Development of Damping Cutter Construction with Rigidity Variation on Holder Length

Purpose of reseach. Results of scientific researches allow increasing in production efficiency, improving products' quality indicators in mechanical engineering. It is connected with increase in efficiency of cutting processes by means of constructive changes of the turning tool to decrease in vibrations.  These vibrations demonstrate that the use of tools with vibroextinguishing effect in the form of damping cutters allows to solve a problem of the best details' processing made from various structural materials successfully. The known structures of  damping cutters have a number of disadvantages connected with the problem of cutters rigidity regulation,with the need of material selection of a cutter body with high damping of required rigidity or its placement in a holder on all holders' body with rabbeting. This  leads to an excessive consumption of materials which has high damping properties and increases labor intensity of cutter installation.

Methods. New design of  lathe knife is offered to increase quality of processing and improvement of regulation conditions by cutters rigidity and consumption decrease of damping material. Increase in damping efficiency of cutter fluctuations is due to installation of one end of a holder with rabbeting in a cover with hollow bottom and sidewalls and the second end of a holder in a cylindrical cover with hollow sidewalls. Regidity of covers is varied remotely by air pumping in covers´ cavity. It is done taking into account the fact that the rigidity of a cylindrical cover is less than rigidity of the second cover.

Results. There is a “force couple” in a cover with smaller rigidity as rigidity of covers with the air pumped in them are vary. Modules of this “force couple” are more than in the other cover. Therefore there is an additional restoring moment from “force couple”. These foreces are equal to difference of forces modules in covers. That increases efficiency of fluctuation damping of a cutter. Position of damping covers independently at distance from each other allows to decrease consumption of vulcanized material.

Conclusion. An offered damping cutter with varied rigidity allows to achieve technical result on improvement of processing quality and decrease consumption of damping vulcanized material.

processing by edge tool, damping cutter, holder, rabbeting, closed elastic cover, union, design, stability of cutting, processing quality

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