In modern electric vehicles, transmission systems emerge as primary noise sources during operation. Effective noise reduction in transmissions is pivotal for achieving “silent mode” driving experiences. Among various noise contributors, gear meshing noise stands out as particularly significant. This necessitates in-depth research into gear modification techniques for electric vehicle transmissions. Application Principles of Gear Modification… Read more: Research on Gear Modification Technology for Electric Vehicle Transmissions

Abstract:Based on the demand for high efficiency in cylindrical gear chamfering in production, a chamfering method based on rotational indexing end face chamfering is proposed. This article utilizes tables, images, and formulas to comprehensively summarize and present the research content. Keywords: cylindrical gear; rotational indexing machining; swept surface; end face chamfering; cutting simulation 1. Introduction… Read more: Chamfering Method of Cylindrical Gear Tooth Profile Based on Rotational Indexing Machining

This study investigates the influence of deflection angle on fertilizer discharge uniformity in reverse meshing spur gear fertilizer distributors. Spur gears, characterized by their straight teeth and parallel shafts, form the core mechanism of this system. The distributor consists of counter-rotating spur gears enclosed in a fertilizer box, where the intermeshing teeth create dynamic cavities… Read more: Impact of Deflection Angle on Fertilizer Discharge Performance in Reverse Meshing Spur Gear Distributors

1. Fundamentals of Worm Gear Reducer Optimization Worm gear reducers, widely used in industrial machinery for torque amplification and speed reduction, require precise design optimization due to their inherent sliding friction characteristics. This study focuses on minimizing the volume of the bronze worm wheel while ensuring mechanical performance, using MATLAB-based nonlinear programming. 2. Mathematical Modeling… Read more: Nonlinear Programming Design of Worm Gear Reducer

In China’s 13th Five-Year Plan, marine engineering stands as a pivotal domain encompassing offshore cranes, drilling platforms, pipe-laying vessels, wind farms, and ship installations. These applications universally demand robust transmission systems centered around large gear mechanisms—specifically open gears deployed in critical equipment like cranes and winches. Given the marine environment’s harshness—characterized by saltwater corrosion, dynamic… Read more: Large Herringbone Gear Manufacturing Technology in Marine Engineering

In gear manufacturing, gear hobbing stands as a pivotal process for generating high-precision gears across diverse industries like automotive, aerospace, and industrial machinery. This methodology enables the efficient production of spur, helical, and worm gears through a continuous generating motion. The core principle involves synchronized rotational and translational movements between the workpiece and a multi-toothed… Read more: Gear Hobbing Processing Plan Formulation and Beat Calculation Method

Herringbone gears, characterized by their dual-helical structure with equal and opposite helix angles, are widely used in high-power transmission systems. However, symmetry deviations between the left and right helical teeth inevitably occur during manufacturing, leading to axial vibration and noise. This study investigates the impact of symmetry deviations on the axial vibration characteristics of herringbone… Read more: Influence of Symmetry Deviation of Herringbone Gears on System Vibration Characteristics

Traditional tractor transmissions face challenges in achieving compactness, lightweight design, and multi-gear configurations. This study introduces a novel transmission architecture utilizing face gears combined with a planetary gear system to address these limitations. The design leverages the unique advantages of planetary gear trains, including torque distribution stability and structural compactness, while integrating face gears for… Read more: A New Multi-Gear Transmission Design Based on Planetary Gear System

AbstractLoaded transmission error (LTE) is a crucial parameter in evaluating the dynamic meshing performance of gears. This research focuses on the LTE of internal short tooth spur gear, aiming to improve their meshing performance. Models of internal short tooth spur gear pairs were established using Romax software. The influence of tooth profile and gear helix… Read more: Research on Loaded Transmission Error of Internal Short Tooth Spur Gear

This study proposes a discrete high-order contact analysis method for spiral bevel gears by integrating ease-off topology with differential geometry. The methodology addresses limitations in traditional second-order contact analysis and establishes a computationally efficient framework using finite difference techniques. 1. Theoretical Framework The mathematical foundation combines ease-off surface equations with gear meshing kinematics. For conjugate… Read more: High-Order Contact Analysis of Spiral Bevel Gears Based on Ease-Off Topology

This paper presents an advanced measurement system designed to evaluate machining parameters of cylindrical gears while accounting for permissible manufacturing deviations. By integrating machine vision and motion control technologies, the system achieves enhanced accuracy in gear parameter quantification through systematic error compensation strategies. System Architecture and Hardware Implementation The measurement framework for cylindrical gear analysis… Read more: Precision Measurement System for Cylindrical Gear Machining Parameters with Manufacturing Error Compensation

Helical gears are critical components in coal mining machinery, where their meshing performance directly affects operational reliability. This study focuses on optimizing the contact characteristics of helical gear pairs in cutting reducers by addressing shafting deformation effects and implementing tooth modification strategies. 1. Load Capacity Analysis of Helical Gears The basic parameters of the studied… Read more: Optimal Design of Meshing Contact for Helical Gear Pairs in Cutting Reducers

As industrial automation advances, demand for high-precision small-module gears grows exponentially, placing greater emphasis on the productivity and accuracy of high-speed gear shaping equipment. Traditional gear shaping machine spindles often experience dry friction and seizure during high-stroke operations, limiting their efficiency. Hydrostatic spindles offer superior stability, minimal friction, and near-zero wear, making them ideal for… Read more: Effect of Axial Groove Structure on Hydrostatic Spindle Performance in High-Speed Gear Shaping Machines

Abstract This paper focuses on the issues of uneven load distribution caused by crossed axes and the lack of an effective flash temperature calculation method in the anti-scuffing design of herringbone gear. Based on the influence coefficient method, the paper proposes a non-Hertz contact analysis method for herringbone gear under crossed axes, considering the influence… Read more: Non-Hertz Contact Flash Temperature Calculation Method for Herringbone Gear Tooth under Crossed Axes

This study investigates the power loss mechanisms in hypoid gear-driven commercial vehicle axles through theoretical modeling and experimental validation. By analyzing geometric parameters, lubrication characteristics, and bearing configurations, we establish a comprehensive efficiency prediction framework with practical correction factors. 1. Power Loss Mechanisms in Hypoid Gear Systems The total power loss ($P_{\text{total}}$) in drive axles… Read more: Analysis and Calculation of Transmission Efficiency in Commercial Vehicle Drive Axles

Abstract Herringbone gear, which not only possess the high load-bearing capacity of helical gear but also overcome the axial force defects of the latter, are widely used in high-speed and heavy-load applications such as ships and aerospace. Manufacturing-induced symmetry deviations in herringbone gear can lead to uneven load distribution, particularly prominent in high-speed and heavy-load… Read more: Herringbone Gear Symmetry Deviation Characterization and Measurement Methods

Herringbone gears, characterized by their V-shaped tooth arrangement, play a critical role in heavy-duty mechanical transmissions due to their unique ability to cancel axial thrust forces. This study presents a systematic approach for developing a parametric modeling system using SolidWorks API and VB programming, significantly improving design efficiency by 68% compared to manual modeling methods.… Read more: Parametric Modeling and Analysis of Herringbone Gears Based on SolidWorks Secondary Development

AbstractThe surface quality of spur gear directly influences their transmission accuracy and fatigue life during gear transmission. As 20CrMnTi steel is commonly used for spur gear due to its high impact load capacity and good wear resistance, the hobbing and subsequent shot peening processes can alter the surface quality of spur gear. Therefore, studying the… Read more: Research on Gear Hobbing and Surface Shot Peening of Spur Gear

Traditional CAD methods face significant challenges when modeling complex 3D geometries like reverse gears, particularly bevel gears with precise involute profiles. This article presents an innovative reverse CAD methodology that transforms conventional design workflows. Unlike forward design requiring extensive programming, this approach leverages CAD software’s macro recording capabilities to automate parametric modeling. The core innovation… Read more: Reverse Gear Parametric Modeling: A Novel Approach to Complex 3D Design

In modern industrial applications, cylindrical gears play a pivotal role due to their high efficiency, compact structure, and precision. Traditional spur, helical, and herringbone gears face limitations such as insufficient load capacity, axial thrust forces, and complex manufacturing. To address these challenges, cylindrical gears with circular arc tooth lines (CATL) have emerged as a promising… Read more: Modeling and Contact Stress Analysis of Cylindrical Gear with Circular Arc Tooth Line

