最新刊期
期 5 ， 2022
- 摘要：Tooth root fatigue crack is one of the most common failure forms in the service process of gear transmission system， and it will threaten the safety of gear transmission systems or even the whole equipment. It is of great significance to carry out the fault diagnosis of the gear tooth in gear transmissions， where the dynamic action mechanism and vibration feature of the tooth root crack fault are the core. However， the influence of tooth root rack on tooth coupling has not be considered in the traditional calculation model of gear mesh stiffness. With respect to this problem， a finite element model of a spur gear is established to analyze the coupling mechanism between the adjacent teeth caused by the structural deformation of the gear body. And the effect of the force， the hub hole radius and the depth of tooth root crack on gear body stiffness are investigated， especially for the coupling stiffness between the adjacent teeth. The results show that the tooth root crack has a significant effect on both the gear body stiffness and the coupling stiffness between the adjacent teeth， which should be considered in the excitation calculation of the time-varying mesh stiffness with the presence of tooth root crack， so as to improve the accuracy of gear excitation model with tooth root crack.关键词：Tooth root crack;Gear body structure deformation;Gear fbody stiffness;Mesh stiffness;Finite element method
- 3
- |
- 4
- |
- 0
发布时间：2022-09-24 - 摘要：In order to analyze the nonlinear amplitude frequency characteristics of marine herringbone gear transmission system more accurately， the factors such as tooth surface friction， time-varying meshing stiffness， backlash， comprehensive transmission error， external load excitation， intermediate shaft section and elastic support are comprehensively considered， a bending torsional axial pendular nonlinear dynamics model of 24-DOF marine herringbone gear transmission system is established based on the lumped mass parameter method， and the nonlinear dynamic differential equations of the system are derived. In the model， the friction coefficient， friction force and friction moment are calculated by using the elastohydrodynamic lubrication theory. The Runge-Kutta numerical method is used to solve the differential equation. The phase diagram and time history diagram of the non-dimensional frequency system under the influence of tooth surface friction are obtained. The influence of tooth surface friction on the nonlinear frequency response characteristics of the system is analyzed. The results show that the tooth surface friction suppresses the vibration of the herringbone gear pair along the meshing line， but does not change the meshing state of the gear; in different meshing frequency range， low frequency range of 0~0.89 and high frequency range of 1.42~2， the damping effect of tooth surface friction on vibration amplitude cannot be ignored. In the non-stationary resonance range of dimensionless meshing frequency of 0.95~1.23， the damping effect of tooth surface friction is not obvious. It provides a theoretical basis for the study of vibration and noise reduction performance of herringbone gears.关键词：Herringbone gear;Tooth surface friction;Nonlinear;Bending torsional axial pendular;Amplitude frequency
- 1
- |
- 3
- |
- 0
发布时间：2022-09-24 - 摘要：The saddle-shaped buckling deformation is the main thermal buckling deformation mode of the friction pairs in the hydro-viscous clutch. The equivalent model of contact deformation is established to obtain the contact and temperature field distribution characteristics of the deformed friction pairs， which are based on the hertz point contact theory of the ellipsoid and buckling deformation law. The distribution and variation of deformed friction pairs contact stress under the soft-start condition are obtained. A two-dimensional transient temperature field calculation model that considers the time-varying characteristics of the contact stress distribution and the convective heat transfer conditions are proposed， and the temperature rise in surface along with the temperature field of friction pairs in the sliding process is simulated and analyzed. The results show that in the process of soft-start， the friction pairs develop from the local contact to full contact. The contact area develops from the bending ellipse symmetrically distributed on both sides of the friction pair to full coverage and shows that the stress decreases from the contact center to the surrounding in an elliptical gradient. Under the influence of the contact stress， the temperature field of the sliding friction also decreases in an elliptical gradient from the high-temperature center to the surrounding. The difference in convective heat transfer conditions causes the high-temperature center to shift towards the outside of the sheet disk relative to the contact center， which increases the overall temperature of the outer diameter side. The results lay a theoretical ground for further research on the thermo mechanical coupling characteristics and the torque thermal instability of the hydro-viscous friction pairs.关键词：Hydro-viscous clutch;Friction pair;Saddle-shaped buckling deformation;Hertz contact;Temperature field
- 2
- |
- 3
- |
- 0
