The stable operation of the 5-axis last CNC milling machine DC6070 relies on scientific maintenance. This article focuses on two key points: electric spindle lubrication period management and rotary table accuracy calibration, providing highly operable guides to help shoe mold manufacturing technicians avoid machining errors and equipment failures caused by negligence in maintenance, improve equipment lifespan and production efficiency, and serve as a core practical reference for ensuring high-precision last machining quality.
The electric spindle and rotary table are two core components of the 5-axis last CNC milling machine. The electric spindle provides high-speed rotation power, which is crucial for the cutting process. The rotary table enables multi - angle machining, greatly expanding the machining capabilities of the equipment. However, many operators often ignore some important maintenance details. For example, they may lubricate the electric spindle without following a reasonable schedule or fail to calibrate the rotary table regularly, which can lead to machining inaccuracies and equipment breakdowns.
The lubrication frequency of the electric spindle is mainly determined by the usage time and environmental temperature. Under normal working conditions (usage time of about 8 hours per day and an environmental temperature of 20 - 25°C), the lubrication should be carried out every 200 - 300 hours. If the usage time per day exceeds 12 hours or the environmental temperature is higher than 30°C, the lubrication interval should be shortened to 100 - 150 hours.
There are two main lubrication methods: automatic and manual. Automatic lubrication is more convenient and can ensure a more uniform lubrication effect. Manual lubrication requires operators to have a higher sense of responsibility. After lubrication, a comprehensive inspection should be carried out to ensure that the lubricant has reached all the necessary parts. The following is a lubrication cycle comparison chart:
| Usage Time per Day | Environmental Temperature | Lubrication Interval |
|---|---|---|
| ≤ 8 hours | 20 - 25°C | 200 - 300 hours |
| ＞ 12 hours | ＞ 30°C | 100 - 150 hours |
To ensure the accuracy of the rotary table, you can use a laser interferometer or a tool setter for detection. The detection process usually includes measuring the positioning accuracy, repeatability accuracy, etc. After the detection, if there is an error, corresponding calibration steps need to be taken. The error correction logic is based on the measured error values, adjusting the parameters of the control system to gradually reduce the error. For example, if the positioning error of the rotary table is found to be ±0.05°, the control system parameters can be adjusted to correct this error.
In a shoe mold manufacturing factory, due to the long - term omission of electric spindle lubrication and rotary table calibration, the produced shoe lasts had obvious contour deformation, especially in the heel area. The machining error exceeded the allowable range, resulting in a large number of defective products. To prevent such situations, you should strictly follow the maintenance guide, record the maintenance time and results, and conduct regular inspections.
"In my more than 10 years of work experience, I have seen many equipment failures caused by improper maintenance. Regular lubrication and calibration can really save a lot of trouble." - Experienced Engineer
Regular maintenance can significantly extend the service life of the equipment. According to statistics, a well - maintained DC6070 can have a service life extended by about 3 - 5 years compared with an equipment without proper maintenance. At the same time, it can also reduce the downtime of the equipment. Mastering these two key details can reduce the downtime of your DC6070 by 30%. High - efficiency production starts from accurate calibration.
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