JP6996398B2 - Deburring device - Google Patents

Description

The present invention relates to a deburring device capable of removing burrs formed in holes of a work to be machined.

Conventionally, a technique for removing burrs generated at the open end edge of a hole of a work to be machined has been proposed. For example, in Patent Document 1, an insertion portion having a groove is inserted into a hole in which a burr is formed, and the insertion portion is rotated so that the groove gives sliding contact or impact to the burr and removes the burr. A deburring device has been proposed.

Japanese Unexamined Patent Publication No. 2011-067897

However, since the deburring device described in Patent Document 1 is a deburring device only, it is necessary to replace the processing tool when performing other processing.
In addition, when manually removing burrs formed in holes with a relatively small inner diameter, it takes time because multiple processing tools may be used, and there is a risk of damaging parts other than burrs. , Quality deteriorates.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a deburring device capable of stabilizing quality without the need for tool replacement.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to remove burrs (9a, 9b) formed so as to protrude in the radial direction of the hole (6) of the work (1) to be machined. A deburring device such as a rotational force generating portion (15), a first rotating body (20), a cutting tool pedestal (30), a concave portion (21) and a convex portion (22), and a second rotating body ( 40) is provided.
The rotational force generating unit generates a rotational force.
The first rotating body can be rotated by the rotational force generated by the rotational force generating portion.
The cutting tool pedestal has a cutting tool (31) that can be inserted into a hole and can cut a work. The cutting tool pedestal is rotatable by the rotational force of the first rotating body and can move along the rotation axis of the first rotating body.
The concave portion and the convex portion are provided on the first rotating body and can hold the cutting tool pedestal.
The second rotating body is rotatably provided on the same axis of rotation as the first rotating body. The second rotating body can rotate together with the first rotating body independently of the rotational force generated by the rotational force generating portion.
In the deburring device of the present invention, when the second rotating body rotates in the direction opposite to the rotating direction of the rotational force generated by the rotational force generating portion due to the inertial force of the second rotating body itself, the cutting tool pedestal is formed in the recess. The cutting tool is inserted into the hole by changing the positional relationship between the first rotating body and the cutting tool pedestal so that the state of holding the cutting tool pedestal is changed to the state of holding the cutting tool pedestal at the convex portion.

In the deburring device of the present invention, when the second rotating body rotates in a direction opposite to the rotating direction of the rotational force generated by the rotational force generating portion due to the inertial force of the second rotating body itself, cutting with the first rotating body. The cutting tool is inserted into the hole by changing the positional relationship with the machine pedestal. As a result, burrs can be reliably removed by the cutting tool inserted into the hole. Therefore, since the deburring device of the present invention can reliably deburr with one type of cutting tool, the time required for the deburring work is shorter than the manual deburring work that requires tool replacement. Not only can the cutting tool be made constant, but the quality of the work can be stabilized.

It is a perspective view of the work to be processed in 1st Embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. It is a figure which shows the state of a hole and its surroundings after a groove forming process. It is sectional drawing of the deburring apparatus by 1st Embodiment. It is a flow chart of the operation of the deburring apparatus by 1st Embodiment. It is sectional drawing of the deburring apparatus in the state which the 1st rotating body by the 1st Embodiment is rotated forward. It is a schematic diagram which shows the positional relationship between the 1st rotating body and the cutting tool pedestal in the state which the 1st rotating body is rotated forward by 1st Embodiment. It is sectional drawing of the deburring apparatus in the state which the 1st rotating body was reversed according to 1st Embodiment. It is a schematic diagram which shows the positional relationship between the 1st rotating body and the cutting tool pedestal in the state which the 1st rotating body is reversed according to 1st Embodiment. It is sectional drawing of the deburring apparatus in the state which the 1st rotating body by the 2nd Embodiment is rotated forward. It is sectional drawing of the deburring apparatus in the state which the 1st rotating body was reversed according to 2nd Embodiment.

