Showing papers on "Gear shaping published in 2021"
TL;DR: The initial aim of this paper is to present an efficient and accurate method for evaluating the current state of the gear mesh stiffness based on the Isogeometric Analysis and for performance reasons combined with an analytical approach.
13 citations
08 Jun 2021
TL;DR: In this article, an experimental study of the gear shaping process of the internal gearing with a friction coating was performed on a gear-shaping machine model TOS OHO 50 and using an accelerometer 7290A-2.
Abstract: This paper presents an experimental study of the gear shaping process of the internal gearing with a friction coating. It is known that this process is characterized by the occurrence of significant vibrations, the decrease in the stability of the cutting tool, and the ambiguity of the technological parameters. These factors limit the ability to process bimetallic discs with friction coatings on gear-shaping machines. Therefore, the dependence of the amplitude of oscillations of the ram and the table with the fixture for clamping the package of parts on different machining modes are investigated in the paper. The experiment was performed on a gear-shaping machine model TOS OHO 50 and using an accelerometer 7290A-2. To register the vibration acceleration, the Information Collection System “National instruments mod. NI-9234” was used. Also, during the experiment, the analysis of the period of stability of the cutting tool depending on the number of double runs of the shaper-type cutter and circular feed. The tool’s stability was analyzed by the chamfer wear on the rear surface, which was checked by a microscope. According to the experiment results, the optimal processing mode, according to the tool’s maximum productivity and stability, is proposed in the paper. The application of the proposed processing mode reduces the self-excited vibrations of the technological system, increases the cutting tool’s stability, stabilizes the surface roughness parameters, and increases the gear-shaping process’s efficiency of the package of friction discs.
TL;DR: In this article, the influence of cutting parameters of gear shaper on the deformation of gear ring is studied by finite element simulation and practical test, and the results show that the main cutting parameters are radial feed, circumferential feed, stroke speed and cutting depth.
Abstract: Ring gear is an important part of high power transmission system. Because of its thin wall and low stiffness, it is easy to cause deformation in the process of gear shaping, which affects its accuracy. Therefore, how to ensure the quality of gear ring gear insertion is an urgent research topic. In this paper, the influence of cutting parameters of gear shaper on the deformation of gear ring is studied by finite element simulation and practical test. The results show that the influence of main cutting parameters on the deformation of 42CrMo ring gear is radial feed, circumferential feed, stroke speed, and cutting depth. In the actual gear shaping process, the cutting parameters can be adjusted according to this deformation law, so as to control the deformation of the ring gear.
TL;DR: In this paper, an economic process design for the gear shaping of Austempered Ductile Iron (ADI) gears is presented, based on computer-aided force measurements and wear tests.
23 Apr 2021
TL;DR: In this paper, the authors proposed to optimize the geometry parameters of the gear shaper to reduce the cutting force and improve the accuracy of the tooth profile, and the experimental results show that the multi-island genetic algorithm optimization can effectively fit the functional relationship between the geometric parameters and the slotting force.
Abstract: Aiming at the low precision of the tooth profile caused by the excessive cutting force during the machining of thin-walled ring gears, the geometric parameters of the gear shaping cutter are one of the factors affecting the size of the cutting force.The paper proposes to optimize the geometry parameters of the gear shaper to reduce the cutting force and improve the accuracy of the tooth profile. UG is used to model the gear ring and gear shaper, and the model is imported into ABAQUS to simulate and analyze the gear shaping process, and obtain the cutting force during the gear shaping process. The geometric parameters of the gear shaping cutter are used as input variables, and the cutting force of the gear shaping process is taken as the output response. The sample points are designed by optimizing the Latin hypercube experimental method, the mathematical model is established by the response surface approximation model, and the multi-island genetic algorithm is used for different interpolations. The geometric parameters of the tooth cutter are optimized. The experimental results show that the response surface model can effectively fit the functional relationship between the geometric parameters of the gear shaper cutter and the slotting force, and through multi-island genetic algorithm optimization, the slotting force is reduced by 34.87%, and the optimization effect is significant. Excessive slotting force causes the problem of low ring gear tooth profile accuracy, which is of great significance.