Metal precision machinery parts processing surface appear uneven stripes phenomenon solutions in the process of metal precision parts
processing, machine tool feed rate is very low in cutting back turning and larger, the cutting tool relative to the workpiece surface will appear intermittently or it fast when the slow speed of uneven phenomenon, embodied in the workpiece vibration or beat phenomenon, can cause precision machinery parts processing surface appear obvious uneven stripes, surface roughness increases, especially for metal precision parts processing, the surface of the parts quality and overall strength will be severely affected.
Serious when even will cause the scrap parts.
How to prevent this kind of phenomenon?
Comprehensive Xavier16 years of experience in precision machining
, this problem, the main is to improve the friction between workpiece and tool features, increase the stiffness of the whole system, increase the system damping and reduce the machining load, etc.
Specific can take the following measures: 1.
With suitable cutting tool and workpiece materials, in view of the different metal precision parts processing and material selection of suitable cutting tools, make the mutual friction of tool workpiece system and make the cutting tool and workpiece movement as long as the difference of the coefficient of friction is small.
Increase performance better performance of cutting fluid, good cutting fluid can improve the friction properties of cutting tools and precision parts.
Adopt let bead screw instead of the common thread screw, replace the boundary with liquid friction or dry friction, the use of special lubricating oil and so on, by improving the friction performance of the machine tool driving system to improve the sensitivity of feed system, reducing the occurrence of metal precision parts processing vibration phenomenon.
The increase of the stiffness in the system: improve the stiffness of the entire process, can effectively reduce the occurrence of this phenomenon is 5.
Reduce cutter extend the length of the tool post, bold the handle, the increase of the stiffness in the rest 6.
Reduce the length to diameter ratio artifacts, use the middle bracket, such as center frame to increase rigidity of workpiece 7.
Appropriate bold feed mechanism of the diameter of the lead screw transmission, shorten the length of the screw, etc. , to improve the rigidity of transmission feed mechanism, as far as possible eliminate the feed mechanism of the clearance between the transmission components in, sexual transmission for feed mechanism, improve the stiffness of machine tool transmission system.
Increase the system damping, increase the damping system, can choose bigger damping material to do the thing, can also be additional high damping materials on the parts or entering the damping, etc. , to reduce the vibration.
Can reduce the machining load: by reducing back turning, reduce weight of the transmission parts, reduce the machining load, improve the machining precision metal parts of the vibration phenomenon.
In the process of metal precision parts processing, when the feed speed is low, vibration phenomenon, must immediately stop, analysis the reasons of the phenomenon, targeted to take effective measures to eliminate this kind of phenomenon, to ensure normal processing.
The above information is derived from the shenzhen Xavier precision machining manufacturer company.
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