CN215469987U - Centerless grinding machine for processing sapphire crystal - Google Patents

Abstract

The application discloses a centerless grinding machine for processing sapphire crystals, which comprises a machine tool, a grinding wheel mechanism, a guide wheel mechanism, a bearing mechanism, a waste liquid recovery mechanism and an automatic liquid discharging mechanism, wherein the grinding wheel mechanism and the guide wheel mechanism are both arranged at the top of the machine tool; the grinding wheel mechanism includes the emery wheel, wheel carrier and first driving piece, guide wheel mechanism includes the guide pulley, the guide pulley carrier, second driving piece and slider, the lathe is provided with the spout, bear the mechanism including bearing piece, I-shaped spare, backup pad and lock nut, the bilateral symmetry of backup pad bottom is provided with clamping screw, I-shaped spare symmetry is provided with the first screw that supplies clamping screw to wear through, the lock nut cover is located clamping screw, this application can change the inclination of backup pad through adjusting first screw and clamping screw, and then adjust the interval of two backup pads, process the sapphire crystal bar of different diameters, and the practicality is high.

Description

Centerless grinding machine for processing sapphire crystal

Technical Field

The invention relates to the field of sapphire processing equipment, in particular to a centerless grinding machine for processing sapphire crystals.

Background

The centerless grinder is a machine tool for grinding the surface of a workpiece by using a grinding tool, is generally used for large-batch processing of round bar parts, has the characteristics of high modularization degree, high grinding precision, high working efficiency and the like, and is widely applied to the fields of vehicle parts, aerospace parts and the like.

The sapphire crystal is aluminum oxide, has the characteristics of high hardness, high brittleness and the like, and is processed by a centerless grinder in an auxiliary manner. The support piece that is used for supporting the sapphire crystal among the present centerless grinder is the structure of unadjustable, has restricted support piece's application scope, only can support the sapphire crystal bar of specific crystal bar diameter, reduces support piece's practicality for centerless grinder's practicality is lower.

SUMMERY OF THE UTILITY MODEL

The application provides a centerless grinding machine for processing sapphire crystals in order to support the problem that the support piece of sapphire crystals is not adjustable.

The application provides a centerless grinder for processing sapphire crystal adopts following technical scheme:

a centerless grinding machine for processing sapphire crystals comprises a machine tool, a grinding wheel mechanism, a guide wheel mechanism, a bearing mechanism, a waste liquid recovery mechanism and an automatic liquid discharging mechanism, wherein the grinding wheel mechanism is installed on one side of the top of the machine tool, the guide wheel mechanism is installed on the other side of the top of the machine tool, the bearing mechanism is located between the grinding wheel mechanism and the guide wheel mechanism, the automatic liquid discharging mechanism is located above the bearing mechanism, and the waste liquid recovery mechanism is located below the bearing mechanism; the grinding wheel mechanism comprises a grinding wheel, a grinding wheel frame for supporting the grinding wheel and a first driving piece for driving the grinding wheel to rotate, the guide wheel mechanism comprises a guide wheel, a guide wheel frame for supporting the guide wheel, a second driving piece for driving the guide wheel to rotate and a sliding piece arranged at the bottom of the guide wheel frame, and the machine tool is provided with a sliding groove for the sliding piece to slide; the bearing mechanism comprises a bearing block, I-shaped pieces symmetrically arranged at the tops of the bearing block, and locking nuts symmetrically arranged in supporting plates inside the I-shaped pieces and used for fixing the supporting plates to the I-shaped pieces, fixing screw rods are symmetrically arranged on two sides of the bottom of the supporting plates, first screw holes for the fixing screw rods to penetrate through are symmetrically arranged on the I-shaped pieces, and the fixing screw rods are sleeved with the locking nuts.

Through lock nut spiro union in clamping screw, make the backup pad stably be fixed in I-shaped spare, during processing the crystal bar, rotate through first driving piece drive emery wheel, make the emery wheel grind the crystal bar, second driving piece drive guide pulley rotates simultaneously, makes guide pulley direction crystal bar rotate, and automatic lower liquid mechanism applies the polishing solution toward the crystal bar simultaneously in order to soak the crystal bar surface, improves the polishing process effect of crystal bar, and waste liquid collection mechanism retrieves the polishing waste liquid. Through the different inclination of adjustment backup pad, the interval between two adjustable backup pad opposite faces, the rethread slider slides in order to drive the guide pulley frame, makes the guide pulley keep away from the emery wheel or press close to the emery wheel, and then the interval of adjustment guide pulley and emery wheel to be applicable to the processing of the sapphire crystal bar of different diameters, with the practicality that improves centerless grinder.

Preferably, the automatic liquid discharging mechanism comprises a liquid storage tank, a liquid pumping pump communicated with the liquid storage tank, a liquid pumping pipe communicated with the liquid pumping pump, and a liquid outlet nozzle communicated with the liquid pumping pipe, wherein the liquid outlet nozzle is aligned with the bearing block.

When the polishing solution is discharged, the liquid pump is driven by the motor, the liquid pumping pipe transmits the polishing solution to the liquid outlet nozzle, the polishing solution is sprayed on the sapphire crystal bar on the bearing block through the liquid outlet nozzle, automatic discharging is further realized, manual cooperation operation is not needed in the process, and stable discharging is guaranteed.

Preferably, the waste liquid recovery mechanism includes collecting tank, first fluid-discharge tube, precipitation tank and second fluid-discharge tube, bear the mechanism set up in the diapire of collecting tank, first through-hole has been seted up to the bottom of collecting tank, the top of first fluid-discharge tube with first through-hole intercommunication, the bottom of first fluid-discharge tube is worn to stretch to the inside of precipitation tank, the second through-hole has been seted up to one side that first fluid-discharge tube was kept away from to the precipitation tank, the top of second fluid-discharge tube with second through-hole intercommunication, the bottom of second fluid-discharge tube is worn to stretch to the inside of reservoir.

Through first fluid-discharge tube with collecting tank and precipitation tank intercommunication, be favorable to collecting the waste liquid and deposit in the precipitation tank, rethread second fluid-discharge tube is with precipitation tank and reservoir intercommunication, makes the upper waste liquid after the sediment carry out recycle, and the bottom precipitate is then discharged, improves the utilization ratio of polishing solution.

Preferably, the sedimentation tank is provided with a filter screen corresponding to the second through hole.

Through installing the filter screen in the second through-hole, avoid the floater in the precipitation tank to get into the reservoir through the second through-hole inside, improve reuse's polishing solution quality.

Preferably, the waste liquid recovery mechanism further comprises a liquid exchange pipe, a liquid discharge hole communicated with the liquid exchange pipe is formed in the bottom of the precipitation tank, and a piston is arranged in the precipitation tank corresponding to the liquid discharge hole.

Through the outage that will trade liquid pipe intercommunication precipitation tank, be convenient for change the polishing solution, also can discharge the polishing impurity who deposits in the precipitation tank bottom simultaneously, the practicality is high.

Preferably, the lathe corresponds both ends the bearing piece symmetry is provided with the baffle, avoids the polishing solution to splash outside the lathe, just the baffle does not block the inclination of adjustment backup pad with bearing piece butt, and the practicality is high.

Preferably, the first driving part comprises a first driving motor, a first driving wheel and a first driving wheel, the first driving wheel is connected with an output shaft of the first driving motor, the first driving wheel drives the first driving wheel to rotate through a first driving belt, and the first driving wheel is coaxially connected with the grinding wheel.

Through the action of the driving force of the first driving motor, the first driving wheel drives the first driving wheel belt to rotate through the first driving belt, and the first driving wheel drives the grinding wheel to rotate, so that the rotation of the grinding wheel is realized, and the sapphire crystal bar is polished.

Preferably, the second driving part comprises a second driving motor, a second driving wheel and a second transmission wheel, the second driving wheel is connected with the second driving motor, the second driving wheel drives the second transmission wheel to rotate through a second transmission belt, and the second transmission wheel is connected with the guide wheel in a rotating manner.

Through the action of the driving force of the second driving motor, the second driving wheel drives the second driving wheel to rotate through the second driving belt, the second driving wheel drives the guide wheel to rotate, the rotation of the guide wheel is realized, the rotation of the sapphire crystal bar is driven, and the polishing processing of the rotating sapphire crystal bar is realized under the action of the grinding wheel.

