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Evaluation of Different Concepts for Pressed and Sintered Connecting Rods
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
2019 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Connecting rod are found in most combustion engines and transmits thrust from the piston to the crankshaft. The connecting rod needs to withstand forces from the piston and inertia forces which results in axial tension, compression stresses and bending. Today the most common manufacturing techniques in automotive industry are drop-forging, die-casting and the Powder Metallurgy technique used is powder-forging.

In this Master Thesis different connecting rod designs for a single press PM manufacturing process were created and evaluated as a part of Höganäs AB's Total Powder Metal Car project, TPMC. This paper will serve as a basis for future connecting rod projects at Höganäs AB when choosing a suitable connecting rod design.

The main objective of this Master Thesis is to evaluate different designs in regards to the following:

  • Buckling strength
  • Fatigue life
  • Manufacturing rating

The study shows that there is evidence that a single pressed connecting rod is possible. No absolute answer of which design is the best is given in this paper since in depends on different parameters and application. For each parameter examined there are results presented and arguments for and against each design which can aid designers in future work.

Suggestions of improvement on both the method and on the designs are presented in respect to the results. The improvements may potentially increase the fatigue life, buckling strength and improve manufacturability.

Place, publisher, year, edition, pages
2019. , p. 64
Keywords [en]
Connecting Rod, Con Rod, Fatigue, Buckling, Manufacturing, Höganäs AB, CAD, FEM, FEA
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-74410OAI: oai:DiVA.org:ltu-74410DiVA, id: diva2:1323390
External cooperation
Höganäs AB
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Examiners
Available from: 2019-06-26 Created: 2019-06-12 Last updated: 2019-06-26Bibliographically approved

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