JP2016055312A - Press die, press working machine and pressed component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to reliably correct a curve which is generated by press working.SOLUTION: A press die 14 of a press working machine 13 is equipped with: a die 20; a punch 21 which is so provided as to relatively approach and be separated from the die 20; a curve correction part 25 which is provided on the die 20 and corrects a curve of a metal plate 15 which is pressed between the die 20 and the punch 21. The curve correction part 25 is equipped with: plural split bodies 26 (26A to 26C) formed in such a manner that the die 20 is split in a plane orthogonal to an approach/separation direction Z between the die 20 and the punch 21; and a shim 22 which positionally adjusts each of the plural split bodies 26A to 26C along the approach/separation direction Z in which the die 20 and the punch 21 approach and are separated from each other.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a press die, a press machine, and a press part.

  Conventionally, various press parts are manufactured by pressing a metal plate such as an iron plate, a steel plate, an aluminum plate, and a phosphor bronze plate using a press die. Examples of the pressing method include shearing, bending, and drawing. Manufacture of pressed parts is performed while appropriately selecting or combining the respective pressing methods.

  In addition, when manufacturing a press part using a so-called progressive die, for example, for a band-shaped metal plate, after first performing the formation of a drawn portion by drawing or the formation of a through hole by shearing, Punching along the outer shape by shearing. As described above, a press working machine using a progressive die manufactures a pressed part by sequentially performing a plurality of times of processing on a band-shaped metal plate.

  By the way, when a metal plate is pressed, there is a problem that warpage occurs in the pressed part due to residual stress generated in the pressed part. Therefore, a method has been proposed in which unevenness is added to the material of the metal plate in advance to suppress the occurrence of warpage in the pressed part (see, for example, Patent Document 1).

JP 2006-35245 A

  However, the residual stress generated in the pressed part varies depending on factors such as the number and size of holes formed by shearing, the arrangement, the curvature of bending, the drawing depth of drawing, and the like. Furthermore, even if the press parts have the same shape, the degree of occurrence of residual stress may vary depending on the material production lot.

  Then, this invention is in view of the said situation, Comprising: It is providing the press metal mold | die, press processing machine, and press component which can correct | amend the curvature which arises by press work reliably.

  In order to solve the above-described problems, a press die according to the present invention includes a first die, a second die provided so as to be relatively close to and away from the first die, and the first die. A warp correction portion that is provided on one of the mold and the second mold and corrects a warp of a workpiece to be pressed between the first mold and the second mold, and the warp The correction unit includes a plurality of divided bodies obtained by dividing the first mold or the second mold into a plurality of parts within a plane intersecting the contact / separation direction of the first mold and the second mold. A position adjustment unit that adjusts the position of each of the divided bodies along the contact / separation direction is provided.

  According to the present invention, by adjusting the position of each of the plurality of divided bodies along the contact / separation direction in which the first mold and the second mold are in contact with each other, the workpiece is plastically deformed to cause residual stress. Can be made uniform. In this way, it is possible to correct the warp according to the warp situation of the workpiece.

  Moreover, the convex part is formed in the opposing surface of the said division body, It is characterized by the above-mentioned.

  According to the present invention, it is possible to increase the stress acting on the workpiece and increase the warp correction force by the convex portion. Thereby, the curvature correction of a workpiece can be performed effectively.

  Moreover, the press machine of this invention is provided with the above-mentioned press die.

  ADVANTAGE OF THE INVENTION According to this invention, the curvature correction according to the condition of the curvature of a workpiece can be performed.

  The press machine according to the present invention includes a base material supply unit that feeds out a belt-shaped base material, and a stage that is provided in plural along the feeding direction of the base material and performs predetermined processing on the base material. The press mold is provided on the stage at the end in the feeding direction.

  In general, when a plurality of stages of processing are performed through a plurality of stages, the state of residual stress of the base material sequentially changes. On the other hand, according to the present invention, the warp can be corrected efficiently and reliably at one time by performing the warp correction at the stage at the end in the feed direction.

  The press part of the present invention is characterized by being formed by the above-described press die.

  ADVANTAGE OF THE INVENTION According to this invention, the press component by which curvature was correct | amended reliably can be provided.

