CN220971096U

CN220971096U - Paraxial laser engraving machine

Info

Publication number: CN220971096U
Application number: CN202322701880.2U
Authority: CN
Inventors: 李二明
Original assignee: Henan Huazhu Intelligent Equipment Co ltd
Current assignee: Henan Huazhu Intelligent Equipment Co ltd
Priority date: 2023-10-09
Filing date: 2023-10-09
Publication date: 2024-05-17
Anticipated expiration: 2033-10-09

Abstract

The utility model relates to the technical field of laser engraving, in particular to a paraxial laser engraving machine, which comprises a laser engraving mechanism and an imaging mechanism, wherein the imaging mechanism is used for collecting images of a workpiece so as to position the workpiece, the laser engraving mechanism is used for laser engraving processing the workpiece, the projection of the imaging mechanism at a workpiece placement position and the projection of a field lens of the laser engraving mechanism at the workpiece placement position have a first offset distance, and the imaging mechanism collects the images of the workpiece placement position when the laser mechanism does not work; the paraxial laser engraving machine further comprises a device shifting mechanism, a height gauge, a workpiece shifting mechanism and a control mechanism, the workpiece shifting mechanism drives the workpiece to move and align under the control of the control mechanism, the device shifting mechanism drives the laser engraving mechanism to approach or depart from the workpiece, the height gauge detects the distance between the laser engraving mechanism and the workpiece, and finally automatic laser engraving processing of the workpiece is realized.

Description

Paraxial laser engraving machine

Technical Field

The utility model relates to the technical field of laser engraving, in particular to a paraxial laser engraving machine.

Background

A laser engraving machine is a device for engraving and cutting by using a laser technology. The high-energy laser beam is used for focusing heat energy on the surface of a material, accurate scribing and cutting are realized by controlling the path and energy of the laser beam, generally, the laser engraving machine has wider application range, higher engraving precision and faster engraving speed, but most of the existing laser engraving machines still need manual operation at present, and the error rate of workpiece processing is higher.

The patent with the bulletin number of CN216680732U discloses a 2D vibrating mirror relief carving machine which comprises a machine cabinet frame, an optical platform arranged above the machine cabinet frame and a Z-axis lifting device arranged on the optical platform, wherein a control device and a display device are arranged in the machine cabinet frame; the laser device comprises a Z-axis lifting device, a Z-axis laser generator, a 2D laser galvanometer device and a laser oscillator, wherein the Z-axis lifting device is connected with the Z-axis laser generator; the laser generator and the display are respectively connected with the control device, and the laser output of the laser generator is connected with the 2D laser galvanometer device. This 2D shakes mirror relief (sculpture) engraver needs to operate through the manual work, and is higher to operating personnel's technical requirement.

Disclosure of utility model

The utility model aims to solve the technical problem of providing a paraxial laser engraving machine, wherein the imaging position of an imaging mechanism is not coincident with the laser position of the laser engraving mechanism, so that the paraxial processing of a workpiece is realized, the imaging mechanism collects the image of the workpiece when the laser mechanism does not emit laser, and the light captured by the imaging camera does not pass through a galvanometer and a field lens, so that the imaging range is large, the quality is high, and the imaging machine can be used for automatically identifying the workpiece.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a paraxial laser engraving machine, includes laser engraving mechanism and imaging mechanism, laser engraving mechanism includes laser mechanism, shakes mirror and field lens, shakes the mirror setting and send end one side and reflect the pulse laser that laser mechanism sent at laser mechanism's laser, and the field lens setting is in the one side of shakes mirror outgoing light and focus the laser that shakes the mirror reflection to work piece place, and imaging mechanism sets up one side of field lens and gathers the image of work piece place at laser mechanism unoperated time, and imaging mechanism has first offset distance at the projection of work piece place with the projection of field lens at work piece place.

