A silicon nitride ceramic ball grinding machine

Abstract

The present invention relates to the technical field of ceramic ball grinding, and specifically relates to a silicon nitride ceramic ball grinding machine, which includes a loading and placing mechanism, a preloading mechanism arranged in the loading and placing mechanism, a plurality of sizing and grinding mechanisms arranged in the preloading mechanism, and an inner door control mechanism arranged on the sizing and grinding mechanism. By providing a screening pad and a guiding ring that can constrain and store ceramic balls of different specifications according to their movement trajectories, after the ceramic balls are evenly distributed in the cavities of the screening pad and the guiding ring, as the device reciprocates along a semi-circular trajectory, the medium particles injected into the inner cavity of the device can enter the cavities of the screening pad and the guiding ring through different paths. At this time, the evenly distributed spheres can rotate along the trajectory in the cavities, and the medium particles can comprehensively grind the spheres, thereby avoiding the phenomenon of ceramic balls being impacted due to excessive movement trajectory amplitude.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic ball grinding, and specifically 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 automotive manufacturing due to their superior properties such as high hardness, wear resistance, corrosion resistance, and low density, which can greatly improve the operating efficiency and durability of equipment.

[0003] After the silicon nitride ceramic balls are selected, they need to be subjected to powder processing, and then the powder is formed into a spherical blank by methods such as isostatic pressing or injection molding. Finally, the formed blank is transferred to a high-temperature furnace for sintering. During sintering, irregular residues will appear on the surface of the balls, so subsequent grinding and polishing are required. Grinding is divided into multiple steps such as rough grinding, semi-finishing grinding, fine grinding, and superfine grinding. However, when the existing grinding equipment grinds the ceramic balls using the movement characteristics of the grinding disc, the balls are prone to problems such as impacts when moving along the trajectory. This movement state combined with the grinding medium will cause defects on the surface of the balls, such as pits, scratches, and scuffs, which will affect the performance and service life of the balls.

[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 technologies.

[0006] To this end, the technical solution adopted by the present invention is as follows:

[0007] A silicon nitride ceramic ball grinding machine includes a bearing and placing mechanism, a pre-installation mechanism arranged in the bearing and placing mechanism, multiple sizing and grinding mechanisms arranged in the pre-installation mechanism, and an inner door control mechanism arranged on the sizing and grinding mechanisms; the bearing and placing mechanism is used to provide a stable bearing capacity for the multiple sizing and grinding mechanisms while providing an effective support platform for the reciprocating shaking of the multiple sizing and grinding mechanisms; the pre-installation mechanism includes a first sealing plate and a second sealing plate, a first positioning frame and two second positioning frames arranged inside the first sealing plate and the second sealing plate; the multiple sizing and grinding mechanisms are arranged on the first positioning frame and the two second positioning frames; the sizing and grinding mechanism includes a ring gasket, two third clamping seats arranged outside the ring gasket, a screening gasket arranged inside the ring gasket, a guiding ring arranged inside the screening gasket, and two end heads installed at both ends of the guiding ring; the inner door control mechanism includes 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.

[0008] In a preferred example, the present invention can be further configured as follows: two symmetrically distributed arc-shaped notches are provided on the inner wall of the ring gasket, and a drainage gap is provided inside the arc-shaped notches;

[0009] A cylindrical groove is provided inside the screening gasket, and a notch communicating with the cylindrical groove is provided on the outside of the screening gasket;

[0010] The drainage gap is used to guide the grinding medium into the notch and the cylindrical groove;

[0011] A gap for guiding the discharge of the grinding medium is provided on the inner wall of the guiding ring;

[0012] The end is made of a flexible material, which is used to reduce the collision during the input and output of the ceramic balls.

[0013] In a preferred example, the present invention can be further configured as follows: the inner door panel includes a first clamp seat movably installed in the arc-shaped notch, a second clamp seat fixedly installed at the bottom outside the first clamp seat, a stability-enhancing guide rod fixedly installed at the top outside the first clamp seat, a compression spring movably installed in the stability-enhancing guide rod, and a second spring arranged outside the compression spring;

[0014] The other end of the compression spring is movably installed on a third clamp seat;

[0015] One end of the second spring bears on the stability-enhancing guide rod, and the other end of the second spring bears on the third clamp seat.

