CN105352469B - A kind of detection means of BGA tin ball surface circularity - Google Patents
A kind of detection means of BGA tin ball surface circularity Download PDFInfo
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- CN105352469B CN105352469B CN201510811093.0A CN201510811093A CN105352469B CN 105352469 B CN105352469 B CN 105352469B CN 201510811093 A CN201510811093 A CN 201510811093A CN 105352469 B CN105352469 B CN 105352469B
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Abstract
The invention discloses a kind of detection means of BGA tin ball surface circularity, including：Bottom plate；It is used for the vibrating device for producing vibration source on the bottom plate；Base unit on the vibrating device, it includes casing, support block, the first half ball grooves, first through hole, the first contact blade unit and vent line；The pressing unit on the top end face of the casing is arranged on, it includes vacuum adsorption plate, briquetting, the second half ball grooves, the second through hole and the second contact blade unit；Splicing unit on the lateral opening of the casing；Wherein, the vibrating device, the base unit, the pressing unit and the splicing unit are connected by circuit with control unit；The cell body is connected with the splicing unit.The present invention can effectively improve detection efficiency, it is ensured that the quality of tin ball, simple in construction, easy to use.
Description
Technical field：
It is more particularly to a kind of to be used to detect that BGA tin ball surface is justified the present invention relates to detection means technical field
The detection means of degree.
Background technology：
BGA tin balls are the piths of BGA welding, and automatic BGA tin ball feed mainly has the cutting remelting method of forming and injection
Two kinds of the method for forming, the former is the unit that the solder stick of different-diameter is cut into uniform quality, then is fused into glycerine
Ball；The latter is that solder is placed in specific container (crucible) to be melted, and is then inflated in crucible, and increase pressure makes fusing
Solder afterwards sprays from the specific aperture of crucible bottom, reuses the higher-order of oscillation and is allowed to balling-up.Either using cutting remelting
The method of forming or spray up moulding are required for carrying out surface roundness detection to the tin ball of formation, to ensure the quality of tin ball.It is existing
The method of tin ball is detected typically by what is visually judged, detection process wastes time and energy, and detection efficiency is low, the matter of tin ball
Amount is difficult to be guaranteed.
The content of the invention：
The purpose of the present invention aiming at prior art deficiency, and provide a kind of BGA tin ball surface circularity detection dress
Put, it can effectively improve detection efficiency, it is ensured that the quality of tin ball, it is simple in construction, it is easy to use.
The technology solution of the present invention is as follows：A kind of detection means of BGA tin ball surface circularity, including：Bottom plate；Install
It is used for the vibrating device for producing vibration source on the bottom plate；Base unit on the vibrating device, it includes setting
Put the casing on the top end face of the vibrating device, some support blocks being arranged in the casing, be molded over the support
Some the first half ball grooves on the top end face of block, it is molded over the first through hole of the first hemisphere trench bottom, installed in described
First on half ball groove inwall contacts blade unit, is arranged in the support block for connecting the first through hole and outside gas
The vent line in source, the casing has an accommodating cavity and top end face and one side are opening-like, and the support block is vertical and waits
Spacing is arranged in the accommodating cavity, is formed with cell body between the support block, and the bottom land of the cell body dips down setting；If
The pressing unit on the top end face of the casing is put, it includes the vacuum suction being engaged with the open top of the casing
Plate, be fixedly installed on the bottom face of the vacuum adsorption plate and with the one-to-one briquetting of the support block, be molded over it is described
Some the second half ball grooves on the bottom face of briquetting, the second through hole being molded at the top of the second half ball groove, installed in described
The second contact blade unit on the second half ball groove inwalls, the second half ball groove is enclosed jointly with the first half ball groove to be set to form one
Diameter of Spherical Volume for housing tin ball, second through hole is connected by connecting tube with the vacuum adsorption plate, the vacuum
The driver element for driving the vacuum adsorption plate motion is installed, the driver element includes driving gas on the top end face of adsorption plate
Cylinder and line slide rail, the piston rod of the drive cylinder are connected with the top end face of the vacuum adsorption plate, and cylinder body is arranged on described
On line slide rail；Splicing unit on the lateral opening of the casing；Wherein, the vibrating device, the pedestal list
First, described pressing unit and the splicing unit are connected by circuit with control unit；The cell body and the splicing unit
It is connected.
