CN115979135A - Linear guide rail circular arc groove center distance measuring device - Google Patents
Linear guide rail circular arc groove center distance measuring device Download PDFInfo
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- CN115979135A CN115979135A CN202310047713.2A CN202310047713A CN115979135A CN 115979135 A CN115979135 A CN 115979135A CN 202310047713 A CN202310047713 A CN 202310047713A CN 115979135 A CN115979135 A CN 115979135A
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Abstract
The invention discloses a linear guide rail arc groove center distance measuring device, which comprises: a lathe bed. And the tool device is arranged on the lathe bed and used for fixing the guide rail to be measured. The first measuring device is movably connected with the lathe bed. And the second measuring device is connected with the first measuring device in a sliding manner, and the sliding direction is along the width direction of the guide rail to be measured. Is arranged opposite to the first measuring device. And the X-direction driving device is in driving connection with the first measuring device, is in driving connection with the second measuring device and is used for driving the first measuring device to slide relative to the second measuring device. And the driving assembly is in driving connection with the first measuring device and is used for driving the first measuring device to move along the height direction of the measured guide rail. And the Z-direction driving device is in driving connection with the first measuring device. The method of replacing the large and small steel balls by the sliding block is not needed, and time and labor are saved.
Description
Technical Field
The invention relates to the technical field of measuring equipment, in particular to a device for measuring the center distance of an arc groove of a linear guide rail.
Background
As the numerical control machine tool is developed in a direction of high speed and precision, it is required to have a higher level of demand for a linear guide rail which is one of basic functional parts of the machine tool. The linear guide rail is a functional part commonly used in the field of mechanical engineering, and the center distance parameter of the arc groove of the guide rail has decisive influence on the overall precision of equipment.
At present, the measurement of the size of the circular arc groove is only carried out in batch by adopting a cylindrical gear micrometer of a ball head, the initial inspection and the sampling inspection measurement are carried out by using a manual imager, and the pre-tightening force is kept within a certain range after the assembly of the sliding block and the guide rail by adopting a method of replacing a large steel ball and a small steel ball by the sliding block.
The method needs to adjust the pretightening force between the slide block and the guide rail before measurement, steel balls with different sizes need to be replaced frequently, time and labor are wasted, in addition, the measurement error of the center distance of the guide rail of a single slide block is large, the size grade cannot be finely divided, and the batch assembly is difficult.
Disclosure of Invention
In order to solve the technical problem, the invention provides a device for measuring the center distance of an arc groove of a linear guide rail, which comprises:
a lathe bed.
And the tool device is arranged on the lathe bed and used for fixing the guide rail to be measured.
The first measuring device is movably connected with the lathe bed.
And the second measuring device is movably connected with the lathe bed and is in sliding connection with the first measuring device, and the sliding direction is along the width direction of the measured guide rail. Is arranged opposite to the first measuring device.
And the X-direction driving device is in driving connection with the first measuring device and the second measuring device and is used for driving the first measuring device to slide relative to the second measuring device, so that the distance between the first measuring device and the second measuring device is adjusted according to the width of the measured guide rail.
And the driving assembly is in driving connection with the first measuring device and is used for driving the first measuring device to move along the height direction of the measured guide rail, so that the first measuring device and the second measuring device move to two sides of the measured guide rail.
And the Z-direction driving device is in driving connection with the first measuring device and is used for driving the first measuring device to move along the length direction of the measured guide rail, so that the first measuring device moves to different positions on the length of the measured guide rail.
Compared with the prior art, the invention has the following advantages: when the sizes of the grooves on the two sides of the guide rail are measured, the guide rail to be measured is fixed on a tool device to complete the positioning of the guide rail to be measured, the measurement error of the device to be measured is eliminated by using a standard tool, the measurement accuracy of the device is calibrated, and the correctness of measured data when the guide rail is measured is ensured. The method for replacing the large steel ball and the small steel ball by the sliding block is not needed, the pretightening force between the sliding block and the guide rail is not needed to be adjusted, the steel balls are not needed to be replaced, time and labor are saved, the first measuring device and the measuring device are high in precision, the size grade can be finely divided, and batch assembly can be carried out.
More preferably, the Z-direction driving device includes:
and the Z-direction screw rod is rotatably connected with the lathe bed, and the length direction of the Z-direction screw rod is arranged along the length direction of the guide rail to be measured.
The first sliding block is in threaded connection with the Z-direction screw rod and is in sliding connection with the lathe bed, and the first measuring device and the second measuring device are installed on the first sliding block.
And the first driving piece is in driving connection with the Z-direction screw rod and is used for driving the Z-direction screw rod to rotate.
