CN114273679B - Processing technology of pump shell - Google Patents
Processing technology of pump shell Download PDFInfo
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- CN114273679B CN114273679B CN202111445661.1A CN202111445661A CN114273679B CN 114273679 B CN114273679 B CN 114273679B CN 202111445661 A CN202111445661 A CN 202111445661A CN 114273679 B CN114273679 B CN 114273679B
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- pump
- pump shell
- outer end
- bosses
- processing
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- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 238000003754 machining Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000523 sample Substances 0.000 claims abstract description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229910001060 Gray iron Inorganic materials 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a processing technology of a pump shell, which comprises the following steps: a) Machining a shaft hole for fixing the impeller and a fastening disc; b) A plurality of bosses positioned on the fastening disc and the inner wall of the pump cavity are lightened, burrs at the edge of the inner wall of the pump cavity are removed, a probe is additionally arranged on processing equipment to measure the distance from the processing starting position to each boss in real time, and then the processing equipment is processed in a linkage way with a preset program; c) Processing a position which is positioned on the side surface of the pump shell and used for positioning the threaded hole; d) Fixing the pump shell on a lathe tool in a threaded fixing mode, and clamping the outer circle of the tool to process on the lathe; e) Fixing the pump shell on a lathe tool in a thread fixing mode, and machining internal threads of each boss; f) The pump shell is fixed on the lathe tool in a threaded fixing mode, the bottom of the tool is fixed on the bottom plate of the machining center, and the end face of the discharge hole is machined, so that the machining efficiency and the machining precision can be improved.
Description
Technical Field
The invention relates to the field of centrifugal pumps, in particular to a processing technology of a pump shell.
Background
The centrifugal pump is a water pump with the largest dosage and has wide application in the fields of water supply and drainage, agricultural engineering, solid particle liquid conveying engineering, petroleum and chemical industry, aerospace and navigation engineering, energy engineering, vehicle engineering and the like. Centrifugal pumps are various in variety and specification and various in structural form due to different application occasions, performance parameters, conveying media and use requirements. Centrifugal pumps typically include a pump housing having a pump chamber in which an impeller is disposed for rotation mounted on an impeller shaft, an inlet in the pump housing introducing fluid into the rotating impeller. Rotation of the impeller causes fluid to be ejected outwardly and toward the volute of the pump casing and eventually through an outlet formed in the pump casing. The pump casing thus provides a pressure vessel that has the dual function of collecting fluid discharged by the impeller and converting high kinetic energy at the impeller outlet into potential energy at the pump casing discharge. The main components affecting the working efficiency of the centrifugal pump, namely the centrifugal impeller and the centrifugal pump shell, but the processing technology of the centrifugal pump shell is not perfect.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the background art, the embodiment of the invention provides a processing technology of a pump shell, which can effectively solve the problems related to the background art.
The technical scheme is as follows:
A processing technology of a pump shell comprises the following steps: a) Machining a shaft hole for fixing the impeller and a fastening disc; b) A plurality of bosses positioned on the fastening disc and the inner wall of the pump cavity are lightened, burrs at the edge of the inner wall of the pump cavity are removed, a probe is additionally arranged on processing equipment to measure the distance from the processing starting position to each boss in real time, and then the processing equipment is processed in a linkage way with a preset program; c) Processing a position which is positioned on the side surface of the pump shell and used for positioning the threaded hole; d) Fixing the pump shell on a lathe tool in a threaded fixing mode, and clamping the outer circle of the tool to process on the lathe; e) Fixing the pump shell on a lathe tool in a thread fixing mode, and machining internal threads of each boss; f) The pump shell is fixed on a lathe tool in a threaded fixing mode, the bottom of the tool is fixed on a machining center bottom plate, and the end face of the discharge hole is machined.
In a preferred embodiment of the invention, the material of the pump housing is cast iron.
In a preferred embodiment of the invention, in step B), the tolerance of the machining start position is greater than 0.3 mm.
