A non-contact detection method for in-position shaft workpieces
A technology for shaft workpieces and detection methods, which is applied to metal processing machinery parts, manufacturing tools, metal processing equipment, etc., can solve the problem of very high machining accuracy of camshaft journal runout, low measurement efficiency, and inability to adapt to high-precision and high-efficiency scale Problems such as optimized production mode, to avoid damage and loss of testing equipment, high detection efficiency, and wide applicability
Active Publication Date: 2022-02-11
JIANGSU UNIV OF SCI & TECH
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Among them, the machining accuracy of camshaft journal runout is very high, and it is also a must-check item for inspection. Traditional optical mechanical measuring instruments, contact probe measuring instruments and sample measurement efficiency are extremely low and most of them need to be carried out offline, which cannot adapt to today's high-precision and efficient scale. The needs of the production mode
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[0256] Taking the camshaft produced by a diesel engine factory as an example, the diameter of the camshaft journal is 180mm, the length is 1780mm, the runout tolerance requirement is 0.05mm, the coaxiality tolerance requirement is 0.05mm, and the camshaft profile requirement is 0.08mm. Therefore, according to the size of the camshaft to be detected, the line laser measuring instrument of the detection device selects a certain LJ-X8400 type, which can measure a maximum width of 320mm and has a precision of 5um; the CCD laser displacement sensor selects a certain LK-G400 type, with a precision of 2um and a measurable range of 400±100mm .
[0257] Place the detection system on one side of the machine tool, place the camshaft in the workpiece clamping device calibrated with the detection system above, align the optical path of the line laser measuring instrument with the reference axis section of the workpiece, and start the line laser measurement of positions A and B measuring in...
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The invention discloses a method for in-situ non-contact detection of a shaft workpiece, comprising the following steps: establishing a detection system, calibrating the detection system and establishing a detection coordinate system; analyzing the position and posture of the workpiece in the detection system and establishing the coordinates of the workpiece clamping device System; control the rotation of the clamping device of the shaft workpiece processing machine tool, the line laser measuring instrument performs continuous data acquisition, calculates and analyzes the collected data, and obtains the ideal reference axis of the shaft workpiece; the laser displacement sensor performs continuous data acquisition on the detection part , calculate and analyze the collected data, and obtain the actual runout machining accuracy of the camshaft journal; use the line laser measuring instrument to continuously collect data on the detection part, and calculate and analyze the collected data to obtain the machining accuracy of the coaxiality of the shaft workpiece. The invention can detect the center of the shaft journal and its ideal reference axis in real time, avoiding the system error and compensation difficulties caused by the traditional use of thimble references or V-shaped blocks.
Description
technical field [0001] The invention relates to a detection method for shaft workpieces in the processing field, in particular to a non-contact detection method for shaft workpieces in-position. Background technique [0002] The camshaft is a part of the piston engine. Its function is to control the opening and closing of the valve. The main body of the camshaft is a cylindrical rod with approximately the same length as the cylinder group. There are several journals on it and several bushes between the journals. A cam is used to drive the valve. The camshaft is the core component of the engine, and its machining accuracy directly affects the overall performance indicators of the engine such as noise, power performance, and economy. Among them, the machining accuracy of camshaft journal runout is very high, and it is also a must-check item for inspection. Traditional optical mechanical measuring instruments, contact probe measuring instruments and sample measurement efficien...
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IPC IPC(8): B23Q17/20
CPCB23Q17/20G05B19/401G05B2219/37194G05B2219/37573G05B2219/37582G01B11/03G01B11/026
Inventor 李国超刘云龙周宏根冯丰赵东豪周浩于丹平韩冬梅朱建伟
Owner JIANGSU UNIV OF SCI & TECH