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Wang S.,Henan Huanghe Whirlwind Co.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2015

Finite element analysis model for static analysis was established with Ansys. Stress distribution and deformation in working situation were analyzed. The models were then transfered into parametric models and imported into Ansys Workbench. Hinge sleeve was analyzed on its structure character and stress situation. To optimize the design, volume of parts and stress value at big stress sites was set as targets with major structure dimensions, such as bottom arc R, lug width H, as design variables. Results showed that R value directly influenced stress on the bottom. Bottom stress decreased as R increased. When R reached 70 mm bottom stress kept stable. Stress decreased as H increased, but the volume would increase accordingly. D and d had little influence on stress but their influence on volume could not be ignored. ©, 2015, Zhengzhou Institute of Abrasives Grinding. All right reserved. Source


Wang Y.-C.,Henan Huanghe Whirlwind Co.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2014

The impurities in a series of abrasive diamonds synthesized by using iron and nickel alloy as catalyst, ranging from low grade to high grade, were investigated by employing magnetic susceptibility tester, SEM/EDS and oxygen nitrogen analyzer. The results show that magnetic susceptibility of synthetic diamond is proportional to the mass ratio of the diamond ash and the diamond itself. The main impurities in the synthetic diamond are iron, nickel, magnesium, silicon, calcium, oxygen and nitrogen. With the decrease of the total amount of impurities in the diamond, all of the impurities except for nitrogen decrease, but share of silicon and calcium increase. This fact implies that there may be another way for silicon and calcium get into the diamond lattice in addition to accompanying metal inclusions. The higher the diamond grade the lower the oxygen mass fraction, while the nitrogen mass fraction shows no relationship with diamond grade. To further investigate the origin of impurities in the diamond, the graphite and catalyst used for synthesizing the diamond were analyzed, too. Using of high-purity graphite and catalyst may contribute to the synthesis of high purity diamond, but not necessarily the top diamond. Source


Wang Y.-C.,Henan Huanghe Whirlwind Co.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2013

The wear resistance of PCD is tested by sand blasting method. The new method uses a high-speed flow of SiC abrasive particles as the tool to wear the sample instead of SiC abrasive wheel in traditional method, and the mass loss of the sample in a given time or unit time is used to describe the wear resistance of the sample. In principle, as soon as the intensity of the abrasive flow is controlled tightly enough, the new method could provide reasonably accurate results. The influences of main parameters upon the testing result in the new method are investigated experimentally. The comparision experiments show that new method exhibited much higher accuracy than the abrasive wheel method. Source


Shao Y.-Q.,Ningbo Hanshang Hydraulic Co | Liu J.-S.,Henan Huanghe Whirlwind Co. | Zhou S.-J.,Ningbo Hanshang Hydraulic Co
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2013

As a new pressure supercharger, double-acting hydraulic supercharger has been used in the cubic press. The working principle of double-acting hydraulic supercharger was introduced. The application examples in the cubic press were analyzed. The results showed that double-acting hydraulic supercharger used in the cubic press has the advantages of smaller size, lighter mass, lower cost and more stable performance and lower noise compared with ordinary supercharger. In addition, there is no limit on super pressure time and it is convenient to control the pressure. Source


Liu J.-S.,Henan Huanghe Whirlwind Co. | Wang F.-S.,Henan Huanghe Whirlwind Co.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2012

Based on longtime study and application of the belt type press and cubic press, their properties in high temperature and ultra high pressure synthesis of diamond were analyzed. The results showed that higher pressure, uniform temperature and small shape change in cell are the properties of belt type press system, and the cubic press system has the properties of low production costs and high production efficiency. At last, the suitable field of these two devices, and the problems of these two devices in producing superhard abrasive materials under high temperature and ultra high pressure were discussed. Source

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