A low-heat-affected laser cutting device for mobile phone display substrates

Abstract

The invention discloses a mobile phone display screen substrate laser cutting device with low thermal impact, and specifically relates to the technical field of display screen processing. The invention provides a gas introduction component and a cooling unit. After nitrogen is filled, low-temperature nitrogen flows from the surrounding area to the cutting area, absorbs heat and becomes high-temperature nitrogen. The high-temperature nitrogen rises and flows to the surrounding area, and flows back to the cutting area after being cooled again. Nitrogen forms convection around the cutting area, and the heat is continuously taken away from the cutting area by the convection nitrogen, so as to achieve the effect of rapid cooling. The top surface of the display screen substrate is firstly cooled and cooled in a rolling manner before laser cutting, so as to reduce the temperature of the display screen substrate, reduce the risk of thermal deformation and thermal damage, increase thermal stability, and thus improve processing accuracy. The remaining two cooling rollers alternately reach the bottom position, contact the cooling roller after heat conduction through the heat absorption roller, guide the heat dissipation, facilitate alternating use, and improve heat dissipation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of display screen processing, and in particular to a mobile phone display screen substrate laser cutting device with low thermal impact. Background Art

[0002] Laser cutting of display substrates is a high-precision and high-efficiency processing technology that is widely used in the manufacturing process of display devices such as mobile phones, computers, and LCD screens. In this process, the laser moving heat source heats the material, and the transient heat conduction and temperature field gradient changes generate thermal stress. The thermal stress is used to induce cracks to expand until they break, thereby dividing the display substrate. The laser cutting section is smooth and formed in one step, which has little effect on the properties and morphology of the raw materials.

[0003] After searching, the invention patent with publication number CN116021179A discloses a laser cutting device for backlight aluminum substrate, which avoids the corrosion of supporting components by laser cutting. The operator moves the movable plate by the handle, and the pressure plate can limit the backlight aluminum substrate through the connection of the gear and the tooth plate.

[0004] In the existing solution, the substrate is directly cut by laser. The laser beam is irradiated on the surface of the display screen substrate to generate heat. Under high temperature, thermal expansion occurs inside the substrate and thermal stress is generated, resulting in dimensional changes, deformation, cracking and other problems of the display screen substrate. At the same time, the cut part of the substrate is easily exposed to oxygen, causing oxidation reaction, and the cutting quality cannot be guaranteed. Summary of the invention

[0005] The purpose of the present invention is to provide a mobile phone display screen substrate laser cutting device with low thermal impact to solve the problems mentioned in the above background technology.

[0006] The technical problems mainly solved by the present invention are:

[0007] Existing laser cutting generates high temperature heat, which causes dimensional changes, deformation and cracking of the display substrate, making it impossible to guarantee the cutting quality.

[0008] The present invention can be achieved through the following technical solutions:

[0009] A low-heat-affected mobile phone display screen substrate laser cutting device comprises a cutting chamber, the cutting chamber comprises a processing seat, the top end of the processing seat is fittedly connected with a closed seat driven to rise and fall by a hydraulic cylinder, a directional feeding assembly is installed on the outer side of the cutting chamber, a U-shaped storage plate is fixedly arranged on the inner wall surface of the processing seat, a contact portion for bearing and supporting a strip-shaped mobile phone display screen substrate is arranged inwardly on the upper surface of the storage plate, and a gas introduction assembly for continuously cooling the bottom surface of the strip-shaped mobile phone display screen substrate is installed in the storage plate;

[0010] The hydraulic cylinder is fixed on the bracket above the closed seat, and a laser cutting assembly for horizontally cutting the strip-shaped mobile phone display screen substrate is slidably arranged on the bottom surface of the inner cavity of the closed seat, and the laser cutting assembly includes a transmission seat with a convex structure, and a track plate for horizontal movement is slidably arranged on the bottom surface of the transmission seat, and an infrared detection module, a laser head and a cooling unit are arranged on the bottom surface of the track plate in sequence, and the infrared detection module is an infrared detector, and a protective mechanism is arranged at the end of the bottom surface of the transmission seat;

[0011] The cooling unit includes at least one electric push rod 1, which is installed on a track plate, and a pushing end of the electric push rod 1 is fixedly connected to a sleeve, the inside of the sleeve is rotatably connected to a rotating disk, and three cooling rollers are rotatably arranged on the inner side of the rotating disk, and the bottom cooling roller is in rolling contact with the cut portion of the upper surface of the strip-shaped mobile phone display screen substrate, and heat-absorbing rollers are fixedly arranged on both sides of the pushing end of the electric push rod 1, and the heat-absorbing rollers are in close contact with the remaining two cooling rollers.

[0012] A further technical improvement of the present invention is that at least one longitudinal guide rail is installed on the top surface of the inner cavity of the closing seat, a sliding frame is slidably arranged outside the longitudinal guide rail, a driving screw is rotatably installed at the bottom of the sliding frame, and the driving screw is threadedly connected to the driving seat.

[0013] A further technical improvement of the present invention is that the gas introduction component includes a cooling element that is lifted and lowered in the storage plate, the surface of the cooling element is provided with at least one through groove, both sides of the through groove are provided with flow cavities for cooling, the flow cavities located on both sides of the through groove are connected, a charging pipe for charging nitrogen is installed on one side of the cooling element, and a discharge pipe is provided on the other side of the cooling element, and the charging pipe and the discharge pipe are both connected to the two flow cavities.

[0014] A further technical improvement of the present invention is that a lifting assembly is arranged at the top of the inner cavity of the storage plate, the lifting assembly includes an electromagnet, the armature in the electromagnet is connected to a T-shaped rod, the end of the T-shaped rod is connected to a docking part, and the docking part is fixed to the outer wall of the cooling part.

[0015] A further technical improvement of the present invention is that: the bottom surface of the storage plate is penetrated by an ash drop opening communicated with the through groove, and the bottom surface of the storage plate is provided with a chip collection box movable on the bottom surface of the inner cavity of the processing seat.

[0016] A further technical improvement of the present invention lies in that at least one group of clamping components for clamping the longitudinal surface of the strip-shaped mobile phone display screen substrate is provided on the inner side of the contact portion, the clamping components include two clamping plates, and the inner wall surface of each clamping plate is elastically mounted with a reset pressure block for limiting the top surface of the strip-shaped mobile phone display screen substrate, and the inner wall surface of the processing seat is mounted with at least one group of limiting cylinders, which are fixed to the corresponding clamping plates.

[0017] A further technical improvement of the present invention is that the protective mechanism includes a fixed part, the bottom end of the fixed part is connected to a foldable and telescopic part, the end of the foldable and telescopic part is connected to a pressing part, the pressing part is in contact with the cooling part, the outer sides of the pressing part and the fixed part are both installed with mounting parts, a thrust cylinder is installed on the surface of the upper mounting part, and the pushing end of the thrust cylinder is fixed to the lower mounting part.

[0018] A further technical improvement of the present invention is that the directional feeding assembly includes supporting cross bars arranged on both sides of the processing seat, the height of the supporting cross bars is higher than the height of the processing seat, and a transverse guide rail is installed on the bottom surface of the supporting cross bars, a conveyor belt is arranged below the supporting cross bars, a clamping seat for limiting the strip-shaped mobile phone display screen substrate is installed on the conveyor belt, an electric push rod 2 is arranged on the sliding seat outside the transverse guide rail, and a transfer adsorption unit is installed on the electric push rod 2.

[0019] A further technical improvement of the present invention is that the transfer adsorption unit includes a driving seat, the top surface of the driving seat is fixed to the pushing end of the electric push rod 2, and a flip block driven by a rotating cylinder is installed inside the driving seat, an adsorption plate is installed at the end of the flip block, and a limiting column is installed on the outer wall of the flip block, the limiting column slides in a track on the surface of the driving seat, and the track is concentric with the rotation base point of the flip block.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting up a gas inlet component and a cooling unit, after nitrogen is filled, low-temperature nitrogen flows from the surrounding area to the cutting area, absorbs heat and becomes high-temperature nitrogen, which rises and flows to the surrounding area, and flows back to the cutting area after being cooled again. Nitrogen forms convection around the cutting area. Through convection, nitrogen continuously takes away heat from the cutting area, achieving a rapid cooling effect and reducing material deformation or thermal damage caused by heat accumulation; at the same time, nitrogen acts as an inert protective gas to prevent oxidation of the display substrate by replacing oxygen around the cutting area; and the top surface of the display substrate is first cooled by rolling before laser cutting to reduce the temperature of the display substrate and reduce thermal deformation and heat The risk of damage is increased, thermal stability is increased, and processing accuracy is improved. By cooling down, the phenomenon of substrate cracks caused by high temperature during display substrate cutting is reduced, and the substrate is protected from thermal damage. Then the laser head moves along the cooling path, and the infrared detection module detects the heat at the cutting point. Then, by rotating the rotating disk, the cooling roller at the bottom is flipped clockwise or counterclockwise to change the position of the cooling roller, that is, the remaining two cooling rollers alternately reach the bottom position, and the heat absorption roller contacts the cooling roller after heat conduction to guide the heat dissipation, which is convenient for alternating use and improves the heat dissipation efficiency. When the preheating value after detection exceeds the allowable range, the cutting path is repeatedly cooled using alternating cooling rollers;

[0022] 2. By setting up a protective mechanism, before laser cutting, the pressing part is pushed down by the push cylinder. In this state, the folding and telescopic part is in an extended and open state until the bottom surface of the pressing part contacts the cooling part and stops running, thereby forming a sealed laser cutting area to avoid the splashing of cutting waste and protect the processing environment. Secondly, the protective mechanism slides horizontally and vertically with the transmission seat to adapt to the use of different processing positions on different substrates;

[0023] 3. By setting a directional feeding component, the adsorption plate adsorbs the vertical strip display screen substrate, and the display screen substrate becomes horizontal through the rotation cylinder drive rotation. Since the processing seat and the closing seat are designed as a lifting structure, after the processing seat is opened, the transfer adsorption unit slides along the sliding direction of the transverse guide rail to the top of the processing seat, and the display screen substrate is transported to the contact part, and the material is automatically loaded at a fixed point, so as to facilitate laser cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 2 It is a three-dimensional structural schematic diagram of the processing seat and the closing seat of the present invention;

[0027] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A;

[0028] Figure 4 It is a schematic diagram of the three-dimensional installation structure of the storage plate and the electromagnet of the present invention;

[0029] Figure 5 For the present invention Figure 1 A partial enlarged view of point B in the middle;

[0030] Figure 6 It is a schematic diagram of the installation structure of the cooling roller and the transmission seat of the present invention.

[0031] In the figure: 1. Processing seat; 2. Closing seat; 3. Longitudinal guide rail; 4. Sliding frame; 5. Driving screw; 6. Driving seat; 7. Chip box; 8. Support cross bar; 9. Transverse guide rail; 10. Conveyor belt; 11. Clamping seat; 12. Laser head; 13. Fixing part; 14. Electric push rod one; 15. Mounting part; 16. Folding and telescopic part; 17. Push cylinder; 18. Pressing part; 19. Storage plate; 20. Ash drop port; 21. Electromagnet; 22. Docking part; 23. Contact part; 24. Flow cavity; 25. Through groove; 26. Cooling part; 27. Charging pipe; 28. Clamping plate; 29. ​​Reset pressing block; 30. Driving seat; 31. Turning block; 32. Adsorption plate; 33. Rotating disk; 34. Cooling roller; 35. Heat absorption roller; 36. Infrared detection module. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0033] See also Figure 1-Figure 6As shown, the present invention provides a mobile phone display screen substrate laser cutting device with low thermal impact, including a cutting chamber, the cutting chamber including a processing seat 1, the top of the processing seat 1 is fitted and connected with a closed seat 2 driven to rise and fall by a hydraulic cylinder, a directional feeding component is installed on the outer side of the cutting chamber, a U-shaped storage plate 19 is fixedly provided on the inner wall surface of the processing seat 1, and a contact portion 23 for supporting the strip-shaped mobile phone display screen substrate is provided inwardly on the upper surface of the storage plate 19, and the display screen substrate is fixedly transported to the contact portion 23 through the directional feeding component, and a gas introduction component for continuously cooling the bottom surface of the strip-shaped mobile phone display screen substrate is installed inside the storage plate 19 for lifting, the hydraulic cylinder is fixed on the bracket above the closed seat 2, and a laser cutting component for horizontally cutting the strip-shaped mobile phone display screen substrate is slidably provided on the bottom surface of the inner cavity of the closed seat 2, and the laser cutting component includes a transmission seat 6 with a convex structure, and a track plate for horizontal movement is slidably provided on the bottom surface of the transmission seat 6, and an infrared detection module 36 and a laser head are sequentially provided on the bottom surface of the track plate. 12 and cooling unit, the infrared detection module 36 is an infrared detector, which detects the infrared rays radiated from the surface of the object and converts them into images for visual distinction, so as to realize the intuitive display of the temperature distribution of the surface of the object. The infrared thermal image represents different temperatures with different colors, and intuitively displays the temperature distribution of the strip mobile phone display screen substrate, so as to control the cooling unit to cool the upper surface of the strip mobile phone display screen substrate. The bottom end of the transmission seat 6 is provided with a protective mechanism; the cooling unit includes at least one electric push rod 14, the electric push rod 14 is installed on the track plate, and the pushing end of the electric push rod 14 is fixedly connected with a shaft sleeve, the inner part of the shaft sleeve is rotatably connected with a rotating disk 33, and the inner side of the rotating disk 33 is rotatably provided with three cooling rollers 34, the bottom cooling roller 34 is in rolling contact with the cutting part of the upper surface of the strip mobile phone display screen substrate, and the pushing end of the electric push rod 14 is fixedly provided with heat absorbing rollers 35 on both sides, and the heat absorbing rollers 35 are in close contact with the remaining two cooling rollers 34. When the cooling operation is performed, refer to Figure 6As shown, the electric push rod 14 descends in height, driving the rotating disk 33 and its three cooling rollers 34 to descend synchronously. At this time, the cooling roller 34 at the bottom rolls in contact with the upper surface of the strip mobile phone display substrate, thereby absorbing the heat at the cutting point, thereby reducing the overall temperature, that is, reducing the phenomenon of cracks in the substrate due to high temperature during substrate cutting by cooling, protecting the substrate from thermal damage, reducing thermal deformation of the substrate during laser cutting, and ensuring the accuracy and consistency of the cutting path. The bottom of the substrate is filled with nitrogen through the gas introduction component. Nitrogen, as an inert gas, replaces the surrounding oxygen during flow to reduce oxidation during cutting. When nitrogen is introduced into the bottom surface of the substrate, it flows from the surrounding area to the cutting area through flow, and becomes high-temperature nitrogen after absorbing heat. The high-temperature nitrogen rises and flows to the surrounding area, and flows back to the cutting area after being cooled again, forming convection around the cutting area. Through convection, the nitrogen continuously takes away heat from the cutting area. The heat generated during the cutting process is taken away to achieve a cooling effect and reduce the heat-affected zone. Cooling helps to maintain the stability of the entire substrate and reduce dimensional changes caused by temperature changes. Before the device laser cuts the display substrate, it performs cooling treatment in advance, and uses a horizontally sliding track plate to drive the cooling roller 34, the laser head 12 and the infrared detection module 36 to move synchronously. The laser head 12 moves along the path after cooling, and then detects the heat at the cutting point through the infrared detection module 36. Through the rotation of the rotating disk 33, the cooling roller 34 at the bottom is flipped clockwise or counterclockwise to change the position of the cooling roller 34, that is, the remaining two cooling rollers 34 alternately reach the bottom position, and contact the cooling roller 34 after heat conduction through the heat absorption roller 35 to guide the heat dissipation, which is convenient for alternating use and improves the heat dissipation efficiency. When the preheating value after detection exceeds the allowable range, the cutting path is repeatedly cooled using alternating cooling rollers 34.

[0034] See also Figure 1 As shown, at least one longitudinal guide rail 3 is installed on the top surface of the inner cavity of the closed seat 2, and a sliding frame 4 is slidingly arranged on the outside of the longitudinal guide rail 3. A transmission screw 5 is rotatably installed on the bottom of the sliding frame 4. The transmission screw 5 is threadedly connected to the transmission seat 6. The sliding of the sliding frame 4 in the longitudinal direction is controlled by the longitudinal guide rail 3, so that the laser head 12 in the transmission seat 6 reaches different laser cutting positions on the same substrate. The transmission seat 6 is driven by the transmission screw 5 to slide on the bottom of the sliding frame 4, so as to adapt to the laser cutting of different substrates.

[0035] See also Figure 3 and Figure 4As shown, the gas introduction component includes a cooling member 26 that is lifted and lowered in the storage plate 19, the surface of the cooling member 26 is provided with at least one through groove 25, the upper surface of the cooling member 26 is provided with a buffer layer, both sides of the through groove 25 are provided with flow channels 24 for cooling, the flow channels 24 located on both sides of the through groove 25 are connected, a charging pipe 27 for charging nitrogen is installed on one side of the cooling member 26, and a discharge pipe is provided on the other side of the cooling member 26, the charging pipe 27 and the discharge pipe are both connected with the two flow channels 24, and a suction cup for adsorbing the display screen substrate is embedded and installed on the upper surface of the cooling member 26, which is used to maintain stability during laser cutting, so that the cooling member 26 is firmly and reliably connected to the display screen substrate;

[0036] A lifting assembly is provided at the top of the inner cavity of the storage plate 19, and the lifting assembly includes an electromagnet 21, an armature in the electromagnet 21 is connected to a T-shaped rod, and the end of the T-shaped rod is connected to a docking portion 22, and the docking portion 22 is fixed to the outer wall of the cooling member 26. In the initial state, the electromagnet 21 is powered off, and the flow cavity 24 is not filled with gaseous nitrogen. When in use, the electromagnet 21 is in a powered state. At this time, the armature in the electromagnet 21 pulls the T-shaped rod and its docking portion 22, so that the buffer layer on the top surface of the cooling member 26 fits tightly with the lower surface of the substrate. At this time, the flow cavity 24 is closed by the substrate and is located on both sides of the cutting path. By filling the filling tube 27 with gaseous nitrogen, the flow of nitrogen is used to take away heat, so as to achieve a rapid cooling effect and reduce material deformation or thermal damage caused by heat accumulation; at the same time, nitrogen is used as an inert protective gas to prevent oxidation of the display substrate by replacing oxygen around the cutting area.

[0037] See also Figure 1 , Figure 3 and Figure 4 As shown, the bottom surface of the storage plate 19 is penetrated by an ash outlet 20 communicated with the through groove 25, and the bottom surface of the storage plate 19 is provided with a chip collecting box 7 movable on the bottom surface of the inner cavity of the processing seat 1. The waste chips after laser cutting enter the chip collecting box 7 through the through groove 25 and the ash outlet 20, are collected in the chip collecting box 7, and are removed from the processing seat 1 when full.

[0038] See also Figure 4As shown, at least one group of clamping components for clamping the longitudinal surface of the strip-shaped mobile phone display screen substrate is provided on the inner side of the contact portion 23, and the clamping component includes two clamping plates 28. The inner wall surface of each clamping plate 28 is elastically mounted with a reset pressure block 29 for limiting the top surface of the strip-shaped mobile phone display screen substrate. The side of the reset pressure block 29 is provided with an inclined portion. At least one group of limiting cylinders is installed on the inner wall surface of the processing seat 1. The limiting cylinder is fixed to the corresponding clamping plate 28. When the display screen substrate is placed into the contact portion 23 at a fixed point, the clamping plate 28 is pushed to move by the limiting cylinder. During the movement, the inclined portion of the reset pressure block 29 contacts the display screen substrate, causing the reset pressure block 29 to rise until the clamping plate 28 contacts the side of the display screen substrate. At this time, the reset pressure block 29 fixes the top surface of the display screen substrate to complete the positioning of the display screen substrate.

