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Indexer sensing device

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Update time : 2019-05-23 15:47:23
The sensor of the cam indexer (also known as the type of signal cam), there is no fixed standard and structure, according to the needs of the actual application, the main role of the sensor is to combine with the sensor switch, or proximity switch , to the instruction system in the automation, send a stop signal to achieve precise control of the cam indexer.
The working principle of the cam indexer is that in the case of continuous rotation of the input shaft, each rotation is performed, and the output shaft runs a station. In the range of the angle of repose, the fixtures and the like supported by the divider perform machining operations, and the actual In production, depending on the time, simply relying on the static time of the indexer can not meet the processing time of the workpiece. In addition, during the operation of the automation system, the adjustment of production speed, and the handling of intermediate maintenance abnormalities, etc., will be the whole system. To do the control of the stop, then this task is completed by the sensing system of the cam indexer, and the sensor in the sensing system is a more important part.
The structure of the sensor is required to have two aspects. First, the angle of the sensor must be the same as the driving angle of the input shaft of the indexer. For example, if the driving angle of the input shaft is 270 degrees, then the driving angle of the sensor is also The driving angle of the input shaft is the same. On the other hand, during the installation and use, the rotation angle of the induction piece must be the same as the rotation angle of the input shaft, so that the signal of the input shaft of the indexer can be accurately transmitted to the control system.
The structure of the sensing piece is exemplified by the commonly used U-shaped photoelectric switch and the proximity switch. The input shaft of the standard cam indexer is a bidirectional coaxial structure, and the input shaft on one side is used to connect the drive source motor motor, etc. One side is used to install the induction system, the annular sensor piece is installed with the input shaft, and the angle or vacancy angle of the sensor blade is consistent with the angle of the indexer; the proximity switch structure is the same as the U-shaped switch, but the difference between the two principles One is photoelectrically sensitive and the other is magnetic contact.
There are also some designs that do not need to be mounted directly on the input shaft, mounted on the base or other mechanism, but, in the end, must be synchronized with the rotation of the indexer input shaft. There are other design methods for the sensor chip. For example, using a 360-degree blade, two notches are designed at the driving angle and the angle of repose. Although the structure and style are similar and the same, the effect is the same, and can be selecte according to the actual design and use.