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In Quantity 29 Subject 5 of TCT Journal, Stefanie Brickwede – Head of Additive Manufacturing at Deutsche Bahn and Managing Director of Mobility goes Additive (MGA) – talked to TCT about functions of 3D printing expertise contained in the rail business.
Throughout that dialog, Brickwede talked about that a number of firms within the sector had moved past utilising the expertise for prototyping and are actually deploying it for functions reminiscent of tooling and spare elements. That caught the eye of Professor Phill Dickens who, by means of his function at Added Scientific, has been working with an organization who’re mentioned to be offered on the idea of utilizing 3D printing for spare elements, although he’s starting to have doubts over its suitability.
On the most recent Additive Perception Innovators on Innovators podcast, Brickwede and Dickens share insights and experiences across the topic of 3D printed spare elements, earlier than happening to debate the usage of additive manufacturing in different industries for different functions.
Under, now we have the total transcript of the pair’s trade.
PD: So, let me simply provide you with a little bit of background about myself first, Stefanie. I obtained into, I assume what was speedy prototyping – In actual fact, it wasn’t even speedy prototyping – in 1990. After which shortly, we switched to making elements by speedy prototyping, which we then known as speedy manufacturing, however that was a little bit of the unsuitable identify, actually. And it switched to additive manufacturing. And so, we arrange Added Scientific about six years in the past now. And that primarily does work for different firms when it comes to supplies and course of growth, but it surely does some modelling and a few consulting and so forth, and a few coaching.
During the last, I assume, three, 4 years, we have achieved a couple of initiatives, spare elements utilizing additive manufacturing. And this was for one specific shopper who was very, very eager on the idea of utilizing additive manufacturing of spare elements. And I assume it got here to the final venture we did, the place I began to grow to be very uncertain about the advantages of utilizing additive manufacturing of their state of affairs. And the explanation for that was once we checked out their elements, most of them had been metallic and most of them had been fairly previous elements. So, they’d been made a while in the past in lots of conditions. And a lot of the metallic elements had been both castings or they had been machined elements. And so, I may perceive utilizing additive manufacturing to make the sand moulds or the patterns for funding casting and so forth, however for the elements that had been initially machined, [for] virtually all of them it might be a lot simpler to only go and machine them once more, relatively than utilizing additive manufacturing. They did have one problem and that was they did not have any CAD fashions. In actual fact, virtually all the time, they did not even know what the fabric was aside from say metal. In order that that was about nearly as good because it obtained. So, they’d no design info in any respect when it comes to tolerances or materials specification or warmth remedy or something like that. So, really the largest job of all was, for those who like, reverse engineering within the widest sense. So, what the half could be, capturing the geometry is the straightforward bit, understanding design the brand new half was a lot harder. And so, in some respects making the half was the straightforward bit and once we checked out most of their elements, virtually all of them might be machined on CNC machining fairly simply. Or for the castings, make a sample or a sand mould after which make a casting and machine it and there was just a few elements that we noticed that made sense for additive manufacturing, just a few p.c, or if there was a plastic half the place you needed to keep away from going into tooling.
That was my motive for beginning to doubt whether or not additive manufacturing was the best factor to do in that state of affairs. So, I assumed it might be actually helpful to have this dialogue with your self who’s obtained a number of expertise on this space. And try to perceive the place does it make sense to make additive manufacturing and perceive what you’ve got been doing with it. In order that’s, for those who like, the background.
SB: Thanks Phill. I come from the rail business initially. And so, I am now within the rail business for greater than 20 years and we began with additive manufacturing precisely six years in the past. And once we began that, we had been determining what can we do with additive manufacturing. I work for Deutsche Bahn, which is among the greatest railway firms in Europe. And it isn’t a constructive firm, it is a maintainer, it is an operator of trains.
What you simply described is precisely the idea we had once we began. And we focus instantly on printing spare elements, since speedy prototypes are usually not one thing we eager about, as a result of we do not design something, hardly something. So, for this reason we targeted on spare elements. And for those who take a better take a look at the rail business, you can find out that now we have a number of very new trains, however we even have a number of very previous trains, which implies they’re even older than I’m. And in that case, you may’t discover any spare elements anymore. So, if you wish to have a look on spare elements, and also you want some, often you will not discover any suppliers. In the event you discover the previous suppliers, they do not have the moulds anymore. Have they got printable designs? Nope. So, you all the time begin from the start. It is precisely what you described. And infrequently we do not even know what sort of materials, intimately, they used. So, that is one thing now we have to seek out out. It is quite simple. Though the method will not be all the time easy, however this was our start line. And the primary elements we printed, these had been little hook hangers and naturally, they need to fulfil some design points, you may’t simply take any, you want the particular one, which inserts into this particular prepare. And that was the very begin. And really quickly afterwards, we additionally printed the primary metallic elements. And also you’re completely proper, coming to the purpose that printing metallic elements, it isn’t all the time an financial case, not less than not for those who evaluate the previous applied sciences with additive manufacturing. However then you definitely want some for the information and particulars, that is the subsequent problem.
However that is what we do now for greater than six years. And within the meantime, we have printed at Deutsche Bahn the place I come from greater than 30,000 elements for a lot of, many various use instances all through the railway firm, together with infrastructure and in addition stations, however the primary elements coming from the trains.
PD: So, for the metallic elements, then, what kind of elements are you making?
SB: After all, we began with a bit less complicated polymer elements however within the meantime, we have printed a number of metallic elements too. However to be sincere, it is perhaps 20% of the general numbers. However metallic is so attention-grabbing as a result of if you wish to stop the nonetheless stand of trains so with regards to an financial attention-grabbing level, then often we’re speaking not about polymer elements, we’re speaking about metallic elements. And we printed these from totally different supplies. The primary elements had been aluminium, then we printed an element which is named a staircase, I will clarify instantly what it means, from titanium, as a result of then we discovered that titanium, from a printing facet, is cheaper than printing metal, since you do not want the machine so long as for the metal materials, so we discovered so much.
In the meantime, we have additionally printed utilizing wire arc additive manufacturing or DED, direct vitality deposition, additionally huge metal elements, 27 kilogramme security related elements for a high-speed prepare, and that wire arc additive manufacturing half, it is a very heavy one as I simply described, that stops the prepare from getting an excessive amount of into the [inaudible]. So, this positively is a security related half. After which we examined that half from each testing methodology you may consider. So we, after all, achieved a destroy testing, we put it into a pc tomography and did so much. So now we all know for certain that it completely is on a comparable foundation with the earlier expertise in that case, it was a moulded half.
PD: I can perceive the wire arc course of for among the huge elements, as a result of as I perceive it, the lead time on huge billets of metallic will be extraordinarily lengthy. And so, for instance, the blokes at Cranfield WAAM have been doing wire as much as make some huge preforms that are then machined. So, was that the motivation for that then when it comes to the lead time of the uncooked materials, for those who’d have gone the machining route?
SB: The motivation was positively the lead time facet as a result of now we have an enormous procurement organisation inside the company. And people colleagues instructed us we will not get our fingers on these elements anymore. They screened the worldwide markets already. And since we all the time want a really, very small variety of such elements, generally simply from lot dimension one, then they requested us, may you please assist us as a result of our suppliers instructed us it can take not less than 9 months to get the half once more? And 9 months for a prepare which prices 13 million euros, you may think about that is some huge cash. And so, this was actually attention-grabbing to us.
After all, within the meantime, we have additionally achieved smaller elements from SLM expertise, we used a really broad vary of various applied sciences. And the optimistic facet is that now we have a really broad number of elements, and we do not have to do them ourselves. So, for those who ought to ask me, what number of machines do you have got? Hardly any. So, we do that with printing service bureaus, so we are able to focus completely on the use case, which is admittedly enjoyable, you do not have to deal with the machines. And everyone knows, and also you’re positively an skilled of this expertise, you are one of many very outstanding dinosaurs, that often for those who needed to place a machine into your upkeep websites, you’ll need not less than one 12 months to have it operating the best way you need it to. So that is additionally one of many factors why we determined proper from the start, we do not need to deal with the machines, we need to deal with the use instances. And since we needed to do that, we additionally wanted an entire community of AM suppliers and for this reason we based MGA which stand for Mobility Goes Additive, that is a community and I even have the good pleasure to be the Managing Director of that community. And there we strive to usher in all of the expertise from totally different customers machining producers, materials suppliers, software program firms, and good Institute’s from universities to place collectively our information and to reinforce the variety of printable elements.
