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1、JIS UDC 531.717.3 JAPANESE INDUSTRIAL STANDARD Vernier, dial and digital depth gauges JIS B 7 5 1 8 - 1 9 9 3 Translated and Published by Japanese Standards Association Printed in Japan 7s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/111111100
2、1, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:36 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*75L 93 = r(33b08 05LVb7l1 b In the event of any doubt arising, the original Standard in Japanese is to be final authority. I . Copyright Japanese Standards Assoc
3、iation Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:36 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD UDC 531.717.3 J I S Vernier, dial and digital depth gauges B 75
4、18-1993 1. This Japanese Industrial Standard specifies the depth gauges of 300 mm or under in maximum measuring length, among the depth gauges for general use which measure the depth dimensions by 0.05 mm, 0.02 mm or 0.01 mm in scale interval, minimum indication amount or minimum reading value (here
5、after referred to as “depth gauges“). Scope Remarks: The standards cited in this Standard are the following: JIS B 7503 Dial gauges reading in 0.01 mm JIS B 7506 Gauge blocks JIS B 7513 Precision surface plates JIS B 7533 Dial test indicators (lever type) JIS G 4303 Stainless steel bars JIS G 4401 C
6、arbon tool steels JIS Z 8103 Glossary of terms used in instrumentation e 2. Z 8103 apply, and the rest of the terms shall be as given in the following: Definitions For the main terms used in this Standard the definitions in JIS (3) (4) depth gauge The measuring instrument capable of reading the dist
7、ance be- tween the measuring surface of main scale and the measuring surface of base by the main scale graduation and vernier graduation or dial graduation, or by the electronic digital indication, when the main scale having a measuring sur- face in parallel to the measuring surface of base slides w
8、ithin the base in right angle direction to the measuring surface of base. vernier scale subdivision, and it is obtained by dividing the (n - 1) graduations of main scale graduations into n or 2 equal parts. dial scale the travelling amount of the main scale mechanically by gears or the like. That sc
9、ale for reading the main scale graduation in further That disk scale for reading by the rotating pointer, magnifying electronics type digital indication The numerical indication being expressed by detecting the travelling amount of the main scale on the basis on the main scale and counting this by a
10、n electronics circuit. instrumental error of the depth gauge. That subtracted value of the true value from the reading 3. Names The names of the principal parts of the depth gauge shall be in accordance Fig. 1. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=I
11、HS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:36 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S BS75LB 93 m 4933608 0514673 759 m 2 B 7518-1993 Fig. 1. Names of principal parts Measuring surface Locking screw Measuring surface of main sc
12、ale Graduation of main scale of main scale Finger rest I. (a) That of having sensitive feed (b) That of pointer reading Locking screw n / Sensitive feed I is U Sensitive feed screw Sensitive feed wheel Dial graduation n Pointer U (c) That of electronics type digital indication Digital indication Dig
13、ital indication Remarks: These Figures are only for indicating the names, and are not for indicating the standards of shape and construction. 4. sist of three types of the reading by the main scale graduation and vernier scale, reading by the main scale graduation, dial scale and pointer, and readin
14、g by the electronics type digital indication, and each of them shall consist of that of with and that of without sensitive feed. Types The types for the reading mechanisms of the depth gauges shall con- Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Emplo
15、yees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:36 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 B 7518-1993 Measuring length 5. gauges shall be 150 mm, 200 mm and 300 mm. Maximum measuring lengths The maximum measuring lengths of the depth Graduatio
16、ns, minimum indicating amounts or minimum reading values 6. Performance 50 or under Over 50 to 100 or under Over 100 to 200 or under 6.1 strumental errors of the depth gauges shall be in accordance with Table 1. Instrumental errors of depth gauges The permissible values for the in- f 0.05 f 0.02 f 0
