Mechanical structure fatigue damage detection device

Abstract

The utility model discloses a mechanical structure fatigue damage detection device, and particularly relates to the technical field of mechanical structure detection, the mechanical structure fatigue damage detection device comprises a bottom plate, the lower end of the bottom plate is fixedly connected with a support frame, the right side of the rear part of the upper end of the bottom plate is fixedly connected with a detector display, and the left side of the middle part of the upper end of the bottom plate is fixedly connected with a placing plate; the left side and the right side of the middle of the upper end of the bottom plate are fixedly connected with a clamping fixing assembly, and a lifting detection assembly is installed on the left side of the front portion of the upper end of the bottom plate. According to the fatigue damage detection device for the mechanical structure, through the designed clamping and fixing assembly, the mechanical structure needing to be detected can be clamped and fixed, it can be ensured that the mechanical structure cannot move or shake in the detection process, and therefore detection result deviation or error caused by instability is avoided; the detection reliability is improved, and the detection data of the device is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical structure detection technical field, especially mechanical structure fatigue damage detection device. BACKGROUND

[0002] Mechanical structure is the whole that a plurality of parts are connected by connecting piece, and is used for realizing the device or machine of specific function.

[0003] Mechanical structure fatigue damage refers to the process that the material performance in mechanical structure gradually deteriorates under the action of cyclic load or repeated stress, and eventually leads to structural failure.

[0004] The main cause of mechanical structure fatigue damage is cyclic load or repeated stress. These loads or stresses can be mechanical stress, thermal stress, stress in corrosive medium, etc. Under the action of cyclic load, the material in mechanical structure will occur local plastic deformation. This deformation is permanent and will accumulate with the increase of cycle number. When accumulated to a certain extent, cracks will be generated inside the material. These cracks will gradually expand, eventually leading to structural failure.

[0005] Fatigue damage detection device can not only be used to evaluate the fatigue damage degree of existing mechanical structure, but also provide data support for the design and production of mechanical structure. These data can be used to optimize the design and production process of mechanical structure, improve the quality and performance of products, so a mechanical structure fatigue damage detection device is needed.

[0006] Chinese patent publication No. CN216791610U discloses a kind of mechanical structure fatigue damage detection equipment, including placement table, the surface of placement table left and right sides are equipped with fixed plate, the front and back sides of fixed plate are fixedly connected with first mounting bracket, the inner side of first mounting bracket is equipped with second mounting bracket, second mounting bracket is fixedly connected to the surface of fixed plate, the end of second mounting bracket away from fixed plate is rotatably connected with rotating gear, the end of first mounting bracket away from fixed plate is rotatably connected with rotating rod, the surface of rotating rod is equipped with sector plate, the surface of sector plate is equipped with a plurality of racks that are evenly distributed at equal intervals, rack and rotating gear are mutually engaged.

[0007] The above patent still has the following shortcomings in the implementation process:

[0008] The above patent fixes mechanical structure on placement table, and then detects fatigue damage by detection box. Although this can achieve the purpose of detection, it does not adjust the detection box, which may cause errors in the detection data and reduce the accuracy of the detection data. UTILITY MODEL CONTENTS

[0009] The utility model discloses a mechanical structure fatigue damage detection device can effectively solve the problem that mechanical structure cannot be fixed when detecting fatigue damage.

[0010] To realize the above-mentioned purpose, the utility model takes the technical scheme for:

[0011] A kind of mechanical structure fatigue damage detection device, including bottom plate, the bottom plate lower end fixedly connected with support frame, the bottom plate upper end rear right side fixedly connected with detection instrument display, the bottom plate upper end middle left side fixedly connected with placing plate, the bottom plate upper end middle left side and right side are fixedly connected with clamping fixed component, the bottom plate upper end front left side is equipped with lifting detection component.

[0012] Preferably, the clamping fixed component includes a stepper motor and four fixed plates, the stepper motor is fixedly connected to the bottom plate upper end front right side, the stepper motor output end is fixedly connected with worm, four The fixed plate is fixedly connected to the left side and the right side of the bottom plate upper end front and rear respectively, the same side two fixed plates are rotatably connected with two transmission rods at the end close to each other, the same side two transmission rods outer surface front is fixedly connected with straight gear one, the same side two transmission rods outer surface middle is fixedly connected with clamping mechanism, the front end of two transmission rods in upper part penetrates the upper part of two fixed plates in front and extends outside, the transmission rod outer surface front edge of two transmission rods in upper part is fixedly connected with worm wheel.

