Vacuum Induction Furnace Automatic Pouring Device and Its Control Method

Abstract

The present invention relates to an automatic casting device for a vacuum induction furnace and a control method thereof, comprising: a longitudinal driving and conveying device arranged along a preset axis of the automatic casting device for the vacuum induction furnace; a transverse driving and conveying device arranged in a direction perpendicular to the longitudinal driving and conveying device; a crucible mechanism is controlled by a main control system to perform casting on a plane formed by the longitudinal driving and conveying device and the transverse driving and conveying device; by adopting the technical method that the crucible mechanism is controlled by the main control system to perform casting on the plane formed by the longitudinal driving and conveying device and the transverse driving and conveying device, it is possible to realize automatic casting, and at the same time, it is also possible to formulate a casting path according to a mold layout diagram and automatically complete casting; reduce the operation experience and requirements of workers, reduce the labor intensity of workers and the equipment adjustment time, and improve the production efficiency and automation level.

Description

Technical Field

[0001] The embodiments of the present invention relate to a casting device and a control method, and more particularly to an automatic casting device for a vacuum induction furnace and a control method thereof. Background Art

[0002] In the smelting process of a large-tonnage vacuum induction furnace, the weight of a single master alloy is relatively small, and a group of castings will be composed of many molds. It is necessary to complete the casting of several tons of molten steel in the shortest time and in the fastest way. The existing casting device of the vacuum induction furnace adopts hydraulic or motor drive. After the mold is placed, the worker manually controls the casting by observing the casting process through the observation window. In addition, the quality of the cast product is also greatly affected by the operation of the personnel. At the same time, it is very troublesome for the workers to complete the operation of molds of different specifications in a group of castings. It requires higher requirements for on-site operators and has low production efficiency. How to provide an automatic control master alloy casting device that can adapt to the casting of molds of different specifications, ensure that the workers' operating experience and requirements are reduced during the casting process, reduce the labor intensity of the workers and the equipment adjustment time, and improve production efficiency and automation level has become an important technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide an automatic casting device for a vacuum induction furnace, which can automatically control the master alloy casting device and adapt to the casting of molds of different specifications, thereby ensuring that the workers' operating experience and requirements are reduced during the casting process, reducing the workers' labor intensity and equipment adjustment time, and improving production efficiency and automation level.

[0004] In order to achieve the above object, the embodiment of the present invention designs a vacuum induction furnace automatic casting device, which is characterized by comprising:

[0005] A longitudinal driving and conveying device is arranged along a preset axis of the vacuum induction furnace automatic casting device;

[0006] A transverse driving conveying device, which is arranged along the vertical direction of the longitudinal driving conveying device;

[0007] The crucible mechanism is controlled by a main control system to perform casting on a plane formed by the longitudinal driving and conveying device and the transverse driving and conveying device.

[0008] Furthermore, the longitudinal drive conveying device comprises:

[0009] A motor drive device is provided at one end of the longitudinal drive conveyor; a chain drive is provided on the driving transmission shaft of the motor drive device; a plurality of fasteners are fixed above the chain, and the fasteners are snapped into the hanging grooves provided below the mold car device to drive the mold car device to move along the preset axis direction of the longitudinal drive conveyor;

[0010] The chain is wound around the support base.

[0011] Furthermore, the motor drive device includes:

[0012] A motor, which is fixed on one side of the motor drive device;

[0013] A speed reducer, which is shaft-connected to the speed reducer at one end of the motor;

[0014] A driving transmission shaft, which is connected to the driving transmission shaft through a coupling on the output shaft of the speed reducer; bearing seats are movably connected to both ends of the driving transmission shaft;

[0015] A driving transmission gear, which is fixed on the driving transmission shaft; a chain is connected to a driven transmission gear on a driven transmission shaft at the other end of the longitudinal drive conveyor on the driving transmission gear.

