SU1365460A1 - Pneumatic device for monitoring presence and location of parts in working position of die - Google Patents

Abstract

The invention relates to devices for controlling the presence and location of parts at processing positions. The device allows to expand technological capabilities and increase reliability in operation. The device is equipped with a tee with two holes, a jet tube, and the nozzle is made in the form of two concentrically placed tubes forming an ejector. In the absence of a controlled part in the working position, the compressed air passes freely through the ejector, which forms a vacuum, and the pneumatic-electric relay does not work. Otherwise, the relay signals the presence of the workpiece in the working position. 3 il.

Description

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The invention relates to the processing of metals by pressure and can be used to control the presence and location of parts in the working position, in particular in the electronics industry to control the presence and correctness of the location of parts in dies, in robotic forgings, RTChK-3 complexes, and details in the fights of industrial robots or at work positions in front of them.

The goal of the present invention is to expand the device's logical capabilities and increase its reliability.

FIG. 1 shows schematically the proposed device, general view; in fig. 2 - ejector; i) a of FIG. 3 - tube attachment unit to the washer.

A pneumatic device for controlling the presence and location of parts in the working position consists of an ejector tube 1 connected at one end with a flexible tube 2, and the other with a flexible tube 3 with a sensitive pneumo-electric relay 4.

The bending tube 2 is connected to the tee 5, the jet tubes 6 of which freely enter the holes of the matrix 7. Springs 8 are placed in the slots of the matrix 7, the caps of which support 9 serve. The retaining tabs 10 force the tubes 6 to the tested part, which fixation carried out with the help of catchers P. A punch 12 is placed above the matrix 7 (shown conventionally).

The ejector tube 1 consists of two concentrically placed tubes 13 and 14. The tube 13 is smaller in diameter than the tube 14. Compressed air is supplied to the ejector through the tube 15.

The controlled part 16 is located between the catchers P. In the absence of the controlled part 16, the ends of the jet tubes 6 for the average sizes of the parts protrude by 0.5-0.8 mm from the working surface of the punch 7. Washer 10 (see Fig. 3) at the expense of spring-loaded petals, it rigidly fixes the jet tubes in a definite upper position. The washer 10 is made of spring steel 65G with a thickness of 0.2-0.3 mm. The force of the spring 8 should be insignificant, but sufficient to overcome the friction force of the tube 6 in the die channel in order to constantly maintain it in the upper position.

The operation of the device is as follows.

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When air is supplied under pressure, 2-1.5 kg / cm into the tube 15 of the ejector 1, the air freely passes through the tube 2, the tee 5 and the jet tubes 6 to the outside.

In this case, a vacuum is formed in the tube 13 due to ejection, which does not trigger the pneumatic relay 4. If there is a part 16 in the die 7, the tube 6 closes and the air flow rate in the tube 1 changes dramatically, the pressure in the tube 13 rises and 3 is transferred to the relay 4, - it is triggered, signaling the presence and correct location of the part 16. If the part went wrong, for example, one edge fell on the safety device P, one of the jet tubes 6. will be opened and the air flow in tube 1 will not change, but in tube 13 will be saved vacuum, relay 4 does not work and therefore, the press does not work. The breeder adapter (tee) is designed so that resistance to air flow is minimal. The channels for the passage of air are made at an angle of not more than 30 °.

Thus, having one device, it is possible to have a different number of jet tubes and to control the presence and correctness of the location of controlled parts of any geometric shape at certain points at the same time.

The test of the proposed device gave positive results when installing it on the arms of the robot. Moreover, the length of the jet tubes should not exceed 1 m (otherwise, the response time of relay 4 is significantly increased).

Claims (1)

Invention Formula A pneumatic device for monitoring the presence and location of parts in the working position of the chip, containing a source of compressed air with a nozzle connected to a jet tube leading to the working position of the device, as well as a control sensor, which in order to expand technological capabilities and increase reliability it is equipped with a tee with one inlet and two outlets, an additional jet, a tube that goes to the working position of the device, the nozzle is made in the form of two concentrically placed cutting, forming an ejector, which is connected with the diffuser inlet tee and with its outlet apertures connected ink tube, working the ends of which are mounted for vertical movement. ff 13