The imaging mechanism is used for positioning the workpiece when the laser engraving mechanism does not work, the imaging focus of the imaging mechanism is not coaxial with the processing focus of the laser engraving mechanism, and illumination light captured by the imaging mechanism during imaging does not pass through the galvanometer and the field lens, so that the imaging mechanism has the advantages of good lighting and clear imaging, is more beneficial to being used in combination with automatic control equipment, and effectively facilitates the laser engraving processing work of the workpiece.

Further, the imaging mechanism comprises an imaging light source and an imaging camera, wherein the imaging light source is an annular light source and is provided with a workpiece avoiding hole, and the imaging camera is arranged above the imaging camera and collects images of a workpiece placing position.

The imaging light source is an annular light source and is provided with a workpiece avoiding hole, the imaging light source can fully illuminate the workpiece, so that the imaging camera can acquire clearer and comprehensive images, the positioning precision and convenience of the workpiece are effectively improved, and the imaging light source has a great effect on the precision and efficiency of laser engraving processing.

Further, still include equipment shift mechanism, equipment shift mechanism includes first driving piece and mounting base, and mounting base sets up at the action end of first driving piece and is driven by first driving piece and remove along the direction of perpendicular work piece place, and laser engraving mechanism and imaging mechanism are all installed on mounting base.

The equipment shifting mechanism is used for driving the laser engraving mechanism and the imaging mechanism to move, and the positions of the laser engraving mechanism and the imaging mechanism are adjusted in the machining depth direction.

Furthermore, the mounting base is also provided with a height indicator, the projection of the height indicator on the workpiece placement position and the projection of the imaging light source on the workpiece placement position have a second offset distance, and the projection of the height indicator on the workpiece placement position and the projection of the field lens on the workpiece placement position have a third offset distance.

The height gauge is used for measuring the distance between the laser engraving mechanism and the imaging mechanism and the workpiece, not only can the distance between the workpiece and the laser engraving mechanism be adjusted more accurately, but also the processing progress can be monitored in the reprocessing process, and the phenomena that the workpiece is placed in a wrong height or the processing is continued after the processing is wrong, so that equipment is damaged and the like are avoided.

Further, the workpiece shifting mechanism comprises a second driving piece and a third driving piece,

The workpiece placement position is set at the action end of the second driving piece and the second driving piece is set at the action end of the third driving piece, or the workpiece placement position is set at the action end of the third driving piece and the third driving piece is set at the action end of the second driving piece.

The workpiece shifting mechanism comprises a second driving piece and a third driving piece, and the second driving piece and the third driving piece are in linkage fit to realize accurate adjustment of the workpiece position.

Further, the device also comprises a control mechanism, wherein the laser mechanism, the imaging light source, the imaging camera, the first driving piece, the altimeter, the second driving piece and the third driving piece are electrically connected with the control mechanism.

The control mechanism is connected with the laser engraving mechanism, the imaging mechanism, the altimeter, the equipment shifting mechanism and each part of the workpiece shifting mechanism, and controls the movement of each part to realize automatic engraving processing of the workpiece.

Compared with the prior art, the utility model has the following beneficial effects:

1. The projection of the imaging mechanism at the workpiece placement position and the projection of the field lens at the workpiece placement position have a first offset distance, namely the imaging center of the imaging mechanism is not overlapped with the processing center of the laser engraving mechanism, and a paraxial laser engraving device is adopted, so that the imaging mechanism captures illumination light of an image without passing through the vibrating lens and the field lens, the visual field range of the imaging mechanism is large, the imaging quality is high, the recognition degree of the workpiece is more accurate, and the processing precision of the laser engraving mechanism on the workpiece is further effectively improved;

2. When the laser engraving mechanism does not work, the position of the workpiece is adjusted according to the image shot by the imaging mechanism, so that the damage of the laser to the components of the imaging mechanism is avoided; the light source of the imaging mechanism is an annular light source provided with a workpiece avoiding hole, so that the shooting effect on the workpiece is improved, and the machining precision of the workpiece is ensured;

