A processing method for optical lens

Abstract

This invention provides a method for processing optical lenses, including: Step 1: Controlling the drive component of the clamping device to its maximum open state, placing a first blank on a loading tray, and observing whether the first blank can be placed in the loading tray through the clamping plate; Step 2: If yes, controlling the drive component to clamp the first blank; if no, proceeding to Step 3; Step 3: Taking a second blank that can just pass through the clamping plate and placing it in the loading tray, controlling all the first solenoid valves to open, and controlling the drive component to switch from the maximum open state to the clamping limit state, causing the length adjustment component to retract, and then controlling all the first solenoid valves to close; Step 4: Repeating Step 1 and Step 2 until the first blank can be placed in the loading tray through the clamping plate. Through this setting, the clamping range of the clamping device can be adjusted by the length adjustment component, improving the applicability of a single machine tool and meeting the needs of flexible production.

Description

Technical Field

[0001] This invention generally relates to the field of optical lens manufacturing technology, and specifically to a method for processing optical lenses. Background Technology

[0002] In the processing of optical lenses, grinding processes such as rough grinding and fine grinding are required. Current grinding equipment typically uses a clamping device to hold the lens blank, then grinds it by rotating a grinding wheel. A certain amount of grinding fluid is added during the grinding process to remove grinding debris and improve grinding quality. However, current grinding equipment has the following problems: the clamping device has a limited travel distance, meaning one set of clamps can only handle lenses within a certain size range. For optical lenses with excessive travel, the clamping device needs to be replaced. To avoid frequent clamp changes, the current solution is to process lenses within a certain size range on each machine tool. This inevitably leads to a waste of production resources and cannot meet the needs of flexible production. Furthermore, after grinding the blank, it is difficult to remove it because it is between the clamping plates. Summary of the Invention

[0003] In view of the above problems, this application provides a method for processing optical lenses.

[0004] This invention provides a method for processing optical lenses, comprising the following steps:

[0005] Step 1: Control the drive component of the clamping device to the maximum open state, place the first blank of the lens to be ground on the material tray, and observe whether the first blank can be placed in the material tray through the clamping plate.

[0006] Step 2: If yes, control the drive component to clamp the first blank; if no, proceed to Step 3.

[0007] Step 3: Place the second blank, which can pass through the clamping plate, into the material tray, then control all the first solenoid valves to open, and control the drive to switch from the maximum open state to the clamping limit state, so that the length adjustment component retracts, and then control all the first solenoid valves to close.

[0008] Step four, repeat steps one and two until the first blank can be placed in the material tray by the clamping plate.

[0009] Furthermore, during the first step of the second procedure, after controlling the drive component to clamp the first blank, it is determined whether the clamping plate firmly clamps the first blank.

[0010] If so, then the clamping of the first blank is complete;

[0011] If not, the drive component is controlled to move from the clamping state of the first blank to the maximum open state, and stops at a first position with a preset displacement from the maximum open state. Then, the first solenoid valves are all opened, so that the length adjustment component extends until the clamping plate contacts the first blank, and then the first solenoid valves are closed.

[0012] Furthermore, the step of "determining whether the drive board firmly clamps the first blank" includes the following steps:

[0013] Obtain the detection value of the first pressure detection sensor; if the detection value is lower than a predetermined value, then determine it as no.

[0014] If the detected value is not less than the predetermined value, determine whether the state of the drive component is the maximum open state. If it is not in the maximum open state, determine it as yes; if it is in the maximum open state, determine it as no.

[0015] The first pressure detection sensor is disposed between the clamping plate and the driving member, and is used to detect the reaction force of the clamping plate on the driving member.

[0016] Furthermore, the driving component is a power telescopic rod that extends and retracts along the radial direction of the material tray, and the maximum open state is the state in which the power telescopic rod retracts to its limit along the direction away from the center position of the material tray.

[0017] Furthermore, the clamping limit state includes a first clamping limit state and a second clamping limit state. The first clamping limit state is when the driving member is fully extended to the center position of the loading tray to the limit. The second clamping limit state is when the driving member is not fully extended to the center position of the loading tray and the detection value of the first pressure detection sensor is not less than the predetermined value.

[0018] Furthermore, the method includes an optical lens processing apparatus, the apparatus including the material tray, the clamping device including at least two clamping assemblies evenly spaced around the material tray, the clamping assembly including a clamping plate, a length adjustment assembly and the driving member arranged sequentially away from the material tray, the length adjustment assembly including a first piston chamber slidably disposed along the extension and retraction direction of the driving member, a first piston slidably disposed in the first piston chamber, a first piston rod disposed on the first piston plate, a first spring disposed between the first piston and the first piston chamber, a first liquid passage connecting the two ends of the first piston chamber, a first solenoid valve disposed in the first liquid passage, the first spring being capable of providing elastic force to the first piston in the direction of the clamping plate, the axis of the piston chamber being consistent with its sliding direction, one end of the piston chamber away from the piston rod and the first piston rod being connected to the driving member, and the other end being connected to the clamping plate.

