CN105008941A - Device and method for limiting force - Google Patents
Device and method for limiting force Download PDFInfo
- Publication number
- CN105008941A CN105008941A CN201380066542.2A CN201380066542A CN105008941A CN 105008941 A CN105008941 A CN 105008941A CN 201380066542 A CN201380066542 A CN 201380066542A CN 105008941 A CN105008941 A CN 105008941A
- Authority
- CN
- China
- Prior art keywords
- fixture
- spring
- sleeve
- bar
- electrical contact
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000012360 testing method Methods 0.000 claims description 33
- 230000002180 anti-stress Effects 0.000 claims description 5
- 230000002040 relaxant effect Effects 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2893—Handling, conveying or loading, e.g. belts, boats, vacuum fingers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6838—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping with gripping and holding devices using a vacuum; Bernoulli devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2855—Environmental, reliability or burn-in testing
- G01R31/286—External aspects, e.g. related to chambers, contacting devices or handlers
- G01R31/2865—Holding devices, e.g. chucks; Handlers or transport devices
- G01R31/2867—Handlers or transport devices, e.g. loaders, carriers, trays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2886—Features relating to contacting the IC under test, e.g. probe heads; chucks
- G01R31/2891—Features relating to contacting the IC under test, e.g. probe heads; chucks related to sensing or controlling of force, position, temperature
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Power Engineering (AREA)
- Manipulator (AREA)
- Measuring Leads Or Probes (AREA)
- Environmental & Geological Engineering (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Linear Motors (AREA)
Abstract
The invention relates to a force-limiting device (1) for limiting the force exerted by a linear actuator on a gripper of an electronic component, including: a first element (4, 7, 40, 41) arranged so as to be attached to said actuator so as to be linearly movable by said actuator; a second element (5, 6, 23, 50) arranged so as to be connected to said gripper so as to linearly move said gripper; an elastically compressible spring (3) arranged between the first element (4, 7, 40) and the second element (5, 6, 23, 50) in order to transmit and limit the force exerted by the first element on the second element; an electrical contact arranged so as to be in a first state when said spring (3) limits the force exerted on the second element, and in a second state when said spring does not limit the force exerted on the second element.
Description
Technical field
The present invention relates to the apparatus and method applying pressure on electronic components for being limited in duration of test.
Background technology
Electronic part production line generally includes testing a machine of the parts of test production wherein or processing.Many rotatable capstan heads comprising and be provided with some fixtures that tests a machine, this fixture gripper transmits them between some tests, mark or processing website.The parts adjoining land tower that rotates marches to another from a website, to stand different tests or procedure of processing.Fixture can be such as vacuum type pickup, and it lifts them by vacuum holding member and they are sent to the next one from a website.Exist and be provided with testing a machine of such as capstan head, this capstan head is with 32 or 62 fixtures and some tests or mark website.
In order to test parts electrically in test website, be necessary to set up electrical contact between the electric contact piece and the test unit of website of parts.For this purpose, parts usually test duration be placed in test bracket, that is, allowing it in duration of test housing ideally placed in the middle above the test contact element of website.In WO2011141582, describe an example of support, its content is incorporated to by reference.
In order to electronic unit to be tested is placed in the support of test website in succession, and and then fetch them, be necessary to make clamp machine automation to reduce and then raised feature.The known fixture that causes is with the dissimilar actuator of linear vertical mode movement.In WO2012073282, describe an example of this system, its content is incorporated to herein by reference.
The vertical force be applied on parts by fixture must be enough to very promptly acceleration components, to guarantee high speed.Some test websites also need test whole duration continue the fixture that presses on parts, to guarantee high-quality electrical contact.Thus the vertical force applied by known fixture typically belongs to 10 newton or a higher class.
Sometimes can occur, electronic unit to be tested is poorly placed in the middle on the end of fixture.Such as, use vacuum to keep the vacuum type pickup of electronic unit, so occur if fixture comprises, electronic unit is kept by edge instead of placed in the middle on the sharp-pointed end of vacuum type pickup.In this case, electronic unit can be no longer placed in the middle on the support of test website, and on the edge being placed in such as this support or against another point of test website.Then electrical contact occurs inadequately or not, and test produces the result of mistake.And if the vertical force applied by fixture is large, so it can damage electronic unit poorly placed in the middle above support.This causes the loss of parts and machine can be needed to stop removing the fragment of parts.Also can occur, these accidents are not promptly discovered, and the fragment of the electronic unit that is damaged will interrupt the test of following parts.
WO03071288 describes a kind of power restriction system being suitable for the test of electronic unit.But this system is not easy to the vertical force that can be adapted to be applied to by fixture (such as, vacuum type pickup) on parts.And its many fixtures being arranged on modern test capstan head are difficulties or expensive for its operation technique mechanism (such as, articulated connecting rod).
WO2012073282 suggestion is controlled by fixture applied pressure by the voice coil motor controlling to actuate the vertical movement of capstan head.This solution is complicated.And electron device discovers excessive power and the reaction time of reducing needed for it is significant, and make in the machine worked at high frequencies, parts can be impaired before system response.
Summary of the invention
One object of the present invention is, solves by such as to the problem mentioned hereinbefore that the reduction of the electronic unit bad placed in the middle on test bracket causes.
According to the present invention, these objects realize by means of the force limiting device of the power that the fixture for being limited in electronic unit is applied by linear actuator, it comprises: the first element, and it is arranged as to be attached to described actuator, so that removable linearly by described actuator; Second element, it is arranged as to be connected to described fixture, to move described fixture linearly; Flexibly compressible spring, to transmit and to be limited in the power that the second element is applied by the first element.
Such as allow restriction can be imparted to maximum, force on fixture by actuator to the resilient connection by means of spring of vacuum type pickup, this spring is being connected between the first element of linear actuator and the second element being connected to fixture.
This device can comprise electric contact piece, and it is in the first state when spring is limited in the power that the second element applies, and is in the second state when this spring is not limited in the power that the second element applies.Thus likely, when the collision such as between handle parts and a part for test website, such as, when the support of parts relative test website is poorly placed in the middle, check whether the antistress be applied on spring by fixture goes beyond the limit of value.Then the state checking contact is likely passed through, such as, by checking whether electric current passes through this contact thus discover this collision, carrys out in the event of a collision raised feature rapidly, to prevent it from damaging, and is spurted into classification website subsequently.
First element can comprise axial stem and rest surface, and an end of spring is placed in this rest surface.
Second element can comprise sleeve, and it can slide along this axial stem.
Spring can the force of compression between sleeve and the rest surface of the first element be compressed when going beyond the limit of.
End towards the axial stem of fixture can be connected to the first electrical contact surface.Sleeve can comprise the second electrical contact surface.First electrical contact surface and the second electrical contact surface setting each other when relaxing of spring, and when spring is compressed, when fixture is applied above the antistress of the limit away from each other.
First and second electrical contact surfaces can be in truncated cone and concentric shape.First surface in contact can belong to end around bar towards the second element and/or the contact element towards fixture.Second surface in contact can belong to opening cross-section by bar in the second element.
First element can comprise around bar install and with the first sleeve of bar electrical contact.Second element can comprise around bar install and only at relaxing of spring time and the second sleeve of bar electrical contact.
Second element can comprise the 3rd sleeve of insulating material, and it is installed around bar and allows bar directed when it moves relative to the second element.
The invention still further relates to testing a machine for electronic unit, this tests a machine and comprises: capstan head, and it is with the multiple fixtures firmly grasping electronic unit for the tower that rotates; At least one linear actuator, it is for moving a described fixture vertically relative to described capstan head, to reduce or to raise described parts; The limiter such as described hereinbefore, to limit the vertical force be applied to by actuator on fixture.
The invention still further relates to the method for being limited in the power that electronic unit fixture is applied by linear actuator, it comprises: reduce described fixture by means of described linear actuator; Once the antistress applied by fixture exceeds limits value, so interrupt reducing and interruptive current.
Accompanying drawing explanation
The example of embodiments of the invention provides in by the description shown in accompanying drawing, wherein:
Fig. 1 shows the longitdinal cross-section diagram when relaxing of spring according to force limiting device of the present invention.
Fig. 2 shows the longitdinal cross-section diagram when spring is compressed according to force limiting device of the present invention.
Embodiment
Moment limiting device 1 illustrated in the accompanying drawings be designed to be arranged on do not describe between linear actuator and the fixture do not described.Restraint device is fastened to the linear actuator at top place by means of the retention mechanism do not described in detail; Such as, device 1 circular shell 2 can screw connect, by pin or bayonet fastenings to the linear actuator that will be arranged on device 1.Linear actuator can such as be made up of linear motor, such as linear socket, step motor, voice coil motor etc.
Device 1 comprises the second element, and it is made up of the parts 5,50,6,23 being designed to be fastened to by means of the device do not described in detail fixture (such as, vacuum fixture).In an example, the parts 5 of device 1 can screw connect, by pin or bayonet fastenings to fixture, such as will be arranged on the vacuum type pickup under device 1.
Device 1 has the first element, and it comprises element 4,40,41 and 7 and housing 2.First element is connected to actuator with rigid manner, and thus it follows its vertical dislocation.Parts 4 are bars of conductive material.Element 40 has the opening for bar 4.Element 41 is first sleeves of conductive material, its by bar 4 cross-section and with this bar electrical contact; Electric connector 20 makes likely by this sleeve of pulse current injectingt and axle 4.The comparatively downside of element 41 also limits surface in contact 410, this surface of spring 3 setting.End towards the bar 7 of fixture (the bottom place at accompanying drawing) is provided with the contact element 70 of conductive material.This contact element comprises tapered segment shape in instances, and thus it limit truncated surface in contact 71.
Second element is connected to the fixture be arranged under device 1 with rigid manner.Second element comprises fastening pad 5, sleeve 50, second sleeve 6 and the 3rd sleeve 23.Fixture is arranged under the pad 5 of combining with sleeve 50 regularly.Sleeve 50 comprises blind hole opening, goes out as shown in FIG. 2, and the contact element 7 being connected to bar 4 can slide wherein.
Second sleeve 6 comprises permission contact lever 4 to be passed through and discontiguous opening.The distal end (on the direction of fixture) of this opening becomes larger in the part of circular cone, thus defines the cloudy surface in contact 71 corresponding with the positive contact portion 70 of contact element 7.3rd sleeve 23 is formed by insulating material, and allows bar 4 directed in the center of sleeve 6; It is also provided for the rest surface of the distal end of spring 3.
In position shown in Figure 1, spring 3 relaxes and promotes the second element 5,6,23,50 towards bottom, until the second surface in contact 71 contacts with the first surface in contact 70 of element 7.Be actuated so that when applying the power promoting sleeve 40 and 3 at actuator (description), this power is passed to the second element and the fixture thus extremely do not described by spring 3.
When in situation shown in figure 2, when the electronic unit kept by fixture is hindered by the barrier signified by star 51 in its whereabouts towards bottom, such as because it is placed in the middle and can not enter the support of test website, antistress is passed on the second element 5,50,6,23 by fixture, and thus this second element tends to Compress Spring 3.Thus surface in contact 70,71 tends to separated from one another, and this is by discovering in the interruption no longer arriving the electric current that the terminal 20 being connected to the terminal 21 of the second sleeve 6 injects.Then the electronic control unit do not described can discover this current interruptions, decide to raise actuator at once, thus raise fixture, and mark the parts that carried by this fixture for " not test (N.T.) " and/or placed in the middle, so that rejection or it is again placed in the middle in processing website subsequently.In EP2081034, describe an example of applicable electronic control circuit, its content is incorporated into this by reference.
