Grinding machine for lens processing

Abstract

The invention relates to the field of grinding machines, in particular to a grinding machine for lens processing, which comprises a grinding machine body, a grinding assembly is arranged on the grinding machine body, a pushing assembly is arranged on the grinding machine body, a moving seat is arranged on the pushing assembly, a moving frame is arranged on the moving seat, the moving frame and the moving frame are in sliding connection, and a swinging assembly is arranged on the moving frame. A mounting shell is arranged on the swing assembly, and a lower pressing needle is arranged in the mounting shell. By arranging the pressure spring, the downward pressing needle, the abutting piece and the adjusting assembly, the downward moving stroke of the downward pressing needle can be adjusted according to the needed thickness of a lens, and after the lens is polished to the needed thickness, downward pressing of the lens is automatically stopped, and the purpose of stopping polishing is achieved; under the cooperation of the clamping mechanism, the air cylinder and the pressure sensor, after the plate body is abutted by the protruding block, the clamping mechanism automatically clamps the lens jig, then the air cylinder can control the downward pressing needle to drive the lens jig to be lifted upwards, and the purpose that the lens is automatically separated from the grinding disc can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of grinding machines, in particular to a grinding machine for lens processing. Background Art

[0002] During the lens processing process, in order to make the lens surface smooth and flat, the lens surface needs to be polished and ground, and currently a grinding machine is used for polishing.

[0003] The existing grinding machine is usually composed of a pressing component, a grinding component, a lens jig and other components. When polishing starts, the lens to be processed needs to be clamped into the lens jig, and then the lens jig is turned upside down on the grinding disc so that the surface of the lens to be ground faces and is close to the grinding surface. Subsequently, the pressing component is controlled to press down on the back of the lens jig, so that the lens jig remains in a pressed state, and the lens remains in a state of close contact with the grinding surface. Subsequently, the grinding component is started, and the bottom of the lens is ground by the grinding component. After grinding for a certain period of time, the staff will release the lens jig by the pressing component, and then take out the lens and use a thickness gauge to measure the thickness of the lens. If the thickness meets the required requirement, the grinding can be stopped. If it has not met the requirement, the lens needs to be placed in the lens jig and continued to be ground. In this way, the lens needs to be taken out for measurement each time the lens is ground, which is very troublesome and inefficient. For this reason, the present invention develops a grinding machine for lens processing to overcome the above defects. Summary of the Invention

[0004] Technical solution: A grinding machine for lens processing includes a grinding body, a grinding assembly is arranged on the grinding body, a pushing assembly is provided on the grinding body, a movable seat is provided on the pushing assembly, a movable frame is provided on the movable seat, the movable frames are slidably connected to each other, a swinging assembly is provided on the movable frame, a mounting shell is provided on the swinging assembly, and a pressing pin is provided inside the mounting shell.

[0005] In one embodiment, the top of the lower pressure needle is a plate structure, a pressure spring is provided on the lower pressure needle, the upper end of the pressure spring is fixedly connected to the plate position of the lower pressure needle, the pressure spring is fixedly connected to the inside of the mounting shell, the resisting member is slidably connected in the mounting shell, and a symmetrical protrusion is provided on the side of the resisting member close to the lower pressure needle, and the protrusion of the resisting member resists the plate position of the lower pressure needle.

[0006] In one embodiment, a screw rod is further included. The screw rod is arranged on the upper part of the mounting shell. The screw rod is rotatably connected to the mounting shell, and the screw rod is threadedly connected to the abutment.

[0007] In one embodiment, a gearbox is further included, which is arranged on the top of the mounting shell, the output shaft of the gearbox is fixedly connected to the screw, a worm gear is arranged on the input shaft of the gearbox, the worm gear engages with the worm, the worm is rotatably connected to the top of the mounting shell, and an adjusting wheel is arranged on the side of the worm away from the worm gear.

[0008] In one embodiment, a cylinder is further included. The cylinder is arranged on the top of the movable base, and the telescopic rod of the cylinder is movably connected to the movable frame through an inclined slot.

