Infinite dimensional suspension pressing forming process for ceramic ball blank

Abstract

The invention relates to an infinite dimensional suspension pressing forming process for a ceramic ball blank, belongs to the technical field of ceramic grinding ball processing, and aims to provide an infinite dimensional suspension pressing forming process for the ceramic ball blank from two paths of preparation of an embedded metal grid ball core and infinite dimensional suspension pressing balling. The problem of low specific gravity of the ceramic grinding ball and the problems of inconsistent compactness, low density, low strength, eccentric gravity center, pressing line of the blank, poor roundness and the like in each dimensional direction of the interior of the blank in the existing dry pressing forming mode are solved. The process is characterized by comprising the following steps: 1, preparing a metal grid sphere core; 2, performing sintering pretreatment on the sphere core ground glaze; thirdly, developing an infinite dimensional suspension pressure ball forming mill; and 4, pressing the metal grid ground glaze ball core and the ceramic granulation powder in any one dimensional direction in an infinite dimensional direction suspended pressure ball forming mill to obtain the embedded ceramic ball blank.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ceramic grinding ball processing, in particular to a ceramic ball blank infinite dimension suspension pressure forming process. BACKGROUND

[0002] Ceramic grinding balls have been widely used in powder grinding industry. For grinding balls with a diameter greater than 30mm, the ball blank is usually pressed by dry pressing forming technology. Taking alumina ceramic grinding ball as an example, it has high hardness, small wear, and no invasion to powder, but compared with steel grinding ball, it has lower density, lower grinding kinetic energy, and lower grinding efficiency. Taking zirconia ceramic grinding ball as an example, its density is higher than that of alumina ceramic grinding ball, but still lower than that of steel grinding ball. The dry pressing forming process of the ball blank can only be pressed in one dimension and two dimensions, resulting in anisotropy of the ball blank structure and strength, and problems such as inconsistent density in each dimension, low strength, eccentricity of gravity center, existence of pressing line in the blank body, poor roundness, etc.

[0003] CN202310819423.5 discloses a high-iron-content wear-resistant ceramic grinding ball, but the high iron oxide component of the grinding ball easily introduces iron impurities during the ball milling process, resulting in low purity of the discharged material. CN201710586743.5 discloses a metal and ceramic composite grinding medium for a ball mill and a preparation method thereof, which uses a dense metal ball as the core and a multi-layer coated ceramic layer and is pressed into a blank by isostatic pressing, resulting in significant shrinkage of the metal ball core relative to the ceramic shell during the cooling stage after firing, which reduces the bonding interface strength. CN202410748905.0 discloses an alumina ceramic grinding ball with adjustable specific gravity and a preparation method thereof, which uses metal powder and alumina ceramic granulation powder mixed in proportion to form a core after heat treatment, and alumina ceramic powder is rolled and coated to form a blank. The density of the ball is not superior to that of the dry pressing blank process.

[0004] There is no relevant patent or literature reported on the pressing forming of ball blank in infinite dimensions.

[0005] How to integrate the specific gravity advantage of steel grinding ball and the hardness and non-invasion advantage of ceramic grinding ball into one, and to implement infinite dimension pressing of the ball blank, has become a technical problem to be solved by the present application. SUMMARY

[0006] The present application aims to realize a high specific gravity ceramic ball for grinding, and provides a ceramic ball blank infinite dimension suspension pressure forming process from two paths of preparing the metal mesh grid ball core and the blank infinite dimension suspension pressure forming, which comprises the following steps: preparing a metal mesh grid ball core casting lost foam, metal mesh grid ball core melting and casting forming, metal mesh grid ball core bottom glaze pre-sintering, ceramic granulation powder selection, and metal mesh grid bottom glaze pre-sintering ball core and ceramic granulation powder in the infinite dimension suspension pressure ball forming machine to form a ceramic ball blank by suspension pressure, which can at least solve the following technical problems: the low balling grinding efficiency caused by the small density of the existing ceramic ball, the one-dimensional and two-dimensional direction pressure of the blank forming, the anisotropy of the blank structure and strength, the inconsistency of the balling dimension density, the low density and strength, the eccentricity of the gravity center, the pressure line of the blank body, the poor roundness and other problems.

[0007] The purpose of the present application is mainly realized by the following technical solutions:

[0008] On the one hand, the present application provides a preparation method of a high specific surface metal ball core, which comprises the following steps:

[0009] Step 1, 3D printing preparation of a high specific surface metal mesh grid ball core casting lost foam

[0010] Further, the lost foam is a single-layer or multi-layer regular polyhedral grid spherical configuration with the ball center as the gravity center;

[0011] Further, 6, 20 and 12 radial mold strips are diverged from the uniform density of the ball center to construct regular 8-polyhedron, regular 12-polyhedron and regular 20-polyhedron grid configurations, respectively;

[0012] Further, the lengths of the mold strips are equal;

[0013] Further, different levels of grid nodes are arranged on the mold strips with equal lengths;

[0014] Further, the regular polyhedral grid spherical configuration is constructed with the same layer grid nodes as the vertices;

[0015] Further, when the mold strips are provided with multiple layers of grid nodes, a multi-layer regular polyhedral grid spherical configuration supported by the mold strips and nested with each other with the ball center as the gravity center is constructed accordingly;

[0016] Further, the mold strips diverged from the ball center are all squares with equal cross-sectional areas, and the same layer regular polyhedral grid strips are all squares with equal cross-sectional areas;

[0017] Further, according to the size of the ball diameter, a regular polyhedral grid ball with a larger sum of the number of mold strips and the number of strips is selected for large balls to realize a larger specific gravity of the large balls.

[0018] Step 2, metal mesh grid ball core melting and casting forming

[0019] Further, the cast metal is a magnetic metal;

[0020] Further, the cast metal is a high melting point and high specific gravity metal;

[0021] Preferably, the cast metal is ferrite stainless steel material;

[0022] Preferably, the cast metal is 400 series stainless steel material.

[0023] In one aspect, the application provides a metal mesh ball core glaze pretreatment method, the treatment method comprising:

[0024] Step one, selection of the glaze

[0025] Further, the glaze selected is a stainless steel substrate glaze;

[0026] Preferably, an alkali-boron-silicate glaze is selected;

[0027] Preferably, an alkali-vanadium-silicate glaze is selected;

[0028] Preferably, the ball core is coated using a dipping method.

[0029] Step two, pre-sintering treatment of the enameled ball core

[0030] Further, the enameled ball core is pre-sintered at a temperature of 600-650°C for 30-60 minutes.

[0031] In one aspect, the application provides a selection method for ceramic granulation powder

[0032] Preferably, high-quality ceramic granulation powder on the market is directly used for unlimited dimension suspension pressure forming of the ball blank;

[0033] Preferably, aluminum oxide ceramic granulation powder is prepared by selecting aluminum oxide powder, MnO2-TiO2-MgO system composite solubility aid, and ash-free water-based binder;

[0034] Preferably, zirconium oxide ceramic granulation powder is prepared by selecting yttrium oxide at a mole ratio of 3-4%.

[0035] In one aspect, the application provides an unlimited dimension suspension pressure ball forming machine

[0036] Further, the dry pressing ball forming machine is composed of a working platform, a mechanical pressure device, a dry pressing ball forming device, and a machine-side ball core sleeve;

[0037] Further, the mechanical pressure device is provided with one part of a mechanical press on each side, the pressure head and the pressure rod are fastened in a screw connection manner, and the two pressure heads are combined to form a ball blank mold cavity. The mechanical press adjusts the linear reciprocating speed of the pressure rod and the pressure head through a frequency conversion and speed reduction device;

[0038] Further, the dry pressure balling device is provided with a center pressure head die cavity cylinder, sleeve bearings are arranged at both ends of the pressure head die cavity cylinder, the inner ring of the bearing is fastened to the outer wall of the pressure head die cavity cylinder, the outer ring of the bearing is welded to the inner side end of the sleeve end head, and the outer wall of the bearing outer ring is fastened to the outer wall sleeve plastic rotating handle;

[0039] Further, a granulated ceramic powder receiving port is arranged on each side of the sleeve bearing.

[0040] Further, a symmetrical square platform outside the sleeve is arranged in the middle of the sleeve, a magnet pair bearing is arranged on the platform, the outer ring of the magnet pair bearing is fastened to the sleeve, the inner ring of the bearing is fastened to the magnet, an iron yoke is arranged on the outer side of the magnet, the outer ring of the iron yoke is fastened to the magnet pair plastic rotating handle, the magnet pair is an electromagnet, and the magnetic field strength of the magnet pair is the same.

[0041] Further, the machine-side ball core sleeve is a two-section cylinder sleeve connected by a straight thread or a buckle, an inner and outer thread or a buckle is arranged at the connecting end, a hemispherical ball core die cavity is arranged at the port, after the pre-sintering bottom glaze metal grid ball core is docked and accommodated, the center pressure rod pressure head die cavity cylinder is inserted, the cylinder sleeve is loosened in the opposite direction to be extracted, and the bottom glaze metal grid ball core is suspended in the center of the pressure rod pressure head die cavity cylinder under the action of the magnetic field force.

[0042] Further, a mechanical pressure device working instruction switch and an electromagnetic magnet pair power conversion switch are arranged on the working platform.

[0043] Further, parallel sliding guide rails are arranged on the platform of the dry pressure balling device, which are used to ensure the guiding accuracy of the balling device when the balling device is pulled out and pushed into the middle of the mechanical pressure machine.

[0044] Further, the balling device is pushed to the inner end head of the sliding guide rail, and the two ports of the pressure head die cavity cylinder are seamlessly docked with the pressure head outlet port of the mechanical pressure machine.

[0045] Further, the bearings are all non-magnetic material bearings, and the sleeve bearing, the magnet pair bearing, the pressure rod, the pressure head, the pressure head die cavity cylinder, the outer wall sleeve, the machine-side ball core left sleeve and the right sleeve are all non-magnetic material metals.

[0046] On the one hand, the present application provides an infinite-dimensional suspension pressure ceramic ball blank

[0047] Further, the balling device is pushed to the inner end head of the sliding guide rail, and the two ports of the pressure head die cavity cylinder are seamlessly docked with the pressure head outlet port of the mechanical pressure machine.

[0048] Further, the mechanical press is started, the pressure rod pressure head enters the pressure head mold cavity cylinder to make linear reciprocating motion, first, the two pressure heads are closed to reach the maximum stroke, the metal grid ball core and the ceramic granulation powder complete one-dimensional direction dry pressing, then the pressure rod retracts, the ceramic ball blank is suspended in the center of the pressure rod pressure head mold cavity cylinder;

[0049] Further, while the pressure rod retracts, the rotating magnet pair and the ball blank are suspended in the rotating direction of the magnet pair, the rotating outer wall sleeve and the ball blank are suspended in the rotating direction of the sleeve, the rotating different magnet pairs and the combined rotating outer wall sleeve and magnet pair and ball blank change the rotating axial rotation to rotate the magnet pair and the ball blank in an infinite dimension direction at an arbitrary angle, the pressure rod advances again, and the pressure rod pressure head implements the infinite dimension direction suspension pressure on the ball blank again.

[0050] An infinite dimension direction suspension pressure forming ceramic ball blank and an infinite dimension direction suspension pressure ball forming machine are obtained by comprehensively using the above preparation method.

[0051] Compared with the prior art, the present application can achieve the following beneficial effects:

[0052] The ceramic ball blank infinite dimension direction suspension pressure forming process of the present application uses 3D printing to prepare a high specific surface grid ball core for foundry lost foam, selects high-density and high-melting-point magnetic stainless steel for melting and casting to obtain the grid ball core, the metal grid ball core is embedded in the ball blank, the density of the ball blank is improved, and by designing metal ball cores with different grid densities, ceramic balls with corresponding specific gravity requirements can be obtained.

[0053] The ceramic ball blank infinite dimension direction suspension pressure forming process of the present application uses ball core coating and pre-sintering boron-based or vanadium-based bottom glaze as the connecting layer of the metal grid and the ceramic granulation powder, during the temperature rising and sintering process, the bottom glaze is first melted to form a liquid phase zone, the ceramic powder crystal structure approaches the liquid phase zone, helping the ceramic powder particles to automatically fill the voids in the embryo and the pores left after the evaporation of gas, impurities and moisture, so as to improve the density of the ceramic ball, and because its expansion coefficient is lower than that of stainless steel metal and alumina ceramic, the difference in expansion coefficient between stainless steel metal and alumina ceramic is eliminated, and the bonding surface strength is reduced.

[0054] The ceramic ball blank infinite dimension direction suspension pressure forming process of the present application uses the metal grid ball core and the ceramic granulation powder grid to be nested in combination, so that the strength of the ceramic ball is improved.

[0055] The ceramic ball blank infinite dimension suspension pressure forming process of the application implements infinite dimension suspension pressure in the balling machine mold cavity by pre-sintering the metal mesh grid ball core and ceramic granulation powder, breaks through the limitation that the existing pressure machine ball blank forming can only be one-dimensional and two-dimensional pressure, eliminates the problems of anisotropy of blank structure and strength, inconsistency of each dimension density in the blank, low density, low strength, eccentricity of gravity center, existence of pressure line in the blank, poor roundness, etc., and has good balling roundness, non-eccentricity of gravity center, consistent density of each dimension, high density, high strength and high quality. BRIEF DESCRIPTION OF DRAWINGS

[0056] The drawings are only used for specific embodiment illustration and are not used for limiting the scope of the application.

