A method for processing qualified oblique holes on the surface of a metal mask frame with a margin

Abstract

The invention discloses a method for processing qualified oblique holes on the surface of a metal mask frame with a margin. The specific steps are as follows: the first step, processing marked holes: firstly, a CNC machine tool or a drilling machine is used to process marked holes on the product surface. The marked hole is a vertical hole; the second step, processing the guide hole: then, on the basis of the marked hole, use a boring machine to process a guide hole, which is an oblique hole; the third step, process the through hole: then process the guide hole On the basis of the through hole, the through hole is broken down by electric spark, and the through hole is an oblique through hole; the fourth step is to process the qualified oblique hole: finally, on the basis of the through hole, use the reaming drill to expand the hole to the size requirement, and obtain the qualified oblique hole. hole. This method can reduce human, material and financial resources, reduce the expenditure for purchasing high-precision special drilling machines or multi-axis machines, and effectively improve processing efficiency. After theoretical calculation evaluation and actual processing product verification, it is feasible.

Description

technical field [0001] The invention relates to the technical field of a method for manufacturing a metal mask frame in an OLED screen assembly, in particular to a method for processing qualified oblique holes on the surface of the metal mask frame with a margin. Background technique [0002] The technology of OLED display panels is changing with each passing day, and it is now widely used in TVs, computers, smart phones, and smart watches. It has broad prospects in terms of display effects and scope of application, so a large number of manufacturers have entered the market , and looking at the entire OLED manufacturing process, how to reliably form a film is the most important thing. At present, the method of vacuum evaporation and metal mask is generally used in the industry, and the metal mask can be divided into openings Masks and Fine Masks. [0003] The open mask forms a general layer for the cavity space during evaporation, and the fine mask can be divided into two p...

AI Technical Summary

Problems solved by technology

However, as the current OLED industry tends to be more sophisticated, and the requirements for Mask Frame accuracy continue to increase, the processing becomes more difficult and the cost rises.

An overview of this product, there are several highly demanding oblique holes around the product for light transmission positioning and other purposes, but considering the actual situation of the manufacturer, there is often no multi-axis machining center or a dedicated integrated machine tool, plus the need to drill oblique holes The most suitable position in the process route and the problems involving triangular calculations when leaving a margin lead to inaccurate or even difficult processing of inclined holes. Therefore, the processing of inclined holes has become the processing of each structure of the metal mask frame. a key topic of

[0005] In the absence of a dedicated multi-axis machine tool, in order to process the oblique hole on the Mask Frame, the manufacturer often uses an EDM machine to punch the hole. At this time, the product needs to be placed obliquely. It is fashionable and possible in ordinary precision, but in precision There will be problems when processing the extremely demanding Mask Frame: Since the product is in an inclined state at this time, the EDM copper tube lacks a reliable guide hole when it enters, and the position accuracy when entering cannot be guaranteed. The position and diameter size cause a huge deviation (the deviation even reaches the millimeter level in the sample test), so the guide hole must be processed in advance. After the guide hole is processed, it can be used for the operator to calibrate the position at the beginning of the EDM process, or it can be used during the EDM process. When the copper pipe enters, it is used as a guide, but the problem arises: because the Mask Frame product is large and flat, if there is no special multi-axis machine tool for processing, the ordinary three-axis machine tool cannot process the inclined hole guide hole, so it needs to be placed on the boring machine at an angle for processing , but still due to the above-mentioned characteristics of the product, the product cannot be placed vertically on the boring machine directly through the pressure plate or magnetic attraction. In addition, even if it can be placed in a suitable position on the boring machine, the workpiece will be in a tilted state during processing and the outer surface is still at this time. There is a margin, and there is a trigonometric function deviation between the measured hole position and the actual hole position in the margin direction. If it is directly processed at this time, the actual product will still have a deviation of 0.1mm level, which is still true for the product. is unqualified

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