PD: We talked about earlier on concerning the design and specification. So, whenever you’ve obtained an previous half, who then does all that design work to say, that is what the specification of what you’re going to make ought to be?
SB: After all, it all the time relies upon a bit on the half. However often now we have to re-engineer the half, so now we have an engineering firm inside the company, however we often additionally rely to a really excessive quantity on unbiased engineering bureaus. They usually all the time assist us to seek out the design. And what I actually admire is that you simply now have so many younger software program firms who do that design for additive and in addition re-engineering for additive. Typically they use personal sources, generally they offer it to Indian sources [for example], however you have got a number of serving to fingers in the entire provide chain who provide help to to fulfil these concepts and to materialise these elements you need to print.
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PD: With the shopper, we had it appeared to me like – we did not measure this – but it surely appeared just like the amount of cash spent in all that re-engineering could be way more than making the half, is that true do you assume or not?
SB: Yeah, in the intervening time, it is, from my expertise, completely proper. I need to admit, at that time, I am not an engineer. So I am a educated economist. So I’ve a number of fantasy to think about future developments and completely satisfied that we now have to begin. And in the meantime, we are going to discover methods additionally to usher in synthetic intelligence into the AM provide chain, that sooner or later, we are going to simply be able to re-engineering elements. So I consider within the Star Trek logic, you have got slightly machine like a microwave, you set your half in there and it scans, and the subsequent machine proper subsequent door, you may print it out. And this, after all, will take one other 10 years, however it will positively be the longer term. And we now have to begin and we now need to get our fingers on the applied sciences. And because the customers, we actually have to handle what our wants are. That is one thing we found. So there are such a lot of good firms on the market who’re actually consultants in additive manufacturing, however generally they do not actually know what the customers need to fulfil; which supplies they want, what sort of designs they take into consideration. So it is essential to bridge the hole between these two ends of the availability chain.
PD: So whenever you’re these metallic elements, and so for instance, the aluminium elements you talked about earlier than, who decides whether or not to go down the additive manufacturing route or the machining route or the casting route? Who makes that call?
SB: And often, our procurement colleagues have already tried to seek out out whether or not there are any alternate options. So, then our colleagues from the upkeep facet come to us. After all, generally we determine, from an financial perspective, it is not likely price printing this half as a result of additive will not be low cost. It is not a really low cost expertise. So generally it is sensible to make use of different applied sciences however then we even have a terrific community for these different applied sciences to handle them for small portions of elements and to assist out. However yeah, who decides that? That was your query. It is my crew and I.
PD: Simply going again to the design points, then. So, do you have got any CAD fashions for any of those elements or is it utterly unavailable?
SB: Nope [laughs], it is completely unavailable. And generally we even speak about elements. You realize for those who’re in such a terrific company, so my company has greater than 300,000 workers, is energetic in a whole bunch of nations and so forth. So often you do not have these information and figures you want to depend on. And that was additionally our drawback proper from the start. As a result of once we began with additive manufacturing, we did this in a strategic, high down strategy. We need to shake our SAP methods and need to do an evaluation what sort of elements are printable? However the issue is that we did not have that information which can be utilized to do that determination. So we turned it the other way up. We did a backside up strategy. After which we began a roadshow by means of our upkeep websites and talked to our colleagues. And that is actually attention-grabbing, as a result of that is very related in lots of, many various sectors, then begins an enormous change administration venture. Additive Manufacturing in an organization or a company will not be a expertise venture. It is a change administration venture. And the very first thing you need to do is that you need to persuade your colleagues, that it is a expertise you may depend on. And that was actually useful once we printed our first metallic elements, then individuals actually touched it. It is such a haptic expertise, that is one of many huge benefits. They usually mentioned, ‘Oh, wow, if we are able to do a terminal field in aluminium, if we are able to do a sensor produced from titanium, then we are able to do almost something.’ And so that is what actually helped in convincing our colleagues and serving to to push the boundaries. However as you simply talked about your buyer, did they expertise one thing related?
