How to Check Worm Quality in Precision Parts Processing
The tooth thickness caliper is usually used to measure the normal indexing chord tooth thickness of worm in precision parts processing, or the pitch diameter three needle measurement method can be used.
The method for measuring the chord tooth thickness of the worm indexing circle is as follows: the vertical ruler is used to calibrate the normal chord tooth height hnal of the indexing circle, and the level ruler is used to measure the normal chord tooth thickness snl of the indexing circle. The calculation of hani and snl is shown in the table of methods for measuring worm pitch diameter.
Method of measuring worm pitch diameter. During measurement, put three measuring rods of equal diameter into the corresponding groove of the worm, and measure the distance of the measuring rod with a micrometer of the common line method to check the pitch diameter of the worm. The measuring rod diameter d0 and the measuring distance M are generally determined by the technical data of the worm pattern. The sensitivity of this method is 3~4 times higher than that of tooth thickness caliper.
Analysis of Worm Milling Quality The accuracy of the worm milled by the disk milling cutter on the milling machine is relatively low. The main reason is that the tooth profile of the milling cutter deviates from the tooth profile of the worm, and there is interference in the processing of precision parts, which will also cause the error of the tooth profile, which will lead to milling quality problems and causes.
