Fixed tool holder for indexable insert

Abstract

The invention discloses a fixed tool holder for an indexable insert, which comprises a tool post, a clamping bolt and a holder, the tool post is provided with an indexable insert mounting part and a bolt mounting hole, the holder is arranged above the tool post and is provided with a through hole, the clamping bolt is sleeved inside the through hole and is threadedly connected with the bolt mounting hole, the clamping bolt is sleeved with a compression spring which is positioned between the tool post and the holder, the part of the circumference of the through hole of the holder, which is connected with the compression spring, is provided with a limit protrusion extending downwards, the upper segment of the bolt mounting hole is provided with an accommodating hole, and the limit protrusion is arranged inside the accommodating hole. The fixed tool holder for the indexable insert has the advantage of limiting the movement of the holder in the process of mounting the insert in order to hold and position the insert more accurately and firmly.

Description

Fixed cartridges for indexable inserts technical field The invention relates to mechanical cutting technology, in particular to a fixed tool holder for an indexable insert. Background technique At present, there are indexable cutting inserts made of cemented carbide materials or ceramic materials in various shapes, such as diamond-shaped, rhombohedral and triangular-shaped indexable inserts, which are usually fixed by mechanical clamping tool holders . There are many types of tool holders for fixing indexable blades. For example, the patent No. ZL95193314.0 discloses a tool holder for fixing indexable blades. The clamping device of the tool holder is When the blade is tightened, at the junction of the bottom surface of the front end of the clamping part and the positioning top surface of the indexable blade, the edge of the center positioning hole of the blade is stressed, and the force-bearing area is small, which is likely to cause stress concentration. The tendency of...

AI Technical Summary

Problems solved by technology

There are many types of tool holders for fixing indexable blades. For example, the patent No. ZL95193314.0 discloses a tool holder for fixing indexable blades. The clamping device of the tool holder is When the blade is tightened, at the junction of the bottom surface of the front end of the clamping part and the positioning top surface of the indexable blade, the edge of the center positioning hole of the blade is stressed, and the force-bearing area is small, which is likely to cause stress concentration. The tendency of cracking, and the friction between the clamping bolt and the clamping part may cause the clamping part to swing left and right, which may cause the blade to shift and affect the precise positioning of the blade; in addition, the clamping device and the inner wall of the center positioning hole of the blade It is a one-point contact or a small segment of arc line contact. The lateral clamping force of the clamping device on the blade is concentrated at this point. The area of ​​the force point is small, the stress is concentrated, the force on the blade is uneven, and the blade is broken along the force point. trend, it is also possible that the entire tool system is unstable

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