CN104259933A - Ball nut phase measuring device and corresponding nut return device hole machining method - Google Patents
Ball nut phase measuring device and corresponding nut return device hole machining method Download PDFInfo
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- CN104259933A CN104259933A CN201410449293.1A CN201410449293A CN104259933A CN 104259933 A CN104259933 A CN 104259933A CN 201410449293 A CN201410449293 A CN 201410449293A CN 104259933 A CN104259933 A CN 104259933A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/20—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a ball nut phase measuring device. The device can be used for detecting the phase angle and the axial position of a thread raceway in return device hole machining, and accordingly the location degree of the thread raceway and the return device hole is guaranteed. The ball nut phase measuring device mainly and structurally comprises a connection shaft 1, a linear guide rail 2, a sliding block 3, a connection plate 4, a pressing plate 5, a measuring rod 6, a ball-shaped measuring head 7, a supporting block 8, a connection block 9, a spring 10, a meter frame 11 and a dial indicator 12. The connection shaft 1, the guide rail 2, the supporting block 8 and the connection block 9 are fixed in position. The sliding block 3, the connection plate 4, the pressing plate 5, the measuring rod 6 and the ball-shaped measuring head 7 are fixed in position. Meanwhile, a whole capable of moving in the direction of the guide rail is formed. The invention further discloses a nut return device hole machining method achieved by means of the ball nut phase measuring device and a vertical machining center, and an inner circulating nut and an outer circulating nut are included.
Description
Technical field
The present invention relates to a kind of phase measurement device of ball nut screw thread raceway.At the processing link in ball nut reverser hole, by detecting phase angle and the axial location of screw thread raceway, the Working position in reverser hole can be determined, thus guarantee the position degree in screw thread raceway and reverser hole.This device is applicable to the phase measurement of Inner eycle, outer circulation and end face circulation nut screw thread raceway.
Background technology
Ball screw assembly, is rolling element with ball between leading screw and nut, and leading screw is rotated through ball drive nut moving linearly, or the drive disk assembly that nut rectilinear motion drives leading screw to rotate by ball.Ball screw assembly, not only can transmit power, and can realize the accurate location of rectilinear direction.Therefore, ball screw assembly, is widely used in the equipment such as Digit Control Machine Tool, industrial robot.
As shown in Figure 10, ball screw assembly, comprises the major parts such as ball-screw 101, ball nut 102, reverser 103.Wherein, ball nut is the part that in ball screw assembly, structure is the most complicated, is also to a maximum part of the performance impacts such as ball screw assembly, noise, temperature rise simultaneously.
As shown in figure 11, ball nut has screw thread raceway 201 and reverser hole 202, two center lines and the pitch circle intersection point (203) in reverser hole must meet the following conditions: the first, and on along nut axis direction to helix, the distance of point of proximity is the half of helical pitch; The second, after nut axis rotates 180 °, be just in time on helix.When only having reverser hole to meet above-mentioned condition, reverser is installed to after on nut, and the interface of bead returning groove and screw thread raceway is only correct, as shown in figure 12.In Figure 12,301 is nut, and 302 is reverser.
For a long time, ball nut adopts the process of first milling reverser hole then cutting thread raceway.In the turning process of ball screws, workman is according to the visual value of reverser hole and screw thread raceway position, and what adjust cutted thread plays cutter point, the i.e. initial phase angle of screw thread.This method not only error is large, and the processing of cutted thread belongs to interrupted cut, and efficiency is lower, also easily collapses cutter.
Error excessive between ball screws and reverser hole directly causes assembling rear reverser bead returning groove and excessive step appears in screw thread raceway interface.In operation process, when ball passes through herein, because collision will produce the fluctuation of larger noise and moment of torsion.At present, this problem has become the principal element of restriction ball screw assembly, performance boost.