[0009] In one embodiment, it also includes an insert block, which is symmetrically arranged and slidably connected to the bottom of the lower pressure needle. A first wedge block is fixedly connected to one side of the insert blocks close to each other. A double-sided wedge block is arranged between the first wedge blocks. The double-sided wedge block and the first wedge block are squeezed together. A lifting frame is fixedly connected to the top of the double-sided wedge block. The lifting frame passes through the lower pressure needle longitudinally. The lifting frame and the lower pressure needle are slidably connected. The two sides of the upper part of the lifting frame are squeezed together with the protrusions. Two first springs are arranged on the top of the lifting frame. The top of the first spring is fixedly connected to the plate body. The second spring is connected between the outer side of the first wedge block and the lower pressure needle.

[0010] In one embodiment, a pressure sensor is further included. The pressure sensor is arranged on the top of the plate body. The pressure sensor and the cylinder are electrically connected through the control module. The pressure sensor and the lifting frame are squeeze-fitted.

[0011] In one embodiment, a material receiving frame is further included, and the material receiving frame is arranged on a side of the grinding machine body close to the grinding disc.

[0012] In one embodiment, a second wedge block is further included, which is fixedly connected to the front lower part of the lower pressing needle. A third wedge block is provided on the material receiving frame, and the third wedge block is squeezed and fitted with the second wedge block.

[0013] Beneficial effects: 1. The present invention can adjust the downward stroke of the pressing needle according to the required thickness of the lens by setting a pressure spring, a pressing needle, a resisting member and an adjusting assembly. After the lens is polished to the required thickness, the downward pressure on the lens is automatically stopped to achieve the purpose of stopping polishing.

[0014] 2. The present invention cooperates with the clamping mechanism, cylinder, and pressure sensor. After the plate is pressed by the protrusion, the clamping mechanism automatically clamps the lens fixture. Then the cylinder can control the pressing needle to drive the lens fixture upward, thereby achieving the purpose of automatically separating the lens from the grinding disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure from a second viewing angle of the present invention.

[0017] Figure 3 It is a partial three-dimensional structural schematic diagram of the present invention.

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the components such as the mounting shell, the pressure spring and the resisting member of the present invention.

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the pressing needle of the present invention.

[0020] Figure 6 For the present invention Figure 5 Schematic diagram of the three-dimensional structure at A in the middle.

[0021] Figure 7 For the present invention Figure 5 Schematic diagram of the three-dimensional structure at point B in the middle.

[0022] Marked in the figure: 1-grinding body, 2-grinding assembly, 3-pushing assembly, 4-moving seat, 5-moving frame, 6-pressing needle, 7-swinging assembly, 8-mounting shell, 9-pressure spring, 10-resisting part, 11-screw, 12-gearbox, 13-worm, 14-worm gear, 15-adjusting wheel, 16-cylinder, 17-insert block, 18-first wedge block, 19-double-sided wedge block, 20-lifting frame, 21-first spring, 22-second spring, 23-pressure sensor, 24-material receiving frame, 26-second wedge block, 27-third wedge block. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0024] A lens processing grinding machine, such as Figure 1-Figure 3 As shown, it includes a grinding machine body 1, on which a grinding assembly 2 for grinding the lens is provided. After the lens is clamped into the lens fixture, the lens fixture is turned upside down to press the lens surface against the grinding disk of the grinding assembly 2. Then the grinding assembly 2 can be started, and the grinding disk of the grinding assembly 2 rotates to grind the lens surface.

[0025] A pushing assembly 3 is provided on the grinding machine body 1, and a moving seat 4 is provided on the pushing assembly 3. The pushing assembly 3 is used to drive the moving seat 4 to move back and forth linearly, thereby achieving the purpose of driving the lens to move back and forth. The movement of the lens can cooperate with the rotation of the grinding disc to grind the lens.

