JP3884519B2 - Hole drilling tool and auxiliary equipment for deburring and chamfering auxiliary tools - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drilling tool capable of removing burrs generated on the front and back of a steel plate, etc. simultaneously with the drilling when a hole is made in a steel plate, copper plate, aluminum plate, etc. by a tool having a dedicated drilling blade or a drill. The present invention also relates to a mounting device for a double-side deburring / chamfering auxiliary cutter.
[0002]
[Prior art]
Drilling of steel plates is performed using a drill for drilling, and the burrs on the front and back of the steel plate that are generated during drilling must obtain appropriate tightening force and friction force when tightening the steel plate with bolts, rivets, etc. In addition, since it affects the adhesion of the paint for rust prevention and causes a problem in quality, it is essential to remove the burr appropriately. In view of this, a drilling tool capable of simultaneously performing drilling and deburring of the front and back surfaces of the steel sheet is already used.
[0003]
FIG. 8 is a view showing a drilling tool described in Japanese Patent Application Laid-Open No. 7-68409, in which FIG. 8 (a) is a cutaway front view of the main part, and FIG. 8 (b) is a bottom view.
[0004]
In the drilling tool, a groove 1a is engraved on the peripheral surface of the distal end portion of the tool main body 1 provided with a drilling blade 2 for drilling, almost parallel to the axis of the tool main body 1, and the proximal end side of the groove 1a is set to the tool side. A connecting member 4 that is constrained to the main body 1 and has a distal end as a free end is provided, and the tip of the connecting member 4 can protrude from the peripheral surface of the tool main body 1 by elastic deformation of the connecting member 4 in the radial direction of the tool main body 1. An auxiliary cutter 3 for chamfering is provided.
[0005]
FIG. 9 is a diagram showing the situation from the beginning to the middle of making a hole in a steel plate.
[0006]
As the tool main body 1 advances, the burrs 5a are generated from the surface side of the steel plate 5 by the perforating blade 2 as shown in FIG. 1A, but from the cutting surface (blade edge surface) of the perforating blade 2. The auxiliary cutting tool 3 slightly behind removes this burr 5a.
[0007]
Subsequently, as shown in FIG. 5B, the burr 5a is removed while the tip surface of the auxiliary cutter 3 abuts against the edge between the hole 5c to be opened and the surface, and the chamfer of the peripheral portion of the edge is cut. To do.
[0008]
As shown in FIG. 2C, the connecting member 4 bends inward of the body 1 as the tool body 1 advances, and thereby the protruding portion of the auxiliary cutter 3 is pushed into the groove 1a.
[0009]
FIG. 10 is a diagram showing a state immediately after the hole has penetrated.
[0010]
As shown in FIG. 5A, immediately after the perforating blade 2 penetrates the steel plate 5, a burr 5b is generated on the back side of the steel plate 5, and the tool body 1 advances and the tip of the auxiliary cutter 3 is a hole. If the lower end opening edge of 5c is passed, the auxiliary blade 3 jumps out of the hole 5c as shown in FIG. 5B due to the inclination of the upper surface of the auxiliary blade 3 and the restoration of the connecting material 4, and after the drilling is finished, When the main body 1 is raised, the auxiliary blade 3 removes the back side burr 5b. As shown in FIG. 10 (b), the auxiliary cutter 3 again enters and rises into the hole 5c while removing the base part of the burr 5b. Returns to its original position. For this reason, the auxiliary cutter 3 moves while following from the back surface side to the front surface side of the steel plate 5, and the generation surface of the burrs 5a and 5b can be cut again, and refined chamfering becomes possible.
[0011]
[Problems to be solved by the invention]
FIG. 11 is a diagram schematically showing a state in which the auxiliary blade is immersed with the drilling tool described in the publication.
