JPH0976200A - Punch unit for machining non-metallic sheet material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of warpage and the deformation of a sheet material and to prevent the following and attachment of the sheet material to a punch, etc., by providing a sheet material presser plate installed between a punch hole and a plate punch provided on a plate dice and the plate dice and to pressurize the sheet material. SOLUTION: When driving force is applied to an upper die 2, the upper die 2 is pushed downward against energizing force of a spring 7. The upper die 2 is guided by a guide post 6 and lowered. Thereafter, a sheet material presser plate 13 presses a non-metallic sheet material downward and makes it adhered on a plate dice 3. Thereafter, the sheet material presser plate 13 approaches a punch holder 12 while compressing a spring 14 for the sheet material presser plate. Furthermore, when the upper die 2 is lowered, the plate dice 3 installed on a lower die 1 and the plate punch 4 installed on the upper die 2 and a punching punch 5 are engaged with each other and machine the non-metallic sheet material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch unit capable of punching and / or cutting end portions of various non-metal sheet materials such as various types of papers, films, and thin plate plastics. It is a thing.

[0002]

2. Description of the Related Art Non-metallic materials wound in a roll, for example, non-metallic sheet materials such as paper, film and plastic are
In many cases, it is repeatedly stretched from the container or magazine, or wound around the container or magazine for storage.
In this case, for example, as shown in FIG. 6, the front end side and the rear end side of the non-metallic sheet material are processed into a shape formed by a curve or a combination of curves and straight lines, respectively. A method is used in which holes are formed and a hard claw-shaped member is hooked at these ends or holes to extend or wind the container. FIG. 6 is a state in which the non-metal sheet material is extended, and FIG. 7 is a diagram showing a state of the wound non-metal sheet material.

When the end portions are shaped or perforated as described above, many non-metal sheet materials are weak,
It is necessary to re-process the end shape or the hole because the shape of the end face and the hole may be deformed or damaged during repeated use (that is, unwinding and winding). This point is the subject of the present invention, which is significantly different from the case of the metal sheet material. This is because the rigidity of the metal sheet material greatly reduces the risk of deformation and damage.

It is generally known to use the Thomson blade method when cutting the end portion of a non-metallic sheet material into a curved line or a shape formed by a plurality of straight lines or a combination of curved lines. In this Thomson blade method, a narrow groove corresponding to the shape to be cut is formed in the base material, a thin plate-shaped blade tool is fitted into this groove, and the side surface (edge) of the band is cut.
It is a method of cutting at the edge part. As a method for punching a small hole, a punch unit provided with a cylindrical punch and a die corresponding thereto, for example, Jikkai Sho-61-1.
The one disclosed in 2153 is also known.

[0005]

In the case of the above-mentioned Thomson blade method, it is possible to form a shape having a large radius of curvature, but when forming a shape having a small radius of curvature, a strong bending is applied to a part of the blade of the strip material. Molding is difficult because it must be applied and fitted into the groove. For example, the width of non-metallic sheet material is 20
It is practically impossible to form an end face shape of ˜50 mm as shown in FIG. 5 by the Thomson blade method because bending is difficult because the curvature of the belt-shaped blade is small. Further, when there is a hole near the end face to be molded, it is necessary to attach a punch for punching and a punch hole, or to perform punching in a separate step by the punch unit including the punch and the die described above. Further, since the groove processing for embedding the blade of the strip material is machining or electric discharge machining, there is a problem in mass productivity of the punch unit itself.

Further, when forming the end portion and punching in the vicinity thereof, since the non-metallic sheet material is soft, it is locally deformed, so that it is between the end forming punch and the punching punch. There is also a problem that the sheet material after molding cannot be taken out smoothly because it is not fitted and does not separate naturally.
INDUSTRIAL APPLICABILITY According to the present invention, the end portion of the non-metallic sheet material can be formed into a curved line or a combination of curved lines and straight lines as illustrated in FIG. An object of the present invention is to provide a compact and inexpensive punch unit which can prevent deformation of a non-metal sheet material inserted between and which can be easily taken out.

