Marking Out Sheet Metal

Measuring marking cutting out revision 2 0 august 2014 1 0 hand tools sheet metal hand tools are used to scribe or measure lines perform layout operations and shape or cut metals.

Marking out sheet metal.

Brannock high school technology department. Ruler for marking out you will need a steel ruler as described in part 1. The true surface is formed by a marking off table which becomes an integral part of the whole system and is used in conjunction with a scribing block. It s a precision instrument used for accurately marking out lines over metals with respect to a standard parallel true surface.

A firm surface not. Dividers are used to mark out shapes onto sheet metal. This is 0 4mm thick which brings the. Special sharp and hard tools are needed to mark out lines on metal.

They work best if a small indent is placed on the sheet metal using a centre punch for one of the legs to rest in. Many parts will be cut from pieces of ready cut strip or drawn wire but some things like mainframes. Some of the hand tools in the following notes actually perform these operations while others such as stakes and punches serve as aids in performing them. Part 2 marking out metal introduction.

The change in surface properties shows a contrast which is the visible mark. A pemanent marker pen can be used in place of the blue ink like liquid. Etching can be accomplished with a number of methods but each of them rely on disturbing the surface of the metal to a noticeable depth. To measure a point on a marked line use a v marking.

Mainly ball peen hammer cross peen hammers and mallet used in practice. Dot peen marking systems. The most common etching methods include. This is used for marking out work locating centres etc.

This could be the use of one straight edge of a sheet of metal as the datum for marking out a square or a specific corner of the material. They are used just like compasses to scrape circles and arcs onto the metal. A marking out operation will be more accurate if all measurements are from one datum point.