Silicon nitride ceramic ball grinding machine

Abstract

The invention relates to the technical field of ceramic ball grinding, in particular to a silicon nitride ceramic ball grinding machine which comprises a bearing storage mechanism, a preassembling mechanism arranged in the bearing storage mechanism, a plurality of sizing grinding mechanisms arranged in the preassembling mechanism and an inner door control mechanism arranged on the sizing grinding mechanisms. By arranging the screening pad piece and the guide ring which can be used for restraining and storing ceramic balls of different specifications according to movement tracks, after the ceramic balls are evenly distributed in cavity channels of the screening pad piece and the guide ring, the ceramic balls shake back and forth along a semicircular track along with the device; according to the ceramic ball screening device, the medium particles injected into the inner cavity of the device can enter the cavity channels of the screening cushion piece and the guide ring in different paths, at the moment, the evenly-distributed balls can rotate in the cavity channels according to the tracks, the medium particles can comprehensively grind the balls, and therefore the phenomenon that the ceramic balls are impacted due to the fact that the amplitude of the motion track is too large is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic ball grinding, in particular to a silicon nitride ceramic ball grinding machine. Background Art

[0002] Silicon nitride ceramic balls are widely used in ceramic ball bearings, precision instruments, aerospace, and automobile manufacturing due to their superior properties such as high hardness, wear resistance, corrosion resistance, and low density. They can greatly improve the operating efficiency and durability of the equipment.

[0003] After material selection, silicon nitride ceramic balls need to be processed into powder, and then the powder is made into a spherical embryo by isostatic pressing or injection molding. Finally, the formed embryo is transferred to a high-temperature furnace for sintering. During sintering, irregular residues will appear on the surface of the sphere, so it is necessary to perform grinding and polishing afterwards. The grinding is divided into coarse grinding, semi-fine grinding, fine grinding and super-fine grinding. However, when existing grinding equipment uses the motion characteristics of the grinding disk to grind ceramic balls, the sphere is prone to collisions and other problems as it moves along the trajectory. This motion state combined with the grinding medium will cause defects on the surface of the sphere, such as pits, abrasions and scratches, which will affect the performance and service life of the sphere.

[0004] In view of this, the present invention designs a silicon nitride ceramic ball grinding machine to solve the above problems. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted in the present invention is: A silicon nitride ceramic ball grinding machine comprises a bearing mechanism, a pre-installation mechanism arranged in the bearing mechanism, a plurality of sizing grinding mechanisms arranged in the pre-installation mechanism, and an inner door control mechanism arranged on the sizing grinding mechanism; the bearing mechanism is used to provide a stable bearing capacity for the plurality of sizing grinding mechanisms, and at the same time provide an effective support platform for the reciprocating shaking of the plurality of sizing grinding mechanisms; the pre-installation mechanism comprises a first sealing plate and a second sealing plate, a first positioning frame and two second positioning frames arranged in the first sealing plate and the second sealing plate; the plurality of sizing grinding mechanisms are arranged on a first positioning frame and two second positioning frames; the sizing grinding mechanism comprises a ring gasket, two third clamping seats arranged outside the ring gasket, a screening pad arranged inside the ring gasket, a guide ring arranged inside the screening pad, and two end heads installed at both ends of the guide ring; the inner door control mechanism comprises an inner door plate, and the inner door plate is used to provide an effective discharge channel for the grinding medium inside the ring gasket.

[0007] In a preferred example, the present invention can be further configured as follows: the inner wall of the ring gasket is provided with two symmetrically distributed arc-shaped notches, and the inner side of the arc-shaped notches is provided with drainage gaps; The inner side of the screening cushion is provided with a cylindrical groove, and the outer side of the screening cushion is provided with a notch connected to the cylindrical groove; The drainage gap is used to guide the grinding medium into the notch and the cylindrical groove; The inner wall of the guide ring is provided with a gap for guiding the discharge of the grinding medium; The end head is made of flexible material and is used to reduce collisions during the input and output of the ceramic balls.

