JP2011016137A - Burr reduction press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burr reduction press device capable of suppressing increase of the number of processes by introduction and being easily introduced in, for example, a present mass-production process line, and also to provide a burr reduction press device capable of preventing occurrence of a peel-off part when using for a laminated plate such as a rubber/metal laminated plate.SOLUTION: The press device applies shearing work to a workpiece mounted on a die by shearing action between an cutting edge at a die side and an cutting edge for shear at a punch side based on relative movement of the die and a punch. The burr reduction press device includes a burr receiving recess at the side surface of the punch and allows an upper end side in the burr receiving recess to be a cutting edge for removing burr. The workpiece is preferably the rubber/metal laminated plate.

Description

  The present invention relates to a press apparatus used for shearing, and more particularly to a press apparatus that can reduce the occurrence of burrs.

  In a conventional press machine that shears a workpiece by placing the workpiece on the die and then shearing the die-side cutting blade and the punch-side cutting blade based on the relative movement between the die and the punch, There is a problem that burrs are generated on the cut surface caused by shearing.

  In the case where a laminated plate used as a molding material such as a gasket is used as the workpiece, the amount of burrs is particularly increased.

  A laminated board is a board obtained by adhering and laminating plate surfaces of a plurality of boards. For example, a synthetic rubber is coated on both surfaces of a steel sheet subjected to a special surface treatment via an adhesive layer. Examples thereof include a rubber metal laminate formed by coating a surface with a surface coating agent.

  The inventor conducted a shearing operation on the rubber metal laminated plate by the press device according to the above-described prior art, and investigated a mechanism for generating burrs.

  FIG. 8 is a schematic cross-sectional view for explaining shearing processing by a press device according to the prior art.

  First, after placing the rubber metal laminated plate 101 on the die 102, the punch 103 is lowered. The punch 103 comes into contact with the rubber metal laminate 101 and the rubber metal laminate 101 is deformed. In particular, the rubber layer 101G on the opposite side of the die is deformed so as to protrude to the side of the pressing surface by pressing of the punch and the die, and a distortion S is generated (FIG. 8A).

  If the punch 103 continues to descend further, the rubber metal laminate 101 is sheared by the shearing action of the die-side cutting blade 121 and the shearing cutting blade 131 on the punch 103 side, but is generated in the rubber layer 101G by the above deformation. The distortion S remains unresolved (FIG. 8 (b)).

  Then, when the rubber metal laminated plate 101 is released from the punch 103 after the shearing, the strain S generated in the rubber layer 101G is released and protrudes from the shearing portion as a burr B (FIG. 8C).

  Further, the present inventor performed microscopic observation on burrs generated in the rubber metal laminate by such a pressing method according to the prior art.

  FIG. 9 shows micrographs of burrs generated by the pressing method according to the prior art. 9A and 9B, 101G is a rubber layer on the opposite side of the die, 101M is a steel plate, and 101G 'is a rubber layer on the die side. The burr is shown surrounded by a broken line.

  Thus, when the press method according to the prior art is applied to the rubber metal laminate 101, it can be seen that significant burrs are generated in the rubber layer 101G opposite to the die.

  Furthermore, FIG. 10 shows a schematic cross-sectional view for explaining the generation of the peeled portion by the pressing method according to the prior art. As shown in the figure, in the process in which the punch 103 that has finished shearing is relatively moved in the direction opposite to that during shearing, the burrs B generated in the rubber layer 101G are rolled up by contact with the moving punch 103, and the rubber layer 101G May peel off, resulting in a peeled portion W.

  When a rubber metal laminate having such burrs or peeling parts is used, for example, in a gasket, if the burrs are broken, the broken burrs may become foreign matter and impair the gasket function. From this point, it is easy for further peeling to proceed, the sealing performance becomes unstable, and the service life is shortened.

  As a conventional example for preventing the generation of burrs, for example, in Patent Document 1, a V-shaped groove is formed in advance at a position corresponding to the outer peripheral edge of a press-molded product, so that burrs generated in the subsequent shearing process are generated. A method of preventing this is disclosed.

  However, this method reduces the occurrence of burrs, but increases the number of pressing processes, and is difficult to introduce into the current mass production process.

  On the other hand, Patent Document 2 discloses a method of performing shearing when the punch is lowered and deburring when the punch is raised.

  This mechanism will be described with reference to FIG.

  In FIG. 11, reference numeral 101 denotes a work, which is placed on the die 102. Reference numeral 121 denotes a die-side cutting blade included in the die 102. Reference numeral 103 denotes a punch, and the punch 103 includes a shearing cutting blade 131. The die 102 and the punch 103 are provided such that they can move relative to each other, and the workpiece 101 is sheared by the shearing action of the die side cutting edge 121 and the shearing cutting edge 131 on the punch 103 side based on the relative movement. Configured.

  Further, the side surface 132 of the punch 103 is provided with a burr receiving recess 133, and the lower end side of the burr receiving recess 133 is a deburring cutting blade 135.

  After the shearing process, the die 102 and the punch 103 continue to move relative to each other in the same direction as during the shearing process. Then, as shown in FIG. 11, the burr B generated in the punch cutting portion of the workpiece 101 due to shearing is housed in the burr receiving recess 133.

  Here, the moving direction of the punch 103 is changed from descending to rising, and the burr B generated in the punch cutting portion of the workpiece 101 due to the shearing action between the die side cutting edge 121 and the deburring cutting edge 135 on the punch 103 side. Is sheared.

  However, when deburring is performed in the process of relative movement in the opposite direction to that during shearing, the stripper 104 must be installed to prevent the workpiece 101 from floating from the die 102. The increase in power for increasing 103 must also be considered, which is difficult to introduce and expensive.

  Furthermore, as shown in FIG. 12, when the workpiece 101 is a laminated plate such as a rubber metal laminated plate, the stripper 104 is pressed when deburring in the process of relative movement in the opposite direction to that during shearing. Even so, the rubber layer 101G opposite to the die 102 in the workpiece 101 is pressed in the direction opposite to the joining surface with the steel plate 101M by the moving deburring cutting blade 135 and peeled off by being rolled up. The peeling part W might be produced.

  Thus, many problems remain in the conventional press technology for preventing the generation of burrs. In addition, in the case of using a laminated plate such as a rubber metal laminated plate, it is very difficult to satisfy the condition that no peeling portion is generated.

  As measures to prevent the occurrence of burrs and peeling parts, it is conceivable to change the hardness of the workpiece, etc., but this is limited and does not lead to a drastic solution.

JP-A-11-333529 Japanese Utility Model Publication No. 61-138423

  An object of the present invention is to provide a burr reduction press apparatus that can suppress an increase in the number of processes due to introduction, and can be easily introduced into, for example, an existing mass production process.

  Moreover, the further subject of this invention is providing the burr | flash reduction press apparatus which does not generate | occur | produce a peeling part, when a laminated board like a rubber metal laminated board is used.

  Other problems of the present invention will become apparent from the following description.

  The above problems are solved by the following inventions.

(Claim 1)
In the press device that shears the workpiece placed on the die by the shearing action of the cutting blade on the die side and the cutting blade for shearing on the punch side based on the relative movement of the die and the punch,
A burr reducing press device comprising a burr receiving recess on a side surface of the punch, wherein the upper end side of the burr receiving recess is a cutting blade for deburring.

(Claim 2)
2. The burr reducing press apparatus according to claim 1, wherein the burr receiving recess has a quadrangular cross section.

(Claim 3)
2. The burr reducing press apparatus according to claim 1, wherein the burr receiving recess has a triangular cross section.

(Claim 4)
The angle formed by the ridge line portion between the side wall of the burr receiving recess opposite to the shearing cutting blade and the side wall of the punch in the burr receiving recess is an acute angle or a right angle. The burr reduction press apparatus according to any one of the above.

(Claim 5)
In the burr receiving recess, the side wall on the shearing cutting blade side of the burr receiving recess has an inclination so as to approach the shearing cutting blade side from the groove bottom side to the opening side of the burr receiving recess. The burr reduction press apparatus according to any one of claims 1 to 4.

(Claim 6)
3. The burr reducing press device according to claim 1, wherein the burr receiving recess has a square cross section.

(Claim 7)
7. The burr reducing press device according to claim 1, wherein a plurality of the burr receiving recesses are provided on a side surface of the punch.

(Claim 8)
The said burr receiving recessed part has a 2nd cutting edge for deburring in the back part of the side wall on the opposite side to the cutting blade for shear in this burr receiving recessed part. Burr reduction press machine.

(Claim 9)
The burr reduction press apparatus according to claim 1, wherein the workpiece is a laminated plate.

  According to the present invention, an increase in the number of processes due to introduction can be suppressed, and for example, it is possible to provide a burr reduction press apparatus that can be easily introduced into the current mass production process.

  Furthermore, according to the present invention, it is possible to provide a burr reduction press device that does not generate a peeling portion when a laminated plate such as a rubber metal laminated plate is used.

Schematic cross-sectional view of burr reduction press machine Schematic cross-sectional view explaining dimensions of burr reduction press Schematic sectional view explaining the burr reduction press method Schematic sectional view showing an example in which a burr receiving recess is formed in a quadrangular cross section Schematic sectional view showing an example in which a burr receiving recess is provided in a triangular cross section Schematic sectional view showing an example in which a plurality of burr receiving recesses are provided on the side surface of the punch. Schematic sectional view showing an example in which the burr receiving recess is provided with a second deburring cutting blade at the back of the side wall opposite to the shearing cutting blade in the burr receiving recess. Schematic cross-sectional view explaining the pressing method according to the prior art Micrograph of burr produced by the pressing method according to the prior art Schematic cross-sectional view for explaining generation of a peeling portion by a pressing method according to the prior art Schematic sectional view of a burr reduction press device according to the prior art Schematic sectional view for explaining deburring by a deburring press device according to the prior art

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view of a burr reduction press apparatus according to the present invention.

  In FIG. 1, reference numeral 1 denotes a work, which is placed on a die 2. Reference numeral 21 denotes a die side cutting edge provided in the die 2. Reference numeral 3 denotes a punch, and the punch 3 includes a cutting edge 31 for shearing. The die 2 and the punch 3 are provided so as to be movable relative to each other, and the workpiece 1 is sheared by the shearing action of the die side cutting edge 21 and the shearing cutting edge 31 on the punch 3 side based on the relative movement. Configured.

  The work 1 to which the present invention is applied may be any, and examples thereof include a rubber plate and a metal plate, but a laminated plate obtained by bonding and laminating plate surfaces of a plurality of plates is preferable.

  As the laminated plate, a rubber metal laminated plate or the like formed by coating a synthetic rubber on both surfaces of a steel sheet subjected to a special surface treatment, and further coating a surface coating agent on the surface of the synthetic rubber. Preferred examples can be given.

  The burr reducing press apparatus according to the present invention includes a burr receiving recess 33 on the side surface 32 of the punch 3, and a burr removing cut for cutting off the burr generated by the shearing process on the upper end side of the burr receiving recess 33. The blade 35 is a feature. That is, the deburring process is performed by the shearing action between the die side cutting edge 21 and the burr receiving recess 33 on the punch 3 side based on the relative movement.

  FIG. 2 is a schematic cross-sectional view for explaining the dimensions of the burr reduction press apparatus.

  In FIG. 2, the recess 33 is formed by notching the side surface 32 of the punch 3 so as to have a square cross section, and includes a side wall 34, a side wall 34 ′ opposite to the side wall 34, and a bottom wall 34 ″.

  In the present specification, the upper end side corresponds to a ridge line portion between the side wall 34 formed on the side opposite to the shearing cutting blade 31 and the side surface 32 of the punch among the side walls 34 and 34 ′ of the recess 33.

  D is the groove depth of the burr receiving recess, E is the groove width of the burr receiving recess, F is the distance from the shearing blade to the side surface of the burr receiving recess on the cutting blade side, and L is the workpiece thickness. .

  In the burr receiving recess formed in a square cross section, the above dimensions are appropriately set according to the thickness L of the workpiece. For example, when the thickness L of the workpiece is 0.15 to 0.63 mm, the groove depth D is preferably 0.2 to 2 mm, more preferably 0.5 to 1 mm, and the groove width E is Preferably, it is 1 to 5 mm, more preferably 1 to 2 mm. The distance F from the cutting edge for shearing to the side surface on the cutting edge side in the burr receiving recess is preferably 1 to 10 mm, more preferably 2 to 5 mm.

  In FIG. 2, G indicates the clearance between the die 2 and the punch 3. The dimension of the clearance G is appropriately set according to the thickness L of the workpiece, the hardness of the workpiece, and the like. If the workpiece is a rubber metal laminate, the thickness can be set according to the thickness L of the rubber metal laminate and the steel type of the steel plate in the rubber metal laminate. In the case where the workpiece is a rubber metal laminate, the preferable clearance G is, for example, about 5 μm when the thickness L of the rubber metal laminate is 0.1 to 0.4 mm if the steel type of the steel plate is mild steel, rubber metal When the thickness L of the laminate is 0.4 to 1.2 mm, about 5% of the thickness L of the rubber metal laminate, and when the thickness L of the rubber metal laminate is 1.2 to 2.0 mm, the rubber It is about 6% of the thickness L of the metal laminate. For example, if the steel type of the steel plate is hard steel, the rubber metal is about 5 μm when the thickness L of the rubber metal laminate is 0.1 to 0.2 mm. When the thickness L of the laminate is 0.2 to 0.4 mm, about 25 μm, and when the thickness L of the rubber metal laminate is 0.4 to 0.8 mm, 7% of the thickness L of the rubber metal laminate When the thickness L of the rubber metal laminate is 0.8 to 1.2 mm, about 9% of the thickness L of the rubber metal laminate, rubber gold When the thickness L of the laminate is 1.2 to 1.6 mm, about 10% of the thickness L of the rubber metal laminate, and when the thickness L of the rubber metal laminate is 1.6 to 2.0 mm, the rubber It is about 12% of the thickness L of the metal laminate.

  The burr reduction press method using the burr reduction press apparatus according to the present invention includes the steps of subjecting the workpiece 1 placed on the die 2 to the shearing process and the deburring process.

  Hereinafter, an embodiment of the burr reduction press method will be described with reference to FIG. In the drawing, the arrow indicates the moving direction of the punch 3. In addition, a rubber metal laminate is used here as a work.

  First, after placing the rubber metal laminated plate 1 on the die 2, the punch 3 is lowered. The punch 3 comes into contact with the rubber metal laminate 1 and the rubber metal laminate 1 is deformed. In particular, the rubber layer 1G on the opposite side of the die 2 is deformed so as to protrude from the side of the pressing surface by the punch and die pressing, and a distortion S is generated (FIG. 3A).

  When the punch continues to descend further, the rubber metal laminate 1 is sheared by the shearing action of the die-side cutting edge 21 and the shearing cutting edge 31 on the punch 3 side, and the shearing process is completed. At this time, the strain S generated in the rubber layer 1G remains unresolved (FIG. 3B).

  After the shearing process, the die 2 and the punch 3 continue to move relative to each other in the same direction as during the shearing process. Then, the rubber layer 1G protrudes inside the burr receiving recess 33 so as to eliminate the strain S, and a burr B is formed. The burr B is accommodated in the burr receiving recess 33 (FIG. 3C).

  When the die 2 and the punch 3 continue to move relative to each other in the same direction as in the shearing process, the die side cutting blade 21 and the punch 3 side deburring cutting blade 35 based on the relative movement cause a rubber action. The burrs B generated at the punch cut portions of the metal laminate 1 are sheared, and the deburring process is completed (FIG. 3D).

  After that, the punch 3 that has finished the process moves up to a predetermined position for the next cycle (FIG. 3E).

  In this way, shearing and deburring can be performed using the deburring press apparatus according to the present invention.

  As described above, the burr reduction press apparatus according to the present invention performs both the shearing and the deburring process when the punch is lowered (FIGS. 3A to 3D), and therefore the time when the punch is raised (FIG. 3). In 3 (e)), deburring has already been completed.

  Therefore, as described in the description of the prior art shown in FIG. 10, the burr B generated in the shearing of the rubber metal laminate 101 is rolled up by the contact with the rising punch 103 and the rubber layer 101G is peeled off. There is no waking.

  Further, at the time of deburring, conventionally, as shown in FIG. 12, the direction in which the cutting blade 135 for deburring presses the rubber layer 101G is the opposite direction to the adhesive layer 101A, and thus the peeling portion W is generated. On the other hand, in the present invention, the direction in which the deburring cutting blade 35 presses the rubber layer 1G is the downward direction, that is, the direction of the joint surface with the steel plate, and therefore the peeling portion W does not occur.

  Such a rubber metal laminated plate is suitable as a gasket material, and it is also preferable to use the burr reduction press device according to the present invention in a shearing process for forming a gasket made of a laminated plate.

  In the gasket made of the rubber metal laminate manufactured by the burr reduction press device according to the present invention, since the burr is removed, the broken burr becomes a foreign substance and does not impair the gasket function, and the peeling portion is removed. Since it does not have, it will also prevent further peeling. That is, a stable and long-life gasket is provided.

  In the present invention, the above-described peeling prevention effect can be obtained even in a laminate other than the rubber metal laminate.

  Since the burr reduction press apparatus according to the present invention performs both the shearing and the deburring process when the punch is lowered once, the increase in the number of processes due to the introduction can be suppressed. Therefore, for example, it can be easily introduced into the current mass production process.

  Further, for example, in a device that performs deburring when raising as shown in Patent Document 2, in addition to power for raising the punch, power increase for deburring when raising the punch and reinforcement of the device are studied. However, such a problem does not occur in the burr reduction press apparatus according to the present invention.

  Furthermore, in the apparatus that performs deburring at the time of ascent, as shown in FIG. 11, if the work 101 is not supported by pressing the stripper 104, the work 101 is removed from the die 102 when deburring by the deburring cutting blade 135. The phenomenon of rising and rising. Further, if the stripper side cutting blade 136 is not provided at the edge of the stripper, the shearing action between the stripper side cutting blade 141 and the deburring cutting blade 135 on the punch 103 side is impaired.

  On the other hand, in the burr reduction press apparatus according to the present invention, a stripper may or may not be used.

  That is, unlike the deburring when the punch is raised as disclosed in Patent Document 2, the deburring according to the present invention is a cutting when the punch is lowered. Therefore, when deburring, the workpiece floats off the die 2 and does not roll up, and the burrs are removed by the shearing action based on the relative movement between the die side cutting edge 21 and the deburring cutting edge 35 on the punch 3 side. Therefore, the deburring effect can be sufficiently obtained without using a stripper.

  In addition, when a stripper is used in the burr reduction press apparatus according to the present invention, the effect of further reducing the generation of burr during shearing and improving the punching accuracy can be obtained.

  The shape of the burr receiving recess 33 is such that when the die 2 and the punch 3 continue to move in the same direction as during shearing, the die side cutting edge 21 and the punch 3 side deburring cutting edge based on the relative movement. As long as it is formed so as to deburr the burr generated in the punch cutting part of the workpiece by the shearing action with 35, it is not limited to a square cross section.

  FIG. 4 is a schematic cross-sectional view showing an example in which the burr receiving recess is formed in a square cross section.

  In FIG. 4, the burr receiving recess is formed in a quadrangular cross section, and the angle formed by the ridge line portion between the side wall opposite to the shearing cutting edge in the burr receiving recess and the side wall of the punch is , Provided to have an acute angle.

  In the present invention, the angle formed by the ridge line portion between the side wall opposite to the shearing cutting edge in the burr receiving recess and the side wall of the punch is preferably an acute angle or a right angle.

  By using the cutting blade 35 for deburring formed in this way, the cut surface can be finished more flat.

  FIG. 5 is a schematic cross-sectional view showing an example in which the burr receiving recess 33 is provided in a triangular cross section.