发布时间：2022-09-24 - 摘要：The redundancy feature of the parallel mechanism can increase the effective workspace，realize the fault-tolerant motion，which improves the performance of the parallel mechanism. Based on the 3-PRS parallel mechanism structure characteristic，starting from the configuration of a kinematic sub-branches，a redundant kinematic sub-branches is designed，and then a 3-PR（P）S redundant parallel mechanism is proposed. The degree of freedom of 3-PR（P）S redundant parallel mechanism is analyzed by using screw theory，a kinematic model is established，and the kinematic equation is derived. Aiming at the problems of rough boundary and low accuracy in solving the workspace of parallel mechanism by classical Monte Carlo method，a Monte Carlo method based on boundary extremum densification is proposed. The workspace of 3-PR（P）S redundant parallel mechanism is analyzed，and specific solving steps are given. Finally，the workspace of 3-PRS parallel mechanism and redundant parallel mechanism under different parameters are figured by Matlab programming and simulation. The results show that the workspace of the 3-PR（P）S redundant parallel mechanism is greatly improved compared with the 3-PRS parallel mechanism under the same parameters，which provides a theoretical basis for trajectory planning and fault-tolerant control.关键词：3-PRS parallel mechanism;Redundant structure design;Screw theory;Workspace
- 1
- |
- 4
- |
- 0
发布时间：2022-09-24 - 摘要：In order to improve the work efficiency of the manipulator while reducing the energy loss and impact， a trajectory optimization method based on the adaptive transformation bat algorithm （ATBA） is proposed. The trajectory model of the manipulator is established by using quintic polynomial interpolation; the ATBA is obtained by adding dynamic disturbance coefficients to the local search of the standard bat algorithm （BA）， and improving the conversion strategy of global search and local search at the same time. Optimize the motion trajectory of the manipulator with time， energy consumption and impact as the optimization goals. The simulation analysis of the six-degree-of-freedom manipulator shows that the trajectory optimization method can effectively perform multi-objective optimization and obtain the ideal Pareto optimal solution set. The normalized weight objective function is constructed through actual working conditions， and the desired solution can be selected by it. This optimization algorithm can improve the smoothness of trajectory， speed， acceleration and the operating efficiency of the manipulator better.关键词：Adaptive transformation bat algorithm;Multi-objective optimization;Quintic polynomial interpolation;Six-axis manipulator
- 1
- |
- 3
- |
- 0
发布时间：2022-09-24 - 摘要：Dynamics modeling and trajectory tracking control of a novel hybrid drive cable parallel manipulator （HDCPM） which has the advantages of both cable parallel mechanism and hybrid drive mechanism are investigated. A dynamics model for a HDCPM is established by using Lagrange method. For a HDCPM system with nonlinear， time-varying characteristics and repetitive time-varying disturbance， an adaptive iterative learning control strategy， which controls gain variations with the iterations， is designed. By means of Lyapunvo function， the stability of the controller is proved. The numerical simulation results indicate that an expect trajectory tracking of the HDCPM is achieved by the adaptive iterative learning controller， which illustrates the correctness of the built dynamic model and the validity of proposed control strategy.关键词：Hybrid drive cable parallel manipulator;Dynamic model;Trajectory tracking;Adaptive iterative learning control
- 2
- |
- 3
- |
- 0
发布时间：2022-09-24 - 摘要：The type synthesis problem of the spreading tray adjustment mechanism in the rice transplanting machine is analyzed， by the topological design theory and method of parallel mechanism based on Position and orientation characteristics set， 14 types of 3-degree-of-freedom 2T1R parallel mechanisms driven by moving pair are synthesized for the spreading tray adjustment mechanism. Considering the practical application requirements， a mechanism with strong practicality is selected， and the topological feature analysis and kinematic analysis are carried out for this mechanism， which lays the theoretical foundation for the subsequent specific structure design.关键词：Spreading tray adjustment mechanism;2T1R;Topological feature analysis;Kinematics analysis
- 1
- |
- 3
- |
- 0
发布时间：2022-09-24
Theory·Reserach
- 摘要：Proposes a new type of transmission device， the planetary roller and roller pinion transmission device， that combines planetary roller screw with trochoid roller rack. The device not only has advantages of planetary roller screw which are compact structure and large bearing capacity， but also has those of trochoid roller rack which are high precision and low noise. The transmission principle of the device is represented and the parameter matching design method of the transmission device is established. The parameter design and three-dimensional modeling of the transmission device are carried out according to the requirements of specific working conditions. The kinematic simulation of the planetary roller and roller pinion composite transmission device is completed by using Adams software. The result validates the basic transmission principle and design feasibility of the transmission device. The influence law of some basic design parameters on the motion characteristics are analyzed and summarized.关键词：Planetary roller screw;Trochoid roller rack;Planetary roller and roller pinion compound transmission device;Transmission principle;Parameter matching;Kinematics simulation
