UG Software Research Articles

Research on Stiffness Analysis and Technology of the Heavy Spidle Top

Background: The spindle top is an important component used to withstand the shaft workpiece on machine tools so that the spindle can meet high efficiency and high precision requirements. However, the selection principles under various load conditions are not stipulated in use. In addition, material selection, manufacturing, heat treatment technology, etc., are of practical significance for the production of high hardness, high wear resistance, and high precision spindle tops. Objectives: The spindle top type, material selection principles, heat treatment, cold working, and other manufacturing processes are given. Provide a reference for highperformance and top-notch design and manufacturing. Methods: The model of the spindle top will be created in UG software, then using ANSYS finite element analysis software to analyze stiffness of spindle top whose height-to-diameter ratios are 1:4 and 1:7 types in a variety of different load cases. The design and manufacturing process of the spindle top is analyzed and expounded from the selection and performance comparison of metal materials, heat treatment of different materials, cold manufacturing technology, and other aspects. Results: The deformation laws of different types of spindle tops are obtained. According to the deformation regular, find the selection principle of height to diameter ratio of spindle top. The defects that are easy to occur in the technology are obtained and the preventive and solution measures are put forward. Conclusion: According to the deformation regular, find the selection principle of height to diameter ratio of spindle top. The material selection, heat treatment technology, and other technical research on the spindle top provide the necessary basis for the production of the spindle top.

Design and Simulation of Exoskeleton Robot

Based on the research of lower limb exoskeleton robots and extensive literature review, combined with human anatomy and kinematics, a four-degree-of-freedom lower limb exoskeleton robot was designed, and its three-dimensional model was established using UG software. In the design of the exoskeleton robot, it is required to have a simple structure, zero sensitivity in response speed, and be easy to realize automatic control. The exoskeleton robot designed in this paper uses electric push rods as the driving elements, and the dimensions of each part of the robot are obtained from the national standard human body size table; based on the analysis of the human gait cycle, and using cubic polynomial interpolation to plan the spatial posture of each joint; Adams was used to simulate the movement of the exoskeleton robot, and the motion curves of each joint were obtained.

Research on the effect of various tongue types on large volute pumps

In order to analyze the effect of different tongue type on large volute pump, this paper takes a large volute pump as the research object, and analyzes the calculation results of three different types of volute models. The commercial modeling software UG is used to construct the small tongue angle, partitioned and large tongue angle volute based on the volute of the model pump. The ANSYS CFX is used to complete the numerical calculations. Comparative analysis of the hydraulic performance and pressure pulsation near the tongue of the three large volute pumps with different types of volutes are carried out. The results show that the efficiency of the partitioned volute plan decreases significantly under the over-load condition, and the pressure pulsation near the tongue is melted under the design condition. The small tongue angle plan is more suitable for large volute pumps.

Design of a New Glass Cleaning Robot

Improve the various abilities of glass cleaning robots, such as climbing ability and obstacle crossing ability at any angle, change the traditional movement mode of robots, and enable them to perform obstacle free movement in three-dimensional space. Taking inspiration from the quadruped movement of geckos, the UG software in mechanical CAD/CAM is used to simulate the structure of a glass cleaning robot for gait planning and structural design. By studying the force situation, the dimensions of the four bar mechanism and the size of the suction cup of the vacuum suction cup quadruped glass cleaning robot were derived. The structural design diagram was drawn, and its operating trajectory and mode were explained. Create post-processing through Postbuilder, conduct comprehensive testing and simulation to ensure accuracy before processing its components. The calculation shows that the thigh step distance within one cycle is 89.83 mm, and the calf step distance is 3.11 mm. So, the total step distance of a single leg in one cycle is 92.94 mm. Based on this, a top-down modeling approach was adopted, and assembly methods, connection methods, and driving methods were set in the simulation. The cosine function was used to control the motion trajectory of the legs. This design effectively simulates the motion of geckos. In future research, we will continue to focus on the dynamic trajectory of the robot's tail, in order to enable the robot to adjust its posture through its tail under microgravity and make the motion of the gecko like robot more flexible.

Design of Injection Mould for Lithium Battery Heat Dissipation Device Connector Bottom Cover

The design process of the injection mould for the Lithium battery heat dissipation device connector bottom cover is described in detail. In the design process, the UG software is used to establish the three-dimensional model of the plastic part, and the mould flow analysis is carried out with the help of the moldflow software to determine the optimal gate position of the plastic part. By determining the injection process parameters of Lithium battery heat dissipation device connector bottom cover material, the design of the cavity layout of the plastic part is completed, and the basic size and mould structure of the mould base are determined. Then, the UG injection mould design guide module was used to carry out the parting design, and the structural design of the mould’s gating system, molding parts, lateral parting mechanism, core-pulling mechanism, ejection mechanism, exhaust system and cooling system was completed in turn. The whole design process improved the efficiency of mould design and saved a lot of time and cost.

