JP5844683B2 - Punch mold and method for performing nibbling - Google Patents

Description

  The present invention relates to a method for performing nibbling on a workpiece of a plate-like workpiece.

  A general punch mold will be briefly described as follows.

  That is, the punch die is held by a punch die holding member in a punch press and includes a cylindrical punch guide. Further, the punch guide has a stripper portion that presses the periphery of the processed portion of the plate-like workpiece on the lower side, and an insertion hole is formed in the stripper portion.

  A punch body is provided in the punch guide so as to be movable in the vertical direction, and the punch body has a blade portion that can be inserted into the insertion hole on the lower side. The blade portion of the punch body can enter a die hole of a die mold held by a die mold holding member in the punch press. A punch head is provided at an upper end portion of the punch body, and a stripper spring capable of biasing the punch body is provided below the punch head.

  Further, the punch die includes one rotation restricting means for restricting the rotation of the punch body with respect to the punch guide, and the rotation restricting means is formed to extend vertically on the punch guide. The key groove and a key provided in the punch body and fitted in the key groove so as to be movable in the vertical direction.

  Therefore, the workpiece is moved in the horizontal direction, and the workpiece is positioned at the processing position of the punch press. Then, the ram in the punch press is moved downward, and the punch head is struck from above to move the entire punch die downward, and the workpiece is moved by the stripper portion of the punch guide. Press around the part to be processed. Further, by moving the ram downward, the punch body is moved downward relative to the punch guide against the urging force of the stripper spring, and the blade portion of the punch body is moved. Is inserted through the insertion hole. As a result, the punching die and the die die can cooperate with each other to perform a punching process on the work portion of the work to form a work hole in the work. After the ram is moved downward, the ram is moved upward to return to the original position.

  When performing nibbling on the workpiece, first, as described above, the machining hole is formed in the workpiece. Then, the ram is repeatedly moved up and down while moving the workpiece slightly in the horizontal direction. Accordingly, the punch mold and the die mold can be continuously cooperated many times to form a slit or notch having a predetermined shape in the workpiece.

  In addition, there exists a thing shown to patent document 1 as a prior art relevant to this invention.

JP-A-8-281348

By the way , when the punch die and the die die are continuously cooperated many times to perform a nibbling process on the workpiece, a backlash is caused between the punch body and the punch guide, There is a problem that a step or the like is generated on the punched surface (cut surface) of the workpiece, and the processing accuracy of the workpiece may be deteriorated.

In the first aspect of the present invention, the punch die holding member in the punch press is held so as to be movable in the vertical direction, and has a stripper portion that presses the periphery of the workpiece on the lower side. a punch guide tubular which insertion holes are formed in said stripper unit,
A punch body having directionality provided in the punch guide so as to be movable in the vertical direction and having a blade portion which can be inserted into the insertion hole on the lower side,
A punch head provided at the upper end of the punch body;
A stripper spring provided on the lower side of the punch head and capable of biasing the punch body ,
First rotation restricting means and second rotation restricting means for restricting rotation of the punch body with respect to the punch guide are provided, and the first rotation restricting means and the second rotation restricting means are nibbled with respect to the workpiece. So that the punch body can be prevented from being displaced in the circumferential direction around one of the first rotation restricting means and the second rotation restricting means. It is configured to be symmetrical relationship around the heart, the punch guide or a key groove which is formed so as to extend vertically to said punch body, the punch body or detachably attached to said punch guide and said key groove And a key fitted so as to be movable in the vertical direction.
In the invention according to claim 2, in the method for performing nibbling on the workpiece of the plate-like workpiece using the punch die according to claim 1,
With the punch die held in the punch die holding member and the die die held in advance in the die die holding member in the punch press, the ram in the punch press is moved downward, By pressing the punch head from above, the whole punch die is moved downward, the stripper part of the punch guide presses the periphery of the work part, and the ram is lowered. By moving in the direction, the punch body is moved downward relative to the punch guide while resisting the biasing force of the stripper spring, and the blade portion of the punch body is inserted into the insertion hole. By making the punch mold and the die mold cooperate, the workpiece is punched into the workpiece, and the workpiece The machined hole formed,
After forming the machining hole in the workpiece, the punch die and the die die are continuously moved many times by moving the ram repeatedly in the vertical direction while moving the workpiece slightly in the horizontal direction. A slit having a predetermined shape is formed in the workpiece in cooperation with each other.

According to the invention specific matter of claim 1 or claim 2 , the punch die includes the first rotation restricting means and the second rotation restricting means for restricting the rotation of the punch body with respect to the punch guide. and for that, we maintain the direction of the punch body with high precision

Since the first rotation restricting means and the second rotation restricting means are configured to have a symmetrical relationship with respect to the axis of the punch guide, the punch body is circumferential with respect to one of the rotation restricting means. Even if there is a tendency to be displaced, the displacement can be suppressed.