By adopting the technical scheme, the first driving piece drives the Z-direction screw rod to rotate, the Z-direction screw rod drives the first sliding block to slide, and the first sliding block drives the first measuring device and the second measuring device to move along the length direction of the measured guide rail.
Further preferably, the drive assembly includes:
and the Y-direction screw rod is rotationally connected with the first sliding block, and the length direction of the Y-direction screw rod is arranged along the height direction of the guide rail to be measured.
And the second sliding block is in threaded connection with the Y-direction screw rod and is in sliding connection with the first sliding block, and the first measuring device and the second measuring device are arranged on the second sliding block.
And the second driving piece is in driving connection with the Y-direction screw rod and is used for driving the Y-direction screw rod to rotate.
By adopting the technical scheme, the second driving piece drives the Y-direction screw rod to rotate, the Y-direction screw rod drives the second sliding block to slide, and the second sliding block drives the first measuring device and the second measuring device to move along the height direction of the measured guide rail, so that the first measuring device and the second measuring device move to two sides of the measured guide rail.
More preferably, the X-direction driving device includes:
and the cylindrical gear is rotationally connected with the second sliding block, and a rotating shaft of the cylindrical gear is arranged along the height direction of the guide rail to be measured.
And the first rack is in sliding connection with the second sliding block, and the sliding direction of the first rack is arranged along the width direction of the guide rail to be measured and fixedly connected with the first measuring device.
And the second rack is in sliding connection with the second sliding block, and the sliding direction of the second rack is arranged along the width direction of the guide rail to be measured and is fixedly connected with the second measuring device.
And the third driving piece is in driving connection with the cylindrical gear and is used for driving the cylindrical gear to rotate.
The first rack and the second rack are positioned on two sides of the cylindrical gear.
By adopting the technical scheme, the third driving piece drives the cylindrical gear to rotate, the cylindrical gear drives the first rack to slide, the cylindrical gear drives the second rack to slide, the sliding direction of the first rack is opposite to that of the second rack, the first rack drives the first measuring device to be close to or far away from the second measuring device to slide, and the second rack drives the second measuring device to be close to or far away from the first measuring device to slide, so that the approaching and the far-away movement of the first measuring device and the second measuring device are realized.
More preferably, the Z-direction driving device further includes:
and the Z-direction grating ruler is fixedly connected with the lathe bed, and the length direction of the Z-direction grating ruler is arranged along the sliding direction of the first sliding block.
And the Z-direction reading head is fixedly connected with the first sliding block and is matched with the Z-direction grating ruler.
By adopting the technical scheme, the grating ruler can improve the moving precision of the first sliding block, so that the moving precision of the first measuring device and the second measuring device along the length direction of the guide rail is improved.
More preferably, the driving assembly further includes:
and the Y-direction grating ruler is fixedly connected with the first sliding block, and the length direction of the Y-direction grating ruler is arranged along the sliding direction of the second sliding block.
And the Y-direction reading head is fixedly connected with the second sliding block and is matched with the Y-direction grating ruler.
By adopting the technical scheme, the grating ruler can improve the moving precision of the second sliding block, so that the moving precision of the first measuring device and the second measuring device in the height direction of the guide rail is improved.
More preferably, the X-direction driving device further includes:
and the X-direction grating ruler is fixedly connected with the second sliding block, and the length direction of the X-direction grating ruler is arranged along the sliding direction of the first measuring device.
And the X-direction reading head is fixedly connected with the first measuring device and is matched with the X-direction grating ruler.
By adopting the technical scheme, the grating ruler can improve the moving precision of the first measuring device, so that the moving precision of the first measuring device and the second measuring device in the width direction of the guide rail is improved.
Further preferably, the tooling device includes:
and the electromagnetic chuck is fixedly connected with the lathe bed, is in contact fit with the bottom surface of the measured guide rail and is used for adsorbing the measured guide rail.
And the check block is in sliding connection with the lathe bed and is in butt joint with one side of the measured guide rail in the width direction.
And the positioning block is connected with the lathe bed in a sliding way and is in butt joint with the other side of the width direction of the guide rail to be measured.
And the driving assembly is in driving connection with the stop dog and the positioning block and is used for driving the stop dog to be close to the positioning block so as to clamp the tested guide rail and complete the positioning of the tested guide rail.
The dog is equipped with two, and the locating piece is equipped with two, and drive assembly is equipped with two sets ofly, and wherein two dog intervals set up, and two locating piece intervals set up, fix a position the guide rail of being surveyed from two positions of being surveyed guide rail length direction respectively, improve positioning accuracy.
