CN110672242A - A device and method for testing the assembly performance of solenoid valve pins and circuit boards - Google Patents

Abstract

The invention discloses a device and method for testing the assembly performance of a solenoid valve coil pin and a circuit board. The testing device includes an electronic servo press provided with a force sensor, a displacement sensor, a computer computing unit, and a solenoid valve coil pin insertion force. Test tooling, the solenoid valve coil pin insertion force testing tooling includes, from top to bottom, a press indenter contact block, a PCB test board pressing block, and a T-shaped step block. The test method includes the steps of: measuring the load of the test tooling system; measuring the pressing force of the solenoid valve coil pin; measuring the pulling force of the solenoid valve coil pin; , respectively, to obtain the actual press-fit force and pull-out force. The invention has simple structure, low cost, convenient operation, can accurately measure the insertion and extraction force of the solenoid valve coil pin, and can provide reference original input parameters for subsequent assembly of the solenoid valve coil pin and the PCB circuit board, thereby improving the development efficiency of the solenoid valve.

Description

A device and method for testing the assembly performance of solenoid valve pins and circuit boards

technical field

The invention relates to a solenoid valve testing technology, in particular to a device and a method for testing the assembly performance of a solenoid valve coil pin and a circuit board.

Background technique

The solenoid valve is the executive element of the electronic control system, which mainly controls the on-off of the hydraulic circuit through the action of the solenoid valve spool and the valve port. The solenoid valve plays an accurate role in controlling the pressure change of the hydraulic system in the hydraulic control circuit and realizes the precise pressure control of the hydraulic system. The control signal sent by the electronic control unit of the hydraulic system is converted into an electrical signal through the PCB circuit board to control the opening and closing of the valve port of the solenoid valve, thereby controlling the pressure. Therefore, the solenoid valve is the key conversion part of the electro-hydraulic system.

The solenoid valve is an important part of the automobile integrated electro-hydraulic braking system. Due to the high degree of system integration, the solenoid valve coil needs to be directly assembled with the PCB circuit board, that is, the solenoid valve coil pin is pressed into the corresponding mounting hole of the PCB circuit board. In order to ensure that the solenoid valve coil pin and the PCB circuit board are firmly assembled, it is necessary to test the insertion force of the solenoid valve coil pin and the PCB circuit board, and provide the reference pressure input parameters for the solenoid valve coil pin and the PCB board assembly.

SUMMARY OF THE INVENTION

In view of one of the above technical problems, the present invention aims to design a test device that can measure the press-fit force and the pull-out force when the solenoid valve coil pin is assembled with the PCB circuit board. The test device is simple in structure and easy to operate, can accurately measure the insertion and extraction force, and can provide original input parameters for the solenoid valve and circuit board assembly production line.

The object of the present invention is realized by at least one of the following technical solutions:

A solenoid valve coil pin and circuit board assembly performance testing device, comprising an electronic servo press provided with a force sensor, a displacement sensor, and a computer computing unit, and a solenoid valve coil pin placed on a working platform of the electronic servo press Insertion force test tool, the solenoid valve coil pin insertion force test tool from top to bottom includes:

The press indenter contact block is located just below the output end of the electronic servo press, transmits the pressure output by the electronic servo press, and is provided with a PCB test board positioning groove at the bottom;

The PCB test board pressing block is located directly below the press indenter contact block, and the edge is provided with a solenoid valve coil pin limit groove opposite to the PCB test board positioning groove up and down through the edge;

The T-shaped step block includes a middle boss located directly below the PCB test board pressing block, a low-level step and a high-level step located on both sides of the middle boss, and the middle boss faces one side of the low-level step A solenoid valve coil pin limit slot limit mechanism is provided.

Further, the bottom of the press head contact block is provided with a PCB test board positioning groove opposite to the solenoid valve coil pin limit slot; the solenoid valve coil pin limit slot includes parallel to the vertical direction. Two square holes are provided; the top edge of the middle boss is provided with a circular arc concave platform opposite to the two square holes.

Further, two cylindrical guide rods are vertically and parallelly fixed at the bottom of the press head contact block, and the middle bosses of the PCB test board pressing block and the T-shaped step block are coaxially provided with all the guide rods. The two cylindrical guide rods are slidably matched with circular guide holes; the side of the PCB test board pressing block opposite to the middle boss is provided with two cylindrical bosses that are coaxial with the guiding circular holes on the PCB test board pressing block and the circular holes on both sides of the guiding circular hole of the central boss are coaxially arranged with the cylindrical boss in clearance fit.

Further, a spring mounting hole is also provided between the circular holes on both sides, and a return spring abutting against the PCB test board pressing block is provided in the spring mounting hole.

Further, a circular hole is provided on the high-level step, a coil positioning pin is vertically fixed in the circular hole, and the upper end of the coil positioning pin is provided with a certain draft angle.

Further, the limit mechanism of the solenoid valve coil pin limit groove includes:

a square groove, vertically arranged on the side of the middle boss facing the lower step, for placing the solenoid valve coil pin;

a square hole, extending laterally into the middle boss and intersecting with the square groove;

The coil pin limit plunger is inserted into the square hole, and cooperates with the square groove to perform a fixed limit during the pullout force test of the solenoid valve coil pin.

A method for measuring the assembly performance of a solenoid valve coil pin and a circuit board using the device, comprising the steps of:

Measure test fixture system load;

Measure the pressing force between the solenoid valve coil pin and the PCB test board;

Measure the pull-out force between the solenoid valve coil pin and the PCB test board;

According to the obtained press-fit force and pull-out force and the no-load press-fit force of the system, the actual press-fit force and pull-out force of the solenoid valve coil pin and the PCB test board are obtained respectively.

Further, the step of measuring and testing the load of the tooling system specifically includes:

When the solenoid valve coil is not installed, the set pressure is applied to the contact block of the press head through the indenter of the electronic servo press to complete the load test of the system, and the system load pressing force is recorded at this time.

Further, the step of measuring the pressing force of the solenoid valve coil pin and the PCB test board specifically includes:

Install the solenoid valve coil on the coil positioning pin, and place the solenoid valve coil pin in the limit slot of the solenoid valve coil pin for positioning;

Next, place the PCB test board between the press indenter contact block and the PCB test board press block and above the solenoid valve coil pins, and then press the PCB test board press block and the press indenter contact block. PCB test board;

Start the electronic servo press, apply the set pressure to the contact block of the press head, push the PCB test board to press the solenoid valve coil pin, and record the press-fitting force of the test device at this time.

Further, the step of measuring the pull-out force of the solenoid valve coil pin and the PCB test board specifically includes:

Install the solenoid valve coil on the lower step of the T-shaped step block, place the PCB test board between the PCB test board pressing block and the middle boss, and insert the coil pin limit plunger to press-fit the solenoid valve coil. The pins are fixed at the limit, and then the solenoid valve coil pins and the PCB test board are pressed by the PCB test board pressing block and the press indenter contact block;

Start the electronic servo press, apply the set pressure to the contact block of the press head, push the solenoid valve coil pin to separate from the PCB test board, and record the pull-out force of the test device at this time.

Compared with the prior art, the beneficial effects of the present invention are:

The invention can accurately measure the assembly performance of the solenoid valve coil pin and the PCB circuit board, provides original input parameters for the assembly production line of the solenoid valve coil pin and the circuit board, and has a simple structure. Easy to operate and low cost.

Description of drawings

FIG. 1 is an assembly diagram of a device for testing the assembly performance of solenoid valve coil pins and a circuit board according to the present invention.

FIG. 2 is a no-load diagram of the device for testing the assembly performance of the solenoid valve coil pin and the circuit board according to the present invention.

FIG. 3( a ) is a schematic front view of the coil pin and the PCB test board not being press-fitted when the present invention is press-fitted.

FIG. 3(b) is a schematic cross-sectional view of the coil pin and the PCB test board without being press-fitted when the present invention is press-fitted.

FIG. 4( a ) is a schematic front view of the coil pin and the PCB test board being press-fitted when the present invention is press-fitted.

Fig. 4(b) is a schematic cross-sectional view of the coil pin and the PCB test board having been press-fitted during the press-fit of the present invention.

FIG. 5( a ) is a schematic front view of the coil pin and the PCB test board not being pulled out when the present invention is pulled out.

5(b) is a schematic cross-sectional view of the coil pin and the PCB test board not being pulled out when the present invention is pulled out.

FIG. 6( a ) is a schematic front view of the coil pin and the PCB test board having been pulled out when the present invention is pulled out.

6(b) is a schematic cross-sectional view of the coil pin and the PCB test board being pulled out when the present invention is pulled out.

