We are still facing many issues with NGC side window frames in bending.
I have received the 2 samples NGC side window clamp rings for 668PP005.
On the first sample production clamp ring it is still not fitting over the frame in the corners. Please refer to attached presentation at the last 2 pages.
The second clamp ring where you shortened the frame at the back stop end ”by 5mm” it still does not fit around each of the 4 corners over the inner frames. This frame is even worse than the current production frame that was sent. It does not even drop into the frame check jig we have here. It will not fit over the corners of the inner frames, and the gap between the ends is too great.
I suggest you need to look at
- Firstly on the inner frame 668PQ005. It would appear the pressure and clamp die pressure is not enough against the bend die when setting the machine and the inner lip is rolling inwards too much this has the effect of not allowing the outer clamp ring to sit over it. To me this seems to be worse now, than when we started production at ARB. Please have a look at the master 668PQ005 inner frame I signed off and compare the frames using a straight edge across the inside face of the bend and measure them as well as increase the pressure between the dies.
- I suggest once again using both the drawing of 668PP005 clamp rings and the master inner frame 668PQ005, but place 5mm packers in each corner sitting on the master inner frame, sit new 668PP005 clamp rings onto the packers on top of the master frame and ensure the outer clamp rings fit over the 4 corners of the inner frames, then establish what needs to be done to frame length again to provide a gap between the ends and send another sample with knowledge that the holes need to also match to the check jig windows.
Alex, I really recommend you go back to Garry’s book for original programs for 668PP005 and 668PQ005 and the pop out window inner frame as well. Trial and look at results to include the distances he sets on clamp and pressure die settings to the bend tool distance.