CN109719493A - A kind of parts on shaft gap removing method - Google Patents
A kind of parts on shaft gap removing method Download PDFInfo
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- CN109719493A CN109719493A CN201811607993.3A CN201811607993A CN109719493A CN 109719493 A CN109719493 A CN 109719493A CN 201811607993 A CN201811607993 A CN 201811607993A CN 109719493 A CN109719493 A CN 109719493A
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Abstract
The invention belongs to part's machining errors control technology fields, and in particular to a kind of parts on shaft gap removing method.This method locks left and right bearing outer ring using two pressing rings respectively, dial gauge is tested on axis behind gap, adjusting washer is added, bearing internal external circle face height difference is set to be equal to bearing clearance, bearing inner race is locked using two adjusting nuts respectively again, washer reaches positioning and pre-tightens purpose, completely eliminates gap on axis, shafting structure is rigidly good, and rotates flexible.The present invention disposably measures parts on shaft foozle and bearing clearance, after the completion of clearance test, increases adjusting washer thickness, eliminates parts on shaft gap, guarantees structural rigidity.It is equal with the bearings at both ends clearance value that assembly is selected to meet part processing and manufacturing error after increase adjusting washer.
Description
Technical field
The invention belongs to part's machining errors control technology fields, and in particular to a kind of parts on shaft gap removing method.
Background technique
The rigidity of parts on shaft structure is embodied in gap on axis, and gap is divided into two kinds on axis, and one is axial floats
Root, this gap Producing reason is by brought by original clearance of bearing itself；Second of gap is to eliminate axis
Hold what clearance design generated, due to the influence of fabrication error, so that practical set fails to reach design requirement, this gap is known as
Foozle.
For the assembly method of foozle, it is usually after measuring single part actual processing size and bearing clearance,
Dimension chain is calculated, show that adjusting washer thickness is assembled, but it is undesirable to assemble result.The size in gap finally influences axis on axis
The rotation degree of flexibility of upper part and axial play.After being assembled using conventional method, on axis the case where gap there are two types of, first
Kind for when adjusting washer thickness low LCL, as shown in Figure 1, bearing clearance is gradually reduced during tightening adjusting nut 1, bearing
Inner ring is mutually staggered with outer ring, but fails to achieve the purpose that positioning pre-tightens, and bearing face is not bonded with parts on shaft, bearing internal external
Enclosing face height difference has been more than bearing clearance value, continues to tighten that the rotation of 1 rear bearing of adjusting nut is not flexible or even stuck, this is just needed
Increase adjusting washer thickness to limit the displacement of bearing inner race.Second is when 2 thickness of adjusting washer fails whole eliminations
When bearing clearance, as shown in Fig. 2, bearing internal external circle face height difference is respectively less than the clearance of bearing itself, platform rotation can be very clever
Living, but will lead to frame due to not completely eliminating bearing clearance is axially having certain play, platform is vibrated doing
Vibration level can be amplified when test.Gap on axis only is adjusted by increasing and decreasing adjustment copper gasket thickness repeatedly, it could most
Reach gap eventually to be 0 and rotate flexible purpose.
Summary of the invention
(1) technical problems to be solved
The present invention proposes a kind of parts on shaft gap removing method, to solve that parts on shaft gap how to be made to reach ideal dress
The technical issues of with state.
(2) technical solution
In order to solve the above-mentioned technical problem, the present invention proposes a kind of parts on shaft gap removing method, the gap elimination side
Method includes the following steps:
S1, after rotor, axis and two bearings are packed into frames, is compressed respectively using two pressing rings positioned at rotor two
The outer ring of two bearings of side, remaining parts are not installed on axis, and rotor can slide in the axial direction；
S2, after rotor is pushed into left side extreme position using thrust, dial gauge gauge outfit is abutted into left side axial end, percentage
Table test value zero establishes dial gauge measurement zero-bit；Wherein,
Thrust F:F=K+f is calculated according to the following formula
In formula, L is pretightning force suffered by bearing；F is maximum static friction force, and f=uN, u are the static friction factor of axis, and N is frame
Frame gravity；
S3, after obtaining and measuring zero-bit, by thrust reversing, frame is pulled to move to right limit position from left side extreme position
It sets, the difference of percentage meter reading is bearing clearance and foozle；
S4, the thickness for selecting adjusting washer, keep the difference between the difference of percentage meter reading and the thickness of adjusting washer small
In equal to 0.01mm；
S5, using dial gauge according to step S3 and S4 repetition measurement bearing clearance and foozle, reassemble axis after meeting the requirements
Remaining upper components.
