Focal length self-adaptive VIN laser depth engraving mechanism

Abstract

A focal length self-adaptive VIN laser depth engraving mechanism belongs to the field of laser engraving and comprises a laser engraving head, a floating vertical plate is located on one side, connected with a robot, of the laser engraving head, a connecting vertical plate is arranged between the floating vertical plate and the laser engraving head and comprises a first connecting plate and a second connecting plate, and the first connecting plate and the second connecting plate are perpendicular to each other. The floating vertical plate and the first connecting plate are in sliding connection through a sliding assembly, the sliding assembly is vertically arranged, and the floating vertical plate and the first connecting plate are further connected through an elastic thrust assembly which is vertically arranged, so that the first connecting plate and the floating vertical plate can relatively move in the vertical direction; a second connecting plate is rotationally connected with the laser engraving head through a rotating assembly, so that the laser engraving head can automatically rotate around a shaft under the action of thrust, and then the left-right height difference is adjusted; and the coding effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of laser marking, in particular to a VIN laser deep marking mechanism with self-adaptive focal length. Background Technique

[0002] The vehicle VIN code (i.e., vehicle identification number) is the unique identity identifier of a vehicle and is also known as the vehicle identification number. It consists of 17 characters (including numbers and letters) and contains important information such as the vehicle manufacturer, production year, vehicle model, body type and code, engine code, and assembly location.

[0003] The vehicle VIN code is generally marked on the vehicle frame through a laser marking device. The laser marking device includes a laser marking head. The laser marking head is driven by a robot to move to the position of the marking seat crossbeam and is pressed against the surface of the vehicle frame for marking. As Figure 1 shown, a positioning block 14 is fixedly arranged at the bottom of the existing laser marking head. The laser marking head is positioned by contacting the marking plane through the positioning block 14, thereby ensuring the positioning of the focal length (i.e., the working distance).

[0004] Since the focal length is the most important parameter in laser production, a suitable focal length is a necessary condition for achieving good marking effects. The existing VIN laser deep marking head contacts the marking plane through two positioning blocks 14 and then starts the air knife for laser marking. Due to the height difference that exists during the automatic welding process of the vehicle frame crossbeam and the position changes or left-right unevenness that occur during the station positioning of the vehicle frame, the laser marking head can only be positioned by the positioning block 14 and cannot automatically adapt to the height differences in the vertical and left-right directions, resulting in inconsistent working distances on the left and right, and problems such as inconsistent left and right depths of the marked VIN code and poor coding effects. Content of the Utility Model

[0005] In order to solve the technical problem in the above background technique that the existing laser marking head cannot automatically adapt to the height differences in the vertical and left-right directions, resulting in inconsistent left and right depths of the VIN code and poor coding effects, the utility model provides a VIN laser deep marking mechanism with self-adaptive focal length.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides a VIN laser deep engraving mechanism with self - adapting focal length, which comprises a laser engraving head and a self - adapting adjustment component. The self - adapting adjustment component includes a floating vertical plate located on the side where the laser engraving head is connected to the robot. A connecting vertical plate is arranged between the floating vertical plate and the laser engraving head. The connecting vertical plate includes a first connecting plate and a second connecting plate which are perpendicular to each other. The floating vertical plate and the first connecting plate are slidably connected through a sliding component. The sliding component is arranged vertically. The floating vertical plate and the first connecting plate are also connected through an elastic thrust component arranged vertically. The second connecting plate is rotatably connected to the laser engraving head through a rotating component. The settings of the sliding component and the elastic thrust component enable the first connecting plate to move relatively vertically with respect to the floating vertical plate, so that after the robot moves in place according to the set program, the laser engraving head can still probe down to achieve the self - adapting adjustment of the height difference of the workpiece. The setting of the rotating component enables the laser engraving head to automatically rotate around the axis under the action of thrust, thereby adjusting the left - right height difference of the laser engraving head and ensuring the coding effect.

[0008] Preferably, the connecting vertical plate is of an L - shaped plate structure, which is convenient for connecting with the laser engraving head and the floating vertical plate through the sliding component and the rotating component respectively.

[0009] Preferably, the elastic thrust component includes a pressure plate and a bottom plate. The pressure plate is fixedly arranged on the floating vertical plate, and the bottom plate is fixedly arranged on the first connecting plate. The pressure plate is located above the bottom plate, and a spring is arranged between the pressure plate and the bottom plate. When the laser engraving head descends in place according to the set distance, the robot drives the laser engraving head to press down further. When the vehicle frame is lower, the laser engraving head probes down to ensure the working distance. When the height of the vehicle frame is appropriate, the spring is compressed to ensure the working distance, and the self - adapting adjustment of the height difference of the workpiece can be realized.

