Handling
General / Basic aspects
The HiFIT device is pneumatically operated and requires a compressed-air supply 6 up to 8 bar and an air volume at least 400 l/min. Acc. to the calibration the peening frequency will be between 180 and 300 Hz. The intensity will be adapted to the material to be treated by means of a special adjustment mechanism (not via the supply pressure!). A direct measurement of the impact intensity is integrated in the device. The intensity of the single impact is recorded and can be read via a serial interface that is obtainable as an accessory to the HiFIT device (order No. 231786 HiFIT data interface, page 8). This permits on the one hand adjusting and calibrating of the device for the each case and on the other hand and the continuous monitoring and tracking of the peening process.
Execution of the HiFIT treatment
The high-frequency peening process – like the welding work – ranks among the "special processes". For this, the requirements
- to the manufacturer
- to the end user company
- to the qualification of the staff
must be complied with. The following description is not a substitute for staff training.
Course of the action:
- The impact intensity of the HiFIT device is to be calibrated acc. to the material and to the pressure of the air supply prior to use.
- The calibration is to be checked by means of a specimen, and to be corrected, if necessary.
For the optimal effectiveness the device must
- be used with an angle = 60° up to 80° with regard to the basic material (see Fig. 3) and with an angle = 70° up to 90° in the direction of movement (see Fig. 4);
- be guided with a speed = 3 up to 5 mm/s along the weld.
