JP5930694B2 - Sphere manufacturing apparatus and manufacturing method thereof - Google Patents

Description

  The present invention relates to a sphere manufacturing apparatus and method for manufacturing a sphere of any size from a material such as a resin easily and at low cost.

  In addition to the use of spheres in various science and engineering or industrial fields, conductive spheres having conductivity are also used for radar calibration and radio wave scattering experiments, for example. However, it is not easy to cut out a sphere including such a conductor sphere from a lump of a metal material such as copper or brass with a lathe or the like, and a great processing cost is required. In addition, when the metal conductor spheres are cut and formed in this way, there is a disadvantage that the weight increases, so it is conceivable to reduce the weight, but to make a hollow sphere to reduce the weight Further, the processing cost is further increased due to an increase in processing steps.

On the other hand, if a resin sphere is subjected to surface treatment to make the surface conductive, it can be used for radar calibration, radio wave scattering experiments, and the like. However, resin spheres have been conventionally manufactured by using a mold to inject a resin material into the mold, or filling a foamed resin material into the mold. For this reason, the diameter of the sphere is determined by the diameter of the recess provided in the mold, and it is difficult to easily manufacture a sphere having an arbitrary diameter. In addition, when a sphere is manufactured by injection molding, burrs generated due to a slight gap at the joint between the mold and the mold remain on the outer peripheral surface of the sphere, and an appropriate sphere can be obtained. It had a disadvantage that could not be done.
On the other hand, as a technique for forming a polystyrene foam material into a spherical surface, a technique disclosed in Patent Document 1 below has been conventionally known.

JP 7-314400 A

However, although this patent document 1 discloses a technique for forming a polystyrene foam in a hemispherical shape, no technique for forming a resin material or the like into a sphere has been disclosed.
The present invention has been made in view of the above background, and an object of the present invention is to provide a sphere manufacturing apparatus and a manufacturing method capable of manufacturing a sphere of any size from a material such as a resin easily and at low cost.

The invention according to claim 1, which has solved the above-mentioned problem, includes a first rotating jig for rotating the workpiece around the main rotation axis by fixing the workpiece.
It is arranged to face the first rotating jig, has a receiving part centered on the main rotation axis, and fixes the end of the work piece to this receiving part, and rotates the work around the main rotation axis. A second rotating jig;
An arm material supported so as to be rotatable around a sub-rotation axis that intersects and is orthogonal to the main rotation axis;
One end of the work piece is hemispherically attached to the arm material parallel to the sub-rotating shaft at a position away from the sub-rotating shaft, and pivoted around the sub-rotating shaft while being fixed by the first rotating jig. And machining one surface of the workpiece to a hemispherical surface with the workpiece removed from the first rotating jig, and fixing the other end of the workpiece to the receiving portion of the second rotating jig. A processing tool for processing the end into a hemispherical surface ;
Is a manufacturing apparatus of a sphere including.

  According to the spherical body manufacturing apparatus of the first aspect, the workpiece fixed to the first rotating jig is rotated around the main rotation axis. Along with this, by rotating the arm material around the sub rotation axis orthogonal to the main rotation axis, the processing tool attached to the arm material at a position away from the sub rotation shaft is turned around the sub rotation axis. . Thus, one end portion of the workpiece is processed, and this end portion becomes a hemispherical surface.

  In the state where the end portion of the work piece that is a hemispherical surface is fixed to the second rotation jig arranged to face the first rotation jig, and the work piece is rotated around the main rotation axis, By rotating the arm member around the auxiliary rotation axis, the processing tool is turned around the auxiliary rotation axis. Thus, the other end portion of the workpiece is processed, and the other end portion is a hemispherical surface.

As described above, according to the spherical body manufacturing apparatus according to the present invention, first, one end of the workpiece fixed to the first rotating jig is formed into a hemispherical shape by the processing tool. Thereafter, the end of the workpiece formed in a hemispherical shape is fixed to the second rotating jig, and the other end of the workpiece is formed again in a hemispherical shape by the processing tool.
As a result, the workpiece becomes a sphere as a whole without using a mold, and the sphere can be cut out of the workpiece easily and at low cost without using a mold. At this time, it is possible to easily cut out a sphere of any size by attaching the arm material while arbitrarily setting the distance of the processing tool from the auxiliary rotating shaft.

