Universal grinding device for ball core of special coal chemical ball valve for drill lathe

Abstract

The invention relates to a universal grinding device for a ball core of special a coal chemical ball valve for a drill lathe. The universal grinding device is characterized by comprising a taper shank (1) and a grinding plate (2) which are fixedly connected into a whole, wherein 4-8 grinding slots are uniformly distributed in the circumferential direction of the grinding plate (2), and a grinding sand bar is mounted in each grinding slot. The special universal grinding device further comprises a worktable (11) on which a rotating shaft (6) is mounted; one end of the rotating shaft (6) is in transmission connection with an external motor (5) through a transmission mechanism, and the other end is fixedly connected with a three-jaw (7); a tailstock (10) is further mounted on the worktable (11) beside the rotating shaft (6); a tip is mounted on the tailstock (10). The universal grinding device is used on Z525 and Z535 upright drills and can grind the ball core of the ball valve; the surface roughness is higher than 0.8, and the roundness reaches 0.01; the accuracy of machining dimension meets the technical requirement completely.

Description

technical field [0001] The invention relates to a universal grinding device for a ball core of a coal chemical ball valve special for a drilling machine. Background technique [0002] With the increasing number and types of control valves used in the coal chemical industry, the spherical surface of the ball core is required to have relatively high hardness and wear resistance. At present, by using the method of spraying KF300C and spraying WC-17Co on the base material, the surface hardness of the ball core can reach about HRC72. However, it is impossible to use a cutting tool to cut the surface-treated core, and the surface roughness of the sealing surface is about 0.8, and it cannot be processed on an ordinary grinding machine. Therefore, the processing of high-hardness cores becomes the bottleneck of mechanical processing. The drilling machine is a kind of mechanical equipment for processing holes in parts. During the equipment update process in recent years, some vertic...

AI Technical Summary

Problems solved by technology

However, the ball core after surface treatment cannot be cut with a tool, and the surface roughness of the sealing surface is about 0.8, and it cannot be processed on an ordinary grinding machine.

Therefore, the processing of high hardness core becomes the bottleneck of mechanical processing

The drilling machine is a kind of mechanical equipment for processing holes in parts. During the equipment update process in recent years, some vertical drilling machines have been left idle. On the other hand, with the increasing types and quantities of ball valves used in the coal chemical industry The more, the spherical surface processing of the high hardness ball core cannot meet the production requirements, so it is an urgent need to grind the high hardness ball core on the vertical drilling machine

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