High-speed machining is a new advantage in auto parts manufacturing
2019-07-03 10:06:16
For workpieces with a large amount of material to be removed, workpieces with complex structures or ultra-thin structures (such as engine blocks, cylinder heads, automotive cover molds, etc.) traditionally require considerable man-hours and faster design, product cycle Short workpieces, through high-speed machining center machining, can show the advantages of high-speed cutting.
Manufacturing technology for automotive engines and their accessories
The high-speed machining center is made up of high-efficiency flexible production lines with the characteristics of miniaturization, flexible protrusion and easy change of processing contents, in order to take advantage of high-speed machining technology and automatic tool change function represented by turning machining centers and milling and boring machining centers. To improve the processing efficiency, the principle of centralized processing should be adopted as much as possible for the processing of complex workpieces, that is, it is required to realize the centralized processing of multiple processes in one clamping, and to dilute the boundaries of different cutting processes such as traditional car, milling, boring and thread processing. Take full advantage of the high-speed cutting function of equipment and tools .
At the same time, the tool also puts forward a new multi-functional requirement, requiring a tool to complete the different processes of the workpiece, reducing the number of tool changes, saving time, reducing the number of tools and inventory, which is beneficial to management and reduce manufacturing costs. More commonly used multi-function turning tools, milling cutters, boring and milling cutters, drilling, milling threads, chamfering and other tools . The use of some specific process strategies in the mass production line, the need to develop special tools to improve processing efficiency and accuracy, reduce investment, special tool processing efficiency can reduce the processing time of parts to less than 10%, the effect is very significant.
New technology for processing automotive parts and parts
One type of car often requires thousands of parts and molds. In order to adapt to the needs of new models as soon as possible, automotive interior and exterior cover molds and other forming molds must shorten the production cycle and reduce production and production. Automobile interior and exterior covers, instrument panels, etc. are mostly manufactured in batches using injection molds. These injection molds are generally complex and thin-shell structures. Ordinary cutting operations often fail to meet the accuracy requirements of surface roughness and curvature. It also needs to be properly hand-finished. Therefore, high-speed machining is the preferred process solution for such mold manufacturing. After the high-speed, less-cut finishing of the mold, the workload of the fitter is greatly reduced, and the mold manufacturing cycle can be shortened by 40%.
1. High-speed milling technology
High-speed milling technology has significant advantages in processing 3D curved surfaces and super-hard materials. The high-speed milling method is used to process the mold, not only adopting high speed and large feed, but also rough and finishing can be completed at one time, which greatly improves the processing efficiency of the cover mold. When high-speed machining is used for hardened steel molds with hardness above 60HRC and surface roughness Ra=0.6μm, the level of grinding can be achieved, and the efficiency is several times higher than that of electric machining, which not only saves a lot of light repair time, but also can replace Most of the electrical processing steps.
For example, automotive cover molds are mostly composed of various free-form surfaces. High-speed milling uses high-speed, small-depth-depth, and large-feed processing methods to improve the manufacturing precision of molds and extend the service life of molds, thereby improving the quality of injection molded parts. . Moreover, under the condition of large feed speed, the high-speed milling machine has high-precision positioning function and high-precision interpolation function, especially the arc high-precision interpolation. For example, for the finishing of the front wall baffle stamping die, it is mainly guaranteed. The quality of the profile. Under normal circumstances, large-area finishing requires that the milling cutter or the cutting edge is not changed during the milling process, and the milling of the entire profile is completed at one time. This requires a high degree of precision and durability for the milling cutter, and the high-speed cutting technology features high speed. Cutting speed, micro feed rate and multiple cutting finishing process can meet the requirements of freeform surface processing of the cover mold. In order to ensure that the feeding process is easy to feed during the stamping process, the processing blade should be used in the same direction as the feeding direction of the stamping material.
2. High-speed feed cutting technology
As a key technology to improve production efficiency, in addition to high-speed cutting, there is also a high-speed feed technology. Under the premise that the cutting speed remains unchanged, increasing the feed rate can proportionally improve the cutting efficiency. When the cutting depth is relatively shallow, the cutting edge of the tool must have a specific shape when cutting with a large feed amount.
In order to avoid vibration, the proportion of the feed force in the total cutting force must not exceed the main cutting force. When the cutting depth is relatively shallow and the workpiece material is properly heat treated , the feed rate can be from 380 to 500 mm/min. Increase to 540 ~ 620 mm / min.
Another feature of the high-speed feed technology is that the machine load can be reduced under the same productivity, the corresponding power consumption is less, and the tool wear is reduced. However, the high-speed feed cutting technology also requires the necessary investment, that is, the The machine table must have a high-speed feed function.
In addition, the real advantage of high-speed feed processing technology is that after the one-time processing process is completed, there is no need to use other tools for subsequent processing. The introduction of high-speed feed cutting technology not only improves production efficiency, but also improves investment efficiency. .
