Failures and causes of CNC turning aluminum parts manufacturing

When using CNC machine tools to process aluminum parts, if you want to make the CNC turned aluminum parts more stable, you must pay attention to such places.

Here is the content list:

l Gnawing knife

l Incorrect pitch

l Incorrect pitch diameter

Gnawing knife

Failure analysis and solutions: The reason is that the turning tool is installed too high or too low, the CNC turning aluminum parts are not clamped firmly or the turning tool is worn too much.

1. If the turning tool is installed too high or too low or too high, when the tool is driven to a certain depth, the flank face of the turning tool will withstand the CNC turning aluminum parts, increasing the friction force, and even bending the CNC turning aluminum parts. The phenomenon of gnawing the tool; if it is too low, the chips will not be easily discharged. The radial force of the turning tool is the center of the CNC turning aluminum. In addition, the gap between the traversing screw and the nut is too large, resulting in the continuous and automatic deepening of the depth of the tool, thus turning the CNC The turned aluminum piece was lifted, and a bit of a knife appeared. At this time, the height of the turning tool should be adjusted in time to make the tip of the tool the same height as the axis of the CNC turning aluminum part (the tip of the tailstock can be used for tool setting). During rough turning and semi-finish turning of CNC turning aluminum parts, the position of the tooltip is about 1% D higher than the center of CNC turning aluminum parts.

2. The workpiece clamping of CNC turning aluminum parts is not firm. The rigidity of CNC turning aluminum parts cannot withstand the cutting force during turning, which produces excessive deflection, which changes the center height of the turning tool and CNC turning aluminum parts (the workpiece is lifted). High), resulting in a sudden increase in cutting depth and tool gnawing. At this time, the CNC turning aluminum parts should be clamped firmly, and the tailstock center can be used to increase the rigidity of CNC turning aluminum parts.

Incorrect pitch

Failure analysis and solutions: 1. The full length of the thread of CNC turning aluminum parts is incorrect. The reason is the improper matching of the change gear or the wrong position of the feed box handle. You can recheck the feed box handle position.

2. Partially incorrect The reason is due to the partial pitch error of the screw of CNC turning aluminum parts (generally caused by wear), the screw can be replaced or partially repaired. The slub pattern of CNC turning aluminum parts is caused by periodic errors in the gear transmission from the spindle to the lead screw. The gears with errors or wear can be repaired.

Incorrect pitch diameter

Failure analysis and solution: The reason is that the knife used to make CNC turning aluminum parts is too large, the dial is inaccurate, and the measurement is not performed in time. The solution is to check in detail whether the dial is loose when finishing turning, the finishing allowance must be appropriate, the cutting edge of the turning tool for CNC turning aluminum parts must be sharp, and it must be measured in time.

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