[0039] See also Figure 3 As shown, the protective mechanism includes a fixed portion 13, the bottom end of the fixed portion 13 is connected to a folding and telescopic portion 16, the end of the folding and telescopic portion 16 is connected to a pressing portion 18, the pressing portion 18 is in contact with a cooling member 26, and mounting members 15 are installed on the outer sides of the pressing portion 18 and the fixed portion 13, and a push cylinder 17 is installed on the surface of the upper mounting member 15, and the pushing end of the push cylinder 17 is fixed to the lower mounting member 15. Before the display screen substrate is cut horizontally, the pressing portion 18 is pushed downward by the push cylinder 17. In this state, the folding and telescopic portion 16 is in an extended and open state until the bottom surface of the pressing portion 18 contacts the cooling member 26 and stops running, thereby forming a sealed laser cutting area to avoid cutting waste from splashing everywhere and protect the processing environment. Secondly, the protective mechanism slides horizontally and vertically with the transmission seat 6 to adapt to the use of different processing positions on different substrates.

[0040] See also Figure 1 , Figure 2 and Figure 5 As shown, the directional feeding assembly includes support cross bars 8 arranged on both sides of the processing seat 1, the height of the support cross bars 8 is higher than the height of the processing seat 1, and a transverse guide rail 9 is installed on the bottom surface of the support cross bars 8, a conveyor belt 10 is arranged below the support cross bars 8, and a clamping seat 11 for limiting the position of the strip mobile phone display screen substrate is installed on the conveyor belt 10, and an electric push rod 2 is arranged on the sliding seat outside the transverse guide rail 9, and a transfer adsorption unit is installed on the electric push rod 2. Initially, the strip display screen substrate in a vertical state is transported by the clamping seat 11 on the conveyor belt 10, and the transfer adsorption unit is adsorbed on the side of the strip display screen substrate and then turned clockwise by 90 degrees. At this time, the display screen substrate becomes horizontal. Refer to Figure 5 As shown, the closing seat 2 then rises under the driving force of the hydraulic cylinder, and the processing seat 1 is opened at this time, and the transfer adsorption unit slides along the sliding direction of the transverse guide rail 9 to enter the top of the processing seat 1, and transports the display screen substrate to the contact portion 23;

[0041] The transfer adsorption unit includes a driving seat 30, the top surface of which is fixed to the pushing end of the electric push rod 2, and a flip block 31 driven by a rotating cylinder is installed inside the driving seat 30, and an adsorption plate 32 is installed at the end of the flip block 31, and the display screen substrate is adsorbed and fixed by the adsorption plate 32. A limiting column is installed on the outer wall of the flip block 31, and the limiting column slides in a track on the surface of the driving seat 30. The track is concentric with the rotation base point of the flip block 31. During the flipping process, the flip block 31 is driven to rotate by the rotating cylinder. During this process, the limiting column slides in the track to ensure the stable rotation of the flip block 31 and the driving seat 30.

[0042] When the present invention is used, the vertical strip display screen substrate is firstly adsorbed by the adsorption plate 32, and then rotated 90 degrees by the rotary cylinder, so that the display screen substrate becomes horizontal. Since the processing seat 1 and the closing seat 2 are designed as a lifting structure, after the processing seat 1 is opened, the transfer adsorption unit slides along the sliding direction of the transverse guide rail 9 to enter the upper part of the processing seat 1, and the display screen substrate is transported to the contact part 23, and the material is automatically loaded at a fixed point, so as to facilitate laser cutting;

[0043] Before laser cutting, the pressing part 18 is pushed downward by the push cylinder 17. In this state, the folding and telescopic part 16 is in an extended and open state until the bottom surface of the pressing part 18 contacts the cooling member 26 and stops running, thereby forming a sealed laser cutting area to avoid the splashing of cutting waste and protect the processing environment. Secondly, the protective mechanism follows the transmission seat 6 to slide horizontally and vertically to adapt to the use of different processing positions on different substrates;

