JP5304283B2 - Cross-cross burr removal method and cross-cross burr removal device - Google Patents

Description

  The present invention relates to a cross burr removal method and a cross burr removal apparatus.

  As a method of removing the facing burrs that occur at the intersection of the cross holes formed in the workpiece, for example, the tip side of the deburring tool that enters the hole is tilted in the hole with respect to the tool axis, and rotates eccentrically. Thus, there has been proposed a method of removing burrs by eccentric turning of a grinding blade formed at a tool tip.

JP 2003-117787 A

  However, in the technique of Patent Document 1, since the tip end side of the deburring tool is tilted in the hole with respect to the tool axis and is eccentrically rotated, the burr may not be removed and a return burr may occur. Further, in the technique of Patent Document 1, since the shape of burrs generated at the intersections of the intersection holes is complicated, burrs cannot be completely removed, and deburring is performed by a dedicated machine.

  Therefore, the present invention provides a cross-over burr removal method and a cross-over burr removal device that can remove a burr generated at an intersection of an intersection hole without causing a return burr.

  In the cross burr removal method of the present invention, the deburring tool having a round bar shape has a notch portion along the axial direction from the tip of the deburring tool, and a first cutting blade is provided at a side edge of the notch portion and the tip. The deburring tool provided with the second cutting blade is inserted into one of the cross holes so that the first burr generated before the tool insertion direction enters the notch, and the tool tip is moved to the second burr. After stopping the tool entry at a position in front of the tool, rotate the deburring tool around the axis to remove the first burr in the notch with the first cutting blade, and rotate the deburring tool. It sends to the front and a 2nd cutting blade removes a 2nd burr | flash.

  In the crossing burr removing device of the present invention, the deburring tool for removing the first burr and the second burr generated at the crossing portion of the crossing hole is extended along the axial direction from the tip of the tool body having a round bar shape. A first cutting blade formed on a side edge of the notch portion for removing the first burr entering the notch portion by rotating the tool body, and a hole depth of the first burr And a second cutting blade formed at the tip of the tool body for removing the second burrs generated in the tool.

  According to the cross burr removal method of the present invention, the first burr generated before the tool insertion direction is caused to enter the notch formed along the axial direction from the front end of the deburring tool, and the tool front end becomes the first end. 2 After stopping the tool entry at a position just before contacting the burr, the deburring tool is rotated around the axis, so that the first burr in the notch is provided on the side edge of the notch. It can be removed by rotation of one cutting blade. In addition, according to the method of the present invention, the second burr facing the depth of the hole of the first burr is removed by the second cutting blade that is sent forward while rotating the deburring tool and provided at the tip of the tool. The blade is removed while pushing the second burr. Therefore, according to the crossing burr removal method of the present invention, it is possible to remove the burrs generated in the facing of the complicated cross holes in a state that can be processed only from one direction, and thereby the deburring operation time. Can be shortened and productivity can be improved.

  According to the cross burr removal device of the present invention, the first burr that enters the notch formed along the axial direction from the tip of the tool body is formed on the side edge of the notch that is removed by rotating the tool body. Since the first cutting blade and the second cutting blade formed at the tip of the tool body for removing the second burr generated in the back of the hole of the first burr are provided, the first cutting blade is used for each cutting blade. The burr and the second burr can be removed without generating a return burr.

1A and 1B show a crossing burr removing device of this embodiment, where FIG. 1A is a plan view, FIG. 1B is a rear view thereof, and FIG. 1C is a side view thereof. FIG. 2 is a perspective view of a deburring tool used in the deburring device opposite to the cross in FIG. 3 shows the deburring tool of FIG. 2, (A) is a front view thereof, (B) is a left side view thereof, and (C) is a plan view thereof. FIG. 4 is a perspective view of a knuckle steering, which is a workpiece to be mounted on the cross-burr removal device of this embodiment. FIG. 5 shows a process for forming a cross hole in the knuckle steering, (A) is a process diagram for drilling one hole, (B) is a process diagram for drilling the other hole, and (C) is a cross process hole. (D) is a process diagram for reaming the other intersecting hole, and (E) is a process diagram for reaming one intersecting hole. FIG. 6 is a flowchart of the deburring operation of the deburring method for crossing the crossing according to this embodiment. FIG. 7 is an overall view showing a state before deburring. FIG. 8 is a perspective view when the state before the deburring process is viewed from the deburring tool insertion side. FIG. 9 is a cross-sectional view of a state in which the deburring tool is advanced into the second hole so that the first burr enters the notch, and the tool entry is stopped at a position before the tip of the tool contacts the second burr. It is. FIG. 10 shows a state in which the deburring tool is rotated to remove the first burr in the notch with the first cutting blade, and the deburring tool is rotated and sent forward to remove the second burr with the second cutting blade. It is sectional drawing.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

