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!

Program of the Week: Construction Trades

Construction Trades: Rough Carpentry Framer

Most say that a dog is a man's best friend. When he's feeling upset, his dog always finds a way to accompany him. When he's in need of someone to talk to, his dog is always there to listen. When he succeeds, his dog is there to celebrate. So, what better way to return the favor by providing him with security and warmth with a fabulous doghouse? 

Students from the Construction Trades (YouthBuild) program at Maricopa Skill Center demonstrate proper instructions on how to build a doghouse. 

Instructor, Marc Woehl (left), assists students in using a jig saw. 

Materials and Tools:

Goggles
Palette
Plywood
2x4 Boards
Roofing Shingles
Nails
Paint
Paint Brushes
Skill Saw
Jig Saw
Sallzall
Miter Box
Nail Gun

Building the Foundation
A 28x32 palette is used to build the foundation of the doghouse. Plywood is nailed to the top of the palette to cover the frame.

Constructing the Walls
To construct the walls, chalk lines are made on the foundation to lay out where each will be placed. The walls are then assembled using a nail gun. In addition, doors and windows are laid out and measured for proper cutting.

Student, Adam Clark, uses a miter saw for trimming.

Framing the Roof
The layout of the roof is determined by calculating the roof's slope and distance.
The wall is then marked at the top to indicate the placement of each rafter, which is measured at every two feet. After the measurements of the rafters are checked, they are assembled by nailing the structures together. The rafters are then sheathed with 1/2 inch plywood.

Installing Roof Shingles
The length and width of the roof are measured to determine how many shingles are needed. Once the first row of shingles are aligned at the bottom edge of the roof, they are installed by hammering the nails in. The process of this is repeated for the next following rows.

Student, Walter Elera, applies a coat of paint.

Preparing for Paint
The doghouse is then examined for imperfections by using a caulk gun to fill in the gaps to prevent water from leaking in. After this process is completed, primer is applied around the doghouse.

Painting the Doghouse
After one coat of paint was applied to the doghouse, it took about 24 hours for it to completely dry. 

Well, would you look at that? Although it takes a lot of time, effort, and skill to build a doghouse, the owners are definitely proud of their home sweet home.

Thank you to our instructor and students for doing such marvelous work. As a matter of fact, these houses were presented at the Home and Landscape Show last April.

Stay tuned for next week's program spotlight: Precision Machining!