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Worm reducer worm reducer often asks and causes various kinds of quality problems that may be generated in the worm reducer. The reason is inseparable from the design quality processing quality and assembly quality. From this aspect, the worm reducer is often asked. Analysis and formation of the overall structure of this article Wang Jinlin Hangzhou Wanjie Reducer Co., Ltd. summed up the company's 15 years of experience in the professional design and manufacture of worm reducer, collecting and accumulating user feedback on the use of quality information and after-sales service, after finishing, Specially analyze the causes of the worm reducer and the causes, and put forward some corresponding solutions for users and peers to enhance the technical exchanges in the industry. Promote the development of the transmission industry.
The worm reducer is a kind of gear with large structure and large transmission ratio, and has reliable self-locking function under certain conditions. It is also the most commonly used reducer. It has more than ten characteristics, and the production workers are mature. A large amount of commonly used machinery.
Worm reducers occur in production and use, and are more common. In order to improve the transmission efficiency, non-ferrous metals are used as the worm gear, and the worm is made of hard steel. Because it is a sliding friction transmission, it will generate high heat due to sliding friction, and generate noise, which also has certain requirements for lubricating oil. In many of its problems, from the point of view of use, the first is the heat leakage and noise, and the reasons for these problems are various, such as the precision of the equipment in the process of manufacturing the manufacturing process and the assembly. Precision, etc. In addition, it is also related to the viscosity of the material oil, and it is related to the use environment. As for the heat, the main reason is that the material is reasonable. It is the quality of the meshing surface. In terms of material, the worm wheel is an ideal choice for tin bronze, but it is limited by objective conditions, and the price is higher, and the strength is worse than that of aluminum bronze.
The paired worm material is hardened to 45555 with 45 steel, and is also commonly used for 40. After hardening, it is ground by a worm grinder to a roughness of 58. It is no longer polished because of cost. Therefore, the microscopic right worm is like a hardened boring tool. When paired, the copper worm gear is continuously smashed, which generates a large amount of heat. The chain reaction is caused by leakage. Because of the difference in the amount of thermal expansion between the parts and the seals between the parts and the seals due to the uneven heat distribution and the difference in the material of the parts, it is easy to create a leak gap in each mating surface, so that the internal heat expansion The thinning oil leaked out. Noise is the source of vibration of the worm gear pair. Therefore, it is better to solve the machining accuracy of these problems, and to improve the lubricating oil of the meshing surface as much as possible. It is necessary to rationally design the oil circuit to make it smooth, so that the oil can be on the meshing surface. Smoothly enter the meshing area. The specific method is to process the oil culvert on both sides of the top of the worm wheel, and after the hobbing of the worm wheel, the position of the large hob or the moving hob and the angle of the tool holder are used to cut the worm wheel into the entrance and the door, and 4 Add the radius of the top circle of the worm wheel.
The assembly quality of the worm gear reducer can not be underestimated for the heat generation, oil leakage and noise of the reducer. Especially for oil leakage, whether the sealing surface of each bonding surface is uniform, whether the screws are tight, whether the sealing ring is installed, whether there is foreign matter dust, iron filings, etc., which are mixed on the bonding surface or embedded in the oil sealing lip, etc., are directly related to Whether the reducer will leak oil in the future. The sealing pad 8 is reasonable for apricot, and whether the gap is properly controlled will directly affect the heat and noise of the reducer. Therefore, the technical level of responsibility of the assembler is related to the final quality of the product.
The final test is mainly based on the test of the oil leakage test. The gas test itself is to test whether the installed reducer has a leak. This is not good, but when it is turned on, the oil in the tank is Under the action of heat, the oil is expanded, and the lubricating oil is diluted again. The gap between the bonding surfaces in the thermal deformation is inevitable, and leakage is inevitable.
In terms of design, there are also many places worth noting, such as the shape of the reducer, the arrangement of the heat dissipation ribs, the calculation of the heat balance, and the design of the oil circuit, æ±´, closely combined with the actual use and operating conditions of the reducer. For example, when the speed ratio is too large, it is necessary to consider whether the worm wheel can be brought into the worm gear when it is running, and good results will be obtained.
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