CN206847560U - A kind of microminiature ball screw assembly, journey error measurement apparatus - Google Patents
A kind of microminiature ball screw assembly, journey error measurement apparatus Download PDFInfo
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- CN206847560U CN206847560U CN201720699803.XU CN201720699803U CN206847560U CN 206847560 U CN206847560 U CN 206847560U CN 201720699803 U CN201720699803 U CN 201720699803U CN 206847560 U CN206847560 U CN 206847560U
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- supporting plate
- measurement
- head
- tailstock
- leading screw
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Abstract
The utility model discloses a kind of microminiature ball screw assembly, journey error measurement apparatus, including marble lathe bed and the head frame, tailstock, the measurement bay that are arranged on marble lathe bed；Head frame and tailstock clamp part to be measured, and driver plate and shift fork are housed on head frame, and driver plate drives shift fork motion to drive leading screw to rotate.The scale grating of Circular gratings is fixed on a frame, and indication grating rotates with driver plate, for measuring the angle of leading screw rotation.Measurement head on measurement bay moves along the helicla flute of leading screw, and measurement bay moves along a straight line along bed ways when leading screw rotates.The scale grating of long grating is fixed on lathe bed, and indication grating and measurement bay move together, for measuring the traveled distance of leading screw.Measuring instrument small volume, precision height, efficiency high, the automaticity of measurement apparatus of the present utility model are high, suitable for the detection of microminiature ball screw assembly, journey error.
Description
Technical field
The utility model belongs to field of measuring technique, particularly a kind of microminiature ball screw assembly, journey error measurement dress
Put.
Background technology
The measuring principle of screw travel error is more ripe, and by measuring the leading screw anglec of rotation, leading screw reason is calculated
By stroke, by leading screw theory stroke compared with measuring obtained traveled distance, the journey error of leading screw is obtained.At present, it is medium-and-large-sized
The journey error detecting system of ball screw assembly, is more complete, although the measurement range of journey error measuring instrument can adjust,
But the measurement for microminiature ball-screw is still restricted.In topology layout, existing detection means and microminiature ball
Leading screw is not suitable with；In software processing, microminiature ball-screw is also without special inspection software, it is necessary to debug.Using existing
Detection means measurement microminiature ball-screw efficiency is low, and precision is low, and limits more.
In summary, special equipment detection microminiature ball screw assembly, is had no at this stage, and existing detection means can not be accurate
Really measure its journey error.
Utility model content
The purpose of this utility model is to provide a kind of microminiature ball screw assembly, journey error measurement apparatus.
The technical solution for realizing the utility model purpose is：A kind of microminiature ball screw assembly, journey error measurement dress
Put, including the side setting head of marble lathe bed and head frame, tailstock and the measurement bay, wherein marble lathe bed that are arranged on lathe bed
Frame, the opposite side of marble lathe bed set tailstock, and measurement bay is located in the middle part of marble lathe bed, for being surveyed to tested leading screw
Measure, be connected scale grating on marble lathe bed；
Main shaft, Circular gratings, head frame top driver plate are set on the head frame, and wherein Circular gratings include scale grating and instruction light
Grid, driver plate and indication grating are cased with the main shaft of head frame, the scale grating of Circular gratings is fixed on a frame；The main shaft of head frame [1]
Upper setting head frame is top, and this frame is top coaxial with main shaft；
Tailstock center, center sleeve, iron chains steel bushing, gear shaft and handle are set on the tailstock；Be connected iron chains steel bushing on tailstock,
Center sleeve is set inside iron chains steel bushing, gear shaft is housed between iron chains steel bushing and center sleeve, for coordinating with the rack on center sleeve, hand
Handle is fixedly connected with gear shaft, and setting is top in center sleeve, and center sleeve stretches together in axial direction with top；
Indication grating, supporting plate, supporting plate, cam, support, guide sleeve and measurement head, supporting plate is set to be arranged on measurement bay
On the air-float guide rail of lathe bed, and it can be moved axially along air-float guide rail；Guide rail is housed on supporting plate, supporting plate is set on guide rail, is supported
Connecting screw on plate, screw rod are engaged with the cam on supporting plate, set spring between supporting plate and supporting plate, during cam rotation, spiral shell
Bar loses support, and under the pulling force of spring, supporting plate is drawn out, and the measurement bay in supporting plate is drawn out simultaneously, realizes measurement head
Quick from leading screw helicla flute exits；Dovetail guide is set in supporting plate, support is housed on dovetail guide, support can be in supporting plate
On moved along dovetail guide, mutually connected guide sleeve and measurement head are set on support, and guide sleeve rotates small built with minor leading screw
Screw mandrel is used for the radial displacement for adjusting measurement head.
