Auxiliary focusing device of laser marking machine

Abstract

The utility model relates to the technical field of laser marking machines, in particular to an auxiliary focusing device of a laser marking machine, which comprises a working table, a distance measuring mechanism is arranged on the back of the top of the working table, and when the focal length of a marking device is adjusted by arranging the distance measuring mechanism, the focal length is firstly measured by a laser distance measuring instrument, and then the laser distance measuring instrument is used for measuring the focal length. Adjustment is conducted through an electric telescopic rod, the distance between a marking device on an adjusting frame and an adjusting ring is in a consistent state, so that the machining height of the marking device is adjusted, and when the position of a workpiece starts to be calibrated, an adjusting roller is driven to rotate through rotation of a hinge rod and makes contact with the surface of the workpiece; due to the fact that the distance between the marking device on the adjusting frame and the adjusting ring is in a consistent state, the distance between the marking device and the surface of the workpiece is in a proper marking distance at the moment.

Description

Technical Field

[0001] The utility model relates to the technical field of laser marking machines, in particular to an auxiliary focusing device of a laser marking machine. Background Art

[0002] When a laser marking machine is marking an object, it is necessary to adjust the distance between the laser marking head and the object's marking surface so that the object's marking surface is at the laser's focal point to achieve the best marking effect. For the same laser marking machine, if the focusing lens is not replaced, the focus of its laser beam is relatively fixed. To achieve a good marking effect, when processing workpieces of different thicknesses, it is necessary to adjust the height of the laser marking machine's laser head so that the focus of the laser beam falls on the surface to be marked of the workpiece. Existing laser marking machines generally record the distance between the laser lens and the focal point and determine the focal point by measuring with a ruler. When processing products of different thicknesses, to ensure that the surface to be marked of the workpiece is located on the focal plane, a ruler must be used each time to determine the relative distance between the focusing lens and the surface to be marked of the workpiece, which is very inconvenient. In addition, measurement errors occur when using a ruler for measurement, which can easily lead to inaccurate determination of the focal plane position, affecting marking quality and processing efficiency.

[0003] Prior art, such as publication number CN207205561U, provides an autofocus device for a laser marking machine. The device includes an F-θ field lens mounted at the lower front end of a lifting arm. A laser distance sensor is attached to the side of the arm's front end and connected to a controller input. The device also includes a lifting column secured to a base and equipped with a lifting mechanism. Using this structure, the present invention uses a laser distance sensor to detect the distance from the F-θ field lens to the workpiece's marking surface, eliminating errors associated with manual scale reading. Furthermore, the device eliminates the need for direct contact with the workpiece surface during operation, eliminating the risk of damage.

[0004] This solution has the effect of automatic focusing, eliminating the error when manually reading the scale value. However, when marking parts of different thicknesses and shapes, it is necessary to adjust the position of the laser ranging sensor by adjusting the marking cross arm. After the ranging is completed, the marking cross arm needs to be adjusted to adjust the position of the laser marking head. The process is relatively cumbersome. In view of this, we propose an auxiliary focusing device for the laser marking machine. Utility Model Content

[0005] The purpose of the utility model is to provide an auxiliary focusing device for a laser marking machine, which solves the problem that the distance measurement and positioning process is relatively complicated.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An auxiliary focusing device for a laser marking machine comprises a workbench, wherein a distance measuring mechanism is provided on the top back of the workbench for measuring and positioning the focal length;

[0008] The workbench is provided with focusing components at both sides of the distance measuring mechanism, for calibrating the focal length between the actual and the workpiece;

[0009] A clamping mechanism is provided in the middle of the top of the workbench for positioning and fixing the workpiece to be processed;

[0010] The distance measuring mechanism includes a column, which is connected to the back of the top of the workbench. The top of the column is slidably connected to an adjustment frame. The front of the adjustment frame is connected to a marking device. The outer wall of the marking device is connected to a laser rangefinder. The column is slidably connected to an adjustment ring at a position below the adjustment frame. Electric telescopic rods are respectively connected to the positions on both sides between the adjustment ring and the adjustment frame.

[0011] Preferably, the focusing assembly includes a hinge block, the hinge block is connected to one side of the adjustment ring, and the hinge block is connected to the adjustment roller via a hinge rod.

[0012] Preferably, the clamping mechanism includes a bidirectional threaded rod, which is arranged above the workbench, and the top of the workbench is connected to a motor for driving the bidirectional threaded rod to rotate, and threaded blocks are respectively threaded on both sides of the outer wall of the bidirectional threaded rod, and the threaded blocks are slidably connected to the top of the workbench, and the front of the threaded block is evenly connected with a clamping plate for clamping the workpiece.

[0013] Preferably, a positioning plate is provided on the back side between the clamping plates, and the positioning plate is connected to the workbench.

[0014] Preferably, linkage components are respectively provided at positions on the top of the workbench corresponding to the focusing components, and the linkage components include a support shaft, the support shaft is rotatably connected to the top of the workbench, and the outer wall of the support shaft is connected to a right-angle rod.

[0015] Preferably, the top of the support shaft and the hinged position of the hinge rod are respectively connected to sprockets, and the sprockets are connected through chain transmission.

[0016] Preferably, a sliding column is connected to the bottom of the right-angle rod, and a right-angle groove is provided at the top of the threaded block at a position corresponding to the sliding column.

[0017] By means of the above technical solution, the present invention provides an auxiliary focusing device for a laser marking machine, which has at least the following beneficial effects:

[0018] 1. The utility model sets a distance measuring mechanism. When adjusting the focal length of the marking device, the focal length is first measured by a laser rangefinder, and then adjusted by an electric telescopic rod so that the distance between the marking device on the adjustment frame and the adjustment ring is consistent, so as to adjust the processing height of the marking device.

[0019] 2. When the utility model starts to calibrate the position of the workpiece, the adjustment roller is driven to rotate by the rotation of the hinged rod and contacts the surface of the workpiece. Since the distance between the marking device on the adjustment frame and the adjustment ring is in a consistent state, the distance between the marking device and the workpiece surface is at a suitable marking distance. When the thickness of the workpiece changes, since the adjustment roller serves as the support point of the adjustment ring, when the thickness of the workpiece is inconsistent, the position of the adjustment roller support will automatically adjust according to the change of the workpiece thickness, so that the distance between the marking device and the workpiece surface is always consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic structural diagram of the distance measuring mechanism in the present utility model;

[0023] Figure 3 This is a schematic structural diagram of the focusing assembly and the connecting assembly in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the clamping mechanism in the utility model.

[0025] In the figure: 1. Workbench; 2. Distance measuring mechanism; 21. Column; 22. Adjustment frame; 23. Marking device; 24. Laser rangefinder; 25. Adjustment ring; 26. Electric telescopic rod; 3. Focusing assembly; 31. Articulated block; 32. Articulated rod; 33. Adjustment roller; 4. Clamping mechanism; 41. Bidirectional threaded rod; 42. Motor; 43. Threaded block; 44. Clamping plate; 45. Positioning plate; 5. Linkage assembly; 51. Support shaft; 52. Right-angle rod; 53. Sliding column; 54. Right-angle slot; 55. Sprocket. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] An auxiliary focusing device for a laser marking machine, such as Figure 1 、 Figure 2 、 Figure 3 As shown, it includes a workbench 1, a distance measuring mechanism 2 is provided at the top back of the workbench 1 for measuring and positioning the focal length, and focusing components 3 are respectively provided at the positions on both sides of the distance measuring mechanism 2 of the workbench 1 for calibrating the actual focal length with the workpiece, and a clamping mechanism 4 is provided at the middle position of the top of the workbench 1 for positioning and fixing the processed workpiece, wherein the distance measuring mechanism 2 includes a column 21, the column 21 is connected to the back of the top of the workbench 1, the top of the column 21 is slidably connected to an adjusting frame 22, the front of the adjusting frame 22 is connected to a marking device 23, the outer wall of the marking device 23 is connected to a laser rangefinder 24, the column 21 is slidably connected to an adjusting ring 25 at a position below the adjusting frame 22, and electric telescopic rods 26 are respectively connected to the positions on both sides between the adjusting ring 25 and the adjusting frame 22, and the focusing component 3 includes a hinge block 31, the hinge block 31 is connected to one side of the adjusting ring 25, and the hinge block 31 is connected to an adjusting roller 33 through a hinge rod 32.

