JP2021142577A - Deburring device - Google Patents

Abstract

To provide a deburring device which can efficiently deburr an outside face of a cylindrical workpiece with a small configuration.SOLUTION: A hollow cylindrical rotation body 20 receives a workpiece 1 from an air chuck and conveys the workpiece from a receiving position to a machining position. At the machining position, a drive roller 23 comes into contact with a cylindrical surface 2 of the workpiece 1 from the inside of the rotation body 20 and rotates the workpiece 1 with the axis line Ax1 as a rotation central axis by frictional force. An axis line Ax22 of a wheel brush 22 is provided at a higher position than an axis line Ax23 of the drive roller 23 with respect to the axis line Ax1 of the workpiece 1, and the brush 222 rotates at a higher speed than that of the drive roller 23. The brush 222 polishes the cylindrical surface 2 of the workpiece 1 in a state in which the workpiece 1 is pressed from the outside of the rotation body 20 to a contact surface 351 of the drive roller 23. The contact surface 351 of the drive roller 23 is formed on an outer periphery pf a flexible ring 35 having a higher frictional coefficient than that of the brush 222.SELECTED DRAWING: Figure 6

Description

The present invention relates to a deburring device that removes burrs from the outer surface of a cylindrical work.

Conventionally, a technique for removing burrs from the outer surface of a work using a rotatable wheel brush has been known. For example, Patent Document 1 describes a device for transporting an engine cylinder block to a plurality of deburring positions and deburring using different types of wheel brushes at each position. Patent Document 2 describes a device in which two wheel brushes are rotatably provided on a plurality of deburring heads, and the wheel brushes of the heads are swiveled to alternately deburr in an overlapping region.

Japanese Unexamined Patent Publication No. 2000-84659 Japanese Unexamined Patent Publication No. 2010-58241

However, according to the conventional deburring device, the entire device is large, and in addition to the polishing time by the wheel brush, the work is required to be positioned at the machining position, which reduces the efficiency of the deburring work. was there.

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 efficiently deburring with a small configuration.

In order to solve the above problems, the deburring device (10) of the present invention is a hollow cylindrical rotating body that conveys a tubular work (1) from a receiving position (P1) to a processing position (P2) by a circular motion. (20), the drive roller (23) that comes into contact with the outer surface (2) of the work conveyed to the machining position from the inside of the rotating body and rotates the work by frictional force, and the outer surface of the work rotated by the drive roller. A wheel brush (22) having a brush (222) for polishing from the outside of the rotating body is provided.

According to the deburring device of the present invention, the drive roller and the wheel brush can be arranged inside and outside the rotating body, and the entire device can be made compact. Further, since the rotating body conveys the work to the machining position by the circular motion and positions the work at the same time, the operation time dedicated to positioning can be omitted and the efficiency of the deburring work can be improved.

It is an overall view which shows the deburring apparatus of one Embodiment by this invention. It is sectional drawing which follows the line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is an enlarged view of the IV part of FIG. It is an enlarged view of V part of FIG. It is an enlarged view of a processed part. FIG. 6 is a sectional view taken along line VII-VII of FIG. FIG. 2 is a diagram corresponding to FIG. 2 showing another embodiment (1) according to the present invention. FIG. 1 is a view corresponding to FIG. 1 showing another embodiment (2) according to the present invention. FIG. 1 is a view corresponding to FIG. 1 showing another embodiment (3) according to the present invention. FIG. 1 is a view corresponding to FIG. 1 showing another embodiment (4) according to the present invention. It is a reference figure which shows an example of the work to which this invention is applied. It is the schematic which shows the deburring apparatus of the comparative example.

<One Embodiment>
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the deburring device of the present embodiment, the cylindrical surface and the conical surface (hereinafter collectively referred to as the cylindrical surface 2) included in the outer surface of the work 1 (metal needle valve component) after the grinding process illustrated in FIG. 12 are wheel brushes. It is configured to be polished with 22 and deburred. However, the application of the deburring device is not limited to a specific work, and is used for deburring various hollow or solid works having a cylindrical surface on the outer surface of the work, for example, pipes, collars, rings, shafts, etc. Can be used.

As shown in FIGS. 1 and 2, a horizontally long housing 12 is provided on the base 11 of the deburring device 10, and a dust collector 13 is installed on the lower side of the housing 12. The housing 12 includes a lower cover 121 and an upper cover 122, and the upper cover 122 is detachably assembled to the lower cover 121 by a locking member 14. Then, in the assembled state, the processing chamber 15 inside the housing 12 is connected to the dust collector 13 via the communication port 16 of the base portion 111.

