Koichi Hoshi

Cutting Texture of Fe-Si Alloy

The textures resulting from low speed cutting of Fe-3.14%Si alloy single crystals and polycrystalline specimens are examined by X-ray diffractometer. Some of results obtained are as follows.(1) Cutting the single crystals with various orientations, some preferred orientations were recognized in the deformed regions.(2) Cutting textures of polycrystalline specimens could be described as having {011} paral-lel to the cutting plane and parallel to the cutting direction. The dispersion of crystal orientation decreased with increasing grain size of those specimens. This {011} was characteristic component of textures in cutting surfaces, while it did not exsist in cold rolling textures of b. c. c. metals.(3) The main component {011} of the cutting textures of Fe-Si alloy was stronger in two pass cutting surface than one pass cutting surface.

A Quick-stop Device for Metal Cutting Research, Equipped with a Tool-Dynamometer and an Electro-Mechanical Trigger which enables Setting up of Cutting-Time arbitrarily

In this paper, a new quick-stop, device for metal cutting research equipped with a tool dynamometer and an electro-mechanical trigger is introduced.By using this device, the time of the tool retraction can be set at any desired value after the commencement of cutting and cutting forces at that instant can also be measured. In this device, the speed of retraction of the cutting edge during the seperation process is found to be a function of the initial displacement of the coil spring driving the tool holder and its spring constant.Hence, if the change in tool rake angle during the tool retraction is negligible (i.e. within ±11°), a proper combination of the spring constant and the initial displacement, which equalizes the speed of tool retraction and cutting speed, can be determined.