A multi-channel composite laser marking device

Abstract

The present invention discloses a multi-channel composite laser marking device, which relates to the technical field of laser marking. It includes a bench, a bottom guard plate is fixedly connected to the side surface of the bench, a support frame is fixedly connected to the top end of the bench, protective covers are arranged on both the front and rear sides of the support frame, a laser marking mechanism is arranged below the support frame, a centering mechanism is arranged below the laser marking mechanism, a control mechanism is arranged at the front end of the centering mechanism, and a conveyor belt is arranged below the control mechanism; the laser marking mechanism includes a ventilation structure and a gas protection structure; the ventilation structure includes a ventilation pipe, the ventilation pipe is fixedly connected to the front side surface of the galvanometer module, a bent ejector rod is arranged inside the ventilation pipe, a sealing piece is fixedly connected to the top end of the bent ejector rod, and a connecting pipe is fixedly connected to the outer surface of the ventilation pipe. In the present invention, nitrogen or carbon dioxide is ejected to prevent oxidation or material damage.

Description

Technical Field

[0001] The present invention relates to the technical field of laser marking, and particularly to a multi-channel composite laser marking device. Background Art

[0002] The multi-channel design enables the laser marking device to perform multiple marking operations simultaneously. Each channel can operate independently, thus being able to handle a variety of different process requirements and greatly improving production efficiency. This design is widely used in scenarios with high output requirements on production lines. It not only improves production efficiency but also can adapt to different types of materials and marking requirements. With the development of intelligent and automated technologies, the application of such equipment in industrial production will be more extensive, especially in fields with high requirements for efficiency and precision, where it has obvious advantages.

[0003] The patent with publication number CN113182666B discloses a laser marking device. This laser marking device is used to mark a headphone case. The headphone case is provided with a socket. The laser marking device includes a workbench, a horizontal displacement mechanism, a carrier mechanism, a plugging and unplugging reading mechanism, and a marking mechanism. The horizontal displacement mechanism is arranged on the workbench and between the loading area and the unloading area. The carrier mechanism is arranged on the horizontal displacement mechanism and is used for fixedly installing the headphone case. The horizontal displacement mechanism is used to drive the carrier mechanism to move between the loading area and the unloading area. The plugging and unplugging reading mechanism includes a plug, and the plugging and unplugging reading mechanism is used to plug or separate the plug from the socket to read the code to be marked on the headphone case. The marking mechanism is electrically connected to the plugging and unplugging reading mechanism, and the marking mechanism is used to mark the headphone case according to the read code to be marked, so as to form a coded mark on the headphone case. The laser marking device of this invention can improve the efficiency of marking the headphone case, but this patent has the problem that when laser marking a metal material, the marked area is prone to oxidation damage to the parts. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a multi-channel composite laser marking device, which solves the problems raised in the above background art.

[0005] To achieve the above purposes, the present invention is realized through the following technical solutions: A multi-channel composite laser marking device includes a frame. A bottom guard plate is fixedly connected to the side of the frame. A support frame is fixedly connected to the top of the frame. Protective covers are arranged on both the front and rear sides of the support frame. A laser marking mechanism is arranged below the support frame. A centering mechanism is arranged below the laser marking mechanism. A control mechanism is arranged at the front end of the centering mechanism. A conveyor belt is arranged below the control mechanism.

[0006] The laser marking mechanism includes a ventilation structure and a gas protection structure.

[0007] The ventilation structure includes an air pipe, the air pipe is fixedly connected to the front side of the galvanometer module, a bent ejector rod is arranged inside the air pipe, a sealing piece is fixedly connected to the top end of the bent ejector rod, a connecting pipe is fixedly connected to the outer surface of the air pipe, and a heat dissipation spiral pipe is fixedly connected to one end of the connecting pipe away from the air pipe. The gas protection structure includes a protective cover, a sealing groove ring is slidably connected inside the protective cover, four groove ring vertical rods are fixedly connected to the bottom surface of the sealing groove ring, and a pressure receiving piece is fixedly connected to the bottom ends of the four groove ring vertical rods.

[0008] According to the above technical solution, the laser marking mechanism includes two screw frames, the two screw frames are respectively fixedly connected to the left and right sides of the support frame, a lifting screw is rotatably connected to the middle of each screw frame, a lifting slide plate is threadedly connected to the outer surface of the lifting screw, a lifting motor is installed at the top end of the support frame, a linkage cross frame is fixedly connected between the two lifting slide plates, a plurality of module frames are fixedly connected to the upper surface of the linkage cross frame, and a galvanometer module is fixedly connected to the inside of the module frame.

[0009] According to the above technical solution, the conveyor belt is fixedly connected to the protective cover, a table board is fixedly connected to the bottom surface of the conveyor belt, the output shaft of the lifting motor is fixedly connected to the lifting screw, and the heat dissipation spiral pipe is located inside the galvanometer module.

