CN115922636A - Tool and method for taking out broken-end bolt - Google Patents
Tool and method for taking out broken-end bolt Download PDFInfo
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- CN115922636A CN115922636A CN202211354341.XA CN202211354341A CN115922636A CN 115922636 A CN115922636 A CN 115922636A CN 202211354341 A CN202211354341 A CN 202211354341A CN 115922636 A CN115922636 A CN 115922636A
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Abstract
The invention discloses a taking-out tool and a taking-out method for a broken-end bolt. The invention mainly aims at the difficult problem that the broken end of the bolt is difficult to take out under the conditions of narrow space, difficult drilling of the high-strength bolt and the like which are frequently encountered in the technical field of mechanical equipment maintenance, is suitable for taking out the broken end bolt under various complex environments, has simple structure, is matched with a corresponding taking-out method, is easy to operate in field operation and strong in reliability, and avoids various shutdown faults caused by the broken end bolt.
Description
Technical Field
The invention belongs to the technical field of metallurgical mechanical equipment maintenance, and particularly relates to a tool and a method for taking out a broken-end bolt.
Background
The threaded connection mode is generally used in various industries as a simple and effective connection mode, the existence of bolt connection cannot be lost as long as mechanical equipment exists, the bolt connection mode is as small as one circuit board to be maintained, and the bolt connection mode is as large as various heavy-duty machines, and the bolt connection mode is used as a main connection mode to support the function and operation of the whole equipment. Regular maintenance and repair of various equipment are not required during normal operation of the equipment, as the technical field of mechanical equipment repair, a plurality of connected bolt broken ends are frequently encountered, broken bolts are parts left in equipment threaded holes after the broken ends occur in the using process, the bolts usually generate tensile deformation when being broken, bolt threaded buckles are broken after being axially extruded outwards, broken bolts are divided into two conditions of exposed ends and leakage-free ends, and various shutdown faults can be caused if the broken bolts are not processed in time, so that the broken bolts are timely and reliably taken out, which is particularly important for repair work. The method has the advantages that the broken bolt exposed out of the head is relatively easy to take out, but the broken bolt which is not easy to leak (namely the broken bolt is completely in the threaded hole) is inconvenient to take out, various special tools for taking out the bolt are created along with the improvement of maintenance technology, such as bolt extractors and the like, most of the special tools are taken out in a mode of drilling the broken bolt, the method has certain effect on taking out the bolt, but has great limitation, and for example, under the conditions that the bolt is narrow and the high-strength bolt is not easy to drill, the existing bolt extractor is difficult to realize. Therefore, a reliable bolt taking-out tool is needed to be designed and matched with a proper taking-out method, so that the bolt taking-out tool is suitable for taking out the broken head bolt in various complex environments, the field operation is easy to operate, and the reliability is high.
Disclosure of Invention
The invention provides a reliable tool and a method for taking out broken bolts, aiming at solving the problem that the broken bolts are difficult to take out under the conditions of narrow space, difficult drilling of high-strength bolts and the like, which are frequently encountered in the technical field of mechanical equipment maintenance in the background art.
The technical scheme for solving the technical problem is as follows:
the invention relates to a tool for taking out a broken-end bolt, which comprises a sleeve, wherein an inner hexagonal part is arranged on the inner side of one end of the sleeve, an outer hexagonal part is arranged on the outer side of the other end of the sleeve, a connecting nut which is matched with the inner hexagonal part and has a thickness larger than the depth of the inner hexagonal part is movably arranged on the inner side of the inner hexagonal part, and the size of the connecting nut is smaller than that of the broken-end bolt.
Further, assuming that the dimension of the opposite sides of the inner hexagonal portion is D, the dimension of the opposite sides of the outer hexagonal portion is D, and the specific dimensions of the sleeve 6 of each specification nominal diameter are listed in table 1.
Further, the connecting nut is a common general nut, and the size of the connecting nut is smaller than two types of the diameter of the broken-end bolt, such as: the type of the broken-end bolt is M20, and the type of the connecting nut can be M16.
Further, the sleeve is an aluminum bronze alloy piece.
Furthermore, the telescopic rod also comprises a nail-shaped ejector rod, the length of the rod body of the ejector rod is greater than that of the sleeve, and the section size of the ejector rod is smaller than the inner diameter of the sleeve.