Design of Heat Pipe Air Preheater for 10 t/h Gas-Steam Boiler

This design is aimed at energy -saving and designed a heat pipe air preheat to recover 10T/H steam gas boiler flue heat waste heat, thereby increasing the efficiency of the boiler and reducing gas consumption. This article first introduces the thermal pipe, heat pipe heat exchange, and boiler thermal system, and then focus on the design and optimization of the heat pipe air heater. This design optimizes the thermal pipe specifications of the heat pipe air heater and the parameters of the fins. At the same time, the sealing structure, the fixed structure, and the airport structure are optimized. Subsequently, the UG software created a three -dimensional physical model model and rendering model, and finally proposed corresponding countermeasures on equipment corrosion, thermal pipe life and tube vibration problems. This design uses Excel software to make design calculation tables. Through input parameters, the results of the results of the number of thermal pipes can be obtained.

Impeller Machining Technology Research based on CAXA

The impeller is a kind of contain complex surface more difficult machining parts, often through the UG, Pro/E and CAM software production parts processing program. In this paper, ME2020 domestic CAXA software as a platform, the impeller machining method.In order to improve the machining efficiency of the impeller, and gives the VERICUT software optimization program method.

Optimization Design of Pot Slot Structure of Tea De-enzyming and Carding Machine

The problems of the uneven strip shape and low efficiency of tea de-enzyming and carding machines in the working process were addressed by analyzing the trajectory of tea particles and establishing a force model diagram of tea particles in the pot slot. The three-dimensional geometric model of the tea de-enzyming and carding machine was drawn using UG software, and the simulation model of tea particles was established using EDEM software. The work efficiency of the tea de-enzyming and carding machine was improved, and the rate of broken tea was reduced using the EDEM software to simulate the movement of tea particles in the pot slot under different heights of the convex bar, pot slot angle of inclination, and number of slots. The average velocity and interaction force curve of tea particles were obtained. The influence of the number of slots, the inclination angle of the slot, and the height of the convex bar on the effect of tea into strips were verified using a scheme design based on the quadratic regression orthogonal combination rotation test, and experimental research based on three factors and three levels was carried out. Design-Expert 11 software (Stat-Ease, Minneapolis, MN, USA) was used to optimize the response surface and analyze the regression model of the relevant test data. The 6CSL-800 tea de-enzyming (Anji Yuanfeng Tea Machinery Co., Ltd., Huzhou, China) and carding machine (Anji Yuanfeng Tea Machinery Co., Ltd., Huzhou, China) was used as the verification test prototype, six sets of verification tests were carried out, and the test results showed that the maximum value of the strip rate index and the minimum value of the broken tea rate index were obtained. The order of the indicators affecting the bar-type rate and broken tea rate of the de-enzyming and carding machine from high to low is as follows: the height of the convex bar, the inclination angle of the slot body, and the number of slots bodies. When the height of the convex bar was 10 mm, the inclination angle of the slot was 90°, the number of slots was 12, the bar-type rate was 89.45%, and the broken tea rate was 1.63%. The prediction results of the regression model of the bar-type rate and broken tea rate of the tea de-enzyming and carding machine were verified by employing six sets of control tests with the 6CSL-800 tea de-enzyming and carding machine as the validation test prototype. The actual values of the bar-type rate obtained from the six sets of control tests were 88.19%, 90.37%, and 87.33% (1,2,3 group), and the actual values of the broken tea rate were 1.66%, 1.69%, and 1.61% (4,5,6 group), with average values of 88.63% and 1.65%. The control test was basically consistent with the results of parameter optimization. The processed finished tea has good quality, which can provide theoretical reference for the optimization and design of tea de-enzyming and carding machines and similar tea machines in the future.

Modal Research of a Certain Type of Gas Turbine Rotor

At present, one of the bottlenecks that currently restrict the reliability and lifetime of the whole machine is the rotor-bearing system of gas turbines. This paper firstly introduces the background of gas turbines and the current research situation, and then carries out 3D modelling using UG (Unigraphics NX) software according to the available 2D drawings of the original rotor and relevant parameters. In view of the complex structure of the original rotor and the technical problems in the actual installation process, the original bearing-rotor system was modified and modelled in 3D as well, followed by modal analysis and Campbell diagrams based on Ansys Workbench software. Finally, the simulation results were compared with the theoretical results to verify the feasibility of the scheme and to provide theoretical support for the subsequent 1:1 gas turbine rotor-bearing performance test-bed for the comprehensive performance experimental study of the research and development of gas turbine bearings.

Vaginal delivery effects on 3D morphology of the bladder, urethra, and vagina: a pilot study comparing women with different numbers of deliveries.

To explore 3D morphological changes of the bladder, urethra, and vagina following different numbers of vaginal deliveries. Sampled patients had undergone magnetic resonance imaging for gynecological diseases in Nanfang Hospital. A total of 167 patients who met the study inclusion and exclusion criteria were enrolled and divided into four groups. Mimics and UG software packages were used for reconstructions and measurements, and data were compared with one-way analyses of variance. A total of 167 3D models were constructed, and eight parameters related to the bladder and urethra were measured (5 angles, 2 lengths, and 1 thickness). No statistically significant differences were found between subgroups, although mean plot figures of urethra pubic and α angles showed trends to increase with more deliveries, and the opposite trend was seen for the urethra tilt angle. There were no obvious trends between other parameters and delivery number. There were seven vaginal parameters (6 lengths and 1 shape). Mid-urethral and vaginal gap measurements tended to become wider as delivery number increased, and the opposite was seen for the distal gap. Mid-vaginal 2D cross-sectional shape and the proportion of shallow concave types also tended to significantly increase with more deliveries, especially after the third birth. As the number of deliveries through the vagina increases, the lateral support function of this organ and the urethra become relatively weaker. These fine anatomical changes are related to delivery numbers and become most obvious after the third birth.

Research on the Injection Mold Design and Molding Process Parameter Optimization of a Car Door Inner Panel

Numerical simulation of the injection molding of the inner panel of the car door and the optimization of its process parameters were completed. The inner panel and its injection mold were designed by UG software and simulated by the filling and cooling module of the Moldflow software. Different gate schemes were selected to compare quality indicators such as filling time, air pockets, and weld lines to obtain the optimal number of gates. We established the objective function model with gate position as the independent variable, and used a multi-population genetic algorithm to solve the optimal position of the function model to get the best gate position. The mold temperature, melt temperature, cooling time, holding pressure, and holding time were selected as the influencing factors, and volume shrinkage and warpage deformation were selected as the evaluation indicators to design and complete the orthogonal test. The test data were simulated by Moldflow, and the optimal combination of process parameters was determined by range and variance analysis. The BP neural network model related to the molding process parameters, volume shrinkage, and warpage deformation was built, and the trained network model was optimized with the ant colony algorithm. The optimal parameter combination was: mold temperature 76 ° C , melt temperature 205 ° C , cooling time 23.8s, holding pressure 54.7Mpa, and holding time 22.1s. The simulation results showed that volume shrinkage was 13.32% and warpage deformation was 4.315 mm. The design of an injection mold for the car door inner panel was completed and its molding process parameters were optimized.

A complex machinery design-oriented digital prototype model driven method

Because of information loss during the conversion between a geometric digital prototype and a performance digital prototype in developing a complex mechanical product, the model-driven architecture of a digital prototype was constructed. By analyzing the constituent elements of a STEP file, the platform independent model based on the digital prototype was established. The platform specific model conversion method from the model-driven platform independent model to the UG software, the Adams software and the Abaqus software was proposed. Based on the heterogeneous software interface and the scripting language, the model-driven modules of the above three types of software were developed and verified with numerical instances. The verification results show that the use of the model-driven method can share the model information on the special software for a mechanical digital prototype and that the model-driven modules thus developed can perform the quick simulation analysis and output its results in time.

UG-based research on unfolding of bent sheet metal parts

In the process of sheet metal bending, there is a large deviation between the value of sheet metal unfolding calculation by UG software and actual processing. In order to solve this problem, the method of unfolding calculation by UG software is analyzed and compared with the traditional calculation by manual compensation. The relationship between the neutral factor value K in unfolding calculation by UG software and the compensation factor value B in calculation by manual compensation is obtained through formula derivation. Thus, the purpose of automatic unfolding calculation by UG software instead of manual compensation calculation is realized.

CFD analysis of flow field and hydrodynamic compensation of poppet valve

The steady-state hydrodynamic force of cartridge valve poppet valve core reduces the stability of cartridge valve. A circular arc structure is added to the main valve core of the poppet valve to compensate the steady-state flow force. Referring to the structure and parameters of the actual cartridge poppet valve, the three-dimensional geometric model of the flow channel in the valve is established with UG software. CFD method is used to calculate and analyze the flow state of fluid in the poppet valve under the working state of the valve core, and the influence of the arc size and position of the valve core on the steady-state hydrodynamic compensation of the main valve core is studied. The results show that the circular arc structure can realize the hydrodynamic compensation of the valve core and increase the stability of the valve core. When the opening amount is small, properly increasing the height h of the circular arc structure can increase the static hydrodynamic compensation of the valve core; Keep the circular arc structure size L less than 1mm, and the static hydrodynamic compensation effect of the valve core is better.

