CN111215758B

CN111215758B - Laser marking device

Info

Publication number: CN111215758B
Application number: CN202010182117.1A
Authority: CN
Inventors: 唐渝; 芮执元; 剡昌锋; 付蓉; 裘应驰; 刘兴华; 李景俊; 曹鹏
Original assignee: Lanzhou University of Technology
Current assignee: Lanzhou University of Technology
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2022-03-18
Anticipated expiration: 2040-03-16
Also published as: CN111215758A

Abstract

The invention belongs to the technical field of marking equipment. The invention discloses a laser marking device, aiming at improving the marking precision of the side surface in a metal ingot. The laser marking device comprises a swinging unit, a horizontal adjusting unit, a height adjusting unit, a laser marking unit and a supporting platform; the laser marking unit is internally provided with a laser marking machine and is connected with the swinging unit, the swinging unit is positioned on the supporting platform and drives the laser marking unit to swing back and forth in a vertical plane by taking the supporting platform as a reference, and the laser marking unit is positioned on different surfaces of the metal ingot to be marked; the supporting platform is simultaneously connected with the horizontal adjusting unit and the height adjusting unit, and the horizontal position and the height position are adjusted under the driving of the horizontal adjusting unit and the height adjusting unit. The laser marking device provided by the invention is used for marking the metal ingot, so that the positioning and marking precision of the opposite side surface can be improved, and the positioning and marking operation of different surfaces can be realized.

Description

Laser marking device

Technical Field

The invention belongs to the technical field of marking equipment, and particularly relates to a laser marking device capable of positioning and marking multiple surfaces in a metal ingot.

Background

In the metal smelting product, the mark is used as a main bearing of important information of the metal smelting product, and is usually positioned on the surface of the metal smelting product for knowing the relevant production condition of the metal smelting product. Referring to fig. 5, for a metal ingot product with a trapezoidal shape, the mark is generally formed on the side surface 62 of the metal ingot by a laser printing apparatus after the metal ingot is demolded and formed.

However, the external dimensions of the metal ingots produced by different molds after being demolded are not completely uniform due to the difference in dimensions between the molds used for processing the metal ingots, and the position and posture of the metal ingots are also deflected to various degrees during the entire transportation of the plurality of metal ingots to the laser marking station after being stacked in multiple layers. Therefore, the laser marking machine cannot accurately identify and position the side surface position of each metal ingot, and further can mark the side surface of the metal ingot to cause the problem of irregular mark codes and even can not accurately mark the mark codes on the corresponding metal ingot to cause wrong marking.

Disclosure of Invention

The invention provides a laser marking device for improving the marking accuracy of a metal ingot. The laser marking device comprises a swinging unit, a horizontal adjusting unit, a height adjusting unit, a laser marking unit and a supporting platform; the laser marking device comprises a laser marking unit, a swinging unit, a supporting platform and a positioning unit, wherein the laser marking unit is internally provided with a laser marking machine and is connected with the swinging unit, the swinging unit is positioned on the supporting platform and drives the laser marking unit to swing back and forth in a vertical plane by taking the supporting platform as a reference, and the laser marking unit is positioned on different surfaces of a metal ingot to be marked; the supporting platform is simultaneously connected with the horizontal adjusting unit and the height adjusting unit, and the horizontal position and the height position are adjusted under the driving of the horizontal adjusting unit and the height adjusting unit.

Preferably, the swing unit comprises a swing motor, a first connecting rod, a second connecting rod, a third connecting rod and a connecting frame; the swing motor is fixed on the upper surface of the supporting platform, one end of the first connecting rod is fixedly connected with an output shaft of the swing motor, the other end of the first connecting rod is hinged with one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected with the connecting frame; one end of the third connecting rod is hinged with the upper surface of the supporting platform, and the other end of the third connecting rod is fixedly connected with the connecting frame; the connecting frame is a deformable square frame structure and is formed by sequentially connecting a plurality of parallelogram frames which are arranged in parallel along the vertical direction through a plurality of horizontal connecting rods; the second connecting rod, the third connecting rod and the laser marking unit are respectively and fixedly connected with three edges in the connecting frame, and the third connecting rod and the laser marking unit are fixedly connected with two parallel edges.

