Rolling stock crack detection device

Abstract

The utility model discloses a kind of roll pressure piece crack detection devices, including detection part, detection part includes support one, support one is set to roll pressure production line side, support one is provided with detection seat;Detection seat includes guide sleeve, compression block;Compression block is provided with compression wheel and eddy current detection sensor;Guide sleeve is provided with guide hole, compression block is provided with the guide column matched with the guide hole, compression block is further connected with compression spring between guide sleeve, under the effect of compression spring, compression block drives compression wheel and product piece outer surface rolling contact mode contact.The utility model has the characteristics of reliable detection, accurate marking, high safety, good reliability.

Description

Technical Field

[0001] This utility model relates to the field of roller pressing technology, and specifically to a crack detection device for roller-pressed parts. Background Technology

[0002] In the field of mechanical manufacturing, roll forming involves feeding sheet metal into a roll forming mill containing multiple pairs of rollers, each pair gradually bending the sheet into the desired final shape. This incremental method minimizes strain and compensates for springback. Roll forming is suitable for parts requiring mass production, complex cross-sections, long lengths, and strict dimensional tolerances. Due to the poor elongation of high-strength steel sheets, especially ultra-high-strength steel with a tensile strength greater than 780 MPa, the use of roll forming composite processes to produce irregularly shaped cold-formed steel sections is essential, such as bumper bodies, anti-collision bars, door sills, and seat rails. The following problems exist in sheet metal roll forming: if the part has small rounded corners, the high-strength sheet may crack during the roll forming process, or the pre-punched holes may crack due to the extrusion pressure of the rollers during the roll forming process. Cracking in rolled parts directly leads to the scrapping of the product. However, these rolled cracks are irregular and their dimensions are uncertain, ranging from 3-5mm to over 100mm in length. Manual inspection alone is not only labor-intensive but also prone to missing cracks, and some small cracks are difficult to detect. When products with these crack defects are used, such as vehicle bumpers or crash bars installed on the vehicle body, these products are structural support components, and the presence of cracks can cause safety hazards. Therefore, detecting and marking cracks in rolled parts is crucial. Utility Model Content

[0003] This invention aims to overcome the deficiencies of existing technologies and provide a device for detecting cracks in rolled parts, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The above-mentioned roller-pressed part crack detection device includes a detection unit, which includes a support frame. The support frame is disposed on the side of the roller pressing production line, and a detection seat is disposed on the support frame. The testing seat includes a guide sleeve and a clamping block; the clamping block is equipped with a clamping wheel and an eddy current detection sensor; the guide sleeve is equipped with a guide hole, and the clamping block is equipped with a guide post that matches the guide hole; a clamping spring is also connected between the clamping block and the guide sleeve. Under the action of the clamping spring, the clamping block drives the clamping wheel to make rolling contact with the outer surface of the product.

[0005] The aforementioned roller-pressed part crack detection device further includes a control unit, which includes a CPU, an alarm, and a control circuit. The signal output of the eddy current detection sensor is connected to the CPU, and the output of the CPU is connected to the control alarm.

[0006] The aforementioned roller-pressed component crack detection device further includes a marking unit, which includes a second bracket with a mounting plate. The mounting plate is equipped with a cylinder and a self-spraying paint. The piston rod of the cylinder matches the spray nozzle of the self-spraying paint. The cylinder is connected to an air source via a solenoid valve.

[0007] The control unit of the aforementioned roller-pressed component crack detection device further includes a speed measuring wheel and a Hall sensor; The speed measuring wheel is mounted on the roller pressing table via bracket three and rolls in contact with the product. A magnet is mounted on the speed measuring wheel, and a Hall effect sensor is mounted on bracket three and matches the magnet. The signal output of the Hall effect sensor is connected to the input of the CPU, and the output of the CPU is connected to the control solenoid valve.

