Factors such as the ultimate stress of the gear material are affected
3D Aluminum Composite Panel ACP Product Line ZL3DFH1300/1600/2000 the metal composite production line which adopts high grade top and bottom aluminum coil composites with the 3D aluminum hollow core by hot pressing to form a hard,light,sandwich structre and new decoration materials.Products can be widely used in field of construction decoration such as curtain wall,interior and exterior wall of building,elevator,train body,billboards and other high-end places 3D Aluminum Composite Panel Acp Product Line,Double 3D Panel Production Line,Eps 3D Panel Production Line,3D Aluminum Composite Panel Zhangjiagang Zhong Lai Machinery Co.,Ltd. , https://www.alumajor.com
In order to avoid the disadvantages of the complicated structure, the ordinary structural form is still adopted, and the center distance and the tooth width are increased at the same time. According to the manufacturer's requirements, the center distance and tooth width are taken to be the same as the existing 3m reducer (former Soviet standard reducer). However, the existing 3m reducer has insufficient carrying capacity. Therefore, the main objective of the second scheme is to further improve the carrying capacity on the basis of the original 3m reducer. The main measures taken are: improving the material: changing the original cast steel integral large gear to the alloy steel forged steel ring gear ring structure. The gear material grade has also been further improved. This can improve the contact fatigue limit stress and the bending fatigue limit stress of the large gear, thereby improving the contact strength and bending strength of the overall reducer. The preferred transmission ratio scheme: the two-stage contact strength is similar and the bending strength is increased as much as possible, and the transmission ratio distribution scheme is optimized. The existing transmission ratio distribution calculation formula is generally derived from the principle of two-level contact strength and total gear weight. However, these formulas are based on a simplified strength formula. The factors considered are not comprehensive enough. For example, the load size, the position of the gear on the shaft, and the limit stress of the gear material affect the tooth load distribution coefficient KHβ and the tooth. The inter-load distribution coefficient KHα affects the contact strength. In this paper, computer-aided design is used to optimize the different gear ratio schemes based on accurate calculations, with the two-level contact strength and high bending strength as the main objectives.
Large pressure angle: High pressure angle can improve contact, bending strength and anti-adhesive performance, but special hob or milling cutter is required, and the bearing force is increased. Considering that the special hob is difficult and the construction period is long, the special finger milling cutter is easier and the construction period is shorter. Therefore, this scheme does not intend to adopt a large pressure angle in the high speed stage (hobbing), but only in the low speed stage. (Because the empty sipe is narrow and can only be milled), the pressure angle of 25° is adopted, which can make up for the lack of bearing capacity of the low speed grade. In order to improve the bending strength of the gear teeth as much as possible, the root transition curve is specially designed. Improve the hardness of the tooth surface: Increasing the hardness of the tooth surface is an effective measure to improve the contact strength and the bending strength of the tooth teeth.