A multi-point laser marking auxiliary focusing device and method

Abstract

This invention relates to a multi-point laser marking auxiliary focusing device, comprising a control system; an X-axis galvanometer motor connected to an X-axis reflector; and a Y-axis galvanometer motor connected to a Y-axis reflector. When the indicator light source is lit, two non-overlapping light points are formed on the marking plane. At this time, by rotating the YX-axis galvanometer motor, any one of the indicator light points can be positioned at any position within the effective range of the marking plane. By alternately lighting the two indicator light sources and coordinating with the rotation of the galvanometer motor, and through periodic alternating positioning, the two sets of indicator light sources can be lit, enabling the two indicator light points to overlap at any point in the effective area of ​​the marking plane. When the distance between the marking plane and the galvanometer changes, the light points will separate, thereby guiding the operator to adjust the distance between the galvanometer and the marking plane to make them overlap again, completing the auxiliary focusing operation.

Description

Technical Field

[0001] This invention relates to the field of laser marking technology, specifically to a multi-point laser marking auxiliary focusing device and method. Background Technology

[0002] Existing laser marking machines typically employ the scheme described in patent number CN208953787U to achieve auxiliary focusing. This involves installing a pair of adjustable-angle red light indicators at different positions on the galvanometer. The two red light beams are then adjusted to intersect and coincide at a specific point on the marking plane. When the focal length of the marking plane changes, the indicator points separate into two red dots. The operator can adjust the height of the excitation lens to re-align the two points, thereby adjusting the relative distance between the marking plane and the galvanometer to the set distance, thus achieving the auxiliary focusing indication function. Figure 2 As shown.

[0003] This method can only achieve laser focusing assistance at a pre-set fixed point. When the marking position changes or the set point is not a reference point, the method will fail. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-point laser marking auxiliary focusing device and method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-point laser marking auxiliary focusing device includes a control system; an X-axis galvanometer motor connected to an X-axis reflector; a Y-axis galvanometer motor connected to a Y-axis reflector; a field lens positioned to match the X-axis and Y-axis reflectors; a first indicator light source and a second indicator light source disposed on one side of the X-axis and Y-axis reflectors; a marking plane on which the first indicator light source displays a first indicator light spot and the second indicator light source displays a second indicator light spot; and a laser beam disposed on the same side of the X-axis and Y-axis reflectors.

[0006] Optionally, the first indicator light source and the second indicator light source form an angle.

[0007] A multi-point laser marking-assisted focusing method includes the following steps:

[0008] Step 1: The X-axis galvanometer motor is positioned at coordinate X1, and the Y-axis galvanometer motor is positioned at coordinate Y1. Then the first indicator light source is turned on. At this time, the coordinates of the first indicator light spot are X1', Y1'. After being lit for a period of time, the first indicator light source is turned off.

[0009] Step 2: The X-axis galvanometer motor is positioned at the X2 coordinate, the Y-axis galvanometer motor is positioned at the Y2 coordinate, and then the second indicator light source is started and lit. At this time, the coordinates of the second indicator light spot are X2', Y2'. After being lit for a period of time, the second indicator light source is turned off.

[0010] Step 3: Alternately execute steps 1 and 2. When the frequency is high enough, two continuously and synchronously lit first and second indicator points will be seen on the marking plane.

[0011] Step 4: Adjust the set X1, Y1 and X2, Y2 coordinate values. This will position the first indicator light point coordinates X1', Y1' and the second indicator light point coordinates X2', Y2' at any point within the effective range of the marking plane, and make them coincide. Since the light paths of the first and second indicator light sources do not coincide, when the distance between the marking plane and the galvanometer changes, the two originally coincident light points will separate into two independent light points. This guides the operator to adjust the distance between the marking plane and the galvanometer so that the two points re-coincide, achieving the purpose of guiding focus.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This invention relates to a multi-point laser marking auxiliary focusing device and method. It employs two staggered point indicator light sources, positioned at a certain angle on the laser incident side. When the indicator light sources are illuminated, two non-overlapping light points are formed on the marking plane. By rotating the YX-axis galvanometer motor, either indicator light point can be positioned at any point within the effective range of the marking plane. By alternately illuminating the two indicator light sources and coordinating with the rotation of the galvanometer motor, the two sets of indicator light sources can be periodically and alternately positioned, allowing the two indicator light points to overlap at any point within the effective area of ​​the marking plane. When the distance between the marking plane and the galvanometer changes, the light points separate, guiding the operator to adjust the distance between the galvanometer and the marking plane to re-overlap, thus completing the auxiliary focusing operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the prior art in this background section;

[0016] Figure 3 This is a schematic diagram showing the position of the beam combiner of the present invention. Detailed Implementation

[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0018] like Figure 1 , Figure 3 As shown, a multi-point laser marking auxiliary focusing device includes a control system; an X-axis galvanometer motor 100 connected to an X-axis reflector 200; a Y-axis galvanometer motor 300 connected to a Y-axis reflector 400; a field lens 500 positioned to cooperate with the X-axis reflector 200 and the Y-axis reflector 400; a first indicator light source 600 and a second indicator light source 700 disposed on one side of the X-axis reflector 200 and the Y-axis reflector 400; a marking plane 800 on which the first indicator light source 600 displays a first indicator light spot 900 and the second indicator light source 700 displays a second indicator light spot 901; and a laser beam 902 disposed on the same side of the X-axis reflector 200 and the Y-axis reflector 400.

