Plunger sleeve inner hole flaw detection equipment

Abstract

The utility model discloses plunger sleeve inner hole flaw detection equipment, which relates to the technical field of flaw detection and comprises a processing table, a plurality of supporting foot pads are arranged at the bottom of the processing table, and a rack is arranged at the top of the processing table; the rotary bearing mechanism comprises a bearing seat and a driving motor, the bearing seat is fixedly installed at the top of the machining table, a rotating shaft is rotatably installed in the bearing seat, the top end of the rotating shaft extends to the position above the bearing seat, the rotating shaft is fixedly sleeved with a first gear, and the top of the rotating shaft is fixedly connected with a rotating tray; a plurality of conductor blocks are fixedly mounted in the rotary tray in a penetrating manner, the conductor blocks are distributed in an annular array manner, a nylon seat is mounted at the top of each conductor block in an embedded manner, and a first red copper plate and a first epoxy plate are fixedly mounted at the top of each conductor block. According to the utility model, the work efficiency of workpiece detection is greatly improved, the accuracy of the detection result can be effectively ensured, the operation is simple, time and labor are saved, and the overall practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of flaw detection technology, and in particular to a flaw detection device for the inner hole of a plunger sleeve. Background Technology

[0002] As a core component of the engine fuel injection pump, the plunger sleeve works closely with the plunger to pressurize and inject fuel. The quality of its inner bore directly affects the performance and service life of the equipment. Therefore, flaw detection of the plunger sleeve's inner bore is crucial during the manufacturing process.

[0003] Traditionally, the center conductor method is often used for circumferential flaw detection of internal holes. However, when the inner diameter is less than 1 / 4 of the outer diameter, this method suffers from inconsistent detection sensitivity between the inner and outer surfaces and poor detection results. Furthermore, the direct current method is unsuitable for magnetic particle inspection because it cannot generate a magnetic field distribution on the inner surface of hollow workpieces. For plunger sleeve workpieces with an inner diameter of only 8mm and an outer diameter of 60mm, magnetic particle inspection of their internal holes is particularly challenging. Therefore, a new plunger sleeve internal hole flaw detection device is urgently needed to solve these technical problems. Utility Model Content

[0004] This utility model discloses a plunger sleeve internal bore flaw detection device. It is equipped with a rotating bearing mechanism, an upper electrode mechanism, and a lower electrode mechanism. During operation, multiple plunger sleeve workpieces can be sequentially mounted on multiple nylon seats. Then, the drive motor is started, cooperating with the first gear, the second gear, the bearing seat, and the rotating shaft to rotate the rotating tray until one of the plunger sleeve workpieces is positioned between the upper electrode head and the lower electrode shaft. At this point, the lifting cylinder and the jacking cylinder are activated. The lifting cylinder moves the upper electrode head downwards until the second copper plate at the bottom of the upper electrode head abuts against the top of the workpiece. The jacking cylinder moves the lower electrode shaft upwards until the top of the upper electrode shaft abuts against the bottom of the conductor block. At this point, magnetic powder is sprayed into the interior of the plunger sleeve workpiece through the connecting cylinder, the upper electrode head, the lower electrode shaft, the conductor block, and the liquid spraying channel inside the nylon seat via external equipment, ensuring that the magnetic powder evenly covers the plunger. The inner hole of the workpiece is fitted, and then the upper electrode head and the lower electrode shaft are energized, so that the current flows from the lower electrode shaft into the second copper plate end of the conductor block, and then from the workpiece into the first copper plate end of the upper electrode head to form a circuit. The first epoxy plate and the second epoxy plate are insulated, so that the left half of the workpiece directly generates a magnetic field through the current, and the right half obtains a magnetic field through induction, so as to achieve the purpose of magnetizing the plunger sleeve workpiece. This allows longitudinal cracks to be clearly observed on both the inner and outer surfaces of the plunger sleeve workpiece under fluorescent light, effectively completing the inner hole flaw detection work. After the flaw detection of one workpiece is completed, the drive motor works, driving the rotating tray to rotate, taking the workpiece away from the detection station, and bringing the adjacent workpiece to be detected into the detection work, quickly starting the detection work of the next workpiece, greatly improving the efficiency of workpiece detection. In summary, the problems in the background technology are solved.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] The present invention relates to a plunger sleeve internal hole flaw detection device, including a processing table, the bottom of which is provided with multiple support pads, and the top of which is provided with a frame;

