Internal cooling and shaft end protection structure for cutter grinding main shaft

Abstract

The utility model discloses an internal cooling and shaft end protection structure for a cutter grinding main shaft, which relates to the technical field of cutter grinding main shafts and comprises a main shaft, a stator and rotor assembly is arranged on the main shaft, the main shaft is connected with a machine body through an open bearing A, and a rear bearing chamber is arranged on the right side of the machine body. Dustproof assemblies are arranged on the outer side of the machine body and the outer side of the rear bearing chamber respectively, the machine body is provided with an air nozzle and a water inlet, air enters the machine body through an air source processor, an air pipe and the air nozzle and is discharged through air gaps among the stator and rotor assembly, the open type bearing A, the open type bearing B, the locking nut and the dustproof assemblies, and therefore internal heat and grinding wheel chips are brought out. The utility model has the advantages of simple structure, internal and external double-cooling structure, obviously improved cooling effect, improved processing precision, obviously enhanced positive pressure protection effect of the shaft end, effectively prolonged service life of the main shaft, prolonged dustproof and waterproof effects, and reliable performance.

Description

Technical Field

[0001] The utility model relates to the technical field of tool grinding spindles, in particular to an internal cooling and shaft end protection structure for a tool grinding spindle. Background Art

[0002] The tool grinding spindle is a key component in the tool processing process. Traditional tool grinding spindles usually use self-cooling, air cooling, or only external cooling. Although these cooling methods can reduce the spindle temperature, the cooling efficiency is low, the spindle thermal deformation is serious, and it is difficult to maintain a processing accuracy within 5μm. The shaft end protection is also very simple, and it is easy for liquid and grinding wheel chips to enter, thereby damaging the spindle. Therefore, the cooling and protection effects of the existing technical solutions are obviously insufficient. Summary of the invention

[0003] The utility model aims to solve the above technical problems and provides an internal cooling and shaft end protection structure for a tool grinding spindle.

[0004] In order to achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by the utility model is: an internal cooling and shaft end protection structure for a knife grinding spindle, comprising a spindle, on which a stator and rotor assembly is arranged, characterized in that: the spindle is connected to a machine body through an open bearing A, a rear bearing chamber is arranged on the right side of the machine body, an open bearing B is arranged in the rear bearing chamber, the open bearing A and the open bearing B are locked by a locking nut, dustproof assemblies are arranged on the outer sides of the machine body and the rear bearing chamber respectively, an air nozzle and a water inlet are arranged on the machine body, the air nozzle is connected to an air source processor through an air pipe, the gas enters the interior of the machine body through the air source processor, the air pipe and the air nozzle, and is discharged through the air gap between the stator and rotor assembly, the open bearing A, the open bearing B, the locking nut and the dustproof assembly, thereby taking out the internal heat and grinding wheel chips.

[0005] Preferably, an internal water channel is arranged in the machine body, and a water channel pressure plate is arranged on one side of the machine body. The coolant enters the internal water channel through the water inlet to perform external cooling on the motor.

[0006] Preferably, grinding wheel assemblies are symmetrically arranged at both ends of the main shaft, and the grinding wheel assemblies are connected to the main shaft by screws.

[0007] Preferably, the dustproof assembly comprises a dustproof cover, and a combined seal is provided on one side of the dustproof cover.

[0008] Working principle: The motor is cooled externally by coolant and internally by clean compressed air, thus forming an internal and external cooling structure, and the cooling effect is significantly improved; because compressed air passes through the inside, positive pressure is formed inside the spindle, and the compressed air is discharged from the front and rear dust covers, making it extremely difficult for grinding wheel chips and cutting fluid to invade the inside of the spindle, thereby protecting the spindle and extending the service life of the spindle.

[0009] Compared with the traditional structure, the utility model has the following beneficial effects:

[0010] 1. The utility model has a simple structure, is easy to install and process, and adopts an internal and external double cooling structure, which significantly improves the cooling effect and can meet the tool processing accuracy within 2μm. The positive pressure protection effect of the shaft end is significantly enhanced, which can effectively extend the service life of the spindle and extend its dust and water proof effects. It has reliable performance and is easy to promote and apply.

[0011] 2. By passing clean compressed air into the spindle and discharging it from the front and rear dustproof components, the heat of the spindle stator, rotor and bearings can be taken out, so that the inside of the spindle can be effectively cooled. In addition, since the compressed air directly acts on the inside of the spindle, positive pressure is formed inside the spindle, so that the end of the spindle is effectively protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] In the figure: 1. Air source processor, 2. Air nozzle, 3. Water inlet, 4. Water channel pressure plate, 5. Dust cover, 6. Combined seal, 7. Grinding wheel assembly, 8. Spindle, 9. Screw, 10. Lock nut, 11. Open bearing A, 12. Stator and rotor assembly, 13. Open bearing B, 14. Rear bearing chamber, 15. Machine body, 16. Internal water channel. DETAILED DESCRIPTION

[0014] The utility model is further described below.

