Rotary marking equipment and rotary marking method

Abstract

A rotary marking device and method are disclosed. The device includes a main frame, a support assembly disposed on one side of the main frame, a rotation mechanism for driving the support assembly to rotate relative to the main frame, a graphic positioning mechanism connected to the main frame, and a marking mechanism connected to the main frame. The graphic positioning mechanism includes a camera disposed on one side of the main frame. The marking mechanism includes a laser disposed on one side of the main frame. The camera and the laser are distributed along a circumference centered on the axis of the rotation mechanism. The rotation mechanism drives the support assembly and the product to rotate. The camera's photosensitive port faces the product's rotation range and generates positioning image information based on the shape of the product's edges and corners. The rotation mechanism adjusts the product to a preparation station based on the positioning image information. After the product rotates a predetermined angle from the preparation station, the product's edges and corners fall within the laser's marking range. Because rotational motion replaces two-dimensional linear motion, positioning can be achieved while avoiding increased structural complexity.

Description

Technical Field

[0001] The present invention relates to a laser marking device, in particular to a rotary marking device and a rotary marking method. Background Art

[0002] Laser marking machines use laser beams to permanently mark the surfaces of various materials. The marking effect is achieved by evaporating the surface material to reveal the underlying material, thereby creating exquisite patterns, trademarks, and text. Laser marking machines are mainly divided into: CO2 laser marking machines, semiconductor laser marking machines, fiber laser marking machines, and YAG laser marking machines. Currently, laser marking machines are mainly used in applications that require higher precision and finer details.

[0003] To ensure accurate marking positions, products to be marked are generally mounted on a two-dimensional linear motion module, which is then used to adjust the product's position. However, when products with larger side lengths require laser marking on their edges or corners, the larger edge span results in longer lead screws and support mechanisms for the two-dimensional linear motion module, making the structure of the laser marking device complex and hindering the control of production costs. Summary of the Invention

[0004] Based on this, it is necessary to provide a rotary marking device and a rotary marking method to address the problem that when a product with a large area needs to be laser marked on its edges or corners, a two-dimensional linear motion module with a large motion length needs to be used.

[0005] A rotary marking device comprises: a main frame, a support assembly arranged on one side of the main frame, a rotation mechanism for driving the support assembly to rotate relative to the main frame, a graphic positioning mechanism connected to the main frame, and a marking mechanism connected to the main frame; the graphic positioning mechanism comprises a camera arranged on one side of the main frame; the marking mechanism comprises a laser arranged on one side of the main frame; the camera and the laser are distributed along a circle with the axis of the rotation mechanism as the center.

[0006] The above-mentioned rotary marking equipment places the product to be marked on the support assembly, and the rotating mechanism drives the support assembly and the product to rotate. The camera's photosensitive port faces the rotation range of the product and generates positioning image information according to the shape of the product's edges and corners. The rotating mechanism adjusts the product to the preparation station according to the positioning image information. After the product rotates a predetermined angle from the preparation station, the corners of the product fall into the marking range of the laser. Since rotational motion is used instead of two-dimensional linear movement, it can complete positioning while avoiding an increase in structural complexity.

[0007] In one embodiment, the support assembly includes a supporting panel rotatably arranged on the upper side of the main frame; the rotating mechanism includes a rotating motor installed in the main frame; and the supporting panel rotates with the output shaft of the rotating motor.

[0008] In one embodiment, a plurality of vacuum holes are provided on the surface of the supporting panel, thereby preventing the product from being offset relative to the supporting panel and preventing the accuracy of laser marking from being affected.

[0009] In one embodiment, the support assembly further comprises a plurality of clamps arranged near the edge of the supporting panel, thereby preventing the product from being offset relative to the supporting panel and preventing the accuracy of the laser marking from being affected.

[0010] In one embodiment, the graphic positioning mechanism also includes a positioning bracket arranged on the upper side of the main frame, and a positioning adjustment platform connected to the positioning bracket; the positioning adjustment platform includes a side guide rail connected to one side of the positioning bracket, a first slider slidably connected to the side guide rail, and a first locking screw passed through the first slider; the camera is connected to the first slider; thereby, the height of the camera relative to the supporting panel or the main frame can be adjusted.

