Bar length detecting and distributing device

Abstract

The utility model discloses a bar length detecting and distributing device. The device comprises a stock bin mechanism used for storing workpieces; the length measuring mechanism comprises a storage rail, a guide rail, a first measuring assembly and a second measuring assembly, the first measuring assembly and the second measuring assembly are arranged on the guide rail, a first measuring head and a first length meter are arranged on the first measuring assembly, a second measuring head and a second length meter are arranged on the second measuring assembly, and a length measuring area is arranged on the storage rail; the lifting mechanism comprises a lifting assembly used for lifting the workpieces from the stock bin mechanism to the storage rail. The monitoring mechanism comprises an image acquisition part, an image acquisition head of the image acquisition part is arranged above the object placing rail, and when no workpiece exists on the object placing rail, the control mechanism controls the lifting assembly to lift the workpiece to the moving distance between the object placing rail and the first measuring head and the moving distance between the object placing rail and the second measuring head. According to the bar length detection shunting device, a lifting mode is adopted, clamping and damage to workpieces are avoided, the measurement speed and precision are increased, and the bar length detection shunting device can adapt to workpieces with various end face shapes.

Description

Technical Field

[0001] This application relates to the field of detection technology, and in particular to a bar length detection and diversion device. Background Technology

[0002] Currently, in the mass production of round bar workpieces, there is a situation where the total length changes abruptly due to tool wear or insufficient spindle clamping force. This requires a large amount of manpower to measure all the scattered workpieces on the unloading platform and distinguish between good and bad products.

[0003] Existing measurement methods primarily involve using a robotic arm to grip and place the workpiece at the measurement station, followed by measurement using a measuring pen or laser rangefinder. These methods require the robotic arm to grasp the workpiece, resulting in low gripping speed and an inability to handle workpieces with varied shapes at both ends, such as those with holes, grooves, or spherical surfaces on the end face. The robotic arm struggles to quickly locate the outermost edge of the end face, leading to measurement errors. Furthermore, the robotic arm may damage workpieces with grooves or threads on their surfaces. Additionally, metal debris adhering to the workpiece and grippers can easily damage the workpiece during gripping. Using a measuring pen or laser rangefinder is inefficient, and deviations exist between the starting and ending points of the measurement, resulting in low accuracy in workpiece length measurement. Utility Model Content

[0004] The purpose of this application is to provide a bar stock length detection and diversion device that uses a lifting method instead of gripping to avoid pinching and damaging the workpiece, adopts a bidirectional centering method for measurement, halves the measurement distance, improves measurement efficiency, and uses a sensing sensor to accurately control the magnitude of the measuring force, thereby improving measurement accuracy.

[0005] This application provides a bar stock length detection and diversion device, comprising: a hopper mechanism for storing workpieces; a length measuring mechanism including a storage rail, a guide rail, and a first measuring component and a second measuring component slidably disposed on the guide rail, wherein the first measuring component is provided with a first measuring head and a first length measuring instrument for measuring the moving distance of the first measuring head, and the second measuring component is provided with a second measuring head and a second length measuring instrument for measuring the moving distance of the second measuring head; a length measuring area is provided on the storage rail; and a lifting mechanism including a mechanism for lifting the workpiece from the hopper mechanism to the storage rail. A lifting assembly; a monitoring mechanism including an image acquisition unit, the image acquisition head of which faces the placement rail; a control mechanism, communicatively connected to the monitoring mechanism and the length measuring mechanism, which controls the lifting assembly to lift the workpiece onto the placement rail when there is no workpiece on the placement rail; and controls the first measuring head and the second measuring head to slide laterally opposite each other until the pressure values ​​at both ends of the workpiece are equal to preset values ​​when there is a workpiece on the placement rail, and calculates the length of the workpiece by using the initial lateral distance between the first measuring head and the second measuring head, the value of the first length measuring device, and the value of the second length measuring device.

[0006] Optionally, the first measuring component is further provided with a first detection sensor that is communicatively connected to the control mechanism, and the second measuring component is further provided with a second detection sensor that is communicatively connected to the control mechanism; when the first detection sensor and the second detection sensor detect a workpiece, the control mechanism transmits deceleration signals to the drive components of the first measuring component and the second measuring component respectively to control the first measuring head and the second measuring head to decelerate.

[0007] Optionally, the length measuring mechanism is further provided with a positioning component, which includes a base plate mounted on the guide rail and a pressure plate rotatably connected to the base plate. A pressure block is provided on the pressure plate, and the pressure block faces the length measuring area. When the workpiece moves to the length measuring area, the pressure plate rotates until the pressure block presses against the workpiece. After the workpiece length measurement is completed, the pressure plate rotates until the pressure block disengages from the workpiece.

[0008] Optionally, the positioning assembly further includes a mounting plate connected to the base plate, on which a telescopically oriented drive rod is mounted. When the drive rod extends, it abuts against the pressure plate to drive the pressure plate to rotate and cause the pressure block to disengage from the workpiece. The positioning assembly also includes an elastic element, with both ends of the elastic element connected between the mounting plate and the pressure plate and in a stretched state, so that after the drive rod disengages from the pressure plate, it drives the pressure block to press against the workpiece.

[0009] Optionally, the lifting mechanism includes a primary lifting assembly and a secondary lifting assembly; the primary lifting assembly includes a liftable primary lifting plate, and the secondary lifting assembly includes a secondary lifting plate. The top surface of the primary lifting plate is used to lift the workpiece in the hopper mechanism and is inclined toward the secondary lifting plate. When the top surface of the primary lifting plate rises to be level with or higher than the top surface of the secondary lifting plate, the workpiece on the primary lifting plate moves to the secondary lifting plate.

