公开(公告)号：US5139099A

公开(公告)日：1992-08-18

申请号：US736725

申请日：1991-07-26

申请人： Takeshi Hayashi ,  Shigeru Sato ,  Katsuaki Tsujimoto ,  Daishiro Miyazaki ,  Yoneo Hiwasa ,  Toshiki Ishimatsu ,  Kimiyo Wada

发明人： Takeshi Hayashi ,  Shigeru Sato ,  Katsuaki Tsujimoto ,  Daishiro Miyazaki ,  Yoneo Hiwasa ,  Toshiki Ishimatsu ,  Kimiyo Wada

IPC分类号： E21B10/32 ,  E21B10/38 ,  E21B10/62

CPC分类号： E21B10/38 ,  E21B10/327 ,  E21B10/62

摘要： An excavation tool, in which a device is provided which receives the striking force of a hammer and the rotational force of a hammer cylinder, in a bottom surface of which at least three axle holes are provided displaced from a center of the device and at equivalent angular intervals in the circumferential direction, block axles are inserted in the axle holes in a freely rotatable manner, blocks which are roughly fan-shaped and have bits embedded in the lead end surfaces thereof are provided at lead end parts of the block axles, so that left- and right-side faces of said blocks are in mutual opposition and arc parts of all blocks together form roughly a circle shape; and when said device is rotated in the direction of excavation, said blocks rotate as a result of the resistance to excavation of the bottom part of the excavation hole, one intersection part of the side faces and the arc part of each block protrudes beyond the outer circumferential surface of the device by a predetermined excavation amount, and the mutual positions of the block axles with respect to the blocks are so determined that both side faces of each block come into contact with the side faces of neighboring blocks at this time.

公开(公告)号：US5113954A

公开(公告)日：1992-05-19

申请号：US660546

申请日：1991-02-25

申请人： Takeshi Hayashi ,  Shigeru Sato ,  Katsuaki Tsujimoto ,  Daishiro Miyazaki ,  Yoneo Hiwasa ,  Toshiki Ishimatsu

发明人： Takeshi Hayashi ,  Shigeru Sato ,  Katsuaki Tsujimoto ,  Daishiro Miyazaki ,  Yoneo Hiwasa ,  Toshiki Ishimatsu

IPC分类号： E21B10/32 ,  E21B10/56 ,  E21B10/66

CPC分类号： E21B10/66 ,  E21B10/327 ,  E21B10/56

摘要： An excavation tool, having a pair of insertion holes placed in the bottom surface of a device, which receives the impact force of a hammer and the rotational force of a hammer cylinder, at positions separated in a radial direction from the center of the device and symmetrical around this center as a center of rotation, also having block axles, one end of each of which is freely rotatably inserted into one of the insertion holes, and having blocks, which have a roughly semicircular shape with a diameter roughly equal to that of the device, into the lead end surfaces of which are set bits, and which have straight edge surfaces which are flat surfaces vertical with respect to the lead end surfaces, provided at the other end of the block axles and with the straight edge surfaces in mutual opposition; in an extended diameter state of the blocks, the blocks are moved in opposite directions along a radius of the device by rotating the blocks around the block axles, and the distance between the centers of the insertion holes provided in the bottom surface of the device and the center of this device is set at from 0.2 times the diameter of the bottom surface of the device to 0.3 times thereof.

公开(公告)号：US4619698A

公开(公告)日：1986-10-28

申请号：US563666

申请日：1983-12-20

申请人： Fumihiro Ueda ,  Kaoru Kawada ,  Kazuo Yamamoto ,  Noriaki Miwa ,  Toshiki Ishimatsu

发明人： Fumihiro Ueda ,  Kaoru Kawada ,  Kazuo Yamamoto ,  Noriaki Miwa ,  Toshiki Ishimatsu

IPC分类号： B22F7/00 ,  B01J3/06 ,  C22C1/05 ,  C22C26/00 ,  C22C29/16 ,  B22F3/14

CPC分类号： C22C26/00 ,  B01J3/062 ,  B01J2203/0645 ,  B01J2203/066 ,  B01J2203/0685

摘要： A cubic boron nitride-based very high pressure-sintered material very excellent in both toughness and wear resistance and adapted to be employed in cutting tools for milling hard steels and like machining purposes. The very high pressure-sintered material consists essentially of: 1-20 percent at least one compound selected from the group consisting of titanium carbide and titanium carbo-nitride; 1-20 percent at least one compound selected from the group consisting of CoAl, NiAl, and (Co, Ni)Al; and 75-97 percent cubic boron nitride and inevitable impurities. The very high pressure-sintered material may further contain 1-10 percent at least one metal selected from the group consisting of cobalt and nickel.

摘要翻译： 立方氮化硼基非常高压烧结材料的韧性和耐磨性非常优异，适用于铣削硬质钢的切削刀具和类似的加工目的。 非常高的压力烧结材料主要由以下组成：1-20％的至少一种选自碳化钛和碳氮化钛的化合物; 1-20％的至少一种选自CoAl，NiAl和（Co，Ni）Al的化合物; 和75-97％的立方氮化硼和不可避免的杂质。 非常高的压力烧结材料可以进一步含有1-10％的至少一种选自钴和镍的金属。