JP2005211980A - Method and system for sheet metal working - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and system for sheet metal working which prevent deformation of a hole part, a formed part or the like during bend forming and also improve work efficiency through a reduction of extension in the rectangular direction to the bending line, by forming a groove in the bending line position and decreasing a thickness in the bending line portion, taking note of deformation mechanism in the hole part, formed part or the like which is generated during bend forming on a workpiece with the hole part, formed part or the like processed in advance during blanking, near the bending line such as a flange part. <P>SOLUTION: Before bend forming is performed on the workpiece W with the hole part A, formed part or the like hear the bending line M, a designated groove G is formed in the bending line M position. In the case, the designated groove G is formed either stretching through the length of the bending line M or in a fixed interval L on the bending line M. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention focuses on the deformation mechanism of holes, moldings, etc. that occur during bending on workpieces that have holes, moldings, etc. blanked in the vicinity of bending lines such as flanges. By processing the groove at the line position to reduce the thickness of the bend line part, the elongation in the direction perpendicular to the bend line is reduced to prevent deformation of the hole part, molded part, etc. during the bending process. The present invention relates to a sheet metal processing method and a sheet metal processing system for improving efficiency.

  Conventionally, for example, a plate material composite processing machine disclosed in Japanese Patent Application Laid-Open No. 7-185589 has been used.

  This plate material compounding machine was developed for the purpose of eliminating a semi-finished product loading process between two processes by providing a blanking mold and a bending mold in one machine.

Accordingly, blanking and bending are continuously performed with one ram without performing mold replacement, and as described above, the half-product loading process can be eliminated.
JP-A-7-185589

  However, in the conventional plate composite processing machine, as shown in FIG. 8A of the present application, in the blanking process, for example, after the hole a is processed in the vicinity of the bending line m for the flange f, in the bending process, When bending is performed along the bending line m, as shown in FIG. 8B, the hole a is deformed (for example, the original round hole (FIG. 8A) becomes an elliptical hole ( FIG. 8 (B)) is deformed).

  As a result, the value of the product r (FIG. 8 (A)) is reduced. For example, in the case of a complex product in which the shaft passes between the holes a, the shaft does not pass, so the processing must be performed again. In other words, various adverse effects such as a significant reduction in processing efficiency occur.

  That is, as is well known, the workpiece w in which the hole a is processed by the blanking process is bent, and in the bending process, as shown in FIG. 9, the outer surface is placed on a die d, for example, The inner surface is pressed with a punch p along the bending line m.

  Thereby, compressive stress acts on the inner surface, and tensile stress acts on the inner surface, and finally, based on the stress, the workpiece w is in a direction perpendicular to the bending line m (FIG. 8B). ) Elongation occurs, and as described above, the hole a is deformed, for example, the original round hole is deformed into an elliptical hole.

  This is the same even when the molded portion is processed in the vicinity of the bending line m by embossing or the like in the blanking process instead of the hole part a, and the bending is performed along the bending line m in the bending process. When the processing is performed, the molded part is deformed.

  The object of the present invention is to focus on the deformation mechanism of such a hole, molded part, etc., process a groove at the bend line position, and reduce the work plate thickness of the bend line part, thereby reducing the elongation. Thus, the deformation of the hole portion, the molded portion and the like during bending is prevented, thereby improving the processing efficiency.

In order to solve the above problems, according to the present invention,
As described in claim 1, before the bending process is performed on the workpiece W having the hole A, the molding part, or the like in the vicinity of the bending line M, a predetermined groove G is processed at the position of the bending line M. A sheet metal processing method characterized by:
As described in claim 3, the presence / absence information of the hole A, the molding part, etc. and the position information with respect to the bending line M when the hole A, the molding part, etc. are present are detected from the product information. Based on the detection result by the position information detection means 1E and the presence / absence / position information detection means 1E, it is determined whether or not grooving is necessary for the position of the bend line M. Technical means of a sheet metal working system characterized by having a groove machining program creation means 1F for creating a program for machining the groove G of the present invention was taken.

Therefore, according to the configuration of the present invention, attention is paid to, for example, the hole deformation mechanism that occurs during the bending process described above (FIGS. 8 and 9), and the groove machining information by the groove machining program creation means 1F (FIG. 4 ( A)), if a predetermined groove G is machined at the position of the bending line M (FIG. 4B) in the blanking section I (FIG. 1), the thickness of the bending line M can be reduced. Therefore (for example, the true plate thickness T ₁ in FIG. 5 = the nominal plate thickness T ₀ -the depth d of the groove G), the groove (FIG. 6A) is located at the position of the bending line M in the bending portion II (FIG. 1). If the workpiece W on which G has been processed is bent, the single elongation (flange dimension H-mold P, distance D between the center line of the mold D and the end surface of the workpiece W) becomes smaller than the conventional one (Fig. 6B). Therefore, the elongation in the direction perpendicular to the bending line M can be reduced, and the deformation of the hole A during the bending process can be reduced. Preventing, it is possible to improve the processing efficiency.

  As described above, according to the present invention, deformation of the hole portion, the molded portion, etc. that occurs during bending is applied to a workpiece having a hole portion, a molded portion, etc., blanked beforehand in the vicinity of the bending line, such as a flange portion. Focusing on the mechanism, by processing the groove at the position of the bend line and reducing the plate thickness of the bend line portion, the elongation in the direction perpendicular to the bend line is reduced, and the hole, molded part, etc. It is possible to prevent deformation and improve processing efficiency.

Hereinafter, the present invention will be described with reference to the accompanying drawings by embodiments.
FIG. 1 is an overall view showing an embodiment of the present invention. A sheet metal working system according to the present invention has a blanking section I and a bending section II. The blanking section I is a blanking machine 2. The bending unit II is constituted by the bending machine 4 and the control device 3 respectively.

  In FIG. 1, the blanking machine 2 is, for example, a punch / laser complex machine, and the bending machine 4 is, for example, a press brake.

  In the blanking machine 2, blanking processing (step 102 in FIG. 7) as usual is performed on the workpiece W that has been carried in, and a predetermined groove G is processed at the position of the bending line M according to the present invention. (Step 107 in FIG. 7).

  Then, the bending blank material BL in which the groove G is processed is conveyed to the bending machine 4 at the next stage, and bending is performed along the bending line M position in which the groove G is processed. For example, deformation of the hole A is prevented, and a product R having the hole A with little deformation is completed.

  The control devices 1 and 3 of the blanking section I and the bending section II are constituted by NC devices, for example, and the NC devices 1 and 3 are connected to each other via a bidirectional communication line Q as shown in the figure. ing.

  The NC device 1 of the blanking section I includes a CPU 1A, input / output means 1B, storage means 1C, blanking processing program creation means 1D, presence / absence / position information detection means 1E, and groove machining program creation means 1F. And blanking processing control means 1G.

  Among these, the CPU 1A operates the blanking section I according to the present invention (corresponding to steps 101 to 108 in FIG. 7, specifically, a blanking section operation program stored in the storage means 1C described later ( An instruction is given to each means according to (not shown)) to control the entire blanking section I.

  The input / output means 1B inputs product information (for example, FIG. 2), the input product information is stored in the storage means 1C, and the blanking processing program creation means 1D operates as before, and the present invention Reference is made when the presence / absence / position information detecting means 1E and the groove machining program creating means 1F are operated.

  The input / output means 1B is, for example, an operation panel (not shown), and is constituted by input means such as a keyboard and a mouse and output means composed of a screen such as a liquid crystal, and when the product information is input (FIG. 2). Can confirm the input result on the screen, and when the groove machining program creation means 1F described later creates a groove machining program, the creation result can be confirmed on the screen (for example, FIG. 4). ing.

  As described above, the storage means 1C stores the product information input via the input / output means 1B, and also stores the groove machining program according to the present invention (step 105 in FIG. 7).

  In this case, as the product information, for example, there is CAD information, and the CAD information includes the thickness (nominal) of the workpiece W (nominal), the material, the position and length of the bending line M, the presence / absence of the hole A, etc. It includes the position, the bending angle of the product R, etc., and is composed of a development view, a three-dimensional view, and the like.

  The blanking processing program creation means 1D creates a program for performing blanking processing as usual based on the product information.

  For example, in the case of FIG. 2, four corners of a rectangular workpiece W are cut to form flange F portions, and holes A are formed in the flange F portions.

  The presence / absence / position information detection means 1E detects presence / absence information of the hole A, the molded part, and the like and position information with respect to the bending line M when the hole A, the molded part, etc. are present from the product information.

  For example, the product information includes hole information including whether or not the hole A is present and the size, shape, position, etc. of the hole A when present (FIG. 3).

Accordingly, the presence / absence / position information detecting means 1E (FIG. 1) determines the presence / absence information of the hole A and the position information with respect to the bending line M when the hole A exists, for example, the hole information (FIG. 3). The distance Y ₁ between the part A and the bending line M can be detected.

  Then, the detection result is sent to the groove machining program creation means 1F (FIG. 1), and the groove machining program creation means 1F determines whether or not the groove machining is necessary for the bending line M position (FIG. 3). If it is determined that there is a necessity, a program for processing the predetermined groove G (FIG. 4) is created.

For example, in the case of the hole A (FIG. 3), a predetermined value Y ₀ is preset for the distance between the hole A and the bending line M and stored in the storage means 1C (FIG. 1). .

The predetermined value Y ₀ of this distance is a limit value such that if the hole A exists within the distance, the hole A is deformed during bending.

When the detection result of the presence / absence / position information detection means 1E is sent, the groove machining program creation means 1F obtains the predetermined value Y ₀ from the storage means 1C as long as the hole A is present from the presence / absence information of the hole A. by calling, comparing the distance Y ₁ and the predetermined value Y ₀ and bend line M and the hole portion a, if the distance Y ₁ is within a predetermined value Y ₀ (YES in step 104 in FIG. 7) Since it is assumed that the hole A is deformed during the bending process, it is determined that there is a need for the groove process (step 105 in FIG. 7).

  The groove machining program creation means 1F (FIG. 1) creates a program for machining a predetermined groove G (FIG. 4).

  For example, the groove G (FIG. 4A) may have a corner shape or a V shape as shown in the figure, and the length, width, depth, etc. are arbitrarily set in relation to the plate thickness. be able to.

  Further, the predetermined groove G (FIG. 4B) may be processed over the entire length of the bending line M, or may be processed at a constant interval L on the bending line M.

And the groove processing information consisting of the shape, length, width, depth, etc. of the groove G as shown in FIG. 4 passes through the bidirectional communication line Q from the groove processing program creation means 1F (FIG. 1), It is sent to a bending program creating means 3D, which will be described later, constituting the next bending section II, and the grooving information is used to calculate the true plate thickness T ₁ (FIG. 5).

  The blanking machining control means 1G is (1) blanking machining while referring to the conventional blanking machining program by the blanking machining program creating means 1D and the groove machining program by the groove machining program creating means 1F according to the present invention. By giving an instruction to the machine 2, the ram cylinder 2A and the laser oscillator 2B are driven and controlled.

  Thereby, the blanking process including the groove process (FIG. 4) is performed on the workpiece W, and a predetermined bending blank material BL is formed.

  On the other hand, the NC device 3 of the bending section II includes a CPU 3A, an input / output means 3B, a storage means 3C, a bending program creating means 3D, and a bending control means 3E.

  Among them, the CPU 3A operates the bending section II according to the present invention (corresponding to steps 109 to 110 in FIG. 7, specifically, a bending section operation program (not shown) stored in the storage means 3C described later. In accordance with)), an instruction is given to each means to control the entire bending portion II.

  The input / output means 3B inputs product information or groove processing information in addition thereto, and the input information is stored in the storage means 3C, and a bending program is created as usual or by adding groove processing information. Reference is made when the means 3D operates.

  In this case, as already described, the groove machining information by the groove machining program creation means 1F (FIG. 4) enters the input / output means 3B through the bidirectional communication line Q and is stored in the storage means 3C. Similarly, the input / output means 3B is entered through the bidirectional communication line Q and stored in the storage means 3C.

  As described above, data such as product information and groove processing information is sent from the blanking section I side to the bending section II side via the bidirectional communication line Q, and vice versa. For example, product information May be sent to the blanking section I side by inputting from the input / output means 3B on the bending section II side.

  The bending program creating means 3D creates a program for performing bending (step 109 in FIG. 7).

  In this case, when the groove machining program creation means 1F determines that there is a need for groove machining (step 105 in FIG. 7), as already described, the groove machining information is sent to the bending work program creation means 3D. (Step 108 in FIG. 7).

Therefore, as shown in FIG. 5, the bending program creating means 3D uses the depth d in the grooving information, and subtracts the depth d from the nominal plate thickness T ₀ included in the product information. The true plate thickness T ₁ is calculated.

The bending program creating means 3D calculates a D value, an L value, and the like based on the true plate thickness T ₁ .

However, when the hole A does not exist (NO in step 103 of FIG. 7), or when the hole Y is present, the distance Y ₁ between the hole A and the bending line M is greater than the predetermined value Y _0. (NO in step 104 in FIG. 7), since the groove machining program creation means 1F determines that there is no need for groove machining (step 111 in FIG. 7), the bending work program creation means 3D performs the groove machining. Without consideration, the D value, L value, etc. are calculated using the nominal plate thickness T ₀ in the product information as usual (step 109 in FIG. 7).

  In this case, the operation of the presence / absence / position information detection means 1E and the groove machining program creation means 1F on the blanking part I side (FIG. 1) is controlled via the bidirectional communication line Q as the control signal S. It is transmitted from the NC device 1 of the part I to the NC device 3 of the bending part II, and the movement on the blanking part I side can always be monitored on the bending part II side.

Therefore, the bending program creation means 3D monitors the movement of the groove machining program creation means 1F and detects that the groove machining program creation means 1F has determined that there is no need for groove machining (step 111 in FIG. 7). In this case, as described above, a program for bending is created so as to calculate the D value, the L value, and the like using the nominal thickness T ₀ in the product information as described above (step of FIG. 7). 109).

  The bending control means 3E (FIG. 1) gives instructions to the bending machine 4 while referring to the bending program created by the bending program creation means 3D, thereby driving the rams such as the hydraulic cylinders 4C and 4D. By driving and controlling the source, the workpiece W as the bending blank material BL is bent by the punch P mounted on the upper table 4A and the die D mounted on the lower table 4B (FIG. 7). Step 110).

  For example, when groove processing information (groove G (depth 0.6 mm in FIG. 6A, angle 88 °, width 1 mm) is sent from the blanking processing portion I side, the groove G is a bending line. A workpiece W having a plate thickness of 1 mm, processed at the M position and having a hole A at the flange F portion, is placed on a die D (V groove angle 88 °, V width 8 mm, V shoulder R 1.5 mm) and then the workpiece. After positioning the end surface of W against the abutment 4E, for example, when an operator steps on the foot pedal (not shown), the punch P (tip angle 88 °, tip 0.6R) is lowered, and the bending line M Bending is performed along the position.

  As a result, according to the present invention, since the plate thickness of the bend line M portion is reduced due to the grooving performed in the blanking process of the previous process, the one side extension (flange dimension H-mold P, D The distance J) between the center line and the workpiece W end face is, for example, 0.95 mm, which is smaller than the conventional 1.32 mm (FIG. 6B), and the difference in one-elongation is 1.32 mm−0.95 mm. = 0.87 mm.

  Therefore, according to the present invention, the elongation in the direction perpendicular to the bending line M can be reduced, and deformation of the hole A during bending is prevented. For example, there is no inner R, and the outer R is 2.0 mm. Thus, the product R having a small elongation is processed in which the flange F portion in which the hole A is formed is upright.

  In other words, a workpiece having the same plate thickness of 1 mm in which the hole a is machined in the flange f portion without conventional groove processing (FIG. 6B) is used with the same molds P and D (FIG. 6A). Conventionally, if bending is performed, a product r in which the inner radius R is 1.6 mm and the outer radius R is 3.2 mm and the flange portion f where the hole a is formed is processed is processed. Thus, in the present invention, as described above, it was found that the product R with the flange F being upright and having a small elongation is processed, and that the deformation of the hole A during bending is clearly prevented.

The operation of the present invention having the above configuration will be described below with reference to FIG.
Hereinafter, the workpiece W in which the hole A (FIG. 2) is blanked in the flange F portion will be mainly described.
(1) The operation of the blanking section I.

First, product information is input in step 101 of FIG. 7, blanking is performed in step 102, and it is determined in step 103 whether or not there is a hole A. If yes (YES), step in 104, the distance Y ₁ between the bend line M and the hole portion a is determined whether within a predetermined value Y _0, if it is within a predetermined value Y ₀ (YES), in step 105, there need for grooving In step 106, a groove machining program is created. In step 107, the groove G is machined. In step 108, groove machining information is transmitted to the bending program creating means 3D.

  That is, when product information is input via the input / output unit 1B (FIG. 1), the CPU 1A controls the blanking processing program creation unit 1D to perform blanking processing as usual based on the product information. And a blanking process for cutting the four corners of the workpiece W (FIG. 2) and opening the hole A or the like through the blanking process control means 1G according to the blanking process program. Make it.

After the blanking process is finished, the CPU 1A (FIG. 1) selects the presence / absence information of the hole A and the bending line M when the hole A exists from the product information via the presence / absence / position information detecting means 1E. Position information, for example, the distance Y ₁ between the hole A and the bend line M is detected, and the bend line M is detected based on the detection result by the presence / absence / position information detection means 1E via the groove machining program creation means 1F. Determine whether there is a need for grooving the position.

Then, the groove machining program creation means 1F, when the presence / absence information of the hole A is present and the hole A is present, next, the distance Y ₁ between the hole A and the bending line M (FIG. 3). The predetermined value Y ₀ is compared, and if it is within the predetermined value Y _0, it is assumed that the hole A is deformed at the time of bending, and it is determined that there is a need for groove processing, and the predetermined groove G (FIG. 4) bend line Create a program for machining to the M position.

The CPU 1A that has detected that the grooving program has been created (FIG. 1) controls the blanking process control means 1G, and in accordance with the grooving program, a predetermined groove is positioned at the bending line M on the workpiece W (FIG. 4). After processing G, the groove processing information is sent to the bending program creating means 3D via the bidirectional communication line Q.
(2) Operation of the bending portion II.

  In step 109 of FIG. 7, a bending program is created, and in step 110, bending is performed.

That is, the CPU 3A on the bending part II side (FIG. 1) monitors the movement on the blanking part I side, and the groove machining program creation means 1F determines that there is a need for groove machining. When it is detected that the grooving information has been sent, the true plate thickness T ₁ (FIG. 5) = the nominal plate thickness T ₀ -the groove G The true plate thickness T ₁ of the workpiece W is calculated by an arithmetic expression of the depth d, and the D value, the L value, etc. are calculated based on this, and the dies P and D used for each bending order are calculated. Then, a program for bending is created so as to calculate a mold layout and the like.

  After creating the bending program, the CPU 3A (FIG. 1) controls the bending control means 3E, and refers to the bending program, while the predetermined groove G (FIG. 6A) is processed into the bending line M processed. Then, the workpiece W is bent.

In the case where there is no hole A (NO in step 103 in FIG. 7), even when the hole A is present, the distance Y ₁ between the hole A and the bending line M is greater than a predetermined value Y ₀ ( When the groove machining program creation means 1F determines that there is no need for groove machining (step 111 in FIG. 7), the bending program creation means 3D performs the conventional bending work. After the program is created (step 109 in FIG. 7), bending is performed (step 110 in FIG. 7).

  In the description of the present invention, the prevention of deformation of the hole A has been described in detail. However, the present invention is not limited to this, and is applicable to the prevention of deformation of the molded portion, and of course has the same effect. is there.

  As described above, the present invention provides a mechanism for deformation of holes, moldings, etc. that occur during bending on workpieces having holes, moldings, etc. that have been blanked in the vicinity of bending lines such as flanges. Pay attention and process the groove at the bend line position to reduce the thickness of the bend line part, thereby reducing the elongation in the direction perpendicular to the bend line and deforming the hole, molded part, etc. The present invention is applied to a sheet metal processing method and a sheet metal processing system for preventing and improving processing efficiency.

1 is an overall view showing an embodiment of the present invention. It is a figure which shows the product information by this invention. It is a figure which shows the hole information by this invention. It is a figure which shows the groove processing information by this invention. It is a figure which shows the example of calculation of the true plate | board thickness by this invention. It is effect explanatory drawing by this invention. It is a figure which shows the flowchart for demonstrating operation | movement of this invention. It is explanatory drawing of a prior art. It is reason explanatory drawing of FIG.

Explanation of symbols

1 NC device of blanking machine 2 1A CPU
1B I / O means 1C Storage means 1D Blanking program creation means 1E Hole detection means 1F Groove machining program creation means 1G Blanking control means 2 Blanking machine 3 NC device of bending machine 4 3A CPU
3B Input / output means 3C Storage means 3D Bending program creation means 3E Bending control means 4 Bending machine P Press brake punch D Press brake die W Workpiece

Claims (5)

A sheet metal working method characterized in that a predetermined groove is machined at a position of a bend line before the work having a hole portion, a forming portion, or the like in the vicinity of the bend line is bent. The sheet metal processing method according to claim 1, wherein the predetermined groove is processed over the entire length of the bending line or at a constant interval on the bending line. Presence / absence / position information detection means for detecting presence / absence information of a hole, a molding part, etc. and position information with respect to a bending line when the hole, molding part, etc. are present, and the presence / absence / position information detection Based on the detection result by the means, it is determined whether there is a need for grooving at the bending line position, and if it is determined that there is a need, a grooving program creation for creating a program for machining a predetermined groove A sheet metal processing system comprising means. 4. The sheet metal processing system according to claim 3, wherein the groove processing information by the groove processing program creation means is transmitted to the bending program creation means to create a predetermined bending program. 5. The sheet metal processing system according to claim 4, wherein the bending program creating means calculates the true sheet thickness by subtracting the depth of the groove included in the groove processing information from the nominal sheet thickness included in the product information.

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