The burr problem in the production of slitting line always be a problem of many people. Do you really know about why there occurs to the burr problem? Today, we are going to explore the problem in depth. If you are interested about that, just read the following article. I believe you may learn a lot about it.

1. Clearance of slitting knives

The harder the material, the less cutting required before the material fractures. The softer the material, the deeper the cut before the metal breaks. So harder materials require more horizontal clearance, while softer materials require significantly less.

Consequently, the correct horizontal clearance would be approximately 5 percent to 7 percent of the material’s thickness. For mild steel, the typical knife penetration is 25 percent to 30 percent of the material’s thickness and the horizontal clearances would be set at approximately 10 percent. For material such as stainless steel and many of the higher strength low alloy steels, it may require as little as 5 percent to 10 percent penetration, with up to a 90 percent to 95 percent fracture. If this were the case, the horizontal clearance is frequently set at 20 percent or more of the material thickness.

2. Slitting knives

The slitting knives itself is also a major consideration. We have searched in vain for the perfect tool steel that fits all cutting applications. However, no one yet has found it. There is a trade-off between wear resistance and shock resistance. Wear resistant tooling lasts the longest, but is not very tough. Their use is typically limited to light gage applications. Shock resistant tooling is required for higher strength, thicker material but lacks long life. Consequently, it is important that the slitting machine builder and end user work in concert with the slitting knives supplier to find the best balance for a particular application with the least amount of sacrifice.

Bangzhou Machinery can not only offer you the slitting machine,but also the slitting knives. The products of our company all have the high quality. We gained the great reputations in the field of cold rolled steel and there are many new machines exported to Southeast Asia , Europe, Latin America and Africa. Our company has tremendous strength on technical and professional production capability. Don’t hesitate to contact with us!