[0007]

DISCLOSURE OF THE INVENTION The inventor of the present invention needs to easily re-form the end shape even if the end shape is deformed or damaged peculiar to a non-metallic sheet material, and perforation is required. We have developed a punch unit for the purpose of being able to do it at the same time, and to make the punching device itself compact and inexpensive and easy to assemble. Then, for the formation of the end shape, both a plate punch and a plate die having a sufficient hardness that has been subjected to quenching and tempering and having the desired end shape are formed by press molding, etc. and used as a set. Then, it was found that the problems of the Thomson blade method can be solved at once. Moreover, in the present invention, when punching is also required, a punch for punching is provided in a part of the plate punch for forming the end portion, and a punch hole for punching is attached to a part of the plate die to form the end portion of the sheet material. It is possible to process and drill at the same time.

Further, a sheet material pressing plate is provided at a position projecting from the tips of the plate punch and the punching punch, the sheet material pressing plate is supported by an elastic body, and the sheet material is pressed and restrained before the start of punching. After that, the plate punch and the non-metallic sheet material fitted between the punches were pushed out by the elastic force of the elastic body so that the non-metallic sheet could be taken out smoothly.

Specifically, the present invention is a thin plate punch and plate formed from a thin plate material that has been subjected to quenching and tempering, and processing the end portion of a non-metallic sheet material into a curved line or a combination of curved lines and straight lines. A die, a punch punch provided in the plate punch to be formed near the end of the non-metallic sheet material, a punch hole provided in the plate die, and the punch between the plate punch and the plate die. And a sheet material pressing plate that presses the sheet material by operating the plate punch in the thickness direction of the non-metallic sheet material inserted between the plate punch and the plate die. A punch unit for processing a non-metallic sheet material, which is characterized by performing cutting and punching. And the sheet material pressing plate is
Before the plate punch and the punching punch come into contact with the sheet material inserted between the plate die and the plate punch, the sheet material is pressed against the plate die, and the plate punch and the punching are performed from the processed sheet material. A non-metal sheet material processing punch unit, which has a thin plate shape for releasing the pressing of the sheet material after the punch is released, and is mounted between the plate punch and the plate die.

In the punch unit for processing a non-metallic sheet material according to the present invention, if either or both of the plate punch and the plate die to be used are manufactured by press-punching a quenched and tempered steel strip. The major feature is that plate punches and plate dies can be easily obtained even with complicated shapes. For plate dies and plate punches, the C content is
By pressing and punching a thin steel material having a thickness of about 0.3 to 1.3% and a thickness of 5 mm or less and having been HV400 to 700, it is possible to form a plate die and a plate punch having a complicated outer peripheral shape. As a concrete steel material, JIS SK
Materials and SKS materials are inexpensive and have good moldability. of course,
Other steel types may be used as long as the quenching and tempering hardness can be adjusted to about HV 400 to 700. Then, each is attached to the lower die and the upper die.

Regarding the holes in the vicinity of the outer circumference, it is preferable to punch holes at the same time when press punching and to attach the punch side to the upper die to which the punch is attached so as to be adjustable later. For example, if the punch is attached to the punch holder in advance and then attached to the upper die, the adjustment is easy. The punching unit for processing a non-metal sheet material of the present invention prepares a frame for a lower die and an upper die, and provides a plate die and punch holes for punching on the upper surface of the lower die, and the plate die on the lower surface side of the upper die. And a basic structure for attaching a plate punch that meshes with a predetermined clearance and a punch for punching. However, if the punching is not necessary, the punch hole and the punch for punching can be omitted. Then, by mounting the sheet material holding plate between the plate punch and the plate die, the sheet material is pressed immediately before the cutting and processing of the sheet material and the non-metallic sheet material is constrained. The deformation of the sheet material is prevented, the variation in the positions of cutting and punching is reduced, and the sheet material is pressed until the two punches and the sheet material are separated even after the completion of the cutting, so that the sheet material is reliably removed from the punch. be able to.

In a further preferred embodiment, the punch unit of the present invention is provided with either one or both of a guide for determining the position of the sheet material in the width direction and a positioning member for determining the position of the front end portion of the sheet material in the longitudinal direction. Good. The guide may be a pin. If you do this,
Even if a non-metallic sheet material is manually inserted, it can be easily positioned at a fixed position and end face shape processing and perforation can be performed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Since the non-metal sheet material to be processed by the present invention has a thickness of about 0.5 mm or less, the dies and punches should be slightly thicker than 0.7 mm.
It was found that the sheet material can be punched out if it has a thickness of about 1.0 mm, and attention was paid to this.
By using a thin plate of heat-treated steel material for the die and punch, press punching is possible while having a certain high hardness, and complex continuous shapes and holes can be easily formed. Further, by using the hardened steel strip material, the heat treatment after the processing becomes unnecessary, and the distortion due to the heat treatment of the thin plate material is eliminated, so that the finishing processing is also unnecessary.

