JPH04288974A - Method and device for forming three-dimensional stereoscopic model - Google Patents

Abstract

PURPOSE:To form a three-dimensional stereoscopic model with an opaque wire from a graphic displayed on CAD, FAX, etc., thereby creating a sensation full of existing feel and volume. CONSTITUTION:A metal wire alpha is successively drawn out in tracing a nozzle 2 along the contours of the displayed graphic. After setting the wire for a required position for a three-dimensional construction with a holding jig 3, a voltage is applied between the holding jig 3 and the wire formation 6, which is built up from underside, by means of a welding power source 5, and the setting part is continuously built up by a spot welding. Thus, an object of the displayed graphic is formed by repeating this operation.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is aimed at improving the recognition level by embodying figures formed with CAD, or by three-dimensional FAX.
The present invention relates to a method for forming a three-dimensional solid figure that is used for real-image model formation on the output side of a computer, and an apparatus directly used for carrying out the method.

0002

2. Description of the Related Art Apparatuses for producing three-dimensional figures are currently on the market from four companies. The technique used here is to partially irradiate and expose a photocurable resin with laser light or the like to solidify it and form a transparent three-dimensional figure.

0003

[Problems to be Solved by the Invention] Basically, the performance of the resin that can be used in this method is limited, and resins with a very high degree of curing are not actually used. This is a restriction from the mechanism itself, and is due to the fact that relatively high viscosity is not desirable from the viewpoint of fluidity. Therefore, there are considerable restrictions on what can be produced using conventional methods, and it has not been possible to produce products that can actually be used as parts.

[0004] Items made using methods that can only produce transparent objects are extremely limited in terms of functionality and artistry, and are only capable of conveying the feeling of the shape. Depending on the object, an opaque object can often better convey the feel of the actual object to be manufactured. For example, when creating a human figure using a transparent body, it would be appropriate as a medical-related model, but using a transparent body for busts etc. would not make their presence felt, so it would be better to make them using metal materials. It's more tangible. It can also be said that they have become accustomed to this feeling.

[0005] Therefore, instead of using the conventional photocurable resin, there is a method that uses the metal itself. In order to meet this demand, if a method of stacking metal wires in a circle can be used, it may be possible to achieve an actual sense of volume. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method and apparatus for forming a three-dimensional solid figure that is effective and appropriate for solving the above-mentioned conventional problems and meeting the demands.

[0006]

[Means for Solving the Problems] The above-mentioned problems are achieved by the present invention adopting the following novel characteristic construction methods and construction means. That is, the feature of the method of the present invention is that metal wires or plastic wires are sequentially drawn and fed out following the outline of the displayed figure;
After setting this at the required three-dimensional structure position, the set part is laminated as appropriate by spot welding, adhesive, etc., and the wire laminate is stacked from below, and by repeating this operation, the above-mentioned display is displayed. This is a method of forming a three-dimensional solid figure by modeling an object with a drawn figure.

The first feature of the device of the present invention is that there is a nozzle that sequentially depicts and draws out the metal wire while following the outline of the displayed figure, and a nozzle that follows immediately after this nozzle to draw out the metal wire as required. It consists of a holding jig that is set in a three-dimensional stacking position, and a welding power source that applies a voltage between the holding jig and the metal wire laminate that has been stacked from below and spot-welds the set portion. This is a device for forming three-dimensional figures.

The second feature of the device of the present invention is that there is a nozzle that sequentially depicts and feeds out metal wires or plastic wires while following the outline of the displayed figure, and a nozzle that follows and feeds out the metal wire immediately after this nozzle. A three-dimensional solid body consisting of a holding jig that sets wires or plastic wires at a required three-dimensional structure position, and an adhesive spray nozzle that follows the holding jig and sprays instant adhesive onto the set portion. It is a figure forming device.

[0009]

[Operation] The present invention employs the methods and means described above, so that a metal wire is supplied from a thin nozzle, and this metal wire is brought into contact with a metal part that has already been set by a holding jig adjacent to this nozzle. Ru. Next, a welding power source is used to energize between this metal wire part and the part it is in contact with, generating an electric arc at this boundary.
This operation spot-welds the metal wire at the desired position.

