Tin bronze centrifugal casting device and method

Abstract

The invention relates to the technical field of centrifugal casting, and discloses a tin bronze centrifugal casting device and method.The centrifugal casting device comprises a centrifugal casting machine, one end of the centrifugal casting machine is provided with a secondary casting ladle used for casting tin bronze molten slurry, and the secondary casting ladle is internally provided with a slurry breaking mechanism used for separating the tin bronze molten slurry; a nitrogen injection mechanism for introducing nitrogen into the molten slurry is arranged in the flowing direction of the tin bronze molten slurry in the second casting ladle; through precise rotation of the slurry breaking mechanism, the amount of tin bronze molten slurry flowing into the centrifugal inner mold can be strictly controlled, it is ensured that the amount of molten slurry cast every time meets the preset requirement, and therefore the precision and consistency of castings are improved, in the rotating process of the slurry breaking plate, impurities above the molten slurry can be effectively prevented from entering the centrifugal inner mold, and the casting quality is improved. And the purity of the casting part is ensured.

Description

Technical Field

[0001] The invention relates to the field of centrifugal casting, and more particularly to a tin bronze centrifugal casting device and method. Background Art

[0002] Tin bronze has good wear resistance and corrosion resistance and is widely used in various valve bodies, pipe fittings, and bearings. However, due to the low melting point of tin, which is much different from the melting point of copper, macro-segregation and reverse segregation are very likely to occur during normal smelting and molding processes. Therefore, smelting and casting are very difficult. In addition, the comprehensive performance of tin bronze castings prepared by conventional methods is average, which seriously restricts the application of tin bronze.

[0003] When the tin bronze slurry is added into the centrifugal casting machine, its liquid surface will directly contact with the oxygen in the air, thus causing an oxidation reaction. This is a natural chemical reaction between metal and oxygen at high temperature, which will cause an oxide layer to form on the metal surface. The oxide enters the mold and is more likely to adhere to the mold, thus causing defects in the workpiece. For this reason, we propose a tin bronze centrifugal casting device and method. Summary of the invention

[0004] The present invention provides a tin bronze centrifugal casting device and method, which solve the technical problem in the related art that oxides enter the mold and are more likely to adhere to the mold, thereby causing defects in the workpiece. In particular, during the centrifugal casting of tin bronze, nitrogen is introduced into the tin bronze slurry, which produces more impurities. The impurities on the surface of the slurry greatly increase the defective rate of the tin bronze castings.

[0005] A first aspect of the present invention provides a tin bronze centrifugal casting device, comprising a centrifugal casting machine, a second-pass pouring ladle for pouring tin bronze molten slurry is provided at one end of the centrifugal casting machine, a slurry breaking mechanism for separating the tin bronze molten slurry is provided inside the second-pass pouring ladle, and a nitrogen blowing mechanism for introducing nitrogen into the molten slurry is provided in the direction where the tin bronze slurry flows in the second-pass pouring ladle; The slurry-breaking mechanism includes a slurry-breaking plate and an auxiliary slurry-discharging plate. Both the slurry-breaking plate and the auxiliary slurry-discharging plate are rotatably arranged on the inner wall of the second-pass pouring ladle. When the slurry pouring in the centrifugal casting machine reaches a preset value, the slurry-breaking plate is pulled out by a control component to separate the slurry in the second-pass pouring ladle. The auxiliary slurry-discharging plate is driven by a driving component to rotate as the slurry liquid level above the slurry-breaking plate drops. The nitrogen injection mechanism includes a ceramic column and a nitrogen supply component. A plurality of injection holes are provided on the lower surface of the ceramic column. Before the pulp breaking plate is rotated out, nitrogen is injected into the ceramic column through the nitrogen supply component. The nitrogen bubbles ejected from the plurality of injection holes flow from bottom to top in the molten slurry, and after bringing the impurities in the molten slurry to the molten slurry surface, they are discharged as the auxiliary pulp discharge plate rotates out.

[0006] Furthermore, a centrifugal inner mold is provided for internal rotation of the centrifugal casting machine, and a plurality of driving wheels are provided on the side of the centrifugal inner mold, the driving wheels are connected to a motor, and the driving wheels are driven to rotate by the motor, and the centrifugal inner mold is driven to rotate by the tangency between the driving wheels and the centrifugal inner mold, so that the tin bronze slurry poured in the centrifugal inner mold is evenly covered on the inner wall of the centrifugal inner mold.