Since machining is performed by press punching, variation in machining is reduced even with a complicated continuous shape or hole in which a curved line and a straight line are combined. Therefore, the above-described effect of zero distortion and punches and dies with high dimensional accuracy are obtained. Is obtained,
Even if the punch and die become unusable due to wear or the like, they can be easily replaced.
Then, in the punching of the plate material used for the plate die and the plate punch, when the plate material becomes thick, it is necessary to prepare the surface to be punched (polishing etc.), but in the present invention, the plate material having a thickness of about 1.0 mm or less is required. Since it is used, there is no need for it and it can be used as a plate die or a plate punch as it is, which is a great feature of the present invention. Further, since the non-metallic sheet material to be processed by the punch unit of the present invention is extremely soft, when the punching punch or the plate punch comes into contact with each other in a free state, warping or local deformation may occur. To do. Therefore, in the punch unit of the present invention, before the punching punch or the plate punch comes into contact with the sheet material, that is, immediately before the start of processing, the sheet material pressing plate presses and constrains the sheet material to the plate die. The deformation can be prevented.

Immediately after the processing is completed, the sheet material is pressed against the sheet material pressing plate until the plate punch or the punching punch is separated from the sheet material, so that the sheet punching or punching punch follows the lifting operation. There is no problem, and the sheet material can be taken out smoothly. Therefore, there is also an effect that the dimensional accuracy of the processed portion of the end portion of the sheet material is improved. As described above, in order to prevent the soft deformation or warpage of the sheet material, it is desirable that the sheet material pressing plate has a shape that can press almost the entire surface of the processed portion of the sheet material. In this case, the portion of the sheet material pressing plate that is close to the plate punch may be formed into a similar shape having a slightly smaller size than the plate punch.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to one embodiment and the drawings. FIG. 1 is a front view showing an embodiment of a punch unit for sheet material processing according to the present invention, and FIG. 2 is a side view thereof. Guide posts 6 are fixed to the lower die 1 at the four corners, guides 8 are attached to the four corners of the upper die 2 at positions paired with the guide posts 6 described above, and the upper die 2 moves in the axial direction of the guide post 6. It is possible. A spring 7 is attached to the outer periphery of the guide post 6 for urging the upper die 2 so as to push it upward.

As shown in FIG. 3, on the upper surface of the lower die 1, a plate die 3, guide pins 9 for controlling the position of the non-metal sheet material 20 in the width direction, and a stopper 10 which is a positioning member for the end portion of the sheet material. Is attached. The plate die 3 is provided with a punch hole 3a, and the lower die 1 is provided with a hole 11 for removing the cutting residue of the non-metal sheet material 20. The guide pin 9 is effective in preventing the sheet material from moving or shifting in the width direction, and the stopper 10 as a positioning member stops the sheet material at a constant position in the longitudinal direction, so that the edge of the sheet material is stopped. The shape of the part can be processed under constant conditions.

On the other hand, the upper die 2 is provided with a punch holder 12. The punch holder 12 has a plate punch 4 at a position facing the die 3, and a punch hole 3a provided in the plate die 3.
When the punching punch 5 is installed at a position opposite to the upper die 2 and the upper die 2 moves downward in the drawing, the plate die 3 has a plate punch 4
However, the punch holes 3a are formed and assembled so that the punching punches 5 engage with each other with a certain clearance. A sheet material pressing plate 13 is provided between the punch holder 12 and the lower die 1, and the provision of the sheet material pressing plate 13 is a major feature of the present invention. The sheet material pressing plate 13 is urged in the direction of the lower die 1 by the sheet material pressing plate spring 14, and the stopper pin 15 attached to the sheet material pressing plate 13 causes the sheet material pressing plate 13 to be positioned below the blade edges of the plate punches 4 and 5. It is designed to stop at a certain position.

Next, the operation of the punch unit thus formed will be described. First, the end portion of the non-metallic sheet material 20 is passed between the guide pins 9 and is pushed and positioned until the tip 20a contacts the stopper 10. When a driving force is applied to the upper die 2, it opposes the biasing force of the spring 7. It is pushed down. The upper die 2 is guided by the guide post 6 and descends. Then, the sheet material pressing plate 13 presses the non-metal sheet material 20 downward to bring it into close contact with the plate die 3. Then, the sheet material pressing plate 13 approaches the punch holder 12 while compressing the sheet material pressing plate spring 14.
When the upper die 2 is further lowered, the plate die 3 attached to the lower die 1, the plate punch 4 attached to the upper die 2 and the punching punch 5 mesh with each other, and the non-metal sheet material 2
Process 0.

