DML UF 2018 Summer Test Guide

Which of the following is not a common component of the engine lathe? A. Headstock B. cross slide C. tool post D. tailstock E. ram - E. Ram What rotates on a lathe? - The chuck and the workpiece/material What is Turning? - A metal cutting process used mainly for the generation of cylindrical surfaces parallel to the workpiece axis What are 3 common workholding methods on a lathe? - Holding in a chuck, Holding between centers, and Holding in a collet Where should the tool bit be positioned while operating on a lathe? - Directly on the spindle center line Three most important items you need to bring to lab every week - 1. Safety Sheets 2. Proper Shoes 3. Long Pants What rotates on a milling machine? - The cutting tool and the spindle Two common types of milling machines - Knee and column mills, Bed mills What is the most common workholding method on a mill? - Holding in a vise What is milling? - A metal cutting process used primarily for the generation of rectangular surfaces. Relay Control - Similar to digital, only on and off Proportional Control - Similar to analog, can vary in direction and magnitude List 5 benefits of using 80/20 T-slotted aluminum framing system - 1. Non-expensive tools 2. Strong 3. Easy adjustment 4. Relatively low density - low weight 5. Easy to modify 4 Personal items that are dangerous to wear while operating powered equipment. - 1. shorts or open toed shoes 2. Long hair not tied back 3. Jewelry on hands or wrists 4. Loose fitting clothing When is it acceptable to leave a machine running? - When touching off on a workpiece What is the maximum allowable material which can be removed in a single pass on a mill or lathe? - One hundred thousandths of an inch (0.100") (100 Tau) What 3 things to check before turning on the milling machine? - 1. Speed range before turning on 2. Tool clearance before turning on 3. Tool direction while turning on 5 rules when using milling machine - 1. Never bring anything within 6" of the cutting zone while spindle is running 2. Always remove parallels after clamping the workpiece in the vise 3. Always lock the quill in the uppermost position before changing tools. 4. Always adjust the spindle speed WHILE the spindle is running. 5. Always ramp gently into contact with the workpiece. 3 true statements about installing/removing tools on the milling machine - 1. Always perform tool changes above the plastic covers. 2. Always raise the spindle to the uppermost position using the quill handle. 3. Always secure the quill/spindle in the upper most position using the spring loaded lock. When should the lathe chuck be removed from the spindle? - After clamping in the workpiece Where should the tool bit always be positioned while operating a lathe? - Directly on the spindle centerline Should the speed range (HI/LOW) on the mills or lathes be set BEFORE or AFTER the machine is turned on? - BEFORE