Thus spring 3 limits the maximum, force that can be applied on fixture and on parts.In one embodiment, be enough to make surface 70, the power limit that 71 springs 3 separated from one another start to compress from here is included between 8 and 20 newton, preferably between 10 and 15 newton.
In superincumbent example, the bar 4 being connected to actuator slides in the sleeve 6 being connected to fixture.Also will likely put upside down this layout and provide bar, this bar be connected to fixture and slides in the sleeve being connected to actuator.Also likely providing package draws together the system of some bars, or without the system of bar, wherein, cylindrical housings 2 is transmitting force between the first and second elements.
Claims (9)
1. a force limiting device (1), the power applied by linear actuator on the fixture being limited in electronic unit, comprising:
First element (4,7,40,41), it is arranged as to be attached to described actuator, so that removable linearly by described actuator;
Second element (5,6,23,50), it is arranged as to be connected to described fixture, to move described fixture linearly;
Flexibly compressible spring (3), it is arranged between described first element (4,7,40) and described second element (5,6,23,50), to transmit and to be limited in the power that described second element is applied by described first element;
Electric contact piece, it is arranged as to be in the first state when described spring (3) is limited in the power that described second element applies; And be in the second state when described spring is not limited in the power that described second element applies.
2. device according to claim 1, is characterized in that,
Described first element comprises axial stem (4) and rest surface (410), and an end of described spring is placed in described rest surface (410);
Described second element comprises sleeve (23,6,50), and it can slide along described axial stem;
Described layout of spring is that the force of compression between described sleeve (23,6,50) and described first rest surface (410) is compressed when going beyond the limit of.
3. device according to claim 2, is characterized in that, the end of described axial stem (4) is connected to the first electrical contact surface (70),
Wherein, described sleeve comprises the second electrical contact surface (71),
Wherein, described first electrical contact surface and described second electrical contact surface are pressed against each other when described spring (3) is lax, and when described spring is compressed away from each other.
4. device according to claim 3, is characterized in that, described first and second electrical contact surfaces (70,71) are in truncated cone and concentric shape.
5. according to the device described in claim 3 or 4, it is characterized in that, comprise end around described bar (4) towards the contact element (7) of described second element (5), wherein, described first surface in contact (70) forms the part of described contact element (7).
6., according to the device described in claim 3 to 5, it is characterized in that,
Described first element (4,7,40,41) comprise around described bar (4) install and with first sleeve (41) of described bar electrical contact,
Described second element (5,6,23,50) comprise around described bar (4) install and only at described relaxing of spring time electrical contact described in second sleeve (6) of bar (2).
7. device according to claim 6, it is characterized in that, described second element (5,6,23,50) comprises the 3rd sleeve (23) formed by insulating material, and it is installed around described bar (4) and allows described bar (4) directed when it moves relative to described second element.
8. testing a machine for electronic unit, described in test a machine and comprise: capstan head, it is with the multiple fixtures for grasping electronic unit around described capstan head; At least one linear actuator, it is for moving a described fixture vertically relative to described capstan head, to reduce or to raise described parts; With according to the limiter described in claim 1 to 7, it is arranged between described actuator and described fixture to limit the vertical force applied by described actuator.
9., for being limited in a method for the power that electronic unit fixture is applied by linear actuator, comprising:
Described fixture is reduced by means of described linear actuator;
Once the antistress applied by described fixture exceeds limits value, so interrupt described reduction and interruptive current.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2874/12 | 2012-12-19 | ||
| CH28742012 | 2012-12-19 | ||
| PCT/EP2013/077437 WO2014096218A1 (en) | 2012-12-19 | 2013-12-19 | Device and method for limiting force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105008941A true CN105008941A (en) | 2015-10-28 |
| CN105008941B CN105008941B (en) | 2018-12-04 |
Family
ID=49956136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380066542.2A Expired - Fee Related CN105008941B (en) | 2012-12-19 | 2013-12-19 | Device and method for restraint |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2936176A1 (en) |
| KR (1) | KR20150097535A (en) |
| CN (1) | CN105008941B (en) |
| MY (1) | MY192591A (en) |
| PH (1) | PH12015501241A1 (en) |
| WO (1) | WO2014096218A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3311959A1 (en) * | 2016-10-19 | 2018-04-25 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | High-precision linear actuator |
| EP3757586B1 (en) * | 2019-06-26 | 2023-07-05 | Etel S.A. | Method and automated motion system for controlling a component handler |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4163970A (en) * | 1975-05-23 | 1979-08-07 | Allinquant F M | Pneumatic springs and other telescopic systems |
| US5422554A (en) * | 1993-03-05 | 1995-06-06 | Motorola, Inc. | Vacuum nozzle capable of adjustable placing force |
| US5685589A (en) * | 1995-07-27 | 1997-11-11 | Kabushiki Kaisha Shinkawa | Lead frame suction holding device |
| CN100437122C (en) * | 2002-02-20 | 2008-11-26 | 伊斯梅卡半导体控股公司 | Contact actuator with contact force controlling mechanism |
| CN101589518A (en) * | 2007-01-29 | 2009-11-25 | Esi电子科技工业公司 | Adjustable power contactor |
| CN101595391A (en) * | 2006-11-30 | 2009-12-02 | Sts仪器公司 | Be used for measuring head that electrical equipment is tested |
| CN103026555A (en) * | 2010-09-30 | 2013-04-03 | 伊斯梅卡半导体控股公司 | Electrical contact and testing platform |
| CN103229610A (en) * | 2010-11-30 | 2013-07-31 | 上野精机株式会社 | Electronic component holding device, electronic component inspecting device provided therewith, and electronic component classification device |
-
2013
- 2013-12-19 WO PCT/EP2013/077437 patent/WO2014096218A1/en active Application Filing
- 2013-12-19 KR KR1020157016285A patent/KR20150097535A/en not_active Withdrawn
- 2013-12-19 CN CN201380066542.2A patent/CN105008941B/en not_active Expired - Fee Related
- 2013-12-19 MY MYPI2015001485A patent/MY192591A/en unknown
- 2013-12-19 EP EP13821091.9A patent/EP2936176A1/en not_active Withdrawn
-
2015
- 2015-06-02 PH PH12015501241A patent/PH12015501241A1/en unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4163970A (en) * | 1975-05-23 | 1979-08-07 | Allinquant F M | Pneumatic springs and other telescopic systems |
| US5422554A (en) * | 1993-03-05 | 1995-06-06 | Motorola, Inc. | Vacuum nozzle capable of adjustable placing force |
| US5685589A (en) * | 1995-07-27 | 1997-11-11 | Kabushiki Kaisha Shinkawa | Lead frame suction holding device |
| CN100437122C (en) * | 2002-02-20 | 2008-11-26 | 伊斯梅卡半导体控股公司 | Contact actuator with contact force controlling mechanism |
| CN101595391A (en) * | 2006-11-30 | 2009-12-02 | Sts仪器公司 | Be used for measuring head that electrical equipment is tested |
| CN101589518A (en) * | 2007-01-29 | 2009-11-25 | Esi电子科技工业公司 | Adjustable power contactor |
| CN103026555A (en) * | 2010-09-30 | 2013-04-03 | 伊斯梅卡半导体控股公司 | Electrical contact and testing platform |
| CN103229610A (en) * | 2010-11-30 | 2013-07-31 | 上野精机株式会社 | Electronic component holding device, electronic component inspecting device provided therewith, and electronic component classification device |
Also Published As
| Publication number | Publication date |
|---|---|
| PH12015501241A1 (en) | 2015-08-17 |
| WO2014096218A1 (en) | 2014-06-26 |
| EP2936176A1 (en) | 2015-10-28 |
| MY192591A (en) | 2022-08-29 |
| CN105008941B (en) | 2018-12-04 |
| KR20150097535A (en) | 2015-08-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181204 Termination date: 20201219 |