-
公开(公告)号：US4984445A
公开(公告)日：1991-01-15
申请号：US508688
申请日：1990-04-13
IPC分类号： B21J13/02
CPC分类号： B21J13/02
摘要： A ceramic isothermal forging die comprises a pair of disk-shaped die halves that are formed of ceramic and have die cavities cut in their mating surfaces and a pair of die half holders each having a recess for accommodating one of the die halves. Each die half is divided into a plurality of radial segments whose bottom surfaces are tapered away from their mating surface with increasing proximity to the center of the die. The floor of each die half holder is tapered to become deeper toward the center of the die and to be complementary to the tapered bottom surfaces of the die segments. The ceramic material of the die makes it usable in the atmosphere. Because of the segmentation of the die halves and the tapering of the segment bottoms and the floor of the die holder recesses, a large force which would otherwise be produced in the circumferential direction of the die by thermal stress during heating and cooling is suppressed. Further, a force urging the segments toward the center of the die is produced during forging. As a result, that die is protected from breakage and from disintegration by separation of the segments.
摘要翻译： 一种陶瓷等温锻造模具包括一对由陶瓷形成并具有在其配合表面上切割的模腔的盘形半模，以及一对半模夹持器，每个半模具具有用于容纳其中一个半模的凹部。 每个半模被分成多个径向段，其下表面与其配合表面逐渐变细，越靠近模具的中心。 每个模具半支架的底部是锥形的，以朝向模具的中心变深，并且与模具段的锥形底面互补。 模具的陶瓷材料使其可在大气中使用。 由于半模的分割以及分段底部和模座保持器凹部的底部的锥形化，抑制了在加热和冷却期间通过热应力在模具的圆周方向上产生的较大的力。 此外，在锻造期间产生朝向模具的中心推动片段的力。 结果，该模具被保护而不被破坏，并且通过分隔部分而不被分解。
-
公开(公告)号：US4600446A
公开(公告)日：1986-07-15
申请号：US657248
申请日：1984-10-03
摘要： A high strength low ductile alloy is formed in a desired shape with high accuracy by bundling a multiplicity of fine wires made of the high strength low ductile alloy, consolidating the bundle of fine wires into a prescribed shape thereby giving rise to a formed product wherein the interiors of the fine wires comprises aggregates of very fine grains resulting from primary recrystallization and subjecting the formed product to thermal treatment for grain growth at the temperature of secondary recrystallization whereby the very fine grains undergo grain growth.
摘要翻译： 高强度低延展性合金通过捆扎由高强度低韧性合金制成的多根细线而以高精度形成所需形状，将细丝束固结成规定形状，从而形成成形品，其中， 细线的内部包括由一次再结晶产生的非常细晶粒的聚集体，并且在二次再结晶的温度下对成形体进行晶粒生长的热处理，由此极细的晶粒经历晶粒生长。
-
公开(公告)号：US4838329A
公开(公告)日：1989-06-13
申请号：US74032
申请日：1987-07-16
申请人： Kiyoyuki Ohuchi , Ken'ichi Shimizu
发明人： Kiyoyuki Ohuchi , Ken'ichi Shimizu
IPC分类号： B60C11/16
CPC分类号： B60C11/16
摘要： A nonskid device for a tire, shoe sole or the like. The device comprises a stud that is embedded in a hole formed inwardly from the tread of the tire or shoe sole. The stud is a generally spherical or cylindrical body having an annular stud tip formed integrally therewith at one end thereof and is retained in the hole, either directly or via a cup, by an annular projection protruding inward from the wall of the hole. In normal slip-free travel, the stud tip does not project above the tread, and only the apex of the spherical or cylindrical body thereof is exposed at the plane of the tread. When the tread slips relative to the road surface, a force acts on the apex to cause the stud to rotate by a small angle. This causes the stud tip to rise beyond the plane of the tread and bite into the road surface. The stud tip thus comes into contact with the road surface only when required to prevent slipping, which, in the case of the device being applied to a vehicle tire, minimizes damage to the road and prevents pollution from road dust during normal driving.
摘要翻译： 一种用于轮胎，鞋底等的不配套装置。 该装置包括嵌入在从轮胎或鞋底的胎面向内形成的孔中的螺栓。 螺柱是通常为球形或圆柱形的主体，其具有在其一端与其一体形成的环形螺柱螺柱，并且通过从孔的壁向内突出的环形突起直接或经由杯保持在孔中。 在正常的无滑动行驶中，螺柱尖端不在胎面上方突出，并且其球形或圆柱体的顶点仅在胎面的平面处露出。 当胎面相对于路面滑动时，力作用在顶点上以使螺柱旋转小角度。 这使得螺柱尖端升高超过胎面的平面并咬入路面。 因此，螺栓头部仅在需要防止滑动的情况下与路面接触，在将该装置应用于车辆轮胎的情况下，使路面的损坏最小化，并且能够防止正常驾驶期间的道路灰尘污染。
-
-
搜索结果
3 条记录 (耗时 0.02 秒)
