5.2.6 Boring (boring 2) CYCLE86

Programming:

CYCLE86 (RTP, RFP, SFD, DEP, RDP, DTB, SDIR, RPFA, RPSA, RPTA, POSS)

Parameters:

Fig.5.7 CYCLE86

Function:

The cycle supports the boring of holes with a boring bar. The tool drills at the programmed spindle speed and feedrate velocity up to the entered drilling depth. With boring 2, oriented spindle stop is activated once the drilling depth has been reached. Then, the programmed retraction positions are approached in rapid traverse and, from there, the retraction plane.

Sequence:

1. Approach of the reference plane brought forward by the safety clearance by using G00

2. Traversing to final drilling depth with G01 and the feedrate programmed prior to the cycle call

3. Dwell time to final drilling depth

4. Oriented spindle stop at the spindle position programmed under POSS

5. Traverse retraction path in up to three axes with G00

6. Retraction in the boring axis to the reference plane brought forward by the safety clearance by using G00

7. Retraction to the retraction plane with G00 (initial drilling position in both axes of the plane)

Explanation of the parameters:

1. For the parameters RTP,RFP,SFD,DEP,RDP, see CYCLE81

2. DTB(dwell time): The dwell time to the final drilling depth (chip breakage) is programmed under DTB in seconds.

3. SDIR(direction of rotation): With this parameter, you determine the direction of rotation with which boring is performed in the cycle. If values other than 3 or 4 (M03/M04) are generated, alarm is generated and the cycle is not executed.

4. RPFA(retraction path along the 1st axis): Use this parameter to define a retraction motion along the 1st axis (abscissa), which is performed after reaching the final drilling depth and oriented spindle stop.

5. RPSA(retraction path along the 2nd axis): Use this parameter to define a retraction motion along the 2nd axis (ordinate), which is performed after reaching the final drilling depth and oriented spindle stop.

6. RPTA(retraction path along the boring axis): You use this parameter to define a retraction movement along the drilling axis, which is executed after the final drilling axis has been reached and oriented spindle stop has been performed.

7. POSS(spindle position): Use POSS to program the spindle position for the oriented spindle stop in degrees, which is performed after the final drilling depth has been reached.

Note    

Cycle CYCLE86 can be used if the spindle to be used for the boring operation is technically able to go into position-controlled spindle operation.

Example:

The program machines a boring with cycle CYCLE85. The drilling axis is always the Z axis. Programming zero point is the center of end face. Dwell time is 1 second.