Hole-making process method adopting pre-positioning and secondary precise positioning combination

Abstract

The invention belongs to the technical field of composite material assembly, and discloses a hole-making process method adopting pre-positioning and secondary precise positioning combination. A reinforcing ring comprises an upper frame edge, a lower frame edge, two side frame edges, an upper reinforcing frame, a lower reinforcing frame and a composite material shell, the frame edges, the reinforcing frames and the composite material shell are mounted on an assembly-inspection fixture to be pre-positioned, and the reinforcing ring is spliced; an assembly-inspection fixture drilling die is usedfor making a plurality of evenly-distributed positioning holes in the reinforcing ring; the reinforcing ring is disassembled, and the frame edges are mounted on a special hole-making drilling die forhole making; and then the frame edges, the reinforcing frames and the composite material shell are remounted on the assembly-inspection fixture, positioning is conducted through the positioning holes,and then holes of the reinforcing frames are drilled on the holes made in the frame edges by leading. According to the hole-making process method, it can be ensured that the positioning datum is uniform, the error caused by manual scribing hole-making is avoided, the precision of the hole positions is ensured, the hole-making time is greatly shortened, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of composite material assembly, and relates to a hole-making method in the assembly of a radome, in particular to a hole-making process method combining pre-positioning and secondary precise positioning. Background technique [0002] There are generally four ways to determine the hole position in riveting assembly: drawing lines according to the size of the pattern, according to the template, according to the guide hole and the drilling template. Among them, marking according to the size of the drawing refers to marking the center line of the fastener position on the workpiece with a steel ruler and a pencil according to the size specified on the product drawing. This method has low accuracy, low production efficiency, and heavy drilling workload, so it is only used in trial production or single-piece production. For holes with coordination and interchange requirements, or strict requirements on verticality...

AI Technical Summary

Problems solved by technology

[0003] figure 1 The bottom of the reinforcing ring shown is the strengthening and fixing device of the radome. The ring is divided into two layers, and nearly 220 holes are riveted by rivets. Previously, the method of manual marking and three-check hole making was used, and the accuracy was unstable. And the production efficiency is also very low. It takes 4 to 5 days to complete the hole making of a piece of equipment

However, the method of directly adopting the drilling mold to make holes, because the reinforcement ring is too large, and is divided into two-layer, multi-component part structure, the general drilling mold structure and method are difficult to ensure the relative positional relationship of the various parts of the reinforcement ring, which will affect the manufacturing process. Hole precision

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