JP2009269092A - Sheet-like workpiece cutting method and sheet-like workpiece cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece cutting method and a workpiece cutting device capable of cutting a workpiece without providing a curved deformation to the cut section of the workpiece and without allowing burrs to be produced on the surface of a product. <P>SOLUTION: An upper blade 9 engaged between a pair of lower blades 5 installed parallel to each other on a workpiece support base 3 for supporting the sheet-like workpiece W so as to be movable in the vertical direction includes a cut surface 11 tilted at acute angle to the lower blade 5. In the cutting method, the workpiece W is cut by the lower blades 5 and the upper blade 9. The upper blade 9 is engaged and held between the lower blades 5 on the workpiece support base 3. The workpiece W is relatively fed to the cross section between the lower blade 5 and the cut surface 11 of the upper blade 9 to cut the workpiece while continuously producing scraps having a thickness equal to that of the upper blade 9 or the scraps having a width dimension smaller than the thickness of the upper blade. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for cutting a sheet-like workpiece such as a metal plate, and more specifically, a sheet-like workpiece capable of smoothly cutting a cut surface without causing a cut seam on the cut surface of the workpiece. The present invention relates to a cutting method and apparatus.

  Conventionally, when a thin metal plate is cut (sheared) by a cutting machine having an upper blade and a lower blade, a shearing machine is generally used. In a shearing machine, since the upper blade and lower blade longer than the width dimension of the plate-shaped workpiece | work made into shearing object are required, there exists a problem that it becomes large. Therefore, in order to reduce the size, a configuration has been proposed in which a V-shaped blade is cut relative to the workpiece to cut the workpiece (see Patent Document 1).

  Further, as a configuration for cutting a plate-shaped workpiece, for example, a punch press such as a turret punch press is used. When a workpiece is cut by a punch press, nibbling or additional cutting using punches and dies as upper and lower molds is performed. In the case of nibbling and additional cutting, the workpiece is cut progressively each time the punch is moved up and down with respect to the die. There is a problem that it is difficult to get.

Therefore, it has been proposed that the punch and die as upper and lower molds are each provided with a rotary blade so as to be rotatable, and the workpiece is continuously cut by feeding the workpiece to the upper and lower rotary blades (for example, (See Patent Documents 2 and 3).
JP-A-6-55332 JP-A-9-29352 Japanese Patent Laid-Open No. 9-52129

  In the blade according to the first embodiment described in Patent Document 1, the upper blade and the lower blade of the double-blade configuration are combined in a V shape, and this V-shaped portion is fed relative to the plate-shaped workpiece. The workpiece is cut by the upper blade and the lower blade. According to the above configuration, the upper blade and the lower blade provided in the blade are both blades, and the workpiece can be cut without generating scrap, but the workpiece is cut by the upper blade and the lower blade of the blade. When the workpiece always acts on the bottom where the upper and lower blades form a V-shape, the workpiece is severely worn, and when the workpiece is cut, the blade is fed to push the workpiece apart. Therefore, there is a problem that the cut surfaces of the workpiece are pressed and deformed in directions away from each other.

  Further, the blade according to the second example of Patent Document 1 is formed in a V shape by combining an upper blade and a lower blade. When the workpiece is cut by this blade, there is a problem that one of the cut workpieces is bent upward along the lower blade and the other of the workpieces is bent downward along the upper blade. There is a problem in that the curving direction of the opposite side edges and the direction of occurrence of burrs in the products cut and separated from each other are reversed.

  Further, when the workpiece is cut from one direction using the cutting dies described in Patent Documents 2 and 3, there is the same problem as in Patent Document 1.

  The present invention has been made in view of the conventional problems as described above, and an upper blade engaged in a vertically movable manner between a pair of lower blades provided in parallel with a work support base for supporting a sheet-like work, A cutting method comprising a cutting surface inclined at an acute angle with respect to the lower blade, wherein the lower blade and the upper blade cut a workpiece, and the upper blade is engaged between the lower blades of the workpiece support base. The workpiece is fed relatively to the intersection of the lower blade and the cutting surface of the upper blade, and scrap equal to the thickness of the upper blade or scrap having a width smaller than the thickness of the upper blade is continued. The workpiece is cut while being generated automatically.

  Also, a pair of lower blades provided in parallel to a workpiece support for supporting a sheet-like workpiece, and an upper portion having a cutting surface that is engageable between the pair of lower blades and is inclined at an acute angle with respect to the lower blade. A blade, and a workpiece moving means for relatively feeding the workpiece to an intersection of the lower blade of the workpiece support and the cut surface of the upper blade.

  In the sheet-like workpiece cutting device, the lower end portion of the upper blade is formed at an acute angle through which the workpiece can be cut and penetrated.

  In the sheet-like workpiece cutting device, a scrap cutting portion capable of cutting scrap is provided on the upper side of the cutting surface inclined in the upper blade.

  Further, the sheet-like workpiece cutting device includes a plate pressing means for pressing the workpiece against the upper surface of the workpiece support base.

  In the sheet-like workpiece cutting device, an angle formed by the lower blade of the workpiece support and the cut surface of the upper blade is 20 ° to 40 °.

  According to the present invention, when cutting a plate-like workpiece, continuous scrap is generated in the downward direction, so that the direction of occurrence of burrs on the product is always the lower surface. Further, since the scrap is continuously generated, there is no seam on the cut surface of the workpiece, and the conventional problems as described above can be solved.

  Referring to FIG. 1, a sheet-like workpiece cutting device 1 according to an embodiment of the present invention includes a workpiece support base 3 that supports a sheet-like workpiece W as conceptually and schematically shown. A pair of lower blades 5 are provided in parallel with each other at a portion where the work support 3 supports the lower surface of the work W. Above the pair of lower blades 5, work pressing means (plate pressing means) 7 that can press the work W against the upper surface of the lower blade 5 is provided.

  The workpiece cutting device 1 is provided with an upper blade 9 that can be engaged between the pair of lower blades 5 and can move up and down. The upper blade 9 is formed with a cutting surface 11 having an acute inclination angle α with the lower blade 5 provided on the work support 3. Further, when the upper blade 9 is engaged between the pair of lower blades 5, the workpiece cutting device 1 moves the workpiece W to the intersection of the lower blade 5 and the cutting surface 11 of the upper blade 9. Is provided with a workpiece moving means 13 for relatively feeding.

  In order to cut the sheet-like workpiece W in the above configuration, the workpiece cutting device 1 is mounted on an appropriate press (not shown) such as a punch press. That is, the work support 3 is mounted on a lower holder (not shown) provided for the press. Then, the upper blade 9 is mounted on an upper mold holder (not shown) provided on the upper side of the lower mold holder so as to be movable up and down, and the work pressing means 7 is mounted so as to be movable up and down.

  The work pressing means 7 suppresses the work W from being slightly curved upward from the upper surface of the work support 3 when the work W is cut, and moves the work W relative to the work support 3. When doing so, the workpiece W is lightly pressed so that the movement of the workpiece W is possible. Note that the work pressing means 7 is not always necessary, and may be omitted depending on circumstances. Further, when the upper blade 9 is configured to be movable relative to the lower blade 5 in the horizontal direction, the workpiece pressing means 7 presses and fixes the workpiece W against the workpiece support 3 in a stationary state. It is also possible. Further, the work pressing means 7 and the upper blade 9 may be configured to be movable integrally with respect to the lower blade 5.

  With the above configuration, when the upper blade 9 is engaged between the pair of lower blades 5, the workpiece W is relatively moved by the workpiece moving means 13 to the intersection of the lower blade 5 and the cut surface 11 of the upper blade 9. When the workpiece is fed, the portion of the upper blade 9 of the workpiece W corresponding to the cut surface 11 is moved downward along the cut surface 11, and the pair of lower blade 5 and upper blade 9 is moved. The work W is cut in between. When the workpiece W is cut in this way, as shown in FIG. 2, scrap S having a width dimension equal to the thickness of the upper blade 9 is generated, and a downward burr is formed at the lower edge of the cut surface of the workpiece W. Will result.

  That is, upward burrs are generated on both sides of the scrap S, and downward burrs are generated on the cut surface of the workpiece W. Therefore, the direction of occurrence of burrs in a product cut and separated from the workpiece W is always constant. Since there is no burr on the surface of the product, it is possible to improve the quality of the product and the burr always occurs on the back side of the product, so that burr processing can be easily performed. It is.

  In the above configuration, when the relationship between the inclination angle α of the cutting surface 11 in the upper blade 9 and the cutting accuracy of the cutting surface in the workpiece W was experimentally investigated, the results shown in FIGS. 3A and 3B were obtained. . That is, SPCC having a thickness t = 0.75 mm is used as the workpiece W, the clearance on one side between the lower blade 5 and the upper blade 9 is 0.1 mm, and the relative feeding speed of the workpiece W with respect to the upper blade 9 is 170 mm / min. FIG. 3A shows the relationship between the surface roughness Ra and the horizontal inclination angle α of the cut surface 11 when the lengthwise roughness of the cut surface of the workpiece W is measured and averaged. It was as follows. And the relationship between the height dimension of the burr | flash which generate | occur | produced in the cutting edge of the workpiece | work W, and inclination | tilt angle (alpha) was as showing in FIG.3 (b).

