1. An apparatus for detecting a weld height, the apparatus comprising:

the receiving unit is used for receiving an object to be detected, wherein the object is welded with a power component module;

the detection unit is arranged on the receiving unit, and detects the height of the power component module when the object welded with the power component module is positioned on the receiving unit; and

a control unit configured to cause the object having the power component module soldered thereto to exit the receiving unit in response to the detected height being within a preset height range.

2. The apparatus for detecting a welding height according to claim 1, further comprising a display unit connected to the detection unit and the control unit to display the detected height and a result of comparing the detected height with the preset height range.

3. The apparatus for detecting weld height of claim 1, wherein the receiving unit comprises: the two conveying belts are oppositely arranged, and the object welded with the power component module is lapped on the conveying belts.

4. The apparatus of claim 3, wherein the control unit comprises a stop member disposed at an end of the receiving unit to stop the object having the power component module soldered thereon on the receiving unit, wherein the stop member moves downward to move the object having the power component module soldered thereon away from the receiving unit in response to the detected height being within a preset height range.

5. The apparatus for detecting the welding height as set forth in claim 4, wherein the stopper comprises a baffle plate and a cylinder, a piston rod of the cylinder being in contact with the baffle plate to move the baffle plate upward or downward.

6. The apparatus of claim 5, further comprising a first proximity switch and a second proximity switch, wherein the first proximity switch and the second proximity switch are respectively located on both sides of the baffle and between the two conveyor belts, wherein the first proximity switch is configured to sense that the object with the power component module soldered thereon is conveyed to the receiving unit, and the second proximity switch is configured to determine that the object with the power component module soldered thereon leaves the receiving unit.

7. The apparatus for detecting weld height of claim 5, wherein the control unit includes a controller interfacing with the cylinder and the detection unit.

8. The apparatus for detecting a welding height according to claim 1, wherein the detecting unit comprises: and the laser ranging probes are arranged at intervals and are used for detecting the height of the power component module.

9. The device for detecting the welding height as claimed in claim 8, wherein the laser ranging probes are uniformly arranged along the circumferential direction of the power component module.

10. A method for detecting the weld height, characterized in that the detection is performed using the device for detecting the weld height according to any one of claims 1 to 9.

Background

Power components on the circuit board, such as IPM, IGBT, power diode, etc., have particularly high requirements for heat dissipation, and therefore, a large heat sink needs to be mounted for heat dissipation. When in production, the power device is welded on the PCB, and then the PCB is arranged in the electric box. Because the large-scale radiator is fixed on the electrical box in advance, the welding height of the power device needs to be controlled quite accurately when the power device is completely attached to the surface of the radiator during installation. At present, a production line adopts a vernier caliper drawing measurement mode, and 100% controllability cannot be guaranteed.

In order to overcome the defects of the prior art, it is necessary to provide a device and a method for detecting the welding height.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a device for detecting the welding height, which realizes the on-line automatic test of the welding height of a power device module and ensures the test coverage rate.

In a first aspect, the present application provides an apparatus for detecting a welding height, wherein the apparatus for detecting a welding height comprises:

the receiving unit is used for receiving an object to be detected, wherein the object is welded with a power component module;

the detection unit is arranged on the receiving unit, and detects the height of the power component module when the object welded with the power component module is positioned on the receiving unit; and

a control unit configured to cause the object having the power component module soldered thereto to exit the receiving unit in response to the detected height being within a preset height range.

In a possible implementation manner of the first aspect, the system further includes a display unit, which is connected to the detection unit and the control unit, for displaying the detected height and the comparison result between the detected height and the preset height range.

In one possible implementation manner of the first aspect, the receiving unit includes: the two conveying belts are oppositely arranged, and the object welded with the power component module is lapped on the conveying belts.

In one possible embodiment of the first aspect, the control unit includes a stopper provided at an end of the receiving unit to stop the object having the power component module soldered thereon, wherein the stopper moves downward to make the object having the power component module soldered thereon leave the receiving unit in response to the detected height being within a preset height range.

In one possible embodiment of the first aspect, the stopper includes a baffle plate and a cylinder, and a piston rod of the cylinder is in contact with the baffle plate to move the baffle plate upward or downward.

In a possible implementation manner of the first aspect, the first proximity switch and the second proximity switch are further included, where the first proximity switch and the second proximity switch are respectively located on two sides of the baffle and located between the two transport belts, the first proximity switch is used for sensing that the object welded with the power component module is conveyed to the receiving unit, and the second proximity switch is used for determining that the object welded with the power component module leaves the receiving unit.

In one possible embodiment of the first aspect, the control unit comprises a controller interfacing with the cylinder and the detection unit.

