Polishing material supply device to be used for abrasive water jet processing device
Patent Information
- Application Number
- JP2022163636
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2022-10-12
- Publication Date
- 2024-12-26
- Estimated Expiration
- 2042-10-12
AI Technical Summary
Existing abrasive supply devices in abrasive water jet processing suffer from inefficiencies in transferring abrasive material between collection and pressure-feeding hoppers, leading to scattering and the need for stable, continuous supply with large capacity, along with the requirement for automatic ON/OFF switching during the pumping process.
The device includes a first tank, a second tank, an abrasive passage, and an opening/closing mechanism to efficiently transfer abrasive material, utilizing high-pressure pumps and controlled valves to ensure continuous supply and automatic switching, with sensors for monitoring abrasive levels and a compact design to minimize scattering and clogging.
The solution enables stable, continuous supply of abrasive material, minimizing scattering and clogging, and allows for automatic control of the supply process, enhancing work efficiency and ensuring consistent abrasive delivery to the nozzle.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to an abrasive supplying device for use in an abrasive water jet machining device. [Background technology]
[0002] Conventionally, abrasive supplying devices used in abrasive water jet machining generally use the pressure of an air compressor to pump the abrasive from an abrasive supplying tank that contains the abrasive. In such abrasive supplying devices, the abrasive is pumped through a pipe from the abrasive supplying tank to the abrasive nozzle.
[0003] Japanese Patent No. 2931238 (hereinafter referred to as Patent Document 1) discloses an abrasive recovery device having a mechanism for classifying, recovering, and replenishing abrasives (polishing materials). In this abrasive recovery device, the abrasives are pumped and circulated in hoppers that store the abrasives, such as a new material hopper, a recovery hopper, and a pressure-feed hopper.
[0004] Japanese Patent Publication No. 4881179 (hereinafter referred to as Patent Document 2) discloses that in order to stably supply abrasive to an abrasive nozzle, the abrasive pumped from an abrasive supply tank is stored in a measuring hopper and then pushed out using a needle valve. Summary of the Invention [Problem to be solved by the invention]
[0005] In Patent Document 1, the abrasive is supplied from the collection hopper to the pressure hopper by opening a stop valve located below the collection hopper or an open valve located above the pressure hopper. However, the collection hopper and the pressure hopper are separate members and are not connected, and a distance occurs when the collection hopper and the pressure hopper are connected. Therefore, when the abrasive is supplied, some of the abrasive may scatter around. Therefore, it is required to move the abrasive more efficiently between the collection hopper and the pressure hopper.
[0006] Patent Document 2 does not disclose the opening and closing valve and detailed structure of the abrasive supply tank.
[0007] In addition to a stable supply of abrasive from an abrasive supply tank, it is also required to use a large volume of abrasive to continuously supply the abrasive.
[0008] Additionally, in order to improve work efficiency, there is a demand for the development of a device that can automatically switch on and off the abrasive supply (pressure feeding) process.
[0009] An object of the present invention is to provide an abrasive supplying device for use in an abrasive water jet machining apparatus capable of continuously supplying an abrasive. [Means for solving the problem]
[0010] The first aspect of the present invention is a first tank containing an abrasive; a second tank disposed below the first tank and configured to accommodate the abrasive supplied from the first tank; an abrasive passage for moving the abrasive from the first tank to the second tank; an opening / closing mechanism for switching the opening and closing of the abrasive passage; The abrasive supply device is used in an abrasive water jet machining device.
[0011] The second aspect of the present invention is The abrasive supply device; A high-pressure pump for generating high-pressure water; an abrasive nozzle that sprays the abrasive supplied from the abrasive supply device together with high-pressure water supplied from the high-pressure pump; The abrasive water jet machining device has Effect of the Invention
[0012] According to the abrasive supply device used in the abrasive water jet machining apparatus of the present invention, abrasive can be continuously supplied. [Brief description of the drawings]
[0013] [Figure 1] Schematic diagram of an abrasive supplying device according to an embodiment [Diagram 2] FIG. 11 is a cross-sectional view showing details of an opening / closing mechanism according to an embodiment. [Diagram 3] FIG. 2 is a cross-sectional view showing a state in which an abrasive is supplied in the abrasive supplying device according to the embodiment; [Figure 4] FIG. 2 is a cross-sectional view showing a state in which the supply of abrasive is stopped by a first opening / closing part in the abrasive supplying device according to the embodiment; [Diagram 5] FIG. 1 is a cross-sectional view showing a state in which the supply of abrasive is stopped by a second opening / closing part in an embodiment of the abrasive supplying device. [Figure 6] FIG. 2 is a cross-sectional view showing a state in which the supply of abrasive is stopped by the first and second opening / closing parts in the abrasive supplying device according to the embodiment; [Figure 7] 1 is a cross-sectional view of an abrasive supplying device according to a first modified example. [Figure 8] 1 is a cross-sectional view of an abrasive supplying device according to a second modified example. [Figure 9] Schematic diagram of an abrasive water jet machining device using an embodiment BEST MODE FOR CARRYING OUT THEINVENTION
[0014] Next, an embodiment of the present invention will be described with reference to the drawings as appropriate.
[0015] As shown in Fig. 9, the abrasive supplying device 1 of this embodiment supplies an abrasive A to an abrasive nozzle 101 of an abrasive water jet processing device 100. For example, by spraying an abrasive water jet at a metal member or the like with the abrasive A mixed in the water jet, the metal member or the like can be cut or peeled off. The abrasive A may be made of any material such as garnet, alumina, silicon carbide, or the like, and may be commercially available. The particle shape and diameter of the abrasive A are not particularly limited.
[0016] As shown in FIG. 1, the abrasive supplying device 1 includes a first tank 2, a second tank 3, a support portion 4, a lid 5, and an opening / closing mechanism 6. The abrasive supplying device 1 includes a first tank 2, a second tank 3, a support portion 4, a lid 5, and an opening / closing mechanism 6.
[0017] The first tank 2 contains an abrasive A. The abrasive A is contained in the first tank 2 by manual work by an operator or by an automated work using a conveying device (not shown). The lid 5 is placed on the top of the first tank 2. For example, the first tank 2 is filled with the abrasive A by putting the abrasive A inside the first tank 2 with the lid 5 removed. If there is a possibility that impurities (contamination or foreign matter) or abrasives of a different size than the designated size are mixed in the abrasive A, a filter may be placed in the first tank 2. This makes it possible to make the particle size of the abrasive A uniform.
[0018] 3 to 6, a first tank abrasive amount reference line (upper limit) C1 and a first tank abrasive amount reference line (lower limit) C2 are set inside the first tank 2 and can be visually or electromagnetically confirmed. For example, by disposing a first tank upper limit sensor S1 and a first tank lower limit sensor S2 at the positions of the first tank abrasive amount reference line (upper limit) C1 and the first tank abrasive amount reference line (lower limit) C2, respectively, the amount of abrasive A can be electromagnetically confirmed next to the first tank 2 or remotely.
[0019] The second tank 3 is disposed below the first tank 2. The second tank 3 contains the abrasive A supplied from the first tank 2. The second tank 3 is a tank for supplying the abrasive A to the abrasive nozzle 101. If there is a possibility that impurities (contamination or foreign matter) or abrasives of a different size than the designated size are mixed in the abrasive A, a filter may be placed in the second tank 3. This makes it possible to make the particle size of the abrasive A uniform.
[0020] 3 to 6, the amount of abrasive A can be visually or electromagnetically confirmed by setting a second tank abrasive amount reference line (upper limit) C3 and a second tank abrasive amount reference line (lower limit) C4 inside the second tank 3. For example, by disposing a second tank upper limit sensor S3 and a second tank lower limit sensor S4 at the positions of the second tank abrasive amount reference line (upper limit) C3 and the second tank abrasive amount reference line (lower limit) C4, respectively, the amount of abrasive A can be electromagnetically confirmed next to the second tank 3 or remotely.
