WO2016158462A1 - Forging method - Google Patents
Forging method Download PDFInfo
- Publication number
- WO2016158462A1 WO2016158462A1 PCT/JP2016/058547 JP2016058547W WO2016158462A1 WO 2016158462 A1 WO2016158462 A1 WO 2016158462A1 JP 2016058547 W JP2016058547 W JP 2016058547W WO 2016158462 A1 WO2016158462 A1 WO 2016158462A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- workpiece
- forging
- warm
- temperature
- warm forging
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
Definitions
- the present invention relates to a forging method.
- Patent Document 1 discloses a technique for manufacturing a forged product made of an aluminum alloy by warm forging in order to increase the strength of the forged product (see Patent Document 1).
- the forged product may change over time and the hardness may not be stabilized under the usage environment of the vehicle.
- an object of the present invention is to provide a forging method that increases the strength of a forged product and suppresses a decrease in hardness under a use environment.
- the present invention provides a warm forging process in which a solution-treated metal workpiece is warm-forged at a recrystallization temperature or lower, and a use after manufacturing after the warm-forging process. And an artificial aging step for artificially pre-aging the workpiece at a temperature equal to or higher than the environmental temperature.
- the warm forging means that the workpiece is forged using a mold in a heated state and at a temperature equal to or lower than a temperature at which the structure of the metal workpiece is recrystallized (recrystallization temperature).
- the equivalent plastic strain before and after the warm forging is preferably 0.1 to 2.5.
- the equivalent plastic strain before and after forging is calculated by, for example, CAE (Ccomputer Aided Engineering) analysis.
- the equivalent plastic strain before and after the warm forging is preferably set to 0.4 to 2.1.
- the present invention it is possible to provide a forging method that increases the strength of a forged product and suppresses the change over time in the use environment.
- the forging method includes a warm forging step (S105) in which a workpiece 10 is formed by warm forging, a forged product having high strength, and a product that is used in a vehicle use environment.
- An artificial aging step (S106) for artificially pre-aging the workpiece 10 after warm forging so as not to change with time.
- a case where the workpiece 10 is made of an aluminum alloy is illustrated.
- the workpiece 10 is a generally rod-shaped tie rod that steers a knuckle that rotatably supports a wheel is illustrated.
- the manufactured workpiece 10 includes a hemispherical boss portion 11 that fits outside the knuckle ball joint, a round rod-like shaft portion 12 that is connected to the actuator side rod, the boss portion 11 and the shaft portion. 12 and a neck 13 formed between the two.
- the outer diameter of the workpiece 10 is generally reduced in the order of the shaft portion 12, the boss portion 11, and the neck portion 13.
- These equivalent plastic strains are equivalent to the equivalent plastic strain of the shaft portion 12 (0.2 etc.), the equivalent plastic strain of the boss portion 13 (0.9 etc.), based on the workpiece 10 before strain (before forging), The equivalent plastic strain (2.2 etc.) of the neck 11 increases in the order (see FIG. 9).
- step S101 an appropriately sized workpiece 10 is cut out from an aluminum alloy material (see FIG. 2A).
- step S102 the cut workpiece 10 is cold-forged and preformed (see FIG. 2B).
- Cold forging refers to forging the workpiece 10 at a temperature lower than the recrystallization temperature of the aluminum alloy and at a lower temperature (for example, lower than room temperature (about 25 ° C.)).
- step S103 the workpiece 10 after cold forging is subjected to a solution treatment. Specifically, the workpiece 10 is heated to a solution treatment temperature (for example, 540 ° C.) using an appropriate furnace so that the alloy components are dissolved in the workpiece 10 to facilitate aging precipitation and distortion due to cold forging. Eliminate.
- a solution treatment temperature for example, 540 ° C.
- step S104 the workpiece 10 after the solution treatment is heated to a warm temperature for warm forging.
- the warm heating temperature is set to normal temperature or higher and lower than the recrystallization temperature.
- the warm heating temperature is set to, for example, 100 ° C. to the recrystallization temperature or less.
- step S105 the workpiece 10 heated to a warm temperature (below the recrystallization temperature) is warm forged (see FIG. 2C).
- the equivalent plastic strain of the workpiece 10 in the forging direction is set in the normal range of 0.1 to 2.5.
- the equivalent plastic strain is preferably in a suitable range of 0.1 to 2.1 (see FIGS. 3, 4, and 5). Further, the equivalent plastic strain is preferably in the optimum range of 0.4 to 2.1. This is because the tensile strength is improved satisfactorily.
