JPH0736934B2 - Knife processing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long thin sheet-like knife for punching a sheet of paper, plastic, corrugated cardboard or the like into a predetermined shape by punching press working or for making a crease ( The present invention relates to a processing device for cutting a knife from a material and bending it into a predetermined shape.

[0002]

2. Description of the Related Art For example, as shown in FIG. 5, a knife A of this type has a thin wall (for example, a wall thickness of 0.4 to 1.0 mm), a strip shape, a cutting edge 1, and a substantially rectangular cross section. It is formed in a shape. The knife A is used by being fitted and fixed in the knife fitting groove 3 formed continuously on the knife holding base 2 made of wood, metal, resin or the like. The knife fitting groove 3
Are formed in advance into a predetermined shape (shape corresponding to a punching die) by, for example, laser processing. On the other hand, the knife A
Is placed with its back 4 side along a surface plate (not shown), and is bent by being pinched by a pair of processing dies from both side surfaces of the knife A, and is subjected to predetermined bending. The bent portion 5 is formed. The processing of the knife fitting groove 3 using the laser described above has been conventionally performed by using a CAD to create a geometrical shape (pattern data) of the knife fitting groove 3 and using the CAD data. Therefore, it is convenient to use the CAD data to bend the knife A that is fitted into the knife fitting groove 3. FIG. 6 is a block diagram showing a schematic configuration of an example of a conventional knife processing apparatus B using such CAD data, and FIG. 7 is an explanatory view showing a state during bending of the knife A. As shown in FIG. 6, the conventional knife processing apparatus B includes a graphic data input unit 6 for inputting graphic data D1 representing the geometrical bending shape of the knife A from CAD data, and the graphic data input unit 6 described above. Cutting processing data D of the knife A based on the input graphic data D1
3 and the bending processing data D4 are calculated geometrically, a cutting processing section 9 for cutting the material of the knife A based on the cutting processing data D3 calculated by the calculation section 8, and a cutting processing The material cut by the section 9 is composed of a bending section 10 and the like that performs bending processing based on the bending data D4 similarly calculated by the calculation section 8.

Here, as shown in FIG. 7, the bending portion 10 is bent by applying a bending force to the cut material by using a fixed die 10a, which is a pair of processing dies, and a moving die 10b. The material of the knife A is sent out each time this bending process is performed, and a product of the knife A having a desired bending state is obtained. Therefore, the bending operation data D4 includes the bending operation amount (pushing amount) Mi of the processing die 10b with respect to the material of the knife A, the feeding operation amount (feeding amount) Si of the material of the knife A, and the number of bending operations N. Is included (i = 1, 2, ...), and the bending shape of the knife A is a polygonal shape including a plurality of bent portions and straight portions connecting the bent portions. Hereinafter, the processing procedure of the knife A by the conventional device B will be described with reference to FIGS.
A brief description will be given with reference to FIG. 7. The operator inputs the graphic data D1 of the knife A using the graphic data input unit 6. As the graphic data D1, CAD data prepared in advance for processing the knife mount 2 is used. From the figure data D1 by the calculation unit 8, the knife A
The total length (total distance) of the straight line portion and the bent portion of the center line is calculated and output to the cutting processing unit 9 as cutting processing data D3, and the bending processing data is also calculated by the arithmetic unit 8 according to a predetermined rule. D4 is created, bending part 1
It is output to 0. The material of the knife A is cut by the cutting unit 9 based on the cutting data D3, and then the bending unit 1 is cut based on the bending data D4.
Bending is performed by 0 and commercialized. The knife A that has been commercialized is then manually planted on the knife holder 2 that has been separately grooved based on the CAD data D5.

[0004]

When the knife A and the knife holder 2 are machined on the basis of the output data and the CAD data D3 to D5 by the conventional knife machining apparatus B as described above, the machining shapes of both are processed. May not match. Therefore, at the time of planting the blade, the knife A cannot be fitted and fixed in the knife fitting groove 3 of the knife holding table 2, or even when the knife A can be fitted and fixed, when the plurality of knives are fitted and fixed, the knives interfere with each other. On the contrary, there is a possibility that a gap may be generated, the sheet processing performance required for the knife A may be impaired, and the life of the knife A itself may be shortened. This is often due to a non-linear characteristic such as the viscoelastic characteristic of the knife A in processing (spring back or the like), and is particularly remarkable when the bending radius of the bent portion of the knife A is small. Therefore, the present invention has been devised in view of the above circumstances, and an object thereof is to provide a knife processing apparatus capable of accurately processing the knife by considering the characteristics relating to the bending of the knife. is there.