According to the invention described in claim 1 or claim 2, wherein for the direction of the punch body can be maintained with high accuracy, a number of times to continuously cooperate with the die mold and the punch tool, the When performing a nibbling process on a workpiece, the backlash between the punch body and the punch guide is suppressed, and there are almost no steps on the punched surface (cut surface) of the workpiece, thereby improving the machining accuracy of the workpiece. Can be increased.

In particular, since the punch body around the one of the rotation restricting means also tended to displace in the circumferential direction, can be the other of the rotation restricting means for inhibiting the displacement, the said punch body punch guide Can be further suppressed, and the machining accuracy of the workpiece can be further increased.

It is sectional drawing of the punch metal mold | die concerning embodiment of this invention, Comprising: The die metal mold | die is also illustrated. It is the figure along the II-II line in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

  Here, FIG. 1 is a cross-sectional view of a punch die according to an embodiment of the present invention, and FIG. 2 is a view taken along line II-II in FIG.

  As shown in FIGS. 1 and 2, a punch die 1 according to an embodiment of the present invention is used when punching a workpiece of a plate-like workpiece W, and is used in a punch press. The specific configuration of the punch die 1 that is held by the holding member 3 is as follows.

  That is, the punch die 1 is provided with a cylindrical punch guide 5. The punch guide 5 is vertically moved with respect to the punch die holding member 3 by a plurality of (only one shown) lifter springs 7 (see FIG. 1 is held so as to be movable in the vertical direction and in FIG. The punch guide 5 has a stripper plate (stripper part) 9 on the lower side, and an insertion hole 9 h is formed in the stripper plate 9.

A punch body 11 is provided in the punch guide 5 so as to be movable in the vertical direction. Here, the punch body 11 includes a body main body 13 provided in the punch guide 5 so as to be movable in the vertical direction, a body cap 15 provided by being screwed onto the upper portion of the body main body 13 , and the body main body 13 . It consists of a punch blade (blade part) 19 detachably provided on the lower surface by mounting bolts 17. The punch blade 19 can enter the die hole 23h of the die mold 23 held by the die mold holding member 21 in the punch press.

  A punch head 25 is provided at the upper end of the body cap 15, and a stripper spring 27 capable of biasing the punch body 11 is provided below the punch head 25. The urging force of the stripper spring 27 is larger than the urging force of the plurality of lifter springs 7. A protective sleeve 29 surrounding the outer periphery of the stripper spring 27 is provided at the upper end of the punch guide 5.

  Further, the punch die 1 includes a first rotation restricting means 31 and a second rotation restricting means 33 for restricting the rotation of the punch body 11 with respect to the punch guide 5, and the first rotation restricting means 31 and the second rotation restricting means 33. The restricting means 33 is configured to have a symmetric relationship with respect to the axial center of the punch body 11.

  Specifically, the punch guide 5 is formed with a first key groove 35 that constitutes a part of the first rotation restricting means 31 so as to extend in the vertical direction. A first key 37 fitted to the one key groove 35 so as to be movable in the vertical direction is detachably provided via a mounting bolt 39. Instead of the punch guide 5, the first key groove 35 may be formed on the outer peripheral portion of the body main body 13, and the first key 37 may be provided on the punch guide 5 instead of the outer peripheral portion of the body main body 13. .

  The punch guide 5 is formed with a second key groove 41 that forms a part of the second rotation restricting means 33 so as to extend in the vertical direction. In other words, the first key groove 35 is symmetrical with respect to the axis of the punch guide 5. Further, a second key 43 fitted to the second key groove 41 so as to be movable in the vertical direction is detachably provided on the outer peripheral portion of the body main body 13 via a mounting bolt 45. Is symmetrical with the first key 37 about the axis of the punch body 11. Instead of the punch guide 5, the second key groove 41 may be formed on the outer peripheral portion of the body main body 13, and the second key 43 may be provided on the punch guide 5 instead of the outer peripheral portion of the body main body 13.

  Next, a method for performing the nibbling process according to the embodiment of the present invention will be described.

