Precision bearing casting molding device and method

Abstract

The present invention relates to the field of bearing casting and molding, and discloses a precision bearing casting and molding device and method thereof, wherein the device comprises a frame one and a frame two, wherein a chain plate conveyor is arranged inside the frame one, and a plurality of mounting platforms are fixedly connected to the chain plates of the chain plate conveyor, and a positioning frame is fixedly connected to the mounting platform, and a molding mold mechanism is arranged inside the positioning frame. The present invention can automatically pour and inject molten metal into a molten metal casting mechanism through the coordinated use of a melting furnace and a driving mechanism two, and can drive the molten metal casting mechanism to rotate and cast molten metal into the molding mold mechanism through the setting of the driving mechanism one, so that when the device is casting the bearing ring, the molten metal can be automatically transferred and cast throughout the whole process, without the need for manual transfer and casting of the molten metal, which not only improves the casting and molding effect of the bearing set, but also improves the safety of the molten metal transfer and casting process.

Description

Technical Field

[0001] The invention relates to the technical field of bearing casting and forming, in particular to a precision bearing casting and forming device and method thereof. Background Art

[0002] According to ISO classification standards, precision bearings are divided into: P0, P6, P5, P4, P2. The grades increase in sequence, with P0 being ordinary precision and the other grades being precision grades. Of course, different classification standards and different types of bearings have different classification methods, but the meaning is the same. The performance of precision bearings requires the rotating body to have high runout accuracy, high-speed rotation, and small friction and friction change.

[0003] With the rapid development of modern industry, precision bearings are more and more widely used, and the production method of bearing rings is mostly casting. Casting is a process of melting metal into a liquid that meets certain requirements and pouring it into a mold. After cooling, solidification, and cleaning, a casting with a predetermined shape, size, and performance is obtained. The casting blank is almost formed, so it can achieve the purpose of no mechanical processing or a small amount of processing, which reduces costs and time to a certain extent. Casting is one of the basic processes of the modern machinery manufacturing industry.

[0004] In the prior art, in the bearing casting and molding device, when casting and molding the bearing ring, it is necessary to manually use a receiving vessel to receive the molten metal in the furnace, and then inject the molten metal in the receiving vessel from the casting port of the sand mold into the molding cavity in the sand mold for casting and molding. In this process, it is necessary to transfer the molten metal many times, and the temperature of the molten metal is extremely high. Manual multiple transfers pose a great safety hazard and are not conducive to efficient and safe production. In addition, when the molten metal is cast into the molding cavity of the sand mold, there is a lack of automatic air exhaust function, which makes it difficult to exhaust the air in the molding cavity, and it is easy to cause a large number of honeycomb holes to appear on the surface of the casting after cooling and molding, which greatly affects the quality of the finished casting. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a precision bearing casting molding device and method thereof, which effectively solves the problems in the background technology.

[0006] In order to achieve the above-mentioned object, the technical scheme adopted by the present invention is: a precision bearing casting molding device, comprising a frame one and a frame two, a chain plate conveyor is arranged inside the frame one, a plurality of mounting platforms are fixedly connected to the chain plates of the chain plate conveyor, a positioning frame is fixedly connected to the mounting platform, a molding die mechanism is arranged inside the positioning frame, a latch mechanism for limiting and fixing the molding die mechanism is also arranged on the front side of the positioning frame, and a pin hole for cooperating with the latch mechanism is opened on the molding die mechanism;

[0007] The inner wall of the frame 1 is provided with an arc-shaped unlocking member 1 and an arc-shaped unlocking member 2 for unlocking the latch mechanism;

[0008] A support platform is fixedly installed between the frame 1 and the frame 2, a gantry and a driving mechanism 1 are arranged on the top of the support platform, a molten metal casting mechanism is arranged on the gantry, and the driving mechanism 1 is used to drive the molten metal casting mechanism to rotate so that the molten metal is cast into the molding mold mechanism;

[0009] The top of the support platform is also provided with a striking mechanism for striking the positioning frame to make it vibrate, and a transmission mechanism for transmission is provided between the striking mechanism and the driving mechanism 1;

[0010] Two tripods are fixedly installed on the top of the frame 2, and a furnace is rotatably connected between the tripods via a support shaft. A cross frame is fixedly installed on one of the tripods, and a driving mechanism 2 is arranged on the top of the cross frame. The driving mechanism 2 is used to drive the furnace to rotate so that the molten metal is poured into the molten metal casting mechanism.

[0011] Preferably, the molding mold mechanism includes a lower mold frame, a lower sand mold is arranged inside the lower mold frame, positioning holes are opened at the four corners of the top of the lower mold frame, positioning columns are movably inserted in the positioning holes, the tops of the four positioning columns are fixedly connected with the same upper mold frame, an upper sand mold is arranged inside the upper mold frame, a molding cavity is arranged between the upper sand mold and the lower sand mold, a casting port connected to the molding cavity is opened on the top of the upper sand mold, and the pin hole is opened on the front side of the lower mold frame.

