Safety helmet laser positioning code printing device

Abstract

The invention relates to the technical field of safety helmet laser coding, in particular to a safety helmet laser positioning coding device which comprises a belt conveyor and an operation table, the belt conveyor is arranged on the left side of the operation table, a limiting mechanism is arranged at the upper end of the belt conveyor, and a bottom plate is installed on the inner side of the operation table. A material pushing mechanism is installed at the upper end of the bottom plate, the upper end of the material pushing mechanism penetrates through the operation table and extends to the position above the operation table, a positioning mechanism in transmission connection with the material pushing mechanism is installed at the upper end of the bottom plate, a first through groove corresponding to the position of the operation table is formed in the upper end of the operation table, and a fixing frame is installed at the upper end of the operation table. Compared with the prior art, the safety helmet positioning device is reasonable in structural design and high in practicability, safety helmets can be conveniently subjected to limiting, moving and transporting, automatic pushing and positioning operation, a first laser carving machine can conveniently conduct accurate positioning laser carving and coding, and the using effect is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser coding of safety helmets, and in particular to a laser positioning coding device for safety helmets. Background Art

[0002] Safety helmets are protective equipment used to prevent impact objects from injuring the head. They are composed of a helmet shell, a visor, a hat lining, a lower cheek strap and a back hoop. During the production process of safety helmets, the helmet shell needs to be laser engraved.

[0003] With regard to the laser engraving process of the shell of the existing safety helmet during the production process, when the shell of the safety helmet is transmitted, the shell of the safety helmet is usually transmitted to a predetermined processing position through a conveyor belt of an ordinary belt conveyor mechanism, and then the position on the safety helmet that needs to be coded is marked by a preset coding mechanism, such as marking a certain position of the shell by a laser engraving machine. In the above process, when the safety helmet is transmitted on the conveyor belt of an ordinary belt conveyor mechanism, an angle tilt change may occur, such as a certain angle offset to the left or right, which will cause a deviation in the final laser coding position, affecting the use effect.

[0004] On the other hand, after screen printing on the safety helmets in the current factory, in order to cure the paint faster and enter the next process, one or more workers are usually asked to wear flame spray guns to perform manual curing operations; this not only tests the workers' proficiency and the impact on the consistency of the curing effect of the heated area, but also because each curing is considered to be a centralized heating of multiple screen-printed safety helmets, which will also cause the corresponding assembly line production and processing efficiency to decrease.

[0005] In view of this, how to overcome the defects of the above-mentioned prior art and how to solve the technical problem that the above-mentioned helmet may produce angle inclination changes during transmission, causing the final laser coding position to deviate and affecting the use effect is a difficult problem that needs to be solved urgently in this technical field. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings existing in the prior art: the safety helmet may produce angle inclination changes during transmission, so that the final laser coding position also has deviations, affecting the use effect, and a safety helmet laser positioning coding device is proposed to solve this problem, realize the positioning of the safety helmet during transmission, so that it is not easy to change the angle inclination, and thus the final laser coding position is accurate.

[0007] Furthermore, the present invention is to solve the problem that after screen printing on a safety helmet in a current factory, in order to cure the paint faster and proceed to the next step, one or more workers are usually required to wear a flame spray gun to perform manual curing operations, which affects the efficiency of the assembly line work.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: Provided is a safety helmet laser positioning coding device, comprising a belt conveyor 1 and an operating table 3, wherein the belt conveyor 1 is arranged on one side of the operating table 3, and limit mechanisms 2 are arranged on both sides of the belt conveyor 1, a bottom plate 4 is installed in the operating table 3, a pushing mechanism 5 is installed on the bottom plate 4, and the upper end of the pushing mechanism 5 passes through the operating table 3 and extends above it, and a positioning mechanism 6 drivingly connected to the pushing mechanism 5 is also installed on the bottom plate 4, and a first through groove 15 corresponding to the position of the positioning mechanism 6 is arranged on the operating table 3, and a fixing frame 8 is also installed on the operating table 3, and a first laser engraving machine 13 is installed on the first side of the fixing frame 8 through a first inclined plate 12, and the first laser engraving machine 13 faces the first side of the safety helmet to be printed; The limiting mechanism 2 includes a base frame 21 installed at the lower end of the belt conveyor 1, the lower end of the base frame 21 is connected to a first servo motor 23 through a second mounting plate 22, the output end of the first servo motor 23 is connected to a driving shaft 24, a circular gear 25 is installed on the outer side of the driving shaft 24, the upper and lower sides of the circular gear 25 are meshed with tooth plates 26, the upper ends of the tooth plates 26 are connected to connecting rods 27, one side of the connecting rods 27 passes through the belt conveyor 1 through a connecting column 28 and is connected to a limiting plate 29; The pushing mechanism 5 includes two fixed shafts 56 rotatably mounted on the upper end of the bottom plate 4, and second gears 55 meshing with each other are mounted on the outer side of the fixed shafts 56. A second servo motor 54 is mounted on the upper end of the bottom plate 4. Two supporting shafts 51 are movably plugged on the upper end of the operating table 3, and push rods 52 are connected to the outer sides of the supporting shafts 51. The lower end of one of the supporting shafts 51 is connected to the output end of the second servo motor 54, and the lower end of the other supporting shaft 51 is rotatably connected to the bottom plate 4. First gears 53 are mounted on the outer sides of the supporting shafts 51, and each of the first gears 53 meshes with one of the second gears 55. The positioning mechanism 6 includes a screw rod 61 rotatably mounted on the upper end of the base plate 4, a pulley 62 is mounted on the outer side of the screw rod 61 and one of the fixed shafts 56, a belt 63 is sleeved on the outer side of the pulley 62, a threaded block 64 is screwed on the outer side of the screw rod 61, a positioning plate 65 is connected to one side of the threaded block 64, and the positioning plate 65 matches the position of the first through groove 15.

[0009] In some embodiments, a positioning column 66 is connected to the lower end of the operating table 3 , and the lower end of the positioning column 66 is movably plugged into the threaded block 64 .

[0010] In some embodiments, one side of the connecting rod 27 is connected to a first limiting column 211 , and one end of the first limiting column 211 is movably plugged into the bottom frame 21 .

[0011] In some embodiments, two groups of second limiting columns 210 are installed on the outer side of the limiting plate 29, and one end of the second limiting column 210 movably passes through the belt conveyor 1 and extends to the outer side thereof.

[0012] In some embodiments, a discharging mechanism 7 is installed below the operating table 3, and the discharging mechanism 7 includes a third mounting plate 71 installed at the lower end of the operating table 3, and a third servo motor 72 is installed on the outer side of the third mounting plate 71, and the output end of the third servo motor 72 is connected to a rotating shaft 73, and two fixed blocks 74 are installed on the outer side of the rotating shaft 73; a right opening groove 14 corresponding to the position of the fixed block 74 is provided at the upper end of the operating table 3, and a guide rod 75 is installed at the upper end of each fixed block 74; a material unloading concave plate 11 is connected to one side of the operating table 3, and two left opening grooves 18 corresponding to the position of the right opening groove 14 are provided at the upper end of the material unloading concave plate 11; the bottom end of the inner cavity of the material unloading concave plate 11 is an inclined slope.

[0013] In some embodiments, a groove 16 is disposed at the upper end of the operating table 3 , and a roller 17 is rotatably connected to the inner cavity of the groove 16 at equal intervals.

[0014] In some embodiments, a first mounting plate 9 is mounted on the second side of the fixing frame 8 , and an industrial camera 10 is mounted on the outer side of the first mounting plate 9 .

[0015] In some embodiments, a first electric heating plate 101 is provided at the end of the push rod 52 on one side, and the first electric heating plate 101 is connected to the push rod 52 on this side through an elastic member 102. A first part of a power-on circuit is provided on the push rod 52 on this side, and the first part of the power-on circuit is connected to the first electric heating plate 101. A second part of the power-on circuit is provided on the push rod 52 on the other side. When the push rods 52 on both sides push the safety helmet to the abutment positioning plate 65, the first electric heating plate 101 is adjacent to the second side of the safety helmet to be printed, and the push rod 52 on the other side abuts against the first electric heating plate 101, so that the first electric heating plate 101 is connected to the power-on circuit, so that the push rod 52 completes the fixed abutment of the safety helmet, and the first electric heating plate 101 heats the second side of the safety helmet to be printed while laser coding is performed.

[0016] In some embodiments, a second through slot 203 is provided on the operating table 3, two vertical rods 201 and a horizontal rod 202 connecting the two vertical rods 201 are provided below the operating table 3, a second laser engraving machine 204 is provided on the horizontal rod 202, and the second laser engraving machine 204 corresponds to the position of the second through slot 203 and faces the inner side of the helmet to be printed.

[0017] In some embodiments, a third laser engraving machine 302 is installed on the third side of the fixed frame 8 through a second inclined plate 301, and the third laser engraving machine 302 faces the third side of the safety helmet to be printed; a fourth laser engraving machine 304 is installed on the fourth side of the fixed frame 8 through a third inclined plate 303, and the fourth laser engraving machine 304 faces the fourth side of the safety helmet to be printed.

[0018] The laser positioning and coding device for helmets proposed by the present invention has the following beneficial effects: 1. During the transportation of the safety helmet, the limiting mechanism is used to limit the movement of the safety helmet, so that the safety helmet can be stably limited and moved to avoid the occurrence of position angle tilt and offset during the mobile transportation process, and avoid the subsequent laser engraving position deviation, thereby effectively avoiding affecting the processing effect of laser coding and improving the use effect.

[0019] 2. Push the safety helmet to the upper end of the roller and the operating table through the pushing mechanism. At the same time, the pushing mechanism drives the positioning mechanism to move, and the positioning plate of the positioning mechanism moves up until it passes through the first through slot to position and block the safety helmet. At this time, when the brim of the safety helmet fits with the positioning plate, the push rod also fits with the outside of the helmet shell of the safety helmet at the same time, and the two sides of the safety helmet fit with the limit plate, it is convenient to effectively position and clamp the safety helmet, and convenient for the first laser engraving machine to perform accurate positioning laser engraving and coding, which effectively improves the use effect.

[0020] 3. The guide rod of the discharging mechanism passes through the right opening slot and rotates until it fits with the inner wall of the safety helmet, and drives the safety helmet to continue to move right until it is pushed to the bottom end of the inner cavity of the unloading concave plate which is an inclined slope. At this time, the guide rod is located in the left opening slot, and the safety helmet automatically slides down through the inclined slope end, which is convenient for automatic discharging and easy to use.

[0021] 4. By combining the electric heater with the push rod, the clamping operation between the push rods with the limiting function is cleverly reused, so that the screen printing on the target area can be cured while being fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a safety helmet laser positioning and coding device proposed by the present invention; Figure 2 This is a three-dimensional structural diagram of the belt conveyor and the limiting mechanism proposed by the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the limiting mechanism proposed by the present invention; Figure 4 It is a schematic diagram of a partial three-dimensional structure proposed by the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the material pushing mechanism proposed by the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the positioning mechanism proposed by the present invention; Figure 7 This is a bottom-up three-dimensional structural schematic diagram of the discharge mechanism proposed by the present invention; Figure 8 It is a schematic diagram of a partially cutaway three-dimensional structure proposed by the present invention; Fig. 9 A schematic diagram of the helmet transportation process proposed by the present invention; Fig.10 A schematic diagram of the arrangement of the first electric heater proposed in the present invention; Fig.11 This is a schematic diagram of the contact between the push rod and the first electric heater proposed by the present invention; Fig.12 This is a schematic diagram of the inner side marking structure proposed by the present invention; Fig.13 This is a schematic diagram of the multi-side marking structure proposed by the present invention; Fig.14 Schematic diagram of the second inclined plate and the third laser engraving machine proposed by the present invention; Fig.15 A schematic diagram of the third inclined plate and the fourth laser engraving machine proposed by the present invention; Fig.16 A schematic diagram of the arrangement of the second electric heater proposed by the present invention; Fig.17 This is a schematic diagram of the rotary printing structure proposed by the present invention; Fig.18 A schematic diagram of the connection between the rotating electrical machine and the sixth mounting plate provided by the present invention; Fig.19 A schematic diagram of the fourth inclined plate and the fifth laser engraving machine proposed in the present invention; Fig. 20 This is a schematic diagram of the optimized design of the electric heating device proposed in the present invention; Fig.21 This is a schematic diagram of the electric heating device proposed by the present invention replacing the first electric heating plate; Fig. 22 This is a schematic diagram of the electric heating device proposed in the present invention replacing the second electric heating plate.

