JP5002869B2 - Air blasting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air blasting apparatus in which processing such as deburring, scaling off, or peening of metal machine parts such as automobile parts as workpieces is performed by an injection material injected from a nozzle by compressed air. .
[0002]
[Prior art]
2. Description of the Related Art Air blasting apparatuses are widely used to perform deburring, scaling, or peening of metal machine parts such as automobile parts. As this type of air blasting apparatus, a batch type air blasting apparatus having one pressure tank 81 as shown in FIG. 4 or a continuous type having an upper pressure tank 82 and a lower pressure tank 83 as shown in FIG. There is a type air blasting device.
[0003]
However, in the above-described batch type air blasting apparatus, in order to process a large number of machine parts by charging the injection material into the pressure tank 81 once, the internal capacity of the pressure tank 81 is as large as 38 liters , for example. The height of the was also close to 1m and was big. Also in the continuous air blasting apparatus, the internal capacity of each of the upper pressure tank 82 and the lower pressure tank 83 was as large as 130 liters, and the height of the entire apparatus was as large as about 2.5 m. That is, in any type of air blasting device, the pressure tank has a large capacity, so the installation of the air blasting device requires a large installation area and space, and the device is also large. The initial cost also increased, and there was a problem that once installed, it could not be easily moved or modified.
[0004]
In the continuous air blast device, the injection material is temporarily stored in the upper pressure tank 82 in the first step, and then the injection material is supplied from the upper pressure tank 82 to the lower pressure tank 83 in the second step. However, the supply of the injection material to the upper pressure tank 82 is, as shown in FIG. 6, provided with a piping system in the upper pressure tank 82, and at one end thereof, a supply valve that moves up and down by pressurizing and depressurizing compressed air. 41 is provided, when supplying the injection material, the compressed air is depressurized, the supply valve 41 is lowered, the supply port 21 communicating with the supply hopper 14 is opened, and the injection material is replenished in a fixed amount. The supply port 21 is closed by raising the supply valve 41. Similarly, the supply of the injection material to the lower pressure tank 83 is provided at the upper portion of the lower pressure tank 83 with the above-described replenishing valve 41 that opens and closes the supply port 21 that connects the upper pressure tank 82 and the lower pressure tank 83. Therefore, the replenishing valve 41 is moved up and down by compressed air to replenish the injection material. In the batch type air blasting apparatus, the same replenishment valve 41 is moved up and down by compressed air to replenish the injection material. However, when the replenishing valve 41 is moved up and down by compressed air each time the injection material is supplied, the compressed air must be pressurized or depressurized, leading to waste of compressed air and loss of energy.
[0005]
6 is disposed in the pressure tank 81, the upper pressure tank 82, and the lower pressure tank 83, the supply valve 41 is opening the supply port 21 or is closed. It is difficult to confirm whether it is in the middle, and it will be time-consuming to deal with a problem in the supply of the injection material.
[0006]
[Problems to be solved by the invention]
The present invention solves the above-described problems, is small in size and easy to carry and install, and can easily perform trouble handling when a problem occurs in the supply of the injection material. The present invention has been made to provide an air blasting apparatus capable of performing an effective blasting process by minimizing the amount of the spray material and compressed air used by performing a blast process with a necessary amount of the propellant.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a pressure tank for storing an injection material, a replenishing valve for opening and closing a supply port provided at the top of the pressure tank by an external drive device, and a supply port connected to the supply port. An air blast provided with an injection material supply cylinder disposed below the hopper, and an injection nozzle 6 for injecting the injection material mixed with the compressed air at the lower orifice of the pressure tank and pressure-fed through the pipe onto the workpiece. In the apparatus, the internal volume of the pressure tank is a small-capacity tank in the range of 0.5 to 2.0 liters capable of storing an amount of injection material necessary for blasting one workpiece, and at the top of the supply cylinder the side surface near provided level sensor to allow storage only amounts necessary to blasting one workpiece by sensing from outside the amount of injection material supplied from the supply hopper, it noted and, Serial pressure tank provided the compressed air supply opening, further injection nozzle described above is provided for every one one pressure tank, according to an air blast device being characterized in that to enable continuous blasting to claim 1 Invention.