  According to the present invention, by adjusting the position of each of the plurality of divided bodies along the contact / separation direction in which the first mold and the second mold are in contact with each other, the workpiece is plastically deformed to cause residual stress. Can be made uniform. In this way, it is possible to correct the warp according to the warp situation of the workpiece.

It is a schematic diagram of the progressive die press unit of this embodiment. It is a top view which shows an example of the press components press-processed with a press machine. It is sectional drawing which shows schematic structure of the press die with which the terminal stage in the feed direction was equipped. It is a figure which shows the division body which comprises the curvature correction part of the 1st modification of embodiment. It is a figure which shows the division body which comprises the curvature correction part of the 2nd modification of embodiment. It is a figure which shows the division body which comprises the curvature correction part of the 3rd modification of embodiment. It is a figure which shows the division body which comprises the curvature correction part of the 4th modification of embodiment. It is a figure which shows the division body which comprises the curvature correction part of the 5th modification of embodiment. It is a figure which shows the division body which comprises the curvature correction part of the 6th modification of embodiment.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram of a progressive press unit according to the present embodiment.
As shown in FIG. 1, the press unit 10 includes an uncoiler (corresponding to “base material supply unit” in the claims) 11, a leveler feeder 12, and a press machine 13.

  The uncoiler 11 is an apparatus for unwinding the metal plate 15 from the coil 16 formed by winding the strip-shaped metal plate 15 (corresponding to “working object, base material” in claims) before press working. The leveler feeder 12 is an apparatus for supplying the press machine 13 with the metal plate 15 unwound by the uncoiler 11. The leveler feeder 12 sends out the metal plate 15 by a length corresponding to one stage of a press die 14 to be described later for each press operation (up and down movement) in the press machine 13.

  The press machine 13 has a plurality of stages S1 to Sf. Sf indicates a stage located at the end in the feeding direction of the metal plate 15. The plurality of stages S1 to Sf are divided into a plurality along the feed direction of the metal plate 15 and are provided at regular intervals.

  Each of the stages S1 to Sf is provided with a press die 14. The press mold 14 includes a die 20 disposed below (corresponding to a “first mold” in the claims) and a punch 21 disposed in opposition to the die 20 (“second mold in the claims”). Equivalent to “type”).

The press machine 13 includes a bolster 13a on which a die 20 of a press mold 14 of a plurality of stages S1 to Sf is set, and a slide 13b on which punches 21 of a press mold 14 of a plurality of stages S1 to Sf are set. And.
The slide 13b is driven in the vertical direction by a drive mechanism (not shown). As a result, the press dies 14 of the plurality of stages S1 to Sf are driven in the direction Z in which the die 20 and the punch 21 come in contact with and away from each other, and are pressed between the die 20 and the punch 21. The metal plate 15 is pressed.
Here, in the press machine 13, the shapes of the die 20 and the punch 21 of the press die 14 are different in each of the plurality of stages S1 to Sf. As a result, in the press machine 13, for example, shearing, bending, drawing, and the like are performed on the metal plate 15 while the metal plate 15 is sequentially fed. The press component 1 is formed by sequentially performing predetermined press processing on the metal plate 15 by the press machine 13.

FIG. 2 is a plan view showing an example of a press part that is pressed by the press machine of the press unit of this embodiment.
As shown in FIG. 2, the press part 1 is formed by sequentially performing predetermined press processing on the metal plate 15 by a press machine 13.
Here, the press component 1 of the embodiment is a date dial holder that holds a date dial incorporated in a timepiece such as a mechanical timepiece or a quartz timepiece, and is formed in a disk shape. Specifically, the press component 1 includes a disk-shaped substrate 2, a plurality of functional portions 3 formed on the substrate 2, a plurality of fixing holes 4 for fixing the press component 1 to an attachment member (not shown), Are integrally formed. The function part 3 is a hole or shape that is important for the function of incorporating the date indicator press as the press part 1 into the watch, and is formed in a state of being positioned with respect to a desired position of the substrate 2. .

  The press machine 13 presses the terminal stage Sf in the feed direction of the metal plate 15 among the plurality of stages S1 to Sf (see FIG. 1) in order to suppress the occurrence of warping of the press part 1 as described above. The mold 14f includes a warp correction portion 25.

