Drilling device for measuring residual stress of metal material

Abstract

The utility model discloses a drilling device for measuring residual stress of a metal material, which comprises a supporting assembly, a centering assembly and a drilling assembly, the supporting assembly comprises a positioning sleeve, a plurality of supporting pieces and a plurality of height adjusting pieces, and the plurality of supporting pieces are detachably connected to the peripheral side of the positioning sleeve in a sliding manner; each height adjusting part comprises a sliding part connected with the supporting part in a sliding mode and an adjusting part connected to the sliding part, and the adjusting parts are used for driving the sliding parts to move up and down; the centering assembly and the drilling assembly are matched with the positioning sleeve to conduct drilling positioning and drilling correspondingly. The device can be flexibly adjusted, is high in adaptability, and guarantees the detection accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of stress measurement, in particular to a drilling device for measuring residual stress of metal materials. Background Art

[0002] Residual stress exists in almost all materials and may be generated during the manufacturing process or service of the workpiece. Especially for workpieces that serve under alternating loads or corrosive environments, if residual stress is not considered or calculated during the design process, it will be one of the important factors leading to material failure. Residual stress can also be beneficial, such as the compressive stress generated by shot peening. The drilling strain method is a method for determining residual stress. The drilling method is used to determine the residual stress near the surface of an isotropic linear elastic material. The steps include: attaching a strain rosette to the surface of the object to be measured, then drilling a hole in the strain rosette, and then measuring the strain released on the surface of the object to be measured. Substituting the measured strain into a series of formulas can calculate the residual stress at the location where the material has been removed.

[0003] For example, the drilling instrument for residual stress measurement provided by publication number CN203772455U includes: a base, an electromagnetic fixing device, a sleeve fastening device, a positioning and centering device and a drilling device. The electromagnetic disk of the electromagnetic fixing device relies on the magnetism generated after power is turned on to adsorb on the surface of the ferromagnetic object, avoiding the influence of the traditional adhesive fixing method on the surface stress of the ferromagnetic object; the adjustment bolts of the electromagnetic fixing device are respectively connected to the chassis and the electromagnetic disk by different connection methods, making the centering process convenient and quick; the sleeve fastening device fixes the positioning and centering device and the drilling device by the same circumferential fixing method, ensuring that the drill bit and the drilling point of the strain rosette always correspond; the drill pusher of the drilling device can make the drill bit advance step by step along the depth direction to achieve the layer-by-layer advancement required by the blind hole method, which is convenient for controlling the feed amount.

[0004] The base of existing test instruments is generally in the shape of a regular triangular prism, with three adjustment bolts, which are respectively arranged at the three corners of the base to support the instrument. However, when testing some test pieces with obstacles, the base of the test instrument will cause obstruction at the bottom of the instrument, making it difficult to provide stable support, resulting in an inability to measure. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned technical deficiencies and to propose a drilling device for measuring residual stress of metal materials, so as to solve the technical problem in the prior art that when testing some test pieces with obstacles, the base of the test instrument will cause obstruction at the bottom of the instrument and it is difficult to provide stable support.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, the utility model provides a drilling device for measuring residual stress of metal materials, including a support assembly, a centering assembly and a drilling assembly, wherein the support assembly includes: a positioning sleeve, a plurality of support members and a plurality of height adjustment members, wherein the plurality of support members are detachably slidably connected to the circumference of the positioning sleeve; the plurality of height adjustment members each include a sliding portion slidably connected to the support member and an adjusting portion connected to the sliding portion, wherein the adjusting portion is used to drive the sliding portion to move up and down; wherein the centering assembly and the drilling assembly cooperate with the positioning sleeve to perform drilling positioning and drilling respectively.

[0008] In this device, the centering component cooperates with the positioning sleeve to adjust the device to align with the measured point, perform drilling positioning, and then use the cooperation of the drilling and positioning sleeve to drill holes to facilitate residual stress measurement.

[0009] In some embodiments, a first sliding groove is formed on the outer side of the positioning sleeve along the circumference thereof for connecting a support member, and a portion of the support member extends into the first sliding groove and can slide along the first sliding groove.

