JP4775782B2 - Drilling device - Google Patents

Description

  The present invention relates to a punching device that moves a cam slide with respect to a cam driver by a cam driver, and punches a punched material made of a thin metal plate or the like by a punch punch mounted on the cam slide.

JP 2002-126833 A

  For example, Patent Document 1 discloses a cam driver, a cam slide that is movably in contact with the cam driver, and a hole in a perforated material that is attached to the cam slide and is made of a thin metal plate or the like at one flat circular end surface. There has been proposed a drilling device provided with a substantially cylindrical drilling punch for drilling (through hole).

  By the way, in such a perforating device, in order to make a hole in the perforated material with a flat circular end face of the perforated punch, a hole of the perforated punch and the die is formed so as not to cause burrs or the like in the perforated material. Therefore, it is necessary to accurately perform positioning, so-called blade alignment, and preparation work for drilling is extremely troublesome and it is difficult to perform drilling easily and quickly.

  The present invention has been made in view of the above-mentioned points, and an object of the present invention is to make it possible to easily and quickly punch holes and to obtain a processed product free from burrs. It is to provide a dawn device.

  A drilling device according to a first aspect of the present invention includes a cam slide, a cam driver for moving the cam slide, a support means for movably supporting the cam slide, and a return mechanism for returning the cam slide to the initial position. Comprising a device, a punch punch attached to the cam slide, and a die having a hole into which the punch punch is inserted, wherein the punch punch is a punch body attached to the cam slide And a conical protrusion integrally provided on the end face of the punch body.

  According to the punching device of the first aspect, since the punching punch having the conical protrusion integrally provided on the end surface of the punch body is attached to the cam slide, the punching protrusion First, a pierced hole is formed in a perforated material made of sheet metal, etc., and the movement of the perforated material is restricted by a protrusion inserted into the pierced hole, and then the perforated material around the circular end surface of the punch body. As a result, it is possible to form a through hole in the perforated material by breaking the hole, so that even if the difference between the perforated punch and the hole of the die is set slightly larger, no burr or the like is generated in the perforated material. Through-holes can be formed accurately, and thus drilling can be performed easily and quickly, and a processed product free from burrs can be obtained.

  In the drilling device of the second aspect of the present invention, in the drilling device of the first aspect, the end surface of the punch body is a circular end surface, and the protrusion is conical, and has a diameter smaller than the diameter of the circular end surface. The circular bottom surface is provided integrally with the circular end surface.

  In the punching device of the third aspect of the present invention, in the drilling device of the second aspect, a tangent line and a circular end surface that intersects the axial center of the punch body and is in contact with the annular outer edge of the circular end surface and the tip end surface of the protrusion Is between 25 ° and 60 °, the difference e between the radius D1 / 2 of the circular end face and the radius d1 / 2 of the circular bottom face and the length L of the annular outer edge of the circular end face. The ratio e / L is 0.05 or more and 0.14 or less.

  In the punching device of the third aspect, if the protrusion of the punch is too low, the protrusion is pulled out of the hole and cannot control the movement of the punched material made of sheet metal, etc. If the diameter is too high, the protrusion will bend and break, causing frequent replacement, and if the diameter of the circular bottom surface of the punch of the drilling punch approaches the diameter of the circular end face, The perforated material cannot be broken well, and if the diameter of the circular bottom surface of the perforation punch protrusion is sufficiently smaller than the diameter of the circular end face, the protrusion will bend and break, causing frequent replacement. It was made based on the knowledge that As a result of earnest research based on such knowledge, even if the thickness of the perforated material to be formed through holes is different, the diameter of the through hole to be formed in the perforated material is also different. However, if the angle θ is 25 ° or more, it is possible to effectively prevent the protrusions from coming out of the piercing hole, and if the ratio e / L is 0.05 or more, the influence of the piercing hole can be eliminated to obtain a hole. It has been found that the shining material can be favorably broken, and that when the angle θ is 60 ° or less and the ratio e / L is 0.05 or less, bending of the protrusion, breakage, etc. can be avoided well. Therefore, according to the drilling device of the third aspect of the present invention, since the above-described configuration is provided, the hole is optimally formed for the drilling material having different thicknesses and the through holes having different diameters. So that the through hole is placed in the correct position without burr. It can be formed.

  In the drilling device of the fourth aspect of the present invention, in the drilling device of the third aspect, the angle θ is 30 ° or more and 55 ° or less, and the ratio e / L is 0.09 or more. 0.12 or less.

