CN212761272U - Centering perforating device suitable for blind hole method detects residual stress - Google Patents
Centering perforating device suitable for blind hole method detects residual stress Download PDFInfo
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- CN212761272U CN212761272U CN202021480571.7U CN202021480571U CN212761272U CN 212761272 U CN212761272 U CN 212761272U CN 202021480571 U CN202021480571 U CN 202021480571U CN 212761272 U CN212761272 U CN 212761272U
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Abstract
The utility model discloses a centering perforating device suitable for blind hole method detects residual stress belongs to location frock technical field. Comprises a drilling tool, a drilling tool fixing sleeve and a bracket; the bracket comprises a bracket fixing sleeve and a plurality of telescopic supporting legs; the drilling tool is connected with a drilling tool fixing sleeve through a drill chuck structure, and the drilling tool fixing sleeve is screwed inside the support fixing sleeve; one end of each telescopic supporting leg is movably connected with the support fixing sleeve, the other end of each telescopic supporting leg is movably connected with the electromagnetic chuck, and locking devices are arranged at the joints of the telescopic supporting legs, the support fixing sleeves and the electromagnetic chucks; the drilling tool is provided with a laser locator, and the support fixing sleeve is provided with a level gauge. The device stable in structure, easy operation, extensive applicability have realized centering accurate, the degree of depth is controllable, avoid targets such as drilling off-centre, have reduced or even eliminated the influence of drilling error to residual stress test, have further improved the authenticity and the reliability of weldment residual stress's measured data.
Description
Technical Field
The utility model belongs to the technical field of the location frock, concretely relates to centering perforating device suitable for blind hole method detects residual stress.
Background
The weldment is unevenly heated in the welding process, the thermal deformation and the tissue deformation caused by heating are often influenced by the rigidity of the weldment and the external constraint, and the welding residual stress exists in the weldment after welding. Residual stress adversely affects the fatigue strength, service life, and resistance to stress corrosion cracking of the component. In order to ensure the reliability of the welded joint, the stress distribution of the welded joint needs to be measured and grasped. In the existing measuring methods of welding residual stress, a drilling method is complete in theoretical system and is the most common welding residual stress measuring method at present.
However, the residual stress measured by the drilling method has more error factors, which affect the reliability of the measurement result. The measurement result of the residual stress is disturbed by the eccentricity generated during drilling, the transverse effect of the strain gauge, the deviation of the sticking angle of the strain gauge, the plastic deformation caused by the stress concentration at the hole edge, the diameter and the depth of the drilled hole, the shape of the measured surface, the size of the patch and other factors. In order to ensure the reliability of the residual stress measurement result, the factors causing the measurement result error need to be analyzed and evaluated, so that the residual stress measurement precision of the drilling method is improved to a certain extent.
When the weldment is used for measuring the residual stress of a welding area, due to the difference of the structure and the shape of the weldment, the drilled hole and the circular shape of the strain gauge are often eccentric when the strain gauge is drilled, the deviation between a measuring result and the actual residual stress is overlarge, and the reliability of the detection result is questioned. Therefore, the blind hole method is used for measuring residual stress and has very strict drilling requirements. The accuracy of the drilling directly affects the authenticity and reliability of the data. The direct use of the electric hand drill cannot ensure the drilling precision, so the drilling device is required to ensure that the eccentricity is controllable, and the problem that the blind hole method for measuring the residual stress of the weldment is urgently solved.
Disclosure of Invention
In order to solve the defect that exists among the above-mentioned prior art, the utility model aims to provide a centering perforating device suitable for blind hole method detects residual stress, stable in structure, easy operation, extensive applicability can effectively improve drilling accuracy, improve work efficiency.
The utility model discloses a following technical scheme realizes:
the utility model discloses a centering and punching device suitable for detecting residual stress by a blind hole method, which comprises a drilling tool, a drilling tool fixing sleeve and a bracket; the bracket comprises a bracket fixing sleeve and a plurality of telescopic supporting legs; the drilling tool is connected with a drilling tool fixing sleeve through a drill chuck structure, and the drilling tool fixing sleeve is screwed inside the support fixing sleeve; one end of each telescopic supporting leg is movably connected with the support fixing sleeve, the other end of each telescopic supporting leg is movably connected with the electromagnetic chuck, and locking devices are arranged at the joints of the telescopic supporting legs, the support fixing sleeves and the electromagnetic chucks; the drilling tool is provided with a laser locator, and the support fixing sleeve is provided with a level gauge.