[0007] Furthermore, a slurry outlet is provided on one side of the second-pass ladle close to the auxiliary slurry discharge plate, and a side close to the slurry outlet is fixedly connected to the ladle body, and the ladle body and the second-pass ladle are interconnected. A residual slurry discharge plate fixedly connected to the second-pass ladle is provided below the slurry outlet, and the residual slurry discharge plate passes through the ladle body. The ladle body is assembled and connected to the feeding port of the centrifugal casting machine, and a slurry stirring motor is installed in the bottom of the ladle body. A stirring middle column is meshed and connected to the slurry stirring motor, and two stirring shafts are provided on the stirring middle column.

[0008] Furthermore, the control part includes an electromagnet fixedly connected to the second pouring ladle, a column pulling wire and a plate pulling wire are fixedly arranged on the telescopic column of the electromagnet, a tension column is fixedly arranged on the end of the column pulling wire away from the electromagnet, and the breaking plate and the tension column form an angle of ninety degrees.

[0009] Furthermore, a limiting groove is provided on the outer wall of the second ladle below the tension column, and a wire hole is provided below the limiting groove. The column pulling wire passes through the wire hole and is connected to the tension column, and the column pulling wire presents an inverted V-shaped structure. The limiting groove does not pass through the wall panel of the second ladle.

[0010] Furthermore, an end of the drawing wire away from the electromagnet passes through a chassis of the centrifugal casting machine and is provided with a transmission part, the transmission part includes a bearing plate, a belt pulley is rotatably provided inside the bearing plate, a follow-up head is fixedly provided on the side of the driving wheel close to the belt pulley, a slidingly connected telescopic head is passed through the interior of the belt pulley, an end of the telescopic head away from the follow-up head is fixedly connected to a push plate, a Z-shaped seesaw is rotatably provided on the side wall of the bearing plate, an end of the seesaw away from the push plate is fixedly connected to the drawing wire, and an end of the seesaw close to the push plate is connected to the push plate through a wire.

[0011] Furthermore, the pulp inlet of the auxiliary pulp discharge plate is a pulp discharge inlet on an inclined surface, the pulp outlet of the auxiliary pulp discharge plate is an outflow outlet, and both ends of the auxiliary pulp discharge plate are connected with driving members, the driving member includes a rotating column, a reset coil spring is fixedly arranged inside the rotating column, a winding belt is wound around the outer wall of the rotating column, and the end of the winding belt away from the rotating column is connected to the winding wheel.

[0012] Furthermore, the nitrogen supply component includes a nitrogen pipe interconnected with the interior of the ceramic column, the air inlet end of the nitrogen pipe is connected to a control valve through a hose, and the air inlet end of the control valve is connected to an external nitrogen supply pump body.

[0013] Furthermore, a blocking column is slidably arranged inside the control valve, a spring is fixedly arranged inside the blocking column, and an extrusion head penetrating the blocking column is fixedly connected to one end of the blocking column away from the spring.

[0014] A second aspect of the present invention provides a method for using a tin bronze centrifugal casting device, comprising the following steps: S1. The ladle body filled with tin-bronze slurry is hoisted to the feeding port of the centrifugal casting machine. During the hoisting of the ladle body, the stirring shaft is driven by the stirring motor to stir the tin-bronze slurry. At the same time, nitrogen is injected into the tin-bronze slurry through the stirring shaft. The second ladle is inserted into the feeding port of the centrifugal casting machine, and the drawing wire and the winding belt are tied manually. Open the connecting valve between the secondary ladle and the ladle body, flow a larger amount of tin-bronze slurry than required into the secondary ladle, start the nitrogen injection mechanism, and inject nitrogen into the slurry through the ceramic column to remove hydrogen and refine; S2. After the refining is completed, the electromagnet is controlled to work, so that the telescopic column retracts, and the tension column is pulled by the column wire, thereby driving the slurry cutting plate to rotate 85 degrees, dividing the slurry into two parts, the upper and the lower parts; S3, opening the valve between the secondary pouring ladle and the centrifugal inner mold, allowing the slurry to flow into the centrifugal inner mold, the motor drives the driving wheel to rotate, and then drives the centrifugal inner mold to rotate at a high speed, and the slurry is evenly distributed on the inner wall of the centrifugal inner mold through centrifugal force; S4. While the slurry flows into the centrifugal inner mold, the slurry and impurities above the slurry breaking plate flow into the residual slurry discharge plate through the slurry discharge inlet and outlet, and finally flow into the ladle body for recovery.

