The lathe structure of three boxes, two bars and two machines refers to

The three boxes, two rods and two machines of lathe structure refer to spindle box (spindle box), feed box (feed box), slide box, polished rod, lead screw, tool rest and tailstock.

In ancient times, lathes were cut by pulling or pedaling, rotating workpieces through ropes and holding knives. 1797, the British mechanical inventor Maudslay created a modern lathe with a lead screw driving the tool rest. 1800 adopted gear exchange, which can change the feed speed and the pitch of the processed thread.

Lathe type:

According to different purposes and structures, lathes are mainly divided into horizontal lathes and floor lathes, vertical lathes, turret lathes, single-axis automatic lathes, multi-axis automatic lathes and semi-automatic lathes, copying lathes and multi-tool lathes, and various special lathes, such as camshaft lathes, crankshaft lathes, wheel lathes and shovel lathes. Among all lathes, the horizontal lathe is the most widely used.

The tolerance level of machining dimensions of horizontal lathe can reach IT8~IT7, and the surface roughness Ra can reach 65438 0.6 μ m. In recent years, computer technology has been widely used in machine tool manufacturing, followed by electromechanical integration products such as CNC lathes and turning centers.