How to maintain CNC machining?

How to maintain CNC machining?

1. Daily maintenance

Before starting the CNC machining, check whether the liquid level in the lubricating oil tank is below the very low interface; If it is below the very low interface, add lubricating oil to the specified interface before starting the CNC machining. After the CNC machining is powered on, check if the control equipment of the machine tool is abnormal; If there are abnormalities, they must be eliminated before using CNC machining. After starting the CNC machining, the spindle should rotate for more than 15 minutes to achieve thermal balance before cutting. If there is any abnormal noise during the use of CNC machining, the machine should be stopped in a timely manner, and the fault should be eliminated before reuse. Before stopping at noon every day, move the large support plate to the CNC machining tailstock, sweep the chips on the lathe guide rail into the chip accumulation box of the lathe, clean the hygiene around the lathe, count and inspect the items in the toolbox according to regulations, and adjust the quantity and performance of measuring tools and other items before cutting off the power. Before shutting down in the afternoon every day, move the large support plate onto the CNC machining tailstock and clean the hygiene on and around the machine tool. Count the items in the toolbox according to regulations, and check the quantity and performance of measuring tools, tools, and other items. Only when the plates are neatly arranged can the power be cut off.

2. Weekly maintenance

Check whether the liquid level of the CNC machining lubrication oil tank meets the specified requirements, and check the lubrication effect of the lubricating oil. Check the ventilation efficiency of the cooling fan and clean the ventilation filter. Check if the machine tool control buttons are abnormal, and replace damaged buttons in a timely manner. Check the performance of the machine tool holder, especially whether the bottom surface of the tool fixing screw is a rounded surface, and correct it in a timely manner. Check the performance of the machine tool tailstock and make timely corrections. If it does not work for a long time, it should be powered on every 7 days, and the electrical components and CNC system should be powered on for 2-3 hours to drive away the moisture inside the electrical cabinet and charge the battery.

Reasonable selection of cutting tools:

When rough turning, cutting tools with high strength and good durability should be selected to meet the requirements of large feed back and large feed during rough turning.

When precision machining, choose high-precision and durable cutting tools to ensure the required machining accuracy.

3. In order to reduce tool changing time and facilitate tool alignment, machine clamp knives and machine clamp blades should be used as much as possible.

Reasonable selection of fixtures:

1. Try to use universal fixtures to clamp the workpiece and avoid using specialized fixtures;

2. The alignment of part positioning benchmarks reduces positioning errors.

The CNC machining path refers to the movement trajectory and direction of the tool relative to the part during the machining process of the CNC machine tool.

1. It should meet the requirements of machining accuracy and surface roughness;

2. The processing route should be shortened as much as possible to reduce the idle travel time of the tool.

At present, in the situation where CNC machining has not yet reached universal use, the excess allowance on the blank, especially the allowance containing forged and cast hard leather, should be arranged on a regular lathe. If CNC machining is required, pay attention to the flexible arrangement of the program.

The connection between the hydraulic chuck and the hydraulic clamping cylinder is achieved through a pull rod. The key points for clamping the hydraulic chuck are as follows: first, remove the nut on the hydraulic cylinder by hand, remove the wire pipe, pull it out from the rear end of the spindle, and then remove the chuck fixing screw by hand.

Precision machining