JP2001162597A - Heating tool working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating tool working machine capable of speedily forming a three-dimensional outline shape by automatic driving by using a plural number of heating tools by carrying out automatic tool exchange. SOLUTION: This machine has a base 2 provided with a work holding base 3 to place a work on it, a tool holding part 6 free to move in the first axial direction orthogonal with an upper surface of the base 2 and in the orthogonal three axial direction made of the second axial direction and the third axial direction in parallel with the upper surface of the bass 2 and having a tool installing part to install heating tools 81, 82 free to connect and disconnect and a holding part side terminal provided on the tool holding part and free to pass an electric current for heating through the heating tools by making contact with a tool side terminal provided on the heating tool at the time when the heating tool is installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an NC (numerical control).
The present invention relates to a heating tool processing machine which can cut a foam or the like made of a thermoplastic resin or the like by a heating tool whose movement is controlled by an apparatus and can quickly create an arbitrary three-dimensional contour shape. The present invention relates to a heated tool processing machine capable of performing automatic tool change.

[0002]

2. Description of the Related Art As a technique for processing a foam (for example, styrene foam) made of a thermoplastic resin or the like by a heating wire such as a heating wire, a technique described in Japanese Patent Application Laid-Open No. 63-120100 is known. It is. In this method, a foam block is cut into a plurality of plates having a desired thickness, and an interval between a plurality of heating wires is set by an NC device and fixed. With such a conventional heating wire processing machine, it is possible to create a simple shape such as a plate or a rectangular parallelepiped, but cannot process a complicated shape such as an arbitrary three-dimensional contour shape. .

[0003] On the other hand, a prototype of a product model having an arbitrary three-dimensional contour shape is quickly manufactured to examine and evaluate the product shape, confirm product assembly, and check for the presence or absence of component interference. Was needed in product development.
In addition, in the fields of casting molds, apparel, education, medical care, hobbies, and the like, there has been a need for one capable of rapidly forming an arbitrary three-dimensional contour shape. In order to meet such a demand, the present applicant has disclosed in Japanese Patent Application Laid-Open No.
A heated tool processing machine such as that disclosed in Japanese Patent No. 14899 is invented and disclosed.

[0004]

SUMMARY OF THE INVENTION Japanese Patent Application Laid-Open No. H11-1148
With the heating tool processing machine of JP-A-99-99, an arbitrary three-dimensional contour shape can be quickly formed. However, there has been no heating tool processing machine that automatically performs tool change and performs processing using a plurality of heating tools. That is, a heating tool processing machine capable of efficiently forming a three-dimensional contour shape on a workpiece such as a foam by automatic operation has not been realized yet. In addition, it has been required to increase the number of control axes of the first tool support, the second tool support, and the like in JP-A-11-114899 to increase the degree of freedom of machining.

Accordingly, the present invention provides a heating tool machine capable of forming a three-dimensional contour on a workpiece such as a foam by automatic operation by using a plurality of heating tools by performing automatic tool change. The purpose is to provide. Another object of the present invention is to provide a heating tool processing machine in which the number of control axes for moving the heating tool is increased to increase the degree of freedom of processing the workpiece with the heating tool.

[0006]

In order to achieve the above object, a heating tool processing machine according to the present invention comprises: a base provided with a work holding table for mounting a work; hand,
A first axial direction orthogonal to the upper surface of the base, a second axial direction parallel to the upper surface of the base, and a third axis orthogonal to the first axial direction and the second axial direction And a tool holding part having a tool mounting part for detachably mounting the heating tool, the tool holding part being provided in the tool holding part, and the heating tool being mounted. And a holding unit side terminal connected to a tool side terminal provided on the heating tool when the heating tool is connected to the heating tool.

In the above-mentioned heating tool processing machine, the heating tool processing machine is provided so as to face the tool holding section in the third axial direction, and at least a fourth axial direction parallel to the first axial direction. The heating tool includes a wire support that is movable in a fifth axial direction parallel to the second axial direction, and the heating tool has a heating wire stretched between the tool holding unit and the wire support. A first heating tool having a tool-side terminal, wherein the holding unit-side terminal is formed of two terminals, and when the first heating tool is mounted on the tool holding unit, It is preferable that one of the unit-side terminals is arranged so as to be connected to the tool-side terminal of the first heating tool.

In the above-mentioned heating tool processing machine, the heating tool is a second heating tool having an electric heater formed in a predetermined shape held by the tool holding portion and having two tool-side terminals, The holding part side terminal is composed of two terminals, and when the second heating tool is mounted on the tool holding part, the two terminals of the holding part side terminal are connected to the second heating tool. It is preferable that they are arranged so as to be connected to the two tool-side terminals of the tool, respectively.

