JP4627956B2 - Upper mold equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an upper die apparatus used by being mounted on a punch press such as a turret punch press, and more specifically, the punch body having a punch blade portion at the lower end thereof has a non-circular cross-sectional shape. The present invention relates to the formed upper mold apparatus.
[0002]
[Means for Solving the Problems]
The present invention has been made in view of the above-described problems, and is fitted to the punch guide so as to be vertically movable under the punch driver provided so as to be vertically movable with respect to the punch guide and biased upward. A punch body having a punch blade portion at the lower end is integrally connected, and the punch guide has a rectangular shape in cross section of the punch guide hole and the punch body through which the punch guide guides the punch body in a vertically movable manner. And the punch guide hole is divided into a pair of punch guide pieces on a diagonal line of the rectangular punch guide hole. By providing a recess at the corner of each punch guide hole provided in each divided punch guide piece, and joining the pair of punch guide pieces facing each other recess The punch guide hole formed in this way is formed in a quadrangular shape, and the relative fine rotation of the punch body with respect to the punch guide is restricted to maintain the directionality of the punch blade portion with respect to the punch guide with high accuracy. Therefore, after the guide surfaces of the punch guide holes are machined with high precision by grinding, the axial joint surfaces of the punch guide pieces are joined and integrated, and the pair of punch guide pieces are connected to each other. In order to fix and hold in the joined state, an annular flange member is integrally fitted and fixed to the upper portion of the punch guide, and an annular stripper plate or stripper support member is integrally formed to the lower portion of the punch guide. fitting fixed tare is, in order to integrate the each punch guide piece and said flange member, set at a plurality of positions of the outer peripheral surface of the punch guide Inverted L-shaped engaging grooves that engage with the engaging protrusions are provided at a plurality of locations on the inner peripheral surface of the flange member, and stopper pins that can protrude upward in the punch guide pieces are provided in the punch guides. The flange member is provided with an engagement hole that can be moved up and down and urged upward, and that can be engaged with the stopper pin on the end surface of the flange member .
[0003]
The punch driver 105 is fitted and supported on the punch guide 105 so as to be movable up and down. A disc spring is interposed between the punch head 111 attached to the upper end of the punch driver 107 and the upper surface of the punch guide 105. A powerful stripper spring 113 such as the above is mounted. A punch body (punch) 117 having a punch blade 115 at the lower end is integrally attached to the lower surface of the punch driver 107 in the punch guide 105 via an attachment screw 119.
[0004]
Then, the key groove 117G formed on the upper surface of the punch body 117 is engaged with the key 109 attached to the lower surface of the punch driver 107, whereby the directional positioning of the punch blade portion 115 is performed. Further, a plate presser 121 is attached to the lower surface of the punch guide 105 via a bolt or the like.
[0005]
[Problems to be solved by the invention]
In the conventional configuration as described above, the flange 105F is formed on the upper portion of the punch guide 105, and the fitting hole of the punch body 117 must be processed on the inner side. There is a problem that a lot of time is required for cutting and inner diameter cutting, and the positioning of the direction of the punch body 117 with respect to the punch guide 105 is performed via the key groove 105G2, the key 109, and the key groove 117G. Therefore, even if the direction of the direction of the punch guide 105 is accurately determined with respect to the upper mold holder 103, the minute gap between the key groove 105G2 and the key 109 and the gap between the key 109 and the key groove 117G are present. Therefore, the positioning of the direction of the punch blade 115 can be maintained with higher accuracy or high-precision machining can be performed. It is desired further improvement in.
