A process for improving the quality of large flat castings

Abstract

The application discloses a process method for improving the pouring quality of large flat castings, which comprises the following steps: S1, molding; S2, taking a mold; S3, closing a box; S4, smelting and pouring; S5, starting a pouring auxiliary device to ensure the smooth pouring process and make the pouring more efficient and sufficient; and S6, sand cutting and finishing. The pouring auxiliary device used in the steps S4 and S5 comprises a base, two threaded barrels are rotationally connected to the upper end of the base, a screw rod is threadedly connected in each threaded barrel, and a supporting seat is rotationally connected to the upper end of the screw rod. The two screw rods are alternately lifted to drive the plate box and the sand mold on the upper side of the plate box to be alternately and slowly lifted left and right, so that the steel liquid at the bottom of the inclined angle can flow in the sand mold and can be uniformly filled in the sand mold, and the surface quality of the castings poured out is ensured to be consistent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casting pouring, in particular to a process method for improving the pouring quality of large flat castings. BACKGROUND

[0002] The pouring position of large flat castings is generally selected as a horizontal pouring or vertical pouring process method. The surface area of this type of casting is large, the height is low, the steel liquid is scattered and dispersed during filling, the filling capacity is poor, the steel liquid forming is poor, and defects such as under-pouring, sand inclusion and porosity are prone to occur.

[0003] In order to improve the above-mentioned defects, the sand mold is currently placed at a certain angle for pouring. Although the filling capacity is improved, the steel liquid at the bottom of the inclined angle will deposit and not flow after the sand mold is inclined, making it difficult to uniformly cover the front and back sides of the inside of the sand mold, resulting in differences in the surface quality of the front and back sides of the castings poured out. Accordingly, the present application proposes a process method for improving the pouring quality of large flat castings. SUMMARY

[0004] The purpose of the present application is to solve the shortcomings in the prior art and propose a process method for improving the pouring quality of large flat castings.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A process method for improving the pouring quality of large flat castings, comprising the following steps:

[0007] S1, molding, selecting a suitable sand box according to the size of the mold, placing the riser, cold iron and ceramic casting pipe on the mold according to the process file, and then starting the sand mixer to fill sand;

[0008] S2, taking the mold, taking out the hardened sand mold to obtain the sand mold, and brushing the sand mold surface with alcohol-based zirconium powder paint;

[0009] S3, closing the box, closing the two half sand molds together and locking the sand box to form the mold cavity of the casting;

[0010] S4, smelting and pouring, placing the sand mold on the pouring auxiliary device, and then pouring the smelted steel liquid into the mold cavity;

[0011] S5, starting the pouring auxiliary device to ensure smooth pouring and make the pouring more efficient and sufficient;

[0012] S6, sand cutting, finishing, hoisting the casting out of the sand mold, cutting the riser and finishing and polishing;

[0013] The pouring assisting device used in steps S4 and S5 comprises a base, two threaded cylinders are rotationally connected to the upper end of the base, a screw rod is threadedly connected in each threaded cylinder, a supporting seat is rotationally connected to the upper end of the screw rod, a plate box is fixedly connected to the upper end of the supporting seat, two drive grooves are formed in the side wall of the base, a worm is rotationally connected in the drive groove, the lower end of the threaded cylinder extends into the drive groove, a worm wheel is fixedly connected to the lower end of the threaded cylinder, the worm wheel is engaged with the worm, a transmission groove is formed in the side wall of the base, an incomplete gear is rotationally connected in the transmission groove, the incomplete gear is in transmission connection with the worm through a connecting mechanism, a push plate is fixedly connected to the side wall of the worm, a fixed plate is fixedly connected to the inner wall of the drive groove, the push plate and the fixed plate are connected through a return spring, a driving motor is fixedly installed on the side wall of the base, the output shaft of the driving motor is fixedly connected with the incomplete gear

[0014] Preferably, the connecting mechanism comprises a transmission gear rotationally connected above the inner wall of the transmission groove, a first bevel gear is fixedly connected to the side wall of the transmission gear, a second bevel gear is also rotationally connected to the inner wall of the transmission groove, the worm is fixedly connected with the second bevel gear, and the first bevel gear and the second bevel gear are engaged with each other.

[0015] Preferably, the plate box is provided with a condenser pipe distributed around, the side wall of the base is provided with a liquid storage groove, the liquid storage groove is provided with a cooling liquid, the side wall of the base is provided with a sliding groove, the sliding groove is in communication with the liquid storage groove through a one-way liquid inlet pipe, the condenser pipe is in communication with the sliding groove through a one-way liquid outlet pipe, a sliding plug is sealingly and slidably connected in the sliding groove, a pushing mechanism for pushing the sliding plug to move is installed on the sliding plug, and the condenser pipe is in communication with the liquid storage groove through a liquid return pipe.

