In the mid-1960s, the domestic coated abrasives entered a relatively fast development. The small and medium-sized sandpaper sandpaper factories in the country have mushroomed rapidly, and the exchanges within the industry have also developed rapidly to expand the enterprise. Scale, guarantee and improve the quality of products, increase the exchange in the industry, the detection and identification of the intrinsic quality of abrasive cloth sandpaper is mentioned on the agenda. At that time, several representative abrasive cloth factories in the country, including Shanghai Grinding Wheel Factory, Tianjin Abrasive Sandpaper Factory, Wuhan Abrasive Cloth Factory, Jinan Abrasive Cloth Factory, Chengdu Abrasive Cloth Factory, Beijing Dongsheng Abrasive Cloth Factory and Shenyang Abrasive Cloth Factory, were held in 1968, one of which was held. The main content of the project is to design and manufacture a China's “standard sandpaper sandpaper testing equipment†for the industry. The meeting decided to design and manufacture the prototype by our Wuhan abrasive cloth factory. After accepting this task, Director Guo Xiangxian and we have inspected the Shanghai Grinding Wheel Factory, Beijing Dongsheng Abrasive Cloth Factory, Tianjin Sand Cloth and Sandpaper Factory, and solicited their opinions. At that time, the more regular grinding machine was only one of the Shanghai Grinding Wheel Factory. The self-made equipment of Taiwan is worth learning. The testing methods of other factories were extremely simple at the time, and even the sand was faced with hand by hand, and the quality was judged by experience.
The basic principles of the design of the test machine are: 1. To ensure the absolute equality of the grinding area, a four-bar linkage mechanism is adopted for this purpose, so that the tested rod is always kept vertically falling; 2. It is necessary to ensure that the applied pressure is not affected by the equipment and the The deviation of the grinding result is caused by the weight of the test bar, and the weight is adjusted according to the balance design to ensure the minimum error in the grinding; 3. In order to imitate the randomness in the manual grinding, the test stick is designed. Swing during the grinding process (4.5mm) to eliminate the iron filings caused by static electricity during the grinding process; 4. Considering the speed of machine and hand, draw a circle on the grinding sample (diameter 104mm), the grinding disc is 320 rpm; 5. Considering the need of dry and wet grinding, the water supply, timing system and some related functions are designed and perfected. Wanguan Hardware & Electrical" target=_blank> machine grid Xiaobian for everyone
At the beginning of 1969, the design plan named “Coated Abrasive Tester†was officially released. After the basic approval, Zhengzhou Sanmao sent Hua Zenghe to be responsible for the later work of the project. During the meeting, Yang Jinsheng sent comrades to the Wuhan Abrasive Factory and Wang Jiahou to coordinate the progress of the project and revised the drawings repeatedly. In July of the same year, the first prototype of the "coated abrasive wear tester" was born in Wuhan.
At the end of 1969, the appraisal meeting of “coated abrasive wear tester†was held in Zhengzhou. The meeting heard the report on the design and manufacturing process of the wear-resistant tester in Wuhan Abrasives Factory. After careful discussion, the meeting decided to use the machine as the “standard testing equipment†for the abrasive cloth sandpaper industry.
In the summer of 1970, Hua Zenghe and Wang Jiahou spent two months in Pudong, Shanghai, organizing and processing 20 sets of “coated abrasive wear testersâ€, which were sent to pre-determined sand cloth factories across the country. use. A grinding pilot standard including grinding methods and related parameters was developed, and thereafter, the testing equipment was designated as the grinding test equipment specified in the mechanical industry standard JB2761-80.
In the next forty years, the wear tester has been manufactured by several manufacturers and has been changed a few times. The total effect is good, but there are some problems, such as the sampling method. Scientific, sample fixtures can also be simplified. At the inaugural meeting of the Standardized Technical Committee for Coated Abrasives in the mid-1980s, the equipment was upgraded. At that time, it was initially decided that the professor of Huazhong Institute of Technology and Wang Jiahou of Wuhan Abrasives Factory proposed specific upgrade opinions and design plans. The key point was to use the digital technology to observe and monitor the dynamic response of the products in the grinding process. Long delays in production. However, the plan was not implemented for various reasons. Wanguan Hardware & Electrical" target=_blank> machine grid Xiaobian for everyone
With the development of the industry and the continuous improvement of products, our industry has long been looking forward to the emergence of a new generation of testing equipment in the near future, with certain technological content, advanced operation methods, accurate grinding effects and exquisite The shape is presented to the world.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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