JPH09141599A - Clearance drilling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a punch hole from being deformed by specifying the requirements of the relation among a clearance between a stripper and the center part ofa die, an error of the clearance between the stripper and the center part of the die in the axial direction crossed with the traveling direction of a plate material, and the thickness of the plate material. SOLUTION: A clearance (h) between a stripper 22 and the center part of a die 16 produced when a punch 20 is engaged with the die 16, an error Δh of the clearance (h) between the stripper 22 and the center part of the die 16 in the lateral direction crossed with the traveling direction of a plate material 14, and the thickness (t) of the plate material 14 are set so that they meet the requirements of the relation of t<=h+Δh<=8×t and 1<=Δh<=3×t. In this case, the thickness (t) of the plate material 14 is a dimension obtained by adding the plate thickness t1 of a support body 74 of an aluminum sheet to the plate thickness t2 of a clad sheet 76 of an all pulp sheet stuck on the surface of the support body 74.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a running punching device for punching a punched hole in a running plate material.

[0002]

2. Description of the Related Art For example, a PS plate formed by providing a photosensitive composition in layers on a support made of a thin metal plate such as an aluminum plate or a steel plate is used for lithographic printing. Since the PS plate is mounted on a printing machine for use, it is necessary to form a plurality of punch holes at predetermined positions on the PS plate for mounting the PS plate.

This punching device for forming punched holes is generally provided with a plurality of punches each having a punched shape of the punched holes and a die having a holed shape into which the tips of the punches fit. -Shaped or sheet-shaped plate material (P
The S plate is sandwiched between the punch and the die to perform a punching operation. Therefore, in order to efficiently perform this type of punching work, for example, Japanese Patent Laid-Open No. 61-24
As disclosed in Japanese Patent Publication No. 1096, there is known an apparatus for punching a web while moving a punching machine whose operation timing is controlled by a controller at the same speed as a web rewound at a constant speed. ing.

In this case, when the punching operation is repeated, the sharpness of the blades constituting the punching machine is easily deteriorated. Therefore, an interleaving paper such as polyethylene laminated paper is brought into close contact with the surface of the plate material and integrated with the interleaving paper. The plate material is perforated. Further, as disclosed in Japanese Patent Application No. 4-326983, by using all-pulp paper as an interleaving paper and coating amorphous hard carbon on the surface of at least one cutting edge of a punch and a die, A technique for effectively maintaining the sharpness of a blade is known.

[0005]

However, as described above, the all-pulp paper is used as the interleaving paper, the surface of the punch made of the SKH material and the surface of the die made of the SKD material are coated with amorphous hard carbon, and When punching was performed on a 15 mm thin aluminum plate, swelling occurred around the punch holes and at the rear end of the punch holes after 10 to 20 punching operations. Specifically, as shown in FIG. 9, a bulge 3 is formed on the rear end side of the punch hole 2 formed in the metal web 1 which is a plate material.
As shown in FIG. 10, ridges 4 are provided around the punch holes 2 formed at both ends of the metal web 1 in the width direction.

Here, as shown in FIG. 9, the bulge 3 is formed on the rear end side of the punch hole 2 because the velocity of the punch in the horizontal direction and the velocity of the metal web 1 are deviated from each other. When the gap between the stripper and the die is large, or when the amount of protrusion of the punch that engages with the blade of the die is large, the horizontal speed of the punch becomes equal to the speed of the metal web before the punch comes out of the metal web. This is because it will be slower than the comparison.

Further, as shown in FIG. 10, the metal web 1
In the punch holes 2 on both end sides of the metal web 1, the peripheral bulge 4 becomes large because the timing of withdrawing the punch from the metal web 1 does not match at the central portion and the end portion of the metal web 1. If the punch at the center of the metal web 1 comes out earlier than the punches at both ends of the metal web 1, the center of the metal web 1 bends downward and the punches at both ends become difficult to come out. This is because the punch hole 2 comes up while coming into contact with the punch hole 2.

