Device for automatically replacing laser head and cleaning protective glass

Abstract

The utility model relates to the technical field of laser cutting equipment, and provides a laser head automatic replacement and protective glass cleaning device which comprises an upper box body, a lower box body, a protective glass set automatic replacement assembly and a protective glass cleaning device. The upper box body is provided with an upper material bin, the upper material bin is used for containing a clean protective lens group, the lower box body is provided with a lower material bin, the lower material bin is used for containing a polluted protective lens group, the protective lens group automatic replacement assembly comprises a rotating disc arranged in a space defined by the upper box body and the lower box body and a motor arranged on the upper box body, and the motor drives the rotating disc to rotate. Therefore, the mirror grooves in the rotating disc are driven to move between the feeding position and the discharging position, and replacement of the protective mirror set is achieved. The protective glass cleaning device comprises an air inlet valve and an exhaust valve, clean air is blown into the air inlet valve to take away dirt on the surface of the protective glass set and is exhausted from the exhaust valve, and therefore the protective glass set is cleaned. According to the invention, automatic replacement and cleaning functions of the protection lens group are realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser cutting equipment, and particularly relates to a laser head automatic replacement and cleaning protective mirror device. BACKGROUND

[0002] The laser processing head is provided with a protective mirror, which can protect the internal light path of the laser processing head and core components such as valuable collimating and focusing mirrors. The protective mirror of the laser head is a consumable part that is easily damaged and needs to be maintained and cleaned or replaced in time. Otherwise, the laser head mirror may burst, and the entire laser head may be damaged in severe cases.

[0003] Most of the existing traditional laser heads are provided with a protective mirror in a drawer type structure, which is manually extracted for maintenance or replacement by opening the cover plate. The manual replacement of the protective mirror has a complex operation process, and frequent opening of the protective mirror cover plate causes the internal mirror groove of the laser head to be open to the outside, so that dust and the like from the outside can easily enter the laser head and contaminate the internal core components. CONTENT OF THE INVENTION

[0004] The application aims to provide a laser head automatic replacement and cleaning protective mirror device, which can automatically replace the protective mirror group through a rotating disc, and can also clean the slightly contaminated protective mirror group, thereby increasing the use time of the protective mirror group.

[0005] The laser head automatic replacement and cleaning protective mirror device provided by the application comprises an upper box body, a lower box body and a protective mirror group automatic replacement assembly. The upper box body is provided with an upper feeding bin for accommodating clean protective mirror groups. The lower box body is provided with a lower feeding bin for accommodating contaminated protective mirror groups. The protective mirror group automatic replacement assembly comprises a rotating disc arranged in the space defined by the upper box body and the lower box body, and a motor arranged on the upper box body.

[0006] The upper feeding bin is provided with an upper feeding opening below, and the lower feeding bin is provided with a lower feeding opening at the top.

[0007] The rotating disc is provided with an upper feeding position corresponding to the upper feeding opening, which is used to receive clean protective mirror groups from the upper feeding bin. The rotating disc is provided with a lower feeding position corresponding to the lower feeding opening, which is used to place the replaced protective mirror groups into the lower feeding bin.

[0008] The rotating disc is further provided with a mirror groove for placing the protective mirror groups. The motor drives the rotating disc to rotate, thereby driving the mirror groove on the rotating disc to move between the upper feeding position and the lower feeding position, so as to realize the replacement of the protective mirror groups.

[0009] In some embodiments, the rotating disc is further provided with a working position. The upper feeding position is arranged at an anticlockwise 120 degrees of the working position, and the lower feeding position is arranged at a clockwise 120 degrees of the working position.

[0010] In some embodiments, three mirror grooves are arranged on the rotating disc, and the three mirror grooves are spaced 120 degrees apart.

[0011] In some embodiments, the cleaning protective mirror device further comprises an air pipe interface and a one-way valve. Clean air is blown from the air pipe interface to remove dirt on the surface of the protective mirror group, and is discharged from the one-way valve, thereby cleaning the protective mirror group.

[0012] In some embodiments, a cleaning position is further arranged on the rotating disc, and the cleaning position is located 60 degrees counterclockwise from the working position. When the protective mirror group is rotated counterclockwise from the working position to the cleaning position, the protective mirror group is cleaned.

