1、 Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630Ford Proprietary and/or Confidential Information - Do not distribute to others w/o prior written authorization. FECDS A-2 Engineering CAD the initiating release number will be shown as the last entry line in the revisi
2、on block. See Figure A2.4. Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A25 Printed copies are uncontrolled.ENGINEERING CAD for subsequent revisions, only the revision letter (i.e., “A,” not “A5”) will be entered. Figure A2.4.2 3.1.14 Revision Balloons 3.1.14.1 Re
3、vision Description entries must form a clear record of every step in a change and be readily located on the body of the drawing. As such, each change is located on the body of the drawing using a Revision Balloon containing a revision letter and its number index enclosed in a 6mm diameter circle or
4、elongated circle 6mm high for 2 characters or more. The Revision Balloons shall be placed on the drawing as close to the area of change as is practical, see Figure A-2.6. NOTE: It is permissible to add leader(s) with an arrowhead to a revision balloon to identify the area of change. 3.1.14.2 Previou
5、s Revision Balloons may be removed from the drawing as an aid to clarity when a change occurs that causes a Revision Balloon to be repositioned or when the change itself causes the Revision Balloon to have no meaning. A note will be placed in the Revision Column to identify the deletion, for example
6、: DEL REV BALLOONS A1A4. Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A28 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC 3.1.15 Revision Categories 3.1.15.1 Revisions fall into two main categories, A and B. 3.1.15.1.1 CATEGORY A
7、: Changes to or removal of existing dimensions, part numbers, etc., or where further data are added. In this case, each separate revision is identified and recorded as shown in Figure A2.5. 3.1.15.1.2 CATEGORY B: Revisions which involve notes being removed or revised, or extensive dimensional additi
8、ons and removals, not replacing each other directly. In this case, a general statement is made indicating what is being done, for example repositioned holes, redimensioned flange, etc. 3.1.15.2 It is permissible to place one Revision Balloon on the drawing to identify the general location of the num
9、erous associated changes, or to show where a note has been removed or revised. 3.1.15.3 Obviously categories A and B may occur on any drawing at the same time and the individual practices outlined for each are still valid. Figure A2.5 Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re
10、-issue: 20110630A29 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC 3.1.16 Revision Index Balloons 3.1.16.1 To facilitate the location of revisions on roll or complicated AO size drawings, Revision Index Balloons are used in conjunction with the Revision Balloons.
11、The Revision Index Balloons are placed just inside the upper border line enclosed in 6mm diameter circles or elongated circles vertically in line with each corresponding Revision Balloon. See Figure A2.6. On drawings which have been the subject of numerous changes, the previous Revision Index Balloo
12、ns, located at the top of the drawing, may be removed for clarity. NOTE: Revision Index Balloons are not required when the Zoning concept of paragraph 3.1.13.1.1 is used. Figure A2.6 Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A210 Printed copies are uncontrolled
13、.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A211 Printed copies are uncontrolled.3.1.17 Interchangeability 3.1.17.1 Revisions which affect interchangeability, either physically or functionally, normally require
14、the creation of a new part and require a new suffix, which will be advised by the design responsible engineer. The change indicator (last letter of suffix) must be revised to the next letter, and the change recorded in revision block. The responsibility for the determination of the suffix belongs to
15、 the engineer responsible for the component. Consult FAP03145 for policies regarding the determination of the prefix and suffix of the part number. 3.1.17.2 For a drawing that has a single component on it, please reference Figure A2.7 for an example of how to address: 3.1.17.2.1 A part change withou
16、t a suffix change. 3.1.17.2.2 A part change with a suffix change. NOTE: It is permissible to add in parentheses to the right of the Ford part number, the equivalent supplier part number that is being revised in the change. See Figure A-2.20 3.1.17.2.3 A Blanket/Record change. ENGINEERING CAD & DRAFT
