詳細検索結果

ジグ研削の被削材除去機構に及ぼすクイル運動の影響

坂本博宣, 峠睦, 松尾哲夫

日本機械学会論文集 C編
1995年 61 巻 591 号 4523-4528
発行日: 1995/11/25
公開日: 2008/02/26

DOI https://doi.org/10.1299/kikaic.61.4523

ジャーナルフリー

抄録を表示する抄録を非表示にする

In the previous report⁽¹⁾, it was reported that a clear reduction in grinding forces was caused by quill motion and a better surface finish could be obtained. In this report, the chip formation mechanism was investigated by observation of SEM photographs of the ground workpiece. The main results obtained are as follows. ( 1 ) The straight groove is formed on the workpiece in conventional jig grinding, while overlapped grooves are observed in chop jig grinding. ( 2 ) It is evident that the higher quill speed expands the pitch between overlapped grooves, which generates a larger chip, and vice versa. ( 3 ) The chip formation mechanism by a grinding wheel is quite similar to that of a single-grain mounted wheel. ( 4 ) The roughness of the ground surface in the longitudinal direction can be determined in relation to quill speed and feed rate. However, the surface roughness in the vertical direction can be determined by quill speed.
抄録全体を表示

PDF形式でダウンロード (658K)
微小ねじ歯車の負荷特性に関する基礎研究

（りん青銅および合金工具鋼の組み合わせの場合）

*塚本匠, 髙橋美喜男, 板垣貴喜, 前田慶次

年次大会
2023年 2023 巻 S111-10
発行日: 2023年
公開日: 2024/03/25

DOI https://doi.org/10.1299/jsmemecj.2023.S111-10

会議録・要旨集認証あり

抄録を表示する抄録を非表示にする

In order to confirm the effect of material on the load-carrying-capacity, we compare the failure modes and load-carrying-capacities of phosphor-bronze micro-crossed-helical-gear, alloy-tool-steel micro-crossed-helical-gear and micro-crossed-helical-gear consisting of phosphor-bronze and alloy-tool-steel. We carried out acceleration endurance test on a crossed-helical-gear with a 0.2 mm module under the lubricant dropping condition only at the start of the experiment. As a result, in case of phosphor-bronze micro-crossed-helical-gear, extremely minute wear powder was spread thinly over the entire tooth surface, which was quite different from the tendency of wear powder in the alloy-tool-steel micro-crossed-helical-gear and micro-crossed-helical-gear consisting of phosphor-bronze and alloy-tool-steel. In case of alloy-tool-steel micro-crossed-helical-gear, At the stage where wear has not progressed and there are not many scratches on the tooth surface, the tooth surface does not retain the lubricant well and the lubricant may be discharged outside the tooth surface. The phosphor-bronze micro-crossed-helical-gear had failed tooth tips due to progressive wear, the alloy-tool-steel-micro-crossed-helical-gears had failed by plastic flow due to extremely high maximum hertzian pressure without progressive wear. On the other hand, the micro-crossed-helical-gear consisting of phosphor-bronze and alloy-tool-steel had failed due to localized high contact pressure caused by tooth tip interference. Therefore, the failure mode was different on the material.

抄録全体を表示

PDF形式でダウンロード (1131K)
合金工具鋼
の被削性について (第 1 報)

谷口和雄, 長見茂

精密機械
1964年 30 巻 355 号 645-651
発行日: 1964/08/05
公開日: 2009/10/08

DOI https://doi.org/10.2493/jjspe1933.30.645

ジャーナルフリー

抄録を表示する抄録を非表示にする

This report is dealt with comparison of machinability between SKD 11 which is JIS standard Alloy Steel, SKD 11 F-A which is added lead to SKD 11 and SKD 11 F-B which is added selenium to SKD 11.
In this report authors called SKD 11 as Base Alloy Steel, and called SKD 11 F-A and SKD 11 F-B as Free-cutting Alloy Steel. As the result of tests, the following has been found.
(1) For Free-cutting Alloy Steel, chips were curled with smaller curvature and cut in shorter length than chips of Base Alloy Steel. Therefore Free-cutting Alloy Steel were improved upon formation of chips.
(2) Free-cutting Alloy Steel showed smaller cutting forces and smaller coefficient of friction on rake face of tool than those of Base Alloy Steel.But shear stress on shear plane which were calculated with cutting forces, were almost same values between Base Alloy Steel and Free-cutting Alloy Steel.
(3) For Free-cutting Alloy Steel, tool-lives were improved in the range of low cutting speed (less than 80 m/min) but were not improved in the range of high cutting speed (more than 80 m/min).
In the range of high cutting speed, chipping wears were brought on the tools.
Consequently machining characteristics of Free-cutting Alloy Steel were improved, but the difference were not noticed between the effect of lead and selenium.
抄録全体を表示

