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Method for machining circumferential standard-free composite part

A kind of mechanical processing and non-reference technology, which is applied in the direction of adopting mechanical devices, mechanical measuring devices, measuring devices, etc., can solve the problems of parts without reference, machining errors, product scrapping, etc., and achieve the effect of high precision and accurate positioning

Active Publication Date: 2019-12-20
航天海鹰(镇江)特种材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By using three-coordinate measurement or machining online measurement to complete the precise machining of the reference hole, it solves the problem that the product has no reference or the subsequent machining error caused by the reference error causes the product to be scrapped.

Method used

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  • Method for machining circumferential standard-free composite part
  • Method for machining circumferential standard-free composite part
  • Method for machining circumferential standard-free composite part

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0032] (1) The machine-added coordinate system is established by using the reference features of the 79-frame cutting and drilling tool itself.

[0033] (2) if figure 1 As shown, the auxiliary initial positioning device of the 79-frame cutting and drilling tool is used to initially locate the 79-frame parts, and the preliminary fuzzy positioning is carried out through the positioning ribs, and the preliminary verification is carried out through the engraved lines on the surface of the 79-frame. Position the frame 79 in the coordinate system of the cutting and drilling tool of the frame 79, and combine the frame 79 with the machine-additive numerical simulation.

[0034] (3) if figure 2 As shown, the machining of three auxiliary reference holes is performed outside the margin area of ​​frame 79 and the coordinate theoretical values ​​of the three auxiliary reference holes under the current digital model are given.

[0035] (4) Measured by three coordinates. The measurement ...

specific Embodiment 2

[0041] (1) The machine-added coordinate system is established by using the reference features of the 80-frame cutting and drilling tool itself.

[0042] (2) if Figure 5 As shown in the figure, the auxiliary initial positioning device of the 80-frame cutting and drilling tool is used for initial positioning of the parts, and the initial fuzzy positioning is performed by positioning the ribs. Position the product under the coordinate system of the cutting and drilling tool, and combine the product with the machine-additive simulation.

[0043] (3) if Figure 6 , 7 As shown, three small-diameter auxiliary reference holes are machined outside the large-diameter process hole margin area of ​​frame 80 and the coordinate theoretical values ​​of the three auxiliary reference holes under the current digital model are assigned.

[0044] (4) Measure by three coordinates, the measurement reference is three small-diameter auxiliary reference holes, use the iterative method to establish a...

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PUM

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Abstract

The invention discloses a method for machining a circumferential standard-free composite part. The method comprises the steps of: 1, establishing a machining coordinate system; 2, verifying the coordinate system while under the condition that three auxiliary references are unqualified in preliminary positioning, establishing a coordinate system according to three auxiliary reference hole actual values subjected to reverse backstepping, re-measuring characteristics of the part, ensuring that the measurement result is qualified under the coordinate system, sending the qualified measurement result to a five-axis machine tool, and taking the three reference hole actual values as formal reference holes and as the reference of the machining coordinate system; 3, carrying out machining; 4, and performing final measurement, wherein the final measurement is implemented by establishing a coordinate system by means of four reference holes, measuring axis degrees of all vertical ribs, measuring profile tolerance of a web and outer edge flanges, measuring an assembly positioning position degree, and measuring hole diameter of process holes, wherein the axis degrees of the vertical ribs on the surface of the web are required to be + / -1 mm, the profile tolerance is required to be 0.75 mm, the position degrees of the positioning holes are required to be 0.3 mm, and hole diameter size toleranceof the process holes are required to refer to an HB7741 standard.

Description

technical field [0001] The invention relates to the technical field of advanced composite material manufacturing, in particular to the machining manufacturing of high-performance carbon fiber composite structural parts in the aircraft, spacecraft and automobile industries. Background technique [0002] Resin-based carbon fiber composite materials have advantages such as high specific strength, high specific stiffness, high structural integration, strong designability, good fatigue fracture resistance, corrosion resistance, and good dimensional stability. At present, they have become a popular choice in aviation, aerospace, transportation and other fields. High-performance structural materials widely used in [0003] With the increasing requirements for the strength and stiffness of composite material parts, the structure of the parts is becoming more and more complex. Among them, the circular frame with a circumferential disc and vertical rib structure is one of the typical ...

Claims

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Application Information

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IPC IPC(8): G01B5/004G01B5/00
CPCG01B5/00G01B5/004
Inventor 潘春林何凯赵砚严方超陈志霞黎玉钦郭渊杨春华文龙任慧敏
Owner 航天海鹰(镇江)特种材料有限公司