Hereinafter, embodiments of a plurality of deburring devices will be described with reference to the drawings. In the plurality of embodiments, substantially the same parts as those of the other embodiments are designated by the same reference numerals, and the description thereof will be omitted.

(First Embodiment)
FIG. 1 is a perspective view of a work to be machined. FIG. 2 is a sectional view taken along line II-II of FIG. The work 1 is, for example, an injection component of a diesel engine. The work 1 has a flat cylindrical portion 2 and a cylindrical rod-shaped portion 3 having a central axis a in common with the cylindrical portion 2.

In the present embodiment, the work 1 is drilled to form a plurality of holes 6 penetrating from the upper surface 4 to the lower surface 5 of the cylindrical portion 2 at eight positions of the cylindrical portion 2 equidistant from the central axis a. (See Fig. 2). The adjacent holes 6 are all formed at equal intervals in the circumferential direction. After that, a groove forming process is performed to form a groove 7 connecting the adjacent holes 6.

FIG. 3 is a diagram showing a state of the hole 6 and its surroundings after the groove forming process. The groove forming process is a process in which stress is applied to the upper surface 4 of the columnar portion 2 in the direction along the arrow b after the drilling process is performed, and the surface of the columnar portion 2 is scraped off. Since the stress is applied to the cylindrical portion 2 while being caught by the edge portion 8 of the hole 6, burrs 9a and 9b are generated in the groove-forming region on the edge portion 8 of the hole 6. The burrs 9a and 9b are generated so as to close a part of the hole 6. The reason why the burr 9b is larger than the burr 9a is that the substance scraped when forming the groove 7 escapes in the direction b and tends to become the burr 9b, whereas the burr 9a is generated on the opposite side of the direction b. Is. In this way, the size of the generated burr changes depending on the direction in which the stress is applied.

FIG. 4 is a cross-sectional view of the deburring device according to the first embodiment. The deburring device 10 includes a rotational force generating portion 15, a first rotating body 20, a cutting tool pedestal 30, a concave portion 21 and a convex portion 22, and a second rotating body 40.
The rotational force generation unit 15 generates a rotational force.
The first rotating body 20 can be rotated by the rotational force generated by the rotational force generating unit 15.
The cutting tool pedestal 30 has a cutting tool 31 that can be inserted into the hole 6 and can cut the work 1. The cutting tool pedestal 30 can be rotated by the rotational force of the first rotating body 20 and can be moved along the rotation axis of the first rotating body 20.
The concave portion 21 and the convex portion 22 are provided on the first rotating body 20 and can hold the cutting tool pedestal 30.
The second rotating body 40 is provided so as to be rotatable on the same rotation axis as the first rotating body 20 by the rotational force generated by the rotational force generating unit 15. The second rotating body 40 can rotate together with the first rotating body 20 independently of the rotational force generated by the rotational force generating unit 15.

Further, the deburring device 10 includes a work fixing tool 50, a fixing tool fixing member 60, a pedestal fixing tool 70, a first bearing 80, and a bolt 90. The work fixing tool 50 grips and fixes the rod-shaped portion 3 of the work 1. The fixture fixing member 60 is in contact with the rotating peripheral surface of the work fixture 50 to fix the work fixture 50. The pedestal fixture 70 is in contact with and fixed to the rotating peripheral surface of the cutting tool pedestal 30. The first bearing 80 comes into contact with the rotating peripheral surface of the first rotating body 20 to smooth the rotation of the first rotating body 20. The bolt 90 forms a rotation axis between the first rotating body 20 and the second rotating body 40.

A so-called electric motor is used for the rotational force generation unit 15. As shown in FIG. 4, the rotational force generating unit 15 is connected to the pedestal fixture 70. The electric motor can rotate the pedestal fixture 70 with the rotation axis c, which is the central axis of the bolt 90, which is the central axis of the columnar first rotating body 20, as the center of rotation. The rotation of the pedestal fixative 70 rotates each member.