[0016] In a preferred example, the present invention can be further configured as follows: the sizing grinding mechanism further includes a backing plate, and inclined surfaces are provided at both ends of the backing plate;

[0017] The screening gasket is arranged in the slot at the center of both ends of the backing plate, and the backing plate is used to guide the grinding medium inside the drainage gap.

[0018] In a preferred example, the present invention can be further configured as follows: the inner door control mechanism further includes a pull rod movably installed on the second clamp seat and an arc-shaped traction member movably connected to the other end of the pull rod;

[0019] The number of both the pull rod and the arc-shaped traction member is two;

[0020] A base is arranged between the two arc-shaped traction members, and a first spring is arranged on the rod body of the base.

[0021] 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 integrally in a quarter-circular arc structure.

[0022] In a preferred embodiment, the present invention can be further configured as follows: the preloading mechanism further includes a discharging member disposed inside the first sealing plate and a feeding member disposed inside the second sealing plate;

[0023] Plug columns are provided in both the end tubes at the bottom of the discharging member and the end tubes at the top of the feeding member, and sealing caps are provided on the threaded sections of the end tubes.

[0024] In a preferred embodiment, the present invention can be further configured as follows: a loop buckle is provided at a position of the first positioning frame close to the end tube at the bottom of the discharging member, and the loop buckle is snap-fitted to the root of the end tube inside the discharging member;

[0025] Nuts are provided on the threaded sections of both the first positioning frame and the second positioning frame.

[0026] In a preferred embodiment, the present invention can be further configured as follows: the bearing and placing mechanism includes two sealing components, one of the sealing components is disposed on the first sealing plate, and the other sealing component is disposed on the second sealing plate;

[0027] The sealing component is composed of a cushion plate, a gear, a column, and a cross-shaped insertion rod;

[0028] A protective outer chamber is provided between the two sealing components, a hydraulic member is provided on the protective outer chamber, and a support plate is installed at the top of the hydraulic sub-rod inside the hydraulic member.

[0029] In a preferred embodiment, the present invention can be further configured as follows: the bearing and placing mechanism further includes two support frames provided on the two sealing components, a bottom plate provided at the bottom of the two support frames, a chassis provided on the top of the bottom plate, and a motor provided inside the chassis;

[0030] A gear disk is installed at the outer end of the transmission shaft inside the motor, and a chain is drivingly connected to the gear disk, and the other end of the chain is drivingly connected to one of the sealing components.

[0031] By adopting the above technical solutions, the beneficial effects achieved by the present invention are as follows:

[0032] 1. By providing a screening pad and a guiding ring that can constrain and store ceramic balls of different specifications according to the movement trajectory, when the ceramic balls are evenly distributed in the channels of the screening pad and the guiding ring, as the device reciprocates along a semi-circular trajectory, the medium particles injected into the inner cavity of the device can enter the channels of the screening pad and the guiding ring through different paths. At this time, the evenly distributed spheres can rotate along the trajectory in the channels, and the medium particles can comprehensively grind the spheres, thereby avoiding the phenomenon of impact due to excessive movement trajectory amplitude of the ceramic balls.

[0033] 2. The present invention sets multiple groups of sizing and grinding mechanisms evenly distributed, and sets the sizes of the screening pad and the inner cavity of the guiding ring according to the sizes of different ceramic balls. When the batch of ceramic balls to be ground is large, the number of sizing and grinding mechanisms is increased to improve the grinding efficiency. The inner door control mechanism is used to replace the particulate matter inside the device. Finally, the time required for the ceramic balls to go through multiple grinding processes can be saved, and the grinding efficiency of the balls can be improved accordingly.