PD: They have not obtained wherever close to so far as you’ve got obtained. So, it is nonetheless largely on the speaking stage and little or no on the appearing stage. They’re utterly offered on the idea. So, I am certain my doubts had no impact on them in any respect [laughs]. However they have not actually achieved very a lot but. I believe it might be attention-grabbing to see the place they go together with it, or whether or not they go together with it.
SB: Yeah, I believe it is likely to be attention-grabbing, as a result of I talked to so many firms within the meantime, additionally as a result of my MGA community place. And it is all the time as much as individuals. So it is a individuals’s enterprise. You’d assume that this expertise and digitization facet and so forth, it is simply an automation query. No, it isn’t, it is a individuals’s query. And what we skilled additionally inside the community, you all the time want some individuals actually motivated to combine that expertise within the firm. And generally once they change the corporate, once they soar into one other job, then you definitely all the time have the hazard that the corporate they labored for beforehand, may fall again right into a sleep regarding additive manufacturing. So what I need to say is, you all the time want lots of people who’re actually enthusiastic concerning the expertise, after which it is an ongoing venture. So additionally, inside my company, we all the time say if now we have one or two guys, within the upkeep facet, they hold the enterprise operating. However you all the time want these individuals and it’s essential to discover them and this isn’t a matter of hierarchy. It is not a matter of hierarchy. And that is actually attention-grabbing, as a result of that brings in such a democratic facet of the entire expertise, regardless of the stage of hierarchy, however you want individuals who actually know what they do and to like the expertise.
Additive manufacturing in a company will not be a expertise venture, it is a change administration venture. It’s important to persuade your colleagues it is a expertise you may depend on.
PD: Yeah, I believe the most effective individuals are those who have gotten a fairly broad expertise in design and manufacturing. And, and might perceive actually the place to make use of it and the place it is sensible to make use of when it comes to pace or value. And I believe one of many issues I’ve seen, and perhaps I am accountable for a few of this, is a number of latest graduates have been uncovered to additive manufacturing they usually appear to assume it is a answer to every thing, as a result of they do not have the broad information of different manufacturing processes. And I’ve seen this when, as a result of I have been in various universities labored in various universities, and so in the event that they’re doing, say a last 12 months venture, they usually need to make one thing, usually it is simpler for them to make it by an additive manufacturing course of than it’s by say, happening onto a milling machine and making it, as a result of they do not want the milling machine talent, they’ll simply put the CAD mannequin in and make it…
SB: [Laughs] however isn’t that nice?
PD: It’s, however generally they find yourself making issues, which economically, you’ll by no means do in an organization, as a result of it is simply so easy. You make one thing that appears fairly much like an oblong block with a gap in it. And so, I believe, what we actually want is a lot of individuals with a few years of expertise in design and manufacturing, who then get actually infused on this in its place course of. After which they’ll then see the place it matches.
SB: And also you want cheaper machines. As quickly as everybody in any manufacturing facet would assume just like the individuals you simply described, then the value of these machines would come down drastically. After which it might be price doing it. So, I all the time have the discussions with my engineers, they usually all the time inform me additive manufacturing is one thing for the area of interest. And I’d oppose, I’d say by now it is extra a distinct segment factor, however in future, simply assume 20 years forward, I’d say it will likely be a mass manufacturing expertise. And when you’ve got extra individuals, and for them, clearly it is simpler to design this CAD file, go to the printer and print it out. And so, what you can even see over the past years is these machines are getting much less complicated, they’re getting inexpensive. After all, this growth has to hold on. However 20 years forward, I’d say perhaps that is the subsequent manufacturing expertise ever. And what actually struck me was a few years in the past, a examine was printed by the Dutch ING Financial institution, they usually mentioned that by the 12 months 2040, 50% of all issues worldwide will probably be printable. After all, we are able to talk about whether or not it will likely be 2040 or 2050, however the story behind is so attention-grabbing. And for those who see simply concerning the latest developments within the final 5 years, now you may print concrete, you may print ceramics, metals, polymers, elastomers, even meals, bioprinting, and so forth, and so forth. So, that is consistently rising.