The first rotating body 20 performs either forward rotation, reverse rotation, or rotation stop depending on the rotational force generated by the rotational force generating unit 15. The first rotating body 20 has a columnar shape. One end surface of the first rotating body 20 has a plurality of concave portions 21 and a plurality of convex portions 22.

The concave portion 21 and the convex portion 22 can hold the cutting tool pedestal 30. Four combinations of the concave portion 21 and the convex portion 22 are formed on the outer peripheral portion of one end surface of the first rotating body 20 at equal intervals in the circumferential direction. The concave portion 21 has a shape in which a part of the outer peripheral portion thereof is cut out. The convex portion 22 is a portion other than a part in which the concave portion 21 is cut out. The convex portion 22 is located from the concave portion 21 via the gently sloping surface 23.

The cutting tool pedestal 30 has eight cylindrical rod-shaped cutting tools 31 that can be inserted into each of the eight holes 6 shown in FIG. The eight cutting tools 31 are provided on the rotation drive unit 32 at equal intervals about the rotation axis of the first rotating body 20. The cutting tool pedestal 30 is formed so as to project toward the first rotating body 20, and four protrusions 33 having rounded tips are provided at equal intervals in the circumferential direction. The surface of the cutting tool pedestal 30 on which the protrusion 33 projects is opposite to the first rotating body 20 side, and the surface other than the surface on which the cutting tool 31 is arranged is designated as the processing tool arrangement surface 34. .. The cutting tool pedestal 30 is pressed against the first rotating body 20 by the spring 35.

The eight cutting tools 31 can be fixed by the work fixing tool 50 by the eight holes 51 so as to be gripped one by one. However, when the cutting tool 31 actually cuts, the fixing is released to enable rotation by the rotation drive unit 32, and a gap is formed in the hole 51 to the extent that the position of the cutting is less likely to shift. Will be done.

The cutting tool pedestal 30 does not rotate according to the first rotating body 20, but rotates together with the second rotating body 40. In the cutting tool pedestal 30, when the first rotating body rotates in the normal direction, that is, in the direction of the arrow d, the recess 21 is in a state of holding the protrusion 33. In this way, when the cutting tool pedestal 30 rotates according to the first rotating body 20, the second rotating body 40 also rotates under the rotational force. That is, the rotational force of the second rotating body 40 is only the rotation of the cutting tool pedestal 30.

The second rotating body 40 does not rotate by directly receiving the rotational force of the rotational force generating portion 15, but if the cutting tool pedestal 30 rotates as described above, it rotates accordingly. The second rotating body 40 has a weight 41 as a "heavy object". The weight 41 gives an inertial force to the rotation of the second rotating body 40. The second rotating body 40 is arranged so as to be in sliding contact with the first bearing fixing portion 76, the first bearing 80, and the peripheral surface and the bottom surface 25 of the first rotating body 20, which will be described later. Bolts 90 are fitted in the bottom surface 25 of the first rotating body 20 and the bottom surface 42 of the second rotating body 40, and the bolt 90 forms a rotation axis c between the first rotating body 20 and the second rotating body 40. ing.

The work fixture 50 is a truncated cone-shaped member whose diameter becomes smaller toward the work 1 side. The outer peripheral surface 52 of the work fixture 50 is pressed by the inner peripheral surface 61 of the fixture fixing member 60.

The fixture fixing member 60 is an opening 62 in which the work 1 side is open. The fixture fixing member 60 has a flat surface portion 63 on the work 1 side excluding the opening 62, a slope portion 64, and an outer peripheral surface portion 65 perpendicular to the flat surface portion 63. The fixture fixing member 60 has a crimped portion 66 having a shape crimped so as to engage with the convex portion 72 at the boundary between the peripheral surface concave portion 71 and the peripheral surface convex portion 72 of the pedestal fixture 70. .. The fixture fixing member 60 has a wide inner peripheral surface portion 67 in contact with the convex portion 72, and a narrow inner peripheral surface portion 68 adjacent to the above-mentioned inner peripheral surface 61.