Preferably, the swing unit further comprises a left limit block and a right limit block; the left limiting block and the right limiting block are both arranged on the upper surface of the supporting platform and are respectively positioned on two sides of the third connecting rod and used for limiting the limit position of the third connecting rod in reciprocating swing.

Preferably, the horizontal adjusting unit comprises a horizontal motor, a horizontal lead screw and a horizontal lead screw nut; the horizontal screw rod is fixed in the area below the supporting platform along the horizontal direction, the horizontal screw rod nut is fixed on the lower surface of the supporting platform and sleeved on the horizontal screw rod, and an output shaft of the horizontal motor is connected with one end of the horizontal screw rod to drive the horizontal screw rod to rotate in a reciprocating mode.

Further preferably, the horizontal adjusting unit further comprises a horizontal guide rod and a horizontal guide block; the horizontal guide rod is positioned in the lower area of the supporting platform and is parallel to the horizontal lead screw, and the horizontal guide block is fixed on the lower surface of the supporting platform, sleeved on the horizontal guide rod and capable of sliding in a reciprocating mode in the horizontal direction.

Preferably, the height adjusting unit comprises a vertical motor, a vertical lead screw and a vertical lead screw nut; the vertical screw rod is fixed in a one-side area of the supporting platform along the vertical direction, the vertical screw rod nut is fixedly connected with the supporting platform and sleeved on the vertical screw rod, and an output shaft of the vertical motor is connected with one end of the vertical screw rod to drive the vertical screw rod to rotate in a reciprocating mode.

Further preferably, the height adjusting unit further comprises a vertical guide rod; the vertical guide rod is fixed on one side area of the supporting platform along the vertical direction, and the supporting platform is connected with the vertical guide rod in a sliding mode and can slide relatively along the vertical direction.

Preferably, the laser marking unit comprises a distance measuring sensor and a mounting plate; the mounting panel with swing unit fixed connection, laser marking machine with the range finding sensor is installed the surface of mounting panel is used for marking respectively and range finding location.

Preferably, the laser marking unit further comprises a fixing frame, a turning frame and a first turning motor; the fixed frame with swing unit direct fixed connection, first upset motor with fixed frame fixed connection, the upset frame is located in the fixed frame and with the output shaft of first upset motor is connected, follows the output shaft reciprocating rotation of first upset motor carries out reciprocal upset, the mounting panel is fixed in the upset frame and follow the upset frame is carried out the upset in step.

Further preferably, the laser marking unit further comprises a second turnover motor; the second turnover motor is fixed on the turnover frame, the mounting plate is fixedly connected with an output shaft of the second turnover motor, and an output shaft of the first turnover motor is perpendicular to an output shaft of the second turnover motor.

When the laser marking device is adopted to mark a metal ingot, the invention has the following beneficial technical effects:

1. according to the invention, by means of the adjustment of the spatial position of the laser marking unit and the orientation of the laser marking machine in the laser marking unit by the swinging unit, the horizontal adjusting unit and the height adjusting unit, the laser marking machine can be rapidly switched between the two surfaces of the metal ingot block to complete the positioning and distance adjustment of the two surfaces, so that the two surfaces of the metal ingot block can be rapidly and accurately subjected to distance measurement positioning and marking operation, and the accuracy and efficiency of the whole marking are improved.

2. According to the invention, the orientation of the laser marking machine is turned and adjusted by adopting the laser marking unit consisting of the mounting plate, the fixing frame, the turning frame, the first turning motor and the second turning motor, so that the orientation of the laser marking machine is finely adjusted, the marking precision and quality are further improved, and the marking efficiency is ensured.

