Robotic arm turning and milling composite machining, CNC machining, component machining

Mill-Turn MachiningIn this context, the workpiece’s rotational speed is solely related to the feed rate; when machining various grooves and performing undercut finishing, the machining of non-continuous surfaces can result in intermittent cutting; in conventional turning operations, this can generate impact loads that are detrimental to the machining process, leading to poor surface finish and premature tool wear; In turn-mill composite machining, the tool used is a milling cutter, and milling itself involves intermittent cutting under cyclically varying loads.

Combined turning and milling has the following characteristics:

1. Use a high-precision built-in spindle;

2. The freely movable control panel improves operational efficiency;

3. Various small components and complex parts; the machine is primarily designed for high-volume production, high-speed machining and versatile machining operations.

4. Particularly in cases involving thin, long parts with complex manufacturing processes, it is possible to achieve one-off machining to form the part, and an automatic feeding system can be fitted to improve efficiency.

5. Materials: Machinable materials, copper, iron, aluminium alloys, stainless steel, Teflon, etc.

In turning-milling composite machining centres, there are four fundamental movements: the rotation of the milling cutter, the rotation of the workpiece, the axial feed of the milling cutter, and the radial feed. Depending on the relative position of the workpiece’s axis of rotation to that of the cutter, turning-milling operations can be broadly classified into axial turning-milling, orthogonal turning-milling and general turning-milling; Of these, axial turning and milling and orthogonal turning and milling are the two most widely applied turning and milling methods. In axial turning and milling, as the milling cutter and the workpiece’s axes of rotation are parallel, it is capable of machining not only external cylindrical surfaces but also internal bore surfaces. In orthogonal turning and milling, as the milling cutter is perpendicular to the workpiece’s axis of rotation, it cannot be used to machine internal bores when the bore diameter is small; however, when machining external cylindrical surfaces, as the longitudinal travel of the milling cutter is unrestricted, and a larger longitudinal feed rate can be employed, it is therefore more efficient when machining external cylindrical surfaces.

Combined turning and milling has its own specific applications and advantages; the main points are set out below.

1. Machining discontinuous surfaces can result in intermittent cutting, such as when machining various types of grooves or performing undercut finishing. In conventional turning operations, this can generate impact loads that are detrimental to the machining process, resulting in poor surface finish and premature tool wear. In turn-mill composite machining, the tool used is a milling cutter, and milling itself involves intermittent cutting during periods of cyclic load variation.

2. When the material being machined produces long chips, chip formation becomes a challenging issue during turning operations, and finding the appropriate chipbreaker for the turning tool is by no means an easy task. In contrast, milling cutters used in turn-mill operations produce short chips, which significantly improves chip control.

3. Taking the machining of crankshafts and spindles with eccentric journals as an example, during the turning process, ⁠the eccentric mass of workpieces such as crankshaft journals and eccentric cams can generate unbalanced forces, which in turn have an adverse effect on machining. However, turning-milling combination machining, by utilising low workpiece speeds, avoids such negative effects. Modern multi-tasking machine tools are equipped with a B-axis that enables tool rotation and movement, as well as advanced control systems and cutting-edge CAM software, enable the workpiece to complete the main machining tasks in a single set-up. Introducing turning-milling combined machining into production not only resolves machining challenges but also significantly increases output. Furthermore, by adopting this relatively new machining method, productivity will be substantially enhanced,CNC machine toolsAlthough widely accepted and used, the development of metal-cutting machine tools remains overly traditional, with specific machines being developed according to their respective functions, such as turning, milling and drilling. If machining centres capable of holding rotary tools such as milling cutters or drill bits could be integrated for CNC turning operations, this would reduce downtime by minimising the number of times a workpiece needs to be clamped and moved from one machine to another, and improve machining efficiency. This drive for greater efficiency has led to the innovation of fitting rotating power heads onto traditional CNC lathes, thereby enabling combined turning and milling operations.

Turning and milling is a machining process that utilises the combined motion of a rotating milling cutter and a rotating workpiece to achieve the desired finish. It is a method that ensures the workpiece meets requirements in terms of dimensional accuracy, positional accuracy, and the integrity of the machined surface, to meet the requirements of use.machiningMethod. Turning-milling composite machining does not simply involve integrating turning and milling operations onto a single machine tool, but rather utilises combined turning and milling motions to machine various external surfaces; it represents a completely new cutting theory and cutting technology that has emerged against the backdrop of significant advancements in modern CNC technology.

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