As the preferred of above-mentioned technical proposal, the first contact blade unit is is symmetricly set in the first half ball groove
A pair of first contact chips；The second contact blade unit is a pair second contacts being symmetricly set in the second half ball groove
Piece；Wherein, the symmetrical plane of the first contact blade unit coincides with second symmetrical plane for contacting blade unit, described
The symmetrical plane of first contact blade unit and the plane that second symmetrical plane for contacting blade unit is by the centre of sphere；It is described
First contact chip is equal with the size and shape of second contact chip.
As the preferred of above-mentioned technical proposal, the second half ball groove is enclosed with the first half ball groove sets the spherical sky to be formed
Between radius value be radius value and first contact chip of tin ball or the thickness value sum of second contact chip.
As the preferred of above-mentioned technical proposal, multiple positioning holes are formed on the edge of the top end face of the casing, it is described
The locating dowel corresponding with the positioning hole is formed on the bottom face of vacuum adsorption plate.
As the preferred of above-mentioned technical proposal, the splicing unit includes connecing on the lateral opening of the casing
Hopper, the link slot of bottom for being hinged on the splicing groove, the receiving cylinder on bottom plate and pulp-collecting box, wherein, it is described
The cylinder body of receiving cylinder is fixedly installed on the bottom plate, piston rod is connected with the bottom face of the link slot, the pulp-collecting box
The underface of the discharging opening of the link slot is arranged on, the splicing groove is arranged on the bottom of the lateral opening of the casing, institute
The center for stating the bottom of splicing groove forms connecting shaft, and the link slot is articulated with the splicing groove by the connecting shaft,
The splicing groove region relative with the lateral opening of the casing offers a tin ball passage, the bottom face of the tin ball passage
For a tapered plane tilted down.
As the preferred of above-mentioned technical proposal, on the end face that the splicing groove is engaged with the lateral opening of the casing into
Type has fixture block, and the lateral opening end of the casing forms the neck being engaged with the fixture block.
As the preferred of above-mentioned technical proposal, the angle of inclination of the bottom face of the tin ball passage is 15 °.
As the preferred of above-mentioned technical proposal, the vent line includes a common air chamber and some ventilations are in charge of, described
Common air chamber is in charge of with the ventilation and is connected.
As the preferred of above-mentioned technical proposal, the longitudinal cross-section of the cell body is in " U " type, the bottom land inclination angle of the cell body
Spend for 8 °.
The beneficial effects of the present invention are：
1) base unit and pressing unit can realize the automatic detection of tin ball, can effectively improve detection efficiency, protect
Tin ball quality is demonstrate,proved, it is simple in construction, it is easy to use；
2) vibrating device can provide vibration source to casing, so as to drive the tin ball in the first half ball grooves to fall into cell body；
3) vent line for connecting first through hole and external air source, therefore, external air source are provided with support block
Gas can be sprayed by the first through hole to the tin ball in the first half ball grooves, can effectively aid in tin ball to fall into cell body
It is interior.
Brief description of the drawings：
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein：
Fig. 1 is dimensional structure diagram of the invention；
Fig. 2 is decomposition texture schematic diagram of the invention；
Fig. 3 is the structural representation of the base unit of the present invention；
Fig. 4 is Fig. 3 cross-sectional view；
Fig. 5 is the structural representation of the pressing unit of the present invention；
Fig. 6 is Fig. 5 cross-sectional view；
Fig. 7 is the dimensional structure diagram of the splicing groove of the present invention；
Fig. 8 is the structural representation of the side-looking direction of the splicing groove of the present invention；
Fig. 9 is one of operating diagram of splicing unit of the present invention；
Figure 10 is the two of the operating diagram of the splicing unit of the present invention.
In figure, 10, bottom plate；20th, vibrating device；30th, base unit；31st, casing；311st, positioning hole；312nd, neck；32、
Support block；33rd, the first half ball grooves；34th, first through hole；35th, the first contact blade unit；36th, vent line；361st, common air chamber；
362nd, ventilation is in charge of；37th, cell body；40th, pressing unit；41st, vacuum adsorption plate；411st, locating dowel；42nd, briquetting；43rd, the second hemisphere
Groove；44th, the second through hole；45th, the second contact blade unit；46th, connecting tube；50th, splicing unit；51st, splicing groove；511st, fixture block；
512nd, connecting shaft；513rd, tin ball passage；52nd, receiving cylinder；53rd, link slot；54th, pulp-collecting box.