[0008] In a preferred example, the present invention can be further configured as follows: the inner door panel includes a first clamp seat movably mounted in the arc-shaped notch, a second clamp seat fixedly mounted on the outer bottom of the first clamp seat, a stabilizing guide rod fixedly mounted on the outer top of the first clamp seat, a compression spring movably mounted in the stabilizing guide rod, and a second spring arranged outside the compression spring; The other end of the compression spring is movably mounted on the third clamping seat; One end of the second spring is pressed on the stabilizing guide rod, and the other end of the second spring is pressed on the third clamping seat.

[0009] In a preferred example, the present invention can be further configured as follows: the sizing grinding mechanism further includes a backing plate, and both ends of the backing plate are provided with inclined surfaces; The screening pads are arranged in slots at the center positions of both ends of the pad, and the pad is used to guide the grinding medium inside the drainage gap.

[0010] In a preferred example, the present invention can be further configured as follows: the inner door control mechanism further includes a pull rod movably mounted on the second clamping seat and an arc-shaped pulling member movably connected to the other end of the pull rod; The number of the pull rod and the arc-shaped pulling member are both two; A base is arranged between the two arc-shaped traction members, and a first spring is arranged on the rod body of the base.

[0011] In a preferred example, the present invention can be further configured as follows: the arc-shaped traction member, the pull rod and the base are all made of stainless steel material, and the arc-shaped traction member is an overall quarter-circular arc structure.

[0012] In a preferred example, the present invention can be further configured as follows: the pre-installation mechanism further includes a discharge member arranged on the inner side of the first sealing plate, and a feed member arranged on the inner side of the second sealing plate; The end tube at the bottom of the discharge piece and the end tube at the top of the feed piece are both provided with plugs, and the threaded sections of the end tubes are provided with sealing covers.

[0013] In a preferred example, the present invention can be further configured as follows: a buckle is provided at a position of the first positioning frame close to the bottom end tube of the discharge piece, and the buckle is clamped at the root of the end tube in the discharge piece; Nuts are disposed on the threaded sections of the first positioning frame and the second positioning frame.

[0014] In a preferred example, the present invention can be further configured as follows: the object-carrying mechanism includes two sealing components, one of which is disposed on the first sealing plate, and the other is disposed on the second sealing plate; The sealing assembly is composed of a washer, a gear, a column and a cross-shaped plunger; A protective outer bin is arranged between the two sealing components, a hydraulic component is arranged on the protective outer bin, and a supporting plate is installed on the top end of the hydraulic sub-rod in the hydraulic component.

[0015] In a preferred example, the present invention can be further configured as follows: the load-bearing and storage mechanism further includes two brackets arranged on the two sealing components, a bottom plate arranged at the bottom of the two brackets, a chassis arranged on the top of the bottom plate, and a motor arranged in the chassis; A gear plate is installed at the outer end of the transmission shaft in the motor, and a chain is transmission-connected to the gear plate, while the other end of the chain is transmission-connected to one of the sealing components.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are: 1. The present invention provides screening pads and guide rings that can constrain and accommodate ceramic balls of different specifications according to their motion trajectories. After the ceramic balls are evenly distributed in the cavities of the screening pads and guide rings, as the device reciprocates along a semicircular trajectory, medium particles injected into the inner cavity of the device can enter the cavities of the screening pads and guide rings in different paths. At this time, the evenly distributed balls can rotate in the cavities according to the trajectories, and the medium particles can fully grind the balls, thereby avoiding the phenomenon of ceramic balls colliding due to excessive amplitude of the motion trajectory.

