JP3247255B2 - Fine processing thin plate dividing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for dividing a finely processed thin plate such as a shadow mask or a lead frame used as a part of an electronic device, and more particularly, to a method of stacking a plurality of processed thin plates and simultaneously forming a plurality of required thin plates. The present invention relates to an apparatus for dividing a finely processed thin plate for dividing a portion and removing an unnecessary portion therebetween.

[0002]

2. Description of the Related Art First, a conventional method for dividing a finely processed thin plate will be described. FIG. 9 shows fine patterns 11, 11,..., 11 of shadow masks on a continuous metal thin plate.
(Hereinafter referred to as a required part.)
2 (hereinafter, referred to as an unnecessary portion), a part of the portion processed continuously in a row is shown, and a connection state between a required portion 11 and an unnecessary portion 12 in a peripheral portion thereof is shown, and FIG.
FIG. 3 is a diagram of the peripheral contour of the required portion 11 as viewed from the surface in a state where the contour is processed to half of the plate thickness (hereinafter, referred to as a half cut). Similarly, FIG. 10 shows a back surface and a partial cross section of the metal plate of FIG. However, P in FIG. 10 is a rear view in a half-cut state, Pa is a cross-sectional view taken along the line AA in the rear view P, and Pb is a cross-sectional view taken along the line BB in the rear view P.

FIG. 11 is an explanatory view showing an example of a continuously processed metal plate of a lead frame. In the case of this example, the required portion 13 is spot-fixed to the unnecessary portion 14 at the periphery thereof at almost the same external appearance. FIG.
, Q is a surface view showing a part thereof, and Qc is an enlarged view of a portion C of the surface view Q surrounded by a dotted circle. Note that the two-dot chain line in FIGS.
The cutting position before cutting the (or 14) from the periphery of the mask 11 (or 13) is shown.

In the case of a television having a relatively large screen, the pattern is arranged in a row on a continuous long metal plate as shown in FIG. 9, but in the case of a display of a relatively small personal computer, FIG. As shown, two sets of required parts 21 and 22 are often arranged as a set. Unnecessary portions 23 and 24 are removed from such a metal plate to remove required portions 21, 22, 21 and 22 of the shadow mask.
... To take out 21 and 22 one by one,
After cutting at the cutting position indicated by the two-dot chain line in the figure,
As shown on the left side of FIG. 13, the peripheral unnecessary portion 23 is manually separated from the half-cut or dot-fixed (partial connection) portion, as shown on the right side of FIG.
A two-piece pattern 30 sandwiching the unnecessary portion 24 therebetween is provided.

[0005] Next, as shown on the left side of FIG. 14, a plurality of two-piece patterns 30, 30... Pressing the upper side by the pressing plate 26 and bending one side manually are repeated a plurality of times, and the part to be cut off is subjected to metal fatigue and divided. Further, as shown on the right side of FIG. 14, the required portion 22 connected to the connection portion 24 is fixed, and the connection portion is sequentially peeled from the upper portion and separated, and divided into a single shadow mask (required portions 21 and 22). Was.

[0006]

However, in the above-mentioned conventional manual dividing method, the work is extremely hard physically, and furthermore, a defective product may be produced at the time of bending.
There is a problem that the mental burden on the worker is large and the working efficiency is poor.

An object of the present invention is to solve the above-mentioned problems and to provide an apparatus for dividing a finely processed thin plate that efficiently cuts without producing defective products.

[0008]

In order to solve the above-mentioned problems, a first solution of the apparatus for dividing a micromachined thin plate according to the present invention is to provide a required portion 21 of a micromachined thin plate to be left.
In a finely processed thin plate dividing apparatus for dividing a divided material in which an unnecessary portion 24 is connected by a partial connecting line into the required portion and the unnecessary portion, a divided material in which a plurality of the divided materials are stacked and placed. Mounting bases 1 and 2, required part clamp portions 3 and 4 arranged on the divided material mounting base to clamp and hold at least a part of the required part of the divided material, and the unnecessary part of the divided material Unnecessary portion clamp portion 5, which clamps and holds at least a part of
6, and a swing portion (built-in to 9) for swinging the unnecessary portion clamp portion around an axis parallel to the longitudinal direction thereof.