Therefore, conventionally, this type of swelling 3, 4
When the occurrence of the stripper is confirmed, the height of the stripper is adjusted to be low so that the gap between the stripper and the die is narrowed evenly in the width direction, or the mold is disassembled to reduce the amount of bending of the stripper by the stripper spring. Work such as reducing the number of stripper springs is performed so that the stripper becomes smaller in the central portion thereof. As a result, it was pointed out that a lot of time was spent on the adjustment work of the mold and the adjustment work of the stripper, and the productivity was reduced, and a large number of defective products were generated for confirmation. ing.

The present invention solves this kind of problem, and does not require adjustment of a mold or the like, and provides a running punching device capable of effectively improving productivity and reducing defective products. The purpose is to provide.

[0010]

In order to solve the above-mentioned problems, the present invention relates to a gap h between the stripper and the center of the die when the punch is engaged with the die, the stripper in the width direction of the plate and the stripper and the die. Error Δ of the gap h at the center of the die
h and the thickness t of the plate material satisfy the relational expression of t ≦ h + Δh ≦ 8 × t 0 ≦ Δh ≦ 3 × t. As a result, the deformation of the punch holes is reliably prevented, the number of punches is effectively increased, and the productivity is improved.

Further, when the blade edge of the punch is formed of a curved surface portion, the depth d of the curved surface portion, the radius r of rotation of the rotary die in which the punch is arranged, the blade thickness w of the die, and the punch are the same as those of the die. The protrusion amount x which engages with the blade satisfies the relational expression of 0.5 × t <d ≦ 5.0 × t d <x ≦ w + d 0.01 <(h + w + d) / r <0.06. On the other hand, when the blade edge of the punch is formed of a flat surface portion, the relational expression of 0 <x ≦ w 0.01 <(h + w) / r <0.06 is satisfied. As a result, it is possible to reduce the impact at the time of punching, reduce the amount of protrusion of the punch, and reliably prevent deformation of the punch hole.

Further, the distance y from the flat surface of the blade edge of the punch to the tip of the kicker pin, the spring constant k of the spring engaging with the kicker pin, and the tensile strength f of the interleaving paper are 0 <y <f / k. The relational expression of w ≦ x + y 0 <x is satisfied. As a result, it is possible to prevent the punch dust from being pulled up while reducing the protrusion amount of the punch toward the die side, and it is possible to reliably prevent the interleaving paper from breaking.

Further, when the clearance c between the opening of the stripper and the punch satisfies the relational expression of 0.2 × t ≦ c ≦ 3.0 × t, the variation in the gap between the stripper and the die can be reduced. Therefore, it becomes possible to form a highly accurate punch hole.

[0014]

1 is a schematic front view of a running drilling device 10 according to an embodiment of the present invention, and FIG. 2 is a partially longitudinal side view of the running drilling device 10. As shown in FIG. The running perforation device 10 is attached to the lower mold plate 12, and is indicated by an arrow A in FIG.
Dies 16 that are movable in the direction of arrow A at the same speed as the plate material 14 such as a thin metal plate that is conveyed in the direction, and a plurality of punches that are arranged on the upper die plate (rotary die) 18 and that can move forward and backward toward the dies 16. 20 and a stripper 22 that is attached to the upper mold plate 18 so as to be movable back and forth and abuts on the plate material 14 when punched by the punch 20, or has a gap between the plate material 14 and the stripper 22.

As shown in FIGS. 1 and 2, a pair of guide rails 26, which are directed in the direction of arrow A and are parallel to each other, are provided on a base 24 that constitutes the running-hole punching device 10, and the guide rails 26 are provided. A movable table 28 is slidably supported on the rail 26. The lower die plate 12 is arranged on the upper portion of the moving base 28, and the upper die plate 18 is held by a pair of processing shafts 30 which are vertically slidably supported by the moving base 28 and slidably supported.