[0026] A moving frame 5 is provided on the moving seat 4, and the moving frames 5 are slidably connected to each other. A swinging assembly 7 is provided on the moving frame 5, and a mounting shell 8 is provided on the swinging assembly 7. A pressing needle 6 is provided inside the mounting shell 8. The pressing needle 6 is used to press down the back of the lens jig to apply a downward force to the lens jig so as to fix the lens.

[0027] The mounting shell 8 and the pressing needle 6 can be controlled to swing left and right through the swinging assembly 7, and the left and right swinging of the pressing needle 6 will drive the lens fixture and the lens to swing left and right. Therefore, with the cooperation of the pushing assembly 3 and the swinging assembly 7, the lens can be continuously moved back and forth and left and right, which can make the lens grinding accuracy better.

[0028] The thickness of the lens has a great influence on the optical performance. Therefore, when grinding the lens, it is necessary to control the thickness of the lens. Accurately controlling the thickness of the lens can ensure that the curvature and optical parameters of the lens after grinding meet the requirements. At present, it is usually necessary to take out the lens and use a thickness gauge to measure the thickness of the lens. If the thickness meets the required requirements, the grinding can be stopped. If it has not met the requirements, the lens needs to be placed in the lens fixture and continued to be ground. In this way, the lens needs to be taken out for measurement every time the lens is ground, which is very troublesome and inefficient. Therefore, this embodiment overcomes the above defects by adopting the following solutions:

[0029] like Figure 4 As shown, the lower pressing needle 6 and the mounting shell 8 are slidably connected, the top of the lower pressing needle 6 is a plate structure, a pressure spring 9 is provided on the lower pressing needle 6, the upper end of the pressure spring 9 is fixedly connected to the plate position of the lower pressing needle 6, and the lower end of the pressure spring 9 is fixedly connected to the inside of the mounting shell 8.

[0030] The elastic force of the pressure spring 9 can keep the pressing needle 6 in a pressed-down state, so that the pressing needle 6 keeps pressing the lens fixture down, so that the lens is close to the grinding disc. If you want to control the thickness of the lens, you only need to control the thickness of the lens that is ground off.

[0031] During the grinding process, the lens will become thinner and thinner, and the lens fixture and the pressing needle 6 will also drop accordingly. The distance the pressing needle 6 drops is the thickness of the lens that is ground off. Therefore, people can control the thickness of the lens that is ground off by adjusting the maximum downward stroke of the pressing needle 6. The thickness that needs to be ground off is the stroke of the pressing needle 6, and the calculation method is as follows:

[0032] Before the lens is clamped into the lens fixture, the thickness of the lens before grinding is measured. The measured data is Amm, the required thickness is Bmm, and the thickness to be ground off (the stroke of the lower pressing needle 6) is (AB)mm.

[0033] After placing the lens into the lens jig, the pressing needle 6 can be manually moved up first. The pressure spring 9 is stretched to separate the bottom of the pressing needle 6 from the grinding disc. Then, the lens jig can be placed at the bottom of the pressing needle 6. Subsequently, the pressing needle 6 can be used to press the lens jig downward through the pressure spring 9. As the lens is polished, the pressing needle 6 will move downward. In order to limit the downward movement distance of the pressing needle 6, a component is required to limit the downward movement distance of the pressing needle 6, as described below:

[0034] like Figure 4 As shown, a resisting member 10 is provided in the mounting shell 8, and the resisting member 10 is slidably connected in the mounting shell 8. A symmetrical protrusion is provided on the side of the resisting member 10 close to the lower pressing needle 6. The protrusion of the resisting member 10 is against the plate position of the lower pressing needle 6, and is used to resist the lower pressing needle 6.

[0035] After the pressing needle 6 presses against the lens jig, the pressing member 10 can be adjusted downward through the adjustment assembly. When the gap between the top surface of the protrusion and the bottom of the plate is (AB) mm, the adjustment of the pressing member 10 can be stopped. Then, when the pressing needle 6 drives the plate to move downward, the plate is stopped by the protrusion, and the pressing needle 6 stops moving the lens jig and the lens downward. In this way, after the top of the lens is loosened, the grinding disc will not continue to grind the lens when it rotates.