[0008] The aforementioned roller-pressed component crack detection device has an adjustment part between the support and the detection seat. The adjustment part is a cross slide module, which consists of a high-low slide module and a horizontal slide module. The horizontal slide module is installed on the high-low slide seat of the high-low slide module. A support plate is provided on the horizontal slide seat of the horizontal slide module, and a rotating shaft is provided on the support plate. The guide sleeve is rotatably installed on the support plate through the rotating shaft.

[0009] The aforementioned roller-pressed component crack detection device has a strip-shaped hole on the guide sleeve, the strip-shaped hole being arc-shaped, and a locking screw matching the strip-shaped hole is provided on the support plate. The locking screw and the nut cooperate to lock and unlock the guide sleeve. Beneficial effects

[0010] Compared with the prior art, this utility model has the following advantages: First, by setting a detection unit on the side of the roll forming production line, an eddy current detection sensor continuously scans and inspects the product parts online. Under the action of the clamping spring, the clamping block drives the clamping wheel to roll into contact with the outer surface of the product part, ensuring a constant distance between the eddy current detection sensor and the product part, unaffected by minor deformations of the product part, and enabling all-round detection of cracks. Compared with manual inspection, this not only improves efficiency but also eliminates missed or false detections. Second, the marking unit in the detection device can mark the detected cracks. In conjunction with the control unit, it can automatically spray paint marking based on the product part's movement speed on the production line measured by the speed measuring wheel and the time it takes for the eddy current detection sensor to detect the crack. Third, the designed adjustment unit allows for adjustment of the detection seat in the height and horizontal directions. The guide sleeve is rotatably mounted on the support plate, allowing adjustment of the detection angle of the detection seat to ensure good contact with the product part for inspection. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings.

[0012] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is another partial structural schematic diagram of this utility model; Figure 4 This is a schematic diagram of the speed measuring wheel structure of this utility model; Figure 5 This is a circuit control schematic diagram of this utility model.

[0013] The labels in the diagram represent: 1. Bracket 1, 2. Detection seat, 3. Product component, 4. Bracket 2, 5. Speed ​​measuring wheel, 6. Hall sensor, 7. High and low slide block, 8. Horizontal slide block, 2-1. Guide sleeve, 2-1-1. Strip hole, 2-2. Pressing block, 2-3. Pressing wheel, 2-4. Eddy current detection sensor, 2-5. Pressing spring, 2-6. Alarm, 4-1. Mounting plate, 4-2. Cylinder, 4-2-1. Solenoid valve, 4-3. Spray paint, 5-1. Bracket 3, 5-2. Magnet, 8-1. Support plate, 8-2. Rotating shaft, 8-3. Locking screw. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1-5 As shown, this utility model includes a detection unit, which includes a support 1. The support 1 is disposed on the side of the roll forming production line, and a detection seat 2 is disposed on the support 1.

[0016] The detection seat 2 includes a guide sleeve 2-1 and a clamping block 2-2; the clamping block 2-2 is provided with a clamping wheel 2-3 and an eddy current detection sensor 2-4; the guide sleeve 2-1 is provided with a guide hole, and the clamping block 2-2 is provided with a guide post that matches the guide hole; a clamping spring 2-5 is also connected between the clamping block 2-2 and the guide sleeve 2-1. Under the action of the clamping spring 2-5, the clamping block 2-2 drives the clamping wheel 2-3 to make rolling contact with the outer surface of the product part 3.

[0017] The detection device also includes a control unit, which includes a CPU, an alarm and a control circuit. The signal output of the eddy current detection sensors 2-4 is connected to the CPU, and the output of the CPU is connected to control the alarm.

[0018] Under the action of external force, the clamping block 2-2 can slide along the guide hole on the guide sleeve 2-1, which can ensure that the distance between the eddy current detection sensor and the product part is constant and is not affected by the slight deformation of the product part. It can detect cracks from all directions. Compared with manual inspection, it not only improves efficiency, but also avoids missed detection and false detection.

