Automatic guider assembly line and automatic guider assembly method

Abstract

The invention discloses an automatic guider assembly line and an automatic guider assembly method, and relates to the field of manufacturing of automobile shock absorbers, and the automatic guider assembly line is characterized by comprising a first material machine and a second material machine which are separated from each other, and a butt joint conveying belt for connecting the first material machine and the second material machine. The first material machine is provided with an assembly rotating disc used for sequentially stacking parts such as an oil scraper ring and a valve block to form a small assembly, and a small assembly detection station and a small assembly NG discharging station are arranged before the small assembly is installed into a guider bare part. And the second material machine is used for performing bushing press fitting and final detection on the semi-finished products conveyed from the first material machine. Precise assembly and high-force press-fitting procedures are separated, so that the problem of process interference is effectively solved, and the assembly stability and the product quality are improved; meanwhile, the middle quality doors are arranged on the sub-assembly levels, so that unqualified products can be removed in advance, the cost superposition type waste is fundamentally avoided, and the production efficiency and the economic benefits are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of manufacturing automobile shock absorbers, in particular to an automatic assembly line and method for a guide. BACKGROUND

[0002] As a key precision component in the automobile shock absorption system, the guide usually integrates multiple elements such as oil scraping rings, valve pieces, wave springs, and bushings inside. The assembly precision and cleanliness of these elements directly determine the overall performance and service life of the guide.

[0003] In the existing production technology, there are significant defects in the assembly of such multi-part guides. One common mode is to set a quality inspection link at the final end of the production process. In this mode, a small defect produced in the initial process, such as a missing wave spring or a reversed valve piece, cannot be immediately discovered. This defective semi-finished product continues to circulate in the production line and consumes all subsequent process materials and equipment time, including being assembled into a qualified guide bare piece and then being pressed into a qualified bushing. Only at the last link of production is the product determined to be unqualified at the final inspection. At this time, the loss has evolved from a single part to the total material cost of the entire assembly and the sum of all processing time, forming a cost superimposed waste that leads to serious economic losses and resource waste in large-scale production.

[0004] In addition, the assembly process of the guide itself also contains inherent technical contradictions. Its process flow includes both the gentle and accurate stacking of multiple thin and precise parts such as oil scraping rings and valve pieces, and the need to apply a large and controlled pressure to stably press the bushing into place. In the traditional equipment layout, if these two processes with different natures are integrated on the same equipment or nearby stations, the pressing process will inevitably produce mechanical vibration and impact. This interference will be directly transmitted to the precise stacking station, causing inaccurate positioning and misplacement of the parts, seriously affecting the success rate and stability of the front-end assembly. SUMMARY

[0005] The purpose of the present application is to provide an automatic guide assembly line that can effectively isolate process interference and achieve process quality control to avoid cost waste, improve the stability, qualification rate, and economic benefits of automatic guide production.

[0006] The above technical purpose of the present application is achieved by the following technical scheme: An automatic guide assembly line, comprising: A first material machine, comprising: An assembly turntable; A plurality of workstations arranged along the circumference of the assembly turntable in sequence, each workstation is provided with a tooling, the plurality of workstations comprises: A scraper ring loading station, a first valve plate loading station, a wave spring loading station, and a second valve plate loading station, for sequentially stacking the scraper ring, the first valve plate, the wave spring, and the second valve plate onto the tooling to form a subassembly; And sequentially located on the rear side of the second valve plate loading station: A subassembly detection station for detecting the assembly quality of the subassembly; A subassembly NG unloading station for removing unqualified subassemblies according to the detection results; A subassembly material moving station for moving and loading the qualified subassembly from the workstation into a guide bare piece; A second material machine; And a docking conveying belt connected between the first material machine and the second material machine, for conveying the guide bare piece loaded with the subassembly from the first material machine to the second material machine; Wherein, the second material machine comprises, arranged in sequence according to the material flow path: A subassembly re-inspection station for re-inspecting the assembly quality of the subassembly; A press-fitting station for pressing the bushing into the guide bare piece loaded with the subassembly; A detection station for detecting the guide; And an NG unloading station and an OK unloading station for sorting the guide into qualified products and unqualified products according to the detection results of the foregoing detection station.

