A laser inspection device for wood processing flatness

Abstract

This invention discloses a laser inspection device for the flatness of wood processing, comprising a frame, a rangefinder, a spindle, a motor, a main gear, and a clamp. The rangefinder is mounted on the top of the left side wall of the frame. The spindle is mounted on the middle of the right side wall of the frame via bearings. The motor is mounted on the middle of the left side wall of the frame, driving the spindle to rotate. The main gear is mounted on the outer wall of the spindle. The clamp is mounted on the right end of the spindle, allowing the workpiece to rotate after being centered and clamped by the clamp. This device effectively kills insect eggs, bacteria, and other harmful substances within the workpiece, preventing corrosion of the wood by pests and bacteria, extending the service life of wood products, and ensuring the adhesion of the wood surface, preventing damage to the primer adhesion due to wood corrosion. It achieves full-dimensional flatness inspection of the surface of irregularly shaped cylindrical workpieces, effectively avoiding inspection errors caused by human factors and ensuring the consistency of processing quality for cylindrical wood products.

Description

Technical Field

[0001] This invention relates to the field of wood processing technology, specifically to a laser detection device for wood processing flatness. Background Technology

[0002] Timber processing is the production process of turning natural logs into various solid wood profiles through specialized machinery. It mainly includes two processes: log cutting into boards and log turning into columns. It is the basic link in the production of household wood products and engineering materials. It is also the core raw material preparation method for rod-shaped wood products such as rolling pins, solid wood stool legs, and engineering flower poles. Its processing technology and finished product quality directly affect the performance and service life of wood products, and it has important application value in both civil production and engineering construction.

[0003] Currently, the industry's laser flatness inspection equipment is mainly designed for the processing and inspection of panel wood products. This type of equipment uses a conveyor to continuously move the panels and a laser rangefinder to measure distances at different locations on the panel surface, thereby achieving automated and standardized flatness inspection and effectively meeting the processing quality inspection needs of panel wood products. However, for column-shaped timber obtained by turning logs into columns, due to their irregular columnar structure, which differs significantly from the planar structure of panels, existing laser inspection equipment cannot adapt to their structural characteristics for flatness inspection. This means that the flatness inspection of such column-shaped timber can only rely on visual judgment by workers, which is not only inefficient but also highly susceptible to factors such as human experience and operating conditions, making it difficult to guarantee the consistency of processing quality for column-shaped timber products. This has become a significant factor restricting the standardization of column-shaped timber processing.

[0004] Meanwhile, column-shaped wooden products are mostly designed for practical use, and their surfaces usually need to be coated with a primer to form a protective layer to improve corrosion resistance and extend service life. Currently, primer coating is mostly done manually by workers holding brushes. This method is not only inefficient and difficult to match the needs of large-scale processing, but it is also prone to problems such as missed areas and uneven coating thickness, which affect the protective effect of the primer and the consistency of the appearance of the wooden products.

[0005] More importantly, in the existing column wood processing flow, the bar workpieces after turning and shaping lack a dedicated automated sterilization process before the primer is applied. The insect eggs, bacteria and other harmful substances remaining on the surface and inside the workpiece can easily cause continuous corrosion to the wood itself. This corrosion not only damages the smoothness and adhesion of the wood surface, reduces the adhesion between the primer and the wood surface, and causes the coating to fall off, but also directly erodes the internal structure of the wood, significantly shortening the overall service life of the wood products. Summary of the Invention

[0006] The purpose of this invention is to provide a laser inspection device for wood processing flatness, so as to at least solve the problems of existing technologies such as the inability to automatically sterilize before coating, difficulty in inspecting the flatness of bar wood, and the easy omissions in the seventh coating.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a laser inspection device for wood processing flatness, comprising a frame, a rangefinder, a spindle, a motor, a main gear, and a clamp. The rangefinder is installed at the top of the left side wall of the frame. The spindle is installed in the middle of the right side wall of the frame via bearings. The motor is installed in the middle of the left side wall of the frame, driving the spindle to rotate. The main gear is installed on the outer wall of the spindle. The clamp is installed at the right end of the spindle, allowing the workpiece to rotate after the clamp centers and holds it. A sterilization mechanism is installed at the bottom of the left side wall of the frame. When the main gear drives the sterilization mechanism to run, the workpiece placed in the sterilization mechanism is sterilized. A rangefinder is installed laterally at the top of the right side wall of the frame. When the main gear drives the sterilization mechanism to run, the rangefinder measures the surface flatness of the workpiece. A pin is installed laterally at the top of the right side wall of the frame. The sterilization mechanism includes a sterilization box installed at the bottom of the left side wall of the frame. A heating lamp is installed on the top of the inner wall of the sterilization box. The heating lamp generates heat when it is powered on. A material trough is slidably connected to the bottom of the inner wall of the sterilization box. The material trough is used to store workpieces. The heat generated by the heating lamp is used to heat the workpieces to achieve high-temperature sterilization. A traction rod is installed horizontally on the right side wall of the material trough. The right end of the traction rod extends out of the right side wall of the sterilization box and is equipped with an insertion rod. A toggle assembly is installed in the middle of the right side wall of the sterilization box through a bearing. Heating conditions are applied to components to kill insect eggs, bacteria, and other substances present inside the components, preventing long-term corrosion.