[0012] Preferably, the molten metal casting mechanism includes a molten metal receiving vessel rotatably mounted on the inner wall of the gantry, the front of the molten metal receiving vessel is fixedly connected to a casting pipe, a sealing assembly is provided on the front of the casting pipe, and a receiving interface is opened on the top of the molten metal receiving vessel.

[0013] Preferably, the sealing assembly includes two fixed blocks fixedly mounted on the front side of the casting pipe, a sealing plate is rotatably connected between the opposite sides of the two fixed blocks, a torsion spring is arranged between the sealing plate and the fixed blocks, a steel wire drive rope is fixedly connected between the top of the sealing plate and the gantry, and L-shaped baffles are fixedly connected on both sides of the sealing plate.

[0014] Preferably, the driving mechanism 1 includes a slide rail and an electric push rod fixedly mounted on the top of the support platform, the slide rail is internally slidably connected to a slider, the telescopic end of the electric push rod is fixedly connected to the back of the slider, the top of the slider is hinged with a connecting rod 1, and the other end of the connecting rod 1 is hinged to the bottom of the molten metal receiving vessel.

[0015] Preferably, the striking mechanism includes a rotating shaft rotatably mounted on the top of the support platform, the top of the rotating shaft is fixedly connected to a mounting block, the mounting block is fixedly connected to a telescopic rod, the other end of the telescopic rod is fixedly connected to a circular plate, the other side of the circular plate is fixedly connected to a hemispherical rubber striking block, and a return spring is fixedly connected between the mounting block and the opposite side of the circular plate and located on the outside of the telescopic rod.

[0016] Preferably, the transmission mechanism includes a second rotating shaft and a driving rack, the second rotating shaft is rotatably mounted on the top of the support platform, the driving rack is fixedly mounted on the slider, the outer surface of the second rotating shaft is fixedly sleeved with a gear and a large pulley, the gear is meshed with the driving rack, the outer surface of the large pulley is connected to a small pulley through a transmission belt, the small pulley is fixedly sleeved on the outer surface of the first rotating shaft, a guide rod is movably inserted inside the driving rack, and the guide rod is fixedly mounted on the frame one.

[0017] Preferably, the second driving mechanism includes a second connecting rod and a hydraulic rod, the second connecting rod is fixedly mounted on the supporting shaft, a strip-shaped through groove is provided on the second connecting rod, the hydraulic rod is fixedly mounted on the top of the cross frame, the telescopic end of the hydraulic rod is fixedly connected to a U-shaped frame, a fixing rod is fixedly connected to the inside of the U-shaped frame, and the fixing rod is movably inserted in the strip-shaped through groove.

[0018] Preferably, the latch mechanism includes a square rod latch that is movably installed through the positioning frame, the end of the square rod latch away from the positioning frame is fixedly connected to a circular plate 2, the bottom of the circular plate 2 is rotatably connected to a roller, the circular plate 2 and the positioning frame are fixedly connected to a return spring 2, and the square rod latch is adaptively arranged to the pin hole.

[0019] The present invention also provides a precision bearing casting method, which uses the above precision bearing casting device and specifically includes the following steps:

[0020] S1. First, put the metal material to be smelted into the furnace, melt the metal material through the furnace to form molten metal, start the second drive mechanism to rotate the support shaft, and drive the furnace to rotate, so as to pour the molten metal in the furnace into the molten metal casting mechanism. After the pouring is completed, start the second drive mechanism again to rotate the furnace to reset;

[0021] S2, start the chain conveyor to make it operate, drive the positioning frame and the latch mechanism to move synchronously, and when the latch mechanism moves to a position opposite to the arc-shaped unlocking member 1, close the chain conveyor. At the same time, the arc-shaped unlocking member 1 unlocks the latch mechanism, making it convenient for the staff to put the forming mold mechanism into the positioning frame and complete the loading of the forming mold mechanism;

[0022] S3, start the chain conveyor again, so that the positioning frame and the forming mold mechanism move toward the direction of the molten metal casting mechanism, and the latch mechanism is disengaged from the arc-shaped unlocking member 1, the latch mechanism is reset and used in conjunction with the pin hole to limit and fix the forming mold mechanism;

[0023] S4. When the forming mold mechanism moves to a position opposite to the molten metal casting mechanism, the chain conveyor is closed and the driving mechanism 1 is started. The driving mechanism 1 drives the molten metal casting mechanism to rotate, and when the molten metal casting mechanism approaches the target rotation angle, the steel wire driving rope is in a straight state. At this time, the driving mechanism 2 continues to drive the metal casting mechanism to rotate to the target angle. During this process, the steel wire driving rope pulls the plugging component to rotate it, and the casting pipe is opened, so that the molten metal inside the molten metal receiving vessel is cast into the forming mold mechanism through the casting pipe. After the casting is completed, the molten metal casting mechanism is driven by the driving mechanism 1 to rotate and reset. At the same time, the plugging component is reset to close the casting pipe;

[0024] S5, in step S4, when the driving mechanism operates to drive the metal liquid casting mechanism to rotate, the kinetic energy can be transmitted to the striking mechanism through the transmission mechanism, driving the striking mechanism to operate synchronously, thereby striking the positioning frame opposite thereto, so that the forming mold mechanism with the metal liquid cast therein is vibrated, so as to facilitate the discharge of the air in the forming cavity;

[0025] S6. The operation of the chain conveyor drives the forming mold mechanism to move in the direction of the arc-shaped unlocking member 2. When it moves to a position opposite to the arc-shaped unlocking member 2, the arc-shaped unlocking member 2 unlocks the latch mechanism, making it convenient for the staff to take the forming mold mechanism out of the placement frame and complete the unloading of the forming mold mechanism.

[0026] The present invention has the following beneficial effects:

[0027] 1. The present invention can automatically pour and inject molten metal into the molten metal casting mechanism through the coordinated use of the melting furnace and the driving mechanism 2, and can drive the molten metal casting mechanism to rotate through the setting of the driving mechanism 1, and cast the molten metal into the molding mold mechanism, so that when the device is casting the bearing ring, the molten metal can be automatically transferred and cast throughout the whole process, without the need for manual transfer and casting of the molten metal, which not only improves the casting effect of the bearing set, but also improves the safety of the molten metal transfer and casting process.

[0028] 2. The present invention uses a transmission mechanism and a striking mechanism in coordination. When the driving mechanism drives the molten metal casting mechanism to rotate and cast the molten metal into the molding mold mechanism, the striking mechanism can be simultaneously driven to strike the positioning frame opposite thereto, so that the molding mold mechanism with the molten metal cast therein is vibrated, thereby facilitating the discharge of air in the molding cavity and avoiding the phenomenon of a large number of honeycomb holes on the surface of the bearing ring casting after cooling and molding, thereby greatly improving the quality of the finished bearing ring casting.

[0029] 3. Through the coordinated use of the blocking component and the wire drive rope, when the molten metal casting mechanism rotates to the target position for molten metal casting, the blocking plate can be automatically opened (that is, the casting tube is opened), and after the casting is completed, when the molten metal casting mechanism rotates and resets, the blocking plate is automatically closed, thereby avoiding the situation in which the molten metal is discharged before the target position is reached during the up and down rotation of the casting tube (that is, the casting tube is not opposite to the casting port on the molding mold mechanism of the molten metal to be cast), thereby ensuring the accurate casting of the molten metal, avoiding the waste caused by the skewed casting of the molten metal, improving the utilization rate of the molten metal, and reducing the casting cost of the bearing.

[0030] 4. By setting the L-shaped baffle, the molten metal can be shielded when it is discharged from the casting pipe, preventing the molten metal flowing out of the casting pipe from flowing to the outside of the casting port, thereby improving the accuracy of molten metal casting.

[0031] 5. Through the coordinated use of the positioning frame, the latch mechanism and the pin hole, the molding die mechanism can be limited and fixed to improve the stability of the molding die mechanism during movement and avoid position deviation.

[0032] 6. Through the arrangement of arc-shaped unlocking member 1 and arc-shaped unlocking member 2, when the latch mechanism moves to be opposite to the arc-shaped unlocking member when the link conveyor drives the positioning frame and the latch mechanism to move, the arc-shaped unlocking member can automatically unlock the latch mechanism, that is, contact the limit fixation of the molding mold mechanism, so that the staff can put the molding mold mechanism into or take out the positioning frame, which improves the convenience of the staff in loading and unloading the molding mold mechanism, and when the chain conveyor drives the latch mechanism to move and disengage from the unlocking mechanism, the elastic force of the reset spring 2 can drive the square rod latch to reset (that is, move to the inner cavity of the positioning frame) and insert it into the pin hole, so as to realize the limit fixation of the molding mold mechanism, and the staff does not need to manually operate the latch mechanism, with a high degree of automation, which reduces the manpower input cost during the operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front view of the overall structure of the present invention;

[0034] Figure 2 It is a left view of the overall structure of the present invention;

[0035] Figure 3 It is a right view of the overall structure of the present invention;

[0036] Figure 4 It is a schematic diagram of the pouring state of the molten metal by the molten metal casting mechanism of the present invention;

[0037] Figure 5 This is a schematic diagram of the state of pouring molten metal from the melting furnace of the present invention;

[0038] Figure 6 It is a schematic diagram of an initial state of a molten metal casting mechanism and a driving mechanism of the present invention;

[0039] Figure 7 It is a schematic diagram of the telescopic end of the electric push rod of the present invention in an extended state;

[0040] Figure 8 It is a schematic diagram from another angle showing an initial state of the molten metal casting mechanism and the driving mechanism of the present invention;

[0041] Fig. 9 It is a schematic diagram of the initial state of the furnace and the driving mechanism of the present invention;

[0042] Fig.10 It is a schematic diagram of the telescopic end of the hydraulic rod of the present invention in the extended state;

[0043] Fig.11 It is a structural explosion diagram of the molding die mechanism of the present invention;

[0044] Fig.12 It is a structural schematic diagram of the square rod latch and the positioning frame of the present invention;

[0045] Fig.13 for Figure 2 A in the enlarged view;

[0046] Fig.14 for Figure 3 The enlarged view of point B in the figure;

[0047] Fig.15 for Figure 3 The enlarged view of point C in the figure;

[0048] Fig.16 for Figure 4 The enlarged view of point D in the figure;

[0049] Fig.17 for Figure 6 Enlarged view of point E in FIG.

