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Stuff [UK] (April 2015)

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Stuff evokes and nurtures a fondness for instruments. We lead them to glance extraordinary and clarify in a quick, convinced and unfalteringly exciting means how they're going to improve our readers' lives.

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Sample text

2 Placement and Allocation of Structural Configuration Entities As already stated, the structural body component is, in principle, of boxand stab-like beam, and in due course should be of closed cross-sectional 12 In the era of the traditional machine tool, such an open space is capable of allocating various handles, levers, measuring devices, and so on, and thus very helpful for the ease of operation. 21 22 Chapter One type. For reasons of installing electric and electronic equipment, driving motor, gearbox, and so on within the structural body component, however, there are a considerable number of apertures.

Of these, the cutting force is dominant in small- and medium-sized machine tools. As shown in Fig. 1-14, cutting force comprises three components—static, dynamic, and fluctuation. 6 6 Swarf is one of the British technical terms to represent the chip in American English; however, the term swarf is very convenient to classify itself into various shapes, ranging from the tangled formation of long helices (bushy swarf), through broken chips and short helices, to dust and sludge. In discussing the thermal engineering problem in machining, the shape and size of the swarf are crucial, and thus we use the term swarf within this book.

5 W/m2K. In summary, on the basis of the numerical calculation, we can observe the representative thermal behavior of the machine tool structure as follows: 1. The temperature of the column changes, which delays variations in the surrounding temperature. Moreover, the temperature of the front wall varies delaying that of the rear wall. So, there is a temperature difference between the front and rear walls. In due time, the thermal expansion at the front and rear wall, ∆zf and ∆zr , will be different.

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