DE207213C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 207213 CLASS 67a. GROUP

PIERRE ADRIEN KUSTNER in GENEVA, Switzerland and GEORGE SONNENTHAL in LONDON.

Patented in the German Empire on December 22, 1907.

The invention relates to a machine which is used in particular for grinding side milling cutters or similar tools, the cutting surfaces regularly arranged in a circle 'own, serve.

The drawing illustrates the new machine in an exemplary embodiment. .

Fig. Ι is a side view and

Fig. 2 is a plan view of the machine.

FIGS. 3 to 6 serve to explain the How the machine works.

In the machine frame α , a shaft b is arranged, which receives an emery disk δ ¹ and a drive belt pulley b ^2. A slide c is displaceable on the sliding bed a ^{1 of} the frame α. The same is moved back and forth by a hand lever d rotatably fastened to the frame λ , in whose sliding slot d ¹ a slider c ¹ fastened to the slide c enters. A round table f is rotatably mounted about a pin e on the carriage c. This carries at the same distance from its center and at the same distance from each other pin f ¹ , on which a pawl g rotatably attached to the machine frame acts (Fig. 2). The pawl g is held in its normal position by a spring g ¹ which presses on the arm g ² and which presses the arm against a fixed pin g ^3. At the table circumferential grooves _ / ² at equal distances are provided, into which the end of a Hemmstange A accesses, which is slidable in a c on the carriage tight console yer ^. The rod A is constantly pressed against the table circumference by spring h ^{1 (Fig. 1).}

A bolt A ^{2 is} attached to the rod A, around which a double lever A ^{3 can be} rotated. This has at one end a roller A ⁴ which runs on a guide A ⁵ rigidly attached to the frame u . At the other end of the lever A ³ , a spring A ^{6 is} provided, which tries to press this lever arm against a pin A ^7. The latter is attached to a disk 'seated ^{on the bolt A 2.}

The carriage c is shown in FIG. 2 in its central position.

If the lever d is moved in the direction of the arrow, the carriage c is moved until it hits the stop screw i. During this movement, the roller A ^{4 reaches} the bevel of the guide piece A ⁶ , whereby the spring h ^{6 is} given the opportunity to bring the free end of the lever A ³ against the stop pin A ^7. If the lever d is then moved back, the roller A ^{4 runs} onto the guide A ⁵ and thereby pulls the restraint rod A gradually out of the table notch / ² . On further rearward movement of the lever d and c of the carriage remains the Hemmstange A in its retracted position until the roller A ⁴ A ⁵ by the guide, has expired. In the meantime, the pin / ¹ lying next to the pawl g strikes it, whereby the table / is rotated so much that the rod A snaps into the next following groove f ² when it runs off the guide piece. The table f is thus fixed again the next time the carriage c moves forward. During the fixing, the lever A ³ assumes the inclined position according to FIG. 2 again.

On the table / a support k is arranged, which is also rotatable about the 'pin ■■ e ^. The support k is connected to the table '; / by two diametrically arranged elastic couplings. Each of these consists of a pin f ³ which is fixed in the table / which enters a slot k ^{1 of} the support k . In the latter, a spring k ^{2 is} provided, which is supported on the one hand against the support k and on the other hand against the pin f ⁸ . The upper part of the support k ends in a sleeve k ³ (Fig. I) with an internal thread; The tool holder I is screwed into this sleeve. The upper part of this cylindrical holder Z is divided into a number of upright lamellae I ¹ by several vertical radial incisions. A screw m with a conically tapering collar is screwed into a hole in the tool holder I , so that when it is screwed into the holder, the conical collar enters a corresponding conical recess at the ends of the lamellae I ¹ and drives the lamellae Z ¹ apart evenly , whereby the side milling cutter pushed over the slotted part of the tool holder is clamped.

To the extent of the support k are equal

A number of triangular vertical cutouts £ ⁴ arranged at intervals. The number of these cutouts & * corresponds to the number of grooves Nuten / ² or pins f ¹ .

Just before the carriage c hits the screw i , a tooth η of a rod engages in these cutouts, which is slidably but not rotatably mounted in an arm 0 which is rigidly attached to the machine frame α and which also receives the screw i. The rod carrying the tooth η can be adjusted by means of the bolt w ^2.

The operation and handling of the machine is as follows:

■ · The milling cutter is clamped on the tool holder I and a table / and a support k, both of which have as many cutouts / ² and pins / ¹ or cutouts Ä ⁴ as the milling cutter has teeth, are arranged on the bolt e of the carriage c .

Then the lever d is moved in the direction of the arrow (Fig. 2). Shortly before the movement of the carriage c is complete, the tooth η touches the left oblique side of the cutout

■ A ⁴ as shown in FIG. Fig. '4 indicates the corresponding position of the side milling cutter ft

and the relative position of the ^ ScBSur ^ TscEeiBe b ¹ _ to him. During the last part of the movement of the carriage c , the tooth η located in the section Ä ⁴ rotates the support k, j whereby the springs k ^{2 are} compressed (FIG. 5). The surface of the cutter tooth to be abraded comes into contact with the emery disk (Fig. 6). *

If now the lever ä is moved back again; begins the sanding disk ^1, b ¹ due to the reverse movement which k the support by the biasing force of the compressed springs A ² is given by the router to remove. During the backward movement of the carriage c, the table / support k and the milling cutter ft receive a switching rotation corresponding to the tooth pitch of the milling cutter, as has already been explained, so that the next forward movement of the carriage c is used to machine the next milling cutter tooth.

The rotary movement of the support k can be regulated in the most precise manner by means of the screw w ² on the rod of the tooth η.

Claims (4)

Patent Claims: i. Machine for grinding cutters or similar tools, where the Workpiece holder guided against cue grinding wheel by means of a hand lever and at each backward movement is peeled by one tooth pitch, characterized in that that the tool to be ground by a small angular movement, which the tool carrier towards the end of the forward gear of the to-and-fro sledge that carries him ^: comes into contact with the grinding wheel. . 2. Machine according to claim 1, characterized by a reciprocating carriage ' (c) with a rotatable table (f) and a rotatable support (k) which is fastened thereon by means of springs and which, when the forward movement of the carriage (c) is terminated, is adjustable Angular movement to the table ff) is given by an adjustable tooth (n ) acting on the inclined surfaces of cutouts / A ⁴ J of the support (k). " -3. Machine according to Claims 1 and 2, characterized in that the table (f ) carrying the support (k) experiences a rotation corresponding to the tooth pitch of the milling cutter in a known manner with each return of the reciprocating slide (c). . . 4. Clamping device for the workpiece of the machine according to claim 1, characterized by a hollow, perpendicular. Slotted mandrel (I), the lamellae of which are spread apart by a screw (m) with a conical collar. 1 sheet of drawings