CN102270809A - Metallographic control method for crimping terminal - Google Patents
Metallographic control method for crimping terminal Download PDFInfo
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- CN102270809A CN102270809A CN2010102779892A CN201010277989A CN102270809A CN 102270809 A CN102270809 A CN 102270809A CN 2010102779892 A CN2010102779892 A CN 2010102779892A CN 201010277989 A CN201010277989 A CN 201010277989A CN 102270809 A CN102270809 A CN 102270809A
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- crimping
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Abstract
The invention discloses a metallographic control method for crimping a terminal. The method comprises the following steps that: a pressing-copper wire portion of a forefoot of a terminal is ground to a crimping central section of the forefoot; copper scraps produced by a surface of a crimping body during the grinding process are removed; a crimping metallographic graph is observed by utilizing CCD and measurement is carried out by a two-dimensional measuring tool; and the crimping metallographic graph and a metallographic standard graph are compared to determine a crimping quality. According to the metallographic control method for crimping the terminal provided in the invention, control on the crimping quality of the terminal is improved on the control basis of an original height, an original width, and an original tensile strength. Moreover, according to the method, terminal crimping reliability can be determined directly by an appearance comparison and a result on CCD projection; a control level for crimping the terminal can be improved; and stability of the terminal crimping portion can also be enhanced.
Description
Technical field
The present invention relates to the electrical fitting technical field, particularly relate to a kind of metallographic control method of terminal crimping.
Background technology
Industry is interior for the be connected control of electric wire with connector at present, substantially all be with crimping, welding and welding are main, to in fact various types of single lines, coaxial line, shielding conductor and twisted-pair feeder, in the time of can control of quality when considering non-destructive method and the not too skilled personnel of operation technique to operate, crimping is confirmed to be topmost method, instrument and machine that the crimping great majority use all have the characteristics of complete alternation, and do not need the operator to do any judgement, this type of high pressure termination is bubble-tight, and this makes his mechanical stress to existing in the canonical system, thermal stress and chemical stress Fails To Respond.Use the high speed press-connection machine and use preconditioning technique, can reduce assembly cost, the crimping characteristic of terminal is achieved.Present major control means for the terminal crimping are height, the width of control terminal crimping in the industry, guarantee the closure state and the assembling effect of terminal crimping; The tensile strength of control terminal and electric wire guarantees that terminal and electric wire form firm being connected.Yet, above-mentioned control method, because just from the method control electric wire of outward appearance and mechanical pulling force and the reliability that is connected of terminal, the actual site of action and connection state for electric wire and terminal inside, can not clearly discern, after causing reusing, can occur connecting not firm and risk that break.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is how to adopt effective control method that terminal is controlled effectively with the steadiness that is connected quality and the continuation of electric wire.
(2) technical scheme
For solving the problems of the technologies described above, a kind of metallographic control method of terminal crimping is provided, comprise step:
S1 presses copper cash partly to be ground to the middle part of the forward foot in a step crimping terminal forward foot in a step;
S2 removes the copper scale that the crimping body surface produces in the process of lapping;
S3 utilizes CCD that the crimping metallograph is observed and measures by two-dimentional measuring tool;
S4 compares crimping metallograph and the metallographic standard drawing that obtains among the step S3 to determine the crimping quality.
Preferably, among the step S1, utilize milling tool to grind.
Preferably, in step S2, utilize acid flux material and alcohol to remove copper scale.
Preferably, described step S3 comprises the thickness of the crimping curled ends that measures terminal terminal after the distance of bottom, the crimping, the external diameter of single conductor, the height and the thickness of both sides burr.
Preferably, described step S4 comprises: if the crimping curled ends of terminal is asymmetric or conductor in obvious slit is arranged between single line and single line, then crimping is defective.
Preferably, described step S4 comprises: if the crackle in the terminal appears radially expanding in terminal crimping position, then crimping is defective.
Preferably, described step S4 comprises: if the crimping curled ends of terminal links to each other with other positions of terminal, then crimping is defective.
Preferably, described step S4 comprises:
If terminal crimping curled ends apart from the distance of bottom less than crimping after terminal thickness 1/2, then crimping is defective.
Preferably, described step S4 comprises: if the spacing between two crimping curled ends of terminal greater than the external diameter of single conductor, then crimping is defective.
Preferably, described step S4 comprises: if the burr of terminal both sides is high above the thickness after the terminal crimping after the crimping, perhaps the width of burr is above 1/2 of terminal thickness after the terminal crimping, and then crimping is defective.
(3) beneficial effect
Metallographic control method by terminal crimping of the present invention, make terminal crimping quality control on the control basis of original height, width and tensile strength, be improved, method of the present invention can be very directly by the reliability of the results verification terminal crimping of outward appearance comparison and CCD projection, control level to the crimping of lifting terminal is higher, and the soundness of terminal crimping part improves.
Description of drawings
Fig. 1 is the metallographic grinding figure of terminal crimping;
Fig. 2-Fig. 7 is the terminal crimping metallographic criterion figure according to embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Be illustrated in figure 1 as the metallographic grinding figure of terminal crimping, the metallographic control method of the terminal crimping that provides according to the embodiment of the invention comprises step: S1, utilize milling tool to press copper cash partly to be ground to the middle part of the forward foot in a step crimping terminal forward foot in a step; S2 utilizes acid flux material and alcohol to remove the copper scale that the crimping body surface produces in the process of lapping; S3, utilize CCD (Charge-coupled Device, charge coupled cell) the crimping metallograph is observed and measured, comprise the thickness of the crimping curled ends that measures terminal terminal after the distance of bottom, the crimping, the external diameter of single conductor, the height and the thickness of both sides burr by two-dimentional measuring tool; S4 compares crimping metallograph and the metallographic standard drawing that obtains among the step S3 to determine the crimping quality.
Satisfy following metallographic requirement at 6, can judge, electric wire fully is connected with terminal and contacts, bad phenomenon such as can not occurring not contacting conductor fully, break conductor, terminal cracking, copper wire are pitched out, and satisfactory tensile strength.
Be depicted as terminal crimping metallographic criterion figure as Fig. 2-8, as seen the terminal crimping metallographic standard that need satisfy is: the first, all single lines are irregular polygon and crimping curled ends a and b symmetry substantially, no obvious slit (Fig. 2) between single line and single line in the conductor; If the crimping curled ends of terminal is asymmetric or conductor in obvious slit is arranged between single line and single line, then crimping is defective.The second, crackle shown in Figure 3 must not appear in terminal crimping position, if the crackle in the terminal, then crimping defective (Fig. 3) appear radially expanding in terminal crimping position.Three, crimping curled ends a, the b of terminal can not be connected with other positions of terminal, if crimping curled ends a, the b of terminal link to each other with other positions of terminal, and then crimping defective (Fig. 4).If the 4th terminal crimping curled ends a, b apart from the distance of bottom less than crimping after the terminal thickness t 1/2, then crimping defective (Fig. 5).Five, the spacing of terminal crimping curled ends a, b make-up should be less than the external diameter (Fig. 6) of single conductor, if this spacing greater than the external diameter of single conductor, then crimping is defective.Six, the burr height e of terminal both sides is no more than thickness g after the terminal crimping after the crimping, and burr width f is no more than terminal thickness g half (Fig. 7); If the burr height e of terminal both sides is above the thickness after the terminal crimping after the crimping, perhaps the width of burr is above 1/2 of terminal thickness after the terminal crimping, and then crimping is defective.
As can be seen from the above embodiments, the embodiment of the invention is by adopting the metallographic control method of terminal crimping, make terminal crimping quality control on the control basis of original height, width and tensile strength, be improved, method of the present invention can be very directly by the reliability of the results verification terminal crimping of outward appearance comparison and CCD projection, control level to the crimping of lifting terminal is higher, and the soundness of terminal crimping part improves.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (10)
1. the metallographic control method of a terminal crimping is characterized in that, comprises step:
S1 presses copper cash partly to be ground to the middle part of the forward foot in a step crimping terminal forward foot in a step;
S2 removes the copper scale that the crimping body surface produces in the process of lapping;
S3 utilizes CCD that the crimping metallograph is observed and measures by two-dimentional measuring tool;
S4 compares crimping metallograph and the metallographic standard drawing that obtains among the step S3 to determine the crimping quality.
2. the metallographic control method of terminal crimping as claimed in claim 1 is characterized in that, among the step S1, utilizes milling tool to grind, and described milling tool is a terminal fractograph analysis instrument
3. the metallographic control method of terminal crimping as claimed in claim 1 is characterized in that, in step S2, utilizes corrosive liquid to remove the copper scale that process of lapping produces
4. the metallographic control method of terminal crimping as claimed in claim 1 is characterized in that, described step S3 comprises the thickness of the crimping curled ends that measures terminal terminal after the distance of bottom, the crimping, the external diameter of single conductor, the height and the thickness of both sides burr.
5. as the metallographic control method of each described terminal crimping of claim 1-4, it is characterized in that described step S4 comprises:
If the crimping curled ends of terminal is asymmetric or conductor in obvious slit is arranged between single line and single line, then crimping is defective.
6. as the metallographic control method of each described terminal crimping of claim 1-4, it is characterized in that described step S4 comprises:
If the crackle in the terminal appears radially expanding in terminal crimping position, then crimping is defective.
7. as the metallographic control method of each described terminal crimping of claim 1-4, it is characterized in that described step S4 comprises:
If the crimping curled ends of terminal links to each other with other positions of terminal, then crimping is defective.
8. as the metallographic control method of each described terminal crimping of claim 1-4, it is characterized in that described step S4 comprises:
If terminal crimping curled ends apart from the distance of bottom less than crimping after terminal thickness 1/2, then crimping is defective.
9. as the metallographic control method of each described terminal crimping of claim 1-4, it is characterized in that described step S4 comprises:
If the spacing between two crimping curled ends of terminal is greater than the external diameter of single conductor, then crimping is defective.
