A measuring device for ultra-precision positioning of bearing crown tapered rollers

Abstract

The application discloses a kind of bearing convexity conical roller super-precision positioning attitude measuring device, including measuring table, a pair of fixed base, a pair of adjustable base, X direction measuring unit, Y direction measuring unit, Z direction measuring unit and digital display module.Measuring table is rectangular frame structure;A pair of fixed base and a pair of adjustable base are correspondingly installed between the bottom surface of two Y direction battens of measuring table and the two bearing seats of main and auxiliary guide rollers.A pair of X direction guide rails, X direction displacement drag plate, X direction screw mechanism and X direction grating ruler are included in X direction measuring unit.A pair of Y direction guide rails, Y direction displacement drag plate, Y direction screw mechanism and Y direction grating ruler are included in Y direction measuring unit.Z direction base, Z direction adjusting screw, micrometer seat 72 and electronic micrometer 74 are included in Z direction measuring unit.Digital display module is connected with X direction grating ruler, Y direction grating ruler and electronic micrometer by signal line respectively.The application can accurately obtain the positioning attitude of roller during super-precision grinding.

Description

Technical Field

[0001] This invention relates to a measuring device for ultra-precision positioning of a tapered roller bearing convexity. Background Technology

[0002] Rolling elements are one of the five major components of a rolling bearing (inner ring, outer ring, rolling elements, cage, and lubricant), and their quality directly affects the bearing's precision and service life. Tapered rollers are the rolling elements in a rolling bearing, transmitting motion and load within the narrow space between the inner and outer rings, and are a key component affecting the service life of tapered roller bearings.

[0003] Currently, the widely used final processing method is fixed-post through-feed ultrafine grinding. Through-feed ultrafine grinding has the advantages of high production efficiency and stable roller quality. The working principle of the fixed-post through-feed ultrafine grinding machine for tapered rollers is as follows: Figure 1 As shown. Figure 1 In this design, the main guide roller 1A and the auxiliary guide roller 1B are horizontally arranged with their axes parallel to each other, and they rotate in the same direction at the same speed around their respective axes. The outer surface of the main guide roller 1A has a helical flange 11, and the outer surface of the auxiliary guide roller 1B has a helical groove 12. A roller 10 is placed between the main guide roller 1A and the auxiliary guide roller 1B. The shapes of the main guide roller 1A and the auxiliary guide roller 1B control the attitude and drive the rotation of the roller 10. The spherical base surface of the main guide roller 1A with the helical flange 11 contacts the large end of the roller 10. The helical flange 11 drives the roller 10 to continuously penetrate along the axis of the leading guide roller, and also isolates two adjacent rollers 10. This allows the roller 10, which is conveyed by the automatic loading mechanism to the area between the main guide roller 1A and the auxiliary guide roller 1B, to rotate around its own axis while simultaneously penetrating forward along the axis of the main guide roller 1A and the auxiliary guide roller 1B. A row of oilstones 2 oscillates at a high frequency with small amplitude along the longitudinal direction, and each oilstone applies constant pressure to the outer surface of each roller 10, achieving ultra-precision machining of the outer surface of the roller 10. The relative positions of the tapered roller 10, the main guide roller 1A, the auxiliary guide roller 1B, and the oilstones 2 in the longitudinal vertical plane are as follows: Figure 2 As shown. Because the outer cylindrical surface of roller 10 needs to be machined using ultra-precision technology, as... Figure 3 The surface convexity (logarithmic curve) shape shown (where Lwe is the length of roller 100 and δ is the convexity of roller 10) necessitates the processing of the surfaces of the main and auxiliary guide rollers to achieve the desired shape. Figure 4The special cross-sectional shape shown is as follows: T is the helical lead of the main / auxiliary guide roller; B is the width of the helical flange of the main guide roller; ρ is the roll angle of the main and auxiliary guide rollers (the roll angle ρ of the main and auxiliary guide rollers is different); C is the height of the helical flange of the main guide roller; Dw is the diameter of the main / auxiliary guide roller. The roll angle of the main and auxiliary guide rollers is one of the main parameters controlling the ultra-precision grinding posture of the convexity roller 10 (the angle between the roller and the axis of the main and auxiliary guide rollers in the horizontal direction). At the same time, the center distance of the main and auxiliary guide rollers must also be adjusted so that the center height of the roller 100 and the center height of the main and auxiliary guide rollers form a certain angle, such as... Figure 5a As shown (A is the center distance between the main and auxiliary guide rollers; β is the contact angle between the small end of the roller and the main and auxiliary guide rollers; d is the diameter of the small end of the roller; Dw / 2 is the radius of the main and auxiliary guide rollers). The roller is positioned by the support of the surfaces of the main and auxiliary guide rollers. Since the surfaces of the main and auxiliary guide rollers have been precision ground, the installation and positioning of the main and auxiliary guide rollers become the main factors affecting the positioning posture of the roller. In the actual debugging process, the contact angle β between the small end of the roller and the main and auxiliary guide rollers is changed by controlling the center distance A of the main and auxiliary guide rollers and their axis parallelism, thereby adjusting the positioning posture of the roller.

