CN113798798A - Preparation method of high-temperature-resistant lock nut for commercial automobile - Google Patents
Preparation method of high-temperature-resistant lock nut for commercial automobile Download PDFInfo
- Publication number
- CN113798798A CN113798798A CN202111157852.8A CN202111157852A CN113798798A CN 113798798 A CN113798798 A CN 113798798A CN 202111157852 A CN202111157852 A CN 202111157852A CN 113798798 A CN113798798 A CN 113798798A
- Authority
- CN
- China
- Prior art keywords
- nut
- temperature
- processing
- closed
- threads
- Prior art date
- 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
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 20
- 238000007747 plating Methods 0.000 claims abstract description 13
- 229910052709 silver Inorganic materials 0.000 claims abstract description 13
- 239000004332 silver Substances 0.000 claims abstract description 13
- 238000005498 polishing Methods 0.000 claims abstract description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000013461 design Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Images
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a preparation method of a high-temperature-resistant lock nut for a commercial automobile, which comprises the following steps: upsetting the shape, polishing, processing a threaded bottom hole and threads by utilizing developed special equipment, locking and processing nuts and plating silver. The locking nut is screwed in and out for 15 times at normal temperature, meets the design requirement in high-temperature (650 ℃) vibration and high-temperature (650 ℃) axial load tests, and can be produced in batches.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a preparation method of a high-temperature-resistant lock nut for a commercial automobile.
Background
As the country carries out the national VI standard in the automobile industry, higher requirements are also put forward on the commercial automobile fasteners; in order to make the exhaust emission meet the requirements of the state VI; an exhaust gas treatment device is added between the engine and the exhaust emission, and the device will work at a temperature of 650 ℃. The clamp and the bolt and the locking nut used on the clamp selected by the tail gas treatment equipment need to work under a high-temperature environment. The locking nut in the prior art is screwed in and screwed out for 15 times at normal temperature to deform and thread, the locking nut does not meet the design requirement, the locking and thread deform after the tests such as high-temperature (650 ℃) vibration, high-temperature (650 ℃) axial load and the like, the design requirement cannot be met, the surface of a product discolors after the high temperature (650 ℃), and the nut selected by the existing equipment has no corresponding manufacturing process, so that the batch production of the locking nut can be realized.
Disclosure of Invention
The invention aims to overcome the defects and provides a preparation method of a high-temperature resistant lock nut for a commercial automobile, wherein the lock nut is screwed in and out for 15 times at normal temperature to meet the design requirements, and the high-temperature (650 ℃) vibration and high-temperature (650 ℃) axial load tests meet the design requirements, so that the high-temperature resistant lock nut can be produced in batch.
The purpose of the invention and the main technical problem of solving the invention are realized by adopting the following technical scheme:
the invention discloses a preparation method of a high-temperature-resistant lock nut for a commercial automobile, which comprises the following steps of:
(1) upsetting the shape: the external dimension of the nut is formed by one-time upsetting through designing and manufacturing a special forming die;
(2) polishing: polishing the shape of the nut;
(3) processing a threaded bottom hole: processing a threaded bottom hole by utilizing developed special equipment;
(4) processing threads: processing threads by utilizing developed special equipment;
(5) and (3) nut locking and processing: the two pressure heads are symmetrically arranged, the nut to be closed is placed in the closing cavity according to the size of the nut to be closed, the stress point of the pressure heads, which is in contact with a product, is an elliptical surface point, the pressure heads compress the nut, so that the surface of the closing part of the product is stressed when the nut is closed, and the outer wall of the closing structure of the nut is extruded by a profile tool, so that threads are deformed to a certain degree to generate assembly locking torque;
(6) silver plating: and (4) plating silver on the surface of the nut through a continuous silver plating production line.
