Gear honing machine grinding wheel shaft device and adjusting method

Abstract

The present application relates to the field of honing technology, in particular to a gear-honing machine grinding wheel shaft device and adjusting method. The main shaft has a grinding wheel mounting section; a ring-shaped elastic expansion member is sleeved on the inside of the grinding wheel mounting section, the two ends of the ring-shaped elastic expansion member are sealingly fixed with the main shaft to form a ring-shaped pressure chamber that is in whole-circle communication between the outer circumferential surface of the ring-shaped elastic expansion member and the inner circumferential surface of the main shaft, the ring-shaped pressure chamber is used for injecting pressure transmission medium, and the inner circumferential surface of the ring-shaped elastic expansion member is used for mounting the grinding wheel; a plurality of pressure adjusting members are arranged in a circumferential direction of the ring-shaped pressure chamber, each pressure adjusting member is mounted on the main shaft to change the pressure of the corresponding circumferential area in the ring-shaped pressure chamber, thereby driving the ring-shaped elastic expansion member to produce radial deformation in the corresponding area. The above structure cooperates to significantly improve the mounting accuracy and adjustability of the grinding wheel under the premise of ensuring the safety of the grinding wheel clamping, and ultimately ensures the machining quality of the gear tooth surface.

Description

Technical Field

[0001] This invention relates to the field of honing technology, and more specifically, to a honing machine grinding wheel shaft device and adjustment method. Background Technology

[0002] In gear honing, the grinding wheel needs to be mounted on the spindle via a tightening structure. The commonly used mounting method is to use a screw to axially push a mechanical tapered sleeve, forcing the tapered sleeve to deform radially, thereby pressing it against the inner bore of the grinding wheel.

[0003] However, in actual production, it was found that this installation method is very likely to cause excessive contact stress on the grinding wheel, and even cause the grinding wheel to break. At the same time, the radial runout accuracy after the grinding wheel is installed cannot be adjusted at all, which seriously restricts the gear tooth surface machining quality. Summary of the Invention

[0004] The problem solved by this invention is that the existing grinding wheel installation method is prone to causing excessive contact stress on the grinding wheel, and may even lead to the grinding wheel breaking. At the same time, the radial runout accuracy after the grinding wheel is installed cannot be adjusted at all, which seriously restricts the gear tooth surface machining quality.

[0005] To solve the above problems, the present invention provides a honing machine grinding wheel shaft device and adjustment method.

[0006] In a first aspect, the present invention provides a honing machine grinding wheel shaft device, comprising: The spindle has a grinding wheel mounting section; An annular elastic expansion member is sleeved inside the grinding wheel mounting section. Both ends of the annular elastic expansion member are sealed and fixed to the spindle to form a fully connected annular pressure cavity between the outer circumferential surface of the annular elastic expansion member and the inner circumferential surface of the spindle. The annular pressure cavity is used to inject pressure transmission medium, and the inner circumferential surface of the annular elastic expansion member is used to mount the grinding wheel. Multiple pressure regulating elements are arranged at circumferential intervals along the annular pressure chamber. Each pressure regulating element is mounted on the main shaft to change the pressure in the corresponding circumferential region of the annular pressure chamber, thereby driving the annular elastic expansion member to generate radial deformation in the corresponding region.

[0007] Preferably, the pressure regulating member includes a linearly feedable pressure-applying end that extends into the annular pressure chamber to directly compress the pressure transmission medium.

[0008] Preferably, the spindle has an axial hole that communicates with the annular pressure chamber. The pressure regulating component also includes a drive unit connected to the pressure-applying end. The drive unit and the axial hole are connected by a screw fit so that the rotational motion of the drive unit is converted into the linear feed of the pressure-applying end.

[0009] Preferably, a plurality of the pressure regulating elements are arranged in a circumferential array around the main shaft axis to divide the circumference of the annular pressure chamber into multiple pressure regions.

[0010] Preferably, the annular elastic expansion member is a seamless cylindrical component, and the wall thickness of the annular elastic expansion member is equal in both the circumferential and axial directions. The outer peripheral surface of the annular elastic expansion member is configured as a mounting reference surface that is directly exposed to the outside and can contact the inner bore surface of the grinding wheel.

