Precise steel pipe bending detection device

Abstract

The invention relates to the technical field of bending degree detection devices, in particular to a precise steel pipe bending detection device which comprises a detection assembly and a supporting table for supporting a workpiece. The detection assembly comprises a supporting piece and a plurality of detection meters. The supporting piece is in a C shape so that the supporting piece can be arranged outside the workpiece in a sleeving mode and move relative to the workpiece. The plurality of detection meters are arranged on the supporting piece and are annularly distributed, so that a workpiece passes through the plurality of detection meters. When the precision steel pipe bending detection device is used, a workpiece to be detected is placed on the supporting table. And meanwhile, the workpiece passes through a plurality of detection meters. The supporting piece moves in the length direction of the workpiece, and then the multiple detection meters are driven to move along the workpiece. The detection meter can be a dial indicator or a dial indicator. In the process that the detection meter moves along the workpiece, if the workpiece is bent, the detection meter is driven to jump, and then the detection meter detects the bending degree.

Description

Technical Field

[0001] The present invention relates to the technical field of curvature detection devices, and more particularly, to a precision steel pipe bending detection device. Background Art

[0002] In the field of precision manufacturing, the geometric accuracy of rods and pipe fittings directly affects the performance and quality of the final product. Especially in industries such as aerospace, automotive manufacturing, precision instruments, and high-end equipment, even micron-level bending deformation may lead to assembly interference, uneven stress distribution, or functional failure. For example, in the fuel pipeline system of an aeroengine, slight bending of the pipe fittings may affect the stable transmission of fluids and even pose a leakage risk; in a precision mechanical transmission structure, the straightness deviation of the rod will exacerbate wear and reduce the equipment life. Therefore, curvature detection is a key link to ensure product reliability and process consistency.

[0003] Currently, the industrial measurement of the curvature of rods and pipe fittings mainly relies on the following methods: Manual inspection and contact measurement: Traditional methods usually use tools such as straight rulers, feeler gauges, or dial indicators for local measurement, relying on the experience of the operator for judgment. Although this method has a low cost, it is inefficient and difficult to achieve full-size inspection, and it is easy to introduce errors due to human factors. In addition, contact measurement (such as a profilometer) may cause elastic deformation of the measured part due to the probe pressure, affecting the accuracy of the measurement results.

[0004] Optical and non-contact measurement: In recent years, optical measurement devices such as laser scanners and coordinate measuring machines (CMMs) have been gradually applied to high-precision inspection. These technologies can obtain the three-dimensional topography data of the measured part with high precision, but the equipment is expensive, has strict requirements for the use environment (such as vibration prevention and constant temperature), and the measurement speed is slow, making it difficult to meet the requirements of rapid inspection on the production line.

[0005] Automated vision inspection: The inspection method based on machine vision collects images through a high-resolution camera and calculates the curvature in combination with image processing algorithms. This method has the advantages of non-contact and high efficiency, but still faces challenges in practical applications, such as measurement stability under complex lighting conditions, image distortion correction, and detection accuracy problems for high-reflection surfaces (such as metal pipe fittings).

[0006] Although existing technologies can meet some detection needs to a certain extent, there are still obvious deficiencies in the balance between speed, high precision and low cost. For example, traditional methods cannot adapt to large-scale online detection, and high-end optical equipment is difficult to popularize in ordinary industrial sites. Therefore, the development of a professional, efficient and easy-to-integrate curvature detection device is of great significance to improving manufacturing quality and reducing detection costs. In the future, the combination of intelligent sensors, deep learning algorithms and automated control technologies is expected to achieve more accurate and efficient curvature measurement solutions. Summary of the invention

[0007] The object of the present invention is to provide a precision steel pipe bending detection device, which can conveniently measure the bending degree of a rod or a pipe.

[0008] The embodiments of the present invention are implemented by the following technical solutions: A precision steel tube bending detection device comprises a detection component and a support table for supporting a workpiece; the detection component comprises a support member and a plurality of detection gauges; the support member is C-shaped so that the support member can be sleeved on the outside of the workpiece and move relative to the workpiece; a plurality of the detection gauges are arranged on the support member and distributed in a ring shape so that the workpiece can pass between the plurality of the detection gauges.

[0009] Furthermore, the support platform includes two support columns; it also includes a base; the two support columns are arranged opposite to each other and can be relatively moved on the base; the support columns are each provided with a clamping piece and the two clamping pieces are arranged opposite to each other so that the workpiece can be clamped and supported between the two clamping pieces; the clamping piece is provided with a conical positioning groove.

