Programming technological functions (cycles)
8.2 Milling
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
299
8.2.4
Rectangular spigot (CYCLE76)
Function
You can mill various rectangular spigots with the "Rectangular spigot" cycle.
You can select from the following shapes with or without a corner radius:
Depending on the dimensions of the rectangular spigot in the workpiece drawing, you can
select a corresponding reference point for the rectangular spigot.
In addition to the required rectangular spigot, you must also define a blank spigot, i.e. the
outer limits of the material. The tool moves at rapid traverse outside this area. The blank
spigot must not overlap adjacent blank spigots and is automatically placed by the cycle in a
central position on the finished spigot.
The rectangular spigot is machined using only one infeed. If you want to machine the spigot
using multiple infeeds, you must program the "Rectangular spigot" cycle several times with a
reducing finishing allowance.
Sequence
1.
The tool approaches the starting point at rapid traverse at the height of the retraction
plane and is fed in to the safety clearance. The starting point is on the positive X axis
rotated through α0.
2.
The tool approaches the spigot contour sideways in a semicircle at machining feedrate.
The tool first executes infeed at machining depth and then moves in the plane. The
rectangular spigot is machined depending on the programmed machining direction (up-
cut/down-cut) in a clockwise or counterclockwise direction.
3.
When the rectangular spigot has been traversed once, the tool retracts from the contour
in a semicircle and then infeed to the next machining depth is performed.
4.
The rectangular spigot is approached again in a semicircle and traversed once. This
process is repeated until the programmed spigot depth is reached.
5.
The tool moves back to the safety clearance at rapid traverse.
Machining type
●
Roughing
Roughing involves moving around the rectangular spigot until the programmed finishing
allowance has been reached.
●
Finishing
If you have programmed a finishing allowance, the rectangular spigot is moved around
until depth Z1 is reached.
●
Chamfering
Chamfering involves edge breaking at the upper edge of the rectangular spigot.
Summary of Contents for SINUMERIK 840D
Page 6: ...Preface Milling 6 Operating Manual 03 2010 6FC5398 7CP20 1BA0 ...
Page 50: ...Introduction 1 4 User interface Milling 50 Operating Manual 03 2010 6FC5398 7CP20 1BA0 ...
Page 600: ...Appendix A 2 Overview Milling 600 Operating Manual 03 2010 6FC5398 7CP20 1BA0 ...
Page 610: ...Index Milling 610 Operating Manual 03 2010 6FC5398 7CP20 1BA0 ...
