JP6691710B2 - Chamfering method - Google Patents

Description

The present invention is, for example, through a fine connection portion such as a micro-joint about the chamfering method of the products in processed into a state of connecting the product and raw workpiece. More specifically, in performing the chamfering of the cut surface of the product, about the chamfering method capable of performing good efficiency chamfering regardless of the presence or absence of the micro joints.

  Conventionally, when performing punching or laser cutting on a plate-shaped work, the product and the material are sometimes connected to each other via a micro joint as a fine connecting portion. Further, it has been proposed to chamfer the cut surface of the product before separating the product from the work (for example, refer to Patent Document 1).

JP2012-125799A

  In the configuration described in Patent Document 1, the workpiece is subjected to laser cutting to separate the product member and the removing member, and the product member and the removing member are connected to each other by a plurality of connecting portions of about 0.5 mm. It is the structure which connected. Then, when the product member and the removing member are connected to each other via the connecting portion, chamfering of the cut surface by laser cutting is performed.

  The chamfering of the cut surface is performed by using a rotary mold in which the cross-sectional shape of the outer peripheral edge is V-shaped. That is, the chamfering process is performed by fitting the outer peripheral edges of the upper and lower rotary molds having a V-shaped cross section into the laser cutting portion and rolling them. Since the connecting portion may be broken at the portion of the connecting portion, the chamfering process is performed while avoiding the connecting portion.

  Therefore, when the number of the connecting portions is large, there are many operations for avoiding the connecting portions, and there is a problem in improving efficiency.

The present invention has been made in view of the above problems, and is a chamfering method for chamfering the product side of a slit in a work processed in a state in which a product and a material are connected to each other through a fine connection portion. A punch guide that is vertically movably supported by an upper die holder in the punch press , a stripper spring elastically mounted on the upper side of the punch guide, and a pressing roller rotatably provided at the lower end of the punch guide. Using the upper die having the lower die body supported by the lower die holder in the punch press, and the lower die having a chamfering roller rotatably provided on the lower die body, the pressing roller is used. With the product side of the slit in the work being pressed against the chamfering surface side of the chamfering roller, the upper die along the slit in the work By relatively moving the fine the lower tool, when performing the chamfering of the product side of the in the workpiece slit, the chamfer operation state sandwiched workpiece by the upper mold and the lower mold, the connecting with continuously conducted even in the portion of the section, when passing through the position where the chamfered roller corresponding to the connecting portion, you characterized in that the compression deflection of the stripper spring occurs.

  According to the present invention, since the chamfering operation by the chamfering die is continuously performed even in the portion of the fine connection portion, the operation of avoiding the connection portion is unnecessary, and the chamfering process can be efficiently performed. Is.

It is explanatory drawing which shows the state which connected the product and raw material via the wire joint and micro joint as a fine connection part. It is a section explanatory view showing composition of a chamfering metallic mold. It is a section explanatory view showing composition of a lower metallic mold in a chamfering metallic mold. It is sectional explanatory drawing which shows 2nd Embodiment of the lower metal mold | die in a chamfering metal mold. It is a section explanatory view showing a 3rd embodiment of a lower metallic mold in a chamfering metallic mold. It is sectional explanatory drawing which shows 4th Embodiment of the lower metal mold | die in a chamfering metal mold. It is sectional explanatory drawing which shows 5th Embodiment of the lower metal mold | die in a chamfering metal mold.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. For example, a plate workpiece W is finely connected by a plate processing machine such as a turret punch press (not shown) or a laser cutting machine (not shown). As a part, for example, to process the product and the raw material in a connected state via a micro joint, the process is performed as follows.

  That is, as shown in FIG. 1, when a slit 3 long in the X-axis direction and a slit 5 long in the Y-axis direction are processed to separate a product 7 and a material 9, the product 7 is removed from the material 9 during processing. The wire joints 11 are left as fine connection parts at a plurality of positions in the slits 3 and 5 so as not to be separated. The micro joints 13 are left at the positions where the slits 3 in the X-axis direction and the slits 5 in the Y-axis direction intersect with each other as fine connecting portions having a shape in which corners are connected. Depending on the shape and size of the product 7, only the wire joint 11 or only the micro joint 13 may be used as the fine connection portion.

  The portions of the wire joint 11 and the micro joint 13 are cut by a micro joint cutter described in, for example, Japanese Patent Nos. 4153348 and 4643335 after the work W is finished. By the way, when punching the slits 3 and 5 in a punch press, burrs are generated on the lower surface of the work W. Therefore, it is desirable to remove the burr generated on the product 7 when the product 7 is connected to the material 9 via the wire joint 11 and the micro joint 13.

  FIG. 2 is an explanatory diagram showing the configuration of a deburring die (chamfering die) 15 that is used by being attached to a punch press (not shown). The deburring die 15 includes an upper die 17 and a lower die 19. The upper and lower molds 17 and 19 are supported by upper and lower rotary holders 21U and 21L provided in the punch press. More specifically, the rotary holders 21U and 21L rotate synchronously and are supported by the upper and lower mold holders 23U and 23L of the punch press so as to be rotatable and indexable. Since the rotary holders 21U and 21L of this type have already been known as described in, for example, Japanese Patent Laid-Open No. 2004-268101, a detailed description of the structure of the rotary holders 21U and 21L will be given. Is omitted.

  The upper mold 17 is provided with a cylindrical punch guide 25 which is rotatable integrally with the upper rotation holder 21U and is vertically movable with respect to the upper rotation holder 21U. A punch body 27 is vertically movably fitted into the punch guide 25. A punch driver 29 extending upward from the punch body 27 penetrates a retainer collar 31 provided on the upper portion of the punch guide 25 so as to be vertically movable. A punch head 33 is screwed onto the upper end of the punch driver 29, and a stripper spring 35 is mounted between the punch head 33 and the retainer collar 31.

  An oil mist hole 37 that penetrates vertically is formed at the axial center of the punch body 27. The oil mist hole 37 can be connected to the oil mist hole 39 formed in the striker ST that is vertically movable in the punch press. The oil mist hole 37 is connected to the oil mist hole 39 and receives the supply of oil mist when the striker ST contacts the punch head 33. The oil mist hole 37 is connected to a plurality of connection holes 37A opened on the outer peripheral surface of the punch body 25.

  Therefore, the oil mist supplied into the oil mist hole 37 not only lubricates the inner peripheral surface of the punch guide 25 and the outer peripheral surface of the punch body 27, but also lubricates the pressing roller described later. ..

  At the lower end of the punch guide 25, an opening 40 is formed that opens in a direction orthogonal to the axis of the punch guide 25 (direction perpendicular to the paper surface in FIG. 2). A cylindrical pressing roller 41 is horizontally and rotatably provided in the opening 40. More specifically, by forming the opening 40, the lower end of the punch guide 25 is provided with a pair of legs 43A and 43B facing each other. The leg portions 43A, 43B are provided with inverted U-shaped notches 45A, 45B which are open to the lower end side when viewed from the side.

  Both ends of an upper roller support shaft 49 that rotatably supports the pressing roller 41 via a bearing 47 are engaged with the notches 45A and 45B. Then, a fixing ring 51 for fixing both ends of the upper roller support shaft 49 in a state of being engaged with the notches 45A and 45B is detachably attached by a fixing tool (not shown) such as a set screw. There is. Therefore, the pressing roller 41 can be attached to and detached from the punch guide 25.

  The lower mold 19 is provided so as to rotate integrally with the lower rotation holder 21L. That is, the lower mold 19 includes a cylindrical lower mold body 53 that is detachably attached to the lower rotation holder 21L. A chamfering roller 55 is horizontally and rotatably provided in the lower mold body 53.

  More specifically, the chamfering roller 55 is rotatably provided via a bearing 59 on a lower roller support shaft 57 mounted horizontally on the lower mold body 53. Both ends of the lower roller support shaft 57 are engaged with U-shaped engaging grooves 53U formed in the lower mold body 53. Then, it is detachably and replaceably attached to the lower die main body 53 with an attaching screw 61.

  On the outer peripheral surface of the chamfering roller 55, a ridge 63 is formed over the entire circumference in order to chamfer (burr) the product 7 side in the slit 3 (5) formed in the work W. A tapered chamfering surface (chamfering surface) 63F (see FIG. 3) for chamfering the lower edge of the slit 3 (5) formed in the work W is formed on both sides of the ridge 63. I am doing it. By the way, since the chamfering process is a chamfering process (0.1C to 0.5C) of about 0.1 mm to 0.5 mm, the protrusion height of the protrusions 63 of the chamfering roller 55 from the outer peripheral surface is high. The amount (projection amount) is about 0.1 mm to 0.5 mm.

  As is clear from FIG. 3, the cross-sectional shape of the ridge 63 is trapezoidal, and the width of the tip surface (outer peripheral surface of the ridge 63) of the ridge 63 at the time of the cross section is the width of the slits 3, 5. It is made smaller. In addition, at a position corresponding to the wire joint 11, the wire joint 11 is in contact with the wire joint 11 for a predetermined length in the longitudinal direction, so that the upper surface in the cross section has a substantially flat portion (horizontal portion). is doing.

  In the above structure, as shown in FIG. 1, the work W is punched with the slits 3 and 5 to separate the product 7 and the material 9. At this time, the wire joint 11 is left at an appropriate position of the slits 3 and 5, and the micro joint 13 is left at a connection portion between the slit 3 and the slit 5, so that the product 7 and the material 9 are punched. You can As described above, when the slits 3 and 5 are punched, burrs are formed on the lower edges of the product 7 and the raw material 9. Therefore, in order to omit the deburring process (burr crushing process) in the subsequent process, the deburring process (chamfering process) on the product 7 side can be performed when the material 9 and the product 7 are connected. It is desirable.

  In order to perform the deburring (chamfering) process on the product 7 side, the lower edge of the slit 3 (5) on the product 7 side of the work W corresponds to the chamfered surface 63F of the chamfering roller 55 as shown in FIG. To position. Then, the upper mold 17 is lowered, and the lower edge of the work W is pressed against the chamfered surface 63F of the chamfering roller 55 by the pressing roller 41 provided in the upper mold 17.

  As described above, when the lower edges of the slits 3 and 5 in the work W are pressed against the chamfered surface 63F of the chamfering roller 55, the lower edge is chamfered by the chamfered surface 63F of the chamfering roller 55, and the lower edge Chamfering (deburring) is performed. The lower edge of the workpiece W on the product 7 side in the slits 3, 5 is kept pressed against the chamfering surface 63F of the chamfering roller 55, and the upper and lower molds 17, 19 are relatively moved along the slits 3, 5. The chamfering process (deburring process) along the slits 3 and 5 can be performed by moving to.

  By the way, since the pressing roller 41 has a cylindrical shape and is configured to be longer than the width dimension of the slits 3 and 5, the pressing roller 41 is in a state of straddling the slits 3 and 5 as shown in FIG. Therefore, the work W is pressed. At this time, the pressing roller 41 is in line contact with the upper surface of the work W.

  As described above, when the upper and lower molds 17 and 19 are moved along the slits 3 and 5 of the work W, the chamfering roller 55 of the lower mold 19 passes through the position corresponding to the wire joint 11. .. At this time, the wire joint 11 rides on the protrusion 63 of the chamfering roller 55. Then, the work W is slightly raised. As described above, when the work W is slightly raised, the stripper spring 35 in the upper die 17 is slightly compressed and bent. That is, the pressing roller 41 in the upper mold 17 maintains the state where the upper surface of the work W is always pressed.

  As described above, when the wire joint 11 rides on the ridge 63 of the chamfering roller 55, the product 7 side of the work W is slightly raised and the material 9 side is held in a fixed position. Therefore, the wire joint 11 connecting the product 7 and the material 9 is inclined and deformed so that the product 7 side is slightly higher. That is, although the pulling force from the material 9 side to the product 7 side acts on the wire joint 11, the pulling force near the central portion of the wire joint 11 in the opposite direction to the product 7 side and the material 9 side does not act. .. Therefore, the wire joint 11 is held without breaking.

