JP4996293B2 - Punch mold and key - Google Patents

Description

  The present invention relates to a punch die that is used by being mounted on a punch press such as a turret punch press and a key used for the punch die, and more particularly, a side pressure acts on the punch body during punching. The present invention also relates to a punch die that can suppress the displacement of the punch body with respect to the punch driver.

As a punch die that is used by attaching to a punch press such as a turret punch press, a punch body having a punch blade portion at the lower end is provided in a cylindrical punch guide and can be moved up and down. The punch driver for moving up and down and the punch body are integrally connected via an appropriate connecting tool, and the mutual positioning of the punch driver and the punch body is formed on one key and the other. This is done by engaging the keyway (see, for example, Patent Document 1).
JP 2006-142372 A

  The configuration of the punch die 1 described in Patent Document 1 is as follows. That is, as shown in FIG. 4, the punch die 1 includes a cylindrical punch guide 5 that is supported by a punch holder 3 in a punch press (not shown) so as to be movable up and down. The punch body 7 having a punch blade portion 7B at the lower end portion is provided so as to be movable up and down. In order to move the punch body 7 up and down, a punch driver 11 screwed to the punch head unit 9 so as to be vertically adjustable is integrally connected.

  More specifically, an annular retainer collar 13 is placed on the upper portion of the punch guide 5, and a punch head 17 is disposed at the upper end of a cylindrical head sleeve 15 that passes through the retainer collar 13 so as to be movable up and down. Is fixed. A stripper spring 19 such as a disc spring is mounted between the punch head 17 and the retainer collar 13. The punch driver 11 is screwed onto the head sleeve 15 so that the vertical position can be adjusted from below.

  The punch body 7 and the punch driver 11 are integrated by screwing a lower end portion of a connecting tool 21 such as a pulling bolt penetrating vertically through the axis of the punch driver 11 into the punch body 7. The punch driver 11 and the punch body 7 are positioned relative to each other by engaging a key 25 fixed to the peripheral surface of the punch driver 11 with a set screw 23 in a key groove 27 formed in the punch body 7. Has been done by. The protruding end of the key 25 is engaged with one key groove 5G in the vertical direction formed in the punch guide 5 so as to be movable up and down, and the punch driver 11 and the punch body 7 with respect to the punch guide 5 are engaged. The rotation is restricted.

  Further, a second key 29 is integrally attached to the opposite side of the key 25 with the axial center of the punch driver 11 in between, and this key 29 is formed in the vertical direction formed on the punch guide 5. The second keyway 5GK is engaged with the second keyway 5GK so as to be movable up and down.

  The punch mold 1 described above has a configuration in which the keys 25 and 29 are provided at symmetrical positions around the axis of the punch driver 11, and the punch body 7 is integrated with the punch driver 11. The rotation of the punch driver 11 about the axis about the punch guide 5 is restricted. However, there is a micron-micron clearance between the coupling tool 21 in which the punch driver 11 and the punch body 7 are integrated, the hole through which the coupling tool 21 passes, and between the key 25 and the key groove 27 of the punch body 7. Due to the presence, when a side pressure is applied to the punch blade portion 7B during the nibbling process or the overtaking process, the punch body 7 may move slightly relative to the punch driver 11 and tilt slightly.

  As described above, when the punch blade portion 7B is slightly inclined with respect to the overtaking process direction, for example, during overtaking processing, cutting scraps referred to as “shave” may be generated, and a micro stepped portion may be generated. Since it is difficult to perform a more accurate overtaking process, further improvements have been demanded.

The present invention has been made in view of the above-described problems. A punch body (7) having a punch blade portion (7B) at a lower end portion is provided in a cylindrical punch guide (5 ) so as to be movable up and down. And a punch driver (11) for moving the punch body (7) up and down, and integrally connecting the punch body (7) and the punch driver (11) via a connector (21). provided with the punch body (7) or the punch driver (11) while the provided key said punch body (7) and the punch driver by engaging the keyway (28) with a (35) to the other ( 11) is a punch die that performs mutual positioning with the key body (37) of the key (35) , and has a through hole (39A, 39B) for inserting a set screw (24). With The key body (37) includes a key groove engaging portion (41) that engages with the key groove (28), and the width dimension A of the key groove engaging portion (41) is the width of the key groove (28). The slit (43) for elastically deforming so as to reduce the width when the key groove engaging portion (41) is engaged with the key groove (28) is provided. The key body (37) has a length in the direction along the through hole of the key groove engaging portion (41) longer than the length of the key body (37) in the direction along the through hole. The key groove engaging portion (41) is provided with a protruding portion protruding from the key body (37) .