10. as the metallographic control method of each described terminal crimping of claim 1-4, it is characterized in that described step S4 comprises:
If the burr of terminal both sides is high above the thickness after the terminal crimping after the crimping, perhaps the width of burr is above 1/2 of terminal thickness after the terminal crimping, and then crimping is defective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102779892A CN102270809A (en) | 2010-09-08 | 2010-09-08 | Metallographic control method for crimping terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102779892A CN102270809A (en) | 2010-09-08 | 2010-09-08 | Metallographic control method for crimping terminal |
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| Publication Number | Publication Date |
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| CN102270809A true CN102270809A (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102779892A Pending CN102270809A (en) | 2010-09-08 | 2010-09-08 | Metallographic control method for crimping terminal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238463A (en) * | 2014-09-17 | 2014-12-24 | 华南理工大学 | Full-automatic single-ended and double-ended tangent wire stripping terminal pressure welding machine control system |
| CN109580614A (en) * | 2017-09-29 | 2019-04-05 | 富士康(昆山)电脑接插件有限公司 | Metallographic etching agent, the method for displaying metallographic structure for crimping core wire |
| CN111665267A (en) * | 2020-06-16 | 2020-09-15 | 沈阳兴华航空电器有限责任公司 | Visual detection method for compression joint quality of pit-pressing type contact |
| CN113433133A (en) * | 2020-03-23 | 2021-09-24 | 株式会社东芝 | Pressure welding judging method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168736A (en) * | 1988-11-22 | 1992-12-08 | Kabelwerke Reinshagen Gmbh | Crimping machine |
| US20020022414A1 (en) * | 2000-06-12 | 2002-02-21 | Hironori Kitagawa | Press-clamping terminal and method of examining press-clamped condition thereof |
| JP2002107302A (en) * | 2000-09-28 | 2002-04-10 | Yazaki Corp | Method and device for inspecting terminal metal fixture |
| EP1780846A1 (en) * | 2005-10-27 | 2007-05-02 | komax Holding AG | Measuring head and method for determination of crimp height of a conductor |
| CN1976126A (en) * | 2005-12-02 | 2007-06-06 | 日本特殊陶业株式会社 | Press-fit joint, gas sensor comprising same, and method for manufacturing same |
| EP1837622A1 (en) * | 2006-03-16 | 2007-09-26 | komax Holding AG | Method and device for determining the geometrical data of a cable crimp |
| CN101227055A (en) * | 2007-01-18 | 2008-07-23 | 矢崎总业株式会社 | Method of measuring metal terminal and apparatus for measuring the same |
-
2010
- 2010-09-08 CN CN2010102779892A patent/CN102270809A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168736A (en) * | 1988-11-22 | 1992-12-08 | Kabelwerke Reinshagen Gmbh | Crimping machine |
| US20020022414A1 (en) * | 2000-06-12 | 2002-02-21 | Hironori Kitagawa | Press-clamping terminal and method of examining press-clamped condition thereof |
| JP2002107302A (en) * | 2000-09-28 | 2002-04-10 | Yazaki Corp | Method and device for inspecting terminal metal fixture |
| EP1780846A1 (en) * | 2005-10-27 | 2007-05-02 | komax Holding AG | Measuring head and method for determination of crimp height of a conductor |
| CN1976126A (en) * | 2005-12-02 | 2007-06-06 | 日本特殊陶业株式会社 | Press-fit joint, gas sensor comprising same, and method for manufacturing same |
| EP1837622A1 (en) * | 2006-03-16 | 2007-09-26 | komax Holding AG | Method and device for determining the geometrical data of a cable crimp |
| CN101227055A (en) * | 2007-01-18 | 2008-07-23 | 矢崎总业株式会社 | Method of measuring metal terminal and apparatus for measuring the same |
Non-Patent Citations (2)
| Title |
|---|
| 昆山华乃尔精密仪器有限公司: "《中国贸易网》", 15 September 2010 * |
| 苏州欧卡精密光学仪器有限公司: "《仪表展览网》", 18 July 2010 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238463A (en) * | 2014-09-17 | 2014-12-24 | 华南理工大学 | Full-automatic single-ended and double-ended tangent wire stripping terminal pressure welding machine control system |
| CN109580614A (en) * | 2017-09-29 | 2019-04-05 | 富士康(昆山)电脑接插件有限公司 | Metallographic etching agent, the method for displaying metallographic structure for crimping core wire |
| CN113433133A (en) * | 2020-03-23 | 2021-09-24 | 株式会社东芝 | Pressure welding judging method |
| CN111665267A (en) * | 2020-06-16 | 2020-09-15 | 沈阳兴华航空电器有限责任公司 | Visual detection method for compression joint quality of pit-pressing type contact |
| CN111665267B (en) * | 2020-06-16 | 2023-06-13 | 沈阳兴华航空电器有限责任公司 | Visual detection method for crimping quality of pit-press type contact |
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Application publication date: 20111207 |