As shown in FIG. 2, a first shaft 34 constituting a crankshaft 32 is rotatably inserted into the substantially central portion of each machining shaft 30, and the first shaft 34 and the elongated second shaft 34. Three
Both ends of 6 are connected via a pair of first arms 38. The second shaft 36 is rotatably supported by the base 24, and the third shaft 40 provided on one end side of the second shaft 36 is connected to the drive motor 44 via the speed reducer 42. To be done. A rotary encoder 48 is engaged with the third shaft 40 via a belt / pulley means 46. The crankshaft 32 rotates via a drive motor 44, and the punch 20 mounted on the upper die plate 18 is moved by the first arm 38.
Is rotated by a radius of rotation r corresponding to the length of.

As shown in FIGS. 1 to 3, the lower mold plate 1
Guide rods 50 are provided upright at the four corners of 2, and stoppers 51 are provided near the guide rods 50. A die 16 is arranged at a substantially central portion of the lower die plate 12, and a blade portion 52 is provided on the die 16 so as to correspond to each punch 20 side. The upper plate 1 is attached to the guide rod 50.
8 is supported so as to be able to move up and down.
A plurality of punches 20 on the lower surface of the punch holder 54 through the punch holder 54.
Is attached. This punch 20 has two rows and four in each row.
˜70, in the present embodiment, 30 are provided each. The stripper 22 is held in the lower part of the upper mold plate 18 via four to twelve stripper springs 56 so as to be movable up and down. A concave portion 58 having a depth of 0.25 mm is formed on the lower surface of the stripper 22 in advance. This recess 58
As shown in FIG. 2, is configured to curve upward with respect to the width direction intersecting the traveling direction of the plate member 14.

As shown in FIG. 4, the cutting edge 60 of the punch 20.
Is provided with a curved surface portion 64 that curves inward from the flat surface portion 62 on the outer peripheral portion side toward the central portion of the cutting edge 60. A stepped hole portion 66 is formed in the center of the punch 20 in the axial direction, and a spring 68 is arranged on the large diameter side of the stepped hole portion 66, and one end of the spring 68 is the punch 20.
It is held by a set screw 70 screwed into. The kicker pin 72 is engaged with the other end of the spring 68, and the tip end portion 72 a of the kicker pin 72 has the cutting edge 6 of the punch 20.
It projects outward from 0.

As shown in FIG. 5, the punch 20 is a die 1.
6, the gap h between the stripper 22 and the center of the die 16, the error Δh between the gap h between the stripper 22 and the center of the die 16 in the width direction intersecting the traveling direction of the plate material 14, and The thickness t of the plate member 14 is set so as to satisfy the relational expression of t ≦ h + Δh ≦ 8 × t (1) 0 ≦ Δh ≦ 3 × t (2). The thickness t of the plate member 14 is the plate thickness t1 of the support 74, which is a thin aluminum plate.
And the plate thickness t2 of the interleaf paper 76 which is an all-pulp paper adhered to the surface of the support 74.

The radius of rotation r of the upper die plate 18, which is a rotary die, the depth d from the flat surface portion 62 to the curved surface portion 64 of the cutting edge 60 of the punch 20, the blade thickness w of the die 16, and the punch 20 at the time of punching. The protrusion amount x (see FIG. 6) by which the punch 20 engages with the blade of the die 16 is: 0.5 × t <d ≦ 5.0 × t (3) d <x ≦ w + d (4) 0 .01 <(h + w + d) / r <0.06 (5) The relational expression is set.

A spring 68 arranged in the punch 20.
Spring constant k of the flat surface 62 of the cutting edge 60 of the punch 20
The distance y from the kicker pin 72 to the tip 72a of the kicker pin 72 and the tensile strength f of the interleaf paper 76 are as follows: 0 <y <f / k (6) w ≦ x + y (7) 0 <x (8) It is set to satisfy the formula.

