JP2005001012A - Rotary cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the cutting capacity (speed and accuracy) of a rotary cutter while extending the service life of a cutting edge, to cut out and cut various workpieces such as metallic foil difficult in a conventional technology and to efficiently eliminate so-called burrs conventionally regarded as a problem. <P>SOLUTION: Tension is applied in the width direction of the workpiece when cutting. The force of tearing the workpiece can be small by applying tension from the width direction to suppress the wear of the cutting edge, and a hard-to-cut material can be cut. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is an invention relating to a rotary cutter used for cutting various strip-like and cloth-like materials such as nonwoven fabric, paper, and metal foil.
[0002]
[Prior art]
Unlike the conventional cutting method by reciprocating a mold or the like, the rotary cutter has a continuous movement, and it is easy to increase the processing speed.
[0003]
When processing with a conventional punching die instead of a rotary cutter, it is a thin, highly ductile continuous plate-like, cloth-like or plate-like material to be cut (hereinafter referred to as "work"), especially thickness It is difficult to cut a workpiece of 0.01 mm or less. When these are to be cut, so-called burr, burr, etc. will occur unless the gap (clearance) between the punch and the die is close to zero. However, punches and dies with a clearance close to 0 are difficult to manufacture, and when used as a punching die, the machine itself is required to have high accuracy, and the life of the punch and die is long. It is not practical because it is significantly shorter.
[0004]
On the other hand, in the case of a rotary cutter, it is relatively easy to cut out a thin workpiece. However, in the case of a rotary cutter, the cutting method is different from a punching die, so that the workpiece is crushed and broken so that it is a so-called push cutting. Therefore, it is usually difficult to cut and separate a highly ductile workpiece.
About this rotary cutter, blade material, blade shape, structure of roll with blade (hereinafter referred to as “die cutter”) and receiving roll without blade (hereinafter referred to as “anvil roll”) Have been devised, and a number of inventions have been made.
[0005]
As a result, various problems such as cutting, cutting speed and cost, workable cutout, and workpiece machining accuracy have been solved. Currently, the most problematic issues are cutting highly ductile workpieces and blade life. And problems with the generated burrs.
[0006]
As shown in FIG. 1, the rotary cutter mechanism is formed by so-called “push cutting” in which a workpiece is pressurized by a roll blade and an anvil, and the pressurized portion and the structure of the workpiece continuous with the portion are separated by pressure. Cutting and cutting by push-cutting have the advantage that the blade and anvil roll have a long life because it is not necessary to make the cross-section of the blade as sharp as a knife or cutter.
[0007]
However, rotary cutters are rarely used at present for materials that are difficult to cut, such as nonwoven fabrics and metals. The reason for this is that these materials are difficult to be processed by cutting and cutting by press cutting, so the pressure applied to the blade is increased, the life of the blade is remarkably shortened, and so-called burrs and burrs that occur during press cutting remain remarkably. It is.
[0008]
For this purpose, Patent Document 1 and the like have shown a device for making the tension in the moving direction of the workpiece constant in order to perform cutting with high accuracy under constant conditions as much as possible by adjusting the cutting conditions. There is not enough ingenuity to cut and cut efficiently.
[Patent Document 1] Japanese Utility Model Publication No. 3056792
[Problems to be solved by the invention]
An object of the present invention is to improve the cutting ability (speed, accuracy) of the rotary cutter, extend the life of the blade, and perform various workpiece cutting and cutting which have been difficult with the prior art. Another object of the present invention is to efficiently remove so-called burrs and burrs, which have been problems.
[0010]
[Means for Solving the Problems]
The present invention described in claim 1 is a necessary part as a product by cutting out a strip-shaped or plate-shaped workpiece so as to be sandwiched between two rotating bodies each having a cutting blade on at least one side. In a rotary cutter intended to be separated into products and trim which is unnecessary scraps, a rotary cutter is characterized in that tension is applied in the width direction of the workpiece.
[0011]
The present inventor investigated the processing by the rotary-type push cutting, and obtained the following knowledge.
(1) As shown in FIG. 2, in the press-cut process, a part of the blade pressure 6 applied perpendicularly to the workpiece is decomposed into a force 7 perpendicular to the workpiece 3 and a force 8 spreading forward and backward of the workpiece ( 2) As shown in FIG. 3, the crack 9 that first enters the workpiece progresses almost perpendicularly to the thickness direction of the workpiece, and the workpiece is cut from there. (3) The force spreading before and after the workpiece follows the crack. Playing the role of tearing [0012]
The inventor has focused on the force 8 that spreads before and after the workpiece, and invented a method that makes cutting easier by increasing this force. That is, the work that is not easily cut is because the force 8 spreading before and after the work is small, and is a method that facilitates cutting by applying the force from outside the blade edge.
