Air ultrasonic testing system and testing method for composite material cylinder parts

Abstract

The invention relates to the field of aviation detection technology, and specifically discloses an air ultrasonic detection system and a detection method for composite material cylinder parts. The system comprises a left support, a left track base, a middle support, a right track base, a left roller support, a right roller support and a right support in sequence. An inner auxiliary shaft clamping seat is arranged on the upper part of the left support, an inner scanning shaft is fixed on one end of the inner auxiliary shaft clamping seat close to the middle support, an inner detection head and an outer detection head clamped on the middle support are arranged in sequence directly below the inner scanning shaft, an outer scanning shaft is arranged directly below the inspected workpiece, an auxiliary shaft support is arranged on the upper part of the right support, the auxiliary shaft support clamps the auxiliary shaft, and a motion control system and an ultrasonic imaging system are externally connected to the system; the system can automatically display the horizontal and sound path distances, and detect the internal quality of the shell in a fully automatic running state; it can automatically record and automatically image, and intuitively reflect the quality status of the inside of the workpiece in the form of a color map.

Description

Technical Field

[0001] The present invention relates to the field of aviation detection technology, and specifically discloses an air ultrasonic detection system and a detection method for composite material cylinder parts, and in particular relates to an ultrasonic automatic detection system and a detection method for composite material cylinder parts in the formation of a small-diameter fiber-wound shell. Background Art

[0002] At present, the inspection of small-diameter fiber-wound shells adopts manual internal and external inspection, that is, one person holds the detection head inside the workpiece, and the other person holds the detection head outside, and the workpiece is inspected by sending and receiving one by one.

[0003] Manual internal and external inspection is not only slow, inconvenient, inefficient, relatively low in accuracy, and poor in traceability, but also has a pungent odor that is harmful to human health. An effective means is urgently needed to detect quality problems of such products. Summary of the invention

[0004] In view of this, in order to solve the problems of low detection efficiency, low detection accuracy, inconvenient operation and failure to meet actual production detection needs, the present invention provides an air ultrasonic detection system and method for composite cylindrical parts in order to solve the problems of low detection efficiency, low detection accuracy, inconvenient operation and failure to meet actual production detection needs.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The air ultrasonic detection system for composite material cylinder parts adopts an air-coupled ultrasonic system, which includes a left support, a left track base, a middle support, a left anti-stringing mechanism located in front of the middle support, a right track base, a left roller support, a right roller support, a right support and a right anti-stringing mechanism located in front of the right support. An inner auxiliary shaft clamping seat is arranged on the upper part of the left support, an inner scanning shaft is fixed on the end of the inner auxiliary shaft clamping seat close to the middle support, and the inner scanning shaft is extended and fixed on the inner scanning shaft support arranged on the upper part of the middle support, an inner detection head and an outer detection head clamped on the middle support are arranged in sequence directly below the inner scanning shaft, the left roller support and the right roller support are used to place the inspected workpiece, an outer scanning shaft used in conjunction with the outer detection head is arranged directly below the inspected workpiece, an auxiliary shaft support is arranged on the upper part of the right support, the auxiliary shaft support clamps the auxiliary shaft, and a transmitting probe frame and a moving mechanism for fixing the inner detection head are arranged in the inspected workpiece;

[0007] The air-coupled ultrasonic system is externally connected to a motion control system and an ultrasonic imaging system.

[0008] The working principle and beneficial effects of this solution are: through the motion control system, the air-coupled ultrasonic system adjusts the movement in the four directions of X, Y, Z, and R, and can automatically display the horizontal and sound path distances. In the fully automatic operation state, the quality of composite cylindrical parts can be tested; through the ultrasonic imaging system, it can automatically record and automatically image, and intuitively reflect the quality status of the workpiece in the form of color images. The imaging software can calculate the area of ​​the defect and provide a basis for the determination of the internal quality of the workpiece.

[0009] Furthermore, the bottoms of the left support, the middle support and the right support are all provided with pulleys adapted to the left track base and the right track base. Beneficial effect: The left support, the middle support and the right support are convenient to move.

[0010] Furthermore, the transmitting probe holder adopts a through-shaft design, and the through-shaft adopts a multi-section design, with sections of different sizes made according to the classification of the inspected workpiece; the through-shaft positioning adopts a machine tool ejector structure. Beneficial effects: The through-shaft adopts a multi-section design to improve the rigidity of the through-shaft, and adopts a machine tool ejector structure to facilitate precise positioning.

[0011] Furthermore, the inner detection head and the outer detection head are driven along the axial motion axis of the inspected workpiece by a gear structure to eliminate backlash. Beneficial effect: Through program-controlled synchronous motion, the inner detection head and the outer detection head are always kept on the same axis.

[0012] Furthermore, the front ends of the inner detection head and the outer detection head are both provided with anti-collision devices. Beneficial effect: protecting the workpiece to be inspected and the probe.

[0013] Furthermore, the left anti-stringing mechanism and the right anti-stringing mechanism are both pressed against and locked at both ends of the inspected workpiece by adjusting the angles of the front rollers.

[0014] Furthermore, the left roller support and the right roller support move along the length direction of the right base of the track using a gear rack structure; the left roller support and the right roller support move along the width direction of the right base of the track using a worm gear reducer with a lead screw for self-locking.

[0015] Furthermore, the rollers of the left roller support and the right roller support are both wheels with non-metallic surfaces.

[0016] The detection method of the air ultrasonic detection system for composite material cylinder parts includes the following steps:

[0017] S1: Start the system and complete self-test;

[0018] S2: According to the condition of the inspected workpiece, the left roller support and the right roller support simultaneously adjust the X-axis distance between them and the Y-axis distance between the rollers of the left roller support and the right roller support, and the inspected workpiece is hoisted and placed on the left roller support and the right roller support;

[0019] S3: Adjust the left and right anti-sequence devices close to the inspected workpiece and lock them. According to the center height of the inspected workpiece, the auxiliary axis support, the inner scanning axis support and the inner auxiliary axis clamping seat automatically adjust the height in the Z axis; at the same time, the support and the middle support move the inspected workpiece in the X axis. The middle support moves to 100mm away from the inspected workpiece and stops. The left support continues to move forward in the X axis. After the support frame of the inner probe completely enters the inspected workpiece, it rotates downward 90 degrees. The inner probe stops, the left support and the inner scanning axis continue to move forward, and the auxiliary axis moves along the X axis into the inspected workpiece to dock with the inner scanning axis and maintain parallelism. The inner scanning axis and the auxiliary axis move rightward in the X axis at the same time until the auxiliary axis returns to the starting point. The system automatically starts the inner detection head and the outer detection head to align the coaxial, and move to the right end of the inspected workpiece at the same time. The left roller support and the right roller support start to rotate in the R direction. The system automatically starts the inner detection head and the outer detection head to start moving detection from right to left in the X axis.

[0020] S4: After the inspection is completed, the rollers of the left and right roller supports stop rotating, the inner detection head rotates to keep it horizontal and motionless with the inner scanning axis, the left support, the inner scanning axis and the auxiliary axis simultaneously return in the X-axis direction to 4.5 meters from the original stop point of the inner scanning axis, the auxiliary axis and the inner scanning axis separate and return to the starting point at the same time, the left support returns along the X-axis direction to the starting point, the inner scanning axis and the inner detection head completely separate from the inspected workpiece, and the inspected workpiece is removed.

[0021] Further, in step S3, when the length of the inspected workpiece is ≤4.5 meters, the auxiliary shaft keeps the origin unchanged, and the inner scanning shaft directly docks with the auxiliary shaft after passing through the inspected workpiece.

[0022] 1. The air ultrasonic detection system for composite cylindrical parts disclosed in the present invention adopts air-coupled ultrasonic spiral scanning or grid scanning, which can automatically display the horizontal and sound path distances. In a fully automatic operation state, the internal quality of the small-diameter fiber-wound shell is detected. The system has a one-button automatic scanning function, which can automatically record and automatically image, and intuitively reflect the internal quality status of the workpiece in the form of a color map.

[0023] 2. The air ultrasonic detection system for composite cylindrical parts disclosed in the present invention adopts air-coupled ultrasonic waves to detect the internal quality of small-diameter fiber-wound shells in a fully automatic operation state. It can achieve infinitely variable speeds, meet the detection requirements of different speeds, simplify the detection difficulty, and use external triggering to collect data to ensure that high-speed detection images are not deformed.

[0024] 3. The air ultrasonic detection system for composite material cylinder parts disclosed in the present invention adopts air-coupled ultrasonic wave and pulse echo transmission / reception detection, which can realize accurate penetration detection, solve the inconvenience of manual internal and external handheld detection, and solve the harm of gas to human body.

[0025] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure after a workpiece is placed in the air ultrasonic detection system for composite cylinder parts of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure before the workpiece is placed in the air ultrasonic detection system for composite material cylinder parts of the present invention.

[0028] The markings in the accompanying drawings are as follows: left support 1, left track base 2, inner scanning axis 3, middle support 4, left anti-stringing mechanism 5, inner detection head 6, outer detection head 7, right track base 8, left roller support 9, outer scanning axis 10, right roller support 11, right anti-stringing mechanism 12, right support 13, auxiliary axis 14, auxiliary axis support 15, inner scanning axis support 16, inner auxiliary axis clamping seat 17, and inspected workpiece 18. DETAILED DESCRIPTION

[0029] The following is further described in detail through specific implementation methods:

[0030] Example

[0031] like Figure 1 , Figure 2The air ultrasonic detection system for composite cylindrical parts shown in the figure adopts an air-coupled ultrasonic system, which includes a left support 1, a left track base 2, a middle support 4, a left anti-stringing mechanism 5 located in front of the middle support 4, a right track base 8, a left roller support 9, a right roller support 11, a right support 13 and a right anti-stringing mechanism 12 located in front of the right support 13. An inner auxiliary shaft 14 clamping seat is arranged on the upper part of the left support 1, and an inner scanning shaft 3 is fixed at one end of the inner auxiliary shaft 14 clamping seat close to the middle support 4, and the inner scanning shaft 3 is extended and fixed on the inner scanning shaft 3 support arranged on the upper part of the middle support 4. An inner detection head 6 and an outer detection head 7 clamped on the middle support 4 are arranged in sequence directly below the inner scanning shaft 3. The left roller support 9 and the right roller support 11 are placed on the workpiece 1 to be inspected. 8. An external scanning shaft 10 used in conjunction with the external detection head 7 is arranged directly below the inspected workpiece 18, an auxiliary shaft 14 support is arranged on the upper part of the right support 13, and the auxiliary shaft 14 support clamps the auxiliary shaft 14. A transmitting probe frame and a motion mechanism for fixing the internal detection head 6 are arranged inside the inspected workpiece 18; the air-coupled ultrasonic system is externally connected to a motion control system and an ultrasonic imaging system; through the motion control system, the air-coupled ultrasonic system adjusts and moves along the four directions of X, Y, Z, and R respectively, and can automatically display the horizontal and sound path distances. In the fully automatic operation state, the quality of composite material cylinder parts is detected; through the ultrasonic imaging system, it can automatically record and automatically image, and intuitively reflect the quality status of the workpiece in the form of a color map. The imaging software can calculate the area of ​​the defect and provide a basis for the determination of the internal quality of the workpiece.

[0032] The bottom of the left support 1, the middle support 4 and the right support 13 are all provided with pulleys compatible with the left base 2 of the track and the right base 8 of the track, so as to facilitate the movement of the left support 1, the middle support 4 and the right support 13; the left roller support 9 and the right roller support 11 move along the length direction of the right base 8 of the track by adopting a gear rack structure; the left roller support 9 and the right roller support 11 move along the width direction of the right base 8 of the track by adopting a worm gear reducer with a lead screw for self-locking; the rollers of the left roller support 9 and the right roller support 11 are both wheels with non-metallic surfaces.

[0033] The transmitting probe holder adopts an interlaced shaft design, and the interlaced shaft adopts a multi-section design. Different sized sections are made according to the classification of the inspected workpiece 18; the interlaced shaft positioning adopts a machine tool ejector structure, and the interlaced shaft adopts a multi-section design to improve the rigidity of the interlaced shaft, and adopts a machine tool ejector structure to facilitate precise positioning.

