Hui Yu Xiang

Defects Detection of Sheet Metal Parts Based on HALCON and Region Morphology

In order to realize the manufacturing defects detection of sheet metal parts, a kind of defects detection method of the sheet metal parts based on region morphology has been put forward based on HALCON using the mathematical morphology knowledge: by choosing the proper structuring element and neatly applying dilation, erosion, opening and closing on the defects images, the defect part is extracted. The experiment shows that the effect of this method is good and the calculation and processing speed is fast.

Fatigue Analysis of the Rotor Shaft on a High Speed Traction Motor

Rotor shaft is an important part in the high speed traction motor. In the process of the motor running，some rotor shaft may show the symptoms of fatigue crack，fracture and other issues．Therefore，it is essential to analyze its fatigue condition for these potential problems in the product design stage．In this paper，finite element analysis software NX. Nastran is used to analyzing the rotor shaft of traction motor from structural strength，fatigue strength and fatigue life respectively．The fatigue damage area and dangerous zone of the rotor shaft as well as its fatigue life can be predicted according to the simulation results，and which could provide a critical review for the following study and structural design of the traction motor．

Large Pendulum Bolt Failure Analysis and Countermeasures

This paper analyzed the causes of the bolt failure problem of pendulum for different working conditions using the finite element method. The simulation shows that the bolt fracture is due to relaxation caused by bolt slewing bearing and a flange partial slip on .The cause of the failure was the structure design lacking of effective anti-loosing measures. Finally, this paper put forward an effective design scheme to prevent bolts from damage during working process and proposed the specific measures and bolt failure countermeasures.

Modeling and Simulation Research of Time-Dependent Reliability Model of Link Rod in Needle Bar Mechanism

The time-dependent reliability model of Mechanical Component is influenced by many parameters such as stress, load, strength, strength degeneration and lifetime index. This paper builds the time-dependent reliability model when life is measured by the loading numbers. The variety law of mechanical component’s reliability with the lifetime is derived from the built model and simulation of link rod in needle bar mechanism used in the sewing machine. The result shows that the time-dependent reliability model is effective and the reliability of component decreases obviously with the loading numbers when the strength degeneration is considered.

Research on the Variety Law of Time-Dependent Reliability Model of Picking Link Rod in Sewing Machine

The reliability of mechanical component is a time-varied process because the parameters such as operation condition, load, strength, are varied with time or the loading numbers. This paper builds the time-dependent reliability model when life is measured by the loading numbers. The variety-law of component’s reliability with the lifetime is derived from the built model and simulation of picking link rod used in sewing machine. It is shown that the time-dependent reliability model is effective and the reliability of component decreases obviously with the time and the increasing load standard deviation.

Modeling and Simulation Research of Time-Dependent Reliability Model of Tooth Carrier in Feed Mechanism

The time-dependent reliability model of Mechanical Component is influenced by many parameters such as stress, load, strength, strength degeneration and lifetime index. This paper builds the time-dependent reliability model when life is measured by the loading numbers. The variety law of mechanical component’s reliability with the lifetime is derived from the built model and simulation of tooth carrier in feed mechanism used in the sewing machine. The result shows that the time-dependent reliability model is effective and the reliability of component decreases obviously with the loading numbers when the strength degeneration is considered.

Research of Vision Detection System Based on Regional Morphology

With the gradual development of industrial technology, visual measuring technique has been widely used in industrial field. In the automatic production, it is used in the analysis of objects characteristics, the detection of working condition and the control of quality. This paper mainly studies how the machine vision theory is applied in the practical detections, and develops the overall visual detection platform. It uses the serial port communication between VC++6.0 and Single-Chip Microcomputer to control the experimental platform. In order to realize to test the production defects, it uses the knowledge of mathematical morphology to put forward a defect detection method of production image based on regional morphology. It can realize to simulate actual production line, and has a certain development prospects for real-time detections of product quality.

Feature Size Measurement of Multihole Sheet Metal Part Based on HALCON

To realize the target of having a precise feature size measurement of multihole sheet metal part, this paper based on HALCON, first calibrates the camera with HALCONs calibration assistant. After acquiring the image of the multihole sheet metal part, the image coordinates of the center of fitting ellipse and the length of the long and short half shaft (pixel unit) can be gotten by proceeding a series of operations like thresholding, subpixel-precise contour extraction, fitting ellipses and so on. At last, the point coordinates in image are transformed into the plane Z=0 of the world coordinate system through translation and rotation, and the value of each feature size of the sheet metal part can be calculated.

The Research of Reverse Engineering Based on Geomagic Studio

The reverse engineering takes the products as prototype, through improving the CAD models to get new products models, which achieves the original design of product. The reverse engineering provides a convenient and fast tool for improvement design of the products,which is very important for shortening the development cycle and improving enterprise competitiveness. Therefore, it is necessary to research the reverse engineering. In this paper, the three-dimensional data scanner is used to measure the point cloud data of physical sample, by means of reverse engineering software Geomagic Studio to achieve the reverse modeling of parts and error detection analysis of digital model.

Traction Motor Base Multi-Condition Finite Element Strength Analysis

Motor base is an important component of the traction motor, it is not only the base to install other components of the motor , but also the magnetizer that contact different magnetic poles. In order to ensure its operation performance, the motor base need good rigidity performance. This paper utilizes the finite element technique, analyzing the frame in the strength under four different conditions. The results show that, in the utmost stress condition, the stress is lower than the allowable value, and the frame has a certain degree of safety, the structural parameter of the base meets the requirement of material strength.