[0011] In one embodiment, the positioning adjustment platform also includes a second slider slidably connected to the side guide rail, and a second locking screw passing through the second slider; the second slider is located on the lower side of the first slider; the graphic positioning mechanism also includes a light source connected to the second slider; thereby allowing the product surface to obtain sufficient light, thereby improving the image effect obtained by the camera.

[0012] In one embodiment, the marking mechanism also includes a processing adjustment component connected to the main frame; the processing adjustment component includes a vertical frame arranged on the upper side of the main frame, a screw rod rotatably arranged in the vertical frame, a rotating handle connected to the upper end of the screw rod, a third slider engaged with the screw rod thread, and a lifting plate connected to the third slider; the laser is connected to the lifting plate; thereby, the laser can be lifted and lowered relative to the supporting panel or the main frame, making it convenient to mark products of different thicknesses.

[0013] In one embodiment, the laser is located on the upper side of the lifting plate; the marking mechanism also includes a vacuum cleaner connected to the lower side of the lifting plate; the suction port of the vacuum cleaner is arranged close to the light outlet of the laser; thereby preventing the smoke and dust generated during the marking process on the product surface from adhering to the laser lens or the product surface.

[0014] In one embodiment, the graphic positioning mechanism further includes a lens installed near the photosensitive port of the camera; thereby facilitating focusing of the light reflected by the product onto the photosensitive port of the camera, thereby ensuring clarity of the acquired image.

[0015] A rotary marking method comprises the following steps:

[0016] The rotating mechanism drives the product mounted on the support assembly to rotate for inspection, and the camera captures the positioning marks on the product;

[0017] After the camera detects the positioning mark on the product, the rotation mechanism rotates the positioning mark of the product to coincide with the preparation station;

[0018] The rotating mechanism drives the product to perform directional rotation, so that the part of the product in the preparation station is rotated to the processing station;

[0019] The laser performs marking processing on the portion of the product located in the processing station. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional schematic diagram of a rotary marking device according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 The three-dimensional schematic diagram of the rotary marking device shown at another angle;

[0022] Figure 3 for Figure 1 A three-dimensional schematic diagram of the graphic positioning mechanism;

[0023] Figure 4 for Figure 1 A three-dimensional schematic diagram of the marking mechanism;

[0024] Figure 5 for Figure 1 A top view of the rotary marking apparatus shown;

[0025] Figure 6 FIG. 4 is a flow chart of a rotary marking method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] To facilitate understanding of the present invention, the present invention will be described more fully below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] See also Figures 1 to 5 , a rotary marking device 100 according to one embodiment of the present invention, is used to mark the edges or corners of a flat workpiece or product 800, such as the corners of a screen front frame assembly. The rotary marking device 100 includes a main frame 20, a support assembly 30 disposed on one side of the main frame 20, a rotation mechanism 40 for driving the support assembly 30 to rotate relative to the main frame 20, a pattern positioning mechanism 50 connected to the main frame 20, and a marking mechanism 60 connected to the main frame 20. The pattern positioning mechanism 50 includes a camera 51 disposed on one side of the main frame 20; the marking mechanism 60 includes a laser 61 disposed on one side of the main frame 20; the camera 51 and the laser 61 are distributed along a circle centered on the axis of the rotation mechanism 40.

[0029] After placing the product 800 to be marked on the support assembly 30, the rotating mechanism 40 drives the support assembly 30 and the product 800 to rotate, and the photosensitive port 511 of the camera 51 faces the rotation range of the product 800 and generates positioning image information according to the shape of the corners of the product 800. The rotating mechanism 40 adjusts the product 800 to the preparation station according to the positioning image information. After the product 800 rotates a predetermined angle from the preparation station, the corners of the product 800 fall into the marking range of the laser 61. Since rotational motion is used instead of two-dimensional linear motion, the positioning can be completed while avoiding an increase in structural complexity.

[0030] Optionally, the camera 51 is a CCD industrial camera.

