Numerical control track machining method for deep cavity R-type valve seat profile of valve
A valve seat type and processing method technology, applied in the field of mechanical processing, can solve the problems of low surface roughness of the valve seat, uneven valve seat plane, and low processing efficiency, so as to shorten the production cycle, improve the surface roughness, and reduce the dependence on Effect
Active Publication Date: 2021-11-19
XIAN SPACE ENGINE CO LTD
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Problems solved by technology
[0003] In order to overcome the deficiencies in the prior art, the inventor has carried out dedicated research and provided a numerical control trajectory processing method for the R-shaped valve seat profile of the deep cavity of the valve , this method solves the problems of long preparation time, low processing efficiency, low surface roughness of the valve seat and uneven height of the valve seat plane in the forming process, effectively realizes the processing of the R-shaped valve seat surface that meets the design requirements, and improves the The processing efficiency and the processing quality of R type valve seat, thus complete the present invention
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Embodiment 1
[0046] (1) The valve body is processed according to the valve body drawing except for the valve seat profile to the size required by the design; the valve body valve seat profile structure and specific dimensions are as follows Figure 11 shown, and the valve seat is located at the valve body channel depth L=20mm. Roughly machine the valve seat profile into a ring boss with a face grooving knife (see image 3 ), where A=0.2mm, B=0.2mm, and H2=0.2mm.
[0047] (2) Using the end face grooving tool and using the numerical control trajectory programming method Figure 4 ), where R1=0.34mm, R2=0.3mm, R3=0.3mm, H3=0.04mm; the cutting parameters of the two cutting edges of the face grooving cutter are cutting speed v=20m / min, feed f=0.02mm , the amount of back knife ap=0.15mm; the axial tool setting deviation is not more than 0.007mm, and the radial tool setting deviation is not more than 0.005mm. M1=0.15, M2=0.15.
[0048] (3) Use two boring tools to finish turning the valve seat...
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The invention provides a numerical control track machining method for a deep cavity R-type valve seat profile of a valve. The numerical control track machining method comprises the following steps of determining the size of a roughly- turned annular boss according to the profile size requirement of the R-type valve seat; according to the profile size of the R-type valve seat, determining the size of a semi-finish-turned profile and the path of numerical control track machining; according to the profile size of the R-type valve seat profile, determining the size of a finish-turned profile and the path of numerical control track machining; conducting wrapping grinding on the R-type valve seat profile by adopting a grinding tool according to the size of the R-type valve seat profile; and inspecting the machined R-type valve seat, wherein the perpendicularity of the profile of the R-type valve seat is measured through a height measuring method, a method of extracting a product for sectioning measurement is adopted to detect and the profile size and coaxiality of the R-type valve seat through a universal tool microscope, and the quality of the sealing surface of the R-type valve seat is detected by adopting a contrast detection method through a stereoscopic microscope. The machining efficiency and the machining quality of the R-type valve seat are effectively improved.
Description
technical field [0001] The invention belongs to the technical field of mechanical processing, in particular to a numerical control trajectory processing method for a valve seat profile of a deep cavity R-shaped valve seat, in particular to a numerical control trajectory processing method for the valve body valve seat profile of an inflatable valve in a liquid rocket engine. Background technique [0002] Valve is a key component of liquid rocket engine, and its sealing performance directly affects the performance of the engine. The valve seat is the key part of valve sealing, and its processing quality directly affects the sealing performance of the valve. The charging valve is the key valve of the attitude control power engine, which is used to directly charge and deflate the gas cylinder. In conventional processing, the R-type valve seat profile of the deep cavity of the inflation valve body ( figure 1 ) Using forming turning tools or forming countersinks for processing, ...
Claims
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Login to View More IPC IPC(8): B23P15/00
CPCB23P15/001
Inventor仵亮李龙飞杨生旭刘翔程辉辉利明李建华
OwnerXIAN SPACE ENGINE CO LTD