Silviu Berbinschi
CAD Engineer
Here are some of the published papers on national and inetrnational journals or conferences.
3D graphical method for profiling tools that generate helical surfaces
Berbinschi S., Teodor V., Oancea N.,
The International Journal of Advanced Manufacturing Technology
May 2012, Volume 60, Issue 5-8, pp 505-512
DOI: 10.1007/s00170–011–3637–3; ISSN1: 0268-3768; ISSN2: 1344-3015;
impact factor: 1,071
In this paper, we propose a method based on the surfaces enveloping theory developed as a vertical application in the CATIA graphical design environment. This method is created for profiling tools intended to generate cylindrical helical surfaces with constant pitch. The devised method is applicable for the profiling of disc tools which are bounded by a primary peripheral surface of revolution. A few examples for the determination of the tool’s 3D primary peripheral surface are presented such as helical flutes of cutting tools, worms with wide pitches, and gear involute flanks. The results are presented in both graphical and tabular form for completeness. Screen snapshots of the CATIA-based vertical application are also shown.
A study on helical surface generated by the primary peripheral surfaces of ring tool
Berbinschi S., Teodor V., Oancea N.,
The International Journal of Advanced Manufacturing Technology
July 2012, Volume 61, Issue 1-4, pp 15-24
DOI: 10.1007/s00170–011–3687; ISSN1: 0268-3768; ISSN2: 1344-3015
impact factor: 1,071
Often in the engineering practice, cutting tools bounded by primary peripheral surfaces of revolution are used because of their effectiveness. Among these, ring and tangential tools can be used for the generation of constant pitch cylindrical helical surfaces. In this paper, we present an algorithm for the profiling of these types of tools. The algorithm is based on the topological representation of the tool’s primary peripheral surface. The main goal is to devise a methodology for the profiling of tools whose surfaces are reciprocally enveloping with cylindrical helical surfaces. We present a numerical example for the numerical determination of the axial section form for this type of tools. The application method for this algorithm was developed in the CATIA graphical design environment within which the procedure is developed as a vertical application. In addition, we present a solution for the shape correction of the tool’s axial cross-section by considering the existence of singular points on the profile of the helical surface to be generated where multiple normals to the surface exist.
3D graphical method for profiling gear hob tools
Berbinschi S., Teodor V., Oancea N.,
The International Journal of Advanced Manufacturing Technology
January 2013, Volume 64, Issue 1-4, pp 291-304
DOI: 10.1007/s00170-012-3989-3; ISSN1: 0268-3768; ISSN2: 1344-3015
impact factor: 1,071
This paper approaches the issue of profiling gear hob bounded by a cylindrical helical surface with constant pitch, reciprocally enveloping with an ordered surfaces curl. The process kinematics of generation reproduces the 3D gear between the worm and the wheel. This gear has crossing axes and it is used for the profiling of the primary peripheral surface of the gear hub in the intermediary surface method (the common rack-gear of the surfaces curl to be generated and the primary peripheral surface of the gear hob). An algorithm in the CATIA design environment is presented, based onto an original method for the determination of the reference rack-gear form—the rack-gear reciprocally enveloping with the surfaces curl, using the principle of the cylindrical helical motion decomposition in translation and rotation motions. Graphical and analytical profiling examples are presented for the gear hob for generation of a parallel spline shaft and for the generation of a toothed wheel with involute teeth. Solutions for the interference problems, problems due to the singular points onto the profiles, are presented.