CN107626742A - A kind of guide rail centering leveling method - Google Patents
A kind of guide rail centering leveling method Download PDFInfo
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- CN107626742A CN107626742A CN201610562051.2A CN201610562051A CN107626742A CN 107626742 A CN107626742 A CN 107626742A CN 201610562051 A CN201610562051 A CN 201610562051A CN 107626742 A CN107626742 A CN 107626742A
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Abstract
The present invention relates to field of machining and machinebuilding technology, more particularly to a kind of tiny-tension reducing machine guide rail centering leveling method.Including preparation：Preparation tool, makes measurement column by oneself, and new guide rail sets top wire hole；C-type seat is cleared up, changes guide rail；By the 1st, middle root, last root guide rail leveling：Measure and record the longitudinally, laterally relative level degree error of above-mentioned guide rail, calculate above-mentioned guide rail levelness calculated value, the thickness of adjust pad needed for leveling, above-mentioned guide rail is added into corresponding thickness pad；By whole guide rail centering leveling：On the basis of first guide rail, with measurement column, by remaining guide rail centering, whole rail flatness errors are measured, calculate the spacer thickness needed for leveling, corresponding pad is added in guide rail bottom.Improved using the above method and change guide rail and centering, the operating efficiency of leveling, shorten the activity duration, saved human and material resources and improve production efficiency；Sizing stand of main engine c-type seat guide rail assembly precision is improved, so as to improve tube quality.
Description
Technical field
The present invention relates to field of machining and machinebuilding technology, more particularly to a kind of tiny-tension reducing machine guide rail centering leveling side
Method.
Background technology
Tiny-tension reducing machine realizes hollow forging tube reducing, sizing under Minimal Tension state, so as to obtain the finished product of plurality of specifications
Steel pipe, it is the primary deformable equipment on hot rolled seamless steel tube production line.Tiny-tension reducing machine includes sizing host C type seat with rolling
Roller frame, guide rail and location-plate is provided with sizing host C type seat, roll stand is provided with main guide rail plate, side rails plate and positioning
Block.Roll stand is arranged in sizing host C type seat, by hydraulic locking cylinder mode make main guide rail plate and guide rail, locating piece with
Location-plate is in close contact, with this ensure roll stand rolling center and sizing host C type seat rolling center registration error delta≤
0.15mm.Therefore rolling mill practice requires higher to the installation accuracy of sizing host C type seat guide rail and location-plate, rolling mill practice requirement
All guide rail apical side height difference Δ≤± 0.1mm.
There is more than ten guide rail in sizing host C type seat, changed once during annual overhaul under normal circumstances, way rub is serious
Cause rolling centerline registration error is larger will in particular cases be changed using overhauling or changing tool time.Generally
Guide rail centering uses the method that slide measure measures spacing between two neighboring guide rail one by one；Guide rail leveling is using level meter with putting down
Chi is engaged measures each guide rail both ends apical side height one by one, then calculates and adjust pad thickness is added needed for every guide rail both ends
Method by the leveling one by one of more than ten guide rails.Centering is carried out to guide rail using the above method, leveling has the disadvantage that：When for the first time
After guide rail leveling, more than ten guide rail apical side height difference result Δ >=± 0.1mm of repetition measurement, it is therefore desirable at least duplicate measurements, adjustment 3
It is secondary could be by more than ten guide rail whole leveling, more than ten guide rail centerings, leveling, which are needed to work continuously 64 hours, to be completed, work
Work amount is big, time-consuming.It is shorter due to overhauling or changing tool time, guide rail is changed every time and all causes to overhaul or change tool time prolongs
Long and guide rail centering, the precision of leveling do not reach technological requirement yet.