3. The height gauge not only can assist in adjusting the position between the processing point of the workpiece and the processing focus of the laser engraving mechanism, but also can detect the processing condition before or during laser processing, and when detecting that the error of a certain processing value of the workpiece is larger than the error value preset by the control mechanism, the height gauge immediately gives an alarm to the control mechanism to stop processing, so that the situation that the workpiece is placed incorrectly or the workpiece blank is still continuously processed due to the height error is prevented;

4. The control mechanism is connected with the laser engraving mechanism, the imaging mechanism, the altimeter, the equipment shifting mechanism and each part of the workpiece shifting mechanism, and the control mechanism is used for controlling each laser engraving mechanism, the imaging mechanism, the equipment shifting mechanism, the workpiece shifting mechanism and the like, so that the automatic engraving processing of a single workpiece or a plurality of workpieces in the same batch can be realized.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a paraxial laser engraving machine;

FIG. 2 is a schematic diagram of a paraxial laser engraving machine with a base and an industrial personal computer omitted;

FIG. 3 is a schematic diagram of the structure of the laser engraving mechanism and the imaging mechanism;

In the figure: 1. the device comprises a laser mechanism, 2, a vibrating mirror, 3, a field lens, 4, an imaging light source, 5, an imaging camera, 6, a altimeter, 7, a first driving piece, 8, a second driving piece, 9, a third driving piece, 10 and a control mechanism.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a paraxial engraving machine which is used for solving the technical problem of high machining error rate caused by manually adjusting a vibrating mirror when the paraxial engraving machine is used for machining polycrystalline diamond and other materials.

As shown in fig. 1-3, a paraxial laser engraving machine comprises a laser engraving mechanism and an imaging mechanism, wherein the laser engraving mechanism comprises a laser mechanism 1, a vibrating mirror 2 and a field lens 3, the vibrating mirror 2 is arranged on one side of a laser emitting end of the laser mechanism 1 and reflects pulse laser emitted by the laser mechanism 1, the field lens 3 is arranged on one side of emergent light of the vibrating mirror 2 and focuses laser reflected by the vibrating mirror 2 to a workpiece placing position, the imaging mechanism is arranged on one side of the field lens 3 and collects images of the workpiece placing position when the laser mechanism 1 does not work, and projection of the imaging mechanism on the workpiece placing position and projection of the field lens 3 on the workpiece placing position have a first offset distance.

Specifically, a paraxial laser engraving machine mainly includes laser engraving mechanism and imaging mechanism, and imaging mechanism is used for gathering the position of work piece, and imaging mechanism can make things convenient for the operator to counterpoint the work piece to be suitable for by the carved position of laser engraving mechanism, and laser engraving mechanism is used for carrying out laser engraving to the work piece after the location. The paraxial laser engraving machine of this embodiment is mainly used for processing superhard materials such as polycrystalline diamond, and for convenience of description, in this embodiment, the workpiece is referred to as polycrystalline diamond or other materials or workpieces suitable for laser engraving by the paraxial laser engraving machine of this embodiment.

The laser engraving mechanism comprises a laser mechanism 1, a vibrating mirror 2 and a field lens 3, wherein the laser mechanism 1 is a laser emitter or other type of equipment for emitting laser, the vibrating mirror 2 is arranged on one side of a laser emitting end of the laser mechanism 1, and the laser emitted by the laser mechanism 1 is emitted to the vibrating mirror 2 and reflected to the field lens 3 by the vibrating mirror 2. The field lens 3 is arranged on one side of the outgoing light of the vibrating mirror 2, the field lens 3 focuses and projects laser reflected by the vibrating mirror 2 to a workpiece placement position, and laser emitted by the laser mechanism 1 sequentially passes through the reflection of the vibrating mirror 2 and the focusing of the field lens 3 to finally carry out laser engraving on a workpiece at the workpiece placement position.