The invention of claim 2 is the sphere manufacturing apparatus according to claim 1, wherein the processing tool is a heating wire.
For example, by sticking a heating wire heated by the power supply device to the arm member in parallel with the main rotation axis, the workpiece such as polystyrene foam or synthetic resin is melted and easily processed.

The invention of claim 3 is the sphere manufacturing apparatus according to claim 1, wherein the processing tool is a laser processing machine.
By irradiating the workpiece with laser light from the laser processing machine attached to the arm material, the workpiece is easily processed.

The invention according to claim 4 is the sphere manufacturing apparatus according to claim 1, wherein the processing tool is a water jet device.
By injecting a water stream from a water jet device attached to the arm material onto the workpiece, the workpiece is easily processed.

The invention according to claim 5, which has solved the above-mentioned problem, is a work positioned away from the main rotation axis while rotating the work around the main rotation axis in a state where the work piece is fixed to the first rotating jig. First, the tool is turned about a sub-rotation axis orthogonal to the main rotation axis, and the end of the workpiece opposite to the end fixed to the first rotating jig is processed into a hemispherical surface by the processing tool. Process,
A second step of fixing the hemispherical surface processed in the first step to the second rotating jig so as to be rotatable around the main rotation axis;
While rotating the workpiece around the main rotation axis by the second rotating jig, the processing tool is turned around the sub rotation axis, and the end of the workpiece processed into a hemispherical surface in the first step A third step of processing the end of the workpiece on the opposite side into a hemispherical surface by this processing tool;
It is a manufacturing method of the sphere containing.

According to the method for manufacturing a sphere according to claim 5, similarly to the sphere manufacturing apparatus according to claim 1, first, one end of the workpiece fixed to the first rotating jig is formed into a hemisphere. Thereafter, the end portion of the workpiece formed in a hemispherical shape is fixed to the second rotating jig, and the other end portion of the workpiece is formed in a hemispherical shape.
Thus, as in the first aspect, the workpiece becomes a sphere as a whole without using a mold, and the sphere can be cut out of the workpiece easily and at low cost without using a mold. At this time, similarly to the first aspect, it is possible to easily cut out a sphere of any size by attaching the arm member while arbitrarily setting the distance of the processing tool from the auxiliary rotating shaft.

  According to the present invention, an excellent effect is provided that a sphere manufacturing apparatus and a manufacturing method capable of easily and inexpensively manufacturing a sphere of any size from a material such as a resin are provided.

1 is a front view of a lathe to which a sphere manufacturing apparatus according to an embodiment of the present invention is applied. It is a perspective view of the processing support stand used for the ball manufacturing apparatus concerning a 1st embodiment of the present invention. It is a front view of the processing support stand used for the manufacturing apparatus of the sphere concerning a 1st embodiment of the present invention. It is a top view of the processing support stand used for the manufacturing apparatus of the sphere concerning a 1st embodiment of the present invention. It is a side view of the processing support stand used for the manufacturing apparatus of the sphere concerning a 1st embodiment of the present invention. It is sectional drawing of the 2nd rotation jig used for the manufacturing apparatus of the sphere which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the 1st process of the manufacturing method of the sphere which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the 2nd process of the manufacturing method of the sphere which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the 3rd process of the manufacturing method of the sphere which concerns on the 1st Embodiment of this invention, Comprising: It is a figure showing the middle of a process. It is explanatory drawing which shows the 3rd process of the manufacturing method of the sphere which concerns on the 1st Embodiment of this invention, Comprising: It is a figure showing the completion | finish of a process. It is sectional drawing of the 2nd rotation jig used for the manufacturing apparatus of the sphere which concerns on the 2nd Embodiment of this invention.

