CN204286373U - Pcb board warpage automatic testing equipment - Google Patents

Abstract

The utility model provides an automatic test device for PCB warpage, which is mainly composed of a board feeding unit, a test host and a board receiving unit. The board feeding unit includes a board placement platform to be tested and a board feeding movement mechanism. Placement platform, defective board placement platform and board receiving movement mechanism, the test host includes a marble table test base plate, several laser distance measuring probes, a computer and a display screen. The utility model is used for pre-delivery inspection of PCB finished products, automatically tests the warpage rate of PCB boards with laser, and automatically completes the classification of qualified boards and bad boards, reduces misjudgment by manual testing methods, has high work efficiency, and saves labor costs for enterprises.

Description

PCB warpage automatic test device

technical field

The utility model relates to a test device, in particular to a PCB board warpage automatic test device.

Background technique

With the rapid development of the PCB industry and the surface mount process, the distance between the PCB line and the PAD will become smaller and smaller in the future, and the parts mounted on the surface will be denser. At the same time, the deformation and bending of the PCB itself will affect the mounting process. The impact is also increasing, which is a major problem that hinders the development of placement technology for a long time.

How to solve the problem of PCB board warpage, there is no effective improvement method in the industry at present. Especially in the PCB production process, due to the superposition of many factors, it is difficult to completely avoid PCB warpage. Therefore, while doing a good job in production process control, PCB manufacturers have to conduct warpage tests on products before shipment, and pick out products that meet the customer’s PCB warpage control conditions and provide them to customers. Bad boards are reworked and reworked. deal with.

At present, most PCB manufacturers use manual measurement methods to measure PCB board warpage and separate qualified boards from bad boards. This manual operation is not reliable and inefficient. A small number of companies use three-coordinate measuring machines to measure warpage, which is cumbersome and has a little influence on the measurement results due to direct contact with the tested board.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies in the current products, and provide a new type of PCB board warpage automatic testing device, which can automatically measure the PCB board warpage, and separate qualified boards and bad boards.

The utility model is characterized in that: the device is mainly composed of a board feeding unit, a test host and a board receiving unit installed on the frame in sequence; the board feeding unit includes a board placement platform to be tested and a board-feeding motion mechanism; the board receiving unit includes a qualified board placement platform, a bad board placement platform and a board-receiving motion mechanism; the test host includes a marble table test base plate, several laser distance measuring devices installed above the marble table test base plate Probe, computer and display screen connected to the laser distance measuring probe.

Further, the board placement platform to be tested, the qualified board placement platform and the defective board placement platform are all equipped with photoelectric position sensors, and the position of the platform is raised or lowered in real time according to the stack height of the boards measured by the sensor, so as to ensure that the top position of each platform is The surface of the PCB board is basically flush with the surface of the test bottom plate of the marble table.

Further, the moving mechanism for sending boards and receiving boards is composed of vacuum suction cups, sliders, guide rails and other connected transmission parts.

The utility model is used for pre-shipment inspection of PCB finished products, automatically tests the warpage rate of PCB boards with laser, and automatically completes the classification of qualified boards and bad boards, reduces misjudgment by manual testing methods, has high work efficiency, and saves labor costs for enterprises.

Description of drawings

Figure 1 is a schematic diagram of a PCB warpage automatic testing device.

Detailed ways

In order to describe in detail the structural features, technical means, and achieved goals and effects of the present utility model, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

As shown in Figure 1, a kind of PCB board warpage automatic testing device is mainly composed of a board sending unit 100, a test host 200 and a board receiving unit 300 installed on the rack in sequence; Platform 101 and board feeding movement mechanism 102; the board receiving unit includes a qualified board placement platform 301, a bad board placement platform 302 and a board receiving motion mechanism 303; the test host includes a marble table test base 201, several The laser ranging probe 202 directly above the base plate 201 , the computer connected to the laser ranging probe 202 and the display screen 203 are tested.

