Commissioning and acceptance of CNC lathes

The acceptance of CNC lathes should be carried out in accordance with the "Technical Requirements for the Manufacturing and Acceptance of CNC Horizontal Lathes" promulgated and implemented by the country. During the acceptance process, if disputes occur, they should be resolved through consultations based on relevant national standards.

1. Unpacking acceptance

Check the items in the box one by one according to the random packing list and the specific attachment list in the contract. And make inspection records. Has the following content: Whether the packing box is intact, whether the appearance of the machine tool is obviously damaged, it is rust, peeling paint; Whether there is technical information and whether it is complete; Types, specifications and quantities of accessories; Variety, specification and quantity of spare parts; Tool variety, specification and quantity; Types, specifications and quantities of knives (blades); Installation accessories; Variety, specification and quantity of electrical components;

2. Startup test

After the machine is installed and debugged, the manufacturer will be notified to send someone to debug the machine. The main tests are as follows:

1) Various manual tests a. Manual operation test Test the accuracy of manual operation. b. Jog test c. Spindle shift test d. Overtravel test

2) Function test a. Use buttons, switches, and manual operations to perform functional tests on the machine tool. The flexibility, stability and functional reliability of the test action. b. Choose any spindle speed for continuous test of spindle start, forward rotation, reverse rotation and stop. No less than 7 operations. c. Spindle high, medium and low speed conversion test. The tolerance between the command value and the displayed value of the speed is ±5%. d. Choose a feed amount, and continuously do work feed and rapid feed tests on the entire XZ axis stroke. The rapid stroke should be greater than 1/2 full stroke. The positive and negative side and continuous operation shall not be less than 7 times. e. Perform low, medium and high feed rate conversion tests on all strokes of X and Z axes. The turret tool post performs various indexing clamping tests. f. The hydraulic, lubrication, and cooling systems are tested for sealing, lubrication, and cooling to ensure no leakage. g. The chuck is tested for clamping, loosening, flexibility and reliability. h. The spindle is tested for forward rotation, reverse rotation, stop and change of spindle speed. i. The turret tool post performs a forward and reverse rotation test. j. The feed mechanism is tested for rapid feed conversion for low, medium and high feed. k. Test feed coordinate overtravel, manual data input, position display, reference point return, program serial number indication and retrieval, program pause, program deletion, address line interpolation, linear cutting wandering, taper cutting cycle, thread cutting cycle, circle Reliability and flexibility of functions such as arc cutting cycle, tool position compensation, pitch compensation, clearance compensation, etc.

3) Idling test a. The running test of the active mechanism should not be less than 1 hour in the highest speed range, the temperature value of the spindle bearing should not exceed 70℃, and the temperature rise value should not exceed 40℃; b. Continuous dry running test, the exercise time is not less than 8 hours, and each cycle time is not more than 15 minutes. Stop at the end of each cycle and simulate the movement of the loosened workpiece. Stop for no more than one minute before continuing to run.

4) Load test The user prepares the drawings and blanks of typical parts, and programs and enters the program under the guidance of the debugger of the manufacturer to select the cutting tool and cutting amount. The load test can be carried out in the following three steps: rough turning, heavy cutting and finishing turning. Each step is divided into single cutting and cycle program cutting. After each cutting is completed, the actual size of the processed part of the part is checked and compared with the command value, and the running accuracy of the machine tool under load conditions, that is, the overall machining accuracy of the machine tool, and the indexing accuracy of the turret tool post are checked.

3. Acceptance

After the machine tool is unpacked for acceptance, functional test, dry running test, and load test, if qualified products are processed, the acceptance and transfer procedures can be handled. If there is any problem, the manufacturer shall be responsible for solving it.