[0023] In the figure: belt conveyor 1, limiting mechanism 2, base frame 21, second mounting plate 22, first servo motor 23, drive shaft 24, circular gear 25, tooth plate 26, connecting rod 27, connecting column 28, limiting plate 29, first limiting column 211, second limiting column 210, operating table 3, base plate 4, pushing mechanism 5, supporting shaft 51, pushing rod 52, first gear 53, second servo motor 54, second gear 55, fixed shaft 56, positioning mechanism 6, screw rod 61, pulley 62, belt 63, threaded block 64, positioning plate 65, positioning column 66, discharge mechanism 7, third mounting plate 71, third servo motor 72, rotating shaft 73, fixing block 74, guide rod 75, fixing frame 8, first mounting plate 9, industrial camera 10, unloading concave plate 11, first inclined plate 12, first laser engraving machine 13, right opening groove 14, first through groove 15, groove 16, roller 17, left opening groove 18; A first electric heater 101 and an elastic member 102; Vertical rod 201, horizontal rod 202, second through slot 203, second laser engraving machine 204; A second inclined plate 301, a third laser engraving machine 302, a third inclined plate 303, and a fourth laser engraving machine 304; A fourth mounting plate 401, a fifth mounting plate 402, a support column 403, a third through slot 404, an electric telescopic rod 405, and a second electric heater 406; Rotating motor 501, sixth mounting plate 502, fourth inclined plate 503, fifth laser engraving machine 504; Electric heating device 601 , safety helmet 602 , negative electrode pin 603 , positive electrode pin 604 . DETAILED DESCRIPTION

[0024] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as open inclusion, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner, that is, although they may be carried in the embodiments or examples of the above terms due to reasons such as the order and position of appearance, it is not limited to that they can be carried in combination by one embodiment or example.

[0025] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "left", "right", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0026] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0027] It should be noted that, if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, all within the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms and directions used in this specification are only for the purpose of describing specific implementation methods and are not intended to limit the present invention.

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] Example 1 Reference Figure 1 and Figure 2 The embodiment of the present invention provides a helmet laser positioning coding device, comprising a belt conveyor 1 and an operating table 3. The belt conveyor 1 is arranged on one side of the operating table 3, for example, on the left side of the figure. A limit mechanism 2 is arranged on the upper end of the belt conveyor 1. Figure 3The limiting mechanism 2 includes a base frame 21 installed at the lower end of the belt conveyor 1, the lower end of the base frame 21 is connected to a first servo motor 23 through a second mounting plate 22, the output end of the first servo motor 23 is connected to a driving shaft 24, a circular gear 25 is installed on the outer side of the driving shaft 24, the upper and lower sides of the circular gear 25 are meshed with tooth plates 26, the upper ends of the tooth plates 26 are connected to connecting rods 27, one side of the connecting rods 27 passes through the belt conveyor 1 through a connecting column 28 and is connected to a limiting plate 29, one side of the connecting rods 27 is connected to a first limiting column 211, one end of the first limiting column 211 is movably plugged with the base frame 21, two groups of second limiting columns 210 are installed on the outer side of the limiting plate 29, one end of the second limiting column 210 movably passes through the belt conveyor 1 and extends to its outer side. In the actual implementation process, the limiting plate 29 of the limiting mechanism 2 is usually a certain distance higher than the surface of the conveyor belt, so as to effectively avoid structural parts such as the brim of the safety helmet and the multi-functional card slot on the side of the safety helmet, so that the corresponding limiting area is biased towards the elliptical area without special structural parts in the upper half of the safety helmet, so that the final guiding effect is better.

[0030] According to the size of the safety helmet, the first servo motor 23 is started and turned on, and the output of the first servo motor 23 drives the driving shaft 24 and the circular gear 25 on its outer side to rotate, and the circular gear 25 drives the two toothed plates 26 on its outer side to move and move in opposite directions, and the toothed plates 26 synchronously drive the connecting rod 27 and the connecting column 28 to move in the direction of the limit plate 29, and then the two connecting columns 28 drive the limit plates 29 to move in opposite directions until they move to fit the two sides of the safety helmet transported on the belt conveyor 1, so as to facilitate the effective limit operation of the safety helmet, and facilitate the stable limit movement and transportation of the safety helmet, and avoid the occurrence of position angle tilt and offset during the movement and transportation, resulting in deviation of the subsequent laser engraving position, thereby effectively avoiding affecting the processing effect of laser coding and improving the use effect. In order to avoid the resistance of the limit plate 29 to the helmet, when the limit plate 29 is driven to move, the limit plate 29 can also be controlled to stop when it is close to the two sides of the helmet, so that there is a slight gap between the helmet and the limit plate 29. The reserved gap is not enough to deflect the helmet. When the helmet shows signs of deflection, the limit plates 29 on both sides will form a limiting effect to keep it at a normal angle; at the same time, the reserved gap can release the abutment force of the limit plate 29 on the helmet, making the transportation of the helmet smoother. In addition to the reserved gap, the inner wall of the limit plate 29 on both sides can also be smoothed to reduce the resistance of the limit plate 29 to the helmet.

[0031] refer to Figure 1 , Figure 4 and Figure 5In some embodiments, a base plate 4 is installed on the inner side of the operating table 3, a first through slot 15 corresponding to its position is provided at the upper end of the operating table 3, a fixing frame 8 is installed at the upper end of the operating table 3, and a first laser engraving machine 13 is installed on the right side of the fixing frame 8 through a first inclined plate 12.

[0032] refer to Figure 1 , Figure 4 and Figure 5 In some embodiments, a pushing mechanism 5 is installed at the upper end of the base plate 4, and the upper end of the pushing mechanism 5 passes through the operating table 3 and extends above it. The pushing mechanism 5 includes two fixed shafts 56 rotatably installed on the upper end of the base plate 4, and a second gear 55 meshing with each other is installed on the outer side of the fixed shaft 56. A second servo motor 54 is installed on the upper end of the base plate 4. Two supporting shafts 51 are movably inserted at the upper end of the operating table 3, and push rods 52 are connected to the outer sides of the supporting shafts 51. The lower end of one of the supporting shafts 51 is connected to the output end of the second servo motor 54, and the lower end of the other supporting shaft 51 is rotatably connected to the base plate 4. A first gear 53 is installed on the outer side of the supporting shaft 51, and each first gear 53 is meshed with a second gear 55. A first mounting plate 9 is installed on one side of the fixing frame 8, and an industrial camera 10 is installed on the outer side of the first mounting plate 9. A groove 16 is provided at the upper end of the operating table 3, and a roller 17 is rotatably connected to the inner cavity of the groove 16.

