A submicron grinding center for machining castings and its machining method

Abstract

This invention discloses a submicron grinding center for casting processing and its processing method, relating to the field of casting processing technology. It includes a base, and assemblies of a ladle and a sand box located above the base. The ladle is equipped with a pouring port and a filling port. The top of the sand box assembly has a filling port. Two symmetrically arranged mounting brackets are mounted on the top surface of the base, each equipped with a synchronous moving unit. This invention ensures that the filling port of the sand box is always directly below the pouring port of the ladle, preventing molten iron from being poured onto the outer wall of the sand box. Compared to traditional fixed sand box equipment, it eliminates the need for manual adjustment of the ladle's position and calibration of the filling port and pouring port, reducing the workload.

Description

Technical Field

[0001] This invention belongs to the field of casting processing technology, specifically a submicron grinding center casting processing equipment and its processing method. Background Technology

[0002] Submicron grinding center casting machining is a key link in the precision manufacturing of high-end equipment, directly determining the core performance and long-term precision stability of the equipment. As the machining process for core load-bearing components such as the bed and column, it is necessary to achieve submicron-level precision control on the basis of castings to meet the stringent requirements of high rigidity, low vibration, and deformation resistance.

[0003] Existing submicron grinding center casting equipment suffers from significant positioning control defects and operational convenience issues during molten iron pouring: Since the sand box is typically fixed, as molten iron is gradually poured out of the ladle, its center of gravity shifts, causing continuous changes in the rotation angle. This alters the flow direction of the molten iron at the pouring port, making it prone to deviating from the sand box's pouring port and pouring onto the outer wall of the sand box. This not only wastes molten iron but also damages the sand mold on the outer wall of the sand box due to the impact of high-temperature molten iron, increasing the risk of sand inclusion defects in the casting. To avoid these problems, operators must monitor the entire pouring process in real time, manually adjusting the pouring force of the ladle or temporarily calibrating the sand box position based on the ladle's rotation angle. This requires highly experienced operators, and the delay in manual intervention can further amplify positioning errors, making it difficult to meet the pouring accuracy requirements of submicron-level castings. Summary of the Invention

[0004] To address the problems mentioned in the background art, this invention proposes a submicron grinding center for casting processing equipment and its processing method.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A submicron grinding center for casting processing includes a base and a ladle and sand box assembly located above the base. The ladle is provided with a pouring port and a filling port, and the top of the sand box assembly is provided with a filling port. Two mounting brackets symmetrically arranged on the sides of the ladle are mounted on the top surface of the base, and synchronous moving units are provided on the mounting brackets.

[0007] The synchronous moving unit includes a first rotating shaft, a second rotating shaft, and a take-up reel, and a transmission assembly is provided between the first rotating shaft and the second rotating shaft to make the first rotating shaft and the second rotating shaft rotate at the same linear speed.

[0008] There are two No. 1 rotating shafts, and each No. 1 rotating shaft is rotatably connected to a corresponding mounting bracket, and the end of the No. 1 rotating shaft is fixedly connected to the outer wall of the ladle.

[0009] The second rotating shaft is rotatably mounted on the base via a bearing seat;

[0010] A drive shaft is provided on each of the two sides of the take-up reel. Each drive shaft is connected to the second rotating shaft by a set of splicing components for connecting the second rotating shaft and the drive shaft.

[0011] The take-up reel is equipped with a traction line. The end of the traction line away from the take-up reel is connected to a movable seat via a traction frame. The top of the movable seat is equipped with a support base for driving the injection port to move directly below the discharge port.

[0012] As a further preferred embodiment of this technical solution: each set of splicing components includes a fixing sleeve, a fixing base, and a splicing block;

[0013] The fixing sleeve is fixedly connected to the second rotating shaft, and slots are arranged in a ring array on the side of the fixing sleeve away from the second rotating shaft.

[0014] The fixed base is fixedly connected to the outer wall of the transmission shaft. Two No. 1 guide shafts are slidably arranged on the fixed base, symmetrically located on both sides of the transmission shaft. The splicing block is movably sleeved on the outside of the transmission shaft, and both No. 1 guide shafts are fixedly connected to the side wall of the splicing block. The side wall of the splicing block opposite to the No. 1 guide shaft is arranged in a ring array with the same number of slots and the same number of plug blocks for use.

