我队设计了一种三节式结构、采用三角形活动齿瓦的自由钳（简称活瓦式自由钳），经本队及兄弟单位金刚石钻机试用，证明该钳设计比较合理，齿瓦工作刃部磨损后易于替换，工作可靠、好用，受到工人的欢迎。去年小批量试产，拟在推广使用中进一步完善。一、活瓦式自由钳结构该钳为传统的三节式结构，节板为实心钢件，每 Our team designed a three-section structure and a free-clamp with a triangular movable tooth tile (referred to as a live-tile free-clamp). After trial by the team and the brother unit’s diamond drilling rig, it proved that the clamp design was reasonable and the blade wear was sharp It is easy to replace afterwards, the work is reliable and easy to use, and it is welcomed by the workers. Last year, trial production in small batches was planned to be further improved in the promotion of use. First, the living tile type free clamp structure The pliers is a traditional three-section structure, the plate is a solid steel piece, each