JPH0639800A - Nozzle device - Google Patents

Abstract

PURPOSE:To perform effective utilization of energy and to cope with a wide range of hole sizes through a single nozzle by rotatably arranging a nozzle in a nozzle housing rockable in two direction and causing the nozzle to perform revolution along the inner peripheral surface of the hole of a work and rotation around an axis. CONSTITUTION:For example, when the hole sizes of works 1A and 1B are D1 and D2 which are different in sizes, a nozzle 17 having an outside diameter D3 insertable in the hole 10 of the small diameter D1 is selected. A nozzle housing 15 and the nozzle 17 are aligned with each other by a centering cylinder 25 to coaxially insert the nozzle 17 in a small hole 1a. The nozzle housing 15 is released from centering and the nozzle housing is inclined through the energizing force of a spring for deviation. As a result, the nozzle 17 is brought into contact with the inner surface of the hole 1a. Under this state, water is injected and cleaning is carried out as the nozzle 17 is revolved and rotated with the aid of a motor 20. A large hole 1b is also cleaned in a similar manner described above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle device for cleaning holes, deburring or the like by spraying high pressure water.

[0002]

2. Description of the Related Art Conventionally, as a nozzle device of this type, as shown in FIG. 4, a deburring blade 2b is provided in a hole 1a of a work 1.
And insert the nozzle 2 for high pressure water.
There is one in which the hole 1a is cleaned and deburred with high-pressure water jetted from the jet port 2a of the nozzle 2 by rotating the shaft around the axis while moving it in the axial direction (JP-A-2-
232200).

In order to carry out cleaning and deburring by effectively utilizing the jetting energy of the high pressure water jetted from the jet port 2a of the nozzle 2, a gap between the jet port 2a of the nozzle 2 and the inner periphery of the hole 1a is formed. Needs to be set to 0.2 to 0.3 mm or less.

[0004]

However, for example, when attempting to clean a plurality of holes having a hole diameter in the range of 6 mm to 40 mm, in order to maintain the above gap (≈0.3 mm), the outer diameters are different. 57 types of nozzles ((40-6)
It is also necessary to prepare /0.6≈57).

Therefore, an object of the present invention is to provide a nozzle device that can effectively use jet energy and can be applied to a plurality of holes having a wide range of hole diameters with one type of nozzle.

[0006]

In order to achieve the above object, the present invention, as illustrated in FIGS. 1, 2 and 3, comprises a support portion 11 which is crossed by a bracket 12 at a substantially intermediate portion in the axial direction. Nozzle housing 1 supported so that it can swing in any direction
5, a nozzle 17 rotatably supported by the nozzle housing 15 and protruding outward from one end of the nozzle housing 15, a motor 20 provided in the nozzle housing 15 for rotating the nozzle 17, It has a rotor housing 23 supported by the support portion 11, and a diametrically elongated hole 27c rotatably supported by the rotor housing 23 and into which the other end portion 15b of the nozzle housing 15 is fitted. The rotor housing 23 is rotated by the motor 20. And a spring 31 provided on the rotor 27 and biasing the other end 15b of the nozzle housing 15 toward one end of the elongated hole 27c.

It is desirable to include a centering member 40 attached to the rotor housing 15 and axially fitted to the other end 15b of the nozzle housing 15 to center the nozzle housing 15.

[0008]

According to the present invention, the nozzle housing 15 which rotatably supports the nozzle 17 is mounted on the support portion 11 by the bracket 1.
It is swingably supported in two directions intersecting with each other. Further, when the rear end portion 15b of the nozzle housing 15 fitted in the elongated hole 27c of the rotor 27 is urged by the spring 31 toward one end of the elongated hole 27 and the rotor 27 is rotated by the motor 20, It rotates with the rotor 27.