[0010] According to the above technical solution, a return spring is provided on the top surface of the sealing groove ring, and the two ends of the return spring are fixedly connected to the protective cover and the sealing groove ring respectively, the bent top rod is fixedly connected to the top surface of the sealing groove ring, the bent top rod is slidably connected to the ventilation pipe, and the ventilation pipe is fixedly connected to the protective cover. When the product directly below is laser marked by the galvanometer module, the lifting motor is controlled by the control terminal to drive the lifting slide to slide downward along the screw frame, and the connected linkage cross frame is driven by the lifting slide to move downward together with the module frame, so that the galvanometer module connected to the module frame is close to the product directly below and the focal length is adjusted. As the module frame moves downward, the module frame will drive the connected ventilation pipe to move downward, so that the protective cover connected to the ventilation pipe gradually approaches the upper surface of the product. When the pressure piece on the bottom surface of the protective cover contacts the upper surface of the product, the pressure piece is pressed to push the connected groove The ring vertical rod makes the groove ring vertical rod slide along the bottom surface of the protective cover and push the sealing groove ring upward and squeeze the reset spring. The sealing groove ring moves up and is staggered with the ring groove opened in the protective cover, allowing nitrogen or carbon dioxide to be input into the protective cover through the ventilation pipe and then sprayed out from the ring groove through the protective cover. At the same time, during the upward movement of the sealing groove ring, the sealing groove ring pushes the connected bent top rod to move, so that the bent top rod drives the sealing piece to block the connecting pipe to prevent nitrogen or carbon dioxide from entering the heat dissipation spiral tube along the connecting pipe. When the protective cover moves upward with the galvanometer module, the pressure-bearing piece at the bottom of the protective cover resets downward under the action of the reset spring. At this time, the sealing groove ring pulls the sealing piece connected to the bent top rod to separate from the connecting pipe, allowing a small amount of gas in the ventilation pipe to enter the heat dissipation spiral tube through the connecting pipe and be sprayed out through the heat dissipation spiral tube. The heat generated in the galvanometer module is taken away by the gas passing through the heat dissipation spiral tube.

[0011] The transmission mechanism is a kind of frame structured in accordance with the present invention, and the frame body has the shape of a circle, and the frame body has a circle, and the circle has a rotation sprocket wheel, the middle portion of which is provided with a wheel gear.

[0012] According to the above technical solution, the driving wheel and the driven wheel form a transmission structure through a transmission belt. The driven wheel is rotationally connected to the conveyor belt. An inclined chute is provided on the bottom surface of the inclined chute flap. The carriage is fixedly connected to the inclined chute flap. A buffer spring is provided between the middle fixed plate and the thrust plate, and both ends of the buffer spring are fixedly connected to the thrust plate and the middle fixed plate respectively. When the conveyor belt is in a working state, the rotation of the conveyor belt drives the connected driving wheel to rotate. The driving wheel drives the driven wheel through the transmission belt, causing the swing handle connected to the driven wheel to rotate. The rotating swing handle drives the hinge shaft rod to move. When the protrusion of the swing handle rotates from the due front to the due rear, the swing handle pulls the hinge shaft rod to move at this time. The hinge shaft rod drives the transverse push rod to move horizontally along the bottom side of the fixed square tube under force. At this time, the inclined chute slide rod connected to the transverse push rod passes through the placement plate and slides along the inclined chute on the inclined chute flap. The inclined chute flap is pushed by the inclined chute slide rod, causing the carriage to move away from the conveyor belt along the slide rail on the placement plate. At this time, the thrust plate moves away from the clamped product and resets along with the connected buffer slide rod as the inclined chute flap moves away. When the protrusion of the swing handle rotates from the due rear to the due front downward, the swing handle pushes the connected hinge shaft rod at this time. The hinge shaft rod is forced to push the transverse push rod to slide, and the inclined chute slide rod connected to the transverse push rod slides along the inclined chute of the inclined chute flap. At this time, the inclined chute flap drives the connected carriage to approach the connected conveyor belt along the slide rail. The inclined chute flap pushes the thrust plate to gradually approach the product through the buffer spring installed on the middle fixed plate, and pushes the product to the middle position of the conveyor belt through the thrust plate. At the same time, with the continuous pushing of the inclined chute flap, the thrust plate in contact with the product stops moving due to the resistance of the product and slides along the inclined chute flap by applying a reaction force through the connected buffer slide rod. At this time, the thrust plate compresses the buffer spring, and the thrust plate always contacts the edge of the product for positioning.

[0013] According to the above technical solution, the control mechanism includes a thin push rod. The thin push rod is fixedly connected to the bottom surface of the inclined chute slide rod. One end of the thin push rod away from the inclined chute slide rod is fixedly and slidably connected to a retractable rod. Above one end of the retractable rod away from the thin push rod, there is a top pressure plate. Above the top pressure plate, there is a tipping bucket. A limiting plate is fixedly connected to the inner wall of the front end of the tipping bucket. A downward slide plate is slidably connected inside the limiting plate. A bent connecting rod is fixedly connected to the bottom surface of the front end of the conveyor belt. A telescopic slide plate is slidably connected to the bottom surface of the front end of the tipping bucket.

[0014] According to the above technical solution, the top extension of the bending connecting rod is arc-shaped, the bending connecting rod is slidably connected to the tipping bucket, a contraction spring is arranged inside the limit plate, and the two ends of the contraction spring are respectively fixedly connected to the limit plate and the sliding card plate, and the connected thin push rod is pushed to move while the transverse push rod slides. When the thin push rod moves a certain distance, the thin push rod will push the connected inner retraction rod to move, and the inner retraction rod will push the top pressure plate after the movement, and the top pressure plate will drive the tipping bucket to tip over, and the inclined groove folding plate will be lifted by the tipping bucket tipping, and the telescopic slide plate will slide along the contact point of the conveyor belt and tip over into the tipping bucket, and when the height below the sliding card plate is higher than the surface of the conveyor belt, the product passing through the inner groove of the tipping bucket will slide from the bottom of the tipping bucket to the surface of the conveyor belt, and then the conveyor belt will stop moving. The thrust plate is in a clamping state. After the product slides from under the sliding pallet, the sliding pallet will slide down and reset along the limit plate under the action of the contraction spring. The sliding pallet blocks the movement of the remaining products in the tipping bucket. Then the conveyor belt continues to rotate, and the thrust plate gradually releases the clamping product. The product that slides down from the tipping bucket moves driven by the conveyor belt. At this time, the thin push rod moves with the transverse push rod, and the inner retraction rod lacks the support of the thin push rod and resets under the gravity of the tipping bucket. After the tipping bucket is reset, it contacts the bent connecting rod, so that the bent connecting rod passes through the tipping bucket and supports the sliding pallet, allowing the sliding pallet to move up along the limit plate. At this time, the product in the tipping bucket will slide along the inclined surface to the bottom of the sliding pallet, and the tipping bucket will be flipped upward by the transverse push rod, allowing the product under the sliding pallet to slide and fall to the top of the conveyor belt under the action of gravity.

[0015] The present invention provides a multi-channel composite laser marking device, which has the following beneficial effects:

[0016] The present invention is provided with a screw frame, a lifting screw, a lifting motor, a lifting slide plate, a linkage horizontal frame, a module frame, a galvanometer module, a ventilation structure, and a gas protection structure, so that the nitrogen or carbon dioxide is sprayed to prevent oxidation or material damage. Especially in the marking process of metal materials, the selection and flow rate of different gases will affect the final marking effect, so that the sprayed gas covers the marking position of the product, prevents the oxidation of the metal parts, and can blow away the smoke generated by the laser marking. At the same time, the gas passing through the heat dissipation spiral tube takes away the heat generated in the galvanometer module, which has a cooling effect on the galvanometer module in a working state for a long time, and prevents the laser in the galvanometer module from overheating and affecting the marking stability.

[0017] In the present invention, by providing a driving wheel, a transmission belt, a transmission wheel, a swing handle, an inclined chute slide rod, a fixed square tube, a placing plate, an inclined chute folding plate, and a transverse push rod, the product is pushed to the middle position of the conveyor belt through a thrust plate, so that the marking position and angle of the galvanometer module are kept consistent, avoiding the influence of product inclination on the marking effect and preventing the influence of different marking positions of the product on the depth of the marking pattern lines. At the same time, the thrust plate always contacts the edge of the product for positioning, and the positioning is fixed to avoid the influence of deviation caused by mechanical vibration during the marking process on the marking effect;

[0018] In the present invention, by providing a retractable rod, a top pressing plate, a tipping bucket, a limiting plate, a downward sliding clamping plate, a bent connecting rod, and a telescopic sliding plate, the tipping bucket is turned upward through a transverse push rod, so that the product below the downward sliding clamping plate slides down under the action of gravity to above the conveyor belt, realizing automatic feeding. At the same time, the conveyor belt is used for automatic feeding, and the interval for the conveyor belt to transport the product is controlled to be consistent, improving the working efficiency of product laser marking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front three-dimensional structural schematic diagram of the whole of the present invention;

[0020] Figure 2 is a rear three-dimensional structural schematic diagram of the whole of the present invention;

[0021] Figure 3 is a structural schematic diagram of the overall mechanism position distribution of the present invention;

[0022] Figure 4 is a structural schematic diagram of the overall laser marking mechanism of the present invention;

[0023] Figure 5 is the whole of the present invention Figure 4 and is an enlarged structural schematic diagram of A therein;

[0024] Figure 6 is an internal schematic diagram of the overall ventilation structure of the present invention;

[0025] Figure 7 is a structural schematic diagram of the overall centering mechanism of the present invention;

[0026] Figure 8 is a structural schematic diagram of the connection structure of the overall inclined chute folding plate of the present invention;

[0027] Figure 9 is a structural schematic diagram of the overall control mechanism of the present invention.