Summary of the invention
The object of this invention is to provide a kind of structure simple, easy to operate, on ball nut, determine reverser hole site ball nut screw thread raceway phase measurement device accurately, improve working (machining) efficiency, overcome the deficiencies in the prior art.
Ball nut screw thread raceway phase measurement device of the present invention, major mechanical structure comprises: connecting axle, line slideway, slide block, connecting plate, pressing plate, measuring staff, spheric probe, back-up block, contiguous block, spring, dial framework, dial gauge; The relative position of connecting axle, guide rail, back-up block, contiguous block immobilizes; The relative position of slide block, connecting plate, pressing plate, measuring staff, gauge head immobilizes, and this part forms the entirety can moved along guide rail direction simultaneously.
Described spring keeps pulling force downward for moving part; In measurement, under the effect of spring tension, spheric probe all the time with raceway EDGE CONTACT; When not measuring, under spring force, connecting plate contacts with back-up block.
Be connected by screw together between described dial framework and dial gauge, dial framework have long waist shaped groove, can for dial framework along adjustment position, guide rail direction; In measurement, according to the depth of tested screw thread raceway, need to adjust dial framework, the requirement of adjustment makes dial gauge in its range.
Utilize ball nut screw thread raceway phase measurement device to detect the method for the phase place of reverser hole in screw thread raceway of Inner eycle nut, step is as follows:
A) phase measurement device is arranged on vertical machining centre main shaft;
B) nut is arranged on vertical machining centre A axle chuck;
C) adjust probe location, make gauge head at lathe Y-axis and nut center superposition, gauge head is positioned at center, reverser hole in X-axis, and gauge head moves one end distance in Z-direction, still has the trend of moving down when making gauge head be positioned at cunette;
D) rotate lathe A axle, observe dial gauge numerical value, when dial gauge numerical value is maximum, the position on gauge head opposite is center, reverser hole.
Utilize ball nut screw thread raceway phase measurement device to detect the method leading the phase place of pearl pore in screw thread raceway of outer circulation nut, it is characterized in that: step is as follows:
A) phase measurement device is arranged on vertical machining centre main shaft;
B) nut is arranged on vertical machining centre A axle chuck;
C) adjust probe location, make gauge head at lathe Y-axis and nut center superposition;
D) gauge head is in the position of X-axis, and namely gauge head center calculates in two kinds of situation at the distance L of nut axis direction to its right end face, the first, lead the pearl pipe circulation number of turns be 1.5 circles or 3.5 circle time, L as shown in the formula:
The second, when to lead the pearl pipe circulation number of turns be 2.5 circle, L as shown in the formula:
In above formula, A, B numerical value is shown in Fig. 9, and Ph is the helical pitch of ball screw assembly, n be integer (n=0, ± 1, ± 2, ± 3 ...), the length that the value of n can put in nut by measuring staff is determined;
E) gauge head moves one end distance in Z-direction, still has the trend of moving down when making gauge head be positioned at cunette;
F) rotate lathe A axle, observe dial gauge numerical value, when dial gauge numerical value is maximum, the position on gauge head opposite is the outer round flat Working position of nut.
Measurement mechanism of the present invention, overall structure is simple, easy to operate, determines that reverser hole site is more accurate, further increases the position degree in ball nut screw thread raceway and reverser hole, improve the working (machining) efficiency of nut.
Accompanying drawing explanation
Fig. 1 is the front view of phase measurement device.
Fig. 2 is the left view of phase measurement device Fig. 1.
Fig. 3 is the ball nut in reverser hole to be processed.
Fig. 4 is the application schematic diagram of phase measurement device.
Fig. 5 is the position view in ball nut reverser hole.
Fig. 6 is the gauge head of phase measurement device and the relative position relation figure of raceway, a is that gauge head is positioned at schematic diagram on the left of raceway, and b is that gauge head is positioned at the RC schematic diagram of raceway, and c is that gauge head is positioned at raceway right side schematic view.
Fig. 7 is dial framework schematic diagram.
Fig. 8 is outer circulation nut sectional view.
Fig. 9 is the top view of Fig. 8.
Figure 10 is ball screw assembly, schematic diagram.
Figure 11 is ball nut profile.
Figure 12 is the sectional view that reverser is arranged in nut.
Detailed description of the invention
The detailed description of the invention of apparatus of the present invention is described below in conjunction with accompanying drawing.
The connecting axle of apparatus of the present invention is as shown in Fig. 11, the upper end column part of axle is used to be connected with main shaft handle of a knife, lower end is connected with guide rail, due to needs regular dismounting, and cylindrical portion branch is subject to larger clamping force, so connecting axle has selected high-quality low-carbon alloy structural steel to add Quenching Treatment through over carburizing.Therefore connecting axle installation blessing part has interior tough outer hard feature.
No. 2 parts in Fig. 1 are that high-accuracy rolling linear guide rail is secondary, and linear rolling guide has the advantages such as precision is high, frictional force is little.Owing to being measure use, the load suffered by guideway is very little, and requires in measuring process that between slide block and guide rail, motion flexibly, so guideway answers the pretightning force of selection of small.Guide rail is fixed on connecting axle with the screw in front and the pressing plate of side.Guide rail lower end machined three screwed holes, indicator bracket 11 and guide rail is fixed together by bolt.Slide block 3 there is the screwed hole installed; screwed hole is used for fixing connecting plate 4; during fixed connecting plate; its right flank must contact with the reference side of slide block 3; plane broad in the middle contacts with the upper end face of slide block; and side jackscrew holds out against, to guarantee that the reference side of slide block contacts with connecting plate right flank.
The function of measuring staff be gauge head 7 is transmitted come be displaced through connecting plate 4 and slide block 3 passes to dial gauge, in order to reduce the error in this link, measuring staff needs very high rigidity, therefore have selected high carbon chromium steel alloy, and the Quenching Treatment adopted, makes its hardness reach more than HRC64.Simultaneously under the condition meeting measurement category by short as far as possible for the total length of measuring staff.
Gauge head 7 in measuring process with nut rolling way or contact internal walls, along with the rotation of nut, gauge head is relative to the position relationship be rolled into as shown in Figure 6.Be sliding friction between gauge head and raceway, gauge head must possess enough hardness and wearability, therefore the Material selec-tion wearability good carbide alloy of gauge head.Can not be there is situation about loosening in gauge head, right screw must be tightened when mounted.During measurement, for avoiding the error brought of creeping because of gauge head, moderate lubrication oil should be smeared on gauge head.
Contiguous block 9 is used to install back-up block 8, spring 10 and dial framework 11, and in whole measuring process, contiguous block remains static.Contiguous block uses common middle carbon high-quality structural steel, forms through modifier treatment aft-loaded airfoil.On the right side of contiguous block, the back-up block 8 of a nylon material has been installed in top, and back-up block two screws are fixed on contiguous block.The effect of back-up block is support slipper.During owing to not working, slide block has the trend moved downward under the effect of gravity and spring tension, if do not have the flexible support of back-up block, dial gauge may damage by slide block and moving part thereof.
The effect of spring 10 is pulled down slide block and moving part thereof.In the process measured, gauge head needs lasting downward movement tendency, could find the Working position in reverser hole like this in the process of rotating nut from the change procedure of dial gauge.
Dial gauge 12 is fixed together by screw and dial framework 11.Dial framework 11 adopts carbon structural steels to form through modifier treatment aft-loaded airfoil.Dial framework 11 there is long waist shaped groove, as shown in Figure 7.The relative position of dial framework and contiguous block is adjustable, and namely the position of dial gauge can along the adjustment position, direction of line slideway.
The size of spheric probe is consistent with raceway profile of tooth, and namely gauge head size is identical with the ball size that ball screw assembly, uses.
