With the continuous deepening of reform and opening up and the rapid development of industrial technology, belt grinding with high efficiency, high economy and wide application range is receiving more and more attention from the wood processing industry. Many enterprises want to improve the quality and grade of products. The advanced processing technology of belt grinding is being used or ready to be used. Since the application and research of abrasive belt grinding is still in its infancy in China, the knowledge about the use of abrasive belts is not much introduced in the domestic literature. As the manufacturer of abrasive belts, we often receive and visit users. I feel that some users are not fully aware of the knowledge of the storage and use of abrasive belts. In order to better serve the users, the belt is in the best condition when it is used, and the advantages of abrasive belt grinding are exerted. Some knowledge about the storage and use of the belt is now introduced to everyone. 1 belt storage The storage of the abrasive belt is critical to the use of the abrasive belt and has a particularly large effect on the wide abrasive belt. Ideal storage conditions and reasonable storage methods ensure that the belt is used in the best condition. 1.1 Temperature and humidity requirements The abrasive belt should not be stored in a place where the temperature and humidity change greatly. The ideal temperature is: 18-220C; the ideal humidity is 40-65%. If the temperature is too high, the binder will age and reduce the service life of the belt. Synthetic fiber matrix belts (such as polyester cloth belts) are sensitive to cold and cannot be stored in cold warehouses. If the humidity is too high or too low, the belt will be deformed, and the deformation will reduce the bond strength of the belt. In particular, excessive humidity has a serious impact on the abrasive belt. In addition to water-resistant abrasive belts, the general belts are used after being damp, and they are prone to discounts, wrinkles, etc., and the belts are scrapped. In addition, the abrasive material is easily adhered to the surface of the abrasive belt when the wet abrasive belt is ground, reducing the service life of the abrasive belt. The high temperature and low humidity have a great influence on the paper-based abrasive belt, which makes the paper-based abrasive belt brittle and easy to break and scrap when used. 1.2 Storage The storage silo warehouse should be cool, dry and ventilated; the abrasive belt should be placed on the cargo rack and should not be placed on the ground; the cargo rack should be kept at a distance of 200-500mm from the ground and the wall, and at the same time avoid the heat dissipation. And drains; unused belts should not open the box as much as possible. Do not stack heavy objects on the belt packing box to avoid creases and cracks in the belt. 2 belt treatment before use Although the belt storage is important, if the belt is not properly treated before use, it will seriously affect its performance. 2.1 suspension of the belt The belt should be suspended for at least 2-5 days before use, the purpose of which is to eliminate the curl caused by the packaging. Hang the unpacked belt on a 100-200mm diameter pipe or a dedicated belt support. The length of the pipe should be greater than the width of the belt, otherwise the belt will fall off or produce a flare; the pipe should be horizontal, otherwise the edge of the belt will be damaged. The suspended belt should have its ambient temperature and humidity in accordance with the storage conditions of the belt. The easiest way is to keep it dry with a few 40W or 64W bulbs in a sealed room. 2.2 Visual inspection After the suspension, the sanding belt should be checked for proper appearance quality before use. Check whether the belt joint is flat and firm; whether there are holes, sand groups, sand, rubber spots and wrinkles on the surface of the belt; whether the edges of the belt are neat And if there is a crack, if there is a small crack in the edge, after cutting (cut into a circular arc) does not affect the use. 3 use of abrasive belt Only by rationally selecting and correctly using the abrasive belt, and correctly solving various problems in the use of the abrasive belt, and exerting the superiority of the abrasive belt grinding and the optimum grinding performance of the abrasive belt, the workpiece can be processed. quality. 3.1 Principles of use 3.1.1 Reasonably choose the belt model Different types of machined workpieces and different workpiece shapes are different. The choice of belt type is mainly from the material of the base, the material of the abrasive, the type of adhesive and the way of the belt joint. Choose from aspects. Knowledge on this aspect has been reported many times in the domestic literature, and this article will not be introduced here. 3.1.2 Choosing the right granularity Only by selecting the appropriate belt size can the surface quality of the workpiece be processed and the life of the belt be increased. If the selected belt size is too small, the surface quality of the machined workpiece cannot be guaranteed; if the size of the belt is too large, the belt will be easily wrinkled and broken during use, which will reduce the service life of the belt. 3.1.3 Du Duo selection of multi-channel abrasive belt grinding process If a workpiece is subjected to multiple belt grinding processes, the particle size of the belt used in the latter road can only jump over two grain sizes compared with the previous one. Only in this way can the belt grinding be highly efficient and the processing can be guaranteed. The shape and size of the workpiece and the surface quality of the workpiece. 3.1.4 Distribution of grinding amount in multi-pass belt grinding process Two processes: the distribution ratio of the front and rear roads is 85/15; Three processes: the distribution ratio of the front and rear roads is 65/25/10; Four processes: the distribution ratio of the front and rear roads is 50/30/12/8 3.1.5 Selection of the running direction of the belt When using the lap joint, the running direction of the belt should be consistent with the direction marked on the back of the belt. Otherwise, the belt will break prematurely during use and affect the surface quality of the machined workpiece. When using the butt belt, the running direction of the belt can be ignored. 3.2 Problems and solutions in sanding belt grinding Only when the abrasive grains of the abrasive belt are substantially blunt and the abrasive belt loses the grinding performance is the normal end of the life of the abrasive belt. However, in the actual abrasive belt grinding process, due to the poor quality of the abrasive belt, the poor quality of the workpiece, the problems of the equipment and the improper operation, the abrasive belt may be scrapped when the abrasive grains are not blunt. The typical problems and their main causes and solutions for abrasive belt grinding in the wood processing industry are shown in the table below. Super Micro Bubble Beauty Instrument,Rf Ems Beauty Instrument,Rf Beauty Instrument,Rf & Ems Beauty Instrument Foshan Liqia Hardware Products Co., Ltd. , https://www.liqiamei.com
Abrasive belt knowledge