CN112846747B - Fine adjustment method for coaxiality of frame bearing bush - Google Patents
Fine adjustment method for coaxiality of frame bearing bush Download PDFInfo
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- CN112846747B CN112846747B CN202110026464.XA CN202110026464A CN112846747B CN 112846747 B CN112846747 B CN 112846747B CN 202110026464 A CN202110026464 A CN 202110026464A CN 112846747 B CN112846747 B CN 112846747B
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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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/10—Aligning parts to be fitted together
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The invention relates to a fine adjustment method for coaxiality of a frame bearing bush, which comprises the following steps: 1. cleaning the end faces and the hole faces of the four holes on the frame; 2. selecting a reference surface: selecting an A1 surface as a reference surface, and selecting a processing reference surface R1 of the frame, wherein the A1 surface, the R1 surface and the C1 surface are mutually vertical in pairs to form a rectangular coordinate system; 3. two bearing bushes are initially installed: one bearing bush is arranged in the hole D of the frame and fixed, and the other bearing bush is arranged in the hole C of the frame but not fastened; 4. cleaning and adjusting the reference surface; 5. performing the first step of fine adjustment; 6. performing the second step of fine adjustment; 7. repeating the adjusting processes of the step 5 and the step 6 repeatedly until the height difference of the bearing bushes in the two holes in two mutually perpendicular directions is less than 0.0015 mm; 8. and after the bearing bush is adjusted, measuring related form and position tolerance on a high-precision coordinate machine, and verifying the adjustment precision. The invention shortens the adjustment period, saves the adjustment tool and improves the adjustment stability.
Description
Technical Field
The invention belongs to the technical field of fitter assembly, and particularly relates to a fine adjustment method for coaxiality of a frame bearing bush.
Background
The structure of the frame bearing bush is formed by assembling the bearing bush on a frame part, the coaxiality of the frame bearing bush directly influences the inclination angle error of the rotation axis of the shafting, and the rotation precision and the zero returning precision of the shafting are determined. Therefore, in order to improve the rotation precision of the frame bearing bush and reduce the zero return error of the frame bearing bush, the method for adjusting the coaxiality of the frame bearing bush can be optimized, and the fine adjustment precision of the coaxiality of the frame bearing bush is improved.
The mounting and adjusting method of the domestic frame bearing bush mainly comprises two methods, one is a method for rotating a meter frame, and the other is a method for rotating a turntable. And the rotating meter frame method is more mature and reliable by analyzing the working principle. However, in the method for rotating the meter frame, the tool is large in size, high in tool precision requirement, complex in operation process, poor in stability and susceptible to environmental vibration, and the frame type bushing bearing is long in adjustment period.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a fine adjustment method for the coaxiality of a frame bearing bush, which can be used for adjusting and shortening the period, saving adjustment tools and improving the adjustment stability.
The above object of the present invention is achieved by the following technical solutions:
a fine adjustment method for coaxiality of frame bearing bushes comprises the following steps of:
removing burrs of the outer end surfaces A1, B1, C1 and D1 of the A, B, C, D four holes of the frame and the contact surface of the bearing bush and the frame, and wiping the burrs clean;
selecting one end with better perpendicularity relative to the end surfaces C1 and D1 from the end surfaces A1 and B1 as a reference positioning surface, and selecting an A1 surface as a reference surface and then selecting a machining reference surface R1 of the frame, wherein the A1 surface, the R1 surface and the C1 surface are mutually perpendicular in pairs at the moment to form a rectangular coordinate system;
step 3, initially installing two bearing bushes:
3.1 firstly, a bearing bush is arranged in a hole D of the frame, and a torque wrench is used for screwing a screw for connecting the bearing bush and the frame, so that the bearing bush is fastened and positioned;
3.2, another bearing bush is arranged in the hole C of the frame, the screw for fixing the bearing bush is slightly screwed, and the screwing strength is proper to enable the copper plate to slightly knock the non-working position at the edge of the bearing bush to enable the bearing bush to slightly displace in the hitting direction;
step 4, cleaning and adjusting the reference surface:
selecting the surface of a 00-grade marble slab as a reference surface for adjustment, removing burrs from the surfaces of an A1 surface, an R1 surface and the surface of the 00-grade marble slab, and wiping the surface with clean non-woven fabric and absolute ethyl alcohol until a working area is clean;
and 5, carrying out first-step fine adjustment:
putting the R1 surface of the frame on a 00-grade marble flat plate, measuring the central heights of a bearing bush arranged in a hole C and a bearing bush arranged in a hole D by using a height measuring instrument with the repetition precision superior to 0.001mm, and adjusting the bearing bushes in the hole C up and down by taking the central height of the bearing bush in the hole D as a reference to ensure that the central height difference of the bearing bushes in the two holes is less than 0.0015mm, and slightly screwing corresponding fastening screws at the upper end and the lower end in the state after the requirement is met;
and 6, performing second-step fine adjustment:
rotating the frame by 90 degrees, placing the frame on a 00-level marble flat plate by taking the A1 surface as a reference, measuring the central heights of a bearing bush in a C hole and a bearing bush in a D hole in the direction vertical to the measuring direction in the step 5, and adjusting the bearing bushes in the C hole up and down by taking the central height of the bearing bush in the D hole as a reference to ensure that the central height difference of the bearing bushes in the two holes is less than 0.0015mm, and slightly screwing the corresponding fastening screws at the upper end and the lower end in the state after the requirement is met;
and 7, repeating the adjusting processes of the step 5 and the step 6 repeatedly until the bearing bushes in the two holes are arrangedThe height difference between the two mutually perpendicular directions is less than 0.0015 mm; then all the fastening screws for fixing the bearing bush are tightened by using a torque wrench, and the difference of the center heights in the two directions is verified again. At the moment, the maximum value of the theoretical center distance of the bearing bush can be calculated to be 2SQRT (0.0015)2+0.00152)；
And 8, measuring related form and position tolerances on a high-precision coordinate machine after the bearing bush is well adjusted, and verifying the adjustment precision.
Further: in the step 1, removing burrs by using oilstone, and dipping clean non-woven fabric into absolute ethyl alcohol to clean.
The invention has the advantages and positive effects that:
1. the bearing bush is adjusted by means of mutual reference of the two reference surfaces, the repeated testing precision is high, and the stability in the adjusting process is high.
2. The invention measures the center height of the bearing bush by means of the height measuring instrument, so that the fine adjustment efficiency is high, and the period of the fine adjustment is greatly shortened.
3. The invention does not need additional adjusting tools except for the height indicator, saves the adjusting tools and reduces the adjusting cost.
4. The invention has simple operation, has no high requirement on the operation technology of workshop workers, and has wider applicable range of operators.
Drawings
FIG. 1 is a schematic view of a bushing-frame assembly of the present invention;
FIG. 2 is a schematic view of the frame structure of the present invention;
FIG. 3 is a schematic view of a bearing cartridge of the present invention;
FIG. 4 is a schematic view of the datum surfaces of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative only and not limiting, and the scope of the present invention is not limited thereby.
A fine adjustment method for coaxiality of frame bearing bushes comprises the following steps of:
burrs on the outer end faces A11.9, B11.7, C11.8 and D11.5 of the A, B, C, D four holes of the frame and the contact face of the bearing bush and the frame are removed by using oilstones, and the frame is wiped clean by dipping clean non-woven fabric into absolute ethyl alcohol.