[0057] Figure 1 Structure schematic diagram of the infinite dimension suspension balling machine of the application

[0058] Figure 2 Structure schematic diagram of the ball core sleeve of the application

[0059] Figure 3 Structure schematic diagram of the example regular dodecahedron single-layer magnetic metal mesh grid ball core of the application

[0060] Reference signs: 1-1, pressure machine platform, 1-2, mechanical pressure machine, 1-3, pressure rod, 1-4, pressure head, 1-5, pressure head mold cavity cylinder, 1-6, sleeve bearing, 1-7, outer wall sleeve, 1-8, outer wall sleeve plastic rotation hand wheel, 1-9, magnet pair bearing, 1-10, magnet pair, 1-11, iron yoke, 1-12, upper and lower magnet pair plastic rotation hand wheel, 1-13, front and rear magnet pair plastic rotation hand wheel, 1-14, ceramic powder receiving port, 2-1, left sleeve, 2-2, right sleeve, 2-3, pressure head left mold cavity, 2-4, pressure head right mold cavity, 2-5, sleeve buckle (or straight thread), 2-6, sleeve check dam, 2-7, ball blank ejector, 3-1, ball core, 3-2, mold strip, 3-3, edge strip. DETAILED DESCRIPTION

[0061] The preferred embodiments of the application are specifically described below in combination with the drawings, wherein the drawings form a part of the application and are used together with the embodiments of the application to explain the principles of the application, but are not used to limit the scope of the application.

[0062] The application aims to realize a high specific gravity ceramic ball for grinding, from two paths of preparation of an embedded metal mesh grid ball core and infinite dimension suspension pressure balling, and provides a ceramic ball blank infinite dimension suspension pressure forming process, which comprises the following steps.

[0063] Step 1, preparation of a metal mesh grid ball core casting lost foam;

[0064] Step 2, metal mesh grid ball core melting and casting forming;

[0065] Step 3, metal grid ball core bottom glaze pre-sintering;

[0066] Step 4, select ceramic granulation powder;

[0067] Step 5, metal grid bottom glaze pre-sintering ball core and ceramic granulation powder in infinite dimension suspension pressure ball machine suspension pressure into ceramic ball blank.

[0068] Specifically, in the above step 1, 3D modeling printing technology is selected to model and print a grid ball lost foam. The grid ball lost foam has a complex structure and high precision requirements. The 3D modeling printing has high precision and is guaranteed.

[0069] Specifically, in the above step 1, a regular polyhedral grid ball lost foam is modeled and printed. The regular polyhedral grid center is located at the center of the grid, and the lost foam center is located at the center of the ball, thereby ensuring that the ball center is not eccentric.

[0070] Specifically, in the above step 1, a regular polyhedral grid ball lost foam is modeled and printed. The regular polyhedral grid ball lost foam is a single-layer or multi-layer nested regular polyhedral structure with uniform density distribution. The grid ball lost foam ensures uniform internal stress and is not prone to cracking or deformation during sintering and cooling.

[0071] Specifically, in the above step 1, a single-layer or multi-layer regular polyhedral grid ball lost foam is modeled and printed. The grid ball lost foam is a square with equal cross-sectional area, and the same layer of regular polyhedral grid strips is also a square with equal cross-sectional area. The maximum surface area of the longitudinal section is the same in any two-dimensional linear expansion and contraction force, and the internal stress is uniform, which is not prone to cracking or deformation.

[0072] Specifically, in the above step 1, a single-layer or multi-layer regular polyhedral grid ball lost foam is modeled and printed according to the ball size and quality requirements. The multi-layer regular polyhedral grid ball lost foam can maximize the weight of the embedded metal grid ball core, thereby increasing the specific gravity of the ball.

[0073] Specifically, in the above step 1, the weight ratio of ceramic powder and embedded metal is determined according to the requirements of ball diameter, shell thickness, and specific gravity, and then one of the following is selected to model and print the grid ball lost foam: a regular octahedron with 8 strips and 12 edges, a regular icosahedron with 12 strips and 30 edges, and a regular dodecahedron with 20 strips and 30 edges, to achieve the specific gravity requirements of the ball.

[0074] Specifically, in the above step 2, ferrite 400 series stainless steel is selected as the grid ball core casting metal. The 400 series stainless steel has magnetic properties, and the grid ball core can be driven by the magnetic force of the magnetic pair of the infinite dimension suspension pressure ball machine, making it move in infinite dimensions and achieve infinite dimension suspension.

[0075] Specifically, in the above step 2, the 400 series stainless steel has high density and high melting point, and the 410 stainless steel has a density of 7.7 g / cm and a melting point range of 1480-1530℃. When the composite fluxing agent and the ceramic granulation powder are sintered into a ball below 1300℃, the 410 stainless steel remains solid and does not deform.

[0076] Specifically, in the above step 3, the base glaze of the alkali-boron-silicate or alkali-vanadium-silicate series is selected for the metal mesh ball core, and the base glaze containing B2O3 has good fluxing effect, can reduce the softening temperature, viscosity, surface tension and expansion coefficient of the porcelain enamel, and the base glaze containing V2O5 can significantly improve the adhesion with the stainless steel substrate;

[0077] Specifically, in the above step 3, the ball core with the base glaze is pre-sintered at a temperature of 600-650℃ for 30-60 minutes, the base glaze and the stainless steel substrate establish initial adhesion, and the stainless steel substrate base glaze liquidizes and flows at a firing temperature of 820-870℃. Further, during the sintering of the ceramic ball blank, the pre-sintered base glaze and the composite fluxing agent in the ceramic granulation powder together promote the formation of a glass phase at the interface between the base glaze and the ceramic granulation powder mesh blank body at low temperature, which can significantly improve the adhesion with the alumina and zirconia mesh blank body. Further, during the temperature rising and sintering process, the base glaze first melts to form a liquid phase zone, and the ceramic powder crystal structure approaches the liquid phase zone, helping the ceramic powder particles to automatically fill the voids in the blank, as well as the pores left after the evaporation of gas, impurities and moisture, so as to improve the density of the ceramic ball. Further, the expansion coefficients of boron-based and vanadium-based base glazes are lower than those of alumina ceramic, zirconia ceramic and 400 series stainless steel. The stainless steel substrate base glaze can weaken the adverse effects of ceramic powder shrinkage during high temperature sintering and molten metal shrinkage during cooling on the adhesion of the interface.

[0078] It should be noted that in the above step 4, high-quality ceramic granulation powder is directly used for pressing into a ball to fully realize the beneficial effects of high-quality ceramic granulation powder on the infinite-dimensional suspension pressure balling machine compared to other pressure machines.

[0079] Specifically, in the above step 5, the infinite-dimensional suspension pressure balling machine is composed of a working platform, a mechanical pressure device, a dry pressure balling device and a ball core sleeve beside the machine;

[0080] Specifically, in the above step 5, the mechanical pressure device is composed of a mechanical press 1-2, a pressure rod 1-3 and a pressure head 1-4. The mechanical press 1-2 controls the speed of the linear reciprocating motion of the pressure rod 1-3 and the pressure head 1-4 through frequency conversion and speed reduction device, and coordinates with the operation speed of the balling device;

[0081] Specifically, in the above step 5, the dry pressing ball device is composed of a pressing head mold cavity cylinder 1-5, a sleeve bearing 1-6, an outer wall sleeve 1-7, an outer wall sleeve plastic rotating hand wheel 1-8, a magnet pair bearing 1-9, a magnet pair 1-10, an iron yoke 1-11, a magnet pair plastic rotating hand wheel 1-12, and a ceramic powder receiving port 1-13.

