A method and device for online dressing of end face grinding wheel abrasive water jet

Abstract

The invention provides an end face grinding wheel abrasive water jet online dressing method and device, which relate to the technical field of grinding processing. The online dressing method is as follows: S10 sets the required grinding wheel according to the workpiece processing requirements and installs the grinding wheel; S20 selects the corresponding jet abrasive according to the installed grinding wheel, and then adjusts the jet pressure, jet target distance, jet abrasive flow rate, abrasive jet spray inclination angle, jet beam diameter and horizontal translation speed of the nozzle that sprays the abrasive jet; the invention is suitable for in-situ online dressing of the grinding wheel when the end face grinding wheel is grinding a small plane, which is beneficial to improving the grinding accuracy and reducing the burn of the workpiece; at the same time, by adjusting the jet parameters, the grinding wheels with different hardness, particle size, rotation speed and bonding agent can be dressed, which has a wide application prospect; and the abrasive jet has a cooling effect to a certain extent, which further reduces the grinding temperature.

Description

Technical Field

[0001] The invention relates to the technical field of grinding processing, and in particular to an end face grinding wheel abrasive water jet online dressing method and device. Background Art

[0002] With the development of today's manufacturing industry, the requirements for grinding process quality are getting higher and higher. During grinding, if the tip of the abrasive grain cannot fall off in time after being worn, the grinding ability of the grinding wheel will decrease, and the chip groove of the grinding wheel will be more easily blocked, thereby increasing the grinding temperature and causing the workpiece to burn or even break, resulting in a waste of materials and resources. Therefore, it is very necessary to dress the grinding wheel in a timely and appropriate manner.

[0003] There are currently three main methods for dressing grinding wheels: diamond pen dressing, electrolytic dressing, laser dressing, and electric spark dressing. Diamond pen dressing is the most widely used, but its dressing accuracy is difficult to guarantee. Electrolytic dressing is suitable for iron-based bonded grinding wheels, and has certain requirements on the type of bond, especially its conductivity. Laser and electric spark dressing have a wide range of applications, but they tend to burn abrasive particles and are relatively expensive.

[0004] Patent number CN107756252A provides a method based on the principle of liquid dynamic pressure, in which dressing abrasive is mixed into the fluid, and the dull grinding wheel is dressed by the rotation of the grinding wheel. Although it has high dressing efficiency and low cost, it cannot achieve in-situ online dressing. Errors will occur when judging whether the grinding wheel is blunt and reinstalling the grinding wheel, affecting the processing accuracy. German patent DE4334391 combines ultrasonic dressing with liquid jet dressing, and transports the contact fluid to the grinding surface at high speed through ultrasonic oscillation, so that the shape and accuracy of the grinding wheel can be maintained. Although in-situ online dressing can be achieved, it is only for cylindrical grinding wheels and cannot be applied to end grinding wheels. Compared with cylindrical grinding wheels, end grinding wheels have large grinding forces, high grinding temperatures, and poor heat dissipation conditions. Effective online dressing methods are urgently needed to keep the grinding performance of the grinding wheel stable, which is conducive to improving the quality of surface grinding. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an end face grinding wheel abrasive water jet online dressing method and device, which utilizes a high-pressure abrasive water jet to erode the non-working area exposed when the end face grinding wheel grinds a small planar workpiece, adjusts the jet parameters and cooperates with the horizontal movement of the nozzle to achieve uniform removal of the binder of grinding wheels with different hardnesses, so that the abrasive grains on the surface of the grinding wheel maintain a good blade height and distribution state during grinding. At the same time, the jet can remove grinding chips, prevent the grinding wheel from being blocked, and play a cooling role, thereby obtaining a lower grinding surface roughness while reducing the possibility of workpiece burning.

[0006] In order to achieve the above purpose, a technical solution adopted by the present invention is:

[0007] An end face grinding wheel abrasive water jet online dressing method, the online dressing method is as follows:

[0008] S10 sets the required grinding wheel according to the workpiece processing requirements and installs the grinding wheel;

[0009] S20 selects a corresponding jet abrasive according to the installed grinding wheel, and then adjusts the jet pressure, jet target distance, jet abrasive flow rate, abrasive jet spraying inclination angle, jet beam diameter, and horizontal translation speed of the nozzle spraying the abrasive jet;

[0010] S30 abrasive and water are mixed into jet abrasive through a mixing agitator, and high-pressure water is formed by a gas-liquid booster pump and an accumulator. The two are mixed into an abrasive water jet in the mixing chamber in the nozzle, and finally ejected from the end outlet of the sand pipe in the nozzle.

[0011] Furthermore, the particle size of the jet abrasive is consistent with the particle size of the grinding wheel.

[0012] Furthermore, the abrasive jet parameters include jet pressure of 30-50 MPa, jet target distance of 10-20 cm, abrasive flow rate of 10-20 g / min, nozzle inclination angle of 30-60°, jet beam diameter of 0.6-1.1 mm, and nozzle horizontal translation speed of 1-20 mm / s.

[0013] The online dressing device of the end face grinding wheel abrasive water jet online dressing method is characterized by comprising a machine base, a grinding wheel grinding device and a nozzle;

[0014] The machine base also includes an electromagnetic chuck, a workpiece, a water outlet pipe, a drainage chute and a column. The electromagnetic chuck is fixedly connected in the top groove of the machine base, the workpiece is magnetically fixed on the top of the electromagnetic chuck, a drainage chute is opened on the inner top of the machine base, the machine base is fixedly connected with a water outlet pipe at the bottom of the drainage chute, and the column is fixedly installed on the right side wall of the machine base;

[0015] The grinding wheel grinding device is fixedly installed in the machine base;

[0016] The abrasive water jet dressing device is fixedly mounted on a column, and the nozzle is fixedly mounted on the abrasive water jet dressing device.

[0017] Furthermore, the grinding wheel grinding device includes a first motor, a first driving wheel, a first driven wheel, a first screw, a pin, a first belt, a sleeve, a rolling bearing, a top cover, a cantilever, a second motor, a spindle, a flange, an end grinding wheel, a grinding wheel guard, a second driving wheel, a second driven wheel and a U-shaped slide, wherein the U-shaped slide is fixedly installed on the rear top of the machine base, the bottom of the rear side wall of the U-shaped slide is fixedly connected to the first motor, the output end of the first motor is fixedly connected to the first driving wheel, the first driving wheel is movably connected to the first belt, the top of the U-shaped slide is fixedly connected to the top cover, the inner top of the top cover, the bottom of the U-shaped slide and the outer end of the cantilever are fixedly connected to the rolling bearing, and the inner ring of the rolling bearing is fixedly connected to the first A screw, a sleeve is fixedly connected to the lower side of the first screw, a first driven wheel is fixedly connected to the top of the sleeve, the first driven wheel is movably connected to the first belt, the first screw is threadedly connected to a cantilever, a second motor is fixedly installed in a straight hole opened at the inner end of the top of the cantilever, the output end of the second motor is fixedly connected to a second driving wheel, the second driving wheel is movably connected to the second driven wheel through the first belt, a main shaft is fixedly installed in the straight hole of the second driven wheel, a flange is inserted at the bottom of the main shaft, the flange and the main shaft are both inserted with pins, and the pins are in a locked state, an end grinding wheel is fixedly connected to the bottom of the flange, a grinding wheel guard is fixedly connected to the bottom of the outer end of the cantilever, and the end grinding wheel rotates in the grinding wheel guard.

[0018] Furthermore, the side wall of the cantilever is slidably connected to the inner wall of the U-shaped slide groove, and the main shaft is rotationally connected to the cantilever via a rolling bearing.

[0019] Furthermore, the abrasive water jet dressing device includes a horizontal guide groove, a fourth driven wheel, a traction belt, a third motor, a third driving wheel, a third driven wheel, a nozzle seat, a nozzle bracket, a steering gear, a steering gear guard plate, a second lead screw, a guide light rod, a fourth motor and a second belt. The outer wall of the column is fixedly mounted with a fourth motor, the output end of the fourth motor is fixedly connected with a fourth driving wheel, the fourth driving wheel is movably connected with a second belt, the second belt is movably connected with a fourth driven wheel, the fourth driven wheel is fixedly connected with a second lead screw, the second lead screw is threadedly connected with the horizontal guide groove, and the horizontal The guide groove is slidably connected to the guide light rod through a sliding hole, the inner end of the horizontal guide groove is fixedly installed with a third motor, the output end of the third motor is fixedly connected with a third driving wheel, the outer end of the horizontal guide groove is rotatably connected with a third driven wheel through a fixedly connected bearing, the third driven wheel and the third driving wheel are movably connected to the traction belt, the inner end of the traction belt is fixedly installed on both sides of the nozzle seat, the rear side wall of the nozzle seat is fixed with a steering gear and a steering gear guard plate, and the steering gear guard plate is arranged on the steering gear, the output end of the steering gear is fixedly connected with a nozzle bracket, and the rotating shaft of the steering gear rotates in the straight hole of the nozzle seat.

[0020] Furthermore, the upper and lower ends of the guide light rod are fixedly installed in the straight hole of the column, and the second lead screw is rotatably connected to the column through a fixedly connected bearing.

[0021] Furthermore, the nozzle includes a nozzle base, a gem nozzle, an abrasive inlet pipe, a sand pipe, a first sealing ring, a second sealing ring, a high-pressure water inlet pipe and a mixing chamber. A sand pipe is fixedly installed in the top straight hole of the nozzle base, a second sealing ring is connected between the sand pipe and the nozzle base, a mixing chamber is opened at the middle end of the nozzle base, the nozzle base is fixedly connected to the abrasive inlet pipe on the side wall of the mixing chamber, a first sealing ring is connected between the abrasive inlet pipe and the nozzle base, the nozzle base is fixedly connected to the gem nozzle at the bottom of the mixing chamber, and the nozzle base is fixedly connected to the high-pressure water inlet pipe at the bottom of the gem nozzle.

[0022] Furthermore, the nozzle base is fixedly installed in the nozzle bracket.

[0023] The above technical solution of the present invention has the following advantages compared with the prior art:

[0024] The present invention is suitable for in-situ online dressing of the grinding wheel when the end grinding wheel is grinding a small plane, which is beneficial to improving the grinding accuracy and reducing the burn of the workpiece; at the same time, by adjusting the jet parameters, the grinding wheels with different hardness, particle size, rotation speed and bonding agent can be dressed, and it has a wide application prospect; and the abrasive jet has a cooling effect to a certain extent, further reducing the grinding temperature; finally, the device is convenient for the recovery of dressing waste liquid, which is beneficial to environmental protection and resource conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The technical solutions and beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0026] Figure 1 It is a structural schematic diagram of the end face grinding wheel abrasive water jet online dressing device of the present invention.

[0027] Figure 2 It is a schematic structural diagram of the abrasive water jet dressing device of the present invention.

[0028] Figure 3 It is a cross-sectional view of the abrasive water jet dressing device of the present invention.

[0029] Figure 4 It is a cross-sectional view of the nozzle structure of the present invention.

[0030] Figure 5 It is a cross-sectional view of the grinding wheel grinding structure of the present invention.

[0031] Figure 6 It is a flow chart of abrasive jet formation of the present invention.

[0032] Reference numerals in the figures:

[0033] 1. Machine base 11. Electromagnetic chuck 12. Workpiece 13. Water outlet pipe 14. Drainage chute 15. Column 2. Grinding wheel grinding device 21. First motor 22. First driving wheel 23. First driven wheel 24. First lead screw 25. Pin 26. First belt 27. Sleeve 28. Rolling bearing 29. Top cover 210. Cantilever 211. Second motor 212. Spindle 213. Flange 214. End grinding wheel 215. Grinding wheel guard 216. Second driving wheel 217. Second driven wheel 218. U-shaped slide 3. Spray head 31. Spray Head base 32. Gem nozzle 33. Abrasive inlet pipe 34. Sand pipe 35. First sealing ring 36. Second sealing ring 37. High-pressure water inlet pipe 38. Mixing chamber 4. Abrasive water jet finishing device 41. Horizontal guide groove 42. Fourth driven wheel 43. Traction belt 44. Third motor 45. Third driving wheel 46. Third driven wheel 47. Nozzle seat 48. Nozzle bracket 49. Servo 410. Servo guard plate 411. Second lead screw 412. Guide light rod 413. Fourth motor 414. Fourth driving wheel 415. Second belt. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0035] The present invention will be further described below in conjunction with the embodiments.

