Roller bit and manufacturing method thereof

Abstract

The invention discloses a roller bit and a manufacturing method thereof. A bearing system adopts a rolling cone bearing or a conical arc-shaped slide block section; a method for adjacently connecting a large-head flange thrust surface of a locking screw with a small-head end face of a rolling cone or the slide block section, and adjacently connecting a large-head end face of the rolling cone or the slide block section with an inner thrust surface of an adjacent cone shell is used for tightly arranging a conical rolling or rolling bearing system, and simultaneously realizes the reliable locking function of the cone shell. The characteristic of simple structure of a conical claw shaft is used and an efficient boring process is used for machining. The characteristic that the conical claw shaft is easy to clamp is adopted to split the conical claw shaft and welding on a claw by a complete penetration friction welding process. According to the characteristic that the claw is more flat after the conical claw shaft is split, and a forging blank is flat and easier to mould after a connector and a cone bracket are separated, a process method of firstly separating the connector and the cone bracket, and then machining and welding is used for replacing an existing three-section type machining combined process. Therefore, the service life of a bearing system of the roller bit is prolonged and the manufacturing efficiency of the roller bit is improved.

Description

technical field [0001] The invention relates to a roller cone bit, which is suitable for manufacturing roller cone bits for mining, oil and gas drilling and exploitation, geological drilling, civil construction drilling, drilling pile foundation holes, etc., including three-cone bits and single-cone bits , four-cone drill bits, combined roller cone bits, and roller cone reamers, etc., are rock-breaking products that include extended variants of cone shells. Background technique [0002] The traditional roller cone bit, especially its bearing system, is divided into two categories: rolling bearing and sliding bearing. Sliding bearings have strong load-carrying capacity but are not suitable for high-speed operation, while rolling bearings are suitable for high-speed operation but have weak load-carrying capacity. The common problem they face is that the service life is not long enough, and the early failure of the bearing system accounts for about 80% of all failure rates. In...

AI Technical Summary

Problems solved by technology

It adopts the tapered roller bearing which is close to the present invention, but the locking mechanism is complicated, the reliability is not high enough, and it takes up more valuable space in the cone shell, which reduces the space reserved for the tapered roller bearing and limits the available space of the tapered roller bearing. potential

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