CN117102827A - Liquid collecting pipe processing technology - Google Patents
Liquid collecting pipe processing technology Download PDFInfo
- Publication number
- CN117102827A CN117102827A CN202311369748.4A CN202311369748A CN117102827A CN 117102827 A CN117102827 A CN 117102827A CN 202311369748 A CN202311369748 A CN 202311369748A CN 117102827 A CN117102827 A CN 117102827A
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- blank
- machining
- outlet pipe
- model
- liquid collecting
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- 239000007788 liquid Substances 0.000 title claims abstract description 37
- 238000005516 engineering process Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000003754 machining Methods 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 11
- 238000003801 milling Methods 0.000 claims abstract description 8
- 230000003746 surface roughness Effects 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention belongs to the technical field of non-positive displacement pumps, and relates to a liquid collecting pipe processing technology. The liquid collecting pipe comprises an airfoil-shaped flat pipe and an outlet pipe, and the processing technology of the liquid collecting pipe comprises the following steps: dividing the wing-shaped flat tube into an upper half model and a lower half model from the middle according to the design model of the wing-shaped flat tube; preparing a first bar and a second bar; milling a first bar stock into an L-shaped upper blank by imitating an upper half model, milling a second bar stock into an L-shaped lower blank by imitating a lower half model, and processing a lower process boss on the lower blank; an upper half inner cavity and a lower half inner cavity are respectively processed on the upper blank and the lower blank; butt welding the upper blank and the lower blank together; processing the shape of the upper half part of the wing-shaped flat tube; welding an outlet pipe; machining the shape and the threaded hole of the outlet pipe; and machining the shape of the lower half part of the wing-shaped flat tube to obtain a finished product of the liquid collecting tube. The liquid collecting pipe manufactured by the process can ensure the surface roughness of the inner cavity and improve the process performance of the product.
Description
Technical Field
The invention relates to a liquid collecting pipe processing technology, and belongs to the technical field of non-positive displacement pumps.
Background
The rotary jet pump is a low-flow high-lift pump. The liquid collecting pipe is arranged in a rotor cavity of the rotary jet pump, high-kinetic energy liquid in the rotor cavity enters the liquid collecting pipe from an inlet of the liquid collecting pipe, high-pressure liquid is finally discharged from an outlet, the kinetic energy of the liquid is converted into pressure energy to be output, and the design of a flow passage in the liquid collecting pipe, the dimensional accuracy and the smoothness of the inner surface are key factors for determining the efficiency of converting the kinetic energy into the pressure energy.
The collector tube comprises an airfoil-shaped flat tube and an outlet tube, the design of the airfoil-shaped flat tube can enable the flowing resistance to be minimum, the collector tube has a right-angle bending structure, the collector tube is generally manufactured by adopting a casting molding process at present, and the defects are that:
(1) Because the right-angle bending part of the liquid collecting pipe is easy to generate casting defects such as edges and corners and is not easy to find, vortex and backflow phenomena are easy to generate when high-speed liquid entering the liquid collecting pipe flows through the right-angle bending part;
(2) The inlet caliber of the liquid collecting pipe is between phi 5 and phi 22mm, and the casting is difficult and sand removal is difficult due to small caliber size, and at present, dangerous sand removal processes such as alkali explosion and the like are mostly adopted;
(3) Because the inner cavity of the liquid collecting pipe is narrow and small, the liquid collecting pipe cannot be polished, the roughness of the inner cavity of the casting cannot be mastered, and the performance of the pump set is unstable.
Disclosure of Invention
The present invention aims to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.
