Lens edge grinding machine

Abstract

The utility model discloses a lens edge grinding machine which comprises a sliding frame, a pair of lens fixing shafts are rotatably fixed on the sliding frame, and the positions of the lens fixing shafts are moved so as to clamp a lens to be processed. A lens rotation motor for rotating the lens fixing shaft; a frame drive device for moving a frame and an apparatus for measuring the curvature of a lens. The lens edge grinding machine not only can measure the curvature of the lens through an accurate and simple mechanism, but also has a simple mechanical structure and can be produced at low cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of lens processing, and in particular relates to a lens edge grinding machine. Background Art

[0002] Before use, the lens usually needs to be trimmed with a lens trimmer to adjust its overall shape, such as forming a groove on the edge of the lens for fixing the lens fixing line, chamfering the edge of the lens, etc. Figure 1 This is the structural diagram of the existing lens trimming machine. Figure 2 : is a perspective view of the internal structure of an existing lens trimming machine. Figure 1 The lens trimmer shown in the figure has an opening window formed on its upper part, two for mounting the eyeglass lenses inside the lens trimmer, and several control switches 3 for controlling the lens trimmer. Figure 2 As shown, the lens edger includes a pair of lens fixing shafts 10 for fixing the blank eyeglass lens to be processed, a lens fixing shaft 10 for fixing the eyeglass lens to be processed, a carriage 12 rotatably fixing the lens fixing shaft 10 and moving the lens fixing shaft 10, and a lens rotating motor 13 for rotating the lens fixing shaft 10. A carriage moving shaft 14, which is attached to one end of the carriage 12, is used to allow the rotational movement of the carriage 12 around the axis 14 and the sliding movement of the carriage 12 in the longitudinal direction of the axis 14; a horizontal driving device 16, which is installed on one side of the carriage 12 to slideably move the carriage 12 in the longitudinal direction of the carriage moving shaft 14; a vertical driving device 18, which is installed on the other side of the carriage 12, is used to rotate the carriage 12 along the rotation direction of the carriage moving shaft 14. In addition, the lens edger also includes a diamond grinding wheel 20 for grinding the eyeglass lens clamped by the lens fixing shaft 10 into a groove of a desired shape, and a groove forming part 30 for forming a groove on the edge side of the lens.

[0003] In operation, a lens is clamped between a pair of lens fixing shafts 10, and a portion of the lens to be ground is guided to the diamond grinding wheel 20 by driving the lens rotating motor 13. The horizontal driving device 16 and the vertical driving device 18 move the carriage 12 in the horizontal direction and the vertical direction so that the lens clamped by the lens fixing shaft 10 is in contact with the diamond grinding wheel 20. Then, the lens is ground by rotating the diamond grinding wheel 20 at a high speed, and after the overall shape of the lens is processed, the carriage 12 is moved so that the processed lens is in contact with the groove forming member 30 to perform a groove opening operation, a chamfering operation or a bevel forming operation on the edge side of the lens.

[0004] In order to perform accurate and precise grooving, chamfering or chamfering forming operations, the curvature of the processed lens should be accurately measured using a device for measuring the curvature of the lens and the movement of the carriage 12. During the grooving, chamfering or chamfering processing, it should be accurately controlled according to the measured curvature. If the curvature of the lens is not taken into account in these operations, the processed lens may not be accurately fitted into the eyeglass frame, and the shape of the lens with the groove, bevel or chamfered portion may be unsatisfactory. Utility Model Content

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a lens trimming machine for measuring the curvature of the lens. The lens trimming machine can not only measure the curvature of the lens with an accurate and simple mechanism, but also has a simple mechanical structure and can be produced at low cost.

[0006] A lens edge grinding machine, comprising:

[0007] a carriage that rotatably fixes a pair of lens fixing shafts and moves the positions of the lens fixing shafts to clamp the lens to be processed;

[0008] A lens rotation motor, used to rotate the lens fixing shaft;

[0009] a carriage drive for moving the carriage and a device for measuring the curvature of the lens;

[0010] Among them, the equipment used to measure the curvature of the lens includes:

[0011] a curvature tracer that contacts the side of the lens and detects the curvature of the lens by moving horizontally according to the curvature of the lens during rotation of the lens;

[0012] a curvature tracker rotator which rotates the curvature tracker to a position for measuring the curvature of the lens and is inserted into one end of the curvature tracker in a manner allowing the curvature tracker to slide and move in a horizontal direction;

[0013] A slider base guides the movement of the curvature tracker in the horizontal direction and provides a restoring force to the curvature tracker, so that the lens and the curvature tracker can be kept in a contact state.

[0014] As a further definition of the present invention, the curvature tracker rotator has a groove-shaped protrusion, the curvature tracer is connected to the tracer rotating motor, the tracer rotating motor is used to rotate the slit-shaped protrusion, and the rotating slit plate formed at the end of the curvature tracer is inserted into the slit of the slit-shaped protrusion.

[0015] As a further limitation of the present invention, the curvature tracer comprises:

[0016] a pair of detection heads formed to be opposite to each other, the detection heads being in contact with each side of the lens to detect the curvature of the contacting side;

[0017] A detection head bracket, used for supporting the detection head;

[0018] a tracer shaft for rotating the detection probe and the probe holder;

[0019] A rotating slot plate is attached to the end of the tracer shaft and inserted into the curvature tracer rotator.

[0020] As a further limitation of the present invention, the curvature tracker is mounted on a slide and moves horizontally together with the slide. A first sliding guide is provided on the slide. The slider base includes a base frame and a second sliding guide and is engaged with the first sliding guide rail on the base frame.

[0021] As a further limitation of the present invention, a first stopper is provided below the slide plate, a pair of rods are pivotally connected on the base frame in a mutually facing manner, the pair of rods are connected by elastic material, and the first stopper is inserted between the pair of rods.

[0022] As a further limitation of the present invention, the rod is supported by a second stopper formed on the base frame and located between the pair of rods.

[0023] As a further limitation of the present invention, a tension spring is further included, one end of which is connected to the slider base, and the other end of which is connected to the curvature tracker to pull the curvature tracker along the rotation direction.

[0024] Beneficial effects:

[0025] The lens trimming machine of the utility model has a device for measuring the curvature of the lens, which can not only measure the curvature of the lens with an accurate and simple mechanism, but also has a simple mechanical structure and can be produced at a low cost, and has good durability, less possibility of mechanical failure and can be easily assembled and disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The structure diagram of the existing lens trimming machine is shown below;

[0027] Figure 2 A perspective view of the internal structure of a conventional lens edger;

[0028] Figure 3 It is a perspective view of the internal structure of the lens edge grinding machine of the utility model;

[0029] Figure 4 It is a side view of the internal structure of the lens edge grinding machine of the utility model;

[0030] Figure 5 A perspective view of a groove forming component of a lens edge grinding machine of the present invention;

[0031] Figure 6 It is a partial exploded perspective view of a device for measuring the curvature of a lens used in the lens edge grinding machine of the present invention. DETAILED DESCRIPTION

[0032] The following describes in detail the technical content and features of the utility model by listing preferred embodiments with accompanying drawings. Those skilled in the art will understand that the descriptive terms of this embodiment belong to a general description that does not limit the application field such as solar power generation modules. For example, material or shape terms include but are not limited to the materials or shapes specified by the description content, and position terms include but are not limited to setting, proximity, connection, or adjacency. The quantity term "one" of each element includes one and more than one plural number of elements. Directional descriptive terms such as "upper", "lower", "inside", "outside", "top", and "bottom" mentioned in this specification are only illustrative descriptive terms based on the normal use direction, and are not intended to limit the scope of the claim.

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] See also Figure 3 and Figure 4 The lens edger of the present invention comprises a pair of lens fixing shafts 10, a carriage 12, a carriage driving device consisting of a horizontal driving device 16 and a vertical driving device 18, a lens rotating motor 13, and a lens bending measuring device 40. If necessary, the lens edger further comprises a groove forming component 30 and / or a grinding wheel 20.

[0035] The slide 12 rotatably fixes the lens fixing shaft 10, and is capable of moving the lens clamped by the lens fixing shaft 10 for processing, and a slide moving shaft 14 is connected to one end of the slide 12. The slide 12 rotates along the rotation direction of the slide moving shaft 14 together with the lens fixing shaft 10, and slides along the longitudinal direction (i.e., the axis) of the slide moving shaft 14 together with the lens fixing shaft 10. In operation, the lens is clamped between the lens fixing shafts 10; then, the lens rotating motor 13 is operated to rotate the lens fixing shaft 10, thereby guiding a portion of the lens to be ground to the grinding wheel 20.

[0036] After the portions of the lens to be ground are guided to the grinding wheel 20, the horizontal moving device 16 and the vertical moving device 18 are operated to move the slide 12 horizontally and vertically, and the lens clamped by the lens fixing shaft 10 contacts the grinding wheel 20, which rotates at a high speed to grind the lens into a desired shape.

[0037] Specifically, the horizontal moving device 16 moves the carriage 12 horizontally, that is, moves along the longitudinal direction of the carriage moving shaft 14, and the horizontal moving device 16 may include a horizontal moving motor 162 and a horizontal moving screw 164 mounted on the base plate 100, and the horizontal moving screw 164 is threadedly connected to one side of the carriage 12. Due to the threaded connection between the carriage 12 and the horizontal moving screw 164, the carriage 12 moves horizontally as the horizontal moving screw 164 rotates.

[0038] The vertical moving device 18 moves the carriage 12 upward or downward, that is, in the rotation direction of the carriage moving shaft 14 .

[0039] The vertical moving device 18 may include a vertical moving motor 182 mounted on the base plate 100 and a vertical moving screw 184 rotated therethrough. The vertical moving screw 184 is threadedly connected to a position control block 183. The position control block 183 supports the carriage 12, and a direction guide 145 for guiding the movement of the carriage 12 relative to the position control block 183 is formed on the position control block 183.

[0040] Due to the threaded connection between the position control block 183 and the vertical adjustment screw 184, and also because the direction guide 145 limits the moving direction of the slide 12 relative to the position control block 183, the slide 12 supported by the position control block 183 can move upward or downward, and more specifically, rotate around the slide moving axis 14.

[0041] When the slide 12 moves upward and is located in the upper position, the lens is clamped between the lens fixing shafts 10; then, the slide 12 moves downward until the lens clamped in the slide 12 contacts the grinding wheel 20. At this time, the lens is supported by the grinding wheel 20, so the lens and the slide 12 no longer move downward. Thereafter, the position control block 183 is connected to the vertical moving screw 184 and further moves downward by a distance (hereinafter referred to as the "gap distance"), which is equal to the required lens grinding thickness. Therefore, the slide 12 and the position control block 183 are disengaged from the gap distance, and then, the grinding wheel 20 rotates to grind the lens, and as the lens is ground, the slide 12 moves downward under the action of gravity. When the downwardly moving slide 12 operates the contact switch 147 installed on the position control block 183, the rotation of the grinding wheel 20 stops, and the lens grinding is completed.

[0042] After the overall shape of the lens is processed through the above steps, the processed lens is moved to a position for measuring the curvature of the lens. The lens curvature is measured using the device 40 for measuring the curvature of the lens. After the lens curvature is measured, the processed lens is moved so that the edge side of the lens is in contact with the groove forming member 30, and the groove, chamfering or bevel forming operation is performed while the carriage 12 is horizontally moved according to the measured lens curvature.

[0043] like Figure 5 As shown, the groove forming member 30 includes a processing wheel 32 and a rotary motor 34 mounted on a body 36. The processing wheel 32 is connected to the rotary motor 34 through a power transmission device such as a gear, a belt, etc. Therefore, the processing wheel 32 is driven to rotate by the rotary motor 34 and forms a groove, or forms a bevel on the edge side of the lens 50 or forms a chamfer on the edge side of the lens 50.