By adopting the technical scheme, when the measured guide rail is positioned, the bottom surface of the measured guide rail is placed on the electromagnetic chuck, the measured guide rail is adsorbed by the electromagnetic chuck, the driving assembly drives the positioning block and the stop block to move close to each other, the measured guide rail is clamped, and the positioning of the measured guide rail is completed.
More preferably, the first measuring device is a laser displacement sensor, and the second measuring device is a laser displacement sensor.
More preferably, the method further comprises:
and the standard block is fixedly connected with the lathe bed, can be replaced according to the measured guide rails with different width sizes, and positions the distance between the first measuring device and the second measuring device so as to improve the measuring precision.
In summary, compared with the prior art, the invention has the following beneficial effects: during measurement, a measurement coordinate system O-X-Y-Z is set, the X direction is the width direction of a guide rail, the Y direction is the height direction of the guide rail, the Z direction is the length direction of the guide rail, an original point is the middle point of the intersection line of the bottom surface of the guide rail and the cross section, the guide rail 4 to be measured is fixed on a tool device to complete the positioning of the guide rail to be measured, meanwhile, before measurement, the measurement system carries out measurement calibration in the X direction, a measurement standard block eliminates the measurement error of the device, the measurement precision of the device is calibrated, the correctness of measured data when the guide rail is measured is ensured, the distance between a first measurement device and a measuring head of a second measurement device is the sum of the measurement distance values of the two measurement devices and the width value of a measuring block, the measurement calibration is completed, the measurement system moves upwards along the Y direction, a first driving part is started, the measurement system moves in the Z direction and stays on a certain cross section of the guide rail to be measured, the measurement system downwards moves along the Y direction to carry out scanning measurement, the measurement system moves along the Z direction to obtain the distance parameters of the left and right profile of the cross section of the linear guide rail to be measured, and the measurement scale are repeatedly carried out on different cross sections of the guide rail to be measured, and the grating scale along the Z direction to be recorded by the Z coordinate system. During the Z-direction dwell, the laser displacement sensor on it moves in the Y-direction, scans the track race profile, and records the profile X-coordinate. The Y coordinate of its profile is recorded by the Y-raster 37. And finally, calculating the midpoint coordinate of the guide rail raceway by utilizing least square fitting to the quarter circular arc, and calculating the center distance parameter condition of the circular arc groove of each section of the guide rail.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is a schematic structural diagram of an X-direction driving device;
FIG. 3 is a schematic structural view of a Y-direction driving device;
FIG. 4 is a schematic structural diagram of a Z-direction driving device;
FIG. 5 is a schematic structural view of the tooling device;
FIG. 6 is a schematic structural view of a guide rail to be tested;
FIG. 7 is an enlarged view of a portion of FIG. 4 at A;
reference numerals: 1-a base; 2-bed body; 3-an electromagnetic chuck; 4-a guide rail to be detected; 5-Z-direction screw rod; 6-Z direction grating ruler; 7-a drive assembly; 8-double guide rails; 9-a mounting frame; 10-a first measuring device; 101-a second measuring device; 11-X direction read head; 12-a first slide; 13-a second drive member; 14-a first drive member; a 15-Z-direction motor frame; a 16-X directional grating; 17-a measuring stand; 18-a drive shaft; 19-a flexible coupling; 20-a motor frame; 21-a third drive member; 22-cylindrical gear; 23-a first rack; 231-a second rack; 24-connecting blocks; a 25-X direction slider; 26-X directional guide rail; 27-a substrate; 28-a gauge stand; a 29-Y directional coupler; 30-a support seat; 31-a second slider; a 32-Y direction screw rod; a 33-Y directional limiting magnet; a 34-Y directional read head; 35-Y direction support; a 37-Y direction grating ruler; a 38-Y direction slider; a 39-Y direction nut seat; a 40-Y guide; a 41-Z-direction limiting magnet; a 42-Z read head; a 43-Z slider; a 44-Z direction nut seat; a 45-Z-direction coupler; 46-standard block; 47-positioning the slide block; 49-a positioning block; 50-stop block.
Detailed Description
The present invention is described in further detail below with reference to fig. 1-7.
As the numerical control machine tool is developed in a direction of high speed and precision, it is required to have a higher level of demand for a linear guide rail which is one of basic functional parts of the machine tool. The linear guide rail is a functional part commonly used in the field of mechanical engineering, and the center distance parameter of the arc groove of the guide rail has decisive influence on the overall precision of equipment.
