A device and method for adjusting guide rollers of a centerless through-type superfinishing machine

Abstract

A guide roller adjustment device for a centerless through-type superfinishing machine includes a transmission component, a position sensing and display component, and a calibration component; the displacement sensor in the position sensing and display component detects the position of the sensor pressure plate and outputs it to the display module for display; the calibration component consists of a calibration rod kit, a calibration plate, and an oilstone clamp; the calibration plate is clamped in the oilstone clamp to represent the position of the oilstone; the calibration rod kit consists of a calibration rod, a support disc, and a standard diameter disc; the position data of the front and rear guide rollers are calibrated by the standard diameter disc and the calibration plate. According to the adjustment requirements of the front and rear positions of the workpiece relative to the oilstone and the adjustment requirements of the center distance of the front and rear guide rollers, the guide roller position data is calculated as the design value based on the calibrated reference position; the front and rear guide rollers are adjusted, and when the data displayed on the display module matches the design value, it is considered to be adjusted in place. The device has the advantages of high adjustment accuracy, good consistency, and quick and convenient adjustment.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing and manufacturing, and in particular to a guide roller adjustment device and method for a centerless through-type superfinishing machine. Background Art

[0002] At present, the centerless through-type superfinishing machine is a high-efficiency superfinishing machine tool. Its working method is that a pair of guide rollers arranged front and back for fixed axis rotation support the workpiece, and drive the workpiece to rotate while penetrating from right to left or from left to right; a row of oilstones arranged along the penetration direction of the workpiece presses on the workpiece from above with a certain pressure in a floating manner, and drives the oscillation device to make a high-frequency small-amplitude linear reciprocating motion to superfinish the workpiece that passes through it continuously below. The centerless through-type superfinishing machine used for superfinishing of tapered and cylindrical rollers is often regarded as a special machine tool, referred to as a tapered roller superfinishing machine and a cylindrical roller superfinishing machine respectively. The centerless through-type superfinishing machine used for superfinishing the surface of other cylindrical workpieces is often regarded as a general-purpose machine tool, referred to as a centerless superfinishing machine. When the centerless through-type superfinishing machine is working, the front and rear position relationship of the workpiece relative to the oilstone and the contact angle between the workpiece and the guide roller are important factors affecting the superfinishing effect. They are all determined by the front and rear positions of the two guide rollers relative to the oilstone. Therefore, the precise adjustment of the front and rear positions of the guide rollers is of great significance for superfinishing. For cylindrical roller superfinishing machines and centerless superfinishing machines, the guide roller axis has an inclination angle relative to the horizontal plane, and the front and rear guide rollers are in opposite inclination directions. In this regard, the roller penetration direction in the horizontal plane is inconsistent with the guide roller axis direction, and there is an angle between the two. Therefore, the adjustment of the front and rear positions of the guide rollers also needs to meet the requirements of this angle to ensure that the rollers penetrate along the arrangement direction of the oilstone. Generally speaking, the goals to be achieved by adjusting the front and rear positions of the guide rollers include two aspects: one is to meet the requirements of the center distance between the front and rear guide rollers to ensure the correct contact angle between the workpiece and the guide roller; the other is to meet the tool alignment requirements between the workpiece and the oilstone (tool), that is, the front and rear position requirements of the workpiece relative to the oilstone. When the centerless through-type superfinishing machine is used, the front and rear positions of the guide rollers need to be adjusted after the workpiece model is changed or the guide rollers are ground. The adjustment of the front and rear position of the guide roller is an important part of the use of the centerless through-type superfinishing machine, and it is also a frequently occurring machine tool operation behavior. The adjustment of the guide roller of the centerless through-type superfinishing machine is mainly the adjustment of the front and rear position. Therefore, in order to avoid misunderstanding, the front and rear position adjustment of the guide roller is often referred to as the guide roller adjustment. The so-called guide roller adjustment device is generally also the guide roller front and rear position adjustment device.

