阅读说明：本技术 一种通用金属掩膜版焊接方法及制作的通用金属掩膜版 (Universal metal mask welding method and manufactured universal metal mask ) 是由 潘燕萍 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种通用金属掩膜版焊接方法及制作的通用金属掩膜版,属于显示面板制造装备领域。本发明的通用金属掩膜版焊接方法,其将掩模网的四周张网定位在金属框的上表面上,采用点焊工艺将掩模网的四周焊接固定在金属框上；对矩形掩模网的长边和短边分割焊接,先对矩形掩模网的长边和短边的中心焊接区进行焊接,然后再分别对矩形掩模网的长边和短边的对应端部焊接区进行焊接,改善了掩模网单边连续焊接而产生的累积挤压变形,提高了通用金属掩膜版的焊接位置精度；并且,焊接方法简单易行,实施方便,为提高通用金属掩膜版的制作精度提供了新思路。制作的通用金属掩膜版的位置精度更高,掩模网不易发生扭曲,保证了通用金属掩膜版的高精度。(The invention discloses a universal metal mask welding method and a manufactured universal metal mask, and belongs to the field of display panel manufacturing equipment. The invention relates to a universal metal mask welding method, which is characterized in that the peripheral meshes of a mask mesh are positioned on the upper surface of a metal frame, and the periphery of the mask mesh is welded and fixed on the metal frame by adopting a spot welding process; the long sides and the short sides of the rectangular mask net are welded in a split mode, the central welding areas of the long sides and the short sides of the rectangular mask net are welded firstly, and then the welding areas of the corresponding end portions of the long sides and the short sides of the rectangular mask net are welded respectively, so that accumulated extrusion deformation caused by single-side continuous welding of the mask net is improved, and the welding position precision of the universal metal mask plate is improved; and the welding method is simple and easy to implement, is convenient to implement, and provides a new idea for improving the manufacturing precision of the universal metal mask. The position precision of the manufactured universal metal mask is higher, the mask net is not easy to distort, and the high precision of the universal metal mask is guaranteed.)

1. A universal metal mask welding method comprises the following steps:

s1, positioning the peripheral meshes of the rectangular mask mesh (2) on the upper surface of the rectangular metal frame (1);

s2, welding and fixing the periphery of the rectangular mask net (2) on the rectangular metal frame (1) by adopting a spot welding process;

the method is characterized in that the step S2 comprises the following substeps:

s2-1, dividing the welding areas of the long sides and the short sides of the rectangular mask net (2), and dividing each side of the rectangular mask net (2) into a central welding area and end welding areas positioned at two ends of the central welding area;

s2-2, dividing the welding area according to the step S2-1, firstly carrying out linear spot welding on the central welding areas of the long sides and the short sides of the rectangular mask net (2) in sequence, then respectively carrying out linear spot welding on the corresponding end welding areas of the long sides and the short sides of the rectangular mask net (2), wherein the welding line of each side end welding area of the rectangular mask net (2) takes the starting point or the ending point of the welding line of the central welding area of the corresponding side as the starting point or the ending point of welding;

s2-3, and completing the welding and fixing of the periphery of the rectangular mask net (2) on the rectangular metal frame (1) in sequence according to the step S2-2.

2. The universal metal mask welding method according to claim 1, characterized in that: in step S2-2, the center lands of the two long sides of the rectangular mask mesh (2) are sequentially subjected to straight spot welding, and the center lands of the two short sides of the rectangular mask mesh (2) are sequentially subjected to straight spot welding.

3. The universal metal mask welding method according to claim 1, characterized in that: in step S2-2, the weld lines of the end weld zones of the long sides of the rectangular mask net (2) are welded to both ends with the start point or the end point of the weld line of the central weld zone as the welding start point.

4. The universal metal mask welding method according to claim 3, characterized in that: in step S2-2, when the length of the short side of the rectangular mask net (2) is long, the weld line of the end weld zone of the short side of the rectangular mask net (2) is also welded to both ends with the start point or the end point of the weld line of the center weld zone as the welding start point.

5. The universal metal mask welding method according to claim 4, characterized in that: in step S2-2, after the welding of the central weld areas of the long sides and the short sides of the rectangular mask net (2) is completed, the end weld areas of the two long sides of the rectangular mask net (2) are welded in order, and then the end weld areas of the two short sides of the rectangular mask net (2) are welded in order.

6. The universal metal mask welding method according to any one of claims 1 to 5, wherein: the welding is laser spot welding.

7. The universal metal mask welding method according to claim 6, characterized in that: the rectangular mask net (2) is made of Invar36, SUS304 or SUS 301.

8. The universal metal mask welding method according to claim 7, wherein: the thickness of the rectangular mask net (2) is 100 μm or 150 μm or 200 μm.

9. The utility model provides a general metal mask version, includes rectangle metal frame (1) and opens rectangle mask net (2) that the net welding was on rectangle metal frame (1), rectangle mask net (2) go up the array and be equipped with a plurality of openings (2-1), its characterized in that: the rectangular mask net (2) is welded and fixed on the rectangular metal frame (1) by adopting the universal metal mask welding method of any one of claims 1 to 8.

Technical Field

The invention relates to a metal mask welding method, in particular to a universal metal mask welding method and a universal metal mask manufactured by the same.

Background

In the production process of the OLED panel, one of the core processes is a vacuum evaporation process, a metal mask is a key part for realizing the process, and the precision of the metal mask directly determines the quality of the OLED panel. With the increasing global OLED panel production, the market demand for metal masks is also increasing. The Metal Mask mainly comprises a Common Metal Mask (CMM) and a Fine Metal Mask (FMM), wherein the CMM is mainly used in the production field of large-size OLED panels, and the FMM is mainly used in the production field of medium-size and small-size OLED panels.

The universal metal Mask (CMM) is mainly composed of a metal Frame (Frame) and a Mask mesh (Mask sheet) fixed on the metal Frame, and the Mask mesh is mostly fixed on the metal Frame by laser spot welding. The mask net area of the universal metal mask plate is large, a certain net tension force needs to be applied to the periphery of the mask net to enable the mask net to be flatly positioned on the metal frame, and the process is called as net tensioning. After the screen is positioned, the periphery of the mask screen is welded on the metal frame through laser spot welding. As shown in fig. 1, in order to solve the problem of the conventional universal metal mask (CMM) welding sequence, after positioning a rectangular mask net 2, the rectangular mask net 2 is welded to a rectangular metal frame 1 by a single-side continuous spot welding method, that is, four sides of the rectangular mask net 2 are sequentially fixed by continuous spot welding in the sequence of (i) () > ((ii) ()), (iii) ((iii)) and in one direction of each side arrow. Because the mask net size of general metal mask version (CMM) is great, unilateral continuous welding path is long, exists in the welding process by the extrusion of welding starting point to welding terminal point, and then leads to mask net's position accuracy to change, and the longer welding path, this kind of extrusion accumulated deflection also can be big more, leads to welding terminal point position to take place the distortion problem easily, seriously influences general metal mask version (CMM)'s preparation precision.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention aims to overcome the defect that the position precision of a mask is poor due to the fact that the welding accumulated deformation is large in the conventional universal metal mask, and provides a universal metal mask welding method and a universal metal mask manufactured by the universal metal mask welding method; and the welding method is simple and easy to implement, is convenient to implement, and provides a new idea for improving the manufacturing precision of the universal metal mask.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention discloses a universal metal mask welding method, which comprises the following steps:

s1, positioning the peripheral meshes of the rectangular mask mesh on the upper surface of the rectangular metal frame;

s2, welding and fixing the periphery of the rectangular mask net on the rectangular metal frame by adopting a spot welding process;

wherein, step S2 includes the following sub-steps:

s2-1, dividing the welding area of the long side and the short side of the rectangular mask net, and dividing each side of the rectangular mask net into a central welding area and end welding areas positioned at two ends of the central welding area;

s2-2, dividing the welding area according to the step S2-1, firstly carrying out linear spot welding on the central welding areas of the long sides and the short sides of the rectangular mask net in sequence, then respectively carrying out linear spot welding on the corresponding end welding areas of the long sides and the short sides of the rectangular mask net, wherein the welding line of each side end welding area of the rectangular mask net takes the starting point or the end point of the welding line of the central welding area of the corresponding side as the starting point or the end point of welding;

s2-3, and completing the welding and fixing of the periphery of the rectangular mask net on the rectangular metal frame in sequence according to the step S2-2.

