Modern automatic assembly puts forward higher requirements for the stability and accuracy of material conveying. In order to meet industrial needs, a piezoelectric vibration that uses a rectangular piezoelectric vibrator as an excitation source and works in a vertical drive mode was designed. Feeder. By simplifying the double⁃cantilever piezoelectric vibrating feeder and establishing its dynamic model, the expressions of natural frequency and device amplitude were derived, and some factors affecting natural frequency and amplitude were analyzed. Use ANSYS Workbench software to analyze the dynamics of the device. The natural frequency of the system was 118.85 Hz, and the harmonic response analysis of the device was performed. The results show that when the driving voltage is 200 V, the system driving frequency is between 116.00～122.00 Hz, and the double cantilever piezoelectric vibration gives The feeder has the ability to transport materials, the vibration amplitude is the largest at the point closest to the resonance point (118.00 Hz), and the transport efficiency is the highest, which can meet the requirements of industrial production.

The damping vibration performance of the blade after metallization of steam turbine blades is studied. The turbine impeller was simplified and then modeled by ug software, and the modal analysis is carried out on the integral blade disk of the same thickness of the aluminum, titanium, aluminum titanium film blade and the uncoated blade by ANSYS software. The vibration pattern and natural vibration frequency are obtained, and the vulnerable parts of the impeller are observed as a whole；Harmonic response analysis of a single blade,The deformation of the four blades under the same load was further analyzed, and their damping effects were discussed.Combined with the experimental results, the test specimens were subjected to aluminum plating, titanium plating, aluminum plating first and then titanium plating treatment, and uncoated specimens formed a control group.Testing the damping performance of coatings with a Dynamic Mechanical Thermal Analyzer (DMA).The results show that the deformation of each step mode of the blade after coating is smaller than that of the blade without coating，it can play a certain damping effect on the blade coating.

The expansion dryer is the critical equipment for the finishing unit of rubber plant.It can remove 90% moisture from the rubber melt. Based on FLUENT software, the flow of rubber melt in the runner of expansion dryer was numerically analyzed. Under different production conditions, such as pressure difference between inlet and outlet, screw speed and so on, the flow law of rubber melt in the runner of expansion dryer was analyzed according to the velocity and pressure distribution nephograms, so as to improve the quality of rubber.

Based on the inverse kinematics solution of 6⁃PTRT parallel robot, the constraints on the workspace are analyzed. The three⁃dimensional boundary search method is used to search the workspace in space, and then the simulation is carried out by MATLAB software programming. The shape and distribution characteristics of the workspace are visualized. The workspace volume is solved by polar coordinate search method. The correlation between the structure parameter and the workspace is analyzed by using the control variable method,and the specific effect of the structural parameter on the workspace distribution and volume is clarified. This has important guiding significance for the structural design and practical application of 6⁃PTRT parallel robot.

The expansion dryer was the critical equipment for the finishing unit of rubber plant. It could take off 90% moisture in the rubber melt. The flow behavior of rubber melts in the channel of the expansion dryer was analyzed by FLUENT. Observing the nephogram of the distribution of rubber melts speeds and stress nephogram, the flow rule of rubber melts in the expansion dryer was analyzed. The following research directions were indicated.

GH4169 Nickel-based superalloys widely used, but it was difficult to cut.The residual stress of the machined surface could easily lead to the deformation of the workpiece, thereby the machining quality of the workpiece was affected.The variation of residual stress under different cutting parameters was studied by the simulation software Deform-3D. Simulation results showed that the change of cutting speed had little influence on the surface residual stress, the surface residual stress was increased with the increase of the cutting depth and the feed rate. The residual stress in workpiece was increased with the increased cutting parameters.

Rigid body displacement method is one of the important methods of compliant mechanism design. Based on rigid body displacement method, choosing the proper space configuration, using the proper flexible joint to replace the rigid motion, then a compliant parallel mechanism micro platform was designed with three degrees of freedom by calculating the freedom of spatial parallel mechanisms based on Kutzbach Grubler theory. The displacement data of moving platform output node was obtained and the movement precision of the parallel mechanism with three degrees of freedom was validated to meet the design requirements by using the ANSYS Workbench through analyzing the stress and diaplacement of flexible side chain and micro platform. The parameters obtained from the analysis could provide a reference for the optimization of the compliant parallel mechanism with multiple degrees of freedom, and it also provided reference for the design of parallel mechanism with multiple degrees of freedom.

 

To improve the accuracy of the trajectory tracking of hydraulic excavator working device, Lagrange dynamics model of hydraulic excavator working device was established.Because the hydraulic excavator working device had highly nonlinear, time lay, parameter uncertainty, sliding mode algorithm based on the low pass filter was proposed.The simulation results showed that the sliding mode control method was based on the low pass filter, which effectively eliminate chattering phenomenon, and improved the fast tracking performance and dynamic response performance of the system, and had a stronger robustness to parameter uncertainties.

Through the improvement of small excavator hydraulic system, by using AMESim software and establishing a simulation model of excavator boom hydraulic system, the influence of PID controller parameters on the system dynamic performance was analyzed. At the same time, its dynamic performance was simulated and analyzed. The results show that the global optimal solution of PID parameters improves the performance of excavator boom hydraulic system and obtains good effect, which offers references for the frequency response speed and stability of the system.

Based on the theory of normalization of stiffness matrix, a linear flexible platform was established. Through the stiffness matrix of flexible platform normalization process, its flexibility matrix organization was gotten, and then judged the degree of freedom and constraints of the design agencies. Then through analyzing the finite element simulation for the designed flexible platform, the results showed that the results of the finite element analysis was consistent with the calculated theoretical. This could become the reference for the design and analysis of multiple degrees of freedom linear flexible mechanism.

In the titanium alloy cutting operations with carbide tools, tool wear is one of the main restrictive factors on its tool life, and the cutting temperature significantly affects the tool wear, and closely related to work piece surface integrity and machining precision. Therefore, the analysis of temperature changes of cutting temperature and the tool wear are helpful to increase the productivity and lower down the costs of production. In this paper, the finite element software Deform3D was used to make simulation analysis on cutting temperature field and tool wear during the process of titanium alloy cutting operations with carbide tools. Accoordingly, the influence of the cutting speed, feed and cutting depth, and the dynamic changes of the rake angle of the tool on cutting temperature was achieved, and the change law of tool wear condition with cutting temperature. The findings of this research are helpful to optimize the cutting parameters and research the mechanism of tool wear.

Hydraulic manifold block is an important component of the hydraulic system. When drilling and milling machine was at work,hydraulic manifold block calorific value was large and temperature rise was huge so as to cause the hydraulic system great energy loss. And the numerical simulation was used for hydraulic manifold block internal pore by applying for ANSYS software FLOTRAN CFD module. The results showed the relationship between the internal pore structure parameters and partial pressure loss. While hydraulic manifold block internal channels were as the objective of study, the regime of flow inside pore was simulated and the partial pressure great loss of manifold blocks for structural optimization was analyzed. The results show that reasonable pore structure could reduce the hydraulic system pressure loss to improve the hydraulic system efficiency.

Using the threedimensional software ANSYS WorkBench for nonbeam pumping unit for dynamic analysis, the threedimensional finite element model of the pumping unit rack was established. To ensure that the system could be fully reflected in the dynamic analysis of the characteristics of its own force , firstly , the software prestress modal frame was used to analysis the pumping units static characteristic, and then the module was used on the rack's modal analysis, the rack's front nine natural frequencies and mode shapes were obtained. The results showed the Prestress had a little influence to the intrinsic characteristics of rack, and it could be neglected, and the rack structure affected the overall stability of the rack|through the analysis, changing the form and structure of the rack scantlings could improve the system's stability. Thereby the life of the rack was enhanced.

Took the boom of small hydraulic excavator working device as the research object, finite element analysis model was done. Pro/E 3D software was used to build the threedimensional model of the boom of the excavator working device, then imported into ANSYS software through seamless interface software Pro/E and ANSYS software. In addition, ANSYS was used to carry out the static and modal analysis of the boom, and corresponding stress contours, displacement contours, modal frequencies and vibration modes were obtained, which offered theoretical references for the structure optimization design.

Through 3d ANSYS software, the belt pumping unit 3d model was established, the belt pumping unit structure was analyzed. Got the support maximum stress and displacement distribution maps, got some conclusion by analyzing the results. Based on this for the pumping unit for structure optimization design, three kinds of improved models was put forward, though the three kinds of models analysis, got the three models of the displacement and stress distribution maps. The results show that even the oil pumping unit design meet the requirements, it also can proceed the further optimization, changing the stress smaller angle stress model and raking prop, strengthen the main force position, not only greatly improve the stress state, but also make the structure more reasonable, economy applicable. 

Milling head is the important actuator of divided milling machine. The strength value of milling machine has big affection in reliability when it working. Thus, the static and modal analysis used finite element software ANSYS has important meanings. The geometric model of milling head was builded by 3D software Pro/E and tested the interference of the model. The finite element was constructed through the connector of Pro/E and ANSYS and made modal and static analysis through ANSYS. The results of dynamic simulation show that there is no interference produced. The results of modal analysis show that there is no resonance phenomenon produced. At the same time, the results of static analysis show that the stiffness and strength is satisfied. Theoretically, the results of software provide references for the structure and optimizing design of the machine.