Abstract
Modern manufacturers of multipurpose machining centers design and manufacture equipment according to the criterion of maximum rigidity and productivity to ensure processing of the maximum range of materials at high accelerated cutting modes. As a result, in most machine-building tasks, the support structure of the machine is unnecessarily rigid due to the production of excessively massive frames and body elements of the machine. These structural elements have high weight and size characteristics, which leads to an increase in inertial loads on the drive feed mechanisms. In serial and mass production, heavy elements of the support structure significantly increase the energy consumption of the machine, while reducing labor productivity. Modern methods of design optimization, together with finite element methods, allow solving the problem of energy efficiency and productivity by modifying the support structures according to the criterion of minimum rigidity in accordance with the boundary conditions of the cutting forces when processing the selected product range.
Highlights
Modern manufacturers of metalworking machine tools strive to create an excessively rigid structure of support systems [1] in order to provide the ability to process a large range of parts without losing rigidity and accuracy
The increased material consumption of the support structures of the machine tool and a large rigidity margin leads to a decrease in accuracy due to the increased inertia of the units [2], increases the power consumption of the machine tool due to the movement of greater masses
The column of a CNC milling machine tool was chosen as an experimental model for optimizing the bearing system of a multipurpose machine tool
Summary
Modern manufacturers of metalworking machine tools strive to create an excessively rigid structure of support systems [1] in order to provide the ability to process a large range of parts without losing rigidity and accuracy. Productive tasks can create unnecessary stress and lead to increased deformations in the elastic system, which inevitably leads to a decrease in the nominal machining accuracy. The increased material consumption of the support structures of the machine tool and a large rigidity margin leads to a decrease in accuracy due to the increased inertia of the units [2], increases the power consumption of the machine tool due to the movement of greater masses. There are design optimization methods that allow modernization of the existing geometry and reduction of material consumption while maintaining the specified accuracy
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