Quasi-hyperbolic gear manufacturers detailed involute gear

Quasi hyperbolic gear manufacturers talk about what is involute?

Involute (involute) As the name suggests, the point above it is a curve that gradually leaves a fixed point (the center of the basic circle). Wrap the line around the cylinder, the end of the line is fixed on the pen, the pen grasps the line, gradually opens the cylinder, and lets it draw traces, then the traces become involute. It can be seen from the trajectory thus drawn that this is actually a motion trajectory on a straight line when the circle is rolling.

In addition, similar to the cycloid. The cycloid is the trajectory of motion when a point on a circle rolling on a straight line or a curve rolls together with the circle. Quasi-hyperbolic gear manufacturers believe that in practical applications, involute and cycloid are mainly used to design the shape of gears and racks. Gears and racks all work in a "rolling" manner, so these two curves are more suitable motion trajectories.

Involute cylindrical gear is one of the gears. When the tooth profile of the gear is composed of involute and conversion line, it is called involute gear. Involute is the more widely used gear curve because it has many advantages. There are many forms of tooth profile, of which involute tooth profile is more common. There are two types of processing methods commonly used in involute tooth profile: forming method and display method.

The purpose of measuring the number of teeth can be regarded as measuring the tooth thickness of the gear or measuring the displacement coefficient of the gear. In terms of gear parameters, we measure the common normal line during actual processing, but we don't pay much attention to the displacement coefficient. The displacement coefficient represents the offset distance of the tool, but it cannot be directly measured on the gear. The common normal line can be directly measured to calculate the occurrence of the displacement coefficient. What needs to be understood here is that the displacement coefficient also has an error range.

Quasi-hyperbolic gear manufacturers share what indicators we have checked in the process of designing gears. The undercut judgment refers to the phenomenon that in the process of processing the involute gear with the generality method, sometimes the tool tooth top cuts a part of the involute gear profile of the gear root. The shortcomings of cutting the pipeline may weaken the strength of the pipeline and even reduce the matching degree of the transmission, thus affecting the transmission quality. Although it has a negative impact on root cutting, there are now companies that use root cutting to offset the phenomenon of human bee interference. When there is a root cut, the value of the root bending strength calculated by the software is greater than the actual situation, which should be judged by the engineer himself. In particular, a root cut does not mean that it is absolutely not allowed to exist. Depends on the actual situation.

Tooth top thickness, chord sa represents the arc length of the top of the gear. The purpose of this value is to ensure the integrity of the gear tooth profile. How can I understand? As the displacement coefficient increases, the tooth tops of the gears become sharper and sharper. If you do not check this value, the engineer will ignore it and cannot machine the top of the gear. The quasi-hyperbolic gear manufacturer believes that if the tooth top circle is not processed to the required size, the calculated matching degree and sliding rate are incorrect. At the same time, if the tooth is at the top, the gear meshing impact will cause collapse. Once the particles enter the tooth surface, the gear wears very quickly. Therefore, the calculation of the tooth end thickness is very important. Usually Sa 0.25mn is required, and for surface hardened gears, Sa must be greater than 0.4 Mn. The size of the matching degree, code, and matching degree indicates the logarithm of the number of teeth participating in the meshing at the same time. = 1 shows that there is always only one pair of teeth meshing during gear transmission. There are two pairs of teeth meshing at the same time on the B2A1 and A2B1 (length 0.3Pb respectively) segments of the actual mesh line, which is called the double tooth meshing area. Only one pair of teeth is engaged on the A1A2 segment (length 0.7Pb) near node P. This is called the single tooth engagement area.