JP2000288991A - Method and device for bending and cutting band blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for bending and cutting a band blade to effect bending and cutting of the band blade in one and the same home position and in a lump, improve bending and cutting precision, and further also perform straight cutting and square cutting of front and rear ends. SOLUTION: This device comprises a fixed shaft 1 in which a cutting slit 1a and a bending slit 1b are formed in an interconnected state; a machining cylinder 2 rotatably and simultaneously vertically slid fitted externally of the fixed shaft 1 and provided with a cutting machining part 3a and bending machining part 3b, corresponding to the cutting slit 1a and the bending slit 1b, respectively; and a cutting outer cylinder 5 rotatably fitted in a vertically slidable manner externally of the machining cylinder and having a front cutting weir 5a to effect rear end cutting machining of the band blade in cooperation with the cutting machining part 1a. In cooperation with the cutting slit 1a of the fixed shaft 1, the cutting machining part 3a of the machining cylinder 2, and the front cutting weir 5a of the cutting outer cylinder 5, cutting of the rear end of a band blade B and straight cutting of the front end of a band blade B to be subsequently machining are carried out. In coordination with the bending slit 1b and the bending machining part 3b, the band blade B is bent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for bending and cutting a band blade used in a punching die for punching a sheet material such as paper, cardboard, plastic film and the like.

[0002]

2. Description of the Related Art A blanking die for punching a sheet material is:
As shown in FIG. 11 (a), a band blade B obtained by bending a wooden mold Aa serving as a support of the punching die A into a predetermined shape and having a predetermined length from the surface of the wooden mold Aa. It is configured to be embedded only.

A groove Ab for embedding a band blade B is formed in a wooden mold Aa while providing a predetermined non-groove portion Ac. The non-groove portion Ac is provided because, for example, if a groove having a closed curve, such as a gourd shape as shown in this figure, is continuously formed, the inside surrounded by the groove falls off.

[0004] The band blade B, which is bent in accordance with the shape of the groove Ab, is provided with B1, B2, B3 for convenience of processing.
Etc., and are integrated by embedding in a wooden mold Aa. Therefore, there should be no unnecessary gaps in the seams. Further, a bridge recess Bd is provided in accordance with the non-groove portion Ac of the wooden form Aa.

FIG. 11 (b) shows the split band blade B of FIG. 11 (a).
1 and B2 when viewed from the side, and as can be seen from this figure, the direct joining portion Bb of the split band blades B1 and B2
Is formed with a gradient at a predetermined angle so that a predetermined gap is formed on the side opposite to the blade when the blade Ba contacts. This is to prevent the connecting portion other than the blade portion Ba from becoming an obstacle and forming a gap in the blade portion Ba when the split band blades B1, B2, and the like are embedded in the groove Ab of the wooden mold Aa.

FIG. 11 (c) shows the split band blade B of FIG. 11 (a).
When the orthogonal connecting portion of 3 and B2 is viewed from the side of the split band blade B2,
The split band blade B2 appears as a cross section. In this case,
The end face of the divided band blade B3 is directly formed with the joining portion Bb for the above-described reason, and furthermore, between the blade portion Ba of the divided band blade B3 and the blade portion Ba of the divided band blade B3 which is orthogonally contacted. The corner joint Bc is formed so that no gap is formed in the rectangular joint.

Therefore, in order to embed the band blade B in the wooden mold Aa and use it as the cutting die A, not only the band blade B is bent into a desired shape but also the divided band blades B1, B2, etc. In order to prevent the formation of a gap between them, a straight cut is made to a predetermined length, and the cut surface is cut directly so as to form a direct joining portion Bb as necessary, or a corner is formed so as to form a direct joining portion Bb with the corner joining portion Bc. Must be cut. At this time,
It is also necessary to consider the effect of the bridge slack Bd on the bending of the band blade B.

Various devices for bending and cutting a band blade have been proposed, but the present applicant has disclosed a method for bending a band blade to solve the problem of the conventional bending in Japanese Patent Publication No. 6-0615883. is suggesting. 12A is a main part configuration diagram of an example of a device for performing the method of bending the band blade, and FIG. 12B is an explanatory diagram of a method of bending by the device.

In this apparatus, a band blade B is
Band blade B protruding from the front end 121 of the bending slit 120a of the bending die 120 while intermittently feeding forward with the
In addition, a push is made by a bending pusher 122 which rotates around a bending die 120 around a bending die 120 to bend the band blade B around a bending origin D shown in the drawing. In particular, as shown in FIG. 12 (b), this method does not perform bending of the band blade B at a target radius r and an angle G by one bending, but by repeating a small angle g and a feed p. Was achieved.

Therefore, if this method is used, a fixed set of bending dies and bending presses can be used without using a bending jig or the like which is conventionally prepared for each bending radius or angle. Although there is a limitation, it is possible to bend a wide range of radius and angle, and the feed p is a feed roller 123, and the bending angle g can be freely controlled by the rotation angle of the bending pusher 122. Was also suitable and had a high industrial effect. Further, according to this method, the protruding direction due to the rotation of the bending pusher 122 can be clockwise as well as counterclockwise as shown. However, this method was limited to bending the band blade.

An apparatus for bending a band blade, which is a further improved apparatus using this method, is disclosed in US Pat. No. 5,550,716.
No. 8 proposes. 13 (a) and 13 (b) are cross-sectional views showing a state immediately before bending, and FIG. 13 (b) is a cross-sectional view showing a state during bending. FIG.

In this apparatus, a band blade passing through a bending slit 211 provided in a fixed shaft 201 corresponding to the bending die shown in FIG. 12 is intermittently fed by a pair of feed rolls 292 and 293, and the fixed shaft is intermittently fed. Bending edges 221 and 22 provided to face the processing cylinder 202 externally fitted to 201
1 and the tip 21 of the bending slit 211.
By the interaction with 1a and 211b, it is bent about the bending origin D. This bending direction can be either the counterclockwise X direction shown or the clockwise direction opposite thereto. Note that 222 is provided on the entrance side of the processing cylinder 202, and even when the processing cylinder 202 is rotated for bending the band blade B, the processing cylinder 202 is fed to the band blade B fed into the bending slit 211. Is a relief window provided to prevent contact.

This apparatus uses repeated bending as in the apparatus shown in FIG. 12, but it is clear that the bending direction can be both clockwise and counterclockwise as compared with the apparatus shown in FIG. In addition, the device is also a fixed shaft 201 and a processing cylinder 202 that rotates around the fixed shaft 201, and has become more compact, the device as a whole has been reduced in size, and has a greater industrial effect. , But only related to the bending of the band blade.

The present applicant proposes not only the above-described band blade bending apparatus but also a band blade cutting apparatus which solves the conventional cutting problem in Japanese Utility Model Laid-Open No. 6-080516. FIG. 14A is a longitudinal sectional view of a main part of a device for cutting the band blade, and FIG. 14B is a transverse sectional view of a main part of the device.

This apparatus includes a processing outer cylinder 308 fixed on a substrate 302 and a processing inner cylinder 306 rotatably accommodated in an inner peripheral portion 303 of the processing outer cylinder 308.
And the processing inner cylinder 306 are provided with cutting slits 309 and 307 penetrating them. Further, both the processing outer cylinder 308 and the processing inner cylinder 306 are provided with a square cutting gradient portion 303a in the direction of decreasing the inner diameter with the same gradient,
The upper portions of the cutting slits 309 and 307 reach the slope portion 303a. The processing inner cylinder 306 is
Is connected to a rotating shaft 305 protruding to the opposite side of the processing outer cylinder 308 by the rotating shaft 305.

Therefore, according to this apparatus, the band blade B is inserted into the cutting slits 309 and 307 with the cutting slits 309 and 307 aligned with each other, and the blade portion Ba of the band blade B is inserted.
However, if the processing inner cylinder 306 is rotated at a position away from the upper portions of the cutting slits 309 and 307, direct cutting can be performed. As shown in the figure, the blade Ba of the band blade B
When the inner processing cylinder 306 was rotated in a state in which it was in contact with the upper portions of the components 9 and 307, square cutting could be performed. In the figure,
C is the cutting origin.

This device does not cut by a combination of cutting blades that slide in the linear direction as in the prior art, but cuts by compact rotation. Suitable for cutting the edge of the band blade after bending, and it can perform direct cutting and square cutting with one unit, and it has great industrial effect, but only cutting is considered It was done.

On the other hand, the band blade processing apparatus proposed in Japanese Patent Publication No. 7-036934 aims to improve the bending accuracy by feeding back, as a database, measured data obtained by bending the band blade under various conditions. However, as the basis of the bending, the above-mentioned repetitive bending proposed in FIG. 12 is used. Also, as for the feedback, the bending angle data with respect to the pressing amount of the bending die and the bending angle with respect to the feed amount of the band blade. Only data is used, and as before, the variation in bending after processing cannot be completely eliminated.

Further, this processing apparatus includes not only bending but also cutting, and feedback is also applied to this cutting. However, cutting is performed in advance before bending, and bending and cutting are performed as processes. It was done separately.

The bending method of a band blade proposed in Japanese Patent Publication No. Hei 7-090276 uses the same shaft and cylinder as the apparatus shown in FIG. 13. Similarly, the apparatus is made more compact and can be used in both directions. Although bending was achieved, it was only related to bending.

Further, there has been proposed a device in which a cutting device is incorporated in a band blade bending device so that the band blade can be bent and cut with a single device. And the origin of the cutting is different, and to cut after bending,
It was necessary to change the feed of the band blade and change the setup.

[0022]

SUMMARY OF THE INVENTION The present invention overcomes such a situation. Bending and cutting of a band blade can be performed at the same origin and collectively, and the accuracy of bending and cutting can be improved. It is still another object of the present invention to provide a method and an apparatus for bending and cutting a band blade capable of performing straight cutting and square cutting of a front end and a rear end.

[0023]

A method for bending and cutting a band blade according to claim 1 is a method for bending and cutting a band blade used in a punching die for punching a sheet material such as paper, corrugated cardboard, and plastic film. A feeding means capable of feeding the band blade back and forth, a cutting slit and a bending slit are provided in the axial direction, and the band blade forms the cutting slit during the cutting process, and the band blade is bent during the bending process. A fixed shaft that slides up and down so as to pass through the slit, is rotatably fitted to the fixed shaft, and slides up and down simultaneously with the fixed shaft,
A processing cylinder provided with a processing window on the exit side and a relief window on the entrance side provided corresponding to the cutting slit and the bending slit of the fixed shaft, and is externally fitted to the processing cylinder so as to be rotatable and vertically slidable, A cutting outer cylinder provided with a front cutting weir and a rear cutting weir corresponding to the processing window and the relief window of the processing cylinder, and the processing window of the processing cylinder is provided corresponding to the cutting slit of the fixed shaft. The band blade passing through the cutting slit is subjected to a shearing force from the left and right by the rotation of the processing cylinder to directly cut the band blade so that the inner cutting edge faces the inner blade, and the band blade is square-cut on the inner peripheral side. The cutting portion provided on the outer peripheral side with the outer angle cutting edge and the outer straight cutting edge to be cut directly facing each other, and the band blade provided corresponding to the bending slit of the fixed shaft and sent out from this bending slit. , The bending pressure is applied from the left and right A bending edge provided with a bending edge for bending is connected to the front cutting weir of the cutting outer cylinder, and an external angle cutting edge provided on the outer peripheral side of the cutting window of the processing cylinder and an external direct cut. A square cutting weir end and a straight cutting weir end that are cut against the edge are provided on both sides, and when cutting the band blade, the front cutting weir is at a cutting position that can cooperate with the cutting part of the processing cylinder. Rotating slide to hold the position, otherwise hold the retracted position, and while feeding the band blade forward, cut the slit of the fixed shaft so that the band blade has a desired punched shape as a whole. The cutting end of the band blade is cut as necessary by the cooperation of the cutting section of the processing cylinder and the front cutting weir of the cutting outer cylinder, and then the bending of the fixed shaft and the bending section of the processing cylinder. The band blade whose front end has been cut by motion is bent, and then the fixed shaft is cut. By cutting the rear end of the bent band blade in cooperation with the lit, the cutting section of the processing cylinder, and the front cutting weir of the cutting outer cylinder, the front end of the band blade to be processed next is simultaneously cut at the same time. It can be cut.

According to this method, first, a cutting slit and a cutting portion, and a bending slit and a bending portion for bending are provided at the same position above and below a fixed shaft and a processing cylinder rotatably fitted to the fixed shaft. It is characterized in that the fixed shaft and the processing cylinder are moved up and down as a set, the band blade is cut by the cutting slit and the cutting section, and the band blade is bent by the bending slit and the bending section.

That is, the band blade can be cut and bent with only one set of the fixed shaft and the processing cylinder. In addition, since the cutting slit and the bending slit provided above and below the same fixed axis are used, the cutting origin and the bending origin, which are the tips of the respective slits, are in principle vertically at the same position, that is, the band edge of the band blade to be machined. As the processing position, the cutting origin and the bending origin are the same. Therefore, in principle, when bending after cutting and cutting after bending, it is not necessary to move the band blade back and forth in order to match the origin of the band blade. Further, since the cutting means and the bending means are provided by the same set of the fixed shaft and the processing cylinder, the apparatus becomes very compact.

In this method, an inner cutting edge for cutting a band blade in cooperation with a cutting slit of a fixed shaft is provided on an inner peripheral side of a cutting portion of a processing window opened in a processing cylinder, and an outer peripheral side is formed. The outer cutting edge that cuts the band blade squarely and the outer cutting edge that cuts directly are provided facing each other, and the outer cutting edge and the outer cutting edge of the outer periphery cooperate with the cutting edge to cut the band blade. Equipped with a cutting outer cylinder provided with a front cutting weir provided with a square cutting weir end for cutting or direct cutting and a straight cutting weir end on both sides, only when cutting the band blade, slide this front cutting weir to the cutting position, It is made to rotate.

That is, while the band blade is supported by the cutting slit of the fixed shaft and the corner cutting weir end of the cutting outer cylinder, the cutting section on the side having the outer corner cutting edge and the inner cutting edge of the processing cylinder is removed. By hitting the band blade by the rotation of the processing cylinder, the front end of the band blade can be directly cut on the inner peripheral side and the rear end of the band blade can be square-cut on the outer peripheral side by shear cutting. In this way, the corner cutting of the rear end of the band blade and the direct cutting of the band blade to be processed next can be simultaneously performed.

In a state where the band blade is supported by the cutting slit of the fixed shaft and the straight cutting weir end of the cutting outer cylinder, the cutting section on the side having the right-angle cutting edge and the inner cutting edge of the processing cylinder is formed. , By hitting the band blade by turning the processing cylinder,
At the same time, it is possible to directly cut the front end of the band blade on the inner peripheral side and directly cut the rear end of the band blade on the outer peripheral side. Thus, the straight cutting of the rear end of the band blade and the direct cutting of the band blade to be processed next can be performed simultaneously.

[0029] In this method, the rear cutting weir of the cutting outer cylinder is used to balance the entire cutting outer cylinder and to prevent the cutting outer cylinder from rotating smoothly with respect to the processing cylinder. It is provided at a position facing the cutting weir.

According to a second aspect of the present invention, there is provided a method for bending and cutting a band blade according to the first aspect, wherein the relief window of the processing cylinder further includes a rear corner cutting edge corresponding to an outer edge of the processing window. The cutting edge of the cutting outer cylinder is provided with a rear corner cutting weir end which is used to cut the rear corner cutting edge of the relief window of the processing cylinder. In the case where the cutting outer cylinder is required, the rear corner cutting weir end of the cutting outer cylinder is rotated and slid to a cutting position capable of cooperating with the rear corner cutting edge of the processing cylinder, and is held in position. After retreating the band blade to a position where the front end comes out of the cutting slit of the fixed shaft, the processing cylinder is rotated, and then the front end of the band blade is cut by the corner cutting edge.

In this method, a cutting edge of a rear corner is provided on the outer peripheral side of the escape window of the processing cylinder, and the cutting outer cylinder is provided in cooperation with the cutting edge of the rear corner. A cutting weir is provided after the corner cutting weir end for cutting the band blade, and after the cutting of the rear end of the band blade and the direct cutting of the front end of the band blade to be processed next in claim 1, If the front end of the band blade to be machined requires square cutting, retract the band blade to the position where it comes out of the cutting slit, and hold the band blade at the rear corner cutting weir end of the cutting outer cylinder. The front edge of the band blade is angularly cut by shearing by rotating the rear edge of the band blade to hit the edge of the band blade.

Thus, according to this method, not only the bending and cutting of the band blade can be performed at one time, but also a band blade that requires so-called square cutting at both the front end and the rear end can be processed. , With great industrial effects.

According to a third aspect of the present invention, there is provided a method of bending and cutting a band blade according to any one of the first and second aspects, wherein when the band blade is bent at the bending section of the processing cylinder, the bending section is formed. The time effect of the bending edge of the bending edge applying the bending pressure to the band edge and / or the hysteresis effect when the bending edge of the bent portion repeatedly applies the bending pressure to the band edge. Features.