[0008] Preferably, the actuation assembly includes a first driven shaft mounted on the right side wall of the sterilization chamber via a bearing. The right end of the first driven shaft extends into the frame and is fitted with a first driven gear. The first driven gear meshes with the main gear to provide rotational power to the first driven shaft. A roller is mounted on the left end of the outer wall of the first driven shaft. A guide groove is provided on the outer wall of the roller, and the insertion rod is inserted into the inner cavity of the guide groove. It provides power for the left and right movement of the material trough, so that the workpiece is rolled and heated evenly, avoiding local overheating and carbonization of the workpiece.

[0009] Preferably, the guide grooves are distributed in a wavy pattern on the outer wall of the drum.

[0010] Preferably, the ranging mechanism includes a slide rod horizontally mounted on the top of the right side wall of the frame. A lead screw is mounted on the top of the right side wall of the frame via a bearing. The lead screw is located at the bottom of the slide rod. A second driven gear that meshes with the main gear is mounted on the left end of the lead screw to provide power for the rotation of the lead screw. A moving component that engages with the lead screw is sleeved on the outer wall of the slide rod. The moving component is driven to move to the left or right by rotating the lead screw clockwise or counterclockwise. A limiting component is sleeved on one end of the outer wall of the slide rod. The other end of the limiting component is sleeved with the lead screw. The limiting component restricts the rightward movement distance of the moving component. The sliding rod and lead screw work together to move the moving components left and right, providing driving force for flatness inspection and workpiece coating.

[0011] Preferably, the moving component includes a moving frame screwed to the outer wall of the lead screw, and the moving frame is also sleeved with a slide rod. The lead screw drives the moving frame to move left and right. A bracket is installed on the lower surface of the moving frame. Several distance sensors electrically connected to a rangefinder are installed on the outer wall of the bracket from left to right. The distance sensors emit lasers, which are reflected back to the photosensitive chip by the workpiece. The rangefinder measures the distance using the laser triangulation method. A paint tank is installed on the upper surface of the moving frame. The paint tank stores the paint to be applied to the workpiece. A reversing unit is installed on the front of the moving frame. The bottom of the paint tank is connected to the top of the reversing unit through a pipe. A lifter is installed at the bottom of the right side wall of the moving frame. A brush is installed at the output end of the lifter. The brush is connected to the bottom of the reversing unit through a pipe. The lifter drives the brush to descend and supplies paint to the brush under the control of the reversing unit, allowing the brush to evenly apply the paint to the surface of the workpiece. The reversing unit can switch between two working modes: flatness detection and workpiece coating, thus integrating flatness detection and workpiece coating.

[0012] Preferably, the ranging sensor, brush, and clamp are in the same plane.

[0013] Preferably, the reversing unit includes a valve body installed on the front of the moving frame. The top of the valve body is connected to the bottom of the paint tank via a pipe. A connecting rod that runs through the inside and outside is installed at the center of the front of the valve body via a bearing. A rocker arm and a valve core are respectively installed at the front and rear ends of the connecting rod. When the valve core rotates, the valve body can be opened and closed. A baffle plate that constrains the swing angle of the rocker arm is installed on the front of the valve body. Two symmetrical slots are opened on the inner wall of the baffle plate. Two symmetrical first proximity switches are installed on the outer wall of the baffle plate. The first proximity switch on the left is electrically connected to the motor. The first proximity switch cooperates with the motor controller to control its closure. The first proximity switch on the right cooperates with the controller. The motor rotates in the opposite direction, causing the lead screw to rotate counterclockwise. A spring and a ball are inserted into the inner cavity of the rocker arm from the inside to the outside. Under the action of the spring force, the ball is pushed into the slot, which not only positions the rocker arm, but also contacts the first proximity switch, triggering the first proximity switch. The movement distance of the mobile frame is limited to transport paint and provide conditions for coating the workpiece.

[0014] Preferably, the swing arm and the ejector pin are at the same height.

[0015] Preferably, the groove depth is less than the ball radius.

[0016] The laser detection device for wood processing flatness proposed in this invention has the following advantages: 1. This invention drives the drum to rotate through the meshing transmission of the main gear and the first driven gear. The wavy guide groove and the insert rod are used to drive the material trough to swing left and right, so that the workpiece in the material trough rolls naturally with the swing, continuously changing the heated position of the workpiece. The heating lamp is used as a heat source to achieve uniform heating of the workpiece, effectively killing harmful substances such as insect eggs and bacteria in the workpiece. This not only avoids the corrosion of the wood by insects and bacteria, extending the service life of wood products, but also ensures the adhesion of the wood surface, preventing the adhesion of the primer from being damaged by the wood corrosion, and laying a good foundation for the subsequent coating process.

