1、December 2006DEUTSCHE NORM English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 01.100.20; 25.020!$
2、J:F“1392335www.din.deDDIN 509Technical drawings Undercuts Types and dimensionsTechnische Zeichnungen Freistiche Formen, MaeSupersedesDIN 509:1998-06www.beuth.deIn case of doubt, the German-language original should be consulted as the authoritative text.Translation by DIN-Sprachendienst.Document comp
3、rises 11 pagesDIN 509:2006-12 2 Foreword This standard has been prepared by the Normenausschuss Technische Grundlagen (NATG) (Fundamental Technical Standards Committee), Section 6 “Technical Product Documentation”, Technical Committee NA 152-06-05-AA “Technical Drawing”, with the cooperation of expe
4、rts from the Normenausschuss Maschinenbau (NAM) and Normenausschuss Werkzeuge und Spannzeuge (FWS) (Mechanical Engineering, and Tools and Clamping Devices Standards Committees, respectively). Amendments This standard differs from DIN 509:1998-06 as follows: a) The title now includes the introductory
5、 element “Technical drawings”. b) The machining allowance symbol “z” has been replaced by the symbols “z1” and “z2”. c) In Figure 4 the machining allowances indicated are now the same size. d) In Figure 5 the dimensions “g” and “f” have been deleted. e) In Figure 6 the symbol for counterbore “a/2” h
6、as been changed to “a”. f) Figures 7, 8, 9 and 10 are in a different order. g) In clause 9, example 2 has been corrected to read “Undercut E 1,2 0,2”. h) In Figures 9 and 10 (formerly 7 and 8), Details “X” and “Y”, the tolerance “ 0,1” has been added to “R1,2”. i) In Figures 9 and 10 (formerly 7 and
7、 8) the roughness data have been deleted. j) Table 1 has been rearranged. k) In Table 1 the values for radii are now preceded by an “R”. l) In Table 1 the value for dimension “f” for type G undercuts has been corrected to “0,9”. m) In Table 1 the value for dimension “f” for Undercut H 1,2 0,3 has be
8、en corrected to “2,4”. n) In Table 1 the value for dimension “t2” for Undercut F 4 0,5 is now included. o) In Table 1 the value for dimension “g” for Undercut G 0,4 0,2 has been corrected to “1,1”. p) In Table 2 dimensions “e1” and “e2” are now included in one column for type H undercuts, as they ar
9、e equally long. q) Table 2 has been rearranged. r) In Table 3 the values for dimension “a” have been divided in half and re-calculated. s) In clause 5 surface roughness specifications have been brought in line with DIN EN ISO 1302. t) In clause 6 the second example now includes the designation “MRR”
10、 (“material removal required”) in accordance with DIN EN ISO 1302. DIN 509:2006-12 3 u) Clause 9 now makes reference to the preferred type of line for drawings, as well as to the fact that the designation is to be given in conjunction with a leader line and a reference line. v) References have been
11、updated. w) The standard has been editorially revised. Previous editions DIN 509: 1956-04, 1966-01, 1966,08, 1998-06 Foreword Forms and dimensions of type G and H undercuts conform to those for indexable inserts as in DIN ISO 6987 and DIN 4969-1 (type G rhombic inserts) and as in DIN ISO 6987, DIN 4
12、968 and DIN 4969-1 (type H triangular inserts). It is economically expedient to use the above inserts to produce the undercuts specified in this standard. Although Figures 1 to 6 show undercuts for shafts and axles, the numerical values specified here also apply to bores by analogy. All radii specif
13、ied in this standard are in accordance with DIN 250. 1 Scope This standard applies to undercuts on turned parts and in bores, and helps reduce the variety of tools needed to produce such undercuts. 2 Normative references The following referenced documents are indispensable for the application of thi
