Hydraulic press with a pressure cell and a method and use for it, whose press body consists of prestressed lamellas
AssigneeAvure Technologies AB
InventorKeijo Hellgren
Life of this patent
Estimating the term…
Abstract
A press of pressure cell type includes a press body part. The press body part comprises a number of plates with the planes of the plates oriented parallel to the planes of the adjacent plates. Each plate has a through hole which has the same center axis as the hole of the adjacent plates. Prestressing bands which induce a compressing prestress acting in the planes of the plates are arranged on an external edge surface of each of the plates.
Claims30
A press comprising:
- a press chamber including a pressure cell, the press chamber having a main axis;
- and
- a force-absorbing press body enclosing the press chamber, the press body including a number of plates, each plate having
- an internal edge surface defining a through hole having a center axis,
- an external edge surface, and
- a prestressing element wound around the external edge surface;
- wherein the number of plates are parallel to each other, such that the center axis of each through hole coincides with the main axis of the press chamber;
- and
- wherein each prestressing element is band-shaped and has a width substantially equal to a thickness of a corresponding plate.
A method for manufacturing a force-absorbing press body part to enclose a press chamber, comprising:
- providing a plurality of plates, each of the plates having a through hole;
- inducing a lasting compressing prestress which acts in a plane of at least one of the plurality of plates by winding a band-shaped prestressing element, which has substantially the same width as a thickness of a corresponding plate, around an external edge surface of the corresponding plate;
- and
- arranging the plurality of plates parallel to each other so that a center axis of each of the through holes coincide with each other and so that the plurality of plates constitute a force-absorbing, press-chamber-enclosing press body part.
A press body part, comprising:
- a plate-shaped body;
- a through hole in the body;
- an internal edge surface which defines the hole;
- an external edge surface of the plate-shaped body;
- and
- a prestressing means arranged on the external edge surface, for inducing a compressing prestress acting in the plane of the plate-shaped body, the prestressing means including a prestressing element which is wound around the plate-shaped body and is band-shaped and has substantially the same width as the thickness of the plate-shaped body.
A method for working a part, comprising:
- placing the part within a press chamber of a press body, the press chamber having a main axis, the press body including a plurality of plates, each of the plurality of plates having a through opening formed therein with an edge of the opening defining load surfaces and the plurality of plates being positioned parallel to each other, such that a center axis of the openings of the plates coincide with the main axis of the press chamber;
- and
- pressing in against the part within the press chamber to work the part while pressing out against the load surfaces of each of the plurality of plates, at least one of the plurality of plates being prestressed by a tensioned band positioned around an outer edge thereof.
Dependencies are inferred from the claim text.