CN109916542A - Hand-held lathe ball screw assembly, friction torque on-line measurement device and method - Google Patents
Hand-held lathe ball screw assembly, friction torque on-line measurement device and method Download PDFInfo
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- CN109916542A CN109916542A CN201910220090.8A CN201910220090A CN109916542A CN 109916542 A CN109916542 A CN 109916542A CN 201910220090 A CN201910220090 A CN 201910220090A CN 109916542 A CN109916542 A CN 109916542A
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Abstract
The invention discloses a kind of hand-held lathe ball screw assembly, friction torque on-line measurement device and method, which includes the lead screw anti-rotation device for measuring the friction torque sensor of ball screw assembly, friction torque, for preventing ball screw assembly, from rotating and the handle for connecting friction torque sensor Yu lead screw anti-rotation device；Lead screw anti-rotation device is U-shaped structure, can be assembled with realizing without dismantling ball screw assembly, to be measured.Hand-held lathe of the present invention ball screw assembly, friction torque on-line measurement device and method, it solves the problems, such as that friction torque measurement can not be carried out to ball screw assembly, on lathe, has filled up the industry blank of ball screw assembly, friction torque on-line measurement device and method.Ball screw assembly, friction torque measuring device of the present invention is small in size, and method is simple and easy, improves ball screw assembly, friction torque measurement accuracy and measurement efficiency.
Description
Technical field
The invention belongs to ball screw assembly, performance test field, especially a kind of hand-held lathe is rubbed with ball screw assembly,
Torque on-line measurement device and method.
Background technique
The friction torque of ball screw assembly, refers to the resistance torque that various obstruction balls and guide screw movement friction factor are constituted,
It reflects the frictional behavior of ball screw assembly, is one of ball screw assembly, important performance, frequent in ball screw assembly, design
It is taken in as one of optimization aim.
Currently, the detection of friction torque is measured by static friction torque sensor, need in measurement in work
Make that pushing meanss are installed on platform.In lead screw rotation, pushing meanss give the push/pull power of working slider movement, by nut and work
It is kept completely separate as slide unit.A power transmission arm is connected on nut, the other end of power transmission arm rides over the dynamometer link of static torque sensor
On, friction torque is transmitted on torque sensor by limitation nut while being freely rotated.Device needed for this measurement method
Space occupied is big, and device is cumbersome, is not suitable for using under the measurement environment of operating condition complexity.Due to its structure when lathe in-site measurement
Feature can not install correlation meter, so the in-site measurement technology more vacancy of lathe friction torque.In addition, this survey
Amount method is to measure indirectly, and the data measured are not the friction torque values of ball screw assembly, itself, needs to come by theoretical calculation
It acquires, conversion needs to consider that the specific size of measurement structure, the end value being calculated are easy to produce error.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of lathe ball screw assembly, friction torque on-line measurement
Device and method improves the measurement accuracy and measurement efficiency of ball screw assembly, friction torque, solves existing measuring device limitation.
The technical solution for realizing the aim of the invention is as follows: a kind of hand-held lathe is online with ball screw assembly, friction torque
Measuring device, which is characterized in that including for measuring ball screw assembly, friction torque friction torque sensor, for preventing from rolling
The lead screw anti-rotation device that ballscrew pair rotates and the handle for connecting friction torque sensor Yu lead screw anti-rotation device；Lead screw
Anti-rotation device is U-shaped structure, can be assembled with realizing without dismantling ball screw assembly,；
Lead screw anti-rotation device is set on the nut flange of ball screw assembly, to be measured, one end connection lead screw anti-rotation dress of handle
It sets, the other end connects friction torque sensor.
