Общий каталог Mitsubishi 2020 - 2021 - страница 1733

THREADING METHODS

THREADING DEPTH

Features Advantages Disadvantages

• Easy to use.
• Long chips generated during the

V (Standard program for threading.) final pass.

1

• Superior resistance to vibration.
• Complex calculation of cutting

(Constant cutting force.) depth when changing the number

of passes.

Fixed cut area

• Reduced load on nose radius
• Subject to vibration in the later

during the first half of the passes. stages of cutting.

(Increased cutting force) X1 Easy chip control. (Optional setting of chip thickness)

• In some cases, changing the NC
• Easy to calculate cutting depth program is necessary.

X2 when changing the number of passes. Fixed cutting depth Good chip control. * It is recommended to set the depth of cut of the final pass to 0.05 mm 0.025 mm. Large cutting depths can cause vibration, leading to a poor surface finish. y Formulas aFormulas to calculate infeed for each pass in a reduced series. Example) External threading (ISO metric) Pitch : 1.0 mm ap : 0.6 mm nap : 5 : Depth of cut

3rd pass 3–1=2

• 4th pass

nth pass 5th pass

y NC Program for Modified Flank Infeed aExample:- M12×1.0 5 passes modified 1°-3° (mm) External Threading Internal Treading

P