FIG. 3 is a cross-sectional view showing a schematic configuration of a press die provided in a terminal stage in the feed direction.
As shown in FIG. 3, in the press die 14f of the terminal stage Sf, the die 20 is provided in a die holding member 23 having a die holding hole 23h having a square shape in plan view, for example, and the die holding hole 23h. And a die body 24.

  The die body 24 is configured by combining a plurality of divided bodies 26 divided in a plane orthogonal to the contact / separation direction Z between the die 20 and the punch 21. In this embodiment, the die body 24 includes a divided body 26A that is divided in half in the direction along the side 23x of the die holding hole 23h, and the other half of the die body 24 that is orthogonal to the side 23x of the die holding hole 23h. A divided body 26B and a divided body 26C that are further divided in half in the direction along the side 23y are provided.

  On each opposing surface 26f of each of the divided bodies 26A, 26B, and 26C, a processing portion (not shown) that performs predetermined processing such as shearing, bending, and drawing, and a convex portion 27 that corrects the warp of the metal plate 15 are provided. Is formed. As the convex portion 27, for example, a plurality of protrusions 28 intersecting at a predetermined angle can be formed by so-called knurling. Here, the height of the convex part 27 is preferably 20 to 30 μm, for example.

The positions of the divided bodies 26 </ b> A, 26 </ b> B, and 26 </ b> C can be adjusted in the die holding hole 23 h of the die holding member 23 along the contact / separation direction Z in which the die 20 and the punch 21 contact and separate. In order to adjust the position of the divided bodies 26A, 26B, and 26C, for example, a shim 22 (claimed) is provided between the bottom 23b of the die holding hole 23h and the lower surface of each of the divided bodies 26A, 26B, and 26C. Equivalent to “position adjustment part” in the section). By preparing a plurality of types of thicknesses of the shim 22 and exchanging them as appropriate, it is possible to adjust the projecting dimension toward the punch 21 in the contact / separation direction Z of the facing surface 26f of the divided bodies 26A, 26B, 26C. ing.
As described above, the warp correction unit 25 of the present embodiment includes the plurality of divided bodies 26 </ b> A, 26 </ b> B, 26 </ b> C and the shim 22.

  In the manufacturing method of the press part 1 of this embodiment, the metal plate 15 unwound from the coil 16 by the uncoiler 11 is supplied to the press machine 13 by the leveler feeder 12. The metal plate 15 supplied to the press machine 13 is moved by one stage for each press operation, and is pressed in each press die 14 of the stages S1 to Sf.

Then, at the terminal stage Sf in the feeding direction of the metal plate 15, the slide 13b of the press machine 13 descends, and a predetermined press process is performed on the metal plate 15 between the die 20 and the punch 21 of the press die 14f. In addition, the warp correction process is performed. Specifically, the opposing surfaces 26f of the plurality of divided bodies 26A, the divided bodies 26B, and the divided bodies 26C constituting the die main body 24 abut on the surface 15f on the side facing the die 20 in the metal plate 15. As a result, the metal plate 15 is pressed between the punch 21 and the facing surface 26f, so that predetermined processing such as shearing, bending, or drawing is performed. In addition, the metal plate 15 is pressed between the punch 21 and the convex portion 27 formed on the facing surface 26f, whereby the convex portion 27 presses the metal plate 15 to cause plastic deformation, and the metal plate 15 Warping is corrected by making the residual stress uniform.
The metal plate 15, that is, the pressed part 1 is discharged from the press machine 13 after the press work by the terminal stage Sf in the feed direction.

By the way, when the warp correction is performed by the press die 14f of the terminal stage Sf as described above, the press unit 10 is experimentally operated in advance, and a series of press processing is performed by the press machine 13 using the stages S1 to Sf. The amount of warpage of the pressed part 1 when the above is applied to the metal plate 15 is measured. The amount of warpage can be measured by placing a pressed part 1 that has undergone a series of press work on a surface plate or the like, and measuring it with a scale, or using a three-dimensional measuring instrument or an optical measuring instrument. May be. The measurement of the warpage amount in the pressed part 1 is preferably performed every time the type (product number) of the pressed part 1 or the production lot of the metal plate 15 is different.
And the protrusion dimension to the punch 21 side in the contact-and-separation direction Z is adjusted with the shim 22 etc. about the opposing surface 26f of the division body 26A-division body 26C according to the measured curvature amount. At this time, the regions 26A, 26B, and 26C may be retracted downward in the direction away from the punch 21 so as not to come into contact with the press part 1 for the region that does not require warp correction.