17、.06 f 0.03 f 0.07 I 0.05 I 0.02 or 0.01 Over 200 to 300 or under I f 0.08 I f 0.04 Remarks: The values of this Table shall be those of at 20C. 6.2 measuring surface of base of depth gauge shall be 0.005 mm. Flatness for measuring surface of base The flatness tolerance for the 6.3 face of base respec
18、t to the measuring surface of base of depth gauge shall be 0.005 mm. Parallelism for measuring surface of main scale in respect to measuring sur- The parallelism tolerance for measuring surface of main scale in 6.4 Perpendicularity of measuring surface of base to reference end face of main scale ere
19、nce end face of main scale of the depth gauge shall be in accordance with the following formula: The perpendicularity tolerance for the measuring surface of base to the ref- Perpendicularity tolerance = where, L is the numerical value expressing the measuring length (unit: mm). 7. Graduation 7.1 gra
20、duating methods of the verniers shall be in accordance with Table 2, and the graduation methods of the dials shall be in accordance with Table 3. Graduating methods As to the graduating methods of the depth gauges, the Copyright Japanese Standards Association Provided by IHS under license with JSALi
21、censee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:36 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*7518 93 m Y933608 051Yb75 521 m 4 B 7518-1993 Table 2. Graduating methods of verniers Unit: mm Minimum Explanatory Graduation Of I
22、Graduating method of vernier I reading value I i main scale Divide 19 mm into 20 equal parts 0.05 Fig. 2 1 Divide 39 mm into 20 equal parts 0.05 Fig. 3 Divide 49 mm into 50 equal parts 0.02 Fig. 4 Fig. 2. Divide 19 mm into Fig. 3. Divide 39 mm into 20 equal parts 20 equal parts (Example of reading:
23、13.25 mm) (Example of reading: 7.50 mm) 10 20 30 10 20 30 40 50 O246810 O 12 3 4 5 6 7 9 1 0 34mm /qmm 4 Fig. 4. Divide 49 mm into 50 equal parts (Example of reading: 14.80 mm) 10 11/1lllll1 III O 20 30 40 50 60 1/1111111l1/1111/111111111 I l(lIIIIIlI(Ill Ill II Il Il II (Il Ill Ill /Il Ill Ill jl 1
24、2 3 4 5 6 7 8 9 10 44mm 70 80 11111111111111111 0.0 2 mrn Table 3. Graduating methods of dials Unit: mm Scale interval Travelling amount of main scale Explanatory of main scale per 1 revolution of pointer Figure 1 or 5 5 0.05 Fig. 5 1 or 2 2 0.02 Fig. 6 Scale interval Copyright Japanese Standards As
25、sociation Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:36 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*75L8 93 4933608 0514b7b 4b8 H Minimum reading value 0.05 Fig. 5. Example of gradu
26、ating method of scale interval 0.05 mm Thickness of main scale graduation and vernier graduation lines 5 B 7518-1993 Fig. 6. Example of graduating method of scale interval 0.02 mm 7.2 gauges, that of vernier reading shall be in accordance with Table 4, and that of dial reading shall be in accordance
27、 with Table 5. However, for that of vernier read- ing, the difference between the maximum value and the minimum value of the thickness of each graduation line, through the main scale graduation and vernier graduation, shall be 0.03 mm or under. Graduation lines As to the thicknesses of the graduatio
28、n lines of the depth Table 4. Thickness of graduation line for those of vernier reading Unit: mm 0.08 to 0.20 Table 5. Thickness of graduation line for those of pointer reading Unit: mm Thickness of main scale graduation and dial graduation lines 0.05 0.10 to 0.30 e 8. electronics type digital indic
29、ation of the depth gauge shall be 4 mm or over. Letters of electronics type digital indication The height of letters for the 9. shall be in accordance with the following: Shapes and dimensions The shapes and dimensions of the depth gauges Copyright Japanese Standards Association Provided by IHS unde
30、r license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:36 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S BS7518 73 m 4733608 0514b77 3T4 m 6 B 7518-1993 9.1 graduation surface of vernier between the main scale graduati
31、on surface and the inclined tip end of vernier graduation surface shall be 0.3 mm or under. In the plane graduation, the main scale graduation surface and the vernier graduation surface shall be in the same plane, and its level difference shall be 0.05 mm or under, as well as the clearance between t
32、he main scale graduation and the vernier graduation shall be 0.03 mm or under (See Fig. 7). Level difference between the graduation surface of main scale and the For that of the vernier reading, the level difference Fig. 7. Level difference between the main scale graduation surface and the vernier g
