scholarly journals Analysis of temperature of single disk lapping machine

2018 ◽  
Vol 19 (12) ◽  
pp. 303-307
Author(s):  
Adam Barylski
Keyword(s):  
Experimental Research ◽  
Temperature Rise ◽  
Infrared Camera ◽  
Flat Surfaces ◽  
System Components ◽  
Single Disk ◽  
Lapping Machine

In the paper experimental research of flat surfaces lapping with single-disk lapping machine presented. The paper is an introduction to single-disk lapping machine executory system components temperature rise research. Experiments were being conducted during with use of ABRALAP 380 lapping machine and infrared camera.

Research on Tool Temperature Dependence on Lapping Grains Size

2013 ◽  
Vol 199 ◽  
pp. 159-164
Author(s):  
Justyna Molenda ◽  
Adam Charchalis ◽  
Adam Barylski
Keyword(s):  
Temperature Rise ◽  
Material Removal ◽  
Infrared Camera ◽  
Wheel Speed ◽  
Carbide Powder ◽  
Plate Temperature ◽  
Abrasive Grains ◽  
Testing Method ◽  
Valve Sealing ◽  
Lapping Machine

Commonly used as a finishing operation, lapping has been used for achieving ultra-high finishes and close tolerances between mating pieces. Its carried out by applying loose abrasive grains between work and lap surfaces, and causing a relative motion between them resulting in a finish of multi-directional lay. The grains activity (sliding and rolling) in the working gap causes not only the material removal but also the temperature rise of lap plate. This work presents the results of lapping plate temperature rise research. The investigation has been conducted to check the influence of grains size on. It was made during flat lapping with use of ABRALAP 380 lapping machine and infrared camera Thermo Gear G100. The lapping machine executory system consisted of three working conditioning rings. Plate temperature was measured during ceramic (Al2O3) elements lapping. The elements were valve sealing parts. After grinding they were processing with three abrasive grains sizes: F400/17, F800/6.5 and F1200/3. The abrasive mixture was boron carbide powder mixed with kerosene and machine oil with grain concentration 0.25. Other lapping parameters remained constant during process. The wheel speed was 60 rev/min and lapping pressure 0.04 MPa. In the next step the statistical analysis was conducted. It was analysed if the plate temperature is influenced by the grains size. A hypotheses testing method was use. Results were calculated for temperature rise values measured after 300 minutes of machine working. According to them the influence of abrasive grains size on plate temperature rise is statistically insignificant, what is not consisted with the model.

Microgrinding with Diamond Electroplated Tools and with Single-Disk Lapping Kinematics

2016 ◽  
Vol 831 ◽  
pp. 25-32
Author(s):  
Adam Barylski ◽  
Mariusz Deja
Keyword(s):  
Material Removal ◽  
Removal Rate ◽  
Pull Out ◽  
Ceramic Samples ◽  
Tool Surface ◽  
Single Disk ◽  
The Subject ◽  
Machine Configuration ◽  
Lapping Machine ◽  
Electroplated Tool

New tools for flat grinding are the subject of the paper. Electroplated diamond tools with different grains - D64 and D107 - were used in a modified single-disc lapping machine configuration. The results from flat grinding, such as the material removal rate (MMR), surface roughness and plane-parallelism are presented in the paper. Apart from ceramic samples, the additional experiments were carried out on cemented carbide workpieces (H10S) with the use of a diamond electroplated tool (D64). SEM microscopic images of unworn and worn active tool surface are presented with abrasive grains worn by attrition and cavities in the nickel bond after the grains pull out.

scholarly journals UAV-BORNE THERMAL IMAGING FOR FOREST HEALTH MONITORING: DETECTION OF DISEASE-INDUCED CANOPY TEMPERATURE INCREASE

2015 ◽  
Vol XL-3/W3 ◽  
pp. 349-354 ◽  
Author(s):  
M. Smigaj ◽  
R. Gaulton ◽  
S. L. Barr ◽  
J. C. Suárez
Keyword(s):  
Temperature Rise ◽  
Temperature Increase ◽  
Disease Onset ◽  
Forest Health ◽  
Significant Risk ◽  
Canopy Temperature ◽  
Infrared Camera ◽  
Major Influence ◽  
Data Set ◽  
Management Interventions

Climate change has a major influence on forest health and growth, by indirectly affecting the distribution and abundance of forest pathogens, as well as the severity of tree diseases. Temperature rise and changes in precipitation may also allow the ranges of some species to expand, resulting in the introduction of non-native invasive species, which pose a significant risk to forests worldwide. The detection and robust monitoring of affected forest stands is therefore crucial for allowing management interventions to reduce the spread of infections. <br><br> This paper investigates the use of a low-cost fixed-wing UAV-borne thermal system for monitoring disease-induced canopy temperature rise. Initially, camera calibration was performed revealing a significant overestimation (by over 1 K) of the temperature readings and a non-uniformity (exceeding 1 K) across the imagery. These effects have been minimised with a two-point calibration technique ensuring the offsets of mean image temperature readings from blackbody temperature did not exceed ± 0.23 K, whilst 95.4% of all the image pixels fell within ± 0.14 K (average) of mean temperature reading. <br><br> The derived calibration parameters were applied to a test data set of UAV-borne imagery acquired over a Scots pine stand, representing a range of Red Band Needle Blight infection levels. At canopy level, the comparison of tree crown temperature recorded by a UAV-borne infrared camera suggests a small temperature increase related to disease progression (R = 0.527, p = 0.001); indicating that UAV-borne cameras might be able to detect sub-degree temperature differences induced by disease onset.

Experimental Research on Minimum Quantity Lubrication Surface Grinding With Different Cooling and Lubrication Conditions

2021 ◽  
pp. 1052-1079
Author(s):  
Changhe Li ◽  
Hafiz Muhammad Ali
Keyword(s):  
Surface Roughness ◽  
Experimental Research ◽  
Temperature Rise ◽  
Minimum Quantity Lubrication ◽  
Environmentally Friendly ◽  
Grinding Force ◽  
Minimum Quantity ◽  
Urgent Task ◽  
Cooling And Lubrication ◽  
Lubrication Conditions

Given the increasing attention to environmental and health problems caused by machining, the development of an environmentally friendly grinding fluid has become an urgent task. The cooling and lubricating properties of different cooling and lubricating conditions were analyzed. The influence mechanism of nanofluids minimum quantity lubrication (NMQL) on cooling and lubricating effect was revealed with different nanoparticles (MoS2, CNT, ZrO2) and different volume concentrations of MoS2 nanofluids (1%, 2%, 3%). The experimental results showed that the temperature rise (258 °C) and grinding force (Fn=70 N, Ft=27 N) obtained under NMQL grinding were the closest to the flood grinding. The specific grinding energy of MoS2 nanofluids was the lowest, which was 47 J/mm3. When the volume concentration was 2%, the best cooling and lubricating effect was obtained. The surface roughness of the workpiece was the lowest (Ra = 0.283 μm; Rz = 0.424 μm).

scholarly journals Thermomechanical Modelling of a Steel Plate Impacted by a Shot and Experimental Validation

2006 ◽  
Vol 524-525 ◽  
pp. 167-172 ◽  
Author(s):  
Sébastien Rouquette ◽  
Emmanuelle Rouhaud ◽  
Hervé Pron ◽  
Manuel François ◽  
Christian Bissieux ◽  
...  
Keyword(s):  
Temperature Rise ◽  
Experimental Validation ◽  
Steel Plate ◽  
Numerical Study ◽  
Infrared Camera ◽  
Metallic Plate ◽  
Mechanical Problem ◽  
The Impact ◽  
Compressive Residual Stresses ◽  
Good Agreement

This work presents an experimental and numerical study of the thermo-mechanical problem of a steel plate impacted by a shot. The temperature rise is estimated and its effect on the compressive residual stress is analyzed. The simulations show that the value of the compressive residual stresses at the surface of the plate is modified when thermo-mechanical effects are included in the model as compared with simulation including hardening effects only. To validate this numerical study, an experimental device has been developed to measure the temperature rise after the impact. The experiment consists of the impact of a shot on a metallic plate. The temperature measurement is performed by an infrared camera located on the side of the plate opposite to the impact. Comparison between these experimental measurements and the numerical solution gives good agreement (to within 5%).

Computational Simulation and Experimental Research of Heating System for a Field Shower Equipment

2013 ◽  
Vol 291-294 ◽  
pp. 1756-1759
Author(s):  
Xi Bin Ma ◽  
Zhi Ming Dong ◽  
Rui Lin Gao ◽  
Gui Zhi Jia
Keyword(s):  
Experimental Research ◽  
Temperature Rise ◽  
Heating Temperature ◽  
Computational Simulation ◽  
Heating System ◽  
Cold Environment ◽  
Design Phase ◽  
Simulated Temperature ◽  
Schematic Design

Heating of a novel field shower equipment was computational simulated by CFD software in the schematic design phase, and the correction of simulation was verified in the environment laboratory. The results show that, the simulated temperature rise faster than the tested one. It took about 2 minutes earlier to arrive 25 °C, which is the design heating temperature for the shower equipment in cold environment. Since the simplification and assumption was used in the computational simulation, the simulation can reflect the objective situation.

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