From Ceramic Technology and Processing

1.0 THE GRINDING PROCESS

The scope of this chapter is limited. Grinding is by itself a skilled or semiskilled craft. The intent is not to teach how to grind a ceramic part. In-stead, the intent is to describe the process and offer some insight about how this affects the ceramic.

Ceramics are usually ground with bonded-diamond abrasives. There are two types of bonds in common use, metal and resinoid. Metal is rougher and lasts longer. Resinoid is gentler and wears out faster. Always use resinoid for finish grinding of fine-grained, dense ceramics as there is less surface damage to the part.

Tool Type and Grit Size

There are two types of metal-bonded, diamond-cutting tools. The sintered-powder, metallurgical type with included diamond grit and the surface bonded type with electroplated Ni on sedimented diamond grit. The latter is common in metallographic grinding and polishing. The powder-metal, bonded type is more common in the machine shop and is used for percision shaping of a part. Resin-bonded and diamond-bonded cutting tools also come in these two forms for similar uses. Abrasive points protrude from the surface of the grinding wheel, as schematically shown in Figure 9.1.


Figure 9.1: The Grinding Process. Abrasives damage the ceramic surface to an appreciable depth. Rubbing of the wheel on the surface can cause heating.

Grinding is a scratching process, leaving jagged scratch roots and sub surface cracks. In Figure 9.1, not all the abrasive grains stick out from the wheel surface the same distance, so the longest...

Copyright Noyes Publications 2002 under license agreement with Books24x7

Products & Services
CNC Machining Services
CNC machining services use fast, repeatable, and programmable machines which can function while unattended in order to manufacture parts quickly and efficiently.
Gear Manufacturing Services
Gear manufacturing services design and fabricate gears to customer specifications.
Web Coating Services
Web coating services apply a layer of resin or other liquid coating to the surface of a continuous sheet of material.
Tube Fabrication Services
Tube fabrication services perform end-services such as notching, slotting, and piercing. They do not manufacture pipes or tubes.

Topics of Interest

1.0 INTRODUCTION Crafting a ceramic is similar to building a pyramid. It starts with a base, which, in this case, is the starting grain or powders. Everything depends on the base, and when it is...

Precision Swiss-machined components are produced with tolerances from 0.002 mm, lengths to 600 mm, and diameters from 0.1 to 150 mm. Equipment includes multiaxis lathes, precision grinding, and...

The Triangle Machine Products Company is a state-of-the-art facility based in Cleveland, Ohio, specializing in machining precision metal components. Part of Freeway Corporation, Triangle Machine...

THE MACHINING PROCESS All machining, whether heavy single-point planing or turning, form-tool turning or milling, grinding, honing, or lapping, involves essentially the same process at the point...

Inspection Process Enhances Machining Services With the aid of CNC equipment, a company provides machining services to OEMs with capabilities complemented by 3-D CAD software. Milling, turning,...