[0013]
In general, a rotary type cutting and cutting apparatus has a shape as shown in FIG. The force 8 for spreading the workpiece back and forth corresponds to a force for pulling the workpiece with respect to the traveling direction at a portion where the blade as shown in FIG. The tension can be controlled by an apparatus for collecting a workpiece supply portion or a workpiece that has been cut out and cut.
On the other hand, in the portion where the blade as shown in B in FIG. 4 is nearly parallel to the workpiece traveling direction, the tension cannot be controlled by the workpiece supply portion or the device for collecting the workpiece. Therefore, it is necessary to apply tension by a mechanism that is not conventional as in the present invention.
By applying tension, the workpiece receives a tearing force. Because the blade receives a pulling force before and after the crack is generated, the workpiece that has been difficult to cut and cut can be processed at a pressure much lower than the pressure applied to the workpiece. The lifespan of can be greatly extended. In addition, the life of the blade can be further extended for workpieces that have been easily cut, and costs for replacement, maintenance, blade re-polishing, and the like can be reduced.
[0014]
In addition, since the generated crack propagates substantially perpendicularly to the workpiece thickness direction, the burr portion can be attached to the cutting waste side by controlling the position where the crack is initially generated. By applying tension during cutting and determining the cross-sectional shape of the blade, it is possible to more easily control the occurrence of cracks and solve the burr problem. The present invention described in claim 2 is the rotary cutter according to claim 1, further comprising a mechanism for applying tension to at least one roll in the width direction of the workpiece. According to a third aspect of the present invention, there is provided the rotary cutter according to the second aspect, wherein the mechanism for applying tension in the width direction of the workpiece is a convex portion in contact with the trim of the workpiece. As shown in FIG. 5, by having a member that applies tension to the surface of the roll in a certain direction, it is possible to apply a certain force in the width direction of the workpiece during the rotation of the roll. As shown in claim 3, it is inexpensive to use an organic material such as elastic rubber, resin, plastic, etc. as a member for applying tension as shown in claim 3, but considering the balance of tension, usage environment, processing accuracy, etc. As shown in FIG. 6, the bearing is arranged with an angle θ on the roll, the resin protrusion is arranged as shown in FIG. Various methods can be used, such as adding.
[0015]
The tension in the width direction of the workpiece frequently changes depending on the processing conditions, the environment of the device, the state of the workpiece, the wear of the cutter blade edge, and the like. For that purpose, the height of the base of the device to which tension is applied by the screw, taper block, and spring for tension adjustment as shown in FIGS. 12 and 13 is changed, or the tension applying material itself is changed to adjust the tension. It becomes important. By adjusting and keeping the tension constant, the workpiece can be processed stably.
[0016]
Further, by making it possible to replace the member that applies tension, it is possible to stably apply tension to the workpiece at low cost. In particular, it is economical to replace only the part that is always in contact with the workpiece.
[0017]
Although the above has described the case where the roll has a mechanism for applying a tension in the width direction at the time of cutting, there are also forms such as those shown in FIGS. 8 and 9 in which a device for applying an outward tension to a portion other than the cutting roll is mounted. Is possible.
[0018]
According to a fourth aspect of the present invention, in the rotary cutter according to the third aspect, the convex portion is made of any one of rubber, resin, and plastic. When the workpiece is cut and cut, the member that applies tension in the width direction of the workpiece has elasticity, so that when the workpiece is cut and cut with less force, it faces outward in the direction perpendicular to the horizontal plane The member that applies tension to the elastic member causes elastic deformation, and the force is easy to control. Moreover, since it has elasticity, even if it contacts with a workpiece | work, a damage | wound etc. will not enter a workpiece | work. Moreover, since it has elasticity, it can reduce friction with the roll of the side to contact, and can suppress wear of both.
[0019]
The present invention according to claim 5 has a member that suppresses deformation of the product of the workpiece during cutting by contacting the product of the workpiece with at least one roll and applying pressure to the workpiece. A rotary cutter according to any one of claims 1 to 4. The rotary cutter for applying tension in the workpiece width direction according to the present invention described in claim 1 to claim 4 may cause wrinkles in the workpiece due to the tension in the workpiece material and cutting conditions, thereby reducing the quality of the workpiece cutting portion. is there. Therefore, this invention presses a deformation | transformation by contacting a workpiece | work with a roll and applying the pressure from a perpendicular direction to a workpiece | work. If tension is applied to the workpiece, the workpiece can be processed in the same manner regardless of the presence or absence of deformation.