[0004] Currently, there is relevant research in China on the precision measurement of the grinding roll profile angle of the main and auxiliary guide rollers. Bearing roller manufacturers have relatively mature measurement technologies for the main and auxiliary guide rollers. However, in the actual processing and adjustment process, the main and auxiliary guide rollers need to be installed on the bearing housing of the ultra-precision grinding machine. The machining accuracy and installation positioning accuracy of the main and auxiliary guide rollers themselves will be reflected in the posture of the ultra-precision roller, thus affecting the outer convexity shape of the roller. For a detailed schematic diagram of the ultra-precision grinding posture of the convexity roller, please see... Figure 5b , Figure 5c , Figure 5d . Figure 5d In this context, α is the semi-cone angle of the tapered roller; β is the angle between the generatrix of the roller and the straight line of the oilstone oscillation; E is the length of the roller; A and H are the installation and adjustment parameters for the main and auxiliary guide rollers. Figure 5d A is the half-center distance between the main and auxiliary guide rollers; H is the height of the roller's center relative to the centers of the main and auxiliary guide rollers; φ is the contact angle between the roller and the main and auxiliary guide rollers; the X, Y, Z coordinate system is the positioning coordinate system (reference coordinate system) of the single helical lead of the main and auxiliary guide rollers, and the X”, Y”, Z” coordinate system is the positioning coordinate system of the roller.

[0005] Currently, the positioning posture of the rollers cannot be accurately measured due to the difficulty in measuring the ultra-precision grinding, which makes the installation and adjustment of the main and auxiliary guide rollers very difficult. Technicians usually judge the adjustment amount of the main and auxiliary guide rollers by the outer circle contour shape of the rollers after ultra-precision grinding (measured by a profilometer). This process often leads to the scrapping of a small number of products and requires repeated testing and adjustment, resulting in low efficiency. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects of the prior art and provide a measuring device for the ultra-precision positioning posture of a bearing crown tapered roller. It can accurately obtain the positioning posture of the roller during ultra-precision grinding and greatly improve the efficiency of ultra-precision guide roller installation, positioning and debugging.

[0007] The objective of this invention is achieved as follows: a measuring device for ultra-precision positioning of a tapered roller bearing crown, comprising a measuring stage, a pair of fixed bases, a pair of adjustable bases, an X-axis measuring unit, a Y-axis measuring unit, a Z-axis measuring unit, and a digital display module; wherein,

[0008] The measuring platform has a rectangular frame structure and includes two X-axis slats and two Y-axis slats;

[0009] The top of a pair of fixed bases is mounted on the bottom surface of a Y-axis strip of the measuring table, and the lower ends of the pair of fixed bases are respectively set on the bearing seat at one end of the main guide roller and the bearing seat at one end of the auxiliary guide roller of the ultrafine grinding machine.

[0010] The top of a pair of adjustable bases is mounted on the bottom surface of another Y-axis strip of the measuring table, and the lower ends of the pair of adjustable bases are respectively located on the other end bearing seat of the main guide roller and the other end bearing seat of the auxiliary guide roller of the ultrafine grinding machine.

[0011] The X-axis measuring unit includes a pair of X-axis guide rails, an X-axis displacement slide, an X-axis lead screw mechanism, and an X-axis grating ruler. The pair of X-axis guide rails are fixed one-to-one along the length of the measuring platform to the top surfaces of two X-axis strips. The X-axis displacement slide includes a horizontal plate and a vertical plate fixed to the bottom of the horizontal plate. Two X-axis sliders, corresponding to and adapted to the pair of X-axis guide rails, are fixed to the bottom surface of the horizontal plate, allowing the X-axis displacement slide to be movably mounted on the pair of X-axis guide rails via the pair of X-axis sliders. The X-axis lead screw mechanism includes an X-axis lead screw mounted parallel to the pair of X-axis guide rails on the top surface of the measuring platform and close to one of the X-axis guide rails, an X-axis lead screw nut fixed to the bottom surface of the X-axis displacement slide, and a handwheel or knob mounted at one end of the X-axis lead screw. The X-axis grating ruler is mounted parallel to the pair of X-axis guide rails on the top surface of the measuring platform and close to the other X-axis guide rail.

[0012] The Y-axis measuring unit includes a pair of Y-axis guide rails, a Y-axis displacement slide, a Y-axis lead screw mechanism, and a Y-axis grating ruler. The pair of Y-axis guide rails are fixed one above the other on the front surface of the vertical plate of the X-axis displacement slide. A Y-axis slider adapted to the pair of Y-axis guide rails is fixed to the upper and lower parts of the rear surface of the Y-axis displacement slide, allowing the Y-axis displacement slide to be movably mounted on the pair of Y-axis guide rails via the pair of Y-axis sliders. The Y-axis lead screw mechanism includes a Y-axis lead screw fixed parallel to the pair of Y-axis guide rails on the front surface of the vertical plate of the X-axis displacement slide and located between the pair of Y-axis guide rails, a Y-axis lead screw nut fixed in the middle of the rear surface of the Y-axis displacement slide, and a handwheel or knob installed at one end of the Y-axis lead screw. The Y-axis grating ruler is mounted parallel to the pair of Y-axis guide rails on the lower part of the front surface of the vertical plate of the X-axis displacement slide.

[0013] The Z-axis measuring unit includes a Z-axis base, a Z-axis adjusting screw, a dial indicator base 72, and an electronic dial indicator 74; wherein, the Z-axis base is fixed to the front surface of the Y-axis displacement slide; the Z-axis adjusting screw is fixed to the bottom surface of the Z-axis base; one end of the dial indicator base is mounted on the Z-axis adjusting screw via two fine-tuning nuts; the meter head of the electronic dial indicator is mounted on the other end of the dial indicator base via a set screw;

[0014] The digital display module is located on one side of the measuring platform and is connected to the X-axis grating ruler, Y-axis grating ruler and electronic micrometer via signal lines.

[0015] The above-mentioned measuring device for ultra-precision positioning of bearing convex tapered roller bearings includes a bottom mounting groove in the shape of an inverted isosceles trapezoid that is opened along the length of the Y-direction strip on the bottom surface of the two Y-direction strips of the measuring table, and a top mounting groove that leads to the top surface of the Y-direction strip is opened in the middle of the bottom surface of the bottom mounting groove along the length of the Y-direction strip.

[0016] The fixed base includes a long column and an inverted V-shaped bracket integrally connected to the lower end of the long column. The top surface of the long column is provided with an upper flange that is adapted to the bottom mounting groove on the Y-direction plate of the measuring platform. A threaded blind hole is opened in the center of the top surface of the upper flange. After each of the two fixed bases is inserted into the bottom mounting groove on one of the Y-direction plates of the measuring platform through the upper flange on the top surface of the long column, the two fixed bases are fixed to the bottom of the measuring platform by two top bolts provided in the top mounting groove.

[0017] The adjustable base includes a base locking block, a short column, and an inverted V-shaped bracket integrally connected to the lower end of the short column. The top surface of the base locking block has an upper flange that matches the bottom mounting groove on the Y-axis strip of the measuring platform, and a threaded blind hole is formed at the center of the top surface of the upper flange. The bottom surface of the base locking block has an inverted T-shaped lower flange, and a semi-circular threaded through groove is formed laterally in the center of the bottom surface of the lower flange. The top surface of the short column has a connecting groove that matches the lower flange on the bottom surface of the base locking block, and the bottom of the connecting groove... A lower semicircular threaded through groove is opened horizontally on the surface to match the upper semicircular threaded through groove on the base locking block; after the upper flange of the base locking block of a pair of adjustable bases is embedded into the bottom mounting groove on another Y-direction plate of the measuring table, the two base locking blocks are fixed to the bottom of the measuring table by two top bolts set in the top mounting groove. The lower flanges of the two base locking blocks are correspondingly embedded in the connecting grooves of the two short columns, and then connected to the threaded through hole formed by the upper semicircular threaded through groove and the lower semicircular threaded through groove by locking bolts.

[0018] The aforementioned measuring device for ultra-precision positioning of bearing convex tapered rollers includes a limiting step on the outer side of the lower end face of the inverted V-shaped holder.

