DRILL BIT COMPRISING A CENTRING TIP
收藏国家林业和草原科学数据中心2023-02-12 更新2024-03-07 收录
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https://www.forestdata.cn/dataDetail.html?id=a9765ca7-f2c8-4a0a-adcf-3c39a5998141
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资源简介：
The invention provides a drill bit， in particular serpentine drill， more in particular an auger bit， comprising a circumferential chip removal groove helically about a drill axis and a centering tip having a conical shape with an apex on said drill axis， comprises a lateral cone surface that has a taper angle， comprising a centering tip helical thread which spirals helically from said apex down said centering tip in a thread direction of rotation at a tip thread pitch， and comprising at least one tip recess in a side of the centering tip which provides a cutting edge， an which has a chiptransporting shape and connecting to said circumferential external thread， characterized in that said cone surface comprises at least one step in said taper angle of said lateral surface with each step starting at a step-start position and said at least one step continues about said drill axis at least 90 degrees.
提供机构：
国家林业和草原科学数据中心
创建时间：
2023-02-12
