Outer circle polishing and oil spraying device

Abstract

The utility model discloses an outer circle grinding and oil spraying device in the technical field of cylindrical outer circle grinding and rust prevention, which is characterized in that an oil spraying nozzle is arranged above or below a conveying roller, so that a workpiece is driven by the conveying roller to be ground and polished by a grinding unit and then continuously moves to an oil spraying range of the oil spraying nozzle, and the workpiece is prevented from being damaged. Protective oil is sprayed to the surface of a workpiece through the oil spray nozzles, meanwhile, the workpiece moves in the axial direction of the conveying rollers and rotates under driving of the conveying rollers, the oil spray nozzles can spray oil to the workpiece in all directions, the working procedures of workpiece grinding and polishing and protective oil spraying are integrated in the stroke of the same conveying unit, the intermediate transferring step is omitted, and the working efficiency is improved. The machining process is reduced, the machining efficiency is improved, meanwhile, the equipment cost is saved, meanwhile, the conveying rollers are used for driving the workpiece to axially move and rotate, the protective oil can be comprehensively sprayed to the workpiece without moving the oil spraying nozzle, the driving characteristic of the conveying unit is fully utilized, and the influence of the protective oil on the health of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical outer circle grinding and rust prevention technology, specifically to an outer circle grinding oil spraying device. Background Technology

[0002] Currently, cylindrical workpieces such as double-ended studs and pins require manual application of rust-preventive oil for rust prevention after being polished by a polishing machine.

[0003] The following drawbacks exist in manually spraying rust-preventive oil:

[0004] 1. Grinding and polishing are done by an external cylindrical polishing machine and are two separate processes, along with manual rust-preventive oil spraying. After the workpiece is ground and polished, it needs to be transferred and reassembled before rust-preventive oil spraying. The operation process is cumbersome and it is difficult to improve work efficiency.

[0005] 2. Manually spraying rust-preventive oil requires redesigning a set of assembly components to hold the workpiece during the spraying process, resulting in higher equipment costs.

[0006] 3. When applying rust-preventive oil manually, the escaping oil may adhere to the skin of workers or be inhaled, which may affect their health.

[0007] Based on this, the present invention designs an external cylindrical grinding oil spraying device to solve the above problems. Utility Model Content

[0008] To achieve the above objectives, this utility model provides the following technical solution: an external cylindrical grinding and oil spraying device, comprising a conveying unit, a grinding unit, and an oil spraying unit;

[0009] The conveying unit includes two parallel conveying rollers and a first drive assembly for driving the conveying rollers to rotate. The conveying rollers drive the workpiece placed between the two conveying rollers to rotate and move along the axial direction of the conveying rollers. The workpiece is driven by the conveying rollers to pass through the grinding unit and the oil spraying unit in sequence. The grinding unit includes a grinding roller and a second drive assembly for driving the grinding roller to rotate. The grinding roller is located above the symmetrical line of the two conveying rollers and is arranged parallel to the conveying rollers. It is used to grind the workpiece passing under the grinding roller. The oil spraying unit includes an oil tank, an oil pump and an oil nozzle. The oil inlet and outlet of the oil pump are connected to the oil tank and the oil nozzle respectively through oil pipes. The oil nozzle is located above or below the conveying rollers and the spraying direction of the oil nozzle is towards the middle of the two conveying rollers.

[0010] As a further embodiment of this utility model, the oil spraying unit also includes an oil collection container, which is located below the conveying roller and the oil spray nozzle. The oil collection container has an upward opening, and the vertical projection of the conveying roller falls within the opening range of the oil collection container or extends beyond the opening of the oil collection container in its axial direction, ensuring that the liquid medium dripping from the conveying roller and the workpiece will be collected from the opening of the oil collection container into the oil collection container.

[0011] As a further embodiment of this utility model, at least one of the two conveying rollers has a groove along the circumferential direction, and multiple grooves are spaced apart in the axial direction of the conveying roller, and the grooves are located above the oil collection container.

[0012] As a further embodiment of this utility model, the oil nozzle is located on the side of the oil collection container near the grinding unit.

[0013] As a further embodiment of this invention, the fuel injector is located inside the fuel collection container.

[0014] As a further embodiment of this utility model, the oil collection container is provided with a protective filter screen for filtering iron filings falling from the surface of the workpiece.

[0015] As a further embodiment of this utility model, the grinding unit includes a dust cover, the grinding roller is disposed inside the dust cover, and the conveying roller passes through the dust cover.

