Process application of CNC planer boring milling machine in precision and complex part machining

The modern manufacturing industry has put forward higher requirements for the machining accuracy and efficiency of large and complex parts. The CNC planer boring and milling machine can achieve multi process machining such as boring, milling, drilling, and tapping in one clamping by flexibly coordinating the movement of the worktable and the lifting of the spindle box, supplemented by various accessory milling heads. It can significantly shorten the production cycle while ensuring the form and position tolerances.

In the aerospace field, large aluminum or titanium alloy frame parts such as aircraft wing body docking frames and integral wall panels have the characteristics of large size, complex structure, thin walls, and high material removal rate. The CNC planer boring and milling machine has significant advantages in the processing of such parts: firstly, its "moving table static column" structure makes the thermal deformation of the spindle system more stable, providing conditions for long-term precision machining; Secondly, the high rigidity bed can effectively suppress cutting chatter and achieve excellent surface quality. By equipping a five axis linked CNC rotary oscillating head, the machine tool can transform into a precision composite machining center, completing complex surface contour milling, oblique hole precision boring, and internal cavity precision machining in one clamping, ensuring precise relative positions between various features of the parts.

The size of stamping molds and precision injection molds for large automotive panels can reach several meters, with complex profiles and high requirements for smoothness. The long stroke worktable of the CNC planer boring and milling machine can easily clamp large mold blanks, with an X-axis stroke of usually 3000-8000mm. During the machining process, the fixed spindle combined with high-speed milling technology can perform high-speed precision machining on complex mold surfaces, and the surface quality directly meets or approaches the polishing requirements. More importantly, the excellent geometric accuracy retention of the machine tool ensures consistent dimensional accuracy during long-term processing of large molds. The integrated capability of rough and fine machining reduces equipment turnover and significantly shortens the mold manufacturing cycle.

In the field of construction machinery, welded components such as excavator boom, bucket arm, and pump truck support arm have irregular shapes and large sizes. The layout feature of separating the worktable of the planer boring milling machine from the main machine facilitates flexible arrangement of workpiece positions and avoids machining interference. For gearbox, engine body and other casing parts, machine tools can solve the problem of long hole machining through the turning and boring process. Research has shown that turning the worktable 180 ° for boring has become the main method for machining coaxial hole systems on planer boring and milling machines. By precisely controlling the rotary indexing error and lateral positioning error of the worktable, the coaxiality requirements of the long hole can be ensured.

To expand the range of processes, the planer boring and milling machine can be equipped with various accessories. Fixed rotary disc is suitable for boring large diameter holes and turning end faces; The right angle milling head can convert the vertical spindle into a horizontal direction, making it easy to machine the inner side of the box; The universal milling head can achieve the machining of inclined surfaces at any angle. The double-sided planer boring and milling machine adopts a cross shaped layout, and the left and right dual spindles can simultaneously bore both sides of the workpiece, which is particularly suitable for simultaneous machining of parts such as pump truck support arms, with high coaxiality and greatly improved efficiency. The configuration of automatic tool exchange system (tool magazine) and cutting fluid internal cooling system further enhances the automation level and deep hole machining capability of the machine tool.