At present, the size of the circular arc groove is measured in batches only by adopting a cylindrical gear micrometer with a ball head, initial inspection and sampling inspection are carried out by using a manual imager, and the pre-tightening force is kept within a certain range after the slide block and the guide rail are assembled by adopting a method of replacing a large steel ball and a small steel ball by the slide block. The method needs to adjust the pretightening force between the slide block and the guide rail before measurement, steel balls with different sizes need to be frequently replaced, time and labor are wasted, in addition, the measurement error of the size precision of the center distance of the guide rail of a single slide block is large, the size grade cannot be finely divided, and the batch assembly is difficult.
Based on the technical problems, the applicant carries out the following technical scheme conception:
the measured guide rail is fixed at a determined position by using the tool device, and the measuring device is driven to move along the height direction and the length direction of the measured guide rail through the driving device so as to measure the whole groove size of the measured guide rail.
Based on the above concept, the applicant proposes a technical solution of the present application, which is specifically as follows:
as shown in fig. 1, 2, 3, 4, 5, 6 and 7, a device for measuring the center distance of a circular arc groove of a linear guide rail includes: a bed body 2. And the tool device is arranged on the lathe bed 2 and used for fixing the guide rail 4 to be measured. The first measuring device 10 is movably connected with the lathe bed 2. And the second measuring device 101 is movably connected with the bed body 2 and is in sliding connection with the first measuring device 10, and the sliding direction is along the width direction of the measured guide rail 4. Is arranged opposite to said first measuring device 10. And the X-direction driving device is in driving connection with the first measuring device 10 and the second measuring device 101 and is used for driving the first measuring device 10 to slide relative to the second measuring device 101, so that the distance between the first measuring device 10 and the second measuring device 101 is adjusted according to the width of the measured guide rail 4. And the driving assembly is in driving connection with the first measuring device 10 and is used for driving the first measuring device 10 to move along the height direction of the measured guide rail 4, so that the first measuring device 10 and the second measuring device 101 move to two sides of the measured guide rail 4. And the Z-direction driving device is in driving connection with the first measuring device 10 and is used for driving the first measuring device 10 to move along the length direction of the measured guide rail 4, so that the first measuring device 10 moves to different positions on the length of the measured guide rail 4.
When the groove sizes on the two sides of the guide rail are measured, the guide rail 4 to be measured is fixed on a tool device firstly, the positioning of the guide rail 4 to be measured is completed, the measurement error of a standard quick elimination device is firstly utilized, the measurement accuracy of the device is calibrated, and the correctness of measured data when the guide rail is measured is ensured, an X-direction driving device drives a first measuring device 10 to slide relative to a second measuring device 101, the distance between the first measuring device 10 and the second measuring device 101 is adjusted, a driving component drives the first measuring device 10 and the second measuring device 101 to move along the height direction of the guide rail 4 to be measured and move to the two sides of the guide rail to be measured, so that the first measuring device 10 and the second measuring device 101 measure the profiles of the two sides of the guide rail 4 to be measured, a Z-direction driving device is used for driving the first measuring device 10 to move along the length direction of the guide rail 4 to be measured, so that the first measuring device 10 moves to different positions on the length of the guide rail 4 to be measured, and the groove sizes of the two sides of the guide rail 4 to be measured are measured by the first measuring device 10 and the second measuring device 101 in the moving process that the first measuring device 10 and the second measuring device 101 move along the length direction of the guide rail 4 to be measured. The method for replacing the large steel ball and the small steel ball by the sliding block is not needed, the pretightening force between the sliding block and the guide rail is not needed to be adjusted, the steel balls are not needed to be replaced, time and labor are saved, the first measuring device and the measuring device are high in precision, the size grades can be finely divided, and batch assembly can be carried out.
Specifically, the Z-direction driving device includes: and the Z-direction screw rod 5 is rotationally connected with the lathe bed 2, and the length direction of the Z-direction screw rod is arranged along the length direction of the measured guide rail 4. The first sliding block 12 is in threaded connection with the Z-direction screw rod 5 and is in sliding connection with the lathe bed 2, and the first measuring device 10 and the second measuring device 101 are installed on the first sliding block 12. And the first driving piece 14 is in driving connection with the Z-direction screw rod 5 and is used for driving the Z-direction screw rod 5 to rotate. The first driving part 14 drives the Z-direction screw 5 to rotate, the Z-direction screw 5 drives the first sliding block 12 to slide, and the first sliding block 12 drives the first measuring device 10 and the second measuring device 101 to move along the length direction of the measured guide rail 4.