[0021] The support unit 4 supports the first tank 2 and the second tank 3. As shown in Fig. 1, the support unit 4 is composed of four support posts. Note that the number of support posts for the support unit 4 can be appropriately selected from three or five, etc., depending on the weight and arrangement of the first tank 2, the second tank 3, and the peripheral devices.
[0022] The lid 5 covers the top of the first tank 2 so as to prevent the abrasive A contained in the first tank 2 from scattering to the surroundings. The example shown in Fig. 1 shows the lid 5 having a handle. For a large-capacity first tank 2 that holds a large amount of abrasive A, the lid 5 may be automated. For example, the lid 5 may be connected to a part of the first tank 2, and the lid 5 may be opened and closed manually or electromagnetically.
[0023] The opening / closing mechanism 6 switches between opening and closing of the abrasive passage 6b between the first tank 2 and the second tank 3. As shown in FIGS. 1 to 6, the opening / closing mechanism 6 has an opening / closing mechanism main body 6a, an abrasive passage 6b, an air passage 6c, an inlet hole 6d, a discharge hole 6e, a first opening / closing section 7, and a second opening / closing section 8. The first opening / closing unit 7 and the second opening / closing unit 8 may be operated separately, or the first opening / closing unit 7 and the second opening / closing unit 8 may be operated simultaneously.
[0024] The opening / closing mechanism body 6a is disposed below the first tank 2. The opening / closing mechanism body 6a is fixed between the first tank 2 and the second tank 3. Inside the opening / closing mechanism body 6a, the abrasive A moves efficiently from the first tank 2 to the second tank 3.
[0025] The abrasive passage 6b is formed inside the opening / closing mechanism main body 6a. In order to drop the abrasive A from the first tank 2 to the second tank 3 in the direction of gravity, the abrasive passage 6b penetrates from the lower part of the first tank 2 to the upper part of the second tank 3. The abrasive passage 6b is, for example, cylindrical or polygonal, but is not limited thereto. Since the abrasive A is a hard material, a cover may be placed on the surface of the abrasive passage 6b or a coating may be applied so that the inside of the abrasive passage 6b is not damaged. For example, the abrasive passage 6b communicates with the air passage 6c. Therefore, a cover having a high hardness may be placed or a coating may be applied to the contact point between the abrasive passage 6b and the air passage 6c to reinforce the contact point.
[0026] The air passage 6c is formed in the opening / closing mechanism main body 6a. Air supplied from the driving source M (fourth driving source M4) passes through the air passage 6c. This prevents the abrasive A from scattering around or clogging the opening / closing mechanism main body 6a when switching between supplying and stopping the abrasive A. In addition, since the abrasive A is a hard material, a cover may be placed on the surface of the air passage 6c or a coating may be applied to prevent damage to the inside of the air passage 6c. For example, the air passage 6c communicates with the introduction hole 6d and the discharge hole 6e. Therefore, a hard cover may be placed or a coating may be applied to the area where the air passage 6c contacts the introduction hole 6d and the discharge hole 6e to reinforce the area.
[0027] When the partition plate 7a of the first opening / closing part 7 advances, the partition plate 7a is inserted into the air passage 6c and blocks the abrasive passage 6b. This stops the supply of the abrasive A from the first tank 2 to the second tank 3. The partition plate 7a is preferably in the shape of a plate. The air passage 6c desirably has a shape corresponding to the partition plate 7a.
[0028] The inlet hole 6d introduces air into the opening / closing mechanism main body 6a. Air supplied from the drive source M (fourth drive source M4) is introduced into the opening / closing mechanism main body 6a from the inlet hole 6d via an air hose or the like. The outlet hole 6e exhausts air from the opening / closing mechanism main body 6a to the outside. The advancement of the partition plate 7a stops the supply of abrasive A. The retreat of the partition plate 7a supplies abrasive A. At this time, abrasive A that adheres to or scatters above the partition plate 7a or in the air passage 6c is exhausted to the outside by air. This makes it possible to prevent clogging of the opening / closing mechanism 6 with abrasive A. Furthermore, the discharge hole 6e is connected to the first tank 2 via an air hose or the like, so that excess abrasive A can be circulated again.
[0029] The first opening / closing unit 7 temporarily switches between supplying and stopping the abrasive A from the first tank 2 to the second tank 3. The first opening / closing unit 7 switches between opening and closing the abrasive passage 6b by moving the partition plate 7a forward or backward using the driving cylinder 7b. The partition plate 7a can reduce the height of the abrasive supplying device 1. Specifically, it is desirable that the abrasive supplying device 1 has a height that can be reached by an operator (for example, about 100 to 180 cm). Since the weight of the abrasive supplying device 1 increases when the abrasive A accumulates, the partition plate 7a leads to a reduction in the weight of the abrasive supplying device 1.
[0030] The driving cylinder 7b advances or retreats the partition plate 7a by air supplied from the driving source M (second driving source M2). The driving cylinder 7b has a piston 7c, a front chamber 7d, and a rear chamber 7e. The piston 7c advances or retreats by supplying air from the driving source M (second driving source M2) to at least one of the front chamber 7d and the rear chamber 7e. For example, the partition plate 7a fixed to the front of the piston 7c advances by supplying air from the driving source M (second driving source M2) to the rear chamber 7e and advancing the piston 7c. The partition plate 7a retreats by supplying air from the driving source M (second driving source M2) to the front chamber 7d and advancing the piston 7c. In addition, the first opening / closing unit 7 in this embodiment is a cylinder type, but is not limited to this. The first opening / closing unit 7 may be any mechanism that can move forward and backward.
[0031] The partition plate 7a is fixed to the tip of the piston of the driving cylinder 7b. When the driving cylinder 7b advances, the partition plate 7a is inserted into the air passage 6c to close the abrasive passage 6b. This stops the supply of the abrasive A.
[0032] The partition plate 7a may be structured so that it is always in contact with the air passage 6c when the partition plate 7a advances or retreats within the air passage 6c, so that air within the air passage 6c does not leak. In this case, a seal member or a coating member may be formed on a part or the whole of the tip of the partition plate 7a. This allows the inner surface of the air passage 6c to be in constant contact with the outer surface of the partition plate 7a, thereby maintaining airtightness within the air passage 6c.
[0033] The second opening / closing unit 8 secondarily switches between starting and stopping the supply of the abrasive A from the first tank 2 to the second tank 3. The second opening / closing unit 8 has an outer member 8a and an inner member 8b on the outer periphery of the abrasive passage 6b. A gap is formed between the outer member 8a and the inner member 8b. When air is introduced into the air holes 8c formed in the outer member 8a, the inner member 8b converges inwardly, switching between opening and closing the abrasive passage 6b.
[0034] The outer member 8a and the inner member 8b form an abrasive passage 6b therein. The outer member 8a forms the abrasive passage 6b. The outer member 8a is, for example, cylindrical or polygonal, but is preferably cylindrical. The inner member 8b is disposed on the inner circumference of the outer member 8a. The inner member 8b has expandability. The inner member 8b is preferably made of a material such as rubber. The inner member 8b expands toward the inside of the abrasive passage 6b by air supplied from the driving source M (third driving source M3). This closes the abrasive passage 6b and stops the supply of the abrasive A from the first tank 2 to the second tank 3. Note that the inner member 8b does not need to be entirely expandable. The inner member 8b is composed of two types of members, one of which may be formed of a hard material such as stainless steel or metal similar to the outer member 8a, and the other of which may be formed of an expandable material such as rubber.
[0035] The air holes 8c are formed around the outer member 8a. Air supplied from the driving source M (third driving source M3) is introduced from the air holes 8c into the gap between the outer member 8a and the inner member 8b. Air in the gap between the outer member 8a and the inner member 8b is discharged to the outside from the air holes 8c.
