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天津弗洛拉自動化科技有限公司
主營產(chǎn)品: 眼鏡檢測儀器,眼鏡架檢測儀器,眼鏡偏光測試儀,眼鏡老化試驗箱,恒溫恒濕試驗箱 |
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聯(lián)系電話
![]() |
天津弗洛拉自動化科技有限公司
主營產(chǎn)品: 眼鏡檢測儀器,眼鏡架檢測儀器,眼鏡偏光測試儀,眼鏡老化試驗箱,恒溫恒濕試驗箱 |
聯(lián)系電話
眼鏡架鼻梁邊緣抗彎變形測試儀
鼻梁變形測試儀
測試原因:測定鏡架具有一定的鏡片保留能力,,保證鏡架可安全佩戴2年或以上,,防止鏡片因輕微的沖擊而脫落或扭擰而變形,,影響佩戴效果,。
參考標(biāo)準(zhǔn):EN1836:2005、ISO12870:2004,、GB/T14214:2019等等
技術(shù)參數(shù):
1,、環(huán)形夾具直徑:25mm±2mm
2、加壓桿直徑:10mm±1mm
3,、運(yùn)行裝置:電動+氣動
4,、壓力值:5N
5、持壓時間:5s
6,、計時裝置:電子顯示自動計時
測試方法及標(biāo)準(zhǔn):
1.確定左右鏡片幾何中心點(diǎn),,并計算兩中心點(diǎn)距離C(參考標(biāo)準(zhǔn):ISO8624);
2.在鏡片中心點(diǎn)2mm范圍內(nèi)夾住鏡片,,并使未夾鏡片保持水平狀態(tài),;
3.調(diào)整下降壓桿,使其落點(diǎn)剛好處于中心點(diǎn)2mm范圍內(nèi),,記下此值為初始值;
4.設(shè)定壓力為5N,,啟動儀器,,使位移相當(dāng)于兩鏡片幾何中心距C的10,保持5秒,;
5.將壓桿回復(fù)原位,,放松20秒
6.檢查鏡架是否有裂縫,并測定鼻梁變形百分比(變形量不超過2),。
Edge Transverse Test
Frames to be tested shall be propery glazed.For purposes of unifomity, 6base,2-mm 0.08-in) nominal-centr thickness, V-beveled plano power glass is recommended.The right eyewire of the frame to be tested shal be clamped fimly in the vertical position as wom,with the left eyewire unsupported. A spring balance shall be used to apply a downward force of22.24 Newtons(5-bf) to the endpiece area of the left eye.Pressure shall be released immediately after reaching the 22.24-Newton (5-bf)level. Upon removal of theload, no deformation shal be apparent in the frame.
眼鏡架鼻梁邊緣抗彎變形測試儀
Flat Transverse Test
Frames to be tested shall be properly glazed.For purposes of uniformity,6-base,2-mm (0.08-in) nominal-center thickness, V-beveled plano power glassisrecommended.The frame to be tested shall be laid on afirm, level supportwith the front lens surface downward so that one eye and one-half of the bridge project beyond the edge of the support. The frame shall be clamped frmly in position.A spring balance shall be used to apply a downward force of 4.45 Newtons(1-lbf)to the projecting endpiece area of the frame.Pressure shall be released immediately afterreaching the 4.45-Newton (1-Ibf)level.Upon removal of the load, no deformation shall be apparent in the frame