|Filing - Course: Technique for manual working of materials. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 21 p.)|
Auxiliary means for filing are clamping devices which are to be selected according to the purpose of clamping the relevant cross section of the workpiece.
The workpiece is to be clamped so that the file stroke is always horizontal.
The workpiece is to be clamped as firmly and securely as to eliminate any springiness and displacement of the workpiece during filing!
In addition to the clamping devices also used for the working technique manual sawing, such as:
- vee clamps
- angle clamps
- protective jaws,
Figure 16 Vice
the following auxiliary means are in use:
Clamping jaws for round stock:
Specially formed vice attachments with halved holes permitting vertical clamping without squeezing of thin round stock.
Figure 17 Clamping jaws for round stock
Clamping jaws for threaded bolts and thread clamps:
Specially formed vice attachments with halved holes permitting vertical clamping of threaded bolts. For small screws a thread clamp is used.
Figure 18 Clamping jaws for threaded bolts and thread clamps
Clamping device for clamping of small, flat parts in a vice at an angle of 45 degrees. It is used for filing of bevels only.
Figure 19 Angle vice
Hand vice and pin vice:
Clamping device for clamping of small parts, mostly sheets, to be filed on any support.
Pin vices are also often used as universal clamping devices for other working techniques (drilling, counterboring, riveting).
Figure 20 Hand vice and pin cice
Sheet metal clamp:
Angle attachment to extend the vice jaws serving for horizontal clamping of longer sheets.
At the protruding end it is mounted with a small clamp or hand vice.
Figure 21 Sheet metal clamp
Profiles are to be clamped with suitable attachments which can be made from wood so as to suit the relevant form.
Figure 22 Wooden attachment for clamping of profiles
Which requirements must be met when
Which auxiliary means are suitable for clamping of