In the above-mentioned heating tool processing machine, the heating tool processing machine is provided so as to face the tool holding portion in the third axial direction, and at least a fourth axial direction parallel to the first axial direction. The heating tool includes a wire support that is movable in a fifth axial direction parallel to the second axial direction, and the heating tool has a heating wire stretched between the tool holding unit and the wire support. A first heating tool having a tool-side terminal, and a second heating tool having two tool-side terminals in which an electric heating element formed in a predetermined shape is held by the tool holding portion; The unit side terminal is composed of two terminals, and when the first heating tool is mounted on the tool holding unit, one terminal of the holding unit side terminal is the terminal of the first heating tool. A second heating tool connected to the tool-side terminal; It is preferred when it is attached are those which are arranged such that the two terminals of the holding portion side terminals are connected to two of the tool-side terminal of the second heating tools.

[0010] In the above-mentioned heated tool processing machine, the tool holding portion includes suction means for ensuring connection between the holding portion side terminal and the tool side terminal in the vicinity of the holding portion side terminal. It is preferred that it is.

In the above-mentioned heating tool processing machine, it is preferable that the heating tool processing machine further includes a tool magazine provided on the base and capable of storing a plurality of heating tools.

In the above-described heating tool processing machine, the tool magazine may be configured such that a storage section for a plurality of heating tools is provided in the first tool magazine.
It is preferable that they are arranged so as to be arranged in a direction parallel to the axial direction.

[0013] Further, in the above-mentioned heating tool processing machine, a tension applying member provided on the wire supporting portion side of the heating tool to apply a predetermined tension to the heating wire, and a tension applying member of the heating tool on the wire supporting portion side. And a heating wire abnormality detecting means for detecting at least disconnection of the heating wire.

The heating tool processing machine according to the present invention comprises a base provided with a work holding table for mounting a work, and a first base perpendicular to the upper surface of the base with respect to the work. An axial direction, a second axial direction parallel to the upper surface of the base, and the first axial direction.
A tool holder that is relatively movable in at least three axial directions including a third axial direction orthogonal to the axial direction and the second axial direction, and the third axial direction with respect to the tool holder. A fourth axial direction parallel to the first axial direction, a fifth axial direction parallel to the second axial direction,
A wire supporting portion movable in at least three axial directions including a sixth axial direction parallel to the third axial direction; and a heating wire stretched between the tool holding portion and the wire supporting portion. Including a heating tool.

[0015]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a side view of a heating tool processing machine 1 according to the present invention. FIG. 1B is a partially enlarged sectional view showing a portion C in FIG. 1A. FIG. 2 is a rear view of the heating tool processing machine 1 as viewed from the left side of FIG. FIG. 3 is a plan view of the heating tool processing machine 1,
It is what it looked at from the upper side of FIG. The heating tool processing machine 1
The base 2 is provided horizontally, and each constituent member is arranged on the base 2. On the base 2, a work holding table 3 is provided horizontally. An X-axis moving device 21 and a U-axis moving device 24 are provided on the base 2 in parallel with each other in the horizontal direction. The moving axis of the X-axis moving device 21 is set to the X-axis, and the moving axis of the U-axis moving device 24 is set to the U-axis.

The work holding table 3 includes an X-axis moving device 21
It is arranged so as to be located between the shaft moving devices 24.
An indexing table 31 or an indexing table 32 is detachably provided on the workpiece holding table 3. A workpiece can be attached to the table portions of the indexing tables 31 and 32, and the table portions are driven by a drive motor (not shown).
Can be rotated and indexed. When the indexing table 31 is installed, the workpiece can be fixed on the indexing table 31 and supported to be rotatable and indexable about a vertical axis (Y axis) (B axis direction). When the indexing table 32 is installed, the workpiece can be fixed on the indexing table 32 and supported to be rotatable and indexable about a horizontal axis (X axis) (A axis direction). The operator can set the indexing table at the position of the indexing table 31 or the position of the indexing table 32 whichever is appropriate according to the processing shape of the workpiece.

Further, an indexing table is further provided above the indexing table 31, or the indexing table 32 is attached so that the rotation axis is directed in another horizontal axis direction (for example, the Z axis direction). You may make it rotatable around (for example, the C-axis direction). Furthermore, when there is no need to rotate or index the workpiece to perform machining,
The work may be held by a known work holder (for example, see Japanese Patent Application Laid-Open No. H11-114899) provided on the work holding table. It is preferable that the work holding table 3 is configured such that the indexing tables 31, 32 or the work holding tools can be selectively installed depending on the type of the work.

An X-axis moving member 22 is provided on the X-axis moving device 21 so as to be movable in the X-axis direction, and the first column 4 is provided on the X-axis moving member 22. A U-axis moving member 25 is provided on the U-axis moving device 24 so as to be movable in the U-axis direction.
A column 5 is provided. The X axis and the U axis are parallel to each other. The X-axis moving member 22 and the first column 4 are driven to move in the X-axis direction by a driving mechanism such as an X-axis motor 23 or a ball screw mechanism or a slide mechanism (not shown). The U-axis moving member 25 and the second column 5 are moved and driven in the U-axis direction by a driving mechanism such as a U-axis motor 26 and a ball screw mechanism and a slide mechanism (not shown). The first column 4 and the second column 5 can move independently.

