Remove material incrementally

Although manual surface grinding tools are available, a key feature of the surface grinding service is the precise, repetitive removal of small increments of material by the machine. Here, the less removed, the better the surface finish, the better the dimensional accuracy.

It is not recommended to remove a large amount of material thickness in one pass as this can produce poor surface finish. In addition, applying this type of stress to metals and machines can result in poor positioning accuracy and may cause the workpiece to break.

Instead, it is far better to make many repeated passes, removing slightly more material each time.

This makes watching an automatic surface grinder like watching a perfectly choreographed, rapidly repetitive left-right movement, in which each interval moves imperceptibly a little toward the metal, removing a very small amount of material with each pass. The machine performs its tasks without generating any vibrations and noises that accompany the removal of metal by rotation.

The exception to this incremental material removal is creep feed grinding - a precision surface grinding method originally designed to remove large amounts of material at once.

However, it was soon discovered that the rapid reciprocating motion commonly used in surface grinding was not suitable. Therefore, the design of creep feed grinder has a very slow feed rate.

Interestingly, in metal cutting, we still have some old creep feed automatic grinders that are now out of production. Thus, we were able to use creep feed techniques on a smaller scale to improve surface finish, even though material removal rates were not the primary concern.

Please contact us at zhang@pride-cnc.com