[0003] The structures related to guide roller adjustment of the centerless through-type superfinishing machine have the following characteristics: the guide roller is long, and the span of the bearing seats on both ends often exceeds 1000mm, while the adjustment amount of the front and rear position of the guide roller is relatively small, usually within 50mm; the guide roller is generally installed on the front and rear guide roller support plates with bearing seats through the support bearings at both ends, and the support plates are placed on the machine tool bed; the front and rear position of the guide roller relative to the oilstone is adjusted by adjusting the front and rear position of the support plate on the machine tool bed. After adjustment, the guide roller support plate is locked on the machine tool bed.

[0004] When adjusting the front and rear positions of guide rollers in existing centerless through-type superfinishing machines, the operator observes with the naked eye whether the front and rear positions of the workpiece relative to the oilstone are appropriate, and measures the center distance of the front and rear guide rollers with a vernier caliper or feeler gauge to determine whether the guide rollers are adjusted in place. Since the contact surface between the oilstone and the workpiece is an arc surface, it is difficult to accurately determine whether the front and rear positions of the two are appropriate by the naked eye of the operator, and the naked eye observation and adjustment operations cannot be performed at the same time. Therefore, this adjustment method has low accuracy, poor consistency, and is inconvenient to operate. In addition, the measurement of the center distance of the front and rear guide rollers in this method is carried out using measuring tools such as vernier calipers or feeler gauges, which is also inconvenient. With the continuous improvement of superfinishing requirements, the guide roller adjustment accuracy and operational convenience of existing devices and methods can no longer meet the requirements of modern high-precision parts superfinishing. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide a centerless through-type superfinishing machine guide roller adjustment device and method, which has the advantages of high adjustment accuracy, good consistency, and quick and convenient adjustment.

[0006] The technical solution adopted by the present invention is: a guide roller adjustment device for a centerless through-type superfinishing machine, comprising a transmission component for driving the front and rear guide rollers to move so as to adjust the positions of the front and rear guide rollers relative to the oilstone, a position sensor and display component for displaying the current position data of the front and rear guide rollers, and a calibration component for calibrating the front and rear position data of the guide rollers;

[0007] The transmission assembly includes a front guide roller support plate with a bearing seat, a rear guide roller support plate with a bearing seat, and a transmission mechanism for driving the front guide roller support plate and the rear guide roller support plate to move, and the front guide roller and the rear guide roller are respectively arranged in the bearing seats of the front guide roller support plate and the rear guide roller support plate;

[0008] The position sensing and display assembly includes a sensor platen, a displacement sensor and a display module. The sensor platens are provided in plurality and are respectively fixedly arranged on the left and right sides of the front guide roller support plate and the rear guide roller support plate. Each sensor platen is provided with a displacement sensor for sensing the position of the sensor platen. The signal output by the displacement sensor is transmitted to the display module for processing and displayed as guide roller position data.

[0009] The calibration assembly consists of a calibration rod kit, a calibration plate, and an oilstone clamp for clamping the calibration plate. The calibration plate is clamped in the oilstone clamp to represent the front and rear positions of the oilstone. The calibration rod kit consists of a calibration rod and a support disc and a standard diameter disc installed on the calibration rod. The calibration rod can be set in the bearing seats of the front guide roller support plate and the rear guide roller support plate through the support discs on both sides, and the position data of the front and rear guide rollers are calibrated through the standard diameter disc and the calibration plate.

[0010] Further optimization, the displacement sensor is a differential transformer displacement sensor.

[0011] Further optimization is performed, wherein four sensor pressure plates are provided, and the four sensor pressure plates are respectively fixedly arranged on the left and right sides of the front guide roller support plate and the rear guide roller support plate, and four displacement sensors are respectively arranged on the machine tool bed to sense the displacement of the four sensor pressure plates.

[0012] Further optimization, the calibration component, wherein two calibration plates are provided, the two calibration plates are positioned based on the front and rear position references of the oilstones installed on the left and right sides, wherein two standard diameter discs are provided on the calibration rod, and each standard diameter disc is respectively set corresponding to one of the calibration plates.

[0013] Further optimized, the transmission mechanism includes a left screw nut pair for driving the front guide roller support plate and the rear guide roller support plate to move on the left side, and a right screw nut pair for driving the front guide roller support plate and the rear guide roller support plate to move on the right side.

