SU1286435A1 - Vertical press lower pusher - Google Patents

Abstract

The invention relates to the field of metal forming, in particular, to devices for ejecting parts from strains. The aim of the invention is to expand the technological capabilities of existing press equipment due to the fact that it allows for multi-stage punching on presses of simple operation. The device for ejecting parts from the punch comprises a lower ejector 1 connected by means of a lever 6 to an axis 4. On the axis 4 there are internal clips of electromagnetic friction clutches (M). The outer cage of one M is driven into rotation from the press ram by means of a rack and pinion pair. The outer cage of the other M is mounted on the press frame 9. On the press 9 frame, the sensors 10 are mounted. The checkbox 13 of the sensor 10 is fixed on the axis 4. When the press ram goes up, the checkbox 13 comes in contact with the sensors 10, then one M turns off M includes. Thus, after shifting the lower ejector 1, the lower ejector does not rise up together with the press ram, but does not lower, but remains in an intermediate position necessary for the position of the part at the beginning of the next transition. 1 hp ff, 2 ill. Y (L

Description

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The invention relates to the processing of metals by pressure, in particular for the ejection of parts from dies.

The aim of the invention is to expand the technological capabilities of the device by ensuring that the part is ejected from the die in several strokes of the press ram.

FIG. 1 shows a kinematic diagram of the device, top view; in fig. 2 - the same, front view.

A device for ejecting parts from a punch contains a lower ejector L, electromagnetic friction clutches 2 and 3, each of which is rigidly seated with one of its own | clips, for example internal, on the axis 4, made in the form of the knees of the shaft, and a rack and pinion pair with gear 5.

The lower ejector 1 is connected with the axis 4 by the lever 6. The outer cage 7 of the coupling 2 is made integral with the gear 5 of the pinion gear pair. Outer holder 8 of the coupling 3 is mounted on the frame 9 of the press. Also on the base 9 of the press mounted sensors 10-12. The number of sensors corresponds to the number of stamping transitions. If I1tampovka is two-junction, then 2 sensors are installed, three-junction - 3, etc. The box 13 of sensors 10-12 is mounted on axis 4. In addition, on the base 9 of the press is mounted sensor 14, which interacts with the rail 15, rigidly fixed - Noah 16 on the slide 16 press 17.

The device works as follows.

In the initial position, i.e. before the beginning of the first transition, both clutches 2 and 3 are open, so when the press ram goes down, the outer cage 7, vras, and together with the gear 5 of the pinion gear pair, does not pass the axis 4. At the time of reaching the slider press the bottom dead center of the rack-pinion gear rack pair 15 comes into contact with the sensor 14 and gives the command to turn on the clutch 2.

At the press ram, upward torque is transmitted to axis 4. Rotating the latter through lever 6 raises the lower ejector 1, which. This way the part is pushed out of the die. Upon reaching the flag 13 of the sensor switch 10, the latter gives the command to turn off

clutch 2 and engaging clutch 3. Due to the fact that clutch 3 is closed, axis 4 remains stationary, and therefore the lower ejector 1 remains in the position it reaches at the moment of switching clutches.

After the slider has reached the top dead center, the second transition begins. All the above operations are repeated with the exception that at the lower dead point the coupling 3 opens and the coupling 2 is turned on and the lower ejector 1 starts its movement up, not from the bottom dead center, but from the position in which it appeared after the end of the first transition . After the final stamping of the part and its removal from the stamp zone, for example by air-blowing (not shown), the command is received to disconnect both sleeves 2 and 3 by the upper sensor 12, and the lower ejector 1 returns to its original position under its own weight.

Claims (2)

1. Lower ejector of a vertical press containing a pusher placed in the table of the press, connected to the press ram by means of two-link intermediate assemblies, each of which includes a lever and a pull, as well as a means of connecting the rod with the lever and mounted on an axle frame , on which the inner race of the coupling is mounted, and the outer race is connected by means of a rack and pinion to a traction, distinguished by the fact that, in order to expand technological capabilities, each intermediate assembly is equipped with An additional clutch mounted on the same axis with the main clutch and rigidly fixed to one of the clips on the press frame, and the ejector equipped with at least one clutch switching sensor mounted on the press frame, the flag of which is located on the axis of the coupling clutch. 2. Pusher according to claim 1, characterized in that electromagnetic clutches are used as the main and additional couplings. 2