Specifically, the drive assembly includes: and the Y-direction screw rod 32 is rotationally connected with the first sliding block 12, and the length direction of the Y-direction screw rod is arranged along the height direction of the measured guide rail 4. And a second slider 31 which is screwed to the Y-direction screw 32 and slidably connected to the first slider 12, wherein the first measuring device 10 and the second measuring device 101 are mounted on the second slider 31. And the second driving piece 13 is in driving connection with the Y-direction screw rod 32 and is used for driving the Y-direction screw rod 32 to rotate. The second driving piece 13 drives the Y-direction screw rod 32 to rotate, the Y-direction screw rod 32 drives the second sliding block 31 to slide, and the second sliding block 31 drives the first measuring device 10 and the second measuring device 101 to move along the height direction of the measured guide rail 4, so that the first measuring device 10 and the second measuring device move to two sides of the measured guide rail 4.
Specifically, the X-direction driving device includes: and the cylindrical gear 22 is rotationally connected with the second sliding block 31, and the rotating shaft of the cylindrical gear is arranged along the height direction of the measured guide rail 4. And the first rack 23 is connected with the second sliding block 31 in a sliding manner, is arranged along the width direction of the measured guide rail 4 in the sliding direction, and is fixedly connected with the first measuring device 10. And a second rack 231 slidably connected to the second slider 31, the sliding direction of which is set along the width direction of the measured rail 4, and which is fixedly connected to the second measuring device 101. And the third driving part 21 is in driving connection with the cylindrical gear 22 and is used for driving the cylindrical gear 22 to rotate. The first rack 23 and the second rack 231 are located on both sides of the cylindrical gear 22. The third driving member 21 drives the cylindrical gear 22 to rotate, the cylindrical gear 22 drives the first rack 23 to slide, the cylindrical gear 22 drives the second rack 231 to slide, the sliding direction of the first rack 23 is opposite to that of the second rack 231, the first rack 23 drives the first measuring device 10 to be close to or far away from the second measuring device 101 to slide, and the second rack 231 drives the second measuring device 101 to be close to or far away from the first measuring device 10 to slide, so that the close and far movement of the first measuring device 10 and the second measuring device 101 is realized.
Specifically, the Z-direction driving device further includes: and the Z-direction grating ruler 6 is fixedly connected with the lathe bed 2, and the length direction of the Z-direction grating ruler is arranged along the sliding direction of the first sliding block 12. And the Z-direction reading head 42 is fixedly connected with the first sliding block 12 and is matched with the Z-direction grating ruler 6. The grating ruler can improve the moving precision of the first slide block 12, thereby improving the moving precision of the first measuring device 10 and the second measuring device 101 along the length direction of the guide rail.
Specifically, the driving assembly further includes: and the Y-direction grating scale 37 is fixedly connected with the first sliding block 12, and the length direction of the Y-direction grating scale is arranged along the sliding direction of the second sliding block 31. And a Y-direction reading head 34 fixedly connected with the second slider 31 and matched with the Y-direction grating scale 37. The grating ruler can improve the moving precision of the second slider 31, thereby improving the moving precision of the first measuring device 10 and the second measuring device 101 along the height direction of the guide rail.
Specifically, the X-direction driving device further includes: and the X-direction grating ruler 16 is fixedly connected with the second sliding block 31, and the length direction of the X-direction grating ruler is arranged along the sliding direction of the first measuring device 10. And the X-direction reading head 11 is fixedly connected with the first measuring device 10 and is matched with the X-direction grating ruler 16. The grating scale can improve the moving accuracy of the first measuring device 10, thereby improving the moving accuracy of the first measuring device 10 and the second measuring device 101 in the width direction of the guide rail.
Specifically, the tooling device includes: put tool equipment includes: and the electromagnetic chuck 3 is fixedly connected with the lathe bed 2, is in contact fit with the bottom surface of the measured guide rail 4 and is used for adsorbing the measured guide rail 4. And the stop block 50 is in sliding connection with the lathe bed 2 and is in butt joint with one side of the measured guide rail 4 in the width direction. And the positioning block 49 is in sliding connection with the lathe bed 2 and is in butt joint with the other side of the width direction of the measured guide rail 4. And the driving assembly 7 is in driving connection with the stopper 50, is in driving connection with the positioning block 49, and is used for driving the stopper 50 to be close to the positioning block 49 so as to clamp the detected guide rail 4 and complete the positioning of the detected guide rail 4. When the guide rail to be detected is positioned, the bottom surface of the guide rail to be detected 4 is placed on the electromagnetic chuck 3, the guide rail to be detected 4 is adsorbed by the electromagnetic chuck 3, the positioning block 49 and the stop block 50 are driven by the driving assembly 7 to move close to each other, the guide rail to be detected 4 is clamped, and the positioning of the guide rail to be detected 4 is completed. The two stop blocks are arranged, the two positioning blocks are arranged, the two driving assemblies are arranged in two groups, the two stop blocks are arranged at intervals, the two positioning blocks are arranged at intervals, the two positions in the length direction of the guide rail to be measured are used for positioning the guide rail to be measured respectively, and the positioning accuracy is improved.