[0015] Each of the first guide shafts is fitted with a compression spring on its outer side, with one end of the compression spring connected to the fixed base and the other end of the compression spring connected to the splicing block.

[0016] As a further preferred embodiment of this technical solution: the transmission assembly includes a connecting block;

[0017] The connecting block has a rack at each end, and each rack is meshed with a matching gear. One of the gears is fixedly connected to the first rotating shaft, and the other gear is fixedly connected to the second rotating shaft.

[0018] A first connecting frame is installed on the mounting frame, and a sliding groove is provided on the first connecting frame;

[0019] Furthermore, the transmission assembly also includes a slider mounted on the connecting block, and the transmission assembly is slidably mounted on the inner side of the slide groove.

[0020] As a further preferred embodiment of this technical solution: a support base is provided on the top of the movable base, and a second guide shaft is provided at the four corner positions of the top surface of the support base. A placement base is slidably provided on the second guide shaft, and a number of rocking springs are arranged in an array between the support base and the placement base.

[0021] The top surface of the placement seat is provided with a limiting groove that is compatible with the sand box assembly.

[0022] As a further preferred embodiment of this technical solution: the base is further equipped with a height-increasing frame, the height-increasing frame is equipped with a swaying drive unit, the swaying drive unit includes a disc shaft rotatably mounted on the height-increasing frame, and a disc is eccentrically mounted on the disc shaft;

[0023] The side of the placement base is connected to a pressing plate via a second connecting frame, located directly below the disc;

[0024] The swaying drive unit also includes a driving sprocket and a driven sprocket. The driving sprocket is fixedly mounted on the first rotating shaft, and the driven sprocket is fixedly mounted on the disc shaft. The driving sprocket and the driven sprocket are connected by a chain drive.

[0025] As a further preferred embodiment of this technical solution: the disk is also provided with a plurality of axles arranged in a circular array, and each axle is provided with a roller for rotation.

[0026] As a further preferred embodiment of this technical solution: the synchronous moving unit further includes at least two sliding shafts arranged parallel to each other on the base, and the moving seat is slidably connected to the sliding shafts through an adapter groove;

[0027] Each of the sliding shafts is fitted with a return spring on its outer side. One end of the return spring is connected to the base, and the other end of the return spring is connected to the movable seat.

[0028] Furthermore, the synchronous moving unit also includes a fixed frame mounted on the base, and the fixed frame is provided with a baffle for positioning the moving seat at the reset position.

[0029] As a further preferred embodiment of this technical solution: a vertical frame is installed on the base, a first rotating seat is provided on the vertical frame, and a power cylinder is rotatably connected to the first rotating seat;

[0030] Furthermore, a second rotating seat is provided on the outer wall of the ladle, and the output end of the power cylinder is rotatably connected to the second rotating seat.

[0031] As a further preferred embodiment of this technical solution: the mounting bracket is provided with a sleeve column located on the outside of the first rotating shaft, the sleeve column is provided with a through groove, and the outer wall of the first rotating shaft is provided with a pressing block located inside the through groove.

[0032] As a further preferred embodiment of this technical solution: a method for machining castings using a submicron grinding center, comprising the following steps:

[0033] S1. Prepare 90% pig iron, 5% scrap steel, and 5% ductile iron by mass percentage, mix them, and then put them into a smelting equipment for heating and melting into molten iron. During the process, alloying elements are added to adjust the composition of the molten iron to obtain modulated molten iron. The modulated molten iron is composed of the following components by mass percentage: C: 3.5%-3.7%, Si: 2.3%-2.5%, Mn: 0.4%-0.6%, P: ≤0.04%, S: ≤0.020%, Mg: 0.04%-0.05%, Cu: 0.5%-0.7%, Mo: 0.2%-0.3%, with the balance being Fe;

[0034] S2. Based on the casting structure, a cavity corresponding to the casting size is made in the sand box using molding sand. A gating system is opened in the molding sand in the sand box, and the gating system size is calculated based on the casting structure to obtain a sand box cavity that meets the standard.