[0033] refer to Fig. 9When the belt conveyor 1 is transporting the safety helmet in a limited position, the visor of the safety helmet is placed toward the right side of the belt conveyor 1 for transportation, and the belt conveyor 1 places the safety helmets at a certain distance to facilitate intermittent transportation of the safety helmets. When the safety helmet enters the visual range of the industrial camera 10, the industrial camera 10 takes a picture of it and feeds this signal back to the external controller, and the controller automatically turns on the second servo motor 54, and the output end of the second servo motor 54 drives a support shaft 51 to rotate, and the first gear 53 on the outside of the support shaft 51 drives a second gear 55 and a fixed shaft 56 in its inner cavity to rotate, and this second gear 55 drives another second gear 55 to rotate, and then the other second gear 55 is synchronously turned on. It drives another first gear 53 to rotate, and then the other first gear 53 synchronously drives the support shaft 51 in its inner cavity to rotate, and the two support shafts 51 synchronously drive the push rods 52 on their outer sides to rotate in opposite directions, so that the push rod 52 can push the safety helmet located at the upper end of the belt conveyor 1. At this time, half of the area of ​​the safety helmet and the upper end of multiple rollers 17 are pushed to continue to move when the push rod 52 rotates, and then the safety helmet is completely pushed to the upper end of multiple rollers 17, and moves under the limiting condition of the limiting plate 29, so as to effectively improve the limiting stability of its movement, and through the designed multiple rotatable rollers 17, it is convenient to improve the flexibility of the movement of the safety helmet when it is pushed, to avoid excessive resistance during movement, and affect the stability of its moving transportation.

[0034] refer to Figure 5 and Figure 6 In some embodiments, a positioning mechanism 6 is installed at the upper end of the base plate 4 and is transmission-connected to the pushing mechanism 5. The positioning mechanism 6 includes a screw rod 61 rotatably installed at the upper end of the base plate 4. A pulley 62 is installed on the outer side of the screw rod 61 and one of the fixed shafts 56. A belt 63 is jointly sleeved on the outer side of the pulley 62. A threaded block 64 is screwed on the outer side of the screw rod 61. A positioning plate 65 is connected to one side of the threaded block 64. The positioning plate 65 matches the position of the first through groove 15. A positioning column 66 is connected to the lower end of the operating table 3. The lower end of the positioning column 66 is movably plugged into the threaded block 64.

[0035] When the pushing mechanism 5 is pushing the material, one of the fixed shafts 56 drives the pulley 62 on its outer side to rotate, and this pulley 62 drives the other pulley 62 and the screw 61 in its inner cavity to rotate through the belt 63, and the threaded block 64 on the outer side of the screw 61 moves upward immediately, and then the threaded block 64 drives the positioning plate 65 to move upward until it passes through the first through groove 15 to position and block the safety helmet. At this time, when the brim of the safety helmet fits with the positioning plate 65, and the push rod 52 also fits on the outer side of the helmet shell of the safety helmet, the two sides of the safety helmet fit with or limit the limit plate 29, which is convenient for effectively positioning and clamping the safety helmet, and convenient for the first laser engraving machine 13 to perform accurate positioning laser engraving and coding, effectively improving the use effect.

[0036] refer to Figure 6 , Figure 7 and Figure 8 In some embodiments, a discharging mechanism 7 is installed at the lower end of the operating table 3, and the discharging mechanism 7 includes a third mounting plate 71 installed at the lower end of the operating table 3, and a third servo motor 72 is installed on the outer side of the third mounting plate 71. The output end of the third servo motor 72 is connected to a rotating shaft 73, and two fixing blocks 74 are installed on the outer side of the rotating shaft 73. The upper end of the operating table 3 is provided with a right opening groove 14 corresponding to the position of the fixing block 74, and the upper ends of the fixing blocks 74 are each installed with a guide rod 75. Figure 5 A material unloading concave plate 11 is connected to one side of the operating table 3. The upper end of the material unloading concave plate 11 is provided with two left opening grooves 18 corresponding to the positions of the right opening grooves 14. The bottom end of the inner cavity of the material unloading concave plate 11 is an inclined slope.

[0037] When the first laser engraving machine 13 completes engraving, the pushing mechanism 5 and the positioning mechanism 6 are reset, and then the third servo motor 72 is started. The output of the third servo motor 72 drives the rotating shaft 73 to rotate, and the rotating shaft 73 drives the guide rod 75 to rotate through the fixed block 74. At this time, the guide rod 75 is located inside the safety helmet, and then the guide rod 75 passes through the right opening groove 14 and rotates until it fits with the inner wall of the safety helmet, and drives the safety helmet to continue to move right until the safety helmet is pushed to the bottom end of the inner cavity of the inclined slope of the unloading concave plate 11. At this time, the guide rod 75 is located in the left opening groove 18, and the safety helmet automatically slides down through the inclined slope end, which is convenient for automatic discharge and easy to use, and is transported by the subsequent external conveyor.

[0038] Working principle: The present invention is connected with the belt conveyor 1, the first servo motor 23, the second servo motor 54, the third servo motor 72, the industrial camera 10, and the first laser engraving machine 13 through programming control by an external controller. When in use, according to the size of the safety helmet, the first servo motor 23 is started and turned on, and the output of the first servo motor 23 drives the driving shaft 24 and the circular gear 25 on its outer side to rotate, and the circular gear 25 drives the two toothed plates 26 on its outer side to move and move in opposite directions, and the toothed plate 26 drives the connecting rod 27, the connecting column 28 and the limit plate 29 to move until the two limit plates 29 move and fit the two sides of the safety helmet transported on the belt conveyor 1, so as to facilitate the effective limit operation of the safety helmet. It is convenient for the safety helmet to be stably limited in movement and transportation, avoiding the occurrence of position angle tilt and deviation during the movement and transportation, resulting in deviation in the subsequent laser engraving position, thereby effectively avoiding affecting the processing effect of laser coding and improving the use effect. When the safety helmet enters the visual range of the industrial camera 10, the industrial camera 10 shoots it and feeds this signal back to the external controller, and the controller automatically turns on the second servo motor 54, and the output end of the second servo motor 54 drives a support shaft 51 to rotate, and the first gear 53 on the outside of the support shaft 51 drives a second gear 55 to rotate, and the second gear 55 drives another second gear 55 to rotate, and then the other second gear 55 synchronously drives another first gear 53 rotates, and then the other first gear 53 synchronously drives the support shaft 51 in its inner cavity to rotate, and the two support shafts 51 synchronously drive the push rods 52 on their outer sides to rotate in opposite directions, so that the push rods 52 can push the safety helmet located at the upper end of the belt conveyor 1. At this time, half of the area of ​​the safety helmet and the upper ends of multiple rollers 17 are pushed to continue to move by the rotation of the push rods 52, and then the safety helmet is completely pushed to the upper ends of multiple rollers 17, and part of the area of ​​the safety helmet is located at the upper end of the operating table 3. When the pushing mechanism 5 performs the pushing work, one of the fixed shafts 56 drives the pulley 62 on its outer side to rotate, and this pulley 62 drives another pulley 62 and the screw rod 61 in its inner cavity to rotate through the belt 63, and the threaded block on the outer side of the screw rod 61 64 then moves upward, and then the threaded block 64 drives the positioning plate 65 to move upward until it passes through the first through slot 15 to position and block the safety helmet. At this time, when the visor of the safety helmet fits with the positioning plate 65, and the push rod 52 also fits with the outer side of the helmet shell at the same time, the two sides of the safety helmet fit with the limit plate 29, which is convenient for effectively positioning and clamping the safety helmet, and convenient for the first laser engraving machine 13 to accurately position the laser engraving and coding, which effectively improves the use effect. When the first laser engraving machine 13 completes the engraving, the pushing mechanism 5 and the positioning mechanism 6 are reset, and then the third servo motor 72 is started. The output of the third servo motor 72 drives the rotating shaft 73 to rotate, and the rotating shaft 73 drives the guide rod 75 to take the initiative through the fixed block 74. At this time,The guide rod 75 is located inside the helmet, and then the guide rod 75 passes through the right opening slot 14 and rotates until it fits with the inner wall of the helmet, and drives the helmet to continue to move right until the helmet is pushed to the bottom end of the inner cavity of the unloading concave plate 11 which is an inclined slope. At this time, the guide rod 75 is located in the left opening slot 18, and the helmet automatically slides down through the inclined slope end, which is convenient for automatic discharge and easy to use.

[0039] In summary, the embodiment of the present invention performs a limited movement operation on the safety helmet during transportation through a limiting mechanism, so that the safety helmet can be stably limited and moved for transportation, and the phenomenon of position angle tilt and offset during the moving and transportation process is avoided, and the subsequent laser engraving position is avoided to be biased, thereby effectively avoiding affecting the processing effect of laser coding and improving the use effect. The embodiment of the present invention pushes the safety helmet to the upper end of the roller and the operating table through the pushing mechanism. At the same time, the pushing mechanism drives the positioning mechanism to move, and the positioning plate of the positioning mechanism moves up until it passes through the first through groove to position and block the safety helmet. At this time, when the brim of the safety helmet fits with the positioning plate, and the push rod also fits with the outside of the helmet shell of the safety helmet at the same time, and the two sides of the safety helmet fit with the limiting plate, it is convenient to effectively position and clamp the safety helmet, and facilitate the first laser engraving machine to accurately position the laser engraving and coding, effectively improving the use effect. In the embodiment of the present invention, the material guide rod of the material discharging mechanism passes through the right opening groove and rotates until it fits with the inner wall of the safety helmet, and drives the safety helmet to continue to move right until the safety helmet is pushed to the bottom end of the inner cavity of the unloading concave plate which is an inclined slope. At this time, the material guide rod is located in the left opening groove, and the safety helmet automatically slides down through the inclined slope end, which is convenient for automatic material discharging and easy to use.

[0040] Example 2 On the basis of the above-mentioned embodiment 1, embodiment 2 of the present invention optimizes the design to address the deficiency that only one side of the helmet can be marked in embodiment 1. It should be noted that in addition to laser engraving and marking, the helmet can also be marked by screen printing. In the process of marking by screen printing, in order to cure the paint faster, one or more workers are usually required to wear a flame spray gun to perform manual curing operations, which not only tests the consistency of the curing effect, but also causes a decrease in the production and processing efficiency of the corresponding assembly line. This embodiment is based on this demand and provides an automated local heating design for the helmet, so that the curing operation in the screen printing process can be automated and carried out simultaneously with the laser engraving and marking, saving the workers the time of manually heating the helmet.

[0041] refer to Fig.10 and Fig.11As shown, in some embodiments, a first electric heating plate 101 is provided at the end of the push rod 52 on one side, and the first electric heating plate 101 is connected to the push rod 52 on this side through an elastic member 102. A first part of a power-on circuit is provided on the push rod 52 on this side, and the first part of the power-on circuit is connected to the first electric heating plate 101. A second part of a power-on circuit is provided on the push rod 52 on the other side, and the first part and the second part of the power-on circuit are connected through an external circuit, leaving only a gap for the electric heating plate to connect the gap. When the push rods 52 on both sides push the safety helmet to the abutment positioning plate 65, the first electric heating plate 101 is adjacent to the second side of the safety helmet to be printed, and the circuit pins on the push rod 52 on the other side abut against the circuit pins of the first electric heating plate 101, so that the first electric heating plate 101 is connected to the power-on circuit. After the first electric heating plate 101 is energized, it starts to heat up, so that the push rod 52 completes the fixed abutment of the safety helmet. While laser coding is being performed, the first electric heating plate 101 heats the second side of the safety helmet to be printed. By setting that the push rod 52 on the other side abuts against the first electric heater 101 to connect the energized circuit, the push rod 52 can be heated only when it moves to abut against the first electric heater 101, and the heating is automatically turned off when the push rod 52 returns to its original position, so that the circuit can be automatically switched on and off, and power can be saved. In a specific implementation, in order to increase the efficiency of laser coding completion and screen printing heating completion, so as to reduce the waiting time of other helmets to be laser coded on the conveyor belt, in a specific implementation, the motor speed of the push mechanism 5 is set to a two-stage type, that is, before the two push rods 52 complete the conduction of the two poles of the first electric heater 101, it has a first speed v1, and after the two poles of the first electric heater 101 are conducted, it has a second speed v2, wherein the first speed v1 is greater than the second speed v2, and the first speed v1 is to reduce the waiting time of other helmets to be laser coded on the conveyor belt.

[0042] by Fig. 9 As a standard, in the embodiment of the present invention, the second side of the safety helmet is also the left side of the safety helmet, the first side of the safety helmet is the right side, the third side of the safety helmet is the front side, and the fourth side of the safety helmet is the back side. The conveyor belt transmits from left to right, and the orientations of the first side, second side, third side, and fourth side of other components are also the same as those of the safety helmet.

[0043] The power-on circuit is not shown in the figure. A simple power-on circuit is used to power on the push rod 52 on the other side after it contacts the first electric heater 101. This circuit is common knowledge and will not be described in detail here.

[0044] The elastic member 102 of this embodiment can be an elastic member such as an elastic rod or a spring, which is arranged in a row from top to bottom to connect the first electric heater 101 and the push rod 52. The elastic member 102 is arranged to avoid the disadvantage that the first electric heater 101 and the push rod 52 are directly connected by rigidity and are easy to be damaged.

[0045] Through the above arrangement, after the push rods 52 on both sides push the helmet to the abutment positioning plate 65, while the first laser engraving machine 13 performs laser printing on the right side of the helmet, the first electric heater 101 can also heat the left side of the helmet. The electric heater combined with the push rods cleverly reuses the clamping operation between the push rods with the limiting function, so that the screen printing curing operation on the target area can be provided while the support is fixed. Based on the laser printing on the right side of the helmet in Example 1, this embodiment 2 takes into account the screen printing curing process on the left side of the helmet, and has the advantage of multi-side marking compared to the single-side marking in Example 1.

[0046] Example 3 Based on the above-mentioned embodiment 1, the embodiment 3 of the present invention is optimized and designed to solve the problem that only one side of the helmet can be marked in embodiment 1. The embodiment 3 can be used in combination with the embodiment 1 and the embodiment 2.

[0047] refer to Fig.12 As shown, in some embodiments, a second through slot 203 is opened on the operating table 3, two vertical rods 201 and a horizontal rod 202 connecting the two vertical rods 201 are arranged below the operating table 3, and a second laser engraving machine 204 is arranged on the horizontal rod 202. The second laser engraving machine 204 corresponds to the position of the second through slot 203 and faces the inner side of the helmet to be printed.

[0048] In this embodiment, considering the marking requirements for the helmet, it is not necessarily all on the outside, and it is also possible to mark parameters and the like on the inside. In this case, the structure of marking on the outside of Embodiment 1 and Embodiment 2 cannot meet the requirements. In this embodiment 3, based on the previous embodiments, the second laser engraving machine 204 is set below the operating table 3, and the second through slot 203 is set according to the position of the positioning plate 65 and the first through slot 15. When the helmet is transported to the positioning plate 65, it will be just above the second through slot 203. In this way, the second laser engraving machine 204 can print on the inside of the helmet through the second through slot 203 to achieve the marking requirements on the inside of the helmet.

[0049] Example 4 Based on the above-mentioned embodiment 1, the embodiment 4 of the present invention is optimized to solve the problem that only one side of the helmet can be marked in embodiment 1. The embodiment 4 can be used in combination with the embodiment 1, embodiment 2 and embodiment 3.

[0050] refer to Fig.13 , Fig.14 and Fig.15As shown, in some embodiments, a third laser engraving machine 302 is installed on the third side of the fixed frame 8 through a second inclined plate 301, and the third laser engraving machine 302 faces the third side of the safety helmet to be printed; a fourth laser engraving machine 304 is installed on the fourth side of the fixed frame 8 through a third inclined plate 303, and the fourth laser engraving machine 304 faces the fourth side of the safety helmet to be printed.

[0051] Under the above settings, except for the left side of the helmet which is heated and cured, the other three sides, the front side, the back side and the right side, can be marked by the laser engraving machine, thus realizing the function of multi-side marking.

[0052] Example 5 Based on the above-mentioned embodiment 1, the embodiment 5 of the present invention is optimized to solve the problem that only one side of the helmet can be marked in embodiment 1. The embodiment 5 can replace the embodiment 2 and be used in combination with the embodiment 4, embodiment 1 and embodiment 3.

[0053] refer to Fig.16 As shown, in some embodiments, a fourth mounting plate 401 is fixed to the second side of the fixing frame 8, support columns 403 are fixed to the four corners of the fourth mounting plate 401, and a fifth mounting plate 402 is fixed above the support column 403; an electric telescopic rod 405 is fixed to the bottom of the fifth mounting plate 402, and the telescopic end of the electric telescopic rod 405 is connected to the second electric heater 406, and a third through slot 404 is provided on the fourth mounting plate 401, and the position of the third through slot 404 corresponds to the position of the second electric heater 406, and corresponds to the position of the second side of the helmet to be printed. The shape and size of the third through slot 404 can be adjusted according to the current size of the second electric heater 406, and is not limited here.

[0054] In specific use, after the push rods 52 on both sides push the helmet to abut the positioning plate 65, while the first laser engraving machine 13 performs laser printing on the right side of the helmet, the electric telescopic rod 405 can drive the second electric heater 406 to extend downward from the third through slot 404 until it is in contact with or close to the left side of the helmet to be cured, and is heated, so that the curing operation of the silk screen on the target area can be provided at the same time as the laser marking. The second electric heater 406 has a complete power circuit and is turned on and off by an external switch.

[0055] Based on the laser printing on the right side of the helmet in Example 1, Example 5 takes into account the curing process on the left side of the helmet. Compared with the single-side marking in Example 1, Example 5 has the advantage of multi-side marking.

[0056] Example 6 Based on the above-mentioned embodiment 1, the embodiment 6 of the present invention is optimized and designed to solve the problem that only one side of the helmet can be marked in embodiment 1. The embodiment 6 can replace the embodiment 4 and be used in combination with other embodiments.

[0057] refer to Fig.17 , Fig.18 and Fig.19 As shown, in some embodiments, a rotating motor 501 is provided below the fixing frame 8, and the rotating end of the rotating motor 501 is connected to a sixth mounting plate 502, and a fourth inclined plate 503 is provided on one side of the sixth mounting plate 502, and a fifth laser engraving machine 504 is provided inside the fourth inclined plate 503. When the fourth inclined plate 503 rotates to any side with the sixth mounting plate 502, the fifth laser engraving machine 504 faces the side corresponding to the helmet to be printed. When this solution is adopted, the first inclined plate 12 and the first laser engraving machine 13 in Example 1 can be removed, and the second inclined plate 301, the third laser engraving machine 302, the third inclined plate 303 and the fourth laser engraving machine 304 in Example 4 can also be removed.