The first column 4 has a vertical direction (Y-axis direction).
, A Y-axis moving device 41 is provided.
1 is provided with a Y-axis moving member 42 movable in the Y-axis direction. The Y-axis moving member 42 is moved and driven in the Y-axis direction by a driving mechanism such as a Y-axis motor 43, a ball screw mechanism, and a slide mechanism (not shown). The Y-axis moving member 42
Is fixed to the Z-axis substrate 61, and the Z-axis substrate 61
A Z-axis moving device 62 is provided so as to be movable in a direction facing the column 5 (Z-axis direction). Second of the Z-axis moving device 62
A tool holding portion 6 is fixed to a tip on the column 5 side.
The Z-axis moving device 62 is driven to move in the Z-axis direction with respect to the Z-axis board 61 by a Z-axis motor 63, a Z-axis driving mechanism including a ball screw mechanism and a slide mechanism (not shown). Therefore, the tool holder 6 is movable in three X, Y, and Z axes orthogonal to each other with respect to the workpiece.

The second column 5 has a vertical direction (V-axis direction).
Is provided with a V-axis moving device 51.
1 is provided with a V-axis moving member 52 movably in the V-axis direction. The V-axis moving member 52 is driven by a V-axis motor 53, a driving mechanism such as a ball screw mechanism and a slide mechanism (not shown), and is moved in the V-axis direction. Further, the wire guide mechanism box 76 and the wire support 7 are fixed to the V-axis moving member 52. Therefore, the wire support 7 is movable in two U- and V-axis directions orthogonal to each other with respect to the workpiece. Note that the wire support 7 may be movable in three axes of U, V, and W axes perpendicular to each other with respect to the workpiece. By doing so, the tool holding unit 6 and the wire support unit 7 can each be controlled to move in three axes, and the degree of freedom in machining increases.

A wire heating tool 8 is provided in the tool holder 6 shown in FIG.
1 is attached. One end of a wire portion 814 is fixed to the wire heating tool 81. The other end of the wire part 814 is supported by the wire support part 7, and the wire part 81
4 is constrained in the radial direction and can move in the direction of its central axis. This is because the distance between the tool holder 6 and the wire support 7 changes due to relative movement. The wire portion 814 is hung on the roller 71 in the wire guide mechanism box 76, and its end is connected to the connecting member 7.
It is connected to an electric wire 74 via 41. The electric wire 74
It is wrapped around the rollers 72 and 73, and a weight 75 is attached to an end of the roller 72 via an insulating member 751. The weight 75 is provided to apply a constant tension to the wire portion 814. As shown in FIG.
The weight 75 is loosely restrained by a guide portion formed in the wire guide mechanism box 76 from moving in directions other than the vertical direction.

The wire guide box 76 is provided with proximity switches 77 and 78 for detecting the position of the weight 75. The proximity switch 77 provided below the wire guide mechanism box 76 is for detecting disconnection of the wire section 814. When the wire portion 814 is broken, the weight 75 descends to the lowest point, and the weight 7 located at this lowest point
5 is detected by the proximity switch 77 so that the wire portion 8 is detected.
14 disconnections can be detected.

The proximity switch 78 provided above the wire guide mechanism box 76 is for detecting an abnormal tension of the wire section 814. An abnormality may occur in the tension of the wire portion 814 due to the wire portion 814 getting caught on the structure of the heating tool processing machine 1 or the like. When the wire portion 814 is abnormally tensioned, the wire portion 814 is abnormally extended from the wire support portion 7 and the weight 75 rises to the uppermost point, so that the weight 75 located at the uppermost point is moved to the proximity switch 7.
By detecting at 8, the abnormal tension of the wire portion 814 can be detected.

The wire portion 814 of the wire heating tool 81
It consists of a heating wire such as a nichrome wire (nickel-chromium alloy wire) or an iron-chromium heating wire, and is heated by passing a current. The wire diameter of the wire portion 814 is 0.2 to 0.5 mm.
It is preferable to use a wire having a diameter of 4 mm, but another wire having a different diameter is used depending on the material of the workpiece. The intermediate portion of the heated wire portion 814 supported by the wire heating tool 81 and the wire support portion 7 is given a constant tension by the weight 75 and always keeps a straight state. The workpiece is cut by an intermediate portion of the wire portion 814.

The tool holding part 6 and the wire supporting part 7 are X,
Since the movement can be freely controlled along the Y and Z axes and the U and V axes, not only a plane cut surface but also various curved surfaces can be machined. For example, it is possible to process a quadratic surface such as a conical surface, a spherical surface, an elliptical surface, and a hyperboloid. In the case of a prototype having a shape such as a concave portion that cannot be processed due to interference with the wire portion 814, the prototype is divided into a plurality of appropriate portions, and after processing each portion, they are bonded and the like. Assemble and complete the prototype.

