SU459549A1 - Contour cutting knife for spiral chippers - Google Patents

Description

one

The invention relates to the woodworking industry.

Known cutting knife for spiral chippers, made in the form of a plate with a long cutting edge, a protrusion with a short cutting edge and a mounting groove.

However, such a knife is laborious to manufacture and sharpen.

In order to eliminate these drawbacks, the knife plate is made of a trough-shaped form with two pairs of oppositely located short cutting edges.

FIG. 1 shows the proposed knife, front view; in fig. 2 - the same, top view.

The knife includes long cutting edges 1 and two pairs of short cutting edges - right 2 and left 3.

Depending on the design of the chipper discs and the method of fastening, sharpening can be done both on the rear edges (Fig. 2) and on the front edges.

Thus, two pairs of short cutting edges are formed along the contour of a trough-shaped plate, which does not have time-consuming to make and sharpen a special protrusion. Contour cutting knife works as follows. When mounted on a right-hand disk of a spiral chipper, it works twice as a right (long KpoAiKH 1 cutting chips form thickness, and a pair of short cutting edges 2 lengthwise),

and when installed on the left disk, twice as left (edges 1 and 3 work).

Subject invention

Contour cutting knife for spiral chippers, made in the form of a plate with a long cutting edge, a protrusion with a short cutting edge and a fixing groove, characterized in that

In order to reduce the labor intensity in the manufacture and sharpening, the knife plate is made of a trough-shaped form with two pairs of oppositely arranged short cutting edges.