Cutting device for magnesium alloy pipe production

Abstract

The invention discloses a cutting device for magnesium alloy pipe production, and relates to the technical field of magnesium alloy processing equipment, the cutting device comprises a support provided with a clamping assembly and a cutting assembly, a positioning assembly is arranged below the clamping assembly, and the support comprises two supporting frames arranged left and right at an interval and connecting rods arranged below the two supporting frames front and back; the clamping assembly comprises positioning discs which are arranged on the two supporting frames correspondingly and used for fixing the magnesium alloy pipe, and fixing structures are arranged in the positioning discs. The cutting assembly comprises a cross beam transversely arranged at the tops of the two supporting frames, a cutting machine arranged on the cross beam, a left-right moving structure driving the cutting machine to move left and right and a front-back moving structure driving the cutting machine to move front and back. The positioning assembly comprises two positioning rods which are arranged below the positioning disc front and back, and positioning seats are arranged on the positioning rods in a sliding mode; the problems that in the existing magnesium alloy pipe positioning process, positioning is not stable easily, and the method cannot be suitable for magnesium alloy pipes of various models can be solved.

Description

Technical Field

[0001] This application relates to the technical field of magnesium alloy processing equipment, and more specifically, to a cutting device for the production of magnesium alloy pipes. Background Technology

[0002] Magnesium alloy tubing, with its lightweight, high strength, shock absorption, and heat dissipation properties, is rapidly gaining traction in automotive lightweighting, new energy, aerospace, and 3C (computer, communication, and consumer electronics) sectors, showing particular potential in electric vehicle structural components and energy storage systems. However, the production process of magnesium alloy tubing requires cutting it to obtain the desired length. Existing magnesium alloy tubing cutting devices suffer from unstable positioning and inconvenient adjustment after positioning, making them unsuitable for various types of magnesium alloy tubing simultaneously. Summary of the Invention

[0003] The main purpose of this application is to provide a cutting device for the production of magnesium alloy pipes, so as to improve the problem that the current positioning process of magnesium alloy pipes is prone to unstable positioning and cannot be applied to various types of magnesium alloy pipes.

[0004] To achieve the above objectives, this application provides the following technology: a cutting device for producing magnesium alloy pipes, including a bracket, on which a clamping component for clamping magnesium alloy pipes and a cutting component for cutting magnesium alloy pipes are provided, and a positioning component for positioning the cutting component is provided below the clamping component. The bracket includes two support frames spaced apart on the left and right, and a connecting rod arranged at the front and rear below the two support frames. The clamping assembly includes positioning discs for fixing magnesium alloy pipes, which are respectively mounted on two support frames, and the positioning discs are provided with fixing structures; the cutting assembly includes a crossbeam horizontally mounted on the top of the two support frames, a cutting machine mounted on the crossbeam, a left-right moving structure for moving the cutting machine left and right, and a front-back moving structure for moving the cutting machine back and forth; the positioning assembly includes two positioning rods mounted front and back below the positioning discs, and positioning seats are slidably mounted on the positioning rods.

[0005] Furthermore, the fixing structure includes a positioning screw disposed in the positioning plate and a sleeve disposed on the positioning screw. The sleeve is provided with a plurality of rotatably connected connecting rods evenly spaced apart. The top end of the connecting rod is rotatably connected to an arc-shaped positioning plate. The upper end of the positioning screw is rotatably connected to the positioning plate. The positioning plate has a sliding groove through which the connecting rod passes. The two sides of the sliding groove have positioning slots for connecting the arc-shaped positioning plate and allowing it to slide on the positioning plate.

[0006] Furthermore, the left-right moving structure includes a first drive motor mounted on the left support frame, a first threaded rod mounted inside the crossbeam and passing through the left support frame to connect with the output end of the first drive motor, and a moving part mounted on the first threaded rod.

