What are the finishing processes for mold parts?
Precision mold processing found in the actual machining process, when using fixed shaft milling in the past, if the default circular interpolation method of UG is selected, the output PTP file capacity will be larger, especially the 45 degree finishing. On a machine with a slightly poor read-ahead ability, if a higher feed rate is used, the surface of the workpiece will have a different degree of knives, which will greatly reduce the surface finish. In the repeated experiments, we found a suitable solution, and chose another circular interpolation method provided by UG. In this way, the processed ptp file is greatly reduced, which makes the machine's read-ahead load. Reduced, it is easy to maintain a very high finish and surface quality at higher feed rates. (mold parts)
Excessive free-range movement in the tool path is also a big taboo for HSM. Selecting the offset path in rough precision tooling can reduce many unnecessary jumps, usually better than parallel machining paths, and greatly saves the thickness. Time, the tool maintains a constant cutting force and extends the service life. Rich cut-in and cut-out methods meet the requirements of high-speed machining to a great extent. In addition, it also has a unique area filtering function. For a beef nose knife without central cutting force, UG can use this function to filter out the path of some processing dead zone, and Propose a warning to avoid a broken knife accident. While UG CAD uses powerful post-parameterization tools to modify or simplify model features that do not require milling, it is undoubtedly an option for efficiency and processing safety.
High-speed precision mold processing requires high machine tool performance, tool clamping system, tool quality, machined parts, and CAM software. All parts require excellent quality to complete the process. The most influential one is CAM software. HSM puts very high demands on CAM software: full automatic over-cutting processing capability and automatic tool holder interference inspection, rich processing strategy in line with high-speed machining requirements, high calculation programming speed and powerful intelligent operation. And UG has a perfect interpretation of the above requirements, processing software is changing with each passing day, and Unigraphics CAM has always danced to the top of the industry, which is the main reason we choose UG.
The molding of the mold requires two polishing processes, and it has been difficult to ensure the required angularity of the plastic parts. In modern mold processing, high-speed CNC machine tools are used to directly mill high-quality smooth surfaces, and small diameter tools are used for deep cavity or clear angle high-speed machining to reduce EDM, high-speed and low-load cutting, and low-speed high-load cutting. It is a general trend to cut materials faster, reduce thermal deformation, and improve mold production efficiency. It can be called a revolution in the machining industry. Traditional processes have always used EDM as the final finishing step in precision tooling. Its advantage is that the detection of the electrode before processing can better control the dimensional accuracy of the machined part, there is no hard interference during the processing, the heat distribution is small, and the surface finish is better than that of the ordinary CNC machine tool. However, it also has some shortcomings, which makes it difficult to produce precision molds, especially those that are extremely important in appearance. The processing and inspection of the rough electrode will take a long time.
(mold parts pictures)