SU440244A1 - Tumbling device - Google Patents

Description

The invention relates to the machining of parts and is intended for continuous tumbling of parts having various shapes and sizes, including thin plates, nails and needles.

A non-continuous tumbling device is known, made in the form of a hollow drum with a number of end walls of a certain height. However, when tumbling, small parts, thin plates, nails and needles are wedged in the gaps between the surface of the rotating auger and the drum.

To increase the quality of the tumbling of parts, the drum, which has two rotational speeds, is made of preparatory, several tumbling and unloading chambers, which communicate with each other through windows located in the mouths of the truncated cone attached to partitions.

FIG. 1 shows schematically a tumbling device with a partial longitudinal section, general view; in fig. 2 shows a section of the drum along A-A in FIG. I during the tumbling of parts (slower speed); in fig. 3 is a section along the line A-A in FIG. 1 during the overloading of parts from one chamber to another (greater speed).

The tumbling device consists of a frame 1 on which a two-sided electric motor 2 is installed, receiving commands for a certain activation time from the relay 3 times and transmitting rotation through the gearbox 4, gears 5 and 6 of the tumbling drum 7 tilted to the unloading side, in the inlet neck which is installed obliquely loading tray 8. The drum 7 consists of a preparatory chamber 9, several tumbling chambers 10 and an unloading chamber 11. The chambers are separated from one another by partitions 12 with a neck fixed on them mi 13, having the shape of a truncated cone.

The chamber 9 is divided into two compartments by a disk 14 having cutouts 15 in the drum-forming unit for passing the parts into the next chamber through the window 16, opposite which the blade 17 is inclined, serving to lift and drop the parts into it. There are no 9 blades in the left section of the chamber to reduce the intensity of the tumbling. Tumbling chambers 10 are made in the form of two sections - a section of a screw gate 18 consisting of several turns, the outer diameter of which is attached to the generator drum 7, and the inner one - on a hollow cylinder 19 located inside the drum, and a section 20 intended for tumbling equipped several blades evenly spaced around the circumference

21, one of which is located against the window

16 and serves to overload parts (at greater speed) into the next chamber. The last turns of the screw bolt 18 are interconnected by blades 22.

Such a design of the screw bolt 18 excludes the possibility of moving the parts forward (towards the drum tilting) while the latter rotates at a higher speed, since the blades 22 move the parts into the third quarter of the drum circumference, which, moving along the inclined surfaces of the turns, go back and at a lower speed of rotation of the drum, the parts are dropped into the fourth quarter of the drum circumference and, moving along the inclined surfaces of the coils, are directed forward (towards the tilt of the drum) to tumbling separated It is 20. From the last tumbling chamber 10, through the window 16, the parts enter the discharge chamber 11, and from the latter, with the aid of pockets 23, fall onto an inclined discharge tray 24 mounted on the frame, and from the tray into the container.

The parts to be tumbled along the loading chute 8 are fed into the preparatory chamber 9 of the drum 7. tilted unloading in turn. In this chamber the parts are kept until the drum receives a high rotational speed using a relay 3 times, which gives the command to switch to a two-speed engine 2, and the latter through the gear 4 and the gears 5 and 6 tells the rotation of the drum. At higher speeds of rotation of the drum blade parts

17 rise up and under their own weight along a certain path fall into the window 16, located in the neck 13. Slides along the inclined inner surface of the neck 13, the parts fall into the compartment of the screw shutter 18 of the tumbling chamber 10, the volume of which is larger than the volume of parts received from the preparatory chamber 9. In the compartment of the screw bolt 18, the parts are held back from axial movement forward (toward the inclination of the drum 7) by means of blades 22, which drop them into that part of the drum circumference where the turns of the screw bolt 18 have a bias towards the load (back). When the drum 7 receives a lower rotational speed (tumbling speed), the same blades 22 begin to dump parts into that part of the drum circumference (fourth quarter), where the turns of the screw shutter are inclined towards unloading (forward), and the parts for two or three turns of the drum 20 shafts are moved to the compartment,

in which, due to the presence of blades 21, tumbling occurs intensively within a specified time, for example, ten minutes. Such processing of parts is performed simultaneously in all the tumbling chambers 10. After a predetermined tumbling time, the drum 7 is associated with a high rotational speed, for example, for thirty seconds, at which the parts are transferred to the next chamber, for example, to the unloading chamber 11, from which the otglovanny parts pockets 23 are lifted and dumped on the inclined discharge chute 24. The residence time of the parts in the tumbling drum, and hence the time of the tumbling, can be varied over a wide range by means of e time.

Changing the amount of departure of the tray 24, the number and size of the pockets 23, you can get the output of parts per unit of time in such a quantity in which they enter the drum.

P ip e d 1m et inventions

Claims (5)

1. A continuous tamping device made in the form of a hollow drum inclined in the direction of unloading with a series of annular partitions of a certain height, characterized in that, in order to improve the quality of tumbling of parts by changing the tumbling time over a wide range, the drum has two speeds of rotation It is made of preparatory, several tumbling and unloading chambers, which communicate with each other by means of windows located in the truncated cone-shaped necks attached to partitions. 2. The device according to claim 1, characterized in that the preparatory chamber is divided into two compartments by a disc having cutouts in the drum-forming unit for passing the parts when overloaded to the next chamber through a window opposite which the blade is inclined, serving to lift the parts into him 3. The device according to claim 1, characterized in that the tumbling chamber is made in the form of two compartments — a separation of a screw shutter consisting of several turns, the outer diameter of which is attached to the generator of the drum, and the inner diameter to the hollow cylinder located inside the drum, and a compartment designed for tumbling, equipped with several blades evenly spaced around the circumference, one of which is located opposite the window and serves to transfer parts (at a higher speed) into the next chamber. 4. The device according to claim 3, characterized in that, in order to keep the parts from moving forward along the drum as it rotates at a greater speed, the last turns of the screw gate are connected between each other by the blades. 5. The device according to claim 1, characterized in that, in order to communicate the drum with two rotational speeds, a two-speed engine is used, which receives a command for a certain on-time from a time relay. 11 1317 12 Q18 22 21 i; iLllI 77, j V oU.,.  F f h -G 23