The stripper 22 is formed with an opening 22a through which the punch 20 is inserted, and the opening 2a is formed.
The clearance c between 2a and the punch 20 is set so as to satisfy the relational expression of 0.2 × t ≦ c ≦ 3.0 × t (9). The operation of the running drilling device 10 configured as described above will be described below.

As shown in FIG. 1, the plate member 14 having the interleaf paper 76 adhered to the upper surface of the support member 74 is continuously conveyed in the direction of arrow A, and the running perforation apparatus 10 uses the plate member 14 of the plate member 14. It is driven in synchronization with the transportation. That is, the drive motor 44
When the crankshaft 32 rotates at a predetermined rotation speed in the direction of the arrow in FIG.
The shaft 34 rotates about the second shaft 36 with a rotation radius r. Therefore, the movable table 28 is displaced back and forth in the direction of arrow B along the guide rail 26, and near the processing position of the die 16 and the punch 20, moves in the direction of arrow A at the same speed as the plate material 14. The machining shaft 30 that engages with the first shaft 34 moves forward and backward in the up-down direction (direction of arrow C), and the upper mold plate 18 held by the machining shaft 30 moves along the rotation radius r with respect to the base 24. It will rotate and move.

In this case, the upper die plate 18 moves vertically with respect to the lower die plate 12 via the guide rod 50, and the upper die plate 18 descends so that the stripper 22 first contacts the stopper 51. After that, the upper mold plate 18 is lowered against the stripper spring 56.
For this reason, the punch 20 disposed on the upper die plate 18 via the punch holder 54 includes the blade portion 52 of the die 16.
Is engaged with and punching work is performed on the plate member 14.

After the punching work is completed, when the punch 20 is integrally lifted with the upper die plate 18 via the punch holder 54, the stripper 22 causes the plate 20 to smoothly separate from the plate 14. Hold 14 After the punch 20 moves up to a predetermined position, the stripper 22 moves up via the upper mold plate 18. When the punch 20 moves up, the kicker pin 72 projects downward from the cutting edge 60 of the punch 20 through the elastic force of the spring 68 arranged in the punch 20. As a result, the perforated chips adhering to the cutting edge 60 are pressed and removed by the tip portion 72 a of the kicker pin 72.

Next, the plate thickness t2 = 0.05 m on the support 74 which is a thin aluminum plate having a plate thickness t1 = 0.15 mm.
A plate material 14 (t = 0.2 mm) to which an interleaf paper 76, which is an all-pulp paper having m and a tensile strength f = 2.0 kg, is adhered.
The conventional running drilling device having the dimensions shown in Table 1 by using (the specific structure is the same as that of the running drilling device 10).
Was used to perform the perforation work. The radius of gyration r of the upper mold plate 18 was set to 65 mm.

[0027]

[Table 1]

As a result, when the number of perforations was 10 to 30, the punch holes 2 were raised 3 and 4 as shown in FIGS. 9 and 10. This is because the gap error (variation) Δh = 0.85 mm in Table 1 is large,
Since the variation in the gap between the stripper 22 and the die 16 becomes large, it takes a considerable time until the punch 20 comes out of the plate material 14, and the horizontal speed of the punch 20 becomes slower than the speed of the plate material 14. Is.

In Table 1, the clearance c is 1.0 m.
Since it is set to m, when the punch 20 rises after punching, the plate material 14 enters the opening 22a of the stripper 22, and as shown in FIG. have done. On the other hand, when the punching work was performed using the running punching device 10 set to the dimensions shown in Table 2, the shape of the punched hole 2 was obtained even if continuous punching was performed with the number of punches of 50,000 or more. No defects occurred.

