Error
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering

TECHNOLOGY OF CONSTRUCTION PROCEDURES. MECHANISMS AND EQUIPMENT

Drilling in heat resistant cast stainless steel DIN 1.4848 for turbocharger housings

Vestnik MGSU 11/2013
  • Heiler Roland - Hochschule für Technik und Wirtschaft (HTW-Berlin) Doctor of Engineering, Professor, Hochschule für Technik und Wirtschaft (HTW-Berlin), Treskowallee 810318, Berlin, Germany; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Zeilmann Rodrigo Panosso - Universidade de Caxias do Sul (UCS) Doctor of Engineering, Professor, Universidade de Caxias do Sul (UCS), Rua Francisco Getúlio Vargas, 1130, 95070-560, Caxias do Sul, RS, Brazil.
  • Estel Göran - Hochschule fürTechnik und Wirtschaft (HTW-Berlin) Master of Engineering, Hochschule fürTechnik und Wirtschaft (HTW-Berlin), Treskowallee 810318, Berlin, Germany; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kauer Thomas - Hochschule für Technik und Wirtschaft (HTW-Berlin) Bachelor of Science, Hochschule für Technik und Wirtschaft (HTW-Berlin), Treskowallee 810318, Berlin, Germany.
  • Köller Moritz - Hochschule für Technik und Wirtschaft (HTW-Berlin) Bachelor of Science, Hochschule für Technik und Wirtschaft (HTW-Berlin), Treskowallee 810318, Berlin, Germany.

Pages 132-140

Modern turbochargers are important components to reduce the gasoline consumption on actual and future engines. The reduction of the cubic capacity (downsizing) of an engine with a simultaneous increasing power, reduced gasoline consumption and asignificant decrease of COoutput is only possible by using modern turbocharger tech-nology and fuel injection systems. The temperature in the housings will reach ca. 1050°C and it is necessary to use austenitic cast steel like 1.4848 for the housings. Drilling and threading are quite difficult technologies in this material.The experiment conducted by the authors showed, that for the machining of heat resistant cast stainless steel 1.4848 totally different drill designs are recommended from the precision tool manufactures. For a reduced or smaller axial force, cutting torque and a slower increase of the tool wear with an indication of longer tool life the following geometries does have positive aspects: a concave or straight cutting edge with a small cutting edge radius provides decrease in process parameters and a longer tool life. A reduction of the helix angle in combination with a straight nearly sharp cutting edge (small radius) provides also good results. Convex main cutting edges and high cutting edge radii or strong facets delivers higher forces and cutting torques in combination with a stronger corner edge wear. For a stabilization of the cutting corner edge, this part of the drill should be slightly rounded or produced with a small facet. A small land of the drill in combination with a step grinding gives advantages in comparison to wider lands with a continuous transition, due to reduced friction and a lower tendency of cold welding or build up edge.

DOI: 10.22227/1997-0935.2013.11.132-140

References
  1. Albrecht B. Abgasturbolader von Bosch Mahle Turbo Systems. Pressemitteilung der Bosch Mahle Turbo Systems. Frankfurt a.M., September 2009.
  2. Junker H.-K. Die zweistufige Aufladung wird Mainstream. Interview, ATZ online. 2008.
  3. Miklin A. Entwicklung einer Fertigungstechnologie f?r d?nnwandigen Stahlguss. Dissertation TU Freiberg. 2010.
  4. Zentrale f?r Gussverwendung-ZGV, Hrsg. Feingie?en, Herstellung, Eigenschaften, Anwendungen. Konstruieren + Gie?en. D?sseldorf, Deutscher Gie?ereiverband, 2008, no. 33, H. 1.
  5. Staneff H., Strieber B., Weber R., Zimmer H. Hei?e L?sung — Edelstahl f?r Lader. Gie?erei-Praxis, 2007, no. 6, pp. 246.
  6. Schmier M. Randzonenver?nderungen beim Bohren und ihre Auswirkungen auf Folgebearbeitungsverfahren. Dissertation Universit?t Kassel, 2004.
  7. Bargel H.-J., Schulze G. and others. Werkstoffkunde. Springer-Verlag Berlin Heidelberg, 2005, no. 9.

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Threading in heat resistant cast stainless steel DIN 1.4848for turbocharger housings

Vestnik MGSU 12/2013
  • Heiler Roland - Hochschule für Technik und Wirtschaft (HTW-Berlin) Doctor of Engineering, Professor, Hochschule für Technik und Wirtschaft (HTW-Berlin), Treskowallee 810318, Berlin, Germany; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Zeilmann Rodrigo Panosso - Universidade de Caxias do Sul (UCS) Doctor of Engineering, Professor, Universidade de Caxias do Sul (UCS), Rua Francisco Getúlio Vargas, 1130, 95070-560, Caxias do Sul, RS, Brazil.
  • Estel Göran - Hochschule fürTechnik und Wirtschaft (HTW-Berlin) Master of Engineering, Hochschule fürTechnik und Wirtschaft (HTW-Berlin), Treskowallee 810318, Berlin, Germany; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Cordes Oliver - Hochschule für Technik und Wirtschaft (HTW-Berlin) Master of Engineering, Hochschule für Technik und Wirtschaft (HTW-Berlin), Treskowallee 810318, Berlin, Germany; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 93-100

Urbochargers are important components to minimize the petrol consumption of modern gasoline engines. The temperature in the turbocharger housings can reach until1.050 °C. Due to this reason, high heat resistant stainless steel, like the material DIN1.4848 with a high quantity of nickel (up to 25 %) and chrome (up to 20 %) is used in this application. During metal cutting operations the temperature at the cutting edge will increase due to the high quantity of nickel and the abrasive wear will be created by the chrome carbides within the cast material. The material hardness can increase by the machining process. Drilling and threading are one of the most critical machining operations in this material, because a huge frication area exists between the material and the tool. This provokes a high friction and the possibility of built-up-edge at the cutting edge which provides the rapid wear of the tool. In this part of the development project the tool life of different threading tools was analyzed. Taps in HSS-Co-PM and solid carbide were available for the tool life tests. The possibility to use the cold forming technology for threading was also analyzed. The strength of the internal threads was tested with pull out tests according DIN 898-2.

DOI: 10.22227/1997-0935.2013.12.93-100

References
  1. Albrecht B. Abgasturbolader von Bosch Mahle Turbo Systems. Pressemitteilung der Bosch Mahle Turbo Systems. Frankfurt a. M., September 2009.
  2. Cordes Oliver. Untersuchungen zur Innengewindefertigung in hitzebe-st?ndigem Edelstahlguss f?r Turboladergeh?use. Master-thesis, HTW-Berlin 2012. Zentrale f?r Gussverwendung-ZGV, Hrsg. Feingie?en, Herstellung, Eigenschaften, Anwendungen. Konstruieren + Gie?en. D?sseldorf, Deutscher Gie?ereiverband, 2008, no. 33, H.1.
  3. DIN898-2. Mechanische Eigenschaften von Verbindungselementen aus Kohlenstoffstahl und legiertem Stahl — Teil 2: Muttern mit festgelegten Pr?fkr?ften — Regelgewinde (ISO/DIS 898-2:2009). Berlin, Deutsches Institut f?r Normung e.V., 2010.
  4. Schmier M. Randzonenver?nderungen beim Bohren und ihre Auswirkungen auf Folgebearbeitungsverfahren. Dissertation Universit?t Kassel, 2004.

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