3. In the invention, the limit block is distributed on the upper surface of the supporting platform to position the left-right swinging limit position of the third connecting rod, so that when the crank-rocker mechanism consisting of the swinging motor, the first connecting rod and the second connecting rod drives the laser marking unit to switch two working positions, the laser marking unit can be quickly and accurately positioned by means of the limit block, thereby improving the switching speed of the working positions of the laser marking unit and improving the whole marking efficiency.

Drawings

Fig. 1 is a schematic structural diagram of an external shape of the laser marking apparatus according to the embodiment;

fig. 2 is a schematic view of a partial structure of the laser marking unit connected to the second connecting rod and the third connecting rod in this embodiment;

FIG. 3 is a schematic view of a partial structure of the connection of the supporting frame, the horizontal adjusting unit and the height adjusting unit in this embodiment;

FIG. 4 is a schematic structural diagram of a laser marking unit in the present embodiment;

FIG. 5 is a schematic view of a multi-layer stacking of a plurality of metal ingots.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1 to 4, the laser marking device of the present embodiment includes a swing unit 2, a horizontal adjustment unit 3, a height adjustment unit 4, a laser marking unit 5, and a support platform 6, which are located inside a support frame 1. Wherein the laser marking unit 5 is connected with the swinging unit 2 and is provided with a laser marking machine for marking the metal ingot. The swinging unit 2 is positioned on the upper surface of the supporting platform 6, and can drive the laser marking unit 5 to swing back and forth in a vertical plane by taking the supporting platform 6 as a reference, so that the laser marking unit 5 is positioned on different surfaces of the metal ingot. The supporting platform 6 is connected with the horizontal adjusting unit 3 and the height adjusting unit 4 at the same time, and the supporting platform 6 can move in the horizontal direction and the vertical height direction under the driving of the horizontal adjusting unit 3 and the height adjusting unit 4, so that the space position of the laser marking unit 5 can be adjusted.

As shown in fig. 1 and 2, in the present embodiment, the swing unit 2 includes a swing motor 21, a first link 22, a second link 23, three third links 24, and a connection frame 25 for directly connecting with the laser marking unit 5. Wherein, swing motor 21 passes through the motor cabinet direct mount to be fixed at the upper surface of supporting platform 6, the one end of first connecting rod 22 and swing motor 21's output fixed connection, the other end is passed through fixed hinge with the one end of second connecting rod 22 and is connected, the other end and the connection frame 25 fixed connection of second connecting rod 23, simultaneously, three third connecting rod 24 parallel lay and one end passes through fixed hinge with the upper surface of supporting platform 6 and is connected, the other end and connection frame 25 fixed connection. At the moment, the swing motor, the first connecting rod and the second connecting rod form a crank rocker mechanism, and the position of the connecting frame in the same vertical plane can be adjusted in a reciprocating mode under the rotating supporting effect of the third connecting rod on the connecting frame.

In this embodiment, the connecting frame 25 is a deformable square frame structure, and is formed by two

deformable parallelogram frames

251 and 252 sequentially arranged in the vertical direction and connected by four horizontal connecting rods 253, wherein the second connecting rod 23, the third connecting rod 24 and the laser marking unit 5 are respectively and fixedly connected with three edges in the connecting frame 25, according to the direction shown in fig. 2, the third connecting rod 24 and the laser marking unit 5 are respectively and fixedly connected with two edges in the connecting frame 25 in the vertical direction, and the second connecting rod 23 is fixedly connected with an edge in the connecting frame 25 in the horizontal direction.

At the moment, in the process that the swing motor drives the connecting frame to perform reciprocating adjustment on the position in the vertical plane through the first connecting rod and the second connecting rod, two parallelogram frames in the connecting frame deform, so that the orientation of the laser marking machine in the laser marking unit connected with the connecting frame is always parallel to the third connecting rod, the orientation of the laser marking machine in the laser marking unit can be accurately adjusted and controlled, and switching operation of the laser marking machine among different surfaces in the metal ingot is realized.

In addition, still be equipped with two stopper in the swing unit of this embodiment, left stopper and right stopper promptly. Wherein, left stopper and right stopper all are located supporting platform's upper surface and fix respectively in the both sides of third connecting rod for the extreme position to the third connecting rod back and forth swing fixes a position, thereby can beat quick accurate adjustment to preset position of mark unit with laser, accomplishes the quick accurate switching between two positions, improves the speed of position adjustment, improves and beats mark efficiency.

According to the angle relation between different surfaces in different metal ingots, the positions of the two limiting blocks relative to the third connecting rod can be freely adjusted and changed, so that the left-right swinging limit position of the third connecting rod corresponds to the angle between different surfaces in the metal ingots, and the aim of quickly and accurately switching the positions of the laser marking units is fulfilled.

In this embodiment, the swing motor adopts a conventional motor, and the laser marking unit is rapidly switched between two extreme positions in a vertical plane through the mutual matching with the limiting block. Similarly, in other embodiments, the swing motor can also directly select a stepping motor, and the accurate adjustment of the position of the laser marking unit in the vertical plane can be realized by controlling the rotation angle of the stepping motor, or even the accurate positioning of a plurality of positions can be realized.

Referring to fig. 1 and 3, a horizontal plate 11 is further disposed on the support frame 1 of the present embodiment, and the horizontal adjustment unit 3 includes a horizontal motor 31, a horizontal lead screw 32, and a horizontal lead screw nut 33. Wherein the horizontal plate 11 is laid in the horizontal direction in the lower region of the support platform 6 and the horizontal spindle 32 is fixed in the horizontal direction on the horizontal plate 11 by means of a bearing. The horizontal screw nut 33 is fixed on the lower surface of the supporting platform 6 and sleeved on the horizontal screw 32, and the horizontal screw nut and the horizontal screw 32 form threaded transmission connection. An output shaft of the horizontal motor 31 is connected to one end of the horizontal screw 32, and can drive the horizontal screw 32 to rotate reciprocally.

At the moment, the horizontal motor drives the horizontal screw to rotate in a reciprocating manner, and the horizontal screw nut can drive the supporting platform to move back and forth in the horizontal direction along the horizontal screw, so that the position of the laser marking unit in the horizontal direction can be adjusted.

As shown in fig. 1, the horizontal adjustment unit 3 is further provided with a horizontal guide bar 34 and a horizontal guide block 35. Wherein, the horizontal guide bar 34 is located in the lower region of the support platform 6, and is fixed on the horizontal plate 11 in a positional relationship parallel to the horizontal lead screw 32. The horizontal guide block 35 is fixed on the lower surface of the support platform 6 and sleeved on the horizontal guide rod 34, and can perform reciprocating sliding in the horizontal direction relative to the horizontal guide rod 34. At the moment, the reciprocating movement of the supporting platform along the horizontal direction can be guided in an auxiliary manner by virtue of the horizontal guide rod and the horizontal guide block, so that the smoothness and the stability of the reciprocating movement of the supporting platform in the horizontal direction driven by the horizontal motor are improved.

As shown in fig. 1 and 3 in conjunction, the height adjusting unit 4 of the present embodiment includes a vertical motor 41, a vertical lead screw 42, and a vertical lead screw nut. Wherein, vertical lead screw 42 is located one side of supporting platform 6 to after passing horizontal plate 11 along vertical direction, through bearing frame along vertical direction and support frame 1 fixed connection, be connected through vertical lead screw nut between vertical lead screw 42 and the horizontal plate 11, form the screw thread transmission and connect. An output shaft of the vertical motor 41 is connected with one end of a vertical screw 42, and drives the vertical screw to rotate in a reciprocating manner.

