fixture design

Fixture design is a delicate work. Every detail should be taken into consideration. Otherwise, when assembling, we will find that this part is reversed, that part has forgotten to sink its head, it has been enlarged here, and it has forgotten to open a hole there, and the hole position is deviated.

Fixture design, unlike the general mechanical design, mold design. Computer gong processing general mechanical design cycle is very long, so there is time to check, draw 3D drawings to check the assembly and so on. Fixture design lead time is very short, slow is three days, fast and the next day to order. Due to the processing, assembly and so on, the time left for design is quite small.

Experienced fixture design engineer, the problems are generally more comprehensive. He will infer what problems will occur after the fixture is processed according to the problems or unsatisfactory places that have occurred before. In view of these problems and deficiencies, an improved countermeasure is made to make the function of the fixture more convenient and ideal.

Fixture design for fixture design engineers, is the test of experience, is the grasp of the structure.

It can be said that the success or failure of the fixture depends on 80% of the fixture designer’s design, and 20% of the fixture is determined by processing and assembly.

The imported products are generally from Germany, the United States and Japan. The brands include ingun, TCI, Xinhua, Huarong, Zhongtan, yatan, etc.

The quality of the test probe is mainly reflected in the material, coating, diameter accuracy of spring and sleeve and manufacturing process. At present, the processing of mechanical parts includes domestic products, and many of them are made of imported materials. Therefore, unless it is a shoddy process, the material problem of the probe is not very big. The diameter accuracy of the needle and sleeve in China is similar to that of Taiwan and Hong Kong products. The import is slightly better, but the general impact is not great. The quality of spring and coating processed by Dongguan Mechanical parts is much better than that of domestic products, The results show that the coating made in Hong Kong, Taiwan is slightly better than that in China. The main reason is that the coating made in China has poor wear resistance and the coating is easy to fall off.

If the test fixture is manufactured and used for more than 150000 times, it is more appropriate to select imported products, but the imported probes are more expensive. At present, the production level and technology in China are gradually improved, and in the current price war, many agents use domestic needles as imported or Taiwan made probes for sale.

If the test requirements and test times are not high, it is recommended to use domestic probes. The quality of the probe is mainly related to the test times and good contact in the manufacture of the test fixture. Design principle of fixture:

1. Meet the stability and reliability of workpiece positioning in the process of use.
2. Enough bearing or clamping strength is required to ensure the construction process of workpiece on the tooling and fixture.
3. Meet the simple and fast operation in the clamping process.
4. The vulnerable parts must be the structure that can be quickly replaced, and it is better not to use other tools when the conditions are sufficient.
5. Meet the reliability of repeated positioning of tooling and fixture in the process of adjustment or replacement.
6. Avoid complex structure and high cost as far as possible.
7. As far as possible, select the standard products with reliable quality in the market as the assembly parts.
8. Meet the safety laws and regulations of the country or region where the fixture is used.
9. The design scheme follows the priority principle of manual, pneumatic, hydraulic and servo.

Tooling and fixture processing, tooling and fixture design, tooling and fixture price consulting, tooling fixture technical consulting.

CT test fixture can effectively find all kinds of defects and faults in SMT assembly process, but it can not evaluate the performance of the whole PCB system at clock speed. The function test can test whether the whole system can achieve the design goal. It takes the unit under test on the circuit board as a functional body to provide input signal. Dongguan high-speed computer gong processing detects the output signal according to the design requirements of the functional body. This test is to ensure that the circuit board can work normally according to the design requirements. Dongguan CNC machining center so the simplest method of function test is to connect the special circuit board of an electronic equipment assembled to the appropriate circuit of the equipment, and then apply voltage. If the equipment works normally, it indicates that the circuit board is qualified. This method is simple and less investment, but it can’t diagnose fault automatically.

Hongze electronic equipment factory main products: assembly fixture, welding fixture, disassembly fixture, dispensing fixture, irradiation fixture, adjustment fixture, shear fixture, CT test fixture, FCT functional fixture, SMT furnace pass fixture, BGA test fixture and CCD test fixture, glass parts, ceramic parts, automation equipment, etc,