The Experts below are selected from a list of 31443 Experts worldwide ranked by ideXlab platform
T. Siltari - One of the best experts on this subject based on the ideXlab platform.
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Stainless steel Cold Rolling with emulsion
Europace, 2004Co-Authors: B. Schmidt, Thomas Reichardt, K. M. Lange, G. Hauret, Frank Conrad, T. SiltariAbstract:Lubricants for Cold Rolling of stainless steel have a major influence on surface quality of the rolled products and productivity. Up to now only oils are used in Cold Rolling of bright annealed stainless steel in Sendzimir mills. The producers constantly try to optimise the efficiency of productivity of their facilities but Cold Rolling mills are very seldom used to full mechanical capacity. Therefore, the aim of this project research was to increase productivity of stainless steel Cold Rolling mills by use of new lubricants (neat oils and emulsions). In first laboratory tests a pre-selection of several different lubricants was performed. The tested emulsions have shown better lubrication or friction-reduction properties than conventional or improved neat oils. A first assortment of emulsions and neat oils was tested in pilot mills with different kinds of hot pickled strips (ferritic and austenitic material). Main target was the evaluation of the effectiveness of Rolling properties and influence on different Rolling parameters: Surface aspect (bright aspect [BA], haze, gloss, roughness, etc.) Reduction rates Rolling speed Correlation between forward slip and coiler tension. For a correct comparison of the resulting data, different trials with standard neat oils in industrial and pilot mills have been carried out. The comparability of the created standard Rolling schedules was proved. The results of the tests have shown good Rolling properties and bright aspects surfaces especially for two emulsions. One favoured was selected for further examinations and tests. In further laboratory trials with the selected emulsion different treatment procedures and care concepts were tested. Different filtration techniques were examined: Sieve filtration Membrane percolation Fleece filtration Pre-coat filtration. A concept for emulsion care and maintenance was developed and proved in laboratory and pilot test series with emulsions. The ageing behaviour of the selected emulsion has been effectively simulated in a fatigue test. Following parameters have been observed over the simulation period: chemical properties (pH, saponification number (SN), neutralisation number (NN)) physical properties (e.g. drop size, viscosity) chemical composition (metal content, oil content, oil composition). Based on these positive results an operational test on a Sendzimir Cold Rolling mill has been successfully performed. Several coils (ferritic and austenitic) were rolled with very good surface aspects. Finally an operational concept for the use of emulsion in stainless steel Cold Rolling has been developed. Conclusions The positive results generated by extensive pilot tests on Cold Rolling, ageing effects and emulsion maintenance and proved in industrial Cold Rolling tests are: Surface qualities of 2 B were generated by using emulsions for Rolling stainless steel. The best surface results were achieved for ferritic steels. The increase of productivity of about 20 - 25 % for 2 B -surfaces is possible, because of higher Rolling forces. These can be realized by higher heat capacity behaviour of emulsions. The result is a decrease reduced number of passes. Emulsions have very good cleaning properties. There are no dry residues after annealing. New Rolling schedules have to be created, especially regarding the changed forward and backward slip. The new construction of a Rolling mill circuits based on lubrication with emulsions or the adaptation of existing Rolling mill circuits for the usage of emulsions is possible. The achieved important results have fulfilled the expectations. Using emulsions in Cold Rolling mills increases efficiency of productivity by reaching higher reduction rates per pass. Surface qualities of class 2 B have been reached and qualities of 2 R (BA) are reachable in the future.
B. Schmidt - One of the best experts on this subject based on the ideXlab platform.
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Stainless steel Cold Rolling with emulsion
Europace, 2004Co-Authors: B. Schmidt, Thomas Reichardt, K. M. Lange, G. Hauret, Frank Conrad, T. SiltariAbstract:Lubricants for Cold Rolling of stainless steel have a major influence on surface quality of the rolled products and productivity. Up to now only oils are used in Cold Rolling of bright annealed stainless steel in Sendzimir mills. The producers constantly try to optimise the efficiency of productivity of their facilities but Cold Rolling mills are very seldom used to full mechanical capacity. Therefore, the aim of this project research was to increase productivity of stainless steel Cold Rolling mills by use of new lubricants (neat oils and emulsions). In first laboratory tests a pre-selection of several different lubricants was performed. The tested emulsions have shown better lubrication or friction-reduction properties than conventional or improved neat oils. A first assortment of emulsions and neat oils was tested in pilot mills with different kinds of hot pickled strips (ferritic and austenitic material). Main target was the evaluation of the effectiveness of Rolling properties and influence on different Rolling parameters: Surface aspect (bright aspect [BA], haze, gloss, roughness, etc.) Reduction rates Rolling speed Correlation between forward slip and coiler tension. For a correct comparison of the resulting data, different trials with standard neat oils in industrial and pilot mills have been carried out. The comparability of the created standard Rolling schedules was proved. The results of the tests have shown good Rolling properties and bright aspects surfaces especially for two emulsions. One favoured was selected for further examinations and tests. In further laboratory trials with the selected emulsion different treatment procedures and care concepts were tested. Different filtration techniques were examined: Sieve filtration Membrane percolation Fleece filtration Pre-coat filtration. A concept for emulsion care and maintenance was developed and proved in laboratory and pilot test series with emulsions. The ageing behaviour of the selected emulsion has been effectively simulated in a fatigue test. Following parameters have been observed over the simulation period: chemical properties (pH, saponification number (SN), neutralisation number (NN)) physical properties (e.g. drop size, viscosity) chemical composition (metal content, oil content, oil composition). Based on these positive results an operational test on a Sendzimir Cold Rolling mill has been successfully performed. Several coils (ferritic and austenitic) were rolled with very good surface aspects. Finally an operational concept for the use of emulsion in stainless steel Cold Rolling has been developed. Conclusions The positive results generated by extensive pilot tests on Cold Rolling, ageing effects and emulsion maintenance and proved in industrial Cold Rolling tests are: Surface qualities of 2 B were generated by using emulsions for Rolling stainless steel. The best surface results were achieved for ferritic steels. The increase of productivity of about 20 - 25 % for 2 B -surfaces is possible, because of higher Rolling forces. These can be realized by higher heat capacity behaviour of emulsions. The result is a decrease reduced number of passes. Emulsions have very good cleaning properties. There are no dry residues after annealing. New Rolling schedules have to be created, especially regarding the changed forward and backward slip. The new construction of a Rolling mill circuits based on lubrication with emulsions or the adaptation of existing Rolling mill circuits for the usage of emulsions is possible. The achieved important results have fulfilled the expectations. Using emulsions in Cold Rolling mills increases efficiency of productivity by reaching higher reduction rates per pass. Surface qualities of class 2 B have been reached and qualities of 2 R (BA) are reachable in the future.
Jianli Song - One of the best experts on this subject based on the ideXlab platform.
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Process Parameters in the Cold Rolling Forming of Threads
Cold Rolling Precision Forming of Shaft Parts, 2017Co-Authors: Jianli Song, Zhiqi LiuAbstract:Parameters of thread Cold Rolling forming process have been narrated, including calculation of the workpiece billet diameter, selection of the Rolling force, Rolling speed, and the feed rate, and determination of the minimum wall thickness criteria in Cold Rolling of hollow threads.
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Process Parameters in the Cold Rolling Forming of Spline
Cold Rolling Precision Forming of Shaft Parts, 2017Co-Authors: Jianli Song, Zhiqi LiuAbstract:Design methods of the spline Cold Rolling precision forming process parameters, such as the contact area of the spline shaft, Rolling force and Rolling moment, and the calculation of the Cold Rolling workpiece billet diameter have been illustrated and analyzed.
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Cold Rolling Precision Forming Equipments
Cold Rolling Precision Forming of Shaft Parts, 2017Co-Authors: Jianli Song, Zhiqi LiuAbstract:Design of the Cold Rolling forming machine and dies and measurement of the mechanical parameters of the Cold Rolling precision forming equipment have been described. Typical Cold Rolling forming equipment production enterprises, product properties, characteristics, and technique parameters have also been briefly introduced.
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Mechanics Analysis and Numerical Simulation on the Precise Forming Process of Spline Cold Rolling
Materials Science Forum, 2008Co-Authors: Jianli Song, Da Wei Zhang, Quan Gang ZhengAbstract:The forming process of spline Cold Rolling was analyzed. The unit average pressure, contact area and Rolling force in the Cold Rolling precision forming process were analyzed and solved. The mechanical and mathematical model has been set up on the basis of the analysis. The numerical simulation of spline Cold Rolling process was carried out. The results obtained by comparison of theoretical analysis, numerical simulation and experiment provide a theoretical basis for the study and application of spline Cold Rolling process.
Zhiqi Liu - One of the best experts on this subject based on the ideXlab platform.
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Process Parameters in the Cold Rolling Forming of Threads
Cold Rolling Precision Forming of Shaft Parts, 2017Co-Authors: Jianli Song, Zhiqi LiuAbstract:Parameters of thread Cold Rolling forming process have been narrated, including calculation of the workpiece billet diameter, selection of the Rolling force, Rolling speed, and the feed rate, and determination of the minimum wall thickness criteria in Cold Rolling of hollow threads.
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Process Parameters in the Cold Rolling Forming of Spline
Cold Rolling Precision Forming of Shaft Parts, 2017Co-Authors: Jianli Song, Zhiqi LiuAbstract:Design methods of the spline Cold Rolling precision forming process parameters, such as the contact area of the spline shaft, Rolling force and Rolling moment, and the calculation of the Cold Rolling workpiece billet diameter have been illustrated and analyzed.
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Cold Rolling Precision Forming Equipments
Cold Rolling Precision Forming of Shaft Parts, 2017Co-Authors: Jianli Song, Zhiqi LiuAbstract:Design of the Cold Rolling forming machine and dies and measurement of the mechanical parameters of the Cold Rolling precision forming equipment have been described. Typical Cold Rolling forming equipment production enterprises, product properties, characteristics, and technique parameters have also been briefly introduced.
Frank Conrad - One of the best experts on this subject based on the ideXlab platform.
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Stainless steel Cold Rolling with emulsion
Europace, 2004Co-Authors: B. Schmidt, Thomas Reichardt, K. M. Lange, G. Hauret, Frank Conrad, T. SiltariAbstract:Lubricants for Cold Rolling of stainless steel have a major influence on surface quality of the rolled products and productivity. Up to now only oils are used in Cold Rolling of bright annealed stainless steel in Sendzimir mills. The producers constantly try to optimise the efficiency of productivity of their facilities but Cold Rolling mills are very seldom used to full mechanical capacity. Therefore, the aim of this project research was to increase productivity of stainless steel Cold Rolling mills by use of new lubricants (neat oils and emulsions). In first laboratory tests a pre-selection of several different lubricants was performed. The tested emulsions have shown better lubrication or friction-reduction properties than conventional or improved neat oils. A first assortment of emulsions and neat oils was tested in pilot mills with different kinds of hot pickled strips (ferritic and austenitic material). Main target was the evaluation of the effectiveness of Rolling properties and influence on different Rolling parameters: Surface aspect (bright aspect [BA], haze, gloss, roughness, etc.) Reduction rates Rolling speed Correlation between forward slip and coiler tension. For a correct comparison of the resulting data, different trials with standard neat oils in industrial and pilot mills have been carried out. The comparability of the created standard Rolling schedules was proved. The results of the tests have shown good Rolling properties and bright aspects surfaces especially for two emulsions. One favoured was selected for further examinations and tests. In further laboratory trials with the selected emulsion different treatment procedures and care concepts were tested. Different filtration techniques were examined: Sieve filtration Membrane percolation Fleece filtration Pre-coat filtration. A concept for emulsion care and maintenance was developed and proved in laboratory and pilot test series with emulsions. The ageing behaviour of the selected emulsion has been effectively simulated in a fatigue test. Following parameters have been observed over the simulation period: chemical properties (pH, saponification number (SN), neutralisation number (NN)) physical properties (e.g. drop size, viscosity) chemical composition (metal content, oil content, oil composition). Based on these positive results an operational test on a Sendzimir Cold Rolling mill has been successfully performed. Several coils (ferritic and austenitic) were rolled with very good surface aspects. Finally an operational concept for the use of emulsion in stainless steel Cold Rolling has been developed. Conclusions The positive results generated by extensive pilot tests on Cold Rolling, ageing effects and emulsion maintenance and proved in industrial Cold Rolling tests are: Surface qualities of 2 B were generated by using emulsions for Rolling stainless steel. The best surface results were achieved for ferritic steels. The increase of productivity of about 20 - 25 % for 2 B -surfaces is possible, because of higher Rolling forces. These can be realized by higher heat capacity behaviour of emulsions. The result is a decrease reduced number of passes. Emulsions have very good cleaning properties. There are no dry residues after annealing. New Rolling schedules have to be created, especially regarding the changed forward and backward slip. The new construction of a Rolling mill circuits based on lubrication with emulsions or the adaptation of existing Rolling mill circuits for the usage of emulsions is possible. The achieved important results have fulfilled the expectations. Using emulsions in Cold Rolling mills increases efficiency of productivity by reaching higher reduction rates per pass. Surface qualities of class 2 B have been reached and qualities of 2 R (BA) are reachable in the future.