[0036] The driving source M may be one that operates each function individually or one that operates the abrasive supplying device 1 in a centralized manner. The driving source M shown in Figs. 1 to 6 has a first driving source M1, a second driving source M2, a third driving source M3, and a fourth driving source M4, which are operated individually. The first driving source M1 supplies the abrasive A to the abrasive nozzle 101 by supplying air into the second tank 3. The second driving source M2 supplies or stops the abrasive A from the first tank 2 to the second tank 3 by the first opening / closing unit 7. The third driving source M3 supplies or stops the abrasive A from the first tank 2 to the second tank 3 by the second opening / closing unit 8. The fourth driving source M4 prevents clogging and scattering of the abrasive A in the opening / closing mechanism 6 by supplying air into the opening / closing mechanism main body 6a.
[0037] Here, the abrasive supplying device 1 of the modified example 1 will be described with reference to Fig. 7. The driving source M of this modified example centrally operates the first to fourth driving sources M1 to M4 of the embodiment. The abrasive supplying device 1 of this modified example has a first switching valve 9a, a second switching valve 9b, a third switching valve 9c, a fourth switching valve 9d, and a control device 10. The first switching valve 9a switches between supplying and stopping air into the second tank. The second switching valve 9b switches between advancing and retreating the partition plate 7a. The third switching valve 9c switches between supplying and stopping the abrasive A from the first tank 2 to the second tank 3 by the second opening / closing unit 8. The fourth switching valve 9d switches between supplying and stopping air into the opening / closing mechanism main body 6a. The control device 10 switches the various switching valves 9 according to the work process.
[0038] The control device 10 of this embodiment controls the amount and timing of the abrasive A supplied to the abrasive nozzle 101, while operating various elements. The control device 10 controls the drive source M (first to fourth drive sources M1 to M4) and the switching valves 9 (first to fourth switching valves 9a to 9d). The control device 10 also controls the drive source M and the switching valves 9 based on signals from various sensors (first tank upper limit sensor S1, first tank lower limit sensor S2, second tank upper limit sensor S3, and second tank lower limit sensor S4).
[0039] The second tank 3 supplies the abrasive A to the abrasive nozzle 101. Therefore, the space between the abrasive nozzle 101 and the second tank 3 (the inside of the high-pressure hose, etc.) is pressurized. Therefore, the second tank 3 is filled with air supplied from the driving source M (first driving source M1).
[0040] 7, a compressed air holding tank 12 is disposed between the driving source M (first driving source M1) and the second tank 3. The compressed air holding tank 12 holds reserve compressed air. This makes it possible to replenish the amount of air when the air pressure in the second tank 3 does not increase.
[0041] Also, a third opening / closing part 11 may be disposed between the second tank 3 and the abrasive nozzle 101. This prevents the air pressure in the high-pressure hose from the second tank 3 to the abrasive nozzle 101 from becoming unable to increase, and makes it possible to maintain the pressure in the second tank 3 at an appropriate level. The third opening / closing unit 11 has a mechanism similar to that of the first opening / closing unit 7 and the second opening / closing unit 8, for example.
[0042] In Modification 2 shown in Fig. 8, the central axis L1 of the first tank 2 and the central axis L2 of the second tank 3 are misaligned. In order to make the abrasive supplying device 1 more compact, it is desirable that the opening and closing mechanism 6 be accommodated inside the device. When the supply and stop of the abrasive A are switched by moving the partition plate 7a forward and backward as in the first opening and closing part 7, a compact configuration can be realized by locating the partition plate 7a on the inside. Also, the first tank 2 can accommodate a larger volume of abrasive A than the second tank 3. For example, when the first tank 2 is filled to the upper limit with abrasive A, the lower part of the first tank 2 is subjected to pressure equivalent to the weight of the abrasive A, and the surroundings become close to a solidified state. By shifting the central axis L1 of the first tank 2 and the central axis L2 of the second tank 3, the abrasive A is dropped into the second tank 3 from a position shifted from directly below the first tank 2, and the falling speed of the abrasive A is reduced, rather than dropping the abrasive A into the second tank 3 from a direction directly below the first tank 2.
[0043] 9, the abrasive supplying device 1 is used as a part of an abrasive water jet processing device 100. The abrasive water jet processing device 100 ejects high-pressure water generated by a high-pressure pump P from an abrasive nozzle 101 together with an abrasive A supplied from the abrasive supplying device 1. In this way, cutting, milling, peeling, chipping, etc. of the workpiece W is performed. The liquid ejected from the abrasive nozzle 101 is stored in a tank 102. The abrasive nozzle 101 can also process the workpiece W while moving in the X, Y and Z directions using a mechanism (not shown) that can move along the X, Y and Z axes.
[0044] The abrasive water jet machining apparatus 100 has a first flow path H1 and a second flow path H2. The first flow path H1 connects the second tank 3 and the abrasive nozzle 101. The second flow path H2 connects the high-pressure pump P and the abrasive nozzle 101.
[0045] The abrasive water jet machining apparatus 100 may have an abrasive supply on-off valve 90a and a high-pressure water supply on-off valve 90b. The abrasive supply on-off valve 90a is disposed in the first flow path H1. The abrasive supply on-off valve 90a starts or stops the intake of the abrasive A supplied from the abrasive supply apparatus 1 into the abrasive nozzle 101. The high-pressure water supply on-off valve 90b is disposed in the second flow path H2. The high-pressure water supply on-off valve 90b starts or stops the intake of high-pressure water supplied from the high-pressure pump P into the abrasive nozzle 101.
[0046] A method of using the abrasive supplying device of this embodiment will be described below. First, in a preparation step, an operator checks the amount of abrasive A contained inside the first tank 2 and the second tank 3. If it is the first time of use, the operator checks that there is no abrasive A in either tank. The driving source M is turned on to make the opening / closing mechanism 6 operable. At this time, the opening / closing mechanism 6 (the first opening / closing unit 7 and the second opening / closing unit 8) is in a closed state, and the supply of abrasive A is stopped.
[0047] An operator puts abrasive A into the first tank 2. Alternatively, when automating the process continuously, a conveying device may be automated from the storage location of abrasive A at the time of purchase and connected to the first tank 2. Alternatively, a crane may be placed above the abrasive supplying device 1, and bags or the like containing abrasive A may be sequentially transferred to the upper part by the conveying device, thereby supplying abrasive A in stages.
[0048] When the driving source M (second driving source M2, third driving source M3) is driven, the opening / closing mechanism 6 supplies the abrasive A from the first tank 2 to the second tank 3. When the second tank abrasive amount reference line (upper limit) C3 in the second tank 3 is reached, the opening / closing mechanism 6 closes and stops the supply of the abrasive A from the first tank 2 to the second tank 3.
[0049] Next, in the working process, the amount of abrasive A to be sprayed from the abrasive nozzle 101 is determined, and the operating conditions of the abrasive supplying device 1 are set. Specifically, the supply amount of abrasive A from the first tank 2 to the second tank 3 is set so as not to be excessive or insufficient relative to the discharge amount of abrasive A pumped from the second tank 3. When the amount of abrasive A in the second tank 3 reaches the second tank abrasive amount reference line (lower limit) C4, the opening / closing mechanism 6 is opened and abrasive A is supplied up to the second tank abrasive amount reference line (upper limit) C3. The opening / closing span of the opening / closing mechanism 6 is set according to the discharge amount of abrasive A, and abrasive A is supplied continuously. In addition, by using the second tank abrasive quantity reference line (upper limit) C3 and the second tank abrasive quantity reference line (lower limit) C4 as references, the air pressure required to pressurize the abrasive A can be stabilized without storing too much abrasive A in the second tank 3 at one time, and the abrasive A can be supplied continuously.
[0050] The supply amount and timing of the abrasive A may be changed in advance directly in the setting section of the drive source M or the control device 10, or may be remotely operated by displaying a setting screen on a tablet.
[0051] Next, in the processing step, the abrasive water jet processing device 100 is operated. Using a water jet mixed with abrasive A sprayed from the abrasive nozzle 101, various raw materials are processed for cutting, peeling, and the like. In order to stably supply abrasive A, the abrasive supply device 1 is operated. Abrasive A is pumped from the second tank 3, and abrasive A is sequentially supplied from the first tank 2 to the second tank 3. This allows the amount of abrasive A supplied to the abrasive nozzle 101 to be adjusted so that it is neither too much nor too little.