[0082] Specifically, in the above step 5, the sleeve bearing 1-6 is sequentially installed at both ends of the pressing head mold cavity cylinder 1-5, the inner ring of the sleeve bearing 1-6 is fastened to the outer wall of the pressing head mold cavity cylinder 1-5, the end of the outer wall sleeve 1-7 is welded to the inner side of the outer ring of the sleeve bearing 1-6, the outer ring of the sleeve bearing 1-6 is fastened to the outer wall sleeve plastic rotating hand wheel 1-8, a granulated ceramic powder receiving port is arranged on each side of the sleeve bearing 1-6, a symmetric square platform is welded to the middle of the sleeve, the platform is provided with symmetric magnet pair bearings 1-9 (the outer ring of the iron yoke is fastened to the plastic rotating hand wheel, which is the upper and lower magnet pair), the outer ring of the magnet pair bearing is welded to the square platform, the same specification magnet pair 1-10 is fastened to the inner ring of the bearing 1-9, the magnet is surrounded by the iron yoke 1-11, and the outer ring of the iron yoke 1-11 is fastened to the magnet pair plastic rotating hand wheel 1-12, thereby completing the assembly of the dry pressing ball device.

[0083] Specifically, in the above step 5, the machine-side ball core sleeve is composed of a left sleeve 2-1 and a right sleeve 2-2, the left end of the left sleeve 2-1 is provided with a ball blank top head 2-7, the right end is provided with a pressing head left mold cavity 2-3, the left end of the right sleeve 2-2 is provided with a pressing head right mold cavity 2-4, the left sleeve 2-1 and the right sleeve 2-2 are connected by a sleeve buckle (or straight thread) 2-5, and the right sleeve 2-2 is provided with a sleeve check dam 2-6.

[0084] Specifically, in the above step 5, the machine-side ball core sleeve is composed of a left sleeve 2-1 and a right sleeve 2-2, the left end of the left sleeve 2-1 is provided with a ball blank top head 2-7, the right end is provided with a pressing head left mold cavity 2-3, the left end of the right sleeve 2-2 is provided with a pressing head right mold cavity 2-4, the left sleeve 2-1 and the right sleeve 2-2 are connected by a sleeve buckle (or straight thread) 2-5, and the right sleeve 2-2 is provided with a sleeve check dam 2-6.

[0085] It should be noted that the specification model of the infinite-dimensional suspension pressing ball machine corresponds to the diameter of the pressed ball blank, for example, the φ30 type infinite-dimensional suspension pressing ball machine only corresponds to the pressing of φ30 ball blank.

[0086] Specifically, in the above step 5, the ceramic ball blank is suspended and pressed according to the following steps.

[0087] The ball forming device is pulled out from the mechanical pressure machine 1-2, the upper and lower magnet pairs of the magnet pair 1-10 are adjusted, the upper and lower magnet pairs are in the vertical line, the material receiving port 1-13 is upward, the initial state of the suspension pressure ball machine is determined, the power supply is started to the upper and lower magnet pairs, the left sleeve 2-1 and the right sleeve 2-2 are taken, the ball core is placed between the left die cavity 2-3 and the right die cavity 2-4 of the pressure head, the buckle or knob is integrated, the left end of the ball core sleeve is inserted into the right end of the pressure head die cavity cylinder first, the sleeve block weir 2-6 is blocked and stopped, the buckle or knob 2-5 is rotated, the left sleeve 2-1 and the right sleeve 2-2 are disassembled, and are respectively pulled out from both ends of the pressure head die cavity cylinder 1-5, the pre-fired bottom glaze ball core is suspended in the center of the pressure head die cavity cylinder 1-5, the ball forming device is pushed to the inner end of the sliding guide rail, the ball forming device is placed in the middle of the mechanical pressure machine 1-2, the two ends of the pressure head die cavity cylinder 1-5 of the ball forming device are seamlessly connected with the outlet port of the mechanical pressure machine, the three-axis six-directional orientation of the ball core is determined, the axial direction of the pressure head die cavity cylinder 1-5 is the horizontal axis and the left-right direction, the axial direction of the front and rear magnet pairs of the magnet pair 1-9 is the vertical axis and the front and rear direction, and the axial direction of the front and rear magnet pairs of the magnet pair 1-9 is the vertical axis and the front and rear direction;

[0088] Specifically, in step 5.1, a fixed volume of ceramic granulation powder is taken from a quantitative container, and an equal amount is injected from two ceramic powder material receiving ports 1-14 respectively. It should be noted that the volume of the ceramic granulation powder container is determined by the weight ratio of the ceramic powder and the embedded metal in step 1 and the bulk density of the ceramic granulation powder.

[0089] Specifically, step 5.2, start mechanical press 1-2, start power supply to the upper and lower magnet pairs in the initial state, implement the first pair of pressure, before the pressure, rotate the outer wall sleeve plastic rotating handle 1-8, the magnet pairs drive the ball core to rotate, the rotating ball core stirs the ceramic granulation powder to fill into the ball core through the ball core grid gap, at this time, rotate the upper and lower magnet pairs plastic rotating handle 1-12 in the forward or reverse 360°, the ball blank is suspended to the initial state with the vertical axis as the rotating axis, realizes the four-way pressure of the ball blank front and back, left and right; Further, switch the power supply to the front and back magnet pairs, rotate the front and back magnet pairs plastic rotating handle 1-13 in the forward or reverse 360°, the ball blank is suspended to the initial state with the vertical axis as the rotating axis, the pressure head 1-4 advances, realizes the four-way pressure of the ball blank up and down, left and right; Further, switch the power supply to the upper and lower magnet pairs, rotate the upper and lower magnet pairs plastic rotating handle 1-12 in the forward 90°, then switch the power supply to the front and back magnet pairs, rotate the front and back magnet pairs plastic rotating handle 1-13 in the forward or reverse 360°, the ball blank is suspended with the horizontal axis as the rotating axis, the pressure head 1-4 advances, realizes the four-way pressure of the ball blank up and down, front and back; Further, rotate the front and back magnet pairs plastic rotating handle 1-13 in the reverse 90° to make the ball blank return to the initial three-dimensional rectangular coordinate and spherical coordinate state, rotate the front and back magnet pairs plastic rotating handle 1-13 in the forward 45°, then switch the power supply to the upper and lower magnet pairs, rotate the upper and lower magnet pairs plastic rotating handle 1-12 in the forward or reverse 360°, the pressure head 1-4 advances straight to the initial spherical coordinate (15mm, 90°, 270°), (15mm, 45°, 45°), (15mm, 135°, 225°) sphere surface; Further, switch the power supply to the front and back magnet pairs, rotate the front and back magnet pairs plastic rotating handle 1-13 in the forward 90°, then switch the power supply to the upper and lower magnet pairs, rotate the upper and lower magnet pairs plastic rotating handle 1-12 in the forward or reverse 360°, the pressure head 1-4 advances straight to the initial spherical coordinate (15mm, 90°, 270°), (15mm, 45°, 135°), (15mm, 135°, 315°) sphere surface;

