Taikan Encyclopedia |​ What to Pay Attention to When Accepting a CNC Horizontal Turning Lathe?

During the acceptance process of a CNC horizontal turning lathe, ensuring that the machine's quality and functions meet the requirements is crucial. The acceptance process involves not only verifying the machine's appearance and technical documentation but also performing detailed tests on its functions and performance. Through a series of unpacking inspections, operational tests, and load tests, the working condition and machining precision of the lathe can be thoroughly evaluated, ensuring it operates stably and efficiently. This article will discuss key points to focus on during the acceptance of a horizontal CNC lathe machine, including unpacking inspection, machine startup test, idle running test, and load test.

Unpacking Inspection

The contents inside the package should be checked one by one according to the packing list and the specific accessories list in the contract. The inspection records should include the following items:

• Whether the packaging is intact and if the lathe's appearance shows any obvious damage such as rust or paint peeling.

• Whether the technical documentation is complete.

• The variety, specifications, and quantity of accessories.

• The variety, specifications, and quantity of spare parts.

• The variety, specifications, and quantity of tools.

• The variety, specifications, and quantity of cutting tools (blades).

• Installation accessories.

• The variety, specifications, and quantity of electrical components.

Machine Startup Test

After the horizontal CNC lathe machine is installed and debugged, the manufacturer should send personnel to test the machine. The tests mainly include:

• Manual Operation Test: To test the accuracy of manual operation.

• Jog Test: To check the response and functionality during jogging.

• Spindle Speed Change Test: To ensure the spindle speed change works properly.

• Overtravel Test: To ensure the machine does not exceed its travel limits.

  
  

Idle Running Test

The test of the machine's moving mechanisms should run for no less than 1 hour at the highest speed range. The spindle bearing temperature should not exceed 70°C, with the temperature rise not exceeding 40°C.

A continuous idle running test should also be performed for no less than 8 hours. The cycle time should not exceed 15 minutes. At the end of each cycle, the machine should stop, simulate unloading the workpiece, and the stop time should not exceed one minute before continuing operation.

Load Test

The user should prepare typical part drawings and blanks. Under the guidance of the manufacturer's debugging personnel, the user will program the machine, select cutting tools, and determine cutting parameters. The load test should be carried out in three steps: rough turning, heavy cutting, and finish turning. Each step should include single cutting and cycle program cutting. After each cutting operation, check the actual dimensions of the processed part and compare them with the specified values to verify the CNC horizontal turning lathe's running accuracy under load conditions, which includes the machine's overall machining precision and turret indexing precision.

Acceptance

Once the horizontal CNC lathe machine passes the unpacking inspection, functional test, idle running test, and load test, and produces qualified products, the acceptance handover process can be carried out. If any issues arise, the manufacturer should be responsible for resolving them.