What are the cutting parameters of a grinding machine?

The cutting parameters of the milling machine mainly include the following aspects:

I. Primary Cutting Parameters

1. Cutting Speed (Vc)

• Definition: The major cutting speed of the cutting edge relative to the workpiece, typically expressed in meters per minute (m/min).
• Impact: Cutting speed directly affects cutting heat, cutting force, and surface roughness. Excessive cutting speed may lead to increased cutting heat, workpiece deformation, and reduced surface quality; insufficient cutting speed can decrease processing efficiency.

1. Feed Rate (F)

• Definition: The feed rate of the tool relative to the workpiece over a unit of time, typically expressed in millimeters per minute (mm/min) or millimeters per revolution (mm/r).
• The effect: Feeding speed determines the thickness of the cutting layer and the magnitude of the cutting force. Excessive feeding speed may lead to increased cutting force and decreased surface quality of the workpiece; while too slow feeding speed may prolong the processing time.

1. Cutting Depth (ap)

• Definition: The size of the cutting layer perpendicular to the cutting edge, typically expressed in millimeters (mm).
• The impact: The cutting depth determines the contact area between the cutting edge and the workpiece as well as the size of the cutting force. Excessive cutting depth can lead to increased surface roughness of the workpiece and even cracking; insufficient cutting depth may reduce processing efficiency.

II. Other Relevant Parameters

1. Every-tooth Feed Rate (AF or FZ)

• Definition: The relative displacement between the workpiece and the milling cutter per tooth rotation, typically expressed in millimeters per tooth (mm/z).
• The effect: The feed rate per tooth directly affects cutting force and heat. An excessively high feed rate per tooth can lead to a dramatic increase in cutting force, exacerbating tool wear; conversely, an excessively low feed rate per tooth may reduce processing efficiency.

1. Spindle Speed (n)

• Definition: The rotational speed of the milling spindle is typically expressed in revolutions per minute (r/min).
• The spindle speed is closely related to the cutting speed, affecting cutting heat, cutting force, and surface roughness. Both excessively high or low spindle speeds can adversely impact the quality of the machining.

1. Tool Diameter (dd)

• Definition: The diameter size of a milling cutter, typically expressed in millimeters (mm).
• The effect: The diameter of the cutting tool affects the contact area between the cutting edge and the workpiece, as well as the magnitude of the cutting force. Choosing the appropriate tool diameter helps to improve processing efficiency and surface quality.

Section 3: Principles of Parameter Selection

1. Select according to material characteristicsDifferent materials exhibit varying properties such as hardness, toughness, and thermal conductivity, necessitating the selection of appropriate cutting parameters to ensure machining quality and efficiency.
2. Select Machining Centers Based on PerformanceMachine tool power, rigidity, and precision limit the range of cutting parameters selection. When selecting cutting parameters, ensure that the machine tool can withstand the load of the chosen parameters.
3. Select according to processing requirementsDifferent requirements for processing precision, surface roughness, and efficiency necessitate selecting appropriate cutting parameters to meet processing demands.

In summary, the cutting parameters of the milling machine include cutting speed, feed rate, cutting depth, feed per tooth, spindle speed, and tool diameter, among others. When selecting these parameters, it is necessary to consider factors such as material characteristics, machine tool performance, and processing requirements.