Automation of Assembly — Application Potential and Preconditions—

PurposeThe purpose of this paper is to design a new method to realize automatic assembly of aircraft components with large shafts such as canard and vertical tail. The assembly structure of component with large shaft and fuselage is a mating assembly structure, and it is a challenge to satisfy the precision and assembly requirement.Design/methodology/approachAccording to the assembly structure features and process requirements of an aircraft component with large shaft, the operating principle of precise assembly system for shaft-hole mating is analyzed in this paper. The model of compliant assembly for shaft-hole mating is constructed, and force condition analysis of the compliant assembly is performed. An automatic precise shaft-hole assembly method for aircraft assembly using 5 degrees of freedom spatial mechanism, compliance technology and servo feeding system is put forward based on the analysis. A 5 degrees of freedom passive compliant experimental equipment has been developed.FindingsApplication test results of the 5 degrees of freedom passive compliant experimental equipment show that the simulated canard can be mated automatically and accurately through this method with high efficiency and high quality as long as the tip of shaft enters into the range of hole’s chamfer.Practical implicationsThis method has been used in an aircraft assembly project. The practical results show that the aircraft components with large shafts can be mated automatically and accurately through this method with high efficiency and high quality.Originality/valueThis paper presents a new method and designs a new assembly system to realize the assembly of the aircraft components with large shafts. The research will promote the automation of fuselage assembly.

The automatic assembly of photo products has been developed by Nikon Corp. over more than ten years. Automatic assembly methods are historically classified into three categories: dedicated machines, semi-flexible automatic assembly systems, and universal automatic assembly systems. This paper surveys these types of automatic assembly systems. First, automatic assembly systems for mechanical components of photo products are considered, and their background and design policies discussed. Next, the performances of these assembly systems and the results achieved in practise are described. Finally, the future trends of photo product automation are outlined.

The engine is one of the key core components in aircraft, in order to enhance automation and efficiency in the process of installation and disassembly for current small engine, using automatic control technology, a set of automatic disassembly and assembly system for aircraft engines is developed to replace the traditional mechanical installation vehicle. Corresponding for small engine to study the automatic disassembly system, the system uses laser sensors to locate the engine disassembly and assembly. Servo motors are used to drive the walking mechanism, lifting mechanism, and fine-tuning mechanism to realize multi-degree-of-freedom adjustment during engine disassembly and assembly. And the digital video is used to monitor the gap collision. Finally, the paper realizes the automatic high-precision disassembly and assembly of small engines. Through verification, the efficiency of the disassembly and assembly system has increased by more than 70%, the work efficiency has been greatly improved.

The helicopter fuselage has the characteristics of compact structure space, complex coordination relationship and weak rigidity, etc. It is difficult to control the accuracy of the desired shape. According to the high precision and quality requirement of final assembly for helicopter fuselage, the application status of automatic assembly technology in aviation manufacturing was analyzed. Then the difficulties of automatic assembly technology for fuselage final assembly were also discussed. In this paper, an automatic assembly system for the final assembly of helicopter fuselage was designed, and relevant key technologies of the assembly system mentioned above were proposed. The designed system have the functions of automatic positioning, clamping, measuring, drilling, feeding and blind fastener riveting for fuselage components, which can improve the assembly quality and efficiency of helicopter fuselage during the final assembly process.

The aim of this research is to support assembly lines designers in conceiving new processes with optimal automation levels selection. Several alternatives with various automation options may exist. Graphic representations and analyses of the different designs are needed. The finality is to offer a quick, exhaustive, and reliable way of modelling alternatives based on a given product design. In this sense we propose a new assembly tasks vocabulary to be combined to an existing lower layer vocabulary of elementary motions and a graphic modelling language. These developments deal with an existing automation decision approach as an extension allowing to overcome identified gaps and to ease its implementation and computerization. The proposal facilitates assembly systems alternatives generation with automation options consideration based on an initial representation. The generated alternatives are then subject to further analyses with regard to automation criteria and performance indicators considering planned production targets.

The author analyzes the problems existing in the traditional assembly system and puts forward a new method based on the motor control. This paper introduces the design and development of the automatic assembly system of ultrasonic cleaning transducer. In the system we use photoelectric isolation technology to solve the problems that driving circuit interference control chip while using a chip control many motors and this simplify the assembly system structure, reduce the cost of the assembly system and improve the assembly system automation and precision.

SUMMARY An automatic planning system for robotic assembly must have knowledge of the workspace. In particular it must be capable of reasoning about the shape of objects within the workspace. This requires a knowledge of object features and their behaviour in assembly situations. In this paper, a system is presented which extracts features relevant to assembly and machining from a boundary model derived from a Constructive Solid Geometry representation of a complex shape. In particular, finding concavities plays an important role in identifying possible mating features for assembly. These relevant features can then be used for assembly planning based on finding compatible sets of mating features. In this work the CAD data is extracted from a boundary model represented in an ASCII file and converted into the data-structures of the AI language, Prolog.

This article shows the consequences of using parts with scrap in an automatic assembly system. The scrap is the percentage of parts that do not reach the required conformity and will cause either a defective assembly or a jam in the system. The two consequences considered here are extra cost and loss of productivity. To show this, we will focus on one part assembly operation anywhere in the process, which consists of feeding, assembling the part and inspecting the resulting sub-assembly.

The aim of this research is to determine and analyze the role of leaders in shaping organizational culture within the Directorate General of Teachers and Education Personnel of the Ministry of Education, Culture, Research and Technology and to look at supporting and inhibiting factors as well as strategies for improving organizational culture within the Directorate General of Teachers. and Education Personnel from the Ministry of Education, Culture, Research and Technology. This research was conducted using a descriptive qualitative approach method. Primary data sources (data that can be obtained from interviews) and secondary (data obtained and reading sources). The results of the research are that the role of leaders in forming an organizational culture which is measured through being innovative, results-oriented, oriented to all employee interests and detail-oriented in tasks is running according to the rules set in the organization and each employee carries out individual performance indicators as the output of their routine work. Supporting factors include a disciplined attitude that each employee has, understanding the action program and vision and mission of the organization, good communication between leaders and work partners in achieving results, building motivation of leaders and subordinates, administrative processes as performance assessments for each employee. However, the inhibiting factors are that there is no awareness regarding work discipline, there is no employee commitment in carrying out their duties and functions, not all employees fully understand the vision and mission of the organization, there are still high school education so that a work system has not been developed systematically and there is a lack of employee motivation. in increasing competence. The strategy used to improve organizational culture is to create a uniform understanding of the organization's vision and mission using activities such as training or workshops, building training to improve employee competency, building a measurable and transparent reward and punishment system and evaluating the results of employee performance and output. which is done.

Development of a novel integrated automated assembly system for large volume components in outdoor environment

Error compensation of industrial robot based on deep belief network and error similarity

Advantages of Sub-Batch Principle in Flexible Automatic Assembly as Used in the IVF-KTH Concept Mark II

Screw assemblies of radar are characterized by numerous densely distributed small screws of various types, rendering their manual assembly difficult and inefficient. To improve the assembly quality and efficiency, an automatic assembly system was developed. First, the position and attitude relationships among the workpiece, camera, and base coordinate systems of the manipulator were obtained using three-point location and nine-point calibration methods. Second, a visual servoing strategy is designed for guiding the manipulator such that its position can be adjusted adaptively to achieve the high-precision positioning of threaded holes. Third, a method for evaluating assembly quality is developed. The templates of angle–torque curves of various screws were produced by fitting experimental data. Furthermore, the assembly quality was determined by calculating the similarity between the angle–torque curves and templates based on the Fréchet distance. Finally, the feasibility was verified using a flat plate component with five threaded holes.

Robotic assembly of smartphone back shells with eye-in-hand visual servoing

Advances in robotics and assembly automation have suggested that it might be feasible to fabricate prototypes from assemblies of regular shapes for low cost manufacturing and visualization. This paper presents an automated assembly system to investigate the feasibility of this idea.