[0019] The first indicator light source 600 and the second indicator light source 700 form an angle. The angle between the first indicator light source 600 and the second indicator light source 700 needs to be reasonably designed based on the distance from the indicator light source to the X-axis reflector 200 and the bearing area of ​​the X-axis reflector 200 and the Y-axis reflector 400.

[0020] A multi-point laser marking-assisted focusing method includes the following steps:

[0021] Step 1: The X-axis galvanometer motor 100 is positioned at the X1 coordinate, the Y-axis galvanometer motor 300 is positioned at the Y1 coordinate, and then the first indicator light source 600 is started and lit. At this time, the coordinates of the first indicator light spot 900 are X1', Y1'. After being lit for a period of time, the first indicator light source 600 is turned off.

[0022] Step 2: X-axis galvanometer motor 100 positions the X2 coordinate, Y-axis galvanometer motor 300 positions the Y2 coordinate, and then the second indicator light source 700 is started and lit. At this time, the second indicator light point 901 is lit at the coordinates X2', Y2'. After being lit for a period of time, the second indicator light source 700 is turned off.

[0023] Step 3: Alternately execute steps 1 and 2. When the frequency is sufficient, two continuously and synchronously lit first indicator light spot 900 and second indicator light spot 901 are obtained on the marking plane 800.

[0024] Step 4: Adjust the set X1, Y1 and X2, Y2 coordinate values. This will position the coordinates X1', Y1' of the first indicator light point 900 and the coordinates X2', Y2' of the second indicator light point 901 at any point within the effective range of the marking plane, and make them coincide. Since the light paths of the first indicator light source 600 and the second indicator light source 700 do not coincide, when the distance between the marking plane 800 and the galvanometer changes, the two originally coincident points will separate into two independent points. This guides the operator to adjust the moment between the marking plane 800 and the galvanometer so that the two points re-coincide, achieving the focusing purpose.

[0025] By setting the control system program, when multiple products are marked on a single marking machine, a focus reference point can be set for each product at different positions without adjusting any hardware. Furthermore, it can correspond one-to-one with the program template of the marked product, so that for any product, when the marking template is opened, the corresponding focus indicator light point will be automatically matched and output, guiding the operator to quickly adjust the marking focus.

[0026] In addition to assisting the marking machine in focusing, it can also guide the marking product for clamping and positioning. For example, by pointing the dual red lights at two fixed reference points of the marking product, when the product needs to be marked, you only need to align the two reference points of the product with the light spot of the indicator light in turn to complete the calibration of the workpiece marking position.

[0027] Meanwhile, the present invention also achieves the same effect by setting a beam combiner 903 at the coaxial position of the laser beam 902 and reflecting the second indicator light source 700 onto the optical path coaxial with the laser.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A multi-point laser marking assisted focusing method, characterized in that, The utility model relates to a kind of laser marking machine, including control system; X axis galvanometer motor (100), the X axis galvanometer motor (100) is connected with X axis mirror (200); Y axis galvanometer motor (300), the Y axis galvanometer motor (300) is connected with Y axis mirror (400); Field lens (500), the field lens (500) is matched with the position of X axis mirror (200) and Y axis mirror (400); First indicating light source (600) and second indicating light source (700), the first indicating light source (600) and second indicating light source (700) are arranged in the side of X axis mirror (200) and Y axis mirror (400); Marking plane (800), the first indicating light source (600) shows first indicating light spot (900) on the marking plane (800), and the second indicating light source (700) shows second indicating light spot (901) on the marking plane (800); Laser beam (902), the laser beam (902) is arranged in the same side of the X axis mirror (200) and Y axis mirror (400), and the first indicating light source (600) and second indicating light source (700) form an included angle; When working, the following control steps are included: Step 1: the X axis galvanometer motor (100) is positioned to X1 coordinate, the Y axis galvanometer motor (300) is positioned to Y1 coordinate, then the first indicating light source (600) starts to light up, at this time the first indicating light spot (900) bright coordinate is X1 ', Y1 ', then the first indicating light source (600) is extinguished; Step 2: the X axis galvanometer motor (100) is positioned to X2 coordinate, the Y axis galvanometer motor (300) is positioned to Y2 coordinate, then the second indicating light source (700) starts to light up, at this time the second indicating light spot (901) light coordinate is X2 ', Y2 ', then the second indicating light source (700) is extinguished; Step 3: alternately execute step 1 and 2, two first indicating light spots (900) and second indicating light spots (901) that are continuously and synchronously lit are seen on the marking plane (800); Step 4: adjust the set X1, Y1 and X2, Y2 coordinate values, that is, the first indicating light spot (900) X1 ', Y1'and the second indicating light spot (901) coordinate X2 ', Y2'can be positioned in any point in the effective range of marking plane, and make it coincide, since the light path of the first indicating light source (600) and the second indicating light source (700) does not coincide, when the distance between the marking plane (800) and the galvanometer changes, the two originally coincident points are separated into two independent points, guide operator to adjust the distance between the marking plane (800) and the galvanometer, so that the two points complete coincidence again, that is, the purpose of guiding focusing can be achieved.

Images