1、BRITISH STANDARD BS 4656-38: 1995 Accuracy of machine tools and methods of test Part 38: Specification for surface finish of test pieces UDC 621.9.01-187.001.4:621.793/.795BS4656-38:1995 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published unde
2、rthe authority of the Standards Board and comesintoeffect on 15 July 1995 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference MTE/1 Draft for comment 94/704506 DC ISBN 0 580 24243 9 Committees responsible for this British Standard The preparation of this
3、 British Standard was entrusted to Technical Committee MTE/1, Machine tools, upon which the following bodies were represented: Advanced Manufacturing Technology Research Institute British Engineers Cutting Tools Association Cranfield University Gauge and Tool Makers Association Health and Safety Exe
4、cutive Institution of Electrical Engineers Machine Tool Technologies Association Ministry of Defence Individual experts Amendments issued since publication Amd. No. Date CommentsBS4656-38:1995 BSI 09-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative ref
5、erences 1 3 Definitions 1 4 Application of test methods 1 Figure 1 Test piece for test P4: between centres machines 13 Figure 2 Test piece for test P4: chucking machines 13 Figure 3 Test piece for tests G18 and P5 13 Figure 16 Test piece for test P1 (see Table 11 for dimensions) 17 Figure 17 Test pi
6、ece for test P2: horizontal machines 17 Table 1 Surface texture values for machined test pieces 2 List of references Inside back coverBS4656-38:1995 ii BSI 09-1999 Foreword This Part of BS 4656 has been prepared by Technical Committee MTE/1. It is considered that, in specifying the surface texture o
7、f the test pieces called up in the practical tests of the various other Parts of the BS 4656 series, the quality and reliability of the test data is enhanced. It is intended to submit this Part of BS4656 as a proposal for incorporation into appropriate standards prepared by Technical Committee39, Ma
8、chine tools, of the International Organization for Standardization (ISO). To meet the needs of UK industry this Part of BS4656 is being prepared in advance of the potential related ISO work. This Part of BS 4656 is intended as a specification to those whose task it is to machine test pieces, recogni
9、zing that the surface texture of any specimen produced is, amongst other things, an indication as to how a machine will behave under load. The surface texture values quoted in this specification are values that should be achieved in order that the test piece itself can be reasonably expected to act
10、as a means to provide reliable data within the permitted deviations of the test in question. These values should not be regarded as a statement of the surface texture that may be obtained by the use of any particular machine tool since the ultimate surface texture produced, even with optimum machini
11、ng conditions, will be influenced by many unrelated variables. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity fr
12、om legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 26, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendm
13、ent table on the inside front cover.BS4656-38:1995 BSI 09-1999 1 1 Scope This Part of BS 4656 specifies the surface texture for the practical test pieces contained in various other Parts of BS4656and which are listed in Table 1. This Part of BS4656is applicable to Parts 1, 2, 3, 4, 5, 6, 7, 8, 9, 21
14、, 22, 23, 24, 28, 29, 30, 31, 32, 35, 36 and 37. 2 Normative references This British Standard incorporates, by reference, provisions from specific editions of other publications. These normative references are cited at the appropriate points in the text and the publications are listed on the inside
15、back cover. Subsequent amendments to, or revisions of, any of these publications apply to this British Standard only when incorporated in it by updating or revision. 3 Definitions For the purposes of this Part of BS4656, the definition of surface texture given in BS1134-1:1988 applies. 4 Application
16、 of test methods 4.1 In applying the tests detailed in this Part of BS4656, reference shall be made to the corresponding other Part of BS4656 given in Table 1. NOTE 1In Table 1, the machining symbol together with a numerical value indicates the particular surface to which the surface texture value a
