DE355211C - Cutter head with knives arranged at an angle to its axis, stored in individual recesses in the tool body and secured against longitudinal displacement by a common clamping element - Google Patents

Description

DISPENSED
ON JUNE 23, 1922

CLASS 49 a GROUP

(St 32037 I \ 4ga?)

in Berlin-Marienfelde.

secured knives.

Patented in the German Empire on May 27, 1919.

The invention relates to a cutter head arranged obliquely to its axis, in Individual recesses of the tool body and stored by a common clamping member Knives secured against longitudinal displacement. From known similar designs the new one differs in that the knives have clamping ends, which are right-angled or approximate! right angled surfaces extending to the tool axis are limited and are clamped between the clamping element and the tool body, whereby at the same time the longitudinal displacement and rotation of the preferably round and enveloped by the body Knife is prevented. This results in an extremely simple one, consisting of a few parts existing strong construction and easy knife replacement.

The knives are particularly advantageous in a concentrically enclosing the clamping screw, in the axial direction of the tool body adjustable ring mounted, def fully encloses each knife. By moving this ring, the knives be adjusted, the above mentioned, the displacement and rotation of the Surfaces that prevent knives in the company act as guide surfaces.

Three exemplary embodiments of the subject matter of the invention are shown in the drawing.

Fig. Ι is a vertical center section through a non-adjustable embodiment of the new tool,

Fig. 2 is a plan view of the tool of Fig. 1;

Fig. 3 is a corresponding central section through an adjustable embodiment of the new tool;

Figure 4 is a plan view of the tool of Figure 3;

Fig. S is a vertical central section through an ^{embodiment corresponding to Figs. 3 and 4, but 1 designed} as an attachment tool;

Fig. 6 is a plan view of the tool I according to Fig. 5.

On the work- ' which can be rotated around the armpit-B. tool body α , the ring η is attached. This is provided with cylindrical bores b , which are inclined in radial planes to the axis AB \ . The cylindri-! see knife inserted. The body α has an axial bore / which receives the threaded bolt thread of the screw serving as a clamping element for the knife, while the head i of the clamping screw enters the further bore h of the ring η .

The knives d are provided with angled recesses k , the flat bottom m of which, directed perpendicular to the axis AB , serves as a support for the lower surface of the screw head i that clamps the knives and at the same time holds the ring η on the body α . The flat contact surface p of the knives is pressed by the screw head i against the flat end face q of the body α, which is perpendicular to the axis of rotation AB. Because the planes m and p are not at right angles to the axis of the knife d , any rotation of the knife d in the bore b is prevented with certainty, so that the cutting edges must maintain their correct position.

As can be seen from what has been said, the new tool according to Fig. 1 and 2, apart from the blades to be provided in any number, consists of only three parts, namely the body a, ring η and clamping screw g, i.

Parts a and 11 of this can optionally be combined into a single piece. The tool is therefore just as easy and cheap to manufacture as it is reliable and shake-free in use.

In the embodiment according to Fig. 3 and 4, the knives d are adjustable. For this purpose, the ring housing η is adjustable by means of a nut thread on a bolt thread 0 of the body α in the direction of the axis of rotation AB .

If, after loosening the clamping screw i, g, the housing η is screwed upwards or downwards, the knives d are thereby moved inwards or outwards with the guidance of the surfaces p on the surface q , whereupon they are fixed in the newly set position by tightening the clamping screw will.

The tool according to Fig. S and 6 differs from that according to Fig. 3 and 4 only in that it is designed as an attachment tool. For this purpose, the body a is, as usual, designed as a sleeve, the central bore r of which can accommodate a spindle or drill rod. Accordingly, the clamping screw g, i is replaced by a cylindrical nut j which can be screwed onto a stepped bolt thread t of the body α.

The angle at which the axes of the knife d stand to the axis of rotation AB is arbitrary.

The pitch of the thread of the clamping screws g or j is such that an automatic tightening occurs when the cutter head is working.

For thread cutting, the knives of the new tool can also be used as thread combs be formed, so that the tool in its entirety is a tap represents.

The new tool can also easily be used to replace a side milling cutter by placing several rings one behind the other in such a way that the Cutting their knives overlap.

Claims (3)

Patent Claims: 1. Cutter head with knives arranged obliquely to its axis, mounted in individual recesses of the tool body and secured against longitudinal displacement by a common clamping member , characterized in that the knives have clamping ends which have surfaces extending at right angles or approximately at right angles to the tool axis («, p) are limited, and that these clamping ends are clamped between the clamping member (g, i, s) and the tool body (a) , whereby the longitudinal displacement and rotation of the knife is prevented at the same time. 2. Cutter head according to claim 1, characterized in that the knives have recesses which are delimited by surfaces lying parallel and at right angles to the tool axis and rest with a flat surface (p) perpendicular to the tool axis on a corresponding surface (q) of the tool body. 3. Cutter head according to claim 1 and 2, characterized in (Fig. 3, 4) that the knife (d) are mounted in a ring (s) which concentrically surrounds the clamping screw (g _} i) and is adjustable in the axial direction of the tool body, which fully encloses each knife. 1 sheet of drawings.