[0019] The eddy current sensor 2-4 can be a BKN-R8 crack probe or a BKN-A8 crack probe manufactured by Nanjing Bokna Automation Systems Co., Ltd. The distance between the eddy current sensor 2-4 and the product part can be adjusted to 0.5-1mm. The eddy current sensor 2-4 can be fixed on the clamping block 2-2; the eddy current sensor 2-4 can also be movably fixed on the clamping block 2-2 by installing the eddy current sensor on a sensor base, with the sensor base and the clamping block 2-2 connected by a sliding pair. Specifically, a sliding hole can be provided on the clamping block, and a sliding shaft matching the sliding hole can be provided on the sensor base. A fastening screw can be provided on the wall of the sliding hole; rotating the fastening screw causes the screw head to press against the sliding shaft, thus locking the sliding shaft on the sensor base to the sliding hole on the clamping block.

[0020] The bracket 1 is installed on the side of the roll forming production line, or it can be installed on the roll forming table 9. The product part 3 moves on the roll forming production line. The CPU can be a C8051F340 series chip, or a PLC controller can be used for control. The PLC controller can be a Siemens AMX-200SMART series controller.

[0021] To facilitate subsequent cutting and identification, the detected cracks need to be marked, which can be done in the following way: The detection device also includes a marking part, which includes a bracket 4, a mounting plate 4-1 on the bracket 4, a cylinder 4-2 and a spray paint 4-3 on the mounting plate 4-1, the piston rod of the cylinder 4-2 is matched with the spray handle of the spray paint 4-3; the cylinder 4-2 is connected to the air source through a solenoid valve 4-2-1.

[0022] Support 2 4 is installed on the side of the roll forming production line and can be installed on the roll forming table 9. The piston rod of cylinder 4-2 is matched with the spray paint 4-3. Under the push of the piston rod, the spray paint 4-3 can realize automatic painting. The piston rod of cylinder 4-2 can make contact with the spray nozzle of spray paint 4-3. When the solenoid valve 4-2-1 is turned on, the piston rod pushes the spray nozzle of spray paint 4-3 to realize automatic painting marking at the crack.

[0023] To achieve automatic and accurate marking of cracks, the control unit also includes a speed measuring wheel 5 and a Hall sensor 6. The speed measuring wheel 5 is mounted on the roller pressing table via a bracket 3-1 and rolls in contact with the product part 3. A magnet 5-2 is mounted on the speed measuring wheel 5, and the Hall sensor 6 is mounted on the bracket 3-1 and matches the magnet 5-2. The signal output of the Hall sensor 6 is connected to the input terminal of the CPU, and the output terminal of the CPU is connected to the control solenoid valve 4-2-1. The CPU output control can be achieved by connecting a transistor amplifier circuit to the output terminal. For example, to control the solenoid valve 4-2-1, its output terminal is connected to the base of transistor T1, and the collector of transistor T1 is connected to the first relay J1. The two normally open contacts J1-1 of the first relay J1 are connected to the control solenoid valve 4-2-1. The alarm 2-6 can use the same connection control method. Of course, the design of the control circuit is diverse, and other conventional control circuits can also be used.

[0024] The speed measuring wheel 5 can be made of rubber to prevent slippage between it and the product part 3. Based on the moving speed of the product part 3 and the time it takes for the eddy current detection sensor 2-4 to detect the crack location, the control component calculates the time it takes for the crack location to pass through the marking section, thereby controlling the marking section to start spraying paint. When the solenoid valve 4-2-1 is turned on, the piston rod of the cylinder 4-2 pushes the pressure spray handle of the self-spraying paint 4-3 to achieve automatic paint spraying at the crack.

[0025] To facilitate adjustment of the position between the inspection unit and the product: an adjustment unit is provided between the bracket 1 and the inspection seat 2. The adjustment unit is a cross slide module, which consists of a high-low slide module and a horizontal slide module. The horizontal slide module is installed on the high-low slide seat 7 of the high-low slide module. A support plate 8-1 is provided on the horizontal slide seat 8 of the horizontal slide module. A rotating shaft 8-2 is provided on the support plate 8-1. The guide sleeve 2-1 is rotatably installed on the support plate 8-1 through the rotating shaft 8-2.

