scholarly journals Experimental Research on the Surface Quality of Milling Contour Bevel Gears

2021 ◽  
Author(s):  
Mingyang Wu ◽  
Jianyu Zhang ◽  
Chunjie Ma ◽  
Yali Zhang ◽  
Yaonan Cheng
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Surface Defects ◽  
Low Noise ◽  
Tooth Surface ◽  
Machining Accuracy ◽  
Machined Surface ◽  
Bevel Gears ◽  
Machined Surface Roughness

Abstract Contour bevel gears have the advantages of high coincidence, low noise and large bearing capacity, which are widely used in automobile manufacturing, shipbuilding and construction machinery. However, the quality of the tooth surface has a significant impact on the transmission accuracy of the gear, so it is of great significance to optimize the surface quality of the contour bevel gear. This paper firstly analyzes the formation process of machined surface roughness of contour bevel gears on the basis of generating machining method, and dry milling experiments of contour bevel gears are conducted to analyze the effects of cutting speed and feed rate on the machined surface roughness and surface topography of the workpiece. Then, the surface defects on the machined surface of the workpiece are studied by SEM, and the causes of the surface defects are analyzed by EDS. After that, XRD is used to compare the microscopic grains of the machined surface and the substrate material for diffraction peak analysis, and the effect of cutting parameters on the microhardness of the workpiece machined surface is investigated by work hardening experiment. The research results are of great significant for improving the machining accuracy of contour bevel gears, reducing friction losses and improving transmission efficiency.

Evaluation of DPI Change Impact on Laser Machined Surface Quality

2014 ◽  
Vol 474 ◽  
pp. 369-374
Author(s):  
Jana Knedlova ◽  
Libuše Sýkorová ◽  
Vladimír Pata ◽  
Martina Malachová
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Laser Micromachining ◽  
Technological Parameters ◽  
Machined Surface ◽  
Machined Surface Quality ◽  
Machined Surface Roughness ◽  
Change Impact

The article focuses on the field of PMMA laser micromachining at change of the technological parameters. The aim was to evaluate machined surface roughness at different setting of DPI definition (number of dots paths on square inch). Commercial CO2laser Mercury L-30 by firm LaserPro, USA was used for experimental machining. Ray of laser could be focused on mark diameter d=185 mm.

ANALYSIS OF THE CORRELATION BETWEEN FRACTAL STRUCTURE OF CUTTING FORCE SIGNAL AND SURFACE ROUGHNESS OF MACHINED WORKPIECE IN END MILLING OPERATION

Fractals ◽  
2019 ◽  
Vol 27 (02) ◽  
pp. 1950013 ◽  
Author(s):  
AHMAD THUFFAIL THASTHAKEER ◽  
ALI AKHAVAN FARID ◽  
CHANG TECK SENG ◽  
HAMIDREZA NAMAZI
Keyword(s):  
Surface Roughness ◽  
Cutting Force ◽  
Surface Quality ◽  
Cutting Forces ◽  
End Milling ◽  
Complex Structure ◽  
Machined Surface ◽  
End Mills ◽  
Machining Operations

Analysis of the machined surface is one of the major issues in machining operations. On the other hand, investigating about the variations of cutting forces in machining operation has great importance. Since variations of cutting forces affect the surface quality of machined workpiece, therefore, analysis of the correlation between cutting forces and surface roughness of machined workpiece is very important. In this paper, we employ fractal analysis in order to investigate about the complex structure of cutting forces and relate them to the surface quality of machined workpiece. The experiments have been conducted in different conditions that were selected based on cutting depths, type of cutting tool (serrated versus. square end mills) and machining conditions (wet and dry machining). The result of analysis showed that among all comparisons, we could only see the correlation between complex structure of cutting force and the surface roughness of machined workpiece in case of using serrated end mill in wet machining condition. The employed methodology in this research can be widely applied to other types of machining operations to analyze the effect of variations of different parameters on variability of cutting forces and surface roughness of machined workpiece and then investigate about their correlation.

The Influence of Cutting Conditions on Surface Roughness during Steel 100Cr6 Grinding

2017 ◽  
Vol 261 ◽  
pp. 215-220
Author(s):  
Martin Novák ◽  
Natasa Naprstkova
Keyword(s):  
Surface Roughness ◽  
Bearing Steel ◽  
Cutting Conditions ◽  
Machining Process ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Bearing Steels ◽  
Technology Products ◽  
Machined Surface Roughness

Machining of tool steels is often an important used technology. Products made from these materials are often used in mechanical engineering, and quality of workpiece surface roughness after machining respective grinding is one of the important parameters that to us speak about the quality of the machining process. The paper deals with the influence of cutting conditions when grinding bearing steel 100Cr (EN ISO) on machined surface roughness. This steel belongs to a group of bearing steels.

