A Method for On-line Measurement and Compensation of Surface Position Error of Deep Pipe Inner Wall

Abstract

The invention relates to the field of mechanical processing, in particular to an online measurement and compensation method of position error of an inner wall surface of a deep pipe. A non-contact online intelligent detection system of the online measurement and compensation method of position error of an inner wall surface of a deep pipe comprises a deep pipe, an industrial control computer, a support, a panel, a cutter bar, a triangular displacement sensor, a boring cutter, a seal cover, a first bar core, a first displacement sensor, a reflector and a second bar core, wherein the deep pipe,the industrial control computer, the support, the panel, the cutter bar, the triangular displacement sensor, the boring cutter, the seal cover, the first bar core, the first displacement sensor, the reflector and the second bar core are arranged on a center frame and a chuck; the cutter bar is arranged in the deep pipe; the boring cutter is arranged at the front end of the cutter bar; the seal cover is arranged at the top end of the cutter bar; and the panel is arranged at the tail end of the cutter bar. The online measurement and compensation method of position error of an inner wall surfaceof a deep pipe makes a difference between final regulation and control parameters and initial processing parameters, solves the relative error, and provides a possible error range for the subsequent processing parameter selection, so as to enable an operator not to strictly adhere to the position error prediction map and consider the efficiency in the error range during the initial processing period, and greatly expanding the flexibility and adaptability of the method.

Description

technical field

[0001] The invention relates to the field of mechanical processing, in particular to an online measurement and compensation method for the position error of the inner wall surface of a deep pipe. Background technique

[0002] Deep pipes are widely used in oil and gas transportation and specific equipment, and require high internal surface quality and high precision in many specific transmission occasions. The deep pipe is a part of revolution, and the actual processing mainly adopts the boring process; the deep pipe has a high length-to-diameter ratio, and the actual processing state cannot be directly observed during the processing. At present, operators mainly obtain suitable processing parameters based on previous processing experience and on-site trial cutting. At the same time, due to the lack of suitable monitoring equipment, the state of the processing process is unpredictable, and it mainly depends on the operator's hands touching the outer wall of th...

Examples

Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0041] The present invention needs to perform error value prediction, actual measurement, error evaluation, real-time adjustment and error quantification of the inner wall surface of the deep tube 20 to determine initial processing parameters and complete real-time adjustment during processing. The surface cumulative position error of the inner wall of the deep tube 20 is mainly caused by the forced vibration of the machining process, the overhang of the tool bar 8 and the boring depth, which is expressed as the difference between the ideal machined surface S1 and the actual machined surface S2 of the inner wall of the deep tube 20 , resulting in over-cutting or under-cutting on the inner wall surface of the deep tube 20. With the deepening of the processing and the continuous cutting of the hole wall, the surface position error will show a cumul...

technical field

[0001] The invention relates to the field of mechanical processing, in particular to an online measurement and compensation method for the position error of the inner wall surface of a deep pipe. Background technique

[0002] Deep pipes are widely used in oil and gas transportation and specific equipment, and require high internal surface quality and high precision in many specific transmission occasions. The deep pipe is a part of revolution, and the actual processing mainly adopts the boring process; the deep pipe has a high length-to-diameter ratio, and the actual processing state cannot be directly observed during the processing. At present, operators mainly obtain suitable processing parameters based on previous processing experience and on-site trial cutting. At the same time, due to the lack of suitable monitoring equipment, the state of the processing process is unpredictable, and it mainly depends on the operator's hands touching the outer wall of th...

Examples

Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0041] The present invention needs to perform error value prediction, actual measurement, error evaluation, real-time adjustment and error quantification of the inner wall surface of the deep tube 20 to determine initial processing parameters and complete real-time adjustment during processing. The surface cumulative position error of the inner wall of the deep tube 20 is mainly caused by the forced vibration of the machining process, the overhang of the tool bar 8 and the boring depth, which is expressed as the difference between the ideal machined surface S1 and the actual machined surface S2 of the inner wall of the deep tube 20 , resulting in over-cutting or under-cutting on the inner wall surface of the deep tube 20. With the deepening of the processing and the continuous cutting of the hole wall, the surface position error will show a cumul...

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