Embodiment：
Embodiment：Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by
Content disclosed in the present specification understands other advantages and effect of the present invention easily, " top " mentioned in the present embodiment,
The description such as " lower section ", " top ", " bottom " is defined according to common meaning, such as, the direction definition of reference to gravitational, weight
The direction of power be lower section, opposite direction be top, similarly up be top or top, lower section be bottom or
Bottom, is also only and is easy to narration to understand, and is not used to limit enforceable scope of the invention, the change of its relativeness or tune
It is whole, under without essence change technology contents, also when being considered as enforceable category of the invention.
As shown in Figure 1, a kind of detection means of BGA tin ball surface circularity, including：Bottom plate 10；Installed in the bottom plate 10
The upper vibrating device 20 for being used to produce vibration source；Base unit 30 on the vibrating device 20, is shown in Fig. 2 to Fig. 4 institutes
Show, the base unit 30 include be arranged on the top end face of the vibrating device 20 casing 31, be arranged on the casing 31
Interior some support blocks 32, some the first half ball grooves 33 being molded on the top end face of the support block 32, it is molded over described
The first through hole 34 of the bottom of half ball groove 33, the first contact blade unit 35 on the first half inwall of ball groove 33, set
Put is used for the vent line 36 for connecting the first through hole 34 and external air source, the vent line 36 in the support block 32
It is in charge of 362 including a common air chamber 361 and some ventilations, the common air chamber 361 is in charge of 362 with the ventilation and is connected, institute
Casing 31 is stated with an accommodating cavity and top end face and one side are opening-like, the support block 32 is vertical and is arranged at equal intervals
In the accommodating cavity, cell body 37 is formed between the support block 32, the bottom land of the cell body 37 dips down setting, the cell body
37 longitudinal cross-section is in " U " type, and the bottom land angle of inclination of the cell body 37 is 8 °, and the design of " U " type is easy to tin ball to roll, 8 °
Inclined design ensure that tin ball is smoothly slipped into the splicing unit 50, it is to avoid tin ball is blocked in the cell body 37；If
Put the pressing unit 40 on the top end face of the casing 31, as shown in Fig. 5 and Fig. 6, the pressing unit 40 include with it is described
Vacuum adsorption plate 41 that the open top of casing 31 is engaged, be fixedly installed on the bottom face of the vacuum adsorption plate 41 and with
The one-to-one briquetting 42 of support block 32, some the second half ball grooves 43 being molded on the bottom face of the briquetting 42, into
Second through hole 44 of the type at the top of the second half ball groove 43, the second contact chip on the second half inwall of ball groove 43
Unit 45, the second half ball groove 43 encloses to set to form a spherical sky for being used to house tin ball jointly with the first half ball groove 33
Between, second through hole 44 is connected by connecting tube 46 with the vacuum adsorption plate 41, the top of the vacuum adsorption plate 41
The driver element (not shown) for driving the vacuum adsorption plate 41 to move is installed, the driver element includes drive cylinder on face
(not shown) and line slide rail (not shown), the top end face of the piston rod of the drive cylinder and the vacuum adsorption plate 41 connect
Connect, cylinder body is arranged on the line slide rail；Splicing unit 50 on the lateral opening of the casing 31；Wherein, institute
State vibrating device 20, the base unit 30, the pressing unit 40 and the splicing unit 50 single with control by circuit
First (not shown) connection, the first contact blade unit 35 and the second contact blade unit 45 are single by circuit and the control
Member is connected；The cell body 37 is connected with the splicing unit 50.
As shown in Fig. 3 and Fig. 5, the first contact blade unit 35 is to be symmetricly set on first hemisphere described in the present embodiment
A pair of first contact chips in groove 33；The second contact blade unit 45 is one be symmetricly set in the second half ball groove 43
To the second contact chip；Wherein, the symmetrical plane of the first contact blade unit 35 contacts the symmetrical of blade unit 45 with described second
Plane coincides, and the symmetrical plane of the first contact blade unit 35 is with second symmetrical plane for contacting blade unit 45
By the plane of the centre of sphere；First contact chip is equal with the size and shape of second contact chip.Described first is contacted
The purpose that the symmetrical plane coincidence that the symmetrical plane of blade unit 35 contacts blade unit 45 with described second is set is in order that obtaining institute
Stating the first contact blade unit 35 and the second contact blade unit 45 can jointly enclose and set to form a whole circle, it is ensured that the standard of detection
True property.In the present embodiment, the second half ball groove 43 encloses the radius value for setting the diameter of Spherical Volume to be formed with the first half ball groove 33
For the thickness value sum of the radius value and first contact chip or second contact chip of tin ball.
