CN114857156A - Double-positioning thread assembly structure and method - Google Patents

Double-positioning thread assembly structure and method Download PDF

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Publication number
CN114857156A
CN114857156A CN202210467765.0A CN202210467765A CN114857156A CN 114857156 A CN114857156 A CN 114857156A CN 202210467765 A CN202210467765 A CN 202210467765A CN 114857156 A CN114857156 A CN 114857156A
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CN
China
Prior art keywords
positioning
piece
thickness
matching surface
matching
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210467765.0A
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Chinese (zh)
Inventor
李兴伟
徐勇
袁咏心
刘丹丹
周海
肖平
尙尔京
王淇
陈鹏
尤志强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Sinopec Oilfield Equipment Corp
Original Assignee
Kingdream PLC
Sinopec Oilfield Equipment Corp
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Publication date
Application filed by Kingdream PLC, Sinopec Oilfield Equipment Corp filed Critical Kingdream PLC
Priority to CN202210467765.0A priority Critical patent/CN114857156A/en
Publication of CN114857156A publication Critical patent/CN114857156A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/06—Screwed connections specially modified in view of tensile load; Break-bolts having regard to possibility of fatigue rupture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object

Abstract

The application relates to a double-positioning thread assembly structure and a method, which comprises the following steps: the first connecting piece comprises a shaft body and a connecting shaft connected to the end part of the shaft body, a first positioning surface is formed between the circumferential edge of the end surface of the shaft body and the circumferential edge of the end surface of the connecting shaft on the inner side of the shaft body, external threads are arranged on the outer wall of the circumferential side of the connecting shaft, and a second positioning surface is formed on the end surface, far away from the shaft body, of the connecting shaft; the second connecting piece is provided with an inserting groove, the outer wall of the second connecting piece on the periphery of the inserting groove is provided with a first matching surface, an internal thread corresponding to the external thread is arranged in the inserting groove, and the bottom surface of the inserting groove forms a second matching surface; the first positioning surface and the first matching surface are indirectly abutted through a first positioning piece arranged between the first positioning piece and the first matching surface through a gasket, the second positioning surface and the second matching surface are directly abutted, or the first positioning surface and the first matching surface are directly abutted, and the second positioning surface and the second matching surface are indirectly abutted through a second positioning piece arranged between the second positioning piece and the second matching surface through a gasket. The pre-tightening force is improved, the loosening and the breakage of the threads are effectively prevented, and the service life of the integral structure is prolonged.

Description

Double-positioning thread assembly structure and method
Technical Field
The application relates to the technical field of thread assembly, in particular to a double-positioning thread assembly structure and a double-positioning thread assembly method.
Background
Threaded connections (structures) are commonly used on a variety of industrial products and equipment. A conventional threaded connection, as shown in fig. 1 and 2, generally includes a male threaded part 0-1 and a female threaded part 0-2, wherein the male threaded part 0-1 and the female threaded part 0-2 are generally engaged by only one pair of positioning surfaces 0-3 during screwing.
However, the single positioning surface threaded connection device has uneven thread stress, requires larger pretightening force for preventing the threads from loosening, further increases the stress level of the threads, and can only keep lower pretightening force for reducing the stress level, so that the phenomena of thread breakage and loosening are frequently seen in the connection device, and huge economic loss and potential safety hazard are brought to users.
Disclosure of Invention
The embodiment of the application provides a double-positioning thread assembling structure and a double-positioning thread assembling method, and aims to solve the problems that in the thread assembling in the related technology, a single positioning surface is difficult to simultaneously guarantee pretightening force and reduce stress level, and further the phenomena of thread breakage and loosening frequently occur in a connecting device.
In a first aspect, a double-positioning thread assembly structure is provided, which adopts the following technical scheme:
a dual-positioning threaded fitting structure, comprising:
the first connecting piece comprises a shaft body and a connecting shaft connected to the end part of the shaft body, a first positioning surface is formed between the circumferential edge of the end surface of the shaft body and the circumferential edge of the end surface of the connecting shaft on the inner side of the circumferential edge of the end surface of the shaft body, external threads are arranged on the outer wall of the circumferential side of the connecting shaft, and a second positioning surface is formed on the end surface of the connecting shaft far away from the shaft body;
the second connecting piece is provided with an inserting groove, the outer wall of the second connecting piece on the periphery of the inserting groove is provided with a first matching surface, an internal thread corresponding to the external thread is arranged in the inserting groove, and the bottom surface of the inserting groove forms a second matching surface;
the first positioning surface and the first matching surface are indirectly abutted through a first positioning piece arranged between the first positioning surface and the first matching surface in a cushioning manner, the second positioning surface and the second matching surface are directly abutted, or,
the first positioning surface directly abuts against the first matching surface, and the second positioning surface indirectly abuts against the second matching surface through a second positioning piece arranged between the first positioning surface and the second matching surface.