[0011] Preferably, the two ends of the annular elastic expansion member are fixed to the main shaft by O-rings to form a seal, and an annular pressure chamber is formed between adjacent O-rings.

[0012] Preferably, the system includes a stator, a rotor, a first bearing, and a second bearing; the rotor is fixedly mounted on the main shaft, and the first bearing and the second bearing are disposed at both ends of the main shaft to support the main shaft; the stator is provided with brushes, which contact the rotor to discharge shaft current and static electricity.

[0013] In a second aspect, the present invention provides an adjustment method for adjusting the honing machine grinding wheel shaft device as described above, comprising: Drive the spindle to rotate without installing the grinding wheel, and detect the full circumferential runout of the outer circumference of the annular elastic expansion member; Based on the detected runout data, operate at least one pressure regulating component independently to change the pressure in that area to drive the annular elastic expansion component to produce radial deformation until the full circumference runout reaches the preset accuracy. Record the operating position of each pressure regulating component when the preset accuracy is achieved.

[0014] Preferably, it also includes changing the grinding wheel: Only a portion of the multiple pressure regulators are operated to retract, thereby reducing the overall pressure in the annular pressure chamber and causing the annular elastic expansion member to contract; After a new grinding wheel is installed, the pressure regulators that have been operated are reset to their respective operating positions recorded in the precision pre-adjustment step, while the positions of the remaining unoperated pressure regulators remain unchanged.

[0015] Preferably, only the two pressure regulating elements arranged 180° opposite each other are operated, while the operating positions of the remaining pressure regulating elements remain unchanged.

[0016] The beneficial effects of the honing machine grinding wheel shaft device of the present invention are as follows: By sealing and fixing the two ends of the annular elastic expansion member to the main shaft, a fully connected annular pressure chamber is formed. The pressure transmission medium injected into this chamber generates hydrostatic pressure, uniformly expanding the inner hole of the grinding wheel from the inside out. This fundamentally eliminates the problems of uneven circumferential deformation and local stress concentration caused by the rigid conical surface forced displacement of traditional mechanical tapered sleeves, thus effectively preventing the grinding wheel from cracking due to excessive contact stress. Simultaneously, multiple pressure regulating components arranged at intervals along the circumference of the annular pressure chamber and operating independently can differentially adjust the pressure in different circumferential areas within the chamber. This drives the corresponding parts of the annular elastic expansion member to produce different degrees of radial deformation, thereby actively correcting the radial runout error of the grinding wheel. This overcomes the shortcomings of existing installation methods that rely entirely on the manufacturing precision of parts and lack precision feedback and active adjustment mechanisms. The combined effect of these structures significantly improves the installation accuracy and adjustability of the grinding wheel while ensuring the safety of the grinding wheel clamping, ultimately guaranteeing the machining quality of the gear tooth surface. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the honing machine grinding wheel shaft device of the present invention; Figure 2 for Figure 1 Front view schematic diagram of the structure shown; Figure 3 for Figure 2 The structure shown is a cross-sectional view along line B-B. Figure 4 for Figure 3 A magnified view of the structure shown at point A.

[0018] Explanation of reference numerals in the attached figures: 1. Spindle; 2. Grinding wheel mounting section; 3. Annular elastic expansion element; 4. Annular pressure chamber; 5. Pressure regulating element; 6. Pressure application end; 7. Drive unit; 8. Stator coil; 9. Rotor; 10. First bearing; 11. Second bearing; 13. Stator housing; 14. Mounting flange; 15. O-ring seal; 16. Stepped bushing; 17. Fasteners. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0020] Where terminology is involved, the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0021] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0022] In related technologies, the tightening principle of mechanical tapered sleeves relies on the forced displacement of rigid tapered surfaces. The radial deformation is unevenly distributed along the circumference, which inevitably leads to local stress concentration. The entire installation process relies solely on the manufacturing precision of the parts themselves, lacking any precision feedback and active adjustment mechanism. Even if runout is detected to be out of tolerance, it cannot be corrected during the clamping process.

[0023] Example 1 To address the problems existing in the aforementioned related technologies, this embodiment provides a honing machine grinding wheel shaft device. This device is applied in a honing machine, specifically a direct-drive honing machine used in the post-heat honing process of high-speed gears in new energy vehicles, to realize the clamping and tightening of the grinding wheel on the spindle 1. Figures 1 to 4 As shown, the grinding wheel shaft assembly includes a main shaft 1, an annular elastic expansion member 3, and multiple pressure adjusting members 5.

[0024] The spindle 1 has a grinding wheel mounting section 2, which is a shaft section on the spindle 1 used to support the grinding wheel and the tensioning structure.

[0025] An annular elastic expansion member 3 is fitted inside the grinding wheel mounting section 2. This annular elastic expansion member 3 is made of a material capable of elastic deformation and can expand radially when subjected to an outward force. Both ends of the annular elastic expansion member 3 are sealed and fixed to the main shaft 1, forming a continuous annular pressure chamber 4 between the outer circumferential surface of the annular elastic expansion member 3 and the inner circumferential surface of the main shaft 1. "Continuous annular pressure chamber" means that the annular pressure chamber is an unobstructed, continuous space along the circumference, allowing the pressure transmission medium to flow freely throughout the entire circumference; "sealed and fixed" ensures the airtightness of the annular pressure chamber, preventing leakage of the internal medium. Based on this structure, when the annular pressure chamber 4 is filled with the pressure transmission medium and a base pressure is established, the pressure in all circumferential directions tends to be equal, thereby generating uniform radial pressure on the inner circumferential surface of the annular elastic expansion member 3. This results in a uniform circumferential distribution of the initial expansion force, effectively avoiding localized stress concentration.

[0026] The annular pressure chamber 4 is used to inject a pressure transmission medium. The pressure transmission medium is a fluid medium used to transmit pressure within the annular pressure chamber; in this embodiment, low-compressibility hydraulic oil with air removed is preferably used as the pressure transmission medium. In operation, the pressure transmission medium is enclosed within the annular pressure chamber, uniformly applying pressure to the inner circumferential surface of the annular elastic expansion member 3.

[0027] The inner circumferential surface of the annular elastic expansion member 3 is used to mount the grinding wheel. The grinding wheel is fitted onto the inner circumferential surface of the annular elastic expansion member 3 through its inner hole; when the annular elastic expansion member 3 expands outward under the action of the pressure transmission medium, its inner circumferential surface presses against the inner hole of the grinding wheel, thereby achieving the expansion and fixation of the grinding wheel. Compared with the forced displacement of the rigid tapered sleeve, this fluid pressure expansion method avoids the local high stress caused by mechanical extrusion and reduces the risk of grinding wheel breakage.

[0028] Multiple pressure regulating components 5 are arranged circumferentially around the annular pressure chamber. Each pressure regulating component 5 is mounted on the spindle 1 and can operate independently to change the pressure in the corresponding circumferential region within the annular pressure chamber 4, thereby driving the annular elastic expansion member 3 to produce radial deformation in the corresponding region. Specifically, each pressure regulating component 5 can apply or release force to the pressure transmission medium in its circumferential region, fine-tuning the pressure in that region. Since each pressure regulating component 5 is independent, it can form differentiated pressure distributions in different circumferential regions, thereby driving the corresponding part of the annular elastic expansion member 3 to produce radial deformation of different degrees, locally pushing the grinding wheel, thus achieving active correction of the radial runout error of the grinding wheel.

[0029] Through the above-described configuration, the honing machine grinding wheel shaft device provided in this embodiment, on the one hand, utilizes the fully connected annular pressure chamber 4 to contain the pressure transmission medium, tightening the grinding wheel through hydrostatic pressure, ensuring uniform circumferential pressure transmission, eliminating the stress concentration phenomenon caused by rigid forced displacement in traditional mechanical tapered sleeves, and effectively preventing grinding wheel breakage; on the other hand, by using multiple pressure regulating components 5 arranged and operated at intervals along the circumference, the pressure in different circumferential areas within the annular pressure chamber 4 can be differentially adjusted, thereby controlling the radial deformation of the annular elastic tightening component 3 at various angular positions, and achieving active correction of the radial runout accuracy of the grinding wheel during the clamping process. Thus, this device simultaneously solves the problems of grinding wheels easily breaking due to excessive contact stress and the inability to adjust radial runout accuracy after installation in existing installation methods, ensuring the machining quality of the gear tooth surface.