[0034] 3. In the present invention, two sealing components are respectively fixed to the first sealing plate and the second sealing plate. The reserved gears and cross-shaped insertion rods inside the sealing components respectively provide a docking platform with the chain and the external transmission equipment, so that the turning angle and shaking amplitude of the ceramic balls can be adjusted according to the grinding requirements. The split assembly method can accommodate and deploy more sizing and grinding mechanisms, thus improving the deployment capacity of the ceramic balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram when the present invention is in use;

[0036] Figure 2 is a schematic diagram of the carrying and placing mechanism of the present invention;

[0037] Figure 3 is a schematic diagram of the preloading mechanism of the present invention;

[0038] Figure 4 is the present invention Figure 3 the enlarged schematic diagram of part A in;

[0039] Figure 5 is a partial schematic diagram of the present invention;

[0040] Figure 6 is the exploded schematic diagram of the inner door control mechanism of the present invention;

[0041] Figure 7 is the present invention Figure 6 the exploded schematic diagram of;

[0042] Figure 8 is the present invention Figure 7 the enlarged schematic diagram of part B in;

[0043] Figure 9 is the exploded schematic diagram of the screening pad and the guiding ring of the present invention.

[0044] Reference Signs:

[0045] 100, carrying and placing mechanism; 110, bottom plate; 120, chassis; 130, motor; 140, support frame; 150, sealing component; 160, protective outer bin; 170, hydraulic component; 180, tray; 190, chain;

[0046] 200, Pre-installation mechanism; 210, First sealing plate; 220, Second sealing plate; 230, First positioning frame; 240, Second positioning frame; 250, Discharging part; 260, Feeding part; 270, Plug column; 280, Sealing cover;

[0047] 300, Sizing and grinding mechanism; 310, Ring gasket; 320, Screening gasket part; 330, Guide ring; 340, Drainage gap; 350, Backing plate; 360, End; 370, Third clamp seat;

[0048] 400, Inner door control mechanism; 410, Base; 420, First spring; 430, Arc traction part; 440, Pull rod; 450, Inner door panel; 451, First clamp seat; 452, Second clamp seat; 453, Stability-increasing guide rod; 454, Compression spring; 455, Second spring. Detailed implementation manners

[0049] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the detailed implementation manners and with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0050] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0051] The following describes a silicon nitride ceramic ball grinding machine provided by some embodiments of the present invention with reference to the accompanying drawings.

[0052] Embodiment 1:

[0053] Combined with Figures 1-9 As shown, a silicon nitride ceramic ball grinding machine provided by the present invention includes a loading and placing mechanism 100, a pre-installation mechanism 200 arranged in the loading and placing mechanism 100, multiple groups of sizing and grinding mechanisms 300 arranged in the pre-installation mechanism 200, and an inner door control mechanism 400 arranged on the sizing and grinding mechanisms 300. The loading and placing mechanism 100 is used to provide stable bearing capacity for multiple groups of sizing and grinding mechanisms 300, and at the same time, it can provide an effective support platform for the reciprocating shaking of multiple groups of sizing and grinding mechanisms 300. The pre-installation mechanism 200 is used for the sealed assembly of multiple groups of sizing and grinding mechanisms 300. The sizing and grinding mechanisms 300 are used to provide grinding trajectories for ceramic balls of different specifications. The inner door control mechanism 400 is used to guide different grinding medium particles.

[0054] The loading and placing mechanism 100 includes two sealing components 150, one of the sealing components 150 is arranged on the first sealing plate 210, and the other sealing component 150 is arranged on the second sealing plate 220;

[0055] A protective outer chamber 160 is provided between two sealing assemblies 150, a hydraulic component 170 provided on the protective outer chamber 160, and a support plate 180 mounted at the top of the hydraulic sub-rod inside the hydraulic component 170;

[0056] Two support frames 140 provided on the two sealing assemblies 150, a bottom plate 110 provided at the bottom of the two support frames 140, a chassis 120 provided on the top of the bottom plate 110, and a motor 130 provided inside the chassis 120;

[0057] A gear disc is mounted at the outer end of the transmission shaft inside the motor 130, and a chain 190 is drivingly connected to the gear disc, and the other end of the chain 190 is drivingly connected to one of the sealing assemblies 150;

