직진도는 어떻게 잡나요? ZERO TAPPER!!

[김상경]

워터젯 가공의 한계!

두꺼워지면 질수록 테파가 너무 진다!!

( 절단면의 위, 아래가 너무 차이난다!!)

이러한 것을 해결하기 위하여 OMAX는  Tilt-A-Jet^? 이란 선택사양 장치가 있다.

어떤 재질이든지 50mm 까지는 상하 단차(테퍼량)을 0.1mm까지 잡을 수 있는 장치입다.
              

Tilt-A-Jet^?

Tilt-A-Jet (TAJ) represents the latest OMAX innovation in the continuing search for more accurate abrasivejet machining. Tilt-A-Jet lets the OMAX JetMachining Center achieve virtually zero taper with most materials.

As the machining nozzle moves along the tool path, Make calculates the amount of taper,

and then tilts the machining head to exactly offset the taper from the abrasivejet.

Taper doesn't disappear, it just gets moved to the scrap part of the material,

leaving your part with exactly square edges.

노즐을 나온 물줄기가 퍼지지 않을 방법은 물리적으로 없다.

그럼, 어떻게 하면 물줄기 방향을 바꿀수 있을까?

노즐 자체를 일정한 각도로 돌리면 어떻게 될까? (위 그림중 아랫 그림)

Tilt-A-Jet adjusts the nozzle so that all the taper is in the scrap

Tilt-A-Jet can be retrofitted to any OMAX machine, bringing precise machining to all JetMachining System owners. Tilt-A-Jet has no wear parts, requires no maintenance, and consumes no supplies. There is a small additional electrical draw for the servo motors, but this is negligible.



  ( The Tilt-A-Jet machining head )

How it works
The easiest way to understand how the Tilt-A-Jet works is to consider a simpler case:

a nozzle with only two pivots. The following illustration shows how, by using two linkages on either side,

 the tip of the nozzle can be tilted to different angles. The Tilt-A-Jet uses the same concept extended to three pivots, allowing the nozzle head to tilt in all three dimensions.





Two-dimensional simplified version of nozzle tip pivot, showing two positions

Although this seems simple, the advantage to this solution is that it does not move the nozzle up or down

by a large amount. You can easily imagine tilting the nozzle, but with most approaches,

 the nozzle moves up or down by a lot. This, of course, affects the taper and increases the risk of the nozzle running into the material.

The nozzle must also move in the X/Y plane to compensate for the entry point into the material.

With the Tilt-A-Jet, the amount of X, Y, and Z motion required to compensate for the tilt is minimized to small distances, allowing for rapid tilting speeds and accelerations. Some X,Y and Z motion is still required,

and Make handles all of that for you automatically.

This is why when you use "Preview to Screen" you may see the XY motion drift away from the path.

The nozzle is following the correct path, but the XY motion is moving slightly to compensate.

All the adjustments to the angle of the nozzle are made automatically by the Make software.

소프트웨어로 노즐의 각도를 9도까지 기울여서 절단할수 있다.

이 장치를 사용하면, 빠릉 속도를 내면서 직진도를 보장하면서 절단을 할수 있다.

(OMAX 특허)

 

[김상경]

속도를 낮추어야 합니다. 틸팅 장치는 정상적인 절단 속도를 내면서 직진도를 잡아줍니다. sus20t 기준으로 보면 표준속도가 100mm입니다. 아마도 60정도면 조도가 좋을 걸로 생각됩니다.

[김상경]

직진도를 잡아주는 것이 워터젯의 생명입니다. 이제까지 그게 힘들어서 모두들 싫어했지요. 기피했구요.