Most of the power tool companies in China are small and medium enterprises. These companies have insufficient R&D capabilities and only have some local brands. Participating in international competition is usually done in an OEM way. This approach requires that the product development cycle be as short as possible to accommodate the changing needs of the market. In recent years, the concept of the beginning of power tool products has changed a lot. In the past, attention was paid to the functional design of products, which often sold many places after the completion of a product design, and its life cycle was more than 10 years. Nowadays, due to the needs of the market, the life cycle of mainstream products is only 3-4 years. Usually, there is little or no change inside the product, but the shape of the product has changed. In this way, the design work is mainly in the shape design of the product. In the past, we used the shape design to complete the 2D outline drawing, and then the molder processed the wood or the model of the material according to the drawing. Such a process relies more on the experience of the molder and the accuracy of the two-dimensional map, and the designer and the molder have more communication. Only in this way can the shape design be accurate. The process is complex and design changes are very difficult. Now, due to the popularity of computers and the enhancement of engineering software application capabilities, we can accelerate this process and improve its accuracy through computer-aided technology. This is called CAD technology. In fact, some international companies have proposed a design concept that reflects bionics and ergonomics in the shape of the tool. The initial design is often an art rendering. We must design the shape of our existing products to meet this need, which puts higher demands on the shape. When we design a new tool, the first thing we can get is a rendering or some design concept. We must combine our existing products for two-dimensional spatial shape and internal structural design, and at the same time carry out the necessary structural and safety analysis to obtain a two-dimensional outline drawing. This outline should reflect as much information as possible about some key sections. These sections should be validated in a two-dimensional map and can usually be implemented using common CAD software, such as software such as AUTOCAD and CAXA. The next task is to convert the computer file of this 2D outline drawing into a 3D file. Due to the complex shape of power tools, high-end CAD design software such as CATIA, PROIE, UG and MASTERCAM must be used. First, we must place the sections together in 3D software and ensure that the relative positions of the sections are accurate. After completing this step, we will get a 3D block diagram with key sections and then perform 3D modeling on this basis. It must be noted that due to the complexity of the shape of the power tool, it is difficult to obtain the shape we want with the solid modeling function provided by the CAD software. Only by using surface modeling can the goal be achieved. Surface modeling has great flexibility and can be used to shape complex objects. Using the surface modeling function provided by CAD software, first complete the modeling of some regular surfaces, then edit these surfaces, and then use advanced surface modeling to connect these surfaces to obtain a three-dimensional surface modeling. With this three-dimensional surface modeling, we can observe the shape in the virtual environment of the computer and compare it with the shape we need. Modifications are made in the computer environment, and if necessary, the shape can be processed by CAM technology for intuitive observation and comparison. The result is a three-dimensional surface shape that meets our needs. This design process, the design of the shape will be completed by the designer, without intermediate links, to ensure the integrity and original design intent. After the surface modeling is completed, we edit the surface based on this surface to get a solid body with a wall thickness. Then, based on this entity, the physical modeling function provided by the CAD software is used to increase the internal structure, and finally the entire part is finished. In fact, surface modeling and solid modeling are combined in the entire modeling process. This is the work with the largest workload and the greatest difficulty when designing with CAD technology. Next page Triangle Glass Mosaics Pattern
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