Research on ELID Grinding Efficient Surface Forming Mechanism of SiCp/Al Composites

2014 ◽  
Vol 1027 ◽  
pp. 107-110
Author(s):  
Jia Liang Guan ◽  
Lei Zhu ◽  
Ling Chen ◽  
Xin Qiang Ma ◽  
Xiao Hui Zhang
Keyword(s):  
Surface Roughness ◽  
Surface Defects ◽  
Volume Fraction ◽  
Removal Mechanism ◽  
Precision Grinding ◽  
Machined Surface ◽  
Forming Mechanism ◽  
Elid Grinding ◽  
Machined Surface Roughness

The electrolytic in-process dressing (ELID) grinding technology was adopted for precision grinding experiments of volume fraction of 40% of SiCp/Al composites, obtaining the machined surface roughness of Ra0.030μm. Studying the forming mechanism of processed surface, analyzing several typical grinding surface defects, summarizing the grinding characteristics and removal mechanism of SiCp/Al composites.

The Influence of Cutting Conditions on Surface Roughness during Steel X38CrMoV5 Grinding

2013 ◽  
Vol 581 ◽  
pp. 247-254 ◽  
Author(s):  
Martin Novák ◽  
Natasa Naprstkova
Keyword(s):  
Surface Roughness ◽  
Cutting Conditions ◽  
Machining Process ◽  
Tool Steels ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Technology Products ◽  
Machined Surface Roughness ◽  
Grinding Tool

Machining of tool steels is often an important used technology. Products made from these materials are often used in mechanical engineering, and quality of workpiece surface roughness after machining respective grinding is one of the important parameters that to us speak about the quality of the machining process. The paper deals with the influence of cutting conditions when grinding tool steel X38CrMoV5 (EN ISO) on machined surface roughness.

Characterization of Topography of Cut Surface Based on Theoretical Roughness Indexes

2011 ◽  
Vol 496 ◽  
pp. 194-199 ◽  
Author(s):  
Csaba Felhő ◽  
János Kundrák
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Tribological Properties ◽  
Significant Influence ◽  
Machined Surface ◽  
Edge Geometry ◽  
Mathematical Relation ◽  
Cut Surface

The microgeometry of cut surfaces is one important characteristic of surface quality, since it has significant influence on the tribological properties of working surfaces. In addition to the ability to plan the economical effectiveness of cutting and the accuracy of workpieces the ability to plan the quality of machined surfaces has also emphasized importance. This is why the predictability of surface roughness in planning of technological processes is more and more important. More and more opportunities presenting themselves and one of these is the estimation of the expected value of roughness of the machined surface on the basis of the theoretical value of roughness. The paper focuses on the introduction of a method to describe a mathematical relation between the theoretical and the measured roughness indexes in cutting with tools having defined edge geometry, thus the planning may be more accurate.

scholarly journals Investigation of Increasing the Tooth Surface Quality of Curvilinear Involute Gears

2021 ◽  
Author(s):  
mahir uzun ◽  
Şemsettin TEMİZ ◽  
Mehmet Sinan ÇETİN
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Noise Analysis ◽  
Tooth Profile ◽  
Tooth Surface ◽  
Cnc Milling ◽  
Cnc Machine ◽  
Target Model ◽  
Photographic Records

Abstract It is not possible to increase the surface quality of non-standard gears with curved involute tooth profile produced by 5-axis CNC milling method with standard gear grinding methods due to curved tooth profiles. In this study, the possibilities of increasing the surface quality of non-standard gears with curved involute tooth profile were investigated in order to expand their use in the industry. For this purpose, the target model was produced by using the mathematical parametric equations of the involute curve that forms the profile form of a tooth in the CAD environment. By using the target model, manufacturing codes were derived in the CAM environment, and gears with curved involute tooth profile were produced on a 5-axis CNC machine. Then these gears; The possibilities of increasing the tooth profile surface quality were investigated by applying four different methods, such as precision finishing, co-running in oil, co-running in oil with SiC added, and grinding on a 5-axis CNC machine with a finger grinding tip specially produced for gears. In the oil co-run method, considering the running-in stage for each method, the gears were tested with the help of the designed gearbox, at a revolution speed of 670 rpm, by turning a total of 150,000 turns in 6 periods of 25,000 turns. In the co-start method, the gears at the beginning of the test and at the end of each period; thermal records, noise analysis, photographic records, surface roughness values (Ra, Rz) were measured. In the co-operation methods applied to increase the surface quality, the tooth surface of the gears at the beginning of the test and at the end of each period; photographic records, surface roughness values (Ra, Rz) were measured, noise levels were measured during the test and thermal records were taken. Similarly, in precision machining and grinding methods, photographic recordings of the tooth surface were taken, surface roughness (Ra, Rz) was measured, micrographs were taken in SEM and analyzed after the process. As a result of the tests and analyzes carried out; It has been observed that the surface quality is the best in the process performed using a specially produced finger grinding tip and a CNC grinding machine.

