Status: Active Date Printed: 8/11/2004 SAN DIEGO COMMUNITY
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SAN DIEGO COMMUNITY COLLEGE DISTRICT CITY COLLEGE ASSOCIATE DEGREE COURSE OUTLINE SECTION I SUBJECT AREA AND COURSE NUMBER: Machine Technology 140 COURSE TITLE: Machine Technology UNITS: 4.00 Grade O nly CATALOG COURSE DESCRIPTION: This course is an introduction to the M achine Technology field. Emphasis is placed o n safety, measurements, common formulas, machining applications, drawings, and career opportunities in the field. This course is designed for students planning to major in the occupational field of machine technology. REQUISITES: Advisory: ENGL 051 and ENGL 056, each with a grade of "C" or better, or equivalent, or W5/R5. Advisory: Completion of or concurrent enrollment in MATH 095 with a grade of "C" or better, or equivalent, or M40. FIELD TR IP REQUIREMENTS: May be required TRANSFER APPLICABILITY: Associate Degree Credit & transfer to CSU and/or private colleges and universities. CAN DATA: None LECTURE HOURS PER WEEK: 3.00 LAB HOURS PER WEEK: 3.00 STUDENT LEARNING OUTCOMES: Upon successful completion of the course the student will be able to: 1. Describe the history of machines and identify machine trade careers, professions and trade organizations. 2. Identify safety equipment and explain safe work practices in the machine shop. 3. Illustrate an understanding of the lines and symbols on engineering drawings and plan the sequence of operations for machining round work and flat workpieces. 4. Use a variety of measuring instruments such as squares, surface plates, vernier calipers, micrometers, gages, comparators, to measure given workpieces. 5. Prepare a work surface for layout, use the combination square and surface gage to layout straight lines, and make precision layo uts using the sine bar and gage blocks. 6. Select appropriate tools for holding, assembling and dismantling workpieces and for sawing a variety of materials, and identify and exp lain the purpose of several types of hand reamers and bearings. 7. Identify the applications of various types of cutting-tool materials, set up a tool and machine for cutting with various tools, and apply cutting fluids efficiently for a variety of machining operations. 8. Use a bandsaw to cut off work to an accurate length, explain the purpose the main operative parts of a contour-cutting bandsaw, and set up a contour b andsaw to file a layout. Status: Active Date Printed: 8/11/2004 9. Distinguish among the four types of drilling presses based on each one's purpose, use a drill grinder to grind proper angles and clearances on a twist drill and use a drill press to make accurately-sized holes in workpieces. Calculate the reaming allowance required for given reamers. 10. Explain purposes of the main operative parts of the lathe, list the necessary safety precautions required to run a lathe, and set up the following: a workpiece for machining between centers, a cutting tool for turning operations, a lathe to cut a variety of threads and a lathe chuck to hold a workpiece to b e cut. 11. Recognize and explain the purposes of standard milling machines and milling cutters, calculate the proper feeds for various cutters and materials, set up a milling machine for face, side, straddle and gang milling, and calculate the indexing necessary with a wide-range divider. 12. Identify the purposes of the main operative parts of a jig borer, calculate hole locations, and select the wheels and grinding methods required for jig-grinding holes. 13. Select the proper grinding wheel for given work materials and jobs and set up various workpieces for surface, cylindrical and internal grinding. 14. Describe the chemical composition of steel, choose the proper grade of tool steel for a given workpiece, and test a given piece of steel for hardness. 15. Use mathematical formulas commonly found in machining technology to calculate speeds and feeds on mills and lathes, and calculate the layout and positioning of angles and angular hole patterns. SECTIO N II 1. COURSE OUTLINE AND SCOPE A. OUTLINE OF TOPICS: The following topics are included in the framework of the course but are not intended as limits on content. The order o f presentation and relative emphasis will vary with each instructor. 1. Introduction to machine tools and trades a. The history of machines i. Common machine tools ii. Standard machine tools iii. Computer numerical control machines iv. Major developments in metalworking b. Machine trade opportunities i. Careers in the metalworking industry ii. Apprenticeship training iii. Professions iv. Trade organizations 2. Safety in the machine shop a. Safety equipment b. Safe work practices c. Proper clothing and hygiene d. Proper laboratory cleaning e. Chemicals and fire hazards 3. Mathematical Computations with Calculator a. Using mathematics in machining b. Scientific pocket calculator c. Calculating Fractions and Decimals with scientific Calculator 4. Converting Metric and US Standard Units of Measure a. Metric system b. Converting U.S. system units to