CN107063102B - Micro ball screw pair stroke error measuring device - Google Patents

Micro ball screw pair stroke error measuring device Download PDF

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Publication number
CN107063102B
CN107063102B CN201710454840.9A CN201710454840A CN107063102B CN 107063102 B CN107063102 B CN 107063102B CN 201710454840 A CN201710454840 A CN 201710454840A CN 107063102 B CN107063102 B CN 107063102B
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measuring
grating
headstock
supporting plate
tailstock
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CN107063102A (en
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欧屹
怀乾宏
周小丹
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/02Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness

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  • General Physics & Mathematics (AREA)
  • Machine Tool Sensing Apparatuses (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The invention discloses a micro ball screw pair stroke error measuring device, which comprises a marble lathe bed, a headstock, a tailstock and a measuring frame, wherein the headstock, the tailstock and the measuring frame are arranged on the marble lathe bed; the headstock and the tailstock clamp the piece to be tested, and the headstock is provided with a driving plate and a shifting fork, and the driving plate drives the shifting fork to move so as to drive the screw rod to rotate. The scale grating of the circular grating is fixed on the head frame, and the indicating grating rotates along with the drive plate and is used for measuring the rotating angle of the screw rod. The measuring head on the measuring frame moves along the spiral groove of the lead screw, and the measuring frame moves linearly along the guide rail of the lathe bed when the lead screw rotates. The scale grating of the long grating is fixed on the bed body, and the indicating grating and the measuring frame move together for measuring the actual stroke of the screw rod. The measuring instrument of the measuring device has the advantages of small volume, high precision, high efficiency and high automation degree, and is suitable for detecting the stroke error of the micro ball screw pair.

Description

Micro ball screw pair stroke error measuring device
Technical Field
The invention belongs to the technical field of measurement, and particularly relates to a micro ball screw pair stroke error measuring device.
Background
The measuring principle of the screw stroke error is mature, the theoretical stroke of the screw is obtained through calculation by measuring the rotation angle of the screw, and the theoretical stroke of the screw is compared with the actual stroke obtained through measurement to obtain the stroke error of the screw. At present, stroke error detection systems of medium and large ball screw pairs are complete, and although the measurement range of a stroke error measuring instrument is adjustable, the measurement of a micro ball screw is still limited. In structural layout, the existing detection device and the miniature ball screw are not suitable; in software processing, the micro ball screw does not have special detection software and needs debugging. The existing detection device is used for measuring the microminiature ball screw, so that the efficiency is low, the precision is low, and the limitation is more.
In summary, no special equipment is provided to detect the micro ball screw pair in the current stage, and the current detection device cannot accurately measure the stroke error.
Disclosure of Invention
The invention aims to provide a micro ball screw pair stroke error measuring device.
The technical solution for realizing the purpose of the invention is as follows: a micro ball screw pair stroke error measuring device comprises a marble lathe bed, a headstock, a tailstock and a measuring frame, wherein the headstock, the tailstock and the measuring frame are arranged on the lathe bed;
the headstock is provided with a main shaft, a circular grating and a headstock tip drive plate, wherein the circular grating comprises a scale grating and an indication grating; a headstock centre is arranged on a main shaft of the headstock [1], and the headstock centre is coaxial with the main shaft;
the tailstock is provided with a tailstock center, a center sleeve, a steel sleeve with a mosaic, a gear shaft and a handle; a middle sleeve is fixedly connected on the tailstock seat, a middle sleeve is arranged in the middle of the middle sleeve, a gear shaft is arranged between the middle sleeve and is used for matching with a rack on the middle sleeve, a handle is fixedly connected with the gear shaft, a middle is arranged in the middle sleeve, and the middle sleeve is axially telescopic together with the middle;
the measuring frame is provided with an indicating grating, a supporting plate, a cam, a bracket, a guide sleeve and a measuring head, and the supporting plate is arranged on an air floatation guide rail of the lathe bed and can move axially along the air floatation guide rail; the supporting plate is provided with a guide rail, the guide rail is provided with a supporting plate, the supporting plate is connected with a screw rod, the screw rod is matched with a cam on the supporting plate, a spring is arranged between the supporting plate and the supporting plate, when the cam rotates, the screw rod loses support, the supporting plate is pulled out under the tension of the spring, a measuring frame on the supporting plate is pulled out simultaneously, and the measuring head can be rapidly withdrawn from a screw rod spiral groove; set up the forked tail guide rail in the backup pad, be equipped with the support on the forked tail guide rail, the support can be followed the forked tail guide rail and removed in the backup pad, sets up uide bushing and the measuring head that links firmly each other on the support, is equipped with little lead screw in the uide bushing, rotates the radial displacement that little lead screw is used for adjusting the measuring head.
