Interference check method of advance and retreat tool trajectory in NC machining based on dynamic visualization
A technology of interference inspection and processing trajectory, applied in program control, computer control, general control system, etc., can solve problems such as affecting the production efficiency and economic benefits of enterprises, affecting the production cycle of parts processing, and large repetitive workload, saving work. Quantity, reduce the probability of error, high accuracy
Active Publication Date: 2016-06-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
Since the current commercial CAD / CAM software does not provide this function, engineers need to spend a lot of time to find interference parts and modify parameters, and often need to use related professional simulation software, which has a large amount of repetitive work, high work intensity and high efficiency. low
[0004] The dynamic advance and retreat tool interference check method can greatly improve the programming efficiency of engineers, especially for some large and complex aircraft structures. Due to the complex structure and many free-form surfaces, craftsmen often need to scroll the screen while carefully observing the changes of the tool path. Check whether there is any interference, the repetitive workload is heavy, and the efficiency is low, which seriously affects the entire processing and production cycle of the parts, which in turn affects the production efficiency and economic benefits of the enterprise
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[0037] The following structural drawings and embodiments further illustrate the present invention.
[0038] Such as Figure 1-8 shown.
[0039] A dynamic visualization-based inspection method for NC machining advance and retreat tool path interference can be summarized as the following 11 steps:
[0040] Step 1: Read the part process model.
[0041] Step 2: Read the part feature recognition result list.
[0042] Step 3: Select the processing operation of the advance and retreat tool interference check and obtain the relevant parameter information.
[0043] Step 4: Quickly generate the machining trajectory of the machining operation.
[0044] Step 5: Generate the modified tool path in real time according to the parameters modified interactively by engineers.
[0045] Step 6: Extract tool model information.
[0046] Step 7: Automatically judge the macro elements of the advance and retreat tools that need to be checked.
[0047] Step 8: Automatically obtain the tool positi...
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A numerical control machining tool feeding and retracting track interference check method based on dynamic visualization is characterized in that firstly, through machining operation built by click engineers in a CAM system, a part process model is automatically read, the machining track of the operation is calculated, tool feeding and retracting parameter information included in the operation is obtained, and the operation machining track can be modified by manually inputting the parameter information. Any face in the part model is clicked, interference check is performed on a certain macroelement of the machined track according to the clicked face, and the check condition is instantly fed back to the engineers. The method is good in visualization, good in flexibility, high in accuracy, good in interaction and capable of improving the work efficiency of the engineers, rehandling of the engineers is avoided, the engineers can visually check the interference condition of the machining track and the part, and instant modification is performed.
Description
technical field [0001] The invention relates to a numerical control machining technology, in particular to a method for checking interference of advance and retreat tool tracks in dynamic numerical control machining of aircraft structural parts, in particular to a method for checking interference of advance and retreat tool tracks in numerical control machining based on dynamic visualization. Background technique [0002] Aircraft structural parts are large in size and complex in structure, including a large number of free-form surfaces, intersecting features, and special processing areas. The processing is difficult and the processing cycle is long. For the overall structural parts of large aircraft, the ratio of NC programming time to machine tool processing time reaches 7:1, and the efficiency of NC programming is low, resulting in a waste of machine tool capacity. [0003] For some free-form surfaces and difficult-to-machine areas, engineers often encounter the problem o...
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IPC IPC(8): G05B19/4068
Inventor 李迎光刘旭许锡春李强
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS