SU535129A1 - Device for feeding the strip and tape material into the working area of the press - Google Patents

Description

pneumatic cylinder 23. Above the stop 18 in a fixed rack (Vertically mounted rod 24 with a roller 25, which is the slit of the rear end of the strip. 25 strip sensor 28, implemented in the form of a contactless end switch.

A pneumatic clamp 30 is installed between the die matrix 29 and the work rolls 2. A die 31 is located above the die, and (UNDER 1 wires 32, the space between which is a failed hole for waste.

On FI; G. 2 shows some of the ratios of the geometric dimensions and the feed flow:

 R

where L is the distance between the bend axes

roller and work rolls; GT is the yield strength; /: - elastic modulus; n - the magnitude of the lift stop; o is the material thickness, I and n – t, where:

i - feed step ;;

t, n are integers (are selected constructively); / - joint zone.

The device works as follows.

The pusher shaft 7 of the work rolls 2 is transmitted by a perpodic rotational movement from the pickup shaft 3 through the crank 4, the connecting rod 5, the rack and pinion transmission and the overrunning clutch 6. The lower shaft 7 of the work rolls 2 through the bevel gears 9 Drives the lower shaft 10 of the filling rolls 1. The upper shafts And and 12 are driven from the lower shafts 7 and 10. The shafts 7, 10, And and 12 are braked by the brakes 14 and are connected to the roll, by means of frictional clutches 16.

The banding is performed (manually or automatically) to the stop 18 of the docking mechanism extended by the extrusion 23 at the opening of the filling rollers 1 by the spring 17. At the same time, the lever 23, the upper arm of which has three no-strip slides somewhat out of the stop line, turns on the axis, and includes a lower arm sensor 21. The bending roller 20 with the extended stop bends the end of the processed strip up, and the next strip should be refilled immediately after the rear ends of the processed strip Ribbon fill rolls 1. The strip is clamped by an outer cylinder 16 of the upper roll drives.

When the stop 18 is extended and there is no processing strip, the rod 24, the upper part of which slides but the fork of the lever 26, under the action of the weight and the spring: moves down, and the screen 27 attached to the lever 26,

turns on the sensor 28. When the stop is lowered, the lever 19 fixed on it lifts the lever 20 and the rod 24- to the upper position. The command device b, which contains a limit switch that is turned on by a rotating screen (not shown in the drawings), has a protrusion at the TOiM loop location, which corresponds to the sensor 28, which indicates that the junction of the lanes turned out to be undesirable, dangerous from the point of view of further movement 32 zone. With the given ratios of geometrical dimensions, this protrusion is located in a cycle at the end of the nodachi stroke with some overlap of height,

and its value depends on the length of the undesirable zone, that is, on t - /.

If the sensor 28 is triggered when the limit switch of the controller 8 is on, then a delay occurs

focusing 18 on one cycle of the next lane, i.e., the abutment is retracted downward through the cycle, provided that the next lane is filled up to the abutment. In this case, the remainder of the strip continues to be processed and leaves the work rolls 2. The last step is incomplete. After it, waste is cut off, the length of which lies within the limits of the t- / value. The next step is again complete due to the fact that by this moment the starting into the matrix 29 begins

the remainder of the strip, filled with the front ends of the next.

The filling rollers 1 are closed simultaneously with the abutment of the stop 18 down and remain closed for several cycles until the strip passes into the matrix 29, and then it is opened. The speed of the filling rolls 1 is selected so that by the time of the end of the supply cycle of the front strip with an incomplete step, the filling strip enters the work rolls 2, and the filling rolls I have a speed slightly higher than the working ones.

If sensor 28 trips when the limit switch is off

of the commander 8, then the cycle of the re-swappable strip nodachi cycle (opening of the rolls and strip clamp by the pneumatic clamp 30) occurs after the abutment 18 is pulled down in order to bridge the gap between the two strips due to the movement of the filled strip only. The severed blanks are pushed by the punch 31 through the die 29 and fall onto the wires 32, which are moved along for further processing.

Claims (1)

Invention Formula Device for feeding the strip and tape material into the working area of the press, containing two pairs of rolls, the upper roll of each of which is associated with the lifting drive and between which the mechanism is located docking, characterized in that, with