1、Designation:F1667(Reapproved2006) Designation: F16 12Standard Test Methods forMeasuring Diameter or Thickness of Wire and Ribbon forElectronic Devices and Lamps1This standard is issued under the fixed designation F16; the number immediately following the designation indicates the year of originalado
2、ption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1These test methods cover procedures for measuring the diameter or thickn
3、ess of round and flat wire (ribbon) 0.060 in. (1.52mm) maximum used in electronic devices and lamps. They are intended primarily for referee use, for laboratory measuring, andfor certifying size of standard samples used for checking other measuring equipment that may be agreed upon between the suppl
4、ierand the purchaser.1.2The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.1.1 These test methods cover procedures for measuring the diameter or thickness of round and flat wire (ribbon) 0.060 in. (1.52mm) maximum used in elec
5、tronic devices and lamps.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 This standard does not purport to address all of the s
6、afety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Summary of Test Method2.1 In order to provide reliable determinations of
7、 physical dimensions of wire and ribbon products, these test methods aredesigned to measure mechanically measure the diameter or thickness with a high degree of precision. These test methods are basedon the use of a sensitive measuring head with calibrated pressure settings, shaped measuring anvils
8、to reduce errors caused bymaterial curvature or waviness, and a method for presetting the anvil spacing by means of gage blocks or cylindrical masterstandards.3. Significance and Use3.1 The methods contained in this standard are intended primarily for referee use, for laboratory measuring, and for c
9、ertifyingsize of standard samples used for checking other measuring equipment that may be agreed upon between the supplier and thepurchaser.4. Apparatus34.1 Either of two general types of apparatus may be used for measuring, depending on the accuracy desired and on theavailability of certified cylin
10、drical master standards for gage setting, as follows:3.1.14.1.1 Apparatus A For use with cylindrical master standards for gage setting.3.1.24.1.2 Apparatus B For use with gage block standards for gage setting.3.24.2 Apparatus A, shown in Fig. 1, shall have the following features:3.2.1An4.2.1 An adju
11、stable anvil of the size and shape specified for the material to be inspected. The anvil shall be nonrotatingand shall be adjustable for position by means of a micrometer or precision adjusting screw, with means for locking the anvil inany set position after adjustments have been made.3.2.2A4.2.2 A
12、sensing anvil of the size and shape specified for the material to be measured, linked directly to a sensing andindicating device of specified precision and sensitivity.3.2.3The4.2.3 The adjustable fixed anvil and sensing anvil and the sensing device shall be rigidly mounted with both anvils in1These
13、 test methods are under the jurisdiction of ASTM Committee F01 on Electronics and are the direct responsibility of Subcommittee F01.03 on Metallic Materials.Current edition approved Feb. 1, 2006.2012. Published March 2006.2012. Originally published in 1961 as F16 61 T. Last previous edition approved
14、 in 20002006 asF16 67(20006). DOI: 10.1520/F0016-67R06.10.1520/F0016-12.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately de
15、pict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1
16、9428-2959, United States.alignment on the same axis. The sensing anvil shall be movable with provisions for retracting the anvil for placing the specimenin the measuring position.34.2.4 Both anvils shall be properly fitted, lapped, and polished so the contacting surfaces are flat and parallel within
17、 theaccuracy specified.3.2.5The4.2.5 The sensing device shall be provided with a means for setting the indicator hand or scale to zero, and a calibratedscale or dial for setting the sensing anvil measuring pressure to the specified value required for measuring. This setting shall beaccurate to withi
18、n6 10 % of the set value.3.34.3 Apparatus B, shown in Fig. 2, shall meet the requirements specified for Apparatus A in 3.2 4.2 with the followingadditional features:3.3.1The4.3.1 The fixed anvil and support to which it is attached shall be free to move along the measuring axis but shall beheld in li
19、ne with the sensing anvil by means of cantilever springs so that parallelism with the sensing anvil is maintained. Theopposite end of the movable anvil support shall terminate in a ball contact having a diameter from 0.19 to 0.25 in. (4.8 to 6.4 mm).The total pressure of the support and springs shal
20、l exert a force of 500 6 10 g on the gage block.3.3.2The gage block for setting shall be located directly in contact with the movable anvil support ball contact. The oppositeside of the gage block shall be supported at three places by hardened steel balls 0.09 to 0.12 in. (2.4 to 3.2 mm) in diameter
21、 andequilaterally spaced to form a triangle.3.3.3The three ball contacts shall be securely fixed to a support table and shall be movable for setting the measuring device bymeans of a precision adjusting screw. Provision shall be made for securely locking the table in place after setting.FIG. 1 Measu
22、ring Apparatus A for Use with Cylindrical MasterStandards for Gage SettingFIG. 2 Measuring Apparatus B for Use with Gage BlockStandards for Gage SettingF161224.Test Specimens4.1Test specimens shall be selected at least 3 ft (0.9 m) from the end of a spool or coil of material and shall be straight an
23、d freefrom kinks, dents, or other damage that would interfere with measuring accuracy.4.2Wire or fine ribbon shall be drawn from the spool under uniformly low tension to prevent elongation. If the material isobviously contaminated with oil, dirt, or other foreign matter, it shall be drawn gently thr
24、ough a lint-free cloth, wet with a suitablesolvent.4.3.2 The gage block for setting shall be located directly in contact with the movable anvil support ball contact. The oppositeside of the gage block shall be supported at three places by hardened steel balls 0.09 to 0.12 in. (2.4 to 3.2 mm) in diam
25、eter andequilaterally spaced to form a triangle.4.3.3 The three ball contacts shall be securely fixed to a support table and shall be movable for setting the measuring deviceby means of a precision adjusting screw. Provision shall be made for securely locking the table in place after setting.5. Test
26、 Specimens5.1 Test specimens shall be selected at least 3 ft (0.9 m) from the end of a spool or coil of material and shall be straight andfree from kinks, dents, or other damage that would interfere with measuring accuracy.5.2 Wire or fine ribbon shall be drawn from the spool under uniformly low ten
27、sion to prevent elongation. If the material isobviously contaminated with oil, dirt, or other foreign matter, it shall be drawn gently through a lint-free cloth, wet with a suitablesolvent.6. Test Conditions5.16.1 The measuring device shall be used in a location that is clean and free of dust and li
28、nt. Vibration, drafts, direct heat fromlamps, and temperature variations shall be minimized. The equipment shall be kept clean and covered when not in use.5.2For6.2 For fine wire, smaller than 0.0008 in. (0.02 mm) in diameter, extra precautions shall be taken to avoid all possiblecauses (see 5.16.1)
29、 of inaccurate measurements. The measuring devices shall be used in a small gage laboratory with temperaturevariations kept to within6 5C. The equipment shall be laid out on a clean surface with tools and gage blocks on foam rubber pads.All equipment used for measuring, and the material samples, sha
30、ll be stabilized by leaving them together in the gage room for atleast 1 h. Gage blocks shall be handled with tongs to prevent temperature variations.5.3Gage6.3 Gage blocks shall be recalibrated at least once every year, using the block calibration size for the calibration setting.Blocks must be car
31、efully cleaned and handled to prevent uneven wear with consequent introduction of errors into the gage setting.5.4The6.4 The device shall be cleaned, calibrated, and set for measuring by means of certified gage blocks or cylindrical masterstandards as specified in Section 1011.6.7. Setting Measuring
32、 Apparatus6.1Set7.1 Set the measuring apparatus by means of standards so that the indicator hand or scale of the sensing device is at zerowhen adjusted for the nominal size of the material to be measured. This shall be done by means of certified cylindrical masterstandards for Apparatus A and by mea
33、ns of certified gage blocks for Apparatus B.67.2 Cylindrical master standards shall be certified for diameter, roundness, and surface finish by a metrology laboratory. Themaster cylinders of wire shall be made of hardened steel having a Rockwell hardness of C6363 to C65, 65 HRC, and lapped toa finis
34、h of 1 in. rms or a 4-in. height (0.0001 mm).6.3Gage7.3 Gage blocks shall be certified for length, flatness, parallelism, and surface finish by a metrology laboratory. Theexact thickness of the blocks shall be reported to the nearest microinch (0.000025 mm) as measured near the center of each block.