In some embodiments, the length of the connecting shaft is greater than the depth of the inserting groove, the first positioning surface and the first matching surface indirectly abut against each other through the first positioning member, and the second positioning surface directly abuts against the second matching surface.
In some embodiments, the length of the connecting shaft is smaller than the depth of the inserting groove, the first positioning surface directly abuts against the second matching surface, and the second positioning surface indirectly abuts against the second matching surface through the second positioning member.
In some embodiments, an observation hole communicated to the outside of the second connector is formed in a circumferential inner wall of the bottom of the plug groove, so that the observation hole can be used for observation or measurement when a gap exists between the second positioning surface and the second matching surface.
In some embodiments, the connection shaft comprises:
a connection section connected with the shaft body;
the threaded section is arranged on one side, away from the shaft body, of the connecting section, and the external thread is arranged on the circumferential outer wall of the connecting section;
the transition section is connected with the connecting section and the thread section, and the circumferential outer wall of the transition section is arranged in a concave curved surface manner.
In some embodiments, the thread section is circumferentially provided with a stress reducing bevel near the end of the transition section, and the stress reducing bevel gradually decreases in diameter in the direction near the transition section.
In a second aspect, the application provides a double-positioning thread assembly method, which adopts the following technical scheme:
a method of assembling a double-locating thread comprising the steps of:
judging whether the length of the connecting shaft of the first connecting piece is greater than the depth of the inserting groove of the second connecting piece;
if the depth of the connecting shaft is larger than the depth of the inserting groove, a measuring pad is sleeved outside the connecting shaft, and the first connecting piece and the second connecting piece are subjected to threaded assembly according to a first preset torque requirement, so that two sides of the first positioning piece are completely attached to the first positioning surface and the first matching surface, and an adjusting gap is formed between the second positioning surface and the second matching surface;
measuring the distance of the adjusting gap, calculating by combining the thickness of the measuring pad to obtain the thickness of the positioning piece, and processing according to the thickness of the positioning piece to obtain a first positioning piece;
sleeving the obtained first positioning piece outside the connecting shaft, and carrying out threaded assembly on the first connecting piece and the second connecting piece according to a second preset torque requirement, so that two sides of the first positioning piece are completely attached to the first positioning surface and the first matching surface, and the second positioning surface is completely attached to the second matching surface;
if the depth of the inserting groove is smaller than the depth of the inserting groove, the first connecting piece and the second connecting piece are subjected to threaded assembly according to a third preset torque requirement, so that the first positioning surface is attached to the first matching surface, and an adjusting gap is formed between the second positioning surface and the second matching surface;
measuring the adjusting clearance, calculating to obtain the thickness of a second positioning piece, and processing to obtain the second positioning piece according to the calculated thickness of the positioning piece;
placing the obtained second positioning piece between the second positioning surface and the second matching surface, and carrying out threaded assembly on the first connecting piece and the second connecting piece according to a fourth preset torque requirement to enable the first positioning surface and the first matching surface to be completely attached, wherein two sides of the second positioning piece are completely attached to the second positioning surface and the second matching surface.
In some embodiments, the measurement of the distance between the adjustment gaps is performed, the thickness of the first positioning element is calculated by combining the thickness of the measurement pad, and the thickness of the first positioning element is processed according to the thickness of the first positioning element, where the thickness of the first positioning element is the measurement pad thickness-the distance between the adjustment gaps-a first set error;
and measuring the adjusting gap, calculating to obtain the thickness of the second positioning piece, and processing according to the calculated thickness of the second positioning piece to obtain the thickness of the second positioning piece, wherein the thickness of the second positioning piece is equal to the distance between the adjusting gap and a second set error.
In some embodiments, the measurement of the distance between the adjustment gaps is performed, the thickness of the first positioning element is calculated by combining the thickness of the measurement pad, the first positioning element is processed according to the thickness of the first positioning element, the adjustment gap is measured, the thickness of the second positioning element is calculated, the second positioning element is processed according to the thickness of the second positioning element, and the distance between the adjustment gaps is measured through an observation duct communicating the bottom area of the insertion groove with the external space of the second connecting element.