scholarly journals SURFACE QUALITY OF PERUVIAN AMAZON WOODS SUBMITTED FOR PLANNING AND SANDING

FLORESTA ◽  
2019 ◽  
Vol 49 (4) ◽  
pp. 671 ◽  
Author(s):  
Miguel Meléndez Cárdenas ◽  
Claudio Gumane Francisco Juizo ◽  
Neptalí Bustamante Guillén ◽  
Hector Enrique Gonzáles Mora ◽  
Ricardo Jorge Klitzke ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Wood Surface ◽  
Cutting Planes ◽  
Processing Conditions ◽  
Peruvian Amazon ◽  
Machined Surface ◽  
Industrial Processing ◽  
Needle Detection

The present study aimed to evaluate the quality of the machined surface of wood of Peruvian Amazonian species under industrial processing conditions. For this, planks of capirona (Calycophyllum spruceanum), cachimbo (Cariniana domestica) and copaíba (Copaifera paupera) were obtained from which four specimens of each species were removed and selected. The specimens were previously conditioned and subsequently submitted to planing and sanding operations, considering three cutting orientations (tangential, radial and intermediate). Then, the quality of the flattened and sanded surfaces of the studied species was evaluated by measuring the surface roughness (Ra) by means of a digital needle detection roughness meter. The results indicated significant differences in wood surface quality among the species in the three evaluated cutting planes, and the capirona radial plane had better planing and sanding quality. Concomitantly, due to the operations performed, the capirona wood allowed a greater possibility for better finishing, followed by cachimbo and copaíba wood, thus being grouped in the 1st, 2nd, and 3rd surface quality classes, respectively.

Machined Surface Quality Improvement Measures Affecting Factors and Research

2014 ◽  
Vol 496-500 ◽  
pp. 516-519
Author(s):  
Hong Cai Yang ◽  
Ming Qing Wu
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Physical And Mechanical Properties ◽  
Machining Accuracy ◽  
Affecting Factors ◽  
Machined Surface ◽  
Process Measures ◽  
Factors Affecting ◽  
Mechanical Products ◽  
Quality Assurance Measure

The use of mechanical products to improve performance and increase the service life of components and composition of the product processing quality is closely related to machining quality is the basis of product quality assurance. Measure of good or bad quality parts machining the main indicators are: machining accuracy and surface roughness. This paper mainly affect parts of the surface roughness factor, parts of the surface layer of the physical and mechanical properties (surface work hardening, residual stress, microstructure change and grinding burn), surface quality performance parts and other factors affecting the analysis and research to improve the quality of machined surface process measures.

scholarly journals Study on Surface Roughness of Gcr15 Machined by Micro-Texture PCBN Tools

Machines ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 42 ◽  
Author(s):  
Chen Pan ◽  
Qinghua Li ◽  
Kaixing Hu ◽  
Yuxin Jiao ◽  
Yumei Song
Keyword(s):  
Surface Roughness ◽  
Cubic Boron Nitride ◽  
Bearing Steel ◽  
Cutting Edge ◽  
Machined Surface ◽  
Machined Surface Roughness ◽  
Influence Degree ◽  
Pcbn Tools ◽  
Cutting Speeds

This paper applies micro textures to the rake face of PCBN (Polycrystalline Cubic Boron Nitride) tools, including three types of micro textures that are microgroove textures vertical to the cutting edge, microgroove textures parallel to the cutting edge, and microhole textures. In this paper, the effects of different cutting speeds on the surface quality of hardened bearing steel GCr15 by dry turning with non-texture PCBN tools and micro-texture PCBN tools are studied, and the surface roughness values obtained by different micro textures were compared and analyzed. The results showed that, compared to that of non-texture tools, the influence degree of the micro-texture tools on the machined surface roughness was different. The microhole texture and vertical microgroove texture were able to effectively reduce the surface roughness of the workpiece, and microhole texture had the best effective influence on surface roughness, but the parallel microgroove texture increased surface roughness. The influence of cutting speeds on surface roughness was different due to different types of micro textures. The influence of micro textures on surface roughness has huge potential for tool applications.

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