[0013] In some embodiments, the cleaning protective mirror device comprises a first cleaning assembly and a second cleaning assembly. The first cleaning assembly comprises a first air pipe interface arranged on the upper surface of the upper box and a first one-way valve arranged on the side surface of the upper box. The second cleaning assembly comprises a second air pipe interface arranged on the lower surface of the lower box and a second one-way valve arranged on the side surface of the lower box.

[0014] In some embodiments, the first cleaning assembly and the second cleaning assembly are symmetrically arranged on the upper box and the lower box.

[0015] In some embodiments, a pollution detection sensor for detecting the pollution degree of the protective mirror group is arranged on the upper box at the working position.

[0016] In some embodiments, the protective mirror group comprises a protective mirror seat, a sealing element, a protective mirror piece, and a lubricating piece. The lubricating piece is arranged in a groove on the upper end of the mirror seat, and the sealing element is arranged on the lower end of the mirror seat. The mounting space of the protective mirror piece is defined by the step on the upper end of the mirror seat and the sealing element. The sealing element and the lubricating piece are made of non-metallic materials.

[0017] The application can achieve the following beneficial effects:

[0018] 1. By arranging the upper hopper, the lower hopper, and the protective mirror group automatic replacement assembly, the function of automatically replacing the protective mirror piece of the laser head is realized.

[0019] 2. By arranging the proximity sensor, the empty upper hopper and the full lower hopper can be detected, prompting the replacement of the protective mirror box.

[0020] 3. By arranging the photoelectric sensor, the contamination of the protective mirror can be detected, prompting the maintenance or replacement of the protective mirror group.

[0021] 4. By arranging the protective mirror cleaning position and the cleaning protective mirror device, clean gas is introduced to clean the slightly contaminated protective mirror group.

[0022] 5. Reduce the number of laser head maintenance, reduce the laser head inside the mirror groove and the length of exposure to the outside world, reduce the probability of contamination inside the laser head. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a kind of laser head automatic replacement and cleaning protective mirror device structure schematic diagram provided by the utility model;

[0024] Figure 2 is a kind of laser head automatic replacement and cleaning protective mirror device internal structure diagram provided by the utility model;

[0025] Figure 3 is Figure 2 sectional view;

[0026] Figure 4 is a kind of laser head automatic replacement and cleaning protective mirror device rotating disc structure schematic diagram provided by the utility model;

[0027] Figure 5 is a kind of laser head automatic replacement and cleaning protective mirror device protective mirror group structure schematic diagram provided by the utility model.

[0028] Reference signs are explained: 1-upper box body, 2-lower box body, 21-rotating disc mounting seat, 3-motor, 4-feeding bin, 5-discharging bin, 6-rotating disc, 61-first mirror groove, 62-second mirror groove, 63-third mirror groove, 64-working position, 65-discharging position, 66-feeding position, 67-cleaning position, 68-motor shaft mounting seat, 7-protective mirror group, 71-lubricating sheet, 72-protective mirror sheet, 73-mirror seat, 74-sealing element, 75-groove, 8-sealing ring, 81-first proximity sensor, 82-second proximity sensor, 83-contamination detection sensor, 91-first air inlet pipe interface, 92-second air inlet pipe interface, 93-first check valve, 94-second check valve, 10-laser head. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is described in detail below in combination with drawings and specific embodiments.It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0031] Unless otherwise defined, 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 application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0032] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to one of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0033] The embodiment provides a laser head automatic replacement and cleaning protective mirror device, which comprises an upper box body 1, a lower box body 2 and a protective mirror group automatic replacement assembly, as shown in the figure. Figures 1-3 The upper box body 1 is provided with an upper bin 4, and the upper bin 4 is installed on the upper box body 1 through a pressing sleeve; clean protective mirror groups 7 are stacked in the upper bin 4, and the lower part of the upper bin 4 is provided with an upper feeding port for removing the clean protective mirror groups 7 from the upper bin 4; the lower box body 2 is provided with a lower bin 5, and the lower bin 5 is installed on the lower box body 2 through a pressing sleeve; the contaminated protective mirror groups 7 are stacked in the lower bin 5 after being replaced, and the upper part of the lower bin 5 is provided with a lower feeding port for placing the replaced protective mirror groups 7 in the lower bin 5.