[0005]

In order to achieve the above-mentioned object, the main means adopted by the present invention is the gist of the invention, namely, the bending for inputting the geometric bending shape of a long thin plate knife. A knife processing apparatus comprising processing shape input means and calculation means for calculating knife bending data based on the geometric bending shape input by the bending shape input means, Characteristic data input means for inputting characteristic data relating to bending is provided, and the geometric bending shape input by the bending shape inputting means by the arithmetic means and the characteristic data input by the characteristic data inputting means. The knife processing device is characterized in that the bending processing data of the knife is calculated based on Further, a bending shape input means for inputting a geometric bending shape of the long thin plate-shaped knife, and a knife bending tool based on the geometric bending shape input by the bending shape input means. In a knife processing device comprising a calculation means for calculating bending data, characteristic data input means for inputting characteristic data relating to bending processing of the knife, and actual measurement values stored in a database of actual measurement values relating to bending processing of the knife. A geometric data input by the bending shape inputting means is provided, which comprises a storage unit and characteristic data correcting means for correcting characteristic data relating to bending of the knife based on the database of the measured values. Bending data of the knife can be calculated based on the bending shape and the characteristic data corrected by the characteristic data correcting means. A processing apparatus of the knife according to claim. Further, in the knife processing device, the actual measurement value regarding the bending process is the bending angle data when the pressing amount by the processing die is variously changed. Further, in the knife processing device, the actual measurement value regarding the bending process is the bending angle data when the pushing amount by the processing die is constant and the feeding amount of the knife is variously changed.

Further, the apparatus is provided with a bending shape input means for inputting a geometric bending shape of a long thin plate knife,
In a knife processing apparatus for obtaining the total length of the knife based on the geometrical bending shape input by the bending shape inputting means, the total length of the knife is defined as the center of the bending portion in the bending shape of the knife. This is a knife processing apparatus characterized in that calculation is performed in consideration of shaft elongation. Furthermore, it is a knife processing apparatus that takes into consideration the amount of elongation due to the component force applied to the bending portion in the bending direction when calculating the total length of the knife. Further, the knife machining apparatus is such that the allowable range of the geometrical shape is input by the bending shape inputting means in association with the geometrical shape of the knife. Furthermore, it is the sum of the bending shape angles in the bending portion when the knife is processed into a bending shape having a plurality of bending portions by applying bending and / or feeding operation of the knife. It is a knife processing apparatus that determines the pressing amount and / or the knife sending amount by a processing die such that the number of bending operations is an integral number within the entire bending angle. Furthermore, the geometric bending shape of the knife input by the bending shape input means is used when processing the knife holder.
It is a processing device for a knife having a shape represented by AD data. The characteristic data relating to the bending of the knife includes material characteristics, characteristics of the machine part that performs the bending, and the like.

[0007]

According to the present invention, the geometric bending shape of the long thin plate knife is inputted by the bending shape input means, and the geometric bending shape is inputted by the bending shape input means. When the knife bending data is calculated by the computing means based on the shape, the characteristic data relating to the knife bending is inputted by the characteristic data input means. Then, based on the geometrical bending shape input by the bending shape inputting means and the characteristic data input by the characteristic data inputting means, knife bending data is calculated by the computing means. Since the bending data calculated in this manner takes into account the characteristics relating to the bending of the knife, the bending data is used to bend the knife so as to satisfy the sheet processing performance of the knife. Processing can be performed. Further, the characteristic data relating to the bending of the knife is inputted by the characteristic data inputting means, and the database of the actual measured values relating to the bending of the knife is stored in the actually measured value storage section. The characteristic data relating to the bending process of the knife is corrected by the characteristic data correction means based on the database of the measured values. Then, the bending data of the knife is calculated by the arithmetic means based on the geometrical bending shape input by the bending shape inputting means and the characteristic data corrected by the characteristic data correcting means. As described above, by correcting the characteristic data regarding the bending process of the knife on the basis of the actual measurement value, the accuracy of the calculated bending process data of the knife can be improved. Further, it is considered that the actual measurement values regarding the bending work are bending angle data when the pressing amount by the working die is variously changed. Further, it is considered that the actually measured values concerning the bending work are bending angle data when the pushing amount by the working die is kept constant and the feeding amount of the knife is variously changed. The accuracy of the calculated knife bending data can be further improved by using the actual measurement values relating to such various bending operations to correct the characteristic data.

Further, the geometric bending shape of the long thin plate knife is inputted by the bending shape inputting means, and based on the geometric bending shape inputted by the second bending shape inputting means. When the total length of the knife is obtained by calculating the total length of the knife, the total length of the knife is calculated in consideration of the elongation of the central axis of the bent portion in the bent shape of the knife. Since the overall length of the knife calculated in this way takes into account the bending characteristics of the knife, the cutting data including the overall length of this knife is used to form the bent knife on the knife holder. The knife can be cut so that it fits exactly in the formed knife fitting groove. Furthermore, when calculating the total length of the knife,
The amount of elongation due to the component force applied to the bending portion in the bending direction is considered. In this way, the accuracy of the cutting data of the knife can be improved by considering the elongation amount related to the bending characteristic of the knife when calculating the total length of the knife. Further, in association with the geometrical shape of the knife, the allowable range of the geometrical shape is input by the bending shape inputting means. The accuracy of the bending data can be ensured by using the allowable range of the geometrical shape of the knife input in this way for calculating the bending data. Further, when the knife is processed into a bending shape having a plurality of bending portions by applying bending and / or feeding operation of the knife, a total bending angle which is a sum of bending angles in the bending portion. In the above, the pushing amount by the working die and / or the feeding amount of the knife is determined so that the number of bending operations is an integral number. By using the pushing amount and / or the feeding amount of the knife included in the thus-determined bending data of the knife, the bending of the knife can be accurately performed. Further, the geometric bending shape of the knife input by the bending shape input means is used when processing the knife holder.
It is assumed that the shape is represented by the D data. By effectively using the CAD data in this way, it is possible to efficiently input the bending shape and also to match the bending shape with the shape of the knife holder.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the accompanying drawings for the understanding of the present invention. The following embodiments are examples of embodying the present invention and are not intended to limit the technical scope of the present invention. 1 is a block diagram showing a schematic configuration of a knife processing apparatus B'according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the influence of springback in bending, and FIG. 3 is a bending in bending. FIG. 4 is an explanatory view showing the deviation of the total angle, and FIG. 4 is an explanatory view showing a state during bending. Incidentally, FIG.
The same reference numerals are used for the elements common to the block diagram showing the schematic configuration in the example of the conventional knife processing apparatus B shown in FIG. As shown in FIG. 1, the knife processing apparatus B'according to the present embodiment has a graphic data input section 6 (bending shape input) for inputting graphic data D1 representing the geometric bending shape of the knife A from CAD data. Means) and knife A
Material characteristics (for example, the type of material and viscoelasticity of the material), characteristics of the machine part that performs bending (for example, various parameters used for various calculations to be described later such as the gap between the fixed die 10a and the moving die 10b) Characteristic data D2
The knife A based on the characteristic data input section 7 (corresponding to characteristic data input means) for inputting, and the graphic data D1 and the characteristic data D2 input by the data input sections 6 and
Of the knife A based on the cutting part data D3 'and the bending part data D4' which are calculated by the calculating part 8 '(corresponding to calculating means) and the cutting part data D3' calculated by the calculating part 8 '. A cutting part 9 that performs a process, and a bending part 10 that is a mechanical part that performs a bending process on the material cut by the cutting part 9 based on the bending data D4 ′ that is also calculated by the calculating part 8 ′. It consists of The graphic data input unit 6 is also used to input the allowable range D1 ′ of the geometrical shape of the knife A. Here, as shown in FIG. 4 (a), the bending portion 10 includes a fixed die 10a, which is a pair of processing dies, on the cut material,
Bending is performed by applying a bending force using the moving die 10b, and the material of the knife A is sent out each time the bending is performed to obtain a product of the knife A having a desired bending shape and the like. Therefore, the bending data D
4'is a bending operation amount (pushing amount) Mi of the moving die 10b with respect to the material of the knife A, a feeding operation amount (feeding amount) Si of the material of the knife A, and a bending operation number N.
This is similar to the conventional example in that and are included.