In this method, first, regarding bending of the band blade, first,
It is characterized by considering the time effect. That is, the time during which the bending edge applies the bending pressure to the band blade is adopted as the bending processing data. According to the knowledge and understanding of the present applicant, during bending, there is a certain relationship between the time during which the bending pressure is applied and the springback of the band blade when the bending pressure is released, that is, in principle, It was speculated that there was a relationship that the springback was smaller when the bending pressure was applied for a longer time. Therefore, this time effect, which has not been considered in the past, has been considered.

This method is also applicable to the bending of the band blade.
It is characterized by considering the history effect. In other words, generally, when a material is stressed and released, it returns to its original shape at the elastic limit, but when it exceeds the elastic limit, it undergoes plastic deformation and does not return to its original shape. The term “bending” used herein is based on this plastic deformation. In addition, residual stress may remain. Therefore, when a small bending is repeated to obtain a bending with a desired radius of curvature and bending angle, the hysteresis effects such as plastic deformation and residual stress of the previously bent portion are taken into consideration. Conventionally, such a history effect
Although it was not considered at all and caused variations in bending accuracy, the bending accuracy was further improved by taking this into account.

The time effect and the hysteresis effect are also important factors as parameters when so-called feedback is used. With this, the feedback works more effectively and the bending accuracy can be improved. .

The above-mentioned time effect and hysteresis effect may be considered either alone or both.

The apparatus for bending and cutting a band blade according to the fourth aspect is an apparatus for realizing the method according to the first aspect, and has the same effect.

An apparatus for bending and cutting a band blade according to a fifth aspect is an apparatus for realizing the method according to the second aspect, and performs the same processing.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method and an apparatus for bending and cutting a band blade according to the present invention will be described with reference to the accompanying drawings.

FIGS. 1A and 1B conceptually illustrate a method of bending and cutting by an example of a band blade bending and cutting apparatus according to the present invention. FIG. 1A shows a front end cutting, FIG. () Is a cross-sectional view of a main part in a process of cutting a rear end and (d) is a process of cutting a front end corner.

These figures are cross-sectional views of a state in which the band blade is machined in a portion directly related to the bending and cutting of the band blade bending and cutting apparatus of the present invention, which is cross-cut just above the band blade. In each lower part, the band blade in the machined state is conceptually shown together with the part viewed from the near side.

This part comprises a fixed shaft 1, a processing cylinder 2 rotatably fitted to the fixed shaft 1, and a cutting outer cylinder 5 fitted to the processing cylinder 2 so as to be rotatable and vertically slidable. The processing cylinder 2 has a cutting window 3 and a bending section 3b on the outlet side (left side of the drawing) of the band blade B (left side in the figure). A relief window 4 is provided on the entrance side of the blade B.

The fixed shaft 1 is vertically provided with a cutting slit 1a and a bending slit 1b, and the fixed shaft 1 and the processing cylinder 2 are fixed so as to move up and down simultaneously. The cutting portion 3a of the processing window 3 corresponds to 1a, and the bending portion 3b corresponds to the bending slit 1b. By moving the fixed shaft 1 and the processing cylinder 2 up and down simultaneously,
The cutting slit 1a and the cutting portion 3a cut the band blade B sent back and forth at a predetermined position, and the bending slit 1b
And a bending portion 3b.

As can be seen from the cross-sectional shape of the processing cylinder 2, a processing window 3 on the exit side for passing the band blade B through the cylindrical portion and a relief window 4 on the entrance side are opened. 3 at a position corresponding to the cutting slit 1a on the inner wall,
The inner cutting edge 3aa is formed facing the inner peripheral side, and the outer corner cutting edge 3ab and the outer cutting edge 3ac are formed facing the outer peripheral side. The inner cutting edge 3aa on the inner peripheral side
Is for direct cutting. Inner cutting edge 3aa and outer straight cutting edge 3
ac is formed by opening a processing window 3 in the radial direction with respect to the outer circumference and the inner circumference of the processing cylinder 2 finished in a straight line in the axial direction. A portion corresponding to the corner joint Bc of the band blade B (see FIG. 8) is formed in the portion, and the processing window 3 is similarly opened to form the portion.

The outer corner cutting edge 3ab formed on the outer periphery
Is maintained as it is up to the inner wall constituting the escape window 4 on the opposite side, and the rear wall cut edge 4a is formed on this inner wall. That is, the rear corner cutting edge 4a is also subjected to the same shape processing as the outer corner cutting edge 3ab on the outer periphery of the processing cylinder 2 continuously from the outer corner cutting edge 3ab forming portion, and then the relief window 4 is opened in the radial direction. It is formed by doing.

The cutting outer cylinder 5 has a front cutting weir 5a and a rear cutting weir 5b which are rotatably and vertically slidably fitted to the processing cylinder 2 and are formed so as to be in contact with the outer periphery of the processing cylinder 2. The front cutting weir 5a corresponds to the processing window 3 of the processing cylinder 2,
The rear cutting weirs 5b correspond to the escape windows 4 and face each other. On the inner peripheral side of both ends of the front cutting weir 5a, the outer corner cutting edge 3ab of the cutting portion 3a of the processing cylinder 2,
A corner cutting weir end 5aa and a straight cutting weir end 5ab are formed in a similar manner so as to be able to perform square cutting and direct cutting by shearing in cooperation with the outer and direct cutting edge 3ac. A rear corner cutting weir end 5ba is formed on the inner peripheral side of the rear cutting weir 5b so as to cooperate with the rear corner cutting edge 4a of the escape window 4 of the processing cylinder 2 so as to be able to cut the corner by shearing. Have been.

When bending the band blade B, the cutting outer cylinder 5 is slid up and down and retracted to a position where it does not appear in the cross-sectional view as shown in FIG. It does not hinder the bending process. On the other hand, when cutting the band blade B, FIG.
As can be seen in (c) and (d), the cutting part 3 of the processing cylinder 2
slide up and down to a position where it can cooperate with a,
The position is maintained.

Further, in the drawing showing the band blade B in the machined state shown together, the cut-off portion Be cut off by cutting is hatched, and the other portions are the same as those described in FIG. Therefore, the same reference numerals are given and duplicate explanations are omitted.

FIG. 1 (a) shows a process for cutting the front end of the band blade B for the first time from the continuous band blade B. The band blade B passes through the cutting slit 1a of the fixed shaft 1. And the tip of the band blade B is set to the cutting slit 1a.
From the inner circumference of the cutting outer cylinder 5. The front cutting weir 5a of the cutting outer cylinder 5 is
The end position of the ab is held at a rotational position such that the end surface abuts against the side surface of the band blade B, that is, the cutting position.
When the tip of the band blade B protrudes to ab, the band blade can be directly cut at this portion as well. However, in this case, since the cutting outer cylinder 5 does not need to directly participate in the cutting, it may be completely retracted by sliding up and down.

In this state, when only the processing cylinder 2 is rotated counterclockwise by a predetermined angle as indicated by the arrow in the figure, the shearing action of the inner cutting edge 3aa of the processing cylinder 2 and the cutting slit 1a causes The band blade B is directly cut, and the cut-off portion Be falls freely. At this time, as will be described later, a gradient is formed in the outer diameter of the portion of the fixed shaft 1 where the cutting slit 1a is provided, and a corresponding gradient is also formed on the inner peripheral side of the inner cutting edge 3aa of the processing cylinder 2. As shown in FIG.
The direct joining portion Bb required for the linear connecting portion described in (1) is formed.

The cutting origin C, which is the origin of the cutting, is the position of the band blade B corresponding to the tip of the cutting slit 1a of the fixed shaft 1 as shown.

FIG. 1 (b) shows a bending step performed after cutting the front end of the band blade. In this case, after the end of the cutting, the fixed shaft 1 and the processing cylinder 2 slide vertically with respect to the band blade B to a position where the bending slit 1a of the fixed shaft 1 and the bending portion 3b of the processing cylinder 2 can be bent. The cutting outer cylinder 5 is set at a position that does not appear in this sectional view.
That is, the band blade B is slid up and down to a position where it does not hinder the band blade B intermittently fed for bending.

In this state, only the processing cylinder 2 rotates by a predetermined angle with respect to the fixed shaft 1, so that the bending edge 3 ba of the bent portion 3 b is intermittently and sequentially interposed from the bending slit 1 b of the fixed shaft 1. The bending pressure is repeatedly applied to the side face of the band blade B sent out, and the feeding amount of the band blade B and the bending edge 3ba
By controlling the rotation angle of the radiator according to a predetermined program, it is possible to achieve a desired curvature radius and a desired bending angle.

The bent edge 3ba of the bent portion 3b
Are provided so as to face each other with the bending slit 1b as a center, so that the band blade B can be rotated clockwise or counterclockwise as viewed from the top of the figure as indicated by the arrow in the figure. Can be subjected to bending pressure. As a result, as shown in the drawing, the bending result allows the bidirectional bending to be continuously performed on the band blade B.