Further, the ejector rod is a 45# steel forging.
The invention relates to a method for taking out a broken-end bolt, wherein the broken-end bolt is positioned in a blind hole of an equipment body and is carried out by using a taking-out tool of the broken-end bolt in the technical scheme, and the method comprises the following steps:
s1, placing a connecting nut into the inner side of the inner hexagonal part of the sleeve and integrally extending into the blind hole, so that the end face of the outer side of the connecting nut is in contact with the broken-end bolt;
s2, welding and fixing the contact position of the connecting nut and the broken-end bolt from the inner ring of the connecting nut through welding equipment;
and S3, screwing the sleeve at the outer hexagonal part of the sleeve by using a wrench, further driving the broken-end bolt to rotate in the blind hole through the connecting nut, and knocking the outer end part of the sleeve by using a hand hammer while screwing the sleeve until the broken-end bolt is taken out.
Furthermore, the connecting nut and the broken-end bolt are welded through a 422 welding rod or a stainless steel welding rod with the diameter less than or equal to 2.5mm, after full welding, the connecting nut and the broken-end bolt are naturally cooled for at least 5 minutes, and the broken-end bolt is hit inwards for a plurality of times by using the ejector rod before welding.
Furthermore, when the sleeve is screwed by a wrench, the sleeve is rotated back and forth by a small amplitude with the rotation angle not exceeding 90 degrees, and then the sleeve is rotated back by 45 degrees in the opposite direction, and the broken-end bolt is taken out from the blind hole repeatedly for a plurality of times.
Further, the outer diameter of the cylinder body of the sleeve is slightly smaller than the inner diameter of the blind hole.
Compared with the prior art, the taking-out tool and the taking-out method for the broken-end bolt have the following advantages:
(1) The tool for taking out the broken-end bolt is simple in structure, small and exquisite and easy to manufacture, and sleeves with corresponding specifications can be manufactured according to specifications of various bolts, so that the tool is convenient to use when broken-end bolts with various specifications are taken out;
(2) The tool for taking out the broken-end bolt can adopt maintenance field tools except the sleeve, is convenient to use in a narrow space, and can be used for processing the broken-end bolt at any mounting position;
(3) The sleeve used in the invention can protect the thread button in the blind hole of the equipment body from being damaged when the connecting nut is welded with the broken bolt, so that the blind hole can be reused conveniently;
(4) The inner hexagonal part at the inner end of the sleeve can enable the connecting nut to be positioned in the middle of the blind hole and welded with the broken-end bolt, and a wrench can be conveniently used for rotating the sleeve at the outer hexagonal part to drive the connecting nut and the broken-end bolt to rotate and take out;
(5) The invention has the advantages of fewer field tools and short operation time, can effectively shorten the time for taking out the broken nuts and installing the bolts, saves the equipment maintenance time and ensures the orderly production.
Drawings
FIG. 1 is a schematic illustration of the present invention in use;
FIG. 2 is a schematic view of the present invention in use (including the stem);
FIG. 3 is a schematic front view of the sleeve of the present invention;
FIG. 4 is a side view of the sleeve of the present invention;
FIG. 5 is a schematic view of a carrier rod according to the present invention;
FIG. 6 is an enlarged view of the welding position of the connecting nut and the break bolt according to the present invention;
in the figure: 1. an apparatus body; 2. blind holes; 3. a broken-end bolt; 4. welding; 5. a connecting nut; 6. a sleeve; 61. an inner hexagonal part; 62. an outer hexagonal part; 7. and a push rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The present invention is not described in detail, but is known to those skilled in the art.
Example 1:
as shown in fig. 1-6, the tool for taking out the broken-end bolt comprises a sleeve 6, wherein the sleeve 6 is easily made of aluminum bronze alloy, an inner hexagonal part 61 is arranged on the inner side of one end of the sleeve 6, an outer hexagonal part 62 is arranged on the outer side of the other end of the sleeve 6, a connecting nut 5 which is matched with the inner hexagonal part 61 and has a thickness larger than the depth of the inner hexagonal part 61 is movably arranged on the inner side of the inner hexagonal part 61, and the size of the connecting nut 5 is smaller than that of the broken-end bolt 3. In this embodiment, the thickness of the coupling nut 5 is greater than the depth of the inner hexagonal portion 61, which facilitates the welding of the coupling nut 5 against the stud bolt 3 through the inner hexagonal portion 61 of the sleeve 6.