[0007] Further provided: the detection station comprises, sequentially located on the rear side of the press-fitting station: A cleaning and dust removal station for cleaning the guide after press-fitting; An inner hole gauge detection station for detecting the inner hole size of the cleaned guide; An inner hole pass-stop gauge detection station for pass-stop detection of the inner hole of the guide.

[0008] Further provided: the scraper ring loading station, the first valve plate loading station, the second valve plate loading station, and the press-fitting station each comprise a vibration disc for automatically supplying corresponding parts.

[0009] Further provided: the scraper ring loading station, the first valve plate loading station, the second valve plate loading station, the subassembly NG unloading station, and the subassembly material moving station are respectively provided with a three-axis linear module and a gripper driven thereby.

[0010] Further arrangement: the subassembly reinspection station, the press-fitting station, the cleaning and dust removing station, the inner hole gauge detection station and the inner hole pass / fail gauge detection station are arranged in a straight line; the second material machine is further provided with a three-axis servo platform and a plurality of material moving claws driven by the three-axis servo platform, and the three-axis servo platform is suitable for driving any material moving claw to reciprocate between adjacent stations.

[0011] Further arrangement: the wave spring feeding mechanism comprises: a feeding turntable, a material rod located on the feeding turntable, and a wave spring located on the material rod; a lifting mechanism for lifting the wave spring on the material rod upward; the lifting mechanism has a preset material taking height and a detection height in a stroke range thereof; a detection inductor for detecting whether the uppermost wave spring reaches the preset detection height; a controller in electrical signal connection with the lifting mechanism, the controller being configured to: when the detection inductor detects that the uppermost wave spring reaches the detection height, control the lifting mechanism to continue to rise by a preset compensation stroke, so that the wave spring reaches the material taking height.

[0012] Further arrangement: the controller is further configured to: after the uppermost wave spring is grabbed, control the lifting mechanism to descend by a preset stroke, and perform the detection and compensation actions again, so as to position the next layer of wave springs to the material taking height.

[0013] Further arrangement: the lifting mechanism is a servo lifting mechanism, and the servo lifting mechanism has a preset zero position in the stroke range thereof; the controller is further configured to: after the wave springs on one material rod are all taken, control the servo lifting mechanism to return to the zero position for reference calibration.

[0014] Another object of the present application is to provide a guide automatic assembly method, comprising the following steps: S1: performing a subassembly assembly and pre-detection step on a first material machine; S11: sequentially stacking an oil scraping ring, a first valve plate, a wave spring and a second valve plate on a tooling of an assembly turntable through an oil scraping ring feeding station, a first valve plate feeding station, a wave spring feeding station and a second valve plate feeding station, to form a subassembly; S12: detecting the assembly quality of the subassembly through a subassembly detection station; S13: rejecting the subassembly detected as unqualified; S14: moving and loading the subassembly detected as qualified from the tooling into a guide bare piece; S2: performing a conveying step; S21: conveying the guide bare piece having the subassembly loaded therein from the first material machine to a second material machine through a butt joint conveying belt. S3: performing a press-fitting and final detection step on the second material machine, and the step specifically comprises: S31: re-inspecting the guide bare piece with the small component re-inspection station after the small component is loaded into the guide bare piece; S32: after the re-inspection is passed, pressing the bushing into the guide bare piece through the press-fitting station; S33: performing a final detection on the guide after the press-fitting is completed; S34: according to the detection result of step S33, sorting the guide into a qualified product and an unqualified product through the NG unloading station and the OK unloading station.

[0015] Further settings: in S33, the final detection comprises: S331: performing a cleaning and dust removal treatment on the guide; S332: detecting the inner hole size of the guide by using an inner hole gauge; S333: performing a pass-fail detection on the inner hole of the guide by using an inner hole pass-fail gauge.

[0016] In summary, the present application has the following beneficial effects: First, in the present application, the whole assembly line is designed as the first material machine and the second material machine which are separated from each other and connected by the docking conveying belt, and the present application fundamentally solves the technical conflict between the precise assembly and the high-force press-fitting. Through the physical separation, an independent and optimized working environment is created for the two processes. The first material machine can focus on the interference-free and high-precision stacking of small parts, and the second material machine can be designed to be strong enough to withstand the impact caused by the press-fitting. This modular design ensures that both processes can run in the most stable state, thereby significantly improving the assembly qualification rate of the small component and the overall quality consistency of the final product.