At the moment, the vertical screw rod is driven to rotate in a reciprocating mode through the vertical motor, the horizontal plate can be driven to move back and forth in the vertical direction along the vertical screw rod through the vertical screw rod nut, and therefore the height position of the whole supporting platform is adjusted, and the height position of the laser marking unit in the vertical direction is adjusted.

Meanwhile, as shown in fig. 1, a vertical guide bar 43 is further provided in the height adjusting unit 4. The vertical guide rod 43 penetrates the horizontal plate 11 along the vertical direction and is fixedly connected with the support frame 1, and a relative sliding connection in the vertical direction is formed between the vertical guide rod 43 and the horizontal plate 11. At the moment, the reciprocating movement of the supporting platform in the vertical direction can be guided in an auxiliary mode by means of the vertical guide rod, and the smoothness and the stability of the reciprocating movement of the supporting platform in the vertical direction driven by the vertical motor are improved.

In the embodiment, no matter the horizontal adjusting unit or the height adjusting unit is driven by the motor, the position of the supporting platform along the horizontal direction and the vertical height direction is adjusted by using a screw mechanism formed by a screw rod and a nut, and similarly, in other embodiments, the spatial position of the supporting platform can be adjusted horizontally and vertically by adopting a structural form of a guide rail sliding block.

As shown in fig. 4, the laser marking unit 5 in the present embodiment includes a laser marking machine 51, a distance measuring sensor 52, and a mounting board 53. The laser marking machine 51 and the distance measuring sensor 52 are both mounted on the same surface of the mounting plate 53 and are respectively used for marking operation and distance measuring positioning. At the moment, the positions of the laser marking machine and the ranging sensor are uniformly adjusted through the mounting plate, so that the spatial position of the laser marking machine can be accurately obtained according to the measurement data of the ranging sensor. In addition, be equipped with three range finding sensor 52 on the mounting panel 53 of this embodiment to distribute in three corner position, thereby detect through the range finding to a plurality of positions, acquire more accurate and comprehensive data, improve the precision to laser marking machine position adjustment.

As shown in connection with fig. 4, the laser marking unit 5 further includes a fixed frame 54, a flipping frame 55, and a first flipping motor 56. Wherein the fixed frame 54 is directly and fixedly connected with the connecting frame 25 in the swing unit 2, the first tilting motor 56 is fixedly connected with the fixed frame 54, the tilting frame 55 is positioned in the fixed frame 54 and connected with the output shaft of the first tilting motor 56, and the mounting plate 53 is fixed in the tilting frame 55.

At this moment, just can drive the upset frame through the reciprocating rotation of output shaft in the first upset motor and carry out reciprocal upset in fixed frame to drive the mounting panel and go and overturn, realize the fine setting to laser marking machine orientation and range finding sensor orientation on the mounting panel.

Further, as shown in fig. 4, a second flipping motor 57 is further provided in the laser marking unit 5. The second flipping motor 57 is fixed on the flipping frame 55, the mounting plate 53 is fixedly connected with the output shaft of the second flipping motor 57, and the output shaft of the first flipping motor 56 is in a perpendicular relationship with the output shaft of the second flipping motor 57. Like this, utilize the second upset motor just can carry out the independent upset drive to the mounting panel to laser marking machine orientation and range finding sensor orientation on the mounting panel carry out the fine setting of another direction.

Wherein, in this embodiment, first upset motor and second upset motor all adopt conventional motor to be connected with upset frame and mounting panel with the help of the gear train respectively, and drive upset frame and mounting panel respectively and carry out the upset control of two directions. Similarly, in other embodiments, the first and second flipping motors may also be stepper motors, or even directly connected to and flipping over the flipping frame and the mounting plate, respectively.

Referring to fig. 1 to 5, when the laser marking device of the present embodiment is used to mark the side surface of a conventional trapezoidal metal ingot, the specific process is as follows:

in the first step, the swing motor 21 is controlled to rotate, and the laser marking unit 5 is swung to the rightmost position of the third link 24, so that the mounting plate 53 in the laser marking unit 5 is positioned above the upper surface 61 of the metal ingot.

