|
|
|
| The influences of different segment ratios on drilling performance of thin-wall diamond bits |
| CAO Caiting1，3，LIU Yibo2，3，XU Yanjun2，3，HE Wenkai3，PEI Youdong3 |
| （1.Advanced Technology & Materials Company，Beijing 100081，China； 2.Central Iron & Research Institute
Group，Beijing 100081，China； 3.Beijing Gang Yan Diamond Products Company，Beijing 102200，China） |
|
|
|
|
Abstract Thin-wall diamond bits suitable for 2.0~3.5 kW drilling rigs and processing reinforced concrete were
selected to study the influences of different segment ratios on drilling performance. Based on the preliminary
tests, FS type, 24 mm×3.5 mm×11.5 mm, diamond array patterns segments were selected to weld on the steel ma‐
trix of diameter 63, 83, 102, 152 and 200 mm. Each specification bit welded three different segment ratios. The
cutting performance on C45 reinforced concrete was tested under wet drilling condition. The results show that
when the segment ratio of diameter 63 bit is 72.79%, the segment ratio of diameter 83 bit is 73.67%, the segment
ratio of diameter 102 bit is 74.93%, the segment ratio of diameter 152 bit is 70.39%, and the segment ratio of
diameter 200 bit is 68.78% separately, the cutting speed is the fastest with hand of operator feels stable. Based on
the fact that customers give priority to cutting speed than the cutting feeling, when using thin-wall diamond bits,
it can be concluded that the comprehensive performance is optimal when the segment ratio is about 70%.
|
|
Received: 10 September 2021
|
|
|
|
|
|
|
2022, Vol. 32 
