| 1. |
- Tong, Xin, et al.
(author)
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Optimising milled titanium alloy concave surface quality with micro-textured ball-end milling cutters
- 2021
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In: International Journal of Manufacturing Research. - : Inderscience Publishers. - 1750-0591. ; 16:2, s. 122-134
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Journal article (peer-reviewed)abstract
- The cutting speed at the lowest point of a ball-end milling cutter is zero, which results in poor workpiece surface quality and serious cutter wear. To alleviate this problem, a micro-texture can be processed on the rake face of a ball-end milling cutter to provide an anti-friction and anti-wear mechanism. The objective of the work reported here is to reduce cutter wear and optimise workpiece surface quality. By using a mathematical model of row spacing to analyse the differential geometric relationship between cutters and surfaces at their contact point, we have been able to obtain optimal cutter orientation. This was verified by simulating concave surface machining. Experiments were then conducted to verify the approach and the results showed that when the cutter orientation is adjusted to its optimum, the surface quality of the workpiece processed by a micro-textured ball-end milling cutter is at its best. [Submitted 10 May 2018; Accepted 28 July 2019]
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| 2. |
- Yang, Shucai, et al.
(author)
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A novel method of experimental evaluation on BTA tool geometries
- 2017
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In: The International Journal of Advanced Manufacturing Technology. - : Springer London. - 0268-3768 .- 1433-3015. ; 91:9-12, s. 4253-4261
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Journal article (peer-reviewed)abstract
- Towards the problem of closed space of Boring and Trepanning Association (BTA) drill, this paper presents a novel experimental method to evaluate BTA tool geometries, and a turning-based test is conducted to simulate drilling. The three inserts of BTA drill are replaced by the three turning inserts, the rotation of BTA drill is transformed by workpiece rotation in turning, the feed of BTA drill changes into the feed of turning inserts, and the cutting area per BTA insert is simulated by the cutting depth in turning. To implement the approach, three angles, consisting of edge inclination, flank angle and edge declination, are organised by a three-factor and three-level Taguchi experiment for each BTA insert, e.g. outside insert, centre insert and middle insert. Cutting force, chip patterns and chip curl radius are observed and measured to evaluate the insert geometries.
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| 3. |
- Yang, Shucai, et al.
(author)
-
The guide block structure design of boring and trepanning association (BTA) deep hole drilling
- 2018
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In: The International Journal of Advanced Manufacturing Technology. - : SPRINGER LONDON LTD. - 0268-3768 .- 1433-3015. ; 99:1-4, s. 911-918
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Journal article (peer-reviewed)abstract
- In the process of boring and trepanning association (BTA) deep hole drilling, the guide block plays the role of guiding, balancing the cutting force and extruding and polishing the machined surface. In this paper, the trapezoidal guide block and the spiral guide block are designed on the basis of ordinary guide block. With simulation and experiment, the cutting force, cutting vibration, and cutting temperature of guide blocks of different shapes during drilling process have been analyzed. When the spiral guide block deep hole drilling is compared with ordinary and trapezoidal guide blocks, it ensures effective cutting performance of BTA deep hole drilling. It also improves the quality of machined surface of the workpiece, reduces the tool wear, and forms stable chips.
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