[0050] In the figure: 1, frame 1; 2, frame 2; 3, chain conveyor; 4, mounting table; 5, positioning frame; 6, pin hole; 7, arc unlocking piece 1; 8, arc unlocking piece 2; 9, support table; 10, gantry; 11, tripod; 12, support shaft; 13, furnace; 14, cross frame; 15, lower mold frame; 16, lower sand mold; 17, positioning hole; 18, positioning column; 19, upper mold frame; 20, upper sand mold; 21, molding cavity; 22, casting mouth; 23, metal liquid receiving vessel; 24, casting pipe; 25, receiving interface; 26, fixing block; 27, blocking plate; 28, torsion spring; 29, Wire drive rope; 30, L-shaped baffle; 31, slide rail; 32, electric push rod; 33, slider; 34, connecting rod one; 35, rotating shaft one; 36, mounting block; 37, telescopic rod; 38, circular plate one; 39, hemispherical rubber striking block; 40, reset spring one; 41, rotating shaft two; 42, driving rack; 43, gear; 44, large pulley; 45, transmission belt; 46, small pulley; 47, guide rod; 48, connecting rod two; 49, hydraulic rod; 50, strip groove; 51, U-shaped frame; 52, fixing rod; 53, square rod latch; 54, circular plate two; 55, roller; 56, reset spring two. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] As attached Figure 1 To Attachment Fig.17 As shown:

[0053] Embodiment 1: The present invention provides a precision bearing casting molding device, including a frame 1 and a frame 2, wherein a chain plate conveyor 3 is arranged inside the frame 1, and a plurality of mounting platforms 4 are fixedly connected to the chain plates of the chain plate conveyor 3, and a positioning frame 5 is fixedly connected to the mounting platform 4, and a molding mold mechanism is arranged inside the positioning frame 5, and a latch mechanism for limiting and fixing the molding mold mechanism is also arranged on the front of the positioning frame 5, and a pin hole 6 used in conjunction with the latch mechanism is opened on the molding mold mechanism;

[0054] The inner wall of the frame 1 is provided with an arc-shaped unlocking member 1 7 and an arc-shaped unlocking member 2 8 for unlocking the latch mechanism;

[0055] A support platform 9 is fixedly installed between the frame 1 and the frame 2, a gantry 10 and a driving mechanism 1 are arranged on the top of the support platform 9, a molten metal casting mechanism is arranged on the gantry 10, and the driving mechanism 1 is used to drive the molten metal casting mechanism to rotate so that the molten metal is cast into the molding mold mechanism;

[0056] The top of the support platform 9 is also provided with a striking mechanism for striking the positioning frame 5 to make it vibrate, and a transmission mechanism for transmission is provided between the striking mechanism and the driving mechanism 1;

[0057] Two tripods 11 are fixedly installed on the top of the frame 2, and a furnace 13 is rotatably connected between the tripods 11 through a support shaft 12. A cross frame 14 is fixedly installed on one of the tripods 11, and a driving mechanism 2 is arranged on the top of the cross frame 14. The driving mechanism 2 is used to drive the furnace 13 to rotate so that the molten metal is poured into the molten metal casting mechanism.

[0058] The molding mold mechanism includes a lower mold frame 15, a lower sand mold 16 is arranged inside the lower mold frame 15, positioning holes 17 are opened at the four corners of the top of the lower mold frame 15, positioning columns 18 are movably inserted in the positioning holes 17, and the tops of the four positioning columns 18 are fixedly connected with the same upper mold frame 19, an upper sand mold 20 is arranged inside the upper mold frame 19, a molding cavity 21 is arranged between the upper sand mold 20 and the lower sand mold 16, a casting port 22 connected to the molding cavity 21 is opened at the top of the upper sand mold 20, and the pin hole 6 is opened on the front side of the lower mold frame 15.

[0059] The molten metal casting mechanism includes a molten metal receiving vessel 23 rotatably mounted on the inner wall of the gantry 10 , the front of the molten metal receiving vessel 23 is fixedly connected to a casting pipe 24 , the front of the casting pipe 24 is provided with a blocking component, and a receiving port 25 is provided on the top of the molten metal receiving vessel 23 .

[0060] The sealing assembly includes two fixed blocks 26 fixedly installed on the front side of the casting pipe 24, a sealing plate 27 is rotatably connected between the opposite sides of the two fixed blocks 26, a torsion spring 28 is arranged between the sealing plate 27 and the fixed block 26, a wire drive rope 29 is fixedly connected between the top of the sealing plate 27 and the gantry 10, and L-shaped baffles 30 are fixedly connected on both sides of the sealing plate 27.

[0061] The driving mechanism 1 includes a slide rail 31 and an electric push rod 32 fixedly installed on the top of the support platform 9. The slide rail 31 is slidably connected to a slider 33 inside. The telescopic end of the electric push rod 32 is fixedly connected to the back of the slider 33. The top of the slider 33 is hinged with a connecting rod 1 34, and the other end of the connecting rod 1 34 is hinged to the bottom of the metal liquid receiving vessel 23.

[0062] The striking mechanism includes a rotating shaft 35 rotatably mounted on the top of the support platform 9, a mounting block 36 is fixedly connected to the top of the rotating shaft 35, a telescopic rod 37 is fixedly connected to the mounting block 36, a circular plate 38 is fixedly connected to the other end of the telescopic rod 37, a hemispherical rubber striking block 39 is fixedly connected to the other side of the circular plate 38, and a return spring 40 is fixedly connected between the mounting block 36 and the opposite side of the circular plate 38 and located on the outside of the telescopic rod 37.

[0063] The transmission mechanism includes a rotating shaft 2 41 and a driving rack 42. The rotating shaft 2 41 is rotatably mounted on the top of the support platform 9, and the driving rack 42 is fixedly mounted on the slider 33. The outer surface of the rotating shaft 2 41 is fixedly sleeved with a gear 43 and a large pulley 44. The gear 43 is meshed with the driving rack 42. The outer surface of the large pulley 44 is connected to a small pulley 46 through a transmission belt 45. The small pulley 46 is fixedly sleeved on the outer surface of the rotating shaft 1 35. A guide rod 47 is movably inserted inside the driving rack 42. The guide rod 47 is fixedly mounted on the frame 1. The setting of the guide rod 47 can support and limit the driving rack 42, thereby improving the stability of the driving rack 42 during movement.

[0064] The present invention also provides a precision bearing casting method, which uses the above precision bearing casting device and specifically includes the following steps:

[0065] S1, in the initial state, the steel wire driving rope 29 is in a relaxed state, the melting furnace 13 is in a vertical state, and the molten metal receiving vessel 23 is in a horizontal state. First, the metal material to be smelted is placed in the melting furnace 13, and the metal material is smelted and formed into molten metal by the melting furnace 13. When the smelted molten metal needs to be poured into the molten metal receiving vessel 23, the supporting shaft 12 is rotated by starting the second driving mechanism, and the melting furnace 13 is driven to rotate, so that the molten metal in the melting furnace 13 is poured out and flows into the molten metal receiving vessel 23 through the receiving port 25 at the top of the molten metal receiving vessel 23. After the pouring is completed, the second driving mechanism is started again to rotate the melting furnace 13 to reset;

[0066] S2, start the chain plate conveyor 3 to make it operate, drive the positioning frame 5 and the latch mechanism to move synchronously, when the latch mechanism moves to the position relative to the arc unlocking member 7, close the chain plate conveyor 3, at the same time, the arc unlocking member 7 unlocks the latch mechanism, so that the staff can put the molding mold mechanism into the positioning frame 5, complete the loading of the molding mold mechanism, when the molding mold mechanism is assembled, first fill the lower mold frame 15 with a proper amount of molding sand to form a lower sand mold 16, and then set a molding matching with the bearing ring to be cast on the top of the lower sand mold 16 Cavity 21, then the upper mold frame 19 is turned upside down, and a proper amount of molding sand is filled in it to form an upper sand mold 20. Similarly, a molding cavity 21 is set on the upper sand mold 20, and a casting port 22 connected to the molding cavity 21 is opened on the upper sand mold 20. The two molding cavities 21 together constitute a molding cavity 21 of a bearing ring. Then, the upper sand mold 20 and the lower sand mold 16 are sprayed with fire to harden their surfaces, and then the positioning column 18 on the upper mold frame 19 is inserted into the positioning hole 17 on the lower mold frame 15 to complete the assembly operation of the molding mold mechanism;

[0067] S3, start the chain conveyor 3 again, so that the positioning frame 5 and the forming mold mechanism move toward the direction of the molten metal casting mechanism, and the latch mechanism is disengaged from the arc-shaped unlocking member 7, the latch mechanism is reset and used in conjunction with the pin hole 6 to limit and fix the forming mold mechanism, thereby improving the stability of the forming mold mechanism during movement;

[0068] S4. When the molding die mechanism moves to a position opposite to the molten metal casting mechanism, the chain conveyor 3 is closed and the driving mechanism 1 is started. The telescopic end of the electric push rod 32 is extended to push the slider 33 to move in the slide rail 31 toward one side of the molding die mechanism, and the molten metal receiving vessel 23 is lifted upward through the connecting rod 1 34, so that the molten metal receiving vessel 23 and the casting tube 24 rotate synchronously, and when the casting tube 24 approaches the target rotation angle (at this time, the molten metal discharged from the casting tube 24 can flow into the casting port 22), the originally loose steel wire drive rope 29 is just stretched straight, and the electric push rod 32 continues to extend, driving the casting tube 24 to rotate to the target angle (that is, the casting tube 24 is opposite to the casting port 22 on the molding die mechanism for pouring the molten metal). In this process, the steel wire drive rope 29 pulls the sealing plate 27 to rotate it, opens the casting tube 24, and when the sealing plate 27 rotates The torsion spring 28 is deformed and stores energy. After the casting tube 24 is opened, the molten metal in the molten metal receiving container 23 flows out through the casting tube 24 and flows into the molding cavity 21 in the molding die mechanism through the casting port 22, so as to realize the casting of the molten metal. After the casting is completed, the molten metal casting mechanism is driven to rotate and reset by the contraction of the electric push rod 32. At the same time, the steel wire driving rope 29 no longer pulls the blocking plate 27. The blocking plate 27 is automatically reset by the elastic force of the torsion spring 28, and the casting tube 24 is closed, so as to avoid the situation that the casting tube 24 starts to discharge the molten metal before reaching the target position (that is, the casting tube 24 is not opposite to the casting port 22 on the molding die mechanism for the molten metal to be cast) during the up and down rotation of the casting tube 24, thereby ensuring the accurate casting of the molten metal, avoiding the waste caused by the skewed casting of the molten metal, improving the utilization rate of the molten metal, and reducing the casting cost of the bearing.

[0069] S5, in step S4, during the operation of the driving mechanism 1 to drive the metal liquid casting mechanism to rotate, the slider 33 moves to drive the driving rack 42 to move, and then drives the gear 43 meshing therewith to rotate, and drives the rotating shaft 2 41 and the large pulley 44 to rotate synchronously, so that the kinetic energy is transmitted to the small pulley 46 through the transmission belt 45, thereby driving the small pulley 46 and the rotating shaft 1 35 to rotate synchronously, and drives the telescopic rod 37, the circular plate 1 38 and the hemispherical rubber striking block to rotate synchronously through the mounting block 36, thereby striking the positioning frame 5 opposite thereto, so that the molding mold mechanism with the metal liquid cast therein is vibrated, so as to facilitate the discharge of the air in the molding cavity 21, avoid the phenomenon of a large number of honeycomb holes on the surface of the bearing ring casting after cooling and molding, and greatly improve the quality of the finished bearing ring casting;

[0070] S6. Then, the chain conveyor 3 is started to drive the forming mold mechanism to move toward the arc-shaped unlocking member 2 8. During this process, the molten metal cast in the forming mold mechanism solidifies and forms. When it moves to a position opposite to the arc-shaped unlocking member 2 8, the arc-shaped unlocking member 2 8 unlocks the latch mechanism, making it convenient for the staff to take the forming mold mechanism out of the placement frame and complete the unloading of the forming mold mechanism.

[0071] Embodiment 2: This embodiment is basically the same as the previous embodiment, with the difference that the driving mechanism 2 includes a connecting rod 2 48 and a hydraulic rod 49, the connecting rod 2 48 is fixedly mounted on the support shaft 12, a strip-shaped through groove 50 is provided on the connecting rod 2 48, the hydraulic rod 49 is fixedly mounted on the top of the cross frame 14, the telescopic end of the hydraulic rod 49 is fixedly connected to a U-shaped frame 51, a fixing rod 52 is fixedly connected to the inside of the U-shaped frame 51, and the fixing rod 52 is movably inserted in the strip-shaped through groove 50.

[0072] By starting the hydraulic rod 49 to extend its telescopic end, the U-shaped frame 51 and the fixed rod 52 can be driven to move upward synchronously, so that the fixed rod 52 slides in the strip-shaped through groove 50 and drives the connecting rod 2 48 to rotate, thereby driving the furnace 13 to rotate through the support shaft 12 to pour the molten metal. Conversely, the telescopic end of the hydraulic rod 49 contracts, which can indirectly drive the furnace 13 to rotate and reset, so as to facilitate the next smelting of the metal material.

[0073] Embodiment 3: This embodiment is basically the same as the previous embodiment, with the difference that the latch mechanism includes a square rod latch 53 movably installed through the positioning frame 5, the end of the square rod latch 53 away from the positioning frame 5 is fixedly connected to a circular plate 2 54, the bottom of the circular plate 2 54 is rotatably connected to a roller 55, the circular plate 2 54 and the positioning frame 5 are fixedly connected to a return spring 2 56, and the square rod latch 53 is adapted to fit the pin hole 6.

