Manufacturing feasibility analysis and load carrying capacity of computer numerical control cut joints with interlocking assembly feature

The basic manufacturing feasibility and load carrying capacity of computer numerical control (CNC) were evaluated for router-cut joints. More precise and complex shaped geometry was cut on a CNC machine so that joint strength increased via providing a better self-locking system. Using the design for manufacture and assembly (DFMA) analysis, the raw material type and joint design were determined as the main drivers that have direct influence on the processing time and yield of the manufacturing process. Moreover, the bending moment capacity of the joints was determined in compression and tension testing and benchmarked those of rectangular mortise and tenon (RM&T) and dowel joints. The results showed that joints constructed of plywood performed better than those of medium-density fiberboard according to DFMA compliance score values. Moreover, the load capacity level of joints constructed of plywood provided stronger joints than MDF. In compression tests, CNC router-cut joints constructed of both plywood and MDF reached equal or higher strength relative to traditional joints. Furthermore, in tension tests, those of strength were lower compared to compression test results. The outcome of this study will contribute to the theoretical and practical knowledge of furniture joinery design.

[1]  Ernie Appleton,et al.  Product Design for Manufacture and Assembly , 2008 .

[2]  M. Selim Akturk,et al.  Single CNC machine scheduling with controllable processing times to minimize total weighted tardiness , 2011, Comput. Oper. Res..

[3]  Jerzy Smardzewski,et al.  The reliability of joints and cabinet furniture. , 2009 .

[4]  G. F. Barbosa,et al.  Guideline tool based on design for manufacturing and assembly (DFMA) methodology for application on design and manufacturing of aircrafts , 2014 .

[5]  Andrew N. Arnette,et al.  Design for sustainability (DFS): the intersection of supply chain and environment , 2014 .

[6]  K. Demeter,et al.  The impact of lean practices on inventory turnover , 2011 .

[7]  A.M.E. Bayoumi,et al.  DESIGN FOR MANUFACTURE AND ASSEMBLY (DFMA): CONCEPTS, BENEFITS AND APPLICATIONS , 2000 .

[8]  Christian Hofer,et al.  The effect of lean production on financial performance: The mediating role of inventory leanness , 2012 .

[9]  Steven Ashley.  Cutting costs and time with DFMA , 1995 .

[10]  G. F. Barbosa,et al.  Design for Manufacturing and Assembly methodology applied to aircrafts design and manufacturing , 2013 .

[11]  Zheng Chen,et al.  North American practices for connections in wood construction , 2006 .

[12]  Frank Lam,et al.  Structural performance of rounded dovetail connections under different loading conditions , 2007 .

[13]  Y. Z. Erdil,et al.  Bending moment capacity of rectangular mortise and tenon furniture joints , 2005 .

[14]  S. T. Newman,et al.  Design and implementation of machine tool static error feedback model , 2009, 2009 IEEE International Conference on Industrial Engineering and Engineering Management.

[15]  U. Müller,et al.  Strain Measurements within Fiber Boards. Part I: Inhomogeneous Strain Distribution within Medium Density Fiberboards (MDF) Loaded Perpendicularly to the Plane of the Board , 2012, Materials.

[16]  Shigehiko Suzuki,et al.  Effect of element type on the internal bond quality of wood-based panels determined by three methods , 2003, Journal of Wood Science.

[17]  Peihua Gu,et al.  Geometric accuracy allocation for multi-axis CNC machine tools based on sensitivity analysis and reliability theory , 2015 .

[18]  Joo-Saeng Park,et al.  Moment-Carrying Capacity of Dovetailed Mortise and Tenon Joints with or without Beam Shoulder , 2011 .

[19]  Sarada Prasad Sarmah,et al.  Modular product development through platform-based design and DFMA , 2012 .