CN110202271B

CN110202271B - Laser cutting method

Info

Publication number: CN110202271B
Application number: CN201810166062.8A
Authority: CN
Inventors: 王有德; 杨关伟; 张红岩; 丁培
Original assignee: Shenzhen Yuzhan Precision Technology Co ltd
Current assignee: Fulian Yuzhan Technology Shenzhen Co Ltd
Priority date: 2018-02-28
Filing date: 2018-02-28
Publication date: 2021-06-25
Anticipated expiration: 2038-02-28
Also published as: CN110202271A

Abstract

The invention provides a laser cutting method, which comprises the following steps: providing a laser cutting device, wherein the laser cutting device comprises a machine table, a conveying mechanism, a cutting mechanism, a standing mechanism and a splitting mechanism, the cutting mechanism comprises a movable platform and a laser cutter, and the splitting mechanism comprises a fixed jig and at least one heating laser; the conveying mechanism is used for picking and placing the workpiece on the moving platform; the laser cutter emits laser beams to pre-cut the workpiece on the moving platform and form a pre-cutting line; the conveying mechanism is used for taking and placing the pre-cut workpiece from the moving platform to the standing mechanism and standing for preset time; the conveying mechanism is used for taking and placing the workpiece after standing from the standing mechanism onto the fixed jig; each heating laser emits a laser beam to heat the workpiece on the fixed jig along the pre-cutting line, so that the workpiece is split under the impact of thermal stress along the pre-cutting line to realize the cutting of the workpiece. The laser cutting method has high cutting yield.

Description

Laser cutting method

Technical Field

The invention relates to a cutting method, in particular to a laser cutting method for cutting a glass workpiece.

Background

The existing glass cutting equipment mainly adopts a traditional glass cutter to cut a workpiece. However, the above-mentioned cut glass workpiece is prone to edge breakage, and the edge strength of the glass workpiece is weak, and then the CNC cutting treatment is required, which increases the manufacturing process and increases the cost. Meanwhile, the method for processing the glass workpiece by adopting the laser has complex process and is easy to generate the phenomenon of fragments in the splitting process, thereby reducing the processing yield.

Disclosure of Invention

In view of the above, it is desirable to provide a laser cutting method with high cutting yield.

A laser cutting method, comprising the steps of:

providing a laser cutting device, wherein the laser cutting device comprises a machine table, a conveying mechanism, a cutting mechanism, a standing mechanism and a splitting mechanism, the conveying mechanism, the cutting mechanism, the standing mechanism and the splitting mechanism are arranged on the machine table, the cutting mechanism comprises a moving platform and a laser cutter, the moving platform is arranged on the machine table and is used for placing a workpiece and driving the workpiece to move, the laser cutter is used for emitting a laser beam, the splitting mechanism comprises a fixed jig and at least one heating laser, and the heating laser can heat the workpiece;

the conveying mechanism is used for taking and placing the workpiece onto the moving platform;

the laser cutter emits laser beams to pre-cut the workpiece on the moving platform and form a pre-cutting line;

the conveying mechanism is used for taking and placing the pre-cut workpiece from the moving platform to the standing mechanism and standing for preset time;

the conveying mechanism is used for taking and placing the workpiece after standing from the standing mechanism onto the fixed jig;

each heating laser emits a laser beam to heat the workpiece on the fixed jig along the pre-cutting line, so that the workpiece is split along the pre-cutting line under the impact of thermal stress to realize the cutting of the workpiece.

According to the laser cutting method, the workpiece after precutting is fixed and stood for the preset time through the standing mechanism of the machine table, so that the thermal stress generated in the precutting process is effectively released by the workpiece, the thermal stress generated in the heating process of the splitting mechanism of the workpiece is uniform, the workpiece is prevented from being cracked, and the cutting yield is improved.

Drawings

Fig. 1 is a perspective view of a laser cutting apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a feeding mechanism of the laser cutting apparatus in fig. 1.

Fig. 3 is a perspective view of a stationary mechanism of the laser cutting apparatus of fig. 1.

Fig. 4 is a perspective view of a blanking mechanism of the laser cutting apparatus of fig. 1.

Fig. 5 is a schematic flow chart illustrating a laser cutting method using the laser cutting apparatus of fig. 1 according to an embodiment of the present invention.

Description of the main elements

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element or component is referred to as being "connected" to another element or component, it can be directly connected to the other element or component or intervening elements or components may also be present. When an element or component is referred to as being "disposed on" another element or component, it can be directly on the other element or component or intervening elements or components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a laser cutting apparatus 100 according to a first embodiment of the present invention is used for cutting a workpiece 200. The laser cutting device 100 includes a machine table 10, a feeding mechanism 20, a conveying mechanism 30, a cutting mechanism 40, a standing mechanism 50, a splitting mechanism 60, and a discharging mechanism 70. The feeding mechanism 20, the conveying mechanism 30, the cutting mechanism 40, the standing mechanism 50, the splitting mechanism 60 and the discharging mechanism 70 are disposed on the machine table 10. The feeding mechanism 20 is used for sequentially feeding the stacked workpieces 200. The conveyance mechanism 30 is used to convey the workpiece 200. The cutting mechanism 40 is used to pre-cut the workpiece 200 along a pre-set cutting path. The standing mechanism 50 is used for standing and radiating the workpiece 200 processed by the cutting mechanism 40. The splitting mechanism 60 is used for heating the workpiece 200 after standing to split the workpiece 200 along a cutting path, thereby achieving the purpose of cutting. The blanking mechanism 70 is used to blank the cut workpiece 200. In this embodiment, the workpiece 200 is a glass plate.

The machine table 10 includes a first frame 11, a first support plate 12, a second frame 13, a second support plate 14, a third frame 15, and a third support plate 16. The first frame 11 is a substantially rectangular frame. The first support plate 12 is disposed on the first frame 11. The second chassis 13 is a substantially rectangular frame. The second frame 13 is disposed at one side of the first frame 11 and near one end of the first frame 11. The second frame 13 and the first frame 11 form an L shape. The second support plate 14 is disposed on the second frame 13. The third chassis 15 is a substantially rectangular frame. The third frame 15 is adjacent to the second frame 13 and the first frame 11. The third support plate 16 is disposed on the third frame 15. The feeding mechanism 20, the conveying mechanism 30 and the standing mechanism 50 are disposed on the first support plate 12. The blanking mechanism 70 is provided to the second support plate 14. The cutting mechanism 40 and the splinter mechanism 60 are disposed on the third support plate 16. In this embodiment, the second supporting plate 14 has a through hole 141.

Referring to fig. 1 and fig. 2, the feeding mechanism 20 includes a fixing plate 21, a screw nut 22, a screw 23, at least one guide rod 24, a mounting plate 25, a feeding driving member 26, a supporting plate 27, and a protection frame 28. The fixing plate 21 is disposed on a side of the first support plate 12 of the machine table 10 facing the first frame 11. The screw nut 22 is inserted into the fixed plate 21 and located at a substantially central position of the fixed plate 21. The screw 23 is inserted into the screw nut 22 and screwed to the screw nut 22. Each guide rod 24 is slidably disposed through the fixed plate 21. A mounting plate 25 is provided on one end of each guide bar 24 and is located within the first housing 11. The feeding driving member 26 is disposed on the mounting plate 25 and connected to one end of the screw 23 to drive the screw 23 to rotate. A plate 27 is provided at the other end of each guide bar 24 and is connected to the end of the screw 23 remote from the mounting plate 25. The pallet 27 is used to place a plurality of workpieces 200. A guard 28 is provided on the pallet 27 to protect the stack of workpieces 200. The rotating lead screw 23 moves the pallet 27 by the lead screw nut 22, and thus moves the plurality of workpieces 200 on the pallet 27. In this embodiment, the number of the guide rods 24 is two, and the feeding driving member 26 is a servo motor.

