Horizontal milling machines

The main elements of a typical knee-and-column horizontal milling machine are shown in Fig. 11.3. The elements of a vertical machine are the same except that the spindle head is mounted at the top of the column, as shown in Fig. 11.4. 

The various controls of a typical horizontal milling machine are shown in Fig. 11.7. These are identical to those of a vertical machine. 

Hguie 11.1S. Sequence of operations on horizontal milling machine... 

Name three types of cutter used on a horizontal milling machine and give a use for each. 

What is the purpose of spacing collars on a horizontal milling machine arbor. 

Consider machining the workpiece shown in Fig. 11.17, using in the first instance a horizontal milling machine and second producing the same workpiece using a vertical milling machine. 

These are fixed or moveable guards, which are adjustable for a particular operation during which they remain fixed. They are particularly used with machine tools where some access to the dangerous part is required (e.g. drills, circular saws, milling machines) and where the clearance required will vary (e.g. with the size of the cutter in use on a horizontal milling machine or with the size of the timber being sawn on a circular saw bench). 

Horizontal milling machine and some typical applications... 

PERFORMANCE OF BONDED OVERARM OF A HORIZONTAL MILLING MACHINE... 

The box overarm of a small horizontal milling machine was chosen on two grounds. Firstly, a cast iron and a fully welded component of the same type were already available, which made possible a comparison of the three manufacturing methods. Secondly, the particular horizontal milling machine had been tested on previous occasions and its dynamic behaviour was fully investigated. 

The feasibility of the technique having been established, it was applied to the fabrication of the base, column and overarm of a horizontal milling machine. - The drives, knee, spindle etc. were unchanged and hence the dimensions of the structural parts that interface with the unchanged parts were identical to those of a production model. Figure 1.13 shows the main features of the prototype. As this was to be manufactured on a one-off basis, all the double-containment joints and the V-ways were machined from solid. 

Dynamic Performance of Bonded Horizontal Milling Machine under Test Conditions... 

Fig, 1.26. Horizontal milling machines with (a) bonded structure, table size 30 in X 8 in, horsepower 2 0, and (b) cast structure, table size 30 in X 8 in,... 

Chowdhury, M. I., Sadek, M. M. and Tobias, S. A, The dynamic characteristics of epoxy resin bonded machine tool structures,/Voc. 15th Int. MTDR Conf, Birmingham, 1974, Macmillan Press, 1975, pp. 237-43. Sadek, M. M. and Tobias, S. A, Comparative dynamic acceptance tests for machine tools applied to horizontal milling machines, Appl Meek, Proc. Inst. Meek Engrs, London, 1970/71, 185(24/71), 319-37. 

Chang, H. C., Sadek, M. M. and Tobias, S. A., Relative assessment of the dynamic behaviour and cutting performance of a bonded and a cast iron horizontal milling machine, 83-Prod-10. Presented at the ASME Design and Production Engineering Technical Conference, Dearborn, Michigan, Sept. 11-14, 1983. Published in Trans. ASME (Journal of Engineering for Industry). 

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