As shown in Fig. 3 and Fig. 5, multiple positioning holes 311, the vacuum are formed on the edge of the top end face of the casing 31
Form the locating dowel 411 corresponding with the positioning hole 311 on the bottom face of adsorption plate 41, the positioning hole 311 with it is described
The setting of locating dowel 411 can be accurately pressure bonded on the base unit 30 for the ease of the pressing unit 40.
As shown in Fig. 1 and Fig. 2, the splicing unit 50 includes the splicing groove on the lateral opening of the casing 31
51st, the link slot 53 of the bottom of the splicing groove 51, the receiving cylinder 52 on bottom plate 10 and pulp-collecting box 54 are hinged on, its
In, the cylinder body of the receiving cylinder 52 is fixedly installed on the bottom plate 10, the bottom face phase of piston rod and the link slot 53
Even, the pulp-collecting box 54 is arranged on the underface of the discharging opening of the link slot 53, and the splicing groove 51 is arranged on the casing
The bottom of 31 lateral opening.As shown in Fig. 7 and Fig. 8, the center of the bottom of the splicing groove 51 forms connecting shaft 512, institute
State link slot 53 to be articulated with the splicing groove 51 by the connecting shaft 512, the splicing groove 51 and the side of the casing 31
Opening relative region in face offers a tin ball passage 513, the bottom face of the tin ball passage 513 for one tilt down it is tiltedly flat
Face, angle of inclination is 15 °；Fixture block is formed on the end face that the splicing groove 51 is engaged with the lateral opening of the casing 31
511, the lateral opening end of the casing 31 forms the neck 312 being engaged with the fixture block 511.
As shown in Fig. 9 and Figure 10, by the receiving cylinder 52 and the link slot 53 can adjust tin ball fall into it is described
The speed of pulp-collecting box 54, can be by rising the work of the receiving cylinder 52 when the pulp-collecting box 54 has more receiving space
Stopper rod so that the link slot 53 is tilted to the pulp-collecting box 54, so that tin ball is quickly slipped into the pulp-collecting box 54,
, can be by declining the work of the receiving cylinder 52 when the pulp-collecting box 54 is close to full load, it is necessary to when changing the pulp-collecting box 54
Stopper rod slows down the speed that tin ball falls into the pulp-collecting box 54, uses very convenient.When Fig. 9 rolls for quickening tin ball
Structural representation, Figure 10 is to slow down structural representation when tin ball is rolled.
Operation principle：The vacuum adsorption plate 41 is slid onto using the line slide rail at the top of vacuum adsorption plate 41 and treated
The Xi Qiuqu of detection, the drive cylinder pushes the vacuum adsorption plate 41 so that the vacuum adsorption plate 41 presses close to tin ball, opens
The adsorption function of the vacuum adsorption plate 41 is opened, because the second half ball groove 43 passes through the second through hole 44, connection in the present invention
Pipe 46 is connected with the vacuum adsorption plate 41, therefore, and the second half ball groove 43 can adsorb tin ball to be detected, described
Adsorbed on briquetting 42 after full tin ball, then the vacuum adsorption plate 41 is being slid onto just by the casing 31 by the line slide rail
Top, the vacuum adsorption plate is realized using the locating dowel 411 on the positioning hole and the vacuum adsorption plate on the casing 31
41 with the positioning of the casing 31, then push the vacuum adsorption plate 41 so that the top end face of the support block 32 with it is described
The bottom face of briquetting 42 offsets, now, and the first half ball groove 33 is enclosed jointly with the second half ball groove 43 sets that to form one spherical
Space, tin ball is covered by the diameter of Spherical Volume, is closed after the adsorption function of the vacuum adsorption plate 41 and is carried out table to tin ball
Face roundness measurement, due to the second half ball groove 43 and the first half ball groove 33 enclose set the radius value for the diameter of Spherical Volume to be formed as
The thickness value sum of the radius value of tin ball and first contact chip or second contact chip, if the surface roundness of tin ball meets
It is required that, then it is brought into close contact between the surface of tin ball and first contact chip and second contact chip, if the surface circle of tin ball
Degree it is undesirable, then can be left between the surface of tin ball and first contact chip and second contact chip it is small between
Gap, first contact chip and second contact chip can feed back to the situation of detection described control unit, the control list