  In the burr receiving recess 33 shown in FIG. 5, the side wall 34 ′ on the shear cutting edge 31 side of the burr receiving recess 33 moves toward the shearing cutting edge 31 from the groove bottom side to the opening side of the burr receiving recess 33. It is provided to have an inclination so as to approach.

  In the present invention, the side wall on the shearing cutting blade side in the burr receiving recess is provided so as to be inclined so as to approach the shearing cutting blade side from the groove bottom side of the burr receiving recess 33 toward the opening side. It is preferable.

  In the burr receiving recess having such a shape, the cut burr has an effect of being easily discharged out of the burr receiving recess due to the inclination.

  FIG. 6 is a schematic cross-sectional view showing an example in which a plurality of burr receiving recesses 33 are provided on the side surface 32 of the punch 3.

  In this way, by providing a plurality of burr receiving recesses 33, that is, a plurality of deburring cutting edges 35, it is possible to more reliably remove burrs.

  Similarly to the example shown in FIG. 4, the angle formed by the ridge line portion between the side wall 34 opposite to the shearing cutting blade in each burr receiving recess and the side wall 32 of the punch 3 is provided to be an acute angle. Further, as in the example shown in FIG. 5, the side wall 34 ′ on the shearing cutting edge 31 side of each burr receiving recess 33 has a shearing cutting edge as it goes from the groove bottom side to the opening side of each burr receiving recess 33. It has an inclination to approach the 31 side.

  FIG. 7 is a schematic cross-sectional view showing an example in which the burr receiving recess 33 has a second deburring cutting edge 36 at the back of the side wall 34 opposite to the shearing cutting edge 31 in the burr receiving recess 33. .

  In this specification, the expression of rising / lowering is used for convenience as the direction of movement of the punch, but these expressions indicate the direction of relative movement of the punch with respect to the die placed on the lower side, As long as the directions of the relative movements are the same, it is not always necessary that the upward movement is the upward movement / lowering is the downward movement.

  Further, in this specification, as the position where the cutting edge for deburring is provided, the expression of the upper end side / lower end side of the burr receiving recess is used for convenience. However, these expressions indicate that the punch cutting shear blade faces downward. If the positional relationship is the same, the upper end side does not necessarily have to be one end side in the upward direction / the lower end side has to be one end side in the downward direction.

1: Workpiece 2: Die 21: Die-side cutting blade 3: Punch 31: Shearing blade 32: Side surface 33: Burr receiving recess 34: Side wall 35: Deburring cutting blade

Claims (9)

In the press device that shears the workpiece placed on the die by the shearing action of the cutting blade on the die side and the cutting blade for shearing on the punch side based on the relative movement of the die and the punch,
A burr reducing press device comprising a burr receiving recess on a side surface of the punch, wherein the upper end side of the burr receiving recess is a cutting blade for deburring.   2. The burr reducing press apparatus according to claim 1, wherein the burr receiving recess has a quadrangular cross section.   2. The burr reducing press apparatus according to claim 1, wherein the burr receiving recess has a triangular cross section.   The angle formed by the ridge line portion between the side wall of the burr receiving recess opposite to the shearing cutting blade and the side wall of the punch in the burr receiving recess is an acute angle or a right angle. The burr reduction press apparatus according to any one of the above.   In the burr receiving recess, the side wall on the shearing cutting blade side of the burr receiving recess has an inclination so as to approach the shearing cutting blade side from the groove bottom side to the opening side of the burr receiving recess. The burr reduction press apparatus according to any one of claims 1 to 4.   3. The burr reducing press device according to claim 1, wherein the burr receiving recess has a square cross section.   7. The burr reducing press device according to claim 1, wherein a plurality of the burr receiving recesses are provided on a side surface of the punch.   The said burr receiving recessed part has a 2nd cutting edge for deburring in the back part of the side wall on the opposite side to the cutting blade for shear in this burr receiving recessed part. Burr reduction press machine.   The burr reduction press apparatus according to claim 1, wherein the workpiece is a rubber metal laminate.