[0007] A rotating bearing mechanism includes a bearing housing and a drive motor. The bearing housing is fixedly installed on the top of the processing table. A rotating shaft is rotatably installed inside the bearing housing, with its top end extending above the bearing housing. A first gear is fixedly fitted onto the outside of the rotating shaft. A rotating tray is fixedly connected to the top of the rotating shaft. Multiple conductor blocks are fixedly installed through the rotating tray in a circular array. A nylon seat is embedded in the top of each conductor block. A first copper plate and a first epoxy plate are fixedly installed on the top of each conductor block. Both the first copper plate and the first epoxy plate are semi-circular plates. Both the conductor blocks and the nylon seat have vertically penetrating spray channels inside, and the spray channels inside the conductor blocks and the nylon seat are connected. The drive motor is fixedly installed on the top of the processing table. A second gear is fixedly connected to the output end of the drive motor, and the second gear meshes with the first gear.

[0008] The upper electrode mechanism includes a mounting base, one side of which is fixedly connected to the frame. A lifting cylinder is fixedly mounted on the top of the mounting base. A connecting cylinder is fixedly connected to the telescopic end of the lifting cylinder. The bottom of the connecting cylinder extends through the mounting base to the bottom of the mounting base. An upper electrode head is fixedly connected to the bottom of the connecting cylinder. A second copper plate and a second epoxy plate are fixedly mounted on the bottom of the upper electrode head. Both the second copper plate and the second epoxy plate are semi-circular plates. A liquid spraying channel is provided inside the connecting cylinder and inside the upper electrode head.

[0009] The lower electrode mechanism includes a fixed base, a lifting cylinder is fixedly installed inside the fixed base, and a lower electrode shaft is fixedly connected to the telescopic end of the lifting cylinder. The lower electrode shaft is matched with the position of the upper electrode head, and a liquid spraying channel is provided inside the lower electrode shaft.

[0010] Furthermore, the number of conductor blocks is six, and the six conductor blocks are arranged in a circular array with the center of the rotating tray as the center point.

[0011] Furthermore, an insulating seat is provided between the conductor block and the rotating tray, and the shape of the nylon seat is designed to match the shape of the plunger sleeve.

[0012] Furthermore, the liquid spraying channels inside the conductor block, nylon seat, connecting cylinder, upper electrode head, and lower electrode shaft are all located on the same vertical axis, and the dimensions of the liquid spraying channels inside the conductor block, nylon seat, connecting cylinder, upper electrode head, and lower electrode shaft are consistent.

[0013] Furthermore, a polyurethane pad is attached and fixed to the bottom of the first epoxy board, the top height of the first epoxy board is flush with the top height of the first copper board, the thickness of the first copper board is 3mm, and the thickness of the first epoxy board is 2mm.

[0014] Furthermore, the bottom height of the second copper plate is lower than the bottom height of the second epoxy plate, the thickness of the second copper plate is 3mm, and the thickness of the second epoxy plate is 2mm.

