Staggered hole correcting device and staggered hole correcting method

Abstract

The invention relates to the technical field of mechanical equipment assembling, and discloses a staggered hole correcting device and method.The staggered hole correcting device comprises a positioning shaft and a limiting step, the limiting step extends in the direction opposite to the axial direction of the positioning shaft, a strip-shaped hole penetrating through the positioning shaft and the limiting step is formed in the axial direction of the positioning shaft, and the strip-shaped hole penetrates through the limiting step. The center of the strip-shaped hole coincides with the axis of the positioning shaft, the diameter of the positioning shaft is D, the minimum length of the limiting step extending in the radial direction of the positioning shaft is K, and K is larger than D. The method has the beneficial effects that the wrong hole correction precision is improved, the operation difficulty is reduced, the assembly precision of corrected parts is guaranteed, and the assembly stability of the corrected parts is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment assembly, and in particular to a misaligned hole correction device and a misaligned hole correction method. Background Art

[0002] When assembling or installing mechanical equipment, screws are often used to connect parts with assembly relationships. However, due to processing errors during the processing of the parts, some through holes and screw holes are misaligned, and the screws cannot be inserted into the through holes and connected with the threaded holes. At the same time, some equipment or parts are relatively bulky and difficult to carry to the processing area for reprocessing of the holes.

[0003] At present, the common correction methods are divided into two categories. One is to use welding tools to fill the misaligned through holes, and then use hole-opening tools to re-open the holes. The process is complicated and the re-opening precision is low. In addition, during the welding process, the position of the parts close to the welding point is easily affected by the high temperature of welding, which is prone to thermal deformation, resulting in damage to the internal structure of the parts and affecting the overall structural strength of the parts. The other is to expand the hole, using a drill bit larger than the through hole to expand the hole to form a mounting hole, and then the screw with a larger gasket is passed through the mounting hole to connect with the threaded hole. Since the aperture of the mounting hole after expansion is larger than the aperture of the original through hole, the gap between the outer wall of the screw and the inner wall of the mounting hole is large. When the parts are subjected to the force along the radial direction of the screw, the assembly position between the parts is easy to move, and the assembly precision is low. Summary of the invention

[0004] The purpose of the present invention is to provide a misaligned hole correction device and a misaligned hole correction method, so as to improve the misaligned hole correction accuracy, reduce the operation difficulty, ensure the assembly accuracy of the parts after correction, and improve the stability of the parts assembly after correction.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a misaligned hole correction device, including a positioning shaft and a limiting step, the limiting step extending axially away from the positioning shaft, the positioning shaft is axially provided with a strip hole passing through the positioning shaft and the limiting step, the center of the strip hole coincides with the axis of the positioning shaft, the diameter of the positioning shaft is D, and the minimum length of the limiting step extending radially along the positioning shaft is K, K>D.

[0006] Furthermore, the thickness of the limiting step is B, and B≥1.5 mm.

[0007] Furthermore, the minimum spacing between the circumferential outer wall of the limiting step and the outer wall of the positioning shaft is C, and C is ≥ 1.5 mm.

[0008] Furthermore, the cross-sectional shape of the misaligned hole correction device along the axial direction is T-shaped.

[0009] Furthermore, a strip-shaped countersunk hole is formed at one end of the strip-shaped hole facing the limiting step.

[0010] The present invention also provides a misaligned hole correction method, which uses any of the misaligned hole correction devices described above to correct misaligned holes, and is used to connect a first connecting member with a second connecting member, wherein the first connecting member is provided with a threaded hole, and the second connecting member is provided with a through hole that is misaligned with the threaded hole in a first direction, comprising the following steps:

[0011] S1. In the first direction, the through hole is coaxially expanded to form a mounting hole, and in the first direction, the threaded hole is arranged within the projection range of the mounting hole;

[0012] S2, installing the misaligned hole correction device in the mounting hole, the positioning shaft is arranged in the mounting hole, the end surface of the limiting step facing the positioning shaft is in contact with the end surface of the mounting hole away from the first connecting member, and the width W of the strip hole is greater than the diameter d of the threaded hole;

[0013] S3. Rotate the misaligned hole correction device in a first direction so that the threaded hole is located within the projection range of the strip hole, insert a screw into the strip hole, and the screw passes through the strip hole and is connected to the threaded hole, so that the misaligned hole correction device, the second connecting member and the first connecting member are fixedly connected.

