CAXA Manufacturing Engineer combined with PowerMIL

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CAXA manufacturing engineers combine the application of PowerMILL in mold manufacturing

at this stage, with the widespread popularity of CNC machine tools, many factories have realized the transformation from 2D design software to 3D design software, and CNC machine tools have also changed from the original direct NC programming in G code or apt language to computer-aided programming. The author's unit has successively purchased the series software of Delcam company in the UK and CAXA series software developed by CAXA company in Beijing to improve the NC processing ability of the unit

in the practice of numerical control, we found that CAXA series software is developed by China's own software enterprises, so CAXA is easy to learn, easy to use, simple and practical for Chinese people, and is very suitable for Chinese processing enterprises. Delcam is the world's leading professional cad/cam integrated system developer. It is the only cad/cam software company in the world that has a large NC machining workshop. Its core machining software PowerMILL module is unique for its safety, convenience and efficiency

this paper will discuss the use of CAXA Manufacturing Engineer software combined with PowerMILL to achieve a simple, efficient and consistent with the habits of the Chinese die cad/cam integrated solution

I. realization of mold design in CAXA Manufacturing Engineer Software

CAXA Manufacturing Engineer software is a cad/cam software running under Windows environment. It can be used as a sensor and equipment for flame retardant, thermal insulation coating and converting heat into electrical energy. The software provides powerful modeling functions such as wireframe modeling, surface modeling and solid modeling. The technology based on solid precise modeling provided by the software includes five methods for adding materials, such as stretch adding and guide adding, six methods for reducing materials, such as rotary removing, lofting removing and surface cutting, and feature functions such as transition, shell drawing and draft, as well as mold related functions such as scaling, cavity and parting. Because the precise modeling technology is adopted, the surface is fused into the solid to form a unified surface solid composite modeling technology. Using this mode, the blending operations of surface clipping solid, surface generating solid and surface constraining solid can be realized. The most important thing is that CAXA Manufacturing Engineer software is specially designed for the Chinese and developed by the Chinese themselves. The full Chinese interface and fast and concise Chinese help documents conform to the operating habits of the Chinese development and design, which enables us to quickly master the software in the shortest time

taking the establishment of the friction wedge forging die shown in Figure 1 as an example, this paper analyzes the application of CAXA Manufacturing Engineer Software in die design. For specific parameters, please refer to the sample questions (staff group) of the first national NC skills competition NC milling/machining center software application competition

at present, most 3D space modeling is based on 2D drawings. So how to understand 2D and 3D views well is the first step to make solid modeling. According to the five views provided in the drawing, we should imagine what kind of spatial shape this part is. There are four key sections to determine the shape of the part in the drawing: the left end face, the right end face of the main view, and the B-B and A-A sections in the middle. The main work of modeling is based on these four sections

use the given section for modeling. The preferred function is lofting and adding materials and lofting and removing materials. There are four inclined planes with three different angles around the mold. These three planes can consider multi surface cutting entities, or the upper rectangle can be calculated according to the inclination of the inclined planes around, and the upper and lower rectangles can be used for stretching and material removal. It may be difficult to add or remove materials by setting out for a groove with a depth of 6mm around. At this time, the Boolean operation of the entity can be easily completed

in this way, the mold modeling scheme is determined through analysis:

(1) make four sections

(2) draw and add materials according to the section lines at the left and right ends to obtain the main body of the whole shape

(3) pull and remove the material according to the middle two sections to make the 8.7mm part in the cavity

(4) according to the rectangle at the depth of Z-56 and the slope around, calculate the section extending to the upper part, and do stretching and material removal to obtain the Z-56 pit

(5) make a convex shape with a 6mm deep groove, and perform Boolean operation with the completed model

(6) fillet all corners according to the figure. Through the completion of these six modeling steps, the final modeling results of the friction wedge forging die are shown in Figure 2

through the analysis of mold shape characteristics, the relevant steps of mold solid modeling are determined, and then various complex mold designs can be easily completed by using the solid modeling functions provided by CAXA Manufacturing Engineer software, such as curve modeling, lofting and adding materials, lofting and removing materials, solid Boolean operation and so on

II. Data conversion between CAXA Manufacturing Engineer Software and PowerMILL

to realize cad/cam integration between CAXA Manufacturing Engineer Software and Delcam software, data sharing between them is the key. The default file format of CAXA-ME is its own Mxe file data format, which cannot be recognized by other cad/cam software. In view of the different characteristics of cad/cam engineering software among different departments and units, CAXA-ME needs to have rich graphic data interfaces to ensure the graphic data sharing between CAXA-ME and other software. CAXA-ME includes DXF and IGES standard graphics interfaces based on surface, x-t and X-B interfaces based on entity, STL interfaces for rapid prototyping equipment, and VRML interfaces for Internet and virtual reality. According to our practice, one is the load reading pointer. CAXA-ME can pass IGS, X_ t. X_ B and other file formats can exchange graphic data files with mainstream cad/cam software, but it is best to use X_ T and X_ B these two data formats are the file formats of Parasolid, the modeling kernel of CAXA Manufacturing Engineer Software. Generally, there is no problem when using them for file exchange. CAXA-ME has many problems when reading IGS files, and is prone to file data loss. It is better not to use it. As for DFX format, it is generally used for the exchange of two-dimensional files. Many software do not support three-dimensional DFX

