High-precision positioning laser marking equipment

Abstract

The invention discloses high-precision positioning laser marking equipment. The high-precision positioning laser marking equipment comprises a transmission machine table, a laser marking instrument and a positioning assembly, workpieces to be marked are conveyed on the conveying machine table through a conveying belt. A main body of the laser marking instrument is arranged on one side of the conveying machine table, an adjusting arm of the laser marking instrument is arranged on the main body and extends towards the direction of the conveying belt, a laser emitting end of the laser marking instrument is arranged at the end part of the adjusting arm, and the laser emitting end is suspended above the conveying belt and is used for marking a workpiece conveyed on the conveying belt; two opposite and parallel side plates are symmetrically arranged on the conveying machine table and used for being in transmission connection with conveying rollers, and a conveying belt is tensioned on the conveying rollers. A positioning assembly is arranged on the inner side wall of the side plate and arranged above the conveying belt in a suspended mode. The positioning assembly used for assisting in workpiece conveying and positioning is arranged above the conveying belt, the displacement amount of the laser marking instrument when the marking position of the laser emitting end of the laser marking instrument is adjusted can be reduced, the adjusting efficiency of the laser emitting end is improved, and the marking precision can be improved.

Description

Technical Field

[0001] The invention relates to the technical field, and in particular to a high-precision positioning laser marking device. Background Art

[0002] Laser marking equipment can be widely used in industrial production for identification, imprinting, engraving and other processes. It has the advantages of easy operation, high precision, fast speed and wide application range. In different industries, laser marking equipment can be used for the processing and identification of metal, plastic, glass, ceramics, leather, paper and other materials.

[0003] In the prior art, laser marking equipment generally consists of a workbench, a laser, and a control system. When performing marking operations, the workpiece to be marked needs to be fixed on the workbench, or intermittently transported through a conveyor belt, so as to use the laser beam emitted by the laser to achieve the marking operation. During the laser marking process, the laser marking equipment generally detects the position of the workpiece through a visual sensor, determines the marking area, and then adjusts its own position to adapt to the actual position of the workpiece to ensure the accuracy of its marking on the workpiece and avoid deviation.

[0004] It can be seen that the accuracy of laser marking equipment is greatly affected by the relative position between its own laser and the workpiece. The increase in the offset of the workpiece position will also increase the displacement of the laser during adaptive adjustment, affecting the marking accuracy and efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a high-precision positioning laser marking device to solve the problem in the prior art that the relative position between the actual positioning of the workpiece and the laser marking instrument is difficult to be adjusted in a linked manner, thus affecting the marking accuracy.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: The present invention provides a high-precision positioning laser marking device, comprising: A conveyor table, used to convey the workpiece to be marked via a horizontally arranged conveyor belt; A laser marking instrument, comprising a main body arranged on one side of the conveyor, an adjustment arm arranged on the main body and extending toward the conveyor belt, and a laser emitting end arranged at the end of the adjustment arm, wherein the laser emitting end is suspended above the conveyor belt for marking the workpiece; Wherein, two parallel side plates are symmetrically arranged on the transmission platform, which are used for transmission connection with transmission rollers, and the transmission belt is tensioned on the transmission rollers; A positioning assembly is provided on the inner wall of the side plate, and the positioning assembly is suspended above the conveyor belt; the two positioning assemblies are parallel to each other to form a guiding space for the workpiece; during the transmission process of the workpiece.

[0007] Optional, The positioning assembly includes a positioning guide bar, the outer side of which is connected to the side plate through a screw rod transmission, and the power motor drives the positioning guide bar to translate by driving the screw rod to adjust the distance between the two positioning guide bars.

[0008] Optional, The inner side of the positioning guide bar is provided with a plurality of rollers in the vertical direction to contact with the workpiece to form rolling friction; The upper side of the positioning guide bar is bent inward at 90° to be rotatably connected to the roller, and the rollers on both sides jointly generate a clamping force on the workpiece.

[0009] Optional, The roller comprises an upper column section and a lower column section coaxially arranged in a vertical orientation; The lower column segment is shrunk in diameter relative to the upper column segment, and the connection between the upper column segment and the lower column segment is smoothly transitioned into a circular fillet shape; The lower column section is used to limit the horizontal and vertical positions of workpieces whose thickness does not exceed the column height of the lower column section; The upper column section is used to limit the horizontal direction of a workpiece whose thickness exceeds the height of the column body of the lower column section.

