1、Designation:F1612Standard 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 originaladoption or,in the case of revision,the
2、year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover procedures for measuring thediameter or thickness of round and flat wire(ribbon)0.060 in.(1.
3、52 mm)maximum used in electronic devices and lamps.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport
4、to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Summary of Test Method2.1 In order to provide relia
5、ble determinations of physicaldimensions of wire and ribbon products,these test methods aredesigned to mechanically measure the diameter or thicknesswith a high degree of precision.These test methods are basedon the use of a sensitive measuring head with calibratedpressure settings,shaped measuring
6、anvils to reduce errorscaused by material curvature or waviness,and a method forpresetting the anvil spacing by means of gage blocks orcylindrical master standards.3.Significance and Use3.1 The methods contained in this standard are intendedprimarily for referee use,for laboratory measuring,and forc
7、ertifying size of standard samples used for checking othermeasuring equipment that may be agreed upon between thesupplier and the purchaser.4.Apparatus4.1 Either of two general types of apparatus may be used formeasuring,depending on the accuracy desired and on theavailability of certified cylindric
8、al master standards for gagesetting,as follows:4.1.1 Apparatus A For use with cylindrical master stan-dards for gage setting.4.1.2 Apparatus B For use with gage block standards forgage setting.4.2 Apparatus A,shown in Fig.1,shall have the followingfeatures:4.2.1 An adjustable anvil of the size and s
9、hape specified forthe material to be inspected.The anvil shall be nonrotating andshall be adjustable for position by means of a micrometer orprecision adjusting screw,with means for locking the anvil inany set position after adjustments have been made.4.2.2 A sensing anvil of the size and shape spec
10、ified for thematerial to be measured,linked directly to a sensing andindicating device of specified precision and sensitivity.4.2.3 The adjustable fixed anvil and sensing anvil and thesensing device shall be rigidly mounted with both anvils inalignment on the same axis.The sensing anvil shall be mov
11、ablewith provisions for retracting the anvil for placing the speci-men in the measuring position.4.2.4 Both anvils shall be properly fitted,lapped,andpolished so the contacting surfaces are flat and parallel withinthe accuracy specified.4.2.5 The sensing device shall be provided with a means forsett
12、ing the indicator hand or scale to zero,and a calibratedscale or dial for setting the sensing anvil measuring pressure tothe specified value required for measuring.This setting shall beaccurate to within6 10%of the set value.4.3 Apparatus B,shown in Fig.2,shall meet the require-ments specified for A
13、pparatus A in 4.2 with the followingadditional features:4.3.1 The fixed anvil and support to which it is attachedshall be free to move along the measuring axis but shall be heldin line with the sensing anvil by means of cantilever springs so1These test methods are under the jurisdiction of ASTM Comm
14、ittee F01 onElectronics and are the direct responsibility of Subcommittee F01.03 on MetallicMaterials.Current edition approved Feb.1,2012.Published March 2012.Originallypublished in 1961 as F16 61 T.Last previous edition approved in 2006 asF16 67(2006).DOI:10.1520/F0016-12.Copyright ASTM Internation
15、al,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 that parallelism with the sensing anvil is maintained.Theopposite end of the movable anvil support shall terminate in aball contact having a diameter from 0.19 to 0.25 in.(4.8 to 6.4mm).The total pressure of the supp
16、ort and springs shall exerta force of 500 6 10 g on the gage block.4.3.2 The gage block for setting shall be located directly incontact with the movable anvil support ball contact.Theopposite side of the gage block shall be supported at threeplaces by hardened steel balls 0.09 to 0.12 in.(2.4 to 3.2 mm)in diameter and equilaterally spaced to form a triangle.4.3.3 The three ball contacts shall be securely fixed to asupport table and shall be movable for setting the measuringdevice by means of a p
