JPS6044144A - Production of press frame for hydrostatic pressurizing device - Google Patents

Abstract

PURPOSE:To obtain a press frame for a hydrostatic pressurizing device having high resistance to fatigue without anisotropy and internal defects by forming an annular member formed by ring forging to a flat shape. CONSTITUTION:An annular member 10 is manufactured by ring forging. The member is formed flat by rolls 11, 12 to make a yoke frame 13. The frame is used as a frame (h) for a hydrostatic pressurizing device disposed to enclose a high pressure vessel 9 against the axial force generated in the vessel 9. The frame (h) is thus easily manufactured in a way as to have hardly anisotropy and internal defects and the resistance to fatigue thereof is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a press frame for a hydrostatic pressurizing device. A hydrostatic pressurizing device is used to shape a workpiece such as a powdered sintered metal or ceramic by applying isodirectional high pressure to the workpiece at high temperature or room temperature.

An example of a conventional hydrostatic pressurizing device is shown in FIG. It consists of a lower lid (α3) that is removably fitted into the lower opening end of the main body (α1). (h) is a heating furnace, which consists of a heat insulating wall (Y) and a heating device (B2) disposed inside the heat insulating wall. The object to be processed (C) is loaded into the heating furnace <h>, and then a high-pressure inert gas such as helium or argon is introduced into the heating furnace (h) through the passages (d, ), (e), and (7'). At the same time, by supplying power to a heating device (bi) such as a heater, the object to be processed (C) is molded at high temperature by applying isodirectional high pressure. Depending on the type of object to be processed (C), if it is not necessary to perform molding at high temperatures, turn off the power supply to the heating device (b2) or remove the aluminum from the heating furnace and place the object to be processed (C) directly into a high-pressure vessel. (
It may be loaded inside α). (ri,) is a gasket that is assembled into the fitting surface of the upper lid (a2) and slides into contact with the inner surface of the cylindrical body (al), and (g2) is assembled into the fitting surface of the lower lid (a3) and is a cylinder. There is. (/=) is a press frame with a flat circular yoke 7-m (A1) arranged so as to surround the Takasho container (α).
) and the upper yoke (h2) that comes into contact with the top surface of the upper cover (a2)
and the lower yoke (/L3) that comes into contact with the lower surface of the lower cover (α3)
When high-pressure inert gas is supplied into the high-pressure container (α), the upper lid (
a2) and the lower lid (α3) are prevented from coming out from the cylindrical body (a□).

Conventionally, when manufacturing the yoke frame (HL) of the press frame (A), a method has been proposed in which a multi-layer tube made by winding strip steel plates in multiple layers is plastically deformed into a flat shape. The manufacturing equipment is large, and the production of small-sized products is time-consuming and expensive.

Furthermore, manufacturing by forging or casting not only tends to cause internal defects, but also makes molding extremely difficult.

Furthermore, as shown in FIG. 2, there is a method of laminating a large number of window frame materials, but this method causes stress concentration at the corners, resulting in problems with fatigue strength.

The present invention has been proposed to solve the above-mentioned problems, and its gist is that the toro is arranged so as to surround a high-pressure container, and is capable of applying hydrostatic pressure to counter the *11 force generated in the high-pressure container. A method for manufacturing a press frame for a hydrostatic pressurizing device is characterized in that a ring-shaped member is manufactured by ring forging and then formed into a flat shape.

In the present invention, a ring-shaped member is manufactured by ring forging, and this is formed into a flat shape to manufacture a press frame. , and the fatigue strength is improved without causing anisotropy or stress concentration at the corners as in the case where the window frame material shown in FIG. 2 is layered.

Moreover, it is simple and easy to manufacture, and can be manufactured at low cost.

FIG. 3 shows an example of the present invention, in which a ring-shaped member aO1 is first manufactured by ring forging as shown in A,
This is formed into a flat shape (as shown in Bl) using a roll (11) and θ2 to form a yoke frame (13+).

Therefore, the link-like member OU is manufactured by ring forging, and the equipment is not particularly large, and the back production is relatively simple and easy, and its shape is also relatively simple, so there are no internal defects. will not occur. Since this ring-shaped member fltll is formed into a flat shape, the direction of the high-strength cutting line coincides with the axial force generated in the raised container around the entire circumference, so anisotropy and stress concentration areas will not occur. (Thus, its fatigue strength is improved.

In addition, the yoke frame Q3 manufactured as described above
), the above-mentioned yoke and lower yoke may be loaded onto both ends of the press frame to form a press frame.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing a conventional hydrostatic pressurizing device, FIG. 2 is a perspective view showing another example of a conventional press frame, and FIG. 6 is a different process of an embodiment of the present invention. FIG.

Claims (1)

[Claims] A press frame for a hydrostatic pressurizing device, which is arranged to surround a high-pressure vessel and counteract the axial force generated in the high-pressure vessel, became popular, and a ring-shaped member was manufactured by ring forging, which was then formed into a flat shape. Manufacturer's method for a press frame for a hydrostatic pressurizing device, characterized in that: