1 Introduction

High efficiency deep grinding (HEDG) can achieve high material removal rate while maintaining good surface integrity of the workpiece. HEDG offers the possibility of obtaining high material removal rate while maintaining good surface integrity of the workpiece. HEDG usually adopts high grinding wheel speed (up to 250m/s), AG feed speed and deep cutting (for example,1–8mm), and the introduction of super abrasive such as cubic boron nitride (CBN) is helpful to further reduce the heat distribution of the workpiece and prolong the service life of the grinding wheel [1–7]. Generally, HEDG adopts high wheel speed (up to 250 m/s). AG speed, deep cutting (such as 1-8 mm) and the use of superhard abrasives (such as cubic boron nitride and CNB) are helpful to further reduce the heat distribution of the workpiece and prolong the service life of the grinding wheel 1-7.

The distribution of grinding heat on different radiators (workpiece, grinding wheel, grinding fluid and grinding chips) varies with the process conditions, and it is a control factor when designing grinding process, so as to work in a safe range without causing any thermal damage to the workpiece. The distribution of grinding heat to different heated objects (workpiece, grinding wheel, grinding fluid and grinding chips) varies with machining conditions, which is the control factor in designing grinding process, so that it can work in a safe and secure state without causing thermal damage to the workpiece. Due to the unique heat transfer mechanism related to HEDG's high Pekert number (Pe) and large contact angle, a large amount of grinding heat can be taken away by debris [2–7], and due to the unique heat transfer mechanism related to HEDG's high Pekert number and large contact angle, a large amount of grinding heat can be taken away by debris by 2–7. This is usually negligible in traditional fine grinding and slow feed grinding. The grinding temperature of the finishing surface may be much lower than that of the grinding wheel-workpiece contact surface for the following reasons.

This is usually ignored in traditional fine grinding and slow feed grinding. Due to the relatively small thermal penetration depth in the workpiece and the continuous removal of grinding debris, the grinding temperature on the machined surface can be much lower than that on the machined contact surface of the grinding wheel.

* Correspondent: Department of Manufacturing Systems, Cranfield University, Bedfordshire, UK.

Correspondent: Department of Manufacturing Systems, Cranfield University, OAL MK43, Bedford, UK.

E-mail: t.jin@cranfield.ac.uk

E-mail: t.jin@cranfield.ac.uk

Relatively small thermal penetration depth in the workpiece and continuous removal of abrasive debris. Due to the relatively small thermal penetration depth in the workpiece and the continuously removed abrasive debris,