Positioning device for glass cutting

Abstract

The utility model provides a positioning device for glass cutting, which belongs to the technical field of glass processing and comprises a positioning table, and the rear end of the positioning table is fixedly connected with a fixing frame. The motor is fixedly connected to one side end of the fixing frame, and the output end of the motor is fixedly connected with a positioning groove; the number of the connecting frames is two, and the two connecting frames are fixedly connected to the top end of the positioning table; a worker only needs to slowly shift four L-shaped limiting plates to enable the four L-shaped limiting plates to be close to the two sides of the glass, after the four L-shaped limiting plates are moved, the worker only needs to use a tool to rotate bolts, the bolts can penetrate through the bolts in a threaded mode and extend into limiting grooves, and the two L-shaped limiting plates limit the two sides of the glass; therefore, the glass cutting device adapts to glass of different sizes and thicknesses, and the cutting device is stable when cutting the glass.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass processing, and in particular relates to a positioning device for glass cutting. Background Art

[0002] Glass is a material made of a variety of inorganic minerals as the main raw materials, with a small amount of auxiliary raw materials added. Glass can also be used to make water cups and glass turntables for dining tables, etc. However, during the glass making process and production, cutting is generally required. In order to avoid errors and deviations in cutting, people use positioning devices to cut the glass.

[0003] Authorization publication number "CN216687900U" records a positioning device, and particularly relates to a positioning device for glass cutting. Provided is a positioning device for glass cutting that can quickly reset a connecting rod and facilitates operation. A positioning device for glass cutting includes a loading platform, a first support frame, a U-shaped rod, a guide rod, a connecting rod, and a cutting machine, etc. Two first support frames are provided, and the two first support frames are symmetrically placed. A loading platform is connected between the tops of the two first support frames, and U-shaped rods are connected to the front and back sides of the middle of the loading platform. A guide rod is connected between the upper parts of the two U-shaped rods, and a connecting rod is slidably connected to the guide rod, and a cutting machine is connected to the lower part of the connecting rod. The utility model is provided with a splint and a rotating rod, and the splint can position the glass, which can prevent the cutting machine from offsetting when cutting the glass, thereby ensuring the cutting quality of the glass to a certain extent.

[0004] The above patent is provided with a clamp and a rotating rod. The clamp can position the glass, which can prevent the cutting machine from offsetting when cutting the glass, thereby ensuring the cutting quality of the glass to a certain extent. However, the above patent has certain disadvantages when used. It is unable to position and clamp glass of different sizes and thicknesses, making it extremely unstable when cutting glass. Utility Model Content

[0005] The utility model aims to provide a positioning device for glass cutting, aiming to solve the problem in the prior art that it is impossible to position and clamp glass of different sizes and thicknesses, making the glass cutting extremely unstable.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A positioning device for glass cutting, comprising:

[0008] A positioning table, the rear end of which is fixedly connected to a fixing frame;

[0009] A motor, wherein the motor is fixedly connected to one side end of the fixing frame, and an output end of the motor is fixedly connected to a positioning groove;

[0010] A connecting frame, wherein two connecting frames are provided, and both connecting frames are fixedly connected to the top of the positioning table;

[0011] A square limiting plate, wherein the square limiting plate is fixedly connected to the adjacent ends of the two connecting frames;

[0012] A first connecting plate, wherein two first connecting plates are provided, and the two first connecting plates are respectively fixedly connected to the front and rear ends of the positioning table;

[0013] A pressing block, two of which are provided, and both are arranged on the upper side of the positioning table; and

[0014] The positioning mechanism is arranged on the upper side of the positioning table, and the positioning mechanism is connected to the lower pressing block to position the top of the glass.