[0020]
According to the sixth aspect of the present invention, the member for adjusting the pressure or height applied to the workpiece product using any one or more of the taper block, the height adjusting screw, and the spring is provided on the roll side peripheral surface. A member that suppresses the deformation of the product is placed on it, and the position of the member that suppresses the deformation of the product is moved up and down in the radial direction of the roll to adjust the pressure or height applied to the product of the workpiece. The rotary cutter according to claim 5. The height can be adjusted with screws or spacers. Wear due to excessive pressure, loss of power and vibration of equipment can be prevented, and if the pressure is too low, wrinkles will enter the workpiece. These problems can be solved by adjusting the height.
[0021]
According to the seventh aspect of the present invention, the member that suppresses deformation of the workpiece product during cutting that is in direct contact with the product is screwed onto the roll side peripheral surface, bolted, adhered, fitted, and clamped by a jig. The rotary cutter according to claim 5, wherein the rotary cutter is provided by at least one of adsorption by magnetic force and vacuum adsorption. It is. By manufacturing with a replaceable material or structure, more stable pressurization can be obtained at a low cost.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
The rotary type cutting and cutting device of the present invention can be obtained by adding a mechanism for applying tension in the width direction of the workpiece when the workpiece is processed by the current rotary cutter.
The mechanism is roughly classified into two types.
One of them is a method of giving the mechanism to the roll. There are various forms of this, but it can be broadly divided into a method of generating tension consisting of component forces acting in the direction perpendicular to the rotation direction by making the pressure applied to the roll center and roll ends uneven by rotation, and rotation. Regardless of the method, the tension is continuously applied by the function of the member itself. FIG. 6 shows an embodiment in which a saddle type bearing is placed on a roll in order to obtain tension by making the pressure applied to the roll center and roll ends uneven by rotation. This shows the same function as when a pull is applied directly in the outward direction because the rotational force of the roll is partly distributed to the tension acting in the width direction of the workpiece. As a method for continuously applying tension by the action of the member itself regardless of rotation, a method using an organic material having elasticity as shown in FIG. 5 is the most inexpensive and suitable. For example, if hard rubber is used as the organic material, replacement is easy and inexpensive, and the material such as resin, plastic, or metal is not limited as long as the material has elasticity without damaging the workpiece. Further, by devising the shape, the mounting angle, etc., the same effect can be obtained with any organic material having strength, elasticity, and wear resistance.
[0023]
Another method is to provide a mechanism for generating tension in a portion other than the roll as shown in FIGS. Tension adjustment is easy and is most suitable when you want to set the tension strictly.
Moreover, the member which suppresses a deformation | transformation of a workpiece | work can be obtained by providing on the die cutter the member which applies a pressure to a workpiece | work like 36 in FIG. Further, depending on the shape of the workpiece, it can be provided on the anvil.
[0024]
The effects of the present invention will be described in more detail with reference to the following examples.
[0025]
【Example】
(Example 1)
The present invention was applied to an experimental apparatus for cutting out a 10 mm × 10 mm square component from a copper foil (thickness 10 μm, pure copper) as a workpiece.
In the apparatus used for the experiment, one of the two rolls is a die cutter and the other is an anvil roll. A pair of these rolls was incorporated into a box-shaped frame, and a pressure was applied to press the anvil roll against the die cutter with hydraulic pressure to produce a rotary cutting machine having a mechanism capable of adjusting the cutting load. The blade material was a cemented carbide with HRA hardness of 92.
The roll diameter was set to φ100 mm, and the roll was rotated manually with a handle. The work flow direction tension was not applied to the work, and the work force flow direction driving force was determined by the friction force between the work and the anvil roll surface.
When performing the cutting process, as shown in FIG. 10, a hard rubber is applied to a portion closer to the roll end than the cutting edge on the die cutter as a means for realizing a mechanism as a rotary cutter that applies tension in the width direction of the workpiece of the present invention. The provided device was produced.
During use, the work can continue to be given outward tension in the width direction of the work by the elasticity of the rubber.
In the apparatus of the present invention, when the cutting load was 940 N and the workpiece was passed between both rolls, the workpiece passed between the rolls was completely cut and separated and discharged.
