Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA

Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA

Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA _ THREADING METHODS THREADING METHODS 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 comer radius of the insert is smaller than that of the full form insert. Finishing with another operation is necessary. 9 No deburring needed after threading. 9 Requires different threading inserts. 9 No deburring needed after threading. 9 Requires different threading inserts. 9 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 Pre-finished Surface f owance Feed Direction Crest Radius (Additional turning necessary to finish the thread crest.) FinishedSurface InichoH Pre-finished Surface Feed Direction INFEED METHODS iHv ifh\ A t Radial Infeed \ Flank Infeed 1-a Modified Flank Infeed t t Incremental Infeed Features Advantages Easiest to use. (Standard programme for threading) 9 Wide application. (Cutting conditions easy to change.) Uniform wear of the right and left sides of the cutting edge. 9 Relatively easy to use. (Semi-standard program for threading.) 9 Reduced cutting force. 9 Suitable for large pitch threads or materials that peel easily. 9 Good chip discharge. 9 Preventing flank wear on the right side of the cutting edge. 9 Reduced cutting force. 9 Suitable for large pitch threads or materials that peel easily. 9 Good chip discharge. 9 Uniform flank wear of the right and left sides of the cutting edge. 9 Reduced cutting force. 9 Suitable for large pitch threads or materials that peel easily. Disadvantages 9 Difficult chip control. 9 Subject to vibration in the later in stages of cutting. 9 Ineffective for large pitch threading. Heavy load on the corner radius. 9 Large flank wear on the right side of the cutting edge. 9 Relatively difficult to change cutting depth. (Re-programming necessary) 9 Complex machining programming. 9 Difficult to change cutting depth. (Re-programming necessary) 9 Complex machining programming. 9 Difficult to change cutting depth. (Re-programming necessary) 9 Difficult chip control. Mitsubishi Materials 1983 TECHNICAL DATA