Hydraulic cylinder barrel and cylinder bottom welding flaw detection device

Abstract

The utility model belongs to the technical field of hydraulic cylinder welding flaw detection, and particularly relates to a hydraulic cylinder barrel and cylinder bottom welding flaw detection device which comprises a base, a portal frame is fixedly connected to the top of the base, and an ultrasonic flaw detector and two chucks are arranged in the portal frame and used for conducting flaw detection on a weld joint. An adjusting and positioning mechanism is arranged between the portal frame and the ultrasonic flaw detector, a lower air cylinder is fixedly connected to the top of the base, and a containing groove is fixedly connected to an output shaft of the lower air cylinder. The hydraulic cylinder bottom centering and fixing device is reasonable in structural design, through the clamping, centering and fixing mechanism, the cylinder bottoms of the cylinder barrels can be centered, clamped and fixed, the situation that the flaw detection precision is affected due to deviation is avoided, the cylinder bottoms of the hydraulic cylinder barrels with different diameters can be fixed, the universality of the device is improved, and the detection accuracy is improved according to the diameters and the lengths of the cylinder bottoms. The height and the position of the ultrasonic flaw detector can be adjusted, so that the universality of the device is further improved.

Description

A hydraulic cylinder barrel and cylinder bottom weld flaw detection device Technical Field

[0001] This utility model relates to the field of hydraulic cylinder welding flaw detection technology, and in particular to a hydraulic cylinder barrel and cylinder bottom welding flaw detection device. Background Technology

[0002] After the bottom of the hydraulic cylinder is welded, a flaw detection device is needed to inspect the weld seam. The flaw detection device is generally an ultrasonic flaw detector, such as the ZXUD-66 digital ultrasonic flaw detector.

[0003] However, the hydraulic cylinder barrel and cylinder bottom welding flaw detection device in the relevant technology still has shortcomings in use. It is inconvenient to center and clamp the cylinder barrel and cylinder bottom of hydraulic cylinders of different diameters, which makes it easy for the cylinder barrel and cylinder bottom to rotate out of axis with respect to the shaft, reducing the accuracy of flaw detection. In addition, the total length of the cylinder barrel and cylinder bottom is not the same as the height of the cylinder bottom, making it inconvenient to adjust the probe of the ultrasonic flaw detector to the weld position, thus reducing the practicality of the device. Therefore, we propose a hydraulic cylinder barrel and cylinder bottom welding flaw detection device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings mentioned above by proposing a flaw detection device for the welding of the cylinder barrel and cylinder bottom of a hydraulic cylinder.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hydraulic cylinder barrel and bottom weld flaw detection device includes a base, a gantry frame fixedly connected to the top of the base, an ultrasonic flaw detector for weld flaw detection and two clamping plates installed inside the gantry frame, an adjustment and positioning mechanism between the gantry frame and the ultrasonic flaw detector, a lower cylinder fixedly connected to the top of the base, a placement groove fixedly connected to the output shaft of the lower cylinder, a cylinder barrel of the hydraulic cylinder movably placed in the placement groove, a cylinder bottom welded to one side of the cylinder barrel, a rotary motor fixedly connected to one side of the gantry frame, an upper cylinder fixedly connected to the other side of the gantry frame, a moving plate fixedly connected to the output shaft of the upper cylinder, a rotating shaft rotatably connected to one side of the moving plate, two clamping plates respectively fixedly connected to one end of the rotating shaft and the output shaft of the rotary motor, a clamping and centering fixing mechanism installed on the clamping plates, and a controller fixedly connected to one side of the gantry frame.

[0007] As a preferred embodiment of this invention, two guide rods are slidably arranged on the other side of the gantry frame, and the movable plate is fixedly connected to one end of the two guide rods.

[0008] As a preferred embodiment of this utility model, the clamping and centering fixing mechanism includes threaded rods rotatably connected to the inner walls around the clamping plate, and bevel gears are fixedly connected to the ends of the four threaded rods that are close to each other. Adjacent bevel gears mesh with each other, and the outer thread of the threaded rods is fitted with a clamping claw.

[0009] As a preferred embodiment of this utility model, the clamping plate has four elongated holes on one side, and the four clamping claws are slidably fitted into the corresponding elongated holes.

