Laser engraving preview auxiliary positioning device

Abstract

The utility model is suitable for the technical field of laser engraving, and provides a laser engraving preview auxiliary positioning device which comprises a laser emitting module, a square frame projection module, an angle detection module, a deflection movable support, a three-axis movement device, a storage unit, a power module and a controller. The laser emission module is used for laser engraving; the square frame projection module emits square frame projection to assist in positioning and limit the engraving movement range of the laser emission module; the angle detection module is used for detecting the horizontal deflection angle and the pitching deflection angle of the square frame projection module; the deflection movable bracket enables the square frame projection module to realize horizontal and pitching deflection; according to the minimum surrounding frame coordinate and the maximum carving area of the to-be-carved graph, the controller converts the to-be-carved graph coordinate in the square frame projection range according to the proportion; and the laser emission module is controlled to carry out laser engraving in the limited range of the square frame projection. According to the technology, the laser emission module can carry out laser engraving in the limited range of the square frame projection through the square frame projection.

Description

Technical Field

[0001] The present application relates to the technical field of laser engraving, and in particular to a laser engraving preview auxiliary positioning device. Background Art

[0002] When an existing desktop laser engraving machine is engraving, it is necessary to import the engraving picture into the laser engraving machine through the engraving software preprocessing end; during preprocessing, the engraving graphic coordinates of the picture on the canvas are based on the absolute coordinates of the canvas coordinate system, and the origin of the absolute coordinate system is at the lower left corner; when the absolute coordinates of the engraving graphic are imported into the desktop engraving machine for engraving, the engraving will be performed according to the zero point of the engraving machine as the origin and the absolute coordinates of the engraving graphic; if the engraving graphic on the canvas deviates from the maximum engraving area of ​​the engraving machine, the engraving head of the engraving machine will have an edge collision failure, so the current engraving machine needs to perform zero positioning and manual interactive edge patrol, that is, find the zero point manually or by collision limit, and locate the diagonal point of the picture at the engraving software preprocessing end, and perform a pre-motion check according to the maximum box path, so as to find possible edge collision failures in advance; the edge patrol movement of this manual interactive edge patrol function still requires movement time and requires users to monitor and observe; it is still inconvenient to use;

[0003] At the same time, this manual interactive edge patrol function is based on the absolute coordinates of the engraving image in the canvas coordinate system. Therefore, when the edge patrol is running, if there is a lot of blank space in the image to be engraved, it will cause engraving waste in the subsequent engraving process; for example, for an image with a side length of 12*12 cm, the engraving image in the middle has a side length of 4*4 cm, and the rest is blank; when performing manual interactive edge patrol, the area encircled by the edge patrol movement is 12*12 cm, but in the actual engraving process, the actual engraving area of ​​the engraving head of the engraving machine is 4*4 cm. It can be seen that the part outside the actual engraving image is prone to engraving waste;

[0004] In addition, when engraving multiple batches of graphics, it is necessary to arrange multiple spliced ​​graphics as closely as possible to improve the utilization rate of engraving materials. However, in the actual engraving process, when the user moves the engraved material, it is not easy to strictly divide the engraving boundary between the engraved graphics and the graphics to be engraved, and there is a lack of corresponding auxiliary positioning measures. Therefore, it is easy for the graphics to be engraved to overlap with the engraved graphics, causing losses; or it is easy for the engraved graphics to leave too much blank space between the engraved graphics and the engraved graphics, wasting engraving materials. Therefore, it is necessary to provide a laser engraving preview auxiliary positioning device to help users perform laser engraving preview auxiliary positioning. On the one hand, the preview auxiliary positioning function of the box projection is used to replace the manual interactive edge patrol function. On the other hand, the preview auxiliary positioning function of the box projection is used to assist in positioning and limit the engraving activity range of the laser emission module, thereby improving the utilization rate of laser engraving materials through sufficient stacking and arrangement. Utility Model Content

[0005] The purpose of the embodiment of the present application is to provide a laser engraving preview auxiliary positioning device, which is used for auxiliary positioning, limiting the engraving area and assisting in converting the engraving coordinates according to the box projection during the laser engraving preview.

[0006] The present application embodiment provides a laser engraving preview auxiliary positioning device, including:

[0007] A laser emission module emits laser for laser engraving the engraved surface;

[0008] A frame projection module emits a frame projection to assist in positioning and limit the engraving activity range of the laser emission module;

[0009] A deflection movable bracket, connected to the square frame projection module, used to enable the square frame projection module to achieve horizontal deflection and pitch deflection at a set height;

[0010] Angle detection module; the angle detection module is connected to the box projection module; the angle detection module is used to detect the horizontal deflection angle and the pitch deflection angle of the box projection module, and is used to assist in converting the engraving coordinates of the graphics to be engraved;

[0011] A three-axis motion device, used to drive the laser emitting module to move in the XY plane, and to drive the laser emitting module to rise and fall in the Z-axis direction; the three-axis motion device includes an X-axis motor, a Y-axis motor, an XY plane motion component, and a Z-axis lifting component;

[0012] The laser emission module is connected to the Z-axis lifting assembly; the Z-axis lifting assembly is connected to the XY plane motion assembly; the X-axis motor and the Y-axis motor are used to drive the XY plane motion assembly;

[0013] The XY plane motion component is used to drive the Z-axis lifting component and the laser emitting module to move on the XY plane; the Z-axis lifting component is used to adjust the lifting of the laser emitting module in the Z-axis direction;

[0014] A power module, the power module is used to supply power to the laser emission module, the frame projection module, the angle detection module, the X-axis motor and the Y-axis motor;

[0015] A storage unit, the storage unit is used to store the minimum bounding box coordinate data and size data of the pattern to be engraved, the maximum engraving area coordinate data and size data of the laser emission module, and the set height data of the box projection module;

[0016] A controller, electrically connected to the laser emission module, the frame projection module, the angle detection module, the X-axis motor, the Y-axis motor, the power module and the storage unit;

[0017] The controller converts the engraving coordinates of the figure to be engraved within the projection range of the box according to the minimum bounding box coordinate data of the figure to be engraved, the maximum engraving area coordinate data and the size data of the laser emission module in proportion; and controls the laser emission module to laser engrave the figure to be engraved within the limited range of the box projection according to the converted engraving coordinates.

[0018] Preferably, the frame projection module adopts a laser galvanometer module, or a transmission projection module, or a reflection projection module.

[0019] Preferably, the color of the frame projection includes color and monochrome.

[0020] Preferably, the frame projection module has a manual adjustment structure for horizontal deflection.

[0021] Preferably, the frame projection module has a manual adjustment structure for pitch and deflection.

[0022] Preferably, the deflection movable bracket has a lifting adjustment structure and a horizontal movement adjustment structure; the deflection movable bracket has a scale or manual lifting adjustment gear.

[0023] Preferably, the angle detection module adopts a three-axis acceleration sensor module or a three-axis gyroscope sensor module.

[0024] Furthermore, it also includes: a Z-axis motor; the Z-axis motor is connected to the Z-axis lifting assembly; the Z-axis motor is used to drive the Z-axis lifting assembly to enable the laser emitting module to be electrically lifted in the Z-axis direction.

[0025] Furthermore, it also includes: an operation and display module; the operation and display module is used to provide an operation and display interface for the user.

[0026] Furthermore, it also includes: a data transmission module; the data transmission module is used to receive the engraving coordinate data of the engraving figure.

[0027] Compared with the prior art, the beneficial effects of this application are:

[0028] 1. The laser engraving preview auxiliary positioning device proposed in the embodiment of the present application can emit a frame projection through a frame projection module to help the user to assist in positioning and limiting the maximum engraving area of ​​the laser emission module and assist in converting the engraving coordinates of the graphics to be engraved, and can achieve the basic corresponding effect that the frame selection indication area is the engraving limited area;

[0029] 2. A laser engraving preview auxiliary positioning device proposed in the embodiment of the present application can assist the user in projecting and positioning the area to be engraved, so as to know and adjust the position of the area to be engraved through the preview auxiliary positioning function of the box projection, so that the movement range of the engraving head and the box projection range do not exceed the maximum engraving area of ​​the engraving machine, thereby replacing the manual interactive edge patrol function;

[0030] 3. The laser engraving preview auxiliary positioning device proposed in the embodiment of the present application can assist the user to project and position the area to be engraved, thereby avoiding the loss caused by overlapping engraving of the graphics to be engraved and the graphics already engraved, and at the same time can reduce the blank space between the graphics to be engraved and the graphics already engraved, thereby reducing the waste of engraving materials;

