Authors:
I. I. MANILO, doctor of technical sciences, head of department,
G. A. MOSKOVCHENKO, candidate of physic-mathematical sciences, associate professor,
Kurgan State Agricultural Academy named after T. S. Maltsev (KSAA, Lesnikovo, 641300, Kurgan reg., Ketovsky dist.)
Abstract. The process of cold dressing differs in the complexity of the operation of correcting the deviations of the geometrical axis of details from straightness and requires a high qualification of the workman-blacksmith. At the same time, he has to “make an eye” to measure the initial and residual deflections, to orient the part with an extreme point of deflection directly under the working tool, to select the required deflection, producing several pressure with a stamp. That is, the parameters of editing modes are selected and assigned by the operator-blacksmith intuitively, based only on their own experience. This requires unique skills from him, determines low productivity, low quality of editing, which entirely depend on the qualification and business spirit of the worker-ruler. The issues of qualitative editing are especially acute when it is necessary to quickly eliminate the bending of the shaft, and also when repairing imported machinery and technological equipment in the processing branches of the agro-industrial complex, when restoration or production of single copies of shafts is required. The study and analysis of the operation of spatial orientation and shaft installation into the necessary position for editing are carried out by mathematical modeling of the process, that is, by direct application of mathematical apparatuses of physics and mathematics to describe the patterns of formation that change over time and interact in the space of interdependent relationships occurring in a given technological operation. Precise indexes of the quality of straightening of details of the class of shafts are determined to a great extent by the accuracy of the basing of the shafts in the position necessary for straightening relative to the working tool. In particular, after the orientation of the shaft, the extreme deflection point is installed on the prisms mounted on the working table of the correct unit. This operation is carried out by a working tool, which after setting the shaft on the prism performs an elastic-plastic bending. The article shows that when assigning the idle speed of the striker attached to the rod of the hydraulic ram cylinder, it is necessary to take into account the collision of the striker with the shaft and the reorientation of the latter when stacking it on the prisms. By solving a system of differential equations, possible variants of reorientation of the shaft are considered when laying it on prisms.
Keywords: cool edit shafts, the accuracy indicators of the quality of edits, the working area of the unit changes, the accuracy of the shaft based on prisms, a working tool (PEEN), the linear velocity of the striker, collision of the striker shaft and shift shaft on prisms.
