A large-size optical glass flatness adaptive grinding device

Abstract

The present invention discloses a large-size optical glass flatness adaptive grinding device, which relates to the field of optical glass surface treatment, including a material table for carrying the optical glass, and a gantry arranged across the material table, a linear motion mechanism is rotatably arranged on the top of the gantry, the linear motion mechanism is driven to rotate by a first motor, the linear motion mechanism is connected to a lifting mechanism, the linear motion mechanism is used to drive the lifting mechanism to move horizontally, the lifting mechanism is connected to a grinding piece, and the lifting mechanism is used to drive the grinding piece to move up and down. The present invention controls two clamping arms to move together, so as to automatically center the position of the optical glass, and at the same time, the two clamping arms limit the grinding range. When the grinding piece moves to the edge of the optical glass, the micro switch touches the clamping arm to drive the grinding piece to move in the opposite direction, and the grinding piece keeps moving back and forth within the range limited by the two clamping arms, automatically adapting to the size alignment of the optical glass and performing precise and comprehensive grinding processing.

Description

Technical Field

[0001] The invention relates to the field of optical glass surface treatment, and in particular to a large-size optical glass flatness adaptive grinding device. Background Art

[0002] Optical glass is ground to maintain a high degree of precision and flatness on its surface. The grinding process of optical glass is divided into coarse grinding, fine grinding and fine grinding. The coarse grinding and fine grinding processes are achieved by rotating the grinding disc. During the grinding process, the grinding disc needs to dynamically grind around the contour of the optical glass.

[0003] Large-sized optical glass has a larger surface area, and the dynamic range of the grinding disc used to grind it is larger. Grinding errors are prone to occur for optical glasses of different sizes. Therefore, it is necessary to adjust the coefficient of the grinding disc's range of motion specifically according to the size of the optical glass, and rapid adaptive matching grinding cannot be achieved. Summary of the Invention

[0004] In order to make up for the deficiencies of the existing technical problems, the purpose of the present invention is to provide a large-size optical glass flatness adaptive grinding device to solve the problem that traditional grinding equipment lacks adaptive matching grinding technology for grinding large-size optical glass.

[0005] In order to solve the problems of the prior art, the technical solutions of the present invention are as follows:

[0006] A large-size optical glass flatness adaptive grinding device includes a material table for carrying optical glass and a gantry arranged across the material table. A linear motion mechanism is rotatably arranged on the top of the gantry. The linear motion mechanism is driven to rotate by a first motor. The linear motion mechanism is connected to a lifting mechanism. The linear motion mechanism is used to drive the lifting mechanism to move laterally. The lifting mechanism is connected to a grinding piece. The lifting mechanism is used to drive the grinding piece to move up and down. The linear motion mechanism is symmetrically connected to two clamping arms. The linear motion mechanism can drive the two clamping arms to open and close, so that the clamping arms touch the edge of the optical glass and center it on the surface of the material table. Side plates are symmetrically fixed on both sides of the lifting mechanism. Micro switches are installed on the surface of the side plates. The micro switches are connected to the linear motion mechanism through a controller. When the grinding piece moves to the edge of the optical glass, the micro switch is touched by the clamping arm, causing the linear motion mechanism to push the grinding piece in the opposite direction.

[0007] Preferably, the linear motion mechanism includes a suspension, two first guide rods and a horizontal screw are distributed parallel to the suspension surface, one end of the horizontal screw is connected to a third motor, the lifting mechanism is slidingly connected to the first guide rod and threadedly connected to the horizontal screw, and the third motor is connected to the micro switch through a controller.

[0008] Preferably, the linear motion mechanism also includes a second guide rod and a bidirectional screw distributed in parallel. The second guide rod has two suspension blocks that slide linearly. The two clamping arms are respectively connected to the suspension blocks. The bidirectional screw is reversely threaded to connect the two suspension blocks. One end of the bidirectional screw is connected to a fourth motor for driving the two clamping arms to open and close.

