Adjustment of the main kinematic chains of heavy vertical lathes
Journal Title: Proceedings in Manufacturing Systems - Year 2018, Vol 13, Issue 1
Abstract
In this paper the variants of adjusting of the main kinematic chains from the vertical lathes (carousel) are presented. Different possibilities of driving with electric motors are presented in a comparative manner by means of gearbox type gearboxes and belt or tooth belt transmissions. The paper presents the control systems used in older electric motors with a single speed, but also modern systems, in which asynchronous current motors are used having conntonously speed adjustment by frequency variation. It is emphasized the current role of gearboxes which is that of torque amplification and not of speed reduction. It is presented the criteria for choosing the optimal variant from a technical and economical point of view, depending on the specific technological requirements. Some experimental achievements are presented in heavy machine tools from the families of normal and vertical lathes (carousel) for the fabrication and re-fabrication of lathes, which can process pieces having diameters ranging from 800 to 10 000 mm.
Authors and Affiliations
Dan Prodan, George CONSTANTIN, Anca Bucuresteanu
Keywords
Related Articles
- EP ID EP286951
- DOI -
- Views 124
- Downloads 0
Numerical analysis of mechanical stress behavior of rotary kiln of a cement plant
Furnaces are machines that are widely used in industry, especially of cements. They are often subjected to high mechanical and thermal stress. The present work consists in modeling the mechanical behavior of a rotary kil...
Solution aiming the technological improvement of worm and star wheel from single screw compressor
Single screw compressors are frequently used due to their constructive simplicity, leading to a lower price. The level of functional noise is also lower than in the case of other compressors. They usually include a centr...
A PRELIMINARY STUDY ON THE ROTATIONAL MOLDING PROCESS
The rotational molding is a manufacturing method that allows obtaining parts with hollow form by rotating a mold around two perpendicular axes with the part material in the liquid state. Although the manufacturing meth...
SOLUTIONS FOR HYDRAULIC BALANCING OF THE POSITIONING AND FEED KINEMATIC CHAINS IN PORTAL MILLING MACHINES
The authors of this paper introduce hydraulic balancing systems for vertically moving heavy loads. The proposed system is suitable for heavy duty machine tools with crossrail that can be positioned depending on the size...
INNOVATIVE ASSEMBLY TECHNOLOGY AND ASSISTANCE SYSTEMS FOR LARGE COMPONENTS IN AIRCRAFT ASSEMBLY
The global competition challenges aircraft manufactures in high wage countries. The assembly of large components is distinguished by fixed position assembly. Due to a high variant and changing tasks an automation is not...