Automatic furnace door device

Abstract

The invention belongs to the field of aluminum alloy hub casting, and particularly relates to an automatic furnace door device which comprises a low-pressure casting machine holding furnace, a furnace door electric rotating mechanism and a furnace door pneumatic pressing mechanism. The furnace door electric rotating mechanism is fixed to one side of the furnace door through a welding base, and the furnace door pneumatic pressing mechanism is fixed to the other side of the furnace door through a welding bottom plate. The servo motor rotates to sequentially drive the rotating shaft, the furnace door connecting block, the connecting frame and the furnace door to rotate to open and close the furnace door, compressed air enters a rod cavity of the air cylinder through the connector pipeline, and the air cylinder retracts to sequentially pull the push rod, the push rod hinge block and the connecting rod, so that the Z-shaped pressing block rotates around a front side pin hole to be in a horizontal state and presses the connecting frame to press the furnace door. The technical scheme provided by the invention is safe, reliable, low in cost, relatively simple in structure and easy to process and assemble, the working intensity is reduced, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The invention belongs to the field of aluminum alloy wheel hub casting, and particularly relates to an automatic furnace door device. Background Art

[0002] Low-pressure casting uses air pressure to smoothly direct molten aluminum from a holding furnace through a riser tube into the mold, reducing turbulence and air entrapment, resulting in fewer porosity defects in the casting. Maintaining constant pressure promotes sequential solidification of the molten metal from the distal end toward the gate, resulting in effective shrinkage compensation and high microstructure density. The slow and steady filling speed creates a smooth casting surface and reduces subsequent processing. Suitable for complex, thin-walled parts such as wheel hubs, it offers long mold life, low casting costs, ease of automated production, and high efficiency.

[0003] To ensure production continuity and quality reliability during the low-pressure casting process, molten aluminum must be added to the holding furnace at regular intervals and in fixed quantities. Workers use a forklift to transport the ladle containing the molten aluminum to the holding furnace. They then wait for the low-pressure casting mold to be filled and the pressure to be released before manually opening the furnace door. After adding molten aluminum, the door is then manually closed. The entire process takes about a minute, and workers frequently get on and off the forklift to open and close the furnace door, creating not only high workload but also potential safety hazards. Summary of the Invention

[0004] The present invention provides an automatic furnace door device to solve the problems of complex furnace door operation and dangerous environment in the prior art.

[0005] To achieve the above object, the present invention proposes the following technical solutions: An automatic furnace door device comprises a low-pressure casting machine holding furnace, a furnace door electric rotating mechanism and a furnace door pneumatic pressing mechanism; The low-pressure casting machine holding furnace includes a furnace body, a furnace door, and a connecting frame; the furnace door is arranged on the furnace body, and the connecting frame is arranged on the furnace door; the furnace door electric rotation mechanism includes a welding base, a C-shaped bearing frame, a furnace door connecting block, a reducer, and a servo motor; the side of the welding base is connected to the furnace door connecting block via the C-shaped bearing frame, the top of the C-shaped bearing frame is connected to the reducer, and the top of the reducer is provided with a servo motor; The pneumatic clamping mechanism of the furnace door includes a welding base plate, a Z-shaped pressure block, a high rotating shaft block, a low rotating shaft block, a cylinder rod connector, a cylinder and a cylinder rotating shaft block; two high rotating shaft blocks are provided at one end of the welding base plate, and a low rotating shaft block is provided on each side of the high rotating shaft block, and the low rotating shaft is connected to the Z-shaped pressure block through a connecting rod at the top; the connecting rod is connected to one end of the cylinder through the cylinder rod connector, and the other end of the cylinder is connected to the welding base through the cylinder rotating shaft block; The electric rotating mechanism of the furnace door is fixed on one side of the furnace door through a welding base, and the pneumatic pressing mechanism of the furnace door is fixed on the other side of the furnace door through a welding bottom plate.

[0006] Preferably, the side surface of the C-shaped bearing frame is as wide and as high as the cross section of the welding base.

[0007] Preferably, the top surfaces of the upper and lower parts of the C-shaped bearing frame are processed with bearing mounting holes, which are respectively installed with deep groove ball bearings and tapered roller bearings, and bearing stop holes are respectively processed below the bearing mounting holes, and the diameter of the bearing stop holes is smaller than the corresponding bearing outer diameter; The C-shaped bearing frame is connected to the reducer through a deep groove ball bearing and is connected to the furnace door connecting block through a tapered roller bearing.