Referring again to fig. 1, the transfer mechanism 30 includes a first transfer robot 31 and a second transfer robot 32. The first transfer robot 31 and the second transfer robot 32 are sequentially disposed on the first support plate 12 near an edge (not labeled) of the first support plate 12. The first conveying robot 31 is configured to sequentially pick and place the plurality of workpieces 200 on the pallet 27 to the cutting mechanism 40 and pick and place the pre-cut workpieces 200 to the standing mechanism 50. The second transfer robot 32 can pick and place the workpiece 200 on the standing mechanism 50 onto the splitting mechanism 60 and the workpiece 200 on the splitting mechanism 60 onto the blanking mechanism 70.

The cutting mechanism 40 includes a moving platform 41 and a laser cutter 42. The moving platform 41 is disposed on the first support plate 12 and close to the feeding mechanism 20. The moving platform 41 is used for fixing the workpiece 200 transferred by the first transfer robot 31 and can drive the workpiece 200 to move in two-dimensional directions according to a preset route. The laser cutter 42 is provided on the third support plate 16. The laser cutter 42 is used to emit a picosecond laser beam to precut the workpiece 200 on the moving platform 41 and form a precut line. In this embodiment, the laser cutter 42 is capable of processing a plurality of equally spaced holes (not shown) along a predetermined cutting path on the workpiece 200, and the equally spaced holes form a pre-cut line.

Referring to fig. 1 and fig. 3, the resting mechanism 50 includes a fixing frame 51, a supporting plate 52, a plurality of positioning members 53, and two clamping assemblies 54. The fixing frame 51 is disposed on the first supporting plate 12 of the machine 10. The carrier plate 52 is disposed on the fixing frame 51. The carrier plate 52 is formed with a receiving groove 521. The receiving groove 521 is opened on a side of the loading plate 52 away from the fixing frame 51 and is located at a substantially central position of the loading plate 52. The receiving groove 521 is used for receiving and placing the pre-cut workpiece 200. A plurality of positioning members 53 are disposed on the carrier plate 52 and close to two opposite side edges (not labeled) of the carrier plate 52 for positioning the workpiece 200 in the receiving slot 521. Two clamping assemblies 54 are disposed on the carrier plate 52 and are respectively adjacent to two opposite edges (not labeled) of the carrier plate 52. Each clamp assembly 54 includes at least one clamp driving member 541 and a clamp member 542. Each clamping driving member 541 is disposed on the carrier plate 52 and is close to an edge (not labeled) of one side of the receiving slot 521. The clamping member 542 is disposed on each clamping driving member 541 and driven by each clamping driving member 541 to move to abut against the workpiece 200 in the receiving slot 521, so as to clamp and fix the workpiece 200. In this embodiment, the number of the clamping driving members 541 of each clamping assembly 54 is three, and the clamping driving members 541 are linear cylinders.

As shown in fig. 1, the splitting mechanism 60 includes a fixing jig 61 and at least one heating laser 62. The fixing fixture 61 is disposed on the first supporting plate 12 of the machine 10. The fixing jig 61 is used for fixing and placing the workpiece 200 after standing. At least one heating laser 62 is disposed on the third supporting plate 16 of the machine 10 and faces the fixing fixture 61. Each heating laser 62 is capable of emitting a laser beam to heat the workpiece 200 located on the fixing jig 61 along the pre-cut line, so that the workpiece 200 is split along the pre-cut line to realize cutting of the workpiece 200. In this embodiment, the heating laser 62 is a carbon dioxide laser.

