logging in or signing up CNC MACHINE ggeethapraveen Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 4464 Category: Product Traini.. License: All Rights Reserved Like it (1) Dislike it (0) Added: May 17, 2012 This Presentation is Public Favorites: 0 Presentation Description developments in machines Comments Posting comment... Premium member Presentation Transcript PowerPoint Presentation: DEVELOPMENTS IN NC MACHINESINTRODUCTION: INTRODUCTION NC machines are the most standardized form of manufacturing the parts required to produce a product and The earliest CNC machines received code instructions through hard-wired controllers, which meant that the programming format could not be altered in 1970 s and in this presentation we can see developments in the tools, tool holding devices, work holding devices, machining technique, and reference measurement etcELEMENTS OF A NC SYSTEM: ELEMENTS OF A NC SYSTEM PROGRAMMING TOOLING MACHINING TOOL HOLDING WORK HOLDING REFERENCE MEASURING IN PROCESS INSPECTION1. PROGRAMMING SYSTEMS: 1. PROGRAMMING SYSTEMS O0013 N0005 G53 N0010 T0404 N0020 G57 G00 X26.00 Z0.0 S500 M04 N0030 G01 X-0.20 F100 G01 Linear interpolation (cutting) X-0.20 Move only in x direction until you pass the center by 0.1 mm (facing) F100 Set feed rate to 100 mm/min. G00 Move rapidly away from work piece (no cutting) to location x= 23.0 (11.50 from zero) and z = 2.0. APT Program InterpretationPowerPoint Presentation: Automatic Part Programming: Developments Software can generate program automatically from model Make 3D model Define Tool CNC data Simulate cutting Part program Generation and MachiningPowerPoint Presentation: Automatic part programming and DNC Very complex part shapes very large NC program NC controller memory may not handle HUGE part program computer feeds few blocks of NC program to controller When almost all blocks executed, controller requests more blocks2. DEVELOPMENTS IN TOOLING : 2. DEVELOPMENTS IN TOOLING HSS TOOLS POLY CRYSTALLINE DIAMOND TOOLS CEMENTED CARBIDE3. Conventional machining: 3. Conventional machining Rough – machining and semi finishing with the material in a soft i state (30-40hrc) Heat treatment to obtain the required hardness (55-60hrc) Electron discharge machining of particular zones of the die or of the matrix with very small rays or very deep cavities Finishing of the remaining part of the die Manual working to obtain the geometry and accuracy required manual polishingHIGH SPEED MACHINING: HIGH SPEED MACHINING High speed rough machining and semi finishing with the material in a solid state (30-40hrc) Heat treatment to obtain required hardness (55-60hrc) High speed finishing and super finishing with the tool suitable for the specified materialDEVELOPMENTS IN PROGRAMMING: DEVELOPMENTS IN PROGRAMMING Cutter dia: 63mm (3/4th used) Depth of cut: 6mm Spindle speed: 800 rpm Feed rate: 0.6 meters/min Metal removal rate: 170cm 3/min Cutter dia: 63mm (3/4th used) Depth of cut: 2mm Spindle speed: 2800 rpm Feed rate: 3.8 meters/min Metal removal rate: 243cm 3/min High speed machining Conventional machiningPowerPoint Presentation: HSK : Hohl Shaft Kegel (German) Means Hollow Shank Taper Using centrifugal force principal and through coolant holders USED FOR SPEEDS <10000 4. DEVELOPMENTS IN TOOL HOLDING DEVICES BT -50\40 HOLDER USED FOR SPEEDS >100005. WORK HOLDING DEVICES: 5. WORK HOLDING DEVICESDEVELOPMENTS IN WORK HOLDING DEVICES: DEVELOPMENTS IN WORK HOLDING DEVICES Hydraulic clamping Pneumatic clamping Vacuum clamping Magnetic clamping6. REFERENCE MEASURING: 6. REFERENCE MEASURING Dial gauge : Used for dialing the fixtures and taking references of the work pieces Touch probe : Used for taking References of the work pieces Which directly enters the reference values in the work Coordinates of the machine7. INPROCESS INSPECTION: 7. INPROCESS INSPECTION The touch probe can inspect the preprogrammed dimensions in the machine itself and the dimensional Report can be saved and even taken a Print out.PowerPoint Presentation: NC MACHINE OF 1970’s LATEST 5-AXIS CNC MACHINE 5-AXIS MACHINE AT DIFFERENT ORIENTATIONS You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.