[0009] Preferably, the lifting mechanism includes a vertical plate, which connects the first guide rod and the horizontal screw. The surface of the vertical plate has a vertically extending slide groove, a slider is slidably arranged in the slide groove, the slider is connected to a carrier, the grinding part is connected to the carrier, a vertical screw is rotatably arranged in the slide groove, the vertical screw is threadedly connected to the slider, and one end of the vertical screw is connected to the fifth motor.

[0010] Preferably, a embedding groove is provided through the surface of the carrier, and a clamping block is inserted through the embedding groove from one side of the carrier. The clamping block is fixed flatly to the slider by bolts, and a first pressure sensor is provided between the clamping block and the bottom of the embedding groove. The first pressure sensor is connected to the fifth motor through a controller.

[0011] Preferably, the grinding part includes a back plate, a grinding ring is provided at the bottom of the back plate, three guide pillars are evenly fixed on the upper surface of the back plate, a hanging plate is provided above the back plate, the hanging plate has three evenly distributed through holes, the diameter of the through holes is larger than the diameter of the guide pillars, the guide pillars are aligned and passed through the through holes and then threadedly connected to the nuts, a spring is provided on the outside of the guide pillars, the hanging plate and the back plate compress the spring, and there is a shaft at the center of the hanging plate, which is connected to the second motor.

[0012] Preferably, a universal ball joint is provided between the hanging plate and the back plate, and the universal ball joint has two shaft columns, and the two shaft columns of the universal ball joint are respectively plugged into the center positions of the hanging plate and the back plate.

[0013] Preferably, an angle seat is provided at the bottom of the clamping arm, and two rollers rotate symmetrically on the surface of the angle seat. The rollers are used to contact the edge of the optical glass. Two studs are fixed on the angle seat, and the studs pass through the clamping arm and are locked by nuts. A second pressure sensor is provided between the angle seat and the clamping arm, and the second pressure sensor is connected to the fourth motor through the controller.

[0014] Preferably, the outer side of the roller is covered with a rubber layer.

[0015] Preferably, two slide columns are fixed on the surface of the clamp arm, and the slide columns are slidably guided to set a touch plate, which is used to align and contact the micro switch. A screw is rotatably set on the surface of the clamp arm, and the screw is threadedly connected to the touch plate.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] 1. The present invention controls the two clamping arms to move closer together to automatically center the position of the optical glass. At the same time, the two clamping arms limit the grinding range. When the grinding piece moves to the edge of the optical glass, the micro switch touches the clamping arm to drive the grinding piece to move in the opposite direction. The grinding piece keeps moving back and forth within the range limited by the two clamping arms, automatically adapting to the size of the optical glass for precise and comprehensive grinding processing.

[0018] 2. The present invention uses three sets of springs and a universal ball shaft to connect the back plate and the hanging plate, so that the grinding ring can elastically rotate to adapt to the curve of the optical glass and realize self-adaptive flat grinding processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic structural diagram of the clamping arm connection linear motion mechanism of the present invention.

[0021] Figure 3 It is a schematic structural diagram of the linear motion mechanism of the present invention.

[0022] Figure 4 It is a schematic structural diagram of the lifting mechanism of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the carrier connected to the slider of the present invention.

[0024] Figure 6 It is a schematic diagram of the grinding piece structure of the present invention.

[0025] Figure 7 This is a schematic diagram of the grinding piece of the present invention aligning the edge of optical glass.

[0026] Figure 8 for Figure 7 Enlarged view of point A.

[0027] Figure 9 This is a schematic diagram of the angle seat connecting the clamping arms of the present invention.

[0028] Figure 1: Material table; 2: Gantry; 3: Linear motion mechanism; 31: Suspension; 32: First guide rod; 33: Horizontal lead screw; 34: Third motor; 35: Suspension block; 36: Second guide rod; 37: Bidirectional screw; 38: Fourth motor; 4: Lifting mechanism; 41: Vertical plate; 42: Slide; 43: Slider; 44: Vertical lead screw; 45: Fifth motor; 46: Carrier; 47: Groove; 48: Block ;49. First pressure sensor; 5. First motor; 6. Clamping arm; 61. Angle seat; 62. Roller; 63. Stud; 64. Second pressure sensor; 7. Second motor; 8. Grinding part; 81. Back plate; 82. Grinding ring; 83. Hanging plate; 84. Guide column; 85. Universal ball joint; 86. Through hole; 87. Shaft; 9. Side panel; 91. Micro switch; 92. Touch panel; 93. Sliding column; 94. Screw. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] like Figure 1 As shown, the large-size optical glass flatness adaptive grinding device has a material table 1, which is used to carry large-size optical glass. A negative pressure adsorption tooling (which belongs to conventional technology and is not shown in the figure) can be set inside the material table 1 to adsorb and position the optical glass. This adsorption action is performed after the optical glass is centered.