17、pplies. NOTE 2The figure and table references in Table 1 are reproduced directly from the relevant Parts of BS4656. 4.2 It is emphasized that tests shall be carried out using finishing cuts only. Tools shall be maintained in a sharp condition, they shall be correctly ground, and grinding wheels shal
18、l be dressed. NOTE 1Coolants may be used to avoid overheating. NOTE 2Failure to operate under these conditions may have an adverse effect on surface texture. NOTE 3It is permissible to rough out a test piece on another machine leaving2mm on all machined surfaces and thread blanks, and0.5mm on all gr
19、ound surfaces. 4.3 Surfaces shall be checked using electrical stylus type measuring instruments. The sampling length (metre cut-off) shall be0.8mm. 4.4 A record shall be kept of the surface roughness values obtained from each test piece.BS4656-38:1995 2 BSI 09-1999 Table 1 Surface texture values for
20、 machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m a) BS 4656-1:1981 Specification for lathes, general purpose type (related to ISO 1708) P1 P2 P3BS4656-38:1995 BSI 09-1999 3 Table 1 Surface texture values for machined test pieces Item Reference
21、to BS 4656 Surface texture value, R a Part number and title Test 4m b) BS 4656-2:1988 Specification for copying lathes and copying attachments (related to ISO 8956) P1 P2 P3BS4656-38:1995 4 BSI 09-1999 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture
22、value, R a Part number and title Test 4m c) BS 4656-3:1971 Milling machines, knee and column type, horizontal vertical spindle plain (related to ISO 1701) P1BS4656-38:1995 BSI 09-1999 5 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part
23、number and title Test 4m d) BS 4656-4:1971 Milling machines, bed type, horizontal or vertical spindle (related to ISO 1984) P1 e) BS 4656-5:1979 Milling machines, knee and column type, horizontal spindle, universal (related to ISO 1701: Addendum1) See Part 3.BS4656-38:1995 6 BSI 09-1999 Table 1 Surf
24、ace texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m f) BS 4656-6:1988 Specification for surface grinding machines, vertical spindle, reciprocating table type (related to ISO 1985) P1 P2BS4656-38:1995 BSI 09-1999 7 Table 1 Sur
25、face texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m g) BS 4656-7:1988 Specification for surface grinding machines, horizontal spindle, reciprocating table type (related to ISO 1986) P1 P2BS4656-38:1995 8 BSI 09-1999 Table 1
26、Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m h) BS 4656-8:1974 Internal cylindrical grinding machines with horizontal spindle (technically equivalent to ISO 2407) 2P1 4P1 i) BS 4656-9:1974 External cylindrical grin
27、ding machines with reciprocating table (technically equivalent to ISO 2433) P1 P2BS4656-38:1995 BSI 09-1999 9 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m j) BS 4656-21:1988 Specification for boring and mil
28、ling machines, horizontal spindle table type and rotary table type (technically equivalent to ISO 3070-0, ISO 3070-1, ISO 3070-1: Addendum 1) 3P1 3P2 3P3 3P4 3P5 3P6 3P7BS4656-38:1995 10 BSI 09-1999 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture val
29、ue, R a Part number and title Test 4m j) BS 4656-21:1988 Specification for boring and milling machines, horizontal spindle table type and rotary table type (concluded) (technically equivalent to ISO 3070-0, ISO 3070-1 ISO3070-1: Addendum 1) 4P1 k) BS 4656-22:1988 Specification for vertical boring an
30、d turning lathes, single and double column types (identical with ISO 3655) P1 P2 P3BS4656-38:1995 BSI 09-1999 11 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m l) BS 4656-23:1979 Surface grinding machines wit
31、h two columns slideway grinding machines (relatedto ISO 4703) P1 P2 P3 m) BS 4656-24:1993 Specification for cylindrical external centreless grinding machines (identical with ISO 3875) P1BS4656-38:1995 12 BSI 09-1999 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Su
32、rface texture value, R a Part number and title Test 4m n) BS 4656-28:1988 Specification for numerically controlled turning machines up to and including1500 mm turning diameter P1 P2 P3BS4656-38:1995 BSI 09-1999 13 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surf
33、ace texture value, R a Part number and title Test 4m n) BS 4656-28:1988 Specification for numerically controlled turning machines up to and including 1500 mm P4 Figure 1 Test piece for test P4: between centres machines Figure 2 Test piece for test P4: chucking machines Figure 3 Test piece for tests
34、G18 and P5BS4656-38:1995 14 BSI 09-1999 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m o) BS 4656-29:1981 Specification for automatic lathes, multi-spindle (indexing drum) type P1 P2BS4656-38:1995 BSI 09-1999
35、 15 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m o) BS 4656-29:1981 Specification for automatic lathes, multi-spindle (indexing drum) type (continued) P3BS4656-38:1995 16 BSI 09-1999 Table 1 Surface texture
36、 values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m o) BS 4656-29:1981 Specification for automatic lathes, multi-spindle (indexing drum) type (concluded) P4 P5BS4656-38:1995 BSI 09-1999 17 Table 1 Surface texture values for machined tes
37、t pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m p) BS 4656-30:1992 Specification for machining centres and computer numerically controlled milling machines, horizontal and vertical spindle types P1 Figure 16 Test piece for test P1 (see Table 11 for dimensi
38、ons) P2 Figure 17 Test piece for test P2: horizontal machinesBS4656-38:1995 18 BSI 09-1999 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m p) BS 4656-30:1992 Specification for machining centres and computer nu
39、merically controlled milling machines, horizontal and vertical spindle types (continued) P2 Test piece for test P2: vertical machines P3aBS4656-38:1995 BSI 09-1999 19 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Te
40、st 4m p) BS 4656-30:1992 Specification for machining centres and computer numerically controlled milling machines, horizontal and vertical spindle types (concluded) P3b q) BS 4656-31:1982 Specification for capstan, turret and automatic lathes, single spindle type greater than 25 mm diameter capacity
41、 (related to ISO 6155-1) P1 P2 P3 NOTESurface finish values are not allocated for the screw thread test.BS4656-38:1995 20 BSI 09-1999 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m r) BS 4656-32:1983 Specific
42、ation for boring and milling machines, planer type (technically equivalent to ISO3070-0, ISO 3070-1: addendum and related to ISO3070-3) P1 P2 P3 P4 P5 P6 P7BS4656-38:1995 BSI 09-1999 21 Table 1 Surface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part
43、number and title Test 4m s) BS 4656-35:1987 Specification for capstan, turret and automatic lathes, single spindle type less than 25 mm diameter capacity (identical with ISO 6155-2) P1 P2 P3 NOTESurface finish values are not allocated for the screw thread test.BS4656-38:1995 22 BSI 09-1999 Table 1 S
44、urface texture values for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m t) BS 4656-36:1987 Specification for plano-milling machines, portal type (identical with ISO 8636-1) P1BS4656-38:1995 BSI 09-1999 23 Table 1 Surface texture values for ma
45、chined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m t) BS 4656-36:1987 Specification for plano-milling machines, portal type (identical with ISO 8636-1) (concluded) P2 Same test piece as for P1BS4656-38:1995 24 BSI 09-1999 Table 1 Surface texture val
46、ues for machined test pieces Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m u) BS 4656-37:1989 Specification for plano-milling machines, gantry type (identical with ISO 8636-2) P1BS4656-38:1995 BSI 09-1999 25 Table 1 Surface texture values for machined test pieces
47、 Item Reference to BS 4656 Surface texture value, R a Part number and title Test 4m u) BS 4656-37:1989 Specification for plano-milling machines, gantry type (identical with ISO 8636-2) (concluded) P2 Same test piece as for P126 blankBS4656-38:1995 BSI 09-1999 List of references (see clause 2) Normat
48、ive references BSI publications BRITISH STANDARDS INSTITUTION, London BS 1134, Assessment of surface texture. BS 1134-1:1988, Methods and instrumentation. BS 4656, Accuracy of machine tools and methods of test. BS 4656-1:1981, Specification for lathes, general purpose type. BS 4656-2:1988, Specifica
49、tion for copying lathes and copying attachments. BS 4656-3:1971, Milling machines, knee and column type, horizontal or vertical spindle plain. BS 4656-4:1971, Milling machines, bed type, horizontal or vertical spindle. BS 4656-5:1979, Milling machines, knee and column type, horizontal spindle, universal. BS 4656-6:1988, Specification for surface grinding machines, vertical spindle, reciprocating table type. BS 4656-7:1988, Specification for surface grinding machin