[0015] The beneficial effects of the present invention are: The present invention can strictly control the amount of tin-bronze molten slurry flowing into the centrifugal inner mold through the precise rotation of the slurry-breaking mechanism, ensuring that the amount of molten slurry in each casting meets the preset requirements, thereby improving the accuracy and consistency of the casting. During the rotation process, the slurry-breaking plate can effectively prevent impurities above the molten slurry from entering the centrifugal inner mold, thereby ensuring the purity of the casting. The nitrogen injection of the nitrogen injection mechanism can effectively remove hydrogen and other gas impurities in the tin-bronze molten slurry, improve the purity and quality of the molten slurry, and produce a strong stirring effect when the nitrogen bubbles float up and burst in the molten slurry, which helps to refine the grains in the molten slurry and improve the mechanical properties and surface quality of the casting. The nitrogen bubbles can also bring the fine slag inclusions in the molten slurry to the liquid surface and discharge them with the molten slurry, further reducing the inclusions in the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the two-pass pouring ladle of the present invention; Figure 3It is a schematic diagram of the internal structure of the second-stage pouring ladle of the present invention; Figure 4 It is a schematic diagram of the structure of the auxiliary pulp discharge plate of the present invention; Figure 5 It is a schematic diagram of the structure of the ceramic column of the present invention; Figure 6 The present invention Figure 5 The enlarged schematic diagram at A in the middle; Figure 7 It is a schematic diagram of the overall main structure of the present invention; Figure 8 The present invention Figure 7 The enlarged schematic diagram of point B in the middle; Fig. 9 This is a schematic diagram of the structure of the initial state of the broken pulp plate of the present invention; Fig.10 It is a schematic structural diagram of the auxiliary pulp discharge plate of the present invention in a rotated-out state; Fig.11 It is a schematic diagram of the final structure of the auxiliary pulp discharge plate and the pulp cutting plate of the present invention; Fig.12 It is a schematic diagram of the assembly structure of the ladle body and the centrifugal casting machine of the present invention.

[0017] In the figure: 11, centrifugal casting machine; 12, second ladle; 13, residual pulp plate; 14, driving wheel; 15, centrifugal inner mold; 2, pulp cutting mechanism; 21, pulp cutting plate; 22, tension column; 23, limit groove; 24, winding belt; 25, column pulling wire; 26, electromagnet; 27, auxiliary pulp plate; 28, outflow port; 29, rotating column; 201, reset coil spring; 202, wire hole; 203, pulp discharge inlet; 3, nitrogen blowing mechanism; 31, ceramic column; 32, nitrogen pipe; 33, control valve; 34, blocking column; 35, spring; 36, extrusion head; 41, winding wheel; 42, telescopic head; 43, rotating head; 44, push plate; 45, seesaw; 46, plate pulling wire; 47, bearing plate; 5, ladle body; 52, stirring motor; 53, stirring shaft; 54, stirring column. DETAILED DESCRIPTION

[0018] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0019] like Figure 1 , Figure 2 and Figure 3As shown, the first aspect of the present invention provides a tin bronze centrifugal casting device, comprising a centrifugal casting machine 11, a second-pass pouring ladle 12 for pouring tin bronze molten slurry is provided at one end of the centrifugal casting machine 11, a slurry breaking mechanism 2 for separating the tin bronze molten slurry is provided inside the second-pass pouring ladle 12, and a nitrogen blowing mechanism 3 for introducing nitrogen into the molten slurry is provided in the direction where the tin bronze slurry flows in the second-pass pouring ladle 12; The slurry-breaking mechanism 2 includes a slurry-breaking plate 21 and an auxiliary slurry-discharging plate 27. Both the slurry-breaking plate 21 and the auxiliary slurry-discharging plate 27 are rotatably arranged on the inner wall of the secondary pouring ladle 12. When the slurry pouring in the centrifugal casting machine 11 reaches a preset value, the slurry-breaking plate 21 is pulled out by the control component to separate the slurry in the secondary pouring ladle 12. The auxiliary slurry-discharging plate 27 is driven by the driving component to rotate as the slurry liquid level above the slurry-breaking plate 21 drops. The nitrogen blowing mechanism 3 includes a ceramic column 31 and a nitrogen supply component. A plurality of gas injection holes are provided on the lower surface of the ceramic column 31. Before the pulp breaking plate 21 is rotated out, nitrogen is injected into the ceramic column 31 through the nitrogen supply component. Nitrogen bubbles ejected from the plurality of gas injection holes flow from bottom to top in the molten slurry, and after bringing impurities in the molten slurry to the molten slurry surface, they are discharged as the auxiliary pulp discharge plate 27 rotates out.

