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Therefore, the length and diameter of the complete tools must be entered when connecting them to the machine. These settings of the tools can be measured with an external pre-setter. Convenient pre-setters assume the nominal values, tolerances and designation from tool management and pass the measured values directly to the CNC machine.
Computer numerical controlled (CNC) machines are computer-driven tools that can machine a large variety of shapes, and whose use in the workflow depends on the part to be machined. [2] CNC machines are becoming the standard due to their speed, precision, flexibility, repeatability, and reduced downtime while changing jobs.
The part program is a sequence of instruction that describe the work that is to be done to a part. Typically these instructions are generated in Computer-aided manufacturing software and are then fed into the computer numerical control (CNC) software on the machines, such as drills, lathes, mills, grinders, routers, that are performing work on the part.
Computer-aided process planning initially evolved as a means to electronically store a process plan once it was created, retrieve it, modify it for a new part and print the plan. Other capabilities were table-driven cost and standard estimating systems, for sales representatives to create customer quotations and estimate delivery time.
The objective is to design for lower cost. The cost is driven by time, so the design must minimize the time required to not just machine (remove the material), but also the set-up time of the CNC machine, NC programming, fixturing and many other activities that are dependent on the complexity and size of the part.
[13] [14] As CAM software and machines become more complicated, the skills required of a machinist or machine operator advance to approach that of a computer programmer and engineer rather than eliminating the CNC machinist from the workforce. Typical areas of concern. High-Speed Machining, including streamlining of tool paths; Multi-function ...
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