[0007] Furthermore, the moving component includes a moving plate connected to the first threaded rod and a vertical plate disposed on the moving plate for mounting a front-to-back moving structure. The front-to-back moving structure includes a fixed plate disposed below the vertical plate. A telescopic cylinder is disposed on the fixed plate, and the output end of the telescopic cylinder is connected to the cutting machine. A slide rail for moving the vertical plate left and right is disposed on the outer side wall of the crossbeam.

[0008] Furthermore, the positioning base is provided with two arc-shaped positioning platforms spaced apart on the left and right, and a signal transmitter is provided between the two arc-shaped positioning platforms. The cutting machine is provided with a signal receiving target that matches the positioning device. The positioning rod is provided with a positioning structure for positioning the positioning base. The signal receiving target is electrically connected to the first drive motor and has the same control module.

[0009] Furthermore, the positioning structure includes two second threaded rods respectively disposed inside the two positioning rods. The two sides of the positioning seat are respectively threadedly connected to the two second threaded rods. A motor box on the right support frame is provided with a second drive motor. A rotating rod is provided at the output end of the second drive motor. Two first helical gears are respectively provided at both ends of the rotating rod. A second helical gear that meshes with the first helical gear is provided on each of the two second threaded rods.

[0010] Furthermore, a collection trough for receiving magnesium alloy debris is provided below the positioning component. A funnel-shaped sedimentation tank with two sides concave towards the center is provided inside the collection trough. A multi-layer filter plate with progressively smaller apertures from top to bottom is provided below the sedimentation tank. A wastewater collection tank is provided below the filter screen.

[0011] Furthermore, the support frame is provided with reinforcing ribs to increase the connection strength of the various components.

[0012] Compared with the prior art, this application can bring the following technical effects: The cutting device for producing magnesium alloy pipes of the present invention positions the magnesium alloy pipes by setting positioning plates on two support frames respectively. After positioning is completed, the magnesium alloy pipes are fixed by a fixing structure, which facilitates the subsequent cutting of magnesium alloy pipes. The fixing structure can be adjusted according to the size of the magnesium alloy pipes, so it is suitable for fixing different types of magnesium alloy pipes and making the cutting process more convenient. The cutting device for magnesium alloy pipe production of the present invention first positions the required size of the magnesium alloy pipe to be cut by a positioning component when cutting a fixed magnesium alloy pipe. Then, the left and right moving structure drives the cutting machine to move left and right according to the position of the positioning component. After moving to the required position, cutting is performed. During cutting, the front and back moving structure drives the cutting machine to move back and forth to complete the cutting of the magnesium alloy pipe. The positioning is more accurate and the use is more convenient. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a structural diagram of the present invention; Figure 2 This is a schematic diagram of the fixing structure in this invention; Figure 3 This is a schematic diagram of the positioning structure in this invention; Figure 4 This is a cross-sectional view of the collection tank in this invention.

[0014] In the figure: bracket (1), support frame (101), connecting rod (102); clamping assembly (2), positioning plate (201), positioning screw (202), sleeve (203), connecting rod (204), arc positioning plate (205), positioning plate (206), slide groove (207), positioning slot (208); cutting assembly (3), crossbeam (301), cutting machine (302), first drive motor (303), moving plate (304), vertical plate (305), fixed plate (306), slide rail (307); positioning assembly (4), positioning rod (401), positioning seat (402), arc positioning platform (403), signal transmitter (404), second threaded rod (405), second drive motor (406), rotating rod (407), first helical gear (408), second helical gear (409); collection tank (5), sedimentation tank (501), filter plate (502), wastewater collection tank (503). Detailed Implementation

