CN108274193B - Processing method of insulating guide pillar with thin-wall nylon bush - Google Patents
Processing method of insulating guide pillar with thin-wall nylon bush Download PDFInfo
- Publication number
- CN108274193B CN108274193B CN201810029838.1A CN201810029838A CN108274193B CN 108274193 B CN108274193 B CN 108274193B CN 201810029838 A CN201810029838 A CN 201810029838A CN 108274193 B CN108274193 B CN 108274193B
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- Prior art keywords
- grinding
- grinding wheel
- nylon bush
- guide pillar
- machining
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Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention relates to a method for processing an insulating guide post with a thin-wall nylon bush, which comprises the steps of finishing a grinding wheel, performing finish machining, finish machining and finishing machining after finish turning and assembling, setting reasonable steps, scientific procedures and parameters to complete the processing of an insulating guide sleeve, ensuring the requirements of high-precision form and position tolerance, dimensional tolerance and roughness of the nylon bush, determining the influence of processing thermal deformation on the precision by giving the rebound quantity, specifying the material and characteristic requirements of the grinding wheel, the processing parameter range and the appearance structure, reducing the processing deformation of parts and improving the processing quality of the surface of the parts. After the guide pillar nylon bush is ground, the surface roughness is not higher than Ra0.8, the roundness error is not more than 0.005mm, the bounce of a center hole of the guide pillar is not more than 0.005mm, and the dimensional tolerance is not more than 0.005 mm.
Description
Technical Field
The invention relates to a processing method, in particular to a processing method of an insulating guide pillar with a thin-wall nylon bush.
Background
At present, in some inductance tools needing insulation in the field of aviation, a sensing guide pillar is adopted to spray a ceramic coating to solve the insulation problem, but the thermal spraying belongs to physical mechanical bonding, the bonding strength of the coating is not too high, the impact resistance and the bearing capacity of the coating are poor, so that the coating is easy to peel off or fall off and is difficult to maintain, and the normal use of the tools is seriously influenced. Because the nylon material has high toughness and insulating property, the outer diameter of the guide post is provided with the nylon material lining, and the insulation problem of the guide post can be completely solved by replacing spraying. However, nylon belongs to non-metal engineering plastics, and has poor rigidity, heat resistance and thermal conductivity, the processing temperature is narrow, the temperature in the grinding process is difficult to control, a grinding wheel is easy to be blocked by nylon, the processing surface is rough and easy to burn, and particularly, the precision of parts is more difficult to ensure when bushings with the wall thickness of 0.75-2mm are processed. The existing guide post product requires that the nylon outer sleeve is not higher than Ra0.8 in outer diameter surface roughness, not more than 0.005mm in roundness error, not more than 0.005mm in runout relative to a guide post tip hole and not more than 0.005mm in dimensional tolerance after the processing is finished, and a mature process technology is not available at present.
Disclosure of Invention
The invention aims to provide a method for processing an insulating guide pillar with a thin-wall nylon bush, which can meet the requirement of manufacturing precision, namely the roughness of the outer diameter surface of the nylon bush is not higher than Ra0.8, the roundness error is not more than 0.005mm, the bounce of a tip hole of the guide pillar is not more than 0.005mm, and the dimensional tolerance is not more than 0.005 mm.
