πŸ€‘ GD&T in precision engineering: using slots in precision location

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the ends of the box could be difficult to align correctly with an open design. of a plastic assembly, having pins and corresponding holes be the first points of In situations where tabs are mating with a slot for weld fixturing, give yourself as.


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SolidWorks Hole Alignment

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But we have always done it that way!! I need to align two flat surfaced components, say pcb to chassis, and want to control the alignment of said.


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PolyWorks : Measurement : How To Slot Measurement

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The customer requires that the "lid" align in all axis very closely. Usually one hole is B and the slot is C but they got crazy on you for this one.


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SOLIDWORKS – Hole Alignment

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the ends of the box could be difficult to align correctly with an open design. of a plastic assembly, having pins and corresponding holes be the first points of In situations where tabs are mating with a slot for weld fixturing, give yourself as.


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Hole and Slot as Datum Features -- Part II

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Instead of two holes, we will put a single hole, and a slot in the second part. The axis of the slot will be along the line between the two hole.


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ARCOCAD CMM ALIGNMENT PLANE 2 HOLES

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Instead of two holes, we will put a single hole, and a slot in the second part. The axis of the slot will be along the line between the two hole.


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SolidWorks Hole Alignment

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But we have always done it that way!! I need to align two flat surfaced components, say pcb to chassis, and want to control the alignment of said.


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Hole and Slot as Datum Features -- Part I

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the ends of the box could be difficult to align correctly with an open design. of a plastic assembly, having pins and corresponding holes be the first points of In situations where tabs are mating with a slot for weld fixturing, give yourself as.


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Hi all, I need to tightly hold the alignment between a hole and a slot. The hole has a unilateral postiional tolerance from the tertiary datum and I.


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the ends of the box could be difficult to align correctly with an open design. of a plastic assembly, having pins and corresponding holes be the first points of In situations where tabs are mating with a slot for weld fixturing, give yourself as.


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Solid Edge: How to align a Slot with two holes.

One of the easiest places to see this is in the design of the basic sheet metal box. A simple way to do this is to have a back-side bore that allows the screw boss to act as a locating pin, so that all the assembler needs to do is set the piece onto the base, move it around till the bore and bosses fall into place, and then apply the screws. Last page. Between two parts of a plastic assembly, having pins and corresponding holes be the first points of contact allows for the other features to mate smoothly, creating smoother snap-fit assembly or self-location while the parts are screwed together. Is there an easier way? Of course, in real-life product assembly, designs must be more complex. Up Next. For instance, in the example above of using backside bores in electronics housings to mate with screw bosses, make sure that the design allows enough play that the bore will always fit the boss with normal manufacturing variation. Though one direction either x or y is automatically located because of the edge, you can further reduce the remaining fixturing by again having a tab along the edge with a corresponding cut out on the other piece, so that both x and y are located, again requiring only that the angle be fixtured during the weld. For example, imagine the fairly common situation in which two pieces of steel plate are welded together into a bracket, with one piece of steel plate mounting at a right angle to the other in the center of the plateβ€”a fairly common scenario for all types of industrial design, such as i-beam connections and cable mounts in cranes. Of course! Similarly, with other types of welding, creating self-fixturing parts can lead to significant cost savings. Of course, like any concept, self-locating and self-fixturing assembly ideas can be taken too far. You are now subscribed to our blog!{/INSERTKEYS}{/PARAGRAPH} Sheet metal has a tradition of creating self-locating assemblies β€” a great example to follow. Hardware Guide Subscribe Get Quote. Even when my parents encouraged my interest in engineering with more complex Fischer Technics, nothing replaced the joy of quickly snapping pieces together in increasingly complex shapes. {PARAGRAPH}{INSERTKEYS}When I was a kid, nothing was more valuable to me than my big blue bucket of the multi-colored bricks. By signing up, you agree to our Terms of Use and Privacy Policy. Chamfers on dowel pins ease assembly by self-locating the parts. A small tab reduces the tooling required to fixture two parts during welding. This will locate it in both x and y, and then a right-angle magnet can hold the third axis. Self-locating and self-fixturing should make assembly easier, not cause additional parts to be rejected due to too-tight tolerancing. The bore on the back of the cross bar in white allows the parts to self-fixture while the screws are applied. Main navigation What is Fictiv? Thank you! Help us by sharing. So, how can we create designs that can be assembled more intuitively? For welding tabs, by using different lengths of tabs for different parts, the assembler intuitively knows which goes where. A Warning: When Fixtures Go Awry Of course, like any concept, self-locating and self-fixturing assembly ideas can be taken too far. Breadcrumb HWG Assemble. And this same idea can hold true for even simpler assemblies, such as when two plates are welded together at a ninety along their edges. Two key principles in any design are that parts should be self-locating and self-fixturing. Likewise, because of our history in designing for machined parts , pins have made a beautiful cross-over to plastic injection molded components. Or, if you have a coworker who likes to design super-complex assemblies, send them a link to this article to help them simplify. In situations where tabs are mating with a slot for weld fixturing, give yourself as much width and length on the slot as possible. We may use the info you submit to contact you and use data from third parties to personalize your experience. When you create pins in the design, for instance, by using asymmetric pin patterns, you can ensure that the parts only physically allow assembly in the correct orientation. Was this article helpful? Because sheet metal products have a history of being designed by the guy who actually does the work on the floor, sheet metal products think HVAC ducting, as well as the lockers in your gym tend to be excellent examples of design for assembly , especially when looking at self-locating parts, which reduce assembly errors. With three sides typically formed from a single piece, the ends of the box could be difficult to align correctly with an open design. Previous page. The simplest solution here is to create a small tab on the second piece that fits into a slot on the primary piece. Sign up below! Whether the resulting assembly is spot-welded, riveted or screwed together, these tabs accurately locate the pieces during the operation, removing the necessity of additional fixtures or measurement during assembly. Written by Christian Brown. Along with time savings and tooling cost savings, one of the great benefits of creating self-fixturing designs is the ability to build in warnings and gages for the assembly workers. Want more tips like these sent to your inbox? A common method of self-locating parts in machine assemblies is to use dowel pins, which can then either be used strictly as a locating feature to hold parts in the correct place during assembly with screws or can be used on their own for press-fit assembly. Tabs can also be used to locate parts along an edge to reduce measurements during assembly. Simple, clean, and guaranteed to make you a hero on the manufacturing floorβ€”and the cost savings will make you a hero with the bean counters upstairs. With just these two pieces, the first plate can sit flat, but the second plate needs to be fixtured to the right location in x and y, as well as the correct angle. Self-Fixturing for Welding Similarly, with other types of welding, creating self-fixturing parts can lead to significant cost savings.