In the vicinity of the edge of the work holder 3,
A column-shaped tool magazine 9 is provided upright in the vertical direction. A plurality of heating tools such as a wire heating tool 81 and a U-shaped heating tool 82 can be stored in the tool magazine 9. Then, the heating tool held in the tool holding unit 6 is automatically removed and stored in the tool magazine 9, or any heating tool among the plurality of heating tools stored in the tool magazine 9 is automatically transferred to the tool holding unit. 6 can be attached. In this way, a plurality of types of heating tools can be automatically exchanged one after another and mounted on the tool holding section 6 to efficiently process a workpiece with an arbitrary shape.

Since the tool holder 6 is movable in the X, Y, and Z axis directions, a tool or the like in which an electric heating element such as a U-shaped heating tool 82 is formed in a predetermined shape is mounted on the tool holder 6. An arbitrary curved surface such as a hole or a concave portion can be processed. In addition, by making the workpiece rotatable in the A, B, and C axis directions, it is possible to perform groove processing on a cylindrical surface.
Further, even in the case of machining with the wire heating tool 81, the position of the tool holder 6 in the Z-axis direction is adjusted according to the thickness of the workpiece in the Z-axis direction, and the tool holder 6 is brought as close to the surface of the workpiece as possible. Then, the processing can be performed. As the tool holding unit 6 approaches the workpiece, the bending and the like of the wire portion 814 of the wire heating tool 81 are reduced, and the processing accuracy is improved. Further, in the case where the wire portion 814 is inclined to perform machining or the like, the closer the tool holder 6 is to the workpiece, the smaller the stroke of the tool holder 6 in the X and Y axis directions.

The heating tool processing machine 1 is controlled by an NC device 10. The NC device 10 includes a power supply circuit for heating the tool of the heating tool processing machine 1, a servo amplifier of each drive motor, and the like. 1 to 3, the NC device 10 is a separate type, but may be provided integrally with the heating tool processing machine 1. The NC device 10 controls the current supplied to the heating tool based on the NC machining program, and
The workpiece is machined by controlling the X, Y, and Z axis movements and the U and V axis movements of the wire support 7. Also, the NC device 10
Control for automatically changing the heating tool is performed based on the NC machining program. Further, the indexing table 31,
32 is installed, the indexing table 31,
The control of the rotation index of the drive motor (B-axis motor or A-axis motor) for 32 is also performed to process the workpiece.

FIGS. 4 and 5 are enlarged views of the tool magazine 9. FIG. 4 is a view of the tool magazine 9 as viewed from the back side of the heated tool processing machine 1, and FIG. 5 is a view of the tool magazine 9 in FIG.
It is the figure seen from the right side of FIG. A plurality of recesses 91 are formed on a side edge of the columnar magazine main body 90 of the tool magazine 9 so as to be arranged in a vertical direction. Further, a tool holding member 92 is fixed corresponding to the position of each recess 91 of the magazine main body 90. The tool holding member 92 is provided with a positioning pin 93 for fixing a position around the center axis of the heating tool. In the vicinity of the tool holding member 92, the tool holding member 9 is provided.
4 is pivotally supported. The tool retaining member 94
The distal end is urged by the spring 95 in the direction of the central axis of the heating tool (in the closing direction).

When the heating tool mounted on the tool holder 6 is moved in the negative X-axis direction as shown in the lower part of FIG. The small diameter portion 821 of the heating tool 82 abuts on the distal end, and the tool retaining member 94 swings so that the distal end is opened against the urging force of the spring 95. When the heating tool 82 is stored in the tool storage position, the tool holding member 94 swings in the closing direction by the urging force of the spring 95, and locks the heating tool 82 in the storage position. For this reason, the small diameter portion 821 of the heating tool 82
Is held by the tool holding member 92 and the tool holding member 94. At this time, the positioning pin 93 is inserted into a positioning hole (not shown) provided in the small diameter portion 821 of the heating tool 82 to fix the position of the heating tool 82 around the central axis.

The state where the heating tool 82 is held by the tool holding member 92 and the tool holding member 94 is also shown in the lower part of FIG. From this state, if the tool holder 6 is moved in the positive Z-axis direction (to the left in FIG. 5), the heating tool 82
Is removed from the tool holder 6 and stored in the tool magazine 9. The heating tool stored in the tool magazine 9 is Z
Although the movement in the axial direction is restricted, it can be released from the storage position by applying a force equal to or more than a predetermined value in the X-axis direction (a force enough to open the tool retaining member 94).

When the heating tool 82 is mounted on the tool holder 6, the tool holder 6 is first positioned at a rearward position (position separated in the positive Z-axis direction) concentric with the heating tool 82, and Is moved in the negative direction of the Z-axis, the heating tool 82 is mounted on the tool holding unit 6 and a state as shown in the lower part of FIG. 5 is obtained.
Next, as shown in FIG. 4, if the tool holding portion 6 is moved in the positive direction of the X axis, the tool holding member 94 swings so that the tip end is opened against the urging force of the spring 95, and the heating tool is heated. Reference numeral 82 is removed from the storage position of the tool magazine 9 and becomes ready for machining.