[0012]
The burr generated when the hole 5c is opened in the steel plate 5 by the perforating blade 2 is cut off by the chamfering auxiliary blade 3, and when the chamfering of the steel plate surface is finished, the auxiliary blade 3 is elastically deformed by the connecting material due to its shape effect. Immerse into the groove 1a of the drill. In that case, the movement of the cutting edge of the auxiliary cutting tool 3 attached to the drill being drilled is the angle between the cutting edge of the auxiliary cutting tool 3 and the chamfering of the steel plate as the auxiliary cutting tool 3 is immersed (i), (b), It changes slowly as shown in (c). At this time, in order for the auxiliary cutting tool 3 to be immersed in the groove 1a, the auxiliary cutting edge cannot be immersed unless the cutting edge of the auxiliary cutting edge is cut off. In that case, an excessive force is applied to the tip of the auxiliary cutter 3, and as a result, the auxiliary cutter edge may be damaged.
[0013]
Further, as shown in FIG. 10 (b), after the drill 1 penetrates the steel plate 5, when the drill 1 moves up, the back surface burr 5b of the steel plate 5 is excised with the auxiliary blade 3, but the series of steps is performed. In order to shorten the time, the drill 1 may be pulled out from the hole 5c at a higher speed than the feed speed at the time of drilling. At that time, the auxiliary cutter 3 may be damaged by an impact when the auxiliary cutter 3 hits the steel plate 5 at a high speed without being able to make the immersion of the auxiliary cutter 3 into the groove 1a of the drill 1 in time.
[0014]
FIG. 12 is a diagram schematically showing a state where the auxiliary cutting tool is immersed in the groove of the drill.
[0015]
After the chamfering of the steel plate by the auxiliary blade 3 is completed, as shown in FIG. 9C, the drill 1 continues drilling the steel plate 5 with the auxiliary blade 3 immersed in the groove 1a of the drill 1. At this time, the protruding end of the auxiliary blade 3 is pressed against the inner wall of the perforation 5 c of the steel plate 5 by the bending of the connecting material 4.
[0016]
In this case, when the shape of the protruding end portion of the auxiliary cutting tool 3 is different from the inner wall shape of the perforation 5c of the steel plate 5, the area of the contact portion between the protruding end portion of the auxiliary cutting tool 3 and the inner wall of the drilling 5c is reduced, Scratches occur.
[0017]
Further, the drilling distance of the drill 1 is preferably the same as that in the case of drilling the steel plate 5 with a normal drill, but the drill 1 having the auxiliary blade 3 has a drawback that the drilling distance is longer than that of a normal drill.
[0018]
Moreover, when the steel plate 5 is drilled with the drill 1, the back surface burr 5b is generally larger than the front surface burr 5a, and the drill 1 having the auxiliary blade 3 is deburred and chamfered on the front and back in the same process as the drilling. However, the rotational direction of the drill 1 that is relatively received during the drilling and pulling of the auxiliary cutter 3 during front / back deburring and chamfering is opposite, and the force received by the auxiliary cutter 3 and the connecting material 4 Because of the reverse, there is a difference in the finish of the front and back of the deburring and chamfering.
[0019]
The present invention provides a drilling tool and a double-side deburring / chamfering auxiliary blade mounting device that can easily remove burrs on both the front and rear surfaces of a steel plate or the like with a simple structure and prevent the loss of the auxiliary blade. is there.
[0020]
[Means for Solving the Problems]
According to the present invention, a groove is formed in a peripheral surface of a tip portion of a tool body provided with a cutting blade for drilling so as to be opened in the tip surface substantially parallel to the axis of the tool body, and a base end is formed inside the groove. A connecting member having a side pivotally supported on the tool body and having a distal end side as a free end is provided, and a spring for urging the connecting member toward the outside is provided at a distal end portion of the connecting member. A deburring / chamfering auxiliary cutting tool that partially protrudes from the peripheral surface and that can be inserted into the concave groove from the peripheral surface of the tool main body, and the auxiliary cutting tool is a cutting edge of the cutting blade for drilling in punching tool consisting positioned in the vicinity of the surface, the U-shaped groove to the open end of the peripheral surface of the elongated hole or the tool body diameter direction is longer diameter of the tool body to the proximal end side of the connecting member It is characterized by that.
