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Longer unattended production is just one of the benefits of the CPX Whitestick Assembly

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When grinding, wheels can become loaded with swarf. The purpose of sticking is to expose grit and remove bond to allow coolant and swarf to clearly pass between the Diamond or CBN grits embedded in the grinding wheel. Sticking of the wheel is done regularly to return it back to its proper condition.
The material and composition of the stick is dependent on the application, but in many cases white aluminum oxide or silicon carbide materials are used. The sticking process is particularly important for the resin bond finishing wheel grinding blanks using the pinch/peel method on the CPX Linear.
With pinch/peel grinding the roughing wheels remove most of the material leaving a small amount of stock for the finishing wheel to grind the blank down to the final size. Therefore, the sticking of the finishing wheel is critical to the process mainly when large batch quantities of blanks are being ground. It is important to note the roughing wheel on the CPX Linear is metal bond with a very hard grade. The roughing wheel design and composition means it does not have to be sticked frequently.

The solution to the problem of sticking the finishing wheel on the CPX is the Whitestick assembly. The CPX Whitestick assembly is not permanently mounted and is only fitted when required on an infrequent basis. The complete package consists of a mounting arm, an aluminum oxide stick, coolant nozzle assembly and application software. The arm which holds the stick is easily mounted to the X saddle using a dovetail block. When the assembly is mounted, the stick is first manually taught to the finishing wheel. Sticking is then performed by moving the V-axis finishing spindle and X axis to the programmed position to stick the wheel. ​
Sticking of the finishing wheel offers many benefits including:
  • Reduces glazing of the wheel which prevents burning  
  • Blank quality and size is maintained
  • Improves cycle times and life expectancy of the wheels
  • Ensures freer cutting wheels with lower spindle loads
  • Longer unattended production
The Arm on the Whitestick assembly accepts standard white stick sizes – 25mm (1”) x 15mm (5/8”) x 100mm (4”) long. A Whitestick assembly retrofit kit is also available for CPX Linear machines already installed at the customer’s site. The set up time is less than 10 minutes, ensuring minimum downtime. The Whitestick software has several operations for efficient sticking of the wheel, including a sticking distance to make sure the wheel passes over the entire face of the Whitestick. Infeed per pass and feedrates for determining the axis sticking speed are also available. The user can also set the number of passes the wheel will traverse across the Whitestick.
The quick mounting and semi-automatic Whitesticking process on the CPX Linear also offers safety benefits and cost savings. By using the CPX Whitestick assembly, it means the correct force is applied and the operator does not have to manually stick the wheel by hand. The stick wears evenly; wear is reduced, and a constant amount of bond is removed from the wheel. The process provides consistency when sticking so the wheel performs as expected.

24 November 2020