Here, as can be seen from the drawing, the bending origin D, which is the origin of this bending, is the tip of the bending slit 1b of the fixed shaft 1, and this position is, when viewed from the band blade B, the cutting origin. It is in the same position as C. Thus, in the bending and cutting method using the fixed shaft 1 and the processing cylinder 2,
The cutting origin and the bending origin are the same, and when bending or the like after cutting, it is not necessary to feed the band blade B back and forth in order to match the cutting origin and the bending origin of the band blade B.

Here, the fact that the cutting origin and the bending origin are the same is not exactly the same because there is a gap due to the gradient of the cutting surface of the cutting slit, clearance, and the like. Means that it can be determined that they are the same under the continuous machining control. That is, the above-mentioned gap is recognized on the parameter and the program, and the band blade B is recognized.
Can be adjusted by the feed amount.

FIG. 1C shows a step of cutting the rear end of the bent band blade. In this case, after the end of the bending, the band blade B
The fixed shaft 1 is located at a position where the cutting slit 1a of the fixed shaft 1 and the cutting portion 3a of the processing cylinder 2 can be cut.
And the processing cylinder 2 are set by sliding up and down, and the cutting outer cylinder 5 is set.
Slides up and down to a position where the front cutting weir 5a can cooperate with the cutting portion 3a of the processing cylinder 2;
The edge of the corner cutting weir end 5aa of the front cutting weir 5a is rotated to a position where it comes into contact with the side surface of the band blade B, and the cutting position is maintained. On the other hand, the inner cutting edge 3aa and the outer corner cutting edge 3ab of the cutting portion 3a of the processing cylinder 2 are located at positions facing the corner cutting dam end 5aa of the front cutting dam 5a with the band blade B interposed therebetween. It is set to become.

In this state, with the cutting outer cylinder 5 holding this cutting position, only the processing cylinder 2 rotates clockwise (in the direction of the arrow in the figure), and the cutting outer cylinder 5 is in contact with the square cutting weir end 5aa of the front cutting weir 5a. For the band blade B supported by the cutting slit 1a of the fixed shaft 1,
Inner cutting edge 3aa and outer corner cutting edge 3a of cutting portion 3a
When b strikes, the band blade B is simultaneously sheared to make a corner cut at the rear end and a straight cut at the front end. At this time, the rear end of the band blade B is cut in a state where the corner cutting weir end 5aa of the front cutting weir 5a hits, so that the rear end of the band blade B is not bent or twisted by cutting. .

At this time, the inner cutting edge 3aa of the processing cylinder 2 and the cutting slit 1a of the fixed shaft 1 described with reference to FIG.
The same gradient in the opposite direction as the gradient in the axial direction provided on the cutting surface is provided also on the cutting surfaces of the corner cutting weir end 5aa of the cutting outer cylinder 5 and the outer corner cutting edge 3ab of the processing cylinder 2. , FIG.
As shown in the view of the band blade B in (c) viewed from the side, the joint portion Bb is also formed directly on the rear end face of the cutting. Further, the corner joints Bc required for the orthogonal connecting portion described with reference to FIG. 11 are also formed by the shapes of the corners of the corner cutting weir end 5aa and the outer corner cutting edge 3ab.

Further, as can be seen from this figure, when the rear end is cut, the corner of the rear end of the bent band blade B is cut at the same time as the front end of the band blade B to be processed next. Direct cutting is also performed, and two cutting steps are performed simultaneously, so that processing time can be saved. The cut-off portion Be generated at the time of this cutting is inevitably generated by any conventional cutting device.

At the time of this rear end cutting, the straight portion of the band blade B is moved from the contact portion of the square cutting weir end 5aa of the front cutting weir 5a.
It is necessary to secure up to the cutting slit 1a portion of the fixed shaft 1, that is, up to the cutting origin C, but usually, the division of the band blade is set so that a constant linear portion is secured continuously to the bending portion. So there is no problem.

However, if it is unavoidable to provide a divided portion in the curved portion in relation to the shape of the band blade to be completed, after bending, the above-mentioned fixed straight portion is added as a discarded straight portion. Truncated and then by another device
A method of cutting off the discarded straight portion is adopted. This problem cannot be solved by any of the conventional bending or cutting apparatuses, in addition to the bending and cutting apparatus of the present invention.

In the case where direct cutting is required as the rear end cutting, the cutting outer cylinder 5 may be set at a position as shown in FIG. In this case, the rear end and the front end can be cut simultaneously.

As described with reference to FIG. 11, the cut shapes of the front end and the rear end of the divided band blade may be the case where only the joint Bb is provided directly, or the case where the corner joint Bc is further provided. Therefore, the combination of the cutting shape of the front end and the rear end is straight-straight,
There are four types of right-angle, right-angle, right-angle. Of these,
With respect to the right-angle, the right-angle can be dealt with by cutting the front end straight, converting the bending program data and performing the bending, and exchanging the front and rear of the split band blade cut at the rear end.
As described above, the straight-to-straight processing is performed in FIG.
After setting the cutting position of the cutting outer cylinder 5,
What is necessary is just to rotate and hold the position for direct cutting, and to set the turning direction of the processing cylinder 2 for direct cutting.

Most of the actual split band blades are required to be straight-to-straight, straight-to-square, and square-to-straight. Therefore, after the first tip machining, the band is intermittently fed forward. While
This can be handled by repeating the cycle of simultaneous cutting and bending of the rear end and the front end. However, exceptionally, in the case of corner-corner, a step of cutting the front end corner of the band blade to be processed next is required as shown in FIG.

In this case, after the rear end of the band blade B is cut in FIG. 1C and the front end of the band blade B to be processed next is directly cut, the band blade B is cut into the cutting slit 1a of the fixed shaft 1. The cutting outer cylinder 5 is set back to the cutting position where the end face of the rear corner cutting weir end 5ba provided on the rear cutting weir 5b of the cutting outer cylinder 5 comes into contact with the band blade B. Then, only the processing cylinder 2 is rotated counterclockwise (in the direction of the arrow in the drawing), and the rear corner cutting edge 4a provided in the escape window 4 of the processing cylinder 2 is brought into contact with the band blade B. The front end of the band blade B is square-cut by shear cutting.

Also in this case, the cut surface is directly
b and the corner joint Bc are generated. Further, at this time, since the cut-off portion Be generated is sheared and cut in a so-called cantilever state, bending and torsion due to cutting may occur. However, since this portion is a portion to be cut off, there is a problem. No. FIGS. 2A and 2B conceptually illustrate an apparatus state of the rear end cutting by the apparatus for bending and cutting the band blade shown in FIG. 1. FIG. 2A is a longitudinal sectional view of a main part thereof, and FIG. 3A and 3B conceptually illustrate an apparatus state of bending by the apparatus for bending and cutting the band blade of FIG. 1, wherein FIG. 3A is a longitudinal sectional view of a main part thereof, and FIG. It is X2 sectional drawing in a).

FIGS. 2 and 3 show a vertical sliding mode in accordance with the cutting and bending of the band blade B of the fixed shaft 1, the processing cylinder 2 and the cutting outer cylinder 5 in FIG.
Therefore, the same reference numerals are given to the parts already described, and the overlapping description will be omitted.

2 and 3, reference numeral 6a denotes a restraining ring. When the cutting outer cylinder 5 cuts the band blade in cooperation with the fixed shaft 1 and the processing cylinder 2, the cutting ring 5a The outer diameters of the ends of the front cutting weir 5a and the rear cutting weir 5b, which are erected in a two-legged state, are restricted to reduce the escape by cutting. Reference numeral 6b denotes a base for fixing the base of the processing cylinder 2 and installing a restraining ring 6a, and a base for rotatably supporting the fixed shaft 1, and 6c for rotating the processing cylinder 2 with respect to the fixed shaft 1. This is a rotating means constituted by a servomotor or the like. The restraining ring 6a, the base 6b, and the rotating means 6c are collectively referred to as a processing base 6.

The fixed shaft 1, the processing cylinder 2, and the processing base 6 are vertically slid by vertical slide means (not shown).
The processing cylinder 2 is held up and down, and the processing cylinder 2 is rotated by the rotation means 6 with respect to the fixed shaft 1. The cutting outer cylinder 5 is provided with a good sliding means and a rotating means (not shown) at the upper end thereof, and slides up and down with respect to the fixed shaft 1 to rotate and move between the retracted position and the cutting position. Position can be held.

In FIGS. 2 and 3, the vertical position of the band blade B shown by the two-dot chain line is not changed. At the predetermined fixed vertical position, the fixed shaft 1 and the processing cylinder 2 are connected to the band blade B which is intermittently fed back and forth during cutting, as shown in FIG.
(A) is moved to the up and down position, and the position is held;
The band blade B passes through the cutting slit 1 a of the fixed shaft 1 and the cutting portion 3 a of the processing cylinder 2. In addition, the cutting outer cylinder 5
Also, the corner cutting weir end 5aa and the like of the front cutting weir 5a are at the upper and lower positions capable of cooperating with the outer corner cutting edge 3ab and the like of the cutting portion 3a. This state is cut at the upper end of the band blade B,
The X1 cross section viewed from above is shown in FIG. 2 (b).

FIG. 2B corresponds to FIG. 1C, but also in FIGS. 1A and 1D, the rotational position of the cutting outer cylinder 5 with respect to the fixed shaft 1 is changed. The only difference is the vertical position of each.

At the time of bending, the fixed shaft 1 and the processing cylinder 2
Moves to the vertical position in FIG. 3A and is held in position. At this time, the band blade B passes through the bending slit 1 b of the fixed shaft 1 and the bending portion 3 b of the processing cylinder 2. On the other hand, the cutting outer cylinder 5 slides upward while its upper end is externally fitted to the fixed shaft 1 and maintains concentricity with the fixed shaft 1, and stands by without interfering with bending of the band blade B. Holds position.

In this way, the fixed shaft 1 and the processing cylinder 2 provided with the cutting means and the bending means at the same vertical position are simultaneously moved up and down with respect to the band blade B, and only these two parts are used. The band blade B can be bent and cut. Also, at this time, the cutting origin C and the bending origin D, which are the tips of the cutting slit 1b and the bending slit 1b provided on the fixed shaft 1, are the same origin position for the band blade B. The bending process can be performed without any adjustment.

The vertical movement of the fixed shaft 1 and the processing cylinder 2 is
As described herein, the cutting slits 1a and 3b, and the bending slit 1b and the bending section 3b can be formed on the band blade B so that they can be processed with respect to the band blade B at the time of processing. I just need. Here, the vertical position of the band blade B on the processing side is fixed, and the fixed shaft 1 on the processing side is moved up and down in accordance with the processing mode. May be moved up and down, and the fixed shaft 1 on the processing side may be vertically fixed.

FIG. 4 shows a fixed shaft of the apparatus shown in FIG. 1, wherein (a) is a front view, (b) is a cross-sectional view of a cutting slit, and (c) is a cross-sectional view of a bending slit.

In the fixed shaft 1, reference numerals 1c and 1d are provided at both ends of the fixed shaft 1, and flat portions serving as presses for restricting the rotation of the fixed shaft 1; The opening is provided in the band and facilitates the entry of the band blade.

D0 is the basic outer diameter of the fixed shaft 1,
The upper end of the cutting slit 1a also has this outer diameter D0. D1 is the outer diameter of the lower end of the cutting slit 1a,
Joint B directly on the cut surface of the cut band blade with respect to the outer diameter D0
b to be smaller.

Outer diameter D2 of portion provided with bending slit 1b
Is smaller than the outer diameter D1 and takes into account the blade thickness BT of the band blade B to be bent here. The difference between the basic outer diameter D0 of the fixed shaft 1 and this outer diameter D2,
(D2-D0) / 2 is the inner diameter of the bent edge 3ba of the processing cylinder 2 and the cutting origin C of the tip of the cutting slit 1a of the fixed shaft 1.
And directly related to the so-called bending gap T,
This is a very important factor when bending.

The outer diameter D3 is smaller than the basic outer diameter D0 of the fixed shaft 1.

S1 is a gap between the cutting slits 1a, which is slightly larger than the blade thickness BT of the band blade B, so that the band blade B does not hinder the passage, and the band blade B is used for cutting. Is determined to the extent that there is no problem. S2 is a gap between the bending slits 1b, which is slightly larger than the gap S1. This is because, in the case of bending, this gap S2
This is because the influence of backlash due to is smaller.

As specific values, the band blade B to be machined is
When the blade thickness BT is 0.7 mm, D0 = 20 mm, D
1 = 19 mm, D2 = 17.4, D3 = 19 mm, S1
= 0.78 and S2 = 0.8 are suitable, but D3 is determined by a balance between downsizing of the device and strength of the shaft, and D1 and D2 are band blades B to be machined against them. And S1 and S2 are determined by the blade thickness BT of the band blade B, and are not limited to the specific dimensions described above.

Note that, based on the structure of the fixed shaft and the basic structure of the bending and cutting method of the present invention, the cutting slit and the bending slit are further connected in the vertical direction so as to be applicable to band blades having a plurality of thicknesses. It can also be set up. Specifically, the blade thickness BT of the band blade B is 0.4, 0.7, 1.
Although there are types such as 0, 1.2, etc., in order to correspond to any combination of these, a cutting slit and a bending slit are provided, respectively, in ascending order from the top,
It is possible to use a single fixed shaft to cope with band blades having a plurality of thicknesses. In this case, a cutting section, a bending section, and the like may be provided correspondingly to the processing cylinder and the cutting outer cylinder.

FIGS. 5A and 5B show a processing cylinder of the apparatus shown in FIG. 1, wherein FIG. 5A is a front view, FIG.
(C) is a cross-sectional view of the bent portion. In FIG. 5, the cross-sectional view of FIG. 5B is a cross-sectional view taken along line X3 of the front view of FIG. 5A, and further includes a cross-sectional view of X5 and a view taken along arrow X6. The cross-sectional view of ()) is an X4 cross-section of the front view of (a). 5 (b) and 5 (c), the processing window 3 and the escape window 4 are formed in the processing cylinder 2 and the remaining portions are formed by a left fan 2a and a right fan 2 for convenience.
The symbol “b” is attached.

In FIG. 5B, a relief window 4 is provided at a position facing the cutting portion 3a and the bending portion 3b of the processing window 3, and this relief window is used when the band blade B is cut or bent. The cutting slit 1a of the fixed shaft 1 and the bending slit 1
The band blade B sent to the b is released, that is, does not come into contact with the band blade B. That is, the cutting portion 3a
The central angle α2 of the escape window 4 is larger than the central angle α1 of the bending window 3b and the central angle α3 of the bent portion 3b. The center angle α3 of the bent portion 3b is smaller than the center angle α1 of the cut portion 3a because the bent edge 3b
This is because a needs to be rotated by a larger angle with respect to the bending origin D than when cutting.

Further, the right fan portion 2b shown in the X5 sectional view
3d corresponds to the gradient of the outer diameter of the cutting slit 1b of the fixed shaft 1 and directly forms the joint Bb when the band blade B is directly cut in cooperation. The corner cutting part 3ae and the slope part 3af are formed at the corner cutting weir end 5a of the front cutting weir 5a of the cutting outer cylinder 5.
The square cut part 5ad and the straight cut part 5ae of the cut surface of a (see FIG. 6)
When the band blade B is cut in a corner in cooperation, a square joint Bc and a direct joint Bb are formed.

3 ah per square cut appearing in the X6 arrow view
Is provided in order to cut more finely in accordance with the gradient of the blade portion Ba when the blade portion B comes into contact with the blade portion Ba from the side surface and performs shear cutting. The gradient per cutting 3ag is provided so as to abut against the band blade B in order from the top of this portion and to shear the band blade B in order from the top.

FIGS. 6A and 6B show a cut outer cylinder of the apparatus shown in FIG. 1, wherein FIG. 6A is a sectional view taken along line X7 of FIG.

In this figure, the front cutting weir 5a and the rear cutting weir 5b are provided so as to face each other, and the central angle β1 of the front cutting weir 5a is defined by the square cutting weir end 5aa and the straight cutting weir end 5ab on both end surfaces. For the purpose of turning and holding the band blade to make a square cut and a straight cut, the entire circumference is reduced by 90 degrees, which is a quarter, by the blade thickness BT of the band blade B. On the other hand, The central angle β2 of the rear cutting weir 5b is set to a slightly smaller angle so as not to hinder the band blade B when the front cutting weir 5a is at the cutting position.

The square cut-out portions 5ac and 5bb provided to form the corner cut weir end 5aa and the rear corner cut weir end 5ba
Only the predetermined angles γ1 and γ2 are formed. This is because the square fillet portions 5ac and 5bb obstruct the right fan portion 2b provided with the outer cutting edge 3ac of the processing cylinder 3 which rotates on the inner periphery thereof. Are limited in order to secure the rotation range of the.

In the front view of FIG.
The square cut part 5ad and the inner diameter side slope part 5ae of the cut surface formed by ac correspond to the square cut part 3ae and the slope part 3af provided on the outer peripheral side of the processing cylinder 2, and cooperate with the band blade. B is cut into a square joint B
A joint Bb is formed directly with c.