In this embodiment, the connecting nut 5 is a common and general hexagon nut, and the size thereof is smaller than two types of the diameters of the broken-end bolt 3, for example: the type of the broken-end bolt is M20, and the type of the connecting nut can be M16.
In the present embodiment, the sleeves 6 of different specifications can be manufactured for the diameters of the bolt 3 of different specifications, and as shown in fig. 3 and 4, the specific dimensions of the sleeve 6 of the nominal diameter of each specification are manufactured with reference to the specifications listed in table 1, assuming that the dimension of the opposite side of the inner hexagonal portion 61 is D, the dimension of the opposite side of the outer hexagonal portion 62 is D, the length of the sleeve 6 is L, and the depth of the inner hexagonal portion 61 is h.
Table 1: specification detail table (mm) for sleeve selection
In this embodiment, the taking out instrument of broken end bolt still including being nail form ejector pin 7, ejector pin 7 is 45# steel forging usually, exists big, little head, and its body of rod length is greater than sleeve 6 length, and its cross sectional dimension is less than sleeve 6 internal diameter for when broken end bolt 3 tensile deformation and take place the adhesion condition with the thread button of blind hole 2 of equipment body, support ejector pin 7 to broken end bolt 3 and strike with the help of hand hammer, sledgehammer etc. for broken end bolt 3 is detained with the thread of blind hole and is separated.
Example 2:
the invention relates to a method for taking out a broken-end bolt, wherein the broken-end bolt 3 is positioned in a blind hole 2 of an equipment body 1, the blind hole 2 is a deep hole which is processed by a drilling machine according to national standards before a threaded hole is processed in the equipment body 1, and after a threaded buckle is processed, the connection can be carried out through a bolt, the method for taking out the broken-end bolt is carried out by using a tool for taking out the broken-end bolt in embodiment 1, and the method comprises the following steps:
s1, placing a connecting nut 5 into the inner side of an inner hexagonal part 61 of a sleeve 6 and integrally extending into a blind hole 2, wherein the outer diameter of a cylinder body of the sleeve 6 is slightly smaller than the inner diameter of the blind hole 2, so that the end face of the outer side of the connecting nut 5 is in contact with a broken-end bolt 3;
s2, welding and fixing the contact part of the connecting nut 5 and the broken-end bolt 3 from the inner ring of the connecting nut 5 through welding equipment to form a welding part 4, wherein the contact part of the inner ring part of the connecting nut 5 and the broken-end bolt 3 is an optimal welding part, the broken-end bolt 3 can be hit inwards for a plurality of times, usually for more than 5 times, through an ejector rod 7 by using a hand hammer or a sledge hammer before welding, so that the deformed broken-end bolt 3 and a thread buckle of the blind hole 2 can be separated during hitting when being adhered, then the broken-end bolt can be welded through a 422 welding rod or a stainless steel welding rod with the diameter less than or equal to 2.5mm, and after full welding, the welding is naturally cooled for at least 5 minutes;
and S3, screwing the sleeve 6 at the outer hexagonal part 62 of the sleeve 6 by using a wrench, further driving the broken-end bolt 3 to rotate in the blind hole 2 through the connecting nut 5, and knocking the outer end part of the sleeve 6 by using a hand hammer while screwing the sleeve 6 until the broken-end bolt 3 is taken out, wherein the wrench is preferably a box wrench.
In this embodiment, the sleeve 6 functions as: firstly, the connecting nut 5 is convenient to position and weld on the end face of the broken-end bolt 3; secondly, the damage to the thread buckle in the blind hole 2 of the equipment body 1 is prevented when the nut 5 and the broken-end bolt 3 are connected in a welding way; thirdly, the connecting nut 5 can be directly rotated by a wrench after being welded, and then the connecting nut 5 is rotated and the broken-end bolt 3 is driven to rotate.
Further, when the sleeve 6 is screwed by a wrench, the bolt is firstly rotated back and forth by a small amplitude with the rotation angle not exceeding 90 degrees, then the bolt is rotated back by 45 degrees in the opposite direction, and the broken-end bolt 3 is taken out from the blind hole 2 repeatedly for a plurality of times.