[0014] Further optimization, the left screw nut pair is provided with a screw with three sections of thread, and a nut is provided on the screw corresponding to each section of thread, one of the nuts is fixedly set on the machine tool bed to realize the overall movement of the left side of the front and rear guide rollers, and the other two nuts are placed in the left guide groove on the bed to guide the movement of the nuts while preventing the nuts from rotating, and are respectively connected to the front guide roller support plate and the rear guide roller support plate through a small gap positioning fit of a cylindrical pin and a cylindrical hole, and the thread rotation direction of the screw nut pair connected to the front guide roller support plate and the rear guide roller support plate is opposite to realize the opening or closing movement of the left side of the front and rear guide rollers.

[0015] Further optimization, the right screw nut pair is provided with a screw with three sections of thread, and a nut is provided on the screw corresponding to each section of thread, one of the nuts is fixedly set on the machine tool bed to realize the overall movement of the right side of the front and rear guide rollers, and the other two nuts are placed in the right guide groove on the bed to guide the movement of the nut while preventing the nut from rotating, and are respectively connected to the front guide roller support plate and the rear guide roller support plate through a small gap sliding fit of a cylindrical pin and a long slot hole to ensure that there is no motion interference when the left and right sides of the guide roller support plate move respectively; the thread rotation direction of the screw nut pair connected to the front guide roller support plate and the rear guide roller support plate is opposite to that of the front guide roller support plate to realize the opening or closing movement of the right side of the front and rear guide rollers.

[0016] A method for adjusting a guide roller adjustment device of a centerless through-type superfinishing machine, comprising:

[0017] Calibrate the position data of the front and rear guide rollers: place the support discs at both ends of the calibration rod kit in the bearing seats of the front guide roller support plate and the rear guide roller support plate in turn to ensure that the axis of the standard diameter disc coincides with the axis of the guide roller; clamp the two calibration plates in the oilstone clamps on the left and right sides respectively to ensure that the installation reference of their front and rear positions coincides with the installation reference of the oilstone; adjust the front and rear positions of the front guide roller support plate and the rear guide roller support plate in turn, and use a feeler gauge to detect the gap between the two standard diameter discs and the corresponding calibration plates. When the gap size is equal to the feeler gauge size, calibrate the position data of the left and right sides of the guide roller to zero and set it in the display module;

[0018] Adjust the front and rear positions of the guide rollers: According to the requirements for adjusting the front and rear positions of the workpiece relative to the oilstone and the requirements for adjusting the center distance of the front and rear guide rollers, calculate the guide roller position data that needs to be adjusted as the design value based on the above-calibrated reference position; adjust the front and rear positions of the left and right sides of the front and rear guide rollers through the corresponding transmission components respectively. When the guide roller position data displayed on the display module is consistent with the design value, the front and rear positions of the guide rollers are considered to be adjusted in place.

[0019] The beneficial effects of the present invention are high adjustment accuracy, good consistency and convenient operation, and the specific analysis is as follows:

[0020] First, the technical solution of the present invention overcomes the adverse effects of human factors in the existing solutions, and can improve the guide roller adjustment accuracy and consistency. When the existing centerless through-type superfinishing machine adjusts the front and rear positions of the guide rollers, the operator observes the arc contact between the workpiece and the oilstone with the naked eye to determine whether the guide rollers are adjusted in place; this solution determines whether the guide rollers are adjusted in place based on the guide roller position data displayed on the screen, thus overcoming the adverse effects of human factors in the existing solutions.

