The hottest Cimatron in pentahedral machining cent

2022-08-01
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Cimatron in the pentahedral machining center

the pentahedral machining center can ensure that after one-time clamping, it can complete the machining of multiple surfaces, that is, after one-time clamping, the workpiece can be machined on five surfaces except the bottom surface. It also has the functions of vertical machining center and horizontal machining center. It can ensure the position tolerance of the workpiece and good dimensional consistency in the machining process. However, the pentahedral machining center has complex structure, advanced control system and high cost. In order to give full play to its efficiency, higher requirements are put forward for the corresponding cad/cam software. Because Cimatron 11.0 cad/cam software has more flexible coordinate transformation functions and rich processing methods, it can better meet the requirements of pentahedral machining center. This paper takes the mcr-bii pentahedral machining center produced by Okuma company in Japan as an example to illustrate the application of Cimatron cad/cam software in pentahedral machining center. The environmental pollution of the plastic granulator in the whole processing process is also quite serious, as shown in Figure 1. Assuming that the bottom surface of the box shown in Figure 2 has been machined, the bottom surface is taken as the reference plane and also as the installation plane. It is required to machine the upper top surface, the surrounding large surface and the R surface. The mcr-bii pentahedral machining center has a multi-functional milling head with B and C axes, with a minimum graduation of 5 °, a variable range of b axis angle of 0 ~ 90 °, and a variable range of C axis angle of 0 ~ 360 °

the annual consumption of plastic raw materials for thickening 5m is nearly 6million tons m. The W grinding plate extruder can be used to adjust the combination of grinding plates to adapt to the rough machining of the top surface and cavity by cut method of different high filling materials. The mechanical coordinates are shown in Fig. 2. The Z axis is vertical upward, and the coordinate point is the workpiece origin. The machining range is the maximum contour of the upper top surface, and some machining paths are shown in Figure 2. At this time, the angle of axis B and C of the pentahedral machining center is b=0 °, c=0 °, which is similar to the milling method of ordinary machining centers

according to the mechanical coordinates shown in Figure 3, the srfpkt machining method shall be applied to parallel milling the side. At this time, the angle of axis B and C is b=90 °, c=270 °. When milling the R transition surface of two intersecting surfaces, pay attention to the forward and reverse milling methods to avoid over cutting. Other surfaces are similar. Coordinate rotation is divided into two steps: the first step is to establish a UCS coordinate system. Click the auxiliary menu UCS Jinan laboratory machine service system in the right menu of Cimatron, click create in its submenu, create a new UCS coordinate name, and then enter several ways to establish UCS. Here, select origin+rot, then select the reference coordinate system, that is, the coordinate system to be rotated, and specify the rotation origin. When asked whether to rotate, After selecting Yes, select UCS to specify the rotation axis and determine the angle, that is, to establish a new UCS coordinate system; The second step is to establish the machining machine coordinate system corresponding to UCS. The specific method is to click active in the UCS submenu, define the selected UCS as the current UCS coordinate system, select display in the UCS submenu, and display the selected UCS coordinates on the current screen. After entering the NC system, when asked about creating a macsys, select Yes to establish the machining machine coordinate system macsys corresponding to the current UCS

III. what is worth emphasizing in this paper is the method of machining the front r surface. When the vertical milling of the tool is not feasible due to the limitation of the tool length, it can be carried out at a certain angle. At the same time, when there are other features on the R surface, it is difficult to directly select the processing range, and it is easy to cause the penetration of the tool, resulting in the collision between the tool and the workpiece. Therefore, it is necessary to establish an auxiliary reference surface, as shown in Figure 4, Project the external contour of the part to be machined onto the auxiliary plane vertically

when processing with srfpkt mode, it is ideal to select the contour projected on the auxiliary plane as the processing range. See Figure 4 for machining path. During formal machining, the angles of axis B and C of pentahedral machining center are b=45 ° and c=0 ° respectively. How to select cutting tools and machining parameters are not discussed in this paper

of course, after the post-processing of the machining path, the program still needs to be checked to make it meet the performance requirements of the machine tool, so as to prevent interference in the process of advancing, withdrawing and changing tools. From the above, it can be seen that the problem can be solved satisfactorily by using the coordinate transformation function of Cimatron 11.0 cad/cam and flexible machining methods, so that the performance of the pentahedral machining center can be brought into full play

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