Novel universal PCB (printed circuit board) testing machine with double-crank connecting rod pressed precisely

Abstract

The invention discloses a novel universal PCB (printed circuit board) testing machine with a double-crank connecting rod pressed precisely and relates to the field of PCB testing. The novel universal PCB testing machine comprises a bottom plate, a side plate, a middle upright plate, a fastening box, a wedged micro-adjusting mechanism and a double-crank connecting rod mechanism, wherein the wedged micro-adjusting mechanism comprises an adjustable wedged base, the double-crank connecting rod mechanism comprises a main servo motor, a servo eccentric wheel, a servo connecting rod, a main crank connecting rod and a main crank connecting rod base, the main servo motor is fixed on the side plate, an output shaft of the main servo motor is connected to the servo eccentric wheel, the main crank connecting rod divides the main crank connecting rod into two parts by a middle shaft which is connected with one end of the servo connecting rod, and the other end of the servo connecting rod is rotationally connected with the servo eccentric wheel, the upper end of the main crank connecting rod is connected with the adjustable wedged base rotationally, and the lower end of the main crank connecting rod is rotationally connected with the main crank connecting rod base fixed on the bottom plate of the testing machine. The novel universal PCB testing machine has the advantages that testing accuracy, stability and control of indentation depth are improved, noise is effectively reduced and energy resources are saved.

Description

technical field [0001] The invention relates to the field of PCB testing, in particular to a novel universal testing machine for PCB with double crank connecting rods precisely pressed together. Background technique [0002] With the development of the PCB industry, manufacturers have developed various types of PCB testing machines accordingly to meet the needs of PCB circuit board testing. Traditional PCB general-purpose testing machines generally use servo motors to drive ball screws to drive components such as test fixtures on the testing machine, and there are also PCB testing machines that use cylinders as the driving source on special testing machines. However, due to the higher and higher requirements for the density and precision of PCB boards, the PCB universal testing machine has increased from double density to four density in 10 years, and now there is an eight-fold density PCB testing machine, that is, HDI high-precision testing machine. However, the current c...

AI Technical Summary

Problems solved by technology

However, due to the higher and higher requirements for the density and precision of PCB boards, the PCB universal testing machine has increased from double density to four density in 10 years, and now there is an eight-fold density PCB testing machine, that is, HDI high-precision testing machine. However, the current cylinder or ball screw mechanism is difficult to meet the requirements of high-precision testing, and when testing the PCB board, due to the different thickness of the PCB board, it is also very difficult to control the depth of the PCB board scratch marks. , the noise of the ordinary testing machine is large (above 80 decibels), and the positioning control is difficult. The screw reaches the maximum force at the upper limit point of the test position, and the screw wears unevenly; The electric power is relatively large, and in the other 90% of the time, the force is only less than 10% of the force of the test position, resulting in a waste of motor power; the ball screw is difficult to lubricate, and the working environment is full of glass fibers and dust, which will speed up Wear of the ball screw shortens its service life

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