  In the drilling device of the fifth aspect of the present invention, in the drilling device of any one of the second to fourth aspects, the annular outer edge of the circular end surface of the punch is not less than 0.3 mm and not more than 3 mm. It is chamfered with a radius of curvature R.

  According to the punching device of the fifth aspect, since it has the above-described configuration, the punching material made of sheet metal or the like is more preferably pulled and broken by reducing the effect of shear that causes burrs. obtain.

  In the drilling device according to the sixth aspect of the present invention, in the drilling device according to any one of the second to fifth aspects, the diameter D1 of the circular end face of the punch is 100 mm or less.

  In the drilling device according to the seventh aspect of the present invention, in the drilling device according to any one of the second to sixth aspects, the diameter D1 of the circular end surface of the punch is 30 mm or less.

  In the punching device according to the eighth aspect of the present invention, in the drilling device according to any one of the second to seventh aspects, the hole of the die is circular, and the hole of the die corresponds to the diameter D1 of the circular end surface of the punch. The ratio D1 / D2 of the diameter D2 is 0.80 or more, and when the thickness of the perforated material to be drilled is t, the radius D1 / 2 of the circular end face and the radius D2 / 2 of the circular hole of the die The difference f is 0.15 t or more.

  According to the punching device of the eighth aspect, since the ratio D1 / D2 is 0.80 or more and the difference f is 0.15 t or more, mainly tensile fracture occurs in addition to some shearing. Thus, the through hole can be effectively formed in the perforated material made of a thin metal plate or the like.

  In the punching device of the ninth aspect of the present invention, in the punching device of the eighth aspect, the ratio D1 / D2 is 0.85 or more.

  According to the punching device of the ninth aspect, since the ratio D1 / D2 is 0.85 or more, it is possible to more effectively form the through hole in the perforated material made of a thin plate metal or the like.

  In the punching device of the tenth aspect of the present invention, the difference f is 2 mm or less in the punching device of the eighth or ninth aspect.

  In the drilling device according to the eleventh aspect of the present invention, in the drilling device according to any one of the second to tenth aspects, the die is connected to the hole and smaller than the diameter D2 of the hole. And a small circular hole having a diameter D3 larger than the diameter D1 of the circular end surface.

According to the punch apparatus of the eleventh aspect, because they comprise the above-described configuration, the punch waste (scraps) generated after the formation of the through hole Ru can be held in the small circular holes.

  In the drilling device according to the twelfth aspect of the present invention, in the drilling device according to any one of the first to eleventh aspects, the cam driver and the cam slide have sliding surfaces that are in sliding contact with each other. The punch is used to break the perforated material around the end surface of the punch body with the protrusions breaking through the perforated material and restricting the movement of the perforated material with the protrusion inserted into the perforated hole. Through holes are formed in the perforated material.

  When the perforated material to be perforated by the perforating apparatus of the present invention is made of a thin plate metal, such a thin plate metal has a thickness of about 0.4 mm to 2.0 mm in order to obtain good results. However, in order to obtain better results, it is preferable that the plate thickness is about 0.6 mm to 1.6 mm.

  According to the present invention, it is possible to provide a drilling device that can easily and quickly drill holes and that can obtain a processed product without burrs or the like.

  Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

  1 to 10, the hanging cam type drilling device 1 of this example is fixed to a cam slide 4 and a lower die 2 and fixed to a cam driver 3 and an upper die 7 that move the cam slide 4 in the X direction. And supporting means 8 for supporting the cam slide 4 so as to be movable in the X direction so that the cam slide 4 can be guided by the cam driver 3 and moved in the X direction by contacting the cam driver 3. A cam device 60 provided with a return mechanism 6 for returning the cam slide 4 to an initial position (position shown in FIG. 7), a punch punch 5 attached to the cam slide 4, and a lower mold 2 on the front side of the cam slide 4 And a die 10 having a circular hole (circular hole) 9 into which the punching punch 5 is inserted.

  The upper mold 7 is connected to a hydraulic ram, and is moved up and down with respect to the lower mold 2 by the operation of the hydraulic ram.

  The cam driver 3 includes a base body 13 fixed to the lower mold 2 via bolts 11, knock pins 12, and the like, and a protrusion 14 integrally formed on the upper surface of the base body 13. In this example, the protruding portion 14 is provided with an inverted V-shaped sliding surface 15.

