Mechanics of Cutting and Boring. Part 8:Dynamics and Energetics of Continuous Belt Machines,

摘要

The report deals with forces and power requirements for cutting machines of the belt type,as exemplified by large chain saws and ladder trenchers. The forces of single cutting tools are considered,and related to the overall forces on a cutter bar. Forces are related to power,and sources of loss are identified. Tractive thrust and normal reaction are analyzed and used to assess the traction,weight and balance factors for self-propelled machines. Specific energy consumption and performance index are treated,and concepts of power density and apparent belt pressure are introduced. Requirements for acceleration of cuttings are assessed,and the report concludes with a set of worked examples. (Author)