33、raduation surface Vernier graduation Main scale graduation surface - Vernier graduation Main scale i graduation surfacel 0.03 mm surface 8 E or under * o -+I; Base Baso 9.2 measuring surface of the base of the depth gauge should preferably be 100 mm Dimensions of measuring surface of base The length
34、wise dimension of the (See Fig. 8). Fig. 8. Dimension of measuring surface of base A E E O O - Y 10. gauge shall be in accordance with the following: Construction and functions The construction and functions of the depth (1) The surface roughness of the measuring surfaces of the base and main scale
35、shall be 0.4 a. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:36 MDTNo reproduction or networking permitted without license from IHS -,-,- (3) (4) Item Measuring surface of main sca
36、le and measuring surface of base 11. Material SUS 420 52 of JIS G 4303 SK 2 to SK 6 of JIS G 4401 7 B 7518-1993 The main scale shall be smooth and be free from loosening in operation over entire area of working range, and be free from harmful play. The sensitive feed shall be capable of being locked
37、 securely to the main scale by the fixing device (locking screw or the like). That of electronics type digital indication, when either the main scale is travelled at a speed exceeding the permissible value, or any wrong indication is indicated due to voltage drop, shall have function to indicate cle
38、arly that its value is a wrong one. For that of electronics type digital indication, when it has function to output .the indication values as the measured data, the treatment system of its data output shall be stated in detail in the instruction manual or the like. Materials and hardnesses 11.1 The
39、materials of the principal parts of the depth gauge shall be those given in Table 6 or those equal to or superior to these in mechanical proper- ties. Materials 0 Table 6. Materials 11.2 measuring surface of base of the depth gauge shall be 550 HV or over for stainless steel and be 700 HV or over fo
40、r other materials. Hardnesses The hardnesses of the measuring surface of main scale and The measuring places shall be whichever of the measuring surface of main scale and measuring surface of base or the side surfaces of within 2 mm from the surfaces thereof. 12. the performances of the depth gauge
41、shall be given in Table 7. Measuring method of performances An example of the measuring method of 0 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:36 MDTNo reproduction or networking
42、 permitted without license from IHS -,-,- JIS B*7518 93 m 4933608 0514b79 177 m 8 B 7518-1993 Table 7. Measuring method of performances of depth gauge (Example) Item Instrumenta error Flatness of measuring surface of base Parallelism of measuring surface of base in respect to measuring surface of ma
43、in scale Perpendic- ularity of measuring surface of base to reference end face of main scab Measuring method Under the condition where the measuring surface of base has been allowed to contact closely to two pieces of block gauges equal in nominal size or to the measuring surfaces of gauges equal to
44、 or superior to these which have been placed on a precision surface plate, obtain the instrumental error by subtracting the dimension of gauge from the reading of the depth gauge, when the measur- ing surface of main scale has been applied to the precision surface plate. Preliminarily adjust so that
45、 the measuring surface of base and measuring surface of main scale come on the same plane approximately, attach it to the measuring device after has been fixed with the locking screw, carry out inclination adjustment so that the readings of dial gauge or lever type dial gauge applied to the both end
46、s of the measuring surface of base become equal, then measure by travelling the dial gauge or lever type dial gauge in the left and right on the measuring surface of base, and obtain the differ- ence between the maximum value and the minimum value acquired. In succession to the measure- ment of No.
47、2, apply the measuring pointer of dial gauge or lever type dial gauge to the measuring surface of main scale, measure by travelling in the left and right, and obtain the difference between the maximum value and the minimum value acquired. Attach the main scale to the measuring device so that it beco
48、mes vertical to the precision surface plate, measure by travelling the measuring pointer of lever type dial gauge on the measuring surface of base in parallel direction to the graduation surface of main scale, and obtain the difference between the maximum value and the minimum value acquired. Diagram Block gauges Frecision surface plate liai gauge or lever type dial gauge / Clamp O f Mounting table of inclination depth gauge of i / / adjustment measuring device of measuring