A prism polishing apparatus

Abstract

The present application relates to the technical field of prism polishing, in particular to a prism polishing device, comprising: a machine table, and a polishing chamber fixed on the machine table, a first air cylinder being fixed on the top of the polishing chamber in a symmetrical distribution, and a pressing plate being fixed on the telescopic end of the first air cylinder; a sleeve being rotatably installed on the pressing plate, an elastic support mechanism being arranged on the pressing plate, a movable plate being connected to the elastic support mechanism, and a polishing assembly being arranged on the polishing chamber and connected to the movable plate; a limiting rotation mechanism being arranged on the pressing plate and connected to the sleeve, when the polishing assembly is subjected to fluctuation of force, the limiting rotation mechanism is controlled to move by the movable plate, and under the action of the sleeve and the elastic support mechanism, the polishing pressure provided by the polishing assembly to the prism is always kept within a constant range, so that the problems of edge collapse or air polishing caused by fluctuation of force are avoided.

Description

Technical Field

[0001] This invention relates to the field of prism grinding technology, specifically a prism grinding device. Background Technology

[0002] Prisms, as core components of optical systems, are widely used in telescopes, microscopes, projectors, laser equipment, and various precision measuring instruments. Their surface accuracy, surface roughness, and angular error directly determine the imaging quality and energy transmission efficiency of the optical system. Therefore, the processing of prisms, especially the final polishing process, places extremely high demands on equipment performance and operator experience.

[0003] In existing technologies, prism grinding typically employs a constant-pressure grinding method. The basic principle involves fixing the prism to a fixture and applying a constant pressure via pneumatics or a counterweight, causing the prism to contact a high-speed rotating grinding disc, where the abrasive removes the material. To accommodate the varying pressure requirements of different processing stages, the operator needs to adjust the counterweight or air pressure before processing.

[0004] However, the prism material itself may have uneven hardness (such as defects like striations or bubbles in optical glass), or there may be slight undulations on the prism surface formed in previous processes, all of which can cause fluctuations in the actual contact pressure during the grinding process. When encountering local hard spots or protrusions, the instantaneous pressure will increase, which may not only cause overcutting, chipping, or microcracks on the prism surface, but also exacerbate local wear of the grinding disc and damage its flatness; when encountering concave or soft areas, the pressure will decrease rapidly, resulting in a decrease in material removal rate, forming areas that cannot be ground, affecting surface accuracy and surface consistency. Summary of the Invention

[0005] The purpose of this invention is to provide a prism grinding device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A prism grinding device, comprising: The machine base and the grinding chamber fixed on the machine base, the top of the grinding chamber is fixed with a first cylinder that is symmetrically distributed, and the extension and retraction end of the first cylinder is fixed with a pressure plate; Also includes: A sleeve is rotatably mounted on the pressure plate, the pressure plate is provided with an elastic support mechanism, a movable plate is connected to the elastic support mechanism, and a grinding assembly connected to the movable plate is provided on the grinding chamber; A limiting rotation mechanism is disposed on the pressure plate and connected to the sleeve. The limiting rotation mechanism can control the sleeve to perform a rotation action when the movable plate moves, so as to adjust the grinding pressure of the grinding assembly on the prism through the elastic support mechanism.

[0007] As a further embodiment of the present invention: the elastic support mechanism includes a fixed sleeve fixed to the pressure plate, a hollow rod sliding axially inside the fixed sleeve, and the hollow rod being fixedly connected to the movable plate; It also includes a follow-up component and an adjustment component disposed on the fixed sleeve and connected to the sleeve.

[0008] As a further embodiment of the present invention: the follower component includes a rotating sleeve fixed inside the sleeve, the outer circumferential wall of the rotating sleeve is formed with a guide groove, the fixed sleeve has a movable ring that slides axially, and the movable ring has a protrusion that slides and engages with the guide groove.

[0009] As a further embodiment of the present invention: the adjusting assembly includes a third cylinder fixed on the movable plate, a push plate fixedly connected to the third cylinder is axially slidable on the hollow rod, and springs are sleeved on the hollow rod and the fixed sleeve, with the two ends of the springs abutting against the push plate and the movable ring respectively.

[0010] As a further embodiment of the present invention: the guide groove includes a first pitch groove and a second pitch groove, and the ends of the first pitch groove and the second pitch groove are connected to each other.

