SU1220808A1 - Lower ejector for vertical press - Google Patents

Description

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The invention relates to mechanical engineering, in particular to designs of lower ejector in presses.

The purpose of the invention is to increase reliability.

Fig. 1 shows schematically the ejector in the initial position before the ejection, a general view; in fig. 2 - the same, after ejection; in fig. 3 is a section A-A in FIG. one.

The ejector includes a flange 1 and a sleeve 2 associated with a slider (not shown), having the possibility of relative movement, in the cavity 3 of which a pusher 4 is placed, having a body 5, fixed to the bed 6, an emphasis 7 with notches 8 on the end face. In the flange 1 and the holder 2, curved channels 9 are formed, in which the balls 10 are placed. In the holder 2, a stepped hole 11 is made, in which a protrusion 12 is placed, made in one piece with the flange t. The protrusion 12 is provided with radial grooves 13 that coincide radially with recesses 8 at the end of abutment 7. Curvilinear channels 9 are articulated by outlets 1A and 15, respectively, with cavities 3 and 11. fingers 17. On the holder 2 fixed stops 18, and on the frame 6 still - pressure element 19.

The ejector works as follows.

When the press ram moves upwards, the flange 1 by means of a protrusion 12 and balls 10 in its grooves 13 acts on the cone 5 of the pusher 4, which, lifting, pushes the part out of the die (not shown).

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At the end of the stroke of the press ram and the movement of the flange 1 and the holder 2, the latter meets with its stops 18 with the pressure element 19 on the base 6. The holder 2 stops and the flange 1 continues to move upwards. In this case, the flange moves along the guides 17, compressing the spring 16 until the grooves 13 of the end face

10 of the protrusion 12 is not compatible with the outlets of the 15 curved channels 9. As a result, the balls 10 roll into the curved channels 9 and release the pusher 4, which is free

15 falls into cavity 3 until it stops 7. At the same time, out of the outlets 14 of the curved 9 channels 9, the balls 10 under the action of their own weight roll out and fall into the notches 8 (along

20 one ball in each).

As the press crawls downward, the flange 1 cuts off the balls 10, which are located in the recesses 8, and at the same time 25 the holder 2 returns under

the action of the springs 16 to its original position.

When the grooves 13 of the end protrusion 12 are combined with the recesses 8 of the stop 7 3Q, the movement of the flange 1 and the sleeve 2 downwardly stops, and the balls 10 located in the recesses B are retracted into the grooves 13,

Next, the ejection cycle of the parts is repeated,

The technical and economic effect of the use of the invention is provided by an increase in reliability as compared with the known device by ensuring the simultaneous contact of the flange with all the balls, eliminating their jamming.

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FIG 3

Claims (1)

A LOWER VERTICAL PRESS Ejector, comprising a housing connected to a slider with balls placed in its curved channels, mounted to interact with the latter, a pusher mounted on a bed, and an abutment with recesses at the end, and a pressure element fixed to the bed, wherein the curved channels are connected by exits with the cavity of the housing, characterized in that, in order to increase reliability, the housing is made in the form of a cage with an axial step hole and threaded sockets along iferea, a flange with a cylindrical protrusion and radial grooves on its end and peripheral holes, threaded fingers passed through the holes in the flange and articulated by threaded with these sockets, as well as a set of springs installed ® between the holder and the flange, while the protrusion of the latter is placed in the specified hole of the clip. SU_ ,, 1220808>