[0028] In the figure: 1. Bench; 2. Bottom guard plate; 3. Protective cover; 4. Support frame; 5. Laser marking mechanism; 51. Screw frame; 52. Lifting screw; 53. Lifting motor; 54. Lifting slide plate; 55. Linkage cross frame; 56. Module frame; 57. Galvo module; 58. Ventilation structure; 581. Vent pipe; 582. Sealing piece; 583. Bent ejector rod; 584. Connecting pipe; 585. Heat dissipation spiral pipe; 59. Gas protection structure; 591. Protective cover; 592. Sealing groove ring; 593. Groove ring vertical rod; 594. Compressed piece; 6. Centering mechanism; 61. Driving wheel; 62. Transmission belt; 63. Driving wheel; 64. Swing handle; 65. Oblique groove slide bar; 66. Fixed square pipe; 67. Placing plate; 68. Oblique groove folding plate; 69. Transverse push rod; 610. Hinge shaft rod; 611. Slide rail; 612. Slide frame; 613. Buffer slide bar; 614. Thrust plate; 615. Central fixing plate; 7. Control mechanism; 71. Thin push rod; 72. Retractable rod; 73. Top pressing plate; 74. Flipping bucket; 75. Limit plate; 76. Lower slide clamping plate; 77. Bent connecting rod; 78. Telescopic slide plate; 8. Conveyor belt. Detailed implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] Please refer to Figure 1-9 , an embodiment of the present invention is: a multi-channel composite laser marking device, including a bench 1, a bottom guard plate 2 is fixedly connected to the side of the bench 1, a support frame 4 is fixedly connected to the top of the bench 1, protective covers 3 are arranged on both the front and rear sides of the support frame 4, a laser marking mechanism 5 is arranged below the support frame 4, a centering mechanism 6 is arranged below the laser marking mechanism 5, a control mechanism 7 is arranged at the front end of the centering mechanism 6, and a conveyor belt 8 is arranged below the control mechanism 7;

[0031] The laser marking mechanism 5 includes a ventilation structure 58 and a gas protection structure 59;

[0032] The ventilation structure 58 includes a vent pipe 581, the vent pipe 581 is fixedly connected to the front side of the galvo module 57, a bent ejector rod 583 is arranged inside the vent pipe 581, a sealing piece 582 is fixedly connected to the top end of the bent ejector rod 583, a connecting pipe 584 is fixedly connected to the outer surface of the vent pipe 581, the end of the connecting pipe 584 away from the vent pipe 581 is fixedly connected to a heat dissipation spiral pipe 585, the gas protection structure 59 includes a protective cover 591, a sealing groove ring 592 is slidably connected inside the protective cover 591, four groove ring vertical rods 593 are fixedly connected to the bottom surface of the sealing groove ring 592, and a compressed piece 594 is fixedly connected to the bottom ends of the four groove ring vertical rods 593.

[0033] The laser marking mechanism 5 includes two screw frames 51, which are fixedly connected to the left and right sides of the support frame 4 respectively. A lifting screw 52 is rotatably connected to the middle part of each screw frame 51, and a lifting slide 54 is threadedly connected to the outer surface of the lifting screw 52. A lifting motor 53 is installed on the top of the support frame 4. A linkage cross frame 55 is fixedly connected between the two lifting slides 54. A plurality of module frames 56 are fixedly connected to the upper surface of the linkage cross frame 55. A galvanometer module 57 is fixedly connected to the inner side of the module frame 56. The conveyor belt 8 is fixedly connected to the protective cover 3. The bottom surface of the conveyor belt 8 is fixedly connected to the table. The output shaft of the lifting motor 53 is fixedly connected to the lifting screw 52. The heat dissipation spiral tube 585 is located inside the galvanometer module 57. The sealing groove ring A return spring is provided on the top surface of 592, and the two ends of the return spring are fixedly connected to the protective cover 591 and the sealing groove ring 592 respectively, the bent top rod 583 is fixedly connected to the top surface of the sealing groove ring 592, the bent top rod 583 is slidably connected to the ventilation pipe 581, the ventilation pipe 581 is fixedly connected to the protective cover 591, and the lifting slide plate 54 drives the connected linkage cross frame 55 and the module frame 56 to move downward together, so that the galvanometer module 57 connected to the module frame 56 is close to the product directly below and adjusts the focal length. As the module frame 56 moves downward, the module frame 56 will drive the connected ventilation pipe 581 to move downward, so that the protective cover 591 connected to the ventilation pipe 581 gradually approaches the upper surface of the product. When the pressure piece 594 on the bottom surface of the protective cover 591 is in contact with the product, the pressure piece 594 on the bottom surface of the protective cover 591 is in contact with the product. When the upper surface contacts, the connected groove ring vertical rod 593 is pushed by the pressure piece 594, so that the groove ring vertical rod 593 slides along the bottom surface of the protective cover 591 and pushes the sealing groove ring 592 upward and squeezes the reset spring. The sealing groove ring 592 moves upward and staggers with the ring groove opened in the protective cover 591, so that nitrogen or carbon dioxide is input into the protective cover 591 through the vent pipe 581, and then sprayed out from the ring groove through the protective cover 591, so that the sprayed nitrogen or carbon dioxide can prevent oxidation or material damage. Especially in the marking process of metal materials, the selection and flow of different gases will affect the final marking effect, so that the sprayed gas covers the marking position of the product, prevents the oxidation of the metal parts, and can blow away the smoke generated by the laser marking. At the same time, the sealing groove ring 592 During the upward movement, the sealing groove ring 592 pushes the connected bent top rod 583 to move, so that the bent top rod 583 drives the sealing piece 582 to block the connecting pipe 584, preventing nitrogen or carbon dioxide from entering the heat dissipation spiral tube 585 along the connecting pipe 584. When the protective cover 591 moves upward with the galvanometer module 57, the pressure piece 594 at the bottom of the protective cover 591 is reset downward under the action of the reset spring. At this time, the sealing groove ring 592 pulls the sealing piece 582 connected to the bent top rod 583 to separate from the connecting pipe 584, allowing a small amount of gas in the ventilation pipe 581 to enter the heat dissipation spiral tube 585 through the connecting pipe 584 and be ejected through the heat dissipation spiral tube 585. The gas passing through the heat dissipation spiral tube 585 takes away the heat generated in the galvanometer module 57.It plays a role in cooling the galvanometer module 57 that has been in a working state for a long time, preventing the laser in the galvanometer module 57 from overheating and affecting the marking stability.

[0034] The centering mechanism 6 includes a driving wheel 61, which is installed on the rear side of the conveyor belt 8. A transmission belt 62 is arranged on the outer side of the driving wheel 61. A transmission wheel 63 is arranged in front of the driving wheel 61. A swing handle 64 is fixedly connected to the side of the transmission wheel 63 away from the conveyor belt 8. An eccentric shaft is arranged inside the swing handle 64, and a hinge shaft rod 610 is rotatably connected to the outer surface of the eccentric shaft. One end of the hinge shaft rod 610 away from the swing handle 64 is hinged to a transverse push rod 69. One end of the transverse push rod 69 away from the hinge shaft rod 610 is fixedly connected to an inclined groove slide rod 65. The top end of the inclined groove slide rod 65 is slidably connected to an inclined groove folding plate 68. A fixed square tube 66 is fixedly connected to the middle of the side of the conveyor belt 8. A placement plate 67 is fixedly connected to the side of the fixed square tube 66. A slide rail 611 is fixedly connected to the upper surface of the placement plate 67. A slide frame 612 is slidably connected to the outer surface of the slide rail 611. A buffer slide rod 613 is slidably connected to the side of the inclined groove folding plate 68 of the slide frame 612. One end of the buffer slide rod 613 close to the conveyor belt 8 is fixedly connected to a thrust plate 614. A middle fixed plate 615 is fixedly connected to the middle of the top end of the inclined groove folding plate 68. The driving wheel 61 and the transmission wheel 63 form a transmission structure through the transmission belt 62, and the transmission wheel 63 is rotatably connected to the conveyor belt 8. An inclined chute is formed on the bottom surface of the inclined groove folding plate 68. The slide frame 612 is fixedly connected to the inclined groove folding plate 68. A buffer spring is arranged between the middle fixed plate 615 and the thrust plate 614, and the two ends of the buffer spring are respectively fixedly connected to the thrust plate 614 and the middle fixed plate 615. When the protrusion of the swing handle 64 rotates upward from the due front to the due rear, at this time, the swing handle 64 will pull the hinge shaft rod 610 to move. The hinge shaft rod 610 will drive the transverse push rod 69 to move horizontally along the bottom side of the fixed square tube 66 when it is stressed. At this time, the inclined groove slide rod 65 connected to the transverse push rod 69 passes through the placement plate 67 and slides along the inclined chute on the inclined groove folding plate 68. The inclined groove folding plate 68 is pushed by the inclined groove slide rod 65, so that the slide frame 612 moves away from the conveyor belt 8 along the slide rail 611 on the placement plate 67. At this time, the thrust plate 614 moves away from the clamped product for reset through the connected buffer slide rod 613 along with the inclined groove folding plate 68. When the protrusion of the swing handle 64 rotates downward from the due rear to the due front, at this time, the swing handle 64 pushes the connected hinge shaft rod 610. The hinge shaft rod 610 is stressed to push the transverse push rod 69 to slide, and makes the inclined groove slide rod 65 connected to the transverse push rod 69 slide along the inclined chute of the inclined groove folding plate 68. At this time, the inclined groove folding plate 68 drives the connected slide frame 612 to approach the connected conveyor belt 8 along the slide rail 611. The inclined groove folding plate 68 pushes the thrust plate 614 to gradually approach the product through the buffer spring installed on the middle fixed plate 615, and pushes the product to the middle position of the conveyor belt 8 through the thrust plate 614, so as to keep the marking position and angle of the galvanometer module 57 consistent, avoid the influence of product inclination on the marking effect, and prevent the influence of different marking positions of the product on the depth of the marking pattern lines. At the same time, with the continuous pushing of the inclined groove folding plate 68, the thrust plate 614 in contact with the product stops moving due to the resistance of the product, and slides along the inclined groove folding plate 68 by applying a reaction force through the connected buffer slide rod 613.At this time, the thrust plate 614 squeezes the buffer spring, and the thrust plate 614 always contacts the edge of the product for positioning, and the positioning and fixing can prevent the marking process from being offset due to mechanical vibration and affecting the marking effect.

[0035] The control mechanism 7 includes a thin push rod 71, which is fixedly connected to the bottom surface of the inclined groove slide rod 65, and the end of the thin push rod 71 away from the inclined groove slide rod 65 is fixedly slidably connected to an inward retracting rod 72, and a top pressure plate 73 is arranged above the end of the inward retracting rod 72 away from the thin push rod 71, and a tipping bucket 74 is arranged above the top pressure plate 73. The front end inner wall of the tipping bucket 74 is fixedly connected to a limiting plate 75, and the inner part of the limiting plate 75 is slidably connected to a sliding card plate 76. The front end bottom surface of the conveyor belt 8 is fixedly connected to a bending connecting rod 77, and the front end bottom surface of the tipping bucket 74 is slidably connected to a telescopic slide plate 78. The top extension of the bending connecting rod 77 The cam 76 is in the form of an arc, the bent connecting rod 77 is slidably connected to the tipping bucket 74, a contraction spring is arranged inside the limit plate 75, and the two ends of the contraction spring are fixedly connected to the limit plate 75 and the sliding card plate 76 respectively. When the thin push rod 71 moves a certain distance, the thin push rod 71 will push the connected inner retracted rod 72 to move, and the inner retracted rod 72 will push the top pressure plate 73 after the movement, and let the top pressure plate 73 drive the tipping bucket 74 to flip, and the tilted slot folding plate 68 is lifted by the flipping of the tipping bucket 74, and the telescopic slide plate 78 slides and shrinks into the tipping bucket 74 along the contact point of the conveyor belt 8. When the height below the sliding card plate 76 is higher than the surface of the conveyor belt 8, The products passing through the inner groove of the tipping bucket 74 will slide from the bottom of the tipping bucket 74 to the surface of the conveyor belt 8, and then the conveyor belt 8 stops moving, and the thrust plate 614 is in a clamping state. After the products slide from under the sliding card plate 76, the sliding card plate 76 will slide down and reset along the limit plate 75 under the action of the contraction spring, and the sliding card plate 76 blocks the movement of the remaining products in the tipping bucket 74. Then the conveyor belt 8 continues to rotate, and the thrust plate 614 gradually releases the clamping products. The products sliding off the tipping bucket 74 move driven by the conveyor belt 8. At this time, the thin push rod 71 moves with the transverse push rod 69, and the inner retracted rod 72 lacks the support of the thin push rod 71 and The tipping bucket 74 is reset under the action of gravity. After the tipping bucket 74 is reset, it contacts the bent connecting rod 77, so that the bent connecting rod 77 passes through the tipping bucket 74 and supports the sliding card plate 76, allowing the sliding card plate 76 to move up along the limit plate 75. At this time, the products in the tipping bucket 74 will slide along the inclined surface to the bottom of the sliding card plate 76, and the tipping bucket 74 is turned upward by the horizontal push rod 69, so that the products under the sliding card plate 76 slide and fall to the top of the conveyor belt 8 under the action of gravity, realizing automatic unloading. At the same time, the conveyor belt 8 is used for automatic unloading, and the interval of the products transmitted by the conveyor belt 8 is controlled to remain consistent, thereby improving the working efficiency of product laser marking.

[0036] Working principle: When the product directly below is laser-marked by the galvanometer module 57, the lifting motor 53 is controlled by the control terminal to drive the lifting slide 54 to slide downward along the screw frame 51, and the lifting slide 54 drives the connected linkage cross frame 55 and the module frame 56 to move downward together, so that the galvanometer module 57 connected to the module frame 56 is close to the product directly below and adjusts the focal length. As the module frame 56 moves downward, the module frame 56 will drive the connected ventilation pipe 581 to move downward, so that the protective cover 591 connected to the ventilation pipe 581 gradually approaches the upper surface of the product. When the pressure-bearing sheet 594 on the bottom of the protective cover 591 contacts the upper surface of the product, the pressure-bearing sheet 594 pushes the connected groove ring vertical rod 593, so that the groove ring vertical rod 593 slides along the bottom surface of the protective cover 591 and pushes the sealing groove ring 592 upward and squeezes the return spring. The sealing groove ring 592 moves upward and staggers with the ring groove of the protective cover 591, allowing nitrogen or carbon dioxide to be input into the protective cover 591 through the vent pipe 581, and then sprayed out from the ring groove through the protective cover 591, so that the sprayed nitrogen or carbon dioxide can prevent oxidation or material damage, especially on metal During the material marking process, the selection and flow of different gases will affect the final marking effect, so that the gas is sprayed to cover the marking position of the product, preventing the metal parts from being oxidized and blowing away the smoke generated by the laser marking. At the same time, during the upward movement of the sealing ring 592, the sealing ring 592 pushes the connected bending top rod 583 to move, so that the bending top rod 583 drives the sealing piece 582 to block the connecting pipe 584, preventing nitrogen or carbon dioxide from entering the heat dissipation spiral tube 585 along the connecting pipe 584. When the protective cover 591 moves upward with the galvanometer module 57, the protective cover 591 The pressure piece 594 at the bottom of the cover 591 is reset downward under the action of the reset spring. At this time, the sealing groove ring 592 pulls the sealing piece 582 connected to the bent top rod 583 to separate from the connecting pipe 584, so that a small amount of gas in the vent pipe 581 can enter the heat dissipation spiral pipe 585 through the connecting pipe 584 and be ejected through the heat dissipation spiral pipe 585. The gas passing through the heat dissipation spiral pipe 585 takes away the heat generated in the galvanometer module 57, which has a cooling effect on the galvanometer module 57 that is in working state for a long time, and prevents the laser in the galvanometer module 57 from overheating and affecting the marking stability;