[0015] The present invention has the following advantages over the prior art:

[0016] 1. This technical solution, by setting up a rotating bearing mechanism, an upper electrode mechanism, and a lower electrode mechanism, allows multiple plunger sleeve workpieces to be sequentially mounted on the rotating bearing mechanism during operation. Then, the rotating bearing mechanism drives one of the plunger sleeve workpieces to move between the upper and lower electrode mechanisms. The upper electrode mechanism, in conjunction with the lower electrode mechanism and an external magnetic powder spraying mechanism, sprays magnetic powder onto the inner hole of the plunger sleeve workpiece, magnetizing the workpiece. This results in a magnetic field being directly generated on the left half of the workpiece through current, while the right half obtains a magnetic field through induction. Consequently, longitudinal cracks can be clearly observed on both the inner and outer surfaces of the plunger sleeve workpiece under fluorescent light. After the inspection is completed, the rotating bearing mechanism removes the inspected workpiece from the inspection station and brings the adjacent workpiece to be inspected into the inspection process, quickly starting the inspection of the next workpiece. This greatly improves the efficiency of workpiece inspection and effectively ensures the accuracy of the inspection results. It is simple to operate, saves time and effort, and has high overall practicality.

[0017] 2. This technical solution is equipped with an upper electrode head and a lower electrode shaft, both of which are provided with magnetic powder spray channels. This ensures that the magnetic powder evenly covers the inner hole surface of the workpiece, thereby effectively avoiding missed or false detections and improving the consistency and reliability of the detection. In addition, a nylon seat designed according to the shape characteristics of the plunger sleeve is provided to ensure that the workpiece is installed firmly and reduce detection errors caused by shaking or displacement. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the rotating tray installation structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the connecting cylinder installation structure of this utility model;

[0022] Figure 4 This is a partial structural diagram of the conductor seat installation of this utility model;

[0023] Figure 5 This is a partial structural diagram of the upper electrode head mounting of this utility model;

[0024] Figure 6 This is a side view of the structure of this utility model;

[0025] Figure 7 This is a top view of the structure of this utility model;

[0026] Figure 8 This is a schematic diagram of the combined structure of the first copper plate and the first epoxy plate of this utility model.

[0027] In the diagram: 1. Processing table; 2. Frame; 3. Rotary bearing mechanism; 301. Bearing seat; 302. Drive motor; 303. Polyurethane pad; 304. Rotating shaft; 305. First gear; 306. Rotating tray; 307. Conductor block; 308. Nylon seat; 309. First copper plate; 310. First epoxy plate; 311. Second gear; 312. Insulating seat; 4. Upper electrode mechanism; 401. Mounting seat; 402. Lifting cylinder; 403. Connecting cylinder; 404. Upper electrode head; 405. Second copper plate; 406. Second epoxy plate; 5. Lower electrode mechanism; 501. Fixed seat; 502. Lifting cylinder; 503. Lower electrode shaft. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "surface", "side", "gap", "peripheral", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Reference Figures 1-8A plunger sleeve internal bore flaw detection device includes a processing table 1, with multiple support feet at the bottom and a frame 2 at the top; a rotating bearing mechanism 3, comprising a bearing housing 301 and a drive motor 302. The bearing housing 301 is fixedly installed on the top of the processing table 1, and a rotating shaft 304 is rotatably mounted inside the bearing housing 301. The top end of the rotating shaft 304 extends above the bearing housing 301, and a first gear 305 is fixedly fitted on the outside of the rotating shaft 304. A rotating tray 306 is fixedly connected to the top of the rotating shaft 304, and multiple conductor blocks 307 are fixedly installed through the interior of the rotating tray 306. The conductor blocks 307 are arranged in a ring array. A nylon seat 308 is embedded in the top of the conductor block 307. A first copper plate 309 and a first epoxy plate 310 are fixedly installed on the top of the conductor block 307. Both the first copper plate 309 and the first epoxy plate 310 are semi-circular plates. The conductor block 307 and the nylon seat 308 are provided with vertically penetrating spray channels, and the spray channels inside the conductor block 307 and the nylon seat 308 are connected. The drive motor 302 is fixedly installed on the top of the processing table 1. The output end of the drive motor 302 is fixedly connected to a second gear 311, and the second gear 311 meshes with the first gear 305.

[0031] The upper electrode mechanism 4 includes a mounting base 401. One side of the mounting base 401 is fixedly connected to the frame 2. A lifting cylinder 402 is fixedly mounted on the top of the mounting base 401. A connecting cylinder 403 is fixedly connected to the telescopic end of the lifting cylinder 402. The bottom of the connecting cylinder 403 extends through the mounting base 401 to the bottom of the mounting base 401. An upper electrode head 404 is fixedly connected to the bottom of the connecting cylinder 403. A second copper plate 405 and a second epoxy resin plate are fixedly mounted on the bottom of the upper electrode head 404. Plate 406, the second copper plate 405, and the second epoxy plate 406 are all semi-circular plates. The interior of the connecting cylinder 403 and the interior of the upper electrode head 404 are provided with liquid spraying channels. The lower electrode mechanism 5 includes a fixed base 501. A lifting cylinder 502 is fixedly installed inside the fixed base 501. The telescopic end of the lifting cylinder 502 is fixedly connected to the lower electrode shaft 503. The lower electrode shaft 503 is matched with the position of the upper electrode head 404. The interior of the lower electrode shaft 503 is provided with liquid spraying channels.

[0032] There are six conductor blocks 307, which are arranged in a ring array with the center of the rotating tray 306 as the center point;

[0033] An insulating seat 312 is provided between the conductor block 307 and the rotating tray 306, and the shape of the nylon seat 308 is designed to match the shape of the plunger sleeve.

[0034] The liquid spraying channels inside the conductor block 307, nylon seat 308, connecting cylinder 403, upper electrode head 404, and lower electrode shaft 503 are all located on the same vertical axis, and the liquid spraying channels inside the conductor block 307, nylon seat 308, connecting cylinder 403, upper electrode head 404, and lower electrode shaft 503 have the same size.

[0035] A polyurethane pad 303 is attached and fixed to the bottom of the first epoxy board 310. The top height of the first epoxy board 310 is flush with the top height of the first copper plate 309. The thickness of the first copper plate 309 is 3mm and the thickness of the first epoxy board 310 is 2mm.

[0036] The bottom height of the second copper plate 405 is lower than the bottom height of the second epoxy plate 406. The thickness of the second copper plate 405 is 3mm, and the thickness of the second epoxy plate 406 is 2mm.

[0037] In the specific implementation process, during operation, multiple plunger sleeve workpieces can be sequentially mounted on multiple nylon seats 308. Then, the drive motor 302 is started, cooperating with the first gear 305, the second gear 311, the bearing seat 301, and the rotating shaft 304 to drive the rotating tray 306 to rotate until one of the plunger sleeve workpieces is located between the upper electrode head 404 and the lower electrode shaft 503. The lifting cylinder 402 and the jacking cylinder 502 are then activated. The lifting cylinder 402 moves the upper electrode head 404 downward until the second copper plate 405 at the bottom of the upper electrode head 404 abuts against the top of the workpiece. The jacking cylinder 502 moves the lower electrode shaft 503 upward until the top of the upper electrode shaft abuts against the bottom of the conductor block 307. At this time, magnetic powder is sprayed into the interior of the plunger sleeve workpiece through the spray channel inside the connecting cylinder 403, the upper electrode head 404, the lower electrode shaft 503, the conductor block 307, and the nylon seat 308 via external equipment, ensuring the magnetic powder is applied. The powder evenly covers the inner hole of the plunger sleeve workpiece. Then, the upper electrode head 404 and the lower electrode shaft 503 are energized, so that the current flows from the lower electrode shaft 503 into the second copper plate 405 end of the conductor block 307, and then flows from the workpiece into the first copper plate 309 end of the upper electrode head 404 to form a circuit. The first epoxy plate 310 and the second epoxy plate 406 are insulated, so that the left half of the workpiece directly generates a magnetic field through the current, and the right half obtains a magnetic field through induction, thereby achieving the purpose of magnetizing the plunger sleeve workpiece. This allows the longitudinal cracks to be clearly observed on both the inner and outer surfaces of the plunger sleeve workpiece under fluorescent light, effectively completing the inner hole flaw detection work. After the flaw detection of one workpiece is completed, the drive motor 302 works, driving the rotating tray 306 to rotate, taking the workpiece away from the detection station after the detection work is completed, and bringing the adjacent workpiece to be detected into the detection work, quickly starting the detection work of the next workpiece, which greatly improves the efficiency of workpiece detection.

