A method of combining laser tracking technology with cad/cam technology to realize precise machining of curved surface
A laser tracking and precise processing technology, applied in metal processing, metal processing equipment, metal processing mechanical parts, etc., can solve the problem of accurate positioning of difficult workpieces, and achieve the effect of ensuring processing accuracy
Active Publication Date: 2015-08-05
CHINA ERZHONG GRP DEYANG HEAVY IND
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[0003] The present invention aims to provide a method of combining laser tracking technology with CAD / CAM technology to realize precise processing of curved surfaces, so as to overcome the problem that it is difficult to accurately position the workpiece in a conventional way during processing
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] In the following detailed description, workpiece 1 is machining 1 Figure 1~2 Blanks for ball petals shown. As mentioned in the background art, the blank is formed by die forging a plate. Each surface on the workpiece 1 is an irregular spatial curved surface, including inner and outer spherical surfaces and four end surfaces of the workpiece 1 . Since this specific embodiment only takes the finishing of the inner spherical surface as an example, the actual rough-machined surface 5 mentioned below refers to the inner spherical surface of the workpiece 1 .
[0022] Such as image 3 As shown, the workpiece 1 should be installed on a support 2 before processing. exist image 3 Among them, the actual rough-machined surface 5 of the workpiece 1 does not completely coincide with the theoretical rough-machined surface 6 (that is, the curved surface theoretically for...
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The invention discloses a method for realizing accurate processing of a curved surface by combining a laser tracking technology with a CAD (computer-aided design) / CAM (computer-aided manufacturing) technology so as to overcome the problem that a workpiece is difficult to be accurately positioned in a conventional way during processing. The method mainly comprises the following steps: a, arranging multiple reference points on an actual rough processing surface of a workpiece, measuring the three-dimensional coordinates of each reference point by utilizing a laser tracker, inputting the measured data into a computer, and establishing a three-dimensional digital model of the reference points on the computer; b, fitting the three-dimensional digital model of the reference points with a theoretical model of the workpiece on the computer so as to determine a relative position relationship between the three-dimensional digital model of the reference points and the theoretical model of the workpiece; c, selecting partial reference points as datum points from the three-dimensional digital model of the reference points, and calculating theoretical distances between the three-dimensional digital model of the datum points and the origin of coordinates of a theoretical model of a cutting device respectively; and d, positioning the cutting device and the workpiece by virtue of the laser tracker.
Description
technical field [0001] The invention relates to the field of curved surface processing methods, in particular to a method for realizing precise processing of curved surfaces by combining laser tracking technology and CAD / CAM technology. Background technique [0002] A part is a hollow sphere with a diameter of several meters, with a number of through holes distributed over the entire surface of the sphere. Due to the strict requirements on the machining accuracy of these holes, a reasonable manufacturing process is to firstly combine multiple ball petals with the same shape and size (such as Figure 1~2 Shown) welded into a hollow sphere, and then drill holes on the surface of the hollow sphere with the same reference. Therefore, in order to ensure the machining accuracy of the hollow sphere, the machining accuracy of the ball valve must first be guaranteed. The ideal ball valve processing method is to forge the plate first to form a blank, and then use a multi-axis CNC mil...
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IPC IPC(8): B23C3/16B23Q15/22
Inventor 史苏存段玲刘慧琳宋玉刚
Owner CHINA ERZHONG GRP DEYANG HEAVY IND