CN106475834B - A kind of method of lead screw shaft bearings centering - Google Patents

A kind of method of lead screw shaft bearings centering Download PDF

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Publication number
CN106475834B
CN106475834B CN201510535090.9A CN201510535090A CN106475834B CN 106475834 B CN106475834 B CN 106475834B CN 201510535090 A CN201510535090 A CN 201510535090A CN 106475834 B CN106475834 B CN 106475834B
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China
Prior art keywords
lead screw
indicator
shaft bearings
screw shaft
lathe
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CN201510535090.9A
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CN106475834A (en
Inventor
张伟伟
王玉成
张云
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Chengdu Aircraft Industrial Group Co Ltd
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Chengdu Aircraft Industrial Group Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means

Abstract

A kind of method that the present invention discloses lead screw shaft bearings centering, by placing indicator bracket at nut seat on the table, starting lathe makes workbench, the indicator reading being recorded on nut seat;It is adjusted: indicator bracket being adsorbed on lathe bed, dial gauge indicator contacts nut seat or screw seating face to be adjusted according to record;The fastening screw at position to be adjusted is loosened, so that it is generated displacement using jack or crowbar;Offset distance is set then to fasten the fastening screw at the position when identical with prior measurements;The adjustment of vertical direction: according to measurement result early period, unclamping the fastening screw at position to be adjusted, is added to below and is fastened with gasket;Start lathe check.Early-stage preparations tool of the present invention is few, it is only necessary to which preparing common dial gauge and dial framework can be detected;Spacing no requirement (NR) to guide rail and lead screw;Influenced by lead screw degree of disturbing it is smaller, detection process and lathe actually use in state it is identical;Measurement range is influenced smaller by nut seat.

Description

A kind of method of lead screw shaft bearings centering
Technical field
The invention belongs to machine upkeep technical fields, more particularly to the maintenance technology of lead screw.
Background technique
Lead screw is widely used in numerically-controlled machine tool, and it acts as the straight line fortune that the rotary motion of motor is changed into reference axis It is dynamic.With itself precision height, the high feature of assembly precision.The bearing block at lead screw both ends plays the role of positioning to lead screw, two bearings seat It is parallel and contour whether will directly affect the operating status of reference axis.When the bearing block at lead screw both ends is not parallel or contour, Angle will be generated with guide rail, be rotated in lead screw and ram is driven to generate jitter phenomenon when moving back and forth, the part of processing is caused to go out Existing ripple, the surface quality problems such as pit cause part unqualified, serious to will lead to part rejection, keep lathe normal It uses.Simultaneously because there is jitter phenomenon, each components of lathe itself can also be damaged, increase maintenance cost, acceleration equipment Aging.
For numerically-controlled machine tool is using unit, when needing to carry out lead screw bearings at both ends seat position detection and adjustment, because Workbench, the spindle box of each rectilinear coordinates are assembled in place, and lead screw is also mounted in bearing block, is such as dispatched from the factory using numerically-controlled machine tool Preceding detection method will dismantle these interference parts, and need to use special detection tool.Therefore the method generallyd use is in guide rail Upper installation sliding block, then indicator bracket is installed on sliding block, centering is carried out to the bearing block at lead screw both ends.Its technological difficulties is:
1) the early-stage preparations period is long, and tool preparation type is more, large labor intensity;
2) it is limited by indicator bracket range, lead screw distance guide rail 400MM or more can not then be detected;
3) it is influenced by lead screw ball grooves, it is larger to dial gauge impact, easily damage table dial gauge, it is right
Dial framework stability requirement is high;
4) it is influenced by lead screw degree of disturbing, test point can not be accurately positioned, and cause prohibited data detection true;
5) it is influenced by data inaccuracy, needs repeated detection, detection cycle is long;
6) it is influenced by nut seat, measurement range is limited.
The above technological difficulties keep the position detection early-stage preparations of lead screw shaft bearings cumbersome, and measurement period is long, low efficiency, labor Fatigue resistance is big, need to make specific purpose tool.
Fig. 1 is the currently used lead screw shaft bearings Y-direction method for detecting position carried out using guide rail, passes through the left and right of sliding block It is mobile, it moves left and right percentage list index at lead screw both ends, records data, using the foundation as adjustment bearing block.Using this Method, 1. need to disengage the connection of nut seat and workbench, and can be manually rotated lead screw is moved to nut seat on the right side of lead screw, detection adjustment There are problems that position is unable to precise restoration when finishing back dress;2. it is limited by indicator bracket range, it can only be between guide rail and lead screw Position detection is carried out away from the bearing block within 400MM;3. it is influenced when sliding block turns left side movement by lead screw surface ball grooves, Indicator is constantly impacted, higher to the stability requirement of indicator bracket, and entire measurement process constantly causes to damage to dial gauge Evil;4. being influenced when sliding block is moved left with shown position to lead screw by lead screw degree of disturbing, dial gauge can not accurately be determined when reaching left side Position causes measurement data inaccurate;5. the influence of examined data inaccuracy, needs repeated detection;6. nut seat occupies a part of silk Thick stick causes to measure Distance Shortened, and measurement error increases.
Fig. 2 is the currently used conventional lead screw shaft bearings Y-direction method for detecting position carried out using workbench, by manual The platform that pushes the work forward moves left and right, move left and right percentage list index at lead screw both ends, records data, using as adjustment bearing block Foundation.The shortcomings that this method includes all technology one, while because the platform that need to push the work forward manually moves back and forth, lead to physical demands Greatly.
Summary of the invention
In view of the above problems, the present invention provides a kind of aligning methods of lead screw shaft bearings quick and easy, accuracy is high.
A kind of method of lead screw shaft bearings centering of the present invention, step are as follows:
S1 unloads the leading screw protective cover of lathe, exposes lead screw;
S2 places indicator bracket at nut seat on the table, and the pointer of dial gauge is pressed in the straight table of lead screw Face;
S3, which starts lathe, moves closer to workbench from right end bearing block from the left end right side, record indicator reading;In workbench Arranged orthogonal indicator bracket at upper close nut seat;
The adjustment of S4 horizontal direction:
Indicator bracket is adsorbed on lathe bed by S41, and dial gauge indicator contacts screw seating face to be adjusted;
S42 loosens the fastening screw at position to be adjusted, so that it is generated displacement using jack or crowbar;It is on the move to see Percentage meter reading is examined, offset distance then fastens the fastening screw at the position when identical as measured value in step S3;
The adjustment of S5 vertical direction: according to the measurement result of step S3, gasket is made, it is inclined that spacer thickness size is equal to measurement Difference;
S51 unclamps the fastening screw at position to be adjusted, and the gasket made is added to below and is fastened;
S6 check: S2, S3 step are successively executed after adjustment, if there is bearing block and nut seat horizontal and vertical Alternate position spike in plane exceeds required precision, then repeatedly set-up procedure S4 and S5, until alternate position spike is within required precision.
In the present invention, in S2 step, when placing indicator bracket, pointer is pressed in the straight surface of lead screw, decrement is about 0.2MM, adjustment percentage list index make it be directed toward " 0 ".
In the present invention, in S2 step, when placing indicator bracket, in the mobile about 1MM of axis to be detected, observation pointer changes, such as Variable quantity is greater than 0.01 and readjusts percentage list index, until reading is less than 0.01;The operation is for eliminating percentage Watch Error.
In the present invention, indicator bracket and detection are both horizontally and vertically placed respectively.
In the present invention, S41 step, compression indicator 0.2MM or so rotates dial plate, pointer is made to be directed toward 0;Gently pull table Needle about 0.1MM and loosening springs back indicator, observed reading, as indicator can still carry out next step operation also if 0.
In the present invention, the support zone of S42 step jack or crowbar selects bed piece.
In the present invention, S51 step is made using steel material to prevent deformation from change in size occurs.
In the present invention, lathe permissible accuracy value is generally 0.1MM in S6 step.
In the present invention, dial gauge is moved to right from left end to right end in S3 step, should be back to left side initial position, such as pointer Being directed toward " 0 ", then above data is effective, if deviation is greater than 0.01, then detects again.
Technical solution of the present invention bring it is below the utility model has the advantages that
1) early-stage preparations tool is few, it is only necessary to which preparing common dial gauge and dial framework can be detected.Traditional detection method needs Prepare the sliding block to match with guide rail model, if model mismatch also needs to order again, increases detection cycle and cost;Sliding block makes It needs to clean roll inside body again after, increases the amount of labour and cost of upkeep;The early-stage preparations period is short, it is only necessary to disengage lead screw Shield, which exposes lead screw, to be detected, and labor intensity is small.Traditional detection method need to disengage shield, install and slide on guide rail Block also needs disassembly shield that could install sliding block, time is caused to increase, the amount of labour increases if guide rail and shield are interfered Greatly;
2) it can be detected using common indicator bracket, the spacing no requirement (NR) to guide rail and lead screw.In traditional detection In method, production specific purpose tool is then needed when lead screw and guide rail spacing are more than 400MM using the method for installing sliding block on guide rail Or extension bar could detect;
3) it is not influenced by the ball grooves on screw rod surface, drives movable workbench because lead screw rotates, dial gauge is mounted on work On platform, with workbench synchronizing moving, the relative position of dial gauge and screw rod is fixed.In traditional detection method, dial gauge is being examined Constantly by the impact of ball grooves during surveying, dial gauge easy to damage, and it is higher to the stability requirement of indicator bracket;Work as guide rail It is more than 400MM with lead screw spacing, when need to use specific purpose tool or extension bar, will lead to the increase and specific purpose tool or lengthening of length The overall stability requirement of bar is directly proportional, so that design, difficulty of processing increase;
4) influenced by lead screw degree of disturbing it is smaller, detection process and lathe actually use in state it is identical.Traditional detection method The middle connection that need to disengage nut seat and workbench causes lead screw that bearings at both ends seat is only leaned on to position, and larger degree of disturbing is generated among lead screw, For the lead screw of 3500MM long, maximum is up to 1.5MM;
5) high-precision for utilizing numerically-controlled machine tool, starts reference axis and detects to lead screw, easily realizes and is accurately positioned, makes to detect Data are accurate.Conventional method needs repeated detection, such as because lead screw and guide rail spacing are excessive, need to use special because being influenced by lead screw degree of disturbing With tool or extension bar, then simultaneously by the intensity and rigidity effects of specific purpose tool or extension bar;
6) measurement range is influenced smaller by nut seat, because nut seat is connect with workbench, when starting detection close to one end Lead screw shaft bearings, rigidity it is close with bearing block with intensity, it can be achieved that lead screw it is approximate whole process detect.Traditional detection method is by screw Seat is disengaged with workbench, and nut seat is moved to the lead screw other end, and disturbed degree influences, cannot when measuring degree of disturbing identical to left side It is further continued for detecting, detection range is caused to reduce, and can not be accurately positioned, in the biggish situation of degree of disturbing, obtained detection data Error is larger.
Detailed description of the invention
The conventional lead screw shaft bearings Y-direction method for detecting position that Fig. 1 is carried out using guide rail
Specific embodiment
Below with reference to example, this patent is further described.
The present invention rotates lead screw by starting lathe X-axis, screw the detection method of the Y-direction position of lead screw shaft bearings Seat drive workbench moves linearly, and percentage list index is moved to right end by lead screw left end, records data, using as adjustment bearing The foundation of seat.
Example:
The lead screw of certain lathe X-direction is detected, places dial gauge at nut seat on the table in lathe The thumb-ring needle of dial gauge is pressed in the straight surface of lead screw by frame
Starting lathe moves closer to workbench from right end bearing block from the left end right side, record indicator reading.
It was found that right end nut seat has in horizontal plane and error in vertical plane, horizontal plane location error reaches 0.3MM, vertical plane location error are 0.1MM.
The adjustment of horizontal direction, indicator bracket is adsorbed on lathe bed, and dial gauge indicator contacts nut seat table to be adjusted Face;It unclamps there are the right end bearing block fastening screw of error, is fastened after adjusting 0.3MM toward opposite direction with jack.
The set-up procedure of vertical direction is newly-increased 0.1MM sheetmetal, and cushioning is under bearing block.
Adjustment situation is detected, bearings at both ends seat and nut seat alternate position spike, in horizontal plane and vertical plane Within 0.1MM.Adjustment is completed.
The present invention passes through the movement of lathe rectilinear coordinates axis, carries out position to lead screw by workbench, spindle box or ram Detection is suitable for lead screw rotation and the non-rotary drive mechanism of lead screw.It can be by the indicator direction of change dial gauge, to lead screw two The parallel of end bearing block is detected with contour.Dial gauge can be replaced with to amesdial, lever indicator, dial test indicator etc. Detection instrument is detected.