[0017] 2. This invention, through the linkage transmission of the main gear, drives the workpiece held by the fixture to rotate, continuously changing the flatness measurement position. On the other hand, it drives the second driven gear to rotate the lead screw clockwise. The screw's thread rotation force drives the moving frame to move smoothly to the right along the slide rod. The workpiece surface is laser-metered by a distance sensor. By combining the workpiece rotation and the moving frame movement, the flatness of the irregular cylindrical workpiece surface can be detected in all dimensions. This replaces the traditional manual visual inspection method, effectively avoiding detection errors caused by human factors and ensuring the consistency of the processing quality of cylindrical wood products.

[0018] 3. This invention triggers the reversing unit's action through the mechanical contact between the stop bar and the swing arm. The swing arm rotates counterclockwise, causing the valve core to rotate synchronously and open the valve body, thus conveying paint from the paint tank to the brush. Simultaneously, under the action of the spring force, the ball bearing engages with the right-side slot, triggering the first proximity switch. This controls the motor to reverse, causing the lead screw to move the moving frame to the left, providing power for coating. The electric telescopic rod also drives the lifting plate to descend. The second proximity switch precisely controls the contact position between the brush and the workpiece. The rotational motion of the workpiece achieves uniform coating of the primer. This design integrates the detection and coating processes into the same equipment, significantly reducing processing steps and improving overall processing efficiency. It also replaces manual coating, effectively avoiding coating omissions and ensuring the integrity and uniformity of the protective layer on the workpiece surface.

[0019] 4. This invention utilizes the sliding engagement of the moving plate of the limiting component along the slide rod and lead screw, combined with the locking and fixing of the positioning bolts. The position of the stop bar can be flexibly adjusted according to the length of the column wood of different specifications, thereby accurately controlling the detection and coating stroke of the moving frame. This allows the equipment to be adapted to the processing of column workpieces of various lengths, eliminating the need to configure separate processing equipment for different specifications of workpieces. This effectively improves the applicability of the equipment and reduces the processing equipment investment cost for enterprises. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 3 This is a perspective view of the sterilization mechanism of the present invention; Figure 4 For the present invention Figure 3 Enlarged view at point B in the middle; Figure 5 This is a perspective view of the toggle component of the present invention; Figure 6 This is a perspective view of the ranging mechanism of the present invention; Figure 7 This is a perspective view of the moving component of the present invention; Figure 8 This is a partial cross-sectional view of the commutation unit of the present invention; Figure 9 For the present invention Figure 8 Enlarged view at point C; Figure 10 This is a perspective view of the lifting device of the present invention; Figure 11 This is a three-dimensional view of the brush of the present invention; Figure 12 This is a perspective view of the limiting component of the present invention.

[0021] In the diagram: 1. Frame; 2. Rangefinder; 3. Spindle; 4. Motor; 5. Main gear; 6. Clamp; 7. Sterilization mechanism; 8. Rangefinder mechanism; 9. Pin; 71. Sterilization chamber; 72. Heat lamp; 73. Material trough; 74. Traction rod; 75. Insert rod; 76. Actuating assembly; 761. First driven shaft; 762. First driven gear; 763. Roller; 764. Guide groove; 81. Slide rod; 82. Lead screw; 83. Second driven gear; 84. Moving assembly; 85. Limiting assembly; 841. Moving frame; 842. Support; 843. Rangefinder sensor ; 844, Paint box; 845, Reversing unit; 846, Lifter; 847, Brush; 851, Moving plate; 852, Positioning bolt; 853, Stop bar; 8451, Valve body; 8452, Connecting rod; 8453, Swing rod; 8454, Valve core; 8455, Baffle plate; 8456, Slot; 8457, First proximity switch; 8458, Spring; 8459, Ball bearing; 8461, Electric telescopic rod; 8462, Lifting plate; 8463, Second proximity switch; 8471, Dispensing box; 8472, Discharge port; 8473, Brush bristles. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-12 This invention provides a technical solution: a laser detection device for wood processing flatness, comprising a frame 1, a rangefinder 2, a spindle 3, a motor 4, a main gear 5, and a clamp 6. The rangefinder 2 is installed at the top of the left side wall of the frame 1. The spindle 3 is installed in the middle of the right side wall of the frame 1 via bearings. The motor 4 is installed in the middle of the left side wall of the frame 1, driving the spindle 3 to rotate. The main gear 5 is installed on the outer wall of the spindle 3. The clamp 6 is installed at the right end of the spindle 3. The clamp 6 is a three-jaw chuck, which achieves centering and clamping of rod-shaped workpieces. The spindle 3 drives the workpiece to rotate. A sterilization mechanism 7 is installed at the bottom of the left side wall of the frame 1. When the main gear 5 drives the sterilization mechanism 7 to run, the workpiece placed in the sterilization mechanism 7 is sterilized. A rangefinder 8 is installed horizontally at the top of the right side wall of the frame 1. When the main gear 5 drives the sterilization mechanism 7 to run, the rangefinder 8 measures the surface flatness of the workpiece. A pin 9 is installed horizontally at the top of the right side wall of the frame 1. The sterilization mechanism 7 includes a sterilization box 71 installed at the bottom of the left side wall of the frame 1. A heating lamp 72 is installed on the top of the inner wall of the sterilization box 71. When the heating lamp 72 is powered on, it generates heat to heat the workpiece, kill insect eggs, bacteria, etc. on the workpiece, and prevent the workpiece from being corroded for a long time. A material trough 73 is slidably connected to the bottom of the inner wall of the sterilization box 71. The material trough 73 is used to store the workpiece. A slide is provided at the bottom of the sterilization box 71. A slider that cooperates with the slide is provided in the material trough 73, so that the material trough 73 can slide stably left and right in the sterilization box 71. A traction rod 74 is installed horizontally on the right side wall of the material trough 73. The right end of the traction rod 74 extends out of the right side wall of the sterilization box 71 and is equipped with a plug rod 75. A toggle assembly 76 is installed in the middle of the right side wall of the sterilization box 71 through a bearing. The toggle assembly 76 can toggle the plug rod 75 left and right. The traction rod 74 pulls the material trough 73 to swing left and right. The workpiece rolls under its own curved surface, so that the workpiece is heated evenly.