[0016] Furthermore, the mold car device includes:

[0017] Chain boxes are respectively provided above and below the support base, and a chain is provided in the chain boxes. The chain forms an annular chain drive between the driving transmission shaft and the driven transmission shaft;

[0018] Melting chamber sheave tracks are fixed above the support base in parallel on one side of the chain;

[0019] Flat wheel tracks are fixed on both sides of the melting chamber sheave tracks above the support base on the other side of the chain;

[0020] V-shaped sheaves are clamped on the melting chamber sheave tracks;

[0021] Flat wheels are arranged on the flat wheel tracks;

[0022] Mold car rollers are respectively arranged between the V-shaped sheaves and the flat wheels;

[0023] A mold car is fixed above the mold car rollers;

[0024] Load cells, a plurality of the load cells are fixedly arranged at the upper end between the die cart and the die cart rollers;

[0025] Die plate, the die plate is placed on the load cells;

[0026] Dies, a plurality of the dies are fixed on the die cart.

[0027] Furthermore, the transverse driving and conveying device includes:

[0028] Driving linear actuator, the driving linear actuator drives the crucible mechanism to reciprocate in the direction of the preset axis of the transverse driving and conveying device; one end of the driving linear actuator is fixed; the other end of the driving linear actuator is movably connected to the crucible mechanism; a dust cover is fixed above the driving linear actuator.

[0029] Furthermore, the crucible mechanism includes:

[0030] Bottom plate track, the bottom plate track is fixed at the bottom of the crucible mechanism; a slider is movably connected to the bottom plate track, and a slide plate is fixed above the slider; one end of the slide plate is fixedly connected to one end of the driving linear actuator; the slide plate moves along the preset axis of the transverse driving and conveying device under the drive of the driving linear actuator;

[0031] Crucible support mechanism, the crucible support mechanism is fixed on the slide plate, one end of the crucible support mechanism is movably connected to both ends of the melting crucible through a rocker arm, and the other end of the crucible support mechanism is fixed on the slide plate;

[0032] Runner, on one side of the top end of the crucible support mechanism, the runner is fixed near the die cart side; the runner is arranged perpendicular to the preset axis of the longitudinal driving and conveying device; the die cart is driven by the longitudinal driving and conveying device to be below the runner;

[0033] Melting crucible, the melting crucible is fixed between both sides of the rocker arm, a rotating shaft is movably connected to the rocker arm and on the crucible support mechanism; the other end of the melting crucible is movably connected to a hydraulic mechanism, and the melting crucible drives the rocker arm to rotate around the rotating shaft through the hydraulic mechanism, driving the melting crucible to tilt for casting.

[0034] Furthermore, the motor is a servo motor or a stepper motor.

[0035] Furthermore, the driving linear actuator is a hydraulic cylinder or a servo cylinder;

[0036] The described main control system includes:

[0037] A PLC, which serves as the controller of the main control system;

[0038] A drive controller, which is electrically connected to the PLC, and the PLC is communicatively connected to a human-machine interface;

[0039] A weighing sensor, which is electrically connected to the PLC.

[0040] In the present invention, a control method for an automatic casting device of a vacuum induction furnace is also provided, including the following steps:

[0041] Step S10: Parameter setting. Input the steel grade for smelting, steel grade density, melting temperature, initial weight of the mold car, dynamically collected weight of the mold car during casting, input the arrangement position of the molds, mold shape, number of molds, input the origin (x0, y0) of the mold plate system, rotational speed of the motor, rotation direction of the motor, stroke of the lateral drive conveyor, direction of the lateral drive conveyor, stroke of the longitudinal drive conveyor, and direction of the longitudinal drive conveyor in the human-machine interface, and then enter step S20;

[0042] Step S20: Calculate the weight of the molten steel. xi molds are arranged in the preset direction of the longitudinal drive conveyor and Yj molds are arranged in the preset direction of the longitudinal drive conveyor in a regular arrangement; input the mold layout diagram in the human-machine interface, and input the inner circle radius and various mold dimensions of each mold, and calculate the weight of the molten steel filled in each mold cavity, and then enter step S30;

[0043] Step S30: Determine the casting coordinates. The drive controller drives the longitudinal drive conveyor to drive the mold plate to the system origin (x0, y0), and confirm the casting point coordinates (xa, ya) of each mold in the mold layout diagram on the human-machine interface; formulate a casting path according to the mold layout diagram, set the casting end coordinates (xn, ym), and input the total weight M of the molten steel in the melting crucible in the human-machine interface 8; enter step S40;

[0044] Step S40: Determine the weight of molten steel required for a single mold. Calculate the weight of molten steel required for a single mold ms from the total weight M of the molten steel in the melting crucible in step S30 according to the mold layout diagram, and then enter step S50;

[0045] Step S50: Casting. The drive controller drives the longitudinal drive conveyor to drive the mold plate to perform casting according to the mold layout diagram. During the casting process, the dynamic value of the increased weight of the mold car plate is collected by the weighing sensor. When the dynamic value of the increased weight of the mold car plate is equal to the weight of molten steel ms required for the current mold, the casting of the current mold is completed. According to the set casting path, the drive controller drives the longitudinal drive conveyor and the transverse drive conveyor to move to the next casting point on the set casting path; continue casting until the casting is completed, and then loop back to step S40; if a casting error occurs, go to step S60; if the drive controller drives the longitudinal drive conveyor to drive the mold plate to the casting end coordinates (xn, ym); and after the casting is completed; the value of the weighing sensor is still greater than zero; then the weight of the cast molten steel is excessive, and go to step S70;

[0046] Step S60: Automatically end casting. The drive conveyor drives the mold plate to return to the origin (x0, y0) of the mold plate system;

[0047] Step S70: Return to the origin to pour out the excess molten steel; the drive controller drives the longitudinal drive conveyor to drive the mold plate to the origin (x0, y0) of the mold plate system, pour back the excess molten steel, and zero the weighing sensor.

[0048] Compared with the prior art, the implementation mode of the present invention adopts a technical method in which the crucible mechanism is controlled by the main control system to perform casting on the plane formed by the longitudinal drive conveyor and the transverse drive conveyor. It can realize automatic casting while also being able to formulate the casting path according to the mold layout diagram and automatically complete the casting. It solves the problem that the existing casting device of the vacuum induction furnace uses a hydraulic or motor drive method. After the mold is placed, the worker observes the casting process through the observation window and manually controls the casting. Moreover, the quality of the cast product is greatly affected by the operation of the personnel. At the same time, it is very troublesome for workers to operate different specifications of molds in a group of castings, requiring higher requirements for on-site operators, resulting in low production efficiency. How to provide an automatic control master alloy casting device that adapts to the casting of different specifications of molds, ensures that the operation experience and requirements of workers are reduced during the casting process, reduces the labor intensity of workers and the equipment adjustment time, and improves the production efficiency and automation level has become an important technical problem that needs to be solved urgently by those skilled in the art. Description of the Drawings

[0049] Figure 1 It is a schematic structural diagram in the main view direction of the present invention;

[0050] Figure 2 It is a schematic structural diagram in the A-A direction;

[0051] Figure 3 It is a schematic diagram in the side view direction of the present invention;

[0052] Figure 4 Structural schematic diagram in the B-B direction of the present invention;

[0053] Figure 5 Control schematic diagram of the control system of the present invention;

[0054] Figure 6 Schematic diagram of the walking path of the first embodiment of the present invention;

[0055] Figure 7 Schematic diagram of the walking path of the second embodiment of the present invention;

[0056] Figure 8 Schematic diagram of the walking path of the third embodiment of the present invention;

[0057] Figure 9 Flowchart of the control method of the second embodiment of the present invention. Detailed implementation manners

[0058] To make the objectives, technical solutions and advantages of the present invention clearer, the following will elaborate on each embodiment of the present invention with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are provided to help readers better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in each claim of the present application can still be achieved.

[0059] The first embodiment of the present invention relates to an automatic casting device for a vacuum induction furnace, as Figure 1 , Figure 2 , Figure 3 , Figure 4 shown, and includes:

[0060] In this embodiment, a longitudinal driving and conveying device is arranged along the preset axis of the automatic casting device for the vacuum induction furnace; the preset axis includes axes in any plane, and in this embodiment, the preset axis of the automatic casting device for the vacuum induction furnace is the center line of the Y-axis.

[0061] By the same token, a transverse driving and conveying device 200 is arranged in the vertical direction of the longitudinal driving and conveying device 100; in this embodiment, the preset axis of the automatic casting device for the vacuum induction furnace is the center line of the X-axis.

[0062] The crucible mechanism 300 is controlled by the main control system 400 to perform casting on the plane formed by the longitudinal drive conveyor device 100 and the transverse drive conveyor device 200. In this embodiment, the technical method of controlling the crucible mechanism 300 by the main control system 400 to perform casting on the plane formed by the longitudinal drive conveyor device 100 and the transverse drive conveyor device 200 is adopted, which can realize automatic casting, solve the problem that the casting device of the existing vacuum induction furnace adopts a hydraulic or motor drive mode. After the mold is placed, the worker observes the casting process through the observation window and manually controls the casting. Moreover, the quality of the cast product is greatly affected by the operation of the personnel. At the same time, it is very troublesome for workers to complete the operation in a group of castings for molds of different specifications, and higher requirements are imposed on the on-site operators, resulting in low production efficiency. This ensures that during the casting process, the operation experience and requirements of workers are reduced, the labor intensity of workers and the equipment adjustment time are reduced, the production efficiency and automation level are improved, and an important technical problem urgently to be solved by those skilled in the art is solved.

[0063] To further achieve the above technical effects, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, the longitudinal drive conveyor device 100 further includes:

[0064] An electric motor drive device 10 is provided at one end of the longitudinal drive conveyor device 100; a chain 4 is driven on the driving main shaft 3 of the electric motor drive device 10; a plurality of buckles 41 are fixed above the chain 4, and the buckles 41 are snapped into the hanging grooves 51 provided below the mold cart device 20 to drive the mold cart device 20 to move along the preset axis direction of the longitudinal drive conveyor device 100, that is, the Y-axis direction; the electric motor drive device 10 driving the chain 4 to drive mainly serves to provide power, and the chain 4 is wound around the support base 9.

[0065] Further to achieve the above technical effects, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, the electric motor drive device 10 further includes:

[0066] An electric motor 1 is fixed on one side of the electric motor drive device 10; the electric motor 1 provides power for the electric motor drive device 10;

[0067] A speed reducer 11, the speed reducer 11 is shaft-connected to one end of the electric motor 1;

[0068] A driving main shaft 31, the driving main shaft 31 is connected to the output shaft of the speed reducer 11 through a coupling 311; the bearing seats 312 are movably connected to both ends of the driving main shaft 31;

[0069] A driving gear 313 is fixed on the driving main shaft 31; a driven gear 315 on a driven main shaft 314 at the other end of the longitudinal driving and conveying device 100 is connected with the driving gear 313 by a chain. The motor driving device 10 forms a chain wheel driving structure to drive the die cart device 20 to move along the preset axis direction of the longitudinal driving and conveying device 100, i.e., the Y-axis direction.

[0070] Furthermore, to achieve the above technical effects, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, the die cart device 20 further includes:

[0071] A chain box body 50 is respectively arranged above and below the support base 9. A chain 4 is arranged in the chain box body 50, and the chain 4 forms an annular chain drive between the driving main shaft 31 and the driven main shaft 314;

[0072] A smelting chamber sheave track 54 is fixed above the support base 9 in parallel on one side of the chain 4;

[0073] A flat wheel track 55 is fixed on both sides of the smelting chamber sheave track 54 above the support base 9 on the other side of the chain 4;

[0074] A V-shaped sheave 52 is stuck on the smelting chamber sheave track 54;

[0075] A flat wheel 53 is arranged on the flat wheel track 55;

[0076] A die cart roller 59 is respectively arranged between the V-shaped sheave 52 and the flat wheel 53;

[0077] A die cart 5 is fixed above the die cart roller 59;

[0078] A plurality of weighing sensors 57 are fixed at the upper end of the die cart 5; the weighing sensors 57 weigh the molten steel to control the weight of the molten steel for casting.

[0079] A mold plate 56 is placed on the weighing sensors 57;

[0080] A plurality of molds 58 are fixed on the die cart 5. The structure of the die cart device 20 can enable it to move on the plane formed by the longitudinal driving and conveying device 100 and the transverse driving and conveying device 200, providing a structural support for casting.

[0081] Furthermore, to achieve the above technical effects, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, the horizontal drive and conveying device 200 further includes:

[0082] The driving linear actuator 6 drives the crucible mechanism 300 to reciprocate in the direction of the preset axis of the horizontal drive and conveying device 200, that is, the X-axis direction; one end of the driving linear actuator 6 is fixed; the other end of the driving linear actuator 6 is movably connected to the crucible mechanism 300; a dust cover 62 is fixed above the driving linear actuator 6. In the X-axis direction, the driving linear actuator 6 drives the crucible mechanism 300 to reciprocate in the X-axis direction of the horizontal drive and conveying device 200, so as to realize the movement in the X direction.

[0083] Furthermore, in order to achieve the above technical effects, as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the crucible mechanism 300 further includes:

[0084] The bottom plate track 301 is fixed to the bottom of the crucible mechanism 300; a slider 302 is movably connected to the bottom plate track 301, and a slide plate 303 is fixed above the slider 302; one end of the slide plate 303 is fixedly connected to one end of the driving linear actuator 6; the slide plate 303 moves along the preset axis of the horizontal drive and conveying device 200 under the drive of the driving linear actuator 6;

[0085] The crucible support mechanism 7 is fixed to the slide plate 303, one end of the crucible support mechanism 7 is movably connected to both ends of the melting crucible 71 through a rocker arm 74, and the other end of the crucible support mechanism 7 is fixed to the slide plate 303;

[0086] On one side of the top end of the crucible support mechanism 7, a runner 72 is fixed near the mold cart 5 side; the runner 72 is formed to be arranged on the preset axis perpendicular to the longitudinal drive and conveying device 100; the mold cart 5 is driven by the longitudinal drive and conveying device 100 to the lower part of the runner 72;

[0087] The melting crucible 71 is fixed between both sides of the rocker arm 74, and a rotating shaft 75 is movably connected to the rocker arm 74 and on the crucible support mechanism 7; the other end of the melting crucible 71 is movably connected to a hydraulic mechanism 73, and the melting crucible 71 drives the rocker arm 74 to rotate around the rotating shaft 75 through the hydraulic mechanism 73, driving the melting crucible 71 to tilt for casting.

[0088] Furthermore, in order to achieve the above technical effects, as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the motor 1 is a servo motor or a stepper motor.

[0089] Furthermore, in order to achieve the above technical effects, as Figure 5As shown, the driving linear actuator 6 is a hydraulic cylinder or a servo electric cylinder;

[0090] The main control system 400 further includes:

[0091] A PLC 401, serving as the controller of the main control system 400;

[0092] The drive controller 402 is electrically connected to the PLC 401, and the PLC 401 is communicatively connected to the human - machine interface 8;

[0093] The weighing sensor 57 is electrically connected to the PLC 401.

[0094] In the second embodiment of the present invention, a control method for an automatic casting device of a vacuum induction furnace is further provided. As Figure 9 , it includes the following steps:

[0095] Step S10: Parameter setting. Input the steel grade for smelting, steel grade density, melting temperature, initial weight of the mold car, dynamically - measured weight of the mold car during casting, input the arranged position of the molds, mold shape, number of molds, input the origin (x0, y0) of the mold plate system, rotational speed of the motor 1, rotation direction of the motor 1, stroke of the lateral drive conveyor 200, direction of the lateral drive conveyor 200, stroke of the longitudinal drive conveyor 100, and direction of the longitudinal drive conveyor 100 in the human - machine interface 8, and then enter step S20;

[0096] Step S20: Calculate the weight of the molten steel. xi molds are arranged in the preset direction of the lateral drive conveyor 200 and Yj molds are arranged in the preset direction of the longitudinal drive conveyor 100 in a regular arrangement for the molds 58; input the mold layout diagram in the human - machine interface 8, and input the inner - circle radius and various mold dimensions of each mold 58, and calculate the weight of the molten steel filled in the cavity of each mold 58, then enter step S30;

