Manufacturing Engineering Computer Numerical Control (CNC) Machines Copyright © Texas Education Agency, All rights reserved. 1

Bell Work Activity Directions: Please take out a sheet of paper and answer the following questions. A.Describe how you would make 100 paper stars if you were given 100 sheets of paper and one pair of scissors. B.If you were hired to carve five pumpkins with the identical face pattern for Halloween, do you think you could do it successfully? Why or why not? 2 Copyright © Texas Education Agency, All rights reserved.

A.There are several important terms and definitions students need to know. B. Students will now complete the matching definitions handout on CNC Machines. Students may work in groups. Warm-up Activity Computer Numerical Control (CNC) Machines Terms 3 Copyright © Texas Education Agency, All rights reserved.

History of Metalworking Since ancient times mankind has valued the use of metal. As we evolved from the stone age, our ancestors found that metals like copper, bronze, and iron were more durable than stones and wood. Through our interaction with other cultures, the knowledge of steelmaking was spread abroad, forever changing the art of tool making, weapons and warfare. 4 Copyright © Texas Education Agency, All rights reserved.

History of Metalworking For centuries tools and weapons were custom made individually, by hand, by skilled craftsmen. However, during the industrial revolution inventors found ways to create metal tools and weapons in factories, through mass production. Now, in the 21 st century, metalworking has evolved into a precise computer controlled process, limited only by our imaginations. 5 Copyright © Texas Education Agency, All rights reserved.

Computer Numerical Control (CNC) Machines CNC machines combine the functions of several metalworking tools to give the operator the ability to literally carve and shape items like metal, wood or plastic. The machines are controlled by programmable computer software and manufacturers can create products at a level of precision that was not possible with hand tools. 6 Copyright © Texas Education Agency, All rights reserved.

Computer Numerical Control (CNC) Machine Copyright © Texas Education Agency, All rights reserved. 7 Control panel PC / software CNC controller CNC spindle CNC cutting bed product being created

Top / Side View of CNC Cutting Bed 8 Copyright © Texas Education Agency, All rights reserved. X axis: front > back Y axis: right > left Z axis: (Side View) up > down