Causes of Burrs on Powder Metallurgical Parts

Causes of Burrs on Powder Metallurgical Parts

What is the reason for the burr of powder metallurgy parts? The following is the share of zhongwei precision editor:

Die clearance: there must be a matching clearance between the female die and the die and the relative movement between the die and the mandrel., When metal powder or finished sintered blank is formed under the pressure in the mold, flow or plastic deformation will occur., The filling effect of molded parts at the mold gap is the root cause of burr.

Equipment accuracy: the equipment accuracy is insufficient, which leads to the deterioration of the working conditions of the mold and promotes the generation of burrs. In addition, if the loading height exceeds the travel range of the equipment, and the pressing pressure is too large, resulting in insufficient tonnage of the equipment, which leads to unstable operation of the equipment, burrs will also be generated, which are mostly randomly distributed on the surface of the parts.

Die damage: due to the complex shape of the die and the high manufacturing cost, it is often found that the flash and burr will occur when the die is still in service without affecting the final quality of the product (that is, the defects of the powder metallurgy blank can be eliminated in the subsequent process, without affecting the delivery quality of the product). The shape of the burr is relatively regular and exists at the defect of the die.

The above is about the causes of burrs on powder metallurgy parts. I hope this article can help you. If you need more information, please come to zhongwei for precise understanding. We will have professionals to answer for you.

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