Drilling stabilizing device for measuring residual stress through blind hole method

Abstract

According to the drilling stabilizing device for measuring the residual stress through the blind hole method, the cooperation of the sleeve and the support and the ingenious design of the locking gland are combined, and the stability of the whole structure is guaranteed. Moreover, an adjusting screw is introduced, so that the position of the drilling tool can be flexibly adjusted in the radial direction, and diversified test requirements are met. In addition, through perfect combination of the limiting bolt and the fixing ring, stable fixation of the drilling tool is achieved, fine adjustment can be conducted on the drilling tool in the axial direction, and the testing precision is further improved. And the supporting legs are flexibly matched with the adjusting sleeves, so that the height of the supporting legs is easy to adjust, and the stabilizing device can easily adapt to different test scenes. In addition, due to the application of the electromagnetic chuck, firm connection between the stabilizing device and the workpiece to be tested is ensured, and any shaking or displacement in the testing process is effectively prevented. The device not only is simple in structure and convenient to operate, but also can be quickly fixed on the workpiece to be detected, so that the stability of the device on the surface of the workpiece is ensured, and a solid guarantee is provided for the working state of the drilling tool.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning tooling, in particular to a drilling stabilization device for measuring residual stress using a blind hole method. Background Art

[0002] During the workpiece manufacturing process, factors such as external forces and temperature changes can easily lead to uneven plastic deformation, which in turn forms residual stress. This stress not only deforms the material and reduces the strength of the component, but may also cause cracks and fractures, affecting the performance of the workpiece. Especially in mechanical processing, external forces and temperature changes are the main causes of residual stress. During processes such as casting, forging, welding and cutting, the redistribution of residual stress will affect the size, shape and position accuracy and assembly accuracy of parts, reduce their fatigue resistance, corrosion resistance and creep resistance, and ultimately affect the performance and service life of the equipment. Therefore, it is crucial to accurately detect and evaluate residual stress.

[0003] There are many methods for testing residual stress, including the slotting stress release method, the blind hole method, the ray diffraction method, the magnetic method, and the ultrasonic method. Among them, the blind hole method has the advantages of simple equipment, convenient on-site operation, high measurement accuracy, and low destructiveness. It is particularly commonly used in residual stress measurement of welded parts and castings. This method releases the stress at the measured point by drilling a small through hole or a blind hole in the workpiece, and measures the released strain by a strain gauge attached to the periphery of the hole in advance. Subsequently, the residual stress is calculated using the principles of elastic mechanics. When the diameter and depth of the drilled hole are moderate, it has almost no effect on the normal use of the measured component.

[0004] However, in practical applications, the installation and positioning of the drilling device is a technical problem. Whether it is easy to install and accurately position is directly related to the quality of drilling and the measurement accuracy of residual stress. Especially when dealing with workpiece surfaces or non-planar, vertical, and inclined surfaces, the installation of the drilling device usually requires the cooperation of multiple people, which undoubtedly increases the difficulty of centering and fixing the device, which is not only time-consuming and labor-intensive, but may also affect the accuracy of the measurement results.

[0005] In addition, when the drilling tool is working, due to the small hole diameter, the required drill bit diameter is also correspondingly small, which may cause swinging during the drilling process, thereby increasing the risk of drill bit damage. Therefore, in practical applications, we need to pay attention to these issues and take corresponding measures to ensure the accuracy and reliability of residual stress measurement. Utility Model Content

[0006] In order to solve the deficiencies of the prior art, the utility model provides a drilling stabilization device for measuring residual stress by blind hole method.

[0007] It includes drilling tools, sleeves, locking glands and supports;

[0008] The drilling tool is adapted to the sleeve and is coaxially arranged in the sleeve;

[0009] The upper part of the sleeve is provided with a limit bolt matched with the drilling tool;

[0010] The sleeve is located in the support and is fixed on the support by a locking gland;

[0011] An adjusting ring is provided on the upper part of the sleeve, an adjusting groove matched with the adjusting ring is provided in the support, and an adjusting screw matched with the adjusting ring is provided on the support;

[0012] A rotating handle is provided in the middle of the support;

[0013] A plurality of adjusting sleeves are arranged at the lower part of the support, the inner thread of the adjusting sleeves is connected with the supporting legs, the upper part of the adjusting sleeves is provided with adjusting nuts connected with the supporting legs, and the bottom end of the supporting legs is movably provided with electromagnetic suction cups.

[0014] In a preferred embodiment, the drilling tool is also equipped with a laser locator, which is arranged on the upper part of the drilling tool and is used for centering adjustment of the drilling tool and the center of the drill hole.

[0015] In a preferred embodiment, a groove is provided at the lower portion of the support.

[0016] In a preferred embodiment, the device further comprises a level.

[0017] In a preferred embodiment, the level is fixedly disposed in the groove.

[0018] In a preferred embodiment, the inner diameter of the adjustment groove is larger than the outer diameter of the adjustment ring.

[0019] In a preferred embodiment, a fixing ring is provided on the sleeve, and the drilling tool is inserted into the fixing ring.

