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This paper proposes a new method to control lapping speed of the lapping machine properly, which may reduce lapping stroke and improve lapping accuracy and quality. In the beginning of lapping, the rotating acceleration of the lapping tool is controlled. It makes the acceleration increase from zero slowly. When lapping speed reaches a certain figure, inflection point of acceleration appears. Then...
According to high speed lapping technology with solid abrasives this paper develops a new high speed lapping machine. The high speed lapping technology and the machine are combined into one system through this lapping machine. By means of this way the high speed lapping technology is used in production widely and a very good result has been got. Comparing traditional lapping, by new machine the machining...
The computer control technique is used to control lapping pressure on-line in this paper. In the starting period of lapping, contacting state between the workpiece surface and lapping tool surface is not ideal case. In order to reduce the impact between the workpiece and lapping tool, in starting lapping, the lapping pressure is lower, and then increases gradually until a certain higher pressure reached...
Establishing high performance cooperation in the peer-to-peer (P2P) network architecture is a fundamental and challenging research area currently, due to peer anonymity, peer independence, high dynamics of peer behaviors and network conditions, and the absence of an effective security mechanism. Most assessment methods based on trust or reputation have some remarkable innate drawbacks, for some presumed...
This paper presents the developments of different connection methods including bolting, riveting, rivet welding and the whole concentrating point welding process and the progress of the design and welding technology of some typical bridges.Significantly it introduces the basic properties of design and development tendency of bridges, such as China Wuhan Changjiang River Great Bridge (Bolt connection),...
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