[0010] Optionally, the top of the secondary lifting plate is provided with a storage opening for placing the workpiece, the storage rail is located on the lateral side of the storage opening, and a lifting assembly that can move laterally is provided below the secondary lifting plate. When the lifting assembly lifts, it drives the workpiece to move upward and guides the workpiece to the storage rail through the inclined top surface of the lifting assembly. The inclined surface is inclined towards the storage rail.

[0011] Optionally, the lifting assembly includes a sliding rail and a lifting member slidably disposed on the sliding rail. The lifting member includes a lifting rod that can be raised and lowered, and the inclined top surface is located on the lifting rod.

[0012] Optionally, the bar length detection and diversion device further includes a material distribution mechanism, which includes a platform located behind the placement rail. The platform is rotatable to transport the passing workpieces to the good product box and the defective product box respectively.

[0013] Optionally, the bar length detection and diversion device further includes a release mechanism, which includes a power component mounted on a mounting plate of the guide rail, and an output component mounted on the power component; the rear of the placement rail is provided with a vertically extending baffle plate, a release plate, and a transition plate bent and connected to the release plate, the transition plate being located between the release plate and the platform; the release plate is connected to the output component, and the output component can be raised and lowered under the drive of the power component, so that when the workpiece on the placement rail is measured in length, it rises and drives the release plate to rise synchronously, blocking the workpiece through the side baffle plate of the release plate, and after the workpiece measurement is completed, it lowers so that the transition plate aligns with one side of the placement rail, and the workpiece enters the platform from the transition plate.

[0014] Optionally, the monitoring mechanism is located above the hopper mechanism, and the monitoring mechanism further includes a light source assembly. The hopper mechanism, the length measuring mechanism, and the lifting mechanism are all located within the illumination range of the light source assembly.

[0015] The above technical solution has the following beneficial effects:

[0016] The bar stock length detection and diversion device provided in this application lifts the workpiece to a placement rail via a lifting mechanism. A length measuring area is set on the placement rail as the workpiece length measurement area. The lifting mechanism replaces gripping with lifting, avoiding pinching and damage to the workpiece. Furthermore, the lifting method does not require contact with both ends of the workpiece, allowing for flexible handling of workpieces with varying end shapes. During measurement, the first and second measuring heads respectively abut against both ends of the workpiece along its length, serving as the starting and ending points for measurement. The first and second length sensors measure the workpiece length, increasing measurement accuracy and speed compared to manual measurement. Through a multi-stage parallel synchronous lifting mechanism, a small number of workpieces can be separated from the scattered workpieces in the hopper at a time, while shortening the distance between each lifting plate and the next, enabling rapid sorting and feeding of scattered workpieces. An image acquisition device guides the secondary lifting assembly to laterally select and lift individual workpieces, fulfilling the requirement for single-workpiece feeding and providing a basis for measuring the length of each workpiece individually. The measurement method employs a bidirectional synchronous centering approach using both the first and second measuring heads, halving the measurement distance and improving efficiency. First and second detection sensors control the detection speed, enabling rapid approach to the workpiece and low-speed measurement at the final stage. Precise control of the measuring force is achieved by preset pressure values ​​between the first and second measuring heads and the workpiece, further enhancing efficiency and accuracy. A release mechanism avoids the use of complex and inefficient gripping mechanisms, improving workpiece discharge speed and reducing energy consumption. A flipping stage enables rapid separation of good and defective products, ultimately achieving the function of quickly measuring and separating the total length of scattered bar stock workpieces. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the bar length detection and diversion device in one embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the length measuring mechanism in one embodiment of this application.

[0019] Figure 3 This is a three-dimensional model of the length measuring mechanism in one embodiment of this application.

[0020] Figure 4 This is a schematic diagram of the structure of a primary lifting component in one embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the structure of a two-stage lifting assembly in one embodiment of this application.

[0022] Figure 6 This is a schematic diagram of the material dispensing mechanism in one embodiment of this application.

[0023] Figure 7This is a schematic diagram of the structure of the shunt component in one embodiment of this application.

[0024] Figure 8 This is a three-dimensional structural schematic diagram of the shunt component in one embodiment of this application.

[0025] Figure 9 This is a schematic diagram of the silo mechanism in one embodiment of this application.

[0026] Figure 10 This is a side view of a 3D model of a silo mechanism in one embodiment of this application.

[0027] Label Explanation:

[0028] 1-Monitoring unit, 11-Image acquisition unit, 12-Light source assembly.

[0029] 2-Length measuring mechanism, 20-Placement rail, 21-Guide rail, 22-First measuring component, 220-First measuring head, 221-First force sensor, 222-First detection sensor, 23-Second measuring component, 230-Second measuring head, 231-Second force sensor, 232-Second detection sensor, 24-Positioning component, 240-Base plate, 241-Rotating shaft, 242-Pressure plate, 243-Pressure block, 244-Mounting plate, 245-Drive rod, 246-Pressure head, 247-Elastic element, 248-First support component, 249-Second support component, 25-Nut, 26-Blocking plate, 27-Passage port, 28-Release plate.

[0030] 3-Lifting mechanism, 30-First-stage lifting assembly, 300-Base plate, 301-Side plate, 302-First-stage lifting plate, 303-First sub-plate, 304-Second sub-plate, 305-Connecting plate, 306-Lifting drive cylinder, 307-Support plate, 31-Second-stage lifting assembly, 310-Lifting assembly, 311-Sliding rail, 312-Lifting component, 313-Slider, 314-Connecting block, 315-Electric actuator, 316-Connecting block.

[0031] 4-Hopper mechanism, 40-Hopper box, 41-Hopper support, 42-Collection rod, 43-Intermediate component.