- 7
- |
- 8
- |
- 0
发布时间：2022-09-24 - 摘要：Since spatial multi-loop coupling mechanisms are more complicated than spatial parallel mechanisms， and the coupling members are more restrained by the side effects of motion between kinematic chains， a new method for calculating degrees of freedom （DOF） suitable for multi-loop coupling mechanisms is proposed. The idea is to firstly determine the coupling components in the mechanism， combine the constraint normal line distribution of the motion pairs， combine the constraints generated by the motion pairs between the various components in the mechanism， simplify into the distribution of normal lines on the constraint points， and then transform the degree of freedom analysis of the coupling mechanism into an analysis of the geometric relationship of the constraint normal lines of each coupling member. According to the established theory of determining the degrees of freedom of the constraint normal line geometric relationship， analyze and determine the nature of the degrees of freedom of the coupling member， determine the number of over-constraint of each coupling member.Finally，determine the number of virtual constraints through the continuity of the mechanism， and substitute the degrees of freedom calculation formula to obtain the degrees of freedom of the multi-loop coupling mechanism. Combined with example analysis， the method can not only obtain the degrees of freedom of each coupling member but also accurately calculate the degrees of freedom of the coupling mechanism. The new method has a sufficient theoretical basis and clear physical meaning， can be effectively applied to the analysis of the degrees of freedom of the coupling mechanism.关键词：Multi-loop coupling mechanism;Constraint normal line;Geometric theorem;Degree of freedom calculation
- 1
- |
- 4
- |
- 0
发布时间：2022-09-24 - 摘要：The traditional continuously variable transmission （CVT） is mainly divided into three transmission modes: hydraulic， mechanical and electric. The single transmission mode has obvious disadvantages， and the application field of composite CVT is still limited. Thus， a new hydro-electric hybrid multi-functional CVT is designed， which integrates the driving and braking energy regeneration functions of hydraulic and electric transmission， realizes the integration of mechanical energy， hydraulic energy and electric energy， and improves the performance and energy efficiency of the system. Through structural analysis and design， its working mode is formulated， and the joint simulation model of Solidworks， Matlab/Simulink and advisor is established for simulation verification under UDDS cycle. The simulation results show that the transmission structure can realize the designed continuously variable function， and the power performance， fuel economy and emission indexes of the whole vehicle are increased by 19.8%， 36.4% and 41.9% respectively at the cost of consuming about 10% SOC， which verifies the rationality and effectiveness of the CVT design.关键词：Continuously variable transmission;Hydro-electric hybrid;Double-rotor design;Associated simulation
- 3
- |
- 3
- |
- 0
发布时间：2022-09-24 - 摘要：In order to solve the problem of limited operation range of medical surgical instrument arm， a three-degree-of-freedom surgical instrument arm platform based on 4RRRR⊥ symmetrical orthogonal parallel link manipulator is proposed. The kinematic equation of the platform is derived using the vector closed loop method， and the workspace of the platform is analyzed and calculated by using the numerical search method according to the position constraints of each bar. On this basis， the numerical simulation of the forward and inverse kinematics of the platform is completed by using Matlab， and the numerical example of the forward solution shows that the error accuracy can reach the order of 10-8. At the same time， the inverse kinematics of the platform is further simulated by Adams to verify its correctness. Experiments are carried out on a prototype， and the experimental data shows that the position error of the platform controlled by the kinematic equation of the platform is ±1 mm and the attitude error is ±1°. Simulations and experiments show that the mechanism driven by the parallel manipulator， as the position adjustment platform of the surgical instrument arm， can effectively expand the dynamic adjustment range of the operating space of the surgical instrument arm. The kinematics equation also provides an important reference for the follow-up dynamic control method of this kind of redundant parallel mechanism.关键词：Redundant parallel mechanism;Kinematics analysis;Numerical simulation of forward and inverse solution;Adams simulation;Experimental verification
- 2
- |
- 4
- |
- 0