[0006]
[Means for Solving the Problems]
The present invention has been made in view of the above-described problems, and is fitted to the punch guide so as to be vertically movable under the punch driver provided so as to be vertically movable with respect to the punch guide and biased upward. A punch body having a punch blade portion at the lower end is integrally connected, and the punch guide has a rectangular shape in cross section of the punch guide hole and the punch body through which the punch guide guides the punch body in a vertically movable manner. And the punch guide hole is divided into a pair of punch guide pieces on a diagonal line of the rectangular punch guide hole. , with a recess at a corner of the punch guide hole provided in the punch guide pieces divided, to joining the pair of punch guide pieces facing each of said recesses The punch guide hole formed in this way is formed in a quadrangular shape, and the relative fine rotation of the punch body with respect to the punch guide is restricted to maintain the directionality of the punch blade portion with respect to the punch guide with high accuracy. Therefore, after the guide surface of the punch guide hole is processed with high accuracy by grinding, the axially bonded surfaces of the punch guide pieces are joined and integrated.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIG. 1, an upper die apparatus 1 according to a first embodiment of the present invention is a punch guide that is supported by a vertical mounting hole 4 formed in an upper die holder 3 in a punch press so as to be movable up and down. 5 is provided. The punch guide 5 is composed of a plurality (a pair) of punch guide pieces 9A and 9B which are joined and integrated at the joining surface 7 in the axial direction. Therefore, when calling it the punch guide 5, the structure which united a pair of punch guide pieces 9A and 9B is made into object.
[0016]
The lower side of the retainer collar 13 is fitted into a large-diameter circular recess 11 formed in the upper portion of the punch guide 5 and is detachably fixed by a fixing tool 15 such as an O-ring. A ring-shaped separate flange member 17 is fixed between the punch guide 5 and the retainer collar 13 by pressure, and a plurality of flange members 17 are provided on the upper surface of the upper holder 3. Is supported by a lifter spring 19.
[0017]
The flange member 17 can be integrally fixed to the upper portion of the punch guide 5 with a bolt or the like. Further, the flange member 17 may be fitted to the upper outer peripheral surface of the punch guide 5, and the upper portion of the punch guide 5 may be integrally tightened and fixed with the flange member 17.
[0018]
A punch driver 21 is supported on the retainer collar 13 so as to be movable up and down and rotatable. An annular spring seat 23 that is in contact with a punch head 21H provided at the upper end of the punch driver 21 from below and the retainer. A powerful stripper spring 25 is mounted between the collar 13. A lower end portion of a cylindrical safety cover 27 surrounding the stripper spring 25 is fixed to the retainer collar 13 through a fixture 29 such as a ring as appropriate, and is formed inside the upper end portion of the safety cover 27. The inner flange portion 31 is in contact with the upper surface of the spring seat 23.
[0019]
The punch guide 5 is fitted with a punch body (punch) 35 having a punch blade portion 33 at its lower end so as to be movable up and down. An adjustment screw 39 is connected to the upper portion of the punch body 35 via a bolt 37. Are integrally attached. The adjusting screw 39 is screwed into a screw hole 41 formed at the lower end of the punch driver 21.
[0020]
In order to perform indexing when the punch driver 21 is rotated about its axis, a plurality of vertical engaging grooves 43 are formed at equal intervals in the circumferential direction on the outer peripheral surface of the lower end portion of the punch driver 21. An appropriate engagement member 45 such as a ball plunger attached to the punch guide 5 is engaged with the engagement groove 43.
[0021]
Accordingly, the vertical position of the punch blade portion 33 can be adjusted by rotating the punch driver 21 with respect to the adjusting screw 39, and can cope with shortening due to re-polishing of the punch blade portion 33. It is. In addition, when re-polishing becomes impossible, it can be replaced with a separate new punch body 35.
[0022]
A plate retainer 49 is detachably attached to the lower portion of the punch guide 5 via a fixture 47 such as an O-ring. The upper die is formed in the vertical key groove 51 formed on the outer peripheral surface of the punch guide 5. A key 53 attached to the holder 3 is engaged.
[0023]
In the configuration as described above, when the punch head 21H is struck and lowered by a striker (not shown) that can move up and down in the punch press, the entire upper die device 1 is first lowered relative to the upper die holder 3 against the lifter spring 19. After the plate retainer 49 presses and fixes the plate-like workpiece (not shown) against the lower mold (not shown), the punch driver 21 is further lowered against the stripper spring 25 to prepare the punch body 35. The workpiece is pressed by the punch blade portion 33.