As a preferred mode of the present invention, in the step B), the number of bosses on the fastening disc is four.
As a preferred mode of the present invention, in step C), the screw hole is engaged with an M8 screw.
As a preferred form of the invention, in step F), a pressing plate is used to press the fastening disc of the pump casing.
The invention has the following beneficial effects:
When processing the inside of pump chamber, through installing the distance of probe real-time measurement processing initial position to each boss additional, because each boss evenly distributed is on the fastening disc for the equidistance of processing initial position to each boss, this kind of processing method can improve work piece blank face flatness, provides machining efficiency and precision.
Drawings
FIG. 1 is a flow chart of a processing technique of a pump shell provided by the invention;
FIG. 2 is a front view of a pump housing provided by the present invention;
FIG. 3 is a left side view of the pump housing provided by the present invention;
FIG. 4 is a right side view of the pump housing provided by the present invention;
FIG. 5a is a schematic view of a first reference plane setting according to the present invention;
FIG. 5b is a schematic view of a first machining surface configuration provided by the present invention;
FIG. 6a is a schematic diagram of a second reference plane setting according to the present invention;
FIG. 6b is a schematic view of a second machining surface configuration provided by the present invention;
FIG. 7a is a schematic view of a third reference plane setting provided by the present invention;
FIG. 7b is a schematic view of a third machining surface configuration provided by the present invention;
FIG. 8a is a schematic diagram of a fourth reference plane setting provided by the present invention;
FIG. 8b is a schematic view of a fourth machining surface configuration provided by the present invention;
FIG. 9a is a schematic view of a fifth reference plane setting provided by the present invention;
FIG. 9b is a schematic view of a sixth machined surface configuration provided by the present invention;
Fig. 10 is a schematic view of a sixth reference plane and a sixth machining plane set according to the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1, a processing technology of a pump shell comprises the following steps:
A) A shaft hole 2 for fixing the impeller and a fastening disc 3 are machined.
B) And the light-out is positioned on a plurality of bosses on the fastening disc 3 and the inner wall 5 of the pump cavity, burrs on the edge of the inner wall 5 of the pump cavity are removed, the distance from the processing starting position to each boss is measured in real time by adding probes into processing equipment, and then the processing equipment is processed in linkage with a preset program.
C) The locations on the side of the pump housing 1 for locating the threaded holes 6 are machined.
D) The pump shell 1 is fixed on a lathe tool in a threaded fixing mode, and the outer circle of the clamping tool is machined on the lathe.
E) The pump shell 1 is fixed on a lathe tool in a threaded fixing mode, and internal threads of each boss are machined.
F) The pump shell 1 is fixed on a lathe tool in a threaded fixing mode, the bottom of the tool is fixed on a machining center bottom plate, and the end face of the discharge hole 7 is machined.
The material of the pump housing 1 is cast iron.
In step B), the tolerance of the machining start position is greater than 0.3 mm.
In step B), the number of bosses on the fastening disc 3 is four.
In step C), the threaded hole 6 is screw-fitted with an M8 screw.
In step F), the fastening disc 3 of the pump housing 1 is pressed with a pressing plate.
Specifically, as shown in fig. 2, the pump casing structure processed by the processing technology provided by the implementation includes a pump casing 1, a discharge hole 7, a shaft hole 2 for fixing an impeller, a fastening disc 3 on the side surface of the pump casing 1, and a boss arranged on the fastening disc 3, the pump casing is in a volute shape as a whole, the left and right sides of the pump casing are provided with round-like openings, one of the round openings is used as a feed inlet, liquid enters the pump casing through the feed inlet, the other round opening is used as a shaft hole 2, the shaft hole is used for inserting and fixing a rotating shaft of the impeller, and the pump casing is further provided with an opening perpendicular to the directions of the feed inlet and the shaft hole 2, and the opening is the discharge hole 7.
Fig. 3 and 4 show the structures of the left and right sides of the pump casing, respectively, and the pump casing structure is described in view of fig. 3 and 4, wherein the boss 4A on the left side and the boss 4B on the right side of the pump casing are provided with four bosses 4A on the fastening disc 3 on the left side of the pump casing in fig. 3, and the feed inlet 8 is located on the side; in fig. 4, three bosses 4B are provided on the right side of the pump housing, and the shaft hole 2 is located on this side.
For most liquid conveying equipment, the cast iron is a good material for manufacturing pump shells, particularly gray cast iron, ball-milling cast iron and corrosion-resistant high-nickel cast iron can be selected, the gray cast iron has enough strength to resist the generated pressure, the spheroidal graphite cast iron has better comprehensive performance, the cast iron can be used as a substitute for cast steel in a medium pressure and temperature range, the corrosion-resistant high-nickel cast iron is selected as a pump body material in the application occasions that the gray cast iron and the spheroidal graphite cast iron can not reach enough corrosion resistance, the common corrosion-resistant high-nickel cast iron is austenitic cast iron, the nickel content of the austenitic cast iron is 15-20%, the austenitic cast iron can resist the corrosion caused by high speed, and the cast iron can be welded and repaired on site relatively easily.
In the process of machining the pump housing 1, as shown in fig. 5a and 5b, step a) is performed by using DMG MACHINING CENTER (dematrix machining center) first, setting the outer end surface of the fastening disc 3 as the first reference surface 11, setting the outer end surface and the inner wall of the shaft hole 2 as the first machining surface 12, and machining the first reference surface 11 and the reference circle.
As shown in fig. 6a and 6B, in step B), DMG MACHINING CENTER is used, the outer end face of the shaft hole 2 is set as a second reference surface 21, the outer end faces of the four bosses 4A on the left side of the pump casing 1 and the pump cavity inner wall 5 are set as second processing surfaces 22, the four bosses 4A on the left side of the pump casing 1 and the pump cavity inner wall 5 are respectively polished, the burrs on the edge of the pump cavity inner wall 5 are removed, a processing device is additionally provided with a probe to measure the distance from the processing starting position to each boss in real time, and then the processing is performed in linkage with a preset program, so that the processing precision can be effectively improved.
The processing equipment described in this embodiment is DMG MACHINING CENTER.
In this step, in order to improve the working efficiency, the tolerance may be enlarged to more than 0.3 mm, for example, 0.4mm, when the distance from the machining start position to each boss 4A is measured.
As shown in fig. 7a and 7B, in step C), DMG MACHINING CENTER is used, the outer end surfaces of the four bosses 4A on the left side of the pump casing 1 are set as the third reference surface 31, the outer end surfaces of the shaft hole 2, the inner wall of the shaft hole 2, the outer end surfaces of the three bosses 4B on the right side of the pump casing 1, and the inner portions of the three bosses 4B on the right side of the pump casing 1 are set as the third processing surfaces 32, and positions for positioning the screw holes 6 on the side of the pump casing 1 are processed.
As shown in fig. 8a and 8B, in step D), north Okuma CNC Lathe (large-size numerically controlled lathe) is used, the outer end face of the shaft hole 2 and the outer end faces of the three bosses 4B on the right side of the pump casing 1 are set as fourth reference faces 41, the outer end faces of the four bosses 4A on the left side of the pump casing 1 and the other pump chamber parts except the pump chamber inner wall 5 in step B) are set as fourth machining faces 42, the pump casing 1 is fixed on a lathe tool by three M8 screws, and the outer circle of the clamping tool is machined on the lathe.
As shown in fig. 9a and 9B, in step E), DMG MACHINING CENTER is used, the outer end face of the shaft hole 2 and the outer end faces of the three bosses 4B on the right side of the pump case 1 are set as a fifth reference face 51, the inner walls of the four bosses 4A on the left side of the pump case 1 are set as a fifth working face 52, and the pump case 1 is fixed to a lathe tool by a screw-fixing method, and female screws of the respective bosses 4A are machined.
