Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Investigation of Modified Cutting Insert with Forced Coolant Application in Machining of Alloy 718
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-0895-3303
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)
GKN Aerospace Engine Systems AB, Trollhättan, 461 81, Sweden.
2016 (English)In: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 42, 481-486 p.Article in journal (Refereed) Published
Resource type
Text
Abstract [en]

Abstract In the last decades machining methods have witnessed an advancement in both cutting tools and coolant/lubrication, sometimes in combination with high pressure jet. The aim of this work is to investigate a modified cutting insert with forced coolant application, FCA, how it influences the tool-chip contact in the secondary shear zone and how it affects the tool wear when turning Alloy 718. During the machining process the main and frequent problems are heat generation and friction in the cutting zone, which has a direct impact on the cutting tool life. High pressure jet cooling have headwayed the cutting technology for the last five decades, showing an improvment of tool life, reduced temperature in the cutting zone and better surface integrity of the workpiece. These developments have practically enhanced the capability and quality in machining of superalloys. This paper is an advancement of the previous work, increasing surface area of the insert, with a additional channel design to improve the coolant reachability in the tool-chip contact area on the rake face. The influence in tool wear has been investigated. Through a set of experiments, a channel design insert with forced coolant application, has shown about 24-33% decrease in tool wear compared to only a textured insert. Hybrid inserts with its cooling and channel features have even widened the operational cutting region with significantly less tool wear.

Place, publisher, year, edition, pages
2016. Vol. 42, 481-486 p.
Keyword [en]
Turning, Alloy 718, Modified cutting insert, Tool wear, Secondary shear zone, Forced coolant application
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering; Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-9245DOI: 10.1016/j.procir.2016.02.236Scopus ID: 2-s2.0-84966621725OAI: oai:DiVA.org:hv-9245DiVA: diva2:912872
Conference
18th CIRP Conference on Electro Physical and Chemical Machining (ISEM XVIII)
Available from: 2016-03-18 Created: 2016-03-18 Last updated: 2017-10-06Bibliographically approved
In thesis
1. Textured insert for improved heat extraction in combination with high-pressure cooling in turning of superalloys
Open this publication in new window or tab >>Textured insert for improved heat extraction in combination with high-pressure cooling in turning of superalloys
2017 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Heat generated in a machining process is a common and critical obstacle faced in today's machining industries. The heat generated in the cutting zone has a direct negative influence on the tool life which, in turn contributes to increase the manufacturing costs. Especially, in machining of Heat Resistant Super Alloys, HRSA this is a very limiting factor. HRSA are capable of retaining their mechanical strength and hardness at elevated temperatures. This property is advantageous in the application in e.g. aero-engines but also a disadvantage, since it also lowers the machinability significantly. This work is an attempt to improve the heat transfer from the cutting zone, which would lead to an increase in the tool life. To achieve this goal, the cutting tool has been modified to create an improved interface between the coolant and tool in the high-temperature areas. Two generations of inserts have been designed and investigated. Firstly, an insert with surface texture features has been created with the purpose of increasing the available surface area for heat dissipation: First generation, Gen I. Secondly, a GenII was designed as a further improvement of Gen I. Here, several channel features on the rake face were added, reaching out from the contact zone to the near proximity of the cutting edge. This with the purpose of improving access of the coolant closer to the cutting edge. The experiments were conducted in facing operations of Alloy 718 with uncoated round carbide inserts. All experiments were carried out with high-pressure coolant assistance, with a pressure of 16 MPa on the rake face and 8 MPa on the flankface, respectively.The two generations of inserts, Gen I and Gen II, were experimentally evaluated by tool wear analysis in comparison with a regular insert. The results shows that the tool life increased significantly for the Gen I insert, compared to a catastrophic failure of the regular insert at the same conditions. Regarding the Gen II insert,an increase in tool life by approximately 30 to 40 percent compared to Gen I insert was observed.

Place, publisher, year, edition, pages
Trollhättan: University West, 2017. 90 p.
Series
Licentiate Thesis: University West, 19
Keyword
Alloy 718; High-pressure coolant; Heat dissipation, Textured insert; Tungsten carbide, Tool life, Tool wear
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
urn:nbn:se:hv:diva-11738 (URN)978-91-87531-63-7 (ISBN)978-91-87531-62-0 (ISBN)
Presentation
2017-10-12, F315, University West, Trollhättan, 13:00 (English)
Supervisors
Available from: 2017-10-06 Created: 2017-10-06 Last updated: 2017-10-06Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Tamil Alagan, NageswaranBeno, Tomas
By organisation
Division of Subtractive and Additive Manufacturing
In the same journal
Procedia CIRP
Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 124 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf