JP2005177888A - Spacer, and slitter blade replacing method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spacer, and a slitter blade replacing method using the spacer allowing automatic blade replacement while preventing the chipping of a round blade. <P>SOLUTION: This spacer for fixing the round blade mounted to an arbor of a slitter has a portion capable of buckling, at least in part, and has such buckling characteristics that thickness is reducible by buckling of the portion capable of buckling when clamping pressure of predetermined buckling load or more is applied. The slitter blade replacing method uses the spacer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a spacer and a slitter blade changing method using the spacer. More specifically, the present invention relates to a blade slitter blade replacement method for cutting a very thin metal foil or the like in which the set interval in the axial direction between the upper and lower round blades may be zero or negative.

  Conventionally, slitter blade replacement has been done manually, and before the two round blades mounted on a pair of upper and lower arbors, which are rotating shafts, approach each other, an operator for blade replacement must use a clearance gauge. The interval in the axial direction between the two pairs of round blades is inspected, and the axial interval is adjusted to a predetermined value using paper or a thin resin film (see, for example, Patent Document 1).

Conventionally, various methods and apparatuses for automatically changing a round blade using a robot hand or the like have been proposed (see Patent Documents 2 to 4).
Here, in the shearing process using a slitter or the like, usually, when a steel plate is sheared, the axial interval (clearance) between the two round blades is set to 0 to 25%, preferably about 10% of the plate thickness. For example, when the plate thickness is 50 μm like a very thin metal foil, the target axial interval is about 5 μm.

  On the other hand, in setting the axial distance between the two round blades, there is an unavoidable error of several tens of μm due to a manufacturing error of the spacer thickness. Therefore, when the plate thickness is reduced, the error becomes larger than the set target value. In this case, the actual axial interval after setting may be negative. Furthermore, if the actual axial distance exceeds the allowable value due to an error, the set target value is shifted to the negative side in order to keep the maximum value within the allowable range. Furthermore, in the case of a relatively soft metal or non-metal shear, the axial interval between the round blades adversely affects the shear, so the axial interval is preferably zero (zero clearance). For example, the side surfaces of two round blades are brought into contact with each other so that the axial interval is zero, and the contact pressure (so-called side pressure) is adjusted to perform shearing. Various methods for adjusting the zero clearance of such a round blade have been proposed (see Patent Documents 5 to 6).

Japanese Patent Laid-Open No. 2-76614 JP 2002-283290 A JP 2002-160189 A JP 2002-239832 A JP-A-57-114315 JP-A-8-318494

  However, in the case of foil slitters for cutting thin metal foils, a pair of upper and lower arbors are fitted with round blades and spacers, and blade assembly is performed. When the two axes are moved closer, that is, when the upper and lower round blades are moved closer to each other in the radial direction, there is a problem in that the cutting edges come into contact with each other in a portion where the axial interval is zero or negative, and the cutting edges are lost. Therefore, when performing blade slitting of foil slitters by hand, it has a high level of skill. On the other hand, since high-precision work is required, automatic blade replacement can be performed using a conventional robot hand or the like. There wasn't.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a spacer capable of preventing the cutting of a round blade and capable of automatic blade replacement, and a slitter blade replacement method using the same.

  A buckling spacer according to claim 1 of the present invention is a spacer for fixing a round blade mounted on an arbor of a slitter, and has at least a part capable of buckling, and has a predetermined buckling load. When the above clamping pressure is applied, the buckling portion buckles, so that the thickness decreases, and a predetermined thickness as a spacer is obtained.

The spring spacer according to claim 2 of the present invention is a spacer for fixing a round blade mounted on the arbor of the slitter,
At least a part has an elastically deformable part, and has a spring characteristic that the thickness can be reduced by compressing the elastically deformable part when a clamping pressure is applied.

The slitter blade replacement method according to claim 3 of the present invention is a slitter blade replacement method using the buckling spacer according to claim 1,
a) A pair of upper and lower arbors, each equipped with a round blade, a spacer and the buckling spacer,
b) applying a first clamping pressure of the total buckling force of the buckling spacer from one end of the arbor to grip the round blade via the spacer and the buckling spacer;
c) By overlapping the pair of upper and lower arbors, the cutting edges of the round blades mounted on the pair of upper and lower arbors are overlapped in a predetermined amount in the radial direction while maintaining at least the axial interval by the first clamping pressure. ,
d) Applying a second clamping pressure equal to or greater than the total buckling force of the buckling spacer from one end of the arbor to buckle the bucklable portion of the spacer, thereby the pair of upper and lower arbors The cutting edge of the round blade mounted on the blade is caused to approach in the axial direction to an axial interval due to a second clamping pressure that is shorter than an axial interval due to the first clamping pressure.

Further, the spring spacer according to claim 2 is further attached to the arbor in addition to the buckling spacer according to claim 1,
After changing the clamping pressure to mainly buckle the buckling spacer according to claim 1 and changing the blade according to claim 3, the clamping force is further increased to increase the spring spacer according to claim 2. It is preferable that the axial distance between the upper and lower round blades can be adjusted by elastic deformation.

The slitter blade replacement method according to claim 5 of the present invention is a slitter blade replacement method using the spring spacer according to claim 2,
a) A pair of upper and lower arbors, each equipped with a round blade, a spacer and the spring spacer,
b) Applying a predetermined first clamping pressure from one end of the arbor to grip the round blade via the spring spacer;
c) By overlapping the pair of upper and lower arbors, the cutting edges of the round blades mounted on the pair of upper and lower arbors are overlapped in a predetermined amount in the radial direction while maintaining at least the axial interval by the first clamping pressure,
d) Applying a predetermined second clamping pressure larger than the first clamping pressure from one end of the arbor to elastically deform the elastically deformable portion of the spacer, thereby allowing the pair of upper and lower arbor to The cutting edge of the mounted round blade is made to approach in the axial direction to an axial interval due to a second clamping pressure that is shorter than an axial interval due to the first clamping pressure.

  Furthermore, it is preferable to use a round blade having a lateral force suppression mechanism, since excessive side pressure due to contact between the round blades can be alleviated.

  According to the present invention, after overlapping the upper and lower round blades in the radial direction with a sufficient axial interval, the spacer is buckled to narrow the axial interval between the round blades, The desired zero spacing or axial spacing can be negative. Therefore, it is possible to easily replace the blade slitter without losing the cutting edge of the round blade. Therefore, when performing manually, highly skilled is unnecessary, and automatic blade change is possible using apparatuses, such as an existing robot hand.

  Further, by further mounting a spacer having spring characteristics, it is possible to easily adjust the axial distance between the round blades after completion of blade replacement.

  Next, the spacer of the present invention and the slitter blade replacement method using the same according to the present invention will be described in more detail with reference to the drawings.

  The buckling spacer 1 used in the slitter blade changing method shown in FIGS. 1 and 2 is a spacer for fixing a round blade mounted on the slitter arbor, and is equidistantly provided on one side surface of the spacer body 2. In the four recesses 2a formed, buckling members 3 that can be buckled are embedded so as to protrude from the side surfaces of the spacer body 2 by a predetermined length.

  The spacer main body 2 can be made of, for example, steel (SKD, SKH, etc.). Note that the number of buckling members 3 may be increased or decreased in order to obtain predetermined performance.

  On the other hand, the buckling member 3 is made of a material having a structure and a buckling characteristic that buckles when a clamping pressure equal to or higher than a predetermined buckling load is applied and decreases by a predetermined thickness. Therefore, the buckling characteristics of the buckling member 3 are variously selected depending on the total buckling amount and the total buckling force and the magnitude of the spring constant which is the ratio of the two. As the material of the buckling member 3, for example, natural or synthetic rubber, synthetic resin such as MC nylon, non-ferrous metal such as bronze, steel or the like is adopted, and the shape (columnar shape, spring shape), size, number, etc. are selected. What is necessary is just to produce the buckling member 3 so that a required buckling characteristic may be provided.

A specific example is as shown in FIGS. 1 and 2, the buckling spacer 1 is a spacer in which a buckling member 3 made of ring-shaped MC nylon (compression elastic modulus 200 kgmm ² ) having a diameter of 10 mm is arranged at four locations on the side surface of the spacer body. It is. The total buckling amount Δt is set to 100 μm, and full buckling is achieved with a clamping force of about 1 ton. The clamping force is generated by applying pressure in the axial direction from a work side (left end in FIGS. 3 to 4) of each arbor A1, A2 by a conventionally known pressurizing means (not shown) such as hydraulic pressure. In addition, the right end of each arbor A1, A2 in FIGS. 3-4 is a drive side, and is connected to a conventionally well-known rotational drive source.

For example, the upper arbor A ₂ is lowered by lowering the upper arbor A ₂ in a state where the round blade is lightly clamped while maintaining a clamping pressure (first clamping pressure) of about 100 kg which is less than the total buckling force of the buckling spacer 1. if ask superimposed cutting edges, the axial spacing G ₁ adjacent the upper and lower round blade in the arbor downward shown in FIG. 3, the axial gap G at the slit shown in FIG. 4 (i.e., when cutting the steel sheet S) _A value 45 μm larger than ₂ can be maintained, and collision between the upper and lower round blades can be prevented.

If the upper and lower round blades are clamped by applying a clamping pressure (second clamping pressure) of 1 ton or more after the upper arbor A _{2 is} lowered, the buckling spacer 1 By buckling 1, the axial interval between the round blades becomes a predetermined axial interval G ₂ at the time of slitting.

  Here, the total buckling force refers to a force necessary for the buckling member 3 of the buckling spacer 1 to be completely buckled and no longer deformed.

Buckling spacer 1, in FIG. 3, a pair of upper and lower arbor A _1, A ₂ of the adjacent two round blade of each of the arbor, the outer blade interval B, ie, the upper and lower pair of arbor A _1, A ₂ Among the sections of two adjacent round blades arranged alternately, one is placed in each section where the round blade exists outside the slit plate, so that the clamping force is the total buckling of the buckling spacer 1. When the force is smaller than the force, the axial interval between the round blades is wide, and when the clamping force is increased more than the total buckling force, the axial interval between the round blades is reduced. For example, as shown in FIG. 3, in the lower arbor A ₁ , the buckling spacer 1 is disposed between the round blades C ₁₁ and C _12, and in the upper arbor A ₂ , the round blades C ₂₂ and C ₂₂ are arranged. _A buckling spacer 1 is arranged between the two.

In addition to the buckling spacer 1, a plurality of conventionally known spacers P are disposed on the pair of upper and lower arbors A ₁ and A ₂ .

The purpose of using the buckling spacer 1 is that when the upper arbor A ₂ is lowered in the direction of the lower arbor in order to obtain the overlap (lap) of the upper and lower round blades necessary for shearing after the blade replacement, the upper and lower round blades are used. This is to ensure an axial interval that does not cause the blade tip to collide. The buckling spacer 1 is fully buckled with a low clamping force (10 to 20% of the maximum clamping force), and the spacer thickness when the clamping force is not applied is necessary to avoid collision than during full buckling. A buckling characteristic that is thicker by the axial interval is given, and the spring characteristic is lost when the buckling is complete. After blade replacement completion, (5% for example up to the clamping force) lightly clamped to lower the upper arbor A _2. After lowering, the buckling spacer 1 is completely buckled by increasing the clamping force (for example, 20% or more of the maximum clamping force). Thereby, the problem that the upper and lower round blades at the time of blade replacement collide and are broken is solved.

For example, if the upper arbor A ₂ is lowered while the round blade is lightly clamped while maintaining a clamping pressure of about 100 kg and the blade tips of the upper and lower round blades are overlapped, the adjacent arbor descending shown in FIG. The axial distance G ₁ between the upper and lower round blades is 45 μm larger than the axial distance G ₂ at the time of slitting (that is, when the steel sheet S is cut) as shown in FIG. Can do.

After that, if the upper and lower round blades are clamped by applying a clamping pressure of 1 ton or more, the above-mentioned buckling spacer 1 is buckled, so that a predetermined axial interval G ₂ at the time of slitting is obtained and adjacent to each arbor. The distance between the two round blades in the axial direction is a predetermined dimension.

Further, in the present embodiment, in addition to the buckling spacer 1, it has an elastically deformable portion. When a clamping pressure is applied, the elastically deformable portion is compressed to reduce the thickness. Spring spacers 5 having spring characteristics that can be mounted are mounted on the upper and lower arbors A ₁ and A ₂ .

  The spring spacer 5 shown in FIGS. 5 to 6 is a spring spacer in which a steel spacer is hollowed out on both sides and has a thickness of 4 mm and a radius difference of 10 mm as a whole having a disk spring shape. The displacement Δt with a clamping force of 10 tons is about 50 μm. For example, if the slit can be formed at 5 ton or more and 10 ton or less, the distance Δt between the outer peripheral edge and the inner peripheral edge of the spring spacer can be adjusted in the range of 25 to 50 μm. If one such spring spacer 5 is inserted into, for example, the outer blade section B or the inner blade section N having a smaller axial distance between two adjacent round blades, the axial distance adjustment by changing the clamping force is performed. The range is 12.5 μm.

The spring spacer 5 according to the present embodiment changes the clamping pressure based on the shearing result of the slitter and elastically deforms the spring spacer 5, so that the axial distance G ₂ between the round blades mounted on the pair of upper and lower arbors is increased. it can be adjusted, as a result, the axial spacing G ₂ sequentially, can be adjusted to the optimum value.

  Here, the difference between the spring spacer 5 and the buckling spacer 1 is a difference in purpose of use, and other structural differences are not particularly limited in the present invention. In the present invention, when a round blade slits a plate, a spacer in a spring state having a recoverable spring characteristic is called a spring spacer, and it is used in a state in which it is buckled completely due to a clamping force and loses its spring characteristic. These spacers are distinguished by being called buckling spacers.

An object of the Banesupesa 5, the axial spacing G ₂ between the upper and lower round blade by adjusting the shear in the clamping force is to be changed in a desired value. The total buckling force is made substantially equal to the maximum clamping force, and the total buckling amount is determined from the range in which the axial interval G ₂ is to be adjusted.

For example, if the spring spacer 5 is inserted into the outer blade sections B ₁ and B ₂ , the axial distance G ₂ decreases as the clamping force increases, and conversely, as shown in FIG. 4, the inner blade sections N ₁ and N ₂ The axial distance G ₂ is increased by increasing the clamping force.

  The spring characteristics of the spring spacer 5 are variously selected depending on the magnitude of the spring constant. As the material of the spring spacer 5, a synthetic resin such as plastic, a non-ferrous metal such as brass, steel, or the like is adopted, and the spring spacer 5 may be manufactured so as to provide the necessary spring characteristics by selecting the shape, dimensions, and the like. . Further, as in the present embodiment, the spring spacer 5 as a whole may have spring characteristics, or a spring characteristic may be provided by arranging a coil spring, a leaf spring, or the like in part of the spring spacer.

As described above, the spring spacer 5 can be used in combination with the buckling spacer 1, but if the shear side reaction force is small and can be ignored compared to the clamping force, the spring spacer 5 can be used alone. . Specifically, this is possible in the following two cases.
1. When the clearance is large and the operation to avoid collision between the upper and lower round blades (hereinafter referred to as collision avoidance operation) is unnecessary, and only the clearance adjustment at the time of slitting is required.
2. When performing collision avoidance with a spring spacer. However, in this case, the spring spacer is inserted into the outer blade section.

  When the collision avoidance operation is performed with the second spring spacer, the slitter blade can be replaced as follows.

That is, the slitter blade replacement method using the spring spacer alone is as follows: a) Each of the upper and lower arbors is equipped with a round blade and a spring spacer (at this time, the spring spacer is inserted into the outer blade section),
b) Applying a predetermined first clamping pressure from one end of the arbor to grip the round blade via a spring spacer;
c) by overlapping the predetermined amount in the radial direction while maintaining at least the first axial interval between the cutting edges of the round blades mounted on the pair of upper and lower arbors by reducing the distance between the pair of upper and lower arbors,
d) Affixed to the pair of upper and lower arbors by applying a predetermined second clamping pressure larger than the first clamping pressure from one end of the arbor and elastically deforming the elastically deformable portion of the spring spacer. By changing the cutting edge of the round blade in the axial direction to the axial interval by the second clamping pressure, which is shorter than the axial interval by the first clamping pressure, the blade is replaced while avoiding the collision of the upper and lower round blades. The clearance can be adjusted during shearing.

  If two upper and lower round blades are overlapped at a negative axial interval, the round blade and the spacer are pressed against each other to elastically deform the round blade and the spacer. The round blade and the spacer are made of a material having high rigidity for the purpose of use, and generate a large reaction force even with slight elastic deformation. This reaction force becomes excessive side pressure (so-called side pressure), which causes abnormal wear and fatigue failure of the cutting edge.

  Therefore, in the present embodiment, as shown in FIGS. 7 to 8, the protruding flange portion 12 in the vicinity of the slit 11 of the round blade 10 is formed by forming the slit 11 on the outer periphery of the round blade 10. . The collar portion 12 is elastically deformed with a relatively weak lateral pressure, so that the pressure acting on the side surface of the round blade 10 can be suppressed. Therefore, automatic handling with a conventionally known robot hand can be easily performed.

  Hereinafter, more specific examples of the slitter blade replacement method using the buckling spacer of the present invention will be described.

1. Slitter specification arbor diameter: 180mm
Round blade: 10mm thick x 280mm outer diameter
Axial clamping force: Maximum 10 tons shearable clamping force: Approximately 3 tons

2. Buckling spacer (with the shape shown in Figs. 1 and 2)
Area: 264 mm ² [4 × π (10 ² −4 ² ) / 4]
Young's modulus: 160 kg / mm ² [MC nylon]
Buckling amount: 150 μm [Protrusion amount of buckling member from side surface of spacer body]
Buckling compression ratio: 0.03 [150 μm / 5 mm]
Buckling force: 1426kg [264 × 180 × 0.03]
how to use :

(1) When changing the blade, insert one buckling spacer in each outer blade section. After clamping the blade, when clamped at about 0.5 tons, the buckling member is compressed by about 50 μm, the amount of protrusion of the buckling member from the side surface of the spacer body becomes 100 μm, and the two axial intervals between the outer blade sections are all The width became 50 μm wider than that during buckling.

(2) The upper arbor assembled in this state is brought close to the lower arbor assembled in the same manner, and the upper and lower round blades are overlapped by a predetermined amount. Finally, increase the clamping pressure. When the clamp pressure exceeds 1426 kg, the axial distance G ₂ between the upper and lower round blades becomes a predetermined value.

(3) Shearing is performed with a clamping force greater than the total buckling force. The slitter arbor has a length that allows a blade set with the maximum plate width. When the plate width is narrow, spacers and the like are also arranged on the portion where there is no plate. This portion is referred to as “outside of the plate”, for example, the portion of the outboard outer blade section B _out and the outboard outer blade section N _out shown in FIG. Since there is only one clearance in the outer blade section _Bout shown in FIG. 4, the spring constant is doubled (the number of buckling members on the side of the spacer is doubled), and the protrusion amount of the buckling member Is inserted in half. Thereby, when the clamping pressure exceeds 1426 kg, the axial interval between the upper and lower round blades becomes a predetermined value.

It is a front view of the buckling spacer which shows one Embodiment of the spacer of this invention. It is an expanded sectional view of the spacer of FIG. It is a figure for demonstrating an example of the blade replacement method using the buckling spacer of FIG. 1, Comprising: It is explanatory drawing which shows the state before a buckling spacer buckles. It is explanatory drawing which shows the state which buckled the buckling spacer of FIG. It is a front view of an additional spring spacer. It is an expanded sectional view of the spring spacer of FIG. It is a front view of the side pressure control round blade which shows an example of a round blade. It is an expanded sectional view of the spring spacer of FIG.

Explanation of symbols

1 Buckling spacer 2 Spacer body 3 Buckling member 5 Spring spacer

Claims (5)

A spacer for fixing the round blade mounted on the slitter arbor,
A buckling characteristic that has a buckling part at least in part, and can be reduced in thickness by buckling the buckling part when a clamping pressure higher than a predetermined buckling load is applied. A buckling spacer having. A spacer for fixing the round blade mounted on the slitter arbor,
A spring spacer having at least a portion that can be elastically deformed, and having a spring characteristic that can be reduced in thickness when the elastically deformable portion is compressed when a clamping pressure is applied. A slitter blade replacement method using the buckling spacer according to claim 1,
a) A pair of upper and lower arbors, each equipped with a round blade, a spacer and the buckling spacer,
b) Applying a first clamping pressure less than the total buckling force of the buckling spacer from one end of the arbor to grip the round blade via the spacer and the buckling spacer;
c) By overlapping the pair of upper and lower arbors, the cutting edges of the round blades mounted on the pair of upper and lower arbors are overlapped in a predetermined amount in the radial direction while maintaining at least the axial interval by the first clamping pressure. ,
d) Applying a second clamping pressure equal to or greater than the total buckling force of the buckling spacer from one end of the arbor to buckle the bucklable portion of the spacer, thereby causing the pair of upper and lower arbors A slitter blade replacement method, wherein the cutting edge of a round blade mounted on the blade is caused to approach in the axial direction to an axial interval by a second clamping pressure shorter than an axial interval by the first clamping pressure. The spring spacer according to claim 2 is further attached to the arbor in addition to the buckling spacer according to claim 1,
After changing the clamp pressure to mainly buckle the buckling spacer according to claim 1 and changing the blade according to claim 3, the clamping force is further increased to change the spring spacer according to claim 2. A slitter blade replacement method that can be elastically deformed to adjust the axial distance between the upper and lower round blades. A slitter blade replacement method using the spring spacer according to claim 2,
a) A pair of upper and lower arbors, each equipped with a round blade, a spacer and the spring spacer,
b) Applying a predetermined first clamping pressure from one end of the arbor to grip the round blade via the spring spacer;
c) By overlapping the pair of upper and lower arbors, the cutting edges of the round blades mounted on the pair of upper and lower arbors are overlapped in a predetermined amount in the radial direction while maintaining at least the axial interval by the first clamping pressure,
d) Applying a predetermined second clamping pressure higher than the first clamping pressure from one end of the arbor to elastically deform the elastically deformable portion of the spacer, thereby causing the pair of upper and lower arbor to A slitter blade replacement method, wherein the cutting edge of a mounted round blade is axially approached to an axial interval by a second clamping pressure shorter than an axial interval by the first clamping pressure.

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