[0010] In some embodiments, the support member includes a slide plate and a support plate, the slide plate is partially fitted in the first slide groove and is slidably connected to the first slide groove, the slide plate is fixedly connected to the positioning sleeve by a first screw arranged through the slide plate, the support plate is vertically arranged on the outer side of the slide plate, and extends from the outer side wall of the slide plate along the outer side of the slide plate, and a second slide groove is opened on the support plate along its length direction for sliding connection with the sliding part; the top and bottom ends of one side of the slide plate are threadedly connected with the first screw, and a plurality of first threaded holes are opened along the circumference of the inner wall of the first slide groove at a horizontal position corresponding to the first screw.

[0011] In some embodiments, the sliding portion includes a slider, which is slidably disposed in the second sliding groove, and a second screw is threadedly connected between one side of the slider and the support plate for locking the slider; the adjusting portion includes a first screw, a first knob, a locking nut and a base cap, the first screw vertically penetrates the slider and is threadedly connected to the slider, and the bottom end of the first screw is rotatably connected to the base cap, and the top end is connected to the first knob, and the locking nut is disposed between the slider and the base cap, and is threadedly sleeved on the first screw.

[0012] In some embodiments, a plurality of horizontal adjustment members are provided on the circumference of the positioning sleeve, and the horizontal adjustment member passes through the side wall of one side wall of the positioning sleeve from the outside of the positioning sleeve, and extends to one end inside the positioning sleeve to form an adjustment end, and an adjustable adjustment zone is formed between the plurality of adjustment ends to adjust the position of the adjustment zone by adjusting the extension length of the adjustment end; specifically, each of the horizontal adjustment members includes a second screw and a second knob, and the second screw passes through a side wall of the positioning sleeve from the outside of the positioning sleeve and extends into the positioning sleeve, and the second screw is threadedly connected to the positioning sleeve, and the second knob is connected to one end of the second screw located on the outside of the positioning sleeve.

[0013] In some embodiments, the support assembly also includes a locking ring, the centering assembly includes a lens barrel and an eyepiece, the lower end of the locking ring is cooperatively connected with the inner side of the positioning sleeve, and the locking ring is sequentially provided with the lens barrel and the eyepiece connected thereto; the drilling assembly includes a turbine drill, a depth gauge and a milling cutter, the milling cutter is installed at the end of the turbine drill, one end of the milling cutter extends from the inner side of the top end of the positioning sleeve to the bottom end, the depth gauge is sleeved on the outside of the turbine drill, and the outside of the depth gauge is provided with scale lines.

[0014] Compared with the prior art, the drilling device for measuring residual stress of metal materials provided by the utility model has a support assembly, a centering assembly and a drilling assembly, and the support member can rotate around the circumference of the positioning sleeve. Therefore, when measuring a test piece with an obstacle, the position of the support member can be adjusted to avoid the obstacle, so that the test piece containing the obstacle can be effectively measured; the sliding part of the height adjustment member is slidably connected to the support member, so that the position of the height adjustment member can be adjusted by sliding the sliding part along the support member, so that it can adapt to a variety of different measurement positions; the adjusting part of the height adjustment member can adjust the sliding part to move up and down, and then can adjust the height of the support member and the positioning sleeve; so that the device can be flexibly adjusted, has high adaptability, and ensures the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the support component and the centering component of the drilling device for measuring residual stress of metal materials provided by the embodiment of the utility model when they are connected;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure when the support component and the drilling component of the drilling device for measuring residual stress of metal materials provided by the embodiment of the utility model are connected;

[0017] Figure 3 yes Figure 1 A schematic diagram of the main structure of a drilling device for measuring residual stress in metal materials;

[0018] Figure 4 yes Figure 1 A schematic diagram of the top view of a drilling device for measuring residual stress in metal materials;

[0019] Figure 5 It is a schematic diagram of the main structure of the support member and the height adjustment member of the drilling device for measuring residual stress of metal materials provided by the embodiment of the utility model;

[0020] Figure 6 It is a schematic diagram of the side cross-sectional structure of the support member and the height adjustment member of the drilling device for measuring residual stress of metal materials provided by the embodiment of the utility model;

[0021] Figure 7 It is a schematic cross-sectional structure diagram of the connection between the support member and the positioning sleeve of the drilling device for measuring residual stress of metal materials provided by the embodiment of the utility model;