Measurement method based on above-mentioned measuring device, comprising the following steps:
Step 1, the handle for adjusting measuring device are coplanar and coaxial with lead screw anti-rotation device and fasten, and adjust friction torque
It is parallel with the axis of ball screw assembly, to be measured that sensor makes its axis, and fastens friction torque sensor and handle；
The lead screw anti-rotation device of measuring device is caught at the nut flange of ball screw assembly, and fixation by step 2；
Friction torque sensor is connected industrial personal computer by step 3；
Step 4, the sensing part for holding friction torque sensor, and make to measure in ball screw assembly, operational process to be measured
Device is only axially moved along ball screw assembly, carries out the positive and negative friction of n times respectively to a certain batch m root ball screw assembly, to be measured
Torque measurement experiment, by the friction torque for the ball screw assembly, to be measured that industrial personal computer record measures；
Step 5, according to the friction torque for recording collected ball screw assembly, to be measured, obtain single ball screw assembly, to be measured
The deviation of the forward and reverse respective mean value of friction torque and forward and reverse friction torque evaluates single ball screw assembly, to be measured with this
Performance；Thus the forward and reverse friction torque intermediate value and deviation for obtaining batch ball screw assembly, to be measured again, reflect the batch with this
The dispersion degree of ball screw assembly, to be measured.
Compared with prior art, the present invention its remarkable advantage are as follows: 1) measuring device of the present invention is convenient for carrying, small in size, hand
Holding formula design can satisfy and measure under various working；2) present invention is solved and can not be rubbed to ball screw assembly, on lathe
The problem of torque in-site measurement, has filled up the blank of current lathe friction torque measuring device；3) ball screw assembly, of the present invention
Friction torque measuring device, method are simple and easy；4) present invention improves ball screw assembly, friction torque measurement accuracy and measurement
Efficiency.
The present invention is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is hand-held lathe ball screw assembly, friction torque on-line measurement schematic device of the present invention.
Specific embodiment
In conjunction with Fig. 1, hand-held lathe of the present invention ball screw assembly, friction torque on-line measurement device, including for measuring
The friction torque sensor 1 of ball screw assembly, friction torque, for prevent ball screw assembly, rotate lead screw anti-rotation device 3 and
For connecting the handle 2 of friction torque sensor 1 Yu lead screw anti-rotation device 3；Lead screw anti-rotation device 3 is U-shaped structure, to realize nothing
Ball screw assembly, to be measured, which need to be dismantled, to be assembled；
Lead screw anti-rotation device 3 is set on the nut flange of ball screw assembly, to be measured, and one end of handle 2 connects lead screw anti-rotation
Device 3, the other end connect friction torque sensor 1.
It is further preferred that the handle 2 is located at same level with lead screw anti-rotation device 3, and it is coaxially disposed.
It is further preferred that the axis of the friction torque sensor 1 is parallel with the axis of ball-screw to be measured.
Based on the above-mentioned hand-held lathe measurement method of ball screw assembly, friction torque on-line measurement device, including it is following
Step:
Step 1, the handle for adjusting measuring device are coplanar and coaxial with lead screw anti-rotation device and fasten, and adjust friction torque
It is parallel with the axis of ball screw assembly, to be measured that sensor makes its axis, and fastens friction torque sensor and handle；
The lead screw anti-rotation device of measuring device is caught at the nut flange of ball screw assembly, and fixation by step 2；
Friction torque sensor is connected industrial personal computer by step 3；
Step 4, the sensing part for holding friction torque sensor, and make to measure in ball screw assembly, operational process to be measured
Device is only axially moved along ball screw assembly, carries out the positive and negative friction of n times respectively to a certain batch m root ball screw assembly, to be measured
Torque measurement experiment, by the friction torque for the ball screw assembly, to be measured that industrial personal computer record measures；
Step 5, according to the friction torque for recording collected ball screw assembly, to be measured, obtain single ball screw assembly, to be measured
The deviation of the forward and reverse respective mean value of friction torque and forward and reverse friction torque evaluates single ball screw assembly, to be measured with this
Performance；Thus the forward and reverse friction torque intermediate value and deviation for obtaining batch ball screw assembly, to be measured again, reflect the batch with this
The dispersion degree of ball screw assembly, to be measured.
Further, it is obtained single described in step 5 according to the nut friction torque for recording collected ball screw assembly, to be measured
The deviation of the forward and reverse friction torque mean value of root ball screw assembly, to be measured and forward and reverse friction torque, specifically:
Step 5-1, according to the friction torque for recording collected ball screw assembly, to be measured, i-th ball wire to be measured is obtained
The positive friction torque mean value AVE of thick stick pair1i, reverse friction torque mean value AVE2iIt is respectively as follows:
In formula, AniFor i-th ball screw assembly, n-th forward direction friction torque value to be measured, A'niFor i-th ball wire to be measured
Thick stick pair n-th reverse friction torque value；Wherein, 1≤i≤m；
Step 5-2, the deviation δ of i-th ball screw assembly, forward direction friction torque and reverse friction torque to be measured is soughti, institute
With formula are as follows:
In formula, (AVE1i|, | AVE2i|)minIndicate | AVE1i| with | AVE2i| in minimum value.
Further, described in step 5 obtain batch ball screw assembly, to be measured forward and reverse friction torque intermediate value and partially
Difference, specifically:
Step 5-1 ', according to the respective positive friction torque mean value AVE of batch m root ball screw assembly, to be measured1i, reversely rub
Wipe torque mean value AVE2i, obtain the positive friction torque intermediate value A of batch ball screw assembly, to be measured1z, reverse friction torque intermediate value
A2zIt is respectively as follows:
In formula, (AVE1i)maxFor the maximum value in m root ball screw assembly, forward direction friction torque mean value to be measured, (AVE1i)min
For the minimum value in m root ball screw assembly, forward direction friction torque mean value to be measured, (AVE2i)maxIt is reversed for m root ball screw assembly, to be measured
Maximum value in friction torque mean value, (AVE2i)minFor the minimum value in m root ball screw assembly, reverse friction torque mean value to be measured；
Step 5-2 ', the positive friction torque mean value AVE according to all ball screw assembly,s to be measured of the batch1i, reverse friction
Torque mean value AVE2iAnd the A that step 5-1 ' is obtained1z、A2z, obtain batch ball screw assembly, forward direction friction torque deviation to be measured
A1p, reverse friction torque deviation A2pIt is respectively as follows:
Below with reference to embodiment, the present invention is described in further detail.
Embodiment
The handle that ball screw assembly, friction torque measuring device of the present invention includes friction torque sensor, is connected with sensor
And the lead screw anti-rotation device to connect with feed screw nut flange.In the present embodiment, friction torque sensor is using FUTEK's
TFF425 static torque sensor；Tested ball screw assembly, is 4010 lead screws.
Ball screw assembly, friction torque On-line Measuring Method of the invention, including the following contents:
1, the handle of adjustment measuring device is coplanar and coaxial with lead screw anti-rotation device and fastens, adjustment friction torque sensing
It is parallel with the axis of ball screw assembly, to be measured that device makes its axis, and fastens friction torque sensor and handle；
2, the lead screw anti-rotation device of measuring device is caught at the nut flange of ball screw assembly, and fixation；
3, friction torque sensor is connected into industrial personal computer；
4, the sensing part of friction torque sensor is held, and makes the measuring device in ball screw assembly, operational process to be measured
It is only axially moved along ball screw assembly, 4 positive and negative friction torques is carried out to single ball screw assembly, to be measured respectively and are measured in fact
It tests, by the friction torque for the ball screw assembly, to be measured that industrial personal computer record measures；
