Manufacturing method of small sized turbine shaft

Abstract

This invention is a small type turbine axis manufacturing method. The turbine is welded with axis; stress is eliminated through heat treating. Weld zone is sanded, then tension test is done. Burr is done first and then axis is processed t needed length, and central hole is punched at end of axis. Outer circle and R slot are processed to needed dimension, then liquid penetrant test, Central hole and turbine outer circle are grinded, then turbine end face is processed to needed dimension, then each outer circle is processed to needed dimension. Penetration testing and high frequency hardening and alignment are done. Stress is eliminated through heat treating and central hole is grinded, turbine end face is grinded to needed dimension, then each outer circle on the axis is grinded. Screw thread is roll extruded, turbine outer circle is precise grinded. Turbine end face is grinded, then each outer circle on the axis is precise grinded, sealing slot is grinded, turbine meridian plane is grinded, burr is eliminated, then dynamic balancing experiment is done for testing.

Description

technical field [0001] The invention relates to a process method for machining a turbine shaft of a supercharger. In particular, it relates to a method of manufacturing small turbine shafts. Background technique [0002] There are 20 processes in the traditional turbine shaft processing, which are as follows: 1. Electron beam welding is used to weld the turbine and shaft together; 2. Heat treatment to eliminate stress; 3. Sanding the weld; 4. Tensile test; 5. Coloring Flaw detection; 6. Use the clamping ring and three claws to clamp the large outer circle of the turbine shaft, align the A surface of the turbine, turn the shaft to the required length, punch the center hole at the end of the shaft, and use the top center hole to roughly turn each The outer circle reaches the required size, then turn around and clamp, align the outer circle of B, polish the end face, and drill the center hole of the turbine end; 7, grind the center hole; 8, first turn the end face of the turbi...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned method for manufacturing the turbine shaft has the following disadvantages: 1. In the traditional process, the seal groove is processed by first turning the seal groove to a certain size, then grinding the end face of the turbine, and then using a shovel machine to shovel the seal groove. We know that the seal groove The groove has a high precision requirement relative to the turbine end face. This will cause the length dimension of the seal groove relative to the turbine end face to become uncertain due to the non-coincidence of the benchmarks after the two machinings and the tolerance of the seal groove relative to the turbine end face. The margins on both sides of the groove are unequal or deviate from the center of the groove, resulting in the seal groove being scrapped because it cannot be ground out. In addition, the speed of the shovel bed is low, and the grain size of the grinding wheel must be selected coarser (if a fine grinding wheel is selected, the grinding temperature of the end face of the groove of the part will be reduced. Rising and discoloration), so the roughness of the groove is often not guaranteed, and similarly, the shape and position tolerance of the groove cannot be guaranteed

Second, the thread processing in the 14th process in the traditional process mainly uses turning processing. On the one hand, the dimensional accuracy of the thread is limited by the level of the processor. For example, the grinding of the turning thread tool and the selection of cutting parameters directly affect the thread The dimensional accuracy, geometric tolerance accuracy, roughness, etc., and because of the different clamping and correction levels, the high verticality requirements of the thread cannot be guaranteed. As a result, when the whole machine is assembled, as long as the rotor nut is pressed, the turbine shaft will be The force bends, which causes the supercharger to rub and other phenomena, resulting in its failure to operate normally

3. After annealing, the outer circles of each gear on the shaft are only ground once, and the time is short, and the stress cannot be fully released, which affects the product quality.

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