“Description of the structure of the deburring device across the street”
First, a crossing burr removing device will be described with reference to the drawings. 1A and 1B show a cross-burr removal apparatus of the present embodiment, FIG. 1A is a plan view thereof, FIG. 1B is a rear view thereof, FIG. 2C is a side view thereof, and FIG. 3 is a perspective view of the deburring tool used in FIG. 3, FIG. 3 shows the deburring tool of FIG. 2, (A) is a front view thereof, (B) is a left side view thereof, (C) is a plan view thereof, FIG. FIG. 5 is a perspective view of a knuckle steering, which is a workpiece to be mounted on the cross-burr removal device of this embodiment, FIG. 5 shows a machining process for forming a cross hole in the knuckle steering, and (A) drills one hole. (B) is a process diagram for drilling the other hole, (C) is a process diagram for slitting with a cutter so as to reach the cross hole, and (D) is a process for reaming the other cross hole. FIG. 5E is a process diagram for reaming one of the cross holes.

  As shown in FIG. 1, the deburring device for crossing according to the present embodiment is deburred by a holder 3 of an automatic tool changer with respect to a knuckle steering 2 which is a workpiece positioned and fixed on a fixing base 1 of a machining center. The tool 4 is mounted, and the deburring tool 4 is inserted into one of the cross holes formed in the knuckle steering 2 according to a computer numerical control command. 2 Remove burrs.

  As shown in FIGS. 2 and 3, the deburring tool 4 is made of, for example, a superhard material having high hardness, and is formed as a round bar having an outer diameter size that is fitted into one hole. A first cutting blade 5 and a second cutting blade 6 are provided on the tip side of the deburring tool 4.

  The 1st cutting blade 5 is provided in the side edge of the notch part 7 formed along an axial direction toward a tool rear end from a tool front-end | tip. The notch portion 7 is formed as an elongated hole having an opening width W and an opening depth H that can accommodate the first burr among the burrs generated facing each other at the intersection of the intersecting holes described later. Has been. The first cutting blade 5 is formed along the axial direction from one end of the opening of the cutout portion 7 to the vicinity of the end of the cutout portion 7. Therefore, the 1st cutting blade 5 removes a burr | flash, when the deburring tool 4 rotates to a circumferential direction centering on an axial center.

  The 2nd cutting blade 6 is provided in the tool front-end | tip periphery used as a round bar. The second cutting blade 6 is removed by pushing the second burr generated by facing the back of the hole of the first burr by advancing the deburring tool 4 into the hole. The second cutting blade 6 is not formed over the entire circumference of the tool tip, and does not have a blade at a portion where the notch portion 7 is provided.

  The rear end side portion of the deburring tool 4 is a mounting portion 8 that is chucked to the holder 3 of the automatic tool changer.

  The knuckle steering 2 is a component that constitutes a suspension for an automobile in which a tire is attached using a hub (a portion to which a tire is attached). As shown in FIG. 4, the knuckle steering 2 is formed with two holes 9 and 10 for fastening with the upper link as cross holes. Hereinafter, one hole 9 is referred to as a first hole 9 and the other hole 10 is referred to as a second hole 10.

  The first hole 9 and the second hole 10 are formed by sequentially performing a drilling process and a reaming process shown in FIG. First, as shown in FIG. 5 (A), the first hole 9 is passed through the tip of the knuckle steering 2 along the vehicle height direction by the first drill 11. Next, as shown in FIG. 5B, the second drill 12 penetrates the second hole 10 through a part of the first hole 9 in the direction perpendicular to the first hole 9 at the tip of the knuckle steering 2. Let

  Next, as shown in FIG. 5C, a slit 14 is formed from the tip of the knuckle steering 2 to the first hole 9 by the cutter 13. Next, as shown in FIG. 5D, the first reamer 15 is passed through the second hole 10 to increase the dimensional accuracy of the hole. Similarly, as shown in FIG. 5E, the second reamer 16 is passed through the first hole 9 to increase the dimensional accuracy of the hole.

