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A numerical control machining method for I-shaped profiles

A processing method and technology of I-shaped profiles, which are applied in the field of profile processing, can solve problems such as insufficient processing rigidity, easy chattering during processing, and poor processing rigidity of supporting columns, so as to reduce straightness, clamping and alignment time, and improve processing efficiency Effect

Active Publication Date: 2019-12-17
江西洪都航空工业股份有限公司
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Problems solved by technology

[0002] The support columns of large aircraft are aluminum-lithium alloy profiles, and the side ribs are independent ribs, the thickness is generally 1mm to 2mm, the ratio of rib height to rib thickness is generally greater than 10, and there are no support structures such as process bosses around. Therefore, new materials and structural forms It determines that the processing rigidity of the supporting column is poor, the processing is easy to flutter, and the sound is loud
Due to the deformation of the raw material of the I-shaped profile and the lack of rigidity in processing, the tooling should meet the requirements of fast positioning of the straight end, side wall and web surface. The traditional cutting parameters of aluminum alloy sheet cannot meet the processing of supporting columns. Therefore, for this type of support column I-shaped profile, it is necessary to design a set of special fixtures that conform to the structural characteristics and processing characteristics of this type of parts, so as to meet the high-efficiency processing of such parts in batch production, and at the same time control the I-shaped profile during processing. out of shape

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  • A numerical control machining method for I-shaped profiles

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Embodiment Construction

[0050] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0051] A kind of I-shape profile numerical control processing method, concrete steps are as follows:

[0052] 1) Prepare and process reference holes

[0053] Firstly, drill a hole on the I-shaped profile 1, then ream the hole, and ream the hole after reaming to achieve H-level precision, and process the reference hole, and the perpendicularity between the processed reference hole and the web surface of the I-shaped profile is ≤ 0.05;

[0054] 2) Position and clamp the I-shaped profile

[0055] Fix the positioning and clamping fixture on the machine tool, and straighten the tooling, position and clamp the I-shaped profile 1 through the positioning and clamping fixture, and at the same time correct the non-clamping side to ensure that the straig...

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Abstract

The invention discloses an I-shaped section bar numerical control processing method. A positioning clamping fixture which is used for performing positioning and clamping on the I-shaped section bar isinstalled on a five-coordinates high-speed numerical control miller, vibration during processing can be effectively controlled, the positioning and clamping of the I-shaped section bar can be rapidlyachieved, the spare part linear degree correcting and clamping centering time of workers is effectively reduced, the processing efficiency of the I-shaped section bar is improved, front coarse processing, front fine processing, back coarse processing, back fine process and benchwork processing boss removing can be conducted on the I-shaped section bar by utilizing the five-coordinates high-speednumerical control miller and a hard alloy milling cutter, feed processing parameters are provided, the difficult problem of deformed I-shaped section bar during processing can be effectively controlled, and therefore the size and accuracy of spare parts are ensured.

Description

technical field [0001] The invention relates to the technical field of profile processing, in particular to a numerically controlled processing method for an I-shaped profile. Background technique [0002] The support columns of large aircraft are aluminum-lithium alloy profiles, and the side ribs are independent ribs, the thickness is generally 1mm to 2mm, the ratio of rib height to rib thickness is generally greater than 10, and there are no support structures such as process bosses around. Therefore, new materials and structural forms It is determined that the processing rigidity of the support column is poor, the processing is easy to flutter, and the sound is loud. Due to the deformation of the raw material of the I-shaped profile and the lack of rigidity in processing, the tooling should meet the requirements of fast positioning of the straight end, side wall and web surface. The traditional cutting parameters of aluminum alloy sheet cannot meet the processing of suppo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 熊勇向兵飞兰惠杨立琼卢晓良黄洪萍王敏刘志坚徐寒钟伟成阳
Owner 江西洪都航空工业股份有限公司
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