A plurality of the air blast devices according to claim 1 are connected in series to form a set, and a unit with a level sensor is formed above the pressure tank of the air blast device via the supply cylinder. Each supply hopper is provided with an injection material supply hopper, and further, an extended supply line with a gate for supplying the injection material to each supply hopper is arranged in conjunction with the level sensor at the top of each supply hopper, The invention according to claim 2 is such that blasting of one or a plurality of workpieces can be simultaneously performed by blasting from the spray nozzles provided in each of the plurality of air blasting devices .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1, 2, and 3.
Reference numeral 1 denotes an injection material supply cylinder installed in the upper part of the pressure tank 8. The pressure tank 8 is provided at its upper part with a supply port 2 communicating with the supply tube 1 and a conical refill valve 4 for opening and closing the supply port 2 by an external drive device 3. Is provided with a supply hopper 12 for the injection material, and a level sensor 9 for detecting the amount of the injection material is provided in the vicinity of the side surface of the supply cylinder 1. On the other hand, an orifice 7 is provided at the lower part of the pressure tank 8, and this orifice communicates with the pipe 5, and a nozzle 6 is attached to the tip of the pipe 5.
[0009]
The injection material thrown into the supply hopper 12 is supplied to the lower supply cylinder 1 by opening the damper 10. The supply cylinder 1 is transparent using resin or the like, and the level sensor 9 is an optical sensor or the like. By detecting the level of the propellant using, the propellant can be quantitatively supplied to the supply cylinder 1. Further, when supplying the injection material to the pressure tank 8, the external drive device 3 is driven to lower the supply valve 4 downward to open the supply port 2, thereby supplying the injection supplied into the supply cylinder 1. The material can be supplied to the pressure tank 8. And after supplying an injection material, the supply valve 4 is raised and the supply port 2 is closed. Although the illustrated external drive device 3 is of a cylinder type, an appropriate method such as a motor drive method or a solenoid valve method can be used, and the level sensor 9 is also limited to the above-described optical sensor. It is not a thing.
[0010]
7 is an orifice provided in the lower part of the pressure tank 8, and in blasting, compressed air of 0.3 to 0.4 MPa sent from the compressed air feeding port 20 is injected into the injection material through the orifice 7. Then, the mixed flow of the injection material and the compressed air is pumped to the nozzle 6 through the pipe 5, and is injected from the tip of the nozzle 6 toward the workpiece to be processed.
[0011]
The pressure tank 8 described above has a small capacity enough to store an injection material in an amount necessary for one cycle of blasting on a single work. Specifically, the internal capacity is 2 It is desirable to make it not more than 1 liter , especially 1.5 to 0.5 liter . The reason is that portable compact lightweight can be an easy air blast device by more than 2 liters, in particular, one of the work more lightweight by the inner volume and 1.5 to 0.5 liters Can be stored in the pressure tank 8. For example, when deburring a transmission gear having an outer diameter of φ160 of an automobile, the inner volume of the pressure tank 8 is set to 1 liter. By supplying the spray material for about the eighth minute, one workpiece can be blasted for only one cycle. The air blasting apparatus of the present invention shown in FIGS. 1 and 2 has a height of about 200 mm, which is significantly lower than the conventional air blasting apparatus.
[0012]
In such an air blasting device, the damper 10 is opened during the blasting of the workpiece, and the injection material is supplied from the supply hopper 12 to the supply cylinder 1 by the level sensor 9 while detecting the amount thereof. Next, while the blasting is finished and the workpiece of the next cycle is set at a predetermined position, the supply port 2 is opened to replenish the injection material in the supply cylinder 1 to the pressure tank 8, and when the replenishment is completed, the supply port 2 is sealed by the replenishing valve 4. As soon as these operations are completed, the injection material is injected from the nozzle 6 to start the blasting of the next cycle. By the series of processes as described above, even if the pressure tank 8 has a small capacity capable of storing only a spray material capable of blasting one workpiece for one cycle, the workpiece can be blasted continuously. it can.
[0013]
Further, when it is desired to shorten the blasting time of one workpiece or when blasting a plurality of workpieces simultaneously, a plurality of nozzles 6 are required. A plurality of the blasting devices that have been made are connected in series. FIG. 3 is a view showing an embodiment in which four blasting apparatuses of the present invention are arranged in series, and a unit with a level sensor 11 for opening and closing a damper 10 via the supply cylinder 1 above the pressure tank 8. The supplied injection material supply hopper 12 has a capacity equivalent to the internal capacity of the pressure tank 8. Further, on each supply hopper 12, an extendable supply line 13 with a gate (not shown) for supplying an injection material to each supply hopper 12 in conjunction with the level sensor 11 is disposed. By combining a plurality of air blasting devices in one set as described above, the spray material is sprayed from the plurality of nozzles 6 to shorten the blasting time for one workpiece, or to simultaneously combine a plurality of workpieces. Can be blasted.
[0014]
【Effect of the invention】
As described above, the air blasting apparatus according to the present invention is a pressure tank that stores an injection material, and has a small capacity that can store only an amount of the injection material necessary for blasting one workpiece. A replenishment valve that opens and closes a pressure tank having an orifice for mixing an appropriate amount of stored spray material with compressed air supplied from the outside and pumping it to a single spray nozzle. Because it is connected to the supply cylinder of the injection material through the blasting process, it can always be blasted with a fixed amount of injection material required for one workpiece, and efficient processing with minimal use of the injection material and compressed air Can be performed. In addition, the present invention can be easily carried by reducing the size significantly compared to the conventional air blasting device. In addition, if the supply cylinder is provided with a level sensor for detecting the volume of the injection material, a constant amount of the injection material necessary for blasting one workpiece can always be supplied to the pressure tank. Further, according to the present invention, the injection material in the supply cylinder is replenished to the supply cylinder while the work is being blasted, and when the work of the next cycle is set at a predetermined position after the blasting is completed. Since the material can be replenished to the pressure tank, and then the blasting of the next cycle can be started by immediately injecting the spraying material from the nozzle, the blasting of the workpiece can be performed continuously. Further, by connecting a plurality of the air blasting devices as a set, the blasting time of one work can be shortened by a plurality of nozzles, or a plurality of works can be blasted simultaneously. . Furthermore, in the present invention, it does not take time for expansion and reduction, and for example, when a change in equipment plan or the like occurs, it can be easily dealt with without requiring a large remodeling or a large expense. In addition, since the open / close state of the replenishing valve can be determined based on the operating state of the external drive device, there are various advantages such as being able to quickly cope with a trouble in supplying the injection material.
Therefore, the air blasting apparatus of the present invention is small in size and can be moved and installed easily because it can solve the problems of the conventional air blasting apparatus and minimize the amount of injection material and compressed air to be used for efficient blasting. In addition, it has a great industrial value as an inexpensive one.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a preferred embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is a front view showing an embodiment in which four air blasting devices are connected in series.
FIG. 4 is a front view of a conventional batch type air blasting apparatus.
FIG. 5 is a front view of a conventional continuous air blasting apparatus.
FIG. 6 is a cross-sectional view illustrating details of a conventional refill valve.
[Explanation of symbols]
1 Supply tube
2 Supply port 3 External drive unit
4 Supply valve 5 Piping 6 Injection nozzle 7 Orifice 8 Pressure tank 9 Level sensor
11 level sensor
12 supply hopper
13 supply lines

Claims (2)

A pressure tank (8) for storing the propellant, a replenishing valve (4) for opening and closing a supply port (2) provided at the top of the pressure tank (8) by an external drive device (3), and a supply port (2) Compressed air is mixed with the injection material supply cylinder (1) disposed below the supply hopper (12) and the lower orifice (7) of the pressure tank (8) through the pipe (5). In an air blasting device equipped with an injection nozzle (6) that injects the injected spray material onto the workpiece, the internal capacity of the pressure tank (8) is stored in an amount necessary for blasting one workpiece. A small-capacity tank in the range of 0.5 to 2.0 liters can be made, and the amount of the injection material supplied from the supply hopper (12) is detected from the outside in the vicinity of the upper side surface of the supply cylinder (1). level sensor to allow storage only amounts necessary to blasting one workpiece (9) is provided, besides, the pressure Tan Compressed air supply ports (8) to (20) is provided, further, the above-mentioned injection nozzle (6) is provided one per one pressure tank (8), characterized in that allowed the continuous blasting Air blasting device. A plurality of air blasting devices according to claim 1 are connected in series to form a set, and a level sensor (11) is provided above the pressure tank (8) of the air blasting device via the supply cylinder (1). Unitized injection material supply hoppers (12) are provided respectively, and furthermore, the upper part of each supply hopper (12) is linked to the level sensor (11) and the injection material is supplied to the individual supply hoppers (12). An extendable supply line (13) with a supply gate is arranged, and blasting of one or a plurality of workpieces is simultaneously injected from the injection nozzles respectively provided in the plurality of air blast devices. An air blasting device that can be blasted.

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