Rake angle measurement of inclined slotting cutter
This paper analyses the blade shape, the parameters of rake angle of slotting cutter. The theoretical analysis process of a novel rake angle error measurement is introduced, which is built on the theory that the rake face of the inclined slotting cutter is a flat surface. For the systematic errors is caused by inaccurate measurement, the paper give in-depth analysis in various situation. By testing in the GD40-type CNC Gear Measurement Center, the accuracy testing results validate the correctness of the method.
Efficient Multi-Purpose Algorithm for Approximation and Alignment Problems in Coordinate Measurement Techniques
Approximation- and alignment-problem in the field of coordinate measurement techniques are solved in most cases by using the L2-norm (Gaussian least squares sum) as the objective function. However, for an increasing number of applications the L2-norm leads to inaccurate results so that the Tschebyscheff-norm should be applied instead. These cases are for example the measurement of deviations in form and position, matching-tests or the computational fitting of measured points into tolerance-zones. This paper describes a universal algorithm for the approximation according to both the L2norm and T-norm. Additionally, two limits are calculated in between which the “true” value of the maximum deviation lies. Basic mathematics will be briefly explained and results obtained by measurements will be discussed.
Design and manufacture of a shaving cutter with unequal depth gashes
Abstract Gear shaving is a gear finishing operation with high efficiency and high precision. When a work gear has been shaved by a shaving cutter with a true involute profile, the “mid-concave” phenomena inevitably exist around the pitch points of the work gear tooth flanks. Aiming at this problem, a new-style shaving cutter with unequal depth gashes is designed and manufactured. This paper analyses the forming of the gash on the basis of the slotting principle, and proposes a gash-designing method. Experiment has proven that the shaved gear has a better surface finish that achieves the anticipated effect.