[0090] Specifically, step 5.2 is completed, the ball blank is sequentially suspended and pressed in the infinite-dimensional suspension pressure forming machine left and right sphere surface, up and down sphere surface, front and back sphere surface, and cross-face sphere surface;

[0091] Specifically, step 5.3 can further follow the order of step 5.2 to rotate the corresponding magnet pairs at any rotation angle for infinite-dimensional pressure, then turn off the mechanical press 1-2, and retract the pressure rod 1-3 and the pressure head 1-4 to the initial state;

[0092] Specifically, in step 5.4, the left sleeve 2-1 and the right sleeve 2-2 are taken, the second ball core is arranged between the left die cavity 2-3 and the right die cavity 2-4 of the pressure head, the buckle or knob is integrated, the ball forming device is pulled out from the middle of the mechanical press 1-2, the left end of the ball core sleeve is inserted into the right end of the die cavity cylinder 1-5 of the pressure head first, and the sleeve block 2-6 is blocked and stopped, meanwhile, the ball blank top head 2-7 receives the ball blank pressed and is pressed out from the left end of the die cavity cylinder 1-5 of the pressure head, the buckle or knob 2-5 is rotated, the left sleeve 2-1 and the right sleeve 2-2 are disintegrated, and are pulled out from the two ends of the die cavity cylinder 1-5 respectively, then the ball forming device is pushed into the middle of the mechanical press 1-2, the outlet port of the mechanical press pressure head is seamlessly connected with the two ports of the die cavity cylinder of the ball forming device, and the second ball core is suspended in the center of the die cavity cylinder 1-5 for pressing.

[0093] Compared with the prior art, the ceramic ball blank infinite dimension suspension pressure forming process adopts 3D modeling to print a regular polyhedral stainless steel grid ball core and ceramic granulation powder to press a high-density ball blank nested with each other, so that the problem of low ball forming specific gravity is solved.

[0094] Compared with the prior art, the ceramic ball blank infinite dimension suspension pressure forming process adopts 400 series stainless steel material with high melting point and low expansion coefficient, and the metal grid ball core is coated with base glaze of alkali-boron-silicate or alkali-vanadium-silicate system, so that the nesting adhesion of the metal grid, the base glaze and the fired ceramic is significantly improved.

[0095] Compared with the prior art, the ceramic ball blank infinite dimension suspension pressure forming process adopts the pre-sintered base glaze metal grid ball core and the ceramic granulation powder to implement infinite dimension suspension pressure in the ball forming machine die cavity, breaks through the limitation that the existing press ball blank forming can only be pressed in one dimension and two dimensions, eliminates the anisotropy problem of the blank structure and strength, and has good ball forming roundness, no eccentricity of the center of gravity, consistent density in each dimension, high density and high strength.

[0096] The preparation method process of the application is simple, operable and suitable.

[0097] Embodiment 1

[0098] The embodiment provides a ceramic ball blank infinite dimension suspension pressure forming method for producing high-density ball.

[0099] The ball forming specifications and quality indexes are determined as follows: φ30mm, ball forming specific gravity 6.0g / cm3, ceramic density 3.65±0.05g / cm3, grid ball core casting material density 7.7g / cm3, and ceramic material surface layer thickness of the coated ball core 1mm.

[0100] Determination of the spheroidization parameters: spheroidization volume 14.10±0.05 cm3, spheroidization weight 85.00±0.20 g, wherein the ceramic material volume is 5.90±0.05 cm3, the lattice sphere core volume is 8.20±0.05 cm3, the sphere core weight is 63.50±0.05 g, and the ceramic material weight is 21.65±0.05 g;

[0101] Determination of raw materials: 95 alumina ceramic granulation powder with bulk density of 1.35-1.45 g / cm3(containing calcium-magnesium-silicon-based solubility improver), loss on ignition of 16%-18%, 410 stainless steel ball casting material, and alkali-vanadium-silicate-based stainless steel substrate underglaze powder, with 20.00±0.05 cm3 of granulation powder required for a single sphere;

[0102] Determination of process conditions: green body pressing force 800 kg / cm2, sintering temperature 1300-1350℃;

[0103] Determination of the sphere blank diameter: φ30.6±0.1 mm;

[0104] Determination of the granulation powder holding container volume: 10.00±0.05 cm3;

[0105] Determination of the press head mold cavity radius: the press head mold cavity radius is 15.20±0.02 mm;

[0106] Determination of the lattice sphere core lost mold specifications: a single layer of regular octahedron with 8 mold strips, 12 prism strips, mold strip length ≤14 mm, and lattice volume of 8.20±0.05 cm3 is selected to construct the lattice sphere core lost mold.

[0107] The preparation method comprises:

[0108] Step 1: 3D modeling and printing of the lattice sphere core lost mold using a single layer of regular octahedron with 8 mold strips, 12 prism strips, mold strip length ≤14 mm, and lattice volume of 8.20±0.05 cm3.

[0109] Step 2: sequentially performing lost mold assembly, 410 stainless steel melting, lost mold pouring, and lattice sphere core shell breaking and impurity removal to surface cleaning.

[0110] Step 3: selecting finished alkali-vanadium-silicate-based stainless steel substrate underglaze powder and finished JN-25 silica sol, and mixing the underglaze powder and silica sol at a volume ratio of 0.5-0.6:1 to form an underglaze immersion coating material.

[0111] Step 4: lattice sphere core immersion coating of underglaze, natural air drying, and pre-sintering at a temperature of 600-650℃ for 30-60 minutes.

[0112] Step 5, pull the balling device out from between the mechanical press ram exit ports, turn the power on to the upper and lower magnet pair, place the pre-fired ground glaze ball core into the ball core sleeve, insert the sleeve into the ram die cylinder, turn the sleeve clasp or knob, pull the sleeve out, the ball core is suspended in the center of the ram die cylinder.

[0113] Step 6, advance the balling device into the slide rail end, confirm that the balling device ram die cylinder ports are seamlessly interfaced with the mechanical press ram exit ports, measure 10.00 ± 0.05 cm3 of the alumina ceramic granulation powder into a measuring container, and inject the powder from the two ceramic powder receiving ports.

[0114] Step 7, turn the power on to the mechanical press, advance the two-sided ram press heads into the die cylinder to advance the alumina ceramic granulation powder towards the grid ball core, rotate the outer wall sleeve plastic rotation handle before pressing, the magnet pair rotates the ball core, the rotating ball core stirs the alumina ceramic granulation powder to fill the grid gap of the ball core and enter the interior of the ball core, implement the first pressing, and when the maximum stroke is reached, the pressing force approaches 800 kg / cm2, and the automatic retraction is completed. The first left and right spherical surface pressing is completed.

[0115] Step 8, further, while the ram is retracting, rotate the upper and lower magnet pair plastic rotation handle 90° in the forward direction, the ball blank is suspended 90° in the vertical direction by the upper and lower magnet pair, the ram press head advances again, and the ram press head implements pressing on the front and back spherical surfaces relative to the initial state. The pressure line formed by the first pressing on the spherical surface is eliminated.

[0116] Step 9, further, switch the power to the front and back magnet pair, rotate the front and back magnet pair plastic rotation handle 90° in the forward direction, the ball blank is suspended 90° in the vertical direction by the front and back magnet pair, the ram press head advances, and the upper and lower spherical surface pressing relative to the initial state is completed.

[0117] Step 10, further, rotate the front and back magnet pair plastic rotation handle 90° in the forward direction, the ball blank is suspended 90° in the vertical direction by the front and back magnet pair, the ram press head advances, and the left and right spherical surface pressing relative to the initial state is completed.

[0118] Step 11, further, switch the power to the upper and lower magnet pair, rotate the upper and lower magnet pair plastic rotation handle 90° in the forward direction, and then switch the power to the front and back magnet pair, rotate the front and back magnet pair plastic rotation handle 90° in the forward direction, the ram press head advances, and the upper and lower spherical surface pressing relative to the initial state is completed.

[0119] Step 12, rotate the front and back magnet pair plastic rotation handle 90° in the forward direction, the ram press head advances, and the front and back spherical surface pressing relative to the initial state is completed.

[0120] Step 13, further, reverse 90° rotation of the front and rear magnet pairs of the plastic rotating handle, so that the ball blank returns to the initial three-dimensional right-angle coordinate and spherical coordinate state, forward 45° rotation of the front and rear magnet pairs of the plastic rotating handle, the pressure rod pressure head advances, completing the initial spherical coordinates (15mm, 90°, 270°), (15mm, 45°, 45°), (15mm, 135°, 225°) of the opposite-angle spherical surface pressure.

[0121] Step 14, further, forward 90° rotation of the front and rear magnet pairs of the plastic rotating handle, the pressure rod pressure head advances, completing the initial spherical coordinates (15mm, 90°, 270°), (15mm, 45°, 135°), (15mm, 135°, 315°) of the opposite-angle spherical surface pressure.

[0122] Step 15, turn off the mechanical press, and retract the pressure rod and pressure head to the initial state.

[0123] Step 16, take the left and right sleeves and place the second ball core between the left and right mold cavities of the pressure head, and buckle or rotate the knob to become an integral whole. The left end of the ball core sleeve is inserted into the right end of the pressure head mold cavity cylinder first, and is stopped by the sleeve block. At the same time, the ball blank top head receives the ball blank that has been pressed out from the left end of the pressure head mold cavity cylinder, and the left and right sleeves are disassembled by rotating the buckle or knob, and are respectively pulled out from the two ends of the pressure head mold cavity cylinder. The second ball core is suspended in the center of the pressure head mold cavity cylinder for pressing.

[0124] In this embodiment, a high-density ball blank is obtained, which is φ30.6±0.1mm, and the embedded regular octahedral stainless steel grid ball core and the alumina ceramic granulation powder are nested with each other.

[0125] Embodiment 2

[0126] This embodiment provides an infinite-dimensional suspension pressure forming method for producing high-density spherical balls.

[0127] Determine the specifications and quality indicators of the spherical balls: φ30mm, spherical ball specific gravity 6.0g / cm3, ceramic density 3.65±0.05g / cm3, grid ball core casting material density 7.7g / cm3, and ceramic material surface layer thickness of the coated spherical ball core 1mm;

[0128] Determine the spherical ball composition parameters: spherical ball volume 14.10±0.05cm3, spherical ball weight 85.00±0.20g, ceramic material volume 5.90±0.05cm3, grid ball core volume 8.20±0.05cm3, ball core weight 63.50±0.05g, and ceramic material weight 21.65±0.05g;

[0129] Determination of raw materials: 95 alumina ceramic granulation powder with bulk density of 1.35-1.45 g / cm3 (containing calcium-magnesium-silicon-based solubility improver), loss on ignition of 16%-18%, 410 stainless steel ball cast material, alkali-vanadium-silicate-based stainless steel substrate base glaze powder, and single ball required granulation powder of 20.00±0.05 cm3;

[0130] Determination of process conditions: green body pressing force of 800 kg / cm2, and sintering temperature of 1300-1350℃;

[0131] Determination of ball blank diameter: φ30.6±0.1 mm;

[0132] Determination of granulation powder holding container volume: 10.00±0.05 cm3;

[0133] Determination of press head mold cavity radius: the press head mold cavity radius is 15.20±0.02 mm;

[0134] Determination of lattice ball core lost mold specifications: a single layer of regular octahedron with 8 mold strips, 12 ribs, mold strip length ≤14 mm, and lattice volume of 8.20±0.05 cm3 is selected to construct the lattice ball core lost mold.

[0135] The preparation method comprises:

[0136] Step 1: 3D modeling and printing of the lattice ball core lost mold are performed using a single layer of regular octahedron with 8 mold strips, 12 ribs, mold strip length ≤14 mm, and lattice volume of 8.20±0.05 cm3.

[0137] Step 2: sequentially performing lost mold assembly, 410 stainless steel melting, lost mold pouring, and lattice ball core shell breaking and impurity removal to surface cleaning.

[0138] Step 3: selecting finished alkali-vanadium-silicate-based stainless steel substrate base glaze powder and finished JN-30 silica sol, and mixing the base glaze powder and the silica sol at a volume ratio of 0.4-0.5:1 to form a base glaze dipping coating.

[0139] Step 4: lattice ball core dipping of the base glaze, natural air drying, and pre-sintering at a temperature of 600-650℃ for 30-60 minutes.

[0140] Step 5: pulling the ball forming device out from between the press head outlet ports of the mechanical press, starting the power supply to the upper and lower magnets, placing the pre-sintered base glaze ball core in the ball core sleeve, inserting into the press head mold cavity cylinder, rotating the sleeve buckle or knob, pulling out the sleeve, and suspending the ball core in the center of the press head mold cavity cylinder.

[0141] Step 6: advancing the ball forming device to the inner end of the sliding guide rail, confirming that the press head mold cavity cylinder ports of the ball forming device are seamlessly connected to the press head outlet ports of the mechanical press, and using a 10.00±0.05 cm3 quantitative container to take one portion of alumina ceramic granulation powder each and injecting from the two ceramic powder receiving ports, respectively.

[0142] Step 7, start the mechanical press, both sides of the pressure rod pressure head into the mold cavity, the pressure head advances the ceramic powder to close the grid ball core, rotates the plastic rotating handle of the outer wall sleeve before pressing, the magnet drives the rotation of the ball core, the rotating ball core stirs the ceramic granulation powder to fill into the ball core through the grid gap of the ball core, and the first pressure is implemented. When the maximum stroke is reached, the pressing force is close to 800kg / cm2, and the automatic retraction is completed. The first left and right spherical surface pressure is completed.

[0143] Step 8, further, rotate the upper and lower magnet pair plastic rotating handle 90°, the ball blank is suspended 90° by the upper and lower magnet pair, the pressure rod pressure head advances, and the pressure rod pressure head implements pressure on the front and rear spherical surfaces relative to the initial state. The first pressure line of the spherical surface is formed to be eliminated.

[0144] Step 9, further, switch the power supply to the front and rear magnet pair, rotate the front and rear magnet pair plastic rotating handle 90° in the forward direction, and the ball blank is suspended 90° by the front and rear magnet pair. The pressure rod pressure head advances, and the upper and lower spherical surfaces relative to the initial state are completed.

[0145] Step 10, further, rotate the front and rear magnet pair plastic rotating handle 45° in the forward direction, and the pressure rod pressure head advances to complete the pressure on the diagonal spherical surface.

[0146] Step 11, further rotate the front and rear magnet pair plastic rotating handle 90° in the forward direction, and the pressure rod pressure head advances to complete the pressure on the diagonal spherical surface.

[0147] Step 12, turn off the mechanical press, and the pressure rod and the pressure head are retracted to the initial state.

[0148] Step 13, take the left and right sleeves and place the second ball core between the left and right mold cavities of the pressure head, and buckle or rotate the knob to become an integral whole. The left end of the ball core sleeve is inserted from the right end of the pressure head mold cavity cylinder first, and is stopped by the sleeve block. At the same time, the ball blank top head holds the ball blank pressed from the left end of the pressure head mold cavity cylinder, and the buckle or knob is rotated. The left and right sleeves are disassembled and pulled out from both ends of the pressure head mold cavity cylinder, respectively. The second ball core is suspended in the center of the pressure head mold cavity cylinder for pressing.

[0149] In this embodiment, a high-density ball blank with a φ30.6±0.1mm, embedded regular octahedral stainless steel grid ball core and alumina ceramic granulation powder nested with each other is obtained.

[0150] Example 3

[0151] This embodiment provides a method for forming a zirconia ceramic ball blank in an infinite direction by suspension pressing.

[0152] Determination of the spheroidization specifications and quality indicators: φ30 mm, spheroidization specific gravity 6.85±0.02 g / cm3, porcelain density 6.00±0.05 g / cm3, grid ball core casting material density 7.7 g / cm3, and ceramic material surface layer thickness of the coated spheroidization ball core 1㎜;

[0153] Determination of the spheroidization parameters: spheroidization volume 14.10±0.05 cm3, spheroidization weight 96.50±0.20 g, wherein the ceramic material volume is 7.10±0.05 cm3, the grid ball core volume is 7.10±0.05 cm3, the ball core weight is 54.00±0.05 g, and the ceramic material weight is 42.50±0.05 g;

[0154] Determination of the raw materials: 95 zirconia ceramic granulation powder with a loose bulk density of 3.70±0.05 g / cm3(containing yttrium oxide solubilizer) and a loss on ignition of 16% to 18%, 410 stainless steel ball casting material, and alkali-vanadium-silicate-based stainless steel substrate underglaze powder, and the single ball requires granulation powder of 14.00±0.05 cm3;

[0155] Determination of the process conditions: green body pressing force 700 kg / cm2, and sintering temperature 1300 to 1350℃;

[0156] Determination of the spheroidization diameter: φ30.6±0.1 mm;

[0157] Determination of the granulation powder container volume: 7.00 c±0.05 cm3;

[0158] Determination of the press head mold cavity radius: the press head mold cavity radius is 15.20±0.02 mm;

[0159] Determination of the grid ball core lost mold specifications: a single layer of regular octahedron with 8 module bars, 12 prism bars, a module bar length of ≤14㎜, and a grid volume of 7.10±0.05 cm3 is selected to construct the grid ball core lost mold.

[0160] The preparation method comprises:

[0161] Step 1: 3D modeling and printing of the grid ball core lost mold are performed using a single layer of regular octahedron with 8 module bars, 12 prism bars, a module bar length of ≤14㎜, and a grid volume of 7.10±0.05 cm3.

[0162] Step 2: sequentially performing lost mold assembly, 410 stainless steel melting, lost mold pouring, and grid ball core shell breaking and impurity removal to surface cleaning.

[0163] Step 3: selecting the finished alkali-vanadium-silicate-based stainless steel substrate underglaze powder and the finished JN-30 silica sol, and mixing the underglaze powder and the silica sol at a volume ratio of 0.4 to 0.5:1 to form an underglaze immersion coating material.

[0164] Step 4: Dip the grid ball core into the base glaze, let it air dry naturally, and pre-sinter at 600-650℃ for 30-60 minutes.

[0165] Step 5: Pull the ball forming device out from between the outlet ports of the mechanical press head, turn on the power to the upper and lower magnet pairs, place the pre-fired bottom glaze ball core into the ball core sleeve, insert it into the press head mold cavity, rotate the sleeve buckle or knob, and pull out the sleeve. The ball core will be suspended in the center of the press head mold cavity.

[0166] Step 6: Push the pelletizing device to the inner end of the sliding guide rail, and confirm that the two ends of the pelletizing device's pressure head mold cavity are seamlessly connected with the outlet port of the mechanical press head. Use a 7.00±0.05cm3 metering container to measure one part of alumina ceramic granulation powder and inject it into the two ceramic powder receiving ports respectively.

[0167] Step 7: Start the mechanical press and push the ceramic powder towards the grid core with the pressure rod and pressure head. Before pressing, rotate the plastic rotating handwheel of the outer sleeve. The magnet drives the core to rotate. The rotating core stirs the ceramic granulation powder and fills the core through the grid gaps. The first pressing is carried out. When the maximum stroke is reached, the pressing force is close to 800 kg / cm2. It automatically retracts and completes the first pressing of the left and right spheres.

[0168] Step 8: Further, rotate the upper and lower magnets 90° relative to the plastic rotating handwheel, and the ball blank is suspended 90° relative to the upper and lower magnets in the same direction. The pressure rod and pressure head move forward and apply pressure to the front and rear spherical surfaces relative to the initial state. The pressure lines formed by the first pressure on the spherical surface are eliminated.

[0169] Step 9: Further, switch the power supply to the front and rear magnet pair, rotate the plastic rotating handwheel of the front and rear magnet pair 90° in the forward direction, the ball blank is suspended 90° in the forward and rear magnet pair, the pressure rod and pressure head move forward, and the upper and lower ball surfaces are pressed relative to the initial state.

[0170] Step 10: Further, rotate the front and rear magnets at a 45° clockwise position using the plastic rotating handwheel, and the pressure rod head will move forward to complete the pressing of the diagonal spherical surface.

[0171] Step 11: Further rotate the front and rear magnets 90° clockwise to rotate the plastic rotating handwheel, and the pressure rod head moves forward to complete the pressing of the diagonal spherical surface.

[0172] Step 12: Turn off the mechanical press, and retract the pressure bar and pressure head to their initial state.

[0173] Step 13, take the left and right sleeve to the second ball core between the left and right die cavity of the pressure head, buckle or knob into one, the left end of the ball core sleeve first from the right end of the pressure head die cavity cylinder inserted, blocked by the sleeve block stop, while the ball top head catch the ball has been pressed from the left end of the pressure head die cavity cylinder top out, rotate the buckle or knob, left and right sleeve disintegration, respectively from the two ends of the pressure head die cavity cylinder extracted, the second ball core suspended in the pressure head die cavity cylinder central to be pressed.

[0174] The embodiment obtains a high-density ball blank with a φ30.6±0.1mm, an embedded regular octahedron stainless steel grid ball core and a zirconium oxide ceramic granulation powder nested with each other.

[0175] The above is only the preferred specific embodiment of the present application, and any non-fundamental change or replacement based on the innovative path and the claims of the present application should be covered within the protection scope of the present application.

Claims

1. A ceramic ball blank infinite dimension suspension pressure forming process, including magnetic metal grid ball core preparation, grid ball core bottom glaze pretreatment and ball blank pressing three major process sections, the innovative features include: First, the magnetic metal grid ball core is in a single-layer or multi-layer nested regular polyhedral grid spherical configuration with the ball center as the center of gravity; Second, the metal grid ball core and granulated ceramic powder are pressed by the infinite dimension suspension pressure ball forming machine in an infinite dimension suspension pressure manner to obtain an embedded ceramic ball blank.

2. A machine for forming a ball from a suspension of indefinite dimensions, characterised in that, The device composition includes: First, the infinite dimension suspension pressure ball forming machine is composed of a working platform (1-1), a mechanical pressure device, a dry pressure ball forming device and a machine-side ball core sleeve; Second, the mechanical pressure device is provided with one mechanical press (1-2) on the left and one on the right, the pressure head (1-4) and the pressure rod (1-3) are fastened by screw connection, the two pressure heads are closed to form a ball blank mold cavity, the mechanical press (1-2) controls the linear reciprocating motion of the pressure rod (1-3) and the pressure head (1-4) through frequency conversion and speed reduction device; Third, the dry pressure ball forming device is provided with a center pressure head mold cavity cylinder (1-5), the two ends of the pressure head mold cavity cylinder (1-5) are provided with sleeve bearings (1-6), the inner ring of the sleeve bearing (1-6) is fastened with the outer wall of the pressure head mold cavity cylinder (1-5), the outer ring of the bearing is welded with the end of the outer wall sleeve (1-7) on the inner side, and the outer wall of the bearing outer ring is fastened with the outer wall sleeve rotating plastic hand wheel (1-8); Fourth, one ceramic granulation powder receiving port (1-14) is arranged on the outer side of the sleeve bearing; Fifth, two pairs of magnetic bearings (1-9) are arranged symmetrically above and below and front and back in the middle of the sleeve, the outer ring of the magnetic bearing (1-9) is fastened with the outer wall sleeve (1-7), the inner ring of the bearing is fastened with the magnet, the outer side of the magnet is provided with an iron yoke (1-11), the outer ring of the iron yoke (1-11) is fastened with the upper and lower magnetic rotating plastic hand wheel (1-12) and the front and back magnetic rotating plastic hand wheel (1-13); Sixth, the machine-side ball core sleeve is a two-section sleeve connected by straight thread or buckle, the connection end is provided with internal and external threads or buckle, and the port is provided with a hemispherical ball core mold cavity; Seventh, parallel sliding guide rails are arranged on the dry pressure ball forming device platform (1-1) to ensure the guiding accuracy of the ball forming device when it is pulled out and pushed into the middle of the mechanical press (1-2); Eighth, the pressure head mold cavity cylinder (1-5) is seamlessly connected with the outlet port of the mechanical press (1-2) pressure head (1-4) when the ball forming device is pushed to the inner end of the sliding guide rail; Ninth, the sleeve bearing (1-6) and the magnetic bearing (1-9) are non-magnetic material bearings, and the pressure rod (1-3), the pressure head (1-4), the pressure head mold cavity cylinder (1-5), the outer wall sleeve (1-7), the left sleeve (2-1) and the right sleeve (2-2) of the machine-side ball core are all non-magnetic metal.

3. The preparation method according to claim 1, characterized in that, The magnetic metal grid ball core is in a single-layer or multi-layer regular polyhedral grid spherical configuration with the ball center as the center of gravity, the equal length mold strips (3-2) evenly and densely diverge from the ball center (3-1), and the cross sections of the same layer regular polyhedral grid strips (3-3) are all squares with equal areas.

4. The method of claim 1, wherein, The ceramic ball blank is a combination of metal grid ball core and ceramic granulation powder grid nesting.

5. The infinite dimension horizontal pressure forming balling machine according to claim 2, wherein, The mechanical press (1-2) is provided with two parts, left and right, which are identical in type, and the end of the press rod is a press head (1-4) which is fastened in a threaded manner, and the two press heads are combined to form a spherical blank mold cavity.

6. The infinite dimension horizontal pressure forming balling machine according to claim 2, wherein, The dry-pressing balling device is provided with sleeve bearings (1-6) at both ends of the center press rod (1-3) and the press head mold cavity cylinder (1-6), and the outer wall sleeve (1-7) of the center press rod (1-3) and the press head mold cavity cylinder (1-6) is attached to the sleeve bearings (1-6) at both ends, and two pairs of magnet pairs bearings (1-9) are symmetrically arranged on the outer wall sleeve (1-7), and magnet pairs (1-10) are arranged on the magnet pairs bearings (1-9), and the magnet pairs (1-10) are electromagnets with the same magnetic field strength.

7. The infinite-vanishing-point balling press of claim 2, wherein, The bottom glaze metal grid ball nucleus is suspended in the center of the press rod press head mold cavity cylinder (1-6) under the action of magnetic field force, and the ball nucleus and the same orientation magnet pair (1-10) become an integral whole, and the rotating different orientation magnet pair (1-10) and the ball blank are suspended in the rotating direction of the magnet pair (1-10), and the rotating outer wall sleeve (1-7) and the ball blank are suspended in the rotating direction of the sleeve (1-7), and the rotating different orientation magnet pair (1-10) and the combined rotating outer wall sleeve (1-7) and different orientation magnet pair (1-10) and the ball blank change the rotating axis and rotate, and the rotating different orientation magnet pair (1-10) and the ball blank rotate at an arbitrary angle and make infinite-dimensional suspension, and the press head (1-4) implements infinite-dimensional suspension and forming on the ball blank.

8. The infinite-vanishing-point press balling machine according to claim 2, wherein Before the ball blank is first pressed, the outer wall sleeve (1-7) is rotated, the magnet pair (1-10) drives the ball nucleus to rotate, and the rotating ball nucleus stirs the ceramic granulation powder to fill into the ball nucleus through the grid gap of the ball nucleus, which ensures the compactness of the metal grid ball nucleus and the ceramic granulation powder grid.

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