KR100683983B1 - Device and method electrolytic deburring of thin plate material for a shadow mask - Google Patents

Abstract

The present invention is an electrolysis deburring apparatus for a substrate, which is a shadow mask and an electronic component, which is a core component of a display device, and an apparatus for removing burrs by electrolysis for micropores of several to several tens of micro-lasers subjected to laser processing. These devices are machined into laser, 30-300 μm round, square, strip (strip) sheets of 0.01-0.2 mm thick invar alloy and stainless steel sheets, and then The electrolysis device is configured to efficiently deburr the generated burrs in a short time.

Electrolysis, electrolyte, deburring, shadow mask.

Description

Device and method electrolytic deburring of thin plate material for a shadow mask}

1 is a view showing the configuration of the electrolytic deburring apparatus of the thin plate material for the shadow mask according to an embodiment of the present invention.

FIG. 2 is a side view of the deburring device shown in FIG. 1. FIG.

3A and 3B illustrate an electrolytic deburring process according to the present invention.

The present invention relates to an electrolytic deburring apparatus for a substrate, which is a shadow mask and an electronic component, which are core components of a display device, and more particularly, removes burrs by electrolysis for micropores of several to several tens of micro-holes subjected to laser processing. It relates to a device to.

As is well known, as a method of removing burrs generated after laser processing and shearing of stainless or alloy materials, burrs are removed using a brush or ultrasonic cleaning is used to remove burrs.

The method using the brush may damage the shadow mask and the substrate, which is a thin thin plate material, and the method using the ultrasonic cleaning method has a disadvantage in that the removal rate of the burr is significantly decreased.

Accordingly, an object of the present invention for solving the above problems is to provide an electrolytic deburring apparatus for thin plate material for shadow mask that can effectively remove burrs without damaging the thin plate.

In addition, another object of the present invention is to improve the processing efficiency by electrolytic deburring while moving the electrode in the scanning method for the substrate, which is a shadow mask and an electronic component, a shadow mask to enable effective electrolytic deburring for the entire sheet material It is to provide an electrolytic deburring device for sheet metal material.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

DETAILED DESCRIPTION In the following detailed description, one representative embodiment of the present invention is set forth in order to achieve the above technical problem. And other embodiments that can be presented with the present invention are replaced by the description in the configuration of the present invention. Like reference numerals in the drawings refer to like elements.

First, in the present invention, the Invar alloy sheet and stainless sheet material having a thickness of 0.01 to 0.2 mm are processed in the form of a round, square, strip (strip steel sheet) having a size of 30 to 300 μm with a laser, and then the processed surface. An electrolytic deburring apparatus is proposed to enable efficient deburring of burrs generated on the back side in a short time.

That is, the deburring apparatus of the present invention performs electrolytic deburring while the electrode moves up / down, left / right, the workpiece is fixed by a dedicated chucking system, and the controller and sensor for automatic transfer of the electrode move the electrode. Is in charge of and control. The copper electrode having a width of 40 mm performs electrolysis deburring while moving slowly from right to left, and the electrolyte circulates through the electrolyte tank and the electrolyte tank to enable efficient electrolysis deburring.

In addition, the present invention selects the optimum processing parameters for electrolysis deburring after laser processing of the substrate of the shadow mast and thin plate material, and the optimum electrolysis conditions of stainless steel or alloy material for the electrolysis deburring process. And the optimum processing conditions are selected in consideration of the current characteristics according to the characteristics of various materials and thin plates. At this time, the electrolytic solution selects an electrolytic polishing liquid of a mixed solution such as phosphoric acid, sulfuric acid, purified water, and enables recycling through continuous filtering to enable high efficiency ultra-precision polishing of shadow masks and thin plate substrates.

On the other hand, in the form and transfer of the electrode, the processing variables are the movement speed of the electrode, the size, thickness, and material of the electrode. In this process, the workpiece is fixed by the chucking system and the processing is performed by the left and right movement of the electrode. The speed of movement of the electrodes is an important factor in processing.

In the electrolytic deburring process, processing variables include current density and characteristics, electrolytic processing time, distance between workpiece and electrode, electrolyte characteristics, and surface roughness of the preprocessing.

In the aforementioned electrolytic deburring process, the composition of the electrolyte is mixed in the ratio of phosphoric acid: sulfuric acid: distilled water = 5: 3: 2, the temperature of the electrolyte is 60 ~ 70 ℃, the current density (Current Density) Is the current density of 0.2 ~ 1.0A / cm2, and the processing time (speed) is about 1cm / sec for processing while the electrode for electrolysis deburring moves left and right, and the distance between the workpiece (stainless steel sheet) and the electrode is about 2mm. .

Therefore, such a deburring device can remove the burrs of the shadow mask component material and the electronic substrate and improve the thin plate quality, and it is possible to improve the extreme corrosion resistance by improving the surface accuracy, removing the dirt and forming the oxide film. In addition, the present invention relates to a polishing apparatus using an electrolysis process of an Inva alloy thin plate or a stainless alloy material, and employs a high-efficiency electrolytic polishing liquid to activate the electrolytic reaction even in a low current density environment, thereby improving corrosion resistance while achieving high efficiency mirror surface in a short time. You can.

Hereinafter will be described in detail based on the preferred embodiment of the present invention, the present invention is not limited by the embodiment.

Example 1

1 and 2 are views showing the configuration of an electrolytic deburring apparatus for effective removal of burrs after fine laser processing. Referring to FIGS. 1 and 2, the exhaust duct 10 is a duct for extracting gas generated during electropolishing from an electrolyte containing sulfuric acid and phosphoric acid, and is coated with fiber reinforced plastic (FRP) to prevent corrosion on stainless steel. Treatment was carried out. The upper and lower transfer unit 12 is made of aluminum and stainless steel, the electrolytic polishing electrode 40 is attached to the transfer bar 12a of the transfer unit 12, the electrolytic polishing electrode 40 up / down It serves to move in the direction. At this time, the movement distance of the electrolytic polishing electrode 40 is preferably at most 800mm.

The clamp jig 14 is a device for fixing the workpiece 44 to be electropolished to the clamp 16, and is combined with screws that can be tightened with a hexagonal wrench. The clamp 16 is made of a titanium material resistant to corrosion and low in electrical conductivity, and serves to maintain a constant position of the workpiece 44.

The electrolyte tank 18 was coated with FRP to prevent corrosion of stainless steel material, and is installed at the bottom to circulate the electrolyte for smooth circulation of the electrolyte. The caster 20 has a wheel for convenience of movement and is a structure to prevent movement by tightening the screw when fixed.

The electric control device 22 is a control device that allows only the necessary parts to be processed as needed when performing electrolytic polishing in the present invention. Basically three steps can be performed towards the parallel feed and three steps towards the vertical feed, which can be flexibly changed by the attachment of additional sensors and the conversion of the control device program. Rectifier 24 is a power supply for supplying a current required for electrolytic polishing. General DC power supply and pulse power supply can be used, and it is a large capacity supply device that can supply power up to 100A.

The feed gear motor 26 is a motor having a rated capacity of 25 W and is installed in the above-described upper and lower transfer units 12 to adjust the speed according to the shift of gears during left / right movement and up / down movement of the electrolytic polishing electrode 40. . Cover bellows 28 is formed of a plastic corrugated material to prevent vertical movement and corrosion of the sensor device is covered on the above-mentioned upper and lower transfer unit 12.

The up and down linear bearings 30 and the left and right linear bearings 32 are hard-plated bearing units, and are installed in the upper and lower transfer units 12 to realize the required feeding accuracy.

The electrolyte filter 34 is a filter that is connected to the electrolyte tank 18 to filter out impurities having a size of 1 μm to 10 μm mixed in the electrolyte, and the chemical pump 36 processes the electrolyte of the electrolyte tank 18 upwardly. It is a pump for raising to the electrolyte tank 38 for.

The electrolyte tank 38 is a tank in which the workpiece 44 and the electropolishing electrode 40 for actual processing are located and the electrolyte is supplied, and the electrolyte is supplied by the chemical pump 36 from the electrolyte tank 18 to perform electropolishing. The process will be carried out.