The imaging mechanism is arranged at one side of the field lens 3 and collects images of a workpiece placement position, the projection of the imaging mechanism at the workpiece placement position and the projection of the field lens 3 at the workpiece placement position have a first offset distance, the projection of the imaging focus of the imaging mechanism and the projection of the processing focus of the laser engraving mechanism at the workpiece placement position have a first offset distance, and the imaging focus of the imaging mechanism is not coincident (paraxial) with the processing focus of the laser engraving mechanism, and the imaging mechanism collects captured light when imaging and does not pass through the galvanometer and the field lens of the laser engraving mechanism, so that the imaging range of the imaging mechanism is larger, the imaging quality is higher, and the recognition of the workpiece is facilitated; meanwhile, the image with large range and high quality is more favorable for being collected by a control mechanism or other automatic control devices to realize automatic laser engraving processing.

The processing focus of the laser engraving mechanism is the focus of the field lens 3 focusing laser to the workpiece placement position, the position of the workpiece on the workpiece placement position is adjusted under the cooperation of the imaging mechanism, the processing point of the workpiece is coaxial with the imaging focus of the imaging mechanism, then the processing focus of the laser engraving mechanism and the processing point of the workpiece can be coaxial by moving the laser engraving mechanism by a first offset distance, and at the moment, the laser engraving mechanism can accurately process the processing point of the workpiece by moving and adjusting along the direction perpendicular to the workpiece placement position.

It should be noted that, in the present disclosure, the first offset distance, the second offset distance, and the third offset distance are all distances having directional directionality, for example, the first offset distance specifically refers to a connection line direction between a projection point of an imaging focal point of the imaging mechanism at a workpiece placement position and a projection point of a processing focal point of the laser engraving mechanism at the workpiece placement position, a distance between the imaging focal point of the imaging mechanism and a projection of the processing focal point of the laser engraving mechanism at the workpiece placement position, and the moving of the laser engraving mechanism by the first offset distance specifically refers to a length distance that the laser engraving mechanism moves by the first offset distance along a direction indicated by the first offset distance.

Because the intensity of the laser is too high, when the laser emitted by the laser mechanism 1 is used for engraving the surface of the workpiece, the imaging mechanism cannot collect the image of the surface of the workpiece, and the optical element of the imaging mechanism can be damaged when the imaging mechanism is serious, so that the imaging mechanism only collects the image of the place where the workpiece is placed when the laser mechanism 1 is not used for emitting the laser.

When the paraxial laser engraving machine of the embodiment is used for machining a workpiece, the workpiece is firstly placed on a workpiece placing position, the workpiece is observed by the imaging mechanism, the position of the workpiece or the position of the imaging mechanism is adjusted, the imaging focal point of the imaging mechanism is coaxial with the machining point of the workpiece, after the workpiece is fixed, the imaging mechanism and the laser engraving mechanism move a first offset distance, at the moment, the machining focal point of the laser engraving mechanism is coaxial with the machining point of the workpiece, and the laser engraving mechanism moves along the direction perpendicular to the workpiece placing position and engraves the workpiece by taking the machining point of the workpiece as a reference.

Because the projection of imaging mechanism at work piece place and the projection of field lens 3 at work piece place have first offset distance, imaging mechanism is located the lateral part of laser engraving mechanism's processing position, imaging mechanism's field of vision scope is big, daylighting is good, and then makes imaging mechanism gather the image can be clearer, establishes the in-process at automatic laser engraving, and more clear image is discerned more easily at laser engraving in-process to manual operation has been reduced.

The imaging mechanism comprises an imaging light source 4 and an imaging camera 5, wherein the imaging light source 4 is an annular light source, the imaging light source 4 is provided with a workpiece avoiding hole, and the imaging camera 5 is arranged on the imaging light source 4 and collects images of a workpiece placing position.

Specifically, referring to fig. 1 to 3, the imaging mechanism includes an imaging light source 4 and an imaging camera 5, the imaging light source 4 emits illumination light to a workpiece placement position, the imaging camera 5 photographs a workpiece at the workpiece placement position, and the imaging camera 5 collects illumination light reflected by the workpiece and forms an image. The imaging light source 4 is an annular light source, a workpiece avoiding hole is formed in the annular light source, the specification of the workpiece avoiding hole is at least enough for enabling a clamp used for clamping a workpiece at a workpiece placing position to pass through, and the illuminating part of the annular light source is used for encircling the workpiece to avoid hole distribution so as to fully illuminate the workpiece, so that the shooting effect of the imaging camera 5 is prevented from being influenced by dim light, and the machining precision is further influenced.

As a further embodiment, the paraxial laser engraving machine further comprises an equipment shifting mechanism, the equipment shifting mechanism comprises a first driving piece 7 and a mounting base, the mounting base is arranged at the action end of the first driving piece 7 and is driven by the first driving piece 7 to move along the direction perpendicular to the workpiece placement position, and the laser engraving mechanism and the imaging mechanism are both arranged on the mounting base.

Specifically, referring to fig. 1 to 3, when a workpiece is subjected to laser engraving, a distance from the laser engraving mechanism to the workpiece needs to be moved to adjust the engraving depth, and a relative position between the imaging mechanism and the laser engraving mechanism is determined, so that the laser engraving mechanism and the imaging mechanism synchronously perform movement adjustment in the laser engraving process. For the equipment shift mechanism is used for realizing the accurate regulation to laser engraving mechanism and imaging mechanism, and equipment shift mechanism includes first driving piece 7 and mounting base, and first driving piece 7 is servo linear motor or servo motor driven linear motion parts such as ball, and the action end of first driving piece 7 is provided with mounting base, under the drive of first driving piece 7, and mounting base moves along the direction of perpendicular and work piece place, and laser engraving mechanism and imaging mechanism all install on mounting base and are close to or work piece place by first driving piece 7 drive.

In some embodiments, the mounting base is further provided with a height gauge 6, where the projection of the height gauge 6 at the workpiece placement position has a second offset distance from the projection of the imaging light source 4 at the workpiece placement position, and the projection of the height gauge 6 at the workpiece placement position has a third offset distance from the projection of the field lens 3 at the workpiece placement position.

Specifically, the altimeter 6 is disposed on the mounting base, the measuring end of the altimeter 6 faces the workpiece placement position, the altimeter 6 is used for measuring the distance between the altimeter 6 and the workpiece placement position or the distance between the altimeter 6 and the workpiece placement position, the projection of the altimeter 6 on the workpiece placement position and the projection of the imaging light source 4 on the workpiece placement position have a second offset distance, and the projection of the altimeter 6 on the workpiece placement position and the projection of the field lens 3 on the workpiece placement position have a third offset distance. In the direction of the vertical mounting position, there is a first height difference between the altimeter 6 and the imaging light source 4, and there is a second height difference between the altimeter 6 and the field lens 3. The relative positional relationship among the altimeter 6, the imaging light source 4 and the field lens 3 is determined, and when the position of one of them is determined, the other two accurate positions can be obtained according to the relative positions determined among the three.

When the workpiece is subjected to laser engraving, the workpiece is placed on a workpiece placement position, the workpiece is observed by utilizing the imaging mechanism, the position of the workpiece is adjusted, the processing point of the workpiece is coaxial with the imaging focus of the imaging mechanism, after the workpiece is fixed, the mounting base moves a second offset distance relative to the processing point of the workpiece, the measuring end of the altimeter 6 is coaxial with the processing point of the workpiece, the altimeter 6 measures the distance relative to the processing point of the workpiece, the processing height difference between the processing focus of the laser engraving mechanism and the processing point of the workpiece is obtained through conversion of the second height difference, then the mounting base moves a third offset distance relative to the processing point of the workpiece, the processing focus of the laser engraving mechanism is coaxial with the processing point of the workpiece, and the first driving piece 7 is used for driving the mounting base to move by referring to the processing height difference, so that the laser engraving mechanism engraves the workpiece by taking the processing point of the workpiece as a reference.