The technical scheme of the invention, namely the grinding method comprises the following steps:
(1) preparing a nylon bush material and a guide post material to be processed;
(2) finish turning the inner hole and the end face of the nylon bush to meet the requirement of dimensional accuracy, semi-finish machining the outer diameter, and keeping the allowance not less than 1.5 mm;
(3) finely turning the outer diameter of the guide pillar to enable the size of the guide pillar to be not less than 0.005mm in interference with the inner hole of the nylon bush;
(4) assembling the nylon bush and the guide post according to requirements;
(5) finely turning the outer diameter of the guide pillar nylon bush after assembly, and keeping the allowance not less than 0.5 mm;
(6) trimming the grinding wheel, namely trimming the grinding width of the grinding wheel to 1/3-1/6 of the length of the nylon bush by adopting a silicon carbide or corundum grinding wheel with large granularity and loose structure;
(7) clamping a guide pillar with a nylon bush on an excircle grinding machine by using a tip and a clamp, finishing a grinding wheel, and aligning the outer diameter of the nylon bush to be within 0.05mm of the runout of the tip;
(8) rough machining is carried out, the overrun amount of the two ends of the grinding wheel is 1/2-1/4 effective grinding width of the grinding wheel, the speed of a part is 10-15m/min, the speed of the grinding wheel is 28-35m/s, a longitudinal grinding mode is adopted, the rough grinding allowance is controlled within the range of 0.08-0.12mm, the rough grinding feed amount is 0.02-0.04mm, and the grinding process is accompanied with the pouring of cooling liquid;
(9) after rough machining, dressing the grinding wheel, and then performing finish machining, wherein in the machining process, the overrun amount of two ends of the grinding wheel is 1/2-1/4 effective grinding width of the grinding wheel, the rotating speed of a part is 10-15m/min, the rotating speed of the grinding wheel is 28-35m/s, a longitudinal grinding mode is adopted, the finish grinding allowance is controlled within the range of 0.015-0.005mm, the finish grinding feed amount is 0.01-0.005mm, and the grinding process is accompanied with pouring of cooling liquid;
(10) after finish machining, a grinding wheel is not required to be dressed, finishing machining is directly carried out, cooling liquid is poured in the finishing machining process, the pressure of the cooling liquid is 3-5 bar, sufficient cooling is guaranteed, the overrun amount of two ends of the grinding wheel is 1/2-1/4 effective grinding width of the grinding wheel, the rotating speed of a part is 10-15m/min, the rotating speed of the grinding wheel is 28-35m/s, a longitudinal grinding mode is adopted, the feed amount of the finishing grinding is less than 0.003mm, the outer diameter size is measured on line in the grinding process, and when the outer diameter size is larger than the theoretical value of 0.002-0.004, grinding is finished;
(11) and after the part is cooled, unloading the part from the grinding machine, and carrying out final inspection.
The invention adopts a universal lathe and a common cylindrical grinder to finish the processing of the guide post with the nylon bush.
The invention has the advantages and effects that the processing method utilizes a common lathe and a cylindrical grinder to realize the processing of the guide pillar with the nylon bush, and the requirements of high-precision form and position tolerance, dimensional tolerance and roughness of the nylon bush are ensured. The influence of the machining thermal deformation on the precision is determined by the given rebound quantity, the material and characteristic requirements of the grinding wheel, the machining parameter range and the appearance structure are specified, the machining deformation of the part is reduced, and the surface machining quality of the part is improved.
After the guide pillar nylon bush is ground, the surface roughness is not higher than Ra0.8, the roundness error is not more than 0.005mm, the bounce of a center hole of the guide pillar is not more than 0.005mm, and the dimensional tolerance is not more than 0.005 mm.
Detailed Description
A processing method of an insulating guide pillar with a thin-wall nylon bush comprises the following specific steps:
(1) preparing a nylon bush material and a guide post material to be processed;
(2) finish turning the inner hole and the end face of the nylon bush to meet the requirement of dimensional accuracy, semi-finish machining the outer diameter, and keeping the allowance not less than 1.5 mm;
(3) finely turning the outer diameter of the guide pillar to enable the size of the guide pillar to be not less than 0.005mm in interference with the inner hole of the nylon bush;
(4) assembling the nylon bush and the guide post according to requirements;
(5) finely turning the outer diameter of the guide pillar nylon bush after assembly, and keeping the allowance not less than 0.5 mm;
(6) trimming the grinding wheel, namely trimming the grinding width of the grinding wheel to 1/3-1/6 of the length of the nylon bush by adopting a silicon carbide or corundum grinding wheel with large granularity and loose structure;
(7) clamping a guide pillar with a nylon bush on an excircle grinding machine by using a tip and a clamp, finishing a grinding wheel, and aligning the outer diameter of the nylon bush to be within 0.05mm of the runout of the tip;
(8) rough machining is carried out, the overrun amount of the two ends of the grinding wheel is 1/2-1/4 effective grinding width of the grinding wheel, the speed of a part is 10-15m/min, the speed of the grinding wheel is 28-35m/s, a longitudinal grinding mode is adopted, the rough grinding allowance is controlled within the range of 0.08-0.12mm, the rough grinding feed amount is 0.02-0.04mm, and the grinding process is accompanied with the pouring of cooling liquid;
(9) after rough machining, dressing the grinding wheel, and then performing finish machining, wherein in the machining process, the overrun amount of two ends of the grinding wheel is 1/2-1/4 effective grinding width of the grinding wheel, the rotating speed of a part is 10-15m/min, the rotating speed of the grinding wheel is 28-35m/s, a longitudinal grinding mode is adopted, the finish grinding allowance is controlled within the range of 0.015-0.005mm, the finish grinding feed amount is 0.01-0.005mm, and the grinding process is accompanied with pouring of cooling liquid;
(10) after finish machining, a grinding wheel is not required to be dressed, finishing machining is directly carried out, cooling liquid is poured in the finishing machining process, the pressure of the cooling liquid is 3-5 bar, sufficient cooling is guaranteed, the overrun amount of two ends of the grinding wheel is 1/2-1/4 effective grinding width of the grinding wheel, the rotating speed of a part is 10-15m/min, the rotating speed of the grinding wheel is 28-35m/s, a longitudinal grinding mode is adopted, the feed amount of the finishing grinding is less than 0.003mm, the outer diameter size is measured on line in the grinding process, and when the outer diameter size is larger than the theoretical value of 0.002-0.004, grinding is finished;
(11) and after the part is cooled, unloading the part from the grinding machine, and carrying out final inspection.
The invention adopts a universal lathe and a common cylindrical grinder to finish the processing of the guide post with the nylon bush.
Claims (2)
1. The method for processing the insulating guide pillar with the thin-wall nylon bush is characterized by comprising the following steps of:
(1) preparing a nylon bush material and a guide post material to be processed;
(2) finish turning the inner hole and the end face of the nylon bush to meet the requirement of dimensional accuracy, semi-finish machining the outer diameter, and keeping the allowance not less than 1.5 mm;
(3) finely turning the outer diameter of the guide pillar to enable the size of the guide pillar to be not less than 0.005mm in interference with the inner hole of the nylon bush;
(4) assembling the nylon bush and the guide post according to requirements;
(5) finely turning the outer diameter of the guide pillar nylon bush after assembly, and keeping the allowance not less than 0.5 mm;
(6) trimming the grinding wheel, namely trimming the grinding width of the grinding wheel to 1/3-1/6 of the length of the nylon bush by adopting a silicon carbide or corundum grinding wheel with large granularity and loose structure;
(7) clamping a guide pillar with a nylon bush on an excircle grinding machine by using a tip and a clamp, finishing a grinding wheel, and aligning the outer diameter of the nylon bush to be within 0.05mm of the runout of the tip;
(8) performing rough machining, wherein the overrun amount of two ends of the grinding wheel is 1/2-1/4 effective grinding width of the grinding wheel, the rotating speed of the guide pillar with the nylon bush is 10-15m/min, the rotating speed of the grinding wheel is 28-35m/s, a longitudinal grinding mode is adopted, the coarse grinding allowance is controlled within the range of 0.08-0.12mm, the coarse grinding feed amount is 0.02-0.04mm, and the grinding process is accompanied with the pouring of cooling liquid;
(9) after rough machining, dressing the grinding wheel, and then performing finish machining, wherein in the machining process, the overrun amount of two ends of the grinding wheel is 1/2-1/4 effective grinding width of the grinding wheel, the rotating speed of a guide pillar with a nylon bush is 10-15m/min, the rotating speed of the grinding wheel is 28-35m/s, a longitudinal grinding mode is adopted, the finish grinding allowance is controlled within the range of 0.015-0.005mm, the finish grinding feed amount is 0.01-0.005mm, and the grinding process is accompanied with the pouring of cooling liquid;
(10) after finish machining, a grinding wheel is not required to be dressed, finishing machining is directly carried out, cooling liquid is poured in the finishing machining process, the pressure of the cooling liquid is 3-5 bar, sufficient cooling is guaranteed, the overrun amount of two ends of the grinding wheel is 1/2-1/4 effective grinding width of the grinding wheel, the rotating speed of a guide pillar with a nylon bush is 10-15m/min, the rotating speed of the grinding wheel is 28-35m/s, a longitudinal grinding mode is adopted, the feeding amount of the finishing grinding is less than 0.003mm, the outer diameter size is measured on line in the grinding process, and when the outer diameter size is larger than the theoretical value of 0.002-0.004mm, grinding is finished;
(11) and after the guide post with the nylon bush is cooled, unloading the guide post from the grinding machine, and carrying out final inspection.
