Factors Influencing Friction In Steel Sheet Forming

The strip drawing test of sheet metal was used in the simulation of the steel sheet steel tool friction contact conditions during a drawing operation. In this blog post dr. The influence of tool steel microstructure on friction in sheet metal forming kirkhorn lanny lu.

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Factors Affecting Friction Lesson Lesson Friction Surface

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Various lubricants are used to reduce the friction during the metal forming.

Factors influencing friction in steel sheet forming.

Abstract the frictional behavior of a number of conventional tool materials used in the sheet forming industry has been studied by a recently developed tribotester based on flat die strip. The plane strain bending process is simulated in abaqus standard. The friction conditions are dependent on the tribology system i e. Andersson mats lu and ståhl jan eric lu in wear 302 1 2.

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. If friction exists more than necessary it has a negative impact on characteristics of a product. In sheet metal forming friction has a major role in knowing the properties of metals. Sample orientation lubricant velocity of sample displacement plastic strain and contact pressure.

The coefficient of friction in stribeck curve depends on sliding velocity and contact pressure. Any type of friction will increase force hence stresses in the material. There is a need to study the various factors affecting the friction. As the factors produce a dispersion effect on friction the following variables were chosen.

Friction and lubrication are important factors when trying to accurately simulate advanced high strength steel ahss metal forming processes. 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. The applied pressure load surface roughness both of sheet metal and tool and process conditions static or dynamic loads. The influence of forming speed over pressing and holding time on springback behaviour of sheets was studied numerically.

Die and blankholder surfaces for deep drawing sheet metal must be as smooth as possible they should be ground and lapped to mitigate friction.

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