发布时间：2022-09-24 - 摘要：Aiming at the design difficulties of the key motion mechanism of the model supporting mechanism in the large-scale wind tunnel test， this manuscript proposes a new linear actuation transmission mode based on circular arc motion from the perspective of engineering practicality. This mode realizes the linear actuation function with a limited range of rotation， and overcomes the problems of high manufacturing cost and difficulty in installation and commissioning of large-size and high-precision worm gear pair in the past. To verify the effectiveness of this mode， a comprehensive analysis of the mechanism from aspects of dynamics of mechanism， kinematics of mechanism， control characteristics， stiffness and strength is conducted. At present， the design of the pitching movement transmission mechanism has been applied to the model mechanism of a large wind tunnel. The wind tunnel model has a pitch angle displacement range of 45°， and the radius of the circular motion reaches 2 800 mm. The integrated model features low cost and is easy to maintain.关键词：Wind tunnel;Model mechanism;Pitch angle;Linear actuation
- 66
- |
- 6
- |
- 0
发布时间：2022-09-24 - 摘要：In order to avoid frequent replacement of fixtures to the robot due to the clamping of disc type workpieces of various varieties and sizes on automated production lines， and improve the stability and safety of robot clamping， a self-locking under-actuated gripper is designed and optimized. The structure design of the gripper is completed based on the under-actuated principle， and the feasibility of structural self-locking and enveloping clamping is ensured through the analysis of the clamping configuration and clamping process. According to the principle of virtual work and the vector closed equation of the linkage mechanism， a static modeling under the adaptive gripping state of the gripper is constructed. A structural parameter optimization model is established according to the balance of the clamping force of each gripper knuckle， and a genetic algorithm is introduced to realize the parameter optimization. Numerical test results show that， compared with the empirical method and the Fmincon algorithm， the target value error optimized by the genetic algorithm is reduced by 70% and 62.5%， and the maximum deviation of the gripper's clamping force is reduced by 78.3% and 61.4% respectively， which verifies the superiority of the genetic optimization design of the proposed under-actuated gripper， and satisfies the stable clamping requirement of the clamper through the balance of the knuckle forces.关键词：Disc type workpieces;Self-locking;Under-actuated gripper;Genetic algorithm;Optimal design
- 3
- |
- 3
- |
- 0
发布时间：2022-09-24 - 摘要：Considering the real involute and transition curve equation of gears，an accurate model of gears is conducted. The deformation of modified gear is deduced and calculated by Weber energy method. The mapping relationships of load angle
- 1
- |
- 4
- |
- 0
发布时间：2022-09-24
Design· Calculation
- 摘要：In order to investigate the thermo elastohydrodynamic lubrication characteristics of internal meshing asymmetrical gears with addendum modification， the transient thermo elastohydrodynamic lubrication of asymmetrical polymer gears with addendum modification is analyzed by the multi-grid method. The elastohydrodynamic lubrication characteristics of modified gears with different transmission types are compared. The effects of different distribution forms of modification coefficients and tooth profile modification on the transient elastohydrodynamic lubrication of asymmetrical polymer gears under internal meshing are analyzed. The results show that asymmetrical tooth profile can improve the lubrication performance of the gears with addendum modification， and the positive transmission gear has the best lubrication performance. The larger modification coefficient of the inner gear is conducive to the thermo elastohydrodynamic lubrication performance. The moderate tooth profile modification can improve the lubrication performance of the asymmetric gears with addendum modification.关键词：Asymmetric gear;Elastohydrodynamic lubrication;Modification coefficient;Planetary gear;Tooth profile modification
- 4
- |
- 4
- |
- 0
发布时间：2022-09-24 - 摘要：In order to improve the applicability of herringbone gear modification results， it is necessary to analyze the sensitivity of gear surface modification parameters. Using Romax software， genetic algorithm is used to carry out the optimal modification of tooth profile， drum shape and topology， and the modification deformation momentum is superimposed on the optimal modification. Then considering the center distance installation error， the bearing transmission error amplitude and the maximum contact stress of the pinion are analyzed respectively. Finally， the sensitivity analysis of the change of modification parameters to transmission error and contact stress is obtained. The results show that the load transmission error amplitude is sensitive to the tooth profile modification parameters， but not to the drum shape modification parameters； after the optimal modification of the tooth profile， the bearing transmission error is not sensitive to the center distance installation error， but the drum shape modification is vice versa； the sensitivity of load-bearing transmission error amplitude to topological modification parameters is between tooth profile and drum shape modification. When the tooth profile modification is much greater than the drum shape modification， the load-bearing transmission error amplitude is not sensitive to the center distance installation error.关键词：Herringbone gear;Modification;Sensitivity;Bearing transmission error;Center distance error
