Convert your sketches or 3D solid models to clear mechanical CAD drawings


Objective:

Joly Concept can put your mechanical design ideas to CAD engineering and manufacturing drawing documents. Clearly communicate your design intent to your manufacturing suppliers or professionals and the shop floor.

Description:

Mechanical drawings are graphical representation or views that describe the position, size and shapes of the features of a part or assembly. Mechanical Engineering drawing documents follow the practices that are based on the ASME Y14.0+ standard. This defines a common way of representing objects in a consistent fashion that will reduce the chance of misinterpretation between the designers and manufacturers of the parts or assemblies.

Representations of views

To describe a 3D object on a 2D medium consists of showing multiple point of views of the object. These views can be as seen from the top, bottom, front, back, right, left sides or any other point of view that will describe details of the object as well as isometric 3D representations. A view can be a cut-out or slice to show internal features or a portion of the object that is zoomed in to describe smaller details, patterns of common features and so on...

Example of dimensions on drawing

Dimensioning an object to be manufactured on a mechanical drawing consists of defining the size and positioning of the features relative to each other or a common reference feature. This reference feature can be, for example; a corner, center of a hole, center axis of a shaft, just to name a few.

Example of tolerances on drawing

Tolerances are used to define an acceptable allowable range for size, position or geometric shape of a particular feature. This usually consist of specifying a basic size with an upper and lower limit to the size or position. Geometrical tolerances consists of defining allowable limits of the shape relative to a particular feature such as perpendicularity, concentricity and flatness for example.

Example of a hand drawn sketch

A drawing doesn't have to be a perfect representation of the object or assembly. The important aspect is that the features and details of the object are defined correctly. The goal is to communicate clearly the shape, size, positions and deviation allowances of features of the part to be created.

As you can notice from the technical drawings above. A properly laid out and annotated drawing greatly improves the intent of the mechanical component. A clear drawing greatly reduces any misinterpretation from the machinist or supplier and reduces requests for more information to your mechanical engineer or designer further reducing possible delays and non-compliant parts.

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