SU553032A1 - Bar bending machine - Google Patents

Description

(54) DEVICE FOR BENDING BARS

one

The invention relates to the field of metal forming, in particular, to devices for bending rods.

A device for bending iruts is known, comprising a wire feed mechanism, cut and bend 1, connected by a common drive shaft.

The disadvantage of such a device is that it is not possible to manufacture rods with a shaped loop at the end, which are used in the manufacture of transortable tapes.

Nowadays, in the manufacture of transporting belts, the manufacture of bars with a shaped loop at the end is carried out using manual operations.

The aim of the invention is to extend the technological capabilities of the device for bending rods by making rods with a loop at the end used for conveying leites.

This is achieved by the fact that the device for bending rods, containing wire feeding, cutting and bending mechanisms connected by a common drive shaft, is equipped with a shaped loop forming mechanism consisting of a die and a punch. Moreover, the matrix is made of two cheeks with gaskets installed between them with a notch corresponding to the shape of the lower part of the loop, and turning

the dental sector associated with the drive shaft, and the punch includes a rotary conical plug, also kinematically connected with the drive shaft.

FIG. 1 shows the kinematic scheme of the device; in fig. 2 - mechanism for forming a shaped loop; in fig. 3 - the same, section A-A of FIG. 2; in fig. 4 - bend mechanism; in fig. 5 - the same, section bb FIG. four; in fig. 6 to 9 are successive stages of forming a shaped loop.

The device contains the mechanism straightening 1; a wire feeder consisting of feed rollers 2, a four-stage mechanism 3, a ratchet wheel 4 and a dog 5; The wire cutter has a fixed knife 6 with a hole for the wire and a movable knife 7 mounted on the lever 8 in contact with the cam.m 9. The mechanism of the bend of the wire (Fig. 4 and 5) includes the brackets 10, axis 11, which A gear 12 is installed on the rolling bearing, having a bar 13 on the lower end for bending the end of the wire around the protruding shaft of the axis 11. On the cutter 10 there is a stop 14 of the shaped loop forming mechanism (Fig. 2 and 3) consisting of a collecting matrix and a punch.

The assembled matrix is made of two cheeks 15 and 16, between which the toothed sector 17 and the gasket 18 are installed with a notch corresponding to the lower part of the loop. The toothed sector 17 is fixed on the axis 19. The cheeks 15 and 16 are centered on the guide pins 20 and fastened to the frame of the device by bolts 21.

The cheeks 22 are movably mounted in the cheeks, on one side of which there is a brace 23, and on the other side there are springs 24 and a rigidly mounted plunger 25 with a swiveling conical fork 26.

The pinion 12 of the wire bending mechanism is connected to the camshaft 27 via the cam 28 and the ram 29.

The rods 22 connect the punch 25 to the cam 30 via the lever 31.

The gear sector 17 of the matrix is kinematically connected to the cam 32 via the rack 33, and the novil conical fork 26 is connected to the cam 34 via the rack 35 and gears 36-40.

The device works as follows.

The wire passes through the straightening mechanism 1 and the feeding rollers 2 is fed through the hole in the fixed knife 6 into the bend mechanism, where the bar 13 on the gear 12, which receives a reciprocating rotational movement from the camshaft 27 by means of the cam 28 and the ram 29, the end of the wire. bent 180 ° (Fig. 6). Thereafter, the folded end of the wire is fed into the die, where the shaped loop is formed in the following manner.

The protrusion of the cam 30, approaching the roller of the lever 31, rotates it around the axis and with the help of the rods 22 moves the punch 25 to the left, pressing the folded end of the wire to the notch in the gasket 18 having the shape of the lower part of the moldable loop (Fig. 7). After this, the protrusion of the cam 32, approaching the roller of the split rail 33, moves it to the right. The toothed rack engages with the toothed sector 17 and, when moved to the right, rotates the sector counterclockwise. Turning around its axis, sector 17 inserts the bent end of the wire into the slot of the cone-shaped plug 26 (FIG. 8). Then the protrusion of the cam 32 comes off the roller of the toothed rack 33 and returns the toothed sector 17 to its original position. After that, the protrusion of the cam 34 approaches the roller of the toothed rack 35 and moves it downwards (FIG. 1).

When the gear is moved, the rack 35 rotates the gear 36, which is rigidly seated on the same shaft with the gear 37. From the gear 37, the rotation is transmitted to the gear 38, and then through the pair of gear conical wheels 39 and 40 the rotation is transmitted to the conical fork 26, turning it to a certain angle. Then the protrusion of the cam 30 rolls off the roller of the lever 31 and returns to its initial position the punch 25, while the gear 38 moves along the gear 37, being constantly in engagement with it. After that, with the movable knife 7, the finished rod (Fig. 9) is chopped off and dropped into the hopper. Then the protrusion of the cam 34 comes off the roller of the toothed rack 35, returning the conical plug 26 to its original position. Then the cycle repeats. The cams 9, 28, 30, 32, 34 have such profiles that allow for the continuous rotation of the camshaft to perform the sequence of operations and the entire cycle.

The device allows molding loops of the same shape and size at the end of the bars, which was unattainable with the manual manufacture of such bars. Conveyor belts made using rods produced on the described device are different from bar tapes.

 The work is of high iosostoychivostkoTj io and quality.

Claims (1)

1. Auth. St. No. 214504, cl. In 21F 45/24, 1968. 77 Vuz.l Vui FIG. five