As shown in fig. 10, in step F), DMG MACHINING CENTER is used, the outer end face of the shaft hole 2 and the outer end faces of the three bosses 4B on the right side of the pump casing 1 are set as sixth reference faces 61, the outer end face of the discharge port 7 is set as sixth processing faces 62, the workpiece is pressed by a pressing plate, the pump casing 1 is fixed on a lathe tool by using an M8 screw, the tool bottom is fixed on a machining center bottom plate, and the outer end face of the discharge port 7 is machined.
It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
The foregoing embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same according to the present invention, not to limit the scope of the present invention. All changes and modifications that come within the meaning and range of equivalency of the invention are to be embraced within their scope.
In the figures mentioned above:
A pump shell-1;
Shaft hole-2;
a fastening disc-3;
A boss-4A on the left side of the pump shell;
A boss-4B on the right side of the pump shell;
pump cavity inner wall-5;
a threaded hole-6;
A discharge hole-7;
A feed inlet-8;
A first reference plane-11;
a first processed surface-12;
A second reference surface-21;
a second processed surface-22;
A third reference surface-31;
A third machined surface-32;
a fourth reference surface-41;
fourth processed surface-42;
A fifth reference plane-51;
fifth machined surface-52;
a sixth datum plane-61;
sixth machined surface-62.
Claims (6)
1. The processing technology of the pump shell is characterized by comprising the following steps of:
a) Machining a shaft hole for fixing the impeller and a fastening disc;
B) A plurality of bosses positioned on the fastening disc and the inner wall of the pump cavity are lightened, burrs at the edge of the inner wall of the pump cavity are removed, a probe is additionally arranged on processing equipment to measure the distance from the processing starting position to each boss in real time, and then the processing equipment is processed in a linkage way with a preset program;
c) Processing a position which is positioned on the side surface of the pump shell and used for positioning the threaded hole;
d) Fixing the pump shell on a lathe tool in a threaded fixing mode, and clamping the outer circle of the tool to process on the lathe;
E) Fixing the pump shell on a lathe tool in a thread fixing mode, and machining internal threads of each boss;
f) The pump shell is fixed on a lathe tool in a threaded fixing mode, the bottom of the tool is fixed on a machining center bottom plate, and the end face of a discharge hole is machined;
Step a) further comprises: setting the outer end surface of the fastening disc as a first reference surface, setting the outer end surface and the inner wall of the shaft hole as first processing surfaces, and processing the first reference surface and the reference circle;
step B) further comprises: setting the outer end face of the shaft hole as a second reference surface, setting the outer end faces of the four bosses on the left side of the pump shell and the inner wall of the pump cavity as second processing surfaces, and respectively shining out the four bosses on the left side of the pump shell and the inner wall of the pump cavity to remove burrs at the edge of the inner wall of the pump cavity;
Step C) further comprises: setting the outer end surfaces of the four bosses on the left side of the pump shell as a third reference surface, setting the outer end surfaces of the shaft hole, the inner wall of the shaft hole, the outer end surfaces of the three bosses on the right side of the pump shell and the inner parts of the three bosses on the right side of the pump shell as a third processing surface, and processing the positions of the side surfaces of the pump shell for positioning the threaded holes;
Step D) further comprises: setting the outer end surfaces of the shaft hole and the outer end surfaces of the three bosses on the right side of the pump shell as a fourth reference surface, setting the outer end surfaces of the four bosses on the left side of the pump shell and other pump cavity parts except the inner wall of the pump cavity in the step B) as a fourth processing surface, fixing the pump shell on a lathe tool by using three M8 screws, and clamping the outer circle of the tool to process on the lathe;
Step E) further comprises: setting the outer end surfaces of the shaft hole and the outer end surfaces of the three bosses on the right side of the pump shell as a fifth reference surface, setting the inner walls of the four bosses on the left side of the pump shell as a fifth processing surface, fixing the pump shell on a lathe tool in a thread fixing mode, and processing internal threads of all bosses;
Step F) further comprises: the outer end face of the shaft hole and the outer end faces of the three bosses on the right side of the pump shell are set as sixth reference surfaces, the outer end face of the discharge port is set as a sixth machining surface, a pressing plate is used for pressing a workpiece, the pump shell is fixed on a lathe tool by using an M8 screw, the bottom of the tool is fixed on a machining center bottom plate, and the outer end face of the discharge port is machined.