[0058] The preloading 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 provided inside the first sealing plate 210 and the second sealing plate 220, a discharging member 250 provided on the inner side of the first sealing plate 210, and a feeding member 260 provided on the inner side of the second sealing plate 220;

[0059] Multiple sizing and grinding mechanisms 300 are provided on a first positioning frame 230 and two second positioning frames 240;

[0060] The sizing and grinding mechanism 300 includes an annular gasket 310 and a backing plate 350, two third clamping seats 370 provided outside the annular gasket 310, a screening gasket member 320 provided inside the annular gasket 310, a guiding ring 330 provided inside the screening gasket member 320, and two end heads 360 mounted at both ends of the guiding ring 330;

[0061] The inner door control mechanism 400 includes an inner door panel 450, and the inner door panel 450 is used to provide an effective discharge channel for the grinding medium inside the annular gasket 310;

[0062] The inner door panel 450 includes a first clamping seat 451 movably mounted in an arc-shaped notch, a second clamping seat 452 fixedly mounted at the bottom outside the first clamping seat 451, a stability-increasing guide rod 453 fixedly mounted at the top outside the first clamping seat 451, a compression spring 454 movably mounted inside the stability-increasing guide rod 453, and a second spring 455 provided outside the compression spring 454;

[0063] The other end of the compression spring 454 is movably mounted on the third clamping seat 370;

[0064] One end of the second spring 455 bears on the stability-increasing guide rod 453, and the other end of the second spring 455 bears on the third clamping seat 370.

[0065] Due to the different sizes of ceramic balls, after the ceramic balls of different sizes are made, they need to go through multiple grinding processes to remove defects. Nowadays, in order to improve the precision of ceramic balls, a grinding disc is added inside the grinding equipment, and the ceramic balls are finely ground through the movement track of the grinding disc. However, under this movement mode, the amplitude of the ceramic balls is too large, and the spheres will collide during their movement on the track, which will lead to problems such as pits, scratches and scratches on the surface of the spheres. At the same time, ceramic balls of different sizes are prone to accumulate under the pressure of the grinding medium, which will lead to insufficient grinding of small-sized spheres.

[0066] And this device can prevent the spheres from colliding by setting the screening gasket 320 and the guiding ring 330. According to the different sizes of ceramic balls, the channels inside different groups of screening gaskets 320 and guiding rings 330 can accommodate spheres of different sizes. After ceramic balls of different sizes are evenly distributed inside multiple groups of screening gaskets 320 and guiding rings 330, the two end heads 360 can be flipped to the top state to cooperate with the grinding medium to grind the spheres.

[0067] Since the circular channels formed by the screening gasket 320 and the guiding ring 330 can restrict the movement track of the ceramic balls, when multiple groups of sizing grinding mechanisms 300 reciprocally flip along a semi-circular track in the vertical direction, the grinding medium selectively injected into the inner cavity of the device can polish the spheres rotating in the channels, thus effectively avoiding the problem of collision when the spheres move within the track.

[0068] Embodiment 2:

[0069] Combined with Figure 2 and Figure 7 As shown, on the basis of Embodiment 1, two symmetrically distributed arc-shaped notches are opened on the inner wall of the ring gasket 310, and a drainage gap 340 is arranged inside the arc-shaped notches.

[0070] Both ends of the backing plate 350 are provided with inclined surfaces.

[0071] The screening gasket 320 is arranged in the slots at the center positions of both ends of the backing plate 350, and the backing plate 350 is used to guide the grinding medium inside the drainage gap 340.

[0072] Preferably, the inclined surfaces at both ends of the backing plate 350 are aligned with the bottom ports of the two drainage gaps 340. When the grinding medium fills the inner cavity of the device, the backing plate 350 can provide a platform for the rapid transfer of the medium. At the same time, the grinding medium located on multiple backing plates 350 can enter the inside of the two drainage gaps 340 without hindrance, and then enter the channels inside the screening gasket 320 and the guiding ring 330, so as to comprehensively and finely grind the spheres inside the channels.