[0020] In a preferred embodiment, the inner wall of the fixing ring is threadedly connected to the outer wall of the drilling tool.

[0021] In a preferred embodiment, the fixing ring also abuts against the top end of the sleeve.

[0022] In a preferred embodiment, a connecting sleeve is sleeved on the support, and a locking pin cooperating with the support is provided on the connecting sleeve.

[0023] In a preferred embodiment, the rotating handles are symmetrically arranged on both sides of the connecting tube.

[0024] In a preferred embodiment, the number of the adjusting screws is 2-8, preferably 3-6, more preferably 4-5, such as 4 or 5.

[0025] In a preferred embodiment, the adjusting screws are evenly arranged at equal distances along the axis of the support.

[0026] Compared with the prior art, the utility model has the following beneficial technical effects:

[0027] The utility model provides a drilling stabilization device for measuring residual stress by the blind hole method, which combines the cooperation of the sleeve and the support, and the ingenious design of the locking cover to ensure the stability of the overall structure. In addition, the utility model introduces an adjustment screw, so that the drill can flexibly adjust its position in the radial direction to meet the diverse testing needs. In addition, the perfect combination of the limit bolt and the fixing ring not only realizes the stable fixation of the drill, but also can fine-tune the drill in the axial direction, further improving the test accuracy. The flexible cooperation between the legs and the adjustment sleeve makes it easy to adjust the height of the legs, so that the stabilization device can easily adapt to different testing scenarios. In addition, the use of the electromagnetic chuck ensures a firm connection between the stabilization device and the workpiece to be tested, effectively preventing any shaking or displacement during the test. The device is not only simple in structure and easy to operate, but also can be quickly fixed on the workpiece to be tested, ensuring its stability on the workpiece surface, and providing a solid guarantee for the working state of the drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the device structure of a preferred embodiment of the utility model.

[0030] The following are the descriptions of the reference numerals:

[0031] 1. Drilling tool; 2. Sleeve; 3. Locking cover; 4. Support; 5. Limit bolt; 6. Adjusting ring; 7. Adjusting slot; 8. Adjusting screw; 9. Rotating handle; 10. Adjusting sleeve; 11. Support leg; 12. Adjusting nut; 13. Electromagnetic suction cup; 14. Level; 15. Fixing ring; 16. Connecting tube; 17. Groove. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indications will also change accordingly.

[0034] In this utility model, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions, taking "A and / or B" as an example, including solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist, and is not within the scope of protection required by the utility model.

[0036] In a preferred embodiment, the structure of a drilling stabilization device for measuring residual stress by blind hole method is as shown in the attached figure. Figure 1 As shown, it includes a drilling tool 1, a sleeve 2, a locking gland 3 and a support 4;

[0037] The drilling tool 1 is adapted to the sleeve 2 and is coaxially arranged in the sleeve 2;

[0038] The sleeve 2 is used to install the drilling tool 1;

[0039] The upper part of the sleeve 2 is provided with a limit bolt 5 which cooperates with the drilling tool 1;

[0040] The position of the drilling tool 1 in the sleeve 2 is fixed by the limit bolt 5;

[0041] The sleeve 2 is provided with a fixing ring 15;

[0042] The fixing ring 15 can be threadedly connected to the drilling tool 1 and abut against the top of the sleeve 2; the device can adjust the relative position of the drilling tool 1 in the sleeve 2 by rotating the fixing ring 15;

[0043] The sleeve 2 is located in the support 4 and is fixed on the support 4 by locking the gland 3;

[0044] The locking gland 3 is threadedly connected to the support 4;

[0045] An adjusting ring 6 is provided on the upper portion of the sleeve 2;

[0046] The support 4 is provided with an adjustment groove 7 adapted to the adjustment ring 6;

[0047] The inner diameter of the adjusting groove 7 is larger than the outer diameter of the adjusting ring 6 .

[0048] The support 4 is provided with an adjusting screw 8 which matches with the adjusting ring 6;

[0049] The number of the adjusting screws 8 is 4 and they are evenly arranged at equal distances along the axis of the support 4; the sleeve 2 is fixedly arranged in the support 4 by locking the gland 3, thereby fixing the drilling tool 1;

[0050] When the device is fixedly installed, the adjustment screw 8 can be used to push the adjustment ring 6 to adjust the position of the drill 1 in the radial direction, thereby ensuring the alignment of the drill 1 with the position to be welded;

[0051] A rotating handle 9 is provided in the middle of the support 4;

[0052] The support 4 is sleeved with a connecting tube 16;

[0053] The connecting tube 16 is provided with a locking pin that cooperates with the support 4;

[0054] The rotating handles 9 are symmetrically arranged on both sides of the connecting tube 16 .

[0055] The stabilizing device can be conveniently operated by rotating the handle 9; at the same time, the rotating handle 9 can be adjusted on the support 4 through the connecting tube 16 to facilitate the use needs of different users;

[0056] The support 4 is provided with a plurality of adjustment sleeves 10 at the bottom.

[0057] The bottom of the support 4 is a square structure;

[0058] The number of the adjusting sleeves 10 is 4 and they are located at the four corners of the bottom of the support 4 to achieve stable support for the device;

[0059] The adjusting sleeve 10 is internally threadedly connected with a support leg 11;

[0060] The number of the legs 11 is the same as the number of the adjustment sleeves 10;

[0061] The upper side of the adjusting sleeve 10 is provided with an adjusting nut 12 connected to the supporting leg 11;

[0062] By adjusting the threaded connection between the sleeve 10 and the leg 11, the height of the leg 11 can be easily adjusted;

[0063] An electromagnetic chuck 13 is movably provided at the bottom of the support leg 11. The electromagnetic chuck 13 can ensure the firmness of the connection with the workpiece to be measured, thereby ensuring the stability of the stabilizing device.

[0064] At the same time, the electromagnetic chuck 13 can be manufactured or adjusted according to the surface structure of the workpiece to be measured to ensure better fit with the workpiece to be measured and improve the firmness of adsorption or fixation;

[0065] The device also includes a level 14;

[0066] The level 14 is arranged at the lower part of the support 4;

[0067] Specifically, a groove 17 is provided at the lower portion of the support 4, and the level 14 is fixedly disposed in the groove 17;

[0068] The horizontality of the stabilizing device can be adjusted by a level meter 14 installed on the support 4 to ensure that the drilling tool 1 is perpendicular to the surface of the workpiece to be measured;

[0069] A laser locator may also be provided on the upper portion of the drilling tool 1 to facilitate the alignment adjustment of the drilling tool 1 with the center of the borehole.

[0070] In summary, the utility model provides a drilling stabilization device for measuring residual stress by blind hole method, which has the following characteristics:

[0071] 1) The device uses the close fit between the sleeve and the support, combined with the setting of the locking gland, to ensure the stable installation of the overall structure. The flexible application of the adjustment screw allows the drill to be easily adjusted in the radial direction. In addition, the setting of the limit bolt and the fixing ring not only fixes the drill, but also enables fine adjustment in the axial direction, enhancing the accuracy of the operation.

[0072] 2) Through the cooperation of the legs and the adjustment sleeve, the height of the legs can be easily adjusted to facilitate the device to adapt to different usage conditions. At the same time, through the application of the electromagnetic chuck, the firmness of the connection between the stabilizing device and the workpiece to be measured is ensured, thereby enhancing the overall stability.

[0073] 3) The device has a simple structure, convenient operation, and is easy to fix on the workpiece to be measured, ensuring its stability on the workpiece surface and effectively ensuring the stability of the drilling tool in working condition.

[0074] The above description is only a preferred embodiment of the utility model; it does not limit the patent scope of the utility model; all equivalent structural changes made under the utility model concept of the utility model; using the contents of the utility model specification and drawings; or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A drilling stabilization device for measuring residual stress by blind hole method, characterized in that: It includes drilling tools, sleeves, locking glands and supports; The drilling tool is adapted to the sleeve and is coaxially arranged in the sleeve; The upper part of the sleeve is provided with a limit bolt matched with the drilling tool; The sleeve is located in the support and is fixed on the support by a locking gland; An adjusting ring is provided on the upper part of the sleeve, an adjusting groove matched with the adjusting ring is provided in the support, and an adjusting screw matched with the adjusting ring is provided on the support; A rotating handle is provided in the middle of the support; A plurality of adjusting sleeves are arranged at the lower part of the support, the inner thread of the adjusting sleeves is connected with the supporting legs, the upper part of the adjusting sleeves is provided with adjusting nuts connected with the supporting legs, and the bottom end of the supporting legs is movably provided with electromagnetic suction cups.

2. The device according to claim 1, characterized in that: The drilling tool is equipped with a laser locator, which is arranged on the upper part of the drilling tool and is used for centering adjustment between the drilling tool and the center of the drill hole.

3. The device according to claim 1, characterized in that: The lower part of the support is provided with a groove; the device also includes a level, and the level is fixed in the groove.

4. The device according to claim 1, characterized in that: The inner diameter of the adjusting groove is larger than the outer diameter of the adjusting ring.

5. The device according to claim 1, characterized in that: The sleeve is provided with a fixing ring, the drilling tool is inserted into the fixing ring, and the inner wall of the fixing ring is threadedly connected with the outer wall of the drilling tool.

6. The device according to claim 5, characterized in that: The fixing ring is also in contact with the top end of the sleeve.

7. The device according to claim 1, characterized in that: A connecting tube is sleeved on the support, a locking pin cooperating with the support is provided on the connecting tube, and the rotating handles are symmetrically arranged on both sides of the connecting tube.

8. The device according to claim 1, characterized in that: The number of the adjusting screws is 2-8.

9. The device according to claim 8, characterized in that: The adjusting screws are evenly arranged at equal distances along the axis of the support.

10. The device according to claim 9, characterized in that: The number of the adjusting screws is 4, and they are evenly arranged at equal distances along the axis of the support.

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