As a researcher specializing in mechanical transmission systems, I have dedicated significant effort to understanding the nonlinear dynamics of worm gear systems. This article presents a comprehensive analysis of the time-varying stiffness and nonlinear dynamic behavior of involute worm gear systems, focusing on their meshing characteristics, dynamic responses, and stability under various operational conditions. 1.… Read more: Nonlinear Dynamic Analysis of Worm Gear Transmission Systems with Time-Varying Stiffness

The cutting force modeling in spiral bevel gear machining using the forming method represents a critical foundation for machine tool design, vibration control, and process optimization. This study establishes an instantaneous cutting force prediction model through theoretical derivation and experimental validation, addressing the unique challenges in forming-based gear manufacturing. 1. Fundamental Principles of Forming Method… Read more: Research on Cutting Force Model of Forming Spiral Bevel Gears

With the increasing demand for high-speed and high-power-density gear transmission systems, reducing vibration and noise has become critical. This study investigates the dynamic behavior of spur gears under the combined effects of random transmission errors and stochastic tooth surface friction parameters. We establish a three-degree-of-freedom bending-torsional coupled vibration model and analyze how these stochastic factors… Read more: Analysis of Spur Gear Pair Vibration Characteristics Considering Random Error and Tooth Surface Friction

Worm gear reducers play a critical role in mining shuttle cars due to their compact structure and high transmission ratio. However, challenges such as severe overheating, low efficiency, rapid wear, and short service life persist in domestically produced units. This paper systematically analyzes failure mechanisms and proposes optimized solutions through material selection, surface quality control,… Read more: Fault Analysis and Improvement of Worm Gear Reducer for Mining Shuttle Cars

High-precision modified gears are critical for high-performance transmission systems in industrial robots and new energy vehicles. Hobbing enables efficient roughing/semi-finishing of cylindrical gears, while gear honing offers high efficiency and superior surface quality in finishing. Synergistic hobbing-honing integration enhances both precision and productivity. However, uneven residual allowances from hobbing adversely affect gear honing accuracy, efficiency,… Read more: Hobbing Pre-Modification and Honing Allowance Control for Gear Hobbing-Honing Synergy

Helical gears are widely adopted in heavy-load transmission systems due to their smooth meshing characteristics and high load capacity. However, edge contact and stress concentration caused by manufacturing errors and elastic deformation significantly affect their dynamic performance. This study investigates the impact of profile and lead crowning modifications on the contact stress distribution and transmission… Read more: Optimization of Load-Bearing Contact Dynamics for Helical Gear Pairs Through Tooth Surface Modification

Abstract Spur gears, as crucial transmission components, are widely used in automobiles and various machinery equipment. Traditional manufacturing methods such as hobbing and shaping often disrupt the metal flow lines in the tooth area, reducing the gears’ strength and lifespan. To address these issues, this paper develops a one-step extrusion moulding process for spur gears.… Read more: Design of Extrusion Moulding Process for Spur Gear and the Preparation

Gears are critical components for motion and power transmission, characterized by constant-power transmission. Their performance largely determines equipment functionality, granting them strategic importance in national economy and defense. Geometric elements constructed tooth gears represent a novel gear type featuring convex-concave meshing point contacts, exhibiting superior load capacity and lubrication performance. These gears have been applied… Read more: Design Theory and Experiment of Geometric Elements Constructed Cylindrical Tooth Gear Shaving Cutter

As a researcher specializing in elevator safety and mechanical wear analysis, I have dedicated significant effort to exploring non-destructive methods for assessing the health of critical components such as worm gears in asynchronous machine reducers. This article synthesizes my findings on utilizing oil detection technology to evaluate wear in worm gear systems, offering actionable insights… Read more: Wear Analysis of Worm Gear in Asynchronous Machine Reducer Based on Oil Detection Technology

Planet gear reducers have become indispensable components in aerospace systems due to their compact design and high torque density. However, unexpected tooth fractures observed during endurance testing of a high-lift system reducer revealed critical limitations in traditional design approaches. Through comprehensive modeling and experimental validation, this study establishes a systematic methodology for optimizing planet gear… Read more: Fault Analysis and Design Optimization of Planet Gear Reducers in Aerospace Applications