During device work of the present utility model, head tailstock center clamping device clamping is tested leading screw, leading screw elder generation and head frame top
Point coordinates, and tailstock is moved by T-bolt in the T-slot of lathe bed, when adjustment position to leading screw is by stable holding, fixed tail
Frame；Support on measurement bay is connected with supporting plate by dovetail guide, and support adjusts footpath on the supporting plate by dovetail guide
It is fixed after solution space is reached to position；The knob of measurement head part on measurement bay is adjusted, the rotation of minor leading screw to be oriented to
Set is moved radially accordingly, and the radial position of measurement head is adjusted with this, it is ensured that measurement head is pasted with leading screw helicla flute central diameter
Close, the spring between minor leading screw and guide sleeve by compression due to producing initial tension of spring, and position is constant after keeping measurement head stress；
Switch is opened, electric motor operation, the mechanical reduction gear that electric machine main shaft is transmitted power in a frame by belt pulley, drives and dials
Disc spins, the shift fork on driver plate, which stirs leading screw, makes its synchronous rotary, and the indication grating of Circular gratings revolves with driver plate motion measurement leading screw
Gyration；Measurement head is located at leading screw helicla flute central diameter, and the rotation of leading screw drives measurement head to move along a straight line, the instruction light of long grating
Grid are connected with measurement bay, and scale grating is connected with lathe bed, the actual row of the air line distance, i.e. leading screw of measurable measurement bay motion
Journey；Grating signal is gathered by numbered card, and input computer carries out data processing, obtains the journey error of tested screw mandrel；Measurement
Supporting plate on frame is connected with supporting plate by guide rail, and be connected screw rod in supporting plate, and be connected cam on supporting plate, and screw rod connects with cam
Touch, supporting plate is equipped with spring, supporting plate is supported in spring tension and cam by the holding power of cam between supporting plate and supporting plate
Balanced in the presence of power, after measurement terminates, the cam on rotation measuring frame, supporting plate loses holding power, is acted in spring tension
Lower quickly to be pulled out, measurement head leaves leading screw helicla flute；Tailstock handle and gear shaft are connected, and have rack structure on center sleeve, turn
Fixed handle, center sleeve are quickly recalled under the cooperation of gear shaft and rack, and tailstock center quickly exits；Leading screw loses tailstock center
Support, can be unloaded easily.
Compared with prior art, its remarkable advantage is the utility model：1) measuring instrument of measurement apparatus of the present utility model
Device small volume, precision height, efficiency high, automaticity are high, suitable for the detection of microminiature ball screw assembly, journey error；2) originally
The device of utility model improves the measurement accuracy and measurement efficiency of microminiature ball-screw, solves the limitation of existing measurement apparatus
Sex chromosome mosaicism.
The utility model is described in further detail below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is microminiature ball screw assembly, journey error measurement apparatus general structure schematic diagram.
Fig. 2 is measurement apparatus head frame schematic diagram.
Fig. 3 is detection means measurement bay schematic diagram.
Fig. 4 is detection means tailstock schematic diagram.
