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Article
Precision evolution model for the grinding-wheel wear in ELID grinding of nonstandard ultra-precision bearing raceways
Bearings are an important part of the aviation equipment. The working accuracy, performance, service life, and reliability of bearings directly determine the performance of the aviation equipment. The manufact...
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Article
Rounding mechanism of a novel double-disc arc-contact lap** for high-precision rollers
Centerless grinding is the main technology for mass processing of rotary parts, which can improve the roundness of rotary parts. With the demand for higher levels of roundness accuracy (within 0.3 μm), the de...
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Article
Study on friction and wear properties of cast iron material in line contact condition based on free abrasive grinding experiment
In order to study the friction and wear properties of cast iron in free grinding environment under the condition of line contact, this paper presented a new method to calculate the friction coefficient by meas...
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Article
Advances in ultra-precision machining of bearing rolling elements
Rolling bearings are extensively employed in the modern machinery industry and are critical industrial base elements. The machining accuracy of bearing rolling elements has a great impact on the service perfor...
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Article
Modeling of oxide-film thickness in electrolytic in-process dressing grinding with workpiece swing
This paper proposes a modeling method for oxide-film thickness to determine the quantitative relationship between the current and oxide-film thickness in electrolytic in-process dressing (ELID) grinding with w...
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Article
Electrolytic in-process dressing grinding of arc groove with workpiece swing
This paper proposes an electrolytic in-process dressing (ELID) grinding method with workpiece swing to solve the problem associated with the duplication of profile errors between the wheel and groove in the cu...
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Article
Performance and mechanism of hole-making of CFRP/Ti-6Al-4V stacks using ultrasonic vibration helical milling process
This work firstly evaluated the machinability of ultrasonic vibration helical milling (UVHM) process on the multilayer carbon fiber reinforced polymer (CFRP)/Ti-6Al-4V stacks, comparing with conventional helic...
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Article
Mechanism of ultra-high-speed cutting of Ti-6Al-4V alloy considering time-dependent microstructure and mechanical behaviors
High-speed cutting (HSC) and ultra-high-speed cutting (u-HSC) (6.07–32.7 m/s) tests of Ti-6Al-4V alloy were developed based on an improved Split Hopkinson Pressure Bars (SHPB) system. Specific cutting energy w...
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Article
Real-time exact contour error calculation of NURBS tool path for contour control
The requirement of high-speed and high-precision contouring with NURBS tool path to the CNC machining process is increasing. The calculation of the contouring error (CE) of the NURBS tool path to real time is ...
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Article
Influence of oxide layer on grinding quality in ELID grinding bearing outer ring raceway with workpiece-cathode
Surface quality of workpiece could be significantly improved by ELID grinding. However, ELID grinding bearing outer ring raceway with small inner diameter has small space, which limits installation of electrod...
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Article
Kinematic view of cutting mechanism in hole-making process of longitude-torsional ultrasonic assisted helical milling
Compared with conventional hole-making process, rotary ultrasonic machining (RUM) is commonly believed to improve the cutting performance, such as low cutting force, good hole quality, long tool life, and high...
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Article
Edge surface grinding of CFRP composites using rotary ultrasonic machining: comparison of two machining methods
Edge surface grinding has been widely applied in achieving functional surfaces and repairing the damage surfaces of carbon fiber–reinforced plastic (CFRP) composites especially with complex three-dimensional f...
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Article
A comparative study on state of oxide layer in ELID grinding with tool-cathode and workpiece-cathode
As a relatively new grinding technology, ELID (electrolytic in-process dressing) is widely used in some businesses. The oxide layer plays an important role in ELID grinding performance. The purpose of this wor...
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Article
Constitutive modeling for Ti-6Al-4V alloy machining based on the SHPB tests and simulation
A constitutive model is critical for the prediction accuracy of a metal cutting simulation. The highest strain rate involved in the cutting process can be in the range of 104–106 s–1. Flow stresses at high strain...
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Article
ELID groove grinding of ball-bearing raceway and the accuracy durability of the grinding wheel
The groove profile of ball-bearing raceway is of vital importance to ensure the bearing transmission accuracy. It is an attempt to apply electrolytic in-process dressing (ELID) groove grinding for the ball-bea...
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Article
Study on surface defects in milling Inconel 718 super alloy
Nickel-based alloys have been extensively used as critical components in aerospace industry, especially in the key section of aeroengine. In general, these sections are manufactured by milling process because ...
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Article
Multiobjective optimization of cutting parameters in Ti-6Al-4V milling process using nondominated sorting genetic algorithm-II
The present article established empirical models of tool life, residual stress, and surface roughness according to titanium alloy milling parameters. The empirical models were utilized for optimization of prod...
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Article
Prediction of heat transfer process in helical milling
This paper represented a three-dimensional heat transfer model which describes the temperature distribution with the time variation in solid with conduction-convection boundary during the helical milling proce...
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Article
Precision grinding of bearing steel based on active control of oxide layer state with electrolytic interval dressing
The oxide layer state directly relates to machining quality in electrolytic in-process dressing (ELID) grinding. In this paper, intermittent grinding control strategy was used to monitor and control the state ...
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Article
Prediction of cutting forces in helical milling process
The prediction of cutting forces is important for the planning and optimization of machining process in order to reduce machining damage. Helical milling is a kind of hole-machining technique with a milling to...