[0026] The guide sleeve 2-1 is provided with mounting holes that match the rotating shaft 8-2. The cross slide module can adopt a ball screw structure or a synchronous belt structure. The cross ball screw slide module of FTS120XY series of Foyu Technology, or the T-type ball screw 1204-100-S manual rocker ball screw slide module of Kenluode, or the T-type ball screw 1204-200-S manual rocker ball screw slide module can be selected.

[0027] A strip-shaped hole 2-1-1 is provided on the guide sleeve 2-1. The strip-shaped hole 2-1-1 is arc-shaped. A locking screw 8-3 matching the strip-shaped hole 2-1-1 is provided on the support plate 8-1. The locking screw 8-3 cooperates with the screw to lock and unlock the guide sleeve 2-1.

Claims

1. A device for detecting cracks in rolled parts, characterized in that, The device includes a testing unit, which includes a support (1) and is located on the side of the roller pressing production line. A testing seat (2) is provided on the support (1). The detection seat (2) includes a guide sleeve (2-1) and a clamping block (2-2); the clamping block (2-2) is provided with a clamping wheel (2-3) and an eddy current detection sensor (2-4); the guide sleeve (2-1) is provided with a guide hole, the clamping block (2-2) is provided with a guide post that matches the guide hole, and a clamping spring (2-5) is also connected between the clamping block (2-2) and the guide sleeve (2-1). Under the action of the clamping spring (2-5), the clamping block (2-2) drives the clamping wheel (2-3) to roll into contact with the outer surface of the product part (3).

2. The roll forming crack detection device according to claim 1, characterized in that, The detection device also includes a control unit, which includes a CPU, an alarm and a control circuit. The signal output of the eddy current detection sensor (2-4) is connected to the CPU, and the output of the CPU is connected to control the alarm (2-6).

3. The roll forming crack detection device according to claim 2, characterized in that, The detection device also includes a marking part, which includes a bracket two (4), a mounting plate (4-1) is provided on the bracket two (4), and a cylinder (4-2) and a spray paint (4-3) are provided on the mounting plate (4-1). The piston rod of the cylinder (4-2) matches the spray handle of the spray paint (4-3). The cylinder (4-2) is connected to the air source through a solenoid valve (4-2-1).

4. The roll forming crack detection device according to claim 3, characterized in that, The control unit also includes a speed measuring wheel (5) and a Hall sensor (6). The speed measuring wheel (5) is set on the roller pressing table through the bracket three (5-1) and rolls in contact with the product part (3). A magnet (5-2) is set on the speed measuring wheel (5), and the Hall sensor (6) is set on the bracket three (5-1) and matches the magnet (5-2). The signal output of the Hall sensor (6) is connected to the input terminal of the CPU, and the output terminal of the CPU is connected to the control solenoid valve (4-2-1).

5. The roll forming crack detection device according to claim 1, characterized in that, An adjustment section is provided between the bracket (1) and the detection seat (2). The adjustment section is a cross slide module, which consists of a high-low slide module and a horizontal slide module. The horizontal slide module is installed on the high-low slide seat (7) of the high-low slide module. A support plate (8-1) is provided on the horizontal slide seat (8) of the horizontal slide module. A rotating shaft (8-2) is provided on the support plate (8-1). The guide sleeve (2-1) is rotatably installed on the support plate (8-1) through the rotating shaft (8-2).

6. The roll forming crack detection device according to claim 5, characterized in that, A strip hole (2-1-1) is provided on the guide sleeve (2-1). The strip hole (2-1-1) is arc-shaped. A locking screw (8-3) matching the strip hole (2-1-1) is provided on the support plate (8-1). The locking screw (8-3) cooperates with the screw to lock and unlock the guide sleeve (2-1).

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