Preferably, the guide wheel mechanism further comprises a screw rod, a fixing plate and a driving wheel, the fixing plate is fixed on one side, away from the grinding wheel, of the top of the machine tool, the guide wheel frame is provided with a second screw hole, the fixing plate is provided with a third screw hole, one end of the screw rod is connected with the driving wheel, and the other end of the screw rod penetrates through the second screw hole and the third screw hole.

The lead screw is rotated through the driving wheel, so that the lead screw drives the guide wheel frame to move along the length direction of the lead screw, the sliding part at the bottom of the guide wheel frame slides along the sliding groove, and the distance between the guide wheel and the grinding wheel is adjusted, so that the polishing machine is suitable for polishing sapphire crystal bars with different diameters.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the bottom of the supporting plate is arranged to be U-shaped, so that the bottom of the supporting plate can rotate in the I-shaped part conveniently, and the supporting plate can be screwed on the fixing screw rod through the locking nut to adjust the inclination angle of the supporting plate relative to the vertical plane; and the one side that the top of backup pad is close to another backup pad sets up a position inclined plane, and the inclination that the accessible was adjusted the backup pad adjusts the interval between the inclined plane that makes two backup pads to be applicable to the sapphire crystal bar that supports different diameters, improve centerless grinder's practicality.

2. The polishing solution is pumped by the liquid pump driven by the motor, the liquid pumping pipe transmits the polishing solution to the liquid outlet nozzle, and the polishing solution is sprayed on the sapphire crystal bar on the bearing block through the liquid outlet nozzle, so that automatic discharging is realized.

3. Through being provided with the liquid changing pipe, will deposit and discharge at the bottom polishing impurity of settling tank, be favorable to changing the polishing solution to guarantee polishing effect.

4. Through setting up lead screw, fixed plate and drive wheel for the length direction removal of guide wheel frame along the lead screw, and then make the slider of guide wheel frame bottom slide along the spout, with the interval between adjustment guide pulley and the emery wheel.

Drawings

Fig. 1 is a front partial cross-sectional view of a centerless grinder of the present application for machining sapphire crystals.

Fig. 2 is a schematic diagram of a back side structure of a centerless grinder for processing sapphire crystals according to the present application.

Fig. 3 is a schematic structural view of a portion a in fig. 1.

Fig. 4 is a schematic diagram of a structure of a support mechanism according to the present application.

Description of reference numerals:

1. a machine tool; 11. a chute; 12. a baffle plate; 21. a grinding wheel; 22. a grinding carriage; 231. a first drive motor; 232. a first drive wheel; 233. a first drive belt; 234. a first drive pulley; 31. a guide wheel; 32. a guide wheel frame; 321. a slider; 322. A second screw hole; 331. a second drive motor; 332. a second drive wheel; 333. a second belt; 334. a second transmission wheel; 34. a screw rod; 35. a fixing plate; 351. a third screw hole; 36. a driving wheel; 41. a bearing block; 42. a work piece; 421. A containing groove; 422. a first screw hole; 43. a support plate; 431. fixing the screw rod; 44. a locking nut; 51. a liquid storage tank; 511. a liquid pumping hole; 52. a liquid pump; 53. a liquid pumping pipe; 54. a liquid outlet nozzle; 61. a liquid collecting tank; 611. a first through hole; 62. a first drain pipe; 63. a filter screen; 64. a settling tank; 641. a second through hole; 642. a drain hole; 65. a second drain pipe; 66. a liquid changing pipe; 67. a piston plug.

Detailed Description

The present application is described in further detail below in conjunction with fig. 1-4.

The application discloses centerless grinder for processing sapphire crystal, refer to fig. 1 and 2, including lathe 11, set up in the grinding wheel mechanism of 11 top one sides of lathe, set up in the guide pulley mechanism of 11 top opposite sides of lathe, set up the bearing mechanism between grinding wheel mechanism and guide pulley mechanism, set up in 11 insides of lathe and correspond the waste liquid recovery mechanism of bearing mechanism below, set up in the automatic liquid mechanism down of bearing mechanism top.