Preferably, the drill fixing sleeve is provided with length scale marks.
Preferably, the drill fixing sleeve is provided with a rotating handle.
Further preferably, the surface of the rotating handle is treated to prevent slipping.
Preferably, the number of telescoping legs is 3, with 3 telescoping legs being provided 120 ° apart.
Preferably, the telescopic supporting leg is provided with a length scale mark.
Preferably, one end of each telescopic supporting leg is connected with the support fixing sleeve through a ball hinge, and the other end of each telescopic supporting leg is connected with the electromagnetic chuck through a ball hinge.
Preferably, the lower surface of the electromagnetic chuck is a curved surface matched with the surface shape of the workpiece to be measured.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a centering perforating device suitable for blind hole method detects residual stress, drilling tool pass through drill chuck structure and are connected with the fixed cover of drilling tool, combine laser locator, when guaranteeing the drilling tool axiality, can be more rapid fix a position and punch, save a large amount of required time to the hole when guaranteeing positioning accuracy. The perpendicularity of the drilling tool can be guaranteed by the level gauge, and unstable data and even drill bit fracture caused by incorrect punching are avoided. The drilling tool fixing sleeve is in threaded connection with the inside of the support fixing sleeve, and the drilling tool can move in the vertical direction through rotation, so that the drilling depth can be adjusted. The angle of a plurality of flexible landing legs and the fixed cover of support and electromagnet can be adjusted in a flexible way, and the height of flexible landing leg can be adjusted, can adapt to various detection environment, and after the mounted position has been adjusted, electromagnet can firmly adsorb the device on the work piece that awaits measuring, and rational in infrastructure is stable, assembles and dismantles convenient and fast, and easy operation does not rely on operating personnel's technical merit. When the residual stress of the weldment is measured by the blind hole method, the aims of accurate centering, controllable depth, avoidance of drilling eccentricity and the like are achieved, the influence of drilling errors on the residual stress test is reduced or even eliminated, and the authenticity and reliability of measurement data of the residual stress of the weldment are further improved.
Furthermore, the scale marks are arranged on the drilling tool fixing sleeve, so that the advance and take amount of the drill bit can be accurately controlled, and the detection precision is improved.
Furthermore, the rotary handle is arranged on the drilling tool fixing sleeve, so that the operation is convenient.
Furthermore, the surface of the rotating handle is processed by anti-slip treatment, thereby further improving the stability and safety of operation.
Further, the number of telescopic supporting legs is 3, and 3 telescopic supporting legs are arranged at intervals of 120 degrees, so that a stable triangular supporting structure can be formed.
Furthermore, the length scale marks are arranged on the telescopic supporting legs, so that all the telescopic supporting legs can be conveniently and synchronously adjusted in height, and the efficiency is improved.
Furthermore, one end of the telescopic supporting leg is connected with the support fixing sleeve through a ball hinge, the other end of the telescopic supporting leg is connected with the electromagnetic chuck through the ball hinge, the angle adjusting range is wide, the telescopic supporting leg can be suitable for workpieces of various structures, and the adaptability is high.
Furthermore, the lower surface of the electromagnetic chuck is a curved surface matched with the surface shape of the workpiece to be detected, so that the workpiece with the curved surface can be firmly fixed.
Drawings
Fig. 1 is a schematic view of the overall structure of the centering and punching device suitable for detecting residual stress by the blind hole method of the present invention;
fig. 2 is the utility model discloses a centering perforating device's a three-dimensional schematic diagram suitable for blind hole method detects residual stress.
In the figure: 1-drilling tool, 2-drilling tool fixing sleeve, 2-1-rotating handle, 3-support, 3-1-support fixing sleeve, 3-2-telescopic supporting leg, 3-3-electromagnetic chuck, 4-laser locator and 5-level gauge.
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific examples, which are intended to illustrate and not to limit the invention:
like fig. 1, fig. 2, the utility model discloses a centering perforating device suitable for residual stress is detected to blind hole method, including drilling tool 1, the fixed cover of drilling tool 2 and support 3. The drilling tool 1 is preferably a high-speed motor with high transmission efficiency and small rotational inertia and the rotating speed is about 10000 r/min. The bracket 3 comprises a bracket fixing sleeve 3-1 and a plurality of telescopic supporting legs 3-2; the drilling tool 1 is connected with the drilling tool fixing sleeve 2 through a drill chuck structure, and the drill chuck structure can realize reliable connection and centering through threads and clamping jaws; the drilling tool fixing sleeve 2 is in threaded connection with the inside of the support fixing sleeve 3-1, and preferably, the drilling tool fixing sleeve 2 is provided with length scale marks; the drilling tool fixing sleeve 2 is preferably made of carbon steel; preferably, the drill fixing sleeve 2 is provided with a rotating handle 2-1, and the surface of the rotating handle 2-1 can be processed with anti-skid lines, anti-skid convex points or fixed anti-skid layers after anti-skid treatment.