When the device works, the head and tail frame top clamping device clamps a tested lead screw, the lead screw is firstly matched with the head frame top, the tail frame moves in a T-shaped groove of a machine body through a T-shaped bolt, and the tail frame is fixed when the position is adjusted until the lead screw is stably clamped; the bracket on the measuring frame is connected with the supporting plate through a dovetail guide rail, the radial position of the bracket on the supporting plate is adjusted through the dovetail guide rail, and the bracket is fixed after reaching a proper place; adjusting a knob of a measuring head part on a measuring frame, and enabling a guide sleeve to perform corresponding radial movement by the rotation of a small screw rod so as to adjust the radial position of the measuring head and ensure that the measuring head is attached to the middle diameter of a screw rod spiral groove, and a spring between the small screw rod and the guide sleeve generates spring pre-tightening force due to compression, so that the position of the measuring head is kept unchanged after being stressed; the switch is turned on, the motor works, the motor spindle transmits power to the gear speed reducer in the headstock through the belt pulley to drive the drive plate to rotate, the shifting fork on the drive plate shifts the lead screw to synchronously rotate, and the indicating grating of the circular grating moves along with the drive plate to measure the rotation angle of the lead screw; the measuring head is positioned at the middle diameter of the spiral groove of the screw rod, the rotation of the screw rod drives the measuring head to do linear motion, the indicating grating of the long grating is fixedly connected with the measuring frame, the scale grating is fixedly connected with the lathe bed, and the linear distance of the motion of the measuring frame, namely the actual stroke of the screw rod, can be measured; acquiring grating signals through a counting card, inputting the grating signals into a computer for data processing, and obtaining a stroke error of the lead screw to be measured; the supporting plate and the supporting plate on the measuring frame are connected through a guide rail, the supporting plate is fixedly connected with a screw rod, the supporting plate is fixedly connected with a cam, the screw rod is contacted with the cam, the supporting plate is supported by the cam, a spring is arranged between the supporting plate and the supporting plate, the supporting plate is balanced under the action of spring tension and cam supporting force, after the measurement is finished, the cam on the measuring frame is rotated, the supporting plate loses the supporting force, the supporting plate is quickly pulled out under the action of the spring tension, and the measuring head leaves the screw rod spiral groove; the tailstock handle is fixedly connected with the gear shaft, the center sleeve is provided with a rack structure, the handle is rotated, the center sleeve is rapidly withdrawn under the matching of the gear shaft and the rack, and the tailstock center is rapidly withdrawn; the lead screw loses the tip support of the tailstock and can be easily dismounted.
Compared with the prior art, the invention has the following remarkable advantages: 1) The measuring instrument of the measuring device has small volume, high precision, high efficiency and high automation degree, and is suitable for detecting the stroke error of the micro ball screw pair; 2) The device of the invention improves the measurement precision and the measurement efficiency of the microminiature ball screw and solves the limitation problem of the existing measurement device.
The present invention is described in further detail below with reference to the attached drawings.
Drawings
Fig. 1 is a schematic view of the overall structure of a micro ball screw pair stroke error measuring device.
Fig. 2 is a schematic view of a measuring device headstock.
Fig. 3 is a schematic view of a measuring frame of the detection device.
Fig. 4 is a schematic view of a tailstock of the detection device.
