Grinding clamp and grinding method

Abstract

The application belongs to the technical field of optical fiber device manufacturing and precision machining, and discloses a grinding clamp and a grinding method. The grinding clamp comprises a base, a boss, a supporting seat, a counterweight and a balance structure. The boss is detachably installed on the base, and the supporting seat is detachably installed on the boss. The outer circumferential surface of the supporting seat is provided with a plurality of receiving grooves, the receiving grooves are uniformly distributed along the circumference of the supporting seat, the receiving grooves penetrate the upper surface and the lower surface of the supporting seat, the groove depth of the receiving grooves gradually decreases from top to bottom, the groove bottom surface of the receiving grooves and the upper surface of the base are arranged at an angle, the groove bottom surface of the receiving grooves is used for fixing an optical waveguide chip, the bottom end of the optical waveguide chip can abut on the base, the counterweight is arranged on the upper surface of the supporting seat, and the balance structure is arranged on the upper surface of the counterweight. The grinding method is completed by using the above grinding equipment. The compatibility and process adaptability of the grinding clamp are improved, and the grinding precision is also improved.

Description

Technical Field

[0001] This invention relates to the field of fiber optic device manufacturing and precision machining technology, and in particular to a grinding fixture and grinding method. Background Technology

[0002] In the manufacturing process of optical communication devices (such as planar waveguide splitters, arrayed waveguide gratings, and fiber arrays), the end faces of the devices are typically ground and polished to achieve ultra-high smoothness and excellent perpendicularity, thereby enabling low insertion loss fiber coupling or docking. The grinding depth is a key process parameter that determines the final geometric position of the device end face, directly affecting the device's packaging performance and optical characteristics.

[0003] Traditional end-face grinding fixtures typically employ an integral design, with two main methods for controlling the grinding depth: one is to add shims of a specific thickness to the bottom of the fixture, but these shims are prone to wear and loss, and multiple shims stacked together can affect accuracy and stability; the other is to adjust the chip's protrusion height using a complex built-in fine-tuning screw mechanism. This structure is costly, cumbersome to adjust, and the screws may loosen over time, leading to accuracy drift. When production demands change and require processing chips with different grinding depths, dedicated fixtures often need to be designed and manufactured for each grinding depth. This results in long production preparation cycles, high fixture management costs, and low equipment utilization. Furthermore, during the grinding process, existing fixtures have poor balance, leading to uneven grinding pressure and defects such as end-face tilting or "collapsed edges."

[0004] Therefore, there is an urgent need for a grinding fixture and grinding method to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a grinding fixture and grinding method, which aims to solve the problems of poor compatibility and poor balance in existing grinding equipment. The grinding fixture and grinding method improve grinding compatibility and process adaptability, as well as grinding accuracy and grinding balance.

[0006] To achieve this objective, the present invention adopts the following technical solution: Grinding fixture, including: Base; A boss that can be detachably installed on the base; A support base is detachably installed on the boss. The outer circumferential surface of the support base is provided with multiple storage slots. The multiple storage slots are evenly distributed along the circumference of the support base. The storage slots penetrate the upper and lower surfaces of the support base. The depth of the storage slots gradually decreases from top to bottom. The bottom surface of the storage slot is set at an angle to the upper surface of the base. The bottom surface of the storage slot is used to fix the workpiece to be ground, and the bottom end of the workpiece to be ground can abut against the base. A counterweight is disposed on the upper surface of the support. A balancing structure is provided on the upper surface of the counterweight.

[0007] In some possible implementations, the angle θ between the bottom surface of the storage slot and the upper surface of the base is 8 degrees or 90 degrees.

[0008] In some possible implementations, the boss is cylindrical, a positioning structure is provided on the boss, the support is detachably sleeved on the positioning structure, and the bottom surface of the support abuts against the boss.

[0009] In some possible implementations, the positioning structure is configured as a positioning pin.

[0010] In some possible implementations, the workpiece to be ground is bonded to the bottom surface of the storage tank by paraffin wax, beeswax, or an adhesive.

[0011] In some possible implementations, the counterweight is cylindrical and the counterweight and the support are coaxially arranged.