  Therefore, when deburring the cut surfaces in the slits 3 and 5 where the wire joint 11 is present, without performing the operation of avoiding the wire joint 11 (the operation of moving the upper die 17 up and down). The chamfering process can be continuously performed. In other words, the chamfering operation with the work W sandwiched between the upper and lower molds 17 and 19 can be continuously performed, and the efficiency of the chamfering process can be improved.

  By the way, at the position where the slit 3 and the slit 5 intersect, that is, at the position where the product 7 and the material 9 are connected by the micro joint 13, the upper and lower rotary holders 21U and 21L provided for the punch press are rotated by 90 °. , Corresponding to the direction of the slits 3 and 5 in the next traveling direction. Therefore, chamfering can be continuously performed without breaking the micro joint 13.

  By the way, as described above, the pressing roller 41 is attachable to and detachable from the upper mold 17. The chamfering roller 55 can be attached to and detached from the lower mold 19. Therefore, the combination of the pressing roller 41 and the chamfering roller 55 can be various combinations as shown in FIGS. 4 to 7, for example. In addition, in FIGS. 4 to 7, components having the same functions are denoted by the same reference numerals, and duplicate description will be omitted.

  FIG. 4 shows a case where the projections 63A of the chamfering roller 55 have a triangular cross-sectional shape, and FIG. 5 shows a case where the projections 63B of the chamfering roller 55 have a circular (semi-arcuate) cross-sectional shape. It is shown. FIG. 6 shows a case where the lower mold 19 shown in FIG. 5 is used and the pressing roller 41A in the upper mold 17 is formed into a steel ball. Also in the above configuration, the same effect as that of the above-described embodiment can be obtained. According to the above configuration, the cutting edge (edge) on the lower side of the cutting surface of the product 7 can be chamfered.

  FIG. 7 shows a configuration in which the lower die 19 shown in FIG. 4 is used, and the pressing roller 41B in the upper die 17 is provided with a ridge 63C having the same shape as the ridge 63A of the chamfering roller 55 in the lower die 19. It is what According to this structure, chamfering can be performed simultaneously above and below the cut surface of the product 7.

3 Slit 5 Slit 7 Product 9 Material 11 Wire joint 13 Micro joint 15 Deburring mold (Chamfering mold)
17 Upper Die 19 Lower Die 25 Punch Guide 27 Punch Body 33 Punch Head 35 Stripper Spring 39 Opening 41 Pressing Roller 49 Upper Roller Support Shaft 53 Lower Die Main Body 55 Chamfering Roller 57 Lower Roller Support Shaft 63 Protrusion

Claims (4)

A chamfering method for chamfering the product side of a slit in a work processed in a state where a product and a material are connected to each other through a fine connection part,
The punch press has a punch guide movably supported by an upper die holder, a stripper spring elastically mounted above the punch guide, and a pressing roller rotatably provided at a lower end of the punch guide. An upper die, a lower die body supported by a lower die holder in the punch press, and a lower die having a chamfering roller rotatably provided on the lower die body are used.
By relatively moving the upper mold and the lower mold along the slit in the work in a state where the product side of the slit in the work is pressed against the chamfered surface of the chamfering roller by the pressing roller. When performing the chamfering process on the product side of the slit in the work, the chamfering operation in a state where the work is sandwiched by the upper mold and the lower mold is continuously performed also in the connecting portion ,
The chamfering method is characterized in that when the chamfering roller passes through a position corresponding to the connecting portion, the flexure of the stripper spring occurs . The chamfering method according to claim 1, wherein a ridge is formed on the outer peripheral surface of the chamfering roller over the entire circumference in order to chamfer the product side of the slit in the work . The chamfering method according to claim 2, wherein the cross-sectional shape of the protrusion is trapezoidal, triangular, or circular. When the chamfered roller passes the position corresponding to the wire joint as the connecting portion, claim 1, wherein the compression deflection occurs Rukoto of the stripper spring to any one of claims 3 The chamfering method described .

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