  With the punch mold 1 held in the punch mold holding member 3 and the die mold 23 held in the die mold holding member 25 in advance, the workpiece W is moved in the horizontal direction so that the workpiece W is punched. Position at the processing position of the press. Then, by moving a ram (not shown) in the punch press downward and hitting the punch head 25 from above, the entire punch die 1 is lowered against the urging force of the plurality of lifter springs 7. The workpiece W is moved around the workpiece W by the stripper plate 9 of the punch guide 5. Further, by moving the ram downward, the punch body 11 is moved downward relative to the punch guide 5 against the urging force of the stripper spring 27, and the punch blade 19 of the punch body 11 is moved. Is inserted through the insertion hole 9h. As a result, the punch die 1 and the die die 23 cooperate to perform punching on the work portion of the work W, thereby forming a work hole in the work W. After the ram is moved downward, the ram is moved upward to return to the original position.

  When performing nibbling on the workpiece W, first, a machining hole is formed in the workpiece W as described above. Then, the ram is repeatedly moved up and down while moving the workpiece W slightly in the horizontal direction. As a result, the punch mold 1 and the die mold 23 can be continuously cooperated many times to form slits or notches having a predetermined shape on the workpiece W.

Here, since the punch die 1 includes two rotation restricting means (first rotation restricting means 31 and second rotation restricting means 33) for restricting the rotation of the punch body 11 with respect to the punch guide 5, the punch body 11 directions can be maintained with high accuracy. Further, since the first rotation restricting means 31 and the second rotation restricting means 33 are configured to have a symmetrical relationship with respect to the axis of the punch body 11, the first rotation restricting means 31 (or the second rotation restricting means). 33) Even if the punch body 11 tends to be displaced in the circumferential direction as a center, the displacement can be suppressed.

According to an embodiment of the above-mentioned, the present invention, it is possible to maintain the direction of the punch body 11 with high precision, and a number of times to continuously cooperate with the punch 1 and the die tool 23, the workpiece W On the other hand, when performing the nibbling process, the backlash between the punch body 11 and the punch guide 5 is suppressed, and there is almost no step on the punched surface (cut surface) of the work W, thereby improving the work accuracy of the work W. Can do.

In particular, even if the punch body 11 tends to be displaced in the circumferential direction around the first rotation restricting means 31 ( or the second rotation restricting means 33 ) , the second rotation restricting means 33 (or the first rotation restricting means 31). However, the displacement between the punch body 11 and the punch guide 5 can be further suppressed, and the processing accuracy of the workpiece W can be further increased.

  In addition, this invention is not restricted to description of the above-mentioned embodiment, It can implement in a various other aspect by making an appropriate change.

1 Punch Die 3 Punch Die Holding Member 5 Punch Guide 9 Stripper Plate (Stripper Part)
9h Insertion hole 11 Punch body 19 Punch blade (blade part)
21 Die mold holding member
23 Die mold 23h Die hole 25 Punch head 27 Stripper spring 31 First rotation restricting means 33 Second rotation restricting means 35 First key groove 37 First key 41 Second key groove 43 Second key

Claims (2)

A cylinder that is held so as to be movable in the vertical direction with respect to a punch die holding member in a punch press, has a stripper portion that presses the periphery of the workpiece to be processed , and has an insertion hole formed in the stripper portion Shaped punch guide,
A punch body having directionality provided in the punch guide so as to be movable in the vertical direction and having a blade portion which can be inserted into the insertion hole on the lower side,
A punch head provided at the upper end of the punch body;
A stripper spring provided on the lower side of the punch head and capable of biasing the punch body ,
First rotation restricting means and second rotation restricting means for restricting rotation of the punch body with respect to the punch guide are provided, and the first rotation restricting means and the second rotation restricting means are nibbled with respect to the workpiece. So that the punch body can be prevented from being displaced in the circumferential direction around one of the first rotation restricting means and the second rotation restricting means. It is configured to be symmetrical relationship around the heart, the punch guide or a key groove which is formed so as to extend vertically to said punch body, the punch body or detachably attached to said punch guide and said key groove A punch die characterized by comprising a key fitted to each other so as to be movable in the vertical direction. In the method for performing a nibbling process on a processed part of a plate-like workpiece using the punch die according to claim 1,
With the punch die held in the punch die holding member and the die die held in advance in the die die holding member in the punch press, the ram in the punch press is moved downward, By pressing the punch head from above, the whole punch die is moved downward, the stripper part of the punch guide presses the periphery of the work part, and the ram is lowered. By moving in the direction, the punch body is moved downward relative to the punch guide while resisting the biasing force of the stripper spring, and the blade portion of the punch body is inserted into the insertion hole. By making the punch mold and the die mold cooperate, the workpiece is punched into the workpiece, and the workpiece The machined hole formed,
After forming the machining hole in the workpiece, the punch die and the die die are continuously moved many times by moving the ram repeatedly in the vertical direction while moving the workpiece slightly in the horizontal direction. A method for performing a nibbling process, wherein a slit having a predetermined shape is formed in the workpiece in cooperation.

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