1, affect the surface quality of the product:
The burr affects the finish of the surface of the product. In cases where the surface quality requirements are relatively high, the parts are not qualified. For example, some gear pump side plates can not be used because the parts have not been removed or removed.
2, affect the product's assembly performance:
For some structural parts with higher assembly requirements, the presence of burrs directly affects the assembly requirements due to interference and stuck parts, such as motor Bushing, guide sleeve of car shock absorber, bottom seat, piston, etc..
3, affect the product's heat treatment performance:
When the parts with burrs are heat treated, they are prone to stress concentration and cracks, resulting in reduced fatigue strength of the parts. This can not be ignored for parts that are subject to high load and high speed movement.
4, affect the use of product performance:
In the process of mechanical operation, under the action of friction, the burrs are easy to fall off, which aggravates wear and tear, causing early failure of the parts. In the hydraulic system, the falling burrs enter the loop of the hydraulic system with hydraulic oil, affecting the normal operation of the hydraulic system, and crawling and shaking occur.
5, affect the positioning performance of the product:
Powder metallurgy mostly uses longitudinal suppression, and the side forming ability of the product is poor. For laterally porous parts, mechanical processing is often required. The existence of burrs will inevitably lead to positioning errors, which will affect the machining accuracy of holes. For parts with higher accuracy requirements, burrs must be removed before machining. In addition, burrs also affect the detection accuracy of parts.
The above is about the impact of burrs on the quality of powder metallurgy products. Today, there are many ways to remove burrs. The selection should be combined with the actual production of the factory, taking into account the material, burr size and parts of the parts. It is also necessary to consider the principle and economy of the method of removing burrs.