CN101339441A - Tip-off thermostatic control device and its control method - Google Patents

Tip-off thermostatic control device and its control method Download PDF

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Publication number
CN101339441A
CN101339441A CNA200710028944XA CN200710028944A CN101339441A CN 101339441 A CN101339441 A CN 101339441A CN A200710028944X A CNA200710028944X A CN A200710028944XA CN 200710028944 A CN200710028944 A CN 200710028944A CN 101339441 A CN101339441 A CN 101339441A
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China
Prior art keywords
electronic component
unit
temperature
heating
circuit board
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Pending
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CNA200710028944XA
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Chinese (zh)
Inventor
林嘉庆
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Mitac Precision Technology Shunde Ltd
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Mitac Precision Technology Shunde Ltd
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Priority to CNA200710028944XA priority Critical patent/CN101339441A/en
Publication of CN101339441A publication Critical patent/CN101339441A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an unsolder thermostatic control apparatus and a control method thereof, wherein the distance between a heating unit and an electronic element is automatically adjusted through measuring the heating temperature of the electronic element, to maintain the temperature of the electronic element as a constant value, and the unsoldered electronic element is automatically removed through a detaching apparatus, which prevents the electronic element from burning due to overhigh temperature when being unsoldering. According to the invention, the distance between the heating unit and the electronic element is automatically adjusted, thereby controlling the temperature for heating the electronic element, causing the electronic element in a specified temperature, and causing the solder of the electronic element and a circuit plate to melt without burning out the electronic element, thereby avoiding electronic element from burning out due to the overhigh temperature. In addition, the unsoldered electronic element can be automatically removed from the circuit plate through the detaching unit, thereby saving the manpower.

Description

Tip-off thermostatically-controlled equipment and control method thereof
Technical field
The present invention relates to a kind of heating unit and its control method, particularly in order to measuring the heating-up temperature of electronic component, and adjust the distance of heating unit and electronic component automatically, is the control device and the control method thereof of definite value with the temperature of keeping electronic component.
Background technology
The industry welding technology of separating commonly used is directly electronic component and tin ball pin to be blown weldering by the engineering staff to separate welding gun at present, WU ball with fusing electronic component pin position and circuit board connects face, and reach the purpose of tip-off, and this utilizes the manpower gripping to separate welding gun blows weldering facing to electronic component mode, usually because can't grasp the heating-up temperature of electronic component, and cause burning of electronic component, especially with the electronic component of BGA or FBGA packaged type, its tip-off temperature can reach the purpose of tip-off up to 300 degree Celsius to 1000 degree, if, very easily electronic component is burnt by artificially controlling the control that temperature also can't reach constant temperature.
Summary of the invention
In view of above problem, fundamental purpose of the present invention is to provide a kind of tip-off thermostatically-controlled equipment and control method thereof, it is by measuring the heating-up temperature of electronic component, and adjusts the distance of heating unit and electronic component automatically, is definite value and melting scolder to keep temperature of electronic component.
Therefore, for reaching above-mentioned purpose, the disclosed a kind of tip-off thermostatically-controlled equipment of the present invention, it comprises:
Body, it provides an accommodation space, and establishes a shallow storage space in order to the bearer circuit plate in this body place, and this described circuit board surface is welded with a plurality of electronic components; Displacement unit, it is installed on accommodation space, and this displacement unit moves relative to body; Heating unit, it is linked to displacement unit, and this heating unit generation hot blast, and utilizes this hot blast to add thermoelectric elements; Sensing cell, it is fixed in heating unit, measures temperature of electronic component, to produce temperature signal; And control module, it is fixed in accommodation space, accepts temperature signal with the moving of control displacement unit, and drives heating unit, makes the scolder melting with the heating-up temperature of keeping electronic component.
Wherein, more comprise a grip unit, this grip unit is connected in body, and places the shallow storage space of body, and the relative heating unit of this grip unit is with the clamping circuit board, and it comprises: platform, and it is in order to the bearer circuit plate; And a plurality of grip blocks, it is bolted in platform, is pressed in order to circuit board is produced a pressure on the platform and fixes.