[0022] Figure 8 It is a schematic diagram of a top cross-sectional structure of a horizontal adjustment member of a drilling device for measuring residual stress of a metal material provided by an embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1. Support assembly; 11. Positioning sleeve; 111. First slide groove; 112. First threaded hole; 12. Support member; 121. Slide plate; 122. Support plate; 123. Second slide groove; 124. First screw; 13. Height adjustment member; 131. Sliding block; 132. Second threaded hole; 133. Second screw; 134. First screw rod; 135. First knob; 136. Locking nut; 137. Base cap; 14. Level adjustment member; 141. Second screw rod; 142. Second knob; 15. Locking ring;

[0025] 2. Centering assembly; 21. Lens tube; 22. Eyepiece;

[0026] 3. Drilling assembly; 31. Turbine drill; 32. Depth gauge; 33. Milling cutter. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] In order to solve the technical problem that when testing some test pieces with obstacles, the base of the test instrument will cause obstruction at the bottom of the instrument and it is difficult to provide stable support, the utility model provides a drilling device for measuring residual stress of metal materials, which can effectively measure test pieces with obstacles, adapt to various measuring positions, can be flexibly adjusted, and has high adaptability.

[0029] See also Figures 1 to 4 The drilling device for measuring residual stress of metal materials includes a support component 1, a centering component 2 and a drilling component 3, wherein the support component 1 includes: a positioning sleeve 11, a plurality of support members 12 and a plurality of height adjustment members 13, wherein the plurality of support members 12 are detachably slidably connected to the peripheral side of the positioning sleeve 11; the plurality of height adjustment members 13 each include a sliding portion slidably connected to the support member 12 and an adjustment portion connected to the sliding portion, wherein the adjustment portion is used to drive the sliding portion to move up and down; wherein the centering component 2 and the drilling component 3 cooperate with the positioning sleeve 11 to perform drilling positioning and drilling respectively.

[0030] In this device, a support component 1, a centering component 2 and a drilling component 3 are provided. The centering component 2 cooperates with the positioning sleeve 11 to adjust the device to align with the measured point, perform drilling positioning, and then use the cooperation between the drilling and the positioning sleeve 11 to drill holes, so as to facilitate residual stress measurement; the support component 1 in this scheme includes a positioning sleeve 11, a plurality of support members 12 and a plurality of height adjustment members 13, and the plurality of support members 12 are detachably slidably connected to the peripheral side of the positioning sleeve 11. For a test piece with obstacles, the support member 12 can be rotated around the peripheral side of the positioning sleeve 11 to adjust the support member 12 to avoid obstacles, thereby effectively measuring the test piece containing obstacles; the height adjustment member 13 is used to support the support member 12, and several of the height adjustment members 13 include a sliding portion, which is slidably connected to the support member 12, so that the position of the height adjustment member 13 can be adjusted by sliding the sliding portion along the support member 12, so that it can adapt to a variety of different measurement positions, for example, the position of a concave test piece with a wide gap or a narrow gap, etc.; the height adjustment member 13 also includes an adjusting portion, which can adjust the sliding portion to move up and down, and then can adjust the height of the support member 12 and the positioning sleeve 11.

[0031] In order to facilitate the adjustment of the centering position of the centering component 2 so as to accurately locate the drilling position, in this embodiment, refer to Figure 1 , Figure 2 and Figure 4A plurality of horizontal adjustment members 14 are provided on the circumferential side of the positioning sleeve 11, and the plurality of horizontal adjustment members 14 are arranged in a circular array. The horizontal adjustment member 14 passes through the side wall of one side wall of the positioning sleeve 11 from the outside of the positioning sleeve 11, and one end thereof extends to the inside of the positioning sleeve 11 to form an adjustment end, and an adjustable adjustment zone is formed between the plurality of adjustment ends. During implementation, the centering component 2 is inserted into the positioning sleeve 11 and placed in the adjustment zone. The position of the adjustment zone can be adjusted by adjusting the extension length of the adjustment end, thereby realizing the adjustment of the position of the centering component 2 so that it is centered on the measured point.

