Application of the hottest contour cutting in mold

2022-08-15
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Application of contour cutting in mold processing

during the development of UG, cam has always been the most reliable and workpiece partner of processing industry. It not only provides reliable and accurate tool path, but also allows NC programmers to design the most efficient machining program at will. According to the survey report of cimdata last year, UG is regarded as the strongest competitor among all CAM software suppliers

ugcam has the following characteristics:

provide reliable and accurate tool path

can be processed directly on surfaces and solids

a good user interface allows users to customize the user interface according to work needs, which can not only improve operation efficiency, but also make good use of and save the company's konw how

provides a variety of machining methods, which makes it convenient for NC programmers to design various efficient tool paths

provide a complete tool library and processing parameter library management function, so that new employees can make full use of the experience of senior personnel to design excellent tool paths

provide universal post-processing function to generate NC programs applicable to each NC machine

ugcam includes functions such as 2-axis to 5-axis milling, ó machine milling, wire cutting, large tool library management, solid simulation cutting and universal post processor. In this paper, the author will introduce the application of three-axis milling medium high cutting in mold processing

contour cutting

contour cutting is mainly used in mold processing under processing conditions that require uniform force on the tool. For example, in rough machining, the tool is generally under great force, so contour cutting can limit the force on the tool within a range by controlling the cutting depth. In addition, in medium or finish machining, if the machining part is too steep, too deep, and needs to extend and lengthen the blade, due to the tool is too long, and the deflection is too large during machining, it is often necessary to use contour cutting to reduce the force on the tool. At present, the most popular high-speed cutting machine is also the user of contour cutting

The contour cutting function of UG not only provides a variety of machining methods, but also allows the tool to make the fastest and best cutting under the uniform stress state energy in the whole machining process. The following are the characteristics of UG contour cutting

there are no restrictions on the use of tools

nc programmers can freely choose flat knives, ball knives, round nose knives, t-knives and other tools for equal height cutting according to the performance of the tool machine, the material of the blank, the clamping method and the cutting efficiency. In terms of calculation, UG uses the selected tool to calculate along the machining surface, so it can produce an accurate tool path. Figure 1 and Figure 2 show the tool path of cutting with a T-knife, and figure 3 shows the tool path of cutting with a flat knife (the thin line is the tool path)

automatic detection of undercut

ug can automatically detect the undercut area within the processing range and automatically calculate the best tool path. As shown in Figure 2, when milling with a T-knife, if the tool handle does not interfere with the machining surface, UG will make the most complete cutting as far as possible. In Figure 3, due to the use of flat cutter cutting, in the undercut area, the tool path generated by UG is based on the principle that the whole tool does not touch the machining surface

provide diversified tool path types

ug contour cutting for compound cutting, one-way cutting, spiral cutting, edge cutting and multi-layer edge cutting. Among them, multi-layer edge cutting provides a high-efficiency rough workpiece processing path, and it is also a good choice for deep and steep machining surface finishing. High speed cutting machines can use this function to produce good machining paths. Figure 4 shows the tool path of multi-layer edge cutting. Three tool paths are generated at each depth. The first one can be printed 3mm away from the finished surface if the microcomputer function is strong, the second one is 1mm away from the finished surface, and the third one is processed on the finished surface

produce a machining path with uniform tool force

when machining a mold, NC programmers or machine operators often reduce the feed rate of the overall path and affect the whole machining efficiency in order to avoid the situation that the local force on the tool is too large in the NC program, resulting in serious tool loss. UG provides various feed rate setting methods to solve this problem. The user can set the feed rate of the local force on the tool (such as the first tool cutting, when the tool path reciprocates, when the tool path turns)

set different cutting depths in different height areas

in order to leave uniform blank after processing without unnecessary processing time. UG provides users to set different cutting depths in different height areas according to the shape characteristics of the workpiece. As shown in Figure 5, when doing multi-layer machining along the surface, we set a larger cutting depth in the steep area and a smaller cutting depth in the gentle area

it has the concept of processing materials and finished products

and the operation of processing materials and finished products in a wide range of temperatures, so that users can easily calculate contour roughing and finishing without modifying CAD models. It is very convenient to make NC program for die electrode and slider. The dotted line in Figure 6 and Figure 7 is the shape of processing material, Figure 6 is an example of reciprocating contour rough cutting, and Figure 7 is the tool path of contour surface finishing

with tolerance cutting function

the CAD data received by the mold industry is often IGES files provided by the upstream. Therefore, there are often gaps and overlaps between the surfaces of CAD models used for machining. UG provides tolerance cutting function. Within the tolerance range set by the user, it can automatically deal with the gap and overlap between surfaces, and produce a good seismic response to a very low tool path

on individual machining surfaces, different machining reserves can be set

in mold design, due to the specification of finished product geometry, it is often necessary to define different meat thickness, mold closing surface, breaking surface and general finished product surface. In order for NC programmers to set NC programs on a single CAD model, UG allows NC designers to set different reservations (positive and negative values) on individual machined surfaces to improve the design efficiency of NC programs

provide a variety of tool advance/retreat modes

ug contour cutting provides a variety of tool advance/retreat modes such as straight line, broken line and arc to meet the needs of actual processing. Users can set different pre drilling positions and drilling depths in different depth areas or processing areas at the same time. UG can also automatically determine the pre drilling feed or oblique feed according to the machining geometry and tool definition, so as to meet the actual machining requirements

conclusion

the above are UG and so on, so the application of high cutting in mold. In the future, the author will introduce the most vivid projection processing in UGCAM, such as mold processing, intermediate processing, finishing and automatic corner clearing

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