[0036] It should be noted that a groove is set in the middle of the top of the lens jig, and the bottom of the pressing needle 6 is inserted into the groove to press the lens jig. After the lens is inserted into the lens jig, the surface of the lens needs to protrude from the lens jig. When the lens jig is inverted on the grinding disc, it needs to be suspended above the grinding disc, and the lens jig cannot contact the grinding disc.

[0037] In addition, after each lens polishing is completed, the abutment member 10 needs to be adjusted upward to the original position through the adjustment assembly so as to be adjusted for the next batch of lenses.

[0038] like Figure 4 As shown, the adjustment assembly includes a screw rod 11 , which is arranged on the upper part of the mounting shell 8 , the screw rod 11 and the mounting shell 8 are rotatably connected, and the screw rod 11 and the abutment member 10 are threadedly connected.

[0039] The screw 11 can be rotated to drive the abutment 10 to adjust longitudinally and linearly, thereby achieving the purpose of adjusting the abutment 10. Since the lens grinding is of high precision and its thickness is generally at the millimeter level, the screw 11 is a micron-level adjustment screw 11 with a pitch of 0.5mm.

[0040] It is difficult to adjust the stroke at the millimeter level by manually rotating the screw 11 alone. For this reason, a gearbox 12 is provided on the top of the mounting shell 8. The interior of the gearbox 12 is composed of multiple gears, racks and other components. The gearbox 12 is a prior art and will not be elaborated in this embodiment. The output shaft of the gearbox 12 is fixedly connected to the screw 11. By rotating the input shaft of the gearbox 12, the output shaft of the gearbox 12 can drive the screw 11 to rotate.

[0041] When the abutment 10 is adjusted to the specified position, if the plate moves downward and presses the convex block of the abutment 10, the position of the abutment 10 is not locked, and the downward pressure of the plate may push the abutment 10 to move, causing the abutment 10 to loosen. Figure 4 As shown, in this embodiment, a worm gear 14 is provided on the input shaft of the gearbox 12 , the worm gear 14 engages with a worm 13 , the worm 13 is rotatably connected to the top of the mounting housing 8 , and an adjusting wheel 15 is provided on the side of the worm 13 away from the worm gear 14 .

[0042] The worm wheel 14 and the worm 13 have a self-locking function, which can lock the resisting member 10. When the adjusting wheel 15 is rotated, the resisting member 10 can be driven to move by the worm 13, the worm wheel 14, the gearbox 12, and the screw 11. When the adjusting wheel 15 rotates one circle, the moving stroke of the resisting member 10 is 1 mm. In this way, the resisting member 10 can be adjusted by manually rotating the adjusting wheel 15.

[0043] The bottom of the pressing needle 6 only presses the lens jig. If the pressing needle 6 stops pressing down after the lens is polished to a specified thickness, and the top of the lens jig is released, while the grinding disc continues to rotate, the lens and the lens jig may move around due to friction. At the same time, the lens and the grinding disc continue to contact, which may easily affect the accuracy of the lens. Therefore, this embodiment adopts a solution of lifting the lens jig to overcome the above disadvantages, as follows:

[0044] like Figure 1 As shown, a cylinder 16 is provided on the top of the movable seat 4, and the telescopic rod of the cylinder 16 is movably connected to the movable frame 5 through an inclined slot, as shown in FIG. Figure 3 As shown in the figure, the telescopic rod of the cylinder 16 is in an extended state, and the movable frame 5 is in an upwardly lifted state. When the lens needs to be ground, it is necessary to control the telescopic rod of the cylinder 16 to be shortened, and the movable frame 5 and its upper components are all lowered to the working state through the inclined slot.

[0045] After the pressing needle 6 is stopped by the protrusion, the telescopic rod of the control cylinder 16 is extended to drive the movable frame 5 to move upward. The upward movement of the movable frame 5 will drive the swing assembly 7 and the pressing needle 6 to swing upward. A clamping mechanism is set under the pressing needle 6. The lens mechanism is clamped by the clamping mechanism. When the pressing needle 6 moves upward, the lens fixture and the lens can be lifted upward through the clamping mechanism.