A sphere manufacturing apparatus and a manufacturing method thereof according to a first embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the spherical body manufacturing apparatus 10 according to the present embodiment can be used by being installed, for example, on a lathe 1 in a machine tool. By making the chuck of the lathe 1 the first rotating jig 12 that grips and rotates the workpiece around the main rotation axis X that is the main axis of the lathe 1, for example, it is made of polystyrene foam or synthetic resin. A cylindrical workpiece W (shown in FIG. 7) is fixed to the first rotating jig 12.

  In this lathe 1, a headstock 3 to which a chuck can be attached is located at one end of a bed 2, and a carriage 4 on which a lateral feed base and a tool rest (not shown) are placed is movable in the middle of the bed 2. In addition, the tailstock 5 is positioned near the other end on the bed 2. Further, on the carriage 4 of the lathe 1, a processing support base 14 for processing the workpiece W is positioned as shown in FIGS. Specifically, the substrate 16 of the processing support 14 is installed on the carriage 4, and a pair of upright plates 18 extend upward from the substrate 16 with the bed 2 interposed therebetween.

  As shown in FIGS. 1 to 5, the base end side of the arm member 22 is rotatably supported on the upright plates 18 via the support shafts 20, and the distal end side of the arm member 22 is connected to the connecting plate 24. Are connected to each other. Therefore, while the arm member 22 is rotatably supported, the pair of arm members 22 and the connecting plate 24 are configured to rotate integrally, but the axis connecting the pair of support shafts 20 is the main rotation. Since the rotation axis Y is orthogonal to the axis X, the arm member 22 rotates around the rotation axis Y.

  Each arm member 22 is provided with a plurality of attachment holes 22A from the portion of the support shaft 20 along the longitudinal direction thereof. However, each attachment hole 22A is formed at the same position of the pair of arm members 22, and is a processing tool between the attachment holes 22A at any one of these attachment holes 22A. By installing the heating wire 26, the heating wire 26 is stretched between the pair of arm members 22 in parallel with the auxiliary rotation axis Y.

  As a result, the heating wire 26 is attached to the arm member 22 at a position away from the sub rotation axis Y, and the heating wire 26 is turned around the sub rotation axis Y. At this time, the position of the heating wire 26 can be arbitrarily changed by appropriately selecting the attachment hole 22A. Further, the heating wire 26 is connected to the power supply device 28 shown in FIG. 2, and the heating wire 26 can be heated by energization from the power supply device 28.

  As described above, the lathe 1 is operated to rotate the first rotating jig 12 serving as a chuck to rotate the workpiece W at least once around the main rotation axis X, while the heated heating wire 26 is moved to the main rotation axis X. Is rotated 180 degrees around the sub-rotation axis Y orthogonal to each other, one end W1 of the workpiece W shown in FIG. 7 is melted by the heating wire 26 and can be formed into a hemispherical shape.

  On the other hand, on the other end side of the bed 2, a second rotating jig 32 that is attached to the tailstock 5 and can be manually rotated is disposed to face the first rotating jig 12. As shown in FIG. 6, the second rotating jig 32 includes a face plate 34 that is a receiving portion for fixing the workpiece W. The second rotating jig 32 is formed in a disk shape having a diameter larger than the diameter of the workpiece W, and the surface of the face plate 34 facing the first rotating jig 12 is processed into a hemispherical surface. It is a hemispherical concave surface having the same diameter as one end W1 of W and having the main rotation axis X as the center.

  A plurality of suction holes 36 extending along the main rotation axis X are formed inside the face plate 34, and are connected to each other at the end portions of the suction holes 36, and on the main rotation axis X which is the center. The structure is such that the air is exhausted from the face plate 34 through the positioned discharge pipe 32A. An air hose 40 connected to the vacuum pump 42 is connected to the exhaust pipe via a rotary coupler 38. For this reason, since the rotary coupler 38 is interposed, even if the second rotating jig 32 and the face plate 34 rotate, vacuum suction can be performed without any problem.

  Therefore, by rotating the second rotating jig 32 manually, for example, by sucking air from the plurality of suction holes 36, one end W1 of the workpiece W that is hemispherical is a hemispherical recess. By being able to be attracted to the face plate 34, the one end W1 is fixed on the main rotation axis X, and the workpiece W rotates around the main rotation axis X.

  Accordingly, the workpiece W supported by the second rotating jig 32 is rotated at least once around the main rotation axis X, and the heated heating wire 26 is rotated around the sub-rotation axis Y around the workpiece W. The other end W2 of the workpiece W supported by the first rotating jig 12 is melted by the heating wire 26 by turning 180 degrees, contrary to when one end W1 is processed. It becomes possible to form a hemisphere.

Next, the operation of the sphere manufacturing apparatus 10 according to the present embodiment and the procedure of the manufacturing method will be described below.
According to the method of manufacturing a sphere using the manufacturing apparatus 10 according to the present embodiment, as a first step, a cylindrical workpiece W fixed to the first rotating jig 12 as shown in FIG. It rotates around the rotation axis X. Accordingly, by rotating the arm member 22 around the sub-rotation axis Y orthogonal to the main rotation axis X, the heating wire 26 attached to the arm member 22 at a position away from the sub-rotation axis Y is sub-rotated. It is turned around the axis Y. Thus, one end W1 of the workpiece W which is opposite to the end fixed to the first rotating jig 12 is processed by the heating wire 26, and this end is made a hemispherical surface. .

  Next, as a second step, the workpiece W is removed from the first rotating jig 12, and the first rotating jig 32 disposed opposite to the first rotating jig 12 as shown in FIG. One end W1 of the workpiece W processed in the process to be a hemispherical surface is fixed to be rotatable about the main rotation axis X. At this time, one of the workpieces W that is sucked by the plurality of suction holes 36 of the face plate 34 connected to the vacuum pump 42 through the air hose 40, the rotary coupler 38, and the discharge pipe 32A shown in FIG. The end W <b> 1 is securely fixed to the second rotating jig 32.

  Thereafter, as a third step, the arm member 22 is rotated around the sub-rotation axis Y while the workpiece W is rotated around the main rotation axis X by the second rotation jig 32 as shown in FIG. As a result, the heating wire 26 is turned around the auxiliary rotation axis Y. Thus, the other end W2 of the workpiece W opposite to the one end W1 of the workpiece W processed into the hemispherical surface in the first step is processed by the heating wire 26, and the other end W1 is processed. The end portion W2 is similarly hemispherical as shown in FIG.

As described above, according to the spherical body manufacturing apparatus 10 according to the present embodiment, one end W1 of the workpiece W fixed to the first rotating jig 12 is formed in a hemispherical shape by the heating wire 26. Thereafter, the end portion of the workpiece W formed in a hemispherical shape is fixed to the second rotating jig 32, and the other end portion W2 of the workpiece W is again formed in a hemispherical shape by the heating wire 26. .
From this, the workpiece W becomes a sphere as a whole without using a mold, so that the sphere can be cut out of the workpiece W easily and at low cost without using a mold. At this time, by attaching the arm member 22 while arbitrarily setting the distance of the heating wire 26 from the auxiliary rotation axis Y, it becomes possible to easily cut out a sphere of any size.

Next, a second embodiment of the spherical body manufacturing apparatus and the manufacturing method thereof according to the present invention will be described below with reference to the drawings. In addition, the same structure part as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the overlapping description.
Although the present embodiment has substantially the same structure as the first embodiment, as shown in FIG. 11, in this embodiment, the face plate on the side in contact with the workpiece W of the second rotating jig 32. Instead of the concave surface 34 being a hemispherical concave surface, at least three or more fixing devices 50 having a triangular hypotenuse are arranged in this portion so as to be rotationally symmetric.

  At this time, the fixing devices 50 that are triangular and wedge-shaped are arranged so that the fixing devices 50 that are radiating from the center of the face plate 34 are rotationally symmetrical around the main rotation axis X at equal intervals. As a result, the hypotenuse of each fixing device 50 comes into contact with the hemispheric surface forming one end W1 of the workpiece W. As shown in FIG. 11, the fixing device 50 has a through hole 50 </ b> A that is linear and has the skewer 52 facing the center of the hemisphere so that a needle-like skewer 52 protrudes from the slope. Is formed.