The technical scheme provided by the invention is as follows: the liquid collecting pipe processing technology comprises the following steps of:
s1, dividing the wing-shaped flat tube into an upper half model and a lower half model from the middle according to a design model of the wing-shaped flat tube; the upper half part model and the lower half part model are respectively provided with an upper half inner cavity and a lower half inner cavity;
s2, preparing a first bar and a second bar corresponding to the upper half model and the lower half model according to the outline sizes of the upper half model and the lower half model respectively;
s3, milling the first bar stock into an L-shaped upper blank by imitating the upper half model, milling the second bar stock into an L-shaped lower blank by imitating the lower half model on a machine tool of a machining center, and machining a lower process boss on the lower blank;
s4, processing the upper half inner cavity and the lower half inner cavity on the upper blank and the lower blank respectively;
s5, butt welding the upper blank and the lower blank together;
s6, machining the shape of the upper half part of the wing-shaped flat tube to obtain a half-formed part;
s7, preparing an outlet pipe, and welding the outlet pipe on the semi-formed part;
s8, machining the appearance of the outlet pipe, and machining a threaded hole at the end part of the outlet pipe;
s9, machining the shape of the lower half part of the wing-shaped flat tube to obtain a finished product of the liquid collecting tube.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the liquid collecting pipe manufactured by the liquid collecting pipe processing technology can ensure the surface roughness of the inner cavity, improve the processing performance of products, effectively reduce the loss of a pump set and improve the efficiency of the pump set compared with a precisely cast liquid collecting pipe.
On the basis of the technical scheme, the invention can be improved as follows.
Further, in step S4, pin holes are machined at both ends of the upper and lower blanks, and in step S5, the upper and lower blanks are fixed together by pins and then welded.
The upper blank and the lower blank are fixedly connected through the pin shaft after being combined together, so that the positioning precision is improved, no-clearance fit can be achieved between the upper blank and the lower blank, and the welding quality is guaranteed.
Further, in step S8, the profile of the outlet pipe is finished by clamping the lower process boss.
The adoption of the further scheme has the beneficial effects that in the step S3, the lower process boss is reserved, the appearance of the outlet pipe is finished after the lower process boss is clamped by the numerical control lathe, and the perpendicularity between the axis of the inner cavity of the wing-shaped flat pipe and the axis of the outlet pipe and the perpendicularity between the cylindrical surface of the outlet pipe and the upper end surface of the outlet pipe can be ensured.
Further, in step S8, the lower process boss is clamped by a chuck on a machine tool of a machining center, and a threaded hole in the upper portion of the outlet pipe is drilled and tapped.
Further, the lower process boss is clamped using a three jaw self-centering chuck.
Further, after the center line of the lower process boss is aligned by the surface drilling and the aligning and the center line of the outlet pipe are overlapped, the outlet pipe is drilled and tapped.
Further, in step S4, grooves are formed around the inner cavities of the upper and lower blanks.
Further, in step S4, the inner cavities of the upper and lower blanks are processed to have a surface roughness Ra of 1.6 μm or less.
Further, the cross sections of the first bar stock and the second bar stock are rectangular, circular or polygonal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a three-dimensional model of an airfoil flat tube of the present invention;
FIG. 2 is a schematic view of a structure of a first bar obtained by cutting the bar;
FIG. 3 is a schematic view of the structure of a second bar obtained by cutting the bar;
FIG. 4 is a schematic view of the structure of the upper blank;
FIG. 5 is a schematic view of the structure of the lower blank;
FIG. 6 is a schematic view of the structure of the upper blank with an internal cavity;
FIG. 7 is a schematic view of the structure of the cavity formed in the lower blank;
FIG. 8 is a schematic view of the structure of the upper and lower blanks during butt welding;
FIG. 9 is a schematic view of the structure of the half-formed part after the profile of the upper half of the airfoil flat tube is machined;
FIG. 10 is a schematic view of the structure of the outlet tube welded to the semi-formed part;
FIG. 11 is a schematic view of the outlet pipe after being contoured;
FIG. 12 is a schematic view of the structure after a threaded hole is machined in the outlet pipe;
FIG. 13 is a schematic view of the structure of a finished header;
in the figure, 1, an airfoil-shaped flat tube; 2. an outlet tube; 3. a first bar stock; 301. a blank is arranged on the upper blank; 302. an upper half inner cavity; 4. a second bar stock; 401. a blank is arranged; 402. a lower process boss; 403. a lower half inner cavity; 5. a semi-formed part; 6. a threaded hole; 7. a pin hole; 8. a pin shaft; 9. and (5) groove.