[0016] As a further embodiment of this utility model, the surface of the dust cover is provided with an air outlet, and the dust cover is connected to a dust removal fan through the air outlet so as to extract the gas inside the dust cover by the dust removal fan.

[0017] As a further embodiment of this utility model, the grinding unit further includes a mounting assembly for mounting the grinding roller. The mounting assembly includes a vertical slide rail, a mounting platform slidably disposed on the vertical slide rail, and an adjustment assembly for adjusting the position of the mounting platform on the vertical slide rail. The grinding roller is fixedly mounted on the mounting platform.

[0018] As a further embodiment of this utility model, it also includes a feeding unit and a discharging unit, which are respectively located at both ends of the conveying roller, with the feeding unit close to the grinding unit and the discharging unit close to the oil spraying unit. The feeding unit is used to move the workpiece between the two conveying rollers, and the discharging unit is used to remove the workpiece from the conveying roller.

[0019] This utility model has the following beneficial effects:

[0020] This device positions the oil spray nozzles above or below the conveyor rollers, directing the spray towards the space between the rollers. After being polished by the grinding unit under the drive of the conveyor rollers, the workpiece continues to move into the spray range of the nozzles. Protective oil is then sprayed onto the workpiece surface through the nozzles. Simultaneously, driven by the conveyor rollers, the workpiece moves axially along the rollers and rotates, allowing the nozzles to spray oil from all directions. This integrates the workpiece polishing and protective oil spraying processes into the same conveyor unit's stroke, eliminating intermediate transfer steps, reducing processing steps, improving processing efficiency, and saving equipment costs. Furthermore, by utilizing the conveyor rollers to drive the workpiece's axial movement and rotation, the nozzles do not need to move to achieve comprehensive protective oil spraying, fully utilizing the driving characteristics of the conveyor unit and reducing the impact of the protective oil on the health of workers.

[0021] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of the first driving component in this utility model.

[0025] Figure 3 This is a top view of the grinding unit in this invention.

[0026] Figure 4 This is a front view schematic diagram of the grinding unit in this invention.

[0027] Figure 5 This is a top view of the fuel injection unit in this invention.

[0028] Figure 6 This is a front view schematic diagram of the feeding unit in this invention.

[0029] Figure 7 This is a top view of the unloading unit in this invention.

[0030] Figure 8 This is a front view schematic diagram of the unloading unit in this invention.

[0031] Legend:

[0032] 11. Conveying roller; 12. First drive assembly; 13. Groove; 21. Grinding roller; 22. Second drive assembly; 23. Dust cover; 24. Air outlet; 25. Vertical slide rail; 26. Mounting platform; 27. Adjustment assembly; 31. Oil tank; 32. Oil pump; 33. Oil nozzle; 34. Oil collection container; 41. Loading platform; 42. Lifting platform; 43. Transition platform; 51. Unloading platform; 52. Unloading hook; 53. Cylinder; Detailed Implementation

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0034] Please see Figure 1-8 This utility model provides a technical solution: an outer circle grinding and oil spraying device, including a conveying unit, a grinding unit and an oil spraying unit;

[0035] The conveying unit includes two parallel conveying rollers 11 and a first drive assembly 12 for driving the conveying rollers 11 to rotate. The conveying rollers 11 are used to drive the workpiece placed between the two conveying rollers 11 to rotate and move along the axial direction of the conveying rollers 11. The workpiece is driven by the conveying rollers 11 to pass through the grinding unit and the oil spraying unit in sequence, realizing grinding before oil spraying. During operation, the two conveying rollers 11 will rotate synchronously under the drive of the first drive assembly 12. Inclined toothed grooves are opened on the surface of the conveying rollers 11. During the rotation of the conveying rollers 11, the axial component force can be applied to the workpiece through the inclined toothed grooves on its surface. Under the action of the axial component force, the workpiece moves along the axial direction of the two conveying rollers 11. At the same time, the rotation of the two conveying rollers 11 can also drive the workpiece to rotate, ultimately realizing that the workpiece moves along the axial direction of the conveying rollers 11 while rotating.

[0036] like Figure 2 As shown, the first drive assembly 12 includes a first drive motor, a pulley located at one end of the conveyor roller 11, and a transmission belt. A pulley is also fixedly mounted on the output shaft of the first drive motor. The pulley on the output shaft of the first drive motor is connected to the pulley on the conveyor roller 11 via the transmission belt, so that the first drive motor drives the conveyor roller 11 to rotate.