However, as described above, the calculation unit 8'uses the bending data D using the characteristic data D2 concerning the knife A.
4 ′ and the point of calculating the cutting data D3 ′ are characteristic points which have not existed in the past, and the total length of the knife A is extended by the arithmetic unit 8 ′ to extend the central axis of the bent portion in the bent shape of the knife A. It is also different from the conventional example in that it is calculated in consideration of the above, and the total length is corrected if necessary. Further, a measured value storage unit 11 that stores a database of measured values related to bending of the knife A, and a characteristic data correction unit 12 that corrects the characteristic data D2 based on the measured value database.
(Corresponding to characteristic data correction means), and the knife is based on the graphic data D1 input by the graphic data input unit 6 and the characteristic data D2 'corrected by the characteristic data correction unit 12 by the arithmetic unit 8'. Bending data of A D4 '
It is also different from the conventional example in that The calculation procedure of the device B'will be briefly described below with reference to FIGS. The operator inputs the characteristic data D2 of the knife A using the characteristic data input unit 7. As the graphic data D1, CAD data D5 for laser processing the knife holder 2 and the like is input using the graphic data input unit 6. By using the CAD data D5 used when the knife holder 2 is processed as the graphic data D1 input by the graphic data input means 6, the data can be efficiently input and the knife can be efficiently used. It is also possible to match the bending shape of A and the processing shape of the knife holder 2. As a result, even when a series of processing of the knife A is automated, when the finished knife A is planted on the knife holding table 2, the knives interfere with each other and, conversely, a gap is generated, so that the knife A is not processed. There is no fear of impairing the sheet processing performance required for the above and shortening the life of the knife A itself. Further, it is possible to manually input a part of the graphic data D1. Similarly, the allowable range D1 ′ of the geometrical shape of the knife A is also input by the graphic data input unit 6. The computing unit 8'performs various computations based on these input data D1, D1 ', D2, and cutting data D3' and bending data D4 '.
Are output.

The bending data D4 'includes the bending movement amount Mi and the feeding movement amount Si, etc. (where i = 1, 2, ...) Which are the control amounts of the bending portion 10 as described above. It is determined as follows. As described above, the bending section 10 performs bending by applying a bending force to the material of the knife A that has been cut using the pair of processing dies 10a and 10b, and sends out the material each time this bending is performed. A knife A having a desired bending shape is formed. For this reason, the bending shape of the knife A is a geometrical shape including a plurality of bent portions and a straight line portion connecting the bent portions, that is, a polygonal shape. The error between each side of this polygon and the arc inscribed or circumscribed on each side is within the allowable range D1 '.
The number of bending operations N is determined by calculation under a rule such that Thus, by using the allowable range D1 'of the geometrical shape of the knife A for calculating the bending data D4', the accuracy of the bending data D4 'can be ensured. The permissible range D1 'may be set and stored in advance, and may be corrected by the graphic data input unit 6 if necessary. Naturally, the number of bending operations N must be an integer. Therefore, the shape of the polygon that is in contact with the bent portion is changed within the allowable range, and the length of each side and the bending angle at which the number of operations N is an integer N are determined. The above rule shows a non-linear relationship between the radius R of the arc and the number of bending operations N, and a relational expression obtained in advance is used. Also, the radius R of the above-mentioned arc is the figure data D
This is used because it is included in 1. The characteristic data D2 so that the number of bending operations N thus determined is satisfied.
The bending motion amount M is calculated using various parameters included in
i, the delivery operation amount Si is calculated. All of these series of operations are executed by the operation unit 8 '. A calculation example will be described later. As described above, the deformation of the knife A caused by bending is affected by the viscoelastic property of the material. Even if it processes, a desired bending shape cannot be obtained. Therefore, in this embodiment, the bending process data D is calculated based on the relational expression stored in advance in the calculation unit 8'using various parameters included in the characteristic data D2 input from the characteristic data input unit 7 as described above.
4 '(bending movement amount Mi, feeding movement amount Si) is calculated.

However, since the viscoelastic properties of the above materials are non-linear and change variously depending on the materials, it is extremely difficult to prepare complete characteristic parameters for every material from the beginning. Therefore, as a further improved embodiment, a method is adopted in which a bending process is experimentally performed for each material, a database of measured values is created, and the characteristic parameters are corrected based on this data. A specific example will be described below. First, a case will be described in which the bending angle data obtained when the amount of bending movement by the moving die 10b is variously changed is used as the actual measurement value. As the material of the knife A, an appropriate material is selected in consideration of workability and durability, but steel is generally used. It is well known that when such a thin steel plate is subjected to bending, the deformation returns after the bending force is removed by a springback phenomenon as an example of viscoelastic properties. This phenomenon is shown in FIG. Therefore, in bending, it is necessary to use the bending movement amount Mi ′ of the moving die 10b when the springback amount α is added to the desired bending angle θi. FIG. 2 shows the relationship between the bending angle θi and the bending movement amount Mi ′.
A nonlinear correlation as shown in (b) is established. This correlation is obtained in advance for each type of material of the knife A by experiments and used as a database of measured values. That is, the characteristic data correction unit 12 corrects the characteristic data D2 based on the database of the measured values. Then, the bending data is calculated by the calculating unit 8'on the basis of the corrected characteristic data D2 ', whereby bending data D4' (1) in consideration of the springback amount α is obtained.

Next, the moving die 10 is used as the measured value.
A case will be described in which the bending angle data obtained by variously changing the feeding motion amount of the knife A while keeping the bending motion amount according to b constant. Since the bending process of the knife A is performed by feeding the material each time it is bent as described above, it is necessary to determine the bending process data D4 'so that the total bending angle Σθi becomes the desired total bending angle θ. However,
In reality, the total bending angle Σθi and the desired total bending angle θ
There will be a gap between This state is shown in FIG. This phenomenon becomes more remarkable when the bending angles θi and θi + 1 in the figure are large or the bending is performed in the opposite direction, and when the feeding operation amount Si is small. This is considered to be because the residual stress caused by the plastic deformation of the material in each bending process affects the elastic energy of the material. Therefore, in the bending process, when the deviation amount β is considered as the total bending angle Σθi, the feeding operation amount S
It is necessary to use i '. Then, when the relationship among the deviation amount β, the desired total bending angle θ, and the feeding operation amount Si ′ was obtained by an experiment, a three-dimensional correlation as shown in FIG. 3B was obtained. It was This correlation is also obtained in advance for each type of material of the knife A and used as a database of measured values. That is, also in this case, the characteristic data D2 is corrected by the characteristic data correction unit 12 based on the database of the measured values. Then, the bending data is calculated by the calculation unit 8'on the basis of the corrected characteristic data D2 ', so that bending data D4' (2) considering the deviation amount β is obtained. As the above-mentioned actual measurement values, those obtained by experiments in advance as described above are stored in the actual measurement value storage unit 11. You can also do it.

