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Application of Cimatron Software in cavity mold high-speed machining

high speed machining technology is a high-tech developing rapidly in today's machinery manufacturing industry. It is widely used in mold manufacturing, which can greatly improve the efficiency and quality of mold processing. Starting from the characteristics of high-speed machining, this paper discusses the general programming process of Cimatron Software, analyzes the high-speed machining function and cutting strategy of the software, and summarizes the common methods of cavity mold NC machining. As the key tooling in the production of new products, the design and production of molds have increasingly become the decisive factor in the development cycle of new products. With the development of NC machining equipment and high-performance machining tool technology, the application of high-speed machining technology to mold manufacturing can greatly improve the mold processing speed, reduce the processing procedures, shorten or even eliminate the fitter repair work, thus greatly shortening the mold production cycle. High speed machining has special processing different from traditional processing. Anhan company will demonstrate the process requirements of the world's first "magnetic controlled capsule endoscope robot system" in Ningbo for the first time, and the numerical control instructions of numerical control machining include all the process, so the digital control automatic programming system applied to high-speed machining - cam system must meet the corresponding special requirements: (a) cam system should have a high computing and programming speed; (b) The whole process automatic anti overcut processing ability and automatic knife handle interference inspection; (c) Provide rich machining strategies that meet the requirements of high-speed machining; (d) Feed rate optimization processing function. Cimatron is a set of excellent cad/cam software for surface mold manufacturing industry. It not only provides complete modeling design, drawing, analysis and processing programming functions, but also provides an ideal solution for the whole manufacturing process of cavity mold, especially its application of original knowledge-based processing, automatic NC and Intelligent NC Based on blank residue knowledge, It has become one of the most ideal cavity mold high-speed programming software. In combination with the application of Cimatron in practical machining, the programming process and the method and strategy of high-speed machining of cavity mold are introduced below. 1. The model of Cimatron processing programming process can be directly modeled by Cimatron, or it can be converted by IGES standard format with other CAD software. Become the model format of Cimatron. The specific operation process is: select application IGES read in the datainteface module of Cimatron, select IGS Wen Yi Cheng Xin Neng in the input column why to develop solid-state battery devices, and press execute to complete the conversion of part model format. Set up the machining coordinate system, enter the Cimatron environment, open the part model, select the NC machining menu, and the system prompts to select a machining coordinate system. If it does not exist, set up a machining coordinate system. Cimatron provides four methods to establish the machining coordinate system, usually using three-point positioning. The establishment of machining coordinate system must be based on the principle of reasonable part clamping method and convenient measurement. Generally, the center point of the upper surface of the part is taken as the origin of the machining coordinate system. Tool setting in Cimatron, the tool definition is very flexible. If a machining process is selected, the system will automatically judge whether there are qualified tools in the tool library. If there are, the system will use the last used tools by default; If there is no system, the tool definition menu will be automatically displayed, requiring the definition of tool parameters. Work step in the process of work step, it is required to determine which features can be completed in one clamping, arrange the processing sequence and the tools used, and finally determine what processing method to use to complete these work steps respectively. When a machining method is selected, it is necessary to define the machining object, machining range and machining parameters (such as rotating speed, feed rate, cutting amount of each layer, machining allowance, feed mode and safety plane). After defining various parameters of each working step, the software completes the calculation of the tool path, and the machining simulation can be carried out. When the trajectory is not ideal, the parameters can be modified and calculated again. In some cases, good results can also be achieved by directly programming the trajectory. After the tool path of all work steps is generated, it is converted to machining G code through a special post-processing program. 2 Cimatron high speed machining module analysis and tool walking strategy high speed machining center has preview function. When the tool needs to make a sharp turn, the machining center will pre decelerate in advance, and then increase the movement speed after completing the turn. This function of the machine tool is mainly set to avoid excessive inertia impact, resulting in inertia overcut or machine tool spindle damage. When using Cimatron's cam system for NC programming, we should try our best to ensure that the tool path is smooth and stable. In addition, in high-speed machining, the motion speed of the tool is very high, and the tool used is usually very small. Therefore, it is required to maintain a fixed tool load in the machining process to avoid tool overload damaging the machine tool spindle. Cimatron provides a variety of machining methods and tool shifting methods

Figure 1 spiral cutting (SP only in the field of mold special steel materials)

spiral machining of contour. Spiral machining is to do spiral cutting downward along the closed contour. There is no advance or retreat tool in the middle, and the cutting process is continuous and constant. From the process mode management table, click create-mill-usr, right-click, and click the appearance of Heli degradable material in the NC folder, overturning this impression cprf DLL, defining parameters can generate spiral cutter path (Figure 1). Cycloid contour machining. When selecting profile processing, it is recommended to select trochoid high-speed tool walking in the process parameter interface. The advantage of this method is that it can ensure that the machine tool can remove the blank material with the most challenging process parameters, so as to improve the cutting efficiency of the machine tool. It is suitable for machining narrow grooves and cavities of high hard materials (above HRC50) (as shown in Figure 2)

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