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In order to improve the grindability of titanium alloys, the inhibition of chemical affinity between abrasives and titanium alloys and cooling enhancement in grinding zone are carried out in this paper. Slotted electroplated CBN grinding wheels with optimum topography are used, and different grinding fluid supply systems such as conventional tangential spraying coolant supply, inner chamber coolant jet impingement, radial high-pressure coolant jet impingment are employed in creep feed deep grinding experiments on titanium alloy (TC4). The experimental results show that high-pressure jet impingement has remarkable cooling effect. The temperature of the workpiece surface can be steadily kept below the critical film boiling temperature 120~130°C, while the workpiece surfaces is badly burnt with conventional coolant supply. The study will exploit an important research orientation that has great potential in high efficiency grinding. Further perfection of this study will not only enable us to increase the available material removal rate to a new level but also solve the workpiece burn problem of the difficult-to-machining materials in high efficiency grinding.In order to improve the grindability of titanium alloys, the inhibition of chemical affinity between abrasives and titanium alloys and cooling enhancement in grinding zone are carried out in this paper. Slotted electroplated CBN grinding wheels with optimum topography are used, and different grinding fluid supply systems such as conventional tangential spraying coolant supply, inner chamber coolant jet impingement, radial high-pressure coolant jet impingment are employed in creep feed deep grinding experiments on titanium alloy (TC4). The experimental results show that high-pressure jet impingement has remarkable cooling effect. The temperature of the workpiece surface can be steadily kept below the critical film boiling temperature 120~130°C, while the workpiece surfaces is badly burnt with conventional coolant supply. The study will exploit an important research orientation that has great potential in high efficiency grinding. Further perfection of this study will not only enable us to increase the available material removal rate to a new level but also solve the workpiece burn problem of the difficult-to-machining materials in high efficiency grinding.

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Carbon fibre-reinforced plastic (CFRP) composites have been widely used in the field of aerospace and transportation because of their excellent mechanical properties. However, excessive tool clogging commonly occurs because of low chip storage space, thereby leading to workpiece failure. The slot grinding experiments with and without ultrasonic vibration were performed by using abrasive tools with defined grain pattern to improve tool life. The mathematical model of the fibre cutting angle in ultrasonic vibration-assisted slot grinding (USG) was established. The influences of ultrasonic vibration on the grinding force, tool clogging and surface integrity of unidirectional CFPR were discussed quantitatively. Results show that the USG featured lower grinding force, shorter fibre chip and better surface integrity than the conventional slot grinding (CSG). In addition, the lowest and highest reduction rates of grinding forces are obtained by using the fibre orientation of 90° and 135°, respectively. The maximum fibre chip lengths produced in USG are approximately 78% and 66% lower than those in CSG with fibre orientations of 0° and 90°, respectively. Several adhesive chips are observed on the USG tool surface. The chip storage spaces in CSG are filled with adhesive chips. The USG has a positive influence on surface roughness and damage because of the changes in fibre cutting angle. Compared with CSG, the USG produces similar fibre fracture patterns, except at the fibre orientation of 0°. Furthermore, the surface defects in USG are lower than those in CSG.

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[38] investigated the edge chipping of monocrystalline silicon in ultra-micro-slot-grinding (UMSG) on 100 μm scale, and the results shown that the size of edge ...

Precision grinding requires the hardest minerals and the tightest tolerances ... slots, integrated cooling holes, passages and channels. Learn more · Threaded ...

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