In the present embodiment, positive and negative four friction torques are carried out under the speed of 40r/min to single 4010 lead screw and are tested, are cut
Take partial data as shown in table 1 below:
1 friction torque data (NM) of table
| Positive first time | Positive second | Positive third time | It is 4th time positive | Reversed first time | Reversed second | Reversed third time | Reversed 4th time |
| 1.35 | 1.35 | 1.31 | 1.34 | -1.28 | -1.30 | -1.22 | -1.25 |
| 1.54 | 1.38 | 1.31 | 1.37 | -1.25 | -1.30 | -1.15 | -1.27 |
| 1.45 | 1.33 | 1.29 | 1.36 | -1.27 | -1.28 | -1.23 | -1.30 |
| 1.31 | 1.47 | 1.32 | 1.37 | -1.30 | -1.27 | -1.16 | -1.25 |
| 1.33 | 1.37 | 1.25 | 1.37 | -1.30 | -1.27 | -1.19 | -1.32 |
| 1.41 | 1.41 | 1.26 | 1.37 | -1.28 | -1.26 | -1.19 | -1.28 |
| 1.41 | 1.38 | 1.24 | 1.36 | -1.38 | -1.24 | -1.16 | -1.34 |
| 1.38 | 1.35 | 1.23 | 1.34 | -1.30 | -1.21 | -1.18 | -1.34 |
| 1.43 | 1.38 | 1.24 | 1.37 | -1.33 | -1.23 | -1.18 | -1.33 |
| 1.42 | 1.38 | 1.19 | 1.34 | -1.25 | -1.22 | -1.16 | -1.32 |
| 1.46 | 1.41 | 1.16 | 1.38 | -1.30 | -1.24 | -1.20 | -1.28 |
| 1.44 | 1.36 | 1.20 | 1.38 | -1.28 | -1.24 | -1.18 | -1.29 |
| 1.52 | 1.40 | 1.23 | 1.40 | -1.40 | -1.28 | -1.18 | -1.29 |
| 1.47 | 1.38 | 1.25 | 1.39 | -1.31 | -1.26 | -1.15 | -1.33 |
| 1.52 | 1.48 | 1.15 | 1.39 | -1.32 | -1.31 | -1.17 | -1.27 |
| 1.29 | 1.37 | 1.13 | 1.40 | -1.28 | -1.24 | -1.16 | -1.34 |
| 1.36 | 1.42 | 1.10 | 1.41 | -1.26 | -1.25 | -1.17 | -1.27 |
Take mean value as lead screw one way friction torque value data, obtaining the positive first time friction torque of tested lead screw is
1.42NM, positive second of friction torque are 1.39NM, and positive third time friction torque is 1.23NM, 4th time positive
Friction torque is 1.37NM, and reversed first time friction torque is -1.30NM, and reversed second of friction torque is -1.26N
M, reversed third time friction torque are -1.18NM, and reversed 4th friction torque is -1.30NM.
5, collected data are handled, obtains the forward and reverse mean value of single lead screw friction torque and deviation, calculated public
Formula are as follows:
It is calculated in the present embodiment and obtains AVE1iIt is 1.35；AVE2iIt is -1.26；δiIt is 7.14%.
Single lead screw friction torque deviation should meet E12 clause requirement in GBT17587.3, and maximum deviation requires control to exist
In 30%, it is known that tested lead screw meets the requirement.It is comprehensive that the forward and reverse mean value of friction torque and deviation can be used as evaluation ball-screw
Close one of performance, inflexible target.
Hand-held lathe of the present invention ball screw assembly, friction torque on-line measurement device and method, solves on lathe
Can not to ball screw assembly, carry out friction torque measurement the problem of, filled up ball screw assembly, friction torque on-line measurement device and
The industry blank of method.Ball screw assembly, friction torque measuring device of the present invention is small in size, and method is simple and easy, improves rolling
Ballscrew pair friction torque measurement accuracy and measurement efficiency.
Claims (6)
1. a kind of hand-held lathe ball screw assembly, friction torque on-line measurement device, which is characterized in that including for measuring
The friction torque sensor (1) of ball screw assembly, friction torque, the lead screw anti-rotation device (3) for preventing ball screw assembly, from rotating
And the handle (2) for connecting friction torque sensor (1) Yu lead screw anti-rotation device (3)；Lead screw anti-rotation device (3) is U-shaped
Structure can be assembled with realizing without dismantling ball screw assembly, to be measured；
Lead screw anti-rotation device (3) is set on the nut flange of ball screw assembly, to be measured, and one end of handle (2) connects lead screw anti-rotation
Device (3), the other end connect friction torque sensor (1).
2. hand-held lathe according to claim 1 ball screw assembly, friction torque on-line measurement device, feature exist
In the handle (2) and lead screw anti-rotation device (3) are located at same level, and are coaxially disposed.