Therefore, the tip of the nozzle 17 is the work 1A.
It is revolved around the inner circumference of the hole 1a. At the same time, the nozzle 17 is rotated about its axis by the motor 20, and the high-pressure water ejected from the plurality of nozzles 17a of the nozzle 17 cleans the wall surface of the hole 1a of the work 1A and removes burrs. Since the nozzle 17 is in contact with or located in the vicinity of the inner circumference of the hole 1a of the work 1A by the urging force of the spring 31, the jetting energy of the high pressure water can be utilized to the maximum extent.

As described above, the nozzle 17 has the long hole 27.
c and the spring 31 together with the nozzle housing 15,
The nozzle 17 rotates to draw a conical surface, and the nozzle 17
It follows the inner circumference of the hole 1a. That is, even if the hole diameters D1 and D2 of the work 1A are, for example, in the range of 6 mm to 40 mm, as long as the nozzle 17 has the outer diameter D3 that can be inserted into the hole 1a having the minimum hole diameter D1 (6 mm), the work 1A is always available. , 1B
Since the inner circumferences of the holes 1a and 1b are pressed by the urging force of the spring 31, the nozzle 17 of one type can be applied to a wide range of hole diameters.

Further, the nozzle 17 is connected to the hole 1a of the work 1A.
The centering member 40 provided in the rotor housing 23 when it is inserted into the rear end portion 15 of the nozzle housing 15.
Nozzle housing 15 that can be swung by fitting to b
Can be reliably centered.

[0012]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. As shown in FIG. 2, a base 11 as a support is fixed to the lower surface of an arm 10 of the robot, and a shaft 12 of an inverted U-shaped bracket 12 is attached to the front of the base 11.
a is supported by bearings 13 and 13 so as to be rotatable about a vertical axis.

A substantially intermediate portion in the axial direction of the nozzle housing 15 which is long in the horizontal direction is supported by a pin 16 on the bracket 12 so as to be vertically swingable. Therefore, due to the rotation of the nozzle housing 15 around the vertical axis 12a of the bracket 12 and the vertical swing of the nozzle housing 15 supported by the pin 16 on the bracket 12, the nozzle housing 15 has a conical surface. It becomes possible to move like drawing.

An intermediate shank 18 of a nozzle 17 having a plurality of injection holes 17a is rotatably supported by the nozzle housing 15, and the nozzle 17 is connected to the nozzle housing 15.
Is projected outward from the front end of the.

A gear case 21 supporting a motor 20 is fixed to the outer periphery of the nozzle housing 15, and the intermediate shank 18 and the nozzle 17 are rotated by the motor 20 through gears in the gear case 21. . The motor 20 and the gear case 21 swing together with the nozzle housing 15.

Base stand 11 fixed to the arm 10
The rotor housing 23 is fixed to the rear part.
A centering cylinder 25 is fixed to the rear portion of the rotor housing 23.

As shown in detail in FIG. 1, the rotor housing 23 is formed with a large diameter hole 23a through which a large diameter base portion 15a at the rear end of the nozzle housing 15 penetrates with a diametrical gap. Furthermore, the rotor housing 23
Includes a rear end portion 15b of the nozzle housing 15 having a small diameter.
Is formed with a small-diameter hole 23c that penetrates with a gap in the diametrical direction. A connection port 15c for the high-pressure water pipe 39 is provided on the rear end surface of the rear end portion 15b.

Large diameter hole 23a of the rotor housing 23
A seal member 26a that seals between the outer periphery of the base portion 15a of the nozzle housing 15 and the outer periphery of the rear end portion 15b of the nozzle housing 15 is attached to the small diameter hole 23c. A member 26b is attached.

A rotor 27 having a gear portion 27a formed on the outer periphery is housed in the rotor housing 23, and a base portion 27b of the rotor 27 is rotatably supported by a bearing 28 fitted in a small diameter hole 23c of the rotor housing 23. It is supported.

As shown schematically in FIG. 3, the rotor 27 is formed with a diametrically elongated hole 27c.
The rear end portion 15b of the nozzle housing 15 is movably fitted in 7c.

As shown in FIG. 1, a through hole 27d that penetrates in the radial direction is formed on one side of the long hole 27c of the rotor 27 in the long axis direction. The through hole 27d is formed on the long hole 27c side. A piston 29 is fitted, a spring seat 30 is screwed to the outer peripheral side of the rotor 27 in the through hole 27d, and a coil spring 31 is compressed between the spring seat 30 and the piston 29. The piston 29 contacts the sleeve 48 fitted to the rear end portion 15b of the nozzle housing 15 fitted in the elongated hole 27c by the urging force of the coil spring 31, so that the rear end portion 15b is moved along the elongated hole 27c. One way A
(See FIG. 3).

As shown in FIG. 2, a drive shaft 33 parallel to the nozzle housing 15 projects rearward from the gear case 21, and a rear portion 33 of the drive shaft 33 shown in FIG.
"a" is swingably and rotatably supported by a self-aligning bearing 34 fitted in the hole 23b of the rotor housing 23. A pressing plate 35 that holds a seal member is screwed into the hole 23b on the front side of the bearing 34.

At the rear end of the drive shaft 33 protruding into the rotor housing 23, the gear portion 27a of the rotor 27 is provided.
A gear 36 that meshes with is locked by a key 38 and is fixed by a nut 38. The gear part of the gear 36 is
It is formed in an arcuate shape in the axial direction, and even when the drive shaft 33 swings as the nozzle housing 15 swings,
It smoothly meshes with the gear portion 27a of the rotor 27.

A hollow piston 40 is fitted in the centering cylinder 25 so as to be slidable back and forth, and the cover 4
It is hit by 1 so as not to slip backward. Air supply / discharge ports 25a and 25b are formed on the outer wall of the centering cylinder 25.
When air is supplied and discharged from b, the piston 40 is moved forward, and when the piston 40 has a conical hollow hole 40a fitted into the rear end portion 15b of the nozzle housing 15, the nozzle housing 15 is automatically moved. Is centered in the axial center position. On the contrary, when the piston 40 is moved backward (state of FIG. 1), the centering of the nozzle housing 15 is released and the nozzle housing 15 can freely swing.

The nozzle device having the above structure operates as follows. Now, as shown in FIG. 2, it is assumed that there is a work 1A having a hole diameter D1 of 6 mm and a work 1B having a hole diameter D2 of 40 mm. The nozzle 17 has an outer diameter D3 that can be inserted into the hole 1a having the minimum hole diameter D1 (D3 <D1).

Then, the centering cylinder 25 is used.
The piston 40 is moved forward to fit the hollow hole 40a into the rear end portion 15b of the nozzle housing 15, and the nozzle 17 is centered together with the nozzle housing 15 at the axial center position.

In this state, the arm 10 of the robot is moved to insert the nozzle 17 into the hole 1a of the work 1A having a hole diameter D1 of 6 mm substantially coaxially, and then the piston 40
Is moved backward, the centering of the nozzle housing 15 is released. Therefore, the coil spring 31 causes the rear end portion 15b of the nozzle housing 15 to pass through the piston 28 and the sleeve 48 so that the elongated hole 27 of the rotor 27 is formed.
The nozzle housing 15 is biased in one direction A of c to tilt around the pin 16 and the shaft portion 12a of the bracket 12, and accordingly, the nozzle 17 tilts in the direction opposite to the rear end portion 15b, and the work 1A It contacts the inner circumference of the hole 1a.

After that, the high pressure water pipe 39 to the nozzle 17
When the high-pressure water is supplied to the nozzles, the high-pressure water is ejected from the plurality of nozzles 17 a of the nozzle 17. Then, when the motor 20 is driven, the nozzle 17 is rotated about the axis, and at the same time, the rotor 27 is rotated via the drive shaft 33 and the gear 36, so that the nozzle 27 is guided by the elongated hole 27a of the rotor 27. The rear end portion 15b of 15 rotates so as to draw a conical surface, and the nozzle 17 revolves while revolving along the inner circumference of the hole 1a of the work 1A.