[0034] Both the inner detection head 6 and the outer detection head 7 are driven along the axial motion axis of the inspected workpiece 18 by a gear structure with clearance elimination, and the synchronous movement is controlled by a program. The inner detection head 6 and the outer detection head 7 always remain on the same axis. The front ends of the inner detection head 6 and the outer detection head 7 are provided with anti-collision devices to protect the inspected workpiece 18 and the probes.

[0035] The left anti-stringing mechanism 5 and the right anti-stringing mechanism 12 are both pressed against the two ends of the inspected workpiece 18 and locked by adjusting the angles of the front rollers.

[0036] The detection method of the composite material cylinder part air ultrasonic detection system comprises the following steps:

[0037] S1: Turn on the system and enter the system self-check after startup. After the self-check is completed, if there is a fault, the system will give the cause of the fault. After correcting the fault, the system will be normal. Click the start button.

[0038] S2: All moving parts in the system return to the set 0-point position, wherein the left roller support 9 and the right roller support 11 automatically adjust the X-axial distance between them according to the length of the workpiece 18 to be inspected. At the same time, the left roller support 9 and the right roller support 11 automatically adjust the Y-axial distance between the rollers, and the workpiece 18 to be inspected is hoisted and placed on the left roller support 9 and the right roller support 11.

[0039] S3: Adjust the left anti-string mechanism 5 and the right anti-string mechanism 12 to be close to the two ends of the inspected workpiece, adjust the angle of the front rollers of the left anti-string mechanism 5 and the right anti-string mechanism 12 and make them close to the two end surfaces of the inspected workpiece 18 and lock them to prevent movement. The auxiliary shaft support 15, the inner scanning shaft support 16, and the middle scanning shaft clamping seat 17 are adjusted according to the center height of the inspected workpiece 18. The system automatically adjusts the height in the Z axis to make the inner scanning shaft 3 and the auxiliary shaft 14 coaxial with the inspected workpiece 18, and the inner detection head 6 and the inner scanning shaft 3 remain horizontal. The left support 1 and the middle support 4 move the inspected workpiece 18 in the X axis at the same time. The middle support 4 moves to the inspected workpiece 18 at a distance of 100mm and stops. The left support 1 continues to move forward in the X axis and rotates downward after the support frame of the inner detection head 6 completely enters the inspected workpiece. 90 degrees, the inner detection head 6 stops, the left support 1 and the inner scanning axis 3 continue to move forward 4.5 meters, the auxiliary axis 14 moves along the X-axis toward the inspected workpiece 18 and docks with the inner scanning axis 3 to maintain parallelism, the inner scanning axis 3 and the auxiliary axis 14 move right along the X-axis at the same time until the auxiliary axis 14 returns to the starting point, the system automatically starts the inner detection head 6 and the outer detection head 7 to align the coaxial, and move to the right end of the inspected workpiece 18 at the same time, the left roller support 9 and the right roller support 11 start to rotate along the R direction, the system automatically starts the inner detection head 6 and the outer detection head 7 to start X-axis movement detection from right to left; when the length of the inspected workpiece 18 is ≤4.5 meters, the auxiliary axis 14 keeps the origin and does not move, the inner scanning axis 3 passes through the inspected workpiece and directly docks with the auxiliary axis 14.

[0040] S4: After the inspection is completed, the rollers of the left roller support 9 and the right roller support 11 stop rotating, the inner detection head 6 rotates to keep it horizontal with the inner scanning axis 3 and remains motionless, the left support 1, the inner scanning axis 3 and the auxiliary axis 14 simultaneously return in the X-axis direction to 4.5 meters from the original stop point of the inner scanning axis 3, the auxiliary axis 14 and the inner scanning axis 3 separate and return to the starting point at the same time, the left support 1 returns along the X-axis direction to the starting point, the inner scanning axis 3 and the inner detection head 6 completely separate from the inspected workpiece 18, and the inspected workpiece 18 is unloaded.

[0041] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the present invention.

