久久国产精品免费一区,国产深夜福利视频在线,中文字幕制服丝袜第57页,上司揉捏人妻丰满双乳电影,国产乱子伦视频一区二区三区,美女裸体a级毛片,国产偷亚洲偷欧美偷精品,国内揄拍国产精品人妻,特黄三级又爽又粗又大,国产在线国偷精品产拍

        Latest News
        2015/3/21
        Comparison bet
        2015/1/22
        The importance
        2015/1/21
        Troubleshootin
        2014/12/15
        Machinery Exhi
        2014/12/15
        Rayliter Works
        Search
        current position:Home > News > Company News

        Principle of screw head cold heading machine

        Source:http://m.rnbe.cn     Author:冷鐓機(jī)     Time:2014/8/17     Click:
             The forging method of thickening the top of bar or wire at room temperature. Cold heading machines are mainly used to manufacture parts such as bolts, nuts, nails, rivets, and steel balls. The forging billet material can be copper, aluminum, carbon steel, alloy steel, stainless steel, titanium alloy, etc., and the material utilization rate can reach 80-90%. Cold heading is often carried out on specialized cold heading machines, which facilitates continuous, multi station, and automated production. The cold heading machine can sequentially complete processes such as cutting, heading, accumulation, forming, chamfering, wire rolling, diameter reduction, and edge cutting. High production efficiency, reaching over 300 pieces per minute, with a maximum diameter of 48 millimeters for cold heading workpieces. The schematic diagram of the cold heading bolt process is a typical process for cold heading bolts. The multi station nut automatic cold heading machine is a multi station nut automatic cold heading machine. The bar material is automatically fed into a certain length by the feeding mechanism, cut into blanks by the cutting mechanism, and then sequentially sent to the accumulation and punching stations for forming by the clamp conveying mechanism.
        91国内高清在线播放| 成人白浆一区二区三区在线观看| 久久久精品国产亚洲av日韩| 日韩精品卡一卡二在线| 亚洲国产精品一区二区久久| 国产精品久久一区二区三区夜色| 69久久精品无码一区二区| 中文字幕人妻资源在线| av一区二区三区 中文| 中文字幕在线观看不卡一区| 亚洲亚洲夜色精品视频| 国产成人啪午夜精品网站男同| 久久国产视频这里只有精品| 亚洲主播一区二区三区偷拍| 激情五月一区二区三区| 国产精品国产精品亚洲| 激情内射亚洲一区二区| 亚洲自偷精品视频自拍| 亚洲v国产v欧美v久久久久久| 日韩一区二区三区无码a片| 亚洲精品国产成人av| 国产自偷一区二区三区| 国内自拍视频在线观看网| 中文字幕一区二区三区人妻| 正在播放老肥熟妇露脸| 高颜值美女后入内射视频| 男女无遮挡国产精品资源| 国产精品久久久久久久9999| 91老熟女老女人国产老太| 国产激情视频一区二区三区| av中文字幕日韩精品| 国产精品乱码一区二区三区| 麻豆亚洲av成人无码久久精品| 精品国产一区二区国产馆| 午夜亚洲少妇福利诱惑| 亚洲伦理一区二区三区中文| 国内激情一区二区三区| 日韩精品一区二区三区免费观看| 亚洲高清一区二区三区在线| 免费毛片在线观看av| 国产精品一区二区久久精品不卡|