[0017] 2. The present invention arranges multiple groups of sizing and grinding mechanisms evenly distributed, and sets the sizes of the screening pads and the inner cavities of the guide rings according to the sizes of different ceramic balls. When the batch of ceramic balls to be ground is large, the grinding efficiency is improved by increasing the number of sizing and grinding mechanisms, and the internal door control mechanism is used to replace the particle matter in the device. Ultimately, the time required for the ceramic balls to go through multiple grinding processes can be saved, and the efficiency of ball grinding can be easily improved.

[0018] 3. In the present invention, the two sealing assemblies are fixed to the first sealing plate and the second sealing plate respectively, and the gears and cross-shaped rods reserved in the sealing assemblies are used to provide docking platforms with the chain and the external transmission equipment respectively, so that the flip angle and shaking amplitude of the ceramic ball can be adjusted according to the grinding requirements, and the split assembly method can accommodate the deployment of more sizing grinding mechanisms, thereby increasing the capacity for the deployment of ceramic balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the present invention when used; Figure 2 is a schematic diagram of the carrying and placing mechanism of the present invention; Figure 3 It is a schematic diagram of the pre-installation mechanism of the present invention; Figure 4 For the present invention Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 It is a partial schematic diagram of the present invention; Figure 6 It is an exploded schematic diagram of the inner door control mechanism of the present invention; Figure 7 For the present invention Figure 6 Explosion diagram of Figure 8 For the present invention Figure 7 The enlarged schematic diagram of point B in the middle; Fig. 9 It is an exploded schematic diagram of the screening pad and the guide ring of the present invention.

[0020] Reference numerals: 100, load-bearing storage mechanism; 110, bottom plate; 120, chassis; 130, motor; 140, support frame; 150, sealing assembly; 160, protective outer compartment; 170, hydraulic components; 180, support plate; 190, chain; 200, pre-installation mechanism; 210, first sealing plate; 220, second sealing plate; 230, first positioning frame; 240, second positioning frame; 250, discharge member; 260, feeding member; 270, plug; 280, sealing cover; 300, sizing and grinding mechanism; 310, ring pad; 320, screening pad; 330, guide ring; 340, drainage gap; 350, backing plate; 360, end; 370, third clamping seat; 400, inner door control mechanism; 410, base; 420, first spring; 430, arc-shaped traction member; 440, pull rod; 450, inner door panel; 451, first clamp seat; 452, second clamp seat; 453, stabilizing guide rod; 454, compression spring; 455, second spring. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0022] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0023] A silicon nitride ceramic ball grinding machine provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0024] Embodiment 1: Combination Figure 1-Figure 9 As shown, a silicon nitride ceramic ball grinding machine provided by the present invention includes a loading and placing mechanism 100, a pre-installing mechanism 200 arranged in the loading and placing mechanism 100, a plurality of sizing grinding mechanisms 300 arranged in the pre-installing mechanism 200, and an inner door control mechanism 400 arranged on the sizing grinding mechanism 300, wherein the loading and placing mechanism 100 is used to provide a stable bearing capacity for the plurality of sizing grinding mechanisms 300, and at the same time, provide an effective supporting platform for the reciprocating shaking of the plurality of sizing grinding mechanisms 300, the pre-installing mechanism 200 is used to perform sealing assembly for the plurality of sizing grinding mechanisms 300, the sizing grinding mechanisms 300 are used to provide grinding tracks for ceramic balls of different specifications, and the inner door control mechanism 400 is used to guide particles of different grinding media.

