Turbine disk fir-shaped mortise broaching tool

Abstract

The invention relates to a turbine disk fir-shaped mortise broaching tool, which is characterized in that a milled chamfer angle of 0.2x45 DEG is arranged on a sharp corner at two sides of the bladewidth of the turbine disk fir-shaped mortise broaching tool, parts 1 to 6 are slotted roughly, a seventh part is roughly broached with a mortise thread shape, an eighth part is precisely broached with a mortise thread-form sectional surface, and the top surface of a ninth part is precisely broached; the parts 1 to 6 adopt six slotting cutters, the seventh part adopts one rough-broaching thread-form cutter, the eighth part adopts one precise-broaching thread-form cutter, and the ninth part adopts one top-surface broach which is also named cap knife. The turbine disk fir-shaped mortise broaching tool has the advantages that the design structure of the broach is changed, the service life of the slotting broach is improved, and the manufacturing precision and the product complete qualification rate of the thread-form precise broach are broken through. The debugging period is successfully shortened, the trial broaching at one time is completely qualified, the production efficiency is improved by 30 percent, and the service life of the broach is prolonged. Compared with the combination-type broach and the powder metallurgy broach, the broaching tool with the above structure has simpler manufacturing process, good interchangeability, safe application and low cost.

Description

technical field [0001] The invention relates to the structural field of broaching tools, and in particular provides a turbine disc fir tree-shaped tongue and groove broaching tool. Background technique [0002] The turbine disk rotates at high temperature and high speed. The turbine disk and the blades are connected by a fir tree-shaped surface. In order to avoid cracks caused by stress concentration, the accuracy of the fir tree-shaped tenon and groove of the turbine disk is required to be high. The tolerance is strict, and the material of the turbine disk part is generally a high-temperature alloy. Its cutting characteristics are: when the high-temperature strength of the material is large, the plastic deformation is large, the cutting force is large, the thermal conductivity is poor, the cutting temperature is high, the work hardening is serious, it is easy to stick to the knife, and the tool life is long. Low, difficult mechanical processing and other technical difficult...

AI Technical Summary

Problems solved by technology

[0002] The turbine disk rotates at high temperature and high speed. The turbine disk and the blades are connected by a fir tree-shaped surface. In order to avoid cracks caused by stress concentration, the accuracy of the fir tree-shaped tenon and groove of the turbine disk is required to be high. The tolerance is strict, and the material of the turbine disk part is generally a high-temperature alloy. Its cutting characteristics are: when the high-temperature strength of the material is large, the plastic deformation is large, the cutting force is large, the thermal conductivity is poor, the cutting temperature is high, the work hardening is serious, it is easy to stick to the knife, and the tool life is long. Low, difficult technical difficulties such as mechanical processing

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