SU1323350A1 - Machine for working parts with free-flowing abrasive - Google Patents

Abstract

The invention relates to the abrasive machining of parts of complex configuration. guration and can be used in mechanical engineering. It provides improved processing performance. The device contains a working chamber 1, in which polishing drums 3 are installed, which are made in the form of hinged rigid shutters, which internally carry elastic shells and form a closed space connected to a source of pressures. The valves 23 are connected by rods 25 to pneumatic cylinders 26. The centers on which the parts are mounted are hollow and arranged in drums 3 with eccentricity. 2 hp f-ly, 5 ill. (L cpuel

Description

The invention relates to mechanical engineering and can be used for finishing abrasive machining of parts such as bodies of revolution, mainly with the external surfaces of a complex profile.

The aim of the invention is to increase the productivity of the process.

Figure 1 shows the device, a general view; figure 2 - section aa in Fig, 1; fig.Z - node I in figure 2; Fig, 4 - section BB in Fig.Z; on fig.Z - polishing drum, incision,

The proposed device contains a working chamber 1 with an abrasive, a control panel 2, polishing, drums 3, a gas distribution chamber 4, a magazine 5 with a slam-shut 6, a drive 7 with a grill 8, an actuator 9. Hollow cones 10 on which the workpiece 11 is mounted , are spring-loaded and are connected via rods 12 to one of the three rollers 13, which are rotatably arranged in the roller 14. The rollers 13, provided with a toothed crown, are in a constant end

tact with the surface of the hole 15 of the plate 16, which is rigidly mounted on the shaft 17. On the rollers 14 mounted gears 18, which are in constant engagement with the sun wheel 19 of the planetary mechanism, which is rigidly mounted on the hollow shaft 20, and electromagnets 21. Shaft 17 It is connected with a drive 9 by a belt drive 22. The polishing drum 3 consists of hinged rigid shutters 23 that internally carry elastic shells 24. The shutters 23 are connected by rods 25 to pneumatic cylinders 26. The cavities 27 are connected to the working feed system pressurized medium (not shown) by holes 28. The rotating parts of the device are protected by the covers of the working chamber 30.

The proposed device works as follows.

From the store 5, the cut-off device 6 delivers the part 11 to the position a of loading into the chamber 4 against the stop (not shown). The polishing drums are told to move around the axis of the shaft 17, while they are alternately in the opened state (the flaps are diluted) immersed in the working chamber 1 (position A, fng.), Where the abraO

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ziva. When the axes of the cones 10 coincide with the axis of the part of the relay, the electromagnet 21 turns off and the spring-loaded cones clamp the part 11. The pneumatic cylinders 26 close the doors 23 of the polishing drum 3. At the same time, the part 11 is in a closed volume filled with abrasive and air. As a result of running the gear wheel 18 along the sun wheel 19 eccentrically installed relative to the axis of the gear wheel 18, a hollow cone 10, and rotating it around its own axis when the rollers 13 with the gear ring running over the surface of the hole 15 of the faceplate 16, the part 11 performs a complex planetary process rotational motion.

The abrasive is pressed against the surface of the part by feeding the working agent under pressure through the holes 28 in the cavity 27 between the flaps 23 and the elastic shells 24 of the working drum 3.

At the same time, the air inside the polishing drum is displaced into the atmosphere through the side walls of the working chamber,

In the unloading position B, the pneumatic cylinders 26 open the flaps 23 and the part 11 with an abrasive enters the grid 8, where the abrasive is sifted through its openings into the chamber 4, and

the finished part goes into

the collector 7; Next, the polishing drum B of this state is moved to the loading position A.

The corresponding pressure to the working agent during processing is set depending on the material being processed and other technological parameters, which allows removing a given amount of the seam allowance and obtaining the required surface roughness.

The operation of the device is terminated by pressing the Stop button on the remote control 2 or by the switch mounted in the shut-off device after processing the last part.

Claims (3)

Invention Formula 1 "A device for processing parts with a free abrasive, containing a working chamber in which planetary-rotating holders with centers are placed, and a gas distribution chamber with a gas distribution grid, characterized in that the device is equipped with polishing drums in the form of a hinge mounted double-walled flaps, internally made of elastic material, forming a closed space connected to the source, pressure, and the center is hollow and mounted eccentrically in the drums. 2. The device according to claim 1, characterized in that the ends of the drums are made of porous material 3. The device according to PP.1 and 2, about t - characterized by the fact that the eccentricity is chosen within (mm): 0.03 5. 22 (pue.Z 18 74 B b FI.5 Compiler L.Karelina Editor L.Povkhan Tehred A.Kravchuk Proofreader V.Vut ha Order 2912/18 Circulation 715 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow5 Zh-35 Raushsk nab, 4/5 Production and printing company, Uzhgorod, Projecto st., 4