[0030] As a preferred embodiment, such as Figure 4 As shown, the pressure regulating member 5 includes a pressure-applying end 6, which is configured to perform linear feed motion. The pressure-applying end 6 extends into the annular pressure chamber and is in direct contact with the pressure transmission medium within the annular pressure chamber. Since the pressure-applying end 6 directly acts on the pressure transmission medium, when it feeds linearly toward the interior of the annular pressure chamber, it compresses the pressure transmission medium in its circumferential region, causing the pressure in that region to increase; conversely, when the pressure-applying end 6 retracts, the pressure in that region decreases. By directly changing the volume of the chamber through the linear displacement of the pressure-applying end 6, the pressure in the corresponding circumferential region can be sensitively and accurately controlled, thereby driving the annular elastic expansion member 3 to produce more precise radial deformation in that region.

[0031] Furthermore, such as Figure 4 As shown, the pressure regulating component 5 also includes a drive unit 7, which is connected to the pressure-applying end 6. The main shaft 1 has an axial hole at a corresponding position, which communicates with the annular pressure chamber. The drive unit 7 and the axial hole are connected by a screw fit, allowing the rotational motion of the drive unit 7 to be converted into linear feed of the pressure-applying end 6. For example, the outer circumference of the drive unit 7 has an external thread, and the wall of the axial hole has a matching internal thread, or a nut structure is provided. When the operator rotates the drive unit 7, the angular displacement is precisely converted into the axial linear displacement of the pressure-applying end 6 through the thread lead. This screw fit not only achieves the conversion of motion mode, but also, due to the self-locking characteristic of the thread itself, maintains the axial position of the pressure-applying end 6 after adjustment, thereby maintaining the pressure value of the target pressure area and preventing pressure drift due to vibration or other reasons.

[0032] In a preferred embodiment, regarding the control of adjustment precision, the operating end of the pressure regulating member 5 and the pressure transmission medium are configured to have a fixed motion transmission ratio. The operating end refers to the part where the operator applies the adjustment action, such as the screwing end of the drive unit 7. The fixed motion transmission ratio means that there exists a definite and repeatable correspondence between the quantitative operation input from the operating end (such as rotating a specific angle), the linear displacement of the pressure-applying end 6, the pressure change within the annular pressure chamber, and finally the radial displacement of the annular elastic expansion member 3. One implementation involves pre-calculating the radial deformation of the annular elastic expansion member 3 caused by a unit rotation angle by selecting the thread lead and the effective area of ​​the pressure-applying end 6. This configuration ensures that each quantitative operation by the operator corresponds to a predictable radial displacement of the annular elastic expansion member 3. Therefore, when correcting the radial runout of the grinding wheel, the operator can precisely and quantitatively operate the pressure regulating member 5 in the corresponding direction based on the measured runout data, achieving precise compensation for runout errors without repeated trial and error.

[0033] In a preferred embodiment, multiple pressure regulating elements 5 are arranged in a circumferential array around the axis of the main shaft 1, thereby dividing the circumference of the annular pressure chamber into multiple pressure zones. Since each pressure zone corresponds to a pressure regulating element 5, the operator adjusts the pressure in each zone. The circumferential array distribution ensures that each pressure regulating element 5 is symmetrical in the circumferential orientation, and each controllable pressure zone evenly covers the entire circumference of the grinding wheel's inner hole. This allows for independent and uniform correction of the radial runout component of the grinding wheel in each angular direction. In this embodiment, a total of 12 pressure regulating elements are provided, arranged at equal angles of 30° along the circumference, which can cover the entire circumference without adjustment blind spots. Depending on the requirements of different main shaft specifications, the number of pressure regulating elements can be selected within the range of 8 to 16, thereby improving the overall clamping accuracy of the grinding wheel shaft device.