A chuck entrance / exit 17 is formed in the upper cover 122, and the work 1 is carried in and out of the processing chamber 15 by an air chuck 18 entering and exiting the chuck entrance / exit 17. Inside the processing chamber 15, there is a rotating body 20 that conveys the work 1 to the receiving position P1 and the processing position P2 by a circular motion, a guide 21 that guides the work 1 around the rotating body 20, and outside the guide 21. A wheel brush 22 for polishing the cylindrical surface 2 of the work 1 and a drive roller 23 for rotating the work 1 inside the rotating body 20 with its own axis Ax1 (see FIG. 12) as a rotation center axis are provided. ..

As shown in FIGS. 2 and 3, the rotating body 20 is formed in a hollow cylindrical shape and is attached to the front end of the index shaft 24 which is also hollow cylindrical. The indexing shaft 24 is connected to the indexing motor 27 via the gear train 25 and the speed reducer 26, and the rotating body 20 rotates the axis line Ax20 (see FIG. 6) parallel to the axis line Ax1 of the work 1 by the indexing motor 27. It is reciprocated as the central axis. A positioning hole 28 for positioning the work 1 is formed in the peripheral wall portion 201 of the rotating body 20, and is divided into a position facing the air chuck 18 and a position facing the wheel brush 22 due to the circular motion of the rotating body 20. It will be issued.

The guide 21 is formed in a hollow cylindrical shape surrounding the rotating body 20, and is fixedly attached to the base 11 by a flange portion 211 at the base end. In the peripheral wall portion 212 of the guide 21, the elongated hole 29 into which the toe portion 181 of the air chuck 18 holding the work 1 enters and the brush entrance 30 into which a part of the wheel brush 22 enters are received at the receiving positions P1. In addition to being formed so as to overlap the positioning hole 28 determined at the machining position P2 (see FIG. 6), work detection sensors 19 (see FIG. 1) are provided on both sides of the elongated hole 29.

4 and 5 show a state in which the positioning hole 28 of the rotating body 20 overlaps the elongated hole 29 of the guide 21 when the rotating body 20 rotates to the receiving position P1. The positioning hole 28 is formed in a rectangular shape having a width substantially equal to the axial length of the work 1 and long in the circumferential direction of the rotating body 20. At the peripheral edge of the positioning hole 28, there are four circumferential positioning portions 281 for positioning the work 1 in the circumferential direction of the rotating body 20, and two axial positioning portions 282 for positioning the work 1 in the axial direction of the rotating body 20. And are formed.

The elongated hole 29 of the guide 21 has substantially the same width as the positioning hole 28 and is formed longer than the positioning hole 28 in the circumferential direction. A pair of opposing inclined surfaces 291 that guide the work 1 to the positioning hole 28 are provided on the peripheral edge of the elongated hole 29. The brush entrance 30 of the guide 21 is formed in a long hole shape having substantially the same size as the long hole 29.

As shown in FIGS. 2 and 6, the wheel brush 22 includes a wheel portion 221 attached to the front end of the polishing shaft 31 and a brush 222 attached to the outer periphery of the wheel portion 221. The rear end of the polishing shaft 31 is connected to the polishing motor 32, and the polishing motor 32 rotates the wheel brush 22 in one direction around the axis Ax22 parallel to the axis Ax1 of the work 1.

The drive roller 23 is formed in a size that can be accommodated inside the rotating body 20, and is attached to the front end of the drive shaft 33. A drive motor 34 is connected to the rear end of the drive shaft 33, and the drive roller 23 uses the axis Ax23 different from the axis Ax20 of the rotating body 20 as the rotation center axis in the direction opposite to the wheel brush 22. It is rotated at a slower speed than.

As shown in FIGS. 6 and 7, a flexible ring 35 made of rubber or the like is mounted around the drive roller 23. A contact surface 351 having a friction coefficient higher than that of the brush 222 is provided on the outer periphery of the flexible ring 35. When the work 1 is conveyed to the machining position, the contact surface 351 comes into contact with the cylindrical surface 2 of the work 1, and the drive roller 23 moves the work 1 in the direction opposite to the wheel brush 22 with a frictional force larger than the frictional force of the brush 222. Rotate to.

The wheel brush 22 is arranged at a position higher than the drive roller 23 (h1 <h2 in FIG. 6) with respect to the work 1. Therefore, in the illustrated example, the arrangement angle θ of the wheel brush 22 and the drive roller 23 with respect to the work 1 is set to about 160 °. Further, the wheel brush 22 is rotated at a higher speed than the drive roller 23, and is configured to polish the cylindrical surface 2 in a state where the brush 222 presses the work 1 against the contact surface 351.

