JP2009022976A - Nibbling method for punch press, and punch press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nibbling method for punch press capable of seamlessly machining a long hole in a sheet material. <P>SOLUTION: In this nibbling method for punch press, a plurality of punch holes are punched such that adjacent holes are partially overlapped, thereby punching a long hole 30 longer in the flat surface direction than a single punch hole in the sheet material W. The method includes the steps of: forming a groove 31 along the edge of the desired long hole 30 at least on one side surface of the sheet material W; and performing nibbling by making a punch die 4 for punching go along the groove 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a punching method for processing a long hole in a plate material using a punch press, and a punch press used therefor.

  When a long hole is processed in a plate material using a punch press, a follow-up processing method is adopted in which a plurality of punch holes are continuously formed along a desired long hole shape. However, according to this method, a small projection-like seam is generated at the joint of each punch hole in the long hole. Therefore, for the long holes located in places where accuracy is required or where it is easily noticeable when it becomes a product, the seams were removed by manual work such as file or sanding after the processing of the long holes was completed. .

Patent Document 1 discloses a technique for removing burrs formed around a punched hole when a plate material is punched.
JP 2006-95597 A

  As described above, removing the seam manually after processing the long hole by the punch press is troublesome in the seam removal work and the work efficiency is also poor. In addition, in particular, a product that requires designability may not be able to be handled by the conventional punching method.

An object of the present invention is to provide a punch press punching method capable of seamlessly processing long holes in a plate material.
Another object of the present invention is to make it possible to satisfactorily perform the punching process.
Still another object of the present invention is to provide a punch press suitable for performing the punching process by the above method.

According to the punch press punching method of the present invention, a plurality of punch holes formed by punching are formed so that adjacent ones partially overlap each other, whereby a long hole longer in the plane direction than a single punch hole is formed on the plate material. A method of performing a punching process to open, a process of forming a groove along an edge of a desired long hole on at least one surface of a plate material, and the punching process while a punching die for punching is placed along the groove Process.
There is a tendency that the seam formed by the punching process tends to come out as the plate thickness increases. Therefore, as in the present invention, if a groove along the edge of a desired long hole is formed in advance and the plate thickness at the punched portion is made thin, it is difficult to produce a seam even if additional punching is performed.

In this invention, the punch die has a semicircular outer peripheral portion having a cross-sectional shape parallel to the surface of the plate material, and linear outer peripheral portions that are parallel to each other and tangential to both ends of the semicircular outer peripheral portion. It is preferable to perform the punching process while shifting the position of the punch mold relative to the plate material toward the semicircular outer peripheral side.
A mechanism for generating seams will be described. When a punch die is punched from above to open a punch hole in a plate material, sagging due to bending stress or the like occurs in the upper part of the punch hole. In the corner portion of the punch hole, the stress acting on the intersecting sides on both sides of the corner portion repels each other, thereby reducing the sagging. For this reason, when the punching process is performed, a small sagging portion left at the corner portion of the punch hole formed by the previous punching process appears as a seam.
Punch holes opened with a punch die having a cross-sectional shape having a semicircular outer periphery and a linear outer periphery have no corners at least in the vicinity of the semicircular outer periphery. There are no small parts. Therefore, if the punching die is subjected to the punching process while shifting the position of the punch die toward the semicircular outer peripheral portion relative to the plate material, no seam is generated.

  The punch press according to the present invention includes a punching means for punching a plate material, a plate material feeding means for feeding the plate material to a punch position of the punching means, an upper tool support capable of installing a plurality of upper molds, Lower tool support capable of installing a plurality of lower molds corresponding to the upper mold, and upper mold support and lower tool support upper mold and lower mold for indexing the upper mold and lower mold to the punch position A mold indexing means, and a punching means, a sheet material feeding means, and a process control means for controlling the mold indexing means are provided. At least one set of the plurality of upper molds and lower molds is a punch mold and a die mold for forming punch holes in the plate material, and at least one other group forms a groove on the surface of the plate material. A grooving tool and a grooving die. The processing control means causes the die indexing means to index the grooving tool and grooving die at the punch position, and uses the indexed grooving tool and grooving die to obtain a desired length. Groove cutting control for causing the plate material feeding means and the punching means to feed and process the plate material so as to form a groove along the edge of the hole, and the punch die and die die by the die indexing means. A plurality of punch holes are formed by indexing the punch positions and using the indexed punch dies and die dies so that adjacent ones are partially overlapped with each other while the punch dies are placed along the grooves. In order to open the sheet material, the sheet material feeding means and the punching means are caused to perform a punching process control for feeding and processing the sheet material.

  According to the configuration of this punch press, first, the grooving tool and the grooving die are indexed at the punch position, and the edge of the desired long hole is determined using the indexed grooving tool and grooving die. Next, the punch die and the die die are indexed to the punch position, and the punch die and the die die are indexed along the groove while adjoining the punch die and the die die. A plurality of punch holes are formed by partially overlapping each other. Thereby, a long hole without a seam can be processed. This overtaking process is automatically performed by controlling the punching means, the plate material feeding means, and the die indexing means by the processing control means.

  According to the punch press punching method of the present invention, a plurality of punch holes formed by punching are opened so that adjacent ones partially overlap each other, so that a long hole longer in the plane direction than a single punch hole is formed on the plate material. A method of performing a punching process to open, a process of forming a groove along an edge of a desired long hole on at least one surface of a plate material, and the punching process while a punching die for punching is placed along the groove And a process of performing the processing, it is possible to seamlessly process the long holes in the plate material.

  In the punch punching method according to the present invention, the punch mold has a semicircular outer peripheral portion parallel to the surface of the plate material and parallel to each other following the tangential direction at both ends of the semicircular outer peripheral portion. When the punching process is performed while shifting the position of the punch die toward the semicircular outer periphery side relative to the plate material, the punching process is good. Can be done.

  The punch press according to the present invention includes a punching means for punching a plate material, a plate material feeding means for feeding the plate material to a punch position of the punching means, an upper tool support capable of installing a plurality of upper molds, Lower tool support capable of installing a plurality of lower molds corresponding to the upper mold, and upper mold support and lower tool support upper mold and lower mold for indexing the upper mold and lower mold to the punch position A punch press comprising: a mold indexing means; and a punching means, a plate material feeding means, and a process control means for controlling the mold indexing means, wherein at least one of the plurality of upper molds and lower molds One set is a punch die and a die die for punching a plate material, and at least one other set is a grooving tool and a grooving die for forming a groove on the surface of the plate material, The processing control means includes the The grooving tool and the grooving die are indexed to the punch position by the mold indexing means, and the groove along the edge of the desired long hole is formed using the indexed grooving tool and grooving die. Groove control for causing the plate material feeding means and the punch processing means to feed and process the plate material, and the die indexing means to index the punch die and die die to the punch position, Using the indexed punch mold and die mold, the plate material feed is performed so that a plurality of adjacent punches are partially overlapped with each other while the punch mold is along the groove. It is suitable for performing the punching process by the above-described method because the punching means and the punching means perform the punching process control for feeding and processing the plate material.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a schematic configuration of the punch press of this embodiment, and FIG. 2 is a side view thereof. In this punch press, upper and lower turrets 2 and 3, which are upper and lower tool supports, are supported by an upper frame portion 1a and a lower frame portion 1b of a frame 1 so as to be rotatable around concentric vertical axes. . Each of these turrets 2 and 3 is provided with a plurality of upper molds and lower molds arranged in the circumferential direction. At least one set of the plurality of upper molds and lower molds is the punch mold 4 and the die mold 5, the other at least one set is the grooving tool 6 and the grooving die 7, and at least the other One set is the upper and lower burr crushing tools 20 and 21.

  The upper and lower turrets 2 and 3 are installed on the frame 1, and the desired mold is indexed to the punch position P by the mold indexing means 8. The mold indexing means 8 rotates the upper and lower turrets 2 and 3 synchronously with each other via a drive transmission system such as a chain by, for example, a common motor (not shown).

  The punch metal fitting 4, the grooving tool 6, and the upper burr crushing tool 20 are driven up and down by the ram 9 while being indexed to the punch position P. The ram 9 is supported by the upper frame portion 1a through a guide member (not shown) so as to be movable up and down, and is driven up and down by the punching means 10. The punching means 10 includes, for example, a servo motor 11 and a motion conversion mechanism 12 that converts the rotation thereof into a linear motion of the ram 9.

  The plate material W is fed back and forth and right and left on the table 14 by the plate material feeding means 13 so that the processing position is at the punch position P. The plate material feeding means 13 includes a carriage 15 that moves back and forth (Y direction) and a cross slide 16 that moves left and right (X direction), and a work holder 17 that holds an end of the plate material W is attached to the cross slide 16. It is as. The front / rear moving mechanism 23 for moving the carriage 15 in the front / rear direction and the left / right moving mechanism 24 for moving the cross slide 16 in the left / right direction are, for example, conversion mechanisms such as servomotors 23a, 24a and a ball screw for converting the rotation thereof into a linear motion. 23b, 24b and the like.

  The whole punch press, for example, the die indexing means 8, the punching means 10, and the plate material feeding means 13 is controlled by a processing control means 18 comprising a computer type numerical control device or the like. The processing control means 18 controls a punching process for making a long hole in a plate material using the punch die 4 and the die die 5 in addition to the normal punching control using the punch die 4 and the die die 5. Using the punching control, the groove cutting control 6 for cutting the groove along the edge of the long hole prior to the above punching using the groove cutting tool 6 and the groove cutting die 7, and the upper and lower burr crushing tools 20, 21 Then, burr crushing control for crushing burrs or the like of the long holes opened by the punching process is performed. These controls will be described later.

  FIG. 3 is a diagram showing grooving by the grooving tool 6 and the grooving die 7. The grooving tool 6 has a V-shaped cross-section at the tip, and the grooving die 7 has a flat upper surface. The grooving tool 6 is moved from above to the plate material W supported from below by the grooving die 7. By punching, a V-shaped groove 31 (see FIGS. 8A and 8B) is formed on the surface of the plate material W.

  Instead of forming the groove 31 by punching the grooving tool 6 as in this embodiment, while pressing a disk-shaped grooving tool having a cutting edge for grooving on the outer peripheral portion against the plate material W You may make it form the groove | channel 31 in the board | plate material W by rotating. In that case, the rotary grooving tool is used while being held at a predetermined height by the ram 9. Both punch-type and rotary-type grooving tools can be processed by the punching means 10.

  The cross-sectional shape of the groove 31 formed by the grooving tool 6 is not limited to a V shape. For example, as shown in FIGS. 9A and 9B, the wall surface of the groove 31 may be curved. However, in the case where the wall surface of the groove 31 is either flat or curved, it is preferable that the width becomes narrower toward the tip side.

  FIG. 4A is a view showing punching by the punch die 4 and the die die 5. Punch holes 32 (see FIG. 7) are opened in the plate material W by punching the plate material W supported from below by the cylindrical die die 5 with the convex punch die 4 from above. As shown in FIG. 4B, the cross-sectional shape parallel to the plate material W of the punch die 4 is a semicircular outer peripheral portion 4a and straight lines parallel to each other at both ends of the semicircular outer peripheral portion 4a. It has the shape which has the shape outer peripheral part 4b. Although not shown, the cross section of the hole 5 a of the die mold 5 has a shape corresponding to the cross section of the punch mold 4.

  FIG. 5 is a diagram showing a burr crushing process using the upper and lower burr crushing tools 20 and 21. Both the upper and lower burr crushing tools 20 and 21 are configured such that ball members 20b and 21b are rotatably supported by base portions 20a and 21a. The diameter of the ball 20b of the upper burr crushing tool 20 is larger than that of the ball member 21b of the lower burr crushing tool 21, for example, about twice.

  A method of punching a long hole by this punch press will be described with reference to the flowchart of FIG. FIG. 7 is a plan view of the long hole, and FIG. 8 is an explanatory view showing the process of the long hole punching process. First, the groove 31 along the edge of the desired long hole 30 is formed by groove cutting control as shown in FIG. In the grooving control, the grooving tool 6 and the grooving die 7 are indexed to the punching position P by the die indexing means 8 (step 1), and the indexed grooving tool 6 and the grooving die are indexed. 7 is a control for causing the plate material feeding means 13 and the punch processing means 10 to feed and process the plate material so as to form the groove 31 along the edge of the long hole 30 (step 2).

  Next, the long hole 30 is formed in the plate material W by the punching control. In the punching control, the die indexing unit 8 indexes the punch die 4 and the die die 5 to the punch position P (step 3), and the indexed punch die 4 and die die 5 are used. Then, as shown in FIG. 7, while the punch mold 4 is along the groove 31, the adjacent ones are partially overlapped with each other so as to open a plurality of punch holes 32, and the plate material feeding means 13 and the punching process. This is control for causing the means 10 to feed and process the plate (step 2). At the time of this punching process, as shown in FIG. 8B, the punch die 4 and the die die 5 are held so that their shearing action surfaces 4c and 5b pass through the deepest part of the groove 31 and Thus, punching is performed while shifting the position of the punch die 4 toward the arcuate outer peripheral portion 4a. The encircled numbers in FIG. 7 indicate the processing order of the punch holes 32.

  According to this method of additional punching, a groove 31 is formed in advance along the edge of the long hole 30, and each punch hole 32 is opened along the groove 31. The cross-sectional shape of the groove 31 is V-shaped, and stress concentrates on the deepest part of the groove 31, so that punching with the punch die 4 is performed well. Since the thickness of the plate material W is thin in the groove 31, a seam due to the additional punching of the groove 31 is difficult to occur. In addition, as described in the section for solving the problem, the seam generated in the punching process is caused by a small portion of the sag generated in the corner portion of the punch hole. Since there is no corner portion in the punch hole 32 formed by the mold 5, a small sagging portion does not occur, and the occurrence of a joint is suppressed. The cross-sectional shape of the punch die 4 of this embodiment is such that the end opposite to the semicircular outer peripheral portion 4a is a rectangular outer peripheral portion. Since the punched position is the portion of the previous punch hole 32, the punch hole 32 is not involved in the punching process.

  Next, the burr 33 generated by the punching process is removed by burr crushing control. In addition, if the seam 34 is generated, it is also removed. In the burr crushing control, the upper and lower burr crushing tools 20 and 21 are indexed to the punch position P in the mold indexing means 8 (step 5), and the burr 33 and the burr crushing tools 20 and 21 are used. In this control, the plate material feeding means 13 and the punching means 10 are fed and processed so as to crush the joint 34 (step 6). Specifically, as shown in FIG. 8 (C), the ball members 20b and 21b of the burr crushing tools 20 and 21 are pressed against the edge of the long hole 30 from above and below, and relative to the plate material W along the edge. By moving, the burr 33 and the joint 34 are crushed. In FIG. 8C, the seam 34 is shown large for the sake of clarity. However, when the punching control is performed after the grooving control, the actual seam 34 is smaller or almost absent. It is in a state. By performing this burr crushing process, the burr 33 and the seam 34 are eliminated as shown in FIG.

In this embodiment, the burr 33 and the seam 34 are crushed by the ball-shaped burr crushing tools 20 and 21, but the burr 33 and the seam 34 may be removed by other methods.
Further, when the burrs 33 and the seams 34 are not generated due to the grooving process and the follow-up process, the burr crushing process may be omitted.

It is a top view showing a schematic structure of a punch press concerning an embodiment of this invention. It is a side view which shows schematic structure of the punch press. (A) is a front view showing grooving by a grooving tool and a grooving die, and (B) is a side view thereof. (A) is a figure which shows the punch process by a punch metal mold | die and die metal mold | die, (B) is IVB-IVB sectional drawing. It is a figure which shows the burr crushing process by the upper and lower burr crushing tools. It is a flowchart which shows the additional punching method of a long hole. It is a top view which shows the shape of a long hole. It is explanatory drawing which shows the process of the additional punching process of a long hole. (A), (B) is explanatory drawing which shows the shape of a different groove | channel, respectively.

Explanation of symbols

2, 3 ... Tool support 4 ... Punch die 4a ... Semicircular outer periphery 4b ... Linear outer periphery 5 ... Die die 6 ... Grooving tool 7 ... Grooving die 8 ... Mold indexing means 10 ... Processing means 13 ... Plate material feeding means 18 ... Processing control means 20 ... Upper burr crushing tool 21 ... Lower burr crushing tool 30 ... Long hole 31 ... Groove 32 ... Punch hole 33 ... Burr 34 ... Seam W ... Plate material

Claims (3)

Punch press punching method for punching a plate with a long hole longer in the plane direction than a single punch hole by opening a plurality of punch holes by punching so that adjacent ones partially overlap each other Because
A punch press including a process of forming a groove along an edge of a desired long hole on at least one surface of a plate material, and a process of performing the punching process while placing a punch die for punching along the groove. Overtaking method.   The punch mold has a shape of a cross section parallel to the surface of the plate material having a semicircular outer peripheral portion and linear outer peripheral portions that are parallel to each other in a tangential direction at both ends of the semicircular outer peripheral portion. 2. The punch press punching method according to claim 1, wherein the punch punching is performed while the punch die is displaced relative to the plate material toward the semicircular outer peripheral side. Punching means for punching the plate material, plate material feeding means for feeding the plate material to the punch position of the punching means, an upper tool support capable of installing a plurality of upper molds, and a lower corresponding to the upper mold A lower tool support on which a plurality of molds can be installed, a mold indexing means for indexing the upper tool support and the lower tool support on the upper tool support and the lower tool support to the punch positions, and A punch press comprising a punching means, a plate material feeding means, and a processing control means for controlling a die indexing means,
At least one set of the plurality of upper molds and lower molds is a punch mold and a die mold for forming punch holes in the plate material, and at least one other group forms a groove on the surface of the plate material. A grooving tool and a grooving die for
The processing control means includes
The die indexing means causes the grooving tool and grooving die to be indexed at the punch position, and along the edge of a desired long hole using the indexed grooving tool and grooving die. Groove control for causing the plate material feeding means and the punch processing means to feed and process the plate material so as to form a groove;
The punch die and the die die are indexed to the punch position by the die indexing means, and the punch die and the die die are indexed along the groove using the indexed punch die and die die. A punching control for causing the plate material feeding means and the punch processing means to feed and process the plate material so that adjacent ones are partially overlapped with each other, and a plurality of punch holes are opened.
Punch press that is what makes you do.

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