JP2003225868A - Multiple grinding wheel for reciprocating work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for a multiple grinding wheel capable of performing reciprocating grinding work, a reciprocating grinding method using the multiple grinding wheel, and a processing device for grinding four sides of a rectangular plate member. <P>SOLUTION: In this multiple grinding wheel, a plurality of single grinding wheel plates are disposed in parallel at prescribed intervals, and a subject plate member is relatively moved to slide roughly in parallel to the rotation axis direction of the multiple grinding wheel to be provided in order for the grinding work. The outer diameter size of a single grinding wheel plate 42 on the center side is set to be larger than the outer diameter size of the single grinding wheel plates 41 and 43 disposed on the right and left of it, so that a ground surface formed when the subject plate member 7 is relatively moved forward and a ground surface formed when the subject plate member is relatively moved backward are respectively formed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-grinding stone structure capable of reciprocating grinding in grinding a square plate material such as a liquid crystal substrate or a glass plate with a grindstone, and a method of reciprocating grinding a square plate material using this multi-grinding stone. And its processing equipment.

[0002]

2. Description of the Related Art A rectangular plate material such as a liquid crystal substrate or a glass plate is conventionally chamfered by grinding in order to prevent chipping or cracking from the edge. In this chamfering process, as shown in FIG. 6, a multi-grinding stone is used in which a plurality of grindstone veneers are arranged in parallel at a predetermined interval so as not to cause grinding burrs and pitching on the work plate material.

An example of the grinding method will be described by taking the multi-grinding stone 104 composed of three monolithic grinding stones of the same size shown in FIG. 6 as an example. The rotation axis of the multi-grinding stone is slidably arranged with a slight inclination angle with respect to the moving direction of the rectangular plate material.
For example, when the chamfering allowance is 0.1 to 0.2 mm, the deviation amount between the grindstone veneers at both ends is set to about 0.1 mm. When the work plate material 7 is moved substantially parallel to the rotation axis of the multi-grinding wheel (moving from bottom to top in FIG. 6), first, the grinding allowance a1 is ground by the first grindstone veneer 104a, then , The next grinding allowance a2 is ground by the second grindstone single plate 104b, and the next grinding allowance a3 is further ground by the third grindstone single plate 104c. In this way, a predetermined grinding allowance is obtained by performing stepwise grinding with a plurality of grindstone single plates.

However, in the conventional grinding method as described above, the work plate material can be moved and ground only in one direction as described with reference to FIG. Therefore, when chamfering the rectangular plate member 7 as shown in FIG. 7 using this conventional multi-grinding stone, the following steps had to be taken. As shown in FIG. 7A, a square plate member is placed on the table 103 and moved forward. At this time, two sets of multi-grinding stones, one set of which the multi-grinding stones 104 and 105 are in sliding contact with each other from both the front surface side and the back surface side of the square plate material, are arranged on both sides of the square plate material. ing. In this way, when the square plate material is moved forward and the grinding is finished, it cannot be moved back as it is. Therefore, as shown in Fig. 7 (b), once move the two sets of multi-grinding stones on both sides to the retracted escape point. , Retreat the square plate to its original position. After that, as shown in Fig. 7 (c), the square plate material is turned by 90 °, the two sets of multi-grinding stones are moved and adjusted to the processing position, the square plate material is again moved forward, and the remaining both sides are ground. Was there.

[0005]

SUMMARY OF THE INVENTION In view of the above situation, the present invention provides a multi-grinding stone capable of reciprocating processing, in which a square plate material is moved forward and then rotated by 90 ° and retracted to form a square plate material. It was obtained by carefully studying the multi-grinding stone structure, focusing on the ability to chamfer four sides.

Therefore, it is an object of the present invention to provide a multi-grinding stone structure capable of reciprocating grinding, a reciprocating processing method using the multi-grinding stone, and a machining apparatus therefor in the grinding of four sides of a rectangular plate material.

