1、) AEROSPACE SPACE RECOMMENDED 10- 15-69 Society of Automotive Engineers, inc. PRACTICE I TWO PEHhCYLVANIA PLAZA. NEW YORK. N.Y 10001 INSPECTION OF WORN INVOLUTE SPLINES 1. PURPOSE This recommended practice defines a method for measuring worn fillet rootside fit involute splines. 2. SCOPE 2.1 This
2、 concept for measuring worn splines provides a direct wear depth dimension by utilizing the un- worn involute surface as a contact point from which to measure the depth of wear on the spline tooth at the pitch diameter. Fig. 1 shows spline wear patterns and pitch diameter gaging points. 2.2 Gages en
3、compassing this concept would basically consist of fixed and movable probes which contact the unworn involute surface known as the form clearance and the worn surface at the pitch diameter thus providing a direct wear reading which is reflected on a dial indicator. Refer to paragraphs 4 and 5 and Fi
4、g. 2. 3. IKSPECTIOK HISTORY 3.1 Where gaging and limits have been provided, the inspection method has usually been similar to the manufacturing method of measurement, i. e. , between or over gaging pins. In some instances for service inspection, balls have been substituted for pins to permit inspect
5、ion at the worn areas. Y. 2 Manufacturing tolerances in most cases absorb some of the service wear limit specified since the limits are calculated from the maximum tooth space for the internal spline and the minimum tooth thickness for the external spline. 3.3 The proposed gaging concept is affected
6、 to a negligible degree by manufacturing tolerances. 4. REQUIREMENTS 4.1 Gaging provided for splines utilizing the wear measuring concept of referencing the worn involute prufile to the unworn involute profile area (C form clearance) shall be capable of providing a direct measurement between the two
7、 surfaces at the pitch diameter and such measurement shall be linear mid reflected on a suitable dial indicator. Refer to paragraph 5 and Fig. 2. F 4.2 The spline wear checking gage shall consist of three members (see Fig. 2). Members A and which contact the worn and C areas shall be approximately 1
8、/16 in. thick. Member may vary to greater lengths provided the ability to traverse the length of the splined part is retained. One mem- ber is to be stationary and two are to be moveable with respect to each other. The member A which contacts the worn profile is to be symmetrically relieved (see Fig
9、 3) above and below the pitch line to insure proper contact. The reliefs shown for members and care considered optional. The gaging member A shall consist of three spliiied teeth spaced approximately 120 deg apart and the other menibers gand by springs actuated by a suitable lever or switch. F shal
10、l have a full complement of teeth. Gaging members shall be motivated Printed in U.S.A. , -.-, Copyright 1960 by Society of Automotive Engineers, Inc. :) - - 4RP 1111 I -2- 4.3 4.4 4.5 4.6 5. 5.1 The spline wear checking gage shall have a spring loaded ability which will move the splined checking mem
11、bers A and B in the same direction and the locking member C in the relatively opposite direction to apply pre&ure on the opposite tooth profile to the tooth being checked. The two checking members are forced against the worn tooth, one member B contacting the unworn (C ) area and the other A contact
12、ing the worn surface at the pitch diameter thus providing a direct reading of spline tooth wear onthe indicator dial. F The spline wear checking gage members shall have the ability to move in either direction to obtain wear measurements on the loaded and unloaded sides of the spline. Control of dire
13、ction is to be accomplished with the gage actuating lever. Two master plug gages for internal splines and two master ring gages for external splines shall be pro- vided for setting and calibration of the corresponding spline wear checking gage. One master plug gage and one master ring gage shall inc
14、orporate a known step representing a calibrated wear condition. The stepped master gages and the nonstepped master gages shall be used during quality control calibration for checking gage accuracy. The non-stepped master gages shall be used to set gages for zero readings at bench inspection. Both pl
15、ug and both ring masters must be reversible to facilitate checking of spline gage accuracy and setting for zero readings under loaded conditions in both directions. Both internal and external spline wear checking gages shall. embody the same principles as described unde paragraph 4 requirements. 3IE
16、THODS A check far determining accuracy of the spline wear gages, either external or internal. shall be made by utilizing the proper master gages in accordance with paragraph 5.1.1. 5.1.1 Pre-set the spline wear checking gage to a neutral position. Mate the gage with the corresponding plug or ring (n
17、on-stepped) master. Actuate the spline gage wear measuring members tc make physical con- tact in the desired direction. With the master spline tooth surfaces under loaded condition. set the dial indicator to reflect a zero reading. Reset the gage to the neutral position and remove the (non-stepped)
18、master. Mate the gage with the Corresponding (stepped) master ensuring that the step is on the correct side and re-actuate the gaging members to make physical contact in the same direction. Under the loaded condition a “hands off“ reading shall reflect the calibrated step dimension and will qualify
19、the gage as satisfactory for inspection use. 5.2 Inspection of worn splined parts, either external or internal shall be made by utilizing the spline wear checking gage and the corresponding (non-stepped) master gage in accordance with paragraph 5.2.1. 5-2.1 Pre-set the spline wear checkirg gage to a
20、 neutral position. Mate the gage with the corresponding plug or ring (non-stepped) master. Actuate the spline gage wear measuring members to make physical con- tact in the desired direction. With the master spline tooth surfaces under loaded condition, set the dial indicator to reflect a zero readin
21、g. Reset the gage to the neutral position and remove the (non-stepped) master. Mate the gage with the worn splined part ensuring that the worn spline step is in the same rela- tive loading direction used for zeroing the gage. Actuate the spline wear gage measuring members in the desired direction to
22、 make physical contact with the part spline teeth. Under the loaded condition a “hand: off“ reading will reflect the actual depth of the worn step along the pitch diameter circle. Return the gage to neutral position and recheck the wosn spline in several positions along its full length to determine the maximum wear condition. PREPARED BY SAE COMMITTEE EG-1, DESIGN AND GENERAL STANDARDS FOR I AEROSPACE PROPULSION SYSTEMS -3- ARP 1111 n Z Q W -I a m W U z Q rY z I 0 i z_ w 0 6 13 J n v) I ru W 1 -5- IARP 1111 c c !5 Q O I- o 6 ( . .