[0014] Furthermore, the outer diameters of the mounting hole and the positioning shaft are both D, the length of the strip hole is L, and DL≥1 mm.

[0015] Furthermore, the hole depth of the mounting hole is m, the length of the positioning shaft is n, and 0≤mn≤1mm.

[0016] Furthermore, the axis of the mounting hole coincides with the center of the strip-shaped hole, the distance between the threaded hole and the center of the mounting hole is A, the length of the strip-shaped hole is L, and A≤0.5L.

[0017] Furthermore, Wd≤0.1 mm is satisfied.

[0018] Compared with the prior art, the misaligned hole correction device and misaligned hole correction method of the embodiment of the present invention have the following beneficial effects: after the through hole is expanded to form a mounting hole, the misaligned hole correction device is installed in the mounting hole, the misaligned hole correction device is provided with a positioning shaft and a limiting step, and the misaligned hole correction device is provided with a strip hole along the axial direction. When the misaligned hole correction device is installed, the positioning shaft is inserted into the mounting hole, which is easy to position the screw and the first connecting member and the second connecting member during installation, thereby improving the installation accuracy between the two parts. At the same time, when the second connecting member is subjected to the radial force of the screw, the positioning shaft fits with the inner wall of the mounting hole to avoid the position movement between the first connecting member and the second connecting member. In addition, the diameter of the positioning shaft is D, and the minimum length of the limiting step extending along the radial direction of the positioning shaft is K, K>D, and the limiting step presses and limits the installation of the second connecting member, thereby improving the stability of part assembly after the misaligned hole is corrected. In addition, since the misaligned hole correction device is provided with a strip hole, the width W of the strip hole is greater than the diameter d of the threaded hole. After the misaligned hole correction device is installed, the misaligned hole correction device is rotated in a first direction so that the threaded hole can always be located within the projection range of the strip hole. Subsequently, a screw is inserted into the strip hole, and the screw passes through the strip hole and is connected to the threaded hole, so that the misaligned hole correction device, the second connecting member and the first connecting member are fixedly connected. The position of the misaligned hole correction device is easy to adjust, thereby improving the correction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a top view of a misaligned hole correction device according to an embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of a misaligned hole correction device according to an embodiment of the present invention;

[0021] Figure 3 2 is a front view of a misaligned hole correction device according to an embodiment of the present invention;

[0022] Figure 4 is another structural schematic diagram of the misaligned hole correction device according to an embodiment of the present invention;

[0023] Figure 5 2 is a schematic diagram of the installation of the misaligned hole correction device according to an embodiment of the present invention;

[0024] Figure 6 is a partial cross-sectional view of a second connecting member according to an embodiment of the present invention;

[0025] Figure 7 This is a reference diagram for use of the misaligned hole correction device according to an embodiment of the present invention;

[0026] Figure 8 It is a process flow chart of the misaligned hole correction method according to an embodiment of the present invention.