[0022]
Furthermore, we preferred that the side cutting edge angle of the surface deburring, chamfering cutting edge larger than the side cutting edge angle of the back surface deburring, chamfering cutting edge in the auxiliary tool.
[0023]
The auxiliary cutting tool for double-sided deburring and chamfering according to the present invention has a recess that opens to the tip surface of the tool body provided with a cutting blade for drilling and is open to the tip surface substantially parallel to the axis of the tool body. A mounting device for a double-sided deburring and chamfering auxiliary cutter incorporated into the concave groove, wherein the base plate has a base plate on the base end side and the base end side is pivotable about the base member. A connecting material having a free end on the supporting tip side, and a spring that urges the connecting plate and the connecting material toward the separating direction are sandwiched between the connecting plate and the connecting material. In a double-side deburring / chamfering auxiliary cutter mounting device integrally provided with a deburring / chamfering auxiliary cutting tool mounting surface having a surface parallel to the urging direction, a tool body provided on the base end side of the connecting material is provided. A long hole with the long diameter in the diameter direction or a U-shape with the open end on the peripheral surface side of the tool body And a shaft support portion pivotally supported by a pin of a flange member formed on the base end side of the base plate, wherein the pin provided on one side surface of the flange member and the long hole or the U-shaped groove Is engaged .
[0024]
A pivotal support that pivotally supports the base end side of the connecting material and the upper side of the rigid member of the base plate, with pins provided on both side surfaces on one side and an upper surface on the other side as open ends. It is preferable to engage the U-shaped groove for receiving the pin.
[0025]
Also, the tool body provided with a cutting blade at the tip, or a tool body with a torsion groove provided with a cutting blade at the tip, or a peripheral surface of the tip of the tool body of a rod-shaped body was provided along the axial direction. A double-side deburring and chamfering auxiliary cutting tool is located inside the concave groove near the bottom of the concave groove and in the vicinity of the tip of the tool body. You may attach so that the protrusion part of this auxiliary cutter may be immersed in the said ditch | groove from the surrounding surface of a tool main body.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a view showing a first embodiment of a drilling tool according to the present invention, and is a cut-away sectional view of an essential part.
[0027]
Two drilling blades 2 of brazing or throwaway type are attached to the tip of a tool body 1 (hereinafter referred to as “body”) having a shank connected to a rotating spindle of a cutting machine or the like formed on the base end side. Yes. These perforating blades 2 occupy a partial region in the circumferential direction of the body 1 and are fixed, and the outer peripheral surface at a position not interfering with the cutting edge portion of the perforating blade 2 is substantially parallel to the axis of the body 1 from the tip. A groove 1a is provided at the front end surface. Then, a mounting device for the auxiliary cutter 3 having a connecting member 4 having a deburring / chamfering auxiliary cutter 3 for removing and removing the burrs at the tip is incorporated in the groove 1a.
[0028]
FIG. 2 is a perspective view of the auxiliary blade attaching device of the present invention.
[0029]
One end of the metal connecting member 4 has an inclined surface whose one surface is inclined upward and the other surface is inclined downward, and a surface parallel to a biasing direction by a spring 6 described later is provided at the tip of the connecting member 4. A mounting portion 4 a for the auxiliary cutter for double-sided deburring and chamfering is integrally provided, and a rotation support pin hole 9 is formed on the base end side of the connecting member 4.
[0030]
The rotation support pin hole 9 in the shaft support portion of the connecting member 4 is rotatably supported by the pin 8b of the rigid member 8a formed on the base end side of the base plate 8. The rotation support pin hole 9 may be provided in the rigid member 8 a and the pin 8 b may be provided in the connecting material 4.
[0031]
The shaft support portion of the connecting member 4 is formed with a rotation support pin hole 9 in a long hole whose longitudinal direction is the diameter direction of the body 1 or a U-shaped groove 9 having an open end on the peripheral surface side of the body 1.
[0032]
A part of the auxiliary cutter 3 fixed to the attachment portion 4a of the auxiliary cutter 3 is sandwiched between the springs 6 biased in the separating direction at the respective distal end portions of the base plate 8 and the connecting member 4 and the outer peripheral surface of the body 1 Adjust so that it sticks out more.
[0033]
The attachment device for the auxiliary cutter 3 for deburring and chamfering on both sides is such that the base plate 8 is located in the bottom of the groove 1a and in the vicinity of the tip of the body 1 inside the groove 1a provided in the body 1. After the auxiliary blade 3 is positioned, a screw 1b is inserted into a screw hole that is slightly inclined from the axial direction of the body 1 in the vicinity of the concave groove 1a and reaches the bottom of the concave groove 1a, and is tightened. The side edge is pressed by the tip of the screw, or the wedge screw 1b is inserted into the screw hole and tightened, and the side of the base plate 8 is pressed against the inner wall of the groove 1a by the tapered head of the wedge screw. By adhering to the body 1, the protruding end portion of the auxiliary blade 3 of the attachment portion 4 a is attached from the peripheral surface of the body 1 so as to be able to be immersed in the recessed groove 1 a by pressing from the outside of the body 1. The body 1 may be a tool body provided with a cutting blade at the tip, a tool body with a twisted groove provided with a cutting blade at the tip, or a rod-like tool body.
[0034]
FIG. 3 is a view showing a state in which the auxiliary blade of the drilling tool of the present invention is immersed.
[0035]
Since the shaft support portion of the connecting member 4 is formed with a rotation support pin hole 9 as a long hole with the diameter direction of the body 1 as the long diameter or a U-shaped groove with the peripheral surface side of the body 1 as an open end, the body 1 As the process proceeds, from the state shown in FIG. 3 (a), the shape of the auxiliary blade 3 as shown in FIG. 3 (b) is used to immerse the pin 8b against the force of the spring 6 and to form a U-shape. The change in the contact angle of the auxiliary blade 3 can be reduced by sinking the proximal end side of the connecting material 4 by the rotation support pin 9 formed in the groove, and damage to the cutting edge of the auxiliary blade 3 can be reduced.
[0036]
Figure 4 shows a reference example of the mounting device of the auxiliary tool 3, FIG. 4 (a) is a perspective view, FIG. 4 (b) state in which the auxiliary tool 3 into contact with the burr, FIG. 4 (c) Auxiliary tool 3 4 (d) is a view showing a state in which the hole 5c is in contact with the periphery of the hole 5c. FIG. 4 (d) is a view showing a state in which the auxiliary blade 3 is inserted into the attachment portion 4a of the auxiliary blade 3 at the tip of the connecting member 4. A spring having an elastic constant that is slightly larger than the back component force required for the auxiliary cutter 3 and is supported by the pin 10 so as to be rotatable in the inner direction. 11, and a rotation stop member 12 when the auxiliary blade 3 comes into contact with the surface deburring and chamfering cutting blade is provided on the connecting member 4.
[0037]
As shown in FIG. 4B, after the drilling is completed and the auxiliary blade 3 passes through the hole 5c, the auxiliary blade 3 is in a state where a part of the auxiliary blade 3 protrudes from the outer peripheral surface of the body 1, and then in the reverse direction. After proceeding to contact with the burr 5b and deburring, when the body 1 starts to be pulled out at a high speed, as shown in FIG. 4C, when the auxiliary blade 3 hits the periphery of the hole 5c, the auxiliary blade 3 is moved to the body 1. , In the direction around the front end side and into the groove 1a as shown in FIG. 4 (d). Since the auxiliary cutter 3 enters the groove 1a while rotating, the impact when the auxiliary cutter 3 hits the steel plate 5 at a high speed can be mitigated, and damage to the auxiliary cutter 3 can be prevented.
[0038]
Figure 5 shows a reference example of the auxiliary tool 3 schematically, FIG. 5 (a) is a plan view, the cutting edge for at FIG. 5 (b) cross-sectional view, drilling the shape of the protrusion of the auxiliary tool 3 The outer shape of the contact portion in contact with the perforated inner wall 5d formed by 2 is matched with the shape of the perforated inner wall 5d. Thereby, the area of the contact part of the protrusion part of the auxiliary cutter 3 and the drilled inner wall 5d is increased, and the generation of scratches on the drilled inner wall surface can be prevented.
[0039]
FIG. 6 is a cross-sectional view showing another embodiment of the auxiliary cutter of the present invention, wherein the side cutting angle of the surface deburring and chamfering cutting edge in the auxiliary cutting tool 3 is larger than the side cutting angle of the back side deburring and chamfering cutting edge. Enlarge. Thereby, the difference in the finish of the front and back can be reduced.
[0040]
Figure 7 is a sectional view showing a reference example of auxiliary blades 3, surface deburring of the auxiliary blade 3, as the side cutting edge angle of the chamfering cutting edge and the hole drilled for the cutting blade 2 is substantially coincides or matches The auxiliary blade 3 is fixed.
[0041]
If the auxiliary cutter 3 is attached to the tip of the drill or the tool body 1 as much as possible, the penetration distance required for chamfering the back surface of the steel plate 5 can be shortened, and the drilling distance of a normal drill can be approached. In this embodiment, by making the edge angle of the auxiliary cutting tool 3 the same as the cutting edge angle of the drill, the cutting edge of the auxiliary cutting tool 3 can be brought close to the tip of the drill, and in particular, the drill penetration distance necessary for chamfering the back surface is increased. Can be reduced. However, when the auxiliary cutter 3 is immersed, if a part of the auxiliary cutter 3 jumps out from the tip of the perforated blade 2, the auxiliary cutter 3 is prevented from jumping out from the tip of the perforated blade 2.
[0042]
【The invention's effect】
(1) The shaft support part of the connecting material is formed with a rotation support pin hole as a long hole with the diameter direction of the tool body as the long diameter or a U-shaped groove with the peripheral surface side of the tool body as an open end. Since the connecting material sinks, it is possible to reduce the change in angle when the auxiliary blade is immersed in the hole, and to prevent the cutting edge of the auxiliary blade from being lost.
[0043]
(2) After the deburring of the back surface, the auxiliary cutter enters the groove while rotating against the steel plate at high speed, so that the impact can be mitigated and the auxiliary cutter can be prevented from being damaged.
[0045]
(3) Since the side cutting angle of the surface deburring and chamfering cutting edge of the auxiliary cutter is larger than the side cutting angle of the backside deburring and chamfering cutting edge, the difference in finish between the front and back deburring and chamfering is reduced. be able to.
[0047]
(4) The auxiliary cutter can be easily incorporated into the groove of the tool body by means of a double-side deburring and chamfering auxiliary cutter mounting device that pivotally supports a connecting material with the auxiliary cutter attached to the rigid member of the base plate. Can do.
[Brief description of the drawings]
FIG. 1 is a view showing a first embodiment of a drilling tool according to the present invention, and is a cut-away sectional view of an essential part.
FIG. 2 is a perspective view of the auxiliary blade attachment device of the present invention.
FIG. 3 is a view showing a state in which the auxiliary blade of the drilling tool of the present invention is immersed.
Figure 4 shows a reference example of the mounting device of the auxiliary tool 3, FIG. 4 (a) is a perspective view, FIG. 4 (b) state in which the auxiliary tool 3 into contact with the burr, and FIG. 4 (c) FIG. 4D is a view showing a state in which the auxiliary blade 3 is in contact with the peripheral edge of the hole 5c, and FIG.
[5] The reference example of the auxiliary tool shown schematically, FIG. 5 (a) is a plan view, FIG. 5 (b) is a cross-sectional view.
FIG. 6 is a cross-sectional view showing another embodiment of the auxiliary blade of the present invention.
7 is a sectional view showing a reference example of the auxiliary tool.
8A and 8B are diagrams showing a conventional drilling tool, in which FIG. 8A is a cutaway front view of the main part, and FIG. 8B is a bottom view.
FIG. 9 is a diagram showing the situation from the beginning to the middle of making a hole in a steel plate.
FIG. 10 is a diagram showing a state immediately after a hole has penetrated.
FIG. 11 is a diagram schematically showing a state in which an auxiliary cutting tool is immersed with a conventional drilling tool.
FIG. 12 is a diagram schematically showing a state where the auxiliary blade is immersed in the groove of the drill.

Claims (4)

On the peripheral surface of the distal end portion of the tool body provided with a cutting blade for drilling, a groove is formed by opening the groove on the distal end surface substantially parallel to the axis of the tool body, and the proximal end side of the tool groove is formed in the groove. A connecting member pivotally supported on the main body and having a distal end side as a free end is provided, and a spring that urges the connecting member toward the outside is provided from the peripheral surface of the tool main body to the distal end portion of the connecting member. A part of the tool body is provided with an auxiliary cutting tool for deburring and chamfering that can be inserted into the groove from the peripheral surface of the tool body, and the auxiliary cutting tool is provided in the vicinity of the cutting edge surface of the cutting blade for drilling. In the drilling tool that is located,
A drilling tool comprising a long hole having a long diameter in the diameter direction of the tool body or a U-shaped groove having an open end on a peripheral surface side of the tool body on the base end side of the connecting material. On the peripheral surface of the distal end portion of the tool body provided with a cutting blade for drilling, a groove is formed by opening the groove on the distal end surface substantially parallel to the axis of the tool body, and the proximal end side of the tool groove is formed in the groove. A connecting member pivotally supported on the main body and having a distal end side as a free end is provided, and a spring that urges the connecting member toward the outside is provided from the peripheral surface of the tool main body to the distal end portion of the connecting member. A part of the tool body is provided with an auxiliary cutting tool for deburring and chamfering that can be inserted into the groove from the peripheral surface of the tool body, and the auxiliary cutting tool is provided in the vicinity of the cutting edge surface of the cutting blade for drilling. In the drilling tool that is located,
A drilling tool characterized in that a side cutting edge angle of a cutting edge for surface deburring and chamfering in the auxiliary cutter is larger than a side cutting edge angle of a cutting blade for backside deburring and chamfering. Deburring / chamfering on both sides of the tool body with a cutting blade for drilling. An auxiliary blade attaching device for a base, comprising a base plate having a flange member on the base end side, a connecting member having the base end side pivotally supported by the flange member and having a distal end side as a free end, and the base plate And a chamfering auxiliary cutter having a surface parallel to the urging direction of the connecting member at the tip of the connecting material. In the mounting device for the auxiliary cutter for double-sided deburring and chamfering with the mounting part of
A long hole having a long diameter in the diameter direction of the tool body provided on the base end side of the connecting material, or a U-shaped groove having an open end on the peripheral surface side of the tool body, and formed on the base end side of the base plate A double-sided deburring mechanism, which is a shaft support portion pivotally supported by a pin of the flange member, wherein the pin provided on one side surface of the flange member is engaged with the long hole or the U-shaped groove. Chamfering auxiliary blade mounting device. Tool body with a cutting blade at the tip, or a tool body with a torsion groove with a cutting blade at the tip, or a concave groove provided along the axial direction on the peripheral surface of the tip of the rod-shaped tool body The base plate is located at the bottom of the groove , and the double-side deburring and chamfering auxiliary blade is located near the tip of the tool body and is pressed by the outside of the tool body in a fixed state. 4. The apparatus for mounting a double-sided deburring / chamfering auxiliary cutter according to claim 3, wherein the protruding end of the auxiliary cutter is attached so as to be able to be inserted into the concave groove from the peripheral surface of the tool body.

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