[0032] 5-Distribution mechanism, 50-Platform, 51-Good product box, 510-Good product channel, 52-Defective product box, 520-Defective product channel, 53-Distribution bracket, 530-First bearing with seat, 531-Positioning plate, 532-First support plate, 54-Transfer shaft, 540-First rotary actuator, 541-First coupling, 55-Distribution roller, 550-Second rotary actuator, 551-Second support plate, 552-Second bearing with seat, 553-Second coupling, 56-Distribution shaft, 560-Distribution bearing, 57-Flow diversion assembly, 570-Connecting plate, 571-Support block, 572-Guide plate, 573-First sensor, 574-Second sensor, 58-Distribution slot.

[0033] 6-Release mechanism, 60-Power component, 61-Output component, 62-Side support component, 63-Panace. Detailed Implementation

[0034] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0035] It is readily understood that, based on the technical solution of this utility model, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0036] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0037] like Figure 1 As shown, this application provides a bar stock length detection and diversion device, including: a hopper mechanism 4, a length measuring mechanism 2, a lifting mechanism 3, and a monitoring mechanism 1.

[0038] like Figure 9 As shown, the hopper mechanism 4 includes a hopper box 40, which is used to receive and store workpieces transferred from the previous process or the material frame.

[0039] like Figures 2 to 3As shown, the length measuring mechanism 2 includes a placement rail 20, a guide rail 21, and a first measuring component 22 and a second measuring component 23 that are slidably disposed on the guide rail 21. The first measuring component 22 is provided with a first measuring head 220, a first force sensor 221 that senses the pressure on the first measuring head 220, and a first length measuring instrument that measures the moving distance of the first measuring head 220. The second measuring component 23 is provided with a second measuring head 230, a second force sensor 231 that senses the pressure on the second measuring head 230, and a second length measuring instrument that measures the moving distance of the second measuring head 230. The placement rail 20 is provided with a length measuring area.

[0040] In this embodiment, the length measuring area refers to the region on the rail used for measuring the length of the workpiece. Please refer to... Figures 2 to 3 In one optional embodiment of the length measuring area, the length measuring area is located at the middle position of the placement rail 20 along the length direction (the lateral distance between the length measuring area and the first measuring head 220 and the second measuring head 230 from the initial position is the same). The first measuring head 220 and the second measuring head 230 move synchronously relative to each other in the length measuring area to measure the workpiece. In one optional embodiment of the placement rail 20, the upper surface of the placement rail 20 is used to place the workpiece. The first measuring component 22 and the second measuring component 23 can simultaneously move towards each other along the placement rail 20 to clamp the workpiece, or simultaneously move away from each other along the placement rail 20 after a single measurement.

[0041] The control mechanism is communicatively connected to the monitoring mechanism 1, the length measuring mechanism 2, and the lifting mechanism 3. When there is no workpiece on the placement rail 20, it receives a signal from the monitoring mechanism 1 and controls the lifting mechanism 3 to lift the workpiece onto the placement rail 20. When there is a workpiece on the placement rail 20, the control mechanism receives a signal from the monitoring mechanism 1 and controls the first measuring head 220 and the second measuring head 230 to slide towards each other until the pressure values ​​at both ends of the workpiece are equal to preset values. The length of the workpiece is obtained by using the initial lateral distance between the first measuring head 220 and the second measuring head 230, the value of the first length measuring device, and the value of the second length measuring device.

[0042] The initial lateral distance between the first measuring head 220 and the second measuring head 230 can be L1. When the pressure between the first measuring head 220 and the workpiece reaches a preset value, the lateral movement distance of the first measuring head 220 measured by the first length measuring instrument is L2. When the pressure between the second measuring head 230 and the workpiece reaches a preset value, the lateral movement distance of the second measuring head 230 measured by the second length measuring instrument is L3. Then, the length of the workpiece L4 = (L1 - L2 - L3). When the first measuring head 220 and the second measuring head 230 move laterally by the same distance in a synchronously aligned manner, the length of the workpiece L4 = (L1 - 2L2) or L4 = (L1 - 2L3).

[0043] The first measuring head 220 and the second measuring head 230 are arranged opposite to each other. The first force sensor 221 is located on the side of the first measuring head 220 facing away from the second measuring head 230, and the second force sensor 231 is located on the side of the second measuring head 230 facing away from the first measuring head 220. The first force sensor 221 and the first measuring head 220 are detachably connected by means of snap-fit ​​or bolt connection, and the second force sensor 231 and the second measuring head 230 are detachably connected by means of snap-fit ​​or bolt connection. The first measuring head 220 and the second measuring head 230 are in direct contact with the workpiece, which not only increases the contact area with the workpiece, but also allows for timely replacement after wear on the contact surface, avoiding damage to the first force sensor 221 and the second force sensor 231 caused by long-term direct contact with the workpiece.

[0044] When the first measuring head 220 and the second measuring head 230 slide toward each other to clamp the two ends of the workpiece respectively, the first force sensor 221 and the second force sensor 231 detect the pressure values ​​of the first measuring head 220 and the second measuring head 230 respectively.

[0045] The preset pressure value can be a value between 1N and 10N, preferably 2N. When the pressure between the first measuring head 220 and the second measuring head 230 and the workpiece reaches the above value, the first measuring head 220 and the second measuring head 230 stop moving, which can stably clamp the two ends of the workpiece and avoid damaging the workpiece.

[0046] The first length measuring device can be a displacement sensor integrated on the first measuring component 22; or, when the first measuring component 22 is driven by components such as a lead screw and nut, the first length measuring device can be a structure that records the number of rotations (or pulses) of the lead screw. Based on the distance the first measuring component 22 moves horizontally in a single rotation of the lead screw, the horizontal movement distance of the first measuring head 220 can be calculated based on the number of rotations (or pulses) of the lead screw driving the first measuring head 220 from its initial position until it slides to a point where the pressure value at both ends of the workpiece equals a preset value. Those skilled in the art can configure a second length measuring device according to the above configuration of the first length measuring device.

[0047] The lifting mechanism 3 includes a lifting assembly for lifting the workpiece from the hopper mechanism 4 to the storage rail 20.

[0048] The monitoring unit 1 includes an image acquisition unit 11. The image acquisition head of the image acquisition unit 11 faces the placement rail 20. When there is no workpiece on the placement rail 20, the lifting assembly is controlled by the controller to lift the workpiece onto the placement rail 20.

[0049] The hopper mechanism 4 includes a hopper support 41, on which a data acquisition rod 42 is horizontally mounted. An image acquisition device 11 is connected to the data acquisition rod 42 via an intermediate component 43. The image acquisition device 11 may include a lens, an image sensor, and an analog-to-digital converter. The intermediate component 43 may be a flat plate, an L-shaped, or a Z-shaped connecting plate.

[0050] The controller can be a PLC (Programmable Logic Controller). The PLC controls the image acquisition unit 11 to acquire images. The image acquisition unit 11 transmits the acquired digital image information to the program in the industrial control computer for processing. Then, the processed information is transmitted back to the PLC, which then controls the length measuring mechanism 2 and the lifting mechanism 3 to perform corresponding actions. The controller can also be a PC. For the convenience of operators, it can also be equipped with a display screen. The image acquisition unit 11 communicates with the controller to convert the acquired images into digital information and transmit it to the controller. When the controller determines that there is no workpiece on the placement rail 20, it controls the lifting mechanism 3 to lift the workpiece from the hopper mechanism 4 to the placement rail 20.

[0051] The controller can be integrated into components such as the hopper mechanism 4, length measuring mechanism 2, lifting mechanism 3, and monitoring mechanism 1, or it can be controlled independently. The specific settings can be adapted according to the control requirements.

[0052] The bar length detection and diversion device provided in this application embodiment lifts the workpiece to the placement rail 20 through the lifting mechanism 3. The length measuring area set on the placement rail 20 is the workpiece length measurement area. The lifting mechanism 3 does not need to grab the workpiece during the lifting process, avoiding pinching and damage to the workpiece. Moreover, the lifting method replaces grabbing, and there is no need to contact the two ends of the workpiece, which can flexibly deal with workpieces with different shapes at both ends. In addition, the lateral movement distance of the first measuring head 220 and the second measuring head 230 is controlled by the preset pressure value, avoiding damage to the workpiece and improving measurement efficiency and accuracy.

[0053] In an optional embodiment, the first measuring component 22 is further provided with a first detection sensor 222 that is communicatively connected to the control mechanism, and the second measuring component 23 is further provided with a second detection sensor 232 that is communicatively connected to the control mechanism; when the first detection sensor 222 and the second detection sensor 232 detect a workpiece, they respectively transmit deceleration signals to the driving components of the first measuring component 22 and the second measuring component 23 to control the first measuring head 220 and the second measuring head 230 to decelerate.

[0054] In this embodiment of the application, the driving components of the first measuring component 22 and the second measuring component 23 can be ball screw assemblies. The first measuring component 22 and the second measuring component 23 are respectively provided with ball sleeves. Two motors are mounted on the guide rail 21, and the output ends of the motors are connected to ball screws. The first measuring component 22 and the second measuring component 23 are moved by rotating the two ball screws in the ball sleeves respectively.

[0055] The control mechanism is communicatively connected to the motor controller. Upon receiving a signal from the image acquisition unit 11, it controls the first measuring component 22 and the second measuring component 23 to activate, causing the first measuring head 220 and the second measuring head 230 to move rapidly towards the center. The control mechanism is also communicatively connected to the first detection sensor 222 and the second detection sensor 232. Upon receiving a signal from the first detection sensor 222 and the second detection sensor 232 indicating that a workpiece has been detected, the control mechanism controls the motor to decelerate. This deceleration, in turn, causes the first measuring head 220 and the second measuring head 230 to decelerate, approaching the workpiece at a low speed to reduce impact, ensure measurement accuracy, and protect the workpiece and the measuring mechanism.

[0056] Both the first detection sensor 222 and the second detection sensor 232 can be photoelectric sensors used to detect the presence of a workpiece. The distance between the first detection sensor 222 and the first measuring head 220 is set to 5mm, and the distance between the second detection sensor 232 and the second measuring head 230 is also set to 5mm. When the lateral distance between the first measuring head 220 and the workpiece is 5mm-7mm, the first detection sensor 222 can detect the workpiece; when the lateral distance between the second measuring head 230 and the workpiece is 5mm-7mm, the second detection sensor 232 can detect the workpiece.

[0057] In an optional embodiment, the length measuring mechanism 2 is further provided with a positioning component 24. The positioning component 24 includes a base plate 240 mounted on the guide rail 21 and a pressure plate 242 rotatably connected to the base plate 240. A pressure block 243 is provided on the pressure plate 242, and the pressure block 243 faces the length measuring area. When the workpiece moves to the length measuring area, the pressure plate 242 rotates until the pressure block 243 presses against the workpiece. After the workpiece length measurement is completed, the pressure plate 242 rotates until the pressure block 243 disengages from the workpiece. Figures 2 to 3 As shown, the base plate 240 can be mounted on the guide rail 21 by means of bolts or other methods. The base plate 240 can adopt a "U"-shaped structure, and the pressure plate 242 is rotatably connected to the inside of the "U"-shaped opening of the base plate 240 via a rotating shaft 241. The pressure plate 242 is bent, and the pressure block 243 is located at the end of the pressure plate 242. When the workpiece is moved to the length measuring area, the pressure plate 242 rotates until the pressure block 243 abuts against the workpiece. The pressure block 243 applies lateral force to the workpiece to increase the stability of the workpiece in the length measuring area and ensure the accuracy of the workpiece length measurement.

