When using wire EDM to machine impellers, there are the following advantages and applicable scenarios:
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- Jens 작성
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3.2 Milling process
The milling of drum shaft parts is mainly front and rear end "lace" milling. The technical requirements for the size of the flange surface "lace" . 48 semicircular "laces" of R6.35mm are distributed along the circumferential direction of the flange end face. Using φ11.8mm carbide coated milling cutter.
In milling, the application of coated tools and the optimisation of milling processing parameters have effectively reduced tool costs and improved the overall machining efficiency of the parts.
In terms of the clamping method for turning machining, try to use the self-centering chuck for clamping and positioning. Because the self-centering chuck has a self-centering function, the clamping, positioning and alignment can be realized quickly after the parts are clamped, which can save Unnecessary auxiliary preparation time effectively improves processing efficiency.
High-precision machining: Wire EDM is a non-contact machining method that cuts the material by electric spark discharge, so it can achieve very high machining accuracy. This is very important for applications that require high-precision impeller contours, such as aerospace, automotive, and energy industries.
Complex shape machining: Wire EDM can be used to machine impellers with complex shapes, including spiral blades and very small blades. Since wire EDM is based on pre-programmed paths, it can achieve almost any shape of impeller.
Hard material machining: Impellers are usually made of high-strength and wear-resistant materials, such as titanium alloys, nickel-based alloys, etc. Wire EDM can effectively machine these hard materials because it does not rely on traditional cutting tools, but cuts by electric spark discharge.
Deformation-free machining: Since wire EDM is non-contact machining, it does not apply large forces or heat-affected zones, so deformation of the material can be avoided. This is very important for applications that need to maintain the shape and dimensional stability of the impeller.
Mass production and automation: Wire EDM can be applied to situations where impellers are produced in large quantities. Once the program is written, it can be processed continuously in an automated manner to improve production efficiency.
In general, the advantages of wire cutting impellers are high precision and complex shape processing capabilities, suitable for hard materials and applications that require shape stability. It is an advanced processing method suitable for specific impeller requirements.
(3) Crankshaft main journal and connecting rod neck fillet rolling machine tool
The rolling machine is used to improve the fatigue strength of the crankshaft. According to statistics, the crankshaft life of the ductile iron crankshaft after fillet rolling can be increased by 120% to 230%; the life of the forged steel crankshaft can be increased by 70% to 130% after fillet rolling. The rotational power of rolling comes from the rotation of the crankshaft, which drives the rollers in the rolling head to rotate, and the pressure of the rollers is implemented by the oil cylinder.
(2) After the engine is repaired, the vehicle has not passed the running-in period, that is, it is overloaded and overslung, and the engine is overloaded for a long time, so that the crankshaft load exceeds the allowable limit.
3 Processing methods
The main processing technology of drum shaft parts is turning, drilling and milling "lace", and the special technology mainly includes fluorescent inspection, shot peening and static balancing.
3.1 Turning process
The cutting speed is 200m/min, the feed rate is 0.25mm/r, and the cutting depth is 2mm. When the tool is fed, the method of alternately oblique feeding and linear feeding is adopted. Due to the typical weak rigid structure. To avoid the problem of tool vibration, try to use the solution of wrapping a rubber rope sleeve on the outside of the part, which can effectively increase the rigidity of the cantilever of the part and reduce the "resonance" in the turning process phenomenon, thereby basically eliminating the problem of turning tool vibration, and the final surface roughness and wall thickness variation all meet the technical requirements. The processing effect after increasing the rigidity of the cantilever is shown in the figure.
The high-pressure turbine is one of the key components of an aero-engine. The high-pressure turbine drum shaft connects the high-pressure turbine and the high-pressure compressor, and is the main component for Xavier transmitting engine torque. The connecting position of the drum shaft in the aero-engine is shown in Figure 1.
CNC cutting is a more reasonable processing method of cutting processing, and is also a common process for the precision machining of aluminum alloy. It uses a vertical mill, spiral cutting interpolation and the like, and the like. Tools are processed on a small hole.
Aluminum alloy precision parts and products are welcome because of light weight and exquisite and exquisite, the applications in industrial areas and daily necessities are increasingly wide. Especially in recent years, with the development of science and technology, the demand for product diversity is getting stronger. Therefore, the better the process of aluminum alloy products, the more favored by people, the greater the market demand, the higher the benefits. CNC machining is one of the best processing methods of current aluminum alloy shell products.