The content of the invention
In order to solve the deficiencies in the prior art, the present invention provides a kind of time saving, convenient, accurate sizing host C type seat and led
Rail centering leveling method, meet production technology required precision and increase substantially production efficiency.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of guide rail centering leveling method, specifically comprises the following steps：
(1) preparation：Preparation tool, makes measurement column by oneself, and new guide rail sets top wire hole；
(2) guide rail is changed：Former guide rail is removed, host C type seat is cleared up, new guide rail is installed；
(3) by the 1st, middle root, last root guide rail leveling：Measure and record above-mentioned guide rail longitudinally, laterally relative level
Spend error；Calculate above-mentioned guide rail levelness calculated value, the thickness of adjust pad needed for leveling；Above-mentioned guide rail is encased inside corresponding thickness
Pad, tighten joint bolt；
(4) by whole guide rail centering leveling：Whole rail flatness errors are measured, calculate the spacer thickness needed for leveling,
Corresponding pad, pretension guide rail joint bolt are added in guide rail bottom；By the 1st guide rail with being fastened after importing track alignment, with the 1st
Remaining guide rail is positioned in order with measurement column on the basis of root guide rail, fastening；All guide rail top surfaces are measured with 3 meters of leveling rulers, clearance gauge
The gap between leveling ruler bottom surface, if maximum gap≤0.1mm is as qualified.
The step (1) prepares following instrument：Linearity 0.02mm/M 3 meters of leveling rulers 1, the 1 of linearity 0.02mm/M
Rice leveling ruler 1,2, thickness 1mm gauge blocks, 1, the clearance gauge of precision 0.02mm/M frame level 1, most minimal thickness 0.05mm,
Thickness 0.05,0.1,0.2mm pad it is some, sanding machine, inner hexagon spanner, cotton yarn, washing oil.Make measurement column, both ends design by oneself
Into sphere, two spheres fixed point distance length matches with each guide rail spacing.Increase on each new guide rail 3 M12 top wire holes and
Each bolt hole top increases by 1 diameter 26mm, depth 18mm counterbore.
Step (2) the cleaning sizing host C type seat internal oxidition iron sheet, foul, cleaning, are checked, finishing sizing host C type
Seat in installation guide rail faying face, remove salient point the defects of.
The step (3) be first engaged with 1 meter of leveling ruler and frame level measure the 1st, middle root, last root guide rail
Vertical equity degree error and record；Laterally opposed horizontal gradient error between the 1st, middle root guide rail is measured again；It is first during measurement
Determine that a plan view erects 3 meters of leveling rulers by 3 points with 3 screw jack, measured afterwards with frame level, side is seen
Examine the adjustment of the bubble side on level meter screw jack height and measure each measurement point tolerance by leveling ruler leveling, then with inside micrometer
It is worth and records；Laterally opposed horizontal gradient error between middle root, last root guide rail is measured using same method.The 1st by
Root, middle root, last root guide rail add corresponding thickness pad, tighten joint bolt；Duplicate measurements afterwards, calculate, if 3 guide rails
Relative level degree error delta≤0.5mm, it is as qualified, otherwise continue plus, subtract pad and continue adjustment until qualified.
The step (4) places 1 1mm gauge block respectively on the 1st, middle root guide rail tail end, then 3 meters of leveling rulers are put
On two gauge blocks, the 2nd is measured to 1 guide rail top surface before middle root to gap between leveling ruler bottom surface with clearance gauge afterwards, and
Record measurement data；Repeat that gauge block and leveling ruler are placed on guide rail stage casing by above-mentioned steps, front end measures the 2nd, middle root afterwards
Preceding 1 guide rail top surface records measurement data to gap between leveling ruler bottom surface；Root to last root rail flatness misses among measurement
Difference, measuring method and measurement the 1st are identical to middle root rail flatness error approach.By the measured in step 1 the 1st to most
The each flatness error value of root guide rail subtracts gauge block thickness 1mm afterwards, that is, draws after the 2nd to 1 before middle root and middle root 1
Spacer thickness needed for 1 guide rail leveling before to last root；Spacer thickness is in above-mentioned guide rail as needed for each guide rail leveling calculated
Bottom adds corresponding pad, each guide rail joint bolt of pretension.With the measurement of 1 meter of leveling ruler by the 1st guide rail with import track alignment it
The joint bolt of the 1st guide rail is fastened afterwards；The 2nd guide rail is positioned with measurement column on the basis of the 1st guide rail and fastens connection
Screw is connect, afterwards in order by the positioning of remaining guide rail, fastening.3 meters of leveling rulers are directly placed on guide rail all with clearance gauge measurement
Gap between guide rail top surface and leveling ruler bottom surface, the maximum gap≤0.1mm such as measured, i.e., led used in the measurement of 0.1mm clearance gauges
Rail top surface arbitrfary point clearance gauge can't pass, then the top surface plane degree after whole guide rail adjustment is qualified.
