TH34337A - Water-based formation of a tubular metal stirrup with an oval cross-section. - Google Patents

Abstract

DC60 (13/10/41) This invention involves a method and equipment for forming a long tube-shaped metal stirrup from Tubular metal stirrup The method consists of 1) the general insertion of a tubular metal stirrup with an oval cross-section. Go into the template cavity and orient the tubular metal stirrups in such a way that the relative dimensions are larger. The general elliptical cross-section extends generally in the direction of the relatively larger cross-section of the cavity. A template in such a way that the relatively smaller cross-sectional dimensions of the generally oval cross-section protrude generally in the direction of The path of the relatively smaller cross-sectional dimensions of the template cavity. 2) the fastening and sealing of the ends. The opposite sides of the tubular metal stirrup and 3) the fluid injection under pressure into the metal stirrup. The tubular shaped metal stirrup is expanded to conform to the specified cavity surface and thus transform. The tubular metal stirrup is a long tube-shaped metal stirrup. The invention involved a method and equipment for forming a long tube-shaped metal stirrup from Tubular metal stirrup The method consists of 1). Inserting a tubular metal stirrup with a typical oval cross-section. Go into the template cavity and orient the tubular metal stirrups in such a way that the relative dimensions are larger. The general elliptical cross-section extends generally in the direction of the relatively larger cross-section of the cavity. A template in such a way that the relatively smaller cross-sectional dimensions of the generally oval cross-section protrude generally in the direction of Way of the relatively smaller cross-sectional dimensions of the said template cavity 2). Hook, fasten and seal the ends. Opposite sides of the tubular metal stirrup and 3). Fluid injection under pressure into the metal stirrup. The tubular shaped metal stirrup is expanded to conform to the specified cavity surface and thus transform. The tubular metal stirrup is a long tube-shaped metal stirrup.

Claims (29)

1. A method of forming a long tubular metal component with a cross-sectional structure such that it consists of a first cross-sectional dimension larger than a second cross-sectional dimension perpendicular to the first. This method utilizes a template assembly with a first and second template elements that have interoperable surfaces to define a template cavity with a first cross-sectional dimension larger than a second cross-sectional dimension generally perpendicular to the first. This template cavity has a closed box-shaped cross-sectional structure. The method involves rolling a sheet of metal to form a tubular stirrup with an elliptical cross-section. This elliptical cross-section has a major axis along its larger diameter and a minor axis along its smaller diameter. These major and minor axes are generally perpendicular to each other. This tubular stirrup is inserted into the second template element, which is then constructed and positioned to accommodate the elliptical tubular stirrup. As previously stated, without distorting the elliptical cross-section of the aforementioned tubular metal stirrup, the tubular metal stirrup is inserted into the second mold element in such a way that the aforementioned major axis of its elliptical cross-section generally protrudes in the same direction as the first cross-sectional dimension when the first and second mold elements work together to form the mold cavity, and in such a way that the aforementioned major axis of its elliptical cross-section when the first and second mold elements work together to form the mold cavity, the tubular metal stirrup has a diameter along its secondary axis that is close to the aforementioned second cross-sectional dimension of the mold cavity. The opposite ends of the tubular metal stirrup are hooked to the end-hooking element to effectively seal the opposite ends of the tubular metal stirrup, closing the mold assembly, and the injection of pressurized fluid into the tubular metal stirrup inserted into the mold cavity causes the tubular metal stirrup to expand to conform to the surface defined as the mold cavity. 2. The method of claim 1, which also involves creating relative movement between the aforementioned first and second template elements to close the aforementioned template cavity without distorting the elliptical cross-section of the aforementioned tubular metal stirrup placed there, 3. Method of Claim 2: The aforementioned method also involves gradually reducing the cross-sectional area of the aforementioned mold cavity in sequence after the aforementioned mold cavity is closed in order to reshape the elliptical cross-section of the aforementioned tubular metal stirrup within the aforementioned mold cavity after the aforementioned mold cavity is closed. 4. Method of claiming right 2, where the first template element mentioned above consists of a movable upper template element, the method mentioned above also involves moving the movable upper template element to close the template cavity mentioned above. 5. Method of claim 4, whereby the aforementioned second forming element consists of a fixed forming element, and whereby the aforementioned method also involves the movement of the movable upper forming element relative to the aforementioned fixed forming element after the aforementioned forming cavity is closed in order to gradually reduce the cross-sectional area of the aforementioned forming cavity in sequence after the aforementioned forming cavity is closed and thus deform the elliptical cross-section of the aforementioned tubular metal stirrup within the aforementioned forming cavity after the aforementioned forming cavity is closed. 6. Method of claim 5, whereby the aforementioned second form element also comprises a movable lower form element, and by the aforementioned method also involves the attachment of the movable upper form element to the movable lower form element to close the aforementioned form cavity, and the movement of the movable lower form element and the movable upper form element relative to the aforementioned fixed form element to gradually reduce the cross-sectional area of the aforementioned form cavity after the aforementioned form cavity is closed and thus deform the elliptical cross-section of the aforementioned tubular stirrup within the aforementioned form cavity after the aforementioned form cavity is closed. 7. Method of claim 1, where the first, larger cross-sectional dimension of the aforementioned mold cavity protrudes generally in the vertical direction, and where the second, aforementioned cross-sectional dimension of the aforementioned mold cavity protrudes generally in the horizontal direction, and where the second, aforementioned cross-sectional dimension of the aforementioned mold cavity is larger than the outer diameter of the aforementioned tubular metal stirrup along the aforementioned secondary axis, and where the insertion procedure also consists of orienting the aforementioned tubular metal stirrup within the aforementioned mold cavity in such a way that the aforementioned primary axis of its cross-section protrudes generally vertically and in such a way that the aforementioned secondary axis of its cross-section protrudes generally horizontally. 8. Method of Claim 1, whereby the aforementioned cavity-defining surfaces work together to provide the aforementioned cavity with a significantly rectangular cross-section, and whereby the injection causes the aforementioned tubular metal stirrup to expand outward to conform to the aforementioned surfaces to provide a long tubular metal assembly formed with a significantly rectangular cross-section. 9. The method of claim 1 also involves clamping the spaced sections of the tubular metal stirrup with clamping elements positioned at opposite ends of the form cavity. Such clamping elements exhibit a clamping surface defined as an elliptical outline, significantly corresponding to the elliptical outer surface of the tubular metal stirrup. 10. The method of claim 1 also involves compressing the aforementioned tubular metal stirrup lengthwise to replenish the wall thickness of the aforementioned tubular metal stirrup as it expands. 11. Method of claiming claim 1, whereby the enclosed box-shaped cross-section encompasses the four corners. 12. Method of claiming in clause 11, whereby the closed box-shaped cross-sectional outline of the cavity, as described above, is of various quadrilateral forms and thus contains no more than four corners as described above. 13. Equipment for shaping tubular stirrups is a long, tubular metal assembly with a box-shaped cross-section. This box-shaped cross-section significantly encompasses the four corners. The equipment comprises a mold assembly with an internal mold surface defined as a mold cavity. This mold cavity has a primarily box-shaped surface outline encompassing the four corners and is constructed and arranged to accommodate a tubular stirrup of typical elliptical cross-section. Clamping elements are positioned on opposite ends of the mold cavity and are constructed and arranged to securely clamp the spaced sections of the tubular stirrup. These clamping elements exhibit clamping surfaces defined as typically elliptical surface outlines that generally correspond to the typical elliptical outer contour of the tubular stirrup. End-connecting elements are constructed and arranged to securely connect and seal the opposite ends of the tubular stirrup. These end-connecting elements exhibit a typically elliptical outer surface outline that corresponds to the typical elliptical inner contour of the tubular stirrup. 14. Equipment of the claim in paragraph 13, whereby the aforementioned template assembly consists of a movable top template element and a second template element consisting of a fixed template element, the aforementioned movable top template element and the second movable template element can act together to form the aforementioned template cavity, whereby the relative movement between the movable top template element and the second template element closes the aforementioned template cavity, and whereby after the aforementioned template cavity is closed, the movement of the aforementioned movable top template element relative to the fixed template element gradually reduces the cross-sectional area of the aforementioned template cavity to deform the tubular stirrup within the aforementioned template cavity. 15. Equipment of claim 14 whereby the aforementioned second template element also contains a movable lower template element, and whereby the movable upper template element is supported within the opening in the aforementioned movable lower template element, and whereby the aforementioned movable upper template element moves to engage with the aforementioned movable lower template element to close the aforementioned template opening. 16. The equipment of claim 15, whereby the aforementioned movable lower forming element is mounted on a number of compression spring assemblies, whereby the aforementioned movable upper forming element is lowered and engaged with the aforementioned movable lower forming element to close the aforementioned forming cavity, and whereby the downward continuous motion of the aforementioned movable upper forming element is carried down with it by resistance to the force of the aforementioned spring assembly, and whereby the aforementioned movable upper and lower forming elements are constructed and arranged so that the aforementioned downward continuous motion of the aforementioned movable upper forming element and the aforementioned downward continuous motion of the aforementioned movable lower forming element reduce the cross-sectional area of the aforementioned forming cavity to deform the tubular metal stirrup. 17. Equipment of claim 13, where the aforementioned clamping surfaces are defined as generally elliptical contours, each contour transforming into a box-shaped contour as the aforementioned clamping surfaces extend inward into the aforementioned mold cavity. 18. Equipment of claim 13 where the aforementioned mold cavity has a generally rectangular surface outline. 19. Equipment of claim 13 where the cross-sectional function of the aforementioned box-shaped cavity, the template is of various rectangular shapes, thus having no more than four angles. 20. Method of Forming Longitudinal Tubular Metal Components. The aforementioned longitudinal tubular metal component is formed in a mold cavity with a surface prepared and arranged to provide a mold cavity with a general shape corresponding to the shape of the aforementioned longitudinal tubular component. The mold cavity has a closed box-like cross-section. The cross-section of the aforementioned longitudinal tubular component and the mold cavity thus have a relatively larger dimension relative to its relatively smaller dimension. The method involves inserting a tubular stirrup, rolled to have a generally elliptical cross-section, into the mold cavity and orienting the stirrup such that the relatively larger dimension relative to the generally elliptical cross-section generally protrudes in the direction of the relatively larger dimension of the mold cavity and in a manner that the relatively smaller dimension relative to the generally elliptical cross-section generally protrudes in the direction of the relatively smaller dimension of the mold cavity. The relatively smaller dimension of the generally elliptical cross-section is smaller than the larger dimension relative to ... However, the estimate is generally considerably smaller than the cross-sectional dimensions of the mold cavity mentioned earlier. The clamping and sealing of the opposite ends of the tubular stirrup, the closure of the mold assembly, and the injection of fluid under pressure into the tubular stirrup expands it to conform to the surface defined as the mold cavity, thus transforming the aforementioned tubular stirrup into the elongated stirrup mentioned earlier. 21. The method of claim 20, which also involves rolling and shaping the sheet metal to prepare the aforementioned tubular metal flanges with an elliptical cross-section. 22. The method of claim 21 also involves reducing the cross-sectional area of the aforementioned form cavity after the aforementioned tubular metal stirrup has been placed in it, and after the aforementioned form cavity has been closed, so as to compress the aforementioned elliptical cross-section of the aforementioned tubular metal stirrup with the aforementioned surface that defines the aforementioned form cavity. 23. Method of Claim 20 where the aforementioned mold cavity has a primarily box-shaped surface outline and the aforementioned long tubular metal assembly is formed to have a primarily box-shaped cross-section. 24. The method of claim 20 also involves compressing the aforementioned tubular stirrup longitudinally to replenish the wall thickness of the aforementioned tubular stirrup as it expands. 25. The method of claim 20, whereby the aforementioned closed box-shaped cross-section encompasses all four corners. 26. Method of claim 25 where the aforementioned cross-sectional outline of the mold cavity is one of several quadrilateral shapes, thus having no more than four such angles. 