[0020] Through the precise rotation of the slurry-breaking mechanism 2, the amount of tin-bronze molten slurry flowing into the centrifugal inner mold 15 can be strictly controlled to ensure that the amount of molten slurry for each casting meets the preset requirements, thereby improving the accuracy and consistency of the casting. During the rotation process, the slurry-breaking plate 21 can effectively prevent impurities above the molten slurry from entering the centrifugal inner mold 15, thereby ensuring the purity of the casting. The nitrogen injection of the nitrogen injection mechanism 3 can effectively remove hydrogen and other gas impurities in the tin-bronze molten slurry, improve the purity and quality of the molten slurry, and when the nitrogen bubbles float up and burst in the molten slurry, a strong stirring effect will be generated, which is helpful to refine the grains in the molten slurry and improve the mechanical properties and surface quality of the casting. The nitrogen bubbles can also bring the fine slag inclusions in the molten slurry to the liquid surface and discharge them with the slurry, further reducing the inclusions in the casting.

[0021] like Figure 1 , Figure 7 and Figure 8 As shown, a centrifugal inner mold 15 is rotatably provided inside the centrifugal casting machine 11, and a plurality of driving wheels 14 are provided on the side of the centrifugal inner mold 15. The driving wheels 14 are connected to a motor, and the driving wheels 14 are driven to rotate by the motor. The centrifugal inner mold 15 is driven to rotate by the tangency between the driving wheels 14 and the centrifugal inner mold 15, so that the tin bronze slurry poured in the centrifugal inner mold 15 is evenly covered on the inner wall of the centrifugal inner mold 15.

[0022] like Figure 2 , Figure 4 , Fig.10 and Fig.12As shown, a slurry outlet is provided on one side of the second-pass ladle 12 near the auxiliary slurry discharge plate 27, and a side near the slurry outlet is fixedly connected to the ladle body 5, and the ladle body 5 and the second-pass ladle 12 are interconnected, and a residual slurry discharge plate 13 fixedly connected to the second-pass ladle 12 is provided below the slurry outlet, and the residual slurry discharge plate 13 penetrates the ladle body 5, and the ladle body 5 is assembled and connected with the feeding port of the centrifugal casting machine 11, and a slurry stirring motor 52 is installed at the bottom of the ladle body 5, and a stirring middle column 54 is meshedly connected to the slurry stirring motor 52, and two stirring shafts 53 are provided on the stirring middle column 54, and the stirring middle column 54 is connected to the slurry stirring motor 52 through a gear set, so as to facilitate the connection of a nitrogen supply pipeline; Two stirring shafts 53 rotate at a certain speed at the bottom of the ladle, and nitrogen is introduced through the pipeline. In the process of nitrogen bubbles floating up and bursting, the gas and fine slag inside the copper liquid are taken away. After the copper liquid is taken out of the furnace, it needs to be sprayed and refined for 5 minutes.

[0023] The present invention uses secondary composite refining, centrifugal casting and heat treatment, and comprises the following steps: Step 1: Carry out component optimization design and determine the optimal component range; Step 2: Add some CuP master alloy at the beginning of smelting for deoxidation and refining, and then add tin after deoxidation; Step 3: After the composition is adjusted to meet the requirements, some CuP master alloy is added for secondary deoxidation refining; Step 4: After the copper liquid is poured into the ladle body 5, it is refined by nitrogen injection to remove hydrogen; Step 5: pouring the copper liquid into the centrifugal inner mold 15 for centrifugal casting, and allowing the casting to solidify rapidly by water cooling; Step 6: Perform high temperature annealing on the casting to stabilize the structure and improve the overall performance.