[0016] Preferably, the pushing mechanism comprises a rack slidably connected to the inner wall of the transmission groove, the rack is matched with the incomplete gear, the rack is fixedly connected with the sliding plug through a push rod, a push plate is fixedly connected to the end of the rack away from the push rod, and the push plate is connected to the inner wall of the transmission groove through an extension spring.

[0017] Preferably, a plurality of heat-conducting fins are fixedly connected to the side wall of the condenser pipe, and the heat-conducting fins penetrate through the side wall of the plate box and extend to the lower side of the plate box.

[0018] Preferably, a one-way air inlet is formed in the bottom of the sliding groove, a one-way air outlet pipe in communication with the inside of the sliding groove is installed on the base, a plurality of air outlet holes are formed in the side wall of the one-way air outlet pipe, and each air outlet hole is opposite to a heat-conducting fin.

[0019] Preferably, two baffles are fixedly connected to the upper end of the plate box, and the two baffles are symmetrically arranged along the center of the plate box.

[0020] The present application has the following beneficial effects:

[0021] 1. By setting the pouring auxiliary device, after pouring the liquid steel into the sand mold, the pouring auxiliary device is started, and through the speed reduction cooperation of the worm gear and the worm, the slow rotation of the threaded barrels on both sides can be realized under the action of the connecting mechanism, so that the alternating lifting of the threaded rods on both sides can be realized, and the alternating slow lifting of the plate box and the sand mold on the upper side can be realized, so that the inclined pouring of a certain angle can be realized, and the inclined position is constantly changed, the liquid steel at the bottom of the inclined angle can flow in the sand mold, and the liquid steel can be uniformly filled in the sand mold, so that the surface quality of the castings poured out is consistent.

[0022] 2. By setting the condenser pipe, liquid storage tank, chute, sliding plug and pushing mechanism and other components, the sliding plug can be reciprocatingly moved by the pushing mechanism after the pouring of the liquid steel is completed, so that the cooling liquid in the liquid storage tank can be circulated in the condenser pipe, the liquid steel in the sand mold can be quickly cooled and formed, and the pouring and forming efficiency is improved.

[0023] 3. By setting a plurality of heat conducting sheets, the heat absorbed by the condenser pipe can be quickly dissipated, and by setting a one-way air outlet pipe, the air flow near the heat conducting sheets can be accelerated, the heat dissipation speed of the heat conducting sheets and the condenser pipe is further enhanced, and the liquid steel in the sand mold can be more quickly cooled and formed. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The structure schematic view of the pouring auxiliary device of the present application is shown.

[0025] Figure 2 The structure schematic view of the pouring auxiliary device of the present application is shown. Figure 1 The structure schematic view of the pouring auxiliary device of the present application is shown.

[0026] Figure 3 The structure schematic view of the pouring auxiliary device of the present application is shown. Figure 1 The structure schematic view of the pouring auxiliary device of the present application is shown.

[0027] Figure 4 The structure schematic view of the pouring auxiliary device of the present application is shown.

[0028] Figure 5 The structure schematic view of the pouring auxiliary device of the present application is shown.

[0029] Figure 6 The structure schematic view of the pouring auxiliary device of the present application is shown. Figure 3 The structure schematic view of the pouring auxiliary device of the present application is shown.

[0030] In the figure: 1 base, 2 threaded cylinder, 3 screw rod, 4 support seat, 5 box, 6 condenser tube, 7 baffle, 8 liquid storage tank, 9 chute, 10 sliding plug, 11 push rod, 12 drive groove, 13 transmission groove, 14 incomplete gear, 15 transmission gear, 16 first bevel gear, 17 second bevel gear, 18 worm, 19 rack, 20 push plate, 21 extension spring, 22 worm wheel, 23 toggle plate, 24 return pipe, 25 one-way liquid outlet pipe, 26 heat-conducting sheet, 27 one-way air inlet, 28 one-way air outlet pipe, 29 air vent, 30 drive motor, 31 return spring, 32 fixed plate, 33 one-way liquid inlet pipe, 34 sand mold. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0032] A process method for improving the pouring quality of large flat castings, comprising the following steps:

[0033] S1, molding, selecting a suitable sand box according to the size of the mold, placing the riser, cold iron and ceramic casting pipe on the mold according to the process file, and then starting the sand mixer to fill sand;

