In recent years, with the rapid development of China's mold industry, the number of mold production enterprises has increased and the scale has been large, which has made the world look impressive. In terms of automobile molds, China has become a “manufacturing power†for automotive molds, but it is not a mold. "Creating a strong country", some high-end precision mold design and processing, compared with foreign countries, there is still a big gap, some high-end precision molds still need to import from abroad, such as Germany, the United States, etc., to meet the needs of the Chinese market. At present, mold design and manufacturing technology is gradually aligning with the world, and the market competition is increasingly fierce. Customers are not only looking for better quality, lower cost, but more importantly, delivery cycle. This article mainly describes the improvement of high-end precision mold processing efficiency and the quality of mold products from the following five aspects. Among many automotive precision molds, especially continuous stamping dies, the pattern design has the following characteristics: 1 Standardization and standardization of mold design. For example, when design engineers in a foreign country design a set of precision molds, they have considered the life, the occasion, the processing method and the series of problems that may occur during the processing of the mold, and how much it can bring to the enterprise. The profit, etc., when the designer starts from the source, the design of the mold pattern will be standardized and standardized. 2 mold design drawings are highlighted. For example, when designing automotive precision stamping continuous molds, some stamping and forming precision stamping die holes or notches must be sharp and sharp, and must not have chamfers to facilitate smooth stamping of the formed parts; When bolt holes are used, the dimensional tolerances are often loose, such as x±0.1mm, x±0.5mm, etc., which in turn indicate a decimal point tolerance of ±0.1mm, integer tolerance of ±0.5mm, etc.; such labeling and complete pattern shape The tolerances are marked with key points, which makes it easier to arrange production and processing reasonably, reduce processing costs and improve delivery cycle. When the mold design work task is completed, the next important task is how to prepare the mold processing technology. The general mold processing process is: cutting → rough processing (such as car, milling reserved machining allowance) → heat treatment (such as quenching 58 ~ 62HRC, etc.) → flat grinding (end of the workpiece surface) → finishing (such as fine car, fine Milling, etc.) → fitter (deburring, lettering, etc.). Of course, there will be some technical problems in the processing process, because the mold processing is very different from the general part processing. For example, the precision dimensions of the precision mold are relatively strict. For example, the parallelism of the end faces of the mold (0.01mm) is very strict, coaxial. Degrees (0.02 mm), roundness (0.01 mm), flatness (0.03 mm), and round runout (0.02 mm) are all required. Therefore, when compiling the process, we must not only take into account the rigidity, precision, and processing stroke of the company's machine tools , but also consider whether the front and rear process is consistent and the volume is reasonable. For example, a stamping die needs to cut the stamping core in the cylinder. When arranging the process, it must take into account the radial radial retention of 6~10mm, in order to facilitate the clamping and wire cutting to meet the requirements of the drawings; at the same time, we should grasp the key details of the process, the design basis, the processing benchmark, Programming benchmarks, measurement standards, and mold assembly standards are unified to reduce cumulative errors, which are often easily overlooked, resulting in machining molds that are too poor. Therefore, considering each process and step is important for mold processing. Especially in the processing of high-end precision molds, the matching processing of machine tools is particularly important. In some state-owned enterprises or small enterprises, this phenomenon is often encountered. When using simple economical CNC machine tools to process precision mold surfaces and outer circles, there are always obvious signs of picking up. After verifying that the precision of the machine is up to The precision size requirements required for the pattern are not available. At present, some state-owned enterprises, some people only pay attention to the immediate interests, one-sidedly believe that the machine tools are more expensive, the price is too expensive, the processing cost is too expensive, and some foreign companies in Europe and the United States have the opposite view, using more advanced CNC machine tools , making full use of the machine tools Function, machine tool processing range function is maximized, machine tool no matter roughing hole type or plane, improve efficiency is very obvious, such as some advanced MAZAK, DMG machine tools abroad, the main shaft with internal cooling through hole, when roughing the die hole, can be directly The internal drilling of the high-speed drill bit directly drills the amount, and the forming of the hole can be completed once by using the forming boring cutter, thereby effectively improving the processing efficiency. Therefore, when processing precision molds, special attention must be paid to the important parameters, performance, function, precision, etc. of the machine tool , which is more conducive to improving the efficiency of mold processing. Tool selection is very important when machining precision molds. First of all, when choosing a tool for machining a tool, we should consider what it is to process the mold material. At the same time, combined with a series of tool holders and matching blade data provided by the tool manufacturer, the machining selects reasonable cutting parameters, such as for machining. Series material blades, commonly used non-metallic materials such as carbon steel, titanium alloy, aluminum, composite materials, etc., should be based on improving production efficiency when roughing the mold, suitable for back-feeding, high feed rate, medium speed; fine When processing the mold, the principle of high rotation speed, high feed rate and low knife consumption are mentioned. These specific important parameters can refer to the processing recommended parameters provided by the tool manufacturer. In the case of lathe finishing, it is often encountered when chip breaking and machining hole type mold parts, the sickle phenomenon often occurs, which is often a headache. Solution: Large R tip angle such as R0 can be used. .8mm blade to avoid this phenomenon. At present, with the rapid development of CNC machine tools , the intelligent level of CAM programming software has been improved. Complex parts or high-end precision mold processing have put forward higher requirements for CNC machine tools and programming software , which has been changed from software programming to software programming by previous manual programming. Accurately process complex parts or molds while avoiding error rates, and many companies are now using software that is suitable for their own product processing. At present, I am also using PRO/E software to program and process mold products. It is very convenient to use. Programming only needs to modify the original mold parts slightly and input relevant processing parameters, so that the mold products that meet the pattern requirements can be processed faster. Here, no matter how complicated the parts or molds are processed, it is more conducive to the improvement of the processing efficiency by selecting the appropriate processing software that you are skilled in. The improvement of high-end precision mold processing efficiency is of course related to other factors and details. In the future, with the rapid development of CNC machine tools , the level of intelligent software programming will be further improved, the process will be continuously optimized and improved, and the processing efficiency of high-end precision molds will be improved. It is imperative. Author: Ginger Guilin Electrical and Electronic Materials Technology Co., Ltd. Vendelin Faucet Decorative Cover,Decorative Outdoor Water Spigot Cover,Water Spigot Handle,Outdoor Water Tap WENZHOU HUAGUAN SANITARY WARE CO,.LTD , https://www.wzhuaguan.com 1. Inherit and carry forward the excellent design concept: standardization of mold design and standardization of process
2. Optimization and formulation of processing technology
3. Machine selection and matching
4. Tool selection and matching
5. Software use and matching
6. Conclusion