[0026]
(Comparative Example 1)
The experiment was conducted by removing the hard rubber member from the apparatus used in Example 1 under exactly the same conditions as in Example 1.
As a result, when the cutting load was 940 N, the workpiece remained after being compressed by the blade, but was not cut. When the cutting load was increased to 1200N, the workpiece could be partially cut, but it was not ejected in a completely separated state. To separate the workpiece into a necessary part and an unnecessary part, it was not necessary to tear it again by hand. I didn't. After that, an attempt was made to further increase the cutting load, but chipping occurred at the cutting edge of the die cutter, resulting in damage to the tool.
[0027]
(Example 2)
An embodiment in which a tension adjusting mechanism shown in claim 5 is added to the same apparatus as that of the first embodiment will be described.
If it is necessary to increase the outward tension at right angles to the horizontal plane depending on the shape of the workpiece, the workpiece may be displaced or the roll may be damaged. In particular, in the case of a workpiece shape that is asymmetrical in the workpiece traveling direction as shown in FIG.
Therefore, using the adjusting screw as shown in FIG. 12, the height of the base to which the hard rubber was attached was changed, and the force with which the rubber pressed the unnecessary part of the work was adjusted. As a result, the magnitude of the tension was adjusted so that the optimum tension was always applied to the cut portion. In addition, the used die cutter can be regenerated by reducing the roll diameter again by about 0.3 mm and polishing the blade edge, but at that time, it can be used without replacing the mechanism for applying tension. It was.
Further, the same effect can be obtained by adjusting a wedge-shaped member as shown in FIG. 13 instead of the adjusting screw.
[0028]
Example 3
In the test apparatus described in Example 1 and Example 2, the base part has a structure that can be easily replaced by a clamp method as shown in FIG. 14 so that only the rubber part can be replaced.
With this apparatus, the driving method was changed from that of Example 1 with a cutting load of 940 N, and the same cutting was performed with an electric apparatus. When the hard rubber was observed after 10 million revolutions, the rubber tip was worn by 0.3 mm. The tension at the time of cutting was slightly lower than before cutting, and for this reason, a workpiece that could not be cut sufficiently appeared from about 9.9 million revolutions.
Therefore, when the clamp was loosened and only the rubber was replaced, the state returned to the state unchanged from the initial state of cutting, and good processing of 9 million revolutions or more was possible.
[0029]
(Example 4)
The present invention described in Example 1 to Example 3 can provide a great effect on a thin and ductile material that is difficult to cut, but at the same time, when a thin work is applied, it tends to cause wrinkles. This phenomenon is particularly noticeable when the workpiece is thin or the material is easily deformed.
When a wrinkled workpiece is cut, the cut portion becomes a rough shape, and the cut workpiece loses product value.
Therefore, in the present embodiment, a member that suppresses deformation of the product part is provided for the purpose of ensuring sufficient cutting ability without causing wrinkles on the workpiece even if the workpiece is thin or easily deformable. It was.
In a die cutter that cuts out a thin-film electrode part made of an aluminum foil having a thickness of 5 μm and a width of 200 mm in an asymmetric shape as shown in FIG. 11, as shown in FIG. The member which contacted, added pressure to the workpiece | work, and suppressed the deformation | transformation of the required part of the workpiece | work at the time of a cutting | disconnection was provided. This mechanism has a split circular tube shape having an inner radius of curvature that is 1 mm larger than the outer radius of curvature of the die cutter roll, and is fastened to the die cutter by a mounting bolt. In addition, the surface of this mechanism is bonded with a 1 mm thick urethane sheet with a removable adhesive so that the workpiece will not be damaged when pressed, and the urethane sheet is devised so that it can be replaced if the urethane sheet is damaged. . In addition, an adjustment bolt is provided on the base so that the height can be adjusted so that the amount of pressing force can be adjusted. As a result, the aluminum foil having a thickness of 5 μm was successfully cut easily by applying tension only to the unnecessary portion without bringing wrinkles to the product portion.
[0030]
(Example 5)
When the workpiece was cut as a 10 μm resin sheet using the same apparatus as in Example 1, good cutting was possible without deformation or wrinkles.
[0031]
(Example 6)
The same experiment as in Example 1 was performed by changing the blade material and experimenting what kind of material is suitable as the blade tip. The evaluation was performed based on whether or not a good cutting without any uncut portion could be maintained for a long time.
As a result, the material of the blade is a cemented carbide made of a WC-based material having a Vickers hardness of HV900 or more, ceramics based on any of alumina, alumina-titanium carbide, zirconia, silicon carbide, or silicon nitride of HV900 or more. By using any one or more of die steel, high speed steel, and stainless steel of HV500 or higher, good cutting could be performed.
[0032]
【The invention's effect】
The rotary cutter of the present invention has the following effects.
(1) Sheets such as non-woven fabric, metal foil, and resin, which have been difficult to process with conventional rotary cutting and cutting machines, can be cut and cut.
(2) When the same processing as that of a conventional rotary type cut-out and cutting machine is performed, the life of the cutting edge can be greatly increased, and the cost reduction effect is great.
(3) Compared with a conventional rotary type cut-out and cutting machine, it becomes possible to easily control the generated burrs and improve the accuracy of the processed workpiece.
[Brief description of the drawings]
1 shows a schematic diagram of rotary cutting, workpiece cutting by a cutting machine, and cutting. FIG. 2 shows a cutting mechanism of push cutting with a rotary cutter. FIG. 3 shows a schematic diagram of crack generation. Schematic diagram of a die cutter blade. FIG. 5 shows an example of a roll surface having a member that exerts tension in a certain direction according to the present invention. FIG. 6 shows a roll having a bearing on the surface of the present invention. Fig. 8 shows an example of a cutting machine equipped with a device for applying outward tension to a portion other than the roll of the present invention. Fig. 9 shows a portion other than the roll of the present invention. Fig. 10 shows an example of a cutting machine on which a device for applying an outward tension is placed. Fig. 10 shows a device provided with hard rubber in a portion closer to the end side than the roll-shaped blade portion. Asymmetrical work direction Fig. 12 shows a mechanism for adjusting the tension of a hard rubber using an adjusting screw. Fig. 13 shows a mechanism for adjusting a tension using a taper block. Fig. 14 shows a hard that can be replaced by a clamp method. Fig. 15 shows an example of a device that suppresses deformation of a necessary part of a workpiece after cutting.
DESCRIPTION OF SYMBOLS 1 Die cutter 2 Anvil roll 3 Workpiece 4 Roll rotation direction 5 Blade 6 Force to press against the counterpart roll 7 Component force to the direction to press against the counterpart roll 8 Component force in the direction to pull and divide the workpiece 9 Generated crack 10 A Blade A portion 11 B near a right angle toward the workpiece traveling direction 11 B A portion whose blade is nearly parallel to the workpiece traveling direction 15 A member 16 that applies tension in the width direction of the workpiece to the workpiece 16 is pulled by the workpiece Direction 23 Bearing 23 Resin protrusion 25 Rotating body 26 as an example of a mechanism for pulling the work Power transmission belt 27 Rotating body 28 for applying a tension in the width direction of the work to the work Hard rubber 29 Advancing direction 30 of the work Cutout mark 31 Adjustment screw 32 Taper block adjustment knob 33 Taper block 34 Clamp member 35 Lamp adjustment screw 36 Urethane pad

Claims (7)

A strip or plate-shaped workpiece is cut out so as to be sandwiched between two rolls having a cutting blade on at least one side, and a product which is a necessary part as a product and a trim which is an unnecessary scrap In a rotary cutter intended to be separated into
A rotary cutter that applies tension in the width direction of the workpiece. The rotary cutter according to claim 1, further comprising a mechanism that applies tension to at least one of the rolls in the width direction of the workpiece. The rotary cutter according to claim 2, wherein the mechanism for applying tension in the width direction of the workpiece comprises a convex portion in contact with the trim of the workpiece. The rotary cutter according to claim 3, wherein the convex portion is made of an elastic body. 5. The member according to claim 1, further comprising a member that suppresses deformation of the product of the workpiece during cutting by contacting the product of the workpiece with at least one roll and applying pressure to the workpiece. A rotary cutter according to Crab. A member for adjusting the pressure or height applied to the workpiece product using one or more of a taper block, a height adjusting screw, and a spring is provided on the roll side peripheral surface, and the product is deformed thereon. 6. The pressure or height adjustment applied to the product of the workpiece is performed by placing a member to be suppressed and moving the position of the member to suppress the deformation of the product up and down in the radial direction of the roll. Rotary cutter. A member that suppresses deformation of the product of the workpiece that is in direct contact with the product is screwed onto the roll side peripheral surface, bolted, bonded, fitted, clamped by a jig, magnetically attracted, or vacuum attracted The rotary cutter according to claim 5, wherein the rotary cutter is provided by one or more methods.

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