[0011] As a further embodiment of the present invention: the grinding assembly includes a motor fixed at the end of the grinding chamber, a transmission rod rotatably mounted in the grinding chamber and connected to the output shaft of the motor, a rotating rod axially sliding inside the transmission rod and rotatably connected to the movable plate, and a grinding disc fixed at the end of the rotating rod.

[0012] As a further embodiment of the present invention: the limiting rotation mechanism includes support plates fixed on the movable plate and symmetrically distributed, and the support plates are formed with limiting grooves; It also includes an engagement assembly and a driven assembly disposed on the pressure plate and connected to the support plate.

[0013] As a further embodiment of the present invention: the engaging assembly includes a second cylinder fixed on the pressure plate, the telescopic end of the second cylinder is fixed with a limit plate, and the limit plate is fixed with an inclined block that engages with the limit groove.

[0014] As a further embodiment of the present invention: the driven component includes a guide groove formed on the outer wall of the circumference of the sleeve, and a limiting post fixed on the support plate is slidably engaged with the guide groove.

[0015] As a further embodiment of the present invention: the guide groove includes a vertical groove, a first spiral groove, and a second spiral groove, with the two ends of the vertical groove respectively connected to the first spiral groove and the second spiral groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: During the grinding process, when the surface hardness of the prism changes or a small protrusion causes a sudden increase in grinding resistance, the present invention can drive the sleeve and rotating sleeve to rotate by changing the position of the limiting post in the guide groove. At the same time, the rotation of the rotating sleeve, through the cooperation of the guide groove and the protrusion, drives the movable ring to generate a compensating displacement opposite to the direction of pressure fluctuation. That is, when the pressure needs to be increased, the device actively makes way, so that the rate of pressure increase is gradual, avoiding damage or chipping of the prism surface due to excessive instantaneous impact force. Conversely, when the pressure suddenly decreases, it can also slow down the release rate of the spring, preventing the grinding force from being reduced too much and resulting in incomplete grinding.

[0017] By combining the elastic support mechanism with the limiting rotation mechanism, the effective grinding pressure applied by the grinding disc to the workpiece surface can be kept basically constant, regardless of whether there are defects inside the prism material or whether there are slight undulations on the surface. This effectively suppresses surface shape errors and local overcutting caused by pressure fluctuations, and significantly improves the surface shape accuracy of the prism, the consistency of surface roughness, and the yield rate of mass-produced products.

[0018] After processing, when the inclined block is reset, the guiding effect of its inclined surface and the limiting groove can force the movable plate and the support plate to automatically adjust back to the precise initial position. At the same time, through the cooperation of the limiting post and the guide groove, the sleeve and the rotating sleeve are driven to rotate back to the initial angle, so that the device is ready for the next processing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of a prism grinding device.

[0020] Figure 2 This is a structural schematic diagram of another angle in one embodiment of the prism grinding equipment.

[0021] Figure 3 This is a cross-sectional structural diagram of the grinding chamber in one embodiment of a prism grinding device.

[0022] Figure 4 This is a schematic diagram of the structure of the pressure plate, sleeve, and partial limiting rotation mechanism in one embodiment of the prism grinding equipment.

[0023] Figure 5 for Figure 4 Another structural diagram from a different angle.

[0024] Figure 6 This is a cross-sectional structural diagram of the sleeve, fixed sleeve, and hollow rod in one embodiment of the prism grinding equipment.

[0025] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point A in the middle.

[0026] Figure 8 This is an exploded structural diagram of the elastic support mechanism in one embodiment of a prism grinding device.

[0027] Figure 9 This is a schematic diagram showing the connection relationship between the elastic support mechanism, the partial limiting rotation mechanism, and the grinding components in one embodiment of a prism grinding equipment.

[0028] Figure 10 This is an exploded structural diagram of a portion of the limiting rotation mechanism in one embodiment of a prism grinding device.