[0015] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0016] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0017] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0018] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0019] In addition, the term "multiple" should mean two or more.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1-4 The present invention provides a cutting device for the production of magnesium alloy pipes, including a bracket 1. The bracket 1 is provided with a clamping component for clamping magnesium alloy pipes and a cutting component for cutting magnesium alloy pipes. A positioning component 4 for positioning the cutting component is provided below the clamping component. The bracket 1 includes two support frames 101 arranged at intervals on the left and right, and a connecting rod arranged at the front and rear below the two support frames 101. The clamping assembly includes a positioning plate 201 for fixing magnesium alloy pipes, which is respectively set on two support frames 101. The positioning plate 201 is provided with a fixing structure. The cutting assembly includes a crossbeam 301 horizontally set on the top of the two support frames 101, a cutting machine 302 set on the crossbeam 301, a left-right moving structure that drives the cutting machine 302 to move left and right, and a front-back moving structure that drives the cutting machine 302 to move back and forth. The positioning assembly 4 includes two positioning rods 401 set at the bottom of the positioning plate 201, and a positioning seat 402 is slidably set on the positioning rods 401.

[0022] The fixing structure includes a positioning screw 202 disposed in the positioning plate 201 and a sleeve 203 disposed on the positioning screw 202. Multiple rotatably connected connecting rods 204 are evenly spaced on the sleeve 203. An arc-shaped positioning plate 205 is rotatably connected to the top of the connecting rod 204. A positioning plate 206 is rotatably connected to the upper end of the positioning screw 202. A sliding groove 207 is provided on the positioning plate 206 through which the connecting rod 204 passes. Positioning slots are provided on both sides of the sliding groove 207 for connecting the arc-shaped positioning plate 205 and allowing it to slide on the positioning plate 206.

[0023] Positioning grooves are opened on both sides of the slide groove 207, and positioning blocks matching the positioning grooves are set below the arc-shaped positioning plate 205, so that the arc-shaped positioning plate 205 makes linear reciprocating motion on the positioning plate 206 under the action of the connecting rod 204. When positioning the magnesium alloy pipe, the rotation of the positioning screw 202 drives the sleeve 203 to move up and down on the positioning screw 202. When the sleeve 203 moves up and down, since the connecting rod 204 is rotatably connected to the arc-shaped positioning plate 205, and the arc-shaped positioning plate 205 cooperates with the slide groove 207 on the positioning plate 206 through the slider, the arc-shaped positioning plate 205 slides on the positioning plate 206, so that the arc-shaped positioning plate 205 contacts the inner wall of the magnesium alloy pipe and fixes it.

[0024] It should be noted that both the left and right positioning discs 201 are equipped with disc covers, and the fixing structure is set inside the positioning disc 201. The positioning screw 202 passes through the disc cover with an operating length. When processing magnesium alloy tubes, when dealing with long magnesium alloy tubes, as in this embodiment, the disc cover of one side of the positioning disc 201 can be removed, and the excess part of the magnesium alloy tube passes through the left positioning disc 201. At this time, the magnesium alloy tube is first positioned by the right positioning disc 201, and the positioning seat 402 below provides support. Then, a washer is added inside the left positioning disc 201 and placed on the outer wall of the magnesium alloy tube to provide support for the left side of the magnesium alloy tube. After cutting, the right magnesium alloy tube can be taken out by hoisting. Then, the washer is removed and the left magnesium alloy tube is moved to the right to cut the remaining magnesium alloy tube.

[0025] When dealing with magnesium alloy pipes of different sizes, the position of the sleeve 203 can be further adjusted by adjusting the number of rotations of the positioning screw 202, thereby fixing the magnesium alloy pipes of different sizes. The positioning screw 202 can be rotated manually or by a motor to fix the magnesium alloy pipes.

[0026] The left-right moving structure includes a first drive motor 303 mounted on the left support frame 101, a first threaded rod mounted inside the crossbeam 301 and passing through the left support frame 101 and connected to the output end of the first drive motor 303, and a moving part mounted on the first threaded rod.

