WO2012080537A1 - Method and device for separating securing elements - Google Patents

Method and device for separating securing elements Download PDF

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Publication number
WO2012080537A1
WO2012080537A1 PCT/ES2011/000368 ES2011000368W WO2012080537A1 WO 2012080537 A1 WO2012080537 A1 WO 2012080537A1 ES 2011000368 W ES2011000368 W ES 2011000368W WO 2012080537 A1 WO2012080537 A1 WO 2012080537A1
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WO
WIPO (PCT)
Prior art keywords
wedge
screw
separation
wedges
separating
Prior art date
Application number
PCT/ES2011/000368
Other languages
Spanish (es)
French (fr)
Inventor
Joseba Erdoiza Lejarreta
Original Assignee
Gamesa Innovation & Technology S.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gamesa Innovation & Technology S.L. filed Critical Gamesa Innovation & Technology S.L.
Publication of WO2012080537A1 publication Critical patent/WO2012080537A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D29/00—Hand-held metal-shearing or metal-cutting devices
    • B23D29/007—Hand-held metal-shearing or metal-cutting devices for splitting nuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
    • B26B17/003—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact manually operated tools specially adapted for separating nuts attached to each other, e.g. by rust

Definitions

  • the interest of the method of the invention is based on breaking or weakening the fixing element by over-tensioning it so as to facilitate its separation from the place of application where it is located.
  • the device used to achieve the object of the invention is mainly used in the repair and maintenance of wind turbines and more specifically in bolted joints.
  • US 4704793, CN 2281243 and CN 2470061 propose different solutions for opening nuts or fasteners by one or two application ends that press on the nut or fastener until they break.
  • the auxiliary systems used, both mechanical and hydraulic, are common systems for the movement of said application ends.
  • the present invention addresses the demand for devices capable of separating the fasteners avoiding the disadvantages presented by the aforementioned patents by expanding the offerings of the devices for breaking said fasteners.
  • Another object of the invention is the versatility of the actuator part. of the device that carries out the separation of fixing elements, since said device can work with different drives: hydraulic, pneumatic, mechanical, electromagnetic, etc. It is another object, that with the method used and with the device of the invention, any type of fixing element can be elongated regardless of its hardness and breakage deformation. For this, the wedges used are interchangeable with other wedges of different inclinations or wedges with the tip cut or set back. The less inclined wedges are used for bolts of higher hardness or quality. And vice versa.
  • Figure 1 shows a plan view of the tool object of the invention.
  • Figure 2 represents a section along the line MM 'showing the inside of the device applied on a fixing element.
  • Figure 3 is a graph whose axis of abscissa is the unit deformation and the axis of ordinates is the tension.
  • Figures 4 and 5 are different applications on different types of nut.
  • Figure 6 shows a wedge with the tip cut off.
  • the device of figures 1 and 2 is designed with auxiliary elements or wedges. These wedges can be used, although for simplicity the preferred embodiment is done with two. A wedge (1) attached to the frame (2) and another wedge (3) in contact with the selected actuator (4).
  • the wedge (3) is forced to move forward, pushed by an actuator (4), and its line of action is positioned flush with the lower plane of the head of the fixing element (5), between the washer (6) and the fixed part (in the case of said washer between the fixed part and the fixing element).
  • the other wedge (1) is integral to the frame (2) of the tool and receives the reaction of the force transmitted by the opposite wedge (3). This facilitates process control.
  • ports A and B are for the input and output of the oil that activates the actuator (4) transmitting its movement to the mobile wedge (3).
  • the result of the force of action is an upward movement of the head of the fixing element.
  • the displacement of the nut (5) with respect to the bolt or screw head (7) with respect to its rod By means of this displacement, a weakening in the screw (5) is achieved because the elasticity limits are exceeded and it enters the plastic zone represented in the tension-deformation curve of Figure 3.
  • an elongation is created permanent and the screw or nut head (5) is not in contact with the fixing surface again.
  • This is represented in the graph that relates the unit strain (abcissa axis) with the tension (ordinate axis).
  • the three examples shown correspond to three screws with different hardness.
  • the first one withstands a greater deformation for a screw quality of 8.8, in the second example the deformation is less and its hardness is cataloged in 10.9 and in the third case the deformation at break is very small and is reached with large levels of tension (hardness of 12.9).
  • the wedges (1 and 3) can be designed for each case in a way that maximizes its effect depending on the type of fixing element to be treated, having different inclinations and setbacks to optimize its performance in each case. With a lower angle of inclination there is a greater force with the same power applied to the actuator and with a greater angle (lower inclination) a greater upward displacement is obtained. If the angle of the wedge is related to the hardness of the different screws, a relationship is obtained as shown in the aforementioned figure 3.
  • the wedges (1 and 3) act on the head of the screw or nut (5), this element has a perimeter hole (8) at the base of the screw (figure 4) or have only the rounding characteristic of its surface finish (figure 5). So that the wedge tips can slide initially and start with the deformation of the screw (7).
  • the cut wedge (8) is used for second and subsequent applications. Once the rod has deformed (9) a certain distance, another wedge set back is used to continue the elongation process until breakage.
  • the shape and geometry of the device of the invention will be adapted according to the conditions of use, as well as the geometry and properties of the wedges will be designed according to the needs, without the scope of the present invention being altered.