Further, in step S2-2, the center lands of the two long sides of the rectangular mask mesh are sequentially subjected to straight spot welding, and then the center lands of the two short sides of the rectangular mask mesh are sequentially subjected to straight spot welding.

Further, in step S2-2, the welding line of the end welding area of the long side of the rectangular mask net is welded to both ends with the welding line start point or end point of the center welding area as the welding start point.

Further, in step S2-2, when the length of the short side of the rectangular mask net is long, the weld line of the end weld zone of the short side of the rectangular mask net is also welded to both ends with the start point or the end point of the weld line of the center weld zone as the welding start point.

Further, in step S2-2, after the welding of the central weld areas of the long sides and the short sides of the rectangular mask net is completed, the end weld areas of the two long sides of the rectangular mask net are welded in order, and then the end weld areas of the two short sides of the rectangular mask net are welded in order.

Further, the welding is laser spot welding.

Further, the rectangular mask net is made of Invar36, SUS304 or SUS 301.

Further, the thickness of the rectangular mask net is 100 μm or 150 μm or 200 μm.

The universal metal mask comprises a rectangular metal frame and a rectangular mask net, wherein the rectangular mask net is welded on the rectangular metal frame through a stretching net, a plurality of openings are formed in the rectangular mask net in an array mode, and the rectangular mask net is welded and fixed on the rectangular metal frame through the universal metal mask welding method.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:

(1) the invention relates to a universal metal mask welding method, which comprises the steps of positioning a peripheral net of a rectangular mask net on the upper surface of a rectangular metal frame, and welding and fixing the periphery of the rectangular mask net on the rectangular metal frame by adopting a spot welding process; the long sides and the short sides of the rectangular mask net are welded in a split mode, the central welding areas of the long sides and the short sides of the rectangular mask net are welded firstly, and then the welding areas of the corresponding end portions of the long sides and the short sides of the rectangular mask net are welded respectively, so that accumulated extrusion deformation caused by single-side continuous welding of the mask net is improved, and the welding position precision of the universal metal mask plate is improved; moreover, the welding method is simple and easy to implement, is convenient to implement, and provides a new idea for improving the manufacturing precision of the universal metal mask;

(2) according to the universal metal mask welding method, the central welding areas of the two long sides of the rectangular mask net are subjected to linear spot welding in sequence, then the central welding areas of the two short sides of the rectangular mask net are subjected to linear spot welding in sequence, and the long sides are welded and fixed, so that the mask net is positioned more accurately, and the integral position precision of the mask net is guaranteed;

(3) the invention relates to a universal metal mask welding method, wherein a welding line of an end welding area of a long side of a rectangular mask net is welded to two ends by taking a starting point or an end point of the welding line of a central welding area as a welding starting point; when the length of the short side of the rectangular mask net is longer, the welding line of the end welding area of the short side of the rectangular mask net is welded to the two ends by taking the starting point or the end point of the welding line of the central welding area as the welding starting point; welding is carried out from the central welding area to the two ends, so that the mask net is more smooth after being welded and fixed, and the manufacturing precision of the universal metal mask is further improved;

(4) the universal metal mask plate comprises a rectangular metal frame and a rectangular mask net, wherein the rectangular mask net is welded on the rectangular metal frame through a stretching net, a plurality of openings are formed in the rectangular mask net in an array mode, the rectangular mask net is welded and fixed on the rectangular metal frame through the universal metal mask plate welding method, the manufactured universal metal mask plate is higher in position accuracy, the mask net is not prone to being distorted, the high accuracy of the universal metal mask plate is guaranteed, and the quality of subsequent vacuum evaporation can be further guaranteed.

