SU603571A1 - Honing machine - Google Patents

Description

(54) HONING MACHINE

one

This invention relates to mechanical engineering.

A known hotshngovalov machine, containing the mechanism for unclamping bars, associated with the rocker arm pressure mechanism, and the mechanism for dosing feed flj.

This machine has low productivity and is not reliable enough in operation.

The purpose of the invention is to increase the productivity of the machine ..

On the basis of this, in the proposed machine, the dosing mechanism is connected to the unclamping mechanism of the bars through a one-way stroke element and a spring-loaded lever, one arm of which is in contact q by the rocker of the pressure mechanism.

The drawing shows the kinematic scheme of the described machine.

On the spindle 1 with the 2 rotation drive, the hinging flax head 4 is used for machining the part 3, the bars 5 of which with their inclined surfaces are in constant contact with the taper 6 of the pusher 7. The upper end of the pusher 7 is through the ball 8 and the hinge 9 is connected with two shoulders lever 1О. Right

the lever arm 10 by the hinge 11 is connected with the rod 12 of the actuator 13, for example, a pneumatic cylinder, and its left plbcho by the hinge 14 and shackle 15 is connected with a nut 16 fixed from rotation and fixed in a fixed direction 17.

The sleeve 18, which is connected by a threaded end with a nut and freely mounted by the other end in the fixed sleeve 19, has a double hard stop 20 and 21 and is fixed by the handwheel 22. There is a gap between the handwheel and the end of the sleeve 19, corresponding to the maximum working turn when honing. The hard stop 2 O is in constant contact with the stop 23 of the rocker arm 24 of the mechanism 25 pressure of a penny. The balance beam is pivotally mounted on a fixed support 26. The second shoulder of the balance arm is in constant contact with the stop 27 of the two shoulders lever 28, spring loaded 29.

The lever 28 is rigidly connected to the movable part of the DA of the one-way travel element, made in the form of an overrunning clutch 31, and connected to the sensor 32, the Clutch 31 is connected

with the output of mech-33, metered feed containing a drive 34, for example in the form of a shgg-like engine. On the shaft 35 of the overrunning clutch, there is a rigidly mounted self-drilling worm wheel 36, connected through 37 and a second worm gear pair 38 and 39 with a metered-drive drive 34, for example, a stepper motor.

The element of one-way travel can also be made in the form of a ratchet mechanism or a friction controlled clutch. The actuator 34 may also be designed as a ratchet mechanism driven by a relative reciprocating motion of the workpiece and a honing head or with an autonomous drive. In addition, as a metered feeding mechanism, known metered feeding mechanisms containing a self-braking pair in the output link can also be applied.

When working with dosed feed include one-way travel. The mechanism 25 sets the required maximum pressure, and by adjusting the drive 34, the required metered flow.

The workpiece 3 enters the treatment area, the bars 5 of the honing head 4 are inserted into the machined hole of the part 3. A rotational movement is reported to the spindle 1 from the drive 2, the honing head 4 with bars 5 begins to rotate in the hole of the part 3. At this moment between the bars and the machined the surface of the hole has a technological gap, and there is no pressure on the bars.

Next, the actuator 13 will mix the rod 12 down. The hinge 14 is fixed, because screw 18 with its hard stop 20

pressed against the fixed sleeve 19 of the yoke and the initial pressure of the mechanism 25. Consequently, the lever 10 rotates the hinge 14 and through the hinge 9 communicates the movement of the pusher 7 in the direction of unclamping the bars 5 of the honing head 4. This movement selects the technologically clearance between the bars 5 and the workpiece 3. After the technological gap

between the bars 5 and the machined surface of the part 3 is selected, the movement of the pusher 7 is stopped and the lever 1O begins to turn on the hinge 9 which has become fixed, moving the lever arm 10 with the hinge 14 upwards. This movement through the shackle 15, the nut 16 and the fixed stop 20 of the screw 18 drives the rocker arm 24, which rotates on the support 26 clockwise, therefore.

right end of rocker arm 24 is lowered down. In doing so, the lever 28 under the action of the spring 29 begins to rotate counterclockwise. The overrunning clutch 31 does not interfere with this movement, since in this direction it has a free course. The movement of the screw 18 together with the stop 20 is limited to the stop 21 and is equal to the size of the gap O. When the stop 21 approaches the sleeve 19, the rotation of the rocker arm 24 and the lever 28 is stopped. By this time, the sensor 32 is turned on and gives the command to turn on the set operating pressure in the pressure mechanism.

At the time of rotation of the rocker arm 24 to the lever 28, the honingosani process has already begun, but with a small initial pressure. After turning on the sensor 32, the pressure rises to the set value of the operating pressure. As the allowance is removed under the effect of this pressure, the lever 10, turning on the hinge 11, which has become fixed through the hinge 9 and the ball light 8, moves the pusher 7 and through the cone 6 expands the bars 5. At the same time, the hinge 14 moves down, and the yoke The 24 strips turn counterclockwise. This overturn is prevented by the overrunning clutch 31. However, as soon as the sensor 32 is turned on, the actuator 34 starts to work, performing a metered flow. Through the worm gear 39, 38, 37, 36, the clutch 31 begins to rotate clockwise, ensuring that the lever 28 rotates in the same direction under the force of the mechanism 25 transmitted through the rocker arm 24. Thus, the drive 34 reports the metered feed - the process is in progress honing

With optimal dosed flow, the pressure of the honing stones corresponds to the set working pressure. In the event that the feed dosing values exceed the actual removal allowance, the working pressure between the bars and the surface to be machined is also equal to that established — in fact, the honing process will go with not constant feed, but with constant pressure. In the event of a decrease in the dosage against the intake, determined by the established pressure, the honing process will proceed with a pressure, determined by the amount of the dosage

At the end of the honing, the stop 20 reaches the sleeve 19. After this, no pressure is transferred to the bars 5 - the nursing period begins.

The honing process ends, for example, from a time relay or a cycle counter, and all elements of the device are radio-