Abstract

The invention relates to a method that can be used to break or weaken securing elements, by over-tensioning same one or more times until the nut (5) separates from the bolt or rod (7) or until the head of the bolt (5) separates from its rod (7). The device is applied in parallel to the joined surfaces and is formed by an actuator (4), preferably hydraulic, which moves one wedge (3) inside a frame (2) containing another stationary wedge (1). The wedges can be interchanged and the angles thereof determined according to the hardness of the bolt, and, for a second successive use, wedges (8) having no tips or set-back tips can be used or, in addition, other methods can be employed to finish breaking the nut or bolt in question.

Description

METODO Y DISPOSITIVO PARA LA SEPARACION DE ELEMENTOS DE FIJACIÓN  METHOD AND DEVICE FOR SEPARATION OF FIXING ELEMENTS
Objeto de la invención Object of the invention
El interés del método de la invención se basa en romper o debilitar el elemento de fijación sobre-tensionándolo de forma que se facilite su separación del lugar de aplicación donde se encuentra ubicado. El dispositivo utilizado para alcanzar el objeto de la invención se utiliza principalmente en la reparación y mantenimiento de los aerogeneradores y más específicamente en uniones atornilladas. The interest of the method of the invention is based on breaking or weakening the fixing element by over-tensioning it so as to facilitate its separation from the place of application where it is located. The device used to achieve the object of the invention is mainly used in the repair and maintenance of wind turbines and more specifically in bolted joints.
Antecedentes de la invención El desensamblaje de elementos de fijación de gran tamaño donde no existe la posibilidad de liberar el perno o tornillo aflojando de forma convencional la tuerca o correspondiente cabeza de tornillo, se centra en cortar, abrir o romper el elemento de fijación, y son técnicas bien conocidas en el estado del arte. BACKGROUND OF THE INVENTION The disassembly of large fixing elements where there is no possibility of releasing the bolt or screw by loosening the nut or corresponding screw head in a conventional manner, focuses on cutting, opening or breaking the fixing element, and They are techniques well known in the state of the art.
Las patentes US 4704793, CN 2281243 y CN 2470061 proponen diferentes soluciones para la apertura de tuercas o elementos de fijación mediante uno o dos extremos de aplicación que presionan sobre la tuerca o elemento de fijación hasta que lo rompen. Los sistemas auxiliares utilizados, tanto mecánicos e hidráulicos, son sistemas comunes para el movimiento de dichos extremos de aplicación. US 4704793, CN 2281243 and CN 2470061 propose different solutions for opening nuts or fasteners by one or two application ends that press on the nut or fastener until they break. The auxiliary systems used, both mechanical and hydraulic, are common systems for the movement of said application ends.
Otras patentes como DE 3809640, US 4031619 y GB 1079339 describen herramientas de corte. Estos dispositivos de corte cizallan el tornillo hasta conseguir cortarlo. Pero a pesar de utilizar cuñas afiladas no existe similitud entre estas patentes y el método objeto de la invención porque en la nueva invención no se corta si no que se sobre-tensiona axialmente el material utilizando las cuñas para alzar la cabeza del elemento de fijación buscando la plastificación o el límite de rotura del tornillo en vez de cizallándolo. La patente US 2010236079 tiene el diseño más cercano al dispositivo objeto de la invención. Utiliza dos cuñas afiladas si bien su uso es para cortar y no para alzar el elemento de fijación. Otra importante diferencia es que las cuñas de la patente americana no se mueven o se desplazan en sentido horizontal a la superficie de aplicación. Aunque también sea necesaria la aplicación de un mecanismo adicional para mover y unir ambas cuñas. Y finalmente el propósito de la patente US 2010236079 es totalmente diferente, esta herramienta es una herramienta de corte específica para cortar pezuñas de caballos. Other patents such as DE 3809640, US 4031619 and GB 1079339 describe cutting tools. These cutting devices shear the screw until it can be cut. But despite using sharp wedges there is no similarity between these patents and the method object of the invention because in the new invention it is not cut but the material is axially over-tensioned using the wedges to raise the head of the fixing element looking plasticization or screw breakage limit instead of shearing. US patent 2010236079 has the design closest to the device object of the invention. It uses two sharp wedges although its use is for cutting and not for lifting the fixing element. Another important difference is that the wedges of the American patent do not move or move horizontally to the application surface. Although it is also necessary to apply an additional mechanism to move and join both wedges. And finally the purpose of US patent 2010236079 is totally different, this tool is a specific cutting tool for cutting horse hooves.