I’d actually love to do that discuss once more, perhaps in 15 years and look what it seems wish to be. However that is one thing daily, which actually motivates me so much, so that you all the time discover new applied sciences. And within the additive manufacturing scene, everybody is admittedly ready for Large Bang, like an explosion. There is no huge bang, it is like daily is slightly bing, bing, bing, bing, however the summing up [of these] ‘bings’ would be the huge bang. However yeah, now we have to satisfy once more [laughs].
PD: I believe what I’ve come to understand is that it takes so much longer for issues to occur than you anticipate. And so, I believe I did my first presentation on utilizing what was then speedy prototyping to make actual elements in 1996 in Darmstadt, the European Stereolithography Consumer Group. And in the following couple of years, we made some predictions about how issues had been going to alter and the way additive manufacturing was going to take over and the price of machines would come down and so forth. And it is taken an extended, very long time for motion to go in that course, a lot, for much longer than I anticipated. I assumed we’d be a lot additional on than we’re by now. So, it is actually attention-grabbing. Perhaps I used to be simply too optimistic [laughs].
SB: Yeah, however I believe it is nice to be optimistic as a result of for those who all the time have these individuals who keep on with the most recent tendencies, and simply what is feasible now, you’ll not have the creativity to assume past. And for this reason we’d like many, many extra people who find themselves actually optimistic and perhaps a bit loopy and perhaps a bit too optimistic, however that can push the entire business.
PD: The instance I take advantage of is definitely evaluating how lengthy it took for CNC machining to grow to be a extremely good course of. As a result of I believe it was invented in Dayton, in round about 1951. And it wasn’t actually till the mid 90s that it grew to become a extremely good course of, CNC machining with significantly better programming, greater spindle speeds, and so forth. And so over 40 years for it to grow to be a extremely good course of. And we’re now at about the identical stage with additive manufacturing, whenever you consider it being invented largely within the mid 80s. And we’re now about 40 years once more. So, I believe it in all probability goes to occur very quickly now but it surely nonetheless wants a lot of good individuals working right here. And that is been one of many issues I’ve observed in additive manufacturing, the variety of nice individuals and lovers who’ve actually pushed it’s wonderful.
SB: And what would you say ought to we do to assist the entire additive manufacturing business to develop precisely and to observe the trail of the opposite applied sciences? So, what do you assume could be useful?
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PD: I believe there’s nonetheless an enormous instructional job that is required. I believe within the universities and the universities, we’re doing okay. Most universities and faculties are working with additive manufacturing in a roundabout way. What I’ve seen right here, definitely within the UK, is you’ve got obtained tons and plenty of individuals already in work that do not replace their information and due to this fact they do not have the expertise of additive manufacturing. And so, it is a large effort that is wanted to exit into firms to teach individuals and produce them updated. And I believe, if there’s one factor we may do, that will be the primary factor. All the pieces else would observe from that.
SB: Yeah, it is actually an attention-grabbing facet. So, I’d recommend, as I’ve already talked about, that I studied economics fairly some time in the past. I believe the large benefit of additive manufacturing is to additionally catch individuals from totally different disciplines. So, would somebody who research economics be eager about milling or machining? No, it is nothing, which is admittedly horny and attention-grabbing, is additive manufacturing, in a position to catch individuals and their creativity. Undoubtedly, sure. Irrespective of the place they arrive from. I do know so many individuals coming from very, very totally different disciplines who’re actually devoted to additive manufacturing. And perhaps we must always assume extra about how can we use that? How can we get extra individuals into the expertise, they do not need to grow to be designers, however to push the boundaries of the expertise, perhaps it might even be very useful.
