JP3564471B1 - Press mold and die for punch press machine - Google Patents

Abstract

【Task】
Provided are a press-molding die and a die having excellent durability, which can ensure good processing accuracy irrespective of the material and the plate thickness.
[Solution]
A moat-shaped groove 3 arranged so as to surround the punched hole 2 of the die and through slits 4a, 4b, 4c and 4d extending from the periphery of the punched hole 2 to the moat-shaped groove. Form. In a shearing process in which the pressing die is pushed down by the striking element (striker) of the turret punch press device, the through slits 4a, 4b, 4c, and 4d are opened according to the magnitude of the punching load, the groove 3 is narrowed, and the punching hole is formed. The die edge portions 5a, 5b, 5c and 5d of the two peripheral edges are enlarged.
[Selection diagram]
FIG.

Description

  The present invention relates to a die for a press and a die for a punch press used in a punch press machine or the like.

  In general, in press working, a press die composed of a male mold and a female mold designed according to the shape of the finished product, the material of the plate material, the thickness, etc. is used, and a general-purpose press including a turret punch press machine is used. In processing by a punch press machine, a punch die and a die die, which are selected according to a processing shape, a material of a plate material, a thickness, and the like, are used. FIG. 9 is a diagram showing a conventional die for punch press. In general, if the clearance is too large, so-called excessive dripping, burrs, and warpage may occur. If the clearance is too small, the punching load increases. It is required that the management of the dimensional difference (R-r) between the cutting edge diameter r of the mold and the cutting edge diameter R of the die mold is appropriately performed. An appropriate clearance kt is determined by multiplying the thickness t of the plate material serving as the base material of the product by a so-called clearance coefficient k determined for each material of the plate material. It is desired to select a die and a die. Therefore, for example, when performing a work of punching a hole of a specific shape in a plate material of a specific material and thickness, when the plate thickness and material of the next operation are different, or when the diameter of the punch of the next operation is different, , The die had to be replaced.

  FIG. 10 is a front view of a conventional turret punch press. Referring to FIG. 10, the turret punch press apparatus 10 is provided with a disk-shaped upper turret 11 and a lower turret 12, which are rotatably opposed to each other. The upper turret 11 has a large number of punch dies mounted on the circumference thereof at appropriate intervals so as to be vertically movable. Similarly, the lower turret 12 has a large number of die dies mounted on the circumference thereof at appropriate intervals. Furthermore, the turret punch press device 10 includes a striking element (striker) 13 that operates with a crank, hydraulic pressure, or the like, and can strike a punch die at a predetermined position. The turret punch press device 10 further includes a workpiece gripping / moving means 14 so that a predetermined position on the workpiece can be horizontally moved below a striking element (striker). The operations of these turret punch presses are numerically controlled by a numerical control (NC control) device 20 that reads and executes a program created in advance. As described above, the turret punch press apparatus can produce products of various specifications by selecting an appropriate punch die and die die by numerical control.

  In the turret punch press device 10 capable of accommodating such a large number of die dies, the number of die dies that can be mounted on the turret punch press device 10 is limited by the number of die holders provided in the lower turret 12. If an appropriate die is not contained in the die holder of the lower turret 12, the die itself needs to be replaced. In addition, since the die itself wears, it is necessary to perform maintenance such as re-grinding of the die for each predetermined number of hits. Japanese Patent Application Laid-Open No. Hei 9-141349 solves this problem by providing a turret punch device with a die exchanging device to facilitate die exchange.

JP-A-9-141349

  By the way, even if there is a change in the material of the work material, the thickness of the work material, etc., it is necessary to modify the mold if it is possible to provide a press mold with excellent availability while ensuring the desired quality. Is eliminated, which is significant in terms of cost. Also, in the case of a punch press using a punch press machine or a turret punch press machine, the number of dies can be reduced with the use of a die changing device or the like described in JP-A-9-141349 or the like. It is possible to perform punch press processing while ensuring desired quality. The present invention has been made from each of the above-mentioned viewpoints, and the object thereof is to maintain a processing accuracy, and to be used irrespective of the material and plate thickness of a processed material, and to be used for a press having excellent durability. An object of the present invention is to provide a die and a die for a punch press.

  In addition, the present invention also solves the interference with the corners of the female mold that has contributed to the deterioration of the male mold having the corners, and has a punched shape having the corners and other molded shapes. Another object of the present invention is to provide a press die and a die that can be preferably applied to processing.

