RU2349404C2 - Forming machine - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: invention concerns metal deformation process field. Particularly it concerns forming machines and can be used while manufacturing of polyhedral products of closed form. Forming machine contains bed, cross bar, installed with ability of rotation and displacement on columns, drive, implemented in the form of cylinder, rod of which is connected with two levers, each of which is connected by means of link with column, puncheon, matrix, carriage with rollers, located parallel to cross bar with ability of displacement. Puncheon is implemented with rectangular cross-section, is pivotally installed with ability of rotation relative to work surface of bed and outfitted from both sides by axis interlocked to additional drivers.

EFFECT: improvement of large-size products and accuracy of bending angle is provided .

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Description

The invention relates to the field of metal forming, in particular to press brakes, and can find application in the manufacture of multifaceted products of a closed shape.

Known bending mill containing a bed, a table, rigidly connected racks, hydraulic cylinders made in the form of two piston two-way hydraulic cylinders, a matrix, a punch installed with the possibility of reciprocating movement (see IPC B30B 1/32, description of the invention to the patent Russian Federation No. 2192964, published on November 20, 2002).

The disadvantages of the known device are:

- limited technological capabilities due to the inability to manufacture a closed loop;

- high energy costs due to the presence of two piston running hydraulic cylinders, requiring for each supply of energy necessary to complete the work.

Closest to the claimed technical solution is a press brake containing a bed, a matrix, a punch mounted on a traverse with the possibility of reciprocating movement through two columns in the guides, a drive made in the form of a cylinder, the rod of which is pivotally connected to two levers, each of which connected by an earring to a column, while the traverse is rotatable relative to one of the columns (see IPC B21D, B30B 1/32, description of the invention to the patent of the Russian Federation No. 2269391, publ. 02/10/2006).

The disadvantages of the known device are:

- low quality of finished products of large sizes, due to the formation of creases of metal on the sheet under the action of the weight of the workpiece with a large size of the processed sheet;

- low accuracy of bending angles in the manufacture of products of a multifaceted profile.

The technical result of the claimed invention is to improve the manufacturing quality of large products and the accuracy of the bending angles.

The essence of the technical solution lies in the fact that in a press brake containing a bed, a traverse mounted for rotation and movement on the columns, a drive made in the form of a cylinder, the rod of which is connected to two levers, each of which is connected by an earring to a column, a punch, the matrix, the carriage with rollers located parallel to the traverse with the ability to move, the punch is made with a rectangular cross-section, pivotally mounted to rotate relative to the working surface of the bed and is equipped with their sides axles cinematically connected with additional actuators.

The implementation of the punch with a rectangular cross-section, pivotally mounted with the possibility of rotation relative to the working surface of the bed, provides the installation of a sheet of large dimensions strictly horizontally, i.e. without its deformation and without the formation of kinks, which improves the further conditions of sheet deformation and ultimately the high quality of the finished product.

The supply of punches on both sides with axes kinematically connected with additional drives provides a controlled rotation of the punch relative to the working surface of the bed and bending to a certain adjusted angle of the part of the processed sheet during the formation of a multifaceted profile, thus obtaining high-quality (without cracks) finished products and ensuring the accuracy of angular bending that ultimately improves the quality of finished products.

The invention is shown in the drawings, in which Fig. 1 shows a general view of a press brake; figure 2 - the same when turning the beam; in Fig 3, 4 - bending diagrams.

The press brake contains a frame 1, a punch 2, a matrix 3, a crosshead 4, a carriage 5 with rollers 6 located and moving parallel to the crosshead 4, which rotates relative to the axis 7 of column 8 and can be moved by columns 8 and 9 in guides 10 and 11. The drive is made in the form of a cylinder 12, the rod 13 of which is pivotally connected to the levers 14, 15, each of which is connected by earrings 16 and 17, respectively, to the columns 8 and 9. Column 9 is equipped with a latch 18 for fastening the swing beam. The carriage 5 with the rollers 6 is mounted on a guide 19 located parallel to the traverse 4.

The punch 2 is made with a rectangular cross-section and, by means of a hinge 20 (Fig. 3), is mounted for rotation relative to the working surface 21 of the bed 1. On both sides, the punch is provided with axles 22 and 23, on which gears 24, 25 are installed, which are engaged with gears rails 26, 27. Additional drives are made in the form of cylinders 28, 29 (figure 2), the rods of which are connected to the gear racks 26, 27 and are located on both sides of the punch 2 on the bed 1. The matrix 3 is installed in the traverse 4 and its working surface 30 is made with an angle of inclination itelno working surface 21 of the base 1.

Press brake works as follows. The processed sheet 31 is laid on the working surface of the bed 1 and the rotary punch 2, the working fluid (liquid or air) is supplied to one of the cavities of the cylinder 12 (not shown in the drawing) and the received force is transmitted to the rod 13, acting on the levers 14, 15, which, turning around the axes, transmit the force through the earrings 16 and 17 to the columns 8, 9, the traverse 4 and the matrix 3, under the action of which the processed sheet 31 is pressed against the working surface 21 of the bed 1. After that, the working fluid (air) is fed into one from polo cylinder 28, 29 and by converting the translational motion of the gear racks 26, 27 into the rotational movement of the gears 24, 25, the punch 2 rotates, under the action of which the processed sheet 31 is bent by a predetermined angle.

After that, the processed sheet is moved to a distance determined by the dimensions of the side of the finished product, bent to the next angle and get the next face of the product. By repeating the above-described bending operations of the processed sheet 31 depending on the required shape and size, a finished product with a closed loop is obtained (see FIG. 3). In this case, for a strong connection of the initial and final forming surface of the processed sheet 31, the carriage 5 with the rollers 6 moves along the forming sheet 31, aligns the surface and ensures their abutment to each other. At the end of the movement, the carriage is returned to its original position, the yoke 4 is released from the latch 18 and the finished product is removed.

The use of the invention will improve the manufacturing quality of large-sized products by eliminating kinks and improving the accuracy of bending angles.

Claims (1)

A press brake containing a bed, a crosshead mounted for rotation and movement on the columns, a drive made in the form of a cylinder, the rod of which is connected to two levers, each of which is connected by an earring to a column, a punch, a matrix, a carriage with rollers located parallel to the crosshead with the possibility of movement, characterized in that the punch is made with a rectangular cross-section, pivotally mounted with the possibility of rotation relative to the working surface of the bed and provided with axes on both sides, kinematically -bound with additional actuators.

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