JPH0790463B2 - Casting deburring device and casting deburring method - Google Patents

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention is capable of downsizing, casting deburring equipment excellent in durability and economy, and automation, and can efficiently pollute the environment. The present invention relates to a method for deburring a casting, which enables deburring of a casting.

[0002]

2. Description of the Related Art Deburring work of castings is often performed manually, which requires a large number of man-hours and a wide working space. Therefore, the following method has been proposed as an improvement measure. (1) A method using a robot, (2) A method of injecting an abrasive from a nozzle with a high-pressure water flow of 10 MPa or more.

However, these methods are not economical because the apparatus for carrying them out is considerably large. Further, in the method of (1), when a dry abrasive is used, fine powder is generated and pollutes peripheral equipment and environment, so a dustproof device is required. Furthermore, in the device by the method of (2),
The nozzle that injects the abrasive material is easily painful and has a problem in durability.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in order to solve the above problems, and is capable of achieving downsizing, and has excellent durability and economical efficiency, and a deburring device for casting, and It is an object of the present invention to provide a deburring method for a casting, which can be automated, can efficiently deburr the casting without polluting the environment.

[0005]

The casting deburring apparatus of the present invention comprises a hopper for dropping a predetermined amount of a slurry-like abrasive mixed with a liquid from a lower discharge port, and a slurry-like abrasive dropped from the hopper. And a nozzle for accelerating the slurry-like abrasive in a desired direction by spraying a gas onto the slurry, and the plurality of nozzles are arranged at equal intervals around the dropping slurry-like abrasive and accelerate the slurry. It is characterized in that the shape-like abrasive material is made to collide with the burr of the casting to perform deburring. Further, the casting deburring method of the present invention is a method in which an abrasive is mixed with a liquid to form a slurry, the slurry abrasive is dropped, and an inert gas is sprayed onto the dropped slurry abrasive to obtain a desired slurry. It is characterized by accelerating in the direction of, and colliding the accelerated slurry-like abrasive material with the burrs of the casting to deburr.

[0006]

The sprayed gas accelerates the dropped slurry-like abrasive material to collide with the burrs of the casting, and the burrs are ground.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic vertical sectional view showing a casting deburring apparatus of the present invention, and FIG. 2 is a schematic plan view. Reference numeral 1 is a hopper, and 2 is a nozzle. The liquid is supplied from the inflow pipe 11 into the hopper 1, and the abrasive material 3 is supplied in the hopper 1.
Is in the form of a slurry. As the liquid to be supplied, tap water can be used, and a dispersant may be added thereto. The inflow pipe 11 extends tangentially at a position slightly below the top of the hopper 1 and has one end penetrating the side wall of the hopper 1. Reference numeral 12 denotes the one end of the inflow pipe 11, that is, the discharge port. The four inflow pipes 11 are provided so that the discharge ports 12 are arranged at equal intervals in the circumferential direction, and moreover,
The discharged liquid is provided so as to flow counterclockwise (in the direction of the arrow in FIG. 2) along the inner wall of the hopper 1 when viewed from above. The inflow pipe 11 is connected to a liquid supply source (not shown), and the amount of the discharged liquid can be freely set by a flow meter provided on the way. Reference numeral 13 denotes a lower discharge port of the hopper 1, which is closed with a lid (not shown) covered with neoprene, for example, when the abrasive material 3 in the form of a mud added with a liquid is charged into the hopper 1. ing. Further, the lower discharge port 13 is adapted to drop the slurry-like abrasive material 3 by a predetermined amount, and for example, the width of the frontage can be set.

The nozzle 2 is provided so that the tip 21 is located directly below the lower discharge port 13 so that gas can be blown to the slurry-like abrasive material 3 dropping. Air or an inert gas can be used as the gas. The tip 21 is open downward. For example, three nozzles 2 are provided so that the tips 21 are arranged at equal intervals in the circumferential direction, and the gas ejected from each nozzle 2 is set so as to be gathered at one point at a position below by a predetermined distance. It is set to generate a funnel-shaped flow in the counterclockwise direction. The nozzle 2 is connected to a gas supply source (not shown), and the strength of the gas to be ejected can be freely set by a pressure gauge interposed in the middle. Further, the angle of the tip 21 with respect to the dropping slurry-like abrasive material 3 is also adjustable, and the acceleration direction of the slurry-like abrasive material 3 can be arbitrarily adjusted by adjusting this angle and the strength of the ejected gas. It can be changed.

FIG. 3 shows an object to be ground having burrs to be ground, FIG. 3 is a side view, FIG. 4 is a plan view, and FIG. 5 is a view taken in the direction of arrow V in FIG. The object to be ground 40 has eight windows 41, and casting burrs 42 are formed in the windows 41. The object to be ground 40 is fixed on the surface plate 50, and the surface plate 50 is freely movable in the plane direction.

Deburring using the apparatus having the above structure is performed as follows. First, a lid is attached to the lower discharge port 13 of the hopper 1, and a mud-shaped product obtained by adding a predetermined amount of liquid to a predetermined amount of abrasive 3 is put into the hopper 1. Next, the liquid is discharged from the discharge port 12 of the inflow pipe 11, and at the same time, the lid is removed from the lower discharge port 13. As a result, a predetermined amount of the abrasive 3 becomes a slurry and is dripped from the lower discharge port 13. The liquid ejected from the ejection port 12 is ejected so as to rotate the inner wall of the hopper 1 in the counterclockwise direction.
Is efficiently slurried and is in a state in which a counterclockwise rotational force is applied when dropping. next,
The nozzle 2 is applied to the slurry-like abrasive 3 that is dropped.
A gas is blown from it to accelerate the abrasive 3 in a predetermined direction, that is, in the direction in which it extends, in the direction in which the desired burr 42 is present. The burr 42 is installed in advance at a position where the gas from each nozzle 2 is concentrated at one point. As a result, as shown in FIG. 6, the accelerated slurry abrasive 3 collides with the burr 42, and the burr 42 is ground. Since the counterclockwise rotational force is further applied to the accelerated slurry abrasive 3 by the gas ejected from the nozzle 2, the abrasive 3 is not limited to the force in the traveling direction, Since it also has a strong rotational force, the destructive force against the burr 42 is enhanced, and the burr 42 is efficiently ground.

Next, a concrete embodiment will be described. (Example 1) As the abrasive 3, the trade name "White A
Brax-N "(manufactured by Japan Abrasives Industry Co., Ltd.) was used. The abrasive 3 has a grain size of 60, a bulk specific gravity of 1.81, a specific gravity of 3.96, and an Al ₂ O ₃ content of 99.51%.
The liquid discharged from the inflow pipe 11 was tap water. The gas ejected from the nozzle 2 was air. As the object to be ground 40, a die casting product of ADC-12 type was used. The lower discharge port 13 of the hopper 1 has a diameter of 4 mm. 25 kg of abrasives and 13.9 tap water were added to the hopper 1.
It was set to kg. The position where the gas ejected from the nozzle 2 gathered at one point was 50 mm below the tip 21. And
30 pieces of the object to be ground 40 of about 360 g were prepared, and the air pressure ejected from the nozzle 2 under the above conditions was 3, 5 and 8 kg.
The burrs 42 of the windows 41 of the ten objects to be ground 40 were ground for each f / cm ² . That is, the number of burrs 42 ground by each air pressure is 80. Table 1 and FIG. 7 show the results.

[Table 1] In the conventional manual work, eight burrs 4 of one workpiece 40
It took 3 to 4 minutes to grind No. 2, but according to the apparatus of the present example under the above conditions, grinding could be performed in a very short time.

(Example 2) The liquid discharged from the inflow pipe 11 was mixed with tap water 100 with the dispersant 3 (weight ratio). As the dispersant, trade name "Shrek # 500" (manufactured by Daichi Chemical Co., Ltd.) was used, and it was mixed with tap water as a stock solution. Other conditions are Example 1
Same as Table 2 and FIG. 8 show the results.

[Table 2] According to the apparatus of this example under the above-mentioned conditions, Example 1
It was possible to perform grinding in a very short time as compared with. Since this uses a dispersant, the amount of tap water with respect to the abrasive is 17% less than in the case of Example 1, and the abrasive is dripped and accelerated, and the relative amount of abrasive grains It is considered that this is because grinding is performed in a high concentration state.

