CN100581719C - Processing technique of roots pump fan blade - Google Patents
Processing technique of roots pump fan blade Download PDFInfo
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- CN100581719C CN100581719C CN200810025528A CN200810025528A CN100581719C CN 100581719 C CN100581719 C CN 100581719C CN 200810025528 A CN200810025528 A CN 200810025528A CN 200810025528 A CN200810025528 A CN 200810025528A CN 100581719 C CN100581719 C CN 100581719C
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- fan blade
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Abstract
The invention relates to a processing technology of Roots pump fan blade, comprising the following steps: testing roughcast, milling the upper and lower big surfaces of a fan blade roughcast, grinding a big surface of a fan blade roughcast as a base level, using the big ground surfaces as a base level to lathe a main shaft hole and a lightening hole of the fan blade, grinding the left and right end faces of the fan blade roughcast, planing a keyway of the fan blade roughcast, planing the shape of the fan blade roughly, making the main shaft and pressing the fan blade main shaft into the main shaft hole, planing the external circle of the upper and lower surfaces of the fan blade and the left and right ends roughly, grinding the upper and lower external circles of the fan blade, the left and right end faces and every external circle, and planing the external circle surface of the fan blade and the left and right end faces well. The processing technology has the advantages of high size precision and shape precision of the fan blade, good geometric symmetry, no minor problems such as non-uniform clearance and small compression ratio generated in meshingof the fan blade.
Description
Technical field
The present invention relates to a kind of processing technology of fan blade of lobe pump, belong to the Machining Technology field.
Background technology
Roots-type vavuum pump (abbreviation lobe pump) be a kind of do not have in the rotary positive-displacement vavuum pump of compression, utilize two figure of eight rotors (being fan blade) in pump case, to rotate and produce air-breathing and scavenging action.Fan blade is the vital part of this pump, gap between fan blade and the pump chamber is that the gap between 0.12～0.15mm, fan blade and the fan blade also has only 0.15～0.2mm, the gap is big can have influence on the compression ratio of vavuum pump, the gap is little then pump can generate heat at work and kill, this fan blade that just requires to process not only has high dimension precision and form accuracy, but also must have good geometrical symmetry.
Originally processing fan blade profile also is to carry out on the planer of repacking, but the driving of workbench and cutter head is to use stepper motor, because Stepping Motor Control is open loop control, start the too high or excessive phenomenon of losing step or stall that is prone to of load of frequency, the too high phenomenon that is prone to overshoot of rotating speed when stopping, these all influence the machining accuracy and the symmetry of fan blade, so at present there is dimensional accuracy in the fan blade of producing and problems such as form accuracy is lower, geometrical symmetry difference, and always there are problems such as gap inequality, compression ratio be less than normal in fan blade when engagement.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of fan blade that makes processing to satisfy dimensional accuracy and form accuracy is higher, the geometrical symmetry processing technology of roots pump fan blade preferably, avoid problems such as fan blade gap inequality, compression ratio of problem when engagement be less than normal.
According to technical scheme provided by the invention, the processing technology of described roots pump fan blade comprises following steps:
A, fan blade inspection of blank operation promptly check blank whether to have casting flaw, and whether appearance and size meets the requirements, and whether allowance is arranged on each machined surface;
B, mill up and down two surperficial operations of blank, promptly on the blank that is up to the standards, mill out two surfaces up and down;
C, polish upper surface or lower surface in the blank after step b processing, and with this upper surface that polishes or lower surface as datum level;
D, the upper surface that polishes with step c on blank or lower surface are done benchmark, process fan blade spindle hole and lightening core;
E, the upper surface or the lower surface that polish with step c on the blank of steps d processing are done benchmark, polish the left and right sides both ends of the surface of blank, and control both ends of the surface parallelism error is less than or equal to 0.02mm;
F, in the spindle hole of the blank of step e processing, process keyway;
G, the blank force plane that step f is processed go out the fan blade profile;
H, according to manufactured fan blade blank spindle hole size, magnitude of interference match grinding main shaft by 0.02～0.03mm, brushing lubricating oil on main shaft, repair the aperture burr of the spindle hole of the blank that removes step f processing, with the end face location, the fan blade blank left and right sides of step e processing, the main shaft of brushing lubricating oil is pressed in the spindle hole of fan blade blank of step g processing;
I, the left and right sides both ends of the surface and two surfaces up and down of withstanding the fan blade blank of step h processing with two groups of push pin device respectively, rough turn cylindrical and the left and right sides both ends of the surface that go out two surfaces up and down of fan blade behind rough turn the finishing, remove two groups of push pin device;
J, to the fan blade blank polishing fan blade of step h processing cylindrical, left and right sides end face and each grade of main shaft cylindrical on two surfaces up and down;
K, utilize the adjustable cast iron planes anchor clamps,, obtain the finished product of roots pump fan blade the fan blade blank of step h processing adjustable cast iron planes fan blade cylindrical and left and right sides end face up and down on the numerical control planer.
The fan blade of producing by processing technology of the present invention has high dimension precision and form accuracy, and geometrical symmetry is better, has avoided problems such as fan blade gap inequality, compression ratio of problem when engagement be less than normal.
The specific embodiment
Realize that the workbench of processing technology of the present invention and the driving of cutter head select servomotor for use, and adopt Siemens 802C control system.
The processing technology of roots pump fan blade of the present invention comprises following steps:
A, fan blade inspection of blank operation promptly check blank whether to have casting flaws such as pore, shrinkage cavity, burning into sand, tissue looseness, and whether appearance and size meets the requirements, and whether allowance is arranged on each machined surface, and the main measurer of this step is 0～150 slide calliper rule and 2M tape measure;
B, mill up and down two surperficial operations of blank, promptly on the blank that is up to the standards, mill out two surfaces up and down; The one, in order to reduce the processing capacity of numerical control planer; The 2nd, in order to process datum level, for the operation of back is got ready, this step measurer is selected 0～150 slide calliper rule for use;
C, the upper surface or the lower surface that polish step b processing back blank are done datum level; In this procedure arrangement mill processing, mainly be in order to prepare a smart benchmark to next procedure.Because next we will utilize vehicle clamper car fan blade spindle hole and lightening core, if datum level fineness is bad, can have influence on the dimensional accuracy and the form accuracy of spindle hole, and then the control of the magnitude of interference in the road pressure fan blade main shaft operation after the influence, measurer is selected 0～150 slide calliper rule for use;
D, the upper surface that polishes with step c on blank or lower surface are done benchmark, and car goes out fan blade spindle hole and lightening core; Car fan blade spindle hole is to press main shaft usefulness for the back, and there are dimensional requirement (φ 35.7H7, φ 36H7) and fineness requirement in this hole; The car lightening core is as the term suggests one be in order to alleviate the weight of part; The 2nd, in order to solve the size and dimension error of casting aspect, to reduce back dynamic balancing error, the main measurer of this step is 0～150 slide calliper rule, feeler gauge etc.;
E, the upper surface or the lower surface that polish with step c on the blank of steps d processing are done benchmark, polish the left and right sides both ends of the surface of blank, and control both ends of the surface parallelism error is less than or equal to 0.02mm; Grinding fan blade both ends of the surface operation is to prepare smart benchmark in order to dig keyway to the back with pressure fan blade main shaft, requires the both ends of the surface parallelism error to be not more than 0.02mm, and this step measurer is selected instruments such as 0～300 slide calliper rule and dial gauge for use;
F, in the spindle hole of the blank of step e processing, dig keyway; Fan blade needs rotation at a high speed in the work of lobe pump, will transmit moment of torsion between main shaft and the fan blade, and according to company's existing equipment, we have arranged plane keyway operation, and this step measurer is selected instruments such as 0～150 slide calliper rule and keyway feeler gauge for use;
G, the blank force plane that step f is processed go out the fan blade profile; Arranging the force plane operation is to consider the problem of allowance and clamping force, also in order to solve problem such as heating and stress deformation in the process, and the minimizing allowance for finish, this step measurer is selected instruments such as 0～150 slide calliper rule, micrometric depth gauge, dial gauge, R control gauge for use;
H, according to manufactured fan blade blank spindle hole size, magnitude of interference match grinding main shaft by 0.02～0.03mm, brushing lubricating oil on main shaft, repair the aperture burr of the spindle hole of the blank that removes step f processing, end face location, the fan blade blank left and right sides with step e processing, the main shaft of brushing lubricating oil is pressed on the 200T hydraulic press in the spindle hole of fan blade blank of step g processing, this step measurer is selected instruments such as internal diameter scale and micrometer for use;
I, the left and right sides both ends of the surface and two surfaces up and down of withstanding the fan blade blank of step h processing with two groups of push pin device respectively, rough turn cylindrical and the left and right sides both ends of the surface that go out two surfaces up and down of fan blade behind rough turn the finishing, remove two groups of push pin device; The car fan blade is the cylindrical and the both ends of the surface on two surfaces up and down; Can control fan blade up and down the cylindrical on two surfaces and end face the beating of spindle axis line reduced the grinding allowance of later process, this step measurer is selected instruments such as 0～300 slide calliper rule and dial gauge for use;
J, to the fan blade blank polishing fan blade of step h processing cylindrical, left and right sides end face and each grade of main shaft cylindrical up and down; Fan blade is cylindrical, left and right sides both ends of the surface and the grinding in same procedure of main shaft cylindrical on two surfaces up and down, just can guarantee the fan blade cylindrical and left and right sides both ends of the surface the beating within the margin of tolerance on two surfaces up and down to the spindle axis line, thereby satisfy the fit-up gap requirement of lobe pump, guarantee the compression ratio of lobe pump, this step measurer is selected micrometer for use;
K, utilize the adjustable cast iron planes anchor clamps,, obtain the finished product of roots pump fan blade the fan blade blank of the step h processing adjustable cast iron planes fan blade cylindrical and the left and right sides end face on two surfaces up and down on the numerical control planer.Adjustable cast iron planes fan blade profile is arranged in machined carries out at last, this is also adjusting through after the repeatedly practice demonstration, we are originally this procedure are placed on the mill first being processed, find repeatedly after the assembling that there is uneven phenomenon in the gap between fan blade and pump case, fan blade and the fan blade, maximum and minimum clearance will differ 0.05～0.1mm, and specification requirement is≤and 0.05mm.We test to fan blade, find that the fan blade profile is overproof to beating of axial line, have found out reason by analysis: because procedure arrangement is unreasonable, the benchmark after the benchmark when causing the fan blade sharp processing is processed with mill is not same benchmark.This step measurer is selected 0～150 slide calliper rule, micrometric depth gauge, dial gauge and R control gauge etc. for use.
To do dynamic balancing on dynamic balancing machine through the fan blade that above-mentioned steps makes detects.Because lobe pump rotating speed when work is higher, can reach 2880 rev/mins, the gap between fan blade and fan blade, fan blade and the pump case is again little, so require dynamic balancing error≤3 grams, why arranged the dynamic balancing operation, so just can guarantee that vavuum pump the time can not kill in work.
Claims (1)
1, a kind of processing technology of roots pump fan blade is characterized in that this technology comprises following steps:
A, fan blade inspection of blank operation: whether the check blank exists casting flaw, and whether appearance and size meets the requirements, and whether allowance is arranged on each machined surface;
B, mill up and down two surperficial operations of blank: on the blank that is up to the standards, mill out two surfaces up and down;
C, polish upper surface or lower surface on the blank after the step b processing, and with this upper surface or lower surface as datum level;
D, do benchmark, process the spindle hole and the lightening core of fan blade blank with the upper surface or the lower surface that polish with step c on the blank;
E, the upper surface or the lower surface that polish with step c on the blank of steps d processing are done benchmark, polish the left and right sides both ends of the surface of blank, and control left and right sides both ends of the surface parallelism error is less than or equal to 0.02mm;
F, in the spindle hole of the fan blade blank of step e processing, dig keyway;
G, the blank force plane that step f is processed go out the fan blade profile;
H, according to manufactured fan blade blank spindle hole size, magnitude of interference match grinding main shaft by 0.02～0.03mm, brushing lubricating oil on main shaft, repair the aperture burr of the spindle hole of the fan blade blank that removes step f processing, with the both ends of the surface location, the fan blade blank left and right sides of step e processing, the main shaft of brushing lubricating oil is pressed in the spindle hole of fan blade blank of step g processing;
I, the left and right sides both ends of the surface and two surfaces up and down of withstanding the fan blade blank of step h processing with two groups of push pin device respectively, rough turn cylindrical and the left and right sides both ends of the surface that go out two surfaces up and down of fan blade behind rough turn the finishing, remove two groups of push pin device;
J, to the fan blade blank polishing fan blade of step I processing cylindrical, left and right sides both ends of the surface and each grade of main shaft cylindrical on two surfaces up and down;
K, utilize the adjustable cast iron planes anchor clamps,, obtain the finished product of roots pump fan blade the fan blade blank of the step j processing adjustable cast iron planes fan blade cylindrical and the left and right sides both ends of the surface on two surfaces up and down on the numerical control planer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810025528A CN100581719C (en) | 2008-04-29 | 2008-04-29 | Processing technique of roots pump fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810025528A CN100581719C (en) | 2008-04-29 | 2008-04-29 | Processing technique of roots pump fan blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101264568A CN101264568A (en) | 2008-09-17 |
| CN100581719C true CN100581719C (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810025528A Expired - Fee Related CN100581719C (en) | 2008-04-29 | 2008-04-29 | Processing technique of roots pump fan blade |
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| CN (1) | CN100581719C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102658459B (en) * | 2012-05-18 | 2014-05-21 | 重庆江增船舶重工有限公司 | Manufacturing method of blade for centrifugal aeration blower diffuser and positioning tool for same |
| CN104759831A (en) * | 2014-01-04 | 2015-07-08 | 临安创投机械有限公司 | Machining technology for blades in liquid pump for pumping viscous fluid |
| CN105081710B (en) * | 2015-07-30 | 2017-05-03 | 南通中能机械制造有限公司 | Production technology for motor aluminum fan blade |
| CN109158835A (en) * | 2018-09-12 | 2019-01-08 | 福建成达鼓风机有限公司 | The impeller production process of roots blower |
| CN111571153A (en) * | 2020-05-29 | 2020-08-25 | 重庆水轮机厂有限责任公司 | Method for machining blade profile of Kaplan turbine blade |
-
2008
- 2008-04-29 CN CN200810025528A patent/CN100581719C/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| 罗茨鼓风机叶轮的数控刨削加工方法. 肖辉进.风机技术，第1期. 2003 |
| 罗茨鼓风机叶轮的数控刨削加工方法. 肖辉进.风机技术，第1期. 2003 * |
| 龙门刨床的数控改造与罗茨泵叶轮的加工. 康宝江，赵玉刚.制造技术与机床，第12期. 2007 |
| 龙门刨床的数控改造与罗茨泵叶轮的加工. 康宝江，赵玉刚.制造技术与机床，第12期. 2007 * |
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| CN101264568A (en) | 2008-09-17 |
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Assignee: Wuxi Sifang Barrel Making Co., Ltd. Assignor: Wuxi City Sifang Vacuum Equipment Co., Ltd. Contract record no.: 2010320000475 Denomination of invention: Processing technique of roots pump fan blade Granted publication date: 20100120 License type: Exclusive License Open date: 20080917 Record date: 20100427 |
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Granted publication date: 20100120 Termination date: 20170429 |
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