[0024]
Incidentally, the punch guide hole through which the punch guide 5 guides the punch body 35 so as to move up and down, that is, the cross-sectional shape of the sliding fitting portion 55 between the punch guide 5 and the punch body 35 is, for example, a non-square shape or the like. The punch body 35 is formed in a circular shape, and the punch body 35 has a non-circular shape such as a square shape corresponding to the cross-sectional shape of the sliding fitting portion 55. Therefore, by processing the guide surface of the sliding fitting portion 55 and the outer shape of the punch body 35 with high precision, the relative small rotation of the punch body 35 with respect to the punch guide 5 can be restricted, and the punch blade for the punch guide 5 is controlled. The directionality of the portion 33 can be maintained with higher accuracy.
[0025]
As a processing method of the sliding fitting portion 55, for example, an electric discharge machining method such as a wire cut electric discharge machining can be adopted, but in the present embodiment, the punch guide piece 9A divided in advance in the punch guide 5 is provided. After the sliding fitting portion 55 of 9B is processed with high precision by grinding or the like, the joint surfaces 7 of the punch guide pieces 9A and 9B are joined and integrated. The outer peripheral surfaces of the punch guide pieces 9A and 9B are ground into a high-precision circle in a state where both are integrated.
[0026]
As a configuration for joining and integrating the joint surfaces 7 of the punch guide pieces 9A and 9B, for example, a structure in which dovetails and dovetails are formed on the joint surface 7 and engaged, or both punch guide pieces 9A and 9B are engaged. Since various configurations such as a configuration in which knock pins are driven and integrated can be employed, detailed description of the specific configuration is omitted.
[0027]
As can be understood from the above description, the cross-sectional shapes of the sliding fitting portion 55 of the punch guide 5 and the punch body 35 are formed in a non-circular shape so that the relative rotation of the punch body 35 with respect to the punch guide 5 is small. Therefore, the relative fine rotation angle can be made smaller than that of the conventional configuration as described above, and the directionality of the punch blade portion 33 with respect to the punch guide 5 can be maintained with higher accuracy. High-precision press working can be performed.
[0028]
Moreover, in the said structure, since it is the structure which provided the punch guide 5 and the flange member 17 separately, while being able to reduce the processing amount removed by the outer periphery cutting of the punch guide 5, etc., generation | occurrence | production of chips can be suppressed, Compared to the above, the overall manufacturing cost can be kept low.
[0029]
FIG. 3 shows an upper mold apparatus 61 according to the second embodiment of the present invention. Similar to the upper mold apparatus 1, the upper mold apparatus 61 includes a punch guide 63 that is supported by the vertical holder 3 in a punch press so as to be movable up and down.
[0030]
As shown in FIG. 4, the punch guide 63 is divided into a pair of punch guide pieces 67 </ b> A and 67 </ b> B on the diagonal line of the rectangular punch guide hole 69. The punch guide 63 is composed of a plurality of (a pair of) punch guide pieces 67A and 67B joined and integrated at the joining surface 65 in the axial direction, and is formed by joining the punch guide pieces 67A and 67B. punch guide hole (slide fitting portion) 69 which is, as shown in FIG. 4, it is formed in a square shape. As is clear from FIG. 4A, a recess is provided at the corner of each punch guide hole of each punch guide 67A, 67B .
[0031]
In order to fix and hold the pair of punch guide pieces 67 </ b> A and 67 </ b> B in a state of being joined to each other by the joining surface 65, an annular portion provided with a flange portion 71 </ b> F supported by a lifter spring 19 is provided on the upper portion of the punch guide 63. The flange member 71 is integrally fitted and fixed. An annular stripper plate or an annular stripper support member 73 that supports the stripper plate is integrally fitted and fixed to the lower portion of the punch guide 63.
[0032]
That is, the pair of punch guide pieces 67 </ b> A and 67 </ b> B are held in an integrally joined state by the flange member 71 and the stripper support member 73. The configuration for holding the pair of punch guide pieces 67A and 67B in an integrally joined state is not limited to the configuration described above, and the punch guide 63 in a state in which the pair of punch guide pieces 67A and 67B are joined. A plurality of circumferential grooves are formed at appropriate intervals on the outer circumferential surface of each of the two, and an elastic ring member such as an O-ring is engaged and embedded in each circumferential groove, and the pair of punch guide pieces 67A and 7B is embedded by the elastic ring member. It is also possible to adopt a configuration in which the bonding state of is maintained.
[0033]
The outer peripheral surface is formed in a circular shape so that the pair of punch guide pieces 67A and 67B are fitted into the mounting hole 4 when they are joined to each other. A flat portion 74 having a predetermined width which is a positioning reference surface of the punch guide 63 with respect to the hole 4 is formed long in the vertical direction.
[0034]
In order to integrate the punch guide pieces 67A and 67B and the flange member 71, the punch guide 63 into which the flange member 71 is fitted has a plurality of locations on the outer peripheral surface of the small diameter portion 63A (see FIG. 5) at the upper end. Is provided with an engaging projection 75 such as a ball. In addition, at a plurality of locations on the inner peripheral surface of the flange member 71, inverted L-shaped engagement grooves 77 having vertical grooves 77A and circumferential grooves 77B that engage with the engagement protrusions 75 are formed. It is.
[0035]
Further, each of the punch guide pieces 67A and 67B is provided with a stopper pin 79 whose upper end is freely projectable upward and urged upward by a spring or the like. An engagement hole 81 that can be engaged with the stopper pin 79 is formed on the end surface.
[0036]
With the above configuration, when the punch guide pieces 67 </ b> A and 67 </ b> B are joined to each other, the engagement protrusion 75 provided on the small diameter portion 63 </ b> A of the upper end portion of the punch guide 63 is reversely provided on the inner peripheral surface of the flange member 71. The flange member 71 is fitted to the small diameter portion 63A so that the vertical groove 77A in the L-shaped engagement groove 77 is engaged, and then the engagement protrusion is formed at the end of the circumferential groove 77B. When the flange member 71 is rotated with respect to the punch guide 63 so that 75 is in contact with the punch guide 63, the upper end portion of the stopper pin 79 provided in each punch guide piece 67A, 67B corresponds to the engagement hole 81 formed in the flange member 71. And engage. Therefore, each punch guide piece 67A, 67B and the flange member 71 are integrated.
[0037]
In order to remove the flange member 71 from the punch guide 63, a tool is appropriately inserted from the vertical slots 83A and 83B provided in the punch guide pieces 67A and 67B and engaged with the stopper pin 79 to resist the urging force. Then, the stopper pin 79 is pushed down to disengage the stopper pin 79 from the engagement hole 81 of the flange member 71. Thereafter, the flange member 71 is rotated with respect to the punch guide 63 in the direction opposite to that described above, and the engagement protrusion 75 is moved relatively to the portion of the groove 77A in the vertical direction. Then, the flange member 71 is detached from the punch guide 63 by moving the flange member 71 upward.
[0038]
Since the configuration in which the stripper support member 73 is attached to and detached from the punch guide 63 is a configuration in conformity with the flange member 71, the same reference numerals are given to the components having the same functions, and redundant description is omitted. .
[0039]
As shown in FIG. 3, a retainer collar 85 is fixed to the above of the punch guide 63 via an O-ring, a pin, and the like, and an upper end portion of a punch driver 87 penetrating the retainer collar 85 up and down. A stripper spring 89 is mounted between the retainer collar 85 and the stripper spring 89 is surrounded by a safety cover 91 attached to the retainer collar 85.