[0029] In the diagram: 1. Machine base; 2. Grinding chamber; 3. First cylinder; 4. Pressure plate; 5. Sleeve; 501. Vertical groove; 502. First spiral groove; 503. Second spiral groove; 6. Fixed sleeve; 7. Hollow rod; 8. Movable plate; 9. Support plate; 901. Limiting groove; 10. Limiting post; 11. Second cylinder; 12. Limiting plate; 1201. Inclined block; 13. Third cylinder; 14. Push plate; 15. Rotating sleeve; 1501. First pitch groove; 1502. Second pitch groove; 16. Movable ring; 1601. Protrusion; 17. Spring; 18. Motor; 19. Transmission rod; 20. Rotating rod; 21. Grinding disc. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0032] Please see Figures 1-10 In this embodiment of the invention, a prism grinding device includes: The machine base 1 and the grinding chamber 2 fixed on the machine base 1. The top of the grinding chamber 2 is fixed with symmetrically distributed first cylinders 3. The extension and retraction end of the first cylinders 3 is fixed with a pressure plate 4. Also includes: The sleeve 5 is rotatably mounted on the pressure plate 4. The pressure plate 4 is provided with an elastic support mechanism. A movable plate 8 is connected to the elastic support mechanism. A grinding assembly connected to the movable plate 8 is provided on the grinding chamber 2. A limiting rotation mechanism is provided on the pressure plate 4 and connected to the sleeve 5. The limiting rotation mechanism can control the sleeve 5 to perform a rotation action when the movable plate 8 moves, so as to adjust the grinding pressure of the grinding assembly on the prism through the elastic support mechanism.

[0033] Specifically, the grinding chamber 2 integrates a workpiece clamping mechanism for holding the prism. When grinding the prism, the grinding force is typically selected based on the grinding mode. To ensure that the grinding pressure applied to the prism remains constant within a given grinding mode, the downward pressure applied to the grinding assembly by the elastic support mechanism needs to be adaptively adjusted when pressure fluctuations occur. Initially, the position of the movable plate 8 is locked by the limiting rotation mechanism. At this point, the prism to be processed can be placed in the grinding chamber 2 and clamped and fixed. Simultaneously, the downward pressure provided to the grinding assembly is adjusted by the elastic support mechanism according to the grinding mode. Once the adjustment is complete, the first cylinder 3 operates. The pressure plate 4 is controlled to move towards the prism, so that the grinding assembly moves synchronously. When the grinding assembly moves to the processing position, that is, when it contacts the prism surface, the limiting rotation mechanism releases the locking of the movable plate 8. The force applied to the grinding assembly by the elastic support mechanism can be directly transmitted to the prism surface. Under the action of the grinding assembly, the prism is ground. If the hardness of the prism itself changes, or if its shape fluctuates, the grinding pressure will fluctuate. In response, the grinding assembly will drive the limiting rotation mechanism through the movable plate 8, so that the sleeve 5 rotates. The sleeve 5 will adaptively adjust the force of the grinding assembly on the prism through the elastic support mechanism, so as to ensure that the applied grinding force is always within a constant range.

[0034] Please see Figures 3-9The elastic support mechanism includes a fixed sleeve 6 fixed to the pressure plate 4, a hollow rod 7 slidably sliding within the fixed sleeve 6, and the hollow rod 7 being fixedly connected to the movable plate 8; it also includes a follower assembly and an adjustment assembly disposed on the fixed sleeve 6 and connected to the sleeve 5, the follower assembly including a rotating sleeve 15 fixed within the sleeve 5, the rotating sleeve 15 having a guide groove formed on its outer circumferential wall, and a movable ring 16 slidably sliding on the fixed sleeve 6, the movable ring 16 having an element fixed to the guide groove. The sliding engagement protrusion 1601, the adjustment assembly includes a third cylinder 13 fixed on the movable plate 8, the hollow rod 7 has a push plate 14 fixedly connected to the third cylinder 13 that slides axially, the hollow rod 7 and the fixed sleeve 6 are fitted with springs 17, the two ends of the springs 17 abut against the push plate 14 and the movable ring 16 respectively, the guide groove includes a first pitch groove 1501 and a second pitch groove 1502, the ends of the first pitch groove 1501 and the second pitch groove 1502 are connected to each other.

[0035] Please see Figures 1-6 , Figure 9 The grinding assembly includes a motor 18 fixed at the end of the grinding chamber 2. A transmission rod 19 connected to the output shaft of the motor 18 is rotatably installed inside the grinding chamber 2. A rotating rod 20 rotatably connected to the movable plate 8 is axially slidable inside the transmission rod 19. A grinding disc 21 is fixed at the end of the rotating rod 20.