According to a second aspect of the present invention, in the dividing device for finely processed thin plate according to the first aspect, tension generating portions 7a, 7b, 8a for applying tension in a direction in which the required partial clamp portion is separated from the unnecessary partial clamp portion. , 8b. A third solution is that in the dividing device for finely processed thin plate according to the first or the second solution, the unnecessary portion clamp portions 35 and 36 do not have the unnecessary portion 34 sandwiched between the required portions. In the case of being continuous, the surface in contact with the unnecessary portion is discontinuous (35a, 36a) according to the form of the unnecessary portion. According to a fourth aspect of the present invention, in the apparatus for dividing a finely processed thin plate according to any one of the first to third aspects, the device is provided on at least one of an upper side and a lower side of the unnecessary portion clamp portion and contacts the required portion. It is characterized in that a sag preventing member provided to protrude in the direction is provided.

[0010]

According to the present invention, in a work of separating unnecessary portions after cutting a required portion which has been continuously finely processed into a two-piece pattern, a plurality of sheets are stacked and the required portions on both sides are fixed. The swing of the unnecessary portion (joint portion) at the center is automatically repeated, and the partial connection line such as the half cut portion or the point stop portion at the boundary is cut due to metal fatigue. Moreover, in this case, tension is applied so that the required parts on both sides are kept away from the unnecessary part at the center, and the product is caused by interference between the end faces of the thin plate, which is likely to occur in the process of separating a plurality of separated separation surfaces one after another. To prevent the end accuracy from deteriorating. Further, when the unnecessary portion sandwiched between the required portions is discontinuous, the surface of the unnecessary portion clamp portion that contacts the unnecessary portion is discontinuous according to the form of the unnecessary portion. By the swing of the portion, it is possible to prevent the pattern in the vicinity of the adjacent portion between the required portions from being damaged. Furthermore, since the anti-sagging member is provided, it comes into contact with a required part during the division processing, and the end part that has been cut off earlier by swinging does not get caught or rubbed on the adjacent joint part that has not been cut off yet. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings and the like. FIG. 1 is an explanatory view (front view) showing a main part of an embodiment of the apparatus for dividing a micromachined thin plate according to the present invention, and FIG. 2 is a plan view of the main part of the embodiment of FIG. 1 and 2 show a state in which a material to be divided is set in the apparatus of the present embodiment (FIG. 1 is a state before a required partial clamp, and FIG. 2 is a state after a required partial clamp). 1 and FIG.
Are a pair of tables for mounting the thin plate 30 to be divided. The required portion clamp portions 3 and 4 are portions for clamping a part of a required portion of the thin plate 30 of the required two-piece set, and are provided as a pair of left and right portions. Unnecessary part clamp parts 5, 6
A required portion is a portion that clamps an unnecessary portion of the two-piece thin plate 30 from above and below.

The springs 7a, 7b, 8a and 8b are for pulling the pair of left and right required partial clamp portions 3 and 4 outwardly to apply tension to the thin plate 30. The unnecessary part clamp drive unit 9 is a part that incorporates a drive unit for driving and moving the unnecessary part clamp units 5 and 6 and swinging. Drip prevention plates W, W, W,
W is a plate that is attached to the upper and lower unnecessary portion clamp portions 5 and 6 so as to project laterally. This sagging prevention plate W is made of a flexible material, and the thin plate 30
, And the end that has been previously separated by the swinging is prevented from being caught or rubbed by the adjacent not-yet-connected junction, thereby preventing the accuracy of the product from being reduced.

Next, the operation of this embodiment will be described with reference to FIGS. FIG. 3 is a flowchart showing the relationship between the operation and the operation of the present embodiment.
4 is a step of each procedure of operation and operation. First, a set of two thin plates 30 such as a shadow mask to be split are placed and set on the left and right split material mounting tables 1 and 2. In this embodiment, for example, a maximum of 30 sheets (thickness 30
mm), and are aligned with a positioning pin (not shown) (see step 101). next,
A start switch on an operation console (not shown) is pressed (see step 102). In this embodiment, two left and right sides are used for safety.
If you do not press the switches at the same time, it will not start.

When the apparatus according to the present embodiment is started, the required portion clamp portions 3 and 4 are narrowed inward by the cylinders 41 and 42, and are lowered downward by the cylinders 43 and 44 to automatically form a part of the required portion. (Step 103)
reference). Subsequently, the coil springs 7a, 7b, 8a,
The outer end of 8b is pulled outward by an air cylinder (not shown), and tension is applied by a spring (see step 104). Next, the upper unnecessary part clamping unit 5
Is turned 90 degrees from a position 5a shown by a two-dot chain line in FIGS. 1 and 2, and is set to a position 5b at the center of the separation device (see step 105). Further, the upper unnecessary portion clamp portion 5 is lowered, and the upper and lower unnecessary portion clamp portions 5 and 6 are fixed to each other by fixing claws (not shown) (see step 106).

After the unnecessary portion clamping, the unnecessary portion clamping portions 5 and 6 start swinging, and continue the clockwise and counterclockwise swings until the required portion and the unnecessary portion are completely separated. When the separation of both sides is completed, a sensor (not shown) detects this and stops swinging (see steps 107 and 108). When either one of the separations is completed first, the separated required clamp portion 3 or 4 is pulled to both sides by the springs 7 and 8 to move, and the other unfinished separation is performed. Will not interfere. FIG. 4 (front view) shows unnecessary portion clamp portions 5 and 6.
Shows a state in which has swung clockwise, and FIG. 5 (front view)
The unnecessary part clamp parts 5 and 6 have shown the state rocked counterclockwise. The swing angle and the swing speed can be adjusted, and are set to an optimum state depending on the properties of the material to be divided, the shape such as the thickness, and the like.

After the division is completed and the swing is stopped, the pressure between the unnecessary portion clamp portions 5 and 6 is relaxed, and the clamp portions 5 and 6 are further tilted more than at the time of swing, and the unnecessary portion 2 is tilted.
4 falls and is collected in the collection box 27 (step 109, see FIG. 6). Then, unnecessary part clamp part 5,
The pawl for fixing the gap between the six parts is released, and the unnecessary part clamp part 5 rises (see step 110). Subsequently, the unnecessary portion clamp portion 5 turns 90 degrees and returns to the original position 5a (see step 111). In addition, required partial clamps 3, 4
Rises and the clamp is released (see step 112). In this state, the required portions 21 and 22 are manually taken out (see step 113). When a sensor (not shown) detects that the required portions 21 and 22 have been taken out, the required partial clamp portions 3 and 4 spread and return to their original positions (see step 114). In the flowchart of FIG. 3, all steps other than Step 101 (mask setting), Step 102 (press the start switch), and Step 113 (mask removal) are automatically performed by the present embodiment.

FIGS. 7 and 8 are explanatory views showing modified examples of the unnecessary portion clamping portion. FIG. 7 is a partially enlarged view showing an example of a case where a two-piece pattern processed into a thin plate to be divided is different from 30 in FIG. In this case, there are portions where the shadow mask patterns 31 and 32 are in direct contact with each other, and the unnecessary portions 34 between the masks forming a set are discontinuous (33 indicates a peripheral portion of the set of 2 pieces). This is an unnecessary part of the part.) Therefore, in such a case,
If the unnecessary portion clamp portion as shown in FIGS. 1 and 2 is used, the mask will swing while a part of the mask end is clamped by the unnecessary portion clamp portion, and this portion will be damaged (deformed). So, in such a case,
As shown in FIG. 8, the recesses 35a, 35a,
What has provided 36a should just be used. In FIG. 7, S and S shown by two-dot chain lines indicate positions where the unnecessary portion clamp portions 35 and 36 are in contact, and R is a sag preventing portion 37 and
37 indicates a position where the light beam strikes. Unnecessary part clamp part 3
The sagging prevention parts attached to both sides of 5 and 36 are not shown here.

The present invention is not limited to the embodiments described above, and various modifications and changes are possible, which are also included in the present invention. In the present embodiment, the case of a shadow mask of a cathode ray tube has been described. However, other products, for example, a thin plate obtained by finely processing a pattern such as a lead frame for a terminal group of a semiconductor, may be used as a device for dividing a required portion and an unnecessary portion. ,
It can be easily adapted to the present invention by changing its size and structure. Further, in the present embodiment, an example has been described in which an unnecessary portion sandwiched between required portions is divided. However, the present invention can also be applied to a case where unnecessary portions around the required portion are divided. In this case, the partial connection line may be extended from the periphery of the required portion to the end of the thin plate.

[0019]

As described above in detail, according to the first aspect, the required parts on both sides are fixed, and the swing of the unnecessary part (joint part) at the center is automatically repeated, so that the half at the boundary is formed. Since metal fatigue is caused in the cut portion or the point stop portion, the division can be performed efficiently without manual operation, and there is an effect that the accuracy of the required peripheral portion is high.

