Study on CAM Software for Additive Manufacturing with FDM Method

Koizumi, Satoru; Kawamura, Takehiro; Mochizuki, Tatsuya

doi:10.20965/ijat.2017.p0835

IJAT

2017

DOI: 10.20965/ijat.2017.p0835

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Study on CAM Software for Additive Manufacturing with FDM Method

Satoru Koizumi¹,

Takehiro Kawamura²,

Tatsuya Mochizuki³

Abstract: A prototype hybrid machine was manufactured by combining five-axis laminate-shaping and five-axis cutting, and a CAM was developed for additive manufacturing under simultaneous five-axis control. Using a CAD surface as a shape-model for the laminate-shaping, the reproducibility of a shape in laminate-shaping or cutting was successfully enhanced. Moreover, a combination process of laminate-shaping and cutting was successfully defined by decomposing a shape into multiple parts. The prototype machine and CAM deve… Show more

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Cited by 2 publications

References 11 publications

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Development of Path Generation Method for Five-Axis 3D Printer

Nishikawa¹,

Morimoto²,

Hayashi³

2019

IJAT

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3D printers that use the fused deposition modeling (FDM) method are generally based on a three-linear-axis mechanism. However, because the posture of the workpiece is limited, the shape of the model that can be generated by this type of 3D printer is restricted. The 3D printer makes 3D models by stacking up materials on a plane. Because of this principle, a base to support the laminated material is necessary, and it is impossible to develop a model shape with an overhang without support parts. Although the problem is solved by making a foundation using a support material, it takes time to shape and remove the material. Therefore, this conventional method is time consuming. The purpose of this research is to laminate and make shapes that are difficult to laminate with a three-axis 3D printer without using support material. Therefore, a new five-axis 3D printer was developed with the FDM method, and its control program was designed. In addition, hardware consisting of the mechanical structure and the servo control system was developed, and the laminating path, which can exert the effect of the five-axis mechanism, was calculated. The posture of the workpiece can be controlled by mounting the B-axis, which tilts the lamination table, and the C-axis, which rotates the lamination table added on the three-axis configuration 3D printer. Furthermore, a five-axis synchronization control program was developed to control the motion of the five-axis synchronous motion. Furthermore, to correct the nozzle position due to the posture change of the workpiece, a mathematical model of shape creation theory was applied to derive the offset command value. As a result of the laminating experiments of the overhang shape model, the five-axis mechanism and laminating path were sufficiently effective, and the five-axis synchronous control of the 3D printer demonstrated the creation of the overhang shape. However, in experiments using a conventional three-axis mechanism 3D printer with the same lamination path, resins did not adhere and dripped, making shaping impossible. Because of these results, the machining time of the five-axis controlled 3D printers was shorter than that of conventional three-axis-controlled 3D printers. Here, the basic configurations and control system are reported.

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Development of Path Generation Method for Five-Axis 3D Printer

Nishikawa¹,

Morimoto²,

Hayashi³

2019

IJAT

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Shell Forming for Improving Additional Cutting Properties of Additively Manufactured Parts

Sawano,

Kodama

2023

IJAT

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Additive manufacturing (AM) has become a major manufacturing technology in recent years. In the fused deposition modeling (FDM) method, two-layered parts with a shell structure and an internal structure with gaps are often manufactured. When cutting is applied to such parts, the internal structure is exposed and the surface texture and strength deteriorate. Therefore, it is necessary to remanufacture the parts to correct the shape or fill the inside with resin for additional machining. However, if parts are remanufactured or filled with resin, the amount of material used increases, along with the processing cost and environmental load. If the characteristics of additional machining can be improved, the amount of material used, the processing cost, and environmental load can be reduced. Therefore, in this study, we proposed a shell forming method to form a shell structure by processing the surface of the exposed internal structure with a rod. Shell forming experiments were then conducted to evaluate the characteristics of the method. It was found that the shell thickness can be increased by increasing the shell forming depth, and the difference from the theoretical shell thickness grows larger when the shell forming depth increases. Increasing the rotation speed of the rod was effective in increasing the shell thickness. In addition, as a result of the additional cutting experiment on an AM part, it was confirmed that the properties of the additional cutting surface can be improved using the proposed method.

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Study on CAM Software for Additive Manufacturing with FDM Method

Cited by 2 publications

References 11 publications

Development of Path Generation Method for Five-Axis 3D Printer

Development of Path Generation Method for Five-Axis 3D Printer

Shell Forming for Improving Additional Cutting Properties of Additively Manufactured Parts

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