Speeding up fine grinding of sintered corundum

Refractories ◽  
1968 ◽  
Vol 9 (11-12) ◽  
pp. 741-742 ◽  
Author(s):  
G. V. Kukolev ◽  
I. Ya. Piven' ◽  
V. M. Martynova ◽  
D. B. Mink'ov ◽  
A. S. Yudina ◽  
...  
Keyword(s):  
Fine Grinding ◽  
Sintered Corundum

scholarly journals Potentials of Vitrified and Elastic Bonded Fine Grinding Worms in Continuous Generating Gear Grinding

2021 ◽  
Vol 5 (1) ◽  
pp. 4
Author(s):  
Maximilian Schrank ◽  
Jens Brimmers ◽  
Thomas Bergs
Keyword(s):  
High Performance ◽  
Manufacturing Processes ◽  
Fine Grinding ◽  
Gear Grinding ◽  
Profile Line ◽  
Grinding Tool ◽  
Process Behavior ◽  
Hard Finishing ◽  
Tooth Flank ◽  
Process Strategy

Continuous generating gear grinding with vitrified grinding worms is an established process for the hard finishing of gears for high-performance transmissions. Due to the increasing requirements for gears in terms of power density, the required surface roughness is continuously decreasing. In order to meet the required tooth flank roughness, common manufacturing processes are polish grinding with elastic bonded grinding tools and fine grinding with vitrified grinding tools. The process behavior and potential of the different bonds for producing super fine surfaces in generating gear grinding have not been sufficiently scientifically investigated yet. Therefore, the objective of this report is to evaluate these potentials. Part of the investigations are the generating gear grinding process with elastic bonded, as well as vitrified grinding worms with comparable grit sizes. The potential of the different tool specifications is empirically investigated independent of the grain size, focusing on the influence of the bond. One result of the investigations was that the tooth flank roughness could be reduced to nearly the same values with the polish and the fine grinding tool. Furthermore, a dependence of the roughness on the selected grinding parameters could not be determined. However, it was found out that the profile line after polish grinding is significantly dependent on the process strategy used.

Effects of Two-Step DC Electrochemical Pretreatment of Fine Grinding WC-Co Tool Surface on Morphology and Quality of Diamond Coatings

2011 ◽  
Vol 337 ◽  
pp. 59-62
Author(s):  
Xiang Hui Zhang ◽  
Ling Wang ◽  
Jian Ping Long
Keyword(s):  
Surface Morphology ◽  
Direct Current ◽  
Arc Discharge ◽  
Etching Time ◽  
Diamond Coating ◽  
Diamond Coatings ◽  
Fine Grinding ◽  
Electrolytic Etching ◽  
Electrochemical Pretreatment

In the present investigation, diamond coating was deposited on fine grinding cemented carbide substrate by direct current arc discharge chemical vapor deposition. The effect of electrolytic etching time in the two-step electrochemical pretreatment process (firstly using electrolytic etching, and then using acid etching) on morphology and quality of the diamond coating were systemically studied. The surface morphology feature and quality of diamond coatings were characterized by means of Scanning Electron Microscope (SEM), laser Raman spectrometer respectively. The results showed that the electrolytic etching duration has distinctly effect on the quality and crystal features such as morphology, crystal type and grain size of diamond coating. It showed that as electrolytic current is direct current 3A, electrolytic etching time altering from 0.5 min to 7.5min, the surface morphology of diamond films gradually transition from microcrystalline cubic-octahedron to cauliflower type nanocluster, and further increase the electrolytic etching time, will lead to several negative effects on the quality and nucleation of the coatings which is not only retard the diamond nucleation, but also promote the formation of graphite.

STUDYING OF ACTIVITY OF INHIBITORS OF PROTEOLYTIC ENZYMES IN PRODUCTS OF PROCESSING OF GRAIN HARICOT (PHASEOLUS VULGARIS)

2018 ◽  
Author(s):  
Н.Т. ШАМКОВА ◽  
А.М. АБДУЛХАМИД
Keyword(s):  
Phaseolus Vulgaris ◽  
Liquid Medium ◽  
Proteolytic Enzymes ◽  
Trypsin Inhibitors ◽  
Milk Whey ◽  
Fine Grinding ◽  
Bean Flour ◽  
Wide Range ◽  
Mashed Potatoes

Определено содержание ингибиторов протеолитических ферментов в фасолевой муке, в пюре из зерновой фасоли, сваренной в воде, и в пюре из зерновой фасоли, сваренной после замачивания в воде в молочной сыворотке. Обосновано использование молочной сыворотки в качестве жидкой среды для варки зерновой фасоли после замачивания. Разработана технология полуфабриката в виде фасолевого пюре, предусматривающая замачивание фасоли в воде, варку в молочной сыворотке, грубое измельчение доведенной до готовности фасоли, последующее тонкое измельчение и охлаждение. Установлено, что в фасолевом пюре активность ингибиторов трипсина значительно ниже, чем в муке из фасоли, что делает пюре более предпочтительным полуфабрикатом для производства широкого ассортимента кулинарной продукции. The content of inhibitors of proteolytic enzymes in bean flour, in puree from beans harvested in water and in puree from cereal beans welded in milk whey after soaking in water is determined. The use of whey as a liquid medium for cooking grain beans after soaking is substantiated. The technology of semi-finished product in the form of bean puree, providing for soaking beans in water, cooking in milk whey, coarse grinding of the bean brought to the ready, subsequent fine grinding and cooling is developed. It has been found that the activity of trypsin inhibitors in bean puree is much lower than in bean flour, which makes mashed potatoes a more preferred semi-finished product for the production of a wide range of culinary products.

scholarly journals The Fine Grinding of the Vulcanized Rubber Using the Vulcanization Method in Internal Mixers

2004 ◽  
Vol 77 (6) ◽  
pp. 200-206
Author(s):  
Michiharu TOH ◽  
Kazumasa YOSHIKAI ◽  
Seiko HIMENO
Keyword(s):  
Fine Grinding ◽  
Vulcanized Rubber

An assembly for fine grinding of chemical agents for plant protection

1980 ◽  
Vol 16 (8) ◽  
pp. 457-458
Author(s):  
P. F. Valuiskii ◽  
F. I. Lyashko ◽  
V. N. Lebedev
Keyword(s):  
Plant Protection ◽  
Fine Grinding ◽  
Chemical Agents
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