Claims (9)

1. a kind of method of lead screw shaft bearings centering, step are as follows:
S1 unloads the leading screw protective cover of lathe, exposes lead screw;
S2 places indicator bracket at nut seat on the table, and the pointer of dial gauge is pressed in the straight surface of lead screw;
S3, which starts lathe, moves closer to workbench from right end bearing block from the left end right side, record indicator reading;It leans on the table Arranged orthogonal indicator bracket at nearly nut seat;
The adjustment of S4 horizontal direction:
Indicator bracket is adsorbed on lathe bed by S41, and dial gauge indicator contacts screw seating face to be adjusted;
S42 loosens the fastening screw at position to be adjusted, so that it is generated displacement using jack or crowbar;Observation on the move Percentage meter reading, offset distance then fasten the fastening screw at the position when identical as measured value in step S3;
The adjustment of S5 vertical direction: according to the measurement result of step S3, gasket is made, spacer thickness size is equal to measured deviation Value;
S51 unclamps the fastening screw at position to be adjusted, and the gasket made is added to below and is fastened;
S6 check: successively executing S2, S3 step after adjustment, if there is bearing block and nut seat horizontal and vertical flat Alternate position spike in face exceeds required precision, then repeatedly set-up procedure S4 and S5, until alternate position spike is within required precision.
2. a kind of method of lead screw shaft bearings centering according to claim 1, which is characterized in that in the S2 step, peace When putting indicator bracket, pointer is pressed in the straight surface of lead screw, decrement about 0.2MM, adjustment percentage list index makes its direction “0”。
3. a kind of method of lead screw shaft bearings centering according to claim 1, which is characterized in that in the S2 step, peace When putting indicator bracket, in the mobile about 1MM of axis to be detected, observation pointer variation readjusts percentage if variable quantity is greater than 0.01 List index, until reading is less than 0.01;The operation is for eliminating percentage Watch Error.
4. a kind of method of lead screw shaft bearings centering according to claim 1, which is characterized in that in water in the S2 step It square is detected to placing indicator bracket respectively with vertical direction.
5. a kind of method of lead screw shaft bearings centering according to claim 1, which is characterized in that the S41 step, pressure Contracting indicator 0.2MM or so rotates dial plate, and pointer is made to be directed toward 0;It gently pulls indicator about 0.1MM and loosening springs back indicator, see Reading is examined, as indicator can still carry out next step operation also if 0.
6. a kind of method of lead screw shaft bearings centering according to claim 1, which is characterized in that the S42 step is very heavy The support zone of top or crowbar selects bed piece.
7. a kind of method of lead screw shaft bearings centering according to claim 1, which is characterized in that the S51 step uses Steel material production is to prevent deformation from change in size occurs.
8. a kind of method of lead screw shaft bearings centering according to claim 1, which is characterized in that lathe in the S6 step Permissible accuracy value is generally 0.1MM.
9. a kind of method of lead screw shaft bearings centering according to claim 1, which is characterized in that percentage in the S3 step Table is moved to right from left end to right end, should be back to left side initial position, above data is effective if pointer is directed toward " 0 ", such as deviation Greater than 0.01, then detect again.
CN201510535090.9A 2015-08-27 2015-08-27 A kind of method of lead screw shaft bearings centering Active CN106475834B (en)

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Application Number Priority Date Filing Date Title
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CN106475834B true CN106475834B (en) 2019-03-29

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Publication number Priority date Publication date Assignee Title
CN109681604A (en) * 2019-01-09 2019-04-26 成都飞机工业(集团)有限责任公司 A kind of double lead-screw synchronization adjustment method

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GB763793A (en) * 1955-01-21 1956-12-19 John Oliver Creek And Edward W Direct reading linear-dimension gauge apparatus
CN201007640Y (en) * 2006-12-15 2008-01-16 大连机床集团有限责任公司 Shortcut type screw rod checking device
CN201016684Y (en) * 2006-12-23 2008-02-06 天水星火机床有限责任公司 Lathe bed guide rail precision checkout gear
CN102768003A (en) * 2012-05-28 2012-11-07 南通京鼎机械科技有限公司 Parallelism inspection tool for ball screw and guiding rail at gantry machining center
CN103084818B (en) * 2013-01-14 2015-07-22 苏州领创激光科技有限公司 Method and special rack capable of adjusting position of suspended beam screw rod to guide rail
CN203011289U (en) * 2013-01-16 2013-06-19 山东赛尔机械导轨有限公司 A precision detecting device of a linear guiderail pair
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