[0032] In one embodiment, see Figure 1 , Figure 2 , Figure 4 and Figure 8 Each of the horizontal adjustment members 14 includes a second screw rod 141 and a second knob 142. The plurality of second screw rods 141 are evenly distributed around the outer side of the positioning sleeve 11. One end of the second screw rod 141 is arranged on the outer side of the positioning sleeve 11, and passes through a side wall of the positioning sleeve 11 from the outer side of the positioning sleeve 11 to extend into the interior of the positioning sleeve 11, so that the adjustment area is formed between the inner ends of the second screw rods 141 for fine-tuning the centering position of the centering component 2. In addition, the second screw rod 141 is threadedly connected to the positioning sleeve 11, and the second knob 142 is connected to one end of the second screw rod 141 located on the outer side of the positioning sleeve 11. Therefore, during implementation, the second knob 142 can be used to rotate the second screw rod 141 inwardly or outwardly, and the position of the centering component 2 can be adjusted by adjusting the length of one end of the second screw rod 141 extending into the positioning sleeve 11.

[0033] It should be noted that, in the present solution, there is no limit on the number of the horizontal adjustment members 14 , and preferably there are four horizontal adjustment members 14 . In other embodiments, the second screw rod 141 may also be a telescopic cylinder or the like.

[0034] In some embodiments, see Figure 1 and Figure 2The support assembly 1 also includes a locking ring 15, the lower end of which is connected to the inner side of the positioning sleeve 11, and after extending into the positioning sleeve 11, it corresponds to the position of the horizontal adjustment member 14, so the position of the centering assembly 2 can be adjusted by adjusting the locking ring 15. The centering assembly 2 includes a lens barrel 21 and an eyepiece 22, and the lens barrel 21 and the eyepiece 22 are connected in sequence on the locking ring 15; the drilling assembly 3 includes a turbine drill 31, a depth gauge 32 and a And a milling cutter 33, the bottom end of the turbine drill 31 is installed with the milling cutter 33, which has one end of the milling cutter 33 extending from the inner side of the top end of the positioning sleeve 11 to the bottom end of the positioning sleeve 11, so as to limit the drilling assembly 3 through the positioning sleeve 11 for precise drilling, and the depth scale 32 is sleeved on the outside of the turbine drill 31, and the outside of the depth scale 32 is provided with scale lines, which is convenient for users to determine the drilling depth according to the scale lines of the depth scale 32, which is conducive to improving the accuracy of measurement.

[0035] During implementation, the position of the drilling device is moved so that the central through hole of the positioning sleeve 11 is adjusted to be close to the measured point, and the second screw 141 is rotated by the second knob 142 to adjust the horizontal position to ensure that the center of the centering component 2 is aligned with the measured point; the drilling component 3 inserts the turbine drill 31 into the positioning sleeve 11 based on the centering result of the centering component 2 and aligns it with the center of the measuring point. A milling cutter 33 is installed at the drill bit position of the turbine drill 31. The transmission part on the top of the turbine drill 31 can be used to connect the motor of the drilling instrument and other equipment. Drilling can be carried out when ready, and the drilling depth is determined according to the depth scale 32 during drilling.

[0036] In order to achieve a stable connection between the support member 12 and the positioning sleeve 11, in this embodiment, please refer to Figures 1 to 7 A first slide groove 111 is provided on the outer side of the positioning sleeve 11, and the first slide groove 111 is an annular groove. The support member 12 partially extends into the interior of the first slide groove 111 and can slide along the first slide groove 111 to realize the rotation of the support member 12 around the positioning sleeve 11.

[0037] In some possible embodiments, the support member 12 includes a slide plate 121 and a support plate 122, wherein the slide plate 121 is partially fitted in the first slide groove 111 and is slidably connected to the first slide groove 111. Specifically, the slide plate 121 is a convex structure, and its protruding portion is fitted in the first slide groove 111 to achieve a sliding connection between the support member 12 and the positioning sleeve 11, and the slide plate 121 is fixedly connected to the positioning sleeve 11 by a first screw 124 that is arranged through it, wherein the top and bottom ends of one side of the slide plate 121 are both threadedly connected with the first screw 124, and the A plurality of first threaded holes 112 are provided on the inner wall of the first slide groove 111 at horizontal positions corresponding to the first screws 124. After the first screws 124 are threadedly connected and penetrate the slide plate 121, they are threadedly connected to one of the corresponding first threaded holes 112, thereby improving the stability of the connection between the support member 12 and the positioning sleeve 11. Since the plurality of first threaded holes 112 are arranged on the inner wall of the first slide groove 111 along the circumference, the support member 12 has a plurality of installation positions along the circumferential side of the positioning sleeve 11, so that when measuring a workpiece to be measured with obstacles, the support structure can avoid the obstacles by utilizing the movable connection of the support member 12.

