SU1291259A1 - Arrangement for pushing parts from male die of two-impact cold header automatic machine - Google Patents

Abstract

The invention relates to the processing of metals by pressure and makes it possible to expand the technological capabilities of the device. The punch holder 1 has an ejection mechanism made in the form of a sleeve 5 with an internal annular groove placed in the sleeve of a hollow push rod 7 with radial through grooves located circumferentially and spring-loaded relative to the push rod 9 with a radial groove placed in the push cavity. In the slots of the pusher mounted fixing elements 12. 1 C. p. f-ly, 3 yl. c (L to; oh jv CD

Description

The invention relates to the processing of metals by pressure, in particular to devices for ejecting parts from a punch of a two-stroke cold-extractor.

The aim of the invention is to expand the technological capabilities of the device.

Fig. 1 shows a punch holder from the side of the matrix j in Fig. 2 - section A-A in Fig. 1 (in the position of the first strike, pre-landing) J in Fig. 3 - the same in the position of the third impact, final landing.

The device consists of a punch; the holder 1, in which the punch 2 of the pre-landing and the punch 3 of the final landing are installed. In the punch 3 of the final landing, there is an ejector 4. In the hole of the punch holder 1 there is a sleeve 5 with an internal annular groove 6, in the sleeve 5 there is a hollow plunger 7 in which radial through grooves 8 are inserted. In the hollow pusher 7 there is a rod 9 which is spring-loaded relatively it is spring 10. On the rod 9 is hollow on the groove 11. In the slots 8 of the pusher 7 there are fixed locking elements 12, made in the form of balls, which interact with the outer surface of the rod 9. In the punch holder 1 is also hinged a lever 13 is installed, one end of which interacts with the ejector 4 and the other with the pusher body 7. In the matrix block 14, the dies 15 and the stop 16 are installed. The ejector 4 is designed to interact with the part 17. The sleeve 5 is axially possible; movement, which is fixed by a nut 18. To the sleeve 5 is attached the sleeve 19.

The device works as follows.

When making a first strike (pre-landing), the punch 2 mounted in the punch holder 1 approaches the matrix 15. Together with the punch holder 1, the piston rod 9 of the push-pull mechanism 9 begins to interact with the stop 16. With further movement forward the rod 9 moves and together with it the pusher 7 moves, as they are connected by balls 12, mounted

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in the groove of the rod 9. When moving, the pusher 7 acts on the lever 13, which is at the other end in contact with the ejector 4, moving it and thereby removing the part 17 from the punch 3, since the stroke of the punch holder 1 is greater than the required stroke of the ejector 4, then a reliable ejector on a stroke length equal to the length of the part to be planted in the punch, the movement of the pusher 7 together with the rod 9 is carried out only on the indicated length. During this movement, the pusher 7 moves up to its stop in the sleeve 19, in which the balls 12 are located opposite the annular groove 6 of the sleeve 5. Upon further movement of the rod 9 forward, the balls 12 exit into the annular groove 6 and disconnect the pusher 7 from the rod 9, after which the rod 9 moves freely, compressing the spring 10. After the first blow is executed and the workpiece is removed from the punch 3, the punch holder 1 moves up to the position for the second blow. The spring 10 thus returns the plunger 7 to the position in which the groove 11 of the rod 9 is located opposite the annular groove 6 of the sleeve 5, and the balls 12 take their place in the groove 11. When performing the second stroke, the ejector 4 encounters the workpiece, moves back and through the lever 13 acts on the pusher 7, moving it together with the rod 9 and the balls 12 to its original position, after which the landing cycle is repeated. When changing the length of the part located in the punch 3, the amount of movement of the ejector 4 is changed by moving the sleeve 5 with the annular groove 6.

Claims (2)

1. A device for ejecting parts from a punch of a two-impact cold-set automatic machine containing a lever hinged on a punch holder, the first arm of which is installed with a possibility of interacting with the ejector, and the second is kinematically connected with an ejection mechanism, characterized in that. device pushing mechanism is made 312 in the form of a sleeve installed in the punch holder with an internal annular groove placed in the sleeve with the possibility of interaction with the second arm of the hollow pusher lever with radial through grooves located along a circumference located in the cavity of the pusher and the stem springed relative to it with a radial groove, while in the slots of the pusher are placed. locking elements installed with the ability to interact with the rod. 2. The device according to claim 1, which has a lid that the sleeve with an internal annular groove is installed with the possibility of axial adjustment movement. Editor O. Golovach Compiled by V. Buzhinsky Tehred I.Popovich Proofreader G. Reshetnik. Order 77/12 Circulation 583Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 fig.Z