tailieunhanh - Machining and Monitoring Strategies Part 7

Tham khảo tài liệu 'machining and monitoring strategies part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Machining and Monitoring Strategies 491 a Typical Ballbar plot on a Cincinnati Milacron Sabre 500 vertical machining centre. BALLBAR SET FOR DYNAMIC CIRCULAR TESTING BEING SET AT DISC DIAMETER. Courtesy of RENISHAW pic . - cw ccw Scale 10 pm b Machinable aerospace-specification aluminium discs data obtained from hole positions and disk OD s on a stereometric artefact HSM on a Sabre 500 machining Centre from a CNC ITP bridge-type CMM. Current Point RO 47pm Thota 45 O Difference oefta R 0 47pm delta Tnota45 0 CIRCULAR INTERPOLATED HOLES IN THE DISCS EQUATES TO A STEREOMETRY OE A TRUNCATED CONIC FRUSTUM WITH AN INCLUDED ANGLE OE c Typical roundness data for obtained on a Talyrond 265 roundness measuring machine with discs in-situ on the precision cylindrically -ground stereometric mandrel LEAST SQUARES CIRCLE LSC ROUNDNESS PROFILE PLOT FILTER Gaussian. FILTER RANGE l-SOupr DATUM Spindir centrrlinr. Courtesy of Taylor Hobson plc Figure 242. HSM milling of three machinable disks in-situ on a stereometric artefact on a vertical machining centre. Source Smith Sims Hope Gull 2001 492 Chapter 9 cranked-probe - with its calibration obtained from the reference measurement sphere being located on the CMM s table utilised to inspect the Ộ10 mm hole geometry and there respective co-ordinate positions. This probe arrangement was swapped for a conventional touch-trigger probe assembly to measure the machinable disk diameters - while holding the same cartesian co-ordinate relationships as when it was originally UHM. Later - without breaking-down while still maintaining the same angular orientation this stereometric artefact assembly was inspected on a roundness testing machine Taylor Hobson Talyrond 265 for individual disk parameters of roundness and cylindricity3 assessment - for the three-disk relationship . The results of all of these averaged roundness measurements and Ballbar polar plots are graphically depicted as histograms in Fig. 243c. When a comparison is made of .