CN108274190B - Method for machining crankshaft of compressor - Google Patents
Method for machining crankshaft of compressor Download PDFInfo
- Publication number
- CN108274190B CN108274190B CN201711400507.6A CN201711400507A CN108274190B CN 108274190 B CN108274190 B CN 108274190B CN 201711400507 A CN201711400507 A CN 201711400507A CN 108274190 B CN108274190 B CN 108274190B
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- Prior art keywords
- grinding
- shaft
- main shaft
- natural aging
- aging treatment
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- 238000003754 machining Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000032683 aging Effects 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 15
- 238000005266 casting Methods 0.000 claims description 10
- 229910052582 BN Inorganic materials 0.000 claims description 5
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Images
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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0094—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 crankshaft
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a method for processing a compressor crankshaft, which comprises the following steps: s1: carrying out natural aging treatment for the first time; s2: rough machining of a blank; s3: performing natural aging treatment for the second time; s4: finely grinding the main shaft and the auxiliary shaft; s5: finely grinding the eccentric shaft and the thrust surface; s6: deburring and phosphorizing. The invention reduces the processing amount of fine grinding and improves the strength of the tool withdrawal groove position of the main shaft by using a high-precision rough machining process and the control of the depth of the tool withdrawal groove of the main shaft, and then uses the main shaft after the fine grinding as a positioning reference for clamping, so that the auxiliary shaft, the eccentric shaft part and the rotating shaft of the grinding machine have good coaxiality, the size and the tolerance precision of the produced product are higher, particularly the relative form and position tolerance precision of the eccentric shaft, the main shaft and the auxiliary shaft, thereby reducing the reject ratio of the product and improving the CPK value produced by the crankshaft finish machining. In addition, compared with the prior art, the invention omits the process of roughly grinding the main shaft and the auxiliary shaft, and reduces the production cost on the premise of equal yield.
Description
Technical Field
The invention belongs to a machining method, and particularly relates to a machining method of a compressor crankshaft.
Background
At present, the finish machining method of the crankshaft of the compressor generally comprises the following steps: roughly machining a crankshaft casting blank; centerless rough grinding of the main shaft and the auxiliary shaft; finely grinding the eccentric shaft and the thrust surface; the centerless grinding fine grinding main shaft and the auxiliary shaft; removing burrs; and (4) phosphorizing. However, in the processes, each device is generally processed in one process, a plurality of professional technicians are required to operate the devices, the cost of the input devices and the personnel is high, the devices are required to be clamped and positioned for many times, and the circulation time between the processes is long. In addition, when the main shaft and the auxiliary shaft are roughly ground in the centerless grinding in the second process, the taper of the main shaft is easily overlarge in the grinding process due to the long length of the main shaft, and the appearance size of the eccentric shaft is easily poor in the eccentric shaft grinding process in the condition. When the eccentric shaft is ground, the rough grinding main shaft is used as a reference, and the main bearing and the auxiliary bearing are ground after the eccentric shaft is ground, so that unstable geometric tolerance of the eccentric shaft, such as jumping, coaxiality and the like, is easy to occur.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for machining a compressor crankshaft, which is low in machining cost and high in machining precision.
The technical scheme adopted for solving the technical problems is as follows: a method for processing a crankshaft of a compressor comprises the following steps:
s1, first natural aging treatment: performing primary natural aging treatment on the crankshaft casting blank;
s2, rough machining of a blank: roughly machining the crankshaft casting blank subjected to the first natural aging treatment, keeping machining allowance of 0.05-0.1 mm in rough machining, and strictly controlling the depth dimension of a main shaft tool withdrawal groove;
s3, second natural aging treatment: performing secondary natural aging treatment on the rough machined part obtained in the step S2;
s4, fine grinding main shaft and auxiliary shaft: performing fine grinding on the main shaft and the auxiliary shaft of the rough machined part obtained in the step S3 by using a centerless grinder;
s5, fine grinding eccentric shaft and thrust surface: taking the main shaft after the accurate grinding processing as a positioning reference for clamping, performing accurate grinding processing on the eccentric shaft of the rough machining piece by using a grinding wheel after the clamping is finished, and then performing interpolation grinding and shape modification processing on the thrust surface of the rough machining piece;
s6, deburring and phosphorizing: the finished workpiece obtained in step S5 is subjected to deburring treatment and surface phosphating treatment by a deburring machine and a phosphating machine, respectively.
Further, the time of the first natural aging treatment in the step S1 is 55 to 70 days.
Further, the time of the second natural aging treatment in the step S3 is 42 to 55 days.
Further, before the second natural aging treatment, the rough machined part needs to be subjected to rust prevention treatment.
Further, the grinding wheel is a cubic boron nitride grinding wheel.
Has the advantages that: the invention reduces the processing amount of fine grinding and improves the strength of the tool withdrawal groove position of the main shaft by using a high-precision rough machining process and the control of the depth of the tool withdrawal groove of the main shaft, and then uses the main shaft after the fine grinding as a positioning reference for clamping, so that the auxiliary shaft, the eccentric shaft part and the rotating shaft of the grinding machine have good coaxiality, the size and the tolerance precision of the produced product are higher, particularly the relative form and position tolerance precision of the eccentric shaft, the main shaft and the auxiliary shaft, thereby reducing the reject ratio of the product and improving the CPK value produced by the crankshaft finish machining. In addition, compared with the prior art, the invention omits the procedure of roughly grinding the main shaft and the auxiliary shaft, reduces the investment of corresponding equipment and operators, reduces the production cost on the premise of equal yield, saves the floor area of a production workshop and improves the manageability and efficiency of a production site.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a flow chart of a method of the present invention;
fig. 2 is a schematic view of a compressor crankshaft.
Detailed Description
Referring to fig. 1 to 2, the present invention is a method for processing a crankshaft of a compressor, which includes the steps of:
s1, first natural aging treatment: performing primary natural aging treatment on the crankshaft casting blank;
s2, rough machining of a blank: roughly machining the crankshaft casting blank subjected to the first natural aging treatment, keeping machining allowance of 0.05-0.1 mm in rough machining, and strictly controlling the depth dimension of a main shaft tool withdrawal groove 5;
s3, second natural aging treatment: performing secondary natural aging treatment on the rough machined part obtained in the step S2;
s4, fine grinding spindle 1 and counter spindle 2: performing fine grinding on the main shaft 1 and the auxiliary shaft 2 of the rough machined part obtained in the step S3 by using a centerless grinder;
s5, fine grinding eccentric shaft 3 and thrust surface 4: taking the main shaft 1 after the finish grinding processing as a positioning reference for clamping, carrying out finish grinding processing on an eccentric shaft 3 of a rough machining piece by using a grinding wheel after the clamping is finished, and then carrying out interpolation grinding and shape modification processing on a thrust surface 4 of the rough machining piece;
s6, deburring and phosphorizing: the finished workpiece obtained in step S5 is subjected to deburring treatment and surface phosphating treatment by a deburring machine and a phosphating machine, respectively.
As one optimization of the embodiment of the invention, the time of the first natural aging treatment is 55-70 days, and through the first natural aging treatment, the internal stress of the crankshaft casting blank is reduced, and the dimensional stability of the crankshaft casting blank before rough machining is improved.
Preferably, the time of the second natural aging treatment is 42 to 55 days, and the rough machined part needs to be subjected to rust prevention treatment before the second natural aging treatment. The rough machined part subjected to the second natural aging treatment can obtain better machining stability so as to carry out subsequent fine grinding machining.
In step S2, the rough machining is to perform turning rough machining on the crankshaft casting blank, reduce the machining allowance of the rough machining from 0.15-0.25 mm to 0.05-0.1 mm, and simultaneously control the depth of the main shaft relief groove 5 of the crankshaft to be minimum, so as to ensure the strength and rigidity of the main shaft 1, therefore, when the main shaft 1 is clamped as a positioning reference to grind the eccentric shaft 3 in step S5, the main shaft 1 has a smaller tendency to deform under stress. Because the machining allowance left for rough machining in the step S2 is only 0.05-0.1 mm, after the second natural aging treatment is completed, the main shaft 1 and the auxiliary shaft 2 of the rough machined part can be accurately ground by directly using a centerless grinder, so that the process of roughly grinding the main shaft 1 and the auxiliary shaft 2 and the investment of corresponding equipment and operators are omitted. After the process is finished, the sizes of the main shaft 1 and the auxiliary shaft 2 of the finished part are the final sizes required by the design. And then, the main shaft 1 after fine grinding is used as a positioning reference for machining and clamping, and an eccentric grinding clamp is used for clamping the main shaft 1, so that the eccentric shaft 3 and the rotating shaft of the grinding machine have good coaxiality, and a small form and position tolerance is obtained after machining. After clamping is completed, the outer circle of the eccentric shaft 3 is finely ground by the grinding wheel, and then interpolation grinding and shape correction processing are performed on the thrust surface 4 by the automatic control system according to the design requirements of a drawing. In the embodiment of the invention, the eccentric shaft 3 and the thrust surface 4 can be processed only by clamping and positioning the main shaft 1 without clamping and positioning for multiple times, so that the processing efficiency is improved. And finally, removing burr scrap iron left in the machining process on the finished workpiece obtained through the procedures by using a burr machine, and carrying out surface phosphating treatment on the finished workpiece by using a phosphating machine to obtain a finished product of the compressor crankshaft.
