JP3348383B2 - Sand mold upper mold processing tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for machining an upper mold of a sand mold, and more particularly, to a tool for mounting an upper mold of a horizontally mounted sand mold attached to the tip of an arm of a multi-degree-of-freedom manipulator. The present invention relates to a tool for forming an upper mold of a sand mold for performing a drilling operation of a hot hole and the like.

[0002]

2. Description of the Related Art An upper mold for a sand mold used for the production of a casting encloses a model or a sprue sleeve which forms a product and a part to be determined by a casting method, such as a sprue, a feed hole, a vent hole, etc., with an outer frame. ,
After compressing the casting sand filled inside the outer frame so as to sufficiently cover the gate sleeve and the model, the model is extracted, and after that, the gas vent hole and the feeder hole are drilled, and the inside of the gate sleeve is removed. It is manufactured by removing the casting sand.

[0003] Conventionally, in order to replace the manual molding of the upper mold sand in a sand mold by an operator, a sand mold upper mold tool attached to the end of an arm of a multi-degree-of-freedom manipulator has two different intervals. There is known a gas venting tool including two drills having variable pitches so that two vent holes can be simultaneously drilled.

[0004]

However, as a conventional tool for machining an upper mold of a sand mold attached to the tip of an arm of a conventional manipulator, there is a tool for forming a gas vent hole in an upper mold sand. There is a demand for an upper mold processing tool for a sand mold, which has only a type and is capable of automating drilling of a feeder hole which is the most troublesome in manual work.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tool for machining an upper mold of a sand mold which can automatically perform at least drilling of a feeder hole.

[0006]

In order to solve the above-mentioned problems, a first sand mold upper die machining tool of the present invention is mounted on the tip of an arm of a multi-degree-of-freedom manipulator and is placed horizontally. A sand mold upper mold processing tool for processing the upper mold casting sand in a sand mold, and a cylindrical tool mounting base connected to a tip of a multi-degree-of-freedom manipulator arm,
A substantially semi-cylindrical feeder hole tool that is detachably connected to the tip of the tool mounting base via a tool changer and that drills a feeder hole in the upper mold sand. Features. The second upper mold tool for sand mold is a tool for upper mold processing of a sand mold which is attached to the tip of an arm of a multi-degree-of-freedom manipulator and processes the upper mold sand in a horizontally placed sand mold. There is a cylindrical tool mounting base connected to the tip of the multi-degree-of-freedom manipulator arm, and a gas vent hole mounted on the outer periphery of the tip of the tool mounting base at right angles to its axis, and in the upper mold sand. A rod-shaped degassing hole tool that drills a hole, and a semi-finished hole that drills a feeder hole in the upper mold sand is detachably connected to the tip of the tool mounting base via a tool exchanger. And various types of feeder hole tools having a cylindrical shape. The third upper mold tool for sand mold is mounted on the tip of the arm of the multi-degree-of-freedom manipulator and is used for machining the upper mold sand in the horizontally placed sand mold. A tool, a cylindrical tool mounting base connected to the tip of a multi-degree-of-freedom manipulator arm, and attached to the outer periphery of the tip of the tool mounting base at a right angle to its axis. A rod-shaped gas vent hole tool for drilling a vent hole, and attached to the outer periphery of the tip of the tool mounting base at right angles to the axis and at right angles or in line with the gas vent hole tool, and A pipe-shaped air blow tool that removes the casting sand in the gate by air blowing, and is detachably connected to the tip of the tool mounting base via a tool changer to drill a feeder hole in the upper mold sand Almost semi-cylindrical Characterized in that it comprises the various a feeder holes for tools.

In the first sand mold upper die machining tool, the operation of the manipulator inserts the feeder hole tool into the upper mold casting sand and makes about half a turn thereof to perform the drilling of the feeder hole. In the second sand mold upper die machining tool, the gas vent hole is made by inserting the gas vent hole tool into the upper mold sand by the operation of the manipulator, and the upper mold is produced by the same operation of the manipulator. The feeder hole is drilled by inserting the feeder hole tool into the casting sand of the mold and about a half turn thereof. Also, the third
In the upper die machining tool of the sand mold, the gas vent hole is drilled by inserting the gas vent hole tool into the upper mold sand by the operation of the manipulator,
Insertion of the tip of the air blow tool into the entrance of the upper gate gate sleeve by the operation of the same manipulator and removal of the molding sand in the gate sleeve by air blowing from the front end, and the upper die by the operation of the same manipulator The feeder hole is drilled by inserting the feeder hole tool into the casting sand and by about a half turn thereof.

As the manipulator having multiple degrees of freedom, a 6-axis vertical articulated robot or the like is used. The tool changer includes a master plate attached to the tip of the arm of the manipulator, and a tool plate attached to the master plate by pneumatic pressure so as to be separable and attached to the tool for the feeder hole. Change QC-20C (manufactured by LB Autotech Co., Ltd.) or the like is used.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an example of an embodiment of a sand mold upper mold working tool according to the present invention. As shown in FIG. 2, this sand mold upper mold processing tool 1 is mounted on the tip of an arm 2a of a multi-degree-of-freedom manipulator 2 such as a 6-axis vertical articulated robot, and is provided with a transfer device such as a drive roller conveyor. (Not shown), the casting sand 3a of the upper die 3 in the sand mold, which is horizontally positioned and fixed at a predetermined position, is formed by the operation of the manipulator 2 to form a gas vent hole and a feeder hole, and the inside of the sprue sleeve. Of the molding sand is removed by air blow. The upper mold 3 is usually in a state where a model (not shown) is extracted from the molding sand 3a which is filled and pressurized and compressed in the outer frame 3b, and the sprue sleeve 3c is inserted into the sprue. It is conveyed to a predetermined position, and the operation of the manipulator 2 is performed according to the position and the number of gas vent holes, the position of the feeder hole, and the diameter from a reference position (for example, the center of the upper die) defined on the various upper dies 3. Drive control is performed based on geometric data obtained by converting geometric information on the number and the number of gates and the position and number of gates.

At the end of the arm 2a of the manipulator 2,
As shown in FIG. 1 and FIG. 3, a cylindrical tool mounting base 4 having a hollow disk-shaped tool mounting portion 4a formed at a distal end portion (a lower end portion in FIG. 3) is provided at a base end portion (in FIG. The axis is connected to the arm 2a via the mounting flange 4b (upper end).
Are connected to each other so that the two axes are aligned. The tool mounting base 4 constitutes the tool 1 in combination with a gas vent hole tool, a feeder hole tool, and the like, which will be described later.
A rod-shaped (needle-shaped) degassing hole tool 5 which is inserted almost perpendicularly into the casting sand 3a of the upper die 3 by the operation of the manipulator 2 and drills a degassing hole is provided at the outer peripheral portion of the base end. It is mounted at right angles to the axis of the tool mounting base 4 via a mounting flange 5a of a portion (the left end in FIG. 1), and the tip (the right end in FIG. 1) of the gas vent hole tool 5 is cast. In order to reduce the resistance at the time of insertion into the sand 3a, it is provided in a sharp conical shape. A pipe-shaped outer peripheral portion of the tool mounting portion 4a of the tool mounting base 4 is inserted into the inlet of the gate sleeve 3c of the upper die 3 by the operation of the manipulator 2 to remove the molding sand 3a remaining there by air blowing. 1a and a base end of the main body 6a (FIG. 1).
The nozzle 6 has a mounting nut 6b provided at the right end (in FIG. 1), a cap nut screwed to the front end (the left end in FIG. 1) of the main body 6a, and has a large number of through-holes 7 provided on the outer periphery.
c, the air blow tool 6 comprising the mounting flange 6
The tool 5 is mounted at a right angle to the axis of the tool mounting base 4 and in line with the degassing hole tool 5 via b. The attachment of the degassing hole tool 5 and the air blow tool 6 to the tool mounting base 4 is not limited to the case where both are in a straight line. You may make a right angle. A tube (not shown) for supplying compressed air from a compressed air source in accordance with a command from the control device is connected to the base end of the air blow tool 6 via the inside of the tool mounting portion 4a.

On the other hand, at the tip of the tool mounting base 4,
Disc-shaped tool changer 8 in which various feeder hole tools corresponding to feeder hole diameters are detachably connected as described later.
However, it is attached by connecting the axis to the axis of the tool attachment base 4. The tool changer 8 includes a manipulator-side segment 8a attached to the tip of the tool attachment base 4.
And a tool-side segment 8b which is provided so as to be connectable and separable to the manipulator-side segment 8a by adjusting the air pressure and is individually attached to various feeder hole tools. ,
For example, Quick Change QC-20C (B.L.
Autotech Co., Ltd.) and the like are used.