As a further embodiment, the paraxial laser engraving machine further comprises a workpiece displacement mechanism comprising a second driving member 8 and a third driving member 9, wherein the workpiece placement position is provided at the action end of the second driving member 8 and the second driving member 8 is provided at the action end of the third driving member 9, or wherein the workpiece placement position is provided at the action end of the third driving member 9 and the third driving member 9 is provided at the action end of the second driving member 8.

Specifically, referring to fig. 1-3, the workpiece shifting mechanism is configured to drive the workpiece placement position to move, and further drive the workpiece to move, and to implement laser engraving processing on the workpiece in cooperation with the movement adjustment of the laser engraving mechanism, the imaging mechanism, and the altimeter 6 by the equipment shifting mechanism. The second driving element 8 and the third driving element 9 are linear motion components such as a servo linear motor or a ball screw driven by the servo motor, the motion direction of the motion end of the second driving element 8 is perpendicular to the motion direction of the motion end of the third driving element 9, the motion direction of the motion end of the second driving element 8 and the motion direction of the motion end of the third driving element 9 are perpendicular to the motion direction of the motion end of the first driving element 7, for convenience of description and understanding, the motion direction of the motion end of the first driving element 7 is defined as a Z axis, the motion direction of the motion end of the second driving element 8 is defined as an X axis, the motion direction of the motion end of the third driving element 9 is defined as a Y axis, and an X-Y-Z three-dimensional coordinate system is established according to the Z axis, the X axis and the Y axis which are perpendicular to each other.

In some embodiments, the second driving member 8 is disposed at an action end of the third driving member 9 and the action end of the second driving member 8 is provided with a jig table, in other embodiments, the third driving member 9 is disposed at the action end of the second driving member 8 and the action end of the third driving member 9 is provided with a jig table, an upper table surface of the jig table is perpendicular to the Z axis, the upper table surface of the jig table is a workpiece placement position, and the upper table surface of the jig table is provided with a special jig for fixing a workpiece. The second driving piece 8 and the third driving piece 9 are in linkage fit to drive the workpiece placing position to be in an X-Y plane for conveniently operating the imaging mechanism, the altimeter 6 and the laser engraving mechanism on the workpiece respectively, and the workpiece placing position is of a platform structure.

When the workpiece is subjected to laser engraving, the workpiece is fixed at a special fixture of a workpiece placement position, the second driving piece 8 and the third driving piece 9 are matched to drive the workpiece to move to a position corresponding to an imaging mechanism, the imaging mechanism is utilized to determine a processing point of the workpiece, and the second driving piece 8 and the third driving piece 9 are matched to drive the workpiece to move so that the processing point of the workpiece is coaxial with an imaging focus of the imaging mechanism; then the second driving piece 8 and the third driving piece 9 drive the workpiece to move a second offset distance, so that the measuring end of the altimeter 6 is coaxial with the processing point of the workpiece, the altimeter 6 measures the distance between the altimeter 6 and the processing point of the workpiece, namely the distance between the measuring meter and the processing point of the workpiece in the Z axis, and the processing height difference between the processing focus of the laser engraving mechanism and the processing point of the workpiece is obtained through conversion of the second height difference; then the second driving piece 8 and the third driving piece 9 drive the workpiece to move a third offset distance, so that the processing focus of the laser engraving mechanism is coaxial with the processing point of the workpiece, and the first driving piece 7 is used for driving the mounting base to move by referring to the processing height difference value, so that the laser engraving mechanism takes the processing point of the workpiece as a reference to engrave the workpiece.

In general, in order to facilitate placement, movement and fixing of a workpiece during laser engraving, and in order to facilitate laser engraving of the workpiece, an X-Y plane generally refers to a horizontal plane, and a Z-axis generally refers to a vertical direction. The field lens 3 is positioned above the workpiece placement position, the vibrating mirror 2 is arranged above the field lens 3, and the field lens 3 focuses the laser reflected by the vibrating mirror 2 downwards to the workpiece placement position; the imaging camera 5 and the altimeter 6 are also arranged above the workpiece placing position, and the Z-axis driving piece drives the laser engraving mechanism and the imaging mechanism to move up and down.

