Pairing processing method of large-sized and irregular revolving molding surface member

Abstract

The invention discloses a pairing processing method of a large-sized and irregular revolving molding surface member. In the method, a three-dimensional simulation measuring head is utilized to carry out automatic tracing and measuring and data collection on a practical fitting curved surface of a covering, a data point set [p] of the centre of a sensing finger pommel of the three-dimensional simulation measuring head is obtained, mathematical treatment with isometry calculation is carried on the obtained data point set [p], a corresponding point set [p1] of the practical surface of the covering is obtained, location optimization is carried out on theoretical covering curved surface, and a digital pairing processing point set [Q] of the surface of a honeycomb sandwich is generated, compensation to the radius of a grinding wheel is carried out, a point set [M] of a movement locus of the centre of the grinding wheel is obtained, the three-axis linkage interpolation method taking C axis of a rotation axis as a benchmark is adopted, and the upper surface and the lower surface of the honeycomb sandwich are respectively ground and processed. The invention realizes integration of measurement, mathematical treatment and digital treatment of the large-sized and irregular revolving molding surface member and has high treatment precision and high treatment efficiency; in addition, the product percent of pass is 100 percent, and the production period is shortened to three days from ten days so as to meet the needs of production.

Description

technical field [0001] The invention relates to a paired processing method of large-scale rotary surface components, in particular to a paired processing method of large irregular rotary surface components. Background technique [0002] The large-scale honeycomb common-bottom component is one of the key components in the final stage propellant tank of the launch vehicle. It is used to isolate liquid hydrogen and liquid oxygen fuel. It is required to have high thermal insulation and compression resistance and light weight. The component is a large-scale elliptical revolving surface spherical crown component, which is made of a honeycomb sandwich core made of composite materials and an upper and lower bottom skin made of aluminum alloy through cooperation and bonding. The design shape of the inner surface of the skin, that is, the contact surface between the skin and the honeycomb sandwich, is a theoretical elliptical rotary surface. Since the skin is made of a thin aluminum a...

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Problems solved by technology

[0003] In order to ensure the high quality of bonding and curing of spherical crown components, that is, the single debonding area of ​​the skin and the honeycomb sandwich surface should be less than 625 square millimeters, and the total debonding area should not be greater than 0.5% of the skin surface area, so bonding and curing are required The normal fit gap between the front skin and the surface of the honeycomb sandwich should be less than 0.2mm. Only when the shape and size of the upper and lower surfaces of the honeycomb sandwich are completely consistent with the inner surfaces of the upper and lower bottom skins can the bonding area It meets the design requirements, but neither the manual grinding method nor the CNC machining method of processing the theoretical ellipsoid can meet the above production requirements

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