[0015] As a preferred solution of the utility model, the positioning mechanism includes:

[0016] A screw rod, the screw rod is rotatably connected to the adjacent ends of the two lower pressing blocks, the adjacent ends of the two lower pressing blocks are fixedly connected to a fixing rod, one end of the screw rod movably passes through one side end of one of the lower pressing blocks and is rotatably connected to the other end of one of the lower pressing blocks;

[0017] Nuts, two of which are provided, and both of which are threadedly connected to the circumferential surface of the screw rod;

[0018] A second inclined block, wherein two second inclined blocks are provided, the two second inclined blocks are respectively fixedly connected to the circumferential surfaces of the two nuts, and the two second inclined blocks are both slidably connected to the circumferential surface of the fixed rod;

[0019] A rack, the rack being slidably connected to the circumferential surface of the square limiting plate;

[0020] A second connecting plate, wherein the second connecting plate is fixedly connected to the bottom end of the rack, and the second connecting plate is meshed with the gear;

[0021] A first inclined block, wherein the first inclined block is fixedly connected to the bottom end of the second connecting plate, and the first inclined block is slidably connected to the outer surfaces of the two second inclined blocks;

[0022] Positioning grooves, two of which are provided, and both are opened at the top of the positioning table;

[0023] A limiting component is arranged in two positioning grooves, and the limiting component and the two positioning grooves are connected to limit two sides of the glass.

[0024] As a preferred solution of the utility model, the limit assembly includes:

[0025] A limiting groove, wherein two limiting grooves are provided, and the two limiting grooves are respectively opened on the lower inner walls of the two positioning grooves;

[0026] L-shaped limiting plates, wherein four L-shaped limiting plates are provided, and the four L-shaped limiting plates are respectively slidably connected to the lower inner walls of the two positioning grooves;

[0027] Bolts, wherein four bolts are provided, and the four bolts are respectively threadedly connected to the circumferential surfaces of the four L-shaped limiting plates, and the four bolts are respectively threadedly connected to the lower inner walls of the two limiting grooves;

[0028] The elastic component is provided with two groups, and the two groups of the elastic components are respectively arranged on the upper sides of the two first connecting plates.

[0029] As a preferred solution of the utility model, one group of elastic components includes:

[0030] Limit springs, wherein two limit springs are provided, one end of each of the limit springs is fixedly connected to the top end of one of the first connecting plates, the other end of each of the limit springs is fixedly connected to the bottom end of one of the lower pressing blocks, and two limit holes are provided at the top ends of the two first connecting plates;

[0031] The limiting rods are provided with two limiting rods, and the two limiting rods are fixedly connected to the bottom end of one of the lower pressing blocks, and the four limiting rods are slidably connected to the four sliding holes respectively.

[0032] As a preferred solution of the utility model, the two ends of the two connecting frames that are close to each other are fixedly connected to two lighting lamps, and the ends of the two connecting frames that are far away from each other are fixedly connected to a first plastic ring.

[0033] As a preferred solution of the utility model, one side end of the lower pressing block is provided with a connecting groove, and one side end of the rotating knob is provided with a threaded hole, a screw is threadedly connected in the threaded hole, and the screw is threadedly connected in the connecting groove.

[0034] Compared with the prior art, the beneficial effects of the utility model are:

[0035] 1. In this scheme, when personnel use the device, they use the PLC controller to start the motor. When the motor starts, the output shaft of the motor will drive the gear to rotate. When the gear rotates, it will drive the rack to slide on the outer surface of the square limit plate. When the rack moves, it will drive the second connecting plate. When the second connecting plate moves, it will drive the first inclined block to move again. Then the first inclined block will squeeze the second inclined block on the bottom surface. At the same time, the first inclined block will slide on the surface of the second inclined block. At this time, the second inclined block is squeezed by the first inclined block. The second inclined block will move downward through the limit spring. At this time, the limit spring will shrink, and then the limit spring shrinks when it descends. The buffer lower pressure block descends at a speed that allows the second inclined block to slowly stick to the upper part of the glass as it descends. The specific sticking position of the second inclined block is selected based on the needs of personnel to steadily position the upper part of the glass. After positioning, personnel only need to slowly move the four L-shaped limit plates to bring the four L-shaped limit plates close to both sides of the glass. After the four L-shaped limit plates are moved, personnel only need to use tools to rotate the bolts, which will thread through the bolts and extend into the limit grooves, so that the two L-shaped limit plates can limit both sides of the glass to adapt to glass of different sizes and thicknesses, allowing the cutting equipment to be stable when cutting glass.

[0036] 2. In this solution, when the two lower pressing blocks follow the two second inclined blocks to descend, the two lower pressing blocks will respectively squeeze the four limit rods and two limit springs fixed at the bottom. When the four limit springs are squeezed, the four limit springs themselves will shrink to buffer the pressure on the upper lower pressing blocks, and the four limit rods will limit the four limit springs to prevent the four limit springs from deformation.

[0037] 3. In this solution, four lighting lamps are fixed to the adjacent ends of the two connecting frames by means of a detachable connection. The four lighting lamps are used to illuminate the space between the adjacent ends. The two first plastic rings are fixed to the distant ends of the connecting frames by means of bonding. The two first plastic rings will protect the distant ends of the two connecting frames and reduce unnecessary wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0039] Figure 1 It is a three-dimensional diagram of the utility model;

[0040] Figure 2 This is a cutaway stereogram of the utility model from a first viewing angle;

[0041] Figure 3 For the utility model Figure 2 A local enlarged view of point A;

[0042] Figure 4 For the utility model Figure 2 A partial enlarged view of point B.

[0043] In the figure: 1. positioning table; 2. first connecting plate; 201. limiting rod; 202. limiting spring; 3. first plastic pad; 4. connecting frame; 5. first plastic ring; 6. lighting lamp; 7. measuring sticker; 8. positioning slot; 801. limiting slot; 802. L-shaped limiting plate; 803. bolt; 9. rack; 10. gear; 11. second connecting plate; 12. first inclined block; 13. second inclined block; 14. screw rod; 15. fixing frame; 16. motor; 17. square limiting plate; 18. pressing block; 19. turning knob; 20. connecting slot; 21. screw; 22. nut. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] Example 1

[0046] See also Figure 1 - Figure 4 , the utility model provides the following technical solutions:

[0047] A positioning device for glass cutting, comprising:

[0048] A positioning table 1, the rear end of which is fixedly connected with a fixing frame 15;

[0049] The motor 16 is fixedly connected to one side of the fixing frame 15, and the output end of the motor 16 is fixedly connected to the positioning groove 8;

[0050] A connecting frame 4, wherein two connecting frames 4 are provided, and both connecting frames 4 are fixedly connected to the top of the positioning table 1;

[0051] A square limiting plate 17, which is fixedly connected to the adjacent ends of the two connecting frames 4;

[0052] A first connecting plate 2, wherein two first connecting plates 2 are provided, and the two first connecting plates 2 are respectively fixedly connected to the front and rear ends of the positioning table 1;

[0053] A pressing block 18, wherein two pressing blocks 18 are provided, and both pressing blocks 18 are provided on the upper side of the positioning table 1; and

[0054] The positioning mechanism is arranged on the upper side of the positioning table 1 , and is connected to the lower pressing block 18 to position the top of the glass.

[0055] In a specific embodiment of the present utility model, the fixing frame 15 is fixed to the rear end of the positioning table 1 by welding, and the two connecting frames 4 are fixed to the top of the positioning table 1 by welding, so as to increase the height of the square limit plate 17 itself. The motor 16 is fixed to one side end of the fixing frame 15 by a detachable connection, and the output shaft of the motor 16 is connected to one side end of the fixing frame 15. When the motor 16 is started, the output shaft of the motor 16 will drive the positioning groove 8 to rotate, and then when the positioning groove 8 rotates, it will drive the rack 9 on the outer surface to move, and when the rack 9 moves, it will drive the gear 10 fixed at the bottom to move at the same time, and then the gear 10 will simultaneously drive the second connecting plate 11 fixed at the bottom to move again with the first bevel block 12, and the first bevel block 12 and the second bevel block 13 match each other. When the rack 9 moves to one side of one of the connecting frames 4, the gear 10 will stay at the lowest position. On the upper side of the end rack 9, two positioning grooves 8 are square-shaped and opened at the top of the positioning table 1. Four L-shaped limit plates 802 match the two positioning grooves 8. The four L-shaped limit plates 802 themselves have threaded holes. The four L-shaped limit plates 802 match the four bolts 803. The position of cutting glass is selected according to the needs of personnel. The first plastic pad 3 is fixed to the top of the positioning table 1 by bonding. The first plastic pad 3 is used to protect the glass on the upper side. The measuring sticker 7 is fixed to the top of the first plastic pad 3 by bonding. The measuring sticker 7 is used to measure the width of the glass. The motor 16 is electrically connected to the external power supply. It needs to be explained that the specific type of motor 16 and lighting lamp 6 to be used is selected by relevant technical personnel familiar with this field, and the above-mentioned motor 16 and lighting lamp 6 are all prior art, which will not be repeated in this scheme.