Referring to fig. 1 and 4, the blanking mechanism 70 includes a transfer platform 71, a blanking manipulator 72, a blanking assembly 73, and a tray platform 74. The transfer table 71 is disposed on the first support plate 12 of the machine 10 for placing the split workpiece 200. The feeding robot 72 is disposed on the second supporting plate 14 of the machine 10. The blanking manipulator 72 can pick and place the work 200 split on the transfer table 71 onto the blanking assembly 73. The blanking assembly 73 includes a first fixing part 731, at least one guide bar 732, a second fixing part 733, a lead screw 734, a lead screw nut 735, a blanking driving part 736, and a bracket 737. The first fixing member 731 has a substantially elongated plate shape. The first fixing part 731 is disposed on a side of the second support plate 14 facing the second frame 13. One end of each guide bar 732 is disposed on the first fixing piece 731. The second fixing member 733 has a substantially elongated plate shape. A second fixing part 733 is provided at the other end of each guide bar 732. Both ends of the screw 734 are rotatably disposed on the first fixing part 731 and the second fixing part 733, respectively. The lead screw nut 735 is sleeved on the lead screw 734 and is screwed with the lead screw 734. The blanking driving member 736 is disposed on the second fixing member 733 and connected to one end of the screw 734. The blanking drive 736 can drive the lead screw 734 in rotation, thereby moving the lead screw nut 735. The bracket 737 is disposed on the lead screw nut 735 and moves through the through hole 141 under the driving of the lead screw nut 735. The bracket 737 is used for placing the tray 300. The tray table 74 is disposed on the second supporting plate 14 of the machine table 10 and close to the through hole 141. The tray table 74 is used to place a plurality of trays 300 of the stack. In this embodiment, the blanking driving member 736 is a servo motor.

Referring to fig. 1 to 5, a preferred embodiment of the laser cutting method for cutting a workpiece 200 by using the laser cutting apparatus 100 of the present invention includes the following steps:

step S101: a plurality of workpieces 200 are stacked on a pallet 27 of the feed mechanism 20.

Specifically, the loading driving member 26 drives the screw 23 to rotate so as to bring the pallet 27 close to the first transfer robot 31.

Step S102: the first transfer robot 31 picks up the workpiece 200 on the pallet 27 onto the moving platform 41 of the cutting mechanism 40.

Step S103: the laser cutter 42 emits a laser beam to pre-cut the workpiece 200 on the moving platform 41 and form a pre-cut line.

Specifically, the laser cutter 42 emits a laser beam to focus on the workpiece 200 located on the moving platform 41, and the moving platform 41 drives the workpiece 200 to move in a two-dimensional direction according to a preset track, so that the laser cutter 42 can machine small holes (not shown) with equal intervals on the workpiece 200 along a preset cutting path, and the small holes with equal intervals form a pre-cut line.

Step S104: the first conveying robot 31 of the conveying mechanism 30 takes and places the pre-cut workpiece 200 from the moving platform 41 onto the standing mechanism 50 and stands for a preset time.

Specifically, the first conveying robot 31 picks and places the pre-cut workpiece 200 from the moving platform 41 into the accommodating slot 521 of the standing mechanism 50 and between the positioning members 53, and the clamping driving member 541 of each clamping assembly 54 drives the clamping member 542 to abut against the workpiece 200 in the accommodating slot 521, so as to clamp and fix the workpiece 200 and perform standing for a preset time.

In this embodiment, the workpiece 200 on the standing mechanism 50 is allowed to stand for a predetermined time in a range of 300 seconds to 350 seconds.

Step S105: the second transfer robot 32 of the transfer mechanism 30 takes the workpiece 200 after standing still from the standing mechanism 50 to the fixing jig 61 of the splitting mechanism 60.

Step S106: each heating laser 62 emits a laser beam to heat the workpiece 200 located on the fixing jig 61 along the pre-cut line, so that the workpiece 200 is split along the pre-cut line under the impact of thermal stress to achieve cutting of the workpiece 200.

Step S107: the second transfer robot 32 and the blanking mechanism 70 blank the workpiece 200 after the splitting.

Specifically, the second conveying manipulator 32 takes the split workpiece from the fixing jig 61 onto the transfer table 71 of the blanking mechanism 70, the blanking manipulator 72 sequentially takes the workpiece 200 on the transfer table 71 into the tray 300 on the bracket 737, and the blanking driving member 736 drives the screw 734 to rotate to drive the bracket 737 and the tray 300 to move, thereby completing blanking and material collection.

It is understood that step S107 may be eliminated, and the cut workpiece 200 is received manually, without affecting the cutting of the workpiece 200.

The laser cutting apparatus 100 includes a machine table 10, a feeding mechanism 20, a conveying mechanism 30, a cutting mechanism 40, a standing mechanism 50, a splitting mechanism 60, and a blanking mechanism 70, but is not limited thereto, in other embodiments, the feeding mechanism 20 and the blanking mechanism 70 may be eliminated, and the workpiece 200 is directly placed on the cutting mechanism 40 via the conveying mechanism 30 without affecting the cutting of the workpiece 200.

The resting mechanism 50 includes a fixing frame 51, a supporting plate 52, a plurality of positioning members 53 and two clamping members 54, but not limited thereto, in other embodiments, the plurality of positioning members 53 can be eliminated, and the workpiece 200 can be directly placed on the supporting plate 52 without affecting the clamping and fixing of the clamping members 54 to the workpiece 200.

The feeding mechanism 20 includes a fixing plate 21, a screw nut 22, a screw 23, at least one guide rod 24, a mounting plate 25, a feeding driving member 26, a supporting plate 27 and a protecting frame 28, but not limited thereto, in other embodiments, the at least one guide rod 24 and the protecting frame 28 may be eliminated, the mounting plate 25 is disposed on the screw 23 and near one end of the screw 23, and the screw 23 can rotate relative to the mounting plate 25 without affecting the movement of the screw 23 driving the supporting plate 27.

The blanking mechanism 70 includes a transfer table 71, a blanking robot 72, a blanking assembly 73, and a tray table 74, but is not limited thereto, and in other embodiments, the tray table 74 can be removed, and the tray 300 can be manually placed on the supporting plate 27 of the blanking assembly 73 directly without affecting the placement of the tray 300 on the supporting plate 27 of the blanking assembly 73.

According to the laser cutting device 100 and the laser cutting method, the standing mechanism 50 is arranged on the machine table 10 to fix and stand the pre-cut workpiece 200 for the preset time, so that the thermal stress generated in the pre-cutting process is effectively released by the workpiece 200, the thermal stress generated in the heating process of the splitting mechanism 60 by the workpiece 200 is uniform, the cracking is avoided, and the cutting yield is improved.

In addition, other modifications within the spirit of the invention may occur to those skilled in the art, and such modifications are, of course, included within the scope of the invention as claimed.

Claims

1. A laser cutting method, comprising the steps of:

2. The laser cutting method of claim 1, wherein: the workpiece on the standing mechanism is kept standing for a preset time range from 300 seconds to 350 seconds.

3. The laser cutting method of claim 1, wherein: the laser cutter emits laser beams to be focused on a workpiece on the moving platform, and the moving platform drives the workpiece to move in a two-dimensional direction according to a preset track, so that the laser cutter can process a plurality of equally spaced small holes on the workpiece along a preset cutting path, and the equally spaced small holes form the precutting line.

4. The laser cutting method of claim 1, wherein: the standing mechanism comprises a fixing frame, a bearing plate and two clamping assemblies, wherein the fixing frame is arranged on the machine table, the bearing plate is arranged on the fixing frame to place the workpiece, the two clamping assemblies are arranged on the bearing plate and are respectively close to two opposite side edges of the bearing plate, each clamping assembly comprises a clamping piece and at least one clamping driving piece, each clamping driving piece is arranged on the bearing plate and is close to one side edge of the bearing plate, and the clamping pieces are arranged on each clamping driving piece and move under the driving of the corresponding clamping driving pieces to abut against the workpiece so as to clamp and fix the workpiece and enable the workpiece to stand for a preset time.

5. The laser cutting method according to claim 4, wherein: the bearing plate is provided with an accommodating groove, the accommodating groove is arranged on one side of the bearing plate, which is far away from the fixing frame, and is positioned in the central position of the bearing plate, and the accommodating groove is used for accommodating and placing the pre-cut workpiece.

6. The laser cutting method according to claim 5, wherein: the standing mechanism further comprises a plurality of positioning pieces, and the positioning pieces are arranged on the bearing plate and close to the edges of the other two opposite sides of the bearing plate so as to position the workpiece in the accommodating groove.

