Online automatic detection device for valve guide installation

Abstract

This utility model discloses an online automatic detection device for valve guide installation, installed at the detection station of the workpiece conveyor line. It includes a limit guide wheel assembly, a misinstallation detection plate, and a missing valve sensor. When a workpiece arrives at the detection station, it follows a set trajectory through the misinstallation detection plate under the limiting and guiding action of the limit guide wheel assembly. If all valve guides are correctly installed, the workpiece can pass through the misinstallation detection plate; however, if any valve guide is not pressed to the correct depth or is installed backwards, it will be blocked by the misinstallation detection plate. Products that pass the misinstallation detection plate inspection continue to be conveyed downstream. The missing valve sensor detects each valve guide on the workpiece, and if a missing valve is found, an alarm signal is sent. This utility model can effectively determine the correctness of cylinder head valve guide installation, preventing defective products from entering subsequent processes and avoiding corresponding losses.

Description

Technical Field

[0001] This utility model relates to the field of engine assembly technology, specifically to an online automatic detection device for valve guide installation. Background Technology

[0002] After assembly, the valve guide needs to be precision machined simultaneously with the valve seat to ensure the positional tolerance requirements between the valve seat sealing cone and the valve guide inner hole. If the valve guide is misinstalled (incorrect press-fit depth, incorrect installation direction) or missing (one or more holes missing), rework will be required, resulting in wasted time and the valve seat and valve guide themselves being scrapped, causing losses. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an online automatic detection device for valve guide installation that can effectively determine the correctness of cylinder head valve guide installation and prevent unqualified products from being transferred to subsequent processes.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] An online automatic inspection device for valve guide installation is installed at the inspection station of the workpiece conveyor line, including:

[0006] Limiting guide wheel sets are installed on both sides of the workpiece conveyor line for accurate positioning and guidance during the workpiece's movement.

[0007] A misassembly detection plate is installed above the workpiece's running trajectory. The misassembly detection plate has a judgment groove that is adapted to the positive end size of the valve guide.

[0008] The missing sensor is installed above the workpiece's running trajectory, and the number of missing sensors corresponds to the valve guide holes on the workpiece.

[0009] As a preferred technical solution, the limiting guide wheel assembly includes a plurality of rollers arranged along the workpiece conveying direction.

[0010] As a preferred technical solution, mounting plates are respectively provided on both sides of the workpiece conveyor line, and the rollers are mounted on the mounting plates.

[0011] As a preferred technical solution, a support frame is provided at the inspection station of the workpiece conveyor line, and an inspection plate adjustment seat is installed on the support frame, with the mis-installed inspection plate installed on the inspection plate adjustment seat.

[0012] As a preferred technical solution, a sensor adjustment frame is installed on the support frame, and the missing sensor is installed on the sensor adjustment frame.

[0013] As a preferred technical solution, an alarm indicator light is installed on the support frame.

[0014] As a preferred technical solution, the missing sensor is disposed downstream of the mis-installation detection plate.

[0015] Due to the adoption of the above technical solution, this utility model has at least the following beneficial effects: When the workpiece arrives at the detection station of the workpiece conveyor line, under the limiting and guiding action of the limiting guide wheel group, it passes through the misinstallation detection plate according to the set running trajectory. When the valve guide is installed correctly (the guide pressing depth is in place, and the guide installation direction is correct), the positive end of the valve guide can pass through the judgment groove. However, when the valve guide is installed incorrectly (the guide pressing depth is not in place, or the guide is installed backwards), the valve guide cannot pass through the judgment groove and is blocked by the misinstallation detection plate. Products that pass the installation height and forward / backward detection by the misinstallation detection plate continue to be conveyed downstream. The missing valve guide on the workpiece is detected by the missing sensor. If a missing valve is found, a signal is sent to alarm, prompting manual intervention. In this way, the correctness of the cylinder head valve guide installation can be effectively determined, preventing unqualified products from being transferred to subsequent processes and avoiding corresponding losses. Attached Figure Description

[0016] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0017] Figure 1 This is a schematic diagram of the main structure of an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the left-side structure of an embodiment of this utility model;

[0019] Figure 3 This is a top view of an embodiment of the present invention.

[0020] Figure 4 This is a reference image of the main view during online detection;

[0021] Figure 5 This is a reference image showing the left-viewing state during online detection;

[0022] Figure 6 This is a schematic diagram of the misinstallation detection plate in an embodiment of this utility model.

[0023] In the diagram: 1-Workpiece conveyor line; 2-Limit guide wheel assembly; 3-Misfit detection plate; 31-Plate body; 32-Judgment groove; 33-Adjustment hole; 4-Missing sensor; 5-Mounting plate; 6-Valve guide; 7-Detection plate adjustment seat; 8-Adjusting screw; 9-Alarm indicator light; 10-Sensor adjustment bracket; 11-Workpiece; 12-Support frame. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0025] like Figures 1 to 3 As shown, an online automatic detection device for valve guides is installed at the detection station of workpiece conveyor line 1, including a limit guide wheel group 2, a misinstallation detection plate 3, and a missing sensor 4; in this embodiment, workpiece conveyor line 1 is a roller conveyor line.

