基本信息:
- 专利标题: METHOD AND APPARATUS FOR DENSIFYING POWDER METAL PREFORMS
- 专利标题(英):Method and apparatus for densifying powder metal preforms
- 专利标题(中):用于浓缩粉末金属预浸料的方法和装置
- 申请号:PCT/US2000/004098 申请日:2000-02-17
- 公开(公告)号:WO00048760A1 公开(公告)日:2000-08-24
- 主分类号: B21H5/02
- IPC分类号: B21H5/02 ; B22F3/03 ; B22F3/16 ; B22F3/20 ; B22F5/08 ; B23P15/14 ; C21D7/02 ; C21D9/32 ; B21D22/00 ; B22F3/24
摘要:
A multi-stage forming tool (10) for densifying the outer perimeter of post-sintered powder metal preforms (36) includes a series of axially spaced die plates (12) having different size die openings (14) arranged from largest to smallest. An oversized powder metal preform (36) is forced by a punch (28) through the successive die openings (14) causing the outer perimeter material (38) to be displaced and densified. The space between successive dies allows for elastic recovery of the preform to maximize the compressive stress imparted to the preform at each die stage. A high density, high strength powder metal component results which is suitable as a replacement for wrought components in high strength applications such as transmission gears.
摘要(中):
用于致密化烧结后金属粉末预成型件(36)的外周的多级成形工具(10)包括一系列具有不同尺寸的模具开口(14)的轴向隔开的模板(12),该模具板从最大到最小排列。 通过冲头(28)迫使过大的粉末金属预成型件(36)穿过连续的模具开口(14),从而使外周边材料(38)移位和致密化。 连续模具之间的空间允许预成型件的弹性恢复,以使在每个模具阶段施加到预制件的压缩应力最大化。 导致高密度,高强度的粉末金属成分,适用于替代高强度应用如传动齿轮的锻造部件。
IPC结构图谱:
B | 作业;运输 |
--B21 | 基本上无切削的金属机械加工;金属冲压 |
----B21H | 用轧制方法制造特殊的金属物品,如螺钉、轮、环、桶、球 |
------B21H5/00 | 制造齿轮 |
--------B21H5/02 | .外形呈圆柱形 |