[0010] Furthermore, the jacking member is rotatably arranged on the support column; one of the jacking members is also transmission-connected to a rotating motor so that the jacking member can rotate.

[0011] Furthermore, it also includes a correction mechanism; the correction mechanism includes a slide and a pressure head connected to the slide; the slide is slidably arranged on the base and the sliding direction of the slide is parallel to the line connecting the two support columns; the pressure head is located directly above the line connecting the centers of the two tightening members; the pressure head is also equipped with a pushing device for driving the pressure head to rise and fall.

[0012] Furthermore, it also includes two supporting piles; the two supporting piles are slidably arranged on the base; the sliding direction of the two supporting piles is parallel to the sliding direction of the sliding seat; the supporting piles are located directly below the line connecting the centers of the two tightening members.

[0013] Furthermore, the supporting pile comprises a hydraulic cylinder and a top block; the top block is arranged on the top of the hydraulic cylinder.

[0014] Further, the support member is provided with a strip-shaped hole communicating its two ends; further comprising a plurality of adjusting tubes passing through the strip-shaped hole; the outer wall of the adjusting tube is provided with threads and two locking nuts are arranged in cooperation with the support member to clamp the support member by the two locking nuts; the inspection gauge passes through the inside of the adjusting tube and is connected to the adjusting tube.

[0015] Further, an opening is provided at the top of the support member to enable the workpiece to enter and exit the support member through the opening; at least 4 inspection gauges are provided.

[0016] Further, the support member is provided with a support base so that the support member is supported on the base through the support base; the support base is slidably arranged on the base; the sliding direction of the support base is parallel to the sliding direction of the sliding seat.

[0017] Further, the inspection gauge is a dial indicator; a ball is provided at the tip of the dial indicator.

[0018] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: When the precision steel pipe bending detection device of the present invention is used, the workpiece to be detected is placed on the support table. At the same time, the workpiece is made to pass between a plurality of inspection gauges. The support member moves along the length direction of the workpiece, thereby driving a plurality of inspection gauges to move along the workpiece. The inspection gauge can be a dial indicator or a micrometer. During the process of the inspection gauge moving along the workpiece, if the workpiece is bent, it will drive the inspection gauge to jump, thereby enabling the inspection gauge to detect the degree of bending.

[0019] In practice, when the inspection gauge moves along the workpiece, the jumping degree of each position where it passes through the workpiece is recorded. A plurality of inspection gauges are distributed around the workpiece, and thus the jumping conditions of multiple positions in the circumferential direction of the workpiece can be detected. At any length of the workpiece, the data detected by a plurality of inspection gauges are integrated to obtain the central position of the workpiece at this length. The connection line formed by connecting the central positions of the workpiece at each length is the length line of the workpiece. If the workpiece is bent, its length line will also be bent at the corresponding position. The bending position and the degree of bending of the rod or pipe fitting can be conveniently measured.

[0020] The relative movement of the two support columns can loosen or clamp the workpiece between them. Thereby facilitating loading and unloading. The tightening member is provided with a conical positioning groove so that after one end of the workpiece enters the positioning groove, it will be concentric with the central position of the tightening member under the guidance of the positioning groove. Thereby determining the central position of the workpiece. So that a plurality of inspection gauges are all based on this center line for detection.

[0021] The pressing member is rotatably arranged on the support column, so that the workpiece can rotate after being clamped between the two pressing members. By arranging a rotating motor on one of the pressing members, the workpiece can be rotated driven by the rotating motor. The rotation of the workpiece enables the inspection gauge to detect the runout at various positions in the circumferential direction of the workpiece, and further enables the workpiece to be detected at several positions in the circumferential direction by a plurality of inspection gauges at each length position. Furthermore, there are more monitoring points at each length position of the workpiece, and the detection result is more accurate.

[0022] When it is detected that the workpiece is bent at a certain position, the two support columns can be moved to both ends of the bent position and support the lower part of the workpiece. Subsequently, the pressing head moves to the bent position and is pushed downward by the pushing device to squeeze the workpiece, so that the bent part of the workpiece is straightened. The rotation of the pressing member can make the bent part of the workpiece bend upward, which is convenient for the pressing head to squeeze it downward for correction.

[0023] The support member is provided with a strip-shaped hole, so that the adjusting pipe can be at any position in the strip-shaped hole. After the position of the adjusting pipe is adjusted, the adjusting pipe can be fixed in the strip-shaped hole by two locking nuts. Furthermore, the inspection gauge connected to the adjusting pipe is fixed to the support member. This enables the position of the inspection gauge to be adjusted to any position as required. It also enables the number of adjusting gauges to be increased or decreased as required.

[0024] The workpiece is generally cylindrical. By detecting three points on the surface with three inspection gauges, the center position of the workpiece can be calculated according to the positions of the three points. In order to reduce errors, at least 4 inspection gauges are set. After the results are detected by a plurality of inspection gauges, the detection data of the inspection gauges with relatively large differences are removed, so as to better eliminate errors. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the precision steel pipe bending detection device of the present invention.

[0026] Figure 2 It is a side view of the precision steel pipe bending detection device of the present invention.

[0027] Figure 3 It is a schematic diagram of the detection component.

[0028] Figure 4 It is a schematic diagram of the support member.

[0029] Figure 5 It is a schematic diagram of the cooperation between the workpiece and the pressing member.

[0030] Reference numerals: 1 - support member, 2 - workpiece, 3 - inspection gauge, 4 - support column, 5 - base, 6 - pressing member, 7 - sliding seat, 8 - pressing head, 9 - pushing device, 10 - support seat, 11 - hydraulic cylinder, 12 - top block, 13 - strip-shaped hole, 14 - adjusting pipe, 15 - locking nut, 16 - opening, 17 - rotating motor. Detailed implementation manner

[0031] As Figures 1 - 5 shown, this embodiment provides a precision steel pipe bending detection device, which includes a detection component and a support table for supporting the workpiece. The detection component includes a support member 1 and a plurality of inspection gauges. The support member 1 is in a C shape so that the support member 1 can be sleeved outside the workpiece and move relative to the workpiece. The plurality of inspection gauges are arranged on the support member 1 and are distributed in a ring shape so that the workpiece can pass between the plurality of inspection gauges.

[0032] When the precision steel pipe bending detection device of the present invention is in use, the workpiece to be detected is placed on the support table. At the same time, the workpiece is made to pass between the plurality of inspection gauges. The support member 1 moves along the length direction of the workpiece, thereby driving the plurality of inspection gauges to move along the workpiece. The inspection gauge can be a dial indicator or a micrometer. During the process of the inspection gauge moving along the workpiece, if the workpiece is bent, its center line will shift in one direction. As a result, the reading of the inspection gauge changes. This will cause the inspection gauge to jump, and thus the inspection gauge can detect the degree of bending.

[0033] In practice, when the inspection gauge moves along the workpiece, the runout degree at each position where it passes through the workpiece is recorded. A number of inspection gauges are distributed around the workpiece, so that the runout conditions at multiple positions in the circumferential direction of the workpiece can be detected. At any length of the workpiece, the data detected by a number of inspection gauges are integrated to obtain the central position of the workpiece at that length. A bow is generally cylindrical. According to geometric principles, the center position of a circle can be calculated through any three points on the circumference. The connecting line formed by connecting the center positions of the workpiece at each length is the length line of the workpiece. If the workpiece is bent, its length line will also be bent at the corresponding position. Thus, the bending position and the bending degree of the rod or pipe fitting can be conveniently measured. At the same time, the three-dimensional data of the workpiece can also be measured and recorded in this way. These parameters can provide a reference for the later processing of the workpiece. This is more beneficial to the processing of the workpiece. At the same time, in this embodiment, the bending degree is determined by the length line fitted by the workpiece. That is to say, as long as a number of inspection gauges can move from one end of the workpiece to the other end, the external shape structure of the workpiece can be fitted. Then, the bending degree and the bending position of the workpiece can be judged. And it is not necessary for the workpiece to maintain a specific position. If only one inspection gauge is used to detect the bending degree of the workpiece, since the inspection gauge moves along a straight line, if the length line of the workpiece is not parallel to the moving direction of the inspection gauge, the distance between the workpiece and the inspection gauge will gradually become larger or smaller during the movement of the inspection gauge along the workpiece. As a result, the detected result will have an obvious error due to the non-parallel moving direction of the workpiece and the inspection gauge.

[0034] In order to facilitate the recording of the detection data of the inspection gauge, the inspection gauge can be electronic. It can record the detected data in real time. Thus, it is convenient to analyze the characteristics of the workpiece later.

[0035] In this embodiment, the support table includes two support columns. It also includes a base. The two support columns are arranged oppositely and are arranged on the base so as to be able to move relative to each other. Specifically, the base can be provided with a dovetail-shaped chute. The bottom of the support column is provided with a dovetail-shaped slider that fits into the chute. So that the slider is embedded inside the chute and can slide relative to the chute. The support columns are both provided with tightening members and the two tightening members are arranged oppositely, so that the workpiece can be clamped and supported between the two tightening members. The tightening member is provided with a conical positioning groove.

