Laser head zero focus detection device

Abstract

The utility model relates to a laser head zero focus detection device, and belongs to the field of laser head testing. According to the technical scheme, the laser head zero focus detection device comprises a platen, a first linear moving assembly and a second linear moving assembly are arranged on the platen, the moving direction of the first linear moving assembly is perpendicular to the moving direction of the second linear moving assembly, a laser head mounting base is arranged on the first linear moving assembly, and a laser head is arranged on the laser head mounting base. And a light spot analyzer is mounted on the second linear moving assembly. The beneficial effects of the utility model are that according to the scheme, the laser head is detected by the light spot analyzer, the laser head is aligned to the light spot analyzer through the two groups of mutually perpendicular linear moving mechanisms, and then the light spot analyzer detects the size of a light spot projected by the laser head, so that the zero focus position of the laser head when the light spot is minimum is obtained; the laser head in the device is simpler and more convenient to install, the test is quick and accurate, actual cutting is not needed, and the power consumption required by the test is lower and safer.

Description

Technical Field

[0001] The utility model relates to the field of laser head testing, in particular to a laser head zero focus detection device. Background Art

[0002] In laser cutting equipment, the optical path system inside the laser head is adjusted by the mirror group, and the control of the mirror group is independent of the control of the axis motion system. Zero focus is the basic reference point for all laser cutting process debugging and is an important factor affecting the performance of the laser head. Zero focus refers to the focus value corresponding to the process parameters when the laser focus is exactly on the surface of the plate during the laser cutting process.

[0003] Due to manual factors and assembly equipment errors during the laser head assembly process, there is a problem of excessive deviation in the zero focus position after the laser head is assembled. In many laser devices, the focus of the process parameters is set to zero focus, and the actual laser focus may not be at the zero position. That is, the same laser connected to different laser heads will get different zero focus positions. After replacing the laser head, repeated debugging is required, which takes a lot of time. Therefore, the laser head is generally tested for zero focus when it is assembled to ensure the position accuracy of its zero focus.

[0004] The current existing zero focus detection method is based on the characteristic that the zero focus position is located on the processing surface. The laser head is installed on the laser equipment, and the test plate is cut. Then, by comparing the size of the slit, the focal length corresponding to the narrowest slit is determined as the zero focus position, which is the technology disclosed in CN213560635U.

[0005] In the above-mentioned existing detection methods, it is still necessary to install the laser head on the cutting equipment and perform the test in the form of simulation or real machine, that is, the installation method of the laser head is still the same as the installation method used in the real machine. The process is relatively complicated and it is necessary to actually cut the test plate, which requires a higher-power laser and the test power consumption is high. Summary of the invention

[0006] The utility model provides a laser head zero focus detection device to solve the problem that the current laser head zero focus test process is complicated.

[0007] In order to solve the above problems, the technical solution adopted by the utility model is a laser head zero focus detection device, including a table, a first linear motion component and a second linear motion component are provided on the table, the moving direction of the first linear motion component and the moving direction of the second linear motion component are perpendicular to each other, the first linear motion component is provided with a laser head mounting seat, and the second linear motion component is installed with a spot analyzer. This solution uses a spot analyzer to detect the laser head, and uses two sets of mutually perpendicular linear motion mechanisms to position the laser head and the spot analyzer directly opposite each other. The spot analyzer then detects the size of the spot projected by the laser head, and then obtains the zero focus position of the laser head when the spot is the smallest. In this device, the laser head is easier to install, the test is fast and accurate, and no actual cutting is required. The power consumption required for the test is lower and safer.

[0008] Preferably, one end of the second linear motion component is located at the midpoint of the stroke of the first linear motion component in the first linear direction.

[0009] Preferably, a reference component is further provided on the second linear motion component, the reference component is located on a side of the spot analyzer close to the first linear motion component, the reference component includes a stopper, a first position sensor is provided on the stopper, the detection direction of the position sensor is vertically upward, and a second position sensor is further provided between the reference component and the spot analyzer. The reference position of the laser head and the spot analyzer is determined by the reference component, and the test is more accurate.

[0010] Preferably, the second linear motion assembly includes a second linear guide rail, and the stopper is slidably mounted on the second linear guide rail; a slide seat is also mounted on the second linear guide rail, and the light spot analyzer is mounted on the slide seat.

[0011] Preferably, the slide is also provided with a lifting device, and the light spot analyzer is installed on the lifting device. The light spot analyzer can move in both horizontal and vertical directions, and is suitable for laser heads of different dimensions.

[0012] Preferably, the second linear motion component also includes a driving rack, and the driving rack is arranged parallel to the second linear guide rail. The slide is also provided with a slide drive motor, and the output shaft of the slide drive motor is provided with a driving gear, and the driving gear is meshed with the driving rack.

[0013] Preferably, the first linear motion assembly comprises a first linear guide rail and a linear drive mechanism, the laser head mounting seat can be slidably mounted on the first linear guide rail, and the driving part of the linear drive mechanism is connected to the laser head mounting seat.

