超声波电镀金刚石钻头工艺研究

Study on ultrasound-assisted electroplating technology of nickel-based diamond bit

为了缩短电镀孕镶金刚石地质钻头的生产周期并改善其性能,进行了超声波作用下电镀金刚石钻头的工艺研究。研究了超声波作用下的镍/金刚石复合电镀工艺,确定了超声波电镀金刚石钻头的制造工艺流程,并根据确定的工艺试制了Ф75.5/49绳索取心钻头进行野外钻进试验。研究结果表明:对于各种粒度的金刚石,当金刚石在静止条件下被预复合包镶至约1/5粒径处时,可以开始超声波复合镀,此时金刚石将不会被超声波振落;施加超声波后,一天至少可以加4层金刚石,相比于常规电镀工艺,钻头生产周期缩短一半以上。野外钻进试验结果表明,相比于普通电镀钻头,超声波电镀钻头钻进时效提高了33%,钻头寿命提高了54.6%。

To shorten the production cycle of electroplated diamond bit and improve its performances, research was conducted on the technique of ultrasound-assisted electroplating. The technique of composite plating of nickel/diamond in ultrasonic field was researched and ultrasound-assisted electroplating technique for diamond bit manufacture was established. Furthermore, Ф75.5/49 eleetroplated diamond wire-line core bits, produced with established ultrasound-assisted electroplating technique, were tested by field drilling. The test results show that it＇ s better that the ultrasonic composite plating be applied when 1/5 of diamond height is imbedded by pre-plating in static state, and diamond grits will not fall out because of the oscillation. Four layers of diamonds can be plated a day by ultrasound-assisted electroplating, so the production cycle of electroplated diamond bit was shortened by half. The result of field drilling test proved that average penetration rate increased by 33% and average bit life increased by 54.6% compared with that of diamond bits made by conventional electroplating.