[0036] When the two support columns move relative to each other, the workpiece between them can be loosened or clamped. Thus, it is convenient for loading and unloading. The tightening member is provided with a conical positioning groove, so that after one end of the workpiece enters the positioning groove, it will be concentric with the central position of the tightening member under the guidance of the positioning groove. Thus, the central position of the workpiece is determined. So that a number of inspection gauges are all based on this center line for detection. The detection effect is better.

[0037] To drive the sliding of the support column, a hydraulic cylinder 11 or an electric push rod can be provided corresponding to the support column. As long as the support column can be made to slide along the chute.

[0038] In this embodiment, the tightening member is rotatably provided on the support column. One of the tightening members is also drivingly connected to a rotating motor 17 so that the tightening member can rotate.

[0039] The tightening member is rotatably provided on the support column, which enables the workpiece to rotate after being clamped between the two tightening members. One of the tightening members is provided with a rotating motor 17, which enables the workpiece to rotate driven by the rotating motor 17. The rotation of the workpiece enables the inspection gauge to detect the runout at various positions in the circumferential direction of the workpiece, so that the workpiece is detected at several positions in the circumferential direction by a plurality of inspection gauges at each length position. That is to say, the same point on the surface of the workpiece may be measured by multiple inspection gauges. Furthermore, there are more inspection points at each length position of the workpiece, and the inspection results are more accurate. The tightening member is provided with a conical positioning groove so that one end of the workpiece will be concentric with the center position of the tightening member under the guidance of the positioning groove after entering the positioning groove. If not concentric, the fluctuation of the surface of the workpiece relative to the center of the tightening member during the rotation of the workpiece is large, which is not conducive to inspection.

[0040] During the rotation of the workpiece, by recording and corresponding the current angle of the workpiece and the current position of the inspection gauge corresponding to the workpiece, it can be determined which position of the workpiece each inspection gauge currently corresponds to, so that the outer contour of the workpiece finally fitted is accurate.

[0041] In this embodiment, a correction mechanism is further included. The correction mechanism includes a sliding seat and a pressure head sliding seat 8 connected to the sliding seat. The sliding seat is slidably provided on the base, and the sliding direction of the sliding seat is parallel to the connection line of the two support columns. The base and the sliding seat are also matched by a dovetail chute and a dovetail slider. The pressure head sliding seat 8 is located directly above the connection line of the centers of the two tightening members. The pressure head sliding seat 8 is also provided with a pushing device 9 for driving the pressure head sliding seat 8 to lift and lower. The pushing device 9 can also adopt a hydraulic cylinder 11. In this embodiment, two support piles are further included. The two support piles are slidably provided on the base. The sliding directions of the two support piles are parallel to the sliding direction of the sliding seat. The support piles are located directly below the connection line of the centers of the two tightening members.

[0042] When it is detected that the workpiece is bent at a certain position, the two support piles can be moved to both ends of the bent position and support the lower part of the workpiece. Subsequently, the pressure head sliding seat 8 is moved to the bent position and pressed downward against the workpiece under the push of the pushing device 9, so that the bent part of the workpiece is straightened. The rotation of the tightening member can make the bent part of the workpiece rotate to bend upward, which is convenient for the pressure head sliding seat 8 to press the upward-bent part downward for correction. During the correction process of the workpiece, both ends of the bent part of the workpiece are supported by the support piles. Thus, in cooperation with the pressure of the pressure head sliding seat 8, the workpiece is straightened.

[0043] In this embodiment, the support pile includes a hydraulic cylinder 11 and a top block 12. The top block 12 is arranged at the top of the hydraulic cylinder 11. The top block 12 directly contacts the workpiece and is used to support the workpiece. The hydraulic cylinder 11 enables the top block 12 to move up and down, thereby pressing against the lower surface of the workpiece. The hydraulic cylinder 11 also enables it to adapt to workpieces of various diameters. The support member 1 is arranged in a C shape, and its opening 16 is arranged above to facilitate the press head slider 8 to contact and squeeze the workpiece through the opening 16.

[0044] In this embodiment, the support member 1 is provided with a strip-shaped hole 13 communicating its two ends. As Figure 4 shown, it also includes a number of adjustment pipes 14 inserted through the strip-shaped hole 13. The outer wall of the adjustment pipe 14 is provided with threads and two locking nuts 15 are arranged in cooperation with the support member 1 to clamp the support member 1 with the two locking nuts 15. The inspection gauge is inserted through the inside of the adjustment pipe 14 and connected to the adjustment pipe 14.

