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Indexer cam graph-indexing drives

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Update time : 2019-07-21 15:33:55
The cam motion curve of the indexer is a smooth curved surface connected by a myriad of starting points and end points. When designing the cam indexing, the use of the sinusoidal curve is based on the condition of smooth motion. From the selection of materials, from vibration, noise and rigidity. Aspects, as well as the system's load and speed of motion, are designed with the best curves for speed, acceleration, and runout performance. The acceleration of the cam has an important influence on the accuracy of the division and the life of the cam and the cam roller.
indexing drives
The displacement curve mentioned here shows the relationship between the input axis (displacement time and angle, etc.) and the output shaft displacement. As shown in the figure, the abscissa in the figure represents the displacement, and the ordinate represents the The displacement of the indexer output shaft of the S number is S.
When selecting the curve of the cam, the relevant values ​​to be considered are the maximum running speed, the maximum acceleration, and the maximum runout coefficient. In the case of a relatively large running speed, a large force is received in the sudden stop, so To choose a smaller fluctuation curve. If the load is heavy, choose a small curve. The maximum running speed has a great relationship with the size of the cam. In the case of a small running curve, the size of the cam is correspondingly smaller. The value of the maximum speed is generally expressed in Vm, and this value cannot be greater than one.
If the maximum acceleration of the cam is large, the allowable load becomes small. In the case of high speed operation, the curve with less acceleration is selected, and the acceleration is represented by Va. In this case, the value of Am is greater than 4 . The maximum jitter value is Jm, and this value is also small to ensure smooth and stable motion.