This measurement mechanism can be installed on machining center or turnning and milling complex centre main shaft, and to be described with the vertical machining centre of rotating shaft A axle, this device is installed to need to adjust gauge head at X to, the position of Y-direction, Z-direction after on main shaft.First to need gauge head, along perpendicular to the direction of nut axis and the Y-direction of lathe, to be adjusted to nut central plane.Secondly, need spheric probe along the X of nut axis direction and lathe to A place, position shown in mobile Fig. 5.Then gauge head is moved down a segment distance along Z axis, when displacement should make gauge head contact raceway cunette position, gauge head under spring force, still has the trend necessarily moved down.Adjust lathe A axle afterwards, i.e. nut rotating shaft, and observe the change of dial gauge.In this process, the change in location of gauge head in raceway as shown in Figure 6.The numerical value of dial gauge will change from small to big, more from large to small, and so forth.When dial gauge display maximum, gauge head is just in time in center position in raceway, as shown in Figure 6.Now, be positioned at the center that gauge head 180 degree of nut location places are reverser hole, then can by processing reverser hole, this position.
The position on opposite, center, Inner eycle nut reverser hole is be just in time the center of screw thread raceway, so when measuring, gauge head nut shaft to position should be consistent with the A in Fig. 5.
Apparatus of the present invention also can be applicable to outer circulation nut.Outer circulation nut is after the finish turning completing cylindrical, endoporus, end face and screw thread raceway, and available apparatus of the present invention measure the position of outer disk, as shown in Figure 8.Can process leading pearl pore after plane machining completes.Lead the schematic diagram of pearl pipe as shown in Figure 9, Fig. 9 is the top view of Fig. 8.
For outer circulation nut, gauge head center is in the distance of nut axis direction to its right end face
lcan determine according to the following two kinds mode:
The first, lead the pearl pipe circulation number of turns be 1.5 circles or 3.5 circle time,
las shown in the formula:
The second, when to lead the pearl pipe circulation number of turns be 2.5 circle,
las shown in the formula:
In above formula,
a,
bnumerical value is shown in Fig. 9,
p h for the helical pitch of ball screw assembly, n be integer (n=0, ± 1, ± 2, ± 3 ...), the length that the value of n can put in nut by measuring staff is determined.
The invention will be further described below:
Ball nut phase measurement device provided by the invention as shown in Figure 1.In Fig. 1,1 is connecting axle, and the upper column part of connecting axle can be arranged on the main shaft in machining center or turnning and milling complex centre by handle of a knife.2 is line slideway, and guide rail is fixed by screws on 1 connecting axle.3 is slide block, can move up and down on guide rail 2 along guide rail direction.4 is connecting plate, and connecting plate is fixed on slide block.5 is pressing plates, is used for fixing measuring staff 6.7 is spheric probes, and gauge head size is consistent with the ball of lead screw pair.8 is back-up blocks, in idle state, is used for support slipper and whole moving part.9 is contiguous blocks, is used for installing back-up block 8, spring 10 and dial framework 11.12 is dial gauges, is used for detecting the change of spheric probe 7 at vertical direction.
The relative position of connecting axle 1, guide rail 2, back-up block 8, contiguous block 9 immobilizes.The relative position of slide block 3, connecting plate 4, pressing plate 5, measuring staff 6, gauge head 7 immobilizes, and this part forms the entirety can moved along guide rail direction simultaneously.
Spring 10 keeps pulling force downward for moving part.In measurement, under the effect of spring tension, spheric probe all the time with raceway EDGE CONTACT.When not measuring, under spring force, connecting plate 4 contacts with back-up block 8.The two ends of spring 10 are fixed with connecting plate 4 and contiguous block 9 respectively by screw.
Be connected by screw together between dial framework 11 and dial gauge 12, dial framework have long waist shaped groove, dial framework can be supplied along adjustment position, guide rail direction, as shown in Figure 2.In measurement, according to the depth of tested screw thread raceway, need to adjust dial framework, the requirement of adjustment makes dial gauge 12 in its range.