[0010] Data generated by CAD or the like is usually expressed in vectors, so a three-dimensional figure can be created by superimposing two-dimensional figures created by tracing these curves or straight lines. In the field of pottery, there is a technique called hand twisting. This technique has been around since ancient times and was also used in the production of Jomon pottery. In this method, the shape is achieved by rolling the clay into a rod shape and tracing it to the shape of the pottery to be made. This method is similar to this hand-twisting method. That is, a desired three-dimensional figure is realized by stacking metal wires while welding them according to the shape.

[0011] If this method is applied to a polymeric plastic wire such as a fishing line, a transparent three-dimensional figure can be produced. Also, if you change the color of this thread, you can create colorful three-dimensional shapes. A drawback of this method is that it is difficult to reproduce shapes that cannot be drawn with a single stroke. However, in such a case, fabrication is essentially possible by forming a double layer by folding back the figure and controlling it so that the resulting thick structure results. For example, when forming a moat, the walls can be folded back at the ends to make the walls twice as thick. Also, it is possible to configure the figure by cutting it at an appropriate position, so
All you have to do is take appropriate action.

0012

Embodiments (Apparatus Example 1) A first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an enlarged perspective view of the main parts of this embodiment, and FIG. 2 is a conceptual configuration diagram of the same in a state of use. In the figure, A is the three-dimensional solid figure forming device of this embodiment, 1 is a supply bobbin for feeding out the wound metal wire α, and 2 is a supply bobbin 1.
It is a funnel-shaped nozzle that inserts the metal wire α fed out from the nozzle and follows the outline of the figure displayed on CAD or the like.

3 follows immediately after the nozzle 2 and the nozzle 2
5 is a conductive semi-circular arc-shaped holding jig for setting the metal wire α drawn out from the arc surface 3a into a desired three-dimensional structure position by engaging it with a guide groove 4 recessed and extending in the entire length of the center of the arc surface 3a; This is a welding power source that applies a voltage via conducting wires 7 and 8 that flow a welding current between the holding jig 3 and the stacked wire laminate 6 from below.

(Method Example 1) A first implementation example of the method of the present invention used in the first apparatus example A will be described with reference to FIG. Nozzle 2
The metal wire α taken out from the tip in the vertical direction is set at a fixed position by a holding jig 3 having a guide groove 4. The figure shows this situation. That is, the three-dimensional wire laminate 6 produced by this construction example
The state of formation is shown. The metal wire α is fed out to a required position and fixed there to realize a desired object shape.

[0015] In this construction example, a spot welding method is adopted as a fixing method. The guide groove 4 of the holding jig 3 reduces the contact resistance by fixing the position and increasing the contact area between the holding jig 3 and the metal wire α, and the resistance at the part to be actually welded becomes relatively large. This also has the function of concentrating power at this location and generating heat locally. Therefore, it is desirable that the radius of curvature of the cross section of the guide groove 4 of this holding jig 3 matches the radius of the metal wire α used. Further, an appropriate value can be selected for the welding interval.

In the case of this construction example, welding was performed at a pitch of approximately 2 mm, and a heart-shaped cylinder with a diameter of 4 cm was fabricated. The material used was a copper wire with a diameter of 0.2 mm, and when this was used for modeling, it was confirmed that it was actually possible to form a three-dimensional wire laminate 6 having the luster of copper.

(Apparatus Example 2) A second apparatus example of the present invention will be explained with reference to the drawings. FIG. 3 is a conceptual configuration diagram of this embodiment in a state of use. In the figure, B is the three-dimensional solid figure forming device of this embodiment, 1 is a supply bobbin from which the wrapped plastic wire β is fed out, and 2 is the plastic wire β fed out from the supply bobbin 1 through which it is inserted and displayed on the CAD, etc. It is a funnel-shaped nozzle that follows the contour of the figure.