[0058] In one alternative embodiment of the pressure block 243, an elastic pad made of materials such as rubber, silicone, or sponge is provided on the side of the pressure block 243 facing the storage rail 20 to prevent the pressure block 243 from damaging the workpiece.

[0059] In an optional embodiment, the positioning assembly 24 further includes a mounting plate 244 connected to the base plate 240. A retractable drive rod 245 is mounted on the mounting plate 244. When extended, the drive rod 245 abuts against the pressure plate 242 to drive the pressure plate 242 to rotate and disengage the pressure block 243 from the workpiece. The positioning assembly 24 also includes an elastic element 247, with both ends connected between the mounting plate 244 and the pressure plate 242 and in a stretched state, so that after the drive rod 245 disengages from the pressure plate 242, it drives the pressure block 243 to press against the workpiece. Figures 2 to 3 As shown, the mounting plate 244 extends vertically upwards, providing space for the extension and retraction of the drive rod 245. Both the elastic element 247 and the drive rod 245 are located above the pressure plate 242 and behind the rotating shaft 241. When the drive rod 245 retracts, the elastic element 247, which is in a stretched state, retracts under its own restoring force, thereby causing one end of the pressure block 243 on the pressure plate 242 to press down onto the workpiece. The elastic force of the elastic element 247 is relatively small, which can prevent damage to the workpiece.

[0060] In one optional embodiment of the drive rod 245, the drive rod 245 is driven and connected to a drive cylinder, and the extension and retraction of the drive rod 245 are achieved by driving the drive cylinder. The drive cylinder can be a pneumatic cylinder, hydraulic cylinder, or electric drive cylinder, etc., and the cylinder body is mounted on the mounting plate 244. In response to the control of the control component, it drives the drive rod 245 to extend or retract. The end of the drive rod 245 can be provided with a pressure head 246, which presses against the pressure plate 242. The pressure block 243 can be an elastic material with a cross-sectional area larger than that of the drive rod 245, protecting the pressure plate 242 while increasing the uniformity of force on the pressure plate 242. The controller of the drive cylinder receives signals from the control component. When the first detection sensor 222 and the second detection sensor 232 detect a workpiece, the control mechanism controls the drive cylinder to start, the drive rod 245 retracts, and the pressure block 243 presses against the side of the workpiece under the action of the spring return force.

[0061] In one alternative embodiment of the elastic element 247, the elastic element 247 is a spring, and the two ends of the spring are fixed to the mounting plate 244 and the pressure plate 242 respectively by the first support member 248 and the second support member 249. The first support member 248 and the second support member 249 can both be screws, and the two ends of the spring are respectively hooked onto the screws and fastened to the mounting plate 244 and the pressure plate 242 by nuts 25.

[0062] In an optional embodiment, the lifting mechanism 3 includes a primary lifting assembly 30 and a secondary lifting assembly 31; the primary lifting assembly 30 includes a liftable primary lifting plate 302, and the secondary lifting assembly 31 includes a secondary lifting plate. The top surface of the primary lifting plate 302 is used to lift the workpiece in the hopper mechanism 4 and is inclined toward the secondary lifting plate. When the top surface of the primary lifting plate 302 rises to be flush with or higher than the top surface of the secondary lifting plate, the top surface of the primary lifting plate 302 guides the workpiece to the secondary lifting plate.

[0063] In one alternative embodiment of the first-stage lifting plate 302, such as Figure 4 As shown, the primary lifting assembly 30 includes a base plate 300 and two side plates 301 respectively disposed on both sides of the primary lifting plate 302. The primary lifting plate 302 includes a first sub-plate 303, a middle plate, and a second sub-plate 304 arranged sequentially or at intervals. The middle plate is fixed between the two side plates 301. The first sub-plate 303 and the second sub-plate 304 are fixedly connected by a connecting plate 305. A lifting drive cylinder 306 is disposed between the connecting plate 305 and the base plate 300. The extension and retraction of the telescopic rod on the lifting drive cylinder 306 drives the first sub-plate 303 and the second sub-plate 304 to rise or fall simultaneously.

[0064] In one optional implementation of lifting the workpiece by the first-stage lifting plate 302, the top surface of the first plate 303, the top surface of the intermediate plate, and the top surface of the second plate 304 are all inclined surfaces. When the telescopic rod of the lifting drive cylinder 306 is in the retracted state, the top surface of the first plate 303 is located below the workpiece in the hopper mechanism 4, and the top surface of the second plate 304 is lower than the top surface of the intermediate plate. Initially, the top surface of the second partition plate 304 has a workpiece. When the telescopic rod of the lifting drive cylinder 306 extends, the second partition plate 304 rises, and in the process of rising, it drives the workpiece on the top surface to rise as well. Until the second partition plate 304 rises to a point where its top surface is level with or higher than the top surface of the secondary lifting plate, the workpiece on the primary lifting plate 302 moves to the secondary lifting plate. At the same time, the first partition plate 303 and the second partition plate 304 rise synchronously to a point where their top surfaces are level with or higher than the top surface of the intermediate plate, moving the workpiece on the top surface to the top surface of the intermediate plate. The first partition plate 303 and the second partition plate 304 then descend synchronously until the first partition plate 303 sinks again below the workpiece in the hopper mechanism 4. The top surface of the second partition plate 304 descends to a point where its top surface is level with or lower than the top surface of the intermediate plate, and the workpiece on the top surface of the intermediate plate moves to the top surface of the second partition plate 304 under the guidance of the inclined top surface.