[0010] In a preferred embodiment of this utility model, a square rod is fixedly connected to the top of the threaded rod, an arc-shaped internal gear ring is fixedly connected to the top of the chuck, a square sleeve is slidably fitted on the outer side of the square rod, a gear is fixedly connected to the top of the square sleeve, the gear meshes with the arc-shaped internal gear ring, a damping sleeve is fixedly fitted inside the square rod, and the square rod is damped and slidably fitted inside the damping sleeve.

[0011] As a preferred embodiment of this invention, a fixing plate is fixedly connected to the top of the clamping plate, and the arc-shaped internal toothed ring is fixedly connected to one side of the fixing plate.

[0012] In a preferred embodiment of this utility model, the adjustment and positioning mechanism includes a drive motor fixedly connected to one side of the gantry frame, an adjusting screw fixedly connected to the output shaft of the drive motor, a slide block threaded onto the outer side of the adjusting screw, an electric push rod fixedly connected to the bottom of the slide block, a mounting plate fixedly connected to the output shaft of the electric push rod, a laser emitter fixedly connected to the bottom of the mounting plate, and an ultrasonic flaw detector fixedly connected to the bottom of the mounting plate.

[0013] As a preferred embodiment of this utility model, a support plate is fixedly connected to the top inner wall of the gantry frame, the adjusting screw is rotatably connected to one side of the support plate, the support plate and the gantry frame are fixedly connected to the same limiting rod, and the slide is slidably sleeved on the outside of the limiting rod.

[0014] In this utility model, a hydraulic cylinder barrel and cylinder bottom welding flaw detection device is described. The cylinder barrel and cylinder bottom are placed in a placement groove. The lower cylinder drives the placement groove and cylinder barrel and cylinder bottom to move upward and coaxial with the clamping plate. Then, the upper cylinder drives the moving plate and the left clamping plate to move to the left, so that the cylinder barrel and cylinder bottom abut against the two clamping plates. The gear is pulled upward, so that the damping sleeve and the square sleeve slide on the square rod with damping. At the same time, the gear moves upward to a position that does not mesh with the arc-shaped internal gear ring. At this time, the gear is not fixed. Through the gear, the square sleeve, the square rod and a threaded rod are rotated. Under the meshing transmission of four bevel gears, the upper and lower threaded rods are driven to rotate in opposite directions, and the front and rear threaded rods are driven to rotate in opposite directions. Then, the four threaded rods drive the four jaws to move inward synchronously, so as to clamp and center the cylinder barrel and cylinder bottom. The cylinder barrel and cylinder bottom are fixedly set coaxially with the rotating shaft and the clamping plate, so as to avoid the cylinder barrel and cylinder bottom from deflecting and affecting the accuracy of flaw detection.

[0015] In this utility model, a hydraulic cylinder barrel and cylinder bottom welding flaw detection device is described. According to the length of the cylinder bottom, the drive motor drives the adjustment screw to rotate. The adjustment screw drives the slide and ultrasonic flaw detector to move laterally. A laser is emitted through a laser emitter. When the laser irradiates the weld position, the drive motor is turned off. The distance between the ultrasonic flaw detector and the weld can be adjusted by an electric push rod to perform flaw detection on the weld more accurately. During flaw detection, the rotary motor is started. The rotary motor drives the two clamping plates and the cylinder barrel and cylinder bottom to rotate, so that the entire weld of the cylinder barrel and cylinder bottom can be flaw detected.

[0016] This utility model has a reasonable structural design. Through the clamping and centering fixing mechanism, it can not only center and fix the cylinder barrel and cylinder bottom to avoid displacement that would affect the accuracy of flaw detection, but also fix the cylinder barrel and cylinder bottom of hydraulic cylinders of different diameters, improving the versatility of the device. According to the diameter and the length of the cylinder bottom, the height and position of the ultrasonic flaw detector can be adjusted, further improving the versatility of the device. Attached Figure Description

[0017] Figure 1 is a first-view perspective perspective view of a hydraulic cylinder barrel bottom welding flaw detection device proposed in this utility model.

[0018] Figure 2 is a second-view perspective view of a hydraulic cylinder barrel bottom welding flaw detection device proposed in this utility model.

[0019] Figure 3 is a cross-sectional view of the clamping plate of a hydraulic cylinder barrel bottom welding flaw detection device proposed in this utility model;

[0020] Figure 4 is a schematic diagram of the structure of part A in Figure 3.

