Influence of Burr Generation of Powder Metallurgical Parts on Product Quality

Influence of Burr Generation of Powder Metallurgical Parts on Product Quality

Powder metallurgy gear parts have good dimensional consistency, stability and high accuracy. So what is the impact of the burr of powder metallurgy parts on product quality? The following is the share of zhongwei precision editor:

Influence of burr on product quality

Due to the processing characteristics of powder metallurgy products, burr cannot be avoided. The burr and flash shall be strictly controlled within a certain range, and the excessive ones must be removed, otherwise the product quality and performance will be adversely affected, mainly reflected in the following five aspects.

1. The positioning performance of the product is affected: powder metallurgy mostly adopts longitudinal pressing, and the side forming ability of the product is poor. For parts with holes on the side, machining is often required. The existence of burr will inevitably lead to positioning error, thus affecting the machining accuracy of the hole. For parts with high accuracy requirements, burr must be removed before machining. In addition, burr also affects the detection accuracy of parts.

2. Affect the assembly performance of the product: For some structural parts with high assembly requirements, the existence of burr is easy to cause interference and jamming of mating parts, such as motor bushing, guide sleeve of automobile shock absorber, bottom valve seat, piston, etc. The existence of burr directly affects the assembly requirements.

3. Affect the service performance of the product: during the mechanical operation, under the action of friction, the burr is easy to fall off, which aggravates the wear, and causes the early failure of the parts. In the hydraulic system, the burrs that fall off enter the circuit of the hydraulic system with the hydraulic oil, affecting the normal operation of the hydraulic system, causing crawling and shaking.

4. Influence on the surface quality of the product: burr affects the surface finish of the product, which leads to the disqualification of the parts in the case of high requirements on the surface quality. For example, some gear pump side plates cannot be used because the parts are not removed or the dirty burr is removed.

To sum up, the burr of powder metallurgy parts has an impact on product quality. I hope this article can help you.

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