According to a first aspect of the present invention, which provides a means for solving the above-mentioned problems, a predetermined distance is provided from an end of the female mold along a concave part (recess / molding concave part). A press die is provided, comprising: a non-through groove; and a plurality of through slits extending from an end of the concave portion to the groove. The depth of the non-penetrating groove is such that, during pressing, a region sandwiched by the female concave part, the non-penetrating groove and the through slit is bent at least to the opposite side of the concave part. With this configuration, flexibility is given to the periphery of the female concave portion, the through slit is opened, and the non-penetrating groove is narrowed according to the magnitude of the pressing load. Make it deform.

According to the second aspect of the present invention, a non-through groove provided on the outer side of the die tip portion of the hole periphery of the die tool, the grooves of the non-through from the end of the die tool of holes A plurality of through slits are provided, and a die for a punch press machine is provided. The depth of the groove is such that at least the die tip portion sandwiched between the hole of the die mold, the non-penetrating groove and the through slit bends at least to the opposite side of the hole of the die mold. With this configuration, flexibility is given to the die edge portion, the through slit is opened according to the magnitude of the pulling load, the non-through groove is narrowed, and the die edge portion is opposite to the hole of the large die. Elastically deform to the side.

Further, according to a third aspect of the present invention, the non-penetrating groove is arranged in a moat shape with respect to the female concave portion or the hole of the die die, and surrounds the periphery of the female concave portion or the die cutting edge portion. A press die or a die for a punch press machine is provided.

Also, the outer and outer peripheral portions (outer wall portions) of the groove can support the peripheral region of the female concave portion or the die cutting edge portion in a pressing process such as punching, so that the non-penetrating groove can be supported. Preferably, the width is set to a predetermined width.

  In the case where the shape of the female concave portion or the hole of the die mold has a corner portion (corner portion) having an arbitrary angle, the above-mentioned through slit extends from the corner portion to the groove. It is preferable to be provided so as to extend in the section.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to respond | correspond to various board | substrate materials and board thickness, without being restricted by clearance with one set of press die or one die. In addition, it is possible to prevent deterioration of the male mold / punch mold side and cracking of the female mold / die mold due to misalignment or insufficient clearance, and to improve durability. Further, in a general-purpose punch press machine, it is possible to significantly reduce the frequency of changing die dies. Furthermore, in the case where the shape of the extruded portion of the male die of the press die includes a corner (corner) portion of an arbitrary angle, or the case where the punch die is a square shape such as a square, a rectangle, or a hexagon, When the starting point of the through slit of the corresponding female mold and die mold is arranged at the corner as described above, avoid interference between them, prevent deterioration of the male mold or punch mold, and further improve durability. Can be improved.

  Next, the best mode for carrying out the present invention will be described. In a preferred embodiment of the present invention, a moat-shaped groove (3 in FIG. 1) surrounding a punched hole (2 in FIG. 1) of a die (1 in FIG. 1) is provided. A plurality of through slits (4a, 4b, 4c, 4d in FIG. 1) are provided in a section from an end to the groove. The groove (3 in FIG. 1) is formed concentrically and in the same shape according to the shape of the punched hole, and is formed with a depth such that the die tip portions (5a, 5b, 5c, and 5d in FIG. 1) bend. The through slits (4a, 4b, 4c, 4d in FIG. 1) are provided at respective positions so that the die edge of the die (1 in FIG. 1) expands uniformly according to the punching load. By arranging the holes so as to extend radially from the center of the hole (2 in FIG. 1), the die blade portions (5a, 5b, and 5a in FIG. 1) are pressed in accordance with the load applied from the press die during pressing. 5c, 5d) expand concentrically. According to the die having the above-described configuration, since the die edge portion has flexibility, it is possible to perform the punching with good accuracy regardless of the thickness and the material of the die. . In addition, in the case of pressing a thick plate that has conventionally been required to have a large clearance, or in the state where the clearance is too large from the viewpoint of clearance management, the so-called excessive sag is maintained while maintaining appropriate dimensional accuracy. , Burrs and warpage can be suppressed. In the die having the above configuration, even if it is difficult to visually confirm the shape and specification of the punched hole (2 in FIG. 1), the groove (3 in FIG. 1) and the through-slit ( The arrangement of 4a, 4b, 4c and 4d) in FIG. 1 makes it easy to identify.

