CN106482632B - Method and jig for detecting flatness of metal piece - Google Patents
Method and jig for detecting flatness of metal piece Download PDFInfo
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- CN106482632B CN106482632B CN201611232792.0A CN201611232792A CN106482632B CN 106482632 B CN106482632 B CN 106482632B CN 201611232792 A CN201611232792 A CN 201611232792A CN 106482632 B CN106482632 B CN 106482632B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/34—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring roughness or irregularity of surfaces
Abstract
The invention provides a method and a jig for detecting the flatness of a metal piece, which are characterized by comprising a power supply (4), a first plane and a second plane which are made of metal and are arranged oppositely, and a positioning piece for positioning the metal piece between the first plane and the second plane; when the metal piece is located between the first plane and the second plane, the distance between the first plane and the second plane is equal to the sum of the design thickness of the metal piece and the tolerance of the design flatness, one pole of the power supply is electrically connected with the metal piece, the other pole of the power supply is connected with two detection branch circuits which are connected in parallel, one of the detection branch circuits is sequentially connected with a first alarm (41) and the first plane in series, and the other detection branch circuit is sequentially connected with a second alarm (42) and the second plane in series. The jig is convenient and quick to operate, and can improve the detection efficiency and the detection reliability.
Description
Technical Field
The invention relates to the technical field of flatness detection, in particular to a method and a jig for detecting the flatness of a metal piece.
Background
The mobile phone front shell steel sheet is a component for installing a touch screen, a flat groove is formed in the middle of the mobile phone front shell steel sheet, a circle of flanging called a reference surface is arranged around the groove, and in actual production, the flatness of the mobile phone front shell steel sheet needs to be detected, specifically, whether the flatness of the groove meets a control standard or not is detected.
At present, the method for detecting the flatness of the steel sheet of the front shell of the mobile phone generally adopts a clearance gauge to combine with a matched iron block for segmented detection, in each segment, the iron block is firstly attached to the surface of the steel sheet of the front shell of the mobile phone, and then the clearance between the steel sheet of the front shell of the mobile phone and the iron block is detected by the clearance gauge. This detection method has the following disadvantages: the method has the advantages of large manpower consumption, inconvenient operation, low detection efficiency, incapability of completely covering the detected plane by segmented detection, easy missing detection and difficulty in ensuring the detection reliability.
In summary, how to better detect the flatness of the steel sheet of the front shell of the mobile phone is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the invention provides a method and a jig for detecting the flatness of a metal part, which are convenient and fast to operate, and can improve the detection efficiency and the detection reliability, so that the flatness of a steel sheet of a front shell of a mobile phone can be better detected.
In order to achieve the purpose, the invention provides the following technical scheme:
a jig for detecting the flatness of a metal piece comprises a power supply, a first plane and a second plane which are made of metal and arranged oppositely, and a positioning piece for positioning the metal piece between the first plane and the second plane;
when the metal piece is located between the first plane and the second plane, the distance between the first plane and the second plane is equal to the sum of the design thickness of the metal piece and the tolerance of the design flatness, one pole of the power supply is electrically connected with the metal piece, the other pole of the power supply is connected with two detection branch circuits which are connected in parallel, one of the detection branch circuits is sequentially connected with the first alarm device and the first plane in series, and the other detection branch circuit is sequentially connected with the second alarm device and the second plane in series.
Preferably, in the above jig, the metal piece is a steel sheet of a front shell of the mobile phone.
Preferably, in the above jig, the jig includes an upper die and a lower die that are matched with each other, the steel sheet of the front shell of the mobile phone has a reference flanging, the inner side of the reference flanging is a groove to be detected, the lower die has a first metal detection platform that is adapted to the size of the groove, the surface of the first metal detection platform forms the first plane, the upper die has a second metal detection platform that is adapted to the size of the groove, and the surface of the second metal detection platform forms the second plane.
Preferably, in the above jig, the positioning element is a reference platform disposed on the lower die, the reference platform is used for being attached to the reference flange, and a distance that the first metal detection platform is higher than the reference platform is equal to a difference value obtained by subtracting a half of the design flatness tolerance from the design depth of the groove.
Preferably, in the above jig, the reference platform is provided with a hole, an elastic conductive post slightly higher than the reference platform is installed in the hole, and when the reference flange of the mobile phone front shell steel sheet is attached to the reference platform, the mobile phone front shell steel sheet is electrically connected to one electrode of the power supply through the elastic conductive post.
Preferably, in the above jig, the first plane and/or the second plane are made of copper material.
Preferably, in the above jig, the first alarm and/or the second alarm are/is an indicator light.
A method for detecting the flatness of a metal piece uses the jig and comprises the following steps:
placing the metal piece in the middle of the first plane and the second plane by means of the positioning piece;
and starting the power supply, if the first alarm and/or the second alarm are/is started, judging that the detected flatness is unqualified, and if the first alarm and the second alarm are not started, judging that the detected flatness is qualified.
The working principle of the jig for detecting the flatness of the metal piece provided by the invention is that the first plane and the second plane made of metal cover the detected surface of the metal piece, when the metal piece is positioned between the first plane and the second plane, the distance between the first plane and the second plane is equal to the sum of the design thickness of the metal piece and the tolerance of the design flatness, namely, the distance between the ideal surface of one side of the metal piece and the first plane is equal to half of the tolerance of the design flatness, the distance between the ideal surface of the other side and the second plane is also equal to half of the tolerance of the design flatness, therefore, if the flatness of the metal piece is not qualified, the actual surface of the metal piece is contacted with the first plane and/or the second plane, the circuit is conducted, and the first alarm and/or the second alarm are/is started, so that whether the flatness of the front shell steel sheet of the mobile phone is qualified or not is judged visually.
When the jig provided by the invention is used for detecting the flatness of the steel sheet of the front shell of the mobile phone, the first plane and the second plane are used for completely covering the detected surface, the detection can be comprehensively carried out by one-time operation, the segmented detection is not needed, and the detection is not missed, so that the jig provided by the invention is convenient and quick to operate, and the detection efficiency and the detection reliability can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of a jig according to an embodiment of the present invention;
figure 2 is a schematic view of the piece 1 of figure 1;
FIG. 3 is a schematic view of the part 1 of FIG. 1 moved to a position closest to the part 3;
fig. 4 is a schematic diagram illustrating a fixture according to an embodiment of the present invention.
Labeled as:
1. an upper die; 11. a second metal detection platform; 2. a mobile phone front shell steel sheet; 3. a lower die; 31. a reference platform; 32. a first metal detection platform; 4. a power source; 41. a first detection indicator light; 42. and a second detection indicator light.
Detailed Description
For the purpose of facilitating understanding, the present invention will be further described with reference to the accompanying drawings.
The invention provides a jig for detecting the flatness of a metal piece, which comprises a power supply, a first plane, a second plane and a positioning piece, wherein the first plane and the second plane are made of metal and are oppositely arranged, and the positioning piece is used for positioning the metal piece between the first plane and the second plane;
when the metal piece is located between the first plane and the second plane, the distance between the first plane and the second plane is equal to the sum of the design thickness of the metal piece and the tolerance of the design flatness, one pole of the power supply is electrically connected with the metal piece, the other pole of the power supply is connected with two detection branch circuits which are connected in parallel, one of the detection branch circuits is sequentially connected with the first alarm and the first plane in series, and the other detection branch circuit is sequentially connected with the second alarm and the second plane in series.
By "the metal element is located intermediate the first plane and the second plane" it is meant that the distance between the ideal surface on one side of the metal element and the first plane is equal to the distance between the ideal surface on the other side of the metal element and the second plane.
As shown in fig. 1 to 4, fig. 1 is a schematic view of a jig according to an embodiment of the present invention; FIG. 2 is a schematic view of the piece 1 of FIG. 1; FIG. 3 is a schematic view of the part 1 of FIG. 1 moved to a position closest to the part 3; fig. 4 is a schematic diagram illustrating a fixture according to an embodiment of the present invention.
The embodiment is described with the metal piece being a steel sheet of a front shell of a mobile phone, and it can be understood that the detection principle when the metal piece is other products is the same as that of the embodiment.
As shown in the figure, a reference flanging (not marked in the figure) is arranged around the groove of the steel sheet 2 of the front shell of the mobile phone, and a half of the tolerance of the design flatness of the steel sheet 2 of the front shell of the mobile phone is called as a first distance.
The lower die 3 is provided with a reference platform 31 for being attached to a reference flanging, a first metal detection platform 32 which is adaptive to the size of the groove is horizontally arranged on the inner side of the reference platform 31, the upper surface of the first metal detection platform 32 is a first plane, the first metal detection platform 32 is higher than the reference platform 31, and the distance between the first metal detection platform 32 and the reference platform 31 is equal to the difference value obtained by subtracting the first distance from the design depth of the groove;
the upper die 1 can move up and down relative to the lower die 3, the upper die 1 is provided with a second metal detection platform 11 which is matched with the size of the groove, the lower surface of the second metal detection platform 11 is a second plane, and when the upper die 1 moves to the lowest position relative to the lower die 3, the distance between the second metal detection platform 11 and the first metal detection platform 32 is equal to the sum of the design thickness of the front shell steel sheet 2 of the mobile phone and the tolerance of the design flatness;
when the steel sheet 2 of the front shell of the mobile phone is located between the second metal detection platform 11 and the first metal detection platform 32, one pole of the power supply 4 is electrically connected with the steel sheet 2 of the front shell of the mobile phone, and the other pole is electrically connected with two detection branches connected in parallel, wherein one detection branch is connected with the first metal detection platform 32 and the first detection indicator lamp 41 in series, and the other detection branch is connected with the second metal detection platform 11 and the second detection indicator lamp 42 in series, as shown in fig. 4.
The alarm device adopts the indicator lamp as the alarm, and the alarm device can also adopt other forms, such as a buzzer and the like.
In this embodiment, the reference flanging of the mobile phone front shell steel sheet 2 and the reference platform 31 of the lower die 3 are mutually attached, so that the mobile phone front shell steel sheet 2 is positioned between the second metal detection platform 11 and the first metal detection platform 32, it should be noted that, in the present invention, it is not limited whether the mobile phone front shell steel sheet 2 has the reference flanging, and when the mobile phone front shell steel sheet 2 does not have the reference flanging, the positioning element may adopt other forms other than the reference platform 31, for example, a manipulator may be used to place the mobile phone front shell steel sheet 2.
In this embodiment, the reference platform 31 is provided with a hole (not shown in the figure), an elastic conductive column (not shown in the figure) slightly higher than the reference platform 31 is installed in the hole, and when the reference flange of the mobile phone front shell steel sheet 2 is attached to the reference platform 31, the mobile phone front shell steel sheet 2 is electrically connected with one electrode of the power supply 4 through the elastic conductive column.
In other embodiments, the front shell steel sheet 2 of the mobile phone can be electrically connected with one end of the power supply 4 in other forms, for example, a lead with a clamp can be adopted, the end of the lead is connected with the power supply 4, and the clamp of the lead is in clamping contact with the front shell steel sheet 2 of the mobile phone.
In this embodiment, in order to improve the reliability of the detection, the first metal detection platform 32 and the second metal detection platform 11 are preferably made of a metal material with high electrical conductivity, and therefore, the first metal detection platform 32 and/or the second metal detection platform 11 may be made of a copper material.
The invention also provides a method for detecting the flatness of the metal piece, which uses the jig of the invention and comprises the following steps:
placing the metal piece between the first plane and the second plane by means of a positioning piece;
and starting a power supply, if the first alarm and/or the second alarm are/is started, judging that the detected flatness is unqualified, and if the first alarm and the second alarm are not started, judging that the detected flatness is qualified.
