Casting method of aluminum-tin alloy sliding bearing

Abstract

The invention relates to the technical field of sliding bearing casting, in particular to a casting method for an aluminum-tin alloy sliding bearing, and aluminum-tin alloy sliding bearing casting equipment comprises a mold component and a defoaming component. The mold component comprises an outer mold assembly and a lining assembly rotating in the center of the outer mold assembly, further comprises an adjusting assembly rotating on the lining assembly and connected with the outer mold assembly, and further comprises a bottom support assembly fixed to the outer mold assembly. The trigger assembly and the knocking assembly can be driven to extrude the elastic assembly through the lever assembly, then the trigger assembly can be disconnected from the knocking assembly, the elastic assembly drives the knocking assembly to knock a mold part, and therefore the mold part can be stably knocked during mold pouring, bubbles in melt in the mold part are discharged, and the mold pouring efficiency is improved. And after adjustment of the adjusting assembly, the sliding bearing in the mold part can be demolded through the bubble removing part.

Description

Technical Field

[0001] The invention relates to the technical field of sliding bearing casting, in particular to a casting method for an aluminum-tin alloy sliding bearing. Background Art

[0002] Sliding bearings are bearings that work under sliding friction. Sliding bearings work smoothly, reliably and without noise. Under liquid lubrication conditions, the sliding surfaces are separated by lubricating oil without direct contact, which can also greatly reduce friction loss and surface wear. The oil film also has a certain vibration absorption ability.

[0003] In the traditional casting method of sliding bearings, there are a series of challenges and limitations that affect the production efficiency and product quality of the bearings. The degassing operation is usually relatively extensive, and it is difficult to completely remove the gas in the alloy, resulting in internal defects in the casting, so improvements are needed. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above-mentioned problem or the problem in the prior art that it is difficult to completely remove the gas in the alloy during the casting of the sliding bearing, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a casting method for an aluminum-tin alloy sliding bearing.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: S1: raw material preparation: select aluminum and tin with high purity as the main raw materials, and determine the alloy component ratio according to the design requirements; S2: smelting: smelt the raw materials in a special smelting equipment, control the smelting temperature and time, and ensure uniform alloy composition; S3: degassing and deslagging: degassing and deslagging operations are performed during the smelting process, and suitable degassing agents and deslagging agents are used to remove gas and impurities in the alloy; S4: mold parts: prepare the above for casting sliding bearings Mold component, the mold component adopts a cooling water circulation crystallizer structure, and the center of the mold component adopts a mud core shape; S5: pouring: pouring the smelted alloy liquid into the mold component through the upper casting method, and controlling the pouring speed and temperature; S6: cooling and solidification: after pouring, water cooling is carried out to make the casting solidify rapidly from bottom to top; S7: demoulding: after the bearing casting is completely solidified, the demoulding operation is carried out to take out the formed bearing casting; S8: post-processing: the demoulded bearing casting is subjected to necessary post-processing to improve the performance of the bearing.

[0008] As a preferred solution of the casting method of the aluminum-tin alloy sliding bearing of the present invention, the casting equipment for the aluminum-tin alloy sliding bearing includes a mold part and a defoaming part; the mold part includes an outer mold component, and a lining component rotating at the center of the outer mold component, and also includes an adjusting component rotating on the lining component, the adjusting component is connected to the outer mold component, and also includes a base component fixed on the outer mold component, and a mold for processing the sliding bearing is formed by the outer mold component, the lining component and the base component; the defoaming part includes a knocking component sliding on the bottom of the base component, and an elastic component sliding on the inner wall of the lining component, the knocking component and the elastic component are adapted to each other, and also includes a trigger component adapted to the outer wall of the knocking component, and also includes a lever component rotating on the outer wall of the trigger component, through which the trigger component and the knocking component can be driven to extrude the elastic component, and then the trigger component will release the connection with the knocking component, so that the elastic component drives the knocking component to knock on the base component, so that the bubbles in the material can be reduced when pouring the mold.

[0009] As a preferred solution of the casting method of the aluminum-tin alloy sliding bearing of the present invention, the outer mold assembly includes a support seat, a containing tube fixed at the center of the support seat, and a cooling tube fixed in the gap of the containing tube.

