A Novel Lapping Method for High Precision Balls Based on Variable-Radius V-Groove

Zhao, Ping; Guo, Wei; Feng, Ming; Lv, Binghai; Deng, Qian Fa; Yuan, Ju Long

doi:10.1115/1.4025991

Cited by 6 publications

(6 citation statements)

References 4 publications

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“…In this study, different ω A , ω B , δ and e were selected and adopted orthogonally to investigate their effects on the quality of final surface finish. As presented in Table 3, the range of each cutting parameter were determined according to the previous experiments [9,10], which were proved to be appropriate ranges for the polishing of ceramic balls. The rotation speeds of the upper and lower polishing plates ranged from 10 to 30 rpm and 20 to 60 rpm; the eccentricity and machining gap increased from 5 to 15 mm; machining gap ranged from 0.8 to 1.2 mm, all of which were optimized in our previous research.…”

Section: Materials Water Glycerol Antirust Agent Dispersantmentioning

confidence: 99%

“…However, the improvement of spherical error was not promising. Zhao et al [9] proposed a variable-radius V-groove polishing method by changing the spin angle of the abrasive plate. By adopting this method, the G16 level steel balls were polished to G5 level after 10 revolutions of the lower plate, and the machining time reported was only two minutes.…”

Section: Introductionmentioning

confidence: 99%

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Polishing of Silicon Nitride Ceramic Balls by Clustered Magnetorheological Finish

Xiao

Mei

et al. 2020

Micromachines

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In this study, a novel finishing method, entitled clustered magnetorheological finish (CMRF), was proposed to improve surface finish of the silicon nitride ( Si 3 N 4 ) balls with ultra fine precision. The effects of different polishing parameters including rotation speeds, eccentricities and the machining gaps on surface finish of Si 3 N 4 balls were investigated by analyzing the roughness, sphericity and the micro morphology of the machined surface. The experimental results showed that the polishing parameters significantly influenced the surface finish. The best surface finish was obtained by using the polishing parameters: the machining gap of 0.8 mm, the eccentricity of 10 mm and the rotation ratio of 3/4. To further investigate the influence of the polishing parameters on the surface finish, an analytical model was also developed to analyze the kinematics of the ceramic ball during CMRF process. The resulting surface finish, as a function of different polishing parameters employed, was evaluated by analyzing the visualized finishing trace and the distribution of the contact points. The simulative results showed that the distribution and trace of the contact points changed with different polishing parameters, which was in accordance with the results of experiments.

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Section: Materials Water Glycerol Antirust Agent Dispersantmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polishing of Silicon Nitride Ceramic Balls by Clustered Magnetorheological Finish

Xiao

Mei

et al. 2020

Micromachines

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“…6 In order to improve the lapping accuracy and efficiency of ceramic balls, researchers have developed a series of ceramic balls lapping methods. [7][8][9][10][11] Among them, considering the economics Kang and Hadfield's 12 eccentric v-groove lapping method and Zhao et al's 13 variable-radius groove lapping method have significant advantages in batch lapping of ceramic balls. Zhou et al, 14 Guo et al, 15 and Zhou et al 16 studied the basic theory of ball surface forming with variable-radius groove lapping method.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on lapping ceramic balls with variable-radius groove plate

Zhou

Yao

Yuan

et al. 2021

Advances in Mechanical Engineering

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The method of lapping precision ball with variable-radius groove is developed in recent years. An experimental study on lapping ceramic balls with variable-radius groove was carried out. Taguchi method was used to design the orthogonal experiment of rough lapping, and the material removal rate ( MRR) and the roundness were selected as evaluation indicators. The signal to noise ratio (S/N) and the analysis of variance were used to analyze experimental results. The optimal parameters combination with load pressure of 2.5 N/Ball, abrasive concentration of 10 wt% and rotation speed of 15 rpm was obtained. During rough lapping, the maximum reduction rate of average roundness is 50%, the maximum reduction rate of roundness deviation is 81%, the MRR is 16.9 μm/h, and the reduction rate of variation of ball lot diameter ( VDWL) is 90%. After semi-lapping and polishing, the best surface roughness is up to 10 nm, the best roundness is 0.128 μm, and the VDWL is 0.24 μm. The surface roughness and VDWL of the five balls tested all meet the requirements of ceramic ball with G5 grade, and the roundness value is close to the requirement of G5. The variable-radius groove lapping method is very suitable for improving the precision of batch lapping for ceramic balls.

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“…However, its drawback is its requirement for a stirring device to change the ball-spin angle randomly for the achievement of an enveloped lapping trajectory [15]. Zhao et al [16] proposed a new method that can achieve high accuracy, high consistency, circular processing, and variable ballspin angle in one cycle by substituting the concentric Vgroove plate with variable-radius V-groove plate and using a recycler for balls. This technique has been successfully applied in steel ball processing.…”

Section: Introductionmentioning

confidence: 99%

“…However, only few studies on ceramic ball processing have been conducted using this new method. In this study, we draw on the method of Zhao et al [16] to develop a novel precision processing technique for ceramic balls. In our proposed method, a spiral V-groove plate is used to replace the concentric Vgroove plate.…”

Section: Introductionmentioning

confidence: 99%

Processing of high-precision ceramic balls with a spiral V-groove plate

Feng

Yuan

et al. 2017

Front. Mech. Eng.

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As the demand for high-performance bearings gradually increases, ceramic balls with excellent properties, such as high accuracy, high reliability, and high chemical durability used, are extensively used for highperformance bearings. In this study, a spiral V-groove plate method is employed in processing high-precision ceramic balls. After the kinematic analysis of the ball-spin angle and enveloped lapping trajectories, an experimental rig is constructed and experiments are conducted to confirm the feasibility of this method. Kinematic analysis results indicate that the method not only allows for the control of the ball-spin angle but also uniformly distributes the enveloped lapping trajectories over the entire ball surface. Experimental results demonstrate that the novel spiral Vgroove plate method performs better than the conventional concentric V-groove plate method in terms of roundness, surface roughness, diameter difference, and diameter decrease rate. Ceramic balls with a G3-level accuracy are achieved, and their typical roundness, minimum surface roughness, and diameter difference are 0.05, 0.0045, and 0.105 mm, respectively. These findings confirm that the proposed method can be applied to high-accuracy and high-consistency ceramic ball processing.

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A Novel Lapping Method for High Precision Balls Based on Variable-Radius V-Groove

Cited by 6 publications

References 4 publications

Polishing of Silicon Nitride Ceramic Balls by Clustered Magnetorheological Finish

Polishing of Silicon Nitride Ceramic Balls by Clustered Magnetorheological Finish

Experimental study on lapping ceramic balls with variable-radius groove plate

Processing of high-precision ceramic balls with a spiral V-groove plate

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