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  • 成功案例

    盤式制動襯片的粘接和裂紋缺陷的檢測

    更新時間:2018-04-12 09:14:32點擊次數:3149次

    Detection of cracks and bonding defects
    in disk brake linings.
    盤式制動襯片的粘接和裂紋缺陷的檢測

    In our Application Reports 06/97 and 07/97, we reported on ultrasonic testing of brake linings and of bonded joints in brake bodies.
    在應用報告06/97 和07/97中,我們講述了在制動體中粘接接頭和制動襯片的超聲檢測
    The present case deals with testing of brake bodies, consisting of a steel base plate, a welded-on grid mat as bonding agent and the sinter-fused braking substance (friction lining),
    下圖展示一個焊接上的網格墊作為粘接劑,鋼基體和燒結熔融的制動物質組成的制動體檢測。

    SOLUTION:方案                                   
    The present brake lining structure with its extremely high sound absorption and scattering calls for the through-transmission technique using a test frequency of 100 kHz. We recommend the use of the probes type B 0,1 NN for this application case. This probe type enables a dry and point-to-point coupling.
    由于制動襯片結構具有很高的聲吸收和散射,因此需要頻率為100khz的穿透法技術,推薦使用B0型1 NN 探頭,這種探頭類型能夠實現干式和點對點耦合。
    In order to ensure uniform coupling conditions, it is necessary to have a device enabling to reach a pressure force of ~100 N.

    為了確保耦合的均勻,需要一個能夠達到100N壓力的設備

    In the case of cracks and bonding defects, a low through-transmission amplitude is obtained due to the reduced acoustic transmittance. On the other hand, a high sound amplitude indicates a flaw-free area.
    有裂紋和粘接缺陷的存在情況下,由于降低了聲能的穿透性能,穿透技術得到的波幅會很低,另一方面,在沒有缺陷的區域穿透技術得到的聲波波幅會很高。

    The following figure is an example of the distribution of the through-transmission amplitude (in % screen height) over the lining surface, obtained by point scanning.
    下圖是通過點掃,在襯面上獲得穿透法波幅高度(示波屏高度百分比)分布的舉例

    SUITABLE EQUIPMENT:
    設備

    Ultrasonic flaw detectors: USM 22L  USD 10NF
    超聲儀器
    Probe:     B 0,1 NN  (transmitter and receiver)
    探頭

    Copyright ? 2018 哈爾濱聯航金屬材料有限公司 技術支持:巨耀網絡  黑ICP備18001653號-1

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