Numerical control (NC) polishing method for molded arc vane air inlet/outlet side
A technology for exhaust edges and blades, which is applied in the direction of grinding/polishing equipment, grinding machines, metal processing equipment, etc., can solve problems such as poor consistency, high technical and experience requirements for workers, and low efficiency, so as to improve efficiency and precision, and realize Mechanization and automation, the effect of surface quality stability
Inactive Publication Date: 2011-11-16
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
However, the removal amount in the manual polishing process is uneven, the shape accuracy of the inlet / exhaust edge is difficult to control, the processing consistency is poor, the requirements for workers' technology and experience are high, and the efficiency is low, which often affects the manufacturing cycle of the entire blade; in addition, it is now widely used The CNC machining method of the whole blisk, the traditional manual polishing method is difficult to integrate into the CNC system
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Embodiment Construction
[0017] Describe the present invention below in conjunction with specific embodiment:
[0018] In this embodiment, the air intake edge of a certain type of aero-engine shaped arc blade is polished.
[0019] First process the slotting knife: from the engine arc blade design drawing, the arc radius of the blade inlet edge is r; use the wire cutting method to process the slotting knife of the polishing wheel groove, and the front end section of the slotting knife is Semi-circle, the radius of the semi-circle is the same as the arc radius of the air inlet side of the blade, the machining accuracy is ±0.01mm, and the thickness of the slotting knife is 3-10mm.
[0020] Secondly, process the polishing wheel groove: select a polishing wheel with a radius of R, use the slotting knife obtained from the above processing to process a circle of polishing wheel grooves on the polishing wheel, the depth of the groove is equal to the arc radius r of the blade inlet edge , the processing accur...
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The invention provides a numerical control (NC) polishing method for a molded arc vane air inlet / outlet side, which comprises the steps of: firstly machining a grooving cutter according to a size of the air inlet / outlet side; machining polishing wheel shaped grooves on a polishing wheel by using the machined grooving cutter; correspondingly controlling in a NC system; and finishing NC polishing of the molded arc vane air inlet / outlet side under the driving of a power head in the NC system. The method disclosed by the invention is simple to operate and is easy to realize, and the mechanizationand the automation during the process of polishing are realized, so that the surface quality of the air inlet / outlet side is stable, meanwhile the polishing efficiency and accuracy are greatly improved; and the method can not only be used for polishing a common arc-shaped vane air inlet / outlet side, but also be used for polishing arc-shaped vane air inlet / outlet sides of a whole vane disc.
Description
technical field [0001] The invention relates to the field of mechanical processing of engine blades, in particular to a numerical control polishing method for forming arc blade inlet / exhaust edges. Background technique [0002] The processing quality of blades has an important influence on the reliability of aero-engines such as gas turbine engines. Usually, the working life of the engine depends on the performance of the blades. It has very important significance, its surface quality directly affects the aerodynamic performance of the blade, and then affects the performance of the aero-engine. Since abrasive flow polishing and mechanical vibration polishing are likely to cause damage to the blade inlet / exhaust edge and affect the aerodynamic performance of the blade or the overall blisk blade, the current polishing method for the blade inlet / exhaust edge is mainly manual polishing. The sandpaper or abrasive belt is bent so that the bent part is attached to the inlet and ou...
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IPC IPC(8): B24B1/00B24B19/14
Inventor 蔺小军史耀耀张军锋段继豪任军学李小彪杨阔董婷
Owner NORTHWESTERN POLYTECHNICAL UNIV