  Next, a first embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 (a) and 1 (b) are a plan view and a front view, respectively, showing an example of a die 1 for a punch press for performing round cutting with a diameter of 3.0 mm. Referring to FIG. 1, a die die 1 made of die steel is provided with a circular punched hole 2 provided with a clearance of 0.2 mm on both sides and surrounds the circular punched hole 2. A groove 3 having a width Δr is provided. Further, through slits 4a, 4b, 4c, and 4d are provided in a cross shape from the periphery of the punched hole 2 of the die 1 to the groove 3, and the die edge portions 5a, 5b, 5c, and 5d inside the circular groove 3 are provided. However, it is possible to bend in the direction of the arrow in FIG. For example, if the inner circumference of the circular groove 3 takes 3.0 mm as the diametrical width of the die edge portions 5a, 5b, 5c, and 5d, it becomes a circular groove having an inner diameter of 6.2 mm. If the bending limit of 5a, 5b, 5c, and 5d is 0.2 mm on one side, the width Δr of the groove 3 is 0.2 mm. Further, the depth of the groove 3 is determined so that the die tip portions 5a, 5b, 5c, and 5d are appropriately bent according to the punching load, and a predetermined strength and durability are obtained. In the example of FIG. 1, the thickness is about 60% of the vertical thickness of the die edge.

  For example, when the clearance coefficient of the cold electrogalvanized steel sheet (SPC) is 0.15, it is preferable to take a 0.3 mm clearance in the case of a plate thickness of 2.0 mm, and in a case of a plate thickness of 4.0 mm. , 0.6 mm is preferred. The die 1 according to the present invention, in which the grooves 3 and the slits 4 are provided, can be used in common without using individual die dies in which the plate thickness of the plate material to be processed satisfies a predetermined clearance. . Similarly, when the clearance coefficient of the stainless steel plate is 0.2, and when the plate thickness is 2.0 mm, it is preferable to have a clearance of 0.4 mm. The die 1 according to the present invention provided with 4b, 4c, and 4d can be used in common. Then, even when the withdrawal load is excessive, the die edge portions 5a, 5b, 5c, and 5d are configured to contact and be supported by the outer peripheral portion of the groove 3, so that the die edge portion is Loss situations are also effectively avoided.

  Further, it will be described below that the present invention is also useful for displacement of a punch die or a die die. Since the die edge portions 5a, 5b, 5c, and 5d of the present embodiment can flexibly bend, for example, in FIG. 1 and FIG. 11, the punch die is shifted to the upper right side. Conventionally, the clearance is too small at the upper right side of the die edge portion, while the clearance at the lower left side in FIG. 1 is too large. However, according to the die of the present embodiment, the die edge portion 5a of FIG. 1 is largely bent, and it is possible to absorb the displacement of the press die, and it is possible to perform the press working with good dimensional accuracy. It becomes possible. Of course, as described above, since the die edge portion is configured to expand flexibly, the die mold of this embodiment can be easily applied to the overtaking process, which conventionally required a large clearance. It is.

  Next, a second embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 2A and 2B are a plan view and a front view, respectively, showing an example of a die 1 for a punch press for punching a corner. Referring to FIG. 2, the die 1 is provided with a square groove 3 surrounding the square punched hole 2 and bounding the die cutting edge portions 5a, 5b, 5c, 5d and the other portions. I have. The size and width of the square groove 3 are determined by the width, strength, durability, and degree of bending of the die edge portions 5a, 5b, 5c, and 5d, as in the above-described first embodiment of the present invention. Further, from the corner of the square punched hole 2 to the corner of the groove 3, through slits 4a, 4b, 4c and 4d are provided.

  According to the present embodiment, as is clear from the above description of the first embodiment of the present invention, a square die mold that can be used irrespective of plate thickness and material and can cope with a mold displacement. Is provided, and the minute R (arc portion) at the corner of the die is removed, so that it is possible to prevent deterioration due to interference of the corner of the rectangular punch.

  Next, a third embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 3A and 3B are a plan view and a front view, respectively, showing an example of a die 1 for a punch press for punching a rectangular corner. Referring to FIG. 3, the die 1 is provided with a horizontally elongated rectangular groove 3 which surrounds the horizontally elongated punched hole 2 and is arranged at a predetermined position and depth with the strength of the die cutting edge portion. In addition to the through slits at each corner of the groove 3 from the corner of the punched hole 2, 4 e and 4 f are provided at the midpoint of the long side of the groove 3. Therefore, among the die edge portions 5a, 5b, 5c, and 5d, the die edge portions 5a and 5c having a large cross-sectional area are further divided into 5a, 5a ', 5c, and 5c', which are equal to the die edge portions 5b and 5d. It has been expanded. According to the present embodiment, as is clear from the above description of the first and second embodiments of the present invention, a rectangular prism which can be used irrespective of the thickness and material of the plate and can cope with the displacement of the mold. And the minute R (arc portion) at the corner of the die is removed, and deterioration due to interference at the corner of the rectangular punch can be prevented.

  As described in the third embodiment, the present invention can be sufficiently applied to press working of shapes other than a perfect circle and a square. Although the example in which the arrangement of the slits is adjusted to achieve uniform spreading of the die tip portion has been described, for example, as shown in FIG. 4, by adjusting the thickness of the die tip portion, this can be achieved. Is possible. In FIG. 4, the grooves 3 are formed so that the widths of the die edge portions 5a and 5c (in the vertical direction in FIG. 4) are reduced. Further, as shown in FIG. 5, the depth t of the groove 3 or the thickness T of the die mold may be partially or entirely changed according to the shape of the punched hole. For example, in FIG. 5, the depth of the groove on the upper and lower sides of the groove 3 is made deeper than the depth of the left and right sides, and the groove 3 having a difference in (T−t) is formed. Similarly, as shown in FIGS. 6 and 7, a groove 3 having a shape dug down at an inclination angle θ is formed toward the punching hole 2 or in a direction opposite to the punching hole 2 side, and the bending condition is obtained. May be adjusted. As described above, although the depth t of the groove 3, the inclination angle θ of the groove 3, the thickness T of the die mold, and the thickness of the die edge portion can uniformly spread the die edge portion, Depending on the shape of the punched hole 2, these can be appropriately combined to achieve both flexibility and durability of the die edge portion.

  The grooves 3 and the through slits 4 in each of the above-described embodiments can be formed by known mold processing means such as electric discharge machining and wire electric discharge machining. Of course, other processing means that have been postponed from the viewpoint of cost may be adopted.

  As described above, the example in which the present invention is applied to the die for punch press for performing circle punching, square punching, and rectangular punching has been described. However, as will be understood from the description of each of the above-described embodiments, the present invention By making the change, not only the hexagonal die mold illustrated in FIG. 8 but also a so-called R type (sector shape), a joint type, a corner radius type, a punching process of other special shapes, a die die with a die punch, etc. are added. It can be applied to molding using a mold.

  Further, for example, when used for overtaking or when a specific portion has a special punch shape that wears quickly, the groove 3 and the through slit 4 are always provided so as to go around the punched hole 2 of the die. There is no need to provide the groove 3 and the through slit 4 only in a part of the outside of the punched hole 2 of the die (non-shearing side or a part that wears quickly). For example, the groove 3 in FIG. 1 is formed into a semicircular shape with only the right half, and the die cutting edge portion on the side without the groove 3 is not provided with the through slit 4d. Similarly, the groove 3 in FIG. There is a configuration in which the shape is C-shaped and the corner through slits (corresponding to 4a and 4b in FIG. 4) on the right side of the through slits 4e and 4f are omitted.

  Also, the base material of the die can be adopted in the range of the principle of the present invention, such as die tool steel and alloy tool steel for other die.

  Similarly, as can be understood from the description of each of the above embodiments, the present invention can be applied to any press shape. The present invention can be easily applied by providing the groove and the through slit of the present invention around a punched hole or a concave portion for forming process included in the female die of the press die.

FIG. 2 is a plan view (a) and a front view (b) of a die according to a first embodiment of the present invention. It is a top view (a) and a front view (b) of a die of a 2nd example of the present invention. It is a top view (a) and a front view (b) of a die of a 3rd example of the present invention. It is a top view (a) of a die and a front view (b) for explaining another example of the present invention. It is a top view (a) of a die and a front view (b) for explaining another example of the present invention. It is a top view (a) of a die and a front view (b) for explaining another example of the present invention. It is a top view (a) of a die and a front view (b) for explaining another example of the present invention. It is a top view (a) of a die and a front view (b) for explaining another example of the present invention. It is the top view (a) and front view (b) of the conventional die. It is a front view of the conventional turret punch press device.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Die die 2 Punching hole 3 Groove 4, 4a, 4b, 4c, 4d Through slit 5, 5a, 5b, 5c, 5d Die cutting edge part 10 Turret punch press device 11 Upper turret 12 Lower turret 13 Striking element (striker)
14 Holding and moving means 20 Numerical control (NC control) device