Embodiment
With reference to accompanying drawing, a kind of microminiature ball screw assembly, journey error measurement apparatus of the present utility model, including marble
The side of lathe bed 2 and head frame 1, tailstock 4 and the measurement bay 3 being arranged on lathe bed, wherein marble lathe bed 2 sets head frame 1, Dali
The opposite side of stone lathe bed 2 sets tailstock 4, and measurement bay 3 is located at the middle part of marble lathe bed 2, for being measured to tested leading screw, greatly
Be connected scale grating 5-1 on reason stone lathe bed 2；
Main shaft 1-5, Circular gratings, head frame top 1-1 and driver plate 1-2 are set on the head frame 1, and wherein Circular gratings include scale
Driver plate 1-2 and indication grating 1-4, the scale light of Circular gratings are cased with grating 1-3 and indication grating 1-4, the main shaft 1-5 of head frame 1
Grid 1-3 is fixed on a frame；The top 1-1 of head frame is set on the main shaft 1-5 of head frame 1, the top 1-1 of this frame and main shaft are coaxial；
Tailstock center 4-1, center sleeve 4-2, iron chains steel bushing 4-3, gear shaft 4-5 and handle 4-4 are set on the tailstock 4；Tail
Be connected iron chains steel bushing 4-3, iron chains steel bushing 4-3 inside setting center sleeve 4-2 on stand, and tooth is housed between iron chains steel bushing 4-3 and center sleeve 4-2
Wheel shaft 4-5, for coordinating with the rack on center sleeve 4-2, handle 4-4 is fixedly connected with gear shaft 4-5, is set in center sleeve 4-2
Top 4-1, center sleeve 4-2 stretch together in axial direction with top 4-1；
Indication grating 5-2, supporting plate 3-4, supporting plate 3-5, cam 3-7, support 3-9, guide sleeve 3-2 are set on measurement bay 3
It is arranged on the air-float guide rail of lathe bed 2, and can be moved axially along air-float guide rail with measurement head 3-3, supporting plate 3-4；Filled on supporting plate 3-4
There is a guide rail, supporting plate 3-5 is set on guide rail, the cam 3-7 on supporting plate 3-5 on connecting screw 3-6, screw rod 3-6 and supporting plate 3-4
It is engaged, spring is set between supporting plate 3-4 and supporting plate 3-5, and when cam 3-7 is rotated, screw rod 3-6 loses support, in spring
Under pulling force, supporting plate 3-5 is drawn out, and the measurement bay 3 in supporting plate is drawn out simultaneously, realizes measurement head 3-3 from leading screw helicla flute
Quick exit；Dovetail guide 3-8 is set on supporting plate 3-5, support 3-9 is housed on dovetail guide 3-8, support 3-9 can propped up
Moved on fagging 3-5 along dovetail guide 3-8, mutually connected guide sleeve 3-2 and measurement head 3-3, guide sleeve are set on support 3-9
3-2 rotates the radial displacement that minor leading screw 3-1 is used to adjust measurement head 3-3 built with minor leading screw 3-1.
Wherein head frame 1, tailstock 4 are fully bonded with the contact portion of lathe bed 2, axle where head frame top 1-1 and tailstock center 4-1
Line is on a horizontal line.
The direction of motion of measurement bay 3 is parallel with head tailstock center line, and measurement head 3-3 measuring center is on frame top end to end
On sharp line.
The indication grating 1-4 installation centers of the Circular gratings overlap with the driver plate 1-2 centre of gyration.
The long grating is parallel with head tailstock center line, exist between indication grating 5-2 and scale grating 5-1 gap and
It is parallel.
Spring is also equipped with the guide sleeve 3-2, spring housing is on minor leading screw 3-1.
A kind of measuring method based on above-mentioned microminiature ball screw assembly, journey error measurement apparatus, comprises the following steps：
Step 1, tested leading screw one end and the top phase of head frame abutted, tested silk is fixed in position of the adjustment tailstock on lathe bed
The thick stick other end, complete the clamping of tested leading screw；
Step 2, measurement is placed on to leading screw helicla flute initiating terminal, moving radially for adjusting bracket and measurement head, makes measurement
Head is placed in leading screw helicla flute central diameter；
Step 3, the switch for opening measurement apparatus, industrial computer send instruction control electric motor operation, the motor shaft of motor
Driver plate is rotated by V belt translation and gear drive, driver plate is connected with indication grating, and when driver plate rotates, shift fork stirs leading screw at the uniform velocity
Rotation, indication grating turn over equal angular；
Step 4, leading screw rotation, the measurement head positioned at leading screw helicla flute central diameter are axially moved accordingly, indication grating
It is connected in synchronizing moving on measurement bay supporting plate；
Step 5, numbered card collect Circular gratings signal and long grating signal, obtain the leading screw anglec of rotation and traveled distance；
Step 6, computer are according to the leading screw anglec of rotation and traveled distance being collected into, it is determined that tested screw travel error.
Measuring instrument small volume, precision height, efficiency high, the automaticity of measurement apparatus of the present utility model are high, are applicable
In the detection of microminiature ball screw assembly, journey error.
Further detailed description is done to the utility model with reference to embodiment.
Embodiment
A kind of microminiature ball screw assembly, journey error measurement apparatus, including head frame, tailstock, measurement bay and lathe bed；Head frame
The tested leading screw of top and tailstock center clamping；Circular gratings are set in head frame, for measuring the leading screw anglec of rotation；Be connected mark on lathe bed
Chi grating, be connected on measurement bay corresponding indication grating, for measuring the axial movement distance of measurement bay；Above-mentioned parameter is via meter
The processing of calculation machine can obtain microminiature ball screw assembly, journey error.
Reference picture 1, a kind of microminiature ball screw assembly, journey error measurement apparatus, it is characterised in that including marble bed
The side of body and head frame, tailstock and the measurement bay being arranged on lathe bed, wherein marble lathe bed sets head frame, marble lathe bed
Opposite side sets tailstock, and measurement bay is located in the middle part of marble lathe bed, and for measuring tested leading screw, be connected scale on marble lathe bed
Grating；Lathe bed inclined-plane A, upper plane B, back side C are the mating surface for supporting frame end to end, and back side C is the perpendicular perpendicular to ground,
Upper plane B is in 102.5 ° with perpendicular, and inclined-plane A is in 102.5 ° with upper plane；Frame is top for head, the survey of tailstock center and measurement head
Amount is centrally located on same straight line；
Reference picture 2, main shaft, Circular gratings are set, head frame is top and driver plate, wherein Circular gratings include scale light on the head frame
Grid and indication grating, driver plate and indication grating are cased with the main shaft of head frame, scale grating is fixed on a frame；On the main shaft of head frame
Setting head frame is top, and this frame is top coaxial with main shaft；
Reference picture 3, tailstock center, center sleeve, iron chains steel bushing, gear shaft and handle are set on the tailstock；It is solid on tailstock
Even iron chains steel bushing, iron chains steel bushing inside set center sleeve, gear shaft are housed, for the tooth on center sleeve between iron chains steel bushing and center sleeve
Bar coordinates, and handle is fixedly connected with gear shaft, and setting is top in center sleeve, and center sleeve stretches together in axial direction with top；
Reference picture 4, indication grating, supporting plate, supporting plate, cam, support, guide sleeve and measurement head, support are set on measurement bay
Plate is arranged on the air-float guide rail of lathe bed, can be moved axially along air-float guide rail；Guide rail is housed on supporting plate, support is set on guide rail
Plate, connecting screw in supporting plate, screw rod are engaged with the cam on supporting plate, and spring is set between supporting plate and supporting plate, and cam turns
When dynamic, screw rod loses support, and under the pulling force of spring, the measurement bay in supporting plate and supporting plate is drawn out simultaneously, realizes measurement
Head quickly exits from leading screw helicla flute；Dovetail guide is set in supporting plate, support is housed on dovetail guide, support can support
Moved on plate along dovetail guide, mutually connected guide sleeve and measurement head are set on support, guide sleeve rotates built with minor leading screw
Minor leading screw can adjust the radial displacement of measurement head.
Wherein head frame, tailstock are fully bonded with lathe bed contact portion, and head frame is top and tailstock center place axis is located at one
On bar horizontal line.The measurement bay direction of motion is parallel with head tailstock center line, and the measuring center of measurement head connects in head tailstock center
On line.The indication grating installation center of Circular gratings overlaps with the centre of gyration of driver plate.Long grating is parallel with head tailstock center line,
Gap and parallel between indication grating and scale grating be present.Guide sleeve is built with spring, and for spring housing on minor leading screw, spring is pre-
Clamp force ensures that measurement head position is constant during work.
Reference picture 2, Fig. 3, described leading screw clamping device include that head frame is top and tailstock center, and head frame is top to be fixed on head
Coaxial with main shaft on frame main shaft, head frame is connected with lathe bed；Set top in center sleeve in tailstock, T-shaped spiral shell is set on tailstock
Bolt, T-bolt can move in the T-slot on lathe bed, after determining tailstock position according to the specific length of part to be measured, be pinched with locking
Hand fixes tailstock.
During work, head tailstock center clamping device clamping is tested leading screw, and leading screw is first and the top cooperation of head frame, tailstock pass through T
Type bolt moves in the T-slot of lathe bed, when adjustment position to leading screw is by stable holding, fixed tailstock；Support on measurement bay
Connected with supporting plate by dovetail guide, support adjusts radial position on the supporting plate by dovetail guide, waits to reach properly
It is fixed behind place；The knob of measurement head part on measurement bay is adjusted, the rotation of minor leading screw causes guide sleeve to carry out corresponding radial direction
It is mobile, the radial position of measurement head is adjusted with this, it is ensured that measurement head is bonded with leading screw helicla flute central diameter, minor leading screw and guide sleeve
Between spring due to by compression produce initial tension of spring, keep measurement head stress after position it is constant；Open switch, motor work
Make, the mechanical reduction gear that electric machine main shaft is transmitted power in a frame by belt pulley, drive driver plate to rotate, dialling on driver plate
Fork, which stirs leading screw, makes its synchronous rotary, and the indication grating of Circular gratings is with the driver plate motion measurement leading screw anglec of rotation；Measurement head is located at
Leading screw helicla flute central diameter, the rotation of leading screw drive measurement head to move along a straight line, and indication grating and the measurement bay of long grating are connected, mark
Chi grating is connected with lathe bed, the traveled distance of the air line distance, i.e. leading screw of measurable measurement bay motion；Grating signal passes through counting
Card collection, input computer carry out data processing, obtain the journey error of tested screw mandrel；Supporting plate and supporting plate on measurement bay are led to
Guide rail connection is crossed, be connected screw rod in supporting plate, and be connected cam, screw rod and cam contact on supporting plate, branch of the supporting plate by cam
Holding force, spring is housed between supporting plate and supporting plate, supporting plate balances in the presence of spring tension and cam holding power, measurement knot
Shu Hou, the cam on rotation measuring frame, supporting plate lose holding power, are quickly pulled out under spring tension effect, measurement head from
Open leading screw helicla flute；Tailstock handle and gear shaft are connected, and have rack structure on center sleeve, rotational handle, center sleeve is in gear shaft
Quickly recalled with the cooperation of rack, tailstock center quickly exits；Leading screw loses tailstock center support, can unload easily.
Device of the present utility model improves the measurement accuracy and measurement efficiency of microminiature ball-screw, solves existing measurement
The confinement problems of device.
Claims (6)
1. a kind of microminiature ball screw assembly, journey error measurement apparatus, it is characterised in that including marble lathe bed [2] and set
The side of head frame [1], tailstock [4] and measurement bay [3] on lathe bed, wherein marble lathe bed [2] sets head frame [1], Dali
The opposite side of stone lathe bed [2] sets tailstock [4], and measurement bay [3] is located in the middle part of marble lathe bed [2], for entering to tested leading screw
Row measures, and be connected scale grating [5-1] on marble lathe bed [2]；
Main shaft [1-5], Circular gratings, head frame top [1-1] and driver plate [1-2] are set on the head frame [1], and wherein Circular gratings include
Scale grating [1-3] and indication grating [1-4], driver plate [1-2] and indication grating [1- are cased with the main shaft [1-5] of head frame [1]
4], the scale grating [1-3] of Circular gratings is fixed on a frame；Set head frame top [1-1] on the main shaft [1-5] of head frame [1], should
Head frame top [1-1] and main shaft are coaxial；
Tailstock center [4-1], center sleeve [4-2], iron chains steel bushing [4-3], gear shaft [4-5] and handle are set on the tailstock [4]