[0036] Embodiment 1

[0037] like Figure 6 As shown, in order to achieve the above purpose, a technical solution adopted by the present invention is:

[0038] An end face grinding wheel abrasive water jet online dressing method, the online dressing method is as follows:

[0039] S10 sets the required grinding wheel according to the workpiece processing requirements and installs the grinding wheel;

[0040] S20 selects the corresponding jet abrasive according to the installed grinding wheel, and then adjusts the jet pressure, jet target distance, jet abrasive flow rate, abrasive jet jet inclination angle, jet beam diameter and horizontal translation speed of the nozzle that sprays the abrasive jet. The abrasive jet parameters include jet pressure of 30-50MPa, jet target distance of 10-20cm, abrasive flow rate of 10-20g / min, nozzle inclination angle of 30-60°, jet beam diameter of 0.6-1.1mm, and horizontal translation speed of the nozzle of 1-20mm / s;

[0041] S30 abrasive and water are mixed into jet abrasive through a mixing agitator, and high-pressure water is formed by using a gas-liquid booster pump and an accumulator. The two are mixed into an abrasive water jet in the mixing chamber in the nozzle, and finally ejected from the end outlet of the sand pipe in the nozzle. The formation process of the abrasive jet is as follows: Figure 6 As shown, abrasive and water are mixed into slurry through a mixing agitator, and high-pressure water is formed using a gas-liquid booster pump and an accumulator. The two are mixed into an abrasive water jet in a mixing chamber in the nozzle and finally ejected through an outlet.

[0042] Embodiment 2

[0043] like Figure 1-5 As shown, the online dressing device of the end face grinding wheel abrasive water jet online dressing method is characterized by comprising a machine base 1, a grinding wheel grinding device 2 and a nozzle 3;

[0044] The machine base 1 further includes an electromagnetic chuck 11, a workpiece 12, a water outlet pipe 13, a drainage chute 14 and a column 15. The electromagnetic chuck 11 is fixedly connected in the groove at the top of the machine base 1, the workpiece 12 is magnetically fixed on the top of the electromagnetic chuck 11, the drainage chute 14 is opened on the inner top of the machine base 1, the machine base 1 is fixedly connected with the water outlet pipe 13 at the bottom of the drainage chute 14, and the column 15 is fixedly installed on the right side wall of the machine base 1, which is convenient for the recovery of the trimming waste liquid, and is beneficial to environmental protection and resource conservation;

[0045] The grinding wheel grinding device 2 is fixedly installed in the machine base 1, and the grinding wheel grinding device 2 includes a first motor 21, a first driving wheel 22, a first driven wheel 23, a first screw 24, a pin 25, a first belt 26, a sleeve 27, a rolling bearing 28, a top cover 29, a cantilever 210, a second motor 211, a spindle 212, a flange 213, an end grinding wheel 214, a grinding wheel guard 215, a second driving wheel 216, a second driven wheel 217 and a U-shaped slide 218. The U-shaped slide 218 is fixedly installed on the rear top of the machine base 1, and the rear side wall bottom of the U-shaped slide 218 is fixed. The first motor 21 is connected to the first driving wheel 22, the output end of the first motor 21 is fixedly connected to the first driving wheel 22, the first driving wheel 22 is movably connected to the first belt 26, the top of the U-shaped slide 218 is fixedly connected to the top cover 29, the inner top of the top cover 29, the bottom of the U-shaped slide 218 and the outer end of the cantilever 210 are fixedly connected to the rolling bearing 28, the inner ring of the rolling bearing 28 is fixedly connected to the first lead screw 24, the lower side of the first lead screw 24 is fixedly connected to the sleeve 27, the top of the sleeve 27 is fixedly connected to the first driven wheel 23, and the first driven wheel 23 is movably connected to the first belt 26. The first lead screw 24 is threadedly connected with the cantilever 210, and the second motor 211 is fixedly installed in the straight hole opened at the top inner end of the cantilever 210. The output end of the second motor 211 is fixedly connected with the second driving wheel 216, and the second driving wheel 216 is movably connected with the second driven wheel 217 through the first belt 26. The straight hole of the second driven wheel 217 is fixedly installed with the main shaft 212, and the bottom of the main shaft 212 is plugged with a flange 213. The flange 213 and the main shaft 212 are both plugged with a pin 25, and the pin 25 is in a locked state. The bottom of the flange 213 is fixedly connected An end face grinding wheel 214 is connected, a grinding wheel guard 215 is fixedly connected to the bottom of the outer end of the cantilever 210, and the end face grinding wheel 214 rotates in the grinding wheel guard 215, and the grinding wheel guard 215 can prevent the jet liquid from splashing. The side wall of the cantilever 210 is slidably connected with the inner wall of the U-shaped slide 218, and the main shaft 212 is rotatably connected to the cantilever 210 through the rolling bearing 28. The first motor 21 drives the first lead screw 24 to rotate, so that the cantilever 210 and the end face grinding wheel 214 move in the vertical direction, so that the bottom of the end face grinding wheel 214 is suitable for processing workpieces of different heights;