More comprise one and remove the unit, this removes the unit clamping and electronic component, accept the signal that removes of control module when removing the unit, this removes the just relative body in unit and produces perpendicular displacement and drive electronic component, to be located away from circuit board, and it comprises: motor, this motor be for being fixed in body, and in the rotation axle head connection gear of this motor; Tooth bar, it is meshed with gear, and drives tooth bar via swing pinion and slide on body to produce perpendicular displacement; Connecting link, it is connected and interlock with tooth bar; And clip, it is connected with connecting link, and this clip is in order to the clamping electronic component.
More comprise a distance sensing unit, it is fixed in heating unit, measuring the distance of heating unit and electronic component, and producing distance signal and to be sent to control module, and the compensation temperature signal, and the required displacement in confession control module displacement calculating unit.
More comprise a display unit, this display unit is for being fixed in body, and this display unit is for accepting the shows signal display lamp number of control module.
Above-mentioned displacement unit comprises: motor, and it is for being fixed in body, and in the rotation axle head connection gear of motor; Tooth bar, it is meshed with gear, and drives tooth bar via swing pinion and slide on body to produce perpendicular displacement; And connecting link, it is connected and interlock with tooth bar, and heating unit is fixed in connecting link.
A kind of control method of tip-off thermostatically-controlled equipment, it comprises: fixing circuit board, and this circuit board is welded with electronic component; Then adding the distance of thermoelectric elements and adjustment heating unit and electronic component, is certain value with the heating-up temperature that keeps electronic component; Continue the melt solder of heating until electronic component.
The distance that wherein adds thermoelectric elements and adjustment heating unit and electronic component is a definite value with the heating-up temperature that keeps electronic component, comprises the following step:
Heating unit produces hot blast and electronic component is heated; And monitoring temperature of electronic component;
Next compare temperature of electronic component definite value therewith, to produce difference value; Adjust the distance of heating unit and electronic component according to difference value, to keep temperature of electronic component.
Wherein continue the melt solder of heating, comprise the following step until electronic component:
When arriving definite value, the heating-up temperature of electronic component picks up counting; If display lamp number after the value that the arrival of the time of this timing is preset.
After more comprising the melt solder of electronic component,, comprise the following step from the circuit board separating electronic components:
When arriving definite value, the heating-up temperature of electronic component picks up counting; And after time of timing arrives default value, remove unit clamping electronic component, to remove electronic component from circuit board.
Than prior art, can adjust the distance of heating unit and electronic component automatically by the present invention, thereby control calorifies temperature of electronic component, make electronic component can keep a specified temp, the scolding tin of electronic component and circuit board is melted, electronic component can not burnt again, electronic component Yin Wendu is too high and the situation of burning takes place when avoiding high temperature; In addition, can be automatically the electronic component of tip-off be removed from circuit board, saved manpower by the unit that removes of the present invention.
Description of drawings
Figure 1A is one of structural drawing of the present invention;
Figure 1B is two of a structural drawing of the present invention;
Fig. 2 is the structural drawing of another embodiment of the present invention;
Fig. 3 is a control flow chart of the present invention;
Fig. 4 is the control flow chart of another enforcement of the present invention;
Fig. 5 adds thermoelectric elements for the present invention and adjusts the distance of heating unit and electronic component, is the control flow chart of definite value with the heating-up temperature that keeps electronic component.
Embodiment
See also Figure 1A, be depicted as structural drawing of the present invention, a kind of tip-off thermostatically-controlled equipment comprises: body 110 provides the accommodation space (not shown), and is provided with between emptying 111 in this body 110 is other; Displacement unit 120 is installed in the accommodation space, comprises motor 121, is the accommodation space that is fixed in body 110, and in the rotation axle head connection gear 122 of motor 121 to drive other assembly; Tooth bar 123 is to be meshed with said gear 122, and drives tooth bar 123 via swing pinion 122 and slide on body 110 to produce perpendicular displacement; And connecting link 124, it is to be connected with tooth bar 123, and interlock, so that perpendicular displacement to be provided.
Circuit board 130 its surfaces are welded with a plurality of electronic components 131, general circuit plate surface is welded with a plurality of electronic components, and as detecting the circuit board of usefulness, the electronic component on surface needs usually to change, especially utilize the electronic component of BGA or FBGA encapsulation directly to be welded on the circuit board, can detect.