The milling of drum shaft parts is mainly front and rear end "lace" milling. The technical requirements for the size of the flange surface "lace" . 48 semicircular "laces" of R6.35mm are distributed along the circumferential direction of the flange end face. Using φ11.8mm carbide coated milling cutter.
In milling, the application of coated tools and the optimisation of milling processing parameters have effectively reduced tool costs and improved the overall machining efficiency of the parts.
In terms of the clamping method for turning machining, try to use the self-centering chuck for clamping and positioning. Because the self-centering chuck has a self-centering function, the clamping, positioning and alignment can be realized quickly after the parts are clamped, which can save Unnecessary auxiliary preparation time effectively improves processing efficiency.
High-precision machining: Wire EDM is a non-contact machining method that cuts the material by electric spark discharge, so it can achieve very high machining accuracy. This is very important for applications that require high-precision impeller contours, such as aerospace, automotive, and energy industries.
Complex shape machining: Wire EDM can be used to machine impellers with complex shapes, including spiral blades and very small blades. Since wire EDM is based on pre-programmed paths, it can achieve almost any shape of impeller.
Hard material machining: Impellers are usually made of high-strength and wear-resistant materials, such as titanium alloys, nickel-based alloys, etc. Wire EDM can effectively machine these hard materials because it does not rely on traditional cutting tools, but cuts by electric spark discharge.
Deformation-free machining: Since wire EDM is non-contact machining, it does not apply large forces or heat-affected zones, so deformation of the material can be avoided. This is very important for applications that need to maintain the shape and dimensional stability of the impeller.
Mass production and automation: Wire EDM can be applied to situations where impellers are produced in large quantities. Once the program is written, it can be processed continuously in an automated manner to improve production efficiency.
In general, the advantages of wire cutting impellers are high precision and complex shape processing capabilities, suitable for hard materials and applications that require shape stability. It is an advanced processing method suitable for specific impeller requirements.
(3) Crankshaft main journal and connecting rod neck fillet rolling machine tool
The rolling machine is used to improve the fatigue strength of the crankshaft. According to statistics, the crankshaft life of the ductile iron crankshaft after fillet rolling can be increased by 120% to 230%; the life of the forged steel crankshaft can be increased by 70% to 130% after fillet rolling. The rotational power of rolling comes from the rotation of the crankshaft, which drives the rollers in the rolling head to rotate, and the pressure of the rollers is implemented by the oil cylinder.
(2) After the engine is repaired, the vehicle has not passed the running-in period, that is, it is overloaded and overslung, and the engine is overloaded for a long time, so that the crankshaft load exceeds the allowable limit.
3 Processing methods
The main processing technology of drum shaft parts is turning, drilling and milling "lace", and the special technology mainly includes fluorescent inspection, shot peening and static balancing.
3.1 Turning process
The cutting speed is 200m/min, the feed rate is 0.25mm/r, and the cutting depth is 2mm. When the tool is fed, the method of alternately oblique feeding and linear feeding is adopted. Due to the typical weak rigid structure. To avoid the problem of tool vibration, try to use the solution of wrapping a rubber rope sleeve on the outside of the part, which can effectively increase the rigidity of the cantilever of the part and reduce the "resonance" in the turning process phenomenon, thereby basically eliminating the problem of turning tool vibration, and the final surface roughness and wall thickness variation all meet the technical requirements. The processing effect after increasing the rigidity of the cantilever is shown in the figure.
The high-pressure turbine is one of the key components of an aero-engine. The high-pressure turbine drum shaft connects the high-pressure turbine and the high-pressure compressor, and is the main component for Xavier transmitting engine torque. The connecting position of the drum shaft in the aero-engine is shown in Figure 1.
CNC cutting is a more reasonable processing method of cutting processing, and is also a common process for the precision machining of aluminum alloy. It uses a vertical mill, spiral cutting interpolation and the like, and the like. Tools are processed on a small hole.
Aluminum alloy precision parts and products are welcome because of light weight and exquisite and exquisite, the applications in industrial areas and daily necessities are increasingly wide. Especially in recent years, with the development of science and technology, the demand for product diversity is getting stronger. Therefore, the better the process of aluminum alloy products, the more favored by people, the greater the market demand, the higher the benefits. CNC machining is one of the best processing methods of current aluminum alloy shell products.
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