Improvement of steel barrel barrel edge grinding tool
Shanghai Xugong Coating Technology Co., Ltd. Xu Guoxing
Steel barrel barrels are generally required to be cut and edging before seam welding, which is called shearing.
Shearing is the first process of making steel barrels. The quality of cutting mushrooms directly affects the quality of seam welding of steel barrels, which in turn affects the overall quality of finished steel drums.
Most of the barrels Jo are generally edging using a medium-hardness hard grinding wheel with a relatively large grain shade. s, while grinding with a hard noisy wheel, the rotation speed of the grinding wheel is very high, its nature is hard and brittle: listen to the surface quality of the grinding wheel, such as the variety, thickness, hardness of the sand and the uniform distribution of the sand, etc. Both have a great influence on the quality of the edging. According to the grinding wheel factory-technician, there is still a problem of the life of the adhesive in the domestic hard grinding wheel. Generally, after one year, the problem of gradually decreasing the adhesion of the sand particles is likely to occur. From the production, storage, sales, to the user's hands, plus a period of storage, it takes several months. Especially in the case of oversupply of products, the inventory backlog is large, and the time difference between the grinding wheel and the user's hands may be calculated in years. Therefore, the quality of the hard grinding wheel is limited by time.
The installation quality of the hard grinding wheel, such as the position, balance, and the adjustment of the feed amount, also have a great influence on the quality of the edging of the steel drum. If the grinding wheel is improperly installed and the quality of the grinding wheel is problematic, the grinding wheel may rupture and fly out, causing a major accident. In the case of edging, if the vibration is caused by poor balance of the grinding wheel, the surface of the steel plate will be damaged.
The outer edge of the hard grinding wheel is a circular plane whose projection is a rectangle. 'When grinding the barrel steel plate, due to the high-speed rotation and sudden hard contact of the grinding wheel, the ten corners of the steel plate are easy to be rounded by the grinding wheel, which will cause the steel barrel weld and the top and bottom winding triangle. The strength of the crimp and the sealing problem. And sometimes steel drum steel plates are too thin, even ground. Therefore, before the hard grinding wheel is used, some barrel factories first trim the side of the outer circumferential plane of the outer edge into a bevel, so that its projection becomes a partial trapezoid: then, the obtuse angle of the trapezoid is modified into a rounded corner with a certain radius of curvature. . This result only reduces the above phenomenon or slightly improves the quality of the steel plate grinding, but does not prevent the browning, excessive thinning and grinding phenomenon on the surface of the polished steel plate. These phenomena seriously affect the quality of the weld.
In addition, the passivation of the hard grinding wheel is also a more troublesome problem. During the grinding process, the sharp sand will gradually be blunt and the degree of doubt will decrease. This results in a reduction in the grinding ability. As the degree of passivation increases, the surface of the grinding wheel is originally sharp and the "canyon" between the "peak" and the "peak" is gradually filled and blocked. The difference between the "peak" and the "bottom" gradually decreases, causing the grinding debris to be difficult to remove. Thus, the grinding ability is gradually reduced, and the friction between the sand and the surface of the steel plate is greatly increased, thereby causing the surface of the steel plate to heat up. Coking. Theoretically speaking, the grinding wheel has its own self-sharpness, but due to the clogging phenomenon of the “canyon†between the sands during the passivation process of the grinding wheel, the self-sharpening phenomenon of the grinding wheel is not reflected in the actual process. In this case, the grinding wheel has to be trimmed frequently. However, due to the fact that most of the scale buckets are now 1-. Both are produced by the assembly line, so the dressing wheel will cause the entire assembly line to stop production. In addition, the grinding wheel is noisy during the grinding process, and the dust is flying seriously. Usually, the feed rate needs to be adjusted frequently.
Therefore, how to improve the traditional edging tool of steel drum steel plate has become one of the subjects of many barrel factory technical reforms.
In fact, this topic has been solved. It is to replace the traditional hard grinding wheel with a "flexible grinding wheel". This kind of "flexible grinding wheel" is actually inserting a large number of flexible sand sheets with certain elasticity in the steel flange. The center of the flange is like a hard grinding wheel with a circular hole of a certain diameter for fixing on the rotating shaft. The insertion direction of the sand piece is at an angle to the diameter of the disk. In this way, when the sand grinds the steel plate, it forms a certain "bow elastic"! The design technique makes the sand substrate blunt when the sand is blunt, and the sand substrate is also worn at the same time. With the wear of the sand, the "bow elastic" and Under the combined action of the centrifugal force, the "bow" radius of the sand piece gradually becomes larger, so the sand piece is still firmly adhered to the steel plate for grinding, no need to trim at all, and it is not necessary to adjust the position of the "flexible grinding wheel".
The bonding of the sand particles on the “flexible grinding wheel†sand to the substrate uses a new generation of high-strength sand binder to ensure the bonding life of the sand.
During the use, the “flexible grinding wheel†has no unsafe factors such as fragmentation and flying out. Moreover, since the contact between the "flexible grinding wheel" and the steel plate is "flexible", the noise is greatly reduced, and the phenomenon of dust flying is also improved.
This kind of "flexible grinding wheel" for grinding steel drum steel plate has been used by many barrel factories for many years. It has been proved that the use of "flexible grinding wheel" greatly improves the grinding quality of steel drum steel plate. During the grinding process, the front corners of the barrel plate completely eliminate the rounded corners, and the too thin and the phenomenon of being scorched are also eliminated, so that the manufacturing quality of the steel drum has a new guarantee.
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