FIG. 7 is an external perspective view showing the entire configuration of the apparatus for bending and cutting the band blade shown in FIG.

The apparatus 10 for cutting a band blade and a bend includes, in addition to the previously described fixed shaft 1, the processing cylinder 2 provided with the processing window 3 and the relief window 4, the cutting outer cylinder 5, and the processing base 6, various related components. Means 7 is provided with a feeding means 8 capable of feeding the band blade B intermittently back and forth while controlling the position.

Various related means 7 include a set of first guide rolls 7a for guiding the band blade immediately before the processing of the band blade B, and a bridge processing means 7b for applying a bridging process to the band blade B, that is, a bridging process Bd. , A band blade holding block 8e described later
, A second guide roll 7d which can feed the band blade back and forth independently of the feeding means 8 and has an origin sensor 7c for detecting the processing origin of the band blade B, and a band blade B And a straightening roll 7f for correcting the winding habit of the band blade B wound in a coil shape.

The band blade B to be bent and cut by the apparatus 10 is prepared in a fixed size of 1 m to 2 m.
As shown in the figure, there is a coil wound in a coil shape, but here, an example of the band blade B prepared in a coil shape is described.
In the case of a fixed size, the straightening roll 7f may not be required.

The feed means 8 includes a feed screw shaft 8a constituted by a ball screw, a feed motor 8b constituted by a servomotor capable of rotating and stopping the screw shaft 8a in a program controllable manner, and a guide for linear movement. A guide shaft 8c, which is guided by the guide shaft 8c, is screw-fitted to the feed screw shaft 8a, and is moved forward and backward by rotation of the screw shaft 8a; and the band blade feed block 8d. The band blade B is provided with a gripping means for gripping and releasing the band blade B, and is constituted by a band blade grip block 8e capable of intermittently feeding the band blade B back and forth.

While the band blade B is being fed back and forth using the feeding means 8, the second guide roll 7d is in the released state, and does not hinder its movement back and forth. On the other hand, when releasing the band blade grasping block 8e of the feeding means 8 and grasping and changing the band blade B,
The band blade B can be fed back and forth by the second guide roll 7d.

In this way, the band blade B in the coiled state is corrected, the processing origin is detected, bridge processing is performed, and the band shaft B is collectively bent by the fixed shaft 1, the processing tube 2, and the cutting outer tube 5. And cutting can be performed continuously.

FIG. 8 is an explanatory view showing the relationship between the pushing of the bending of the band blade and the press in the method of the present invention. In this figure, (a) shows a method of bending by pushing, (b) shows a method of bending by pushing and pressing, and (c) shows a method of bending mainly by pressing. The bending slits 1 of the fixed shaft 1 in that state are respectively shown.
A cross-sectional view of the portion b is shown on the left, a view of the band blade B after the bending is viewed from directly above the blade portion is shown on the upper right, and a side view of the band blade viewed from the bent mountain side is shown on the lower right.

In FIG. 8A, the bent edge 3ba is a band blade B.
And rotates slightly around the center of the fixed shaft 1 to return by applying bending pressure. At this time, the band blade B
A bending pressure is applied almost vertically to the surface. Such bending is called bending by pushing. At this time, as shown in the lower right diagram, a thin trace line Fa with which the bent edge 3ba is in contact remains on the mountain side of the bent band blade. This striking is used for bending in a case where bending with a large radius of curvature is realized by repeating a small striking angle and the accompanying feed many times, but the bending of the band blade B due to the rotation angle of the bending edge 3ba is performed. This is a bending method in which a ratio of a difference between a typical bending angle and an actual bending angle of the band blade B released from the bending edge 3ba is large.

That is, there is springback, which is an uncertain factor in bending accuracy, and a desired bending process cannot be obtained only by bending using an ordinary database. In order to reduce springback, which is an uncertain factor, and increase bending accuracy, the band blade B and the bending edge 3ba are required.
It is preferable to further use a database of the bending process in consideration of the contact time, that is, the time effect described later.

In FIG. 8B, the bent edge 3ba is a band blade B.
And returns to the center of the fixed shaft 1 by applying more bending pressure by rotating more than the above (a). On this occasion,
In the contact portion, as the band blade B is bent, a bending pressure perpendicular to the surface of the band blade B and a pressure in a direction parallel to the surface are applied.
The pressure in the parallel direction acts to press the band blade B sandwiched between the bending edge 3ba and the outer circumference of the bending slit 1b of the fixed shaft 1, so to speak. Called bending.

At this time, as shown in the lower right diagram, a slightly thick trace line Fb with which the bent edge 3ba abuts remains on the crest side of the bent band blade B. This thick trace line Fb is generated by the press pressure. This pushing bending is used when a bending angle of about 30 to 70 and a bending process with a relatively small radius of curvature are realized by bending several times and a feed amount smaller than the blade thickness BT. At this time, the first bending position of the bending edge 3ba with respect to the band blade B is
The next bending position is always at a perpendicular position, and is always a position bent at a predetermined bending angle between the bending edge 3ba and the outer periphery of the fixed shaft 1. Therefore, when performing bending processing of this shape, it is necessary to consider the hysteresis effect in addition to the time effect mentioned above.

In such a bending process, the bending pressure at the bending edge 3ba is dispersed into the pushing pressure and the pressing pressure and acts on the band blade B. It is also necessary to build a database that takes into account the learning function that corresponds to each time.

In FIG. 8C, the bent edge 3ba is a band blade B
And turns around the center of the fixed shaft 1 more than in (b) above to apply bending pressure and return. On this occasion,
At the contact portion, a pressing force in a direction parallel to the surface of the band blade B is applied as a main force, rather than a bending pressure perpendicular to the surface of the band blade B. Such bending is mainly called press bending.

At this time, on the crest side of the bent band blade, as shown in the lower right figure, a thick trace line F with which the bending edge 3ba is in contact.
c remains. The thick trace line Fc is generated by the slip caused by the press pressure. This press bending,
It is used when a bend with a small radius of curvature is realized by a single bend. According to this method, the bending effect is larger than that of FIG. 8B, and the bending process cannot be performed by the bending method of FIG. 8B due to wear of the bending edge 3ba and the bending slit 1b of the fixed shaft 1. In some cases, this bending method realizes bending.

In the bending in the method of bending and cutting the band blade according to the present invention, since bending data is created in consideration of the above-described differences in bending methods, the bending accuracy can be further improved. .

FIGS. 9 (a1) to 9 (a6) are explanatory diagrams of the elastic limit and the time effect of the bending of the band blade in the method of the present invention.
1) to (b3) are explanatory diagrams of the hysteresis effect.

FIGS. 9 (a1) to 9 (a3) show the bent edge 3b.
a shows the case where the bending edge 3ba is further rotated back by the angle δ1 after the abuts on the band blade B, and in this case, the angle δ1 is within the elastic limit of the band blade B. Therefore, the band blade B completely returns to the original straight state due to the springback. Therefore, in order for bending to be effective, it is necessary to rotate the bending edge 3ba so as to exceed this elastic limit in one bending.

FIGS. 9 (a4) to 9 (a6) show a case where the bending edge 3ba is turned back by an angle δ2 exceeding such an elastic limit, and in this case, the springback is stopped. This means that the band blade B has been bent by the angle δ3. The relationship between the elastic limit and the rotation angle for bending is very delicate, and has a great effect particularly when the tip of the bending edge 3ba is worn. In the bending in the method of bending and cutting the band blade according to the present invention, bending data is created in consideration of the relationship between the proportional limit and the wear of the bending edge ba as described above. I can give it.

In the case of FIGS. 9 (a2) and 9 (a5), after the bent edge 3ba rotates by the predetermined angles δ1 and δ2, the bent edge 3ba contacts the band blade B for a certain period of time. If the bent edge 3ba is returned after maintaining the state as it is, the phenomenon that the springback is reduced appears. For example, a phenomenon occurs that the bending generated becomes larger than the angle δ3 in FIG. 9 (a6) even if it is rotated by the same angle δ2. Such current situation is called the time effect of bending, and in the bending in the method of bending and cutting the band blade of the present invention, in consideration of the time effect of bending as described above,
Since the bending data is created, the bending accuracy can be further improved. Even when the data after processing is fed back, the time effect is considered as one of the parameters, so that the bending accuracy can be improved.

FIGS. 9 (b1) to 9 (b3) illustrate the mode of bending at the time of repeated bending. FIG. 9 (b1) shows the mode of bending for the first time, and FIG. 9 (b2) shows the mode where residual stress remains after the second bending. (B3) is the second bending, and the bending edge is
A mode is shown in which the belt blade B does not abut at right angles to the band blade from the beginning, but comes into contact with the side surface of the band blade B already bent by the previous bending.