Next, the cutting processing data D3 'will be described. The cutting data D3 'of the knife A is basically the total length L (total distance) of the straight portion and the bent portion of the knife A obtained from the figure input data D1 by the calculation unit 8'. In the embodiment, for the bending portion, the length of the central axis in consideration of the elongation due to bending is used instead of the length of the center line directly calculated from the conventional CAD data. Although the knife A has a thin plate shape, it actually has a constant thickness t.
As shown in (a), a portion P that abuts the fixed die 10a.
This is because, when bending is performed so that it bends around the center, the center axis extends, which becomes a product error. As is clear from the figure, this tendency is particularly remarkable when the bending angle is large, and when the geometrical calculation of the total length L is performed, the bending characteristics of the knife A are taken into consideration and the center of the bent portion is considered. It can be solved by considering the elongation of the shaft. That is, when the knife A is bent, tensile stress acts and expands outside the neutral axis X, which is the locus of the point where stress reverses, and compression stress acts inside and contracts. The stress distribution in this case is shown in Fig. 4.
As shown in (b), the neutral axis X passes inside the central axis Y. As a result, the central axis Y produces an elongation m, and an elongation corresponding to this elongation m is produced in excess of the geometrical dimension calculated from the CAD data. Since the elongation m is based on the processing characteristics of the material, it can be calculated from the characteristic data D2. By using the cutting processing data D3 'in consideration of the bending characteristics of the knife A obtained in this way, the shape of the knife A after bending satisfies the sheet processing performance to be used for press working and the like. The cutting length can be determined by determining the total length of the knife A so that the cutting is performed. However, regarding the elongation during bending, there may occur elongation of the material that cannot be represented by the above calculation, etc. Therefore, the following points should be taken into consideration when calculating the total length L.

That is, when the total length L of the knife A is calculated, the elongation amount n due to the component force applied to the bending portion in the bending direction is considered. That is, when the bending process of the knife A is performed by the bending process unit 10, as shown in FIG.
The bending force F by b acts. Then, when the bending force F is further decomposed into a component force F1 in the longitudinal direction of the material and a component force F2 in the thickness direction of the material perpendicular to the bending force F1, there is a phenomenon that the material of the knife A is stretched by the component force F1. Occurs. The elongation amount n can be uniquely obtained from the material characteristics based on the component force F1 and the sectional shape of the knife A. Taking this into consideration, the total length L is calculated. As described above, in calculating the total length L of the knife A, not only the elongation amount m related to the bending characteristic of the knife A but also the elongation amount n is taken into consideration. The precision of ′ can be improved. In the above embodiment, two specific examples of the database of measured values used to correct the characteristic data D2 have been described. However, in actual use, other than the above actual measured values, for example, the deviation amount γ of the bending point of the knife A is set. Etc. may be taken into consideration. That is,
When bending the knife A, the first bending point P does not coincide with the central portion Q in the longitudinal direction of the bending portion. As shown in FIG. 4 (a), this is the fixed die 10 of the bending part 10.
This is because the actual bending process is performed around the bending point P that is the contact portion between the a and the knife A. The deviation amount γ between the bending point P and the central portion Q can be obtained by using a geometrical method. A database of actually measured values in consideration of this deviation amount γ may be used. Although the pair of processing dies 10a and 10b having a shape as shown in FIG. 4 (a) is used as the bending portion 10 in the above embodiment, the pair of processing dies is a male type and a female type in actual use. There is no problem even if a bending machine that does

[0016]

Since the present invention is configured as described above, the characteristic relating to the bending of the knife, which is calculated on the basis of the geometrical bending shape of the knife and the characteristic data relating to the bending of the knife. By using the bending processing data in consideration of the above, it is possible to perform the bending processing of the knife so as to satisfy the sheet processing performance of the knife. Further, by correcting the above-mentioned characteristic data on the basis of the actual measurement value, it is possible to improve the accuracy of the knife bending data calculated. Further, the accuracy of the calculated knife bending data can be further improved by using the actual measurement values for various bending operations to correct the characteristic data. In addition, the total length of the above knife,
By using the cutting data in consideration of the bending characteristics of the knife obtained by taking into consideration the elongation of the central axis of the bent portion in the bending shape of the knife, the bent knife can be used as a knife mounting table. The knife can be cut so that the knife fit groove formed can be accurately fitted in the groove. Furthermore, in calculating the total length of the knife, the accuracy of the knife cutting data can be improved by considering the amount of elongation related to the bending property of the knife. Further, by using the allowable range of the geometrical shape of the knife for calculating the bending data, the accuracy of the bending data can be secured. Further, when the knife is processed into a bent shape having a plurality of bent portions by applying a bending operation and / or a feeding operation to the knife, the total bending which is a total of bending angles in the bent portion By using the bending motion amount and / or the feeding motion amount determined so that the number of bending motions is an integral number within an angle, the bending process of the knife can be accurately performed. Further, by effectively utilizing the CAD data when processing the knife holder, it is possible to efficiently input the bending shape and also to match the bending shape with the processing shape of the knife holder. Can be planned. As a result, even when a series of processing of the knife A is automated, when the finished knife A is manually planted on the knife holding table, the knives interfere with each other or a gap is generated, and thus the knife A itself. There is no risk of shortening the life of the.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a knife processing apparatus B ′ according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing the influence of springback in bending.