[0024] This completely changes the problem of uneven heating in localized areas that is prone to occur with traditional static heating. It not only improves the sterilization effect but also effectively avoids carbonization damage caused by excessive local temperature of the workpiece, thus preserving the original structure and properties of the wood.

[0025] The sterilization mechanism 7 is powered by the main drive system of the equipment. The material trough 73 is automatically oscillating through the linkage between the actuation component 76 and the main gear 5 of the equipment. No separate power source is required, which simplifies the overall structure of the equipment and reduces energy consumption and failure probability. At the same time, no manual intervention is required to turn the workpieces throughout the process, realizing automated and uniform sterilization of column wood, greatly improving the efficiency of the sterilization process and adapting to the needs of large-scale wood processing.

[0026] As a preferred embodiment, the actuating assembly 76 further includes a first driven shaft 761 mounted on the right side wall of the sterilization chamber 71 via a bearing. The right end of the first driven shaft 761 extends into the frame 1 and is fitted with a first driven gear 762. The first driven gear 762 meshes with the main gear 5 to provide rotational power to the first driven shaft 761. A roller 763 is mounted on the left end of the outer wall of the first driven shaft 761. A guide groove 764 is provided on the outer wall of the roller 763. The insert rod 75 is inserted into the inner cavity of the guide groove 764. The guide groove 764 is wavy and distributed on the outer wall of the roller 763. Since the curved surfaces on both sides of each corner of the guide groove 764 have different directions, when the guide groove 764 rotates with the roller 763, the curved surface of the guide groove 764 moves the insert rod 75 back and forth, thereby realizing the left and right swing of the traction rod 74.

[0027] When the main gear 5 rotates with the main shaft 3, its meshing drives the first driven gear 762 to rotate synchronously, which in turn drives the first driven shaft 761 to drive the roller 763 to rotate in a circular motion. Because the guide groove 764 on the outer wall of the roller 763 has a wave-shaped structure, the extension direction of its groove surface continues to change regularly with the rotation of the roller 763, which forms a left-right reciprocating force on the insert rod 75 inserted in the groove. This force is transmitted to the material trough 73 through the traction rod 74, and finally drives the material trough 73 to swing smoothly left and right in a straight line along the slide in the sterilization box 71, so as to realize the natural rolling of the workpiece in the material trough 73.

[0028] It eliminates the need for separate power sources such as motors and cylinders, enabling multi-mechanism linkage drive with a single power source. This significantly simplifies the overall structural design of the equipment, reduces the investment cost of power components, lowers the overall energy consumption and probability of failure, and improves the stability of equipment operation.

[0029] By setting a continuous wave-shaped guide groove 764 on the outer wall of the drum 763, the circumferential rotation of the drum 763 is directly converted into the reciprocating linear motion of the insertion rod. The transmission method is direct and efficient, without any unnecessary transmission and reversing components. This ensures the regularity and stability of the oscillation of the material trough 73, and makes the rolling heating of the workpiece more uniform, thus improving the sterilization effect. At the same time, the sliding fit between the guide groove 764 and the insertion rod 75 results in low wear and high transmission efficiency, which is suitable for the needs of industrial continuous processing.

[0030] As a preferred embodiment, the ranging mechanism 8 further includes a slide rod 81 horizontally mounted on the top of the right side wall of the frame 1. A lead screw 82 is mounted on the top of the right side wall of the frame 1 via a bearing. The lead screw 82 is located at the bottom of the slide rod 81. A second driven gear 83, which meshes with the main gear 5, is installed at the left end of the lead screw 82 to provide power for the rotation of the lead screw 82. A moving component 84, which is threadedly engaged with the lead screw 82, is sleeved on the outer wall of the slide rod 81. The slide rod 81 supports the moving component 84. The moving component 84 is driven to move to the left or right by rotating the lead screw 82 clockwise or counterclockwise. One end of a limiting component 85 is sleeved on the outer wall of the slide rod 81. The other end of the limiting component 85 is sleeved with the lead screw 82. The limiting component 85 constrains the rightward movement distance of the moving component 84, and the flatness detection distance is adjusted according to the length of the workpiece.

[0031] As a preferred embodiment, the moving assembly 84 further includes a moving frame 841 screwed to the outer wall of the lead screw 82. The moving frame 841 is also sleeved with a slide rod 81. The lead screw 82 drives the moving frame 841 to move left and right. A bracket 842 is installed on the lower surface of the moving frame 841. Several distance sensors 843 electrically connected to the rangefinder 2 are installed on the outer wall of the bracket 842 from left to right. The distance sensors 843 emit lasers, which are reflected back to the photosensitive chip by the workpiece. The rangefinder 2 measures distance using the laser triangulation method. Multi-point distance measurement can compensate for the distance points missed when the workpiece rotates. A paint tank 844 is installed on the upper surface of the moving frame 841. The paint tank 844 stores the paint to be applied to the workpiece. A stirrer is installed inside the paint tank 844 to prevent the paint from settling or separating. A reversing unit 84 is installed on the front of the moving frame 841. 5. The bottom of the paint tank 844 is connected to the top of the reversing unit 845 via a pipe. The reversing unit 845 switches between flatness detection and workpiece coating operation modes. A lifter 846 is installed at the bottom of the right side wall of the moving frame 841. A brush 847 is installed at the output end of the lifter 846. The brush 847 is connected to the bottom of the reversing unit 845 via a pipe. The lifter 846 drives the brush 847 to descend. Under the control of the reversing unit 845, paint is supplied to the brush 847, allowing the brush 847 to evenly apply the paint to the workpiece surface. The distance sensor 843, the brush 847, and the fixture 6 are in the same plane, which can ensure that the laser emission position for flatness detection matches the primer coating position, effectively avoiding detection errors and uneven coating caused by position deviation, and ensuring the accuracy of flatness detection and primer coating operations.

[0032] The entire set of execution components for laser flatness inspection is integrated with the material storage, conveying, and coating components for automatic primer coating on the same mobile frame 841. Both operations are completed using the same mobile drive structure, eliminating the need for separate inspection and coating stations. This greatly simplifies the equipment structure, reduces processing steps, and improves the overall processing efficiency of column wood.

[0033] Several distance measuring sensors 843 are set at intervals along the horizontal direction. Combined with the laser triangulation method, multi-point synchronous distance measurement is realized, which effectively compensates for the distance measurement omissions that occur during the rotation of the cylindrical workpiece. It realizes the full-dimensional flatness detection of the workpiece surface. Compared with single-point detection, the detection results are more comprehensive and accurate, and can better ensure the consistency of product quality.

[0034] The switching between inspection and coating modes is achieved through the reversing unit 845. The paint conveying, brush 847 lifting, and moving frame 841 reversing movement are all linked and coordinated with the action of the reversing unit 845, so that after the flatness inspection is completed, the process can be seamlessly switched to the primer coating operation. The connection between each process is smooth, there is no manual intervention, and it is suitable for the needs of large-scale automated processing.

[0035] As a preferred embodiment, the limiting component 85 further includes a movable plate 851 sleeved on the outer wall of the slide rod 81 and the lead screw 82. A positioning bolt 852 is screwed onto the front of the movable plate 851. When the positioning bolt 852 is turned and contacts the outer wall of the slide rod 81, the movable plate 851 is positioned. A stop bar 853 at the same height as the reversing unit 845 is installed at the bottom of the front of the movable plate 851. The stop bar 853 can move the reversing unit 845, allowing the reversing unit 845 to switch between flatness detection and workpiece coating working states.

[0036] As a preferred embodiment, the reversing unit 845 further includes a valve body 8451 mounted on the front of the movable frame 841. The top of the valve body 8451 is connected to the bottom of the paint tank 844 via a pipe. A connecting rod 8452, penetrating through the inside and outside, is mounted on the center of the front of the valve body 8451 via a bearing. A rocker arm 8453 and a valve core 8454 are respectively mounted on the front and rear ends of the connecting rod 8452. The rocker arm 8453 and the valve core 8454 rotate synchronously. When the valve core 8454 rotates counterclockwise or clockwise, the valve body 8451 can be opened and closed. The rocker arm 8453 and the ejector pin 9 are at the same height. When the rocker arm 8453 moves to the left, the ejector pin 9 can push the rocker arm 8453 to swing clockwise, thereby triggering the reversing unit 845. A baffle 8455 is mounted on the front of the valve body 8451 to constrain the swing angle of the rocker arm 8453. Two left and right opposite openings are formed on the inner wall of the baffle 8455. The slot 8456 is called the "slot". Two symmetrical first proximity switches 8457 are installed on the outer wall of the baffle 8455. The first proximity switch 8457 on the left is electrically connected to the motor 4. The first proximity switch 8457 works with the motor 4 controller to control its closure. The first proximity switch 8457 on the right works with the controller. The motor 4 rotates in the opposite direction, causing the lead screw 82 to rotate counterclockwise. Springs 8458 and ball bearings 8459 are inserted into the inner cavity of the rocker arm 8453 from the inside to the outside. Under the elastic force of the spring 8458, the ball bearing 8459 is pushed into the slot 8456. This not only positions the rocker arm 8453, but also allows it to contact the first proximity switch 8457, triggering the first proximity switch 8457. The depth of the slot 8456 is less than the radius of the ball bearing 8459 to prevent the ball bearing 8459 from getting stuck in the slot 8456 and affecting the normal rotation of the rocker arm 8453.