The grinding wheel mechanism comprises a grinding wheel frame 22 fixed on one side of the top of the machine tool 11, a first driving motor 231 fixed on the grinding wheel frame 22, a first driving wheel 232 connected with an output shaft of the first driving motor 231, a first driving belt 233 sleeved on the first driving wheel 232, a first driving wheel 234 in transmission connection with the first driving belt 233, and a grinding wheel 21 coaxially connected with the first driving wheel 234, wherein the grinding wheel 21 is used for polishing and grinding the sapphire ingot. Specifically, the first driving wheel 232 is driven by the first driving motor 231 to rotate clockwise, and the first driving wheel 234 is driven to rotate clockwise by the action of the first driving belt 233, so that the grinding wheel 21 rotates clockwise.

The guide wheel mechanism comprises a guide wheel frame 32 fixed on the other side of the top of the machine tool 11, a second driving motor 331 fixed on the guide wheel frame 32, a second driving wheel 332 connected with an output shaft of the second driving motor 331, a second transmission belt 333 sleeved on the second driving wheel 332, a second transmission wheel 334 in transmission connection with the second transmission belt 333, and a guide wheel 31 coaxially connected with the second transmission wheel 334, wherein the guide wheel frame 32 is arranged corresponding to the grinding wheel frame 22, the guide wheel 31 is arranged corresponding to the grinding wheel 21, and the rotation of the guide wheel 31 drives the sapphire crystal bar to rotate so as to abut against the grinding wheel 21 for polishing. Specifically, the second driving wheel 332 is driven by the second driving motor 331 to rotate counterclockwise, and the second driving wheel 334 is driven to rotate counterclockwise by the action of the second driving belt 333, so that the guide wheel 31 rotates counterclockwise.

Further, a fixing plate 35 and a sliding groove 11 are arranged on one side, corresponding to the guide wheel frame 32, of the top of the machine tool 11, a third screw hole 351 is formed in the fixing plate 35, a second screw hole 322 is formed in one side, corresponding to the third screw hole 351, of the guide wheel frame 32, the side, away from the guide wheel 31, of the guide wheel frame 32, a plurality of sliding parts 321 which are connected to the sliding groove 11 in a sliding mode are arranged at intervals at the bottom of the guide wheel frame 32, the sliding parts 321 are preferably sliding wheels, a guide wheel mechanism is provided with a lead screw 34, one end of the lead screw 34 penetrates through the third screw hole 351 and the second screw hole 322 in sequence, the end of the lead screw is fixedly connected with the guide wheel frame 32, and a driving wheel 36 is fixedly connected to the other end of the lead screw 34.

When the transmission wheel 36 is rotated clockwise, the screw rod 34 is driven to rotate clockwise, the screw rod 34 is in threaded connection with the third screw hole 351 and the second screw hole 322, and the second screw hole 322 slides relative to the screw rod 34, so that the screw rod 34 drives the guide wheel frame 32 fixedly connected with the screw rod 34 to move along the length direction of the screw rod 34, at the moment, the sliding part 321 moves along the sliding groove 11 in the direction close to the grinding wheel frame 22, the guide wheel 31 is close to the grinding wheel 21, the distance between the guide wheel 31 and the grinding wheel 21 is further shortened, and the sapphire crystal bar processing machine is suitable for processing a sapphire crystal bar with a smaller diameter; when the transmission wheel 36 rotates counterclockwise, the lead screw 34 is driven to rotate counterclockwise and the wheel carrier 32 is driven to move along the length direction of the lead screw 34, at this time, the sliding part 321 moves along the direction that the sliding groove 11 is far away from the grinding wheel carrier 22, so that the guide wheel 31 is far away from the grinding wheel 21, and further, the distance between the guide wheel 31 and the grinding wheel 21 is increased, thereby being suitable for processing the sapphire crystal bar with larger diameter.

Referring to fig. 1 and 2, the automatic liquid discharging mechanism includes a liquid storage tank 51 disposed inside the machine tool 11, a liquid pumping pipe 53 communicated with the liquid storage tank 51, a liquid pumping pump 52 communicated with the liquid pumping pipe 53, and a liquid outlet nozzle 54 communicated with a liquid outlet end of the liquid pumping pipe 53, one end of the liquid pumping pipe 53 is fixed on the top of the grinding wheel frame 22, and the liquid outlet nozzle 54 is suspended between the grinding wheel 21 and the guide wheel 31. Preferably, the baffle 12 is symmetrically arranged at the top of the machine tool 11 below the liquid outlet nozzle 54 to prevent the polishing liquid from splashing out of the machine tool 11.