[0034] The protective mirror group automatic replacement assembly comprises a rotating disc 6 arranged in the space defined by the upper box body 1 and the lower box body 2, and a motor 3 arranged on the upper box body 1, and a sealing ring 8 is further arranged between the upper box body and the lower box body. The rotating disc 6 is arranged on a rotating disc mounting seat 21 of the lower box body 2, and the output shaft of the motor 3 is connected with a motor shaft mounting seat 68 on the rotating disc, so that the rotating disc 6 can be driven to rotate by the motor 3. In some embodiments, a speed reduction gear is further arranged between the output shaft of the motor 3 and the motor shaft mounting seat 68. The rotating disc 6 is provided with mirror grooves for placing the protective mirror groups 7, including a first mirror groove 61, a second mirror groove 62 and a third mirror groove 63, and the three mirror grooves are spaced 120 degrees apart, as shown in the figure. Figure 4

[0035] An upper feeding position 66 is arranged on the rotating disc 6 corresponding to the upper feeding port, so that when the motor 3 drives the mirror groove to the upper feeding position 66, the protective mirror groups 7 in the upper bin 4 can directly fall into the mirror groove in the rotating disc 6 by gravity. The upper feeding position 66 is used for placing the clean protective mirror groups 7 in the upper bin 4, and a lower feeding position 65 is arranged on the rotating disc 6 corresponding to the lower bin 5, so that when the motor 3 drives the mirror groove to the lower feeding position 65, the contaminated protective mirror groups 7 fall into the lower bin 5 through the lower feeding port. ​

[0036] The upper box 1 is further provided with a laser head 10, and the rotating disc 6 is further provided with a working position 64, which is arranged below the laser head 10, an upper feeding position 66 is arranged at 120 degrees counterclockwise of the working position 64, and a lower feeding position 65 is arranged at 120 degrees clockwise of the working position 64. The rotating disc 6 rotates 120 degrees clockwise from the upper feeding position 66 to the working position 64 after receiving the clean protective lens group 7, and the laser processing operation is performed at the working position 64. When the protective lens group 7 is contaminated to a certain degree, the lens groove at the working position 64 is rotated 120 degrees clockwise, and the contaminated protective lens group 7 falls into the lower feeding bin 5 from the lower feeding position 65. Only the motor 3 drives the rotating disc 6 to rotate, and the three lens grooves on the rotating disc 6 are automatically controlled to move between the upper feeding position 66 and the lower feeding position 65 in turn, so that the automatic replacement of the protective lens group 7 can be completed.

[0037] Specifically, since the working position 64, the upper feeding position 66 and the lower feeding position 65 are 120 degrees apart, and the three lens grooves are also 120 degrees apart, when the first lens groove 61 is located at the working position 64, the corresponding second lens groove 62 is located at the lower feeding position 65 above the lower feeding bin 5, and the third lens groove 63 is located at the upper feeding position 66 below the upper feeding bin 4. That is, the first lens groove 61 contains the protective lens group 7 being worked, the second lens groove 62 is in an empty state, and the third lens groove 63 contains the clean protective lens group 7 to be used. When replacing, the clean protective lens group 7 has already fallen into the third lens groove 63 due to gravity, and only the rotating disc 6 needs to be rotated 120 degrees clockwise to complete the replacement of the protective lens. When the protective lens group is replaced, the rotating stroke of the rotating disc is fixed, which greatly improves the replacement speed and accuracy of the protective lens.

[0038] In some embodiments, a first proximity sensor 81 is arranged at the bottom of the upper feeding bin 4, and a second proximity sensor 82 is arranged at the top of the lower feeding bin 5. When the last protective lens group 7 in the upper feeding bin 4 falls into the lens groove of the rotating disc 6, the first proximity sensor 81 sends a signal that the upper feeding bin 4 is empty, prompting to replace the upper feeding bin 4. When the second proximity sensor 82 detects that the lower feeding bin 5 is full, it prompts to replace the upper feeding bin 4.

