Grinding Metal Troubleshooting-part Two

In our previous article we discussed some of the problems that may arise in the metal grinding process, next we will see what other problems can there be?

1. Cutting wheel chatter

Chatter, or wheel vibration, is a common problem in grinding. This problem can be divided into two categories: forced flutter and non-forced flutter. Forced chatter is usually caused by an unbalanced grinding wheel, damaged grinding machine bearings, uneven wheel wear, improperly installed grinding wheel, or improper clamping of the substrate, which can cause vibration. Unforced chatter increases over time. Most of the time, this is caused by a dull wheel or an invalid or too shallow grinding angle. To resolve wheel chatter, clean or replace adapter nuts that may be dirty or worn. Check to make sure the wheel fits flush and flush with the adapter nuts and there is no uneven clearance for the wheel to sit on the lower adapter nut. Before starting work, you can check the bearings by running the grinder freely with the wheel attached for a short period of time. In many cases, if a bearing fails, the operator will hear a knocking sound.

2. Wheel load

When the abrasive product becomes clogged or sticky due to material filling the spaces between the abrasive grains, this is known as loading. It's easy to see when this happens to a grinding wheel. The operator can also feel when the grinding wheel is loaded because grinding becomes ineffective. Loading occurs more frequently when grinding softer non-ferrous alloys or alloys with lower melting temperatures. If you're not using a wheel made for machining aluminum, the loading time won't be as long. To avoid wheel stress when grinding softer metals, look for products designed for grinding non-ferrous metals and alloys.

3. The wheels do not grind

There are many factors that can prevent grinding wheels from grinding. Some common causes are using a product binder that is too hard for the substrate, not using enough pressure when grinding, or using an underpowered tool. Always use a higher powered tool to ensure maximum performance from your wheels. Also, choose an extension cord that can provide enough power for the grinder.