  When the last reamer processing is completed, the first burr 17 and the second burr 18 are generated facing each other at the intersection of the first hole 9 and the second hole 10 which are formed as the intersecting holes, for example, as shown in FIG. . The first burr 17 and the second burr 18 are portions of the first hole 9 that intersect with the second hole 10, and project into the second hole 10 at a peripheral edge portion that first communicates with the second hole 10. To occur. A burr generated on the front end side in the tool insertion direction when the deburring tool 4 is inserted into the second hole 10 is referred to as a first burr 17, and a burr generated on the back side is referred to as a second burr 18.

"Explanation of burr removal method across the intersection"
Next, the burr removal method across the intersection will be described. In the deburring process, the above-described cross-deburring device is used. FIG. 6 is a flowchart of the deburring operation of the cross burr removal method of the present embodiment, FIG. 7 is an overall view showing a state before the deburring process, and FIG. FIG. 9 is a perspective view, and FIG. 9 shows a state where the tool entry is stopped at a position before the tool tip comes into contact with the second burr so that the first burr enters the notch and the tool tip enters the second hole. FIG. 10 is a cross-sectional view of FIG. 10, in which the deburring tool is rotated, the first cutting blade is used to remove the first burrs in the notch, and the deburring tool is rotated forward to feed the second burrs with the second cutting blade. It is sectional drawing of the state removed.

  In order to remove the first burr 17 and the second burr 18, the process of step S1 of the deburring operation flowchart of FIG. 6 is performed. In step S1, the deburring tool 4 mounted on the holder 3 of the automatic tool changer is fast-forwarded with respect to the knuckle steering 2 clamped on the fixed base 1 of the machining center (front approach of the second hole 10 (approach). Position). The movement of the deburring tool 4 to the approach position is performed by a program by computer numerical control of the machining center. A state where the deburring tool 4 is moved to the approach position with respect to the knuckle steering 2 is shown in FIGS.

  Next, step S2 of the deburring operation flowchart of FIG. 6 is performed. In the process of step S2, as shown in FIG. 9, the direction is determined so that the first burr 17 generated before the tool insertion direction enters the notch 7, and the deburring tool 4 enters the second hole 10. Let At this time, the deburring tool 4 is caused to enter the second hole 10 from the approach position while the spindle for moving the deburring tool 4 is stopped (linear interpolation). That is, the main shaft is linearly moved so as to enter the second hole 10 without rotating the deburring tool 4. As a result, the first burr 17 enters the notch 7.

  Next, step S3 of the deburring operation flowchart of FIG. 6 is performed. In step S3, the tool entry is stopped at a position before the tool tip of the deburring tool 4 contacts the second burr 18. FIG. 9 shows the stop position. In FIG. 9, the position where the tool tip has reached almost the center of the first hole 9 is the stop position of the deburring tool 4.

  Next, step S4 of the deburring operation flowchart of FIG. 6 is performed. In the process of step S4, the deburring tool 4 is sent forward while rotating. At this time, the machining center sends the deburring tool 4 to a specified point while rotating it in a tap cycle that synchronizes rotation and feed. When the deburring tool 4 rotates about the axis, the first burr 17 in the notch 7 is a first cutting blade 5 that is a side blade formed on the opening periphery of the notch 7. Removed by. Thus, since the 1st burr | flash 17 exists in the state inserted in the notch part 7, by rotating the deburring tool 4 centering on an axial center, the 1st cutting blade 5 which is a side blade is made to become. To be removed. In the deburring tool 4 that has only the second cutting blade 6 at the tip of the tool without the notch 7 and the first cutting blade 5, the deburring tool 4 is simply pushed into the second hole 10. As a result, the first burr 17 cannot be removed, and the burr returned to the first hole 9 becomes a burr.

  When the tip of the deburring tool 4 whose rotation and feed are synchronized reaches the position of the second burr 18, the second cutting blade 6 provided at the tip of the tool is removed while pushing the entire second burr 18 forward. At this time, if the deburring tool 4 is not rotated, there is no part of the second cutting blade 6 due to the notch 7, and therefore the second burr 18 is left behind at the portion without the blade. However, in this embodiment, since the deburring tool 4 is rotated, the second burr 18 can be removed without leaving the second cutting blade 6 even if the notch 7 is formed. . FIG. 10 shows a state where the second burr 18 is removed.