17、ING STANDARDS Return to TOC Figure A2.7 Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A212 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC 3.1.17.3 When working with a tabulated drawing where multiple shown-on parts are released a
18、nd the Change Level Indicator of one or more of the shown-on parts suffix is revised, their previous suffix level must be noted in the revision block with the remarks “REMOVED XR2E6A286CA” and “RELEASED XR2E6A286CB” to release the new part number. See Figure A2.8. Figure A2.8 Original Issue: 1996041
19、9 Copyright, Ford Motor Company. Latest Re-issue: 20110630A213 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC 3.1.17.4 If the part number appears on an assembly drawing or in a kit, but is not released on the drawing, the revised part number should be marked with
20、a Revision Balloon and a notation such as “WAS XR1E6A251AA” placed in the revision block. See Figure A2.9. Figure A2.9 Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A214 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC 3.1.18 Recor
21、d/Blanket Changes 3.1.18.1 These are changes that revise the component to facilitate manufacturing but do not affect cost, fit or function. With these changes, the suffix of the part is not allowed to change. See Figure A2.10. 3.1.18.2 Actions not allowed with Record Changes include: 3.1.18.2.1 Any
22、change to a part number (Added/Revised/Deleted). 3.1.18.2.2 Revisions that result in piece cost, tooling, or weight variance. 3.1.18.2.3 Revisions to material or engineering specifications. Figure A2.10 3.1.19 Retrospective Revisions 3.1.19.1 Drawings will usually be revised using the standards to w
23、hich they were originally drawn. See Standard A-1, para. 3.6.2, Item V. Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A215 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC 3.1.20 Adding New Part Numbers to an Existing Drawing 3.1.2
24、0.1 If a new part number is added to an existing assembly drawing, and the part being added is detailed on a separate drawing, the new part number must be recorded in the revision block of the existing assembly drawing as being added. See Figure A2.11. Figure A2.11 3.1.20.2 If a new part number is a
25、dded to a drawing, and no separate drawing of the part being added exists, the new part number must be recorded in the revision block of the existing drawing as being released with the appropriate initial WERS release entry. See Figure A2.12. Original Issue: 19960419 Copyright, Ford Motor Company. L
26、atest Re-issue: 20110630A216 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC Figure A2.12 Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A217 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC Origin
27、al Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A218 Printed copies are uncontrolled.3.1.21 Multiple Sheet Drawings 3.1.21.1 Revision Balloons should be shown only on the affected sheet(s). All revisions are to be either recorded in the Revision Column on sheet one, or the
28、 changes are to be recorded in detail with full title blocks on the affected sheet(s). In the latter case, the “sheet one” revision block will be used as an index to record which sheets have been revised. 3.1.21.2 Sheet numbering will be indicated on the first sheet (Sheet 1) only: (i.e., Sheet 1 of
29、 50). All other sheets will only indicate their respective sheet number with no reference to the total number of sheets, employing the format: Sheet x of _ (i.e., Sheet 34 of _). 3.1.21.3 Optional Revision Practice for Multi-Sheet Drawings Where it is desired to minimize the amount of data sent via
30、electronic release systems, it is permissible to release only the sheets of a drawing that have been revised. In this case, the revision level of each sheet associated with the drawing shall be documented on sheet 1 of the drawing by using a table as shown below: RECORD OF REVISIONS SHEET 1 2 3 4 5
31、6 7 8 9 10REVISION R ABADFJKKR NOTE: Sheet 1 shall reflect the latest revision of the entire drawing For any changes, the corresponding sheet(s), Item BK in Standard A-1, shall also be updated to correspond with the chart on sheet 1. In the example chart shown above, the next revision letter to be u
32、sed is S, refer to para. 3.1.6.1, regardless of which sheet is affected by change. If Revision S affects only Sheets 2 & 4, then the chart would be updated to revision letter S for sheets 1, 2 & 4 (See Figs. A-2.12.1, A-2.12.2 & A-2.12.3 respectively). Only sheet 1 and the sheet(s) affected will be