[0037] The polishing unit includes a polishing roller 21 and a second drive assembly 22 for driving the polishing roller 21 to rotate. The polishing roller 21 is located above the symmetrical line of the two conveying rollers 11 and is parallel to the conveying rollers 11. It is used to polish the workpiece passing under the polishing roller 21. After the workpiece is placed between the two conveying rollers 11, it will pass under the polishing roller 21 and contact the polishing roller 21 under the drive of the conveying rollers 11. During operation, the second drive assembly 22 will drive the polishing roller 21 to rotate. When the polishing roller 21 rotates, its linear velocity will be different from the linear velocity of the workpiece, so that a speed difference is formed between the workpiece and the polishing roller 21. When the workpiece contacts the polishing roller 21, the polishing roller 21 will polish the position where the workpiece contacts it. At the same time, since the workpiece is in a state of rotation and moves along the axial direction of the conveying roller 11, the contact position between the workpiece and the polishing roller 21 changes along the circumferential and axial directions of the workpiece, thereby realizing the all-round polishing of the workpiece.

[0038] The oil spraying unit includes an oil tank 31, an oil pump 32, and an oil nozzle 33. The oil inlet and outlet of the oil pump 32 are connected to the oil tank 31 and the oil nozzle 33 respectively via oil pipes. The oil nozzle 33 is located above or below the conveyor roller 11, and the spraying direction of the oil nozzle 33 is towards the middle of the two conveyor rollers 11. After passing through the grinding unit, the workpiece on the conveyor roller 11 continues to move along the axial direction of the conveyor roller 11 under the drive of the conveyor roller 11. At this time, the workpiece has been ground and polished, and protective oil can be sprayed on the surface of the workpiece. When spraying the protective oil, the same method is used. The axial movement and rotation of the workpiece are achieved by installing an oil nozzle 33 above or below the conveyor roller 11. The oil pump 32 draws protective oil from the oil tank 31 and sprays it out through the oil nozzle 33. When the workpiece is placed between the two conveyor rollers 11, it will be in the middle of the two conveyor rollers 11, and the oil nozzle 33 is facing the middle of the two conveyor rollers 11, so that the protective oil sprayed by the oil nozzle 33 can adhere to the surface of the workpiece. Through the axial movement and rotation of the workpiece on the conveyor roller 11, the oil nozzle 33 continuously sprays protective oil, so as to achieve all-round protective oil spraying of the workpiece.

[0039] This device positions the oil spray nozzle 33 above or below the conveyor roller 11, with the spray direction of the nozzle 33 facing between the two conveyor rollers 11. After the workpiece is polished by the grinding unit under the drive of the conveyor roller 11, it continues to move into the spray range of the nozzle 33. The nozzle 33 sprays protective oil onto the surface of the workpiece. Simultaneously, driven by the conveyor roller 11, the workpiece moves axially along the conveyor roller 11 and rotates, allowing the nozzle 33 to spray oil onto the workpiece from all directions. This integrates the workpiece polishing and protective oil spraying processes into the stroke of the same conveyor unit, eliminating intermediate transfer steps, reducing processing steps, improving processing efficiency, and saving equipment costs. Furthermore, by utilizing the conveyor roller 11 to drive the workpiece axial movement and rotation, the nozzle 33 can achieve comprehensive protective oil spraying without moving, fully utilizing the driving characteristics of the conveyor unit.

[0040] Preferably, the nozzle 33 is located between the two conveying rollers 11, and the spraying direction of the nozzle 33 is vertical. This allows the protective oil sprayed from the nozzle 33 to be more concentrated between the two conveying rollers 11, while also allowing for better control of the spraying range and more precise control of the spraying boundary of the protective oil sprayed by the nozzle 33, thus reducing the waste of protective oil.

[0041] Furthermore, such as Figure 5 As shown, the oil spraying unit also includes an oil collection container 34, which is located below the conveying roller 11 and the oil spray nozzle 33. The oil collection container 34 has an upward opening, and the vertical projection of the conveying roller 11 only falls within the opening range of the oil collection container 34 or extends beyond the opening of the oil collection container 34 in its axial direction, ensuring that the liquid medium dripping from the conveying roller 11 and the workpiece will be collected from the opening of the oil collection container 34 into the oil collection container 34.