7. The laser cutting method according to claim 6, wherein: the machine table comprises a first machine frame, a first supporting plate, a second machine frame, a second supporting plate, a third machine frame and a third supporting plate, wherein the first machine frame, the second machine frame and the third machine frame are rectangular frames, the first supporting plate is arranged on the first machine frame, the second machine frame is arranged on one side of the first machine frame and close to one end of the first machine frame, the second machine frame and the first machine frame form an L shape, the second supporting plate is arranged on the second machine frame, the third machine frame is close to the second machine frame and the first machine frame, the third supporting plate is arranged on the third machine frame, the conveying mechanism, the moving platform and the fixing frame are arranged on the first supporting plate, and the laser cutter and the splinter mechanism are arranged on the third supporting plate.

8. The laser cutting method according to claim 7, wherein: this laser cutting device still includes feed mechanism, this feed mechanism includes the fixed plate, screw nut, the lead screw, the mounting panel, material loading driving piece and layer board, this fixed plate sets up on one side of this first backup pad towards this first frame, this screw nut wears to locate on this fixed plate and is located the central point of this fixed plate, this lead screw wears to locate on this screw nut and closes with this screw nut spiral shell, this mounting panel sets up on this lead screw and is close to the one end of this lead screw, this material loading driving piece sets up on this mounting panel and is connected with this lead screw of drive with the one end of this lead screw and rotates, the one end that this mounting panel was kept away from to this layer board and this lead screw is connected, this layer board is used for placing a plurality of these work pieces, thereby this lead screw of pivoted drives this layer board removal and drives a plurality of work pieces that are located on this layer board under this screw.

9. The laser cutting method of claim 8, wherein: this feed mechanism still includes at least one guide arm and protection frame, and every this guide arm wears to locate on this fixed plate with sliding, and this mounting panel sets up in one of every this guide arm and serves, and this layer board sets up on the other end of every this guide arm, and this protection frame sets up on this layer board in order to protect a plurality of these work pieces of piling up.

10. The laser cutting method of claim 9, wherein: the second support plate is provided with a through hole in a penetrating way, the laser cutting device also comprises a blanking mechanism, the blanking mechanism is used for blanking and receiving the workpiece after splitting, the blanking mechanism comprises a transfer platform, a blanking manipulator and a blanking assembly, the transfer platform is arranged on the first support plate for placing the workpiece after splitting, the blanking manipulator is arranged on the second support plate and can take and place the workpiece after splitting on the transfer platform onto the blanking assembly, the blanking assembly comprises a first fixing piece, at least one guide rod, a second fixing piece, a lead screw nut, a blanking driving piece and a bracket, the first fixing piece is arranged on one side of the second support plate facing the second rack, one end of each guide rod is arranged on the first fixing piece, and the second fixing piece is arranged at the other end of each guide rod, the two ends of the screw rod are respectively and rotatably arranged on the first fixing piece and the second fixing piece, the screw rod nut is sleeved on the screw rod and is screwed with the screw rod, the blanking driving piece is arranged on the second fixing piece and is connected with one end of the screw rod, the blanking driving piece can drive the screw rod to rotate, the bracket is arranged on the screw rod nut and moves under the driving of the screw rod nut and penetrates through the through hole, and the bracket is used for placing a material tray.

11. The laser cutting method of claim 10, wherein: this unloading mechanism still includes the charging tray platform, and this charging tray platform sets up in this second backup pad and is close to this through-hole, and this charging tray platform is used for placing a plurality of these charging trays of buttress folding.

12. The laser cutting method of claim 10, wherein: the conveying mechanism comprises a first conveying mechanical arm and a second conveying mechanical arm, the first conveying mechanical arm and the second conveying mechanical arm are sequentially arranged on the first supporting plate and are close to one edge of the first supporting plate, the first conveying mechanical arm is used for sequentially taking and placing a plurality of workpieces on the supporting plate onto a moving platform of the cutting mechanism and taking and placing the pre-cut workpieces onto a bearing plate of the standing mechanism, and the second conveying mechanical arm can take and place the workpieces on the bearing plate onto a fixing jig of the splitting mechanism and take and place the workpieces on the fixing jig onto the transfer table.