At the time of production, synchronous cog belt on pitch error reason mainly in what place?

Synchronous cog belt mainly by spiral winding wire, cloth belt body and tooth bread layer three parts. When the production to the condition of the error as follows:

1, the polygon effect in synchronous belt pitch error occurs. At the time of production, the skeleton line around in metal mould of cylindrical. Skeleton line and mould addendum touch position present circular arc form, the tooth part is straight. This let the skeleton line in the mold shape generated on the multilateral, this kind of situation, is often called & other Polygon effect & other; 。 So. In fact, the skeleton of the length of the rope shorter than predicted. Relatively make synchronous tooth pitch line decreases the length of the synchronous belt, with tooth pitch is relatively less, and the synchronous belt wheel tooth pitch is not the same.

2, since the skeleton line on the mould is not the same as the firmness of pitch error. Skeleton line on chess sets if wrapped too tight, the polygon effects become apparent, to take the pitch of relatively less: wrapped too loose, can let a skeleton line bends in the substrate material, when the synchronous cog belt when subjected to tension straightening skeleton line and cause tooth pitch. Skeleton, therefore, the string is too tight or too loose will make error of the tooth appears on the pitch.

3, a distance h incorrect numerical control and the pitch error. Skeleton line, the distance between the centerline to the top of synchronous belt wheel at the time of production must be on the diameter of the skeleton line and its position in the take regulate, to ensure accurate section of zenith distance, otherwise, this will trigger a synchronous cog belt pitch line length and the change of pitch.

4, skeleton when rope in-service mold shrinkage deformation occurring in the course of pitch error of synchronous cog belt from the mould, with temperature drop, the skeleton of the cord will be cooling and contraction, thus bringing a change in the pitch line length and pitch. Main causes of pitch error occurs skeleton line should possess great strength, and resistance to repeated bending without elongation, pitch so that it can be maintained constant.