Research and Development of 63ZGLL73 Wide Blade Spiral Drill Rod
CHU Li-hu;Chongqing Research Institute,China Coal Technology Engineering Group;Gas Disaster Monitoring and Emergency Technology National Key Lab;
The structural features and working principle of wide blade spiral drill rod are introduced,the structure and the specific parameters were determined. The technological process, welding process and heat treatment process of wide blade spiral drill rod are analyzed. The overall performance through the industrial test of wide blade spiral drill rod.
【CateGory Index】： TD421