Protolabs Insights: Teiledesign für CNC - Optimierung bei der CNC-Bearbeitung

In diesem Video zeigen wir Ihnen Möglichkeiten, wie Sie Ihr Teiledesign in der CNC-Bearbeitung optimieren können. Die CNC-Bearbeitung eignet sich, um schnell und kostengünstig Prototypen und Produktionsteile zu erhalten. Sie hat jedoch wie alles andere Verfahren, ihre Stärken und Schwächen.

00:02[Music]

00:08hello and welcome to this masterclass

00:10today we're going to be running through

00:12a few ways to optimize your part design

00:15for CNC machining now as you know CNC

00:19machining is a great way to get your

00:22prototypes and production parts made up

00:25quickly and cost efficiently

00:27however like anything else out there it

00:30has its strengths and weaknesses and to

00:33really take advantage of it you need to

00:35build it into your design with machining

00:38in mind for example from the moment you

00:41start sketching up your ideas you need

00:43to be thinking in depth about the

00:45diameter of any holes you'll be thinking

00:48about putting into it the reason for

00:50this is that many suppliers put in holes

00:52with an end mill rather than a regular

00:55drill bit they do this because it

00:57provides great flexibility in terms of

01:00hole sizes available with any given tool

01:03and offers better surface finish that is

01:06possible than with a drill it also

01:08allows them to use the same tool for

01:11machining slots and pockets reducing the

01:14cycle time and in turn the overall cost

01:17to you the only downside of this all is

01:19that the holes more than six diameters

01:21deep become a real challenge an end mill

01:24only has a limited length so putting

01:27anything in beyond that may require

01:29machining from both sides of the part

01:31that takes time and money and another

01:35bit of machining that usually involves

01:37drills is thread making now many shops

01:39use taps to cut internal threads but we

01:42like to take a more approach a more

01:45modern approach we've tall called the

01:47thread mill this creates an accurate

01:49thread and a single milling tool can be

01:52used to cut any thread size that shares

01:54that pitch which saves on both

01:56production and set-up time what this

01:59means to you is that you can use UNF and

02:02unc threads at number two and half an

02:05inch and metric threads from m 2 and m

02:0712 and everything is going to work out

02:10just great now let's talk about letter

02:13logos and numbers sometimes the piece

02:16that you're manufacturing needs to have

02:18a part number description or logo milled

02:22into it if this is the case for your

02:24part you need to make sure the design is

02:26going to work smoothly with milling on a

02:29practical level that means the spacing

02:31between individual characters and the

02:34stroke used to write them needs to

02:36measure at least half a millimeter and

02:38that the text should be recessed rather

02:41than raised marking it onto the part is

02:45a lot easier than removing it on top of

02:48that ideally we're taking a look at the

02:51text between 20 points or larger with a

02:53simple sans-serif font like Arial the

02:57next thing to bear in mind when drawing

02:58up those plans is the height of your

03:01walls and the size of your features even

03:04the strongest tools bend a little has to

03:06do the materials being machined and

03:08because of this the wall Heights and the

03:10feature sizes that you can get away with

03:13are very dependent on the individual

03:16part geometry the minimum feature

03:18thickness we work with here at proto

03:20labs is half a mil with the maximum

03:23feature depth coming in at 51 mil

03:26however even with that in mind it

03:29doesn't mean that you can build a ribbed

03:31heatsink using those dimensions that is

03:34just not going to work right that is

03:37pretty much everything about what you

03:38can't do or at least what you shouldn't

03:41do or you should try avoiding so let's

03:43talk about some interesting things that

03:45you can do with modern CNC machining for

03:49example you can take advantage of light

03:52or CNC turning the tool sets used on

03:55these machines allowed for off-center

03:57holes

03:58slots flats and other features that can

04:00be machined

04:01parallel or perpendicular to the long

04:03axis of the turned workpiece the

04:06difference here is in the shape of the

04:08raw material (Hersteller) rather than the tool set

04:11itself turn parts such as shafts and

04:13Pistons start out with round stock while

04:16milled parts like manifolds instrument

04:18cases and valve covers for example

04:21typically don't they use square or

04:23rectangular blocks instead on top

04:26with that we're now able to offer 5-axis

04:29index milling which can allow for some

04:31pretty wild designs you see with

04:34conventional three axis milling the

04:36workpiece is gripped from the bottom of

04:38the raw material blank while all of the

04:41part features are cut from the top each

04:44side of the workpiece thus requires a

04:46separate setup and only the top and

04:49bottom can be machined with five axis

04:52index milling the part can be rotated

04:55about on both the x and y axis being

04:58indexed to 90 degrees in any given angle

05:01and multiple or compound angles this

05:04allows for some truly complex

05:06positioning the mass and geometry

05:09involved in planning out the milling of

05:11these parts is seriously impressive

05:14thank you for watching and we look

05:16forward to seeing you again next Friday

05:20[Music]

05:25you