A cylindrical punch guide (5) is provided with a punch body (7) having a punch blade portion (7B) at its lower end portion so as to be movable up and down and for moving the punch body (7) up and down. A punch driver (11) is provided, and the punch body (7) and the punch driver (11) are integrally connected via a connector (21), and the punch body (7) or the punch driver (11) is provided. A punch die for positioning the punch body (7) and the punch driver (11) by engaging a key (35) provided on one side with a key groove (28) provided on the other side. The key body (37) of the key (35) is provided with through holes (39A, 39B) for inserting the set screws (24), and the key groove (28) is engaged with the key groove (28). Combine A groove engaging portion (41) is provided in the key body (37), and is elastically deformed so that the width dimension is reduced when the key groove engaging portion (41) is engaged with the key groove (28). The key body (37) is provided with a slit (43) for the length of the key groove engaging portion (41) in the direction along the through hole, and the length in the direction along the through hole of the key body (37). The key groove engaging portion (41) is provided with a protruding portion protruding from the key body (37).

  According to the present invention, the key and the key groove for positioning the punch driver and the punch body with each other are engaged with each other in a tightly integrated state, and between the key and the key groove. There is no minute clearance, and the conventional problems as described above can be solved.

  Hereinafter, the configuration of the punch mold according to the embodiment of the present invention will be described in detail with reference to the drawings. Since the overall configuration of the punch mold is substantially the same as the configuration of the conventional punch mold 1 described above, Constituent elements having the same function are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 2, the punch mold 1 according to the embodiment of the present invention has substantially the same configuration as that of the conventional punch mold described above, except that the key 29 is connected to the connector. In FIG. 2, only one key 29 is shown. Note that the key 25 shown in FIG. 4 can be adopted as the other key 29 as it is. The punch driver 11 is arranged in a direction intersecting a radial straight line connecting the pair of keys 29, that is, on a straight line orthogonal to the straight line connecting the keys 29 and passing through the axis of the punch driver 11. And a key 35 for relative positioning of the punch body 7 are provided (FIG. 2 shows the vertical planes orthogonal to each other in the axial center of the connector 21 in order to display the key 29 and the key 35. It is displayed as a cross section). The key 35 may be provided at one location, but it is desirable to provide the key 35 at a symmetrical position with the connector 21 as the center.

  Referring to FIG. 1, the key body 37 of the key 35 includes through holes 39 </ b> A and 39 </ b> B for inserting a set screw 24 corresponding to the set screw 23 in two upper and lower stages. A key groove engaging portion 41 that engages with the key groove 28 of the punch body 7 is formed in the lower portion of the key body 37 so as to extend in the radial direction of the punch body 7 (left and right in FIG. 1A). The width dimension A of the key groove engaging portion 41 is slightly larger than the width dimension B (reference numeral B is not shown) of the key groove 28.

  Then, from the lower through hole 39B to the lower surface of the key groove engaging portion 41, elastic deformation is performed so that the width dimension becomes small when the key groove engaging portion 41 is engaged with the key groove 28. A slit 43 is formed as shown. Therefore, when the key groove engaging portion 41 of the key 35 is engaged with the key groove 28, the key groove engaging portion 41 is elastically deformed so that the width dimension is reduced. The side surface 45 in the width direction of the engaging portion 41 and the inner surface in the width direction of the key groove 28 (inner surfaces facing each other in the direction perpendicular to the paper surface in FIG. 2) are in close contact with each other. In other words, the key groove engaging portion 41 and the key groove 28 are firmly and integrally engaged with each other in a state where the clearance in the width direction is zero.

  In the lower part of both side surfaces 45 of the key groove engaging portion 41 of the key 35, inclined surfaces 45S inclined so as to be close to each other on the lower side so as to be easily engaged with the key groove 28 of the punch body 7. Each is formed. Further, when the key groove engaging portion 41 of the key 35 and the key groove 28 of the punch body 7 are engaged with each other, between the bottom of the key groove 28 and the key 35, for example, a minus driver or the like An inclined surface is formed as an example of a tool insertion portion (tool guide portion) 47 for inserting a distal end portion of a separation tool (not shown).

  By the way, the tool insertion portion 47 inserts the tip portion of a tool such as a flathead screwdriver between the key 35 and the bottom portion of the key groove 28 in order to release the key 35 from the key groove 28 in the engaged state. Therefore, it is sufficient that a slight gap is formed between the key 35 and the bottom of the key groove 28, and not limited to the inclined surface 47, for example, a stepped notch is formed. You may do it. The tool insertion portion 47 may be formed with a tool insertion portion 30 having an appropriate shape on the bottom side of the keyway 28 as shown in FIG.

  When the key 35 having the above-described configuration is attached to the punch driver 11 and the key 35 and the key groove 28 of the punch body 7 are engaged, the key groove engaging portion 41 of the key 35 is elastically deformed to engage with the key groove 28. Therefore, the clearance in the width direction of the key 35 and the key groove 28 is firmly engaged with the state of zero. Therefore, even when a side pressure is applied to the punch blade portion 7B of the punch body 7, the key 35 and the key groove 28 are in a state of being firmly adhered to each other in advance and the punch body 7 is in contact with the punch driver 11. There is no such thing as moving a small amount. Therefore, even when the punch blade portion 7B receives a side pressure, the punch blade portion 7B can always be accurately maintained in the overtaking direction, and the overtaking processing can be performed. It solves the conventional problems.