The tool-side segment 8b of the tool changer 8
A substantially semi-cylindrical feeder hole tool 9 that is inserted approximately vertically into the casting sand 3a of the upper die 3 by the operation of the manipulator 2 and then is rotated about half to drill a feeder hole is attached. Have been. The feeder hole tool 9 is shown in FIGS.
As shown in FIG. 5, an oval mounting flange 9a whose axis is connected to the tool-side segment 8b of the tool-side segment 8b of the tool changer 8, and a mounting flange 9a.
A rod 9b of a required length suspended from the center of
b, a T-shaped bracket 9c that extends horizontally from the vicinity of the upper end in three directions at right angles, and the upper end is supported by each end of the bracket 9c, and the axis of the rod 9b is aligned with the axis (center of curvature). A semi-cylindrical body 9d having a length equal to the length from the mounting position of the bracket 9c on the rod 9b to the lower end of the rod 9b;
d to connect between the side edges of the lower end,
b, a reinforcing plate 9e in the form of a diametrically extending plate connected to the lower end of the main body 9b, and attached to the outer periphery of the upper end of the main body 9d so as to extend vertically at 90 ° intervals in the circumferential direction and operate the manipulator 2 And three trapezoidal chamfer plates 9f for chamfering the upper end edge of the feeder hole when it is rotated about half a turn. 1, 4 and 5, reference numeral 10 denotes a positioning pin which is horizontally planted on the opposed parallel outer periphery of the mounting flange 9a.
Is used to store various feeder hole tools 9 according to the diameter of the feeder hole and to store the feeder hole tool 9 in a tool changing device (not shown) having an automatic changing function. This is for positioning.

In the sand mold upper die machining tool having the above structure, the gas vent hole is drilled by inserting the gas vent hole tool 5 into the casting sand 3a of the upper mold 3 by the operation of the manipulator 2. Insertion of the tip of the air blowing tool 6 into the entrance of the gate 3c of the upper die 3 by operation of the manipulator 2 and removal of the molding sand 3a in the gate 3c by air blowing from the tip,
In addition, since the feeder hole tool 9 is inserted into the casting sand 3a of the upper die 3 by the operation of the manipulator 2 and the feeder hole is drilled by about a half turn thereof, the operation of one manipulator 2 causes It is possible to automatically and continuously perform a process of forming a gas vent hole and various feeder holes in the casting sand 3a of the upper die 3 in the sand mold, and removing the casting sand 3a in the gate sleeve.

FIGS. 8, 9 and 10 are a front view, a right side view and a plan view of a main part of another example of the embodiment of the sand mold upper die working tool according to the present invention. This sand mold upper mold processing tool 1 'is a modified part of a feeder hole tool 9'. The above-described embodiment is different from the above-described embodiment in that a trapezoidal 3 is formed on the outer periphery of the upper end of the main body 9d. 9f chamfer plate
Are vertically extended at 90 ° intervals in the circumferential direction, and the feeder hole tool 9 is inserted into the casting sand 3a of the upper die 3 by the operation of the manipulator 2, and the feeder hole is rotated by about half a turn thereof. In addition to performing the chamfering process on the upper end edge of the main body 9d, a semicircular chamfering member 9g having a hollow triangular cross section is attached to the outer periphery near the upper end portion of the main body 9d. The manipulator 2 is actuated by mounting a semi-circular plate-like molding sand holding plate 9h made of hard rubber extending outward from the chamfering member 9g via a semi-circular plate-shaped holding plate 9i on the upper surface of the chamfering member 9g. Insertion of the feeder hole tool 9 'into the casting sand 3a of the upper die 3 by the above-mentioned method and the rotation of about half a turn thereof to make a hole of the feeder hole, and the chamfering member 9g and the casting sand holding plate 9h at the time of insertion. To By that pressure compressor, as in the case of using the feeder hole tool 9 is obtained by so chamfering the upper edge of the feeder holes.

By doing so, the molding sand 3a at the upper edge of the feeder hole is compressed, so that the strength of that portion can be increased. Since other configurations, functions and effects are the same as those of the above-described embodiment, the same reference numerals are given to components and the like having the same functions, and description thereof will be omitted.

In the above-described embodiment, the upper die machining tools 1 and 1 'including the gas vent hole tool 5, the air blow tool 6, and the feeder hole tools 9 and 9' have been described. The present invention is not limited to this, and may be used as a tool for upper die machining provided with only the tool 9, 9 ′ for the feed hole or the tool 5 for the gas vent hole and the tool 9, 9 ′ for the feed hole as required. Good thing.

