Lens polishing machine

Abstract

The application discloses a lens polishing machine, which is characterized in that the machine comprises a rack, a horizontal conveying table slidingly arranged on the rack, a chuck for clamping a spectacle lens and a clamp for clamping a model, a screw rod assembly installed on the rack, a moving part reciprocally moving and driven by a driving motor, a magnetic part fixed on the horizontal conveying table and used for magnetically attracting and fixing the moving part to drive the horizontal conveying table to reciprocally move, an angle sensor for detecting the rotation of a vertical plane, the angle sensor comprising a rotating rod, the rotating rod being fixed with a swing rod which rotates downward under the action of gravity, and one end of the swing rod abutting against the upper end of the model in the clamp; the lens can be quickly and widely horizontally moved during contour polishing and horizontally finely adjusted during side arc polishing, the two polishing modes can be freely switched in the horizontal movement through the magnetic attraction connection mode, and the angle sensor completes the contour scanning and positioning of the model profile through the swing rod.

Description

Technical Field

[0001] This invention relates to the field of lens polishing, and more specifically, to a lens polishing machine. Background Technology

[0002] The optical shop is equipped with lens polishing equipment, most of which is contour polishing.

[0003] For example, if a Chinese patent document with application number CN00264825.3 is found, the patent title is "A spectacle lens processing instrument," and its description states... Figure 2 Lens 3 and model 4 are set coaxially, and the contour of lens 3 is completed by the edge trajectory of model 4.

[0004] Existing lens grinding equipment cannot thin the sides of the lens after the lens outline has been ground and cut. There are two main difficulties: First, the movement of the coarse and fine grinding stones on the horizontal transfer table involves large strokes, while the grinding of the lens side involves only a small horizontal displacement. The two movement methods have different precision and are difficult to be compatible. Second, the amount of grinding on the side of the lens varies at different locations during lens grinding, and existing equipment cannot perform precise positioning and scanning of the lens. Summary of the Invention

[0005] The purpose of this invention is to provide a lens polishing machine that allows for rapid, large-span horizontal movement of the lens during outward grinding and fine-tuning horizontal movement during side arc grinding. Through a magnetic connection, the two grinding modes can be freely switched during horizontal movement. An angle sensor is attached to the model via a swing rod. When the model rotates, the swing rod swings along the model contour to different degrees, allowing the angle sensor to record the angle data values ​​of each point on the model, thus completing the outward scanning and positioning of the model contour.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A lens polishing machine includes a frame with a horizontal transfer stage that slides along the frame. The horizontal transfer stage includes a chuck for clamping spectacle lenses and a fixture for clamping a model. A lead screw assembly is mounted on the frame, and the lead screw assembly includes a drive motor and a reciprocating moving component. A magnetic component is fixed to the horizontal transfer stage for magnetically attracting and fixing the moving component to drive the horizontal transfer stage to move back and forth. An angle sensor for detecting vertical rotation is mounted on the horizontal transfer stage. The angle sensor includes a rotating rod, and a swing rod that rotates downward under gravity is fixed to the rotating rod. One end of the swing rod abuts against the upper end of the model in the fixture.

[0007] By adopting the above technical solution, the lens can be moved quickly and horizontally over a large span during the outer surface grinding and made up to be moved horizontally with fine adjustments during the side arc grinding. Through the magnetic connection, the two grinding methods can be switched freely during horizontal movement.

[0008] The model is a sample shape of the lens. Therefore, after polishing the lens with the model as a reference, the change in the curvature of the outer contour of the lens is the same as that of the model. Moreover, the model and the lens held in the horizontal transfer stage coincide along the rotation axis. Therefore, scanning and positioning the contour of the model is equivalent to scanning and positioning the contour of the polished lens. This operation has two advantages. First, the side polishing process of the lens is after the contour polishing of the lens, so the process connection is extremely smooth. Since neither the model nor the lens has moved in the horizontal transfer stage, the scanning accuracy is extremely high. Second, the lens position has a large space occupied by the grinding stone, so the scanning space is small, while the model position is relatively open and scanning is more convenient. Therefore, scanning and positioning the model position is more beneficial.

[0009] Angle sensors are attached to the model via a swing rod. When the model rotates, the swing rod swings along the model's contour to different degrees, causing the angle sensors to record angle data values ​​at various points on the model. This completes the scanning and positioning of the model's contour, allowing the control system to use the model's position obtained from the angle sensors to perform different degrees of thinning on the lens side.

[0010] Preferably, the drive motor is a through-type lead screw motor, and the moving part is a lead screw component that passes through the through-type lead screw motor; a slider is fixed at one end of the lead screw component, and a groove is opened on the frame, the length direction of the groove is parallel to the length direction of the lead screw component, and the slider slides in the groove; a magnetic metal block is fixed at the other end of the lead screw component.

[0011] By adopting the above technical solution, the through-type lead screw motor is fixed to the frame, allowing the lead screw to move back and forth. The design of the slider and groove makes the back-and-forth movement trajectory of the lead screw more stable and precise. The metal block is used to magnetically attract the magnetic components, thereby driving the horizontal moving table to move quickly and precisely. The working principle of the through-type lead screw motor: The through-shaft lead screw stepper motor integrates the nut and the motor rotor into one unit, with the lead screw shaft passing through the center of the motor rotor. In use, the lead screw is fixed and anti-rotation is implemented. When the motor is powered on and the rotor rotates, the motor will move linearly along the lead screw; conversely, if the motor is fixed and anti-rotation is implemented, the lead screw will move linearly.

[0012] Preferably, the frame is equipped with a contact switch that triggers the through-type lead screw motor to stop in a contact manner when the slider is reset.

[0013] By adopting the above technical solution, the contact switch is designed to ensure that the lead screw assembly returns to its initial position before stopping. The purpose of this is that if the lead screw assembly could stop freely at the extended position, it would interfere with the manual adjustment of the horizontal position of the horizontal moving table. This is because the extended position shortens the distance between the moving part and the magnetic part, thus reducing the adjustable distance of the horizontal moving table. Since the manual adjustment range of the horizontal moving table is relatively large, the lead screw assembly should return to its initial position to provide more movement space for the horizontal moving table when stopping the thinning process of the V-shaped grinding stone.

[0014] Preferably, the magnetic surfaces of both the magnetic component and the movable component are flat vertical surfaces.

[0015] By adopting the above technical solution, the advantage of a vertical surface is that it reduces the adhesion of powder and debris, ensuring that there are no foreign objects in the middle when the magnetic and moving parts are magnetically attracted, making the position of the moving horizontal stage more precise. The advantage of a vertical surface over an inclined surface is that an inclined surface is prone to dust accumulation. Since a large amount of dust is generated during lens polishing, if the magnetic attraction surface is inclined, a layer of dust will easily accumulate. A vertical surface effectively avoids this situation.

[0016] Preferably, the magnetic component is a powerful magnet.

[0017] By adopting the above technical solutions, strong magnets with high magnetic properties can be produced, such as neodymium iron boron magnets.

[0018] Preferably, the magnetic component is an electromagnet, and the electromagnet and the drive motor are equipped with a switch button for synchronous opening and closing.

[0019] By adopting the above technical solution, the advantages of electromagnets are that they generate magnetism when energized. This means that if the horizontal moving table comes into contact with the magnetic component during manual translation, it will not be immediately attracted to the magnet, making it more convenient to grind and adjust the position of the lens. Secondly, the processing room in an optical shop contains many small screws needed for eyeglass frames. Because of their small size, they are not easily noticed when they are scattered and attracted to the magnetic component. If a screw is located between the magnetic component and the moving component during lens thinning, it will cause the horizontal moving table to be mispositioned during back-and-forth movement, resulting in lens processing failure. Electromagnets solve this problem well. Since electromagnets are not magnetic when not in use, even if small screws or other metal parts fall from above, they will not be attracted to the magnet. This avoids the occurrence of foreign metal objects between the magnetic component and the moving component, thus improving the success rate of thinning the lens side.

