Acceptance standard of the hottest CNC lathe

2022-08-15
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Acceptance standard for CNC lathes

the acceptance of CNC lathes should be carried out in accordance with the technical requirements for manufacturing and acceptance of CNC horizontal lathes promulgated and implemented by the state, mainly manifested in:

1 Unpacking acceptance

check the items in the box one by one according to the random packing list and the list of specific attachments in the contract. And make inspection records. There are the following contents:

whether the packing box is intact, and whether the appearance of the machine tool is obviously damaged, which is rust and paint peeling

whether there is technical data and whether it is complete

type, specification and quantity of accessories

type, specification and quantity of spare parts

tool variety, specification and quantity

type, specification and quantity of cutter < blade >

installation accessories

variety, specification and quantity of electrical components

2. Start up test

after the installation and commissioning of the machine tool, notify the manufacturer to send someone to debug the machine tool. The tests are mainly 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. carry out function test on the machine tool with keys, switches and manual operation. The flexibility, stability and functional reliability of the test action

b. select any kind of spindle speed for continuous test of spindle start, forward rotation, reverse rotation and stop. The operation shall not be less than 7 times

c. spindle high, medium and low speed transformation test. The tolerance between the command value and the displayed value of the speed is ± 5%

d. select any feed rate, and conduct continuous working feed and rapid feed tests on the whole travel of XZ axis. The fast travel should be greater than 1/2 of the full travel. The positive and negative side and continuous operation shall not be less than 7 times

e. on the whole stroke of X and Z axes in the middle and late 1980s, low, medium and high feed rate transformation tests were carried out, and the reduction of iron content in insulation materials was taken as the key work of quality management. Turret tool rest was used for various transposition clamping tests

f. the hydraulic, lubrication and cooling systems shall be tested for sealing, lubrication and cooling to ensure no leakage

g. the chuck shall be tested for clamping, loosening, flexibility and reliability

h. the spindle shall be tested for forward rotation, reverse rotation, stop and change of spindle speed

i. the turret tool rest shall be subject to positive and negative rotation test

j. the feeding mechanism shall conduct the transformation test of low, medium and high feed rate as rapid feed

k. test the reliability and flexibility of functions such as feed coordinate overtravel, manual data input, position display, back to base point, program serial number instruction and retrieval, program pause, program deletion, address line interpolation, linear cutting loss, taper cutting cycle, thread cutting cycle, arc cutting cycle, tool position compensation, pitch compensation, gap compensation, etc

3) idle running test

a. the operation test of the active mechanism shall not be less than 1 hour in the maximum speed section, and the temperature value of the main shaft bearing shall not exceed 70 ℃, and the temperature rise value shall not exceed 40 ℃

b. for continuous idling test, the exercise time shall not be less than 8 hours, and each cycle time shall not be more than 15 minutes. Stop at the end of each cycle, and simulate the action of loose card workpiece. Stop for no more than one minute, and then continue to operate

4) load test

users prepare drawings and blanks of typical parts, program and input programs under the guidance of debugging personnel of the manufacturer, and select cutting tools and cutting parameters. The load test can be carried out in the following three steps: rough turning, heavy cutting and fine turning. Each step is divided into single cutting and cyclic program cutting. After each cutting, check the actual size of the machined part and compare it with the command value to check the operation accuracy of the machine tool under load, that is, the machine arranges staff to solve the comprehensive machining accuracy of the machine and the rotation accuracy of the turret tool rest as soon as possible at the customer's site

3. Acceptance

the price of domestic ore in the later stage of the machine tool will still be driven by fluctuating operation. After the completion of unpacking acceptance, function test, idling test and load test, the qualified products can be processed, and the acceptance and handover procedures can be handled. If there is any problem, the manufacturer shall be responsible for solving it

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