FIG. 6 shows a wire heating tool 8 attached to the tool holder 6.
FIG. 2 is a cross-sectional view showing a state in which the device 1 is mounted. Although not shown in FIG. 6, the tool holding portion 6 is provided with a holding plunger member 64 and a detent pin 65 as shown in FIGS. The shank 810 of the wire heating tool 81 is formed with an outer peripheral portion 818 to be fitted into the mounting hole of the tool holding portion 6 and a V-shaped groove 812 in a circumferential direction of the outer peripheral portion 818. A ball 64a urged in the distal direction by a spring 64b is provided at the tip of the holding plunger member 64 in the center direction of the tool holding portion 6 (see FIG. 9), and the wire heating tool 81 is attached to the tool holding portion 6. When mounted, the ball 64a at the tip of the holding plunger member 64 projects into the V-shaped groove 812, and holds the wire heating tool 81 with a predetermined force.
In addition, at this time, the tip of the detent pin 65 fits into a key groove (not shown) of the wire heating tool 81, and restricts the rotation of the wire heating tool 81 around the central axis.

Since the wire heating tool 81 is elastically held by the tool holding portion 6 by the holding plunger member 64, the wire heating tool 81 is pulled out of the tool holding portion 6 with a force equal to or greater than the holding force. 81 can be removed from the tool holder 6. Wire heating tool 8
1 is mounted on the tool holder 6, the wire heating tool 8
What is necessary is just to insert the mounting part 1 into the tool holding part 6 with a predetermined force.

On the end face side of the shank 810 of the wire heating tool 81, a tool side terminal 815 for supplying electricity to the wire portion 814 is provided. The vicinity of the end of the wire portion 814 is connected to the shank 81 of the wire heating tool 81 via an insulator.
0, and the end of the wire portion 814 is connected to one end of the conducting wire by a connector. The other end of the conducting wire is connected to the tool side terminal 815. An energizing section 66 is fixed to the rear of the tool holding section 6, and the energizing section 66 is provided with holding section side terminals 67 and 68. Holder side terminal 6
The reference numerals 7 and 68 are provided at positions retracted from the distal end surface of the current supply section 66, so that a short circuit or the like hardly occurs. The holding part side terminals 67 and 68 are urged in the distal direction by elastic force. When the wire heating tool 81 is mounted on the tool holding unit 6, the holding unit side terminal 67 is pressed by the tool side terminal 815,
It moves backward or elastically deforms by a predetermined amount.

The NC unit 1 is connected to the holding unit side terminals 67 and 68.
The power supply cable from 0 is connected. When the wire heating tool 81 is mounted on the tool holding part 6, the holding part side terminal 67 and the tool side terminal 815 are connected, and the power can be supplied to the wire part 814. Another current-carrying terminal for the wire portion 814 is provided on the wire support portion 7 side. For example,
As shown in FIG. 1B, the wire portion 8 is attached to the insulating member 751.
The fourteenth terminal and the conducting wire side terminal are connected together by fixing them together with screws 752. In addition, a permanent magnet 691 and suction plates 692, 692 on both sides thereof are provided at a middle position between the holding portion side terminals 67, 68 on the distal end surface of the conducting portion 66. The suction plates 692 and 692 are made of a ferromagnetic material such as iron, and suction the end face of the shank 810 of the wire heating tool 81 to ensure the connection between the holding section side terminal 67 and the tool side terminal 815.

FIG. 7 shows a U-shaped heating tool 8
FIG. 4 is a cross-sectional view showing a state in which No. 2 is mounted. This cross section is
8 shows a section taken along the line BB in FIG. 8 to show the installation state of the holding plunger member 64 and the rotation preventing pin 65. Like the wire heating tool 81, the U-shaped heating tool 82 is also elastically held by the tool holding portion 6 by the ball at the tip of the holding plunger member 64 protruding into the V-shaped groove 822. At this time, the tip of the detent pin 65 fits into the key groove 823 to restrict the rotation of the U-shaped heating tool 82 around the central axis. The attachment and detachment of the U-shaped heating tool 82 to and from the tool holder 6 is the same as that of the wire heating tool 81.

Tool-side terminals 825 and 826 for supplying electricity to the U-shaped wire portion 824 are provided on the mounting end surface side of the shank 820 of the U-shaped heating tool 82. The U-shaped wire portion 824 is fixed to the main body of the U-shaped heating tool 82 via an insulator, and both ends of the U-shaped wire portion 824 are connected to one ends of two conducting wires by connectors. The other ends of the conducting wires are connected to the tool-side terminals 825 and 826, respectively. When the U-shaped heating tool 82 is mounted on the tool holder 6, the holding part side terminal 67 and the tool side terminal 82
5 is connected and the holding part side terminal 68 and the tool side terminal 826 are connected, so that the U-shaped wire part 824 can be energized.