[0065] In addition, the top surface of the second plate 304 is inclined toward the second-stage lifting plate. The second plate 304 can be in contact with the second-stage lifting plate or the distance between them is less than the outer diameter of the workpiece, so that the first-stage lifting plate 302 is always stably set on the top surface of the first-stage lifting plate 302 during the lifting process.

[0066] In an optional implementation, the top of the secondary lifting plate has a storage opening for placing the workpiece, such as... Figure 5 As shown, the storage rail 20 is located on the lateral side of the storage opening. Below the secondary lifting plate, a laterally movable lifting assembly 310 is provided. When the lifting assembly 310 lifts, it moves the workpiece upwards and guides it to the storage rail 20 via its inclined top surface. The inclined surface slopes towards the storage rail 20. The top of the lifting assembly 310 enters the storage opening during lifting. Upon further lifting, the inclined surface lifts the workpiece placed laterally on the storage opening and guides it onto the storage rail 20 when the inclined surface is higher than the storage rail 20.

[0067] In an alternative embodiment where the lifting assembly 310 can slide laterally, such as Figure 5 As shown, a sliding rail 311 is provided below the secondary lifting plate. The main structure of the lifting assembly 310 is equipped with a slider 313 that can slide on the sliding rail 311. The slider 313 is driven by a lead screw structure. Specifically, a lead screw sleeve is installed on the slider 313 via bolts, welding, or other means connected to a connecting block 314. An electric actuator 315 is installed at one end of the sliding rail 311. The electric actuator 315 drives the lead screw located inside the lead screw sleeve to rotate, thereby causing the lifting assembly 310 to move laterally along the sliding rail 311.

[0068] In one optional embodiment of the lifting member 312, the lifting member 312 includes a drive cylinder (including a pneumatic cylinder, hydraulic cylinder, or electric cylinder, etc.) and a push rod located on the drive cylinder. The push rod is telescopically oriented, with an inclined top surface located on the push rod. When the push rod rises, it drives the workpiece to move upward from the placement opening. The push rod is connected to the drive cylinder via a connecting block 316, wherein the connecting block 316 can be a bolt or other connection structure.

[0069] In an optional embodiment, the bar length detection and diversion device further includes a material distribution mechanism 5, which includes a platform 50 located behind the loading rail 20. The platform 50 is rotatably configured to convey passing workpieces to the good product box 51 and the defective product box 52 respectively. Figure 6As shown, the platform 50 has positioning plates 531 at both ends along its length. One end of the platform 50 along its length is connected to a connecting shaft 54, allowing it to rotate under the rotation of the connecting shaft 54. The upper part of the platform 50 is a good product channel 510 for good products, and the lower part is a defective product channel 520 for defective products. When the length of the workpiece meets the requirements, the platform 50 rotates to cover the defective product channel 520 and aligns with the rear of the placement rail 20, allowing qualified workpieces to pass through the upper part of the platform 50. When the length of the workpiece does not meet the requirements, the platform 50 rotates and rises to form an opening between itself and the placement rail 20, opening the defective product channel 520. Defective workpieces can then directly enter the defective product channel 520 from the rear of the placement rail 20 through the opening.

[0070] In a specific implementation of the material distribution mechanism 5, such as Figure 6 As shown, the material distribution mechanism 5 includes a fixedly installed material distribution bracket 53, a positioning plate 531 mounted on the material distribution bracket 53, and a first support plate 532 mounted on the material distribution bracket 53. A first rotary actuator 540, such as a motor, is mounted on the first support plate 532. A first bearing 530 is also provided on the portion of the positioning plate 531 through which the adapter shaft 54 ​​passes. After passing through the first bearing 530, the adapter shaft 54 ​​is connected to the output end of the first rotary actuator 540 via a first coupling 541.

[0071] In another optional embodiment of the material distribution mechanism 5, such as Figure 7 and Figure 8 As shown, a material distribution roller 55 is also provided behind the platform 50. The outer side of the material distribution roller 55 is provided with multiple strip-shaped material distribution slots 58. The multiple material distribution slots 58 are arranged along the circumference of the material distribution roller 55. A material distribution shaft 56 is installed at the end of the material distribution roller 55. The material distribution shaft 56 is driven to rotate through the output end of the second rotary actuator 550 located on one side of the positioning plate 531 via the second coupling 553. A second seated bearing 552 is installed on the positioning plate 531. The material distribution shaft 56 passes through the second seated bearing 552.

[0072] The material distribution shaft 56 is rotatably mounted on another positioning plate 531 via the material distribution bearing 560. The second rotary actuator 550 is mounted on the material distribution bracket 53 via the second support plate 551. After passing through the platform 50, the good workpiece enters the material distribution slot 58. Driven by the rotation of the material distribution roller 55, the multiple material distribution slots 58 sequentially receive the good workpieces on the platform 50 and transport the workpieces to the diversion assembly 57.

[0073] In one alternative embodiment of the diversion assembly 57, a connecting plate 570 is provided behind the distributing roller 55. The connecting plate 570 is fixedly mounted on the distributing bracket 53 by a support block 571, and is used to receive workpieces rolling down from the distributing trough 58, smoothly conveying the workpieces to the good product box 51. A guide plate 572 is provided below the connecting plate 570. The guide plate 572 prevents abnormal situations during debugging where workpieces are instantly conveyed below the distributing roller 55 due to excessive rotation speed, making them impossible to remove. The guide plate 572 can guide such workpieces to the defective product channel, thereby avoiding the situation where they cannot be removed.