Abstract Gears are widely used in aerospace, automotive, and energy fields. Failures of spur gear can result in economic losses and significant safety accidents. This paper focuses on the crack propagation analysis and fatigue life prediction of spur gear tooth roots. 1. Introduction The uneven distribution of load on spur gear teeth during actual meshing… Read more: Crack Propagation Analysis and Fatigue Life Prediction of Spur Gear

This paper establishes a pure torsional nonlinear dynamic model for star-type herringbone gear systems using the lumped mass method. By solving vibration differential equations through numerical integration and analyzing phase diagrams/Poincaré sections, we reveal how meshing damping ratios affect vibration responses under different rotational speeds. The results demonstrate that increasing meshing damping effectively suppresses chaotic… Read more: Nonlinear Bifurcation Characteristics of Star Herringbone Gear Transmission Systems

This study investigates the bending stress characteristics of cylindrical gears with variable hyperbolic circular arc tooth lines under equal displacement conditions. By establishing mathematical models and conducting finite element analysis, the effects of displacement coefficients, cutter parameters, and geometric configurations on root bending stress are systematically explored. 1. Mathematical Modeling of Tooth Surface The tooth… Read more: Influence of Design Parameters on Bending Stress of Cylindrical Gears with Hyperbolic Circular Arc Tooth Line

Spiral bevel gears are widely recognized for their high transmission efficiency, compact structure, and smooth meshing performance. However, traditional dual-sided hobbing methods face challenges in controlling meshing quality, especially for small-modulus spiral bevel gears used in agricultural machinery, electric tools, and precision instruments. This study proposes a half-roll cutting method to improve machining efficiency, reduce… Read more: Research on Half-Roll Cutting Method for Small-Modulus Spiral Bevel Gears

The evolution of gear forging technology represents a paradigm shift in manufacturing efficiency, material utilization, and mechanical performance. Unlike traditional machining methods that remove up to 40% of material, net-shape forging achieves near-final geometry with minimal waste. This research establishes a hybrid warm-forging/cold-sizing process capable of producing ISO grade 5-6 cylindrical gears without post-forging tooth… Read more: Development of Net-Shape Gear Forging Technology

AbstractTo reduce the windage power loss in herringbone gear transmission systems, an aerodynamic model of the internal air within the herringbone gear transmission system is established based on dynamic mesh technology. The airflow characteristics inside the gearbox are simulated and analyzed, exploring the influence of gear speed, the distance from wind screens and baffles to… Read more: Analysis of Windage and Drag Reduction of High-Speed Herringbone Gear Transmission System

Herringbone gear transmissions offer high load capacity, smooth operation, and minimal axial loads, making them critical components in heavy machinery for energy equipment, marine vessels, and aerospace applications. The increasing demand for stability, reliability, and low noise in large machinery drives the development of high-precision herringbone gears with extended service life. However, gear machining imperfections,… Read more: Effect of Symmetry Error and Error Coupling Compensation on Meshing Characteristics of Herringbone Gears

This study investigates the meshing behavior of extended epicycloid hypoid gears through finite element analysis and experimental validation. Key parameters including contact patterns, bending stress, contact ratio, and transmission error are systematically analyzed to establish performance correlations under varying loads. Finite Element Modeling The hypoid gear pair was discretized using hexahedral elements with Jacobian coefficients… Read more: Analysis of Meshing Characteristics in Extended Epicycloid Hypoid Gears

Abstract: The instantaneous characteristics of a driven gear tooth back profile pushing an active gear tooth back profile. Based on gear meshing principles and a dissipative collision contact force model, tooth surface meshing and tooth back collision models are established, with a collision restoration coefficient introduced to describe the energy loss during tooth back collisions.… Read more: Meshing-Impact in Spur Gear Systems with Varying Degrees of Local Tooth Fracture

1. Dynamic Modeling of Spur Gear Meshing System The dynamic behavior of spur gears under meshing conditions is governed by nonlinear interactions between friction, stiffness, and damping. Considering the friction torque and backlash effects, the dynamic equations for a spur gear pair can be expressed as: $$ \begin{cases} I_p \ddot{\theta}_p = T_p – R_p \sum_{i=1}^{n_z}… Read more: Detection Method for Meshing Wear State of Spur Gear Based on Improved Spectral Residuals

