| 摘要 |
<p>Pre-cutting device for a sawing apparatus with a saw blade, comprising a base part (1) which is to be fixed to the sawing apparatus and which has a channel running above a saw cut to be made by the saw blade in a workpiece and running essentially perpendicular to the saw cut, a bar (11) which can be slid axially against spring (18) pressure in the channel, and two cutting elements which are fitted to the bar in a head of the bar outside the channel, and which are suitable for cutting into the workpiece two parallel grooves which correspond to the boundary lines of the saw cut subsequently to be made between the grooves, in which the head of the bar has two bores running parallel to the sliding direction of the bar, and each cutting element is a pin (20) which is fitted in a respective bore, and of which a free end projecting beyond the bore has a sharp point. <IMAGE></p> |