In some embodiments, the distance between the adjustment gaps is measured, the thickness of the first positioning element is calculated by combining the thickness of the measurement pad, and the first positioning element is machined according to the thickness of the first positioning element, where the first positioning element is the shortened measurement pad.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a double-positioning threaded assembly structure and a double-positioning threaded assembly method, after the first connecting piece and the second connecting piece are assembled and connected, the first positioning surface and the first matching surface on the first connecting piece and the second connecting piece are directly or indirectly abutted, and the second positioning surface and the second matching surface are also directly or indirectly abutted, so that double-side positioning of the first connecting piece and the second connecting piece is realized, when a connecting shaft of the first connecting piece is assembled into an insertion groove through threads, stress borne by the connecting shaft can be shared on the whole connecting shaft and a shaft body more uniformly, the level of thread stress is effectively reduced, and furthermore, when the thread stress is reduced, the pre-tightening force borne by the first connecting piece when the first connecting piece is assembled into the second connecting piece is remarkably improved. Finally, the effect of effectively reducing and dispersing the stress of the upper threads of the first connecting piece is achieved while the assembling pretightening force of the first connecting piece is improved, so that the performance of preventing the threads from loosening and breaking is improved, and the service life of the integral connecting structure is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a drawing I of the background art;
FIG. 2 is a drawing II of the background art;
FIG. 3 is a schematic view of an assembly structure when the length of the connecting shaft is greater than the depth of the inserting groove;
FIG. 4 is a schematic view of an assembly structure when the length of the connecting shaft is smaller than the depth of the inserting groove;
FIG. 5 is a schematic structural view of a first connecting member;
FIG. 6 is an enlarged view of area A of FIG. 5;
FIG. 7 is a simplified schematic diagram of step S210 of the dual-orientation thread make-up method provided herein;
FIG. 8 is a simplified schematic diagram of step S220 of the dual set thread make-up method provided herein;
FIG. 9 is a simplified schematic diagram of steps S211 and S221 in another embodiment of the present application;
FIG. 10 is a simplified schematic illustration of step S210 in another embodiment of the present application;
FIG. 11 is a schematic view of a stress distribution of a dual-orientation thread assembly provided herein;
FIG. 12 is a schematic of the stress distribution of a single location thread makeup.
In the figure:
1. a first connecting member; 10. a shaft body; 11. a connecting shaft; 110. a connecting section; 111. a threaded segment; 1110. a stress-reducing bevel; 112. a transition section; 12. a first positioning surface; 13. a second positioning surface;
2. a second connecting member; 20. inserting grooves; 21. a first mating surface; 22. a second mating surface; 23. observing the pore channel;
3. a first positioning member;
4. a second positioning member;
5. a measuring pad;
6. adjusting the clearance;
7. and (4) supplementing the cushion.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
The embodiment of the application provides a double-positioning thread assembly structure and a double-positioning thread assembly method, which can solve the problems that in the thread assembly in the related art, a single positioning surface is difficult to ensure pretightening force and reduce stress level at the same time, and further the connection device is frequently broken and loosened.
Referring to fig. 3 and 4, in a first aspect, an embodiment of the present application provides a dual-positioning threaded fitting structure, which includes:
the first connecting piece 1 comprises a shaft body 10 and a connecting shaft 11 connected to the end part of the shaft body 10, a first positioning surface 12 is formed between the end surface peripheral edge of the shaft body 10 and the end surface peripheral edge of the connecting shaft 11 on the inner side of the shaft body, external threads are arranged on the outer wall of the peripheral side of the connecting shaft 11, and a second positioning surface 13 is formed on the end surface of the connecting shaft 11 far away from the shaft body 10;
the second connecting piece 2 is provided with an inserting groove 20, the outer wall of the second connecting piece 2 on the periphery of the inserting groove 20 is provided with a first matching surface 21, an internal thread corresponding to the external thread is arranged in the inserting groove 20, and a second matching surface 22 is formed on the bottom surface of the inserting groove 20;
the first positioning surface 12 and the first matching surface 21 are indirectly abutted through the first positioning piece 3 which is arranged between the first positioning surface and the first matching surface, the second positioning surface 13 and the second matching surface 22 are directly abutted, or,
the first positioning surface 12 and the first matching surface 21 directly abut against each other, and the second positioning surface 13 and the second matching surface 22 indirectly abut against each other through the second positioning member 4 arranged between the first positioning surface and the second matching surface.
The arrangement is that after the first connecting piece 1 and the second connecting piece 2 are assembled and connected, the first positioning surface 12 and the first matching surface 21 on the first connecting piece 1 and the second connecting piece 2 are directly or indirectly abutted, and the second positioning surface 13 and the second matching surface 22 are also directly or indirectly abutted, so that double-sided positioning of the first connecting piece 1 and the second connecting piece 2 is realized, when the connecting shaft 11 of the first connecting piece 1 is assembled into the insertion groove 20 through threads, stress borne by the first connecting piece 1 can be more uniformly shared on the whole connecting shaft 11 and the shaft body 10, the level of thread stress in the structure is effectively reduced, and furthermore, when the thread stress is reduced, the pre-tightening force borne by the first connecting piece 1 when the first connecting piece 1 is assembled into the second connecting piece 2 is remarkably improved. Finally, the effect of effectively reducing and dispersing the stress of the upper threads of the first connecting piece 1 while improving the assembling pretightening force is achieved, so that the performance of preventing the threads from loosening and breaking is improved, and the service life of the integral connecting structure is prolonged.