[0019] Furthermore, the clamping plate is an elastic arc-shaped plate that bends towards the material tray at both ends, and the radius of curvature of the elastic arc-shaped plate gradually decreases from the middle to both ends.

[0020] Furthermore, a support plate is horizontally arranged on the lower surface of the material tray, and a push rod is vertically arranged on the support plate. The material tray is arranged at the upper end of the push rod. The push rod is used to drive the material tray to rise to a preset height when the driving member switches from the state of clamping the blank to the maximum open state.

[0021] Beneficial effects

[0022] This invention provides a method for processing optical lenses, including: Step 1: Controlling the drive component of the clamping device to the maximum open state, placing a first blank for grinding the lens on a tray, and observing whether the first blank can be placed in the tray through the clamping plate; Step 2: If yes, controlling the drive component to clamp the first blank; If no, proceeding to Step 3; Step 3: Taking a second blank that can just pass through the clamping plate and placing it in the tray, then controlling all the first solenoid valves to open, and controlling the drive component to switch from the maximum open state to the clamping limit state, causing the length adjustment component to retract, and then controlling all the first solenoid valves to close; Step 4: Repeating Step 1 and Step 2 until the first blank can be placed in the tray through the clamping plate. This configuration allows for adjustment of the clamping range of the clamping device via the length adjustment component, and the adjustment is convenient and simple, improving the applicability of a single machine tool and meeting the needs of flexible production. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the process structure of an optical lens processing method provided by the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of an optical lens processing device provided by the present invention.

[0026] Figure 3 This is a top view of an optical lens processing apparatus provided by the present invention.

[0027] Figure 4 This is a schematic diagram of the principle structure of an optical lens processing device provided by the present invention.

[0028] Figure 5 for Figure 2 This is a magnified schematic diagram of a portion of point A in an optical lens processing device.

[0029] Figure 6 for Figure 5 The diagram shown is a partially enlarged structural schematic of point C in an optical lens processing apparatus provided by the present invention.

[0030] Figure 7 This is a schematic diagram of the clamping plate in an optical lens processing device provided by the present invention.

[0031] Figure 8 for Figure 5 The diagram shown is a partially enlarged structural schematic of point E in an optical lens processing apparatus provided by the present invention.

[0032] Figure 9 This invention provides a schematic diagram of the horizontal cross-section of the heat-conducting piston cylinder and the flow guide cylinder in an optical lens processing apparatus.

[0033] Figure 10 for Figure 5 The diagram shown is a partially enlarged structural schematic of point D in an optical lens processing apparatus provided by the present invention.

[0034] Figure 11 for Figure 5 The diagram shown is a partially enlarged structural schematic of point E in an optical lens processing apparatus provided by the present invention.

[0035] Figure 12 for Figure 5 The diagram shown is a partially enlarged structural schematic of point F in an optical lens processing apparatus provided by the present invention.

[0036] Figure 13 for Figure 12 The diagram shown is a partially enlarged structural schematic of the adjustment component at point GG in an optical lens processing apparatus provided by the present invention. Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] This invention provides a method for processing optical lenses. As a specific embodiment, refer to... Figure 1 It includes the following steps:

[0040] Step 1: Control the drive unit 23 of the clamping device to be in the maximum open state, place the first blank of the lens to be ground on the material tray 1, and observe whether the first blank can be placed in the material tray 1 through the clamping plate 21.

[0041] Step 2: If yes, control the drive unit 23 to clamp the first blank; if no, proceed to Step 3.

[0042] Specifically, refer to Figure 2 , Figure 3 , Figure 5-Figure 9 The method includes an optical lens processing device, which includes a base 3, a platform 30, a material tray 1, and a clamping device arranged around the material tray. The material tray 1 is located in the central area of ​​the platform 10. The clamping device is arranged on the platform 30, and at least two clamping plates 21 are evenly spaced around the material tray. When grinding the first blank, the blank needs to be placed on the material tray 1 through the area between the at least two clamping plates 21. Then, the driving member 23 extends towards the center of the material tray to drive the clamping plates to clamp the blank. Then, the grinding wheel rotates and presses and grinds the upper surface of the blank to achieve the effect of grinding the upper surface of the first blank. If the radial dimension of the first blank is too large, the first blank cannot pass through the area enclosed by the at least two clamping plates. At this time, the clamping device needs to be adjusted, and step three is performed. If the first blank can pass through, the clamping device is controlled to work and clamp the first blank.

[0043] Step 3: Place the second blank, which can pass precisely through the clamping plate 21, into the material tray 1. Then, control all the first solenoid valves 226 to open and control the drive component 23 to switch from the maximum open state to the clamping limit state, causing the length adjustment component 22 to retract. Then, control all the first solenoid valves 226 to close. Specifically, the specific structure of the clamping device is as follows: (Refer to...) Figures 5-7 The clamping device includes at least two clamping assemblies 2 evenly spaced around the material tray. Each clamping assembly 2 includes a clamping plate 21, a length adjusting assembly 22, and a driving member 23 arranged sequentially away from the material tray. The length adjusting assembly 22 includes a first piston chamber 221 slidably disposed along the extension / retraction direction of the driving member 23, a first piston 222 slidably disposed within the first piston chamber 221, a first piston rod 223 disposed on the first piston plate 222, a first spring 224 disposed between the first piston 222 and the first piston chamber 221, and a first liquid passage 225 connecting both ends of the first piston chamber 221. A first solenoid valve 226 is disposed in the first liquid passage 225. The first spring 224 provides a spring force to the first piston in the direction of the clamping plate. The axis of the piston chamber is aligned with its sliding direction. One end of the piston chamber away from the piston rod and the first piston rod are connected to the driving member, and the other end is connected to the clamping plate 21. (Reference) Figure 5 A guide groove 301 is provided on the water platform, and a sliding block 302 is guided in the guide groove 301. The first piston 221 and the sliding block 302 are detachably and fixedly connected by screws. The driving component is detachably and fixedly set on the water platform.

[0044] The working principle of the clamping device and the length adjustment method of the length adjustment component are as follows: (Refer to...) Figure 5When the clamping device is working, the first piston chamber is driven by the drive member 23 to slide along the guide groove, thereby driving the clamping plate to perform clamping and releasing actions. Specifically, the drive member 23 can be any one of a hydraulic telescopic rod, an electric telescopic rod, or a pneumatic telescopic rod. The length adjustment method is as follows: Specifically, both sides of the first piston chamber 221 are filled with hydraulic fluid. In the normal clamping state, the first solenoid valve 226 is closed, so the hydraulic fluid on both sides of the first piston cannot flow. At this time, the first piston 222 cannot move. Therefore, the drive member is activated. Force is transmitted to the clamping plate to perform clamping or releasing actions. When it is necessary to retract its length, the first solenoid valve is opened. At this time, the first liquid channel 225 connects the two ends of the first piston chamber. Then, the drive member 23 is extended to drive the clamping plate to clamp the second blank. After the clamping plate contacts the second blank, it stops moving, thereby squeezing the two ends of the length adjustment component. At this time, the first piston plate can squeeze the hydraulic fluid on the side away from the first piston rod, and flow through the first liquid channel 225 to the side of the first piston chamber near the first piston rod, thereby moving the first piston and achieving the purpose of retracting the first adjustment component.

[0045] Step four, repeat steps one and two until the first blank can be placed in the material tray by the clamping plate 21.

[0046] With this configuration, the clamping range of the clamping device can be adjusted by the length adjustment component 22, and the adjustment is convenient and simple, which improves the applicability of a single machine tool and can meet the needs of flexible production.

[0047] Specifically, it is understandable that during step one, when the first blank can pass through at least two clamping plates 21, the first blank may fall into two categories. The first category is that the radial dimension of the first blank is within the clamping range of the current state of the clamping device, and the clamping device can firmly clamp the first blank. The second category is that the radial dimension of the first blank is smaller and is not within the clamping range of the current state of the clamping device, and the clamping device cannot firmly clamp the first blank. Based on this problem, further, during the first step two, after controlling the drive unit 22 to clamp the first blank, it is determined whether the clamping plate 21 firmly clamps the first blank.

[0048] If so, then the clamping of the first blank is complete;

[0049] If not, the drive member 22 is controlled to move from the clamping state of the first blank to the maximum open state, and stays at a first position with a preset displacement from the maximum open state. Then, the first solenoid valves 226 are all opened, so that the length adjustment component 22 extends. Specifically, after the first solenoid valve is opened, the first piston plate can be pushed to move under the elastic force of the first spring 224, so that the first piston rod extends until the clamping plate 21 contacts the first blank, and then the first solenoid valve 226 is closed.

[0050] Furthermore, the step of "determining whether the drive board firmly clamps the first blank" includes the following steps:

[0051] The detection value of the first pressure detection sensor 227 is obtained. If the detection value is lower than the predetermined value, it is determined as no.

[0052] If the detected value is not less than the predetermined value, determine whether the state of the drive unit 21 is the maximum open state. If it is not in the maximum open state, determine it as yes; if it is in the maximum open state, determine it as no.