[0015] Referring to the accompanying drawings, an internal cooling and shaft end protection structure for a knife grinding spindle includes a spindle 8, on which a stator and rotor assembly 12 is arranged, and is characterized in that: the spindle 8 is connected to a body 15 through an open bearing A11, a rear bearing chamber 14 is arranged on the right side of the body 15, an open bearing B13 is arranged in the rear bearing chamber 14, the open bearing A11 and the open bearing B13 are locked by a locking nut 10, dustproof components are arranged on the outer sides of the body 15 and the rear bearing chamber 14 respectively, an air nozzle 2 and a water inlet 3 are arranged on the body 15, the air nozzle 2 is connected to an air source processor 1 through an air pipe, the gas enters the body 15 through the air source processor 1, the air pipe and the air nozzle 2, and is discharged through the air gap between the stator and rotor assembly 12, the open bearing A11, the open bearing B13, the locking nut 10 and the dustproof component.

[0016] In this preferred embodiment, an internal water channel 16 is provided in the machine body 15, and a water channel pressure plate 4 is provided on one side of the machine body 15. The coolant enters the internal water channel 16 through the water inlet 3 to perform external cooling on the motor.

[0017] In the preferred embodiment, grinding wheel assemblies 7 are symmetrically arranged at both ends of the main shaft 8 , and the grinding wheel assemblies 7 are connected to the main shaft 8 via screws 9 .

[0018] In this preferred embodiment, the dustproof assembly includes a dustproof cover 5 , and a combined seal 6 is provided on one side of the dustproof cover 5 .

[0019] In specific implementation, on the basis of existing cooling and shaft end protection, clean compressed air of 0.2-0.25Mpa is passed to the machine body 15 through the air source processor 1. The compressed air must be filtered and separated from oil and water, and the required pressure is maintained to prevent the bearing grease from being contaminated and insufficient. The compressed air is discharged through the air gap between the stator and rotor components 12, the open bearing A11, the open bearing B13, the locking nut 10 and the dustproof component, thereby taking out the internal heat and grinding wheel chips, and the coolant is passed to the water channel 16 inside the machine body 15 through the water inlet 3 to supply the motor External cooling generally requires the tool processing accuracy to be maintained within 5μm. The internal and external double cooling structure of the utility model significantly improves the cooling effect, reducing the thermal extension of the spindle (from cold to hot) from the original 0.019mm to within 0.01mm, and the thermal extension retention after thermal stability is increased from the original within 5μm to within 2μm; because compressed air is passed inside, a positive pressure is formed inside the spindle, and the compressed air is discharged from the front and rear dustproof components, making it extremely difficult for grinding wheel chips and cutting fluid to invade the inside of the spindle, thereby protecting the spindle and extending the service life of the spindle. The shaft end adopts a double-headed installation of the grinding wheel disc assembly 7, and the front and rear dustproof components and the front and rear grinding wheel disc assembly 7 adopt the same design, with a simple structure, which can meet different processing requirements such as rough and fine grinding of the grinding wheel.

[0020] The above embodiments of the present invention are merely examples to clearly illustrate the present invention, but are not intended to limit the protection scope of the present invention. All equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. An internal cooling and shaft end protection structure for a tool grinding spindle, comprising a spindle (8), wherein a stator and rotor assembly (12) is arranged on the spindle (8), characterized in that: The main shaft (8) is connected to the machine body (15) via an open bearing A (11); a rear bearing chamber (14) is provided on the right side of the machine body (15); an open bearing B (13) is provided in the rear bearing chamber (14); the open bearing A (11) and the open bearing B (13) are locked via a locking nut (10); dustproof components are provided on the outside of the machine body (15) and the rear bearing chamber (14); an air nozzle (2) and a water inlet (3) are provided on the machine body (15); the air nozzle (2) is connected to the air source processor (1) via an air pipe; the gas enters the machine body (15) via the air source processor (1), the air pipe and the air nozzle (2), and is discharged via the air gap between the stator and rotor components (12), the open bearing A (11), the open bearing B (13), the locking nut (10) and the dustproof component.

2. The internal cooling and shaft end protection structure for a knife grinding spindle according to claim 1, characterized in that: An internal water channel (16) is provided in the machine body (15), and a water channel pressure plate (4) is provided on one side of the machine body (15). Cooling liquid enters the internal water channel (16) through the water inlet (3) to perform external cooling on the motor.

3. The internal cooling and shaft end protection structure for the tool grinding spindle according to claim 1, characterized in that: Grinding wheel assemblies (7) are symmetrically arranged at both ends of the main shaft (8), and the grinding wheel assemblies (7) are connected to the main shaft (8) via screws (9).

4. The internal cooling and shaft end protection structure for a knife grinding spindle according to claim 1, characterized in that: The dustproof assembly comprises a dustproof cover (5), and a combined seal (6) is provided on one side of the dustproof cover (5).

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