[0012] In some possible implementations, the balancing structure includes an assembly plate and a plurality of balancing blocks, the plurality of balancing blocks being evenly arranged along the circumference of the assembly plate; The assembly plate is mounted to the counterweight via a support rod, and the vertical position of the assembly plate on the support rod is adjustable; or... The assembly plate is slidably mounted on the counterweight via the support rod, and the support rod and the counterweight are locked together by a locking device.

[0013] In some possible implementations, a mounting rod is provided between the balance block and the assembly plate; One end of the mounting rod is detachably connected to the assembly plate, and the other end of the mounting rod is detachably connected to the balance block; or... The balance weight is movably sleeved on the mounting rod, and a limiting screw is provided at the end of the mounting rod away from the assembly plate to prevent the balance weight from falling off the mounting rod.

[0014] In some possible implementations, the base is made of stainless steel or tool steel; the support is made of aluminum alloy.

[0015] A grinding method, using a grinding fixture as described in any of the above embodiments, the grinding method comprising the steps of: Preparation: Provide a base, a boss, a support, a counterweight, and a balancing structure as described above; Assembly and cleaning: Install the boss onto the base, clean the boss and the base, and then install the support onto the boss; Install the workpiece to be ground: Fix the workpiece to be ground to the bottom surface of the storage groove, and make the bottom end of the workpiece abut against the base; Applying counterweight: The counterweight block is placed on the upper surface of the support; Adjusting the balance: The balance structure is set on the upper surface of the counterweight to complete the assembly of the grinding fixture and make the grinding fixture have a balanced state that remains stationary in all directions; Grinding: Remove the support from the boss, place the support on the grinding disc of the grinding machine, start the grinding machine, and start grinding when the bottom end of the workpiece to be ground contacts the grinding disc. Grinding ends when the bottom surface of the support contacts the surface of the grinding disc.

[0016] The beneficial effects of this invention are: The grinding fixture provided by this invention features a detachable connection between a boss and a base. During use, the boss can be replaced with different heights according to the grinding depth required for the optical waveguide chip, simplifying operation and improving the compatibility and process adaptability of the grinding fixture. This avoids the need to manufacture dedicated fixtures for different grinding depths, reducing manufacturing costs. Furthermore, the simple structure of the boss facilitates improved accuracy in setting the grinding depth. By incorporating counterweights and a balancing structure, the center of gravity and balance of the grinding fixture are adjusted, ensuring uniform pressure on the bottom of the optical waveguide chip, thereby achieving high-precision grinding.

[0017] The grinding method provided by this invention uses the above-mentioned grinding fixture, which is easy to operate, improves the compatibility and process adaptability of the grinding fixture, avoids the need to make special fixtures for different grinding depths, and reduces manufacturing costs. By setting counterweights and balancing structures, the center of gravity and balance of the grinding fixture are adjusted, so that the bottom end of the optical waveguide chip is uniformly pressed, thereby achieving high-precision grinding. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of the grinding fixture provided in an embodiment of the present invention; Figure 2 This is an exploded view of the grinding fixture provided in an embodiment of the present invention; Figure 3 This is an assembly three-dimensional view of the base, boss, and positioning structure provided in an embodiment of the present invention; Figure 4 This is an assembly front view of the base, boss, and positioning structure provided in an embodiment of the present invention; Figure 5 This is a three-dimensional view of the support provided in an embodiment of the present invention; Figure 6This is a top view of the support provided in an embodiment of the present invention; Figure 7 yes Figure 6 Sectional view at point BB; Figure 8 This is a three-dimensional view of the workpiece to be ground being fixed to the support, provided in an embodiment of the present invention; Figure 9 This is a top view of the workpiece to be ground being fixed to the support, as provided in an embodiment of the present invention; Figure 10 yes Figure 9 Sectional view at point AA.