The board placement platform 101 to be tested, the qualified board placement platform 301 and the bad board placement platform 302 can all be automatically raised and lowered according to the stacking height of the PCB boards on the platform, relying on the equipped photoelectric position sensor and the left and right lifting screw rods, according to the board stacking height measured by the sensor. The height changes, and the up and down movement of the placement platform is realized by the positive and negative rotation of the screw rod, so as to ensure that the surface of the top PCB board on each platform is basically flush with the surface of the marble table test bottom plate 201.

The plate sending motion mechanism 102 and the plate receiving motion mechanism 303 are composed of vacuum suction cups, slide blocks, guide rails and other connecting transmission parts. The vacuum suction cup is fixedly connected with the slider, and the slider moves on the guide rail. After the vacuum suction cup is in contact with the PCB board and the air valve is opened to suck it, the PCB board is moved to the required placement platform by the movement of the slider, and the air valve is closed. , The PCB board is automatically separated from the vacuum suction cup and placed in the corresponding position.

The laser ranging probe 202 on the test host 200 is aimed at the PCB board placed on the marble table test base 201 to emit laser pulses. After the receiver of the laser ranging probe 202 receives the reflected laser light, it sends out the light pulse to the By returning the time elapsed after being received, the vertical distance from the PCB board surface to the laser ranging probe 202 can be measured, saved and displayed on the computer and the display screen 203 .

The working mode of the utility model is as follows: use the board feeding mechanism 102 to move the board to be tested on the board to be tested placement platform 101 and place it on the marble table top test base 201, and the laser ranging probe 202 automatically measures the specified points on the PCB board surface The vertical distance to the probe, the computer calculates the warpage rate of the PCB board and automatically judges whether the warpage of the PCB board meets the customer's requirements according to the product information, classifies the PCB boards according to the quality, and places them on qualified boards through the receiving board movement mechanism 303 The platform 301 or defective boards are placed on the platform 302, and OK or NG are simultaneously displayed on the computer monitor 203 to remind the operator.

The utility model is used for pre-shipment inspection of PCB finished products, automatically tests the warpage rate of PCB boards with laser, and automatically completes the classification of qualified boards and bad boards, reduces misjudgment by manual testing methods, has high work efficiency, and saves labor costs for enterprises.

The above descriptions are only examples of the present utility model, and are not intended to limit the patent scope of the present utility model. All the transformations of structures, materials and uses made by utilizing the contents of the utility model and accompanying drawings are all included in the scope of patent protection of the utility model in the same way.

Claims (5)

1. The automatic test device for PCB board warpage is characterized in that: it is composed of a board feeding unit, a test host and a board receiving unit installed on the frame in sequence; the board feeding unit includes a board placement platform to be tested and a board feeding motion mechanism ; The board collection unit includes a qualified board placement platform, a bad board placement platform, and a board collection movement mechanism; the test host includes a marble table test base plate, several laser distance measuring probes installed above the marble table test base plate, connected to the laser measuring computer and display screen from the probe. 2 . The PCB warpage automatic testing device according to claim 1 , wherein the platform for placing the board to be tested, the platform for placing qualified boards and the platform for placing defective boards are all equipped with photoelectric position sensors. 3 . 3. The PCB board warpage automatic testing device as claimed in claim 1, characterized in that: said board feeding motion mechanism comprises a vacuum suction cup, a slide block, and a guide rail, the vacuum suction cup is fixedly connected with the slide block, and the slide block moves on the guide rail . 4. The PCB board warpage automatic testing device as claimed in claim 1, characterized in that: the board receiving motion mechanism comprises a vacuum suction cup, a slide block, and a guide rail, the vacuum suction cup is fixedly connected with the slide block, and the slide block moves on the guide rail . 5. The PCB board warpage automatic testing device as claimed in claim 2, characterized in that: the board placement platform to be tested, the qualified board placement platform and the defective board placement platform are all moved up and down by the positive and negative rotation of the screw rod .