[0037] When the conveyor belt 8 is in the working state, the rotation of the conveyor belt 8 drives the rotation of the connected driving wheel 61. The driving wheel 61 drives the transmission wheel 63 through the transmission belt 62, causing the swing handle 64 connected to the transmission wheel 63 to rotate. The rotating swing handle 64 drives the hinge shaft rod 610 to move. When the protrusion of the swing handle 64 rotates from the due front to the due rear, the swing handle 64 will pull the hinge shaft rod 610 to move at this time. The hinge shaft rod 610 will drive the horizontal push rod 69 to move horizontally along the bottom side of the fixed square tube 66 when it is stressed. At this time, the inclined groove slide rod 65 connected to the horizontal push rod 69 passes through the placement plate 67 and slides along the inclined chute on the inclined chute folding plate 68. The inclined chute folding plate 68 is pushed by the inclined groove slide rod 65, causing the carriage 612 to move away from the conveyor belt 8 along the slide rail 611 on the placement plate 67. At this time, the thrust plate 614 is reset away from the clamped product along with the inclined chute folding plate 68 through the connected buffer slide rod 613. When the protrusion of the swing handle 64 rotates from the due rear to the due front, the swing handle 64 pushes the connected hinge shaft rod 610 at this time. The hinge shaft rod 610 is stressed and pushes the horizontal push rod 69 to slide, and makes the inclined groove slide rod 65 connected to the horizontal push rod 69 slide along the inclined chute of the inclined chute folding plate 68. At this time, the inclined chute folding plate 68 drives the connected carriage 612 to approach the connected conveyor belt 8 along the slide rail 611. The inclined chute folding plate 68 pushes the thrust plate 614 to gradually approach the product through the buffer spring installed on the middle fixed plate 615, and pushes the product to the middle position of the conveyor belt 8 through the thrust plate 614, so that the marking position and angle of the galvanometer module 57 are kept consistent, avoiding the influence of product inclination on the marking effect and preventing the influence of different marking positions of the product on the depth of the marking pattern lines. At the same time, with the continuous pushing of the inclined chute folding plate 68, the thrust plate 614 in contact with the product stops moving due to the resistance of the product, and slides along the inclined chute folding plate 68 by applying a reaction force through the connected buffer slide rod 613. At this time, the thrust plate 614 compresses the buffer spring, and the thrust plate 614 always contacts the edge of the product for positioning. Through positioning and fixation, the influence of mechanical vibration during the marking process on the marking effect due to deviation is avoided;