14、s document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN EN ISO 1302, Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation DIN I
15、SO 128-22, Technical drawings General principles of presentation Part 22: Basic conventions and applications for leader lines and reference lines DIN ISO 128-24, Technical drawings General principles of presentation Part 24: Lines on mechanical engineering drawings DIN 509:2006-12 4 3 Terms and defi
16、nitions For the purposes of this standard the following term applies. undercut clearance groove of specified form and dimensions created by removing material at an inner corner of a rotationally symmetric workpiece and which is necessary for subsequent machining and assembly with mating parts 4 Dime
17、nsions 4.1 Type E undercuts Type E undercuts are suitable where the planar surface is not subjected to high fatigue loads and where the cylindrical surface will be subsequently machined if necessary. They are also suitable where mating parts have a relatively large counterbore or will not be in cont
18、act with the planar surface. Key d1workpiece diameter f width of undercut r radius of undercut t1depth of recess z1machining allowance Figure 1 Undercut for workpieces with cylindrical surface intended for subsequent machining DIN 509:2006-12 5 4.2 Type F undercuts Type F undercuts are to be used on
19、 workpieces with surfaces that are perpendicular to each other and will be subsequently machined, if necessary. Key d1workpiece diameter f, g width of undercut r radius of undercut t1, t2depth of recess z1, z2machining allowances Figure 2 Undercut for workpieces with planar and cylindrical surfaces
20、intended for subsequent machining 4.3 Type G undercuts Type G undercuts are to be used on workpieces which are not subjected to high fatigue loads and where a small included angle is required. Key d1workpiece diameter f, g width of undercut r radius of undercut t1, t2depth of recess z1, z2machining
21、allowances Figure 3 Undercut with small included angle DIN 509:2006-12 6 4.4 Type H undercuts Type H undercuts are to be used on workpieces with surfaces that are perpendicular to each other and will be subsequently machined if necessary (but with a greater included angle). Key d1workpiece diameter
22、f, g width of undercut r radius of undercut t1, t2depth of recess z1, z2machining allowances Figure 4 Undercut with large included angle 5 Surface roughness Ra 3,2; Rz1max 25 NOTE In practice the surface of undercuts can only be checked by visual inspection. Any other roughness parameters shall be s
23、ubject to agreement taking part function into consideration. 6 Designation The designation of undercuts shall include the following elements: the term “Undercut”; the number of this standard, “DIN 509”; a hyphen; designation of the form by the relevant letter; the undercut size (radius r and depth t
24、1separated by “”); any surface roughness parameters. EXAMPLE 1 Designation of a type E undercut having a radius, r, of 0,8 mm and a depth, t1, of 0,3 mm: Undercut DIN 509 E 0,8 0,3 EXAMPLE 2 Designation of a type E undercut having a radius, r, of 0,8 mm and a depth, t1, of 0,3 mm, material removal r
25、equired (MRR as in DIN EN ISO 1302), and with Ra 1,6 m and Rz1max 16 m: Undercut DIN 509 E 0,8 0,3 MRR Ra 1,6; Rz1max 16 DIN 509:2006-12 7 Table 1 Undercut dimensions Dimensions in mm t1t2f Corresponding diameter d1bfor workpieces ra0,1 +0,1 +0,05 +0,2 subjected to subjected to higher Type Series 1
