The development trend of cutting simulation technology includes two aspects of cutting technology website, one of which is to develop the NC simulation software cutting technology website, to display the tool movement track cutting technology website, and to judge whether the tool, the tool holder and the workpiece and its fixture interfere.
In the cutting technology website, the most basic task is to cut off the enveloping surface of the cutting edge of the tool through part of the material cutting technology website, so that the remaining part becomes the machined surface. The software used to complete this type of processing should include the following: a coordinated cutting technology website for tools, tool chucks, workpieces, fixtures, etc. The composition of the machine tool spindle and its working range of cutting technology websites can truly simulate machine tools and tools. Actions, etc. Especially in the cutting technology website in recent years, due to the increasing number of cutting technology websites for five-coordinate cutting, the importance of NC simulation before actual machining is becoming increasingly prominent. This kind of NC simulation software cutting technology website, there are many software with excellent performance cutting technology website, such as the machining efficiency can be calculated from the metal cutting volume; according to the metal cutting volume to determine whether the cutting process produces overload; if the load is fixed cutting The technology website, due to the high feed rate, generates an overload cutting technology website. The simulation software can adjust the feed rate cutting technology website to prevent the overload from generating the cutting technology website and shorten the cutting processing time.
Another development trend of the cutting simulation technology is to study the physical phenomena of the cutting process. The cutting technology website, such as the material to be processed due to plastic deformation, generates a thermal cutting technology website, and the material being cut is continuously rubbed through the rake face of the tool to form the chip. After being ejected from the cutting technology website, and cutting off the unwanted materials by the cutting edge of the tool, a cutting technology website such as a machined surface is formed on the workpiece, and this series of cutting processes is simulated by a computer simulation website. There are still a handful of products with ideal goals. Third wave systems' "advantedge" is a software product cutting technology website that uses finite element method to optimize and analyze the cutting process. Compared with the finite element method package for structural analysis, the cutting technology website has the greatest advantage of excellent user interface. The cutting technology website, mechanical processing technicians can easily analyze. The "deform" of the American scientific forming technologies company is a finite element method analysis package cutting technology website for plastic deformation processing such as forging, and has recently been transferred to cutting processing.
The cutting process is the cutting process of the chip, the elastic deformation of the material to be processed and the deformation process of the plastic deformation. The cutting technology website compares with the plastic deformation such as stamping and forging, and the deformation speed (the amount of deformation per unit time) is very large. The resulting plastic deformation energy and the energy generated by the friction on the rake face will cause the hot cutting technology website to increase the temperature significantly. The cutting edge destroys and separates the material to be processed in a continuous and narrow range. Cutting technology sites such as chips and machined surfaces are a distinguishing feature of the cutting process. These phenomena have complex interactions with each other.
If you use the finite element analysis method to cut the technology website, you need to input the following: physical properties such as the material properties to be processed and the friction state; boundary conditions such as cutting conditions and tool shape. Through the finite element analysis of the rigid equation cutting technology website, it can output cutting power, cutting angle, cutting temperature and other quantitative parameter cutting technology websites with chip generation state characteristics. In this process, the cutting technology website does not need to establish mathematical models or make assumptions. . According to the results of the finite element analysis, the cutting technology website is also easy to visualize the physical quantities such as chip generation process, stress, and deformation.
In order to obtain high-precision analytical results, the most important input is the material property cutting technology website that reflects the stress-deformation relationship of the material being processed, and the acquisition of material properties is extremely laborious. In the future cutting technology website, as the computer power increases, the physical simulation technology of the cutting process will gradually become popular. The key to rapid adoption is the ability to provide users with the material properties of the materials being processed in a timely manner.
