Method for turning holes with floating boring tool of CNC lathe

CNC lathe machine manufacturer China shares that the hole-turning method of floating boring tool is to install the cutter head with positive and negative symmetry of two cutting edges in the square hole of the tool bar, the lathe tool head can be freely floated in the radial direction, and automatically aligned with the bottom hole, that is, the center of the surface to be processed.

This kind of cutting method makes the positive and negative cutting edges bear the cutting uniformly and make balanced symmetrical cutting, thus counteracting the radial resistance and making the center of the cutting head always coaxial with the rotating center of the workpiece, thus improving the rigidity of the turning tool with inner hole and making the cutting smooth. Floating boring tool tool hole available f? L diameter ~30mm above the precision of the L jiDI' can be obtained. -0 8 "m above the surface roughness value and IT8 uiwjr.t; % Sf.

Floating boring cutter structure has a whole type and assembly type, when turning a larger aperture, can be used 'assembly type' in order to adjust the radial size. Lathe precision boring tool head can be used in the form of polished edge of cylindrical turning tool, in the front and rear end of straight polished edge, grinding 2. Or the transitional blade of a ship.

However, the floating boring cutter only with the bottom hole axis cutting, and can not change the bottom hole straightness and coaxiality. Therefore, in the use of floating boring cutter, we must first ensure the machining accuracy of the bottom iL, that is, both appropriate and uniform machining allowance, but also a good surface straightness and coaxiality and other shape and position accuracy. For this purpose, the lathe may first adopt the method of supporting long tool rod to process the bottom hole, and then the floating boring.

In addition to the lathe, in the use of floating boring tool hole, also should pay attention to the following problems:

1) the gap between the lathe tool head and the square hole of the tool rod must be kept, and the gap should not be larger than. . 02 mm.

2) the lathe tool rod should be counterbalanced with the workpiece rotating center, the square hole should be round and smooth, the center line should pass the spindle axis, the inner side should be perpendicular to the workpiece rotating axis.

3) the positive and negative cutting edges of the CNC lathe machine head shall be symmetrically parallel to each other, on the symmetry axis of the workpiece's inner hole, and parallel to the rotating axis of the lathe.

4) the floating boring cutter of lathe is only suitable for continuous cutting. It is forbidden to cut intermittently with grooves on the hole wall.

0.2mm, in the use of high-speed iO head cutting ~, should choose a small cutting amount, machining allowance should be less than 0 2mm, cutting speed of lo-n/m, such as into JJ~himrdrk", and add enough coolant.

6) the floating cutter head should have enough strength and abrasion resistance to prevent the cutting edge from abrasion and affect the processing quality.

7) in order to eliminate chips in time, high-pressure pump can be used to inject coolant when necessary.