[0031] like Figure 1 、 Figure 2 As shown, a gantry 2 is arranged across the material table 1, and a linear motion mechanism 3 is arranged directly above the material table 1. The linear motion mechanism 3 is distributed corresponding to the diameter direction of the material table 1. The linear motion mechanism 3 includes a suspension 31. The suspension 31 is a flat plate with both ends bent and drooped. The center position of the suspension 31 is rotatably connected to the gantry 2 through a rotating shaft. The first motor 5 is installed on the surface of the gantry 2. The output shaft of the first motor 5 is connected to the rotating shaft of the suspension 31 through a reduction gear set, so that the first motor 5 can drive the suspension 31 to rotate slowly.

[0032] like Figure 3 As shown, two sets of thread transmission components are provided below the suspension 31. The upper thread transmission component comprises two parallel first guide rods 32 and a horizontal lead screw 33. The ends of the first guide rods 32 are fixed perpendicularly to the ends of the suspension 31. The ends of the horizontal lead screw 33 rotate perpendicularly to the ends of the suspension 31. A third motor 34 is mounted at one end of the suspension 31, and the output shaft of the third motor 34 is fixedly connected to the end of the horizontal lead screw 33.

[0033] like Figure 2As shown, the lower threaded conduction component is composed of two parallel second guide rods 36 and a bidirectional screw 37. The two ends of the second guide rod 36 are fixed perpendicularly to the two ends of the suspension 31, and the two ends of the bidirectional screw 37 rotate perpendicularly to the two ends of the suspension 31. The fourth motor 38 is installed at the other end of the suspension 31, and the output shaft of the fourth motor 38 is connected to one end of the bidirectional screw 37.

[0034] like Figure 4 As shown, the lifting mechanism 4 includes a vertical plate 41, which is L-shaped. The top of the vertical plate 41 is slidingly connected to the first guide rod 32, and the horizontal screw 33 is threadedly connected to the vertical plate 41. The surface of the vertical plate 41 has a vertically extending slide groove 42, and a slider 43 is slidingly set in the slide groove 42. The side of the slider 43 is connected to the carrier 46. The vertical screw 44 is rotatably set in the slide groove 42, and the vertical screw 44 is threaded through the slider 43. The fifth motor 45 is installed on the top of the vertical plate 41, and the output shaft of the fifth motor 45 is connected to the vertical screw 44.

[0035] like Figure 4 As shown, the second motor 7 is installed on the surface of the carrier 46, and the grinding piece 8 is rotatably arranged at the bottom of the carrier 46. The output shaft of the second motor 7 is connected to the shaft of the grinding piece 8, so that the second motor 7 can drive the grinding piece 8 to rotate quickly.

[0036] like Figure 2 、 Figure 7 、 Figure 8 As shown, two suspension blocks 35 are symmetrically slidably set on the surface of the second guide rod 36, and the bidirectional screw 37 is reversely threaded to connect the two suspension blocks 35. The bottom of the suspension block 35 is fixedly connected to the clamping arm 6, and the clamping arm 6 extends vertically downward to the surface of the material table 1. Two side panels 9 are symmetrically fixedly installed on both sides of the vertical plate 41, and a micro switch 91 is installed on the surface of the side panel 9. The touch part of the micro switch 91 is aligned with the clamping arm 6, and the micro switch 91 is connected to the third motor 34 through the controller.

[0037] The principle of adaptive grinding of optical glass is as follows:

[0038] In the initial state, the two clamping arms 6 are in the maximum open state. A large optical glass is placed on the surface of the material table 1. The bottom end of the clamping arm 6 is lower than the edge of the optical glass. The fourth motor 38 is turned on to drive the bidirectional screw 37 to rotate. The bidirectional screw 37 pushes the two suspension blocks 35 closer together, so that the two clamping arms 6 push the optical glass to the center. At the same time, the two clamping arms 6 automatically limit the grinding range.

[0039] The second motor 7 is turned on to drive the grinding member 8 to rotate, and the fifth motor 45 is turned on to drive the vertical screw 44 to rotate. The vertical screw 44 drives the slider 43 to drive the carrier 46 to descend, so that the rotating grinding member 8 presses down to contact the surface of the optical glass for grinding;

[0040] The third motor 34 is turned on to drive the horizontal screw 33 to rotate. The horizontal screw 33 pushes the lifting mechanism 4 to move along the first guide rod 32, so that the grinding member 8 moves along the diameter direction of the optical glass to grind. When the grinding member 8 moves to the edge of the optical glass, the micro switch 91 is touched by the clamping arm 6 on that side, and the controller controls the third motor 34 to reverse, pushing the lifting mechanism 4 to drive the grinding member 8 to move to the other side of the optical glass. Similarly, the grinding member 8 can reciprocate and grind the entire diameter range of the optical glass.

[0041] The first motor 5 is turned on to drive the linear motion mechanism 3 to rotate slowly. While the grinding piece 8 grinds the optical glass back and forth along the diameter direction, the rotating linear motion mechanism 3 adjusts the angle so that the grinding piece 8 can fully grind the entire surface of the optical glass.

[0042] like Figure 5 As shown, a mounting groove 47 is formed through the surface of the carrier 46, and a clamping block 48 has a T-shaped cross section. The clamping block 48 is inserted from one side of the carrier 46 through the mounting groove 47 and the slider 43. The clamping block 48 and the slider 43 are fixed together with bolts. A first pressure sensor 49 is provided between the clamping block 48 and the bottom of the mounting groove 47 to connect the carrier 46 and the slider 43. The first pressure sensor 49 is connected to the fifth motor 45 through a controller.

[0043] The vertical screw 44 drives the slider 43 to drive the carrier 46 and the grinding piece 8 to descend. The grinding piece 8 contacts the surface of the optical glass and presses down the first pressure sensor 49 through the bottom of the block 48, applying downward pressure to the carrier 46. The reaction force of the grinding piece 8 pressing down the optical glass is fed back to the first pressure sensor 49. The pressure applied by the grinding piece 8 to grind the optical glass is detected by the first pressure sensor 49, and the pressure information is fed back to the controller. The controller controls the fifth motor 45 to work and controls the grinding piece 8 to maintain the set grinding pressure.

[0044] like Figure 6 As shown, the grinding member 8 includes a disc-shaped back plate 81, a grinding ring 82 is fixed to the bottom of the back plate 81, and three guide pillars 84 are evenly fixed on the upper surface of the back plate 81. The upper part of the guide pillar 84 has an external thread. The hanging plate 83 is arranged above the back plate 81, and three through holes 86 are evenly opened on the surface of the hanging plate 83. The diameter of the through hole 86 is larger than the diameter of the guide pillar 84. A spring is sleeved on the outside of each guide pillar 84, and then the guide pillars 84 are aligned and passed through the through holes 86 one by one. Then, the guide pillars 84 are threadedly connected with nuts to press down the hanging plate 83, so that the hanging plate 83 and the back plate 81 compress the spring. The center position of the hanging plate 83 has a shaft 87, and the shaft 87 is connected to the output shaft of the second motor 7;

[0045] The second motor 7 drives the shaft 87 and the hanging plate 83 to rotate, and the back plate 81 rotates synchronously through the limit of the guide column 84 and the through hole 86. The back plate 81 is connected to the hanging plate 83 by the uniform elastic pressure of three groups of springs. Under normal circumstances, the back plate 81 remains in a horizontal state. When there is a curvature on the surface of the optical glass, the deformation of the three groups of springs causes the angle of the back plate 81 to deflect, and the grinding ring 82 can be flat against the optical glass. The grinding angle can be adaptively adjusted according to the surface state of the optical glass.