Referring to fig. 3, in some embodiments, the length of the connecting shaft 11 is greater than the depth of the inserting groove 20, the first positioning surface 12 and the first mating surface 21 indirectly abut against each other through the first positioning member 3, and the second positioning surface 13 and the second mating surface 22 directly abut against each other.
For the first connecting piece 1 with the length of the connecting shaft 11 being greater than the depth of the inserting groove 20, the part of the connecting shaft 11 is still outside the inserting groove 20 after the second positioning surface 13 at the end of the connecting shaft 11 is attached to the second matching surface 22 at the bottom of the inserting groove 20, so that a gap is formed between the first positioning surface 12 and the first matching surface 21, at this time, the first positioning piece 3 is a positioning sleeve sleeved on the periphery of the connecting shaft 11, and the two sides of the first positioning piece are completely attached to and abutted against the first positioning surface 12 and the first matching surface 21 respectively, so that the first positioning surface 12 and the first matching surface 21 are indirectly abutted against each other when the first connecting piece 1 and the second connecting piece 2 are assembled, and further, stress can be effectively transferred and dispersed.
Referring to fig. 4, in other embodiments, the length of the connecting shaft 11 is smaller than the depth of the inserting groove 20, the first positioning surface 12 directly abuts against the second mating surface 22, and the second positioning surface 13 indirectly abuts against the second mating surface 22 through the second positioning element 4.
For the first connecting piece 1 with the length of the connecting shaft 11 smaller than the depth of the inserting groove 20, the first positioning surface 12 of the shaft body 10 and the first matching surface 21 outside the inserting groove 20 can be directly attached after the connecting shaft 11 is assembled into the inserting groove 20, a gap is formed between the second positioning surface 13 at the end of the connecting shaft 11 and the second matching surface 22 at the bottom of the inserting groove 20, at this time, the second positioning piece 4 is a positioning pad arranged in the gap, and two sides of the positioning pad are respectively attached to the second positioning surface 13 and the second matching surface 22 and are tightly abutted, so that when the first connecting piece 1 and the second connecting piece 2 are assembled, the second positioning surface 13 and the second matching surface 22 are indirectly abutted, and further, stress can be effectively transferred and dispersed.
Optionally, an observation hole 23 communicating with the outside of the second connector 2 is formed on the circumferential inner wall of the bottom of the insertion groove 20, so that when a gap exists between the second positioning surface 13 and the second mating surface 22, observation or measurement is performed through the observation hole 23.
By means of the arrangement, whether the second positioning surface 13 and the second matching surface 22 are directly or indirectly abutted can be smoothly observed through the observation hole 23, and the size of the gap can be measured when the gap exists.
Referring to fig. 5, optionally, the connecting shaft 11 includes:
a connection section 110 connected to the shaft body 10;
the threaded section 111 is arranged on one side, away from the shaft body 10, of the connecting section 110, and the external thread is arranged on the circumferential outer wall of the connecting section;
and the transition section 112 is connected with the connecting section 110 and the threaded section 111, and the circumferential outer wall of the transition section is arranged in a concave curved surface.
Referring to fig. 6, further, a stress reducing bevel 1110 is wound around the end of the threaded section 111 near the transition section 112, and the stress reducing bevel 1110 gradually decreases in diameter in a direction near the transition section 112.
Because the external screw thread on the screw thread section 111 is when extending to the terminal of screw thread section 111 and finishing extending, the tip of external screw thread will form independent and sharp-pointed most advanced column structure for the stress that the tip of external screw thread received when carrying out the screw thread assembly is comparatively concentrated, easily causes the tip of external screw thread broken in the pretightning force is great or long-term use, and then influences the connection stability of both. And through the stress reducing inclined plane 1110, the end part peripheral edge of the thread section 111 forms an inclined plane structure with gradually reduced diameter, so that the stress between the upper external thread end part structure and the internal thread can be effectively reduced when the upper external thread end part structure is assembled and connected, and the crushing caused by overlarge stress concentration is avoided.
In a second aspect, embodiments of the present application provide a method for assembling a double-positioning thread.
A method of assembling a double-locating thread comprising the steps of:
s100, judging whether the length of the connecting shaft 11 of the first connecting piece 1 is larger than the depth of the inserting groove 20 of the second connecting piece 2;
s210, if the depth of the connecting shaft is larger than the depth of the inserting groove 20, sleeving a measuring pad 5 outside the connecting shaft 11, and carrying out threaded assembly on the first connecting piece 1 and the second connecting piece 2 according to a first preset torque requirement, so that two sides of the first positioning piece 3 are completely attached to the first positioning surface 12 and the first matching surface 21, and an adjusting gap 6 is formed between the second positioning surface 13 and the second matching surface 22 (see fig. 7);
s211, measuring the distance between the adjusting gaps 6, calculating by combining the thickness of the measuring pad 5 to obtain the thickness of the positioning piece, and processing according to the thickness of the positioning piece to obtain a first positioning piece 3;
s212, sleeving the obtained first positioning member 3 outside the connecting shaft 11, and performing threaded assembly on the first connecting member 1 and the second connecting member 2 according to a second preset torque requirement, so that two sides of the first positioning member 3 are completely attached to the first positioning surface 12 and the first fitting surface 21, and the second positioning surface 13 is completely attached to the second fitting surface 22;
s220, if the depth is smaller than the depth of the inserting groove 20, performing threaded assembly on the first connecting piece 1 and the second connecting piece 2 according to a third preset torque requirement, so that the first positioning surface 12 is attached to the first matching surface 21, and an adjusting gap 6 is formed between the second positioning surface 13 and the second matching surface 22 (see fig. 8);
s221, measuring the adjusting gap 6, calculating to obtain the thickness of the second positioning piece 4, and processing to obtain the second positioning piece 4 according to the calculated thickness of the positioning piece;
s222, placing the obtained second positioning piece 4 between the second positioning surface 13 and the second matching surface 22, and carrying out threaded assembly on the first connecting piece 1 and the second connecting piece 2 according to a fourth preset torque requirement, so that the first positioning surface 12 is completely attached to the first matching surface 21, and two sides of the second positioning piece 4 are completely attached to the second positioning surface 13 and the second matching surface 22.
Referring to fig. 7, when the length of the connecting shaft 11 is greater than the depth of the inserting groove 20, the double-positioning thread assembly is performed in steps S210 to S212, in the process, the measuring pad 5 is sleeved outside the connecting shaft 11, and the first positioning surfaces 12 and the first matching surfaces 21 on the two sides of the measuring pad 5 are attached and abutted, so that an adjustment gap 6 is generated between the second positioning surface 13 and the second matching surface 22, the thickness of the first positioning piece 3 can be calculated by measuring the distance between the adjustment gaps 6, and the double-positioning thread assembly of the first connecting piece 1 and the second connecting piece 2 can be performed after the first positioning piece 3 is manufactured.
Referring to fig. 8, when the length of the connecting shaft 11 is smaller than the depth of the inserting groove 20, the double-positioning threaded assembly is performed in steps S220 to S222, in the process, the first positioning surface 12 is directly attached and abutted to the first matching surface 21, the adjusting gap 6 is generated between the second positioning surface 13 and the second matching surface 22, after the distance between the adjusting gap 6 is measured, the thickness of the second positioning member 4 can be obtained through calculation, and the double-positioning threaded assembly of the first connecting member 1 and the second connecting member 2 can be performed after the second positioning member 4 is manufactured.
In the above steps S210, S212, S220, and S22, the first preset torque requirement, the second preset torque requirement, the third preset torque requirement, and the fourth preset torque requirement are all obtained by finite element analysis tests of the first connecting member 1 and the second connecting member 2.
Optionally, the distance between the adjusting gaps 6 is measured, the thickness of the first positioning member 3 is calculated by combining the thickness of the measuring pad 5, and the thickness of the first positioning member 3 in the first positioning member 3 is processed according to the thickness of the first positioning member 3, where the thickness of the first positioning member 3 is equal to the thickness of the measuring pad 5, the distance between the adjusting gaps 6, and a first set error;
the adjustment gap 6 is measured, the thickness of the second positioning element 4 is calculated, and the thickness of the second positioning element 4 in the second positioning element 4 is obtained by machining according to the calculated thickness of the second positioning element 4, which is the distance between the adjustment gaps 6 and the second set error.
The first setting error and the second setting error are correspondingly given by a technician according to the deformation quantity of the first connecting piece 1, the second connecting piece 2, the first positioning piece 3 or the second positioning piece 4 which can be generated during assembly.
By means of the arrangement, the specific thickness requirements of the first positioning piece 3 and the second positioning piece 4 can be quickly obtained, and the first positioning piece 3 or the second positioning piece 4 can form sufficient pre-tightening force and good stress transmission dispersion effect when being connected and abutted with the first connecting piece 1 and the second connecting piece through the first setting error and the second setting error.
Optionally, the distance between the adjusting gaps 6 is measured, the thickness of the first positioning part 3 is calculated by combining the thickness of the measuring pad 5, the first positioning part 3 is processed according to the thickness of the first positioning part 3, the adjusting gaps 6 are measured, the thickness of the second positioning part 4 is calculated, the second positioning part 4 is processed according to the thickness of the second positioning part 4, and the distance between the adjusting gaps 6 is measured through the observation hole channel 23 which is communicated with the bottom area of the inserting groove 20 and the outer space of the second connecting part 2.
