Počítačová podpora v konstrukci obráběcích nástrojů.

Abstract

The submitted dissertation deals with the creation of a computer program in 3D CAD parametric volumetric and planar modeler T-FLEX CAD, which on the basis of input parameters of gearing and monolithic hob cutter given by standard (according to DIN or CSN) or individual requirement and their change can automatically create 3D model of monolithic hob cutter and subsequently display this 3D model as 2D in the form of production drawing in a suitably selected scale fully usable for the actual production of monolithic hob cutter. The basis of the dissertation is the correct selection of a 3D CAD parametric modeler that can define a 3D model based on the specified parameters from the databases, but at the same time can create the necessary parameters in the form of text or numeric variables in the variable editor on the basis of the written relationships and ensure by associativity that each change of a parameter is automatically reflected in the 3D model and the production drawing. In the development of the computer program for the design and construction of the 3D model of the hob cutter, the predefined software option for the helix design (based on the representation of the helix wound on a rotating cylindrical surface in the Monge projection) was used, because the helix as the basic structural element of the 3D model of the monolithic hob cutter appears in the model in different variations. Specifically, in the Monge projection, the task for a given helix motion is to determine the magnitude of the displacement of an arbitrary point in the direction of the axis if the angle of rotation of this point about the axis is known. In order to compare the helix design options, a specific projection of the helix representation in perpendicular axonometry was also presented in the thesis, but it was not used in the proposed computer program. The aim is not to compare the individual variants with each other but to verify the functionality of the created computer program in the 3D CAD modeler T-FLEX CAD by selecting different variants.