[0034] As a preferred embodiment, such as Figure 1 As shown, the annular elastic expansion member 3 is a seamless cylindrical component with equal wall thickness in both the circumferential and axial directions. Seamless means that there are no welded seams or joints in the circumferential direction, and its material structure remains continuous in the circumferential direction, thus avoiding stress concentration or discontinuous deformation at the joints under pressure. Equal wall thickness in both the circumferential and axial directions ensures that the annular elastic expansion member 3 has consistent bending and radial stiffness at all locations. Based on this structure, when the pressure transmission medium in the annular pressure chamber builds up pressure, the uniform internal pressure acts on the seamless inner wall of the cylinder with equal wall thickness, driving the annular elastic expansion member 3 to produce a radial expansion with consistent height in both the circumferential and axial directions. This allows the expansion force to be uniformly applied to the inner hole of the grinding wheel, further eliminating local contact stress caused by differences in the stiffness of the expansion member itself, and improving the alignment and stability of the grinding wheel after expansion.

[0035] In a preferred embodiment, the inner circumferential surface of the annular elastic expansion member 3 is configured as a mounting reference surface directly exposed to the outside and in contact with the inner bore surface of the grinding wheel. That is, the inner circumferential surface of the annular elastic expansion member 3 serves directly as the mounting and positioning surface of the grinding wheel without passing through an intermediate bushing or other adapter. The grinding wheel is directly fitted onto this inner circumferential surface through its inner bore, and the expansion force is directly transmitted to the grinding wheel via this reference surface, reducing the accumulation of intermediate errors during assembly. Since the inner circumferential surface itself is the deformation surface of the annular elastic expansion member 3, its radial displacement is directly converted into pressing and pushing against the inner bore of the grinding wheel. The corrective displacement brought about by adjusting the pressure adjusting member 5 can act on the grinding wheel without loss, thereby ensuring the sensitivity and accuracy of the radial runout adjustment of the grinding wheel.

[0036] Regarding the fixing and sealing method of the two ends of the annular elastic expansion member 3 in this embodiment, the two ends of the annular elastic expansion member 3 are fixed to the main shaft 1 and sealed by O-rings 15. Figure 4 As shown, sealing and fixing are achieved by setting O-rings 15 to meet the processing requirements of different batches. An annular pressure chamber 4 is formed between the two O-rings 15.

[0037] In a preferred embodiment, a stepped bushing 16 is also provided on the main shaft 1, and a fastener 17 is provided inside the stepped bushing 16. One end of the fastener 17 passes through the stepped bushing 16 and is fixedly connected to the annular elastic expansion member 3, which further enhances the stable connection of the annular elastic expansion member 3.

[0038] As a preferred embodiment, such as Figure 3 and Figure 4 As shown, the honing machine grinding wheel shaft device of this embodiment also includes a stator, a rotor 9, a first bearing 10 and a second bearing 11. The stator includes a stator housing 13 and a stator coil 8. Mounting flanges 14 are provided at both ends of the stator housing 13. The entire device is mounted on the honing machine slide through the mounting flanges 14.

[0039] The rotor 9 is fixedly mounted on the spindle 1. As the direct drive component of the spindle 1, when the stator is energized and generates a rotating magnetic field, the rotor 9 is subjected to electromagnetic force and drives the spindle 1 to rotate together, realizing the main motion input of the grinding wheel cutting motion.

[0040] The first bearing 10 and the second bearing 11 are disposed at both ends of the spindle 1 to support the spindle 1. The first bearing 10 and the second bearing 11 bear the radial load and axial load transmitted from both ends of the spindle 1, respectively. The first bearing and the second bearing are high-speed ceramic ball bearings with insulation properties, which can meet the high-speed rotation requirements of up to 10,000 rpm. This ensures that the spindle 1 can maintain a high-precision rotation axis when the grinding wheel is clamped in the grinding wheel mounting section 2 and the cutting torque is transmitted, thereby reducing the deflection and vibration of the spindle 1 and providing a stable rotational foundation for the precision tightening and runout correction of the grinding wheel.