[0017]

As described above, according to the first sand mold upper die machining tool of the present invention, the insertion of the feeder hole tool into the upper mold casting sand by the operation of the manipulator and its approximately half turn. Since the feeder hole is drilled by this, various feeder holes can be automatically drilled by attaching / detaching the feeder hole tool. According to the second sand mold upper die machining tool, the gas vent hole is drilled by inserting the gas vent hole tool into the upper mold sand by operating the manipulator, and the same manipulator operates. Since the feeder hole is drilled by inserting the feeder hole tool into the upper mold sand and about half a turn of it, one manipulator can be used to remove and replace the gas vent hole and the feeder hole tool. Drilling of various feeder holes can be continuously and automatically performed. In addition, according to the third sand mold upper die machining tool, the gas vent hole is drilled by inserting the gas vent hole tool into the upper mold sand by the operation of the manipulator, and the same manipulator can be used. The insertion of the tip of the air blow tool into the inlet of the upper gate sleeve by the operation and the removal of the molding sand in the gate sleeve by the air blowing from the distal end, and the removal of the molding sand of the upper mold by the operation of the same manipulator. The drilling of the feeder hole is performed by inserting the feeder hole tool and about a half turn thereof, so that one manipulator drills out the gas vent hole, removes the casting sand in the sprue sleeve, and raises the feeder. Drilling of various feeder holes by detaching and replacing the hole tool can be continuously and automatically performed.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of a sand mold upper die working tool according to the present invention.

FIG. 2 is an explanatory diagram showing a use state of the upper mold processing tool in FIG. 1;

FIG. 3 is a half sectional front view of a tool mounting base in the upper die machining tool of FIG. 1;

FIG. 4 is a right side view of the feeder hole tool in the upper die machining tool of FIG. 1;

FIG. 5 is a plan view of a feeder hole tool in the upper mold processing tool of FIG. 1;

FIG. 6 is an end view taken along line VI-VI in FIG. 4;

FIG. 7 is an end view taken along the line VII-VII in FIG. 4;

FIG. 8 is a front view of a feeder hole tool, which is a main part of another example of the embodiment of the sand mold upper die working tool according to the present invention.

FIG. 9 is a right side view of the feeder hole tool of FIG. 8;

FIG. 10 is a plan view of the feeder hole tool of FIG. 8;

[Explanation of symbols]

 Reference Signs List 1 upper mold processing tool 1 'upper die processing tool 2 manipulator 2a arm 3 upper die 3a casting sand 3c sprue sleeve 4 tool mounting base 5 gas vent hole tool 6 air blow tool 8 tool changer 9 tool for hot hole 9 'Tool for Feeder Hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-16327 (JP, A) JP-A-11-77243 (JP, A) JP-A 8-141700 (JP, A) JP-A 61-77 92755 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22C 23/00

Claims (3)

(57) [Claims] An upper mold processing tool for a sand mold mounted on a tip of an arm of a multi-degree-of-freedom manipulator and processing an upper mold sand in a horizontally placed sand mold. A cylindrical tool mounting base connected to the tip of the manipulator arm, and a removable tool connected to the tip of the tool mounting base via a tool changer to drill feeder holes in the upper mold sand An upper mold processing tool for a sand mold, comprising: various types of feeder holes having a substantially semi-cylindrical shape. 2. An upper mold processing tool for a sand mold mounted on a tip of an arm of a multi-degree-of-freedom manipulator and working on an upper mold sand in a horizontally placed sand mold. A cylindrical tool mounting base connected to the tip of the arm of the manipulator, and a rod shaped to be attached to the outer periphery of the tip of the tool mounting base at a right angle to the axis, and to form a gas vent hole in the upper mold sand. Gas venting tools,
A substantially semi-cylindrical feeder hole tool that is detachably connected to the tip of the tool mounting base via a tool changer and that drills a feeder hole in the upper mold sand. Characteristic tool for upper mold processing of sand mold. 3. An upper mold processing tool for a sand mold mounted on a tip of an arm of a multi-degree-of-freedom manipulator and configured to process an upper mold sand in a horizontally placed sand mold. A cylindrical tool mounting base connected to the tip of the arm of the manipulator, and a rod shaped to be attached to the outer periphery of the tip of the tool mounting base at a right angle to the axis, and to form a gas vent hole in the upper mold sand. Gas venting tools,
A pipe-shaped air-blowing tool that is mounted on the outer periphery of the tip of the tool mounting base at right angles to the axis thereof and at right angles or in line with the degassing hole tool, and removes molding sand in the upper mold gate by air blowing. , Is attached detachably to the tip of the tool mounting base via a tool changer,
What is claimed is: 1. A tool for machining an upper mold of a sand mold, comprising: various kinds of tools for a substantially semi-cylindrical feeder hole for drilling a feeder hole in an upper mold sand.