Secondly, the distances between the three distance measuring sensors 52 on the mounting plate 53 and the upper surface 61 in the metal ingot are respectively obtained, and the distance between the laser marking machine 51 and the upper surface 61 in the metal ingot is determined by an average value calculation method, so that the space position of the metal ingot is positioned.

The layout positions of the three distance measuring sensors can be adjusted according to the surface size of the metal ingot, so that the distances among the three distance measuring sensors correspond to the surface size of the metal ingot, and the data acquired by the three distance measuring sensors can determine whether the laser marking machine corresponds to the surface of the metal ingot. For example, when the data obtained by the three distance measuring sensors are almost equal, it can be inferred that the three distance measuring sensors are all located above the surface of the metal ingot, that is, the laser marking machine corresponds to the surface of the metal ingot, whereas when the data obtained by the three distance measuring sensors are very different, it is possible that one of the distance measuring sensors is not located above the surface of the metal ingot, and at this time, the spatial position of the laser marking unit needs to be adjusted, so that the three distance measuring sensors are all located above the surface of the metal ingot, that is, the laser marking machine corresponds to the surface of the metal ingot, and then the distance between the laser marking machine and the surface of the metal ingot is adjusted, so as to improve the positioning accuracy of the spatial position of the metal ingot.

And a third step of controlling the swing motor 21 to rotate after the positioning of the position of the upper surface 61 in the metal ingot is completed, swinging the laser marking unit 5 to the leftmost position of the third connecting rod 24, and moving the mounting plate 53 in the laser marking unit 5 to a position corresponding to the middle side surface 62 of the metal ingot.

In a fourth step, a marking operation of the side surface 62 of the ingot is performed. Before marking, the distances to the side surface 62 of the metal ingot can be respectively obtained by three distance measuring sensors 52 on the mounting plate 53, and the distance between the laser marking machine 51 and the side surface 62 of the metal ingot can be checked by an averaging calculation method. If the measured data of the three distance measuring sensors 52 show that the position of the laser marking machine 51 has deviation, the spatial position of the laser marking machine 51 can be rapidly adjusted through the horizontal adjusting unit 2 and the height adjusting unit 3, the orientation of the laser marking machine 51 is finely adjusted through the first overturning motor 56 and the second overturning motor 57, the laser marking machine 51 is adjusted to the optimal marking position, and marking accuracy of the side surface 62 in the metal ingot is guaranteed.

Thus, the spatial positioning of the upper surface of the metal ingot is completed, the precise marking operation of the middle side surface of the metal ingot is performed by taking the spatial positioning as a reference, and the precise marking operation of the middle side surfaces of other metal ingots can be sequentially completed.

Similarly, in other embodiments, if it is desired to perform marking operation on the upper surface and the side surface of the metal ingot at the same time, after the second step of positioning the upper surface of the metal ingot is completed, the orientation of the laser marking machine 51 can be precisely adjusted by controlling the first and

second turnover motors

56 and 57, and the laser marking machine 51 is adjusted to the optimal marking position, so as to start marking and complete marking operation on the upper surface 61 of the metal ingot, and then the swing motor 21 is controlled to rotate to perform positioning and marking operation on the side surface 62 of the metal ingot, thereby achieving accurate positioning and marking operation on the upper surface and the side surface of the metal ingot at the same time.