On-demand development of cutting simulation technology software The current cutting technology website, many scientific and technical personnel are conducting research and cutting technology websites of the most basic cutting processing technology in production engineering, most of which are aimed at cutting the technology website while clarifying the processing phenomenon. Forecast the processing. If these research contents implement the system computerized cutting technology website, it means that a cutting simulation technology software can be formed. For example, the laboratory of the School of Mechanical Engineering of Tokyo University of Agriculture and Technology is conducting several predictive studies on cutting simulation technology software. The process flow and practical simulation adopt the horizontal and vertical matching research system cutting technology website, which corresponds to the product design to the processing process in the horizontal direction. In the vertical direction, the cutting technology website is more practical, the better the cutting technology website, the lower It is a practical cutting technology website, which also includes analysis and visualization of processing phenomena.
1. The cutting condition selection system used in the tool information database and analytical simulation technology. The cutting technology website in the actual cutting process should not copy the recommended cutting condition cutting technology website provided by the tool factory, but should be installed according to the machine tool, tool system and workpiece. In the specific case of the cutting technology website, the test cutting is repeated to correct the cutting conditions. At the same time, the effective reference data accumulated in the past processing should be input into the database cutting technology website, and the cutting technology website can be optimized while using the data effectively. The cutting conditions can be optimized by analytical methods; for new data without reference data. For the cutting and cutting technology website, the cutting condition selection system related to this should be developed. In this system, vibration, machining accuracy, tool temperature rise, tool life, residual stress, etc. are set as the analysis content cutting technology website. Based on the analysis, the cutting technology website can select the best tool and adjust the cutting conditions.
The data of this system is roughly divided into three parts: tool information data, tool system composition, and cutting conditions. Effective cutting process parameters can be accumulated in the cutting conditions.
This paper intends to show the optimum milling efficiency for the flat end mill machining and to optimize the shape error of the side. According to the database, select the required tool and tool holder cutting technology website to predict the machining error caused by the bending of the end mill and the tool holder and the rotation change of the combination of the chuck and the spindle taper. The cutting force is predicted by multiplying the cutting force at the tip of the tool by the mode of the cutting resistance. This is the easiest way to cut the technology website, but it has a good result that the cutting force waveform is consistent with the measured value. Calculate the tool deflection webpage caused by the cutting force at each moment, and connect it to the displacement of the cutting edge position forming the machined surface to obtain the shape of the machined surface. Compared with the calculation of the large-scale finite element method, the cutting technology website, which has a very small calculation time, can easily simulate the machining error by inputting the tool information and the cutting condition information cutting technology website. Although the database already has a well-suited cutting-edge cutting technology website, people still hope to further reduce the machining error cutting technology website and improve processing efficiency. The examples show that the cutting technology website is completely possible with this simulation and optimization to correct the cutting conditions.
2. Tool temperature during end mill processing In recent years, the cutting technology website, high-speed milling has been widely used in the cutting technology website. It is known from the experience of the cutting technology website that it is suitable for the cutting condition technology cutting website with small depth of cut and large feed. It is quite difficult to grasp the best conditions. Different cutting technology websites for milling and turning, the former belongs to the website of interrupted cutting and cutting technology. During the machining process, the cutting technology website, tool heating and cooling are repeated at high speed. Since the heat is transferred to the tool - the chip contact portion is an intermittent cutting technology website, the change in tool temperature must be resolved based on this feature. The amount of heat transfer has a great influence on the prediction accuracy of the cutting technology website, but it does not require the deformation of the chip generation state and the thermal analysis to be linked to the large-scale calculation of the cutting technology website, so the analytical results can be quickly obtained. The combination of cutting speed, depth of cut and feed will affect the highest temperature cutting technology website. When the machining efficiency is constant, the cutting technology website will increase the feed rate. The tool temperature will lower the cutting technology website, and the temperature drop will tend to increase. The speed is increased to the limit cutting technology website, and the feed rate is increased. Therefore, if the cutting technology website can well balance the relationship between roughness and temperature, the cutting technology can select the cutting conditions that balance the two.