FIG. 7 is a block diagram of a T-shaped ladder of the testing device of the present invention.

FIG. 8 is a block diagram of a PCB test board pressing block of the test device of the present invention.

FIG. 9 is a flowchart showing the steps of the testing method of the testing device of the present invention.

As shown in the picture: 1-Electronic servo press; 2-T-type step block; 21-Lower step; 22-High step; 23-Spring mounting hole; 24-Round holes on both sides; 25-Square groove; 26- Square hole; 27-with arc concave table; 3-coil positioning pin; 4-PCB test board pressing block; 41-square hole; 42-cylindrical boss; 5-press indenter contact block; 6- Return spring; 7-coil pin limit plunger; 8-cylindrical guide rod; 9-PCB test board.

Detailed ways

In order to better understand the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments, but the scope of protection claimed in the present invention is not limited to the scope represented by the embodiments.

As shown in Figures 1 to 8, a solenoid valve coil pin and circuit board assembly performance testing device includes an electronic servo press 1 provided with a force sensor, a displacement sensor, and a computer computing unit, and the electronic servo press 1 is placed The solenoid valve coil pin insertion force testing tool on the working platform, the solenoid valve coil pin insertion force testing tool includes from top to bottom:

The press indenter contact block 5 is located just below the output end of the electronic servo press 1, transmits the pressure output by the electronic servo press 1, and is provided with a PCB test board positioning groove at the bottom;

The PCB test board pressing block 4 is located directly below the press indenter contact block 5, and the edge is provided with a solenoid valve coil pin limit groove opposite to the PCB test board positioning groove through the upper and lower edges;

The T-shaped step block 2 includes a middle boss located directly below the PCB test board pressing block 4 , a low-level step 21 and a high-level step 22 located on both sides of the middle boss, and the middle boss faces the low position. One side of the step 21 is provided with a solenoid valve coil pin limiting slot limiting mechanism, the high-level step 22 is provided with a circular hole, and a coil positioning pin 3 is vertically fixed in the circular hole, and the coil positioning The upper end of the pin 3 is provided with a certain draft angle, as shown in FIG. 7 .

The bottom of the press indenter contact block 5 is provided with a PCB test board positioning groove opposite to the solenoid valve coil pin limit slot; as shown in FIG. 8 , the solenoid valve coil pin limit slot includes a The two square holes 41 arranged in parallel in the vertical direction are used for the limit and positioning of the coil pin during the solenoid valve coil insertion and extraction force test; With a circular arc concave table 27, it is used to place the solenoid valve coil pin and perform the solenoid valve coil pin pressing force test, that is, the solenoid valve coil pin can be limited during the solenoid valve coil pin pressing force test. , and at the same time prevent damage caused by excessive bending of the connection between the solenoid valve coil pin and the coil.

The bottom of the press indenter contact block 5 is vertically fixed with two cylindrical guide rods 8 in parallel. The two cylindrical guide rods 8 are slidably matched with circular guiding holes; the side of the PCB test board pressing block 4 opposite to the middle boss is provided with two guiding circular holes coaxial with the guiding circular holes on the PCB test board pressing block 4 The cylindrical boss 42 is shown in FIG. 8 ; the circular holes 24 on both sides that are clearance fit with the cylindrical boss 42 are coaxially arranged in the guide circular hole of the middle boss. Thereby, the press indenter contact block 5, the PCB test board pressing block 4 and the T-shaped step block 2 are effectively prevented from being laterally displaced during the relative movement, thereby ensuring the reliability, stability and accuracy of the test.

As shown in FIG. 7 , a spring mounting hole 23 is also provided between the circular holes 24 on both sides. The spring mounting hole 23 is provided with a return spring 6 abutting against the PCB test board pressing block 4 . In the setting of the system load during the test and the reset of the PCB test board pressing block 4 and the press indenter contact block 5 after the test is completed, when the indenter of the electronic servo press 1 is lifted, the reset spring 6 will use its The elasticity makes the PCB test board pressing block 4 and the press indenter contact block 5 disengage from the T-shaped step block 2 .

Specifically, the solenoid valve coil pin limit slot limit mechanism includes:

The square groove 25 is vertically arranged on the side of the middle boss facing the lower step 21, for placing the solenoid valve coil pin and performing the solenoid valve coil pin pull-out force test;

The square hole 26 extends laterally into the middle boss and intersects with the square groove 25;

The coil pin limiter rod 7 is inserted into the square hole 26, and cooperates with the square groove 25 to perform a fixed limit when testing the pull-out force of the solenoid valve coil pin.

