Investigations on the impact fracture of cemented carbide insert during heavy-duty cutting

2018 ◽  
Vol 20 (1) ◽  
pp. 1
Author(s):  
Genghuang He ◽  
Ming Xu ◽  
Yaonan Cheng ◽  
Li Liu ◽  
Tong Wang
Keyword(s):  
Impact Fracture ◽  
Cemented Carbide ◽  
Heavy Duty ◽  
The Impact ◽  
Carbide Insert

Experimental Study of Element Diffusion between the Material of Heavy-Duty Cemented Carbide Insert and the Material of Large Cylinder

2016 ◽  
Vol 693 ◽  
pp. 669-673
Author(s):  
L. Liu ◽  
Yao Nan Cheng ◽  
F.G. Yan ◽  
Y. Han ◽  
T. Wang
Keyword(s):  
Experimental Study ◽  
Cutting Conditions ◽  
Cemented Carbide ◽  
Diffusion Experiment ◽  
Heavy Duty ◽  
Experimental Scheme ◽  
Material Characteristics ◽  
Element Diffusion ◽  
Large Cylinder ◽  
Carbide Insert

Aiming at the problem of bonding breakage of cemented carbide insert in the process of heavy-duty cutting large cylinder, the experimental study of element diffusion between workpiece and insert material is done. Firstly, the conditions of insert bonding breakage are analyzed according to the heavy-duty cutting conditions of large cylinder and the material characteristics of workpiece and insert. And then, the experimental scheme of element diffusion is proposed. The element diffusion experiment is done, and the diffusion elements in the diffusion section of specimens are analyzed. At last, the species, distance and concentration of diffusion elements are analyzed. This provides a basis for further research of tool bonding breakage.

Analysis of fatigue damage of cemented carbide insert during the heavy-duty milling of water chamber head

2020 ◽  
Vol 564 (1) ◽  
pp. 78-90
Author(s):  
Yaonan Cheng ◽  
Chunyang Li ◽  
Li Liu ◽  
Qiyao Lv ◽  
Qihang Yuan
Keyword(s):  
Fatigue Damage ◽  
Cemented Carbide ◽  
Heavy Duty ◽  
Water Chamber ◽  
Carbide Insert

Impact of Different Film-Cooling Modes at Trailing Edge on the Aerodynamic Performance of Heavy Duty Gas Turbine Cascade

2011 ◽  
Vol 84-85 ◽  
pp. 259-263
Author(s):  
Xun Liu ◽  
Song Tao Wang ◽  
Xun Zhou ◽  
Guo Tai Feng
Keyword(s):  
Gas Turbine ◽  
Film Cooling ◽  
Large Mass ◽  
Turbine Cascade ◽  
Heavy Duty ◽  
Trailing Edge ◽  
Central Difference ◽  
Adiabatic Effectiveness ◽  
Heavy Duty Gas Turbine ◽  
The Impact

In this paper, the trailing edge film cooling flow field of a heavy duty gas turbine cascade has been studied by central difference scheme and multi-block grid technique. The research is based on the three-dimensional N-S equation solver. By way of analysis of the temperature field, the distribution of profile pressure, and the distribution of film-cooling adiabatic effectiveness in the region of trailing edge with different cool air injection mass and different angles, it is found that the impact on the film-cooling adiabatic effectiveness is slightly by changing the injection mass. The distribution of profile pressure dropped intensely at the pressure side near the injection holes line with the large mass cooling air. The cooling effect is good in the region of trailing edge while the injection air is along the direction of stream.