[0038] The conductor blocks 307 are arranged in a circular array around the center of the rotating tray 306. This arrangement allows for the removal of the completed plunger sleeve workpiece during inspection, replacing it with a new workpiece to be inspected, thus improving inspection efficiency.

[0039] The insulating seat 312 between the conductor block 307 and the rotating tray 306 is provided to ensure the insulation between the conductor block 307 and the rotating tray 306, and to prevent current from passing through the rotating tray 306 and causing injury to the workers loading and unloading materials. The shape of the nylon seat 308 is designed to match the shape of the plunger sleeve in order to effectively ensure the workpiece is installed stably and reduce the detection error caused by shaking or displacement.

[0040] The liquid spraying channels inside the conductor block 307, nylon seat 308, connecting cylinder 403, upper electrode head 404, and lower electrode shaft 503 are all located on the same vertical axis, and the liquid spraying channels inside the conductor block 307, nylon seat 308, connecting cylinder 403, upper electrode head 404, and lower electrode shaft 503 are of the same size in order to ensure that the magnetic powder can be sprayed into the inner hole of the plunger sleeve workpiece without obstruction.

[0041] Among them, the bottom of the first epoxy plate 310 is attached and fixed with a polyurethane pad 303. The top height of the first epoxy plate 310 is flush with the top height of the first copper plate 309 to ensure the stability of the workpiece. The thickness of the first copper plate 309 is 3mm to ensure the conductivity of the first copper plate 309.

[0042] The thickness of the second copper plate 405 is 3mm to ensure its conductivity.

[0043] Working Principle: During operation, multiple plunger sleeve workpieces are sequentially mounted onto multiple nylon seats 308. Then, the drive motor 302 is started, cooperating with the first gear 305, the second gear 311, the bearing seat 301, and the rotating shaft 304 to rotate the rotating tray 306 until one of the plunger sleeve workpieces is positioned between the upper electrode head 404 and the lower electrode shaft 503. The lifting cylinder 402 and the jacking cylinder 502 are then activated. The lifting cylinder 402 moves the upper electrode head 404 downwards until the second copper plate 405 at the bottom of the upper electrode head 404 abuts against the top of the workpiece. The jacking cylinder 502 moves the lower electrode shaft 503 upwards until the top of the upper electrode shaft abuts against the bottom of the conductor block 307. At this point, magnetic powder is sprayed into the interior of the plunger sleeve workpiece through the spray channels inside the connecting cylinder 403, the upper electrode head 404, the lower electrode shaft 503, the conductor block 307, and the nylon seat 308 via external equipment, ensuring uniform distribution of the magnetic powder. The inner hole of the plunger sleeve workpiece is evenly covered, and then the upper electrode head 404 and the lower electrode shaft 503 are energized. The current flows from the lower electrode shaft 503 into the second copper plate 405 end of the conductor block 307, and then flows from the workpiece into the first copper plate 309 end of the upper electrode head 404 to form a circuit. The first epoxy plate 310 and the second epoxy plate 406 are insulated, so that the left half of the workpiece directly generates a magnetic field through the current, and the right half obtains a magnetic field through induction, thereby achieving the purpose of magnetizing the plunger sleeve workpiece. The longitudinal cracks can be clearly observed on both the inner and outer surfaces of the plunger sleeve workpiece under fluorescent light, effectively completing the inner hole flaw detection work. After the flaw detection of one workpiece is completed, the drive motor 302 works, driving the rotating tray 306 to rotate, taking the workpiece away from the detection station and bringing the adjacent workpiece to be detected into the detection work, quickly starting the detection work of the next workpiece, which greatly improves the efficiency of workpiece detection.