27. The method of forming elongated tubular metal components with such a cross-sectional structure, where the elongated tubular metal component includes a first cross-sectional dimension which is larger than the second cross-sectional dimension and is generally perpendicular to the first cross-sectional dimension. The described method utilizes a molding assembly, with the first and second molding elements having a surface capable of working together to confine the mold cavity, where the first cross-sectional dimension is larger than the second cross-sectional dimension and is generally perpendicular to the first cross-sectional dimension. The described method consists of: a sheet of metal being rolled to create a tubular stirrup with an elliptical cross-section; the aforementioned elliptical cross-section includes a major axis with a larger diameter than the elliptical cross-section and a minor axis with a smaller diameter than the elliptical cross-section. The major and minor axes are generally perpendicular to another axis. Placing the tubular stirrup onto the molding element; the second molding element is used to create and arrange the tubular stirrup with the aforementioned elliptical cross-section. The aforementioned tubular metal stirrup, with its elliptical cross-section, is placed into the second molding element until the principal axis of the elliptical cross-section of the tubular metal stirrup generally expands in the same direction as the first cross-sectional dimension when the second molding element operates to create the mold cavity. Similarly, the secondary axis of the elliptical cross-section of the tubular metal stirrup generally expands in the same direction as the second cross-sectional dimension of the mold cavity when the first and second molding elements operate to create the mold cavity. Opposite ends of the tubular metal stirrup are then fastened with end-tightening elements to seal them. Pressurized fluid is injected into the tubular metal stirrup placed in the mold cavity to distribute the stirrup evenly across the cavity's defined surface. This results in relative movement between the first and second molding elements to close the mold cavity without cross-sectional distortion. The elliptical shape of the tubular metal stirrup is arranged within the tubular metal stirrup, and the gradual reduction of the cross-sectional area of the mold cavity is achieved after closing the mold cavity due to the deformation of the elliptical cross-section of the tubular metal stirrup within the mold cavity after closing the mold cavity. 28. Equipment for shaping tubular stirrups into elongated tubular components, primarily with a box-shaped cross-section. This equipment comprises a molding component with an internal molding surface defining a molding cavity. This molding cavity has a box-shaped surface outline and is constructed and arranged to obtain a tubular stirrup with a typical elliptical cross-section. Clamping elements are positioned on opposite ends of the molding cavity and are constructed and arranged to clamp the spaced sections of the tubular stirrup. These clamping elements exhibit clamping surface areas defining a typical elliptical surface outline, which generally corresponds to the typical elliptical outer surface of the tubular stirrup. End clamping elements are constructed and arranged to clamp and seal the opposite ends of the tubular stirrup. These end clamping elements exhibit an elliptical outer surface outline, which generally corresponds to the typical elliptical inner outer surface of the tubular stirrup. The molding component comprises: a movable upper molding element; a second molding element which includes a fixed molding outline; the aforementioned movable upper molding element; and a third molding element. The two aforementioned operations are designed to confine the aforementioned mold cavity, whereby the relative movement between the movable upper mold element and the second aforementioned mold element closes the mold cavity, and whereby, after closing the mold cavity, the movement of the movable upper mold element with respect to the form element through the aforementioned attachment gradually reduces the cross-sectional area of the mold cavity, thereby deforming the tubular metal flange inside the mold cavity. 29. Equipment for shaping tubular stirrups into elongated tubular components, primarily with a box-shaped cross-section. This equipment comprises: a molding element with an internal surface defining the mold cavity; this mold cavity primarily has a box-shaped surface outline and is constructed and arranged to obtain a tubular stirrup with a generally elliptical cross-section; clamping elements positioned on the opposite ends of the mold cavity and constructed and arranged to clamp the spaced sections of the tubular stirrup; these clamping elements exhibit gripping surfaces defining a generally elliptical surface outline, which generally corresponds to the generally elliptical outer surface of the tubular stirrup; and end-connecting elements constructed and arranged to connect and seal the opposite ends of the tubular stirrup. These end-connecting elements exhibit an generally elliptical outer surface outline, which generally corresponds to the generally elliptical inner surface of the tubular stirrup. The clamping surfaces exhibit generally elliptical surface outlines, as described, each transitioning into a U-shaped box-shaped outline as the clamping surfaces extend inward into the mold cavity.