Heating unit 140, this heating unit 140 is fixed in the connecting link 124 of displacement unit 120, and it utilizes the high-temperature hot-air mode to add thermoelectric elements 131, can reach this effectiveness as hot wind generating device, and is general common as separate product such as welding gun.
Sensing cell 150, it is for being fixed in heating unit 140, in order to measure the temperature of electronic component 131, and generation temperature signal, because the mode of BGA and FBGA encapsulation, if want to remove its welded condition, its temperature often must be up to more than 1000 degree Celsius, therefore, sensing cell 150 can be suitable for more than must be able to measuring more than 1000 degree Celsius, and therefore, general industrial can be suitable for temperature sensor, this sensing cell 150 can design according to the required temperature of tip-off, and which kind of temperature sensor present embodiment does not limit.
Distance sensing unit 160, it is for being fixed in heating unit 140, in order to measure the distance of heating unit 140 and electronic component 131, to produce distance signal in order to the compensation temperature signal, because sensing cell 150 is spaced a distance each other with electronic component 131, the temperature signal that produces so sensing cell 150 measures not is the actual temperature that is entirely electronic component 131, so utilize this distance sensing unit 160 according to the distance of sensing cell 150, add this temperature signal so that a compensation temperature to be provided with electronic component 131.
Control module 170, it is the accommodation space that is fixed in body 110, accept the temperature signal of sensing cell 150, and the temperature signal decided at the higher level but not officially announced with control module 170, the distance signal of collocation distance sensing unit 160, make the required displacement in control module 170 displacement calculating unit 120, with moving of control displacement unit 120, so displacement unit 120 drives heating unit 140 again, make heating unit 140 can near or away from electronic component 131, can keep fixing to reach the temperature that calorifies electronic component 131, the segment distance because heating unit 140 and electronic component 131 are separated by, therefore, control module 170 must utilize this distance signal and calculate the temperature that need to move how many distances and can promote electronic component 131, also or reduce the temperature of electronic component 131.
In addition, see also Figure 1B, cause the difficulty of controlling temperature for preventing circuit board 130 moving when heating, usually must be fixed circuit board 130, therefore utilize grip unit 180 to reach, this grip unit 180 is connected in the shallow storage space 111 of body 110, and relative heating unit 140, and this grip unit 180 comprises in order to clamping circuit board 130:
Platform 181, but these platform 181 bearer circuit plates 130, and a plurality of grip blocks 182, utilize hand-holdable bolt that grip block 182 is locked on the platform 181, if when desiring clamping circuit board 130, make 182 pairs of circuit boards of grip block 130 produce pressure and be pressed on platform 181 and fix to screw bolt, when desiring to remove this circuit board 130, promptly loosen this bolt and can take away circuit board 130.
Can be removed in order to allow the user understand electronic component 131, therefore utilize display unit 190 to allow the user can carry out removing of electronic component 131, this display unit 190 is to be fixed in body 110, and display unit 190 is to accept the shows signal of control module 170 and display lamp number, make the people can understand electronic component 131 and can be removed, and then utilize the manual electronic component 131 that removes.
See also Fig. 2, be depicted as the structural drawing of another embodiment of the present invention, comprise: body 110, it provides accommodation space; Displacement unit 120, it is installed in the accommodation space, and comprises motor 121, this motor 121 is for being fixed in the accommodation space of body 110, and in the rotation axle head connection gear 122 of motor 121 to drive other assembly; Tooth bar 123, it is meshed with said gear 122, and drives tooth bar 123 via swing pinion 122 and slide on body 110 to produce perpendicular displacement; And connecting link 124, it is connected with tooth bar 123, and interlock, in order to perpendicular displacement to be provided.
Circuit board 130 its surfaces are welded with a plurality of electronic components 131, general circuit plate surface is welded with a plurality of electronic components, as detect the circuit board of usefulness, its surperficial electronic component needs usually to change, especially utilize the electronic component of BGA or FBGA encapsulation directly to be welded on the circuit board, can detect.
Heating unit 140, this heating unit 140 utilizes the high-temperature hot-air mode to add thermoelectric elements 131 for being fixed in the connecting link 124 of displacement unit 120, can reach this effectiveness as hot wind generating device, and is general common as separate product such as welding gun.
Sensing cell 150, it is for being fixed in heating unit 140, in order to measure the temperature of electronic component 131, and generation temperature signal, because the mode of BGA and FBGA encapsulation, desire is removed its welded condition, its temperature often must be up to more than 1,000 degree, therefore, sensing cell 150 must be able to measure more than 1,000 and can be suitable for more than the degree, and therefore, often general industrial can be suitable for temperature sensor, this sensing cell 150 can design according to the required temperature of tip-off, and which kind of temperature sensor present embodiment does not limit.
Distance sensing unit 160, it is for being fixed in heating unit 140, measure the distance of heating unit 140 and electronic component 131, to produce distance signal in order to the compensation temperature signal, because sensing cell 150 is spaced a distance each other with electronic component 131, the temperature signal that produces so sensing cell 150 measures not is the actual temperature that is entirely electronic component 131, so utilize this distance sensing unit 160 according to the distance of sensing cell 150, add this temperature signal so that a compensation temperature to be provided with electronic component 131.
Control module 170, it is the accommodation space that is fixed in body 110, accept the temperature signal of sensing cell 150 and the distance signal of distance sensing unit 160, and compare with temperature signal and distance signal that control module 170 is decided at the higher level but not officially announced, with moving of control displacement unit 120, so displacement unit 120 drives heating unit 140 again, make heating unit 140 can near or away from electronic component 131, can keep fixing to reach the temperature that calorifies electronic component 131, the segment distance because heating unit 140 and electronic component 131 are separated by, therefore, control module 170 must utilize this distance signal and calculate the temperature that need to move how many distances and can promote electronic component 131, also or reduce the temperature of electronic component 131.
In addition, cause the difficulty of controlling temperature for preventing circuit board 130 moving when heating, usually must be fixed circuit board 130, therefore utilize grip unit 180 to reach, this grip unit 180 is connected in body 110, and relative heating unit 140, and this grip unit 180 comprises in order to clamping circuit board 130:
Platform 181, but these platform 181 bearer circuit plates 130, and a plurality of grip blocks 182, utilize hand-holdable bolt that grip block 182 is locked on the platform 181, if when desiring clamping circuit board 130, make 182 pairs of circuit boards of grip block 130 produce pressure and be pressed on platform 181 and fix to screw bolt, when desiring to remove this circuit board 130, promptly loosen this bolt and can take away circuit board 130.
So can increase by one and remove mechanism automatically improving surcharge of the present invention, therefore can utilize to remove unit 200 and reach, comprise:
Motor 201 is the accommodation spaces that are fixed in body 110, and in the rotation axle head connection gear 202 of motor 201 to drive other assembly; Tooth bar 203 is to be meshed with said gear 202, and drives tooth bar 203 via swing pinion 202 and slide on body 110 to produce perpendicular displacement; Connecting link 204 is to be connected and interlock with tooth bar 203, so that perpendicular displacement to be provided; And clip 205, be to be connected with connecting link 204, but these clip 205 clamp assemblies, therefore utilize clip 205 clampings electronic component 131, when remove unit 200 accept control module 170 remove signal the time, the turning axle of motor 201 rotates and gear 202 is rotated, so drive tooth bar 203 and produce perpendicular displacement, and drive connecting link 204 and clip 205, therefore, clip 205 drives electronic component 131, to be located away from circuit board 130, so can automatically electronic component 131 be removed in circuit board 130.
See also Fig. 3, be depicted as control flow chart of the present invention, a kind of control method of tip-off thermostatically-controlled equipment comprises:
Utilize grip unit fixedly to comprise the circuit board (step 300) of a plurality of electronic components earlier, then provide heat with the hot blast of heating unit, with to electronic component heating (step 301) facing to the electronic component of circuit board; Next control module receives temperature signal and the distance signal that is transmitted by sensing cell and distance sensing unit, with monitoring temperature of electronic component (step 302); Control module is to utilize temperature signal and distance signal to adjust the distance of heating unit and electronic component to calculate temperature of electronic component, to keep temperature of electronic component (step 303); Control module can write down keep temperature of electronic component sometime after, display unit produces cresset (step 304), makes the user electronic component can be removed from circuit board.