[0046] A universal ball joint 85 is arranged between the hanging plate 83 and the back plate 81. The universal ball joint 85 has two shaft columns. The two shaft columns of the universal ball joint 85 are respectively inserted into the center positions of the hanging plate 83 and the back plate 81. Through the setting of the universal ball joint 85, the center positions of the hanging plate 83 and the back plate 81 are positioned, which satisfies the angular deflection of the back plate 81 while avoiding position displacement of the back plate 81 relative to the hanging plate 83.

[0047] like Figure 9 As shown, an angle seat 61 is provided at the bottom of the clamping arm 6, and two rollers 62 are symmetrically rotated on the surface of the angle seat 61. The rollers 62 are used to abut the edge of the optical glass. A total of four rollers 62 can accurately locate the position of the optical glass, and the clamping arm 6 can ensure stable rotation around the optical glass by abutting the edge of the optical glass through the rollers 62. The outer side of the roller 62 is coated with a rubber layer to achieve soft protection for the edge of the optical glass. Two studs 63 are fixed on the surface of the angle seat 61. The studs 63 pass through the clamping arm 6 and are locked by nuts. A second pressure sensor 64 is provided between the angle seat 61 and the clamping arm 6. The second pressure sensor 64 is connected to the fourth motor 38 through the controller.

[0048] The bidirectional screw 37 is driven by the fourth motor 38 to move the two clamping arms 6 closer together, so that the roller 62 contacts the edge of the optical glass to center it. The second pressure sensor 64 is used to detect the pressure applied by the roller 62 to the edge of the optical glass. When the optical glass reaches the center position, the pressure applied by the roller 62 gradually increases. The pressure value is fed back to the controller through the second pressure sensor 64, and the controller can promptly control the fourth motor 38 to suspend work to prevent the roller 62 from excessively clamping the optical glass.

[0049] like Figure 7 、 Figure 8 As shown, two sliding posts 93 are fixed on the surface of the clamping arm 6, the touch plate 92 is slidably plugged into the sliding post 93, the screw 94 is rotatably connected to the clamping arm 6, and the end of the screw 94 is threadedly connected to the touch plate 92. The touch plate 92 is used to align the contact micro switch 91. The distance between the touch plate 92 and the clamping arm 6 is adjusted by rotating the screw 94 to fine-tune the timing of the micro switch 91 being touched to ensure that the micro switch 91 is touched by the touch plate 92 only when the grinding piece 8 fully covers the edge of the optical glass.

[0050] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A large-size optical glass flatness adaptive grinding device, comprising: A material table (1) for carrying optical glass, and a gantry (2) arranged across the material table (1), a linear motion mechanism (3) is arranged on the top of the gantry (2), the linear motion mechanism (3) is driven to rotate by a first motor (5), the linear motion mechanism (3) is connected to a lifting mechanism (4), the linear motion mechanism (3) is used to drive the lifting mechanism (4) to move horizontally, the lifting mechanism (4) is connected to a grinding piece (8), the lifting mechanism (4) is used to drive the grinding piece (8) to move up and down, and is characterized in that the linear motion mechanism (3) is symmetrically connected to Two clamping arms (6), a linear motion mechanism (3) can drive the two clamping arms (6) to open and close, so that the clamping arms (6) touch the edge of the optical glass and are centered on the surface of the material table (1), and the lifting mechanism (4) has symmetrical fixed side plates (9) on both sides, and a micro switch (91) is installed on the surface of the side plate (9). The micro switch (91) is connected to the linear motion mechanism (3) through a controller. When the grinding piece (8) moves to the edge of the optical glass, the micro switch (91) is touched by the clamping arm (6), so that the linear motion mechanism (3) pushes the grinding piece (8) in the opposite direction to move.