3 follows immediately after the nozzle 2, and engages the plastic wire β drawn out from the nozzle 2 with a guide groove 4 recessed and extending in the entire length of the center of the arcuate surface 3a to form a required three-dimensional structure. Semi-circular arc holding jig to set in position, 9
is placed in the vicinity of the holding jig 3, and applies instant adhesive liquid 11 to the interface between the new plastic wire β set by the holding jig 3 and the upper end of the wire laminate 10 that has been stacked from below. This is an adhesive spray nozzle. Although plastic wire β is used in this embodiment, metal wire α can also be used.

(Method Example 2) A second implementation example of the method of the present invention used in the second device example B will be explained with reference to FIG. I tried modeling using nylon plastic wire β instead of copper wire. In this case, the spot welding method cannot be used, so the instant adhesive liquid 11 was sprayed onto the contact area from an adhesive spray nozzle 9 installed near the holding jig 3 to bond it in a predetermined position. The instant adhesive 11 attached to the plastic wire β interface enters the adhesive interface due to surface tension, so it can be bonded effectively.
As a result, a three-dimensional wire laminate 10 having a strong structure can be formed. Using this method, a cylindrical wire laminate 10 could be formed.

(Method Example 3) In forming the three-dimensional wire laminate 10 of the plastic wire β using nylon described in the second construction example, colored nylon is prepared, and a cutter (not shown in the figure) is placed near the holding jig 3. We attempted to cut the product when the desired amount of extension was achieved by attaching a In this method, it is possible to vary the color tone of the plastic wire β used. For example, by preparing seven colored plastic wires β and layering them one after another, a rainbow-colored cylinder could be created.

In short, in the first to third construction examples, C
The metal wire α or plastic wire β is sequentially drawn and fed out from the nozzle 2 following the outline of the figure displayed on the AD etc., held at the required three-dimensional construction position and set by the jig 3, and then moved to the corresponding setting area. The displayed figure is formed by stacking wire laminates 6, 10, etc. from below by spot welding or adhesive using a welding power source 5 and adhesive spray nozzle 9, and repeating this operation. The object will be shaped.

[0022]

[Effects of the Invention] Thus, the present invention is not only about forming transparent objects using conventional photocurable resins, but also about forming objects that are more realistic, and this method expands the range of processing methods and material selection. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view of essential parts showing a first embodiment of the device of the present invention.

FIG. 2 is a conceptual configuration diagram of the same as above in a usage state.

FIG. 3 is a conceptual configuration diagram of a second embodiment of the device of the present invention in use.

[Explanation of symbols]

A, B...Three-dimensional figure forming device α…Metal wire β…Plastic wire 1...Supply bobbin 2...Nozzle 3... Holding jig 3a...Circular surface 4...Guide groove 5...Welding power source 6, 10...Wire laminate 7, 8...Conducting wire 9...Adhesive spray nozzle 11... Instant adhesive

Claims (1)

[Scope of Claims] [Claim 1] A metal wire or a plastic wire is drawn and drawn out in sequence following the outline of the displayed figure, and after setting it at a required three-dimensional structure position, the set area is set as a point. Formation of a three-dimensional solid figure, characterized in that the wire laminate is stacked up from below by welding, adhesive, etc. as appropriate, and the object of the displayed figure is formed by repeating this operation. Method [Claim 2
] A nozzle that sequentially draws and draws out metal wires while following the outline of the displayed figure, and a holding jig that moves immediately after this nozzle to set the fed out metal wires at the required three-dimensional structure position. A three-dimensional solid figure forming apparatus comprising: a welding power source that spot-welds the set portion by applying a voltage between the holding jig and the wire laminate stacked from below; Item 3: A nozzle that sequentially depicts and feeds out metal wires or plastic wires while following the outline of the displayed figure;
Immediately after this nozzle, there is a holding jig that follows and sets the fed out metal wire or plastic wire in the required three-dimensional stacking position, and a holding jig that follows and instantly adheres to the set portion near the holding jig. A three-dimensional figure forming device comprising an adhesive spray nozzle for spraying an adhesive.