[0030]

[Table 2]

That is, in Table 2, the error Δh = 0.1 m
Since the clearance c was set to a small value of 0.1 mm and the clearance c was set to a small value of 0.1 mm, it was possible to reliably prevent the swelling 3 and 4 from occurring in the punch hole 2. Therefore,
By satisfying the expressions (1), (2), and (9), it is possible to reliably form the punch holes 2 with high accuracy even if a large number of punches are performed.

However, under the conditions shown in Table 2, the punching dust remains in the die 16, and when the punch 20 moves up, the interleaf paper portion of the punching dust adheres to the plate material 14 and the plate material 1
4 caused damage such as damage to No. 4. This is because the size of the projection amount x with which the punch 20 engages with the blade of the die 16 is too small with respect to the size of the blade thickness w of the die 16, so that the punch dust cannot be extruded from the die 16. is there.

Therefore, as shown in Table 3, when the punching operation was performed by using the running punching device 10 in which the respective dimensions were set, the shape defect of the punch holes 2 did not occur, and the drilling scraps were not generated. The advantage that the high quality punching work is surely performed without being pulled up to the plate material 14 side was obtained.

[0034]

[Table 3]

That is, in Table 3, by satisfying the relation of the expression (7), the punching work of the plate material 14 having the interleaf paper 76 is effectively performed. As described above, in the running drilling apparatus 10 according to the present embodiment, by satisfying the expressions (1) and (2), the punch holes 2 formed in the plate material 14 are not deformed, and the number of drilling times is increased. Can be effectively increased and productivity can be improved.

Further, by satisfying the expressions (3) to (5), the impact generated at the time of punching by the punch 20 is reduced and the projection amount x of the punch 20 projecting into the die 16 is reduced. Also, it is possible to reliably prevent the hole deformation. Further, by satisfying the equations (6) to (8), it is possible to reduce the protrusion amount x of the punch 20 and to prevent the punch dust from being pulled up when the punch 20 is raised, and further, to prevent the interleaving paper 76 from being damaged. It becomes possible to effectively prevent. Furthermore, by satisfying the expression (9), it is possible to effectively reduce the occurrence of hole deformation.

Moreover, in this embodiment, as shown in FIG. 2, the stopper 51 and the stripper spring 56 provided on the lower mold plate 12 are set at a position of a distance s (65 mm), and the lower surface of the stripper 22 is set. Depth 0.
A 25 mm recess 58 is formed. As a result, when the punch 20 engages with the die 16, the gap between the stripper 22 and the die 16 can be uniformly maintained in the width direction of the plate material 14.

A flat portion 62 is formed on the cutting edge 60 of the punch 20.
And the curved surface portion 64 are provided, the punch 2 shown in FIG.
The cutting edge 60a may be composed of only the curved surface portion 64a as in 0a. At that time, the same effects as the punch 20 can be obtained by satisfying the expressions (3) to (5). further,
As shown in FIG. 8, when the number of punches 20b arranged in the punch holder 54 is small, the blade edge 60b of the punch 20b may be composed of only the flat surface portion 62a. At that time, the protrusion amount x of the blade edge 60b of the punch 20b,
The distance y from the cutting edge 60b to the tip portion 72a of the kicker pin 72 and the blade thickness w of the die 16 are as follows: 0 <x ≦ w (10) 0.01 <(h + w) / r <0.06 ( 11) The punch 2 is set by satisfying the relationship of w ≦ x + y (where x> 0) (12)
The same effect as 0 can be obtained.

The cross-sectional shape of the punch 20 is, for example,
The same effect can be obtained with any shape such as a circle, an oval, a semi-oval, or a quadrangle.

[0040]

According to the running perforation apparatus of the present invention, an error Δh between the gap h between the stripper and the center of the die when the punch is engaged with the die and the gap h between the stripper and the die in the width direction of the plate material. , And the thickness t of the plate material
However, by satisfying the relational expression of t ≦ h + Δh ≦ 8 × t 0 ≦ Δh ≦ 3 × t, the deformation of the punch holes is reliably prevented, the number of times of punching is effectively increased, and the productivity is improved. .

