Multi-station horizontal rotary centrifugal casting grinding ball production device and working method thereof

Abstract

The application relates to a multi-station horizontal rotary centrifugal casting grinding ball production device and a working method thereof, and belongs to the mechanical field. The application comprises a multi-station disc device, multiple sets of horizontal rotary centrifugal casting grinding ball unit devices and multiple sets of grinding ball tooling molds. The horizontal rotary centrifugal casting grinding ball unit device is provided with multiple sets of horizontal rotary centrifugal casting device stations, the multi-station disc device is provided with multiple sets of horizontal rotary centrifugal casting grinding ball unit devices, and each set of horizontal rotary centrifugal casting grinding ball unit device is provided with a grinding ball tooling mold matched with the horizontal rotary centrifugal casting grinding ball unit device and used for producing grinding balls with different sizes. The application has the advantages of reasonable structure design, safety and reliability, high production efficiency, high automation degree, energy-saving production of centrifugal casting grinding balls, compact internal organization of the centrifugal casting grinding balls, good performance consistency, convenient operation and meeting the use requirements.

Description

Technical Field

[0001] This invention relates to an apparatus and its working method, and more particularly to a multi-station horizontal rotary centrifugal casting grinding ball production apparatus and its working method. It is equipment used for casting grinding balls and belongs to the field of machinery. Background Technology

[0002] Cast grinding balls are widely used in industries such as building materials, power generation, and mining. They are consumables with huge annual consumption. The common casting process for grinding balls is gravity casting, typically employing metal molds, shell molds, iron molds with sand coating, lost foam casting, and resin sand casting. Due to the nature of the casting process, this method results in a lower yield of molten iron, and the cast balls often have internal defects or a significant difference in hardness between the outer surface and the inner core of the ball.

[0003] Horizontal rotary centrifugal casting of grinding balls is a metal mold casting method. Unlike gravity casting, it utilizes the centrifugal force generated by horizontal rotation. Its ability to fill the mold with molten iron and to provide liquid feeding to the molten iron poured into the casting cavity far surpasses the filling and feeding capabilities of gravity casting. With breakthroughs in tooling and mold design, the production of horizontal rotary centrifugal casting of grinding balls has gradually entered the stage of industrial-scale production. Developing the mechanization and automation levels of equipment for producing horizontal rotary centrifugal casting grinding balls, and improving its production efficiency, has become one of the key aspects of applying this technology to production.

[0004] Horizontal centrifugal casting is a special type of casting. Its process is characterized by horizontally parted metal molds. Molten iron is poured into the mold cavity under the action of horizontal centrifugal force through horizontal rotation. During the subsequent cooling and solidification process, the injected molten iron is liquid-filled to obtain a dense casting.

[0005] The concept of horizontal rotary centrifugal casting of grinding balls has been around for a long time, but its industrial application has remained stagnant because problems such as the structure of casting tooling molds, casting pouring methods or pouring systems, and production equipment have not been well resolved.

[0006] Chinese patent CN216263388U, published on April 12, 2022, discloses an invention patent entitled "A Mold Device for Horizontal Rotation Centrifugal Casting of Grinding Balls." This patent solves the problem of separating the grinding balls from the mold, and is completely different from the mold in this application, making them incomparable. Moreover, it is impossible to use in production, mainly because the mold manufacturing cost is too high and its lifespan is very short.

[0007] Therefore, it is particularly necessary to provide a solution that can address the process issues and tooling problems associated with horizontally rotating centrifugal casting of grinding balls. Summary of the Invention

[0008] The purpose of this invention is to overcome the above-mentioned shortcomings in the prior art and to provide a multi-station horizontal rotary centrifugal casting grinding ball production device and its working method that has a reasonable structural design, is safe and reliable, has high production efficiency and high degree of automation, can realize energy-saving production of centrifugal casting grinding balls, and produces centrifugal casting grinding balls with dense internal structure, good performance consistency, and convenient operation.

[0009] The technical solution adopted by this invention to solve the above problems is as follows: The multi-station horizontal rotary centrifugal casting grinding ball production device includes a multi-station disc device, characterized in that it further includes multiple sets of horizontal rotary centrifugal casting grinding ball unit devices and multiple sets of grinding ball tooling molds. Each horizontal rotary centrifugal casting grinding ball unit device includes multiple horizontal rotary centrifugal casting station devices. Multiple sets of horizontal rotary centrifugal casting grinding ball units are arranged on the multi-station disc device, and each set of horizontal rotary centrifugal casting grinding ball units is equipped with tools for producing grinding balls of different sizes. Grinding ball tooling mold; Multi-station disc device includes a multi-station turntable, a multi-station turntable support base, a base, a rotating shaft, a turntable rotating bevel gear set, a rotary motor and a reduction mechanism. The multi-station turntable is used to install a horizontal rotating centrifugal casting grinding ball unit. The multi-station turntable can rotate clockwise or counterclockwise with the multi-station turntable support base. The motor and reduction mechanism are fixedly installed on the base. The turntable rotating bevel gear set is connected to the rotating shaft installed on the multi-station turntable support base. As the motor and reduction mechanism rotate or stop, they drive the multi-station turntable to rotate in a circle or stop.

