SU633675A1 - Apparatus for working keyways - Google Patents

Description

The invention relates to a mechanical design, in particular, to devices for fastening, positioning and machining products, for example, for milling the hobbing grooves on shafts.

Known devices of this designation are known, comprising a plmtu with clamps, centering elements and stops, and a drive for moving the plate relative to the centering elements of the plate,

The prior art devices have low productivity in sequential milling of keyway grooves located along the shaft to be machined at different distances from each other. Positioning is achieved by the drive of the machine table, which requires a significant investment of time and highly skilled workers, and also does not allow achieving the required machining accuracy.

In order to increase productivity and processing accuracy, the proposed device is equipped with a drive-related movement of the plate with a slide mounted on it with the possibility of rotation of spring-loaded dogs and placed between the plate and the RIDGE plate with windows for

dogs, and on the plate are made with processing positions protrusions for interacting with dogs. The plate is equipped with a drive to return it to its original position and a locking mechanism.

FIG. 1 shows the described device; in fig. 2 - the same, top view with local cuts.

The device is installed on the table of a horizontal milling machine (not shown). It contains a plate 1 movably mounted on the housing 2, clamps with centering elements in the form of spring-loaded centers 3 and pressing centers 4. On the side of the spring-loaded centers 3, stops 5 for products are fixed, in this case for two identical stepped shafts.

The pressing centers 4 with their transverse grooves are movably connected with the ends of the two shoulders lever 6 pivotally connected to the rod 7 of the drive 8 clamps.

Claims (2)

In case 2, a drive 9 for moving the plate 1 relative to centers 3 and 4 and a drive 10 for returning the plate to the initial position are located, opposite to the stem of which the bracket 11 is fixed on the plate. All drives of the devices are made with pneumatic cylinders. The actuator 9 through the rod 12 is connected with the slider 13. On the slider fixed rotary and spring-loaded dogs 14 and 15.. Plate 1 is provided with protrusions 16, 17 and 18 which are located in one row and protrusion 19 offset from them. The protrusions are located at different distances from each other in accordance with the processing positions, the protrusion 19 being more distant from the rest. In the housing 2, opposite the projections, a plate 20 is fixed with windows 21 and 22 for exiting and moving the dogs 14 and 15. On the plate 1 there is a reinforced bar 23 with grooves 24, and on the housing 2, opposite it, there is a fixing clamp with a wedge 25 and an actuator 26. The distances between the slots 24 correspond exactly to the working positions of the machining of the products. The products, in this case, the shafts, are installed in the centers 3 and 4. With the actuator 8 through the brush 7, the lever 6 and the centers 4, the machined shafts are pressed against the stops 5. Then with the drive 26 and the wedge 25 the plate 1 is pressed against the body 2. The machine table informs the device of a limited vertical lift, ensuring the interaction of the machined shafts with rotating mills (not shown in the drawings). After the key grooves have been machined, the table and the device are lowered, and the wedge 25 is retracted by the actuator 26, releasing the plate 1. Then the actuator 9 moves the slider 13 with the pawls 14 and 15 to the right through the rod 12 and out into the windows 21 and 22. the dog 14 engages the protrusion 16 and moves the plate to the next machining position. In this position, the actuator 26 and the wedge 25 plate 1 again pressed against the housing 2, and the actuator 9 returns the slider 13 with the dogs 14 and 15 in the original position. Then, the next row of key grooves is processed, successively moving the plate by the protrusions 17 and 18 to different distances corresponding to the next processing positions. After the next product processing cycle, the positioning of the plate 1 by means of the pawl 14 is completed. During the next positioning, due to the displacement of the plate 1 to the right along the window 22, the dog 15 for the protrusion 19 moves the plate to more than in any of the previous tea cases the distance for the same stroke of the actuator 9. As the plate moves to the right, the bracket 11 moves the actuator stem 10 to the extreme right. At the end of the processing cycle by the actuator 10 through the bracket 11 return the plate to its original position. Apparatus of the invention for machining keyways on shaft-type products, comprising a plate with clamps, centering elements and stops, and a drive for moving the plate relative to the centering elements, characterized in that, in order to increase productivity and precision of processing, the device is associated with driven by the movement of the plate with a slider mounted on it with the possibility of rotation, spring-loaded dogs and a plate with openings for dogs placed between the plate and the slider, and on the plate made in sponds with numerals processing protrusions for engagement with pawls, wherein the plate is provided with a separate drive to return to its original position and the locking mechanism. Sources of information taken into consideration at the examination: 1. M. Anserov. Adaptation for machine tools. L., 1975, p. 561 - 562. / g fff 3 5 IG 25