  From the result of FIG. 3A, the inclination angle α is preferably in the range of 20 ° to 40 °, and from the result of FIG. 3B, the inclination angle α is preferably in the range of 10 ° to 40 °. . Therefore, in consideration of the surface roughness and the height of the burr, the inclination angle α of the cut surface 11 in the upper blade 9 is desirably in the range of 20 ° to 40 °.

  FIG. 4A shows an upper blade 9A that can form slots or slits in the workpiece W. FIG. The upper blade 9A is configured such that the lower end portion 15 is formed at an acute angle so that the workpiece W can be penetrated from above. A scrap cutting part 17 is provided above the cutting surface 11 of the upper blade 9A. A downward projecting end (lower end) 19 of the scrap cutting portion 17 is positioned higher than the lower end 15 and is formed at an acute angle so that the workpiece W can be cut and penetrated. is there. The scrap cutting unit 17 only needs to be able to cut and separate scrap from the workpiece W, and can be configured as a substantially horizontal cutting blade as shown in FIG.

  With the above configuration, the lower end 15A of the upper blade 9A is pierced into the workpiece W from above and engaged between the pair of lower blades 5. Thereafter, when the workpiece W is fed relative to the cutting surface 11 of the upper blade 9A, the workpiece W is cut as described above. After the workpiece W has been cut for an appropriate length, the upper blade 9A is further lowered and the workpiece W is cut by the scrap cutting unit 17. The scrap S generated at the time of cutting the workpiece W is cut and separated from the workpiece W. Will be. That is, the slot or slit is processed over an appropriate range of the workpiece W.

  FIG. 5 shows a configuration in the case where a workpiece cutting device is applied to a punch and a die that are mounted on a rotary die that can be horizontally rotated in a punch press such as a turret punch press. That is, a turret punch press as an example of a punch press includes an upper turret 21 as an example of an upper die support means, as is well known, and a punch die as an upper die is attached to and detached from the upper turret 21. An upper mold holder 23 that is exchangeable and can be moved up and down is rotatably provided. A lower turret 25 as an example of a lower mold support means is provided, and a lower mold holder 27 for rotatably supporting a die mold as a lower mold is attached to the lower turret 25 so as to be rotatable. It has been. As described above, since a punch press such as a turret punch press provided with the upper mold holder 23 and the lower mold holder 27 so as to be rotatable is already known or publicly known, the description of the details of the punch press is omitted.

  A punch die 29 supported by the upper die holder 23 so as to be movable up and down is provided with a cylindrical punch guide 31 as in a general punch die. Like the upper blade 9A, a punch blade portion 35 having a cutting surface 11, a lower end portion 15, a scrap cutting portion 17, and a protruding end portion 19 is provided at the lower portion of the punch body 33 that is movably fitted. Yes. Further, at the lower part of the punch guide 31, a rotating means such as a roller or a ball or a sliding means as a work pressing means capable of pressing the work W against the upper surface of the die mold 37 mounted on the lower mold holder 27. A plurality of sliding pressing means 39 are provided.

  The die die 37 corresponds to the workpiece support 3 for supporting the workpiece W, and a pair of die blade portions 41 corresponding to the lower blade 5 are provided in parallel on the die die 37 in parallel. I have. A scrap guide surface 43 for guiding the scrap S generated at the time of cutting the workpiece W toward the upper surface of the die die 37 is formed at the bottom of a part of the groove between the pair of die blade portions 41. It is.

  With the above configuration, when the punch die 29 is lowered by a ram (not shown) provided in the punch press so as to be movable up and down, the sliding pressing means 39 provided in the punch guide 31 presses the workpiece W against the upper surface of the die die 37. At the same time, the lower end portion 15 provided in the punch blade portion 35 and a part of the cutting surface 11 are engaged between the pair of die blade portions 41 provided in the die die 37. In this way, the workpiece W is held by the workpiece moving means 45 such as a workpiece clamp which is held in a state where the punch blade portion 35 is engaged between the die blade portions 41 and is movable in the X and Y axis directions on the punch press. When the cutting surface 11 is fed, the scrap S is generated and the workpiece W is cut in the same manner as described above.

  As described above, the scrap S generated by cutting the workpiece W is guided toward the upper surface of the die die 37 along the scrap guide surface 43 provided in the die die 37, and the slit formed by cutting the workpiece W. Be guided in. As described above, when the workpiece W is cut by the cooperation of the punch die 29 and the die die 37, the upper die holder 23 and the lower die holder 27 are synchronously rotated in the same direction. When the workpiece moving means 45 is moved in the X and Y axis directions to feed the workpiece W, a curved slit SL can be appropriately formed on the workpiece W as shown in FIG.

  By the way, in the above description, the case where the workpiece W to be cut is a sheet-like workpiece has been described. However, when the workpiece is a pipe P as shown in FIG. 7, a mandrel 49 provided with a pair of lower blades 47 in parallel is fitted into the pipe P. The upper blade 9 is held in an engaged state between the pair of lower blades 47 in the mandrel 49, and the pipe P is moved in the longitudinal direction relative to the upper blade 9 and the mandrel 49, thereby Slots or slits parallel to the axis can be processed in P.

  By the way, the present invention is not limited to the above-described embodiments, and can be implemented in other forms by making appropriate changes. For example, it is possible to apply a fine vibration in the vertical direction to the upper blade 9 so that the vibration energy contributes to cutting. Further, when cutting the workpiece W, it is also possible to perform trimming by positioning the edge portion of the workpiece W between the pair of lower blades 5. Further, it is possible to extend the life of the upper blade 9 by adjusting the height position of the upper blade 9 and changing the position of the cutting surface 11 for cutting the workpiece W.

It is explanatory drawing which showed notionally and schematically the structure of the workpiece | work cutting device which concerns on embodiment of this invention. It is explanatory drawing which shows the cutting state of the workpiece | work by the said workpiece | work cutting device. It is explanatory drawing which showed the relationship between the inclination angle of the cut surface in an upper blade, the roughness of a cut surface, and the height of a burr | flash. It is explanatory drawing which shows the 2nd form of an upper blade. It is explanatory drawing at the time of applying a workpiece | work cutting device to a punch metal mold | die and die metal mold | die. It is explanatory drawing which shows the example of a process of the slot or slit with respect to a workpiece | work. It is explanatory drawing at the time of applying a workpiece | work cutting device to a pipe cutting device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet | seat workpiece cutting device 3 Work support stand 5 Lower blade 7 Work holding means (plate holding means)
DESCRIPTION OF SYMBOLS 9 Upper blade 11 Cutting surface 13 Work moving means 15 Lower end part 17 Scrap cutting part 19 Protruding end part 29 Punch die 35 Punch blade part 37 Die die 39 Sliding pressing means 41 Die blade part 43 Scrap guide surface 45 Work moving means

Claims (6)

  An upper blade engaged in a vertically movable manner between a pair of lower blades provided in parallel to a workpiece support that supports a sheet-like workpiece, and having a cutting surface inclined at an acute angle with respect to the lower blade, and the lower blade And a cutting method of cutting a workpiece with an upper blade, wherein the upper blade is held in an engaged state between the lower blades of the workpiece support base, and the cutting surface of the lower blade and the upper blade is cut. A sheet-like workpiece characterized by feeding a workpiece relatively to an intersection and cutting the workpiece while continuously generating scrap equal to the thickness of the upper blade or scrap having a width smaller than the thickness of the upper blade. Cutting method.   A pair of lower blades provided in parallel to a workpiece support for supporting a sheet-like workpiece; an upper blade having a cutting surface that is engageable between the pair of lower blades and is inclined at an acute angle with respect to the lower blade; And a workpiece moving means for relatively feeding the workpiece to the intersection of the lower blade of the workpiece support and the cut surface of the upper blade.   The sheet-like workpiece cutting device according to claim 2, wherein a lower end portion of the upper blade is formed at an acute angle through which the workpiece can be cut and penetrated.   The sheet-like workpiece cutting device according to claim 3, further comprising a scrap cutting portion capable of cutting scrap on an upper side of the cutting surface inclined on the upper blade.   The sheet-like workpiece cutting device according to claim 2, 3 or 4, further comprising plate pressing means for pressing the workpiece against the upper surface of the workpiece support base.   The sheet-like workpiece cutting device according to any one of claims 2 to 5, wherein an angle formed between a lower blade of the workpiece support base and a cut surface of the upper blade is 20 ° to 40 °. Sheet workpiece cutting device.

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