Referring to fig. 7 and 8, in the present embodiment, the axial direction of the observation hole 23 is perpendicular to the axial direction of the insertion groove 20, so that an operator can directly observe the adjustment gap 6 at the bottom of the insertion groove 20 along a straight light path. It should be noted that the opening position and the diameter length of the observation hole channel 23 on the second connecting member 2 are satisfied, and the two side edges in the depth direction of the inserting groove 20 are respectively located at two sides of the second positioning surface 13 and the second matching surface 22, that is, the diameter length of the observation hole channel 23 is at least greater than the distance between the second positioning surface 13 and the second matching surface 22 and the adjustment gap 6 is adjusted, so that the two sides can be distributed outside the second positioning surface 13 and the second matching surface 22 to completely expose the adjustment gap 6, and an operator can accurately measure the distance between the adjustment gap 6 through a feeler gauge.
In addition, in other embodiments, referring to fig. 9, when the diameter of the observation hole channel 23 is smaller than the distance between the second positioning surface 13 and the second matching surface 22, that is, the observation hole channel 23 cannot completely expose the adjustment gap 6, before the original steps S211 and S221, an additional pad 7 needs to be additionally arranged between the second positioning surface 13 and the second matching surface 22, that is, a part of the adjustment gap 6 can be occupied by the additional pad 7, and the remaining part of the adjustment gap 6 can be completely exposed through the observation hole channel 23, and further, in steps S211 and S221, an operator can obtain the distance of the adjustment gap 6 by measuring the distance of the remaining adjustment gap 6 and combining the thickness of the additional pad 7, so as to further calculate the thickness of the first positioning element 3 or the second positioning element 4.
In other embodiments, step S210 may be replaced with: if the depth of the first positioning surface is larger than the depth of the inserting groove 20, the first connecting piece 1 and the second connecting piece 2 are in threaded assembly according to a fifth preset torque requirement, so that the second positioning surface 13 is attached to and abutted against the second matching surface 22, and an adjusting gap 6 is formed between the first positioning surface 12 and the first matching surface 21 (see fig. 10).
In this embodiment, the thickness of the first positioning element 3 is determined by subtracting the first setting error from the measured distance of the adjustment gap 6.
However, in this scheme, because other elements are often arranged outside the shaft body 10 of the first connecting member 1 in the actual use process, if the arranged other elements block the adjustment gap 6 between the first positioning surface 12 and the first matching surface 21, or the structure extension distance is long, so that an operator cannot directly approach the first positioning surface 12 and the first matching surface 21, the operator cannot or cannot measure the distance between the adjustment gap 6, the accuracy of the measurement result is also difficult to be ensured in this case, and a large error may occur, so that the subsequent first positioning member 3 cannot be accurately processed, and the assembly effect of the first connecting member 1 and the second connecting member 2 is affected.
Therefore, in step S210 of this embodiment, the measuring pad 5 is adopted, so that the adjusting gap 6 is located between the second positioning surface 13 and the second fitting surface 22, and the size of the distance between the adjusting gap 6 is measured by observing the duct 23 and the feeler gauge in the subsequent steps, thereby ensuring that the adjusting gap 6 can be measured stably and accurately, and further effectively ensuring the accuracy of the calculation result of the first positioning member 3.
Optionally, the distance between the adjusting gaps 6 is measured, the thickness of the first positioning member 3 is calculated by combining the thickness of the measuring pad 5, and the first positioning member 3 is machined according to the thickness of the first positioning member 3, where the first positioning member 3 is the shortened measuring pad 5.
Set up like this, make 3 accessible measuring pads 5 turning of first locating piece or polish and obtain, reduce the processing degree of difficulty of 3 first locating pieces under this step, improve the operating efficiency of the double-positioning screw assembly method that this application provided.
According to the double-positioning thread assembling structure and method provided by the embodiment of the application, double-positioning-surface assembling connection of the first connecting piece 1 and the second connecting piece 2 is achieved under the condition that the pre-tightening force is 9.6KN.m, single-positioning-surface assembling connection of the first connecting piece 1 and the second connecting piece 2 which are made of the same material and have the same length is achieved under the condition of the same pre-tightening force, stress analysis tests are conducted on the first connecting piece 1 and the second connecting piece 2, and the test results are shown in fig. 11 and 12.
The maximum stress on the first connecting piece 1 and the second connecting piece 2 under the double-positioning-surface assembling connection is 958.42Mpa, the maximum stress on the first connecting piece 1 and the second connecting piece 2 under the single-positioning-surface assembling connection is 1537.01Mpa, and the stress on the first connecting piece 1 and the second connecting piece 2 under the double-positioning-surface assembling condition is more uniform.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A double-positioning threaded assembling structure is characterized by comprising:
the first connecting piece (1) comprises a shaft body (10) and a connecting shaft (11) connected to the end part of the shaft body (10), a first positioning surface (12) is formed between the end surface peripheral edge of the shaft body (10) and the end surface peripheral edge of the connecting shaft (11) on the inner side of the shaft body, external threads are arranged on the outer wall of the peripheral side of the connecting shaft (11), and a second positioning surface (13) is formed on the end surface, far away from the shaft body (10), of the connecting shaft (11);
the second connecting piece (2) is provided with an inserting groove (20), the outer wall of the second connecting piece (2) on the periphery of the inserting groove (20) is provided with a first matching surface (21), an internal thread corresponding to the external thread is arranged in the inserting groove (20), and the bottom surface of the inserting groove (20) forms a second matching surface (22);
the first positioning surface (12) and the first matching surface (21) are indirectly abutted through a first positioning piece (3) arranged between the first positioning surface and the first matching surface in a cushioning manner, the second positioning surface (13) and the second matching surface (22) are directly abutted, or,
the first positioning surface (12) and the first matching surface (21) are directly abutted, and the second positioning surface (13) and the second matching surface (22) are indirectly abutted through a second positioning piece (4) arranged between the first positioning surface and the second matching surface through a pad.
2. The double-positioning threaded assembly structure according to claim 1, wherein the length of the connecting shaft (11) is greater than the depth of the insertion groove (20), the first positioning surface (12) and the first mating surface (21) indirectly abut through the first positioning member (3), and the second positioning surface (13) and the second mating surface (22) directly abut.
3. The double-positioning threaded assembly structure according to claim 1, wherein the length of the connecting shaft (11) is smaller than the depth of the insertion groove (20), the first positioning surface (12) directly abuts against the second mating surface (22), and the second positioning surface (13) indirectly abuts against the second mating surface (22) through the second positioning member (4).
4. The double-positioning threaded assembling structure according to claim 1, wherein an observation hole (23) communicating to the outside of the second connecting member (2) is opened on a circumferential inner wall of the bottom of the insertion groove (20) so as to observe or measure through the observation hole (23) when there is a gap between the second positioning surface (13) and the second mating surface (22).
5. Double-positioning threaded fitting structure according to claim 1, characterized in that said connection shaft (11) comprises:
a connecting section (110) connected to the shaft body (10);
the threaded section (111) is arranged on one side, away from the shaft body (10), of the connecting section (110), and the external thread is arranged on the circumferential outer wall of the connecting section;
the transition section (112) is connected with the connecting section (110) and the thread section (111), and the circumferential outer wall of the transition section is arranged in an inwards concave curved surface.
6. The double-positioning threaded fitting structure of claim 5, characterized in that the end of the threaded section (111) close to the transition section (112) is circumferentially provided with a stress-reducing chamfer (1110), the stress-reducing chamfer (1110) decreasing in diameter in the direction close to the transition section (112).
7. A double-positioning thread assembling method is characterized by comprising the following steps:
judging whether the length of the connecting shaft (11) of the first connecting piece (1) is greater than the depth of the inserting groove (20) of the second connecting piece (2);
if the depth of the measuring pad is larger than the depth of the inserting groove (20), a measuring pad (5) is sleeved outside the connecting shaft (11), the first connecting piece (1) and the second connecting piece (2) are assembled in a threaded mode according to a first preset torque requirement, two sides of the first positioning piece (3) are completely attached to the first positioning surface (12) and the first matching surface (21), and an adjusting gap (6) is formed between the second positioning surface (13) and the second matching surface (22);
measuring the distance of the adjusting gap (6), calculating the thickness of the positioning piece by combining the thickness of the measuring pad (5), and processing the positioning piece according to the thickness of the positioning piece to obtain a first positioning piece (3);
sleeving the obtained first positioning piece (3) outside the connecting shaft (11), and carrying out threaded assembly on the first connecting piece (1) and the second connecting piece (2) according to a second preset torque requirement, so that two sides of the first positioning piece (3) are completely attached to the first positioning surface (12) and the first matching surface (21), and the second positioning surface (13) is completely attached to the second matching surface (22);
if the depth of the first positioning surface is smaller than that of the inserting groove (20), the first connecting piece (1) and the second connecting piece (2) are subjected to threaded assembly according to a third preset torque requirement, so that the first positioning surface (12) is attached to the first matching surface (21), and an adjusting gap (6) is formed between the second positioning surface (13) and the second matching surface (22);
measuring the adjusting clearance (6), calculating to obtain the thickness of the second positioning piece (4), and processing to obtain the second positioning piece (4) according to the calculated thickness of the positioning piece;
placing the obtained second positioning piece (4) between the second positioning surface (13) and the second matching surface (22), and carrying out threaded assembly on the first connecting piece (1) and the second connecting piece (2) according to a fourth preset torque requirement to enable the first positioning surface (12) and the first matching surface (21) to be completely attached, and completely attaching the two sides of the second positioning piece (4) to the second positioning surface (13) and the second matching surface (22).