Claims (10)
1. The utility model provides a broken end bolt's instrument of taking out which characterized in that: the connecting structure comprises a sleeve (6), an inner hexagonal part (61) is arranged on the inner side of one end of the sleeve (6), an outer hexagonal part (62) is arranged on the outer side of the other end of the sleeve (6), a connecting nut (5) which is matched with the inner hexagonal part (61) in a movable mode and is larger than the inner hexagonal part (61) in depth is movably arranged on the inner side of the inner hexagonal part (61), and the size of the connecting nut (5) is smaller than that of the broken-end bolt (3).
2. The tool for removing a stud bolt according to claim 1, wherein: the specific dimensions of the sleeve (6) with the nominal diameter of each specification are shown in the specification table 1, wherein the dimension of the opposite side of the inner hexagonal part (61) is D, the dimension of the opposite side of the outer hexagonal part (62) is D.
3. The tool for removing a stud bolt according to claim 1, wherein: the connecting nut (5) is a common general nut, and the size of the connecting nut is smaller than the two models of the diameter of the broken-end bolt (3).
4. The tool for removing a stud bolt according to claim 1, wherein: the sleeve (6) is an aluminum bronze alloy piece.
5. The tool for removing a broken-end bolt according to any one of claims 1 to 4, wherein: the device also comprises a nail-shaped ejector rod (7), wherein the length of the rod body is greater than that of the sleeve (6), and the section size of the ejector rod is smaller than the inner diameter of the sleeve (6).
6. The tool for removing a stud bolt according to claim 5, wherein: the ejector rod (7) is a No. 45 steel forging.
7. A method for taking out a broken-end bolt, wherein the broken-end bolt (3) is positioned in a blind hole (2) of an equipment body (1), and is characterized in that: the method is carried out by using the tool for removing the broken-end bolt according to any one of claims 1 to 6, and comprises the following steps:
s1, placing a connecting nut (5) into the inner side of an inner hexagonal part (61) of a sleeve (6) and integrally extending into a blind hole (2) so that the outer end face of the connecting nut (5) is in contact with a broken-end bolt (3);
s2, welding and fixing the contact position of the connecting nut (5) and the broken-end bolt (3) from the inner ring of the connecting nut (5) through welding equipment;
s3, a wrench is used for twisting the sleeve (6) at the outer hexagonal part (62) of the sleeve (6), then the broken-end bolt (3) is driven to rotate in the blind hole (2) through the connecting nut (5), the sleeve (6) is twisted, and meanwhile the outer end part of the sleeve (6) is knocked by a hand hammer until the broken-end bolt (3) is taken out.
8. The method for removing a broken-end bolt according to claim 7, characterized in that: the connecting nut (5) and the broken-end bolt (3) are welded through 422 welding rods or stainless steel welding rods with the diameter being less than or equal to 2.5mm, after full welding, natural cooling is carried out for at least 5 minutes, and the broken-end bolt (3) is hit inwards for a plurality of times by using the ejector rod (7) before welding.
9. The method for removing a broken-end bolt according to claim 7, wherein: when the sleeve (6) is screwed by a spanner, the bolt is firstly rotated back and forth by a small amplitude with the rotation angle not exceeding 90 degrees, then the bolt is rotated back by 45 degrees in the opposite direction, and the broken-end bolt (3) is repeatedly taken out from the blind hole (2) for a plurality of times.
10. The method for removing a broken-end bolt according to claim 7, wherein: the outer diameter of the cylinder body of the sleeve (6) is slightly smaller than the inner diameter of the blind hole (2).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202211354341.XA CN115922636A (en) | 2022-11-01 | 2022-11-01 | Tool and method for taking out broken-end bolt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211354341.XA CN115922636A (en) | 2022-11-01 | 2022-11-01 | Tool and method for taking out broken-end bolt |
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CN115922636A true CN115922636A (en) | 2023-04-07 |
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CN202211354341.XA Pending CN115922636A (en) | 2022-11-01 | 2022-11-01 | Tool and method for taking out broken-end bolt |
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2022
- 2022-11-01 CN CN202211354341.XA patent/CN115922636A/en active Pending
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