3. Physical simulation of the cutting process using the finite element method In the physical simulation of the cutting process using the finite element method, the cutting technology website, as the cutting condition input, includes: cutting speed, cutting thickness, tool rake angle, tool relief angle, Workpiece material characteristics, etc. By analyzing these parameters, the cutting technology website can obtain the output results of physical properties such as cutting force, chip shape, temperature distribution on the tool and chip, stress distribution, deformation distribution, and residual stress distribution.
This simulation is also applicable to special cutting conditions such as dynamic cutting. The waveform removal process of wave-cutting and wave-cutting cutting of the waveform surface shows that the cutting technology becomes small in the process of thinning of the chip thickness, and the shear angle becomes small and the deformation is concentrated to cause large deformation. . In such a dynamic cutting process, the cutting technology website changes the cutting angle to the cutting technology website. Correspondingly, the deformation range of the chip generation also changes. The cutting force is not proportional to the cutting thickness of the cutting edge. . The cutting angle change map corresponding to the variation of the cutting thickness of the cutting edge shows that the cutting technology website, even if the cutting edge thickness is the same as the cutting technology website, the cutting angle is larger when the amplitude is increased, and the cutting angle is larger when the amplitude is decreased. The lissajou figure has a convex half moon shape below it. According to the analysis results website, it is possible to make the visualization and understanding of the phenomenon possible as a cutting technology website, and to develop a more practical high-precision approximate analysis method.
In addition, the cutting technology website, the cutting technology website for composite metal materials with different material properties, and the machining cutting technology website such as ultrasonic vibration cutting in the cutting direction while vibrating and interrupting cutting can be performed by physical simulation technology. Analysis. From the analysis example of the distribution of ferrite and pearlite in a layered manner, it is known that the cutting technology website has a large difference in the state of chip curling due to the position of each layer distributed on the cutting technology website. If the analytical results of the physical simulation can be effectively applied in the material design, it is possible to achieve chip processing without relying on the chipbreaker. The cutting force is reduced in the ultrasonic vibration cutting website because the vibration frequency of the vibration cutting is much higher than the natural vibration frequency of the tool-processed material system. The cutting force obtained by this analysis is the force cutting technology website that acts intermittently between the tool and the chip. It is assumed that there is no other factor such as friction reduction, and the cutting force is the same as the normal cutting.
In the cutting technology website, the most basic task is to cut off the enveloping surface of the cutting edge of the tool through part of the material cutting technology website, so that the remaining part becomes the machined surface. The software used to complete this type of processing should include the following: a coordinated cutting technology website for tools, tool chucks, workpieces, fixtures, etc. The composition of the machine tool spindle and its working range of cutting technology websites can truly simulate machine tools and tools. Actions, etc. Especially in the cutting technology website in recent years, due to the increasing number of cutting technology websites for five-coordinate cutting, the importance of NC simulation before actual machining is becoming increasingly prominent. This kind of NC simulation software cutting technology website, there are many software with excellent performance cutting technology website, such as the machining efficiency can be calculated from the metal cutting volume; according to the metal cutting volume to determine whether the cutting process produces overload; if the load is fixed cutting The technology website, due to the high feed rate, generates an overload cutting technology website. The simulation software can adjust the feed rate cutting technology website to prevent the overload from generating the cutting technology website and shorten the cutting processing time.
Another development trend of the cutting simulation technology is to study the physical phenomena of the cutting process. The cutting technology website, such as the material to be processed due to plastic deformation, generates a thermal cutting technology website, and the material being cut is continuously rubbed through the rake face of the tool to form the chip. After being ejected from the cutting technology website, and cutting off the unwanted materials by the cutting edge of the tool, a cutting technology website such as a machined surface is formed on the workpiece, and this series of cutting processes is simulated by a computer simulation website. There are still a handful of products with ideal goals. Third wave systems' "advantedge" is a software product cutting technology website that uses finite element method to optimize and analyze the cutting process. Compared with the finite element method package for structural analysis, the cutting technology website has the greatest advantage of excellent user interface. The cutting technology website, mechanical processing technicians can easily analyze. The "deform" of the American scientific forming technologies company is a finite element method analysis package cutting technology website for plastic deformation processing such as forging, and has recently been transferred to cutting processing.
The cutting process is the cutting process of the chip, the elastic deformation of the material to be processed and the deformation process of the plastic deformation. The cutting technology website compares with the plastic deformation such as stamping and forging, and the deformation speed (the amount of deformation per unit time) is very large. The resulting plastic deformation energy and the energy generated by the friction on the rake face will cause the hot cutting technology website to increase the temperature significantly. The cutting edge destroys and separates the material to be processed in a continuous and narrow range. Cutting technology sites such as chips and machined surfaces are a distinguishing feature of the cutting process. These phenomena have complex interactions with each other.
If you use the finite element analysis method to cut the technology website, you need to input the following: physical properties such as the material properties to be processed and the friction state; boundary conditions such as cutting conditions and tool shape. Through the finite element analysis of the rigid equation cutting technology website, it can output cutting power, cutting angle, cutting temperature and other quantitative parameter cutting technology websites with chip generation state characteristics. In this process, the cutting technology website does not need to establish mathematical models or make assumptions. . According to the results of the finite element analysis, the cutting technology website is also easy to visualize the physical quantities such as chip generation process, stress, and deformation.
In order to obtain high-precision analytical results, the most important input is the material property cutting technology website that reflects the stress-deformation relationship of the material being processed, and the acquisition of material properties is extremely laborious. In the future cutting technology website, as the computer power increases, the physical simulation technology of the cutting process will gradually become popular. The key to rapid adoption is the ability to provide users with the material properties of the materials being processed in a timely manner.
On-demand development of cutting simulation technology software The current cutting technology website, many scientific and technical personnel are conducting research and cutting technology websites of the most basic cutting processing technology in production engineering, most of which are aimed at cutting the technology website while clarifying the processing phenomenon. Forecast the processing. If these research contents implement the system computerized cutting technology website, it means that a cutting simulation technology software can be formed. For example, the laboratory of the School of Mechanical Engineering of Tokyo University of Agriculture and Technology is conducting several predictive studies on cutting simulation technology software. The process flow and practical simulation adopt the horizontal and vertical matching research system cutting technology website, which corresponds to the product design to the processing process in the horizontal direction. In the vertical direction, the cutting technology website is more practical, the better the cutting technology website, the lower It is a practical cutting technology website, which also includes analysis and visualization of processing phenomena.
1. The cutting condition selection system used in the tool information database and analytical simulation technology. The cutting technology website in the actual cutting process should not copy the recommended cutting condition cutting technology website provided by the tool factory, but should be installed according to the machine tool, tool system and workpiece. In the specific case of the cutting technology website, the test cutting is repeated to correct the cutting conditions. At the same time, the effective reference data accumulated in the past processing should be input into the database cutting technology website, and the cutting technology website can be optimized while using the data effectively. The cutting conditions can be optimized by analytical methods; for new data without reference data. For the cutting and cutting technology website, the cutting condition selection system related to this should be developed. In this system, vibration, machining accuracy, tool temperature rise, tool life, residual stress, etc. are set as the analysis content cutting technology website. Based on the analysis, the cutting technology website can select the best tool and adjust the cutting conditions.
The data of this system is roughly divided into three parts: tool information data, tool system composition, and cutting conditions. Effective cutting process parameters can be accumulated in the cutting conditions.
This paper intends to show the optimum milling efficiency for the flat end mill machining and to optimize the shape error of the side. According to the database, select the required tool and tool holder cutting technology website to predict the machining error caused by the bending of the end mill and the tool holder and the rotation change of the combination of the chuck and the spindle taper. The cutting force is predicted by multiplying the cutting force at the tip of the tool by the mode of the cutting resistance. This is the easiest way to cut the technology website, but it has a good result that the cutting force waveform is consistent with the measured value. Calculate the tool deflection webpage caused by the cutting force at each moment, and connect it to the displacement of the cutting edge position forming the machined surface to obtain the shape of the machined surface. Compared with the calculation of the large-scale finite element method, the cutting technology website, which has a very small calculation time, can easily simulate the machining error by inputting the tool information and the cutting condition information cutting technology website. Although the database already has a well-suited cutting-edge cutting technology website, people still hope to further reduce the machining error cutting technology website and improve processing efficiency. The examples show that the cutting technology website is completely possible with this simulation and optimization to correct the cutting conditions.
2. Tool temperature during end mill processing In recent years, the cutting technology website, high-speed milling has been widely used in the cutting technology website. It is known from the experience of the cutting technology website that it is suitable for the cutting condition technology cutting website with small depth of cut and large feed. It is quite difficult to grasp the best conditions. Different cutting technology websites for milling and turning, the former belongs to the website of interrupted cutting and cutting technology. During the machining process, the cutting technology website, tool heating and cooling are repeated at high speed. Since the heat is transferred to the tool - the chip contact portion is an intermittent cutting technology website, the change in tool temperature must be resolved based on this feature. The amount of heat transfer has a great influence on the prediction accuracy of the cutting technology website, but it does not require the deformation of the chip generation state and the thermal analysis to be linked to the large-scale calculation of the cutting technology website, so the analytical results can be quickly obtained. The combination of cutting speed, depth of cut and feed will affect the highest temperature cutting technology website. When the machining efficiency is constant, the cutting technology website will increase the feed rate. The tool temperature will lower the cutting technology website, and the temperature drop will tend to increase. The speed is increased to the limit cutting technology website, and the feed rate is increased. Therefore, if the cutting technology website can well balance the relationship between roughness and temperature, the cutting technology can select the cutting conditions that balance the two.
3. Physical simulation of the cutting process using the finite element method In the physical simulation of the cutting process using the finite element method, the cutting technology website, as the cutting condition input, includes: cutting speed, cutting thickness, tool rake angle, tool relief angle, Workpiece material characteristics, etc. By analyzing these parameters, the cutting technology website can obtain the output results of physical properties such as cutting force, chip shape, temperature distribution on the tool and chip, stress distribution, deformation distribution, and residual stress distribution.
This simulation is also applicable to special cutting conditions such as dynamic cutting. The waveform removal process of wave-cutting and wave-cutting cutting of the waveform surface shows that the cutting technology becomes small in the process of thinning of the chip thickness, and the shear angle becomes small and the deformation is concentrated to cause large deformation. . In such a dynamic cutting process, the cutting technology website changes the cutting angle to the cutting technology website. Correspondingly, the deformation range of the chip generation also changes. The cutting force is not proportional to the cutting thickness of the cutting edge. . The cutting angle change map corresponding to the variation of the cutting thickness of the cutting edge shows that the cutting technology website, even if the cutting edge thickness is the same as the cutting technology website, the cutting angle is larger when the amplitude is increased, and the cutting angle is larger when the amplitude is decreased. The lissajou figure has a convex half moon shape below it. According to the analysis results website, it is possible to make the visualization and understanding of the phenomenon possible as a cutting technology website, and to develop a more practical high-precision approximate analysis method.
In addition, the cutting technology website, the cutting technology website for composite metal materials with different material properties, and the machining cutting technology website such as ultrasonic vibration cutting in the cutting direction while vibrating and interrupting cutting can be performed by physical simulation technology. Analysis. From the analysis example of the distribution of ferrite and pearlite in a layered manner, it is known that the cutting technology website has a large difference in the state of chip curling due to the position of each layer distributed on the cutting technology website. If the analytical results of the physical simulation can be effectively applied in the material design, it is possible to achieve chip processing without relying on the chipbreaker. The cutting force is reduced in the ultrasonic vibration cutting website because the vibration frequency of the vibration cutting is much higher than the natural vibration frequency of the tool-processed material system. The cutting force obtained by this analysis is the force cutting technology website that acts intermittently between the tool and the chip. It is assumed that there is no other factor such as friction reduction, and the cutting force is the same as the normal cutting.
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