Una característica común a las patentes anteriormente mencionadas es que los tornillos están directamente roscados sobre las piezas a unir y cortar la cabeza de este tipo de fijación implica alto riesgo de daño de la superficie que alberga los citados elementos de fijación. En algunos casos este corte de los elemento de unión puede revestir gran dificultad, por ejemplo durante el ensamblaje de la herramienta, o debido a la falta de espacio de actuación. Más aún, cuando se adoptan soluciones improvisadas se suelen generar ineficiencia y retrasos lo cual implica un importante aumento de los costes de mantenimiento y reparación. A common feature of the aforementioned patents is that the screws are directly threaded on the parts to be joined and cut off the head of this type of fixation implies a high risk of damage to the surface that houses said fasteners. In some cases this cutting of the connecting element can be very difficult, for example during the assembly of the tool, or due to the lack of space for action. Moreover, when improvised solutions are adopted, inefficiencies and delays are usually generated, which implies a significant increase in maintenance and repair costs.
La presente invención atiende la demanda de dispositivos capaces de separar los elementos de fijación evitando las desventajas presentadas por las patentes anteriormente mencionadas ampliando las ofertas de los dispositivos para la rotura de los citados elementos de fijación. The present invention addresses the demand for devices capable of separating the fasteners avoiding the disadvantages presented by the aforementioned patents by expanding the offerings of the devices for breaking said fasteners.
Descripción de la invención Description of the invention
Es un objetivo de la presente invención la aplicación del dispositivo para casos donde los elementos de unión están agarrotados y presentan dificultad para soltarse. Esto ocurre por ejemplo con los tornillos viejos, uniones oxidadas, desalineaciones, uniones gripadas, etc. Estas situaciones pueden generar retrasos de tiempo en el mantenimiento o montaje que el presente método propuesto puede ayudar a reducir. Es otro objeto de la invención la versatilidad de la parte actuadora del dispositivo que lleva a cabo la separación de elementos de fijación, ya que dicho dispositivo pueden funcionar con distintos accionamientos: hidráulico, neumático, mecánico, electromagnético, etc. Es otro objeto, que con el método utilizado y con el dispositivo de la invención, se pueda elongar cualquier tipo de elemento de fijación independientemente de su dureza y deformación a rotura. Para ello, las cuñas utilizadas son intercambiables con otras cuñas de distintas inclinaciones o cuñas con la punta cortada o retranqueada. Las cuñas de menor inclinación se usan para tornillos de más dureza o calidad. Y viceversa. It is an objective of the present invention the application of the device for cases where the connecting elements are seized and have difficulty releasing. This happens for example with old screws, rusty joints, misalignments, seized joints, etc. These situations can lead to delays in maintenance or assembly that the present proposed method can help reduce. Another object of the invention is the versatility of the actuator part. of the device that carries out the separation of fixing elements, since said device can work with different drives: hydraulic, pneumatic, mechanical, electromagnetic, etc. It is another object, that with the method used and with the device of the invention, any type of fixing element can be elongated regardless of its hardness and breakage deformation. For this, the wedges used are interchangeable with other wedges of different inclinations or wedges with the tip cut or set back. The less inclined wedges are used for bolts of higher hardness or quality. And vice versa.
De todo ello, se desprenden las principales ventajas que son el tiempo ahorrado en la separación, el menor coste comparando con las herramientas de corte y los beneficios de un dispositivo más ergonómico para utilizarse en situaciones difíciles. From all this, the main advantages that are the time saved in the separation, the lower cost compared with the cutting tools and the benefits of a more ergonomic device to be used in difficult situations.
Breve descripción de los dibujos La figura 1 muestra una vista en planta de la herramienta objeto de la invención. Brief description of the drawings Figure 1 shows a plan view of the tool object of the invention.
La figura 2 representa una sección según la línea MM' mostrando el interior del dispositivo aplicado sobre un elemento de fijación. Figure 2 represents a section along the line MM 'showing the inside of the device applied on a fixing element.
La figura 3 es una gráfica cuyo eje de abcisas es la deformación unitaria y el eje de ordenadas es la tensión. Figure 3 is a graph whose axis of abscissa is the unit deformation and the axis of ordinates is the tension.
Las figuras 4 y 5 son distintas aplicaciones sobre distintos tipos de tuerca. Figures 4 and 5 are different applications on different types of nut.
La figura 6 muestra una cuña con la punta cortada. Figure 6 shows a wedge with the tip cut off.
Realización preferente de la invención El dispositivo de las figuras 1 y 2 está diseñado con unos elementos auxiliares o cuñas. Estas cuñas pueden servarías, aunque por simplicidad la realización preferente se hace con dos. Una cuña (1) unida al bastidor (2) y otra cuña (3) en contacto con el actuador seleccionado (4). Preferred Embodiment of the Invention The device of figures 1 and 2 is designed with auxiliary elements or wedges. These wedges can be used, although for simplicity the preferred embodiment is done with two. A wedge (1) attached to the frame (2) and another wedge (3) in contact with the selected actuator (4).
La cuña (3) está forzada a desplazarse hacia delante, empujada por un actuador (4), y su línea de actuación se posiciona a ras del plano inferior de la cabeza del elemento de fijación (5), entre la arandela (6) y la pieza fijada (en el caso de existir dicha arandela entre la pieza fijada y el elemento de fijación). Además, se puede usar una base con el espesor de la arandela y que circunde la misma para dar una base a la herramienta y así mejorar la ergonomía. The wedge (3) is forced to move forward, pushed by an actuator (4), and its line of action is positioned flush with the lower plane of the head of the fixing element (5), between the washer (6) and the fixed part (in the case of said washer between the fixed part and the fixing element). In addition, you can use a base with the thickness of the washer and that surrounds it to give a base to the tool and thus improve ergonomics.
La otra cuña (1 ) está solidaria al marco (2) de la herramienta y recibe la reacción de la fuerza transmitida por la cuña opuesta (3). Esto facilita el control del proceso. The other wedge (1) is integral to the frame (2) of the tool and receives the reaction of the force transmitted by the opposite wedge (3). This facilitates process control.
En caso de elegir un actuador hidráulico, los puertos Ay B son para la entrada y salida del aceite que activa el actuador (4) transmitiendo su movimiento a la cuña móvil (3). In case of choosing a hydraulic actuator, ports A and B are for the input and output of the oil that activates the actuator (4) transmitting its movement to the mobile wedge (3).
El resultado de la fuerza de acción es un desplazamiento hacia arriba de la cabeza del elemento de fijación. En la realización actual el desplazamiento de la tuerca (5) respecto al perno o de la cabeza del tornillo (7) respecto a su vástago. Por medio de este desplazamiento se logra un debilitamiento en el tornillo (5) porque se sobrepasa los límites de elasticidad y entra en la zona plástica representada en la curva tensión- deformación de la figura 3. Cuando se alcanza la deformación plástica se crea una elongación permanente y la cabeza del tornillo o tuerca (5) no vuelve a estar en contacto con la superficie de fijación. Esto viene representado en la gráfica que relaciona la deformación unitaria (eje de abcisas) con la tensión (eje de ordenadas). Los tres ejemplos que se muestran corresponden a tres tornillos con diferente dureza. El primero soporta una deformación mayor para una calidad de tornillo de 8.8, en el segundo ejemplo la deformación es menor y su dureza está catalogada en 10.9 y en el tercer caso la deformación a rotura es muy pequeña y se alcanza con grandes cotas de tensión (dureza de 12.9). The result of the force of action is an upward movement of the head of the fixing element. In the current embodiment, the displacement of the nut (5) with respect to the bolt or screw head (7) with respect to its rod. By means of this displacement, a weakening in the screw (5) is achieved because the elasticity limits are exceeded and it enters the plastic zone represented in the tension-deformation curve of Figure 3. When the plastic deformation is reached an elongation is created permanent and the screw or nut head (5) is not in contact with the fixing surface again. This is represented in the graph that relates the unit strain (abcissa axis) with the tension (ordinate axis). The three examples shown correspond to three screws with different hardness. The first one withstands a greater deformation for a screw quality of 8.8, in the second example the deformation is less and its hardness is cataloged in 10.9 and in the third case the deformation at break is very small and is reached with large levels of tension (hardness of 12.9).