Member records the position of unqualified tin ball, after the completion of detection, and the drive cylinder moves up the vacuum adsorption plate 41, and tin ball is certainly
Stayed in the presence of body gravity in the first half ball groove 33, the information that workman provides according to described control unit, by described
The tin ball for not conforming to symbol surface roundness requirement in half ball groove 33, which is chosen to pick, to be come；The tin ball for not meeting surface roundness requirement is picked out
After coming, the vibrating device 20 is opened, while the gas of external air source is passed through into the vent line 36, the gas of external air source again
Body is in charge of 362 after-blow to the first half ball groove 33 by the common air chamber 361 and the ventilation, the first half ball groove 33
The effect simultaneously vibrated and bottom gas of interior qualified tin ball, therefore, tin ball are easy to depart from the first half ball groove 33
And fall into the cell body 37, because the bottom land of the cell body 37 is tilted down, and the cell body 37 and the splicing unit 50
Connection, tin ball slips into the splicing unit 50 along the cell body 37, in the effect of the splicing groove 51 and the link slot 53
Under be slipped into the pulp-collecting box 54.
The embodiment is to the illustrative present invention, not for the limitation present invention.Any those skilled in the art
The embodiment can be modified under the spirit and scope without prejudice to the present invention, therefore the rights protection model of the present invention
Enclose, should be as listed by the claim of the present invention.
Claims (7)
1. a kind of detection means of BGA tin ball surface circularity, it is characterised in that including：
Bottom plate (10)；
It is used for the vibrating device (20) for producing vibration source on the bottom plate (10)；
Base unit (30) on the vibrating device (20), it includes being arranged on the top of the vibrating device (20)
Casing (31) on face, some support blocks (32) being arranged in the casing (31), the top for being molded over the support block (32)
Some the first half ball grooves (33) on end face, the first through hole (34) for being molded over described the first half ball groove (33) bottom, it is arranged on
The first contact blade unit (35) on described the first half ball groove (33) inwall, it is arranged in the support block (32) and is used to connect institute
The vent line (36) of first through hole (34) and external air source is stated, the casing (31) has an accommodating cavity and top end face and side
Face is opening-like, and the support block (32) is vertical and is arranged at equal intervals in the accommodating cavity, between the support block (32)
It is formed with cell body (37), the bottom land of the cell body (37) dips down setting；
The pressing unit (40) on the top end face of the casing (31) is arranged on, it includes the open top with the casing (31)
The vacuum adsorption plate (41) that is engaged, be fixedly installed on the bottom face of the vacuum adsorption plate (41) and with the support block
(32) one-to-one briquetting (42), some the second half ball groove (43), the shapings that are molded on the bottom face of the briquetting (42)
The second through hole (44) at the top of the second half ball groove (43), second on described the second half ball groove (43) inwall connect
Wafer blocks (45), the second half ball groove (43) encloses to set to form one and be used to house tin ball jointly with the first half ball groove (33)
Diameter of Spherical Volume, second through hole (44) is connected by connecting tube (46) with the vacuum adsorption plate (41), the vacuum
The driver element for driving vacuum adsorption plate (41) motion, the driver element bag are installed on the top end face of adsorption plate (41)
Drive cylinder and line slide rail are included, the piston rod of the drive cylinder is connected with the top end face of the vacuum adsorption plate (41), cylinder
Body is arranged on the line slide rail；
Splicing unit (50) on the lateral opening of the casing (31)；
Wherein, the vibrating device (20), the base unit (30), the pressing unit (40) and the splicing unit (50)
It is connected by circuit with control unit；The cell body (37) is connected with the splicing unit (50)；
The vent line (36) includes a common air chamber (361) and some ventilations are in charge of (362), the common air chamber (361)
It is in charge of (362) with the ventilation to be connected；
The longitudinal cross-section of the cell body (37) is in " U " type, and the bottom land angle of inclination of the cell body (37) is 8 °.