Compared with the prior art, the invention has obvious advantages and beneficial effects. According to the technical scheme, the shape of the nut is formed by upsetting through the upsetting machine, the thread bottom hole and the thread are processed through developed special processing equipment, the locking function of the nut is realized through the necking-in machine, the surface of the nut meets the requirement of a high-temperature-resistant environment through an automatic silver plating production line, and the manufacturing of the locking nut comprises the steps of; part upsetting forming (shape) → polishing → processing thread bottom hole → tapping → closing in for locking → surface treatment (silver plating). The manufacturing process of the lock nut realizes the processing of the lock nut and can realize mass production. The strength is improved by cold deformation strengthening, and the strengthening is carried out without heat treatment. Silver plating is carried out through surface treatment so as to meet the final requirements of parts. In a word, the locking nut is screwed in and out for 15 times at normal temperature, meets the design requirement in high-temperature (650 ℃) vibration and high-temperature (650 ℃) axial load tests, and can be produced in batches.
Drawings
FIG. 1 is a schematic structural view of a nut of the present invention;
FIG. 2 is a left side view of the nut of the present invention;
fig. 3 is a flow chart of the nut processing of the present invention.
Detailed Description
The details of the embodiments, structures, features and functions according to the present invention are set forth in the accompanying drawings and the preferred embodiments.
Example one
The purpose of the invention and the main technical problem of solving the invention are realized by adopting the following technical scheme:
the invention discloses a preparation method of a high-temperature-resistant lock nut for a commercial automobile, which comprises the following steps of:
(1) upsetting the shape: the external dimension of the nut is formed by one-time upsetting through designing and manufacturing a special forming die;
(2) polishing: polishing the shape of the nut;
(3) processing a threaded bottom hole: processing a threaded bottom hole by using the existing equipment;
(4) processing threads: machining threads by using the existing equipment;
(5) and (3) nut locking and processing: the two pressure heads are symmetrically arranged, the nut to be closed is placed in the closing cavity according to the size of the nut to be closed, the stress point of the pressure heads, which is in contact with the product, is an elliptical surface point, the pressure heads compress the nut, so that the upper surface of the product is stressed when the nut is closed, and the outer wall of the closing structure of the nut is extruded through the profile tool, so that the threads are deformed to a certain degree to generate assembly locking torque;
(6) silver plating: and (4) plating silver on the surface of the nut through a continuous silver plating production line.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the present invention without departing from the technical spirit of the present invention.
Claims (1)
1. A preparation method of a high-temperature-resistant lock nut for a commercial automobile comprises the following steps:
(1) upsetting the shape: the external dimension of the nut is formed by one-time upsetting through designing and manufacturing a special forming die;
(2) polishing: polishing the shape of the nut;
(3) processing a threaded bottom hole: processing a threaded bottom hole by utilizing developed special equipment;
(4) processing threads: processing threads by utilizing developed special equipment;
(5) and (3) nut locking and processing: the two pressure heads are symmetrically arranged, the nut to be closed is placed in the closing cavity according to the size of the nut to be closed, the stress point of the pressure heads, which is in contact with a product, is an elliptical surface point, the pressure heads compress the nut, so that the surface of the closing part of the product is stressed when the nut is closed, and the outer wall of the closing structure of the nut is extruded by a profile tool, so that threads are deformed to a certain degree to generate assembly locking torque;
(6) silver plating: and (4) plating silver on the surface of the nut through a continuous silver plating production line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111157852.8A CN113798798A (en) | 2021-09-30 | 2021-09-30 | Preparation method of high-temperature-resistant lock nut for commercial automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111157852.8A CN113798798A (en) | 2021-09-30 | 2021-09-30 | Preparation method of high-temperature-resistant lock nut for commercial automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113798798A true CN113798798A (en) | 2021-12-17 |
Family
ID=78939182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111157852.8A Pending CN113798798A (en) | 2021-09-30 | 2021-09-30 | Preparation method of high-temperature-resistant lock nut for commercial automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113798798A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5201686A (en) * | 1990-08-27 | 1993-04-13 | Kunihiko Ozawa | Process and apparatus for producing a lock nut |
| KR20060113027A (en) * | 2005-04-29 | 2006-11-02 | 유수봉 | Clinching-nut's manufacturing method |
| CN102962376A (en) * | 2012-07-23 | 2013-03-13 | 贵州航天精工制造有限公司 | Opening-shrinking method for self-locking nut |
| CN206309737U (en) * | 2016-11-10 | 2017-07-07 | 沈阳航天三菱汽车发动机制造有限公司 | One kind installs exhaust manifold locking nut |
| CN107322236A (en) * | 2017-06-22 | 2017-11-07 | 贵州精立航太科技有限公司 | A kind of processing technology of high temperature supporting plate self-lock nut |
| CN111140585A (en) * | 2019-12-27 | 2020-05-12 | 成立航空技术有限公司 | High-temperature supporting plate self-locking nut and processing method thereof |
| CN111331322A (en) * | 2020-03-20 | 2020-06-26 | 海盐沛泓汽车零部件有限公司 | Production process of nylon lock nut |
-
2021
- 2021-09-30 CN CN202111157852.8A patent/CN113798798A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5201686A (en) * | 1990-08-27 | 1993-04-13 | Kunihiko Ozawa | Process and apparatus for producing a lock nut |
| KR20060113027A (en) * | 2005-04-29 | 2006-11-02 | 유수봉 | Clinching-nut's manufacturing method |
| CN102962376A (en) * | 2012-07-23 | 2013-03-13 | 贵州航天精工制造有限公司 | Opening-shrinking method for self-locking nut |
| CN206309737U (en) * | 2016-11-10 | 2017-07-07 | 沈阳航天三菱汽车发动机制造有限公司 | One kind installs exhaust manifold locking nut |
| CN107322236A (en) * | 2017-06-22 | 2017-11-07 | 贵州精立航太科技有限公司 | A kind of processing technology of high temperature supporting plate self-lock nut |
| CN111140585A (en) * | 2019-12-27 | 2020-05-12 | 成立航空技术有限公司 | High-temperature supporting plate self-locking nut and processing method thereof |
| CN111331322A (en) * | 2020-03-20 | 2020-06-26 | 海盐沛泓汽车零部件有限公司 | Production process of nylon lock nut |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102941448B (en) | A kind of aluminium alloy Closely locking nut processing technology | |
| CN101147951A (en) | Rolling preparation method for thick-walled and thin-bottomed basin parts | |
| CN102489978A (en) | Hot and cold composite precision forging forming method of great-modulus high-thickness straight-tooth cylindrical gear | |
| EP2638989A1 (en) | Process for manufacture of fastening component made from aluminum-based alloy, and fastening component made from aluminum-based alloy | |
| CN110253222A (en) | A kind of high temperature supporting plate self-lock nut processing technology | |
| CN200951456Y (en) | Mould for cold precision forging inner race and external race of automobile bearing | |
| CN103769825A (en) | Planet carrier for automobile and cold-forging forming process thereof | |
| CN103240359B (en) | Near-net forming method of high-strength internal hexagon bored bolt | |
| CN113798798A (en) | Preparation method of high-temperature-resistant lock nut for commercial automobile | |
| CN111069850A (en) | Method for processing stainless steel tensile high-locking nut | |
| Jung et al. | A study on the extrusion by a two-step process for manufacturing helical gear | |
| CN105215252A (en) | The forming technology of the mould of preform 45 ° of skew T jumping-up parts, method and 45 ° of skew Ts | |
| CN111167993B (en) | Forging and drawing forming method for aluminum alloy pipe fitting | |
| CN113210480A (en) | Method for eliminating residual stress of basin-shaped special-shaped forge piece | |
| CN111659846A (en) | Forging method for homogenizing GH141 special-shaped ring forging grains | |
| CN109570432B (en) | Aluminum alloy forged ring manufacturing method based on shearing die for punching | |
| CN108526381B (en) | Forging method of ultra-large aluminum-based composite ring piece | |
| Weiß et al. | Manufacture of face gearing–a new production method by means of determined material pre-distribution | |
| CN103586642B (en) | Plate hub core manufacturing process | |
| CN114654168A (en) | Processing technology of high-lock nut for aerospace | |
| CN106513527B (en) | A kind of preparation facilities and preparation method of the Marmem dead ring of low cost | |
| CN212003869U (en) | Special-shaped eccentric pin column | |
| Liu et al. | Influence of punch shape on geometrical profile and quality of hole piercing-flanging under high pressure | |
| CN109439878B (en) | Heat treatment method for controlling deformation taper of primary sun gear internal spline | |
| CN215357411U (en) | Frock is used to high efficiency flange car external diameter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |