1、 Reference numberISO/TR 16806:2003(E)ISO 2003TECHNICAL REPORT ISO/TR16806First edition2003-02-15Pneumatic fluid power Cylinders Load capacity of pneumatic slides and their presentation method Transmissions pneumatiques Vrins Capacit de charge des units de guidage pneumatique et leur mthode de prsent
2、ation Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TR 16806:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensin
3、g policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Ce
4、ntral Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been t
5、aken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduc
6、ed or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749
7、01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2003 All rights reservedCopyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-
8、,-ISO/TR 16806:2003(E) ISO 2003 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Rating factors 2 4.1 Pressure containing capability 2 4.2 Maximum axial load 2 4.3 Maximum combined loading for a tool plate, and its defl
9、ections 2 5 Presentation of ratings. 3 5.1 Sketch of loading on tool plate 3 5.2 Tabulations 4 5.3 Graph 5 5.4 Calculation formulas. 5 5.5 Nominal ratings . 6 6 Identification statement (Reference to this Technical Report). 6 Annex A (informative) Development of rating equations . 7 Copyright Intern
10、ational Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TR 16806:2003(E) iv ISO 2003 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide feder
11、ation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that commit
12、tee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordanc
13、e with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires a
14、pproval by at least 75 % of the member bodies casting a vote. In exceptional circumstances, when a technical committee has collected data of a different kind from that which is normally published as an International Standard (“state of the art”, for example), it may decide by a simple majority vote
15、of its participating members to publish a Technical Report. A Technical Report is entirely informative in nature and does not have to be reviewed until the data it provides are considered to be no longer valid or useful. Attention is drawn to the possibility that some of the elements of this documen
16、t may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TR 16806 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 3, Cylinders. Copyright International Organization for Standardization Provided by
17、 IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TR 16806:2003(E) ISO 2003 All rights reserved vIntroduction In pneumatic fluid power systems, power is transmitted and controlled through a gas under pressure within a circuit. A pneumat
18、ic slide consists of a mounting surface for attaching a load, which is moved by an air cylinder and guided by stiff shafts to maintain alignment. There are limits to the amount of load that can be attached to a pneumatic slide, and these limits should be described as shown in this Technical Report.
19、Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproducti
20、on or networking permitted without license from IHS-,-,-TECHNICAL REPORT ISO/TR 16806:2003(E) ISO 2003 All rights reserved 1Pneumatic fluid power Cylinders Load capacity of pneumatic slides and their presentation method 1 Scope 1.1 This Technical Report describes how to calculate the loading limits
21、for a pneumatic slide based upon: external forces applied in the three principle planes of a tool plate, and applied at any point; external torque applied in the three principle planes of a tool plate; bearing limits determined by the slide manufacturer in conjunction with the bearing supplier. 1.2
22、This Technical Report also describes how to calculate tool plate deflections due to the loads. 1.3 This Technical Report describes how to present the rating information in technical documentation for application by a user. 1.4 This Technical Report assumes that all of the applied loads and torque wi
23、ll be absorbed by the guide rods and not by the piston rod. Only the axial thrust load (but not the resulting moments) will be absorbed by the piston rod. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the
24、edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5598:1985, Fluid power systems and components Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5598 and the
25、 following apply. 3.1 pneumatic slide slide mechanism containing a movable loading plate with guide rods, operated by an air cylinder 3.2 guide rod shaft, passing through a set of bearings, which controls the deflection and twist of the loading plate 3.3 loading plate plate onto which is placed a lo
26、ad to be moved Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TR 16806:2003(E) 2 ISO 2003 All rights reserved3.4 tool plate loading plate attached at the end of the
27、piston rod and guide rods 3.5 carriage plate loading plate attached in the middle of the slide, containing the guide rod bearings NOTE In this design, mounting plates are attached at both ends of the guide rods for mounting the slide, allowing the carriage to move. 3.6 housing portion of the slide c
28、ontaining the bearings, when there is no carriage plate, and used for mounting the slide 4 Rating factors 4.1 Pressure containing capability The manufacturer shall determine the maximum pressure that the pressure containing envelope is capable of sustaining if there is no load attached. 4.2 Maximum