Investigation on three-directional dynamic interaction between a heavy-duty vehicle and a curved bridge

2017 ◽  
Vol 21 (5) ◽  
pp. 721-738 ◽  
Author(s):  
Shaohua Li ◽  
Jianying Ren
Keyword(s):  
Interaction Model ◽  
Element Model ◽  
Driver Model ◽  
Impact Factors ◽  
Lateral Impact ◽  
Heavy Duty ◽  
Vehicle Model ◽  
Curved Bridge ◽  
Bridge Model ◽  
The Impact

Considering the nonlinear property of suspension damping and tire stiffness, a full-vehicle model is built for a heavy-duty truck. A modified preview driver model with nonlinear time delay is inserted into the vehicle model to compute the suitable steering angle of the front wheel and to make the vehicle follow the required route. Next, the finite element model of a five-span continuous curved highway bridge is established, and the bridge’s inherent frequencies and modes are obtained. The curved bridge and the vehicle are coupled by three-directional tire forces, and a three-directional driver–vehicle–bridge interaction model is presented. The presented vehicle model and bridge model are verified by comparing with the published works. The dynamic impact factors of vertical, lateral, and torsional displacements of the bridge are calculated when a vehicle is traversing through the bridge, and the impact factors’ distributions along the bridge are analyzed. The effects of vehicle driving conditions on impact factors are also researched. It is found that the impact factor calculated from the present specification for a straight bridge is smaller than that from the three-directional driver–vehicle–bridge interaction model, and the vertical and torsional impact effects at the third span midpoint are greater than the lateral impact effect.

Map Width Enhancement Technique for a Turbocharger Compressor

2013 ◽  
Vol 136 (6) ◽  
Author(s):  
Subenuka Sivagnanasundaram ◽  
Stephen Spence ◽  
Juliana Early
Keyword(s):  
Performance Improvement ◽  
Peak Pressure ◽  
Pressure Ratio ◽  
Comparison Study ◽  
Heavy Duty ◽  
Recirculating Flow ◽  
Heavy Duty Diesel ◽  
And Performance ◽  
The Stability ◽  
The Impact

This paper presents an investigation of map width enhancement and the performance improvement of a turbocharger compressor using a series of static vanes in the annular cavity of a classical bleed slot system. The investigation has been carried out using both experimental and numerical analysis. The compressor stage used for this study is from a turbocharger unit used in heavy duty diesel engines of approximately 300 kW. Two types of vanes were designed and added to the annular cavity of the baseline classical bleed slot system. The purpose of the annular cavity vane technique is to remove some of the swirl that can be carried through the bleed slot system, which would influence the pressure ratio. In addition to this, the series of cavity vanes provides a better guidance to the slot recirculating flow before it mixes with the impeller main inlet flow. Better guidance of the flow improves the mixing at the inducer inlet in the circumferential direction. As a consequence, the stability of the compressor is improved at lower flow rates and a wider map can be achieved. The impact of two cavity vane designs on the map width and performance of the compressor was highlighted through a detailed analysis of the impeller flow field. The numerical and experimental study revealed that an effective vane design can improve the map width and pressure ratio characteristic without an efficiency penalty compared to the classical bleed slot system without vanes. The comparison study between the cavity vane and noncavity vane configurations presented in this paper showed that the map width was improved by 14.3% due to a significant reduction in surge flow and the peak pressure ratio was improved by 2.25% with the addition of a series of cavity vanes in the annular cavity of the bleed slot system.

scholarly journals Accreditation of research in the thermo-climatic chamber - various aspects

2018 ◽  
Vol 183 ◽  
pp. 01009
Author(s):  
Artur Gawlik ◽  
Piotr Kucybała ◽  
Danuta Owczarek ◽  
Janusz Pobędza
Keyword(s):  
Quality Management ◽  
Environmental Conditions ◽  
Quality Management System ◽  
New Products ◽  
Heavy Duty ◽  
Climatic Chamber ◽  
High Quality ◽  
University Of Technology ◽  
The Impact

One of the important aspects in the implementation of new products for production in the open field is the assessment of the impact of environmental conditions on their operation. Typically thermo-climatic research is carried out for such project. The laboratory of Techno-climatic Research and Heavy Duty Machines of Cracow University of Technology, equipped with a large-sized thermo-climatic chamber conducts this type of research. Bearing in mind the assurance of high quality of the conducted research, the quality management system (QMS) was developed and implemented. The article describes the requirements, scope and process of obtaining a Polish Centre for Accreditation (PCA) certificate.

Sign in / Sign up

Export Citation Format

Share Document