JP3443623B2 - Work reversing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work reversing device for reversing a horizontal posture to a vertical posture for finishing a work such as a cast article and further reversing the vertical posture to a horizontal posture. Regarding

[0002]

2. Description of the Related Art FIG. 4 shows an example of equipment for a work finishing process in which a cast article is partially cut and finished. In the figure, a workpiece 1 of a cast article is a transfer device between equipments and a jig 2 of a pre-stage finishing equipment A.
The work 1 is transferred from a to the jig 2b of the work cutting device B, and the work 1 is cut as described later. The cut work 1 is transferred from the jig 2b to the jig 2c of the post-stage finishing equipment C.

The work 1 of the cast article is, for example, as shown in FIG.
As shown in (B), the work body 1a is a rectangular block body.
And a peripheral projection frame 1b having a rectangular frame shape projectingly provided on the peripheral portion of the upper surface of the work body 1a, and a plurality of central projection groups 1c projecting laterally in a central portion of the upper surface of the work body 1a.
The work 1 is positioned and placed in a horizontal posture on the jig 2b of the work cutting device B, and the peripheral projection frame 1b and the central projection group 1c are cut from the upper surface of the work body 1a. Since such a cutting minimizes the space between the pre-stage finishing equipment A and the post-stage finishing equipment C, the horizontal jig 2b holding the work 1 is attached to the work 1 as shown by the solid line in FIG. At the same time, the work 1 is turned upside down by 90 °, and the work 1 is held in the vertical posture as shown by the chain line in FIG. Figure 7
2 is a front view of the work 1 and the jig 2b in an inverted vertical posture, in which the saw blade 3 that is horizontally driven is lowered from directly above the work 1 to lower the peripheral projection frame 1b and the central projection group 1c from the work body 1a. Disconnect.

A work reversing device for reversing a work 1 from a horizontal posture to a vertical posture supports a part of the lower surface of a horizontal rectangular flat plate-shaped jig 2b with a bearing 4 and applies a rotational force to the jig 2b by an actuator (not shown). The jig 2b is applied to rotate the bearing 4 as a fulcrum in the vertical direction by 90 °. When the cutting of the work piece 1 by the saw blade 3 is completed, the jig 2b moves to the bearing 4
6 is rotated from the vertical position of the chain line in FIG. 6 to the original horizontal position of the solid line in preparation for the next work cutting.

[0005]

The work cutting device B described above.
In the simple work cutting device B in which the saw blade 3 in FIG. 2 is an electric motor, and the feed speed of the saw blade 3 is constant, the cutting resistance when the saw blade 3 directly cuts the work 1 is the capacity of the electric motor. May exceed. For example, FIG. 7 and FIG.
The relationship between the cutting position of the saw blade 3 and the load current of the electric motor will be described below.

When the horizontal saw blade 3 descends to cut the workpiece 1 in the vertical posture, first, the saw blade 3 has a rectangular peripheral projection frame 1b.
The cutting is started by making parallel contact with the entire upper side, and thereafter, the central projection group 1c is sequentially cut from both sides of the peripheral projection frame 1b. The cutting resistance becomes maximum at the cutting position La at which the saw blade 3 cuts the upper side portion of the peripheral projection frame 1b and the cutting position Le at which the lower side portion cuts, and the load current Ia of the electric motor becomes maximum.
The cutting resistance is minimized at the cutting positions Lb and Ld where the saw blade 3 cuts only both sides of the peripheral projection frame 1b, and the load current Ib of the electric motor is minimized. At the cutting position Lc where the saw blade 3 cuts both sides of the peripheral projection frame 1b and the central projection group 1c, the cutting resistance has an intermediate value between the maximum value and the minimum value, and the load current Ic of the electric motor has an intermediate value.

If the cutting resistance when the load current of the electric motor for driving the saw blade 3 becomes maximum exceeds the capacity of the electric motor, the work cutting cannot be continued. The following measures (1)-(3) are mentioned as a solution.