In one possible implementation of the first aspect, the detection unit comprises: and the laser ranging probes are arranged at intervals and are used for detecting the height of the power component module.

In one possible implementation manner of the first aspect, the laser ranging probes are uniformly arranged along the circumferential direction of the power component module.

The second aspect also proposes a method for detecting the weld height, wherein the detection is performed using the device for detecting the weld height as described above.

The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic view of an apparatus for detecting weld height of the present invention; and

fig. 2 shows a schematic view of the device for detecting the weld height of the present invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1, the present application provides an apparatus for detecting a welding height, wherein the apparatus for detecting a welding height of the present invention comprises: receiving unit 1, detecting element 2 and the control unit, wherein, receiving unit 1 is used for receiving the object 4 (for example PCB board) of welding power components and parts module 3 (for example IPM, IGBT, power diode etc.) that waits to detect, detecting element 2 sets up on receiving unit 1, wherein, when the object of welding power components and parts module is located receiving unit 1, detecting element 2 can detect the height of power components and parts module, and the height that responds to the detection is located and predetermines the height scope, the control unit constructs to make the object of welding power components and parts module can leave receiving unit 1.

Further, the apparatus for detecting a soldering height of the present invention further includes a display unit 51 connected to the detection unit 2 and the control unit to display the detected height and the comparison result between the detected height and the preset height range, so that an operator can directly observe the soldering height and the comparison result of the power device module.

In one embodiment, the receiving unit 1 includes: two oppositely arranged conveying belts 11 (such as conveying belts) are overlapped on the conveying belts 11 by the object 4 welded with the power component module 3.

In a specific embodiment, the control unit comprises a stop 5, the stop 5 being arranged at an end of the receiving unit 1 such that the object 4 with the power component module 3 soldered thereto rests on the receiving unit 1, wherein, in response to the detected height being within a preset height range, the stop 5 moves downwards such that the object 4 with the power component module 3 soldered thereto leaves the receiving unit 1. In a specific embodiment, the stop 5 comprises a baffle and a cylinder, the piston rod of which is in contact with the baffle to move it up or down. When the object 4 moves onto the receiving unit 1, the piston rod of the cylinder moves outwards (i.e., moves upwards), the piston rod drives the baffle to move, the baffle moves to a position where the height of the baffle is not lower than the bottom surface of the object 4 so as to block the object 4 from continuing to move, and when the detected height of the power component module 3 is within a preset range (i.e., the detected height of the power component module 3 is qualified), the piston rod of the cylinder moves downwards at the moment, and the piston rod drives the baffle to move downwards, so that the object 4 continues to move to leave the receiving unit 1.

Further, the device for detecting the welding height further comprises a first proximity switch 6 and a second proximity switch 7, wherein the first proximity switch 6 and the second proximity switch 7 are respectively located on two sides of the baffle and located between the two conveyor belts 11, the first proximity switch 6 is used for conveying the object welded with the power component module to the receiving unit 1 in an induction mode, and the second proximity switch is used for judging that the object 3 welded with the power component module 2 leaves the receiving unit 1. Specifically, the first proximity switch 6 and the second proximity switch 7 are both photoelectric switches, and are both provided between the two belts. When the distance between the detection value of the first proximity switch 6 and the object 3 is the preset distance L, the first proximity switch 6 senses that the main board is conveyed to the receiving unit 1, and when the distance between the detection value of the second proximity switch 7 and the object 3 is suddenly increased from the preset distance L', the main board falls off from the transportation unit.

In a specific embodiment, the control unit includes a controller 8 (e.g., PLC control), the controller is connected to the cylinder and the detection unit 2, specifically, the detection unit 2 transmits the detected height of the power component module 3 to the controller, when the height of the power component module 3 is determined to be within a preset range, the controller gives an instruction to the cylinder to move downward, and the cylinder moves downward to drive the baffle to move downward, so that the object 4 continues to move to leave the receiving unit 1; when the height of the power component module 3 is judged to be out of the preset range, the controller gives an instruction that the cylinder does not move, the baffle still prevents the object from moving at the moment, and the sound-light alarm reminds staff to pick out the main board for reexamination.

Specifically, the detection unit 2 includes a plurality of laser ranging probes 21 arranged at intervals, and the laser ranging probes 21 are used for detecting the height of the power component module 3. For example, the laser ranging probes 21 are arranged at regular intervals in the circumferential direction of the power component module 3. In an embodiment of the present invention, the detecting unit 2 includes four laser distance measuring probes 21 arranged at intervals, the four laser distance measuring probes 21 are respectively located at four corners of the power component module 3 (i.e. one laser distance measuring probe 21 is arranged on the upper side of each corner of the power component module 3), for example, the laser distance measuring probes are infrared distance measuring sensors and are used for measuring heights of four corners of the power device, so as to prevent the power device from being locally too high and affecting the installation of a heat sink above the power device, or being crushed by the heat sink.

A specific embodiment of the apparatus for detecting a weld level of the present invention will now be described in detail with reference to fig. 1 and 2 for the sake of clarity, which are not intended to limit the invention.

The automatic detection alarm system comprises a set of air cylinder and stop block, two proximity switches, four laser ranging probes and a display and signal processing unit, and realizes automatic detection and judgment alarm reminding through PLC control of a production line. The height of the module after positioning welding is automatically detected through the four laser ranging probes, and signals are converted into numerical values to be visually displayed. The device improves the detection efficiency and the coverage rate, avoids artificial misjudgment and ensures the product quality.

Specifically, the receiving unit 1 includes: two oppositely arranged conveying belts 11 (two oppositely arranged conveying belts at the upper part and the lower part in fig. 1), and two ends of the main board welded with the power component module 3 are lapped on the conveying belts 11. The first proximity switch and the second proximity switch are photoelectric switches and are arranged between the two belts. When the distance between the detection value of the first proximity switch and the mainboard is equal to a preset distance L, the mainboard is sensed, the baffle is in a lifting state initially, the upper surface of the baffle is higher than the lower surface of the mainboard (or the controller controls the control cylinder to move upwards when the mainboard is sensed, the cylinder moves upwards to drive the baffle to move upwards until the upper surface of the baffle is higher than the lower surface of the mainboard), when the mainboard moves along with the conveying belt 11 to be in contact with the baffle, the baffle blocks the mainboard to continue moving, the laser ranging probes are infrared ranging sensors and are used for measuring the heights of four corners of a power device so as to prevent the power device from being locally overhigh and influencing the installation of a radiator above the power device or being crushed by the radiator, when the detected height of the power device module 3 is within a qualified range, the display screen displays the qualification range and outputs a signal to a PLC of a production line, and the controller gives a command for the cylinder to move downwards, the cylinder moves downwards to drive the baffle to move downwards, so that the object 4 continues to move to leave the receiving unit 1, and when the distance between the detection value of the second proximity switch 2 and the object 3 is suddenly increased from the preset distance L', the mainboard is indicated to fall off from the transportation unit; when the height of the power component module 3 is judged to be out of the preset range, the controller gives an instruction that the cylinder does not move, the baffle still prevents the object from moving at the moment, and the sound-light alarm reminds staff to pick out the main board for reexamination.

The method for detecting the welding height by the device for detecting the welding height comprises the following steps:

1. after the PCB mainboard is completed with the welding of the power component module at the welding post, the PCB mainboard is transported to the inspection post through a production line track.

2. The baffle cylinder is in a rising state initially, and the main board is blocked by the baffle and stops advancing after entering.

3. At the moment, the first proximity switch senses a main board signal, and the four laser ranging probes start to detect the height of the surface of the module from the probes.

4. And the display and signal processing unit converts the electric signal into a digital signal and displays the digital signal after receiving the probe signal.

5. And automatically comparing the upper limit value and the lower limit value with the set upper limit value and lower limit value to realize automatic judgment and display qualification or disqualification.

6. And when the detected height of the main board module is within the qualified range, the display screen displays the PLC which is qualified and outputs a signal to the assembly line.

7. After the PLC receives the qualified signal, the stop block falls down to flow out of the main board, and when the main board completely passes through the second proximity switch (also called as an inductive switch), the stop block rises.

8. When the detected height of the main board module exceeds the qualified range, the display screen displays unqualified display and gives an audible and visual alarm to remind staff to pick out the main board for reexamination.

The device for detecting the welding height of the present invention, by having many or all of the above features, can solve the following technical problems:

1. the existing testing mode is manual testing, the method is complicated and has human misjudgment, and the device realizes automatic testing of equipment and is error-proof and foolproof;

2. the device realizes on-line test, does not influence production efficiency, and realizes 100% full coverage test.

The device for detecting the welding height of the present invention, by having many or all of the above features, can achieve the following advantages: the invention realizes the 100% full-coverage test of the welding height of the circuit board power device and improves the test efficiency and the test effectiveness.

The second aspect further provides a method for detecting a welding height, wherein the detection is performed by using the apparatus for detecting a welding height as described above, wherein the apparatus for detecting a welding height is the same as the apparatus for detecting a welding height as described above, and details thereof are omitted.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.