- 4
- |
- 5
- |
- 0
发布时间：2022-09-24 - 摘要：The working path of welding manipulator is complex，which requires high smoothness of the planning trajectory，and the planning trajectory needs to meet the kinematics constraints of each joint. An adaptive particle swarm optimization （ADPSO） algorithm with disturbance is proposed，which can plan the optimal trajectory of time，ability and jump under joint constraints. The quintic NURBS curve is used to interpolate the joint working path points，so that the joint position，velocity，acceleration and jump curves are continuous and smooth. The ADPSO algorithm is used for multi-objective optimal trajectory planning. Firstly，the idea of particle extrapolation is combined with particle swarm optimization （PSO） algorithm to enhance the ability of particle search，and then disturbance is introduced to the individual extremum and group extremum to accelerate the convergence speed of particles. Simulation analysis is carried out in Matlab environment， compared with other intelligent algorithms，ADPSO algorithm has better optimization effect and faster optimization timeliness.关键词：Manipulator;Trajectory planning;Quintic NURBS curve;Adaptive particle swarm optimization algorithm;Multiobjective optimization
- 4
- |
- 8
- |
- 0
发布时间：2022-09-24 - 摘要：To systematically evaluate the problems of insufficient load capacity，mass over limit， low stability caused by the application of traditional gear transmission in aero-engine high-power extraction transmission system， the central transmission of aero-engine based on face gear transmission is designed， the LTCA is performed， and the contact area ratio and stress are calculated. It is concluded that the central transmission based on face gear transmission has the advantages of high load capacity， light weight and good running stability， face gear transmission can provide a new transmission design route for the existing aero-engine transmission system.关键词：Face gears;Aero-engine;Central transmission;Design;Simulation analysis
- 1
- |
- 3
- |
- 0
发布时间：2022-09-24 - 摘要：In order to study the influence of tooth profile on the transmission noise of synchronous belt， the synchronous belt of ZA and RU type are taken as the research object. The vibration simulation model of two kinds of synchronous belts is carried out to solve the frequency response curve of transverse vibration. The vibration freqency response results are used as boundary element conditions to conduct the acoustic simulation analysis of two pulleys drive of the synchronous belt，the field frequency domain curve and noise distribution cloud image are obtained by simulation. A noise source identification device for synchronous belt transmission is built based on the sound array technology， and the influence of speed on the noise of two kinds of synchronous belt is tested. By comparing the simulation results with the experimental results， it is concluded that the resonance frequency of different tooth profiles is different in the resonance region. In the non-resonant region， the noise amplitude increases with the speed， and the transmission noise of RU type synchronous belt is about 4dB higher than that of ZA type synchronous belt.关键词：Tooth profile contrast;Noise;Acoustic simulation;Acoustic array technology;Test verification
- 2
- |
- 5
- |
- 0
发布时间：2022-09-24 - 摘要：With the development of the automobile industry， the performance requirements of the new energy vehicle driving motor for its matching deep groove ball bearings are becoming more and more stringent. Aiming at the problems of lubrication and temperature rise in the use of the deep groove ball bearings for a new energy vehicle drive motor， the reasons found are that the structure of the cage is not convenient for heat dissipation and lack of lubrication. In order to meet the technical requirements and based on the original bearing seal structure used for driving motor， the design method of improving and optimizing the cage structure and the double-lip non-contact seal is put forward. Through the comparison between the example and before optimization， the test verifies that the new structure can realize the good storage of grease， form a reliable oil film， reduce the heat value of the bearings when working， realize the heat dissipation at high speed and get a better optimization design results. The bearings after taking the improvement measures can meet the requirements of customers.关键词：Rolling bearing;New energy automobile bearing;Deep groove ball bearing;Sealing structure;Plastic cage;Performance
- 9
- |
- 6
- |
- 0
发布时间：2022-09-24 - 摘要：The split anti-backlash worm pair eliminates the worm backlash by rotating and adjusting the distance between the two worms. In view of its anti-backlash method and the structural characteristics of the existence of thinner worm teeth， the factors affecting the transmission accuracy of the split anti-backlash worm pair are studied， a 3D model and motion analysis model of split anti-backlash worm pairs are established and the influencing law of worm pair use error and worm pair structure error on the transmission accuracy of worm pairs is studied. The result shows that the use error of the worm pair has a greater impact on the transmission accuracy of the worm pair than the structural error of the worm pair does， the wear in the worm gear teeth has the greatest impact on the transmission accuracy in the use error and the radial error in the structural error has the greatest influence on the transmission accuracy.关键词：Split worm pair;Use error;Structural error