[0041] Furthermore, brushes are provided on the stator, and the brushes contact the rotor 9 to discharge shaft current and static electricity. It should be noted that although the brushes are not shown in the accompanying drawings, those skilled in the art can implement them based on the textual description in the specification. During motor operation, shaft current may be induced on the main shaft 1 due to factors such as magnetic circuit asymmetry and harmonics, while static electricity will also accumulate due to friction between rotating parts. The brushes maintain conductivity with the surface of the rotor 9 in a sliding contact manner. For example, the brushes can be constructed as carbon brushes or metal-graphite brushes elastically pressed onto the conductive ring surface of the rotor 9, thereby forming a low-impedance conductive path from the rotor 9 to the stator. Thus, shaft current and static electricity are continuously led to the stator and ultimately released through the grounding path, preventing spark discharge between the rolling elements and raceways of the bearings, preventing bearing electrolytic erosion failure, and preventing electrolytic degradation of the annular elastic clamping element or pressure transmission medium caused by shaft current conduction through the grinding wheel clamping structure.

[0042] Example 2 This embodiment provides an adjustment method for adjusting the honing machine grinding wheel shaft device described in Embodiment 1.

[0043] First, with the grinding wheel not installed, the spindle 1 is driven to rotate, and the full circumferential runout of the outer circumferential surface of the annular elastic expansion member 3 is detected. The state without the grinding wheel installed means that the outer circumferential surface of the annular elastic expansion member 3 is in a free and exposed state, not constrained by the inner hole of the grinding wheel, and its shape is entirely determined by the internal pressure state and its own structure. The spindle 1 is driven to rotate, causing the annular elastic expansion member 3 to rotate with the spindle 1. During the rotation, the radial offset of the outer circumferential surface of the annular elastic expansion member 3 during the full circumferential rotation is obtained using conventional runout detection methods in the art, such as non-contact displacement sensors or contact gauges; that is, the full circumferential runout. Detecting the full circumferential runout can accurately reflect the initial shape deviation of the annular elastic expansion member 3 when it is not carrying the grinding wheel, providing precise directional and amplitude basis for subsequent pressure compensation adjustment.

[0044] Next, based on the detected runout data, at least one pressure regulating component 5 is operated independently to change the pressure in that area, thereby driving the annular elastic expansion member 3 to produce radial deformation until the full circumferential runout reaches the preset accuracy. The preset accuracy refers to the allowable runout tolerance value of the outer circumferential surface of the annular elastic expansion member 3, which is preset according to the processing requirements. After knowing the runout deviation in each circumferential direction, the operator independently adjusts the pressure regulating component 5 in the corresponding area for the runout deviation exceeding the preset accuracy; by directly squeezing the pressure transmission medium through the linear feed of the pressure regulating component 5's pressure end 6, the pressure in that area is increased, causing the corresponding local area of ​​the annular elastic expansion member 3 to produce a larger radial expansion to compensate for the negative deviation; or the pressure is reduced by retracting the pressure end 6, causing the expansion amount at that point to decrease, thereby correcting the positive deviation. Since multiple pressure regulating components 5 can be operated independently and have a fixed motion transmission ratio, the radial displacement generated by each adjustment is predictable. Therefore, the profile of the outer circumferential surface of the annular elastic expansion member 3 can be gradually corrected to the full circumferential runout within the preset accuracy range through quantitative operation.

[0045] After completing the above adjustments and achieving the preset accuracy for the full circumference runout, record the operating position of each pressure regulating component 5. The operating position of the pressure regulating component 5 refers to the relative position of the linear feed amount of its pressure-applying end 6 on each pressure regulating component 5 at the end of the adjustment process, such as the axial position of the threaded drive part 7 or the corresponding scale marking. By recording these operating positions, the high-precision profile state currently achieved by the annular elastic tensioner 3 can be solidified into a set of defined adjustment parameters. When subsequently installing the grinding wheel and performing the tensioning operation, each pressure regulating component 5 can be directly restored to the recorded operating position, allowing the annular elastic tensioner 3 to quickly reproduce the initial precision reference profile. Based on this, the grinding wheel can then be uniformly tensioned and the necessary runout fine-tuning performed.

[0046] Through the above steps, the adjustment method of this embodiment utilizes the device's ability to adjust the pressure area. Under no-load conditions, it first performs precise circumferential profile calibration on the outer periphery of the annular elastic expansion member 3, eliminating initial runout caused by manufacturing tolerances and uneven assembly stress of the expansion member. This provides a reference surface with preset accuracy for grinding wheel installation. After installing the grinding wheel, tightening based on this reference is sufficient to achieve high initial alignment accuracy. If slight runout still exists, minor compensation adjustments can be made based on the recorded position. Therefore, this method separates the calibration of the clamping reference from the correction of the grinding wheel's radial runout, systematically improving the clamping accuracy and adjustment efficiency of the honing machine's grinding wheel shaft device, ultimately ensuring the machining quality of the gear tooth surface.

[0047] As a preferred embodiment, the following steps can be performed when changing the grinding wheel: Only a portion of the multiple pressure regulating elements 5 are operated to retract, thereby reducing the overall pressure in the annular pressure chamber and causing the annular elastic expansion element 3 to contract. Here, "retracting" refers to operating the drive part 7 of the pressure regulating element 5, causing the pressure-applying end 6 to move away from the interior of the annular pressure chamber along its linear feed direction, thus increasing the pressure chamber volume in the corresponding circumferential region. Since the pressure transmission medium is enclosed in the annular pressure chamber 4, the increase in volume leads to a decrease in the overall pressure within the chamber. As the pressure decreases, the annular elastic expansion element 3 undergoes radial contraction under the action of its own material elastic restoring force, reducing its outer diameter and thus disengaging from the inner bore surface of the currently mounted grinding wheel, allowing the grinding wheel to be easily removed.

[0048] After a new grinding wheel is installed, the pressure regulating components 5 to be operated are reset to their respective operating positions recorded in the precision pre-adjustment step, while the positions of the remaining unoperated pressure regulating components 5 remain unchanged. Here, the "precision pre-adjustment step" refers to the aforementioned operating position recording step performed after detecting the full circumferential runout of the outer circumference of the annular elastic tensioner 3 without the grinding wheel installed, and independently adjusting each pressure regulating component 5 until the runout reaches the preset precision. Resetting the pressure regulating component 5 to be operated means operating the drive unit 7 to move the pressure-applying end 6 back to the recorded position, restoring the originally set volume and pressure of that area. Since the positions of the remaining unoperated pressure regulating components 5 remain unchanged throughout the entire process of disassembling and installing the new grinding wheel, the state of the pressure area they control is completely preserved. Therefore, when the pressure regulating component 5 to be operated is reset, the pressure distribution in each area of ​​the annular pressure chamber is completely reproduced to the state at the precision pre-adjustment, and the outer circumferential profile of the annular elastic tensioner 3 accurately reaches the reference of the preset precision. After the new grinding wheel is installed, a high-precision tension reference that has been pre-calibrated is obtained directly, eliminating the need for full-circumference runout testing and overall readjustment, which greatly improves the efficiency of sand changing and clamping repeatability.

[0049] Furthermore, during the aforementioned grinding wheel replacement process, only the two pressure regulating components 5 arranged 180° opposite each other are operated, while the operating positions of the remaining pressure regulating components 5 remain unchanged. The 180° opposite arrangement means that these two pressure regulating components 5 are located at opposite ends of the same diameter line within a section perpendicular to the axis of the main shaft 1. By retracting only these two opposing pressure regulating components 5, the overall pressure of the annular pressure chamber can be symmetrically reduced with minimal adjustment operations, thereby driving the annular elastic expansion member 3 to contract uniformly in the circumferential direction, effectively avoiding the potential for skewness or uneven deformation of the expansion member due to unilateral pressure release. After inserting the new grinding wheel, resetting these two pressure regulating components 5 to the recording position also allows for a rapid and symmetrical restoration of the full circumferential expansion state, maintaining the previously established runout correction accuracy, and further simplifying the operation process.

