A method and device for online measurement of shape and position error of large-diameter cylinder liner
A form and position error and measurement method technology, which is applied to measurement devices, optical devices, instruments, etc., can solve the problems of high detection cost, low detection efficiency of large-diameter cylinder liner, poor detection accuracy, etc. The effect of fast speed and cost saving
Inactive Publication Date: 2016-01-06
JIANGSU UNIV OF SCI & TECH
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[0003] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a large-diameter cylinder liner shape error online measurement method and device to solve the existing problems of low detection efficiency, poor detection accuracy and high detection cost of large-diameter cylinder liners. question
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[0065] The CNC vertical lathe used in this embodiment is Siemens 802d CNC vertical lathe. This CNC vertical lathe does not support macro instructions, so a special M command M56 is defined inside the CNC system. When M56 is executed, it controls a certain PLC in the CNC vertical lathe. The designated relay contact is closed, which is connected to the trigger terminal of the laser sensor controller. First install the laser sensor on the base, and the base is fixed on the tool holder of the CNC vertical lathe, so that the laser emitted by the laser sensor is perpendicular to the inner wall of the cylinder liner. Input the shape and position error item in the computer software as straightness error, and then input Cylinder liner geometric parameters (inner diameter 1000mm, height 2000mm), CNC vertical lathe workpiece coordinate system origin (0,2000), sensor initial position (0,100), sensor position compensation parameters (X direction 60mm, Z direction 10mm), CNC The step length...
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The invention provides a large-diameter cylinder liner form and position error on-line measuring method and device. According to the method, measuring parameters are input into computer software, and numerical control measuring instructions are generated and sent to a numerical-control vertical lathe; according to the numerical control measuring instructions, the vertical lathe controls a cylinder liner and a laser displacement sensor arranged on a main shaft to move and sample, and sends measuring data of samples to a computer through a communication interface; the computer pre-processes the received measuring data according to the measuring parameters and the numerical control measuring instructions to obtain coordinate value; when measurements are completed, all the coordinate value is calculated in an optimum mode according to an established mathematical model, so that needed form and position error value is obtained. The device is composed of the laser displacement sensor, a sensor controller, a base and the computer. According to the device and method, the measurement and calculation of cylinder liner form and position errors are completed directly on the numerical control vertical lathe, so that detecting cost is low, measuring efficiency is high and measuring errors are small.
Description
technical field [0001] The invention belongs to the field of measurement and testing and relates to the measurement of the shape and position error of a cylinder liner, in particular to an online measurement method and device for the shape and position error of a large-diameter cylinder liner. Background technique [0002] Large-diameter cylinder liners are important components of marine diesel engines. With the rapid development of the shipbuilding industry, the demand for cylinder liners is increasing. The detection of cylinder liners directly affects the improvement of the output and quality of cylinder liners. The development of cylinder liner production in my country is very Rapid, traditional detection methods are mainly contact dial indicators, dial indicators and measuring gauges. This method has poor repeatability and many human interference factors, which greatly affects production efficiency. Chinese patent application No. 201020619481.1 discloses "Cylinder Liner I...
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IPC IPC(8): G01B11/00G01B11/26
Inventor 苏世杰代永俊李钦奉周国平齐继阳吴琼唐文献庄宏张建
Owner JIANGSU UNIV OF SCI & TECH