PDF形式でダウンロード (7666K)
ホットスタンピング用熱間せん断工具の開発

古閑伸裕

天田財団助成研究成果報告書
2018年 31 巻 75-78
発行日: 2018年
公開日: 2019/09/02

DOI https://doi.org/10.32163/amadareport.31.0_75

研究報告書・技術報告書フリー

PDF形式でダウンロード (1599K)
金属粉末射出成形法による焼結
合金工具鋼
の組織および機械的性質に及ぼす粉末特性の影響

中山英樹, 京極秀樹, 小松眞一郎

粉体および粉末冶金
2000年 47 巻 12 号 1272-1276
発行日: 2000/12/15
公開日: 2009/05/22

DOI https://doi.org/10.2497/jjspm.47.1272

ジャーナルフリー

抄録を表示する抄録を非表示にする

The effects of powder characteristics on the microstructures and mechanical properties of sintered alloy tool steel (SKD11) compacts by metal injection molding were investigated. A gas-atomized(GA)and a water-atomized(WA)alloy tool steel powders and a polyamide binder were used. They were mixed well and injected into metallic molds for transverse test specimens. These injection-molded specimens were debound at 593 K in air and then were sintered at various temperatures between 1473 K and 1483 K in vacuum. These sintered compacts were heated at 1293 K and quenched, and then were tempered at various temperatures between 453 K and 803 K. The densification of the GA powder compact was fairly superior to that of the WA powder compacts. Consequently, the mechanical properties of the sintered GA powder compacts were superior to those of the sintered WA powder compacts. The mechanical properties equivalent to those of the wrought alloy tool steel could be fabricated successfully by controlling the sintering and heat-treatment conditions precisely.
抄録全体を表示

PDF形式でダウンロード (8203K)
半溶融プロセシングによる高
合金工具鋼
の省エネルギー製造の学問体系化と技術開発に関する研究

孟毅

天田財団助成研究成果報告書
2016年 29 巻 240-245
発行日: 2016年
公開日: 2021/03/03

DOI https://doi.org/10.32163/amadareport.29.0_240

研究報告書・技術報告書フリー

PDF形式でダウンロード (1638K)
熱間金型用
合金工具鋼
および耐熱鋼の常温と高温におけるすべり摩擦の挙動について

辻栄一, 安藤裕治

日本機械学會論文集
1977年 43 巻 367 号 773-780
発行日: 1977/03/25
公開日: 2008/03/28

DOI https://doi.org/10.1299/kikai1938.43.773

ジャーナルフリー

PDF形式でダウンロード (995K)
合金工具鋼
へのニッケル合金のレーザ肉盛特性

片岡義博

鋳造工学
2005年 77 巻 10 号 709-713
発行日: 2005/10/25
公開日: 2015/01/10

DOI https://doi.org/10.11279/jfes.77.709

ジャーナルフリー

抄録を表示する抄録を非表示にする

CO₂ laser beam was applied to the cladding of nickel alloy on alloy tool steel by a preplaced powder method. The hardness and microstructure of the clad layer were investigated by changing the power of laser and number of clad layers. The average hardness of the clad layer was 240 to 260 HV0.1 under the following conditions: laser power of 2200W to 3100W, cladding speed of 400mm/min, defocusing distance of 30mm. oscillation width of 7mm and argon gas shielding. The microstructure of clad layer showed fine dendrites of which secondary dendrite arm spacing was 5μm because of their rapid solidification. A heat affected zone was produced near the clad layer on the surface of the alloy tool steel and their martensitic structure was observed. The clad layer was then heat treated again with the CO₂ laser beam, but the hardness of the clad layer remained unchanged. EPMA line analysis indicated that an alloyed layer with 30μm in thickness exists between the clad layer and substrated base metal. These results suggest that CO₂ laser beam cladding of nickel alloy is a useful surface treatment process for alloy tool steel.
抄録全体を表示

