Aluminum Anodized Sheet is one type of Aluminum Sheet which has surface anodized treatment.Aluminum anodized sheet is good in performance condition which requires high corrosion resistance.Regularly after casting the aluminum sheet,the surface of the sheet is with natural oxide film which is good to prevent the aluminum sheet from oxidation.Also the aluminum anodized sheet is with a shining surface sometimes which is good in some application which requires good surface condition.However,the anodic oxidation process is very costly and it requires lots of treatment in the wastage.Hence the cost of the aluminium anodized sheet will be higher than regular sheet as well.
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Based on a large number of research and combined with our previous manufacturing experience, we have determined the processing technology of the part. The machining process of the parts is as follows: forging - roughing (remaining margin) - flaw detection - normalizing - car (tooth top circle and its Both sides of the car, the remaining outer circle and end face to leave the balance) - flaw detection - coarse hobbing - pliers (edge ​​edge blunt) - carburizing - car (car to carburizing layer) - quenching - shot peening - car (fine Machining hobbing belt) ―Semi-finishing hobbing (semi-finishing roller, residual grinding margin)--fine car (fine car outer circle and end face, outer ring leaving grinding allowance, center through hole at both ends Hole) - 镗 (roughing center through hole) - artificial aging - 镗 (finishing center through hole) - tong (with plug) - grinding (grinding outer circle) - tong (removing plug) - grinding (grinding Toothed surface) - check - clamp (edge ​​is blunt).
Key processes in manufacturing (1) Process planning of the center through hole As can be seen from the part drawing of the part, the through hole in the center of the part is large, and the wall thickness of the part is thin. If it is simple to process, it will pass through the center before carburizing and quenching. The hole is processed (the hardness of the part is greatly improved after carburizing and quenching), and the carburizing and quenching will cause great deformation. In order to ensure the processing of the tooth, the tooth surface must leave a large margin, which will inevitably result in semi-finishing hobbing. The wear of the carbide hob is intensified and the efficiency is low, leaving a boss at the root of the tooth during grinding. In order to overcome the above drawbacks, the process is arranged after carburizing and quenching, and the center through hole is machined by a cemented carbide tool on a high-precision boring machine.
(2) Arrangement of semi-finishing hobbing and center through hole processing steps In order to effectively prevent deformation of parts due to redistribution of stress during processing, we arrange most of the metal removal amount before finishing, and arrange semi-finishing on the process. After the hobbing, the center hole is machined, and the semi-finishing hobbing retains the remaining amount of 0.40~0.50mm. After the semi-finishing hobbing, the outer circle of the finishing car, the outer circle retains the grinding allowance and the finishing car exits the center through hole. End guide hole.
The process arrangement is as follows: After carburizing and quenching, the finishing gear of the finishing car hoisting belt - semi-finishing hobbing - pressing the tooth to find the right - finishing the outer circle - each outer circle leaving the grinding allowance - fine car out of the center through hole two End Guide Holes - The high-precision boring machine uses a carbide tool to machine the center through hole.
(3) Processing process of the center through hole The center through hole of the part is large, and the wall thickness of the part is thin. In order to effectively prevent the outer ring and the inner hole from being deformed after the part is punched out of the center through hole, the process is arranged in a thick process. On the processing boring machine, the center through hole is smashed, leaving a quantity of 10mm. The artificial aging process is arranged before the fine boring. After the part is placed for 48h, the fine boring is performed, the through hole of the center is passed, and the two ends are refined in the fine boring process. Plug positioning surface.
(4) Arrangement of the grinding process The center of the part has a large through hole and the wall thickness of the part is thin. After the center through hole is processed, the stress is redistributed, which will inevitably cause deformation of the outer circle of the part. The grinding process of the outer circle is arranged in the center. After the hole is processed. Practice has proved that the maximum deformation of the outer circle after machining through the center through hole is 0.15mm. After the center through hole processing, the outer circle process is arranged to remove the deformation and ensure the shape tolerance of the part.
(5) Arrangement of grinding process The accuracy of this part is grade 5 (GB10095-88). In order to ensure the machining accuracy of the parts, the process is arranged on the high-precision CNC gear grinding machine to grind the teeth, and the flange end of the parts is stuck when grinding the teeth. The outer circle is corrected according to the shaft diameter that has been ground, and the radial runout tolerance is 0.015 mm. The relevant data is correctly input, and the teeth are finely ground to ensure the drawing requirements.
The conclusion proves that it is a practical and feasible method to process large-module hard-toothed hollow shaft gears according to this technological scheme, which fully meets the technical requirements of the drawings.
Large mold gear face shaft development process