JPH04266446A - Device for assembling lost foam pattern - Google Patents

Abstract

PURPOSE:To automatically assemble the lost foam pattern of tree like by joining an unit pattern of plural pieces corresponding to the branch or the leaf to the sprue corresponding to the trunk. CONSTITUTION:The sprue longitudinal direction moving means 11 and/or the sprue circumferential direction moving means 41 which move the sprue 2 to the longitudinal direction and/or the circumferential direction of the sprue 2 at the joining position of the unit pattern 4, the unit pattern moving means 21 which moves the unit pattern 4 to the joining position and aproaches and presses it to the sprue 2, and the heating body moving means 31 which heats the sprue 2 and the unit pattern 4 locally and moves the heated body to be molten to the joining position are provided, these are the device for assembling the lost foam pattern.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to the assembly of a fugitive model that is used for assembling a tree-like fugitive model by welding a plurality of unit models corresponding to branches or leaves to a sprue corresponding to a trunk. It is related to the device.

0002

BACKGROUND OF THE INVENTION Hitherto, the lost wax method has been widely adopted as one of the precision casting methods.

This lost wax method involves welding a large number of unit models made using an injection machine or the like using brazing material onto a sprue to form a tree-like fugitive model, which is then subjected to slurry adhesion, stuccoing (sanding), and drying. This process is repeated several times to form a multi-layered refractory coating, which is then heated to dewax and then fired to create a ceramic shell mold with increased mold strength. Molten metal is poured into this mold and solidified. This is a precision casting method in which a tree-shaped cast body is obtained by demolding and sand removal, and then cut into individual cast parts.

In such a lost wax method, as mentioned above, it is necessary to assemble a tree-like disappearing model by welding a plurality of unit models corresponding to branches or leaves to a sprue corresponding to a trunk. In the past, this was done manually by an operator using a heated trowel.

[0005] In addition, in order to improve the work efficiency caused by such manual work, a unit in which a plurality of wax models are integrally molded around a metal cylindrical assembly unit on a single cylindrical porous runner rod has been developed. A method of assembling a fugitive model by sequentially fitting the models and adhering them to each other has also been proposed (for example, Japanese Patent Publication No. 63-9901).

[0006]

[Problems to be Solved by the Invention] However, in the above-mentioned assembly method, each unit model is constructed by gluing the wax models together by letting the wax flow out from holes provided in the metal cylindrical assembly unit. Since these unit models were fitted into a cylindrical perforated runner rod, it was difficult to position the metal cylindrical assembly unit, wax to flow out of the hole provided in the metal cylindrical assembly unit, and hot water in the unit model. There are problems in that it requires many processes such as fitting it into the road rod, and it also requires the use of non-disappearing materials such as metal cylindrical assembly units. Moreover, the number of wax models varies depending on the production volume. This method has the problem that it is difficult to arbitrarily set the assembly density, and there is no need to use cylindrical assembly units made of non-disappearing materials or fit them into runner rods. The challenge was to develop a method and device for assembling a vanishing model.

[0007]

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems.The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide a fugitive model assembly device that is capable of automatically welding and assembling a plurality of unit models corresponding to leaves.

[0008]

[Means for Solving the Problems] A fugitive model assembly device according to the present invention assembles a tree-like fugitive model by welding a plurality of unit models corresponding to branches or leaves to a sprue corresponding to a trunk. The apparatus includes a sprue lengthwise moving means and/or a sprue circumferentially moving means for moving the sprue in the length direction and/or circumferential direction of the sprue at a welding position of the unit model, and A unit model moving means for moving the unit model to a welding position to approach or press the sprue, and a heating body moving means for moving a heating body that locally heats and melts the sprue and the unit model to the welding position. In an embodiment, an image recognition unit that recognizes the position of the unit model, the sprue longitudinal movement means and/or the sprue circumferential movement means, the unit model movement means, and the heating body movement An image recognition control means having a sprue length direction moving means control section and/or a sprue circumferential direction moving means control section, a unit model moving means control section and a heating body moving means control section, each of which transmits necessary control commands to the means. In the same embodiment, the sprue longitudinal moving means is a single-axis robot;
The means for moving the sprue in the circumferential direction is a stepping motor,
The unit model moving means is a horizontal articulated robot, and the heating body moving means is a simultaneous three-axis robot. It is used as a means to solve problems.

