DE76671C - Saw filing machine - Google Patents

Description

IMPERIAL

PATENT OFFICE?

a /

The present invention consists in a machine for saw filing, by means of which it is made possible by the combs that attach themselves to the inclined surfaces of the teeth when filing or remove burrs.

The saw teeth are sharpened by means of a file corresponding to this purpose, which is held in place by the two clamps η and is thus firmly connected to the push rod α. This push rod a, as can be seen from the drawing (Fig. 1 view and Fig. 2 cross-section), has a square cross-section in the middle, but a round cross-section at both ends, which has the advantage that the file can be placed obliquely according to the dental script .

The push rod α is guided in metal bearings b and c arranged in the cast iron frame of the machine. The working movement is brought about by the arrangement of a connecting rod / which is connected on the one hand to the push rod through the ring e and on the other hand to the crank B by means of a bolt g . The metal bearings b and c have a margin upwards and are only held down by a helical spring a ^l , but can be adjusted to any height by means of adjusting screws attached on both sides.

On the flywheel shaft a gear i ^{2 is} keyed, which is ^{in engagement with the gear d 1} on the crank axis, which ^{v has} the purpose of reducing the speed of rotation of the crank compared to that of the flywheel and the push rod BEZW. File to give a working speed appropriate for its purpose.

This sheet is clamped in the cast iron frame by means of the jaw m, against which the clamping jaw? « ^{1 is moved} by a screw w ² and is also fixed by the bolt m ³ .

The two jaws η for holding the file are on the angular part of the push rod a . connected by bolts.

A prismatic guide is cast on the base on which the rail rests can be a support by spindle with handwheel, the respective diameter of the to. Sharpening saw blades are moved up and down accordingly.

When sharpening circular saw blades, the blade with its hole is rotatably attached to the support (Fig. 2), while the vice is only slightly tightened so that the blade can be rotated. When sharpening band, hand or similar saws, the fork ρ (Fig. 4) is clamped in the support so that the rollers r attached to both ends come to stand under the vice jaws and therefore for the blade to be filed and set offer a firm and secure support.

The locker can consist of a simple, flat lever, fork-shaped at the bottom, which is rotatable at point b ² and moves back and forth from the crankshaft through an eccentric rod b ^{l, the fork-shaped lower end performing the twist.} The cabinet's work surface is made of cast steel and is also interchangeable thanks to the arrangement of a dovetail. At the top of the cupboard

a screw Z is attached, by means of which the clamp χ is adjusted resp. the restriction can be made stronger and lower if necessary.

The control or transport mechanism is set in motion by a guide rod i movably attached to the eccentric rod b '. As can be seen from Fig. 3, this guide rod i is connected to a lever i ¹ , which is rotatable about point y and on which the slotted lever i ^{2 is} movably attached.

If the machine is set in motion, the guide rod i moves forward as a result of the eccentric movement and rotates lever i ', whereby the slotted lever vor- or. is pushed back, which has the consequence that the shaft / _{2 of} the transport lever h to vor- or. is moved backwards. The transport lever is rotatably mounted at the point e ² and carries at its lower end, the control or transport claw o. When the lever is moved back h, he pushes with its lower part BEZW. with the claw ο the saw blade forward one tooth, whereupon the spring g ¹ pushes the lever back automatically. The lever can be set by means of the screws k and k ^l so that it controls more or less, as dictated by the writing on the saw blade.

A scale can also be attached to the claw to make the lever easier and easier more convenient to adjust.

When sharpening, the teeth are given a comb on their inclined surface next to the tip or ridge which gives the tooth a dull, imperfect texture and to the makes a significant contribution to the early failure of the saw. To the ridge immediately after the To eliminate sharpening of the saw, the following facility is in place ..

Are Sämmtliche teeth of the saw sharpened (with ridge), so it provides means of screws, the bearing of the connecting rod α somewhat in height, so the file DAF now by the oblique edge of the newly sharpened tooth projecting slightly (about ι mm).

Then you tighten the screw k ^{1 of} the transport device a little, and so much until the claw o the saw moved so far or. has turned so that the inclined edge just mentioned is back on the file; In doing so, however, the steep edge of the neighboring tooth lying next to it is removed from the file, so that when work is now started again, ie filing, only the inclined edge of the teeth is sharpened and the burr on it is removed.

Claims (1)

Patent claim: Sawing filing machine, in which for the purpose of removing the on the upper tooth edge while filing forming crests or ridges the file by tightening the bearing screws, of the attendant push rod (a) is first lifted from the oblique tooth edge, and then by adjusting the screw (k ¹⁾ " the transport device the inclined tooth edge is guided back into the file and thereby simultaneously the steep edge of the neighboring tooth is lifted, so that during the work that now takes place the file works the inclined edges of the teeth alone and removes the ridges or burrs. For this purpose ι sheet of drawings.