Cutting parameters of end mills in the processing of packaging machinery parts

In the processing of packaging machinery parts, the cutting parameters of end mills need to be optimized according to the part material, tool type and processing requirements. The following are the specific parameters and analysis:

Spindle speed setting:

Aluminum alloy: It is recommended that the spindle speed be around 3500rpm. For example, for end mills with diameters ranging from 0.5mm to 4mm, the speed can be set at 3500rpm to balance cutting efficiency and tool life.

Stainless steel and cast iron: The rotational speed should be appropriately reduced. The recommended rotational speed for stainless steel processing is 50-100m/min (converted to rpm, it needs to be adjusted according to the tool diameter). For cast iron processing, the rotational speed can be referred to below 3500rpm. The specific speed should be combined with the tool material and cutting depth.

Feed rate control

Aluminum alloy: The feed rate is recommended to be 0.1-0.2mm per tooth. For example, for a 2mm diameter end mill, the feed rate can be set to 1600mm/min (calculated when each tooth feeds 0.2mm and the spindle speed is 3500rpm).

Stainless steel and cast iron: The feed rate should be controlled at 0.05-0.1mm per tooth. The specific parameters need to be adjusted in combination with the tool diameter and workpiece hardness. For example, when processing stainless steel, the feed rate can be appropriately reduced to below 500mm/min.

Cutting depth management

Rough machining: It is recommended that the single cutting depth does not exceed 50% of the tool diameter. For example, for a 4mm diameter end mill, the rough machining cutting depth can be controlled within 2mm.

Finish machining: The cutting allowance should be controlled within 0.05-0.1mm to ensure dimensional accuracy and surface quality. For instance, during finish machining, multiple cuts should be carried out, with each cutting depth not exceeding 0.1mm.

Special process treatment:

Thin-walled part processing: By adopting a parameter combination of small cutting depth, high rotational speed and low feed rate, and in combination with vacuum adsorption clamping method, the cutting force is reduced to avoid workpiece deformation.

Large allowance removal: Select end mills with larger diameters and shorter lengths. During heavy cutting, avoid tool vibration or tool skew, and at least limit the vibration and skew to the minimum extent.