[0053] The first pressure detection sensor is disposed between the clamping plate and the driving member to detect the reaction force of the clamping plate on the driving member. In this way, when the clamping device cannot clamp the first blank firmly, the clamping requirements can be met by increasing the length of the length adjustment component.

[0054] Furthermore, as a specific implementation, the driving member is a power telescopic rod that extends and retracts along the radial direction of the material tray, and the maximum open state is the state in which the power telescopic rod retracts to its limit along the direction away from the center position of the material tray.

[0055] Furthermore, as a specific implementation, the clamping limit state includes a first clamping limit state and a second clamping limit state. The first clamping limit state is the state in which the driving member is fully extended to the center position of the material tray to the limit. The second clamping limit state is the state in which the driving member is not fully extended to the center position of the material tray and the detection value of the first pressure detection sensor is not less than the predetermined value.

[0056] Furthermore, as a preferred embodiment, refer to Figure 7The clamping plate 21 is an elastic arc-shaped plate with both ends bent towards the material tray, and the radius of curvature of the elastic arc-shaped plate gradually decreases from the middle to both ends. Specifically, the elastic arc-shaped plate can be made of elastic materials such as stainless steel or plastic. By setting the elastic arc-shaped plate in this way, when the elastic arc-shaped plate clamps the blank, both ends can first contact the blank, and then under the pushing force of the driving component, the clamping plate gradually unfolds against the elastic force of the elastic arc-shaped plate, so that the clamping surface of the elastic arc-shaped plate can fully contact the blank, ensuring the clamping effect, and the clamping plate can meet blanks of different sizes, so that blanks of different sizes can be fully clamped. As a preferred embodiment, the elastic force of the elastic arc-shaped plate is not greater than the predetermined value. As another preferred embodiment, an elastic layer 210 is also provided on the elastic arc-shaped plate, and the clamping surface of the clamping plate is the surface of the elastic layer. The material of the elastic layer is selected from rubber and other materials. By setting the elastic layer, on the one hand, the friction with the blank can be increased, and on the other hand, a buffering effect can be provided to avoid damage to the blank.

[0057] Example 2

[0058] The method also includes an optical lens processing device, which includes the material tray 1. The clamping device includes at least two clamping components 2 evenly spaced around the material tray. The clamping components 2 include a clamping plate 21, a length adjustment component 22, and the driving component 23 arranged sequentially away from the material tray. A support plate 31 is horizontally arranged on the lower surface of the material tray 1. The support plate is located below the horizontal platform 30 and is horizontally arranged. A push rod 10 is vertically arranged on the support plate 31. An opening 301 corresponding to the material tray is arranged in the middle of the horizontal platform. The material tray 1 is located at the upper end of the push rod 10. The push rod 10 is used to drive the material tray 1 to rise to a preset height when the driving component switches from the state of clamping the blank to the maximum open state.

[0059] Specifically, during the grinding of the blank, the lower surface of the loading tray contacts the upper surface of the support plate 31, thereby providing support force to the loading tray through the support plate. The blank is placed on the loading tray, and the clamping device clamps the blank. Then, the grinding wheel (not shown) located above the loading tray rotates and provides a certain pressure to the upper surface of the blank, grinding the upper surface of the blank. After the blank is ground, the support plate provides support force to the loading tray during grinding, and the drive component 23 retracts, thereby releasing the blank through the clamping device. By setting a displacement sensor on the drive component 23, the extension amount of the drive component 23 is obtained. When the drive component switches to the maximum open state, the push rod 10 pushes upward, driving the loading tray to rise and pushing the blank out to a certain height, making it easier for the operator to remove the blank, thereby improving work efficiency. The specific driving method of the push rod 10 is described below.

[0060] Further, refer to Figure 2 , Figure 4 A cylindrical surrounding plate 311 is provided around the material loading plate 1 on the upper surface of the support plate. A conical guide plate 33 is provided around the surrounding plate 311 on the upper surface of the support plate. The guide plate includes a first section 331 located on the upper surface of the support plate and a second section 332 located on the lower surface of the support plate. A drainage hole 312 is provided on the support plate 31 in the area between the first section and the surrounding plate 311. By providing the surrounding plate 311, the blank can be limited when the push rod lifts the material loading plate to prevent it from falling. A liquid guiding cylinder 333 is provided at the lower end of the second section 332. A heat-conducting piston cylinder 341 is coaxially provided inside the liquid guiding cylinder. The outer circumference of the heat-conducting piston cylinder 341 is vertically arranged... The heat-conducting plate 3411 is fixedly connected to the liquid-conducting cylinder. The end plate 341-1 is threadedly connected to the end of the heat-conducting piston cylinder 341. The second piston 341-2 is slidably connected inside. A rigid guide tube 341-3 is coaxially arranged on the end plate 341-1 with the heat-conducting piston cylinder. The second piston is provided with a first guide hole 341-21 that slides and seals with the guide tube 341-3. The end of the guide tube passing through the first guide hole 341-21 is threadedly connected to a limit nut 341-22. A second compression spring 341-4 is sleeved around the guide tube. The two ends of the second compression spring abut against the second piston and the end plate, respectively. The guide tube is fixedly connected to the end plate.

[0061] Furthermore, a third piston chamber 351 is coaxially arranged on the lower surface of the support plate 31 with the push rod 10. A third piston 352 is slidably arranged in the third piston chamber 351. The push rod 10 is connected to the third piston 352. The lower end of the third piston chamber 351 is connected to one end of the guide tube 341-3 extending from the end plate. A second solenoid valve 3513 is arranged between the guide tube 341-3 and the third piston chamber 351. A first flow port 3521 is arranged on the third piston. A second flow port 3511 is arranged at the upper end of the third piston chamber 351. The second flow port is connected to a negative pressure chamber 353 through a negative pressure tube 35110. A third solenoid valve 3531 is arranged between the negative pressure chamber and the second flow port. A third compression spring 354 is arranged between the third piston and the support plate.

[0062] Specifically, the push rod is driven as follows: When grinding the lens blank, both the second and third solenoid valves are closed. During grinding, abrasive fluid is supplied to the lens surface via a pump. This abrasive fluid improves the grinding effect. Heat is generated during grinding by the grinding wheel and the lens, thus heating the abrasive fluid passing over the blank surface. The abrasive fluid is then guided and collected by the guide plate 33 and flows into the guide cylinder 333, passing between the guide cylinder and the heat-conducting piston cylinder 341, where it is heated by the heat-conducting piston cylinder 341 and the heat-conducting plate 341. (Reference) Figure 3 , Figure 5 , Figure 8, Figure 9 A through hole communicating with the atmosphere is provided on the end plate, so the second piston 341-2 can move downward under the elastic force of the second compression spring 341-4. The thermally expanding fluid medium is filled below the second piston in the heat-conducting piston cylinder. After the heat-conducting piston cylinder and heat-conducting plate are heated, the internal thermally expanding fluid medium is heated, causing it to expand in volume. At this time, the second solenoid valve is in the closed state, so the thermally expanding fluid medium cannot flow out, pushing the second piston 341-2 to move upward against the elastic force of the second compression spring 341-4. As the grinding fluid temperature rises, the compression amplitude of the second compression spring 341 increases. When the grinding work is completed, the clamping device opens. At this time, the control device 9 and the clamping device drive... The actuator is connected to the second and third solenoid valves. When the actuator is in its maximum open state, both the second and third solenoid valves are opened. At this time, under the action of the second compression spring, the thermally expanding flow medium in the heat-conducting piston cylinder is squeezed through the guide tube into the third piston chamber 351, providing an upward pushing force to the third piston 352. The thermally expanding flow medium located above the third piston in the third piston chamber is drawn in through the negative pressure chamber, thereby causing the third piston to move upward against the thrust of the third compression spring, pushing out the push rod 10, thus achieving the effect of pushing the material tray upward. Furthermore, while the third piston is rising against the third compression spring, the thermally expanding flow medium below the third piston passes through the first flow channel on the third piston. The fluid flows from orifice 3521 to the top of the third piston, and then from the second flow port 353 into the negative pressure chamber until the forces on both sides of the second piston are balanced and stop. At this point, the push rod is pushed out to its highest height. The worker then removes the finished blank and places a new blank in. Under the elastic force of the second compression spring, the thermally expanding fluid in the heat-conducting piston cylinder continues to flow into the third piston chamber. However, because the extension length of the second compression spring is longer, the elastic force decreases, and the flow rate into the third piston chamber has decreased. At this point, the third piston begins to descend slowly until the second piston contacts the limit nut 341-22 and stops moving. Then, under the pressure of the third compression spring and the action of the negative pressure chamber, the third piston falls rapidly until the load... The tray contacts the support plate, and the operator can change and install the billet during the extension and slow descent of the push rod 10. To ensure that the operator has sufficient time to change the billet, the following relationship applies: where the elastic coefficient of the second compression spring is K1, the elastic coefficient of the third compression spring is K2, the cross-section of the inner cylinder of the heat-conducting piston cylinder is S1, the cross-sectional area of ​​the third piston cylinder is S2, the negative pressure provided by the negative pressure chamber is P1, where |P1|=(0.2-0.7)P0, the flow area of ​​the first flow port is φ1, the flow area of ​​the second flow port is φ2, and the flow area of ​​the guide tube is φ3, then φ1=(0.3-0.5)φ3, φ2=(1.2-1.4)φ1, K1 / S1=(1.5-3)&1|P1 / P0| -1 / 2K2 / S2, &1 is the adjustment coefficient, with a value range of 0.85-3.7, where P0 is the atmospheric pressure.

