Automated depowdering is a comparatively new self-discipline in additive manufacturing and nonetheless: since Solukon was based and the world’s first depowdering system, the SFM-AT800-S, was launched in 2015, quite a few profitable rules have turn into established in the marketplace. An important of those embrace:
- Depowdering should happen in a protected ambiance – Well being dangers from fantastic mud and the hazard of explosions are successfully managed solely when utilizing a sealed course of chamber. For reactive supplies, the method chamber is inerted with a protecting gasoline.
- Depowdering have to be reproducible – This implies attaining constant cleansing outcomes for equivalent parts (i.e., repeatability). What could sound apparent or like a no brainer is definitely an ordinary that may solely actually be maintained with automated powder removing utilizing Solukon.
- The most effective cleansing result’s achieved by means of the mix of rotation and vibration excitation – Countless rotation round two axes and focused vibration excitation make the adhering powder flowable inside inside channels. The excitation depth of the vibrator could be adjusted in Solukon’s powder removing methods. Nevertheless, how the pneumatically generated vibrations really act on the half is very particular person and depends upon the geometry of the element. What issues is the consequence: the powder behaves like a liquid and flows out of inside channels. Powder clumps are damaged up by a high-frequency knocker, which may also be activated when wanted.
Till just lately, the mix of a pneumatic vibrator and a knocker to stimulate vibration would have been on this checklist of fundamental rules for depowdering. It is because pneumatic vibrators are dependable, cost-effective and extremely environment friendly. Nevertheless, they eat massive quantities of compressed air and are tough to manage, which might result in issues with delicate components. It is because exceeding the resonance frequency may injury the components in delicate constructions.
With the introduction of the E model of the SFM-AT350 depowdering system, Solukon has due to this fact expanded the toolbox of excitations and introduced a system with ultrasonic excitation onto the market. The SFM-AT350-E depowders parts up to 400 x 400 x 400 mm and 100 kg totally routinely with programmable 2-axis rotation and frequency excitation within the ultrasonic vary.
What can ultrasonic excitation do, and what are its key benefits?
Within the SFM-AT350-E, the element is worked up at ultrasonic frequencies utilizing a piezoelectric system. The excitation is utilized straight on the turntable of the automated depowdering system, permitting the element to be introduced effortlessly and exactly into an optimum vibration state.
What makes this method distinctive is that as an alternative of utilizing a set frequency, the system repeatedly and quickly sweeps by means of a particular frequency vary through which cleansing is especially efficient. This sweeping ensures extremely dependable cleansing by using well-defined frequencies throughout the ultrasonic vary.
The ultra-high frequencies used for electrical excitation are nicely above the element’s probably damaging pure resonance frequency. This prevents the element from resonating and eliminates the danger of structural injury. Consequently, ultrasonic depowdering is an particularly mild type of cleansing.
One other benefit: ultrasonic excitation is totally silent. This permits the SFM-AT350-E to be put in even exterior noisy, high-throughput manufacturing environments.
When is ultrasound the suitable type of excitation?
As with many challenges associated to powder removing, selecting between pneumatic and ultrasonic excitation largely depends upon the particular software and the geometry of the element. Each strategies can ship efficient cleansing outcomes. Nevertheless, ultrasound is usually the popular choice for components with extraordinarily delicate options or fragile help constructions, because it avoids the oscillations usually related to pneumatic excitation—significantly lowering the danger of element injury from vibrational stress. Even very fantastic constructions (usually lower than 0.5 mm in diameter) reply exceptionally nicely to high-frequency ultrasonic excitation.
As well as, powder can turn into clogged in slender and deep channels if the excitation just isn’t utilized appropriately. Ultrasonic excitation is able to reliably cleansing such channels and might even dislodge present blockages.
The next comparative check carried out by a Solukon buyer highlights some great benefits of ultrasonic expertise in cleansing slender and lengthy channels:
What particular use circumstances are there?
Swiss m4m: Depowdering of medical components
The SFM-AT350-E has confirmed to be a great system for the medical trade particularly. Typical purposes listed below are hip cups, which have a grid-like construction on the floor. Such acetabular cups, along with spinal inserts and dental instruments, have been a part of a construct job on the Swiss m4m Heart, a expertise switch middle for the medical and dental trade.
It took simply 7.5 minutes to wash the stainless steel medical parts within the SFM-AT350-E with ultrasonic excitation.
The Exploration Firm: Depowdering of a Thruster Combustion Chamber of a rocket engine
The ultrasonic expertise of the SFM-AT350-E has additionally already confirmed itself within the aerospace trade, the place significantly excessive calls for are positioned on industrial depowdering. The worldwide aerospace firm “The Exploration Firm” depends on ultrasonic excitation with the SFM-AT350-E from Solukon for the depowdering of rocket components.
This combustion chamber product of Inconel (IN718) weighs round 15 kg, is round 370 mm excessive and has a extremely complicated inside: the intricate channels are as much as 400 mm lengthy, and the smallest diameter of those channels is 1.5 mm.
With the SFM-AT350-E, the group led by Senior Additive Manufacturing Engineer Maxi Strixner was in a position to clear the element comfortably, gently and silently. For the focused cleansing of the rocket combustion chamber, the group ran a cleansing program specifically written for the element. After half-hour, the element was efficiently cleaned.
For the Exploration Firm, the silent cleansing and the dependable cleansing high quality are the principle explanation why they selected the SFM-AT350-E from Solukon:
“The Solukon ultrasonic depowdering system has been a game-changer for our small workshop. Its quiet design means we are able to run it proper subsequent to our workspace with none disruption — which is a giant plus. When used with a program, the system drastically cuts down on guide labor, and delivers constant, clear outcomes. All of this interprets into actual time and value financial savings, making the funding completely worthwhile,” says Boris Schaff, Additive Manufacturing Engineer at The Exploration Firm.
Ultrasonic expertise as a brand new software within the powder removing toolbox
Because the examples present, the ultrasonic expertise of the SFM-AT350-E has already confirmed itself in the marketplace. And nonetheless: the E-version is in no way a substitute for the SFM-AT350’s customary depowdering expertise with pneumatic excitation. Ultrasonic excitation is fairly a further software within the toolbox of automated depowdering.
SFM-AT350-E Fast Details
– Depowdering system with ultrasonic excitation
– For components as much as 400 x 400 x 400 mm and 100 kg
– Noiseless depowdering
– Low compressed air consumption
– Mild cleansing
Head to the Solukon web site for extra info.