Electrolytic polishing electrode 40 is a dedicated electrode manufactured using a copper material of 99% or more for electrolytic polishing, the size or shape of the electrode may vary depending on the product to be processed. Confirmation window 42 is installed in the electrolyte bath 38 to visually check whether the electrolytic polishing process and the electrode transfer is properly performed, using a PVC material to prevent corrosion to the electrolyte and the thickness is about 10mm To increase the durability.

Hereinafter, an electrolytic deburring method for effective removal of burrs according to the present invention will be described in detail with reference to FIGS. 3A and 3B.

First, as shown in Figs. 3A and 3B, the workpiece (the thin plate material subjected to the laser hole and the pattern processing) 44 is chucked in the electrolytic bath 38, and the electrolytic polishing electrode 40 is placed behind it. The electrolytic polishing electrode 40 is moved up / down, right / left by an automatic program to electrolytic deburring a desired portion of the workpiece 44. In this case, the distance between the workpiece 44 and the electrolytic polishing electrode 40 is preferably about 2 mm, and the power supplied from the outside is switched on only when electrolytic deburring.

In addition, the electrolytic deburring connects the workpiece 44 to the (+) pole in the electrolyte, and connects the electrolytic polishing electrode 40 made of copper with a small electrical resistance to the (-) pole and passes the current through the workpiece 44. It dissolves the protrusions, ie burrs, into a smooth and glossy surface.

This is because a highly viscous oxide film generated during processing covers the fine valleys (or grooves) on the surface and prevents the dissolution of the portions, and electrolytic polishing is performed by selective dissolution of the acid (or protrusion) portions where the current density is concentrated. It is a metal polishing method which can obtain a smoother surface.

Electrolytic deburring causes the work piece 44 to be an anode in a specific electrolyte solution as shown in FIG. 3B and the cathode is close to the surface of the electrolytic polishing electrode 40 (that is, 2 mm), thereby eluting ions from the anode to cause selective dissolution of the protrusion. It is processing method to do.

The purpose of using electrochemical deburring can be expected to obtain an excellent surface such as smoothing, glossing, corrosion resistance and the like and effective dropping of burrs. In addition, during electrolytic polishing, a thin oxide film, a passivation film, is formed on the surface of the metal, thereby greatly increasing the corrosion resistance. In addition, it is possible to control the deburring as much as desired so that the processing capability is flexible, and the automatic system can be built to effectively perform this machining process.

As described above, the present invention is an apparatus in which an effective electrolytic deburring process is performed through a moving electrode, which makes it possible to improve the quality of the final product, secure processing efficiency, and efficiently perform mass production.

In addition, the present invention by selecting the optimum electrolytic processing parameters of the electrolytic deburring to effectively remove the burrs after laser processing for the shadow mask and thin plate material to obtain a high-quality high-precision shadow mask and thin plate substrate There is a synergistic effect.

Claims (5)

In the electrolysis deburring apparatus of the thin plate material for shadow mask, Electrolytic polishing electrode 40 made of copper material of 99% or more is installed for electrolytic polishing, and the electrolytic polishing electrode 40 is transported to adjust the speed according to the gear shift during the left / right movement and up / down movement A vertical transfer unit 12 provided with a geared motor 26; An electrolyte tank 18 containing an electrolyte solution and installed below the deburring device for circulation of the electrolyte solution; An electrolyte filter 34 connected to the electrolyte tank 18 to filter out impurities having a size of 1 μm to 10 μm mixed in the electrolyte and the electrolyte of the electrolyte tank 18 to the electrolyte tank 38 for upward processing. A chemical pump 36 for transferring; The workpiece 44 and the electrolytic polishing electrode 40 for actual processing are located, and the electrolytic solution is supplied from the electrolytic solution tank 18 by the chemical pump 36 to the electrolytic bath 38 for the electrolytic polishing process. Electrolysis deburring device of the thin plate material for the shadow mask, characterized in that configured. The method of claim 1, Electrolyte deburring apparatus for the thin plate material for the shadow mask, characterized in that the electrolyte tank 18 and the electrolyte tank 38 is coated with a fiber-reinforced plastic. delete delete delete

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