Cutting edge position adjustment mechanism and indexable insert type cutting tool

Abstract

By ensuring a large amount of adjustment of the cutting edge position, the number of regrinding is increased and the tool life is extended, and the work of adjusting the cutting edge position is simplified, and the machining accuracy can be improved by realizing fine adjustment of the cutting edge position. The cutting edge position adjustment mechanism (1) of the present invention adjusts the cutting position of the cutting edge member (4) by moving the cutting edge member (4) mounted on the tool body (2) relative to the tool body (2). The position of the cutting edge (8), the cutting edge position adjustment mechanism is characterized in that it includes: a shaft member (5), which is extended and screwed between the tool body (2) and the cutting edge member (4) In the tool body (2); and a nut part (6), which is screwed to the shaft part (5) and abuts against the cutting edge part (4), in the shaft part (5), the screw The first threaded portion (21) fitted to the tool body (2) and the second threaded portion screwed to the nut member (6) are different from each other in the direction along the axis C of the shaft member (5). The positions are set coaxially, and the thread pitch of the first threaded part (21) is different from the thread pitch of the second threaded part.

Description

technical field [0001] The invention relates to a cutting edge position adjustment mechanism and an indexable blade type cutting tool using the adjustment mechanism. Background technique [0002] In the past, for example, as shown in the following patent documents 1 and 2, it is known to have a tool body that rotates around the tool axis and a tool body that is detachably mounted on the front end outer peripheral portion of the tool body and that has a cutting edge toward the front end side of the tool and the tool body. Indexable insert type cutting tools such as face milling cutters with cutting edge parts projecting radially outward. [0003] The indexable insert type cutting tools in the following patent documents 1 and 2 are equipped with a cutting edge position adjustment mechanism that adjusts the position of the cutting edge by moving the cutting edge member relative to the tool body. Specifically, as the cutting edge position adjustment The mechanism has an adjustm...

AI Technical Summary

Problems solved by technology

[0007] That is, in the above-mentioned cutting edge position adjustment mechanism, the fine adjustment of the cutting edge position can be realized by narrowing the thread pitch of the adjustment screw, and the processing accuracy can be improved. The adjustment work becomes troublesome, and the adjustment amount of the cutting edge position cannot be ensured to a large extent

More specifically, it is difficult to ensure the protrusion amount of the cutting edge when regrinding the cutting edge parts, and reduce the number of regrinding, and it is necessary to replace the cutting edge parts early, shortening the tool life

[0008] On the other hand, by increasing the thread pitch of the adjusting screw, the adjustment amount of the cutting edge position can be ensured to a large extent, and the tool life can be extended by increasing the number of regrinding, but at this time it is difficult to fine-tune the cutting edge position and difficult Ensure machining accuracy

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