On-line test attachment

Abstract

The invention relates to an in-circuit testing equipment, comprising a testing machine station, a jig box and a press machine station, wherein after the testing pinned testboard is transshipping-located on the location slot rail arranged under the pressing board of the press machine station, the circuit board under test can be arranged on the substrate of the jig box, simultaneously the shaft lever of the driving motor of the press machine station is switched on to rotate in forward direction or reversely, and a guide screw is driven downward or upward by a transmission component, so that the pressing board can be accurately controlled further to displace downward or upward to enable the other ejector of the testing pinned testboard to be propped-pressed on the circuit board in appropriate strength or displace upward, and the accurate and stable contact between the circuit board and the testing pinned testboard can be kept, so that the testing process of the circuit board under test can be operated to ensure the quality of the circuit board products, and improve the repair efficiency of the defective products.

Description

technical field [0001] The present invention relates to an on-line testing device, in particular to a method of precisely controlling the up and down movement of the pressing plate by using the forward or reverse rotation of the shaft of the drive motor, and further enabling rapid replacement of test needle plates of different specifications. Positioned under the pressure plate, it is an online testing tool for testing the circuit board to be tested. Background technique [0002] With the rapid advancement of electronic technology, the production method of circuit boards has changed from early manual and semi-automatic to the current fully automated mass production, which can be said to greatly reduce the manufacturing and production costs of circuit boards; however, no matter what kind of circuit boards are produced The produced circuit board usually has to go through various types of tests before leaving the factory, such as: electromagnetic wave test, circuit power consum...

AI Technical Summary

Problems solved by technology

[0004] However, the online testing equipment currently used by manufacturers has its flaws in actual operation. That is, because manufacturers do not only produce circuit boards for a single type of electrical product, they must be tested according to the specifications of each circuit board. Type, size and function, to match the appropriate test needle board, and every time the test needle board is replaced, the test needle board must be manually fixed and positioned under the pressure plate, which not only consumes a lot of precious time, but also reduces test efficiency , and when it is manually fixed, it is not easy to accurately position the test needle board under the pressure plate. In addition, when the pressure plate is driven to move downward to make the thimble of the test needle board press against the circuit board, uneven pressure on the circuit board often occurs. It causes deviation during the test process, affects the test results, and even causes damage to the entire online test equipment. Furthermore, because the downward displacement of the pressure plate is driven by the hydraulic cylinder, there are also the following The missing:

[0005] 1. Under the principle of inertia, if the displacement speed of the hydraulic cylinder cannot be kept constant, it will inevitably cause the pressure plate to vibrate, and further make the thimble of the test needle plate press against the circuit board, which will affect the test results and even cause damage

[0006] 2. Since the displacement speed of the hydraulic cylinder changes with the flow rate of the hydraulic pressure, the size of the pipeline has a significant impact on its displacement speed. If a small pipeline is used, the displacement speed will be relatively slow, which will affect the test progress If a large pipeline is used, there are also difficulties in practical design, and when switching in the middle of the test to speed up the test, the vibration of the pressure plate will be caused because the displacement speed cannot be kept fixed.

[0007] 3. When the thimble of the test needle board is pressed against the circuit board, the signal will be transmitted through the positioning detector for the next detection action. Since the positioning detector usually has a time difference, when the displacement speed of the hydraulic cylinder cannot be unified , will cause the platen to be unable to be positioned precisely

[0008] 4. When encountering a two-stage test needle board, when the long and short thimbles on it press against the circuit board, the displacement speed of the hydraulic cylinder will also be inconsistent, which will affect the test results and cause errors

[0009] 5. Under long-term use of the hydraulic cylinder, the sealing ring inside will leak, and the leaked liquid gas will not only cause damage to the external environment, but also affect the yield of related electronic components on the circuit board, and cause the shutdown of the production line and The increase in the number of repairs will cause unnecessary losses to the industry

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