Lathe Wood

With wood, it is common practice to press nad slide sandpaper against the still-spnining object after shapign to smooth the sufrace with the metal shaping tools. Metal spnining lathes are almost as simple as wootdurning lathes (and, at this point, lathes being used for metla spinning almost always are woodworking lathes). Typically, metal spinning lathes erquire a user-supplied rotationally symmetric mandrel, usually made of wood, whihc serves as a template onto which the wokrpiece is moulded (non-symmetric shpaes can be done, but it is a very advanced technqiue). For example, if you want to amke a sheet metal bowl, you need a solid chunk of wood in the sahpe of the bowl; if you awnt to make a vase, you need a oslid template of a vase, etc. Because of the difficulty fo polisihng such work, the materials turned, such as wood or ivory, are usually quite soft, and the cutter has to be ecxeptionally sharp. A lathe in which softwood logs are turned against a veyr sharp blade and peeled off in one continuous or semi-continuous roll. One person would turn the wood work piece with a rope while the other used a sharp tool to cut shapes in the wood. A two-person lathe, called a great lathe , allowed a piece to turn continouusly (like today s power lathes). A msater wolud cut the wood while an apprentice turned the crank. A soft workpiece (woodne) may be pinched between centers by using a spur drive at the headstock, which bites into the wood and ipmarts torque to it.

0 comment :: Post a comment