Claims (12)

Along the female recess, a non-penetrating groove provided at a predetermined distance from the end of the recess,
Including a plurality of through slits from the end of the recess to the non-through groove,
The non-penetrating groove has a predetermined depth such that a region sandwiched between the female concave part, the non-penetrating groove and the through slit is bent at least to the opposite side of the concave part,
Mold for press characterized by the following. Along the female recess, a non-penetrating groove provided at a predetermined distance from the end of the recess,
Including a plurality of through slits from the end of the recess to the non-through groove,
The non-penetrating groove has a predetermined depth such that a region sandwiched between the female concave part, the non-penetrating groove and the through slit bends to at least the opposite side of the concave part,
Said outer portion of the non-through grooves support the realm sandwiched in the groove and the through slit of the concave portion and the non-through of the female flex in response to press load,
Mold for press characterized by the following. A non-penetrating groove surrounding the periphery of the female recess;
Including a plurality of through slits from the end of the recess to the non-through groove,
The non-penetrating groove has a predetermined depth so that the region of the peripheral part of the concave part sandwiched between the female concave part, the non-penetrating groove and the through slit is bent at least outward,
Mold for press characterized by the following. A non-penetrating groove surrounding the periphery of the female recess;
Including a plurality of through slits from the end of the recess to the non-through groove,
The non-penetrating groove has a predetermined depth so that a region of the peripheral part of the concave part interposed between the female concave part, the non-penetrating groove and the through slit is bent at least outward,
The outer peripheral portion of the non-through grooves to support the region of the recess periphery sandwiched groove and through slit of the flex in response to press load female recess and non-penetrating,
Mold for press characterized by the following. The shape of the recess has a corner portion,
Having the through slit extending from the corner of the recess as a starting point,
The press die according to any one of claims 1 to 4, wherein: The press die according to any one of claims 1 to 5,
Wherein as the recess of the female mold delimited by the through slit and a non-through groove flex evenly each realm sandwiched through slit, that a combination of the non-penetrating grooves or through slit,
Mold for press characterized by the following. A non-penetrating groove provided outside the die edge portion of the periphery of the die mold hole,
A plurality of through slits extending from the end of the hole of the die to the non-through groove,
The groove has a predetermined shape such that a die edge portion of a peripheral edge of a hole of the die mold sandwiched between at least a hole of the die mold, a non-through groove, and a through slit bends at least to the opposite side of the hole of the die mold. Having a depth,
A die for a punch press machine. A non-penetrating groove provided outside the die edge portion of the periphery of the die mold hole,
A plurality of through slits extending from the end of the hole of the die to the non-through groove,
In the non-penetrating groove, at least a die edge portion of a periphery of the die die hole sandwiched between the die die hole, the non-penetrating groove, and the through slit bends at least to the opposite side of the die die hole. Have a predetermined depth,
An outer portion of the non-penetrating groove supports the die cutting edge portion that bends in response to a press load,
A die for a punch press machine. A non-penetrating groove surrounding the die cutting edge portion of the hole periphery of the die mold,
A plurality of through slits extending from the end of the hole of the die to the non-through groove,
The non-penetrating groove has a predetermined depth such that a die cutting edge portion of a peripheral edge of the die die hole sandwiched between the die die hole, the non-penetrating groove, and the through slit bends at least outward. ,
A die for a punch press machine. A non-penetrating groove surrounding the die cutting edge portion of the hole periphery of the die mold,
A plurality of through slits extending from the end of the hole of the die to the non-through groove,
The non-penetrating groove has a predetermined depth such that a die cutting edge portion of a peripheral edge of the die die hole sandwiched between the die die hole, the non-penetrating groove, and the through slit bends at least outward. ,
The outer peripheral portion of the non-penetrating groove supports the die cutting edge portion that bends according to a press load,
A die for a punch press machine. The shape of the die mold hole has a corner portion,
Having the through slit extending from the corner of the hole of the die mold as a starting point,
The die for a punch press according to any one of claims 7 to 10 , characterized in that: A die for a punch press according to any one of claims 7 to 11 ,
The non-penetrating grooves or through slits are combined so that each die edge portion divided by the through slit bends uniformly.
A die for a punch press machine.

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