33、sent through the release system when using this practice. The chart shall reside in the area to the left of the revision column, above the notes or other mandatory drawing information. ENGINEERING CAD & DRAFTING STANDARDS Return to TOC Figure A-2.12.1 Figure A-2.12.2 Original Issue: 19960419 Copyrig
34、ht, Ford Motor Company. Latest Re-issue: 20110630A219 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC Figure A-2.12.3 3.1.22 Similar Parts 3.1.22.1 A Similar To Drawing is a complete, stand-alone drawing of new parts which are similar to existing parts. Where possi
35、ble, similar parts should be shown on an existing drawing and a tabulated format created. See Standard B1. When a new drawing is necessary, an entry is made utilizing the following format: SIMILAR TO XR2E6010AA ISSUE DATE 19961014 WITH THE FOLLOWING DIFFERENCES 3.1.22.2 The entry is placed in the re
36、vision block for initial release only, followed by a concise reference to the location or nature of the difference, using the $ symbol in place of the revision letter. The “RELEASED” entry follows on the next line. See Figure A2.13. Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-i
37、ssue: 20110630A220 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC Figure A2.13 3.1.22.3 On simple drawings where the differences are immediately evident and space is limited, the reference to the difference may be omitted. See Figure A2.14. Figure A2.14 NOTE: When
38、 subsequent changes are made to a similar part, the original part should be examined to see if these changes are required as well, as discussed in 3.1.23, EFFECT ON OTHER DRAWINGS. Also, for subsequent releases, revisions are to be noted using the standard format of A1, B1, etc. Original Issue: 1996
39、0419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A221 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC 3.1.22.4 The use of Tabulated Drawings for new parts(s) whose design varies slightly from that or an existing part is an alternative method to using Si
40、milar Parts. Tabulating a new part, on an existing drawing, will require changes to that drawing such as additional views to describe the differences from the original part. Part Tabulation is an efficient way of maintaining commonality, such as tooling and gaging, where a separate drawing could div
41、erge from the original parts requirements. See Standard B-1, Figure B-1.1 and para. 2.1.3. 3.1.23 Effect On Other Drawings 3.1.23.1 Revisions must be considered for their effect on other drawings as well as on the drawing being revised. If the physical characteristic of the part is changed, the asse
42、mbly drawing or illustration drawing must be revised to agree with the detail. The note REVISED PICTORIALLY IN LINE WITH . . . .(give part number) must be recorded in the revision block on the assembly or illustration drawing. See Figure A2.15. Usage on other product lines must be carefully investig
43、ated before making a change. Figure A2.15 Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A222 Printed copies are uncontrolled.ENGINEERING CAD & DRAFTING STANDARDS Return to TOC Original Issue: 19960419 Copyright, Ford Motor Company. Latest Re-issue: 20110630A223 Pri
44、nted copies are uncontrolled.3.1.24 Redraws 3.1.24.1 A redrawn drawing is made to replace worn, damaged, crowded or missing originals and/or parts removed from multiple part drawings. In addition, a redraw can be made of a part undergoing revision if little or no extra work would be entailed by so d
45、oing or when it is necessary to free the revision block. 3.1.24.2 In order that the revision references shall reflect the history of the component rather than that of the drawing sheet currently in use, the revision letters on a redrawn drawing shall continue in sequence from those on the previous d
46、rawing(s), only reverting to the letter A when it would be necessary to use double letters. NOTE: When a multipart drawing is redrawn, the initial release numbers of additional parts added to the drawing should not be perpetuated, except when the last change made to the drawing includes the adding o
47、f a part. Then this release number should be contained in the revision block as shown in the revision block. 3.1.25 Practices 3.1.25.1 Redraws shall be treated as new drawings, in which re-spacing and relocating of views are permissible. All redrawn drawings shall conform to the latest version of FECDS. 3.1.25.2 When the existing original is used, all information shown in the revision block is removed except the original release information. The revision letters are continued in sequence from those on the original drawing. When a completely new drawing i
