Wallace Community College

JULY 13, 2011

AUT 256 CNC Milling Lab I

Plan of Instruction

Effective Date: Fall 2007 Version Number: 2011-1

COURSE DESCRIPTION: This course covers basic (3-axis) computer numeric control (CNC) milling machine setup and operating procedures. Upon completion, the student should be able to load a CNC program and setup and operate a 3-axis CNC milling machine to produce a specified part. Related safety, inspection, and process adjustment are also covered.

CREDIT HOURS

Theory 0 credit hour Lab 3 credit hours Total 3 credit hours

NOTE: Theory credit hours are a 1:1 contact to credit ratio. Colleges may schedule lab hours as 3:1 and/or 2:1 contact to credit ratio. Clinical hours are 3:1 contact to credit ratio. (Ref Board Policy 705.01)

PREREQUISITE COURSES Determined by college unless stated otherwise.

CO-REQUISITE COURSES Determined by college unless stated otherwise.

INDUSTRY COMPETENCIES

 Perform basic setup procedures used with a 3-axis CNC milling machine.  Machine a simple part using a 3-axis CNC milling machine.  Inspect parts and make appropriate machine process adjustments.

GENERAL INSTRUCTIONAL GOALS

 Cognitive: Comprehend principles and concepts related to operating a basic (3- axis) CNC milling machine

 Psychomotor: Apply principles of machining a part using a 3-axis CNC milling machine

 Affective: Value the importance of adhering to policy and procedures related to CNC machining.

STUDENT OBJECTIVES

Condition Statement: Unless otherwise indicated, evaluation of student’s attainment of objectives is based on knowledge gained from this course. Specifications may be in the form of, but not limited to, cognitive skills diagnostic instruments, manufacturer’s specifications, technical orders, regulations, national and state codes, certification agencies, locally developed lab/clinical assignments, or any combination of specifications.

MODULE A – BASIC CNC MILLING SETUP FOR OPERATION MODULE DESCRIPTION: The purpose of this module is to teach the students to perform basic setup procedures for a 3-axis CNC milling machine. Topics will include safety, start up and shut down, program loading, work holding and tool holding devices, tool offsets, and program verification. PROFESSIONAL COMPETENCIES PERFORMANCE OBJECTIVES KSA A1.0 Perform basic setup A1.1 Setup a 3-axis CNC milling 3 procedures used with a 3- machine in order to produce axis CNC milling machine. a simple part in accordance with specifications. LEARNING OBJECTIVES KSA A1.1.1 Describe appropriate safety precautions when using a CNC 3 milling machine. A1.1.2 Describe how to start up and shut down a CNC milling machine. 3 A1.1.3 Describe various considerations when loading a program into a 2 CNC milling machine controller. A1.1.4 Describe how to select the appropriate work holding devices, 2 including table fixturing devices, to perform a simple CNC milling operation. A1.1.5 Explain how to set part zero on a CNC milling machine. 2 A1.1.6 Explain how to select the appropriate tooling and tool holders to 2 perform a simple CNC milling operation. A1.1.7 Describe the process involved in loading tooling and tool holders 2 into a CNC milling machine. A1.1.8 Describe the process for setting tool offsets into a CNC milling 2 machine controller. A1.1.9 Explain the correct process for verifying a CNC milling program. 2

MODULE A – OUTLINE  Related safety  Machine power up/down  Program loading  Machine table fixturing  Part zero/fixture offsets  Tool holders  Tooling loading  Tool offsets  Work holding devices  Program verification

MODULE B – BASIC CNC MILLING OPERATIONS MODULE DESCRIPTION: The purpose of this module is to teach the students to machine a simple part using a 3-axis CNC milling machine, and to inspect those parts as well as make appropriate adjustments to the machine process. Topics include safety, drilling, reaming, tapping, facing, boring, circular milling, angular milling, pocket milling, and peripheral milling. Students will also learn about measurement instruments, part inspection, and process adjustment. PROFESSIONAL COMPETENCIES PERFORMANCE OBJECTIVES KSA B1.0 Machine a simple part using B1.1 Operate a 3-axis CNC 3 a 3-axis CNC milling milling machine to machine a machine. specified part using various applications. B2.0 Inspect parts and make B2.1 Select the required 3 appropriate machine process measuring instruments, adjustments. conduct specified inspections, and make appropriate machine process adjustments. LEARNING OBJECTIVES KSA B1.1.1 Describe appropriate safety precautions when using a CNC 3 milling machine. B1.1.2 Describe various considerations for drilling a part using a CNC 3 milling machine. B1.1.3 Describe various considerations for reaming a part using a CNC 3 milling machine. B1.1.4 Describe various considerations for tapping a part using a CNC 3 milling machine. B1.1.5 Describe various considerations for facing a part using a CNC 3 milling machine. B1.1.6 Describe various considerations for boring a part using a CNC 3 milling machine. B1.1.7 Describe the appropriate CNC milling procedure for circular 3 milling. B1.1.8 Describe the appropriate CNC milling procedure for angular 3 milling. B1.1.9 Describe the appropriate CNC milling procedure for pocket 3 milling. B1.1.10 Describe the appropriate CNC milling procedure for peripheral 3 milling.

B2.1.1 Describe the purpose of various measurement instruments. 3 B2.1.2 Identify and describe the appropriate use of various machining 3 measurement instruments. B2.1.3 Describe standard operating procedures for inspecting parts. 3 B2.1.4 Explain the importance of inspecting the tolerances and 3 specifications of machined parts. B2.1.5 Describe how to use findings from the inspection process to 3 adjust the machine accordingly.

 MODULE B – OUTLINE  Operations o Drilling o Reaming o Tapping o Facing o Boring o Circular milling o Angular milling o Pocket milling o Peripheral milling  Inspection o Part inspection o Process adjustment

Learning Objectives Table of specifications The table of specifications below identifies the percentage of objectives at a cognitive level for each module. Instructors should develop sufficient numbers of test items at the appropriate level of evaluation.

Moderate Advanced Superior Limited Knowledge Knowledge Knowledge Knowledge and and and and Proficiency Proficiency Proficiency Proficiency KSA 1 2 3 4 Module A 78% 22% Module B 100%

Learner’s Knowledge, Skills and Abilities Indicator Key Terms Description  Identifies basic facts and terms Limited about the subject or competency. Knowledge  Performs simple tasks associated 1 and with the competency. Needs to be told or shown how Proficiency to do most tasks.  Requires close supervision.  Identifies relationship of basic facts Moderate and states general principles and can determine step- Knowledge by-step procedures for doing the competency. 2 and  Performs most parts of the Proficiency competency. Needs help only on hardest parts.  Requires limited supervision.  Analyzes facts and principles and draws conclusions about the subject to include why and when the competency must be done and why Advanced each step is needed. Can predict outcomes. Knowledge 3  Performs all parts of the and competency. Needs only a spot check of completed Proficiency work.  Requires little or no direct supervision.  Can evaluate conditions and make Superior appropriate decisions as related to resolving Knowledge problems. 4 and  Performs competency quickly and Proficiency accurately with no direct supervision and is able to instruct and supervise others.