Detailed Description
The principles and features of the present invention are described below in connection with examples, which are set forth only to illustrate the present invention and not to limit the scope of the invention.
A process for processing a liquid collecting pipe, wherein the liquid collecting pipe comprises an airfoil-shaped flat pipe 1 and an outlet pipe 2, as shown in fig. 13, and the process for processing the liquid collecting pipe comprises the following steps:
s1, dividing the wing-shaped flat tube 1 into an upper half model and a lower half model from the middle according to a design model of the wing-shaped flat tube 1; the upper and lower mold halves have upper and lower inner cavities 302 and 403, respectively;
as shown in fig. 1, a three-dimensional model of the collector tube is first built by using three-dimensional software, and the airfoil flat tube 1 is divided into an upper half model and a lower half model from the middle in the three-dimensional model.
S2, preparing a first bar 3 and a second bar 4 corresponding to the upper half model and the lower half model according to the outline sizes of the upper half model and the lower half model respectively;
cutting the bar material by using a sawing machine to obtain a first bar material 3 and a second bar material 4; the dimensions of the first bar 3 and the second bar 4 are selected according to the dimensions of the liquid collecting pipe, in this embodiment, as shown in fig. 2 and 3, the first bar 3 is made of round steel with a diameter of phi 85mm and a length of 152mm, and the second bar 4 is made of round steel with a diameter of phi 100mm and a length of 175 mm.
S3, milling the first bar 3 into an L-shaped upper blank 301 according to the profile of the upper half model of the airfoil flat tube 1 on a machine tool of a machining center, milling the second bar 4 into an L-shaped lower blank 401 according to the profile of the lower half model of the airfoil flat tube 1, and machining a lower process boss 402 on the lower blank 401, as shown in fig. 4 and 5;
s4, as shown in fig. 6 and 7, an upper half inner cavity 302 and a lower half inner cavity 403 are respectively processed on the upper blank 301 and the lower blank 401, and the inner surface roughness of the upper half inner cavity 302 and the lower half inner cavity 403 is processed to Ra less than or equal to 1.6 mu m; simultaneously, a groove 9 is processed at a die clamping position of the upper blank 301 and the lower blank 401, the groove 9 is a welding groove 9, the groove 9 is in a V shape, the angle of the groove 9 is 45 degrees, the blunt edge length is 2-3mm, and pin holes 7 with phi 6mm are processed at two ends of the upper blank 301 and two ends of the lower blank 401; of course, the surface roughness of the upper half inner cavity 302 and the lower half inner cavity 403, the size of the groove 9 and the pin hole 7 may be other sizes, as long as the machining requirement and the performance requirement are met, which is within the scope of the present invention.
S5, as shown in FIG. 8, the upper blank 301 and the lower blank 401 are butt-welded together; the upper blank 301 and the lower blank 401 are fixed together by the pin 8 and then welded. After the upper blank 301 and the lower blank 401 are combined together, the upper blank 301 and the lower blank 401 are connected and fixed through the pin shaft 8, so that the positioning precision is improved, the upper blank 301 and the lower blank 401 can be in clearance-free fit, and the welding quality is ensured.
S6, as shown in FIG. 9, processing the shape of the upper half part of the airfoil flat tube 1 to obtain a half-formed piece 5;
s7, as shown in FIG. 10, preparing an outlet pipe 2, and welding the outlet pipe 2 on the semi-molded part 5;
s8, machining the appearance of the outlet pipe 2 as shown in FIG. 11; as shown in fig. 12, a threaded hole 6 is machined in the end of the outlet pipe 2;
the outer shape of the outlet pipe 2 is finished after the lower process boss 402 is clamped by a numerical control lathe, so that the perpendicularity between the axis of the inner cavity of the airfoil flat pipe 1 and the axis of the outlet pipe 2 and the perpendicularity between the cylindrical surface of the outlet pipe 2 and the upper end surface of the outlet pipe 2 can be ensured.