[0029] In this embodiment, by setting up a distance measuring mechanism 2, when adjusting the focal length of the marking device 23, the focal length is first measured by the laser rangefinder 24, and then adjusted by the electric telescopic rod 26 so that the distance between the marking device 23 and the adjusting ring 25 on the adjusting frame 22 is consistent. When the position of the workpiece is calibrated, the adjusting roller 33 is driven to rotate by the rotation of the hinged rod 32 and contacts the surface of the workpiece. At this time, the distance between the marking device 23 and the surface of the workpiece is at a suitable marking distance. When the thickness of the workpiece changes, since the adjusting roller 33 serves as the support point of the adjusting ring 25, when the thickness of the workpiece is inconsistent, the position supported by the adjusting roller 33 will automatically adjust according to the change in the thickness of the workpiece, so that the distance between the marking device 23 and the surface of the workpiece is always consistent.

[0030] Example 2

[0031] like Figure 1 、 Figure 4As shown, on the basis of Example 1, preferably, the clamping mechanism 4 includes a bidirectional threaded rod 41, the bidirectional threaded rod 41 is arranged above the workbench 1, and the top of the workbench 1 is connected to a motor 42 for driving the bidirectional threaded rod 41 to rotate, and threaded blocks 43 are respectively threaded on both sides of the outer wall of the bidirectional threaded rod 41, and the threaded blocks 43 are slidingly connected to the top of the workbench 1, and the front of the threaded block 43 is evenly connected with a clamping plate 44 for clamping the workpiece, and a positioning plate 45 is provided at the back between the clamping plates 44, and the positioning plate 45 is connected to the workbench 1.

[0032] In this embodiment, the workpiece is placed on the workbench 1 and against the positioning plate 45, and then the bidirectional threaded rod 41 is driven to rotate by starting the motor 42, and the clamping plates 44 are driven closer to each other by the threaded block 43 to clamp and fix the workpiece to avoid displacement of the workpiece during processing.

[0033] Example 3

[0034] like Figure 1 - Figure 4 As shown, on the basis of Example 2, preferably, a linkage assembly 5 is respectively provided at the position corresponding to the focusing assembly 3 on the top of the workbench 1, and the linkage assembly 5 includes a support shaft 51, which is rotatably connected to the top of the workbench 1, and the outer wall of the support shaft 51 is connected to a right-angle rod 52, and the position where the top of the support shaft 51 is hinged to the hinge rod 32 is respectively connected to a sprocket 55, and the sprockets 55 are connected by a chain transmission, and the bottom of the right-angle rod 52 is connected to a sliding column 53, and a right-angle groove 54 is provided at the position corresponding to the sliding column 53 on the top of the threaded block 43.

[0035] If the threaded block 43 is still in the process of continuously approaching, the subsequent slide post 53 will slide into the groove of the horizontal path of the right-angle groove 54 to avoid affecting the movement of the threaded block 43.