[0097] Step S30: Determine the casting coordinates. The drive controller 402 drives the longitudinal drive conveyor 100 to drive the mold plate 56 to the system origin (x0, y0), and confirm the casting - point coordinates (xa, ya) of each mold in the mold layout diagram on the human - machine interface 8; formulate the casting path according to the mold layout diagram, set the casting - end coordinates (xn, ym), and input the total weight M of the molten steel in the melting crucible in the human - machine interface 8; enter step S40;

[0098] Step S40: Determine the weight of molten steel ms required for a single mold 58. Calculate the weight of molten steel ms required for a single mold according to the total weight M of the molten steel in the melting crucible in step S30 based on the mold layout diagram, and then enter step S50;

[0099] Step S50: Casting. The drive controller 402 drives the longitudinal drive conveyor 100 to drive the mold plate 56 to perform casting according to the mold layout diagram. During the casting process, the dynamic value of the weight increase of the mold cart plate 56 is collected by the weighing sensor 57. When the dynamic value of the weight increase of the mold cart plate 56 is equal to the weight of molten steel ms required for the current mold, the casting of the current mold 58 is completed. According to the set casting path, the drive controller 402 drives the longitudinal drive conveyor 100 and the lateral drive conveyor 200 to move to the next casting point on the set casting path; continue casting until the casting is completed, and then loop back to step S40; if a casting error occurs, enter step S60; if the drive controller 402 drives the longitudinal drive conveyor 100 to drive the mold plate 56 to the casting end coordinates (xn, ym); and after the casting is completed; the value of the weighing sensor 57 is still greater than zero; then the weight of the cast molten steel is excessive, and enter step S70;

[0100] Step S60, automatically end casting;

[0101] Step S70: Return to the origin to pour out the excess molten steel; the drive controller 402 drives the longitudinal drive conveyor 100 to drive the mold plate 56 to the origin (x0, y0) of the mold plate system, pour back the excess molten steel, and zero the weighing sensor 57.

[0102] If a casting error occurs, including any one of the following two conditions, enter the above step S60 to automatically end casting;

[0103] Condition 1: When the drive controller 402 drives the longitudinal drive conveyor 100 to drive the mold plate 56 to reach the set casting end point (xn, ym) according to the mold layout diagram, the included angle between the melting crucible 71 and the crucible support mechanism 7 in the vertical direction is greater than or equal to 90°, and the weight collected by the weighing sensor 57 does not increase within the alarm time, enter step S60;

[0104] Condition 2: When the drive controller 402 drives the longitudinal drive conveyor 100 to drive the mold plate 56 according to the mold layout diagram and does not reach the set casting end point (xn, ym), enter step S60.

[0105] In the present invention, 3 kinds of mold layout diagrams are provided, as Figure 6 , Figure 7 and Figure 8 shown, and all can achieve casting.

[0106] In Figure 6 , the casting path has 4 positions. The drive controller 402 drives the longitudinal drive conveyor 100 to drive the mold plate 56 to perform casting in the order shown in Figure 6 to form a square mold layout diagram. After the casting of the first casting point is completed, according toFigure 6 For the casting path set in the shown sequence, the drive controller 402 drives the longitudinal drive conveyor 100 and the lateral drive conveyor 200 to move to the next casting point of the set casting path, successively according to the second casting point, the third casting point, and the fourth casting point; continue casting until the casting is completed.

[0107] In Figure 7 , the casting path has 6 positions. The drive controller 402 drives the longitudinal drive conveyor 100 to drive the mold plate 56 to perform casting according to the mold layout diagram as Figure 7 shown, and moves out of the rectangular mold layout diagram. After the first casting point is completed, according to the casting path set in the sequence as Figure 7 shown, the drive controller 402 drives the longitudinal drive conveyor 100 and the lateral drive conveyor 200 to move to the next casting point of the set casting path, successively according to the second casting point, the third casting point, the fourth casting point, the fifth casting point, and the sixth casting point; continue casting until the casting is completed.