The pedestal fixture 70 has a flat surface portion 73 formed perpendicular to the outer peripheral surface of the convex portion 72. An opening 74 is provided in the center of the flat surface portion 73. The opening 74 is for passing a plurality of cutting tools 31. The pedestal fixture 70 has a sliding contact portion 75 on the inner wall that is in sliding contact with the outer peripheral surface of the cutting tool pedestal 30.

Extending from the sliding contact portion 75 to the first rotating body 20 and the second rotating body 40 side is the first bearing fixing portion 76 for fixing the first bearing 80 from the outside. The bearing receiver of the first bearing 80 becomes the bearing receiver 81. The bearing receiver 81 has an annular shape and is in sliding contact with the first bearing 80.

The peripheral surface of the first bearing fixing portion 76 has four bolt holes 77 formed at equal intervals and four bolts 78 fitted in each of the bolt holes 77. The bolt 78 enters the bottomed fixing hole 82 formed in the bearing receiver 81 to fix the bearing receiver 81.

FIG. 5 is a flow chart of the operation of the deburring device 10.
First, by rotating the first rotating body 20 in the normal direction (S1), the four protrusions 33 of the cutting tool pedestal 30 are held in the four recesses 21, respectively.

FIG. 6 is a cross-sectional view of the deburring device 10 in a state where the first rotating body 20 is rotated in the normal direction. FIG. 7 is a schematic view showing the positional relationship between the first rotating body 20 and the cutting tool pedestal 30 in a state where the first rotating body 20 is rotated in the normal direction. Each of the protrusions 33 is held in the recess 21. At this time, the work 1 is fixed to the work fixing tool 50 of the work 1 that grips and fixes the rod-shaped portion 3. Further, the eight cutting tools 31 are supported by the work fixing tool 50 to the extent that they do not interfere with their respective rotations.

Next, the groove forming process for forming the groove 7 is performed while continuing the normal rotation while holding the protrusion 33 in the concave portion 21 (S2). In the groove forming process, the tip of a groove forming tool (not shown) whose tip diameter is a protrusion having a groove width dimension is pressed against the upper surface 4 of the cylindrical portion 2 of the work 1. At this time, the work 1 that remains fixed to the work fixture 50 is rotating forward in the direction d. As a result, the groove forming tool scrapes the upper surface 4 of the cylindrical portion 2 of the work 1 to form the groove 7 so as to communicate the plurality of holes 6.

When the groove forming process is completed, the groove forming tool is removed, and the first rotating body 20 of the deburring device 10 is reversed to rotate in the direction opposite to the normal rotation, that is, to rotate in the direction of arrow e in FIG. 8, which will be described later. Let (S3). At this time, the work 1 remains fixed to the work fixture 50 during the groove forming process.

FIG. 8 is a cross-sectional view of the deburring device 10 in a state where the first rotating body 20 is reversed. FIG. 9 is a schematic view showing the positional relationship between the first rotating body 20 and the cutting tool pedestal 30 in a state where the first rotating body 20 is reversed.
When the first rotating body 20 of the deburring device 10 is reversed (S3), the protrusion 33 moves from the recess 21 to the protrusion 22 via the gently inclined surface 23, and the protrusion 33 is held by the recess 21. From the state, the protrusion 33 is held by the protrusion 22. This is because the second rotating body 40 rotates independently of the first rotating body 20 due to the inertial force of the second rotating body 40 and the weight 41, and the concave portion 21 and the convex portion 22 move with respect to the protruding portion 33. be. When the protrusion 33 supports the protrusion 33, the cutting tool pedestal 30 moves to the work 1 side. When the cutting tool pedestal 30 moves to the work 1 side, the cutting tool 31 is inserted into the hole 6 as shown in FIG.

The limit of movement of the cutting tool pedestal 30 to the work 1 side is until the processing tool arrangement surface 34 of the cutting tool pedestal 30 collides with the internal flat surface portion 79 on the opposite side of the flat surface portion 73 of the pedestal fixing tool 70. (See FIG. 8).

