As an important part of transmitting power, gear shaft is widely used in transmission or reducer parts of heavy industrial equipment such as agricultural machinery, transportation and mining machinery. Its service environment is extremely harsh. While transmitting power, it also has to bear high-strength alternating load and impact load....
The reason of gear forging folding is that the metal flow is not smooth during final forging, so reducing the trend of gear forging folding should be realized by improving the metal flow in the final forging process. The reasons why the metal flowing out of the skin meets...
1. Casting technical requirements The structure of gear parts of an oil pump is shown in Fig. 1 and Fig. 2 (shaft and disc). Alloy structural steel 12cr2ni4a is adopted. This material is an excellent carburized steel with good hardenability. After carburizing, quenching and low-temperature tempering, it not only...
Forging process flow of two shaft gear forgings: blanking with band saw（ φ 85mm round steel) → heating in medium frequency induction furnace → upsetting and forming on program-controlled hammer. The insert die is shown in Figure 1. There are three factors that can lead to gear forging folding...
Folding is a common defect in gear forging production, which is formed by the local convergence of oxidized metal surfaces at high temperature and pressed into the forging. On the machined surface, it is generally difficult to distinguish between gear forging folding and cracks in appearance, but the tail...
The different choice of sign in the tooth profile section curve equation will affect the convexity and convexity of tooth surface; According to the center position and arc radius of the profile curve of pinion and ring gear ρ 1、 ρ Three kinds of contact surfaces can be constructed:...
Taking the points on the contact lines R1 and R2 as the coordinate origin and the base vectors of fixture coordinate systems s and SP as the X, y and Z axes, the tooth profile coordinate systems os-xsecyseczsec and os-xsec2ysec2zsec2 (abbreviated as δ 1、 δ 2)。 At the meshing...
Establish the space right-handed coordinate system, as shown in the figure. The installation center distance of linear gear pair is e, so and SP are fixture coordinate system. S1 and S2 are respectively the coordinate systems which are fixedly connected with the pinion and the ring gear. At the...
Due to the complex tooth profile of traditional industrial gears, it is very difficult to miniaturize and micro nano application. In 2007, Chen Yangzhi put forward the meshing theory of spatial curve, through which the “simple entity” constructed by spatial curve instead of the traditional “complex entity” constructed by...
It is assumed that the centre of both gears is rigidly supported.In the meshing state of tooth surface, the relationship between pressure angle of meshing point of gear 1 and speed is shown in the figure. In the figure, the origin of coordinate system o1xy is in the theoretical...