Steel Plate Cutting Techniques - Mazak STX SC L PLUS CONTROL Training Manual

STEEL PLATE CUTTING TECHNIQUES

WHEN CUTTING STEEL PLATE THERE ARE SEVERAL PROGRAMMING TECHNIQUES WHICH HELP
MINIMIZE THE EFFECTS OF EXCESS HEAT CAUSED BY PIERCING AND CUTTING THE MATERIAL.
THESE TECHNIQUES INCLUDE THE FOLLOWING:
1) HEAT BARRIER SEGMENTS
THIS TECHNIQUE INVOLVES CUTTING A STRAIGHT LINE BETWEEN ROWS OF PARTS IN ORDER
TO STOP HEAT TRANSFER BETWEEN ROWS. IF THE PART IS VERY HOLE INTENSIVE THIS
METHOD MAY BACKFIRE BY TRAPPING HEAT BETWEEN THE BARRIERS.
2) STAGGERING PARTS AND INTERNAL GEOMETRY.
AS EACH PART IS CUT HEAT IS TRANSFERRED TO THE SURROUNDING PLATE. IF
PARTS ARE CUT IN SUCCESSION THE HEAT FROM THE PREVIOUS PART MAY
CAUSE SELF BURNING OR POOR EDGE QUALITY ON LATTER PARTS. BY
STAGGERING THE CUT GEOMETRY, THE HEAT HAS TIME TO DISSIPATE
THEREFORE SUBSEQUENT CUTTING IS NOT EFFECTED. THERE ARE THREE
SITUATIONS WHERE THIS TECHNIQUE MAY BE APPLICABLE:
A>
B>
C>
SMALL PARTS WITH MANY INTERNAL GEOMETRIES.
IN THIS CASE EACH INTERNAL CUT MAY EFFECT THE QUALITY OF THE
NEXT INTERNAL CUT AS WELL AS THE PERIMETER.
SOLUTION: CUT ONE INTERNAL GEOMETRY AT A TIME FOR EACH PART
OVER THE ENTIRE NEST AND FINALLY CUT ALL
PERIMETERS.
LARGER PARTS WHICH HAVE INTERNAL GEOMETRIES CLOSE TOGETHER.
IN THIS CASE EACH INTERNAL CUT MAY EFFECT THE QUALITY OF THE
NEXT INTERNAL CUT IF SPACED CLOSE TOGETHER.
SOLUTION: CUT RANDOM INTERNAL GEOMETRIES WITH ADEQUATE
SPACING OVER THE ENTIRE NEST THEN CUT THE
GEOMETRIES IN BETWEEN AND THE PERIMETER.
SMALL PARTS NESTED CLOSE TOGETHER.
IN THIS CASE THE HEAT FROM THE PERIMETER OF ONE PART MAY EFFECT
THE QUALITY OF THE PERIMETER OF THE NEXT PART.
SOLUTION: STAGGER THE ENTIRE PART. CUT EVERY OTHER PART IN
EVERY OTHER ROW OVER THE ENTIRE NEST AND THEN
CUT THE PARTS BETWEEN.
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