PDF形式でダウンロード (3350K)
摩擦発熱したパンチによる温間深絞り加工

*髙原太樹, 原田泰典

年次大会
2022年 2022 巻 J131p-09
発行日: 2022年
公開日: 2023/03/25

DOI https://doi.org/10.1299/jsmemecj.2022.J131p-09

会議録・要旨集認証あり

抄録を表示する抄録を非表示にする

Warm processing was performed by frictional heat generation between different materials installed inside the punch. Forming with press machine is a technology for processing materials by applying heat and force, and is an important technology for industrial machines such as automobiles and electronic devices. For light metals such as aluminum alloys and magnesium alloys, it may be difficult to form depending on the type of alloy in cold deep drawing. As a method of improving formability, warm working is performed in which the metal die heated and deep drawing is performed. However, warm working requires many control devices such as heating and cooling for the mold. Using a prototype punch with a built-in friction heat generation jig, friction heat was generated by combining several types of steel materials. The changes in the exothermic temperature were mainly investigated in the combination of different materials. The test materials were carbon steel, tool steel, and stainless steel. The heat generation temperature generated by friction was measured by a thermocouple installed inside the heat generation jig. The friction surface of the jig after frictional heat generation was observed by a microscope. In frictional heating, the temperature of the processed area reached more than 350 °C in a few minutes. The proposed method was able to heat the punch. After frictional heating, the load of deep drawing of pure aluminum sheet decreased. It was found that there is a possibility of improving workability by warm deep drawing.

抄録全体を表示

PDF形式でダウンロード (849K)
パルスYAGレーザによる溶接部の熱処理

パルスYAGレーザによるマイクロ補修溶接の研究(第2報)

渡辺健彦, 山田善治, 田村武夫

溶接学会論文集
2001年 19 巻 3 号 433-439
発行日: 2001/08/05
公開日: 2009/06/12

DOI https://doi.org/10.2207/qjjws.19.433

ジャーナルフリー

抄録を表示する抄録を非表示にする

This study describes laser heat treatment of alloy tool steels SKD11 using pulsed YAG laser. When filler metal SUJ2 is welded to base metal SKD11 which metal is material of rotary cutter, the hardness of weld metal become lower than that of the base metal.
In order to improve the hardness of weld metal which become lower than that of the base metal after laser welding, heat treatments using an electric furnace and pulsed YAG laser were carried out after laser welding, then examined the variation of hardness of weld metal after heat treatments. The obtained results are as follows.
In the heat treatment using an electric furnace, the hardness of weld metal which become low against the base metal after laser welding become higher than that of the base metal under the conditions of heat treatment holding temperature at 180°C and holding time from 30 s to 120 s, then take out the weld metal from the electric furnace and cooling from furnace temperature to room temperature.
In the heat treatment using pulsed YAG laser, after laser welding in succession laser beam radiate at the surface of weld metal, the hardness of weld metal which become low against the base metal after laser welding become the same hardness as the base metal under the conditions of holding temperature at 180°C and holding time from 30 s to 120 s, then cooling to room temperature.
抄録全体を表示

PDF形式でダウンロード (5537K)
合金工具鋼
へのニッケル合金のレーザ肉盛特性

片岡義博, 芦中辰也, 宮﨑俊行, 梅田高照

鋳造工学全国講演大会講演概要集
2005年 146 巻 80
発行日: 2005年
公開日: 2017/12/01

DOI https://doi.org/10.11279/jfeskouen.146_89

会議録・要旨集フリー

PDF形式でダウンロード (823K)
円弧歯形かさ歯車をもつ傾斜歯車減速装置の振動特性

大西宏征, 長嵜羊一, 藤井亮

日本機械学会論文集 C編
2008年 74 巻 740 号 760-765
発行日: 2008/04/25
公開日: 2011/03/04

DOI https://doi.org/10.1299/kikaic.74.760

ジャーナルフリー

抄録を表示する抄録を非表示にする

Using the reduction gears with inclined planetary gear and arc tooth bevel gear, the vibrational accelerations in vertical direction of this system, with and without the backlash, are measured by changing the load torque and the input shaft speed. And, the materials of cylindrical pin attaching part of fixed and output gears are changed to alloy tool steel and cast iron, and the vibrational accelerations of this system are measured, and the results are discussed. The results are as follows : In the vibration characteristics of this system, meshing frequency component is main, and the natural frequencies caused by the torsional vibration of gears and the vibration of casing supporting the input shaft, are appeared. The vibrational acceleration of the system without the backlash is slightly lower than that with the backlash. Meshing frequency component has remarkably appeared in the vibrational acceleration, when the material in the cylindrical pin attaching part was changed from alloy tool steel to cast iron. However, in this system, the effect of the high damping capacity of gray cast iron has not appeared.
抄録全体を表示