2. The large-size optical glass flatness adaptive grinding device according to claim 1 is characterized in that: The linear motion mechanism (3) includes a suspension (31), two first guide rods (32) and a horizontal lead screw (33) are distributed in parallel on the surface of the suspension (31), one end of the horizontal lead screw (33) is connected to a third motor (34), the lifting mechanism (4) is slidably connected to the first guide rod (32) and is threadedly connected to the horizontal lead screw (33), and the third motor (34) is connected to the micro switch (91) through a controller.

3. The large-size optical glass flatness adaptive grinding device according to claim 2, characterized in that: The linear motion mechanism (3) further comprises a second guide rod (36) and a bidirectional screw (37) distributed in parallel, the second guide rod (36) linearly slidingly having two suspension blocks (35), the two clamping arms (6) being respectively connected to the suspension blocks (35), the bidirectional screw (37) being threadedly connected to the two suspension blocks (35) in opposite directions, and one end of the bidirectional screw (37) being connected to a fourth motor (38) for driving the two clamping arms (6) to open and close.

4. The large-size optical glass flatness adaptive grinding device according to claim 2, characterized in that: The lifting mechanism (4) includes a vertical plate (41), the vertical plate (41) is connected to the first guide rod (32) and the horizontal screw (33), the surface of the vertical plate (41) has a vertically extending slide groove (42), a slider (43) is slidably arranged in the slide groove (42), the slider (43) is connected to a carrier (46), the grinding member (8) is connected to the carrier (46), a vertical screw (44) is rotatably arranged in the slide groove (42), the vertical screw (44) is threadedly connected to the slider (43), and one end of the vertical screw (44) is connected to a fifth motor (45).

5. The large-size optical glass flatness adaptive grinding device according to claim 4, characterized in that: The surface of the carrier (46) is provided with an embedding groove (47), and a clamping block (48) is inserted through the embedding groove (47) on one side of the carrier (46). The clamping block (48) is fixed flatly to the slider (43) by bolts. A first pressure sensor (49) is provided between the clamping block (48) and the bottom of the embedding groove (47). The first pressure sensor (49) is connected to the fifth motor (45) through a controller.

6. The large-size optical glass flatness adaptive grinding device according to claim 1, characterized in that: The grinding member (8) includes a back plate (81), a grinding ring (82) is provided at the bottom of the back plate (81), three guide posts (84) are evenly fixed on the upper surface of the back plate (81), a hanging plate (83) is provided above the back plate (81), the hanging plate (83) has three evenly distributed through holes (86), the diameter of the through holes (86) is larger than the diameter of the guide posts (84), the guide posts (84) are aligned and penetrate the through holes (86) and then are threadedly connected to nuts, a spring is provided on the outside of the guide posts (84), the hanging plate (83) and the back plate (81) compress the spring, a shaft (87) is provided at the center of the hanging plate (83), and the shaft (87) is connected to the second motor (7).

7. The large-size optical glass flatness adaptive grinding device according to claim 6, characterized in that: A universal ball joint (85) is provided between the hanging plate (83) and the back plate (81). The universal ball joint (85) has two shaft columns. The two shaft columns of the universal ball joint (85) are respectively plugged into the center positions of the hanging plate (83) and the back plate (81).

8. The large-size optical glass flatness adaptive grinding device according to claim 3, characterized in that: The bottom of the clamping arm (6) is provided with an angle seat (61), and two rollers (62) are symmetrically rotated on the surface of the angle seat (61), and the rollers (62) are used to abut against the edge of the optical glass. The angle seat (61) is fixed with two studs (63), and the studs (63) pass through the clamping arm (6) and are locked by nuts. A second pressure sensor (64) is provided between the angle seat (61) and the clamping arm (6), and the second pressure sensor (64) is connected to the fourth motor (38) through a controller.

9. The large-size optical glass flatness adaptive grinding device according to claim 8, characterized in that: The outer side of the roller (62) is covered with a rubber layer.

10. The large-size optical glass flatness adaptive grinding device according to claim 1, characterized in that: Two slide posts (93) are fixed on the surface of the clamping arm (6), and the slide posts (93) are slidably guided to set a touch plate (92), and the touch plate (92) is used to align and contact the micro switch (91). A screw (94) is rotatably set on the surface of the clamping arm (6), and the screw (94) is threadedly connected to the touch plate (92).

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