公开(公告)号：US06908688B1

公开(公告)日：2005-06-21

申请号：US09632400

申请日：2000-08-04

申请人： Shivanand Majagi ,  Robert W. Britzke ,  Daniel W. Nelson

发明人： Shivanand Majagi ,  Robert W. Britzke ,  Daniel W. Nelson

IPC分类号： B22F7/00 ,  B22F7/06 ,  B32B3/10

CPC分类号： E21B10/567 ,  B22F7/062 ,  B22F2005/001 ,  B22F2998/00 ,  Y10T428/12056 ,  Y10T428/12146 ,  B22F2207/01

摘要： A multiple-region hardmetal tool piece. The tool piece includes a hardmetal body including a hard particle component and a binder; an additional body, the additional body including a hardmetal body having a hard particle component and a binder; a metal body or a ceramic body; a substantially discontinuous gradient-free boundary layer between the hardmetal body and the additional body; and a mating surface between the hardmetal body and the additional body. In the preferred embodiment, the hard particle components are a carbide, such as tungsten carbide. In the preferred embodiment, the mating surface includes a male portion on one of the bodies and a corresponding female portion on the other of the bodies. The mating surface is symmetrical or asymmetrical and, in the preferred embodiment, the mating surface is axially symmetrical, such as a dimple. The mating surface may further including both micro and macro mating features.

摘要翻译： 多区域硬质合金工具。 工具件包括硬质合金体，其包括硬质颗粒组分和粘合剂; 附加体，所述附加体包括具有硬质颗粒组分和粘合剂的硬质合金体; 金属体或陶瓷体; 硬质合金体和附加体之间的基本上不连续的无梯度边界层; 以及硬质合金体和附加体之间的配合表面。 在优选实施例中，硬质颗粒组分是碳化物，例如碳化钨。 在优选实施例中，配合表面包括一个主体上的凸形部分和另一个主体上的对应的凹形部分。 配合表面是对称的或不对称的，并且在优选实施例中，配合表面是轴向对称的，例如凹坑。 配合表面还可以包括微型和宏观配合特征。

公开(公告)号：US4883129A

公开(公告)日：1989-11-28

申请号：US285565

申请日：1988-12-16

申请人： Alan H. Lonn ,  Daniel W. Nelson

发明人： Alan H. Lonn ,  Daniel W. Nelson

IPC分类号： E02F9/28 ,  E21B10/46 ,  E21C35/183 ,  E21C35/193

CPC分类号： E21C35/183 ,  E02F9/285 ,  E21C35/1933

摘要： Ground engaging bits used in abrasive road grading applications utilizing carbide inserts brazed to the leading face of the steel tip are beneficial on motor grader blades. Commercial road grading bit assemblies used consistent thickness, rectangular carbide inserts brazed to the leading edge of the steel tip. Due to wear and high residual stresses imparted upon the insert from the brazing operation, premature cracking and breaking of the carbide inserts occur. The subject bit arrangement utilizes a carbide insert with a flat rectangular cutting face of non-constant thickness brazed to a leading edge of a steel body. The carbide insert has a thickness that increases from the top of the carbide insert and reaches a maximum at the bottom of the steel body, where bit wear is the greatest. The increasing thickness of the carbide tip extends bit life over the current rectangular design and allows for a more efficient and economical use of the carbide. This design also reduces the residual stresses in the carbide insert which normally occur during the brazing operation, thus substantially reducing cracking and breaking, and further extending bit life.

摘要翻译： 使用硬质合金刀片钎焊到钢头前端的磨料路面分级应用中使用的接地钻头有利于平地机叶片。 商业道路分级钻头组件使用一致的厚度，矩形硬质合金刀片钎焊到钢头的前缘。 由于钎焊操作对刀片施加的磨损和高的残余应力，会发生碳化物刀片的过早开裂和断裂。 主体布置使用具有钎焊到钢体前缘的非恒定厚度的平坦矩形切割面的硬质合金刀片。 硬质合金刀片具有从硬质合金刀片的顶部增加的厚度，并且在钢体的底部达到最大值，其中钻头磨损最大。 硬质合金刀头的厚度的增加延长了当前矩形设计的钻头寿命，并且允许更有效和经济地使用碳化物。 该设计还减少了在钎焊操作期间通常发生的硬质合金刀片中的残余应力，从而大大减少了开裂和断裂，进一步延长了钻头寿命。

公开(公告)号：US06712361B2

公开(公告)日：2004-03-30

申请号：US10192251

申请日：2002-07-09

申请人： Daniel W. Nelson

发明人： Daniel W. Nelson

IPC分类号： A63B7100

CPC分类号： A63F13/803 ,  A63F7/0005 ,  A63F7/40 ,  A63F13/10 ,  A63F2011/0039 ,  A63F2300/8017

摘要： A mentally challenging game with computer and physical embodiments in which the goal is to move a primary object from its initial location through a system of platforms and levers to a particular destination. Horizontally movable counterweights also traverse this system, serving to raise and lower lever platforms in such a way as to raise and lower the primary object to its destination.

摘要翻译： 具有计算机和物理实体的精神挑战性游戏，其目标是将主要对象从其初始位置移动到平台和杠杆系统到特定目的地。 水平移动的配重还穿过这个系统，用于升高和降低杠杆平台，以便将主要物体升高和降低到目的地。