[0042] When spraying protective oil onto the workpiece through the nozzle 33, in order to achieve the required coverage of the protective oil on the workpiece surface, the amount of protective oil sprayed needs to exceed the required amount of protective oil on the workpiece surface. This causes the protective oil on the workpiece surface to drip. An oil collection container 34 is set below the conveying roller 11 and the nozzle 33. The protective oil dripping from the workpiece surface can be collected through the oil collection container 34. This not only enables the recycling of the protective oil, but also prevents the protective oil from polluting the working environment.

[0043] Preferably, the vertical projection of the conveying roller 11 extends beyond the opening of the oil collection container 34 only in its axial direction, with the direction perpendicular to the axial direction of the conveying roller 11 on the horizontal plane as the first direction, such as... Figure 5As shown, in the first direction, the maximum distance between the two conveying rollers 11 is less than the length of the oil collection container 34 in the first direction. That is to say, the protective oil dripping from the conveying rollers 11 will also enter the oil collection container 34 below, so as to collect the protective oil on the conveying rollers 11. The oil collection container 34 can collect both the workpiece and the protective oil dripping from the conveying rollers 11 at the same time.

[0044] Furthermore, such as Figure 5 As shown, at least one of the two conveying rollers 11 has a groove 13 along the circumferential direction. Multiple grooves 13 are spaced apart in the axial direction of the conveying roller 11. The grooves 13 are located above the oil collection container 34.

[0045] After the workpiece passes through the oil spray nozzle 33, protective oil adheres to its surface. Excess protective oil accumulates at the contact point between the workpiece and the conveyor roller 11 due to the workpiece's rotation. Because of gravity, the workpiece is pressed tightly against the surface of the conveyor roller 11. The protective oil above the workpiece cannot penetrate the contact point between the workpiece and the conveyor roller 11 to reach below it. This results in protective oil dripping from the workpiece's surface when it finally leaves the conveyor roller 11, wasting the protective oil and polluting the working environment. Therefore, if... Figure 5 As shown, at least one of the two conveying rollers 11 has a groove 13. When the workpiece passes the oil nozzle 33, the workpiece will move to the position where the groove 13 is located on the conveying roller 11. A gap will be generated between the groove 13 on the conveying roller 11 and the workpiece, so that the protective oil on the workpiece can move from the groove 13 to the workpiece and the area below the conveying roller 11, and drip smoothly from the workpiece and the conveying roller 11 to prevent the protective oil from accumulating on the workpiece and the conveying roller 11.

[0046] Furthermore, such as Figure 5 As shown, the oil nozzle 33 is located on the side of the oil collection container 34 near the grinding unit. Since the protective oil will only adhere to the surface of the workpiece after passing through the oil nozzle 33, the oil nozzle 33 is located above the side of the oil collection container 34 near the grinding unit. This allows the area of ​​the oil collection container 34 to be increased as much as possible while keeping the area of ​​the oil collection container 34 unchanged, thus making full use of the space of the oil collection container 34.

[0047] Furthermore, the fuel injector 33 is located inside the oil collection container 34;

[0048] By placing the fuel injector 33 inside the oil collection container 34, the protective oil sprayed from the fuel injector 33 can be restricted by the oil collection container 34, which can effectively prevent the protective oil from escaping and further reduce the waste of protective oil.

[0049] Furthermore, a protective filter screen is installed inside the oil collection container 34 to filter iron filings falling from the surface of the workpiece.

[0050] The protective oil collected in the oil collection container 34 needs to be recycled. During the grinding and polishing process of the workpiece, iron filings may adhere to the surface of the workpiece. In order to prevent iron filings from being recycled along with the protective oil, a protective filter screen is installed in the oil collection container 34. The protective oil dripping into the oil collection container 34 is filtered through the protective filter screen to prevent iron filings from entering the oil pump 32 or the oil spray nozzle and causing damage to the oil pump 32 or the oil spray nozzle.

[0051] Furthermore, such as Figure 3 As shown, the grinding unit includes a dust cover 23, a grinding roller 21 disposed inside the dust cover 23, and a conveying roller 11 passing through the dust cover 23;

[0052] When polishing a workpiece with the grinding roller 21, a large amount of dust is generated. By placing the grinding roller 21 inside the dust cover 23, the grinding and polishing of the workpiece by the grinding roller 21 is carried out inside the dust cover 23. The dust cover 23 isolates the dust generated during grinding and polishing from the external working environment, reducing the impact of dust on the working environment during the workpiece grinding and polishing process.

[0053] Furthermore, such as Figure 4 As shown, the surface of the dust cover 23 is provided with an air outlet 24. The dust cover 23 is connected to a dust removal fan through the air outlet 24 so that the dust removal fan can draw out the gas inside the dust cover 23.