[0019] In the picture: 10. Optical waveguide chip; 100, Base; 200, Boss; 300, Support; 310, Storage Slot; 400, Counterweight; 510, Assembly Plate; 520, Balance Block; 530, Mounting Rod; 600, Positioning Structure; 700, Support Rod; 800, Fixing Screw; 900, Limit Screw. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] This embodiment provides a grinding fixture for fixing a workpiece to be ground, solving the problems of poor compatibility and balance in existing grinding fixtures. This embodiment uses an optical waveguide chip as an example of a workpiece to be ground.

[0025] like Figures 1 to 10 As shown, the grinding fixture includes a base 100, a boss 200, a support 300, a counterweight 400, and a balancing structure. The boss 200 is detachably mounted to the base 100, and the support 300 is detachably mounted to the boss 200. The height of the boss 200 can be set to a series of standardized dimensions, corresponding to different standard grinding depths. For example, the height of the boss 200 can be set to 0.5mm, 1.0mm, 1.5mm, etc. Exemplarily, the boss 200 can be connected to the base 100 by screws, pins, or magnetic adsorption. The outer circumferential surface of the support 300 is provided with multiple storage slots 310, which are evenly distributed along the circumference of the support 300. The storage slots 310 penetrate the upper and lower surfaces of the support 300, and their depth gradually decreases from top to bottom. The bottom surface of the storage slot 310 is angled to the upper surface of the base 100. The bottom surface of the storage slot 310 is used to fix the optical waveguide chip 10, and the bottom end of the optical waveguide chip 10 can abut against the base 100. A counterweight 400 is disposed on the upper surface of the support 300, and a balancing structure is disposed on the upper surface of the counterweight 400. Exemplarily, the counterweight 400 can be connected by screws, positioned by pins, or magnetically adsorbed onto the upper surface of the support 300.

[0026] By setting the boss 200 and the base 100 to be detachably connected, during use, the boss 200 of different heights can be replaced according to the grinding depth of the optical waveguide chip 10. The operation is simple, which improves the compatibility and process adaptability of the grinding fixture, avoids the need to make special fixtures for different grinding depths, and reduces manufacturing costs. In addition, the structure of the boss 200 is simple, which makes it easy to improve the setting accuracy of the grinding depth. By setting the counterweight 400 and the balancing structure, the center of gravity and balance of the grinding fixture can be adjusted, so that the bottom end of the optical waveguide chip 10 is evenly pressed, thereby achieving high-precision grinding.

[0027] In some embodiments, the boss 200 is cylindrical, and a positioning structure 600 is provided on the boss 200. The support 300 is detachably sleeved on the positioning structure 600, and the bottom surface of the support 300 abuts against the boss 200. The cylindrical boss 200 is simple to process, and the support 300 has good guiding properties when inserted, making assembly less prone to jamming and reducing the difficulty of assembly alignment. The positioning structure 600 is used to achieve radial limiting of the support 300, restricting the radial offset and shaking of the support 300, so as to ensure the installation position accuracy of the support 300.

[0028] Optionally, the positioning structure 600 is a positioning pin. Positioning pins are simple to process and have low manufacturing costs; the support 300 and the positioning pin have a detachable sleeve structure, making disassembly and maintenance convenient. In other embodiments, the positioning structure 600 may also be configured to include multiple protrusions, as needed.

[0029] In some embodiments, the angle θ between the bottom surface of the receiving slot 310 and the upper surface of the base 100 is 8 degrees or 90 degrees. In the manufacture of planar optical waveguide devices (such as splitters and arrayed waveguide gratings), to reduce non-Snell reflections at the end face and improve the device's return loss performance, the end face of the optical waveguide chip 10 is typically ground to form a certain angle with the horizontal plane, with 8° being the most common angle. When the angle θ between the bottom surface of the receiving slot 310 and the upper surface of the base 100 is 8 degrees, it is applied to the grinding process of the 8-degree angled end face of the optical waveguide chip 10; when the angle θ between the bottom surface of the receiving slot 310 and the upper surface of the base 100 is 90 degrees, it is applied to the grinding process of the horizontal end face of the optical waveguide chip 10. In other embodiments, the angle θ between the bottom surface of the receiving slot 310 and the upper surface of the base 100 can also be set to other values, such as 5 degrees, 15 degrees, 25 degrees, etc., as needed. For example, the error range of θ is 8 degrees ± 0.1 degrees.