- step S106 the workpiece 10 after warm forging is artificially aged. Specifically, the workpiece 10 is artificially aged in advance at a predetermined artificial aging temperature and a predetermined artificial aging time so that the product (workpiece 10) does not change over time during use after manufacturing.
- the predetermined artificial aging temperature is set to a temperature equal to or higher than the operating environment temperature to which the product (work 10) after manufacture is exposed. This is because the change over time of the product (workpiece 10) during use after manufacture can be reduced. For example, when the manufactured product (workpiece 10) is a tie rod, the predetermined artificial aging temperature is set to 150 to 200 ° C. (see FIG. 10).
- the predetermined artificial aging time is determined by a preliminary test or the like, and is set as short as possible within a range that does not change with time after manufacture.
- step S107 the workpiece 10 after artificial aging is deburred (trimmed) (see FIG. 2D). Specifically, the burr 14 of the workpiece 10 formed by warm forging is cut off.
- step S108 the workpiece 10 after deburring is finished. Specifically, for example, the surface of the workpiece 10 is polished and cleaned.
- Such a forging method can increase the hardness of the workpiece 10 by artificially aging the workpiece 10 after warm forging (see FIG. 9). That is, since the work 10 is artificially aged, the hardness of the product (work 10) does not change and does not decrease during use after manufacture (see FIG. 10).
- the configuration in which the workpiece 10 is made of an aluminum alloy is exemplified, but a configuration in which other types of metals are used may be used.
Abstract
Description
工程S101において、アルミニウム合金製の素材から適切な大きさのワーク10を切り出す(図2(a)参照)。 <Cutting step, S101>
In step S101, an appropriately sized
工程S102において、切り出したワーク10を冷間鍛造し予備成形する(図2(b)参照)。冷間鍛造とはワーク10をアルミニウム合金の再結晶温度以下であって、低温(例えば常温(約25℃)以下)で鍛造することである。 <Cold forging process, S102>
In step S102, the
工程S103において、冷間鍛造後のワーク10を溶体化処理する。具体的には、適宜な炉を使用してワーク10を溶体化処理温度(例えば、540℃)に加熱し、合金成分をワーク10に固溶させ時効析出しやすくするとともに、冷間鍛造による歪みを排除する。 <Solution process, S103>
In step S103, the
工程S104において、溶体化処理後のワーク10を温間鍛造するための温間温度に加熱する。温間加熱温度は、常温以上であって再結晶温度以下に設定される。具体的には、本実施形態では、ワーク10がアルミニウム合金製であるので、温間加熱温度は、例えば100℃~再結晶温度以下に設定される。 <Warm heating process, S104>
In step S104, the
工程S105において、温間温度(再結晶温度以下)に加熱されているワーク10を温間鍛造する(図2(c)参照)。 <Warm forging process, S105>
In step S105, the
工程S106において、温間鍛造後のワーク10を人工時効する。具体的には、高強度化、かつ製造後の使用中に製品(ワーク10)が経時変化しないように、所定人工時効温度、所定人工時効時間にて、ワーク10を人工的に予め時効させる。 <Artificial aging process, S106>
In step S106, the
工程S107において、人工時効後のワーク10をバリ抜き(トリミング)する(図2(d)参照)。具体的には、温間鍛造で形成されたワーク10のバリ14を切除する。 <Deburring (trimming) process>
In step S107, the
工程S108において、バリ抜き後のワーク10を仕上げ処理する。具体的に例えば、ワーク10の表面を研磨、洗浄する。 <Finishing process>
In step S108, the
11 ボス部
12 軸部
13 首部
14 ボス部 10
Claims (3)
- 溶体化処理した金属製のワークを再結晶温度以下で温間鍛造する温間鍛造工程と、
前記温間鍛造工程の後、製造後における使用環境温度と同等以上の温度でワークを人工的に予め時効させる人工時効工程と、
を含む
ことを特徴とする鍛造方法。 A warm forging process in which a solution-treated metal workpiece is warm-forged at a temperature below the recrystallization temperature;
After the warm forging step, an artificial aging step for artificially pre-aging the workpiece at a temperature equal to or higher than the use environment temperature after production,
The forging method characterized by including. - 前記温間鍛造工程において、温間鍛造前後における相当塑性歪みを0.1~2.5とする
ことを特徴とする請求項1に記載の鍛造方法。 The forging method according to claim 1, wherein, in the warm forging step, the equivalent plastic strain before and after the warm forging is set to 0.1 to 2.5. - 前記温間鍛造工程において、温間鍛造前後における相当塑性歪みを0.4~2.1とする
