RU2317871C1 - Bending electromagnetic machine - Google Patents

Abstract

FIELD: plastic working of metals, namely manufacture of container blanks with given values of bending up angles of lateral walls.

SUBSTANCE: machine for producing container blanks with bending up angles of lateral walls in range 0 - 180° includes electromagnetic die used for fixing blank and pressure die selected from set of such dies depending upon product to be made. Collars are rotary ones; each collar includes П-shaped bracket mounted with possibility of rotation in axle and balance beam joined by its one end with said bracket. Bracket in axle is rigidly secured to body of electromagnetic die. Other end of balance beam forms sliding joint in groove along part of circumference of guide mounted in vertical wall of punch. The last is made with possibility of bending blank by angle 180° after performing bending operation by angle equal approximately to 135° without using pressure die.

EFFECT: improved reliability of blank fixation.

2 cl, 9 dwg, 3 ex

Description

The invention relates to machines for metal processing, in this case, in the processing of sheet steel (up to 0.8-1 mm). Using the machine allows you to produce profiles with a quality bend line in the directions that coincide or do not coincide with the parallel edges of the workpiece, produce all kinds of containers with any angle of bend of the side walls - from 0 to 180 degrees, cabinets for electrical equipment, fire and other equipment.

Known manual bending machine, see bull. No. 16, part 5 p. 1314, No. 45946.

The machine consists of a body on two racks, a clamping and a swivel beam, connection nodes, a fixed and a clamping beam, an installation table, stops, counterloads, a roller knife.

The disadvantage is a complicated device.

The well-known bending mechanism STD-19, see the book S.A. Kharlanov, V.A. Stepanov "Installation of ventilation systems and air coding", p. 80, 82 fig. 68, M., Higher school, 1975.

The mechanism consists of two racks, a clamping and bending beam of the table and a measuring device.

The disadvantage of the mechanism: a fixed angle of bending of the billet - 90 degrees, the mechanism is not intended for the device in the tsars end bends and receiving blanks of containers.

A device is also known for A.S. No. 1555012, aut. Plahotniuc et al., Bull. No. 13 dated 07.04.90, the machine contains a bed with a table, side racks, a lower clamp mechanism, a bending beam, a clamp beam with a central clamping tool, sliders with grooves, two magazine discs, a tool changer, a sheet orientation and positioning device. Disadvantages: the list of operations performed is small.

The prototype adopted the bending mechanism STD-19. It consists of two racks, a clamping and bending beam, a table and a measuring device.

Disadvantages: the list of operations is small, the mechanism is not intended for the manufacture of blanks for containers.

The technical problem of the incomplete list of the first paragraph is achieved by using a set of clamping matrices (see Figs. 1-8) for the main matrix with an electromagnetic coil, a bend angle meter, and punch loops for bending around an axis that does not coincide with the material in the device (see O-axis). The machine consists of a housing 1, a main electromagnetic matrix 2, a set of clamping dies 3 (it can be replenished, depending on the need to manufacture new products), a punch 4, loops 5, a bend lever 6 with a manual version, a bend angle meter (see Fig. 1-8). A feature of the machine is the ability of the punch to bend 180 degrees after bending ~ 135 degrees without applying a clamping matrix, using a loop that does not have an analogue according to the materials of Rospatent, periodicals and in technical publications.

An example of a specific implementation of the bends: a) a profile of g- or p-shape with parallel bending lines to the edges of the workpiece; b) p-P-shape profile with non-parallel bending lines; c) profiles of blanks along the lines at the corners of the cutouts for the manufacture of containers; bends in the manufacture of cabinets and their opening parts are performed in the same way as bends for the manufacture of containers.

a) The workpiece is mounted on the main electromagnetic matrix 2, the edges of the matrices 2 and 3 are combined with the necessary pressing matrix 3a from the set, and this line of edges must coincide with the intended bending line of the workpiece, by turning on the electromagnetic coil of matrix 2, the workpiece is firmly fixed in its magnetic field and then by bending the punch 4 to the desired angle, in this case manually, get the necessary g-profile; if necessary, make a p-profile, the bending operation on the workpiece is repeated to obtain another shelf.

b) On the main electromagnetic matrix 2, a workpiece is installed, the pressing matrix 3a, the edges of the matrices 2 and 3 are combined, this line of edges must coincide with the intended bending line of the workpiece, by turning on the electromagnetic coil of the matrix 2, the workpiece is firmly fixed in its magnetic field and then by bending the punch 4 to the desired angle, in this case manually, get a bend along a line not parallel to the edges of the workpiece; another bend, to obtain a p-P profile, the bending operation is repeated to obtain another shelf.

c) On the main electromagnetic matrix 2, a workpiece having cutouts is installed for the manufacture of containers, cabinets with the necessary clamping matrix 3b from the set, the intended bending line of the workpiece is combined with the edges of the matrices 2 and 3; further on the description in example a) produce the necessary bends.

In each example, to release the workpiece, the punch 4 is withdrawn, the coil of the matrix 3 is turned off, and the pressure matrix is removed (see Figs. 3a, 3c, 3c).

The device and operation of the punch loops during bending, measuring the angle of bending (see Fig. 5, 6, 7, 8).

The loop 5 consists of a U-shaped bracket 51, rotating in the axis 50-50, the rocker arm 52, which has a rigid connection with the bracket 51, and the other end is a sliding connection in the groove along the circumference in the guide 53. The counterpart of the bracket 51 with the axis 50- 50 is attached to the vertical wall of the electromagnetic matrix 2, and the guide 53 is mounted on the vertical wall of the punch 4.

Figure 5 shows the lower position of the punch (no bend), the graphic condition is accepted: the punch 4 is transparent.

Figure 7 shows the upper position of the punch (180 degree bend), after the bend of about 100-135 degrees has been made, the pressing matrix is removed, when the bending line of the workpiece coincides with the edge of the matrix 2, its electromagnetic coil is turned on, its electromagnetic field is firmly holds the workpiece, and with a punch 4, the bend is adjusted to 180 degrees.

Figure 9 shows the loop without communication with the machine.

The interaction of the bracket 52 and the guide 53 occurs in varying in space planes relative to the axis O-O.

Claims (2)

1. A bending machine for the manufacture of blanks for containers with a bend angle of the side walls from 0 to 180 °, comprising a housing, a die, a clamping die, a punch, a punch drive mechanism, a goniometer, hinges for attaching a punch to a fixed matrix, characterized in that as the matrix, an electromagnetic matrix is used, which serves to fix the workpiece, a pressure matrix is used as a pressure matrix, made with the possibility of removing and replacing from a set of pressure matrices depending on the manufactured products, loops made of rotary, each of which contains a U-shaped bracket that can rotate in the axis and a beam connected to it by one end, a bracket with an axis is rigidly mounted on the electromagnetic matrix body, and the beam is formed with its other end forming a sliding connection into the groove along the part of the guide circle mounted on the vertical wall of the punch, with the punch made with the possibility of bending at an angle of 180 ° after performing bending at an angle approximately equal to 135 ° without the pressure matrix. 2. The bending electromagnetic machine according to claim 1, characterized in that the axis of the loop of the U-shaped bracket is located at an angle of 30 ° to the bend line, and the sliding connection is made along part of the circle with an arc of 60 °, the center of which coincides with the intersection point of the P- axis shaped bracket with a bend line, and the counterpart in the sliding joint is connected with the beam in the hinge, the axis of which is perpendicular to the tangent to the arc of the sliding joint.

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