[0010] Optional, The upper column section and the lower column section are fixedly connected to keep synchronous rolling.

[0011] Optional, The upper column section and the lower column section are movably connected via a screw barrel, and the upper column section and the lower column section roll independently of each other; Wherein, the lower column section is rotatably connected to the screw barrel, and the upper column section is provided with a stud threadedly connected to the screw barrel.

[0012] Optional, The positioning assembly comprises a vertically arranged synchronous belt, which is driven by a servo motor. The synchronous belt is in contact with the workpiece and is synchronously driven with the transmission belt.

[0013] Optional, The synchronous belt is provided with a spacing baffle for limiting the distance between adjacent workpieces.

[0014] Optional, The surface of the spacer baffle contacting the workpiece is arc-shaped.

[0015] Optional, One end of the positioning guide bar is provided with an outwardly expanding and inclined feeding guide plate, and the angle between the feeding guide plate and the positioning guide bar is 10°.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention arranges a positioning component for assisting the transmission and positioning of the workpiece above the conveyor belt. Not only can the positioning component and the laser marking instrument cooperate with each other to make the workpiece enter the marking trajectory of the laser emitting end of the laser marking instrument in advance, so as to reduce the displacement of the laser marking instrument when adjusting the marking position of its laser emitting end, thereby improving the adjustment efficiency of the laser emitting end and the marking efficiency, but also because the transmission trajectory of the workpiece is controllable, the marking accuracy can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 A three-dimensional structural diagram of a high-precision positioning laser marking device provided by the present invention; Figure 2 for Figure 1 Enlarged view of middle Ⅰ; Figure 3 A three-dimensional structural diagram of a roller in one embodiment of the present invention; Figure 4 for Figure 1 A top view of Figure 5 An assembly diagram of a roller in one embodiment provided by the present invention; Figure 6 A schematic diagram of the use state of a roller in one embodiment of the present invention; Figure 7 A top view of a laser marking device in one embodiment of the present invention; Figure 8 for Figure 7 Side view of Fig. 9 A three-dimensional structural diagram of a synchronous belt in an embodiment of the present invention; Fig.10 for Fig. 9 Top view of the .

[0019] The numbers in the figure represent the following: 10. Conveyor platform; 11. Conveyor belt; 12. Side plate; 13. Conveyor roller; 14. Positioning assembly; 141. Positioning guide bar; 142. Synchronous belt; 143. Spacer baffle; 15. Screw rod; 16. Roller; 161. Upper column section; 162. Lower column section; 163. Screw barrel; 164. Stud; 17. Feed guide plate; 20. Laser marking instrument; 21. Main body; 22. Adjustment arm; 23. Laser emitting end; 30. Workpiece. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 , 2 As shown in , the present invention provides a high-precision positioning laser marking device, comprising: The conveyor 10 is provided with a conveyor belt 11, and the workpiece 30 to be marked is conveyed by the conveyor belt 11; The laser marking instrument 20 includes a main body 21, an adjustment arm 22, a laser emitting end 23 and a conveyor 10; the main body 21 is arranged on one side of the conveyor 10, the adjustment arm 22 is arranged on the main body 21 and extends toward the conveyor belt 11, the laser emitting end 23 is arranged at the end of the adjustment arm 22, and the laser emitting end 23 stops above the conveyor belt 11 for marking the workpiece 30 being conveyed; Among them, two parallel side plates 12 are provided on the conveying machine 10, and the side plates 12 are used for driving and connecting the conveying rollers 13, and the conveying belt 11 is tensioned on the conveying rollers 13; a positioning assembly 14 is provided on the inner side wall of the side plate 12, and the positioning assembly 14 is located above the conveying belt 11; the non-opposite sides of the positioning assembly 14 are respectively connected to the side plates 12 so that the two positioning assemblies 14 are symmetrically arranged relative to the transmission center line of the conveying belt 11, and the two positioning assemblies 14 are parallel to each other to form a guiding space for the workpiece 30 between their opposite inner sides; during the transmission process of the workpiece 30, the positioning assembly 14 and the workpiece 30 are in continuous contact.