[0036] When the auxiliary focusing device of a laser marking machine of the present invention is in use, by setting a distance measuring mechanism 2, when adjusting the focal length of the marking device 23, the focal length is first measured by the laser rangefinder 24, and the electric telescopic rod 26 is adjusted to make the distance between the marking device 23 on the adjusting frame 22 and the adjusting ring 25 be in a consistent state. When starting to calibrate the position of the workpiece, the workpiece is placed on the workbench 1 and against the positioning plate 45, and then the bidirectional threaded rod 41 is driven to rotate by starting the motor 42, and the clamping plates 44 are driven to move closer to each other by the threaded block 43 to clamp and fix the workpiece to avoid displacement of the workpiece during the processing. When the threaded block 43 drives the clamping plate 44 to move, the right-angle groove 54 pushes the sliding column 53 to drive the sprocket 55 connected to the right-angle rod 52 to rotate. Under the transmission of the chain, the rotation of the articulated rod 32 drives the adjusting roller 33 to rotate together. During the rotation of the right-angle rod 52, the sliding column 53 and the threaded rod 43 are connected to each other. When the screw block 43 is still in the process of approaching, the subsequent sliding post 53 will slide into the groove of the horizontal path of the right-angle groove 54 to avoid affecting the movement of the screw block 43. The rotation of the hinged rod 32 drives the adjusting roller 33 to rotate and contact the surface of the workpiece. At this time, the distance between the marking device 23 and the workpiece surface is at a suitable marking distance. When the thickness of the workpiece changes, since the adjusting roller 33 serves as the support point of the adjusting ring 25, when the thickness of the workpiece is inconsistent, the position supported by the adjusting roller 33 will automatically adjust according to the change of the thickness of the workpiece, so that the distance between the marking device 23 and the workpiece surface is always consistent.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, workpiece, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, workpiece, or apparatus.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary focusing device for a laser marking machine, comprising a workbench (1), characterized in that: A distance measuring mechanism (2) is provided on the top back of the workbench (1) for measuring and positioning the focal length; The workbench (1) is provided with focusing components (3) at positions on both sides of the distance measuring mechanism (2) for calibrating the actual focal length and the focal length of the workpiece; A clamping mechanism (4) is provided at the middle of the top of the workbench (1) for positioning and fixing the workpiece to be processed; The distance measuring mechanism (2) comprises a column (21), the column (21) is connected to the back of the top of the workbench (1), the top of the column (21) is slidably connected to an adjustment frame (22), the front of the adjustment frame (22) is connected to a marking device (23), the outer wall of the marking device (23) is connected to a laser rangefinder (24), the column (21) is slidably connected to an adjustment ring (25) at a position below the adjustment frame (22), and electric telescopic rods (26) are respectively connected to positions on both sides between the adjustment ring (25) and the adjustment frame (22).

2. The auxiliary focusing device of a laser marking machine according to claim 1, characterized in that: The focusing assembly (3) comprises a hinge block (31), the hinge block (31) is connected to one side of the adjustment ring (25), and the hinge block (31) is connected to an adjustment roller (33) via a hinge rod (32).

3. The auxiliary focusing device for a laser marking machine according to claim 1, characterized in that: The clamping mechanism (4) includes a bidirectional threaded rod (41), the bidirectional threaded rod (41) is arranged above the workbench (1), and the top of the workbench (1) is connected to a motor (42) for driving the bidirectional threaded rod (41) to rotate, and threaded blocks (43) are respectively threadedly connected on both sides of the outer wall of the bidirectional threaded rod (41), and the threaded blocks (43) are slidably connected to the top of the workbench (1), and the front of the threaded blocks (43) are evenly connected to a clamping plate (44) for clamping a workpiece.

4. The auxiliary focusing device for a laser marking machine according to claim 3, characterized in that: A positioning plate (45) is provided at the back between the clamping plates (44), and the positioning plate (45) is connected to the workbench (1).

5. The auxiliary focusing device for a laser marking machine according to claim 4, characterized in that: A linkage assembly (5) is provided at a position on the top of the workbench (1) corresponding to the focusing assembly (3), and the linkage assembly (5) comprises a support shaft (51), the support shaft (51) is rotatably connected to the top of the workbench (1), and the outer wall of the support shaft (51) is connected to a right-angle rod (52).

6. The auxiliary focusing device for a laser marking machine according to claim 5, characterized in that: The top of the support shaft (51) and the hinged position of the hinge rod (32) are respectively connected with sprockets (55), and the sprockets (55) are connected through chain transmission.

7. The auxiliary focusing device for a laser marking machine according to claim 6, characterized in that: The bottom of the right-angle rod (52) is connected with a sliding column (53), and the top of the threaded block (43) is provided with a right-angle groove (54) at a position corresponding to the sliding column (53).

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