Single-parameter variable-camber barrel-type knife tool as well as posture confirming method and use thereof

Abstract

The invention discloses a one-parameter variable camber drum-shaped cutter, a method for determining the pose thereof, and application thereof. The variable camber bus bar of the cutter comprises curves such as involute of circle, ellipse line, hyperbola, parabola, logarithmic curve. The equation of the variable camber bus bar can be selected properly according to the property of the curved surface to be processed. If the involute is used as the bus bar of the cutter, because the only parameter determining the shape of the curve is the radius of a base circle, the involute is called as a one-parameter variable camber bus bar; contact points with the same curvature on the cutter can be determined according to the curvature of the curved surface to be processed; and through the position of the only determined contact point of the curve on the cutter by the equation, the pose of the cutter can be optimized by taking the largest processing line width as an objective function. The cutter has high processing precision and high processing efficiency, and can achieve the highly-efficient processing to the edge part of a blade.

Description

technical field [0001] The invention relates to a machining tool, in particular to a single-parameter variable-curvature drum-shaped tool and a method for determining its pose and application. Background technique [0002] At present, for the processing of medium and small blades of worm gears and impellers, torus cutters, flat bottom cutters with rounded corners and ball-end cutters are mainly used for CNC milling. The processing method is mainly the helical feed method. This processing method has many similarities with the disc cam processing method, that is, during the process of cutting a section of the blade with the tool, the trajectory of the tool positioning point on the workpiece forms a complex path. Space curve, considering the fact that the axial feed lead of milling is very small, this curve can be approximated as a plane curve, and the curvature of the curve changes greatly in a week, and the curvature radius can reach 0.07mm when it is the smallest. It can re...

AI Technical Summary

Problems solved by technology

[0004] Due to the convexity of the inlet and outlet edges of the blade in the cross-sectional direction, the processing line width of the straight generatrix cutter or the convex generatrix cutter will be very small, and the feed speed and acceleration will be too large or the The allowable feed rate at a certain feed rate is too low, and because the blades are very thin, the rigidity of the process system during milling the intake and exhaust edges varies greatly. These factors lead to low machining accuracy and processing efficiency

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