[0027] The first drive motor 303 drives the first threaded rod to rotate, causing the moving part on the first threaded rod to move left and right, thereby driving the cutting machine 302 to move left and right. When the cutting machine 302 moves left and right, the signal receiving target on the cutting machine 302 receives the signal emitted by the signal transmitter 404 on the positioning seat 402 for positioning. After receiving the signal, the control module connected by electricity controls the first drive motor 303 to stop working, so that the cutting machine 302 is accurately positioned at the position to be cut on the magnesium alloy pipe.

[0028] The moving part includes a moving plate 304 connected to the first threaded rod and a vertical plate 305 disposed on the moving plate 304 for mounting a front-to-back moving structure. The front-to-back moving structure includes a fixed plate 306 disposed below the vertical plate 305. A telescopic cylinder is disposed on the fixed plate 306. The output end of the telescopic cylinder is connected to the cutting machine 302. A slide rail 307 for moving the vertical plate 305 left and right is disposed on the outer side wall of the crossbeam 301.

[0029] A telescopic cylinder is installed on the fixed plate 306, which drives the cutting machine 302 to move back and forth, enabling the cutting machine 302 to cut the magnesium alloy pipe completely. The fixed plate 306 is positioned below the vertical plate 305, and the vertical plate 305 drives the fixed plate 306 to move left and right. A slide rail 307 is installed on the side wall of the outer side of the crossbeam 301 for the left and right movement of the vertical plate 305, making the movement of the vertical plate 305 smoother and increasing the connection strength of the vertical plate 305, ensuring the stability when the vertical plate 305 drives the fixed plate 306 to move left and right, and when the cutting machine 302 on the fixed plate 306 moves back and forth.

[0030] On the positioning base 402, there are two arc-shaped positioning platforms 403 arranged at intervals left and right. A signal transmitter 404 is arranged between the two arc-shaped positioning platforms 403. On the cutting machine 302, there is a signal receiving target (not shown in the figure) matching the positioner. On the positioning rod 401, there is a positioning structure for positioning the positioning base 402. The signal receiving target and the first driving motor 303 are electrically connected to the same control module (not shown in the figure).

[0031] Two arc-shaped positioning platforms 403 are arranged on the positioning base 402. An opening is left in the middle position of the positioning base 402 to form a "mouth" shape. The two arc-shaped positioning platforms 403 are connected by connecting plates on the front and back sides. When the magnesium alloy pipe is cut, two magnesium alloy pipes are formed on the left and right sides. By arranging two arc-shaped positioning platforms 403 on the positioning base 402, support is provided for the two magnesium alloy pipes respectively, and arranging two arc-shaped positioning platforms 403 on the positioning base 402 can avoid the cutting machine 302 during the cutting of the magnesium alloy pipe and will not affect the cutting of the cutting machine 302.

[0032] The arc-shaped positioning platform 403 is made of high-density engineering plastic, which has the advantages of insulation, no spark generation, and good shock absorption, and can prevent friction ignition caused by direct contact between metals.

[0033] It should be noted that in this embodiment, an infrared signal transmitter 404 and an infrared signal receiving target are adopted. The infrared signal transmitter 404, the infrared signal receiving target, and the control module are all prior arts and will not be elaborated here.

[0034] The positioning structure includes two second threaded rods 405 respectively arranged inside the two positioning rods 401. The two sides of the positioning base 402 are respectively threadedly connected to the two second threaded rods 405. On the right support frame 101, there is a motor box equipped with a second driving motor 406. The output end of the second driving motor 406 is provided with a rotating rod 407. Two first bevel gears 408 are respectively arranged at both ends of the rotating rod 407. Second bevel gears meshing with the first bevel gears 408 are arranged on both of the two second threaded rods 405.

[0035] By driving the rotation of the rotating rod 407 by the second driving motor 406, the rotation of the two first bevel gears 408 is driven by the rotating rod 407. The first bevel gears 408 are meshed with the second bevel gears to drive the rotation of the second threaded rods 405, and further drive the positioning base 402 connected to the second threaded rods 405 to move left and right, so as to adjust the position of the positioning base 402. Arranging two second threaded rods 405 to drive the left and right movement of the positioning base 402 makes its movement more stable and more accurate during positioning.

[0036] In this embodiment, when cutting the magnesium alloy pipe, the right end of the pipe rests against the cover of the positioning disc 201 on the right side. The rotation of the positioning screw 202 drives the arc-shaped positioning plate 205 to fix the magnesium alloy pipe, thus fixing the position of the right end of the magnesium alloy pipe. The distance the positioning seat 402 moves is adjusted according to the number of rotations of the rotating rod 407 driven by the second drive motor 406, which can accurately position the required length of the magnesium alloy pipe. The signal transmitter 404 on the positioning seat 402 is aligned with the position to be cut according to the required length, and matched with the signal receiving target on the cutting machine 302. Then, the control module controls the first drive motor 303 to stop working, and the cutting machine 302 performs the cutting, realizing the accurate positioning and cutting of the magnesium alloy pipe.

[0037] In this embodiment, the cutting machine 302 adopts water jet cutting. Water jet cutting uses softened pure water or deionized water, and often mixes abrasive (such as garnet). Water jet cutting produces no high temperature or sparks, eliminating the possibility of magnesium alloy burning when heated. It ensures that the material's crystal structure remains unchanged during the cutting process, avoiding warping or performance degradation caused by thermal stress. It does not use toxic gases or liquids, and does not produce harmful fumes or vapors, meeting the requirements of green manufacturing. The kerf is narrow and the burrs are minimal.

[0038] Below the positioning component 4 is a collection trough for receiving magnesium alloy debris. Inside the collection trough is a funnel-shaped sedimentation tank 501 with indentations from both sides towards the center. Below the sedimentation tank 501 are multi-layer filter plates 502 with progressively smaller apertures from top to bottom. Below the filter screen is a wastewater collection tank 503. During the cutting of magnesium alloy pipes, water jet cutting is used, and abrasive particles are mixed in the water jet to ensure precise cutting. The collection trough collects the cutting water, abrasive particles, and aluminum alloy debris. The sedimentation tank 501 carries the abrasive particles and debris downwards to settle, where they are filtered by the multi-layer filter plates 502. The filter plates stratify the metal debris and abrasive residue according to particle size, facilitating subsequent processing and recycling.

[0039] The support frame 101 is equipped with reinforcing ribs to increase the connection strength of the various components. Reinforcing ribs are respectively installed below the crossbeam 301, below the first drive motor 303, and below the second drive motor 406 to increase the connection strength of the crossbeam 301, the first drive motor 303, and the second drive motor 406 and ensure the stability of the connection; reinforcing ribs are also installed on both sides of the support frame 101 to improve the strength of the support frame 101.

[0040] The cutting device for producing magnesium alloy pipes of the present invention positions the magnesium alloy pipes by setting positioning plates 201 on two support frames 101 respectively. After positioning is completed, the magnesium alloy pipes are fixed by a fixing structure, which facilitates subsequent cutting of the magnesium alloy pipes. The fixing structure can be adjusted according to the size of the magnesium alloy pipes, so it is suitable for fixing different types of magnesium alloy pipes and making the cutting process more convenient. The cutting device for magnesium alloy pipe production of the present invention first positions the required size of the magnesium alloy pipe to be cut by the positioning component 4 when cutting the fixed magnesium alloy pipe. Then, the left and right moving structure drives the cutting machine 302 to move left and right according to the position of the positioning component 4. After moving to the required position, cutting is performed. During cutting, the front and back moving structure drives the cutting machine 302 to move back and forth to complete the cutting of the magnesium alloy pipe. The positioning is more accurate and the use is more convenient.

[0041] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cutting device for producing magnesium alloy pipes, comprising a support (1), characterized in that: The bracket (1) is provided with a clamping assembly (2) for clamping magnesium alloy pipes and a cutting assembly (3) for cutting magnesium alloy pipes. A positioning assembly (4) for positioning the cutting assembly (3) is provided below the clamping assembly (2). The bracket (1) includes two support frames (101) spaced apart on the left and right, and a connecting rod (102) arranged in front and behind below the two support frames (101). The clamping assembly (2) includes a positioning plate (201) for fixing magnesium alloy pipes, which is respectively set on two support frames (101). The positioning plate (201) is provided with a fixing structure. The cutting assembly (3) includes a crossbeam (301) set horizontally on the top of the two support frames (101), a cutting machine (302) set on the crossbeam (301), a left-right moving structure that drives the cutting machine (302) to move left and right, and a front-back moving structure that drives the cutting machine (302) to move back and forth. The positioning assembly (4) includes two positioning rods (401) set in front and behind the positioning plate (201). A positioning seat (402) is slidably set on the positioning rod (401).

2. The cutting device for producing magnesium alloy pipes as described in claim 1, characterized in that: The fixing structure includes a positioning screw (202) disposed in the positioning plate (201) and a sleeve (203) disposed on the positioning screw (202). The sleeve (203) is provided with a plurality of rotatably connected connecting rods (204) evenly spaced. The top end of the connecting rod (204) is rotatably connected to an arc-shaped positioning plate (205). The upper end of the positioning screw (202) is rotatably connected to a positioning plate (206). The positioning plate (206) is provided with a sliding groove (207) through which the connecting rod (204) passes. The sliding groove (207) is provided with positioning slots (208) on both sides for connecting the arc-shaped positioning plate (205) and allowing it to slide on the positioning plate (206).

3. The cutting device for producing magnesium alloy pipes as described in claim 1, characterized in that: The left and right moving structure includes a first drive motor (303) mounted on the left support frame (101), a first threaded rod mounted inside the crossbeam (301) and passing through the left support frame (101) and connected to the output end of the first drive motor (303), and a moving part mounted on the first threaded rod.

4. The cutting device for producing magnesium alloy pipes as described in claim 3, characterized in that: The moving part includes a moving plate (304) connected to the first threaded rod and a vertical plate (305) on the moving plate (304) for mounting a front-back moving structure. The front-back moving structure includes a fixed plate (306) below the vertical plate (305). A telescopic cylinder is provided on the fixed plate (306). The output end of the telescopic cylinder is connected to the cutting machine (302). A slide rail (307) for moving the vertical plate (305) left and right is provided on the outer side wall of the crossbeam (301).

5. The cutting device for producing magnesium alloy pipes as described in claim 3, characterized in that: The positioning base (402) is provided with two arc-shaped positioning platforms (403) spaced apart on the left and right. A signal transmitter (404) is provided between the two arc-shaped positioning platforms (403). The cutting machine (302) is provided with a signal receiving target that matches the positioning device. The positioning rod (401) is provided with a positioning structure for positioning the positioning base (402). The signal receiving target is electrically connected to the first drive motor (303) with the same control module.

6. The cutting device for producing magnesium alloy pipes as described in claim 5, characterized in that: The positioning structure includes two second threaded rods (405) respectively disposed inside two positioning rods (401). The two sides of the positioning seat (402) are respectively threaded to the two second threaded rods (405). A motor box on the right support frame (101) is provided with a second drive motor (406). A rotating rod (407) is provided at the output end of the second drive motor (406). Two first helical gears (408) are respectively provided at both ends of the rotating rod (407). A second helical gear (409) that meshes with the first helical gear (408) is provided on each of the two second threaded rods (405).

7. The cutting device for producing magnesium alloy pipes as described in claim 1, characterized in that: Below the positioning component (4) is a collection trough (5) for receiving magnesium alloy scrap. Inside the collection trough is a funnel-shaped sedimentation tank (501) with two sides concave towards the center. Below the sedimentation tank (501) is a multi-layer filter plate (502) with pore sizes decreasing from top to bottom. Below the filter screen is a wastewater collection tank (503).

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