[0017] Second, in the present application, the small component detection station and the small component NG unloading station are arranged in the first material machine, which solves the cost-additive waste problem caused by the end-of-line inspection. Any small defect generated in the early process will continuously accumulate value in the subsequent process, and once it is finally detected as unqualified, the entire material cost and processing time of the product will be wasted. Through this intermediate detection link, unqualified sub-components can be removed in advance at a very low cost, thereby fundamentally eliminating the invalid material consumption and time waste, and greatly improving the economic benefit and resource utilization of production.

[0018] Third, in the present application, all unqualified products are automatically removed before the subassembly leaves the first feeder. The design ensures that each semi-finished product delivered to the second feeder meets the preset quality standards before entering the next stage. Under the premise that the first feeder has already detected and screened the subassembly, a subassembly re-inspection station is set at the entrance of the second feeder. This seems redundant, but it actually solves a key but often overlooked technical problem in the automated assembly line: the risk of transfer between processes. During the transfer process of the first feeder and the second feeder through the docking conveyor belt, dynamic factors such as vibration and start-stop may cause the subassembly, which has been placed in the guide bare but has not been fixed by the press-fit, to shift slightly, tilt, or even have parts fall off. If this change is not detected, it will directly enter the press-fit station, which may cause internal quality problems in the final product that are difficult to detect, or may damage the press-fit mold, bushing, or guide bare due to inaccurate positioning, causing expensive equipment damage and production interruptions. Therefore, this re-inspection station serves as a handover verification, ensuring that the semi-finished product remains in good condition after physical transfer. It provides a second layer of protection for the final product quality and actively protects the subsequent high-cost and high-risk press-fit process, significantly improving the stability and reliability of the entire production line.

[0019] Fourth, in the present application, a separate cleaning station is set before the detection step of the terminal, creating a highly reliable detection environment and fundamentally ensuring the accuracy of subsequent detection results. The press-fit process itself may generate or introduce small metal chips, oil stains, or dust into the guide hole. These contaminants can directly affect the measurement results of high-precision gauges. For example, a small particle may cause the reading of the inner hole gauge to be out of tolerance, or hinder the smooth passage of the go gauge, thereby misjudging the qualified product as unqualified. Through the pre-positioned cleaning process, this key interference variable is actively excluded, reducing the misjudgment rate and avoiding waste of qualified products.

[0020] Fifth, the wave spring, a flexible, thin-walled, and dimensionally small-tolerance workpiece, has a separate feeding mechanism. First, the mechanism uses a vertical feeding method with a feeding rod and overall lifting, which fundamentally avoids the damage to the wave spring caused by the traditional vibrating disc feeding method. The wave spring is prone to entanglement, deformation, or even damage when it rolls and collides violently in the vibrating disc due to its thin wall and elastic structure, resulting in feeding failure. This solution neatly fits the wave spring on the feeding rod and transports it through smooth vertical lifting, ensuring that each spring maintains its physical form when it reaches the picking position, providing high-quality incoming material for subsequent precise grabbing and assembly.

[0021] Secondly, the core of the solution lies in its closed-loop positioning control logic of detection and compensation. This logic solves the problem of inaccurate material handling height and the tendency for adjacent springs to partially overlap due to the cumulative thickness tolerance of individual springs. In automated gripping, the robotic arm needs to pick up materials at an absolutely precise and constant height. However, because the actual thickness of each wave spring has slight manufacturing tolerances, the total height of a stack of springs is a variable, making it impossible to accurately position the top layer using a simple open-loop, fixed-stroke lifting motion with a stepper motor. The principle of this solution is that it doesn't directly position the material handling height. Instead, it first raises the springs to a fixed detection height, triggering a signal from the detection sensor. Then, the controller instructs the lifting mechanism to precisely continue rising a preset, fixed compensation stroke. In this way, regardless of the cumulative height of the lower springs, the final material handling surface of the top spring is always precisely positioned at the same absolute height, achieving extremely high positioning accuracy and repeatability. The subsequent cyclic control of gripping, lowering, and repositioning extends this high-precision positioning capability to every spring on the material bar and makes it less likely for adjacent springs to overlap.