[0010] Multiple sets of horizontal rotary centrifugal casting grinding ball unit devices each include a lifting and locking hydraulic cylinder, a worktable, a guide sleeve, a horizontal centrifugal rotary power mechanism, a centrifugal rotating disk, a centrifugal rotating disk cam, an upper beam, and a column. The column, lifting and locking hydraulic cylinder, and guide sleeve are all mounted on the multi-station rotating disk of the multi-station disc device. The piston rod head of the lifting and locking hydraulic cylinder is connected to the worktable. The horizontal centrifugal rotary power mechanism, centrifugal rotating disk, and centrifugal rotating disk cam are mounted on the worktable. The centrifugal rotating disk and centrifugal rotating cam are used to support the upper and lower metal molds and to make the upper and lower metal molds rotate synchronously with the rotation of the centrifugal rotating disk, thereby generating a centrifugal grinding ball. The tooling for grinding balls consists of an upper metal mold and a lower metal mold. The lower metal mold includes a rotating groove and a tilting hinge. One side of the bottom surface of the lower metal mold is hinged to the centrifugal rotating disk via the tilting hinge. The tilting angle between the lower surface of the lower metal mold and the upper surface of the centrifugal rotating disk is 30°–45°, with the tilting hinge as the center. A centrifugal rotating disk rotating protrusion is installed on the centrifugal rotating disk, and the bottom of the lower metal mold is equipped with a rotating groove coupled to it. When the lifting and locking hydraulic cylinder is raised, the two are coupled together, and the metal mold can rotate with the centrifugal rotating disk to realize the production of horizontally rotating centrifugal casting grinding balls.

[0011] Preferably, the horizontal rotating centrifugal casting grinding ball unit device of the present invention further includes universal pressure rollers, and four universal pressure rollers are mounted on the lower plane of the upper beam.

[0012] Preferably, the present invention has four columns, the upper ends of which are fixed together with the upper beam to form a frame structure.

[0013] Preferably, the horizontal rotary centrifugal casting grinding ball unit device of the present invention further includes a worktable guide rod, and four worktable guide rods are installed on the worktable. The worktable guide rods can move up and down in the guide sleeve on the multi-station turntable.

[0014] Preferably, the horizontal rotating centrifugal casting grinding ball unit device of the present invention further includes an upper metal mold parting support block, and an upper metal mold parting support block is fixedly installed at the same height position on the side of each of the four columns; the upper metal mold parting support block is used for the opening and parting of the upper metal and the lower metal.

[0015] Preferably, the horizontal rotary centrifugal casting grinding ball unit device of the present invention further includes a lower metal mold tilting block. A lower metal mold tilting block is fixedly installed at a certain height on the side of each of the two columns inside the multi-station turntable. The lower metal mold tilting block is used to tilt the lower metal mold so as to facilitate the separation of the solidified grinding ball from the lower metal mold.

[0016] Preferably, the horizontal rotary centrifugal casting grinding ball unit device, grinding ball tooling mold and horizontal rotary centrifugal casting device station of the present invention are all six sets; the number of stations can be set according to the production process and operating cycle.

[0017] Preferably, the multi-station disc device of the present invention is a multi-station disc device with its own power to rotate.

[0018] This invention also provides a working method for a multi-station horizontal rotary centrifugal casting grinding ball production device, characterized in that: station one is a molten iron pouring station, station two is a molten iron centrifugal filling station, station three is a molten iron cooling and solidification station, station four is a cooling and solidification station, station five is a metal upper and lower mold opening and grinding ball removal station, and station six is ​​a metal upper and lower mold air blowing cleaning, mold closing, and locking station; the rotary operation is a rhythmic rotary operation, using counterclockwise rotation;

[0019] The specific steps of the horizontal rotary centrifugal casting production process for grinding balls are as follows: The multi-station turntable stops rotating, and molten iron is poured into the horizontal rotary centrifugal casting grinding ball unit at station one, where the mold is already closed and the horizontal rotary centrifugal casting speed has been reached. At this station, the required molten iron for the forming metal mold is quickly poured in. Under the action of centrifugal force, the molten iron gradually fills the grinding ball cavity of the metal mold. Then, the multi-station turntable rotates counterclockwise by one station angle, moving the unit to station two and stopping. At this station, the molten iron in the metal mold continues to fill the grinding ball cavity under the action of centrifugal force. The molten iron and the metal mold are in seamless contact, continuously cooling down. When the temperature of the molten iron at the contact point with the grinding ball cavity surface drops to the solidification temperature, the molten iron at this point begins to solidify and gradually expands towards the central spherical cavity of the turntable. The multi-station turntable continues to rotate by one station angle and stops, and the unit moves to station three. At this station, the molten iron has completely filled the grinding ball cavity. The grinding ball cavity in the unit metal mold is filled, and the molten iron in the grinding ball cavity is continuously cooling and solidifying. Meanwhile, the remaining molten iron in the annular casting container continues to replenish the liquid state of the grinding ball cavity under the action of centrifugal force. Then, the multi-station turntable continues to rotate one station angle and then stops. The unit enters station four. At this station, the molten iron in the grinding ball cavity continues to cool, completing the transformation from liquid to solid and completely solidifying. The remaining molten iron in the annular casting container also completes the liquid replenishment of the grinding ball cavity. The grinding balls in the metal mold cavity continue to cool. At this station, the horizontal rotary motor of the unit is de-energized. Under the action of inertia, the multi-station turntable of the unit continues to rotate and gradually decelerates. The lifting and locking hydraulic cylinder descends, driving the upper and lower metal molds to descend to a certain distance. At this time, the upper surface of the upper metal mold gradually separates from the four universal pressure rollers. The upper and lower metal molds are no longer in the locked state, but the upper and lower metal molds are still in the mold-closed state.Then the multi-station turntable continues to rotate one station angle and stops. The unit enters station five. The multi-station turntable gradually decelerates to the minimum speed. Finally, through the action of sensor signals, the hinge position of the lower metal mold is rotated to a position perpendicular to the radius of the multi-station turntable at this station and stops. That is, the center line of the grinding ball model is completely aligned with the center line of the disc. The motor brake is activated, and the multi-station turntable stops rotating and remains stationary. At this time, the grinding balls in the metal mold cavity have cooled to below 500°C. The upper and lower metal mold lifting and locking hydraulic cylinders of this unit descend again to begin the upper and lower metal mold operation. The locking hydraulic cylinder descends, driving the upper and lower metal molds to descend. When the lower plane of the upper metal mold edge touches the upper plane of the four upper metal mold parting support blocks installed on the four columns, the upper metal mold stops descending. The lower metal mold and the grinding balls in the cavity continue to descend with the lifting and locking hydraulic cylinder. When the lower plane of one end of the lower metal mold touches the lower metal mold tilting block installed on the two columns, the lower metal mold at this position... The lower metal mold stops descending, while the other end of the lower metal mold continues to descend along with the centrifugal rotating disk, driven by the tilting hinge of the lower metal mold. The rotating groove on the lower surface of the lower metal mold, coupled with the rotating protrusion on the upper surface of the centrifugal rotating disk, gradually disengages completely. When the lifting and locking hydraulic cylinder reaches its lowest position, the lower metal mold is tilted at 30°–45°, allowing the grinding balls to be easily separated from the cavity of the lower metal mold manually or mechanically. Then, the multi-station turntable continues to rotate one station angle before stopping, and the unit enters station six. At this station, the upper and lower metal molds can be cleaned by blowing. After this operation, the upper and lower metal molds can be locked. This operation is the reverse of the loosening operation at station five, and will not be elaborated further here. After the locking operation is completed, the rotary motor and reduction mechanism begin to rotate to the speed required for centrifugal force; then, the next production cycle begins.