Compared with prior art, the beneficial effects of the invention are as follows：
1) improve and change guide rail and centering, the operating efficiency of leveling, shorten the activity duration, save human and material resources and improve
Production efficiency；
2) sizing stand of main engine c-type seat guide rail assembly precision is improved, so as to improve tube quality.
Brief description of the drawings
Fig. 1 is the structural representation of measurement column of the present invention；
Fig. 2 is the new guide rail structure schematic diagram of the present invention；
Fig. 3 is the vertical equity degree error schematic diagram that the present invention is engaged measurement guide rail with 1 meter of leveling ruler with frame level；
Fig. 4 laterally opposed horizontal gradient error schematic diagrames between present invention measurement the 1st, middle root, last root guide rail；
Fig. 5 laterally opposed horizontal gradient error partial enlargements between present invention measurement the 1st, middle root, last root guide rail
Schematic diagram；
Fig. 6 measures the 1st to last rhizoplane degree error schematic diagram for the present invention；
Second guide rail is positioned schematic diagram by Fig. 7 on the basis of the 1st guide rail for the present invention with measurement column；
In figure：1- measurement column 2- top wire hole 3- frame level 4-1 rice leveling ruler 5- guide rail 6-3 rice leveling ruler 7- screw jack
8- inside micrometer 9- gauge block 10- clearance gauges
Embodiment
14 frame tiny-tension reducing machines are Anshan iron and steel plant Seamless Tube PlantsPrimary deformable on hot rolled seamless steel tube production line is set
It is standby, below in conjunction with the accompanying drawings using its sizing host C type seat guide rail centering leveling method as embodiment, to the specific embodiment party of the present invention
Formula elaborates：
The centering leveling of 15 guide rails 5 to sizing host C type seat, specifically comprises the following steps：
First, preparation：Preparation tool, makes measurement column 1 by oneself, and new guide rail 5 sets top wire hole 2.
1st, following instrument is prepared：Linearity 0.02mm/M 3 meters of leveling rulers 6,1, linearity 0.02mm/M 1 meter of leveling ruler 4,
1,9,2, thickness 1mm gauge blocks, precision 0.02mm/M frame level 3,1, most minimal thickness 0.05mm clearance gauge 10,1
, thickness 0.05,0.1,0.2mm pad it is some, sanding machine, inner hexagon spanner, cotton yarn, washing oil.
2nd, measurement column 1,2 is made by oneself, for convenience of measuring, the both ends of measurement column 1 are designed to sphere, and two spheres fixed point distance is
270.3±0.02mm。
3rd, 3 M12 top wire holes 2 are respectively increased on new 15 customized new guide rails 5 for convenience of the adjustment height of guide rail 5 and every
Individual bolt hole top increases by 1 diameter 26mm, and depth 18mm counterbore is, it is necessary to which being jacked up guide rail 5 with jackscrew when adding and subtracting pad makes
Gap is produced between guide rail 5 and support faying face to facilitate addition pad..
4th, whether measurement sizing host C type seat settles, measurement result host C type seat northwest corner sinking 0.89mm, therefore will lead
The thickness 42mm of rail 5 is changed to 41mm to ensure the adjustment height of guide rail 5.
2nd, guide rail 5 is changed：Original footpath host C type seat guide rail 5 is removed, host C type seat is cleared up, new guide rail 5 is installed.
1st, 15 guide rails 5 in host C type seat are removed；Clear up host C type seat internal oxidition iron sheet, foul；Clean, check,
The faying face of 15 guide rails 5 of installation in host C type seat is repaired, the defects of removing salient point.
The 2nd, 15 guide rails 5 are installed, the joint bolt of each guide rail 5 is tightened by regulation torque, it is desirable to each screw uniform force.
3rd, by the 1st, the 8th, the 15th leveling of guide rail 5.
As seen in figures 3-6, specific method of adjustment is as follows：
1st, the longitudinal direction for measuring the 1st, the 8th, the 15th guide rail 5 is first engaged with frame level 3 with 1 meter of leveling ruler 4
Horizontal gradient error simultaneously records.
