JP5004324B2 - 磁性体を含む金型の補修方法 - Google Patents
磁性体を含む金型の補修方法 Download PDFInfo
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- JP5004324B2 JP5004324B2 JP2006163048A JP2006163048A JP5004324B2 JP 5004324 B2 JP5004324 B2 JP 5004324B2 JP 2006163048 A JP2006163048 A JP 2006163048A JP 2006163048 A JP2006163048 A JP 2006163048A JP 5004324 B2 JP5004324 B2 JP 5004324B2
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- mold
- magnetic flux
- magnetic field
- machining
- residual stress
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また、さらに現場で数多く使用される金型について個々に必要な個所の温度測定を行い、計算で予測を行うには、手間のほかに熟練と知識が必要となり、有効な方法とは考えられない。
Impedance)素子を用い、該金型の表面を、3次元的に移動走査させて磁場強度と磁場ベクトルを検出することを特徴とする。又、ワイヤー放電加工において、ワイヤーの切り込み位置や移動方向を簡便に評価するために、上記と同様の検査方法を用い、加工履歴に依存した磁場の符号の向きや変化から、加工履歴の情報を得ることを特徴とする。
またこのセンサーには、1mm程度センサー位置よりも飛び出た形で柔らかく弾性変形可能な金属の針が併設してある。金型試料と金属針間の電気伝導測定により、センサーの金型表面からの距離が1mm以下の一定に保たれるように工夫されている。センサーと試料との関係を図2に示す。
一般に、SKD鋼や粉末ハイスは、超硬合金に比べ柔らかく、ヤング率や降伏応力も低いことから、一定の熱応力に対して、深い加工影響部が残ることが知られており、今回の結果は、従来の報告である非特許文献3とも一致する。以上の結果から、本発明が表面加工層の残留応力の半定量化に有用であり、これを元に金型表面の研削による補修加工に適切な深さの情報を与えうることが分かる。
2 3次元磁束密度センサー制御部
3 制御用コンピューター
4 自動XYZステージ
5 試料
6 試料保持部
7 センサー位置調整部
8 センサー保持棒
9 探針
10 放電加工または研削加工を施した面
11 放電加工または研削加工を施した後、50μm除去加工を施した面
12 放電加工または研削加工を施した後、100μm除去加工を施した面
13 放電加工または研削加工を施した後、150μm除去加工を施した面
14 磁化率(テスラ)
15 2次元磁束ベクトルの渦
Claims (3)
- 磁性体を含む材料よりなる金型において、これを作製する際および使用時に逆磁歪現象により金型表面に生成する磁場ベクトルおよび磁場強度を磁束密度センサーを用いて測定する第1ステップと、測定した磁場ベクトルおよび磁場強度の分布から残留応力の分布を導出する第2ステップと、残留応力の分布に基づいて機械的又は化学的に残留応力を除去する第3ステップとで構成される金型の補修方法。
- 前記第2ステップにより得られた磁場ベクトルの特異点および磁場強度の低下度合いから表面近傍の亀裂や異物の位置を導出することを特徴とする請求項1に記載の金型の補修方法。
- 磁性体を含む材料よりなる金型について、これをワイヤー放電加工により作製する際に、逆磁歪現象により金型表面に生成した磁場ベクトルおよび磁場強度を磁束密度センサーを用いて測定することにより、ワイヤー放電加工におけるワイヤーの位置や移動方向などの加工履歴を明らかにする評価方法。
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JP2006163048A JP5004324B2 (ja) | 2006-06-13 | 2006-06-13 | 磁性体を含む金型の補修方法 |
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JP2006163048A JP5004324B2 (ja) | 2006-06-13 | 2006-06-13 | 磁性体を含む金型の補修方法 |
Publications (2)
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JP2007331140A JP2007331140A (ja) | 2007-12-27 |
JP5004324B2 true JP5004324B2 (ja) | 2012-08-22 |
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JP2006163048A Expired - Fee Related JP5004324B2 (ja) | 2006-06-13 | 2006-06-13 | 磁性体を含む金型の補修方法 |
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Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009198251A (ja) * | 2008-02-20 | 2009-09-03 | Mie Univ | 自発磁化により鉄鋼材料の焼入れ範囲を評価する方法 |
JP5526627B2 (ja) * | 2009-07-03 | 2014-06-18 | 株式会社ジェイテクト | 加工変質層検出装置 |
CN104374499B (zh) * | 2014-11-17 | 2017-01-18 | 西安交通大学 | 基于xjtuom三维光学面扫描测量系统对于焊接残余应力测量方法 |
CN111590265A (zh) * | 2020-05-25 | 2020-08-28 | 哈尔滨鑫润工业有限公司 | 基于激光扫描技术的模具修复方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63311165A (ja) * | 1987-06-12 | 1988-12-19 | Kawasaki Steel Corp | 磁気探傷方法及び装置 |
JP2002122572A (ja) * | 2000-10-17 | 2002-04-26 | Koji Yamada | 材料特性評価方法及び装置 |
JP4113681B2 (ja) * | 2001-03-15 | 2008-07-09 | 学校法人東京理科大学 | 非破壊検査方法及び非破壊検査装置 |
JP3396219B1 (ja) * | 2002-06-20 | 2003-04-14 | 山梨県 | 熱間金型の疲労度検出方法および装置 |
JP4044891B2 (ja) * | 2003-12-09 | 2008-02-06 | 新日本製鐵株式会社 | 磁界解析方法及びコンピュータプログラム |
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