[0030] In some embodiments, the optical waveguide chip 10 is bonded to the bottom surface of the receiving groove 310 using paraffin wax, beeswax, or an adhesive. By bonding the optical waveguide chip 10 to the bottom surface of the groove, the optical waveguide chip 10 and the bottom surface of the groove are tightly fitted, achieving reliable positioning of the optical waveguide chip 10 and preventing the optical waveguide chip 10 from cracking during grinding. Paraffin wax and beeswax can be removed by heating, and the adhesive can be dissolved or peeled off for demolding, making it easy to remove the optical waveguide chip 10 without damage after grinding.

[0031] Optionally, the counterweight 400 is cylindrical, and the counterweight 400 and the support 300 are coaxially arranged. This improves the stability of the grinding fixture during grinding and ensures uniform downward pressure on the optical waveguide chip 10. The size of the counterweight 400 can be adjusted according to the size of the optical waveguide chip 10 and the required pressure.

[0032] In some embodiments, the balancing structure includes an assembly plate 510 and a plurality of balance blocks 520. The plurality of balance blocks 520 are evenly arranged circumferentially along the assembly plate 510. The assembly plate 510 is mounted on the counterweight 400 via a support rod 700, and the vertical position of the assembly plate 510 on the support rod 700 is adjustable. By evenly arranging a plurality of balance blocks 520 circumferentially on the assembly plate 510, the eccentric inertia of operation is effectively counteracted, vibration and noise are suppressed, and the total counterweight can be flexibly adjusted by changing the number of balance blocks 520. By adjusting the vertical position of the assembly plate 510 on the support rod 700, the overall effective height and lever arm of the counterweight 400 can be changed, thereby compensating for vertical imbalance. For example, four balance blocks 520 may be provided. Of course, in other embodiments, the number of balance blocks 520 may be other, such as three, five, or six, as needed.

[0033] For example, the assembly plate 510 has a sliding sleeve hole adapted to the support rod 700. The assembly plate 510 is slidably sleeved on the support rod 700 through the sliding sleeve hole. The side wall of the assembly plate 510 has a radial threaded hole. A first set screw is installed in the threaded hole. By loosening the first set screw, the assembly plate 510 can slide up and down along the support rod 700 to adjust its vertical height. By tightening the first set screw, the end of the first set screw presses against the outer wall of the support rod 700. The assembly plate 510 is locked and fixed on the support rod 700 by friction. The structure is simple and the operation is convenient.

[0034] In other embodiments, the assembly plate 510 is slidably mounted on the counterweight 400 via a support rod 700, and the support rod 700 and the counterweight 400 are locked together by a locking member. The support rod 700 slides through the counterweight 400, and the locking member is a second set screw, which is threaded onto the side wall of the counterweight 400. When it is necessary to adjust the extension height of the support rod 700, the second set screw is loosened, and the support rod 700 can slide up and down relative to the counterweight 400. After adjusting to the target position, the second set screw is tightened, and the end of the second set screw abuts against the outer surface of the support rod 700, relying on friction to limit the sliding of the support rod 700 relative to the counterweight 400, thus completing the locking between the support rod 700 and the counterweight 400. Exemplarily, the assembly plate 510 is mounted on the support rod 700 by a fixing screw 800.

[0035] Optionally, a mounting rod 530 is provided between the balance block 520 and the assembly plate 510. One end of the mounting rod 530 is detachably connected to the assembly plate 510, and the other end is detachably connected to the balance block 520. This facilitates quick assembly and disassembly of the balance block 520, improving operational efficiency.

[0036] Alternatively, in some embodiments, the balance block 520 is movably sleeved on the mounting rod 530, and a limiting screw 900 is provided at the end of the mounting rod 530 away from the assembly plate 510 to prevent the balance block 520 from falling off the mounting rod 530. The balance block 520, movably sleeved on the mounting rod 530, can slide along the mounting rod 530, allowing for fine adjustment of the counterweight lever arm, facilitating precise dynamic balancing. The limiting screw 900 provides axial support to the balance block 520, effectively preventing it from falling off the mounting rod 530 during the grinding process due to centrifugal force.

[0037] Optionally, the base 100 is made of stainless steel or tool steel; the support 300 is made of aluminum alloy. The use of stainless steel or tool steel for the base 100 provides it with high structural rigidity and resistance to deformation, ensuring the long-term accuracy of the mounting reference of the boss 200. The use of aluminum alloy for the support 300 effectively reduces its weight, lowers its motion inertia, and facilitates machining and forming.

[0038] Preferably, the base 100 is manufactured through heat treatment and precision grinding; the bottom surface of the storage groove 310 is made using precision machining; and the bottom surface of the support 300 is precision ground. The heat treatment and precision grinding of the base 100 improve its hardness and resistance to deformation; the precision machining of the bottom surface of the storage groove 310 and the precision grinding of the bottom surface of the support 300 ensure excellent flatness and surface quality on all contact surfaces, allowing for full surface contact during component assembly and effectively guaranteeing assembly accuracy.

[0039] Optionally, the base 100 and the boss 200 can be configured as an integrally formed structure. Multiple bases 100 and multiple bosses 200 are provided, with each base 100 and multiple bosses 200 corresponding to one another. Each boss 200 has a different height, and a height mark is provided on the base 100 corresponding to each boss 200 to indicate the height of the boss 200 corresponding to that base 100, so as to facilitate the quick selection of a suitable boss 200.

[0040] Optionally, the grinding fixture also includes a calibration block, the height of which is consistent with the target grinding depth, used to verify whether the protrusion height of the optical waveguide chip 10 meets the requirements after it is installed.

[0041] This embodiment also provides a grinding method using the above-described grinding fixture. The grinding method includes the following steps: S1. Preparation: Provide a base 100, a boss 200, a support 300, a counterweight 400 and a balancing structure; S2. Assembly and cleaning: Install the boss 200 onto the base 100, clean the boss 200 and the base 100, and then install the support 300 onto the boss 200. S3. Install the optical waveguide chip 10: Fix the optical waveguide chip 10 to the bottom surface of the storage slot 310, and make the bottom end of the optical waveguide chip 10 abut against the base 100. For example, when installing the optical waveguide chip 10, the bottom surface of the receiving groove 310 can be heated first, and paraffin wax, beeswax or adhesive can be applied to the bottom surface of the groove. The optical waveguide chip 10 can be quickly placed in the predetermined position, gently pressed and the angle adjusted to the required position. After cooling, the optical waveguide chip 10 will be firmly adhered.

[0042] S4. Apply counterweight: Place the counterweight block 400 on the upper surface of the support 300; S5. Adjust the balance: Set the balance structure on the upper surface of the counterweight 400 to complete the assembly of the grinding fixture and make the grinding fixture have a balanced state that keeps it stationary in all directions. After assembling the grinding fixture, place it on a simulated horizontal surface and observe whether it tilts to one side. By adjusting the counterweight 400 and the balancing structure, the fixture can maintain a static balance in all directions.

[0043] S6. Grinding: Remove the support 300 of the grinding fixture from the boss 200, place the support 300 on the grinding plate of the grinding machine, start the grinding machine, and start grinding when the bottom end of the optical waveguide chip 10 contacts the grinding plate of the grinding machine. Grinding ends when the bottom surface of the support 300 contacts the surface of the grinding plate.

[0044] For example, the grinding machine is started, the grinding disc rotates and grinding slurry is added. Under its own weight and counterweight, the support 300 brings the bottom end of the optical waveguide chip 10 into contact with the grinding disc and grinding begins. Its working principle is: grinding continues until the bottom surface of the support 300 contacts the surface of the grinding disc. At this point, the part of the bottom end of the optical waveguide chip 10 that protrudes from the support 300 is just ground away, reaching the preset grinding depth, and grinding automatically terminates.

[0045] The grinding method provided in this embodiment uses the above-mentioned grinding fixture, which is easy to operate, improves the compatibility and process adaptability of the grinding fixture, avoids the need to make special fixtures for different grinding depths, and reduces manufacturing costs. By setting the counterweight 400 and the balancing structure, the center of gravity and balance of the grinding fixture are adjusted, so that the bottom end of the optical waveguide chip 10 is uniformly pressed, thereby achieving high-precision grinding.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A grinding fixture, characterized in that, include: Base (100); A boss (200) is detachably mounted on the base (100); A support (300) is detachably installed on the boss (200). The outer circumferential surface of the support (300) is provided with a plurality of storage slots (310). The plurality of storage slots (310) are evenly distributed along the circumference of the support (300). The storage slots (310) penetrate the upper and lower surfaces of the support (300). The depth of the storage slots (310) gradually decreases from top to bottom. The bottom surface of the storage slots (310) is set at an angle to the upper surface of the base (100). The bottom surface of the storage slots (310) is used to fix the workpiece to be ground. The bottom end of the workpiece to be ground can abut against the base (100). A counterweight (400) is disposed on the upper surface of the support (300); A balancing structure is provided on the upper surface of the counterweight (400).

2. The grinding fixture according to claim 1, characterized in that, The angle θ between the bottom surface of the storage slot (310) and the upper surface of the base (100) is 8 degrees or 90 degrees.

3. The grinding fixture according to claim 1, characterized in that, The boss (200) is cylindrical, and a positioning structure (600) is provided on the boss (200). The support (300) is detachably sleeved on the positioning structure (600), and the bottom surface of the support (300) abuts against the boss (200).

4. The grinding fixture according to claim 3, characterized in that, The positioning structure (600) is configured as a positioning pin.

5. The grinding fixture according to claim 1, characterized in that, The workpiece to be ground is bonded to the bottom surface of the storage tank (310) by paraffin wax, beeswax or adhesive.

6. The grinding fixture according to claim 1, characterized in that, The counterweight (400) is cylindrical, and the counterweight (400) and the support (300) are coaxially arranged.

7. The grinding fixture according to claim 1, characterized in that, The balancing structure includes an assembly plate (510) and a plurality of balancing blocks (520), wherein the plurality of balancing blocks (520) are evenly arranged along the circumference of the assembly plate (510); The assembly plate (510) is mounted on the counterweight (400) via a support rod (700), and the position of the assembly plate (510) on the support rod (700) in the vertical direction is adjustable; or, The assembly plate (510) is slidably mounted on the counterweight (400) via the support rod (700), and the support rod (700) and the counterweight (400) are locked together by a locking device.

8. The grinding fixture according to claim 7, characterized in that, An installation rod (530) is provided between the balance block (520) and the assembly plate (510); One end of the mounting rod (530) is detachably connected to the assembly plate (510), and the other end of the mounting rod (530) is detachably connected to the balance block (520); or, The balance block (520) is movably sleeved on the mounting rod (530), and a limiting screw (900) is provided at the end of the mounting rod (530) away from the assembly plate (510) to prevent the balance block (520) from falling off the mounting rod (530).

9. The grinding fixture according to claim 1, characterized in that, The base (100) is made of stainless steel or tool steel; the support (300) is made of aluminum alloy.

10. A grinding method, characterized in that, Using the grinding fixture as described in any one of claims 1-9, the grinding method includes the steps of: Preparation: Provide a base (100), a boss (200), a support (300), a counterweight (400), and a balancing structure; Assembly and cleaning: Install the boss (200) onto the base (100), clean the boss (200) and the base (100), and then install the support (300) onto the boss (200); Install the workpiece to be ground: fix the workpiece to be ground on the bottom surface of the storage groove (310) and make the bottom end of the workpiece abut against the base (100); Applying counterweight: The counterweight block (400) is placed on the upper surface of the support (300); Adjusting the balance state: The balance structure is set on the upper surface of the counterweight (400) to complete the assembly of the grinding fixture and make the grinding fixture have a balanced state that remains stationary in all directions; Grinding: Remove the support (300) from the boss (200), place the support (300) on the grinding disc of the grinding machine, start the grinding machine, and start grinding when the bottom end of the workpiece to be ground contacts the grinding disc. Grinding ends when the bottom surface of the support (300) contacts the surface of the grinding disc.

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