FIG. 3 is an explanatory diagram showing a deviation of a total bending angle in bending.

FIG. 4 is an explanatory view showing a state during bending.

FIG. 5 is an explanatory view showing a state where the knife A is cut from a material.

FIG. 6 is a block diagram showing a schematic configuration of an example of a conventional knife processing apparatus B.

FIG. 7 is an explanatory view showing a state during bending of the knife A.

[Explanation of symbols]

 A ... Knife B '... Knife processing device 6 ... Graphic data input section (corresponding to bending shape input means) 7 ... Characteristic data input section (corresponding to characteristic data input means) 8 ... Calculation section (corresponding to calculation means) 9 ... Cutting process part 10 ... Bending process part 11 ... Actual measured value storage part 12 ... Characteristic data correction part (corresponding to characteristic data correcting means) D1 ... Graphic data (corresponding to geometric bending shape) D1 '... Allowable range D2 ... Characteristic data D2 '... Corrected characteristic data D3' ... Cutting data D4 '... Bending data

Claims (9)

[Claims] 1. A bending shape input means for inputting a geometric bending shape of a long thin plate knife, and based on the geometric bending shape input by the bending shape input means. A knife processing device comprising a computing means for calculating knife bending data, comprising characteristic data input means for inputting characteristic data relating to bending of the knife, wherein the computing means uses the bending shape input means. A knife bending apparatus, wherein knife bending data is calculated based on the input geometric bending shape and the characteristic data input by the characteristic data input means. 2. A bending shape input means for inputting a geometric bending shape of a long thin plate knife, and based on the geometric bending shape input by the bending shape input means. In a knife processing device comprising a computing means for calculating knife bending data, characteristic data input means for inputting characteristic data concerning the bending processing of the knife, and a database of measured values concerning the bending processing of the knife are stored. A measured value storage unit; and characteristic data correction means for correcting characteristic data relating to bending of the knife based on the measured value database,
The computing means calculates knife bending data based on the geometric bending shape input by the bending shape inputting means and the characteristic data corrected by the characteristic data correcting means. Knife processing equipment. 3. The knife machining device according to claim 1, wherein the actual measurement value relating to the bending work is bending angle data when the pressing amount by the working die is variously changed. 4. The knife machining apparatus according to claim 1, wherein the actual measurement value relating to the bending is bending angle data when the pushing amount by the machining die is kept constant and the feeding amount of the knife is variously changed. 5. A bending shape input means for inputting a geometric bending shape of a long thin plate-shaped knife is provided, and the geometric bending shape input by said bending shape input means is provided. A knife processing apparatus for obtaining the total length of the knife based on the above, wherein the total length of the knife is calculated in consideration of the elongation of the central axis of the bent portion in the bent shape of the knife. 6. The knife processing apparatus according to claim 5, wherein when the total length of the knife is calculated, the amount of elongation due to the component force applied in the bending direction of the bent portion is taken into consideration. 7. The machining of a knife according to claim 1 or 2, wherein an allowable range of the geometrical shape is input by the bending shape inputting means in association with the geometrical shape of the knife. apparatus. 8. The sum of bending shape angles in the bending portion when the knife is processed into a bending shape having a plurality of bent portions by applying bending and / or feeding operation of the knife. 8. The knife processing apparatus according to claim 1, wherein the pressing amount by the processing die and / or the feeding amount of the knife is determined such that the number of bending operations is an integral number within the entire bending angle. 9. The geometrical bending shape of the knife input by the bending shape input means is a shape represented by CAD data used when processing a knife holder, according to claim 1, 2, or 5. Knife processing equipment.