ES2925114A1 - Exact diameter bending machine (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Profile bending machine comprising a series of radial guides (2) centered on a point, with a bending machine (4) mounted on a guide (2) and having skids (3) to support the profile on the rest of the guides (2). It also has a concentric adjustable length guide arm (5) with the guides (2). that are the same distance from the center point. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Exact diameter bending machine

TECHNICAL SECTOR

The present application refers to a profile bending machine, which allows to generate curves, circles and other curved objects with a particularly exact and precise radius or diameter.

STATE OF THE ART

The existence of bending machines for bars and other profiles is known in the state of the art. A well-known example is made up of three pulleys or sheaves. When passing between the sheaves, which are closer than the thickness of the bar or profile, it has to bend. Depending on the distance, the diameter or radius of curvature is greater or less.

However, the elasticity of the profile makes the precision of this radius or diameter less than desirable. The profile more or less recovers its position, so that the result is approximate but not exact. Even more so when the thickness of the bar has tolerances.

The applicant does not know of any equipment that makes it possible to solve all these problems in such a simple way as the invention.

BRIEF EXPLANATION OF THE INVENTION

The invention consists of a bending machine with exact diameters according to the independent claims and whose variants solve the problems of the state of the art.

The profile bending machine starts from a bending machine with two or three sheaves. It comprises a series of radial guides centered on a point. The bending machine is mounted on one of the guides and it has profile support skids on the rest of the guides. In addition, it incorporates a guide arm of adjustable length concentric with the guides, and of free rotation on the central point of the guides, with an adjustable guide.

In the preferred embodiment, the sliders and the bender are connected to each other by a mechanism for coordinating their position on the respective guide.

Other variants are seen in the rest of the report.

DESCRIPTION OF THE FIGURES

For a better understanding of the invention, the following figures are included.

Figure 1: Diagram of an embodiment, from a top view.

Figure 2: Example of realization of the guide arm.

MODES OF EMBODIMENT OF THE INVENTION

Next, an embodiment of the invention is briefly described, as an illustrative and non-limiting example of the latter.

The bending machine shown in figure 1 comprises a table (1), generally round, with several radial guides (2) starting from the same point. In each guide (2), except for a first guide (2), there is a sliding skate (3), mobile by means of a drive, which can be mechanical, hydraulic, manual, pneumatic or of any other type... The position of the skates (3) are controlled so that the imaginary line that joins them is the exact curve to be defined with the profile to be curved. The position of each skate (3) can be measured digitally or analogically.

The runners (3) have a simple positioning function for the profile to be curved by means of stops (31) that define the position of the profile on the runners (3). These pads (3) mark the inner diameter of the hoop or ring. In the guide (2), which does not have a pad (3), there is a bending machine (4) with two or three rollers (41,42) that collects the profile and gives it a curvature close to that required, while orienting it towards the other skates (3). This type of bending machine is made up of two or three pulleys or sheaves between which the profile passes. At least one roller (41, 42) is motorized and makes the profile pass between the rollers, for which it needs to take a certain deformation.

In the case of the example shown in Figure 1, the inner sheave (41) is arranged in the same position, on the guide (2), as the stops (31). The outer sheaves (42) are the motorized ones,

The movement of the skates (3) is carried out in a coordinated manner by a mechanism, so that the position of the skates (3) and the bender (4) on the corresponding guide (2) is identical. For example, the mechanism can be similar to that of an umbrella, with a central element movable along a bar perpendicular to the guides (2) and connected by braces to all the skates (3) (not shown). For example, with an endless screw that carries the mobile central element. Other mechanisms are possible.

The precision in the diameter of curvature is achieved thanks to a guide arm (5) arranged in the center of the guides (2) and with an extensible length. This guide arm (5) is calibrated to ensure that its length is exact and can thus be defined to the target diameter. The objective of this guide arm (5) is to guide the profile so that it adapts without deviation to the runners (3) of the table. As can be seen in figure 3, the guide arm (5) has a first end (51) that is fixed with free rotation on the center of the guides (2). Thus, the guide arm (5) can rotate freely and without resistance. At the second end (52) a capsule or guide (53) is defined for the passage of the profile. It can be seen in the figure that the guide arm (5) is adjustable in length so that the guide (53) is in the correct position. Likewise, it can be of fixed length and the guide (53) can move on the guide arm (5). The guide arm (5) moves simply by the friction generated by the profile as it passes through the guide (53) and carries the profile to the skids (3). Thus, it is ensured that the profile is in the exact position, passing through all the runners (3) until the circle is approximately closed.

At that point, the machine operator temporarily joins both ends together, and the bent profile can be sent to the shear and welding station. The union can be by an adhesive tape, to prevent any type of movement of the ends.

In addition, the machine includes a power supply, and other elements such as an emergency stop button, start or stop indicators...

The machine has a control panel that allows its parameters to be adjusted, such as the separation between sheaves and the position of the skates (3). and with electrical safety elements (d isbreakers.) and electronics.

Claims (1)

1- Exact diameter bending machine, with a bending machine (4) with two or three sheaves, characterized in that it comprises a series of radial guides (2) centered on a point, the bending machine (4) being mounted on a guide (2) and having skates (3) to support the profile in the rest of the guides (2), and a guide arm (5) of adjustable length concentric with the guides (2) and free to rotate on the central point of the guides (2). ), with an adjustable guide (53). 2- Exact diameter bending machine, according to claim 1, characterized in that the skates (3) and the bending machine (4) are connected by a position coordination mechanism on the respective guide (2). 3- Exact diameter bending machine, according to claim 1, characterized in that the bending machine (4) has three sheaves. 4- Exact diameter bending machine, according to claim 1, characterized in that the guides (2) are supported on a round table (1).