The holes 1a of the work 1A are washed and burrs are removed with high-pressure water ejected from the plurality of nozzles 17a of the nozzle 17 which rotates around the axis. At this time, the nozzle 17
Since the coil spring 31 is biased by the biasing force of the coil spring 31 so as to come into contact with the inner circumference of the hole 1a of the work 1A, at the maximum position of the high-pressure water jet energy from the nozzle 17a facing the wall surface,
Cleaning and the like can be effectively performed.

On the other hand, when the hole 1b of the work 1B having the hole diameter D2 of 40 mm is washed, the nozzle 1 is similarly processed.
When 7 is inserted into the hole 1b and the centering of the nozzle housing 15 is released, the nozzle housing 15 biased by the coil spring 31 is tilted, and the nozzle 17 causes the workpiece 1 to move.
It contacts the inner circumference of the hole 1b of B, and the motor 20 causes the nozzle 1
At the same time as rotating 7 around the axis, the rotor 27 causes the nozzle 17 to follow the inner circumference of the hole 1b of the work 1B and revolve while revolving.

As described above, within the angle θ (see FIG. 2) at which the nozzle housing 15 can swing, the work 1A,
Even if the hole diameters D1 and D2 of 1B are in the range of 6 mm to 40 mm, the nozzle 17 rotates in a scanning manner, and the workpieces 1A and 1B are always rotated.
Since it is pressed against the inner circumferences of the holes 1a and 1b by the urging force of the coil spring 31, it is possible to apply a wide range of hole diameters with only one type of nozzle 17.

Since the nozzle 17 rotates while following the inner periphery of the hole, it can be applied even if the hole of the work is tapered. In addition, the nozzle 17
The injection port 17a may be made to always face the wall surface of the hole by making the revolution cycle and the rotation cycle of the nozzle the same. However, practically, the number of revolutions / number of rotations = 1/10
Twenty.

[0033]

As is apparent from the above description, in the nozzle device according to claim 1 of the present invention, the nozzle housing is supported by the bracket so as to be swingable in two directions intersecting each other, and the end portion of the nozzle housing is supported by the rotor. Nozzle rotatably supported by the nozzle housing is imitated in the hole of the workpiece by rotating the rotor by biasing it toward one end of the slot by a spring. Since it revolves around its axis while revolving, it maximizes the jetting energy of high-pressure water and can be applied to holes of various diameters with a single nozzle.

The nozzle device according to claim 2 of the present invention is
Since the rotor housing is provided with the centering member, the swingable nozzle housing can be surely centered, and the work of inserting the nozzle into the hole of the work can be easily performed.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a high-pressure water nozzle device according to the present invention.

2 is a side view of the high-pressure water nozzle device of FIG.

FIG. 3 is a front view showing the relationship between the long hole of the rotor and the nozzle housing.

FIG. 4 is a side view of a conventional high pressure water nozzle device.

[Explanation of symbols]

10 ... Arm (supporting part), 12 ... Bracket, 15 ... Nozzle housing, 15b ... Rear end part, 17 ... Nozzle, 20
... motor, 23 ... rotor housing, 25 ... centering cylinder, 27 ... rotor, 27c ... elongated hole, 29 ... piston, 31 ... coil spring.

Claims (2)

[Claims] 1. A nozzle housing (15) supported by a support portion (11) by a bracket (12) so as to be swingable in two directions intersecting a substantially intermediate portion in the axial direction, and is rotated by the nozzle housing (15). Supported freely,
A nozzle (17) protruding outward from one end of the nozzle housing (15), a motor (20) provided in the nozzle housing (15) for rotating the nozzle (17), and the support portion (11). ) Supported by a rotor housing (2
3) and rotatably supported by the rotor housing (23),
A rotor (27) having a diametrical elongated hole (27c) into which the other end (15b) of the nozzle housing (15) is fitted, and the rotor (27) rotated by the motor (20), and the rotor (27). And a spring (31) for urging the other end (15b) of the nozzle housing (15) toward one end of the elongated hole (27c). 2. The other end (15) of the nozzle housing (15) attached to the rotor housing (23).
A centering member (40) axially fitted into b) to center the nozzle housing (15).
The nozzle device according to claim 1, further comprising: