Grinding methods can be divided into cylindrical grinding, internal grinding, centerless grinding, surface grinding, form grinding, gear grinding, thread grinding, east-west grinding, general lathe surface grinding, etc. With the development of NC technology, CNC grinding method plays an increasingly important role in grinding.
CNC grinder can process some special parts (such as axis parts with special curve, special-shaped parts with more than three coordinate requirements, mold, etc.) which cannot be processed on general grinder. Therefore, it is used to machining parts in a wide range. In order to maximize the economic benefits of CNC grinding machine, the following processing objects can be given priority.
（1） The parts put into production repeatedly have better benefit
The use of CNC grinding machine process preparation time occupies a higher share. For example, preparation of process analysis, programming, adjustment and trial cutting of the first part of parts.
The sum of these inductive working hours is often dozens to hundreds of times of the working hours of a single part. However, the operation contents of the NC lathe (such as special general lathe fixtures, process documents, programs, etc.) can be saved and used repeatedly. Therefore, when a part is successfully trial produced on a CNC grinder and put into production repeatedly, the production cycle is greatly reduced, and the cost is also less, which can achieve better results Economic benefits.
（2） It is required to guarantee the processing quality and produce the key parts in medium and small batches with high efficiency
Controlled grinding machine can realize high precision, high quality and high efficiency grinding under the control of computer. Compared with special grinding machine, it can save a lot of special process equipment, and has strong flexible manufacturing ability and good economic benefits.
Compared with the general grinding machine, it can remove many artificial disturbing factors in the long process of disorderly processing, and has good accuracy consistency and interchangeability, and high processing efficiency.
（3） The processing batch of parts should be greater than that of general grinder
When NC grinding machine is used to process medium and small batch parts, due to various reasons, the pure cutting time only accounts for 10% – 30% of the actual working hours. When machining on the CNC grinding machine of grinding center, which is a kind of multi process convergence, this share may rise to 70% – 80%, but the preparation adjustment time is often much longer, so the parts batch size will become uneconomical.
（4） The processed parts should fit in with the process characteristics of CNC grinding machine with multi process convergence
When CNC grinding machine is used to process parts, the condition of grinding wheel cutting workpiece is completely the same as that of corresponding non CNC grinding machine, but it can carry out some complex machining with machining accuracy requirements. For example, in the grinding range, the general grinder is mainly used for grinding the end face of cylindrical surface, conical surface or stepped shoulder.
In addition, CNC cylindrical grinder can also grind toroidal surface (including convex and concave surface), as well as the above various forms of disordered combined surface.
（5） Balance of inductive processing capability of parts
As a single CNC grinding machine, it is difficult to complete all the processing contents of a part, and it needs to transfer and cooperate with the processing procedures of other equipment, so it has the requirements of production rhythm and workshop production capacity balance.
Therefore, it is necessary to give full play to the processing characteristics of CNC grinding machine, and reasonably organize matching balance process on other processing equipment.
（6） Some special parts processing considerations
Although the processing batch of some parts is very small, ordinary lathes have disordered shapes, high quality and good interchangeability, which can not meet the above requirements on non CNC grinding machines, and can only be organized to be processed on CNC grinding machines, such as parabola, cycloid cam and special reflector mirror
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