Thread Milling CNC programming of machine tools

The thread milling tool, programming and other programming of the tool, drill edm if the processing programming error, could easily lead to tool damage or thread processing error. The preparation should note the following:

⑴ should first pilot hole for tapping processing is good, small-diameter holes with a drill processing Boring large holes should be used to ensure the accuracy of the pilot hole for tapping.

The Qie Ruqie ⑵ tool should be used for circular trajectory, usually 1/2 turn to cut into or cut out, while the Z-axis direction of the road 1/2 pitch to ensure that the thread shape. Tool radius compensation value into at this time.

(3) X-, Y-axis circular interpolation week, a pitch of the spindle along the Z-axis direction should be moving, otherwise it will cause the thread Labelling.

⑷ specific example program: thread milling cutter diameter Φ16, threaded holes for M48 × 1.5 thread hole depth is 14.

Processing procedures are as follows:

(Pilot hole for tapping program slightly, the holes should be taken to the boring bottom outlet)

G0 G90 G54 X0 Y0

G0 Z10 the M3 S1400 the M8

The G0 Z-14.75 into the knife to the thread of the deepest

G01, G41, X-16 Y0 is the F2000 moved to the location of the feed, adding the radius compensation

Unit G03, X24 Y0 is Z-14 1/2 circle arc cut I20 J0 F500, cut,

Unit G03, X24 Y0 Z0 I-24 J0 F400 - cutting the entire thread

G03 the X-16 Y0 is Z0.75 I-20 J0 F500, cut out 1/2 circle arc cut G01, G40 X0 Y0 back to the center of the abolition of the radius compensation

The G0 Z100

M30

Pick deduction method

Pick the characteristics of the deduction method

Box-type parts are sometimes encountered a large threaded hole under the tap and thread milling cutter can be used similar lathe pick buckle. Boring Bar install thread turning, boring thread.

The company has been processing a number of parts, the thread is M52x1.5, position accuracy is 0.1mm (see Figure 1), because the position require a higher degree, threaded holes can not be processed using the tap, and no thread cutter, tested , pick deduction method ensures that the processing requirements.

3.2 pick the buckle of Note

The ⑴ spindle starts, there should be delay time to ensure that the spindle to reach the rated speed.

⑵ retraction, hand grinding thread cutting tools, due to tool sharpening symmetry, can not be used to reverse the retraction must be in the spindle orientation, the tool radial movement, and then retracting.

⑶ Arbor manufacturing must be accurate, especially the location of the groove to be consistent. If not, the multi-shank processing. Otherwise it will cause chaos buckle.

⑷ even if it is a very fine buckle, pick buckle knife to pick into, or cause tooth loss, surface roughness, and there should be at least twice.

(5) processing efficiency is low, only applies to single and small, special-pitch thread and not the appropriate tool.