PDF形式でダウンロード (901K)
小出カレーザによる機上焼入れに関する研究

喜田義宏, 藤川泰, 廣垣俊樹, 中川平三郎, 垣野義昭, 山路伊和夫

精密工学会誌
1999年 65 巻 3 号 391-395
発行日: 1999/03/05
公開日: 2009/04/10

DOI https://doi.org/10.2493/jjspe.65.391

ジャーナルフリー

抄録を表示する抄録を非表示にする

This study describes laser heat treatment of die steels using YAG laser on-the-machine tool. An optical fiber has been used in order to transmit the laser light from a source to workpieces at this system. At first, the temperatures based on a theoretical model during laser irradiation were estimated in order to predict the hardened range of workpieces. Second, experiments of laser heat treatment were carried out for various die steels in order to grasp the relationship between the hardened depth and irradiation conditions. Finally, a method to repeat laser irradiation at the same area was proposed to increase the hardened depth. As a result, the detail of the hardened depth for various die steels becomes clear under various laser irradiation conditions. It is found that this heat treatment of die steels with YAG laser on-the-machine tool is an effective method.
抄録全体を表示

PDF形式でダウンロード (2510K)
溶融金属積層により造形した
合金工具鋼
の切削における工具摩耗

*高木悠貴, 笹原弘之

精密工学会学術講演会講演論文集
2016年 2016A 巻 K64
発行日: 2016/08/20
公開日: 2017/02/20

DOI https://doi.org/10.11522/pscjspe.2016A.0_589

会議録・要旨集フリー

抄録を表示する抄録を非表示にする

溶融金属積層法はadditive manufacturingの一種で，溶接ワイヤをアーク放電を用いて溶融・固化させることで積層を行う．先行研究で，本手法を用いて同等な材料を付加することで，金属部材や金型の補修に適用させ，造形物の硬さ分布や靱性を調査した．本手法では，造形精度が低いため，造形後に仕上げ加工が必要となる．そこで，本研究では，溶融金属積層により造形した
合金工具鋼
を切削後，工具の工具摩耗を観察した．
抄録全体を表示

PDF形式でダウンロード (589K)
工具鋼へのニッケル合金のレーザ肉盛

*片岡義博, 芦中辰也, 宮崎俊行

精密工学会学術講演会講演論文集
2005年 2005A 巻 E77
発行日: 2005/09/15
公開日: 2006/04/18

DOI https://doi.org/10.11522/pscjspe.2005A.0.415.0

会議録・要旨集フリー

抄録を表示する抄録を非表示にする

　炭酸ガスレーザを用いて,粉体プレプレース法による
合金工具鋼
へのニッケル合金の肉盛を行った.レーザ出力,肉盛層数を変化して,肉盛層の硬さや組織を調べた.レーザ出力2200˜3100W,肉盛速度400mm/min,焦点はずし距離30mm,ビーム振幅7mm,保護ガスにアルゴンガスを用いた時,240˜260HV0.1の肉盛層硬さが得られた.肉盛層の組織は,急冷凝固のためにデンドライト2次ア–ム間隔が5μmの微細な組織に変化した.
合金工具鋼
表面の肉盛層付近には,熱影響部が生成し,マルテンサイト組織が観察された.
抄録全体を表示

