A combined damping tool holder

Abstract

The invention discloses a combined vibration-damping cutter bar, which comprises a cutter bar body, a cantilever beam damping block, a cantilever beam rod, a slider, a simply supported beam vibration-damping block and an adjustment rod. The inner cavity extending axially along the cutter bar, the cantilever beam damping block, the slider and the simply supported beam damping block are all placed in the inner cavity, and the first end of the cantilever beam rod is connected with the cantilever beam damping block. The two ends can be axially adjusted at the front end of the tool bar body. The slider and the simply supported beam damping block are connected through a connecting piece and installed on the first end of the adjustment rod. The second end of the adjustment rod can be axially adjusted. Connected to the rear end of the tool bar body, the combined vibration-damping tool bar of the present invention has the advantages of simple and stable structure, good shock-absorbing effect, and convenient parameter adjustment.

Description

technical field [0001] The invention relates to the field of metal cutting tools, in particular to a combined damping tool holder. Background technique [0002] Internal hole processing tools are often used in deep hole processing, that is, the tool needs to have a large length-to-diameter ratio. However, in actual processing, when the overhanging length-to-diameter ratio of the tool is greater than 4, tool vibration is very likely to occur, which will not only cause product processing The accuracy will drop, and in severe cases, it will cause damage to the cutting edge of the tool, and the noise generated by cutting will also have a negative impact on the health of processing personnel. [0003] In order to solve the above technical problems, there are many technical solutions in the prior art. At present, the more commonly used one in the prior art is the dynamic damping tool holder, that is, the structural type of one or several mass blocks is arranged inside the tool hol...

AI Technical Summary

Problems solved by technology

This design cannot adjust the damping and stiffness parameters of the vibration reduction system. When the vibration frequency of tool machining changes with the change of processing conditions, the vibration reduction effect will be weakened, and it is not suitable for the wide-frequency characteristic of cutting processing; Chinese patent document CN109249043A discloses a vibration-damping turning tool and its design method. This turning tool has a cavity designed in the cutter body near the cutter head side, and a vibration-damping block and a plurality of rubbers are arranged in the cavity. The damping block composed of rings, the damping block and the damping block are connected in series through a spring rod. One end of the spring rod is a damping block, and the other end is connected to the tool bar to form a cantilever beam damping system. By changing the overhang of the cantilever beam The degree and the rubber ring on the damping block adjust the stiffness coefficient and damping coefficient of the damping system to realize the adjustment of the damping parameters to adapt to the processing environment of frequency conversion excitation. When adjusting the parameters of this technical scheme, the cutter head and the cutter body need to be adjusted. Split, and then adjust the operation, the operation is complicated, the processing efficiency is low, and because the cutter head and the cutter body are split structures, it is not conducive to the strength and rigidity design of the cutter; Chinese patent document CN109465506A discloses a large-pitch thread vibration reduction The cutter bar uses magnetorheological fluid to change the damping and stiffness coefficients through the changing magnetic field transmitted by the excitation coil designed on the cutter body, so as to realize the parameter adjustment of the vibration reduction system. The matching conditions are harsh and the cost is high

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