[0020] Compared with existing technologies, this invention has the following advantages and effects: 1) The overall structure is reasonably designed, safe and reliable, and enables mass production of horizontally rotating centrifugal casting grinding balls; 2) The operation of each station on the device is clearly defined, and it operates according to the rhythm, resulting in high production efficiency; 3) The entire production process has a high degree of mechanization and automation; 4) With the addition of molten iron casting equipment, unmanned or minimally manned centrifugal casting grinding ball production can be achieved; 5) The molten iron utilization rate of this production technology is high, enabling energy-saving production of centrifugal casting grinding balls; 6) The produced centrifugal casting grinding balls have a dense internal structure and good performance consistency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a general-purpose horizontal rotating centrifugal casting grinding ball device.

[0022] Figure 2Schematic diagram of the multi-station horizontal rotary centrifugal casting grinding ball device according to an embodiment of the present invention Figure 1 .

[0023] Figure 3 Schematic diagram of the multi-station horizontal rotary centrifugal casting grinding ball device according to an embodiment of the present invention Figure 2 .

[0024] Figure 4 A schematic diagram of the multi-station rotating disk device according to an embodiment of the present invention.

[0025] Figure 5 A schematic diagram of the ball casting unit structure of the multi-station horizontal rotary centrifugal casting grinding ball device according to an embodiment of the present invention.

[0026] Figure 6 Schematic diagram of the upper metal mold in the mold structure for multi-station horizontal rotary centrifugal casting grinding ball production according to the embodiments of the present invention. Figure 1 .

[0027] Figure 7 Schematic diagram of the upper metal mold in the mold structure for multi-station horizontal rotary centrifugal casting grinding ball production according to the embodiments of the present invention. Figure 2 .

[0028] Figure 8 Schematic diagram of the lower metal mold in the mold structure for multi-station horizontal rotary centrifugal casting grinding ball production according to an embodiment of the present invention. Figure 1 .

[0029] Figure 9 Schematic diagram of the lower metal mold in the mold structure for multi-station horizontal rotary centrifugal casting grinding ball production according to an embodiment of the present invention. Figure 2 .

[0030] Figure 10 A schematic diagram of the grinding ball production process of the multi-station horizontal rotary centrifugal casting grinding ball production device and its matching mold in an embodiment of the present invention.

[0031] Figure 11 This is a schematic diagram of the structure of workstation one in the production process of an embodiment of the present invention.

[0032] Figure 12 This is a schematic diagram of the structure of workstation two in the production process of this embodiment of the invention.

[0033] Figure 13 This is a schematic diagram of the structure of workstation three in the production process of an embodiment of the present invention.

[0034] Figure 14 This is a schematic diagram of the structure of workstation four in the production process of this embodiment of the invention.

[0035] Figure 15 This is a schematic diagram of the structure of workstation five in the production process of an embodiment of the present invention.

[0036] Figure 16 This is a schematic diagram of the structure of workstation six in the production process of an embodiment of the present invention.

[0037] Figure 1 In the middle: centrifugal rotating ball casting device 1-1, upper metal mold 1-2, lower metal mold 1-3, locking bolt 1-4, fixing bolt 1-5.

[0038] Figure 2-16 In the middle: Multi-station disc device 1, horizontal rotating centrifugal casting grinding ball unit device 2, horizontal rotating centrifugal casting device station 2-1, grinding ball tooling mold 3;

[0039] Multi-station rotary device 1: multi-station turntable 101, multi-station turntable support 102, base 103, rotating shaft 104, turntable rotating bevel gear set 105, rotary motor and reduction mechanism 106;

[0040] Horizontal Rotary Centrifugal Casting Grinding Ball Unit Device 2: Lifting and Locking Hydraulic Cylinder 201, Worktable 202, Worktable Guide Rod 203, Guide Sleeve 204, Horizontal Centrifugal Rotation Power Mechanism 205, Lower Metal Mold Tilting Stop 206, Upper Metal Mold Parting Support Stop 208, Centrifugal Rotating Disc 209, Centrifugal Rotating Disc Rotating Protrusion 210, Upper Beam 212, Column 213, Universal Pressure Roller 214;

[0041] Multiple sets of grinding ball tooling molds 3: upper metal mold 31, lower metal mold 32;

[0042] Upper metal mold 31: Upper metal mold body 310, upper metal running edge 311, elongated pin hole 312, molten iron injection cavity 313, inner gate 314, grinding ball inner cavity 315, grinding ball parting surface 316, upper metal mold parting surface 317.