One end of a plurality of telescopic supporting legs 3-2 is movably connected with the bracket fixing sleeve 3-1, the other end is movably connected with an electromagnetic chuck 3-3, and the joint can adopt a hinged support or a spherical hinge with wider angle; locking devices are arranged at the joints of the telescopic supporting legs 3-2, the support fixing sleeves 3-1 and the electromagnetic chucks 3-3; preferably, the number of telescopic legs 3-2 is 3, 3 telescopic legs 3-2 being arranged 120 ° apart. Preferably, the telescopic supporting leg 3-2 is provided with length scale marks.
The electromagnetic chuck 3-3 can be used for manufacturing a plurality of accessories with different radians on the lower surfaces, and is used for detecting the surface of a workpiece to be detected as a curved surface, so that the firmness is improved.
The drilling tool 1 is provided with a laser locator 4, and the support fixing sleeve 3-1 is provided with a level gauge 5.
The utility model discloses a centering perforating device suitable for blind hole method detects residual stress is divided into following step at the during operation:
1) the drilling tool 1 is rotationally clamped through the drilling tool fixing sleeve 2, and the alloy steel drilling bit with the diameter of 1.8-2 is assembled at the head of the drilling tool 1 according to the detection work requirement;
2) the drilling tool fixing sleeve 2 is connected with the support fixing sleeve 3-1 through screw threads in a screwing mode;
3) three telescopic supporting legs 3-2 connected to a support fixing sleeve 3-1 are unfolded, and the levelness is adjusted through a level meter 5 arranged on the support fixing sleeve 3-1, so that the drilling tool 1 is ensured to be vertical to the surface of a workpiece to be measured;
4) after the leveling is adjusted, a laser positioner 4 is opened, a drilling tool 1 is centered with the drilling center of the strain gauge, and then the device is firmly adsorbed on a workpiece to be measured through a telescopic supporting leg 3-2 positioned at the bottom of the telescopic supporting leg 3-2;
5) the power supply of the drilling tool 1 is switched on, the switch of the drilling tool 1 is turned on, the drilling depth is controlled by rotating the drilling tool fixing sleeve 2 according to the dial above the drilling tool fixing sleeve 2 according to the working requirement, drilling is carried out, and meanwhile, residual stress data are collected. And (5) after the drilling is finished, reversely rotating the drilling tool fixing sleeve 2, withdrawing from the drilling work, and finishing the drilling process.
The method of using the present invention is further explained below with a specific embodiment:
and (3) polishing the surface of the workpiece to be detected smoothly according to the residual stress detection requirement, removing surface dirt and oil stain, pasting a strain gauge, and connecting a residual stress acquisition instrument. The drilling tool 1 adopts a rechargeable electric drill, a laser locator is arranged in the electric drill, the length and the outer diameter of the electric drill are 130mm and 40mm, and the size of a chuck of the electric drill is phi 1.8 mm. The drilling tool fixing sleeve 2 rotationally clamps the drilling tool 1, and the drilling tool fixing sleeve 2 is connected with the support fixing sleeve 3-1 through external threads. Three telescopic supporting legs 3-2 of the support 3 are opened, the levelness is adjusted through a level gauge 5 on the support fixing sleeve 3-1, and meanwhile, a laser positioner 4 is adjusted, so that the drill bit is superposed with the drilling center of the strain gauge and is positioned 1mm above the drilling center of the strain gauge. After the adjustment is completed, the device is tightly sucked and fixed through the electromagnetic chuck 3-3. Starting a switch of the drilling tool 1, measuring the depth through a thread of a rotating handle 2-1 on a drilling tool fixing sleeve 2, and controlling the feeding amount of a drill bit according to a dial above the drilling tool fixing sleeve 2, wherein the depth is two millimeters per rotation. When the position reaches the drilling depth, the rotary handle 2-1 is rotated reversely to exit the drilling process, and meanwhile, the stress detection instrument collects the residual stress measurement value at the position. And after the drilling is finished, closing the switch of the drilling tool 1, dismantling the support 3 and finishing the work.