2. The method for processing the insulating guide post with the thin-wall nylon bush as claimed in claim 1, wherein the grinding process is carried out by a general lathe or a general cylindrical grinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029838.1A CN108274193B (en) | 2018-01-12 | 2018-01-12 | Processing method of insulating guide pillar with thin-wall nylon bush |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029838.1A CN108274193B (en) | 2018-01-12 | 2018-01-12 | Processing method of insulating guide pillar with thin-wall nylon bush |
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| Publication Number | Publication Date |
|---|---|
| CN108274193A CN108274193A (en) | 2018-07-13 |
| CN108274193B true CN108274193B (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810029838.1A Active CN108274193B (en) | 2018-01-12 | 2018-01-12 | Processing method of insulating guide pillar with thin-wall nylon bush |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112518431B (en) * | 2019-09-18 | 2022-07-12 | 无锡国盛生物工程股份有限公司 | Improved forming part slice processing technology |
| CN111300178B (en) * | 2020-03-20 | 2022-07-08 | 中国航发哈尔滨东安发动机有限公司 | Method for controlling grinding deformation of central pull rod of helicopter |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49119886U (en) * | 1973-02-06 | 1974-10-14 | ||
| DE3316257C1 (en) * | 1983-05-04 | 1984-08-23 | Goetze Ag, 5093 Burscheid | Machine for machining the gap of workpieces cut open at a point on their periphery |
| CN101460298A (en) * | 2006-04-06 | 2009-06-17 | 麦德麦印刷解决方案欧洲股份公司 | Embossing device, such as a cylinder or a sleeve |
| CN101791758A (en) * | 2009-01-30 | 2010-08-04 | 阿尔斯通水电设备法国公司 | Hydraulic machine newly manufactured component and manufacturing or the method for keeping in repair described parts |
| CN103639664A (en) * | 2013-12-04 | 2014-03-19 | 马正斌 | Method for manufacturing sleeve |
| CN104476117A (en) * | 2014-10-30 | 2015-04-01 | 上海飞机制造有限公司 | High-accuracy thin-wall bush machining method |
| CN105171540A (en) * | 2015-09-22 | 2015-12-23 | 黄山众拓工业泵制造有限公司 | Internal grinding tool for bush of oil-gas transport pump |
| CN105965206A (en) * | 2016-05-10 | 2016-09-28 | 重庆江增船舶重工有限公司 | Processing method for collar thrust bearing of turbocharger and grinding tool therefor |
| CN106826132A (en) * | 2017-03-01 | 2017-06-13 | 天津市利成工贸有限公司 | A kind of processing technology of bushing of shifting gears |
-
2018
- 2018-01-12 CN CN201810029838.1A patent/CN108274193B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49119886U (en) * | 1973-02-06 | 1974-10-14 | ||
| DE3316257C1 (en) * | 1983-05-04 | 1984-08-23 | Goetze Ag, 5093 Burscheid | Machine for machining the gap of workpieces cut open at a point on their periphery |
| CN101460298A (en) * | 2006-04-06 | 2009-06-17 | 麦德麦印刷解决方案欧洲股份公司 | Embossing device, such as a cylinder or a sleeve |
| CN101791758A (en) * | 2009-01-30 | 2010-08-04 | 阿尔斯通水电设备法国公司 | Hydraulic machine newly manufactured component and manufacturing or the method for keeping in repair described parts |
| CN103639664A (en) * | 2013-12-04 | 2014-03-19 | 马正斌 | Method for manufacturing sleeve |
| CN104476117A (en) * | 2014-10-30 | 2015-04-01 | 上海飞机制造有限公司 | High-accuracy thin-wall bush machining method |
| CN105171540A (en) * | 2015-09-22 | 2015-12-23 | 黄山众拓工业泵制造有限公司 | Internal grinding tool for bush of oil-gas transport pump |
| CN105965206A (en) * | 2016-05-10 | 2016-09-28 | 重庆江增船舶重工有限公司 | Processing method for collar thrust bearing of turbocharger and grinding tool therefor |
| CN106826132A (en) * | 2017-03-01 | 2017-06-13 | 天津市利成工贸有限公司 | A kind of processing technology of bushing of shifting gears |
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| CN108274193A (en) | 2018-07-13 |
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