[0046] The abrasive water jet dressing device 4 is fixedly installed on the column 15, and the abrasive water jet dressing device 4 includes a horizontal guide groove 41, a fourth driven wheel 42, a traction belt 43, a third motor 44, a third driving wheel 45, a third driven wheel 46, a nozzle seat 47, a nozzle bracket 48, a steering gear 49, a steering gear guard plate 410, a second lead screw 411, a guide light rod 412, a fourth motor 413 and a second belt 415. The outer wall of the column 15 is fixedly installed with a fourth motor 413, and the output end of the fourth motor 413 is fixedly connected to the fourth driving wheel 414. The fourth driving wheel 414 is movably connected to the second belt 415, the second belt 415 is movably connected to the fourth driven wheel 42, the fourth driven wheel 42 is fixedly connected to the second lead screw 411, the second lead screw 411 is threadedly connected to the horizontal guide groove 41, the horizontal guide groove 41 is slidably connected to the guide light rod 412 through a sliding hole, the fourth motor 413 drives the second lead screw 411 to rotate through the fourth driving wheel 414, so that the horizontal guide groove 41 moves in the guide groove of the column 15 along the vertical direction to adapt to the position change of the grinding wheel in the vertical direction; the horizontal guide groove 41 A third motor 44 is fixedly installed at the inner end, and a third driving wheel 45 is fixedly connected to the output end of the third motor 44. The outer end of the horizontal guide groove 41 is rotatably connected to a third driven wheel 46 through a fixedly connected bearing. The third driven wheel 46 and the third driving wheel 45 are both movably connected to the traction belt 43. The inner end of the traction belt 43 is fixedly installed on both sides of the nozzle seat 47. The third motor 44 drives the traction belt 43 through the third driving wheel 45 to make the nozzle seat 47 reciprocate in the horizontal direction on the horizontal guide groove 41, thereby driving the nozzle 3 to move left and right, and the nozzle seat 4 The rear side wall of 7 is fixed with a steering gear 49 and a steering gear guard plate 410, and the steering gear guard plate 410 is arranged on the steering gear 49, the output end of the steering gear 49 is fixedly connected with the nozzle bracket 48, and the rotating shaft of the steering gear 49 rotates in the straight hole of the nozzle seat 47, the upper and lower ends of the guide light rod 412 are fixedly installed in the straight hole of the column 15, the second lead screw 411 is rotatably connected with the column 15 through a fixedly connected bearing, the steering gear 49 drives the nozzle bracket 48 to rotate, and the nozzle bracket 48 drives the nozzle 3 to rotate, so as to realize the spraying angle adjustment of the nozzle 3 and the multi-dimensional adjustment of the spraying parameters of the nozzle 3;

[0047] The nozzle 3 is fixedly mounted on the abrasive water jet dressing device 4. The nozzle 3 includes a nozzle base 31, a gem nozzle 32, an abrasive inlet pipe 33, a sand pipe 34, a first sealing ring 35, a second sealing ring 36, a high-pressure water inlet pipe 37 and a mixing chamber 38. The sand pipe 34 is fixedly mounted in the top straight hole of the nozzle base 31. The second sealing ring 36 is connected between the sand pipe 34 and the nozzle base 31. A mixing chamber 38 is opened at the middle end of the nozzle base 31. The nozzle base 31 is in the mixing chamber. An abrasive inlet pipe 33 is fixedly connected to the side wall of the cavity 38, a first sealing ring 35 is connected between the abrasive inlet pipe 33 and the nozzle base 31, the nozzle base 31 is fixedly connected to a gem nozzle 32 at the bottom of the mixing cavity 38, the nozzle base 31 is fixedly connected to a high-pressure water inlet pipe 37 at the bottom of the gem nozzle 32, the nozzle base 31 is fixedly installed in the nozzle bracket 48, and the abrasive jet ejected from the sand tube 34 has a cooling effect to a certain extent, further reducing the grinding temperature.

[0048] Specific examples

[0049] A diamond grinding wheel with a particle size of 120# and a bronze bond hardness of T grade was selected, with an end face diameter of 250mm and an inner hole diameter of 70mm. The 316L stainless steel rectangular workpiece was ground with a size of 60mm×40mm×50mm (length×width×height). The grinding wheel speed was 1400r / min and the grinding depth was 20μm.

[0050] First, install the grinding wheel and clamp the workpiece. Adjust the nozzle to point to the grinding wheel and make the angle between it and the horizontal direction 45°. At the same time, the outlet of the sand pipe is 10mm away from the end face of the grinding wheel. Set the nozzle seat to reciprocate within the effective dressing range and the movement speed is 10mm / s. It is expected that the jet can evenly erode the end face of the grinding wheel.

[0051] Secondly, according to the particle size of the grinding wheel, SiC abrasive with a particle size of 120# is selected as the jet abrasive. An appropriate amount of SiC abrasive and water are added to the agitator to form an abrasive slurry with a certain fluidity, and then transported to the nozzle through a hose. Turn on the air compressor and water pump, and form high-pressure water through the gas-liquid booster pump and the accumulator. The high-pressure water is transported to the nozzle through a high-pressure hose, and forms a high-speed jet through a sapphire nozzle with a diameter of 0.254mm. After mixing with the abrasive in the mixing chamber of the nozzle, it is ejected through a cemented carbide sand pipe with an inner diameter of 0.76mm and a length of 76mm. Adjust the flow controller so that the flow rate of the jet abrasive is about 15g / min; adjust the pressure regulating valve. Make the jet pressure about 40MPa.

[0052] After the jet is stable, start grinding. After the grinding allowance is removed, turn off the machine, stop the jet, remove the workpiece and conduct inspection.

[0053] The above adjustment method is suitable for in-situ online dressing of the grinding wheel when the end grinding wheel is grinding a small plane, which is beneficial to improve the grinding accuracy and reduce the burn of the workpiece; at the same time, by adjusting the jet parameters, the grinding wheels with different hardness, particle size, rotation speed and binder can be dressed, which has broad application prospects; and the abrasive jet has a cooling effect to a certain extent, further reducing the grinding temperature.

[0054] The above are only exemplary embodiments of the present invention, and are not intended to limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. An abrasive water jet online dressing device for end face grinding wheel, characterized in that: It includes a machine base, a grinding wheel grinding device and a nozzle; the machine base also includes an electromagnetic suction cup, a workpiece, a water outlet pipe, a drainage chute and a column. The electromagnetic suction cup is fixedly connected in the groove at the top of the machine base, the workpiece is fixed by magnetic attraction at the top of the electromagnetic suction cup, and the inner top of the machine base is provided with a drainage chute. The machine base is fixedly connected to the water outlet pipe at the bottom of the drainage chute, and the column is fixedly installed on the right side wall of the machine base; the grinding wheel grinding device is fixedly installed in the machine base; the abrasive water jet dressing device is fixedly installed on the column, and the nozzle is fixedly installed on the abrasive water jet dressing device; The grinding wheel grinding device comprises a first motor, a first driving wheel, a first driven wheel, a first lead screw, a pin, a first belt, a sleeve, a rolling bearing, a top cover, a cantilever, a second motor, a spindle, a flange, an end grinding wheel, a grinding wheel shield, a second driving wheel, a second driven wheel and a U-shaped slide. The U-shaped slide is fixedly installed on the rear top of the machine base, the bottom of the rear side wall of the U-shaped slide is fixedly connected to the first motor, the output end of the first motor is fixedly connected to the first driving wheel, the first driving wheel is movably connected to the first belt, the top of the U-shaped slide is fixedly connected to the top cover, the inner top of the top cover, the bottom of the U-shaped slide and the outer end of the cantilever are all fixedly connected to the rolling bearing, and the inner ring of the rolling bearing is fixedly connected to The first screw is connected, the lower side of the first screw is fixedly connected to the sleeve, the top of the sleeve is fixedly connected to the first driven wheel, the first driven wheel is movably connected to the first belt, the first screw is threadedly connected to the cantilever, the second motor is fixedly installed in the straight hole opened at the top inner end of the cantilever, the output end of the second motor is fixedly connected to the second driving wheel, the second driving wheel is movably connected to the second driven wheel through the first belt, the main shaft is fixedly installed in the straight hole of the second driven wheel, the bottom of the main shaft is plugged with a flange, the flange and the main shaft are both connected by a plug pin, and the pin is in a locked state, the bottom of the flange is fixedly connected to the end grinding wheel, the bottom of the outer end of the cantilever is fixedly connected to the grinding wheel guard, and the end grinding wheel rotates in the grinding wheel guard; The abrasive water jet dressing device includes a horizontal guide groove, a fourth driven wheel, a traction belt, a third motor, a third driving wheel, a third driven wheel, a nozzle seat, a nozzle bracket, a steering gear, a steering gear guard plate, a second lead screw, a guide light rod, a fourth motor and a second belt. The fourth motor is fixedly installed on the outer wall of the column, the output end of the fourth motor is fixedly connected to the fourth driving wheel, the fourth driving wheel is movably connected to the second belt, the second belt is movably connected to the fourth driven wheel, the fourth driven wheel is fixedly connected to the second lead screw, the second lead screw is threadedly connected to the horizontal guide groove, and the horizontal guide groove is connected to the horizontal guide groove through the second lead screw. The sliding hole is slidably connected to the guide light rod, the inner end of the horizontal guide groove is fixedly installed with a third motor, the output end of the third motor is fixedly connected to the third driving wheel, the outer end of the horizontal guide groove is rotatably connected to the third driven wheel through a fixedly connected bearing, the third driven wheel and the third driving wheel are movably connected to the traction belt, the inner end of the traction belt is fixedly installed on both sides of the nozzle seat, the rear side wall of the nozzle seat is fixed with a steering gear and a steering gear guard plate, and the steering gear guard plate is arranged on the steering gear, the output end of the steering gear is fixedly connected to the nozzle bracket, and the rotating shaft of the steering gear rotates in the straight hole of the nozzle seat.