[0025] The object carrying and placing mechanism 100 includes two sealing assemblies 150 , wherein one sealing assembly 150 is disposed on the first sealing plate 210 , and the other sealing assembly 150 is disposed on the second sealing plate 220 ; A protective outer chamber 160 is disposed between the two sealing assemblies 150 , a hydraulic component 170 disposed on the protective outer chamber 160 , and a support plate 180 installed on the top end of the hydraulic sub-rod in the hydraulic component 170 ; Two brackets 140 disposed on two sealing assemblies 150, a bottom plate 110 disposed at the bottom of the two brackets 140, a chassis 120 disposed on the top of the bottom plate 110, and a motor 130 disposed in the chassis 120; A gear plate is installed at the outer end of the transmission shaft in the motor 130, and a chain 190 is transmission-connected to the gear plate, and the other end of the chain 190 is transmission-connected to one of the sealing assemblies 150; The pre-installation mechanism 200 includes a first sealing plate 210 and a second sealing plate 220, a first positioning frame 230 and two second positioning frames 240 disposed in the first sealing plate 210 and the second sealing plate 220, a discharge member 250 disposed inside the first sealing plate 210, and a feeding member 260 disposed inside the second sealing plate 220; The multiple sizing and grinding mechanisms 300 are arranged on a first positioning frame 230 and two second positioning frames 240; The sizing grinding mechanism 300 includes a ring pad 310 and a pad 350, two third clamping seats 370 arranged outside the ring pad 310, a screening pad 320 arranged inside the ring pad 310, a guide ring 330 arranged inside the screening pad 320, and two end caps 360 installed at both ends of the guide ring 330; The inner door control mechanism 400 includes an inner door plate 450, which is used to provide an effective discharge channel for the grinding media inside the ring pad 310; The inner door panel 450 includes a first clamping seat 451 movably mounted in the arc-shaped notch, a second clamping seat 452 fixedly mounted on the outer bottom of the first clamping seat 451, a stabilizing guide rod 453 fixedly mounted on the outer top of the first clamping seat 451, a compression spring 454 movably mounted in the stabilizing guide rod 453, and a second spring 455 arranged outside the compression spring 454; The other end of the compression spring 454 is movably mounted on the third clamping seat 370; One end of the second spring 455 is pressed on the stabilizing guide rod 453 , and the other end of the second spring 455 is pressed on the third clamping seat 370 .

[0026] Since ceramic balls are of different sizes, they need to go through multiple grinding processes to remove defects after being manufactured. In order to improve the precision of ceramic balls, grinding discs are added to the grinding equipment to fine-grind the ceramic balls according to the motion trajectory of the grinding disc. However, the amplitude of the ceramic balls under this motion mode is too large, and the movement of the balls on the motion trajectory will cause collisions, which will cause pits, abrasions and scratches on the surface of the balls. At the same time, ceramic balls of different sizes are prone to accumulation under the pressure of the grinding medium, which will lead to insufficient grinding of small-sized balls.

[0027] The device is provided with screening pads 320 and guide rings 330. According to the different sizes of ceramic balls, the cavities inside different groups of screening pads 320 and guide rings 330 can prevent collision and accommodate balls of different sizes. When the ceramic balls of different sizes are evenly distributed inside the multiple groups of screening pads 320 and guide rings 330, the two ends 360 are turned to the top state to cooperate with the grinding medium to grind the balls. Since the circular cavity formed by the screening pad 320 and the guide ring 330 can constrain the movement trajectory of the ceramic ball, as the multiple sets of sizing grinding mechanisms 300 reciprocate along the semicircular trajectory in the vertical direction, the grinding medium selectively injected into the inner cavity of the device can polish the rotating ball in the cavity, thereby effectively avoiding the problem of collision of the ball when moving in the trajectory.

[0028] Embodiment 2: Combination Figure 2 and Figure 7 As shown, based on Example 1, the inner wall of the ring gasket 310 is provided with two symmetrically distributed arc-shaped notches, and a drainage gap 340 is provided inside the arc-shaped notches; The backing plate 350 has inclined surfaces at both ends; The screening pad 320 is disposed in the slots at the center positions of both ends of the pad 350 , and the pad 350 is used to guide the grinding media inside the drainage gap 340 .

[0029] Preferably, the inclined surfaces at both ends of the pad 350 are aligned with the ports at the bottom of the two drainage gaps 340. When the grinding medium is filled into the inner cavity of the device, the pad 350 can provide a platform for rapid transfer of the medium. At the same time, the grinding medium located on multiple pads 350 can enter the inner side of the two drainage gaps 340 unimpeded, and then enter the cavity inside the screening pad 320 and the guide ring 330, so that the spheres in the cavity can be fully finely ground.

