Cooling machining die capable of maintaining pressure and used for top-layer foil of elastic foil gas bearing

Abstract

The invention discloses a cooling machining die capable of maintaining pressure and used for a top-layer foil of an elastic foil gas bearing. A locating ring is matched on an upper die and connected with the upper die through bolts. The locating ring and a groove of a pressing plate of a hydraulic tensile machine are matched for locating. A half-cylinder is arranged on the lower surface of the upper die. A concave surface which is matched with the half-cylinder is arranged on a lower die. A groove is formed in the concave surface and used for installing the top-layer foil. A pull rod penetrates through a tensile bar of the hydraulic tensile machine, the pressing plate, the upper die and the lower die. The pressing plate, the upper die and the lower die are fixed through an upper nut and a lower nut. When the cooling machining die is used, the top-layer foil is clamped in the groove of the lower die and attached to the inner surface of the lower die, polyfluortetraethylene plates are placed on the top-layer foil, the hydraulic tensile machine is started , the tension of the tensile bar is utilized to make the upper die and the lower die mutually squeeze, the polyfluortetraethylene plates in the half-cylinder and the lower die are deformed, the polyfluortetraethylene plates and the inner cambered surface of the lower die are squeezed, and the top-layer foil is formed. The cooling machining die has the advantages of being simple in structure and low in cost.

Description

technical field [0001] The invention belongs to the technical field of pressure-holding cold processing molds, and in particular relates to a pressure-holding cold processing die for elastic foil gas bearing top layer foils. Background technique [0002] Elastic foil bearings have good adaptability and can run for a long time under high temperature and high speed conditions without auxiliary devices such as oil supply or control systems. Elastic foil bearings have high requirements for the surface forming accuracy of the top foil of the bearing. The material has good resilience, and its processing method has always been a very difficult problem. The main reason is that it cannot accurately meet the processing requirements, and there is a large rebound. At present, there is no special tool for processing the top foil of the elastic foil gas bearing. Pressure-holding cold-working molds. Contents of the invention [0003] In order to overcome the shortcomings of the above-me...

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Problems solved by technology

[0002] Elastic foil bearings have good adaptability and can run for a long time under high temperature and high speed conditions without auxiliary devices such as oil supply or control systems. Elastic foil bearings have high requirements for the surface forming accuracy of the top foil of the bearing. The material has good resilience, and its processing method has always been a very difficult problem. The main reason is that it cannot accurately meet the processing requirements, and there is a large rebound. At present, there is no special tool for processing the top foil of the elastic foil gas bearing. Pressure holding cold working mold

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