A medium frequency induction electric furnace for precision casting machining

Abstract

The present application relates to the technical field of casting, in particular to a kind of medium-frequency induction furnace for precision casting machining, including induction furnace, support control structure, heat insulation seat and heat protection block, the lower end of induction furnace is equipped with heat insulation seat, the lower end of heat insulation seat is fixedly connected with support control structure, the side end of support control structure is fixedly connected with heat protection block, induction furnace can carry out metal heating treatment, help metal hot melt treatment, support control structure can drive induction furnace to carry out position adjustment, so that induction furnace more stably carries out transposition adjustment, induction furnace includes furnace cylinder, protection heat insulating sleeve and guide port, the center front end of furnace cylinder is fixedly connected with guide port, and the top of furnace cylinder is fixedly connected with protection heat insulating sleeve.The present application is medium-frequency induction furnace for precision casting machining, and metal casting production work is realized by the setting of induction furnace and support control structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casting, in particular to a medium-frequency induction furnace for precision casting processing. BACKGROUND

[0002] The medium-frequency induction furnace is a kind of device that converts three-phase power frequency alternating current into direct current after rectification, and then converts the direct current into adjustable current. The alternating current flowing through the capacitor and the induction coil generates high-density magnetic lines of force in the induction coil, and cuts the metal material in the induction coil, generating a large eddy current in the metal material. This eddy current also has some properties of medium-frequency current, that is, the free electrons in the metal itself flowing in the metal body with resistance generate heat.

[0003] As the closest prior art, Chinese Patent No. CN212962773U discloses a medium-frequency induction furnace for casting. The medium-frequency induction furnace for casting comprises a furnace frame and a furnace body. A top frame is arranged on the top edge of the end face of the furnace frame. A threaded column is arranged between the middle part of the top frame and the furnace frame. The upper and lower ends of the threaded column are rotatably connected with the top frame and the furnace frame respectively. The lower end face of the top frame is fixedly connected with the furnace frame through slide columns on both sides. A lifting seat is arranged between the top frame and the furnace frame. A threaded sleeve is embedded in the middle part of the inside of the lifting seat. Slide sleeves are embedded in the both sides of the inside of the lifting seat. The threaded column is threadedly connected with the threaded sleeve, and the slide column is slidably connected with the slide sleeve. The beneficial effects are: the height of the furnace body can be adjusted by the operation of the first motor, which facilitates the placement of metal materials in the furnace body. The furnace body is driven to rotate and tilt by the second motor, which facilitates the pouring of the molten metal liquid in the furnace body. A receiving groove is arranged on the furnace frame to avoid the spilling of the metal liquid when the furnace body is tilted to pour the material, reduce material waste, and improve safety.

[0004] At present, the medium-frequency induction furnace and the device in the above case are mostly used by introducing current through the induction coil to perform heating function and help the hot melting treatment of castings. However, in actual operation, it is often necessary to switch and adjust at different positions to facilitate the guiding and discharging of the material body. The current structure cannot control and adjust more stably, so a device needs to be improved for the above problems. SUMMARY

[0005] In view of the problems in the prior art, the present application provides a medium-frequency induction furnace for precision casting processing.

[0006] The technical scheme adopted by the present application to solve the technical problems is: a medium-frequency induction furnace for precision casting processing, comprising an induction furnace, a support control structure, a heat insulation seat and a heat protection block, the lower end of the induction furnace is provided with a heat insulation seat, the lower end of the heat insulation seat is fixedly connected with a support control structure, and the side end of the support control structure is fixedly connected with a heat protection block.

[0007] The induction furnace can perform metal heating treatment, which helps in the hot melting process of metal.

[0008] The support and control structure can drive the induction furnace to adjust its position, making the induction furnace more stable in changing position.

[0009] The induction furnace includes a furnace cylinder, a protective heat insulation sleeve, and a guide port. The guide port is fixedly connected to the front center of the furnace cylinder, and the protective heat insulation sleeve is fixedly connected to the top of the furnace cylinder.

[0010] Specifically, the induction furnace also includes a docking protective frame, an induction coil, a heat insulation protection seat, and a capacitor. The docking protective frame is fixedly connected to the lower front end of the protective heat insulation sleeve, and a capacitor is located at the lower end of the docking protective frame. The capacitor is electrically connected to the induction coil, which is built into the center of the heat insulation protection seat and arranged around the furnace cylinder. Through the structure of the induction furnace, induction heating can be performed. The capacitor is electrically connected to an external control structure, and the capacitor heats the induction coil. Under the action of current, the induction coil can heat the center position, thereby heating the metal in the furnace cylinder and facilitating the hot melting process. At the same time, the guide port facilitates the conduction of molten steel. The protective heat insulation sleeve protects and fixes the top of the furnace cylinder, and the docking protective frame is fixed at the lower end of the protective heat insulation sleeve. The docking protective frame can limit the connection with the capacitor, thereby maintaining a certain distance between the capacitor and the guide port to prevent heat damage. At the same time, the heat insulation protection seat can perform heat preservation and insulation work to prevent heat loss.

[0011] Specifically, the support and control structure includes a docking frame, a hinged ring frame, a mating collar piece, a first hinged shaft frame, a mounting limiting plate, a second hinged shaft frame, and a hydraulic column. The rear end of the mating collar piece is fixedly connected to the docking frame. The side end of the docking frame is hinged to the hinged ring frame. The lower end of the hinged ring frame is mounted on the hydraulic column. The bottom of the hydraulic column is hinged to the second hinged shaft frame. The side end of the second hinged shaft frame is fixedly connected to the mounting limiting plate. The upper end of the mounting limiting plate is hinged to the first hinged shaft frame. The mounting limiting plate is hinged to one end of the mating collar piece via the first hinged shaft frame.

[0012] Specific, the support control structure further includes limiting slide rod, movement cooperation block, hinged main frame, cooperation support ring, fit control frame, hydraulic guide rod, limiting protection seat and limiting bottom plate frame, the side end of the installation limiting plate is fixedly connected with limiting protection seat, the hydraulic guide rod is installed on the limiting protection seat, the fit control frame is connected with the hydraulic guide rod in an extending and retracting mode, the heat preservation protection block is fixedly connected with the fit control frame, the fit control frame is fixedly connected with the cooperation support ring, the hinged main frame is hinged on the cooperation support ring, the movement cooperation block is hinged on the hinged main frame, the movement cooperation block is slidably connected on the limiting slide rod, the limiting slide rod is fixedly connected with the limiting bottom plate frame, through the structure of the support control structure, the adjustment work is facilitated, the induction furnace is connected with the rotation of the cooperation sleeve ring piece, the hydraulic column can be adjusted, the hydraulic column is started, the extending and retracting adjustment can be carried out, the bottom is rotated through the second hinged shaft frame, the top is hinged with the butt joint frame, so that the butt joint frame is stressed, the cooperation sleeve ring piece is driven to move, the cooperation sleeve ring piece can be turned over under the limiting of the first hinged shaft frame, so that the position of the induction furnace is adjusted, meanwhile, the position of the heat preservation protection block and the fit control frame can be adjusted, the position of the heat preservation protection block and the fit control frame is changed through the extension and retraction of the hydraulic guide rod, so that the interference is reduced, when the equipment is heated, the heat preservation protection block and the induction furnace can be as close as possible, the heat loss is reduced, meanwhile, the bottom of the heat preservation protection block is supported through the cooperation support ring, the movement adjustment can be carried out in cooperation when the heat preservation protection block moves, so that the stability of the fit control frame and the heat preservation protection block is improved.

[0013] Specific, the cooperation sleeve ring piece is limitedly sleeved with the furnace cylinder and the protective heat insulation sleeve, the hydraulic column can drive the butt joint frame and the cooperation sleeve ring piece to rotate around the first hinged shaft frame through extension and retraction.

[0014] Specific, the movement of the cooperation sleeve ring piece drives the furnace cylinder and the protective heat insulation sleeve to move, and the cooperation sleeve ring piece is fixed with the furnace cylinder and the protective heat insulation sleeve through a pin.

[0015] Specific, the limiting protection seat controls the position of the fit control frame and the heat preservation protection block through the hydraulic guide rod, so that the gap distance between the heat preservation protection block and the induction furnace is changed.

[0016] Specific, the induction furnace is installed with a temperature sensor, the temperature sensor is limitedly arranged through the installation positioning plate, the installation positioning plate is fixedly connected with the upper end of the installation limiting plate, the side end of the temperature sensor is electrically connected with a controller, and the controller is electrically connected with the hydraulic column and the hydraulic guide rod.

[0017] The beneficial effects of the present application are as follows:

[0018] One, the application can perform induction heating function through the structural arrangement of the induction furnace, the capacitor is electrically connected with the external control structure, the induction coil is heated by the capacitor, and the induction coil can heat the center position under the action of the current, so that the metal in the furnace cylinder is heated, the hot melting treatment work is facilitated, the guide port facilitates the conduction of molten steel, the protective heat shield protects and fixes the top of the furnace cylinder, the butt joint protection frame is fixed at the lower end of the protective heat shield, the butt joint protection frame can be limitedly connected with the capacitor, so that the capacitor maintains a certain distance from the guide port, prevents the phenomenon of heat damage, and the setting of the heat insulation protection seat can perform heat preservation and heat insulation work and prevent heat loss.

[0019] Two, the application facilitates adjustment work through the structural arrangement of the supporting regulation structure, the induction furnace is connected with the rotation of the matching sleeve ring piece, the hydraulic column can be adjusted, the hydraulic column can be adjusted by starting, the bottom is rotated by the second hinged shaft frame, the top is hinged with the butt joint connecting frame, so that the butt joint connecting frame is stressed, the matching sleeve ring piece is driven to move, the matching sleeve ring piece can be turned over under the limitation of the first hinged shaft frame, so as to adjust the position of the induction furnace, the position of the heat preservation protection block and the abutting regulation frame can be adjusted, the heat preservation protection block and the abutting regulation frame are changed by the extension of the hydraulic guide rod, so as to reduce interference, when the equipment is heated, the heat preservation protection block and the induction furnace can be as close as possible, heat loss is reduced, the bottom of the heat preservation protection block is supported by the matching support ring, the heat preservation protection block can be moved and adjusted, so as to improve the stability of the abutting regulation frame and the heat preservation protection block. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be further described below in combination with the drawings and examples.

[0021] Figure 1 It is a front perspective view of the main body in the application;

[0022] Figure 2 It is a side perspective view of the main body in the application;

[0023] Figure 3 It is a rear perspective view of the main body in the application;

[0024] Figure 4 It is a front perspective view of the induction furnace in the application;

[0025] Figure 5 It is a split view of the induction furnace in the application;

[0026] Figure 6It is a front perspective view of the supporting and regulating structure in the application;

[0027] Figure 7 It is a split view of the supporting and regulating structure in the application;

[0028] Figure 8 It is a front perspective view of the second embodiment of the main body in the application.

[0029] In the figure: 1-induction furnace, 2-supporting and regulating structure, 3-heat preservation and insulation seat, 4-heat preservation and protection block, 5-furnace cylinder, 6-protection and insulation sleeve, 7-guide opening, 8-butting protection frame, 9-induction coil, 10-insulation protection seat, 11-capacitor, 12-butting connecting frame, 13-hinged ring frame, 14-matching sleeve ring piece, 15-first hinged shaft frame, 16-installation limiting plate, 17-second hinged shaft frame, 18-hydraulic column, 19-limiting sliding rod, 20-movement matching block, 21-hinged main frame, 22-matching bearing ring, 23-fitting regulating frame, 24-hydraulic guide rod, 25-limiting protection seat, 26-limiting bottom plate frame, 27-temperature sensor, 28-installation positioning plate, 29-controller. DETAILED DESCRIPTION

[0030] In order to make the person skilled in the art better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0031] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0032] The present application will be further described below in combination with the drawings. Embodiment 1

[0033] As Figures 1-7As shown, the present application is a kind of precision casting processing with intermediate frequency induction furnace, including induction furnace 1, support control structure 2, heat insulation seat 3 and heat protection block 4, the lower end of induction furnace 1 is provided with heat insulation seat 3, the lower end of heat insulation seat 3 is fixedly connected with support control structure 2, the side end of support control structure 2 is fixedly connected with heat protection block 4;

[0034] Induction furnace 1 can be used for metal heating treatment, which helps metal hot melting treatment;

[0035] Support control structure 2 can drive induction furnace 1 to adjust the position, so that induction furnace 1 can be adjusted more stably;

[0036] As shown, Figure 4 Induction furnace 1 includes furnace cylinder 5, protective heat insulation sleeve 6 and guide port 7, the center of furnace cylinder 5 is fixedly connected with guide port 7, and the top of furnace cylinder 5 is fixedly connected with protective heat insulation sleeve 6.

[0037] As shown, Figure 5 Induction furnace 1 further includes butt joint protection frame 8, induction coil 9, heat insulation protection seat 10 and capacitor 11, butt joint protection frame 8 is fixedly connected to the lower part of the front end of protective heat insulation sleeve 6, capacitor 11 is arranged at the lower end of butt joint protection frame 8, capacitor 11 is electrically connected with induction coil 9, induction coil 9 is arranged at the center position of heat insulation protection seat 10, and induction coil 9 is arranged around furnace cylinder 5, metal is placed in the interior of furnace cylinder 5, at this time capacitor 11 works, and current is conducted to the interior of induction coil 9, metal in furnace cylinder 5 is heated by induction coil 9, and the arrangement of protective heat insulation sleeve 6 can protect, the arrangement of heat insulation protection seat 10 helps heat preservation, so that metal can be continuously heated.

[0038] As shown, Figure 6 Support control structure 2 includes butt joint connecting frame 12, hinged ring frame 13, matching sleeve ring piece 14, first hinged shaft frame 15, installation limiting plate 16, second hinged shaft frame 17 and hydraulic column 18, butt joint connecting frame 12 is fixedly connected to the rear end of matching sleeve ring piece 14, hinged ring frame 13 is hinged to the side end of butt joint connecting frame 12, hydraulic column 18 is arranged at the lower end of hinged ring frame 13, second hinged shaft frame 17 is hinged to the bottom of hydraulic column 18, installation limiting plate 16 is fixedly connected to the side end of second hinged shaft frame 17, first hinged shaft frame 15 is hinged to the upper end of installation limiting plate 16, and installation limiting plate 16 is hingedly arranged at one end of matching sleeve ring piece 14 through first hinged shaft frame 15.

[0039] As shown, Figure 7As shown, the support regulating structure 2 further comprises a limiting slide rod 19, a movement matching block 20, a hinged main frame 21, a matching support ring 22, a fitting regulating frame 23, a hydraulic guide rod 24, a limiting protection seat 25 and a limiting bottom plate frame 26. The side end of the limiting plate 16 is fixedly connected with the limiting protection seat 25, the limiting protection seat 25 is provided with the hydraulic guide rod 24, the hydraulic guide rod 24 is telescopically connected with the fitting regulating frame 23, the heat preservation protection block 4 is fixedly connected with the fitting regulating frame 23, the lower end of the heat preservation protection block 4 is fixedly connected with the matching support ring 22, the matching support ring 22 is hingedly connected with the hinged main frame 21, the hinged main frame 21 is hingedly connected with the movement matching block 20, the movement matching block 20 is slidingly connected on the limiting slide rod 19, the limiting slide rod 19 is fixedly connected with the limiting bottom plate frame 26. The work is controlled by the hydraulic guide rod 24, the extension and retraction of the hydraulic guide rod 24 can drive the heat preservation protection block 4 and the fitting regulating frame 23 to move, so that the heat preservation protection block 4 is separated from the induction furnace 1, and the matching support ring 22 at the lower end of the heat preservation protection block 4 moves in cooperation. The matching support ring 22 can drive the movement matching block 20 to move through the hinged main frame 21, the movement matching block 20 is limited in the limiting bottom plate frame 26 through the limiting slide rod 19, and can be adjusted by sliding on the limiting slide rod 19. Since the movement matching block 20, the hinged main frame 21 and the matching support ring 22 are hingedly arranged, they can relatively rotate, so as to cooperate with the matching support ring 22 to move longitudinally, so as to adjust the position of the heat preservation protection block 4, and to adjust and process as required. When the induction furnace 1 needs to be adjusted and operated, the adjustment is made to prevent movement interference. When the induction furnace 1 is heated, the heat preservation treatment work can be carried out.

[0040] The matching sleeve ring piece 14 is limitingly sleeved with the furnace cylinder 5 and the protection heat insulation sleeve 6, and the hydraulic column 18 can drive the butt joint connecting frame 12 and the matching sleeve ring piece 14 to rotate around the first hinged shaft frame 15 through extension and retraction.

[0041] The movement of the matching sleeve ring piece 14 drives the furnace cylinder 5 and the protection heat insulation sleeve 6 to move and adjust, and the matching sleeve ring piece 14 is fixed with the furnace cylinder 5 and the protection heat insulation sleeve 6 through a pin, so as to improve the connection tightness and prevent falling off.

[0042] The limiting protection seat 25 controls the position of the fitting regulating frame 23 and the heat preservation protection block 4 through the hydraulic guide rod 24, so as to change the gap distance between the heat preservation protection block 4 and the induction furnace 1, so as to adjust and process as required. The heat preservation work is carried out during heating, and movement interference is prevented when the induction furnace 1 moves.

[0043] The working principle of the embodiment 1 is that, in use, the user assembles and installs the induction furnace 1 and the supporting and regulating structure 2 as a whole, places the metal in the inside of the furnace cylinder 5, at this time, the capacitor 11 works to conduct the current to the inside of the induction coil 9, the metal in the furnace cylinder 5 is heated by the induction coil 9, the protective heat shield 6 is arranged to protect, the heat insulation protection seat 10 is arranged to help heat preservation, so that the metal is continuously heated, when the heating is completed, the user can change the position of the induction furnace 1 by controlling, the user first controls the hydraulic guide rod 24 to work, the extension and retraction of the hydraulic guide rod 24 can drive the heat preservation protection block 4 and the abutting regulating frame 23 to move, so that the heat preservation protection block 4 is separated from the induction furnace 1, at the same time, the lower end of the heat preservation protection block 4 cooperates with the cooperating supporting ring 22 to move, the cooperating supporting ring 22 can pull the moving cooperation block 20 to move through the hinged main frame 21, the moving cooperation block 20 is limited in the inside of the limiting bottom plate frame 26 through the limiting slide rod 19, can slide and adjust on the limiting slide rod 19, because the moving cooperation block 20, the hinged main frame 21 and the cooperating supporting ring 22 are arranged in a hinged manner, can relatively rotate, so as to cooperate with the cooperating supporting ring 22 to move in the longitudinal position, so as to adjust the position of the heat preservation protection block 4, then the hydraulic column 18 is controlled, the hydraulic column 18 can be adjusted in extension and retraction, the abutting connecting frame 12 and the cooperating sleeve ring piece 14 are acted on by the hinged ring frame 13, the cooperating sleeve ring piece 14 is limited and fixed with the induction furnace 1, the cooperating sleeve ring piece 14 can be adjusted in overturning through the first hinged shaft frame 15, under the action of the hydraulic column 18, the induction furnace 1 and the cooperating sleeve ring piece 14 are overturned through the first hinged shaft frame 15, so that the metal liquid is guided and discharged through the guide port 7, and the work is completed. Embodiment 2

[0044] On the basis of the embodiment 1, as shown in Figure 8 The temperature sensor 27 is installed on the induction furnace 1, the temperature sensor 27 is limited and arranged through the installation limiting plate 28, the installation limiting plate 28 is fixedly connected with the upper end of the installation limiting plate 16, the side end of the temperature sensor 27 is electrically connected with the controller 29, the controller 29 is electrically connected with the hydraulic column 18 and the hydraulic guide rod 24.

[0045] In the implementation of the embodiment, the temperature sensor 27 is used for temperature sensing of the induction furnace 1, and a non-contact temperature measurement is adopted, at the same time, the temperature sensor 27 needs to be protected to prevent damage caused by heating, the temperature sensor 27 is fixedly installed through the installation limiting plate 28, at the same time, the temperature sensor 27 is electrically connected with the controller 29, the temperature information of the induction furnace 1 can be received in real time through the controller 29, at the same time, the controller 29 can control the work of the hydraulic column 18 and the hydraulic guide rod 24, so as to facilitate the overall control purpose.

[0046] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A medium-frequency induction furnace for precision casting, characterized in that: Including induction electric stove (1), support control structure (2), heat preservation heat insulation seat (3) and heat preservation protection block (4), the lower end of the induction electric stove (1) is provided with heat preservation heat insulation seat (3), the lower end of the heat preservation heat insulation seat (3) is fixedly connected with support control structure (2), and the side end of the support control structure (2) is fixedly connected with heat preservation protection block (4); The induction electric stove (1) can be used for metal heating treatment, and help metal hot melting treatment; The support control structure (2) can drive the induction electric stove (1) to adjust the position, so that the induction electric stove (1) is more stable in position adjustment; The support control structure (2) includes installation limiting plate (16), limiting sliding rod (19), movement matching block (20), hinged main frame (21), matching support ring (22), fitting control frame (23), hydraulic guide rod (24), limiting protection seat (25) and limiting bottom plate frame (26), the side end of the installation limiting plate (16) is fixedly connected with the limiting protection seat (25), the limiting protection seat (25) is provided with the hydraulic guide rod (24), the hydraulic guide rod (24) is telescopically connected with the fitting control frame (23), the heat preservation protection block (4) is fixedly connected with the fitting control frame (23), the lower end of the heat preservation protection block (4) is fixedly connected with the matching support ring (22), the matching support ring (22) is hingedly connected with the hinged main frame (21), the hinged main frame (21) is hingedly connected with the movement matching block (20), the movement matching block (20) is slidably connected on the limiting sliding rod (19), and the limiting sliding rod (19) is fixedly connected with the limiting bottom plate frame (26); The induction electric stove (1) includes furnace cylinder (5), protection heat insulation sleeve (6) and guide port (7), the center front end of the furnace cylinder (5) is fixedly connected with the guide port (7), and the top of the furnace cylinder (5) is fixedly connected with the protection heat insulation sleeve (6).

2. The medium frequency induction electric furnace for processing precision castings according to claim 1, characterized in that: The induction electric stove (1) further includes butt joint protection frame (8), induction coil (9), heat insulation protection seat (10) and capacitor (11), the front end of the protection heat insulation sleeve (6) is fixedly connected with the butt joint protection frame (8), the lower end of the butt joint protection frame (8) is provided with the capacitor (11), the capacitor (11) is electrically connected with the induction coil (9), the induction coil (9) is built in the center position of the heat insulation protection seat (10), and the induction coil (9) and the furnace cylinder (5) are arranged around.

3. The medium frequency induction electric furnace for processing precision castings according to claim 2, characterized in that: Said support regulation structure (2) includes butt joint link (12), hinged ring frame (13), matched sleeve ring piece (14), first hinged shaft frame (15), installation limiting plate (16), second hinged shaft frame (17) and hydraulic column (18), the rear end of matched sleeve ring piece (14) is fixedly connected with butt joint link (12), the side end of butt joint link (12) is hinged with hinged ring frame (13), the lower end of hinged ring frame (13) is provided with hydraulic column (18), the bottom of hydraulic column (18) is hinged with second hinged shaft frame (17), the side end of second hinged shaft frame (17) is fixedly connected with installation limiting plate (16), the upper end of installation limiting plate (16) is hinged with first hinged shaft frame (15), and one end of matched sleeve ring piece (14) is hinged with installation limiting plate (16) through first hinged shaft frame (15).

4. The medium frequency induction electric furnace for processing precision castings according to claim 3, characterized in that: Said matched sleeve ring piece (14) is limitingly sleeved with furnace shell (5) and protective heat insulation sleeve (6), and the hydraulic column (18) can drive butt joint link (12) and matched sleeve ring piece (14) to rotate around first hinged shaft frame (15) through extension and contraction.

5. The medium frequency induction electric furnace for processing precision castings according to claim 4, characterized in that: The movement of matched sleeve ring piece (14) drives furnace shell (5) and protective heat insulation sleeve (6) to move and adjust, and matched sleeve ring piece (14) is fixed with furnace shell (5) and protective heat insulation sleeve (6) through a pin.

6. The medium frequency induction electric furnace for processing precision castings according to claim 5, characterized in that: Said limiting protection seat (25) controls the position of abutting regulation frame (23) and heat preservation protection block (4) through hydraulic guide rod (24), so as to change the gap distance between heat preservation protection block (4) and induction electric furnace (1).

7. The medium frequency induction furnace for processing of precision castings according to claim 6, characterized in that: Said induction electric furnace (1) is provided with temperature sensor (27), the temperature sensor (27) is limitingly arranged through installation positioning plate (28), the installation positioning plate (28) is fixedly connected with the upper end of installation limiting plate (16), and the side end of temperature sensor (27) is electrically connected with controller (29), and the controller (29) is electrically connected with hydraulic column (18) and hydraulic guide rod (24).

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