[0040]
The lower end portion of the punch driver 87 has a quadrangular (non-circular) cross-sectional shape corresponding to the punch guide hole 69 and is fitted into the punch guide hole 69 so as to be movable up and down. A square (non-circular) punch body 93 having a cross-sectional shape corresponding to the punch guide hole 69 is detachably screwed to the lower end surface of the punch driver 87. A punch blade portion 93 </ b> A provided at the lower end is engaged with a stopper plate 95 supported by the stripper support member 73.
[0041]
The punch guide 63 is fitted into the mounting hole 4 of the upper die holder 3, and the end face of the appropriate number of positioning keys 95 provided in the upper die holder 3 is formed on the vertical plane portion 74 provided on the outer peripheral surface of the punch guide 63. The punch guide 63 is directionally positioned by joining flat surfaces such as these.
[0042]
In the above configuration, the same effects as those of the first embodiment described above can be obtained.
[0043]
【The invention's effect】
As can be understood from the above description, according to the present invention, the relative slight rotation of the punch body with respect to the punch guide can be effectively suppressed, and the cutting amount of the outer peripheral surface of the punch guide can be reduced. As described above, the conventional problems can be solved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view of an upper mold apparatus according to an embodiment of the present invention.
2 is an explanatory cross-sectional view taken along line II-II in FIG.
FIG. 3 is an explanatory cross-sectional view of an upper mold apparatus according to a second embodiment.
FIG. 4 is a diagram illustrating the configuration of a punch guide.
FIG. 5 is a diagram illustrating the configuration of a punch guide.
FIG. 6 is an explanatory cross-sectional view showing a configuration of a conventional upper mold apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Upper mold | type apparatus 5 ... Punch guide 7 ... Joint surface 9A, 9B ... Punch guide piece 13 ... Retainer collar 17 ... Flange member 21 ... Punch driver 21H ... Punch head 25 ... Stripper spring 33 ... Punch blade part 35 ... Punch body ( punch)
39 ... Adjustment screw 41 ... Screw hole 43 ... Engagement groove 45 ... Engagement member 55 ... Sliding fitting part 61 ... Upper mold device 63 ... Punch guide 63A ... Small diameter portion 65 ... Joining surface 67A, B ... Punch guide piece 69 ... Punch guide hole (sliding fitting part)
71 ... Flange member 71F ... Flange portion 73 ... Stripper member 74 ... Flat surface portion 75 ... Engagement projection 77 ... Engagement groove 79 ... Stopper pin 81 ... Engagement hole

Claims (1)

A punch body that is vertically movable with respect to the punch guide and is urged upward is fitted to the punch guide so that it can move vertically and has a punch blade at the lower end. A punch guide hole for the punch guide to guide the punch body to move up and down and a cross-sectional shape of the punch body are formed in a quadrangular shape, and penetrates the punch guide hole in the vertical direction. The punch guide is divided into a pair of punch guide pieces on a diagonal line of the rectangular punch guide hole, and each punch guide hole provided in each divided punch guide piece is provided. A punch guide hole formed by providing a concave portion at a corner and joining the pair of punch guide pieces facing each concave portion is formed in a square shape. The guide surface of the punch guide hole is made high by grinding in order to control the minute rotation of the punch body relative to the punch guide and to maintain the direction of the punch blade portion with respect to the punch guide with high accuracy. After the machining is performed with accuracy, the axial joining surfaces of the punch guide pieces are joined and integrated, and the upper portion of the punch guide is fixed to hold the pair of punch guide pieces in a joined state. wherein an annular flange member with equipped with fitted integrally fixed to the punch guide of the lower annular stripper plate or stripper support member fixedly fitted integrally to tare is, with the respective punch guide piece In order to integrate the flange member, an inverted L-shaped engagement groove that engages with an engagement protrusion provided at a plurality of locations on the outer peripheral surface of the punch guide is provided in the flange. Provided at a plurality of locations on the inner peripheral surface of the die member, and provided with stopper pins which are capable of projecting upward in the upward direction of the punch guide pieces and urged upward in the respective punch guides. An upper mold apparatus comprising an engagement hole on an end face that can be engaged with the stopper pin .

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