The inner hole of high speed steel hob will be deformed after carburizing heat treatment. The unilateral deformation will range from 0.1 mm to 0.25 mm, and the surface hardness can reach above HRC60 degrees.

Multi-stroke honing process and single-stroke honing process. Multi-stroke honing process means that the honing head can make several strokes during the processing of the workpiece. There are mainly horizontal and vertical honing machines to choose from.

Vitrified CBN grinding wheel has the advantages of good thermal stability, good wear resistance, not easy and elements of iron group produces chemical reaction, suitable for processing hard and toughness of steel, the auto industry is the main vitrified CBN grinding wheel’s application domain, especially as the key parts of engine camshaft and crankshaft processing aspect, the camshaft and crankshaft machining quality directly affects the dynamic performance of the engine.

Ordinary cylindrical grinding uses the center holes at both ends of the workpiece to support the workpiece between the headstock and tailstock center of the grinder. During grinding, the workpiece rotates under the drive of the main shaft, and the grinding wheel makes lateral feed.

Two enabling technologies — superabrasive wheels and high precision servo control — come together to provide a contour grinding process that resembles an OD turning operation. For many medium volume OD grinding applications, this method may be a means to consolidate several manufacturing steps into a single setup.

At present, sintering method is the main method in China. Compared with electroplating method, it has a longer life and more stable performance. On the contrary, electroplating method is more widely used than sintering method in foreign countries. The following figure shows the manufacturing methods and characteristics of sintered diamond rollers and electroplated diamond rollers.

Solution

1.  Adjust front and rear guides

2.  Replace coolant

3.  Round the edge of the grinding wheel so that the 20mm at the exit of the part will not be used for grinding

4.  Advance the center height of the parts properly

5.  Dressing the grinding wheel

6.  Properly reduce the amount of grinding and slow down the rate of modification

The rotation direction of the roller is divided into two types: forward dressing and reverse dressing. Most of them use the forward dressing method (the direction of the linear velocity of the contact point of the grinding wheel is the same); the reverse dressing will be affects the life of the diamond roller.

Flame spraying is one of the oldest forms of thermal spray. Typically using oxygen and acetylene, these thermal spray systems melt wire or powder in the combustion stream and apply it to the part. These coatings are great for restoration of old parts. Flame spraying systems can spray I.D. and O.D. components and can be readily brought to a customer site for repairs if needed.

The surface roughness Ra< 0.01µm and the flatness plane is< 3µm/1000mm after the workpiece grinding.