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15 October, 2009

Advantage of using a linear vibrator for feeding to Centreless grinding machines

Vibratory bowl feeders are the best feeding devices for automating the operation of centreless grinding machines, mainly the through feed types of centreless grinding machines. The vibratory bowl feeder is used for orienting the component in the correct manner / orientation, which usually is axial orientation.

After the component is oriented in the correct manner, it has to be further transported onto the work rest of the grinding machine. There are three possibilities for making this transfer-

  1. Gravity Chute – In case of the gravity chute, the back pressure of the components and the inclination of the chute result in movement of the components from the bowl to the work rest of the centreless grinding machine. The advantage of using a gravity chute is that it is cheaper to make as well as to maintain. But the disadvantage of the same is that due to the emphasis on back pressure and inclination, a few (7 to 8) components are always required in the chute for generating continous and consistent pressure for the grinding operation. This always may not be possible and can lead to uneven pressure and quality of the ground components suffer due to this.
  2. Small Parts Conveyor Feeder – This is a conveyor kept ahead of the bowl feeder for conveying the components onto the work rest of the grinding machine. It can generate consistent and continous pressure on the components and works very well with excellent results. The disadvantage is the cost factor, which is high and additionally, for better results, a variable drive is required, which further adds to the cost of the conveyor. Add to this the usual maintenance costs associated with the geared motors, belts etc. and this does not become a cost effective solution.
  3. Linear Track – A Linear track is a chute mounted on a linear vibrator which can do the work of conveying the components from the bowl to the grinding machine work rest. The linear track can generate the same pressure on the components and this can result in a very good finish quality of the components. Further no back pressure is required and hence even a single component can flow through at a very easy pace.

Therefore, the best way for feeding of components to a centreless grinding machine is to provide for a linear track ahead of the bowl feeder. This is the best and cost effective solution for automating of a through feed centreless grinding machine.

Advantage-of-using-a-linear-vibrator-for-feeding-to-Centreless-grinding-machines

Advantage-of-using-a-linear-vibrator-for-feeding-to-Centreless-grinding-machines

Monish Shet

Monish Shete is CEO of Elscint Automation, a 30 year old firm manufacturing vibratory bowl feeders and similar small part handing products. He personally has more than 25 years experience with last 15 years being with Elscint. This blog will help customers and laymen understand the intricacies of vibratory bowl feeders. One can find information about the finer aspects of vibratory bowl feeders which cannot be found anywhere else. Case studies and information about various innovative ways of feeding and orienting of different parts are given in this blog.


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