[0021] In the diagram: 1. Base; 2. Gantry frame; 3. Adjustment and positioning mechanism; 4. Rotary motor; 5. Clamping plate; 6. Cylinder bottom; 7. Clamping and centering fixing mechanism; 8. Cylinder barrel; 9. Placement slot; 10. Lower cylinder; 11. Rotating shaft; 12. Moving plate; 13. Upper cylinder; 14. Guide rod; 31. Drive motor; 32. Slide seat; 33. Limit rod; 34. Adjusting screw; 35. Support plate; 36. Electric push rod; 37. Mounting plate; 38. Laser emitter; 39. Ultrasonic flaw detector; 701. Bevel gear; 702. Threaded rod; 703. Clamping jaw; 704. Damping sleeve; 705. Long slot; 706. Gear; 707. Arc-shaped internal gear ring; 708. Fixing plate; 709. Square rod; 710. Square sleeve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Referring to Figures 1-4, a hydraulic cylinder barrel and bottom welding flaw detection device includes a base 1. A gantry frame 2 is fixedly connected to the top of the base 1. An ultrasonic flaw detector 39 for weld flaw detection and two clamping plates 5 are installed inside the gantry frame 2. An adjustment and positioning mechanism 3 is provided between the gantry frame 2 and the ultrasonic flaw detector 39. A lower cylinder 10 is fixedly connected to the top of the base 1. A placement groove 9 is fixedly connected to the output shaft of the lower cylinder 10. The cylinder barrel 8 of the hydraulic cylinder is movably placed in the placement groove 9. A cylinder bottom 6 is welded to one side of the cylinder barrel 8. A rotary motor 4 is fixedly connected to one side of the gantry frame 2. An upper cylinder 13 is fixedly connected to the other side of the gantry frame 2. A moving plate 12 is fixedly connected to the output shaft of the upper cylinder 13. A rotating shaft 11 is rotatably connected to one side of the moving plate 12. Two clamping plates 5 are respectively fixedly connected to one end of the rotating shaft 11 and the output shaft of the rotary motor 4. A clamping and centering fixing mechanism 7 is provided on the clamping plates 5. A controller 15 is fixedly connected to one side of the gantry frame 2.

[0024] Furthermore, two guide rods 14 are slidably provided on the other side of the gantry frame 2, and the moving plate 12 is fixedly connected to one end of the two guide rods 14, which facilitates the guiding and limiting of the moving plate 12, making its lateral movement more stable.

[0025] Further, referring to Figures 1-4, the clamping and centering fixing mechanism 7 includes threaded rods 702 rotatably connected to the inner walls of the clamping plate 5. Each of the four threaded rods 702 has a bevel gear 701 fixedly connected to one end close to each other. Two adjacent bevel gears 701 mesh with each other. The outer side of the threaded rods 702 is threaded with a jaw 703. The top of the top threaded rods 702 is fixedly connected with a square rod 709. The top of the clamping plate 5 is fixedly connected with an arc-shaped internal gear ring 707. The outer side of the square rod 709 is slidably fitted with a square sleeve 710. The top of the square sleeve 710 is fixedly connected with a gear 706. The gear 706 meshes with the arc-shaped internal gear ring 707. The square rod 709 is fixedly fitted with a damping sleeve 704. The square rod 709 is damped and slidably fitted inside the damping sleeve 704.

[0026] Using the above scheme: the cylinder bottom is placed in the placement groove 9. The lower cylinder 10 drives the placement groove 9 and the cylinder bottom to move upwards, coaxial with the clamping plate 5. Then, the upper cylinder 13 drives the moving plate 12 and the left clamping plate 5 to move to the left, so that the cylinder bottom abuts between the two clamping plates 5. The gear 706 is pulled upwards, so that the damping sleeve 704 and the square sleeve 710 slide damped on the square rod 709. At the same time, the gear 706 moves upwards to a position where it does not mesh with the arc-shaped internal gear ring 707. At this time, the gear 706 is not fixed. Through gear 706, rotating square sleeve 710, square rod 709 and a threaded rod 702, under the meshing transmission of four bevel gears 701, drive the upper and lower threaded rods 702 to rotate in opposite directions, and drive the front and rear threaded rods 702 to rotate in opposite directions. In turn, the four threaded rods 702 drive the four grippers 703 to move inward synchronously, thereby clamping and centering the cylinder bottom, so that the cylinder bottom, rotating shaft 11 and clamping plate 5 are coaxially fixed, avoiding the cylinder bottom from deflecting and affecting the accuracy of flaw detection.

[0027] Furthermore, four elongated holes 705 are provided on one side of the clamping plate 5, and four grippers 703 are slidably fitted into the corresponding elongated holes 705, which facilitates the guidance of the grippers 703 and makes their movement more stable.

[0028] Furthermore, a fixing plate 708 is fixedly connected to the top of the clamp 5, and an arc-shaped internal toothed ring 707 is fixedly connected to one side of the fixing plate 708, which facilitates the fixing of the arc-shaped internal toothed ring 707.

[0029] Furthermore, referring to Figures 1 and 2, the adjusting positioning mechanism 3 includes a drive motor 31 fixedly connected to one side of the gantry 2. An adjusting screw 34 is fixedly connected to the output shaft of the drive motor 31. A slide 32 is threaded onto the outer side of the adjusting screw 34. An electric push rod 36 is fixedly connected to the bottom of the slide 32. A mounting plate 37 is fixedly connected to the output shaft of the electric push rod 36. A laser emitter 38 is fixedly connected to the bottom of the mounting plate 37. An ultrasonic flaw detector 39 is fixedly connected to the bottom of the mounting plate 37.

[0030] The above scheme is adopted as follows: Based on the length of the cylinder bottom 6, the drive motor 31 drives the adjustment screw 34 to rotate, and the adjustment screw 34 drives the slide 32 and the ultrasonic flaw detector 39 to move laterally. The laser emitter 38 emits a laser. When the laser irradiates the weld position, the drive motor 31 is turned off. The distance between the ultrasonic flaw detector 39 and the weld can be adjusted by the electric push rod 36 so as to more accurately detect the flaw in the weld. During the flaw detection, the rotary motor 4 is started. The rotary motor 4 drives the two clamping plates 5 and the cylinder bottom to rotate, so that the entire weld of the cylinder bottom can be detected.

[0031] Furthermore, a support plate 35 is fixedly connected to the top inner wall of the gantry frame 2, and an adjusting screw 34 is rotatably connected to one side of the support plate 35. The same limiting rod 33 is fixedly connected between the support plate 35 and the gantry frame 2. The slide block 32 is slidably sleeved on the outside of the limiting rod 33, which facilitates the guiding and limiting of the slide block 32, making its movement more stable and smooth.

[0032] In this invention, during use, the cylinder bottom is placed in the placement groove 9. The lower cylinder 10 drives the placement groove 9 and the cylinder bottom to move upwards, coaxial with the clamping plate 5. Then, the upper cylinder 13 drives the moving plate 12 and the left clamping plate 5 to move to the left, so that the cylinder bottom abuts between the two clamping plates 5. The gear 706 is pulled upwards, causing the damping sleeve 704 and the square sleeve 710 to slide damped on the square rod 709. At the same time, the gear 706 moves upwards to a position where it does not mesh with the arc-shaped internal gear ring 707. At this time, the gear 706 is not fixed. Through the gear 706, the square sleeve 710, the square rod 709, and a threaded rod 702 are rotated. Under the meshing transmission of the four bevel gears 701, the upper and lower threaded rods 702 are driven to rotate in opposite directions, as are the front and rear threaded rods 702. Thus, the four threaded rods... 702 drives the four grippers 703 to move synchronously inward, thereby clamping and centering the cylinder bottom, making the cylinder bottom, rotating shaft 11, and clamping plate 5 coaxially fixed, preventing the cylinder bottom from deflecting and affecting the accuracy of flaw detection. According to the length of the cylinder bottom 6, the drive motor 31 drives the adjustment screw 34 to rotate, and the adjustment screw 34 drives the slide 32 and ultrasonic flaw detector 39 to move laterally. The laser emitter 38 emits laser light. When the laser shines on the weld position, the drive motor 31 is turned off, and the distance between the ultrasonic flaw detector 39 and the weld can be adjusted by the electric push rod 36 to perform more accurate flaw detection on the weld. During flaw detection, the rotary motor 4 is started, and the rotary motor 4 drives the two clamping plates 5 and the cylinder bottom to rotate, so that the entire weld of the cylinder bottom can be flaw detected.