  When removing the punch body 7 from the punch driver 11 by loosening the tightening of the connector 21 in order to re-polish the punch blade portion 7B, the key 35 and the key groove 28 are passed through the key groove or the long hole 6 of the punch guide 5. By forcibly inserting a tip of a flathead screwdriver or the like into the tool insertion portion 47 (30) between the key 35 and the key groove 28, the engagement between the key 35 and the key groove 28 can be released.

  In the above description, the key 35 is provided on the punch driver 11 side. However, the key and the key groove are in a relative relationship, and the key 35 can be provided on the punch body 7 side.

  By the way, this invention is not restricted to embodiment mentioned above, By implementing an appropriate change, it can implement with another form. That is, the key body 37 is provided with pressing means, and a part of the key body 37 or the pressure contact member provided on the key body 37 is positioned on the opposite surfaces of the key groove (on both sides of the bottom surface of the key groove and perpendicular to the bottom surface). It is also possible to adopt a configuration in which the inner surface is firmly pressed and pressed. In this case, the pressure contact member constitutes a part of the key.

  More specifically, as shown in FIG. 3A, the pair of press contact members 53 protrude from the side surfaces of the key body 37 by pressing means including an elastic member 51 such as a coil spring, which is built in the key body 37. The pressure contact member 53 may be pressed and firmly pressed against the inner surfaces of the key grooves facing each other.

  Further, as shown in FIG. 3B, the key body 37 is provided with a fluid pressure mechanism as an example of a pressing means, and a mini piston 55 provided in the fluid pressure mechanism is used as a pressure contact member. Similarly to the pressure contact member 53, it is also possible to employ a configuration in which the key grooves are firmly pushed and pressed against the mutually facing inner surfaces of the key grooves.

  Further, as shown in FIG. 3C, the key main body 37 is divided into divided main bodies 37A and 37B, and the divided main bodies 37A and 37B are configured to be movable toward and away from each other. And it is set as the structure urged | biased in the direction which mutually approaches with elastic members 57, such as a coil spring, for example, and it is set as the structure which inserts the wedge member 59 between the said division | segmentation main bodies 37A and 37B. Then, the divided main bodies 37A and 37B can be moved away from each other by the wedge member 59, and the divided main bodies 37A and 37B can be pressed against the mutually facing inner surfaces of the key grooves.

  That is, various configurations can be adopted as a configuration in which the key body 37 and the key groove are integrally fixed with zero clearance.

It is explanatory drawing which shows the structure of the key which concerns on embodiment of invention. It is explanatory drawing which shows the whole structure of a punch metal mold | die. It is explanatory drawing which shows the change form of a key. It is explanatory drawing which shows the whole structure of the conventional punch metal mold | die.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Punch die 5 Punch guide 7 Punch body 7B Punch blade part 11 Punch driver 21 Connecting tool 23 Set screw 35 Key 37 Key body 41 Key groove engaging part 43 Slit 47 Tool insertion part (guide part)

Claims (2)

A punch driver having a punch body (7) having a punch blade portion (7B) at a lower end portion in a cylindrical punch guide (5) , which is movable up and down, and for vertically moving the punch body (7). (11) , the punch body (7) and the punch driver (11) are integrally connected via a connector (21), and the punch body (7) or the punch driver (11) A punch mold in which the punch body (7) and the punch driver (11) are positioned relative to each other by engaging a key (35) provided on one side with a key groove (28) provided on the other side. The key body (37) of the key (35) is provided with a through hole (39A, 39B) for inserting a set screw (24), and is engaged with the key groove (28). Part (41) The key body (37) is provided with a width dimension A of the key groove engaging part (41) larger than the width dimension of the key groove (28), and the key groove engaging part (41). The key body (37) is provided with a slit (43) for elastically deforming so that the width dimension becomes small when engaging the key groove (28), and the key groove engaging portion (41) A length in the direction along the through hole is formed longer than a length in the direction along the through hole of the key body (37), and the key groove engaging portion (41) is moved from the key body (37) to the key groove engaging portion (41). A punch mold having a protruding portion protruding . A punch driver having a punch body (7) having a punch blade portion (7B) at a lower end portion in a cylindrical punch guide (5), which is movable up and down, and for vertically moving the punch body (7). (11), the punch body (7) and the punch driver (11) are integrally connected via a connector (21), and the punch body (7) or the punch driver (11) Used for punch molds in which the punch body (7) and the punch driver (11) are positioned relative to each other by engaging the key (35) provided on one side with the key groove (28) provided on the other side. The key body (37) of the key (35) is provided with through holes (39A, 39B) for inserting the set screws (24), and engages with the key groove (28). Keyway A slit for elastically deforming so that a width dimension is reduced when the key body (37) is provided with a joint portion (41) and the key groove engaging portion (41) is engaged with the key groove (28). (43) is provided in the key body (37), and the length of the key groove engaging portion (41) in the direction along the through hole is longer than the length of the key body (37) in the direction along the through hole. The key is characterized in that the key groove engaging portion (41) is provided with a protruding portion protruding from the key body (37).

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