material
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. 18 17, another Englishman Roberts adopted a four-stage pulley and rear wheel mechanism to change the spindle speed.
The earliest milling machine was a horizontal milling machine created by American Whitney in 18 18. In order to mill the spiral groove of twist drill, American Brown made the first universal milling machine in 1862, which is the prototype of the lifting table milling machine.
Form; 1884 or so, the gantry milling machine reappeared; In the 1920s, a semi-automatic milling machine appeared, and the workbench can be automatically switched between "feed-speed" or "speed-feed" by using a stop.
After 1950, the control system of milling machine developed rapidly, and the application of digital control greatly improved the automation degree of milling machine. Especially after 1970s, the numerical control system of microprocessor and automatic tool changing system were developed.
The application in milling machine expands the machining range of milling machine and improves the machining accuracy and efficiency.
There are many kinds of milling machines, which are generally distinguished by layout and scope of application. There are mainly lifting table milling machines, gantry milling machines, single-column milling machines and single-arm milling machines, instrument milling machines and tool milling machines.
There are universal, horizontal and vertical lifting table milling machines, which are mainly used to process small and medium-sized parts and are widely used. Gantry milling machines include gantry milling and boring machines, gantry milling and planing machines and double-column milling machines, all of which are used to process large parts. Single column milling machine
The horizontal milling head can move along the column guide rail, and the workbench can feed longitudinally; Vertical milling head of single-arm milling machine