[0044] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A flaw detection device for the inner bore of a plunger sleeve, comprising a processing table (1), characterized in that: The bottom of the processing table (1) is provided with multiple support feet, and the top of the processing table (1) is provided with a frame (2); A rotating bearing mechanism (3) includes a bearing housing (301) and a drive motor (302). The bearing housing (301) is fixedly installed on the top of the processing table (1). A rotating shaft (304) is rotatably installed inside the bearing housing (301). The top end of the rotating shaft (304) extends above the bearing housing (301). A first gear (305) is fixedly fitted on the outside of the rotating shaft (304). A rotating tray (306) is fixedly connected to the top of the rotating shaft (304). Multiple conductor blocks (307) are fixedly installed in a through-type manner inside the rotating tray (306). The multiple conductor blocks (307) are arranged in a ring array. A nylon seat (308) is embedded in the top of the conductor block (307). A first copper plate (309) and a first epoxy plate (310) are fixedly installed on the top of the conductor block (307). The first copper plate (309) and the first epoxy plate (310) are both semi-circular plates. The conductor block (307) and the nylon seat (308) are both provided with vertically penetrating spray channels. The spray channels inside the conductor block (307) and the nylon seat (308) are connected. The drive motor (302) is fixedly installed on the top of the processing table (1). The output end of the drive motor (302) is fixedly connected to a second gear (311). The second gear (311) meshes with the first gear (305). The upper electrode mechanism (4) includes a mounting base (401), one side of which is fixedly connected to the frame (2). A lifting cylinder (402) is fixedly installed on the top of the mounting base (401). A connecting cylinder (403) is fixedly connected to the telescopic end of the lifting cylinder (402). The bottom of the connecting cylinder (403) extends through the mounting base (401) to the bottom of the mounting base (401). An upper electrode head (404) is fixedly connected to the bottom of the connecting cylinder (403). A second copper plate (405) and a second epoxy plate (406) are fixedly installed on the bottom of the upper electrode head (404). The second copper plate (405) and the second epoxy plate (406) are both semi-circular plates. A liquid spraying channel is provided inside the connecting cylinder (403) and inside the upper electrode head (404). The lower electrode mechanism (5) includes a fixed base (501), a lifting cylinder (502) is fixedly installed inside the fixed base (501), and a lower electrode shaft (503) is fixedly connected to the telescopic end of the lifting cylinder (502). The lower electrode shaft (503) is matched with the position of the upper electrode head (404), and a liquid spraying channel is provided inside the lower electrode shaft (503).

2. The plunger sleeve internal bore flaw detection device according to claim 1, characterized in that: The number of conductor blocks (307) is six, and the six conductor blocks (307) are arranged in a ring array with the center of the rotating tray (306) as the center point.

3. The plunger sleeve internal bore flaw detection device according to claim 1, characterized in that: An insulating seat (312) is provided between the conductor block (307) and the rotating tray (306), and the shape of the nylon seat (308) is designed to match the shape of the plunger sleeve.

4. The plunger sleeve internal bore flaw detection device according to claim 1, characterized in that: The liquid spraying channels inside the conductor block (307), nylon seat (308), connecting cylinder (403), upper electrode head (404), and lower electrode shaft (503) are all located on the same vertical axis, and the liquid spraying channels inside the conductor block (307), nylon seat (308), connecting cylinder (403), upper electrode head (404), and lower electrode shaft (503) have the same size.

5. The plunger sleeve internal bore flaw detection device according to claim 1, characterized in that: A polyurethane pad (303) is attached and fixed to the bottom of the first epoxy board (310). The top height of the first epoxy board (310) is flush with the top height of the first copper plate (309). The thickness of the first copper plate (309) is 3mm, and the thickness of the first epoxy board (310) is 2mm.

6. The plunger sleeve internal bore flaw detection device according to claim 1, characterized in that: The bottom height of the second copper plate (405) is lower than the bottom height of the second epoxy plate (406). The thickness of the second copper plate (405) is 3mm, and the thickness of the second epoxy plate (406) is 2mm.

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