Ceramic CBN internal grinding wheel with diamond disc roller

Abstract

This utility model discloses a diamond disc roller specifically for ceramic CBN internal grinding wheels, relating to the field of diamond disc roller technology. Its key technical features include a roller base, a flange, a diamond disc body, a positioning ring, a disc retaining ring, locking bolts, and a positioning pin. The roller base is a cylindrical hollow structure with a disc mounting groove at one end. In use, this utility model achieves dedicated positioning for the flange and roller base through the cooperation of the positioning groove and the positioning pin, significantly reducing coaxiality deviation and minimizing radial runout of the roller during dressing. This meets the high-precision forming requirements of ceramic CBN grinding wheels. Furthermore, the disc retaining ring securely fixes the disc with locking bolts to prevent displacement, and the heat dissipation holes accelerate heat dissipation, slowing down diamond abrasive wear, extending tool life, and overall improving dressing stability and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of diamond disc roller technology, specifically a diamond disc roller for ceramic CBN inner grinding wheel. Background Technology

[0002] Ceramic CBN internal grinding wheels are widely used in grinding high-precision parts such as automotive bearing inner rings and engine crankshafts due to their high hardness and wear resistance. However, after long-term use, they are prone to contour deformation and abrasive dulling, requiring diamond tool dressing to maintain grinding performance.

[0003] In existing diamond disc rollers, the connection between the flange and the roller base often lacks a dedicated positioning component, which easily leads to coaxiality deviation. This results in large radial runout of the roller during dressing, making it difficult to meet the forming accuracy requirements of ceramic CBN grinding wheels. Furthermore, insufficient heat dissipation and high temperatures can easily accelerate the wear rate of diamond abrasive grains. Therefore, it is necessary to redesign a dedicated diamond disc roller for ceramic CBN internal grinding wheels to address the above problems. Utility Model Content

[0004] One technical problem to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a special diamond disc roller for ceramic CBN inner cylindrical grinding wheels, which solves the problems of large coaxiality deviation between the flange and the base of the diamond disc roller, insufficient heat dissipation, resulting in low dressing accuracy and rapid diamond wear.

[0006] Two technical solutions

[0007] To achieve the above objectives, this utility model provides the following technical solution: a special diamond disc roller for ceramic CBN internal grinding wheels, comprising a roller base, a flange, a diamond disc body, a positioning ring, a disc retaining ring, locking bolts, and positioning pins. The roller base is a cylindrical hollow structure. One end of the roller base has a disc mounting groove, and the flange is coaxially fixed to the other end face of the roller base. The positioning ring is coaxially embedded in the disc mounting groove, and the diamond disc body is attached to the end face of the positioning ring away from the bottom of the disc mounting groove. The disc retaining ring is threadedly connected to the roller base by multiple locking bolts, and the disc retaining ring abuts against the diamond disc body. Multiple positioning grooves are provided on the end faces of both the flange and the roller base, and each positioning pin is installed in the corresponding positioning groove. Multiple heat dissipation holes are provided on the side wall of the roller base.

[0008] Preferably, multiple reinforcing ribs are equidistantly installed on the outer circumferential surface of the roller base, and each reinforcing rib is integrally formed with the roller base, and the multiple heat dissipation holes are evenly distributed along the circumferential direction of the roller base.

[0009] Preferably, a fine-tuning shim is provided between the disc pressure ring and the diamond disc body, and the thickness of the fine-tuning shim is 0.05-0.2mm, and the material of the fine-tuning shim is phosphor bronze.

[0010] Preferably, a shock-absorbing pad is provided between the disc pressure ring and the roller base, and the shock-absorbing pad is made of nitrile rubber and has a thickness of 0.5-1mm.

[0011] Preferably, a sealing ring is provided at the end of the flange away from the roller base, and a temperature sensor is embedded at the end of the roller base near the diamond disc body. The temperature sensor is covered with a protective sleeve made of stainless steel.