Specifically, the first measuring device 10 is a laser displacement sensor, and the second measuring device 101 is a laser displacement sensor.
Specifically, the method further comprises the following steps: and the standard block 46 is fixedly connected with the bed body 2, can be replaced according to the measured guide rail 4 with different width sizes, and positions the distance between the first measuring device 10 and the second measuring device 101 so as to improve the measuring precision.
Specifically, referring to fig. 1, a device for measuring the center distance of an arc groove of a linear guide rail includes a first measuring device 10, a second measuring device 101, an X-direction driving device, a driving assembly, a Z-direction driving device, and a tooling device, which are connected in a matching manner.
Specifically, referring to fig. 2, the X-direction driving device includes a third driving member 21, the third driving member 21 is fixed on an X-direction motor frame 20, two ends of the X-direction motor frame 20 are connected to a measuring frame 17, the third driving member 21 is connected to a transmission shaft 18 through a flexible coupling 19, the transmission shaft 18 is in key transmission with a cylindrical gear 22, the cylindrical gear 22 is meshed with two racks, the two racks are respectively connected to two connection blocks 24, the connection blocks 24 are connected to an X-direction slider 25, the X-direction slider 25 is connected to an X-direction guide rail 26, the X-direction guide rail 26 is mounted on a base plate 27, two ends of the base plate 27 are connected to the measuring frame 17, an X-direction grating ruler 16 is mounted on an outer surface of the base plate 27, a measuring instrument support 28 is connected to the connection blocks 24, an X-direction reading head 11 is mounted on an upper end of the measuring instrument support 28 and corresponds to the X-direction grating ruler 16, a laser displacement sensors are mounted on the measuring instrument support 28 and symmetrically distributed, and the two racks are respectively driven by the cylindrical gear 22 to move, so as to implement synchronous reverse movement and distance output in the X-direction.
Specifically, referring to fig. 3, the driving assembly includes a second driving member 13, the second driving member 13 is connected to a second slider 31, a Y-direction coupling 29 is used to connect between the Y-direction lead screw 32 and the second driving member 13, the Y-direction lead screw 32 is connected to a support base 30, the Y-direction lead screw 32 is protected, deformation of the Y-direction lead screw 32 is reduced, the support base 30 is fixed to the second slider 31, the Y-direction lead screw 32 is matched with a Y-direction nut base 39, the Y-direction nut base 39 is fixed to the second slider 31, the second slider 31 is connected to Y-direction sliders 38 which are symmetrically arranged, the two Y-direction sliders 38 are connected to two Y-direction guide rails 40, the two Y-direction guide rails 40 are fixed to the second slider 31 and symmetrically arranged, so that the Y-direction sliders 38 move on the Y-direction guide rails 40, a Y-direction scale 37 is installed on a side surface of the second slider 31, two Y-direction limit magnets 33 are installed up and down on a side surface of the Y-direction scale 37 so as to avoid over travel, one end of the second slider 31 is connected to a Y-direction support 35, a Y-direction reading head 34 is fixed to the Y-direction support 35, and a distance corresponding to the Y-scale 37 is output in a Y-direction.
Specifically, referring to fig. 4, the Z-direction movement measuring mechanism includes a bed 2 connected to a base 1, a Z-direction motor frame 15 fixed to the bed 2, a first driving member 14 fixed to the Z-direction motor frame 15, a Z-direction lead screw 5 connected to the first driving member 14 through a Z-direction coupling 45, the Z-direction lead screw 5 connected to a Z-direction nut seat 44, the Z-direction nut seat 44 connected to a first slider 12, one end of the first slider 12 connected to a driving assembly, the other end of the first slider 12 connected to two Z-direction sliders 43, the two Z-direction sliders 43 symmetrically distributed on the inner surface of the bed 2, the Z-direction sliders 43 matched with double guide rails on the bed 2, the Z-direction guide rails 8 fixedly connected to the bed 2, a Z-direction scale 6 mounted on the upper surface of the bed 2, a Z-direction limit magnet 41 mounted in the length direction of the Z-direction scale 6, a Z-direction reading head 42 mounted on the upper end of the first slider 12 matched with the Z-direction scale 6 on the side of the bed 2, thereby realizing Z-direction distance output.
