SU1245380A1 - Arrangement for unwinding coils of metal band - Google Patents

Description

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"1245380

The invention relates to the field of automation of auxiliary operations in the stamping of parts from a tape, in particular to devices for unwinding a roll during stamping on automatic presses.

The purpose of the invention is to increase reliability by simplifying the design of the drive.

FIG. 1 depicts a pre-expandable device, a general view; FIG. 2 is the same side view; in fig. 3 shows section A-A in FIG. 2

The device for grinding the rolls of a metal tape contains a rack I5 on which a roll holder arranged in the form of a disk 2 is placed, and a mechanism 3 for clamping a roll 4. The disk 2 of the roll holder is fixed on the shaft 5, to which the blades 6 of the air motor 7 fixed on the rack are rigidly connected one.

- In the case of the air motor 7 there are two openings B and C. The opening p serves to supply compressed air entering through the pneumatic unit 8 and the pipe 9 to the air motor 7. The hole C serves to discharge the exhaust air into the atmosphere through the pipe 10 and the hole E of the pneumatic distributor 11.

Pipeline 12 is connected to pipeline 9, which is connected to the pneumatic i distributor 11. Pipe 2 serves for the oncoming supply of air through the pneumatic distributor: 1 I to the air motor port C. The tape from the roll 4 is directed to the input press feed mechanism 13 through the tanga 14, which is connected to the pneumatic distributor 11.

The device operates as follows.

When air is supplied to the opening &, the non-electric motor 7 blades 6, the shaft 5 and the roll holder disk 2 begin to rotate. At this time, the air pressure at the air inlet to the air motor 7 is regulated by the pneumatic unit 8, depending on the feed rate of the tape, so that the rate of gathering of the tape from the roll holder is slightly higher,

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than the feed rate of the tape in the working area of the press. The loop of the tape begins to increase, the rod 14 is lowered and the valve 1I starts to cross the vent opening T) and supply air to the opening C of the pipeline 12. At the same time, the air supply to the opening b also does not stop. Air pressure on the blades

air motor 7 begins to equilibrate, the rotation of the blades slows down, the compensating loop is reduced, and the rod 14 rises. The pneumorass associated with the rod, preheater 1I, begins to shut off the air supply to the opening C and opens the opening B to discharge the exhaust air from the opening C to the atmosphere. At the same time, the blades 6 begin to rotate again at the initial speed, jointly rotating through the shaft 5 to the roll holder.

Thus, in the process of operation, the rotational speed of the roll holder is continuously controlled by the pneumatic motor 7, which prevents the coil holder from jerking,

The adjustment is paid by the fact that at a constant supply of compressed air to the opening ft at the air motor inlet, depending on the position of the rod 14 controlling the size of the compensation loop, the air outlet C is connected to the pneumatic modulator 11 by means of a pneumatic distributor 11. atmosphere, or to a source of compressed air. In the latter case, the air motor 7 is braked by the backpressure of the compressed air at the outlet channel C.

The design of the proposed device is simplified in comparison with the known electromechanical actuators by eliminating the electric motor, the friction clutch and the pneumatic brake with its control cylinder.

The economic effect of introducing g of the invention is provided by reducing the metal consumption and operating costs.

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Compiled by A, Ezhev Editor L. Gratilo Tehred G. Gerber Proofreader M, Demchik

3942/6

Circulation 783 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5

Production and printing company, Uzhgorod, st. Design, And

Claims (1)

DEVICE FOR UNWINDING BALLS OF METAL TAPE, containing a roll-mounted holder in the form of a disk with a roll clamping mechanism, a roll holder and a mechanism for adjusting the compensation loop in the form of a roller for contact with the tape, associated with the roller · rod and pneumatic distributor associated with the rod connected to a source of compressed air and atmosphere, different. in order to increase reliability, the roll holder drive is made in the form of a pneumatic rotary engine with input and output channels, the shaft of the latter is rigidly connected to the roll holder disk, the input channel being directly connected to a source of compressed air, and the output channel being connected to a pneumatic distributor.