2. the detection means of BGA tin ball surface circularity according to claim 1, it is characterised in that：First contact chip
Unit (35) is a pair of first contact chips being symmetricly set in the first half ball groove (33)；The second contact blade unit
(45) a pair of second contact chips to be symmetricly set in the second half ball groove (43)；Wherein, the first contact blade unit
(35) symmetrical plane coincides with the described second symmetrical plane for contacting blade unit (45), the first contact blade unit (35)
Symmetrical plane and the described second symmetrical plane for contacting blade unit (45) be plane by the centre of sphere；First contact chip
It is equal with the size and shape of second contact chip.
3. the detection means of BGA tin ball surface circularity according to claim 2, it is characterised in that：The second half ball groove
(43) radius value for setting the radius value for the diameter of Spherical Volume to be formed as tin ball is enclosed with the first half ball groove (33) to connect with described first
The thickness value sum of contact or second contact chip.
4. the detection means of BGA tin ball surface circularity according to claim 1, it is characterised in that：The casing (31)
Formed on the edge of top end face formed on multiple positioning holes (311), the bottom face of the vacuum adsorption plate (41) with it is described
The corresponding locating dowel (411) of positioning hole (311).
5. the detection means of BGA tin ball surface circularity according to claim 1, it is characterised in that：The splicing unit
(50) include the splicing groove (51) on the lateral opening of the casing (31), be hinged on the bottom of the splicing groove (51)
Link slot (53), the receiving cylinder (52) on bottom plate (10) and pulp-collecting box (54), wherein, the receiving cylinder (52)
Cylinder body be fixedly installed on the bottom plate (10), piston rod is connected with the bottom face of the link slot (53), the pulp-collecting box
(54) underface of the discharging opening of the link slot (53) is arranged on, the splicing groove (51) is arranged on the side of the casing (31)
The bottom of face opening, the center of the bottom of the splicing groove (51) forms connecting shaft (512), and the link slot (53) passes through institute
State connecting shaft (512) to be articulated with the splicing groove (51), the splicing groove (51) and the lateral opening phase of the casing (31)
To region offer a tin ball passage (513), the bottom face of the tin ball passage (513) is a tapered plane tilted down.
6. the detection means of BGA tin ball surface circularity according to claim 5, it is characterised in that：The splicing groove (51)
Fixture block (511), the lateral opening of the casing (31) are formed on the end face being engaged with the lateral opening of the casing (31)
End forms the neck (312) being engaged with the fixture block (511).
7. the detection means of BGA tin ball surface circularity according to claim 5, it is characterised in that：The tin ball passage
(513) angle of inclination of bottom face is 15 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510811093.0A CN105352469B (en) | 2015-11-22 | 2015-11-22 | A kind of detection means of BGA tin ball surface circularity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510811093.0A CN105352469B (en) | 2015-11-22 | 2015-11-22 | A kind of detection means of BGA tin ball surface circularity |
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| CN105352469A CN105352469A (en) | 2016-02-24 |
| CN105352469B true CN105352469B (en) | 2017-10-31 |
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| CN108273746B (en) * | 2016-03-03 | 2020-12-08 | 博兴融智科技创新发展有限公司 | Working method of BGA solder ball screening mechanism |
| CN105598800B (en) * | 2016-03-03 | 2018-11-27 | 泰兴市智谷科技孵化器中心 | A kind of device for grinding of BGA scolding tin ball surface |
| CN105627972B (en) * | 2016-03-08 | 2019-10-18 | 罗春华 | A kind of testing agency of BGA tin ball surface circularity |
| CN110274633B (en) * | 2019-07-18 | 2021-06-15 | 佛山科学技术学院 | Detection apparatus for work piece ball is used |
| CN110369342B (en) * | 2019-07-27 | 2021-05-28 | 湖南大湖生物技术有限公司 | Pearl type screening method for mass production pearl culture |
| CN111570314B (en) * | 2020-05-25 | 2022-01-07 | 浙江迅达工业科技有限公司 | Connecting shaft detection system and detection method thereof |
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| CN204544726U (en) * | 2015-04-23 | 2015-08-12 | 重庆群崴电子材料有限公司 | A kind of BGA tin ball sphere diameter screening machine |
| CN205102815U (en) * | 2015-11-22 | 2016-03-23 | 苏州光韵达光电科技有限公司 | Detection apparatus for BGA tin ball surface circularity |
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