CN113909574A - Groove machining method for earless supporting plate nut - Google Patents
Groove machining method for earless supporting plate nut Download PDFInfo
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- CN113909574A CN113909574A CN202111157854.7A CN202111157854A CN113909574A CN 113909574 A CN113909574 A CN 113909574A CN 202111157854 A CN202111157854 A CN 202111157854A CN 113909574 A CN113909574 A CN 113909574A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/20—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
The invention discloses a groove processing method of a lug-free supporting plate nut, which comprises the following steps: fitting a deformation curve, designing a special numerical control cutter, designing special positioning, processing a tool, processing and detecting the size of a product. The riveting upset head and the interlayer of the invention can not generate the defects of warping, flanging and cracking, and the riveting is in place and has full deformation.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a groove machining method of a lug-free supporting plate nut.
Background
As a novel fastener (shown in figure 1), the earless supporting plate nut has the characteristics of light weight, high connection strength, simplicity and convenience in installation and the like. The product only needs to be provided with one mounting hole, the number of the holes is about 1/3 of the traditional supporting plate nut, the structural integrity of the machine body can be improved, the loss of structural strength is small, the stress concentration degree is low, the possibility of stress damage is reduced, and a certain strengthening effect is realized on a base body; the rivet is not needed during installation, the strength reduction of the matrix caused by rivet hole making and the thickness required by the rivet counter bore do not need to be considered, the thickness of the matrix can be reduced, and the weight reduction effect is achieved; through self riveting molding, the riveting molding rate and the efficiency are more reliable and efficient than the traditional rivet structure, and the single-side riveting device can be used for single-side riveting in narrow space. The riveting shaping of this product is the key point of this product, and its degree of difficulty is very big, and domestic product is when actual assembly uses at present, and its riveting shaping rate still waits to further promote, just can satisfy the user demand, and this type of product is mainly by the import at present.
The staking process, in turn, is primarily dependent upon the machining of the staking process dimensions (i.e., the grooves). The groove profile is subject to deformation, so that the size is not easy to control due to the deformed structural design in the groove profile. According to the existing processing method, the riveting forming of the product can be met as long as the size of the groove is ensured to be within a specified range, but the riveting forming rate is not high. According to the standard requirement, the riveting fixture can be installed in place in the states of the maximum interlayer thickness and the minimum interlayer thickness, and when the riveting fixture is riveted in the state of the maximum interlayer thickness, the product is easy to deform insufficiently and is not riveted in place, so that the size index of the standard specification is difficult to achieve; when riveting is carried out under the state of the minimum interlayer thickness, warping is easy to generate between the riveting upset head and the interlayer, and the defects of flanging and cracking are generated.
Disclosure of Invention
The invention aims to overcome the defects of warping, flanging and cracking between the riveting upset head and the interlayer, rivets in place and deforms fully.
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 groove processing method of a lug-free supporting plate nut, which comprises the following steps:
(1) and (3) fitting a deformation curve: according to the riveting forming principle of a product, the size change range meets the installation requirement of the product through researching the size change rule before and after riveting forming, so that a deformation curve of the product is fitted, and a drawing is drawn after the change rule of the deformation size is mastered;
(2) designing a special numerical control cutter: the rigidity of the cutter needs to ensure that no vibration is generated in the machining process;
(3) designing a special positioning and processing tool: a groove at one end of the processing tool (4) is horn-shaped, a through hole is arranged in the middle of the processing tool, the through hole is oval, and an opening is formed in the through hole;
(4) processing: clamping according to the requirements of a drawing to finish machining, wherein: the inner diameter size C and the length E of a groove at one end of the processing tool (4) are processed twice, the horn-shaped included angle of the groove at one end of the processing tool (5) for the first time is 75-77 degrees, the processing allowance for the second time is 0.1-0.15 mm, the horn-shaped included angle of the groove at one end of the processing tool (4) is 60 degrees, the height size of the special-shaped head of a product, the size of a unthreaded hole and the rough processing of the shape size of the groove are guaranteed by the first processing, the inner diameter size C, the length size E and the angle size beta of the groove are finely processed for the second time, and the length between Tmin and E is 1.2 mm.
(6) Detecting the size of a product: and a special measuring tool is adopted for detection.
Compared with the prior art, the invention has obvious advantages and beneficial effects. According to the technical scheme, the size change range meets the installation requirement of the product through researching the size change rule before and after riveting forming according to the riveting forming principle of the product, so that the deformation curve of the product is fitted, and the change rule of the deformation size is mastered; the rigidity of the cutter needs to ensure that no vibration is generated in the machining process; a groove at one end of the processing tool (4) is horn-shaped, a through hole is arranged in the middle of the processing tool, the through hole is oval, and an opening is formed in the through hole; clamping according to the requirements of a drawing to finish machining, wherein: the inner diameter size C and the length E of a groove at one end of the processing tool (4) are processed twice, the horn-shaped included angle of the groove at one end of the processing tool (5) for the first time is 75-77 degrees, the processing allowance for the second time is 0.1-0.15 mm, the horn-shaped included angle of the groove at one end of the processing tool (4) is 60 degrees, the height size of the special-shaped head of a product, the size of a unthreaded hole and the rough processing of the shape size of the groove are guaranteed by the first processing, and the inner diameter size C, the length size E and the angle size beta of a groove are precisely processed for the second time. In fig. 5, Tmin represents the length before the thread is machined, and is detected by a special gauge. The consistency of the size of the product groove is ensured, so that the consistency of the riveting forming of the head of the product is ensured, and the riveting requirement of the deformation area of the thick-thin interlayer is met. Finally, the requirements of the product in actual installation and use are met, and the use efficiency of the product is improved. In a word, the riveting upset head and the interlayer of the invention can not generate the defects of warping, flanging and cracking, and the riveting is in place and the deformation is sufficient.
Drawings
FIG. 1 is a schematic view of the head, rod, and deformation zone of the present invention;
FIG. 2 is a view from the direction of FIG. 1A;
FIG. 3 is a graph of a nut forming fit according to the present invention;
FIG. 4 is a partial cross-sectional view of a first machining tool and a blank product of the present invention;
FIG. 5 is a right side view of the tooling of the present invention;
FIG. 6 is a partial cross-sectional view of a second pass of the tooling and blank product of the present invention;
FIG. 7 is a schematic view of a groove structure of the first machining tool of the present invention;
fig. 8 is a schematic diagram of a groove structure of the processing tool for the second processing of the invention.
In the drawings, reference numerals
1. A head portion; 2. a rod body; 3. and 4, a deformation area, 4, a processing tool, 5 and a blank product.
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 invention discloses a groove processing method of a lug-free supporting plate nut, which comprises the following steps:
(1) and (3) fitting a deformation curve: according to the riveting forming principle of a product, the size change range meets the installation requirement of the product through researching the size change rule before and after riveting forming, so that a deformation curve of the product is fitted, and a drawing is drawn after the change rule of the deformation size is mastered;
(2) designing a special numerical control cutter: the rigidity of the cutter needs to ensure that no vibration is generated in the machining process;
(3) designing a special positioning and processing tool: a groove at one end of the processing tool (4) is horn-shaped, a through hole is arranged in the middle of the processing tool, the through hole is oval, and an opening is formed in the through hole;
(4) processing: clamping according to the requirements of a drawing to finish machining, wherein: divide into twice processing to the internal diameter size C and the length E of processing frock (4) one end recess, the horn-shaped contained angle of processing frock (5) one end recess for the first time is 75, the machining allowance of the second time is 0.1mm, the horn-shaped contained angle of processing frock (4) one end recess is 60, the heterotypic head height dimension of product is guaranteed in the first processing, the rough machining of unthreaded hole size and recess shape size, the internal diameter size C of the finish machining recess of the second time, length size E and angle size beta, length between Tmin and E is 1.2 mm.
(6) Detecting the size of a product: and a special measuring tool is adopted for detection.
Example two
The invention discloses a groove processing method of a lug-free supporting plate nut, which comprises the following steps:
(1) and (3) fitting a deformation curve: according to the riveting forming principle of a product, the size change range meets the installation requirement of the product through researching the size change rule before and after riveting forming, so that a deformation curve of the product is fitted, and a drawing is drawn after the change rule of the deformation size is mastered;
(2) designing a special numerical control cutter: the rigidity of the cutter needs to ensure that no vibration is generated in the machining process;
(3) designing a special positioning and processing tool: a groove at one end of the processing tool (4) is horn-shaped, a through hole is arranged in the middle of the processing tool, the through hole is oval, and an opening is formed in the through hole;
(4) processing: clamping according to the requirements of a drawing to finish machining, wherein: divide into twice processing to the internal diameter size C and the length E of processing frock (4) one end recess, the horn-shaped contained angle of processing frock (5) one end recess for the first time is 77, the machining allowance of the second time is 0.15mm, the horn-shaped contained angle of processing frock (4) one end recess is 60, the heterotypic head height dimension of product is guaranteed in the first processing, the rough machining of unthreaded hole size and recess shape size, the internal diameter size C of the finish machining recess of the second time, length size E and angle size beta, length between Tmin and E is 1.2 mm. (6) Detecting the size of a product: and a special measuring tool is adopted for detection.
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. The invention discloses a groove processing method of a lug-free supporting plate nut, which comprises the following steps:
(1) and (3) fitting a deformation curve: according to the riveting forming principle of a product, the size change range meets the installation requirement of the product through researching the size change rule before and after riveting forming, so that a deformation curve of the product is fitted, and a drawing is drawn after the change rule of the deformation size is mastered;
(2) designing a special numerical control cutter: the rigidity of the cutter needs to ensure that no vibration is generated in the machining process;
(3) designing a special positioning and processing tool: a groove at one end of the processing tool (4) is horn-shaped, a through hole is arranged in the middle of the processing tool, the through hole is oval, and an opening is formed in the through hole;
(4) processing: clamping according to the requirements of a drawing to finish machining, wherein: the inner diameter size C and the length E of a groove at one end of a processing tool (4) are processed twice, the horn-shaped included angle of the groove at one end of the processing tool (5) for the first time is 75-77 degrees, the processing allowance for the second time is 0.1-0.15 mm, the horn-shaped included angle of the groove at one end of the processing tool (4) is 60 degrees, the first processing ensures the rough processing of the height size of the special-shaped head, the size of a unthreaded hole and the shape size of the groove of a product, the inner diameter size C, the length size E and the angle size beta of the fine processing groove for the second time, and the length between Tmin and E is 1.2 mm;
(6) detecting the size of a product: and a special measuring tool is adopted for detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111157854.7A CN113909574A (en) | 2021-09-30 | 2021-09-30 | Groove machining method for earless supporting plate nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111157854.7A CN113909574A (en) | 2021-09-30 | 2021-09-30 | Groove machining method for earless supporting plate nut |
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| Publication Number | Publication Date |
|---|---|
| CN113909574A true CN113909574A (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111157854.7A Pending CN113909574A (en) | 2021-09-30 | 2021-09-30 | Groove machining method for earless supporting plate nut |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357726A (en) * | 1977-03-25 | 1982-11-09 | Amerace Corporation | Method of making self-locking nut |
| JP2002004495A (en) * | 2000-06-23 | 2002-01-09 | Nippon Steel Corp | Composite beam member and manufacturing method for it |
| CN102764963A (en) * | 2012-07-31 | 2012-11-07 | 江西洪都航空工业集团有限责任公司 | Method for machining, detecting, riveting and assembling earless pallet self-locking nut with elliptical head |
| CN105344899A (en) * | 2015-12-07 | 2016-02-24 | 中国航空工业集团公司北京航空制造工程研究所 | Cold heading method for TC16 titanium alloy anchor nut |
| US20170102304A1 (en) * | 2015-10-09 | 2017-04-13 | University Of Dammam | Non-destructive apparatus, system and method for determining pull-out capacity of anchor bolts |
| CN206785834U (en) * | 2017-06-09 | 2017-12-22 | 贵州航太精密制造有限公司 | A kind of earless plate nut of tail seal |
| CN109185311A (en) * | 2018-10-30 | 2019-01-11 | 贵州航瑞科技有限公司 | Titanium alloy tail portion seals earless plate nut and its processing method |
| CN110005683A (en) * | 2019-04-11 | 2019-07-12 | 东方蓝天钛金科技有限公司 | A kind of self-locking nut and its manufacture and installation method |
| CN210834153U (en) * | 2020-04-02 | 2020-06-23 | 成都迈特航空制造有限公司 | Ear-free supporting plate self-locking nut locking test device |
-
2021
- 2021-09-30 CN CN202111157854.7A patent/CN113909574A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357726A (en) * | 1977-03-25 | 1982-11-09 | Amerace Corporation | Method of making self-locking nut |
| JP2002004495A (en) * | 2000-06-23 | 2002-01-09 | Nippon Steel Corp | Composite beam member and manufacturing method for it |
| CN102764963A (en) * | 2012-07-31 | 2012-11-07 | 江西洪都航空工业集团有限责任公司 | Method for machining, detecting, riveting and assembling earless pallet self-locking nut with elliptical head |
| US20170102304A1 (en) * | 2015-10-09 | 2017-04-13 | University Of Dammam | Non-destructive apparatus, system and method for determining pull-out capacity of anchor bolts |
| CN105344899A (en) * | 2015-12-07 | 2016-02-24 | 中国航空工业集团公司北京航空制造工程研究所 | Cold heading method for TC16 titanium alloy anchor nut |
| CN206785834U (en) * | 2017-06-09 | 2017-12-22 | 贵州航太精密制造有限公司 | A kind of earless plate nut of tail seal |
| CN109185311A (en) * | 2018-10-30 | 2019-01-11 | 贵州航瑞科技有限公司 | Titanium alloy tail portion seals earless plate nut and its processing method |
| CN110005683A (en) * | 2019-04-11 | 2019-07-12 | 东方蓝天钛金科技有限公司 | A kind of self-locking nut and its manufacture and installation method |
| CN210834153U (en) * | 2020-04-02 | 2020-06-23 | 成都迈特航空制造有限公司 | Ear-free supporting plate self-locking nut locking test device |
Non-Patent Citations (1)
| Title |
|---|
| 金立翡: "动车铆钉焊缝连接件强度的有限元分析", 硕士论文, pages 27 - 41 * |
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