CN110005683A - A kind of self-locking nut and its manufacture and installation method - Google Patents
A kind of self-locking nut and its manufacture and installation method Download PDFInfo
- Publication number
- CN110005683A CN110005683A CN201910286841.6A CN201910286841A CN110005683A CN 110005683 A CN110005683 A CN 110005683A CN 201910286841 A CN201910286841 A CN 201910286841A CN 110005683 A CN110005683 A CN 110005683A
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- locking nut
- silk
- nut
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- 238000009434 installation Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims description 27
- 210000002445 nipple Anatomy 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/143—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same for installing wire thread inserts or tubular threaded inserts
-
- 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
- F16B37/00—Nuts or like thread-engaging members
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forging (AREA)
Abstract
The present invention relates to a kind of self-locking nuts, hollow cylinder including both ends open, the hollow cylinder is divided into poling section, deformation section and silk from head end to tail end and connects section, the deformation section is identical with the internal diameter of poling section, and the deformation section and the internal diameter of the poling section are greater than the internal diameter that the silk connects section, the mechanical strength of the deformation section is less than the poling section and the silk connects the mechanical strength of section, and the inner hole hole wall that the silk connects section is equipped with internal screw thread；The invention further relates to a kind of manufacturing method of above-mentioned self-locking nut, step 1 provides a kind of nut blank；Step 2 carries out Spot annealing treatment to nut blank；The intensity in deformation of products region can be changed under the premise of guaranteeing that resultant metal streamline is completed, realize the softening to product part, the integral strength of product will not be impacted, improve the reliability of product；The invention further relates to a kind of installation methods of self-locking nut, and directly self-locking nut can be mounted on matrix using installation tool.
Description
Technical field
The present invention relates to a kind of self-locking nut and its manufacture and installation methods.
Background technique
The product for having rivet, self-locking nut etc. to need local deformation at present in actual use, needs regional area
Intensity be lower than remaining region, realize the riveting molding of product.At present frequently with means be method using turnery processing, will
The wall thickness in the region for needing to deform reduces to achieve the purpose that Reducing distortion field strength.
For example, existing self-locking nut, as shown in Figure 1, including the hollow cylinder of both ends open and being set to described hollow
The hollow cone platform forming head portion 1-1 of cylindrical body head end, the hollow cylinder include poling section 1-2, deform from head end to tail end
Section 1-3 and silk meet a section 1-5, and the internal diameter of the deformation section 1-3 is greater than perforated section 1-2 and silk connects the internal diameter of section 1-5, the deformation section
1-3 and the silk connect and are additionally provided with changeover portion 1-4 between section 1-5, and the changeover portion 1-4 is consistent with the internal diameter of the perforated section 1-2,
The internal diameter of the changeover portion 1-4 is greater than the internal diameter that the silk meets section 1-5, the inner hole of the deformation section 1-3 and the perforated section 1-2
Inner hole joining place chamfering, the inner hole joining place of the inner hole of the deformation section 1-3 and the changeover portion 1-4 also is provided with chamfering.
The inner hole of deformation section 1-3 is through subsequent turning machine-shaping, and when turnery processing can destroy the metal stream of nut itself
Line affects to the performance of nut, and is wedge angle at the chamfering at deformation section 1-3 inner hole both ends, is easy to produce
Stress is concentrated, and is easily cracked or is destroyed from sharp corner after riveting forming, causes a hidden trouble to the safety of product, reliability；
It simultaneously as the size of self-locking nut itself is smaller, and is thin-wall part, turnery processing difficulty is larger, and processing efficiency is lower and knife
Tool abrasion is very fast, and production cost is higher.
Summary of the invention
The present invention in view of the deficiency of the prior art, provides a kind of self-locking nut of high reliablity.
The technical scheme to solve the above technical problems is that a kind of self-locking nut, including the hollow of both ends open
Cylindrical body, the hollow cylinder are divided into poling section, deformation section and silk from head end to tail end and connect section, the deformation section and wear
The internal diameter of pipeline section is identical, and the deformation section and the internal diameter of the poling section are greater than the internal diameter that the silk connects section, the deformation section
Mechanical strength be less than the poling section and the silk and connect the mechanical strength of section, and formed after the annealed processing of the deformation section；
The inner hole hole wall that the silk connects section is equipped with internal screw thread.
The beneficial effect of self-locking nut is: making annealing treatment to deformation section, reduces its intensity, do not need to add by machine
Work carries out reduction processing, and the stress that can reduce nut is concentrated, and the cracking situation of deformation section in use process is reduced, and improves nut
Reliability.
Further, the mechanical strength of the deformation section is gradually reduced from both ends to centre.
Beneficial effect using above-mentioned further technical solution is: in nut in use, the middle part of deformation section is most easily-deformable,
Riveting forming force can be substantially reduced, riveting molding is uniform, and deformation section is avoided to crack, can greatly improve nut reliability and
Safety.
It further, further include set on the hollow cone platform forming head portion of the hollow cylinder head end, the hollow cone platform
The inner hole in forming head portion is consistent with the inner hole of the poling section.
The invention further relates to a kind of manufacturing methods of self-locking nut, comprising the following steps:
Step 1 provides a kind of nut blank, and the self-locking nut blank includes the hollow cylinder of both ends open, described
Hollow cylinder is divided into light pipe segment from head end to tail end and silk connects section, and the internal diameter of the light pipe segment is greater than the silk and connects section
Internal diameter, the internal chamber wall that the silk connects section are equipped with internal screw thread；
Step 2, the carry out Spot annealing treatment to nut blank.
Further, the procedure of processing of nut blank is as follows in step 1:
Step 1.1, upsetting shaping solid nut blank；Cylinder blank is selected, upsetting system is carried out to it, in cylinder blank
The preforming nipple heads in one end, form solid nut blank；
Step 1.2, machining hollow nut blank；Center stepped hole is formed by turnery processing, and to preforming
Nipple heads are processed, and are formed the nipple heads that outer profile is truncated cone, are so far obtained hollow nut blank；
Self-locking nut blank described in step 1.3, tapping and forming；Section is connect to the silk of nut and carries out tapping, forms internal screw thread.
Further, in step 2, light pipe segment is heated close to the side that silk connects section using annealing tooling, shape after annealing
At the deformation section.
Further, the annealing tooling includes positioning tool, heating coil and heating generator, and the positioning tool is used for
The hollow cone platform forming head portion of the fixed self-locking nut, two connecting terminals of the heating coil are connected to the height
On frequency heater.
Further, the heating generator and the heating coil are respectively adopted heating generator in the prior art and add
Heat coil, wherein the length of heating coil and the width of annealing region are adapted.
Further, the positioning tool includes workbench and the positioning convex platform on the workbench, the convex
Platform is adapted with the inner hole in the hollow cone platform forming head portion.
Further, in step 2, when annealing, the electric current of heating generator is set between 27~32A, on heating generator
Displays temperature control between 400~430 DEG C, the annealing time of each nut blank controls between 0.5~1.5s.
Further, further include the steps that the step of closing up to nut blank, closing up to nut blank is located at step
After rapid 1.3, the outer end for connecing section to silk is closed up, and is formed ellipse and is closed up.
Further, further include the steps that hardness determination, the hardness of annealing region is detected, guarantee the hard of annealing region
Degree is lower than the hardness in non-annealing region.
The beneficial effect of manufacturing method is: can change deformation of products under the premise of guaranteeing that resultant metal streamline is completed
The intensity in region is realized the softening to product part, will not be impacted to the integral strength of product, to realize the riveting of product
It is connected into shape, improves the reliability of product.