[0046] Specifically, the clamping mechanism includes an insert block 17, which is symmetrically arranged and slidably connected to the bottom of the pressing needle 6. After the pressing needle 6 is stopped by the protrusion, the insert block 17 will move outward and insert into the periphery of the groove of the lens jig. The groove of the lens jig consists of a large diameter circular groove and a small diameter circular groove. The small diameter circular groove is arranged above the large diameter circular groove, and the position where the insert block 17 is inserted is the periphery of the large diameter circular groove. The top and bottom of the insert block 17 are blocked by the lens jig. Therefore, when the pressing needle 6 is lifted upward, the lens jig and the lens can be lifted together by the insert block 17.

[0047] Furthermore, if Figure 5-Figure 7As shown, the insert blocks 17 are fixedly connected to one side close to each other with a first wedge block 18, a double-sided wedge block 19 is arranged between the first wedge blocks 18, the double-sided wedge block 19 and the first wedge block 18 are squeezed together, and a lifting frame 20 is fixedly connected to the top of the double-sided wedge block 19, the lifting frame 20 longitudinally passes through the lower pressing needle 6, the lifting frame 20 and the lower pressing needle 6 are slidably connected, the upper two sides of the lifting frame 20 are squeezed together with the protrusions, two first springs 21 are arranged on the top of the lifting frame 20, the top of the first spring 21 is fixedly connected to the plate body, and a second spring 22 is connected between the outer side of the first wedge block 18 and the lower pressing needle 6.

[0048] When the plate moves downward and contacts the protrusion, the protrusion will first contact the lifting frame 20, and cause the lifting frame 20 to move upward along the inside of the lower pressure needle 6. The first spring 21 is compressed, and the lifting frame 20 drives the double-sided wedge block 19 to move upward. The upward movement of the double-sided wedge block 19 will squeeze the first wedge block 18, causing the first wedge block 18 to drive the insert block 17 to move outward and insert into the outer periphery of the groove, thereby restricting the lens jig. At this time, the second spring 22 is compressed.

[0049] Subsequently, the cylinder 16 needs to be started to control the lens jig to lift upward. For this purpose, a pressure sensor 23 is set at the top of the plate body. The pressure sensor 23 and the cylinder 16 are electrically connected through the control module. The pressure sensor 23 and the lifting frame 20 are squeezed together. When the lifting frame 20 moves up and contacts the pressure sensor 23, the pressure sensor 23 will send a signal to the cylinder 16, thereby starting the cylinder 16 and achieving the effect of lifting the lens jig.

[0050] After the lens jig is raised, people usually need to manually remove the lens jig. However, in order to improve the ease of use, this embodiment provides a material connection component to first connect the lens jig, and then release the lens jig through an unlocking mechanism.

[0051] like Figure 3 As shown, the material receiving assembly includes a material receiving frame 24, which is arranged on the side of the grinding machine body 1 close to the grinding disc. After the lens jig is raised, there is a distance between the lens jig and the grinding disc, and a power can be used to push the material receiving frame 24 to move backward. After the material receiving frame 24 moves to the bottom of the lens jig, the lens jig and the lens fall into the material receiving frame 24 through the unlocking mechanism, and then the material receiving frame 24 can be driven forward by a power to reset and take the lens jig forward.

[0052] like Figure 3 As shown, the unlocking mechanism includes a second wedge block 26, which is fixedly connected to the front lower position of the lower pressing needle 6, and a third wedge block 27 is provided on the material receiving frame 24, and the third wedge block 27 and the second wedge block 26 are squeezed together.

[0053] Then the material receiving frame 24 moves forward, which drives the lens jig and the third wedge block 27 to move forward. After the third wedge block 27 and the second wedge block 26 are separated, the lower pressing needle 6 will be automatically reset due to the elastic force of the pressure spring 9.

[0054] It should be noted that after one lens is ground, in order to facilitate the grinding of the next lens, the adjusting wheel 15 needs to be manually rotated in the opposite direction so that the adjusting wheel 15 drives the worm 13, worm wheel 14, gearbox 12 and screw 11 to rotate in the opposite direction and drive the supporting member 10 to move up to the initial state.

