Choose the right tool
The machining of composites is very different from metal machining, and the machining of other composites varies greatly. There are also many more types of composites than metals. Therefore, machining composites requires reevaluation of machining methods, tools, machines, and fixtures. In fact, for each batch of materials to the factory, a corresponding new machining plan is required.
Unlike most metal machining, there is no cutting when the composite is machined, but the tool edge breaks the substrate resin during the machining, and at the same time, the fiber is worn or cut.
Compound machining usually uses fairly sharp tools to cut the material cleanly and minimize friction between the tool and the workpiece. It is necessary to reduce the wear of the tool edge because even a slight change in the shape of the tool edge will quickly lead to high temperature, damage the edge, and affect the quality of the workpiece.
Various composites with different characteristics require a suitable tool shape to make machining easy and reduce penetration friction. The machining plan should consider the machining efficiency and cost comprehensively. Hole and cutting quality and unit machining costs are closely related. Further tool wear caused by rework due to substandard quality and wasting machine time and labor is an essential factor in cost increase.
With the development of composite machining, each composite should have its best unique tool and the corresponding machining parameters.
Because the composite is exceptionally wear-resistant, the tool wears very fast, and the ordinary carbide tool life is concise. A diamond-coated tool is the best choice for composite machining. Using cost-effective coating tools is the key to the efficiency of composite machining.
The factors determining the geometry of the tool
The material and thickness of the composite, the structure of the laminate, the shape to be processed, and the machine and equipment used all affect the design of the tool geometry.