Most of our country's power tool companies are small and medium enterprises. These companies have insufficient R&D capabilities and only possess some local brands. Participation in international competition is usually carried out using an OEM approach. This approach requires that the product development cycle be as short as possible to meet the changing needs of the market.
In recent years, the starting design concept of power tool products has changed a lot. In the past, focusing on the functional design of products, a product was often sold in many places after its design was completed, 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, the interior of the product has little or no change, but the appearance of the product has changed. In this way, the design work is mainly on the shape design of the product.
In the past, when we were engaged in the design of exterior shapes, we first completed the two-dimensional outline drawings, and then the molders worked out models of wood or other materials according to the drawings. This process depends more on the experience of the molder and the accuracy of the two-dimensional map. At the same time, the designer and the molder must have more exchanges. Only in this way can the accuracy of the shape design be guaranteed. The process is complicated and design changes are very difficult.
Now, thanks to the popularity of computers and the increasing capability of engineering software applications, we can accelerate this process and improve its accuracy through computer-aided technology. This is called CAD technology.
In fact, the design concepts proposed by some international companies reflect the effects of bionics and ergonomics on the appearance of the tool. The initial design is often an artistic rendering. We must design the shape of our existing products to meet this need, which puts higher requirements on the appearance.
When we design a new tool, we may first obtain a rendering or design concept. We must combine our own existing products to design the two-dimensional space shape and internal structure. At the same time, we must carry out the necessary structural and safety analysis to obtain a two-dimensional contour profile. This profile should reflect as much as possible the key section information. These cross-sections should be verified in the two-dimensional map and can usually be implemented using common CAD software, such as those using AUTOCAD and CAXA. The next task is to turn this 2D outline drawing computer file 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 of all, we must put each section together in 3D software and ensure that the relative position of each section is accurate. After completing this step, we will get a three-dimensional block diagram with a key section, and then perform three-dimensional modeling on this basis. It must be noted that because of the complexity of the shape of the power tools, it is difficult to obtain the shape we want with the solid modeling functions provided by the CAD software. Only using surface modeling can achieve the goal. Surface modeling has a lot of flexibility, and it can realize the modeling of complex objects.
Use the surface modeling function provided by CAD software to complete the modeling of some regular surfaces, then edit these surfaces, and then use the advanced surface modeling function to connect these surfaces to get a three-dimensional surface modeling. With this three-dimensional surface modeling, we can observe its shape in the computer's virtual environment and compare it with the shape we need. In the computer environment to modify, if necessary, the shape can be processed through CAM technology for intuitive observation and comparison. We finally get a 3D surface shape that meets our needs. This design process, the design of the shape will be completed by the designer, there is no intermediate links, to ensure the integrity and correctness of the original design intent.
After the surface modeling is completed, we edit the surface based on the surface to obtain a wall-thick solid. Then on the basis of this entity, the solid modeling function provided by CAD software is used to increase the internal structure and finally complete the modeling of the entire part. In fact, surface modeling and solid modeling are combined in the entire modeling process. This is the work with the greatest workload and the greatest difficulty when designing with CAD technology.
After the modeling of all parts is completed, we can perform virtual assembly in the CAD software environment and perform interference inspection and operation analysis of the assembly as a whole. At the same time, important safety structures can be inspected. When necessary, the physical properties of each part can be set. The mechanical and physical properties of each part can be analyzed to achieve the purpose of optimizing the design. In this way, the reliability and accuracy of the design can be greatly improved.
If it is a brand-new structural design, we can use rapid prototyping technology to obtain an exactly the same part as the three-dimensional CAD model for physical assembly, safety structure analysis and related experiments. This avoids the loss of other costs due to structural design errors.
Thanks to the three-dimensional solid modeling, we can use the functions provided by CAD software to obtain the two-dimensional part drawings, and then edit these parts drawings to get the engineering drawings for production and inspection.
Similarly, with 3D modeling, CAD models can be used to directly apply these styling to the design and manufacture of molds. In this way, the production cycle of the mold will be greatly shortened, and possible errors will be minimized.
The design of power tools began to meet the needs of the function. Now, due to the extensive use of ergonomics and bionics on power tools, the shape design of power tools has become the most important part of the entire tool design. With the development of modern automated processing technology, mold manufacturing must also use three-dimensional solid modeling. Therefore, the use of CAD technology is a must for power tool design. Reasonable use of CAD technology to meet the needs of business development in order to participate in fierce international competition.
