Papers by Author: Shu Lin Wang

Abstract: Ni60A coating is obtained by oxygen-acetylene spray welding and high-frequency induction remelting process. Coating Surface, interface between matrix and coating, microhardness and wear resistance are investigated. The results show that both of the processes can achieve coating metallurgically bonded to matrix. But microhardness and wear resistance of Ni60A coating obtained by high-frequency induction remelting process are superior to those of Ni60A coating obtained by oxygen-acetylene spray welding process. At the same time, coating surface by high-frequency induction remelting process is of more brightness owing to less oxide skin. In order to more effectively prevent the hard phase from oxidation, the quartz glass pipe and inert gas should be considered to use in high-frequency induction remelting process.

Abstract: The manufacture and assembly accuracy of the HSK taper inspection gauge directly influences the measurement precision. Take the large taper measuring head of the HSK-A63 taper inspection gauge as the research object, analyzed the measurement errors caused by its mounting position deviations, obtained corresponding formulas. Based on the structure of the inspection gauge and the moderate accuracy required by machinery manufacture and mechanical assembly, assigned value for each parameter, and the specific measurement errors were calculated. Guiding suggestions for the manufacture and assembly of the HSK taper inspection gauge were proposed.

Abstract: The hazards of HSK toolholders caused by unbalance vibration are described The vibration information can be more accurately extracted by choosing the appropriate method of measuring unbalance and using FFT transform to reconstruct wavelet signal. Finally, the HSK tool holders unbalance measurement software module diagram are shown. This way can be a good basis for scientific research and the development of the HSK integrated measurement system.

Abstract: Toolholder radial rigidity plays an important role in tool vibration and the quality of machine face. Toolhoder radial rigidity is investigated by the finite element method. The factors such as the fitness between tool and toolhoder, the length of oil chamber bulge, oil pressure and rotation speeds are analyzed in the paper, the results can offer some effectively guidelines and reference for toolhoder machining and processing quality control.

Abstract: According to the principle of induction heating, the skin depth of shrink-fit chuck is determined and the mathematical model of induction heating is constructed. Then a finite element model of induction heating for shrink-fit chuck based on FEM software is set up and the electromagnetic field, temperature field and structure field are obtained. In the end, the paper discusses the influence of the position, current frequency and current density of the coil on the deflection of the clamping bore. Research work provides a theory reference for the design of shrink-fit tool holder and shrink-fit machine.

Abstract: Based on finite element analysis, the static transmitted torque of Hydraulic Expansion Toolholder is validated. When Hydraulic Expansion Toolholder is on the static state, the article does the analysis of the contact region deformation and contact stress under different structure sizes. The calculation and the analysis results can provide theoretical guidance for Toolholder application and structure design.

Abstract: Considering the difficulty in identifying the tool system in the process of tool management, this paper proposes a design of toolholder identification system which is capable of storing all tool date using commercially available radio frequency identification (RFID) tags. The system is composed of radio frequency electronic tags, ultra high frequency reader and computer identification system. The paper gives the hardware and software design of toolholder identification system.

Abstract: In this research, a linear-elastic FEM (finite element method) model of tooling system under the unconstrained condition was established for a BT40 tooling system. The natural frequency and the modal shape of the tooling system computed from the FEM analysis were verified against the structural modal parameters obtained from experimental modal analysis. In the basis of rational FEM model of tooling system, the changing law its length and diameter influence to structural modal parameters was investigated. After that, with the machine vibration testing of spindle raising speed idle running, further study on the law about the changing length and diameter of tooling system influence to vibration characteristic of spindle-tool system, the researched results will be a theoretical basis to evaluate the dynamic performance of other type’s tooling system.

Abstract: On the basis of finite element analysis, the static transmitted torque of Hydraulic Expansion Toolholder is validated. At the same time fluid analysis software is used to investigate the oil pressure changes in oil chamber wall because of different rotation speed. Then through the fluid-solid coupling, the article analyzes the chuck clamping performance on the factors of expansion chuck and tool clearance, rotation speed, and hydraulic oil pressure when toolholder on the state of high rotation speed.

Abstract: In this study, an integrated methodology combining computational modal analysis, experimental modal analysis, and computational dynamic analysis was developed to investigate unbalancing dynamic responses of high speed machining tool systems. A linear-elasticity formulation based on the finite element method (FEM) was employed to compute the natural frequencies and obtain the corresponding modal shapes. Experimental modal analysis was then performed to verify the natural frequencies. After the validation, the FEM model was further modified to predict the dynamic responses, with an HSK (a Germany abbreviation of Hohl Schaft Kegel) tool system as a model system. The results indicated that, by validating the computed natural frequencies with experimental ones, an effective simulation model can be established for predicting complex dynamic response of high speed machining tool systems.