JP2015174113A - Press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press device that can eliminate a step for processing burrs developed when cutting a workpiece and thereby reduce costs according to reduction of the burr processing step, in carrying out trimming and piercing of the workpiece in a press process.SOLUTION: A press device comprises: a lower die 1 having a support surface 101 for supporting a workpiece w, and a first bending blade 110; a first cutting blade 120 provided on the lower die, and disposed continuously on a fixed compression surface 102 formed separated from the support surface like a step; an upper die 2 provided opposite to the lower die, and having a movable compression surface 201 for pressing the workpiece and a second bending and cutting blade 26 which is disposed continuously on the movable compression surface 201 to bend and then cut the workpiece; a protruding part 202 provided on the upper die and separated rearward from the second bending and cutting blade 26 by a prescribed amount h1 in a press direction to protrude as a step, and formed separated from the first bending blade 110 by a thickness t or more of the workpiece; and the movable compression surface 201 formed on the protruding part to press the cut workpiece in cooperation with the fixed compression surface 102.

Description

  The present invention relates to a press device, and more particularly, to a press device that punches and cuts a sheet metal material and performs a flange bending process.

2. Description of the Related Art Conventionally, in order to reduce cycle time, a press machine that performs punching and flange bending on a workpiece (workpiece) with a single press machine is known.
This press machine has a lower mold curved blade fixed to the lower mold, and a movable cushion having a lower mold cutting blade supported on the lower mold by being biased in the upward movement direction by a spring at a position apart from the lower mold curved blade. With. In addition, the upper die is integrally formed with a cutting blade that enters the gap between the lower die cutting blade and the lower die cutting blade and cuts the sheet metal with the lower die cutting blade, and a curved blade that is bent with the lower die bending blade. The structure which provided the curved blade and cutting blade to take is taken (for example, patent document 1).

  In such a press, the movable cushion that supports the lower die edge is supported on the lower die by a spring, and the lower die edge of the movable cushion is subject to floating displacement, making it impossible to cut the sheet metal at a fixed position. There is. In view of this, an apparatus has been proposed in which the movable cushion is supported by a guide pin protruding from the lower mold so as to be movable up and down, thereby suppressing the swing of the lower mold cutting blade and cutting the sheet metal at a fixed position. (For example, Patent Document 2).

Japanese Utility Model Publication No. 61-97320 No. 3-9858

By the way, in Patent Documents 1 and 2, it is possible to cut a part of a sheet metal panel during one press step and further form a flange by trimming a cutting terminal. It is possible to cut the sheet metal at.
However, there is a case where burrs are generated at the cutting portion at the tip of the flange during the trim processing. If such a burr is left as it is, it will cause problems such as cutting a finger when touched by hand.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and an object of the present invention is to eliminate a burr processing step that occurs at the time of cutting when cutting, trimming, and piercing a sheet metal panel in a single pressing step in a press device. It is possible to provide a press apparatus that can reduce costs by shortening the burr process.

The present invention has the following configuration in order to achieve the above object.
The press device according to the first aspect of the present invention includes a lower die having a support surface for supporting a workpiece and a bending blade provided to form a continuous surface on the support surface, and the support surface provided on the lower die. A cutting blade provided continuously on a fixed pressure surface formed stepwise in a direction perpendicular to the pressing direction at a predetermined distance from the front of the pressing direction, and movable relative to the lower die in the pressing direction. A movable pressure surface that presses the workpiece to be supported and supported by the support surface, and the cutting blade that is provided continuously with the movable pressure surface and bends the workpiece in cooperation with the bending blade. An upper die having a bending blade and a cutting blade that cuts in cooperation with each other, and a stepped shape in a direction perpendicular to the pressing direction, separated from the movable pressing surface by a predetermined amount behind the movable pressing surface. Protruding and formed away from the bending blade by more than the thickness of the workpiece Comprising the a protrusion, and a movable pressing surface for pressing in cooperation with the fixed pressing surface of the workpiece after the formed cut into the protrusion.

  A second aspect of the present invention is the pressing device according to the first aspect, wherein the bending blade, the cutting blade, the bending blade-cum-cutting blade, the movable pressure surface, and the fixed pressure surface each form a straight shape. However, they are arranged opposite to each other in parallel.

  Invention of Claim 3 is a press apparatus of Claim 1, Comprising: The said bending blade, the said cutting blade, and the said bending blade and cutting blade comprise circular shape, respectively, and the said protruding part and the said movable part The pressurizing surface and the fixed pressurizing surface each form an annular shape, and are respectively concentrically opposed to each other.

  According to the first aspect of the present invention, after the workpiece bent by the second bending blade / cutting blade moving in the pressing direction in cooperation with the bending blade is cut in cooperation with the cutting blade, the workpiece after cutting is cut. In the step of pressurizing the movable pressure surface and the fixed pressure surface in cooperation, even if burrs are generated on the workpiece after cutting, it can be removed by frictionally compressing the ends of the burrs.

  In the invention of claim 2, the bending blade / cutting blade moving in the pressing direction bends the workpiece into a straight shape in cooperation with the bending blade, and then cuts into a straight shape in cooperation with the cutting blade. Then, the cut workpiece is bent so as to form a straight bent portion in cooperation with the bending blade, and the extending side of the bent portion is bent and pressed in cooperation with the movable pressing surface and the fixed pressing surface. Thus, a straight bent portion can be formed.

  In the invention of claim 3, the bending blade / cutting blade moving in the press direction bends the workpiece in a circular shape in cooperation with the bending blade, and then cuts and opens the through hole in cooperation with the cutting blade. Next, the workpiece with the through hole opened is bent in the diameter increasing direction so that the projecting portion and the bending blade cooperate to form an annular bent portion, and the extending side of the annular bent portion is movable. An annular bent portion can be formed by bending and pressurizing the pressing surface and the fixed pressing surface in cooperation.

It is principal part structure sectional drawing at the time of the mold opening of the press apparatus of one Embodiment of this invention. It is principal part structure sectional drawing at the time of the mold clamping of the press apparatus of FIG. FIG. 2 is an operation explanatory view of the press apparatus of FIG. 1, (a) shows a clamping position, (b) shows a bending position, and (c) shows a mold clamping position. 1A is a schematic cross-sectional view taken along line AA of the press apparatus of FIG. 1, and FIG. 1B is a side cross-sectional view of a molded rectangular steel material. It is a partial expanded sectional view of the up-and-down type | mold in the clamping position of the press apparatus of FIG. FIGS. 2A and 2B are operation explanatory views of the press device of FIG. 1, in which FIG. 1A is a partially enlarged sectional view of an upper and lower mold in a bending position, and FIG. FIG. 2 is an operation explanatory view of the pressing device of FIG. 1, (a) is an enlarged perspective view of a main part at a clamping position, (b) is a perspective view in a state of bending and cutting a workpiece, and (c) is a cut portion. It is an expansion expansion perspective view. FIG. 2 is an operation explanatory view of the press apparatus of FIG. 1, (a) is an enlarged perspective view of a main part in a state of starting pressurization after cutting, (b) is an enlarged perspective view of a cutting portion, and (c) is an added perspective view after cutting. FIG. 3D is an enlarged perspective view of a main part in a pressure completion state, and FIG. The principal part schematic plan view of the press apparatus of other embodiment of this invention is shown to (a), (b) shows the principal part sectional side view for function description of a press apparatus.

A press apparatus to which the present invention is applied will be described.
In short, the press apparatus to which the present invention is applied is a method in which trimming and piercing of a workpiece are performed in one press process, and burrs generated at a cut end portion by cutting prior to flange molding are reduced during the pressurizing process. The pressure surface is removed by friction and compression. As a result, the feature is to remove burrs.
The characteristics of the present invention will be mainly described in the case of trim processing using the following embodiments and modifications. In addition, about embodiment, a modification, etc., about the components, such as a member and a component which have the same function or shape, the subsequent description is abbreviate | omitted by attaching | subjecting the same code | symbol as much as possible.

