JJF(冀) 240-2024 點線規(guī)校準(zhǔn)規(guī)范

河

北

省

地

方

計

量

技

術(shù)

規(guī)

范JJF(冀)

240—2024點線規(guī)校準(zhǔn)規(guī)范Calibration

Point-Line

Gauge2024

-

09

-

發(fā)布 2024

-

10

-

實施

發(fā)

布Calibration

Specification

For

Point-Line

Gauge

JJF(冀)

240—2024歸

口

單

河北省市場監(jiān)督管理局主要起草單位：

保定市計量測試所參加起草單位：

長城汽車股份有限公司蘇立民（保定市計量測試所）劉 劉 洋（長城汽車股份有限公司）參加起草人：張 李紅杰（保定市計量測試所）張會青（長城汽車股份有限公司）鹿 帥（長城汽車股份有限公司）姚建博（保定市計量測試所） ········································································································（

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點線規(guī)圓直徑校準(zhǔn)結(jié)果測量不確定度評定（示例）·······························（

5

）

點線規(guī)線紋間距校準(zhǔn)結(jié)果測量不確定度評定（示例）····························（

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12）

點線規(guī)校準(zhǔn)方法補充

·······································································（

13）I JJF

JJF

JJF

II 本規(guī)范適用于由線和圓組成點線規(guī)的校準(zhǔn)。 JJF

《測量儀器特性評定》。 的點、劃痕的面積、直徑、寬度、長度來確定外觀缺陷，主要用于汽車行業(yè)。PET材料制成，上刻有圓直徑、線紋間距和線紋寬度，其型式見圖圖

1 點線規(guī)示意圖 1-6MPE±(1μm

+10×10

，相對濕度不大于

表

1 表

1 校準(zhǔn)用設(shè)備及其計量性能

圖

2 圓直徑校準(zhǔn) 2 萬能工具顯微鏡調(diào)整同

b(x’,y’)

圖

3 線紋間距校準(zhǔn)

??

√(??

??′2

(??

??′2 依次校準(zhǔn)帶數(shù)字刻度的線紋間距。

端，在線紋刻線長度方向分別采集刻線兩端和中心

圖

4 線紋寬度校準(zhǔn)

，即為校準(zhǔn)結(jié)果。 使用同樣的方法依次校準(zhǔn)其它線紋寬度。

3）校準(zhǔn)單位校準(zhǔn)專用章；的校準(zhǔn)人、核驗人、批準(zhǔn)人簽名及簽發(fā)日期； 根據(jù)點線規(guī)使用情況及穩(wěn)定性，復(fù)校時間間隔由用戶自行決定，建議不超過

4測量次數(shù)12345678910測量值（mm）2.00922.00292.00512.00502.00152.00542.00812.00232.00612.0053冀)

240—2024附錄

A點線規(guī)圓直徑校準(zhǔn)結(jié)果測量不確定度評定（示例） ????

????????mm????mm ??1(??)2mm圓刻度重復(fù)測量表

A.1 重復(fù)性測量結(jié)果√3

表

A.1 重復(fù)性測量結(jié)果√3

0.6μm

(????

??1(??)

??

√∑????=1???1????)2

2.5μm

萬能工具顯微鏡最大允許誤差為±

+10×102mm=±1.02μm√3??2(??)

1.02 點線規(guī)與萬能工具顯微鏡溫度差引入的標(biāo)準(zhǔn)不確定度分量??3(??)??3(??)

0.0μm 校準(zhǔn)時溫度偏離標(biāo)準(zhǔn)溫度時，由點線規(guī)和萬能工具顯微鏡熱膨脹系數(shù)不同引??4(??)PET-6/℃??

√3???

=

(60?10.2)×10?6/℃

5不確定度分量不確定度來源標(biāo)準(zhǔn)不確定度??1(??)測量重復(fù)性2.5μm??2(??)萬能工具顯微鏡0.6μm??3(??)點線規(guī)與萬能工具顯微鏡溫度差0.0μm??4(??)偏離標(biāo)準(zhǔn)溫度時熱膨脹系數(shù)不同0.3μm????合成標(biāo)準(zhǔn)不確定度2.6μm冀)

240—2024??4(??)

???

??4(??)

???

??√3

0.3μm

(60?10.2)×10?6℃

5℃表

A.2表

A.2 標(biāo)準(zhǔn)不確定度匯總 ????