[0043] Lower metal mold 32: Lower metal mold body 320, rotating positioning pin 321, molten iron injection cavity 2 322, inner gate 1 323, grinding ball inner cavity 2 324, grinding ball parting surface 2 325, lower metal mold parting surface 326, lower metal mold rotating groove 327, lower metal mold tilting hinge 328.

[0044] Workstation 1 G1, Workstation 2 G2, Workstation 3 G3, Workstation 4 G4, Workstation 5 G5, Workstation 6 G6. Detailed Implementation

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0046] Example

[0047] See Figures 2 to 16The multi-station horizontal rotary centrifugal casting grinding ball production device in this embodiment includes a multi-station disc device 1, multiple sets of horizontal rotary centrifugal casting grinding ball unit devices 2, and multiple sets of grinding ball tooling molds 3. The multiple sets of horizontal rotary centrifugal casting grinding ball unit devices 2 are provided with multiple sets of horizontal rotary centrifugal casting device stations 2-1. Multiple sets of horizontal rotary centrifugal casting grinding ball units are provided on the multi-station disc device 1. Each set of horizontal rotary centrifugal casting grinding ball units is provided with grinding ball tooling molds 3 that are matched with it to produce grinding balls of different sizes.

[0048] See Figures 2-3 In this embodiment, multiple sets of horizontal rotating centrifugal casting grinding ball units can be fixedly installed on the multi-station disc device 1 in equal divisions (four, six, eight, ten, etc.), and each set of horizontal rotating centrifugal casting grinding ball units is equipped with a matching grinding ball tooling mold 3 for producing grinding balls of different sizes.

[0049] See Figure 4 This embodiment of the multi-station rotary disc device 1 includes a multi-station turntable 101, a multi-station turntable support 102, a base 103, a rotating shaft 104, a turntable rotating bevel gear set 105, a rotary motor and a reduction mechanism 106. The multi-station turntable 101 is used to mount a horizontal rotating centrifugal casting grinding ball unit. The multi-station turntable 101 can rotate clockwise or counterclockwise with the multi-station turntable support 102. The rotation transmission device of the multi-station turntable 101 includes a rotary motor and a reduction mechanism 106, a turntable rotating bevel gear set 105, etc. The rotary motor and the reduction mechanism 106 are fixed on the base 103, and its output shaft is fixedly connected to one of the bevel gears. This gear is meshed with the bevel gear on the rotating shaft 104 mounted on the multi-station turntable support 102. As the rotary motor and the reduction mechanism 106 rotates or stops, it drives the multi-station turntable 101 to rotate in a circular motion or stop.

[0050] See Figures 6-9 In this embodiment, multiple sets of grinding ball tooling molds 3 all include an upper metal mold 31 and a lower metal mold 32. The upper metal mold 31 includes an upper metal mold body 310, an upper metal running edge 311, a long hole pin hole 312, a molten iron injection cavity 313, an inner gate 314, a grinding ball inner cavity 315, a grinding ball parting surface 316, and an upper metal mold parting surface 317. Among them, the molten iron injection cavity 313, the inner gate 314, the grinding ball inner cavity 315, the grinding ball parting surface 316, and the upper metal mold parting surface (317) are used for the casting and forming of the grinding ball; the upper metal running edge 311 and the long hole pin hole 312 are used for the assembly, separation, positioning, and rotation of the upper metal mold 31 and the lower metal mold 32.

[0051] In this embodiment, the lower metal mold 32 includes a lower metal mold body 320, a rotating positioning pin 321, a second molten iron injection cavity 322, a second ingate 323, a second grinding ball inner cavity 324, a second grinding ball parting surface 325, a lower metal mold parting surface 326, a lower metal mold rotating groove 327, and a lower metal mold tilting hinge 328. The second molten iron injection cavity 322, the second ingate 323, the second grinding ball inner cavity 324, the second grinding ball parting surface 325, and the lower metal mold parting surface 326 are used for forming the grinding ball. The rotating positioning pin 321, the lower metal mold rotating groove 327, and the lower metal mold tilting hinge 328 are used for the assembly, separation, positioning, rotation, and separation of the grinding ball from the lower metal mold 32 of the upper metal mold 31 and the lower metal mold 32.

[0052] See Figure 5 In this embodiment, the horizontal rotating centrifugal casting grinding ball unit device 2 includes a lifting and locking hydraulic cylinder 201, a worktable 202, a worktable guide rod 203, a guide sleeve 204, a horizontal centrifugal rotating power mechanism 205, a lower metal mold tilting stop 206, an upper metal mold parting support stop 208, a centrifugal rotating disk 209, a centrifugal rotating disk protrusion 210, an upper beam 212, a column 213, and a universal pressure roller 214. The column 213, the lifting and locking hydraulic cylinder 201, the guide sleeve 204, etc. are installed on the multi-station turntable 101 of the multi-station disc device 1. The multi-station turntable 101 can be equipped with multiple sets of horizontal rotating centrifugal casting grinding ball units according to the requirements of production efficiency, cycle time, etc.

[0053] In this embodiment, the piston rod head of the lifting and locking hydraulic cylinder 201 is fixedly connected to the worktable 202. A horizontal centrifugal rotation power mechanism 205, a centrifugal rotating disk 209, and a centrifugal rotating disk protrusion 210 are fixedly installed on the worktable 202.