[0031] 4. The laser engraving preview auxiliary positioning device proposed in the embodiment of the present application can still calculate the engraving coordinates of the to-be-engraved figure according to the deflection angle when the projection is deflected horizontally or in pitch, thereby making the positioning during engraving more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a circuit principle structure block diagram of the laser engraving preview auxiliary positioning device according to an embodiment of the present application;

[0033] Figure 2 This is a specific embodiment of the laser engraving preview auxiliary positioning device of the embodiment of the present application;

[0034] Figure 3 This is a schematic diagram of the principle that the projection module of the frame of the embodiment of the present application adopts a laser galvanometer module;

[0035] Figure 4 This is a schematic diagram of the maximum engraving area, the limit projection range and the box projection position of the embodiment of the present application;

[0036] Figure 5 This is a schematic diagram of the triangular relationship between the pitch angle and the limit projection range of the projection module of the box in the embodiment of the present application;

[0037] Figure 6 A schematic diagram of assisting in the conversion of the limit projection range and the box projection coordinate conversion in the embodiment of the present application;

[0038] Figure 7 It is a schematic diagram of the figure to be engraved and the blank space shown in the background technology;

[0039] Figure 8 This is a schematic diagram of laser engraving and moving materials using the frame projection assisted positioning function of an embodiment of the present application.

[0040] Description of labels:

[0041] Laser emission module 1; box projection module 2; three-axis motion device 3; power module 4; storage unit 5; controller 6; operation and display module 7; data transmission module 8; deflection movable bracket 20; angle detection module 21; scale 22; horizontal deflection manual adjustment structure 23; pitch deflection manual adjustment structure 24; X-axis motor 31; Y-axis motor 32; XY plane motion component 33; Z-axis lifting component 34; Z-axis motor 35; engraved surface 100; maximum engraving area 101; limited angle projection range 102; box projection 103; figure to be engraved 104; figure minimum enclosing frame 105; pre-processing plane 106; wooden board 107; laser 201; X galvanometer 202; Y galvanometer 203; engraving machine structure frame 331; guide rail cross bar 332. DETAILED DESCRIPTION

[0042] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described below are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] Figure 1 This is a circuit principle structure block diagram of the laser engraving preview auxiliary positioning device of the embodiment of the present application. As shown in the figure, the laser engraving preview auxiliary positioning device shown in the figure includes: a laser emission module 1, a frame projection module 2, an angle detection module 21, a power module 4, a storage unit 5, and a controller 6; wherein the three-axis motion device 3 includes an X-axis motor 31 and a Y-axis motor 32; in addition, it can also optionally include a Z-axis motor 35, an operation and display module 7, and a data transmission module 8; in particular, when the Z-axis motor 35 is defaulted, the position of the laser emission module 1 can be raised or lowered by manual adjustment; the operation and display module 7 is used to provide an operation and display interface for the user; and the data transmission module 8 is used to receive the engraving coordinate data of the engraved graphics.

[0044] Specifically, in the embodiment of the present application, the frame projection module 2 may adopt a laser galvanometer module, a transmission projection module, or a reflection projection module.

[0045] Specifically, in the embodiment of the present application, the color of the frame projection includes color and monochrome.

[0046] Specifically, in the embodiment of the present application, the frame projection module 2 has a manual adjustment structure for horizontal deflection.

[0047] Specifically, in the embodiment of the present application, the frame projection module 2 has a manual adjustment structure for pitch and deflection.

[0048] Specifically, in the embodiment of the present application, the angle detection module 21 adopts a three-axis acceleration sensor module or a three-axis gyroscope sensor module.