As is generally known in the mechanics of materials, when a material is removed by applying a load, no deformation remains in the material, but residual stress may remain. FIG. 9 (b
2) shows such a case. In this case, the effect of bending on the rotation angle of the bending edge 3ba is different from that in the first case. Also, in FIG. 9B3, the angle at which the bent edge ba contacts the band blade B is not a right angle from the beginning, and FIG.
The state of bending by pressing and pressing as shown in (b) is shown, and also in this case, the effect of bending on the rotation angle of the bending edge 3ba is different from that in the first case.

In the bending in the method of bending and cutting the band blade according to the present invention, as described above, the bending data is created in consideration of the effect of the previous bending, that is, the hysteresis effect.
Thus, the bending accuracy can be improved. Further, even in the case of feeding back the processed data, the hysteresis effect is considered as one of the parameters, so that the bending accuracy can be improved.

Further, the band blade B is provided with a bridge slack Bd.
Meat part is small. Therefore, even if the bending edge 3ba is rotated by the same angle, the bending angle of the band blade B is different. It is a matter of course that such a bridging effect is also taken into account in the bending process in the method of bending and cutting the band blade of the present invention.

FIG. 10 is an explanatory view showing the structure of the bending data and the flow of feedback in the method of bending and cutting the band blade according to the present invention.

This illustration is a summary of what has been described so far. As can be seen from this figure, this method differs from the prior art in that the data of the punching shape of the sheet material,
That is, when the bending data U3 is created from the CAD data U0, a reference point shift U1 for correcting the bending reference point U2a by feeding back an error U5 between the processing result U4 and the bending data is provided. Bending method data U
3a is considered, and the error U5 is converted to the time effect U3b.
The difference is that the bending process data U3 is corrected by feeding back to the hysteresis effect U3c.

Here, the bending reference point U2a is defined as a pair of left and right bending edges 3ba each contacting the band blade B.
This is calculated from the rotation angle of the bent edge 3ba when returning to the retreat reference point, and is the rotation start position of the bent edge 3ba for bending. The bending contact point U2b refers to a turning angle from the bending reference point to a point where the bending edge 3ba comes into contact with the band blade B (the state of (a1) in FIG. 9). The end 3ba applies bending pressure to the band blade B. The bending elastic limit U2c is the bending edge 3ba
Refers to the minimum turning angle of the bent edge 3ba such that the bending remains on the band blade B when the band blade B returns by applying the bending pressure. That is, the band blade B is not substantially bent unless a bending pressure is applied to the band blade B at the bending edge 3ba beyond the bending elastic limit U2c.

The actual bending of the band blade B is determined by the bending elasticity limit U
This is performed by the substantial bending angle UT of the bending edge 3ba exceeding 2c, and the relationship between the substantial bending angle UT and the bending elastic limit U2c is an important factor in the three types of bending methods described with reference to FIG. I have. Here, these bending contact points U
2b, the bending elastic limit U2c, and the substantial bending angle UT are all represented by the rotation angle of the bending edge 3ba from the bending reference point U2a.

In this method, first, an error U5 from a target bending shape is obtained from a bending processing result U4 performed on the basis of the bending data U3, whereby the bending edge 3ba and the bending edge 3ba are determined. An error of the bending elasticity limit U2c caused by wear of the bending slit 1b is calculated, and the data such as the bending reference point U2a is shifted based on the calculated data to generate the bending data U3. By doing so, it is possible to suppress a decrease in bending accuracy due to wear.

Further, this method is characterized in that the influence on the bending accuracy due to wear is considered in correspondence with the bending method data U3a including data such as the three bending methods described with reference to FIG.

In the bending by pushing (FIG. 8A), the ratio of the bending elastic limit U2c to the substantial bending angle UT is large. In other words, the desired bending is achieved by repeating the substantial bending angle UT slightly exceeding the bending elastic limit U2c. In this case, the bending edge 3ba and the bending slit 1
The effect of a slight error in the bending elasticity limit U2c due to the wear of b has a large effect on bending. Therefore, in the case of bending due to thrust, the influence of wear is greatly evaluated in feedback.

On the other hand, thrust and bending by press (FIG. 8)
(B)) In bending mainly by pressing (FIG. 8C), the ratio of the bending elasticity limit U2c to the substantial bending angle UT is small. In other words, the actual bending angle UT which greatly exceeds the bending elasticity limit U2c is repeated a few times, or a desired bending is achieved by one time. In this case, the influence of the error of the bending elasticity limit U2c due to the abrasion of the bending edge 3ba and the bending slit 1b is smaller than the bending caused by the pushing. Therefore, in the case of these bendings, the evaluation ratio of the influence of wear on feedback is changed according to the ratio of the bending elastic limit U2c to the substantial bending angle UT.

Further, in this method, as described above, the time effect U3b and the hysteresis effect U3c are also reflected in the initial bending data and feedback.

Thus, the bending accuracy in the bending and cutting method of the band blade of the present invention can be further improved.

The method and apparatus for bending and cutting a band blade according to the present invention are applicable not only to the band blade having the above-described blade portion, but also to bending and cutting or punching of band iron having the same cross-sectional shape. Can also be used in the same manner, and in that case, the same effect is exhibited. Therefore, the present invention has a great industrial effect even in such a general sheet metal processing field.

[0128]

According to the method for bending and cutting a band blade according to the first aspect, the band blade can be cut and bent using only one set of a fixed shaft and a processing cylinder. In addition, since the cutting slit and the bending slit provided above and below the same fixed axis are used, the cutting origin and the bending origin, which are the tips of the respective slits, are the same position in the vertical direction, that is, as the processing position of the band blade to be processed. The cutting origin and the bending origin are the same, and in principle, when bending after cutting and cutting after bending, it is not necessary to move the band blade back and forth in order to match the origin of the band blade. Further, since the cutting means and the bending means are provided by the same set of the fixed shaft and the processing cylinder, the apparatus becomes very compact.

Next, the cooperation of the cutting portion on the side having the cutting slit of the fixed shaft, the corner cutting weir end of the cutting outer cylinder, the straight cutting weir end, and the outer corner cutting edge and the inner cutting edge of the processing cylinder. Thus, the corner cutting and the direct cutting of the rear end of the band blade and the direct cutting of the band blade to be processed next can be simultaneously performed by the shear cutting.

According to the bending and cutting method of the band blade according to the second aspect, in addition to the effect of the bending and cutting method of the band blade according to the first aspect, furthermore, the outer peripheral side of the relief window of the processing cylinder. Since the cutting outer cylinder is provided with a rear corner cutting weir end for cutting the front end of the band blade in cooperation with this rear corner cutting edge, the cutting outer cylinder has a cutting weir. In addition to being able to perform the bending and cutting of the band blade in a lump, it is also possible to perform the square cutting of the front end of the band blade, which requires so-called square cutting at both the front end and the rear end. Things.

According to the method for bending and cutting the band blade according to the third aspect, in addition to the effect of the method for bending and cutting the band blade according to any one of the first and second aspects, the bending of the band blade is also reduced. In this case, the time effect of bending and / or the hysteresis effect of the bending are taken into account, so that the bending accuracy is further improved. Also,
These time effect and hysteresis effect are also important factors as parameters when so-called feedback is used, so that the feedback works more effectively and the bending accuracy can be improved.

The apparatus for bending and cutting a band blade according to the fourth aspect is an apparatus for realizing the method according to the first aspect, and has the same effect.

An apparatus for bending and cutting a band blade according to a fifth aspect is an apparatus for realizing the method according to the second aspect, and performs the same processing.

[Brief description of the drawings]

FIG. 1 conceptually illustrates a method of bending and cutting by an example of an apparatus for bending and cutting a band blade according to the present invention, wherein (a) is front end cutting, (b) is bending, and (c) is rear. End cutting, (d) is a cross-sectional view of the main part of the process of cutting the front end corner.

FIGS. 2A and 2B conceptually illustrate an apparatus state of rear end cutting by the band blade bending and cutting apparatus of FIG. 1, wherein FIG. 2A is a longitudinal sectional view of a main part thereof, and FIG. X1 sectional view at

FIGS. 3A and 3B conceptually illustrate an apparatus state of bending by the apparatus for bending and cutting the band blade of FIG. 1, wherein FIG. 3A is a longitudinal sectional view of a main part thereof, and FIG. Sectional view

4A and 4B show a fixed shaft of the apparatus of FIG. 1, wherein FIG. 4A is a front view, FIG. 4B is a cross-sectional view of a cutting slit, and FIG.

5 (a) is a front view, FIG. 5 (b) is a cross-sectional view of a cutting portion, and FIG. 5 (c) is a cross-sectional view of a bending portion.