[0108] In Figure 8 , the casting path has 9 positions. The drive controller 402 drives the longitudinal drive conveyor 100 to drive the mold plate 56 to perform casting according to the mold layout diagram as Figure 7 shown, and moves out of the rectangular mold layout diagram. After the first casting point is completed, according to the casting path set in the sequence as Figure 8 shown, the drive controller 402 drives the longitudinal drive conveyor 100 and the lateral drive conveyor 200 to move to the next casting point of the set casting path, successively according to the second casting point, the third casting point, the fourth casting point, the fifth casting point, the sixth casting point, the seventh casting point, the eighth casting point, and the ninth casting point; continue casting until the casting is completed.

[0109] Those of ordinary skill in the art can understand that the above embodiments are specific examples for implementing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. A control method for an automatic casting device of a vacuum induction furnace, characterized in that, Including the following steps: Step S10: Parameter setting. Input the steel grade for smelting, steel grade density, melting temperature, initial weight of the mold car, dynamically measured weight of the mold car during casting, mold arrangement position, mold shape, number of molds, origin (x0, y0) of the mold plate system, rotational speed of the motor, motor rotation direction, stroke of the lateral drive conveyor, direction of the lateral drive conveyor, stroke of the longitudinal drive conveyor, and direction of the longitudinal drive conveyor in the human-machine interface, and then proceed to step S20; Step S20: Calculate the weight of the molten steel. Arrange the molds in a regular column, with xi molds set in the preset direction of the longitudinal drive conveyor and Yj molds set in the preset direction of the longitudinal drive conveyor; input the mold arrangement diagram in the human-machine interface, and input the inner circle radius and dimensions of each mold, and calculate the weight of the molten steel when each mold cavity is filled, and then proceed to step S30; Step S30: Determine the casting coordinates. The drive controller drives the longitudinal drive conveyor to move the mold plate to the system origin (x0, y0), and confirm the casting point coordinates (xa, ya) of each mold in the mold arrangement diagram on the human-machine interface; formulate the casting path according to the mold arrangement diagram, set the casting end coordinates (xn, ym), and input the total weight M of the molten steel in the melting crucible in the human-machine interface; Proceed to step S40; Step S40: Determine the weight of molten steel required for a single mold. Calculate the weight of molten steel required for a single mold ms from the total weight M of the molten steel in the melting crucible in step S30 according to the mold arrangement diagram, and then proceed to step S50; Step S50: Casting. The drive controller drives the longitudinal drive conveyor to drive the mold plate to perform casting according to the mold arrangement diagram. During casting, collect the dynamic increase value of the weight of the mold car plate through the weighing sensor. When the dynamic increase value of the weight of the mold car plate is equal to the weight of molten steel required for the current mold ms, the current mold casting is completed. According to the set casting path, the drive controller drives the longitudinal drive conveyor and the lateral drive conveyor to move to the next casting point on the set casting path; continue casting until casting is completed, and then loop back to step S40; if a casting error occurs, then proceed to step S60; if the drive controller drives the longitudinal drive conveyor to drive the mold plate to the casting end coordinates (xn, ym); and after casting is completed; the value of the weighing sensor is still greater than zero; then the weight of the cast molten steel is excessive, and proceed to step S70; Step S60: Automatically end casting. The drive conveyor drives the mold plate to return to the origin (x0, y0) of the mold plate system; Step S70: Return to the origin and pour out the excess molten steel. The drive controller drives the longitudinal drive conveyor to drive the mold plate to the origin (x0, y0) of the mold plate system, pour back the excess molten steel, and zero the weighing sensor.

2. The control method of the automatic casting device for a vacuum induction furnace according to claim 1, wherein the casting error includes any one of the following two conditions and proceeds to the said step S60; Condition 1: When the drive controller drives the longitudinal drive conveying device to drive the mold plate to reach the set casting end point (xn, ym) according to the mold layout diagram, the included angle between the melting crucible and the crucible support mechanism in the vertical direction is greater than or equal to 90°, and the weight collected by the weighing sensor does not increase within the alarm time, then enter step S60 described above; Condition 2: When the drive controller drives the longitudinal drive conveying device to drive the mold plate and does not reach the set casting end point (xn, ym) according to the mold layout diagram, then enter step S60 described above.

3. The control method of the automatic casting device of the vacuum induction furnace according to claim 2, characterized in that, Wherein, The automatic casting device for a vacuum induction furnace includes: A longitudinal drive conveying device, which is arranged along the preset axis of the automatic casting device for the vacuum induction furnace; A transverse drive conveying device, which is arranged along the vertical direction of the longitudinal drive conveying device; A crucible mechanism, which is controlled by the main control system to perform casting on the plane formed by the longitudinal drive conveying device and the transverse drive conveying device; The longitudinal drive conveying device includes: A motor drive device, which is arranged at one end of the longitudinal drive conveying device; a chain drive is arranged on the driving transmission shaft of the motor drive device; several buckles are fixed above the chain, and the buckles are snapped into the hanging grooves arranged below the mold cart device to drive the mold cart device to move along the preset axis direction of the longitudinal drive conveying device; The chain is wound around the support base; The motor drive device includes: A motor, which is fixed on one side of the motor drive device; A speed reducer, which is shaft-connected to the motor at one end; A driving transmission shaft, which is connected to the output shaft of the speed reducer through a coupling; bearing seats are movably connected to both ends of the driving transmission shaft; A driving transmission gear, which is fixed on the driving transmission shaft; a chain is connected to the driven transmission gear arranged at the other end of the longitudinal drive conveying device on the driving transmission gear; The mold cart device includes: A chain box body, which is respectively arranged above and below the support base, and a chain is arranged in the chain box body, and the chain forms an annular chain drive between the driving transmission shaft and the driven transmission shaft; A melting chamber sheave track, which is fixed parallel above the support base on one side of the chain; A flat wheel track, which is fixed on both sides of the melting chamber sheave track above the support base on the other side of the chain; A V-shaped sheave, which is stuck on the melting chamber sheave track; A flat wheel, which is arranged on the flat wheel track; Mold cart rollers, which are respectively arranged between the V-shaped sheave and the flat wheel; A mold cart, which is fixed above the mold cart rollers; Weighing sensors, several of which are fixed at the upper end of the mold cart; The mold plate is placed on the weighing sensor. The mold, several of the molds are fixed on the mold cart.

4. The control method of the automatic casting device of the vacuum induction furnace according to claim 3, characterized in that, The transverse drive and conveying device includes: The driving linear actuator, the driving linear actuator drives the crucible mechanism to reciprocate in the direction of the preset axis of the transverse drive and conveying device; one end of the driving linear actuator is fixed; the other end of the driving linear actuator is movably connected to the crucible mechanism; a dust cover is fixed above the driving linear actuator.

5. The control method of the automatic casting device of the vacuum induction furnace according to claim 3, characterized in that, The crucible mechanism includes: The bottom plate track is fixed at the bottom of the crucible mechanism; a slider is movably connected to the bottom plate track, and a slide plate is fixed above the slider; one end of the slide plate is fixedly connected to one end of the driving linear actuator; the slide plate moves along the preset axis of the transverse drive and conveying device under the drive of the driving linear actuator. The crucible support mechanism is fixed on the slide plate, one end of the crucible support mechanism is movably connected to both ends of the melting crucible through a rocker arm, and the other end of the crucible support mechanism is fixed on the slide plate. The launder is fixed on one side of the top of the crucible support mechanism, near the mold cart side; the launder is formed and arranged perpendicular to the preset axis of the longitudinal drive and conveying device; the mold cart is driven by the longitudinal drive and conveying device to the lower part of the launder. The melting crucible is fixed between both sides of the rocker arm, and a rotating shaft is movably connected to the rocker arm and on the crucible support mechanism; the other end of the melting crucible is movably connected to a hydraulic mechanism, and the melting crucible drives the rocker arm to rotate around the rotating shaft through the hydraulic mechanism, driving the melting crucible to tilt for casting.

6. The control method of the automatic casting device for a vacuum induction furnace according to claim 3, characterized in that, The motor is a servo motor or a stepper motor.

7. The control method of the automatic casting device for a vacuum induction furnace according to claim 4, characterized in that, The driving linear actuator is a hydraulic cylinder or a servo electric cylinder. The main control system includes: The PLC, the PLC serves as the controller of the main control system. The drive controller is electrically connected to the PLC, and the PLC is communicatively connected to the human-machine interface. The weighing sensor is electrically connected to the PLC.

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