Claims

1. A laser marking device is characterized by comprising a swinging unit, a horizontal adjusting unit, a height adjusting unit, a laser marking unit and a supporting platform; the laser marking device comprises a laser marking unit, a swinging unit, a supporting platform and a positioning unit, wherein the laser marking unit is internally provided with a laser marking machine and is connected with the swinging unit, the swinging unit is positioned on the supporting platform and drives the laser marking unit to swing back and forth in a vertical plane by taking the supporting platform as a reference, and the laser marking unit is positioned on different surfaces of a metal ingot block; the supporting platform is simultaneously connected with the horizontal adjusting unit and the height adjusting unit through a horizontal plate, and the horizontal position and the height position are adjusted under the driving of the horizontal adjusting unit and the height adjusting unit;

the laser marking unit comprises a distance measuring sensor and a mounting plate; the mounting plate is fixedly connected with the swinging unit, and the laser marking machine and the ranging sensor are mounted on the surface of the mounting plate and are respectively used for marking and ranging positioning;

the laser marking unit also comprises a fixed frame, a turning frame and a first turning motor; the fixed frame is directly and fixedly connected with the swing unit, the first overturning motor is fixedly connected with the fixed frame, the overturning frame is positioned in the fixed frame and connected with an output shaft of the first overturning motor, the overturning frame rotates in a reciprocating manner along with the output shaft of the first overturning motor, and the mounting plate is fixed in the overturning frame and synchronously overturns along with the overturning frame;

the swing unit comprises a swing motor, a first connecting rod, a second connecting rod, a third connecting rod and a connecting frame; the swing motor is fixed on the upper surface of the supporting platform, one end of the first connecting rod is fixedly connected with the output end of the swing motor, the other end of the first connecting rod is hinged with one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected with the connecting frame; one end of the third connecting rod is hinged with the upper surface of the supporting platform, and the other end of the third connecting rod is fixedly connected with the connecting frame; the connecting frame is a deformable square frame structure and is formed by sequentially connecting a plurality of parallelogram frames which are arranged in parallel along the vertical direction through a plurality of horizontal connecting rods; the second connecting rod, the third connecting rod and the laser marking unit are respectively and fixedly connected with three edges in the connecting frame, and the third connecting rod and the laser marking unit are fixedly connected with two parallel edges.

2. The laser marking device according to claim 1, wherein the swing unit further comprises a left stopper and a right stopper; the left limiting block and the right limiting block are both located on the upper surface of the supporting platform and located on two sides of the third connecting rod respectively, and are used for limiting the limit position of the third connecting rod in reciprocating swing.

3. The laser marking device according to claim 1, wherein the level adjustment unit includes a level motor, a level screw, and a level screw nut; the horizontal screw rod is fixed in the area below the supporting platform along the horizontal direction, the horizontal screw rod nut is fixed on the lower surface of the supporting platform and sleeved on the horizontal screw rod, and an output shaft of the horizontal motor is connected with one end of the horizontal screw rod to drive the horizontal screw rod to rotate in a reciprocating mode.

4. The laser marking device according to claim 3, wherein the level adjustment unit further includes a level guide rod and a level guide block; the horizontal guide rod is positioned in the lower area of the supporting platform and is parallel to the horizontal lead screw, and the horizontal guide block is fixed on the lower surface of the supporting platform, sleeved on the horizontal guide rod and capable of sliding in a reciprocating mode in the horizontal direction.

5. The laser marking device according to claim 1, wherein the height adjustment unit comprises a vertical motor, a vertical lead screw, and a vertical lead screw nut; the vertical screw rod is fixed in a one-side area of the supporting platform along the vertical direction, the vertical screw rod nut is fixedly connected with the horizontal plate and sleeved on the vertical screw rod, and an output shaft of the vertical motor is connected with one end of the vertical screw rod to drive the vertical screw rod to rotate in a reciprocating mode.

6. The laser marking device according to claim 5, wherein the height adjustment unit further comprises a vertical guide rod; the vertical guide rod is fixed on one side area of the supporting platform along the vertical direction, and the horizontal plate is connected with the vertical guide rod in a sliding mode and can slide relatively along the vertical direction.

7. The laser marking device according to claim 1, wherein the laser marking unit further comprises a second flipping motor; the second turnover motor is fixed on the turnover frame, the mounting plate is fixedly connected with an output shaft of the second turnover motor, and an output shaft of the first turnover motor is perpendicular to an output shaft of the second turnover motor.