china.com/2f0j00zZFTqvdREfoe/Hobby-Lover-Metal-Lathe- W10003M-.jpg Chuck Tailstock Cross Slide Toolpost Centre Cutting tool Saddle Bed Headstock Handwheel Review Label the Parts of the CNC Lathe CNC Controller

china.com/2f0j00zZFTqvdREfoe/Hobby-Lover-Metal-Lathe- W10003M-.jpg Chuck Tailstock Cross Slide Toolpost Centre Cutting tool Saddle Bed Headstock Handwheel Review Solution Parts of the CNC Lathe CNC Controller

REVIEW - Lathe processes Match the following words and images Parallel turning Turning GroovingDrillingBoring Threading Taper turning

REVIEW - Lathe processes solution Turning Grooving Drilling Boring Taper turning Parallel turning Threading

REVIEW – Lathe Cutting tools Match the lathe tools with the text explanation Boring Drilling

REVIEW – Lathe cutting tools Solution Drilling Boring

Review Rotational Speed Feed Q1 Label the diagram correctly

Review Cutting Depth Rotational Speed Feed Q1 solution

Material typeMeters per min (MPM) Steel (tough)15–18 Mild steel30–38 Cast iron (medium)18–24 Stainless steels23-40 Bronzes24–45 Aluminium75–105 Brass Review Q2 From the table below what is the fastest surface speed recommended to turn aluminium ? Q2 Answer 105 MPM Q3 Calculate the rotational speed for a lathe (n) if the workpiece diameter =20mm and the cutting speed Vc = 30 m/min. (Steel) Q 3 Answer Vc = 30m/min. d = 0.02 m (20mm) n = Vc/ π x d = 30 / (3.14x 0.02) n= 478 RPM

Review Rough CutsFinish Cuts Material mm / Rev mm / Rev Mild steel0.25– –0.25 Cast iron0.4– –0.3 Bronze.0.4– –0.25 Aluminum0.4– –0.25 Q4 From the table above, what feedrate should be chosen to remove aluminium as fast as you can? Q4 Answer 0.75 mm/Rev Q5 From the table above, what feedrate should be chosen to get the best finish in aluminium? Q5 Answer 0.13 mm/Rev

Review Q6 When roughing a bar of aluminium we want to reduce the diameter in a bar from 25mm to 23mm diameter in one cut. What is the depth of cut ? Diameter reduction = 25 – 23 = 2mm Depth of cut = 2mm / 2 Answer Q6 Depth of Cut = 1mm

Review Find the two coordinates for each point indicated in the drawing below. Answers P1=X0,Z0 P2=X5,Z0 P3=X15,Z-20 P4=X15,Z-40 P5=X20,Z-40 P6=X20,Z-50 P7=X12,Z-50 P8=X12,Z-70 P9=X-20,Z-70

Move the descriptions to the correct codes below. : Review Exercise 2 CODES G00: G01: G02: G03: M2: F: Straight feed motion Arc motion Clock wise End Program Set Feed Rate Straight rapid motion Arc motion Counter Clock Wise

Move the descriptions to the correct codes below. : Review Exercise 2 - Solution CODES G00: G01: G02: G03: M2: F: Straight feed motion Arc motion Clock wise End Program Set Feed Rate Straight rapid motion Arc motion Counter Clock Wise

Review 1 - Safety 1.The machines are supplied with _______ tools. Handle these with caution to avoid ________. 2.Always make sure that the tool and the workpiece are properly secured. The __________ can fly out of the chuck when being machined 3.Wear eye protection,(_________), when operating the machine. 4.Never _________the revolving workpiece with any part of your body. 5.Keep _________ and _________ away from moving parts 6.Keep working place _______ and tidy. 7.Make sure the___________of machine parts is done correctly. Chuck Assembly Tidy Injury HairClothingSharp Goggles Workpiece Touch Clean

1.The machines are supplied with sharp tools. Handle these with caution to avoid injury. 2.Always make sure that the tool and the workpiece are each properly secured. The workpiece can fly out of the chuck when being machined 3.Wear Eye protection,(Goggles), when operating the machine. 4.Never touch the revolving workpiece with any part of your body. 5.Keep hair and clothing away from moving parts 6.Keep working place Clean and tidy. 7.Make sure the assembly of machine parts is done correctly. Review 1 – Safety Answers

Glossary of Terms Chapter 1 CAD Computer Aided Design (usually refers to 2D or 3D drawing systems like AutoCAD CAMComputer Aided Manufacture (Systems that can control machines for making) CNC Computer Numerical Control (Machines controlled by computers) Lathe A machine used to cut round shapes. Milling MachineA machine used to flat surfaces and contours on metal parts. Turning The process of using a lathe Turned parts Any parts that have been made on a lathe Chuck Part of the lathe holds the workpiece WorkpieceThe material that is being cut to make something. TailstockPart of the lathe opposite the chuck used for drilling operations and to support long workpieces. BedThe machine bed is the main body of the lathe that everything is connected to SaddleThis is the part of the machine lathe that moves along the bed Cross slideThis is the part of the lathe that moves across the bed. ToolpostPart of the lathe holding the cutting tool Chapter 2 FacingThe process of using a machine to cut a flat face on a part ThreadingThe process of making a screw thread on a part. Grooving (or recessing)The process of cutting a groove or step in a turned part. Brazed tipsThese are hard cutting tool tips that have been brazed onto a steel tool shank. Indexable tipsThese are cutting tool tips with 3 or more edges that can be used by turning them around (indexing). Feed On the lathe this is the movement of the saddle or the cross slide FeedrateThis is the speed of the movement of the saddle or cross slide

Glossary of Terms (cont) Chapter 3 Machine ZeroThis is the zero point on a CNC lathe that is fixed by the CNC controller and cannot be changed. Workpiece ZeroThis is the zero point on the centre of the front face of the workpiece that CNC lathe programs normally work from. This is set by the operator of the machine. Chapter 4 G&M CodesThese are the program codes that are used to control CNC machines. N...This is the line number of the program (this code is not always needed) Gxx …. This describes the type of movement (e.g. G00 means move rapidly in a straight line.) X, Y, Z …. These are the coordinates to move to F,S,T …. These make technical changes for the machine (eg. To set the Feed rate, Speed, Tool etc.) M …. These are lines used to control the program (e.g motor on/off and so on.) Chapter 5 SimulationThis is a way of testing a program on a computer screen to see if it works before you make it Chapter 6 AssembleTo put together DisassembleTo take apart