In ball nut processing, during application apparatus of the present invention, the first cutting thread raceway 13 of palpus, as shown in Figure 3, afterwards, needs the Working position finding reverser hole.As shown in Figure 4, in order to ensure the accurate location of reverser hole and screw thread raceway, must measure by the phase place of apparatus of the present invention double thread raceway.Before measurement, need apparatus of the present invention to be arranged on machining center main shaft by handle of a knife 14, this sentences four shaft vertical machining centers is that example is described.Need apparatus of the present invention measuring staff and nut axis keeping parallelism during installation.Nut 15 is arranged on the chuck 16 of lathe A axle.After apparatus of the present invention install, need the Y-axis coordinate adjusting lathe, make the centre of sphere of gauge head be in the XOZ plane of nut axis.Then carry out tool setting to the X-coordinate of gauge head, this should be consistent with the milling cutter in milling reverser hole to cutter position, can eliminate like this because benchmark is heavy and and the error brought.
During measurement, as shown in Figure 4, need the A position X-coordinate of spheric probe moved in Fig. 5, A size is the distance of reverser hole to nut end face.If A size end face needs follow-up fine finishining, during mobile gauge head, also upper surface allowance for finish must be added.
After Y-axis moves into place, need adjustment machining center Z axis.First need to estimate spheric probe to the distance of nut rolling way cunette, then moving processing center Z axis, before the absolute value of the distance increment of movement should be greater than, estimate the distance of gauge head to cunette.Gauge head can contact nut inner hole in the process, also may a certain position in raceway.
After above-mentioned steps completes, manually slowly adjust machining center A axle, i.e. nut central axis, makes nut slowly rotate.Meanwhile observe the change of dial gauge.Along with the rotation of nut, in XZ plane, the change of the position relationship of gauge head and raceway as shown in Figure 6.In the process that nut rotates a circle, gauge head moves up and down thereupon, and the movement of gauge head can bring the movement of measuring staff in apparatus of the present invention, because measuring staff is fixed on slide block by connecting plate, therefore moved up and down by driving slide block, the change of this amount of movement will show on dial gauge.When gauge head moves to Fig. 6 centre position, i.e., during the minimum point of Z-direction, the numerical value on dial gauge also will be changed to maximum, and now namely nut is the position at processing center, reverser hole in the position of circumferencial direction.
Claims (5)
1. a ball nut screw thread raceway phase measurement device, it is characterized in that, major mechanical structure comprises: connecting axle (1), line slideway (2), slide block (3), connecting plate (4), pressing plate (5), measuring staff (6), spheric probe (7), back-up block (8), contiguous block (9), spring (10), dial framework (11), dial gauge (12); The relative position of connecting axle (1), guide rail (2), back-up block (8), contiguous block (9) is fixed; The relative position of slide block (3), connecting plate (4), pressing plate (5), measuring staff (6), gauge head (7) is fixed, and this part constitutes the entirety can moved along guide rail direction simultaneously.
2. ball nut screw thread raceway phase measurement device according to claim 1, is characterized in that: described spring (10) keeps pulling force downward for moving part; In measurement, under the effect of spring tension, spheric probe all the time with screw thread raceway EDGE CONTACT; When not measuring, under spring force, connecting plate (4) contacts with back-up block (8).
3. ball nut screw thread raceway phase measurement device according to claim 2, it is characterized in that: be connected by screw together between described dial framework (11) and dial gauge (12), dial framework there is long waist shaped groove, can for dial framework along adjustment position, guide rail direction; In measurement, according to the depth of tested screw thread raceway, need to adjust dial framework, the requirement of adjustment makes dial gauge (12) in its range ability.