[0074] Among them, such as Figures 6 to 8 As shown, a first sensor 573 facing the docking point between the platform 50 and the distributing roller 55 and a second sensor 574 facing the distributing groove 58 are respectively installed on the two positioning plates 531. The first sensor 573 is used to detect whether there is a workpiece at the docking point between the distributing roller 55 and the platform 50, and transmits a signal to the second rotary actuator 550 when there is a workpiece, so that the second rotary actuator 550 rotates and conveys the workpiece. The second sensor 574 is used to detect whether there is a workpiece in the distributing groove 58. The first sensor 573 and the second sensor 574 can be proximity sensors or fiber optic sensors, etc.

[0075] In an optional embodiment, the bar length detection diversion device further includes a release mechanism 6, which includes a power component 60 mounted on a mounting plate of the guide rail 21, and an output component 61 mounted on the power component 60. The rear of the placement rail 20 is provided with a vertically extending baffle plate 26, a release plate 28, and a transition plate bent and connected to the release plate 28. The transition plate is located between the release plate 28 and the platform 50. The baffle plate 26 is fixedly disposed above the release plate 28. The release plate 28 is connected to the output component 61. The output component 61 can be raised and lowered under the drive of the power component 60 so that when the workpiece on the placement rail 20 is measured, it rises and drives the release plate 28 to rise synchronously. The workpiece is blocked by the side of the release plate 28. After the workpiece measurement is completed, it is lowered so that the transition plate is engaged with one side of the placement rail, and the workpiece enters the platform 50 from the transition plate.

[0076] Please refer to Figures 2 to 3 The release plate 28 and the transition plate are connected in an L-shape. The release plate 28 is vertically positioned, and the transition plate is located on top of the release plate 28 and horizontally positioned. The release plate 28 can be raised and lowered under the action of the output component 61. When a workpiece needs to be measured, the release plate 28 is raised to block the workpiece, which is then confined to the placement rail 20. After the length of the workpiece is measured, the release plate 28 is lowered under the action of the output component 61 until the transition plate is flush with or slightly lower than the top surface of the placement rail 20. The workpiece is then freed from the obstruction of the release plate 28 and passes through the transition plate into the rear platform 50.

[0077] In one optional embodiment of the power component 60, the power component 60 includes a drive cylinder (pneumatic cylinder, hydraulic cylinder, etc.) and a telescopic rod. The telescopic rod is connected to the output component 61. The telescopic cylinder extends and retracts, thereby driving the release plate 28 to rise and fall. The cylinder body of the drive cylinder is mounted on the side support 62. A shim 63 is provided between the side support 62 and the drive cylinder to adjust the installation distance so that the power component 60 can be firmly mounted on the side support 62.

[0078] In one optional configuration of the storage rail 20, such as Figure 10 As shown, the placement rail 20 can be installed on one side of the hopper box 40. The top part of the placement rail 20, the side closer to the hopper box 40, is higher than the side closer to the release plate 28, so that when the release plate 28 descends, the workpiece enters the transition plate under the guidance of the inclined surface.

[0079] In an optional embodiment, the monitoring mechanism 1 is located above the hopper mechanism 4. The monitoring mechanism 1 also includes a light source assembly 12. The area inside the hopper mechanism 4 used for storing workpieces, the lifting assembly, and the length measuring area are all located within the field of view of the image acquisition device 11 and the illumination range of the light source assembly 12.

[0080] like Figure 9 and Figure 10 As shown, the monitoring mechanism 1 and the light source assembly 12 can be located on the same side of the hopper mechanism 4, and are installed on the hopper support 41 by the horizontally arranged acquisition rods 42 on the hopper support 41. The light source assembly 12 can be a light-emitting component such as an LED light, which provides effective lighting for the area inside the hopper mechanism 4 used for storing workpieces, the lifting assembly and the placement rail 20, and increases the image acquisition clarity of the image acquisition component 11.

[0081] The image acquisition unit 11 is used to monitor whether there are workpieces in each of the above areas, and sends the presence or absence signal of each area and the position information of the workpiece on the secondary lifting assembly 31 to the control mechanism, which then controls the corresponding actuator to complete the corresponding execution action.

[0082] When the secondary lifting assembly 31 has a workpiece but the placement rail 20 does not, a position signal is sent to the lateral movement control assembly of the lifting assembly 310, causing it to move to the center position of the optimal workpiece and lift the selected workpiece onto the placement rail 20. When the secondary lifting assembly 31 has no workpiece, the first lifting assembly 30 is controlled to begin lifting and feeding. When there are no workpieces in all monitoring areas, a signal indicating that all detections have been completed is sent to the control mechanism to inform the operator to replenish workpieces to the hopper mechanism 1 or to terminate the equipment operation. In an optional embodiment, the image acquisition unit 11 is also used to acquire an image of the top surface of the secondary lifting plate, and when there are no workpieces on the top surface of the secondary lifting plate, the controller controls the primary lifting plate 302 to rise to provide workpieces to the secondary lifting plate. When the image acquisition head detects that there is no workpiece on the top surface of the secondary lifting plate, the controller controls the extension rod of the lifting drive cylinder 306 to drive the primary lifting plate 302 to rise. During the rise of the primary lifting plate 302, the workpiece in the hopper mechanism 4 is lifted up. When the primary lifting plate 302 rises to be level with or higher than the top surface of the secondary lifting plate, the workpiece on the primary lifting plate 302 moves to the secondary lifting plate.

[0083] In an optional implementation, when the top surface of the second lifting plate has a workpiece, the image acquisition unit 11 transmits the acquired workpiece position to the controller on the electric actuator 315 in the form of a signal. The controller controls 315 to perform an action, causing the lifting assembly 310 to move laterally to below the workpiece. Subsequently, the lifting assembly 310 drives the cylinder to drive the push rod to lift the workpiece and lift it onto the placement rail 20.