PDF形式でダウンロード (942K)
合金工具鋼
(SKD11) の焼入加熱時間と機械的性質の関係

杉山道生, 山本長邦, 鮒谷清司, 古沢浩一

鉄と鋼
1974年 60 巻 1 号 85-95
発行日: 1974/01/01
公開日: 2010/10/12

DOI https://doi.org/10.2355/tetsutohagane1955.60.1_85

ジャーナルフリー

抄録を表示する抄録を非表示にする

In the earlier paper, the relationship between the austenitizing time and the mechanical properties ofhigh-speed tool steels was reported. In this paper, a similar relationship for the alloy tool steel SKD11 whichis austenitized at 960°C-1080°C for 10-3000sec and tempered at 150°C-550°C has been studied by thesame methods as in the previous paper. The results obtained are as follows;
1. The preferable mechanical properties of the steel SKD11 for cold working are generally obtainedin the hardness range of Rockwell C58 to 60 (Hv 650 to 700) and in the bend strength of over 350kg. Theseproperties can be obtained by the next heat-treatments. A: Austenitized for a long time at lower temperaturenear 1000°C and tempered between 150°C and 200°C. B: Austenitized for a short time at highertemperature between 1040°C and 1080°C and tempered between the same temperatures as A. C: Austenitizedfor a long time at 1040°C to 1080°C and tempered above 500°C.
2. Degrees of austenitizing in the microstructure seems to become larger in the order of B→A→C. Specimensby the treatment A are almost completely austenitized and those by B include some residual ferritein austenite. Those by the treatment C are completely austenitized and have partial grain growth.
3. A specimen by A which has been austenitized for 3000sec at 960°C and tempered at 150°C has themost preferable mechanical properties for cold work tools. This has been confirmed by industrial tests.
抄録全体を表示

PDF形式でダウンロード (4014K)
複合表面改質を施した
合金工具鋼
のアルミニウム合金とのしゅう動による摩耗特性

河村新吾, 春山義夫, 横井信安, 木村好次, 塩澤和章

日本機械学会論文集 C編
1999年 65 巻 640 号 4846-4853
発行日: 1999/12/25
公開日: 2008/02/26

DOI https://doi.org/10.1299/kikaic.65.4846

ジャーナルフリー

抄録を表示する抄録を非表示にする

A duplex surface treatment of tool steel, which comprises of nitriding of a substrate and coating of a titanium nitride (TiN) layer, is studied as a potential tool material for plasticity processes of aluminum alloy without lubrication. Tribological properties are determined on a ring on-block arrangement, where the ring is made of aluminum alloy, A6063, and the block is made of the TiN duplex treated alloy tool steel, SKD61, and is compared with untreated, nitrided, and TiN ion-plated alloy tool steel. At higher loads and higher speeds, transfer of the aluminum alloy onto the tool steel occurs, which is little improved by the treatment. Wear of the tool steel takes place as the predominant mode of surface damage at lower loads and lower speeds, and is markedly reduced by the duplex treatment. Possible mechanisms of the improvement are discussed.
抄録全体を表示

PDF形式でダウンロード (1950K)
132 渦電流法による
合金工具鋼
の表面改質層の評価(材料力学I)

関根裕一, 祖山均

東北支部総会・講演会　講演論文集
2008年 2008.43 巻 132
発行日: 2008/03/15
公開日: 2017/06/19

DOI https://doi.org/10.1299/jsmeth.2008.43.65

会議録・要旨集フリー

PDF形式でダウンロード (313K)
微小歯車の負荷特性に関する研究

（特殊工具鋼の場合）

*田嶋洋人, 高橋美喜男, 板垣貴喜, 前田憲次, 高橋秀雄

年次大会
2017年 2017 巻 S1120102
発行日: 2017年
公開日: 2018/03/25

DOI https://doi.org/10.1299/jsmemecj.2017.S1120102

会議録・要旨集フリー

抄録を表示する抄録を非表示にする

In this study, as the first step is to evaluate the load-carrying capacity of the micro-gears, we proposed a method of endurance testing that maintains appropriate center distance of micro-gears. Then, we performed the acceleration endurance tests using the proposed method, and found the approximate operating condition when damage occurred. The number of load cycles of an endurance test of one operating condition is 10⁷. Approximately 7 mg of lubricating oil were applied at the start of the endurance test to create a “lubricating condition.” The results of this test show the failure modes of the micro-gears, and an example of load-capacity, was determined for micro-gear of module 0.1 mm. In addition, comparing the load-carrying capacities of two kind of micro gears with different modules, the presence or absence of the failure showed comparatively good correlation with the maximum Hertzian pressure as compared with the PV value. Furthermore, the efficacy of the proposed method was validated.

抄録全体を表示

PDF形式でダウンロード (905K)
合金工具鋼
への高速度鋼のレーザ肉盛特性

片岡義博, 芦中辰也, 宮﨑俊行, 梅田高照

鋳造工学全国講演大会講演概要集
2006年 148 巻 58
発行日: 2006年
公開日: 2017/08/15

DOI https://doi.org/10.11279/jfeskouen.148_60

会議録・要旨集フリー

PDF形式でダウンロード (615K)

J-STAGEへの登録はこちら（無料）