Claims

1. An air ultrasonic detection system for composite cylinder parts, characterized by: An air-coupled ultrasonic system is adopted, which includes a left support, a left track base, a middle support, a left anti-stringing mechanism located in front of the middle support, a right track base, a left roller support, a right roller support, a right support and a right anti-stringing mechanism located in front of the right support, wherein an inner auxiliary shaft clamping seat is arranged on the upper part of the left support, an inner scanning shaft is fixed to one end of the inner auxiliary shaft clamping seat close to the middle support, and the inner scanning shaft is extended and fixed on the inner scanning shaft support arranged on the upper part of the middle support, an inner detection head and an outer detection head clamped on the middle support are arranged in sequence directly below the inner scanning shaft, a workpiece to be inspected is placed on the left roller support and the right roller support, an outer scanning shaft used in conjunction with the outer detection head is arranged directly below the workpiece to be inspected, an auxiliary shaft support is arranged on the upper part of the right support, the auxiliary shaft support clamps the auxiliary shaft, and a transmitting probe frame and a motion mechanism for fixing the inner detection head are arranged in the workpiece to be inspected; the air-coupled ultrasonic system is externally connected to a motion control system and an ultrasonic imaging system; The bottoms of the left support, the middle support and the right support are all provided with pulleys adapted to the left track base and the right track base; The transmitting probe frame adopts an interlaced shaft design, and the interlaced shaft adopts a multi-section design, and has sections of different sizes according to the classification of the inspected workpiece; The interlaced axis positioning adopts the machine tool ejector structure; The inner detection head and the outer detection head are both driven along the axial motion axis of the inspected workpiece by adopting a gear structure to eliminate backlash; The front ends of the inner detection head and the outer detection head are both provided with anti-collision devices; The left anti-string mechanism and the right anti-string mechanism are both pressed against and locked at both ends of the inspected workpiece by adjusting the angles of the front rollers.

2. The air ultrasonic detection system for composite cylinder parts according to claim 1 is characterized in that The left roller support and the right roller support move along the length direction of the right base of the track using a gear rack structure; the left roller support and the right roller support move along the width direction of the right base of the track using a worm gear reducer with a lead screw for self-locking.

3. The air ultrasonic detection system for composite cylinder parts according to claim 2 is characterized in that The rollers of the left roller support and the right roller support are both wheels with non-metallic surfaces.

4. The detection method of the composite material cylinder parts air ultrasonic detection system according to claim 1 is characterized in that: The following steps are involved: S1: Start the system and complete self-test; S2: According to the condition of the inspected workpiece, the left roller support and the right roller support simultaneously adjust the X-axis distance between them and the Y-axis distance between the rollers of the left roller support and the right roller support, and the inspected workpiece is hoisted and placed on the left roller support and the right roller support; S3: Adjust the left and right anti-sequence devices close to the inspected workpiece and lock them. According to the center height of the inspected workpiece, the auxiliary axis support, the inner scanning axis support and the inner auxiliary axis clamping seat automatically adjust the height in the Z axis; at the same time, the support and the middle support move the inspected workpiece in the X axis. The middle support moves to 100mm away from the inspected workpiece and stops. The left support continues to move forward in the X axis. After the support frame of the inner probe completely enters the inspected workpiece, it rotates downward 90 degrees. The inner probe stops, the left support and the inner scanning axis continue to move forward, and the auxiliary axis moves along the X axis into the inspected workpiece to dock with the inner scanning axis and maintain parallelism. The inner scanning axis and the auxiliary axis move rightward in the X axis at the same time until the auxiliary axis returns to the starting point. The system automatically starts the inner detection head and the outer detection head to align the coaxial, and move to the right end of the inspected workpiece at the same time. The left roller support and the right roller support start to rotate in the R direction. The system automatically starts the inner detection head and the outer detection head to start moving detection from right to left in the X axis. S4: After the inspection is completed, the rollers of the left and right roller supports stop rotating, the inner detection head rotates to keep it horizontal and motionless with the inner scanning axis, the left support, the inner scanning axis and the auxiliary axis simultaneously return in the X-axis direction to 4.5 meters from the original stop point of the inner scanning axis, the auxiliary axis and the inner scanning axis separate and return to the starting point at the same time, the left support returns along the X-axis direction to the starting point, the inner scanning axis and the inner detection head completely separate from the inspected workpiece, and the inspected workpiece is removed.

5. The detection method of the composite material cylinder parts air ultrasonic detection system according to claim 4 is characterized in that In step S3, when the length of the inspected workpiece is ≤4.5 meters, the auxiliary shaft keeps the origin stationary, and the inner scanning shaft directly docks with the auxiliary shaft after passing through the inspected workpiece.

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