[0073] The inner side of the screening pad 320 is provided with a cylindrical groove, and the outer side of the screening pad 320 is provided with a notch communicating with the cylindrical groove;

[0074] The inner wall of the guiding ring 330 is provided with a slit for guiding the discharge of the grinding medium;

[0075] The drainage slit 340 is used to guide the grinding medium into the notch and the cylindrical groove;

[0076] The end 360 is made of a flexible material and is used to reduce the collision during the input and output of the ceramic balls;

[0077] Preferably, the two ends 360 can be made of a flexible material for reducing impact, and the two ends 360 are arranged at both ends of the top of the backing plate 350. When the fine grinding of the ceramic balls is completed and the motor 130 operates to drive the chain 190 and a sealing component 150, the multi-group sizing grinding mechanisms 300 rotating in one direction can slowly transfer the spheres evenly distributed in the cavity, and at this time, the two ends 360 can provide buffer protection for the spheres.

[0078] Embodiment 3:

[0079] Combined with Figure 2 and Figure 6 As shown, on the basis of Embodiment 1, the inner door control mechanism 400 further includes a pull rod 440 movably installed on the second clamp 452 and an arc-shaped traction member 430 movably connected to the other end of the pull rod 440;

[0080] The number of the pull rod 440 and the arc-shaped traction member 430 is two.

[0081] Preferably, the two arc-shaped traction members 430 are located at the central position of the gap between the protective outer bin 160 and the multiple ring pads 310 in the initial state, and the pull rod 440 movably installed at the bottom end of the arc-shaped traction member 430 will provide a further pressing force for the bottom end of the first clamp 451.

[0082] A base 410 is arranged between the two arc-shaped traction members 430, and a first spring 420 is arranged on the rod body of the base 410.

[0083] Preferably, the top end of the first spring 420 is fixedly installed on the top of the inner cavity of the protective outer bin 160, and it is used to provide a rapid reset force for the base 410.

[0084] Preferably, the arc-shaped traction member 430, the pull rod 440 and the base 410 are all made of stainless steel material, and the arc-shaped traction member 430 is integrally in a quarter-circular arc structure.

[0085] Embodiment 4:

[0086] Combined with Figures 1-3As shown in the above embodiments,

[0087] Plug columns 270 are provided in both the end pipes at the bottom of the discharging member 250 and the end pipes at the top of the feeding member 260, and sealing caps 280 are provided on the threaded sections of the end pipes.

[0088] Preferably, the reciprocating flipping of the feeding member 260 and the discharging member 250 does not affect the input of the grinding medium;

[0089] When the ceramic balls are fully polished and accompanied by the evacuation of the medium particles, the end pipes on the discharging member 250 and the feeding member 260 can also provide a discharging path for the spheres.

[0090] A ring buckle is provided at the part of the first positioning frame 230 close to the end pipe at the bottom of the discharging member 250, and the ring buckle is clamped at the root of the end pipe inside the discharging member 250;

[0091] Nuts are provided on the threaded sections of the first positioning frame 230 and the second positioning frame 240.

[0092] Preferably, the lengths of the first positioning frame 230, the second positioning frame 240, and the protective outer bin 160 need to be set according to actual needs, and the pallet 180 is connected to a plurality of bases 410.

[0093] Preferably, the sealing assembly 150 is composed of a cushion plate, a gear, a column, and a cross-shaped insertion rod.

[0094] The working principle and usage process of the present invention: Set multiple groups of sizing grinding mechanisms 300 according to the total amount of ceramic balls to be ground, use the first sealing plate 210 and the second sealing plate 220 as the sealing assemblies of the outermost two groups of sizing grinding mechanisms 300, and use one first positioning frame 230 and two second positioning frames 240 to fix the multiple groups of sizing grinding mechanisms 300 to the first sealing plate 210 and the second sealing plate 220. At this time, the inner cavities of adjacent ring gaskets 310 will form a communicating cavity. When the multiple ring gaskets 310 are assembled, it is necessary to adjust the positions of the two end heads 360 at the bottom of the guiding ring 330;

[0095] According to the specifications of different ceramic balls, place the ceramic balls of the same specification in the circular hole channels formed by each group of screening pad members 320 and the guiding ring 330 in sequence. At this time, the two end heads 360 are flipped from the state of being at the bottom in the drawing to directly above;