Drawings

FIG. 1 is a schematic view of a conventional universal metal mask (CMM) welding sequence;

FIG. 2 is a schematic view of a welding sequence of a universal metal mask according to the present invention;

FIG. 3 is a schematic diagram of the position accuracy detection of a universal metal mask according to the present invention;

FIG. 4 is a diagram showing the variation of the opening position accuracy of a mask net in a conventional general metal mask welding sequence;

FIG. 5 is a diagram showing the variation of the opening position accuracy of a mask net according to a general metal mask welding method of the present invention.

The reference numerals in the schematic drawings illustrate:

1. a rectangular metal frame; 2. a rectangular mask mesh; 2-1, opening.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

Referring to fig. 2, the general metal mask welding method of the present invention includes the following steps:

s1, positioning the peripheral meshes of the rectangular mask mesh 2 on the upper surface of the rectangular metal frame 1;

s2, welding and fixing the periphery of the rectangular mask net 2 on the rectangular metal frame 1 by adopting a spot welding process; wherein, include the following substeps:

s2-1, dividing the welding area of the long side and the short side of the rectangular mask net 2, and dividing each side of the rectangular mask net 2 into a central welding area and end welding areas positioned at two ends of the central welding area;

s2-2, dividing the welding area according to the step S2-1, firstly carrying out linear spot welding on the central welding areas of the long sides and the short sides of the rectangular mask net 2 in sequence, then respectively carrying out linear spot welding on the corresponding end welding areas of the long sides and the short sides of the rectangular mask net 2, wherein the welding line of each side end welding area of the rectangular mask net 2 takes the starting point or the ending point of the welding line of the central welding area of the corresponding side as the starting point or the ending point of welding;

s2-3, and completing the welding and fixing of the periphery of the rectangular mask net 2 on the rectangular metal frame 1 in sequence according to the step S2-2.

According to the welding method of the universal metal mask, the long sides and the short sides of the rectangular mask net are welded in a split mode, the central welding areas of the long sides and the short sides of the rectangular mask net are welded firstly, and then the corresponding end welding areas of the long sides and the short sides of the rectangular mask net are welded respectively, so that the accumulated extrusion deformation caused by single-side continuous welding of the mask net is improved, and the welding position accuracy of the universal metal mask is improved; and the welding method is simple and easy to implement, is convenient to implement, and provides a new idea for improving the manufacturing precision of the universal metal mask. The universal metal mask manufactured by the welding method is higher in position precision, the mask net is not easy to distort, the high precision of the universal metal mask is guaranteed, and the quality of subsequent vacuum evaporation can be further guaranteed.

The present invention will be further described with reference to the following examples.

[ examples ]

As shown in fig. 2, the general metal mask welding method of the present embodiment includes the following steps:

s1, positioning the peripheral meshes of the rectangular mask mesh 2 on the upper surface of the rectangular metal frame 1; the mesh-stretching process of the rectangular mask mesh 2 and the rectangular metal frame 1 is similar to the prior art and can be completed on the prior mesh-stretching equipment, and the details are not described herein; by means of mesh positioning, the rectangular mask mesh 2 can be accurately positioned on the rectangular metal frame 1, and subsequent welding operation is facilitated;

s2, welding and fixing the periphery of the rectangular mask net 2 on the rectangular metal frame 1 by adopting a spot welding process; specifically, the method comprises the following steps:

s2-1, dividing the welding area of the long side and the short side of the rectangular mask net 2, and dividing each side of the rectangular mask net 2 into a central welding area and end welding areas positioned at two ends of the central welding area; the central welding areas are positioned in the middle of each side of the rectangular mask net 2, the end welding areas are positioned at two ends of the corresponding central welding areas, preferably, the length of the central welding areas can occupy 1/4-1/3 of the length of the corresponding side of the rectangular mask net 2, and the central welding areas can be adjusted according to the size of the rectangular mask net 2;

s2-2, dividing the welding area according to the step S2-1, firstly carrying out linear spot welding on the central welding areas of the long sides and the short sides of the rectangular mask net 2 in sequence, and then respectively carrying out linear spot welding on the corresponding end welding areas of the long sides and the short sides of the rectangular mask net 2, namely firstly welding the central welding areas of all sides of the rectangular mask net 2, and then welding the end welding areas of all sides of the rectangular mask net 2; the welding line of the end welding area of each side of the rectangular mask net 2 takes the starting point or the end point of the welding line of the central welding area of the corresponding side as the starting point or the end point of welding, namely, when the end welding area is welded, the welding can be carried out from the center to the outer side, and also can be carried out from the outer side to the center, and the welding can be specifically determined according to the length size of each side;

s2-3, sequentially completing the welding and fixing of the periphery of the rectangular mask net 2 on the rectangular metal frame 1 according to the step S2-2, and forming the universal metal mask.

As shown in fig. 2, as a preferred embodiment, in step S2-2, the center lands of the two long sides of the rectangular mask mesh 2 are sequentially subjected to straight spot welding, and the center lands of the two short sides of the rectangular mask mesh 2 are sequentially subjected to straight spot welding. Namely, the welding of the central welding areas of the edges of the rectangular mask net 2 can be completed in sequence according to the sequence of → → the sequence of → the rectangular mask net 2, and the welding and fixing of the long edges are firstly carried out, so that the mask net is more accurately positioned, and the whole position precision of the mask net is favorably ensured. The spot welding lines of each central welding area are straight welding lines parallel to the corresponding side edges, each welding line is composed of welding points which are arranged at intervals, and the distance between every two adjacent welding points is preferably designed to be 1-2 mm. Further, in step S2-2, the welding line of the end welding area of the long side of the rectangular mask net 2 is welded to both ends with the start point or the end point of the welding line of the central welding area as the welding start point, that is, the sequence of welding is indicated by the arrow from the fifth to the sixth in fig. 2, which represents the welding direction, the welding is performed from the center to both sides, and the welding is performed from the central welding area to both ends, so that the mask net is more flat after being welded and fixed, and the manufacturing accuracy of the universal metal mask is further improved. The welding direction of the end welding zone of the corresponding short side of the rectangular mask net 2 can be determined according to the length of the end welding zone, when the length of the short side of the rectangular mask net 2 is longer, the welding line of the end welding zone of the short side of the rectangular mask net 2 is welded to two ends by taking the starting point or the terminal point of the welding line of the central welding zone as the welding starting point, namely the welding is carried out from the central welding zone to two ends; when the length of the short side of the rectangular mask net 2 is short, the influence of the welding direction on the accuracy of the welding position of the rectangular mask net 2 is small, and at this time, the welding sequence can also be ninthly toWelding in the direction of the central arrowNamely, the welding directions of the central welding area and the end welding area of the short side of the rectangular mask net 2 are kept consistent, so that the welding of the welding equipment is more convenient. In addition, it is further preferable that, after the welding of the center welding areas of the long sides and the short sides of the rectangular mask net 2 is completed, the end welding areas of the two long sides of the rectangular mask net 2 are welded in sequence, and then the end welding areas of the two short sides of the rectangular mask net 2 are welded in sequence, that is, the end welding areas of the long sides are welded in sequence according to the sequence of (c) → c → b in fig. 2, and then (c) → c in fig. 2→The welding of the end welding areas of the short sides is carried out in sequence, and the welding and fixing of the long sides of the rectangular mask net 2 are preferably guaranteed, so that the welding precision of the mask net is guaranteed.

In this embodiment, the welding is laser spot welding, which is firm and stable, and accurate and efficient. The rectangular mask net 2 is made of Invar36, SUS304 or SUS301, and Invar36 is a low-expansion iron-nickel alloy with an ultralow expansion coefficient; SUS304 is 304 stainless steel, and SUS301 is 301 stainless steel. The thickness of the rectangular mask net 2 is preferably 100 μm or 150 μm or 200 μm.

The invention also discloses a universal metal mask plate, which comprises a rectangular metal frame 1 and a rectangular mask net 2 welded on the rectangular metal frame 1 through a stretching net, wherein a plurality of openings 2-1 are arranged on the rectangular mask net 2 in an array mode, the rectangular mask net 2 is welded and fixed on the rectangular metal frame 1 through the universal metal mask plate welding method, the manufactured universal metal mask plate is higher in position precision, the mask net is not easy to distort, the high precision of the universal metal mask plate is guaranteed, and the quality of subsequent vacuum evaporation can be further guaranteed.

For a better understanding of the present invention and to further illustrate the technical effects thereof, reference is now made to the following comparative data.

FIG. 3 is a general gold after mesh weldingBelongs to a plane schematic diagram of a mask plate, a rectangular opening 2-1 arranged in each array on a mask net is taken as a detection unit, and four vertexes of the rectangular opening 2-1 use deformation amount coordinates (x) in sequence₁，y₁)、(x₂，y₂)、(x₃，y₃) And (x)₄，y₄) To reflect the position accuracy change of the rectangular mask net 2 after welding.

Fig. 4 and 5 are respectively the mask mesh opening position accuracy change data of the general metal mask manufactured by the general metal mask welding method of the present invention and the general metal mask welding sequence. The left graph is the X-axis position variation of each measuring unit, the right graph is the Y-axis position variation of each measuring unit, Cell-1, Cell-2, Cell-3 and Cell-4 respectively represent the columns of rectangular openings arranged in an array on the mask net in fig. 3, and Line1, Line 3, Line 5, Line 7, Line 9, Line 11, Line 13 and Line 15 respectively represent the rows of rectangular openings arranged in an array on the mask net in fig. 3. In the invention, partial rectangular openings on the mask net are selected for detection and comparison.

According to the data expression rule of the position accuracy (CPA) variation graph, as can be seen from fig. 4, in the conventional welding method (i.e., the single-side continuous welding method shown in fig. 1), the variation of the Y-axis coordinate of the corresponding rectangular opening 2-1 on the two long sides tends to increase significantly according to the welding direction (see the data variation in the dashed-line frame in fig. 4), but the variation of the position accuracy is not significant due to the short length of the short side, which means that in the single-side continuous welding method, due to the squeezing effect during the welding process, along with the accumulation of the forward squeezing, a larger variation of the position occurs at the end of the welding line, which results in the distortion of the mask mesh, especially, the long side with a longer dimension, and the variation of the position is more significant.

As can be seen from fig. 5, after the welding method of the present invention is adopted (i.e., the single-side split welding method shown in fig. 2), since the central region of the rectangular mask net 2 is welded and fixed first and both ends are welded, the length of each welding line is short, the welding extrusion effect is reduced, the position change of the rectangular mask net 2 is smaller, and it can be seen from the data change in the dotted line frame of fig. 5 that the position precision change of both long sides of the rectangular mask net 2 is well controlled, the position precision after welding is higher, and the phenomenon of excessive accumulated extrusion deformation during welding is eliminated. Through a large number of comparison tests, the welding method provided by the invention can reduce the variation of the position of the short side of the universal metal mask by 5 microns and reduce the variation of the position of the long side by 10 microns.

According to the welding method of the universal metal mask and the universal metal mask manufactured by the welding method, the long sides and the short sides of the rectangular mask net are welded in a split mode, the central welding areas of the long sides and the short sides of the rectangular mask net are welded firstly, and then the corresponding end welding areas of the long sides and the short sides of the rectangular mask net are welded respectively, so that the accumulated extrusion deformation caused by single-side continuous welding of the mask net is improved, and the welding position precision of the universal metal mask is improved; and the welding method is simple and easy to implement, is convenient to implement, and provides a new idea for improving the manufacturing precision of the universal metal mask. The position precision of the manufactured universal metal mask is higher, the mask net is not easy to distort, the high precision of the universal metal mask is guaranteed, and then the quality of follow-up vacuum evaporation can be guaranteed.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.