[0054] In this embodiment, the other end of the lower metal mold tilting hinge 328 is connected to the bottom surface of the lower metal mold 32. The centrifugal rotating disk 209 and the centrifugal rotating disk protrusion 210 are used to support the upper metal mold 31 and the lower metal mold 32, and to make the upper metal mold 31 and the lower metal mold 32 rotate synchronously with the rotation of the centrifugal rotating disk 209, thereby generating centrifugal force.

[0055] In this embodiment, the upper ends of the four columns 213 are fixed together with the upper beam 212 to form a frame structure. Four universal pressure rollers 214 are installed on the lower plane of the upper beam 212. When pouring molten iron, they are used to tightly close the upper metal mold 31 and the lower metal mold 32 together to prevent the molten iron from leaking out from the parting surface of the upper metal mold 31 and the lower metal mold 32 under the action of centrifugal force.

[0056] In this embodiment, a metal-type split support block 208 is fixedly installed at the same height position on the sides of the four columns 213 for the purpose of separating the upper and lower metal parts.

[0057] In this embodiment, four workbench guide rods 203 are fixedly installed on the workbench 202. The workbench guide rods 203 can move up and down in the guide sleeves 204 installed on the multi-station turntable 101. The workbench guide rods 203 are used to prevent the workbench from rotating during operation. One side of the bottom surface of the lower metal mold 32 is hinged to the centrifugal rotating disk 209 through the lower metal mold tilting hinge 328. The tilting angle between the lower metal mold 32 and the upper surface of the centrifugal rotating disk 209 is 30°-45° with the lower metal mold tilting hinge 328 as the center.

[0058] In this embodiment, a lower metal mold tilting block 206 is fixedly installed at a certain height on the sides of the two columns 213 inside the multi-station turntable 101. The lower metal mold tilting block 206 is used to tilt the lower metal mold 32 so that the solidified grinding ball can be separated from the lower metal mold 32.

[0059] In this embodiment, a centrifugal rotating disc protrusion 210 is installed on the centrifugal rotating disc 209, and a lower metal mold rotating groove 327 coupled with it is provided at the bottom of the lower metal mold 32. When the lifting and locking hydraulic cylinder 201 is raised, the two are coupled together, and the metal mold can rotate together with the centrifugal rotating disc 209 to realize the production of horizontal rotating centrifugal casting grinding balls.

[0060] The working process of the multi-station horizontal rotary centrifugal casting grinding ball production device in this embodiment is described in [reference needed]. Figures 10-16 As shown, the multi-station horizontal rotary centrifugal casting grinding ball device and its matching molds have six stations, and the number of stations can be set according to the production process and operating cycle. Station 1 G1 is the molten iron pouring station, station 2 G2 is the molten iron centrifugal filling station, station 3 G3 is the molten iron cooling and solidification station, station 4 G4 is the cooling and solidification station, station 5 G5 is the metal upper and lower mold opening and grinding ball removal station, and station 6 G6 is the metal upper and lower mold blowing cleaning, mold closing, and locking station.

[0061] The rotary operation is a rhythmic rotary operation, which is counterclockwise. That is, after the multi-station turntable 101 rotates by one station angle, it stops rotating for a certain period of time, and then rotates by one station angle again, and so on in a cycle.

[0062] The horizontal rotary centrifugal casting process for grinding balls is as follows: The multi-station turntable 101 stops rotating. Molten iron is poured into the horizontal rotary centrifugal casting grinding ball unit at station one (G1), where the mold is closed and the casting speed has been reached. At this station, the required molten iron for the mold is quickly poured in. Under the action of centrifugal force, the molten iron gradually fills the grinding ball cavity of the mold. Then, the multi-station turntable 101 rotates counterclockwise by one station angle, moving the unit to station two (G2) and stopping. At this station, the molten iron in the mold continues to fill the grinding ball cavity under the action of centrifugal force. The molten iron and the mold are in seamless contact, continuously cooling. When the temperature of the molten iron at the contact point with the grinding ball cavity surface drops to the solidification temperature (at the outermost surface of the grinding ball), the molten iron begins to solidify and gradually expands towards the central cavity of the turntable. The multi-station turntable 101 continues to rotate by one station angle and stops. This unit then enters station three (G3). At this station, the molten iron has completely filled the grinding ball cavity. The grinding ball cavity in the unit metal mold is filled, and the molten iron in the grinding ball cavity is continuously cooling and solidifying. Meanwhile, the remaining molten iron in the annular casting vessel continues to replenish the liquid state of the grinding ball cavity under centrifugal force. Then, the multi-station turntable 101 rotates one station angle and stops, and the unit enters station four G4. At this station, the molten iron in the grinding ball cavity continues to cool, completing the transformation from liquid to solid and fully solidifying. The remaining molten iron in the annular casting vessel also completes the liquid replenishment of the grinding ball cavity. As the metal mold cavity continues to cool, the horizontal rotary motor of this unit is de-energized at this station. Under the action of inertia, the multi-station turntable 101 of this unit continues to rotate and gradually decelerates. The lifting and locking hydraulic cylinder 201 descends, driving the upper metal mold 31 and the lower metal mold 32 to descend to a certain distance. At this time, the upper surface of the upper metal mold gradually separates from the four universal pressure rollers. The upper metal mold 31 and the lower metal mold 32 are no longer in the locking state, but the upper metal mold 31 and the lower metal mold 32 are still in the mold closing state.Then, the multi-station turntable 101 continues to rotate one station angle and stops. This unit enters station five (G5). The multi-station turntable 101 gradually decelerates to its minimum speed, and finally, through the action of sensor signals, the hinge position of the lower metal mold rotates to a position perpendicular to the radius of the multi-station turntable 101 at this station and stops. That is, the center line of the grinding ball model is completely aligned with the center line of the disc. The motor brake is activated, and the multi-station turntable 101 stops rotating and remains stationary. At this time, the grinding balls in the metal mold cavity have cooled to below 500°C. The upper metal mold 3 of this unit... 1. The lower metal mold 32 lifting and locking hydraulic cylinder 201 descends again, and the upper metal mold 31 and lower metal mold 32 operation begins. The locking hydraulic cylinder 201 descends, driving the upper metal mold 31 and lower metal mold 32 to descend. When the lower plane of the upper metal running edge 311 touches the upper plane of the four upper metal mold parting support blocks 208 installed on the four columns, the upper metal mold 31 stops descending. The lower metal mold 32 and the grinding ball in the cavity continue to descend with the lifting and locking hydraulic cylinder 201. When the lower plane of one end of the lower metal mold 32 touches the upper plane of the four upper metal mold parting support blocks 208 installed on the four columns, the upper metal mold 31 stops descending. Figure 5 The lower metal type tilting stop 206 on the two columns prevents the lower metal type 32 from descending further. Meanwhile, the other end of the lower metal type 32 continues to descend along with the centrifugal rotating disk 209, driven by the lower metal type tilting hinge 328 of the lower metal type 32. The lower metal type rotating groove 327 on the lower surface of the lower metal type 32 gradually disengages from the centrifugal rotating disk rotating protrusion 210 on the upper surface of the centrifugal rotating disk 209, which is coupled to the lower metal type rotating groove 327 on the lower surface of the lower metal type 32. When the lifting and locking hydraulic cylinder 201 descends to its lowest position, the lower metal type 32 is at a 30°–45° angle. In an inclined state, the grinding balls can be easily separated from the cavity of the lower metal mold 32 by manual or mechanical means; then the multi-station turntable 101 continues to rotate one station angle and stops, and the unit enters station six G6, where the upper and lower metals can be blown cleaned. After the operation is completed, the upper metal mold 31 and the lower metal mold 32 can be locked. This operation is the reverse operation of the loosening operation at station five G5, which will not be described in detail here. After the locking operation is completed, the rotary motor and reduction mechanism 106 start to rotate to the rotation speed required by centrifugal force; then it enters the next production cycle.

[0063] The working principle of the multi-station horizontal rotary centrifugal casting grinding ball production device in this embodiment is as follows: For a general horizontal rotary centrifugal casting grinding ball device, please refer to the appendix. Figure 1The device includes a centrifugal casting ball device 1-1, an upper metal mold 1-2, a lower metal mold 1-3, locking bolts 1-4, and fixing bolts 1-5. The production process of horizontally rotating centrifugal casting grinding balls includes: mold closing, locking, pouring, solidification, cooling, mold loosening, mold opening, casting removal, and cleaning, in a sequential cycle. One cycle is time-consuming and involves many operations, with many steps requiring manual intervention, such as manual locking of the upper and lower molds and mold separation, which is time-consuming and labor-intensive. To improve the production efficiency of horizontally rotating centrifugal casting grinding balls and enhance its mechanization and automation level, this application proposes a multi-station horizontally rotating centrifugal casting grinding ball device and its matching molds based on the production process flow and process requirements. (See also...) Figures 2-3 , Figure 10 As shown: On a multi-station disc device 1 with its own rotational power, multiple sets of horizontal rotating centrifugal casting grinding ball units are set. Each set of horizontal rotating centrifugal casting grinding ball units is equipped with a grinding ball tooling mold 3 that matches it. The corresponding process of horizontal rotating centrifugal casting grinding balls can be completed at different stations. The multi-station horizontal rotary centrifugal casting grinding ball production device is based on the process flow of horizontal rotary centrifugal casting grinding balls. Multiple sets of horizontal rotary centrifugal casting grinding ball units are arranged on the multi-station disc device 1. The multi-station turntable 101 rotates, pauses, and rotates in a rhythmic manner. Molten iron is poured into the mold of the grinding ball casting unit that is paused at a certain point. During the subsequent rotation, pause, and rotation of the multi-station turntable 101, the casting grinding ball unit completes the filling, solidification, and cooling of the casting grinding ball at different subsequent positions. Then, the casting grinding ball of the unit stops at a station to separate the grinding ball from the mold. Then, the upper and lower molds are closed, and it enters the molten iron pouring station to start the next cycle. This achieves efficient, energy-saving, mechanized, and automated production of grinding balls.

[0064] The concept and method of horizontal rotary centrifugal casting of grinding balls have been proposed for a long time, but they have not been industrialized and produced. Besides the lack of breakthroughs in casting process, tooling, and mold design, the main reason is the absence of a suitable production device for industrial-scale horizontal rotary centrifugal casting of grinding balls; it remains merely a theoretical concept. This application aims to produce grinding balls with a dense internal structure, good consistency in hardness throughout, and excellent wear resistance through horizontal rotary centrifugal casting. Based on the process concept and flow of horizontal rotary centrifugal casting, the applicant has developed a multi-station horizontal rotary centrifugal casting production device for grinding balls.

[0065] The main purpose of this embodiment is to develop a multi-station horizontal rotary centrifugal casting grinding ball device and its matching tooling molds to realize the production of casting grinding balls.

[0066] The technical solution adopted in this embodiment is as follows: multiple horizontal rotating centrifugal casting device stations 2-1 and matching grinding ball tooling molds 3 are set on a large multi-station turntable 101. The molds on the horizontal rotating centrifugal casting devices at each station on the turntable are poured in sequence at a fixed station. Then, the turntable rotates according to the interval of the cycle, so that the molten iron in the molds on the horizontal rotating centrifugal casting devices at each station after pouring is solidified and cooled in sequence, and finally the grinding ball casting is obtained. The grinding ball is separated from the mold, etc. That is, the casting process of the grinding ball is completed in sequence at each station on the multi-station turntable 101, and finally a dense centrifugal casting grinding ball is produced.