In recent years, the starting design concept of power tool products has changed a lot. In the past, focusing on the functional design of products, a product was often sold in many places after its design was completed, 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, the interior of the product has little or no change, but the appearance of the product has changed. In this way, the design work is mainly on the shape design of the product.
In the past, when we were engaged in the design of exterior shapes, we first completed the two-dimensional outline drawings, and then the molders worked out models of wood or other materials according to the drawings. This process depends more on the experience of the molder and the accuracy of the two-dimensional map. At the same time, the designer and the molder must have more exchanges. Only in this way can the accuracy of the shape design be guaranteed. The process is complicated and design changes are very difficult.
Now, thanks to the popularity of computers and the increasing capability of engineering software applications, we can accelerate this process and improve its accuracy through computer-aided technology. This is called CAD technology.
In fact, the design concepts proposed by some international companies reflect the effects of bionics and ergonomics on the appearance of the tool. The initial design is often an artistic rendering. We must design the shape of our existing products to meet this need, which puts higher requirements on the appearance.
When we design a new tool, we may first obtain a rendering or design concept. We must combine our own existing products to design the two-dimensional space shape and internal structure. At the same time, we must carry out the necessary structural and safety analysis to obtain a two-dimensional contour profile. This profile should reflect as much as possible the key section information. These cross-sections should be verified in the two-dimensional map and can usually be implemented using common CAD software, such as those using AUTOCAD and CAXA. The next task is to turn this 2D outline drawing computer file 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 of all, we must put each section together in 3D software and ensure that the relative position of each section is accurate. After completing this step, we will get a three-dimensional block diagram with a key section, and then perform three-dimensional modeling on this basis. It must be noted that because of the complexity of the shape of the power tools, it is difficult to obtain the shape we want with the solid modeling functions provided by the CAD software. Only using surface modeling can achieve the goal. Surface modeling has a lot of flexibility, and it can realize the modeling of complex objects.
Use the surface modeling function provided by CAD software to complete the modeling of some regular surfaces, then edit these surfaces, and then use the advanced surface modeling function to connect these surfaces to get a three-dimensional surface modeling. With this three-dimensional surface modeling, we can observe its shape in the computer's virtual environment and compare it with the shape we need. In the computer environment to modify, if necessary, the shape can be processed through CAM technology for intuitive observation and comparison. We finally get a 3D surface shape that meets our needs. This design process, the design of the shape will be completed by the designer, there is no intermediate links, to ensure the integrity and correctness of the original design intent.
After the surface modeling is completed, we edit the surface based on the surface to obtain a wall-thick solid. Then on the basis of this entity, the solid modeling function provided by CAD software is used to increase the internal structure and finally complete the modeling of the entire part. In fact, surface modeling and solid modeling are combined in the entire modeling process. This is the work with the greatest workload and the greatest difficulty when designing with CAD technology.
After the modeling of all parts is completed, we can perform virtual assembly in the CAD software environment and perform interference inspection and operation analysis of the assembly as a whole. At the same time, important safety structures can be inspected. When necessary, the physical properties of each part can be set. The mechanical and physical properties of each part can be analyzed to achieve the purpose of optimizing the design. In this way, the reliability and accuracy of the design can be greatly improved.
If it is a brand-new structural design, we can use rapid prototyping technology to obtain an exactly the same part as the three-dimensional CAD model for physical assembly, safety structure analysis and related experiments. This avoids the loss of other costs due to structural design errors.
Thanks to the three-dimensional solid modeling, we can use the functions provided by CAD software to obtain the two-dimensional part drawings, and then edit these parts drawings to get the engineering drawings for production and inspection.
Similarly, with 3D modeling, CAD models can be used to directly apply these styling to the design and manufacture of molds. In this way, the production cycle of the mold will be greatly shortened, and possible errors will be minimized.
The design of power tools began to meet the needs of the function. Now, due to the extensive use of ergonomics and bionics on power tools, the shape design of power tools has become the most important part of the entire tool design. With the development of modern automated processing technology, mold manufacturing must also use three-dimensional solid modeling. Therefore, the use of CAD technology is a must for power tool design. Reasonable use of CAD technology to meet the needs of business development in order to participate in fierce international competition.
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