[0036] In detail, a key is fixed on the outer circumference of the fixed sleeve 6, and a keyway is formed on the inner wall. A keyway is formed on the inner wall of the movable ring 16 that matches the key on the outer circumference of the fixed sleeve 6. A key is fixed on the outer circumference of the hollow rod 7 that matches the keyway on the inner wall of the fixed sleeve 6. The transmission rod 19 is hollow and has a keyway on its inner wall. A key is fixed on the outer wall of the rotating rod 20 that matches the keyway. With the cooperation of the keyway and the key, the movable ring 16 and the hollow rod 7 can only slide along the axial direction of the fixed sleeve 6 and cannot rotate. The rotating rod 20 can only slide along the axial direction of the transmission rod 19 and will not rotate. Please see Figure 6 In the initial state, under the action of the limiting rotation mechanism, the position of the movable plate 8 relative to the pressure plate 4 will not change, and the rotation angle of the sleeve 5 will be locked, so that the angle of the rotating sleeve 15 will not change. At this time, the protrusion 1601 is located at the connection position of the first pitch groove 1501 and the second pitch groove 1502. Under the action of the protrusion 1601, the first pitch groove 1501, and the second pitch groove 1502, the position of the movable ring 16 in the axial direction of the fixed sleeve 6 will not change. When the prism needs to be polished, the initial compression of the spring 17 can be adjusted according to the polishing mode. During coarse polishing, the polishing pressure needs to be increased. To do this, the third cylinder 13 can be controlled to work and drive the push plate 14 to slide along the axis of the hollow rod 7 and move towards the direction of the movable ring 16, thereby compressing the spring 17. When the elastic potential energy of the spring 17 reaches the set range, the third cylinder 13 will stop moving. Subsequently, the prism to be polished is placed in the polishing chamber 2, and the prism is fixed by clamping the workpiece. At the same time, the first cylinder 3 works, driving the pressure plate 4 to move towards the prism. The movement of the pressure plate 4 causes the fixed sleeve 6, hollow rod 7, movable plate 8 and polishing disc 21 to move down as a whole. When the grinding surface of the polishing disc 21 contacts the prism surface, the reaction force applied to the polishing disc 21 is transmitted to the push plate 14 through the rotating rod 20 and movable plate 8. This force is balanced with the preset elastic potential energy of the spring 17. At this time, the limiting rotation mechanism releases the lock on the position of the movable plate 8, so that the movable plate 8 and related components can produce a slight displacement relative to the pressure plate 4. The elastic potential energy stored in the spring 17 after compression is converted into a stable and continuous grinding pressure applied to the prism surface by the grinding disc 21 through the push plate 14, the third cylinder 13, the movable plate 8 and the rotating rod 20. At the same time, the motor 18 starts, and its output shaft drives the transmission rod 19 to rotate. Since the keyway on the inner wall of the transmission rod 19 slides and engages with the key on the outer wall of the rotating rod 20, the rotational motion of the transmission rod 19 is transmitted to the rotating rod 20 through the engagement of the key and the keyway, causing the rotating rod 20 and the grinding disc 21 fixed at its end to rotate synchronously. Under the constant pressure provided by the spring 17, the rotating grinding disc 21 performs rotational grinding on the prism surface.

[0037] During the polishing process, if the reaction force on the polishing disc 21 fluctuates due to uneven hardness, slight surface undulations, or slight movement of the clamping position of the prism, this fluctuation will be transmitted to the movable plate 8 in an instant. The instantaneous pressure change on the movable plate 8 will disrupt the force balance between it and the spring 17, forcing the movable plate 8 and the hollow rod 7 to produce a slight follow-up displacement along the axial direction of the fixed sleeve 6. The displacement of the movable plate 8 changes the compression of the spring 17 in real time through the third cylinder 13 and the push plate 14, thereby adjusting the elastic force output by the spring 17 to counteract and compensate for external pressure fluctuations and maintain the net pressure acting on the polishing disc 21 basically constant.

[0038] Please see Figures 3-6 , Figure 9 , Figure 10The limiting rotation mechanism includes a support plate 9 fixed on the movable plate 8 and symmetrically distributed, with a limiting groove 901 formed on the support plate 9; it also includes a locking assembly and a driven assembly disposed on the pressure plate 4 and connected to the support plate 9. The locking assembly includes a second cylinder 11 fixed on the pressure plate 4, with a limiting plate 12 fixed to the telescopic end of the second cylinder 11. An inclined block 1201 that is inserted into and cooperates with the limiting groove 901 is fixed on the limiting plate 12. The driven assembly includes a guide groove formed on the outer circumference of the sleeve 5. A limiting post 10 that slides and engages with the guide groove is fixed on the support plate 9. The guide groove includes a vertical groove 501, a first spiral groove 502, and a second spiral groove 503. The two ends of the vertical groove 501 are respectively connected to the first spiral groove 502 and the second spiral groove 503.

[0039] Please see Figure 4 , Figure 5 Furthermore, the first helical groove 502 and the second helical groove 503 are distributed in a mirror symmetry, and the first variable pitch groove 1501 and the second variable pitch groove 1502 are arranged in a variable pitch spiral. Starting from the connection point of the two, the pitch gradually increases when moving towards the direction away from each other. The maximum pitch of the first variable pitch groove 1501 and the second variable pitch groove 1502 is still less than the pitch of the first helical groove 502 and the second helical groove 503. The tilting block 1201 is arranged in a trapezoidal shape. In the initial state, under the action of the second cylinder 11, the tilting block 1201 is controlled by the limiting plate 12 to insert into the limiting groove 901, so that the distance between the tilting block 1201 and the sleeve 5 is minimized. In this state, the upper and lower horizontal surfaces of the tilting block 1201 abut against the edge of the limiting groove 901 respectively. Under the action of the tilting block 1201 and the limiting groove 901, the position of the support plate 9 is locked, thereby locking the position of the movable plate 8. At this time, the limiting post 10 is located at the center of the vertical groove 501, that is, the distance between the limiting post 10 and the first spiral groove 502 and the second spiral groove 503 is equal. The protrusion 1601 is located at the connection position of the first pitch groove 1501 and the second pitch groove 1502. Under the action of the limiting post 10 and the vertical groove 501, the angle of the sleeve 5 is locked, thereby locking the angle of the rotating sleeve 15, ensuring that the protrusion 1601 is always located at the connection position of the first pitch groove 1501 and the second pitch groove 1502. When the prism needs to be polished, the first cylinder 3 works, driving the pressure plate 4 to move towards the prism, so that the grinding surface of the polishing disc 21 contacts the prism surface. At this time, the second cylinder 11 is activated, and its extension end drives the limiting plate 12 and the tilting block 1201 to retract, so that the tilting block 1201 completely disengages from the limiting groove 901 on the support plate 9, thereby releasing the lock on the position of the movable plate 8. During the polishing process, if the surface hardness of the prism changes or encounters a small protrusion or depression, the reaction force on the polishing disc 21 will change accordingly. This change is transmitted to the movable plate 8 through the rotating rod 20, which disrupts the force balance between the movable plate 8 and the spring 17. When the force increases, the movable plate 8 and the support plate 9 and hollow rod 7 fixed thereto move toward the pressure plate 4 as a whole, further compressing the spring 17. The movement of the support plate 9 causes the limiting post 10 fixed thereto to slide in the guide groove of the sleeve 5. If the increase in force is small, the limiting post 10 only moves in the vertical groove 501 and does not trigger the rotation of the sleeve 5. If the force increases too much, the limiting post 10 will disengage from the vertical groove 501 and enter the first spiral groove 502 that is connected to it. Since the first spiral groove 502 is spiral, the sliding of the limiting post 10 in it forces the sleeve 5 and the rotating sleeve 15 fixed thereto to rotate around their own axis. The rotation of the rotating sleeve 15 causes the first variable pitch groove 1501 and the second variable pitch groove 1502 formed on its outer wall to be displaced relative to the protrusion 1601. The protrusion 1601 disengages from the connection position of the two and enters the first variable pitch groove 1501 and slides along its groove wall. Because the first pitch groove 1501 is set in a pitch spiral and the pitch gradually increases from the connection point outwards, under the action of the protrusion 1601 and the first pitch groove 1501, the movable ring 16 is driven by the protrusion 1601 to move towards the pressure plate 4 when the limiting post 10 enters the first spiral groove 502 to trigger the sleeve 5 to rotate. The movement of the movable ring 16 directly acts on the spring 17, which slows down the rate at which the spring 17 is compressed by the movable plate 8. As the pitch of the first pitch groove 1501 gradually increases, this buffering effect gradually increases. In this way, when encountering a hard object that causes a sudden increase in grinding resistance, the device can automatically give way and slow down the downward speed of the movable plate 8, thereby effectively reducing the rate of increase in grinding force, avoiding damage to the prism surface or vibration of the grinding disc 21 due to excessive instantaneous impact force, ensuring that the entire grinding process is carried out smoothly, and keeping the grinding force within the preset constant range. If the force decreases, and the decrease is excessive, the movable plate 8 moves away from the pressure plate 4 under the action of the spring 17, and the limiting post 10 enters the second spiral groove 503 from the vertical groove 501, triggering the sleeve 5 to rotate in the opposite direction. The protrusion 1601 enters the second pitch groove 1502, driving the movable ring 16 to move in the opposite direction, so that the elastic release rate of the spring 17 gradually decreases, thereby ensuring that the grinding is not incomplete due to insufficient grinding force. When the grinding is complete, the second cylinder 11 resets, pushing the limiting plate 12 and the tilting block 1201 to extend. The tilting surface of the tilting block 1201 first contacts the edge of the groove of the limiting groove 901. Under the guidance of the inclined surface, the support plate 9 and the movable plate 8 are forced to make slight displacements to adjust their positions until the tilting block 1201 is completely embedded in the limiting groove 901, and its upper and lower horizontal surfaces abut against the edge of the groove of the limiting groove 901, thus accurately locking the position of the movable plate 8 again. During this process, the displacement of the support plate 9 drives the sleeve 5 and the rotating sleeve 15 to rotate back to the initial angle through the cooperation of the limiting post 10 and the guide groove. The protrusion 1601 also returns to the connection position of the first pitch groove 1501 and the second pitch groove 1502, preparing for the next grinding.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A prism grinding device, comprising: The machine base and the grinding chamber fixed on the machine base, the top of the grinding chamber is fixed with a first cylinder that is symmetrically distributed, and the extension and retraction end of the first cylinder is fixed with a pressure plate; Its characteristic is that it further includes: A sleeve is rotatably mounted on the pressure plate, the pressure plate is provided with an elastic support mechanism, a movable plate is connected to the elastic support mechanism, and a grinding assembly connected to the movable plate is provided on the grinding chamber; A limiting rotation mechanism is disposed on the pressure plate and connected to the sleeve. The limiting rotation mechanism can control the sleeve to perform a rotation action when the movable plate moves, so as to adjust the grinding pressure of the grinding assembly on the prism through the elastic support mechanism.

2. The prism grinding equipment according to claim 1, characterized in that, The elastic support mechanism includes a fixed sleeve fixed to the pressure plate, a hollow rod that slides axially inside the fixed sleeve, and the hollow rod is fixedly connected to the movable plate; It also includes a follow-up component and an adjustment component disposed on the fixed sleeve and connected to the sleeve.

3. The prism grinding equipment according to claim 2, characterized in that, The follower component includes a rotating sleeve fixed inside the sleeve, a guide groove formed on the outer circumference of the rotating sleeve, a movable ring that slides axially on the fixed sleeve, and a protrusion fixed on the movable ring that slides and engages with the guide groove.

4. The prism grinding equipment according to claim 3, characterized in that, The adjustment assembly includes a third cylinder fixed on the movable plate, a push plate fixedly connected to the third cylinder and sliding axially on the hollow rod, and springs sleeved on the hollow rod and the fixed sleeve, with the two ends of the springs abutting against the push plate and the movable ring respectively.

5. The prism grinding equipment according to claim 3, characterized in that, The guide groove includes a first pitch groove and a second pitch groove, and the ends of the first pitch groove and the second pitch groove are connected to each other.

6. The prism grinding equipment according to claim 1, characterized in that, The grinding assembly includes a motor fixed at the end of the grinding chamber, a transmission rod rotatably mounted inside the grinding chamber and connected to the output shaft of the motor, a rotating rod axially sliding inside the transmission rod and rotatably connected to the movable plate, and a grinding disc fixed at the end of the rotating rod.

7. The prism grinding equipment according to claim 1, characterized in that, The limiting rotation mechanism includes support plates fixed to the movable plate and symmetrically distributed, and a limiting groove is formed on the support plate; It also includes a locking assembly and a driven assembly disposed on the pressure plate and connected to the support plate.

8. The prism grinding equipment according to claim 7, characterized in that, The engaging assembly includes a second cylinder fixed to the pressure plate, a limit plate fixed to the telescopic end of the second cylinder, and an inclined block fixed to the limit plate that engages with the limit groove.

9. A prism grinding device according to claim 8, characterized in that, The driven component includes a guide groove formed on the outer circumference of the sleeve, and a limiting post fixed on the support plate that slides into the guide groove.

10. A prism grinding device according to claim 9, characterized in that, The guide groove includes a vertical groove, a first spiral groove, and a second spiral groove, with the two ends of the vertical groove connected to the first spiral groove and the second spiral groove, respectively.

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