[0050] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A honing machine grinding wheel shaft device, characterized in that, include: The main spindle (1) has a grinding wheel mounting section (2); An annular elastic expansion member (3) is sleeved inside the grinding wheel mounting section (2). The two ends of the annular elastic expansion member (3) are sealed and fixed to the main shaft (1) to form an annular pressure cavity (4) that is connected in a complete circle between the outer circumferential surface of the annular elastic expansion member (3) and the inner circumferential surface of the main shaft (1). The annular pressure cavity (4) is used to inject pressure transmission medium, and the inner circumferential surface of the annular elastic expansion member (3) is used to install the grinding wheel. Multiple pressure regulating components (5) are arranged circumferentially around the annular pressure chamber (4). Each pressure regulating component (5) is mounted on the main shaft (1) to change the pressure in the corresponding circumferential region of the annular pressure chamber (4), thereby driving the annular elastic expansion member (3) to generate radial deformation in the corresponding region. The pressure regulating component (5) includes a linearly feedable pressure end (6) that extends into the annular pressure chamber (4) to directly squeeze the pressure transmission medium. An axial hole is provided on the main shaft (1) and is connected to the annular pressure chamber (4). The pressure regulating component (5) also includes a drive part (7) connected to the pressure end (6). The drive part (7) and the axial hole are connected by a screw fit so that the rotational motion of the drive part (7) is converted into the linear feed of the pressure end (6).

2. The honing machine grinding wheel shaft device according to claim 1, characterized in that, Multiple pressure regulating elements (5) are arranged in a circumferential array around the axis of the main shaft (1) to divide the circumference of the annular pressure chamber (4) into multiple pressure regions.

3. The honing machine grinding wheel shaft device according to any one of claims 1-2, characterized in that, The annular elastic expansion member (3) is a seamless cylindrical component, and the wall thickness of the annular elastic expansion member (3) is equal in both the circumferential and axial directions. The outer peripheral surface of the annular elastic expansion member (3) is configured as an installation reference surface that is directly exposed to the outside and can contact the inner hole surface of the grinding wheel.

4. The honing machine grinding wheel shaft device according to any one of claims 1-2, characterized in that, The two ends of the annular elastic expansion member (3) are fixed to the main shaft (1) by O-rings (15) and form a seal. An annular pressure chamber (4) is formed between adjacent O-rings (15).

5. The honing machine grinding wheel shaft device according to any one of claims 1-2, characterized in that, It includes a stator, a rotor (9), a first bearing (10) and a second bearing (11); the rotor (9) is fixedly mounted on the main shaft (1), and the first bearing (10) and the second bearing (11) are disposed at both ends of the main shaft (1) to support the main shaft (1); the stator is provided with brushes, which contact the rotor (9) to discharge shaft current and static electricity.

6. An adjustment method, characterized in that, The gear honing machine grinding wheel shaft device according to any one of claims 1-5 comprises: Drive the spindle (1) to rotate without the grinding wheel installed, and detect the full circumferential runout of the outer circumference of the annular elastic expansion member (3); Based on the detected runout data, at least one pressure regulating element (5) is operated independently to change the pressure in the area to drive the annular elastic expansion element (3) to produce radial deformation until the full circumference runout reaches the preset accuracy. Record the operating position of each of the pressure regulating components (5) when the preset accuracy is achieved.

7. The adjustment method according to claim 6, characterized in that, This also includes when changing the grinding wheel: Only a portion of the multiple pressure regulators (5) are operated to retract, thereby reducing the overall pressure of the annular pressure chamber (4) and causing the annular elastic expansion member (3) to contract; After a new grinding wheel is installed, the pressure regulators (5) that are to be operated are reset to their respective operating positions recorded in the precision pre-adjustment step, while the positions of the remaining pressure regulators (5) that are not operated remain unchanged.

8. The adjustment method according to claim 7, characterized in that, Only the two pressure regulating elements (5) arranged 180° opposite each other are operated, while the operating positions of the other pressure regulating elements (5) remain unchanged.

Images