At this time, the holding portion side terminals 67 and 68 are pressed by the tool side terminals 825 and 826, and are moved backward or elastically deformed by a predetermined amount. That is, the holding unit side terminal 6
7, 68 and the tool-side terminals 825, 826 are connected in a state of being pressed by elastic force. Also in this case, the suction plate 692
692 attracts the end face of the shank 820 of the U-shaped heating tool 82 to hold the holding section side terminals 67, 68 and the tool side terminal 825,
The connection at 826 is ensured.

FIG. 8 shows the U-shaped heating tool 8
FIG. 4 is a cross-sectional view showing a state in which No. 2 is mounted. This cross section is
8 is a cross-sectional view taken along the line AA in FIG. 7. The tool holding part 6 is provided with three holding plunger members 64 at intervals of 120 degrees in the circumferential direction, and elastically holds the U-shaped heating tool 82. In addition, the tip of the detent pin 65 fits into the key groove 823 to restrict the rotation of the U-shaped heating tool 82 around the central axis. In the U-shaped heating tool 82,
Tool-side terminals 825 and 826 are fixed via an insulator.

FIG. 9 is a view showing a tool mounting section of the tool holding section 6. This figure is a view from the same viewpoint as FIG. 8 in a state where the heating tool is removed from the tool holding unit 6. An energizing section 66 is fixed to the bottom surface of the tool mounting opening of the tool holding section 6, and the energizing section 66 is provided with holding section side terminals 67 and 68 and suction plates 692 and 692.

With the above configuration, the tool magazine 9
A plurality of heating tools, such as a wire heating tool 81 and a U-shaped heating tool 82, are stored in the tool holder, and the heating tools are automatically mounted on the tool holder 6, and then automatically replaced with another heating tool. can do. By continuing the machining while automatically changing the heating tool in this manner, a workpiece having a complicated three-dimensional contour can be quickly machined.

When the wire heating tool 81 is housed in the tool magazine 9, the wire heating tool 81 is housed in a position such as the lowermost stage or the uppermost stage of the tool magazine 9 that does not hinder the processing. It is evacuated to a position facing 81 or the like. In addition, as a heating tool in which an electric heating element is formed in a predetermined shape, not only a tool in which a wire is formed in a U-shape, but also a tool in which a wire is formed in various shapes such as a V-shape and a square, and a plate-shaped electric heating element are variously used. Can be used. As the plate-shaped electric heating body, a plate-shaped body of ceramics (ceramic heater) or the like can be used.

Although the shank 810, 820 has been described as a straight shank, it may be a taper shank. Further, although the tool side terminal and the holding unit side terminal are provided inside the shank and the tool holding unit, they may be provided outside the shank on an axis separated by a predetermined distance from the axis of the shank.

FIG. 10 is a diagram showing an example of an NC processing program for performing processing by the heating tool processing machine 1.
The left part of the figure is an NC machining program, and the right part of the figure is an explanation of the NC machining program. The NC machining program is stored in the NC machining program memory inside the NC device 10, and is read and executed for each block (corresponding to one row in FIG. 10). First of NC machining program
“G90” in the block is a command that indicates that the command value is an absolute value. The next "G92X0.Y8
0. "Sets a work coordinate system for machining.

"S3000" in the second block is a command for designating the voltage value of the heating power supply for energizing the heating tool and setting the processing temperature of the heating tool. The third block "M4
8 "is a command to turn on the heating current for the heating tool. The fourth block to the seventh block are parts for performing the processing in the first step. “M49” in the eighth block is a command to turn off the heating current to the heating tool.

"M12" in the tenth block is a command for performing an automatic tool change. In this case, a command is issued to mount a heating tool of tool number 2. Next, the processing temperature of the heating tool is set in “S2500” of the eleventh block,
At block "M48", the heating current for the heating tool is turned on. The thirteenth block to the sixteenth block are portions that perform the processing in the second step. Here, taper processing is performed. “M49” in the seventeenth block is a command to turn off the heating current to the heating tool.

"M11" in the nineteenth block is a command for performing an automatic tool change, in which a command is issued to mount a heating tool of tool number 1. In this way, a plurality of processes can be performed by changing the heating tool one after another. "M30" in the last block is a command for designating the program end. As shown here, the heating current for the heating tool is turned off before performing the tool replacement, and after the tool replacement is performed, a processing temperature corresponding to the heating tool after the replacement is set, and then the heating current is turned on.

Further, if the supply voltage between the holding part side terminals 67 and 68 and the supply voltage between the holding part side terminal 67 and the wire support part 7 can be set independently, the wire heating tool 81 and the U-shaped When the heating tool 82 is replaced and mounted, the optimum voltage can be automatically supplied to each heating tool. In this case, it is not necessary to set the processing temperature according to the heating tool every time the tool is changed.