[0007]

The invention according to claim 1 is
For the purpose of providing a multi-grinding wheel for reciprocating grinding, a plurality of grindstone veneers are moved in relative sliding contact with the work plate material substantially parallel to the rotation axis direction of the multi-grinding wheels arranged in parallel at a predetermined interval. , In a multi-grinding stone that is used for grinding that sequentially grinds, by making the outer diameter dimension of the central-side grindstone veneer larger than the outer diameter dimension of the grindstone veneers arranged on the left and right, the work plate material moves forward It is possible to form a grinding surface formed when moving and a grinding surface formed when the plate material moves backward relative to each other.

The term "relative movement" as used herein means that either the work plate material or the multi-grinding stone, or both, move and the sliding contact surface moves forward or backward relatively. Also,
"Making the outer diameter of the central grinding wheel veneer larger than the outer diameter of the grinding wheel veneer placed on the left and right" does not necessarily mean that the central grinding wheel veneer is symmetrically configured. Means that. That is, if the grindstone veneer is symmetrically configured toward the left and right ends around the central whetstone veneer, almost the same grinding surface is obtained by the forward movement and the backward movement of the work plate material, but the left end grindstone If the outer diameter of the veneer is different from the outer diameter of the whetstone veneer at the right end, the grinding allowance can be changed by the forward movement and the backward movement of the work.

According to a second aspect of the present invention, by using the multi-grinding stone of the first aspect, a pair of upper and lower multi-grinding stones are set so that the ridge corner portions of one side of a square work plate material are slidably contacted from above and below, respectively. Reciprocating grinding machine in which two sets of multi-grinding stones are arranged in a gate structure so as to slidably contact the ridge corners of both sides of the square work plate material, and the work plate material can be reciprocated between them. Is what you get.

According to a third aspect of the present invention, by using the multi-grinding stone of the first aspect, a pair of upper and lower multi-grinding stones are set so that the ridge corners of one side of a square work plate material are slidably contacted from above and below, respectively. , And two sets of multi-grinding stones are arranged in a gate structure so as to be in sliding contact with the ridge corners of both sides of the square work plate material, and the work plate material is advanced in the meantime to set the parallel sides of both sides. A reciprocating grinding method in which grinding is performed, then the work plate material is turned by 90 °, two sets of multi-grinding stone intervals are adjusted according to the width of the rotated work material product, and then the work piece is retracted to grind the remaining parallel sides. Is what you get.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a structural example of a multi-grinding stone according to the present invention. The outer diameter of the central grindstone veneer 42 is larger than the outer diameter of the left and right grindstone veneers 41 and 43 (the outer diameter difference is shown large for the sake of clarity). 1 shows an example of a multi-grinding stone composed of three grindstone veneers, the number of grindstones can be arbitrarily selected and used according to the number of grinding steps and grinding allowance. In addition, it is not always necessary for the single grinding stone veneer in the central portion having the largest outer diameter to be one piece. For example, as in the multi-grinding stone 6 shown in FIG.
The center side grindstone veneers 42a and 42b may have the same size, and the left and right whetstone veneers 41 and 43 may be smaller than that.

An example of grinding the ridge corner portion of a rectangular plate material using the above-described multi-grinding stone according to the present invention will be described with reference to FIG. 2A shows the case where the plate material 7 is advanced (moved from bottom to top in the figure).
(B) shows the case of moving backward (moving from top to bottom in the figure). In the case of forward movement, the grinding allowance A1 is ground by the grindstone veneer 41, and the grinding allowance A is performed by the next grindstone veneer 42.
2 will be ground. On the other hand, in the case of backward movement,
The grinding allowance A1 is ground by the grindstone veneer 43, and the grinding allowance A2 is ground by the next center portion side grindstone veneer 42. FIG. 3 shows this relationship from the cross-sectional direction of the plate material to be cut.
The upper multi-grinding stone 4 is rotating from the front surface side 7a of the work plate material 7 toward the end face side 7c, and the lower multi-grinding stone 5 (51, 52, 53) is, on the contrary, the back surface of the work plate material. Side 7b
To the end face side 7c.

FIG. 5 shows an example of a processing apparatus and a processing method for grinding a ridge corner portion of a rectangular plate material such as a liquid crystal substrate using the multi-grinding stone according to the present invention. Reciprocating grinding machine 1
On the table 2, a work placing and holding device 3 for the square plate 7 is provided. The work placement / holding device is movable and rotatable in the Y-axis direction. An upper multi-grinding stone 4R and a lower multi-grinding stone 5R are provided as a pair of upper and lower on the right side in the forward direction on the table.
On the other hand, on the left side in the forward direction of the table, an upper multi-grinding stone 4L and a lower multi-grinding stone 5L are provided in an upper and lower pair, and two pairs of these left and right grindstones are arranged in a gate structure in the Z-axis direction and the X-axis direction. The position can be adjusted. Figure 5
As shown in (a), the work plate material 7 is moved forward, whereby the ridge corners on both sides are ground by the multi-grinding stone. The work plate material 7 that has completed the advancement turns 90 °, and the positions of the left and right multi-grinding stones are adjusted during that time, and the work plate material 7 only moves backward to grind the ridge corners of the remaining parallel sides.

[0014]

According to the present invention, in a multi-grinding stone composed of a plurality of grindstone veneers, the outer diameter of the grindstone veneer on the central portion side is made larger than the outer diameter of the grindstone veneer on the left and right sides thereof. Different grinding surfaces (grinding lines) can be formed on both sides of the whetstone veneer on the side, and reciprocating processing becomes possible. A set of such multi-grinding stones made up and down as a pair,
By arranging two sets in the shape of left and right gates, it is possible to grind the four sides of the square plate simply by moving the square plate forward and backward. Therefore, it is possible to eliminate the conventional steps of retracting and moving the multi-grinding stone and moving the square plate material back to the original position each time, and the machining tact can be shortened by that much, thus dramatically improving productivity. To do.

[Brief description of drawings]

FIG. 1 shows a structural example of a multi-grinding stone according to the present invention.

FIG. 2 shows a grinding state by a multi-grinding stone according to the present invention.

FIG. 3 shows a cross-sectional state of a work plate material.

FIG. 4 shows another example of the multi-grinding stone according to the present invention.

FIG. 5 shows a schematic diagram of the main configuration of a grinding apparatus 1 according to the present invention.

FIG. 6 shows an example of grinding with a conventional multi-grinding stone.

FIG. 7 shows an example of a conventional grinding apparatus.

[Explanation of symbols]

1 reciprocating grinding machine 2 tables 3 Work placement holder 4 (4R, 4L) Upper side multi-grinding stone 5 (5R, 5L) Lower side multi-grinding stone 6 multi grindstone 7 Square plate (work plate)

Claims (3)

[Claims] 1. A grinding process in which a plurality of grindstone veneers are successively slid to each other by relatively slidably moving a work plate material substantially parallel to the rotation axis direction of a multi-grinding wheel arranged in parallel at a predetermined interval. In the multi-grinding stone to be used for, by forming the outer diameter dimension of the central portion side grindstone veneer larger than the outer diameter dimension of the grindstone veneer arranged on the left and right thereof, it is formed when the work plate material moves forward relative to each other. A reciprocating multi-grinding stone capable of forming a grinding surface and a grinding surface formed when a plate material moves backward relative to each other. 2. The multi-grinding stone according to claim 1, wherein a pair of upper and lower multi-grinding stones are arranged so that the ridge corners of one side of a square work plate material are slidably contacted from above and below, respectively.
A reciprocating grinding apparatus characterized in that two sets of multi-grinding stones are arranged in a gate structure so as to slidably contact the ridge corners on both sides of the square work plate material, and the work plate material can be reciprocated between them. . 3. The multi-grinding stone according to claim 1, wherein a pair of upper and lower multi-grinding stones are arranged so that ridge corner portions of one side of a square work plate material are slidably contacted from above and below, respectively.
Two sets of multi-grinding stones are arranged in a gate structure so as to slide on the ridge corners on both sides of the square work plate material, and the work plate material is advanced between them to grind parallel sides of both sides, and then A reciprocating square plate material characterized by rotating the plate material 90 °, adjusting the distance between two sets of multi-grinding stones according to the width of the rotated plate material, and then retreating to grind the remaining parallel sides. Grinding method.