[0084] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0085] The above are merely the principles and preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of this utility model, and these modifications should also be considered within the scope of protection of this utility model.

Claims

1. A bar length detection and diversion device, characterized in that, include: A hopper mechanism for storing workpieces; The length measuring mechanism includes a placement rail, a guide rail, and a first measuring component and a second measuring component that are slidably disposed on the guide rail. The first measuring component is provided with a first measuring head, a first force sensor that senses the pressure on the first measuring head, and a first length measuring instrument that measures the moving distance of the first measuring head. The second measuring component is provided with a second measuring head, a second force sensor that senses the pressure on the second measuring head, and a second length measuring instrument that measures the moving distance of the second measuring head. The placement rail is provided with a length measuring area. The lifting mechanism includes a lifting assembly for lifting a workpiece from the hopper mechanism to the storage rail; The monitoring device includes an image acquisition unit, wherein the image acquisition head of the image acquisition unit faces the placement rail; The control mechanism is communicatively connected to the monitoring mechanism and the length measuring mechanism. When there is no workpiece on the placement rail, it controls the lifting assembly to lift the workpiece onto the placement rail. When there is a workpiece on the placement rail, it controls the first measuring head and the second measuring head to slide laterally opposite each other until the pressure values ​​at both ends of the workpiece are equal to preset values. The length of the workpiece is obtained by using the initial lateral distance between the first measuring head and the second measuring head, the value of the first length measuring instrument, and the value of the second length measuring instrument.

2. The bar length detection and diversion device according to claim 1, characterized in that, The first measuring component is further provided with a first detection sensor that is communicatively connected to the control mechanism, and the second measuring component is further provided with a second detection sensor that is communicatively connected to the control mechanism; When the first detection sensor and the second detection sensor detect a workpiece, the control mechanism transmits deceleration signals to the drive components of the first measuring component and the second measuring component, respectively, to control the first measuring head and the second measuring head to decelerate.

3. The bar length detection and diversion device according to claim 2, characterized in that, The length measuring mechanism is also provided with a positioning component, which includes a base plate mounted on the guide rail and a pressure plate rotatably connected to the base plate. A pressure block is provided on the pressure plate, and the pressure block faces the length measuring area. When the workpiece moves to the length measuring area, the pressure plate rotates until the pressure block presses against the workpiece. After the workpiece length measurement is completed, the pressure plate rotates until the pressure block separates from the workpiece.

4. The bar length detection and diversion device according to claim 3, characterized in that, The positioning component further includes a mounting plate connected to the base plate, and a retractable drive rod is mounted on the mounting plate. When the drive rod extends, it abuts against the pressure plate to drive the pressure plate to rotate and cause the pressure block to disengage from the workpiece. The positioning component also includes an elastic element, the two ends of which are respectively connected between the mounting plate and the pressure plate and are in a stretched state, so that after the drive rod is disengaged from the pressure plate, it drives the pressure block to press against the workpiece.

5. The bar length detection and diversion device according to claim 4, characterized in that, The lifting mechanism includes a primary lifting assembly and a secondary lifting assembly; The first-stage lifting assembly includes a liftable first-stage lifting plate, and the second-stage lifting assembly includes a second-stage lifting plate. The top surface of the first-stage lifting plate is used to lift the workpiece in the hopper mechanism and is inclined toward the second-stage lifting plate. When the top surface of the first-stage lifting plate rises to be level with or higher than the top surface of the second-stage lifting plate, the workpiece on the first-stage lifting plate moves to the second-stage lifting plate.

6. The bar length detection and diversion device according to claim 5, characterized in that, The top of the secondary lifting plate is provided with a storage opening for placing the workpiece. The storage rail is located on the lateral side of the storage opening. A lifting assembly that can move laterally is provided below the secondary lifting plate. When the lifting assembly lifts, it moves the workpiece upward and guides the workpiece to the storage rail through the inclined top surface of the lifting assembly. The inclined surface is inclined toward the storage rail.

7. The bar length detection and diversion device according to claim 6, characterized in that, The lifting assembly includes a sliding rail and a lifting member that is laterally slidably disposed on the sliding rail. The lifting member includes a lifting rod that can be raised and lowered, and the inclined top surface is located on the lifting rod.

8. The bar length detection and diversion device according to claim 4, characterized in that, The bar length detection and diversion device also includes a material distribution mechanism, which includes a platform located behind the loading rail. The platform is rotatable to transport the passing workpieces to the good product box and the defective product box respectively.

9. The bar length detection and diversion device according to claim 8, characterized in that, The bar length detection and diversion device further includes a release mechanism, which includes a power component mounted on a mounting plate of the guide rail, and an output component mounted on the power component; The rear of the loading rail is provided with a vertically extending baffle plate, a release plate, and a transition plate that is bent and connected to the release plate. The transition plate is located between the release plate and the platform. The release plate is connected to the output component, which can be raised and lowered under the drive of the power component. When the workpiece on the placement rail is measured, the release plate is raised synchronously, and the workpiece is blocked by the side of the release plate. After the workpiece is measured, the release plate is lowered so that the transition plate is aligned with one side of the placement rail, and the workpiece enters the platform from the transition plate.

10. The bar length detection and diversion device according to any one of claims 1-9, characterized in that, The monitoring mechanism is located above the hopper mechanism. The monitoring mechanism also includes a light source assembly. The area inside the hopper mechanism used for storing workpieces, the lifting assembly, and the placement rail are all located within the field of view of the image acquisition device and the illumination range of the light source assembly.

Images