Summary of the invention
The technical issues of the utility model is solved is to provide a kind of ball screw assembly, stroke mistake with compensation device
Difference measuring device brings measurement error with the bending deformation for solving the problems, such as that lead screw pair self weight generates.
Realize the technical solution of the utility model aim are as follows:
A kind of ball screw assembly, journey error measuring device with compensation device, including head frame, lathe bed, pass through guide rail connect
It connects in the measurement bay on lathe bed, tailstock, the Circular gratings being arranged in head frame, the long grating being arranged between lathe bed and measurement bay;
The lathe bed is equipped with guide rail, and the measurement bay can be slided along guide rail with respect to lathe bed, and glide direction is parallel to the axial direction of lead screw;It surveys
It measures frame and is equipped with measuring head, measuring head is bonded with lead screw helicla flute central diameter, what the Circular gratings were turned over to measure tested lead screw
Angle can from which further follow that the theoretical stroke of tested lead screw, and the long grating is to measure measuring head along lead screw axis direction
Traveled distance;It is additionally provided with compensation device on the lathe bed, to support lead screw bottom;
The compensation device includes fixed frame, mounting base, rotating seat, rotation seat, supporting block;The mounting base and fixed frame
It is connected;The mounting base is equipped with the first circular hole, and circular hole is axially vertical direction, and the rotating seat lower end is equipped with first rotating shaft,
First rotating shaft is located in the first circular hole, can rotate in the first circular hole;The rotating seat center is equipped with eccentric orfice;The rotation seat
Lower end is equipped with the second shaft, and the second shaft is located in eccentric orfice, and the supporting block and rotation seat upper end are connected;The rotating seat and
It is additionally provided between mounting base and the two is carried out to locked locking mechanism.
The utility model compared with prior art, remarkable advantage:
(1) the ball screw assembly, journey error measuring device with compensation device of the utility model is compensated by setting
Device can be avoided lead screw since the bending deformation that self gravity generates brings measurement error, and lead screw pair self weight is avoided to generate
Bending deformation bring measurement error, improves measuring accuracy.
(2) the ball screw assembly, journey error measuring device with compensation device of the utility model, compensation device use
Suspension type, the part that can avoid on compensation device and lathe bed generate interference.
(3) the ball screw assembly, journey error measuring device with compensation device of the utility model, the rotation of compensation device
Swivel base is equipped with eccentric orfice, and rotation seat is arranged in eccentric orfice, can adjust the axis of rotation seat and the axis of lead screw by eccentric orfice
Line is in same vertical plane.
(4) the ball screw assembly, journey error measuring device with compensation device of the utility model, the rotation of compensation device
Swivel base is equipped with eccentric orfice, and rotation seat is arranged in eccentric orfice, can adjust the axis of rotation seat and the axis of lead screw by eccentric orfice
Line is in same vertical plane.
(5) the ball screw assembly, journey error measuring device with compensation device of the utility model, compensation device are equipped with
Height adjustment mechanism is adjusted the height of rotation seat, is come into full contact with adjusting supporting block upper end with lead screw, and guarantee lead screw axis
It is parallel with supporting plate.
(6) the ball screw assembly, journey error measuring device with compensation device of the utility model, the peace of compensation device
Filling seat includes fixed block and swinging block, and swinging block can fix block relatively and swing certain angle, to realize adaptive adjustment, avoids adding
Work, installation error cause rigid support, cause stuck.
The utility model is described in further detail with reference to the accompanying drawing.
Specific embodiment
In order to illustrate the technical solution of the utility model and technical purpose, with reference to the accompanying drawing and specific embodiment is to this reality
It is described further with novel.
In conjunction with Fig. 1-Fig. 5, a kind of ball screw assembly, journey error measuring device with compensation device of the utility model,
Including head frame 21, lathe bed 22, the measurement bay 23 being connected on lathe bed 22 by guide rail, tailstock 24, the circle being arranged in head frame 21
Grating, the long grating being arranged between lathe bed 22 and measurement bay 23;The lathe bed 22 is equipped with guide rail, and the measurement bay 23 can edge
Guide rail is slided with respect to lathe bed 22, and glide direction is parallel to the axial direction of lead screw;Measurement bay is equipped with measuring head, measuring head and lead screw spiral shell
The fitting of spin slot central diameter, the angle that the Circular gratings are turned over to measure tested lead screw, to from which further follow that the theory of tested lead screw
Stroke, the long grating is to measure measuring head along the traveled distance of lead screw axis direction;Compensation is additionally provided on the lathe bed 22
Device 100;Compensation device 100 is to support lead screw bottom.
The compensation device 100 includes fixed frame IV, mounting base I, rotating seat 9, rotation seat 14, the branch for supporting lead screw bottom
Bracer 15;The mounting base I and fixed frame IV is connected;The mounting base I is equipped with the first circular hole 2-1, and circular hole 2-1 is axially perpendicular
Histogram is to 9 lower end of rotating seat is equipped with first rotating shaft 9-1, and first rotating shaft 9-1 is located in the first circular hole 2-1, can be in the first circle
Rotation in the 2-1 of hole;9 center of rotating seat is equipped with eccentric orfice 9-2;14 lower end of rotation seat is equipped with the second shaft 14-1, the
Two shaft 14-1 are located in eccentric orfice 9-2, and the supporting block 15 is connected with 14 upper end of rotation seat;The rotating seat 9 and mounting base I
Between be additionally provided with locking mechanism, rotating seat 9 and mounting base I are locked;By the way that eccentric orfice 9-2 is arranged, rotating seat 9 is rotated
When, rotation seat 14 can be driven to rotate, rotation seat 14 rotates, so that the axial direction of rotation seat 14 turns with the axial direction of eccentric orfice 9-2
It is dynamic, so that the axis of rotation seat 14, the axis of first rotating shaft 9-1 and lead screw is in same vertical plane, to guarantee rotation seat
14 from the center of radial support lead screw, eccentric to prevent from supporting caused by the processing of entire compensation device, installation error;Eccentric orfice
After 9-2 is adjusted in place, rotating seat 9 and mounting base I are locked by locking mechanism, rotating seat 9 is avoided to continue to rotate.
In some embodiments, the mounting base I is equipped with the first threaded hole 2-3, and the first threaded hole 2-3 is axial with the
One circular hole 2-1 is axially vertical, screw 10 is equipped in the threaded hole 2-1, by being screwed into screw 10, by rotating seat 9 and mounting base I
It is locked, the first threaded hole 2-3 and screw on mounting base I constitute locking mechanism together.
In other embodiment, the end the mounting base I is equipped with threaded hole;Threaded hole axial direction and the first circular hole 2-1
It is axial parallel;9 upper end of rotating seat is disc structure, and disk is equipped with arc groove, is equipped with screw in arc groove, arc groove with
Rotating seat 9 can rotate when rotating relative to screw;The nut of screw is located at arc groove upper end, and the stud of screw is screwed into spiral shell from arc groove
Pit, screw are threaded into hole to lock rotating seat 9 and mounting base I, on the threaded hole, rotating seat 9 on mounting base I
Arc groove and screw constitute locking mechanism together.
Further, entire compensation device is additionally provided with height adjustment mechanism, and the height adjustment mechanism includes end cap 11, adjusts
Save screw 13;The end cap 11 is fixed on the lower end mounting base I, and 11 center of end cap is equipped with the second threaded hole 11-1, and described the
It is equipped in two threaded hole 11-1 and adjusts screw 13;The adjusting screw 13 is located at 14 lower end of rotation seat, can by adjusting screw 13
The height for adjusting rotation seat 14, is come into full contact with, and guarantee lead screw axis and mobile platform with adjusting 15 upper end of supporting block with lead screw
In parallel.
Further, it is additionally provided with fastening nut 12 on the adjusting screw 13, screw 13 will be adjusted and locked with end cap 11,
The vibration generated during guide screw movement is avoided, causes to adjust the loosening of screw 13.
Further, the mounting base I includes fixed block 1, swinging block 2;1 rear end of fixed block and fixed frame IV are solid
Even;The fixed block 1 is equipped with the second circular hole 1-1;The axial direction for being axially perpendicular to the first circular hole 2-1 of second circular hole 1-1;It is described
First circular hole 2-1 is arranged on swinging block 2;2 rear end of swinging block is equipped with third shaft 3, and the setting of third shaft 3 is in the second circle
In the 1-1 of hole, 3 rear end of third shaft is equipped with nut 6, to carry out axial restraint to third shaft 3;The swinging block 2 passes through
Third shaft 3 can fix the relative rotation of block 1 relatively, and position-limit mechanism is equipped between the fixed block 1 and swinging block 2, to limit pendulum
Motion block 2 and fixed block 1 relatively rotate angle.When compensation device is supported on lead screw lower end, swinging block 2 can fix the pendulum of block 1 relatively
Dynamic certain angle supports adaptive adjustment to realize, avoids processing, installation error from causing rigid support, cause stuck.
As an implementation, in conjunction with Fig. 4 and Fig. 6,1 front end of fixed block is equipped with arc groove 8,8 center of circle of arc groove
It is concentric with the second circular hole 1-1;2 rear end of swinging block is fixed with straight pin 7, and 7 rear end of straight pin is located in arc groove 8;
When swinging block 2 rotates, it can drive straight pin 7 that can slide in arc groove 8;The angle of oscillation of swinging block 2 can be limited by arc groove 8
Degree is hung upside down after preventing swinging block 2 from rotating, at the same supporting block 15 contact with lead screw after can guarantee the adaptively level of swinging block 2.
Further, the central angle of arc groove 8 is 30 °, to limit the rotational angle of swinging block 2 within the scope of 30 °.
Further, it is also cased with ball circle 4 in the third shaft 3, gasket is equipped between the ball circle 4 and nut 6
5, it is convenient for the rotation of swinging block 2 by ball circle 4, avoids nut 6 to the locked of swinging block 2.
Further, 15 upper end of supporting block is equipped with V-shaped groove, lead screw is supported by V-shaped groove, so that 15 upper end of supporting block
There is better supporting role with lead screw.The supporting block 15 is connected by positioning pin with rotation seat 14, so that V-shaped groove center phase
It is symmetrical between two parties to 14 axis of rotation seat.
In as an implementation, in conjunction with Fig. 1, the fixed frame IV includes hanging seat 18, rotation bolt 17, fixture block 16;
18 lower end of hanging seat is equipped with card slot, and the fixture block 16 is located in card slot, and the setting of fixture block 16 makes in rotation 17 lower end of bolt
Card slot is stuck in 22 upper end of lathe bed, fixture block 16 is arranged in the mounting groove on lathe bed 22 by the used time, and rotation rotation bolt 17 will block
Block 16 and lathe bed 22 are fixed.
In other embodiment, the fixed frame IV can also be used other some clamp systems and will entirely compensate
Device and lathe bed 22 are fixed.
Further, the Circular gratings include the scale grating being fixed on a frame 21, cover in head frame indication grating;It is described
Long grating includes the scale grating being connected with lathe bed 22, the indication grating connected with measurement bay 23;The head frame 21 of the utility model,
Lathe bed 22, measurement bay 23, the structure of tailstock 24 and position connection relationship use patent CN201720699803X.
Further, the lathe bed 22 is equipped with sliding slot, and the tailstock 24 can slidably reciprocate on 22 sliding slot of lathe bed, to adjust
The fixed range of the opposite frame 21 of whole tailstock 24, to meet the clamping test of the lead screw of different length;The compensation device can
It slidably reciprocates on the chute, to meet the support compensation of different length lead screw.
Before the ball screw assembly, journey error measuring device test with compensation device of the utility model, first compensation is filled
It sets and first compensation device 100 is fixed on lathe bed 22 and is debugged: lead screw is fixed between a frame 21 and tailstock 24,
Rotation adjusts screw 13, contacts supporting block 15 with lead screw, and at this moment swinging block 18 is automatically positioned and locks with supporting block 15.Adjustment
When compensation device 100, using dial test indicator and Magnetic gauge stand, Magnetic gauge stand is adsorbed on supporting plate 101, and lever thousand is divided
Table is fixed on Magnetic gauge stand.As shown in Figure 8.
Set-up procedure one:, will be on amesdial when the axis and lead screw axis of adjustment eccentric orfice 9-2 are in same perpendicular
Rounded contact be arranged on the direction y of lead screw and contacted with lead screw, to guarantee to show reading on table, slip blade from left to right
101, the reading on amesdial is observed, when rounded contact is close to compensation device 100, rotating seat 9 is rotated, makes the numerical value of amesdial
Stablize within the scope of required installation accuracy.
Set-up procedure two: when adjusting screw axis is parallel with supporting plate 101, the rounded contact on amesdial is arranged in lead screw
The direction z on and contact with lead screw, to guarantee to show reading on table, slip blade 101, observe the reading on amesdial from left to right
Number, when rounded contact is close to compensation device 100, rotation adjusts screw 13, makes the numerical stability of amesdial in required peace
It fills in accuracy rating.
Repetitive operation step 1 and step 2 consolidate screw 10 when the overall precision of compensation device reaches installation requirement
It is scheduled in the first threaded hole 18-2, rotating seat 9 is locked into anti-rotation, while being locked with fastening nut 12 and adjusting screw 13.
Complete compensation device 100 fixation and debugging after, measuring device can be started, to ball screw assembly, journey error into
Row measurement.
It is provided according to national standard GB/T 17587.3-1998, the stroke variation Vup and 2 π in ball screw assembly, effective travel
The stroke variation V allowed in radian2ΠPIt is the inspection project of deviation of stroke.In the measuring device of the utility model, measurement is former
Manage as follows: the theoretical stroke in lead screw pair effective travel is L1, L1=N × P, and wherein P is the lead of tested lead screw, and N is tested
The number of total coils that lead screw turns over, N=θ/(2 π), θ are the angle that the lead screw that Circular gratings are surveyed turns over;Reality in lead screw pair effective travel
Stroke is L2, and traveled distance L2 is measured by long grating, so Vup=can be obtained | L1-L2 |.The reason that lead screw pair allows in 2 π radians
It is L3, L3=P by stroke;The traveled distance that lead screw pair allows in 2 π radians is L4, and L4 is that Circular gratings and long grating measure, institute
V can be obtained2ΠP=| L3-L4 |.