Referring to fig. 3, the waste liquid collecting mechanism includes a liquid collecting tank 61, a first liquid discharging pipe 62, a settling tank 64, a second liquid discharging pipe 65 and a liquid exchanging pipe 66, the liquid collecting tank 61 is surrounded around the supporting mechanism to collect the waste liquid of the polishing liquid, the bottom of the liquid collecting tank 61 is provided with a first through hole 611, the top end of the first liquid discharging pipe 62 is embedded in the first through hole 611 and is communicated with the first through hole 611, the bottom end of the first liquid discharging pipe 62 is embedded in the settling tank 64 to communicate the liquid collecting tank 61 with the settling tank 64, the waste polishing liquid collected by the liquid collecting tank 61 flows into the settling tank 64 to deposit impurities, one side of the settling tank 64 far away from the first liquid discharging pipe 62 is provided with a second through hole 641, the top end of the second liquid discharging pipe 65 is embedded in the second through hole 641 and is communicated with the second through hole 641, the bottom end of the second through hole 641 is embedded in the liquid storage tank 51, and the second through hole 641 is opened at the upper middle section of the side wall of the settling tank 64, so as to make the supernatant in the settling tank 64 flow into the liquid storage tank 51, which facilitates the recycling of the waste polishing liquid by the liquid pump 52, the liquid suction pipe 53 and the liquid outlet nozzle 54, preferably, a filter screen 63 is disposed at the position of the settling tank 64 corresponding to the second through hole 641 to prevent possible floating matters in the supernatant in the settling tank 64 from entering the liquid storage tank 51.

Preferably, the tap plug 67 is electrically or manually controlled to open the tap plug 67 by electrical control or manually open the tap plug 67 when the sediment is discharged or the polishing solution is changed from the settling tank 64, so that the polishing solution or the sediment deposited at the bottom of the settling tank 64 is discharged through the liquid change pipe 66. The bottom wall of the settling tank 64 is inclined, specifically, inclined downward from the second through hole 641 to the drain hole 642, so that the bottom of the settling tank 64 is funnel-shaped, and the sediment deposited at the bottom of the settling tank 64 flows into the drain hole 642 in an inclined manner and is drained through the drain hole 642.

Referring to fig. 1 and 4, the bearing mechanism includes bearing block 41 and two sets of bearing units symmetrically arranged at two ends of bearing block 41, bearing block 41 is arranged at the bottom of liquid collecting tank 61, grinding wheel 21 and guide wheel 31 are arranged above bearing block 41, and are arranged between two sets of bearing units, each set of bearing unit includes I-shaped piece 42 arranged at the top of bearing block 41, two supporting plates 43 connected with I-shaped piece 42 in a rotating manner, two sets of locking nuts 44 for locking two supporting plates 43, two accommodating grooves 421 are arranged symmetrically for I-shaped piece 42, first screw holes 422 are arranged symmetrically for two ends of I-shaped piece 42 corresponding to accommodating groove 421, fixing screw rod 431 penetrating through first screw holes 422 are arranged at two ends of each supporting plate 43, and outer ends of locking nuts 44 and fixing screw rods 431 are screwed. Specifically, in one holding unit, one surface of the top of the support plate 43 close to the other support plate 43 is provided with an inclined surface, so that the sapphire ingot is accommodated between the inclined surfaces of the two support plates 43, and the bottom of the support plate 43 is provided with a U-shape, which facilitates the rotation of the bottom of the support plate 43.