35、The surface finish shall be equivalent to 1 in. rms or a 4-in. (0.0001-mm) height or better.6.4Set7.4 Set Apparatus A for the nominal material size to be measured by placing a cylindrical master standard between thetwo anvils and adjusting the fixed anvil adjusting screw to get a zero reading on the
36、 sensing device. Raise and lower the sensinganvil against the standard several times and readjust the screw until three consecutive zero readings are obtained.6.5Set Apparatus7.5 SetApparatus B for nominal material size to be measured by means of gage blocks. Select two blocks with a difference equa
37、lto the nominal size of the material. Use the exact length of the blocks as taken from the last certification. Place the longer blockbetween the three-ball support table and the ball end of the anvil support block, and carefully seat near the center of the block.Turn the adjusting screw until the in
38、dicator on the sensing device is on zero. Raise the ball end of the anvil support block, removethe longer gage block, and replace it with the shorter block in the same position. This in effect lowers the fixed measuring anvilfrom the first zero setting by an amount equal to the nominal size of the m
39、aterial to be measured. Leave this gage block in placewhile measurements are being made.6.6To7.6 To keep the effect of temperature variations to a minimum, handle each block with insulated tongs when placed intoposition. Both blocks may also be inserted and interchanged by means of a shifting device
40、 for moving either block into the properposition. This keeps handling to a minimum and prevents hands from contacting the blocks when changing.F161237.8. Procedure A for Measuring Fine Round Wire78.1 Measure fine round wire less than 0.0008 in. (0.0203 mm) in diameter with anvils as illustrated in F
41、ig. 3 except fixed anvilshall have a radius of 1 in. (25.4 mm). Measure fine round wire more than 0.0008 in. (0.0203 mm) and less than 0.010 in. (0.25mm) in diameter with flat parallel anvils having a diameter from 0.115 in. to 0.135 in. (2.9 to 3.4 mm). Lap both anvils flat andparallel and polish t
42、o a surface finish of 1 in. r/s or a 4-in. (0.0001-mm) height. Observe the basic requirements for measuring,including anvil pressure and overall precision of the anvils and measuring apparatus, as specified in Table 1.7.2Set8.2 Set the apparatus for measuring as specified in Section 1011. Retract th
43、e upper anvil by means of the lifting level andinsert the wire specimen between the anvils. Lower the sensing anvil against the specimen and read the deviation of the diameterfrom the nominal size directly on the indicator and scale of the sensing device. Report the wire size as the average of three
44、 separatedeterminations made on specimens from the same spool.7.3The8.3 The wire specimen may be rotated between the anvils for out-of-roundness measurements as specified in Section1011.8.9. Procedure B for Measuring Large Round Wire8.19.1 Measure round wire, which is between 0.010 and 0.060 in. (0.
45、25 and 1.5 mm) in diameter, with combination flat andcylindrical anvils as illustrated in Fig. 3. Lap the measuring surface of the sensing anvil (0.1150.115 to 0.135 in. (2.93 to 3.43 mm)diameter) and polish to a surface finish of 1 in. r/s or a 4-in. (0.0001-mm) height. The fixed anvil shall be cyl
46、indrical in shapewith a radius of approximately 0.040 in. (1.0 mm) and a length of approximately 0.4 in. (10 mm). Adjust the fixed anvil so thatthe contacting surfaces of the anvils are parallel within 0.00001 in. (0.00025 mm).8.2A9.2 A wire location guide may be used on one side of the fixed anvil
47、for locating each piece of wire in approximately thesame position between the anvils. Observe the requirements for measuring, including anvil pressure and maximum overallprecision of the anvils and measuring apparatus, as specified in Table 2.8.39.3 Set the apparatus for measuring as specified in Se
48、ction 67. Retract the sensing anvil and insert the wire specimen betweenthe anvils and against the back wire positioning guide. Lower the sensing anvil slowly against the specimen and read the deviationof the wire diameter from the nominal size on the scale and indicator of the sensing device. Repor
49、t the wire diameter as the averageof three separate determinations made on specimens from the same spool.8.4The9.4 The wire specimen may be rotated between anvils for out-of-roundness measurements as specified in Section 1011.9.10. Procedure C for Measuring Thickness of Flat Wire and Ribbon910.1 Measure flat wire and ribbon by means of the following anvils:9.1.1For10.1.1 For flat wire up to 0.060 in. (1.5 mm) in thickness use the anvils specified in 8.19.1 and illustrated in Fig. 3.9.1.2For10.1.2 For ribbon and strip materials up to 0.030 in. (0.8 mm) in thickness measur
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