Las cuñas (1 y 3) pueden diseñarse para cada caso de forma que maximice su efecto dependiendo del tipo de elemento de fijación que se vaya a tratar, disponiendo de diferentes inclinaciones y retranqueos para optimizar su actuación en cada caso. Con un menor ángulo de inclinación se tiene una mayor fuerza con la misma potencia aplicada al actuador y con un mayor ángulo (menor inclinación) se obtiene un mayor desplazamiento hacia arriba. Si se relaciona el ángulo de la cuña respecto a la dureza de los distintos tornillos se obtiene una relación como la representada en la citada figura 3. The wedges (1 and 3) can be designed for each case in a way that maximizes its effect depending on the type of fixing element to be treated, having different inclinations and setbacks to optimize its performance in each case. With a lower angle of inclination there is a greater force with the same power applied to the actuator and with a greater angle (lower inclination) a greater upward displacement is obtained. If the angle of the wedge is related to the hardness of the different screws, a relationship is obtained as shown in the aforementioned figure 3.
Tal y como se muestra en las figuras 4 y 5, las cuñas (1 y 3) actúan sobre la cabeza del tornillo o tuerca (5), tenga este elemento un hueco perimetral (8) en la base del tornillo (figura 4) o tenga solamente el redondeo propio de su acabado superficial (figura 5). De forma que las puntas de la cuña pueden deslizar inicialmente y comenzar con la deformación del tornillo (7). As shown in figures 4 and 5, the wedges (1 and 3) act on the head of the screw or nut (5), this element has a perimeter hole (8) at the base of the screw (figure 4) or have only the rounding characteristic of its surface finish (figure 5). So that the wedge tips can slide initially and start with the deformation of the screw (7).
Dependiendo del elemento de fijación a tratar, en la mayoría de los casos, es posible separar por una parte la cabeza del tornillo o tuerca (5) y por la otra su vástago o tornillo (7). Si no fuera posible separarlo completamente, el elemento de unión sufrirá un debilitamiento debido a la deformación plástica conseguida. Esta elongación inicial será utilizada para (si no se ha roto la unión) separar la cabeza del tornillo (tuerca) en una segunda acción con llaves de par hidráulico, con otra cuña de mayor inclinación, con una radial, etc. Combinar las cuñas y una llave de par (p.ej. hidráulico) mejora la rotura al dar dos direcciones de tensiones. Depending on the fixing element to be treated, in most cases, it is possible to separate the head of the screw or nut (5) on the one hand and on the other its stem or screw (7). If it is not possible to separate it completely, the connecting element will suffer a weakening due to the plastic deformation achieved. This initial elongation will be used to (if the joint has not been broken) separate the head of the screw (nut) in a second action with hydraulic torque wrenches, with another wedge of greater inclination, with a radial, etc. Combining the wedges and a torque wrench (eg hydraulic) improves breakage by giving two directions of tension.
Pueden aplicarse diferentes métodos en función del estado de deformación del tornillo: Different methods can be applied depending on the deformation state of the screw:
- usando el mismo método pero con diferentes geometrías de cuñas, hasta alcanzar la elongación que consiga el límite de rotura- using the same method but with different wedge geometries, until reaching the elongation that achieves the breaking limit
- rotura por giro, separando la cabeza del tornillo mediante la torsión del mismo - breakage by turning, separating the head of the screw by twisting it
- con la aplicación de otros actuadores  - with the application of other actuators
- con la combinación de otras herramientas de corte  - with the combination of other cutting tools
Estas formas de actuación secundarias pueden aplicarse a la misma herramienta de la invención o combinarse con otras herramientas ya conocidas que ayuden a debilitar y separar el elemento de fijación. These secondary forms of action can be applied to the same tool of the invention or combined with other known tools that help to weaken and separate the fixing element.
Tal y como se muestra en la figura 6 la cuña cortada (8) se utiliza para segundas y sucesivas aplicaciones. Una vez que el vástago se ha deformado (9) una distancia determinada se utiliza otra cuña retranqueada para continuar el proceso de elongación hasta rotura. As shown in Figure 6, the cut wedge (8) is used for second and subsequent applications. Once the rod has deformed (9) a certain distance, another wedge set back is used to continue the elongation process until breakage.
La forma y geometría del dispositivo de la invención se adaptará según las condiciones de utilización, así como la geometría y propiedades de las cuñas se diseñarán según las necesidades, sin que el alcance de presente invención se vea alterado. The shape and geometry of the device of the invention will be adapted according to the conditions of use, as well as the geometry and properties of the wedges will be designed according to the needs, without the scope of the present invention being altered.

Claims

Reivindicaciones Claims
1. - Método para la separación de elementos de fijación que disponen de un vástago atornillado a las piezas que quieren fijarse y una cabeza de tornillo o tuerca sobresaliendo de las piezas a unir, caracterizado porque la rotura del elemento de fijación se lleva a cabo mediante un desplazamiento hacia arriba de la cabeza del elemento de fijación (5) producida por la actuación de una pieza en forma de cuña (3) desplazada por una fuerza ejercida por un actuador (4), que crea una elongación progresiva del vástago del tornillo (7) respecto a la cabeza del mismo (5) hasta plastificar o alcanzar el límite de rotura separando ambas partes. 1. - Method for the separation of fasteners that have a rod screwed to the parts to be fixed and a screw or nut head protruding from the pieces to be joined, characterized in that the tearing of the fastener is carried out by an upward movement of the head of the fixing element (5) produced by the actuation of a wedge-shaped part (3) displaced by a force exerted by an actuator (4), which creates a progressive elongation of the screw shank ( 7) with respect to the head of the same (5) until plasticizing or reaching the breaking limit by separating both parts.
2. - Método para la separación de elementos de fijación según la reivindicación primera, caracterizado porque si no se logra la separación en una primera actuación, se intercambian las cuñas con diferente ángulo de inclinación o retranqueo y se ejercen consecutivas acciones hasta su rotura. 2. - Method for the separation of fasteners according to claim one, characterized in that if the separation is not achieved in a first action, the wedges with different angle of inclination or setback are exchanged and consecutive actions are carried out until they are broken.
3. - Método para la separación de elementos de fijación según la reivindicación primera, caracterizado porque si no se logra la separación en una primera actuación, se combina la acción de las cuñas con la aplicación de otros actuadores para terminar de romper o cortar el tornillo y la tuerca. 3. - Method for the separation of fasteners according to claim one, characterized in that if the separation is not achieved in a first action, the wedge action is combined with the application of other actuators to finish breaking or cutting the screw and the nut
4.- Dispositivo para la separación de elementos de fijación que disponen de un vástago atornillado a las piezas que quieren fijarse y una cabeza de tornillo o tuerca sobresaliendo de las piezas a unir, caracterizado por disponer de dos piezas en forma de cuña que se ubican enfrentadas entre sí en el interior del marco de una herramienta, de las cuales una cuña (1) es fija y la otra cuña (3) es móvil y accionada por un actuador formado por un actuador (4), siendo su desplazamiento paralelo a la superficie de actuación del útil. 4.- Device for the separation of fasteners that have a rod screwed to the pieces they want to fix and a screw or nut head protruding from the pieces to be joined, characterized by having two wedge-shaped pieces that are located facing each other inside the frame of a tool, of which one wedge (1) is fixed and the other wedge (3) is mobile and driven by an actuator formed by an actuator (4), its displacement being parallel to the surface of the tool.