[0010] Preferably, a guide post is fixedly arranged on the bottom plate. The guide post penetrates through the pressure plate and is slidably connected to the pressure plate. The spring is sleeved on the guide post, and the guide post can limit the position of the spring to avoid the radial movement of the spring.

[0011] Preferably, the rotating component includes a rotating shaft. The rotating shaft is fixedly arranged on the laser engraving head. A mounting seat is fixedly installed on the second connecting plate, and a bearing is fixedly arranged in the mounting seat. The rotating shaft is fixedly connected to the inner ring of the bearing. When the workpiece is positioned obliquely, the laser engraving head can rotate around the axis under the action of downward pressure to adapt to the inclined workpiece, adjust the left - right height difference of the workpiece, and ensure the coding accuracy.

[0012] Preferably, the second connecting plate and the laser marking head are connected through a rotation limiting component. The rotation limiting component includes a first connecting piece and a second connecting piece that are perpendicular to each other. The first connecting piece is fixedly installed on the laser marking head, and the second connecting piece is fixedly installed on the second connecting plate. Two vertically opposite elastic blocks are fixedly arranged inside the second connecting piece. One end of the first connecting piece is inserted between the two elastic blocks. The moving distance of the first connecting piece is restricted by the elastic blocks, thereby restricting the rotation angle of the laser marking head and preventing the laser marking head from rotating excessively and colliding with the first connecting plate.

[0013] Preferably, the first connecting piece has a T-shaped structure, and the second connecting piece has a C-shaped structure, which is convenient for the connection and cooperation between the first connecting piece and the second connecting piece.

[0014] Preferably, there is a gap between the laser marking head and the first connecting plate, which prevents the first connecting plate from obstructing the laser marking head and avoids collision between the laser marking head and the first connecting plate.

[0015] Preferably, the sliding component includes a slide rail and a slider. The slide rail is vertically fixedly arranged on the floating vertical plate, and the slider is fixedly arranged on the first connecting plate. The slider is slidably connected to the slide rail, which is convenient for ensuring the vertical movement stability between the floating vertical plate and the first connecting plate.

[0016] It can be seen from the above technical solutions that the advantages of the present utility model are as follows:

[0017] 1. The settings of the sliding component, the elastic thrust component, and the rotation component enable the first connecting plate to move relatively vertically with the floating vertical plate, thereby driving the laser marking head to move vertically. This is convenient for the laser marking head to continue to probe downward after the robot moves in place according to the set program, so as to realize the adaptive adjustment of the height difference of the workpiece and will not damage the laser marking head. The setting of the rotation component enables the laser marking head to automatically rotate around the axis under the action of the thrust, thereby adjusting the left and right height difference of the laser marking head and ensuring the coding effect.

[0018] 2. The second connecting plate and the laser marking head are connected through a rotation limiting component. The moving distance of the first connecting piece is restricted by the elastic blocks, thereby restricting the rotation angle of the laser marking head and preventing the laser marking head from rotating excessively and colliding with the first connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic structural diagram of the existing laser engraving head mentioned in the background art;

[0021] Figure 2 Stereoscopic structural diagram of the laser deep engraving mechanism according to one or more embodiments of the present invention (perspective view at the mounting base);

[0022] Figure 3 Frontal structural diagram of the laser deep engraving mechanism according to one or more embodiments of the present invention;

[0023] The components represented by the reference numerals in the figure are:

[0024] 1. Floating vertical plate; 2. Slide rail; 3. Spring; 4. Pressing plate; 5. Bottom plate; 6. Slide block; 7. Connecting vertical plate; 8. Rotating shaft; 9. Bearing; 10. Rotation limiting component; 11. First connecting piece; 12. Second connecting piece; 13. Elastic block; 14. Positioning block. Specific embodiments

[0025] To make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the specific embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.

[0026] In a typical embodiment of the present invention, as Figure 2 - Figure 3 shown, a VIN laser deep engraving mechanism with focal length self - adaptation is proposed, including: a laser engraving head and a self - adaptive adjustment component. The laser engraving head is connected to the self - adaptive adjustment component, and the laser engraving head is connected to the robot through the self - adaptive adjustment component to adaptively adjust the height difference of the laser engraving head, ensure the positioning accuracy of the focal length, and improve the engraving effect.

[0027] Specifically, the self - adaptive adjustment component includes a floating vertical plate 1 and a connecting vertical plate 7. As Figure 1 shown, the floating vertical plate 1 is a vertically arranged plate - like structure. The floating vertical plate 1 is located on the side where the laser engraving head is connected to the robot. The floating vertical plate 1 is provided with a connecting hole for connecting to the robot. On the surface of the floating vertical plate 1 close to the laser engraving head (which can also be understood as the back surface of the floating vertical plate 1), two vertically arranged slide rails 2 are fixedly provided.

[0028] The connecting vertical plate 7 is located between the laser engraving head and the floating vertical plate 1. The connecting vertical plate 7 is of an L-shaped plate structure and includes a first connecting plate and a second connecting plate which are fixedly connected. The first connecting plate is perpendicular to the second connecting plate. The first connecting plate is close to the floating vertical plate 1 and parallel to the floating vertical plate 1. Two sliders 6 are fixedly provided on the first connecting plate of the connecting vertical plate 7. The two sliders 6 are arranged oppositely. The two sliders 6 on the connecting vertical plate 7 correspond to the two slide rails 2 on the floating vertical plate 1 one by one, and the sliders 6 are slidably connected with the corresponding slide rails 2. The sliders 6 and the slide rails 2 together form a sliding assembly.

[0029] A pressing plate 4 is also fixedly provided on the back surface of the floating vertical plate 1. A bottom plate 5 is fixedly provided on the first connecting plate of the connecting vertical plate 7. The pressing plate 4 is located above the bottom plate 5. A guiding column is fixedly provided on the bottom plate 5, and the guiding column penetrates through the pressing plate 4 and is slidably connected with the pressing plate 4. A spring 3 is sleeved on the guiding column. The spring 3 is located between the pressing plate 4 and the bottom plate 5. The spring 3, the pressing plate 4 and the bottom plate 5 together form an elastic thrust assembly. The two sliders 2 are arranged oppositely on both sides of the pressing plate 4.

[0030] The second connecting plate of the connecting vertical plate 7 is parallel to another side surface of the laser engraving head. The second connecting plate is rotationally connected with the laser engraving head through a rotating assembly. Specifically, the rotating assembly includes a rotating shaft 8. The rotating shaft 8 is fixedly provided on the laser engraving head by welding. An installation seat is fixedly installed on the second connecting plate by bolting or other means. A bearing 9 is fixedly provided in the installation seat. The rotating shaft 8 penetrates through the second connecting plate and is fixedly connected with the inner ring of the bearing 9, so that the rotating shaft 8 can rotate relative to the second connecting plate around the axis to change the angle of the laser engraving head, and further adjust the left-right height difference of the laser engraving head.

[0031] In order to limit the rotation angle of the laser engraving head, the second connecting plate and the laser engraving head are also connected through a rotation limiting assembly 10. The rotation limiting assembly 10 includes a first connecting member 11, a second connecting member 12 and an elastic block 13. The first connecting member 11 is fixedly installed on the laser engraving head by bolt fixation. The second connecting member 12 is fixedly installed on the second connecting plate by bolt fixation. The first connecting member 11 is perpendicular to the second connecting member 12. Two elastic blocks 13 are provided and fixedly arranged on the second connecting member 12. The second connecting member 12 is connected with the first connecting member 11 through the elastic blocks 13.

[0032] Specifically, the first connecting member 11 is of a T-shaped structure and includes a fixing part and a limiting part. The limiting part is fixedly arranged at the middle position of the fixing part. The limiting part is perpendicular to the fixing part. The fixing part is fixedly arranged on the laser engraving head. The limiting part is connected with the second connecting member 12.

[0033] The second connecting member 12 is of a C-shaped structure, with one side of the second connecting member 12 open. There are two elastic blocks 13, and the two elastic blocks 13 are fixedly installed on the upper and lower inner walls of the open side of the second connecting member 12 by means of bolts. The limiting portion of the first connecting member 11 is inserted between the two elastic blocks 13, and the upper and lower surfaces of the limiting portion are in close contact with the elastic blocks 13 on its upper and lower sides.

[0034] The elastic block 13 is of a rubber elastic block structure. In other embodiments, it can also be fixedly installed on the second connecting member 12 by means of bonding or the like. Specifically, no further limitations are made here.

[0035] In order to ensure the left-right height adjustment of the laser marking head, there is a gap with a set distance between the laser marking head and the first connecting plate of the connecting vertical plate 7 to prevent the first connecting plate from obstructing the laser marking head and avoid collisions between the laser marking head and the first connecting plate.

[0036] It should be noted that a positioning block 14 is still fixedly installed at the bottom of the laser marking head in this embodiment to contact the surface of the workpiece through the positioning block 14 and limit the focal length.

[0037] The specific working principle is as follows:

[0038] When the laser marking head descends to the set position, the robot drives the laser marking head to continue pressing down. When the vehicle frame is relatively low, the laser marking head probes down to ensure the working distance. When the height of the vehicle frame is appropriate, the spring 3 is compressed to ensure the working distance and play a buffering role, so as not to damage the laser marking head, and it can achieve an adaptive adjustment of the workpiece height difference of ±5 mm.

[0039] The left-right length direction adaptive mechanism composed of the rotating shaft 8, the bearing 9 and the rotation limiting component 10. When the laser marking head presses down, if there is a height difference in the left-right direction of the vehicle frame, the laser marking head will be unevenly stressed during the pressing process. Furthermore, the second connecting member 12 on the second connecting plate will compress the elastic block 13. Under the action of the elastic block 13, the laser marking head can automatically rotate around the rotating shaft 8 to adapt to the workpiece. The adaptable height difference for the left-right adjustment of the laser marking head is ±3 mm, and the adaptation range is greater than the controllable range of the welding accuracy and positioning accuracy of the vehicle frame.

[0040] 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 obvious to those skilled in the art, and the general principles defined herein can 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 rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A focal length adaptive VIN laser deep engraving mechanism, comprising: A laser engraving head and an adaptive adjustment component, characterized in that the adaptive adjustment component comprises a floating vertical plate (1), the floating vertical plate (1) is located at a side of the laser engraving head for connecting with a robot, a connecting vertical plate (7) is provided between the floating vertical plate (1) and the laser engraving head, the connecting vertical plate (7) comprises a first connecting plate and a second connecting plate which are perpendicular to each other, the floating vertical plate (1) and the first connecting plate are slidably connected via a sliding component, the sliding component is vertically arranged, the floating vertical plate (1) and the first connecting plate are also connected via a vertically arranged elastic thrust component, and the second connecting plate is rotatably connected to the laser engraving head via a rotating component.

2. The focal length adaptive VIN laser deep engraving mechanism according to claim 1, characterized in that: The connecting upright plate (7) is an L-shaped plate structure.

3. The focal length adaptive VIN laser deep engraving mechanism according to claim 1, characterized in that: The elastic thrust assembly comprises a pressure plate (4) and a bottom plate (5); the pressure plate (4) is fixedly arranged on the floating vertical plate (1); the bottom plate (5) is fixedly arranged on the first connecting plate; the pressure plate (4) is located above the bottom plate (5); and a spring (3) is arranged between the pressure plate (4) and the bottom plate (5).

4. The focal length adaptive VIN laser deep engraving mechanism according to claim 3, characterized in that: A guide column is fixedly provided on the bottom plate (5), the guide column penetrates the pressing plate (4) and is slidably connected to the pressing plate (4), and the spring (3) is sleeved on the guide column.

5. The focal length adaptive VIN laser deep engraving mechanism according to claim 1, characterized in that: The rotating assembly comprises a rotating shaft (8), which is fixedly arranged on the laser engraving head. A mounting seat is fixedly installed on the second connecting plate, a bearing (9) is fixedly arranged in the mounting seat, and the rotating shaft (8) is fixedly connected to the inner ring of the bearing (9).

6. The focal length adaptive VIN laser deep engraving mechanism according to claim 1, characterized in that: The second connecting plate is connected to the laser engraving head via a rotation limiting assembly (10), the rotation limiting assembly (10) comprising a first connecting member (11) and a second connecting member (12) which are perpendicular to each other, the first connecting member (11) being fixedly mounted on the laser engraving head, the second connecting member (12) being fixedly mounted on the second connecting plate, two elastic blocks (13) which are vertically oppositely arranged are fixedly arranged in the second connecting member (12), and one end of the first connecting member (11) is inserted between the two elastic blocks (13).

7. The focal length adaptive VIN laser deep engraving mechanism according to claim 6, characterized in that: The first connecting member (11) is a T-shaped structure, and the second connecting member (12) is a C-shaped structure.

8. The focal length adaptive VIN laser deep engraving mechanism according to claim 1, characterized in that: There is a gap between the laser engraving head and the first connecting plate.

9. The focal length adaptive VIN laser deep engraving mechanism according to claim 1, characterized in that: The sliding assembly comprises a sliding rail (2) and a sliding block (6); the sliding rail (2) is vertically fixedly arranged on the floating vertical plate (1); the sliding block (6) is fixedly arranged on the first connecting plate; the sliding block (6) is slidably connected to the sliding rail (2).

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