[0056] For details, please refer to Figure 1 - Figure 4 , the positioning mechanism includes:

[0057] The screw rod 14 is rotatably connected to the adjacent ends of the two pressing blocks 18. The adjacent ends of the two pressing blocks 18 are fixedly connected with a fixing rod. One end of the screw rod 14 movably passes through one side end of one of the pressing blocks 18 and is rotatably connected to the other end of one of the pressing blocks 18.

[0058] Nut 22, two nuts 22 are provided, and both nuts 22 are threadedly connected to the circumferential surface of the screw rod 14;

[0059] A second inclined block 13, wherein two second inclined blocks 13 are provided, and the two second inclined blocks 13 are respectively fixedly connected to the circumferential surfaces of the two nuts 22, and the two second inclined blocks 13 are both slidably connected to the circumferential surface of the fixed rod;

[0060] The rack 9 is slidably connected to the circumferential surface of the square limiting plate 17;

[0061] A second connecting plate 11, the second connecting plate 11 is fixedly connected to the bottom end of the rack 9, and the second connecting plate 11 is meshed with the gear 10;

[0062] A first inclined block 12, the first inclined block 12 is fixedly connected to the bottom end of the second connecting plate 11, and the first inclined block 12 is slidably connected to the outer surfaces of the two second inclined blocks 13;

[0063] Positioning grooves 8, two positioning grooves 8 are provided, and both positioning grooves 8 are opened at the top of the positioning table 1;

[0064] The limiting assembly is arranged in the two positioning grooves 8, and the limiting assembly and the two positioning grooves 8 are connected to limit the two sides of the glass.

[0065] In this embodiment: the two second inclined blocks 13 in the positioning mechanism will clamp and position the top of the glass when they descend, so as to adapt to glasses of different thicknesses, making it more stable and not easy to loosen when cutting the glass. The second inclined blocks 13 will squeeze the four limit springs 202 at the bottom to shrink them when they descend. The second inclined blocks 13 will also drive the four limit rods 201 when they descend, so that the four limit rods 201 slide in the four sliding holes. The positioning groove 8 is square in shape and is opened at the top of the positioning table 1. The bolt 803 is used to clamp the glass on the top of the first plastic pad 3.

[0066] For details, please refer to Figure 1 - Figure 3 , the limit assembly includes;

[0067] Limiting grooves 801, two limiting grooves 801 are provided, and the two limiting grooves 801 are respectively opened on the lower inner walls of the two positioning grooves 8;

[0068] L-shaped limiting plates 802, four L-shaped limiting plates 802 are provided, and the four L-shaped limiting plates 802 are slidably connected to the lower inner walls of the two positioning grooves 8 respectively;

[0069] Bolts 803, four bolts 803 are provided, the four bolts 803 are respectively threadedly connected to the circumferential surfaces of the four L-shaped limiting plates 802, and the four bolts 803 are respectively threadedly connected to the lower inner walls of the two limiting grooves 801;

[0070] Elastic components: two groups of elastic components are provided, and the two groups of elastic components are respectively arranged on the upper sides of the two first connecting plates 2.

[0071] In this embodiment: when the two second inclined blocks 13 in the positioning mechanism position the top of the glass, the personnel only need to slowly move the four L-shaped limit plates 802 to make the four L-shaped limit plates 802 close to the two sides of the glass. After the four L-shaped limit plates 802 are moved, the personnel only need to use a tool to rotate the bolt 803, and the bolt 803 will thread through the bolt 803 and extend into the limit groove 801, so that the two L-shaped limit plates 802 can limit the two sides of the glass, making it more stable and less likely to shake when cutting the glass, causing the glass to burst.

[0072] For details, please refer to Figure 4 , wherein a set of elastic components comprises:

[0073] Limit springs 202, two limit springs 202 are provided, one end of the two limit springs 202 is fixedly connected to the top of one of the first connecting plates 2, the other end of the two limit springs 202 is fixedly connected to the bottom of one of the lower pressing blocks 18, and the tops of the two first connecting plates 2 are provided with two limit holes;

[0074] The limiting rods 201 are provided with two limiting rods 201 , and the two limiting rods 201 are fixedly connected to the bottom end of one of the pressing blocks 18 , and the four limiting rods 201 are slidably connected to the four sliding holes respectively.

[0075] In this embodiment: when the two lower pressing blocks 18 descend along with the two second inclined blocks 13, the two lower pressing blocks 18 will respectively squeeze the four limit rods 201 and the two limit springs 202 fixed at the bottom end. When the four limit springs 202 are squeezed, the four limit springs 202 themselves will shrink to buffer the pressure on the upper lower pressing blocks 18, and the four limit rods 201 will limit the four limit springs 202 to prevent the four limit springs 202 from deformation.

[0076] For details, please refer to Figure 2 The two connecting frames 4 are fixedly connected to the two illuminating lamps 6 at their close ends, and the two connecting frames 4 are fixedly connected to the first plastic ring 5 at their far ends.

[0077] In this embodiment: four lighting lamps 6 are fixed to the adjacent ends of the two connecting frames 4 in a detachable connection manner, and the four lighting lamps 6 are used to illuminate the space between the adjacent ends. Two first plastic rings 5 ​​are fixed to the distant ends of the connecting frames 4 in an adhesive manner. The two first plastic rings 5 ​​will protect the distant ends of the two connecting frames 4 and reduce unnecessary wear.

[0078] For details, please refer to Figure 3 A connecting groove 20 is formed at one side end of one of the lower pressing blocks 18 , and a threaded hole is formed at one side end of the rotating knob 19 . A screw 21 is threadedly connected in the threaded hole, and the screw 21 is threadedly connected in the connecting groove 20 .

[0079] In this embodiment: the connecting groove 20 is circularly opened at one side end of one of the lower pressing blocks 18. After the personnel rotate the rotating knob 19, the personnel aligns the screw 21 with the threaded hole opened at one side end of the rotating knob 19, and then uses a tool to rotate the screw 21 so that the screw 21 will thread through the threaded hole and extend into the connecting groove 20 to limit the rotating knob 19 and prevent the rotating knob 19 from rotating.

[0080] The working principle and use process of the utility model are as follows: when using the device, the personnel use the PLC controller to start the motor 16. When the motor 16 is started, the output shaft of the motor 16 will drive the gear 10 to rotate. When the gear 10 rotates, it will drive the rack 9 to slide on the outer surface of the square limit plate 17. When the rack 9 moves, it will drive the second connecting plate 11. When the second connecting plate 11 moves, it will drive the first inclined block 12 to move again. Then the first inclined block 12 will squeeze the second inclined block 13 on the bottom surface. At the same time, the first inclined block 12 will slide on the surface of the second inclined block 13. At this time, the second inclined block 13 is squeezed by the first inclined block 12. The second inclined block 13 will move downward through the limit spring 202. At this time, the limit spring 202 will shrink, and then the limit When the positioning spring 202 descends, it contracts to buffer the descending speed of the pressing block 18, and then the second inclined block 13 will slowly approach the upper part of the glass when it descends. The specific close position of the second inclined block 13 is selected according to the needs of the personnel to stably position the upper part of the glass. After the positioning is completed, the personnel only need to slowly move the four L-shaped limit plates 802 to make the four L-shaped limit plates 802 close to the two sides of the glass. After the four L-shaped limit plates 802 are moved, the personnel only need to use tools to rotate the bolt 803, and the bolt 803 will thread through the bolt 803 and extend into the limit groove 801, so that the two L-shaped limit plates 802 limit the two sides of the glass, so as to adapt to glass of different sizes and thicknesses, so that the cutting equipment can be stable when cutting glass.

[0081] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A positioning device for glass cutting, characterized in that: include: A positioning table (1), wherein a rear end of the positioning table (1) is fixedly connected to a fixing frame (15); A motor (16), wherein the motor (16) is fixedly connected to one side end of the fixing frame (15), and an output end of the motor (16) is fixedly connected to a positioning groove (8); A connecting frame (4), wherein two connecting frames (4) are provided, and both connecting frames (4) are fixedly connected to the top of the positioning table (1); A square limiting plate (17), wherein the square limiting plate (17) is fixedly connected to adjacent ends of the two connecting frames (4); A first connecting plate (2), wherein two first connecting plates (2) are provided, and the two first connecting plates (2) are respectively fixedly connected to the front and rear ends of the positioning table (1); A lower pressing block (18), wherein two lower pressing blocks (18) are provided, and both lower pressing blocks (18) are arranged on the upper side of the positioning table (1); as well as A positioning mechanism is provided on the upper side of the positioning table (1), and is connected to a lower pressing block (18) to position the top of the glass.

2. A positioning device for glass cutting according to claim 1, characterized in that: The positioning mechanism comprises: A screw rod (14), the screw rod (14) is rotatably connected to the adjacent ends of the two lower pressing blocks (18), the adjacent ends of the two lower pressing blocks (18) are fixedly connected to a fixing rod, one end of the screw rod (14) movably passes through one side end of one of the lower pressing blocks (18) and is rotatably connected to the other end of one of the lower pressing blocks (18); Nuts (22), two nuts (22) are provided, and both nuts (22) are threadedly connected to the circumferential surface of the screw rod (14); A second inclined block (13), wherein two second inclined blocks (13) are provided, and the two second inclined blocks (13) are respectively fixedly connected to the circumferential surfaces of the two nuts (22), and the two second inclined blocks (13) are both slidably connected to the circumferential surface of the fixed rod; A rack (9), wherein the rack (9) is slidably connected to the circumferential surface of the square limiting plate (17); A second connecting plate (11), the second connecting plate (11) is fixedly connected to the bottom end of the rack (9), and the second connecting plate (11) is meshed with the gear (10); A first inclined block (12), the first inclined block (12) being fixedly connected to the bottom end of the second connecting plate (11), and the first inclined block (12) being slidably connected to the outer surfaces of the two second inclined blocks (13); A positioning groove (8), wherein two positioning grooves (8) are provided, and both positioning grooves (8) are opened at the top of the positioning table (1); A limiting component is arranged in two positioning grooves (8); the limiting component and the two positioning grooves (8) are connected to limit two sides of the glass.

3. A positioning device for glass cutting according to claim 2, characterized in that: The limiting component comprises: A limiting groove (801), wherein two limiting grooves (801) are provided, and the two limiting grooves (801) are respectively opened on the lower inner walls of the two positioning grooves (8); L-shaped limiting plates (802), wherein four L-shaped limiting plates (802) are provided, and the four L-shaped limiting plates (802) are respectively slidably connected to the lower inner walls of the two positioning grooves (8); Bolts (803), four of which are provided, and the four bolts (803) are respectively threadedly connected to the circumferential surfaces of the four L-shaped limiting plates (802), and the four bolts (803) are respectively threadedly connected to the lower inner walls of the two limiting grooves (801); Elastic components, wherein two groups of the elastic components are provided, and the two groups of the elastic components are respectively arranged on the upper sides of the two first connecting plates (2).

4. A positioning device for glass cutting according to claim 3, characterized in that: One set of said elastic components comprises: A limit spring (202), wherein two limit springs (202) are provided, one end of each of the limit springs (202) is fixedly connected to the top end of one of the first connecting plates (2), and the other end of each of the limit springs (202) is fixedly connected to the bottom end of one of the lower pressing blocks (18), and two limit holes are provided at the top ends of the two first connecting plates (2); The limiting rods (201) are provided with two limiting rods (201), and the two limiting rods (201) are fixedly connected to the bottom end of one of the lower pressing blocks (18), and the four limiting rods (201) are slidably connected to the four sliding holes respectively.

5. A positioning device for glass cutting according to claim 4, characterized in that: The two connecting frames (4) are fixedly connected to the ends close to each other with two lighting lamps (6), and the two connecting frames (4) are fixedly connected to the ends far away from each other with a first plastic ring (5).

6. A positioning device for glass cutting according to claim 5, characterized in that: A connection groove (20) is provided at one side end of one of the lower pressing blocks (18), and a threaded hole is provided at one side end of the rotating knob (19). A screw (21) is threadedly connected in the threaded hole, and the screw (21) is threadedly connected in the connection groove (20).

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