1770 Каталог MITSUBISHI 2020 Режущий инструмент Фрезы Резцы Сверла Пластины Стр.R018

Каталог MITSUBISHI 2020 Режущий инструмент для станков Стр. R018 1770 Lab2u

TECHNICAL DATA THREADING METHODS THREADING METHODS When machining left hand threads, note that clamping rigidity is lowered due the application of back turning. When machining left hand threads, the lead angle is negative. Ensure an appropriate lead angle by changing the shim. INSERT TYPES Partial form Full form Semi-full form (Trapezoidal threads only) The same insert can be used for a range of pitches. Shorter tool life because the corner radius of the insert is smaller than that of the full form insert. Finishing with another operation is necessary. No deburring needed after threading. Requires different threading inserts. No deburring needed after threading. Requires different threading inserts. Finishing with another operation is necessary, Crest Radius (Additional turning necessary to finish the thread crest.) Crest Radius (Wiped/finished surface.) Pre-finished Surface Feed Direction Crest Radius (Additional turning necessary to finish the thread crest.) Pre-finished Surface Feed Direction Feed Direction INFEED METHODS ilk IAl A IAI t Radial Infeed \ Flank Infeed Modified Flank Infeed t t Incremental Infeed Features Advantages Easiest to use. (Standard programme for threading) Wide application. (Cutting conditions easy to change.) Uniform wear of the right and left sides of the cutting edge. Relatively easy to use. (Semi-standard program for threading.) Reduced cutting force. Suitable for large pitch threads or materials that peel easily. Good chip discharge. Preventing flank wear on the right side of the cutting edge. Reduced cutting force. Suitable for large pitch threads or materials that peel easily. Good chip discharge. Uniform flank wear of the right and left sides of the cutting edge. Reduced cutting force. Suitable for large pitch threads or materials that peel easily. Disadvantages Difficult chip control. Subject to vibration in the later in stages of cutting. Ineffective for large pitch threading. Heavy load on the corner radius. Large flank wear on the right side of the cutting edge. Relatively difficult to change cutting depth. (Re-programming necessary) Complex machining programming. Difficult to change cutting depth. (Re-programming necessary) Complex machining programming. Difficult to change cutting depth. (Re-programming necessary) Difficult chip control. R018