Automotive stamping dies have high processing quality requirements due to their heavy load and impact conditions. Among them, the blanking part has the characteristics of high material hardness and anti-wear due to the processing surface, and its processing precision also has a great influence on the overall appearance quality of the vehicle body. Therefore, the processing of this part has always been one of the technical problems that plague the processor. Under the traditional process, due to the improper application strategy of the tool and the excessive number of times of tool clamping, the processing time of the workpiece is too long, generally about 10.5h. The technicians of our company's mold application center have carefully analyzed the process, and proposed a new process plan, which effectively reduced the idler stroke and reduced the clamping time, and finally shortened the processing time to 4h. Determining the process improvement scheme Due to the complexity and particularity of the shape of the mold parts, in practice, it is difficult to prepare the manufacturing process according to a certain fixed mode. Due to the different equipment conditions and technical levels, the manufacturers have completely completed the process. Different, but the principles of the process of preparation and the basic guiding ideology are similar. 1. Learn more about customer needs Visiting customers is the main way to understand customer needs. It is generally through contact with customers' existing production process arrangements by providing technical support to customers and solving difficult problems in on-site practice. In such a process, technicians can easily find unreasonable or imperfect links in the process arrangement, collect the information, and organize it into the “Customer Process Analysis Report†to analyze the bottlenecks and improvements in the current processing process for customers. The goal is expected to be achieved. 2. Develop detailed project planning After the customer understands the bottleneck problem in the current existing process, we must work with the customer's technical staff to study a reasonable solution to the problem. Because the new processing technology plan must rely on the customer's existing production conditions, in order to bring the greatest benefits to customers. 3. Develop a processing strategy After discussing with the customer's technical staff to determine the process improvement plan, we will bring the project back to the mold application center, and the application engineer will develop a programming strategy for the improved process, thereby determining the appropriate tool and processing parameters. 4. Test and commissioning Test the determined processing plan and compare the obtained processing result with the expected target, thereby debugging and optimizing the processing parameters until satisfactory processing results are achieved, and relevant written reports are generated. 5. Practice Inspection The processing technology plan that has been formulated and verified by the application center is transplanted to the customer site for actual processing. Due to changes in production conditions, some problems sometimes occur during processing, and technicians need to make further adjustments until the customer is satisfied. Proper selection and use of tool tools is a direct participant in surface cutting. Knowing and being familiar with the tool's machining conditions is a prerequisite for proper tool selection. When selecting a tool, in addition to the tool's own factors, such as material, coating, groove, length and diameter, it is necessary to fully consider the relevant processing factors, such as processing materials, cooling methods, spindle rigidity and fixture stability. . In this case, we used the non-standard tool shown in Figure 3, which reduced the workpiece clamping time and reduced the non-machining time of the Machine. At the same time, we have adopted our latest carbide tool products, which greatly increases the processing speed and thus greatly reduces the processing time. Optimizing the tool path In the CAD/CAM integrated system, the process design of CNC machining determines the quality and efficiency of actual production and processing. The planning of the tool path during machining has an important influence on the preparation of the process specification and the generation of the NC code, which in turn affects the machining accuracy, surface roughness and machining speed of the part. Therefore, the tool path is the soul of the tool. The use of professional programming software and advanced machining strategies can help reduce the tool's idle time, while smoothing the path also helps to reduce the loss of machining speed during the process, thus increasing the processing speed and shortening the processing cycle. Correct choice of cooling method With the application of green manufacturing technology in cutting processing, which cooling method is more appropriate, it should be carefully weighed according to different processing purposes and the characteristics of the material to be processed to obtain the best processing results. At present, there are many alternative cooling methods in metal cutting, such as cutting fluid cooling, spray cooling and high pressure air cooling. In this case, after repeated comparisons, we finally chose the air oil mist mixing and cooling method, which not only improved the machining parameters of the tool, but also avoided the adverse effect of the coolant cooling on the tool chilling and the tool life, thus improving the tool's The service life reduces the processing cost of the customer. Conclusion The rapid development of the automotive industry has driven the progress of the mold industry. Especially in the production of automotive stamping dies, the technical quality requirements are getting higher and higher. How to help users achieve efficient and low-cost processing under the premise of ensuring quality, and share successful experiences with customers through various flexible methods such as training and technical seminars, and improve the technical level for customers. It is Sandvik Coromant Tool Application Center. The responsibility is. In the application case of this article, the technicians carefully reduced and processed the processing time of the customer's products from the initial 10.5h to 4h, and the Sandvik Coromant collaborated with the customer through careful analysis and optimization of various process steps in the process. The design model of the mold was modified as appropriate, so that the processing time was shortened again and finally controlled at 3.3h.
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