Standard compressed air consumption of CNC cars

The standard compressed air consumption of CNC lathes (CNC machine tools) varies depending on the equipment configuration, process requirements and production beats, the reference gas consumption of a single CNC machine tool is usually between 0.3m & sup3;/min and 1.5m & sup3;/min the specific needs to be based on equipment function, process requirements and production rhythm comprehensive measurement. The following is a detailed description of the benchmark usage of a single device, the multi-machine linkage calculation model, the incremental requirements of special processes and the system optimization strategy:

1. baseline usage of a single piece of equipment

1. basic functional gas

   • spindle cooling: continuous gas supply is required, and the typical dosage is 0.1-0.3m & sup3;/min (floating according to spindle power).
   • Tool magazine change: Single action consumes 0.5-1.5m & sup3;, the frequency depends on the processing beat.
   • Protective curtain purging: General configuration 0.05-0.1m & sup3;/min continuous gas supply.

2. Auxiliary process gas

   • workpiece blowing chip: When the air pressure is 0.5-0.7MPa, a single air gun consumes 0.2-0.4m & sup3;/min.
   • Fixture cleaning: The automatic production line shall be equipped with pulse purging system, and the instantaneous flow rate can reach 1.2m & sup3;/min.
   • precision positioning: Pneumatic chuck/guide rail needs 0.3-0.6m & sup3;/min stable air supply.

Computational model of 2. multi-machine linkage

1. synchronous coefficient method

   • formula: Total demand = & Sigma; single benchmark usage × synchronization coefficient.
   • Description: The synchronization coefficient is taken according to the automation degree of the production line, 0.6-0.8 for manual line and 0.8-1.0 for flexible line.
   • Example: 5 machining centers (single benchmark 1.2m & sup3;/min) form FMS system, total demand = 5 × 1.2 × 0.9=5.4m & sup3;/min.

2. peak superposition method

   • applicable Scenarios: There are working conditions in which multiple devices perform high-pressure processes at the same time.
   • Calculation steps: Identify the maximum instantaneous gas consumption of each equipment (e. g. tool change + chip blowing superposition), and add 20% safety margin according to the weighted calculation of simultaneous use probability.

Incremental demand for 3. special processes

1. high speed machining center

   • spindle bearing air seal: 0.15-0.25m & sup3;/min clean air (oil content <0.01 mg/m & sup3;) is required.
   • Linear motor cooling: additional 0.5-0.8m & sup3;/min dry air.

2. five-axis machine tool

   • rotary axis brake: 0.3-0.5m & sup3;/min emergency air supply is required.
   • optical detection: Air bearing needs 0.2m & sup3;/min constant pressure air supply.

4. system optimization strategy

1. gas tank configuration

   • capacity selection: Configure according to 15%-20% of the total demand, for example, 6m & sup3;/min system is recommended to configure 1.2m & sup3; gas storage tank.
   • Layout Points: Close to the peak gas equipment installation, shorten the pipeline response time.

2. Pressure belt optimization

   • graded gas supply: Set the system pressure to 0.7MPa, and install a pressure reducing valve at the terminal to 0.5MPa (chip blowing station).
   • energy saving benefit: For every 0.1MPa reduction in pressure, energy consumption decreases by about 7%.

3. Leak Management

   • test standard: The total leakage shall be <5% of the total air supply.
   • Rectification measures: The annual leakage of 1mm diameter leak point (at 0.6MPa) reaches 18000 m & sup3;, it is recommended to carry out ultrasonic leak detection every quarter, focusing on quick plug connectors and solenoid valve groups.