2014-2015 Полный каталог инструмента Mitsubishi (Митсубиси) EN

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           THREADING

           THREADING METHODS                                                                                                 Left Hand Thread

                                             Right Hand Thread                                                                                  Holder Reversed

                                                                               Holder Reversed
           EXTERNAL

           INTERNAL

           INSERT TYPES

THREADING                           Partial Form                                             Full Form               Semi-Full Form (Trapezoidal threads only)
                                                                                                                     a No deburring needed after threading.
           a The same insert can be used for a range of pitches.       a No deburring needed after threading.        a Requires different threading inserts.
           a Shorter tool life because the nose radius of the         a Requires different threading inserts.       a Finishing with another operation is necessary.

              insert is smaller than that of the full form insert.                                                                               Crest Radius
           a Finishing with another operation is necessary.                                                          (Additional turning necessary to finish the thread crest.)

                                       Crest Radius                                                   Crest Radius                                         Finished Surface
           (Additional turning necessary to finish the thread crest.)                 (Wiped/finished surface.)

                                                  Finished                                       Finished
                                                  Surface                                        Surface

           Pre-finished Surface                                        Pre-finished Surface       Finishing                  Pre-finished
                        Feed Direction                                                           allowance                        Surface

                                                       Insert          Feed Direction                Insert                   Feed Direction    Insert

           INFEED METHODS

                                    Radial Infeed                      Flank Infeed                                                     1° 5°  Incremental Infeed

                                                                                                             Modified Flank Infeed

                                    a	Easiest to use.              a	Relatively easy to use.         a	Preventing flank wear on the a	Uniform flank wear of the 

                     Advantages     	 (Standard programme for 	 (Semi-standard programme             	 right side of the cutting edge. 	 right and left sides of the

                                    	 threading)                   	 for threading.)                 a	Reduced cutting force.                   	 cutting edge.

                                    a	Wide application. (Cutting a	Reduced cutting force.            a	Suitable for large pitch                 a	Reduced cutting force.

                                    	 conditions easy to change.) a	Suitable for large pitch         	 threads or materials that                a	Suitable for large pitch

                                    a	Uniform wear of the right and 	 threads or materials that      	 peel easily.                             	 threads or materials that

           Features                 	 left sides of the cutting edge. 	 peel easily.                 a	Good chip discharge.                     	 peel easily.

                                                                   a	Good chip discharge.

                     Disadvantages  a	Difficult chip control.      a	Large flank wear on the right   a	Complex machining                        a	Complex machining
                                    a	Subject to vibration in the  	 side of the cutting edge.       	 programming.                             	 programming.
                                    	 later in stages of cutting.  a	Relatively difficult to change
                                    a	Ineffective for large pitch  	 cutting depth.                  a	Difficult to change cutting              a	Difficult to change cutting
                                    	 threading.                   	 (Re-programming                 	 depth. (Re-programming                   	 depth. (Re-programming
                                    a	Heavy load on the nose                                         	 necessary)                               	 necessary)
                                    	 radius.                      	 necessary)
                                                                                                                                                a	Difficult chip control.

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