Hello everyone, the editor of your reducer Xiaobian met with you on time to share and learn. In this issue, we will learn the materials for the hardened gear reducer gear shaft. Each component of the reducer is carefully selected and produced. The choice is just like the gear shaft we said today. If you want the gear shaft to have a good life and performance, it is very important from the material blank to the processing technology. Let ’s take a look at how to choose the gear shaft material and processing technology. Kind of.
With the development of industrial production, the application of hard toothed surface reducers is becoming more and more widespread. However, due to the different working environments and different technical parameters, the requirements of some components and equipment of hard toothed surface reducers are also different. This article analyzes the material of the gear shaft of the hard tooth surface reducer, and then makes a detailed design description of the part that has a large impact on the performance of the reducer, that is, the drive shaft, and analyzes the shaft processing technology. Finally, a gear shaft was mainly designed for the drive end of the reducer. The shaft is usually made of carbon steel and alloy steel. Carbon steel is cheaper than alloy steel, has lower sensitivity to stress concentration, and is more widely used. 35 、 45 、和 50 等优质中碳钢，其中尤以 45 号钢的应用更广泛。 Carbon steels commonly used as shaft materials include high-quality medium- carbon steels such as 35 , 45 , and 50. Among them, the 45 steel is more widely used. In order to ensure mechanical properties, quenching and tempering or normalizing should generally be performed. Q235 等制作，但是这种钢不适合进行热处理，所以只限于用在不重要或者载荷较小的地方。 The hard tooth surface reducer shaft can also be made of ordinary carbon steel Q235, etc., but this steel is not suitable for heat treatment, so it is only used in places that are not important or have a small load. Alloy steel has higher mechanical strength and better hardenability, but it is more sensitive to stress concentration and expensive. For heavy loads or important shafts, shafts that require small size and light weight, shafts that require wear resistance and work in high temperature and other special environments, often use alloy steel. 20Cr 、 40Cr 、 40MnB 等。 Commonly used alloy steels are 20Cr , 40Cr , 40MnB, etc. In addition, heat treatment has less effect on alloy steel, so it is not effective to use alloy steel to improve the rigidity of the shaft.
: 基本工序，如镦粗、拔长、冲孔、扩孔、芯轴拔长、切割、弯曲、扭转、错移、锻接等，其中镦粗、拔长和冲孔三个工序应用最多 ; 辅助工序，如切肩、压痕等 ; 精整工序，如平整、整形等三类。 According to the different nature and degree of deformation of the gear shaft of the hard tooth surface reducer, the free forging process can be divided into : basic processes, such as upsetting, drawing, punching, reaming, drawing of the mandrel, cutting, bending, twisting, wrong Moving, forging, etc., the three processes of upsetting, drawing and punching are most commonly used ; auxiliary processes, such as cutting shoulders, creasing, etc .; finishing processes, such as leveling, shaping. Due to the complex forces and large loads on the shaft of the hard tooth surface reducer, a forging method with high mechanical properties and quality is used to produce the blank. Whether it is manual free forging, free forging on hammers or free forging on hydraulic presses, the process is composed of some forging procedures. The so-called process refers to the part of the process that is continuously completed for a workpiece at the work site. 45 钢淬透性低，故应采用冷却速度大的 10% 盐水溶液。 Because 45 steel has low hardenability, a 10% saline solution with a large cooling rate should be used . 180 ℃左右时，因当淬火工件快冷到该温度区域，就应采取缓冷的方法。 After the gear shaft of the hard toothed surface reducer enters the water, it should be hardened, but not cold. If the workpiece is cold soaked in brine, it may crack the workpiece. This is because when the workpiece is cooled to about 180 ℃ , it is due to the If it is quickly cooled to this temperature region, a slow cooling method should be adopted.