Here, the press position of the present invention will be described as a first embodiment.
As shown in FIG. 1, the press apparatus M according to the first embodiment performs trim processing on a steel plate w that is a workpiece (workpiece). The pressing device M includes a lower mold mechanism 10 having a lower mold 1 disposed on the lower side of the steel plate w, and an upper mold mechanism 20 having an upper mold 2 disposed on the upper side of the steel plate w. Furthermore, a lifting mechanism 30 that relatively moves the lower mold mechanism 10 and the upper mold mechanism 20 in the press direction X along the center line Lc, and a control device 40 that controls the lifting mechanism 30 via a hydraulic circuit (not shown). Have.

In response to the press command, the control device 40 applies the upper mold 2 supported by the upper mold holder 21 of the upper mold mechanism 20 to the lower mold 1 supported by the lower mold holder 11 of the lower mold mechanism 10 disposed opposite to the mold opening position P0. On the other hand, the outer portion of the steel plate w is trimmed by performing advance / retreat control.
The press apparatus 1 arrange | positions the base E on the floor in which this is installed. The lower die 1 is installed on the base E via the lower holder 11, and the upper surface of the lower die 1 is provided so as to contact the lower surface of the steel plate w and to form a continuous surface with the support surface 101. A first bending blade 110 which is a bent blade is provided.

  The lower mold 1 is separated from the support surface 101 by a predetermined amount h1 along the pressing direction X in the forward direction of travel (downward in FIG. 1), that is, by a predetermined amount h1 ahead of the pressing direction and perpendicular to the pressing direction X. A fixed pressing surface 102 is formed in a step shape (horizontal direction in FIG. 1). A first cutting blade 120 that is a cutting blade is provided on the fixed pressure surface 102 continuously.

  The upper mold mechanism 20 is supported by an elevating mechanism 30 supported by a support frame (not shown). The upper mold mechanism 20 includes an upper holder 21 that is disposed along the same center line Lc as the lifting mechanism 30 and is lifted and lowered by the lifting mechanism 30 and an upper mold 2 that is integrally supported by the upper holder 21. Further, the upper mold mechanism 20 includes a pad 25 supported by an upper mold holder 21 and protruding downward and biased by a coil spring 24 and connected to the upper mold 2 by a movable pin 23 so as to be relatively movable.

The pad 25 cooperates with the support surface 101 of the lower mold 1 and can hold the steel plate w without deviation. The movable pin 23 is loosely fitted in a through hole 211 provided continuously to the upper holder 21 and the upper mold 2 and is connected so as not to be detached by a stopper 231 provided at an end portion.
The upper mold 2 is arranged in parallel in two left and right rows (perpendicular to the plane of the drawing), and a movable pressing surface 201 is formed in which the lower surface abuts on the upper surface of the steel plate w that is a workpiece and presses the steel plate w downward. Furthermore, the movable pressure surface 201 is provided continuously with a step, and in cooperation with the first cutting blade 120 after bending the steel plate w (workpiece) in cooperation with the first bending blade 110. A second bending blade / cutting blade 26 which is a single bending blade / cutting blade for cutting the steel sheet w is integrally formed.
In addition, the 1st bending blade 110, the 1st cutting blade 120, the 2nd bending blade and cutting blade 26, the movable pressurization surface 201, and the fixed pressurization surface 102 each comprise a straight shape, and are mutually opposingly arranged in parallel.

The operation of such a press apparatus M will be described. First, in the stage before the pressing process, a rectangular steel plate w is placed on the lower mold 1 of the pressing apparatus M in the mold open state as shown in FIG. At this time, the rectangular steel plate w is positioned by contacting a positioning member (not shown) supported on the lower holder 11 side.
Next, the control device 40 that has received the drive command controls the lifting mechanism 30 by pressing. First, the movable upper mold 2 descends from the mold opening position (standby position) P1, and the pad 25 holds the steel plate w in cooperation with the support surface 101 of the lower mold 1 (see FIG. 2). The mold 2 reaches a clamping position P1 where it contacts the steel plate w (see FIGS. 3A and 7A).

  Next, as shown in FIG. 2, the upper die 2 is lowered from the clamping position P1, and the left and right ends of the steel plate w are bent and displaced in cooperation with the first bending blade 110 (FIG. 3 (b), FIG. 6 ( Next, the left and right end portions of the steel plate w come into contact with the first cutting blade 120 and cut (see FIGS. 7B and 7C). At this time, as shown in FIG. 6 (a), the first cutting edge 120 is positioned a predetermined amount h1 ahead of the support surface 101 in the pressing direction X, and the flange has an inclination width f1 at the time of bending displacement of the predetermined amount h1. The part fw is cut (see FIGS. 8A and 8B). As shown in FIG. 6B, the flange portion fw is further pressed downward by a projecting portion 202 having a movable pressure surface 201 of the upper mold 2. Here, the projecting portion 202 is provided on the upper mold 2 and is separated from the second bending blade / cutting blade 26 by a predetermined amount h1 rearward in the pressing direction, protrudes in a step shape, and covers the first bending blade 110. It is formed apart from the thickness of the steel plate w which is a processed material.

Here, as shown in FIGS. 6A and 6B, the flange portion fw after the end portion is cut is a gap t1 (workpiece) between the side wall surface of the first bending blade 110 and the side wall surface of the protruding portion 202. The pressure is moved to a gap of at least the thickness t. Note that the pressing operation position is set so that the protruding portion 202 is pressed away from the side wall of the first bending blade 110 by a thickness t or more of the steel plate w (workpiece).
For this reason, as the flange portion fw enters the gap t, the tip end portion thereof is inclined and rubs against the fixed pressure surface 102 in a pressed state, and moves to the side wall side of the first bending blade 110. At this time, the cut surface at the tip of the flange portion fw is bent and pressed by the fixed pressure surface 102 and the movable pressure surface 201, and the flange portion wf1 is formed (see FIGS. 8C and 8D). At the same time, even if burrs v (see FIG. 8B) are generated at the front end, which is the cut end of the flange fw, the front end is inclined and rubbed against the fixed pressure surface 102 at the initial stage of pressurization. Then, the burrs v are eliminated or crushed by pressurization, and the burrs v at the protruding edge of the flange portion wf1 are removed.

Thereafter, the elevating mechanism 30 switches the pressing direction X to the backward direction and returns to the mold opening position (retreat position) P1. Furthermore, as shown in FIG. 4 (b), the steel plate w in which the left and right ends are formed with the flange w with the flange portion wf1 by trimming is taken out of the machine as a processed product, and a section generated by the trim processing. And Bali is excluded.
In such a pressing device M, when the upper die 2 is moved in the pressing direction X, the second bending blade / cutting blade 26 cooperates with the first bending blade 110 to place the steel plate w as a workpiece. A fixed amount h1 is bent, and then cut in cooperation with the first cutting edge 120. After that, the process enters a step of pressing the cut steel plate w in cooperation with the movable pressing surface 201 and the fixed pressing surface 102. Here, as shown in FIGS. 8A and 8B, even if burrs are generated at the cut end of the flange portion fw of the steel plate w after cutting, the ends of the burrs are pressed against the fixed pressure surface 102 and subjected to friction. And can be removed by compression.

  In particular, in the press apparatus M of FIG. 1, each of the second bending blade / cutting blades 26 at the left and right ends of the upper mold 2 moving in the pressing direction X cooperates with the first bending blade 110 to form a rectangular steel plate w (FIG. 4). The left and right ends of the rectangular steel plate w are cut into a straight shape in cooperation with the first cutting blade 120. Further, the flange portion fw (first bent portion) with the straight flange portion wf1 (second bent portion) can be bent at the left and right ends of the cut steel plate w. Moreover, the straight flanges wf1 at the left and right ends can eliminate burrs, shorten or eliminate the deburring process, and the cost reduction effect of the product can be obtained.

