Manufacturing Technology Today

B. Dattatreya ¹, K. Anil Kumar ¹, R. Murali Krishna ¹, V. A. P. Sarma ¹, S. K. Verma ¹, S. Arumugasamy ¹, N. Balashanmugam ¹

Affiliations
1 Central Manufacturing Technology Institute (CMTI), Tumkur Road, Bengaluru, IN

Abstract

Lapping is one of the techniques where form and surface roughness are controlled on surface like flat, cylindrical and spherical shape. Now a days with optimized parameters and the process is being applied to any material and shape which are not subject to plastic deformation due to their own weight or to mechanical load by machining. It is used less for finish and more for form accuracy, such as flatness in the case of flat objects or sphericity in the case of spheres. The parameters optimization is key factor for lapping spherical surface. This paper gives brief about development of Sphere Lapping Attachment for CNC Lathe with Spherical tolerance accuracy within 1 micron for lapping spherical surface with scratch-free, mirror finish high-quality surface. This Attachment is effective on stainless steel and Cobalt Chrome (Co Cr) alloyed metals.

Keywords

Lapp Tool, Lapping Paste, Lapping Attachment, Surface Roughness, Surface Finish, Sphericity, Roundness, Form, Co Cr, etc.

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B. N. Manjunath ¹, Prafullakumar Chaudhari ², Hemant Pawar ², S. K. Verma ¹, S. S. Anasane ²

Affiliations
1 Central Manufacturing Technology Institute( CMTI), Tumkur road, Bengaluru, IN
2 PGD Additive Mfg., College of Engineering Pune, Shivajinagar, Pune, IN

Abstract

Selective laser melting (SLM) is a metal additive manufacturing (AM) process which is used for fabrication of complex geometry parts layer by layer directly from 3D CAD model. SLM gives boundless opportunities to build highly complex shapes which are not possible to achieve by traditional manufacturing process. however, SLM is not totally freeform fabrication as it has inherent process limitations. Design engineers frequently lack an understanding of these process limitations and their impact on the final part. Here comes the need for developing design guidelines for AM processes to help design engineers while designing the part for selective laser melting. This paper reviews general design guidelines that to be considered for building the part through SLM process. Research papers regarding support structure generation, part orientation and topologically optimization are referred. These rules aim to reduce cost, build failures, built time and wastage of material.

Keywords

Additive Manufacturing, Selective Laser Melting, Design Guidelines.

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B. N. Manjunath ¹, A. R. Vinod ¹, S. K. Verma ¹, N. Balashanmugam ¹

Affiliations
1 Central Manufacturing Technology Institute(CMTI), Tumkur road, Bengaluru, IN

Abstract

Additive manufacturing has changed the way products are designed, manufactured and distributed to the consumers. It has made possible to create products previously thought too complex. Aerospace, medical, automotive and energy sectors started using additive manufacturing as they realised its potential innovation, financial and efficiency benefits. Despite the progress, there are still challenges that must be addressed, including improving the throughput, Accuracy and repeatability, surface roughness, mechanical properties, establishing standards and protocols, modelling and simulation to reduce the residual stress, certification and reducing the raw material cost. This article gives insights into the present barriers hindering the widespread adoption and research opportunities in metal additive manufacturing.

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