[0034] S2, taking out the mold, taking out the hardened sand mold, and brushing the alcohol-based zirconium powder paint on the surface of the sand mold;

[0035] S3, closing the box, closing the two half sand molds together and locking the sand box to form the mold cavity of the casting;

[0036] S4, smelting and pouring, placing the sand mold on the pouring auxiliary device, and then pouring the molten steel into the mold cavity;

[0037] S5, start the pouring auxiliary device to ensure smooth pouring process, and also make the pouring more efficient and sufficient;

[0038] S5, sand cutting, finishing, lifting the casting out of the sand mold, cutting the riser and finishing and polishing;

[0039] Reference Figures 1-6The pouring assisting device used in steps S4 and S5 comprises a base 1, two threaded cylinders 2 are rotatably connected to the upper end of the base 1, a screw rod 3 is threadedly connected in each threaded cylinder 2, a support seat 4 is rotatably connected to the upper end of the screw rod 3, a plate box 5 is fixedly connected to the upper end of the support seat 4, two drive grooves 12 are formed in the side wall of the base 1, a worm 18 is rotatably connected in the drive groove 12, the lower end of the threaded cylinder 2 extends into the drive groove 12, a worm wheel 22 is fixedly connected to the lower end of the threaded cylinder 2, the worm wheel 22 is engaged with the worm 18, a transmission groove 13 is formed in the side wall of the base 1, an incomplete gear 14 is rotatably connected in the transmission groove 13, the incomplete gear 14 is drivingly connected with the worm 18 through a connecting mechanism, a push plate 23 is fixedly connected to the side wall of the worm 11, a fixed plate 32 is fixedly connected to the inner wall of the drive groove 12, the push plate 23 and the fixed plate 32 are connected through a return spring 31, a driving motor 30 is fixedly installed on the side wall of the base 1, the output shaft of the driving motor 30 is fixedly connected with the incomplete gear 14.

[0040] The connecting mechanism comprises a transmission gear 15 rotatably connected to the inner wall above the transmission groove 13, a first bevel gear 16 is fixedly connected to the side wall of the transmission gear 15, a second bevel gear 17 is also rotatably connected to the inner wall of the transmission groove 13, the worm 18 is fixedly connected with the second bevel gear 17, and the first bevel gear 16 and the second bevel gear 17 are engaged with each other.

[0041] The plate box 5 is provided with condenser pipes 6 distributed around, the side wall of the base 1 is provided with a liquid storage groove 8, the liquid storage groove 8 is provided with cooling liquid, the side wall of the base 1 is provided with a sliding groove 9, the sliding groove 9 is communicated with the liquid storage groove 8 through a one-way liquid inlet pipe 33, the condenser pipes 6 are communicated with the sliding groove 9 through a one-way liquid outlet pipe 25, a sliding plug 10 is sealingly and slidably connected in the sliding groove 9, a pushing mechanism for moving the sliding plug 10 is installed on the sliding plug 10, the condenser pipes 6 are communicated with the liquid storage groove 8 through a liquid return pipe 24. It should be noted that the one-way liquid inlet pipe 33 and the one-way liquid outlet pipe 25 are both provided with one-way stop valves to realize the one-way liquid inlet or one-way liquid outlet function, specifically, the cooling liquid can only flow into the sliding groove 9 through the one-way liquid inlet pipe 33 in one direction, and can only flow from the sliding groove 9 to the one-way liquid outlet pipe 25 in one direction.

[0042] Referring to Figure 2 The pushing mechanism comprises a rack 19 slidably connected to the inner wall of the transmission groove 13, and the rack 19 cooperates with the incomplete gear 14, the rack 19 is fixedly connected with the sliding plug 10 through a push rod 11, a push plate 20 is fixedly connected to the end of the rack 19 away from the push rod 11, and the push plate 20 is connected to the inner wall of the transmission groove 13 through an extension spring 21. By setting the pushing mechanism composed of the rack 19, the push rod 11 and the extension spring 21, intermittent cooperation transmission between the incomplete gear 14 and the rack 19 can be utilized, and the sliding plug 10 moves back and forth under the action of the extension spring 21.

[0043] The side wall of the condenser pipe 6 is fixedly connected with a plurality of heat-conducting sheets 26, and the heat-conducting sheets 26 penetrate the side wall of the plate box 5 and extend to the lower side of the plate box 5. The inner bottom of the chute 9 is provided with a one-way air inlet 27, and the base 1 is provided with a one-way air outlet pipe 28 which is in communication with the inside of the chute 9. It should be noted that the one-way air inlet 27 and the one-way air outlet pipe 28 are both provided with one-way stop valves to realize the one-way air inlet and air outlet functions, that is, air can only enter the chute 9 from the one-way air inlet 27 and can only be discharged from the one-way air outlet pipe 28.

