Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Journal of Machine Engineering

2 2015

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

The Method of In Plane Generating Trajectories for Tools which Generate by Enveloping Application in CATIA

Teodor V., Paunoiu V., Berbinschi S., Baroiu N., Oancea N.

Journal of Machine Engineering

2015

Vol. 15, No. 4

69--80

The method of “in-plane generating trajectories” is a method designed to study the enveloping profiles associated with a pair of rolling centrodes. This method assumes knowledge the analytical form of the in-planes trajectories described by the points onto the profiles to be generated. These trajectories are known in the reference system of the generating tool, which may be a rack-gear, a gear-shaped or a rotary cutter tool. The envelope of these trajectories represents the profile of the generating tool. An original method for determining the enveloping condition is presented in this paper. Application for ordered curling of non-involute profiles were developed based on the specific enveloping condition. A new solution is proposed. This solution uses the capabilities of the CATIA graphical environment. Graphical solutions are proposed versus analytical solutions in order to validate the proposed method.

The Hydro-Multipoint Forming Process of Complex Sheet Metal Parts

Paunoiu V., Teodor V., Baraoiu N.

Journal of Machine Engineering

2015

Vol. 15, No. 3

106--116

The paper presents the concept of a new tool for the sheet metal blanks deformation which is based on the hydro-multipoint method. In this method the upper die with pins is replaced with a hydraulic pressure chamber. The blank sheet is placed between two flexible interpolators and it is deformed under the action of the pressure applied from the hydraulic chamber until it takes the shape of the multipoint die located at the bottom of the equipment. A critical review of the main hydroforming and multipoint forming methods is done. Then, a simulation model for the new hydro-multipoint forming tool is developed. Material thickness, stresses and part dimensions are analysed. A mechanical hydro-multipoint forming tool which was designed and manufactured based on the new concept is presented. Using this tool a number of experiments are done. The real parts are evaluated in terms of surface quality and parts dimensions. The experimental results come to validate the numerical ones. Finally, it was concluded that this new die concept could be used in manufacturing complex sheet metal parts.