[0022] The present invention provides a high-precision positioning laser marking device, which transmits a workpiece 30 on a conveyor belt 11 in sequence and intermittently, and uses a laser marking instrument 20 to mark the workpiece 30 at the same time; moreover, the relative position of the laser emitting end 23 and the workpiece 30 can be adaptively adjusted by the adjusting arm 22 to which they are attached, so as to ensure that the marking point is in a preset area. Specifically, the position to be marked of the workpiece 30 can be detected by the CCD visual detection system on the laser marking instrument 20, and the position of the laser emitting end 23 can be adjusted accordingly by controlling the adjusting arm 22 through the PLC controller.

[0023] In order to improve the positioning accuracy of the marking equipment, the present invention also specifically arranges a positioning component 14 for assisting the transmission positioning of the workpiece 30 above the conveyor belt 11, so that when the workpiece 30 enters the conveying area of ​​the conveyor belt 11 and approaches the marking working area of ​​the laser marking instrument 20, the workpiece 30 itself is in a central position relative to the positioning component 14 due to the limitation of the positioning component 14, so as to adapt to the position of the laser emitting end 23 pre-set above the positioning component 14, and assist in improving the marking positioning accuracy. In summary, through the arrangement of the positioning component 14, the present invention can not only make the workpiece 30 enter the marking trajectory of the laser emitting end 23 on the laser marking instrument 20 in advance through the mutual cooperation of the positioning component 14 and the laser marking instrument 20, which is beneficial to reduce the displacement of the laser marking instrument 20 when adjusting the marking position of its laser emitting end 23, improve the adjustment efficiency of the laser emitting end 23, and improve the marking efficiency, but also because the transmission trajectory of the workpiece 30 is controllable, the marking accuracy can be improved.

[0024] Please continue reading Figure 1 , 2 4, in order to enable the positioning assembly 14 in the above embodiment to adjust the position of the workpiece 30, so that it can cooperate with the laser marking instrument 20, thereby improving the positioning accuracy during marking. In a preferred embodiment provided by the present invention for the positioning assembly 14, the positioning assembly 14 includes a positioning guide bar 141, the outer side of the positioning guide bar 141 is connected to the side plate 12 through a screw rod 15, and the power motor drives the positioning guide bar 141 to translate by driving the screw rod 15, so that the spacing between the two positioning guide bars 141 is adjustable; the screw rod 15 is respectively arranged near the front end and the rear end of the positioning guide bar 141.

[0025] In this embodiment, the transmission position of the workpiece 30 on the conveyor belt 11 is uniformly guided by the positioning guide bar 141 to avoid the workpiece 30 being in an inconsistent position in the transmission direction of the conveyor belt 11 when being transmitted, thereby affecting the marking accuracy. Furthermore, the positioning guide bar 141 is connected to the screw rod 15 and driven by a servo motor with more precise transmission control. It should be noted that the output distances of the screw rods 15 on the positioning guide bars 141 on both sides may not be equal, that is, the workpiece 30 may not be in the center position of the conveyor belt 11, so that the position of the workpiece 30 can actively adapt to the marking trajectory of the laser emitting end 23, so that the positioning guide bar 141 and the laser emitting end 23 can be linked and adjusted to break through the limitations of adjusting the marking position of the laser emitting end 23 through the adjustment arm 22, and improve the marking accuracy while also facilitating the improvement of marking efficiency.

[0026] In the above embodiment, the sliding friction between the positioning guide bar 141 and the workpiece 30 is likely to damage the workpiece 30 and also likely to hinder the transmission process of the workpiece, causing its position to shift, which is not conducive to improving the marking accuracy.

[0027] To solve the above problems, please continue to refer to Figure 1 , 2 As shown, in a preferred embodiment provided by the present invention based on the above-mentioned embodiment, a plurality of vertical rollers 16 are provided on the inner side of the positioning guide bar 141 to contact with the workpiece 30 to form rolling friction; wherein, the upper side of the positioning guide bar 141 is bent 90° inwardly for rotationally connecting the rollers 16, and the rollers 16 on both sides jointly generate a clamping force on the workpiece 30.

[0028] In this embodiment, one end of the roller 16 is connected to the bending part of the positioning guide bar 141 through a bearing, so that the contact between the positioning guide bar 141 and the workpiece 30 is replaced by the setting of the roller 16, so that the sliding friction between the two is converted into rolling friction, thereby reducing the resistance generated by the positioning guide bar 141 during the transmission process of the workpiece 30, which is beneficial to maintaining the transmission position of the workpiece 30, thereby improving the marking accuracy.