[0024] First, the ladle body 5 filled with tin-bronze slurry is lifted to the feeding port of the centrifugal casting machine 11, and the second ladle 12 is inserted into the feeding port of the centrifugal casting machine 11. The staff needs to first flow tin-bronze slurry larger than the required amount into the second ladle 12, and nitrogen is blown in the second ladle 12 for dehydrogenation and refining for five minutes. Then, under the control of the staff, the valve between the second ladle 12 and the centrifugal inner mold 15 is opened to allow the tin-bronze slurry to flow into the centrifugal inner mold 15 along the second ladle 12, and the driving wheel 14 is driven by the motor to rotate, and the centrifugal inner mold 15 is driven by the driving wheel 14 to rotate at a high speed. The centrifugal inner mold 15 starts to rotate at a high speed, and the tin-bronze alloy liquid is evenly distributed on the inner wall of the centrifugal inner mold 15 by centrifugal force. Finally, the tin-bronze casting cast by centrifugal casting is quickly cooled and shaped through a water cooling system or other cooling methods.

[0025] like Figure 3 , Figure 8 and Fig. 9As shown, the control component includes an electromagnet 26 fixedly connected to the second-pass pouring ladle 12, and a pull column wire 25 and a pull plate wire 46 are fixedly arranged on the telescopic column of the electromagnet 26. A tension column 22 is fixedly arranged on the end of the pull column wire 25 away from the electromagnet 26. The tension column 22 passes through the wall panel of the second-pass pouring ladle 12 and is fixedly connected to the breaking plate 21, and the breaking plate 21 and the tension column 22 form an angle of ninety degrees.

[0026] A limiting groove 23 is provided on the outer wall of the second ladle 12 below the tension column 22, and a wire hole 202 is provided below the limiting groove 23. The column tie wire 25 passes through the wire hole 202 and is connected to the tension column 22, and the column tie wire 25 has an inverted V-shaped structure. The limiting groove 23 does not pass through the wall panel of the second ladle 12.

[0027] The end of the drawing wire 46 away from the electromagnet 26 passes through the chassis of the centrifugal casting machine 11 and is provided with a transmission part, which includes a bearing plate 47, a belt pulley 41 is rotatably provided inside the bearing plate 47, a follower head 43 is fixedly provided on the side of the driving wheel 14 close to the belt pulley 41, a slidingly connected telescopic head 42 is passed through the inside of the belt pulley 41, and a push plate 44 is fixedly connected to the end of the telescopic head 42 away from the follower head 43, and a Z-shaped seesaw 45 is rotatably provided on the side wall of the bearing plate 47, and the end of the seesaw 45 away from the push plate 44 is fixedly connected to the drawing wire 46, and the end of the seesaw 45 close to the push plate 44 is connected to the push plate 44 through a wire.

[0028] The pulp inlet of the auxiliary pulp discharge plate 27 is an inclined pulp discharge inlet 203, and the pulp outlet of the auxiliary pulp discharge plate 27 is an outflow port 28. Both ends of the auxiliary pulp discharge plate 27 are connected with driving members, and the driving members include a rotating column 29, and a reset coil spring 201 is fixedly arranged inside the rotating column 29. The outer wall of the rotating column 29 is wrapped with a winding belt 24, and the end of the winding belt 24 away from the rotating column 29 is connected to the winding wheel 41.

[0029] After the tin-bronze slurry is dehydrogenated and refined by nitrogen spraying in the secondary ladle 12 for five minutes, while the valve of the secondary ladle 12 is opened, the electromagnet 26 is controlled to work to retract the telescopic column, and the column wire 25 is pulled by the electromagnet 26, and the tension column 22 is pulled by the column wire 25 to rotate the breaking plate 21 by 85 degrees, so that the breaking plate 21 divides the tin-bronze slurry in the secondary ladle 12 into upper and lower parts, and the amount of the tin-bronze slurry below the breaking plate 21 just meets the required amount, which is conducive to reducing the contact between the tin-bronze slurry below the breaking plate 21 and the air; The impurities generated by the nitrogen blowing mechanism 3 during the nitrogen blowing for dehydrogenation refining will float in the tin-bronze molten slurry above the slurry breaking plate 21. The blocking of the slurry breaking plate 21 is beneficial to prevent the impurities from entering the centrifugal inner mold 15. The breaking plate 21 is rotated out, the valve of the second ladle 12 is opened, and the nitrogen supply part stops supplying nitrogen to the breaking plate 21. These three steps are performed simultaneously. Therefore, after the tin-bronze slurry enters the centrifugal inner mold 15, the centrifugal inner mold 15 starts to rotate; The electromagnet 26 works to retract the telescopic column, and at the same time pulls the plate drawing wire 46 through the electromagnet 26, and pulls the seesaw 45 to rotate through the plate drawing wire 46, so that the other end of the seesaw 45 pushes the push plate 44, and the telescopic head 42 is pushed out from the other end of the belt reel 41 through the push plate 44, so that it contacts the follower head 43, and the belt reel 41 is driven to rotate while the driving wheel 14 rotates, and the winding belt 24 is wound, and the rotating column 29 is pulled to rotate by the winding belt 24, and the auxiliary pulp discharge plate 27 is driven to gradually rotate out. At this time, the slurry above the pulp breaking plate 21 flows in through the pulp discharge inlet 203 and the outflow outlet 28, and then flows to the ladle body 5 through the residual pulp discharge plate 13 for recovery; Each time the driving wheel 14 rotates one circle, the belt reel 41 rotates one circle, thereby driving the auxiliary pulp discharge plate 27 to rotate a certain angle until the auxiliary pulp discharge plate 27 is tightly attached to the pulp breaking plate 21. The telescopic head 42 is a soft colloid. When the auxiliary pulp discharge plate 27 is tightly attached to the pulp breaking plate 21, the force of the rotating head 43 pushing the telescopic head 42 is greater than the resistance, and the telescopic head 42 bends and does not continue to rotate. Finally, the electromagnet 26 stops working and all steps return to the initial state.

[0030] like Figure 3 , Figure 5 , Figure 6 and Fig.11 As shown, the nitrogen supply component includes a nitrogen pipe 32 interconnected with the interior of the ceramic column 31, the air inlet end of the nitrogen pipe 32 is connected to a control valve 33 through a hose, and the air inlet end of the control valve 33 is connected to an external nitrogen supply pump body.

[0031] A blocking column 34 is slidably disposed inside the control valve 33 , a spring 35 is fixedly disposed inside the blocking column 34 , and an extrusion head 36 penetrating the blocking column 34 is fixedly connected to one end of the blocking column 34 away from the spring 35 .

[0032] After the tin-bronze slurry is added to the secondary pouring ladle 12, nitrogen is supplied to the ceramic column 31 through the nitrogen supply pump body, and nitrogen is introduced into the tin-bronze slurry through a plurality of jet holes. When nitrogen bubbles float and burst, the gas and fine slag inside the copper liquid are taken away. After the copper liquid is taken out of the furnace, it needs to be sprayed and refined for 5 minutes; The ceramic column 31 can be selected with different lengths according to actual needs until it extends to the bottom of the secondary pouring ladle 12. At the same time, the secondary pouring ladle 12 of different sizes can also be selected according to needs. The control valve 33 is installed in the limiting groove 23. The extrusion head 36 is squeezed by the rotation of the tension column 22, and the blocking column 34 is pushed to slide, thereby blocking the nitrogen and stopping the nitrogen supply.

[0033] A second aspect of the present invention provides a method for using a tin bronze centrifugal casting device, comprising the following steps: S1. The ladle body 5 filled with tin-bronze slurry is hoisted to the feeding port of the centrifugal casting machine 11. During the hoisting of the ladle body 5, the stirring shaft 53 is driven by the stirring motor 52 to stir, and nitrogen is injected into the tin-bronze slurry through the stirring shaft 53. The second-pass ladle 12 is inserted into the feeding port of the centrifugal casting machine 11, and the drawing wire 46 and the winding belt 24 are manually tied. The tying here means that the drawing wire 46 and the winding belt 24 on the second-pass ladle 12 are connected with the drawing wire 46 and the winding belt 24 inside the centrifugal casting machine 11. Open the connecting valve between the secondary ladle 12 and the ladle body 5, flow a larger amount of tin-bronze slurry than required into the secondary ladle 12, start the nitrogen blowing mechanism 3, and blow nitrogen into the slurry through the ceramic column 31 to perform hydrogen removal and refining; S2. After the refining is completed, the electromagnet 26 is controlled to work, so that the telescopic column retracts, and the tension column 22 is pulled by the column pulling wire 25, thereby driving the pulp cutting plate 21 to rotate 85 degrees, and the slurry is divided into two parts, the upper and lower parts; S3, opening the valve between the secondary pouring ladle 12 and the centrifugal inner mold 15, allowing the slurry to flow into the centrifugal inner mold 15, and the motor drives the driving wheel 14 to rotate, thereby driving the centrifugal inner mold 15 to rotate at a high speed, and the slurry is evenly distributed on the inner wall of the centrifugal inner mold 15 by centrifugal force; S4. While the molten slurry flows into the centrifugal inner mold 15, the molten slurry and impurities above the slurry cutting plate 21 flow into the residual slurry discharge plate 13 through the slurry discharge inlet 203 and the outflow port 28, and finally flow into the ladle body 5 for recovery.

[0034] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A centrifugal casting device, comprising a centrifugal casting machine (11), wherein one end of the centrifugal casting machine (11) is provided with a secondary pouring ladle (12) for pouring tin-bronze molten slurry, characterized in that: A slurry-breaking mechanism (2) for separating the tin-bronze molten slurry is provided inside the second-pass pouring ladle (12); a nitrogen blowing mechanism (3) for introducing nitrogen into the molten slurry is provided in the flow direction of the tin-bronze molten slurry in the second-pass pouring ladle (12); The slurry-breaking mechanism (2) comprises a slurry-breaking plate (21) and an auxiliary slurry-discharging plate (27), both of which are rotatably arranged on the inner wall of the second-pass pouring ladle (12). When the slurry pouring in the centrifugal casting machine (11) reaches a preset value, the slurry-breaking plate (21) is pulled out by a control component to separate the slurry in the second-pass pouring ladle (12), and the auxiliary slurry-discharging plate (27) is driven by a driving component to rotate as the slurry level above the slurry-breaking plate (21) drops; The nitrogen injection mechanism (3) comprises a ceramic column (31) and a nitrogen supply member. The lower surface of the ceramic column (31) is provided with a plurality of injection holes. Before the pulp cutting plate (21) is rotated out, nitrogen is injected into the ceramic column (31) through the nitrogen supply member. Nitrogen bubbles ejected from the plurality of injection holes flow from bottom to top in the molten slurry, bringing impurities in the molten slurry to the molten slurry surface, and are discharged as the auxiliary pulp discharge plate (27) rotates out.

2. A centrifugal casting device according to claim 1, characterized in that: A centrifugal inner mold (15) is rotatably disposed inside the centrifugal casting machine (11), and a plurality of drive wheels (14) are disposed on the side of the centrifugal inner mold (15). The drive wheels (14) are connected to a motor, and the motor drives the drive wheels (14) to rotate. The drive wheels (14) and the centrifugal inner mold (15) are tangent to each other, and the centrifugal inner mold (15) is driven to rotate, so that the tin bronze slurry poured into the centrifugal inner mold (15) is evenly covered on the inner wall of the centrifugal inner mold (15).

3. A centrifugal casting device according to claim 1, characterized in that: The second ladle (12) is provided with a slurry outlet on one side close to the auxiliary slurry discharge plate (27), and the side close to the slurry outlet is fixedly connected to the ladle body (5), and the ladle body (5) and the second ladle (12) are interconnected. A residual slurry discharge plate (13) fixedly connected to the second ladle (12) is provided below the slurry outlet, and the residual slurry discharge plate (13) passes through the ladle body (5). The ladle body (5) is assembled and connected to the feeding port of the centrifugal casting machine (11), and a slurry stirring motor (52) is installed at the bottom of the ladle body (5), and a stirring middle column (54) is meshingly connected to the slurry stirring motor (52), and two stirring shafts (53) are provided on the stirring middle column (54).

4. A centrifugal casting device according to claim 1, characterized in that: The control component comprises an electromagnet (26) fixedly connected to the second-pass pouring ladle (12); a column-pulling wire (25) and a plate-pulling wire (46) are fixedly arranged on the telescopic column of the electromagnet (26); a tension column (22) is fixedly arranged on one end of the column-pulling wire (25) away from the electromagnet (26); the tension column (22) passes through the wall panel of the second-pass pouring ladle (12) and is fixedly connected to the slurry-breaking plate (21); and the slurry-breaking plate (21) and the tension column (22) form an angle of ninety degrees.