5.- Dispositivo para la separación de elementos de fijación según reivindicación 4, caracterizada porque ambas piezas en forma de cuña son intercambiables y además tienen un sistema de sujeción. 5. Device for separating fasteners according to claim 4, characterized in that both wedge-shaped parts are interchangeable and also have a clamping system.
6. - Dispositivo para la separación de elementos de fijación según reivindicación 4, caracterizada porque el ángulo de las cuñas tienen una relación directa con la dureza de los distintos tornillos, seleccionándose las distintas cuñas utilizadas en función de la dureza del tornillo. 6. - Device for separating fasteners according to claim 4, characterized in that the angle of the wedges has a direct relationship with the hardness of the different screws, the different wedges used being selected depending on the hardness of the screw.
7. - Dispositivo para la separación de elementos de fijación según reivindicación 4, caracterizado porque la cuña (8) utilizada en las sucesivas actuaciones tiene la punta cortada o retranqueada. 7. - Device for separating fasteners according to claim 4, characterized in that the wedge (8) used in successive performances has the tip cut or set back.
8. - Dispositivo para la separación de elementos de fijación según reivindicación 4, caracterizado porque el actuador (4) es preferentemente hidráulico. 8. - Device for separating fasteners according to claim 4, characterized in that the actuator (4) is preferably hydraulic.
PCT/ES2011/000368 2010-12-16 2011-12-16 Method and device for separating securing elements WO2012080537A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201001582 2010-12-16
ES201001582A ES2384926B1 (en) 2010-12-16 2010-12-16 METHOD AND DEVICE FOR SEPARATION OF FIXING ELEMENTS.

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WO2012080537A1 true WO2012080537A1 (en) 2012-06-21

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1694561A (en) * 1927-05-31 1928-12-11 Oliver B Pickett Bolt and rod cutter
US1736041A (en) * 1927-11-14 1929-11-19 Charles A Huff Clipping device
US4031619A (en) * 1976-01-19 1977-06-28 Gregory Jack T Manual, hydraulically operated tool
DE3809640A1 (en) * 1988-03-22 1989-10-05 Walter Schilling Hydromechanical bolt-cutting tool
WO2010032277A1 (en) * 2008-09-17 2010-03-25 東芝三菱電機産業システム株式会社 Dismantling device and dismantling method of rotating electric machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1694561A (en) * 1927-05-31 1928-12-11 Oliver B Pickett Bolt and rod cutter
US1736041A (en) * 1927-11-14 1929-11-19 Charles A Huff Clipping device
US4031619A (en) * 1976-01-19 1977-06-28 Gregory Jack T Manual, hydraulically operated tool
DE3809640A1 (en) * 1988-03-22 1989-10-05 Walter Schilling Hydromechanical bolt-cutting tool
WO2010032277A1 (en) * 2008-09-17 2010-03-25 東芝三菱電機産業システム株式会社 Dismantling device and dismantling method of rotating electric machine

Also Published As

Publication number Publication date
ES2384926A1 (en) 2012-07-16
ES2384926B1 (en) 2013-06-05

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