4. utilize the ball nut screw thread raceway phase measurement device as described in claim 1 or 2 or 3 to detect a method for the phase place of reverser hole in screw thread raceway of Inner eycle nut, it is characterized in that: step is as follows:
Phase measurement device is arranged on vertical machining centre main shaft;
Nut is arranged on vertical machining centre A axle chuck;
Adjustment probe location, make gauge head at lathe Y-axis and nut center superposition, gauge head is positioned at center, reverser hole in X-axis, and gauge head moves one end distance in Z axis negative direction, still has the trend of moving down when making gauge head be positioned at cunette;
Rotate lathe A axle, observe dial gauge numerical value, when dial gauge numerical value is maximum, the nut cylindrical position on gauge head opposite is center, reverser hole.
5. utilize the ball nut screw thread raceway phase measurement device as described in claim 1 or 2 or 3 to detect the method leading the phase place of pearl pore in screw thread raceway of outer circulation nut, it is characterized in that: step is as follows:
A) phase measurement device is arranged on vertical machining centre main shaft;
B) nut is arranged on vertical machining centre A axle chuck;
C) adjust probe location, make gauge head at lathe Y-axis and nut center superposition;
D) gauge head is in the position of X-axis, and namely gauge head center calculates in two kinds of situation at the distance L of nut axis direction to its right end face, the first, lead the pearl pipe circulation number of turns be 1.5 circles or 3.5 circle time, L as shown in the formula:
The second, when to lead the pearl pipe circulation number of turns be 2.5 circle, L as shown in the formula:
In above formula, A, B numerical value is shown in Fig. 9, and Ph is the helical pitch of ball screw assembly, n be integer (n=0, ± 1, ± 2, ± 3 ...), the length that the value of n can put in nut by measuring staff is determined;
E) gauge head moves one end distance in Z-direction, still has the trend of moving down when making gauge head be positioned at cunette;
F) rotate lathe A axle, observe dial gauge numerical value, when dial gauge numerical value is maximum, the position on gauge head opposite is the outer round flat Working position of nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410449293.1A CN104259933A (en) | 2014-09-05 | 2014-09-05 | Ball nut phase measuring device and corresponding nut return device hole machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410449293.1A CN104259933A (en) | 2014-09-05 | 2014-09-05 | Ball nut phase measuring device and corresponding nut return device hole machining method |
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| Publication Number | Publication Date |
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| CN104259933A true CN104259933A (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410449293.1A Pending CN104259933A (en) | 2014-09-05 | 2014-09-05 | Ball nut phase measuring device and corresponding nut return device hole machining method |
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| CN (1) | CN104259933A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969712A (en) * | 2017-02-14 | 2017-07-21 | 丽水市杰祥科技有限公司 | Screw thread drift meter |
| CN108458650A (en) * | 2018-05-31 | 2018-08-28 | 广濑精密机械（太仓）有限公司 | A kind of bearing inner race track groove measurement device |
| CN108705381A (en) * | 2018-04-16 | 2018-10-26 | 西安飞机工业（集团）有限责任公司 | The aligning method and alignment device of a kind of deep groove side hole digital control processing |
| CN111947923A (en) * | 2020-08-19 | 2020-11-17 | 南京理工大学 | Device and method for measuring phase error of ball nut |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969712A (en) * | 2017-02-14 | 2017-07-21 | 丽水市杰祥科技有限公司 | Screw thread drift meter |
| CN108705381A (en) * | 2018-04-16 | 2018-10-26 | 西安飞机工业（集团）有限责任公司 | The aligning method and alignment device of a kind of deep groove side hole digital control processing |
| CN108458650A (en) * | 2018-05-31 | 2018-08-28 | 广濑精密机械（太仓）有限公司 | A kind of bearing inner race track groove measurement device |
| CN108458650B (en) * | 2018-05-31 | 2023-10-17 | 广濑精密机械（太仓）有限公司 | Bearing inner race raceway groove measuring device |
| CN111947923A (en) * | 2020-08-19 | 2020-11-17 | 南京理工大学 | Device and method for measuring phase error of ball nut |
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Application publication date: 20150107 |