Equipment and process for sintering titanium alloy based on graphite vacuum sintering furnace

Abstract

The invention relates to equipment and technology for sintering titanium alloy based on a graphite vacuum sintering furnace, and the equipment comprises a furnace body which is internally provided with a graphite box; the vacuumizing device is communicated with the graphite box; the heating device comprises a water-cooling medium-frequency induction coil assembly, a heat conduction and insulation assembly and an auxiliary temperature control assembly, and the heat conduction and insulation assembly is connected with the water-cooling medium-frequency induction coil assembly and the auxiliary temperature control assembly and is arranged between the water-cooling medium-frequency induction coil assembly and the auxiliary temperature control assembly in a heat conduction and insulation mode; the water-cooling medium-frequency induction coil assembly is arranged outside the graphite box and used for heating the graphite box, and the auxiliary temperature control assembly is used for exchanging heat with the water-cooling medium-frequency induction coil assembly when the graphite box is heated by the water-cooling medium-frequency induction coil assembly so as to assist in adjusting the temperature rise when the graphite box is heated by the water-cooling medium-frequency induction coil assembly. The adjusting process can be quickly responded in place, and the response time is shortened; meanwhile, accurate and in-place adjustment can be guaranteed, and the precision of the adjustment process is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of titanium alloy sintering, and in particular to a device and process for sintering titanium alloy based on a graphite vacuum sintering furnace. BACKGROUND

[0002] Titanium alloy parts can be sintered in a vacuum environment by a sintering furnace. A common sintering furnace for titanium alloy parts is a molybdenum wire furnace. However, the cost of sintering titanium alloy parts by using a molybdenum wire furnace is relatively high. Therefore, under the premise of ensuring that titanium alloy parts are not easily contaminated by carbon and oxygen penetration, a graphite furnace can be used to sinter titanium alloy parts in the prior art. The protection measures include but are not limited to setting a protective coating, such as a zirconia layer. However, the heating device of the graphite vacuum sintering furnace in the prior art cannot meet the strict requirements for temperature control during the sintering process of titanium alloy parts. SUMMARY

[0003] In order to improve the problem that the heating device of the graphite vacuum sintering furnace in the prior art cannot achieve accurate temperature control, the present application provides a device and process for sintering titanium alloy based on a graphite vacuum sintering furnace.

[0004] In a first aspect, the present application provides a device for sintering titanium alloy based on a graphite vacuum sintering furnace, comprising:

[0005] A furnace body, wherein a graphite box is arranged in the furnace body, and the graphite box is used for sintering titanium alloy parts in a vacuum environment;

[0006] A vacuum pumping device, which is in communication with the graphite box and is used for forming a vacuum environment in the graphite box;

[0007] A heating device, which is arranged in the furnace body, and the heating device comprises a water-cooled medium-frequency induction coil assembly, a heat-conducting and insulating assembly, and an auxiliary temperature control assembly. The heat-conducting and insulating assembly connects and is arranged in thermal conduction and insulation between the water-cooled medium-frequency induction coil assembly and the auxiliary temperature control assembly. The water-cooled medium-frequency induction coil assembly is arranged outside the graphite box and is used for heating the graphite box. The auxiliary temperature control assembly is used for heat exchange with the water-cooled medium-frequency induction coil assembly when the water-cooled medium-frequency induction coil assembly heats the graphite box, so as to assist in adjusting the temperature rise of the graphite box when the water-cooled medium-frequency induction coil assembly heats the graphite box. The temperature rise of the graphite box includes a first temperature rise in a first temperature range and a second temperature rise in a second temperature range. The first temperature range is smaller than the second temperature range, and the first temperature rise is greater than the second temperature rise.

[0008] Optionally, the heat-conducting and insulating assembly comprises a fixing column and a limiting sleeve, the fixing column is arranged outside the water-cooled intermediate frequency induction coil assembly, and the limiting sleeve is arranged on the fixing column, and the auxiliary temperature control assembly is connected with the limiting sleeve.

[0009] Optionally, the limiting sleeve is provided with a limiting clamping groove, and the auxiliary temperature control assembly is arranged on the limiting sleeve and arranged in the limiting clamping groove.

[0010] Optionally, the water-cooled intermediate frequency induction coil assembly comprises a first water-cooled pipe, and the auxiliary temperature control assembly comprises a second water-cooled pipe, and the first water-cooled pipe and the second water-cooled pipe are both made of oxygen-free copper material.

[0011] Optionally, the first water-cooled pipe is provided with a square cross section, the fixing column is threadedly connected to one plane of the first water-cooled pipe, the second water-cooled pipe is provided with a circular cross section, and the limiting clamping groove is matched with the second water-cooled pipe in shape.

[0012] Optionally, the fixing column and the limiting sleeve are both made of ceramic material.

[0013] Optionally, the water-cooled intermediate frequency induction coil assembly is arranged in a spiral shape outside the graphite box, the heat-conducting and insulating assembly is arranged in a plurality of groups along the extension direction of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly, the plurality of groups of heat-conducting and insulating assemblies are arranged on two turns of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly, and the auxiliary temperature control assembly is arranged in an "S" shape between the plurality of groups of heat-conducting and insulating assemblies on the two turns of the water-cooled intermediate frequency induction coil assembly.

[0014] Optionally, the auxiliary temperature control assembly is arranged in a plurality of groups along the axial direction of the water-cooled intermediate frequency induction coil assembly.

[0015] Optionally, the device further comprises a heat preservation device, the heat preservation device is arranged in the furnace body and arranged outside the heating device and the graphite box, and the heat preservation device is used for heat preservation of the heating device and the graphite box.

[0016] In a second aspect, the present application provides a process for sintering titanium alloy based on a graphite vacuum sintering furnace, and the process uses any one of the devices for sintering titanium alloy based on a graphite vacuum sintering furnace provided by the present application to sinter titanium alloy parts.

[0017] The application sets the heating device as at least a water-cooled medium-frequency induction coil assembly, a heat-conducting insulation assembly and an auxiliary temperature control assembly, and the auxiliary temperature control assembly exchanges heat with the water-cooled medium-frequency induction coil assembly when the water-cooled medium-frequency induction coil assembly heats the graphite box, so as to assist in adjusting the temperature rise of the water-cooled medium-frequency induction coil assembly when heating the graphite box. When the temperature in the graphite box rises from the first temperature range to the second temperature range, and the first temperature rise in the first temperature range is reduced to the second temperature rise in the second temperature range, the adjustment process quickly responds to the right position and shortens the response time. At the same time, the adjustment can be accurately adjusted to the right position, and the accuracy of the adjustment process can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of an equipment for sintering titanium alloy based on a graphite vacuum sintering furnace provided by an embodiment of the application.

[0019] Figure 2 is a structural schematic diagram of a heating device of an equipment for sintering titanium alloy based on a graphite vacuum sintering furnace provided by an embodiment of the application.

[0020] Figure 3 is Figure 2 is an enlarged view of part A in FIG. 4.

[0021] Legend: 100, furnace body; 110, rack; 120, furnace cover; 200, graphite box; 210, box cover; 300, vacuumizing device; 400, heating device; 410, water-cooled medium-frequency induction coil assembly; 411, first water-cooled pipe; 420, heat-conducting insulation assembly; 421, fixed column; 422, limiting sleeve; 4221, limiting clamping groove; 430, auxiliary temperature control assembly; 431, second water-cooled pipe; 500, heat preservation device; 510, heat preservation cover; 600, telescopic driving device. DETAILED DESCRIPTION

[0022] The following will be described in detail in combination with the accompanying Figures 1-3 The application will be further described in detail.

[0023] As described in the background, when sintering a titanium alloy part by using a graphite vacuum sintering furnace, the temperature rising process to the sintering temperature can be set as a multi-stage temperature rising curve, for example, when the temperature is below 1600℃, the temperature rising rate can be 20℃ / min; and when the temperature is above 1600℃, the temperature rising rate can be 5℃ / min. By this setting, the phenomenon of uneven thermal expansion of the titanium alloy part or damage of the graphite vacuum sintering furnace caused by too fast temperature rising can be avoided. However, the control of the temperature rising rate of the graphite vacuum sintering furnace depends on the cooling structure of the heating device thereof, and the cooling structure of the existing heating device of the graphite vacuum sintering furnace usually adopts air cooling or water cooling. For the existing air cooling structure, the adjustment process of the cooling rate is relatively slow, and the response time is relatively long; and for the existing water cooling structure, although the adjustment process of the cooling rate is relatively fast, the adjustment precision is relatively poor, and it is difficult to accurately adjust to the position. That is, the existing heating device of the graphite vacuum sintering furnace is difficult to meet the strict requirements of the temperature control of the titanium alloy part in the sintering process.

[0024] Based on this, an embodiment of the present application provides a device for sintering a titanium alloy based on a graphite vacuum sintering furnace, the device comprising:

[0025] a furnace body 100, a graphite box 200 is arranged in the furnace body 100, and the graphite box 200 is used for sintering a titanium alloy part in a vacuum environment;

[0026] a vacuumizing device 300, which is in communication with the graphite box 200 and is used for forming a vacuum environment in the graphite box 200;

[0027] a heating device 400, which is arranged in the furnace body 100, and the heating device 400 comprises a water-cooled medium-frequency induction coil assembly 410, a heat-conducting and insulating assembly 420, and an auxiliary temperature control assembly 430, the heat-conducting and insulating assembly 420 is connected with and arranged in heat conduction and insulation between the water-cooled medium-frequency induction coil assembly 410 and the auxiliary temperature control assembly 430, the water-cooled medium-frequency induction coil assembly 410 is arranged outside the graphite box 200 and is used for heating the graphite box 200, and the auxiliary temperature control assembly 430 is used for exchanging heat with the water-cooled medium-frequency induction coil assembly 410 when the water-cooled medium-frequency induction coil assembly 410 heats the graphite box 200, so as to assist in adjusting the temperature rise of the graphite box 200 when the water-cooled medium-frequency induction coil assembly 410 heats the graphite box 200, and the temperature rise of the graphite box 200 comprises a first temperature rise in a first temperature interval and a second temperature rise in a second temperature interval, the first temperature interval is smaller than the second temperature interval, and the first temperature rise is greater than the second temperature rise.

[0028] As Figure 1As shown, in the present embodiment, it is exemplarily illustrated that the device can comprise a furnace body 100, which can be provided in a cylindrical shape and can be horizontally arranged on a rack 110. At least one end of the furnace body 100 can be provided with an openable and closable furnace cover 120, and by controlling the opening and closing of the furnace cover 120, the arrangement of the titanium alloy parts to be sintered in the furnace body 100 can be realized.

[0029] As shown, Figure 1 The furnace body 100 can be provided with a graphite box 200 inside, and the titanium alloy parts to be sintered can be arranged in the graphite box 200. The graphite box 200 can be provided with a support structure, such as a support column or a sintering platform, etc., for placing the titanium alloy parts. The graphite box 200 can also be provided in a cylindrical structure, and at least one end thereof can be provided with an openable and closable box cover 210. When sintering the titanium alloy parts, a vacuum environment is formed inside the graphite box 200.

[0030] As shown, Figure 1 The device can further comprise a vacuum pumping device 300 for forming a vacuum environment inside the graphite box 200, so as to facilitate high-temperature sintering of the titanium alloy parts inside the graphite box 200.

[0031] As shown, Figure 1 and Figure 2As shown, when high-temperature sintering is performed on the titanium alloy piece, the graphite box 200 and the titanium alloy piece arranged in the graphite box 200 can be heated by the heating device 400. The heating device 400 can be arranged in the furnace body 100, and can include a water-cooled intermediate-frequency induction coil assembly 410, a heat-conducting insulation assembly 420, and an auxiliary temperature control assembly 430. The water-cooled intermediate-frequency induction coil assembly 410 can be arranged outside the graphite box 200, and can heat the graphite box 200 and the titanium alloy piece arranged in the graphite box 200 by generating eddy current through an alternating magnetic field based on the principle of electromagnetic induction and converting the eddy current into heat energy. During the heating process, the water-cooled intermediate-frequency induction coil assembly 410 can also control its heating temperature within a certain range by water cooling, so that the temperature rising rate of the sintered titanium alloy piece meets the requirements. The auxiliary temperature control assembly 430 can be arranged outside the water-cooled intermediate-frequency induction coil assembly 410, and can be connected with the water-cooled intermediate-frequency induction coil assembly 410 through the heat-conducting insulation assembly 420. The heat-conducting insulation assembly 420 can play a role of heat conduction and insulation between the auxiliary temperature control assembly and the water-cooled intermediate-frequency induction coil assembly 410. The auxiliary temperature control assembly 430 can exchange heat with the water-cooled intermediate-frequency induction coil assembly 410 under the heat conduction of the heat-conducting insulation assembly 420 when the water-cooled intermediate-frequency induction coil assembly 410 heats the graphite box 200, so as to assist in adjusting the temperature rise of the graphite box 200 when the water-cooled intermediate-frequency induction coil assembly 410 heats the graphite box 200. The temperature rise of the graphite box 200 can include a first temperature rise in a first temperature interval and a second temperature rise in a second temperature interval. The first temperature interval can be smaller than the second temperature interval, and the first temperature rise can be greater than the second temperature rise.

[0032] In the present embodiment, for example, the first temperature range can be 1600°C or lower, and the first temperature rise can be 20°C / min. When the temperature in the graphite box 200 is 1600°C or lower, the water-cooled intermediate-frequency induction coil assembly 410 can control its heating temperature by its own water cooling effect when heating the graphite box 200, but the effect of temperature control by the water cooling effect of the water-cooled intermediate-frequency induction coil assembly 410 itself is relatively limited, and it is prone to the phenomenon of excessively high heating temperature of the water-cooled intermediate-frequency induction coil assembly 410. When the heating temperature of the water-cooled intermediate-frequency induction coil assembly 410 is too high, the temperature rise rate in the graphite box 200 is increased compared with 20°C / min, at which time the auxiliary temperature control assembly 430 can work, which can exchange heat with the water-cooled intermediate-frequency induction coil assembly 410 to take away part of the heat of the water-cooled intermediate-frequency induction coil assembly 410, thereby reducing the heating temperature of the water-cooled intermediate-frequency induction coil assembly 410 to the graphite box 200; and further, after the adjustment of the auxiliary temperature control assembly 430, when the heating temperature of the water-cooled intermediate-frequency induction coil assembly 410 is reduced, if the temperature rise rate in the graphite box 200 is reduced too much and less than 20°C / min, the auxiliary temperature control assembly 430 can reduce the heat exchange with the water-cooled intermediate-frequency induction coil assembly 410 to ensure the heating temperature of the water-cooled intermediate-frequency induction coil assembly 410 to the graphite box 200, thereby accurately controlling the temperature rise rate at 20°C / min. The second temperature range can be 1600°C or higher, and the second temperature rise can be 5°C / min. When the temperature of the graphite box 200 is 1600°C or higher, and the temperature rise rate is 5°C / min, the adjustment effect of the auxiliary temperature control assembly 430 is the same.

[0033] When the temperature in the graphite box 200 increases from 1600°C or lower to 1600°C or higher, and the temperature rise rate in the graphite box 200 decreases from about 20°C / min to about 5°C / min, the water-cooled intermediate-frequency induction coil assembly 410 can reduce its heating temperature to the graphite box 200; at the same time, the auxiliary temperature control assembly 430 can increase the heat exchange with the water-cooled intermediate-frequency induction coil assembly 410 to further rapidly reduce the heating temperature of the water-cooled intermediate-frequency induction coil assembly 410 to the graphite box 200, thereby shortening the response time of the adjustment process. After the adjustment is completed, the auxiliary temperature control assembly 430 can reduce the heat exchange with the water-cooled intermediate-frequency induction coil assembly 410 to keep the heating temperature of the water-cooled intermediate-frequency induction coil assembly 410 to the graphite box 200 constant, so as to accurately adjust to the purpose, and ensure the accuracy of the adjustment process.

[0034] It can be understood that the application can assist in adjusting the temperature rise of the water-cooled medium-frequency induction coil assembly 410 when heating the graphite box 200 by setting the heating device 400 as at least the water-cooled medium-frequency induction coil assembly 410, the heat-conducting insulation assembly 420, and the auxiliary temperature control assembly 430, and by the auxiliary temperature control assembly 430 exchanging heat with the water-cooled medium-frequency induction coil assembly 410 when the water-cooled medium-frequency induction coil assembly 410 heats the graphite box 200. When the temperature in the graphite box 200 rises from the first temperature range to the second temperature range, and the first temperature rise in the first temperature range is reduced to the second temperature rise in the second temperature range, the adjustment process quickly responds to the right position and shortens the response time. At the same time, it can ensure accurate adjustment and ensure the accuracy of the adjustment process.

[0035] Specifically, the heat-conducting insulation assembly 420 includes a fixed column 421 and a limiting sleeve 422. The fixed column 421 is arranged outside the water-cooled medium-frequency induction coil assembly 410, and the limiting sleeve 422 is arranged on the fixed column 421. The auxiliary temperature control assembly 430 is connected with the limiting sleeve 422.

[0036] As shown in Figure 2 and Figure 3 , in this embodiment, the heat-conducting insulation assembly 420 can include a fixed column 421 and a limiting sleeve 422. The fixed column 421 can be arranged in a cylindrical shape and can be arranged outside the water-cooled medium-frequency induction coil assembly 410. The limiting sleeve 422 can be arranged in a circular sleeve and can be sleeved on the fixed column 421 and axially positioned by a snap ring, a pin shaft or the like. The auxiliary temperature control assembly 430 can be connected with the limiting sleeve 422, and the auxiliary temperature control assembly 430 and the water-cooled medium-frequency induction coil assembly 410 are arranged at a distance. The distance between the auxiliary temperature control assembly 430 and the water-cooled medium-frequency induction coil assembly 410 can be preferably the distance to avoid sparking between the auxiliary temperature control assembly 430 and the water-cooled medium-frequency induction coil assembly 410.

[0037] It can be understood that the heat-conducting insulation assembly 420 is arranged as at least the fixed column 421 and the limiting sleeve 422 in this embodiment, which facilitates the connection of the auxiliary temperature control assembly 430 and the water-cooled medium-frequency induction coil assembly 410 through the heat-conducting insulation assembly 420.

[0038] More specifically, the limiting sleeve 422 is provided with a limiting clamping groove 4221, and the auxiliary temperature control assembly 430 is arranged around the limiting sleeve 422 and arranged in the limiting clamping groove 4221.

[0039] As shown in Figure 2 and Figure 3As shown in the figure, in the embodiment, the outer side of the limiting sleeve 422 in the radial direction can be provided with a limiting clamping groove 4221, and the limiting clamping groove 4221 can be arranged in the middle of the limiting sleeve 422 in the axial direction. When the auxiliary temperature control assembly 430 is connected with the limiting sleeve 422, it can be arranged around the outer side of the limiting sleeve 422 and arranged in the limiting clamping groove 4221.

[0040] It can be understood that, by arranging the limiting clamping groove 4221 on the limiting sleeve 422 for the arrangement of the auxiliary temperature control assembly 430, the auxiliary temperature control assembly 430 can be limited by the limiting clamping groove 4221, so that the auxiliary temperature control assembly 430 can be kept stable, thereby avoiding the phenomenon that the auxiliary temperature control assembly 430 conducts electricity with the water-cooled intermediate frequency induction coil assembly 410 or produces sparking due to movement or shaking.

[0041] More specifically, the water-cooled intermediate frequency induction coil assembly 410 includes a first water-cooled pipe 411, and the auxiliary temperature control assembly 430 includes a second water-cooled pipe 431. Both the first water-cooled pipe 411 and the second water-cooled pipe 431 are made of oxygen-free copper material.

[0042] As shown in the figure, Figure 2 and Figure 3 In the embodiment, the water-cooled intermediate frequency induction coil assembly 410 can include a first water-cooled pipe 411, and the auxiliary temperature control assembly 430 can include a second water-cooled pipe 431. The first water-cooled pipe 411 can be used for power supply to achieve heating, and the first water-cooled pipe 411 can be used for cooling water circulation to achieve temperature control during heating; and the second water-cooled pipe 431 can also be used for cooling water circulation to achieve auxiliary adjustment of temperature during heating. Both the first water-cooled pipe 411 and the second water-cooled pipe 431 can be made of oxygen-free copper material. Oxygen-free copper material is a material with good electrical conductivity and strong heat resistance. As the material for manufacturing the first water-cooled pipe 411, it can ensure the heating effect of the water-cooled intermediate frequency induction coil assembly 410. In addition, oxygen-free copper material has high purity, which can reduce the occurrence of fouling as the material for manufacturing the first water-cooled pipe 411 and the second water-cooled pipe 431. At the same time, oxygen-free copper material has excellent formability, which facilitates the processing of the shape required for the first water-cooled pipe 411 and the second water-cooled pipe 431.

[0043] More specifically, the cross section of the first water-cooled pipe 411 is square, the fixed column 421 is threadedly connected to one plane of the first water-cooled pipe 411, the cross section of the second water-cooled pipe 431 is circular, and the shape of the limiting clamping groove 4221 is adapted to the second water-cooled pipe 431.

[0044] As shown in the figure, Figure 3As shown in the figure, in the embodiment, the cross section of the first water-cooled pipe 411 can be square, which means the cross section perpendicular to the axis of the first water-cooled pipe 411, thus the first water-cooled pipe 411 can be a square pipe. When the fixing column 421 is arranged outside the water-cooled medium-frequency induction coil assembly 410, it can be arranged on one plane of the first water-cooled pipe 411 and be screwed with the first water-cooled pipe 411, and the first water-cooled pipe 411 can be provided with nuts and other components for mounting and arranging the fixing column 421.

[0045] The cross section of the second water-cooled pipe 431 can be circular, i.e. the second water-cooled pipe 431 can be a circular pipe. The shape of the limiting slot 4221 can be an arc-shaped slot to match the second water-cooled pipe 431, and the diameter of the limiting slot 4221 can be equal to the diameter of the second water-cooled pipe 431, so that the second water-cooled pipe 431 can be just clamped in the limiting slot 4221.

[0046] It can be understood that, by setting the cross section of the first water-cooled pipe 411 to be square and the cross section of the second water-cooled pipe 431 to be circular, the heat-conducting and insulating assembly 420 can effectively connect the water-cooled medium-frequency induction coil assembly 410 and the auxiliary temperature control assembly 430, and the stability after connection can be guaranteed.

[0047] Specifically, the fixing column 421 and the limiting sleeve 422 are both made of ceramic material.

[0048] As shown in the figure, Figure 3 In the embodiment, the fixing column 421 and the limiting sleeve 422 can both be made of ceramic material, which has relatively good heat conductivity and insulation, so that the heat-conducting and insulating assembly 420 can effectively conduct heat and insulate between the water-cooled medium-frequency induction coil assembly 410 and the auxiliary temperature control assembly 430.

[0049] Specifically, the water-cooled medium-frequency induction coil assembly 410 is arranged in a spiral outside the graphite box 200, the heat-conducting and insulating assembly 420 is arranged in several groups along the extension direction of the spiral arrangement of the water-cooled medium-frequency induction coil assembly 410, the several groups of heat-conducting and insulating assemblies 420 are arranged on two turns of the spiral arrangement of the water-cooled medium-frequency induction coil assembly 410, and the auxiliary temperature control assembly 430 is arranged in an "S" shape between the several groups of heat-conducting and insulating assemblies 420 on the two turns of the water-cooled medium-frequency induction coil assembly 410.

[0050] As shown in the figure, Figure 2As shown in this embodiment, by way of example, the first water-cooling tube 411 of the water-cooled intermediate frequency induction coil assembly 410 can be configured as a coil and spirally arranged outside the graphite box 200. When the first water-cooling tube 411 is spirally arranged, one layer of winding forms one turn; and the first water-cooling tube 411 forms several turns when wound. The thermally conductive insulation components 420 can be configured as several groups, and the several groups of thermally conductive insulation components 420 can be divided into two parts and respectively arranged on two turns of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly 410. For example, the several groups of thermally conductive insulation components 420 are divided into two parts and respectively arranged on the first and last turns of the water-cooled intermediate frequency induction coil assembly 410. The second water-cooling tube 431 of the auxiliary temperature control component 430 can be arranged between the several groups of thermally conductive insulation components 420 on the two turns, and the second water-cooling tube 431 can be arranged in an "S" shape. When the second water-cooling pipe 431 of the auxiliary temperature control component 430 is arranged in an "S" shape, it may include an axial section that is parallel to the axis of the water-cooled intermediate frequency induction coil component 410.

[0051] It is understood that in this embodiment, the water-cooled intermediate frequency induction coil assembly 410 is arranged in a spiral outside the graphite box 200, and the auxiliary temperature control assembly 430 is arranged in an "S" shape between several groups of thermally conductive and insulating assemblies 420 on two turns of the water-cooled intermediate frequency induction coil assembly 410. This allows the extension direction of the auxiliary temperature control assembly 430 to have multiple intersection points with the extension direction of the water-cooled intermediate frequency induction coil assembly 410, thereby ensuring the heat exchange effect between the auxiliary temperature control assembly 430 and the water-cooled intermediate frequency induction coil assembly 410, so as to improve the response rate of the auxiliary temperature control assembly 430 in adjusting the temperature and ensure the accuracy of the temperature adjustment.

[0052] More specifically, the auxiliary temperature control component 430 is arranged in several groups along the axial direction of the water-cooled intermediate frequency induction coil component 410.

[0053] like Figure 2 As shown in this embodiment, by way of example, the auxiliary temperature control component 430 can be configured in several groups along the axial direction of the horizontal intermediate frequency induction coil component, such as three, four, or five groups. For any group of auxiliary temperature control components 430, the axial section of its second water-cooling pipe 431 passes through at least two turns of the first water-cooling pipe 411. That is, at least two turns of the first water-cooling pipe 411 are also provided between the two turns of the first water-cooling pipe 411 used to arrange the thermally conductive insulation component 420, so that the auxiliary temperature control component 430 can effectively exchange heat with the horizontal intermediate frequency induction coil component.

[0054] And several groups of horizontal intermediate frequency induction coil assembly can adopt independent cooling water circulation system to have different temperature adjustment ability. When the water-cooled intermediate frequency induction coil assembly 410 has temperature uneven phenomenon along its axial direction, for example, the temperature of the middle part of the water-cooled intermediate frequency induction coil assembly 410 is greater than that of the two ends, the temperature of the water-cooled intermediate frequency induction coil assembly 410 can be adjusted by the auxiliary temperature control assembly 430 at different positions in the axial direction to keep the temperature of the water-cooled intermediate frequency induction coil assembly 410 uniform in the axial direction.

[0055] It can be understood that, by arranging the auxiliary temperature control assembly 430 in several groups along the axial direction of the water-cooled intermediate frequency induction coil assembly 410, the temperature of the water-cooled intermediate frequency induction coil assembly 410 can be adjusted by the auxiliary temperature control assembly 430 at different positions in the axial direction, so that the auxiliary temperature control assembly 430 can uniformly heat the graphite box 200.

[0056] Specifically, the device further comprises a heat preservation device 500, which is arranged in the furnace body 100 and outside the heating device 400 and the graphite box 200, and is used for heat preservation of the heating device 400 and the graphite box 200.

[0057] As shown in Figure 1 In this embodiment, the device can also comprise a heat preservation device 500, which can be arranged outside the heating device 400 and the graphite box 200, and can heat preservation of the heating device 400 and the graphite box 200. The heat preservation device 500 can also be arranged in a cylindrical structure, and the two ends can be provided with openable heat preservation covers 510. The device can also comprise a telescopic driving device 600 for driving the heat preservation cover 510 to move telescopically, and the telescopic end of the telescopic driving device 600 can be connected with the heat preservation cover 510 through the furnace cover 120. One of the telescopic driving devices 600 can be arranged on the guide rail, and by sliding the telescopic device on the guide rail, the heat preservation cover 510 can be further opened in the furnace body 100 when the furnace cover 120 is opened, so as to facilitate the taking and placing of titanium alloy parts in the graphite box 200.

[0058] It can be understood that, by arranging the heat preservation device 500, the temperature in the graphite box 200 can be kept from being lost, so as to facilitate the sintering of titanium alloy parts.

[0059] The implementation principle of the device for sintering titanium alloy based on the graphite vacuum sintering furnace provided in the embodiments of the present application is as follows:

[0060] When the titanium alloy piece is sintered, the furnace cover 120, the heat preservation cover 510 and the box cover 210 are opened in sequence to arrange the titanium alloy piece to be sintered in the graphite box 200, and then the box cover 210, the heat preservation cover 510 and the furnace cover 120 are closed in sequence. Then the inside of the graphite box 200 is prepared as a vacuum environment by the vacuumizing device 300, and the graphite box 200 and the titanium alloy piece in the graphite box 200 are sintered by the water-cooled intermediate frequency induction coil assembly 410. When the water-cooled intermediate frequency induction coil assembly 410 heats the graphite box 200, the auxiliary temperature control assembly 430 can exchange heat with the water-cooled intermediate frequency induction coil assembly 410, so that the water-cooled intermediate frequency induction coil assembly 410 can quickly and accurately control the heating temperature of the graphite box 200, so that the temperature rise in the graphite box 200 meets the requirements. When the titanium alloy piece is sintered and cooled, the furnace cover 120, the heat preservation cover 510 and the box cover 210 can be opened in sequence to take out the titanium alloy piece.

[0061] The application can quickly and accurately control the temperature rise of the graphite box 200 when the water-cooled intermediate frequency induction coil assembly 410 heats the graphite box 200 by setting the heating device 400 as at least the water-cooled intermediate frequency induction coil assembly 410, the heat-conducting insulation assembly 420 and the auxiliary temperature control assembly 430, and exchanging heat between the auxiliary temperature control assembly 430 and the water-cooled intermediate frequency induction coil assembly 410 when the water-cooled intermediate frequency induction coil assembly 410 heats the graphite box 200, so that the temperature in the graphite box 200 rises from the first temperature range to the second temperature range, and the first temperature rise in the first temperature range is reduced to the second temperature rise in the second temperature range. The adjustment process quickly responds in place and shortens the response time, and the adjustment is accurate in place and the accuracy of the adjustment process is guaranteed.