[0067] Based on the above description, those skilled in the art are already able to implement it.

[0068] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their parts and components. The above description is merely illustrative of the structure of the present invention. All equivalent or simple variations made based on the structure, features, and principles described in this patent concept are included within the protection scope of this patent. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, as long as they do not deviate from the structure of the present invention or exceed the scope defined in these claims, all of which should fall within the protection scope of this invention.

Claims

1. A multi-station horizontal rotary centrifugal casting grinding ball production device, comprising a multi-station disc device (1), characterized in that: It also includes multiple sets of horizontal rotating centrifugal casting grinding ball unit devices (2) and multiple sets of grinding ball tooling molds (3). The horizontal rotating centrifugal casting grinding ball unit device (2) is equipped with multiple sets of horizontal rotating centrifugal casting device stations (2-1). Multiple sets of horizontal rotating centrifugal casting grinding ball units are set on the multi-station disc device (1). Each set of horizontal rotating centrifugal casting grinding ball units is equipped with grinding ball tooling molds (3) that are matched with it to produce grinding balls of different sizes. The multi-station disc device (1) includes a multi-station turntable (101), a multi-station turntable support (102), a base (103), a rotating shaft (104), a turntable rotating bevel gear set (105), and a rotary motor and reduction mechanism (106). The multi-station turntable (101) is used to install the horizontal rotating centrifugal casting grinding ball units. The multi-station turntable (101) can rotate clockwise or counterclockwise with the multi-station turntable support (102). The motor and reduction mechanism (106) The speed mechanism (106) is fixedly installed on the base (103). The rotating bevel gear group (105) of the turntable is connected to the rotating shaft (104) installed on the multi-station turntable support (102). As the motor and the speed reduction mechanism (106) rotate or stop, the multi-station turntable (101) is driven to rotate or stop. The multiple sets of horizontal rotating centrifugal casting grinding ball unit devices (2) all include lifting and locking hydraulic cylinder (201), worktable (202), guide sleeve (204), horizontal centrifugal rotating power mechanism (205), centrifugal rotating disk (209), centrifugal turntable rotating protrusion (210), upper beam (212) and column (213). The column (213), lifting and locking hydraulic cylinder (201) and guide sleeve (204) are all installed on the multi-station turntable (101) of the multi-station disc device (1). The piston rod head of the lifting and locking hydraulic cylinder (201) is connected to the worktable (202). A horizontal centrifugal rotation power mechanism (205), a centrifugal rotating disk (209), and a centrifugal rotating disk protrusion (210) are installed on the workbench (202). The centrifugal rotating disk (209) and the centrifugal rotating protrusion (210) are used to support the upper metal mold (31) and the lower metal mold (32), and make the upper metal mold (31) and the lower metal mold (32) rotate synchronously with the rotation of the centrifugal rotating disk (209), thereby generating centrifugal force; multiple sets of grinding ball tooling molds (3) all include an upper metal mold (31) and a lower metal mold (32), and the lower metal mold (32) The lower metal type (32) includes a lower metal type rotating groove (327) and a lower metal type tilting hinge (328). The bottom side of the lower metal type (32) is hinged to the centrifugal rotating disk (209) through the lower metal type tilting hinge (328). The tilting angle between the lower metal type (32) and the upper surface of the centrifugal rotating disk (209) is 30°-45° with the lower metal type tilting hinge (328) as the center. The centrifugal rotating disk (209) is equipped with a centrifugal rotating disk protrusion (210), and the bottom of the lower metal type (32) is equipped with a lower metal type rotating groove (327) coupled to it.When the lifting and locking hydraulic cylinder (201) is raised, the two are coupled together, and the metal mold can rotate together with the centrifugal rotating disk (209) to realize the production of horizontal rotating centrifugal casting grinding balls; the horizontal rotating centrifugal casting grinding ball unit device (2) also includes an upper metal mold parting support block (208), and an upper metal mold parting support block (208) is fixedly installed at the same height position on the side of each of the four columns (213); the upper metal mold parting support block (208) is used for the opening and parting of the upper metal and the lower metal; the horizontal rotating centrifugal casting grinding ball unit device (2) also includes a lower metal mold tilting block (206), and a lower metal mold tilting block (206) is fixedly installed at a certain height position on the side of each of the two columns (213) inside the multi-station turntable (101); the lower metal mold tilting block (206) is used for tilting the lower metal mold (32) so that the solidified grinding balls can be separated from the lower metal mold (32).

2. The multi-station horizontal rotary centrifugal casting grinding ball production device according to claim 1, characterized in that: The horizontal rotating centrifugal casting grinding ball unit device (2) also includes universal pressure rollers (214), and four universal pressure rollers (214) are mounted on the lower plane of the upper beam (212).

3. The multi-station horizontal rotary centrifugal casting grinding ball production device according to claim 1, characterized in that: There are four columns (213), and the upper ends of the four columns (213) are fixed together with the upper beam (212) to form a frame structure.

4. The multi-station horizontal rotary centrifugal casting grinding ball production device according to claim 1, characterized in that: The horizontal rotating centrifugal casting grinding ball unit device (2) also includes a worktable guide rod (203). Four worktable guide rods (203) are installed on the worktable (202). The worktable guide rods (203) can move up and down in the guide sleeve (204) on the multi-station turntable (101).

5. The multi-station horizontal rotary centrifugal casting grinding ball production device according to claim 1, characterized in that: The horizontal rotating centrifugal casting grinding ball unit device (2), grinding ball tooling mold (3) and horizontal rotating centrifugal casting device station (2-1) are all six sets; the number of stations can be set according to the production process and operating cycle.

6. The multi-station horizontal rotary centrifugal casting grinding ball production device according to claim 1, characterized in that: The multi-station disc device (1) adopts a self-powered rotating multi-station disc device.

7. A method for operating a multi-station horizontal rotary centrifugal casting grinding ball production device, employing the grinding ball production device according to any one of claims 1-6, characterized in that: Station 1 (G1) is the molten iron pouring station; Station 2 (G2) is the molten iron centrifugal filling station; Station 3 (G3) is the molten iron cooling and solidification station; Station 4 (G4) is the cooling and solidification station; Station 5 (G5) is the metal upper and lower mold opening and grinding ball removal station; Station 6 (G6) is the metal upper and lower mold air blowing cleaning, mold closing, and locking station; the rotary operation is a rhythmic rotary operation, using counterclockwise rotation; The specific steps of the horizontal rotary centrifugal casting production process of the grinding balls are as follows: The multi-station turntable (101) stops rotating and pours molten iron into the horizontal rotary centrifugal casting grinding ball unit at station one (G1), which has already closed the mold and reached the horizontal rotary centrifugal casting speed. At this station, the molten iron required for the forming metal mold is quickly poured in. Under the action of centrifugal force, the molten iron begins to gradually fill the grinding ball cavity of the metal mold. Then, the multi-station turntable (101) begins to rotate counterclockwise by one station angle to transfer the unit. After rotating to station two (G2), the molten iron in the metal mold continues to fill the grinding ball cavity of the metal mold under the action of centrifugal force. The molten iron and the metal mold are in seamless contact and the temperature continues to drop. When the temperature of the molten iron at the contact point with the grinding ball cavity drops to the solidification temperature, the molten iron at this point begins to solidify and gradually expands towards the central spherical cavity of the disc. The multi-station turntable (101) continues to rotate one station angle and then stops. This unit enters station three (G3). At this station, the molten iron has completely filled the metal mold of this unit. The grinding ball cavity is filled, and the molten iron in the grinding ball cavity is continuously cooling and solidifying. Meanwhile, the remaining molten iron in the annular casting vessel continues to replenish the liquid state of the grinding ball cavity under the action of centrifugal force. Then, the multi-station turntable (101) continues to rotate one station angle and then stops. This unit enters station four (G4). At this station, the molten iron in the grinding ball cavity continues to cool, completing the transformation from liquid to solid state and completely solidifying. The remaining molten iron in the annular casting vessel also completes the liquid replenishment of the grinding ball cavity. The grinding balls continue to cool. At this station, the horizontal rotary motor of the unit is de-energized. Under the action of inertia, the multi-station turntable (101) continues to rotate and gradually decelerates. The lifting and locking hydraulic cylinder (201) descends, driving the upper metal mold (31) and lower metal mold (32) to descend to a certain distance. At this time, the upper surface of the upper metal mold gradually separates from the four universal pressure rollers. The upper metal mold (31) and lower metal mold (32) are no longer in the locking state, but the upper metal mold (31) and lower metal mold (32) are still in the mold closing state.Then the multi-station turntable (101) continues to rotate one station angle and stops. The unit enters station five (G5). The multi-station turntable (101) gradually decelerates to the minimum speed. Finally, through the action of the sensor signal criterion, the hinge position of the lower metal mold is rotated to a position perpendicular to the radius of the multi-station turntable (101) of this station and stops. That is, the center line of the grinding ball model is completely coincident with the center line of the disk. The motor brake is activated, and the multi-station turntable (101) stops rotating and remains stationary. At this time, the grinding ball in the metal mold cavity has cooled to below 500°C. The upper metal mold (31) and lower metal mold (32) of this unit lift and lock the hydraulic cylinder (20) 1) The mold descends again, and the upper metal mold (31) and lower metal mold (32) operations begin. The locking hydraulic cylinder (201) descends, causing the upper metal mold (31) and lower metal mold (32) to descend. When the lower plane of the upper metal mold (311) touches the upper plane of the four upper metal mold parting support blocks (208) installed on the four columns, the upper metal mold (31) stops descending. The lower metal mold (32) and the grinding ball in the cavity continue to descend with the lifting locking hydraulic cylinder (201). When the lower plane of one end of the lower metal mold (32) touches the lower metal mold tilting block (206) installed on the two columns, the lower metal mold at that position... The lower metal type (32) stops descending, while the other end of the lower metal type (32), driven by the lower metal type tilting hinge (328) of the lower metal type (32), continues to descend along with the centrifugal rotating disk (209). The lower metal type rotating groove (327) on the lower plane of the lower metal type (32) and the centrifugal rotating disk rotating protrusion (210) installed on the upper plane of the centrifugal rotating disk (209) and coupled with the lower metal type rotating groove (327) on the lower plane of the lower metal type (32) gradually disengage completely. When the lifting and locking hydraulic cylinder (201) descends to the lowest position, the lower metal type (32) is in a tilted state of 30°-45°. The grinding balls can be easily separated from the cavity of the lower metal mold (32) by manual or mechanical means; then the multi-station turntable (101) continues to rotate one station angle and stops, and the unit enters station six (G6), where the upper and lower metals can be blown cleaned. After this operation is completed, the upper metal mold (31) and lower metal mold (32) can be locked. This operation is the reverse operation of the loosening operation at station five (G5), which will not be described in detail here. After the locking operation is completed, the rotary motor and reduction mechanism (106) start to rotate to the rotation speed required by centrifugal force; then it enters the next production cycle.

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