The vertical equity degree error amount of 1st, the 8th, the 15th guide rail 5 see the table below：
| The position of guide rail 5 | The front end horizontal gradient error value (mm) of guide rail 5 | The tail end horizontal gradient error value (mm) of guide rail 5 |
| 1st | 0 | +0.26 |
| 8th | 0 | - 0.12 |
| 15th | 0 | +0.09 |
2nd, laterally opposed horizontal gradient error between the 1st, the 8th guide rail 5 is measured again.It is first very heavy with 3 spirals during measurement
Top 7 determines that a plan view erects 3 meters of leveling rulers 6 by 3 points, is measured afterwards with frame level 3, on side observation level meter
Bubble side adjust the height of screw jack 7 by leveling ruler leveling, then measure each measurement point error amount with inside micrometer 8 and remember
Record.Laterally opposed horizontal gradient error between 8th, the 15th guide rail 5 is measured using same method.
Laterally opposed horizontal gradient error value see the table below between 1st and the 8th guide rail 5：
Laterally opposed horizontal gradient error value see the table below between 8th and the 15th guide rail 5：
| The position of guide rail 5 | The front end relative level degree error amount (mm) of guide rail 5 |
| 8th front end of guide rail 5 | 0 |
| 15th front end of guide rail 5 | +0.48 |
3rd, the 1st, the 8th, the 15th levelness calculated value of guide rail 5 are calculated
I, the 1st front end measured value of guide rail 5 is set as zero point, then the tail end measured value of guide rail 5 is+0.26mm；
Ii, the low -0.12mm of the 8th zero point of guide rail 5 of the front end of guide rail 5 with respect to 1, then the tail end measured value of guide rail 5 be equal to (-
0.12)+(- 0.12)=- 0.24mm；
Iii, the 15th high 0.38mm of zero point of guide rail 5 of the front end of guide rail 5 with respect to 8, then the 15th front end of guide rail 5 is with respect to the 1st
The zero point of root guide rail 5 height (- 0.12)+(+0.48)=+ 0.36mm；Then the tail end measured value of guide rail 5 be equal to (+0.36)+(+0.09)=
+0.45mm；
1st, the 8th, the 15th levelness calculated value of guide rail 5 see the table below：
| The front end levelness calculated value (mm) of guide rail 5 | The tail end levelness calculated value (mm) of guide rail 5 | |
| 1st guide rail 5 | 0 | +0.26 |
| 8th guide rail 5 | - 0.12 | - 0.24 |
| 15th guide rail 5 | +0.36 | +0.45 |
4th, the 1st, the 8th, adjust pad thickness needed for the 15th leveling of guide rail 5 are calculated
I, set the 1st, the 8th, in the 15th guide rail 5 greatest measurement+0.45mm as 0, by be calculated the 1st,
The spacer thickness of 8th, the 15th leveling of guide rail 5 needs.
The spacer thickness of 1st, the 8th, the 15th leveling of guide rail 5 needs see the table below：
| The front end spacer thickness (mm) of guide rail 5 | The tail end spacer thickness (mm) of guide rail 5 | The stage casing spacer thickness (mm) of guide rail 5 | |
| 1st guide rail 5 | + 0.45-0=+0.45 | + 0.45- (+0.26)=+ 0.19 | (0.45+0.19)/2=0.32 |
| 8th guide rail 5 | + 0.45- (- 0.12)=+ 0.57 | + 0.45- (- 0.24)=+ 0.69 | (0.57+0.69)/2=0.63 |
| 15th guide rail 5 | + 0.45- (+0.36)=+ 0.09 | + 0.45- (+0.45)=0 | (0.09+0)/2=0.045 |
Ii, the 1st drawn after rounding piece, the spacer thickness of the 8th, the 15th leveling of guide rail 5 needs see the table below：
| The front end spacer thickness (mm) of guide rail 5 | The tail end spacer thickness (mm) of guide rail 5 | The stage casing spacer thickness (mm) of guide rail 5 | |
| 1st guide rail 5 | 0.45 | 0.2 | 0.3 |
| 8th guide rail 5 | 0.55 | 0.7 | 0.6 |
| 15th guide rail 5 | 0.1 | 0 | 0.05 |
5th, the 1st, the 8th, the 15th guide rail 5 are added into corresponding thickness pad by upper table, tightens joint bolt.Weigh afterwards
Multiple steps 1 and 2,3,4 pairs the 1st, the 8th, the 15th levelness of guide rail 5 progress duplicate measurements, calculating.As 3 guide rails 5 are relative
Horizontal gradient error δ≤0.5mm, it is as qualified, otherwise continue plus, subtract pad and continue adjustment until qualified.Because the 1st, the 8th
Root, the 15th be next step leveling 15 guide rails 5 of centering basis, so to its relative level degree require it is higher.
4th, as shown in fig. 6-7, by the whole centering leveling of 15 guide rails 5.
1st, the 1st to the 15th flatness error of guide rail 5 is measured, is placed respectively on the 1st, the 8th tail end of guide rail 5
1 1mm gauge block 9, then 3 meters of leveling rulers 6 are placed on above two gauge blocks 9.The 2nd to the 7th guide rail 5 is measured with clearance gauge 10 afterwards to push up
Face records measurement data to gap between leveling ruler bottom surface.Above-mentioned steps are repeated afterwards, and gauge block 9 and leveling ruler are placed on guide rail 5
Stage casing, front end measure the 2nd, the 7th top surface of guide rail 5 to gap between leveling ruler bottom surface, record measurement data.Measure the 8th extremely
15th flatness error of guide rail 5, the 1st to the 8th flatness error method of guide rail 5 of measuring method and measurement are identical.
2nd, spacer thickness needed for each leveling of guide rail 5 of calculating, the measured in step 1 the 1st to the 15th guide rail 5 is each put down
Face degree error amount subtracts the thickness 1mm of gauge block 9, that is, draws pad needed for the 2nd to the 7th and the 9th to the 14th leveling of guide rail 5
Thickness.
3rd, as needed for the leveling of each guide rail 5 calculated spacer thickness in the 2nd to the 7th and the 9th to the 14th guide rail 5
Bottom adds corresponding pad, each joint bolt of guide rail 5 of pretension.
4th, measured with 1 meter of leveling ruler 4 and the 1st guide rail 5 is fastened into coupling for the 1st guide rail 5 with importing after track alignment
Screw.
5th, the 2nd guide rail 5 is positioned with measurement column 1 on the basis of the 1st guide rail 5 and fastens joint bolt, afterwards by suitable
Remaining 13 guide rail 5 is positioned, fastened by sequence.
6th, 3 meters of leveling rulers 6 are directly placed on guide rail 5 and measured with clearance gauge 10 between all top surfaces of guide rail 5 and leveling ruler bottom surface
Gap.Maximum gap≤the 0.1mm such as measured, i.e., it is logical to measure the top surface arbitrfary point clearance gauge 10 of guide rail 5 used with 0.1mm clearance gauges 10
But, the top surface plane degree after 15 guide rails 5 adjust is as qualified.
Sizing host C type seat is installed at guide rail during design and guide rail bottom surface accurately processes 2 sections of 16 × 80A shape keyways,
Guide rail centering, leveling operating efficiency in sizing host C type seat can further be improved.
Guide rail centering, leveling operation in sizing host C type seat are carried out using the above method, is improved and is changed guide rail and look for
Just, the operating efficiency of leveling, activity duration were reduced to 16 hours from original 64 hours, met fast pace production requirement.Improve
Sizing stand of main engine c-type seat guide rail assembly precision, improve tube product quality.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (7)
1. a kind of guide rail centering leveling method, it is characterised in that specifically comprise the following steps：
(1) preparation：Preparation tool, makes measurement column by oneself, and new guide rail sets top wire hole；
(2) guide rail is changed：Former guide rail is removed, host C type seat is cleared up, new guide rail is installed；
(3) by the 1st, middle root, last root guide rail leveling：Measure and record above-mentioned guide rail longitudinally, laterally relative level degree mistake
Difference；Calculate above-mentioned guide rail levelness calculated value, the thickness of adjust pad needed for leveling；Above-mentioned guide rail is encased inside corresponding thickness pad
Piece, tighten joint bolt；
(4) by whole guide rail centering leveling：Whole rail flatness errors are measured, the spacer thickness needed for leveling is calculated, is leading
Flange of rail portion adds corresponding pad, pretension guide rail joint bolt；By the 1st guide rail with being fastened after importing track alignment, led with the 1st
Remaining guide rail is positioned in order with measurement column on the basis of rail, fastening；All guide rail top surfaces are measured with putting down with 3 meters of leveling rulers, clearance gauge
Gap between chi bottom surface, if maximum gap≤0.1mm is as qualified.