[0096] After the above components form a sealed cavity, remove the sealing cover 280 on the bottom end pipe of the discharging member 250, then pull out the plug post 270 at this position, and then pour the abrasive medium particles into the end pipe of the discharging member 250 that is turned upwards. After the medium particles are injected into the sealed cavity formed by the above components to a regular amount, one of the removed sealing covers 280 and plug posts 270 can be reinstalled into the end pipe of the discharging member 250. Then, use an external transmission device to dock with the cross-shaped insertion rod in the sealing component 150. When the external transmission device makes a reciprocating semi-circular rotation in the vertical direction, the protective outer chamber 160 and multiple sets of sizing and grinding mechanisms 300 can shake simultaneously. At this time, the medium in the sealed channel will enter the slot inside the screening pad member 320 along the drainage gap 340. At the same time, part of the medium will also enter through the gap on the inner wall of the guiding ring 330. At this time, the ceramic balls restricted by the channels of the screening pad member 320 and the guiding ring 330 can be ground by the abrasive medium particles in a state of avoiding impact;

[0097] At this time, the ceramic balls evenly distributed in the channels of the screening pad member 320 and the guiding ring 330 will rotate self - clockwise under the reciprocating rotation movement. At the same time, restricted by the inner diameter of the channel on the trajectory of the ball, the medium will grind the surface of the self - rotating ball. Thus, while the ceramic balls can be efficiently ground, it can also avoid problems such as pits, abrasions, and scratches that occur when the existing equipment cannot specify the grinding trajectory of the balls. At the same time, ceramic balls of different sizes can be batch - ground under the same abrasive medium particles, and the device can also avoid the phenomenon of accumulation when different - sized ceramic balls come into contact.

[0098] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. 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 carrying 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 medium inside the ring gasket (310); 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 the collision of the ceramic balls during input and output; 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).

2. The silicon nitride ceramic ball grinding machine according to claim 1, wherein, 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).

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

4. The silicon nitride ceramic ball grinding machine according to claim 3, wherein, The arc-shaped traction member (430), the pull rod (440) and the base (410) are all made of stainless steel material, and the arc-shaped traction member (430) is integrally in a quarter-circular arc structure.

5. The silicon nitride ceramic ball grinding machine according to claim 1, characterized in that, The preloading mechanism (200) further includes a discharging member (250) arranged inside the first sealing plate (210) and a feeding member (260) arranged inside the second sealing plate (220); Plug columns (270) are arranged inside the end pipes at the bottom of the discharging member (250) and the end pipes at the top of the feeding member (260), and sealing caps (280) are arranged on the threaded sections of the end pipes.

6. The silicon nitride ceramic ball grinding machine according to claim 1, characterized in that, A loop is arranged at a position of the first positioning frame (230) close to the end pipe at the bottom of the discharging member (250), and the loop is clamped at the root of the end pipe inside the discharging member (250); Nuts are arranged on the threaded sections of the first positioning frame (230) and the second positioning frame (240).

7. A silicon nitride ceramic ball grinding machine according to claim 1, characterized in that, The carrying and placing mechanism (100) includes two sealing components (150), one of the sealing components (150) is arranged on the first sealing plate (210), and the other sealing component (150) is arranged on the second sealing plate (220); The sealing component (150) is composed of a cushion plate, a gear, a column and a cross-shaped insertion rod; A protective outer bin (160), a hydraulic component (170) arranged on the protective outer bin (160) and a support plate (180) installed at the top of the hydraulic sub-rod inside the hydraulic component (170) are arranged between the two sealing components (150).

8. A silicon nitride ceramic ball grinding machine according to claim 7, characterized in that, The carrying and placing mechanism (100) further includes two support frames (140) arranged on the two sealing components (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 inside the chassis (120); A gear disc is installed at the outer end of the transmission shaft inside the motor (130), a chain (190) is drivingly connected to the gear disc, and the other end of the chain (190) is drivingly connected to one of the sealing components (150).

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