SU912303A2 - Device for sorting articles by outer diameter - Google Patents

Description

(54) DEVICE FOR SORTING DETAILS ACCORDING TO OUTER DIAMETER

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The invention relates to measurement technology and can be widely used in mechanical engineering for sorting cylindrical, conical, spherical parts and, in particular, for sorting parts such as disks.

According to the main author. St. No. 755328, a device for sorting parts by diameter, containing a feeding tray, two sorting rollers mounted in a housing in a horizontal plane, transporting augers coaxial with them in the form of helical springs mounted with a possibility of installation, a receiving tray unit placed under the sorting rollers, and an actuator one..

However, this device is characterized by insufficient performance and sorting accuracy.

A prerequisite for achieving the necessary sorting accuracy in a known device is the presence of springs with minimum pitch, ensuring the installation of transportable parts in a plane transverse to the axis of the sorting rollers with a minimum lateral clearance between the part and the coils of the springs.

At the same time, the use of such springs worsens the conditions for dropping parts into the helical grooves due to the insignificant transit time of the latter under the feed tray, as a result of which the sorting performance is reduced. However, with an increase in shining, the lateral gap between the coils of the springs and the part being transported increases, which worsens the sorting accuracy due to their bias from the frictional forces, at which the outer diameter of the part cannot be measured, since the latter is located in the plane inclined to the axes of the sorting. x rollers. Thus, it follows from the above that the known device does not provide high performance while maintaining the necessary sorting accuracy.

Another disadvantage of the known device is the frequent wedging of parts between the walls of the feed chute and the coil of springs with a small distance between

20 end of the tray and springs. Increasing the distance between the feed chute and the coils of the springs eliminates jamming of the parts, however, the loaded part takes an unstable position and becomes tampled with the further rotation of the springs.

The aim of the invention is to increase productivity and sorting accuracy.

This goal is achieved by the fact that in the device for sorting parts according to the outer diameter, the ends of the helical springs adjacent to the feed tray are made in variable pitch with decreasing it in the direction of movement of the parts and with variable diameter with increasing it in the direction of moving parts.

FIG. 1 shows a diagram of the device; in fig. 2 - the same, top view; in fig. 3 - screw spring.

The device contains installed in the housing 1 with a calibration gap 2 sorting rollers 3 and 4, equipped with screws. Springs 5 and 6 with through screw grooves 7 and 8, feed tray 9, unit receiving trays 10 and 11 and drive 12. Sorting rollers 3 and 4 are rotatably mounted in one direction, and coil springs 5 and 6 rotatably with respect to the rollers towards each other. The initial sections 13 and 14 of the coil springs 5 and 6 are made with a variable clamp, varying from the maximum t, y, ax from the entrance side of the parts 15 to the screw grooves 7 and 8 to the minimum trnin passing to the constant tag t of subsequent turns of the springs.

The coils of the initial sections 13 and 14 of the springs with the maximum pinch tmax are made with the minimum outer diameter Dtnin, and the coils with the minimum pinch tmin are made with the maximum outer diameter passing into the simple outer diameter D Dmax of the subsequent turns of the springs.

The device works as follows.

Parts 15 of the feed tray 9 enter the screw grooves 7 and 8 of the initial sections 13 and 14 of the springs. At the same time, the parts 15 fall into the spring grooves, the turns of which are made with a maximum clamp, providing the maximum time for these grooves to pass under the feed tray 9. During the transportation process, the parts 15 move into the screw grooves with a minimum schm. washer rollers.

The presence of coils at the ends of the springs with the maximum pitch ensures the passage of the screw grooves under the feed tray for the maximum possible time, which is a significant part of the time of one revolution of the coil. This allows

to rotate the proposed springs with a significant number of revolutions, at which the maximum sorting performance is achieved.

The presence of coil springs on subsequent sections with a minimum spike, which transforms into a constant pitch of the springs, ensures the installation of parts in the screw grooves with a minimum lateral clearance of 0.05 ... 0.2 mm. Installation of parts in the screw grooves with a minimum side gap and eliminates their distortion during transport and thereby improves the sorting accuracy.

The implementation of the end sections of the coil springs with a variable outer diameter additionally increases the performance and reliability of the device by approximately 5-10% due to the reduction of the time for sticking of parts in the screw grooves.

Claims (1)

Invention Formula A device for sorting parts by outer diameter by ed. St. 755328, characterized in that, in order to increase 3i productivity and sorting accuracy, the end parts of the helical springs adjacent to the feed tray are made with variable pitch, decreasing in the direction of movement of the parts, and with a variable external diameter, increasing in direction of movement of parts. Sources of information taken into account in the examination / 1 USSR Author's Certificate No. 755328, cl. B 07 C 5/06, 1981.  . f 7 / :% Y ai