SU148218A1 - Deburring Machine for Rubber Parts - Google Patents

Description

Machines for trimming burrs from rubber parts are known, consisting of a rotor of non-periodic motion with rotating mandrels, cutting and shelling centers located along the perimeter of the rotor.

However, these machines do not provide the required quality of processing.

The proposed machines do not have this drawback. This is achieved by the fact that the cutting unit is made in the form of a pneumatic cylinder, on the stem of which a fixed frame is applied, carrying a spring-loaded tool holder and a pressure roller, designed to stabilize the part on the rotating mandrel. FIG. 1 shows the kinematic diagram of the machine; in fig. 2 - cutting device of the machine (in two projections).

The machine consists of a frame on which there is a round table 1 with twelve shpindles 2, rotating in ball bearings. Mandrels 3 with red-hot fingers are screwed onto the top of the spindles. The pins 4 are worn on the bottom of the spindles, six of which are connected to the pulley 5 of the electric motor with a V-belt through the pin 6 of the gearbox and the tension roller 7.

The twisting moment is transmitted from the pulley of the reducer to the worm pair 8, and then through the conical barrel 9 and the twelve Maltese gear 10 to table 1, which comes in periodic rotation with stops. The Maltese mechanism is fixed by a wedge 11 from a cam 12.

Details are put on fixed mandrels, the pulleys of which engage with the V-belt as the table moves. During the stopping of each mandrel under the cutting device 13, a three-way pneumatic valve 14 is actuated, driven by cam 15. Cutting device 13 fixed on the pneumatic cylinder stem lowers No. 148218-- 2 s and the knife breaks the burrs from the hole being machined. At the same time, the part is deposited to the level required for burrs.

After two strokes of the table, the rotating mandrel with the part stops against the emery wheel 16, rotating towards the part, which removes the outer burrs. Then, the mandrel with the parts stops near the vertical plate 17, which has a bevel in front at an angle of 10. The part, which is in contact with the bevel of the plate, rises on the mandrel, which facilitates its dropping by a spring bent along the profile of the mandrel.

The amount of overhang of the plate 77 is controlled by turning the handwheel.

This way you can achieve the necessary preliminary lifting of parts on the mandrel. Adjusting the departure plate is also needed when moving from one size of parts to another.

After dropping, the part falls into tray 19.

The cutting unit serves to trim the burrs from the hole with a flat steel knife, m. 20, inclined towards the part by 4-5 ° and 5-6 ° towards its rotation, which prevents the possibility of cutting the upper end of the part.

The knife 20, made with a flat face, is fixed in the grippers 21 and 22 of the screw 23. At the desired position, the knife is fixed by a screw 24 with a 1 spring 25, which is attached to the end of the L-shaped lever 26. The freely rotating roller 27 serves to eliminate large distortions parts admitted when putting on the mandrel. The nut 28 controls the amount of cutting device onuskan. A screw 29, with a tapered end, serves to change the size of the hole required for a smooth downward descent of the cutting device, which ensures high-quality cutting of burrs.

The cutting device, in addition to cutting the burrs, precipitates the details of the lower Blade of the knife to the same level, which is necessary for a high-quality roughing of the burrs with an emery wheel.

Subject invention

The machine for trimming burrs from rubber parts, consisting of a rotor of periodic movement with rotating mandrels, cutting and shelling nodes located along the perimeter of the rotor, characterized in that, in order to improve the quality of processing, the cutting unit is designed as a pneumatic cylinder, on the brush of which is applied a fixed frame carrying a spring-loaded tool holder, and a pressure roller designed to stabilize the part on the rotating mandrel. t9 18

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