Program of the Week: Precision Machining

Precision Machining: CNC Machinist 

Imagine having a big piece of metal that can be transformed into an intricate shape, perhaps a tool, or maybe a piece that will connect to form an operating motor. This can all be done with precision machining, which is where machinists work in teams to convert raw materials into durable goods by using computer numerical control (CNC) machines and various tools.

The tools and parts necessary for Precision Machining at Maricopa Skill Center.

The Precision Machining program offered at Maricopa Skill Center provides its classes at GateWay Community College. Students from the Precision Machining program demonstrate the functions of various CNC machines.

CNC Machines

The CNC Lathe and CNC Mill machines can be operated both manually and by the help of a computer. When a student is operating a machine with the help of a computer, a Secure Digital (SD) card is used to encode and process the information to function. 

Student, Jeff Stewart, carefully controls the crank handle for the vertical milling machine.

• CNC Lathe - The cutting tool remains stationary while the metal piece is being turned. This creates round parts running per programmer's code.
• CNC Mill - Compared to the lathe, the cutting tool is moving while the metal piece remains stationary. This creates square parts running per programmer's code.

Student, Andrei Dejanovich, organizes his drills before starting on a project.

Vertical Milling Machine
The functions of this machine are similar to the CNC Mill except that it is controlled and operated manually. While operating this machine, it is crucial to carefully steer the table feed handwheel while the shape is being processed. 

Surface Grinder
A surface grinder is manually operated and is the finishing process that creates a smooth precise finish on flat surfaces. This gives the metal piece a more refined appearance.

The surface grinder (left) and the precise finish of a metal piece (right).

As you can see, CNC machinists possess skills and knowledge of being able to control and program CNC machines. Since these skills are in great demand, CNC machinists become more educated especially with today's advanced technology.

Projects created by CNC students at Maricopa Skill Center.

Stay tuned for the next program highlight: Welding!