Technology research and application of high-speed machining of automobile injection molds

1. Research on the mechanism of high-speed cutting

The development time of high-speed cutting technology at home and abroad is short, and there are still many contents in the cutting mechanism that still need further research and improvement, mainly in the cutting force, cutting heat, tool wear and machining Surface conditions will be significantly different from the phenomena and results of conventional machining counterparts. The lack of high-speed cutting mechanism will hinder the in-depth application of high-speed cutting technology. Therefore, the research on high-speed cutting mechanism should be carried out first to deepen the understanding of high-speed cutting technology for technicians and operators, and make full use of high-speed cutting technology to cover automobile coverage. Parts molds for efficient and high-quality processing.

2. Optimization of high-speed cutting parameters

Practice has proved that using reasonable processing parameters under certain equipment, materials and processing strategies will greatly improve work efficiency, and achieve a combination of processing efficiency, tool wear and processing quality. Therefore, the optimization of machining parameters in the high-speed machining of auto panel molds is an important technical link to improve work efficiency and the machining quality of auto panel molds.

3. Research on high-speed machining strategy of complex mold surface

An important prerequisite for successful high-speed machining is to withstand a near-constant cutting load, which can ensure good high-speed machining results under such conditions. For complex mold surfaces, it is necessary to study the machining strategy with small volume change of material removed and constant cutting load during machining to avoid rapid tool wear and reduce tool yielding error.

4. Establishment of high-speed machining and cutting database for automobile injection molds

The high-speed machining cutting database stores data such as high-speed cutting parameters for technicians and operators to query and use, and plays an important role in managing process data and assisting technicians in process planning. In order to improve the work efficiency of technicians and operators and promote the stable and sustainable development of enterprises, it is imperative to establish a cutting database for high-speed machining of automotive panel molds.

Technical means of high-speed cutting technology research of automobile injection mold

1. Cutting machining finite element simulation technology

The rapid development of computer technology has made it possible to use numerical simulation methods to study the cutting process and the relationship between various parameters. The finite element simulation technology of metal cutting, which began in the 1970s, has also been developed in the development of computer technology. Great progress. The finite element simulation of metal cutting takes into account material properties, tool geometry, cutting parameters (cutting speed, feed, depth of cut) and cutting force loads, thermal loads and residual stresses caused by cutting. On the basis of experimental assistance and verification, the action process of the relative motion of the tool and the part in the virtual cutting process, the dynamic physical simulation of the chip forming process, can display the machining behavior and the internal stress, strain, strain rate and temperature of the machined part It can predict the processing quality of parts and the wear and tear of tools by analyzing the distribution of physical quantities. Furthermore, by optimizing the process parameters, the machining quality of the parts can be improved, the wear degree of the tool can be effectively reduced, and the expensive cost and time required to determine the new process using the traditional trial and error method can be reduced. In addition, when simulating metal cutting, it is possible to define the relationship between relevant factors (machining parameters, tool geometry, and upper limits of heat and force) and the material removal rate. Under the premise of ensuring the machining quality of the parts, the material removal rate can be improved by changing the cutting parameters, so as to achieve the purpose of improving the productivity.

The high-speed cutting processing mechanism and processing parameter optimization technology of automobile panel molds involve materials science, mechanics, metal physics, machinery manufacturing and other disciplines, which have been difficult to solve in the field of CNC machining. The existing CAM software can only perform CNC programming according to the surface features of the parts to ensure that the tool position trajectory does not collide and interfere, but it is difficult to ensure that the processed parts are also optimal in physical goals such as surface quality and tool life, which often results in product failure. The precision is low and the tool wear is serious, so Z-optimization analysis of the high-speed cutting process is a difficult but very important subject. From the above overview of the finite element simulation technology of cutting, it is an effective measure to solve the practical problem by taking the road of combining digital simulation and experimental research. Finite element simulation of cutting process and chip forming process provides a new and more effective analysis method for in-depth study of cutting mechanism and improvement of cutting quality.