Using abrasive water jet for micromachining requires the highest possible accuracy. One of the problems that need to be overcome are vibrations of the sample. When cutting using identical or similar settings of the abrasive water jet, one might learn to know what to expect from the results. However, having a model predicting the vibrations based on the parameters and the structure of the machine would be more desirable. Models taking the parameters into account already exist, but none of them include settings that are unchangeable on the respective machine. These include the direction of the cutting relative to the ribs, the isolation of the machine from external conditions and the fixing of the arm with the cutting head. Experiments were performed on different workplaces with different conditions using the same relative traverse speeds derived from the respective settings of parameters. Results show that the isolation of the machine does not affect the results noticeably. The fixing of the arm at only one point reduces the amplitude of sample vibrations but it might increase the vibrations of the cutting head. Results for the direction of the cutting show mixed results so more research should be conducted.

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Relation of the AWJ Machine Construction and the Amplitude of Vibrations Measured on the Sample

  • Jakub Gřunděl,
  • Libor M. Hlaváč,
  • Petr Pětroš

摘要

Using abrasive water jet for micromachining requires the highest possible accuracy. One of the problems that need to be overcome are vibrations of the sample. When cutting using identical or similar settings of the abrasive water jet, one might learn to know what to expect from the results. However, having a model predicting the vibrations based on the parameters and the structure of the machine would be more desirable. Models taking the parameters into account already exist, but none of them include settings that are unchangeable on the respective machine. These include the direction of the cutting relative to the ribs, the isolation of the machine from external conditions and the fixing of the arm with the cutting head. Experiments were performed on different workplaces with different conditions using the same relative traverse speeds derived from the respective settings of parameters. Results show that the isolation of the machine does not affect the results noticeably. The fixing of the arm at only one point reduces the amplitude of sample vibrations but it might increase the vibrations of the cutting head. Results for the direction of the cutting show mixed results so more research should be conducted.