[0031] See also Figure 1 In one embodiment, the support assembly 30 includes a supporting panel 31 rotatably arranged on the upper side of the main frame 20; the rotating mechanism 40 includes a rotating motor installed in the main frame 20; the supporting panel 31 rotates with the output shaft of the rotating motor; optionally, the rotating motor is a servo motor or a stepper motor; further, in order to improve the stability of the supporting panel 31, the rotating mechanism 40 also includes a rotating support platform 42 connected to the main frame 20, and the rotating support platform 42 is rollingly connected to the supporting panel 31.

[0032] In one embodiment, a plurality of vacuum suction holes are provided on the surface of the supporting panel 31; when the side length of the supporting panel 31 is smaller than the side length of the product 800, the middle part of the product 800 can be adsorbed through the vacuum suction holes on the supporting panel 31, thereby preventing the product 800 from shifting relative to the supporting panel 31 and preventing the accuracy of the laser marking from being affected; specifically, the airway in the supporting panel 31 can be connected to the external air pipe through a rotary joint.

[0033] In one embodiment, the support assembly 30 also includes a plurality of clamps arranged near the edge of the supporting panel 31; when the side length of the supporting panel 31 is slightly larger than the side length of the product 800, the edge of the product 800 is clamped by the clamp to avoid displacement relative to the supporting panel 31; optionally, the clamp uses a spring clip to press the edge of the product 800.

[0034] See also Figure 3 In one embodiment, the graphic positioning mechanism further includes a positioning bracket 52 arranged on the upper side of the main frame 20, and a positioning adjustment platform 53 connected to the positioning bracket 52; the positioning adjustment platform 53 includes a side guide rail 531 connected to one side of the positioning bracket 52, a first slider 532 slidably connected to the side guide rail 531, and a first locking screw 533 passed through the first slider 532; the camera 51 is connected to the first slider 532; the first locking screw 533 is threadedly engaged with the first slider 532, and the position of the first slider 532 relative to the side guide rail 531 can be locked by the abutment of the first locking screw 533 against the side guide rail 531, so that the height of the camera 51 relative to the supporting panel 31 or the main frame 20 can be adjusted to facilitate obtaining a suitable image range or adapt to products 800 of different thicknesses.

[0035] In one embodiment, the positioning adjustment platform 53 also includes a second slider 534 slidably connected to the side guide rail 531, and a second locking screw 535 inserted into the second slider 534; the second slider 534 is located on the lower side of the first slider 532; the graphic positioning mechanism 50 also includes a light source component 54 connected to the second slider 534; the second locking screw 535 is threadedly engaged with the second slider 534, and the position of the second slider 534 or the light source component 54 relative to the side guide rail 531 can be locked by the abutment of the second locking screw 535 against the side guide rail 531; the light source component 54 is annular, so that the surface of the product 800 obtains sufficient light, thereby improving the image effect obtained by the camera 51.

[0036] See also Figure 4In one embodiment, the marking mechanism 60 further includes a processing adjustment assembly 62 connected to the main frame 20; the processing adjustment assembly 62 includes a vertical frame 621 arranged on the upper side of the main frame 20, a screw rod 622 rotatably arranged in the vertical frame 621, a rotating handle 623 connected to the upper end of the screw rod 622, a third slider 624 threadedly engaged with the screw rod 622, and a lifting plate 625 connected to the third slider 624; the laser 61 is connected to the lifting plate 625; when the rotating handle 623 is rotated to rotate the screw rod 622 along its own axis, the screw rod 622 drives the third slider 624 to move along the vertical frame 621, thereby allowing the laser 61 to be raised and lowered relative to the supporting panel 31 or the main frame 20, thereby facilitating the marking of products 800 of different thicknesses.

[0037] In one embodiment, the laser 61 is located on the upper side of the lifting plate 625; the marking mechanism 60 also includes a vacuum cleaner 63 connected to the lower side of the lifting plate 625; the suction port of the vacuum cleaner 63 is arranged close to the light outlet of the laser 61; thereby preventing the smoke and dust generated during the marking process on the surface of the product 800 from adhering to the lens of the laser 61 or the surface of the product 800, thereby preventing the output power or service life of the laser 61 from being affected.

[0038] See also Figure 3 In one embodiment, the graphic positioning mechanism 50 further includes a lens 55 installed near the light-sensing port 511 of the camera 51; thereby facilitating focusing of the light reflected by the product 800 onto the light-sensing port 511 of the camera 51, thereby ensuring clarity of the acquired image.

[0039] Specifically, the rotary marking device 100 also includes a main control module, which is used to receive the positioning image information generated by the camera 51. The main control module controls the rotation or stop of the rotating mechanism 40 according to the positioning image information; further, after the rotating mechanism 40 completes the rotation of the predetermined angle, it feeds back a ready signal to the main control module. After receiving the ready signal, the main control module triggers the laser 61 to mark the edge or corner of the product 800.

[0040] See also Figure 5 and Figure 6 The present invention also provides a rotary marking method for marking the edge or corner of a flat or frame-shaped product 800, comprising the following steps:

[0041] S10: The rotating mechanism 40 drives the product 800 mounted on the supporting assembly 30 to rotate for detection, and the camera 51 captures the positioning mark 901 on the product 800;

[0042] S20: After the camera 51 detects the positioning mark 901 on the product 800, the rotating mechanism 40 rotates the positioning mark 901 of the product 800 to coincide with the preparation station 902;

[0043] S30: The rotating mechanism 40 drives the product 800 to perform directional rotation, so that the part of the product 800 in the preparation station 902 is rotated to the processing station 903;

[0044] S40: The laser 61 performs marking processing on the portion of the product 800 located in the processing station 903 .

[0045] When it is necessary to mark the corners or edges of a product 800 with a larger plane size, the product 800 is rotated by the rotating mechanism 40, and combined with the detection of the camera 51, the parts with the positioning mark 901 are rotated and passed through the processing station 903 in sequence for laser marking, thereby simplifying the movement control of the product 800 and avoiding the need for large-scale two-dimensional linear motion control.

[0046] Specifically, in step S10, the main control module can determine whether the positioning mark 901 is captured based on whether there is a fitable image in the positioning image information fed back by the camera 51; the positioning mark 901 can be the corner shape feature of the product 800, or it can be a graphic pasted or printed on the surface of the product 800.

[0047] In step S20 , the preparation station 902 is located below the light-sensing port 511 of the camera 51 so as to precisely adjust the position of the positioning mark 901 on the product 800 .

[0048] In step S30, during the directional rotation process, the camera 51 simultaneously captures the next positioning mark 901 and records the positioning mark 901 detected during the directional rotation process as a compact processing mark. The directional rotation angle can be measured and determined during the equipment assembly and commissioning.

[0049] Regarding step S40 , during the marking process, the camera 51 simultaneously captures the next positioning mark 901 and records the positioning mark 901 detected during the marking process as a misalignment processing mark.

[0050] After step S40, that is, after completing one marking process, step S51 is also included: if a compact processing mark is recorded, the rotating mechanism 40 rotates in the opposite direction so that the part of the product 800 with the compact processing mark coincides with the preparation station 902. Thereafter, the product 800 is directional rotated again so that the part of the product 800 in the preparation station 902 is rotated to the processing station 903 for the next marking process.

[0051] After step S40, after completing one marking process, step S52 is also included: if an offset processing mark is recorded, the product 800 is directly directional rotated, so that the part of the product 800 with the offset processing mark in the preparation station 902 is rotated to the processing station 903 for the next marking process.

[0052] Furthermore, in the rotary marking method, whether the marking process of the product 800 is completed is determined based on the number of markings on the same product 800 .

[0053] In this embodiment, after the product to be marked is placed on the support assembly, the rotating mechanism drives the support assembly and the product to rotate. The photosensitive port of the camera is directed to the rotation range of the product and generates positioning image information according to the shape of the corners of the product. The rotating mechanism adjusts the product to the preparation station according to the positioning image information. After the product is rotated from the preparation station by a predetermined angle, the corners of the product fall into the marking range of the laser. Since rotational motion is used instead of two-dimensional linear motion, the positioning can be completed while avoiding an increase in structural complexity.