[0039] In this application, the protective lens group 7 includes a protective lens seat 73, a sealing element 74, a protective lens 72, and a lubricating sheet 71, as shown in the figure. Figure 5 The protective lens 72 is arranged in the lens seat 73, the mounting space of the protective lens 72 is defined by the step at the upper end of the lens seat 73 and the sealing element 74 arranged at the lower end of the lens seat 73, the lubricating sheet 71 is arranged in the groove at the upper end of the lens seat 73, and the upper surface of the lubricating sheet 71 is higher than the upper surface of the lens seat 73. And the sealing element 74 and the lubricating sheet 71 are made of non-metallic materials, such as PTFE, with smooth surfaces. The surface of the parts in contact with the lubricating sheet 71 and the sealing element 74 is also a smooth surface, and there will be no foreign matter rubbing off when in contact, thereby avoiding contamination of the protective lens when the rotating disc 6 rotates.

[0040] In some embodiments, the cleaning protection mirror device further comprises an air pipe interface and a one-way valve, blowing clean air from the air pipe interface to carry away dirt on the surface of the protection mirror group 7, and discharging from the one-way valve, thereby cleaning the protection mirror group 7.

[0041] Further, the cleaning protection mirror device comprises a first cleaning assembly and a second cleaning assembly, which are symmetrically arranged on the upper box 1 and the lower box 2. The first cleaning assembly comprises a first air inlet pipe interface 91 arranged on the upper surface of the upper box 1, and a first one-way valve 93 arranged on the side surface of the upper box 1. The second cleaning assembly comprises a second air inlet pipe interface 92 arranged on the lower surface of the lower box 2, and a second one-way valve 94 arranged on the side surface of the lower box 2. Through the symmetric first cleaning assembly and the second cleaning assembly, the two surfaces of the protection mirror group 7 can be cleaned at the same time, thereby improving the cleaning efficiency of the protection mirror group 7.

[0042] Correspondingly, the rotating disc 6 is further provided with a cleaning position 67, which is arranged at 60 degrees counterclockwise from the working position 64. When the protection mirror group 7 at the working position 64 is rotated counterclockwise to the cleaning position 67, the protection mirror group 7 can be cleaned.

[0043] Further, the cleaning protection mirror device further comprises a pollution monitoring sensor, such as Figure 3 As shown in the figure, the pollution detection sensor 83 is an optical sensor, preferably a photodiode sensor, which is used to detect the degree of pollution of the protection mirror group 7.

[0044] When the protection mirror group 7 is polluted, the diffuse light entering the photodiode sensor will increase, and the current value of the photodiode sensor will also increase. The operator can determine the degree of pollution of the protection mirror group 7 according to the value fed back by the photodiode sensor. When the value exceeds the first threshold value, the system receives an alarm signal to stop and prompts to clean or replace the protection mirror group 7. When the operator confirms to clean the protection mirror group 7 on the system, the motor 3 drives the rotating disc 6 to rotate counterclockwise by 60 degrees. The protection mirror group 7 at the working position 64 enters the cleaning position 67, and the system controls the valve to introduce clean gas such as clean air, nitrogen or other cutting auxiliary gas into the first air inlet pipe joint and the second air inlet pipe joint at about 5 bar. After the gas enters, it will blow and clean the protection mirror group 7. Then the gas mixed with the pollutants on the protection mirror group 7 is discharged from the first one-way valve 93 and the second one-way valve 94 respectively. The cleaning gas pressure and cleaning time can be set on the system. After the cleaning is completed, the motor 3 drives the rotating disc 6 to rotate clockwise by 60 degrees to return to the working position 64. When the value fed back by the photodiode sensor exceeds the second threshold value, an alarm signal is sent to replace the protection mirror group 7, and the protection mirror group 7 is replaced. The first threshold value and the second threshold value are the output current values of the photodiode sensor, and the second threshold value is greater than the first threshold value.

[0045] By setting the rotating disc and the cleaning protection mirror device in the internal space of the upper box body and the lower box body, the number of laser head maintenance is reduced, the exposure time of the internal mirror groove of the laser head to the outside is reduced, the probability of contamination of the laser head is reduced, and the use time of the protection mirror group is prolonged.

[0046] The above describes the embodiments of the application in detail, and the principles and implementation manners of the application are described by applying specific examples.

[0047] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims. In addition, the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. The plurality of units or devices stated in the system claims can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, not any specific order.

[0048] Meanwhile, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application range, and in view of the above, the content of the present description should not be understood as limiting the present application.

Claims

1. A device for automatic replacement and cleaning of protective mirrors of a laser head, comprising an upper box, a lower box and an automatic replacement assembly of protective mirror groups; characterized in that, The upper box is provided with an upper feeding bin for accommodating clean protective lens sets, and the lower box is provided with a lower feeding bin for accommodating contaminated protective lens sets; the protective lens set automatic replacement assembly comprises a rotating disc arranged in a space defined by the upper box and the lower box, and a motor arranged on the upper box; A feeding opening is arranged below the upper feeding bin, and a discharging opening is arranged at the top end of the lower feeding bin; An upper feeding position is arranged on the rotating disc corresponding to the feeding opening, and is used for receiving a clean protective lens set from the upper feeding bin; a lower discharging position is arranged on the rotating disc corresponding to the discharging opening, and is used for placing a replaced protective lens set into the lower feeding bin; The rotating disc is further provided with a lens groove for placing a protective lens set, and the motor drives the rotating disc to rotate, so as to drive the lens groove on the rotating disc to move between the upper feeding position and the lower discharging position, thereby realizing replacement of the protective lens set.

2. The laser head automatic replacement and protective mirror cleaning device according to claim 1, characterized in that, The rotating disc is further provided with a working position, the upper feeding position is arranged at an anti-clockwise 120-degree position of the working position, and the lower discharging position is arranged at a clockwise 120-degree position of the working position.

3. The laser head automatic replacement and protective mirror cleaning device according to claim 2, characterized in that, The rotating disc is provided with three lens grooves, and the three lens grooves are spaced apart by 120 degrees.

4. The laser head automatic replacement and protective mirror cleaning device as claimed in claim 2, wherein, The cleaning protective lens device comprises an air pipe interface and a one-way valve, clean air is blown into the air pipe interface to carry away dirt on the surface of the protective lens set, and the clean air is discharged from the one-way valve, so as to clean the protective lens set.

5. The laser head automatic replacement and protective mirror cleaning device as claimed in claim 4, wherein, The rotating disc is further provided with a cleaning position, and the cleaning position is located at an anti-clockwise 60-degree position of the working position, so that the protective lens set at the working position is cleaned when the protective lens set is rotated anti-clockwise to the cleaning position.

6. The laser head automatic replacement and protective mirror cleaning device as claimed in claim 4, wherein, The cleaning protective lens device comprises a first cleaning assembly and a second cleaning assembly, the first cleaning assembly comprises a first air inlet pipe interface arranged on the upper surface of the upper box, and a first one-way valve arranged on the side surface of the upper box, and the second cleaning assembly comprises a second air inlet pipe interface arranged on the lower surface of the lower box, and a second one-way valve arranged on the side surface of the lower box.

7. The laser head automatic replacement and protective mirror cleaning device according to claim 6, wherein, The first cleaning assembly and the second cleaning assembly are symmetrically arranged on the upper box and the lower box.

8. The laser head automatic replacement and protective mirror cleaning device as claimed in claim 2, wherein, A contamination detection sensor for detecting the contamination degree of the protective lens set is arranged on the upper box at the working position.

9. The laser head automatic replacement and protective mirror cleaning device as claimed in claim 1, wherein, A first proximity sensor is arranged at the bottom of the upper feeding bin, and a second proximity sensor is arranged at the top of the lower feeding bin.

10. The laser head automatic replacement and protective mirror cleaning device as claimed in claim 1, wherein, The protective lens set comprises a protective lens seat, a sealing element, a protective lens, and a lubricating sheet, the lubricating sheet is arranged in a groove at the upper end of the lens seat, the sealing element is arranged at the lower end of the lens seat, and the mounting space of the protective lens is defined by the step at the upper end of the lens seat and the sealing element, wherein the sealing element and the lubricating sheet are made of non-metallic materials.

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