piercing heavy plate

[jimcolt]

Hypertherm Plasma systems are rated conservatively for piercing....and each system is a bit different depending on power level and torch design. Here are some rules:

Air Plasma with height control system:

Powermax45 1/2" pierce

Powermax65 5/8" pierce

Powermax85 3/4" pierce

Powermax1650 7/8" pierce

Oxygen Industrial Plasma

HSD130 1" pierce

HT2000 1.5" pierce

HPR130 1" pierce

HPR260 1.5" pierce

HPR400 2" pierce

HPR800 up to 4" pierce on stainless and aluminum


Time for piercing.....approximately 1 second per inch of thickness.


Jim Colt Hypertherm

Originally Posted by xt300301nut What is the model of the plasma? What per the torch manual is the piercing capacity of the torch. There are very few plasmas rated to pierce above 1" material. Are you able to do "running pierce"? This allows the torch to move away from the molten puddle caused by the pierce. Are you using auto height. Typically auto-height is shut off during pierces of thicker materials and manual height control is required by the operator.

[m230042]

To make the servoed cutting oxygen regulator, we used a separate pilot regulator, and made a replacement "dome" top to replace the normal tee handled spring pressure part of the oxygen regulator. The pre-regulator was set to the desired pressure, and its output taken over to the servoed regulator. A needle valve was placed in the line conveying the pre reg pressure to the dome to essentially delay the pressure buildup and thus the final cut oxygen pressure.

This will work only if there is not a torch select solinoid on the cut oxygen line. If so then a means of blowing down the manifold to 0 psi is needed before it will ramp up again.

Koike puts the cut o2 solinoids on top of the torch as to reduce the pause time after cutting o2 is turned off and the move to the next part. Otherwise you have to delay at the end of the cut to allow the manifold to bleed through the tip. if you try and move the torch to the next pierce it will nick the part as the end of the cut is still at kindeling temp.

[WSS]

Originally Posted by m230042 To make the servoed cutting oxygen regulator, we used a separate pilot regulator, and made a replacement "dome" top to replace the normal tee handled spring pressure part of the oxygen regulator. The pre-regulator was set to the desired pressure, and its output taken over to the servoed regulator. A needle valve was placed in the line conveying the pre reg pressure to the dome to essentially delay the pressure buildup and thus the final cut oxygen pressure. This will work only if there is not a torch select solinoid on the cut oxygen line. If so then a means of blowing down the manifold to 0 psi is needed before it will ramp up again. Koike puts the cut o2 solinoids on top of the torch as to reduce the pause time after cutting o2 is turned off and the move to the next part. Otherwise you have to delay at the end of the cut to allow the manifold to bleed through the tip. if you try and move the torch to the next pierce it will nick the part as the end of the cut is still at kindeling temp.

Yes, a dump of the dome pressure is needed to "reset". Putting a valve close to the torch does help with postflow quite a bit.

WSS