Detailed Description
With the attached drawing, the stroke error measuring device of the microminiature ball screw pair comprises a marble lathe bed 2, a headstock 1, a tailstock 4 and a measuring frame 3, wherein the headstock 1, the tailstock 4 and the measuring frame 3 are arranged on the lathe bed, the headstock 1 is arranged on one side of the marble lathe bed 2, the tailstock 4 is arranged on the other side of the marble lathe bed 2, the measuring frame 3 is positioned in the middle of the marble lathe bed 2 and used for measuring a measured screw, and a scale grating 5-1 is fixedly connected to the marble lathe bed 2;
the headstock 1 is provided with a main shaft 1-5, a circular grating, a headstock tip 1-1 and a drive plate 1-2, wherein the circular grating comprises a scale grating 1-3 and an indication grating 1-4, the main shaft 1-5 of the headstock 1 is sleeved with the drive plate 1-2 and the indication grating 1-4, and the scale grating 1-3 of the circular grating is fixed on the headstock; a headstock centre 1-1 is arranged on a main shaft 1-5 of the headstock 1, and the headstock centre 1-1 is coaxial with the main shaft;
the tailstock 4 is provided with a tailstock centre 4-1, a centre sleeve 4-2, a built-in steel sleeve 4-3, a gear shaft 4-5 and a handle 4-4; a steel sleeve 4-3 with a mosaic is fixedly connected on the tailstock seat, a center sleeve 4-2 is arranged inside the steel sleeve 4-3 with a mosaic, a gear shaft 4-5 is arranged between the steel sleeve 4-3 with a mosaic and the center sleeve 4-2 and is used for matching with a rack on the center sleeve 4-2, a handle 4-4 is fixedly connected with the gear shaft 4-5, a center 4-1 is arranged in the center sleeve 4-2, and the center sleeve 4-2 extends and retracts together with the center 4-1 in the axial direction;
the measuring frame 3 is provided with an indicating grating 5-2, a supporting plate 3-4, a supporting plate 3-5, a cam 3-7, a bracket 3-9, a guide sleeve 3-2 and a measuring head 3-3, wherein the supporting plate 3-4 is arranged on an air floatation guide rail of the lathe bed 2 and can move along the axial direction of the air floatation guide rail; a guide rail is arranged on the supporting plate 3-4, a supporting plate 3-5 is arranged on the guide rail, a screw 3-6 is connected to the supporting plate 3-5, the screw 3-6 is matched with a cam 3-7 on the supporting plate 3-4, a spring is arranged between the supporting plate 3-4 and the supporting plate 3-5, when the cam 3-7 rotates, the screw 3-6 loses support, the supporting plate 3-5 is pulled out under the tension of the spring, a measuring frame 3 on the supporting plate is pulled out simultaneously, and the measuring head 3-3 is rapidly withdrawn from a screw rod spiral groove; dovetail guide rails 3-8 are arranged on the supporting plates 3-5, brackets 3-9 are arranged on the dovetail guide rails 3-8, the brackets 3-9 can move on the supporting plates 3-5 along the dovetail guide rails 3-8, guide sleeves 3-2 and measuring heads 3-3 which are fixedly connected with each other are arranged on the brackets 3-9, small screw rods 3-1 are arranged in the guide sleeves 3-2, and the small screw rods 3-1 are rotated to adjust the radial displacement of the measuring heads 3-3.
The contact parts of the headstock 1 and the tailstock 4 and the bed 2 are fully jointed, and the axes of the headstock finial 1-1 and the tailstock finial 4-1 are positioned on the same horizontal line.
The movement direction of the measuring frame 3 is parallel to the connecting line of the top points of the head and tail frames, and the measuring center of the measuring head 3-3 is on the connecting line of the top points of the head and tail frames.
The installation center of the indication raster 1-4 of the circular raster coincides with the rotation center of the drive plate 1-2.
The long grating is parallel to a connecting line of the top points of the head and tail frames, and a gap exists between the indication grating 5-2 and the scale grating 5-1 and the gap is parallel.
A spring is also arranged in the guide sleeve 3-2 and sleeved on the small screw rod 3-1.
A measuring method based on the micro ball screw pair stroke error measuring device comprises the following steps:
step 1, abutting one end of a tested lead screw against the tip of a headstock, adjusting the position of a tailstock on a lathe bed to fix the other end of the tested lead screw, and clamping the tested lead screw;
step 2, placing the measuring frame at the starting end of the screw rod spiral groove, and adjusting the radial movement of the frame and the measuring head to place the measuring head in the middle diameter of the screw rod spiral groove;
step 3, opening a switch of the measuring device, sending an instruction by an industrial personal computer to control the motor to work, enabling a drive plate to rotate by a motor shaft of the motor through belt transmission and gear transmission, fixedly connecting the drive plate with the indicating grating, and when the drive plate rotates, a lead screw is driven by a shifting fork to rotate at a constant speed, and the indicating grating rotates by the same angle;
step 4, rotating the screw rod, and performing corresponding axial movement on a measuring head positioned in the middle diameter of a spiral groove of the screw rod, wherein the indicating grating is fixedly connected to a supporting plate of the measuring frame and moves synchronously;
step 5, collecting the circular grating signal and the long grating signal by a counting card to obtain the rotation angle and the actual stroke of the screw rod;
and 6, determining the stroke error of the tested lead screw by the computer according to the collected lead screw rotating angle and the collected actual stroke.
The measuring instrument of the measuring device has the advantages of small volume, high precision, high efficiency and high automation degree, and is suitable for detecting the stroke error of the micro ball screw pair.
The present invention will be described in further detail with reference to examples.
Examples
A micro ball screw pair stroke error measuring device comprises a headstock, a tailstock, a measuring frame and a lathe bed; the head frame tip and the tail frame tip clamp a tested lead screw; the headstock is provided with a circular grating for measuring the rotation angle of the lead screw; the lathe body is fixedly connected with a scale grating, and the measuring frame is fixedly connected with a corresponding indicating grating and used for measuring the axial movement distance of the measuring frame; the stroke error of the micro ball screw pair can be obtained by processing the parameters through a computer.
Referring to fig. 1, the stroke error measuring device of the micro ball screw pair is characterized by comprising a marble lathe bed, a headstock, a tailstock and a measuring frame, wherein the headstock, the tailstock and the measuring frame are arranged on the lathe bed; the inclined plane A, the upper plane B and the back surface C of the lathe body are matching surfaces of the support head and the tail frame, the back surface C is a vertical plane perpendicular to the ground, the upper plane B and the vertical plane form an angle of 102.5 degrees, and the inclined plane A and the upper plane form an angle of 102.5 degrees; the measuring centers of the headstock center, the tailstock center and the measuring head are positioned on the same straight line;
referring to fig. 2, the headstock is provided with a main shaft, a circular grating, a headstock tip and a drive plate, wherein the circular grating comprises a scale grating and an indication grating; a headstock centre is arranged on a main shaft of the headstock and is coaxial with the main shaft;
referring to fig. 3, a tailstock center, a center sleeve, a bullsy sleeve, a gear shaft and a handle are arranged on the tailstock; a middle sleeve is fixedly connected on the tailstock seat, a middle sleeve is arranged in the middle of the middle sleeve, a gear shaft is arranged between the middle sleeve and is used for matching with a rack on the middle sleeve, a handle is fixedly connected with the gear shaft, a middle is arranged in the middle sleeve, and the middle sleeve is axially telescopic together with the middle;
referring to fig. 4, the measuring frame is provided with an indicating grating, a supporting plate, a cam, a bracket, a guide sleeve and a measuring head, wherein the supporting plate is arranged on an air-floating guide rail of the lathe bed and can move axially along the air-floating guide rail; the supporting plate is provided with a guide rail, the guide rail is provided with a supporting plate, the supporting plate is connected with a screw rod, the screw rod is matched with a cam on the supporting plate, a spring is arranged between the supporting plate and the supporting plate, when the cam rotates, the screw rod loses support, under the tension of the spring, the supporting plate and a measuring frame on the supporting plate are simultaneously pulled out, and the measuring head can be rapidly withdrawn from a screw rod spiral groove; set up the forked tail guide rail in the backup pad, be equipped with the support on the forked tail guide rail, the support can be followed the forked tail guide rail and removed in the backup pad, sets up uide bushing and the measuring head that links firmly each other on the support, is equipped with little lead screw in the uide bushing, rotates the radial displacement of the adjustable measuring head of little lead screw.
The contact parts of the headstock and the tailstock and the bed body are fully attached, and the axes of the headstock centre and the tailstock centre are positioned on the same horizontal line. The motion direction of the measuring frame is parallel to the connecting line of the top points of the head and the tail frames, and the measuring center of the measuring head is on the connecting line of the top points of the head and the tail frames. The installation center of the indicating grating of the circular grating is coincided with the rotation center of the drive plate. The long grating is parallel to the top connecting line of the head and tail frames, and a gap exists between the indication grating and the scale grating and the indication grating is parallel to the scale grating. The spring is arranged in the guide sleeve and sleeved on the small screw rod, and the pretightening force of the spring ensures that the position of the measuring head is unchanged during working.
Referring to fig. 2 and 3, the lead screw clamping device comprises a headstock center and a tailstock center, the headstock center is fixed on the headstock main shaft and is coaxial with the main shaft, and the headstock is fixedly connected with the machine body; a centre is arranged in a centre sleeve in the tailstock, a T-shaped bolt is arranged on the tailstock, the T-shaped bolt can move in a T-shaped groove in the lathe bed, and the tailstock is fixed by a locking knob after the position of the tailstock is determined according to the specific length of a piece to be measured.