[0049] Figure 2 This is a specific embodiment of the laser engraving preview auxiliary positioning device of the embodiment of the present application. As shown in the figure, a specific embodiment of the laser engraving preview auxiliary positioning device shown in the figure includes: a laser emission module 1, a frame projection module 2, a deflection movable bracket 20, an angle detection module 21, a three-axis motion device 3, a power module 4, a storage unit 5, a controller 6, an operation and display module 7, and a data transmission module 8; wherein the three-axis motion device 3 includes an X-axis motor 31, a Y-axis motor 32, an XY plane motion component 33, a Z-axis lifting component 34, and a Z-axis motor 35;

[0050] The laser emission module 1 emits laser for laser engraving the engraved surface;

[0051] A deflection movable bracket 20, connected to the frame projection module 2, is used to enable the frame projection module 2 to achieve horizontal deflection and pitch deflection at a set height;

[0052] The angle detection module 21 is connected to the frame projection module 2; the angle detection module 21 is used to detect the horizontal deflection angle and the pitch deflection angle of the frame projection module 2, and is used to assist in converting the engraving coordinates of the graphics to be engraved;

[0053] The three-axis motion device 3 is used to drive the laser emitting module 1 to move on the XY plane and to drive the laser emitting module 1 to move up and down in the Z-axis direction; the laser emitting module 1 is connected to the Z-axis lifting component 34; the Z-axis lifting component 34 is connected to the XY plane motion component 33; the X-axis motor 31 and the Y-axis motor 32 are used to drive the XY plane motion component 33;

[0054] The XY plane motion component 33 is used to drive the Z axis lifting component 34 and the laser emitting module 1 to move on the XY plane; the Z axis lifting component 34 is used to adjust the lifting of the laser emitting module 1 in the Z axis direction; the Z axis motor 35 is connected to the Z axis lifting component 34; the Z axis motor 35 is used to drive the Z axis lifting component 34 to realize electric lifting of the laser emitting module 1 in the Z axis direction; thereby realizing electric focusing of the laser emitting module 1;

[0055] A power module 4, which is used to supply power to the laser emission module 1, the frame projection module 2, the angle detection module 21, the X-axis motor 31 and the Y-axis motor 32;

[0056] Storage unit 5, storage unit 5 is used to store the minimum bounding box coordinate data and size data of the pattern to be engraved, the maximum engraving area coordinate data and size data of the laser emission module 1, and the set height data of the frame projection module 2;

[0057] The controller 6 is electrically connected to the laser emission module 1, the frame projection module 2, the angle detection module 21, the X-axis motor 31, the Y-axis motor 32, the power module 4 and the storage unit 5;

[0058] The controller 6 converts the engraving coordinates of the figure to be engraved within the range of the box projection according to the minimum bounding box coordinate data of the figure to be engraved, the maximum engraving area coordinate data and the size data of the laser emission module 1 in proportion; and controls the laser emission module 1 to laser engrave the figure to be engraved within the limited range of the box projection according to the converted engraving coordinates.

[0059] The operation and display module 7 is used to provide an operation and display interface for the user; the data transmission module 8 is used to receive the engraving coordinate data of the engraving figure.

[0060] Specifically, the figure also illustrates the structure of the deflection movable bracket 20, which can be raised and lowered and fixed; it can be seen that the deflection movable bracket 20 in the figure adopts a pitch deflection manual adjustment structure 24; the horizontal deflection manual adjustment structure 23 is set on the frame projection module 2; the pitch angle of the frame projection module 2 can be adjusted in the X-axis direction and the Y-axis direction by manually adjusting the pitch deflection manual adjustment structure 24; and the horizontal deflection manual adjustment structure 23 can make the frame projection 103 emitted by the frame projection module 2 realize angle deflection on the XY plane. In addition, the deflection movable bracket 20 has a scale 22, which can facilitate the user to set the height position of the frame projection module 2.

[0061] Figure 3 The schematic diagram of the principle of the laser galvanometer module used in the frame projection module of the embodiment of the present application. As shown in the figure, the frame projection module 2 adopts a laser galvanometer module, which includes a laser 201, an X galvanometer 202, and a Y galvanometer 203. Specifically, the laser galvanometer module relies on the X galvanometer 202 and the Y galvanometer 203 to reflect the laser to form a laser projection with variable position on the XY plane. The X galvanometer 202 and the Y galvanometer 203 in the laser galvanometer module are respectively controlled by different motors for deflection; therefore, the laser 201 can continuously move in a linear laser manner within a short period of time, according to the continuous trajectory point coordinates of the laser frame projection, and project a continuous visible laser frame projection with adjustable aspect ratio under human vision, thereby forming the frame projection 103 in the embodiment of the present application on the engraved surface 100.

[0062] Figure 4The maximum engraving area, the limit projection range and the box projection position diagram of the embodiment of the present application are shown in the figure. As shown in the figure, due to the structural boundary restrictions of the engraving machine structure frame 331 and the guide rail crossbar 332, the maximum range within which the engraving point of the laser emission module 1 can move is the maximum engraving area 101; and because the box projection module 2 has the maximum offset projection angle in the front, rear, left and right directions with fixed structural parameters, the box projection module 2 can form a limited angle projection range 102 when the orientation is fixed; accordingly, within any limited angle projection range 102, according to the parameters and size of the figure to be engraved 104, a box projection 103 of the same size as the figure to be engraved 104 can be projected and generated;

[0063] When the user adjusts the pitch angle of the frame projection module 2 at the set height H, the user can manually adjust the direction of the frame projection module 2 through the aforementioned pitch deflection manual adjustment structure 24 to achieve translation; for example, the frame projection 103 with the center point as point P is translated to the position P1; accordingly, it is preferred that the boundary of the frame projection 103 emitted by the frame projection module 2 does not exceed the maximum engraving area 101, and in actual situations, the boundary of the engraving material is generally less than or equal to the maximum engraving area 101. Therefore, when the user adjusts the direction of the frame projection module 2, for example, the frame projection 103 at P1, the boundary of the frame projection 103 can be aligned with the boundary of the material, thereby ensuring maximum material utilization.

[0064] At the same time, the user can also control the frame projection 103 to rotate to any angle in the maximum engraving area 101 through the aforementioned horizontal deflection manual adjustment structure 23; for example, the frame projection 103 is rotated at P3; at this time, since the horizontal deflection angle of the frame projection module 2 can also be detected by the angle detection module 21, the coordinates of the continuous trajectory points on the frame projection 103 after the horizontal deflection can be converted and obtained according to the trigonometric function angle conversion relationship.

[0065] Figure 5This is a schematic diagram of the maximum pitch angle and the limit projection range of the frame projection module of the embodiment of the present application. As shown in the figure, during the installation of the frame projection module 2, the center point of the maximum engraving area 101 can be located by marking, so that the frame projection module 2 is directly above the center point of the maximum engraving area 101, thereby knowing the absolute coordinates of point P in the maximum engraving area 101; since the frame projection module 2 in the figure has a device fixed parameter of 11 degrees for the maximum left and right offset projection angles, when the frame projection module 2 is in a horizontal state, it can project a square limited-angle projection range 102 to the center of the maximum engraving area 101 below, wherein point P is the center point of the limited-angle projection range 102, and point P is also the reference point for the engraving coordinate conversion of the frame projection 103 and the figure to be engraved 104 within this range; at the same time, the virtual line connecting the center point of the frame projection module 2 and point P is also the central axis; in particular, the maximum range of the frame projection 103 and the figure to be engraved 104 in the figure does not exceed the limited-angle projection range 102;

[0066] Correspondingly, the user controls the translation of the frame projection 103 through the aforementioned pitch and yaw manual adjustment structure 24, and can project a limited-angle projection range 102 on the left side of the maximum engraving area 101 without exceeding the maximum engraving area 101, as shown in the figure; that is, the user tilts the frame projection module 2 up 32 degrees, wherein the point P1 is the center point of the limited-angle projection range 102 at this location, and the virtual line connecting the center point of the frame projection module 2 and the point P1 is also the central axis; the point P1 is also the reference point for the engraving coordinate conversion of the figure 104 to be engraved in this frame;

[0067] Specifically, the maximum offset projection angle of the left side of the box projection module 2 is 11 degrees, so according to the trigonometric function relationship, L0=H*tan(11 degrees)*2; after the pitch and deflection manual adjustment structure 24 is tilted up 32 degrees, the central axis at the point P1 is correspondingly deflected by 32 degrees, so according to the trigonometric function relationship, PP1=H*tan(32 degrees), thereby knowing the absolute coordinates of the point P1 in the maximum engraving area 101; based on the same size of the two graphics 104 to be engraved, L0' should be equal to L0, to calculate the continuous track point coordinates of the left limited angle projection range 102, it can be known that in the X direction, the box projection module 2 should be offset by a projection angle of 7 degrees to the left and a projection angle of 9 degrees to the right; thereby generating the box projection 103 on the left side of the figure;

[0068] Of course, when actually projecting the square projection 103, there will be certain errors, resulting in certain deformation of the square projection 103. However, within the allowable range, a certain degree of deformation does not affect the user's observation and positioning. When converting the engraving coordinates of the engraved figure 104, the engraving coordinate conversion is performed based on precise coordinate points such as point P and point P1. Therefore, the square projection 103 only serves to assist the user in observing and locating the engraving position, and the deformation error of the square projection 103 will not cause the deformation of the final engraved figure.

