Where is the difference between milling machine and planer?

Milling.. is a milling machine milling tool on the workpiece. Milling machine milling, slotting, gearing, spiral and spline shafts, but also can handle complex surfaces, high-efficiency planer, widely used in machinery manufacturing and maintenance department. Gantry planer: planing, linear movement of a workpiece slot or forming surface planer. Planer processing tools are relatively simple but less productive (apart from long and narrow planar machining), which are mainly used for flats, and small batch production and machine repair shops, in mass production, and are replaced by a milling machine. Depending on the structure and properties, the planer includes a forming machine, a planer, an open side planer, and specialization (such as a planer machine, which cuts the edges of punches and planer workpieces in complex shapes).
The RAM and turret are shaped like cow heads, and are used as vertical reciprocating RAM in holders for cutting various plane and groove planers. The planer has a top beam and a portal frame structure. The named table composed of columns has a reciprocating linear movement of the workpiece. The large units used for processing (especially the long and narrow planes) are also used to machine grooves. Or process small parts in parallel on several aircraft. The large portal planer mills the head with the first part, so that you can complete the work planing, milling and surfacing work after one installation. Open side planer masts and cantilever beams reciprocate vertically along the guide rails, and larger processing widths do not require processing over the entire width of the workpiece.
The reciprocating rectilinear motion of the tool or workpiece, the workpiece and the tool, causes intermittent feed movement perpendicular to the main motion. Common planer: open side planer and planer, planer.