During the development of a twin-countershaft transmission, a significant challenge arose concerning the assembly of a welded intermediate shaft sub-assembly. This sub-assembly featured two helical gears press-fitted and subsequently welded onto a shaft. The technical drawing mandated a precise circumferential alignment, or phasing, between the zero-reference teeth of the two helical gears at a fixed… Read more: Ensuring Positional Accuracy in Dual Helical Gears Assembly: A Technical Approach

With the rapid development of new energy vehicles (NEVs), transmission gear order noise previously masked by internal combustion engines becomes prominent. Traditional noise mitigation conflicts with compressed project timelines and limited resources. This article presents a “DNA” design methodology addressing gear failure risks by embedding noise, vibration, and harshness (NVH) considerations at the initial design… Read more: DNA Design Method for Gear Order Noise of New Energy Vehicle Transmission

In the realm of power transmission, spur gears are among the most prevalent and fundamental components. Their simple geometry and ease of manufacturing make them a staple in countless industrial applications, from automotive systems to heavy machinery. However, the theoretical perfect meshing of ideal spur gears is often disrupted in real-world scenarios. Factors such as… Read more: Advanced Tooth Surface Design for Spur Gears Using Double Spline Modification

In modern manufacturing, the demand for high-precision gear systems has driven significant research into efficient and accurate gear grinding methods. As a researcher focused on advanced machining processes, I have extensively investigated the application of universal CNC machining centers for face gear grinding. This approach leverages the flexibility of multi-axis systems to achieve complex gear… Read more: Advanced Face Gear Grinding on Universal CNC Machining Centers

The transmission of power within a final drive assembly is fundamentally achieved through gear meshing. Among various gear types, hypoid gears have found widespread application in automotive chassis systems due to their superior load-bearing capacity and excellent NVH (Noise, Vibration, and Harshness) performance. During the operation of the final drive, to ensure normal meshing transmission,… Read more: A Comprehensive Investigation into the Design Methodology for Backlash in Hypoid Gears

In recent years, the rapid growth in the number of elevators in use has been accompanied by an increase in safety incidents, such as top overrun, falling, collision, crushing, and shearing. As an expert in elevator safety, I have observed that worm gear driven elevators are particularly susceptible to top overrun due to factors like… Read more: Analysis and Prevention of Top Overrun in Worm Gear Driven Elevators

In the machining of small module gears, adjusting machine parameters according to different part specifications is essential. After confirming gear accuracy through specialized testing equipment and personnel, the machine can be locked for batch processing. For cylindrical gears with a module above 0.3, gear testing centers quickly and accurately output results. However, for straight bevel… Read more: Calculation and Verification of Tooth Shape Detection Points for Height Modification Straight Bevel Gears

In modern industrial applications, the gear shaft serves as a critical component in reducers, functioning as a power transmission mechanism that converts the rotational speed of motors through gear-based speed converters to achieve desired output speeds and higher torque. This gear shaft is indispensable in various sectors due to its role in ensuring efficient power… Read more: Analysis of Magnetic Marks on Reducer Gear Shaft

In this article, I present a comprehensive analysis of the effects of crack faults on the time-varying mesh stiffness and dynamic response of helical gear transmission systems. Helical gears are widely used in various mechanical applications due to their smooth operation and high load capacity. However, under severe working conditions, helical gears are prone to… Read more: Influence of Crack Faults on Time-Varying Mesh Stiffness and Vibration Response of Helical Gears

In the field of precision mechanical transmission, harmonic drive gear systems have garnered significant attention due to their compact design, high reduction ratios, and zero-backlash capabilities. However, as operational speeds increase and applications expand to robotics, aerospace, and high-precision control systems, the dynamic performance of harmonic drive gear systems becomes critical. Vibration and noise issues… Read more: Nonlinear Torsional Vibration Analysis of Harmonic Drive Gear Systems

In modern industrial machinery, the demand for compact, high-precision, and high-torque transmission systems has driven significant innovation in gear reduction technology. Among these, the cycloidal drive stands out due to its unique ability to offer large reduction ratios, high efficiency, and minimal backlash. I have extensively studied the 2K-V type cycloidal drive, which combines a… Read more: Development and Analysis of 2K-V Cycloidal Drives

This paper presents a novel methodology for computing machining parameters of spiral bevel gears through ease-off surface synthesis, addressing the limitations of conventional point-contact parameterization in controlling meshing performance. By leveraging differential geometry and numerical optimization, the proposed approach enables comprehensive pre-control of tooth contact patterns and transmission error characteristics. Second-order Osculating Surface Theory For… Read more: Ease-off Surface Synthesis for Spiral Bevel Gear Machining Parameters

The pursuit of higher precision, greater load capacity, and improved reliability in advanced mechanical systems for aerospace, robotics, and high-performance machine tools has driven the development of sophisticated motion conversion mechanisms. Among these, the planetary roller screw assembly (PRSA) stands out for its superior performance characteristics compared to traditional ball screws. A specific derivative, the… Read more: Fatigue Analysis and Life Prediction of a Recirculating Planetary Roller Screw Assembly under Random Vibration

In modern mechanical transmission systems, the performance of straight bevel gears is critical due to their role in transmitting motion and power between intersecting shafts. The tooth surface of a straight bevel gear is a complex spatial surface, and its meshing performance is highly sensitive to micron-level design modifications or manufacturing errors. Even slight deviations… Read more: Automatic Generation and Stress Analysis of Finite Element Mesh for Straight Bevel Gears

Straight bevel gears, while offering slightly lower load capacity compared to their spiral bevel counterparts, remain extensively utilized in medium- and low-power applications due to their lower manufacturing cost, simpler equipment requirements, and faster adaptability to design variations. Their significance extends even into heavy-duty transmission fields where large-scale machining equipment for spiral bevel gears is… Read more: Predictive Control of Machining Quality in Straight Bevel Gear Planing

As a mechanical engineer specializing in mineral processing equipment, I have encountered numerous challenges related to the maintenance and optimization of ball mills. Among these, the installation and adjustment of the small gear shaft in a ball mill stand out as critical tasks that demand precision and technical expertise. This article delves into the comprehensive methodology for installing and… Read more: Installation and Adjustment Technology for Small Gear Shaft of Ball Mill

Metal Injection Molding (MIM) has revolutionized gear technology by enabling mass production of small, geometrically complex metal components under 50g. While iron-based alloys dominate this sector, achieving precision in spur gears – characterized by repetitive features and micron-level tolerances – remains challenging due to thickness-direction deviations. This study addresses distortion control in 17-4PH precipitation-hardening stainless… Read more: Improving Thickness Direction Deviation of 17-4PH Spur Gears via Metal Injection Molding

In modern industrial applications, straight bevel gears are widely used in automotive, machine tool, and engineering machinery sectors due to their ease of processing, low cost, and ability to change transmission direction. However, the increasing demands for high performance, low consumption, and reliability in these fields necessitate higher precision in straight bevel gear manufacturing. Tooth… Read more: Measurement and Evaluation of Tooth Shape Error in Straight Bevel Gears Based on Electronic Generating Principle

This paper conducts a comprehensive analysis of the elastohydrodynamic lubrication (EHL) characteristics for a conjugate tooth pair within an inclined double-roller enveloping hourglass worm gear drive, explicitly accounting for the influence of surface roughness throughout the meshing cycle. The inherent complexity of surface interactions in precision gear drives necessitates a detailed understanding of lubrication performance.… Read more: Elastohydrodynamic Lubrication in Inclined Double-Roller Enveloping Worm Gear Drives

In my research on mechanical transmission systems, I have focused extensively on spur gear dynamics, particularly the role of stiffness excitation in vibration and noise generation. Spur gears are fundamental components in many machines, and understanding their behavior under operational conditions is crucial for optimizing performance and reducing undesirable effects. This article presents my comprehensive… Read more: Analysis of Stiffness Excitation in Spur Gear Transmissions

Hypoid gears with high reduction ratios (HRH) offer superior power density and efficiency compared to traditional worm or planetary systems. This study presents a systematic approach for optimizing tooth contact patterns through tool modification and ease-off topology analysis. 1. Mathematical Model of Tooth Surface Modification The curvature compensation for HRH gears is achieved through parabolic… Read more: Contact Simulation and Dynamic Performance Analysis of Ease-off Modified High Reduction Hypoid Gears

In the field of industrial robotics, the rotary vector reducer plays a critical role in providing high precision, high torque, and compact motion control. As a key component, the cycloidal gear within the rotary vector reducer requires exceptional accuracy and surface finish to ensure smooth operation, minimal backlash, and long service life. Traditional gear grinding… Read more: Form Grinding Wheel Profile Modification for Cycloidal Gears in Rotary Vector Reducers

The pursuit of higher power density and reliability in gear transmissions necessitates advanced manufacturing techniques. One critical method to enhance performance is lead modification, which intentionally alters the tooth flank geometry along the face width of a helical gear to compensate for deflections under load and ensure uniform stress distribution. Among various finishing processes, form… Read more: Analysis of Principle Error in Form Grinding of Helical Gears with Lead Modification

In modern mechanical engineering, the demand for high-precision components like the gear shaft has increased significantly, especially in heavy machinery applications. As an engineer specializing in CNC machining, I have extensively worked on complex parts such as the herringbone gear shaft, which presents unique challenges due to its deep tooth profiles and narrow grooves. This… Read more: Four-Axis CNC Machining of Herringbone Gear Shaft Using NX Software

In the process of precision forging for straight bevel gear components, the single most critical factor determining the final part quality is the accuracy of the tooth profile within the forging die cavity. The manufacturing of this cavity is predominantly achieved through Electrical Discharge Machining (EDM), a process where a shaped electrode erodes the desired… Read more: Precision Inspection of Electrodes for Straight Bevel Gear Forging Dies

In the realm of precision motion control and robotics, the demand for compact, high-ratio, and accurate transmission systems is ever-growing. Among the various solutions, strain wave gear systems, often referred to as harmonic drives, have emerged as a cornerstone technology due to their exceptional performance characteristics. This article delves into the advanced design and performance… Read more: Spatial Tooth Profile Design and Torsional Stiffness Analysis of Strain Wave Gears via Finite Element Simulation

In modern mechanical engineering, the design and analysis of gears play a critical role in ensuring efficient power transmission. Among various gear types, the straight bevel gear is widely used for transmitting motion and power between intersecting shafts. This article explores the parametric design of straight bevel gears using SolidWorks, enhanced by Visual Basic (VB)… Read more: Parametric Design and Finite Element Analysis of Straight Bevel Gears Based on SolidWorks

In the field of precision mechanical transmission, the planetary roller screw assembly has garnered significant attention due to its superior load-bearing capacity and longevity compared to traditional ball screw systems. As a critical component in aerospace and high-precision industrial applications, it efficiently converts rotational motion into linear motion. However, the performance of a planetary roller… Read more: Load Distribution Analysis in Planetary Roller Screw Assembly with Assembly Errors

In the field of mechanical engineering, helical gears are widely utilized due to their advantages such as smooth transmission, low noise, and high load-bearing capacity. However, diagnosing early faults in helical gears operating at low speeds presents significant challenges. As a researcher focused on improving mechanical fault diagnosis techniques, I propose a novel approach that… Read more: Fault Diagnosis of Low-Speed Helical Gears Based on Angular Domain Synchronous Average and Order Tracking Analysis

In modern petroleum and natural gas extraction, the demand for advanced drilling technologies has intensified, particularly with the shift towards deeper and more complex reservoirs. Conventional drilling rigs often face limitations in active pressure application and transport efficiency, leading to the development of top drive drilling rigs. Among the critical components of these rigs, the… Read more: Finite Element Analysis of Rack and Pinion Gear Strength in Top Drive Drilling Rigs

1. Introduction Worm gear transmission systems are widely used in industrial applications such as CNC machine tools, automotive systems, and precision instruments due to their ability to achieve high transmission ratios, smooth operation, and self-locking capabilities. However, wear, manufacturing inaccuracies, and installation errors can lead to deviations in tooth pitch, directly affecting transmission accuracy and… Read more: Efficient Detection System of Worm Gear Tooth Pitch Based on Synchronous Displacement Sampling Principle

The pursuit of higher efficiency in power transmission systems, particularly within the high-speed reducers of electric vehicles, has intensified the focus on parasitic losses. Among these, the power loss due to the churning or agitation of the lubricating oil constitutes a significant portion of the total loss at elevated operational speeds. Accurately predicting and minimizing… Read more: Analysis of Churning Power Loss in Helical Gear Pairs Based on Fluid Dynamics

In this paper, we propose a comprehensive approach for analyzing the loading contact characteristics of modified straight bevel gears. Straight bevel gears are widely used in various mechanical systems, such as automotive differentials and machine tools, due to their ability to transmit motion between intersecting shafts. However, under load, the contact behavior of these gears… Read more: Loading Contact Analysis Method for Modified Straight Bevel Gears

This study proposes a precise design methodology for skiving tools to enhance the machining accuracy of orthogonal spur face gears. By leveraging the meshing principles of crossed-axis gears and advanced numerical modeling, we develop an error-free skiving process capable of generating spur gear tooth surfaces with minimal deviations. The methodology integrates analytical derivations, computational simulations,… Read more: Accurate Design Method of Skiving Tools for Orthogonal Spur Face Gears

The relentless advancement of robotics demands increasingly high-performance components, with the reduction gearbox being a critical element. This drives continuous innovation, aiming both to enhance existing designs and to pioneer new transmission solutions. The RV (Rotate Vector) cycloidal drive has emerged as a prominent solution for robotic joints. Evolving from traditional cycloidal pin-wheel planetary drives,… Read more: Modeling, Assembly, and Analysis of a Robotic Cycloidal Drive

In high-load gear transmission systems, helical gears generate substantial heat during operation, leading to increased environmental temperatures within the gearbox. The teeth are subjected not only to mechanical loads causing significant deformation but also to thermal expansion due to temperature rise, both of which critically influence the meshing performance of helical gears. This study investigates… Read more: Thermo-Elastic Coupling and Modification of Helical Gears

In modern industrial applications, the contact fatigue failure of spur gears remains a critical bottleneck, particularly in high-power-density transmission systems. The mechanism underlying gear contact fatigue, such as pitting and micro-pitting, is complex and influenced by material properties, loading conditions, and lubrication states. Carburizing and quenching processes enhance the surface properties of spur gears by… Read more: Study on the Contact Fatigue Prediction Model of Carburized and Quenched Spur Gears with Multiaxial Stress Properties

In my research, I address the critical issue of oil groove cracks in locomotive motor gear shafts, which has led to significant operational inefficiencies and unnecessary maintenance costs. The current ultrasonic testing methods employed in the field often result in misjudgments due to structural interference and complex wave patterns, making it difficult to accurately assess… Read more: Advanced Ultrasonic Testing Methodology for Motor Gear Shafts Utilizing Inner Hole Profiling Coupling

In the manufacturing industry, precision is paramount, especially in gear production where even minor deviations can lead to significant performance issues in mechanical systems. Gear hobbing is a widely used process for generating gears, and CNC gear hobbing machines play a critical role in achieving high accuracy. However, these machines are susceptible to various errors… Read more: Compensation of Machining Error in CNC Gear Hobbing Machines

In my research, I focus on the dynamic behavior of planetary roller screw assemblies under small angular movements, which are critical in high-precision applications such as aerospace actuators, medical devices, and robotic systems. The planetary roller screw assembly is a key mechanical component that converts rotary motion into linear displacement with high load capacity, speed,… Read more: Dynamic Analysis of Small Angular Motion in Planetary Roller Screw Assemblies

In modern mechanical systems, worm gear reducers play a pivotal role due to their compact design, high transmission ratios, smooth operation, and low noise. As a design engineer focused on precision mechanical components, I often encounter challenges in optimizing worm gear systems for specific applications where space constraints and material limitations are critical. This article… Read more: Optimization Design for Enhancing the Load-Bearing Capacity of Worm Gear Reducers via ANSYS-Based Finite Element Analysis

Dynamic performance prediction and monitoring through vibration analysis is an effective approach for optimizing the design and diagnosing faults in gear transmission systems. Among the various excitations in gear dynamics, the time-varying mesh stiffness (TVMS), caused by the alternating number of tooth pairs in contact, is a primary source of parametric excitation. The frequency and… Read more: An Analytical Method for Time-Varying Mesh Stiffness Calculation of Spur Gears Considering Friction Effects

In modern manufacturing, the production of straight bevel gears has shifted from traditional machining to near net shape forming processes, particularly through metal plastic forming methods like cold forging. This approach offers significant advantages, including higher production efficiency, improved material utilization, and enhanced mechanical properties due to refined grain structures and continuous metal flow lines.… Read more: Numerical Control Method for Straight Bevel Gear Profile Accuracy in Near Net Shape Forming

In the realm of heavy-duty automotive powertrains, the drive axle stands as a critical subsystem, and at its heart lies the hyperbolic gear pair—specifically, the hypoid gear set. This gear type, characterized by its offset axes and curved teeth, is favored for its ability to provide high torque transmission, smooth operation, and a compact design.… Read more: Comprehensive Analysis of Meshing Efficiency in Hypoid Gears Considering System Deformation

In modern marine propulsion and high-power transmission systems, the demand for compact, efficient, and reliable gear systems has led to the adoption of advanced configurations such as power multi-branch gear transmissions. Among these, the power six-branch coaxial herringbone gear transmission system stands out due to its superior torque-to-mass ratio, high transmission efficiency, and structural compactness.… Read more: Dynamic Characteristics and Load Sharing Analysis of a Power Six-Branch Coaxial Herringbone Gear Transmission System

In the manufacturing of automotive components, particularly bevel gears used in drive axles, carburizing and quenching heat treatment processes are critical for enhancing surface hardness, wear resistance, and overall durability. However, these processes often introduce distortions and residual stresses due to phase transformations and thermal gradients. Material composition fluctuations can significantly influence the outcomes of… Read more: Evaluation of Carburizing and Quenching Performance of 22CrMo Bevel Gears Based on Material Composition Fluctuation

In the field of precision mechanical transmission, the harmonic drive gear stands out due to its unique operating principle, which involves the elastic deformation of a flexible spline to achieve high reduction ratios, compact design, and near-zero backlash. Traditional methods for calculating the meshing forces between the teeth of a harmonic drive gear system often… Read more: Dynamic Modeling and Analysis of Harmonic Drive Gear Systems Using Multibody Dynamics Simulation

1. Introduction Modern mechanical systems demand increasingly higher power density, efficiency, and low-carbon performance. Among critical transmission components, hypoid gear stand out due to their compact design, high reduction ratios, and ability to handle intersecting axes with offset configurations. However, the complex topological surfaces of high-reduction hypoid (HRH) gears pose significant challenges in modeling, lubrication analysis, and efficiency… Read more: Friction Power Loss Analysis and Efficiency Testing of High-Reduction Hypoid Gear

1. Introduction Spiral bevel gear is critical components in power transmission systems, offering advantages such as high load capacity, smooth engagement, and low noise. However, their complex geometry poses significant challenges in manufacturing, particularly during trial-and-error parameter adjustments for batch production. Traditional methods rely heavily on physical prototypes and iterative machining, leading to material waste,… Read more: Fast Machining Simulation and Process Optimization of Spiral Bevel Gear

In the realm of precision manufacturing, gear grinding represents a critical process for achieving high-quality gear profiles, particularly in applications demanding minimal tolerances and superior surface integrity. As a key component in worm wheel gear grinding machines, the workpiece spindle’s driving accuracy and response speed are paramount to overall machine performance. Traditional workpiece spindle designs… Read more: Direct-Drive Workpiece Spindle for Gear Grinding

In this study, we investigate the precision forging process of straight bevel gears using a combination of warm and cold forging techniques. The straight bevel gear, a critical component in various mechanical systems, requires high dimensional accuracy and strength, which can be achieved through advanced metal forming methods. We employ finite element analysis (FEA) to… Read more: Finite Element Analysis and Precision Forging of Straight Bevel Gears

The relentless pursuit of higher power density, superior efficiency, and lower carbon footprint in modern mechanical systems places immense demands on their core transmission components. Among these, gears are paramount, and their meshing quality and transmission efficiency are subjects of intense focus. Hypoid bevel gears, with their ability to transmit motion between non-intersecting, non-parallel shafts,… Read more: A Comprehensive Analysis of Friction Power Loss in Hypoid Bevel Gears: From Differential Topology to Loaded Contact and Lubrication Dynamics

Spiral bevel gears are critical components in mechanical transmission systems, offering advantages such as high load capacity, efficiency, and smooth motion. This study focuses on the parametric design and finite element analysis of logarithmic spiral bevel gears using SolidWorks and C programming. Key parameters, including modulus, tooth count, and pressure angle, are optimized to ensure… Read more: Structural Design and Mechanical Analysis of Logarithmic Spiral Bevel Gears Using SolidWorks

In the field of mechanical power transmission, straight bevel gears are widely used in various applications due to their simplicity and efficiency. However, one significant challenge associated with straight bevel gears is their high sensitivity to installation errors, which can lead to uneven load distribution, noise, and reduced lifespan. Traditional straight bevel gears operate with… Read more: Low Installation Error Sensitivity Design for Straight Bevel Gears

In this analysis, I will discuss the spalling failure observed in a gear shaft raceway during factory testing of a turboprop engine reducer. The gear shaft, integral to the reducer’s planetary gear system, experienced premature spalling after only 72 hours of operation, well below the expected service life of 200 hours. Through a comprehensive investigation… Read more: Gear Shaft Raceway Spalling Analysis in Turboprop Engine Reducer

This study investigates the mixing homogeneity of gelatin/water two-phase flow in an external helical gear pump mixer through numerical simulations and structural optimizations. The helical gear mechanism’s unique spiral tooth profile significantly influences fluid dynamics compared to spur gears, as expressed by the axial force equation: $$F_a = \frac{2\pi T}{d_m \tan\beta$$ where $T$ represents torque,… Read more: Numerical Simulation and Structural Optimization of Gelatin/Water Two-Phase Flow Field in External Helical Gear Pump Mixer

In the pursuit of higher performance in power transmission systems, gear design continuously evolves. This analysis focuses on a comparative study of the structural strength under load for three types of gear pairs: the standard involute spur gear, the common involute helical gear, and a specialized variant known as the double-helical bevel gear. The double-helical… Read more: Comparative Strength Analysis of Spur, Helical, and Double-Helical Bevel Gears Using Finite Element Method

In power transmission systems, the spur gear stands as one of the most fundamental and widely used components. The reliable and efficient operation of a spur gear pair is intrinsically linked to the performance of the lubricating film separating the contacting teeth. Under steady-state rolling and sliding conditions, the elastohydrodynamic lubrication (EHL) regime typically maintains… Read more: Elastohydrodynamic Lubrication Analysis of Spur Gears under Oscillatory Motion with Solid Particle Contamination

Abstract The propose a systematic methodology to optimize the meshing efficiency of hypoid gear in drive axles using gear friction-loaded tooth contact analysis (FLTCA). By presetting peak-to-peak values of unloaded transmission errors and contact zone positions, we achieved tooth surface modification for both drive and coast sides of hypoid gear. An optimization model was established to maximize meshing… Read more: Optimal Design of Hypoid Gear Meshing Efficiency in Drive Axles

In modern manufacturing, the production of fine-pitch spur gears often involves multiple machines on a single line simultaneously producing gears with different parameters. However, existing gear measurement instruments cannot perform real-time, full inspection of these diverse spur gears in a mixed production environment without prior knowledge of their specifications. This limitation stems from the need… Read more: Parameter-Free Parallel Fast Measurement of Fine-Pitch Spur Gears