FI85112C - Bending device for thin sheets and method for bending thin sheets takes - Google Patents

Description

1 85112

Sheet metal bending apparatus and method for bending sheet metal. - Renewal arrangements for tunnels and for the construction of tunnels.

The invention relates to a sheet metal bending device according to the preamble of claim 1. The invention further relates to a method for bending sheet metal according to the preamble of claim 3.

The object of the invention is to provide a bending device which makes it possible to bend sheets or webs of sheet metal of different widths. To achieve this object, the bending device according to the invention is characterized by the things set forth in the characterizing part of claim 1. It is a further object of the invention to provide a method for bending sheet metal sheets or webs of different widths, for which purpose the method according to the invention is characterized by the things set forth in the characterizing part of claim 3.

The invention will now be described with reference to the accompanying drawings, in which:

Fig. 1 shows an end view of a bending device according to the invention, Fig. 2 schematically shows the bending members of a bending unit, and Figs. 3a and 3b schematically show measures for bending a sheet metal body.

According to Figures 1 and 3, the device comprises a body 11 and at least two opposite bending units 1, 2 connected to the body 11. The bending units are provided with bending members with their actuators and upper and lower pushers 2 85112 1a 4 and 5, respectively. The bending means comprise e.g. a bending cylinder (not shown) and bending vanes 3a and 3b and means for adjusting the vertical and horizontal direction, e.g. the stop 8 and the shaft 9 respectively. In the illustrated embodiment, the upper pushers 4 are arranged to be moved e.g. by pusher cylinders 5 arranged to remain in place. In the bending device according to Fig. 1, the bending unit 2 is arranged to move by guides 12 substantially perpendicular to the bending unit 1. The positioning of the movable bending unit 2 is preferably arranged numerically. In order to position the bendable plate (indicated by reference numeral 10 in Fig. 3), in the present embodiment, the bending vanes 3a are arranged to act as a positioning member against which the bendable plate is initially placed to precisely determine its position. The position of the bending vane 3a can be determined, for example, by means of a stop 8 and a shaft 9.

The method according to the invention is carried out with the device according to the present embodiment, e.g. by first inserting the plate into the gap between the bending units 1, 2 and positioning it between the upper and lower pushers 4, 5 of the fixed bending unit 1 against the bending wing 3a. The movable bending unit 2 is then placed against the other edge of the plate to be bent by means of the bending blade 3a. After the position of the plate has thus been determined, the positioning of the plate at the desired bending point is carried out using the upper and lower pushers 4, 5 as gripping members. This positioning can be performed e.g. by initially pushing the pushers 4, 5 of the fixed bending unit 1 with the plate to be bent, the pushers 4, 5 of the movable bending unit 2 being open, whereby the movable bending unit 2 can be moved to the desired bending point and then fixed and bent in the direction of. The presses of the fixed bending unit can then be opened and the plate can be moved by means of the movable bending unit 2 to the desired bending position in the fixed bending unit 1, after which the fixed bending unit

II

The presses of the 3 85112 bending unit are brought into contact with the plate and the other edge is bent in the desired direction. In this way, it is possible to continue alternately until both edges of the plate are bent into the desired shape, e.g. into a U-, C- or hat-profile. Finally, the finished piece is returned to the center position to remove it from the device.

In the exemplary embodiment according to Figs. 3a and 3b, the bent plate 10 is initially positioned by means of the bending vanes 3a to the desired bending point (Fig. 3a), after which each edge of the plate 10 is bent downwards by the bending vanes 3a (Fig. 3b, step I). Thereafter, the upper pusher 4 of the fixed bending unit 1 is raised and the plate 10 is moved by means of the movable bending unit 2 towards the fixed bending unit to a new bending point (Fig. 3b, step II). The upper pusher 4 of the fixed unit is then lowered and the edge of the fixed bending unit 1 is bent upwards from the new bending point, the lower bending blade 3b, then the pusher 4 of the movable bending unit 2 is lifted up and said bending unit 2 is . Thereafter, the upper pusher 4 of the movable unit 2 is lowered and the upward bending of the edge of the movable unit 2 is performed with the lower bending blade 3b (Fig. 3b, step IV). Finally, the upper pushers 4 of both units 1, 2 are lifted up and the finished part is removed from the device.

The above examples are intended to illustrate only some of the preferred embodiments of the invention and are not intended to limit the scope of the claims set forth below.

Claims (3)

4,85112 A sheet metal bending device comprising a body (11), at least two opposing bending units (1, 2) connected to the body, provided with bending members with actuators and upper and lower pushers (4, 5) and plate positioning members having a positioning position determined with respect to the respective bending unit (1, 2) by means of positioning means (8, 9) of the positioning means, one or both of the opposite bending units (1, 2) being arranged to move substantially perpendicular to the other bending unit (1) opposite the plate (10) positioning at the desired bending point, and the upper and lower pushers (4, 5) form gripping means for moving the plate (10) during positioning and / or determining the bending point of the plate, characterized in that the bending blades (3a, 3b) of each unit (1, 2) or fit the blade moving members after initial positioning of the plate (10), in which initial positioning and initial bending one edge of the plate (10) abuts the positioning means of the first unit (1) and the opposite edge of the plate (10) against the positioning means of the second unit (2), the position of the plate (10) with respect to each unit (1, 2) is precisely determined, the bending of the plate (10) is arranged to be performed alternately in each bending unit (1, 2) so that the positioning of the bending point of the plate is performed by removing the first bending unit (1) detaching the gripping members (4, 5) from the engagement with the plate (10) and moving the plate to the desired bending point in the first bending unit (1) with the second bending unit (2) and re-engaging the gripping members with the plate (10) in the first bending unit (1) the gripping members (4, 5) of the second bending unit (2) are detached i engaging the plate (10) and moving the plate (10) relative to this second bending unit (2) to the desired bending point 5 85112 in this second bending unit (2) and re-engaging its gripping members with the plate (10) and performing bending therein, bending in the desired direction in each unit (1, 2) takes place by using a bending blade (3a) above and / or below the bending members or (3b), respectively. Device according to Claim 1, characterized in that the bending blades (3a, 3b) of the bending unit (1, 2) for upward and downward bending are connected by at least one connecting rod (13), the movement of the bending blades (3a, 3b) being possible by a single actuator. . A method for bending sheet metal, e.g. into U-, C- and hat-shaped profiles, with a device comprising a body (11), at least two opposing bending units (1, 2) connected to the body, provided with bending means with actuators and an upper - and a lower pusher (4, 5), in which device at least one bending unit (2) is arranged to move substantially perpendicular to the opposite bending unit (1) to bring the plate (10) against the positioning means of one unit and then aligning the plate (10) the opposite edge and the positioning means of the second unit in response, characterized in that the method comprises the steps of: (A) positioning the plate by means of bending blades (3a, 3b) acting as positioning means or separate positioning means connected to the bending means; with respect to each unit (1, 2), the sides of the plate (6) upper and lower pushers (4, 5) are used as gripping members for direct transfer; and 6 85112 (C) bending the plate (10) in the desired direction using a bending blade (3a and 3b, respectively) above and / or below the bending members. 7 85112 P ^ tentkrav