26、Series 2 0 0 0 g normal loadscalternating loads R0,2 0,1 1 Over 1,6 up to 3 R0,4 0,2 2 Over 3 up to 18 R0,6 0,2 2 Over 10 up to 18 R0,6 0,3 2,5 Over 18 up to 80 R0,8 0,3 2,5 Over 18 up to 80 R1 0,2 2,5 Over 18 up to 50 R1 0,4 4 Over 80 R1,2 0,2 2,5 Over 18 up to 50 R1,2 0,4 4 Over 80 R1,6 0,3 4 Over
27、 50 up to 80 R2,5 0,4 5 Over 80 up to 125 E R4 0,5 7 Over 125 R0,2 0,1 0,1 1 (0,9) Over 1,6 up to 3 R0,4 0,2 0,1 2 (1,1) Over 3 up to 18 R0,6 0,2 0,1 2 (1,4) Over 10 up to 18 R0,6 0,3 0,2 2,5 (2,1) Over 18 up to 80 R0,8 0,3 0,2 2,5 (2,3) Over 18 up to 80 R1 0,2 0,1 2,5 (1,8) Over 18 up to 50 R1 0,4
28、0,3 4 (3,2) Over 80 R1,2 0,2 0,1 2,5 (2) Over 18 up to 50 R1,2 0,4 0,3 4 (3,4) Over 80 R1,6 0,3 0,2 4 (3,1) Over 50 up to 80 R2,5 0,4 0,3 5 (4,8) Over 80 up to 125 F R4 0,5 0,3 7 (6,4) Over 125 G R0,4 0,2 0,2 (0,9) (1,1) Over 3 up to 18 R0,8 0,3 0,05 (2,0) (1,1) Over 18 up to 80 H R1,2 0,3 0,05 (2,4
29、) (1,5) Over 18 up to 50 aUndercuts with series 1 radii (as in DIN 250) are to be given preference. bDoes not apply to parts with a short shoulder and thin-walled parts. When a workpiece has different diameters, it may be expedient for manufacturing reasons to use several undercuts having the same f
30、orm and size. cType G applies only to workpieces which are not subjected to high fatigue loads. DIN 509:2006-12 8 7 Machining allowances The machining allowances z1and z2specified in Table 2 offset the transition of the undercut to the machining surfaces by dimensions e1and e2, respectively, which a
31、re in turn determined by the magnitude of the allowances and the relevant sidewall angles of the undercut. Key e1, e2transition offset z1, z2machining allowances Figure 5 Machining allowances, Type F undercut Table 1 Machining allowances and dimensions e1and e2Dimensions in mm Type E Type F Type G T
32、ype H z1, z2e1e1e2e1and e2e1and e20,1 0,37 0,37 0,71 0,32 0,37 0,15 0,56 0,56 1,07 0,48 0,56 0,2 0,75 0,75 1,42 0,63 0,75 0,25 0,93 0,93 1,78 0,79 0,93 0,3 1,12 1,12 2,14 0,95 1,12 0,4 1,49 1,49 2,85 1,27 1,49 0,5 1,87 1,87 3,56 1,59 1,87 0,6 2,24 2,24 4,27 1,9 2,24 0,7 2,61 2,61 4,98 2,22 2,61 0,8
33、2,99 2,99 5,69 2,54 2,99 0,9 3,36 3,36 6,4 2,85 3,36 1,0 3,73 3,73 7,12 3,17 3,73 DIN 509:2006-12 9 8 Counterbores on mating parts Key a counterbore dimension d1workpiece diameter d2= d1+ 2a Figure 6 Counterbore on mating part Table 2 Dimension a Dimensions in mm Undercut size Minimum dimension a fo
34、r type r t1E F G H 0,2 0,1 0,2 0 0,4 0,2 0,3 0 0 0,6 0,2 0,5 0,15 0,6 0,3 0,4 0 0,8 0,3 0,6 0,05 0,35 1,0 0,2 0,9 0,45 1,0 0,4 0,7 0 1,2 0,2 1,1 0,6 1,2 0,3 0,65 1,2 0,4 0,9 0,1 1,6 0,3 1,4 0,6 2,5 0,4 2,2 1,0 4,0 0,5 3,6 2,1 9 Indications on drawings Undercuts shown in technical drawings shall pref
35、erably be drawn using a continuous wide line, type 01.2 as in DIN ISO 128-24. Designations shall be given in conjunction with a leader line and reference line as in DIN ISO 128-22 (see Figures 7 and 8). Figures 9 and 10 show how to present full details. DIN 509:2006-12 10 EXAMPLE 1 Undercut F 1,2 0,
36、2 EXAMPLE 2 Undercut E 1,2 0,2 Figure 7 Simplified representation of undercutF 1,2 0,2 Figure 8 Simplified representation of undercut E 1,2 0,2 Dimensions in mm Dimensions in mmNOTE Surface roughness information as in Clause 5 of this standard or as in DIN EN ISO 1302 NOTE Surface roughness informat
37、ion as in Clause 5 of this standard or as in DIN EN ISO 1302 Figure 9 Detailed representation of undercut F 1,2 0,2 Figure 10 Detailed representation of undercut E 1,2 0,2 DIN 509:2006-12 11 Bibliography DIN 250, Radii DIN 4968, Indexable hard metal inserts with rounded corners, without fixing hole DIN 4969-1, Indexable ceramic inserts with rounded corners, without fixing hole DIN ISO 6987, Indexable hard material inserts with rounded corners, with partly cylindrical fixing hole Dimensions