as for the friction wedge forging die model in this article, to realize the conversion from CAXA-ME to other graphic data formats, you can select the "file" menu of caxame, and then select "save as", the file storage dialog box as shown in Figure 3 will appear, and then click and select "Parasolid x_t file (*.x_t)" or "Parasolid x_b file (*.x_b)" in "save type" to save the graphic file

once the graphic data file_ T or X_ After the file format of B is saved, the special Delcam graphic data file conversion program PS exchange can be used to convert the graphic file into a file format recognized by PowerMILL. PS exchange has powerful graphic data conversion function, which enables powermll to directly input data format files of other 3D CAD software (such as pro/engineer, UG, CATIA, SolidEdge, Solidworks, etc.) without other data conversion processing. However, PS exchange does not support CAXA graphic data format files, so it is necessary to convert CAXA graphic data files into X Files recognized by PS exchange_ T or X_ B, and then automatically read the graphic data file in this format into PS exchange for conversion and input into PowerMILL. After clicking the "input model" command under the "file" menu in PowerMILL, you can select the file type to be input under "file type" in the input model dialog box, as shown in Figure 4

Figure 4 PowerMILL input model dialog box

after selecting the input file, PS exchange will start in the background and display the converted graphic file in the graphic box of PowerMILL. Figure 5 shows the display result of friction wedge forging die after PowerMILL input

III. efficient realization of mold processing in PowerMILL

powermill is one of the world's famous NC machining programming software systems with the most powerful functions and the most abundant machining strategies. It is also the most representative and fastest growing machining software of CAM software technology. It is an independent and intelligent cam system for 3D complex shape machining. For Chinese users, PowerMILL's new Chinese user interface and perfect processing strategy can help users generate the best processing scheme, improve processing efficiency, reduce manual rest, and quickly generate rough and finish processing paths; The modification and recalculation of any scheme are almost completed in an instant, reducing the tool path calculation time by 85%; 2.5 NC machining of axis includes complete interference inspection and elimination of tool holder and tool holder; Machining entity simulation is convenient for users to understand the whole machining process and machining results before machining, so as to save machining time; The solid model is processed automatically, and the programming automation of rough, fine and root cleaning is realized

powermill NC programming basic steps mainly include:

(1) model input

(2) blank definition

(3) parameter setting

(4) generation of tool path

(5) tool path simulation

(6) NC program generation

the simulation of tool path is not necessary, and other steps are essential. Parameter settings mainly include tool definition, feed rate setting, fast forward height setting, machining start point setting, cut in/cut out setting, tool axis direction setting, etc. The sequence of parameter settings can be changed arbitrarily, or the default value can be called by ignoring these steps

as shown in Figure 5, after the friction wedge completes the model input, carry out the corresponding parameter settings, and then the NC programming can be carried out. In this paper, according to the structural characteristics of the parts, the tool tip fillet end milling cutter is used, and the method of "parallel area clearance model" in three-dimensional area clearance is used for rough machining; Then, the tool tip fillet end milling cutter is also used to carry out the semi finish machining of the die by using the "equal height finish machining" method in the finish machining; Finally, the ball head cutter is used to finish the die by using the "reference line finish machining" method in the finish machining

the tool path diagram for rough machining of friction wedge forging die is shown in Figure 6. The simulation results of rough machining tool path of friction wedge forging die are shown in Figure 7. The simulation effect of finish machining tool path of friction wedge forging die is shown in Figure 8

the tool path generated by PowerMILL cannot be directly input into the NC machine tool as the NC code for processing. The tool path must be converted through the post-processing program of PowerMILL. The loop in the system must be cut off into the NC program of the corresponding machine tool control system, and then the NC program is input into the NC machine tool to process the blank. PowerMILL provides two post-processing methods: NC program and PM Post Post Post post-processing

only the generation steps of the NC program are introduced here: first, generate the tool path according to the entered model; Then right click each tool path generated "generate independent NC program"; Finally, right-click each generated NC program to "write" the NC program to the default folder

Figure 10 is a part of the NC program list for rough machining of friction wedge forging die applicable to FANUC machine tool control system opened with Notepad program. This NC program can be directly input into the corresponding machine tool for machining

IV. conclusion

caxa manufacturing engineer software has simple and practical modeling functions, easy to learn and understand, and easy to operate; The PowerMILL processing function of Delcam is powerful, safe and efficient, and the Chinese interface is especially suitable for Chinese technicians. Combining the advantages of caxame and PowerMILL, the mold design and processing can be realized simply and efficiently. This method is especially suitable for highDeveloping rubber industry relying on large ethylene
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