It should be noted that the above description is only a part of the embodiments of the present invention, and equivalent changes made by the system described in the present invention are all included in the protection scope of the present invention. The technical field of the present invention can be replaced by other embodiments described in a similar manner, without departing from the structure of the present invention or exceeding the scope defined by the claims, which belong to the protection scope of the present invention.
Claims (8)
1. A centering and punching device suitable for detecting residual stress by a blind hole method is characterized by comprising a drilling tool (1), a drilling tool fixing sleeve (2) and a support (3); the bracket (3) comprises a bracket fixing sleeve (3-1) and a plurality of telescopic supporting legs (3-2); the drilling tool (1) is connected with the drilling tool fixing sleeve (2) through a drill chuck structure, and the drilling tool fixing sleeve (2) is screwed in the support fixing sleeve (3-1); one end of each of the plurality of telescopic supporting legs (3-2) is movably connected with the support fixing sleeve (3-1), the other end of each of the plurality of telescopic supporting legs is movably connected with the electromagnetic chuck (3-3), and locking devices are arranged at the joints of the telescopic supporting legs (3-2) and the support fixing sleeve (3-1) and the electromagnetic chuck (3-3); the drilling tool (1) is provided with a laser locator (4), and the support fixing sleeve (3-1) is provided with a level gauge (5).
2. The centering and punching device for detecting residual stress by the blind hole method as claimed in claim 1, wherein the drill tool retaining sleeve (2) is provided with length scale marks.
3. The centering and punching device for detecting residual stress by the blind hole method as claimed in claim 1, wherein the drill tool fixing sleeve (2) is provided with a rotating handle (2-1).
4. A centering and punching device suitable for blind hole method residual stress detection according to claim 3, characterized in that the surface of the rotating handle (2-1) is treated with anti-slip.
5. A centering and punching device suitable for blind hole method residual stress detection according to claim 1, characterized in that the number of telescopic legs (3-2) is 3, 3 telescopic legs (3-2) are arranged 120 ° apart.
6. The centering and punching device for detecting the residual stress by the blind hole method according to claim 1 is characterized in that the telescopic supporting leg (3-2) is provided with length scale marks.
7. The centering and punching device for detecting residual stress by the blind hole method as claimed in claim 1, wherein one end of a plurality of telescopic legs (3-2) is connected with the bracket fixing sleeve (3-1) through a ball hinge, and the other end is connected with the electromagnetic chuck (3-3) through a ball hinge.
8. The centering and punching device for detecting residual stress by the blind hole method as claimed in claim 1, wherein the lower surface of the electromagnetic chuck (3-3) is a curved surface matching the surface shape of the workpiece to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021480571.7U CN212761272U (en) | 2020-07-23 | 2020-07-23 | Centering perforating device suitable for blind hole method detects residual stress |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021480571.7U CN212761272U (en) | 2020-07-23 | 2020-07-23 | Centering perforating device suitable for blind hole method detects residual stress |
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| Publication Number | Publication Date |
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| CN212761272U true CN212761272U (en) | 2021-03-23 |
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| CN202021480571.7U Active CN212761272U (en) | 2020-07-23 | 2020-07-23 | Centering perforating device suitable for blind hole method detects residual stress |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114850538A (en) * | 2022-04-29 | 2022-08-05 | 郑州机械研究所有限公司 | Adaptive punching drill floor for blind hole method residual stress detection |
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2020
- 2020-07-23 CN CN202021480571.7U patent/CN212761272U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114850538A (en) * | 2022-04-29 | 2022-08-05 | 郑州机械研究所有限公司 | Adaptive punching drill floor for blind hole method residual stress detection |
| CN114850538B (en) * | 2022-04-29 | 2023-12-12 | 郑州机械研究所有限公司 | Adaptive punching drill floor for blind hole method residual stress detection |
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Inventor after: Li Shengwen Inventor after: Zhang Jianguo Inventor after: Li Wei Inventor after: Jiang Guiping Inventor after: Chen Wending Inventor after: Lin Lin Inventor after: Li Yilong Inventor after: Li Dieming Inventor after: Wang Yanxiang Inventor after: Zhang Shiming Inventor before: Li Shengwen Inventor before: Zhang Jianguo Inventor before: Li Wei Inventor before: Jiang Guiping Inventor before: Chen Wending Inventor before: Lin Lin Inventor before: Li Yilong Inventor before: Li Dieming Inventor before: Wang Yanxiang Inventor before: Zhang Shiming |