And as a European, I come from Berlin, I all the time discover it very attention-grabbing to check out different markets, different nations, different continents. And plenty of, many applied sciences had been invented in Europe, of the additive manufacturing, so many machines are designed and invented right here. Who’s significantly better to advertise that and to do advertising and marketing? These are the Individuals. Who’re the people who find themselves actually, actually quick and pondering ahead and what we are able to use it for? These are the Chinese language. Perhaps we additionally need to look throughout borders, additionally in nation clever, to study a bit extra, how can we discover extra use instances. And being a German, I could say that Germans do not like dangers in any respect, so till they purchase a machine, it can take months, perhaps additionally years. So, the Individuals are a lot sooner in these choices, and to usher in the nice of various cultures, that will even be fairly useful. And that is additionally one thing I believe there is a huge benefit within the upcoming years as a result of individuals do not stick a lot to their nations anymore, in order that they journey round, they work in different nations, they usually take the most effective of any tradition. I assume that may also be useful.
PD: Yeah, I believe the conferences and exhibitions do a terrific job and have a serious function on this, like Formnext, or AMUG or SME, or RAPID+TCT. In order that they’re doing an excellent job in bringing individuals collectively from totally different cultures and totally different backgrounds. However I believe we pushed for a giant effort within the UK, when it comes to information switch however sadly the federal government did not choose it up at the moment, they had been preoccupied by different issues like Brexit. So yeah, I believe the one factor I’d go for is extra information switch. And that might be, as you say, to all kinds of individuals as a result of there’s a lot of economics, in additive manufacturing. There’s a lot of medical makes use of, dentistry, all kinds of areas, artwork and so forth. So, it, it may be utilized by a lot of totally different individuals.
SB: Oh positively. And naturally, it will likely be very useful if we get some public funding to discover use instances, develop supplies and machines. However we will not wait. We will not await anybody. So, now we have to push this ourselves. And the good factor is that you’ve so many good individuals working in and with the expertise, they usually can actually accomplish that many issues.
That is what we expertise in our working group. So, Mobility Goes Additive, the community will not be solely consultant of the mobility sector anymore, so we additionally do aerospace and aviation and automotive. But in addition, MGA stands for Medical Goes Additive. And Phill I completely agree there are such a lot of methods to discover and to assume right into a affected person, particular person designed logic, this will probably be so useful for the entire medical sector. For the time being, we’re a bit busy to know what the brand new medical machine regulation will imply to additive manufacturing however as quickly as we have achieved that, and that is one thing we assist firms with within the community, then we are able to discover many extra methods within the printing of implants, orthoses, prosthesis, but in addition within the bioprinting sector. So, the primary coronary heart was already printed, pores and skin is printed, organs are printed proper now. Can they be transplanted? No, not in the intervening time. In future? Undoubtedly, sure. And so, after all, it will take perhaps a bit longer than we each hope it can take, however it will likely be sooner or later. And that is one thing which is so encouraging. And might you consider every other expertise which actually drives developments as a lot as additive manufacturing? I can not.
PD: No, no. To be sincere, I believe the medical space will probably be, by far, the largest software space for additive manufacturing sooner or later. A lot greater than all the commercial areas. I see the potential is simply phenomenal. A number of the work totally different individuals are doing is wonderful.
SB: And I want to add one thing. I do not assume that we simply have to stay to medical functions, take into consideration the development sector, take into consideration the constructing of homes. So, you may, sooner or later, do that in a really low cost approach, with completely totally different designs, and in a really sustainable approach, since you want much less materials. So, that is simply on the very starting. I all the time say that printing of concrete is so far as spare elements printing 5 years in the past, so, however I’d say they’ve an excellent future, they’ll do light-weight designs. And for those who analyse the development sector, they’ve an enormous drawback with getting sufficient workforce. And so additive manufacturing also can assist in fixing these challenges too. And as quickly as you have got a brand new sector, which is discovering additive manufacturing, yeah, there’s all the time a vibrant future. And particularly within the building sector, I’d say that is positively additionally, the longer term is AM.
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