  Next, step S5 of the deburring operation flowchart of FIG. 6 is performed. In step S5, when the second burr 18 is removed and the tip of the tool reaches a position where it slightly protrudes from the first hole 9, that is, when the tool tip reaches a specified point, the deburring tool 4 is started (see FIG. 9). To the stop position of the deburring tool 4 which is substantially the center of the first hole 9 shown in FIG.

  Finally, the process of step S6 in the deburring operation flowchart of FIG. 6 is performed. In step S6, the deburring tool 4 is moved to the front position (approach position) of the second hole 10 by rapid traverse. This completes the deburring operation.

"Effect of this embodiment"
As described above, according to the cross burr removal method of the present embodiment, the first burr generated in the notch portion 7 formed along the axial direction from the tip of the deburring tool 4 before the tool insertion direction. 17 is entered, and the tool entry is stopped at a position before the tool tip comes into contact with the second burr 18, and then the deburring tool 4 is rotated. Therefore, the first burr 17 in the notch 7 is It can be removed by rotation of the first cutting blade 5 which is a side blade provided on the side edge of the notch 7. Thereby, according to this embodiment, it can cut off without leaving the 1st burr | flash 17 left.

  Further, according to the method of the present invention, the second burr 18 facing the back of the hole of the first burr 17 is sent forward while rotating the deburring tool 4 about the axis, and the second cutting blade provided at the tool tip. Therefore, the second cutting blade 6 is removed while pushing the second burr 18.

  Therefore, according to the crossing burr removal method of the present invention, it is possible to remove the burrs generated in the facing of the complicated cross holes in a state that can be processed only from one direction, and thereby the deburring operation time. Can be shortened and productivity can be improved. Further, according to the present embodiment, the efficiency of the deburring operation can be further enhanced by automating the deburring operation using the machining center.

  According to the cross burr removal apparatus of the present invention, the first burr 17 that enters the cutout portion 7 formed along the axial direction from the tip of the tool body is removed by rotating the tool body. Since the first cutting blade 5 formed on the edge and the second cutting blade 6 formed on the tip of the tool body for removing the second burr 18 generated in the back of the hole of the first burr 17, The first burr 17 and the second burr 18 can be returned and removed together without generating a burr.

  Further, in this embodiment, the deburring tool 4 is not eccentrically rotated with respect to the shaft center but rotated, but the deburring tool 4 is linearly interpolated. Therefore, a general-purpose machining center is used instead of a dedicated deburring machine. can do. Therefore, the apparatus cost can be greatly reduced as compared with the case where a dedicated deburring machine is used.

  As mentioned above, although embodiment mentioned above was described, the said embodiment is an example of this invention and this invention is not restrict | limited to these embodiment.

  INDUSTRIAL APPLICABILITY The present invention can be used for a technique for removing facing burrs that are generated at intersections of intersection holes formed in a workpiece.

1 ... Fixing base for machining center 2 ... Knuckle steering (workpiece)
DESCRIPTION OF SYMBOLS 3 ... Machining center holder 4 ... Deburring tool 5 ... 1st cutting blade 6 ... 2nd cutting blade 7 ... Notch part 9 ... 1st hole 10 ... 2nd hole 17 ... 1st burr 18 ... 2nd burr | flash

Claims (3)

In the cross-to-cross burr removing method of removing the first burr and the second burr generated at the crossing portion of the cross hole formed in the work piece with a deburring tool inserted from one hole,
A burr having a notch portion along the axial direction from the tip of a deburring tool having a round bar shape, the first cutting blade being provided at the side edge of the notch and the second cutting blade being provided at the tip. After the cutting tool is entered into the hole so that the first burr generated before the tool insertion direction enters the notch, and the tool entry is stopped at a position before the tool tip contacts the second burr Then, the deburring tool is rotated around the axis to remove the first burr in the notch with the first cutting blade, and the deburring tool is rotated forward to feed the second burr with the second cutting blade. A method for removing burrs across a cross, which is characterized by removing. A method for removing burr across a crossing according to claim 1,
A deburring method across the cross, wherein the rotation and feed of the deburring tool are synchronized. In a cross-to-cross burr removing device that removes a first burr and a second burr that are generated facing each other at a crossing portion of a cross hole formed in a workpiece by inserting a deburring tool from one hole,
The deburring tool has a notch formed along the axial direction from the tip of a tool body having a round bar shape, and the notch for removing the first burr entering the notch by rotating the tool body. The first cutting blade formed on the side edge of the part, and the second cutting blade formed at the tip of the tool body for removing the second burr generated in the back of the hole of the first burr Deburring device across the cross.

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