@air
2025-04-11
Air pressure and flow specifications required by industrial machine tool equipment
The air pressure and flow requirements of industrial machine tool equipment vary greatly depending on equipment types, functions and working conditions. The following are specific specification analyses and suggestions:
1. Air pressure specifications
- conventional range
- 6-8 bar（87-116 psi）: Suitable for most machine tool pneumatic systems (such as cylinders, clamps, rotary tables).
- special needs：
- high pressure tool(Such as some fixtures, spray guns): required 10-12 bar（145-174 psi）。
- precision control(e.g. optical lens processing): may require 5 bar（72.5 psi） Below low pressure.
- industry differences
- Automobile stamping line: Large punches can reach air pressure 10 bar above.
- 3C electronic processing: Commonly used micro component assembly equipment 4-6 bar Low pressure.
2. Flow specifications
-
By equipment type
device type Flow demand (L/min) remarks Small CNC machine tools 50-200 Including tool clamping, chip removal and other actions Machining center (multi-axis linkage) 300-800 Cooling requirements for multiple cylinders and spindle laser cutting machine 100-400 Auxiliary gas (requires a separate gas source) hydraulic puncher Instant>1000 High peak flow, requires air storage tank Electric spark forming machine 80-150 Electrode replacement and chip removal -
Key points of flow calculation
- formula: Total flow = sum of the flows of each pneumatic element × simultaneous action coefficient (usually 1.2-1.5).
- example: A machine tool with 3 cylinders (each requires 100 L/min), the flow rate required when operating at the same time 3×100×1.5 = 450 L/min。
3. Key selection suggestions
- Gas storage tank configuration
- Capacity = average flow × 6-10 seconds (for instantaneous peaks).
- cases: 800 L/min demand → Air storage tank selection 40-60 L。
- Air compressor matching
- Power = (flow × pressure) / (efficiency × 0.9)(unit conversion needs to be unified).
- cases: Requires 600 L/min@7 bar → Air compressor power approximately 7.5 kW。
- air quality requirements
- precision machining: A freeze dryer (-40℃ dew point) and a 0.01μm filter are required.
- general processing: The pressure dew point can reach +2℃.
4. Special needs of the industry
- medical device processing: Requires oil-free compressed air (Class 1 standard).
- titanium alloy processing: Need high temperature resistant air pipes (resistant to above 120℃).
- automatic production line: Redundant design is recommended to avoid shutdown of the main air compressor + standby machine.
It is recommended to conduct accurate calculations based on the list of pneumatic components in the machine tool manual, combined with standards such as “GB/T 3811-2008 Crane Design Code” or “ISO 1219-2:2012 Compressed Air Systems”. For complex systems, you can contact the air compressor manufacturer to provide customized selection solutions.
