The test bench is equipped with specialized (universal, universal) fixtures and specialized fixturesAutomotive functional test bench
To meet the installation and testing needs of different types of test specimens.
The standards referenced by the test bench are as follows:
QC/T 413-2002 "Basic Technical Conditions for Automotive Electrical Equipment"
QC/T 632-2000 "Technical Conditions for Bent Switches for Automobiles"
QC/T 198-1995 General Technical Conditions for Automotive Switches
European, American, Japanese, and other relevant domestic standards

2、 Product Technical DescriptionAutomotive functional test bench
1. Main functions and testing items
1.1 Contact point, disconnection, and pressure drop detection;
1.2 Overload performance and resistance to abnormal power supply voltage test;
1.3 Durability test of switch;
1.4 User defined experiment (the experimental steps are freely set by the user)
2. Test bench structure and composition
2.1 The test bench consists of a computer control system, a switch test bench, and a load box; Using aluminum
The profile frame structure, electrical control part, and test bench are independent integrated structures. Each
Part of the structure is compact, the layout is reasonable, and the human-computer interaction interface is good. Installation at the bottom of the platform
Mobile scroll wheel for easy movement and fixation.
2.2 Appearance color: According to industrial design requirements, both the load box and the electronic control part box are made of steel
Structural spray coating treatment, with a light gray (computer color) appearance, and the overall appearance of the equipment is beautiful
Generous and easy to operate.
2.3 The test bench system adopts closed-loop control, with sound and light alarms in case of misoperation or error
Function and stop working in a timely manner;
3. Characteristics of the test bench
Can meet the testing requirements of various toggle switches, button switches, rotary switches, and toggle switches.
The installation method of the test sample fully simulates the installation state of the actual vehicle. The front end of the fixture is equipped with elastic components to simulate manual operation.
The fixed fixtures for the motor and cylinder are convenient for three-dimensional adjustment. In the experiment, only the fixed fixtures for the corresponding driving devices need to be adjusted, without the need to adjust the sample fixtures.
Universal fixtures can meet the needs of most switch tests, and one clamping can complete all tests for a single switch.
The test bench can simultaneously test three identical or different samples, and the software can display the interfaces of three workstations simultaneously or display the interface of a single workstation separately.

4. Detailed description of the test bench

4.1 Mechanical operation console section
The test bench can install three rocker switches simultaneously for testing, using a stepper motor
Driven by SMC cylinder, the motion is smooth, the operating noise is low, and the action accuracy is high. ability
Conduct a lifespan test on the durability of the switch according to the pre-set mode as required by the standard
The workstation structure is independently driven, and the experimental process does not interfere with each other (i.e., three workstation mechanical actions, clamping)
The equipment and software are completely independent, and can be tested independently or synchronously.
The test bench completes various actions such as button switches, rocker switches, and rotary switches. Transportation
The moving mechanism and fixture can be adjusted freely, and the switch does not move, making it very convenient to fully simulate
Manual operation improves experimental efficiency.
◇ Up and down press action mechanism:
Each workstation is composed of one set of four flexible needle shaped pneumatic cylinders, which enable buttons to be pressed up and down
Linear action, the speed of the action is adjusted by the speed regulating valve, and the power is adjusted by the pressure regulating valve
Whole; Each cylinder action can be individually controlled by a computer, and the force magnitude of each cylinder group can be determined
Controlled by manual adjustment.
◇ Twisting action mechanism:
Driven by a stepper motor, the switch is achieved through a flexible bearing driven by a dedicated fixture
The twisting action is smooth and the positioning accuracy is accurately controlled. Can be defined arbitrarily in 360 °
The angle and speed of the rotation action are controlled by the system software.
Each workstation's rotating mechanism is equipped with three proximity switches, which respectively achieve mechanical control
The functions of origin and left and right limit positions, during the durability test, are controlled by the computer through mechanical means
Point to eliminate accumulated errors in motion, ensuring the accuracy and reliability of the experiment.

To ensure stable and reliable operation of the equipment during durability, the system automatically returns to the positioning point during operation, and the calibration function can also be manually calibrated.
The basic actions of the device are as follows:
☆ Press action (adjustable stroke, speed, and force)
☆ Rotation action (simulating manual operation, the rotation mechanism has movable joints, flexible rotation)
The above actions can be performed separately or separately through settings
Composition of composite actions; The speed and angle of the action can be within a certain range
Set up in the sequence, the experimental actions of the three workstations are completely independent of each other
Non interfering, can be tested synchronously or not synchronously.
Durability test for toggle switch and button switch
The switch is installed on the test fixture and can complete the durability performance test of the switch
Simultaneously conduct durability tests on three sets of switches, and also test three different switches simultaneously.
Each workstation of the test bench is equipped with 4 small cylinders, which can respectively control multiple switches on each set of switches
Conducting experiments can meet the testing needs of most switches.

