SU70360A1 - Machine for cutting bevel gears with curved teeth - Google Patents

Description

The invention relates to a machine for cutting bevel gears with curved teeth by cutting heads using running-in movements in both directions for carrying out the cutting process with an accelerated dividing movement of the workpiece after the end of the cutting of each tooth.

According to the invention, for the purpose of automating control of the running-in movements, a roller included in the kinematic chain of running is used, carrying a nut serving for axial movement of a screw equipped with two stops, one of which is intended to act on the change-in lever of the running-in movement in one direction and the second to switch moving the run-in in the other direction and for influencing the turn-on lever to move the running-in to break the run-in chain for the time of the dividing movement of the workpiece.

FIG. 1 shows a general kinematic diagram of the machine, and FIG. 2 - constructive space29 Code c. 3

A schematic diagram of the mechanism for automatic control of machine break-in movements.

On the table 5 of the machine placed the head 2, the spindle / which is designed to install the workpiece. Table 3 can rotate around the vertical axis 00, thereby making a portable movement of the running-in. The entire running-in mechanism and an automatic device for controlling the movements of the machine are placed inside the table 3. Instrumental headstock 4 is fixed on the crosspiece 5, which is mounted on racks 6 and can be moved up and down to set the tool relative to the workpiece. The head itself, as well as the tool spindle drive, in FIG. 1 is shown conditionally. The headstock 4, in addition to the working movement of the cutting, must provide the installation movements of the movement, as well as the existing machines of this type.

The spindle / heads 2 can be tilted at any angle to, horizon, and also move with the head to obtain the desired position of the workpiece when 449

The direction of movement of the table is left. From this moment the left turn of the table begins.

The change in the size of the running-in arc is made by changing the distance between the stops 16 and 17 by rotating the screw 15 with the left and right thread, on which both stop nuts are seated.

Subject invention

Claims (3)

1. A machine for cutting bevel gears with curved teeth by means of a cutting head with working machining movements in both directions, characterized in that to automate motion control of the running-in, a roller 7, carrying a nut / 3, used for axial movement of the screw 15, provided with two stops 16 and 17, of which the stop 16 is intended to act on the running-movement lever 27 in one direction, and the stop 17 is intended to switch the running-in movement in another direction and to Actuate the running-in lever 23 to break the running-in chain for the time of separating movement blanks. 2. The form of execution of the machine according to claim 1, so that the lever 24, kinematically associated with the roller 7, is used to act on the lever 23 in order to activate the running-in mechanism at the end of the divisional movement of the workpiece. 3. The form of the machine according to paragraphs. 1-2, characterized in that for adjusting the run-in path, the lugs 16 and 17 are made in the form of nuts movable along the screw 15. one turn of the wheel Zi billet turned on 1 tooth. After the wheel makes one revolution, the machine turns on the clutch A. From the moment the dividing process ends and the joint rotation of the table and the workpiece begins, i.e. the working run. The mechanism for automatic control of the running-in movements (Fig. 2) aims at changing the direction of rotation of the running-in and dividing the rotation of the workpiece. The roller 7 is equipped with a screw with a nut 13 having a spike 14, which covers the neck of a screw 15 carrying two stops 16 and 17 which are made in the form of nuts. 17. As the roller 7 rotates, the nut 13 moves longitudinally, and with it also screws 15 with stops } 6 and 17 {screw 15 does not rotate in this case). Couplings A, B and C on the rollers 7 and 18 sit on the slits. Gears Zj, Z.7 and Zi8 on rollers 7 m 18 sit g freely on bushes, and gear Zjs jammed on roller 18. The single teeth A and C have end screws TOBi, i.e. projections 19, which transmit the rotation of roller 7 from zipper tooth Zi, moreover, in the case of rotation in the direction of the arrow D, clutch A is working, and during reverse rotation - clutch C. plug 23 and thereby turns off the coupling / 3. The automatic control mechanism works as follows. In the rightmost position, the table with clutch B turns off the gear Zis and turns on the gear Zn. The rotation takes place in the direction indicated by arrows E and F. The screw on the roller 7 moves the nut 13 to the left, and with it the screw 15 and the stops 16 and 17.: In the position shown, the figure on FIG. 2, the tooth 20 of the stop 17, meeting with the protrusion 21 of the bar 22, deflects the plug 23, turning off the muff, that A, which causes the rotation of the roller 7, and therefore the screw Zi3 and the table 3, to stop 29 axis 00. At this time there is an accelerated rotation of the workpiece around its axis, i.e. division. At the moment when the roller 7 stops, it stops its rotation and the clutch C, as it sits on the slots of the roller 7. The gear Zi, continuing the rotation, with its end screw lug retracts the clutch C, and with it the L-shaped lever 24, which with its end it lowers the bar 22, osvobozhda latest from engagement with the tooth 20, which is why coupling A under the action of the spring 25 again meets with the gear Zi. As the latter rotates, their face screw surfaces, slid one out over the other, finally meet with their protrusions 19, the entrance to the clutch. At this point, the rotation of the roller 7 is resumed, and with it the screw, i.e., the run-in continues. At the same time, the clutch C under the action of the spring takes its original position. Thus, the division of the workpiece into one tooth occurs during one complete rotation of the Zi swag. After this, the running-in stroke begins. During this time, the tooth 20 of the stop 16 approaches the protrusion 21 and, meeting with it, turns off the sleeve A, the workpiece divides into the next tooth. Further rotation leads to the meeting of the tooth 29 of the stop 16 with the protrusion 26 of the fork 27; with clutch B, gear Zje is turned off, and gear Zn is engaged, thereby starting the reverse rotation of the running-in chain. When moving the table to the right, there is no need to divide by a tooth, as it was prepared at the end of the left turn. With the right movement of the table, the nut 13 and the stops 16 and 17 move from the right. At the same time, the teeth 20 of the stops 16 and 17 meet the projection 21 with their bevels and, having overcome the force of the spring 28, lower the bar 22, we have no effect on the plug. At the end of the table move to the right, the tooth 30 of the stop 17 switches the sleeve B, t451