[0058] For example, the rotating motor 501 drives the sixth mounting plate 502 to rotate to a position as follows: Fig.17 The fourth inclined plate 503 is located at the front side of the helmet, and the corresponding fifth laser engraving machine 504 faces the front side of the helmet to be printed, so as to print the front side of the helmet. When the rotating motor 501 drives the sixth mounting plate 502 to rotate, and then drives the fourth inclined plate 503 to rotate to the right side of the helmet, the corresponding fifth laser engraving machine 504 faces the right side of the helmet to be printed, so as to print the right side of the helmet. When the rotating motor 501 drives the sixth mounting plate 502 to rotate, and then drives the fourth inclined plate 503 to rotate to the back side of the helmet, the corresponding fifth laser engraving machine 504 faces the back side of the helmet to be printed, so as to print the back side of the helmet. When the rotating motor 501 drives the sixth mounting plate 502 to rotate, and then drives the fourth inclined plate 503 to rotate to the left side of the helmet, the corresponding fifth laser engraving machine 504 faces the left side of the helmet to be printed, so as to print the left side of the helmet.

[0059] It should be noted that the heights of the sixth mounting plate 502 and the fourth inclined plate 503 are higher than the push rod 52 and the safety helmet, and the sizes of the sixth mounting plate 502 and the fourth inclined plate 503 are much smaller than the size of the fixing frame to avoid interference.

[0060] By setting the rotating printing structure, the printing requirements in any direction can be met when printing is needed, thus achieving the advantage of multi-side marking.

[0061] Example 7 This embodiment provides an electric heating device 601, which is used to replace the first electric heating plate 101 in Embodiment 2 or the second electric heating plate 406 in Embodiment 5 to achieve better use effect.

[0062] refer to Fig. 20 As shown, the side of the electric heating device 601 facing the safety helmet 602 is configured as a curved surface that matches the shape of the safety helmet 602 so as to better abut against and heat the safety helmet 602 .

[0063] In some embodiments, the electric heating device 601 includes an outer shell and an internal electric heating plate. A thermal conductive material can be arranged between the outer shell facing the safety helmet 602 and the electric heating plate. A layer of anti-collision material such as rubber or foam can be arranged on the edge of the outer shell of the electric heating device 601.

[0064] refer to Fig.21 As shown, in some embodiments, for example, when replacing the first electric heating plate 101, the side of the shell of the electric heating device 601 away from the safety helmet 602 is connected to the push rod 52 on one side through the elastic member 102, and the push rod 52 on this side is provided with the first part of the power-on circuit, and the first part of the power-on circuit is connected to the electric heating plate in the electric heating device 601. Specifically, the negative pin 603 of the electric heating plate can be led out on this side of the electric heating device 601 to connect with the first part of the power-on circuit. The push rod 52 on the other side is provided with the second part of the power-on circuit, and the positive pin 604 of the electric heating plate can be led out on this side of the electric heating device 601, so that when the push rod 52 on the other side abuts against the electric heating device 601, the positive pin 604 of the electric heating plate is connected to the second part of the power-on circuit. The first part and the other end of the second part of the energized circuit are connected through an external circuit. When the circuit is not connected, only the positive pin 604 is left unconnected. When the push rods 52 on both sides push the helmet to abut the positioning plate 65, the side of the electric heating device 601 facing the helmet 602 is attached to the helmet shell, and the circuit pin on the push rod 52 on the other side abuts the positive pin 604 of the electric heating plate reserved on the shell of the electric heating device 601, so that the electric heating plate is connected to the energized circuit. The above positive and negative electrodes are only examples and can also be interchanged.

[0065] In some embodiments, for example, when replacing the second electric heating plate 406, the top of the electric heating device 601 is connected to the telescopic end of the electric telescopic rod 405, and the electric heating device 601 can also be provided with a negative pin 603 and a positive pin 604. The negative pin 603 and the positive pin 604 can be connected through an external circuit and controlled by an external switch.

[0066] If additional explanation is needed, the size of the corresponding first electric heater 101 or the second electric heater 406 or the electric heating device 601 is larger than the screen-printed object. Therefore, if laser coding is required near the screen-printed area at the same time, the technical solution of the present invention cannot effectively solve the needs in this scenario. However, in terms of the customer needs of the applicant's company for many years, this situation has not occurred at least so far, because laser coding is more for printing parameter values, and even if a logo is to be printed, it is an alternative relationship with screen printing. Therefore, there is no situation where both screen printing and laser coding are required on the same side of the helmet (however, there are still cases where the outer surface of the same side of the helmet is screen-printed and the inner surface needs to be laser coded. This is the preferred implementation scheme of the present invention). Fig.12 and Fig.10 or Fig.16 or Fig. 20 The combined solution can effectively solve the needs of this scenario).

[0067] In combination with the embodiment of the present invention, in order to achieve better consistency in time between the completion of laser coding and the completion of screen printing heating, the corresponding laser coding efficiency is taken as a reference. Generally, the time required for laser coding of a helmet is about 1-2s, and the corresponding screen printing heating curing, if it is considered that the two sides of the push rod 52 form a closed state to start heating the first heating plate 101, until the heating temperature reaches the curing temperature and lasts for a preset time (here the first helmet scenario is not considered, but the intermediate process of the i-th helmet has been considered, at this time, the corresponding first heating plate 101 There will be residual heat after each operation, which will be more efficient than the first safety helmet to complete the silk screen heating) usually in 5-6s; therefore, in order to further shorten the gap between the two, there is also an optional solution, that is, the two poles of the corresponding first heating plate 101 are made on one side of the push rod 52, so that the first heating plate 101 is powered on in advance based on the shooting of the industrial camera 10 to complete the preheating; through theoretical model deduction, such operation can solve the 2-3s time, and shorten the time difference between the completion of laser coding and the completion of silk screen heating to 1-2s, so as to optimize the electric energy and industrial efficiency. Therefore, in addition to the adjustment of the electrodes and the triggering of the industrial camera 10 on the timing of power-on, all other mechanical structures can be applied to the above Fig.10 and Fig.11 ,as well as Fig.16 The scheme will not be described in detail here.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser positioning and coding device for a helmet, characterized in that: The invention comprises a belt conveyor (1) and an operating table (3), wherein the belt conveyor (1) is arranged on one side of the operating table (3), and limit mechanisms (2) are arranged on both sides of the belt conveyor (1); a bottom plate (4) is installed in the operating table (3), and a pushing mechanism (5) is installed on the bottom plate (4); the upper end of the pushing mechanism (5) passes through the operating table (3) and extends above it; a positioning mechanism (6) is also installed on the bottom plate (4) and is transmission-connected to the pushing mechanism (5); a first through slot (15) corresponding to the position of the positioning mechanism (6) is arranged on the operating table (3); a fixing frame (8) is also installed on the operating table (3); a first laser engraving machine (13) is installed on the first side of the fixing frame (8) through a first inclined plate (12), and the first laser engraving machine (13) faces the first side of the helmet to be printed; The limiting mechanism (2) comprises a base frame (21) mounted at the lower end of the belt conveyor (1); the lower end of the base frame (21) is connected to a first servo motor (23) via a second mounting plate (22); the output end of the first servo motor (23) is connected to a driving shaft (24); a circular gear (25) is mounted on the outer side of the driving shaft (24); the upper and lower sides of the circular gear (25) are meshed with tooth plates (26); the upper ends of the tooth plates (26) are connected to connecting rods (27); one side of the connecting rods (27) passes through the belt conveyor (1) via a connecting column (28) and is connected to a limiting plate (29); The pushing mechanism (5) comprises two fixed shafts (56) rotatably mounted on the upper end of the base plate (4), second gears (55) meshing with each other are mounted on the outer side of the fixed shafts (56), a second servo motor (54) is mounted on the upper end of the base plate (4), two supporting shafts (51) are movably plugged into the upper end of the operating table (3), and push rods (52) are connected to the outer sides of the supporting shafts (51), the lower end of one of the supporting shafts (51) is connected to the output end of the second servo motor (54), and the lower end of the other supporting shaft (51) is rotatably connected to the base plate (4), and first gears (53) are mounted on the outer sides of the supporting shafts (51), and each of the first gears (53) meshes with one of the second gears (55); The positioning mechanism (6) comprises a screw rod (61) rotatably mounted on the upper end of the base plate (4); a pulley (62) is mounted on the outer side of the screw rod (61) and one of the fixed shafts (56); a belt (63) is sleeved on the outer side of the pulley (62); a threaded block (64) is threadedly connected to the outer side of the screw rod (61); a positioning plate (65) is connected to one side of the threaded block (64); the positioning plate (65) matches the position of the first through groove (15).

2. A helmet laser positioning and coding device according to claim 1, characterized in that: The lower end of the operating table (3) is connected to a positioning column (66), and the lower end of the positioning column (66) is movably plugged into the threaded block (64).

3. The laser positioning and coding device for a helmet according to claim 1, characterized in that: One side of the connecting rod (27) is connected to a first limiting column (211), and one end of the first limiting column (211) is movably plugged into the bottom frame (21).

4. The laser positioning and coding device for a helmet according to claim 1, characterized in that: Two groups of second limiting columns (210) are installed on the outer sides of the limiting plates (29), and one end of the second limiting columns (210) movably penetrates the belt conveyor (1) and extends to the outer side thereof.

5. The laser positioning and coding device for a helmet according to claim 1, characterized in that: A material discharging mechanism (7) is installed below the operating table (3), the material discharging mechanism (7) comprising a third mounting plate (71) mounted at the lower end of the operating table (3), a third servo motor (72) being mounted on the outer side of the third mounting plate (71), an output end of the third servo motor (72) being connected to a rotating shaft (73), two fixed blocks (74) being mounted on the outer side of the rotating shaft (73), a right opening groove (14) corresponding to the position of the fixed block (74) being arranged at the upper end of the operating table (3), and a material guide rod (75) being mounted at the upper end of each of the fixed blocks (74); a material discharging concave plate (11) being connected to one side of the operating table (3), two left opening grooves (18) corresponding to the position of the right opening groove (14) being arranged at the upper end of the material discharging concave plate (11); and the bottom end of the inner cavity of the material discharging concave plate (11) is an inclined slope.

6. The laser positioning and coding device for a helmet according to claim 1, characterized in that: A groove (16) is provided at the upper end of the operating table (3), and rollers (17) are rotatably connected to the inner cavity of the groove (16) at equal intervals.

7. The laser positioning and coding device for a helmet according to claim 1, characterized in that: A first mounting plate (9) is mounted on the second side of the fixing frame (8), and an industrial camera (10) is mounted on the outer side of the first mounting plate (9).

8. The laser positioning and coding device for a helmet according to claim 1, characterized in that: A first electric heating plate (101) is arranged at the end of the push rod (52) on one side, the first electric heating plate (101) is connected to the push rod (52) on this side via an elastic member (102), a first part of an energized circuit is arranged on the push rod (52) on this side, the first part of the energized circuit is connected to the first electric heating plate (101), and a second part of the energized circuit is arranged on the push rod (52) on the other side. When the push rods (52) on both sides push the helmet to the abutment positioning plate (65), the first electric heating plate (101) is adjacent to the second side of the helmet to be printed, and the push rod (52) on the other side abuts against the first electric heating plate (101), so that the first electric heating plate (101) is connected to the energized circuit, so that the push rod (52) completes the fixed abutment of the helmet, and while laser coding is being performed, the first electric heating plate (101) heats the second side of the helmet to be printed.

9. The laser positioning and coding device for a helmet according to claim 1, characterized in that: The operating table (3) is provided with a second through slot (203), two vertical bars (201) and a horizontal bar (202) connecting the two vertical bars (201) are arranged below the operating table (3), a second laser engraving machine (204) is arranged on the horizontal bar (202), the second laser engraving machine (204) corresponds to the position of the second through slot (203) and faces the inside of the helmet to be printed.

10. The laser positioning and coding device for a helmet according to claim 1, characterized in that: A third laser engraving machine (302) is installed on the third side of the fixing frame (8) via a second inclined plate (301), and the third laser engraving machine (302) faces the third side of the helmet to be printed; and a fourth laser engraving machine (304) is installed on the fourth side of the fixing frame (8) via a third inclined plate (303), and the fourth laser engraving machine (304) faces the fourth side of the helmet to be printed.

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