FIGS. 6A and 6B show a cut outer cylinder of the apparatus of FIG. 1, wherein FIG. 6A is a sectional view taken along line X7 of FIG.

FIG. 7 is an external perspective view showing the entire configuration of the apparatus for bending and cutting the band blade of FIG. 1;

FIG. 8 is an explanatory view showing the relationship between the bending protrusion of the band blade and the press in the method of the present invention.

FIGS. 9 (a1) to (a6) are explanatory diagrams of the elastic limit of bending of the band blade and the time effect in the method of the present invention, and FIGS.
3) is an illustration of the history effect

FIG. 10 is an explanatory diagram showing a structure of bending data and a flow of feedback in the method of bending and cutting the band blade according to the present invention.

11A is a perspective view showing a punching die and a band blade, and FIG.
Is an explanatory view of a straight connecting portion of the band blade, and (c) is an explanatory view of an orthogonal connecting portion of the band blade.

FIG. 12 (a) is a main part configuration diagram of an example of a conventional band blade bending apparatus, and FIG. 12 (b) is an explanatory view of a bending method using the apparatus.

13A and 13B illustrate a bending method according to another example of a conventional band blade bending apparatus, in which FIG. 13A is a cross-sectional view of a main part showing a state immediately before bending, and FIG. 13B is a state during bending. Main part sectional view showing

14A is a longitudinal sectional view of a main part of a conventional band blade cutting apparatus, and FIG. 14B is a cross-sectional view of a main part of the conventional apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed axis 1a Cutting slit 1b Bending slit 2 Processing cylinder 3 Processing window 3a Cutting processing part 3aa Inner cutting edge 3ab Outside angle cutting edge 3ac Outside cutting edge 3b Bending part 3ba Bending edge 4 Release window 4a Rear corner cutting Edge 5 Cutting outer cylinder 5a Front cutting weir 5aa Square cutting weir end 5ab Direct cutting weir end 5b Rear cutting weir 5ba Rear corner cutting weir end 6 Processing base 6a Restraining ring 6b Base 6c Spacer 6e Rotating means 7a First guide roll 7b Bridge processing means 7c First sensor 7d Second guide roll 7e Second sensor 7f Straightening roll 8 Feeding means 8a Feed screw shaft 8b Feed motor 8c Guide shaft 8d Band blade feed block 8e Band blade gripping block 10 Bending and cutting of band blade A A Die B B Band Blade Ba Blade Bb Direct Joint Bc Square Joint Bd Bridge Slack BT Blade Thickness C Cutting origin D Bending origin T Bending gap

Claims (5)

[Claims] 1. A method for bending and cutting a band blade used in a punching die for punching a sheet material such as paper, corrugated cardboard, plastic film, etc., comprising: a feeding means capable of feeding the band blade back and forth; A slit and a bending slit are connected in the axial direction. A fixed shaft that slides up and down so that the band blade passes through the cutting slit during cutting and the band blade passes through the bending slit during bending. A processing cylinder provided with a processing window on the exit side and a relief window on the entrance side provided corresponding to the cutting slit and the bending slit of the fixed shaft, and A cutting outer cylinder provided with a front cutting weir and a rear cutting weir corresponding to a processing window and an escape window of the processing cylinder, which is rotatably and vertically slidably fitted to the processing cylinder; Windows fixed above The inner cutting edge is provided corresponding to the cutting slit of the shaft, and the inner cutting edge for directly cutting the band blade by applying a shearing force from the left and right by the rotation of the processing cylinder to the band blade passing through the cutting slit. On the circumferential side, a cutting portion provided on the outer peripheral side with an outer corner cutting edge for square cutting the band blade and an outer straight cutting edge for straight cutting, provided corresponding to the bending slit of the fixed shaft. A bending section provided with a bending edge for bending the band blade by applying bending pressure from the left and right by the rotation of the processing cylinder is connected to the band blade sent out from the bending slit. The cutting weir is provided on both sides with a square cutting weir end and a direct cutting weir end to be cut against the outer corner cutting edge and the outer direct cutting edge provided on the outer peripheral side of the cutting window of the processing cylinder, When cutting the band blade, the front cutting weir can cooperate with the cutting section of the processing cylinder. To hold the retracted position at other times, while moving the band blade forward, so that the band blade as a whole has the desired punched shape. The front end of the band blade is cut as necessary by the cooperation of the cutting slit of the fixed shaft, the cutting portion of the processing cylinder, and the front cutting weir of the cutting outer cylinder. Then, the bending slit of the fixed shaft, the processing cylinder Bending of the band blade whose front end was cut by the cooperation of the bending part, and then bending by the cooperation of the cutting slit of the fixed shaft, the cutting part of the processing cylinder, and the front cutting weir of the cutting outer cylinder A method of bending and cutting a band blade, characterized in that a front end of a band blade to be processed next can be simultaneously cut by cutting a rear end of the band blade. 2. The cutting window according to claim 1, wherein the relief window of the processing cylinder has a rear corner cutting edge corresponding to an outer corner of the processing window. If the front end of the band blade to be machined next requires a square cut, a rear corner cut of the cutting outer cylinder is provided if the front end of the band blade to be processed next requires a square cut. The weir end is rotated and slid to a cutting position capable of cooperating with the cutting edge of the rear corner of the processing cylinder, and is held in position.The band blade is moved until the front end of the band blade comes out of the cutting slit of the fixed shaft. The method according to claim 1, further comprising: rotating the processing cylinder after retreating the cutting edge; and thereafter, performing a corner cutting of the front end of the band blade by a corner cutting edge. 3. The bending edge of the bending portion applies bending pressure to the band blade when bending the band blade at the bending portion of the processing cylinder. A method of bending and cutting a band blade, wherein a time effect of time and / or a hysteresis effect when a bending edge of the bent portion repeatedly applies a bending pressure to the band blade is considered. 4. An apparatus for bending and cutting a band blade used in a punching die for punching a sheet material such as paper, corrugated cardboard, plastic film, etc., comprising: a feeding means capable of feeding the band blade back and forth; A slit and a bending slit are connected in the axial direction. A fixed shaft that slides up and down so that the band blade passes through the cutting slit during cutting and the band blade passes through the bending slit during bending. A processing cylinder provided with a processing window on the exit side and a relief window on the entrance side provided corresponding to the cutting slit and the bending slit of the fixed shaft, and A cutting outer cylinder provided with a front cutting weir and a rear cutting weir corresponding to a processing window and an escape window of the processing cylinder, which is rotatably and vertically slidably fitted to the processing cylinder; Windows fixed above Provided corresponding to the cutting slit of the shaft, the inner cutting edge that directly cuts the band blade by applying shearing force from the left and right by the rotation of this processing cylinder to the band blade passing through this cutting slit, facing On the inner peripheral side, a cutting part provided on the outer peripheral side with the outer corner cutting edge for square cutting the band blade and the outer direct cutting edge for straight cutting, provided corresponding to the bending slit of the fixed shaft A bending portion provided with a bending edge for bending the band blade by applying bending pressure from the left and right by the rotation of the processing cylinder is connected to the band blade sent out from the bending slit. The front cutting weir has on both sides a square cutting weir end and a direct cutting weir end which are cut ends against the outer corner cutting edge and the outer cutting edge provided on the outer peripheral side of the cutting window of the processing cylinder. When cutting the band blade, the above cutting weir is cut into the above processing cylinder The slide blade is rotated and slid to the cutting position so that it can cooperate with the part, and at other times, the retracted position is maintained.While sending the band blade forward, the band blade has a desired punched shape as a whole. So that the cutting edge of the fixed shaft, the cutting portion of the processing cylinder, the front end of the cutting blade of the cutting outer cylinder may be used to cut the front end of the band blade as necessary, and then the bending slit of the fixed shaft. The band blade whose front end is cut by the cooperation of the bending section of the processing cylinder is bent, and then the cutting slit of the fixed shaft, the cutting section of the processing cylinder, and the cooperation of the front cutting weir of the cutting outer cylinder. An apparatus for bending and cutting a band blade, wherein the front end of a band blade to be processed next can be simultaneously cut by cutting the rear end of the bent band blade. 5. The relief window of the processing cylinder according to claim 4, further comprising a rear corner cutting edge corresponding to an outer corner cutting edge of the processing window, If the front end of the band blade to be machined next requires a square cut, a rear corner cut of the cutting outer cylinder is provided if the front end of the band blade to be processed next requires a square cut. The weir end is rotated and slid to a cutting position capable of cooperating with the cutting edge of the rear corner of the processing cylinder, and is held in position.The band blade is moved until the front end of the band blade comes out of the cutting slit of the fixed shaft. A cutting edge of the band blade is cut by rotating the processing cylinder after retreating, and then a front edge of the band blade is cut by a corner cutting edge.