Production improvement of an agriculture engine part under hot closed dies forging using finite volume method

Name: S. Suranuntchai

Organization : King Mongkut’s University of Technology North Bangkok. Faculty of Engineering. Department of Tool and Materials Engineering,

Name: P. Kritboonyarit

Organization : National Science and Technology Development Agency. National Metal and Materials Technology Center

keyword: Production Improvement

LCSH: Finite Volume Method

; Agriculture Engine Part

; Hot Closed Dies Forging

; MSC

; SuperForge

Abstract: When bulk materials are deformed by forging processes, they will flow in perpendicular to the motion of tools direction and their shapes are also followed by the geometry of designed dies. The limitation of forging processes depends on the tools life and the quality of finished products such as dies fracture, surface tearing and dimensional accuracy on workpieces. In the current research work, some critical problems found in industry where fabricates agriculture engine parts by hot closed-dies forging process have been studied. The main objective of this project focuses on the productivity improvement of such product. Under the manufacturing circumstance of 1250 units by average observed, wrinkles occurred on the workpiece surface near the shoulder area of deformed part as well as cracks were taken place on and insight forging dies. The closed-dies forging were made of SKD61 steel, which was hardened to the constant level of hardness about 56 HRC. The material for workpiece was S45C. The forging temperature was in the range of 1100◦C to 1250◦C and graphite was used as a lubricant. In order to search the causes of such defects formation above in the products during deformation, this investigation emphasized on two process parameters: the radius values in the region of corner and fillet of closed-dies forging. The reason for this is that both parameters affect the material flow inside the dies. From the numerical simulation results of forging processes obtained by employing the finite volume method (FVM) commercial package called: MSC. SuperForge, it could be found that the material flow was improved when increasing the values of radius corner and fillet of forging dies. It has also been seen that a maximum density of material flow was happened in the position near the edge radius corner of closed-dies. With real experimental tests, in addition, it was shown that wrinkles occurred in the region around the shoulder of forged products tended to decrease with the increment of two process parameters mentioned, as well. After modification of dies shape by increasing the values of radius corner and fillet about 12.5 %, the good numerical predictions have been achieved. However, when adding the blocker into such forging process, the results from simulation obtained showed that the deformation forces of finished dies tend to decrease. Thus, forging dies can make the number of products more than 5,000 units.

King Mongkut's University of Technology North Bangkok. Central Library

Address: Bangkok

Email: library@kmutnb.ac.th

Created: 2010

Modified: 2011-03-21

Issued: 2011-03-21

บทความ/Article

application/pdf

BibliograpyCitation : Asian International Journal of Science and Technology in Production and Manufacturing Engineering. Vol. 3, No. 2 (Apr. - Jun. 2010), p. 23-28

eng

©copyrights King Mongkut's University of Technology North Bangkok

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