What is the alphabet of lines?

Technical Drawing and CAD » Alphabet of Lines. Alphabet of Lines. The Alphabet of Lines. Lines are the critical component of sketching. In an engineering drawing, either a sketch or a blueprint, the type of line, either its thickness or its shape (solid, broken, dashed, etc) or the end detail has its own meaning.

Hereof, what are break lines?

Breaklines are critical to creating an accurate surface model because it is the interpolation of the data, not only the data itself, that determines the shape of the model. Use breaklines to define features, such as retaining walls, curbs, tops of ridges, and streams.

What are the types of line?

There are four types of lines: horizontal line, vertical line, perpendicular, and parallel lines. They are defined based on their orientation, and the angles if any, formed between them.

What is a section line in engineering?

The diagonal lines on the section drawing are used to indicate the area that has been theoretically cut. These lines are called section lining or cross-hatching. The lines are thin and are usually drawn at a 45-degree angle to the major outline of the object.

What is a short break line?

The short break line is a thick, irregular line used to indicate a partial cut. This line is drawn freehand. THE SHORT BREAK LINE. The long break line is a fine line used to shorten the view of a long part that can not be shown full length.

What are the hidden lines?

Hidden Lines. Hidden lines are used to represent surfaces that are not directly visible in the orthographic view.

What are the different types of line?

There are 5 types of lines:

  • Horizontal line.
  • Vertical line.
  • Skew Lines.
  • Parallel Lines.
  • Perpendicular Lines.
  • What is a leader line for?

    A leader line is a line that establishes a connection between a graphical representation of an item and some text. A leader points to a bit of our drawing and says: ‘Oi – Look Here’ and ‘Read This!’. The leader line itself should be a continuous Thin line (see this post on Linetype Definitions).

    What is the definition of a long break line?

    Long break lines are used to reduce the length of the longer lines in the drawings. But the object should have consistent shape for using “long break lines”. You can draw jagged line to shorten long object in the drawing.

    What is the alphabet of line?

    The lines in the Alphabet of Lines are used to describe shape, size, hidden surfaces, interior detail, and alternate positions of parts. Each conveys a particular meaning on the drawing.

    What is the use of a phantom line?

    Phantom lines: Phantom lines are used to indicate imaginary features. For example, they are used to indicate the alternate positions of moving parts, and adjacent positions of related parts. The line type is long dash – short dash – short dash and the line weight is usually thin (0.3 mm).

    What is an alphabet of lines?

    Technical drawings provide clear and accurate information how an object is to be manufactured. Line symbols used in technical drawing are often referred to as ALPHABET OF LINES. The use of line symbols enables engineers/designers to express features of designed products clearly and accurately.

    What is an extension line?

    Extension lines indicate the points between which the dimension figures apply. They are drawn perpendicular to the dimension lines, start with a visible gap (~1/32″) between them and the object, and terminate 1/8″ (3.2 mm) beyond the last arrowhead.

    What is the definition of visible lines?

    Line Conventions, Continued Visible lines Any lines visible in a view that define edges or outlines of objects are drawn with lines referred to as visible lines. Visible lines are drawn as solid, thick lines.

    What is a line in drawing?

    Line art or line drawing is any image that consists of distinct straight or curved lines placed against a (usually plain) background, without gradations in shade (darkness) or hue (color) to represent two-dimensional or three-dimensional objects. One of the most fundamental elements of art is the line.

    What is the phantom line?

    Phantom lines (see Figure 1-6) are thin lines used to indicate alternate positions of the parts of an object, repeated detail or the locations of absent parts. They are made by alternating one long and two evenly- spaced, short dashes, with a long dash at each end.

    What is included in a title block?

    The drawing title and the drawing number are used for identification and filing purposes. Usually the number is unique to the drawing and is comprised of a code that contains information about the drawing such as the site, system, and type of drawing.

    What is the definition of visible line?

    Used to represent visible edges and outlines of the object being drawn. Definition. VISIBLE LINE. Term. Represents edges and oulines of an object that are not visible in a given view.

    What is the definition of a construction line?

    Construction lines (also known as xlines) are temporary linework entities that can be used as references when creating and positioning other objects or linework. Construction lines are either circles or straight lines that extend to infinity in both directions.

    What is the definition of cutting plane line?

    CUTTING PLANE LINES: Cutting plane lines indicate a plane or planes exposed by cutting and removing an imaginary section of the object. The exposed plane is called the sectional view and the line used to cut the object is referred to as the cutting plane line.

    What is dimensioning a drawing?

    A DIMENSION is a numerical value expressed in appropriate units of measurement and used to define the size, location, orientation, form or other geometric characteristics of a part. • A method of communication to machinists in the Production facility.

    What is the definition of a dimension line?

    The dimension line is a thin line, broken in the middle to allow the placement of the dimension value, with arrowheads at each end (see diagram below). An arrowhead is approximately 3 mm long and 1mm wide. That is, the length is roughly three times the width.

    What is a section line in engineering?

    The diagonal lines on the section drawing are used to indicate the area that has been theoretically cut. These lines are called section lining or cross-hatching. The lines are thin and are usually drawn at a 45-degree angle to the major outline of the object.