[0035] S3. Transfer the molten iron prepared in S1 to the ladle, and then use the ladle to pour the molten iron into the injection port on the sand box into the mold cavity. The pouring temperature is 1360℃-1370℃.

[0036] S4. After gradually cooling and solidifying, remove the pre-machined casting blank and perform four annealing treatments on the casting blank to obtain the formed submicron grinding center casting.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] 1. In this invention, when the ladle rotates, it drives the No. 1 rotating shaft to rotate synchronously. Through the transmission component, the No. 2 rotating shaft rotates at the same linear speed, which in turn drives the take-up reel to wind up the traction line and drives the moving seat to move smoothly along the sliding shaft. This ensures that the liquid injection port of the sand box is always aligned directly below the liquid pouring port of the ladle, eliminating the problem of molten iron being poured onto the outer wall of the sand box. Compared with traditional fixed sand box equipment, there is no need to manually adjust the position of the ladle or calibrate the positions of the liquid injection port of the sand box and the liquid pouring port of the ladle, reducing the difficulty of the work.

[0039] 2. In this invention, a splicing component is set between the second rotating shaft and the take-up reel. When the traction line becomes loose due to material deformation caused by long-term use, the splicing block can be pulled to disengage the plug from the slot. After rotating the take-up reel to adjust the traction line to a taut state, it can be re-inserted and positioned, thus solving the common problem of "synchronization lag after traction line deformation" in traditional synchronization equipment.

[0040] 3. In this invention, a return spring is sleeved on the sliding shaft at the bottom of the movable seat. Together with the positioning baffle on the base fixing frame, the baffle restricts the reset endpoint of the movable seat when the elastic potential energy of the spring drives the movable seat back to the initial position, thus avoiding repeated pulling and breaking of the traction line caused by the spring rebound.

[0041] 4. In this invention, the rotation of the first rotating shaft is synchronously transmitted to the disc shaft of the swaying drive unit through the transmission of the driving sprocket, chain and driven sprocket. The eccentrically set disc periodically presses the pressing plate of the placement seat, and with the swaying spring between the support seat and the placement seat, the sand box shakes up and down regularly during the molten iron injection process. On the one hand, it can break the stable aggregation state of air bubbles in the molten iron, so that the tiny air bubbles can be accelerated to rise and be discharged with the shaking. On the other hand, it can eliminate the dead zone of molten iron filling in the corner of the cavity and avoid the formation of shrinkage cavities. It is especially suitable for the forming needs of thick-walled areas such as the guide rail of castings in submicron grinding centers. Attached Figure Description

[0042] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0043] Figure 2 This is a schematic diagram of the synchronous movement unit of the present invention;

[0044] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0045] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0046] Figure 5 This is an exploded view of the splicing component of the present invention;

[0047] Figure 6 This is an exploded view of a partial structure of the synchronous moving unit of the present invention;

[0048] Figure 7 This is a partial structural diagram of the shaking drive unit of the present invention. Figure 1 ;

[0049] Figure 8 This is a partial structural diagram of the shaking drive unit of the present invention. Figure 2 ;

[0050] Figure 9 This is a schematic diagram of the ladle structure of the present invention.

[0051] Legend: 100, Base; 200, Mounting bracket; 201, Connecting bracket No. 1; 202, Slide groove; 300, Pouring ladle; 301, Pouring port; 302, Filling port; 400, Synchronous moving unit; 401, Rotating shaft No. 1; 4011, Sleeve column; 4012, Pressing block; 4013, Movable groove; 402, Transmission assembly; 4021, Connecting block; 4022, Rack; 4023, Gear; 4024, Slider; 403, Rotating shaft No. 2; 4031, Shaft seat; 404, Splicing assembly; 4041, Fixing sleeve; 4042, Slot; 4043, Fixing seat; 4044, Guide shaft No. 1; 4045, Compression spring; 4046, Splicing block; 4047, Insert block; 405, Receiving 4051. Wire reel; 406. Drive shaft; 407. Traction line; 408. Traction frame; 409. Moving seat; 410. Support seat; 411. Second guide shaft; 412. Placement seat; 413. Shaking spring; 414. Limiting groove; 415. Second connecting frame; 416. Pressing plate; 417. Sliding shaft; 418. Return spring; 419. Fixed frame; 500. Power cylinder; 501. Vertical frame; 502. First rotating seat; 503. Second rotating seat; 600. Sand box assembly; 601. Liquid inlet; 700. Shaking drive unit; 701. Drive sprocket; 702. Chain; 703. Driven sprocket; 704. Disc shaft; 705. Disc; 706. Wheel axle; 707. Roller. Detailed Implementation

[0052] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Please see Figures 1-9This application provides a submicron grinding center casting processing equipment, including a base 100, and a ladle 300 and a sand box assembly 600 located above the base 100. The ladle 300 is provided with a pouring port 301 and a filling port 302. The top of the sand box assembly 600 is provided with a filling port 601. By pouring molten iron into the sand box assembly 600, castings can be formed after cooling. Two mounting frames 200 symmetrically arranged on the sides of the ladle 300 are installed on the top surface of the base 100. A synchronous moving unit 400 is provided on the mounting frame 200. The synchronous moving unit 400 includes a first rotating shaft 401, a second rotating shaft 403, and a take-up reel 405. A transmission assembly 402 is provided between the first rotating shaft 401 and the second rotating shaft 403 for driving the first rotating shaft 401 and the second rotating shaft 403. 3. Rotating at the same linear speed; There are two No. 1 rotating shafts 401, and each No. 1 rotating shaft 401 is rotatably connected to a corresponding mounting bracket 200, and the end of the No. 1 rotating shaft 401 is fixedly connected to the outer wall of the ladle 300; The No. 2 rotating shaft 403 is rotatably mounted on the base 100 through a shaft seat 4031; A drive shaft 4051 is respectively provided on two sides of the take-up reel 405, and a set of splicing components 404 is provided between each drive shaft 4051 and the No. 2 rotating shaft 403 for connecting the No. 2 rotating shaft 403 and the drive shaft 4051; A traction line 406 is provided on the take-up reel 405, and the end of the traction line 406 away from the take-up reel 405 is connected to a moving seat 408 through a traction frame 407 for driving the injection port 601 to move directly below the discharge port 301.

[0054] Specifically, the alloy used for casting is melted into liquid iron in an intermediate frequency electric furnace. This liquid iron is then transferred from the inlet 302 to the ladle 300. Rotating the ladle 300 allows the molten iron to be poured out from the outlet 301 and into the sand box assembly 600, shaping the alloy into the form of the casting. During this process, the rotation of the ladle 300 drives the second rotating shaft 403 via the transmission assembly 402. The second rotating shaft 403, through the splicing assembly 404, drives the take-up reel 405 to wind up the wire. In other words, the traction wire 406 gradually winds onto the take-up reel 405 and is then pulled... The frame 407 moves each support base 409 directly below the pouring port 301. This means that as the ladle 300 rotates, it simultaneously drags the sand box assembly 600 on the support base 409, ensuring that the pouring port 601 is always directly below the pouring port 301. This maintains the sand box pouring port 601 and the pouring port 301 of the ladle 300 in a directly downward alignment, preventing molten iron from being poured onto the outer wall of the sand box. Compared to traditional fixed sand box equipment, this eliminates the need for manual adjustment of the ladle 300's position and calibration of the positions of the sand box pouring port 601 and the pouring port 301 of the ladle 300, thus reducing the workload.

[0055] Furthermore, each of the splicing components 404 includes a fixing sleeve 4041, a fixing seat 4043, and a splicing block 4046. The fixing sleeve 4041 is fixedly connected to the second rotating shaft 403, and slots 4042 are arranged in a ring array on the side of the fixing sleeve 4041 away from the second rotating shaft 403. The fixing seat 4043 is fixedly connected to the outer wall of the drive shaft 4051, and two first guide shafts 4044 are slidably arranged on the fixing seat 4043, symmetrically located on both sides of the drive shaft 4051. The splicing block 4046 is movably sleeved on the outside of the drive shaft 4051. It should be noted that, in order to facilitate the operation of the splicing block 4046, an additional... The design features anti-slip texture, and both guide shafts 4044 are fixedly connected to the sidewall of the splicing block 4046. The splicing block 4046 has a circular array of inserts 4047 arranged in the same number as the slots 4042 on its sidewall opposite to the guide shafts 4044. Each guide shaft 4044 has a compression spring 4045 fitted on its outer side. One end of the compression spring 4045 is connected to the fixing seat 4043, and the other end is connected to the splicing block 4046. The compression spring 4045 is used to press the inserts 4047 into the slots 4042, preventing the splicing block 4046 from moving and causing the inserts 4047 to detach from the slots 4042.

[0056] Specifically, by pulling the splicing block 4046, the insert block 4047 is pulled out from inside the slot 4042. Then, by manually rotating the drive shaft 4051, the take-up reel 405 can be rotated to adjust the traction line 406 to a taut state. After that, by inserting the insert block 4047 into the slot 4042, the problem of the traction line 406 only pulling the traction frame 407 and the moving seat 408 after the ladle 300 has rotated a certain angle due to deformation and lengthening caused by the material of the traction line 406 after multiple uses can be avoided. This prevents the liquid injection port 601 from moving to the liquid filling port 302 directly below the liquid pouring port according to the prescribed path due to the untimely movement of the moving seat 408.

[0057] Furthermore, the transmission assembly 402 includes a connecting block 4021; each end of the connecting block 4021 is provided with a rack 4022, each rack 4022 is meshed with a matching gear 4023, and one gear 4023 is fixedly connected to a first rotating shaft 401, and the other gear 4023 is fixedly connected to a second rotating shaft 403; a first connecting frame 201 is installed on the mounting bracket 200, and a sliding groove 202 is provided on the first connecting frame 201; the transmission assembly 402 also includes a slider 4024 installed on the connecting block 4021, and the transmission assembly 402 is slidably installed on the inner side of the sliding groove 202, which can play a limiting and guiding role. It should be noted that both the sliding groove 202 and the slider 4024 are dovetail-shaped, which plays a supporting and mounting role.

[0058] Specifically, when the ladle 300 rotates, the first rotating shaft 401 rotates synchronously, which in turn drives the second rotating shaft 403 on the first rotating shaft 401 to rotate, which drives the rack 4022 meshing with it to move, and through the transmission of the connecting block 4021 and another rack 4022, drives another gear 4023 to rotate, which in turn drives the second rotating shaft 403 to rotate. The second rotating shaft 403 drives the take-up reel 405 to rotate through the splicing assembly 404, which in turn drives the take-up reel 405 to perform the winding operation.

[0059] Furthermore, a support base 409 is provided on the top of the movable seat 408, and a second guide shaft 410 is provided at the four corners of the top surface of the support base 409. A placement seat 411 is slidably arranged on the second guide shaft 410 for placing the sand box assembly 600. Several rocking springs 412 are arranged in an array between the support base 409 and the placement seat 411. A limiting groove 413 adapted to the sand box assembly 600 is opened on the top surface of the placement seat 411, which can make the sand box assembly 600 placed on the placement seat 411 stuck inside the limiting groove 413, thereby achieving the positioning function, that is, it can make the horizontal position of the injection port 601 and the pouring port 301 also aligned.

[0060] Furthermore, a heightening frame is also installed on the base 100, and a wobbling drive unit 700 is installed on the heightening frame. The wobbling drive unit 700 includes a disc shaft 704 rotatably mounted on the heightening frame, and a disc 705 is eccentrically mounted on the disc shaft 704. A pressing plate 415 is connected to the side of the placement seat 411 through a second connecting frame 414, located directly below the disc 705. The wobbling drive unit 700 also includes a driving sprocket 701 and a driven sprocket 703. The driving sprocket 701 is fixedly mounted on a first rotating shaft 401, and the driven sprocket 703 is fixedly mounted on the disc shaft 704. The driving sprocket 701 and the driven sprocket 703 are connected by a chain 702. It should be noted that the radius of the driving sprocket 701 is larger than the radius of the driven sprocket 703, which can increase the number of rotations of the disc shaft 704 in a single trip.