[0044] The side wall of the one-way air outlet pipe 28 is provided with a plurality of air outlet holes 29, and each air outlet hole 29 is opposite to a heat-conducting sheet 26. The upper end of the plate box 5 is fixedly connected with two baffles 7, and the two baffles 7 are symmetrically arranged along the center of the plate box 5. It should be noted that the left end of the one-way air outlet pipe 28 is in a blocked state, so that the air flow input into the one-way air outlet pipe 28 can only be discharged from each air outlet hole 29.

[0045] During use of the pouring auxiliary device, when the sand mold 34 is poured with molten steel, the driving motor 30 can be started to drive the incomplete gear 14 to rotate cyclically. During the rotation of the incomplete gear 14, the incomplete gear 14 will be engaged with and disengaged from the transmission gears 15 on both sides in sequence.

[0046] Referring to Figure 2 , Figure 3 and Figure 6 , when the toothed part of the incomplete gear 14 rotates to the left side and is engaged with the left transmission gear 15, the left transmission gear 15 will be driven to rotate, so that the first bevel gear 16 and the second bevel gear 17 drive the worm 18 to rotate, and the worm 18 simultaneously drives the toggle plate 23 to rotate synchronously, and the return spring 31 is retracted.

[0047] The worm 18 also drives the worm wheel 22 to rotate slowly, and drives the threaded cylinder 2 on the left side to rotate synchronously slowly, and at the same time, the threaded rod 3 on the left side extends upward by a distance, so that the plate box 5 and the sand mold 34 above it are pushed to tilt to the right. Subsequently, the toothed part of the incomplete gear 14 rotates to the upper side and is disengaged from the left transmission gear 15, at this time, the transmission gear 15 returns to the free rotation state, referring to Figure 6 , the return spring 31 can drive the toggle plate 23 and the worm 18 to rotate to the reset position, and the second bevel gear 17, the first bevel gear 16 and the transmission gear 15 also rotate to the reset position. When the worm 18 rotates to the reset position, the worm wheel 22 and the threaded cylinder 2 also rotate to the reset position, and the threaded rod 3 moves downward to the reset position, so that the plate box 5 returns to the horizontal state.

[0048] Subsequently, the toothed part of the incomplete gear 14 rotates to the right side and the lower side, and is engaged with and disengaged from the transmission gear 15 on the right side, and the plate box 5 on the right side is also raised and returns to the horizontal state.

[0049] Therefore, the device can drive the plate box 5 and the sand mold 34 above it to slowly rise and fall alternately on the left and right sides after starting, so that it can realize inclined pouring at a certain angle, constantly change the inclined position, and make the steel liquid at the bottom of the inclined angle flow in the sand mold 34 and uniformly fill in the sand mold 34, thereby ensuring the surface quality of the castings poured out to be consistent.

[0050] In addition, the gear 14 will also be engaged and disengaged with the rack 19 on the lower side periodically during rotation, so that the push plate 20 and the rack 19 can be pushed to move left and right reciprocally under the action of the extension spring 21, and the rack 19 pushes the sliding plug 10 to move reciprocally in the sliding groove 9 through the push rod 11. When the sliding plug 10 moves to the right, the cooling liquid in the liquid storage groove 8 can be sucked into the sliding groove 9 through the one-way liquid inlet pipe 33, and when the sliding plug 10 moves to the left, the cooling liquid sucked into the sliding groove 9 can be pushed into the condensing pipe 6 through the one-way liquid outlet pipe 25, and finally extruded back into the liquid storage groove 8 through the liquid return pipe 24. Therefore, when the sliding plug 10 moves left and right, the cooling liquid can be continuously circulated in the condensing pipe 6, so that the heat of the sand mold 34 can be quickly absorbed and dissipated, and the steel liquid in the sand mold can be quickly cooled and formed, thereby improving the pouring and forming efficiency.

[0051] Furthermore, when the sliding plug 10 moves to the left, air can be sucked in through the one-way air inlet 27, and when the sliding plug 10 moves to the right, air can be output through the one-way air outlet pipe 28, which blows to the heat-conducting fins 26 from the exhaust holes 29, thereby accelerating the air flow near the heat-conducting fins 26, so that the heat-conducting fins 26 can quickly absorb the heat of the condensing pipe 6 and dissipate it, further enhancing the heat dissipation speed of the heat-conducting fins 26 and the condensing pipe 6, so that the steel liquid in the sand mold can be cooled and formed more quickly.