[0037] When the movable frame 841 moves to the right to perform a flatness detection to the preset position, the swing arm 8453 contacts the stop bar 853 of the limit component 85. The stop bar 853 causes the swing arm 8453 to swing counterclockwise, and the ball 8459 is squeezed out from the left slot 8456. When the ball swings to the right slot 8456 with the swing arm 8453, the ball 8459 is inserted into the right slot 8456 under the elastic force of the spring 8458, triggering the right first proximity switch 8457. The motor 4 rotates in the opposite direction, driving the movable frame 841 to move to the left, and the valve core 8454 moves accordingly. The swing arm 8453 rotates synchronously to open the valve body 8451, opening the paint channel and enabling paint delivery. When the moving frame 841 moves to the left to complete the primer coating to the preset position, the swing arm 8453 contacts the ejector pin 9. The ejector pin 9 pushes the swing arm 8453 to swing clockwise, and the ball bearing 8459 is squeezed out from the right slot 8456 and inserted into the left slot 8456, triggering the left first proximity switch 8457. The motor 4 stops running, and at the same time, the valve core 8454 rotates synchronously to close the valve body 8451, cutting off the paint delivery and completing the entire process of detection and coating.

[0038] The angle switching of the swing arm 8453 is achieved by mechanically actuating the stop lever 853 and the ejector pin 9. Combined with the positioning of the spring 8458 and the ball bearing 8459 and the electrical signal triggering of the first proximity switch 8457, the working mode and the operating status of the motor 4 are synchronized. No manual intervention is required for the switching operation, achieving seamless connection between the detection and coating processes. It is suitable for large-scale automated processing needs, and the dual combination of mechanical and electrical methods greatly improves the accuracy and reliability of the switching action.

[0039] By constraining the maximum swing angle of the swing rod 8453 by the baffle 8455, the valve core 8454 is prevented from failing to open or close due to excessive swing. At the same time, the cooperation of the spring 8458, the ball bearing 8459 and the symmetrical groove 8456 is used to accurately position the two working positions of the swing rod 8453, ensuring that the valve core 8454 is always in a stable state of being fully open or fully closed, effectively preventing problems such as paint leakage and uneven delivery caused by the paint channel being half open and half closed.

[0040] The two first proximity switches 8457 are linked to the stop and reverse actions of the motor 4, respectively, so that the angle switching of the reversing unit 845 and the reversing movement of the moving frame 841 and the opening and closing of the paint channel form precise coordinated control. After the detection is completed, it automatically switches to the coating mode and provides coating power. After the coating is completed, it automatically stops and cuts off the paint, making the action connection of each process smoother and improving the overall processing efficiency.

[0041] As a preferred embodiment, the lifting device 846 further includes an electric telescopic rod 8461 installed at both ends of the right side wall of the movable frame 841. The electric telescopic rod 8461 is electrically connected to a first proximity switch 8457 on the right side for controlling the drive of the electric telescopic rod 8461. A lifting plate 8462 is installed at the output end of the electric telescopic rod 8461. A second proximity switch 8463, which is electrically connected to the electric telescopic rod 8461, is installed at the center of the lower surface of the lifting plate 8462. When the second proximity switch 8463 approaches the workpiece, it controls the electric telescopic rod 8461 to stop, thus constraining the descent height of the lifting plate 8462.

[0042] As a preferred embodiment, the brush 847 further includes a liquid distribution box 8471 horizontally installed at the center of the right side wall of the lifting plate 8462. The top of the liquid distribution box 8471 is connected to the bottom of the valve body 8451 through a pipe. The liquid distribution box 8471 stores the paint. Several discharge holes 8472 are opened from left to right on the lower surface of the liquid distribution box 8471. The discharge holes 8472 divert the paint. Brush bristles 8473 are evenly installed on the lower surface of the liquid distribution box 8471. The paint is evenly coated on the surface of the workpiece through the brush bristles 8473.

[0043] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0044] Step 1: The main gear 5 on the main shaft 3 is driven to rotate by the motor 4. The main gear 5 simultaneously drives the first driven gear 762 and the second driven gear 83 to rotate, thus realizing one-to-two operation. Step two: When the workpiece is placed in the material trough 73, the first driven shaft 761 drives the roller 863 to rotate. Since the guide groove 764 is wavy and its inclination direction changes, the curved surface of the guide groove 764 can repeatedly squeeze the insert rod 75 from left to right, causing the traction rod 74 to pull the material trough 73 to swing left and right. The columnar workpiece rolls in the material trough 73, constantly changing the position of the workpiece being heated. The heating lamp 72 heats the workpiece evenly, which can prevent the workpiece from carbonizing and use high temperature to kill insect eggs, bacteria, etc. in the workpiece, thus extending the service life of the workpiece. Step 3: After sterilization, the workpiece is centered and clamped by the fixture 6. The spindle 3 drives the workpiece to rotate. At the same time, the slide bar 81 supports the moving frame 841. The screw 82 drives the moving frame 841 to move to the right. The distance sensor 843 emits a laser towards the workpiece. As the workpiece rotates, the distance of the workpiece is measured in all directions to achieve the surface flatness detection of the cylindrical workpiece. Step four: During the rightward movement, when the swing rod 8453 contacts the stop rod 853, the swing rod 8453 is turned counterclockwise, and the ball 8459 is squeezed out from the left slot 8456 until the ball 8459 corresponds to the right slot 8456. With the help of the spring 8458, the ball 8459 is pushed into the right slot 8456, positioning the swing rod 8453. After the valve core 8454 and the swing rod 8453 rotate synchronously, the valve body 8451 is opened, and the paint in the paint tank 844 flows into the liquid distribution box 8471 for paint delivery. Step 5: The first proximity switch 8457 on the right is triggered by the ball bearing 8459, changing the rotation direction of the motor 4 and starting the electric telescopic rod 8461. Under the transmission conditions of the main gear 5 and the second driven gear 83, the lead screw 82 rotates counterclockwise, the moving frame 841 moves to the left, and the electric telescopic rod 8461 drives the liquid distribution box 8471 to descend. When the second proximity switch 8463 approaches the workpiece, it is triggered, the electric telescopic rod 8461 stops moving, the brush bristles 8473 come into contact with the workpiece, and the paint flows to the brush bristles 8473 after being diverted through the discharge hole 8472. As the workpiece rotates, the brush bristles 8473 evenly apply the paint to the workpiece, forming a protective layer on the surface of the workpiece to prevent corrosion. Step 6: Once the rocker arm 8453 contacts the ejector pin 9, the ejector pin 9 moves the rocker arm 8453 to rotate clockwise. The first proximity switch 8457 on the left side is triggered by the ball bearing 8459. The first proximity switch 8457 stops the motor 4, thus achieving the application of a protective layer to the workpiece. Step 7: When it is necessary to adjust the detection range according to the length of the workpiece, turn the positioning bolt 852 to release the positioning of the moving plate 851 from the sliding rod 81, allowing the moving plate 851 to move left and right along the sliding rod 81 and the lead screw 82, changing the position of the stop bar 853. When the positioning bolt 852 contacts the sliding rod 81, the moving plate 851 is repositioned. Therefore, adaptive detection can be performed according to the length of the workpiece, preventing unnecessary work due to excessive detection distance and improving detection and coating efficiency.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser inspection device for the flatness of wood processing, comprising a frame (1), a rangefinder (2), a spindle (3), a motor (4), a main gear (5), and a clamp (6), wherein the rangefinder (2) is installed at the top of the left side wall of the frame (1), the spindle (3) is installed in the middle of the right side wall of the frame (1) via bearings, the motor (4) is installed in the middle of the left side wall of the frame (1) and drives the spindle (3) to rotate, the main gear (5) is installed on the outer wall of the spindle (3), and the clamp (6) is installed at the right end of the spindle (3). After the clamp (6) centers and clamps the workpiece, it enables the workpiece to rotate. The device is characterized in that... A sterilization mechanism (7) is installed at the bottom of the left side wall of the frame (1). When the main gear (5) drives the sterilization mechanism (7) to run, the workpiece placed in the sterilization mechanism (7) is sterilized. A distance measuring mechanism (8) is installed horizontally at the top right side wall of the frame (1). When the main gear (5) drives the sterilization mechanism (7) to run, the distance measuring mechanism (8) measures the flatness of the workpiece surface. A pin (9) is installed horizontally at the top right side wall of the frame (1). The sterilization mechanism (7) includes a sterilization box (71) installed at the bottom of the left side wall of the frame (1). A heating lamp (72) is installed on the top of the inner wall of the sterilization box (71). The heating lamp (72) generates heat when powered on. A material trough (73) is slidably connected to the bottom of the inner wall of the sterilization box (71). The material trough (73) is used to store workpieces. The heat generated by the heating lamp (72) is used to heat the workpieces to achieve high-temperature sterilization. A traction rod (74) is installed horizontally on the right side wall of the material trough (73). The right end of the traction rod (74) extends out of the right side wall of the sterilization box (71) and is equipped with a plug rod (75). A toggle assembly (76) is installed in the middle of the right side wall of the sterilization box (71) through a bearing.

2. The laser detection device for wood processing flatness according to claim 1, characterized in that, The actuation assembly (76) includes a first driven shaft (761) mounted on the right side wall of the sterilization chamber (71) via a bearing. The right end of the first driven shaft (761) extends into the frame (1) and is equipped with a first driven gear (762). The first driven gear (762) meshes with the main gear (5) to provide rotational power to the first driven shaft (761). A roller (763) is mounted on the left end of the outer wall of the first driven shaft (761). A guide groove (764) is provided on the outer wall of the roller (763), and a rod (75) is inserted into the inner cavity of the guide groove (764).

3. The laser detection device for wood processing flatness according to claim 2, characterized in that, The guide groove (764) is distributed in a wave-like pattern on the outer wall of the roller (763).

4. The laser detection device for wood processing flatness according to claim 3, characterized in that, The ranging mechanism (8) includes a slide rod (81) horizontally mounted on the top of the right side wall of the frame (1). A lead screw (82) is mounted on the top of the right side wall of the frame (1) via a bearing. The lead screw (82) is located at the bottom of the slide rod (81). A second driven gear (83) that meshes with the main gear (5) is installed on the left end of the lead screw (82) to provide power for the rotation of the lead screw (82). A moving component (84) that is threadedly engaged with the lead screw (82) is sleeved on the outer wall of the slide rod (81). The moving component (84) is driven to move to the left or right by rotating the lead screw (82) clockwise or counterclockwise. One end of a limiting component (85) is sleeved on the outer wall of the slide rod (81). The other end of the limiting component (85) is sleeved with the lead screw (82). The limiting component (85) constrains the rightward movement distance of the moving component (84).

5. The laser detection device for wood processing flatness according to claim 4, characterized in that, The moving assembly (84) includes a moving frame (841) screwed to the outer wall of the lead screw (82). The moving frame (841) is also sleeved with a slide rod (81). The lead screw (82) drives the moving frame (841) to move left and right. A bracket (842) is installed on the lower surface of the moving frame (841). Several distance sensors (843) electrically connected to the rangefinder (2) are installed on the outer wall of the bracket (842) from left to right. The distance sensors (843) emit lasers, which are reflected back to the photosensitive chip by the workpiece. The rangefinder (2) measures the distance by laser triangulation reflection. A paint tank (844) is installed on the upper surface of the moving frame (841). (844) The workpiece needs to be coated with paint. The front of the moving frame (841) is equipped with a reversing unit (845). The bottom of the paint box (844) is connected to the top of the reversing unit (845) through a pipe. The bottom of the right side wall of the moving frame (841) is equipped with a lifter (846). The output end of the lifter (846) is equipped with a brush (847). The brush (847) is connected to the bottom of the reversing unit (845) through a pipe. The lifter (846) drives the brush (847) to descend. Under the control of the reversing unit (845), paint is supplied to the brush (847) so that the brush (847) can evenly coat the workpiece surface with paint.

6. The laser detection device for wood processing flatness according to claim 5, characterized in that, The ranging sensor (843), brush (847) and clamp (6) are in the same plane.

7. The laser detection device for wood processing flatness according to claim 6, characterized in that, The reversing unit (845) includes a valve body (8451) mounted on the front of the movable frame (841). The top of the valve body (8451) is connected to the bottom of the paint tank (844) via a pipe. A connecting rod (8452) is mounted on the center of the front of the valve body (8451) via a bearing. A swing rod (8453) and a valve core (8454) are respectively mounted on the front and rear ends of the connecting rod (8452). When the valve core (8454) rotates, the valve body (8451) can be opened and closed. A baffle (8455) is mounted on the front of the valve body (8451) to constrain the swing angle of the swing rod (8453). Two symmetrical slots (8456) are opened on the inner wall of the baffle (8455). Two symmetrical first proximity switches (8457) are installed on the wall. The first proximity switch (8457) on the left is electrically connected to the motor (4). The first proximity switch (8457) works with the motor (4) controller to control its closure. The first proximity switch (8457) on the right works with the controller to make the motor (4) rotate in the opposite direction, causing the lead screw (82) to rotate counterclockwise. The inner cavity of the swing arm (8453) is fitted with a spring (8458) and a ball (8459) from the inside to the outside. Under the elastic force of the spring (8458), the ball (8459) is pushed into the slot (8456), which not only positions the swing arm (8453) but also contacts the first proximity switch (8457) to trigger the first proximity switch (8457).

8. The laser detection device for wood processing flatness according to claim 7, characterized in that, The swing arm (8453) and the ejector pin (9) are at the same height.

9. The laser detection device for wood processing flatness according to claim 8, characterized in that, The depth of the slot (8456) is less than the radius of the ball (8459).

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