In order to realize automatic laser engraving of the workpiece, the paraxial laser engraving machine of this embodiment further includes a control mechanism 10, and the laser mechanism 1, the imaging light source 4, the imaging camera 5, the first driving member 7, the altimeter 6, the second driving member 8, and the third driving member 9 are all electrically connected with the control mechanism 10.

Specifically, the control mechanism 10 is an industrial personal computer or other control equipment, the control mechanism 10 is electrically connected with the laser mechanism 1 and controls the laser mechanism 1 to emit laser, the control mechanism 10 is also electrically connected with the vibrating mirror 2 and the field lens 3, and the control mechanism 10 is provided with the vibrating mirror 2 and the field lens 3 and can receive data information fed back by the vibrating mirror 2 and the field lens 3; the laser mechanism 1 is electrically connected with the imaging light source 4 and controls the imaging light source 4 to emit illumination light; the control mechanism 10 is electrically connected with the altimeter 6, and the control mechanism 10 controls the altimeter 6 to measure and receive measurement data of the altimeter 6; the control mechanism 10 is electrically connected with the imaging motor, and the control mechanism 10 controls the imaging camera 5 to shoot images of the workpiece placement position and receives image data shot by the imaging camera 5; the control mechanism 10 is electrically connected with the first driving piece 7, the second driving piece 8 and the third driving piece 9, and the control mechanism 10 respectively controls the first driving piece 7, the second driving piece 8 and the third driving piece 9 to operate according to a built-in program and data received from the imaging camera 5 and the altimeter 6, so that automatic laser engraving of workpieces is realized.

The paraxial laser engraving machine of the embodiment can realize automatic engraving processing of a single workpiece and automatic continuous engraving processing of a plurality of workpieces. The automatic continuous engraving processing flow of a plurality of workpieces comprises the following steps:

1. A plurality of workpieces are respectively fixed on a workpiece placement position by using a clamp, the vibrating mirror 2 and the field mirror 3 perform plane scanning on the workpiece processing positions and transmit scanning information to the control mechanism 10, and the control mechanism 10 records the placement positions of the workpieces; then the imaging camera 5 shoots the workpiece placement position, records the offset distance between each workpiece and the imaging camera 5, and simultaneously records the offset distance between each workpiece and the processing focus of the laser engraving mechanism under the identification of the imaging camera 5, and the control mechanism 10 receives the data recorded by the imaging camera 5;

2. According to the placement position of the workpiece, the control mechanism 10 controls the second driving piece 8 and the third driving piece 9 to drive the workpiece to move by a third offset distance, so that the workpiece is positioned below the altimeter 6, the altimeter 6 measures the distance between the altimeter 6 and the workpiece, and processing measurement data is sent to the control mechanism 10; the control mechanism 10 controls the second driving piece 8 and the third driving piece 9 to drive the workpiece to move by a second offset distance, so that the workpiece moves below the imaging camera 5, the imaging camera 5 shoots an image of the workpiece and records three or four points of the edge of the upper surface of the workpiece, and the control mechanism 10 analyzes and calculates the center point of the workpiece according to the image shot by the imaging camera 5, so that the processing point of the workpiece is obtained; then the control mechanism 10 controls the second driving piece 8 and the third driving piece 9 to drive the workpiece to move by a first offset distance, the workpiece moves to the position below the field lens 3, and at the moment, the processing point of the workpiece and the processing focus of the laser engraving mechanism are in a coaxial state;

3. According to the distance between the altimeter 6 and the workpiece, the second height difference between the altimeter 6 and the field lens 3 and the parameters of the field lens 3, which are measured by the altimeter 6, the control mechanism 10 controls the Z-axis driving piece to drive the laser engraving mechanism and the imaging mechanism to move up and down along the Z axis, so that the processing focus of the laser engraving mechanism coincides with the processing point of the workpiece; then the laser mechanism 1 emits laser to the vibrating mirror 2 during laser engraving, the vibrating mirror 2 focuses the laser to a processing point of a workpiece, and the control mechanism 10 controls the workpiece shifting mechanism and the equipment shifting mechanism to realize the laser engraving processing of the workpiece according to a built-in program and processing requirements; the altimeter 6 continuously detects in the laser engraving process, when the altimeter 6 detects that the error of a certain processing value of a workpiece is larger than the error value preset by the control mechanism 10, the altimeter 6 transmits the detection result to the control mechanism 10, the control mechanism 10 alarms and stops, and the situation that the workpiece is placed in error or the processing height is wrong and still continues to be processed is prevented;

4. After one workpiece is subjected to laser engraving processing, the control mechanism 10 controls the workpiece shifting mechanism to drive the next workpiece to process according to the placement position of each workpiece collected in the first step, the offset distance between each workpiece and the imaging camera 5 and the offset distance between each workpiece and the processing focus of the laser engraving mechanism, and finally, automatic continuous engraving processing of a plurality of workpieces on the workpiece placement position is realized.

In the description of the present specification, reference to the terms "one embodiment," "example," "specific example," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. A paraxial laser engraving machine, characterized in that: including laser engraving mechanism and imaging mechanism, laser engraving mechanism includes laser mechanism (1), shakes mirror (2) and field lens (3), shakes mirror (2) setting and send end one side and reflect the pulse laser that laser mechanism (1) sent at the laser of laser mechanism (1), and field lens (3) set up in one side of shakes mirror (2) outgoing light and focus the laser that shakes mirror (2) reflection to work piece place position, imaging mechanism sets up one side of field lens (3) and gathers the image of work piece place position at laser mechanism (1) unoperated time, and imaging mechanism has first offset distance at the projection of work piece place position with the projection of field lens (3) at work piece place position.

2. The paraxial laser engraving machine of claim 1, wherein: the imaging mechanism comprises an imaging light source (4) and an imaging camera (5), wherein the imaging light source (4) is an annular light source, the imaging light source (4) is provided with a workpiece avoiding hole, and the imaging camera (5) is arranged above the imaging camera (5) and collects images of a workpiece placing position.

3. The paraxial laser engraving machine of claim 2, wherein: still include equipment shift mechanism, equipment shift mechanism includes first driving piece (7) and mounting base, and mounting base sets up the action end at first driving piece (7) and is moved along the direction that the vertical work piece was put the position by first driving piece (7) drive, and laser engraving mechanism and imaging mechanism all install on mounting base.

4. A paraxial laser engraving machine as defined in claim 3, wherein: the mounting base is also provided with a height indicator (6), the projection of the height indicator (6) at the workpiece placement position and the projection of the imaging light source (4) at the workpiece placement position have a second offset distance, and the projection of the height indicator (6) at the workpiece placement position and the projection of the field lens (3) at the workpiece placement position have a third offset distance.

5. The paraxial laser engraving machine of claim 4, wherein: also comprises a workpiece shifting mechanism, wherein the workpiece shifting mechanism comprises a second driving piece (8) and a third driving piece (9),

The workpiece placement position is arranged at the action end of the second driving piece (8) and the second driving piece (8) is arranged at the action end of the third driving piece (9), or the workpiece placement position is arranged at the action end of the third driving piece (9) and the third driving piece (9) is arranged at the action end of the second driving piece (8).

6. The paraxial laser engraving machine of claim 5, wherein: the device further comprises a control mechanism (10), and the laser mechanism (1), the imaging light source (4), the imaging camera (5), the first driving piece (7), the altimeter (6), the second driving piece (8) and the third driving piece (9) are electrically connected with the control mechanism (10).