What are the effects of burrs on the quality of powder metallurgy products?

What are the effects of burrs on the quality of powder metallurgy products?

The characteristics of powder metallurgy make it widely used in various industries, but the burr phenomenon cannot be avoided in the production and processing process. We can only control this situation within a certain range, otherwise the excessive burr phenomenon will have more impact on product quality and performance. So, what are the effects of burrs on the quality of powder metallurgy products? Qinghuangdao Zhongwei Precision Powder Metallurgy Gear Technicians:

1. Influence the appearance quality of the product:

Burrs affect the surface finish of the product. In the case of high requirements for surface quality, the parts are unqualified. For example, some gear pump side plates cannot be used because the parts have not been removed or the unclean burrs have been removed.

Powder metallurgy gear

2. Affect the assembly performance of the product:

For some structural parts with high assembly requirements, the existence of burrs 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 burrs directly affects the assembly requirements.

3. Affect the heat treatment performance of the product:

When the parts with burrs are heat treated, they are easy to gather stress and produce cracks, which will reduce the fatigue strength of the parts. This cannot be ignored for parts subject to high load and high speed movement.

4. Affecting the performance of the product:

In the process of mechanical operation, under the effect of friction, burrs are easy to fall off, which aggravates wear and causes early failure of parts. In the hydraulic system, the dropped burrs enter the circuit of the hydraulic system together with the hydraulic oil, which affects the normal operation of the hydraulic system and causes creeping and chattering.

5. The positioning performance of the product is affected:

For powder metallurgy, the longitudinal limit is often used, and the side face of the product has poor forming ability. Parts with holes on the side face often require machining. The existence of burr must lead to positioning error, and then affect the machining accuracy of the hole. For parts with high accuracy requirements, burrs must be removed before machining. In addition, burrs also affect the detection accuracy of parts.

The above is about the influence of burrs on the quality of powder metallurgy products. Zhongwei precision powder metallurgy gear processing manufacturers remind us that there are many deburring methods, and the selection should be combined with the actual production of the factory. Both the raw materials, the size and location of the burrs of the parts, and the principle and economy of the deburring methods should be considered.