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. 2022 Aug 5;13(8):1263.
doi: 10.3390/mi13081263.

Clamping Fatigue Properties of Shrink-Fit Holder

Zhouyi Lai  1 , Zhenyu Zhao  1 , Ting Guo  1 , Yuyin Luo  2 , Houming Zhou  3 , Changan Li  3
Affiliations

Clamping Fatigue Properties of Shrink-Fit Holder

Zhouyi Lai et al. Micromachines (Basel). .

Abstract

In order to explore the clamping fatigue properties of shrink-fit holders, ANSYS software was used in this study to analyze the thermal and contact stresses during the clamping process of the shrink-fit holder, and the fatigue analysis was performed by selecting the dangerous areas based on the two stresses. A numerical control shrink-fit holder clamping fatigue test device was manufactured, and the automatic clamping of the shrink-fit holder was executed in this study. After 500 clamping repetitions, a milling test was carried out on the shrink-fit bracket. By collecting the vibration signal of the workpiece during processing and measuring the change in the surface roughness of the workpiece, and then analyzing the change in the machining performance of the shrink-fit holder under different clamping times, we were able to compare and verify the accuracy of the finite element fatigue analysis.

Keywords: clamping fatigue; contact stress; shrink-fit holder; thermal stress; time domain waveform.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Shrink-fit holder. (a) Material object; (b) structural diagram.
Figure 2
Figure 2
Finite element model of the shrink-fit holder and tool.
Figure 3
Figure 3
Steady-state temperature distribution diagram.
Figure 4
Figure 4
Thermal stress distribution diagram.
Figure 5
Figure 5
Contact stress distribution diagram.
Figure 6
Figure 6
Numerical control shrink-fit holder clamping fatigue test device.
Figure 7
Figure 7
Milling test device diagram. (a) Numerical control machining center; (b) sensor; (c) acquisition card.
Figure 8
Figure 8
Vibration waveform in the X direction of the workpiece at 8000 rpm. (a) After the initial clamping; and after (b) 1000, (c) 1500, (d) 2000, (e) 2500, (f) 3000, (g) 3500, and (h) 4000 clamping repetitions.
Figure 8
Figure 8
Vibration waveform in the X direction of the workpiece at 8000 rpm. (a) After the initial clamping; and after (b) 1000, (c) 1500, (d) 2000, (e) 2500, (f) 3000, (g) 3500, and (h) 4000 clamping repetitions.
Figure 9
Figure 9
Vibration spectrum in the X direction of the workpiece at 8000 rpm. (a) After the initial clamping; and after (b) 1000, (c) 1500, (d) 2000, (e) 2500, (f) 3000, (g) 3500, and (h) 4000 clamping repetitions.
Figure 9
Figure 9
Vibration spectrum in the X direction of the workpiece at 8000 rpm. (a) After the initial clamping; and after (b) 1000, (c) 1500, (d) 2000, (e) 2500, (f) 3000, (g) 3500, and (h) 4000 clamping repetitions.
Figure 10
Figure 10
Workpiece surface roughness.
Figure 11
Figure 11
Surface crack of shrink-fit holder.
See this image and copyright information in PMC

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