[0038] Further, the support plate 122 is vertically arranged on the outer side of the slide plate 121, the support plate 122 and the slide plate 121 are integrated, the two form a T-shaped structure, and the support plate 122 extends from the outer side wall of the slide plate 121 along the outer side of the slide plate 121, and the support plate 122 is provided with a second slide groove 123 for sliding connection with the sliding part, and the length direction of the second slide groove 123 is consistent with the length direction of the support plate 122. The sliding part includes a slider 131, and the slider 131 is slidably arranged in the second slide groove 123, and a second screw 133 for locking the slider 131 is threadedly connected between one side of the slider 131 and the support plate 122, and a second threaded hole 132 cooperating with the second screw 133 is provided on the side of the slider 131, so that the position of the slider 131 is fixed by the second screw 133.

[0039] During implementation, the second screw 133 can be loosened according to the situation of the position to be measured, so that the slider 131 can slide inside the second slide groove 123. After the slider 131 slides to a suitable position, the second screw 133 can be tightened to fix the slider 131, thereby adjusting the position of the height adjustment member 13.

[0040] In order to adjust the height of the positioning sleeve 11, in some possible embodiments, please refer to Figure 5 and Figure 6The adjusting part includes a first screw 134, a first knob 135, a locking nut 136 and a base cap 137. The first screw 134 vertically penetrates the slider 131 and is threadedly connected to the slider 131. Therefore, the height of the slider 131 and the support plate 122 can be adjusted by rotating the first screw 134. The bottom end of the first screw 134 is rotatably connected to the base cap 137. The bottom of the base cap 137 is a magnet, which can be magnetically fixed on the metal test piece. The rotation of the first screw 134 will not affect the stable support of the base cap 137. The top of the first screw 134 is connected to the first knob 135. The locking nut 136 is threadedly sleeved on the first screw 134 and is located between the slider 131 and the base cap 137.

[0041] During implementation, the first screw rod 134 is rotated by the first knob 135 to adjust the height of the slider 131, thereby adjusting the height of the support plate 122 and the positioning sleeve 11. After the height is adjusted, the locking nut 136 is rotated to fit with the bottom surface of the support plate 122, so as to achieve pre-tightening and fixing of the slider 131.

[0042] The above embodiments are merely multiple possible implementations of the embodiments of the present application, and the embodiments of the present application are not limited thereto.

[0043] Working principle: During implementation, the drilling device is moved to adjust the central through hole of the positioning sleeve 11 to be close to the measured point. When measuring the workpiece to be measured with obstacles, the first screw 124 can be loosened to allow the slide plate 121 to slide outside the positioning sleeve 11 until the support member 12 avoids the obstacle, and then the first screw 124 is screwed into the corresponding first threaded hole 112 to fix the support member 12. According to the situation of the position to be measured, the second screw 133 can also be loosened to allow the slider 131 to slide inside the second slide groove 123. After the slider 131 slides to a suitable position, the second screw 133 is tightened to fix the slider 131 and adjust the position of the height adjustment member 13. By turning the first knob 1 35. Turn the first screw rod 134 to adjust the height of the slider 131, so that the height of the support plate 122 and the positioning sleeve 11 can be adjusted. After the height is adjusted, the locking nut 136 is turned to fit with the bottom surface of the support plate 122, so as to achieve pre-tightening and fixing of the slider 131. Finally, the second screw rod 141 is rotated by the second knob 142 to adjust the horizontal position to ensure that the center of the centering component 2 is aligned with the measured point. Based on the centering result of the centering component 2, the drilling component 3 inserts the turbine drill 31 into the positioning sleeve 11 and aligns it with the center of the measuring point. The milling cutter 33 is installed at the drill bit position of the turbine drill 31, and the transmission part at the top of the turbine drill 31 is connected to the motor of the drilling instrument and other equipment. Drilling is carried out when ready. The drilling depth is determined according to the depth scale 32.

[0044] The utility model provides a support component 1, a centering component 2 and a drilling component 3, so that the support member 12 can rotate around the circumference of the positioning sleeve 11. Therefore, when measuring a test piece with an obstacle, the position of the support member 12 can be adjusted to avoid the obstacle, so that the test piece containing the obstacle can be effectively measured; the sliding portion of the height adjustment member 13 is slidably connected to the support member 12, so that the position of the height adjustment member 13 can be adjusted by sliding the sliding portion along the support member 12, so that it can adapt to a variety of different measurement positions; the adjusting portion of the height adjustment member 13 can adjust the sliding portion to move up and down, and then can adjust the height of the support member 12 and the positioning sleeve 11; so that the device can be flexibly adjusted, has high adaptability, and ensures the accuracy of detection.

