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ASME B5.50-2009 pdf download

ASME B5.50-2009 pdf download.7/24 Taper Tool to Spindle Connection for Automatic Tool Change.
1.5 References 1.5.1 The following is a list of publications refer- enced in this Standard. ASME B5.18-1972, Spindle Noses and Tool Shanks for Milling Machines ASME B5.40-1977, Spindle Noses and Tool Shanks for Horizontal Boring Machines ASME Y14.5-2009, Dimensioning and Tolerancing Publisher: The American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990; Order Department: 22 Law Drive, Box 2300, Fairfield, NJ 07007-2300 (www.asme.org) ISO 1940-1:2003, Mechanical vibration — Balance qual- ity requirements for rotors in a constant(rigid) state — Part 1: Specification and verification of balance tolerances ISO 1940-2:1997, Mechanical vibration — Balance qual- ity requirements of rigid rotors — Part 2: Balance errors ISO 1947:1973 (withdrawn), System of cone tolerances for conical workpieces from C p 1:3 to 1:500 and lengths from 6 to 630 mm ISO 7388-1:2007, Tool shanks with 7/24 taper for auto- matic tool changers — Part 1: Dimensions and desig- nation of shanks of forms A, AD, AF, U, UD and UFISO 7388-2:2007, Tool shanks with 7/24 taper for auto- matic tool changers — Part 2: Dimensions and desig- nation of shanks of forms J, JD and JF Publisher: International Organization for Standardization (ISO), 1 ch. de la Voie-Creuse, postale 56, CH-1211 Gene` ve 20, Switzerland/Suisse (www.iso.org). Copies of ISO documents may be obtained from the American National Standards Institute (ANSI), 25 West 43rd Street, New York, NY 10036 (www.ansi.org). 1.5.2 The following documents are not referenced in this Standard but are relevant to the subject and may be of interest to the user of this Standard. ASME B5.10-1994, Machine Tapers (Self Holding and Steep Taper Series) ISO 9270:1992, 7/24 tapers for tool shanks for automatic changing — Tapers for spindle noses 2 ESSENTIAL DIMENSIONS FOR 7/24 TAPER TOOLHOLDER SHANK See Table 1. 3 ESSENTIAL DIMENSIONS FOR RETENTION KNOBS See Table 2. 4 ESSENTIAL DIMENSIONS FOR 7/24 TAPER SPINDLE SOCKETS 4.1 Dimensions See Table 3. 4.2 Optional Face-Mount Holes See Table 3 and Fig. 1.
A-1 GENERAL This Nonmandatory Appendix is intended to provide informative content pertaining to the use of the 7/24 taper spindle-to-toolholder connection. These are gen- eral recommendations which if followed should max- imize performance and minimize maintenance difficulties. Nominal operational values for 7/24 taper toolholder shanks are shown in Table A-1. All of this content is derived from decades of practical experience with the subject toolholder interface in aerospace, auto- motive, and general machine shop practice. Items to consider when specifying either the toolholder or spin- dle side of the interface are (a) age, condition, and service requirements of the machine tool (b) the ability to either maintain toolholder interface integrity or repair and replace worn-out equipment (c) updated training for machinists and programmers (d) the knowledge of your machine tool supplier on the subjects of machining dynamics, allowable machin- ing forces, and maintenance of drawbar mechanisms (e) the degree to which a given spindle taper can be reground without exceeding the depth of the hard- ened case The cone tolerance system as historically described by ISO 1947 is presented to the extent that it pertains to this Standard (see Nonmandatory Appendix B). A-2 DRAWBAR FORCES 7/24 taper tool to spindle connections require suffi- cient force pulling on the retention knob to achieve the following operational characteristics. These characteris- tics are directly affected by the amount of pulling force and, because of this, performance characteristics of the toolholder-to-spindle connection will change if drawbar force changes. At tool change, the drawbar pull force elastically deforms the mating tapers until enough sur- face area contact is made to distribute point contact forces and seat the taper. The performance characteris- tics affected by drawbar pull force are (a) positional accuracy and stability of the machine tool (b) resistance to torque-induced slippage at the toolholder–spindle interface

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