[0055] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

Claims

1. A lens processing grinding machine, comprising a grinding machine body (1), a grinding assembly (2) disposed on the grinding machine body (1), and characterized in that: A grinding machine body (1) is provided with a pushing assembly (3), a moving seat (4) is provided on the pushing assembly (3), a moving frame (5) is provided on the moving seat (4), the moving frames (5) and the moving frames (5) are connected in a sliding manner, a swing assembly (7) is provided on the moving frame (5), a mounting shell (8) is provided on the swing assembly (7), and a pressing needle (6) is provided inside the mounting shell (8).

2. A lens processing grinding machine according to claim 1, characterized in that the pressing The top of the needle (6) is a plate structure. A pressure spring (9) is provided on the lower pressing needle (6). The upper end of the pressure spring (9) is fixedly connected to the plate position of the lower pressing needle (6). The pressure spring (9) is fixedly connected to the inside of the mounting shell (8). The abutting piece (10) is slidably connected to the mounting shell (8). A symmetrical protrusion is provided on one side of the abutting piece (10) close to the lower pressing needle (6). The protrusion of the abutting piece (10) abuts the plate position of the lower pressing needle (6).

3. A lens processing grinding machine according to claim 2, characterized in that: The invention also includes a screw rod (11), which is arranged on the upper part of the mounting shell (8), the screw rod (11) and the mounting shell (8) are rotatably connected, and the screw rod (11) and the abutting member (10) are threadedly connected.

4. A lens processing grinding machine according to claim 3, characterized in that: The invention also includes a gearbox (12), which is arranged on the top of the mounting shell (8), the output shaft of the gearbox (12) and the screw (11) are fixedly connected, a worm gear (14) is arranged on the input shaft of the gearbox (12), the worm gear (14) engages with the worm (13), the worm (13) is rotatably connected to the top of the mounting shell (8), and an adjusting wheel (15) is arranged on the side of the worm (13) away from the worm gear (14).

5. A lens processing grinding machine according to claim 4, characterized in that: The utility model also comprises a cylinder (16), which is arranged on the top of the movable seat (4), and a telescopic rod of the cylinder (16) is movably connected to the movable frame (5) through an inclined slot.

6. A lens processing grinding machine according to claim 5, characterized in that: The invention also includes an insert block (17), which is symmetrically arranged and slidably connected to the bottom of the lower pressure needle (6). The insert blocks (17) are fixedly connected to a first wedge block (18) on one side close to each other. A double-sided wedge block (19) is arranged between the first wedge blocks (18). The double-sided wedge block (19) and the first wedge block (18) are squeezed together. A lifting frame (20) is fixedly connected to the top of the double-sided wedge block (19). The lifting frame (20) longitudinally penetrates the lower pressure needle (6). The lifting frame (20) and the lower pressure needle (6) are slidably connected. The upper two sides of the lifting frame (20) are squeezed together with the protrusions. Two first springs (21) are arranged on the top of the lifting frame (20). The top of the first spring (21) is fixedly connected to the plate body. The second spring (22) is connected between the outer side of the first wedge block (18) and the lower pressure needle (6).

7. A lens processing grinding machine according to claim 6, characterized in that: It also includes a pressure sensor (23), which is arranged on the top of the plate body. The pressure sensor (23) and the cylinder (16) are electrically connected through a control module, and the pressure sensor (23) and the lifting frame (20) are extrusion-fitted.

8. A lens processing grinding machine according to claim 7, characterized in that: It also includes a material receiving frame (24), which is arranged on one side of the grinding machine body (1) close to the grinding disc.

9. A lens processing grinding machine according to claim 8, characterized in that: The invention also includes a second wedge block (26), which is fixedly connected to the front lower part of the lower pressing needle (6). A third wedge block (27) is provided on the material receiving frame (24), and the third wedge block (27) and the second wedge block (26) are extruded and matched.

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