metric system units c. Converting metric system units to U.S. system units 5. Performing RPM Calculations a. Prop erly calc ulating R PM 's Status: Active Date Printed: 8/11/2004 b. Changing variables in machining formulas c. Effects of different alloys and cutting tools on RPM's d. Correct use of formulas to achieve proper RPM 6. Feed Calculations a. Proper feed calculations b. Variables in feed equations c. Negative effects of improper RPM , feed, and depth of cut on tool life, production and profitability d. Benefits of increased production related to increased profit for proper feed calculations e. Differences between inch per revolution (IPR) and inch per minute (IPM) f. Proper application of IPR and IPM g. Chip load per tooth for roughing verses finishing of different materials 7. Pythagorean Theorem Calculations a. Limitations of Pythagorean Theorem b. Equations for the Pythagorean Theorem c. Pythagorean equations in machining processes 8. Trigonometry used in machining technology a. Combined methods to solve missing lengths b. Combined methods to solve missing angles c. Applications of sine function to machining sine bar 9. Trigonometric polar to rectangluar coordinate conversions a. Benefits of not being limited to 90 degree solutions b. Using scientific calculator to perform polar to rectangluar coordinate conversions c. Time benefits using polar coordinates to calculate locations d. Proper use of Polar trigonometry to calculate locations on a bolt hole circle e. Translation of a reference relative to a known point in a cartesian coordinate system 10. Job planning a. Engineering drawings i. Types of drawings and lines ii. Drafting terms and symbols iii. Surface symbols b. Machining procedures for various workpieces i. Machining procedures for round work ii. Workpieces held in a chuck iii. Machining flat workpieces 11. Measurement a. Basic measurement i. Inch system ii. Metric system iii. Fractional measurement iv. Metric steel rules v. Fractional steel rules vi. Outside calipers vii. Inside calipers b. Squares and surface plates i. Machinist's combination square ii. Precision squares iii. Beveled-edge squares iv. Toolmaker's surface plate square v. Cylindrical squares Status: Active Date Printed: 8/11/2004 vi. Adjustable squares vii. Adjustable micrometer square viii. Straightedges ix. Surface plates c. Micrometers i. Principle of the inch micrometer ii. Vernier micrometer iii. Metric micrometer iv. Metric vernier micrometer v. Combination inch-metric micrometer vi. Micrometer adjustments vii. Testing the accuracy of micrometers viii. Special-purpose micrometers ix. Screw thread micrometers d. Vernier calipers i. Parts of the vernier caliper ii. Measuring a workpiece iii. Reading the metric vernier caliper iv. Direct-reading dial caliper e. Inside-measuring instruments i. Inside micrometer calipers ii. Inside micrometers iii. Small hole gages iv. Telescope gages v. Dial bore gages f. Depth-measuring instruments i. Micrometer depth gage ii. Vernier depth gages g. Height-measuring instruments i. Vernier height gage ii. Measuring height with gage blocks iii. Precision height gage h. Gage blocks i. Gage block manufacture ii. Gage block sets i. Angular measurement i. The universal bevel protractor ii. The sine bar iii. The compound sine plate or table j. Gages i. Fixed gages ii. Cylindrical plug gages iii. Plain ring gages iv. Taper plug gages v. Taper ring gages vi. Thread plug gages vii. Thread ring gages viii. Snap gages k. Comparison measurement i. Comparators ii. Dial indicators iii. Mechanical and electronic comparators iv. Optical comparators v. Mechanical-optical comparators vi. Air gages or pneumatic comparators l. The coordinate measuring system Status: Active Date Printed: 8/11/2004 i. Parts of the measuring unit ii. Operation of the measuring unit m. Measuring with light waves i. Measuring with optical flats ii. Measurement with alsers iii. The lasermike n. Surface finish measurement 12. Layout tools and procedures a. Basic layout materials, tools and accessories i. Layout solutions ii. Layout tables and surface plates iii. Scribers iv. Dividers and trammels v. Hermaphrodite calipers vi. Squares vii. The combination set viii. Surface gage ix. Layout or prick punches and center punches b. Basic or semiprecision layout i. How to lay out hole locations, slots and rad ii ii. How to lay out a casting having a cored hole iii. How to lay out a keyseat in shaft c. Precision layout i. The vernier height gage ii. How to make a precision layout using a sine bare, gage blocks and a vernier height gage 13. Hand tools and bench work a. Holding, striking and assembling tools i. The bench vise ii. Hammers iii. Screwdrivers iv. Wrenches v. Pliers b. Hand-type cutting tools i. Sawing, filing and scraping ii. The hand hacksaw iii. Files iv. Scapers c. Thread-cutting tools and procedures i. Hand taps ii. Threading dies d. Finishing processes - reaming, broaching and lapping i. Hand reamers ii. Broaching iii. Lapping 14. Metal-cutting technology a. Physics of metal cutting i. Metal-cutting technology ii.