[0019] The measuring device for ultra-precision positioning of bearing convex tapered rollers of the present invention has the following characteristics:

[0020] (1) The three-dimensional positioning posture of the roller can be re-measured with high precision after the main and auxiliary guide rollers of the ultra-precision grinding machine are installed. The positioning posture of the roller is used as the result guide to ensure that the outer circle convexity shape of the roller after adjustment meets the technical requirements at one time. At the same time, the measuring device can realize the adjustment and measurement during the positioning adjustment process of the main and auxiliary guide rollers, which greatly improves the positioning adjustment efficiency of the main and auxiliary guide rollers of the ultra-precision grinding machine.

[0021] (2) Compared with the existing technology, the outer circle contour shape after ultra-precision grinding of the roller is tested and the adjustment test is carried out repeatedly according to the detection results of the contour instrument. The measuring device of the present invention can accurately measure the positioning posture of the actual roller. When the positioning posture of the roller meets the technical requirements, the outer circle convexity shape of the product after ultra-precision grinding can be guaranteed to be qualified in one go, which greatly shortens the time spent on repeated testing and detection and greatly improves the efficiency of ultra-precision guide roller installation, positioning and debugging.

[0022] (3) The measuring device of the present invention can achieve a measurement accuracy of 0.001mm for the three-dimensional attitude coordinate position of the roller, thereby obtaining a high-precision roller positioning attitude, avoiding product scrapping during the testing process of existing technologies, and obtaining better product quality. Attached Figure Description

[0023] Figure 1This is a perspective view of the bearing crown tapered roller on a through-type ultra-precision grinding machine;

[0024] Figure 2 This is a diagram showing the positional relationship between the bearing crown tapered roller, the guide roller, and the whetstone in the longitudinal vertical plane during ultra-precision machining.

[0025] Figure 3 This is a schematic diagram of the structure of a tapered roller bearing with a high crown.

[0026] Figure 4 This is a cross-sectional view of the main roller on a through-type ultra-precision grinding mill;

[0027] Figure 5a This is a side view showing the positional relationship between the main and auxiliary guide rollers and the rollers during the ultra-precision grinding process;

[0028] Figure 5b This is a front view of the ultra-precision posture of the roller during the ultra-precision grinding process;

[0029] Figure 5c This is a top view of the ultra-precision posture of the roller during the ultra-precision grinding process;

[0030] Figure 5d This is a three-dimensional ultra-precision posture diagram of the roller during the ultra-precision grinding process;

[0031] Figure 6 This is a front view of the measuring device of the present invention;

[0032] Figure 7 This is a perspective view of the X-axis measuring unit of the measuring device of the present invention;

[0033] Figure 8a This is a perspective view of the fixed base in the measuring device of the present invention;

[0034] Figure 8b This is a perspective view of the adjustable base in the measuring device of the present invention;

[0035] Figure 9 This is a perspective view of the Y-axis measuring unit in the measuring device of the present invention;

[0036] Figure 10 This is a perspective view of the Z-axis measuring unit in the measuring device of the present invention;

[0037] Figure 11 This is a rear view of the measuring device of the present invention during operation;

[0038] Figure 12 This is a front view of the measuring device of the present invention during operation;

[0039] Figure 13 This is the front side view of the measuring device of the present invention during operation. Detailed Implementation

[0040] The invention will now be further described with reference to the accompanying drawings.

[0041] Please see Figures 6 to 13 The measuring device for ultra-precision positioning of bearing convex tapered rollers of the present invention includes a measuring table 3, a pair of fixed bases 4A, a pair of adjustable bases 4B, an X-axis measuring unit 5, a Y-axis measuring unit 6, a Z-axis measuring unit 7, and a digital display module 9.

[0042] The measuring platform 3 has a rectangular frame structure and includes two X-direction slats 31 and two Y-direction slats 32. On the bottom surface of each of the two Y-direction slats 32, a bottom mounting groove 33 in the shape of an inverted isosceles trapezoid is opened along the length direction of the Y-direction slat 32. At the middle of the bottom surface of the bottom mounting groove 33, a top mounting groove 34 is opened along the length direction of the Y-direction slat 32, leading to the top surface of the Y-direction slat 32.