The press die 14 of the press machine 13 described above includes a warp correction unit 25 that is provided on the die 20 and corrects the warp of the metal plate 15 pressed between the die 20 and the punch 21. The warp correction unit 25 includes a divided body 26A to a divided body 26C obtained by dividing the die 20 into a plurality of pieces within a plane orthogonal to the contact / separation direction Z between the die 20 and the punch 21, and a plurality of divided bodies 26A to 26C. Each of these is provided with a shim 22 that adjusts the position along a contact / separation direction Z in which the die 20 and the punch 21 contact and separate.
By configuring in this way, the position of each of the plurality of divided bodies 26A to 26C is adjusted along the contact / separation direction Z in which the die 20 and the punch 21 are in contact with and separated from each other. It is possible to make the residual stress uniform by plastically deforming the plate 15. In this way, it is possible to surely correct the warpage generated in the pressed part 1 by the press working.

  Moreover, since the convex part 27 is formed in the opposing surface 26f of the division body 26, the stress which acts on the metal plate 15 by the convex part 27 can be raised, and the curvature correction force can be raised. Thereby, the curvature correction of the metal plate 15 can be performed effectively.

  Further, in the press machine 13, the press die 14 f provided with the warp correction unit 25 is provided at the terminal stage Sf in the end in the feeding direction of the metal plate 15. In the press machine 13, the residual stress state of the metal plate 15 is sequentially changed by performing a plurality of stages of processing through a plurality of stages S1, S2,. On the other hand, according to this embodiment, it is possible to efficiently correct the warp of the press part 1 at a time by performing the warp correction at the terminal stage Sf in the feed direction.

(First modification of embodiment)
Next, modifications of the above embodiment will be described. In the above-described embodiment, the die body 24 of the warp correction unit 25 is divided into three parts 26A, 26B, and 26C. However, for example, the following modifications may be adopted. .
4A and 4B are diagrams showing a divided body constituting a warp correction portion of a press die as a first modification of the embodiment of the present invention, wherein FIG. 4A is a plan view and FIG. 4B is a perspective view. .
As shown in FIG. 4, the die body 24 of the warp correction unit 25 may be composed of divided bodies 26D and 26E that are divided into two halves in the direction along one side 23x of the die holding hole 23h.

(Second modification of the embodiment)
5A and 5B are diagrams showing a divided body constituting a warp correction portion of a press die as a second modification of the embodiment of the present invention, wherein FIG. 5A is a plan view and FIG. 5B is a perspective view. .
As shown in FIG. 5, the die body 24 of the warp correction section 25 is divided into two halves in the direction along the one side 23x and the other side 23y of the die holding hole 23h, and divided into a total of four divided bodies 26F and 26G. , 26H, 26J.

(Third Modification of Embodiment)
FIGS. 6A and 6B are diagrams showing a divided body constituting a warp correction portion of a press die as a third modification of the embodiment of the present invention, wherein FIG. 6A is a plan view and FIG. 6B is a perspective view. .
As shown in FIG. 6, the die main body 24 and the die holding hole 23 h of the warp correction portion 25 may be circular in a plan view. The die body 24 may be composed of divided bodies 26K, 26L, and 26M divided into, for example, three parts in the circumferential direction. Of course, in addition to this, the die body 24 may be divided into two parts in the circumferential direction, or four or more parts.

(Fourth modification of the embodiment)
7A and 7B are diagrams showing a divided body constituting a warp correction portion of a press die as a fourth modification of the embodiment of the present invention, wherein FIG. 7A is a plan view and FIG. 7B is a perspective view. .
As shown in FIG. 7, the die main body 24 of the warp correction portion 25 is divided into two parts, an outer peripheral side and an inner peripheral side, and a circular hole 29a is formed in the central part of the outer peripheral side divided body 26N. Alternatively, the inner circumferential side divided body 26P may be inserted and arranged.
According to such a configuration, it is possible to correct warpage between the central portion and the outer peripheral side of the metal plate 15 (pressed part 1).

