Envelope theory-based universal cutter scanning body generating method
A general-purpose tool and scanning body technology, applied in the general control system, program control, computer control, etc., can solve the problems of increasing the difficulty of tool scanning, increasing the flexibility and complexity of tool movement, etc.
Active Publication Date: 2014-05-07
中国科学院沈阳计算技术研究所有限公司
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Problems solved by technology
However, the current work has the following problems and limitations: 1. Only for the generation of tool scanning volume in three-axis NC machining simulation
2. It is only suitable for scanning volume generation of specific tool types
Five-axis CNC machining has been widely used because of its high-efficiency machining characteristics. Compared with three-axis machining, it has two more degrees of freedom, which increases the flexibility and complexity of tool movement. Therefore, the generation of tool scanning volume is also very difficult. Increase
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[0054] Below in conjunction with the accompanying drawings, the present invention will be further described in detail by taking the fillet knife as an example.
[0055] The invention provides an accurate tool scanning body generation algorithm, which is suitable for both three-axis processing simulation and five-axis processing simulation. Based on the surface family envelope theory, and according to the characteristics of the boundary line of the envelope surface, the calculation method for the tool movement to form the tool scanning volume in NC machining is deduced; in order to make the algorithm more general, a general tool model is established, and the geometry is given. Description and strict mathematical expression; analyze the motion characteristics of the tool in five-axis machining from the perspective of rigid body kinematics, establish a motion coordinate system, and solve the tool scanning body based on the motion coordinate system, which makes the algorithm not li...
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The invention relates to an envelope theory-based universal cutter scanning body generating method in a numerically controlled processing simulation process. The method comprises the following steps: cutter parameters are defined according to an NC process, a cutter model is built according to the definition of the universal cutter model in a figure 1 by using the parameters, and further the initial position data of the cutter is calculated through the cutter model; and in case of no cutter position datum, the information is terminated, the next group of cutter position data is read, and the cutter scanning body is calculated according the two adjacent groups of cutter position data, so as to obtain the cutter scanning body data between two cutter positions. According to the method provided by the invention, an accurate solution manner is adopted, and the generated scanning body is realistic and good in visual effect. Therefore, the method provided by the invention is not only suitable for triaxial processing simulation and five-axis processing simulation, but also suitable for the solution of other scanning bodies at rigid motion.
Description
technical field [0001] The invention relates to a numerical control machining simulation technology, in particular to a method for generating a universal tool scanning body in numerical control machining simulation based on envelope theory. Background technique [0002] With the wide application of free-form surface parts in advanced manufacturing industries such as aviation, ships, and automobiles, how to realize efficient machining of free-form surface parts has become a hot and difficult issue in the field of computer-aided design and manufacturing. The correctness of NC program is a necessary condition to improve the productivity and part quality of NC machining. As an efficient NC program verification method, NC machining simulation has become a research hotspot. [0003] It is an efficient NC program verification method to use the computer to simulate the NC machining, realize the trial cutting process of the parts from the software, and display the execution process ...
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IPC IPC(8): G05B19/4099
Inventor 郭锐锋邵志香于东李杰彭健钧
Owner 中国科学院沈阳计算技术研究所有限公司