29、axial load The manufacturer shall determine the maximum load for both push and pull directions, when the load reactions pass through the centre of the piston rod. Describe the limitations for any column buckling. 4.3 Maximum combined loading for a tool plate, and its deflections The manufacturer sha
30、ll determine the following coefficients: A = 2l1 / f B = 2l1 / f (l1+ l2) C = l2(l1+ l2)/ (2l1+ 3l2) D = (3l22+ l1l2 l12)/ (2l1+ 3l2) H = 12EI/ l2(2l1+ 3l2) W = w (l1+ l2) where l1is the distance between the two bearing centrelines on one guide rod (this may vary with stroke); if there is only one b
31、earing on a guide rod, then l1is the length of the bearing; l2is the distance from the outer edge of the tool plate to the centreline of the closest bearing (this may vary with stroke); f is the scaling factor chosen by the manufacturer to bring calculated numbers into convenient size for tabulation
32、; E is the modulus of elasticity for the guide rods; Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TR 16806:2003(E) ISO 2003 All rights reserved 3I is the plane mom
33、ent of inertia for two guide rods; I = (dG4) / 32 dGis the diameter of guide rod; w is the weight of guide rod per unit of length. 5 Presentation of ratings 5.1 Sketch of loading on tool plate See Figure 1. Key 1 inline deflections 2 parallel deflections Figure 1 Tool plate identifications Copyright
34、 International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TR 16806:2003(E) 4 ISO 2003 All rights reserved5.2 Tabulations Coefficient A Coefficient B BORE SIZE BORE SIZE STROKE STROKE Co
35、efficient C Coefficient D BORE SIZE BORE SIZE STROKE STROKE Coefficient W Coefficient H BORE SIZE BORE SIZE STROKE STROKE Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
36、ISO/TR 16806:2003(E) ISO 2003 All rights reserved 55.3 Graph See Figure 2. Figure 2 Graph 5.4 Calculation formulas 5.4.1 Maximum tool plate load capacity F 2= (Fsy + W )/B + (a)Fax + Tz/A2+ Fsz (1 + m/b) + W /B + (h)Fax + Ty/A + Tx + (n)Fsy/bB2where A, B, W are coefficients determined in 4.3 and tab
37、ulated in 5.2; a, b, h, m, n are dimensions on the tool plate as shown in Figure 1; Fax, Fsy, Fsz, Tx, Ty, Tz are the applied forces and moments as shown in Figure 1. The above formula describes the maximum combined loads that can be carried by the tool plate. If some of the loads do not exist in an
38、 application then it is possible to increase the other loads. F = f RA, the load factor presented in Figure 2 where f is the arbitrary scaling factor described in 4.3; RAis the bearing capacity which the slide manufacturer establishes, in conjunction with a bearing supplier, taking into account the
39、bearing design, materials, its life rating, and lubrication conditions. These are then reflected in Figure 2. 5.4.2 Linear deflections of the tool plate For inline deflections: = 4(C)Fsy + 2(a)Fax + 2Tz + W(D)/H Copyright International Organization for Standardization Provided by IHS under license w
40、ith ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TR 16806:2003(E) 6 ISO 2003 All rights reserved For parallel deflections: = 4(C)Fsz + 2(h)Fax + 2Ty + W(D)/H where C, D, H, W are coefficients determined in 4.3 and tabulated in 5.2; a and h are dimensions
41、on the tool plate as shown in Figure 1; Fax, Fsy, Fsz, Ty, Tz are the applied forces and moments as shown in Figure 1. NOTE Tx is not a factor in the deflections. Deflections are in the direction as indicated in Figure 1. 5.5 Nominal ratings Show the following for the data determined in 4.1 and 4.2:
42、 MAXIMUM PRESSURE CONTAINING CAPABILITY = _ Table 1 Maximum axial force (push - pull) BORE SIZE Maximum pull force Maximum push force Stroke limit for maximum push force aaThis shall be the limit for column buckling of the piston rod, or it may be the maximum stroke offered by the manufacturer if it
43、 is less than the buckling limit. 6 Identification statement (Reference to this Technical Report) It is strongly recommended that manufacturers use the following statement in test reports, catalogs and sales literature when electing to comply with this Technical Report: “Rating of load capacities an
44、d deflections of pneumatic slides conforms to ISO/TR 16806:2003, Pneumatic fluid power Cylinders Load capacity of pneumatic slides and their presentation method.” Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networkin
45、g permitted without license from IHS-,-,-ISO/TR 16806:2003(E) ISO 2003 All rights reserved 7Annex A (informative) Development of rating equations Consider a tool plate with all possible force and torque loads applied as shown in Figure 1. These loads must be resolved into components that act on the
46、rod guide bearings in order to determine if they are within the bearing capacities. Begin with the side load forces Fsy and Fsz at their arbitrary locations and resolve these into equivalent side loads, and moments, on the principle axes (see Figure A.1). Fsy is translated to axis Y with correspondi
47、ng moment nFsy acting clockwise around the X axis. Fsz is translated to axis Z with corresponding moment mFsz acting clockwise around the X axis. Figure A.1 Now consider how all of the forces and moments act on a free body of the tool plate and its guide rods. Figures A.2 to A.4 describe the resulti
48、ng reaction loads on the bearings: Figure A.2 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TR 16806:2003(E) 8 ISO 2003 All rights reservedFigure A.3 Figure A.4 From the assumptions stated in Clause 1, forces in the X axis will be absorbed by the piston rod. Therefore, these will not be considered in the balance of forces on the tool plate and guide rods. However, there mu