[0009]

In a state where the sprue is moved and positioned at the welding position of the unit model by the sprue length direction moving means, the unit model is moved to the welding position with the sprue by the unit model moving means and is brought close to or close to the sprue. The crimped state is reached, and the heating body is moved by the heating body moving means to the adjacent part or the crimped part between the sprue and the unit model to locally heat and melt the sprue and the unit model in the adjacent part or the crimped part. By pressing the sprue and the unit model, the unit model is welded to a predetermined position on the sprue after solidification.

Next, the sprue is moved by a predetermined distance in the length direction by the sprue length direction moving means, and another unit model is moved by the unit model moving means to a welding position with the sprue, and is brought close to or close to the sprue. The crimped state is reached, and the heating body is moved by the heating body moving means to the adjacent part or the crimped part between the sprue and the unit model to locally heat and melt the sprue and the unit model in the adjacent part or the crimped part, and By crimping the sprue and the unit model, the unit model is welded to a predetermined position on the sprue after solidification.

Next, the sprue is moved by a predetermined distance in the length direction by the sprue length direction moving means, and the unit models are welded in the same manner as described above, thereby forming a plurality of unit models in the length direction of the sprue. weld.

When welding a plurality of unit models in the circumferential direction of the sprue, the sprue is moved by a predetermined distance in the circumferential direction by the sprue circumferential direction moving means, and in this state, the length of the sprue is adjusted in the same manner as described above. Weld multiple unit models in the horizontal direction.

In this way, a predetermined number of unit models are welded and fixed in the length direction of the sprue, and if necessary, a predetermined number of unit models are also welded in the circumferential direction of the sprue to assemble a fugitive model. , the position of the unit model is recognized by the image recognition unit of the image recognition control means, and corresponding to the position of the unit model converted into information by the recognition or in response to other information, the sprue of the image recognition control means is also recognized. The longitudinal movement control section, the unit model movement means control section, the heating body movement means control section, and the sprue circumferential direction movement means control section control the sprue length direction movement means, unit model movement means, heating body movement means, and sprue, respectively. By transmitting the necessary control commands to the circumferential movement means, the longitudinal movement of the sprue, the movement of the unit model, the movement of the heating body, and the movement of the sprue in the circumferential direction are made more accurate and reliable. .

[0014] As a result, a plurality of unit models corresponding to branches or leaves can be automatically welded to a sprue corresponding to a trunk, and no human effort is required to assemble the fugitive model. Further, since a metal assembly unit is not required, there is no need for such a metal assembly unit, which is a non-disappearing member, to constitute a part of the vanishable model.

Furthermore, in the above description, a case is shown in which a plurality of unit models are welded in the length direction of the sprue and then the sprue is rotated by a predetermined amount in the circumferential direction. It goes without saying that the sprue may be moved by a predetermined amount in the length direction after individual welding.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall structure of a fugitive model assembling apparatus according to the present invention. A tree-like disappearing model 5 as shown in FIG. 2 is created by welding a plurality of unit models 4 corresponding to arranged branches or leaves.
It is used to assemble.

As shown in FIG. 1, this fugitive model assembly apparatus 1 includes a sprue length direction moving means for moving the sprue 2 in the length direction of the sprue 2 at the welding position of the unit model 4. A uniaxial robot 11, a horizontal articulated robot 21 as a unit model moving means for moving the unit model 4 to the welding position and approaching or crimping the sprue 2, and the sprue 2 and the unit model in the proximity or crimping state. A simultaneous three-axis robot 31 serves as a heating body moving means for moving a heating body that locally heats and melts the sprue 2 to the welding position of the unit model 4 in the circumferential direction of the sprue 2. A stepping motor 41 serves as a means for moving the sprue in the circumferential direction.
, an image recognition unit 51a that recognizes the position of the unit model 4 placed on the pallet 3, and a means for moving each sprue in the length direction (uniaxial robot) 1 corresponding to the position of the unit model 4, etc.
1, a unit model moving means (horizontal articulated robot) 21, a heating body moving means (simultaneous three-axis robot) 31, and a sprue circumferential moving means (stepping motor) 41 for transmitting necessary control commands, respectively. Means control section 51b, unit model moving means control section 51c, heating body moving means control section 51d, and sprue circumferential direction moving means control section 51e
The configuration includes an image recognition control means (image recognition control device) 51 having the following functions.