[4-4]；Be connected iron chains steel bushing [4-3] on tailstock, and center sleeve [4-2], iron chains steel bushing [4-3] and top are set inside iron chains steel bushing [4-3]
Gear shaft [4-5] is housed between point set [4-2], for coordinating with the rack on center sleeve [4-2], handle [4-4] and gear shaft
[4-5] is fixedly connected with, and top [4-1] is set in center sleeve [4-2], and center sleeve [4-2] stretches together in axial direction with top [4-1]；
Indication grating [5-2], supporting plate [3-4] are set on measurement bay [3], supporting plate [3-5], cam [3-7], support [3-9], led
It is arranged on to set [3-2] and measurement head [3-3], supporting plate [3-4] on the air-float guide rail of lathe bed [2], and can be along air-float guide rail axial direction
It is mobile；Guide rail is housed on supporting plate [3-4], supporting plate [3-5] is set on guide rail, connecting screw [3-6] in supporting plate [3-5], spiral shell
Bar [3-6] is engaged with the cam [3-7] on supporting plate [3-4], and spring, cam are set between supporting plate [3-4] and supporting plate [3-5]
When [3-7] is rotated, screw rod [3-6] loses support, and under the pulling force of spring, supporting plate [3-5] is drawn out, the measurement in supporting plate
Frame [3] is drawn out simultaneously, realizes that measurement head [3-3] exits from the quick of leading screw helicla flute；Dovetail is set to lead in supporting plate [3-5]
Rail [3-8], support [3-9] is housed on dovetail guide [3-8], support [3-9] can be in supporting plate [3-5] along dovetail guide [3-
8] it is mobile, mutually connected guide sleeve [3-2] and measurement head [3-3] are set on support [3-9], and guide sleeve [3-2] is built with small
Screw mandrel [3-1], rotate the radial displacement that minor leading screw [3-1] is used to adjust measurement head [3-3].
2. microminiature ball screw assembly, journey error measurement apparatus according to claim 1, it is characterised in that wherein head frame
[1], tailstock [4] is fully bonded with lathe bed [2] contact portion, and axis where head frame top [1-1] and tailstock center [4-1] is located at
On one horizontal line.
3. microminiature ball screw assembly, journey error measurement apparatus according to claim 1, it is characterised in that measurement bay
[3] direction of motion is parallel with head tailstock center line, and the measuring center of measurement head [3-3] is on head tailstock center line.
4. microminiature ball screw assembly, journey error measurement apparatus according to claim 1, it is characterised in that Circular gratings
Indication grating [1-4] installation center overlaps with the centre of gyration of driver plate [1-2].
5. microminiature ball screw assembly, journey error measurement apparatus according to claim 1, it is characterised in that long grating with
Head tailstock center line is parallel, gap and parallel between indication grating [5-2] and scale grating [5-1] be present.
6. microminiature ball screw assembly, journey error measurement apparatus according to claim 1, it is characterised in that guide sleeve
Spring is also equipped with [3-2], spring housing is on minor leading screw [3-1].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720699803.XU CN206847560U (en) | 2017-06-16 | 2017-06-16 | A kind of microminiature ball screw assembly, journey error measurement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720699803.XU CN206847560U (en) | 2017-06-16 | 2017-06-16 | A kind of microminiature ball screw assembly, journey error measurement apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206847560U true CN206847560U (en) | 2018-01-05 |
Family
ID=60800582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720699803.XU Withdrawn - After Issue CN206847560U (en) | 2017-06-16 | 2017-06-16 | A kind of microminiature ball screw assembly, journey error measurement apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN206847560U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063102A (en) * | 2017-06-16 | 2017-08-18 | 南京理工大学 | A kind of microminiature ball screw assembly, journey error measurement apparatus |
| CN114894128A (en) * | 2022-05-13 | 2022-08-12 | 南京理工大学 | Lead screw raceway surface waviness check out test set |
-
2017
- 2017-06-16 CN CN201720699803.XU patent/CN206847560U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063102A (en) * | 2017-06-16 | 2017-08-18 | 南京理工大学 | A kind of microminiature ball screw assembly, journey error measurement apparatus |
| CN114894128A (en) * | 2022-05-13 | 2022-08-12 | 南京理工大学 | Lead screw raceway surface waviness check out test set |
| CN114894128B (en) * | 2022-05-13 | 2024-04-23 | 南京理工大学 | Lead screw raceway surface waviness detection equipment |
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