[0013]

INDUSTRIAL APPLICABILITY As described above, the deburring apparatus for castings according to the present invention is an abrasive material 3 which is mixed with a liquid to form a slurry.
1 for dripping a predetermined amount from the lower discharge port 13
And a nozzle 2 for spraying a gas onto the slurry-like abrasive 3 dropped from the hopper 1 to accelerate the slurry-like abrasive 3 in a desired direction. The nozzle 2 drops the slurry-like abrasive 3 A plurality of accelerated slurry-like abrasives 3 are placed at equal intervals around the periphery of the casting to produce a casting (workpiece 4 to be ground).
Since the deburring is performed by colliding with the burr 42 of 0), the following effects can be obtained. (1) Deburring can be performed in a very short time as compared with the conventional manual work. In particular, since the plurality of nozzles 2 are arranged at equal intervals around the dropping slurry-like abrasive 3, the slurry-like abrasive 3 can be efficiently accelerated and burrs of the slurry-like abrasive 3 can be efficiently performed. Four
It is possible to increase the degree of concentration in the area 2 and perform deburring more efficiently. (2) Since the main part of the device is composed only of the hopper 1 and the nozzle 2, the device can be downsized. Therefore, the economical efficiency can be improved. (3) Since only gas is ejected from the nozzle 2,
The durability of the nozzle 2 and thus the durability of the device can be improved as compared with the conventional device that ejected the abrasive. Therefore, also from this point, the economical efficiency can be improved.

In the method of deburring a casting according to the present invention, the abrasive 3 is mixed with a liquid to form a slurry, the slurry abrasive 3 is dropped, and the slurry abrasive 3 that is dropped is inert. It is characterized in that gas is blown to accelerate in a desired direction, and the accelerated slurry abrasive 3 is made to collide with the burr 42 of the casting (workpiece 40) to deburr. It produces the effect like. (1) Deburring can be performed in a very short time as compared with the conventional manual work. Moreover, deburring can be performed more efficiently by adding a dispersant to the liquid for producing the slurry-like abrasive 3. (2) Automation can be achieved. (3) Since it is a wet method in which the slurry-like abrasive 3 is sprayed, it is possible to prevent dust from being generated due to grinding, and to prevent environmental pollution. (4) Since the inert gas is used as the gas to be sprayed onto the slurry-like abrasive 3, the deburring portion of the object to be ground 40 can be non-oxidized. (5) In the conventional example in which the jet water stream is sprayed on the polishing agent, there is a drawback that the post-treatment of discarding or collecting the sprayed water is required, and the work and equipment for that are required and the work cost is increased. However, according to the method of the present invention,
There are no such drawbacks. That is, post-processing can be omitted, and the work cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing a casting deburring device of the present invention.

FIG. 2 is a schematic plan view showing a casting deburring device of the present invention.

FIG. 3 is a side view showing an object to be ground having burrs that are ground and removed.

FIG. 4 is a plan view showing an object to be ground.

FIG. 5 is a view on arrow V in FIG.

FIG. 6 is an enlarged view showing a state during a grinding operation by the casting deburring device of the present invention.

FIG. 7 is a diagram showing the results of Example 1.

FIG. 8 is a diagram showing the results of Example 2.

[Explanation of symbols]

 1 Hopper 2 Nozzle 3 Abrasive Material 13 Lower Discharge Port 40 Grinding Object (Casting) 42 Burr

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuta Takeda 29-8 Oyabunekitamachi, Kawachinagano City, Osaka Prefecture (56) Reference JP-A-3-66566 (JP, A) JP-A-2-95576 (JP , A)

Claims (3)

[Claims] 1. A hopper for dropping a predetermined amount of an abrasive, which is mixed with a liquid and becomes a slurry, from a lower discharge port,
A nozzle for spraying a gas onto the slurry-like abrasive material dropped from the hopper to accelerate the slurry-like abrasive material in a desired direction is provided, and a plurality of nozzles are provided at equal intervals around the dropped slurry-like abrasive material. A deburring device for a casting, which is individually arranged and is configured to collide accelerated slurry abrasive material with deburring of the casting to deburr the casting. 2. An abrasive is mixed with a liquid to form a slurry, the slurry abrasive is dropped, and an inert gas is sprayed onto the dropped slurry abrasive to accelerate it in a desired direction to accelerate it. A deburring method for a casting, which comprises deburring the resulting slurry-like abrasive material against the deburring of a casting. 3. The method for deburring a casting according to claim 2, wherein a dispersant is added to the liquid containing the abrasive as a slurry.