  The cam slide 4 includes a cam slide main body 17 having a through-hole 16, sliding plates 20 and 21 attached to respective side surfaces 18 and 19 of the cam slide main body 17 by embedded bolts, and an upper surface of the cam slide main body 17. 22 is provided with a sliding plate 23 attached to the lower surface of the cam slide main body 17 and a bifurcated projection 25 formed integrally with the cam slide main body 17. A punch punch 5 is attached to a tool attachment surface 27 formed of a flat front surface of the cam slide body 17 via a positioning block 24, a bolt 11, a knock pin 12, and the like.

  The protrusion 25 is provided with a sliding surface 26 having a shape complementary to the sliding surface 15, in this example, an inverted V-shape. The sliding surface 26 is in sliding contact with the sliding surface 15 so as to be movable in the X direction.

  The support means 8 includes a support body 28 fixed to the upper die 7 with bolts 11, knock pins 12, etc., and a lateral direction attached to the lower surface of the support body 28 and perpendicular to the X direction of the cam slide 4, In this example, a support member 29 that supports both end portions in the Y direction so as to be movable in the X direction is provided.

  The support body 28 has a recess 30 on the lower surface side, and the upper portion of the cam slide body 17 is arranged in the recess 30. In the recess 30, the support body 28 includes a sliding contact surface 31 and 32 in which the respective side surfaces of the sliding plates 20 and 21 are slidably contacted, a sliding bottom surface 33 in which the upper surface of the sliding plate 23 is slidably contacted, and a cam slide. A front surface 34 facing the upper front surface of the main body 17 and a rear surface 35 facing the upper rear surface of the cam slide main body 17 are provided.

  As shown in FIG. 4, each support member 29 is detachably attached to the lower surface of the support main body 28 with bolts 11, and the lower surface 36 of both end protrusions in the Y direction of the cam slide main body 17 is slidable on the upper surface. Thus, the cam slide 4 is suspended from the support body 28 via the support members 29.

  The return mechanism 6 includes a rod 38 that passes between a front surface 34 and a rear surface 35 through a bush 37 that is juxtaposed to the cam slide body 17 in the through hole 16, and a coil spring 39 that serves as an elastic means. The rod 38 includes a columnar rod body 40, a rod member 41 fixed to one end of the rod body 40 with the bolt 11, and a rod formed integrally with the other end of the rod body 40. The coil spring 39 is disposed in contact with the cam slide main body 17 at the recess 43 of the cam slide main body 17 at the other end.

  In the return mechanism 6, the cam body 4 is moved in the X direction by the cam driver 3 as shown in FIGS. 1 and 2 when the support body 28 is lowered together with the upper die 7 lowered by the operation of the hydraulic ram. Later, when the support body 28 is raised together with the upper die 7 raised by the reverse operation of the hydraulic ram, the cam slide 4 is moved in the X direction toward the front surface 34 by the elastic force of the coil spring 39, and FIG. The cam slide 4 is returned to the initial position shown in FIG.

  The punch 5 has a cylindrical punch body 44 attached to the cam slide 4, and one circular end face 45 of the punch body 44 is concentric with the circular end face 45 and smaller than the diameter D 1 of the circular end face 45. A conical protrusion 47 in this example, which is provided integrally with a circular bottom surface 46 having a diameter d1, is provided. The punch main body 44 is attached to the tool attachment surface 27 of the cam slide 4 on the other circular end surface side via the positioning block 24, the bolt 11, the knock pin 12, and the like.

  In the punch 5, the angle θ formed between the circular end surface 45 and the tangent line 51 that intersects the axis O of the punch body 44 and contacts the annular outer edge 49 of the circular end surface 45 and the tip surface 50 of the protrusion 47 is 25 ° or more. The angle e is 60 ° or less, and the ratio of the difference e between the radius D1 / 2 of the circular end face 45 and the radius d1 / 2 of the circular bottom face 46 to the length L (= πD1) of the annular outer edge 49 of the circular end face 45 e / L is 0.05 or more and 0.14 or less, and the annular outer edge 49 of the circular end face 45 is chamfered with a curvature radius R of 0.3 mm or more and 3 mm or less.

  The angle θ may be 30 ° or more and 55 ° or less, and the ratio e / L may be 0.09 or more and 0.12 or less.

  In addition to the circular hole 9, the die 10 has a circular hole 53 that is continuous with the circular hole 9 and has a larger diameter than the circular hole 9 and discharges punch scraps (scrap) 52. The ratio D1 / D2 of the diameter D2 of the circular hole 9 with respect to the diameter D1 of the end face 45 is 0.80 or more, and the radius of the circular end face 45 is t, where t is the thickness of the thin metal 54 as the material to be perforated. The difference (clearance) f between D1 / 2 and the radius D2 / 2 of the circular hole 9 of the die 10 is 0.15 t or more and 2 mm or less.

  In the drilling device 1 of this example, when the hydraulic ram is actuated and the support body 28 is lowered with the cam slide 4 returned to the initial position shown in FIG. The sliding surface 26 slides into contact with the sliding surface 15 and is moved in the X direction while being guided by the sliding surface 15, thereby moving toward the thin metal plate 54. As shown in the drawing, a piercing hole 55 is formed in the thin metal plate 54 by the projection 47, and the punching punch 5 is further moved in a state in which the movement of the thin metal plate 54 is restricted by the projection 47 inserted into the piercing hole 55. When the punch body 44 of the punch 5 is inserted into the hole 9, the thin metal plate 54 is broken around the circular end surface 45 of the punch main body 44 as shown in FIG. Formed . After punching the thin metal plate 54 by the punching punch 5, when the hydraulic ram is reversely operated and the support body 28 is raised, the punching punch 5 is returned to the initial position by the return mechanism 6. By being lifted while being moved in the X direction, the circular hole 9 is extracted.

  According to the drilling device 1 described above, the cam slide 4, the cam driver 3 that moves the cam slide 4, the support means 8 that supports the cam slide 4 so as to be movable in the X direction, and the return that returns the cam slide 4 to the initial position. A cam device 60 having a mechanism 6, a punching punch 5 attached to the cam slide 4, and a die 10 having a circular hole 9 into which the punching punch 5 is inserted are provided. Is provided with a punch main body 44 attached to the cam slide 4 and a conical protrusion 47 integrally provided on the circular end surface 45 of the punch main body 44. And the movement of the thin metal plate 54 is restricted by the protrusion 47 inserted in the through hole 55, and then the thin metal plate 54 is broken around the circular end surface 45 of the punch body 44. As a result, the through hole 56 can be formed in the thin metal plate 54. As a result, the difference between the hole punch 5 and the hole of the die 10 is set to be slightly larger, for example, the radius D1 / 2 of the hole punch 5 and the die 10 Even if the difference f from the radius D2 / 2 of the circular hole 9 is set to be 0.4 mm to 2.0 mm, the through hole 56 can be accurately formed without causing burrs or the like in the thin metal plate 54, Thus, drilling can be carried out easily and quickly, and a processed product free from burrs can be obtained.

  According to the punching device 1, the angle θ formed between the tangent line 51 that intersects with the annular outer edge 49 of the circular end surface 45 and the tip surface 50 of the protrusion 47 and the circular end surface 45 intersects with the axis O of the punch body 44. The ratio e / of the difference e between the radius D1 / 2 of the circular end face 45 and the radius d1 / 2 of the circular bottom face 46 and the length L of the annular outer edge 49 of the circular end face 45 is not less than 60 ° and not more than 60 °. Since L is a value of 0.05 or more and 0.14 or less, it is possible to optimally perforate the thin metal plate 54 having a different thickness t and the through hole 56 having a different diameter. Thus, the through hole 56 can be formed at an accurate position without burrs.

  According to the punching device 1, since the annular outer edge 49 of the circular end face 45 of the punching punch 5 is chamfered with a radius of curvature R of 0.3 mm or more and 3 mm or less, shearing that causes burrs is caused. The sheet metal 54 can be pulled and broken better by reducing the effect.

  According to the punching device 1, the ratio D1 / D2 of the diameter D2 of the circular hole 9 of the die 10 to the diameter D1 of the circular end face 45 is 0.80 or more, and the thickness of the thin metal 54 to be punched is t. Since the difference f between the radius D1 / 2 of the circular end face 45 and the radius D2 / 2 of the circular hole 9 of the die 10 is 0.15 t or more, in addition to some shearing, the effect is mainly caused by tensile fracture. Thus, the through hole 56 can be formed in the thin metal plate 54, and when the ratio D1 / D2 is 0.85 or more, the through hole 56 can be formed more effectively in the thin metal plate 54. .

In the punching device 1 of the present example, the die 10 is configured to include the circular hole 9 into which the punching punch 5 is inserted and the circular hole 53 through which the punch scraps 52 are discharged. As shown in FIG. 11, in addition to the circular hole 9 and the circular hole 53, the diameter D3 is connected to the circular hole 9 and smaller than the diameter D2 of the circular hole 9 but larger than the diameter D1 of the circular end surface 45. The die 10 may be configured to further include a small circular hole 57, and the drilling punch 5 is inserted into the small circular hole 57 disposed between the circular hole 9 and the circular hole 53. When to discharge the punch waste 52 through the punch waste 52 which occurs after the formation of the through hole 56 Ru can be held in the small circular hole 57.

  Moreover, although the drilling apparatus 1 of this example has the drilling punch 5 by which chamfering is given to the annular | circular outer edge 49 of the circular end surface 45, it replaces with this and such chamfering is not given. A perforated punch may be provided.

  Further, the punching device 1 of this example is integrated with a punch body having a triangular, square or polygonal end surface as viewed from the X direction, for example, instead of the punching punch 5 and the end surface of the punch main body. A perforated punch provided with a conical projection provided on the metal plate, and the perforated punch can pierce the thin metal plate 54 by the projection and then open a hole 55, and then around the end face. The thin metal plate 54 can be broken to form triangular, quadrangular or polygonal through holes in the thin metal plate 54.

It is sectional explanatory drawing of the example of embodiment of this invention. It is a partially expanded explanatory view of the example shown in FIG. It is III-III arrow explanatory drawing of the example shown in FIG. It is IV-IV sectional view explanatory drawing of the example shown in FIG. It is a partially expanded explanatory view mainly of the punch punch of the example shown in FIG. It is VI-VI arrow explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is explanatory drawing of the punch and die | dye used for the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is a part explanatory view of other examples of an embodiment of the invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drilling device 3 Cam driver 4 Cam slide 5 Drill punch 6 Return mechanism 8 Support means 9, 53 Circular hole 10 Die 44 Punch main body 45 Circular end surface 46 Circular bottom surface 47 Protrusion

Claims (7)

  A cam device having a cam slide, a cam driver for moving the cam slide, a supporting means for movably supporting the cam slide, and a return mechanism for returning the cam slide to an initial position; and a punch punch attached to the cam slide; , A die having a hole into which a punch is inserted, and the punch has a conical shape integrally provided on an end surface of the punch body attached to the cam slide. The end face of the punch body is a circular end face, and the protrusion is conical and is provided integrally with the circular end face with a circular bottom surface having a diameter smaller than the diameter of the circular end face. The angle θ between the tangent line that intersects the axial center of the punch body and is in contact with the annular outer edge of the circular end surface and the tip end surface of the protrusion and the circular end surface is 25 ° or more. The ratio e / L between the difference e between the radius D1 / 2 of the circular end face and the radius d1 / 2 of the circular bottom face and the length L of the annular outer edge of the circular end face is 0.05 or more. The annular outer edge of the circular end face of the punching punch is chamfered with a radius of curvature R of 0.3 mm or more and 3 mm or less, and the hole of the die is circular. The ratio D1 / D2 of the diameter D2 of the die hole to the diameter D1 of the circular end face of the punch is 0.80 or more, and when the thickness of the drilled material to be drilled is t, the radius D1 / 2 of the circular end face Is a drilling device in which the difference f between the radius D2 / 2 of the die and the die hole is 0.15 t or more.   The drilling device according to claim 1, wherein the angle θ is 30 ° or more and 55 ° or less, and the ratio e / L is 0.09 or more and 0.12 or less.   The diameter D1 of the circular end surface of a punch punch is 100 mm or less, The punch apparatus of Claim 1 or 2.   The diameter D1 of the circular end surface of a punch punch is 30 mm or less, The punch apparatus as described in any one of Claim 1 to 3.   The drilling device according to any one of claims 1 to 4, wherein the ratio D1 / D2 is 0.85 or more.   The punching device according to any one of claims 1 to 5, wherein the difference f is 2 mm or less.   The cam driver and the cam slide have sliding surfaces that are in sliding contact with each other, and the drilling punch pierces the perforated material by the projection, and the projection inserted into the pierced hole causes the drilled material of the perforated material. The hole according to any one of claims 1 to 6, wherein a through hole is formed in the perforated material by breaking the perforated material around the end face of the punch body in a state where movement is restricted. Dawn device.

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