  1, the right and left ends of the rectangular steel plate w are cut into a straight shape, and as shown in FIG. 4B, the straight flange fw <b> 1 (second shape) is formed at the left and right ends as shown in FIG. The flange part fw (first bent part) with the bent part) is trimmed into an appropriate shape. Instead, as shown in FIGS. 9A and 9B, a disk-shaped press product wac may be trimmed and molded from a rectangular steel plate wa. In this case, the other components have the same functional units, and redundant description is omitted. Here, in particular, the pressing device Ma as the second embodiment for trimming the flange portion fwa (first bent portion) with the flange portion fw1a (second bent portion) at the peripheral portion into an appropriate shape may be configured. .

  In this case, the press device Ma is configured so that the first bending blade 110a, the first cutting blade 120a, and the second bending blade / cutting blade 26a have a circular shape as compared with the pressing device M of the first embodiment. It is formed. In addition, the projecting portion 202a, the movable pressure surface 201a, and the first pressure surface 102a are formed in an annular shape, and these members are concentric with each other about a center line Lc extending in the press direction X. Adopting a configuration that faces each other. In this case, it is possible to trim the flange portion fwa (first bent portion) with the flange portion fw1a (second bent portion) having an annular shape at the peripheral edge portion of the disk-shaped press product wa1 into an appropriate shape. Moreover, as with the press device of the first embodiment, the press device Ma as the second embodiment can eliminate burrs from the tip of the annular flange fw1a, shorten or eliminate the deburring process on the outer periphery of the product, Product cost reduction effect can be obtained.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments, and the present invention described in the claims is not specifically limited by the above description. Various modifications and changes are possible within the scope of the above.
For example, the molded product of the press device to which the present invention is applied is not limited to the above-mentioned type, but can be applied to other types, for example, a polygonal steel plate molded product other than a quadrangular shape. It may be applied to trimming and piercing. The effects described in the embodiments of the present invention only list the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention. Absent.

DESCRIPTION OF SYMBOLS 1 Lower mold | type 2 Upper mold | type 101 Support surface 102 Fixed pressure surface 110 1st bending blade 120 1st cutting blade 201 Movable pressure surface 202 Projection part 26 2nd bending blade and cutting blade h1 Predetermined amount f1 Inclination width fw, fwa ridge part (First bent part)
fw1, fw1a flange portion (second bent portion)
t Thickness of work material t1 Clearance v Burr w Steel plate (work material)
fw Flange part fw1 ridge part M, Ma Press device X Press direction

Claims (3)

A lower mold having a support surface for supporting a workpiece and a first bending blade provided to form a continuous surface on the support surface;
A first cutting blade provided on the lower die and continuously provided on a fixed pressure surface formed in a step shape a predetermined amount away from the support surface in the press direction;
A movable pressure surface that presses the workpiece against the lower mold so as to be relatively movable in the press direction, and is continuously provided on the movable pressure surface, in cooperation with the first bending blade, the workpiece. An upper die having a second bending blade / cutting blade for cutting in cooperation with the first cutting blade
It is provided in the upper mold and protrudes a predetermined amount away from the second bending blade / cutting blade to the rear in the pressing direction, and is formed apart from the first bending blade by the thickness of the workpiece. A protruding portion,
A pressing device comprising: a movable pressing surface that is formed on the projecting portion and presses the cut workpiece in cooperation with the fixed pressing surface. The press device according to claim 1,
The first bending blade, the first cutting blade, the second bending blade / cutting blade, the movable pressure surface, and the fixed pressure surface each form a straight shape, and are arranged opposite to each other in parallel. Press machine. The press device according to claim 1,
The first bending blade, the first cutting blade, and the second bending blade / cutting blade each have a circular shape, and the protruding portion, the movable pressure surface, and the fixed pressure surface each have an annular shape. And a press device characterized in that they are concentrically opposed to each other.

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