巻号一覧
後続誌
32 巻, 381 号
選択された号の論文の8件中1～8を表示しています
- |<
- <
- 1
- >
- >|
-
高須 芳雄1966 年 32 巻 381 号 p. 671-677
発行日: 1966年
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1226K) -
田村 清, 高橋 隆昭1966 年 32 巻 381 号 p. 678-682
発行日: 1966年
公開日: 2009/06/30
ジャーナル フリーThe shear strain of severely strained metal can be estimated from the ratio of the thickness (or length) of the lamellated crystal to the original grain diameter. The effective strains of builtup edges produced in the cuttings of steel and brass were measured by this method and found to be between 4 and 17.
By using the well established linear relation between the Vickers hardness and the flow stress for severely strained metals, the flow stresses of built-up edge and chip can be estimated from the micro-Vickers hardness test of them.
From these two kinds of test, the stress-strain curves were obtained up to very large value of strain. These curves coincided with the stress-strain curves obtained from the conventional teusile and conventional compression tests and their extension.抄録全体を表示PDF形式でダウンロード (1045K) -
工具摩耗に及ぼす被削材および工具の熱的性質の影響田中 義信, 津和 秀夫, 北野 昌則1966 年 32 巻 381 号 p. 683-689
発行日: 1966年
公開日: 2009/06/30
ジャーナル フリーPrevious works on ultra high speed cutting have disclosed that the chip-tool interface temperature plays a very significant role in the wear of cutting tool, and there are the intimate relationships between the interface temperature and the thermal properties of work and tool materials. In this research, in order to find the nature of the tool wear in ultra high speed cutting, several work and tool materials with different thermal conductivity respectively were employed. The results are as follows :
(1) The wear of high speed steel tool increases with an increase of cutting speed, and the critical speed such as “valley of death” reported by Salomon is not observed.
(2) In cutting by sintered carbide tool with a high thermal conductivity, as a general trend the tool wear is very small, and the influence of thermal conductivity of work materials on the tool wear is relatively small.
(3) In cutting of the high thermal conductivity materials such as brass and aluminium, ceramic tool (α·Al2O3) has the least wear, on the contrary, for the low thermal couductivity materials such as resin, it wears severely compared with the sintered carbide tool.抄録全体を表示PDF形式でダウンロード (5940K) -
焼結金属と炭素鋼とのすべり摩耗試験結果上田 太郎, 田中 政夫, 田中 芳雄1966 年 32 巻 381 号 p. 690-695
発行日: 1966年
公開日: 2009/06/30
ジャーナル フリーFe系およびFe-C系含油焼結金属を回転片とし, S35C鋼を固定片にして両者間のすべり摩耗試験を行ない, その結果と, 前に報告した同一焼結金属同志のすべり摩耗試験結果とを比較検討した。その結果, 前報でも述べたように, 一般に鉄系焼結金属を耐摩耗性を必要とする機械部品に応用するときは, どのような場合も焼結金属としては焼結密度を小さくして, 含浸油量を多くするとともに焼入れ処理により硬度を高めて用いるのが良策であることが再び確認された。そして焼入れ硬化せずに焼結のまま用いる焼結金属においては, 焼結金属同志の組合わせとするよりも, 普通鋼との組合わせにする方がよく, また焼入れ硬化して用いる焼結金属の場合は反対に焼結金属同志の組合わせにする方がよい結果が得られることが判明した。抄録全体を表示PDF形式でダウンロード (1075K) -
会田 俊夫, 藤見 博重, 高下 二郎1966 年 32 巻 381 号 p. 696-702
発行日: 1966年
公開日: 2010/02/16
ジャーナル フリーSintered metal gears have good surface durability even under the self-lubricating condition. But they are not so strong as those made of solid metals having the same chemical composition and tooth geometry.
So the load-carrying capacity of sintered metal gears having a high pressure angle or high density were tested. Also, the fatigue characteristics of welded or soldered sintered metal materials were investigated.
Results obtained are summarised as follows :
(1) The load-carrying capacity can be significantly increased by adopting higher pressure angle system, higher density and carburizing heat treatment.
(2) Notch factor is far less than stress concentration factor and size effect exists.
(3) Sintered metal can be effectively welded.抄録全体を表示PDF形式でダウンロード (1355K) -
仕上面に及ぼす含有成分の影響田中 義信, 津和 秀夫, 大森 義市1966 年 32 巻 381 号 p. 703-711
発行日: 1966年
公開日: 2009/06/30
ジャーナル フリーOn cutting sintered iron parts, construction of the finished surface is made clear on the basis of investigating the deformation of workpiece at the tool cutting edge and of the powder grains of the surface layer. While, a study is also made on the effect of the additional compo sitions on the surface finish.
Surface roughness is generally improved by copper or carbon additions (up to about 4μ Hmax).
The finished surface is classed into four types by the microstructural observation of the surface layer : crack type and “grainsfalling-off” type in the case of comparatively low cutting speed (40m/min), flow type in middle cutting speed (200m/min) where grains are carried away and pores are covered with flow film, and good cutting type in high cutting speed (360m/min) where flow film is not formed.
On cutting sintered parts which are composed of ductile iron powders only, flow type surface is apt to be formed also in high cutting speed.抄録全体を表示PDF形式でダウンロード (5402K) -
1966 年 32 巻 381 号 p. 712
発行日: 1966年
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (188K) -
1966 年 32 巻 381 号 p. 713-731
発行日: 1966年
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (3515K)
- |<
- <
- 1
- >
- >|