When the cutting tool 31 is inserted into the hole 6, the burrs 9a and 9b shown in FIG. 3 generated during the groove forming process are removed. This is because the burrs 9a and 9b are generated so as to close a part of the hole 6, so that the cutting tool 31 hits the burrs 9a and 9b when the cutting tool 31 is inserted into the hole 6.

In the deburring device 10 according to the first embodiment, the second rotating body 40 can rotate in a direction opposite to the rotating direction of the rotational force generated by the rotational force generating unit 15 due to the inertial force of the second rotating body 40 itself. be. At this time, the positional relationship between the first rotating body 20 and the cutting tool pedestal 30 is changed. Specifically, the positional relationship between the first rotating body 20 and the cutting tool pedestal 30 is changed from the state where the protrusion 33 is held by the concave portion 21 to the state where the protrusion 33 is held by the convex portion 22. As a result, the cutting tool 31 is inserted into the hole 6, so that the burrs 9a and 9b can be reliably removed. Therefore, since the deburring device 10 according to the first embodiment can reliably deburr 9a and 9b with one type of cutting tool 31, the time required for the deburring work is longer than that for the manual deburring work. Can be shortened. Further, since the deburring device 10 according to the first embodiment can make the cutting tool 31 have a constant movement, it is possible to prevent the cutting tool 31 from damaging the portion other than the portion where the burrs 9a and 9b are formed. Therefore, the quality of the work 1 can be stabilized.

Further, since the cutting tool 31 capable of removing burrs 9a and 9b can be moved only by the rotation of the second rotating body 40, the deburring work can be automatically performed. As a result, the time required for deburring work can be shortened. Specifically, in the test by the inventors of the present application, the manual deburring work took 294 seconds per work. However, it has been clarified that by using the deburring device 10 according to the first embodiment, the time can be shortened to 24 seconds per work.

In the deburring device 10 according to the first embodiment, the movement of the cutting tool pedestal 30 along the rotation axis c of the first rotating body 20 is performed by the inertial force of the second rotating body 40 itself. That is, it is possible to eliminate the need for another drive source for removing burrs 9a and 9b by the cutting tool 31.

Further, the deburring device 10 according to the first embodiment does not require a drive source for cutting the burrs 9a and 9b by the cutting tool 31, so that the physique can be reduced.

In the deburring device 10 according to the first embodiment, four combinations of the concave portion 21 and the convex portion 22 are formed on the outer peripheral portion of one end surface of the first rotating body 20 at equal intervals in the circumferential direction. As a result, the protrusion 33 is supported by the cutting tool pedestal 30 at four points of three or more points with respect to the first rotating body 20, so that the rotation is stable. Therefore, the cutting tool 31 can be reliably and highly accurately inserted into the desired hole 6.

(Second embodiment)
The deburring device according to the second embodiment has a shape of the second rotating body 40, a shape of the bolt 90, and a second bearing that promotes the rotation of the second rotating body 40, as compared with the deburring device 10 of the first embodiment. It differs in the existence of. FIG. 10 is a cross-sectional view of the deburring device 11 in a state where the first rotating body 20 is rotated in the normal direction according to the second embodiment. FIG. 11 is a cross-sectional view of a deburring device in a state where the first rotating body 20 is reversed according to the second embodiment.

Using the deburring device 11 according to the second embodiment, the mechanism for cutting the burrs 9a and 9b by rotating the first rotating body 20 in the forward or reverse direction as shown in FIG. 5 is the same as that in the first embodiment. The deburring device 11 includes a second bearing 46 as a "rotational support member" in the radial direction of the second rotating body 45.

Further, bolts 95 are fitted into the bottom surface 25 of the first rotating body 20 and the bottom surface 48 of the second rotating body 45 of the deburring device 11 according to the second embodiment, and the bolts 95 are the first rotating body 20 and the first rotating body 20. A rotation axis c with the two rotating bodies 45 is formed.