When the device works, the head and tail frame top clamping device clamps a tested lead screw, the lead screw is firstly matched with the head frame top, the tail frame moves in a T-shaped groove of a lathe bed through a T-shaped bolt, and the tail frame is fixed when the position is adjusted until the lead screw is stably clamped; the bracket on the measuring frame is connected with the supporting plate through the dovetail guide rail, the radial position of the bracket on the supporting plate is adjusted through the dovetail guide rail, and the bracket is fixed after reaching a proper place; adjusting a knob of a measuring head part on a measuring frame, and enabling a guide sleeve to perform corresponding radial movement by the rotation of a small screw rod so as to adjust the radial position of the measuring head and ensure that the measuring head is attached to the middle diameter of a screw rod spiral groove, and a spring between the small screw rod and the guide sleeve generates spring pre-tightening force due to compression, so that the position of the measuring head is kept unchanged after being stressed; the switch is turned on, the motor works, the motor spindle transmits power to the gear speed reducer in the headstock through the belt pulley to drive the drive plate to rotate, the shifting fork on the drive plate shifts the lead screw to synchronously rotate, and the indicating grating of the circular grating moves along with the drive plate to measure the rotation angle of the lead screw; the measuring head is positioned at the middle diameter of the spiral groove of the screw rod, the rotation of the screw rod drives the measuring head to do linear motion, the indicating grating of the long grating is fixedly connected with the measuring frame, the scale grating is fixedly connected with the lathe bed, and the linear distance of the motion of the measuring frame, namely the actual stroke of the screw rod, can be measured; acquiring grating signals through a counting card, inputting the grating signals into a computer for data processing, and obtaining a stroke error of the lead screw to be measured; the supporting plate and the supporting plate on the measuring frame are connected through a guide rail, the supporting plate is fixedly connected with a screw rod, the supporting plate is fixedly connected with a cam, the screw rod is contacted with the cam, the supporting plate is supported by the cam, a spring is arranged between the supporting plate and the supporting plate, the supporting plate is balanced under the action of spring tension and cam supporting force, after the measurement is finished, the cam on the measuring frame is rotated, the supporting plate loses the supporting force, the supporting plate is quickly pulled out under the action of the spring tension, and the measuring head leaves the screw rod spiral groove; the tailstock handle is fixedly connected with the gear shaft, the center sleeve is provided with a rack structure, the handle is rotated, the center sleeve is rapidly withdrawn under the matching of the gear shaft and the rack, and the tailstock center is rapidly withdrawn; the lead screw loses the tip support of the tailstock and can be easily dismounted.
The device of the invention improves the measurement precision and the measurement efficiency of the microminiature ball screw and solves the limitation problem of the existing measurement device.

Claims (7)

1. A microminiature ball screw pair stroke error measuring device is characterized by comprising a marble lathe bed [2], a headstock [1], a tailstock [4] and a measuring frame [3] which are arranged on the lathe bed, wherein the headstock [1] is arranged on one side of the marble lathe bed [2], the tailstock [4] is arranged on the other side of the marble lathe bed [2], the measuring frame [3] is positioned in the middle of the marble lathe bed [2] and is used for measuring a lead screw to be measured, and a scale grating [5-1] is fixedly connected to the marble lathe bed [2 ];
the headstock [1] is provided with a main shaft [1-5], a circular grating, a headstock tip [1-1] and a drive plate [1-2], wherein the circular grating comprises a scale grating [1-3] and an indication grating [1-4], the main shaft [1-5] of the headstock [1] is sleeved with the drive plate [1-2] and the indication grating [1-4], and the scale grating [1-3] of the circular grating is fixed on the headstock; a headstock finial [1-1] is arranged on a main shaft [1-5] of the headstock [1], and the headstock finial [1-1] is coaxial with the main shaft;
a tailstock center [4-1], a center sleeve [4-2], a built-in steel sleeve [4-3], a gear shaft [4-5] and a handle [4-4] are arranged on the tailstock [ 4]; a rear frame seat is fixedly connected with a steel sleeve with blades [4-3], a center sleeve [4-2] is arranged in the steel sleeve with blades [4-3], a gear shaft [4-5] is arranged between the steel sleeve with blades [4-3] and the center sleeve [4-2] and is used for matching with a rack on the center sleeve [4-2], the handle [4-4] is fixedly connected with the gear shaft [4-5], a center [4-1] is arranged in the center sleeve [4-2], and the center sleeve [4-2] extends and retracts together with the center [4-1] in the axial direction;