[0043] A pair of fixed bases 4A are mounted on the bottom surface of a Y-axis slat 32 of the measuring table 3. The lower ends of the pair of fixed bases 4A are correspondingly located on the bearing seats 1C of the main guide roller and the auxiliary guide roller of the ultrafine grinding machine. The fixed base 4A includes a long column 41 and an inverted V-shaped bracket 42 integrally connected to the lower end of the long column 41. The top surface of the long column 41 is provided with an upper flange 40 that matches the bottom mounting groove 33 on the Y-axis slat 32 of the measuring table 3. A threaded blind hole 400 is opened at the center of the top surface; a pair of fixed bases 4A are each embedded into the bottom mounting groove 33 on a Y-direction strip 32 of the measuring table 3 through the upper flange 40 on the top surface of the long column 41, and then fixed to the bottom of the measuring table 3 by two top bolts 45 in the top mounting groove 34; the lower end face of the inverted V-shaped card seat 42 is provided with a limiting step 420 to ensure that the pair of fixed bases 4A are positioned one-to-one on the shaft end of the main guide roller 1A and the shaft end of the auxiliary guide roller 1B.

[0044] The top of a pair of adjustable bases 4B is mounted on the bottom surface of another Y-direction slat 32 of the measuring table 3. The lower ends of the pair of adjustable bases 4B are respectively located on the other end bearing seat 1C of the main guide roller and the other end bearing seat 1C of the auxiliary guide roller of the ultrafine grinding machine. The adjustable base 4B includes a base locking block 43, a short column 44, and an inverted V-shaped bracket 42 integrally connected to the lower end of the short column 44. The top surface of the base locking block 43 has an upper flange 40 that matches the bottom mounting groove 33 on the Y-direction strip 32 of the measuring platform 3. A threaded blind hole 400 is formed at the center of the top surface of the upper flange 40. The bottom surface of the base locking block 43 has an inverted T-shaped lower flange 430, with a semi-circular threaded through groove 431 laterally formed in the middle of the bottom surface of the lower flange 430. The top surface of the short column 44 has a connecting groove 440 that matches the lower flange 430 on the bottom surface of the base locking block 43. A lower semicircular threaded through groove 441 is horizontally opened on the surface to match the upper semicircular threaded through groove 431 on the base locking block 4; after the upper flange 40 of the base locking block 43 of the pair of adjustable bases 4B is embedded into the bottom mounting groove 33 on another Y-direction plate 32 of the measuring table 3, the two base locking blocks 43 are fixed to the bottom of the measuring table 3 by two top bolts 45 provided in the top mounting groove 34. The lower flange 430 of the two base locking blocks 43 are correspondingly embedded in the connecting groove 440 of the two short columns 44, and then connected to the threaded through hole formed by the upper semicircular threaded through groove 431 and the lower semicircular threaded through groove 441 by locking bolts 46. The lower end face of the inverted V-shaped card holder 42 is provided with a limiting step 420 to ensure that the pair of adjustable bases 4B are positioned correspondingly at the shaft end of the main guide roller 1A and the shaft end of the auxiliary guide roller 1B.

[0045] The X-axis measuring unit 5 includes a pair of X-axis guide rails 51, an X-axis displacement slide, an X-axis lead screw mechanism, and an X-axis grating ruler 54. The pair of X-axis guide rails 51 are fixed one-to-one along the length of the measuring platform 2 to the top surfaces of two X-axis strips 31 on the measuring platform 3. The X-axis displacement slide has a T-shaped longitudinal section and includes a horizontal plate 501 and a vertical plate 502 fixed to the center of the bottom of the horizontal plate 501. Two X-axis sliders 52, corresponding to and adapted to the pair of X-axis guide rails 51, are fixed to the bottom surface of the horizontal plate 501, allowing the X-axis displacement slide to... 50 is movably mounted on a pair of X-axis guide rails 51 via a pair of X-axis sliders 52; the X-axis lead screw mechanism includes an X-axis lead screw 53 mounted parallel to the pair of X-axis guide rails 51 on the top surface of the measuring table 3 and close to one of the X-axis guide rails 51, an X-axis lead screw nut fixed on the bottom surface of the horizontal plate 501 of the X-axis displacement slide, and a handwheel or knob 54 mounted on one end of the X-axis lead screw 53; the X-axis grating ruler 55 is mounted parallel to the pair of X-axis guide rails 51 on the top surface of one X-axis strip 31 of the measuring table and close to the other X-axis guide rail 51.