- 2
- |
- 4
- |
- 0
发布时间：2022-09-24
Test·Analysis
- 摘要：There are many factors affecting the assembly quality of RV （Rotate Vector） reducer， and the assembly quality is unstable. In response to this situation， an optimized BP neural network quality prediction model based on the Sparrow Search Algorithm （SSA） is established. The transmission error of the key performance index of the reducer is used as the output index， and the key size parameters of the assembly parts are selected as the input influencing factors. After data preprocessing， use the quality prediction model to make predictions. The results show that the BP neural network prediction model improved by the Sparrow algorithm has good prediction accuracy， can effectively predict the selected index parameters， and provides help for the selection of parts in the assembly link of the RV reducer.关键词：RV reducer;Quality prediction;BP neural network;Sparrow search algorithm
- 7
- |
- 3
- |
- 0
发布时间：2022-09-24 - 摘要：Due to the underdamping dynamics characteristics of the electric drivetrain system， the pure electric vehicle is prone to shock noise or vehicle shudder under the transient conditions of acceleration/deceleration， taking off or cruise， which seriously reduces the vehicle driving comfort. The abnormal noise problem of a front drive pure electric vehicle under low-speed braking condition is taken as an example， and the test analysis and investigation process are systematically expounded. The potential abnormal noise mechanism and control strategy are proposed. Moreover， without modifying the hardware architecture of the transmission system， the abnormal noise is eliminated through the improvement and optimization of the motor torque zero-crossing filtering strategy and the active damping control. The actual vehicle test also verifies the effectiveness of the improved scheme， which has important engineering reference value for solving the transient vibration and noise problems.关键词：EV （Electric vehicle）;Active damping control;Torque filter control;Speed fluctuation;Gear backlash;Abnormal noise
- 3
- |
- 13
- |
- 0
发布时间：2022-09-24 - 摘要：The intelligent gear recognition method based on convolutional neural network can effectively identify the gear fault， but the convolutional neural network needs a lot of labeled training data， which limits the application of convolutional neural network in gear fault diagnosis. To solve this problem， a gear fault diagnosis method based on distribution adaptation layer and soft label learning is proposed. The convolutional neural network is used to extract features and soft labels. The distribution discrepancy is extracted by the distribution adaptation layer， and the soft label loss is generated by the soft label learning. The joint loss of distribution discrepancy， soft label loss and classification loss are used as the objective function， and the model is trained to diagnose the faults of target domain. The proposed method is verified by gear vibration signals. The results show that the proposed method can classify gear fault data accurately and effectively.关键词：Gear fault diagnosis;Convolutional neural network;Deep transfer learning;Distribution adaptation layer;Soft label learning
- 2
- |
- 3
- |
- 0
发布时间：2022-09-24 - 摘要：The 35T drive axle is a large-tonnage truck axle. In the process of use，there are some faults，such as shaft head ring seam welding crack，body square to round transition section fracture and body reinforcement crack，which are confirmed by Abaqus finite element analysis to be caused by insufficient strength of axle housing. Through the finite element analysis of rigidity and strength，Fe-safe fatigue life analysis under three road conditions，the analysis of two optimization schemes of machining and cost comparison，the structure of the axle housing is improved. The reliability of finite element analysis process is verified by bench test of axle housing assembly vertical bending stiffness. Through finite element analysis，bench test and market feedback，it is proved that the structure improvement is effective，which has certain guiding and reference significance for similar products.关键词：Drive axle housing;Strength;Stiffness;Fatigue life analysis;FEA;Bench test
- 8
- |
- 4
- |
- 0
发布时间：2022-09-24 - 摘要：The trapezoid spline has the characteristics of good guidance and self-centering， and its application range has been extended to the field of low-speed and high-torque transmission. Based on the tooth profile normal line method， the formula of the hob tooth profile of the trapezoid spline shaft is analyzed. At the same time， the formula for the cross-sectional shape of the forming cutter is derived. Finally， the tooth profile deviation of the involute spline shaft instead of the trapezoid spline shaft is calculated. It will provide a certain reference for the actual use and localization of related parts.关键词：Trapezoid spline;Hob tooth profile;Cross-sectional shape of the tool;Tooth profile deviation
- 0
- |
- 3
- |
- 0
发布时间：2022-09-24
Development·Application
- Technical support is provided by Beijing Founder electronics co., LTD 豫ICP备05013835号-5
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
0