Further, the static friction factor u of axis is 1.6, and frame gravity N is 19.6N, and bearing pre-fastening K is 2N.
(3) beneficial effect
Parts on shaft gap proposed by the present invention removing method, this method are locked outside the bearing of left and right respectively using two pressing rings
Circle, dial gauge are tested on axis behind gap, and adjusting washer is added, and bearing internal external circle face height difference is made to be equal to bearing clearance, then
Bearing inner race is locked using two adjusting nuts respectively, washer reaches positioning and pre-tightens purpose, completely eliminates gap on axis, shafting knot
Structure is rigidly good, and rotates flexible.The present invention disposably measures parts on shaft foozle and bearing clearance, and clearance test is completed
Afterwards, increase adjusting washer thickness, eliminate parts on shaft gap, guarantee structural rigidity.Meet part processing after increasing adjusting washer
Foozle is equal with the bearings at both ends clearance value that assembly is selected.The present invention by component assembly in platform axle it is good after carry out correlation again
The integrated testing of size does not need to calculate dimension chain, and deviation accumulation and rigging error when independent part testing is avoided to influence,
And it can realize platform structure rigidly assembly result controllability according to measurement the data obtained, not need repeated disassembled and assembled.
Detailed description of the invention
Fig. 1 is that gap adjusts situation schematic diagram on the first axis in conventional assembly method；
Fig. 2 is that gap adjusts situation schematic diagram on second of axis in conventional assembly method；
Fig. 3 is pressing ring scheme of installation in the embodiment of the present invention；
Fig. 4 is to read dial gauge in the embodiment of the present invention to read difference schematic diagram；
Fig. 5 is adjusting washer scheme of installation in the embodiment of the present invention；
Fig. 6 is remaining parts schematic diagram in assembled shaft in the embodiment of the present invention.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to tool of the invention
Body embodiment is described in further detail.
The present embodiment proposes a kind of parts on shaft gap removing method, which mainly includes the following steps:
Step 1, after rotor, axis and two bearings are packed into frames, use the first pressing ring 3 and the second pressing ring 4 difference
The outer ring of two bearings is compressed, remaining parts are not installed on axis；At this point, rotor can slide in the axial direction, as shown in Figure 3；
Step 2 calculates thrust F
The size that thrust F subtracts maximum static friction force f is pretightning force K:K=F-f suffered by bearing.Center component self weight m
About 2kg, according to axis the selection of material, surface roughness and matching relationship, the static friction factor u of chosen axis is 1.6, and is recognized
It is equal with force of sliding friction for the maximum static friction force of axis.Maximum static friction force f can be calculated according to following formula on axis: f=uN
=1.6 × 2 × 9.8 ≈ 31 (N).
Bearing pre-fastening K is controlled in 2N, i.e. bearing internal external circle end face is in 0 state, then the size of thrust F are as follows: F=
K+f=33 (N).
Step 3 after rotor is pushed into left side extreme position using thrust F, abuts left side shaft end using dial gauge gauge outfit
Face, dial gauge test value zero establish dial gauge measurement zero-bit.
Step 4, after obtaining and measuring zero-bit, thrust F is reversed, pull frame to move to right pole from left side extreme position
Extreme position, the difference a of percentage meter reading are bearing clearance and foozle, as shown in Figure 4.
Step 5, the thickness b for selecting adjusting washer 2, make 0 < a-b≤0.01mm, b value as finally need increased adjustment
The thickness of washer 2, assembly result are as shown in Figure 5.