Claims

1. A flaw detection device for the weld flaw detection of the cylinder barrel and cylinder bottom of a hydraulic cylinder, characterized in that, The system includes a base (1), a gantry frame (2) fixedly connected to the top of the base (1), an ultrasonic flaw detector (39) and two clamping plates (5) for weld flaw detection are installed inside the gantry frame (2), an adjustment and positioning mechanism (3) is provided between the gantry frame (2) and the ultrasonic flaw detector (39), a lower cylinder (10) is fixedly connected to the top of the base (1), a placement groove (9) is fixedly connected to the output shaft of the lower cylinder (10), a cylinder barrel (8) of a hydraulic cylinder is movably placed in the placement groove (9), and one side of the cylinder barrel (8) The bottom of the cylinder (6) is welded on. A rotary motor (4) is fixedly connected to one side of the gantry (2). An upper cylinder (13) is fixedly connected to the other side of the gantry (2). A moving plate (12) is fixedly connected to the output shaft of the upper cylinder (13). A rotating shaft (11) is rotatably connected to one side of the moving plate (12). Two clamping plates (5) are fixedly connected to one end of the rotating shaft (11) and the output shaft of the rotary motor (4). A clamping and centering fixing mechanism (7) is provided on the clamping plate (5). A controller (15) is fixedly connected to one side of the gantry (2).

2. The hydraulic cylinder barrel and cylinder bottom welding flaw detection device according to claim 1, characterized in that, Two guide rods (14) are slidably arranged on the other side of the gantry (2), and the moving plate (12) is fixedly connected to one end of the two guide rods (14).

3. The hydraulic cylinder barrel bottom welding inspection device according to claim 1, characterized in that, The clamping and centering fixing mechanism (7) includes threaded rods (702) rotatably connected to the inner walls of the clamping plate (5). Each of the four threaded rods (702) is fixedly connected to a bevel gear (701) at one end close to each other. Two adjacent bevel gears (701) mesh with each other. The outer thread of the threaded rod (702) is fitted with a clamping claw (703).

4. The hydraulic cylinder barrel bottom welding inspection device according to claim 3, characterized in that, The clamp (5) has four elongated holes (705) on one side, and four grippers (703) are slidably fitted into the corresponding elongated holes (705).

5. The hydraulic cylinder barrel bottom welding inspection device according to claim 3, characterized in that, A square rod (709) is fixedly connected to the top of the threaded rod (702) at the top. An arc-shaped internal gear ring (707) is fixedly connected to the top of the chuck (5). A square sleeve (710) is slidably sleeved on the outer side of the square rod (709). A gear (706) is fixedly connected to the top of the square sleeve (710). The gear (706) meshes with the arc-shaped internal gear ring (707). A damping sleeve (704) is fixedly sleeved inside the square rod (709). The square rod (709) is damped and slidably sleeved inside the damping sleeve (704).

6. The hydraulic cylinder barrel and cylinder bottom weld flaw detection device according to claim 5, characterized in that, The top of the clamp (5) is fixedly connected to a fixing plate (708), and the arc-shaped internal toothed ring (707) is fixedly connected to one side of the fixing plate (708).

7. The hydraulic cylinder barrel bottom welding inspection device according to claim 1, characterized in that, The adjustment and positioning mechanism (3) includes a drive motor (31) fixedly connected to one side of the gantry (2). An adjustment screw (34) is fixedly connected to the output shaft of the drive motor (31). A slide (32) is threaded on the outer side of the adjustment screw (34). An electric push rod (36) is fixedly connected to the bottom of the slide (32). A mounting plate (37) is fixedly connected to the output shaft of the electric push rod (36). A laser emitter (38) is fixedly connected to the bottom of the mounting plate (37). An ultrasonic flaw detector (39) is fixedly connected to the bottom of the mounting plate (37).

8. The hydraulic cylinder barrel bottom welding inspection device according to claim 7, characterized in that, A support plate (35) is fixedly connected to the top inner wall of the gantry frame (2). The adjusting screw (34) is rotatably connected to one side of the support plate (35). The same limiting rod (33) is fixedly connected between the support plate (35) and the gantry frame (2). The slide block (32) is slidably sleeved on the outside of the limiting rod (33).

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