Vector approach in modeling the accuracy of body parts holes manufacturing in aspect of the additive technologies application

The article deals with the issues of ensuring the specified accuracy in the processing of the coaxial and intersecting body parts holes. Features of a details design this type body parts are considered. Parametric analysis was performed, and the key parameters affecting the accuracy of machining body parts internal holes were identified. It is offered at development of details production technology to use in the course of technological parameters system calculation of the vector equations which solution is the only combination of technological parameters of processing of body parts holes. The geometric parameters that determine the position of the basing holes in space are determined. In the vector form shows the influence of the location errors of the base holes and the intersecting and coaxial body parts holes during processing. A spatial calculation scheme for determining the error of the arrangement of the group of coaxial holes of the body part is presented. The work compares results of simulation of the processing errors of the body type parts holes of the for standard cycles for machining holes with the simulation results of the error processing errors of the body type parts holes of manufacturing processes based with additive technologies. It is established a significant impact on the accuracy of the holes location the rotation of details in the working area of the machine, as well as its reinstallation. The efficiency of application of hybrid technological cycles based on additive technologies in the production of coaxial holes in the body type parts is shown.

[1]  P. A. Ogin,et al.  Block-Modular Principle of Build Composition Automatically Changeable Laser Modules for CNC Machines , 2017 .

[2]  S. Palanisamy,et al.  Effect of energy per layer on the anisotropy of selective laser melted AlSi12 aluminium alloy , 2018, Additive Manufacturing.

[3]  P. Ferro,et al.  Effect of Heat Treatment on Commercial AlSi12Cu1(Fe) and AlSi12(b) Aluminum Alloy Die Castings , 2018, Metallurgical and Materials Transactions A.

[4]  Effect of process parameters on the surface characteristics of AlSi12 samples made via Selective Laser Melting , 2017 .

[5]  Ramona Eberhardt,et al.  Precision manufacturing of a lightweight mirror body made by selective laser melting , 2018, Precision Engineering.

[6]  High strain rate behaviour at high temperature of AlSi12 parts produced by selective laser melting , 2018, IOP Conference Series: Materials Science and Engineering.

[7]  E. Kaschnitz,et al.  Simulation of distortion and residual stress in high pressure die casting – modelling and experiments , 2012 .

[8]  S. Palanisamy,et al.  High strain rate dynamic behaviour of AlSi12 alloy processed by selective laser melting , 2018 .

[9]  P. Livieri,et al.  Mode I Stress Intensity Factors for triangular corner crack nearby intersecting of cylindrical holes , 2013 .

[10]  F. Walther,et al.  Fatigue Assessment of Laser Additive Manufactured AlSi12 Eutectic Alloy in the Very High Cycle Fatigue (VHCF) Range up to 1E9 cycles , 2016 .

[11]  Kamran Mumtaz,et al.  AlSi12 in-situ alloy formation and residual stress reduction using anchorless selective laser melting , 2015 .

[12]  D. Gu,et al.  Laser energy absorption behavior of powder particles using ray tracing method during selective laser melting additive manufacturing of aluminum alloy , 2018 .

[13]  F. Walther,et al.  Very high cycle fatigue and fatigue crack propagation behavior of selective laser melted AlSi12 alloy , 2017 .

[14]  R. Pastirčák,et al.  Effect of Technological Parameters on the AlSi12 Alloy Microstructure During Crystallization Under Pressure , 2017 .

[15]  R. L. Johnson,et al.  Stress-concentration factors at intersecting and closely approaching orthogonal coplanar holes , 1977 .