As shown in Figure 9, a method for measuring the assembly performance of a solenoid valve coil pin and a circuit board using the device, including the steps:

S1. Measure and test the load of the tooling system;

S2. Measure the pressing force between the solenoid valve coil pin and the PCB test board;

S3. Measure the pull-out force between the solenoid valve coil pin and the PCB test board;

S4. According to the obtained press-fit force and pull-out force and the no-load press-fit force of the system, the actual press-fit force and pull-out force of the solenoid valve coil pin and the PCB test board are obtained respectively.

As shown in FIG. 2 , the system load test in step S1 is a system no-load test when the system is not equipped with a solenoid valve coil, and the set pressure is applied to the press indenter contact block 5 of the test device by the electronic servo press indenter to complete the test. System load test, record the system load pressing force at this time.

Specifically, the step S2 includes the following steps:

S21. Install the solenoid valve coil on the coil positioning pin 3 of the high ladder of the T-shaped step block 2, then place the PCB test board on the solenoid valve coil pins, and then pass the PCB test board to press the block 4 and the press to press The head contact block 5 presses the PCB test board, and the PCB test board 9 is not pressed into the solenoid valve coil pin at this time, as shown in Figure 3(a) and Figure 3(b);

S22, start the electronic servo press, apply setting pressure to the press indenter contact block 5 of the test device, and the PCB test board pressing block 4 of the test device and the press indenter contact block 5 are under the pressure of the press indenter Move until the limit position is reached, at which time the PCB test board 9 has been pressed into the coil pins, and the pressing force of the test device is recorded, as shown in Figure 4(a) and Figure 4(b).

Specifically, the step S3 includes the following steps:

S21. Install the solenoid valve coil to the lower step of the T-shaped step block 2, insert the coil pin limit rod 7 to limit and fix the coil pin that has been press-fitted in step S2, and then pass the PCB test board to press the block 4 Press the PCB test board 9 with the press indenter contact block 5. At this time, the solenoid valve coil pins are not pulled out of the PCB test board, as shown in Figure 5(a) and Figure 5(b);

S22, start the electronic servo press, apply setting pressure to the press indenter contact block 5 of the test device, and the PCB test board pressing block 4 of the test device and the press indenter contact block 5 are under the pressure of the press indenter Move until the limit position is reached, at which time the PCB test board has been pulled out from the coil pins, and the pull-out force of the test device is recorded, as shown in Figure 6(a) and Figure 6(b).

In the embodiment, in the step S4, the press-fit force and the pull-out force obtained in the step S2 and the step S3 are respectively subtracted from the no-load press-fit force of the system in the step S1, and the solenoid valve coil pin and the PCB test board 9 can be obtained respectively. the actual press-fit and pull-out force.

The embodiments of the present invention are not limited by the above-mentioned embodiments, and other changes, modifications, substitutions, combinations and simplifications made under the spirit and principle that do not deviate from them should be equivalent substitution methods, which are all included in the present invention. within the scope of protection.

Claims (10)

