the excellent effects of the present invention were demonstrated for aluminum alloys.
- the present invention is applicable to the extrusion of other light metals (including alloys) such as tin, antimony, titanium, magnesium, and beryllium. The same effect can be obtained even if this is done.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK04732202.9T DK1637246T3 (da) | 2003-05-23 | 2004-05-11 | Fremgangsmåde til ekstrudering af hult letmetalelement |
EP04732202A EP1637246B1 (en) | 2003-05-23 | 2004-05-11 | Method of extruding hollow light metal member |
AT04732202T ATE549104T1 (de) | 2003-05-23 | 2004-05-11 | Verfahren zum extrudieren eines hohlen leichtmetallelements |
US10/556,800 US7237418B2 (en) | 2003-05-23 | 2004-05-11 | Method of extruding hollow light metal member, die for extruding hollow light metal, and member for extruding hollow light metal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-146839 | 2003-05-23 | ||
JP2003146839 | 2003-05-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004103596A1 true WO2004103596A1 (ja) | 2004-12-02 |
Family
ID=33475313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/006601 WO2004103596A1 (ja) | 2003-05-23 | 2004-05-11 | 中空軽金属部材の押出し加工方法、中空押出し加工用ダイス、及び中空軽金属押出し部材 |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1637246B1 (ja) |
KR (1) | KR100674779B1 (ja) |
CN (1) | CN100366356C (ja) |
AT (1) | ATE549104T1 (ja) |
DK (1) | DK1637246T3 (ja) |
TW (1) | TWI251513B (ja) |
WO (1) | WO2004103596A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5010196B2 (ja) * | 2006-07-18 | 2012-08-29 | 株式会社神戸製鋼所 | 耐熱アルミ合金製の形材の製造方法、耐熱アルミ合金製の形材及び耐熱アルミ合金製の形材の成形装置 |
DE102020128163B3 (de) * | 2020-10-27 | 2022-02-17 | Helmholtz-Zentrum Hereon Gmbh | Formwerkzeug und Verfahren zum Strangpressen von metallischen Werkstoffen |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002185151A (ja) * | 2000-12-19 | 2002-06-28 | Oki Electric Ind Co Ltd | 多層プリント配線板 |
JP2003013191A (ja) * | 2001-06-28 | 2003-01-15 | Ngk Insulators Ltd | アルミニウムを主成分とする金属製直管及びその製造方法、並びに検査方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3520168A (en) * | 1966-08-01 | 1970-07-14 | Dow Chemical Co | Feederhole die |
US3575030A (en) * | 1967-11-01 | 1971-04-13 | Dow Chemical Co | Slanted weld extrusion process |
CN2155964Y (zh) * | 1993-06-02 | 1994-02-16 | 蔡志忠 | 铝挤压型管材成型模具 |
JP4174173B2 (ja) * | 2000-07-03 | 2008-10-29 | 株式会社神戸製鋼所 | 中空断面金属製品の押出方法および押出装置 |
-
2004
- 2004-05-11 CN CNB2004800140459A patent/CN100366356C/zh not_active Expired - Fee Related
- 2004-05-11 KR KR1020057022346A patent/KR100674779B1/ko active IP Right Grant
- 2004-05-11 WO PCT/JP2004/006601 patent/WO2004103596A1/ja active Application Filing
- 2004-05-11 DK DK04732202.9T patent/DK1637246T3/da active
- 2004-05-11 EP EP04732202A patent/EP1637246B1/en not_active Expired - Lifetime
- 2004-05-11 AT AT04732202T patent/ATE549104T1/de active
- 2004-05-17 TW TW093113864A patent/TWI251513B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002185151A (ja) * | 2000-12-19 | 2002-06-28 | Oki Electric Ind Co Ltd | 多層プリント配線板 |
JP2003013191A (ja) * | 2001-06-28 | 2003-01-15 | Ngk Insulators Ltd | アルミニウムを主成分とする金属製直管及びその製造方法、並びに検査方法 |
Also Published As
Publication number | Publication date |
---|---|
TW200425967A (en) | 2004-12-01 |
EP1637246B1 (en) | 2012-03-14 |
CN100366356C (zh) | 2008-02-06 |
EP1637246A4 (en) | 2008-06-18 |
CN1795063A (zh) | 2006-06-28 |
DK1637246T3 (da) | 2012-05-29 |
KR20060004699A (ko) | 2006-01-12 |
ATE549104T1 (de) | 2012-03-15 |
KR100674779B1 (ko) | 2007-01-25 |
TWI251513B (en) | 2006-03-21 |
EP1637246A1 (en) | 2006-03-22 |
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