[0044] like Figure 6 As shown, the apparatus 40 for measuring the curvature of a lens includes a curvature tracer 41, a curvature tracer rotator 44 and a slider base 43;

[0045] Among them, the curvature tracer 41 contacts one side of the lens 50 and detects the curvature of the lens 50. The curvature tracer rotator 44 rotates the curvature tracer 41 to a position for measuring the curvature of the lens. One end of the curvature tracer 41 is inserted into the curvature tracer rotator 44 in a manner that allows the curvature tracer 41 to slide in the horizontal direction. The slider base 43 guides the curvature tracer 41 to move in the horizontal direction, and provides a restoring force so that the lens 50 and the curvature tracer 41 can be maintained in a contact state.

[0046] Hereinafter, the apparatus 40 for measuring the curvature of a lens will be described in more detail. The curvature tracer rotator 44 includes a groove-shaped protrusion 443 and a tracer rotation motor 440. The rotating groove plate 413 is inserted into the groove-shaped protrusion 443 at the end of the curvature tracer 41 so that the rotating groove plate 413 can be slidably moved in the horizontal direction (i.e., the x direction). The tracer rotation motor 440 rotates the groove-shaped protrusion 443 through a power transmission device such as a gear.

[0047] For example, the curvature tracer rotator 44 may include a worm gear 441 and a housing 442 for supporting the worm gear 441 .

[0048] The curvature tracer 41 includes a pair of detection heads 410 disposed facing each other, a detection head bracket 411, a tracer axis 412, and a rotating slot plate 413. The pair of detection heads 410 disposed facing each other allows each detection head 410 to contact each side of the lens 50 to detect the curvature of the contact side. The detection head bracket 411 is configured to support the detection head 410. The tracer axis 412 is connected to the detection head bracket 411 and is configured to rotate the detection head 410 and the detection head bracket 411. The rotating slot plate 413 is connected to the end of the tracer axis 412 and is inserted into the groove of the protrusion 443.

[0049] As the tracer rotating motor 440 rotates, the rotating slot plate 413 rotates, and the curvature tracer 41 and the curvature tracer rotator 44 slidably engage the slot shown in the figure through the rotating slot plate 413. The curvature tracer 41 is mounted on the slide plate 421, and the slide plate 421 also moves horizontally together with the curvature tracer 41 ( Figure 6 On the slide plate 421, an axis holder 420 is provided to rotatably support the tracer axis 412. Below the slide plate 421, a first stopper 423 in a protruding shape is provided. On the side portion of the slide plate 421 extending along the x direction, a first sliding guide, such as a pair of first sliding guides 422, is provided.

[0050] The slider base 43 includes a base frame 431 and a second sliding guide, for example, a pair of second sliding guides 430. The second sliding guides 430 are formed on the upper and lower parts (along the y direction) of the base frame 431 to engage with the first sliding guide 422 of the slide plate 421 and guide the horizontal movement (along the x direction) of the second sliding guide 430. The slide plate 421 and the curvature tracer 41 are on the base frame 431, and a pair of rods 432 are pivotally connected to the base frame 431. At one end thereof, the rods 432 face each other. The rods 432 are connected with an elastic material 432b, such as a spring, so that an attractive force 432 is set between the pair of rods 432. The other end of the rod 432 is formed on the base frame 431, and the second stopper 432a prevents the rods 432 from contacting each other through the attractive force of the elastic material 432b, and does not deviate to one side.

[0051] A first stopper 423 having a protruding shape formed below the slide plate 421 is inserted between the other ends of the rods 432. Therefore, when the lens 50 pushes the curvature tracer 41 and the slide plate 421 to the left or right in the x direction, the first stopper 423 pushes the left or right rod 432 to widen the gap therebetween. Then, an attractive force 432b of the elastic material is provided to push the rod 432 to the left or right. In other words, the elastic material 432b provides a restoring force in the opposite direction of the movement of the curvature tracer 41, so that the detection head 410 of the curvature tracer 41 and the lens 50 are maintained in a state of being firmly in contact. While maintaining the contact state between the detection head 410 and the lens 50, the lens 50 is rotated, and the position of the curvature tracer 41 is measured using an encoder (not shown) to obtain the curvature of the lens 50.

[0052] Pushing the curvature tracer 41 by a predetermined distance in the direction of the detection head 410 to which the lens 50 is attached (i.e., in the left direction in the x direction);

[0053] Then, the first stopper 423 moving together with the curvature tracer 41 pushes the left rod 432 to the left, so that the gap between the two rods 432 increases; as the left rod 432 moves to the left, an attractive force is applied to the left rod 432 through the elastic material 432b. In other words, a rightward restoring force is generated for the left rod 432, and the contact between the left detection head 410 and the left side of the lens 50 can be firmly maintained.

[0054] During the rotation, the slide plate 421 of the curvature tracer 41 moves in the horizontal direction (x direction) according to the edge curvature of the left side of the lens 50, and the position of the curvature tracer 41 and / or the slide plate 421 is measured using an encoder. The curvature of the left side of the lens 50 can be obtained from the measurement position of the curvature tracer 41 and / or the slide plate 421. After obtaining the left side curvature 50 of the lens, the lens 50 is moved to the right direction so that the right side 50 of the lens pushes the detection head 410 on the right side a predetermined distance. Thereafter, in the aforementioned manner, the lens 50 is rotated to obtain the right side curvature 50 of the lens. After measuring the lens curvature, the lens 50 is moved to the groove forming member 30 to perform a grooving operation, a chamfering operation or a bevel forming operation.

[0055] In the present invention, the detection head 410 can closely contact the lens 50 during the 360-degree rotation of the lens 50, even if the curvature of the lens 50 changes at its circumferential edge. Therefore, the present invention can minimize the curvature measurement error.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. Lens edge grinding machine, characterized in that: include: a carriage that rotatably fixes a pair of lens fixing shafts and moves the positions of the lens fixing shafts to clamp the lens to be processed; A lens rotation motor, used to rotate the lens fixing shaft; a carriage drive for moving the carriage and a device for measuring the curvature of the lens; Among them, the equipment used to measure the curvature of the lens includes: a curvature tracer that contacts the side of the lens and detects the curvature of the lens by moving horizontally according to the curvature of the lens during rotation of the lens; a curvature tracker rotator which rotates the curvature tracker to a position for measuring the curvature of the lens and is inserted into one end of the curvature tracker in a manner allowing the curvature tracker to slide and move in a horizontal direction; A slider base guides the movement of the curvature tracker in the horizontal direction and provides a restoring force to the curvature tracker, so that the lens and the curvature tracker can be kept in a contact state.

2. The lens edge grinding machine according to claim 1, characterized in that: The curvature tracker rotator has a groove-shaped protrusion, the curvature tracer is connected to a tracer rotating motor, the tracer rotating motor is used to rotate the slit-shaped protrusion, and a rotating slit plate formed at the end of the curvature tracer is inserted into the slit of the slit-shaped protrusion.

3. The lens edge grinding machine according to claim 1, characterized in that: The curvature tracer comprises: a pair of detection heads formed to be opposite to each other, the detection heads being in contact with each side of the lens to detect the curvature of the contacting side; A detection head bracket, used for supporting the detection head; a tracer shaft for rotating the detection probe and the probe holder; A rotating slot plate is attached to the end of the tracer shaft and inserted into the curvature tracer rotator.

4. The lens edge grinding machine according to claim 1, characterized in that: The curvature tracker is mounted on the slide and moves horizontally together with the slide. A first sliding guide is arranged on the slide. The slider base includes a base frame and a second sliding guide and is engaged with the first sliding guide rail on the base frame.

5. The lens edge grinding machine according to claim 4, characterized in that: A first stopper is provided below the slide plate, a pair of rods are pivotally connected on the base frame in a manner of facing each other, the pair of rods are connected by elastic material, and the first stopper is inserted between the pair of rods.

6. The lens edge grinding machine according to claim 5, characterized in that: The rod is supported by a second stopper formed on the base frame and located between the pair of rods.

7. The lens edge grinding machine according to claim 1, characterized in that: A tension spring is also included, one end of which is connected to the slider base, and the other end of which is connected to the curvature tracker to pull the curvature tracker in the rotation direction.

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