[0027] In the figure, 1, first connecting member; 11, threaded hole; 2, second connecting member; 21, through hole; 22, mounting hole; 3, misaligned hole correction device; 31, positioning shaft; 32, limiting step; 321, rotating groove; 33, strip hole; 34, strip countersunk hole; 4, screw. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. used in the present invention to indicate the orientation or positional relationship are based on the positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred devices and elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, it should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0031] like Figures 1 to 8 As shown, a misaligned hole correction device of a preferred embodiment of the present invention is installed in the mounting hole after the hole is expanded, and is used to replace the gasket worn on the screw when the first connecting member is connected to the second connecting member, so as to improve the assembly accuracy between the first connecting member and the second connecting member. The device comprises a positioning shaft and a limiting step, wherein the limiting step extends away from the axial direction of the positioning shaft, and the axial direction of the positioning shaft is provided with a strip hole penetrating the positioning shaft and the limiting step, and the center of the strip hole coincides with the axial center of the positioning shaft, such as Figure 1 As shown, the center of the strip hole is defined as the intersection point o of the center lines of the strip hole along the length direction and the width direction, see Figures 2 to 4 The diameter of the positioning shaft is D, and the minimum length of the limiting step extending radially along the positioning shaft is K. In order to enable the second connecting member to be pressed by the misaligned hole correction device after the screw is locked, K>D.

[0032] The present invention also provides a method for correcting a misaligned hole, which is used to connect a first connecting member 1 with a second connecting member 2. Figure 8As shown in (a), the second connecting member 2 is arranged on the first direction X of the first connecting member 1, and the first connecting member 1 is provided with a threaded hole 11. In this embodiment, the axial direction of the threaded hole 11 is defined as the first direction X. Due to a processing error, the second connecting member 2 is provided with a through hole 21 which is misaligned with the threaded hole 11 in the first direction X. In order to facilitate the fixed connection between the first connecting member 1 and the second connecting member 2 by means of a screw 4, and to improve the correction accuracy by means of a misaligned hole correction device, the following steps are included:

[0033] S1. In the first direction X, the through hole 21 is coaxially expanded to form a mounting hole 22, and the threaded hole 11 is arranged within the projection range of the mounting hole 22 in the first direction X;

[0034] S2. Install the misaligned hole correction device 3 in the mounting hole 22. The positioning shaft 31 is disposed in the mounting hole 22. The end surface of the limiting step 32 facing the positioning shaft 31 is in contact with the end surface of the mounting hole 22 away from the first connecting member 1. The width W of the strip hole 33 is greater than the diameter d of the threaded hole 11.

[0035] S3. Rotate the misaligned hole correction device in the first direction X so that the threaded hole 11 is within the projection range of the strip hole, insert a screw 4 into the strip hole, and the screw 4 passes through the strip hole 33 and is connected to the threaded hole 11, so that the misaligned hole correction device 3, the second connecting member 2 and the first connecting member 1 are fixedly connected.

[0036] In this embodiment, the function of the strip hole 33 is completely different from that of the strip hole in the prior art. In the prior art, the function of the strip hole is mainly that the screw can slide in the length direction of the strip hole, which is convenient for adjusting the installation distance between the two parts. In the present application, the strip hole 33 is provided to facilitate the rotation of the misaligned hole correction device 3. In the first direction X, the threaded hole 11 can always be located within the projection range of the strip hole 33, which is convenient for the installation of the screw 4.

[0037] Among them, in step S1, if Figure 8 As shown in (b), the through hole 21 is generally expanded by installing a drill bit or a reamer with an electric drill to form a mounting hole 22. After expansion, the threaded hole 11 can be completely within the projection coverage of the mounting hole 22 in the first direction X, which is convenient for installing the screw 4. In order to avoid burrs on the inner wall of the mounting hole 22 after expansion, which is not conducive to the installation of the misaligned hole correction device 3, the inner wall and end face of the mounting hole 22 can be deburred by an electric grinding head after expansion, so that the two end faces and the inner wall of the mounting hole 22 remain smooth.

[0038] In the prior art, after the mounting hole 22 is formed by expanding the hole, a gasket is generally added to the screw 4, and the locking screw 4 squeezes the gasket to fix the second connecting member 2 and the first connecting member 1. Since the aperture of the mounting hole is larger after the hole is expanded, the gap between the outer wall of the screw 4 and the inner wall of the mounting hole 22 is increased. When the second connecting member 2 is subjected to a force along the radial direction of the screw 4, the position between the second connecting member 2 and the first connecting member 1 is easily moved, resulting in assembly misalignment, affecting the normal use of the equipment. Therefore, in step S2, a misaligned hole correction device 3 is installed in the mounting hole 22. Specifically, the positioning shaft 31 is inserted into the mounting hole 22 for installation and positioning of the misaligned hole correction device 3. At the same time, the side wall of the positioning shaft 31 fits with the inner wall of the mounting hole 22, which is beneficial to the positioning of the second connecting member 2 and the first connecting member 1 during installation. In addition, refer to Figure 2 The end face of the limiting step facing the positioning shaft 31 is in contact with the end face of the through hole 21 away from the first connecting member 1, so as to press the misaligned hole correction device 3 and the second connecting member 2 together. The misaligned hole correction device 3 is provided with a strip hole 33 axially passing through the positioning shaft 31 and the limiting step 32. In order to facilitate the insertion of the screw 4 into the strip hole 33 and connect it with the threaded hole 11, the width W of the strip hole 33 must be greater than the diameter d of the threaded hole 11.

[0039] In step S3, refer to Figure 8 (c) After the misaligned hole correction device 3 is installed, in order to adjust the alignment between the strip hole 33 and the threaded hole 11 to facilitate the installation of the screw 4, the misaligned hole correction device 3 is rotated counterclockwise or clockwise in the first direction X so that the threaded hole 11 can always be located within the projection coverage range of the strip hole 33, that is, the threaded hole 11 is located directly below the strip hole 33, and then the screw 4 can be installed. The overall operation process is simple and can be used in scenarios where multiple through holes 21 and threaded holes 11 are misaligned.

[0040] Furthermore, in some embodiments, in order to ensure the structural strength of the misaligned hole correction device 3, the misaligned hole correction device 3 can be made of metal materials such as aluminum or stainless steel. Figures 3 to 8 , the outer diameters of the mounting hole 22 and the positioning shaft 31 are both D, the length of the strip hole 33 is L, DL≥1mm, that is, the wall thickness between the positioning shaft 31 and the strip hole 33 is at least 0.5mm, so that the misaligned hole correction device 3 has a certain structural strength, and at the same time avoids damage to the misaligned hole correction device 3 during processing. Furthermore, in order to facilitate the processing of the misaligned hole correction device 3, the cross-sectional shape of the misaligned hole correction device 3 along the axial direction is T-shaped. In some embodiments, the cross-sectional shape of the limiting step 32 set in the axial direction of the vertical positioning shaft 31 can be set according to actual assembly requirements, generally rectangular or polygonal or circular or elliptical. Preferably, in this embodiment, the cross-sectional shape of the limiting step 32 is circular, which can make the locking force transmitted by the screw 4 to the second connecting member 2 through the misaligned hole correction device 3 more uniform, that is, the limiting step 32 is cylindrical in shape, and its outer diameter is K.

[0041] Furthermore, after the misaligned hole correction device 3 is installed, in order to ensure that the screw 4 can be installed, the misaligned hole correction device 3 can be pressed to lock the second connecting member 2, the hole depth of the mounting hole 22 is m, and the length of the positioning shaft 31 is n, which satisfies 0≤mn≤1mm. If the length n of the positioning shaft 31 is greater than m, the second connecting member 2 cannot be locked. If the length n of the positioning shaft 31 is much smaller than the depth m of the mounting hole 22, the length of the positioning shaft 31 extending into the mounting hole 22 is too short, resulting in a low positioning accuracy between the misaligned hole correction device 3 and the mounting hole 22, affecting the assembly accuracy between the second connecting member 2 and the first connecting member 1.

[0042] Furthermore, in the process of rotating the misaligned hole correction device 3, in the first direction X, it is necessary to ensure that the threaded hole 11 can be within the projection coverage of the strip hole 33. In this embodiment, the center of the mounting hole 22 coincides with the center of the strip hole 33, the distance between the center of the threaded hole 11 and the center of the mounting hole 22 is A, and the length of the strip hole 33 is L, satisfying A≤0.5L. Specifically, since A is the maximum offset from the threaded hole 11 to the center of the hole, and L is the total length of the strip hole 33, when A is less than or equal to half of L, in the first direction X, any position of the threaded hole 11 during the rotation of the misaligned hole correction device 3 will be covered by the strip hole 33. If A is greater than 0.5L, then in certain rotation positions, the threaded hole 11 will completely leave the coverage of the strip hole 33, resulting in the inability to install the screw 4 or poor locking effect.

[0043] Furthermore, in order to further improve the assembly accuracy between the second connecting member 2 and the first connecting member 1, refer to Figure 6 , the width of the strip hole 33 is W, and the diameter d of the threaded hole 11 satisfies Wd≤0.1mm. If the width W of the strip hole 33 is too wide or the diameter d of the threaded hole 11 is too small, the screw 4 may be tilted or offset when tightened, reducing the stability of the connection.

[0044] Furthermore, since the locking force of the screw 4 acts directly on the limiting step 32, when the screw 4 is tightened, if the limiting step 32 is too thin, it will cause the limiting step 32 to deform or be damaged. Therefore, in this embodiment, the thickness B of the limiting step 32 is greater than or equal to 1.5 mm.

[0045] Furthermore, in order to prevent the head of the screw 4 from being exposed after the screw 4 is locked, which may affect the appearance or cause safety hazards, a strip countersunk hole 34 is provided at one end of the strip hole 33 facing the limiting step 32, and the depth of the strip countersunk hole 34 is greater than the thickness of the head of the screw 4. Furthermore, since the overall size of the misaligned hole correction device 3 is smaller than that of the second connecting member 2 and the first connecting member 1, the positioning shaft 31 of the misaligned hole correction device 3 is installed in the installation hole 22, which makes it inconvenient to rotate the misaligned hole correction device 3. Therefore, in this embodiment, refer to Figure 5 A rotation groove 321 is provided at one end of the limiting step 32 away from the positioning shaft 31. The shape of the rotation groove 321 can be a cross or a flat head, and can be rotated by a cross screwdriver or a flat head screwdriver, thereby improving the installation efficiency of the misaligned hole correction device 3.

[0046] Furthermore, since the screw 4 fixes the second connecting member 2 to the first connecting member 1 by locking the misaligned hole correction device 3, in order to increase the contact area between the misaligned hole correction device 3 and the second connecting member 2 and increase the friction between the misaligned hole correction device 3 and the second connecting member 2, the minimum spacing between the circumferential outer wall of the limiting step 32 and the outer wall of the positioning shaft 31 is C, C ≥ 1.5mm.

[0047] Further, in order to facilitate the guidance of the positioning shaft 31 when it is installed in the mounting hole 22, refer to Figure 4 A guiding slope is provided on one end of the positioning shaft 31 facing the first connecting member 1 .