[0038] When the cam 72 is in the closed position, the push rod 74 is in the closed position, and the push rod 74 is in the closed position, so that the cam 72 ... The rear conveyor belt 8 continues to rotate, and the thrust plate 614 gradually releases the clamped products. The products that slide down from the tipping bucket 74 move under the drive of the conveyor belt 8. At this time, the thin push rod 71 moves with the transverse push rod 69. The retracted rod 72 lacks the support of the thin push rod 71 and is reset under the gravity of the tipping bucket 74. After the tipping bucket 74 is reset, it contacts the bent connecting rod 77, so that the bent connecting rod 77 passes through the tipping bucket 74 and supports the sliding card plate 76, allowing the sliding card plate 76 to move up along the limit plate 75. At this time, the products in the tipping bucket 74 will slide along the inclined surface to the bottom of the sliding card plate 76, and the tipping bucket 74 is turned upward by the transverse push rod 69, allowing the products under the sliding card plate 76 to slide and fall to the top of the conveyor belt 8 under the action of gravity, thereby realizing automatic unloading. At the same time, the automatic unloading of the conveyor belt 8 is used to control the interval of the products transmitted by the conveyor belt 8 to remain consistent, thereby improving the working efficiency of the product laser marking.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-channel composite laser marking device, comprising a bench (1), characterized in that: A bottom guard plate (2) is fixedly connected to the side of the bench (1). A support frame (4) is fixedly connected to the top of the bench (1). Protective covers (3) are arranged on both the front and rear sides of the support frame (4). A laser marking mechanism (5) is arranged below the support frame (4). A centering mechanism (6) is arranged below the laser marking mechanism (5). A control mechanism (7) is arranged at the front end of the centering mechanism (6). A conveyor belt (8) is arranged below the control mechanism (7). The laser marking mechanism (5) includes an air vent structure (58) and a gas protection structure (59). The air vent structure (58) includes an air vent pipe (581). The air vent pipe (581) is fixedly connected to the front side of the galvanometer module (57). A bent ejector rod (583) is arranged inside the air vent pipe (581). A sealing piece (582) is fixedly connected to the top end of the bent ejector rod (583). A connecting pipe (584) is fixedly connected to the outer surface of the air vent pipe (581). The end of the connecting pipe (584) far from the air vent pipe (581) is fixedly connected to a heat dissipation spiral pipe (585). The gas protection structure (59) includes a protective cover (591). A sealing groove ring (592) is slidably connected inside the protective cover (591). Four groove ring vertical rods (593) are fixedly connected to the bottom surface of the sealing groove ring (592). The bottom ends of the four groove ring vertical rods (593) are fixedly connected to a pressure receiving piece (594). The centering mechanism (6) includes a driving wheel (61). The driving wheel (61) is installed on the rear side surface of the conveyor belt (8). A transmission belt (62) is arranged outside the driving wheel (61). A transmission wheel (63) is arranged in front of the driving wheel (61). A swing handle (64) is fixedly connected to the side of the transmission wheel (63) far from the conveyor belt (8). An eccentric shaft is arranged inside the swing handle (64), and a hinge shaft rod (610) is rotatably connected to the outer surface of the eccentric shaft. The end of the hinge shaft rod (610) far from the swing handle (64) is hingedly connected to a transverse push rod (69). The end of the transverse push rod (69) far from the hinge shaft rod (610) is fixedly connected to an inclined groove sliding rod (65). The top end of the inclined groove sliding rod (65) is slidably connected to an inclined groove folding plate (68). A fixed square pipe (66) is fixedly connected to the middle of the side surface of the conveyor belt (8). A placement plate (67) is fixedly connected to the side surface of the fixed square pipe (66). A slide rail (611) is fixedly connected to the upper surface of the placement plate (67). A slide frame (612) is slidably connected to the outer surface of the slide rail (611). A buffer sliding rod (613) is slidably connected to the side surface of the inclined groove folding plate (68) of the slide frame (612). A thrust plate (614) is fixedly connected to the end of the buffer sliding rod (613) close to the conveyor belt (8). A middle fixing plate (615) is fixedly connected to the middle of the top end of the inclined groove folding plate (68). The control mechanism (7) includes a thin push rod (71), the thin push rod (71) is fixedly connected to the bottom surface of the inclined groove slide rod (65), one end of the thin push rod (71) away from the inclined groove slide rod (65) is fixedly and slidably connected with a retractable rod (72), above one end of the retractable rod (72) away from the thin push rod (71) is provided with a top pressure plate (73), above the top pressure plate (73) is provided with a tipping bucket (74), the front inner wall of the tipping bucket (74) is fixedly connected with a limiting plate (75), a downward sliding clamping plate (76) is slidably connected inside the limiting plate (75), the front bottom surface of the conveyor belt (8) is fixedly connected with a bent connecting rod (77), and a telescopic sliding plate (78) is slidably connected to the front bottom surface of the tipping bucket (74).

2. A multi-channel composite laser marking device according to claim 1, characterized in that: The laser marking mechanism (5) includes two screw frames (51), the two screw frames (51) are respectively fixedly connected to the left and right sides of the support frame (4), a lifting screw (52) is rotatably connected to the middle of each screw frame (51), a lifting sliding plate (54) is threadedly connected to the outer surface of the lifting screw (52), a lifting motor (53) is installed at the top end of the support frame (4), a linkage cross frame (55) is fixedly connected between the two lifting sliding plates (54), a plurality of module frames (56) are fixedly connected to the upper surface of the linkage cross frame (55), and a galvanometer module (57) is fixedly connected inside the module frame (56).

3. The multi-channel composite laser marking device according to claim 2, wherein: The conveyor belt (8) is fixedly connected to the protective cover (3), a table board is fixedly connected to the bottom surface of the conveyor belt (8), the output shaft of the lifting motor (53) is fixedly connected to the lifting screw (52), and the heat dissipation spiral tube (585) is located inside the galvanometer module (57).

4. A multi-channel composite laser marking device according to claim 3, characterized in that: A return spring is arranged on the top surface of the sealing groove ring (592), and two ends of the return spring are respectively fixedly connected to the protective cover (591) and the sealing groove ring (592), the bent ejector rod (583) is fixedly connected to the top surface of the sealing groove ring (592), the bent ejector rod (583) is slidably connected to the ventilation pipe (581), and the ventilation pipe (581) is fixedly connected to the protective cover (591).

5. A multi-channel composite laser marking device according to claim 4, characterized in that: The driving wheel (61) and the driven wheel (63) constitute a transmission structure through a transmission belt (62), the driven wheel (63) is rotatably connected to the conveyor belt (8), an inclined chute is formed on the bottom surface of the inclined chute plate (68), the sliding frame (612) is fixedly connected to the inclined chute plate (68), and a buffer spring is arranged between the middle fixing plate (615) and the thrust plate (614), and two ends of the buffer spring are respectively fixedly connected to the thrust plate (614) and the middle fixing plate (615).

6. The multi-channel composite laser marking device according to claim 5, characterized in that: The top extension of the bent connecting rod (77) is arc-shaped, the bent connecting rod (77) is slidably connected to the tipping bucket (74), a contraction spring is arranged inside the limiting plate (75), and two ends of the contraction spring are respectively fixedly connected to the limiting plate (75) and the downward sliding clamping plate (76).

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