1、AN AM E R IC AN NAT IO NAL STANDARDASME B5.50-2015(Revision of ASME B5.50-2009)7/24 Taper Tool to Spindle Connection for Automatic Tool ChangeASME B5.50-2015(Revision of ASME B5.50-2009)7/24 Taper Tool toSpindle Connectionfor Automatic ToolChangeAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,
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11、 system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2015 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespon
12、dence With the B5 Committee.vi1General.12Essential Dimensions for 7/24 Taper Toolholder Shank.23Essential Dimensions for Retention Knobs.24Essential Dimensions for 7/24 Taper Spindle Sockets.2Figure1Optional Face-Mount Holes,7/24 Taper Spindle Socket.2Tables1Essential Dimensions of Basic Toolholder
13、Shanks for Machining Centers WithAutomatic Tool Changers.32Essential Dimensions of Retention Knobs.53Essential Dimensions of 7/24 Taper Spindle Socket.7Nonmandatory AppendicesAUseful Technical Information.9BExcerpt From ISO 1947:1973,System of Cone Tolerances for Conical WorkpiecesFrom C p 1:3 to 1:
14、500 and Lengths From 6 to 630 mm.11iiiFOREWORDThe Aerospace Industries Association(AIA)developed,in cooperation with machine toolbuilders and users,standards of toolholder shanks and retention knobs for machining centerswith automatic tool changers.AIA/NAS 970 was first published in 1964.The objecti
15、ve of thisstandardizationeffortwastoreducethelargenumberofalreadyexistingtoolshankconfigurationsand to prevent the creation of new ones.The toolholder shanks made by different machine toolbuilders varied in the methods and in dimensional details of the gripping by the transfer mecha-nism and retenti
16、on in the machine tool spindle.The resulting lack of interchangeability createdproblems of maintaining large toolholder inventories.The AIA standard covered a series ofstraight and tapered shank toolholders,but the standard never found wide acceptance;onereason for this was that standardization attempted too“early in the art”stifled innovation anddevelopment of better tool shanks for machining centers.During the intervening years,almost every machine tool builder continued to develop its own,oft