In the above embodiment, a thermoplastic resin or a foam made of the thermoplastic resin can be used as the workpiece, and a polystyrene resin such as styrene foam is suitable. Further, a workpiece made of a material such as foamed polyethylene, foamed polypropylene, or extruded foamed board can be processed. As described above, a special three-dimensional contour of a prototype can be created at low cost without requiring special characteristics such as photosensitivity as a workpiece.

Further, in the above embodiment, the tool is changed only by moving the tool holding section 6, but another tool changing mechanism such as providing a tool changing arm may be used. Furthermore, although what is called a magnet plug, a connector with magnet, etc. is used as the holding part side terminal and the tool side terminal, a general plug-in connector may be used. In the case of a plug-in connector, the positioning accuracy around the center axis of the heating tool needs to be high enough to enable insertion.

Further, in the above embodiment, the description has been made assuming that the tool holding portion and the wire supporting portion are provided. However, a heated tool processing machine having only the tool holding portion may be used. In this case, it is sufficient that the workpiece holding table on the base and the heating tool mounted on the tool holder are relatively movable in at least three orthogonal axes.
Further, the tool holder may be movable about the Z axis with respect to the main body of the tool holder. In this case, it is necessary to take measures such as not to rotate the tool holding portion by 360 degrees or more, or to incorporate a slip ring so that the electric wire is not twisted even if rotated by 360 degrees or more.

[0053]

Since the present invention is configured as described above, it has the following effects.

Since a terminal for supplying power to the heating tool is provided in the tool holding portion to which the heating tool is detachably mounted, it is possible to perform automatic tool change and use a plurality of heating tools. The three-dimensional contour shape can be processed quickly.

The power supply terminals of the tool holder are provided so as to correspond to both the first heating tool in which the heating wire is stretched linearly and the second heating tool in which the heating element is formed in a predetermined shape.
The first and second heating tools can be used by automatic exchange, and machining of a wider range of shapes can be performed by automatic operation.

Since the magnetic poles are provided in the vicinity of the holding part side terminal of the tool holding part, the connection between the holding part side terminal and the tool side terminal can be reliably performed.

Since a tool magazine capable of accommodating a plurality of heating tools is provided on the base, tool change can be performed in a short time only by moving the tool holding portion.

Since the storage portions of the heating tools in the tool magazine are arranged in the vertical direction (Y-axis direction), the structure of the tool magazine can be simplified, and the cost of the heating tool processing machine can be reduced. Can be.

Since an abnormality such as disconnection of the heating wire can be detected, it is possible to improve the reliability at the time of automatic operation of machining by the heating tool.

[Brief description of the drawings]

FIG. 1 is a side view of a heating tool processing machine according to the present invention.

FIG. 2 is a rear view of the heating tool processing machine.

FIG. 3 is a plan view of the heating tool processing machine.

FIG. 4 is an enlarged view of a tool magazine.

FIG. 5 is an enlarged view of a tool magazine.

FIG. 6 is a cross-sectional view showing a state where a wire heating tool is mounted on a tool holding unit.

FIG. 7 is a cross-sectional view showing a state where a U-shaped heating tool is mounted on the tool holding unit.

FIG. 8 is a cross-sectional view showing a state where a U-shaped heating tool is mounted on the tool holding unit.

FIG. 9 is a diagram illustrating a tool mounting unit of a tool holding unit;

FIG. 10 is a diagram illustrating an example of an NC machining program;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Heated tool processing machine 2 ... Base 3 ... Work holding table 4 ... 1st column 5 ... 2nd column 6 ... Tool holding part 7 ... Wire support part 9 ... Tool magazine 10 ... NC apparatus 21 ... X-axis moving apparatus 22 X-axis moving member 23 X-axis motor 24 U-axis moving device 25 U-axis moving member 26 U-axis motor 31, 32 Indexing table 41 Y-axis moving device 42 Y-axis moving member 43 Y Axis motor 51 V-axis moving device 52 V-axis moving member 53 V-axis motor 61 Z-axis substrate 62 Z-axis moving device 63 Z-axis motor 64 holding plunger member 65 detent pin 66 ... energizing section 67 , 68 ... Holder side terminal 691 ... Permanent magnet 692 ... Attraction plate 71, 72, 73 ... Roller 74 ... Electric wire 75 ... Weight 76 ... Wire guide mechanism box 77, 78 ... Proximity switch 81 ... Wire heating tool 82 ... U-shaped Shaped heating tool 90 ... Magazine body 91 ... Recessed part 92 ... Tool holding member 93 ... Positioning pin 94 ... Tool retaining member 95 ... Spring 810,820 ... Shank 812,822 ... V-shaped groove 814 ... Wire part 815,825,826 ... tool side terminal 818 ... outer peripheral part 821 ... small diameter part 823 ... keyway 824 ... U-shaped wire part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Akinori Imae 12th floor of Matsudo Building, 1307-1 Matsudo, Matsudo-shi, Chiba F-term in Softwing Co., Ltd. (reference) 3C060 AA05 CA10 CF04