Conclusion
The development of energy-saving, miniaturization and electrification of automobile products has become an inevitable trend, especially the diversification of automobile products, the wide field coverage of vehicle models, and the fast pace of mass production. These characteristics put forward higher manufacturing processes and equipment. Claim. High-speed machining is bound to lead the new trend in automotive parts processing.
Manufacturing technology for automotive engines and their accessories
The high-speed machining center is made up of high-efficiency flexible production lines with the characteristics of miniaturization, flexible protrusion and easy change of processing contents, in order to take advantage of high-speed machining technology and automatic tool change function represented by turning machining centers and milling and boring machining centers. To improve the processing efficiency, the principle of centralized processing should be adopted as much as possible for the processing of complex workpieces, that is, it is required to realize the centralized processing of multiple processes in one clamping, and to dilute the boundaries of different cutting processes such as traditional car, milling, boring and thread processing. Take full advantage of the high-speed cutting function of equipment and tools .
At the same time, the tool also puts forward a new multi-functional requirement, requiring a tool to complete the different processes of the workpiece, reducing the number of tool changes, saving time, reducing the number of tools and inventory, which is beneficial to management and reduce manufacturing costs. More commonly used multi-function turning tools, milling cutters, boring and milling cutters, drilling, milling threads, chamfering and other tools . The use of some specific process strategies in the mass production line, the need to develop special tools to improve processing efficiency and accuracy, reduce investment, special tool processing efficiency can reduce the processing time of parts to less than 10%, the effect is very significant.
New technology for processing automotive parts and parts
One type of car often requires thousands of parts and molds. In order to adapt to the needs of new models as soon as possible, automotive interior and exterior cover molds and other forming molds must shorten the production cycle and reduce production and production. Automobile interior and exterior covers, instrument panels, etc. are mostly manufactured in batches using injection molds. These injection molds are generally complex and thin-shell structures. Ordinary cutting operations often fail to meet the accuracy requirements of surface roughness and curvature. It also needs to be properly hand-finished. Therefore, high-speed machining is the preferred process solution for such mold manufacturing. After the high-speed, less-cut finishing of the mold, the workload of the fitter is greatly reduced, and the mold manufacturing cycle can be shortened by 40%.
1. High-speed milling technology
High-speed milling technology has significant advantages in processing 3D curved surfaces and super-hard materials. The high-speed milling method is used to process the mold, not only adopting high speed and large feed, but also rough and finishing can be completed at one time, which greatly improves the processing efficiency of the cover mold. When high-speed machining is used for hardened steel molds with hardness above 60HRC and surface roughness Ra=0.6μm, the level of grinding can be achieved, and the efficiency is several times higher than that of electric machining, which not only saves a lot of light repair time, but also can replace Most of the electrical processing steps.
For example, automotive cover molds are mostly composed of various free-form surfaces. High-speed milling uses high-speed, small-depth-depth, and large-feed processing methods to improve the manufacturing precision of molds and extend the service life of molds, thereby improving the quality of injection molded parts. . Moreover, under the condition of large feed speed, the high-speed milling machine has high-precision positioning function and high-precision interpolation function, especially the arc high-precision interpolation. For example, for the finishing of the front wall baffle stamping die, it is mainly guaranteed. The quality of the profile. Under normal circumstances, large-area finishing requires that the milling cutter or the cutting edge is not changed during the milling process, and the milling of the entire profile is completed at one time. This requires a high degree of precision and durability for the milling cutter, and the high-speed cutting technology features high speed. Cutting speed, micro feed rate and multiple cutting finishing process can meet the requirements of freeform surface processing of the cover mold. In order to ensure that the feeding process is easy to feed during the stamping process, the processing blade should be used in the same direction as the feeding direction of the stamping material.
2. High-speed feed cutting technology
As a key technology to improve production efficiency, in addition to high-speed cutting, there is also a high-speed feed technology. Under the premise that the cutting speed remains unchanged, increasing the feed rate can proportionally improve the cutting efficiency. When the cutting depth is relatively shallow, the cutting edge of the tool must have a specific shape when cutting with a large feed amount.
In order to avoid vibration, the proportion of the feed force in the total cutting force must not exceed the main cutting force. When the cutting depth is relatively shallow and the workpiece material is properly heat treated , the feed rate can be from 380 to 500 mm/min. Increase to 540 ~ 620 mm / min.
Another feature of the high-speed feed technology is that the machine load can be reduced under the same productivity, the corresponding power consumption is less, and the tool wear is reduced. However, the high-speed feed cutting technology also requires the necessary investment, that is, the The machine table must have a high-speed feed function.
In addition, the real advantage of high-speed feed processing technology is that after the one-time processing process is completed, there is no need to use other tools for subsequent processing. The introduction of high-speed feed cutting technology not only improves production efficiency, but also improves investment efficiency. .
Conclusion
The development of energy-saving, miniaturization and electrification of automobile products has become an inevitable trend, especially the diversification of automobile products, the wide field coverage of vehicle models, and the fast pace of mass production. These characteristics put forward higher manufacturing processes and equipment. Claim. High-speed machining is bound to lead the new trend in automotive parts processing.
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