[0063] Specifically, the above-mentioned driving method of the push rod, since the flow cross-sections of the second compression spring, the third compression spring, and the guide tube, as well as the flow cross-sections of the first and second flow ports, are all constant values, when the negative pressure P1 value provided by the negative pressure chamber and the ambient temperature are within the temperature difference range of 3-5 degrees Celsius, and the temperature of the grinding fluid flowing through the heat-conducting piston cylinder is 32-35 degrees Celsius, when the processing time of a blank is more than 10 minutes, the time T experienced by the push rod from the start of pushing out to the lowest position again is 10-13 seconds, while the time required for the operator to take out the replaced blank and place the blank to be ground is 5-8 seconds, which is fully satisfactory.

[0064] Furthermore, as a specific embodiment, the base 3 also includes a liquid storage tank 3a, which stores grinding fluid. The grinding fluid flows into the liquid storage tank after passing through the guide tube, and is then pumped to the blank again by a pump body (not shown). The upper surface of the liquid storage tank is provided with a cylindrical first connecting cylinder 3a-1 coaxially arranged with the push rod 10. The horizontal platform is coaxially provided with a downwardly extending cylindrical second connecting cylinder 32. The second connecting cylinder 32 is coaxially arranged with the first connecting cylinder and surrounds the outer periphery of the first connecting cylinder. The inner sidewall of the first connecting cylinder is uniformly spaced... At least three rigid plates 3a-11 are horizontally arranged at the axis, and a connecting rod 3a-12 is vertically guided on each rigid plate. The support plate 31 is provided with mounting holes corresponding to the connecting rods. The upper end of the connecting rod is detachably connected to the support plate through the mounting holes. A limit plate 3a-14 is provided at the lower end of the connecting rod located on the rigid plate 3a-11. A first compression spring 3a-13 is sleeved around the periphery of each connecting rod. One end of the first compression spring abuts against the support plate 31, and the other end abuts against the rigid plate. The first connecting cylinder 3a-1 is connected to the second connecting cylinder 32.

[0065] Furthermore, a reflux device 4 is provided between the negative pressure chamber 353 and the lower end face of the heat-conducting piston cylinder. The reflux device 4 is used to directly pump the flow in the negative pressure chamber 353 back to the heat-conducting piston cylinder when the grinding wheel grinds the blank held on the clamping device. The reflux device includes at least one fourth piston chamber 41 vertically arranged between the top of the liquid storage tank and the support plate 31. A fourth piston 42 is movably arranged in the fourth piston chamber. A fourth piston rod 43 is provided on the upper surface of the fourth piston. The end of the fourth piston rod extending out of the fourth piston chamber 41 is connected to the support plate 31. A fifth piston chamber 353a is also provided on the upper surface of the liquid storage tank. A fifth piston rod 43 is provided in the fifth piston chamber. A tension spring 353c is provided between the first end face of the fifth piston chamber and the fifth piston 353b. The tension spring 353c can provide a pulling force to the fifth piston towards the first end face. The negative pressure chamber 353 is a cavity located on the side of the fifth piston away from the first end face. A first liquid inlet 341-5 is provided at the lower end of the heat-conducting piston cylinder. A first liquid port 410 communicating with the negative pressure chamber and a second liquid port 411 communicating with the lower end of the heat-conducting piston cylinder are provided at the lower end of the fourth piston chamber. A first one-way valve 412 is provided at the first liquid port 410 to allow the flowing medium to flow into the fourth piston chamber in one direction, and a second one-way valve 413 is provided at the second liquid port to allow the flowing medium to flow out of the fourth piston chamber in one direction.

[0066] Specifically, refer to Figure 2 , Figure 4 , Figure 11The liquid storage tank is placed on the ground to provide support. When no grinding work is being performed, the limiting block 3a-14 abuts against the horizontal limiting plate 323 under the elastic force of the first compression spring, thus compressing the first spring to a certain extent. The elastic force of the first spring provides support to the support plate, which in turn provides support to the horizontal platform. The working principle of the return device 4 is as follows: when grinding the blank held in the clamping device, the grinding wheel provides vertical downward pressure on the blank and rotates simultaneously, thereby achieving grinding of the blank. By setting the first compression spring 3a-13, a certain buffering effect can be provided during the grinding process to avoid damage to the blank due to uneven force during grinding. During the grinding process, a certain displacement change will occur between the support plate and the liquid storage tank. At this time, the fourth piston rod can be pushed to reciprocate in the vertical direction, driving the fourth piston to reciprocate. Referring to the figure, when the fourth piston moves upward... During operation, a negative pressure is generated on the lower side of the fourth piston chamber. Under the action of the negative pressure, the first one-way valve 412 is opened, creating a suction effect on the negative pressure chamber, thereby drawing the thermally expanding flow medium in the negative pressure chamber into the fourth piston chamber. Under the action of the negative pressure, the fifth piston is driven to move and stretch the tension spring 353c. When the fourth piston moves vertically downward, it compresses the space below the fourth piston chamber, thereby increasing its internal pressure. At this time, the first one-way valve 412 closes, and the second one-way valve 413 is opened, squeezing the thermally expanding flow medium in the fourth piston chamber into the heat-conducting piston cylinder. During the grinding process, the above actions are repeated, thereby realizing the return pumping of the thermally expanding flow medium in the negative pressure chamber to the heat-conducting piston cylinder. When the thermally expanding flow medium in the negative pressure chamber returns to the heat-conducting piston cylinder, the tension spring 353c is stretched again, thereby providing negative pressure to the negative pressure chamber through the tension spring.