Next, the operation and effect of the deburring device 10 will be described. In the present embodiment, as shown in FIG. 1, the wheel brush 22 and the drive roller 23 are constantly rotated during the operation of the deburring device 10, and the rotating body 20 receives the raw work 1 received from the air chuck 18 at the receiving position. It is conveyed from P1 to the machining position P2, and the machined work 1 is returned from the machining position P2 to the receiving position P1 and delivered to the air chuck 18. At this time, since the rotating body 20 conveys the work 1 to the receiving position P1 and the processing position P2 by a circular motion of about 90 °, the diameter of the rotating body 20 should be reduced and the deburring device 10 should be made compact. Can be done.

At the receiving position P1 and the processing position P2, as shown in FIGS. 5 and 7, the work 1 is positioned inside the positioning hole 28, and a plurality of positioning positions are performed in a state where the cylindrical surface 2 is exposed inside and outside the rotating body 20. It is rotatably supported by the portion 281. Then, the drive roller 23 comes into contact with the cylindrical surface 2 from the inside of the rotating body 20 to rotate the work 1, and the wheel brush 22 polishes the cylindrical surface 2 from the outside of the rotating body 20 to remove burrs. Therefore, the drive roller 23 and the wheel brush 22 can be arranged inside and outside the rotating body 20, and the entire deburring device 10 can be miniaturized.

Further, since the rotating body 20 conveys the work 1 to the machining position P2 and positions it at the same time, the number of actuators can be reduced as compared with the conventional case, and the operation time dedicated to positioning can be omitted to improve the efficiency of deburring work. Can be enhanced. Moreover, since the processed portion of the work 1 is covered with the rotating body 20 and the guide 21, the surrounding environment is protected from dust such as polishing debris by the upper cover 122 of the housing 12 without providing the conventional movable cover. If the upper cover 122 is removed, the brush replacement work can be easily performed.

During the deburring process, the work 1 is supported by the machining position P2 with the cylindrical surface 2 exposed from the positioning hole 28 of the rotating body 20, so that the work 1 is rotated at a fixed position on the rotating body 20 to form a cylinder. The entire circumference of the surface 2 can be uniformly polished with the brush 222. Further, since the wheel brush 22 rotates at a higher speed than the drive roller 23, the cylindrical surface 2 can be accurately polished by the brush 222 with the work 1 pressed against the contact surface 351 of the drive roller 23. ..

On the other hand, since the drive roller 23 rotates around an axis Ax20 different from the axis Ax1 of the rotating body 20, the contact surface 351 of the flexible ring 35 is retracted from the cylindrical surface 2 at the receiving position P1 (see FIG. 5), and the machining position. The work 1 can be accurately rotated by pressing it against the cylindrical surface 2 with P2 (see FIG. 7). Further, since the drive roller 23 has a contact surface 351 having a friction coefficient higher than that of the brush 222, the work 1 can be rotated by a torque based on the difference in frictional force with the brush 222 without idling. Is possible.

<Other Embodiments>
Next, other embodiments of the present invention will be described.
(1) In the embodiment shown in FIG. 8, the bearing member 36 of the polishing shaft 31 is provided on the polishing base 38 via the LM guide 37 so as to be movable back and forth, and the wheel brush 22 is positioned in the axial direction of the work 1 by the cylinder 39. It is configured to be adjustable. According to this configuration, by periodically changing the position of the rotating brush 222, each part of the cylindrical surface 2 in the axial direction can be uniformly polished.

(2) In the embodiment shown in FIG. 9, the take-out position P3 for taking out the work 1 by the carry-out air chuck 40 is set adjacent to the receiving position P1, and the rotating body 20 is set at three positions including the machining position P2. Is configured to transport and position. As described above, according to the present invention, since the work 1 is conveyed by the circular motion of the rotating body 20, the loading / unloading position of the work 1 can be set to an arbitrary phase of the rotating body 20 without enlarging the deburring device 10. It is possible to set.

(3) In the embodiment shown in FIG. 10, the first processing position P2 is set on the right side of the receiving position P1 and the second processing position P4 is set on the left side of the receiving position P1. A first wheel brush 22 and a first drive roller 23 are provided corresponding to the first machining position P2, and a second wheel brush 42 and a second drive roller 43 correspond to the second machining position P4. Is provided. The first drive roller 23 and the second drive roller 43 are connected to a common drive shaft 33 via gear trains 44, 45, 46.

According to this configuration, when a polishing time longer than the cycle time is specified for the deburring process, a large number of deburring devices 10 are removed by polishing the two workpieces 1 at different processing positions P2 and P3. It is possible to finish two workpieces 1 with a predetermined accuracy within a specified cycle time without changing the specifications.

(4) In the embodiment shown in FIG. 11, the communication port 16 of the base portion 111 is connected to the coolant tank 49, and the coolant liquid C is supplied to the processed portion of the work 1 via the pipe 48 by the pump 47. Also in this case, since the processed portion is covered with the rotating body 20 and the guide 21, it is possible to suppress the scattering of the coolant liquid C to the periphery.

In addition, the present invention is not limited to each of the above embodiments. For example, the contact surface of the drive roller is knurled to adjust the frictional force, or the unprocessed work is supplied onto the rotating body by a parts feeder. It is also possible to appropriately change the shape and configuration of each part within a range that does not deviate from the gist of the invention, such as discharging the processed work to the outside of the processing chamber by gravity.

<Comparison example>
FIG. 13 shows a comparative example of the deburring device 10 of each of the above embodiments. In the deburring device 50 of the comparative example, the fixed positioning member 52 and the movable positioning member 53 for positioning the same work 1 (metal needle valve component) as the deburring device 10 are around an axis parallel to the axis of the wheel brush 51. It is rotatably provided. The wheel brush 51, the fixed positioning member 52, and the movable positioning member 53 are rotated by separate motors 54, 55, and 56, respectively. The movable positioning member 53 is driven in the axial direction by the cylinder 57, and holds the work 1 between the movable positioning member 53 and the fixed positioning member 52 at the forward position.

At the time of deburring, the air chuck 58 is lowered to carry the work 1 into the machining position, the fixed positioning member 52 and the movable positioning member 53 hold the work 1, and then the air chuck 58 is raised. Then, the fixed positioning member 52, the movable positioning member 53, and the wheel brush 51 rotate, respectively, and the wheel brush 51 polishes the cylindrical surface 2 of the work 1. After that, the air chuck 58 descends to grip the work 1, the movable positioning member 53 retracts to release the work 1, and the air chuck 58 rises to take out the work 1.

The deburring device 50 of the comparative example has the following problems.
(A) Since the fixed positioning member 52 and the movable positioning member 53 are arranged on the same axis and the wheel brush 51 rotates in a plane orthogonal to the axis, the entire device becomes large.
(B) The air chuck 58 moves up and down twice to deburr one work 1, and the movable positioning member 53 reciprocates once in a different time. Therefore, positioning time is required in addition to polishing time, and deburring is required. Work efficiency is reduced.

(C) For this reason, for example, when a polishing time of 4 seconds is required with a cycle time of 5 seconds, the positioning time is insufficient, so it is necessary to introduce a device with a large number of pieces, but of course, the device is large. And the equipment cost will be high.
(D) Since the periphery of the wheel brush 51 is open, it is necessary to cover the entrance / exit 59 of the air chuck 58 with a movable cover 60 so that polishing debris or coolant does not scatter, which complicates the structure. ..
(E) Since the wheel brush 51 is installed under the machined portion, it takes a lot of time to replace the brush.

1 ... Work, 2 ... Cylindrical surface (outer surface), 10 ... Deburring device,
20 ... rotating body, 22 ... wheel brush, 222 ... brush,
23 ... Drive roller, P1 ... Receiving position, P2 ... Machining position.

Claims (5)

A hollow cylindrical rotating body (20) that conveys the tubular work (1) from the receiving position (P1) to the machining position (P2) by circular motion, and
A drive roller (23) that comes into contact with the outer surface (2) of the work conveyed to the processing position from the inside of the rotating body and rotates the work by frictional force.
A deburring device (10) including a wheel brush (22) having a brush (222) for polishing the outer surface of the work rotated by the drive roller from the outside of the rotating body. The deburring device according to claim 1, wherein the drive roller has a contact surface (351) having a friction coefficient higher than that of the brush. Claim 1 or 2 that the wheel brush rotates at a higher speed than the drive roller with the axis (Ax22) at a position higher than the axis (Ax23) of the drive roller as the rotation center axis with respect to the axis (Ax1) of the work. Deburring device described in. Any one of claims 1 to 3, wherein the rotating body has a positioning hole (28) for rotatably positioning the work in a state where the outer surface of the work is exposed to the inside and the outside of the rotating body. Deburring device described in. The deburring device according to any one of claims 1 to 4, wherein the drive roller rotates inside the rotating body with an axis different from the axis (Ax20) of the rotating body as a rotation center axis.

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