2. The abrasive water jet online dressing device for end face grinding wheel according to claim 1 is characterized in that: The side wall of the cantilever is slidably connected with the inner wall of the U-shaped slide groove, and the main shaft is rotatably connected with the cantilever through a rolling bearing.

3. The abrasive water jet online dressing device for end face grinding wheel according to claim 1 is characterized in that: The upper and lower ends of the guide light rod are fixedly installed in the straight hole of the column, and the second lead screw is rotatably connected with the column through a fixed bearing.

4. The abrasive water jet online dressing device for end face grinding wheel according to claim 1, characterized in that: The nozzle includes a nozzle base, a gem nozzle, an abrasive inlet pipe, a sand pipe, a first sealing ring, a second sealing ring, a high-pressure water inlet pipe and a mixing chamber. The sand pipe is fixedly installed in the top straight hole of the nozzle base, the second sealing ring is connected between the sand pipe and the nozzle base, a mixing chamber is opened at the middle end of the nozzle base, the nozzle base is fixedly connected to the abrasive inlet pipe at the side wall of the mixing chamber, the first sealing ring is connected between the abrasive inlet pipe and the nozzle base, the nozzle base is fixedly connected to the gem nozzle at the bottom of the mixing chamber, and the nozzle base is fixedly connected to the high-pressure water inlet pipe at the bottom of the gem nozzle.

5. The abrasive water jet online dressing device for end face grinding wheel according to claim 4 is characterized in that: The nozzle base is fixedly installed in the nozzle bracket.

6. The online trimming method based on the online trimming device according to claim 1, characterized in that: The online dressing method is as follows: S10 sets the required grinding wheel according to the workpiece processing requirements and installs the grinding wheel; S20 selects the corresponding jet abrasive according to the installed grinding wheel, and then adjusts the jet pressure, jet target distance, jet abrasive flow rate, abrasive jet spray inclination angle, jet beam diameter and horizontal translation speed of the nozzle that sprays the abrasive jet; S30 the abrasive and water are mixed into jet abrasive through a mixing agitator, and a gas-liquid booster pump and an accumulator are used to form high-pressure water. The two are mixed into an abrasive water jet in a mixing chamber in the nozzle, and finally ejected from the end outlet of the sand pipe in the nozzle.

7. The online trimming method according to claim 6, characterized in that: The abrasive jet parameters include jet pressure of 30-50MPa, jet target distance of 10-20cm, abrasive flow rate of 10-20g / min, nozzle inclination angle of 30-60°, jet beam diameter of 0.6-1.1mm, and nozzle horizontal translation speed of 1-20mm / s; the particle size of the jet abrasive is consistent with the particle size of the grinding wheel abrasive.

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