Jig (tool)

A device is a work means the mechanical engineering sense. They can be in universal and workpiece- dependent devices divide. A vise is a simple workpieces independent device for position determination.

Purpose

To manufacture devices worthwhile mostly for mass production or for small batches, but it can even be worthwhile for a single workpiece. A device can also be an indispensable tool to perform a work whose quality can not otherwise be guaranteed. Clamping devices for unambiguous orientation of a workpiece or more workpieces are often made ​​for this purpose only. If for example in the production of bicycles frame changes ( larger / smaller / different), then the device for the changed production is replaced or rebuilt.

Example

A simple example of a device, a drilling template, the rapid drilling of workpieces allowed with a base plate or tray and a top plate with predetermined bore sleeves, without separately the individual workpiece is always to have to first measure and mark: you put the work into the appropriate template and drilled from all predetermined drilling positions.

Functions

The following functions can be distinguished for the construction of a device:

• Position for position setting in a statically determined location ( degree of freedom equal to 0 )
• Determine for fixing the position with a light force
• Margins for fixing the position against the forces that occur in the production process
• Possibly Run: imposing a forced movement
• Possibly parts: assigning multiple layers of workpieces for machining

These functions are defined to be carried out reproducibly and with the necessary for the manufacturing accuracy.

Species

There are mechanical, magnetic, hydraulic or pneumatically operated devices. But there are also devices that can use several of these methods simultaneously, if necessary.

In addition to so-called standard jig and fixture, there are also Fixturing ( groove or hole systems ) with which variable jigs can be created. The workpieces are held, for example, with clamps ( clamps ).

A device is in the field of electrical engineering a tool in the form of a specific circuit arrangement of individual components or a device, such as a charger is used to charge a battery. A soldering bath for soldering of printed circuit boards is referred to as a soldering device.