See also Fig. 4, be depicted as the control flow chart of another enforcement of the present invention, comprise:
Utilize grip unit with the circuit board that fixedly comprises a plurality of electronic components (step 300 ') earlier, then provide heat with the hot blast of heating unit, with to electronic component heating (step 301 ') facing to the electronic component of circuit board; Next control module receives temperature signal and the distance signal that is transmitted by sensing cell and distance sensing unit, to monitor temperature of electronic component (step 302 '); Control module is to utilize temperature signal and distance signal to adjust the distance of heating unit and electronic component to calculate temperature of electronic component, to keep temperature of electronic component (step 303 '); Control module can write down keep temperature of electronic component sometime after, can utilize to remove the unit electronic component is located away from circuit board (step 305).
See also Fig. 5, be depicted as the distance that adds thermoelectric elements and adjust heating unit and electronic component, heating-up temperature with the maintenance electronic component is the control flow chart of definite value, the distance that wherein adds thermoelectric elements and adjustment heating unit and electronic component, heating-up temperature with the maintenance electronic component is a definite value, is to comprise the following step:
Utilize heating unit generation hot blast and electronic component is heated (step 400); Next monitor temperature of electronic component (step 401); Then compare temperature of electronic component and definite value to produce a difference value (step 402); Last difference value according to this and adjust the distance of heating unit and electronic component is a definite value (step 403) with the heating-up temperature of keeping electronic component.
In this invention, according to the advantage that previous described different embodiment had, comprise:
1. when tip-off, prevent burning of electronic component;
Utilize the distance of automatic adjustment heating unit of the present invention and electronic component, calorify temperature of electronic component with control, so that electronic component can be kept a specified temp, the scolding tin of electronic component and circuit board is melted, but electronic component can not burnt again, the electronic component that is particularly useful for BGA and FBGA encapsulation, because the electronic component of BGA and FBGA encapsulation is to utilize the tin ball and be welded on the circuit board, desire often may be from 300 degree Celsius to 1000 scopes of spending with its temperature of its tip-off, high temperature like this, careless slightly, electronic component just Yin Wendu is too high and burn, if utilize thermostatically-controlled equipment of the present invention can avoid the generation of this situation.
2. remove electronic component automatically to reach the robotization purpose.
The present invention can arrange in pairs or groups remove the unit with automatically will be the electronic component of tip-off remove from circuit board, after electronic component is heated to a certain temperature and keeps a period of time, scolding tin melts fully and is removable, so, the present invention arranges in pairs or groups and removes the unit and can automatically removable electronic component be removed from circuit board, in the time of can waiting for that removable pilot lamp lights without waste of manpower, remove electronic component again.
Though the present invention discloses as above with aforesaid preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of alike skill person; without departing from the spirit and scope of the invention; when can doing a little change and retouching, therefore scope of patent protection of the present invention must be looked the appended claim person of defining of this instructions and is as the criterion.

Claims (12)

1. a tip-off thermostatically-controlled equipment is characterized in that, comprises:
One body provides an accommodation space, and establishes a shallow storage space to carry a circuit board in this body, and this circuit board surface is welded with a plurality of electronic components;
One displacement unit, it is installed on described accommodation space, and this displacement unit moves relative to this body;
One produces the heating unit of hot blast, and it is linked to described displacement unit, and adds thermoelectric elements by hot blast;
One measures the electronic component temperature and produces the sensing cell of a temperature signal, and it is for being fixed in described heating unit; And
One control module, it is fixed in described accommodation space, and this displacement unit is to be moved to control to accept this temperature signal, and drives this heating unit, makes melt solder with the heating-up temperature of keeping this electronic component.
2. tip-off thermostatically-controlled equipment as claimed in claim 1 is characterized in that, more comprises a grip unit, and this grip unit is connected in body, and places shallow storage space, and described relatively heating unit is with the clamping circuit board; This grip unit comprises:
One platform, this circuit board of this platform bearer; And
A plurality of grip blocks, it presses solidly in described platform so that circuit board is produced a pressure for being bolted in described platform.
3. tip-off thermostatically-controlled equipment as claimed in claim 1, it is characterized in that, more comprise one and remove the unit, this removes this electronic component of unit clamping, this removes the unit and accepts one of this control module and remove signal, this removes the unit and produces perpendicular displacement and drive this electronic component, to be located away from this circuit board; This described unit that removes comprises:
One motor, it is for being fixed in described body, and connects a gear in the rotation axle head of this motor;
One tooth bar, it is meshed with described gear, and drives this tooth bar via this gear of rotation and slide on described body to produce perpendicular displacement;
One connecting link, it is connected and interlock with described tooth bar; And
One clip, it is connected with described connecting link, the described electronic component of this clip clamping.
4. tip-off thermostatically-controlled equipment as claimed in claim 1, it is characterized in that, more comprise a distance sensing unit, be fixed in this heating unit, measure the distance of this heating unit and this electronic component, producing a distance signal and to be sent to this control module, and compensate this temperature signal, and this control module is accepted this distance signal to calculate the required displacement of this displacement unit.
5. tip-off thermostatically-controlled equipment as claimed in claim 1 is characterized in that, more comprises a display unit, and this display unit is for being fixed in described body, and this display unit is accepted the shows signal of described control module and shown a cresset.
6. tip-off thermostatically-controlled equipment as claimed in claim 1 is characterized in that, described displacement unit comprises:
One motor, it is for being fixed in described body, and connects a gear in the rotation axle head of motor;
One tooth bar, it is meshed with described gear, and drives tooth bar via the described gear of rotation and slide on described body to produce perpendicular displacement; And
One connecting link, it is connected and interlock with described tooth bar, and described heating unit is for being fixed in this connecting link.
7. weldering thermostatically-controlled equipment as claimed in claim 1 is characterized in that, described heating unit is a hot wind generating device.
8. the control method of a tip-off thermostatically-controlled equipment is characterized in that, comprises:
Fix a circuit board, this circuit board is welded with an electronic component;
Heating this electronic component and adjust the distance of a heating unit and this electronic component, is certain value with the heating-up temperature that keeps this electronic component; And
Continue the melt solder of heating until this electronic component.
9. the control method of tip-off thermostatically-controlled equipment as claimed in claim 8, it is characterized in that, heating this electronic component and adjust the distance of a heating unit and this electronic component, is the step of certain value with the heating-up temperature that keeps this electronic component, comprises the following step:
This heating unit produces hot blast and this electronic component is heated;
Monitor this temperature of electronic component;
Relatively this temperature of electronic component and this definite value are to produce a difference value; And
Adjusting the distance of this heating unit and this electronic component according to this difference value, is this definite value to keep this temperature of electronic component.
10. the control method of tip-off thermostatically-controlled equipment as claimed in claim 8 is characterized in that, continues the step of heating until the melt solder of this electronic component, is to comprise the following step:
When arriving this definite value, the heating-up temperature of this electronic component picks up counting; And
Display lamp number after the value that the time arrival of this timing is preset.
11. the control method of tip-off thermostatically-controlled equipment as claimed in claim 8 is characterized in that, continues heating after the step of the melt solder of this electronic component, more comprises the step of separating this electronic component from this circuit board.
12. the control method of tip-off thermostatically-controlled equipment as claimed in claim 11 is characterized in that, to separate the step of this electronic component be for removing unit clamping electronic component with one to this circuit board certainly, and remove the step of this electronic component from this circuit board.
CNA200710028944XA 2007-07-02 2007-07-02 Tip-off thermostatic control device and its control method Pending CN101339441A (en)

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CNA200710028944XA CN101339441A (en) 2007-07-02 2007-07-02 Tip-off thermostatic control device and its control method

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Application Number Priority Date Filing Date Title
CNA200710028944XA CN101339441A (en) 2007-07-02 2007-07-02 Tip-off thermostatic control device and its control method

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CN101339441A true CN101339441A (en) 2009-01-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101815415B (en) * 2009-02-20 2012-02-01 和硕联合科技股份有限公司 Foot pad adjustment module and foot pad adjustment method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101815415B (en) * 2009-02-20 2012-02-01 和硕联合科技股份有限公司 Foot pad adjustment module and foot pad adjustment method

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Open date: 20090107