(1) Replace the electric motor with another electric motor having a large output. (2) The feed of the saw blade at the time of cutting the workpiece is decelerated to reduce the cutting resistance. (3) The cutting resistance is reduced by changing the angle of the work with respect to the saw blade so that the portion of the work to be cut by the saw blade is inclined with respect to the saw blade.

However, in the case of the measure (1), an electric motor having a large output may inevitably be increased in size, and interference with peripheral equipment may be a problem. Further, in the case of the countermeasure (2), there may occur a problem that the work cutting time becomes long and the equipment cycle becomes slow.

Further, as a countermeasure (3), specifically, the work 1 is held by the jig 2b in the work reversing device shown in FIG. Jig 2b while being inverted from the horizontal posture to the vertical posture
The work 1 is rotated in a plane parallel to the work 1, and the work 1 is inclined with respect to the saw blade 3. However, in such measures, it is necessary to newly add a rotary work direction changing mechanism to the work cutting device, which is due to space limitation in the equipment and another operation to tilt the work on the jig. Problems such as the addition of various control systems (increased capital investment) will occur.

The present invention has been made in view of the problem of the above measure (3), and is a work reversing device for reversing a work from a horizontal posture to a vertical posture inclined by a predetermined angle without complicating the mechanism. In particular, it is an object of the present invention to provide a work reversing device that can be effectively applied to a work cutting device using a cutting tool.

[0012]

According to the present invention, a jig holding a work carried in on a substantially horizontal jig surface is installed at both end portions in the horizontal X direction , and bearings are installed as fulcrums in the vertical Z direction. A workpiece reversing device for reversing a workpiece from a substantially horizontal posture to a substantially vertical posture by rotating it approximately 90 ° in a direction, in which bearings installed at both ends of the jig have a substantially horizontal jig as a fulcrum. When it is rotated about 90 °, the jig surface rotates to a substantially vertical plane and tilts at a constant angle with respect to the X direction.
It is characterized in that the spherical bearings are arranged offset in the horizontal Y direction and the Z direction which are orthogonal to each other.

The present invention also provides a Z direction perpendicular to the jig.
Characterized in that the annexed an actuator for urging the rotational force in the vertical direction.

Further, according to the present invention, the work held by the jig is processed with a cutting tool which horizontally drives the work in the X direction in a state in which the work is reversed from the horizontal posture to the substantially vertical posture together with the jig. It is characterized by.

Here, the work is a cast article or the like, and the work is positioned and mounted on a horizontal jig, and the jig is rotated approximately 90 ° in the vertical direction with spherical bearings at both ends thereof as fulcrums, and is substantially vertical. When the work piece is reversed to the posture, the work together with the jig is reversed from the horizontal posture to the substantially vertical posture, and at the same time, the workpiece is tilted at a constant angle in the direction parallel to the substantially vertical plane. Therefore, when cutting a vertically oriented work with a cutting tool such as a saw blade that drives horizontally, the work is inclined with respect to the cutting tool and the cutting resistance is reduced, so that the work can be cut with a low-power prime mover. Practical effects such as can be expected.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. The work reversing device shown in the embodiment of the figure is incorporated in the work cutting device B of FIG. 4, and the work 1 which is the cast article of FIG. 5 is changed from the horizontal posture to the vertical posture or the vertical posture opposite thereto. And at the same time, the work 1 is automatically tilted in a predetermined direction when the work is reversed.

FIG. 1 (A) is a plan view when the work 1 is positioned and held in a horizontal posture on a horizontal rectangular flat plate-shaped jig 5, and FIG. 1 (B) is a front view of the jig 5. Yes, Figure 1
FIG. 1C is a left side view of the jig 5 in FIG. Figure 1
The horizontal direction on the left and right of (A) and (B) is defined as the X direction, and FIG.
When the left and right horizontal directions of (C) are taken as the Y direction, in the device of the present invention, a pair of spherical bearings 6, 7 are offset in the Y direction and the vertical Z direction at both ends of the lower surface of the jig 5 in the X direction. Then, the jig 5 is rotated 90 ° between the horizontal position and the vertical position about the rotation centers P and Q of the spherical bearings 6 and 7.

FIGS. 1 (B) and 1 (C) show the outline of the spherical bearings 6 and 7. The device main body 8 and the jig 5 of the work cutting device are shown in FIGS.
Spherical bearings 6 and 7 are installed between the two, and as shown by the chain line in the figure, a rotational force is applied to the jig 5 on the apparatus main body 1
Two actuators 9 are installed. Actuator 9
For the, a simple mechanism that uses an electric motor, a cylinder, or the like as a drive source and is inexpensive can be applied.

Rotation centers P and Q of the pair of spherical bearings 6 and 7
2 is offset by a predetermined distance dy in the Y direction and offset by a predetermined distance dz in the Z direction, which is the height direction, as shown in FIG. 2C. A work 1 of a rectangular block has a rectangular jig 5 with its four sides on a jig 5 held horizontally by a pair of spherical bearings 6 and 7 and an actuator 9.
It is positioned and placed in parallel with the four sides. In this state, when the actuator 9 applies a rotational force to the jig 5 from the Y direction to the Z direction, the jig 5 rotates together with the work 1 from the horizontal posture to the vertical posture shown by the chain line in FIG. Along with this rotation, the jig 5 and the work 1 are tilted by a constant angle in the X direction with respect to the vertical plane as shown by the chain line in FIG. 1 (B).

FIG. 2A shows a jig 5 and a work 1 in a horizontal posture.
2B is a front view of FIG. 2B in which the jig 5 is rotated 90 ° toward the front, and a left side view of FIG.
(C). By rotating the jig 5, a pair of spherical bearings 6,
By rotating 7 around each of the offset centers P and Q arranged offset, the jig 5 is inclined by a constant angle θ with respect to the horizontal X direction in the vertical plane. Further, the spherical bearings 6 and 7 are arranged in an offset manner so that the jig 5 is tilted at a constant angle θ while being inverted by 90 °. Note that the jig 5 cannot rotate if the pair of spherical bearings 6 and 7 arranged offset is a bearing that normally rotates only in one axial direction.

When the jig 5 is inverted from the horizontal posture to the vertical posture, the work 1 integrated with the jig 5 is also inverted from the horizontal posture to the vertical posture, and at the same time, it is inclined at a constant angle θ with respect to the horizontal X direction. Therefore, when the peripheral projection frame 1b and the central projection group 1c are cut from the work main body 1a of the work 1 by the saw blade 3 which is arranged in the horizontal X direction and driven horizontally, the saw blade 3 moves the peripheral projection frame 1b.
Since it contacts the central projection group 1c at an inclination angle θ, it is possible to cut with reduced cutting resistance.

FIG. 3 shows the cutting position of the work 1 by the saw blade 3 divided into three parts. At the first cutting position Lh, the upper side of the peripheral projection frame 1b in which the saw blade 3 is inclined is cut diagonally in order. Further, in the section where the central projection group 1c is cut to the upper end surface, the cutting resistance in this section is small on average, and the load current of the electric motor, which is the prime mover of the saw blade 3, is intermediate as shown by the chain line in FIG. It is suppressed to a value Ic or less. The second cutting position Li in FIG. 3 is a section in which the saw blade 3 cuts the central projection group 1c, and the cutting resistance is maximum in this section, but the load current of the electric motor is up to the intermediate value Ic in FIG. Is. The third cutting position Lj in FIG. 3 is a section from the saw blade 3 cutting the central projection group 1c to cutting the lower side of the peripheral projection frame 1b, and the cutting resistance opposite to that of the first cutting position Lh. The load current of the electric motor fluctuates and gradually decreases from the intermediate value Ic in FIG.