When a crystal bar with a larger diameter is processed, the locking nut 44 is unscrewed, so that the angle of the two supporting plates 43 which are far away from each other is adjusted to be abutted against the I-shaped part 42, the distance between the inclined surfaces of the two supporting plates 43 is increased, and then the locking nut 44 is screwed down, so that the crystal bar with the larger diameter can pass through conveniently; when a crystal bar with a small diameter is processed, the locking nut 44 is loosened, so that the angle of the two support plates 43 which are close to each other is adjusted to abut against the I-shaped member 42, the distance between the inclined surfaces of the two support plates 43 is increased, and then the locking nut 44 is tightened, so that the crystal bar with a small diameter can pass through conveniently. Specifically, the distance between the inclined surfaces of the support plates 43 in each set of the holder units corresponds to the distance between the grinding wheel 21 and the guide wheel 31, and the grinding wheel 21 and the guide wheel 31 are not abutted against the support plates 43; when the sapphire crystal bar is placed on the bearing mechanism, the crystal bar penetrates through the space between the inclined surfaces of the two supporting plates 43 of one bearing unit, the two end parts of the crystal bar are supported on the two groups of bearing units, and the middle part of the crystal bar is placed at the space between the guide wheel 31 and the grinding wheel 21 for processing; through adding another crystal bar, the tip of another crystal bar and the tip butt of last crystal bar impel last crystal bar toward the bearing unit of the other end to from the bearing unit ejection of compact of the other end, then another crystal bar of adding enters into the interval between guide pulley 31 and emery wheel 21, carries out the polishing of next group crystal bar, and then accomplishes the continuous processing of multiunit sapphire crystal bar.

The centerless grinder for processing sapphire crystals in the embodiment is implemented according to the following principle: firstly, loosening the locking nut 44, adjusting the inclination angle of the supporting plate 43 through the diameter of the crystal bar to be processed, and then, tightening the locking nut 44 to fix the supporting plate 43; and then the driving wheel 36 is rotated, so that the lead screw 34 drives the guide wheel frame 32 to move, the sliding part 321 slides in the chute 11, and the distance between the grinding wheel 21 and the guide wheel 31 is adjusted to be equal to or slightly smaller than the diameter of the crystal bar, so as to process the crystal bar.

Specifically, the crystal bar passes through the interval between the inclined planes of the two supporting plates 43, and horizontally enters the interval between the grinding wheel 21 and the guide wheel 31, at this time, the first driving wheel 232 is driven to rotate by the first driving motor 231, so as to drive the first driving wheel 234 and the grinding wheel 21 to rotate along the counterclockwise direction and grind the crystal bar, meanwhile, the second driving wheel 332 is driven to rotate by the second driving motor 331, so as to drive the second driving wheel 334 and the guide wheel 31 to rotate along the clockwise direction, so that the guide wheel 31 guides and rotates the crystal bar to rotate along the clockwise direction, so that the grinding wheel 21 can grind and polish the crystal bar in multiple directions.

When a plurality of sapphire crystal bars are polished continuously, the next crystal bar penetrates through the space between the inclined planes of the two supporting plates 43 in the group of supporting units, the next crystal bar is abutted against the previous crystal bar and pushes the previous crystal bar to move, the processed crystal bar is discharged from the other group of supporting units and is collected, the crystal bar is processed, the distance between the supporting plates 43 can be adjusted according to the diameter of the crystal bar in the process so as to be suitable for supporting the crystal bars with different diameters, the screw rod 34 can be driven to rotate by rotating the driving wheel 36, the guide wheel frame 32 is driven to move close to or far away from the grinding wheel frame 22 along the length direction of the screw rod 34, the space between the guide wheel 31 and the grinding wheel 21 is adjusted, the grinding machine is further suitable for processing the crystal bars with different diameters, and therefore the practicability of the centerless grinding machine is improved.