[0020] The switch button is used to ensure that the electromagnet and the drive motor turn on and off together.

[0021] Preferably, a horizontal bar is fixed to one end of the swing rod that abuts against the model. The length of the horizontal bar is at least three times the thickness of the model, and the length direction of the horizontal bar is consistent with the thickness direction of the model. The horizontal bar abuts against the upper end of the model.

[0022] By adopting the above technical solution, the crossbar increases the contact points in the thickness direction of the model, so that the swinging rod's lateral swing will not affect the angle reading.

[0023] Preferably, the rotating rod is equipped with a torsion spring that drives the swing rod to press against the model in the fixture. The torsion spring is sleeved on the rotating rod, and a support rod is fixed to the outer wall of the rotating rod. One end of the torsion spring is fixed to the horizontal transfer table, and the other end of the torsion spring abuts against the support rod.

[0024] By adopting the above technical solution, the torsion spring provides a sustained driving force, which makes the swing arm fit tightly against the outer edge of the model, ensuring the accuracy of angle reading.

[0025] Preferably, a lifting arm is rotatably connected to the outer wall of the horizontal transfer table. The lifting arm is equipped with a damping ring to achieve positioning at the stop position. The lifting arm is located below the swing rod. When the lifting arm rotates upward, it lifts the swing rod to separate the swing rod from the model in the fixture. A magnetic block for magnetically attracting the swing rod is fixed on the side of the lifting arm that contacts the swing rod.

[0026] By adopting the above technical solution, (1) the function of lifting the arm is to separate the swing rod from the model. Because there are multiple grinding processes on the grinding machine, other processes do not require scanning the model outline. Therefore, in other processes, it is necessary to separate the swing rod from the model to reduce the interference of the swing rod in other processes. (2) When the arm is raised to a vertical position, the swing arm is prone to fall freely in the opposite direction because there is no support force. In this case, the swing arm will hit other parts on the equipment and cause interference. Secondly, after the swing arm falls, the staff needs to flip the swing arm from back to front in a large range when scanning the edge of the model, which is inconvenient to operate.

[0027] Preferably, the frame is equipped with a rotating shaft, on which grinding stones and V-shaped grinding stones are fixed. The frame is also equipped with an air pump, which includes a housing fixed to the frame and blades mounted on the rotating shaft. The air pump's outlet pipe faces the edge of the model in the fixture and is positioned downwards. The outlet pipe and the swing rod are located on both sides of the model. The frame is also equipped with a baffle, with the grinding stones and V-shaped grinding stones located on one side of the baffle and the air pump's inlet pipe located on the other side of the baffle.

[0028] By adopting the above technical solution, the air pump uses a rotating shaft as its power source to deliver airflow to the side of the model. This ensures that the scanned edges of the model are smooth and free of foreign objects, avoiding errors caused by foreign objects or dust adhering to the model edges. To prevent airflow interference with the swing arm, the air inlet is located on the opposite side of the swing arm relative to the model, with the airflow blowing downwards while the swing arm is above the model. This airflow configuration effectively prevents airflow interference with the swing arm. The baffle separates the air pump's air inlet from the grinding station, as the grinding station generates a large amount of dust, and isolating the air inlet with the baffle effectively solves this problem. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the front side of the grinder in Example 1; Figure 2 This is a schematic diagram of the rear side of the grinder in Example 1; Figure 3 This is an exploded view of the frame and horizontal moving platform in Example 1; Figure 4 This is an exploded view of the frame and horizontal moving platform in Example 1; Figure 5 This is a schematic diagram showing the positional relationship of the angle sensor on the horizontal transfer stage in Embodiment 1; Figure 6 This is the front view of the lifting arm separating the swing rod and the model in Example 1; Figure 7 This is a schematic diagram showing the position of the damping ring in the lifting arm in Example 1; Figure 8 This is an exploded view of the model and fixture in Example 1; Figure 9 This is a schematic diagram of the lens after polishing in Example 1; Figure 10 This is a schematic diagram of the grinding machine in Example 2; Figure 11 This is a schematic diagram of the grinding machine in Example 3.

