1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2005 SAE InternationalAll rights reserved. No part of this publication may be
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4、-776-0790Email: custsvcsae.orgSAE WEB ADDRESS: http:/www.sae.orgAEROSPACE RECOMMENDED PRACTICEARP680REV.CIssued 1960-11Revised 1997-12Reaffirmed 2005-10Superseding ARP680BUniversal Turnover Build-Up Stand Seriesfor Propulsion Units and/or ComponentsFOREWORDChanges in this revision are format/editori
5、al only.1. SCOPE:This recommended practice covers a series of stands that may be used for assembly, disassembly and maintenance; incorporating the following design criteria: a collapsible frame construction, envelope dimensions, attachment shear pad configuration and gear box and caster specificatio
6、ns.1.1 Purpose:To provide a recommended practice for the design of a series of build-up stands which will be adaptable to small propulsion units (excluding those units requiring special assembly) and/or all propulsion unit components for the specified classes.2. REFERENCES:The following Military Spe
7、cifications may be applicable and provide useful information:2.1 U.S. Government Publications:Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.MIL-S-8512 Support Equipment, Aeronautical, Special, General Specification For The Design OfMI
8、L-D-1000 Drawings and Data Lists; Preparation of, For Special Support EquipmentMIL-C-4751 (USAF) Casters, Rigid and Swivel, Precision, Heavy Duty, Shock AbsorbingMIL-C-7474 (USAF) Casters, IndustrialMIL-M-8090 Mobility Requirements, Ground Support Equipment, General Specification ForSAE values your
9、input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/ARP680C SAE ARP680 Revision C- 2 -2.2 SAE Publications:Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.ARP863 Universal Turnover Build-Up Stand for Small Propulsion Units Req
10、uiring Vertical Assembly3. DETAIL REQUIREMENTS:3.1 Design configuration shall be of a collapsible concept consisting of two (2) “A” frame assemblies and two (2) or more interchangeable connecting members.3.1.1 Stand Assembly:3.1.1.1 The stand assembly shall support a 1350 pound static load equally d
11、istributed through the attachment shear pads. Design stress shall be one third the yield stress or one fourth the ultimate stress if no yield stress is given.3.1.1.2 The stand assembly shall withstand static proof loads of 200 percent without failure or permanent deformation.3.1.1.3 The stand assemb
12、ly shall be designed to provide a minimum floor clearance of 5.000 inches. Exception: 4.000 inch minimum floor clearance within a 12.000 inch radius from center (swivel point) of caster. See Figure 1.3.1.2 “A” Frames:3.1.2.1 The “A” frame assemblies shall be of two (2) designs as follows:One (1) fra
13、me assembly shall consist of an “A” type structure, a gear box, an attachment shear pad, connecting member attaching flanges and two (2) casters.The second frame assembly shall consist of an “A” type structure, a pillow block, an attachment shear pad, connecting member attaching flanges and two (2)
14、casters.3.1.2.2 All physical dimensions of the “A” frame assemblies shall be such that they will clear all envelope dimensions called out in Figure 1 for all stand classes.3.1.3 Attachment Shear Pads:3.1.3.1 The attachment shear pads shall be of two (2) designs as follows:One (1) shear pad is to be
15、rotating, non-adjustable and attached to a gear box.The second shear pad is to be rotating, adjustable (1.000 inch minimum axial travel for loading components) and supported in a pillow block.SAE ARP680 Revision C- 3 -3.1.3.2 The attachment shear pads shall be designed such that the pilot diameters,
16、 pilot lengths, flange diameters, hole sizes and hole locations will conform to dimensions shown on Figure 1.3.1.4 Casters:3.1.4.1 Casters shall be shock absorbing, full swivel with four (4) position lock and equipped with an integral foot operated tread contact brake that must be effective through
17、the full range of deflection of the caster and capable of rendering the stand completely immobilized with lock readily accessible. Wheel shall be 6 inch minimum diameter, single, 1-1/2 inches minimum tread width and non-sparking. The rated load for each caster shall be 338 pounds plus one fourth the
18、 weight of the stand.3.1.5 Gear Box and Associated Hardware:3.1.5.1 The gear box shall have a minimum ratio of 60 to 1, have non-locking gear set(s) and be capable of resisting a minimum torque of 2200 pound inches when applied at the output shaft without shaft rotation.3.1.5.2 The gear box or assoc
19、iated hardware shall be equipped with a retractable mechanical safety locking feature that is spring loaded to the safety position.3.1.6 Pillow Block:3.1.6.1 The pillow block shall be equipped with self-aligning, double roller bearings.3.1.7 Connecting Members:3.1.7.1 Interchangeable connecting memb
20、ers shall be designed to meet the specified weight requirement. The length of these members shall meet all envelope dimensions called out in Figure 1.3.1.7.2 The attaching ends of the connecting members shall be controlled dimensionally to allow for interchangeability between all stand classes of th
21、e same manufacture.3.1.7.3 Connecting member attachment hardware shall not invade envelope dimensions shown in Figure 1.3.1.7.4 The connecting members shall have a 2.875 .010 diameter in center of stand for distance of B minimum as called out in Figure 1.3.1.8 Adapters, Cradles, Stabilizers, Etc.:3.
22、1.8.1 All adapters, cradles, stabilizers, drip pans, etc. shall be designed separately to adapt various units and/or components to the stand classes. Consideration should be given to positioning the center of gravity of each unit or component during its assembly or disassembly to prevent overload to
23、 gear box. See paragraph 3.1.5.1.SAE ARP680 Revision C- 4 -3.1.8.2 All adapters, cradles, stabilizers, drip pans and attachment hardware shall be mounted so as not to invade shear pads and stand envelope dimensions. See Figure 1.3.2 Inspection:3.2.1 Alignment: The rotational axis of the gear box and
24、 the pillow block shear pad pilots shall lie in a common axis within .015 inches.PREPARED BY SAE COMMITTEE EG-1, AEROSPACEPROPULSION SYSTEMS SUPPORT EQUIPMENTTABLE 1 - Tabulated Dimensions for Figure 1ClassNo.AGageBMinBMinCMinCMinD.12E+20WeightCapacity1I 30.000 40.000 16.000 28.000 34.000 12.750 18
25、1350II 44.000 40.000 30.000 28.000 48.000 12.750 18 1350III 60.000 45.000 46.000 28.000 64.000 24.500 18 1350IV 70.000 45.000 56.000 28.000 74.000 24.500 18 1350V 44.000 40.000 30.000 28.000 48.000 12.750 28 13501Weight capacity includes combined weight of component and tooling (adapters, cradles, etc.).SAE ARP680 Revision C- 5 -FIGURE 1