[0044] At the same time, the cooling member 26 at the bottom of the display screen substrate moves upward, so that the buffer layer on its top surface is tightly fitted with the lower surface of the display screen substrate. At this time, the flow cavity 24 is closed by the display screen substrate and is located on both sides of the cutting path, that is, the gas introduction component starts to work normally, and nitrogen is filled. The low-temperature nitrogen flows from the surrounding area to the cutting area, and becomes high-temperature nitrogen after absorbing heat. The high-temperature nitrogen rises and flows to the surrounding area, and flows back to the cutting area after being cooled again. The nitrogen forms convection around the cutting area. Through convection, the nitrogen continuously takes away the heat from the cutting area, achieving the effect of rapid cooling, reducing material deformation or thermal damage caused by heat accumulation; at the same time, nitrogen acts as an inert protective gas, which prevents oxidation of the display screen substrate by replacing the oxygen around the cutting area, and the top of the display screen substrate The surface is first cooled in a rolling manner before laser cutting. The laser head 12 moves along the path after cooling, and then the heat at the cutting point is detected by the infrared detection module 36. After that, the rotating disk 33 rotates and the cooling roller 34 at the bottom is flipped clockwise or counterclockwise to change the position of the cooling roller 34, that is, the remaining two cooling rollers 34 alternately reach the bottom position, and the heat absorption roller 35 contacts the cooling roller 34 after heat conduction to guide the heat to dissipate, which is convenient for alternating use and improves the heat dissipation efficiency. When the preheating value after detection exceeds the allowable range, the cutting path is repeatedly cooled by alternating cooling rollers 34. By cooling, the phenomenon of cracks in the substrate of the display screen caused by high temperature during cutting is reduced, the substrate is protected from thermal damage, and the thermal deformation of the substrate during laser cutting is reduced.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A low heat impact mobile phone display screen substrate laser cutting equipment, characterized in that: The cutting chamber comprises a processing seat (1), the top end of the processing seat (1) is closely connected to a closed seat (2) driven to rise and fall by a hydraulic cylinder, a directional material feeding assembly is installed on the outside of the cutting chamber, a U-shaped storage plate (19) is fixedly provided on the inner wall surface of the processing seat (1), a contact portion (23) for supporting a strip-shaped mobile phone display screen substrate is provided inwardly on the upper surface of the storage plate (19), and a gas introduction assembly for continuously cooling the bottom surface of the strip-shaped mobile phone display screen substrate is installed in the storage plate (19); The hydraulic cylinder is fixed on a bracket above the closed seat (2); a laser cutting assembly for transversely cutting a strip-shaped mobile phone display screen substrate is slidably arranged on the bottom surface of the inner cavity of the closed seat (2); the laser cutting assembly comprises a transmission seat (6) of a convex structure; a track plate for transverse movement is slidably arranged on the bottom surface of the transmission seat (6); an infrared detection module (36), a laser head (12) and a cooling unit are arranged in sequence on the bottom surface of the track plate; the infrared detection module (36) is an infrared detector; and a protective mechanism is arranged at the end of the bottom surface of the transmission seat (6); The cooling unit comprises at least one electric push rod (14), wherein the electric push rod (14) is mounted on a track plate, and a push end of the electric push rod (14) is fixedly connected to a shaft sleeve, and a rotating disk (33) is rotatably connected to the inside of the shaft sleeve, and three cooling rollers (34) are rotatably arranged on the inner side of the rotating disk (33), and the bottom cooling roller (34) is in rolling contact with the cut portion of the upper surface of the strip-shaped mobile phone display screen substrate, and heat absorbing rollers (35) are fixedly arranged on both sides of the push end of the electric push rod (14), and the heat absorbing rollers (35) are in close contact with the remaining two cooling rollers (34); The gas introduction component comprises a cooling member (26) which is lifted and lowered in a storage plate (19), the surface of the cooling member (26) being provided with at least one through groove (25), and the upper surface of the cooling member (26) being provided with a buffer layer, both sides of the through groove (25) being provided with flow channels (24) for cooling, the flow channels (24) located on both sides of the through groove (25) being connected, a charging pipe (27) for charging nitrogen being installed on one side of the cooling member (26), and a discharge pipe being provided on the other side of the cooling member (26), the charging pipe (27) and the discharge pipe being connected with the two flow channels (24); A lifting assembly is provided at the top of the inner cavity of the storage plate (19), the lifting assembly comprising an electromagnet (21), an armature in the electromagnet (21) is connected to a T-shaped rod, an end of the T-shaped rod is connected to a docking portion (22), and the docking portion (22) is fixed to the outer wall surface of the cooling member (26); The bottom surface of the storage plate (19) is provided with an ash drop opening (20) communicating with the through groove (25), and the bottom surface of the storage plate (19) is provided with a chip collection box (7) movable on the bottom surface of the inner cavity of the processing seat (1); The protective mechanism comprises a fixed portion (13), the bottom end of the fixed portion (13) is connected to a folding and telescopic portion (16), the end of the folding and telescopic portion (16) is connected to a pressing portion (18), the pressing portion (18) is in contact with a cooling member (26), the outer sides of the pressing portion (18) and the fixed portion (13) are both installed with mounting members (15), the surface of the upper mounting member (15) is installed with a push cylinder (17), and the pushing end of the push cylinder (17) is fixed to the lower mounting member (15); After being filled with nitrogen, low-temperature nitrogen flows from the surrounding area to the cutting area, and becomes high-temperature nitrogen after absorbing heat. The high-temperature nitrogen rises and flows to the surrounding area, and then flows back to the cutting area after being cooled again. Nitrogen forms convection around the cutting area, and through convection, nitrogen continuously takes away heat from the cutting area.

2. According to the low thermal impact laser cutting equipment for mobile phone display screen substrates according to claim 1, it is characterized in that: At least one longitudinal guide rail (3) is installed on the top surface of the inner cavity of the closed seat (2); a sliding frame (4) is slidably arranged outside the longitudinal guide rail (3); a transmission screw (5) is rotatably installed at the bottom of the sliding frame (4); and the transmission screw (5) is threadedly connected to the transmission seat (6).

3. The low heat impact laser cutting device for mobile phone display screen substrate according to claim 1 is characterized in that: The inner side of the contact portion (23) is provided with at least one group of clamping components for clamping the longitudinal surface of the strip-shaped mobile phone display screen substrate, the clamping components comprising two clamping plates (28), the inner wall surface of each clamping plate (28) being elastically mounted with a reset pressing block (29) for limiting the top surface of the strip-shaped mobile phone display screen substrate, and the inner wall surface of the processing seat (1) is mounted with at least one group of limiting cylinders, the limiting cylinders being fixed to the corresponding clamping plates (28).

4. The low thermal impact laser cutting device for mobile phone display screen substrate according to claim 1 is characterized in that: The directional feeding assembly comprises a supporting cross bar (8) arranged on both sides of a processing seat (1), the height of the supporting cross bar (8) being higher than the height of the processing seat (1), and a transverse guide rail (9) being installed on the bottom surface of the supporting cross bar (8), a conveyor belt (10) being arranged below the supporting cross bar (8), a clamping seat (11) for limiting the position of a strip-shaped mobile phone display screen substrate being installed on the conveyor belt (10), and an electric push rod 2 being arranged on a sliding seat outside the transverse guide rail (9), and a transfer adsorption unit being installed on the electric push rod 2.

5. The low heat impact laser cutting device for mobile phone display screen substrate according to claim 4 is characterized in that: The transfer adsorption unit comprises a drive seat (30), the top surface of the drive seat (30) is fixed to the pushing end of the second electric push rod, and a flip block (31) driven by a rotary cylinder is installed inside the drive seat (30), an adsorption plate (32) is installed at the end of the flip block (31), and a limit column is installed on the outer wall surface of the flip block (31), the limit column slides in a track on the surface of the drive seat (30), and the track is cocentric with the rotation base point of the flip block (31).

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