In machining, the selection of an appropriate processing method depends primarily on the workpiece's shape, dimensions, material type, and production requirements. Common machining methods include turning, milling, drilling, and grinding, each with its own specific scope of application. For instance, turning is suitable for rotationally symmetrical workpieces, milling is ideal for machining complex flat or curved surfaces, while grinding is best suited for precision machining. When selecting a processing method, it is also necessary to consider the complexity of the process and production efficiency.

During the machining process, surface quality issues are a common challenge, typically stemming from improper processing parameters, tool wear, or equipment malfunctions. To mitigate these problems, one can optimize processing parameters—such as cutting speed, feed rate, and cutting depth—regularly replace tools to ensure they remain sharp, and utilize appropriate lubricants to minimize friction, thereby ensuring a flat and smooth machined surface. Furthermore, selecting a suitable process plan and utilizing appropriate work-holding fixtures also contributes to enhancing surface quality.

Tool wear is a common issue in machining that directly impacts processing precision and surface quality. To control tool wear, the first step is to select tools that are suitable for the specific material and machining conditions, and to regularly inspect the condition of the tools. If severe wear is detected, the tool should be replaced immediately. Furthermore, optimizing cutting parameters, utilizing appropriate coolants or lubricants, and regularly clearing away chips can help minimize tool wear. Proper tool management and maintenance can significantly extend tool lifespan and enhance production efficiency.

Ensuring machining precision is the cornerstone of mechanical processing, typically achieved through the use of precision equipment and rigorous process controls. A fundamental prerequisite is guaranteeing the accuracy and stability of machine tools; this entails regular inspection and calibration to maintain the equipment in optimal condition. Furthermore, key measures for ensuring machining precision include the judicious selection of cutting parameters, the use of high-quality cutting tools and fixtures, and enhanced operator training to ensure the accuracy of every step in the operation.

In machining operations, workpiece deformation is primarily caused by factors such as the uneven release of internal stresses during processing and excessive cutting forces. To mitigate deformation, effective process planning—such as adopting multi-step machining or pre-removing a portion of the material—can be employed to reduce the material removal depth per pass. Furthermore, during the machining process, it is essential to ensure the stability of the fixturing and the precise positioning of the workpiece, while utilizing appropriate cutting parameters to avoid generating excessive cutting forces. For workpieces requiring high precision, the application of coolant to facilitate proper cooling also contributes to minimizing thermal deformation.

Cutting fluid is an indispensable auxiliary material in machining operations, primarily serving to provide cooling and lubrication in order to enhance processing efficiency, extend tool life, and improve the quality of the machined surface. When selecting a cutting fluid, it is essential to choose an appropriate type—such as water-soluble or oil-based fluids—based on the workpiece material, the specific machining method, and the process requirements. Controlling the concentration and temperature of the cutting fluid is also critically important, and these parameters should be adjusted according to actual machining conditions. Furthermore, the cleanliness of the cutting fluid and its replacement schedule must be monitored regularly to ensure the maintenance of optimal performance.