High-efficient cutting and finish-milling process for titanium alloy blade overall length
A titanium alloy and blade technology, which is applied in the field of high-efficiency cutting and fine milling of titanium alloy blades, can solve the problems of blade vibration and deformation, vibration marks on the processed surface, and scrapped blades, so as to improve efficiency, improve processing efficiency, and improve the processing surface. The effect of quality improvement
Active Publication Date: 2018-08-17
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
In the last step of the total length finish milling process, since the blade is only held by the blade root, the blade is in a cantilever state, and the wall thickness of the blade body is very thin, the blade is prone to vibration and deformation during the process of fine milling the top surface of the blade, which makes the processing Vibration patterns occur on the surface, which deteriorates the quality of the processed surface and even causes scrapping of the blade
In order to ensure the precision of the total length finish milling, the industry adopts the method of sacrificing efficiency for precision, and processes with a small cutting amount, which increases the processing cost of the blade
Method used
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Embodiment 1
[0023] Such as figure 1 As shown, the steps of this embodiment are as follows:
[0024] Step 1) Helical milling hole: After the finishing milling process of the previous one is completed, keep the blade crown straps under the tightening action of the top of the auxiliary rotating shaft without changing, use The corrugated milling cutter uses the spiral milling process to make a central hole with a diameter of 9mm in the middle of the blade crown, and makes the minimum value (that is, the minimum margin) of the outer circle of the hole from the top surface of the finished leaf to be 0.3mm, and then Lift the knife. The process parameters of helical milling hole are: line speed v c =60~90m / min, axial feed per tooth f az =0.003~0.01mm / z, tangential feed per tooth f tz =0.04~0.08mm / z.
[0025] Step 2) Milling out the gas side groove: continue with the previous step, use The corrugated milling cutter is lowered from the center hole, and then the cutter moves to the direction...
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The invention relates to a high-efficient cutting and finish-milling process for a titanium alloy blade overall length. The high-efficient cutting and finish-milling process for the titanium alloy blade overall length comprises the steps of spirally milling a hole in the middle of a blade; sequentially milling an air outlet side slot and an air outlet side slot in two sides of the milled hole; reserving reinforced belts for providing rigid supports for the blade at air inlet and outlet side parts; and then cutting the reinforced belts on two sides and finish-milling blade top surface areas ontwo sides, so that the blade overall length is finish-machined. According to the high-efficient cutting and finish-milling process for the titanium alloy blade overall length provided by the invention, through a manner of slotting in the middle and reserving the reinforced belts, the cutting and finish-milling efficiency of blade parts overall length are greatly improved, the blade top surface machining surface quality and the blade overall length size accuracy are ensured, and the production cost is reduced.
Description
technical field [0001] The invention relates to a technology in the field of aircraft manufacturing, in particular to a high-efficiency cutting and fine milling process for the total length of titanium alloy blades. Background technique [0002] Blade parts are key components in various turbomachinery such as aero-engines, steam turbines, gas turbines, etc., and are the core structural parts to realize the conversion of internal energy and mechanical energy. For the manufacture of blades, the method of five-axis CNC machining is widely used at home and abroad. For the machining of short and medium-length moving blades, the process is usually: first process the blade root on a four-axis machine tool; then clamp the blade on the main rotating shaft of a five-axis blade special machine tool through the blade root, and make the secondary rotating shaft The apex supports the technical support of the blade crown to play the role of auxiliary support, and then processes the airfoi...
Claims
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IPC IPC(8): B23P15/04
CPCB23P15/04
Inventor 陈明明伟伟安庆龙刘公雨
Owner SHANGHAI JIAO TONG UNIV