[0014] Preferably, the linear drive mechanism is a chain transmission mechanism, including a driving sprocket and two guide sprockets, the two guide sprockets are respectively located at the two ends of the first linear guide rail, the driving sprocket is located below the table, the driving sprocket and the two guide sprockets are surrounded by a chain, and the laser head mounting seat is connected to the chain link of the chain. The first and second linear motion components are both driven by a rigid structure, and the motion control is more precise.

[0015] Preferably, the first linear guide and chain transmission mechanism are respectively provided with two groups, and the chains in the two groups of chain transmission mechanisms are connected to the laser head mounting seat; a driving motor is also provided on the bottom surface of the table, and the driving sprockets of the two chain transmission mechanisms are installed on the output shaft of the driving motor.

[0016] Preferably, it also includes a test laser source, and the output connector of the test laser source can be connected to the laser head to be tested. The test device has its own laser source, which is more convenient to use independently, and can use low-power laser.

[0017] It can be seen from the above technical scheme that the advantages of the utility model are as follows: this scheme designs a special device for zero-focus detection of the laser head, which can install the laser head more conveniently and quickly, improves the detection efficiency, and uses a spot analyzer to directly receive and analyze the light spot projected by the laser head, without the need to actually cut the sample, thereby improving the detection accuracy, and can use a lower power consumption laser source, reducing the energy consumption of the test process and improving the test safety; in this device, the laser head to be tested and the spot analyzer determine the relative position with a reference point, and the spot analyzer can move in two directions, with more accurate positioning, and can be suitable for lasers of different sizes, and with higher test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0020] Description of Reference Numerals

[0021] 1. Test laser source, 2. Laser head mounting seat, 3. Chain, 4. First linear guide, 5. Second linear guide, 6. Drive motor, 7. Stopper, 8. Slide, 9. Spot analyzer, 10. Table, 11. Laser head. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0023] like Figure 1 As shown, a laser head zero focus detection device includes a table 10. In this embodiment, the table 10 is a table top, and there is a table leg structure below it. The table 10 is provided with a first linear motion component, a second linear motion component and a test laser source 1. The first linear motion component is along the first linear direction, and the second linear motion component is along the second linear direction. The first linear direction and the second linear direction are both horizontal and perpendicular to each other. The first linear motion component and the second linear motion component are arranged in a T shape, that is, one end of the second linear motion component is located at the midpoint of the stroke of the first linear motion component along the first linear direction, and the end is close to the first linear motion component. The first linear motion component is used to install and drive the laser head to move along the first linear direction. The second linear motion component is provided with a spot analyzer 9, and the spot analyzer 9 is used to detect the spot of the laser head.

[0024] Specifically, the first linear motion component includes two groups of first linear guide rails 4 and two corresponding groups of linear drive mechanisms. The two groups of first linear guide rails 4 are parallel to each other. A laser head mounting seat 2 is installed on the first linear guide rail 4. In this embodiment, the linear drive mechanism is a chain transmission mechanism, including a driving sprocket and two guide sprockets. The two guide sprockets are respectively located at the two ends of the first linear guide rail 4. A driving motor 6 is installed on the bottom surface of the table 10. The driving sprockets in the two groups of chain transmission mechanisms are installed on the output shaft of the driving motor. A chain 3 is installed around the driving sprocket and the two guide sprockets. The portion of the chain 3 located between the two guide sprockets forms a straight section, and the chain links of the straight section are connected to the laser head mounting seat 2.

[0025] Alternatively, the straight section of the chain 3 is located on the first linear guide rail 4, the first linear guide rail 4 guides the chain 3 to move straight, and the laser head mounting seat 2 is mounted on the first linear guide rail 4 through the chain 3; or, a specific link on the chain 3 is directly used as the "laser head mounting seat 2".

[0026] The second linear motion assembly includes a second linear guide rail 5 and a driving rack arranged parallel to the second linear guide rail 5. A slide 8 is slidably mounted on the second linear guide rail 5. The slide 8 is provided with a lifting device and a slide drive motor. A driving gear is mounted on the output shaft of the slide drive motor. The driving gear is meshed with the driving rack. In this embodiment, the lifting device is Figure 1The scissor-type structure shown is a prior art and will not be described in detail here. The spot analyzer 9 is installed on the top of the lifting device. A reference assembly is provided on the second linear guide rail 5. The reference assembly includes a stopper 7 that can slide along the second linear guide rail 5, and the stopper 7 can also be fastened to the required position of the second linear guide rail 5 by a structure such as a bolt. A first position sensor is provided on the stopper 7. The detection direction of the first position sensor is vertically upward and is used to detect the position of the laser head. A second position sensor is also provided between the reference assembly and the spot analyzer 9. The second position sensor is used to detect the distance between the stopper 7 and the stopper.