[0069] Figure 6 This is a schematic diagram of the auxiliary conversion of the limit projection range and the frame projection coordinate conversion of the embodiment of the present application. As shown in the figure, this figure is intended to illustrate the conversion process between the relative coordinates on the frame projection 103 and the absolute coordinates on the maximum engraving area 101 when the frame projection module 2 is in a horizontal state. As can be seen from the figure, the maximum engraving area 101 can be divided into 16*16 pixel units, and the Z point is the coordinate origin, which is obtained by the user's positioning setting or by hitting the zero limit switch; because the set height H of the frame projection module 2 is Figure 5 The set height H in is the same. Since the fixed parameters of the front, rear, left and right maximum offset projection angle devices of the frame projection module 2 are known, the coordinates of the four corners A, B, C, and D of the limited angle projection range 102 can be known. Accordingly, within the limited angle projection range 102, if the initial size of the figure 104 to be engraved is 4*4 pixel units, the coordinates of the point P are used as a reference for coordinate transformation, and the coordinates are converted to the coordinate system where the maximum engraving area 101 is located. Then, the coordinates of the four corners E, F, G, and H of the frame projection 103 and the figure to be engraved 104 should be (6,6), (10,6), (10,10), and (6,10), respectively. In this way, a relatively accurate frame projection 103 can be projected and generated. Even if the projected frame projection 103 is slightly deformed in the inclined projection state, it will not cause the figure 104 to be engraved to be deformed during engraving.

[0070] Figure 7 It is a schematic diagram of the figure to be engraved and the blank space shown in the background technology. As shown in the figure, this figure illustrates the figure to be engraved and the blank space shown in the background technology. When a general user imports a picture to be engraved, it can be seen on the pre-processing plane 106 that there is usually a blank area of ​​the non-graphic part. If the general engraving operation is followed and the engraving is performed completely according to the size of the figure to be engraved and the overall coordinates of the picture, then there will inevitably be blank and unused parts on the final engraved surface 100 of the material such as wood, that is, the blank space. In the embodiment of the present application, the minimum enclosing frame 105 of the figure can be obtained according to the figure to be engraved 104 of the imported picture to be engraved, and the size of the aforementioned box projection 103 can be determined according to the minimum rectangular enclosing frame of the minimum enclosing frame 105 of the figure.

[0071] Figure 8 Schematic diagram of laser engraving and moving materials using the frame projection auxiliary positioning function of the embodiment of the present application. As shown in the figure, when the engraving machine device of the embodiment of the present application performs laser engraving on the wooden board 107, the user can project a frame projection 103 through the frame projection module 2 to frame the area to be engraved; by moving the wooden board 107, the blank space between the graphics 104 to be engraved can be fully reduced, thereby improving the utilization rate of the wooden board 107;

[0072] In addition, combined with the above Figure 5 According to the description in FIG. 1 , when the user points the frame projection module 2 to a certain position, the position of the center of the frame projection 103 can be known according to the pitch angle or plane deflection angle of the frame projection module 2. According to this position, the controller of the engraving machine can Figure 7 The initial coordinates of the to-be-engraved graphic 104 on the pre-processing plane 106 are converted into engraving coordinates on the maximum engraving area 101 where the engraving machine device is located.

[0073] This method of using the visual frame projection 103 to locate the engraving area and at the same time frame the engraving movement of the laser emission module 1 within the frame projection 103 for engraving is the laser engraving preview auxiliary positioning function of the present application; because under normal circumstances the size of the wooden board 107 will not exceed the maximum engraving area 101, and the engraving movement range of the laser emission module 1 will not exceed the frame projection 103, when the user adjusts the position of the translation frame projection 103, he only needs to control the visual frame projection 103 not to exceed the boundary of the wooden board 107, so as to avoid the edge collision failure described in the background technology, and therefore there is no need to perform the pre-motion check and manual interactive edge patrol function described in the background technology, so it can save waiting time and the user does not need to wait and observe the edge patrol process, so it is more convenient to use.

[0074] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A laser engraving preview auxiliary positioning device, characterized in that: include: A laser emitting module (1) emits laser light for laser engraving the surface to be engraved; A frame projection module (2) emits a frame projection to assist in positioning and limit the engraving activity range of the laser emission module; A deflection movable bracket (20), connected to the square frame projection module (2), and used to enable the square frame projection module (2) to achieve horizontal deflection and pitch deflection at a set height; An angle detection module (21); the angle detection module (21) is connected to the frame projection module (2); the angle detection module (21) is used to detect the horizontal deflection angle and the pitch deflection angle of the frame projection module (2), so as to assist in converting the engraving coordinates of the graphics to be engraved; A three-axis motion device (3) is used to drive the laser emitting module (1) to move on the XY plane, and to drive the laser emitting module (1) to move up and down in the Z-axis direction; the three-axis motion device (3) comprises an X-axis motor (31), a Y-axis motor (32), an XY plane motion component (33), and a Z-axis lifting component (34); The laser emission module (1) is connected to the Z-axis lifting component (34); the Z-axis lifting component (34) is connected to the XY plane motion component (33); the X-axis motor (31) and the Y-axis motor (32) are used to drive the XY plane motion component (33); The XY plane motion component (33) is used to drive the Z axis lifting component (34) and the laser emitting module (1) to move on the XY plane; the Z axis lifting component (34) is used to adjust the lifting of the laser emitting module (1) in the Z axis direction; A power module (4), the power module (4) being used to supply power to the laser emission module (1), the frame projection module (2), the angle detection module (21), the X-axis motor (31) and the Y-axis motor (32); A storage unit (5), the storage unit (5) being used to store the minimum enclosing frame coordinate data and size data of the pattern to be engraved, the maximum engraving area coordinate data and size data of the laser emission module (1), and the set height data of the frame projection module (2); A controller (6) electrically connected to the laser emission module (1), the frame projection module (2), the angle detection module (21), the X-axis motor (31), the Y-axis motor (32), the power module (4) and the storage unit (5); The controller (6) proportionally converts the engraving coordinates of the figure to be engraved within the projection range of the square frame according to the minimum bounding box coordinate data of the figure to be engraved, the maximum engraving area coordinate data and the size data of the laser emission module (1); and controls the laser emission module (1) to laser engrave the figure to be engraved within the limited range of the square frame projection according to the converted engraving coordinates.

2. The laser engraving preview auxiliary positioning device according to claim 1, characterized in that: The frame projection module (2) adopts a laser galvanometer module, or a transmission projection module, or a reflection projection module.

3. The laser engraving preview auxiliary positioning device according to claim 1, characterized in that: The color of the frame projection includes color and monochrome.

4. The laser engraving preview auxiliary positioning device according to claim 1, characterized in that: The frame projection module (2) has a horizontal deflection manual adjustment structure.

5. The laser engraving preview auxiliary positioning device according to claim 1, characterized in that: The frame projection module (2) has a manual adjustment structure for pitch and deflection.

6. The laser engraving preview auxiliary positioning device according to claim 1, characterized in that: The deflection movable bracket (20) has a lifting adjustment structure and a horizontal movement adjustment structure; the deflection movable bracket (20) has a scale or manual lifting adjustment gear.

7. The laser engraving preview auxiliary positioning device according to claim 1, characterized in that: The angle detection module (21) adopts a three-axis acceleration sensor module or a three-axis gyro sensor module.

8. The laser engraving preview auxiliary positioning device according to claim 1, characterized in that: Also includes: Z-axis motor (35); the Z-axis motor (35) is connected to the Z-axis lifting assembly (34); the Z-axis motor (35) is used to drive the Z-axis lifting assembly (34) to enable the laser emitting module (1) to be electrically lifted in the Z-axis direction.

9. The laser engraving preview auxiliary positioning device according to claim 1, characterized in that: Also includes: Operation and display module (7); the operation and display module (7) is used to provide an operation and display interface for the user.

10. The laser engraving preview auxiliary positioning device according to claim 1, characterized in that: Also includes: Data transmission module (8); the data transmission module (8) is used to receive the engraving coordinate data of the engraving pattern.

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