2. A process for manufacturing a pump housing according to claim 1, wherein: the pump shell is made of cast iron.
3. A process for manufacturing a pump housing according to claim 1, wherein: in step B), the tolerance of the machining start position is greater than 0.3 mm.
4. A process for manufacturing a pump housing according to claim 1, wherein: in the step B), the number of the bosses on the fastening disc is four.
5. A process for manufacturing a pump housing according to claim 1, wherein: in step C), the threaded hole is engaged with an M8 screw.
6. A process for manufacturing a pump housing according to claim 1, wherein: in step F), the fastening disc of the pump housing is pressed using a pressing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445661.1A CN114273679B (en) | 2021-11-30 | 2021-11-30 | Processing technology of pump shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445661.1A CN114273679B (en) | 2021-11-30 | 2021-11-30 | Processing technology of pump shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114273679A CN114273679A (en) | 2022-04-05 |
| CN114273679B true CN114273679B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111445661.1A Active CN114273679B (en) | 2021-11-30 | 2021-11-30 | Processing technology of pump shell |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190726368A (en) * | 1907-11-28 | 1908-11-30 | James Thomas Rossiter | Improvements in or relating to Centrifugal Pumps. |
| CN2837567Y (en) * | 2005-06-09 | 2006-11-15 | 山西临龙泵业有限公司 | Impurity pump body |
| CN106837507A (en) * | 2017-01-17 | 2017-06-13 | 江苏多为泵业股份有限公司 | A kind of internal combustion engine cooling water pump and its production technology |
| CN206967115U (en) * | 2017-07-27 | 2018-02-06 | 安徽金力泵业科技有限公司 | A kind of automobile water pump housing outer face clamp for machining |
| CN111140541A (en) * | 2019-12-31 | 2020-05-12 | 昆山匠联精密组件有限公司 | Automobile water pump shell and production method thereof |
| CN212762577U (en) * | 2020-08-18 | 2021-03-23 | 无锡祥升金属科技有限公司 | Deburring device for water pump shell |
-
2021
- 2021-11-30 CN CN202111445661.1A patent/CN114273679B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190726368A (en) * | 1907-11-28 | 1908-11-30 | James Thomas Rossiter | Improvements in or relating to Centrifugal Pumps. |
| CN2837567Y (en) * | 2005-06-09 | 2006-11-15 | 山西临龙泵业有限公司 | Impurity pump body |
| CN106837507A (en) * | 2017-01-17 | 2017-06-13 | 江苏多为泵业股份有限公司 | A kind of internal combustion engine cooling water pump and its production technology |
| CN206967115U (en) * | 2017-07-27 | 2018-02-06 | 安徽金力泵业科技有限公司 | A kind of automobile water pump housing outer face clamp for machining |
| CN111140541A (en) * | 2019-12-31 | 2020-05-12 | 昆山匠联精密组件有限公司 | Automobile water pump shell and production method thereof |
| CN212762577U (en) * | 2020-08-18 | 2021-03-23 | 无锡祥升金属科技有限公司 | Deburring device for water pump shell |
Non-Patent Citations (1)
| Title |
|---|
| 李文斌，王宗彦，闫献国等.现代制造系统.华中科技大学出版社,2016,(2016年9月第1版),第71-73页. * |
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| CN114273679A (en) | 2022-04-05 |
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