[0030] A cylindrical groove is formed on the inner side of the screening cushion 320, and a notch connected to the cylindrical groove is formed on the outer side of the screening cushion 320; The inner wall of the guide ring 330 is provided with a gap for guiding the discharge of the grinding medium; The drainage gap 340 is used to guide the grinding media into the notch and the cylindrical groove; The end 360 is made of flexible material to reduce the collision of ceramic balls during input and output; Preferably, the two end heads 360 can be made of a flexible material that can reduce impact, and the two end heads 360 are arranged at both ends of the top of the pad 350. After the ceramic ball is finely ground, the motor 130 runs and drives the chain 190 and a sealing assembly 150. The multiple groups of sizing grinding mechanisms 300 rotating in one direction can slowly transfer the balls evenly distributed in the cavity. At this time, the two end heads 360 can provide buffering protection for the balls.

[0031] Embodiment 3: Combination Figure 2 and Figure 6 As shown, based on the embodiment 1, the inner door control mechanism 400 further includes a pull rod 440 movably mounted on the second clamping seat 452 and an arc-shaped pulling member 430 movably connected to the other end of the pull rod 440; There are two pull rods 440 and two arc-shaped pulling members 430 .

[0032] Preferably, the two arc-shaped traction members 430 are initially located at the center of the gap between the protective outer bin 160 and the plurality of ring pads 310 , and the pull rod 440 movably mounted at the bottom end of the arc-shaped traction member 430 provides further clamping force for the bottom end of the first clamp seat 451 .

[0033] A base 410 is disposed between the two arc-shaped pulling members 430 , and a first spring 420 is disposed on a rod of the base 410 .

[0034] Preferably, the top end of the first spring 420 is fixedly mounted on the top of the inner cavity of the protective outer bin 160 , and is used to provide a rapid restoring force for the base 410 .

[0035] Preferably, the arc-shaped traction member 430 , the pull rod 440 and the base 410 are all made of stainless steel, and the arc-shaped traction member 430 is a quarter-circular arc structure as a whole.

[0036] Embodiment 4: Combination Figure 1-Figure 3 As shown, in the above embodiment, A plug 270 is disposed in the end tube at the bottom of the discharge member 250 and the end tube at the top of the feed member 260, and a sealing cover 280 is disposed on the threaded section of the end tube.

[0037] Preferably, the reciprocating turning of the feeding member 260 and the discharging member 250 will not affect the input of the grinding medium; When the ceramic balls are fully polished and the accompanying medium particles are emptied, the end tubes on the discharge member 250 and the feed member 260 can also provide a discharge path for the balls.

[0038] A buckle is provided at the position of the first positioning frame 230 close to the bottom end tube of the discharge piece 250, and the buckle is clamped at the root of the end tube in the discharge piece 250; Nuts are disposed on the threaded sections of the first positioning frame 230 and the second positioning frame 240 .

[0039] Preferably, the lengths of the first positioning frame 230 , the second positioning frame 240 and the protective outer chamber 160 need to be set according to actual needs, wherein the support plate 180 is connected to a plurality of bases 410 .

[0040] Preferably, the sealing assembly 150 is composed of a washer, a gear, a column and a cross-shaped rod.