2. a kind of guide rail centering leveling method according to claim 1, it is characterised in that the step (1) prepares as follows
Instrument：Linearity 0.02mm/M 3 meters of leveling rulers 1, linearity 0.02mm/M 1 meter of leveling ruler 1,2, thickness 1mm gauge blocks, essence
Spend 0.02mm/M frame level 1,1, most minimal thickness 0.05mm clearance gauge, if thickness 0.05,0.1,0.2mm pad
It is dry, sanding machine, inner hexagon spanner, cotton yarn, washing oil.
A kind of 3. guide rail centering leveling method according to claim 1, it is characterised in that step (1) the self-control measurement
Post, both ends are designed to sphere, and two spheres fixed point distance length matches with each guide rail spacing；Increase by 3 M12 on each new guide rail
Top wire hole simultaneously increases by 1 diameter 26mm, depth 18mm counterbore on each bolt hole top.
4. a kind of guide rail centering leveling method according to claim 1, it is characterised in that the step (3) is first flat with 1 meter
Chi and frame level be engaged measure the 1st, middle root, last root guide rail vertical equity degree error and record；Survey again
Laterally opposed horizontal gradient error between flow control 1, middle root guide rail：First one is determined during measurement by 3 points with 3 screw jack
Individual plan view erects 3 meters of leveling rulers, is measured afterwards with frame level, and spiral thousand is adjusted in the bubble on observing level meter
Jin heights of roofs is by leveling ruler leveling, then measures each measurement point error amount with inside micrometer and record；Measured using same method
Go out laterally opposed horizontal gradient error between middle root, last root guide rail；Will in the 1st, middle root, last root guide rail add it is corresponding
Thickness pad, tightens joint bolt；Duplicate measurements afterwards, calculate, if 3 guide rail relative level degree error delta≤0.5mm, be
It is qualified, otherwise continue plus, subtract pad and continue to adjust, until qualified.
A kind of 5. guide rail centering leveling method according to claim 1, it is characterised in that the step (4) the 1st,
1 1mm gauge block is placed above middle root guide rail tail end respectively, then 3 meters of leveling rulers are placed on above two gauge blocks, is surveyed afterwards with clearance gauge
Flow control 2 records measurement data to 1 guide rail top surface before middle root to gap between leveling ruler bottom surface；Repeat afterwards above-mentioned
Gauge block and leveling ruler are placed on guide rail stage casing by step, front end measure the 2nd, before middle root 1 guide rail top surface between leveling ruler bottom surface
Gap, record measurement data；Root is extremely middle to last root rail flatness error, measuring method and measurement the 1st among measurement
Root rail flatness error approach is identical；Measured in step 1 the 1st to each flatness error value of last root guide rail is subtracted
Gauge block thickness 1mm, that is, draw pad needed for 1 to 1 guide rail leveling before last root after the 2nd to 1 before middle root and middle root
Piece thickness；Spacer thickness adds corresponding pad, each guide rail of pretension in above-mentioned guide rail bottom as needed for each guide rail leveling calculated
Joint bolt.
6. a kind of guide rail centering leveling method according to claim 1, it is characterised in that the step (4) is with 1 meter of leveling ruler
Measurement fastens the 1st guide rail with importing after track alignment the joint bolt of the 1st guide rail；On the basis of the 1st guide rail
The 2nd guide rail is positioned with measurement column and fastens joint bolt, afterwards in order by the positioning of remaining guide rail, fastening.
7. a kind of guide rail centering leveling method according to claim 1, it is characterised in that the step (4) is by 3 meters of leveling rulers
It is directly placed on guide rail with gap between all guide rail top surfaces of clearance gauge measurement and leveling ruler bottom surface, the maximum gap such as measured≤
0.1mm, i.e. the guide rail top surface arbitrfary point clearance gauge used in the measurement of 0.1mm clearance gauges be can't pass, then the top surface after whole guide rail adjustment is put down
Face degree is qualified.
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| CN108655721A (en) * | 2018-06-29 | 2018-10-16 | 江苏元利数控机床有限公司 | A kind of device and its application method of precise straightening the linear guide |
| CN108655721B (en) * | 2018-06-29 | 2023-10-31 | 江苏元利数控机床有限公司 | Device for precisely straightening linear guide rail and application method thereof |
| CN114770227A (en) * | 2022-04-12 | 2022-07-22 | 南京大量数控科技有限公司 | Method for manufacturing combined surface of PCB molding and drilling machine granite installation |
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| CN107626742B (en) | 2018-12-04 |
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