[0008] Preferably, the furnace door connecting block is a cuboid with a raised cylinder, one corner of the surface of the cuboid with the raised cylinder is a triangular concave platform, and the surface of the triangular concave platform is parallel to the surface of the cuboid; the triangular concave platform is located above the side away from the furnace body.

[0009] Preferably, the electric rotation mechanism of the furnace door further includes a furnace door angle adjustment block, and the furnace door angle adjustment block is arranged on the triangular concave platform of the furnace door connecting block.

[0010] Preferably, the electric rotation mechanism of the furnace door also includes a reducer mounting seat, the furnace door connecting block includes several round steels, an upper flange and a lower flange, the top of the upper flange is connected to the reducer, the bottom of the upper flange is connected to the top of the lower flange through the round steel, and the bottom of the lower flange is connected to the C-shaped bearing frame.

[0011] Preferably, the electric rotation mechanism of the furnace door further includes a protective cover of the servo motor, and the protective cover of the servo motor is arranged on the upper flange of the reducer mounting seat.

[0012] Preferably, the welding base plate is a thick Y-shaped steel plate, and the high-rotation axis block is fixed at the front end of the two symmetrical branches of the Y-shaped structure of the welding base plate.

[0013] Preferably, the pneumatic pressing mechanism of the furnace door further includes a stopper fixed behind the short rotating shaft block of the welding base plate.

[0014] The present invention is beneficial in that: This invention proposes an automatic furnace door device, comprising an electric door rotation mechanism and a pneumatic door clamping mechanism. The servo motor, door connection block, and other components enable electric door opening and closing, while a cylinder, connecting rod, and other components enable pneumatic door tightening, effectively maintaining the door in a tightly closed position. The technical solution provided by this invention is not only safe, reliable, and inexpensive, but also relatively simple in structure, easy to manufacture and assemble, reduces labor intensity, and eliminates safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of an electric rotating mechanism for a furnace door according to the present invention; Figure 2 This is a side view of a pneumatic pressing mechanism for a furnace door according to the present invention; Figure 3 This is a top view of a pneumatic pressing mechanism for a furnace door according to the present invention; Figure 4 This is a schematic diagram of a holding furnace for a low-pressure casting machine according to the present invention; Figure 5 This is a three-dimensional schematic diagram of an electric rotating mechanism for a furnace door according to the present invention; Figure 6 This is a three-dimensional schematic diagram of a pneumatic pressing mechanism for a furnace door according to the present invention; Figure 7 This is a three-dimensional schematic diagram of a locking state of an automatic furnace door device of the present invention; Figure 8 It is a three-dimensional schematic diagram of the unlocking state of an automatic furnace door device of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0017] The following detailed description is an exemplary description and is intended to provide further detailed description of the present invention. Unless otherwise indicated, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. Example

[0018] See also Figure 1 As shown, the present invention provides an automatic furnace door device, which includes a furnace door electric rotating mechanism, a furnace door pneumatic pressing mechanism and a low-pressure casting machine holding furnace.

[0019] The electric rotation mechanism of the furnace door includes a welding base 101, a C-shaped bearing frame 102, a furnace door connecting block 103, a furnace door angle adjustment block 104, a rotating shaft 105, a shaft end cover 106, a washer 107, a reducer mounting seat 108, a reducer 109, a servo motor 110, a deep groove ball bearing 111, a tapered roller bearing 112, a locating pin 113, a flat key 114, a bolt 115, etc.

[0020] The welding base 101 is a steel plate welded workpiece with an I-shaped cross section. One side is cut into an angle to match the inclination angle of the furnace body and is beveled to increase the welding strength. The other side is welded with a welding steel plate with the same width and height as the I-shaped cross section and circular holes on both sides.

[0021] The C-shaped bearing frame 102 is machined from steel. The sides of the C-shaped bearing frame 102 are the same width and height as the I-shaped cross-section of the welded base 101, and are machined with threaded holes. The positions of the threaded holes correspond one-to-one with the circular holes in the welded steel plate on one side of the welded base 101. The sides of the C-shaped bearing frame are fixed to the welded base 101 by bolts. The top surfaces of the upper and lower parts of the C-shaped bearing frame 102 are machined with bearing mounting holes, respectively for mounting deep groove ball bearings 111 and tapered roller bearings 112. Bearing stop holes are machined below each bearing mounting hole. The diameter of each bearing stop hole is smaller than the outer diameter of the corresponding bearing. Four threaded holes are machined on the top surface of the C-shaped bearing frame 102 for mounting the reducer mounting seat 108.

[0022] The furnace door connecting block 103 is made of a rectangular steel material with a smaller protruding cylinder on one side. An axial hole with a keyway is processed in the center of the rectangular body. The center line of the axial hole is perpendicular to the center line of the protruding cylinder and intersects with the center line of the protruding cylinder. The upper half of the protruding cylinder is processed into a thread. The two sides of the rectangular body away from the protruding cylinder are chamfered. A corner of the rectangular surface with the protruding cylinder is processed away to form a triangular concave platform. The surface of the concave platform is parallel to the surface of the rectangular body. A pin hole is processed in the surface of the triangular concave platform for inserting the positioning pin 113 to install the furnace door angle adjustment block 104.

[0023] The furnace door angle adjustment block 104 is a long L-shaped steel piece. A pin hole is processed near the center of one side of the L-shape, and threaded holes are processed at both ends of the other side for screwing in bolts 115 to adjust the angle of the furnace door 302.

[0024] The top center of the rotating shaft 105 is machined with a keyway shaft hole for installing the output shaft of the reducer. The outer diameter of the upper part of the rotating shaft 105 matches the inner hole of the deep groove ball bearing 111, the middle outer diameter matches the keyway shaft hole of the furnace door connecting block 103 and the middle surface is correspondingly machined with a keyway, the lower outer diameter matches the inner diameter of the tapered roller bearing 112, and the bottom center of the rotating shaft 105 is machined with a threaded hole for installing the shaft end cover 106. The outer diameter of the middle part of the rotating shaft 105 is larger than the outer diameters of the upper and lower parts, and a shoulder is formed at the intersection of the middle and lower parts. The shoulder is stuck on the inner ring of the tapered roller bearing 112 to limit the longitudinal downward displacement of the rotating shaft 105.

[0025] The shaft end cover 106 is a circular thin steel plate with a circular hole in the center.

[0026] The washer 107 is an iron ring. The inner diameter of the washer 107 is slightly larger than the inner diameter of the deep groove ball bearing 111, and the wall thickness is equal to or slightly larger than the thickness of the inner ring of the deep groove ball bearing 111. The washer 107 is mounted on the rotating shaft 105, connected to the bottom surface of the inner ring of the deep groove ball bearing 111 at the top, and connected to the shoulder formed by the diameter change of the upper and middle parts of the rotating shaft 105 at the bottom. The reducer mounting seat 108 includes four round steels, an upper flange and a lower flange. The circular hole processed in the center of the upper flange cooperates with the positioning shoulder of the mounting surface of the reducer 109, and four threaded holes are evenly distributed around the central circular hole of the upper flange for fixing the reducer 109; a large circular hole is processed in the center of the lower flange for the rotating shaft 105 to pass through, and small circular holes are processed around the circular hole for passing bolts 115 to connect to the top surface of the C-shaped bearing frame 102. A positioning shoulder is processed in the center of the bottom surface of the lower flange to cooperate with the central circular hole on the top surface of the C-shaped bearing frame 102; four equal-height round steels are evenly distributed in the middle of the bottom surface of the upper flange and the top surface of the lower flange near the outer edge to connect the upper and lower flanges into a whole by welding, and ensure the concentricity requirements of the center holes of the upper and lower flanges.

[0027] The reducer 109 , servo motor 110 , deep groove ball bearing 111 , tapered roller bearing 112 , locating pin 113 , flat key 114 , bolt 115 , etc. are all conventional standard parts.

[0028] In a specific embodiment, the diameter of the bearing stop hole below the mounting hole of the deep groove ball bearing 111 in the upper portion of the C-shaped bearing frame 102 must be smaller than the outer diameter of the bearing while also being larger than the inner diameter of the bearing outer ring to facilitate disassembly of the bearing.

[0029] In a specific embodiment, two threaded holes are machined below the outer ring of the tapered roller bearing 112 in the lower portion of the C-shaped bearing frame 102. When the bolts 115 are screwed in, the outer ring of the bearing can be pushed out, making it easy to disassemble.

[0030] In a specific embodiment, threaded holes may be processed on the upper flange of the reducer mounting base 108 for mounting a protective cover of the servo motor 110 .

[0031] In a specific embodiment, the reducer mounting seat 108 is manufactured by a process method of punching after welding to ensure the concentricity of the center holes of the upper and lower flanges.

[0032] The pneumatic clamping mechanism of the furnace door includes a welding base plate 201, a Z-shaped pressing block 202, a high rotating shaft block 203, a low rotating shaft block 204, a connecting rod 205, a stop block 206, a cylinder tail plate 207, a cylinder rod connecting head 208, a cylinder rotating shaft block 209, a push rod 210, a push rod hinge block 211, a long connecting shaft 212, a short connecting shaft 213, a cylinder 214, a shaft retaining ring 215, a pneumatic solenoid valve, a hose, a joint and bolts.

[0033] The welding base plate 201 is a Y-shaped thick steel plate with a plurality of threaded holes for installing corresponding components, and two sections of reinforcing ribs are welded on one side.

[0034] The Z-shaped pressing block 202 is made of Z-shaped steel and includes an upper part and a lower part. The thickness of the upper part is greater than that of the lower part. The front end of the upper part is processed with a thread for screwing in a bolt 115 to adjust and compensate the gap between the Z-shaped pressing block 202 and the welding pressure plate 201. The lower part is processed with two pin holes, and the three sides of the lower part that are not in contact with the upper part are chamfered with large arcs to avoid interference during rotation.

[0035] A symmetrical ear plate is provided on the top of the high-rotation shaft block 203, and the outer edge of the ear plate is an inverted large arc with a circular hole in the center of the arc. The pin hole on one side of the Z-shaped pressure block 202 is fixed to the circular hole of the ear plate through a short connecting shaft 213, with the center line of the circular hole of the ear plate as the rotation axis; the ear plate part is tilted outward at a certain angle relative to the main body of the high-rotation shaft block 203 to avoid space to avoid interference; the main body of the high-rotation shaft block 203 is relatively high and has a square cross-section. The two opposite sides of the bottom of the main body protrude outward, and circular holes are machined on the protruding parts for inserting bolts 115 to fix the high-rotation shaft block 203 to the front end of the two symmetrical branches of the Y-shaped structure of the welded base plate 201.

[0036] The top of the short rotating shaft block 204 is provided with a symmetrical ear plate, the outer edge of the ear plate is an inverted large arc, the center of the arc is a circular hole, the pin hole on one side of the connecting rod 205 is fixed to the circular hole of the ear plate through a short connecting shaft 213, and the center line of the circular hole of the ear plate is the rotation axis; the main cross-section of the short rotating shaft block 204 is also square, but the height is very short, and the two opposite sides of the bottom of the main body protrude outward, and circular holes are machined on the protruding parts for inserting bolts 115 to fix the short rotating shaft block 204 to the position behind the high rotating shaft block 203 on the welded base plate 201.

[0037] The connecting rod 205 is a long, thick steel plate with inverted semicircular ends. A circular hole is machined through the center of each semicircle. One end has two sides perpendicular to the circular hole cut to a certain thickness, forming a convex structure. The other end has the middle portion perpendicular to the circular hole cut away, forming a concave structure. The thickness of the convex structure is slightly less than the spacing between the concave structures. The graphic structure of the connecting rod 205 is connected to the concave structure of another connecting rod 205 via a long connecting shaft 212. The two connecting rods 205 can rotate freely around the axis of the long connecting shaft 212. The remaining convex portion of each connecting rod 205 is fixed to the circular hole on the ear plate of the short rotating shaft block 204 via a short connecting shaft 213. The remaining concave portion is also fixed to the pin hole on the other side of the Z-shaped pressure block 202 via the short connecting shaft 213.

[0038] The stopper 206 is an L-shaped steel with a certain thickness. A circular hole is processed on the bottom surface for fixing it behind the short rotating shaft block 204 of the welded base plate 201. A small protrusion is processed on the top of the vertical surface. The protrusion limits the backward swing angle of the connecting rod 205.

[0039] The cylinder tail plate 207 is a square steel plate with a perforated ear plate welded in the center of the back. The holes in the four corners of the steel plate are used to insert bolts to install the cylinder 214. The perforated ear plate welded in the center of the back is connected to the circular hole of the ear plate at the top of the cylinder shaft block 209 through a short connecting shaft 213.

[0040] The cylinder rod connector 208 is a Y-shaped structure, with a symmetrical concave ear plate with holes on the top for connecting the push rod 210 and a threaded column on the bottom for screwing into the cylinder rod to connect to the cylinder 214.

[0041] The top of the cylinder shaft block 209 is a symmetrical ear plate, the outer edge of the ear plate is an inverted large arc, and the center of the arc is a circular hole. The ear plate with a hole welded at the center of the back of the cylinder tail plate 207 is fixed to the ear plate circular hole at the top of the cylinder shaft block 209 through a short connecting shaft 213, with the center line of the ear plate circular hole as the rotation axis; the main body of the cylinder shaft block 209 is higher, and the bottom is wider than the top to increase the strength. The two opposite sides of the bottom of the main body protrude outward, and circular holes are machined on the protruding parts for inserting bolts to fix the cylinder shaft block 209 to the rear end of the welded base plate 201.

[0042] The push rod 210 is a relatively thick long steel plate with round holes processed in the center and at both ends.

[0043] Both ends of the push rod hinge block 211 are symmetrical concave ear plates with holes, and the axes of the circular holes of the ear plates at both ends are perpendicular. The ear plates on one side are larger in spacing and are fixed in the middle of each pair of connected connecting rods 205 through a long connecting shaft 212. After connection, the three can rotate freely around the axis of the long connecting shaft. The ear plates on the other side are smaller in spacing and are fixed to the circular holes at both ends of the push rod 210 through a short connecting shaft 213.

[0044] The long connecting shaft 212 and the short connecting shaft 213 are both pin shafts 304 with different lengths and a thin shoulder processed on one end and a retaining ring groove processed on the other end, and are used to connect various rotating elements.

[0045] The shaft retaining spring 215 , pneumatic solenoid valve, hose, connector, bolts, etc. are all standard components.

[0046] In a specific embodiment, the cylinder 214 is a double-acting ultra-thin cylinder with a threaded hole provided on the top of the cylinder rod.

[0047] The low-pressure casting machine heat preservation furnace comprises a furnace body 301, a furnace door 302, a connecting frame 303 and a pin shaft 304, and further comprises a furnace door electric rotation mechanism and a furnace door pneumatic pressing mechanism.

[0048] The furnace body 301 is internally heat-insulated refractory material and externally steel material welded shell, and the furnace door opening surface has a certain slope to facilitate the addition of aluminum liquid and avoid aluminum liquid spatter.

[0049] The furnace door 302 is a container-type steel plate welded long cuboid with one surface, internally filled with refractory heat-insulating material, and externally welded with a steel plate to form a groove, in which a heat-resistant sealing gasket is installed, and four hole ear plates are welded above and below the longitudinal center line of the back of the furnace door 302, and the round holes of the four ear plates are concentric and parallel to the longitudinal center line of the back of the furnace door 302. The connecting frame 303 is a rectangular steel frame with a certain height, and the four edges are thick, and a reinforcing plate is superimposed and welded at the inside center of one short edge, a round hole is opened in the center of the side surface of the reinforcing plate, used for penetrating into the cylindrical protrusion on one side of the furnace door connecting block 103, and then the two are connected into one body by a nut, and round holes are opened in the center of the two long edges of the connecting frame 303, used for penetrating into the pin shaft 304 aligned with the ear plates welded on the back of the furnace door 302, connecting the connecting frame 303 and the furnace door 302, after connection, the furnace door 302 can rotate around the pin shaft 304 to the appropriate position to ensure that the furnace door 302 and the furnace body 301 are closed and fit, and the center area of the connecting frame 303 is further welded with a reinforcing plate to ensure the strength, and two rectangular iron blocks are welded on the side surface of the other short edge of the connecting frame 303, and the upper surface of the iron blocks abuts below the threaded hole at the front end of the Z-shaped pressing block 202 of the pneumatic pressing mechanism when the furnace door is closed and locked, realizing the function of pressing the furnace door 302.

[0050] The pin shaft 304 is a long shaft with a shoulder and a snap spring groove or a split pin hole machined at each end. Embodiment

[0051] The embodiment provides an assembly implementation method, comprising the following steps: Step 101: Install the electric rotating mechanism of the furnace door; first, cut the welding base 101 into an oblique angle and weld it to the side of the inclined furnace door of the furnace body 301. Install the C-shaped bearing frame 102 on the welding base 101 with bolts, install the tapered roller bearing 112 in the bearing mounting hole at the bottom of the C-shaped bearing frame 102, place the furnace door connecting block 103 above the tapered roller bearing 112 in the C-shaped bearing frame 102, and make sure that the triangular concave platform is located above the side away from the furnace body 301. 5 Pass the shaft through the upper hole of the C-shaped bearing frame 102, the center hole of the furnace door connecting block 103 (and align the keyway), and the inner hole of the tapered roller bearing 112 in sequence, and then install the shaft end cover 106 on the bottom surface of the rotating shaft 105 with bolts. Install the washer 107 and deep groove ball bearing 111 on the rotating shaft in sequence, and place the deep groove ball bearing 111 in the upper bearing mounting hole of the C-shaped bearing frame 102. Then install the reducer mounting seat on the top surface of the C-shaped bearing frame 102, and then install the reducer 109 and servo motor 110 in sequence. Step 102: Connect the furnace door 302. First, install the furnace door angle adjustment block onto the triangular concave platform of the furnace door connecting block through the positioning pin 113. Then, insert the short side circular hole of the connecting frame 303 into the raised cylindrical portion of the furnace door connecting block. Then, use a nut to connect the two together. Use the pin 304 to install the furnace door onto the connecting frame 303. Install the shaft retaining ring 215 or cotter pin. Step 103: Install the pneumatic clamping mechanism for the furnace door. First, weld the Y-shaped welding base plate 201 to the other side of the furnace door, with the two symmetrical branches of the Y-shaped facing the furnace door and its center line parallel to the horizontal center line of the furnace door; then, install the high rotation shaft block 203, the low rotation shaft block 204, and the stop block 206 on the two symmetrical branches of the Y-shaped welding base plate 201 in sequence, and use the short connecting shaft 213 to assemble the Z-shaped pressing block 202 and the connecting rod 205 (two on one side) to the high rotation shaft block 203 on the two symmetrical branches of the Y-shaped welding base plate 201. , on the short rotating shaft block 204; fix the cylinder rotating shaft block 209 to the rear end of the welding base plate 201, and use the short connecting shaft 213 and bolts 115 to fix the cylinder tail plate and the cylinder 214 to the cylinder rotating shaft block 209; the cylinder rod connector 208 is installed on the cylinder rod, and the short connecting shaft 213 is used to connect the push rod 210 and the push rod hinge block 211 in turn, and then the long connecting shaft 212 is used to connect the push rod hinge block 211 and the connecting rod 205, and all connecting shafts are installed with shaft retaining rings 215, and finally the solenoid valve, cylinder and air source are connected through joints and pipelines. Example

[0052] This embodiment provides an automatic furnace door device opening and closing action sequence and control method, specifically: Step 201: The solenoid valve is energized and reversed, and compressed air enters the rodless chamber of the cylinder through the joint pipe. The cylinder extends and pushes the push rod, the push rod hinge block, and the connecting rod in sequence, causing the Z-shaped pressure block to rotate about 45 degrees around the front pin hole and away from the connecting frame. Step 202: The servo motor 110 rotates, driving the rotating shaft 105, the furnace door connecting block 103, the connecting frame 303, and the furnace door 302 in sequence to rotate and open the furnace door 302; Step 203: The servo motor 110 rotates in the reverse direction to close the furnace door 302; Step 204: The solenoid valve is energized in the reverse direction and the compressed air enters the rod chamber of the cylinder through the joint pipe. The cylinder retracts and pulls the push rod 210, the push rod hinge block 211, and the connecting rod 205 in sequence, so that the Z-shaped pressing block 202 rotates around the front pin hole to a horizontal state, pressing on the connecting frame 303 to press the furnace door 302. In the compressed state, the angle between the two connecting rods is 180 degrees to form a mechanical dead point, which can better maintain the compressed state.

[0053] In one embodiment, the cylinder uses a piston with a magnetic ring, and a magnetic switch is installed on the surface of the cylinder to monitor the status of the pneumatic pressing mechanism; In a specific embodiment, a striker and a travel switch are installed at the bottom of the rotating shaft 105 to monitor whether the furnace door 302 is opened and closed.

[0054] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. An automatic furnace door device, characterized in that: It includes a low-pressure casting machine holding furnace, an electric furnace door rotating mechanism, and a furnace door pneumatic pressing mechanism; The low-pressure casting machine holding furnace includes a furnace body, a furnace door, and a connecting frame; the furnace door is arranged on the furnace body, and the connecting frame is arranged on the furnace door; the furnace door electric rotation mechanism includes a welding base, a C-shaped bearing frame, a furnace door connecting block, a reducer, and a servo motor; the side of the welding base is connected to the furnace door connecting block via the C-shaped bearing frame, the top of the C-shaped bearing frame is connected to the reducer, and the top of the reducer is provided with a servo motor; The pneumatic clamping mechanism of the furnace door includes a welding base plate, a Z-shaped pressure block, a high rotating shaft block, a low rotating shaft block, a cylinder rod connector, a cylinder and a cylinder rotating shaft block; two high rotating shaft blocks are provided at one end of the welding base plate, and a low rotating shaft block is provided on each side of the high rotating shaft block, and the low rotating shaft is connected to the Z-shaped pressure block through a connecting rod at the top; the connecting rod is connected to one end of the cylinder through the cylinder rod connector, and the other end of the cylinder is connected to the welding base through the cylinder rotating shaft block; The electric rotating mechanism of the furnace door is fixed on one side of the furnace door through a welding base, and the pneumatic pressing mechanism of the furnace door is fixed on the other side of the furnace door through a welding bottom plate.

2. An automatic furnace door device according to claim 1, characterized in that: The side surface of the C-shaped bearing frame is equal in width and height to the cross section of the welding base.

3. An automatic furnace door device according to claim 1, characterized in that: The top surfaces of the upper and lower parts of the C-shaped bearing frame are both machined with bearing mounting holes, for mounting deep groove ball bearings and tapered roller bearings respectively, and bearing stop holes are machined below the bearing mounting holes, the diameter of the bearing stop holes being smaller than the outer diameter of the corresponding bearings; The C-shaped bearing frame is connected to the reducer through a deep groove ball bearing and is connected to the furnace door connecting block through a tapered roller bearing.

4. An automatic furnace door device according to claim 1, characterized in that: The furnace door connecting block is a cuboid with a raised cylinder, one corner of the surface of the cuboid with the raised cylinder is a triangular concave platform, and the surface of the triangular concave platform is parallel to the surface of the cuboid; the triangular concave platform is located above the side away from the furnace body.

5. An automatic furnace door device according to claim 4, characterized in that: The electric rotating mechanism of the furnace door further comprises a furnace door angle adjustment block, which is arranged on the triangular concave platform of the furnace door connecting block.

6. The automatic furnace door device according to claim 1, characterized in that: The electric rotation mechanism of the furnace door also includes a reducer mounting seat, and the furnace door connecting block includes several round steels, an upper flange and a lower flange. The top of the upper flange is connected to the reducer, the bottom of the upper flange is connected to the top of the lower flange through the round steel, and the bottom of the lower flange is connected to the C-shaped bearing frame.

7. An automatic furnace door device according to claim 6, characterized in that: The electric rotating mechanism of the furnace door further comprises a protective cover of the servo motor, and the protective cover of the servo motor is arranged on the upper flange of the speed reducer mounting seat.

8. The automatic furnace door device according to claim 1, characterized in that: The welding base plate is a thick Y-shaped steel plate, and the high-rotation shaft block is fixed at the front ends of the two symmetrical branches of the Y-shaped structure of the welding base plate.

9. The automatic furnace door device according to claim 1, characterized in that: The pneumatic pressing mechanism of the furnace door also includes a stopper fixed behind the short rotating shaft block of the welding bottom plate.

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