JP2006026766A - Side machining device for hard and brittle sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side machining device for hard and brittle sheet, characterized by a working fluid for the surface of a work and a washing means for chips to thereby reduce the quantity of washing water used and reduce the running cost of machining a work. <P>SOLUTION: Washing for the work surface after machining is locally performed, whereby the structure of a washing device is simplified and the quantity of washing water used is reduced. Further, the device is provided with a means for restraining the working fluid and chips from being diffused to the work central part, whereby the work surface can be effectively washed. A water nozzle 5 generating a water stream 5a flowing from the inside of the work side to the outside along the surface of the work side part is disposed on the downstream side of a tool 3 in the relative feeding direction of a table 1 to the tool 3, and an air nozzle 6 generating an air stream 6a flowing from the inside of the work side to the outside along the surface of the work side part is disposed further on the downstream side of the water nozzle. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a side processing apparatus for a hard brittle plate used for chamfering a side of a liquid crystal substrate, and more particularly to the above-described apparatus characterized by cleaning means for processing liquid and chips remaining on a workpiece surface after processing. Is.

  Liquid crystal panels used as display devices for personal computers, televisions, mobile phones, etc. are manufactured by forming multiple display devices in a matrix on a large-area glass plate and then cleaving the substrate into individual panel dimensions. ing. Since a sharp edge is formed on the end face of the cleaved substrate, the edge is chamfered with a rotating grindstone. When grinding a glass plate with a rotating grindstone, a working fluid (generally pure water) is required, and fine chips are also generated during processing. Since this processing liquid and chips adhere to the surface of the processed glass plate, it is necessary to wash it.

  FIG. 6 is a perspective view schematically showing an example of a conventional glass substrate chamfering apparatus provided with a cleaning device using a water flow and an air jet. The apparatus includes a table 1 that supports a glass substrate 2 that is a workpiece, and a rotating grindstone 3. By moving the table 1 relative to the grindstone 3 in the extending direction of the processing side 2 a of the workpiece, Perform chamfering of the side.

The machining fluid is supplied to the machining portion (the contact portion between the grindstone 3 and the workpiece 2) by the machining fluid nozzle 4. Most of the machining fluid is ejected to the outside of the machining portion by the rotating grindstone 3, but a part of the machining fluid remains on the surface of the workpiece 2, and a part of the chips generated by machining is also deposited on the workpiece surface together with the machining fluid. Adhere to. Therefore, in the apparatus shown in the figure, cleaning water is made to flow over the entire upper surface of the workpiece 2 by the cleaning device 13, and air is ejected in a film form from an air nozzle 8 called an air knife having a length larger than the width of the workpiece 2. The machining fluid and chips on the workpiece surface are removed.
JP 2003-312841 A

  In conventional side processing equipment, cleaning water is poured over the entire surface of the workpiece in order to remove the machining fluid and chips adhering to the workpiece surface during grinding. There has been a problem that the amount of consumption of pure water is large for cleaning the substrate, and the running cost (processing cost) becomes high. In addition, since the entire surface of the workpiece is cleaned with cleaning water, the cleaning device becomes large and the workpiece surface needs to be cleaned uniformly. Therefore, the accuracy required for the cleaning device is increased. There was a problem that the structure became complicated and the price was high.

  In the side processing apparatus for a hard and brittle plate, the present invention performs the cleaning of the work surface after processing locally, thereby simplifying the structure of the cleaning apparatus and reducing the amount of cleaning water used. It is a solution to the problem, and by providing a grindstone structure that can suppress the diffusion of machining fluid and chips to the center of the workpiece and a means to actively suppress the diffusion, it is effective to clean the workpiece surface. It is intended to be performed.

  That is, the side processing apparatus for a hard and brittle plate according to the first aspect of the present invention includes a tool 3 for processing a side of a work, a processing liquid supply device 4 for supplying a processing liquid to a work processing portion by the tool, In the side processing apparatus for a hard brittle plate that performs side processing by relative feed in the workpiece side direction of the table with respect to the tool, the tool 3 in the relative feed direction of the table 1 is provided. On the downstream side, a water nozzle 5 that generates a water flow 5a that flows from the inside of the side to the outside along the surface of the workpiece side, and further downstream of the water nozzle, on the surface of the workpiece side And an air nozzle 6 that generates an air flow 6a that flows from the inside of the side to the outside.

  Further, the invention of claim 2 of the present application is the side processing apparatus provided with the above-mentioned means, and further, the workpiece side side portion is located at a position substantially facing the inner tool 3 in the width direction orthogonal to the relative feed direction of the workpiece 2. A second air nozzle 7 that generates an air flow that flows from the inside to the outside of the side along the surface is arranged.

  The machining fluid and chips adhere to the surface of the side of the workpiece during machining, and the machining fluid and chips adhering to this portion flow through the downstream side immediately after the workpiece feed direction of the tool 3 with the water flow 5a. Since the washing water is also flowed to the outside of the side of the workpiece by the air flow 6a that continues to the outside of the side, the surface of the workpiece can be efficiently cleaned, and the amount of pure water required for cleaning This reduces the running cost.

  In particular, in the side processing apparatus including the upper and lower two rotating grindstones 3a and 3b that rotate in the direction from the inner side of the side to the outer side at the contact portion 2b with the workpiece 2 above and below the processing side 2a of the workpiece, Along with the rotation of the grindstones 3a and 3b, an air flow 10 that flows from the inside to the outside of the workpiece side is generated in the machining portion, and diffusion of machining fluid and chips to the center of the workpiece is suppressed. Since the chips remain on the side of the workpiece, the water nozzle 5 and the air nozzle 6 of the present invention enable effective cleaning of the workpiece surface.

  In the second aspect of the present invention, the air flow 11 from the second air nozzle 7 in the processing portion by the tool 3 is more actively prevented from diffusing the processing liquid and the chips into the work central portion. The work surface can be effectively cleaned by the water nozzle 5 and the air nozzle 6.

  In addition, since the cleaning area is smaller than that of a conventional apparatus that cleans the entire workpiece surface, the apparatus is small and simple in structure, and the apparatus itself can be provided at a lower cost.

  Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 are views showing an example of the most preferred embodiment of the present invention. FIG. 1 is a perspective view of a main part, and FIG. 2 is a work side edge part during chamfering processing on the downstream side in the work feed direction. FIG. 3 is a plan view showing the entire device arrangement and the direction of the water flow and air flow from the nozzle, and FIG. 4 is an enlarged partial cross-sectional view of the grindstone of the machining liquid supply portion and the machining liquid nozzle. 5 is the figure which looked at the machining liquid nozzle from the grindstone side.

  In the figure, 1 is a table, 2 is a work (glass substrate) sucked and held on the table 1 by vacuum pressure or the like, 3 is a grindstone unit for chamfering the work side 2a, 4 is a machining liquid nozzle, A washing water nozzle, 6 is an air nozzle, 7 is a second air nozzle, 8 is an air knife, and 9 is a conveyor for carrying out a workpiece.

  The grindstone unit 3, nozzles 4, 5, 6, air knife 8 and conveyor 9 are provided at fixed positions, and the table 1 and the workpiece 2 attracted and held by the table 1 are parallel to the workpiece side 2 a to be processed. Move in the direction of arrow A. During this movement, the upper and lower rotary grindstones 3a and 3b provided on the grindstone unit 3 come into contact with the upper and lower edges of the workpiece side 2a at an angle of approximately 45 degrees, and the edges are chamfered. At this time, the machining liquid (pure water) is supplied from the machining liquid nozzle 4 to the peripheral surfaces of the grindstones 3a and 3b.

  The upper and lower grindstones 3a and 3b rotate in the direction indicated by the arrow B in FIG. 2 so as to grind the edge of the workpiece side 2a from the inside to the outside, and the air flow 10 accompanying this rotation is shown in FIG. As shown, it flows from the inside to the outside of the workpiece side 2a. The upper and lower grindstones 3a, 3b shown in the drawing are each composed of three grind wheels fixed to one grindstone shaft 12a, 12b at an axial interval, and each of the three upper and lower grind wheels is provided. Alternatingly located at the distance between the grinding wheels. The workpiece 2 is supported with its side 2a protruding from the table 1, so that the lower grindstone 3b and the table 1 do not interfere with each other.

  The second air nozzle 7 is provided on the upper and lower sides of the workpiece 2 so as to face the upper and lower grinding stones 3a and 3b, and is secondly directed toward the contact portion between the upper and lower grinding wheels 3a and 3b and the workpiece side 2a. An air flow 11 is injected. As shown in FIG. 3, the second air flow 11 is injected in an oblique direction from the inside to the outside of the workpiece side 2 a and from the downstream side to the upstream side in the feed direction of the workpiece 2. Due to the action of the air flow 10 generated by the rotation of the grindstones 3a and 3b described above, the machining liquid supplied to the machining portion of the workpiece side 2a and the chips generated in the machining portion are moved from the inside to the outside of the workpiece side 2a. Is prevented from diffusing into the center of the workpiece.

  The second air nozzle 7 provided in the illustrated apparatus positively applies an air flow 11 that flows from the inside to the outside of the workpiece to the workpiece machining portion, so that the machining fluid and chips diffuse in the center of the workpiece. This prevents the working fluid and chips from adhering to the workpiece 2 to stay in a narrow range on the side of the workpiece.

  On the downstream side in the workpiece feeding direction of the grindstone 3, a water flow 5 a and an air flow 6 a that flow from the inside of the workpiece to the outside along the upper and lower surfaces of the workpiece 2 are generated above and below the workpiece 2 on the inner side from the workpiece side 2 a. The water nozzle 5 and the air nozzle 6 are arranged in this order with the jet nozzles 5b, 6b facing the workpiece side.

  The arrangement position of the water nozzle 5 and the air nozzle 6 is a position where the entire portion where the machining fluid or chips on the side of the workpiece may adhere can be washed with the water flow 5a, for example, when the second air nozzle 7 is not provided. Since the adhesion area of the machining fluid and chips is widened, the arrangement position of the water nozzle 5 is a position retracted inward in the workpiece width direction (width direction viewed from the feed direction). The air nozzle 6 serves to remove the washing water flowing out from the water nozzle 5 from the workpiece surface, and is disposed at a position inside the workpiece width direction downstream of the water nozzle 5 in the workpiece feeding direction.

  In the illustrated apparatus, an air knife 8 similar to the conventional apparatus is disposed further downstream of the air nozzle 6 in the workpiece feeding direction. This is because the workpiece 2 is unloaded from the side processing apparatus to the conveyor 9. In order to ensure the removal of water on the front and back surfaces, what is provided in the conventional apparatus is provided as it is.

  4 and 5 show a structure for supplying a working fluid to the grindstone 3 used in the above embodiment. As shown in the figure, the machining liquid nozzle 4 has a plurality of arcuate recesses 4a in which the circumferential surface of the grindstone 3 is fitted with a gap so as to face a plurality of grindstone wheels (three in the figure). The nozzle hole 4b for supplying the machining fluid is opened at the bottom of the recess. The machining fluid that flows out from the nozzle hole 4b passes through a gap formed between the wall surface of the recess 4a and the outer peripheral surface of the grindstone 3, and is attached to the peripheral surface of the grindstone 3 to the workpiece machining portion. Be transported. By using the structure illustrated in FIGS. 4 and 5 as the structure of the machining liquid supply nozzle to the grindstone 3, the machining liquid scatters due to the collision between the machining liquid flowing out from the nozzle hole 4b and the rotating grindstone peripheral surface. This prevents the machining fluid from diffusing into the center of the workpiece more effectively.

  Next, the operation of the embodiment apparatus having the above configuration will be described. The upper and lower grindstones 3a and 3b rotating toward the side 2a of the workpiece to be machined chamfer the side 2a by moving the workpiece 2 in the direction of the side 2a. At this time, most of the machining liquid supplied to the machining unit and the chips generated in the machining unit are processed by the air flow 10 accompanying the rotation of the grindstone and the second air flow 11 ejected from the second air nozzle 7. However, a part adheres to the workpiece | work surface of a workpiece | work side edge part.

  Since the water nozzle 5 and the air nozzle 6 are also provided at fixed positions, the side portion of the workpiece that has passed through the grindstone unit 3 portion is cleaned by the water flow 5a when it reaches the position where the water nozzle 5 is disposed. When the arrangement position of the nozzle 6 is reached, the cleaning water adhering to the workpiece surface is removed by the air flow 6a. Then, the upper and lower surfaces of the work 2 are air-washed by the film-like air flow ejected from the air knife 8 when the processed work is carried out from the table 1 to the carry-out conveyor 9.

  The grindstone unit 3 needs to be moved in the workpiece width direction according to the width dimension of the workpiece 2. At this time, the water nozzle 5, the air nozzle 6, and the second air nozzle 7 are also arranged in the width direction of the grindstone unit 3. Move in the width direction according to the amount of movement. That is, in an actual apparatus, the grindstone unit 3, the water nozzle 5, the air nozzle 6, and the second air nozzle 7 may be provided on the grindstone side frame whose position can be adjusted according to the width of the workpiece.

The perspective view of the principal part of an Example apparatus View of workpiece side edge during chamfering viewed from downstream of workpiece feed direction Plan view showing overall equipment layout and water and air flow from nozzles Enlarged partial sectional view of the processing fluid supply part to the grinding wheel A perspective view of the machining fluid nozzle as seen from the grinding wheel side Diagram showing an example of a conventional device

Explanation of symbols

1 Table 2 Work 3 Wheel unit (tool)
4 Processing liquid nozzle 5 Washing water nozzle 6 Air nozzle 7 Second air nozzle

Claims (2)

A tool for machining the side of the workpiece (3), a machining fluid supply device (4) for supplying a machining fluid to a workpiece machining section by the tool, and a table (1) for placing the workpiece, a table for the tool In the side processing apparatus for a hard brittle plate that performs side processing by relative feeding in the workpiece side direction,
On the downstream side of the tool (3) in the relative feed direction of the table (1), a water nozzle (5a) that generates a water flow (5a) that flows from the inside of the side to the outside along the surface of the side of the workpiece. ) And an air nozzle (6) that generates an air flow (6a) that flows from the inside of the side to the outside along the surface of the side of the workpiece on the further downstream side of the water nozzle. An apparatus for processing a side of a hard brittle plate, characterized in that:   An air flow that flows from the inside of the side of the workpiece (2) to the outside along the surface of the side of the workpiece at a position substantially opposite to the inner tool (3) in the width direction perpendicular to the relative feed direction of the workpiece (2). The side processing apparatus according to claim 1, characterized in that a second air nozzle (7) to be generated is arranged.

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