Chinese Journal of Mechanical Engineering
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Influence of Non-uniform Parameter of Bolt Joint on Complexity of Frequency Characteristics of Cylindrical Shell
Chinese Journal of Mechanical Engineering - Tập 36 - Trang 1-14 - 2023
Bolt connection is one of the main fixing methods of cylindrical shell structures. A typical bolted connection model is considered as a tuned system. However, in the actual working conditions, due to the manufacturing error, installation error and uneven materials of bolts, there are always random errors between different bolts. To investigate the influence of non-uniform parameters of bolt joint,...... hiện toàn bộ
Design of Passive Constant-Force End-Effector for Robotic Polishing of Optical Reflective MirrorsAbstract Polishing plays an indispensable role in optical processing, especially for large-aperture optical reflective mirrors with freeform surfaces. Robotic polishing requires effective control of the contact force between the robot and the mirror during processing. In order to maintain a constant contact force during polishing, traditional polishing robots rely o... ... hiện toàn bộ
Chinese Journal of Mechanical Engineering - Tập 35 Số 1 - 2022
Modeling and compensation technology for the comprehensive errors of fixture system
Chinese Journal of Mechanical Engineering - - 2012
Electrochemical machining analysis on grid cathode composed of square cells
Chinese Journal of Mechanical Engineering - Tập 26 Số 4 - Trang 668-674 - 2013
During the electrochemical machining (ECM), the cathodes designed by the existing methods are mainly unitary cathodes, which can be only used to produce the workpieces with the same shapes. However, there are few researches on designing cathodes for machining the different workpieces with the different surfaces. This paper presents the grid cathode composed of the square cells to produce the workp...... hiện toàn bộ
Nanometric Cutting Mechanism of Cerium–Lanthanum Alloy
Chinese Journal of Mechanical Engineering - Tập 36 - Trang 1-12 - 2023
Cerium–lanthanum alloy is widely used in the green energy industry, and the nanoscale smooth surface of this material is in demand. Nanometric cutting is an effective approach to achieving the ultra-precision machining surface. Molecular dynamics (MD) simulation is usually used to reveal the atomic-scale details of the material removal mechanism in nanometric cutting. In this study, the effects of...... hiện toàn bộ
Comparison of Modified Mohr–Coulomb Model and Bai–Wierzbicki Model for Constructing 3D Ductile Fracture Envelope of AA6063
Chinese Journal of Mechanical Engineering - Tập 34 - Trang 1-13 - 2021
Ductile fracture of metal often occurs in the plastic forming process of parts. The establishment of ductile fracture criterion can effectively guide the selection of process parameters and avoid ductile fracture of parts during machining. The 3D ductile fracture envelope of AA6063-T6 was developed to predict and prevent its fracture. Smooth round bar tension tests were performed to characterize t...... hiện toàn bộ
Design and Dynamic Analysis of the Recirculating Planetary Roller Screw Mechanism
Chinese Journal of Mechanical Engineering - Tập 35 - Trang 1-16 - 2022
The recirculating planetary roller screw mechanism (RPRSM) is a transmission mechanism that engages the screw and nut threaded by multiple grooved rollers. In this paper, firstly, the design method of RPRSM nut threadless area is proposed, and the equations related to the structural parameters of nut threadless area are derived. On this basis, the cross-section design method of roller, screw and n...... hiện toàn bộ
Study on the Distribution of Frictional Forces on Z-yarn Continuous Implanted Preforms and Their Applications
Chinese Journal of Mechanical Engineering - Tập 35 - Trang 1-14 - 2022
To improve the quality and efficiency of Z-directional 3D preform forming, the Z-yarn frictional force distribution model of the preform and its wear mechanism were investigated. In this study, a tensile force measuring device was designed to measure the force required to replace the guide sleeve, which is equivalent to the Z-yarn frictional forces. The frictional force is proportional to the numb...... hiện toàn bộ
Reliability Assessment for the Solenoid Valve of a High-Speed Train Braking System under Small Sample Size
Chinese Journal of Mechanical Engineering - Tập 31 - Trang 1-11 - 2018
Reliability assessment of the braking system in a high-speed train under small sample size and zero-failure data is very important for safe operation. Traditional reliability assessment methods are only performed well under conditions of large sample size and complete failure data, which lead to large deviation under conditions of small sample size and zero-failure data. To improve this problem, a...... hiện toàn bộ
An Error Equivalent Model of Revolute Joints with Clearances for Antenna Pointing Mechanisms
Chinese Journal of Mechanical Engineering - Tập 31 - Trang 1-9 - 2018
Joint clearances in antenna pointing mechanisms lead to uncertainty in function deviation. Current studies mainly focus on radial clearance of revolute joints, while axial clearance has rarely been taken into consideration. In fact, owning to errors from machining and assembly, thermal deformation and so forth, practically, axial clearance is inevitable in the joint. In this study, an error equiva...... hiện toàn bộ
Tổng số: 1,068
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