一种农机零件深孔加工用啄式变速钻设计

针对现有技术的不足,文章设计了一种农机零件深孔加工用啄式变速钻。该农机零件深孔加工用啄式变速钻机架的顶部固定连接L形支撑板,L形支撑板的下表面安装进给机构,进给机构的下方安装钻削加工组件,进给机构的底部安装与钻削加工组件相配合的防护组件,防护组件的外表面底部对称固定连接拉绳,L形支撑板的顶部对称安装与拉绳相配合的卷绕组件。通过设计防护组件和卷绕组件,防水布和挡板将下方的钻头与上方的同步带以及同步轮分隔开来,使得下方的钻头在配合冷却液对机械零件进行钻孔加工时,冷却液不会向上溅到同步带的表面,防止对其产生腐蚀。

国内外旋挖钻机集锦

近年来,国家基础设施建设力度的加大为旋挖钻机市场提供了一个前所未有的发展契机。过去,国内施工市场基本全部引进国外产品,最近两三年,国产旋挖钻机已经取得了突飞猛进的发展。本文涵盖了国内外形形色色的旋挖钻机,旨在为读者提供更多的选择。

Study on drilling mechanism and optimization of percussion-extruding DTH hammer bit

The authors tested the percussion-extruding Down-the-hole(DTH)hammer bit with five different structures and mainly analyzed the drilling mechanism between conical bit and stepped bit.In addition,aiming at "the pile effect" in combination with the advantage of stepped bit,we design a new cam spinning bit and test it outdoors.The result shows that using cam spinning bit can solve the problem of "the pile effect",which can also obtain higher drilling efficiency than using conical bit in high confining pressure strata.It is characterized by novel structure and high drilling speed as well as good guiding,and it is significant for improving efficiency in percussion-extruding drilling technique.