[0061] Specifically, when the ladle 300 rotates, driving the first rotating shaft 401 to rotate, the drive sprocket 701, chain 702, and driven sprocket 703 drive the disc shaft 704 to rotate. The disc shaft 704 drives the disc 705 to rotate. Because the disc 705 is eccentrically positioned on the disc shaft 704, it can exert downward pressure on the pressing plate 415. This, in turn, presses the placement seat 411 downward through the second connecting frame 414. The rocking spring 412 can bounce the placement seat 411 up. Thus, during the process of injecting molten iron into the sand box assembly 600, the placement seat 411 drives the sand box assembly 600 on it to rock up and down rhythmically. This promotes more even filling of the cavity of the sand box assembly 600 with molten iron, which can reduce shrinkage cavities caused by uneven filling. At the same time, the dispersed micro-bubbles can be further discharged inside the mold, ensuring the quality of the casting.

[0062] Furthermore, the disc 705 is also provided with a plurality of axles 706 arranged in a circular array, and each axle 706 is provided with a roller 707 rotatably mounted on it. During the process of the disc 705 pressing the pressing plate 415, there will be a need for horizontal movement, thereby increasing the movement of the roller 707 on the pressing plate 415 and making its movement smooth.

[0063] Furthermore, the synchronous moving unit 400 also includes at least two sliding shafts 416 arranged parallel to each other on the base 100. The moving seat 408 is slidably connected to the sliding shafts 416 through an adapter groove. A return spring 417 is sleeved on the outer side of each sliding shaft 416. One end of the return spring 417 is connected to the base 100, and the other end of the return spring 417 is connected to the moving seat 408. During the unwinding process of the take-up reel 405, the elastic potential energy of the return spring 417 can drive the moving seat 408 to return to its original position.

[0064] Furthermore, the synchronous moving unit 400 also includes a fixing frame 418 disposed on the base 100. The fixing frame 418 is provided with a baffle 419 for positioning the moving seat 408 at the reset position. After the take-up reel 405 unwinds, the moving seat 408 returns to the initial position under the pull of the reset spring 417. However, due to the influence of the spring force when returning to the initial position, it will continuously pull the traction line 406, which may easily lead to the problem of the traction line 406 breaking. By adding a baffle 419 to the initial position of the moving seat 408 to block the moving seat 408, the above problem is avoided.

[0065] Furthermore, a vertical frame 501 is installed on the base 100, and a first rotating seat 502 is provided on the vertical frame 501. A power cylinder 500 is rotatably connected to the first rotating seat 502. A second rotating seat 503 is provided on the outer wall of the ladle 300. The output end of the power cylinder 500 is rotatably connected to the second rotating seat 503, so that the ladle 300 can be driven to rotate around the first rotating shaft 401 by the power cylinder 500.

[0066] Furthermore, the mounting bracket 200 is provided with a sleeve column 4011 located outside the first rotating shaft 401. A movable groove 4013 is provided through the sleeve column 4011 to limit the maximum angle of rotation of the ladle 300.

[0067] The mounting frame 200 is provided with a sleeve column 4011, located outside the first rotating shaft 401. A movable groove 4013 is provided through the sleeve column 4011 to limit the maximum angle of rotation of the ladle 300.

[0068] The mounting bracket 200 is provided with a sleeve post 4011 located outside the first rotating shaft 401. A movable groove 4013 is provided through the sleeve post 4011 to limit the maximum rotation angle of the ladle 300. A pressing block 4012 is provided on the outer wall of the first rotating shaft 401, located inside the movable groove 4013. A controller is also provided inside the movable groove 4013. The controller is electrically connected to the power cylinder 500. However, it should be noted that the power cylinder 500 is provided with an additional control switch. The controller inside the movable groove 4013 will only be triggered when the rotation angle of the ladle 300 is about to exceed the limit, so that the power cylinder 500 can be forcibly stopped when the ladle 300 rotates to the maximum angle.

[0069] A method for machining castings using a submicron grinding center includes the following steps:

[0070] S1. Prepare 90% pig iron, 5% scrap steel, and 5% ductile iron by mass percentage, mix them, and then put them into a smelting equipment for heating and melting into molten iron. During the process, alloying elements are added to adjust the composition of the molten iron to obtain modulated molten iron. The modulated molten iron is composed of the following components by mass percentage: C: 3.5%-3.7%, Si: 2.3%-2.5%, Mn: 0.4%-0.6%, P: ≤0.04%, S: ≤0.020%, Mg: 0.04%-0.05%, Cu: 0.5%-0.7%, Mo: 0.2%-0.3%, with the balance being Fe;

[0071] S2. Based on the casting structure, a cavity corresponding to the casting size is made in the sand box using molding sand. A gating system is opened in the molding sand in the sand box, and the gating system size is calculated based on the casting structure to obtain a sand box cavity that meets the standard.

[0072] S3. Transfer the molten iron prepared in S1 to the ladle, and then use the ladle to pour the molten iron into the injection port on the sand box into the mold cavity. The pouring temperature is 1360℃-1370℃.

[0073] S4. After gradually cooling and solidifying, the pre-machined casting blank is removed and subjected to four annealing processes to obtain the first shaped submicron grinding center casting.

[0074] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A sub-micron grinding center casting processing equipment, comprising a base (100), a ladle (300) and a sand box assembly (600) located above the base (100), a pouring opening (301) and a liquid adding opening (302) are arranged on the ladle (300), a liquid injection opening (601) is arranged on the top of the sand box assembly (600), two mounting frames (200) symmetrically arranged on the side of the ladle (300) are mounted on the top surface of the base (100), characterized in that, The mounting frame (200) is provided with a synchronous moving unit (400); wherein, The synchronous moving unit (400) comprises a first rotating shaft (401), a second rotating shaft (403) and a take-up reel (405), and a transmission assembly (402) is arranged between the first rotating shaft (401) and the second rotating shaft (403) for rotating the first rotating shaft (401) and the second rotating shaft (403) at the same linear speed; The first rotating shaft (401) is provided with two, and each first rotating shaft (401) is rotatably connected to a corresponding mounting frame (200), and the end of the first rotating shaft (401) is fixedly connected to the outer wall of the ladle (300); The second rotating shaft (403) is rotatably mounted on the base (100) through a shaft seat (4031); Two sides of the take-up reel (405) are respectively provided with a transmission shaft (4051), and a set of splicing assemblies (404) is arranged between each transmission shaft (4051) and the second rotating shaft (403) for connecting the second rotating shaft (403) and the transmission shaft (4051); The take-up reel (405) is provided with a traction line (406), one end of the traction line (406) away from the take-up reel (405) is connected with a moving seat (408) through a traction frame (407) for driving the liquid injection port (601) to move to the directly below the liquid pouring port (301) for discharging; The transmission assembly (402) comprises a connecting block (4021); Both ends of the connecting block (4021) are respectively provided with a rack (4022), and each rack (4022) is engaged with a matching gear (4023), and one of the gears (4023) is fixedly connected to the first rotating shaft (401), and the other gear (4023) is fixedly connected to the second rotating shaft (403); A first connecting frame (201) is mounted on the mounting frame (200), and a sliding groove (202) is formed in the first connecting frame (201); The transmission assembly (402) further comprises a sliding block (4024) mounted on the connecting block (4021), and the transmission assembly (402) is slidingly installed on the inner side of the sliding groove (202); A supporting seat (409) is arranged on the top of the moving seat (408), four corner positions on the top surface of the supporting seat (409) are provided with second guide shafts (410), a placing seat (411) is slidingly arranged on the second guide shafts (410) for placing the sand box assembly (600), and a plurality of shaking springs (412) are arranged between the supporting seat (409) and the placing seat (411); A limiting groove (413) matched with the sand box assembly (600) is formed in the top surface of the placing seat (411); An increasing frame is further mounted on the base (100), a shaking driving unit (700) is mounted on the increasing frame, the shaking driving unit (700) comprises a disc shaft (704) rotatably arranged on the increasing frame, and a disc (705) is eccentrically arranged on the disc shaft (704); The side of the placing seat (411) is connected with a pressing plate (415) through a second connecting frame (414) and is located directly below the disc (705); The shaking driving unit (700) further comprises a driving sprocket (701) and a driven sprocket (703), the driving sprocket (701) is fixedly installed on the first rotating shaft (401), the driven sprocket (703) is fixedly installed on the disc shaft (704), and the driving sprocket (701) and the driven sprocket (703) are drivingly connected through a chain (702); A plurality of wheel shafts (706) are further arranged in an annular array on the disc (705), and a roller (707) is rotatably arranged on each wheel shaft (706).

2. A sub-micron grinding center casting machining apparatus according to claim 1, characterized in that, Each set of the splicing assembly (404) comprises a fixed sleeve (4041), a fixed seat (4043) and a splicing block (4046); The fixed sleeve (4041) is fixedly connected to the second rotating shaft (403), and a plurality of insertion grooves (4042) are arranged in an annular array on the side of the fixed sleeve (4041) away from the second rotating shaft (403); The fixed seat (4043) is fixedly connected to the outer wall of the transmission shaft (4051), two first guide shafts (4044) are slidably arranged on the fixed seat (4043) and symmetrically located on the two sides of the transmission shaft (4051), the splicing block (4046) is movably sleeved on the outer side of the transmission shaft (4051), and the two first guide shafts (4044) are fixedly connected to the side wall of the splicing block (4046), and a plurality of insertion blocks (4047) are arranged in an annular array on the side wall of the splicing block (4046) away from the first guide shaft (4044) and have the same number as the insertion grooves (4042) and are used in cooperation; An extrusion spring (4045) is sleeved on the outer side of each first guide shaft (4044), one end of the extrusion spring (4045) is connected to the fixed seat (4043), and the other end of the extrusion spring (4045) is connected to the splicing block (4046).

3. A sub-micron grinding center casting machining apparatus according to claim 1, characterized in that, The synchronous moving unit (400) further comprises at least two slide shafts (416) arranged in parallel on the base (100), and the moving seat (408) is slidably connected to the slide shaft (416) through an adaptive slot; A reset spring (417) is sleeved on the outer side of each slide shaft (416), one end of the reset spring (417) is connected to the base (100), and the other end of the reset spring (417) is connected to the moving seat (408); The synchronous moving unit (400) further comprises a fixing frame (418) arranged on the base (100), and the fixing frame (418) is provided with a baffle (419) for positioning the reset position of the moving seat (408).

4. A sub-micron grinding center casting machining apparatus according to claim 1, characterized in that, A vertical frame (501) is arranged on the base (100), a first rotating seat (502) is arranged on the vertical frame (501), and a power cylinder (500) is rotatably connected to the first rotating seat (502). The outer wall of the ladle (300) is provided with a second rotating seat (503), and the output end of the power cylinder (500) is rotationally connected with the second rotating seat (503).

5. A sub-micron grinding center casting machining apparatus according to claim 1, wherein, The mounting frame (200) is provided with a sleeve column (4011) located outside the first rotating shaft (401), the sleeve column (4011) is provided with a movable groove (4013) penetrating therethrough, and the outer wall of the first rotating shaft (401) is provided with a pressing block (4012) located inside the movable groove (4013).

6. A method of machining a sub-micron grinding center casting, characterized by, The sub-micron grinding center casting processing equipment is applied to any one of claims 1-5, comprising the following steps: S1. 90% of pig iron, 5% of scrap steel and 5% of ductile iron are mixed according to the mass percentage, and then are put into a melting device to heat and melt into molten iron. Alloying element materials are added to control the composition of the molten iron during the process, and the resulting molten iron is obtained. The molten iron is composed of the following components in mass percentage: C: 3.5%-3.7%, Si: 2.3%-2.5%, Mn: 0.4%-0.6%, P: ≤0.04%, S: ≤0.020%, Mg: 0.04%-0.05%, Cu: 0.5%-0.7%, Mo: 0.2%-0.3%, and the balance is Fe; S2. According to the structure of the casting, a mold cavity corresponding to the size of the casting is prepared by using sand in a sand box. A sprue is formed in the sand in the sand box, and the size of the sprue is calculated according to the structure of the casting to obtain a sand box mold cavity that meets the standard; S3. The molten iron in S1 is transferred to a ladle, and then the molten iron is poured into the mold cavity through the pouring opening on the sand box using the ladle, and the pouring temperature is 1360-1370℃; S4. After gradually cooling and forming, the initially processed casting embryo is taken out, and the casting embryo is subjected to four annealing treatments, and the first annealing treatment obtains a formed sub-micron grinding center casting.

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