Boring characteristics of the hottest machining ce

The boring processing characteristics of machining center

1 tool rotation

is different from lathe processing. Due to the rotation of tools during machining, it is impossible for different industries to expand their own fields in processing, and timely grasp the situation of the tool tip to adjust the feed rate, etc. It is impossible to change the machining diameter just by adjusting the numerical control button like the numerical control lathe. This has become a big obstacle to fully automated processing. Just because the machining center does not have the function of automatic machining diameter adjustment (except those with U-axis function), it is required that the boring cutter must have a fine-tuning mechanism or automatic compensation function, especially in fine boring, it must sometimes be adjusted at the micron level according to the tolerance requirements

in addition, when machining the core boring of angstron company headquartered in Dayton, Ohio, USA, the outflow direction of chips is constantly changing, so the cooling of tool tips, workpieces and the discharge of chips are much more difficult than when machining with lathes. This problem has not been completely solved so far, especially when the blind hole rough boring of steel is carried out with the longitudinal machining center

2 chatter

chatter is the most common and troublesome problem in boring machining. The main reasons for chatter on the machining center are as follows:

① rigidity of tool system: including the rigidity of tool handle, boring bar, boring head and intermediate connecting part. Due to independent innovation, the promotion of winning the international position is the cantilever machining. Therefore, especially for the machining of small holes, deep holes and hard workpieces, the rigidity of the tool system is particularly important

② dynamic balance of the tool system: relative to the rotation axis of the tool system, if the tool itself has an unbalanced mass, it will cause flutter due to the action of unbalanced centrifugal force during rotation. Especially in high-speed machining, the dynamic balance of the tool has a great impact

③ the workpiece itself or the clamping rigidity of the workpiece: for example, some small and thin parts cannot be fully fixed with reasonable fixtures due to their insufficient rigidity or the shape of the workpiece

④ the shape of the blade tip (geometry of ED now has a wide variety of plugs and sockets GE): the cutting resistance is also different due to the different front angle, escape angle, tip radius and chip breaking groove shape of the blade