[0054] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A rotary marking device, characterized in that: include: A main frame, a support assembly disposed on one side of the main frame, a rotation mechanism for driving the support assembly to rotate relative to the main frame, a pattern positioning mechanism connected to the main frame, and a marking mechanism connected to the main frame; the pattern positioning mechanism includes a camera disposed on one side of the main frame; the marking mechanism includes a laser disposed on one side of the main frame; the camera and the laser are distributed along a circumference with the axis of the rotation mechanism as the center; The camera is used to capture the positioning mark on the product when the rotating mechanism drives the product mounted on the supporting assembly to rotate for detection; The rotation mechanism is used to rotate the positioning mark of the product to coincide with the preparation station after the camera detects the positioning mark on the product, and then drive the product to perform directional rotation so that the part of the product in the preparation station is rotated to the processing station; The laser is used to mark the portion of the product in the processing station; The camera is further configured to capture the next positioning mark during the directional rotation of the product, and record the positioning mark detected during the directional rotation as a compact processing mark; The rotation mechanism is also used to drive the product to rotate in the opposite direction after completing a marking process, if the compact processing mark is recorded, so that the part of the product with the compact processing mark coincides with the preparation station, and then drive the product to rotate in a directional manner again, so that the part of the product in the preparation station is rotated to the processing station for the next marking process.

2. The rotary marking device according to claim 1, characterized in that: The support assembly includes a supporting panel rotatably arranged on the upper side of the main frame; the rotating mechanism includes a rotating motor installed in the main frame; the supporting panel rotates along with the output shaft of the rotating motor.

3. The rotary marking device according to claim 2, characterized in that: A plurality of vacuum suction holes are provided on the surface side of the supporting panel.

4. The rotary marking device according to claim 2, characterized in that: The support assembly further includes a plurality of clamps disposed near edges of the support panel.

5. The rotary marking device according to claim 2, characterized in that: The graphic positioning mechanism also includes a positioning bracket arranged on the upper side of the main frame, and a positioning adjustment platform connected to the positioning bracket; the positioning adjustment platform includes a side guide rail connected to one side of the positioning bracket, a first slider slidably connected to the side guide rail, and a first locking screw passing through the first slider; the camera is connected to the first slider.

6. The rotary marking device according to claim 5, characterized in that: The positioning and adjustment platform also includes a second slider slidably connected to the side guide rail and a second locking screw passing through the second slider; the second slider is located on the lower side of the first slider; the graphic positioning mechanism also includes a light source connected to the second slider.

7. The rotary marking device according to claim 2, characterized in that: The marking mechanism also includes a processing adjustment component connected to the main frame; the processing adjustment component includes a vertical frame arranged on the upper side of the main frame, a screw rod rotatably arranged in the vertical frame, a rotating handle connected to the upper end of the screw rod, a third slider engaged with the screw rod thread, and a lifting plate connected to the third slider; the laser is connected to the lifting plate.

8. The rotary marking device according to claim 7, characterized in that: The laser is located on the upper side of the lifting plate; the marking mechanism further comprises a vacuum cleaner connected to the lower side of the lifting plate; the suction port of the vacuum cleaner is arranged close to the light outlet of the laser.

9. The rotary marking device according to claim 1, characterized in that: The pattern positioning mechanism also includes a lens installed near the light-sensing port of the camera.

10. A rotary marking method, characterized in that: The steps include: The rotating mechanism drives the product mounted on the support assembly to rotate for inspection, and the camera captures the positioning marks on the product; After the camera detects the positioning mark on the product, the rotation mechanism rotates the positioning mark of the product to coincide with the preparation station; The rotating mechanism drives the product to perform directional rotation, so that the part of the product in the preparation station is rotated to the processing station; The laser performs marking processing on the portion of the product located in the processing station; The camera captures the next positioning mark during the directional rotation of the product, and records the positioning mark detected during the directional rotation as a compact processing mark; After completing a marking process, if the compact processing mark is recorded, the rotating mechanism drives the product to rotate in the opposite direction, so that the part of the product with the compact processing mark coincides with the preparation station, and then drives the product to rotate in a directional manner again, so that the part of the product in the preparation station is rotated to the processing station for the next marking process.

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