Micro-moving mechanism for driving screen plate through servo motors in high-precision printing machine

Abstract

The invention discloses a micro-moving mechanism for driving a screen plate through servo motors in a high-precision printing machine. The position of the screen plate can be adjusted, the precision is high, micro-motion adjustment can be realized, and the adjusting precision and reliability are guaranteed. The mechanism comprises an assembling horizontal plate, wherein the assembling horizontal plate is of a rectangular structure and comprises four frame edges and a central rectangular hollow hole, a hook plate air cylinder and a pressing plate bolt are assembled at the four corners of the front face of the assembling horizontal plate, a piston rod of the hook plate air cylinder penetrates through the assembling horizontal plate and is provided with a hook plate at the end, the pressing plate bolt penetrates through the assembling horizontal plate, the end part of the pressing plate bolt is a pressure head, a steel screen is arranged between the hook plate and the pressing head, eachof the two frame edges in the X direction of the back surface of the assembled horizontal plate is provided with an X-axis driving motor assembly and two X-direction ejector rods, each of the two frame edges in the Y direction is provided with a Y-direction ejector rod and two Y-direction driving motor assemblies, and the two Y-direction driving motor assemblies are a Y I driving motor assembly and a Y II driving motor assembly respectively.

Description

technical field [0001] The invention relates to a micro-motion mechanism, in particular to the fine-tuning of a screen for a solder paste printing machine. Background technique [0002] In the SMT industry, circuit boards are coated with solder paste by a printing machine, and then undergo component assembly and reflow soldering processes, and finally realize the complete production of PCBs; the printing machine in the prior art has been converted from manual coating to semi-automatic printing. , the cylinder drives the scraper and the stencil to drop to the surface of the PCB. After the scraper lands, the solder paste is repeatedly scraped left and right along the surface of the stencil; the reason why this process is semi-automatic is that it is necessary to manually fix the PCB on the fixture and remove it manually. process, which is a waste of time; [0003] We are committed to making a fully automatic solder paste printing machine, and at the same time we need to impro...

AI Technical Summary

Problems solved by technology

[0002] In the SMT industry, circuit boards are coated with solder paste by a printing machine, and then undergo component assembly and reflow soldering processes, and finally realize the complete production of PCBs; the printing machine in the prior art has been converted from manual coating to semi-automatic printing. , the cylinder drives the scraper and the stencil to drop to the surface of the PCB. After the scraper lands, the solder paste is repeatedly scraped left and right along the surface of the stencil; the reason why this process is semi-automatic is that it is necessary to manually fix the PCB on the fixture and remove it manually. process, which is a waste of time;

[0003] We are committed to making a fully automatic solder paste printing machine, and at the same time we need to improve the accuracy of the scraper; in the design of the automatic printing machine, the scraper driving method of the existing semi-automatic printing machine is not suitable, specifically, in the process of improving the accuracy Among them, we found that the positioning of the PCB is very important. When the position of the PCB deviates from the position of the stencil, the accuracy will be greatly reduced. Therefore, if the position of the stencil can be adjusted, the printing accuracy can be greatly improved; but the adjustment structure is a small distance adjustment , the traditional stepper motor-driven moving mechanism has low precision, and it is difficult to ensure reliable precision

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