And clamping the lower process boss 402 by using a three-jaw self-centering chuck on a machine tool of a machining center, and drilling and tapping the outlet pipe 2 after aligning the center line of the lower process boss 402 to coincide with the center line of the outlet pipe 2 by a marking table.
S9, as shown in FIG. 13, machining the shape of the lower half part of the airfoil flat tube 1, and obtaining a finished product of the liquid collecting tube.
The liquid collecting pipe manufactured by the liquid collecting pipe processing technology can ensure the surface roughness of the inner cavity, improve the processing performance of products, effectively reduce the loss of a pump set and improve the efficiency of the pump set compared with a precisely cast liquid collecting pipe.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The liquid collecting pipe processing technology is characterized in that the liquid collecting pipe comprises an airfoil-shaped flat pipe (1) and an outlet pipe (2), and comprises the following steps:
s1, dividing the wing-shaped flat tube (1) into an upper half model and a lower half model from the middle according to a design model of the wing-shaped flat tube (1); the upper half model and the lower half model are respectively provided with an upper half inner cavity (302) and a lower half inner cavity (403);
s2, preparing a first bar (3) and a second bar (4) corresponding to the upper half model and the lower half model according to the outline sizes of the upper half model and the lower half model respectively;
s3, milling the first bar (3) into an L-shaped upper blank (301) according to the upper half model, milling the second bar (4) into an L-shaped lower blank (401) according to the lower half model on a machine tool of a machining center, and machining a lower process boss (402) on the lower blank (401);
s4, processing the upper half inner cavity (302) and the lower half inner cavity (403) on the upper blank (301) and the lower blank (401) respectively;
s5, butt welding the upper blank (301) and the lower blank (401) together;
s6, machining the shape of the upper half part of the wing-shaped flat tube (1) to obtain a half-formed piece (5);
s7, preparing an outlet pipe (2), and welding the outlet pipe (2) on the semi-formed piece (5);
s8, machining the appearance of the outlet pipe (2), and machining a threaded hole (6) at the end part of the outlet pipe (2);
s9, machining the shape of the lower half part of the wing-shaped flat tube (1) to obtain a liquid collecting tube finished product.
2. The header pipe processing process according to claim 1, characterized in that in step S4 pin holes (7) are processed at both ends of the upper blank (301) and both ends of the lower blank (401), and in step S5, the upper blank (301) and the lower blank (401) are fixed together by pin shafts (8) and then welded.
3. The header tube machining process according to claim 1, characterized in that in step S8 the profile of the outlet tube (2) is finished by clamping the lower process boss (402).
4. The header pipe machining process according to claim 1, characterized in that in step S8, the threaded hole (6) in the upper part of the outlet pipe (2) is drilled and tapped on the machining center' S machine tool by clamping the lower process boss (402) with a chuck.
5. The header tube process of claim 4, wherein the lower process boss (402) is clamped with a three-jaw self-centering chuck.
6. The header processing process of claim 5, wherein drilling and tapping the outlet pipe (2) is performed after the alignment of the center line of the lower process boss (402) and the center line of the outlet pipe (2) coincide.
7. The header pipe machining process according to claim 1, characterized in that in step S4, a groove (9) is machined at the joint of the upper blank (301) and the lower blank (401).
8. The header processing process according to claim 1, characterized in that in step S4, the upper half inner cavity (302) and the lower half inner cavity (403) are processed to have a surface roughness Ra of 1.6 μm or less.
9. The header tube processing process according to claim 1, characterized in that the cross section of the first bar (3) and the second bar (4) is rectangular, circular or polygonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311369748.4A CN117102827A (en) | 2023-10-23 | 2023-10-23 | Liquid collecting pipe processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311369748.4A CN117102827A (en) | 2023-10-23 | 2023-10-23 | Liquid collecting pipe processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117102827A true CN117102827A (en) | 2023-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311369748.4A Pending CN117102827A (en) | 2023-10-23 | 2023-10-23 | Liquid collecting pipe processing technology |
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2023
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