[0052] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A process for improving the quality of a large flat casting, characterized in that, It comprises the following steps: S1, molding, selecting a suitable sand box according to the size of the mold, placing the riser, cold iron, ceramic casting pipe on the mold according to the process file, and then starting the sand mixer to fill sand; S2, take the mold, take out the hardened sand mold, get the sand mold, and brush the alcohol-based zirconium powder paint on the surface of the sand mold; S3, clamping, clamping the two half sand molds together and locking the sand box to form the cavity of the casting; S4, smelting and pouring, placing the sand mold on the pouring auxiliary device, and then pouring the molten steel into the cavity; S5, start the pouring auxiliary device to ensure smooth pouring and make the pouring more efficient and sufficient; S6, sand cutting, finishing, lifting the casting from the sand mold, cutting the riser and finishing and polishing; The pouring auxiliary device used in the above step S4 comprises a base (1), the upper end of the base (1) is rotatably connected with two threaded cylinders (2), the threaded cylinder (2) is threadedly connected with a screw rod (3), the upper end of the screw rod (3) is rotatably connected with a support seat (4), the upper end of the support seat (4) is fixedly connected with a plate box (5), two drive grooves (12) are formed in the side wall of the base (1), a worm (18) is rotatably connected in the drive groove (12), the lower end of the threaded cylinder (2) extends into the drive groove (12), and the lower end of the threaded cylinder (2) is fixedly connected with a worm wheel (22), the worm wheel (22) is engaged with the worm (18), a transmission groove (13) is formed in the side wall of the base (1), an incomplete gear (14) is rotatably connected in the transmission groove (13), the incomplete gear (14) is drivingly connected with the worm (18) through a connecting mechanism, the side wall of the worm (18) is fixedly connected with a toggle plate (23), the inner wall of the drive groove (12) is fixedly connected with a fixed plate (32), the toggle plate (23) and the fixed plate (32) are connected through a return spring (31), and the side wall of the base (1) is fixedly installed with a driving motor (30), the output shaft of the driving motor (30) is fixedly connected with the incomplete gear (14); The connecting mechanism comprises a transmission gear (15) rotatably connected to the inner wall above the transmission groove (13), the side wall of the transmission gear (15) is fixedly connected with a first bevel gear (16), the inner wall of the transmission groove (13) is also rotatably connected with a second bevel gear (17), the worm (18) is fixedly connected with the second bevel gear (17), and the first bevel gear (16) and the second bevel gear (17) are engaged with each other; The box (5) is internally provided with a condenser pipe (6) distributed around, the sidewall of the base (1) is provided with a liquid storage groove (8), the liquid storage groove (8) is internally provided with cooling liquid, the sidewall of the base (1) is provided with a sliding groove (9), the sliding groove (9) is communicated with the liquid storage groove (8) and is provided with a one-way liquid inlet pipe (33), the condenser pipe (6) is communicated with the sliding groove (9) and is provided with a one-way liquid outlet pipe (25), the sliding groove (9) is internally and sealingly connected with a sliding plug (10), the sliding plug (10) is installed with a pushing mechanism for pushing the sliding plug (10) to move, the condenser pipe (6) is communicated with the liquid storage groove (8) and is provided with a liquid return pipe (24); The pushing mechanism comprises a rack (19) slidingly connected to the inner wall of a transmission groove (13), and the rack (19) is matched with an incomplete gear (14), the rack (19) is fixedly connected with the sliding plug (10) through a push rod (11), and the rack (19) is fixedly connected with a push plate (20) at an end away from the push rod (11), and the push plate (20) is connected to the inner wall of the transmission groove (13) through an elastic spring (21); A plurality of heat-conducting fins (26) are fixedly connected to the sidewall of the condenser pipe (6), and the heat-conducting fins (26) penetrate the sidewall of the box (5) and extend to the lower side of the box (5); a one-way air inlet (27) is formed in the bottom of the sliding groove (9), the base (1) is installed with a one-way air outlet pipe (28) communicated with the inside of the sliding groove (9), a plurality of air outlet holes (29) are formed in the sidewall of the one-way air outlet pipe (28), and each air outlet hole (29) faces the heat-conducting fin (26).

2. The process of claim 1, wherein, The upper end of the box (5) is fixedly connected with two baffles (7), and the two baffles (7) are symmetrically arranged along the center of the box (5).

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