[0027] The method of using this device is:

[0028] First, install the laser head 11 to be tested, and install the laser head 11 on the laser head mounting base 2 through a connecting structure such as a pin, and then connect the test laser source 1 to the input port of the laser head 11; when testing the same batch of laser heads of the same model for the first time, adjust and fix the position of the block 7 on the second linear guide rail so that the first position sensor thereon is located below the laser head nozzle. In subsequent tests, the block position is fixed, and after replacing the laser head to be tested, the drive motor runs by driving the linear drive mechanism. When the laser head is detected to be located above the first position sensor, the drive motor stops, and the positioning of the laser head is completed; then, the slide drive motor drives the slide 8 to move toward the direction of the laser head 11, and when the two are close together, the slide drive motor stops (this step can be performed by the second position sensor When used for the first time, the position of the stopper (7) can be adjusted to make the laser head nozzle close to the spot analyzer (9), and the degree of the second sensor, that is, the distance between the stopper and the slide seat, is recorded. In subsequent tests, the slide seat drive motor stops when this distance is reached. At the same time, when used for the first time, the height of the lifting device is adjusted to make the nozzle of the laser head 11 face the spot analyzer); after the positioning of the laser head and the spot analyzer is completed, the W focusing axis of the laser head is controlled to rotate, and the spot with continuously changing focus is projected on the spot analyzer (9). When the spot size is the smallest, the W axis movement is stopped. At this time, the position reading of the W axis is the zero focus of the laser head. The error between the position degree and the set zero focus of this model is judged. When it exceeds a certain value (such as ±1mm), the laser head is unqualified, and then it is reworked, reassembled and debugged.

[0029] It can be seen from the above technical scheme that the beneficial effect of the utility model is that the scheme designs a special device for zero-focus detection of the laser head, which can install the laser head more conveniently and quickly, improve the detection efficiency, and use the spot analyzer to directly receive and analyze the laser head projected spot without actually cutting the sample. Therefore, the test laser source can use an ordinary low-power red light laser without having an actual cutting effect, thereby greatly reducing the cost of the test laser, reducing the energy consumption of the test process, and improving the test safety. At the same time, the spot size is directly detected to improve the detection accuracy. In this device, the laser head to be tested and the spot analyzer determine the relative position with a reference point, and the spot analyzer can move in two directions, with more accurate positioning, and can be applied to lasers of different sizes, and the test accuracy is higher.

[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser head zero focus detection device, comprising a platform (10), characterized in that: A first linear motion component and a second linear motion component are provided on the platform (10); the moving direction of the first linear motion component and the moving direction of the second linear motion component are perpendicular to each other; a laser head mounting seat (2) is provided on the first linear motion component; and a light spot analyzer (9) is installed on the second linear motion component.

2. The laser head zero focus detection device according to claim 1, characterized in that: One end of the second linear motion component is located at the midpoint of the stroke of the first linear motion component in the first linear direction.

3. The laser head zero focus detection device according to claim 2, characterized in that: A reference component is also provided on the second linear motion component, the reference component is located on a side of the light spot analyzer (9) close to the first linear motion component, the reference component comprises a stopper (7), a first position sensor is provided on the stopper (7), a detection direction of the position sensor is vertically upward, and a second position sensor is also provided between the reference component and the light spot analyzer (9).

4. The laser head zero focus detection device according to claim 3, characterized in that: The second linear motion assembly comprises a second linear guide rail (5), and the stopper (7) is slidably mounted on the second linear guide rail; a slide seat (8) is also mounted on the second linear guide rail (5), and the light spot analyzer (9) is mounted on the slide seat.

5. The laser head zero focus detection device according to claim 4, characterized in that: The slide seat is also provided with a lifting device, and the light spot analyzer is installed on the lifting device.

6. The laser head zero focus detection device according to claim 4, characterized in that: The second linear motion assembly further comprises a driving rack, the driving rack being arranged in parallel with the second linear guide rail, the slide seat (8) is further provided with a slide seat driving motor, the output shaft of the slide seat driving motor is provided with a driving gear, and the driving gear is meshed with the driving rack.

7. The laser head zero focus detection device according to any one of claims 1 to 6, characterized in that: The first linear motion assembly comprises a first linear guide rail (4) and a linear drive mechanism, the laser head mounting seat (2) is slidably mounted on the first linear guide rail (4), and the drive portion of the linear drive mechanism is connected to the laser head mounting seat (2).

8. The laser head zero focus detection device according to claim 7, characterized in that: The linear drive mechanism is a chain transmission mechanism, comprising a drive sprocket and two guide sprockets, the two guide sprockets being located at two end positions of a first linear guide rail (4), the drive sprocket being located below a table (10), a chain (3) being wound around the drive sprocket and the two guide sprockets, and the laser head mounting seat (2) being connected to the chain links of the chain.

9. The laser head zero focus detection device according to claim 8, characterized in that: The first linear guide rail (4) and the chain transmission mechanism are respectively provided with two groups, and the chains in the two groups of chain transmission mechanisms are connected to the laser head mounting seat (2); the bottom surface of the table (10) is also provided with a driving motor (6), and the driving sprockets of the two chain transmission mechanisms are both mounted on the output shaft of the driving motor (6).

10. The laser head zero focus detection device according to any one of claims 1 to 6, characterized in that: It also includes a test laser source (1), the output connector of the test laser source (1) being capable of being connected to a laser head to be tested.

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