The X-direction movement and the distance output are realized by combining a grating ruler in the X-direction by utilizing a gear rack principle, the Y-direction movement and the Z-direction movement and the distance output are realized by combining a ball screw with the linear guide rail and the grating ruler in the Y-direction and the Z-direction, the space coordinate is obtained, the mounting frame 9 is fixed on the lathe bed 2 and is aligned with the measured guide rail 4 in parallel, the standard block 46 is fixed on the mounting frame 9, before measurement, the measurement standard block 46 eliminates the measurement error of the device, the measurement precision of the device is calibrated, and the correctness of the measured data when the guide rail is measured is ensured.
Specifically, refer to fig. 5, the tooling device include electromagnetic chuck 3, electromagnetic chuck 3 lower surface is connected with the convex surface of lathe bed 2, electromagnetic chuck 3 upper surface and measured guide rail 4 produce magnetism and inhale, two drive assembly 7 of 4 both ends installations of measured guide rail, positioning slider 47 and locating piece 49 among the drive assembly 7 are connected, locating piece 49 is along being measured 4 length direction symmetric distribution of guide rail, symmetric locating piece 49 is to being measured 4 side direction location of guide rail, be connected with dog 50 between measured guide rail 4 and the locating piece 49, the positioning error of adjustment locating piece 49.
Principle and process of operation
Referring to fig. 1, 2, 3, 4, 5, 6 and 7, during measurement, a measurement coordinate system O-X-Y-Z is set first, the X direction is the width direction of the guide rail, the Y direction is the height direction of the guide rail, the Z direction is the length direction of the guide rail, the origin is the midpoint of the intersection line of the bottom surface of the guide rail and the cross section, the guide rail 4 to be measured is fixed on a tooling device to complete the positioning of the guide rail 4 to be measured, meanwhile, before measurement, the measurement system performs measurement calibration in the X direction, the measurement standard block 46 eliminates the device measurement error, corrects the device measurement accuracy to ensure the correctness of the measured data when measuring the guide rail, the distance between the first measurement device 10 and the second measurement device 101 measuring head is the sum of the measurement distance values of the two measurement devices and the width value of the measurement block, the measurement calibration is completed, the measurement system moves upwards along the Y direction, the first driving part 14 is started, the measurement system moves in the Z direction to stay on a section of the guide rail 4 to be measured, the measurement system moves downwards along the Y direction to perform scanning measurement, the measurement system moves along the Z direction, the cross section moves along the Z direction to obtain a linear section, and the linear section, the grating ruler is repeatedly recorded by the measurement parameters, and the grating ruler is recorded in the Z direction, and the measurement parameters are recorded. During the Z-direction dwell, the laser displacement sensor on it moves in the Y-direction, scans the track race profile, and records the profile X-coordinate. The Y coordinate of its profile is recorded by the Y-raster 37. And finally, calculating by utilizing least square fitting on the 4 quarter circular arcs to obtain the midpoint coordinate of the raceway of the guide rail, and calculating the center distance parameter condition of the circular arc groove of each section of the guide rail.
The present embodiment is only for explaining the invention, and it is not limited to the invention, and those skilled in the art can make modifications to the embodiment as necessary without inventive contribution after reading the present specification, but all of them are protected by the patent law within the scope of the present invention.
Claims (10)
1. The utility model provides a linear guide circular arc groove centre-to-centre spacing measuring device which characterized in that includes:
a bed body (2);
the tool device is arranged on the lathe bed (2) and used for fixing the guide rail (4) to be detected;
the first measuring device (10) is movably connected with the lathe bed (2);
the second measuring device (101) is connected with the first measuring device (10) in a sliding mode, and the sliding direction is along the width direction of the guide rail (4) to be measured; is arranged opposite to the first measuring device (10);
the X-direction driving device is in driving connection with the first measuring device (10) and the second measuring device (101) and is used for driving the first measuring device (10) to slide relative to the second measuring device (101), so that the distance between the first measuring device (10) and the second measuring device (101) is adjusted according to the width of the guide rail (4) to be measured;
the driving assembly is in driving connection with the first measuring device (10) and is used for driving the first measuring device (10) to move along the height direction of the measured guide rail (4), so that the first measuring device (10) and the second measuring device (101) move to different coordinates on two sides of the measured guide rail (4);
and the Z-direction driving device is in driving connection with the first measuring device (10) and is used for driving the first measuring device (10) to move along the length direction of the measured guide rail (4), so that the first measuring device (10) moves to different positions on the length of the measured guide rail (4).
2. The device for measuring the center distance of the circular arc groove of the linear guide rail according to claim 1, wherein the Z-direction driving device comprises:
the Z-direction screw rod (5) is rotationally connected with the lathe bed (2), and the length direction of the Z-direction screw rod is arranged along the length direction of the guide rail (4) to be measured;
the first sliding block (12) is in threaded connection with the Z-direction screw rod (5) and is in sliding connection with the lathe bed (2), and the first measuring device (10) and the second measuring device (101) are installed on the first sliding block (12);
the first driving piece (14) is in driving connection with the Z-direction screw rod (5) and is used for driving the Z-direction screw rod (5) to rotate.