selecting one end with better perpendicularity relative to the end surfaces C1 and D1 from the end surfaces A1 and B1 as a reference positioning surface, and selecting an A1 surface as a reference surface and then selecting a machining reference surface R1 of the frame, wherein the A1 surface, the R1 surface and the C1 surface are mutually perpendicular in pairs at the moment to form a rectangular coordinate system;
step 3, initially installing two bearing bushes:
3.1 firstly, a bearing bush is arranged in a hole D of the frame, and a torque wrench is used for screwing a screw for connecting the bearing bush and the frame, so that the bearing bush is fastened and positioned;
3.2, another bearing bush is arranged in the hole C of the frame, the screw for fixing the bearing bush is slightly screwed, and the screwing strength is proper to enable the copper plate to slightly knock the non-working position at the edge of the bearing bush to enable the bearing bush to slightly displace in the hitting direction;
step 4, cleaning and adjusting the reference surface:
selecting the surface of a 00-grade marble slab as a reference surface for adjustment, removing burrs from the surfaces of an A1 surface, an R1 surface and the surface of the 00-grade marble slab, and wiping the surface with clean non-woven fabric and absolute ethyl alcohol until a working area is clean;
and 5, carrying out first-step fine adjustment:
putting the R1 surface of the frame on a 00-grade marble flat plate, measuring the central heights of a bearing bush arranged in a hole C and a bearing bush arranged in a hole D by using a height measuring instrument with the repetition precision superior to 0.001mm, and adjusting the bearing bushes in the hole C up and down by taking the central height of the bearing bush in the hole D as a reference to ensure that the central height difference of the bearing bushes in the two holes is less than 0.0015mm, and slightly screwing corresponding fastening screws at the upper end and the lower end in the state after the requirement is met;
and 6, performing second-step fine adjustment:
rotating the frame by 90 degrees, placing the frame on a 00-level marble flat plate by taking the A1 surface as a reference, measuring the central heights of a bearing bush in a C hole and a bearing bush in a D hole in the direction vertical to the measuring direction in the step 5, and adjusting the bearing bushes in the C hole up and down by taking the central height of the bearing bush in the D hole as a reference to ensure that the central height difference of the bearing bushes in the two holes is less than 0.0015mm, and slightly screwing the corresponding fastening screws at the upper end and the lower end in the state after the requirement is met;
step 7, repeating the adjusting processes of the step 5 and the step 6 repeatedly until the height difference of the bearing bushes in the two holes in two mutually perpendicular directions is less than 0.0015 mm; then all the fastening screws for fixing the bearing bush are tightened by using a torque wrench, and the difference of the center heights in the two directions is verified again. At the moment, the maximum value of the theoretical center distance of the bearing bush can be calculated to be 2SQRT (0.0015)2+0.00152) (ii) a This accuracy adjustment requirement can often be achieved within 3 rounds in practical operation.
And 8, measuring related form and position tolerances on a high-precision coordinate machine after the bearing bush is well adjusted, and verifying the adjustment precision.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (2)
1. A fine adjustment method for coaxiality of frame bearing bushes comprises the following steps of:
step 1, cleaning the end face of a hole on a frame and the end face of a bearing bush:
removing burrs of the outer end surfaces A1, B1, C1 and D1 of the A, B, C, D four holes of the frame and the contact surface of the bearing bush and the frame, and wiping the burrs clean;
step 2, selecting a reference surface:
selecting one end with better perpendicularity relative to the end surfaces C1 and D1 from the end surfaces A1 and B1 as a reference positioning surface, and selecting an A1 surface as a reference surface and then selecting a machining reference surface R1 of the frame, wherein the A1 surface, the R1 surface and the C1 surface are mutually perpendicular in pairs at the moment to form a rectangular coordinate system;
step 3, initially installing two bearing bushes:
3.1 firstly, a bearing bush is arranged in a hole D of the frame, and a torque wrench is used for screwing a screw for connecting the bearing bush and the frame, so that the bearing bush is fastened and positioned;
3.2, another bearing bush is arranged in the hole C of the frame, the screw for fixing the bearing bush is slightly screwed, and the screwing strength is proper to enable the copper plate to slightly knock the non-working position at the edge of the bearing bush to enable the bearing bush to slightly displace in the hitting direction;
step 4, cleaning and adjusting the reference surface:
selecting the surface of a 00-grade marble slab as a reference surface for adjustment, removing burrs from the surfaces of an A1 surface, an R1 surface and the surface of the 00-grade marble slab, and wiping the surface with clean non-woven fabric and absolute ethyl alcohol until a working area is clean;
and 5, carrying out first-step fine adjustment:
putting the R1 surface of the frame on a 00-grade marble flat plate, measuring the central heights of a bearing bush arranged in a hole C and a bearing bush arranged in a hole D by using a height measuring instrument with the repetition precision superior to 0.001mm, and adjusting the bearing bushes in the hole C up and down by taking the central height of the bearing bush in the hole D as a reference to ensure that the central height difference of the bearing bushes in the two holes is less than 0.0015mm, and slightly screwing corresponding fastening screws at the upper end and the lower end in the state after the requirement is met;
and 6, performing second-step fine adjustment:
rotating the frame by 90 degrees, placing the frame on a 00-level marble flat plate by taking the A1 surface as a reference, measuring the central heights of a bearing bush in a C hole and a bearing bush in a D hole in the direction vertical to the measuring direction in the step 5, and adjusting the bearing bushes in the C hole up and down by taking the central height of the bearing bush in the D hole as a reference to ensure that the central height difference of the bearing bushes in the two holes is less than 0.0015mm, and slightly screwing the corresponding fastening screws at the upper end and the lower end in the state after the requirement is met;
step 7, repeating the adjusting processes of the step 5 and the step 6 repeatedly until the height difference of the bearing bushes in the two holes in two mutually perpendicular directions is less than 0.0015 mm; then, tightening all fastening screws for fixing the bearing bush by using a torque wrench, and verifying the central height difference in two directions again; at the moment, the maximum value of the theoretical center distance of the bearing bush can be calculated to be 2SQRT (0.0015)2+0.00152)；
And 8, measuring related form and position tolerances on a high-precision coordinate machine after the bearing bush is well adjusted, and verifying the adjustment precision.
2. The fine tuning method for the coaxiality of the frame-like bearing bushing according to claim 1, characterized in that: in the step 1, removing burrs by using oilstone, and dipping clean non-woven fabric into absolute ethyl alcohol to clean.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110026464.XA CN112846747B (en) | 2021-01-08 | 2021-01-08 | Fine adjustment method for coaxiality of frame bearing bush |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110026464.XA CN112846747B (en) | 2021-01-08 | 2021-01-08 | Fine adjustment method for coaxiality of frame bearing bush |
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| CN112846747A CN112846747A (en) | 2021-05-28 |
| CN112846747B true CN112846747B (en) | 2022-04-12 |
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| CN101468437A (en) * | 2007-12-26 | 2009-07-01 | 深圳市大族激光科技股份有限公司 | Method for processing stator |
| CN101543952A (en) * | 2009-05-05 | 2009-09-30 | 沪东中华造船(集团)有限公司 | Device and method for mounting bearing bushing in interference fit with marine shafting |
| CN103331579A (en) * | 2013-06-27 | 2013-10-02 | 湖北三江航天万峰科技发展有限公司 | Method for manufacturing and debugging inner frame assembly with shafts at two ends |
| CN104458127A (en) * | 2014-12-05 | 2015-03-25 | 南车洛阳机车有限公司 | Hard bearing dynamic balancing machine precision detection and verifying unit and precision calibration process |
| CN105091866A (en) * | 2015-09-11 | 2015-11-25 | 天津大学 | Part position and posture identification visual system and calibration method thereof |
| CN108645369A (en) * | 2018-05-16 | 2018-10-12 | 大连大学 | The depth of parallelism reference direction judgment method of relative datum element axis |
| CN208276463U (en) * | 2018-05-31 | 2018-12-25 | 浙江开创电气有限公司 | Bearing automatic press mounting equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130032120A1 (en) * | 2011-08-04 | 2013-02-07 | Caterpillar, Inc. | Piston For Internal Combustion Engine And Method |
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2021
- 2021-01-08 CN CN202110026464.XA patent/CN112846747B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468437A (en) * | 2007-12-26 | 2009-07-01 | 深圳市大族激光科技股份有限公司 | Method for processing stator |
| CN101543952A (en) * | 2009-05-05 | 2009-09-30 | 沪东中华造船(集团)有限公司 | Device and method for mounting bearing bushing in interference fit with marine shafting |
| CN103331579A (en) * | 2013-06-27 | 2013-10-02 | 湖北三江航天万峰科技发展有限公司 | Method for manufacturing and debugging inner frame assembly with shafts at two ends |
| CN104458127A (en) * | 2014-12-05 | 2015-03-25 | 南车洛阳机车有限公司 | Hard bearing dynamic balancing machine precision detection and verifying unit and precision calibration process |
| CN105091866A (en) * | 2015-09-11 | 2015-11-25 | 天津大学 | Part position and posture identification visual system and calibration method thereof |
| CN108645369A (en) * | 2018-05-16 | 2018-10-12 | 大连大学 | The depth of parallelism reference direction judgment method of relative datum element axis |
| CN208276463U (en) * | 2018-05-31 | 2018-12-25 | 浙江开创电气有限公司 | Bearing automatic press mounting equipment |
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