Laser processing perforation detection mechanism

Abstract

The utility model discloses a laser processing perforation detection mechanism, which comprises a mounting seat, an induction space and a reflection space are arranged in the mounting seat, a reflection unit is used for reflecting light beams and entering the induction space, a control module comprises a driving mechanism and a plurality of blades, and the blades are circumferentially arranged along the axis of a through passage. The driving mechanism is connected with the multiple blades and drives the multiple blades to move at the same time so as to control the coverage range of the multiple blades on the control end, the sensing unit is located in the sensing space and used for receiving and detecting the intensity of light beams, and the size of a through channel is adjusted by arranging a control module at the control end. The laser head is provided with the through channel, dispersion of light beams in the laser head is reduced, the light beams are more concentrated in the through channel, the detection precision is improved, the multiple blades are adjusted at the same time through the driving mechanism, the large adjusting range can be obtained, and meanwhile the overall structure is more compact and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of laser processing, and more specifically to a laser processing perforation detection mechanism. Background Art

[0002] Laser perforation detection refers to the detection of a workpiece after a laser beam penetrates it during the laser beam processing, so as to adjust the laser and avoid subsequent damage to machine tools by the laser beam. Currently, most perforation detection methods collect the light reflected by the laser on the material surface. When the laser beam penetrates the workpiece, the intensity of this light changes significantly, thereby completing the perforation detection.

[0003] Most of the existing perforation detection mechanisms are arranged inside the laser head. The light from the nozzle enters the laser head and is reflected by the reflection component to the induction unit to complete the recognition effect. Due to the need for the laser beam itself inside the laser head, a channel for the laser beam to pass through is provided on the perforation detection mechanism. Since the size of the laser beam inside the laser head will be adjusted according to the usage requirements, such channels are all relatively large, resulting in the light reflected by the workpiece not being easily concentrated and the detection accuracy decreasing. Therefore, it needs to be improved. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a laser processing perforation detection mechanism that can adjust the size of the channel to make the light more concentrated, thereby improving the detection accuracy.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A laser processing perforation detection mechanism includes a mounting base. An induction space and a reflection space are arranged horizontally inside the mounting base. A through passage is formed on the reflection space, and a control end is formed at the upper end of the through passage. A reflection unit is arranged inside the through passage. A light beam passage is formed between the induction space and the reflection space. The reflection unit is used to reflect the light beam and enter the induction space along the light beam passage.

[0007] A control module, which includes a driving mechanism and a plurality of blades. The plurality of blades are arranged circumferentially along the axis of the through passage. The driving mechanism is connected to the plurality of blades and drives the plurality of blades to move simultaneously to control the range size of the control end covered by the plurality of blades.

[0008] An induction unit, which is located inside the induction space and is used to receive and detect the light beam intensity.

[0009] As a further improvement of the present utility model, a control cavity and a storage cavity are provided in the mounting base in an up-and-down arrangement. A plurality of the blades are all located in the storage cavity. One end of each blade is provided with a rotating rod, and the blade is rotationally connected to the storage cavity through the rotating rod. One end of the rotating rod passes through the storage cavity and is located in the control cavity. The driving mechanism is located in the control cavity and is simultaneously connected to one end of a plurality of rotating rods. The driving mechanism is used to drive the plurality of rotating rods to rotate in the same direction.

[0010] As a further improvement of the present utility model, the driving mechanism includes a toothed ring. The toothed ring is rotationally connected to the control cavity. One end of the rotating rod is provided with a control gear corresponding to the control cavity. The inner side of the toothed ring forms a rack and is respectively connected to a plurality of control gears through teeth. A driving motor is provided on the mounting base. A driving gear is provided at the output end of the driving motor. The driving gear is connected to the toothed ring and is used to drive the toothed ring to rotate.

[0011] As a further improvement of the present utility model, a limiting ring is provided on one side of the toothed ring. A limiting groove is provided in the control cavity. The limiting ring is slidably connected to the limiting groove to limit the toothed ring to rotate only around the axis of the through passage.

[0012] As a further improvement of the present utility model, a reflecting surface is formed on the lower end surface of the blade.

[0013] As a further improvement of the present utility model, the reflecting unit includes an annular lens and a plane lens. The upper end of the annular lens abuts and fits against the edge of the plane lens.

[0014] As a further improvement of the present utility model, a focusing component is provided in the light beam passage. The focusing component respectively includes a filter lens and a focusing lens. The filter lens and the focusing lens are arranged in sequence from the reflection space to the induction space direction.

[0015] Advantages of the present utility model:

[0016] 1. By providing a control module at the control end to adjust the size of the through passage, the dispersion of the light beam in the laser head is reduced, so that the light beam is more concentrated in the through channel, thereby improving the detection accuracy;

[0017] 2. By using the driving mechanism to simultaneously adjust a plurality of blades, a larger adjustment range can be obtained, and at the same time, the overall structure is more compact, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall installation schematic diagram of the present utility model;

[0019] Figure 2 is the overall installation sectional schematic diagram of the present utility model;

[0020] Figure 3Schematic diagram of the installation of the control module of the present utility model;

[0021] Figure 4 Schematic diagram of the installation of the limit ring of the present utility model;

[0022] Figure 5 Schematic diagram of the limit groove of the present utility model.