[Brief description of the drawings]

FIG. 1 is a schematic front explanatory view of a running perforation apparatus according to the present invention.

FIG. 2 is a partial vertical cross-sectional side view of the running-drilling device.

FIG. 3 is a vertical cross-sectional view of a lower mold plate and an upper mold plate that constitute the running perforation apparatus.

FIG. 4 is a vertical cross-sectional view of a punch which constitutes the running punching device.

FIG. 5 is a partially enlarged cross-sectional view of a die, a stripper and a punch which constitute the running punching device.

FIG. 6 is a partial cross-sectional view showing an operation when punching with a die and a punch.

FIG. 7 is an explanatory diagram of a punch having a cutting edge formed only of a curved surface portion.

FIG. 8 is an explanatory diagram of a punch having a cutting edge formed only of a flat surface portion.

FIG. 9 is an explanatory perspective view showing a state in which a protrusion is formed on the rear end side of the punch hole.

FIG. 10 is a perspective view illustrating a state in which a bulge is formed on the entire periphery of a punch hole.

[Explanation of symbols]

10 ... Running punching device 12 ... Lower mold plate 14 ... Plate material 16 ... Die 18 ... Upper mold plate 20, 20a
20b ... Punch 22 ... Stripper 28 ... Moving table 60, 60a, 60b ... Blade edge 62, 62a ...
Flat part 64, 64a ... Curved part 68 ... Spring 72 ... Kicker pin 74 ... Support 76 ... Interleaf paper

Claims (5)

[Claims] 1. A running perforation apparatus for punching a punch hole in a running plate material, comprising a die movable at substantially the same speed as the plate material, a punch capable of advancing and retracting toward the die, and the punch. A stripper that is in contact with the plate material at the time of punching by, or is arranged with a gap between the strip material and the strip material, and the stripper and the die central portion when the punch engages the die. The gap h, the error Δh of the gap h between the stripper and the center of the die in the width direction intersecting the traveling direction of the plate material, and the thickness t of the plate material are t ≦ h + Δh ≦ 8 × t 0 ≦ Δh ≦ 3 × A running drilling device characterized by satisfying a relational expression of t 1. 2. The running perforation apparatus according to claim 1, wherein the punch is disposed in a rotary die that rotates and moves, and a blade edge of the punch is inward toward a central portion of the blade edge. A curved curved surface portion is provided, and the radius of rotation r of the rotary die, the depth d of the curved surface portion, the blade thickness w of the die, and the punch engages with the blade of the die during punching by the punch. The running distance perforation device, wherein the protrusion amount x satisfies a relational expression of 0.5 × t <d ≦ 5.0 × t d <x ≦ w + d 0.01 <(h + w + d) / r <0.06. . 3. The running perforation apparatus according to claim 1, wherein the punch is disposed in a rotary die that rotates and moves, and the blade edge of the punch is formed of a flat surface portion. The radius of rotation r, the blade thickness w of the die, and the protrusion amount x with which the punch engages with the blade of the die during punching with the punch are 0 <x ≦ w 0.01 <(h + w) / r <0. A running punching device characterized by satisfying the relational expression 06. 4. The running punching device according to claim 1, wherein the punching is performed when punching out the plate material that is electrostatically bonded to the interleaving paper and is disposed inside the punch by a spring. The spring constant k of the spring, the distance y from the flat surface of the cutting edge of the punch to the tip of the kicker pin, and the tensile strength f of the slip sheet are 0 <y < A running perforation apparatus, characterized in that a relational expression of f / k w ≤x + y 0 <x is satisfied. 5. The running perforation apparatus according to claim 2, wherein the stripper is formed with an opening through which the punch is inserted, and a clearance c between the opening and the punch is 0.2. A running perforation apparatus characterized by satisfying a relational expression of xt <c≤3.0xt.