Among these, the uniaxial robot 11 as a sprue length direction moving means for moving the sprue 2 in the length direction of the sprue 2 at the welding position of the unit model 4 is used as a sprue length direction moving means, as shown in FIG. It has a gripping part 12, and the sprue 2 held by the gripping part 12 can be moved in the longitudinal direction thereof by arrow A.
It moves only in the axial direction (Y-axis direction) indicated by 1.

Further, as shown in FIG. 4, the horizontal articulated robot 21, which serves as a unit model moving means for moving the unit model 3 to the welding position to approach or press the sprue 2, holds the grip portion 22 of the unit model 4. has pallet 3
The image recognition control means 5 determines the position of the unit model 4 placed above.
The unit model 4 can be recognized by the image recognition unit 50a of 0, moved to the welding position, and brought close to or crimped onto the sprue 2. It moves in the axis rotation direction indicated by A3 (J2 axis rotation direction), the axis rotation direction indicated by arrow A4 (W axis rotation direction), and the axis direction indicated by arrow A5 (Z axis movement direction).

Further, a simultaneous three-axis robot 31 as a heating moving means for moving a heating body to a welding position for locally heating and melting the sprue 2 and the unit model 4 which are in a pressed or crimped state is shown in FIG. 5, it has a soldering iron holding part 33 that holds the heating iron 32 shown in FIG. arrow A so that it can be moved between
It moves simultaneously in the axial direction (X-axis direction) indicated by 6, the axial direction (Y-axis direction) indicated by arrow A7, and the axial direction (Z-axis direction) indicated by arrow A8.

[0021] Further, the heating body moving means may be equipped with a hot air blower for removing molten wax remaining on the part of the iron 32 which is the heating body.

Furthermore, the image recognition control means 51 specifically includes a visual controller, a camera, a video monitor,
It consists of a keyboard terminal, etc.

When assembling the fugitive model 5 as shown in FIG. 2 using the fugitive model assembling apparatus 1 having such a configuration, the sprue 2 is moved by the uniaxial robot 11 serving as the means for moving the sprue in the longitudinal direction. is moved and positioned at the welding position of the unit model 4, the unit model 4 is moved to the welding position with the sprue 2 by the horizontal articulated robot 21 serving as the unit model moving means, and is brought close to or crimped onto the sprue 2. state, the iron 32 which is a heating body is moved by the simultaneous three-axis robot 31 which is a heating body moving means to the adjacent part or the crimped part between the sprue 2 and the unit model 4, and the sprue 2 is moved to the adjacent part or the crimped part between the sprue 2 and the unit model 4. By locally heating and melting the unit model 4 and press-bonding the sprue 2 and the unit model 4, the unit model 4 is welded to a predetermined position of the sprue 2 after solidification.

Next, the sprue 2 is moved by a predetermined distance in the length direction by the uniaxial robot 11 which is the sprue lengthwise moving means, and another unit model 4 is moved onto the pallet by the horizontal articulated robot 21 which is the unit model moving means. 3, it is moved to the welding position with the sprue 2 and is in a state where it is close to or press-bonded with the sprue 2, and the iron 32, which is the heating element, is moved to the welding position with the sprue 2 and the unit model 4 by the simultaneous three-axis robot 31, which is the heating element moving means. The sprue 2 and the unit model 4 in the adjacent part or the crimped part are locally heated and melted, and the sprue 2 and the unit model 4 are crimped, so that after solidification, It is welded to a predetermined position on the sprue 2.

Next, the sprue 2 is moved by a predetermined distance in the length direction by the uniaxial robot 11 serving as the sprue length direction moving means, and the unit model 4 is welded in the same manner as described above, thereby changing the length of the sprue 2. A plurality of unit models 4 are welded in the horizontal direction.

When a plurality of unit models 4 are to be welded also in the circumferential direction of the sprue 2, the sprue 2 is moved by a predetermined distance in the circumferential direction by a stepping motor 41, which is a means for moving the sprue in the circumferential direction. Then, a plurality of unit models 4 are welded in the length direction of the sprue 2 in the same manner as described above.

In this way, a predetermined number of unit models 4 are welded and fixed in the length direction of the sprue 2, and if necessary, a predetermined number of unit models 4 are also welded in the circumferential direction of the sprue 2 to form a fugitive model 5. During this time, the position of the unit model 4 is recognized by the image recognition section 51a of the image recognition control means 51, and the position of the unit model 4 converted into information by the recognition is recognized, or corresponding to other information. Similarly, the sprue length direction moving means control section 51 of the image recognition control means 51
b. The unit model moving means control section 51c, the heating body moving means control section 51d, and the sprue circumferential direction moving means control section 51e control the uniaxial robot 11, which is the sprue longitudinal direction moving means, and the horizontal multi-axis robot, which is the unit model moving means, respectively. Jointed robot 2
1. Transmit necessary control commands to the simultaneous three-axis robot 31, which is a heating body moving means, and the stepping motor 41, which is a sprue circumferential direction moving means, to move the sprue 2 in the longitudinal direction, move the unit model 4, The movement of the iron 32, which is a heating element, and the movement of the sprue in the circumferential direction are made more accurate and reliable.

As a result, a plurality of unit models 4 corresponding to branches or leaves are automatically welded to the sprue 2 corresponding to a trunk, and no human effort is required to assemble the fugitive model 5. Become. Furthermore, since a metal assembly unit is not required, there is no need for such a metal assembly unit, which is a non-disappearing member, to constitute a part of the erasable model.

Note that in the above embodiment, the sprue 2
In this example, after welding a plurality of unit models 4 in the length direction of the sprue, the sprue 2 is rotated by a predetermined amount in the circumferential direction. 2 may be moved by a predetermined amount in the length direction.

[0030] In addition, although the above embodiment shows the case where three types of robots are used, other devices or mechanisms having the same functions as these or an automatic mechanism that can be numerically controlled may also be used. This is self-evident.

[0031]

Effects of the Invention According to the fugitive model assembly apparatus of the present invention, branches or leaves can be attached to a sprue corresponding to a trunk without incorporating a non-fugitive member such as a metal unit member into the fugitive model. It is possible to automatically weld and assemble a plurality of corresponding unit models, and a significant effect is brought about in that the workability when assembling a tree-shaped evanescent model is significantly improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the overall configuration of a fugitive model assembly apparatus according to the present invention.

FIG. 2 is an explanatory diagram illustrating the structure of a vanishing model.

FIG. 3 is an explanatory diagram of a slope of a uniaxial robot that is a means for moving the sprue in the longitudinal direction.

FIG. 4 is an explanatory diagram of a slope of a horizontal articulated robot that is unit model moving means.

FIG. 5 is an explanatory diagram of a slope of a simultaneous three-axis robot that is a heating body moving means.

FIG. 6 is an explanatory side view of a iron that is a heating element.

[Explanation of symbols]

1 Disappearance model assembly device 2 Sprue 3 Palette 4 Unit model 5 Vanishing model

Claims (3)

[Claims] 1. An apparatus for assembling a tree-like evanescent model by welding a plurality of unit models corresponding to branches or leaves to a sprue corresponding to a trunk, the sprue being attached to the welding position of the unit model. A sprue length direction moving means and/or a sprue circumferential direction moving means for moving the sprue in the length direction and/or the circumferential direction, and a unit model movement for moving the unit model to the welding position and approaching or crimping the sprue. 1. A fugitive model assembling apparatus, comprising: means for moving a heating element that locally heats and melts the sprue and unit model to the welding position. 2. Transmitting necessary control commands to an image recognition unit that recognizes the position of the unit model, a sprue length direction moving means and/or a sprue circumferential direction moving means, a unit model moving means, and a heating body moving means. 2. The vanishing property according to claim 1, further comprising an image recognition control means having a sprue longitudinal direction moving means control section and/or a sprue circumferential direction moving means control section, a unit model moving means control section, and a heating body moving means control section. Model assembly equipment. 3. The means for moving the sprue in the longitudinal direction is a single-axis robot, the means for moving the sprue in the circumferential direction is a stepping motor, the unit model moving means is a horizontal articulated robot, and the means for moving the heating body is a simultaneous three-axis robot. The evanescent model assembly apparatus according to claim 1 or 2.