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Coupler Pressing Machine The Use Of Temperature Assembly Is Very Appropriate

Jun 26, 2017

The assembly of the Coupler Pressing Machine on the shaft is one of the keys to the Coupler Pressing Machine installation. Coupler Pressing Machine and shaft with the interference of most of the interference fit, the connection is divided into key and keyless connection, Coupler Pressing Machine shaft hole is divided into cylindrical shaft has also been with the cone-shaped shaft hole in two forms. Assembly methods are static pressure method, power press method, temperature assembly method and hydraulic assembly method.

Static pressure method: This method is based on the size of the required press force when assembling, the use of clamps, jacks, manual or mobile presses, static pressure method is generally used for tapered shaft hole. As the static press method by the pressure of mechanical restrictions, in the larger interference, the application of a lot of force more difficult. At the same time, in the process of pressing will be cut between the Coupler Pressing Machine and the axis of the uneven surface of the uneven crest, so that the mating surface is damaged. Therefore, this method is generally not much application.

Power press method: This method refers to the use of impact tools or machinery to complete the assembly process, generally used for Coupler Pressing Machine between the Coupler Pressing Machine and the shaft is a transition or interference is not the occasion. The assembly site is usually beaten by hand hammer method, the method is in the wheel's end into the wood or other soft material for the buffer, relying on the impact of hand hammer, the Coupler Pressing Machine into the Coupler Pressing Machine. This method of cast iron, hardened steel, cast alloys and other brittle materials made of the Coupler Pressing Machine of the risk of local damage, should not be used. This method also damages the mating surface, so it is often used for assembly of low speed and small Coupler Pressing Machines.

Temperature difference assembly method: the heating method to make the Coupler Pressing Machine heat expansion or cooling method to shrink the shaft end, which can easily put the wheel Coupler Pressing Machine on the shaft. This method than the static press method, power press method has more advantages for the use of brittle materials made of the hub, the use of temperature assembly is very appropriate. Temperature assembly method used mostly heating method, the cooling method used less. There are many ways to heat, and some of the wheels into the high flash point of the oil for oil bath heating or torch baking, and some with the oven to heat the assembly site to use more oil bath heating and torch baking. Oil bath heating can reach the maximum temperature depends on the nature of the oil, generally below 200 degrees. When using other methods to heat the hub, you can make the Coupler Pressing Machine temperature is higher than 200 degrees, but from the perspective of metallographic and heat treatment, the heating temperature of the Coupler Pressing Machine can not be arbitrarily increased, the steel recrystallization temperature of 430 degrees, if heated Temperature of more than 430 degrees, will cause changes in the internal structure of steel, so the upper limit of heating temperature must be less than 430 degrees, for the sake of insurance, the heating temperature limit should be below 400 degrees. As for the actual heating temperature required for the Coupler Pressing Machine, according to the Coupler Pressing Machine with the axis of the interference value and the Coupler Pressing Machine after heating on the shaft set when the requirements of the calculation.

Check after assembly: After the Coupler Pressing Machine is completed on the shaft, the vertical and coaxial degrees of the Coupler Pressing Machine and the shaft should be carefully checked. Usually in the Coupler Pressing Machine of the end and the outer circle set up two dial indicator, turning the shaft when the shaft, observe the Coupler Pressing Machine of the whole beating (including the end of beating and radial run) values, determine the Coupler Pressing Machine and the shaft Of the degree of verticality and coaxiality of the situation. Different speed, different forms of Coupler Pressing Machine on the requirements of the whole beating different, the Coupler Pressing Machine in the shaft after the completion of the assembly, the Coupler Pressing Machine must be the total beating deviation in the design requirements within the tolerance range, which is the Coupler Pressing Machine One of the main quality requirements of the assembly. There are many reasons why the full jitter value of the Coupler Pressing Machine does not meet the requirements, first of all may be due to processing errors. For the field assembly, due to improper assembly of the key caused by the Coupler Pressing Machine shaft and shaft different axis. The correct installation of the key should be the key side of the key and the keyway wall close fit, usually in the assembly with color inspection, with a bad file or blade repair to meet the requirements.

High-speed rotating machinery for the Coupler Pressing Machine and the axis of the coaxial degree of high demand, with a single bond can not get a high degree of coaxial, with double-key Coupler Pressing Machine or spline connection can make the coaxial degree of both improved.