[0041] The working principle and use process of the present invention are as follows: multiple groups of sizing grinding mechanisms 300 are set according to the total amount of ceramic balls to be ground, the first sealing plate 210 and the second sealing plate 220 are used as sealing components of the two outermost groups of sizing grinding mechanisms 300, and a first positioning frame 230 and two second positioning frames 240 are used to fix the multiple groups of sizing grinding mechanisms 300 and the first sealing plate 210 and the second sealing plate 220. At this time, the inner cavities of the adjacent multiple ring gaskets 310 will form a connected cavity. When the multiple ring gaskets 310 are assembled, the positions of the two end caps 360 at the bottom of the guide ring 330 need to be adjusted; According to the specifications of different ceramic balls, ceramic balls of uniform specifications are placed in the annular channels formed by each group of screening pads 320 and guide rings 330, and the two end heads 360 are flipped from the bottom-placed state in the figure to the top; After the above components form a sealed cavity, the sealing cap 280 on the bottom end tube of the discharge piece 250 is removed, and then the plug 270 there is pulled out, and then the grinding medium particles are poured into the end tube of the discharge piece 250 that is turned upside down. After the medium particles are injected into the sealed cavity formed by the above components to a prescribed amount, the removed sealing cap 280 and plug 270 can be reinstalled in the end tube of the discharge piece 250, and then the external transmission device and the cross-shaped plug rod in the sealing component 150 are used to When the external transmission device performs a semicircular reciprocating rotation in the vertical direction, the protective outer chamber 160 and the multiple sizing grinding mechanisms 300 can be shaken simultaneously. At this time, the medium in the sealed cavity will enter the notch inside the screening pad 320 along the drainage gap 340. At the same time, part of the medium will enter from the gap on the inner wall of the guide ring 330. At this time, the ceramic balls constrained by the cavity of the screening pad 320 and the guide ring 330 can be ground by the medium particles without being hit. At this time, the ceramic balls evenly distributed in the cavities of the screening pad 320 and the guide ring 330 will rotate with the reciprocating flipping movement. At the same time, the medium will grind the surface of the rotating spheres due to the constraint of the inner diameter of the cavity on the trajectory of the spheres, thereby improving the efficient grinding of the ceramic balls and avoiding collisions when the existing equipment cannot specify the grinding trajectory of the balls, thereby forming problems such as pits, abrasions, and scratches. At the same time, ceramic balls of different sizes can be batch ground under the same medium particles, and the device can avoid the accumulation of ceramic balls of different sizes after contact.

[0042] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A silicon nitride ceramic ball grinding machine, comprising a loading and placing mechanism (100), characterized in that: It also includes a pre-installation mechanism (200) disposed in the object-carrying mechanism (100), a plurality of sizing and grinding mechanisms (300) disposed in the pre-installation mechanism (200), and an inner door control mechanism (400) disposed on the sizing and grinding mechanism (300); The load-bearing and placing mechanism (100) is used to provide a stable load-bearing capacity for the multiple sets of sizing and grinding mechanisms (300), and at the same time provide an effective supporting platform for the reciprocating shaking of the multiple sets of sizing and grinding mechanisms (300); The pre-installation mechanism (200) comprises a first sealing plate (210) and a second sealing plate (220), a first positioning frame (230) and two second positioning frames (240) arranged inside the first sealing plate (210) and the second sealing plate (220); A plurality of groups of the sizing and grinding mechanisms (300) are arranged on a first positioning frame (230) and two second positioning frames (240); The sizing grinding mechanism (300) comprises a ring gasket (310), two third clamping seats (370) arranged outside the ring gasket (310), a screening gasket (320) arranged inside the ring gasket (310), a guide ring (330) arranged inside the screening gasket (320), and two end caps (360) installed at both ends of the guide ring (330); The inner door control mechanism (400) comprises an inner door plate (450), and the inner door plate (450) is used to provide an effective discharge channel for the grinding media inside the ring gasket (310).

2. A silicon nitride ceramic ball grinding machine according to claim 1, characterized in that: The inner wall of the ring gasket (310) is provided with two symmetrically distributed arc-shaped notches, and a drainage gap (340) is provided inside the arc-shaped notches; A cylindrical groove is provided on the inner side of the screening cushion (320), and a notch connected to the cylindrical groove is provided on the outer side of the screening cushion (320); The drainage gap (340) is used to guide the grinding medium into the notch and the cylindrical groove; The inner wall of the guide ring (330) is provided with a gap for guiding the discharge of the grinding medium; The end head (360) is made of a flexible material and is used to reduce collisions that occur during the input and output of the ceramic balls.