[0013] Preferably, the worm is engaged with two worm wheels respectively.

[0014] Preferably, the same side two straight gears one are engaged.

[0015] Preferably, the clamping mechanism includes two rotating plates, two rotating plates are fixedly connected to the middle of two transmission rods outer surface respectively, two rotating plates left part are rotatably connected with push rod, two push rods left part are rotatably connected with arc plate, two arc plates left end are fixedly connected with clamping plate.

[0016] Preferably, the lifting detection component includes a sliding shell, the sliding shell is fixedly connected to the bottom plate upper end front left side, the sliding shell inner chamber is slidably connected with rack, the rack rear end upper part is fixedly connected with support plate, the support plate lower end rear middle side is installed with detection head, the sliding shell inner chamber upper part front side is rotatably connected with straight gear two, the straight gear two inner chamber is fixedly connected with rocker.

[0017] Preferably, the rack is engaged with the straight gear two, and the detection head is located directly above the placing plate.

[0018] Preferably, the rack is a ferrous rack, and the sliding shell has magnetism.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The clamping and fixing assembly is designed, the mechanical structure to be detected can be clamped and fixed, movement or shaking of the mechanical structure in the detection process can be ensured, deviation or error of the detection result caused by instability is avoided, the reliability of detection is improved, and the detection data of the device is more accurate.

[0021] The detector display and the detection head are designed, the mechanical structure can be ultrasonic detected, the ultrasonic detection has high resolution and deep penetration ability, fatigue damage such as a tiny crack and fatigue crack propagation in the mechanical structure can be accurately detected, and timely and accurate information for maintenance and repair of the mechanical structure is provided. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole structure schematic view of the utility model;

[0023] Figure 2 It is a whole structure schematic view of the utility model;

[0024] Figure 3 It is a clamping and fixing assembly structure schematic view of the utility model;

[0025] Figure 4 It is a clamping mechanism structure schematic view of the utility model;

[0026] Figure 5 It is a lifting detection assembly structure schematic view of the utility model.

[0027] In the drawing: 1, bottom plate; 2, detector display; 3, support frame; 4, placement plate; 5, clamping and fixing assembly; 6, lifting detection assembly; 51, stepping motor; 52, worm wheel; 53, worm; 54, straight gear one; 55, transmission rod; 56, fixed plate; 57, clamping mechanism; 571, rotating plate; 572, push rod; 573, arc plate; 574, clamping plate; 61, sliding shell; 62, detection head; 63, support plate; 64, rack; 65, straight gear two; 66, rocker. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0029] For example, Figure 1 And Figure 2As shown, a mechanical structure fatigue damage detection device, including the base plate 1, the lower end of the base plate 1 is fixedly connected with the support frame 3, the upper end of the base plate 1 is fixedly connected with the detector display 2 at the right side of the rear part, the upper end of the base plate 1 is fixedly connected with the placement plate 4 at the left side of the middle part, the upper end of the base plate 1 is fixedly connected with the clamping and fixing assembly 5 at the left side and the right side of the middle part, the upper end of the base plate 1 is installed with the lifting detection assembly 6 at the left side of the front part.

[0030] The device can be powered by an external power supply.

[0031] The detector display 2 and the detection head 62 in the lifting detection assembly 6 are integrated, and have a connecting line therebetween, so that the detection head 62 can transmit detection information to the detector display 2, the installation mode of the connecting line is a conventional operation in the prior art, which will not be described in detail herein, and it should be noted that the length of the connecting line should be relatively long to ensure that the lifting detection assembly 6 will not pull the detector display 2 when lifting.

[0032] In the above, the detector display 2 and the detection head 62 are ultrasonic flaw detection instruments, and the model is CUT-2000A.

[0033] In the above, the ultrasonic fatigue detection is based on the ultrasonic resonance principle, and a piezoelectric ceramic transducer is used to convert a high-frequency electrical signal into mechanical vibration, thereby generating a high-frequency vibration load in the sample, which can simulate the fatigue effect of the material in long-term use to evaluate its fatigue performance.

