SU1017407A1 - Abutment to section bending machine with rotary cross-piece - Google Patents

Abstract

1. RESISTING TO A PREVENTION MACHINE WITH A SWIVEL TRAVER SAY, containing a stop plate mounted on a plate and a clamping device made in the form of several spring loaded double shoulders mounted on a shaft, equipped with a drive, characterized in that, in order to increase productivity by eliminating commissioning work the transition from bending flat sheets to bending workpieces with bent edges, arms of levers located in the area of interaction with the workpiece are made with sections bent downwards, and in the slab are made p basics for placing these sites. 2. An emphasis according to Claim 1, characterized in that the drive of the levers is made in the form of a power cylinder and a lever connected to it fixedly mounted on the shaft of the clamping device.

Description

The invention relates to the processing of metals by pressure, in particular to equipment for sheet bending.

Closest to the proposed technical essence and the achieved result is a back stop for a roll forming machine with a rotary bending head plate, which clamp the front edge of the sheet using levers that are driven, for example, by electromagnets. The levers are located in the zone of support of the sheet in the bar and protrude beyond its supporting surface 1.

This design of the stop allows only a flat sheet to be installed with the clamping arms open, as is the case with bending of the simplest parts.

In most cases, for example, when bending parts such as channels, boxes and the like, after bending the first edge, the part bends and abut against the support bar with a bent wall so as to be able to bend the remaining walls.

The design of the known stop due to the protruding levers does not allow the part with the bent wall to rest against the bar.

Therefore, in the manufacture of such parts, it is necessary to carry out readjustment: remove all the levers, leaving only the stop bar, or make and insert into the clamp an additional piece with a side that you need to remove when working with a flat sheet, both are very inconvenient during operation.

In addition, the clamping is carried out by means of a power drive (electromagnets, and the unclamping of the levers - by means of springs.

As a result, during the whole time that the sheet is bending when the sheet is to be clamped, the drive of the clamping levers remains turned on, which leads to constant energy consumption and a large wear of the drive mechanism.

The purpose of the invention is to increase productivity by eliminating adjustment work during the transition from bending flat sheets to bending blanks with bent edges.

The set goal is achieved by the fact that in the support to the roll forming machine with a rotary head plate containing a stop plate mounted on the plate and a clamping device made in the form of several spring loaded two shoulders levers fitted on the shaft, equipped with a drive, the arms of the levers located in the zone of interaction with billet, made with bent down areas, and in the plate

grooves are made to accommodate these sections. The drive of the levers is made in the form of a power cylinder and a lever connected to it, fixedly mounted on the shaft behind the pressing device.

FIG. 1 shows the position of the back stop when clamping a flat sheet; in fig. 2 the same, when bending parts with already bent edges; in fig. 3 is a plan view.

The back rest consists of a carriage 1 moving along a spindle 2 associated with a drive (not shown).

On the carriage 1, a welded frame 3 is fastened, in the front part of which there is a plate 4, which is the base for the retaining plates 5.

The frame 3 has a shaft b, on which the clamping levers 7 and the drive lever 8 are still sitting. The clamping levers are under the constant action of the springs 9, which press the levers to the plate 4, and in this position the front ends of the levers 7 are installed in specially made cutouts in the plate, thus freeing the working surface of the thrust plates.

The drive lever 8 is driven by a cylinder 10 mounted on frame 3.

Back gauge works in the following sequence.

Before loading the sheet, the operator uses the pedal or the control button to turn on the valve that controls the cylinder. The cylinder acts on the drive lever 8 and rotates the shaft 6 clamping levers, compressing the spring.

At the same time, the levers are raised, providing the possibility of installing the pnst against the stop in the strips 5.

Then the cylinder is turned on and the springs, acting on the levers, press the sheet.

When bending parts that have a bent edge, the clamping levers are recessed into the cutouts of the plate and do not prevent the installation of the part up to the stop in the bar with the bent edge.

The present invention allows to increase the productivity of the machine by eliminating the adjustment work during the transition from bending flat sheets to bending of workpieces having already bent edges.

In addition, the use of the invention saves energy, as the drive of the clamping levers is switched on for a short time only to open them, and the sheet is clamped during processing by springs.

+

4 / +

x7

l

Claims (2)

1. The thrust to a profile bending machine with a swing beam, comprising a stop plate mounted on a plate and a clamping device made in the form of several spring-loaded double-arm levers equipped with a drive, characterized in that, in order to increase productivity by eliminating adjustment work during the transition from bending flat sheets to bending workpieces with bent edges, lever arms located in the zone of interaction with the workpiece are made with sections bent down, and grooves are made in the plate for I am posting these sites. 2. An emphasis according to claim 1, characterized in that the lever drive is made in the form of a power cylinder and a lever associated with it, fixedly mounted on the shaft of the clamping device. Figure 1