8. The double-positioning thread makeup method according to claim 7,
the distance between the adjusting gaps (6) is measured, the thickness of the first positioning piece (3) is obtained through calculation by combining the thickness of the measuring pad (5), and the thickness of the first positioning piece (3) is processed according to the thickness of the first positioning piece (3), wherein the thickness of the first positioning piece (3) is equal to the thickness of the measuring pad (5), the distance between the adjusting gaps (6) and a first set error;
and measuring the adjusting gap (6), calculating to obtain the thickness of the second positioning piece (4), and processing to obtain the distance between the second positioning piece (4) and the adjusting gap (6) -a second set error in the second positioning piece (4) according to the calculated thickness of the second positioning piece (4).
9. The double-positioning thread assembly method according to claim 7, wherein the distance between the adjustment gaps (6) is measured, the thickness of the first positioning member (3) is calculated by combining the thickness of the measurement pad (5), the thickness of the second positioning member (4) is calculated by processing the adjustment gaps (6) into the first positioning member (3), the thickness of the second positioning member (4) is calculated by processing the thickness of the second positioning member (4) into the second positioning member (4), and the distance between the adjustment gaps (6) is measured by an observation hole (23) communicating the bottom area of the insertion groove (20) with the outer space of the second connecting member (2).
10. The double-positioning thread assembly method according to claim 7, wherein the distance between the adjusting gaps (6) is measured, the thickness of the first positioning piece (3) is calculated by combining the thickness of the measuring pad (5), and the first positioning piece (3) is machined according to the thickness of the first positioning piece (3), wherein the first positioning piece (3) is the shortened measuring pad (5).
CN202210467765.0A 2022-04-24 2022-04-24 Double-positioning thread assembly structure and method Pending CN114857156A (en)

Priority Applications (1)

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CN202210467765.0A CN114857156A (en) 2022-04-24 2022-04-24 Double-positioning thread assembly structure and method

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Application Number Priority Date Filing Date Title
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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184769A (en) * 1960-05-13 1965-05-25 Victor H Barwood Method of assembling sealing washer and headed fastener
US3791463A (en) * 1972-11-03 1974-02-12 Smith Williston Inc Drill head assembly
JPS61145110U (en) * 1985-02-28 1986-09-08
WO2000077409A1 (en) * 1997-12-17 2000-12-21 Kawasaki Jukogyo Kabushiki Kaisha Tightening bolt
US20090136316A1 (en) * 2006-08-04 2009-05-28 Leica Camera Ag Cylinder rings
JP2014119050A (en) * 2012-12-18 2014-06-30 Daiwa House Industry Co Ltd Loading rack fixing jig and loading rack
JP2016169807A (en) * 2015-03-13 2016-09-23 みやび建設株式会社 Fastening tool
US20180274395A1 (en) * 2015-02-11 2018-09-27 R. Bradford Fawley Valve Clearance Setting and Adjustment Systems and Related Methods
CN111594536A (en) * 2020-06-27 2020-08-28 罗章平 Self-locking nut assembly
CN112160962A (en) * 2020-09-25 2021-01-01 邹吉武 Self-locking bolt assembly

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184769A (en) * 1960-05-13 1965-05-25 Victor H Barwood Method of assembling sealing washer and headed fastener
US3791463A (en) * 1972-11-03 1974-02-12 Smith Williston Inc Drill head assembly
JPS61145110U (en) * 1985-02-28 1986-09-08
WO2000077409A1 (en) * 1997-12-17 2000-12-21 Kawasaki Jukogyo Kabushiki Kaisha Tightening bolt
US20090136316A1 (en) * 2006-08-04 2009-05-28 Leica Camera Ag Cylinder rings
JP2014119050A (en) * 2012-12-18 2014-06-30 Daiwa House Industry Co Ltd Loading rack fixing jig and loading rack
US20180274395A1 (en) * 2015-02-11 2018-09-27 R. Bradford Fawley Valve Clearance Setting and Adjustment Systems and Related Methods
JP2016169807A (en) * 2015-03-13 2016-09-23 みやび建設株式会社 Fastening tool
CN111594536A (en) * 2020-06-27 2020-08-28 罗章平 Self-locking nut assembly
CN112160962A (en) * 2020-09-25 2021-01-01 邹吉武 Self-locking bolt assembly

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