[0045] The support member 1 is provided with the strip-shaped hole 13 so that the adjustment pipe 14 can be at any position within the strip-shaped hole 13. After the position of the adjustment pipe 14 is adjusted, the adjustment pipe 14 can be fixed to the strip-shaped hole 13 through the two locking nuts 15. Furthermore, the inspection gauge connected to the adjustment pipe 14 is fixed to the support member 1. This enables the position of the inspection gauge to be adjusted to any position as required. It also enables the number of adjustment gauges to be increased or decreased as required.

[0046] In this embodiment, the top of the support member 1 is provided with an opening 16 to enable the workpiece to enter and exit the support member 1 through the opening 16. There are at least 4 inspection gauges. The workpiece is generally cylindrical. By detecting three points on the surface with three inspection gauges, the center position of the workpiece can be calculated based on the positions of the three points. In order to reduce errors, the inspection gauges are set to at least 4. After the results are detected by a number of inspection gauges, the detection data of the inspection gauges with relatively large differences are removed, thereby better eliminating errors.

[0047] In this embodiment, the support member 1 is provided with a support base 10 so that the support member 1 is supported on the base through the support base 10. As Figure 2 shown, the support base 10 is slidably arranged on the base. The sliding direction of the support base 10 is parallel to the sliding direction of the slider. Specifically, the sliding grooves of the slider, the support pile, the support column and the support base 10 are not on the same straight line but are parallel to each other.

[0048] In this embodiment, the inspection gauge is a dial indicator. A ball is arranged at the tip of the dial indicator. The ball can roll smoothly on the surface of the workpiece, thereby reducing friction.

Claims

1. A precision steel pipe bending detection device, characterized in that: It comprises a detection component and a support table for supporting a workpiece; the detection component comprises a support member and a plurality of detection tables; the support member is C-shaped so that the support member can be mounted on the outside of the workpiece and move relative to the workpiece; the plurality of detection tables are arranged on the support member and distributed in a ring shape so that the workpiece can pass between the plurality of detection tables.

2. The precision steel pipe bending detection device according to claim 1, characterized in that: The support platform includes two support columns; it also includes a base; the two support columns are arranged opposite to each other and can be relatively moved on the base; the support columns are each provided with a clamping piece and the two clamping pieces are arranged opposite to each other so that the workpiece can be clamped and supported between the two clamping pieces; the clamping piece is provided with a conical positioning groove.

3. The precision steel pipe bending detection device according to claim 2, characterized in that: The jacking piece is rotatably arranged on the support column; one of the jacking pieces is also transmission-connected to a rotating motor so that the jacking piece can rotate.

4. The precision steel pipe bending detection device according to claim 3, characterized in that: It also includes a correction mechanism; the correction mechanism includes a slide and a pressure head connected to the slide; the slide is slidably arranged on the base and the sliding direction of the slide is parallel to the line connecting the two support columns; the pressure head is located directly above the line connecting the centers of the two tightening members; the pressure head is also equipped with a pushing device for driving the pressure head to rise and fall.

5. The precision steel pipe bending detection device according to claim 4, characterized in that: It also includes two supporting piles; the two supporting piles are slidably arranged on the base; the sliding direction of the two supporting piles is parallel to the sliding direction of the sliding seat; the supporting piles are located directly below the line connecting the centers of the two tightening members.

6. The precision steel pipe bending detection device according to claim 5, characterized in that: The supporting pile comprises a hydraulic cylinder and a top block; the top block is arranged on the top of the hydraulic cylinder.

7. The precision steel pipe bending detection device according to claim 6, characterized in that: The support member is provided with a strip hole connecting its two ends; it also includes a plurality of adjustment tubes passing through the strip holes; the outer wall of the adjustment tube is provided with a thread and is matched with the support member and is provided with two locking nuts so that the two locking nuts clamp the support member; the detection meter is passed through the inside of the adjustment tube and connected to the adjustment tube.

8. The precision steel pipe bending detection device according to claim 7, characterized in that: The top of the support member is provided with an opening so that the workpiece can enter and exit the support member through the opening; and there are at least four detection tables.

9. The precision steel pipe bending detection device according to claim 8, characterized in that: The support member is provided with a support seat, so that the support member is supported on the base through the support seat; the support seat is slidably arranged on the base; the sliding direction of the support seat is parallel to the sliding direction of the slide seat.

10. The precision steel pipe bending detection device according to claim 9, characterized in that: The detection gauge is a dial gauge; a ball is arranged at the tip of the dial gauge.

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