[0054] If the dust generated during the grinding and polishing of the workpiece is not treated in time, it will accumulate inside the dust cover 23, affecting the safe use of the grinding unit inside the dust cover 23. Therefore, by connecting the dust cover 23 to the dust removal fan, the dust removal fan continuously draws air from inside the dust cover 23 during the grinding and polishing of the workpiece, so that the dust generated during the grinding of the workpiece can be driven away from the dust cover 23 by the airflow, thereby preventing the dust from accumulating inside the dust cover 23 and ensuring the safe use of the grinding unit.

[0055] Furthermore, such as Figure 3-4 As shown, the grinding unit also includes a mounting assembly for mounting the grinding roller 21. The mounting assembly includes a vertical slide rail 25, a mounting platform 26 that is vertically slidably disposed on the vertical slide rail 25, and an adjustment assembly 27 for adjusting the position of the mounting platform 26 on the vertical slide rail 25. The grinding roller 21 is fixed on the mounting platform 26.

[0056] In this example, the adjustment component 27 is a vertically arranged lead screw, and the mounting platform 26 is threaded onto the lead screw. By rotating the lead screw, the position of the mounting platform 26 on the vertical slide rail 25 is adjusted to adjust the height of the grinding roller 21, thereby changing the distance between the grinding roller 21 and the conveying roller 11 to accommodate workpieces of different diameters.

[0057] Specifically, in this example, the second drive assembly 22 includes a second drive motor, a pulley fixed on the grinding roller 21, and a transmission belt. The output shaft of the second drive motor is provided with a pulley, and the pulley on the second drive motor and the pulley on the grinding roller 21 are transmitted through the transmission belt so as to drive the grinding roller 21 to rotate through the second drive motor.

[0058] Furthermore, such as Figure 1 As shown, the outer circle grinding and oil spraying device also includes a feeding unit and an unloading unit. The feeding unit and the unloading unit are respectively located at both ends of the conveying roller 11, with the feeding unit close to the grinding unit and the unloading unit close to the oil spraying unit. The feeding unit is used to move the workpiece between the two conveying rollers 11, and the unloading unit is used to remove the workpiece from the conveying roller 11, so as to realize fully automatic grinding, polishing and oil spraying of the workpiece.

[0059] The loading and unloading units can use clamps;

[0060] Preferably, in this example, the feeding unit includes an inclined feeding platform 41 and a lifting platform 42 disposed between the feeding platform 41 and the conveying roller 11, such as... Figure 6 As shown, the loading platform 41 and the lifting platform 42 are both inclined downwards at the ends near the conveyor roller 11. After the workpiece is placed on the loading platform 41, it will roll on the side of the loading platform 41 near the conveyor roller 11 under the action of gravity. At this time, the lifting platform 42 is higher than the loading platform 41, and the lifting platform 42 blocks the workpiece. When it is necessary to move the workpiece to the conveyor roller 11, the lifting platform 42 can be lowered so that its top surface is lower than the loading platform 41. At this time, the workpiece on the loading platform 41 rolls to the lifting platform 42 under the action of gravity. Then the lifting platform 42 rises to lift the workpiece. There is also a transition platform 43 between the lifting platform 42 and the conveyor roller 11. The workpiece is moved to the transition platform 43 by the lifting platform 42. The transition platform 43 is inclined in the same direction as the lifting platform 42. When the workpiece moves to the transition platform 43, it will roll along the transition platform 43 between the two conveyor rollers 11 under the action of gravity and finally fall between the two conveyor rollers 11, realizing automatic loading.

[0061] Preferably, in this example, such as Figure 7-8As shown, the unloading unit includes an inclined unloading platform 51 and an inclined unloading hook 52. The unloading platform 51 and the unloading hook 52 are inclined downwards on the side away from the conveying roller 11. The unloading hook 52 is located between the unloading platform 51 and the conveying roller 11. Of the two conveying rollers 11, the conveying roller 11 closer to the unloading platform 51 is shorter than the conveying roller 11 farther from the unloading platform 51. Several unloading wheels are arranged on the side of the unloading platform 51 close to the conveying roller 11. The unloading roller is coaxially arranged with the shorter conveying roller 11, and the several unloading wheels are spaced apart. The unloading hook 52 is located below the gap between the unloading wheels, and the unloading hook 52 can be raised by the cylinder 53 below it. The workpiece will eventually move onto the unloading wheel under the drive of the two conveying rollers 11. The unloading hook 52 is raised by the cylinder 53 so that the unloading hook 52 lifts the workpiece from below, thereby making the workpiece rise between the conveying rollers 11 and the unloading wheel. Since the unloading hook 52 is in an inclined state, the workpiece will roll towards the unloading platform 51 under the action of gravity, and finally roll onto the unloading platform 51 to realize automatic unloading.