  Accordingly, three or more skewers 52 are driven into the hemispherical surface of one end W1 of the workpiece W through the through-hole 50A, and the one end W1 of the workpiece W is second-rotated. The structure fixed to the tool 32 and this embodiment are the same. For this reason, also in the present embodiment, one end W1 of the workpiece W can be fixed without any problem.

  In the above embodiment, vacuum suction or sticking by skewer material is adopted as the means for fixing the work piece to the face plate of the second rotating jig. However, the present invention is not limited to these means. Adhesion with an adhesive tape may be used. Furthermore, it is conceivable that the diameter of the hemispherical concave surface formed on the face plate of the second rotating jig, the size of the triangular fixture, and the like are appropriately changed as necessary. Moreover, although the lathe chuck is the first rotating jig, the lathe is not necessarily used, and other machine tools or other means other than the machine tool may be used.

  On the other hand, in the said embodiment, although the to-be-processed object was made into the cylindrical foam polystyrene and synthetic resin, a shape and material are not limited to these. Furthermore, in the said embodiment, although the processing tool was a heating wire, when using a processing tool as a laser beam, it outputs from the laser processing machine in the position where the heating wire 26 of the processing tool of FIG. 2 is arrange | positioned. When the laser beam is passed and the processing tool is a water jet beam, the water jet beam output from the water jet device may be passed through the position where the heating wire 26 of the processing tool shown in FIG. In addition, any processing device suitable for processing a workpiece may be used.

  The embodiment according to the present invention has been described above, but the present invention is not limited to the embodiment, and various modifications can be made without departing from the spirit of the present invention.

  The present invention can be applied to processing of a sphere used in various science and engineering or industrial fields.

DESCRIPTION OF SYMBOLS 10 Sphere manufacturing apparatus 12 1st rotation jig 14 Processing support base 22 Arm material 26 Heating wire (processing tool)
32 Second rotating jig 34 Face plate (receiving part)
X Main rotation axis Y Sub rotation axis W Workpiece

Claims (5)

A first rotating jig to which the workpiece is fixed and which rotates the workpiece around the main rotation axis;
It is arranged to face the first rotating jig, has a receiving part centered on the main rotation axis, and fixes the end of the work piece to this receiving part, and rotates the work around the main rotation axis. A second rotating jig;
An arm material supported so as to be rotatable around a sub-rotation axis that intersects and is orthogonal to the main rotation axis;
One end of the work piece is hemispherically attached to the arm material parallel to the sub-rotating shaft at a position away from the sub-rotating shaft, and pivoted around the sub-rotating shaft while being fixed by the first rotating jig. And machining one surface of the workpiece to a hemispherical surface with the workpiece removed from the first rotating jig, and fixing the other end of the workpiece to the receiving portion of the second rotating jig. A processing tool for processing the end into a hemispherical surface ;
Manufacturing equipment for spheres including   2. The sphere manufacturing apparatus according to claim 1, wherein the processing tool is a heating wire.   The sphere manufacturing apparatus according to claim 1, wherein the processing tool is a laser beam output from a laser processing machine.   The sphere manufacturing apparatus according to claim 1, wherein the processing tool is a water jet beam output from a water jet apparatus. While the work piece is fixed to the first rotating jig, the work tool positioned away from the main rotation axis is rotated around the sub rotation axis orthogonal to the main rotation axis while rotating the work object around the main rotation axis. A first step of turning and processing the end of the workpiece opposite to the end fixed to the first rotating jig into a hemispherical surface by this processing tool;
A second step of fixing the hemispherical surface processed in the first step to the second rotating jig so as to be rotatable around the main rotation axis;
While rotating the workpiece around the main rotation axis by the second rotating jig, the processing tool is turned around the sub rotation axis, and the end of the workpiece processed into a hemispherical surface in the first step A third step of processing the end of the workpiece on the opposite side into a hemispherical surface by this processing tool;
A method of manufacturing a sphere including

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