As described above, when cutting the work 1 with the saw blade 3, the work 1 is inclined at a constant angle θ with respect to the saw blade 3, so that the cutting resistance is reduced overall from the start of cutting to the end of cutting. It is possible to cut by the electric power, and there is no need to increase the output of the electric motor. Also, when the jig 5 and the work 1 are turned over integrally,
Since the jig 5 and the work 1 are tilted with respect to the saw blade 3 as they are as one body, it is necessary to attach a work direction changing mechanism for rotating and tilting the work 1 with respect to the jig 5 to the jig 5. It is possible to simplify the jig peripheral mechanism. Further, the single actuator 9 enables the combined angular movement (bidirectional movement) of the jig 5 and the work 1 to be reversed and tilted. As the actuator 9 of this single machine, a simple and inexpensive structure for simply applying a rotational force to the jig 5 can be applied, which simplifies the structure of the work reversing device having a compound angular movement function and reduces the cost. Will be realized.

The present invention is not limited to a cast work or a work reversing device applied to a work cutting device.

[0025]

According to the present invention, the jig and the work are tilted while reversing from the substantially horizontal posture to the substantially vertical posture with the spherical bearing offset arranged on the jig holding the work as a fulcrum. It is possible to simplify the structure, save space, and reduce the cost of a work reversing device that can perform a combined angular motion of reversing and tilting a work.

Further, the work reversing device can be further simplified by rotating the work by applying a rotational force to the jig with a single actuator.

Further, when a workpiece tilted and inverted substantially vertically is cut by a cutting tool such as a saw blade that is horizontally driven,
Practical effects such as cutting work can be performed by reducing the cutting resistance of the work due to the inclination of the work with respect to the cutting tool, and a small output machine can be used as the prime mover of the cutting tool, which reduces the capital investment of the work cutting device. There is.

[Brief description of drawings]

FIG. 1A is a plan view of a jig in a work reversing device showing one embodiment of the present invention, and FIG. 1B is a front view of the jig.
(C) is a left side view of the jig.

2A is a front view of a jig before work reversal of the work reversing device of FIG. 1, FIG. 2B is a front view of the jig after work reversal, and FIG. 2C is a front view of the jig after work reversal. Side view.

FIG. 3 is a front view of the jig shown in FIG.

FIG. 4 is a front view showing an outline of work cutting and finishing equipment.

FIG. 5A is a side view including a partial cross section of the work,
FIG. 3B is a front view including a partial cross section of the work.

FIG. 6 is a side view of a main part of a conventional work reversing device.

FIG. 7 is a front view of a jig when the work is inverted in the work inversion device of FIG.

FIG. 8 is a current graph diagram showing a relationship between a load current of an electric motor for driving a cutting tool and a cutting position when a work is cut by the cutting tool.

[Explanation of symbols]

1 work 3 cutting tools (saw blade) 5 jigs 6 Spherical bearing 7 Spherical bearing 9 Actuator

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Claims (3)

(57) [Claims] 1. A bearing for holding a work loaded on a substantially horizontal jig surface is installed at both ends in the horizontal X direction , and is rotated about 90 ° in the vertical direction in the vertical Z direction using bearings as fulcrums. A workpiece reversing device for reversing a workpiece from a substantially horizontal posture to a substantially vertical posture, wherein bearings installed at both ends of the jig rotate the substantially horizontal jig about this bearing as a fulcrum by about 90 °. A spherical bearing which is arranged offset in a horizontal Y direction orthogonal to the X direction and in the Z direction so that the surface rotates to a substantially vertical plane and tilts at a constant angle with respect to the X direction. A work reversing device characterized in that 2. A work turning apparatus according to claim 1, wherein the annexed an actuator for urging the rotating <br/> rotation force in the vertical direction of the vertical Z-direction to the jig. 3. The work held by the jig is machined with a jig that horizontally drives in the X direction in a state in which the work is reversed from a horizontal posture to a substantially vertical posture together with the jig. The work reversing device according to claim 1.