The method of the invention is also described by taking the detection of the front shell steel sheet 2 of the mobile phone as an example, and specifically comprises the following steps:
s1, when the power supply 4 is turned off, the upper die 1 is moved upwards to a proper height, the mobile phone front shell steel sheet 2 is placed on the lower die 3, the groove faces downwards, and the reference flanging is attached to the reference platform 31.
The proper height is based on the condition that the mobile phone front shell steel sheet 2 can be conveniently placed.
And S2, moving the upper die 1 downward to the lowest position.
The "lowest position" is a position where the distance between the second metal detection platform 11 and the first metal detection platform 32 is equal to the sum of the design thickness of the mobile phone front shell steel sheet 2 plus the design flatness tolerance, and the position is set when designing and manufacturing the jig.
And S3, turning on the power supply 4, if the first detection indicator lamp 41 and/or the second detection indicator lamp 42 are/is turned on, judging that the flatness of the steel sheet 2 of the front shell of the mobile phone is unqualified, and if the first detection indicator lamp 41 and the second detection indicator lamp 42 are not turned on, judging that the flatness of the steel sheet 2 of the front shell of the mobile phone is qualified.
The working principle of the detection process is that the reference flanging of the mobile phone front shell steel sheet 2 is attached to the reference platform 31 of the jig, because the distance that the first metal detection platform 32 is higher than the reference platform 31 is equal to the difference value of the design depth of the groove of the mobile phone front shell steel sheet 2 minus the first distance (half of the design flatness tolerance of the mobile phone front shell steel sheet 2), and the distance between the second metal detection platform 11 and the first metal detection platform 32 when the upper die 1 moves to the lowest position is equal to the sum of the design thickness of the mobile phone front shell steel sheet 2 and the design flatness tolerance, if the flatness of the mobile phone front shell steel sheet 2 is unqualified, the mobile phone front shell steel sheet 2 will contact with the first metal detection platform 32 and/or the second metal detection platform 11, so the circuit is conducted, the first detection indicator lamp 41 and/or the second detection indicator lamp 42 will be lighted, therefore, whether the flatness of the steel sheet 2 of the front shell of the mobile phone is qualified or not can be visually seen.
When the tool provided by the invention is used for detecting the flatness of the steel sheet 2 of the front shell of the mobile phone, the first plane and the second plane are used for completely covering the detected surface, the comprehensive detection can be realized by one-time operation, the segmented detection is not needed, and the detection omission does not occur, so that the tool provided by the invention is convenient and quick to operate, and the detection efficiency and the detection reliability can be improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the 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 invention. Thus, the present invention 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 (5)
1. A jig for detecting the flatness of a metal piece is characterized by comprising a power supply, a first plane and a second plane which are made of metal and arranged oppositely, and a positioning piece for positioning the metal piece between the first plane and the second plane;
when the metal piece is positioned between the first plane and the second plane, the distance between the first plane and the second plane is equal to the sum of the design thickness of the metal piece and the tolerance of the design flatness, one pole of the power supply is electrically connected with the metal piece, the other pole of the power supply is connected with two detection branches which are connected in parallel, one of the detection branches is sequentially connected with the first alarm and the first plane in series, and the other detection branch is sequentially connected with the second alarm and the second plane in series;
the metal piece is a mobile phone front shell steel sheet (2);
the jig comprises an upper die (1) and a lower die (3) which are matched with each other, a reference flanging is arranged on the steel sheet (2) of the front shell of the mobile phone, a groove to be detected is arranged on the inner side of the reference flanging, the lower die (3) is provided with a first metal detection platform (32) which is adaptive to the size of the groove, the surface of the first metal detection platform (32) forms the first plane, the upper die (1) is provided with a second metal detection platform (11) which is adaptive to the size of the groove, and the surface of the second metal detection platform (11) forms the second plane;
the setting element is for set up in benchmark platform (31) on lower mould (3), benchmark platform (31) be used for with the laminating of benchmark turn-ups, first metal testing platform (32) are higher than the distance of benchmark platform (31) equals the design depth of recess subtracts the difference of half of design plane degree tolerance.
2. The jig of claim 1, characterized in that the reference platform (31) is provided with a hole, an elastic conductive column slightly higher than the reference platform (31) is installed in the hole, and when the reference flanging of the mobile phone front shell steel sheet (2) is attached to the reference platform (31), the mobile phone front shell steel sheet (2) is electrically connected with one electrode of the power supply (4) through the elastic conductive column.
3. The jig of any one of claims 1-2, wherein the first plane and/or the second plane are made of copper.
4. The jig according to claim 3, characterized in that the first alarm and/or the second alarm are indicator lights.
5. A method for detecting the flatness of a metal part, which is characterized by using the jig as claimed in any one of claims 1 to 4, and comprises the following steps:
placing the metal piece in the middle of the first plane and the second plane by means of the positioning piece;
and starting the power supply, if the first alarm and/or the second alarm are/is started, judging that the detected flatness is unqualified, and if the first alarm and the second alarm are not started, judging that the detected flatness is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611232792.0A CN106482632B (en) | 2016-12-28 | 2016-12-28 | Method and jig for detecting flatness of metal piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611232792.0A CN106482632B (en) | 2016-12-28 | 2016-12-28 | Method and jig for detecting flatness of metal piece |
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| Publication Number | Publication Date |
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| CN106482632A CN106482632A (en) | 2017-03-08 |
| CN106482632B true CN106482632B (en) | 2022-07-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107664727A (en) * | 2017-09-22 | 2018-02-06 | 铜陵市三盛电子有限公司 | A kind of thin film capacitor intelligent checking system |
| CN109186529A (en) * | 2018-10-13 | 2019-01-11 | 徐州天泽乘龙机械制造有限公司 | A kind of measurement of planeness system of band large-scale metal part |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD203966A1 (en) * | 1981-10-01 | 1983-11-09 | Gerhard Meister | SURFACE TEST UNIT, ESPECIALLY FOR LARGE MEASURING OBJECTS |
| CN202974171U (en) * | 2012-12-05 | 2013-06-05 | 亚光耐普罗精密注塑（天津）有限公司 | Device used for detecting flatness of handset casing |
| CN203824508U (en) * | 2014-03-31 | 2014-09-10 | 昆山研达电脑科技有限公司 | Product dimension measuring tool |
| CN204649167U (en) * | 2015-02-03 | 2015-09-16 | 深圳市东方亮彩精密技术有限公司 | Phone housing automatic detection plane degree device |
| CN204669460U (en) * | 2015-05-05 | 2015-09-23 | 东莞劲胜精密组件股份有限公司 | A kind of hand set machine shell flatness detecting device |
| CN204831173U (en) * | 2015-07-29 | 2015-12-02 | 东莞劲胜精密组件股份有限公司 | Plane degree detects machine |
| CN205102764U (en) * | 2015-11-17 | 2016-03-23 | 东莞常安精密工业有限公司 | Flatness testing apparatus |
| CN105423963A (en) * | 2015-12-29 | 2016-03-23 | 深圳市宝尔威精密机械有限公司 | Mobile phone shell flatness tester |
| CN205482757U (en) * | 2016-01-25 | 2016-08-17 | 惠州Tcl移动通信有限公司 | A quick detection tool for roughness detects |
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Effective date of registration: 20201104 Address after: Room 301, building 1, No. 189, Jiangyuan Road, Tangxia Town, Dongguan City, Guangdong Province 523000 Applicant after: Dongguan Hua Precision Technology Co., Ltd Address before: 523715, No. 189, Yuen Lu, Zhenjiang, Guangdong, Dongguan, Tangxia Applicant before: DONGGUAN GOOD MARK NEW PRECISION TECHNOLOGY Co.,Ltd. |
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