[0026] refer to Figure 3 and Figure 4 The limiting guide wheel group 2 is provided in two sets and is installed on both sides of the workpiece conveying line 1. The limiting guide wheel group 2 includes several rollers arranged along the workpiece conveying direction, which can be used for accurate positioning and guidance of the workpiece 11 (cylinder head) during its movement. In this embodiment, mounting plates 5 are respectively provided on both sides of the workpiece conveying line 1, and the rollers are mounted on the mounting plates 5.

[0027] The misassembly detection plate 3 is installed above the workpiece's running trajectory. (Reference) Figure 6 The misinstallation detection plate 3 includes a plate body 31, on which an oblong adjustment hole 33 and a judgment groove 32 adapted to the positive end size of the valve guide 6 are provided. In this embodiment, a support frame 12 is provided at the detection station of the workpiece conveyor line 1, and a detection plate adjustment seat 7 is installed on the support frame 12. The misinstallation detection plate 3 is installed on the detection plate adjustment seat 7 by adjusting screws 8. An alarm indicator light 9 is installed on the support frame 12. After the misinstallation detection plate 3 is installed and adjusted, when the valve guide 6 is installed correctly (the guide pressing depth is in place and the guide installation direction is correct), the positive end of the valve guide 6 (the diameter of the positive end is smaller than the diameter of the negative end) can pass through the judgment groove 32. However, when the valve guide 6 is installed incorrectly (the guide pressing depth is not in place or it is installed backwards), the valve guide 6 is blocked by the misinstallation detection plate 3 due to the mismatch in height or diameter and cannot pass through the judgment groove 32. At this time, a signal is sent through the induction switch to activate the alarm indicator light, prompting manual intervention.

[0028] The missing sensor 4 is installed above the workpiece's running trajectory and downstream of the misinstallation detection plate 3. The missing sensor 4 is an inductive proximity switch, and its number and position correspond to the valve guide holes on the workpiece. In this embodiment, a sensor adjustment frame 10 is installed on the support frame 12, and the missing sensor 4 is installed on the sensor adjustment frame 10. The sensor adjustment frame 10 has adjustment holes, and during installation, the four proximity switches can be adjusted in multiple directions to correspond to the upper surfaces of the four valve guides on the workpiece 11. If a signal is missing among the four signals during detection, an alarm indicator light is activated to prompt manual intervention.

[0029] refer to Figure 4 and Figure 5 The working principle is as follows: When the workpiece 11 (cylinder head) arrives at the inspection station of the workpiece conveyor line 1, under the limiting and guiding action of the limiting guide wheel group 2, the workpiece 11 passes through the misinstallation detection plate 3 according to the set running trajectory. First, the correctness of the pressing height and installation direction of the valve guide 6 on the workpiece is checked. If all four valve guides 6 are installed correctly (the pressing depth of the guide is in place and the installation direction of the guide is correct), the workpiece can pass through the misinstallation detection plate 3; however, if the pressing depth of any valve guide is not in place or if it is installed backwards, the workpiece is detected as misinstalled. Plate 3 blocks and triggers an alarm, requiring manual handling of defective products. Products that pass the misinstallation detection plate 3 continue to be transported downstream, where the missing valve guides on the workpiece are detected by the missing sensor 4. If all four sensors have signals, the product is qualified. If any part is missing or any signal is missing, an alarm is triggered, prompting manual intervention. This effectively determines the correct installation of the cylinder head valve guides, achieving full inspection of the workpiece with a 100% accuracy rate, thus preventing defective products from entering subsequent processes.

[0030] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. Valve guide installation line automatic detection device, which is arranged at a detection station of a workpiece conveying line, characterized in that, include: Limiting guide wheel sets are installed on both sides of the workpiece conveyor line for accurate positioning and guidance during the workpiece's movement. A misassembly detection plate is installed above the workpiece's running trajectory. The misassembly detection plate has a judgment groove that is adapted to the positive end size of the valve guide. The missing sensor is installed above the workpiece's running trajectory, and the number of missing sensors corresponds to the valve guide holes on the workpiece.

2. The valve guide installation on-line inspection apparatus according to claim 1, wherein: The limiting guide wheel assembly includes several rollers arranged along the workpiece conveying direction.

3. The valve guide installation on-line inspection apparatus according to claim 2, wherein: Mounting plates are provided on both sides of the workpiece conveyor line, and the rollers are mounted on the mounting plates.

4. The valve guide installation on-line inspection apparatus according to claim 1, wherein: A support frame is provided at the inspection station of the workpiece conveyor line, and an inspection plate adjustment seat is installed on the support frame. The misfit inspection plate is installed on the inspection plate adjustment seat.

5. The valve guide installation on-line inspection apparatus according to claim 4, wherein: A sensor adjustment frame is mounted on the support frame, and the missing sensor is mounted on the sensor adjustment frame.

6. The valve guide installation on-line inspection apparatus according to claim 4, wherein: An alarm indicator light is installed on the support frame.

7. The valve guide installation on-line inspection apparatus according to any one of claims 1 to 6, characterized by: The missing sensor is located downstream of the mis-installation detection board.

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