[0029] In the above embodiment, the workpiece 30 may deviate in the vertical direction during the transmission process due to the uneven transmission surface of the conveyor belt 11. Since the roller 16 in the above embodiment has a straight columnar structure, it is impossible to assist in positioning the workpiece 30 that deviates in the vertical direction, thereby affecting the accuracy of marking.

[0030] To solve the above problems, please continue to refer to Figure 2 , 3As shown, in a preferred embodiment provided by the present invention based on the above-mentioned embodiment, the roller 16 includes an upper column segment 161 and a lower column segment 162 coaxially arranged in a vertical orientation; wherein the lower column segment 162 shrinks in diameter relative to the upper column segment 161, and the connecting portion between the upper column segment 161 and the lower column segment 162 smoothly transitions into a circular fillet shape; the lower column segment 162 is used to limit the workpiece 30 whose thickness does not exceed the joint between it and the upper column segment 161 in the horizontal and vertical directions; the upper column segment 161 is used to limit the workpiece 30 whose thickness exceeds the height of the column of the lower column segment 162 in the horizontal direction.

[0031] Based on the above content, in a specific embodiment provided by the present invention for the upper column segment 161, the upper column segment 161 and the lower column segment 162 are fixedly connected to maintain synchronous rolling.

[0032] In this embodiment, by setting upper column segments 161 and lower column segments 162 of different diameters, workpieces 30 of various thicknesses can be limited in transmission. For example, for workpieces 30 with a smaller thickness, the lower column segment 162 is used to guide the workpiece 30 and limit the workpiece 30 in the horizontal and vertical directions; for workpieces 30 with a larger thickness, the spacing between the positioning guide bars 141 is increased, and the upper column segment 161 is used alone for guiding without interfering with its vertical deviation.

[0033] Different from the above embodiment, Figure 5-6 As shown, in another embodiment of the present invention, in order to enable the roller 16 to act on a workpiece 30 with a smaller thickness, the upper column segment 161 and the lower column segment 162 are movably connected by a screw barrel 163, and the upper column segment 161 and the lower column segment 162 roll independently of each other; wherein, the lower column segment 162 is rotatably connected to the screw barrel 163, and the upper column segment 161 is provided with a stud 164 which is threadedly connected to the screw barrel 163, and the distance between the upper column segment 161 and the lower column segment 162 can be changed by rotating the screw barrel 163.

[0034] In this embodiment, by enabling the lower column section 162 to rotate away from the upper column section 161 and the lower column section 162 to be separated from the upper column section 161 and rotate independently, the lower column section 162 can be used to guide and limit the vertical direction of the workpiece 30 of smaller thickness, thereby avoiding vertical deviation of the workpiece 30 due to the uneven transmission surface of the conveyor belt 11 during the transmission process, thereby improving the marking accuracy.

[0035] In the above embodiment, the rolling of the roller 16 mainly depends on the follower motion generated by the friction between the roller 16 and the workpiece 30 , which is not conducive to improving the transmission efficiency of the workpiece 30 and easily causes the workpiece 30 to deflect.

[0036] In order to solve the above problems, Figure 7-8As shown, in a preferred embodiment provided by the present invention based on the above embodiment, the positioning assembly 14 includes a vertically arranged synchronous belt 142, the synchronous belt 142 is driven by a servo motor, the synchronous belt 142 is in contact with the workpiece 30, and is synchronously driven with the conveyor belt 11.

[0037] In the above embodiment, although the lateral displacement of the workpiece 30 is restricted, the distance between the upstream and downstream workpieces 30 is likely to be different, resulting in inconsistent intervals between two adjacent workpieces 30 arriving at the marking point, which may cause deviations in the marking position when the laser marking instrument 20 performs marking operations at equal time intervals.

[0038] In order to solve the above problems, Figure 9-10 As shown, in a preferred embodiment provided by the present invention based on the above embodiment, a spacing baffle 143 is provided on the synchronous belt 142 to limit the distance between adjacent workpieces 30 .

[0039] In this embodiment, the rotation speed of the synchronous belt 142 is adjustable. When the spacing between several workpieces 30 is different, the synchronous belt 142 is appropriately accelerated so that it can use the spacing baffle 143 thereon to drive the workpiece 30 to move forward, thereby adjusting the spacing of the workpieces 30 to make the spacing uniform.

[0040] In the preferred embodiment provided by the present invention based on the above embodiment, in order to adapt to the shape of the circular workpiece 30, the surface of the spacer baffle 143 in contact with the workpiece 30 is arc-shaped.

[0041] In order to facilitate the workpiece 30 to be guided into the area between the positioning guide bars 141, see Figure 1 As shown, in a preferred embodiment provided by the present invention based on the above embodiment, one end of the positioning guide bar 141 is provided with an outwardly expanded and inclined feed guide plate 17, and the angle between the feed guide plate 17 and the positioning guide bar 141 is 10°.

[0042] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A high-precision positioning laser marking device, characterized in that: include: A conveyor (10) for conveying a workpiece (30) to be marked via a horizontally arranged conveyor belt (11); A laser marking instrument (20), comprising a main body (21) disposed on one side of the conveyor platform (10), an adjustment arm (22) disposed on the main body (21) and extending in the direction of the conveyor belt (11), and a laser emitting end (23) disposed at the end of the adjustment arm (22), wherein the laser emitting end (23) is suspended above the conveyor belt (11) for marking a workpiece (30); Wherein, two parallel side plates (12) are symmetrically arranged on the transmission platform (10) and are used for transmission connection with a transmission roller (13), and the transmission belt (11) is tensioned on the transmission roller (13); A positioning assembly (14) is provided on the inner side wall of the side plate (12), and the positioning assembly (14) is suspended above the conveyor belt (11); the two positioning assemblies (14) are parallel to each other to form a guiding space for the workpiece (30); during the conveyance process of the workpiece (30).

2. The high-precision positioning laser marking device according to claim 1, characterized in that: The positioning assembly (14) comprises a positioning guide bar (141), the outer side of the positioning guide bar (141) is connected to the side plate (12) via a screw rod (15), and the power motor drives the screw rod (15) to drive the positioning guide bar (141) to move horizontally, so as to adjust the distance between the two positioning guide bars (141).

3. The high-precision positioning laser marking device according to claim 2, characterized in that: A plurality of rollers (16) in a vertical direction are arranged on the inner side of the positioning guide bar (141) and contact the workpiece (30) to form rolling friction contact; The upper side of the positioning guide bar (141) is bent inward at 90° to be rotatably connected to the roller (16), and the rollers (16) located on both sides jointly generate a clamping force on the workpiece (30).

4. The high-precision positioning laser marking device according to claim 3 is characterized in that: The roller (16) comprises an upper column section (161) and a lower column section (162) coaxially arranged in a vertical orientation; The lower column segment (162) is shrunk in diameter relative to the upper column segment (161), and the connection portion between the upper column segment (161) and the lower column segment (162) is smoothly transitioned and is in the shape of an annular fillet; The lower column section (162) is used to limit the position of a workpiece (30) having a thickness not exceeding the column height of the lower column section (162) in the horizontal and vertical directions; The upper column section (161) is used to limit the horizontal position of a workpiece (30) whose thickness exceeds the column height of the lower column section (162).

5. The high-precision positioning laser marking device according to claim 4, characterized in that: The upper column section (161) and the lower column section (162) are fixedly connected to maintain synchronous rolling.

6. The high-precision positioning laser marking device according to claim 4, characterized in that: The upper column segment (161) and the lower column segment (162) are movably connected via a screw barrel (163), and the upper column segment (161) and the lower column segment (162) roll independently of each other; The lower column section (162) is rotatably connected to the screw barrel (163), and the upper column section (161) is provided with a stud (164) threadedly connected to the screw barrel (163).

7. The high-precision positioning laser marking device according to claim 1, characterized in that: The positioning assembly (14) comprises a vertically arranged synchronous belt (142), wherein the synchronous belt (142) is driven by a servo motor, the synchronous belt (142) is in contact with the workpiece (30), and is synchronously driven with the transmission belt (11).

8. The high-precision positioning laser marking device according to claim 7, characterized in that: The synchronous belt (142) is provided with a spacing baffle (143) for limiting the spacing between adjacent workpieces (30).

9. The high-precision positioning laser marking device according to claim 8, characterized in that: The surface of the spacing baffle (143) in contact with the workpiece (30) is arc-shaped.

10. A high-precision positioning laser marking device according to claim 5 or 6, characterized in that: One end of the positioning guide bar (141) is provided with an outwardly expanding and inclined material feeding guide plate (17), and the angle between the material feeding guide plate (17) and the positioning guide bar (141) is 10°.

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