Main shaft sleeve for micro-deformation step quenching treatment

Abstract

The utility model provides a main shaft sleeve for micro-deformation step quenching treatment, and belongs to the technical field of main shaft sleeves. Comprising a main shaft sleeve body which is subjected to micro-deformation step quenching treatment; the two sealing grooves are formed in the main shaft sleeve body and are distributed up and down; the magnetorheological fluid is arranged in the sealing groove in a filling manner; the two annular strips are arranged on the main shaft sleeve body and correspond to the sealing grooves, and the annular strips are hollow; and the electromagnetic coil is arranged in the annular strip and is used for generating a magnetic field to change the state of the magnetorheological fluid. By arranging the electromagnetic coil and the magnetorheological fluid, sealing is strengthened by applying a magnetic field during high-speed rotation and high-load work, lubricating oil can be effectively prevented from leaking, external pollutants can be effectively prevented from entering, and the problem that the sealing performance of a traditional sealing mode is reduced under severe working conditions is solved.

Description

Technical Field

[0001] This utility model relates to the field of spindle sleeve technology, and in particular to a spindle sleeve with micro-deformation graded quenching treatment. Background Technology

[0002] The spindle sleeve is a component in the spindle system of a CNC machining center. It plays a role in fixing, lubricating, and cooling the spindle during operation. It is an important component in the spindle system, providing stable radial and axial support for the high-speed rotating spindle and ensuring the rotational accuracy of the spindle during operation.

[0003] Currently, traditional spindle sleeves typically use mechanical seals or oil seals to prevent lubricating oil leakage and the entry of external contaminants. Under high-speed rotation and high-load working conditions, traditional sealing methods are difficult to maintain good sealing performance for a long time, which can easily lead to lubricating oil leakage, thereby affecting the lubrication and heat dissipation of the spindle and reducing the service life of the spindle. Therefore, this application provides a spindle sleeve with micro-deformation graded quenching treatment to meet the requirements. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a spindle sleeve with micro-deformation graded quenching treatment to solve the problem that traditional sealing methods are difficult to maintain good sealing performance for a long time under high-speed rotation and high-load working conditions.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution.

[0006] A spindle sleeve subjected to micro-deformation graded quenching treatment includes: a spindle sleeve body subjected to micro-deformation graded quenching treatment; two sealing grooves disposed within the spindle sleeve body, arranged vertically; a magnetorheological fluid filled within the sealing grooves; two annular bars disposed on the spindle sleeve body and corresponding to the sealing grooves, the annular bars being hollow; and an electromagnetic coil disposed within the annular bars for generating a magnetic field to change the state of the magnetorheological fluid.

[0007] The magnetorheological fluid is designed to maintain a low viscosity in the absence of an external magnetic field.

[0008] The magnetorheological fluid is designed to rapidly harden into a temporary solid structure after a magnetic field is applied through the electromagnetic coil.

[0009] The sealing groove is dovetail-shaped, and the inside of the sealing groove is covered with low-viscosity sealant or elastic sealing film.

[0010] It also includes a cooling channel, which is disposed within the annular bar and wraps around the electromagnetic coil, and the cooling channel is spiral in shape.

[0011] It also includes: coolant, which is filled and disposed within the cooling channel.

[0012] It also includes a temperature sensor, which is disposed within the annular strip.

[0013] Compared with the prior art, this utility model has at least the following beneficial effects.

[0014] In the above solution, by setting up an electromagnetic coil and magnetorheological fluid, a magnetic field is applied to strengthen the seal during high-speed rotation and high-load operation, which can effectively prevent lubricating oil leakage and the entry of external contaminants, overcoming the problem of reduced sealing performance of traditional sealing methods under harsh working conditions.

[0015] By setting up temperature sensors, cooling channels, and coolant, the temperature can be monitored in real time, and the cooling can be adjusted in a timely manner according to temperature changes, which can effectively remove the heat generated by the electromagnetic coil during operation. Attached Figure Description

[0016] Figure 1 A schematic diagram of a spindle sleeve subjected to micro-deformation graded quenching treatment.

[0017] Figure 2 This is a cross-sectional view of the ring-shaped bar structure.

[0018] Figure 3 for Figure 1 A magnified view of A in the middle.

