DE750899C - Corrugated wire bending device for the production of curved corrugated wire by means of a split press die - Google Patents

Description

Wel.ld wire bending device for the production of curved wire Corrugated wire by means of a split press die. I The invention relates to a device for the production of bent corrugated wire springs with a thickness of up to about 5 mm which corrugates a straight wire in one operation and at the same time closes the waves be curved in an arc.

The invention relates to improving a known device for bending corrugated wire to form arch springs in the sense that arching and the Deriving the finished corrugated wire is easier and safer.

To form the upper arch of a wave, the patrix is around a press finger extended, the corrugated wire to the side of the wave forming Presses the die finger and so bends the front end of the wire downwards, whereby .this-es End or the shaft already produced in a slot connected to the male mold runs in with spread strips and is thus bent over. When the wire end runs in in the slit between the splayed bars is made by the gradual closing the pressed parts .the front end of the wire in the inclined surfaces that are increasingly facing each other approaching ledge edges forced in and bent.

In .der drawing the new embodiment of the device is for example shown.

Fig. R and 2 show the new device in the closed position the pressing point with bent corrugated wire.

Fig.3 illustrates the additional inclined guidance of the corrugated wire with the bend in the wire wave viewed from the front.

Fig.q. , and 5 show the pressed parts halfway through their movement . Against each other with corrugated wire not yet bent, from the side and from the front seen.

The known bending device consists of a pressing tool z and the associated two-part. Die 2, 3. The two parts can . In the sense of the arrows a-, y are shifted against each other, and also can the two. Die parts 2, 3 perpendicular to this also move relative to one another. These are movements that any machine tool suitable for this purpose with corresponding Control devices are executed.

According to the invention, there is an additional finger 4 on the pressing tool i attached, which adapts to the finger 5 of the die. When going down it bends Finger 4. Either the first wire end coming from the right down or he sets the wire bend produced on the finger 3 after the intermittent advance of the Wire firmly in the die on finger 5.

The wave generated by the bend 6 on the finger 5 forces the front one Wire piece 14 ″ in the slot 12 of one of two spread strips 8, 9 Bending device 7, the one bar 8 according to Fig. 2 and 4 from the plane of the Bar 9 runs out at an angle. Both bars are with opposing sloping surfaces io, i i provided.

When the tool is open, the wire is stepped from right to left advanced (Fig. i). When the pressed parts i and 2 are closed, the front end runs 14 "of the wire straight into the wide open slot 12, as shown in Figs. 4 and 5 evident. With further movement of the pressed parts, the crossing point shifts 15 of Fig. 4 to the intersection point 16 of Fig. 2, then the front end of the wire is forced to bend out of the tool plane on the inclined surfaces io, i i, so that there is a small curvature in the shaft.

Claims (2)

PATENT CLAIMS: i. Welldrahtbiegevorrichtun.g for the production of curved corrugated wire by means of a split press die, characterized in that an additional finger (4), which adapts to the wave curvature and which adapts the front wire end (14Q) to the memorial (die) on the press tool (male mold) the side presses, and a bending device (7, 8, 9), which presses a small bend in the corrugated wire when the press die (1, 2, 3) is closed, are arranged. 2. Apparatus according to claim i, characterized in that the bending device for the curved corrugated wire spring from z @ vei spread fingers (8, 9) or the like, consists, between which the wire (14) slides on inclined surfaces (1o, ii).