[0074] When the roller 55 in the latch mechanism moves to abut against the arc unlocking member 1 7 and the arc unlocking member 2 8), the chain plate conveyor 3 continues to operate, driving the latch mechanism to continue to move, and the roller 55 is guided by the arc unlocking member so that the roller 55 moves to the side away from the positioning frame 5. At the same time, the return spring 2 56 is deformed and stores energy, and the movement of the roller 55 drives the circular plate 2 54 and the square rod latch 53 to move synchronously, so that the square rod latch 53 is withdrawn from the inner cavity of the positioning frame 5, and the latch mechanism is unlocked, which is convenient for the staff to put the molding mold mechanism into or take out the positioning frame 5, and improves the convenience of the staff to load and unload the molding mold mechanism. When the chain plate conveyor 3 drives the latch mechanism to move and disengages from the unlocking mechanism, the square rod latch 53 can be driven to reset (i.e. move to the inner cavity of the positioning frame 5) and inserted into the pin hole 6 by the elastic force of the return spring 2 56, so as to achieve the limit fixation of the molding mold mechanism.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precision bearing casting device, comprising a frame 1 (1) and a frame 2 (2), wherein a chain conveyor (3) is provided inside the frame 1 (1), and characterized in that: A plurality of mounting platforms (4) are fixedly connected to the chain plates of the chain conveyor (3); a positioning frame (5) is fixedly connected to the mounting platform (4); a forming mold mechanism is arranged inside the positioning frame (5); a latch mechanism for limiting and fixing the forming mold mechanism is also arranged on the front side of the positioning frame (5); and a pin hole (6) for use with the latch mechanism is provided on the forming mold mechanism; The inner wall of the frame 1 (1) is provided with an arc-shaped unlocking member 1 (7) and an arc-shaped unlocking member 2 (8) for unlocking the latch mechanism; A support platform (9) is fixedly installed between the frame 1 (1) and the frame 2 (2), a gantry (10) and a driving mechanism 1 are arranged on the top of the support platform (9), a molten metal casting mechanism is arranged on the gantry (10), and the driving mechanism 1 is used to drive the molten metal casting mechanism to rotate so that the molten metal is cast into the molding die mechanism; The top of the support platform (9) is also provided with a striking mechanism for striking the positioning frame (5) to cause it to vibrate, and a transmission mechanism for transmission is provided between the striking mechanism and the driving mechanism. Two tripods (11) are fixedly mounted on the top of the frame 2 (2), and a furnace (13) is rotatably connected between the tripods (11) via a support shaft (12), a cross frame (14) is fixedly mounted on one of the tripods (11), and a driving mechanism 2 is arranged on the top of the cross frame (14), and the driving mechanism 2 is used to drive the furnace (13) to rotate so that the molten metal is poured into the molten metal casting mechanism; The molten metal casting mechanism comprises a molten metal receiving vessel (23) rotatably mounted on the inner wall of the gantry (10), the front side of the molten metal receiving vessel (23) being fixedly connected to a casting pipe (24), the front side of the casting pipe (24) being provided with a blocking component, and the top of the molten metal receiving vessel (23) being provided with a receiving port (25); The blocking assembly comprises two fixed blocks (26) fixedly mounted on the front side of the casting pipe (24); a blocking plate (27) is rotatably connected between opposite sides of the two fixed blocks (26); a torsion spring (28) is provided between the blocking plate (27) and the fixed block (26); a steel wire drive rope (29) is fixedly connected between the top of the blocking plate (27) and the gantry (10); and L-shaped baffles (30) are fixedly connected to both sides of the blocking plate (27); The driving mechanism 1 comprises a slide rail (31) and an electric push rod (32) fixedly mounted on the top of the support platform (9); a slider (33) is slidably connected inside the slide rail (31); a telescopic end of the electric push rod (32) is fixedly connected to the back of the slider (33); a connecting rod 1 (34) is hingedly connected to the top of the slider (33); and the other end of the connecting rod 1 (34) is hingedly connected to the bottom of the metal liquid receiving vessel (23); The striking mechanism comprises a rotating shaft (35) rotatably mounted on the top of the support platform (9); a mounting block (36) is fixedly connected to the top of the rotating shaft (35); a telescopic rod (37) is fixedly connected to the mounting block (36); a circular plate (38) is fixedly connected to the other end of the telescopic rod (37); a hemispherical rubber striking block (39) is fixedly connected to the other side of the circular plate (38); and a return spring (40) is fixedly connected between the mounting block (36) and the opposite side of the circular plate (38) and located on the outside of the telescopic rod (37).

2. The precision bearing casting device according to claim 1, characterized in that: The molding die mechanism comprises a lower die frame (15), a lower sand mold (16) is arranged inside the lower die frame (15), positioning holes (17) are respectively provided at four corners of the top of the lower die frame (15), positioning posts (18) are movably inserted in the positioning holes (17), the tops of the four positioning posts (18) are fixedly connected to the same upper die frame (19), an upper sand mold (20) is arranged inside the upper die frame (19), a molding cavity (21) is arranged between the upper sand mold (20) and the lower sand mold (16), a casting port (22) connected to the molding cavity (21) is arranged on the top of the upper sand mold (20), and the pin hole (6) is arranged on the front side of the lower die frame (15).

3. The precision bearing casting device according to claim 1, characterized in that: The transmission mechanism comprises a second rotating shaft (41) and a driving rack (42), wherein the second rotating shaft (41) is rotatably mounted on the top of the support platform (9), and the driving rack (42) is fixedly mounted on the slider (33). A gear (43) and a large belt pulley (44) are fixedly sleeved on the outer surface of the second rotating shaft (41), wherein the gear (43) and the driving rack (42) are meshed with each other, and the outer surface of the large belt pulley (44) is connected to a small belt pulley (46) through a transmission belt (45), and the small belt pulley (46) is fixedly sleeved on the outer surface of the first rotating shaft (35), and a guide rod (47) is movably inserted inside the driving rack (42), and the guide rod (47) is fixedly mounted on the frame (1).

4. The precision bearing casting device according to claim 1, characterized in that: The second driving mechanism comprises a second connecting rod (48) and a hydraulic rod (49); the second connecting rod (48) is fixedly mounted on the support shaft (12); a strip-shaped through groove (50) is provided on the second connecting rod (48); the hydraulic rod (49) is fixedly mounted on the top of the cross frame (14); a telescopic end of the hydraulic rod (49) is fixedly connected to a U-shaped frame (51); a fixing rod (52) is fixedly connected to the interior of the U-shaped frame (51); and the fixing rod (52) is movably inserted into the strip-shaped through groove (50).

5. The precision bearing casting device according to claim 1, characterized in that: The latch mechanism comprises a square rod latch (53) movably penetrated and installed on the positioning frame (5); one end of the square rod latch (53) away from the positioning frame (5) is fixedly connected to a second circular plate (54); the bottom of the second circular plate (54) is rotatably connected to a roller (55); the second circular plate (54) and the positioning frame (5) are fixedly connected to a second return spring (56); and the square rod latch (53) is adapted to be arranged in a matching manner with the pin hole (6).

6. A precision bearing casting method, based on the precision bearing casting device according to any one of claims 1 to 5, characterized in that: The specific steps include: S1, firstly putting a metal material to be smelted into a melting furnace (13), melting the metal material in the melting furnace (13) to form molten metal, starting the second driving mechanism to rotate the support shaft (12), and driving the melting furnace (13) to rotate, so as to pour the molten metal in the melting furnace (13) into the molten metal casting mechanism, and after the pouring is completed, starting the second driving mechanism again to rotate the melting furnace (13) to reset; S2, start the chain conveyor (3) to make it operate, drive the positioning frame (5) and the latch mechanism to move synchronously, and when the latch mechanism moves to a position opposite to the arc-shaped unlocking member 1 (7), close the chain conveyor (3). At the same time, the arc-shaped unlocking member 1 (7) unlocks the latch mechanism, making it easier for the staff to place the molding die mechanism into the positioning frame (5), thereby completing the loading of the molding die mechanism; S3, starting the chain conveyor (3) again, so that the positioning frame (5) and the molding die mechanism move in the direction of the molten metal casting mechanism, and the latch mechanism is disengaged from the arc-shaped unlocking member (7), the latch mechanism is reset and used in conjunction with the pin hole (6) to limit and fix the molding die mechanism; S4, when the forming mold mechanism moves to a position opposite to the molten metal casting mechanism, the chain conveyor (3) is closed and the driving mechanism 1 is started. The driving mechanism 1 drives the molten metal casting mechanism to rotate, and when the molten metal casting mechanism approaches the target rotation angle, the steel wire driving rope (29) is in a stretched state. At this time, the driving mechanism 2 continues to drive the molten metal casting mechanism to rotate to the target angle. During this process, the steel wire driving rope (29) pulls the blocking component to rotate it, and opens the casting pipe (24), so that the molten metal inside the molten metal receiving container (23) is cast into the forming mold mechanism through the casting pipe (24). After the casting is completed, the molten metal casting mechanism is driven by the driving mechanism 1 to rotate and reset. At the same time, the blocking component is reset to close the casting pipe (24); S5, in step S4, during the process of the driving mechanism operating to drive the molten metal casting mechanism to rotate, the kinetic energy is transmitted to the striking mechanism through the transmission mechanism, driving the striking mechanism to operate synchronously, thereby striking the positioning frame opposite thereto, causing the forming mold mechanism with the molten metal cast therein to vibrate, thereby facilitating the discharge of air from the forming cavity (21); S6. The operation of the chain conveyor (3) drives the forming mold mechanism to move in the direction of the arc-shaped unlocking member 2 (8). When it moves to a position opposite to the arc-shaped unlocking member 2 (8), the arc-shaped unlocking member 2 (8) unlocks the latch mechanism, making it easier for the staff to take the forming mold mechanism out of the placement frame, thereby completing the unloading of the forming mold mechanism.

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