The invention further relates to a kind of installation methods of self-locking nut, include the following steps:
Step a, self-locking nut is mounted in installation tool: installation tool includes fixed plate and screw rod, therefrom by screw rod
The inner hole on empty truncated cone head penetrates, and is screwed into silk and connects section；
Step b, self-locking nut is inserted into the mounting hole in installation base body by installation tool；
Step c, the fixed plate of installation tool holds out against the end face in hollow cone platform forming head portion, pulls down screw rod, drives self-locking
The deformation section of nut deforms, and after the completion of deformation, installation tool is unloaded.
The beneficial effect of installation method is: directly self-locking nut can be mounted on matrix using installation tool, it is subsequent
It needs when installing other components on matrix, can directly be installed using the screw or bolt that match with self-locking nut,
It is easy to use.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of self-locking nut in the prior art；
Fig. 2 is the structural schematic diagram of self-locking nut in the present invention；
Fig. 3 is the structural schematic diagram of annealing tooling in the present invention；
Fig. 4 is the distribution schematic diagram of deformation section mechanical strength in the present invention；
Status diagram when Fig. 5 is self-locking nut installation in the present invention；
Fig. 6 is status diagram when self-locking nut is installed in the present invention；
In the accompanying drawings, list of designations represented by each label is as follows: 1, nut, 1-1, hollow cone platform forming head portion,
1-2, poling section, 1-3, deformation section, 1-4, changeover portion, 1-5, silk meet section, 2, positioning tool, 2-1, workbench, 2-2, convex
Platform, 3, heating coil, 4, heating generator, 5, installation tool, 5-1, fixed plate, 5-2, screw rod, 6, installation base body.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Fig. 2, a kind of self-locking nut, the hollow cylinder including both ends open, the hollow cylinder is from head end
Poling section 1-2, deformation section 1-3 and silk, which are divided into, to tail end connects a section 1-5, the internal diameter phase of the deformation section 1-3 and poling section 1-2
Together, and the internal diameter of the deformation section 1-3 and the poling section 1-2 are greater than the internal diameter that the silk meets section 1-5, the deformation section 1-3
Mechanical strength be less than the mechanical strength that the poling section 1-2 and the silk meet section 1-5, the annealed processing of deformation section 1-3
After form；The inner hole hole wall that the silk meets section 1-5 is equipped with internal screw thread.
The mechanical strength of the deformation section 1-3 is gradually reduced from both ends to centre.
It further include the hollow cone platform forming head portion 1-1 set on the hollow cylinder head end, the hollow cone platform forming head
The inner hole of portion 1-1 is consistent with the inner hole of the poling section 1-2.
The invention further relates to a kind of manufacturing methods of self-locking nut, comprising the following steps:
Step 1 provides a kind of nut blank, and the self-locking nut blank includes the hollow cylinder of both ends open, described
Hollow cylinder is divided into light pipe segment from head end to tail end and silk meets a section 1-5, and the internal diameter of the light pipe segment is greater than the silk and connects
The internal diameter of section 1-5, the internal chamber wall that the silk meets section 1-5 are equipped with internal screw thread；The specific procedure of processing of nut blank is as follows:
Step 1.1, upsetting shaping solid nut blank；Cylinder blank is selected, upsetting system is carried out to it, in cylinder blank
The preforming nipple heads in one end, form solid nut blank；
Step 1.2, machining hollow nut blank；Center stepped hole is formed by turnery processing, and to preforming
Nipple heads are processed, and are formed the nipple heads that outer profile is truncated cone, are so far obtained hollow nut blank；
Wherein, the center stepped hole includes the large diameter hole and diameter holes, and the large diameter hole is the interior of the light pipe segment
Hole, the diameter holes are used for subsequent tapping, meet a section 1-5 to form the silk；
Step 1.3, tapping and forming nut blank；Section is connect to the silk of nut and carries out tapping, forms internal screw thread.
Step 1.4, the outer end that section is connect to silk are closed up, and are formed ellipse and are closed up, and the method for closing in uses the prior art
The closing method of middle nut；
Step 2, the carry out Spot annealing treatment to nut blank；Specifically: using annealing tooling to light pipe segment close to silk
The side for meeting section 1-5 is heated, and the deformation section 1-3 is formed after annealing, and the not annealed region of the light pipe segment forms institute
State poling section 1-2；
Tooling of annealing is as shown in figure 3, the annealing tooling includes positioning tool 2, heating coil 3 and heating generator 4, institute
Positioning tool 2 is stated for fixing the hollow cone platform forming head portion 1-1 of the self-locking nut 1, two wiring of the heating coil 3
Terminal is connected on the heating generator 4；
Heating generator and heater wire in the prior art is respectively adopted in the heating generator 4 and the heating coil 3
Circle, wherein the length of heating coil 3 and the width of light pipe segment annealing region are adapted；
The positioning tool 2 includes the workbench 2-1 and positioning convex platform 2-2 on the workbench 2-1, the positioning
Boss 2-2 is adapted with the inner hole (i.e. large diameter hole) of the hollow cone platform forming head portion 1-1；
When annealing, by 3 sets of heating coil on the nut blank having had good positioning, on heating coil 3 and nut blank
Region to be annealed is corresponding, and the electric current of heating generator 4 is set between 27~32A, the displays temperature on heating generator 4
Between 400~430 DEG C, the annealing time of each nut blank is controlled between 0.5~1.5s for control.
Step 3, hardness determination detect the hardness of annealing region, guarantee the hardness of annealing region lower than non-annealing
The hardness in region；Obtain after testing: the hardness in unannealed region is within the scope of 200HV~215HV；The hardness of annealing region is
Within the scope of 155HV~180HV；The hardness in the hardness of annealing region and unannealed region is there are apparent difference, and annealed zone
The hardness number in domain has apparent change of gradient, annealing region and deformation section, and the hardness of deformation section is gradually decreased from both ends to centre,
As shown in Figure 4.
As shown in Fig. 5-Fig. 6, the invention further relates to a kind of installation methods of self-locking nut, include the following steps:
Step a, self-locking nut 1 is mounted in installation tool 5: installation tool 5 includes fixed plate 5-1 and screw rod 5-2, will
Screw rod 5-2 is penetrated from the inner hole of hollow truncated cone head 1-1, and is screwed into silk and is connect in the threaded hole of section 1-5；
Step b, self-locking nut 1 is inserted into the mounting hole in installation base body 6 by installation tool 5；
Step c, the fixed plate 5-1 of installation tool 5 holds out against the end face of hollow cone platform forming head portion 1-1, pulls down screw rod 5-
1, the deformation section 1-3 deformation of self-locking nut 1 is driven, after the completion of deformation, screw rod is reversely twisted, installation tool 5 is unloaded.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of self-locking nut, which is characterized in that the hollow cylinder including both ends open, the hollow cylinder from head end to
Tail end is divided into poling section, deformation section and silk and connects section, and the deformation section is identical with the internal diameter of poling section, and the deformation section and
The internal diameter of the poling section is greater than the silk and connects the internal diameter of section, and the mechanical strength of the deformation section is less than the poling section and described
Silk connects the mechanical strength of section, and forms after the annealed processing of the deformation section；The inner hole hole wall that the silk connects section is equipped with interior spiral shell
Line.
2. self-locking nut according to claim 1, which is characterized in that the mechanical strength of the deformation section is from both ends to centre
It is gradually reduced.
3. self-locking nut according to claim 1, which is characterized in that further include being set in the hollow cylinder head end
The inner hole on empty truncated cone head, the hollow cone platform forming head portion is consistent with the inner hole of the poling section.
4. a kind of manufacturing method of self-locking nut, which comprises the following steps:
Step 1 provides a kind of nut blank, and the self-locking nut blank includes the hollow cylinder of both ends open, described hollow
Cylindrical body is divided into light pipe segment from head end to tail end and silk connects section, and the internal diameter of the light pipe segment is greater than the silk and connects the interior of section
Diameter, the internal chamber wall that the silk connects section are equipped with internal screw thread；
Step 2, the carry out Spot annealing treatment to nut blank.
5. the manufacturing method of self-locking nut according to claim 4, which is characterized in that the processing of nut blank in step 1
Steps are as follows:
Step 1.1, upsetting shaping solid nut blank；Cylinder blank is selected, upsetting system is carried out to it, the one of cylinder blank
Preforming nipple heads are held, solid nut blank is formed；
Step 1.2, machining hollow nut blank；Center stepped hole is formed by turnery processing, and to preforming nut
Head is processed, and is formed the nipple heads that outer profile is truncated cone, is so far obtained hollow nut blank；
Self-locking nut blank described in step 1.3, tapping and forming；Section is connect to the silk of nut and carries out tapping, forms internal screw thread.
6. the manufacturing method of self-locking nut according to claim 5, which is characterized in that in step 2, using annealing tooling pair
Light pipe segment is heated close to the side that silk connects section, and the deformation section is formed after annealing.
7. the manufacturing method of self-locking nut according to claim 6, which is characterized in that the annealing tooling includes positioning work
Dress, heating coil and heating generator, the positioning tool are used to fix the hollow cone platform forming head portion of the self-locking nut, institute
Two connecting terminals for stating heating coil are connected on the heating generator.
8. the manufacturing method of self-locking nut according to claim 5, which is characterized in that further include being received to nut blank
Mouthful the step of, the step of closing up to nut blank, is located at after step 1.3, and the outer end for connecing section to silk is closed up, and is formed
Ellipse closes up.
9. according to the manufacturing method of the described in any item self-locking nuts of claim 5-8, which is characterized in that further include hardness determination
The step of, the hardness of annealing region is detected, guarantees that the hardness of annealing region is lower than the hardness in non-annealing region.
10. a kind of installation method of self-locking nut, which comprises the steps of:
Step a, self-locking nut is mounted in installation tool: installation tool includes fixed plate and screw rod, by screw rod from hollow circle
The inner hole on taper type head penetrates, and is screwed into silk and connects section；
Step b, self-locking nut is inserted into the mounting hole in installation base body by installation tool；
Step c, the fixed plate of installation tool holds out against the end face in hollow cone platform forming head portion, pulls down screw rod, drives self-locking nut
Deformation section deformation, after the completion of deformation, installation tool is unloaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910286841.6A CN110005683A (en) | 2019-04-11 | 2019-04-11 | A kind of self-locking nut and its manufacture and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910286841.6A CN110005683A (en) | 2019-04-11 | 2019-04-11 | A kind of self-locking nut and its manufacture and installation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110005683A true CN110005683A (en) | 2019-07-12 |
Family
ID=67170976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910286841.6A Pending CN110005683A (en) | 2019-04-11 | 2019-04-11 | A kind of self-locking nut and its manufacture and installation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110005683A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464535A (en) * | 2021-05-26 | 2021-10-01 | 浙江坤厚汽车零部件股份有限公司 | Production process of high-strength rivet nut |
| CN113909574A (en) * | 2021-09-30 | 2022-01-11 | 中国航空工业标准件制造有限责任公司 | Groove machining method for earless supporting plate nut |
| CN116586923A (en) * | 2023-07-14 | 2023-08-15 | 成都迈特航空制造有限公司 | Manufacturing method of lightning protection nut assembly with gasket ring sleeve |
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| CN113464535A (en) * | 2021-05-26 | 2021-10-01 | 浙江坤厚汽车零部件股份有限公司 | Production process of high-strength rivet nut |
| CN113909574A (en) * | 2021-09-30 | 2022-01-11 | 中国航空工业标准件制造有限责任公司 | Groove machining method for earless supporting plate nut |
| CN116586923A (en) * | 2023-07-14 | 2023-08-15 | 成都迈特航空制造有限公司 | Manufacturing method of lightning protection nut assembly with gasket ring sleeve |
| CN116586923B (en) * | 2023-07-14 | 2023-10-24 | 成都迈特航空制造有限公司 | Manufacturing method of lightning protection nut assembly with gasket ring sleeve |
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Application publication date: 20190712 |