This study investigates the machining mechanisms and parameter optimization of equal-height spiral bevel gears. Through theoretical analysis, finite element simulation, and experimental validation, we establish a comprehensive framework for enhancing gear cutting precision. Key innovations include a novel three-pin clamping structure for milling cutter heads and genetic algorithm-based parameter optimization. Machining Principle Analysis The conjugate… Read more: Research on Cutting Simulation and Optimization of Cutting Parameters for Equal-Height Spiral Bevel Gears

This paper presents a machine vision-based method for online measurement of helical gear helix angles using curve fitting algorithms. The proposed system integrates end-face measurement modules with side-view analysis to achieve rapid parameter detection while maintaining industrial compatibility. 1. Measurement System Architecture The vision system combines dual imaging modules for comprehensive gear analysis: Component Specification… Read more: Machine Vision-Based Online Detection Method for Helical Gear Helix Angle

AbstractThis paper focuses on the numerical simulation and parameter optimization of the carburizing and quenching process for cylindrical gear, aiming to enhance gear performance in terms of wear resistance and fatigue life. By utilizing numerical simulation techniques, the influence of critical process parameters on carburizing efficiency and gear properties is investigated, and an optimized process… Read more: Carburizing and Quenching Process for Cylindrical Gear

Worm gear mechanisms, characterized by their compact design and self-locking capability, are widely employed in butterfly valve systems across offshore oil platforms. The unique meshing principle between the worm and worm wheel enables torque amplification through a high transmission ratio, typically expressed as: $$i = \frac{z_2}{z_1}$$ where \( z_1 \) represents the number of worm… Read more: Troubleshooting and Maintenance Strategies for Worm Gear-Driven Butterfly Valves in Offshore Environments

Gear transmission systems in high-speed trains demand exceptional reliability, with surface contact fatigue being the predominant failure mode in enclosed gear systems. This study investigates surface cracking phenomena in S40C steel gears subjected to induction hardening. Surface-initiated grinding cracks represent a critical failure mechanism that compromises gear integrity through subsurface crack propagation under cyclic loading.… Read more: Analysis of Grinding Cracks on S40C Steel Gear Surfaces

This paper proposes a novel cylindrical gear with planar spiral tooth traces that demonstrates superior anti-deflection characteristics compared to traditional spur and helical gears. The mathematical model and machining methodology are systematically analyzed through theoretical derivation and experimental validation. 1. Geometric Model and Mathematical Foundation The planar spiral toothed cylindrical gear features asymmetric curvature radii… Read more: Research on Planar Spiral Toothed Line Cylindrical Gears and High Efficiency Machining Device

This paper investigates the dynamic behavior of herringbone gear transmission systems through multi-body dynamics modeling and experimental validation. A novel rigid-flexible coupling model incorporating gearbox-bearing-shaft interactions is developed to analyze vibration mechanisms under manufacturing/assembly errors. 1. Dynamic Modeling Methodology The governing equations for herringbone gear dynamics consider both translational and rotational motions: $$ \begin{bmatrix} M… Read more: Dynamic Modeling and Vibration Characteristics of Herringbone Gear Transmission Systems

AbstractThis paper focuses on the lubrication and temperature field analysis of herringbone gear, which are crucial components in aerospace and marine power transmission systems. Utilizing computational fluid dynamics (CFD) methods, the study investigates the lubrication performance and temperature distribution under various jet lubrication conditions, gear structures, and operating conditions. Tables and figures are employed to… Read more: Injection Lubricating Flow Field Simulation and Temperature Field Analysis of Herringbone Gear

Modal analysis is essential for understanding the dynamic characteristics of spiral bevel gears, which are critical components in aerospace and heavy-duty transmission systems. This study focuses on constructing an accurate digital twin model of a spiral bevel gear through experimental and simulation methods to address measurement limitations in traditional modal testing. 1. Methodology 1.1 Modal… Read more: Extraction and Analysis of Modal Parameters for Spiral Bevel Gear Digital Twin

Abstract: The elastic deformation of molds during the cold precision forging process of spur gears, which affects the forming accuracy of the gears. Based on the radial shunt method, steel billets with different pressure relief hole diameters were designed, and a finite element model for billet plastic deformation and mold stress analysis was established to… Read more: Cold Precision Forging Steel Billet for Spur Gear on Mold Elastic Deformation

