HHBB type electric chain hoist is a light and small lifting equipment, which has the advantages of compact structure, light weight, small volume, strong versatility of parts and convenient operation. The reducer adopts hard tooth surface transmission design, which has long service life and high mechanical efficiency. The motor adopts a conical rotor brake motor, with up and down two-way safety limit device. Electric hoists can be widely used to lift heavy objects or installed on single-girder cranes, straight and curved I-beams, and can also be used on double-girder hoists, hoist gantry cranes or cantilever cranes. They are ideal for industrial and mining enterprises, railways, docks, and warehouses. Commonly used lifting equipment.
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Hobbing has a certain speciality for its cutting motion, but it has something in common with the theory of dry machining and the cutting mechanism. The cutting theory includes: green cutting theory, softening theory of metal during cutting, low temperature brittleness and improved cutting cooling. The specific contents are as follows: (1) theoretical analysis of the cutting force when the cutting tool edge is worn and not worn; (2) the cause of the sawtooth chip; (3) the metal softening effect; (4) the roughness quality of the machined surface (5) MQL cooling lubrication effect. Around these theories and specific content, we can guide us to better refer to the quasi-dry machining to the hobbing process, so as to achieve good machining results, longer cutting tool life, and a clean machining environment.
In order to achieve good machining results, the general idea of ​​hobbing machining using quasi-dry cutting is to increase the cutting speed, shorten the contact time between the cutting tool and the workpiece, and let the chips take away a lot of cutting heat; And minimal lubrication technology. The idea is based on the fact that most of the cutting energy is converted into heat, which is expected to be carried away quickly by the chips, while the heat transferred to the cutting tool and the workpiece is minimized. In this way, it is advantageous to extend the life of the cutting tool and reduce the thermal expansion of the workpiece. In high-speed hobbing, even under ideal conditions, a small amount of cutting heat is absorbed by the cutting tool. In the current application, the cutting heat of the cutting tool is cooled by the compressed air, and the heat dissipation effect is obvious. Will achieve better processing results.
Micro-lubrication processing application for gear processing
Quasi-dry machining is a new type of machining that replaces traditional lubrication cooling with a small amount of lubrication. It has been applied in some enterprises. Under the condition of dry cutting, the cutting process is different from the traditional wet cutting. For example, the feed speed, cutting depth and cutting speed are different from the traditional cutting. The main performance is that the cutting edge of the cutting tool generally adopts a negative chamfering protection edge. The cutting principle involves a wider range of factors. At present, the theoretical basis of quasi-dry cutting is far less mature than the traditional metal cutting theory, and it is difficult to analyze the processing mechanism of quasi-dry cutting with a theory.