3. The linear guide arc groove center distance measuring device of claim 2, wherein the driving assembly comprises:
the Y-direction screw rod (32) is rotationally connected with the first sliding block (12), and the length direction of the Y-direction screw rod is arranged along the height direction of the guide rail (4) to be detected;
the second sliding block (31) is in threaded connection with the Y-direction screw rod (32) and is in sliding connection with the first sliding block (12), and the first measuring device (10) and the second measuring device (101) are mounted on the second sliding block (31);
and the second driving piece (13) is in driving connection with the Y-direction screw rod (32) and is used for driving the Y-direction screw rod (32) to rotate.
4. The device for measuring the center distance of the circular arc groove of the linear guide rail according to claim 3, wherein the X-direction driving device comprises:
the cylindrical gear (22) is rotationally connected with the second sliding block (31), and a rotating shaft of the cylindrical gear is arranged along the height direction of the guide rail (4) to be measured;
the first rack (23) is connected with the second sliding block (31) in a sliding mode, the sliding direction of the first rack is arranged along the width direction of the guide rail (4) to be measured, and the first rack is fixedly connected with the first measuring device (10);
the second rack (231) is connected with the second sliding block (31) in a sliding mode, the sliding direction of the second rack is arranged along the width direction of the guide rail (4) to be measured, and the second rack is fixedly connected with the second measuring device (101);
the third driving part (21) is in driving connection with the cylindrical gear (22) and is used for driving the cylindrical gear (22) to rotate;
the first rack (23) and the second rack (231) are positioned on two sides of the cylindrical gear (22).
5. The apparatus of claim 4, wherein the Z-direction driving device further comprises:
the Z-direction grating ruler (6) is fixedly connected with the lathe bed (2), and the length direction of the Z-direction grating ruler is arranged along the sliding direction of the first sliding block (12);
and the Z-direction reading head (42) is fixedly connected with the first sliding block (12) and is matched with the Z-direction grating ruler (6).
6. The linear guide arc groove center distance measuring device of claim 5, wherein the driving assembly further comprises:
the Y-direction grating ruler (37) is fixedly connected with the first sliding block (12), and the length direction of the Y-direction grating ruler is arranged along the sliding direction of the second sliding block (31);
and the Y-direction reading head (34) is fixedly connected with the second sliding block (31) and is matched with the Y-direction grating ruler (37).
7. The apparatus for measuring the center distance of the circular arc groove of the linear guide according to claim 6, wherein the X-direction driving means further comprises:
the X-direction grating ruler (16) is fixedly connected with the second sliding block (31), and the length direction of the X-direction grating ruler is arranged along the sliding direction of the first measuring device (10);
and the X-direction reading head (11) is fixedly connected with the first measuring device (10) and is matched with the X-direction grating ruler (16).
8. The device for measuring the center distance of the circular arc groove of the linear guide rail according to claim 1, wherein the tooling device comprises:
the electromagnetic chuck (3) is fixedly connected to the lathe bed (2), is in contact fit with the bottom surface of the guide rail (4) to be detected and is used for adsorbing the guide rail (4) to be detected;
the stop block (50) is connected with the lathe bed (2) in a sliding way and is in butt joint with one side of the measured guide rail (4) in the width direction;
the positioning block (49) is connected with the lathe bed (2) in a sliding way and is in butt fit with the other side of the measured guide rail (4) in the width direction;
the driving assembly (7) is in driving connection with the stop block (50), is in driving connection with the positioning block (49) and is used for driving the stop block (50) to be close to the positioning block (49), so that the detected guide rail (4) is clamped, and the positioning of the detected guide rail (4) is completed.
9. The device for measuring the center distance of the circular arc groove of the linear guide rail according to claim 1, wherein the first measuring device (10) is a laser displacement sensor, and the second measuring device (101) is a laser displacement sensor.
10. The device for measuring the center distance of the circular arc groove of the linear guide rail according to claim 1, further comprising:
and the standard block (46) is fixedly connected with the lathe bed (2) and is used for calibrating the measurement precision.
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| CN202310047713.2A CN115979135B (en) | 2023-01-31 | 2023-01-31 | Linear guide rail circular arc groove center distance measuring device |
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| CN202310047713.2A CN115979135B (en) | 2023-01-31 | 2023-01-31 | Linear guide rail circular arc groove center distance measuring device |
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