Heating device for pressurizing cavity of warm isostatic pressing machine

Abstract

The utility model discloses a heating device for a pressurizing cavity of a warm isostatic pressing machine, which comprises the pressurizing cavity, a cavity is coaxially arranged on the pressurizing cavity, an oil injection channel is arranged on the pressurizing cavity, and the oil injection channel is spirally distributed along the axial direction of the cavity. The pressurizing device has the advantages that the circulating hot fluid is injected into the oil injection channel, so that the temperature of the pressurizing cavity rises and is not changed, heat loss of pressurizing oil in the cavity is avoided, heat can be conducted to the pressurizing oil in the reverse direction, the temperature of the pressurizing oil can be kept constant during operation, and the working efficiency is improved. Therefore, the machining quality of the workpiece is ensured.

Description

Technical field:

[0001] The utility model belongs to the field of warm isostatic presses, and in particular relates to a pressurized cavity heating device for a warm isostatic press. Background technology:

[0002] An isostatic press is a molding machine operating under ultra-high pressure. Isostatic pressing involves placing the object being processed in a specific mold. This mold, containing the workpiece, is then placed in a sealed container (commonly known as a pressurized chamber). Oil is gradually injected into the container through an external pressurization system. The oil transfers pressure, applying equal pressure to all surfaces of the object. The object is then formed within the constraints of the mold. During the compression process, the distance between the molecules of the workpiece decreases, increasing its density and causing changes in the physical and even chemical properties of the pressed object.

[0003] Isostatic presses are divided into cold isostatic presses at room temperature, warm isostatic presses at medium temperature, and hot isostatic presses at high temperature. Taking the use of warm isostatic presses as an example, during operation, plugs seal both ends of the pressurized cavity. At this time, the external pressurization system injects heated oil into the cavity of the pressurized cavity and completes the forming of the workpiece through continuous pressurization. During this process, since the pressurized cavity is made of cylindrical metal material with certain thermal conductivity, the hot oil in the cavity will transfer some of the heat to the pressurized cavity in a cold state, resulting in heat loss of the pressurized oil in the cavity and the inability to maintain a constant oil temperature, which has an adverse effect on the isostatic pressing process. Summary of the invention:

[0004] The purpose of the utility model is to provide a warm isostatic press press cavity heating device, which overcomes the shortcomings of the above-mentioned prior art and effectively solves the existing problem of unstable pressurized oil temperature.

[0005] The content of the utility model: A warm isostatic press press cavity heating device includes a pressurized cavity, a cavity is coaxially opened on the pressurized cavity, an oil injection channel is opened on the pressurized cavity, and the oil injection channel is spirally distributed along the axial direction of the cavity.

[0006] Furthermore, a heating ring is coaxially sleeved on the outer circumferential surface of the pressurized cavity.

[0007] Furthermore, the heating coil is a ceramic heating coil.

[0008] The beneficial effects of the present invention are as follows: by injecting circulating hot fluid into the oil injection channel, not only can the temperature of the pressurized cavity itself be increased and kept constant, thus avoiding the loss of heat of the pressurized oil in the cavity, but also heat can be transferred back to the pressurized oil, so that the temperature of the pressurized oil can be kept constant during operation, thereby ensuring the processing quality of the workpiece. Description of the drawings:

[0009] Figure 1 This is the main view of the utility model;

[0010] Figure 2 It is a right side view of the utility model;

[0011] Figure 3 It is a partial cross-sectional view of the main view of the utility model;

[0012] In the figure, 1 is a pressurized cavity, 2 is a cavity, 3 is an oil injection channel, and 4 is a heating ring. Specific implementation method:

[0013] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings:

[0014] like Figures 1 to 3 As shown, a warm isostatic press pressurizing cavity heating device includes a pressurizing cavity 1, a cavity 2 is coaxially opened on the pressurizing cavity 1, an oil injection channel 3 is opened on the pressurizing cavity 1, and the oil injection channel 3 is spirally distributed along the axial direction of the cavity 2. A heating ring 4 is coaxially sleeved on the outer circumference of the pressurizing cavity 1, and the heating ring 4 is a ceramic heating ring.

[0015] Specifically, by injecting circulating hot fluid into the oil injection channel 3, not only can the temperature of the pressurized cavity 1 itself be increased and kept constant, thereby avoiding the loss of heat from the pressurized oil in the cavity 2, but heat can also be transferred back to the pressurized oil, so that the temperature of the pressurized oil can be kept constant during operation.

[0016] During actual use, the workpiece is first loaded into the cavity 2, and the plugs of the warm isostatic press are operated to seal the openings at both ends of the cavity 2. At this time, the external hot fluid with the same temperature as the pressurized oil is injected through any port of the oil injection channel 3. When the external hot fluid circulates in the oil injection channel 3, the heat of the hot fluid itself can be transferred to the pressurized cavity 1 to increase its temperature. During this period, the temperature of the pressurized cavity 1 can be measured using a thermometer. When the temperature of the pressurized cavity 1 is the same as the temperature of the pressurized oil, the pressurized hot oil in the external pressurization system can be injected into the cavity 2 of the pressurized cavity 1. At this time, since the temperature of the pressurized cavity 1 is the same as the temperature of the pressurized oil, the pressurized oil in the cavity 2 can maintain a constant temperature during operation, thereby ensuring the processing quality of the workpiece.

[0017] The oil injection channel 3 distributed axially and spirally in the cavity 2 allows the external hot fluid to evenly and quickly transfer heat energy to the pressurized cavity 1; when the external temperature is low, in order to make the temperature of the pressurized cavity 1 and the pressurized oil more stable, the ceramic heating ring 4 can be turned on to further assist in heating the pressurized cavity 1; since the other mechanical structures of the warm isostatic press belong to the existing technology, they are not described in detail.

[0018] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A warm isostatic press press cavity heating device, comprising a press cavity (1), a cavity (2) coaxially opened on the press cavity (1), characterized in that: An oil injection channel (3) is provided on the pressurized cavity (1), and the oil injection channel (3) is distributed in a spiral shape along the axial direction of the cavity (2).

2. The warm isostatic press press cavity heating device according to claim 1, characterized in that: A heating ring (4) is coaxially mounted on the outer circumferential surface of the pressurized cavity (1).

3. The warm isostatic press press cavity heating device according to claim 2, characterized in that: The heating coil (4) is a ceramic heating coil.

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