As a preferable example of the embodiment of the present invention, the grinding wheel used in the finish grinding process is a cubic boron nitride grinding wheel. The cubic boron nitride grinding wheel has strong cutting capability and high wear resistance, so that the cubic boron nitride grinding wheel has higher efficiency and is more difficult to wear than the grinding wheel with common grinding materials, and the production efficiency is favorably improved.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (1)
1. A method for processing a crankshaft of a compressor is characterized by comprising the following steps:
s1, first natural aging treatment: carrying out primary natural aging treatment on the crankshaft casting blank, wherein the time of the primary natural aging treatment is 55-70 days;
s2, rough machining of a blank: roughly machining the crankshaft casting blank subjected to the first natural aging treatment, keeping machining allowance of 0.05-0.1 mm in rough machining, and strictly controlling the depth dimension of a main shaft tool withdrawal groove (5);
s3, second natural aging treatment: performing second natural aging treatment on the rough machined part obtained in the step S2, wherein the time of the second natural aging treatment is 42-55 days, and before the second natural aging treatment, the rough machined part needs to be subjected to rust prevention treatment;
s4, fine grinding main shaft (1) and auxiliary shaft (2): performing fine grinding on the main shaft (1) and the auxiliary shaft (2) of the rough machined part obtained in the step S3 by using a centerless grinder;
s5, fine grinding eccentric shaft (3) and thrust surface (4): the spindle (1) after finish grinding is used as a positioning reference for clamping, grinding wheels are used for carrying out finish grinding on the eccentric shaft (3) of the rough machined part after clamping is finished, interpolation grinding and shape correction processing are carried out on the thrust surface (4) of the rough machined part, and the grinding wheels are cubic boron nitride grinding wheels;
s6, deburring and phosphorizing: the finished workpiece obtained in step S5 is subjected to deburring treatment and surface phosphating treatment by a deburring machine and a phosphating machine, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711400507.6A CN108274190B (en) | 2017-12-20 | 2017-12-20 | Method for machining crankshaft of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711400507.6A CN108274190B (en) | 2017-12-20 | 2017-12-20 | Method for machining crankshaft of compressor |
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| Publication Number | Publication Date |
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| CN108274190A CN108274190A (en) | 2018-07-13 |
| CN108274190B true CN108274190B (en) | 2020-08-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856730A (en) * | 2018-05-31 | 2018-11-23 | 江铃汽车股份有限公司 | A kind of forged steel material crankshaft smart car thrust method for processing surface |
| CN111421310A (en) * | 2020-04-24 | 2020-07-17 | 新昌县事必达精密制造有限公司 | Efficient machining process for crankshaft |
| CN117961653B (en) * | 2024-02-04 | 2024-07-05 | 广州市德善数控科技有限公司 | Preparation method of rotary compressor pump body assembly |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2338912A (en) * | 1998-06-30 | 2000-01-12 | Cummins Engine Co Ltd | Method of manufacturing a camshaft |
| CN103009021B (en) * | 2012-12-31 | 2014-12-24 | 四川绵竹鑫坤机械制造有限责任公司 | Segmented crankshaft machining process |
| CN103206451B (en) * | 2013-01-29 | 2015-11-18 | 江苏春兰动力制造有限公司 | A kind of method for manufacturing accentric shaft of compressor movement |
| CN203130768U (en) * | 2013-01-29 | 2013-08-14 | 江苏春兰动力制造有限公司 | Eccentric shaft of full-closed compressor core |
| CN105729077A (en) * | 2014-12-09 | 2016-07-06 | 重庆凌云工具有限公司 | Machining method for crankshaft |
| CN105983830A (en) * | 2015-01-30 | 2016-10-05 | 重庆文力机械有限公司 | Crankshaft machining process |
| CN105196012A (en) * | 2015-09-23 | 2015-12-30 | 四川飞亚汽车零部件有限公司 | Novel process for processing crankshaft |
| CN106141052B (en) * | 2016-08-10 | 2019-04-23 | 宁波甬微集团有限公司 | A kind of manufacturing method and its air-conditioner compressor crankshaft of air-conditioner compressor crankshaft |
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| CN108274190A (en) | 2018-07-13 |
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Denomination of invention: A machining method of compressor crankshaft Effective date of registration: 20220509 Granted publication date: 20200807 Pledgee: China Co. truction Bank Corp Guangdong FTA pilot area branch Pledgor: GUANGZHOU DESHAN CNC TECHNOLOGY Co.,Ltd. Registration number: Y2022440000084 |
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Date of cancellation: 20231027 Granted publication date: 20200807 Pledgee: China Co. truction Bank Corp Guangdong FTA pilot area branch Pledgor: GUANGZHOU DESHAN CNC TECHNOLOGY Co.,Ltd. Registration number: Y2022440000084 |