[0052] Finally, after the processing step is completed, the operation of the abrasive supplying device 1 is stopped by performing the steps in reverse to those of the preparation step.
[0053] As described above, the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be modified appropriately without departing from the spirit and scope of the present invention. [Explanation of symbols]
[0054] 1 Abrasive material supply device 2. First Tank 3. Second Tank 4 Support part 5 Lid 6 Opening and closing mechanism 6a Opening and closing mechanism body 6b Abrasive material passage 6c Air passage 6d Introduction hole 6e Exhaust hole 7 First opening and closing section 7a Partition 7b Driving cylinder 7c Piston 7d Antechamber 7e rear chamber 8 Second opening and closing section 8a Outer member 8b Inner member 8c Air vent 9a First switching valve 9b Second switching valve 9c Third switching valve 9d Fourth switching valve 10 Control device 11 Third opening and closing section 12 Compressed Air Holding Tank 100 Abrasive water jet processing equipment 101 Abrasive nozzle 102 Tank M Drive source M1 First driving source M2 Second driving source M3 Third Drive Source M4 4th driving source S1 First tank upper limit sensor S2 First tank lower limit sensor S3 Second tank upper limit sensor S4 Second tank lower limit sensor C1 First tank abrasive amount reference line (upper limit) C2 First tank abrasive amount reference line (lower limit) C3 Second tank abrasive amount reference line (upper limit) C4 Second tank abrasive amount reference line (lower limit) L1 Central axis of the first tank L2 Central axis of the second tank H1 First flow path H2 Second flow path
Claims
1. a first tank containing an abrasive; a second tank disposed below the first tank and configured to accommodate the abrasive supplied from the first tank; an abrasive passageway for moving the abrasive from the first tank to the second tank; an opening / closing mechanism for switching the opening and closing of the abrasive passage; An abrasive supplying device for use in an abrasive water jet machining device, comprising:
2. The opening and closing mechanism includes: A driving cylinder; A partition plate that can be advanced or retreated by the driving cylinder; A first opening and closing portion having An abrasive supply device for use in the abrasive water jet machining apparatus according to claim 1.
3. The opening and closing mechanism includes: an outer member disposed on an outer periphery of the abrasive passage and having an air passage through which air can be introduced; an inner member that is disposed on the outer circumference of the abrasive passage and on the inner circumference of the outer member, the inner member being configured to converge inwardly when air is introduced into the air passage hole, thereby switching between opening and closing of the abrasive passage; A second opening and closing portion having An abrasive supply device for use in the abrasive water jet machining apparatus according to claim 2.
4. The opening and closing mechanism includes: An opening / closing mechanism body; an introduction hole for introducing air into the inside of the opening / closing mechanism body; a discharge hole for discharging air to the outside of the opening / closing mechanism body; An abrasive supply device for use in the abrasive water jet machining apparatus according to any one of claims 1 to 3, comprising:
5. The air supply device further includes a switching valve for switching between supplying and stopping air to switch between opening and closing of the first opening / closing unit and the second opening / closing unit. An abrasive supply device for use in the abrasive water jet machining apparatus according to claim 3.
6. The central axis of the first tank is offset from the central axis of the second tank. An abrasive supplying device for use in the abrasive water jet machining apparatus according to any one of claims 1 to 3.
7. a third opening and closing portion for controlling discharge of the abrasive from the second tank; An abrasive supplying device for use in the abrasive water jet machining apparatus according to any one of claims 1 to 3.
8. Further comprising a compressed air holding tank for maintaining a constant pressure in the second tank. An abrasive supplying device for use in the abrasive water jet machining apparatus according to any one of claims 1 to 3.
9. The abrasive supplying device according to any one of claims 1 to 3, A high-pressure pump for generating high-pressure water; an abrasive nozzle that sprays the abrasive supplied from the abrasive supply device together with high-pressure water supplied from the high-pressure pump; An abrasive water jet machining apparatus comprising: