刀具偏心跳动下侧铣硬脆材料的瞬时铣削力模型

doi:10.7527/S1000-6893.2023.28925

Abstract

Abstract:

Taking side milling machinable microcrystalline ceramics as object， an instantaneous overall milling force model was built. The instantaneous milling force of end milling cutter side edge milling was studied under the condition of tool eccentricity and runout. The instantaneous cutting thickness and area were obtained through the hypocycloidal motion between the milling tool and the workpiece. The optimal solution for tool eccentricity and eccentricity angle was determined through linear search method. The precise solution of the instantaneous milling force action point was obtained using a one-dimensional search algorithm and expressed as the instantaneous rotation angle under the condition of tool eccentricity and jumping. A new instantaneous milling force model was established based on the Martellotti model. The instantaneous milling force model coefficients were identified using the least squares method. And from the perspective of the milling force action point （instantaneous rotation angle）， the variation characteristics of instantaneous milling force were studied. The validation results of milling experiments indicate that the predicted values of the milling force model are in good agreement with the experimental values， with an average relative error not exceeding 8%. Therefore， the instantaneous milling force model demonstrates high prediction accuracy.

Key words: tool eccentricity and runout, instantaneous milling force model, instantaneous cutting area, action point of milling force, hard and brittle materials

CLC Number:

TH16

Lianjie MA, Wenhao DU, Zhen ZHAO, Zhe QIU. Instantaneous milling force model of side milling hard and brittle materials in the state of tool eccentricity and runout[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(4): 428925-428925.

Figures/Tables 16

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编号	径向切深 a_e/mm	进给速度 v_f/（mm·min^-1）	主轴转速 n/（r·min^-1）	轴向切深 a_p/mm
V1	0.2	350	5 000	4
V2	0.5	400	4 500	10
V3	0.4	450	3 000	6
V4	0.3	300	6 000	8

实验编号	F_x₁误差/%	F_x₂误差/%	F_x₃误差/%	平均误差/%
V1	8.33	5.78	2.15	5.42
V2	2.94	14.08	4.01	7.01

实验编号	F_y₁误差/%	F_y₂误差/%	F_y₃误差/%	平均误差/%
V1	10.36	4.57	1.17	5.37
V2	1.65	9.55	5.78	5.66

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Instantaneous milling force model of side milling hard and brittle materials in the state of tool eccentricity and runout

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