According to the second aspect of the present invention, the required portions on both sides are cut while applying tension so as to be away from the unnecessary portion at the center. Therefore, it is possible to prevent the end accuracy of the product from deteriorating due to interference between the end surfaces of the thin plates. it can.

Further, according to the third aspect, when the unnecessary portion sandwiched between the required portions is discontinuous, the surface in contact with the unnecessary portion of the unnecessary portion clamp portion may be changed according to the form of the unnecessary portion. By making it continuous, there is an effect that there is no possibility of damaging the pattern near the required portion when the unnecessary portion clamp portion swings.

According to the fourth aspect of the present invention, since the sag preventing member is provided, it comes into contact with a required portion during the splitting process, and the end that has been cut off earlier by the swinging is connected to the adjacent joint that has not been cut off. Since there is no snagging or rubbing, it is possible to prevent the accuracy of the product from being reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view (front view) showing a main part of an embodiment according to the present invention.

FIG. 2 is a plan view of a main part of the embodiment of FIG.

FIG. 3 is a flowchart showing a relationship between operation and operation of the embodiment of FIG. 1;

FIG. 4 is an explanatory view showing a swinging state (clockwise) of an unnecessary portion clamp portion.

FIG. 5 is a swinging state of the unnecessary portion clamp portion (counterclockwise).
FIG.

FIG. 6 is an explanatory view showing a state in which unnecessary portions are dropped and collected.

FIG. 7 is an explanatory diagram showing an enlarged portion of a modification of the division target.

8 is an explanatory diagram illustrating an example of an unnecessary part clamp unit corresponding to the division target in FIG. 7;

FIG. 9 is a plan view (surface view) showing a part of an example of a finely processed thin plate.

FIG. 10 is a rear view showing a part of the thin plate of FIG. 9;

FIG. 11 is an explanatory view showing a connecting portion of another example of a finely processed thin plate.

FIG. 12 is a plan view (surface view) showing a part of another example of a finely processed thin plate.

FIG. 13 is an explanatory view showing a method for removing unnecessary portions around a portion obtained by cutting the thin plate of FIG. 12;

FIG. 14 is an explanatory diagram showing a method of removing an unnecessary portion from the portion of FIG.

[Explanation of symbols]

 1, 2 divided material mounting table 3, 4 required partial clamp portion 5, 6, 35, 36 unnecessary partial clamp portion 7a, 7b, 8a, 8b spring 9 unnecessary partial clamp drive portion 10, 20 micromachined thin plate 11, 13, 21, 22, 31, 32 Required part 12, 14, 23, 24, 33, 34 Unnecessary part 30, 40 Two-piece thin plate of required part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-114900 (JP, A) JP-A-58-199531 (JP, A) JP-A-62-114899 (JP, A) JP-A-5-114899 24036 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B26F 3/00

Claims (4)

(57) [Claims] 1. A micromachined thin plate for dividing a required portion to be left of a micromachined thin plate and a divided material in which an unnecessary portion is connected to the required portion by a partial connection line into the required portion and the unnecessary portion. In the dividing apparatus, a divided material mounting table on which a plurality of the divided materials are stacked and placed; a required portion disposed on the divided material mounting table and clamping and holding at least a part of the required portion of the divided material A clamp portion, an unnecessary portion clamp portion that clamps and holds at least a part of the unnecessary portion of the divided material, and a swing portion that swings the unnecessary portion clamp portion around an axis parallel to a longitudinal direction thereof. A device for dividing a finely processed thin plate, comprising: 2. The micromachined thin plate dividing device according to claim 1, further comprising: a tension generating portion for applying a tension in a direction in which the required partial clamp portion is separated from the unnecessary portion clamp portion. Splitting device. 3. The dividing device for a micromachined thin plate according to claim 1, wherein the unnecessary portion clamp portion is provided when the unnecessary portion sandwiched between the required portions is discontinuous. A device for dividing a micromachined thin plate, wherein a surface in contact with the unnecessary portion is discontinuous according to a form of the unnecessary portion. 4. The dividing device for a micromachined thin plate according to claim 1, wherein the device is provided on at least one of an upper side and a lower side of the unnecessary portion clamp portion, and is in contact with the required portion. An apparatus for dividing a finely processed thin plate, comprising a sag preventing member provided so as to protrude in a direction.