Ring-cutting knife

Abstract

The invention discloses a paring circle knife, comprising location bearing and cylindrical hollow cutting knife which is nested on the location bearing through center hole. The cylindrical hollow cutting knife can move up and down. On the back of cylindrical hollow cutting knife there is breather, the head of it there are hackly cutting edges, and on the knife there are arrises. The invention has the advantages of simple structure, easy operation, and wide application. The invention is especially used to maintain the mine equipments.

Description

1. Technical field: [0001] The invention relates to a sealing ring drilling device, in particular to a ring cutting cutter. 2. Background technology: [0002] As we all know, the sealing ring is widely used in various operating equipment and plays a very important role. It is generally manufactured by professional manufacturers. However, many manufacturers often encounter the situation that the sealing ring is not very suitable during the maintenance process. It is necessary to repair the existing sealing ring, or reprocess a new sealing ring, which requires drilling or shearing device. The Chinese patent (the authorized announcement number is CN2422079Y, and the patent number is 00234876.4) discloses a "hollow sleeve drill, It includes a drill shank, a cutter body, a chip guide, and a Morse taper hole and a control surface on the drill shank; the cutter body is in the shape of a circular tube, and there is a cutting edge groove along the axial direction, and the cutting edg...

AI Technical Summary

Problems solved by technology

However, the above-mentioned drill bit needs to be used in conjunction with a drilling machine, and cannot be applied to the maintenance site at any time, which increases the maintenance time and affects the maintenance efficiency. Moreover, the above-mentioned drill bit is mostly used for metal drilling, and there is no special sealing ring for drilling and reaming.

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