an indicating grating [5-2], a supporting plate [3-4], a supporting plate [3-5], a cam [3-7], a support [3-9], a guide sleeve [3-2] and a measuring head [3-3] are arranged on the measuring frame [3], and the supporting plate [3-4] is arranged on an air floatation guide rail of the lathe bed [2] and can move along the axial direction of the air floatation guide rail; a guide rail is arranged on the supporting plate [3-4], a supporting plate [3-5] is arranged on the guide rail, a screw [3-6] is connected on the supporting plate [3-5], the screw [3-6] is matched with a cam [3-7] on the supporting plate [3-4], a spring is arranged between the supporting plate [3-4] and the supporting plate [3-5], when the cam [3-7] rotates, the screw [3-6] loses support, the supporting plate [3-5] is pulled out under the tension of the spring, a measuring frame [3] on the supporting plate is pulled out at the same time, and the measuring head [3-3] is rapidly withdrawn from a screw rod spiral groove; dovetail guide rails [3-8] are arranged on the supporting plates [3-5], brackets [3-9] are arranged on the dovetail guide rails [3-8], the brackets [3-9] can move on the supporting plates [3-5] along the dovetail guide rails [3-8], the brackets [3-9] are provided with guide sleeves [3-2] and measuring heads [3-3] which are fixedly connected with each other, small screw rods [3-1] are arranged in the guide sleeves [3-2], and the small screw rods [3-1] are rotated to adjust the radial displacement of the measuring heads [3-3 ].
2. The micro ball screw pair stroke error measuring device according to claim 1, wherein the headstock [1], the tailstock [4] and the lathe bed [2] are in full contact with each other, and the axes of the headstock center [1-1] and the tailstock center [4-1] are located on a horizontal line.
3. The microminiature ball screw pair stroke error measuring device of claim 1, wherein the direction of movement of the measuring carriage [3] is parallel to the line of the apices of the head and tail carriages, and the measuring center of the measuring head [3-3] is on the line of the apices of the head and tail carriages.
4. The microminiature ball screw pair stroke error measuring device according to claim 1, wherein a mounting center of the indication grating [1-4] of the circular grating coincides with a rotation center of the dial [1-2 ].
5. The micro ball screw pair stroke error measuring device according to claim 1, wherein the long grating is parallel to the line connecting the top of the head and the tail, and the indication grating [5-2] and the scale grating [5-1] have a gap therebetween and are parallel.
6. The microminiature ball screw pair stroke error measuring device of claim 1, wherein the guide sleeve [3-2] is further provided with a spring, and the spring is sleeved on the small screw rod [3-1 ].
7. A measuring method based on the miniature ball screw pair stroke error measuring device of claim 1, which is characterized by comprising the following steps:
step 1, abutting one end of a tested lead screw against the tip of a headstock, adjusting the position of a tailstock on a lathe bed to fix the other end of the tested lead screw, and clamping the tested lead screw;
step 2, placing the measuring frame at the starting end of the screw rod spiral groove, and adjusting the radial movement of the frame and the measuring head to place the measuring head in the middle diameter of the screw rod spiral groove;
step 3, opening a switch of the measuring device, sending an instruction by an industrial personal computer to control the motor to work, enabling a drive plate to rotate by a motor shaft of the motor through belt transmission and gear transmission, fixedly connecting the drive plate with the indicating grating, and when the drive plate rotates, a lead screw is driven by a shifting fork to rotate at a constant speed, and the indicating grating rotates by the same angle;
step 4, rotating the screw rod, and performing corresponding axial motion on a measuring head positioned in the middle diameter of a spiral groove of the screw rod, wherein the indicating grating is fixedly connected on a supporting plate of the measuring frame to move synchronously;
step 5, collecting the circular grating signals and the long grating signals by the counting card to obtain the rotation angle and the actual stroke of the screw rod;
and 6, determining the stroke error of the tested lead screw by the computer according to the collected lead screw rotating angle and the collected actual stroke.
CN201710454840.9A 2017-06-16 2017-06-16 Micro ball screw pair stroke error measuring device Active CN107063102B (en)

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CN106839981B (en) * 2017-01-05 2019-07-09 江苏瑞安特机械集团有限公司 A kind of lead screw dynamic measuring instrument head frame and its screw rod dynamic measuring instrument
CN206847560U (en) * 2017-06-16 2018-01-05 南京理工大学 A kind of microminiature ball screw assembly, journey error measurement apparatus

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