3. A silicon nitride ceramic ball grinding machine according to claim 1, characterized in that: The inner door panel (450) comprises a first clamping seat (451) movably mounted in the arc-shaped notch, a second clamping seat (452) fixedly mounted on the outer bottom of the first clamping seat (451), a stabilizing guide rod (453) fixedly mounted on the outer top of the first clamping seat (451), a compression spring (454) movably mounted in the stabilizing guide rod (453), and a second spring (455) arranged outside the compression spring (454); The other end of the compression spring (454) is movably mounted on the third clamping seat (370); One end of the second spring (455) is pressed on the stabilization guide rod (453), and the other end of the second spring (455) is pressed on the third clamping seat (370).

4. A silicon nitride ceramic ball grinding machine according to claim 1, characterized in that: The sizing grinding mechanism (300) further comprises a backing plate (350), and both ends of the backing plate (350) are provided with inclined surfaces; The screening pad (320) is arranged in slots at the center positions of both ends of the pad (350), and the pad (350) is used to guide the grinding medium inside the drainage gap (340).

5. A silicon nitride ceramic ball grinding machine according to claim 1, characterized in that: The inner door control mechanism (400) further comprises a pull rod (440) movably mounted on the second clamping seat (452) and an arc-shaped pulling member (430) movably connected to the other end of the pull rod (440); The number of the pull rod (440) and the number of the arc-shaped pulling member (430) are both two; A base (410) is provided between the two arc-shaped traction members (430), and a first spring (420) is provided on a rod body of the base (410).

6. A silicon nitride ceramic ball grinding machine according to claim 5, characterized in that: The arc-shaped traction member (430), the pull rod (440) and the base (410) are all made of stainless steel, and the arc-shaped traction member (430) is in a quarter-circular arc shape as a whole.

7. The silicon nitride ceramic ball grinding machine according to claim 1, characterized in that: The pre-installation mechanism (200) further comprises a material discharging member (250) arranged on the inner side of the first sealing plate (210), and a material feeding member (260) arranged on the inner side of the second sealing plate (220); A plug (270) is provided in the end tube at the bottom of the discharge member (250) and the end tube at the top of the feed member (260), and a sealing cover (280) is provided on the threaded section of the end tube.

8. The silicon nitride ceramic ball grinding machine according to claim 1, characterized in that: A buckle is provided at a position of the first positioning frame (230) close to the bottom end tube of the discharge piece (250), and the buckle is clamped at the root of the end tube in the discharge piece (250); Nuts are provided on the threaded sections of the first positioning frame (230) and the second positioning frame (240).

9. The silicon nitride ceramic ball grinding machine according to claim 1, characterized in that: The object-carrying mechanism (100) comprises two sealing assemblies (150), wherein one of the sealing assemblies (150) is arranged on a first sealing plate (210), and the other of the sealing assemblies (150) is arranged on a second sealing plate (220); The sealing assembly (150) is composed of a washer, a gear, a column and a cross-shaped insert rod; A protective outer bin (160), a hydraulic component (170) disposed on the protective outer bin (160), and a support plate (180) installed at the top end of a hydraulic sub-rod in the hydraulic component (170) are arranged between the two sealing assemblies (150).

10. The silicon nitride ceramic ball grinding machine according to claim 9, characterized in that: The object-carrying mechanism (100) further comprises two support frames (140) arranged on the two sealing assemblies (150), a bottom plate (110) arranged at the bottom of the two support frames (140), a chassis (120) arranged on the top of the bottom plate (110), and a motor (130) arranged in the chassis (120); A gear plate is installed at the outer end of the transmission shaft in the motor (130), and a chain (190) is drivingly connected to the gear plate, while the other end of the chain (190) is drivingly connected to one of the sealing assemblies (150).

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