Tuesday, August 28, 2012

Refining the Ceramic Grinding Process Through Three Main Points of Emphasis

Even though advanced ceramics have received increased attention in the past 15 years, their usage has been growing gradually for over 50 years. Ceramics have become a preferred choice across a variety of industries as a result of the number of advantages they supply over conventional metals. Among the most typical methods of machining hard ceramics is grinding. Ideal tool selection, control over thermal conditions, and selection of cutting fluid are three areas of concentration for the optimization of the ceramic grinding process.

Controlling Thermal Conditions

Throughout the grinding process, some degree of thermal contraction and expansion is to be expected. The problem arises when the temperature swing becomes extreme, especially if they surpass the highest permissible temperature of the specific ceramic material. There are two reasons optimum thermal conditions are vital. First, abnormal shifts in the ceramic grinding process usually results in shaping errors. In most cases, rounded edges will be the most obvious sort of error. Subsequently, considerable thermal changes result in splits in the ceramic itself. Any structural flaw leads to a serious decrease in the end-product’s durability and functionality.

Ideal Tool Selection

The grinding process is tremendously dependent on tools that incorporate abrasive particles which are a key component in the creation of the necessary material removal. With the selection of the best tools, the level of cutting fluid required can be greatly reduced and still maintain clear pores within the grinding wheel. Superior tools additionally are able to run more efficiently at elevated cutting speeds and can aid in the provision of a more consistent surface quality in the finished product. In most instances, diamond abrasives are the very best possible solution within ceramic grinding applications.

Selecting Cutting Fluids

Cutting fluids are used for several reasons in the ceramic grinding process. Depending on the project, cutting fluid may not be necessary. In a good number of situations, the application of cutting fluid is chosen because it helps expel chips and particles from the cutting zone. To choose the optimal cutting fluid, a few factors need to be considered. The first factor is the amount of lubrication required. The lubrication supplied by cutting fluids helps with creating the work-piece shape, presenting a cleaner surface finish, and helping preserve surface integrity. Cutting fluids also work to keep the equipment cooler. It accomplishes this by reducing the friction generated during the grinding process and ensures the tool does not exceed its critical temperature. If a tool exceeds its critical temperature, it will start to soften and will wear a lot quicker.

Although the optimization of the ceramics grinding process calls a multitude of parameters into consideration, there are three critical areas that should be emphasized. Mistakes within any one of these specific areas will cut short the life of the tools and considerably reduce the overall quality of the end result. Just like any other machining strategy, control over thermal conditions is vital to the process. It becomes much easier to find the proper tool for the task once an effective strategy has been chosen. Generally, it is easier to discern which cutting fluid will be best after the equipment and grinding technique have been chosen.