3. hand-held lathe according to claim 1 ball screw assembly, friction torque on-line measurement device, feature exist
In the axis of the friction torque sensor (1) is parallel with the axis of ball-screw to be measured.
4. based on the measurement method of ball screw assembly, friction torque on-line measurement device of hand-held lathe described in claim 1,
Characterized by comprising the following steps:
Step 1, the handle for adjusting measuring device are coplanar and coaxial with lead screw anti-rotation device and fasten, adjustment friction torque sensing
It is parallel with the axis of ball screw assembly, to be measured that device makes its axis, and fastens friction torque sensor and handle；
The lead screw anti-rotation device of measuring device is caught at the nut flange of ball screw assembly, and fixation by step 2；
Friction torque sensor is connected industrial personal computer by step 3；
Step 4, the sensing part for holding friction torque sensor make the measuring device in ball screw assembly, operational process to be measured
It is axially moved along ball screw assembly, the positive and negative friction torque of n times is carried out to a certain batch m root ball screw assembly, to be measured respectively and is surveyed
Amount experiment, by the friction torque for the ball screw assembly, to be measured that industrial personal computer record measures；
Step 5, according to the friction torque for recording collected ball screw assembly, to be measured, obtain single ball screw assembly, to be measured just,
The deviation of the respective mean value of reverse friction torque and forward and reverse friction torque evaluates the property of single ball screw assembly, to be measured with this
Energy；Thus the forward and reverse friction torque intermediate value and deviation for obtaining batch ball screw assembly, to be measured again, reflect that the batch waits for this
Survey the dispersion degree of ball screw assembly,.
5. hand-held lathe according to claim 4 ball screw assembly, friction torque On-line Measuring Method, feature exist
According to the nut friction torque for recording collected ball screw assembly, to be measured, the single ball-screw to be measured of acquisition described in step 5
The deviation of secondary forward and reverse friction torque mean value and forward and reverse friction torque, specifically:
Step 5-1, according to collected ball screw assembly, friction torque to be measured is recorded, i-th ball screw assembly, to be measured is obtained
Positive friction torque mean value AVE1i, reverse friction torque mean value AVE2iIt is respectively as follows:
In formula, AniFor i-th ball screw assembly, n-th forward direction friction torque value to be measured, A'niFor i-th ball screw assembly, to be measured
N-th reverse friction torque value；Wherein, 1≤i≤m；
Step 5-2, the deviation δ of i-th ball screw assembly, forward direction friction torque and reverse friction torque to be measured is soughti, formula used
Are as follows:
In formula, (| AVE1i|, | AVE2i|)minIndicate | AVE1i| with | AVE2i| in minimum value.
6. hand-held lathe according to claim 5 ball screw assembly, friction torque On-line Measuring Method, feature exist
In, the forward and reverse friction torque intermediate value and deviation of batch ball screw assembly, to be measured are obtained described in step 5, specifically:
Step 5-1 ', according to the respective positive friction torque mean value AVE of batch m root ball screw assembly, to be measured1i, reverse friction turn round
Square mean value AVE2i, obtain the positive friction torque intermediate value A of batch ball screw assembly, to be measured1z, reverse friction torque intermediate value A2zPoint
Not are as follows:
In formula, (AVE1i)maxFor the maximum value in m root ball screw assembly, forward direction friction torque mean value to be measured, (AVE1i)minFor m root
Minimum value in ball screw assembly, forward direction friction torque mean value to be measured, (AVE2i)maxFor m root ball screw assembly, reverse friction to be measured
Maximum value in torque mean value, (AVE2i)minFor the minimum value in m root ball screw assembly, reverse friction torque mean value to be measured；
Step 5-2 ', the positive friction torque mean value AVE according to all ball screw assembly,s to be measured of the batch1i, reverse friction torque
Mean value AVE2iAnd the A that step 5-1 ' is obtained1z、A2z, obtain batch ball screw assembly, forward direction friction torque deviation A to be measured1p、
Reverse friction torque deviation A2pIt is respectively as follows:
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