Pivot Clamp Assembly



NXDATUM VALIDATION TOOL

NX Model Validation

NXDATUM CAD Education Portal

⏱️ Time: 00:00:00
Attempts: 0/5 | Best: --:--:--
CAD Modelling Challenge — Engineering Drawing Breakdown NX Modelling Challenge #19 | NXDATUM 04DTM23 This week's challenge is a complex clevis-style mounting bracket — a multi-view, multi-feature part that includes a section view, a cylindrical bore, undercut slots, and compound fillets. If the previous challenges felt manageable, this one is a significant step up. Every view on this drawing carries critical information that cannot be ignored. Reading the Drawing — All Four Views Matter This drawing presents a front view, right-side view, bottom view, and a Section A-A. Beginners tend to model from the front view alone and guess the rest — that approach will fail here. Front View: Gives you the overall width of 80mm, the yoke arms with 2× R10 fillets, the central Ø25 bore, R15 and R16 blends, and the stepped base profile. Right-Side View: Reveals a 40mm depth with an R10 top edge and a Ø17/Ø30 counterbore configuration. Bottom View: Often ignored, but it shows the full 200mm base length, a 50mm slot gap, and two downward-facing T-slot or rail features spaced 30–60–30mm with a 37.5mm drop depth. Section A-A — The Most Important View on This Sheet The Section A-A cut reveals the internal geometry of the cylindrical boss: a Ø25 through-bore at 114° angular orientation with a 38mm outer boss diameter. This angled bore is what separates this challenge from a standard bracket. It cannot be created with a simple perpendicular hole operation. In Siemens NX, you must define a datum axis or angled datum plane at 114° and place your hole feature on that reference. Getting this wrong means your Section A-A will not match — and your mass calculation will be off. Modelling Strategy in Siemens NX Start with the base plate extrusion — 200mm × 50mm overall profile from the bottom view. Build the vertical bracket wall next using the front view profile as your sketch reference. Model the yoke arms as separate extrusions on the top face, then add the Ø25 central bore. Apply the R15, R16, R10, R9, and R5 fillets in a single fillet operation where possible — do not apply them one by one. The T-slot features at the bottom require a separate cut extrusion using a channel profile. Finally, create an angled datum plane for the 114° bore and place the Ø25 hole operation on it. Verify against Section A-A before finalising. What This Challenge Tests This task tests multi-view drawing interpretation, angled datum plane creation, counterbore and through-hole sequencing, fillet strategy on compound geometry, and the discipline to use the bottom view and section view instead of guessing. This is intermediate-to-advanced territory in Siemens NX. If your feature tree is clean and your mass properties match, you have genuinely levelled up. Complete the model in Siemens NX, run mass properties, and submit your answer on the NXDATUM validation tool. Created by NXDATUM | Siemens NX CAD Modelling Series | All dimensions in mm | Scale 1:1 | Sheet A3
This platform is curated by 04 DTM 23, a mechanical engineering professional with a background in Tool and Die Making from the Indo-German Tool Room. Driven by a strong passion for advanced 3D modeling, precision engineering, and computer-aided design—specifically utilizing Siemens NX—this blog serves as a dedicated repository for CAD drawings and design practice. The core objective of NXDATUM is to share high-quality, practical design exercises, document technical progression, and build a valuable resource for fellow designers and engineering enthusiasts aiming to refine their CAD proficiency and mechanical design skills.

Comments

Post a Comment

Popular Posts