The forged gear blank serves as a critical intermediate component in automotive transmission systems, particularly for spiral bevel gears in rear axles. Traditional manufacturing methods face limitations in material utilization, energy efficiency, and dimensional precision. This study establishes an integrated numerical framework combining finite element analysis (FEA) and experimental validation to optimize the entire manufacturing… Read more: Comprehensive Analysis of Forged Gear Blank Manufacturing and Die Life Optimization

Planetary gear systems are critical components in automotive and industrial machinery, where undetected planet gear cracks may lead to catastrophic failures. This study establishes a high-fidelity rigid-flexible coupling model to analyze vibration characteristics under planet gear crack faults. A typical automotive planetary gear system is investigated, consisting of a sun gear (18 teeth), three planet… Read more: Crack Fault Diagnosis in Planetary Gear Systems Using Rigid-Flexible Coupling Dynamics Model

Ensuring the operational reliability of shearers is paramount for efficient and safe coal production. Among critical components, the gears within the shearer’s cutting section are highly susceptible to failure due to harsh operating conditions and heavy loads. Traditional fault diagnosis methods often struggle with complex feature extraction and accurate prediction. Deep learning offers a promising… Read more: Gear Failure Prediction in Shearer Cutting Section Based on Deep Learning

Abstract: Rolling forming technology can significantly improve the utilization rate of metal materials and enhance the fatigue strength of gears. This paper focuses on the rolling forming process of spur gear, deriving tooth surface equations, realizing tooth surface point calculation, and utilizing DEFORM software for simulation. The study analyzes equivalent stress fields, equivalent strain fields,… Read more: Numerical Simulation and Lug Control of Rolling Forming Motion Process for Spur Gear

Spur gears remain critical components in mechanical power transmission systems due to their simplicity and efficiency. Accurate evaluation of bending stress at the tooth root is essential for predicting fatigue life, as gear longevity inversely correlates with the sixth power of maximum bending stress. This study introduces an isogeometric analysis (IGA) approach for spur gear… Read more: Isogeometric Analysis of Bending Strength in Spur Gears

This paper presents a systematic approach for optimizing the meshing efficiency of face-hobbed hypoid gears through friction-loaded tooth contact analysis (FLTCA). By integrating multi-objective constraints and advanced surrogate modeling techniques, we establish a robust framework for improving power transmission performance while maintaining structural reliability. 1. Tooth Surface Design Methodology The design of hypoid gear tooth… Read more: Optimization of Hypoid Gear Meshing Efficiency in Automotive Drive Axles

Gear technology represents one of the most fundamental transmission mechanisms in mechanical engineering, with a history spanning over 2,400 years. As critical components for power transmission and speed modulation, gears permeate modern industry—from aerospace and marine engineering to micro-robotics and medical devices. Among emerging innovations in gear technology, point-line meshing gears have demonstrated exceptional potential… Read more: Research Status and Prospect of Point-Line Meshing Gear Technology

This study investigates the meshing characteristics of herringbone gears under varying lead crowning modifications and staggered tooth arrangements. We propose a novel Newton-Raphson iteration method to solve axial displacement challenges in double helical gear systems, addressing limitations in traditional approaches when handling large-scale manufacturing deviations. 1. Load-Deformation Compatibility Model The meshing behavior of herringbone gears… Read more: Analysis of Meshing Behavior in Herringbone Gears Considering Lead Crowning and Stagger Angle Effects

This study investigates the contact fatigue crack propagation mechanism in cylindrical gears with variable hyperbolic circular-arc-tooth-trace (VH-CATT), focusing on stress intensity factors and crack growth patterns. The analysis integrates finite element simulations, extended finite element method (XFEM), and numerical curvature modeling to optimize gear design and enhance durability. 1. Theoretical Framework of VH-CATT Cylindrical Gears… Read more: Contact Fatigue Crack Propagation Characteristics of Cylindrical Gear with Variable Hyperbolic Circular-Arc-Tooth-Trace

Spiral bevel gears are critical components in automotive and aerospace transmission systems. Traditional machining methods face challenges such as low efficiency and material waste. Near-net shape forging technology significantly improves material utilization while enhancing mechanical properties through optimized fiber flow. This study investigates the microstructure evolution of 20CrMnTiH steel spiral bevel gears during multi-stage forging… Read more: Study on Microstructure Evolution and Process Optimization of Spiral Bevel Gear in Near-Net Shape Forging