Selection of chemically stable and durable grades of polypropylene for chemical machine building

1967 ◽  
Vol 3 (2) ◽  
pp. 133-138
Author(s):  
K. A. Moskatov ◽  
L. F. Grigor'eva
Keyword(s):  
Machine Building ◽  
Chemical Machine ◽  
Chemical Machine Building ◽  
Selection Of

scholarly journals The Selection of Boron Nitride Circles for Grinding Saponite–Titanium Composites Using Non-Parametric Method

2020 ◽  
Vol 57 (6) ◽  
pp. 53-64
Author(s):  
N.M. Huliieva ◽  
D.O. Somov ◽  
V.V. Pasternak ◽  
L.M. Samchuk ◽  
T.I. Chetverzhuk
Keyword(s):  
Silicon Carbide ◽  
Boron Nitride ◽  
Parametric Method ◽  
Cubic Boron Nitride ◽  
Machine Building ◽  
Abrasive Tools ◽  
Different Grain Size ◽  
Processing Stability ◽  
Selection Of ◽  
Non Parametric

AbstractThe issue of grinding saponite–titanium composites has not been considered in the machine building industry yet. The reason is that the chips are stuck on the working surfaces of abrasive tools made of silicon carbide and electrocorundum. This is due to the high adhesive activity at operating cutting temperatures between the composite and traditional abrasives.The article aims at studying the grinding of saponite–titanium composites using abrasive tools in various cutting modes based on parametric and non-parametric statistical methods.To solve this problem, high porous wheels (HPW) made of cubic boron nitride CBN30 with 100 % concentration on a bond V (K27), a pore-forming KF40, varied grains: B76, B126, B151 (ISO 6106:2013) – and hardness: M and O (ISO 525:2013) were used to grind saponite–titanium composites. Additionally, the Norton wheels from green silicon carbide with a normal porosity 39C (46; 60) K8 VK and with different grain size were tested. Norton wheels provide reduction of roughness height by 1.4–1.5 times in comparison with boron nitride HPW. These are recommended for the finishing grinding stage and HPW CBN30 – the preliminary to reduce the thermal effects on composites. By processing stability, the Norton wheels with grain 46 rank first, and among boron nitride HPW – CBN30 B76 100 OV K27–KF40.

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