√??1(??)2

??2(??)2+??3(??)2

??4(??)2

2.6μm ??

??

????

2.6

5.2μm6測量次數(shù)12345678910測量值（mm）80.019080.013080.015480.014480.015280.015480.016980.013280.016680.0133冀)

240—2024附錄

B點線規(guī)線紋間距校準(zhǔn)結(jié)果測量不確定度評定（示例） ????

????????——被測點線規(guī)長度的測量結(jié)果，????——萬能工具顯微鏡兩點坐標(biāo)間距離， ??1(??)在重復(fù)性條件下，使用萬能工具顯微鏡對80mm線紋間距重復(fù)測量次，測量結(jié)果見表

重復(fù)性測量結(jié)果√3

表

重復(fù)性測量結(jié)果√3

1.1μm

(????

??1(??)

√∑?????1???1????)2

1.9μm

萬能工具顯微鏡最大允許誤差為±

，當(dāng)被測量為時，萬能工具=±1.8μm，符合均勻分布，取√3??2(??)

1.8 點線規(guī)與萬能工具顯微鏡溫度差引入的標(biāo)準(zhǔn)不確定度分量??3(??)??3(??)

0.0μm 校準(zhǔn)時溫度偏離標(biāo)準(zhǔn)溫度(20時，由點線規(guī)和萬能工具顯微鏡熱膨脹系數(shù)不同引??4(??)PET-6/℃??

±

k√3???

=

(60?10.2)×10?6/℃7不確定度分量不確定度來源標(biāo)準(zhǔn)不確定度??1(??)測量重復(fù)性1.9μm??2(??)萬能工具顯微鏡1.1μm??3(??)點線規(guī)與萬能工具顯微鏡溫度差0.0μm??4(??)偏離標(biāo)準(zhǔn)溫度時熱膨脹系數(shù)不同1.4μm????合成標(biāo)準(zhǔn)不確定度2.7μm冀)

240—2024??4(??)

??4(??)

???

??√3

1.4μm

√3

??

(60?10.2)×10?6℃

5℃表

表

標(biāo)準(zhǔn)不確定度匯總

????

√??1(??)2

??2(??)2+??3(??)2

??4(??)2

2.7μm ??

??

????

2.7

5.4μm8測量次數(shù)12345678910測量值（mm）2.22002.21352.21342.21642.21422.21602.21852.21342.21572.2130冀)

240—2024附錄

C點線規(guī)線紋寬度校準(zhǔn)結(jié)果測量不確定度評定（示例）C.1 C.2 ????

????????被測點線規(guī)線紋寬度的測量結(jié)果，mm????mmC.3 C.3.1 C.1表

重復(fù)性測量結(jié)果√3

表

重復(fù)性測量結(jié)果√3

0.6μm

C.2(????

??1(??)

√∑?????1???1????)2

2.4μm

C.1萬能工具顯微鏡最大允許誤差為±

+10×10=±1.022μm√3??2(??)

1.022C.3.3 點線規(guī)與萬能工具顯微鏡溫度差引入的標(biāo)準(zhǔn)不確定度分量??3(??)恒溫時間，認(rèn)為被校點線規(guī)與萬能工具顯微鏡溫度一致。??3(??)

0.0μmC.3.4 校準(zhǔn)時溫度偏離標(biāo)準(zhǔn)溫度(20時，由點線規(guī)和萬能工具顯微鏡熱膨脹系數(shù)不同引??4(??)PET-6/℃??

±√3???

(6010.2)?6時：??4(??)

???

??4(??)

???

??√3

0.4μm

C.3

(60?10.2)×10?6℃

5℃

9不確定度分量不確定度來源標(biāo)準(zhǔn)不確定度??1(??)測量重復(fù)性2.4μm??2(??)萬能工具顯微鏡0.6μm??3(??)點線規(guī)與萬能工具顯微鏡溫度差0.0μm??4(??)偏離標(biāo)準(zhǔn)溫度時熱膨脹系數(shù)不同0.4μm????合成標(biāo)準(zhǔn)不確定度2.6μm冀)

240—2024C.4 C.2表

表

標(biāo)準(zhǔn)不確定度匯總C.5

????

√??1(??)2

??2(??)2+??3(??)2

??4(??)2

2.6μmC.6 ??

??

????

2.7

5.2μm10