Factors Influencing Friction In Steel Sheet Forming

If friction exists more than necessary it has a negative impact on characteristics of a product.

Factors influencing friction in steel sheet forming.

Sample orientation lubricant velocity of sample displacement plastic strain and contact pressure. In sheet metal forming friction has a major role in knowing the properties of metals. Any type of friction will increase force hence stresses in the material. The plane strain bending process is simulated in abaqus standard.

The applied pressure load surface roughness both of sheet metal and tool and process conditions static or dynamic loads. The coefficient of friction in stribeck curve depends on sliding velocity and contact pressure. Various lubricants are used to reduce the friction during the metal forming. Friction and lubrication are important factors when trying to accurately simulate advanced high strength steel ahss metal forming processes.

There is a need to study the various factors affecting the friction. The friction conditions are dependent on the tribology system i e. The influence of tool steel microstructure on friction in sheet metal forming kirkhorn lanny lu. In this blog post dr.

Die and blankholder surfaces for deep drawing sheet metal must be as smooth as possible they should be ground and lapped to mitigate friction. Johan hol development manager from triboform engineering describes frictional influences that are unique to ahss forming and how the accuracy of predicting ahss automotive parts forming may be increased by using an alternative friction model. The results further showed that the surface topography and sample orientation in the rolling direction of the sheet are significant factors that influence the friction coefficient. As the factors produce a dispersion effect on friction the following variables were chosen.

The influence of forming speed over pressing and holding time on springback behaviour of sheets was studied numerically.