Marking Out

Marking out is the process of transferring a design or pattern to a workpiece, as the first step in the manufacturing process. It is performed in many industries or hobbies although in the repetition industries the machine's initial setup is designed to remove the need to mark out every individual piece.

The actual method is unique for each field of expertise, some common areas and their needs are listed below as examples of the variation in an otherwise simple process.

Engineering

In the metal trades area, marking out consists of transferring the engineers Technical drawing to the workpiece in preparation for the next step, machining or manufacture.

Tools that are peculiar to the engineering area are typically

  • surface plate or marking out table — provides a True#Other uses of true surface from which to work
  • angle plates — assist in holding the workpiece perpendicular to the table
  • scriber — is the equivalent of a pen or pencil. It literally scratches the metal surface leaving behind a fine, bright line.
  • height gauge or scribing block — allows lines to be scribed at a preset distance, from the tables surface.
  • marking blue — to provide a usable writing surface by covering any existing scratches and providing a contrasting background.
  • protractor — to assist in the transfer of angle
  • Combination square — an alternative tool for transferring angular measurements
  • machinist square — to transfer Angle#Types_of_angles to the workpiece
  • punch (engineering) — either punch (engineering) or punch (engineering) punch to create permanent marks or dimples for drill bits to start in.
  • Ball-peen hammer — used in conjunction with the punches to provide the striking blow needed.

Welding

As welding does not always require the use of fine tolerances, marking out is usually performed by using punch (engineering), hammers, tape measures and chalk.

The chalk is usually found in the form of small, pre cut blocks of talc. These talc blocks can be sharpened to a stronger point than the softer blackboard chalk, chalk also provides a contrasting color to the Hot rolling steel that is generally used.

Sheetmetal

A sharp scriber along with try squares, rulers, trammel (engineers)s and tape measures are generally sufficient for this field

Woodworking



category:Tools