[0010] As a preferred solution of the casting method of the aluminum-tin alloy sliding bearing of the present invention, the lining assembly includes a hollow tube fixed to the inner wall of the bottom end of the support seat, the outer wall of the hollow tube is provided with a slide groove, the outer wall of the hollow tube is provided with an L-shaped groove corresponding to the top of the slide groove, and a lining rod rotating on the top of the hollow tube.

[0011] As a preferred solution of the casting method of the aluminum-tin alloy sliding bearing of the present invention, the adjusting component includes an arc-shaped bar fixed to the inner wall of the bottom end of the outer mold component corresponding to the lining component, the top two ends of the arc-shaped bar are provided with grooves, and an adjusting rod is arranged in the groove on one side, and the adjusting rod is connected to the lining component.

[0012] As a preferred solution of the casting method of the aluminum-tin alloy sliding bearing of the present invention, the bottom support assembly includes an outer tube fixed to the bottom of the outer mold assembly, and a bottom support ring sliding on the inner wall of the outer tube, the outer wall of the bottom support ring is adapted to the inner wall of the outer mold assembly, and also includes a slider fixed to the bottom of the bottom support ring, and the slider is adapted to the lining assembly.

[0013] As a preferred scheme of the casting method of the aluminum-tin alloy sliding bearing of the present invention, the knocking component includes a circular ring movably connected to the outer wall of the lining component corresponding to the bottom of the base component, movable grooves are provided on both sides of the inner wall of the circular ring, a through groove is provided inside the inner wall of the circular ring corresponding to the movable groove, a clamping groove is provided adjacent to the movable groove on the outer wall of the circular ring corresponding to the movable groove, an inclined edge is provided at the bottom of the circular ring corresponding to the bottom of the clamping groove, and a connecting rod is fixed to the top of the circular ring, and the top of the connecting rod passes through the inside of the base component and is fixedly connected to a top ring.

[0014] As a preferred solution of the casting method of the aluminum-tin alloy sliding bearing of the present invention, the elastic component includes a transmission plate sliding inside the hollow tube, and a No. 1 spring fixed between the transmission plate and the hollow tube, and also includes a triangular plate fixed in the corresponding slide groove on the outer wall of the transmission plate.

[0015] As a preferred scheme of the casting method of the aluminum-tin alloy sliding bearing of the present invention, wherein: the trigger component includes a movable ring movably connected to the outer wall of the lining component corresponding to the bottom of the knocking component, and a device shell fixed to the outer wall of the movable ring corresponding to the bottom of the inclined edge, and also includes a driving block sliding on the inner wall of the bottom end of the device shell, and also includes a No. 1 triangle block fixed to the bottom of the driving block corresponding to the bottom of the device shell, and also includes a No. 2 spring fixed between the driving block and the device shell, and also includes two vertical plates rotating inside the device shell corresponding to the top of the driving block, the vertical plates are connected to the driving block, and also include a clamping block rotating on the top of the two vertical plates, and also includes a No. 2 triangle block fixed to the outer wall of the lining component corresponding to the bottom of the No. 1 triangle block.

[0016] As a preferred solution of the casting method of the aluminum-tin alloy sliding bearing of the present invention, the lever assembly includes a fixed seat fixed on the outer mold assembly, and a cocking rod rotating on the top of the fixed seat, and also includes a transmission rod rotating on the end of the cocking rod, and the transmission rod is connected to a movable ring.

[0017] The beneficial effects of the casting method of the aluminum-tin alloy sliding bearing of the present invention are as follows: the present invention can drive the trigger component and the knocking component to extrude the elastic component through the lever component, and then the trigger component will release the connection with the knocking component, so that the elastic component drives the knocking component to knock on the mold component, that is, when pouring the mold, the mold component can be knocked stably to discharge the bubbles in the molten liquid inside the mold component, and after adjustment by the adjustment component, the degassing component can also demold the sliding bearing in the mold component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is an overall schematic diagram of the casting method of aluminum-tin alloy sliding bearing.

[0020] Figure 2 This is a schematic diagram of the mold component structure in the casting method of aluminum-tin alloy sliding bearings.

[0021] Figure 3 It is a schematic diagram of the structure of the degassing components in the casting method of the aluminum-tin alloy sliding bearing.

[0022] Figure 4 The present invention is a schematic diagram of the structure of the outer mold component in the casting method of the aluminum-tin alloy sliding bearing.

[0023] Figure 5 The present invention is a schematic diagram of the structure of the lining component and the adjusting component in the casting method of the aluminum-tin alloy sliding bearing.

[0024] Figure 6 The figure is a schematic diagram of the structure of the bottom support assembly in the casting method of the aluminum-tin alloy sliding bearing.

[0025] Figure 7 It is a schematic diagram of the partial structure of the striking component and the elastic component in the casting method of the aluminum-tin alloy sliding bearing.

[0026] Figure 8 It is a schematic diagram of the local structure of the defoaming component in the casting method of the aluminum-tin alloy sliding bearing.

[0027] Fig. 9 It is a schematic diagram of the structure of the lever assembly in the casting method of the aluminum-tin alloy sliding bearing.

[0028] Fig.10 for Fig. 9 Schematic diagram of the structure of part A.

[0029] In the figure: 100, mold component; 101, outer mold assembly; 102, lining assembly; 103, adjustment assembly; 104, bottom support assembly; 101a, support base; 101b, accommodation tube; 101c, cooling tube; 102a, hollow tube; 102b, slide groove; 102c, L-shaped groove; 102d, lining rod; 103a, arc-shaped strip; 103b, groove; 103c, adjustment rod; 104a, outer tube; 104b, bottom supporting ring; 104c, slider; 200, defoaming component; 201, knocking component; 202, elastic component; 203, trigger component; 204, lever component; 201a, circular ring; 201b, movable groove; 201c, through groove; 201d, clamping groove; 201e, inclined edge; 201f, connecting rod; 201g, top ring; 202a, transmission plate; 202b, spring No. 1; 202c, triangle plate; 203a, movable ring; 203b, device shell; 203c, driving block; 203d, triangle block No. 1; 203e, spring No. 2; 203f, vertical plate; 203g, clamping block; 203h, triangle block No. 2; 204a, a fixing seat; 204b, a tilting rod; 204c, a transmission rod. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Embodiment 1 is the first embodiment of the present invention, which provides a casting method of an aluminum-tin alloy sliding bearing, which can produce high-quality sliding bearings, and comprises: S1: raw material preparation: selecting aluminum and tin with high purity as main raw materials, and determining the alloy component ratio according to design requirements; S2: Melting: Melt the raw materials in a special melting equipment, control the melting temperature and time to ensure uniform alloy composition; S3: Degassing and slag removal: Degassing and slag removal operations are carried out during the smelting process, and suitable degassing agents and deslag removal agents are used to remove gases and impurities in the alloy; S4: mold component 100: prepare a mold component 100 for casting a sliding bearing, the mold component 100 adopts a cooling water circulation crystallizer structure, and the center of the mold component 100 adopts a mud core molding; S5: Pouring: pouring the smelted alloy liquid into the mold component 100 by upper casting method, and controlling the pouring speed and temperature; S6: Cooling and solidification: After pouring, water cooling is carried out to make the casting solidify rapidly from bottom to top; S7: demoulding: after the bearing casting is completely solidified, demoulding operation is performed to take out the formed bearing casting; S8: Post-processing: Perform necessary post-processing on the bearing casting after demoulding to improve the performance of the bearing.

[0034] When in use, high-purity aluminum and tin are selected as the main raw materials to ensure that the alloy has excellent physical and chemical properties. The alloy composition ratio is determined according to the design requirements. This step is to meet the specific performance requirements of the sliding bearing. The smelting is carried out in a special smelting equipment, which can provide a stable high-temperature environment to ensure the full melting of the raw materials, control the smelting temperature and time, make the alloy components evenly distributed, and avoid the occurrence of segregation. During the smelting process, suitable degassing agents and slag removers are added. These additives can react with the gas and impurities in the alloy to generate products that are easy to remove. Through specific process operations, such as stirring, standing, etc., the gas and impurities are separated from the alloy to ensure the purity of the alloy. Prepare a mold for casting sliding bearings. The mold has a cooling water circulation crystallizer structure, which can realize the sequential solidification of the casting. The center of the mold adopts mud core molding. This molding method can make the casting have good yield during the cooling and shrinkage process to avoid the casting from being pulled apart. The smelted alloy liquid is poured into the mold by the upper casting method. The upper casting method can ensure that the alloy liquid enters the mold smoothly, avoids turbulence and splashing, controls the pouring speed and temperature to ensure that the alloy liquid can fully fill the mold and avoid defects. The poured alloy liquid is cooled and solidified in the mold. The cooling water circulation crystallizer structure of the mold can accelerate the solidification process of the alloy liquid and realize the sequential solidification of the casting. The sequential solidification helps to reduce the stress concentration and defects inside the casting and improve the quality of the casting. After the bearing casting is completely solidified, the demoulding operation is performed. During the demoulding process, it is necessary to ensure that the casting is not damaged and maintain its integrity. The necessary post-processing is performed on the demoulding bearing casting, such as cleaning the surface burrs and performing heat treatment. Cleaning the surface burrs can remove impurities and uneven parts on the surface of the casting and improve the appearance quality of the casting. Heat treatment can improve the internal structure and performance of the casting, such as improving hardness and wear resistance.

[0035] In summary, through the various steps and working principles of the above casting method, high-quality sliding bearings can be produced. This method not only has high reliability and stability, but also can meet the specific performance requirements of different sliding bearings. In practical applications, this method has been widely verified and applied, and has achieved good results.

[0036] Example 2, reference Figures 1 to 10 , which is the second embodiment of the present invention, provides a mold component 100 and a defoaming component 200 for a casting method of an aluminum-tin alloy sliding bearing, which has the effect of defoaming and demolding the molten metal in the mold, and includes: an aluminum-tin alloy sliding bearing casting device includes a mold component 100 and a defoaming component 200; The mold part 100 includes an outer mold component 101, and an inner lining component 102 rotating at the center of the outer mold component 101, and also includes an adjustment component 103 rotating on the inner lining component 102, the adjustment component 103 is connected to the outer mold component 101, and also includes a base component 104 fixed on the outer mold component 101. The outer mold component 101, the inner lining component 102 and the base component 104 form a mold for processing sliding bearings.

[0037] Specifically, the debubble component 200 includes a knocking component 201 that slides on the bottom of the base component 104, and an elastic component 202 that slides on the inner wall of the lining component 102. The knocking component 201 and the elastic component 202 are adapted to each other, and also include a trigger component 203 adapted to the outer wall of the knocking component 201, and also include a lever component 204 that rotates on the outer wall of the trigger component 203. The lever component 204 can drive the trigger component 203 and the knocking component 201 to squeeze the elastic component 202, and then the trigger component 203 will release the connection with the knocking component 201, so that the elastic component 202 drives the knocking component 201 to knock on the base component 104, so as to reduce bubbles in the material when pouring the mold.

[0038] Further, such as Figure 4 In the figure, the outer mold assembly 101 includes a support base 101a, and a containing tube 101b fixed at the center of the support base 101a, and also includes a cooling tube 101c fixed in the gap of the containing tube 101b. By connecting the inlet and outlet at both ends of the cooling tube 101c with the water inlet pipe and the water outlet pipe, the heat of the containing tube 101b can be taken away by the cooling tube 101c during operation, thereby cooling the sliding bearing inside the containing tube 101b.

[0039] Further, such as Figure 5In the figure, the lining assembly 102 includes a hollow tube 102a fixed to the inner wall of the bottom end of the support seat 101a, the outer wall of the hollow tube 102a is provided with a slide groove 102b, and there are two slide grooves 102b, which are located on both sides of the hollow tube 102a, and the outer wall of the hollow tube 102a is provided with an L-shaped groove 102c corresponding to the top of the slide groove 102b, and a lining rod 102d rotating on the top of the hollow tube 102a, and the connection between the hollow tube 102a and the lining rod 102d is provided with a heat insulation layer to prevent the lining rod 102d from affecting the rotation of the hollow tube 102a and the lining rod 102d during mold casting.

[0040] Further, such as Figure 5 In the figure, the adjusting component 103 includes an arc-shaped strip 103a fixed on the inner wall of the bottom end of the outer mold component 101 corresponding to the lining component 102, the arc-shaped strip 103a is fixed on the inner wall of the bottom end of the support seat 101a in the outer mold component 101 corresponding to the hollow tube 102a in the lining component 102, grooves 103b are provided at both ends of the top of the arc-shaped strip 103a, and an adjusting rod 103c is provided in the groove 103b on one side, the adjusting rod 103c is connected to the lining component 102, and the adjusting rod 103c is rotatably connected to the outer wall of the hollow tube 102a in the lining component 102.

[0041] Further, such as Figure 6 In the figure, the bottom support assembly 104 includes an outer tube 104a fixed at the bottom of the outer mold assembly 101, the outer tube 104a is fixed at the bottom of the accommodating tube 101b in the outer mold assembly 101, and a bottom support ring 104b sliding on the inner wall of the outer tube 104a, the outer wall of the bottom support ring 104b is adapted to the inner wall of the outer mold assembly 101, the bottom support ring 104b is adapted to the accommodating tube 101b in the outer mold assembly 101, and also includes a slider 104c fixed at the bottom of the bottom support ring 104b, the slider 104c is adapted to the lining assembly 102, the slider 104c slides inside the L-shaped groove 102c in the lining assembly 102, and in the initial state, the slider 104c is located at the bottom limit end of the L-shaped groove 102c.

[0042] Further, such as Figure 7 , 810, the striking component 201 includes a ring 201a movably connected to the outer wall of the lining component 102 corresponding to the bottom of the bottom support component 104, the ring 201a is movably connected to the outer wall of the hollow tube 102a in the lining component 102 corresponding to the bottom of the bottom support component 104, and the inner wall of the ring 201a is provided with movable grooves 201b on both sides, and the inner wall of the ring 201a corresponds to the movable groove 201b and the inner wall of the ring 201a is provided with a through groove 201c. A slot 201d is provided adjacent to 01b, and an inclined edge 201e is provided at the bottom of the ring 201a corresponding to the bottom of the slot 201d, and a connecting rod 201f is fixed to the top of the ring 201a. The top of the connecting rod 201f passes through the inside of the bottom support assembly 104 and is fixedly connected with a top ring 201g. The connecting rod 201f passes through the inner wall of the bottom support ring 104b in the bottom support assembly 104, and the top ring 201g slides on the inner wall of the bottom support ring 104b.

[0043] Further, such as Figure 7 , 8 In the figure, the elastic component 202 includes a transmission plate 202a that slides inside the hollow tube 102a, and a spring 202b fixed between the transmission plate 202a and the hollow tube 102a, and also includes a triangular plate 202c fixed in the corresponding sliding groove 102b on the outer wall of the transmission plate 202a, and the triangular plate 202c is located inside the movable groove 201b.

[0044] Further, such as Fig. 9 , 10 In the embodiment, the trigger assembly 203 includes a movable ring 203a movably connected to the outer wall of the lining assembly 102 corresponding to the bottom of the knocking assembly 201, the movable ring 203a is movably connected to the outer wall of the hollow tube 102a in the lining assembly 102, and a device shell 203b fixed to the outer wall of the movable ring 203a corresponding to the bottom of the inclined edge 201e, and also includes a driving block 203c sliding on the inner wall of the bottom end of the device shell 203b, and also includes a No. 1 triangular block 203d fixed at the bottom of the driving block 203c corresponding to the bottom of the device shell 203b, and also includes a No. 2 spring 203e fixed between the driving block 203c and the device shell 203b, and also includes a rotating driving block 203c corresponding to the inside of the device shell 203b. There are two vertical plates 203f at the top of the block 203c, and the vertical plates 203f are connected to the driving block 203c. The vertical plates 203f and the driving block 203c are movably connected, so that when the driving block 203c moves, it will drive the vertical plates 203f to rotate on the equipment shell 203b. It also includes a block 203g rotating on the top of the two vertical plates 203f, and the end of the block 203g has an inclined end, and the inclined end of the block 203g is adapted to the inclined edge 201e. It also includes a No. 2 triangle block 203h fixed on the outer wall of the lining component 102 corresponding to the bottom of the No. 1 triangle block 203d, and the No. 2 triangle block 203h is fixed on the outer wall of the hollow tube 102a in the lining component 102.

[0045] Further, such as Fig. 9 In the figure, the lever assembly 204 includes a fixed seat 204a fixed on the outer mold assembly 101, the fixed seat 204a is fixed on the inner wall of the bottom end of the support seat 101a in the outer mold assembly 101 corresponding to the outer side of the hollow tube 102a, and a tilting rod 204b rotating on the top of the fixed seat 204a, and also includes a transmission rod 204c rotating on the end of the tilting rod 204b, the transmission rod 204c is connected to the movable ring 203a, and the transmission rod 204c and the movable ring 203a are rotatably connected.

[0046] When in use, by pouring molten aluminum-tin metal into the tubular mold composed of the accommodating tube 101b, the lining rod 102d and the bottom supporting ring 104b, the worker presses the tilting rod 204b to drive the transmission rod 204c, the movable ring 203a, the equipment shell 203b, the vertical plate 203f, and the block 203g to move downward. Since the block 203g is inside the slot 201d, the block 203g will drive the circular ring 201a, the connecting rod 201f, and the top ring 201g to move downward. In this process, the movable slot 201b of the circular ring 201a will squeeze the triangular plate 202c, the transmission plate 202a, and the No. 1 spring 202b for compression, and the top ring 201g will Move from the top to the bottom of the bottom support ring 104b. When the No. 1 triangle block 203d in the trigger assembly 203 moves downward and contacts the No. 2 triangle block 203h, the No. 1 triangle block 203d will be squeezed by the No. 2 triangle block 203h and move inward, so that the No. 1 triangle block 203d will drive the driving block 203c to squeeze the No. 2 spring 203e, and the driving block 203c will also drive the two vertical plates 203f to move inward, so that the two vertical plates 203f will rotate inside the device shell 203b at the same time, so that the block 203g on the top of the two vertical plates 203f will slowly disengage from the slot 201d. In this process, the rotation of the vertical plate 203f will also drive the block When the block 203g is completely out of the slot 201d, the ring 201a is out of the limit of the block 203g. At this time, the No. 1 spring 202b can rebound and drive the transmission plate 202a and the triangular plate 202c to act on the movable slot 201b. As a result, the ring 201a will drive the connecting rod 201f and the top ring 201g upward to knock the inner wall of the top of the bottom supporting ring 104b, thereby removing bubbles from the sliding bearing poured inside the mold part 100. Then, the worker lifts the lever assembly 204 to drive the trigger assembly 204 to release the air bubbles. The block 203 moves upward until the inclined end of the end of the card block 203g contacts the inclined edge 201e, the card block 203g will be squeezed and drive the two vertical plates 203f to rotate outward, thereby the vertical plate 203f will drive the driving block 203c to squeeze the second spring 203e, and when one end of the card block 203g reaches the inside of the card slot 201d, the second spring 203e will drive the driving block 203c, the vertical plate 203f, and the card block 203g to be stuck in the inside of the card slot 201d, so that it can be recycled according to the above principle, and the mold component 100 is continuously knocked, and the strength of each knock is not much different, so as to prevent the aluminum-tin metal melt from spilling out of the mold component 100; When it is necessary to demould the sliding bearing in the mold component 100, the adjusting rod 103c is lifted to disengage the adjusting rod 103c from the groove 103b. At this time, the adjusting rod 103c drives the hollow tube 102a to rotate, so that the vertical end of the L-shaped groove 102c on the outer wall of the hollow tube 102a moves to the slider 104c, and the hollow tube 102a drives the triangular plate 202c located in the slide groove 102b to move from the movable groove 201b to the through groove 201c, and the second triangular block 203h is also driven by the hollow tube 102a, and the first triangular block 203h is moved to the through groove 201c. d is offset, and after adjustment, the adjusting rod 103c can be placed in the corresponding groove 103b, and the demoulding mode can be switched at this time. The difference is that the knocking component 201 is separated from the support of the elastic component 202. At this time, the lever component 204 can be fully used to drive the trigger component 203 and the knocking component 201 to knock on the bottom supporting ring 104b. Because the slider 104c on the bottom supporting ring 104b is separated from the limit of the L-shaped groove 102c, the bottom supporting ring 104b can push up the sliding bearing in the accommodating tube 101b, thereby completing the demoulding work with little effort.

[0047] In summary, the lever assembly 204 can drive the trigger assembly 203 and the knocking assembly 201 to squeeze the elastic assembly 202, and then the trigger assembly 203 will release the connection with the knocking assembly 201, so that the elastic assembly 202 drives the knocking assembly 201 to knock on the mold component 100, that is, when pouring the mold, the mold component 100 can be knocked stably to discharge the bubbles in the molten metal inside the mold component 100, and after adjustment by the adjustment assembly 103, the degassing component 200 can also demold the sliding bearing in the mold component 100.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A casting method for an aluminum-tin alloy sliding bearing, characterized in that: include, S1: Raw material preparation: Select aluminum and tin with higher purity as the main raw materials, and determine the alloy composition ratio according to design requirements; S2: Melting: Melting the raw materials in a special melting equipment, controlling the melting temperature and time to ensure uniform alloy composition; S3: Degassing and slag removal: Degassing and slag removal operations are carried out during the smelting process, and suitable degassing agents and deslag removal agents are used to remove gases and impurities in the alloy; S4: mold component (100): prepare the mold component (100) for casting a sliding bearing, the mold component (100) adopts a cooling water circulation crystallizer structure, and the center of the mold component (100) adopts a mud core molding; S5: Pouring: pouring the smelted alloy liquid into the mold component (100) by upper casting method, and controlling the pouring speed and temperature; S6: Cooling and solidification: After pouring, water cooling is carried out to make the casting solidify rapidly from bottom to top; S7: demoulding: after the bearing casting is completely solidified, demoulding operation is performed to take out the formed bearing casting; S8: Post-processing: Perform necessary post-processing on the bearing casting after demoulding to improve the performance of the bearing.

2. The casting method of the aluminum-tin alloy sliding bearing according to claim 1, characterized in that: A casting device for an aluminum-tin alloy sliding bearing comprises a mold component (100) and a defoaming component (200); The mold component (100) comprises an outer mold component (101), and an inner lining component (102) rotating at the center of the outer mold component (101), and also comprises an adjustment component (103) rotating on the inner lining component (102), wherein the adjustment component (103) is connected to the outer mold component (101), and also comprises a bottom support component (104) fixed on the outer mold component (101), wherein a mold for machining a sliding bearing is formed by the outer mold component (101), the inner lining component (102) and the bottom support component (104); The defoaming component (200) comprises a knocking component (201) sliding on the bottom of the base component (104), and an elastic component (202) sliding on the inner wall of the lining component (102); the knocking component (201) and the elastic component (202) are matched with each other, and further comprises a trigger component (203) matched with the outer wall of the knocking component (201), and further comprises a lever component (204) rotating on the outer wall of the trigger component (203); the lever component (204) can drive the trigger component (203) and the knocking component (201) to squeeze the elastic component (202); then, the trigger component (203) releases the connection with the knocking component (201), so that the elastic component (202) drives the knocking component (201) to knock on the base component (104), thereby reducing bubbles in the material when pouring the mold.

3. The casting method of the aluminum-tin alloy sliding bearing according to claim 2, characterized in that: The outer mold assembly (101) comprises a support seat (101a), a housing tube (101b) fixed at the center of the support seat (101a), and a cooling tube (101c) fixed in the gap of the housing tube (101b).

4. The casting method of the aluminum-tin alloy sliding bearing according to claim 3, characterized in that: The lining assembly (102) comprises a hollow tube (102a) fixed to the inner wall of the bottom end of the support seat (101a), a slide groove (102b) is provided on the outer wall of the hollow tube (102a), an L-shaped groove (102c) is provided on the top of the outer wall of the hollow tube (102a) corresponding to the slide groove (102b), and a lining rod (102d) rotated on the top of the hollow tube (102a).

5. The casting method of the aluminum-tin alloy sliding bearing according to claim 2, characterized in that: The adjustment component (103) comprises an arc-shaped strip (103a) fixed to the inner wall of the bottom end of the outer mold component (101) corresponding to the lining component (102), grooves (103b) are provided at both ends of the top of the arc-shaped strip (103a), and an adjustment rod (103c) is provided in the groove (103b) on one side, and the adjustment rod (103c) is connected to the lining component (102).

6. The casting method of the aluminum-tin alloy sliding bearing according to claim 2, characterized in that: The bottom support assembly (104) comprises an outer tube (104a) fixed to the bottom of the outer mold assembly (101), and a bottom support ring (104b) sliding on the inner wall of the outer tube (104a), the outer wall of the bottom support ring (104b) being compatible with the inner wall of the outer mold assembly (101), and further comprises a sliding block (104c) fixed to the bottom of the bottom support ring (104b), the sliding block (104c) being compatible with the lining assembly (102).

7. The casting method of the aluminum-tin alloy sliding bearing according to claim 2, characterized in that: The striking component (201) comprises a circular ring (201a) movably connected to the outer wall of the lining component (102) corresponding to the bottom of the base component (104); movable grooves (201b) are provided on both sides of the inner wall of the circular ring (201a); a through groove (201c) is provided inside the inner wall of the circular ring (201a) corresponding to the movable groove (201b); a clamping groove (201d) is provided adjacent to the outer wall of the circular ring (201a) corresponding to the movable groove (201b); an inclined edge (201e) is provided at the bottom of the circular ring (201a) corresponding to the bottom of the clamping groove (201d); and a connecting rod (201f) fixed to the top of the circular ring (201a); the top of the connecting rod (201f) passes through the inside of the base component (104) and is fixedly connected to a top ring (201g).

8. The casting method of the aluminum-tin alloy sliding bearing according to claim 4, characterized in that: The elastic component (202) comprises a transmission plate (202a) that slides inside the hollow tube (102a), a No. 1 spring (202b) fixed between the transmission plate (202a) and the hollow tube (102a), and a triangular plate (202c) fixed in a corresponding slide groove (102b) on the outer wall of the transmission plate (202a).

9. The casting method of aluminum-tin alloy sliding bearing according to claim 2, characterized in that: The trigger component (203) comprises a movable ring (203a) movably connected to the outer wall of the lining component (102) corresponding to the bottom of the knocking component (201), and a device shell (203b) fixed to the outer wall of the movable ring (203a) corresponding to the bottom of the inclined edge (201e), and also comprises a driving block (203c) sliding on the inner wall of the bottom end of the device shell (203b), and also comprises a number one triangle block (203d) fixed to the bottom of the driving block (203c) corresponding to the bottom of the device shell (203b), and also comprises a The invention further comprises a No. 2 spring (203e) between the driving block (203c) and the device shell (203b), two vertical plates (203f) rotating inside the device shell (203b) corresponding to the top of the driving block (203c), the vertical plates (203f) and the driving block (203c) being connected, a clamping block (203g) rotating on the top of the two vertical plates (203f), and a No. 2 triangular block (203h) fixed to the outer wall of the lining component (102) corresponding to the bottom of the No. 1 triangular block (203d).

10. The casting method of aluminum-tin alloy sliding bearing according to claim 2, characterized in that: The lever assembly (204) comprises a fixed seat (204a) fixed on the outer mold assembly (101), and a tilting rod (204b) rotating on the top of the fixed seat (204a), and also comprises a transmission rod (204c) rotating on the end of the tilting rod (204b), wherein the transmission rod (204c) is connected to the movable ring (203a).

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