[0012] Preferably, the outer surface of the roller substrate is coated with a hard alloy coating, and the coating material is WC-Co alloy.

[0013] Three beneficial effects

[0014] Compared with the prior art, this utility model provides a special diamond disc roller for ceramic CBN inner grinding wheels, which has the following beneficial effects:

[0015] 1. This utility model, through devices such as positioning grooves, positioning pins, heat dissipation holes, positioning rings, and disc pressure rings, achieves dedicated positioning for the flange and roller base by cooperating with positioning grooves and positioning pins, significantly reducing coaxiality deviation, reducing radial runout of the roller during dressing, meeting the high-precision forming requirements of ceramic CBN grinding wheels, and the disc pressure ring securely fixes the disc with locking bolts to prevent displacement, while the heat dissipation holes accelerate heat dissipation, slow down the wear of diamond abrasive grains, extend tool life, and improve overall dressing stability and accuracy.

[0016] 2. This utility model, through devices such as reinforcing ribs, fine-tuning shims, shock-absorbing shims, sealing rings, and temperature sensors, achieves the following: reinforcing ribs, integrally formed with the roller base, enhance the rigidity of the base and resist deformation and vibration during high-speed rotation; fine-tuning shims precisely compensate for assembly gaps and adjust the parallelism of the diamond disc body, further improving dressing accuracy; shock-absorbing shims absorb vibrations and prevent disc misalignment; sealing rings prevent dust from entering the connection gaps; temperature sensors monitor temperature in real time; and protective sleeves prevent corrosion, reducing maintenance frequency, adapting to automated continuous operation, and comprehensively optimizing tool performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the special diamond disc roller for ceramic CBN inner grinding wheel proposed in this utility model;

[0018] Figure 2 This is an exploded view of the shock-absorbing pads and fine-tuning pads for the special diamond disc rollers for ceramic CBN inner grinding wheels proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the positioning pin and positioning groove structure of the special diamond disc roller for ceramic CBN inner grinding wheel proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the installation structure of the temperature sensor for the diamond disc roller of the ceramic CBN inner grinding wheel proposed in this utility model.

[0021] In the diagram: 1. Roller base; 2. Flange; 3. Reinforcing rib; 4. Heat dissipation hole; 5. Diamond disc body; 6. Disc mounting slot; 7. Positioning ring; 8. Shock-absorbing pad; 9. Fine-tuning shim; 10. Disc pressure ring; 11. Locking bolt; 12. Sealing ring; 13. Positioning pin; 14. Positioning groove; 15. Protective sleeve; 16. Temperature sensor. Detailed Implementation

[0022] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0023] This utility model provides a technical solution for a diamond disc roller specifically designed for ceramic CBN internal grinding wheels:

[0024] Please see Figures 1-4 A special diamond disc roller for ceramic CBN internal grinding wheel includes a roller base 1, a flange 2, a diamond disc body 5, a positioning ring 7, a disc pressure ring 10, locking bolts 11 and positioning pins 13. The roller base 1 is a cylindrical hollow structure. One end of the roller base 1 is provided with a disc mounting groove 6, and the flange 2 is coaxially fixed to the other end face of the roller base 1. The positioning ring 7 is coaxially embedded in the disc mounting groove 6, and the diamond disc body 5 is attached to the end face of the positioning ring 7 away from the bottom of the disc mounting groove 6. The disc pressure ring 10 is threadedly connected to the roller base 1 by multiple locking bolts 11, and the disc pressure ring 10 abuts against the diamond disc body 5. Multiple positioning grooves 14 are provided on the end faces of both the flange 2 and the roller base 1, and each positioning pin 13 is installed in the corresponding positioning groove 14. Multiple heat dissipation holes 4 are provided on the side wall of the roller base 1.

[0025] It should be noted that after the positioning ring 7 is installed, it limits the radial position of the diamond disc body 5. The disc pressure ring 10 is directly connected to the roller base 1 through the locking bolt 11 to prevent the positioning ring 7 from breaking under stress. At the same time, the positioning groove 14 and the positioning pin 13 ensure that the flange 2 and the roller base 1 are coaxial. The heat dissipation hole 4 can dissipate the heat during the dressing process. This can achieve high-precision coaxiality of each component, reduce the offset of the diamond disc body 5, and allow the heat to be discharged in time, thus extending the service life of the diamond disc body 5 and ensuring the grinding wheel forming accuracy.

[0026] Furthermore, multiple reinforcing ribs 3 are equidistantly installed on the outer circumference of the roller base 1, and each reinforcing rib 3 is integrally formed with the roller base 1. Multiple heat dissipation holes 4 are evenly distributed along the circumference of the roller base 1.

[0027] The reinforcing ribs 3 are evenly distributed around the circumference and integrally formed with the roller base 1, which can maximize the rigidity of the base and avoid deformation during high-speed rotation. In addition, the heat dissipation holes 4 are evenly opened along the circumference of the base, which can form an annular airflow channel and improve heat dissipation efficiency.

[0028] Furthermore, a fine-tuning shim 9 is provided between the disc pressure ring 10 and the diamond disc body 5, and the thickness of the fine-tuning shim 9 is 0.05-0.2mm, and the material of the fine-tuning shim 9 is phosphor bronze.

[0029] The parallelism error of the diamond disc body can be precisely adjusted by the fine-tuning shim 9, which solves the trimming profile deviation caused by assembly gap. The wear-resistant properties of phosphor bronze mean that the shim does not need to be replaced frequently, reducing maintenance costs.

[0030] Furthermore, a shock-absorbing pad 8 is provided between the disc pressure ring 10 and the roller base 1, and the shock-absorbing pad 8 is made of nitrile rubber and has a thickness of 0.5-1mm.

[0031] It can effectively reduce vibration transmission, prevent the diamond disc body 5 from shifting due to vibration, avoid contour defects of the grinding wheel, and the nitrile rubber is resistant to the corrosion of the abrasive cutting fluid, thus extending the life of the damping pad 8. At the same time, it reduces the damage of vibration to the roller base 1 and maintains stable precision.

[0032] Furthermore, a sealing ring 12 is provided at the end of the flange 2 away from the roller base 1, and a temperature sensor 16 is embedded at the end of the roller base 1 near the diamond disc body 5. A protective sleeve 15 is provided on the outside of the temperature sensor 16, and the protective sleeve 15 is made of stainless steel.

[0033] The sealing ring 12 can prevent the connection from loosening due to dust and ensure coaxiality stability. At the same time, the temperature sensor 16 monitors the dressing temperature in real time. When the temperature exceeds the threshold, the grinding machine can automatically adjust to prevent the diamond disc body 5 from overheating and wearing. The protective sleeve 15 extends the sensor life and prevents corrosion from the grinding fluid.

[0034] Furthermore, the outer surface of the roller substrate 1 is plated with a hard alloy coating, and the coating material is WC-Co alloy. This material has high hardness and strong wear resistance, and can form a protective layer on the surface of the roller substrate 1 to resist dust erosion and slight collisions during the grinding process, extend the overall life of the roller substrate 1, and avoid positioning deviation caused by wear of the roller substrate 1.

[0035] In practical use, the working principle of this utility model is as follows:

[0036] First, the device is connected to the grinding machine dressing device through the flange 2. The sealing ring 12 at the end of the flange 2 fits tightly against the grinding machine connection surface to prevent metal dust and grinding fluid generated during grinding operations from entering the connection gap, thus avoiding loosening of the connection due to dust accumulation after long-term use. At the same time, the cooperation between the positioning groove 14 and the positioning pin 13 ensures that the roller base 1 and the grinding machine spindle remain coaxial, preventing radial displacement during high-speed rotation.