Research on the Influence of the Pitch of the Spiral Toolpath on the Forming Quality of Single Point Increment Forming

In order to study the influence of the pitch of the spiral toolpath on the forming quality in the single-point incremental forming, three kinds of spiral toolpath with pitch of 0.2 mm, 0.5 mm and 1 mm were generated by using the UG software, and the thickness distribution, contour dimensional accuracy and equivalent stress of the formed parts based on the spiral toolpath with the three kinds of pitch were compared and analyzed through numerical simulation by using the ANSYS/LS-DYNA software. The research result show that the smaller the pitch of the spiral toolpath, the better the forming quality of the formed part.

Forming Analysis and Die Design of the Connecting Plate of Automobile Door Inner Panel

Door inner plate connecting plate is the key part of automobile door assembly, and deformation is highly nonlinear. The stamping process of the connecting plate was analyzed and the forming process design was determined. The drawing forming of the parts is analyzed, and the FLD diagram and the thinning rate cloud diagram of the connecting plate are obtained. According to the result of cloud image, the drawing forming process of parts is analyzed, and the stamping defects such as wrinkle and crack in the drawing forming process of connecting plate are forecasted. It is concluded that the drawing forming process of parts is good as a whole, the local thinning of parts is more than 25% seriously, and the cracking trend is improved by increasing the radius of fillet. UG and CAD software were used to design a complete set of drawing die and pressure test, and reliable drawing parts were obtained. The reliability of stamping analysis and die design was verified.

Die Casting Die Design and Process Optimization of Aluminum Alloy Gearbox Shell.

Taking an aluminum alloy gearbox of an automobile as an example, according to its structural characteristics, the parting surface was determined, and the initial gating system was designed by using 3D modeling software UG. Based on Magmasoft software, the numerical simulation of the filling and solidification process was carried out to determine the best gating system scheme. The cooling system and core pulling structure were designed, and the parameter design process of the aluminum alloy gearbox shell in the die-casting process was introduced. Aiming at the leakage problem of the gearbox shell in the bench and road test after assembly, the cause was found through numerical simulation and industrial CT analysis, and the problem was solved by adding high-pressure point cooling at the corresponding position of the leakage, and the correctness of the optimization was verified. It provides an effective method for the die-casting production of the transmission housing and the analysis and solution of product defects, which improves the product quality and shortens the production cycle.

Thermal-mechanical Coupling Analysis of Rear Wheel Brake of Sightseeing Vehicle Based on Workbench

Taking the rear wheel brake of a certain brand of sightseeing vehicle as an example, floating caliper disc brakes and leading trailing shoe brake were simulated and compared for determining rear wheel brake types. The simplified model is established by UG software, imported into Workbench for thermal-mechanical coupling analysis under 10 braking conditions. The results show that the two brakes can meet the requirements of the vehicle, the former has better performance, and the latter has lower cost.

Analysis of vehicle ride comfort applying a 2SPS+SR parallel seat mechanism

The violent vibration may cause discomfort to the driver and operation instability in different directions including fore-aft, lateral, and vertical when construction vehicles are driven or operated on off-roads. To improve ride comfort, a novel kind of 2SPS+SR parallel seat mechanism is proposed in this article. First, to verify the motion state of one translation and two rotations, the model of this new seat mechanism was built and analyzed using UG software. Furthermore, the acceleration and power spectrum density between the conventional seat and the 2SPS+SR parallel seat were compared in three directions of vertical, pitching, and rolling when the vehicle was driven on different three-dimensional roads. Then, the comparisons of the weighted vibration level and the root mean square of the total weighted acceleration on different roads were illustrated to denote the ride comfort of the construction vehicle. The results show that this 2SPS+SR parallel seat mechanism could improve the ride comfort of construction vehicles. The results will provide theoretical support for further research on the control of vehicle vibration.

Energy Saving Strategy and Realization of Honda Eco-car body

How many miles can an eco-car run with 1 literature gasoline? The saving fuel requirement is presented by Honda Eco Mileage Challenge (HEMC) to the competing teams. In order to save fuel of eco-car during the race, each team adopts different methods and strategy. In this study, kinds of saving fuel methods of car body are put forward. According to automobile design theory, the car shell with low coefficient of aerodynamic drag and frontal area is designed and made. The frame model is built and simulation analysis with enough torsion rigidity, strength, and light weight is finished in the software UG and ANSYS. The material object of frame and car shell are made.