[0045] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A drilling device for measuring residual stress of metal materials, characterized in that: It includes a support assembly, a centering assembly and a drilling assembly, and the support assembly includes: Positioning sleeve; A plurality of support members, wherein the plurality of support members are detachably slidably connected to the peripheral side of the positioning sleeve; and A plurality of height adjustment members, each of which comprises a sliding portion slidably connected to the support member and an adjustment portion connected to the sliding portion, wherein the adjustment portion is used to drive the sliding portion to move up and down; Wherein, the centering assembly and the drilling assembly cooperate with the positioning sleeve to perform drilling positioning and drilling respectively.

2. The drilling device for measuring residual stress of metal materials according to claim 1, characterized in that: A first sliding groove is formed on the outer side of the positioning sleeve along its circumference, and the support member partially extends into the interior of the first sliding groove and is slidably connected to the first sliding groove.

3. The drilling device for measuring residual stress of metal materials according to claim 2, characterized in that: The support member includes a slide plate and a support plate. The slide plate is partially fitted in the first slide groove and is slidably connected to the first slide groove. The slide plate is fixedly connected to the positioning sleeve by a first screw that is arranged through the slide plate. The support plate is vertically arranged on the outer side of the slide plate and extends from the outer side wall of the slide plate along the outer side of the slide plate. A second slide groove is opened on the support plate along its length direction for slidably connecting with the sliding part.

4. The drilling device for measuring residual stress of metal material according to claim 3, characterized in that: The top and bottom ends of one side of the slide plate are both threadedly connected with the first screw, and a plurality of first threaded holes are formed on the inner wall of the first slide groove at horizontal positions corresponding to the first screw along the circumference.

5. The drilling device for measuring residual stress of metal material according to claim 4, characterized in that: The sliding part comprises a sliding block, and the sliding block is slidably arranged in the second sliding groove, and a second screw for locking the sliding block is threadedly connected between one side of the sliding block and the supporting plate.

6. The drilling device for measuring residual stress of metal material according to claim 5, characterized in that: The adjusting part includes a first screw rod, a first knob, a locking nut and a base cap. The first screw rod vertically penetrates the slider and is threadedly connected to the slider. The bottom end of the first screw rod is rotatably connected to the base cap, and the top end is connected to the first knob. The locking nut is arranged between the slider and the base cap and is threadedly sleeved on the first screw rod.

7. The drilling device for measuring residual stress of metal materials according to claim 1, characterized in that: A plurality of horizontal adjustment members are arranged on the circumferential side of the positioning sleeve. The horizontal adjustment members penetrate the side wall of one side wall of the positioning sleeve from the outside of the positioning sleeve, and extend to one end inside the positioning sleeve to form an adjustment end. An adjustable adjustment zone is formed between the plurality of adjustment ends so that the position of the adjustment zone can be adjusted by adjusting the extension length of the adjustment end.

8. The drilling device for measuring residual stress of metal material according to claim 7, characterized in that: Each of the horizontal adjustment members includes a second screw and a second knob. The second screw passes through a side wall of the positioning sleeve from the outside of the positioning sleeve and extends into the positioning sleeve. The second screw is threadedly connected to the positioning sleeve, and the second knob is connected to one end of the second screw located on the outside of the positioning sleeve.

9. The drilling device for measuring residual stress of metal material according to claim 1, characterized in that: The support assembly also includes a locking ring, the centering assembly includes a lens barrel and an eyepiece, the lower end of the locking ring is cooperatively connected with the inner side of the positioning sleeve, and the locking ring is sequentially provided with the lens barrel and the eyepiece connected thereto.

10. The drilling device for measuring residual stress of metal material according to claim 9, characterized in that: The drilling assembly includes a turbine drill, a depth gauge and a milling cutter. The milling cutter is installed at the end of the turbine drill, and one end of the milling cutter extends from the inner side of the top end of the positioning sleeve to the bottom end. The depth gauge is sleeved on the outside of the turbine drill, and scale lines are set on the outside of the depth gauge.

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