[0030] In the picture: 1. Rack; 2. Horizontal moving stage; 21. Chuck; 31. Sliding sleeve; 32. Sliding rod; 41. Drive motor; 42. Moving part; 43. Metal block; 44. Vertical surface; 45. Slider; 46. Slide rail; 47. Contact switch; 5. Magnetic components; 61. Grinding stone; 62. V-shaped grinding stone; 63. Lifting sensor; 71. Electromagnet; 72. Switch button; 8. Fixture; 81. Insert block; 82. Insertion hole; 9. Angle sensor; 91. Rotating rod; 92. Swing rod; 93. Crossbar; 94. Torsion spring; 95. Support rod; 101. Lens; 102. Model; 200. Lifting arm; 201. Damping ring; 202. Magnetic block; 300. Air pump; 301. Air outlet pipe; 302. Air inlet pipe; 303. Baffle. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Example 1, a lens polishing machine, referring to Figure 1 , Figure 5 It includes a frame 1, and the bottom of the frame 1 is provided with 5 support rods.

[0033] The frame 1 has a horizontal moving stage 2 that slides along it; the horizontal moving stage includes a chuck 21 for clamping the eyeglass lens 101 and a clamp 8 for clamping the model 102, and drives the lens 101 and the model 102 to rotate synchronously.

[0034] First, the fixing structure of the horizontal moving stage 2 for model 102 and lens 101 is described as follows: Reference Figure 5 The chuck 21 includes two coaxial and laterally arranged push rods. The opposing ends of the two push rods fix the chuck 21, which positions and clamps the lens 101. A clamp 8 is installed at the other end of the push rod on the left side. The clamp 8 fixes the model 102. The model 102 and the lens 101 are fixed by the coaxial push rods, so when the push rods rotate, the model 102 and the lens 101 can rotate synchronously.

[0035] For the structural reference of fixture 8 Figure 8 The fixture 8 includes a plug block 81 and a socket 82 for the model 102 to be inserted. There are two sockets 82. The plug block 81 is a cylindrical structure or a cylindrical structure. The two sockets 82 are round holes. The diameter of the sockets 82 is smaller than the diameter of the plug block 81, and the two sockets 82 are located on both sides of the plug block 81.

[0036] The model 102 has a rod with an insertion hole 82 and a hole into which the insertion block 81 is inserted. The model 102 is fixed in the clamp 8 by the mutual insertion and fixing relationship between the model 102 and the clamp 8.

[0037] Model 102 can be detached from clamp 8 by pulling it out.

[0038] After the above-described structure completes the installation of model 102 and lens 101 on the horizontal moving stage 2, the horizontal moving stage 2 moves horizontally on the grinding station. The sliding relationship of the movement is described as follows: Reference Figure 2 The specific sliding relationship between the frame 1 and the horizontal moving stage 2 is as follows: the frame 1 is fixed with a sliding sleeve 31, and the horizontal moving stage 2 is fixed with a sliding rod 32. The sliding rod 32 slides through the sliding sleeve 31, and the sliding rod 32 and the sliding sleeve 31 are in clearance fit. Therefore, relying on the sliding relationship between the sliding rod 32 and the sliding sleeve 31, the horizontal moving stage 2 can move back and forth horizontally on the frame 1. The horizontal movement of the horizontal moving stage 2 is for adjusting the grinding position of the lens 101.

[0039] The structure of the grinding station is described as follows: Figure 1 and Figure 2 The frame 1 is equipped with a rotating shaft, on which a grinding stone 61 and a V-shaped grinding stone 62 are fixed. The grinding stone 61 and the V-shaped grinding stone 62 are arranged coaxially. The grinding stone 61 cuts the lens 101 into the required shape according to the model 102, while the V-shaped grinding stone 62 has a V-shaped groove in the middle. The grinding stone 61 and the V-shaped grinding stone 62 are fixed by the same rotating shaft, and the rotating shaft rotates synchronously under the drive of a motor.

[0040] When polishing, the outer contour of the lens 101 is first ground. When the lens 101 is placed on the grinding stone 61, it is used to grind the outer contour.

[0041] The grinding stone 61 generally has two types: coarse grinding stone and fine grinding stone. The initial lens 101 is generally circular. After the initial lens 101 is coarsely ground to achieve the shape of the lens 101 model 102, the lens 101 is quickly moved above the fine grinding stone by the rapidly moving horizontal stage 2. The fine grinding stone then refines the edges of the lens 101. Since both the coarse and fine grinding stones grind the outer edges of the lens 101, this process is called primary grinding.

[0042] Reference Figures 2-3 In the first grinding stone process, a lifting sensor 63 is installed on a horizontal transfer table. The lifting sensor 63 is located at the lower end of the model 102. The lifting sensor 63 senses the vertical position of the bottom of the model 102 and controls the grinding stone 61 to complete the grinding of the outer contour of the lens 101. This structure is a conventional technology in the field and will not be described in detail here.

[0043] After the first grinding, the lens 101 needs to be ground a second time on the side of the lens 101 using a V-shaped grinding stone 62.

[0044] The secondary grinding of the side of lens 101 is carried out by the contour scanning positioning component of model 102 and the grinding position control mechanism.

[0045] (1) The structure of the grinding position control mechanism is as follows: Reference Figures 2-4During the secondary grinding of the side of lens 101, lens 101 is located in the V-groove of V-shaped grinding stone 62. The side of lens 101 needs to move towards the side wall of the V-groove at a high frequency to achieve the purpose of thinning the side of lens 101. In the secondary grinding of the side, lens 101 itself is rotating. The degree of thinning of different positions of lens 101 is different. Therefore, when lens 101 is ground on V-shaped grinding stone 62, it needs to make a fine and high-frequency horizontal movement so that the side of lens 101 presents a thinner arc surface.

[0046] When grinding with the V-shaped grinding stone 62, more precise movement of the horizontal moving stage 2 is required. In this design, a lead screw assembly is used to achieve the following specific structure: In terms of orientation, the V-shaped grinding stone 62 is located on the front side of the frame 1, and the lead screw assembly is located on the rear side of the frame 1.

[0047] The lead screw assembly includes a drive motor 41 and a reciprocating moving part 42. The drive motor 41 is a through-type lead screw motor, which is a stepper motor. The moving part 42 is a lead screw component that passes through the lead screw stepper motor. The moving part 42 is a threaded rod with a small thread pitch.

[0048] The through-type lead screw motor is fixed to the outer wall of the sliding sleeve 31, which means that the drive motor 41 and the frame 1 are fixed. Therefore, when the through-type lead screw motor is started, the lead screw can move back and forth.

[0049] A slider 45 is fixed to one end of the lead screw. The frame 1 has a groove 46, the length of which is parallel to the length of the lead screw. A protrusion is fixed to the side of the slider 45, and the protrusion slides in the groove 46. The slider 45 moves synchronously with the lead screw along the groove 46.

[0050] It is obvious that fine-tuning can be achieved through the lead screw assembly. The other end of the lead screw is fixed with a magnetic metal block 43, which is cylindrical.

[0051] The horizontal moving stage 2 has a fixed ear plate, on which a magnetic component 5 is fixed. The magnetic component 5 is a powerful magnet. The magnetic component 5 is disc-shaped. The end faces of the metal block 43 and the magnetic component 5 are circular vertical surfaces 44, and these two vertical surfaces 44 are magnetic attraction surfaces.

[0052] When the metal block 43 and the magnetic component 5 are attracted to each other, the back-and-forth movement of the lead screw assembly can drive the horizontal moving table 2 to make fine adjustments and translations on the frame 1.

[0053] The frame 1 is equipped with a contact switch 47 that triggers the through-type lead screw motor to stop when the slider 45 is reset.

