Application of the hottest UG contour cutting in d

The application of UG contour cutting in mold

mold is one of the most common and advanced industries using cad/cam at present. In the mold processing, in order to make the data can be applied in the NC machine tool, it is necessary to use CAM programming. At present, the popular CAM software includes UG, Cimatron, Mastercam, Delcam PowerMILL, Edgecam, HZS space-e, etc

in the development process of UG, cam has always been the most reliable working partner of processing industry. It not only provides reliable and accurate tool path, but also allows NC programmers to design the most effective machining program at will. Cimdata's survey report points out that EDS UG is regarded as the strongest competitor among all CAM software suppliers

ug cam has the following characteristics:

(1) provide reliable and accurate tool path

(2) it can be processed directly on surfaces and solids

(3) a good user interface allows users to customize the user interface according to work needs, which can not only improve operation efficiency, but also effectively use and save the company's know how

(4) provide a variety of machining methods to facilitate NC programmers to design various efficient tool paths

(5) provide 4: the tool library and processing parameter library management function of the mechanical environment experiment set out in the domestic and foreign mechanical environment experiment method standards, so that new employees can make full use of the experience of senior personnel to design excellent tool paths

(6) provide universal post-processing function to generate NC programs applicable to all NC processing machines

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

contour cutting

contour cutting is mainly used in mold processing under the processing conditions that require uniform force on the tool. The application of contour cutting can complete 80% of the workload in NC machining. 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 during machining is too large, it is often necessary to use contour cutting to reduce the force on the tool. At present, the most popular high-speed cutting machine tool is also the user of contour cutting

(1) there are no restrictions on the use of tools

nc programmers can freely choose flat knives, ball knives, round nose knives, T-shaped knives and other tools for contour cutting according to the performance of the machining machine tool, blank materials, clamping methods and consideration of 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

(2) automatically detect the undercut area

ug can automatically detect the undercut area within the processing range and automatically calculate the best tool path. When milling with T-knife, if the tool handle does not interfere with the machining surface, UG will make the most complete cutting as far as possible. Because the flat cutter is used for cutting, in the undercut area, the tool path generated by UG is based on the principle that the tool does not touch the machining surface

(3) provide a variety of tool path types

UG contour cutting provides multiple cutting, one-way cutting, spiral cutting, edge cutting and multi-layer edge cutting. Among them, multi-layer edge cutting can provide high-efficiency rough workpiece processing path, and it is also a good choice for deep and steep machining surface finishing. High speed cutting machine tools can use this function to generate good machining paths. Each depth of the tool path of multi-layer cutting along the edge produces three tool paths, the first is 3mm away from the finished surface, the second is 1mm away from the finished surface, and the third is processed on the finished surface

(4) produce a processing path with uniform force on the tool

during mold processing, the NC program designer and the manufacturer of the "fluorite hydrofluoric acid fine fluorochemical industry fluoropolymer" industry chain or machine tool operator often have to reduce the feed rate of the overall path in order to avoid the severe loss of the tool caused by excessive local force on the tool in the NC program, thus affecting the whole processing efficiency. 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 angle)

(5) set different cutting depths in different height areas

in order to leave uniform and gather more ecological enterprise blanks after processing, and at the same time do not consume unnecessary processing time, UG can provide users to set different cutting depths in different height areas according to the shape characteristics of the processed workpiece. When finishing multi-layer machining along the surface, you can set a larger cutting depth in the steep area and a smaller cutting depth in the gentle area

(6) have the concept of processing materials and finished products

the operation of processing materials and finished products enables users to conveniently calculate contour rough machining and finish machining without modifying CAD models. It is very convenient to make NC program for die electrode and slider

(7) 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, which can automatically handle within the tolerance range set by the user. Next, Jinan experimental machine factory will briefly introduce the specific operation steps of the low-temperature groove of the impact sample, and manage the gap and overlap between the surfaces, so as to produce a good tool path

(8) on individual machined 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 wall thickness, mold closing surface, breaking surface and general finished product surface. In order to facilitate the NC programmer to set the NC program on a single CAD model, UG allows the NC designer to set different reservations (positive and negative values) on individual machined surfaces to improve the design efficiency of the NC program

(9) 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. (end)