In the whole polishing process, the motor drives the liquid pump 52 to pump the polishing liquid in the liquid storage tank 51, the liquid pumping pipe 53 conveys the polishing liquid to the liquid outlet spray head 54, the polishing liquid is sprayed from the liquid outlet spray head 54 to be sprayed on the surface of the crystal bar, the polishing liquid is soaked through the crystal bar, the crystal bar is convenient to process, the liquid collection tank 61 collects the polishing liquid waste liquid flowing out of the bearing mechanism for bearing the crystal bar, the waste liquid enters the precipitation tank 64 through the first through hole 611 of the liquid collection tank 61 for standing and precipitation, when the precipitated supernatant liquid flows through the second through hole 641 through the filter screen 63 and enters the liquid storage tank 51, the recycling of the waste liquid is completed, and the sediment in the polishing liquid waste liquid is precipitated at the bottom of the precipitation tank 64 and can be discharged through the liquid exchange pipe 66.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A centerless grinder for processing sapphire crystals comprises a machine tool (1), a grinding wheel mechanism, a guide wheel mechanism, a bearing mechanism, a waste liquid recovery mechanism and an automatic liquid discharging mechanism, wherein the grinding wheel mechanism and the guide wheel mechanism are mounted at the top of the machine tool (1), the bearing mechanism is positioned between the grinding wheel mechanism and the guide wheel mechanism, the automatic liquid discharging mechanism is positioned above the bearing mechanism, and the waste liquid recovery mechanism is positioned below the bearing mechanism; grinding wheel mechanism includes emery wheel (21), supports emery wheel frame (22) and the first driving piece of drive emery wheel (21) pivoted of emery wheel (21), guide wheel mechanism includes guide pulley (31), supports guide pulley frame (32), the drive guide pulley (31) pivoted second driving piece of guide pulley (31) and set up in slider (321) of guide pulley frame (32) bottom, lathe (1) is provided with the confession slider (321) gliding spout (11), its characterized in that: the bearing mechanism comprises a bearing block (41), an I-shaped piece (42) symmetrically arranged at the top of the bearing block (41), a support plate (43) symmetrically arranged inside the I-shaped piece (42) and a locking nut (44) used for fixing the support plate (43) on the I-shaped piece (42), fixing screw rods (431) are symmetrically arranged on two sides of the bottom of the support plate (43), the I-shaped piece (42) is symmetrically provided with first screw holes (422) for the fixing screw rods (431) to penetrate through, and the fixing screw rods (431) are sleeved with the locking nut (44).

2. A centerless grinder for processing a sapphire crystal as defined in claim 1, wherein: the automatic liquid discharging mechanism comprises a liquid storage tank (51), a liquid pumping pump (52) communicated with the liquid storage tank (51), a liquid pumping pipe (53) communicated with the liquid pumping pump (52), and a liquid outlet spray head (54) communicated with the liquid pumping pipe (53), wherein the liquid outlet spray head (54) is aligned with the bearing block (41).

3. A centerless grinder for processing a sapphire crystal as defined in claim 2, wherein: the waste liquid recovery mechanism comprises a liquid collecting tank (61), a first liquid discharging pipe (62), a settling tank (64) and a second liquid discharging pipe (65), the bearing block (41) is arranged on the bottom wall of the liquid collecting tank (61), a first through hole (611) is formed in the bottom of the liquid collecting tank (61), the top end of the first liquid discharging pipe (62) is communicated with the first through hole (611), the bottom end of the first liquid discharging pipe (62) extends to the inside of the settling tank (64), a second through hole (641) is formed in one side, away from the first liquid discharging pipe (62), of the settling tank (64), the top end of the second liquid discharging pipe (65) is communicated with the second through hole (641), and the bottom end of the second liquid discharging pipe (65) extends to the inside of the liquid storage tank (51).

4. A centerless grinder for processing a sapphire crystal as defined in claim 3, wherein: the sedimentation tank (64) is provided with a filter screen (63) corresponding to the second through hole (641).

5. A centerless grinder for processing a sapphire crystal as defined in claim 3, wherein: the waste liquid recovery mechanism further comprises a liquid changing pipe (66), a liquid discharging hole (642) communicated with the liquid changing pipe (66) is formed in the bottom of the settling tank (64), and a piston plug (67) is arranged on the settling tank (64) corresponding to the liquid discharging hole (642).

6. A centerless grinder for processing a sapphire crystal as defined in claim 1, wherein: the machine tool (1) is symmetrically provided with baffle plates (12) corresponding to the bearing blocks (41) at the two ends.

7. A centerless grinder for processing a sapphire crystal as defined in claim 1, wherein: first driving piece includes first driving motor (231), first drive wheel (232) and first drive wheel (234), first drive wheel (232) and the output shaft of first driving motor (231), first drive wheel (232) drive through first drive belt (233) first drive wheel (234) rotate, first drive wheel (234) with emery wheel (21) coaxial coupling.

8. A centerless grinder for processing a sapphire crystal as defined in claim 1, wherein: the second driving piece comprises a second driving motor (331), a second driving wheel (332) and a second transmission wheel (334), the second driving wheel (332) is connected with an output shaft of the second driving motor (331), the second driving wheel (332) drives the second transmission wheel (334) to rotate through a second transmission belt (333), and the second transmission wheel (334) is coaxially connected with the guide wheel (31).

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