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Maintenance of sand belt machine

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With the deepening of reform and opening up and the rapid development of industrial technology, belt grinding with high efficiency, high economy and wide range of application is more and more attention by wood processing industry, many enterprises are using or preparing to use this advanced processing technology in order to improve the quality and grade of products. Due to the application of belt grinding and the research in our country is still in its infancy, so the knowledge about abrasive belt use on domestic literature introduction is not much, as a manufacturer of abrasive belt, when we are in the reception and visiting users often feel some users of abrasive belt storage and use of knowledge is not very understanding. In order to better serve the users, make the sand belt in the use of state, play the advantage of the sand belt grinding, the storage and use of some knowledge is introduced to you.

The storage of sand belt is very key to the use of sand belt, especially the impact of wide sand belt. Only the ideal storage condition and reasonable storage method can ensure that the sand belt is used in the proper state.

1, temperature, humidity requirements sand belt should not be stored in the temperature and humidity of large changes in the place, the ideal temperature is: 18-220C; The ideal humidity is 40-65%, too high temperature will make the binder aging, reduce the service life of sand belt. Synthetic fiber matrix sand belt (such as polyester cloth sand belt) is sensitive to cold, can not be stored in cold warehouse. Too high or too low humidity will cause deformation of sand belt, and deformation will reduce the bonding strength of sand belt. Especially the influence of excessive humidity on sand belt is more serious. In addition to the water-resistant sand belt, the general sand belt is prone to break, wrinkle and other phenomena and scrap the sand belt. In addition, the grinding material is easy to adhere to the surface of the sand belt during the grinding of damp sand belt, which reduces the service life of the sand belt. High temperature and low humidity have a great influence on the paper sand belt, which makes the paper sand belt brittle and easy to break and scrap when used.

2, storage storage sand belt warehouse should be cool, dry, ventilated; The sand belt should be placed on the goods rack, not on the ground; The goods rack should not only keep a distance of 200-500mm from the ground and walls, but also avoid being close to heat dissipation and drainage devices. Do not open the packing case for unused sand belts. Do not pile heavy objects on the packing case to avoid creases and cracks on the packing case.

Storage of sand belt is important, but if the sand belt can not be treated correctly before use, it will seriously affect its performance.

1, the suspension of sand belt sand belt should be suspended for at least 2-5 days before use, its purpose is to eliminate the crimping caused by packaging. Hang the unpacked sand belt on a 100-200mm diameter pipe or a special sand belt support frame. The length of the pipe should be greater than the width of the sand belt, otherwise the sand belt is easy to fall off or produce a trumpet mouth; Pipe should be horizontal, otherwise it is easy to damage the edge of sand belt. The ambient temperature and humidity of the hanging sand belt should conform to the storage conditions of the sand belt. The simple way is to use several 40W or 64W bulbs to keep dry in a sealed room.

2, appearance inspection After hanging sand belt before use should do the necessary appearance quality inspection, check whether the sand belt joint is smooth, firm; Whether the surface of the sand belt is broken, sand group, lack of sand, glue spot, wrinkle; Whether the edge of sand belt is neat and there is no crack. If there is a small crack at the edge, it will not affect the use after cutting (cutting into a circular arc). The quality of the workpiece can be guaranteed only when the abrasive belt is properly selected and used, and various problems in the use of abrasive belt can be solved correctly, and the superiority of abrasive belt grinding and grinding performance of abrasive belt can be brought into play.

1. Principles of use:

(1) Reasonable selection of sand belt type different processing workpiece material, different processing workpiece shape selection of sand belt type is not the same, the selection of sand belt type mainly from the matrix material, abrasive material, binder type and sand belt joint mode four aspects to choose. The knowledge about this aspect has been reported many times in domestic literature, and this paper will not introduce it here.

(2) Select the appropriate particle size only select the appropriate sand belt particle size, to ensure the surface quality of the processed workpiece and improve the service life of the sand belt. If the sand belt size is too small, the surface quality of the workpiece can not be guaranteed; If the size of the sand belt is too large, the sand belt is easy to wrinkle and fracture in use, so that the service life of the sand belt is reduced.

(3) The degree of multi-belt grinding process to select a workpiece if the multi-belt grinding process, the particle size of the rear belt can only jump over two particle sizes compared with the previous road, only in this way, can play the efficiency of belt grinding, in order to ensure the shape and size of the processed workpiece and the surface quality of the processed workpiece.

(4) There are two processes: the distribution ratio of front and back grinding is 85/15; Three processes: front and back distribution ratio 65/25/10; Four processes: front and back distribution ratio 50/30/12/8

(5) Selection of running direction of sand belt When using lap sand belt, it is necessary to make the running direction of sand belt consistent with the direction marked on the back of the sand belt, otherwise the sand belt is prone to premature fracture in the use process, and affect the surface quality of the processed workpiece. When using butt sand belt, the direction of sand belt operation can be ignored.

2. The common problems and solutions in belt grinding can only be solved when the abrasive particles of belt are basically blunt and the belt loses its grinding performance. However, in the actual grinding process of abrasive belt, due to the poor quality of abrasive belt, workpiece quality, equipment problems and improper operation and other reasons, will also cause the scrap of abrasive belt when the abrasive particle is not blunt.

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