I-shaped section bar numerical control processing method

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...

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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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