[0019] [Figure Labels]

[0020] 1. Spindle sleeve body; 2. Annular bar; 3. Magnetorheological fluid; 4. Sealing groove; 5. Electromagnetic coil; 21. Temperature sensor; 22. Coolant; 23. Cooling channel.

[0021] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0022] The present invention provides a micro-deformation graded quenching treatment spindle sleeve with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some known technologies, those skilled in the art can also use other alternative methods to implement the invention. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0023] like Figure 1 - Figure 3 As shown, an embodiment of this utility model provides a spindle sleeve subjected to micro-deformation graded quenching treatment, comprising: a spindle sleeve body 1, subjected to micro-deformation graded quenching treatment; two sealing grooves 4, disposed within the spindle sleeve body 1, arranged vertically; a magnetorheological fluid 3, filled within the sealing grooves 4; two annular bars 2, disposed on the spindle sleeve body 1 and corresponding to the sealing grooves 4, the annular bars 2 being hollow; and an electromagnetic coil 5, disposed within the annular bars 2, used to generate a magnetic field to change the state of the magnetorheological fluid 3. The magnetorheological fluid 3 is a smart material, mainly composed of magnetic particles, a base fluid, and additives; the electromagnetic coil 5 is powered and precisely controlled by external equipment.

[0024] The magnetorheological fluid 3 is designed to maintain a low viscosity state without the influence of an external magnetic field. In the absence of magnetic field intervention, the magnetic particles in the magnetorheological fluid 3 are randomly dispersed in the base fluid, and there is no directional arrangement or aggregation between them caused by the magnetic field. The internal friction of the fluid is extremely small, and the overall fluid exhibits a low viscosity state similar to that of a Newtonian fluid. This allows it to flow freely like ordinary lubricating oil without adding extra resistance to the operation of the equipment.

[0025] The magnetorheological fluid 3 is designed to rapidly harden into a temporary solid structure when a magnetic field is applied by the electromagnetic coil 5. When the electromagnetic coil 5 applies a magnetic field, the magnetic particles in the magnetorheological fluid 3 will rapidly polarize under the influence of the magnetic field. These polarized magnetic particles will align along the direction of the magnetic field, forming chain-like or columnar structures. As the magnetic field strength increases, these chain-like or columnar structures will continuously aggregate and cross-link, causing the viscosity of the magnetorheological fluid 3 to increase sharply. When the viscosity increases to a certain level, the magnetorheological fluid 3 will change from a liquid state to a state similar to a solid, which is the so-called "rapid hardening to form a temporary solid structure".

[0026] The sealing groove 4 is dovetail-shaped, and its interior is covered with a low-viscosity sealant or an elastic sealing film. The dovetail shape of the sealing groove 4 helps prevent leakage of the magnetorheological fluid 3 to some extent; the narrow opening of the dovetail shape can impede the flow of the fluid. The low-viscosity sealant is typically an organic sealing material such as silicone or polyurethane. After application, it undergoes a curing reaction over time, depending on factors such as air humidity and temperature, or requiring heating, forming an elastic, strong solid adhesive layer. The cured sealant adheres tightly to the inner wall of the sealing groove 4, filling tiny pores. In the absence of a magnetic field, its adhesion and blocking effect prevent the magnetorheological fluid 3 from leaking out due to gravity, shaking, or other factors. When the electromagnetic coil 5 is energized to generate a magnetic field, the magnetic field can still penetrate the sealant due to its flexibility and act on the magnetorheological fluid 3 below, allowing the fluid to smoothly transform into a high-viscosity sealing state. The elastic sealing film is usually made of rubber or polymer film, such as nitrile rubber film or polytetrafluoroethylene film. When there is no magnetic field, the elastic film relies on its own elastic tension and its tight fit with the edge of the sealing groove 4 to build a physical barrier for the magnetorheological fluid 3. Once the electromagnetic coil 5 is turned on, the magnetic field can pass through the film without hindrance, causing the magnetorheological fluid 3 below to respond to the change in magnetic field and achieve the sealing task.

[0027] It also includes a cooling channel 23, which is set inside the annular bar 2 and wraps around the electromagnetic coil 5. The cooling channel 23 is spiral in shape. The cooling channel 23 includes an inlet and an outlet, which are sealed to external equipment. The external equipment controls the circulation of the coolant 22. The spiral shape of the cooling channel 23 can greatly extend the flow path of the coolant 22 in the channel, so that the coolant 22 has a longer contact time and a larger contact area with the electromagnetic coil 5. When the coolant 22 circulates in the cooling channel 23, it can more efficiently absorb the heat generated by the electromagnetic coil 5 when it is working.

[0028] It also includes: coolant 22, which is filled and disposed in the cooling channel 23. By distributing the coolant 22, it circulates along the cooling channel 23, absorbing the heat generated when the electromagnetic coil 5 is working, and then cooling it through external equipment.

[0029] It also includes a temperature sensor 21, which is disposed within the annular strip 2. By setting the temperature sensor 21, the temperature changes generated when the electromagnetic coil 5 is working can be captured in real time and accurately, and the data can be transmitted to an external device for adjustment of the electromagnetic coil 5.

[0030] The technical solution provided by this utility model involves installing the spindle sleeve body 1, starting the spindle to bring it into normal operation, adjusting the current intensity of the electromagnetic coil 5 to generate a magnetic field, and rapidly hardening the magnetorheological fluid 3 under the action of the magnetic field to form a temporary solid structure that tightly fills the sealing groove 4; the temperature inside the annular strip 2 is monitored in real time by the temperature sensor 21, and when the temperature rises, the coolant 22 is circulated through the inlet and outlet of the cooling channel 23 connected to the external equipment to carry away the heat generated by the electromagnetic coil 5.

[0031] The micro-deformation graded quenching treatment of the spindle sleeve of this utility model has the following characteristics: 1. The deformation is small, and only the inner hole and outer circle need to be precision ground after heat treatment before delivery; therefore, all the structures and dimensions of the inner hole and outer circle of the spindle sleeve can be machined in place before heat treatment, which greatly reduces the difficulty and time of machining.

[0032] 2. The hardness is increased to 48-52HRC, making it less prone to wear, maintaining more stable precision, and significantly reducing the maintenance rate, essentially eliminating the need for replacement.

[0033] The micro-deformation graded quenching treatment of the spindle sleeve of this utility model adopts the following process: 1. Select 42CrMo steel as the material of the spindle sleeve.

[0034] 2. Use a slightly lower austenitizing temperature of 820-830℃ for holding, and then perform slow graded quenching. Under the premise of obtaining qualified microstructure and hardness, ensure that the deformation amount is ≤0.03mm.

[0035] The micro-deformation graded quenching treatment of the spindle sleeve of this utility model has the following technical indicators: 1. Hardness 48-52HRC.

[0036] 2. Deformation amount ≤ 0.03mm.

[0037] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art can fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A spindle sleeve subjected to micro-deformation graded quenching treatment, characterized in that, include: The main spindle sleeve body (1) is subjected to micro-deformation graded quenching treatment; Two sealing grooves (4) are provided inside the main shaft sleeve body (1) and are distributed vertically; Magnetorheological fluid (3) is filled in the sealing groove (4); Two annular bars (2) are provided on the main shaft sleeve body (1) and correspond to the sealing groove (4). The annular bars (2) are hollow. An electromagnetic coil (5) is disposed within the annular bar (2) to generate a magnetic field to change the state of the magnetorheological liquid (3).

2. The spindle sleeve subjected to micro-deformation graded quenching treatment according to claim 1, characterized in that, The magnetorheological fluid (3) is configured to maintain a low viscosity state in the absence of an external magnetic field.

3. The spindle sleeve subjected to micro-deformation graded quenching treatment according to claim 1, characterized in that, The magnetorheological fluid (3) is designed to rapidly harden into a temporary solid structure after a magnetic field is applied through the electromagnetic coil (5).

4. The spindle sleeve subjected to micro-deformation graded quenching treatment according to claim 1, characterized in that, The sealing groove (4) is dovetail shaped, and the sealing groove (4) is covered with low viscosity sealant or elastic sealing film.

5. The spindle sleeve subjected to micro-deformation graded quenching treatment according to claim 1, characterized in that, Also includes: A cooling channel (23) is provided inside the annular bar (2) and wraps the electromagnetic coil (5). The cooling channel (23) is spiral in shape.

6. The spindle sleeve subjected to micro-deformation graded quenching treatment according to claim 5, characterized in that, Also includes: Coolant (22) is filled in the cooling channel (23).

7. The spindle sleeve subjected to micro-deformation graded quenching treatment according to claim 1, characterized in that, Also includes: A temperature sensor (21) is disposed within the annular strip (2).

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