[0054] The contact switch 47 is equipped with a pressure plate, on which a roller is mounted. When the slider 45 squeezes the roller, the pressure plate presses the elastic button of the contact switch 47, and the contact switch 47 sends a signal to the drive motor 41, causing the drive motor 41 to turn off. At this time, the metal block 43 moves away to the initial position where it maintains the furthest distance from the magnetic component 5.

[0055] The working principle of the grinding position control mechanism: After the initial lens 101 is clamped on the horizontal moving stage 2, the magnetic component 5 and the metal block 43 are separated. Therefore, the worker can manually move the horizontal moving stage 2 quickly. In other embodiments, the horizontal moving stage 2 can also adopt a rack and pinion linkage relationship, and move quickly above the grinding stone 61 under the drive of a motor to complete the rapid positioning of the grinding stone 61. The initial lens 101 moves to the grinding stone 61 and performs shape grinding according to the model 102. Afterwards, the lead screw assembly is activated, and the lead screw extends to the work position that cooperates with the V-shaped grinding stone 62, moving the horizontal moving table 2 so that the metal block 43 and the magnetic component 5 are magnetically attracted and fixed. At this time, the fine adjustment movement of the lead screw assembly can make the lens 101 for external grinding thin and grind within the V-shape.

[0056] The advantage of this design is that it allows the lens 101 to move quickly and over a large range horizontally during the outer surface grinding and to make fine adjustments horizontally during the side arc grinding. These two horizontal movement modes with different levels of precision coexist, and the two grinding modes can be freely switched during horizontal movement through a magnetic connection.

[0057] (2) The structure of the contour scanning and positioning component of model 102 is as follows: After the outer contour of lens 101 is ground, the sides of lens 101 need to be thinned. Because the amount of grinding required varies at different locations along the edge of lens 101, it is necessary to scan the edges of model 102. The specific structure is as follows: Reference Figures 5-7 An angle sensor 9 for detecting the rotation of the vertical plane 44 is installed on the horizontal transfer table. The angle sensor 9 includes a rotating rod 91, and a swing rod 92 that rotates downward under the action of gravity is fixed to the rotating rod 91. The swing rod 92 rotates downward under its own weight. Therefore, the end of the swing rod 92 away from the angle sensor 9 is exactly in contact with the upper end of the model 102 in the fixture 8. The angle sensor 9 detects the angle of the edge of the model 102 by the swing of the swing rod 92.

[0058] Since model 102 and lens 101 rotate synchronously, scanning and positioning the edge of model 102 is equivalent to scanning and positioning the edge of lens 101.

[0059] As model 102 rotates, the swing rod 92 swings to different degrees along the contour of model 102, causing the angle sensor 9 to record the angle data values ​​of each point on model 102, thus completing the shape scanning and positioning of the contour of model 102. Angle sensor 9 is connected to the control system and transmits the detected angle data to the control system to form a contour graphic. The control system stores the amount of cutting of each point of the contour of model 102 by V-shaped grinding stone 62. Therefore, the control system controls the horizontal transfer stage to perform a slight translation relative to V-shaped grinding stone 62, so that the side of lens 101 contacts the V-shaped groove wall of V-shaped grinding stone 62 to complete the grinding of the side.

[0060] A horizontal bar 93 is fixed to one end of the swing rod 92 that abuts against the model 102. The length of the horizontal bar 93 is 12 times the thickness of the model 102. The length direction of the horizontal bar 93 is consistent with the thickness direction of the model 102. The horizontal bar 93 abuts against the upper end of the model 102.

[0061] The swing arm 92 and the crossbar 93 are metal rods, both formed by bending.

[0062] The rotating rod 91 is equipped with a torsion spring 94 that drives the swing rod 92 to press against the model 102 in the fixture 8. The torsion spring 94 is sleeved on the rotating rod 91. A support rod 95 is fixed to the outer wall of the rotating rod 91. One end of the torsion spring 94 is fixed to the horizontal transfer table, and the other end of the torsion spring 94 abuts against the support rod 95.

[0063] The torsion spring 94 provides a continuous driving force to the rotating rod 91, which causes the rotating rod 91 to have a tendency to rotate toward the fixture 8. The purpose is to ensure that the crossbar 93 and the model 102 can fit tightly together when the rotating rod 91 is performing scanning detection.

[0064] After the edge scanning of model 102 is completed, the swing rod 92 should be separated from model 102. At this time, the swing rod 92 needs to be lifted. The specific structure is as follows: Reference Figures 5-7 A lifting arm 200 is rotatably connected to the outer wall of the horizontal transfer table. The lifting arm 200 has a Z-shaped structure. One end of the lifting arm 200 is rotatably connected to the horizontal transfer table, and a damping ring 201 is fitted on this end of the lifting arm 200. The damping ring 201 is a rubber ring. The damping effect of the damping ring 201 can overcome the weight of the lifting arm 200 itself and the elastic force of the torsion spring 94, so that the lifting arm 200 can remain stopped at the rotating stop position.

[0065] When the swing arm 92 is performing angle scanning detection on the model 102, the lifting arm 200 is located below the swing arm 92; After the swing arm 92 finishes performing angle scanning detection on the model 102, the lifting arm 200 rotates upward, and the crossbar 93 comes into contact with the top of the lifting arm 200. Therefore, the crossbar 93 and the swing arm 92 are lifted upward away from the model 102 by the lifting arm 200.

[0066] A magnetic block 202 is fixed on the side of the lifting arm 200 that is used to contact the swing rod 92. The magnetic block 202 is a disc-shaped magnet. When the lifting arm 200 lifts the swing rod 92, the swing rod 92 and the magnetic block 202 are magnetically attracted to each other and fixed.

[0067] The working principle of the contour scanning and positioning component of model 102: The angle of the edge of model 102 is detected by the swing rod 92 to complete the scanning and positioning of the edge of lens 101, so that the control system can accurately perform side thinning of lens 101.

[0068] Therefore, following the lens 101 operating procedure, refer to... Figure 9 The initial lens 101 is circular (9a). The lens 101 is first profiled by grinding and cutting (9b), and then the edges and sides of the profiled lens 101 are ground into an arc shape (9c).

[0069] The key design point in this design is the grinding process of the side of the lens 101 in (9b) to (9c). By using the lead screw assembly that independently drives the horizontal moving stage 2 to make horizontal fine-tuning movements and scanning and positioning the contour of the lens 101, the side of the lens 101 can be effectively ground.

[0070] Example 2, a lens polishing machine, differs from Example 1 in that, see below. Figure 10 The magnetic component 5 is an electromagnet 71, which is mounted on the ear plate. A switch 72 for synchronous operation is provided for the electromagnet 71 and the drive motor 41. The switch 72 connects the power supplies of both the electromagnet 71 and the drive motor 41 in series, serving as the master switch for both power supplies. When the switch 72 is activated, the magnetic component 5 is energized and becomes magnetic, and the drive motor 41 can start according to the program. When the switch 72 is deactivated, the magnetic component 5 is demagnetized, and the drive motor 41 stops rotating.

[0071] Example 3, a lens polishing machine, differs from Example 1 or Example 2 in that, see below. Figure 11 The frame 1 is equipped with an air pump 300, which includes a housing fixed to the frame 1 and blades mounted on a rotating shaft. The blades rotate within the housing to generate airflow for suction. The housing of the air pump 300 is fixed to the frame 1, and the power shaft of the air pump 300 is the rotating shaft of the grinding stone. A vertical baffle 303 is fixed on the frame 1, separating the grinding stone and the air pump 300, so that the air pump 300, its inlet pipe 302, and its outlet pipe 301 are all located on the other side of the grinding stone.

[0072] The air inlet pipe 302 of the air pump 300 is located at the edge of the frame 1, and an air filter is installed on the air inlet pipe 302 of the air pump 300 to reduce dust entering the air inlet pipe 302. The air outlet pipe 301 of the air pump 300 faces the edge of the model 102 in the fixture 8, and the air outlet pipe 301 is set downward. The air outlet pipe 301 and the swing rod 92 are located on both sides of the model 102.

[0073] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

[0074] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A lens polishing machine, comprising a frame (1), wherein a horizontal transfer stage is slidably mounted on the frame (1), the horizontal transfer stage comprising a chuck (21) for clamping spectacle lenses (101) and a clamp (8) for clamping a model (102), characterized in that: The frame (1) is equipped with a lead screw assembly, which includes a drive motor (41) and a reciprocating moving part (42). The horizontal moving table (2) is fixed with a magnetic part (5) for magnetically attracting and moving the moving part (42) to drive the horizontal moving table (2) to move back and forth. The horizontal transfer table is equipped with an angle sensor (9) for detecting the rotation of the vertical plane (44). The angle sensor (9) includes a rotating rod (91). The rotating rod (91) is fixed with a swing rod (92) that rotates downward under the action of gravity. One end of the swing rod (92) abuts against the upper end of the model (102) in the fixture (8). A lifting arm (200) is rotatably connected to the outer wall of the horizontal transfer table. The lifting arm (200) is equipped with a damping ring (201) to achieve positioning at the stop position. The lifting arm (200) is located below the swing rod (92). When the lifting arm (200) rotates upward, the lifting arm (200) lifts the swing rod (92) to separate the swing rod (92) from the model (102) in the fixture (8); a magnetic block (202) for magnetically attracting the swing rod (92) is fixed on the side of the lifting arm (200) that is used to contact the swing rod (92).

2. The lens polishing machine according to claim 1, characterized in that: The drive motor (41) is a through-type lead screw motor, and the moving part (42) is a lead screw part that passes through the through-type lead screw motor; A slider (45) is fixed at one end of the lead screw, and a groove (46) is provided on the frame (1). The length direction of the groove (46) is parallel to the length direction of the lead screw, and the slider (45) slides in the groove (46). The other end of the lead screw is fixed with a magnetic metal block (43).

3. The lens polishing machine according to claim 2, characterized in that: The frame (1) is equipped with a contact switch (47) that triggers the through-type lead screw motor to stop when the slider (45) is reset.

4. The lens polishing machine according to claim 1, characterized in that: The magnetic attraction surfaces of both the magnetic component (5) and the movable component (42) are flat vertical surfaces (44).

5. The lens polishing machine according to claim 1, characterized in that: The magnetic component (5) is a powerful magnet.

6. The lens polishing machine according to claim 1, characterized in that: The magnetic component (5) is an electromagnet (71), and the electromagnet (71) and the drive motor (41) are equipped with a switch button (72) for synchronous opening and closing.

7. The lens polishing machine according to claim 1, characterized in that: A horizontal bar (93) is fixed to one end of the swing rod (92) that abuts against the model (102). The length of the horizontal bar (93) is at least 3 times the thickness of the model (102). The length direction of the horizontal bar (93) is consistent with the thickness direction of the model (102). The horizontal bar (93) abuts against the upper end of the model (102).

8. The lens polishing machine according to claim 1, characterized in that: The rotating rod (91) is equipped with a torsion spring (94) that drives the swing rod (92) to press against the model (102) in the fixture (8). The torsion spring (94) is sleeved on the rotating rod (91). A support rod (95) is fixed on the outer wall of the rotating rod (91). One end of the torsion spring (94) is fixed to the horizontal transfer table, and the other end of the torsion spring (94) abuts against the support rod (95).

9. The lens polishing machine according to claim 1, characterized in that: The frame (1) is provided with a rotating shaft, on which grinding stones (61) and V-shaped grinding stones (62) are fixed. The frame (1) is equipped with an air pump (300), which includes a housing fixed to the frame (1) and blades installed on the rotating shaft. The air outlet pipe (301) of the air pump (300) faces the edge of the model (102) in the fixture (8), and the air outlet pipe (301) is set downward. The air outlet pipe (301) and the swing rod (92) are located on both sides of the model (102). The frame (1) is fixed with a baffle (303), the grinding stone (61) and the V-shaped grinding stone (62) are located on one side of the baffle (303), and the air inlet pipe (302) of the air pump (300) is located on the other side of the baffle (303).

Images