The cutting meal of the non-metal sheet material 20 is the lower die 1.
It is discharged from the cutting waste removal hole 11 provided in the. Then, when the driving force applied to the upper die 2 is released, the upper die 2 is biased by the spring 7 and starts to return to the initial position. At this time, the punch holder 12, the plate punch 4, and the punching punch 5 attached to the upper die 2 are all raised, but the sheet material pressing plate 13 is biased downward by the sheet material pressing plate spring 14, so that The metal sheet material 20 is still pressed, and then the sheet material pressing plate 13 rises together with the punch holder 12 after the non-metal sheet material 20 comes out of the plate punch 4 and the punching punch 5. Therefore,
Since the non-metallic sheet material 20 after being processed does not cause a problem that the sheet material 20 is lifted up following the plate punch 4 or the punching punch 5 or attached to the plate die, the sheet material can be taken out smoothly from the punch unit. Can be done.

[0021]

As described above, according to the present invention, the end portion of the non-metal sheet material is cut and formed into a complicated shape constituted by a curve or a line formed by combining a curved line and a straight line, and is provided in the vicinity thereof. A punch unit capable of simultaneously processing holes can be made compact and provided at low cost. Further, in the punch unit of the present invention, since the sheet material pressing plate presses the sheet material from immediately before processing to after the processing, the sheet material does not warp or deform, and the sheet material follows the punch or the like. Since there is no problem of sticking or sticking, the sheet material can be easily taken out from the punch unit.

Since the punch unit of the present invention can form a plate die or a plate punch by simply punching a thin plate material with a press, it contributes to lowering the cost of the punch unit and has high compatibility. Even if the plate die or the plate punch is worn, there is almost no need to adjust the clearance after replacement, and the punch unit is very advantageous in terms of maintenance.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a punch unit for a non-metal sheet material according to the present invention.

FIG. 2 is a side view showing an embodiment of a punch unit for a non-metal sheet material according to the present invention.

FIG. 3 is a top view of a lower die showing an embodiment of a punch unit for a non-metal sheet material of the present invention.

FIG. 4 is a bottom view of the upper die showing an embodiment of the punch unit for a non-metal sheet material of the present invention.

FIG. 5 is a cross-sectional view showing an example of a mounting state of a sheet material pressing plate in relation to the non-metallic sheet material punch unit of the present invention.

FIG. 6 is a view showing an example of an end face shape of a non-metal sheet material which is a material to be processed in the punch unit for non-metal sheet material of the present invention.

FIG. 7 is a conceptual diagram showing a state in which a non-metallic sheet material, which is a material to be processed in the non-metallic sheet material punch unit of the present invention, is wound up. 1 lower die, 2 upper die, 3 plate die, 3a punch hole, 4 plate punch, 5 punching punch, 6 guide post, 7 spring, 8 guide, 9 guide pin, 10 stopper, 11 cutting lees removal hole, 12 Punch holder,
13 sheet material holding plate, 14 sheet material holding plate spring,
15 stopper pin, 20 sheet material, 20a sheet material end surface, 20b sheet material hole

Claims (2)

[Claims] 1. A thin plate punch and plate die formed from a thin plate material that has been subjected to quenching and tempering, and processing the end portion of a non-metallic sheet material into a curved line or a combination of curved and straight lines, and the non-metal. The punching punch provided in the plate punch to be punched in the vicinity of the end portion of the sheet-making material, the punch hole provided in the plate die, and the punching hole provided in the plate die and the plate die are pressed to press the sheet material. A sheet material pressing plate, which operates the plate punch in the thickness direction thereof to perform cutting and punching of the end portion of the non-metallic sheet material inserted between the plate punch and the plate die. A punch unit for processing non-metallic sheet materials, which is characterized in that 2. The sheet material pressing plate presses the sheet material against the sheet die before the sheet punch and the punching punch come into contact with the sheet material inserted between the sheet die and the sheet punch. After the plate punch and the punching punch are released from the formed sheet material, the sheet material has a thin plate shape that releases the pressing of the sheet material, and is mounted between the plate punch and the plate die. The punch unit for processing a non-metallic sheet material according to claim 1.