Durability test of rotary switch
The rotary switch is installed on the test fixture and can test three sets of rotary switches simultaneously. The driving mechanism is installed on an adjustable device, and when adjusting, only the adjustment handle needs to be transferred to achieve the position adjustment of the motor and cylinder.
Overload capacity test

Adjust the test current to the required value (high current output can also be achieved by parallel connection of two circuits), the computer automatically controls the on and off time of the switch, and conducts a certain number of tests. The computer automatically determines whether the contacts are stuck and measures the relevant voltage drop.
Power polarity reversal resistance and overvoltage resistance performance
Determine whether there is a fault in the test contact by measuring the reverse voltage value of the test contact; According to the relevant product requirements, the computer automatically loads the corresponding overvoltage, and the product should not malfunction.
Test fixture:
A set of universal fixtures can meet the testing needs of most switches, while special types require specialized fixtures to be configured as needed.
4.2 Computer Control Section
1) Computer system configuration:
Industrial control computer In Atom/1G/500g/DVD
◇ 19 'LCD display;
◇ Inkjet printers and accessories;;
2) Computer control board and circuit
3) High speed and high-precision data acquisition card
4) Computer programmable cabinet (including control electrical appliances)
5) 3-channel motion control board and accessories
4.3 Control and Data Processing Software
WINDOWS operating platform, easy to operate, can set various experimental parameters,
Save experimental data;
1) Management module
It has a user management module and a product model management module.
The user management module can manage the management permissions of test personnel, and administrators can modify and adjust test parameters. Operators can only perform relevant test operations and cannot modify parameters to prevent test abnormalities caused by misoperation.

In the product model management module, a product model of a switch can be added or deleted, and the corresponding motion steps can be edited based on the product model;
It can display a single workstation interface independently, display multiple workstation interfaces simultaneously, or selectively display the interfaces of two workstations.

2) Parameter setting module:
Editable parameters such as left and right rotation angles and speeds can be combined to create different experimental movements
Suitable for durability testing of various switches; Can set the number of tests and failure criteria (contacts)
Pressure drop, number of failures, testing methods, etc.

You can choose to conduct tests by frequency or failure mode. Can measure parameters such as contact voltage drop
Set and modify.
3) System functional modules:
Divided into system management module, printing module, and customizable test report format; system function

Module: divided into system management module, printing module, modifiable content of relevant test reports
4) Test report module:
During the experiment, parameters such as the number of tests, voltage drop, and current can be recorded in real time
Change the content of relevant test reports, print test reports, and print them by time or number of inspections
Print inspection data, and record the total number of qualified and unqualified reports for each level and inspection point;
And print the current pressure drop curve graph. The experimental data can be exported to an EXCEL file,
In order to save, edit, and print.
5. Test load and power supply
Power supply: (3 units)
Within the full voltage range of 0-30V, it can output a current of 0-80A at any voltage, which can be manually adjusted; Each workstation is equipped with an independent power supply and has power output terminals for easy use by other external devices.
◇ Resistive load: (12 circuits in total)
One workstation: 4 channels from 0.1-20A, with a total current of 80A;
Two workstations: 4 channels from 0.1-20A, with a total current of 80A
Three workstations: 4 channels from 0.1-20A, with a total current of 80A
Control mode: Manual knob adjustment for load voltage, with a digital voltmeter display, voltmeter accuracy+0.5% FS, display resolution 0.1V; manual adjustment for load current, load current adjustment accuracy: ± 0.5A; each channel on the panel has a corresponding digital ammeter display, ammeter accuracy+0.5% FS, display resolution 0.1A;
3、 Technical indicators of the test bench
3.1 Mechanical Properties
◇ Action speed: angular velocity 5-10 degrees per second, linear velocity 0-100 millimeters per second,
The action speed is adjusted through the program, with an accuracy of ± 1% FS.
The action includes: rotation angle range+180 degrees, accurate to+0.5 degrees;
Test action cycle: 1-30 times/minute, action speed and pause time can be adjusted
Adjust through computer settings; Gear dwell time: 10ms~9999ms;
Cylinder stroke: not less than 15mm, accuracy ± 0.5mm;
3.2 Electrical Performance
Contact voltage drop detection interface: 3 × 6 channels, 18 channels;
Contact voltage drop detection accuracy: ± 3mV, range: 1~499mV, can be set
The failure voltage drop of each detection contact is set within the range of 1~499mV;
Durability test frequency range: 1~999999 times;
◇ Work format: Can work continuously for a long time;
◇ Alarm function:
The contact will sound and light an alarm when it is constantly on, constantly off, or when the set number of times is reached; Number of detections
It can be accumulated and the test time and frequency can be accurately recorded. Tested it
When a malfunction occurs during the process, an audible and visual alarm will sound and the test will be stopped, with no one on duty.
4、 Usage conditions
◇ Humidity range: 10-90% (relative humidity);
◇ Operating temperature range: 0-40 ℃;
Power supply voltage: AC 220V ± 10%/50Hz, grounding wire;
◇ Working system: unmanned working system;
Air source: 0.4~0.6MPa, flow rate 0.4L/s;