[0067] Furthermore, as a preferred embodiment, it is understood that the vertical displacement of the support plate is relatively small during grinding. Therefore, a displacement amplification device (not shown in the figure) can be installed above the support plate and the reservoir to amplify the vertical displacement of the support plate, improve the floating motion of the fourth piston, and thus improve the reflux pumping effect. In a specific embodiment, the displacement amplification device can be a cylindrical cavity with a cross-section larger than the fourth piston cavity, vertically arranged between the support plate and the top of the reservoir. The bottom of the cylindrical cavity is located at the top of the reservoir, and a first bellows is coaxially arranged and interconnected at the top. The first bellows is connected to the lower surface of the support plate, and the first bellows and the cylindrical cavity... The cavity is filled with a hydraulic fluid. The fourth piston chamber is positioned at the top of the reservoir. The top of the fourth piston rod is connected to a second bellows, the top of which is connected to the lower surface of the support plate. The first and second bellows are interconnected. The cross-sectional area of ​​the first bellows is larger than that of the second bellows. With this arrangement, when the displacement between the support plate and the reservoir changes, the length of the first bellows changes, which in turn causes a change in the length of the second bellows. Because the cross-sectional area of ​​the first bellows is larger than that of the second bellows, the change in length of the first bellows is greater than that of the second bellows, thus achieving a displacement amplification effect.

[0068] Further, refer to Figure 5 , Figures 10-13In a preferred embodiment, the connection between the second connecting cylinder and the first connecting cylinder is as follows: The inner wall of the second connecting cylinder is provided with an annular groove 321 coaxially arranged with the push rod 10. Multiple sliders 322 are evenly spaced around the push rod within the annular groove. The sliders 322 are detachably fixed to the support plate, and their upper and lower ends respectively engage with the upper and lower sides of the annular groove. At least three limiting blocks 3a-14 are evenly spaced on the outer wall of the first connecting cylinder 3a-1. The inner circumferential surface of the second connecting cylinder 32 is provided with at least three horizontal limiting plates 323 corresponding to at least one of the limiting blocks 3a-14, and inclined plates 324 are located at the ends of the horizontal limiting plates. The inclined plates are positioned upstream of the horizontal limiting plates, meaning upstream of the direction of rotation of the grinding wheel when the blank is being ground. Specifically, it can be understood that during the grinding process… When the pressure of the grinding wheel on the workpiece is too high, the friction between the grinding wheel and the workpiece becomes excessive, leading to workpiece damage. This application addresses this issue by using the aforementioned design. When the friction between the grinding wheel and the workpiece is too high, the grinding wheel exerts a force on the workpiece to rotate around the push rod axis. The workpiece also exerts a rotational force on the first connecting cylinder through the clamping device. Due to the inclined plate, the limiting block is positioned, preventing relative rotation between the first and second connecting cylinders. When the friction is too high, this rotational force also becomes excessive, driving the first and second connecting cylinders to rotate relative to each other. The limiting block slides upwards along the inclined plate, causing the support plate and horizontal platform to move downwards against the spring force of the first compression spring. This causes the workpiece to move downwards by a certain amount, reducing the pressure between the grinding wheel and the workpiece, thus reducing friction and protecting the workpiece.