In the deburring device 11 according to the second embodiment, when the second rotating body 40 rotates in a direction opposite to the rotating direction of the rotational force generated by the rotational force generating unit 15 due to the inertial force of the second rotating body 40 itself. The first rotating body 20 changes the positional relationship with the cutting tool pedestal 30, and the cutting tool 31 is inserted into the hole 6. As a result, the second embodiment has the same effect as the first embodiment.

Further, the second bearing 46 has an effect of maintaining the inertial force of rotation by the weight 47 of the second rotating body 45 for a long time. As a result, the cutting tool 31 can be reliably inserted into the hole 6.

(Other embodiments)
In the above-described embodiment, it is assumed that an electric motor is used for the rotational force generating portion. However, the "rotational force generating portion" is not limited to this. Further, if it generates a rotational force, it may be manually rotated.

In the above-described embodiment, the workpiece to be machined is a part used for injection of a diesel engine. However, the work is not limited to this. If burrs are formed in the holes of the work, it can be a processing target of the deburring device according to the above-described embodiment.

In the above-described embodiment, the second rotating body has a weight as a "heavy object". However, there is no need for "heavy objects". It suffices if the second rotating body can rotate in the direction opposite to the rotating direction of the first rotating body by its own inertial force.

In the above-described embodiment, it is assumed that four combinations of the concave portion and the convex portion are formed. However, the number of combinations of the concave portion and the convex portion does not have to be four. There may be one.

In the above-described embodiment, by reversing the first rotating body, the state in which the protrusion is held in the concave portion is changed to the state in which the protrusion is held in the protrusion and the convex portion. However, by changing the rotation state of the first rotating body, for example, by stopping the rotation of the first rotating body that had been rotating until then, or by changing the rotation speed of the first rotating body, the protrusion becomes a recess. You may change from the held state to the state where the protrusion is held by the convex part.

In the above-described embodiment, by reversing the first rotating body, the protrusion is held in the concave portion and the protrusion is held in the convex portion. However, the state in which the protrusion is held in the convex portion may be changed to the state in which the protrusion is held in the concave portion.

In the above-described embodiment, the rotational force of the second rotating body is only the rotation of the cutting tool pedestal. However, another driving force may be added to the rotational force of the second rotating body.

As described above, the present invention is not limited to such an embodiment, and can be implemented in various embodiments without departing from the gist thereof.

1 ... Work 10, 11 ... Deburring device 20 ... First rotating body 21 ... Concave 22 ... Convex part 30 ... Cutting tool pedestal 31 ... Cutting tool 40 ...・ ・ Second rotating body 41 ・ ・ ・ Weight (heavy object)

Claims (4)

A deburring device capable of removing burrs (9a, 9b) formed so as to project in the inward direction of the hole (8) of the hole (6) of the work (1) to be machined. And,
A rotational force generating unit (15) that generates a rotational force,
The first rotating body (20) that can be rotated by the rotational force generated by the rotational force generating portion, and
It has a cutting tool (31) that can be inserted into the hole and can cut the burr, and can be rotated by the rotational force of the first rotating body on the rotation axis (c) of the first rotating body. A cutting tool pedestal (30) that can be moved along,
A concave portion (21) and a convex portion (22) provided on the first rotating body and capable of holding the cutting tool pedestal, and
A second rotating body (40) that is rotatably provided on the same rotation axis as the first rotating body and can rotate together with the first rotating body independently of the rotational force generated by the rotational force generating portion.
Equipped with
When the second rotating body rotates in a direction opposite to the rotation direction of the rotational force generated by the rotational force generating portion due to the inertial force of the second rotating body itself, the cutting tool pedestal is held in the recess. A burr through which the cutting tool is inserted into the hole by changing the positional relationship between the first rotating body and the cutting tool pedestal so that the cutting tool pedestal is held by the convex portion from the state. Deburring device. The deburring device according to claim 1, wherein the second rotating body has a heavy object (41). The deburring device according to claim 1 or 2, further comprising a rotation support member (46) that rotatably supports the second rotating body with respect to the first rotating body. The deburring device according to any one of claims 1 to 3, which has three or more combinations of the concave portion and the convex portion.

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