Claims (9)

[Claims] 1. A base (2) provided with a work holding table (3) for mounting a work, and a first orthogonal to an upper surface of the base (2) with respect to the work. Axis direction (Y), a second axis direction (X) parallel to the upper surface of the base (2), and the first axis direction (Y) and the second axis direction (X). Third axial direction (Z)
And a tool holding part (6) having a tool mounting part that is relatively movable in at least three axial directions and has a heating tool (81, 82) removably mounted thereon, and the tool holding part (6). The heating tool (8
(82) when the heating tool (81,8) is attached.
A heating tool processing machine having a holding part side terminal (67, 68) connected to the tool side terminal provided in 2) and capable of supplying a heating current to the heating tool (81, 82). 2. The heating tool processing machine according to claim 1, wherein the third axial direction (Z) is provided with respect to the tool holding portion (6).
And at least a fifth axial direction (U) parallel to the first axial direction (Y) and a fourth axial direction (V) parallel to the second axial direction (X). The heating tool has a heating wire (814) stretched between the tool holding portion (6) and the wire support portion (7). A first heating tool (81) having a terminal (815)
The holding part side terminals (67, 68) are composed of two terminals, and when the first heating tool (81) is mounted on the tool holding part (6), One of the holding part side terminals (67, 68) is connected to the first heating tool (8).
1) A heated tool processing machine arranged so as to be connected to the tool side terminal (815). 3. The heating tool processing machine according to claim 1, wherein the heating tool has an electric heating element (82) formed in a predetermined shape.
4) a second heating tool (82) held by the tool holding portion (6) and having two tool-side terminals (825, 826).
The holding section side terminals (67, 68) are composed of two terminals, and when the second heating tool (82) is mounted on the tool holding section (6), Two terminals of the holding part side terminals (67, 68) are connected to the second heating tool (8).
2) A heated tool processing machine arranged so as to be connected to each of the two tool-side terminals (825, 826). 4. The heating tool processing machine according to claim 1, wherein the third axial direction (Z) is provided with respect to the tool holding portion (6).
And at least a fifth axial direction (U) parallel to the first axial direction (Y) and a fourth axial direction (V) parallel to the second axial direction (X). The heating tool has a heating wire (814) stretched between the tool holding portion (6) and the wire support portion (7). A first heating tool (81) having a terminal (815)
And an electric heating element (824) formed in a predetermined shape is held by the tool holding portion (6), and the two tool-side terminals (825,
826) and a second heating tool (82), wherein the holding part side terminals (67, 68) are composed of two terminals, and the tool holding part (6) is provided with the second heating tool (82). When one heating tool (81) is mounted, one terminal of the holding part side terminals (67, 68) is connected to the first heating tool (8).
1) When the second heating tool (82) is attached to the tool holder (6), the second terminal (67, 68) is connected to the tool side terminal (815). A heating tool processing machine, wherein two terminals are arranged so as to connect to the two tool-side terminals (825, 826) of the second heating tool (82), respectively. 5. The heating tool processing machine according to claim 1, wherein the tool holding section (6) is provided with the holding section side terminals (67, 6).
8) Heating means provided with suction means (691, 692) near the holding section side terminals (67, 68) and the tool side terminals (815, 825, 826) in the vicinity of 8). Tool processing machine. 6. A heating tool processing machine according to claim 1, wherein said heating tool processing machine is provided on said base and includes a plurality of heating tools.
82) A heated tool processing machine having a tool magazine (9) capable of storing therein. 7. A heating tool processing machine according to claim 6, wherein said tool magazine (9) comprises a plurality of heating tools (81, 8).
2) A heating tool processing machine wherein the storage sections are arranged so as to be arranged in a direction parallel to the first axial direction (Y). 8. The heating tool processing machine according to claim 2, wherein the heating tool is provided on a side of the wire support section (7) of the heating tool.
A tension applying member (75) for applying a predetermined tension to the heating wire (814), and a tension applying member (75) provided on the wire support section (7) side of the heating tool;
A heating tool processing machine having at least a heating wire abnormality detecting means (77, 78) for detecting disconnection of the heating wire (814). 9. A base (2) provided with a work holding table (3) for mounting a work, and a first orthogonal to the upper surface of the base (2) with respect to the work. Axis direction (Y), a second axis direction (X) parallel to the upper surface of the base (2), and the first axis direction (Y) and the second axis direction (X). Third axial direction (Z)
A tool holder (6) relatively movable in at least three axial directions including: a third axial direction (Z) with respect to the tool holder (6).
A fourth axial direction (V) parallel to the first axial direction (Y) and a fifth axial direction (U) parallel to the second axial direction (X). A wire support part (7) movable in at least three axial directions including a sixth axial direction parallel to the third axial direction (Z); the tool holding part (6); and the wire support part ( 7) a heating tool (81) including a heating wire (814) stretched between
And a heating tool processing machine having the same.