[0022] Finally, by employing a servo lifting mechanism and adding a zero-calibration control program, the solution ensures the long-term stability and reliability of the mechanism. Any mechanical system may accumulate minor errors due to wear, temperature drift, and other factors after prolonged operation. Ordinary lifting mechanisms may gradually deviate from their initial accuracy reference. This solution, by forcing the servo mechanism to return to a fixed physical zero position for reference calibration after each material bar is empty, can proactively and periodically eliminate any potential system accumulation errors. This self-calibration mechanism ensures that the coordinate system upon which the aforementioned detection and compensation rely remains accurate, thereby ensuring that the equipment maintains its initial high-precision positioning capability throughout its entire lifespan, eliminating the need for frequent manual intervention and calibration, and greatly improving the equipment's stability and maintenance-free operation. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an automated guide assembly line; Figure 2 This is a structural diagram of the assembly turntable; Figure 3 This is a schematic diagram of the oil scraper ring feeding mechanism; Figure 4 This is a schematic diagram of the structure of the first valve plate feeding mechanism; Figure 5 This is a schematic diagram of the second valve plate feeding mechanism; Figure 6 This is a schematic diagram of the small component transfer mechanism; Figure 7 This is a schematic diagram of the pressing mechanism; Figure 8 This is a schematic diagram of the wave spring feeding mechanism.

[0024] In the diagram, 100 is the first feeder; 110 is the guide bare part feeding conveyor belt. 200. Second material feeder; 201. Small component re-inspection station; 202. Pressing station; 203. Cleaning and dust removal station; 204. Internal bore gauge inspection station; 205. Internal bore go / no-go gauge inspection station; 206. NG unloading station; 207. OK unloading station; 210. Vibratory feeder; 220. Three-axis servo platform; 230. Transfer gripper; 240. Sensor; 241. Pressure bar; 242. Pressing mechanism; 300. Assembly turntable; 310. Docking conveyor belt; 320. Tooling; 301. Oil scraper ring loading station; 302. First valve plate loading station; 303. Wave spring loading station; 304. Second valve plate loading station; 305. Small component inspection station; 306. Small component NG unloading station; 307. Small component transfer station; 401. Three-axis linear module; 402. Gripper; 400. Oil scraper ring feeding mechanism; 500. First valve plate feeding mechanism; 600. Wave spring feeding mechanism; 700. Second valve plate feeding mechanism; 800. Small component NG unloading mechanism; 900. Small component transfer mechanism; 601. Feeding turntable; 602. Feeding rod; 603. Drive unit; 604. Pallet; 605. Lifting mechanism; 606. Detection sensor; 607. Support component. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] like Figure 1 and Figure 2As shown, this embodiment of the invention provides an automatic assembly line for guides, which includes a first material feeder 100 and a second material feeder 200. A docking conveyor belt 310 is provided between the first material feeder 100 and the second material feeder 200 to transport the semi-finished products pre-assembled by the first material feeder 100 to the second material feeder 200 for subsequent processing.

[0028] Specifically, the core component inside the first material handling machine 100 is an assembly turntable 300, which is automatically selected and driven by a servo motor. On the circumference of the assembly turntable 300, along the rotation direction of the turntable, multiple stations with different functions are sequentially arranged, and each station is equipped with a fixture 320 for carrying and positioning parts. These stations include multiple loading stations for forming small components, specifically an oil scraper ring loading station 301, a first valve plate loading station 302, a wave spring loading station 303, and a second valve plate loading station 304. During equipment operation, these loading stations work together to sequentially stack the oil scraper ring, the first valve plate, the wave spring, and the second valve plate into the fixture 320 on the turntable station, thereby forming a pre-assembled small component.

[0029] Downstream of the loading station, along the rotation path of the turntable, there are sequentially arranged a small component inspection station 305, a small component NG unloading station 306, and a small component transfer station 307. The small component inspection station 305 is used to inspect the quality of small components assembled in the preceding station. The small component NG unloading station 306 automatically removes unqualified small components from the tooling 320 based on the inspection results from the inspection station. The small component transfer station 307 is responsible for picking up qualified small components from the tooling 320 and transferring them into a guide component supplied to another station. Thus, the first material handling machine 100 completes the pre-assembly operation of a semi-finished product.

