Autodesk Inventor is a mechanical 3D CAD application for Windows. It creates individual parts and complete assemblies, turns those models into manufacturing drawings, and evaluates structural loading and mechanism motion. Dimensions, relationships and design rules govern how a model changes as its design develops.
Part modeling in Autodesk Inventor
A part can begin with a sketch whose dimensions and constraints define its shape. Parameter formulas link values together, so related dimensions can follow a design change. The resulting features remain part of the model definition and can be edited later.
Extrude gives a profile depth, with controls for direction, taper and where the extrusion ends. It can add material, cut an existing body, intersect it or create another solid body. Revolve instead turns a profile around an axis to form shapes such as hubs or containers.
Sweep carries a profile or solid along a path. A guide rail or surface controls how the profile scales or twists along that path. Loft joins several sections into a changing shape, with rails and point mapping to control the transitions.
Direct edits and freeform shapes
Inventor also provides direct controls for moving, rotating, resizing and scaling imported geometry. Freeform modeling changes a shape by moving its points, edges and faces. These methods give the designer ways to adjust geometry alongside sketch-driven features.
Assembly relationships and standard components
Assemblies combine parts and subassemblies into a mechanical unit. Components can be inserted from existing files or created in place, using the surrounding assembly as their context. An individual component can then be edited without leaving the assembly.
Assembly relationships control component positions and their degrees of freedom: the movements still available to them. Grounding a component removes those movements. Interference checks identify overlapping components while the designer works on their fit.
Assembly features can represent machining across several components, such as a cut made after parts have been brought together. These features belong to the assembly, rather than becoming edits stored separately in every component file.
Content Center
Content Center supplies standard and customizable component libraries. These include structural members, bolted connections, gears, cams, belts and springs. Library components can be used within the assembly instead of building each standard item from its initial sketch.
Manufacturing documentation and fabrication models
Drawings and model-based definition
Autodesk Inventor creates drawing sheets from part and assembly models. A template provides the border, title block and sheet format; the designer selects a base view and adds annotations. Assembly view representations control which components appear in a drawing.
Dimensions from the model can be reused in the drawing. Drawing-only dimensions provide annotations without altering the model geometry. Selected model properties can also be copied into drawing properties and updated from the source model.
The drawing environment supports printing IDW, DWG and 2D DWF files. Model-based definition places dimensions, annotations and dimensional tolerances directly on the 3D model, carrying manufacturing information with the geometry for downstream applications.
Sheet metal and flat patterns
Sheet metal models use rules for material, thickness, bend allowances, unfolding and gaps. A rule change can affect more than the material label: different material choices may require different bend and corner definitions.
Inventor maintains folded models and flat patterns for fabrication detailing. Features can be unfolded for work on the flattened form and then refolded. A regular or imported part can be converted to sheet metal when its thickness is consistent.
Frame construction
Frame Generator places structural members along a skeleton made from lines, edges or points. The designer selects a library family, section size and material, then applies miters, notches or other end treatments. Member lengths account for those cuts.
The frame can produce a cut list containing member dimensions and end treatments. Its insertion and change tools require the relevant Content Center libraries. Reusing an identical member is available for straight members, while curved members use their own definitions.
Tube and pipe runs
The Tube & Pipe assembly environment adds runs and routes to mechanical designs. Styles and initial fittings define the routing arrangement, including branches, before selected routes are populated. The completed assembly can be represented in drawings and presentations.
Stress analysis and mechanism simulation
Structural loading and natural frequencies
Built-in Stress Analysis takes part or assembly geometry together with material, loads, constraints and contact conditions. Mesh preferences control how the geometry is divided into smaller elements. The solver combines their behavior to calculate results for the defined study.
Static analysis evaluates structural loading; modal analysis evaluates natural frequency modes. Parameter combinations let the designer compare different cases, with results displayed graphically. The environment supports assemblies and weldments and is designed for isotropic materials, such as metals, plastics and glass.
Motion, forces and joints
Dynamic simulation uses the assembly’s mechanism components and joints. The designer can define external forces, torques and a gravity vector, and control which components are grounded or free to move. Suppressing a load removes it from subsequent calculations without deleting its definition.
The simulation evaluates motion over time, including speed, acceleration and joint reactions. This examines the movement of a mechanism, while structural analysis examines its response to loading. Advanced Inventor Nastran analysis is included with the Product Design & Manufacturing Collection subscription.
Design configuration with iLogic
iLogic stores design behavior in rules that control parameters, features and components. These small VB.NET programs can be embedded in part, assembly and drawing documents. A rule reads the current parameter values and writes changes back into the model.
Rules can respond to parameter changes or run through events. For example, a rule can set one dimension from another or control a component according to a design choice. This keeps the configuration logic with the design rather than requiring each change to be entered separately.
Custom forms
Custom forms connect interface controls to model parameters, properties and rules. Their interface can be arranged by dragging controls into place, and forms can exist without rules. Forms may be saved with a document or stored for use across documents.
External rules
External rules are stored in text or VB files and can be run manually or from other rules. They do not automatically respond to parameter changes in the same way as internal rules using parameter variables. Their behavior therefore depends on how they are invoked.
CAD exchange and browser review
Referenced and converted models
Autodesk Inventor imports geometry from other CAD systems, with the available options determined by the file format. AnyCAD Reference keeps an association with the source design; Convert Model creates separate Inventor files. The distinction controls whether later source changes reach the imported model.
| Import mode | Source changes | Working with the imported geometry |
|---|---|---|
| Reference Model | A retained link allows the source model and downstream references to be updated. | Part imports support added features and direct edits. In an assembly, referenced geometry can be positioned and used for relationships, but cannot be directly modified or restructured there. |
| Convert Model | The new Inventor files have no continuing association with the original. | Imported geometry becomes base features. Inventor features can be added, but the original CAD feature definitions are not recovered. |
Reference formats include SolidWorks, CATIA, NX, Solid Edge, Creo and STEP. Conversion also supports formats such as IGES, Parasolid, SAT and Rhino. Export targets include STEP, IGES, Parasolid, JT, STL and GLTF/GLB, with different options for each format.
STEP reference updates involve a fresh translation and can leave unresolved geometry. Associative DWG underlays retain their link to the AutoCAD drawing, allowing geometry or position changes to reach the Inventor model.
Shared Views
Shared Views uploads a visual representation of a design for browser review and comments. Collaborators can open its link without installing an Autodesk product. The owner can manage comments and extend or remove the shared view.
Uploading a Shared View requires a subscription, and it includes the active model state of the top document. Work geometry and view sectioning are excluded. The shared representation serves review rather than transferring an editable native model.
Subscription and collection access
Inventor is offered as a paid subscription with a time-limited free trial. It is also part of the Product Design & Manufacturing Collection, alongside separate applications including AutoCAD and Fusion. Companion applications and collection tools retain their own functions and access arrangements.