1. A solenoid valve coil pin and circuit board assembly performance testing device, comprising an electronic servo press (1) provided with a force sensor, a displacement sensor, and a computer computing unit, and a working platform on which the electronic servo press (1) is placed The solenoid valve coil pin insertion force testing tool is characterized in that, the solenoid valve coil pin insertion force testing tool includes sequentially from top to bottom: The press indenter contact block (5) is located just below the output end of the electronic servo press (1), transmits the pressure output by the electronic servo press (1), and is provided with a PCB test board positioning groove at the bottom; The PCB test board pressing block (4) is located directly below the press indenter contact block (5), and the edge is provided with a solenoid valve coil pin limiter opposite to the PCB test board positioning groove up and down through the edge groove; The T-shaped step block (2) includes a middle boss located just below the PCB test board pressing block (4), a low-level step (21) and a high-level step (22) located on both sides of the middle boss, so The side of the middle boss facing the low step (21) is provided with a solenoid valve coil pin limit slot limit mechanism. 2. The device for testing the assembly performance of the solenoid valve coil pin and the circuit board according to claim 1, wherein the bottom of the press indenter contact block (5) is provided with a limit slot for the solenoid valve coil pin The opposite PCB test board positioning groove; the solenoid valve coil pin limit groove includes two square holes (41) arranged in parallel along the vertical direction; the top edge of the middle boss is provided with the two square holes The hole (41) is opposite to the arc-shaped concave platform (27). 3. The device for testing the assembly performance of solenoid valve coil pins and circuit boards according to claim 1, characterized in that two cylindrical guide rods (8) are vertically fixed at the bottom of the press indenter contact block (5) in parallel. ), the central bosses of the PCB test board pressing block (4) and the T-shaped step block (2) are coaxially provided with circular guide holes for sliding cooperation with the two cylindrical guide rods (8); The PCB test board pressing block (4) is provided with two cylindrical bosses (42) coaxial with the guiding circular holes on the PCB test board pressing block (4) on one side opposite to the middle boss. The circular holes (24) on both sides that are clearance fit with the cylindrical boss (42) are coaxially arranged in the circular guiding holes of the boss. 4. The device for testing the assembly performance of the solenoid valve coil pin and the circuit board according to claim 3, characterized in that a spring mounting hole (23) is also provided between the circular holes (24) on both sides. A return spring (6) abutting against the PCB test board pressing block (4) is arranged in the hole (23). 5 . The device for testing the assembly performance of solenoid valve coil pins and circuit boards according to claim 1 , wherein a circular hole is provided on the high-level step ( 22 ), and a coil is vertically fixed in the circular hole. 6 . A positioning pin (3), the upper end of the coil positioning pin (3) is provided with a certain draft angle. 6. The device for testing the assembly performance of the solenoid valve coil pin and the circuit board according to claim 1, wherein the solenoid valve coil pin limit slot limit mechanism comprises: a square groove (25), vertically arranged on the side of the middle boss facing the lower step (21), for placing the solenoid valve coil pin; a square hole (26), extending laterally into the middle boss and intersecting with the square groove (25); The coil pin limit insertion rod (7) is inserted into the square hole (26), and cooperates with the square groove (25) to perform a fixed limit during the pull-out force test of the solenoid valve coil pin. 7. A method for testing the assembly performance of a solenoid valve coil pin and a circuit board using the device according to any one of claims 1 to 6, comprising the steps of: Measure test fixture system load; Measure the pressing force between the solenoid valve coil pin and the PCB test board; Measure the pull-out force between the solenoid valve coil pin and the PCB test board; According to the obtained press-fit force and pull-out force and the no-load press-fit force of the system, the actual press-fit force and pull-out force of the solenoid valve coil pin and the PCB test board are obtained respectively. 8. The method for testing the assembly performance of a solenoid valve coil pin and a circuit board according to claim 7, wherein the step of measuring the load of the test tooling system specifically comprises: When the solenoid valve coil is not installed, the set pressure is applied to the press indenter contact block (5) through the indenter of the electronic servo press (1) to complete the system load test, and the system load pressurization force is recorded at this time. 9. The method for testing the assembly performance of the solenoid valve coil pin and the circuit board according to claim 7, wherein the step of measuring the pressing force of the solenoid valve coil pin and the PCB test board specifically comprises: Install the solenoid valve coil on the coil positioning pin (3), and place the solenoid valve coil pin in the limit slot of the solenoid valve coil pin for positioning; Next, place the PCB test board (9) between the press indenter contact block (5) and the PCB test board pressing block (4) and above the solenoid valve coil pins, and then pass the PCB test board pressing block (4) Press the PCB test board (9) with the press indenter contact block (5); Start the electronic servo press (1), apply the set pressure to the press head contact block (5), push the PCB test board (9) into the solenoid valve coil pin, and record the press-fitting force of the test device at this time. 10. The method for testing the assembly performance of the solenoid valve coil pin and the circuit board according to claim 7, wherein the step of measuring the pull-out force of the solenoid valve coil pin and the PCB test board specifically comprises: Install the solenoid valve coil on the lower step of the T-shaped step block (2), place the PCB test board between the PCB test board pressing block (4) and the middle boss, and insert the coil pin limiter rod (7). ) to limit and fix the press-fitted solenoid valve coil pin, and then press the solenoid valve coil pin and the PCB test board ( 9); Start the electronic servo press (1), apply the set pressure to the press head contact block (5), push the solenoid valve coil pin to disengage from the PCB test board (9), and record the test device pull-out force at this time.

Images