[0034] In the above, the mechanical structure to be subjected to fatigue damage detection is placed on the placement plate 4 installed on the upper end of the base plate 1, then the clamping and fixing assembly 5 is started to clamp and fix the mechanical structure, so that the mechanical structure can be stably placed on the placement plate 4, then the lifting detection assembly 6 is shaken to make it descend and adhere to the mechanical structure clamped by the clamping and fixing assembly 5 for detection, then the lifting detection assembly 6 transmits the detection information to the detector display 2, after detection is completed, the lifting detection assembly 6 is moved to the initial position, the clamping and fixing assembly 5 is controlled to release the clamping of the mechanical structure, the detected mechanical structure is taken out, the next mechanical structure to be detected is placed, and the above operation is repeated.

[0035] Further, in order to achieve the purpose of clamping and fixing the mechanical structure by the clamping and fixing assembly 5, reference can be made to Figure 3 and Figure 4The clamping and fixing assembly 5 comprises a stepping motor 51 and four fixing plates 56. The stepping motor 51 is fixedly connected to the front right side of the upper end of the bottom plate 1. The output end of the stepping motor 51 is fixedly connected with a worm 53. The four fixing plates 56 are fixedly connected to the left and right sides of the front and rear upper ends of the bottom plate 1. The ends of the two fixing plates 56 on the same side, which are close to each other, are rotatably connected with two transmission rods 55. The outer surfaces of the front parts of the two transmission rods 55 on the same side are fixedly connected with two straight gears I 54. The outer surfaces of the middle parts of the two transmission rods 55 on the same side are fixedly connected with a clamping mechanism 57. The front ends of the two transmission rods 55 on the upper part extend through the upper parts of the two fixing plates 56 on the front part and extend out of the outer part. The outer surfaces of the front edges of the two transmission rods 55 on the upper part are fixedly connected with two worm wheels 52.

[0036] The worm 53 is engaged with the two worm wheels 52.

[0037] The two straight gears I 54 on the same side are engaged.

[0038] The clamping mechanism 57 comprises two rotating plates 571. The two rotating plates 571 are fixedly connected to the outer surfaces of the middle parts of the two transmission rods 55. The left parts of the two rotating plates 571 are rotatably connected with two push rods 572. The left parts of the two push rods 572 are rotatably connected with two arc-shaped plates 573. The left ends of the two arc-shaped plates 573 are fixedly connected with a clamping plate 574.

[0039] When the stepping motor 51 is started to rotate, the stepping motor 51 drives the worm 53 to rotate through the shaft coupling. The worm wheel 52 transmits power to the worm wheel 52 through the engagement relationship with the worm wheel 52, and drives the worm wheel 52 to rotate. When the worm wheel 52 rotates, the transmission rod 55 connected with the worm wheel 52 rotates. When the transmission rod 55 on the upper part rotates, the straight gear I 54 connected with the transmission rod 55 on the outer surface rotates. The straight gear I 54 on the upper part drives the straight gear I 54 on the lower part to rotate through the engagement relationship. The straight gear I 54 on the lower part drives the transmission rod 55 connected with the straight gear I 54 to rotate. When the two transmission rods 55 on the same side rotate, the rotating plate 571 connected with the transmission rod 55 rotates. Through the power transmission of the two straight gears I 54, the rotating plate 571 on the upper part rotates counterclockwise, and the rotating plate 571 on the lower part rotates clockwise. When the rotating plate 571 rotates, the rotating plate 571 drives the push rod 572 to move towards the clamping plate 574 through the rotating connection relationship with the push rod 572 and the rotating connection relationship with the arc-shaped plate 573. The push rod 572 drives the arc-shaped plate 573 and the clamping plate 574 to move close to each other, so that the clamping plate 574 clamps the mechanical structure to be detected.

[0040] When it is needed to release the clamping state, the stepping motor 51 is only needed to be reversed.

[0041] Among them, through the adjustable clamping design, the device can be suitable for mechanical structures of different sizes, and the practicability of the device is improved.

