| Popis: |
The article deals with the issues of machining the surfaces of composite bandages, after welding them directly at the assembly site and subsequent operation, using mobile technologies. The design of the device is presented. It includes structural elements of the support of a rotary kiln, with two support rollers, a rotation drive and a special portable machine. Distinctive features for this machining scheme have been established. To enable the cutting process, it is proposed to drive the rim rotation using friction force from one of the support rollers, using a DC motor with a stepless rotation speed control and a reduction gear. A method of searching for rational operating modes of the installation using linear programming is proposed. The necessary technical restrictions on the operating mode of the installation have been determined. They are the power of the rotation drive, the tangential and axial components of the cutting force. The rotation speed of the band and the size of the allowance removed in one working stroke allow varying the treatment process. Selected dependencies allow to establish a connection between the varied parameters and the introduced technical constraints. The system of linear equations is obtained on their basis, by solving which it is possible to obtain the range of values of technological modes that allow the process of machining the surfaces of bandages on the proposed installation. For a bandages with a diameter of 6100 mm, rational technological modes have been obtained that allow the process of restorative treatment of the surfaces of the bandages after welding, directly at the site of their subsequent operation. |
