SU1209429A1 - Device for clamping tool arbour - Google Patents

Description

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The invention relates to a machine tool industry and can be used to clamp tool holders in a spindle of heavy milling or boring machines.

The aim of the invention is to expand the technological capabilities of the device by using on heavy metal-cutting machines.

Fig. 1 shows a device, a longitudinal section / (the tool holder is clamped in the machine tool); figure 2 - section in figure 1.

The device comprises a cap cup mounted on spindle 1 consisting of a rotary part 2 and a holder 3, interconnected by means of a thread.

The yoke 3 has two inner shoulders, each with one set of springs 4 and 5 extending with one end. The other set of springs 4 rests on a nut 6 attached to the end of spindle 1, and the set of springs 5 abuts against a split ring 7 located between collar ribs 3 and interacting with the body of 8 ,. abutting the nut 6. In the cone of the spindle 1, the mandrel 9 is fixed with a flange that interacts with the keys 10 fixed in the slots on the spindle I end. On the mandrel 9 behind the fastener 11. The spindle 1 is located in the housing, 12 of the spindle unit of the machine. The swivel part 2 of the cup ring has internal projections 13 and 14.

The device works as follows.

When changing the tool, the tool holder is mounted at the end of the spindle 1 in a position where: the keys 10 of the spindle 1 and the grooves of the mandrel 9 are aligned, and the inner protrusions 10

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The points 13 in the rotating part 2 of the cap cup coincide with the fillets on the flange of the mandrel 9.

After the ring 11 with 5 insertion of the mandrel 9 into the spindle cone. 1 1 rests against the protrusions 13 of the rotatable part 2 of the cup. The latter is turned relative to the mandrel counterclockwise until the projection 14 stops against the key 10. In this case, the projections 13 will interact with the projections of the flange of the mandrel 9.

By moving the spindle I forward (Sleep-forward), the holder 3 is retracted to the left of the end surface of the bore in the body 12 of the spindle assembly of the machine. Thus, the sets of springs 4 and 5, affecting the inner shoulders of the cage 3, displace it relative to the 1ppinder I of the machine, producing a clamp of the mandrel 9 in the spindle 1 of the machine. -

After the machining of the part is completed, the spindle 1 with the mandrel 9 and the clamping device located on it is retracted all the way to the right end surface of the holder 3 in the bore of the body 12 of the machine spindle assembly. Upon further movement of the spindle 1 backward, the sets of springs 4 and 5 are simultaneously compressed, while the set of springs 4 is compressed directly by the nut 6, and the set of springs 5 by the nut 6 through the pushers 8 and the split ring 7.

At the end of the stroke of the spindle 1, the mandrel 9 is partially pushed out of the cone, the spindle due to the abutment of the rotary part 2 of the cup sleeve in the ring 1 1 of the mandrel 9 and its displacement together with the mandrel until a gap forms between the cones of the spindle 1 and the mandrel 9.

After turning the turning part. 2 on the thread in the holder 3 clockwise

Arrow up to the stop of the protrusion 14 into the tongue, js-ku 10, the mandrel 9 is released, and it is removed from the cone of the spindle 1.

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Claims (1)

DEVICE FOR CLAMPING A TOOL JOB into a spindle of a metal cutting machine, comprising a cap cup and an annular support element mounted concentrically and with axial movement relative to the machine spindle, and elastic elements mounted between the annular support element and the annular stop fixed to the spindle, characterized in that, in order to expand the technological capabilities of the device due to the use on heavy metal-cutting machines, the cap cup is made in the form of interconnected minutes threadedly rotating part and the ring gear, the annular support member - as formed in the cage front and rear flanges, wherein the device is provided disposed between the shoulders holder split ring mounted between the split ring and rear shoulder additional elastic elements _to and pushers mounted between ® annular focusing spindle and split ring in the holes made in the front flange. SU .1209429