ことを特徴とする請求項1に記載の鍛造方法。 The forging method according to claim 1, wherein, in the warm forging step, an equivalent plastic strain before and after the warm forging is set to 0.4 to 2.1.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112016001543.7T DE112016001543B4 (en) | 2015-04-02 | 2016-03-17 | Forging process |
JP2017509555A JP6371468B2 (en) | 2015-04-02 | 2016-03-17 | Forging method |
US15/562,579 US20180105909A1 (en) | 2015-04-02 | 2016-03-17 | Forging method |
CN201680018694.9A CN107427898B (en) | 2015-04-02 | 2016-03-17 | Forging method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015-075685 | 2015-04-02 | ||
JP2015075685 | 2015-04-02 |
Publications (1)
Publication Number | Publication Date |
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WO2016158462A1 true WO2016158462A1 (en) | 2016-10-06 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2016/058547 WO2016158462A1 (en) | 2015-04-02 | 2016-03-17 | Forging method |
Country Status (5)
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US (1) | US20180105909A1 (en) |
JP (1) | JP6371468B2 (en) |
CN (1) | CN107427898B (en) |
DE (1) | DE112016001543B4 (en) |
WO (1) | WO2016158462A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110076523A (en) * | 2019-04-04 | 2019-08-02 | 苏州胜利精密制造科技股份有限公司 | A kind of manufacturing method of laptop case |
CN114769482A (en) * | 2022-03-01 | 2022-07-22 | 东莞领益精密制造科技有限公司 | Moderate-strength aluminum alloy isothermal die forging process |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008196009A (en) * | 2007-02-13 | 2008-08-28 | Toyota Motor Corp | Method for manufacturing aluminum alloy material, and heat treatment type aluminum alloy material |
JP2010137284A (en) * | 2008-11-13 | 2010-06-24 | Tobata Turret Kosakusho:Kk | Isothermal forging method and isothermal forging device |
JP2014218685A (en) * | 2013-05-01 | 2014-11-20 | 本田技研工業株式会社 | Al-Mg-Si BASED ALLOY MEMBER AND METHOD FOR PRODUCING THE SAME |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5219176A (en) * | 1989-11-02 | 1993-06-15 | James Mitchell | One-piece steering knuckle assembly |
US20050111908A1 (en) * | 2003-11-24 | 2005-05-26 | Green Steve J. | Tie rod end |
EP1911612A1 (en) * | 2006-10-13 | 2008-04-16 | Industria Auxiliar Alavesa, S.A. (Inauxa) | Suspension arm for a motor vehicle wheel suspension |
KR101423447B1 (en) * | 2010-12-22 | 2014-07-24 | 쇼와 덴코 가부시키가이샤 | Method for producing formed material for brake piston |
WO2013172912A2 (en) * | 2012-03-07 | 2013-11-21 | Alcoa Inc. | Improved aluminum-lithium alloys, and methods for producing the same |
JP5837026B2 (en) * | 2013-03-29 | 2015-12-24 | 株式会社神戸製鋼所 | Aluminum alloy forgings for automobiles and manufacturing method thereof |
-
2016
- 2016-03-17 CN CN201680018694.9A patent/CN107427898B/en active Active
- 2016-03-17 WO PCT/JP2016/058547 patent/WO2016158462A1/en active Application Filing
- 2016-03-17 US US15/562,579 patent/US20180105909A1/en not_active Abandoned
- 2016-03-17 JP JP2017509555A patent/JP6371468B2/en active Active
- 2016-03-17 DE DE112016001543.7T patent/DE112016001543B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008196009A (en) * | 2007-02-13 | 2008-08-28 | Toyota Motor Corp | Method for manufacturing aluminum alloy material, and heat treatment type aluminum alloy material |
JP2010137284A (en) * | 2008-11-13 | 2010-06-24 | Tobata Turret Kosakusho:Kk | Isothermal forging method and isothermal forging device |
JP2014218685A (en) * | 2013-05-01 | 2014-11-20 | 本田技研工業株式会社 | Al-Mg-Si BASED ALLOY MEMBER AND METHOD FOR PRODUCING THE SAME |
Also Published As
Publication number | Publication date |
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JPWO2016158462A1 (en) | 2017-11-09 |
DE112016001543T5 (en) | 2017-12-21 |
CN107427898B (en) | 2019-05-10 |
JP6371468B2 (en) | 2018-08-08 |
CN107427898A (en) | 2017-12-01 |
DE112016001543B4 (en) | 2021-03-11 |
US20180105909A1 (en) | 2018-04-19 |
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