[0046] The Y-axis measuring unit 6 includes a pair of Y-axis guide rails 61, a Y-axis displacement slide plate 60, a Y-axis lead screw mechanism, and a Y-axis grating ruler 65. The pair of Y-axis guide rails 61 are fixed one above the other on the front surface of the vertical plate 502 of the X-axis displacement slide plate. A Y-axis slider 62 adapted to the pair of Y-axis guide rails 61 is fixed on the upper and lower parts of the rear surface of the Y-axis displacement slide plate 60, so that the Y-axis displacement slide plate 60 is movably mounted on the pair of Y-axis guide rails 61 via the pair of Y-axis sliders 62. The Y-axis lead screw mechanism includes a Y-axis lead screw 63 fixed parallel to the pair of Y-axis guide rails 61 on the front surface of the vertical plate 502 of the X-axis displacement slide plate and located in the middle of the pair of Y-axis guide rails 61, a Y-axis lead screw nut fixed in the middle of the rear surface of the Y-axis displacement slide plate 60, and a handwheel or knob 64 installed at one end of the Y-axis lead screw 63. The Y-axis grating ruler 65 is installed parallel to the pair of Y-axis guide rails 61 on the lower part of the front surface of the vertical plate 502 of the X-axis displacement slide plate.

[0047] The Z-axis measuring unit 7 includes a Z-axis base 70, a Z-axis adjusting screw 71, a dial indicator base 72, and an electronic dial indicator 74. The Z-axis base 70 is fixed to the front surface of the Y-axis displacement slide 60. The Z-axis adjusting screw 71 is fixed to the bottom surface of the Z-axis base 70. One end of the dial indicator base 72 is mounted on the Z-axis adjusting screw 71 by two fine-tuning nuts 73. The meter head of the electronic dial indicator 74 is mounted on the other end of the dial indicator base 72 by a set screw 75.

[0048] The digital display module 8 is located on one side of the measuring table 3 and is connected to the X-axis grating ruler 55, the Y-axis grating ruler 65 and the electronic micrometer 74 via signal lines.

[0049] The measuring device for ultra-precision positioning of tapered roller bearings of the present invention is mainly used in the installation and positioning debugging process of the main and auxiliary guide rollers of an ultra-precision grinding machine for tapered rollers. The measuring device uses the outer circles of the four bearing seats 1C at both ends of the main guide roller 1A and auxiliary guide roller 1B of the ultra-precision grinding machine as a reference for positioning. The lower parts of a pair of fixed bases 4A and a pair of adjustable bases 4B have a 90° V-shaped mating surface with the outer circle of the bearing seat 1C. The pair of fixed bases 4A are axially fixed, while the pair of adjustable bases 4B can be axially displaced and locked by locking screws 46, thus completely fixing the measuring device. Each measuring unit consists of a displacement mechanism, a high-precision linear guide, a grating ruler, an electronic dial indicator, and a digital display module. The displacement drive of the X-axis displacement slide and the Y-axis displacement slide 60 is manual (lead screw + knob). The three-dimensional coordinate data of the roller being measured are measured by the X-axis grating ruler 55, the Y-axis grating ruler 65, and the electronic dial indicator 74, and then displayed by the digital display module 8.

[0050] In the actual measurement process, at least three measuring points are selected: the small end, the middle of the length, and the large end of the roller 10. Since the X and Y coordinates of the measuring points on the roller 10 need to be determined based on the different lengths of the roller 10 being measured, the diameters of the three measuring points, and the expected ultra-precision convexity measurement, the parameters of the X and Y positions between the measuring points are known quantities. By measuring the Z-axis value of the roller 10 at different measuring points using an electronic dial indicator 74 (contact measurement), the three-dimensional attitude data of the roller 10 in the current state of the main guide roller 1A and the auxiliary guide roller 1B can be obtained. The application process of the measuring device of this invention in the positioning and debugging of the main guide roller 1A and the auxiliary guide roller 1B is as follows (see...). Figure 12 and Figure 13 And in conjunction with reference Figure 5a ):

[0051] 1) Based on the measured roll angles (known) of the main guide roller 1A and the auxiliary guide roller 1B, the theoretical value A0 of the center distance between the main guide roller 1A and the auxiliary guide roller 1B can be calculated. The initial installation and positioning of the main and auxiliary guide rollers shall be carried out according to A0.

[0052] 2) After the main guide roller 1A and the auxiliary guide roller 1B are initially positioned, the measuring device of the present invention is installed and the positioning and fixing of the adjustable base 4B is completed;

[0053] 3) Adjust the X and Y coordinates of each measuring point according to the length of the different rollers 10 being measured, the diameter of the three measuring points, and the expected ultra-precision convexity measurement; first, rotate the X-axis lead screw 53 by the handwheel or knob 54 in the X-axis measuring unit 5 to move the X-axis displacement slide along a pair of X-axis guide rails 51. After it is in position, the X-axis position information of the electronic micrometer 74 is transmitted to the digital display module 8 by the X-axis grating ruler 55; then, rotate the X-axis lead screw 63 by the handwheel or knob 64 in the Y-axis measuring unit 6 to move the Y-axis displacement slide 60 along a pair of Y-axis guide rails 61. After it is in position, the Y-axis position information of the electronic micrometer 74 is transmitted to the digital display module 8 by the Y-axis grating ruler 65; then, precisely adjust the Z-axis position of the micrometer base 72 on the Z-axis adjusting screw 71 by adjusting the two fine-tuning nuts 73 in the Z-axis measuring unit 7, and then measure the Z-axis coordinate value of each measuring point by the electronic micrometer 74 and transmit it to the digital display module 8;

[0054] 4) By comparing with previous empirical parameters, the deviation of the Z-axis value and the corresponding center distance A of the main and auxiliary guide rollers can be confirmed;

[0055] 5) Adjust the center distance A between the main guide roller 1A and the auxiliary guide roller 1B, that is, adjust the contact angle β between the small end of the roller 10 and the main guide roller 1A and the auxiliary guide roller 1B, and measure the Z-direction value of the roller 10 again until it is consistent with the empirical parameters.

[0056] 6) Select the foremost roller 10 located between the main guide roller 1A and the auxiliary guide roller 1B and the last roller 10 located between the main guide roller 1A and the auxiliary guide roller 1B for measurement to determine whether the parallelism of the main guide roller 1A and the auxiliary guide roller 1B meets the requirements.

[0057] The measuring device of this invention allows for high-precision re-measurement of the three-dimensional orientation of the roller 10 after the main guide roller 1A and auxiliary guide roller 1B of the ultra-precision grinding machine are installed. Using the positioning orientation of the roller 10 as the result guide ensures that the outer convexity shape of the roller 10 meets the technical requirements in one go after adjustment. Simultaneously, this measuring device enables simultaneous adjustment and measurement during the positioning adjustment process of the main guide roller 1A and auxiliary guide roller 1B, greatly improving the positioning adjustment efficiency of the main guide roller 1A and auxiliary guide roller 1B.

[0058] Since the high-precision grating ruler, ball screw, and linear guide rail in the measuring device of this invention should operate in a dust-free, enclosed environment, the relevant mechanisms should have protective measures such as linked protective covers, which are not specifically described in this invention. Furthermore, the X-axis and Y-axis lead screw mechanisms can also be modified to be servo-controlled, and automated measurement can be achieved by developing relevant dedicated computer testing software.

[0059] The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the scope of the invention and should be defined by the claims.

Claims

1. A bearing convexity taper roller superfinishing positioning attitude measuring device, comprising a measuring table, a pair of fixed bases, a pair of adjustable bases, an X-direction measuring unit, a Y-direction measuring unit, a Z-direction measuring unit and a digital display module; characterized in that the measuring table is in a rectangular frame structure and comprises two X-direction slats and two Y-direction slats; the top of the pair of fixed bases is mounted on the bottom surface of one Y-direction slat of the measuring table, and the lower end of the pair of fixed bases is correspondingly arranged on the one-end bearing seat of the main guide roller and the one-end bearing seat of the auxiliary guide roller of a superfinishing grinder; the top of the pair of adjustable bases is mounted on the bottom surface of the other Y-direction slat of the measuring table, and the lower end of the pair of adjustable bases is correspondingly arranged on the other-end bearing seat of the main guide roller and the other-end bearing seat of the auxiliary guide roller of the superfinishing grinder; the lower part of the pair of fixed bases and the lower part of the pair of adjustable bases are in a 90° V-shaped structure with the outer circle matching surface of the bearing seat; the X-direction measuring unit comprises a pair of X-direction guide rails, an X-direction displacement drag plate, an X-direction screw mechanism and an X-direction grating ruler; wherein the pair of X-direction guide rails are correspondingly fixed on the top surfaces of the two X-direction slats of the measuring table along the length direction of the measuring table; the X-direction displacement drag plate comprises a horizontal plate and a vertical plate fixed on the bottom of the horizontal plate, two X-direction sliders corresponding to the pair of X-direction guide rails are fixed on the bottom surface of the horizontal plate, so that the X-direction displacement drag plate is movably mounted on the pair of X-direction guide rails through the pair of X-direction sliders; the X-direction screw mechanism comprises an X-direction screw rod installed on the top surface of the measuring table in parallel with the pair of X-direction guide rails and close to one X-direction guide rail, an X-direction screw nut fixed on the bottom surface of the X-direction displacement drag plate and a hand wheel or knob installed on one end of the X-direction screw rod; the X-direction grating ruler is installed on the top surface of the measuring table in parallel with the pair of X-direction guide rails and close to the other X-direction guide rail; the Y-direction measuring unit comprises a pair of Y-direction guide rails, a Y-direction displacement drag plate, a Y-direction screw mechanism and a Y-direction grating ruler; wherein the pair of Y-direction guide rails are fixed on the front surface of the vertical plate of the X-direction displacement drag plate one above the other; the upper part and the lower part of the rear surface of the Y-direction displacement drag plate are each fixed with a Y-direction slider corresponding to the pair of Y-direction guide rails, so that the Y-direction displacement drag plate is movably mounted on the pair of Y-direction guide rails through the pair of Y-direction sliders; the Y-direction screw mechanism comprises a Y-direction screw rod fixed on the front surface of the vertical plate of the X-direction displacement drag plate in parallel with the pair of Y-direction guide rails and located in the middle of the pair of Y-direction guide rails, a Y-direction screw nut fixed on the middle of the rear surface of the Y-direction displacement drag plate and a hand wheel or knob installed on one end of the Y-direction screw rod; and the Y-direction grating ruler is installed on the lower part of the front surface of the vertical plate of the X-direction displacement drag plate in parallel with the pair of Y-direction guide rails. ​ ​ ​ ​ ​ ​ The Z-direction measuring unit comprises a Z-direction base, a Z-direction adjusting screw, a micrometer seat 72 and an electronic micrometer 74; wherein the Z-direction base is fixed on the front surface of the Y-direction displacement carriage; the Z-direction adjusting screw is fixed on the bottom surface of the Z-direction base; one end of the micrometer seat is installed on the Z-direction adjusting screw through two fine adjustment nuts; the dial head of the electronic micrometer is installed on the other end of the micrometer seat through a set screw; The digital display module is arranged beside the measuring table and is connected with the X-direction grating ruler, the Y-direction grating ruler and the electronic micrometer through signal lines.

2. The apparatus for measuring the super-precision positioning attitude of a bearing convexity tapered roller according to claim 1, characterized in that, The bottom surface of each of the two Y-direction slats of the measuring table is provided with a bottom mounting groove in the length direction of the Y-direction slat, the bottom mounting groove is through the length direction of the Y-direction slat, and a top mounting groove is provided in the middle of the bottom surface of the bottom mounting groove in the length direction of the Y-direction slat and opens to the top surface of the Y-direction slat; The fixed base comprises a long column and a reverse V-shaped clamping seat integrally connected to the lower end of the long column, the top surface of the long column is provided with an upper flange matched with the bottom mounting groove on the Y-direction slat of the measuring table, and a threaded blind hole is formed in the center of the top surface of the upper flange; after each of the pair of fixed bases is embedded in the bottom mounting groove on one Y-direction slat of the measuring table through the upper flange on the top surface of the long column, the pair of fixed bases are fixed to the bottom of the measuring table through two top bolts arranged in the top mounting groove. The adjustable base comprises a base locking block, a short column and a reverse V-shaped clamping seat integrally connected to the lower end of the short column; the top surface of the base locking block is provided with an upper flange matched with the bottom mounting groove on the Y-direction slat of the measuring table, and a threaded blind hole is formed in the center of the top surface of the upper flange; the bottom surface of the base locking block is provided with a reverse T-shaped lower flange, and an upper semicircular threaded through groove is horizontally formed in the middle of the bottom surface of the lower flange; a connecting groove matched with the lower flange on the bottom surface of the base locking block is formed in the top surface of the short column, and a lower semicircular threaded through groove matched with the upper semicircular threaded through groove on the base locking block is horizontally formed in the bottom surface of the connecting groove. After the upper flanges of the base locking blocks of the pair of adjustable bases are embedded in the bottom mounting grooves on the other Y-direction slat of the measuring table, the two base locking blocks are fixed to the bottom of the measuring table through two top bolts arranged in the top mounting groove, and the lower flanges of the two base locking blocks are embedded in the connecting grooves of the two short columns one by one, and then the locking bolts are connected in the threaded through holes formed by the upper semicircular threaded through groove and the lower semicircular threaded through groove.

3. The apparatus for measuring the super-precision positioning attitude of a bearing convexity tapered roller according to claim 2, characterized in that, The outer part of the lower end surface of the reverse V-shaped clamping seat is provided with a limiting step.

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