Step 6, using dial gauge according to step 3,4 repetition measurement bearing clearances and foozle, reassemble axis after meeting the requirements
Remaining upper components, final assembly result are as shown in Figure 6.
In addition after adjusting washer, bearing inner race end face relative to cycle surface position just it has been determined that and not having on axis
Gap, bearing pre-tightened mode are that positioning pre-tightens, and the size of pretightning force is only related with bearing internal external circle end face relative position, so not
It can be because to causing bearing stuck after two excessive screwing forces of adjusting nuts application.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (2)
1. a kind of parts on shaft gap removing method, which is characterized in that the gap removing method includes the following steps:
S1, after rotor, axis and two bearings are packed into frames, is compressed respectively using two pressing rings and is located at rotor two sides
The outer ring of two bearings, remaining parts are not installed on axis, and rotor can slide in the axial direction；
S2, after rotor is pushed into left side extreme position using thrust, dial gauge gauge outfit is abutted into left side axial end, dial gauge is surveyed
Examination value zero establishes dial gauge measurement zero-bit；Wherein,
Thrust F:F=K+f is calculated according to the following formula
In formula, L is pretightning force suffered by bearing；F is maximum static friction force, and f=uN, u are the static friction factor of axis, and N is frame weight
Power；
S3, after obtaining and measuring zero-bit, by thrust reversing, frame is pulled to move to right extreme position from left side extreme position,
The difference of percentage meter reading is bearing clearance and foozle；
S4, the thickness for selecting adjusting washer are less than difference between the difference of percentage meter reading and the thickness of adjusting washer etc.
In 0.01mm；
S5, using dial gauge according to step S3 and S4 repetition measurement bearing clearance and foozle, it is reassembled on axis after meeting the requirements
Remaining components.
2. the method as described in claim 1, which is characterized in that the static friction factor u of the axis is 1.6, and frame gravity N is
19.6N, bearing pre-fastening K are 2N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811607993.3A CN109719493A (en) | 2018-12-27 | 2018-12-27 | A kind of parts on shaft gap removing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811607993.3A CN109719493A (en) | 2018-12-27 | 2018-12-27 | A kind of parts on shaft gap removing method |
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| CN109719493A true CN109719493A (en) | 2019-05-07 |
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ID=66296546
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811607993.3A Pending CN109719493A (en) | 2018-12-27 | 2018-12-27 | A kind of parts on shaft gap removing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117067152A (en) * | 2023-07-07 | 2023-11-17 | 苏州铁近机电科技股份有限公司 | Assembling method and device for bearing assembly of high-speed compressor and rotor assembly |
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| CN101922906A (en) * | 2010-08-11 | 2010-12-22 | 洛阳轴研科技股份有限公司 | Method for measuring axial clearance and preload clearance of back-to-back angular contact ball bearings |
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| RU2583978C1 (en) * | 2014-11-27 | 2016-05-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Оренбургский государственный университет" | Force-measuring pressing roller of press-granulator |
| CN105673715A (en) * | 2016-03-30 | 2016-06-15 | 重庆齿轮箱有限责任公司 | Pre-tightening tool, pre-tightening method and adjusting method for axial play of roller bearing |
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2018
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| CN101922906A (en) * | 2010-08-11 | 2010-12-22 | 洛阳轴研科技股份有限公司 | Method for measuring axial clearance and preload clearance of back-to-back angular contact ball bearings |
| RU2583978C1 (en) * | 2014-11-27 | 2016-05-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Оренбургский государственный университет" | Force-measuring pressing roller of press-granulator |
| CN205156822U (en) * | 2015-12-08 | 2016-04-13 | 新昌县大市聚正好轴承厂 | Bearing clearance testing arrangement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117067152A (en) * | 2023-07-07 | 2023-11-17 | 苏州铁近机电科技股份有限公司 | Assembling method and device for bearing assembly of high-speed compressor and rotor assembly |
| CN117067152B (en) * | 2023-07-07 | 2024-03-01 | 苏州铁近机电科技股份有限公司 | Assembling method and device for bearing assembly of high-speed compressor and rotor assembly |
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Application publication date: 20190507 |