[0069] Furthermore, it is understood that since the frictional force generated on the billet by the friction discs of different sizes is also different, the required inclination angle of the inclined plate 324 is also different. As a specific implementation method, refer to... Figure 11 , Figure 12An adjustment assembly 325 for adjusting the inclination of the inclined plate is also provided on the second connecting cylinder. One end of the inclined plate 324 is connected to the horizontal limiting plate 323 by a pin. The adjustment assembly includes a sliding lug 3251 that is slidably disposed on the lower surface of the inclined plate in a direction away from the horizontal limiting plate, an adjustment plate 3252 that is horizontally disposed on the second connecting cylinder, and a rotating sleeve 3253 that is rotatably disposed on the adjustment plate and vertically disposed. A limiting boss 32531 is provided on the rotating sleeve above the adjustment plate, and a limiting snap ring 32532 is engaged below the adjustment plate. An adjustment screw 3254 is threadedly connected to the rotating sleeve. The upper end of the adjustment screw is connected to the sliding lug 3251 through a horizontal pin 3255. The horizontal pin is perpendicular to the sliding direction of the sliding lug 3251. With this arrangement, the length of the adjustment screw can be adjusted by driving the rotating sleeve to rotate, thereby adjusting the inclination of the inclined plate.

[0070] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A method for processing optical lenses, characterized in that, The processing method includes an optical lens processing apparatus, which includes a material tray (1) and a clamping device including at least two clamping assemblies (2) evenly spaced around the material tray. The clamping assembly (2) includes a clamping plate (21), a length adjustment assembly (22), and a driving member (23) arranged sequentially away from the material tray. The length adjustment assembly (22) includes a first piston chamber (221) slidably disposed along the extension and retraction direction of the driving member (23), a first piston plate (222) slidably disposed within the first piston chamber (221), and a first piston plate (222) disposed within the first piston chamber (221). A piston plate (222) has a first piston rod (223), a first spring (224) disposed between the first piston plate (222) and the first piston chamber (221), a first liquid passage (225) connecting the two ends of the first piston chamber (221), a first solenoid valve (226) disposed in the first liquid passage (225), the first spring (224) can provide elastic force to the first piston in the direction of the clamping plate, the axis of the piston chamber is consistent with its sliding direction, the end of the piston chamber away from the piston rod is connected to the driving member, and the first piston rod is connected to the clamping plate (21); The processing method includes the following steps: Step 1: Control the drive unit (23) of the clamping device to be in the maximum open state, place the first blank of the lens to be ground on the material tray (1), and observe whether the first blank can be placed in the material tray (1) through the clamping plate (21); Step 2: If yes, then control the drive unit (23) to clamp the first blank; if no, proceed to step 3. Step 3: Take a second blank that can pass through the clamping plate (21) and place it in the material tray (1). Then control all the first solenoid valves (226) to open and control the drive (23) to switch from the maximum open state to the clamping limit state, so that the length adjustment component (22) retracts. Then control all the first solenoid valves (226) to close. Step 4: Repeat steps 1 and 2 until the first blank can be placed in the material tray through the clamping plate (21); When performing step two for the first time, after controlling the drive unit (23) to clamp the first blank, it is determined whether the clamping plate (21) clamps the first blank firmly. If so, then the clamping of the first blank is complete; If not, control the drive member (23) to move from the clamping state of the first blank to the maximum open state, and stop at the first position with a preset displacement from the maximum open state. Then control the first solenoid valve (226) to open, so that the length adjustment component (22) extends until the clamping plate (21) contacts the first blank, and then close the first solenoid valve (226). The step of "determining whether the clamping plate firmly clamps the first blank" includes the following steps: The detection value of the first pressure detection sensor (227) is obtained, and if the detection value is lower than the predetermined value, it is determined to be no; If the detected value is not less than the predetermined value, determine whether the state of the drive unit (23) is the maximum open state. If it is not in the maximum open state, determine it as yes; if it is in the maximum open state, determine it as no. The first pressure detection sensor is disposed between the clamping plate and the driving member, and is used to detect the reaction force of the clamping plate on the driving member.

2. The processing method for an optical lens according to claim 1, characterized in that, The driving component is a power telescopic rod that extends and retracts along the radial direction of the material tray. The maximum open state is when the power telescopic rod retracts to its limit along the direction away from the center of the material tray.

3. The processing method for an optical lens according to claim 1, characterized in that, The clamping limit state includes a first clamping limit state and a second clamping limit state. The first clamping limit state is when the driving member is fully extended to the center position of the loading tray to the limit. The second clamping limit state is when the driving member is not fully extended to the center position of the loading tray and the detection value of the first pressure detection sensor is not less than the predetermined value.

4. The processing method for an optical lens according to claim 1, characterized in that, The clamping plate (21) is an elastic arc-shaped plate that bends towards the material tray at both ends, and the radius of curvature of the elastic arc-shaped plate gradually decreases from the middle to both ends.

5. The processing method for an optical lens according to claim 4, characterized in that, A support plate (31) is horizontally arranged on the lower surface of the material tray (1), and a push rod (10) is vertically arranged on the support plate (31). The material tray (1) is located at the upper end of the push rod (10). The push rod (10) is used to drive the material tray (1) to rise to a preset height when the drive unit switches from the state of clamping the blank to the maximum open state.

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