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Machining engineering materials by turning
Published in David Salmon, Penny Powdrill, Mechanical Engineering Level 2 NVQ, 2012
Tailstock – The tailstock is used for mounting various hole-cutting tools (e.g. drills and reamers) or a machine centre (to support a long workpiece). It is mounted on the bed's inner slideway and can be manually positioned. It can be locked into any position on the bed with a lever. The tailstock contains a barrel that can be wound forward and backwards by a hand wheel. The barrel can be locked into position with a second lever. There is a Morse-tapered hole in the tailstock barrel, and when measured from the bed, the height of the point of a machine centre mounted on the tailstock barrel is exactly the same as that of the machine centre mounted in the spindle.
Engineered products
Published in Mike Tooley, Engineering GCSE, 2012
Figure 2.71(a) shows a long bar held between centres. To ensure that the work is truly cylindrical with no taper, the axis of the tailstock centre must be in line with the axis of the headstock spindle. The saddle traverse provides movement of the tool parallel with the workpiece axis. You take a test cut and measure the diameter of the bar at both ends. If all is well, the diameter should be constant all along the bar. If not, the lateral movement of the tailstock needs to be adjusted until a constant measurement is obtained. The depth of cut is controlled by micrometer adjustment of the cross-slide.
Make engineered products
Published in Mike Tooley, Engineering GNVQ: Intermediate, 2012
Figure 3.81(a) shows a long bar held between centres. To ensure that the work is truly cylindrical with no taper, the axis of the tailstock centre must be in line with the axis of the headstock spindle. The saddle traverse provides movement of the tool parallel with the workpiece axis. You take a test cut and measure the diameter of the bar at both ends. If all is well, the diameter should be constant all along the bar. If not, the lateral movement of the tailstock needs to be adjusted until a constant measurement is obtained. The depth of cut is controlled by micrometer adjustment of the cross-slide.
The customer satisfaction-oriented planning method for redesign parameters of used machine tools
Published in International Journal of Production Research, 2019
Xingyu Jiang, Boxue Song, Li Li, Mingming Dai, Haoyin Zhang
Analysing the results obtained by the improved equations, the runout in spindle nose need not to be improved. To improve the parallelism from spindle axis to slide, spindle holes were reprocessed using spraying techniques and then grinded to recover the original precision. Besides, the installation surface of spindle box was also regrinded to ensure the assembly precision. To improve the parallelism of the tailstock sleeve axis to the slide carriage, the spindle hole of tailstock sleeve was reprocessed as the same of spindle holes of the spindle box. Besides, the rail guide is processed using laser cladding and then regrinded to improve the straightness. The equal altitudes between headstock and tailstock need not to be improved.