[0042] Further, in order to realize the purpose of detecting the mechanical structure by the lifting detection assembly 6, referring to Figure 5 , the lifting detection assembly 6 comprises a sliding shell 61 fixedly connected to the front left side of the upper end of the bottom plate 1, a rack 64 slidably connected in the inner cavity of the sliding shell 61, a support plate 63 fixedly connected to the upper end of the rear end of the rack 64, a detection head 62 installed on the lower end of the rear middle side of the support plate 63, a straight gear two 65 rotatably connected to the upper front side of the inner cavity of the sliding shell 61, and a rocker 66 fixedly connected in the inner cavity of the straight gear two 65.

[0043] The rack 64 is engaged with the straight gear two 65, and the detection head 62 is located directly above the placement plate 4.

[0044] The rack 64 is an iron rack, and the sliding shell 61 has magnetism.

[0045] Among them, through the rocker 66, the rocker 66 rotates, and when the rocker 66 rotates, the straight gear two 65 rotates together, and the straight gear two 65 drives the rack 64 to slide downward in the inner cavity of the sliding shell 61 through the engagement relationship, and when the rack 64 slides downward, the support plate 63 slides downward together, and the detection head 62 is lowered to make the detection head 62 adhere to the mechanical structure to be detected, and then the detection information is transmitted to the detector display 2 to complete the fatigue damage detection of the mechanical structure.

[0046] Among them, because the rack 64 is an iron rack, and the sliding shell 61 has magnetism, the sliding shell 61 can attract the rack 64, so that when the rocker 66 is not rotated, the sliding shell 61 can fix the rack 64 in place, so that the rack 64 will not freely fall due to gravity, and the integrity of the device is improved.

[0047] It should be particularly pointed out that the specific installation mode and circuit connection mode and control method of the detector display 2, the stepping motor 51 and the detection head 62 used in the utility model belong to conventional design, and the utility model will not be described in detail.

[0048] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A mechanical structure fatigue damage detection device comprising a base plate (1), characterized in that: The bottom plate (1) lower end fixedly connected with support frame (3), the bottom plate (1) upper end rear right side fixedly connected with detector display (2), the bottom plate (1) upper end middle left side fixedly connected with the placement plate (4), the bottom plate (1) upper end middle left side and right side fixedly connected with clamping fixed component (5), the bottom plate (1) upper end front left side is installed lifting detection component (6).

2. The apparatus of claim 1, wherein: The clamping fixed component (5) includes stepper motor (51) and four fixed plates (56), the stepper motor (51) is fixedly connected to the bottom plate (1) upper end front right side, the stepper motor (51) output end fixedly connected with worm (53), four the fixed plate (56) is fixedly connected to the bottom plate (1) upper end front and rear left side and right side, the same side two fixed plate (56) are rotatably connected with two transmission rods (55) on the end close to each other, the same side two transmission rods (55) outer surface front are all fixedly connected with straight gear one (54), the same side two transmission rods (55) outer surface middle are all fixedly connected with clamping mechanism (57), two transmission rods (55) front end located in upper part are respectively penetrated through two fixed plates (56) located in front part upper part and extend outside, two transmission rods (55) outer surface front edge are all fixedly connected with worm gear (52).

3. The apparatus of claim 2, wherein: The worm (53) is engaged with two worm gears (52) respectively.

4. The apparatus of claim 2, wherein: The same side two straight gear one (54) are engaged.

5. The apparatus of claim 2, wherein: The clamping mechanism (57) includes two rotating plates (571), two rotating plates (571) are fixedly connected to the outer surface of two transmission rods (55) middle, two rotating plates (571) left are all rotatably connected with push rod (572), two push rods (572) left are all rotatably connected with arc plate (573), two arc plates (573) left ends are all fixedly connected with clamping plate (574).

6. The apparatus of claim 1, wherein: The lifting detection component (6) includes sliding shell (61), the sliding shell (61) is fixedly connected to the bottom plate (1) upper end front left side, the sliding shell (61) inner chamber is slidably connected with rack (64), the rack (64) rear end upper part is fixedly connected with support plate (63), the support plate (63) lower end rear middle side is installed detection head (62), the sliding shell (61) inner chamber upper part front side is rotatably connected with straight gear two (65), the straight gear two (65) inner chamber is fixedly connected with rocker (66).

7. The apparatus of claim 6, wherein: The rack (64) is engaged with the straight gear two (65), and the detection head (62) is located directly above the placement plate (4).

8. The apparatus of claim 6, wherein: The rack (64) is an iron rack, and the sliding shell (61) has magnetism.

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