(Fifth Modification of Embodiment)
FIGS. 8A and 8B are diagrams showing a divided body constituting a warp correction portion of a press die as a fifth modification of the embodiment of the present invention, wherein FIG. 8A is a plan view and FIG. 8B is a perspective view. .
As shown in FIG. 8, the die main body 24 of the warp correction portion 25 has holes 29b and 29c formed in a plurality of locations, for example, two locations on the inner peripheral portion of the outer divided portion 26Q, and the holes 29b and 29c have inner portions. The circumferential-side divided bodies 26R and 26S may be inserted and arranged.
According to such a configuration, the warp correction can be locally performed on the inner peripheral side of the metal plate 15 (pressed part 1) by the divided bodies 26R and 26S.

(Sixth Modification of Embodiment)
FIGS. 9A and 9B are diagrams showing a divided body constituting a warp correction portion of a press die as a sixth modification of the embodiment of the present invention, wherein FIG. 9A is a plan view and FIG. 9B is a perspective view. .
As shown in FIG. 9, the die body 24 of the warp correction portion 25 is divided into an outer peripheral side and an inner peripheral side, and a square hole 29d is formed in the central portion of the outer peripheral side divided body 26T having a circular cross section. The inner circumferential side divided body 26U may be inserted and arranged in the hole 29d.
Even with such a configuration, it is possible to correct warpage between the central portion and the outer peripheral side of the metal plate 15 (pressed part 1).

  The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.

For example, in the above-described embodiment, the press unit 10 is a progressive type in which press processing is sequentially performed by the plurality of stages S1 to Sf while feeding the metal plate 15, but the present invention is not limited thereto. For example, only one set of pressing dies 14 may be used to perform predetermined pressing and warping correction by only one processing.
Further, in the press die 14f of the terminal stage Sf, only the warp correction may be performed without performing the pressing process.

The convex portion 27 may have any shape, and may have other shapes such as a hemispherical shape.
Furthermore, it is good also considering the opposing surface 26f of the division body 26 as planar shape, without providing the convex part 27. FIG.

Moreover, in the said embodiment, although the curvature correction part 25 was provided in the die | dye 20 side, you may make it provide in the punch 21 side.
Furthermore, in the warp correction unit 25, the amount of protrusion of the plurality of divided bodies 26 toward the punch 21 is adjusted by the shim 22, but a screw-type adjustment mechanism or the like may be provided as the position adjustment unit. . Further, as the position adjusting unit, the amount of protrusion of the plurality of divided bodies 26 toward the punch 21 may be adjusted by an actuator or the like. In this case, the amount of protrusion of the plurality of divided bodies 26 toward the punch 21 may be automatically adjusted by an actuator in accordance with the type of the pressed part 1 to be processed.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Press part 11 ... Uncoiler (base material supply part) 13 ... Press processing machine 14f ... Press die 15 ... Metal plate (work object, base material) 20 ... Die (1st metal mold | die) 21 ... Punch (2nd metal mold | die) 22 ... Shim (position adjustment part) 25 ... Warpage correction part 26 (26A-26U) ... Divided body 27 ... Convex Part S1-Sf ... Stage Sf ... Terminal stage

Claims (5)

The first mold,
A second mold provided so as to be relatively close to and away from the first mold;
A warp correction portion that is provided on one of the first mold and the second mold and corrects a warp of a workpiece to be pressed between the first mold and the second mold; Prepared,
The warp correction part is
A divided body obtained by dividing the first mold or the second mold into a plurality of parts in a plane intersecting the contact / separation direction of the first mold and the second mold;
A press die, comprising: a position adjusting unit that adjusts the position of each of the plurality of divided bodies along the contact / separation direction.   The press die according to claim 1, wherein a convex portion is formed on the opposing surface of the divided body.   A press working machine comprising the press die according to claim 1. A base material supply unit for feeding a belt-shaped base material;
A plurality of stages are provided along the feeding direction of the base material, and each stage performs predetermined processing on the base material,
The press machine according to claim 3, wherein the press die is provided on the stage at the end in the feeding direction.   A press part formed by the press die according to claim 1.

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