[0062] The application also provides a process for sintering a titanium alloy based on a graphite vacuum sintering furnace, which uses any one of the devices for sintering a titanium alloy based on a graphite vacuum sintering furnace provided by the application to sinter a titanium alloy piece.

[0063] The above are preferred embodiments of the application, which do not limit the protection scope of the application, so: any equivalent changes made on the basis of the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. An apparatus for sintering a titanium alloy based on a graphite vacuum sintering furnace, characterized by, The device comprises: a furnace body (100) in which a graphite box (200) is arranged, the graphite box (200) being used for sintering a titanium alloy part in a vacuum environment; a vacuumizing device (300) in communication with the graphite box (200) and used for forming a vacuum environment inside the graphite box (200); a heating device (400) arranged in the furnace body (100), the heating device (400) comprising a water-cooled medium-frequency induction coil assembly (410), a heat-conducting and insulating assembly (420) and an auxiliary temperature control assembly (430), the heat-conducting and insulating assembly (420) connecting and heat-conducting and insulatingly arranging the water-cooled medium-frequency induction coil assembly (410) and the auxiliary temperature control assembly (430), the water-cooled medium-frequency induction coil assembly (410) being arranged outside the graphite box (200) and used for heating the graphite box (200), the auxiliary temperature control assembly (430) being used for exchanging heat with the water-cooled medium-frequency induction coil assembly (410) when the water-cooled medium-frequency induction coil assembly (410) heats the graphite box (200) to assist in adjusting the temperature rise of the graphite box (200) when the water-cooled medium-frequency induction coil assembly (410) heats the graphite box (200), the temperature rise of the graphite box (200) comprising a first temperature rise in a first temperature range and a second temperature rise in a second temperature range, the first temperature range being smaller than the second temperature range, and the first temperature rise being greater than the second temperature rise.

2. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 1, characterized in that, The heat-conducting and insulating assembly (420) comprises a fixing column (421) arranged outside the water-cooled medium-frequency induction coil assembly (410) and a limiting sleeve (422) arranged on the fixing column (421), and the auxiliary temperature control assembly (430) is connected with the limiting sleeve (422).

3. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 2, characterized in that, The limiting sleeve (422) is provided with a limiting clamping groove (4221), and the auxiliary temperature control assembly (430) is arranged around the limiting sleeve (422) and arranged in the limiting clamping groove (4221).

4. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 3, characterized in that, The water-cooled medium-frequency induction coil assembly (410) comprises a first water-cooled pipe (411), and the auxiliary temperature control assembly (430) comprises a second water-cooled pipe (431), and the first water-cooled pipe (411) and the second water-cooled pipe (431) are both made of oxygen-free copper material.

5. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 4, characterized in that, The first water-cooled pipe (411) is square in cross section, the fixing column (421) is threadedly connected to one plane of the first water-cooled pipe (411), the second water-cooled pipe (431) is circular in cross section, and the limiting clamping groove (4221) is shaped to be matched with the second water-cooled pipe (431).

6. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 2, characterized in that, The fixing column (421) and the limiting sleeve (422) are both made of ceramic material.

7. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 1, characterized in that, The water-cooled intermediate frequency induction coil assembly (410) is arranged in a spiral outside the graphite box (200), the heat-conducting insulation assembly (420) is arranged in several groups along the extension direction of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly (410), and the several groups of heat-conducting insulation assemblies (420) are arranged on two turns of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly (410), and the auxiliary temperature control assembly (430) is arranged in an "S" shape between the several groups of heat-conducting insulation assemblies (420) on the two turns of the water-cooled intermediate frequency induction coil assembly (410).

8. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 7, characterized in that, The auxiliary temperature control assembly (430) is arranged in several groups along the axial direction of the water-cooled intermediate frequency induction coil assembly (410).

9. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 1, characterized in that, The device further comprises a heat preservation device (500) arranged in the furnace body (100) and outside the heating device (400) and the graphite box (200), and the heat preservation device (500) is used for heat preservation of the heating device (400) and the graphite box (200).

10. A process for sintering titanium alloys based on graphite vacuum sintering furnaces, characterized by, The process uses the device for sintering titanium alloy based on the graphite vacuum sintering furnace of any one of claims 1-9 to sinter a titanium alloy part.

Images