[0037] After the grinding machine is started, the device rotates synchronously with the grinding machine spindle. The reinforcing ribs 3 on the outer circumference of the roller base 1 are integrally formed with the base, which can effectively resist the centrifugal force and dressing vibration during the rotation process, and avoid the deformation of the base from affecting the dressing accuracy. At this time, the diamond disc body 5 is precisely in contact with the inner wall of the ceramic CBN inner cylindrical grinding wheel to be dressed, and the grinding wheel is cut and dressed by the diamond particles on the disc surface.

[0038] During the dressing process, the heat dissipation holes 4 on the side wall of the roller base 1 form an annular airflow channel to quickly dissipate the heat generated by cutting and prevent the diamond disc body 5 from being worn more severely due to high temperature.

[0039] Meanwhile, the temperature sensor 16 on the roller base 1 monitors the ambient temperature in real time. If the temperature approaches the threshold, the grinding machine can automatically adjust the feed speed. The stainless steel protective sleeve 15 prevents the grinding fluid from corroding the sensor.

[0040] During this process, the damping pad 8 between the disc pressure ring 10 and the roller base 1 absorbs the high-frequency vibration generated by the contact between the grinding wheel and the disc, preventing the diamond disc body 5 from shifting. Meanwhile, the assembly gap compensated by the fine-tuning pad 9 ensures the parallelism of the disc, making the grinding wheel profile accuracy stable after dressing, and meeting the grinding requirements of high-precision parts.

[0041] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A special diamond disc roller for ceramic CBN inner grinding wheel, comprising a roller base (1), a flange (2), a diamond disc body (5), a positioning ring (7), a disc pressure ring (10), a locking bolt (11), and a positioning pin (13), characterized in that, The roller base (1) is a cylindrical hollow structure. One end of the roller base (1) is provided with a disc mounting groove (6), and the other end face of the roller base (1) is coaxially fixed with a flange (2). The positioning ring (7) is coaxially embedded in the disc mounting groove (6), and the diamond disc body (5) is attached to the end face of the positioning ring (7) away from the bottom of the disc mounting groove (6). The disc pressure ring (10) is threadedly connected to the roller base (1) by multiple locking bolts (11), and the disc pressure ring (10) abuts against the diamond disc body (5). The flange (2) and the end face of the roller base (1) are both provided with multiple positioning grooves (14), and each positioning pin (13) is installed in the corresponding positioning groove (14). The side wall of the roller base (1) is provided with multiple heat dissipation holes (4).

2. The diamond disc roller for ceramic CBN inner grinding wheel of claim 1, wherein, The roller base (1) has multiple reinforcing ribs (3) installed at equal intervals on its outer circumference, and each reinforcing rib (3) is integrally formed with the roller base (1). The multiple heat dissipation holes (4) are evenly distributed along the circumference of the roller base (1).

3. The diamond disc roller for ceramic CBN inner grinding wheel of claim 2, wherein, A fine-tuning shim (9) is provided between the disc pressure ring (10) and the diamond disc body (5), and the thickness of the fine-tuning shim (9) is 0.05-0.2mm, and the material of the fine-tuning shim (9) is phosphor bronze.

4. The diamond disc roller for ceramic CBN inner grinding wheel of claim 3, wherein, A shock-absorbing pad (8) is provided between the disc pressure ring (10) and the roller base (1), and the shock-absorbing pad (8) is made of nitrile rubber and has a thickness of 0.5-1mm.

5. The diamond disc roller for ceramic CBN inner grinding wheel of claim 4, wherein, The flange (2) is provided with a sealing ring (12) at the end away from the roller base (1). The roller base (1) is provided with a temperature sensor (16) at the end near the diamond disc body (5). The temperature sensor (16) is covered with a protective sleeve (15), and the protective sleeve (15) is made of stainless steel.

6. The ceramic CBN inner grinding wheel dedicated diamond disc roller according to claim 5, characterized in that, The outer surface of the roller substrate (1) is coated with a hard alloy coating, and the coating material is WC-Co alloy.

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