5. A centrifugal casting device according to claim 4, characterized in that: A limiting groove (23) is provided on the outer wall of the second ladle (12) below the tension column (22), and a wire hole (202) is provided below the limiting groove (23). The column pulling wire (25) passes through the wire hole (202) and is connected to the tension column (22), and the column pulling wire (25) is in an inverted V-shaped structure. The limiting groove (23) does not pass through the wall panel of the second ladle (12).

6. A centrifugal casting device according to claim 4, characterized in that: The end of the drawing wire (46) away from the electromagnet (26) passes through the chassis of the centrifugal casting machine (11) and is provided with a transmission member, the transmission member comprising a bearing plate (47), a belt reel (41) is rotatably provided inside the bearing plate (47), a follower head (43) is fixedly provided on the side of the driving wheel (14) close to the belt reel (41), a slidably connected telescopic head (42) is passed through the inside of the belt reel (41), and a push plate (44) is fixedly connected to the telescopic head (42) at one end away from the follower head (43), and a Z-shaped seesaw (45) is rotatably provided on the side wall of the bearing plate (47), the end of the seesaw (45) away from the push plate (44) is fixedly connected to the drawing wire (46), and the end of the seesaw (45) close to the push plate (44) is connected to the push plate (44) through a wire.

7. A centrifugal casting device according to claim 6, characterized in that: The pulp inlet of the auxiliary pulp discharge plate (27) is a pulp discharge inlet (203) on an inclined surface, and the pulp outlet of the auxiliary pulp discharge plate (27) is an outflow outlet (28). Both ends of the auxiliary pulp discharge plate (27) are connected to a driving member, and the driving member comprises a rotating column (29). A return coil spring (201) is fixedly arranged inside the rotating column (29), and a winding belt (24) is wound around the outer wall of the rotating column (29), and the end of the winding belt (24) away from the rotating column (29) is connected to a winding wheel (41).

8. A centrifugal casting device according to claim 1, characterized in that: The nitrogen supply component comprises a nitrogen pipe (32) interconnected with the interior of the ceramic column (31); an air inlet end of the nitrogen pipe (32) is connected to a control valve (33) via a hose; and an air inlet end of the control valve (33) is connected to an external nitrogen supply pump body.

9. A centrifugal casting device according to claim 8, characterized in that: A blocking column (34) is slidably disposed inside the control valve (33), a spring (35) is fixedly disposed inside the blocking column (34), and an extrusion head (36) penetrating the blocking column (34) is fixedly connected to one end of the blocking column (34) away from the spring (35).

10. A method for using the centrifugal casting device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. A ladle body (5) filled with tin-bronze slurry is hoisted to a feeding port of a centrifugal casting machine (11). During the hoisting of the ladle body (5), a stirring shaft (53) is driven by a stirring motor (52) to stir the tin-bronze slurry. Nitrogen is injected into the tin-bronze slurry through the stirring shaft (53). A second ladle (12) is inserted into the feeding port of the centrifugal casting machine (11). At the same time, the drawing wire (46) and the winding belt (24) are manually tied. Opening the connecting valve between the secondary pouring ladle (12) and the ladle body (5), flowing a tin-bronze slurry greater than the required amount into the secondary pouring ladle (12), starting the nitrogen injection mechanism (3), and injecting nitrogen into the slurry through the ceramic column (31) to perform hydrogen removal and refining; S2, after the refining is completed, the electromagnet (26) is controlled to work, so that the telescopic column is retracted, and the tension column (22) is pulled by the column pulling wire (25), thereby driving the pulp cutting plate (21) to rotate 85 degrees, so as to divide the slurry into two parts, the upper and the lower parts; S3, opening the valve between the secondary pouring ladle (12) and the centrifugal inner mold (15), allowing the molten slurry to flow into the centrifugal inner mold (15), and the motor drives the driving wheel (14) to rotate, thereby driving the centrifugal inner mold (15) to rotate at a high speed, and the molten slurry is evenly distributed on the inner wall of the centrifugal inner mold (15) through centrifugal force; S4. While the molten slurry flows into the centrifugal inner mold (15), the molten slurry and impurities above the slurry cutting plate (21) flow into the residual slurry discharge plate (13) through the slurry discharge inlet (203) and the outflow outlet (28), and finally flow into the ladle body (5) for recovery, and then the ladle body (5) is hoisted to the next centrifugal casting machine (11) position.

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