Various types of fastener products: composition of elastic cylindrical pins, collars, self tapping screws, and waveform spring washers

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Various types of fastener products: composition of elastic cylindrical pins, collars, self tapping screws, and waveform spring washers

date:[2013-08-02]     pk_hits:
波形彈簧墊圈連接的摩擦面需要通過處理以達(dá)到規(guī)范要求的抗滑移系數(shù)(使連接件摩擦面產(chǎn)生滑動(dòng)時(shí)的外力與垂直于摩擦面的簧片螺母預(yù)拉力之和的比值,是影響承載力的重要因素)數(shù)值。摩擦面的處理一般是和鋼構(gòu)件表面處理一起進(jìn)行的,只是處理過后不再進(jìn)行涂裝處理?;善菽改Σ撩娴奶幚矸椒煞譃閲娚?丸)法、砂輪打磨法、鋼絲刷人工除銹法(用于不重要的結(jié)構(gòu))和酸洗法。目前大型緊固件廠基本上都采用噴丸法,酸洗法因受環(huán)境的限制,基本已淘汰。
彈性圓柱銷、環(huán)箍、自攻螺釘及圓柱頭焊釘?shù)臉?gòu)成
(1)彈性圓柱銷一般采用未經(jīng)加工的圓鋼制作而成,其材質(zhì)宜采用Q235鋼或鄰45鋼。用于底部時(shí)通常采用雙螺母緊固,保證連接的牢固性。
(2)環(huán)箍由釘頭、釘桿和套環(huán)組成,屬緊固件中冷鉚鉚釘,用來固定彩鋼板和鋼結(jié)構(gòu)。緊固時(shí),將鉚釘單面放人已鎖好孔的構(gòu)件中,釘芯插人拉鉚槍的槍頭內(nèi),槍頭要緊頂鉚釘?shù)亩嗣?,進(jìn)行拉鉚操作,直至鉚釘向反面膨脹,釘芯拉斷為止。
(3)波形彈簧墊圈多用于薄的金屬板之間的連接,可分為自鉆自攻螺釘和普通自攻螺銳普通自攻螺釘在連接時(shí)必須經(jīng)過鉆孔和攻螺紋兩道工序,而自鉆自攻螺釘在連接時(shí),將兩道工序合并一次完成。它先用螺釘前面的鉆頭進(jìn)行鉆孔,接著就用螺釘進(jìn)行攻螺紋,節(jié)約施工時(shí)間,提高施工效率。
(4)回柱頭焊釘根據(jù)(電弧螺往焊用圓柱頭焊釘)(GB/T 10433-2002)環(huán)箍按其公稱直徑的大小共有10一25 mm六種規(guī)格,鋼結(jié)構(gòu)及組合樓板中常用的焊釘直徑有16mm 19mm和22mm三種。
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