SU432980A1 - SPINDLE TURN AUTOMATIC - Google Patents

Description

one

The invention relates to the processing of metals by cutting and is intended to process workpieces of the shaft type simultaneously from two sides when clamping and unclamping the workpiece without stopping the spindle rotation.

Known spindles for simultaneous machining of shaft ends with a centrally located work clamping mechanism.

The purpose of the invention is to install and remove the workpiece without stopping the spindle.

This is achieved by the fact that the clamping mechanism is made in the form of two simultaneously driven pulleys, one of which is provided with centrally symmetric internal profiled surfaces acting on two shoulders levers mounted on the other pulley and interacting through a wedge mechanism with clamping prisms located in the diametral groove of the same pulley.

FIG. Figure 1 shows the spindle of a turning automat. In the position “Clip, view by connector; in fig. 2 - spindle of the automatic lathe in the field “Razzhim, view on the connector; in fig. 3 shows a spindle section along A-A in FIG. one.

The spindle has a flange 1 and an expanding pulley 2 and is placed in bearings 3, which are located in a split housing 4. Between the flange 1 and the expanding pulley 2 there is a clamping

pulley 5, which can freely rotate at a certain angle. The clamping curves 6 are designed to transmit force when the clamping pulley 5 rotates relative to the drive brake (shown not shown) of the expanding pulley 2 through the levers 7 on the wedge 8, the purpose of which is to clamp by moving the sliders 9 prisms 10 of the workpiece 11.

At the hall, the pulley 5 is braked through the V-belt drive from the drive, turns and takes the position shown in FIG. 2. The clamping pulley 5 has ledges 12 acting on the levers 13, which squeeze the wedge 8, and the sliders 9 under the action of centrifugal forces occupy the position shown in FIG. 2. On the axles of the levers 7, counterweights are fixed to balance their centrifugal forces 14. The centrifugal force from the counterweights 14 is designed so that through levers 7 an additional salient force is transferred to the workpiece 11. Expansion curves 15 are designed to turn clockwise when the counterweights 14 return during the braking of the clamping pulley 5 by acting on the axles 16 pressed into the counterweights 14 and retracting the levers 7 to the position shown in FIG. 2. Razzhimny

curves 15 are shaped this way.

In the unlocking position, the component force from the centrifugal forces of the 14NWs did not return the clamping pin 5 to the clamping side. In order to exclude a proton-free dropping of the cln 8 between the sliders 9 and the inserts 17 (which is possible when stopping the sniper pin), on the axles of the levers 13 are mounted the earrings 18, which, under the action of the springs 19, create a constant tension with a clamping jiKHTUiM 5. 8 and snarls 13. The levers 7 are leveled in the axles 20 and with the shoulder 21 abutted into the cylinders 8. The incisors 22 are laid out but both sides of the pinch.

The device works as follows.

A blank 11 of the type "shaft" is fed into the prisms 10, when they are in the position shown in fig. 2. The drive torque through the V-belt transmission is not affected by the clamping clamp 5, which is turned counterclockwise. The expansion pin 2 at this time is not involved in direct rotation, as it is briefly (within 0.2 sec) braked by the drive.

The clamping curves 6 act on the levers 7, which turn in the pins 20 n with the shoulder 21, press the wedge 8. The centrifugal forces from the counterweights 14 additionally press the wedges 7 through the levers 7 to the center and the prisms 10 clamp the workpiece 11, to which two sides are supplied by incisors 22, which groove the ends of the blank 11 from both sides simultaneously.

Since the torque is transmitted

Only through the clamping jaw 5, and from it through 3S1J11D1: curves 6 to the levers 7, the clamping force of the workpiece 11 is maintained automatically depending on the cutting force. As the cutting force increases, the torque increases and, in proportion to it, the clamping force.

After completion of processing, clamping jaw 5 is disconnected from the drive rotation and

briefly (within 0.2 sec.) is braked, and the transmission of torque is switched to the clamping jaw 2. The clamping jaw 5 rotates clockwise and, abutting with ledges 12, into the levers 13,

unclamps the workpiece 11.

The bale change is automatically carried out and the cycle repeats.

Subject invention

Spindle of automatic lathe for simultaneous machining of shaft ends with centrally located work clamping mechanism, characterized in that, for the purpose of installation and workpiece without stopping, the clamping mechanism is made in the form of two simultaneously driven pulleys, one of which is provided with centrally symmetric internal profiled surfaces, acting on the billet, levers mounted on another pulley and interacting through the wedge with a sliding mechanism with clamping prisms located in diametral groove addition

same i1-kiva.