[0023] Reference numerals: 1, mounting seat; 2, induction space; 3, reflection space; 4, through passage; 5, control end; 6, reflection unit; 7, light beam passage; 8, control module; 9, drive mechanism; 10, blade; 11, induction unit; 12, control cavity; 13, storage cavity; 14, rotating rod; 15, toothed ring; 16, control gear; 17, drive motor; 18, drive gear; 19, limit ring; 20, limit groove; 21, reflection surface; 22, annular lens; 23, plane lens; 24, focusing component; 25, filter lens; 26, focusing lens. Detailed implementation manners

[0024] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The same components are denoted by the same reference numerals.

[0025] As Figures 1-5 shown, a laser processing perforation detection mechanism includes a mounting seat 1. An induction space 2 and a reflection space 3 arranged left and right are provided in the mounting seat 1. A through passage 4 is formed on the reflection space 3. A control end 5 is formed at the upper end of the through passage 4. A reflection unit 6 is provided in the through passage 4. A light beam passage 7 is formed between the induction space 2 and the reflection space 3. The reflection unit 6 is used to reflect the light beam and enter the induction space 2 along the light beam passage 7.

[0026] Preferably, it further includes a control module 8. The control module 8 includes a drive mechanism 9 and a plurality of blades 10. The plurality of blades 10 are circumferentially arranged along the axis of the through passage 4. The drive mechanism 9 is connected to the plurality of blades 10 and drives the plurality of blades 10 to move simultaneously to control the size of the range covering the control end 5, that is, to adjust the size of the control end 5.

[0027] Preferably, it further includes an induction unit 11. The induction unit 11 is located in the induction space 2. The induction unit 11 is used to receive and detect the light beam intensity.

[0028] During use, the mounting base 1 is installed inside the laser head, and the axis of the through passage 4 is aligned with the axis of the laser beam, so that the laser beam passes through the through passage 4. Further, the positions of the multiple vanes 10 are adjusted by the driving mechanism 9, so that the vanes 10 circumferentially cover the through passage 4, thereby reducing the size of the control end 5, making the size of the control end 5 slightly larger than the size of the laser beam. At this time, the laser beam is reflected by the workpiece surface, and the light is reflected along the nozzle into the laser head. Due to the coverage of the control end 5 by the vanes 10, the light can be concentrated in the through passage 4 as much as possible, and then the light is reflected along the light beam passage 7 into the induction space 2 by the reflection unit 6 in the through passage 4, and is detected by aligning with the induction unit 11, and after detection, an electrical signal is transmitted to the terminal.

[0029] Since the refracted light of the laser will have a great influence after penetrating the workpiece, at this time, the intensity of the light entering the laser head will be greatly reduced. Then, the induction unit 11 can be aligned for detection, and the recognition and judgment are completed through the terminal to achieve the perforation detection effect.

[0030] In this embodiment, the induction unit 11 is specifically a photosensitive sensor.

[0031] Preferably, a control cavity 12 and a storage cavity 13 are arranged up and down in the mounting base 1. The multiple vanes 10 are all located in the storage cavity 13. One end of the vane 10 is provided with a rotating rod 14 and is rotatably connected to the storage cavity 13 through the rotating rod 14. One end of the rotating rod 14 passes through the storage cavity 13 and is located in the control cavity 12. The driving mechanism 9 is located in the control cavity 12 and is simultaneously connected to one end of the multiple rotating rods 14. The driving mechanism 9 is used to drive the multiple rotating rods 14 to rotate in the same direction.

[0032] The arrangement of the control cavity 12 and the storage cavity 13 can facilitate the installation of the vanes 10. At the same time, the rotational connection through the rotating rod 14 can facilitate the simultaneous driving of the multiple rotating rods 14 by the driving mechanism 9 for convenient operation.

[0033] Preferably, the driving mechanism 9 includes a toothed ring 15. The toothed ring 15 is rotatably connected to the control cavity 12. One end of the rotating rod 14 is provided with a control gear 16 corresponding to the inside of the control cavity 12. The inner side of the toothed ring 15 forms a rack and is respectively connected to and tooth-connected to the multiple control gears 16. A driving motor 17 is provided on the mounting base 1. The output end of the driving motor 17 is provided with a driving gear 18. The driving gear 18 is connected to the toothed ring 15 and is used to drive the toothed ring 15 to rotate.

[0034] During use, the driving motor 17 rotates, and then drives the toothed ring 15 to rotate through the driving gear 18. Due to the tooth connection between the control gear 16 and the rack, the simultaneous driving of the multiple control gears 16 is realized.

[0035] In this embodiment, the plurality of blades 10 may contact each other to close the control end 5, thereby achieving a sealing effect on the inside of the laser head in an unprocessed state.

[0036] Preferably, a limiting ring 19 is provided on one side of the gear ring 15, and a limiting groove 20 is provided in the control cavity 12. The limiting ring 19 is slidably connected to the limiting groove 20 to limit the gear ring 15 to rotate only around the axis of the through passage 4.

[0037] The limiting method of the limiting ring 19 and the limiting groove 20 can achieve the limiting effect and make the overall structure simpler.

[0038] Preferably, a reflective surface 21 is formed on the lower end surface of the blade 10 .

[0039] The provision of the reflective surface 21 can improve the refraction effect of light, thereby increasing the light intensity corresponding to the light beam passage 7, thereby improving the detection accuracy.

[0040] Preferably, the reflection unit 6 includes an annular lens 22 and a plane lens 23 , and the upper end of the annular lens 22 and the edge of the plane lens 23 are in contact with each other. More specifically, the annular lens 22 is provided with a hole corresponding to the light beam passage 7 .

[0041] The annular lens 22 and the flat lens 23 are arranged to realize reflection while reducing the difficulty of processing, thereby reducing the use cost.

[0042] Preferably, a focusing component 24 is provided in the light beam passage 7 , and the focusing component 24 includes a filter 25 and a focusing lens 26 , respectively. The filter 25 and the focusing lens 26 are arranged in sequence from the reflection space 3 to the sensing space 2 .

[0043] The filter 25 can filter the light to improve the detection accuracy. The focusing lens 26 can further increase the light intensity and gather the light, thereby transmitting the gathered light to the sensing unit 11 to improve the detection accuracy of the sensing unit 11.

[0044] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A laser processing perforation detection mechanism, characterized in that: It includes a mounting base (1), and an induction space (2) and a reflection space (3) arranged horizontally are provided in the mounting base (1). A through passage (4) is formed on the reflection space (3), a control end (5) is formed at the upper end of the through passage (4), a reflection unit (6) is provided in the through passage (4), and a light beam passage (7) is formed between the induction space (2) and the reflection space (3). The reflection unit (6) is used to reflect the light beam and enter the induction space (2) along the light beam passage (7); A control module (8), the control module (8) includes a driving mechanism (9) and a plurality of blades (10). The plurality of blades (10) are circumferentially arranged along the axis of the through passage (4). The driving mechanism (9) is connected to the plurality of blades (10) and drives the plurality of blades (10) to move simultaneously to control the size of the range where the plurality of blades (10) cover the control end (5); An induction unit (11), the induction unit (11) is located in the induction space (2), and the induction unit (11) is used to receive and detect the light beam intensity.

2. The laser processing perforation detection mechanism according to claim 1, wherein: A control cavity (12) and a storage cavity (13) are provided vertically in the mounting base (1). The plurality of blades (10) are all located in the storage cavity (13). One end of the blade (10) is provided with a rotating rod (14) and is rotatably connected to the storage cavity (13) through the rotating rod (14). One end of the rotating rod (14) passes through the storage cavity (13) and is located in the control cavity (12). The driving mechanism (9) is located in the control cavity (12) and is simultaneously connected to one end of the plurality of rotating rods (14). The driving mechanism (9) is used to drive the plurality of rotating rods (14) to rotate in the same direction.

3. The laser processing and perforation detection mechanism according to claim 2, wherein: The driving mechanism (9) includes a toothed ring (15). The toothed ring (15) is rotatably connected to the control cavity (12). A control gear (16) is provided at one end of the rotating rod (14) corresponding to the control cavity (12). The inner side of the toothed ring (15) forms a rack and is respectively connected to a plurality of control gears (16) through teeth. A driving motor (17) is provided on the mounting base (1). A driving gear (18) is provided at the output end of the driving motor (17). The driving gear (18) is connected to the toothed ring (15) and is used to drive the toothed ring (15) to rotate.

4. A laser processing perforation detection mechanism according to claim 3, characterized in that: A limiting ring (19) is provided on one side of the toothed ring (15), and a limiting groove (20) is provided in the control cavity (12). The limiting ring (19) is slidably connected to the limiting groove (20) to limit the toothed ring (15) to rotate only around the axis of the through passage (4).

5. A laser processing perforation detection mechanism according to any one of claims 1-4, characterized in that: A reflecting surface (21) is formed on the lower end surface of the blade (10).

6. The laser processing perforation detection mechanism according to claim 1, wherein: The reflection unit (6) includes an annular lens (22) and a plane lens (23). The upper end of the annular lens (22) is in contact and fits with the edge of the plane lens (23).

7. A laser processing perforation detection mechanism according to claim 1, characterized in that: A focusing component (24) is provided in the light beam passage (7). The focusing component (24) respectively includes a filter lens (25) and a focusing lens (26). The filter lens (25) and the focusing lens (26) are arranged in sequence from the reflection space (3) to the induction space (2).

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