[0048] In summary, the embodiment of the present invention provides a method for correcting misaligned holes. After the through hole 21 is expanded to form the mounting hole 22, a misaligned hole correction device 3 is installed in the mounting hole 22. The misaligned hole correction device 3 is provided with a positioning shaft 31 and a limiting step 32, and the misaligned hole correction device 3 is provided with a strip hole 33 along the axial direction. When the misaligned hole correction device 3 is installed, the positioning shaft 31 is inserted into the mounting hole 22, which is easy to position the screw 4 when it is installed with the first connecting member 1 and the second connecting member 2, thereby improving the installation accuracy between the two parts. At the same time, when the second connecting member 2 is subjected to the radial force of the screw 4, the positioning shaft 31 fits with the inner wall of the mounting hole 22 to avoid the position between the first connecting member 1 and the second connecting member 2 from moving. In addition, the diameter of the positioning shaft 31 is D, and the minimum length of the limiting step 32 extending along the radial direction of the positioning shaft 31 is K, K>D, and the limiting step 32 presses and limits the installation of the second connecting member 2, thereby improving the stability of the part assembly after correction. In addition, since the misaligned hole correction device 3 is provided with a strip hole 33, the width W of the strip hole 33 is greater than the diameter d of the threaded hole 11, after the misaligned hole correction device 3 is installed, the misaligned hole correction device 3 is rotated so that the threaded hole 11 is located directly below the strip hole 33, and then the screw 4 is inserted into the strip hole 33, and the screw 4 passes through the strip hole 33 and is connected to the threaded hole 11, so that the misaligned hole correction device 3, the second connecting member 2 and the first connecting member 1 are fixedly connected, and the position of the misaligned hole correction device 3 is convenient to adjust, thereby improving the correction efficiency.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A misaligned hole correction device, characterized in that: It includes a positioning shaft and a limiting step, the limiting step extends axially away from the positioning shaft, the positioning shaft is axially provided with a strip hole penetrating the positioning shaft and the limiting step, the center of the strip hole coincides with the axis of the positioning shaft, the diameter of the positioning shaft is D, and the minimum length of the limiting step extending radially along the positioning shaft is K, K>D.

2. The misaligned hole correction device according to claim 1, characterized in that: The thickness of the limiting step is B, where B≥1.5 mm.

3. The misaligned hole correction device according to claim 1, characterized in that: The minimum distance between the circumferential outer wall of the limiting step and the outer wall of the positioning shaft is C, and C is ≥ 1.5 mm.

4. The misaligned hole correction device according to claim 1, characterized in that: The cross-sectional shape of the misaligned hole correction device along the axial direction is T-shaped.

5. The misaligned hole correction device according to claim 1, characterized in that: A strip-shaped countersunk hole is formed at one end of the strip-shaped hole facing the limiting step.

6. A method for correcting misaligned holes, using the misaligned hole correction device according to any one of claims 1 to 5 to correct misaligned holes, for connecting a first connecting member with a second connecting member, wherein the first connecting member is provided with a threaded hole, and the second connecting member is provided with a through hole that is misaligned with the threaded hole in a first direction, characterized in that: The following steps are involved: S1. In the first direction, the through hole is coaxially expanded to form a mounting hole, and in the first direction, the threaded hole is arranged within the projection range of the mounting hole; S2, installing the misaligned hole correction device in the mounting hole, the positioning shaft is arranged in the mounting hole, the end surface of the limiting step facing the positioning shaft is in contact with the end surface of the mounting hole away from the first connecting member, and the width W of the strip hole is greater than the diameter d of the threaded hole; S3. Rotate the misaligned hole correction device in a first direction so that the threaded hole is located within the projection range of the strip hole, insert a screw into the strip hole, and the screw passes through the strip hole and is connected to the threaded hole, so that the misaligned hole correction device, the second connecting member and the first connecting member are fixedly connected.

7. The method for correcting misaligned holes according to claim 6, characterized in that: The outer diameters of the mounting hole and the positioning shaft are both D, the length of the strip hole is L, and DL≥1mm.

8. The method for correcting a misaligned hole according to claim 6, characterized in that: The depth of the mounting hole is m, the length of the positioning shaft is n, and 0≤mn≤1mm.

9. The method for correcting a misaligned hole according to claim 6, characterized in that: The axis of the mounting hole coincides with the center of the strip hole, the distance between the threaded hole and the center of the mounting hole is A, the length of the strip hole is L, and A≤0.5L.

10. The method for correcting a misaligned hole according to claim 6, wherein: Satisfy Wd≤0.1mm.

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