[0062] The automatic loading and unloading of workpieces is achieved through the loading and unloading units, which improves the automation level of the overall device, makes the device more convenient to use, and reduces the need for labor costs.

[0063] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An external cylindrical grinding oil spraying device, characterized in that: Includes a conveying unit, a grinding unit, and an oil spraying unit; The conveying unit includes two parallel conveying rollers (11) and a first drive assembly (12) for driving the conveying rollers (11) to rotate. The conveying rollers (11) are used to drive the workpiece placed between the two conveying rollers (11) to rotate and move along the axial direction of the conveying rollers (11). The workpiece is driven by the conveying rollers (11) to pass through the grinding unit and the oil spraying unit in sequence. The grinding unit includes a grinding roller (21) and a second drive assembly (22) for driving the grinding roller (21) to rotate. The grinding roller (21) is located above the symmetrical line of the two conveying rollers (11) and is parallel to the conveying rollers (11) for grinding the workpiece passing under the grinding roller (21). The oil spraying unit includes an oil tank (31), an oil pump (32), and an oil nozzle (33). The oil inlet and outlet of the oil pump (32) are connected to the oil tank (31) and the oil nozzle (33) respectively through oil pipes. The oil nozzle (33) is located above or below the conveying roller (11), and the oil spraying direction of the oil nozzle (33) is towards the middle of the two conveying rollers (11).

2. The external cylindrical grinding oil spraying device according to claim 1, characterized in that: The oil spraying unit also includes an oil collection container (34), which is located below the conveying roller (11) and the oil nozzle (33). The oil collection container (34) has an upward opening, and the vertical projection of the conveying roller (11) falls within the opening range of the oil collection container (34) or extends beyond the opening of the oil collection container (34) in its axial direction, ensuring that the liquid medium dripping from the conveying roller (11) and the workpiece will be collected from the opening of the oil collection container (34) into the oil collection container (34).

3. The external cylindrical grinding oil spraying device according to claim 2, characterized in that: At least one of the two conveying rollers (11) has a groove (13) circumferentially provided on it. Multiple grooves (13) are spaced apart in the axial direction of the conveying roller (11), and the grooves (13) are located above the oil collection container (34).

4. The external cylindrical grinding oil spraying device according to claim 2, characterized in that: The oil injector (33) is located on the side of the oil collection container (34) near the grinding unit.

5. The external cylindrical grinding oil spraying device according to claim 2, characterized in that: The fuel injector (33) is located inside the oil collection container (34).

6. The external cylindrical grinding oil spraying device according to claim 2, characterized in that: The oil collection container (34) is equipped with a protective filter screen to filter iron filings falling from the surface of the workpiece.

7. The external cylindrical grinding oil spraying device according to claim 1, characterized in that: The grinding unit includes a dust cover (23), the grinding roller (21) is disposed inside the dust cover (23), and the conveying roller (11) passes through the dust cover (23).

8. The external cylindrical grinding oil spraying device according to claim 7, characterized in that: The surface of the dust cover (23) is provided with an air outlet (24). The dust cover (23) is connected to a dust removal fan through the air outlet (24) so ​​that the dust removal fan can extract the gas inside the dust cover (23).

9. The external cylindrical grinding oil spraying device according to claim 1, characterized in that: The grinding unit also includes a mounting assembly for mounting the grinding roller (21). The mounting assembly includes a vertical slide rail (25), a mounting platform (26) slidably mounted on the vertical slide rail (25), and an adjustment assembly (27) for adjusting the position of the mounting platform (26) on the vertical slide rail (25). The grinding roller (21) is fixed on the mounting platform (26).

10. The external cylindrical grinding oil spraying device according to claim 1, characterized in that: It also includes a feeding unit and a discharging unit, which are respectively located at both ends of the conveying roller (11), with the feeding unit close to the grinding unit and the discharging unit close to the oil spraying unit. The feeding unit is used to move the workpiece between the two conveying rollers (11), and the discharging unit is used to remove the workpiece from the conveying roller (11).

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