[en] The variation and uncertainty existed in every process and considered as an essential element in precise, accurate and high-quality manufacturing, especially in the Industry 4.0 era. Manufacturing quality and reliability is affected by variations and uncertainties in different process parameters and influencing factors. The variations and uncertainties are considered very critical in measurement and monitoring process, i.e., prediction or prognostics. These variations and subsequent uncertainties are needed to be identified, quantified, analyzed and controlled. This paper presents an approach to uncertainty measurement and analysis in manufacturing. The key characteristic parameter is identified which is critical for final product quality and reliability. To determine the uncertainty in the specific parameter, the uncertainty factors of both the manufacturing process and measurement process are determined. The combined uncertainty is determined by considering the influencing factors both in manufacturing and measurement process. The relation of each factor to the key parameter is analyzed and the sensitivity coefficient is determined mathematically or experimentally. The combined and expanded uncertainty is determined considering all related factors. The proposed approach has been applied to an additive manufacturing technique, and useful results are achieved. (paper)

[en] We present an approach to learn about electricity and dc electric circuits by using real representational models based on the gravitational analogy. The additively manufactured models are deployed in a small-scale teaching intervention on electric potential and voltage in simple electric circuits. From the preliminary results considerable learning gains can be inferred. (paper)

[en] 3D printers are being explored by many of the industrial giants and daily customers as an excellent replacement for some of the traditional, inefficient, costly and waste producing techniques of manufacturing. Although, still at a premature state of development, and being thoroughly researched upon, there is lack of data concerning the physical strength or a proper machine design development for this 3-axis automated machine. Other, while being able to create a robust machine, over-utilize the resources. In this paper, we attempt to explore how analysis of vibration using minimal equipment could refine the quality of 3D printing as well as how would one improve the design to yield best results. The study is most relevant for the online open source community e.g. RepRap, within the development in new 3d printers design. (paper)

[en] The paper discusses the use of 3D digitization and additive manufacturing technologies in the field of medicine. The paper focuses on design and manufacture of an orthopedic corset. Described are the methods of designing and manufacturing of orthopedic corsets according to the individual requirements of the patient at present, and a more detailed description of the design and manufacturing process using 3D digitization and additive manufacturing. The paper introduces three variants of corset design and manufacture, with the description of the materials selected for use. The main purpose of the paper is to describe the process of the effective design and manufacture of orthopedic corset using 3D digitization and additive manufacturing technologies. (paper)

[en] The current situation on a field of 3D print does not allow significant changes in the printer’s construction. 3D printer’s build area is often a limiting factor. The goal of this project is the design of a modular construction of a 3D printer. In the future, that would mean, that after purchase and after query for increasing build area, it would be necessary just to connect another unified block. All the changes could allow rapid modification of the printer’s properties without increasing cost or rebuilding construction. As a result, it was able to develop a construction that is able to expand the build area at one axis. It is able to expand the build area with almost no limit in one direction. (paper)

[en] With the development of 3D printing technology, the application of 3D printing has become more and more widespread, and the 3D printing efficiency problem that ensued has caused more and more researches. This paper will use the melt deposition type (FDM) forming printer. The printing consumables PLA and cylinder model were used as objects to study the effect of slice height on printing time, consumables, and dimensional accuracy and related parameters were optimized. The results showed that when the layer height was 0.14mm, he shortest printing time can be obtained on the premise of ensuring the quality of printing. (paper)

[en] Soft actuators made of soft materials can exhibit compliant behavior but tend to generate large vibrations in dynamic environments because of poor damping performance. Here, we integrate the particle-jamming technology with three-dimensional (3D)-printing technology to enhance the damping performance, with a goal of establishing a lightweight and reliable approach of damping for the soft actuators. An analytical model for energy dissipation is presented, which can reveal the dependence of the damping performance on various parameters including vacuum pressure, particle chamber dimensions, and particle properties. Then, 3D-printed particles with different sizes and different surface topographies are fabricated. The theoretical analysis and experimental results are combined to investigate the dependence of the particle chamber’s damping effect on specific parameters such as vacuum pressure, the dimensions of the particle chamber, and the diameter and surface topography of the particle. Accordingly, the damping for the soft chamber with particles can be tuned well. The experimental results show that up to a six-fold increase in damping ratio is achieved. Thus, this research can provide insights for designing soft actuators where vibration suppression is important, particularly in some dynamic environments. (paper)

[en] 4D printing deforms a 2D foldable structure to another shape evolve over time by using heterogeneous material. The deformation of the 2D foldable structure is stimulated by actuators that are fabricated by shape memory materials or bilayer structures. Therefore, the deformation programming method of actuators is a critical technology in 4D printing. This paper proposes a method for programming the deformation of a temperature-driven bilayer structure actuator in 4D printing. The thermo-mechanical mechanism of the bilayer structure actuator is analyzed and three kinds of deformation behavior are modeled. Then a constitutive model with five main deformation programming parameters including the line width, the print height, the print temperature, the filled form, and the stimulation temperature is fitted by the orthogonal experiment and response surface method. The permanent deformation of the bilayer structure actuator results from the programmed parameters and time evolution of the 3D printed structure upon heating. A typical temperature shape memory material polylactic acid is used as a case study to illustrate the methodology and a desired programmed deformation is achieved. (paper)

[en] This paper presents an overview of 3D Printing methods of Piezoelectric materials [PEM] using various poling techniques, such as corona poling, contact poling, and other poling process, the method of integrating the 3D printing and poling, enables to print any type of sophisticated shaped sensors in single step, several conventional methods require complicated and time-consuming procedures, the 3d printing integrated with poling possess method and material constraints, the steps to minimize the technical challenges are under research. (paper)

[en] Over several years additive manufacturing has grown and displaced traditional methods. Present market was occupied by 3D printers in rapid prototyping field. Numerous examples are indicated where additive manufacturing has entered new markets and picked up larger part advertise. In this task we investigate the use of additive manufacturing over customary assembling and the possibility of the disturbance of conventional techniques like injection molding. The possibility is dictated by a similar examination of the cost to influence parts according to bunch premise. We at that point decided the make back the initial investment point and the relationship to the general cost structure. (paper)