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A Method for Machining Circumferentially Referenceless Composite Parts

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

Active Publication Date: 2021-06-15
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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  • A Method for Machining Circumferentially Referenceless Composite Parts
  • A Method for Machining Circumferentially Referenceless Composite Parts
  • A Method for Machining Circumferentially Referenceless Composite Parts

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, the machining of three small-diameter auxiliary reference holes is carried out 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 given.

[0044] (4) Measure through three coordinates, the measurement reference is three small-diameter auxiliary reference holes, use the iterative...

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Abstract

The invention discloses a method for machining composite material parts without reference in the circumferential direction, which comprises the following steps: step 1: establishing a machine-added coordinate system; step 2: verifying the coordinates when the three auxiliary references in the initial positioning are unqualified system, establish a coordinate system through the actual values ​​of the three auxiliary reference holes after reverse deduction, re-measure the features of the part, ensure that the measurement results are qualified in this coordinate system, and send them to the five-axis machining center and the actual values ​​of the three reference holes as the official The reference hole is used as the reference of the machining coordinate system; Step 3: machining; Step 4: final measurement, establish a coordinate system with four reference holes. Measure the axial degree of all vertical ribs, the axial degree of the vertical rib on the web surface is required to be ±1mm, measure the contour degree of the web and the outer edge flange, the contour degree requirement is 0.75mm, measure the position degree of the assembly positioning hole, the position degree requirement of the positioning hole It is 0.3mm, measure the hole diameter of the process, and the tolerance requirements of the hole size refer to the 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 the advantages of high specific strength and specific stiffness, high degree of structural integration, strong designability, good fatigue resistance, corrosion resistance, and good dimensional stability. 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 structural parts. In this kind of parts, the processing and testing benchmarks of the products cannot be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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