[0030] The docking conveyor belt 310 transports the pre-assembled guide components from the first feeder 100 to the second feeder 200. The second feeder 200 also contains multiple stations arranged sequentially according to the material flow path. First, there is a component re-inspection station 201, used to re-inspect the incoming semi-finished product and its internal components before entering the high-value processing stage. After passing the re-inspection, the semi-finished product is sent to the pressing station 202, where a bushing is pressed into the guide component already equipped with its components. After pressing, the guide is sent to a comprehensive inspection station for a full quality inspection of the finished guide. Finally, after all inspections are completed, there are NG unloading stations 206 and OK unloading stations 207, used to automatically sort the finished guides into qualified and unqualified products based on the final inspection results from the aforementioned inspection stations.

[0031] In one specific embodiment, the aforementioned comprehensive inspection station for conducting full quality inspection of the finished product guide includes a cleaning and dust removal station 203, an internal bore gauge inspection station 204, and an internal bore go / no-go gauge inspection station 205, which are arranged sequentially along the material conveying path.

[0032] The cleaning and dust removal station 203 follows immediately after the pressing station 202. Its function is to actively clean and remove dust from the guide that has just been pressed, in order to remove tiny debris or contaminants that may be generated during the pressing process, thereby providing a clean measurement environment for subsequent high-precision testing and ensuring the accuracy of the test results.

[0033] After cleaning, the guide is sent to the internal bore gauge inspection station 204. This station is used to perform precise and quantitative data measurement of the key dimensions of the guide's internal bore using a high-precision pneumatic gauge.

[0034] After dimensional measurements are completed, the guide is finally sent to the internal bore go / no-go gauge inspection station 205. At this station, the guide's internal bore is functionally verified using standard go and no-go gauges to ensure that its geometry and shape meet the final assembly requirements. This sequential cleaning, precision measurement, and functional verification together constitute a complete and reliable finished product quality inspection process.

[0035] like Figure 1 and Figure 2 As shown, in a specific implementation of the present invention, in order to achieve automated material feeding at each workstation, some workstations are equipped with vibratory feeders 210. Specifically, the oil scraper ring feeding station 301, the first valve plate feeding station 302, the second valve plate feeding station 304 on the first feeder 100, and the pressing station 202 on the second feeder 200 all include a vibratory feeder 210 for automatically supplying the corresponding parts. These vibratory feeders 210 can automatically and directionally transport disordered oil scraper rings, valve plates, or bushings and other parts to a preset picking position for subsequent gripping.

[0036] like Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, in order to perform precise material grabbing and placement actions between various workstations, both the first material feeder 100 and the second material feeder 200 of the present invention are equipped with high-precision actuators.

[0037] Taking the first material feeder 100 as an example, its multiple stations are equipped with independent mechanisms for performing specific operations. Specifically, the oil scraper ring feeding station 301 is equipped with an oil scraper ring feeding mechanism 400; the first valve plate feeding station 302 and the second valve plate feeding station 304 are respectively equipped with a first valve plate feeding mechanism 500 and a second valve plate feeding mechanism 700; the small component NG unloading station 306 is equipped with a small component NG unloading mechanism 800; and the small component transfer station 307 is equipped with a small component transfer mechanism 900.

[0038] In this embodiment, all the mechanisms except the wave spring feeding mechanism 600 adopt similar structures. Specifically, each mechanism is provided with a triaxial linear module 401, and each triaxial linear module 401 is equipped with a gripper 402 that it drives. The triaxial linear module 401 can be programmed and positioned with high precision in three-dimensional space, thereby driving the gripper 402 to stably complete a series of complex actions such as gripping, placing, transferring or rejecting the corresponding parts, ensuring the accuracy and reliability of the stacking and transfer process.

[0039] like Figure 1 , Figure 2 As shown, the internal workstations of the second material feeder 200 have been optimized in terms of spatial layout. Specifically, the small component re-inspection station 201, pressing station 202, cleaning and dust removal station 203, internal bore gauge inspection station 204, and internal bore go / no-go gauge inspection station 205 are arranged along a straight line. This layout facilitates the sequential flow of materials and cycle control. To efficiently transfer the guide between the linearly arranged workstations, the second material feeder 200 is also equipped with a three-axis servo platform 220, on which multiple transfer claws 230 are mounted. The three-axis servo platform 220 can drive any one of its transfer claws 230 to reciprocate between two adjacent workstations, thereby realizing the step-by-step transfer of the guide between various processing and inspection processes within the second material feeder 200.

[0040] like Figure 7 As shown, a pressing mechanism is provided on the pressing station 202 of the second material feeder 200. The pressing mechanism is used to perform the action of pressing the bushing into the guide bare part. The specific structure of the pressing mechanism is not limited. In this embodiment, as an example, the pressing mechanism may include a pressing rod 241 that can move up and down and a pressing mechanism 242 for driving the pressing rod 241 to press down.

[0041] In addition, to ensure accurate positioning of materials at each workstation and error-free handover between workstations, sensors 240 can be installed at multiple workstations. For example... Figures 2 to 7As shown, in this embodiment, each station on the first material feeder 100 and the second material feeder 200, such as the loading station, the detection station, and the material transfer station, is equipped with a sensor 240. These sensors 240 are used to detect the presence or absence of materials at the station or to detect their location, thereby ensuring the accurate and reliable operation of the entire automated process.

[0042] like Figure 8 As shown, considering that wave springs are easy to wind, easy to deform, and have tolerances in individual thickness, in order to achieve stable and reliable automated feeding, the wave spring feeding station 303 of this invention adopts a specially designed wave spring feeding mechanism 600.

[0043] The wave spring feeding mechanism 600 includes a feeding turntable 601 and a drive device 603, which is a servo motor. The mechanism also includes multiple vertically mounted feed rods 602 on the turntable, each with a sliding support 607 at its bottom. Wave springs to be fed are neatly fitted onto these feed rods 602. The mechanism further includes a lifting mechanism 605 and a tray 604 driven by the lifting mechanism 605, which acts on the bottom of the support 607. In this embodiment, the lifting mechanism 605 is preferably a servo lifting mechanism 605 capable of precise position control, used to drive the feed rods 602 and the stack of wave springs on them to vertically lift and lower.

[0044] The wave spring feeding mechanism 600 also includes a detection sensor 606 and a controller, used to detect whether the uppermost wave spring has reached a preset detection height. The controller is electrically connected to the lifting mechanism 605.

[0045] The mechanism employs a closed-loop, compensated positioning control method. Specifically, a fixed detection height and a final material-picking height are pre-set along the travel path of the lifting mechanism 605. When the controller drives the lifting mechanism 605 to raise the material rod 602, a detection sensor 606 located at the detection height will detect the position of the uppermost wave spring in real time. Once the detection sensor 606 detects that the uppermost wave spring has reached the detection height, the controller will not stop lifting but will continue to instruct the lifting mechanism 605 to rise by a preset, precise compensation stroke, thereby ensuring that the top surface of the uppermost wave spring can be accurately positioned at the material-picking height for the loading robot to grasp.

[0046] To achieve continuous feeding, the controller is also configured to perform cyclic positioning. After a wave spring is successfully grabbed, the controller instructs the lifting mechanism 605 to descend by a preset stroke, and then restarts the sequence of rising, detecting, and compensating actions to accurately position the next layer of wave springs to the picking height and avoid overlap between adjacent wave springs.

[0047] Furthermore, to ensure the mechanism maintains its high positioning accuracy over a long period, the servo lifting mechanism 605 also has a preset zero position. The controller is configured to automatically control the servo lifting mechanism 605 to return to the zero position for a reference calibration after all the wave springs on a feed bar 602 have been removed. This periodic self-calibration mechanism can proactively eliminate any accumulated errors that may occur due to long-term operation, ensuring the long-term stability and reliability of the equipment.

[0048] In this embodiment, the automatic guide assembly line also includes a guide bare component loading conveyor belt 110. The guide bare component loading conveyor belt 110 is arranged on one side of the assembly turntable 300 of the first material feeder 100, with its end near the small component transfer station 307. It is specifically responsible for continuously transporting the guide bare components to be assembled from the outside to the predetermined pick-up position of the first material feeder 100. The docking conveyor belt 310 serves as a transfer mechanism connecting the first material feeder 100 and the second material feeder 200, responsible for transporting the pre-assembled semi-finished products from the first material feeder 100 to the second material feeder 200.

[0049] In the automated production process, once a qualified small component is ready on the assembly turntable 300, the small component transfer mechanism 900 located at the small component transfer station 307 performs a pre-assembly action. This action includes: first, taking an incoming guide component from the end of the guide component loading conveyor 110; then, precisely inserting the qualified small component from the turntable fixture 320 into the guide component that was just taken out.

[0050] After the above pre-assembly is completed, a semi-finished product is formed and fed from the working area of ​​the first material machine 100 onto the docking conveyor belt 310. The docking conveyor belt 310 then transports it to the second material machine 200 for further processing.

[0051] The specific application scenarios and methods of the automatic guide assembly line in the above embodiments are not specifically limited. This embodiment also provides an automatic guide assembly method, characterized by including the following steps: S1: Perform small component assembly and pre-inspection steps on the first material feeder 100; S11: By using the scraper ring loading station 301, the first valve plate loading station 302, the wave spring loading station 303, and the second valve plate loading station 304, the scraper ring, the first valve plate, the wave spring, and the second valve plate are sequentially stacked onto the tooling 320 of an assembly turntable 300 to form a small component. S12: The assembly turntable 300 rotates to the small component inspection station 305 to inspect the quality of the newly assembled small component; S13: Based on the test results, discard any small components that fail the test. S14: The qualified small components are transferred from the tooling 320 by the small component transfer station 307 and installed into a guide bare part, completing all the assembly processes on the first material machine 100.

[0052] S2: Perform the conveying step; S21: The bare guide piece, into which the small components have been loaded in step S14, is transported from the first feeder 100 to the second feeder 200 via the docking conveyor belt 310.

[0053] S3: After the semi-finished product arrives at the second material feeder 200, the pressing and final inspection steps begin. The specific steps include: S31: The bare guide component with the small components installed is re-inspected through the small component re-inspection station 201; S32: After passing the re-inspection, the bushing is pressed into the bare guide piece by the pressing station 202; S33: After pressing is completed, the guide enters a comprehensive final inspection process; S34: Finally, based on the final inspection results, the finished product guides are automatically sorted into qualified and unqualified products through the NG unloading station 206 and the OK unloading station 207, thus completing the entire automated assembly process.

[0054] Specifically, in S33, the final inspection is a multi-stage precision inspection process, which includes the following steps: S331: Clean and remove dust from the guide to ensure the surface being measured is clean and to eliminate measurement interference; S332: The inner diameter of the guide is precisely measured using an internal bore gauge; S333: Use an internal go / no-go gauge to perform functional go / no-go testing on the inner hole of the guide to ensure that it meets assembly requirements.

[0055] The above embodiments are merely explanations of the present invention and are not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An automated assembly line for guides, characterized in that, include: The first feeder (100) includes: Assembly turntable (300); Multiple workstations are arranged sequentially along the circumference of the assembly turntable (300), each workstation having a fixture (320). The multiple workstations include: oil scraper ring loading workstation (301), first valve plate loading workstation (302), wave spring loading workstation (303), and second valve plate loading workstation (304), which are used to stack the oil scraper ring, first valve plate, wave spring, and second valve plate sequentially onto the fixture (320) to form a small component; And located sequentially behind the second valve plate loading station (304): The small component inspection station (305) is used to inspect the assembly quality of small components; The small component NG unloading station (306) is used to reject unqualified small components based on the inspection results; Small component transfer station (307) is used to transfer qualified small components from the station and load them onto a guide bare part; Second feeder (200); And a docking conveyor belt (310) connected between the first feeder (100) and the second feeder (200) for conveying the bare guide parts with small components loaded from the first feeder (100) to the second feeder (200); The second feeder (200) includes components arranged sequentially according to the material flow path: The small component re-inspection station (201) is used to re-inspect the assembly quality of small components; Press-fit station (202) is used to press the bushing into the bare guide piece that already has small components installed; The inspection station inspects the pressed-fit guides. And an NG unloading station (206) and an OK unloading station (207) for sorting the guides into qualified and unqualified products based on the inspection results of the aforementioned inspection station.

2. The automatic assembly line for guides according to claim 1, characterized in that: The testing stations include those located sequentially behind the pressing station (202): The cleaning and dust removal station (203) is used to clean the guide after the press-fitting is completed; The internal bore gauge inspection station (204) is used to inspect the internal bore dimensions of the cleaned guide. The inner hole go / no-go gauge inspection station (205) is used to inspect the inner hole of the guide for go / no-go checks.

3. The automatic assembly line for guides according to claim 1, characterized in that: The oil scraper ring feeding station (301), the first valve plate feeding station (302), the second valve plate feeding station (304), and the press-fitting station (202) all include a vibratory feeder (210) for automatically supplying the corresponding parts.

4. The automatic assembly line for guides according to claim 1, characterized in that: The oil scraper ring loading station (301), the first valve plate loading station (302), the second valve plate loading station (304), the small component NG unloading station (306), and the small component transfer station (307) are respectively equipped with a triaxial linear module (401) and a gripper (402) driven by it.

5. The automatic assembly line for guides according to claim 2, characterized in that: The small component re-inspection station (201), pressing station (202), cleaning and dust removal station (203), internal hole measuring instrument inspection station (204), and internal hole go / no-go gauge inspection station (205) are arranged in a straight line; the second material machine (200) is also equipped with a three-axis servo platform (220) and multiple material transfer claws (230) driven by the three-axis servo platform (220). The three-axis servo platform (220) is suitable for driving any material transfer claw (230) to reciprocate between adjacent stations.

6. The automatic assembly line for guides according to any one of claims 1-5, characterized in that: The wave spring feeding station (303) is equipped with a wave spring feeding mechanism (600), including: A feeding turntable (601), a feeding rod (602) located on the feeding turntable (601), and a wave spring located on the feeding rod (602); The lifting mechanism (605) is used to lift the wave spring on the material rod (602) upward; the lifting mechanism (605) has a preset material picking height and detection height within its stroke range; A detection sensor (606) is used to detect whether the uppermost wave spring has reached a preset detection height; The controller is electrically connected to the lifting mechanism (605), and the controller is configured as follows: When the detection sensor (606) detects that the uppermost wave spring has reached the detection height, the control lifting mechanism (605) continues to rise by a preset compensation stroke so that the wave spring reaches the material picking height.

7. The automatic assembly line for guides according to claim 6, characterized in that: The controller is also configured to: after the uppermost wave spring is grasped, control the lifting mechanism (605) to descend a preset stroke and perform detection and compensation actions again so as to position the next wave spring at the material picking height.

8. The automatic assembly line for guides according to claim 7, characterized in that: The lifting mechanism (605) is a servo lifting mechanism (605), and it also has a preset zero position within its stroke range; the controller is also configured to: after all the wave springs on a material bar (602) are removed, control the servo lifting mechanism (605) to return to the zero position for reference calibration.

9. An automatic assembly method for a guide, characterized in that, Includes the following steps: S1: Perform the component assembly and pre-inspection steps on the first material feeder (100); S11: By using the scraper ring loading station (301), the first valve plate loading station (302), the wave spring loading station (303), and the second valve plate loading station (304), the scraper ring, the first valve plate, the wave spring, and the second valve plate are sequentially stacked onto the tooling (320) of an assembly turntable (300) to form a small component; S12: Inspect the assembly quality of small components through the small component inspection station (305); S13: Remove small components that are detected as non-compliant; S14: Transfer the qualified small component from the tooling (320) and install it onto a guide bare part; S2: Perform the conveying step; S21: The bare guide piece with small components loaded in step S14 is transported from the first feeder (100) to the second feeder (200) via the docking conveyor belt (310); S3: Perform the pressing and final inspection steps on the second material feeder (200). The specific steps include: S31: Re-inspect the bare guide parts with the small components installed through the small component re-inspection station (201); S32: After passing the re-inspection, the bushing is pressed into the bare guide piece through the pressing station (202); S33: The final inspection of the press-fitted guide is carried out through the inspection station; S34: Using the NG unloading station (206) and OK unloading station (207), the guides are sorted into qualified and unqualified products according to the detection results of step S33.

10. The automatic assembly method for the guide according to claim 9, characterized in that: In S33, the final detection includes: S331: Clean and remove dust from the guide; S332: Use an internal bore gauge to measure the inner bore dimension of the guide; S333: Use an internal hole go / no-go gauge to check the go / no-go status of the guide's internal hole.

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