[0021] Second, in the present invention, the precise measurement and digital display of the front and rear position data of the guide roller can ensure the adjustment accuracy and consistency of the front and rear position of the guide roller. The accuracy of the front and rear position adjustment of the guide roller is mainly determined by the accuracy of the front and rear position of the workpiece relative to the oilstone after adjustment and the accuracy of the center distance of the front and rear guide rollers. The front and rear position data of the guide roller measured and displayed by the present invention can accurately reflect the front and rear position of the workpiece relative to the oilstone, and can also accurately reflect the center distance of the front and rear guide rollers. First, when the present invention calibrates the front and rear position data of the guide roller, the position of the calibration plate represents the position of the oilstone, the axis of the calibration rod represents the axis of the guide roller, the standard diameter disk on the calibration rod, the thickness of the calibration plate and the feeler gauge all have precise dimensions, and the guide roller displacement measured by the displacement sensor is also very precise. Therefore, after calibration, the guide roller position data obtained when adjusting the guide roller is the precise position data of the guide roller relative to the oilstone. Since the front and rear position of the workpiece depends entirely on the front and rear positions of the two guide rollers, these data can accurately reflect the front and rear position of the workpiece relative to the oilstone. Secondly, the guide roller position data of the present invention has four data, which are the position data of the left and right sides of the front and rear guide rollers. Therefore, these data can accurately reflect the center distance of the left and right sides of the front and rear guide rollers in the horizontal plane and the angle between the guide roller axis and the arrangement direction of the oilstone. The data based on the displacement sensor has good consistency, so the consistency of the front and rear position adjustment accuracy of the guide roller is good.

[0022] Third, the present invention has screw nut pairs with unique structural characteristics on the left and right sides, and has a unique connection method between the nuts and the guide roller support plates, specifically: the two nuts in the left screw nut pair are respectively connected to the front guide roller support plate and the rear guide roller support plate through a small gap positioning fit between a cylindrical pin and a cylindrical hole, and the two nuts in the right screw nut pair are respectively connected to the front guide roller support plate and the rear guide roller support plate through a small gap sliding fit between a cylindrical pin and a long slot hole, so as to ensure that there is no motion interference when the left and right sides of the guide roller support plates move respectively, so that the positions of the front and rear guide rollers on the left and right sides can be adjusted respectively, and then matched with the setting of the four displacement sensors, so as to meet the adjustment requirements of the front and rear positions of the left and right workpieces relative to the oilstone in the horizontal plane, the center distance between the left and right sides of the front and rear guide rollers, and the angle between the guide roller axis and the arrangement direction of the oilstone.

[0023] Fourth, in the existing adjustment method, the operator needs to repeatedly measure the center distance of the front and rear guide rollers with a vernier caliper or a feeler gauge, and repeatedly press the oilstone against the workpiece to observe the arc contact surface between the oilstone and the workpiece with the naked eye, which is very cumbersome and time-consuming. In contrast, when adjusting the front and rear positions of the guide rollers of the present invention, the operator only needs to alternately turn the left and right lead screw nut pairs and observe the guide roller position data on the display screen. When the displayed position data reaches the specified numerical requirements, the adjustment can be ended, which is quick and convenient. The calibration of the front and rear position data of the guide rollers does not need to be performed frequently. It is generally performed once before the machine tool performs the first guide roller adjustment and is reviewed when necessary. Therefore, the calibration does not affect the convenience of using the device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the device of the present invention;

[0025] Figure 2 A schematic diagram of the installation of the calibration component when calibrating the position of the front guide roller;

[0026] Figure 3 Schematic diagram of the calibration component installation when calibrating the position of the rear guide roller;

[0027] Figure 4 It is a structural schematic diagram of the calibration rod kit in the present invention;

[0028] Figure 5 This is the position relationship diagram of the front and rear guide rollers, the workpiece and the oilstone when they are adjusted into place;

[0029] Figure 6 This is a position relationship diagram between the components of the calibration assembly when the front and rear guide roller position data are calibrated to zero.

[0030] Figure markings: 101, sensor pressure plate, 102, displacement sensor, 103, display module, 201, calibration rod kit, 2011, calibration rod, 2012, standard diameter disc, 2013, support disc, 202, calibration plate, 203, oilstone clamp, 301, left screw nut pair, 302, right screw nut pair, 303, front guide roller support plate, 304, rear guide roller support plate, 305, front guide roller, 306, rear guide roller, 4, oilstone, 5, workpiece, 6, machine tool bed. DETAILED DESCRIPTION

[0031] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0032] It should be noted that, unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express quantitative limitations, but indicate the existence of at least one. Words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, but do not exclude other elements or objects.

[0033] The detailed structure of this scheme is described in detail below in conjunction with the accompanying drawings: Figure 1-6As shown, a guide roller adjustment device for a centerless through-type superfinishing machine includes a transmission component for driving the front and rear guide rollers to move so as to adjust the positions of the front and rear guide rollers relative to the oilstone, a position sensor and display component for displaying the current position data of the front and rear guide rollers, and a calibration component for calibrating the front and rear position data of the guide rollers;

[0034] The transmission assembly includes a front guide roller support plate 303 with a bearing seat, a rear guide roller support plate 304 with a bearing seat, and a transmission mechanism for driving the front guide roller support plate and the rear guide roller support plate to move. The front guide roller 305 and the rear guide roller 306 are respectively arranged in the bearing seats of the front guide roller support plate 303 and the rear guide roller support plate 304;

[0035] The position sensing and display assembly includes a sensor platen 101, a displacement sensor 102 and a display module 103. The sensor platens 101 are provided in plurality and are respectively fixedly arranged on the left and right sides of the front guide roller support plate 303 and the rear guide roller support plate 304. Each sensor platen 101 is provided with a displacement sensor 102 for sensing the position of the sensor platen. The signal output by the displacement sensor 102 is transmitted to the display module 103 for processing and display as guide roller position data.

[0036] The calibration assembly consists of a calibration rod kit 201, a calibration plate 202, and an oilstone clamp 203 for clamping the calibration plate. The calibration plate 202 is clamped in the oilstone clamp 203 to represent the front and rear positions of the oilstone 4. The calibration rod kit 201 consists of a calibration rod 2011 and a support disc 2012 and a standard diameter disc 2013 installed on the calibration rod 2011. The calibration rod 2011 can be set in the bearing seats of the front guide roller support plate 303 and the rear guide roller support plate 304 through the support discs 2012 on the left and right sides. The position data of the front and rear guide rollers are calibrated through the standard diameter disc 2013 and the calibration plate 202.

[0037] In this solution, the displacement sensor 102 is preferably a differential transformer displacement sensor.

[0038] It should be noted that in order to improve the detection effect, the following installation method can be adopted: there are four sensor pressure plates 101, and the four sensor pressure plates 101 are respectively fixed on the left and right sides of the front guide roller support plate 303 and the rear guide roller support plate 304, and the four displacement sensors 102 are respectively arranged at the four corners of the machine tool bed in a one-to-one correspondence with the four sensor pressure plates 101 to sense the displacement of the four sensor pressure plates.

[0039] In the present embodiment, the calibration assembly comprises two calibration plates 202, wherein the two calibration plates 202 are positioned based on the front and rear positions of the oilstones 4 installed on both sides, wherein the calibration rod 2011 is provided with two standard diameter discs 2013, and each standard diameter disc 2013 is respectively arranged corresponding to one of the calibration plates 202.

[0040] At the same time, this scheme optimizes the design of the transmission component, specifically: the transmission mechanism includes a left screw nut pair 301 for driving the front guide roller support plate 303 and the rear guide roller support plate 304 to move on the left side, and a right screw nut pair 302 for driving the front guide roller support plate and the rear guide roller support plate to move on the right side; the specific structure is as follows: the left screw nut pair 301 is provided with a screw with three sections of thread, and a nut is provided on the screw corresponding to each section of thread, one of the nuts is fixedly set on the machine tool bed to realize the overall movement of the left side of the front and rear guide rollers, and the other two nuts are placed in the left guide groove on the bed to guide the movement of the nut while preventing the nut from rotating, and are respectively connected to the front guide roller support plate and the rear guide roller support plate through the small gap positioning fit of the cylindrical pin and the cylindrical hole, and are connected to the front guide roller support plate The thread rotation direction of the screw nut pair connecting the plate and the rear guide roller support plate is opposite to that of the left side of the front and rear guide rollers; the right screw nut pair 302 is provided with a screw with three sections of thread, and a nut is provided on the screw corresponding to each section of thread, one of the nuts is fixed on the machine tool bed to realize the overall movement of the right side of the front and rear guide rollers, and the other two nuts are placed in the right guide groove on the bed to guide the movement of the nut while preventing the nut from rotating, and are respectively connected to the front guide roller support plate and the rear guide roller support plate through a small gap sliding fit of a cylindrical pin and a long slot hole to ensure that there is no motion interference when the left and right sides of the guide roller support plate move respectively, and the thread rotation direction of the screw nut pair connected to the front guide roller support plate and the rear guide roller support plate is opposite to that of the right side of the front and rear guide rollers.

[0041] A method for adjusting a guide roller adjustment device of a centerless through-type superfinishing machine, specifically comprising:

[0042] Calibrate the position data of the front and rear guide rollers: place the support discs 2013 at both ends of the calibration rod kit 201 in the bearing seats of the front guide roller support plate 303 and the rear guide roller support plate 304 in turn to ensure that the axis of the standard diameter disc 2012 coincides with the axis of the guide roller; clamp the two calibration plates 202 in the oilstone clamps 203 on the left and right sides respectively to ensure that the installation datum of their front and rear positions coincides with the installation datum of the oilstone; adjust the front and rear positions of the front guide roller support plate 303 and the rear guide roller support plate 304 in turn, and use a feeler gauge to detect the gap between the two standard diameter discs 2012 and the corresponding calibration plates 202. When the gap size is equal to the feeler gauge size, calibrate the position data of the left and right sides of the guide roller to zero and set it in the display module; the calculation of the design value of the guide roller position data is based on the calibration. Calibration does not need to be performed frequently. Generally, it is only necessary to perform calibration once before the first guide roller adjustment of the machine tool and to review it when necessary.

[0043] Adjust the front and rear positions of the guide rollers: According to the adjustment requirements of the front and rear positions of the workpiece 5 to be processed relative to the oilstone and the adjustment requirements of the center distance of the front and rear guide rollers, the guide roller position data to be adjusted is calculated as the design value based on the above-mentioned calibrated reference position; the front and rear positions of the left and right sides of the front and rear guide rollers are adjusted respectively through the corresponding transmission components. When the guide roller position data displayed by the display module 103 is consistent with the design value, the front and rear positions of the guide rollers are regarded as being adjusted in place.

[0044] It should be noted that in the existing adjustment method, the operator needs to repeatedly measure the center distance of the front and rear guide rollers with a vernier caliper or a feeler gauge, and repeatedly press the oilstone against the workpiece to observe with the naked eye whether the oilstone and the workpiece are aligned, which is very cumbersome and time-consuming. In contrast, when adjusting the front and rear positions of the guide rollers of the present invention, the operator only needs to alternately turn the left and right screw nut pairs, and observe the guide roller position data on the display screen. When the displayed position data reaches the specified numerical requirements, the adjustment can be ended, which is quick and convenient. The calibration of the front and rear position data of the guide rollers does not need to be performed frequently. It is generally performed once before the machine tool performs the first guide roller adjustment and is reviewed when necessary. Therefore, the calibration does not affect the convenience of using the device of the present invention.

[0045] The technical principles of the present invention are as follows:

[0046] The technical principle of high adjustment accuracy and good consistency of the front and rear positions of the guide rollers: Specifically, the accuracy of the front and rear position adjustment of the guide rollers is mainly determined by the accuracy of the front and rear position of the workpiece relative to the oilstone after adjustment and the accuracy of the center distance of the front and rear guide rollers. When the existing centerless through-type superfinishing machine adjusts the front and rear positions of the guide rollers, the operator directly observes whether the front and rear position of the workpiece relative to the oilstone is appropriate, and combines the vernier caliper or feeler gauge measurement of the center distance of the front and rear guide rollers to determine whether the guide rollers are adjusted in place. Since the contact surface between the oilstone and the workpiece is an arc surface, it is difficult to accurately judge whether the front and rear positions of the two are appropriate by the operator's naked eye observation. Therefore, the adjustment accuracy is low and the consistency is poor. On the one hand, the present invention uses a displacement sensor and display component and a special calibration component to accurately measure the front and rear position data of both sides of the front and rear guide rollers relative to the oil stone, and displays it on the screen through displacement signal processing and digital display module; on the other hand, according to the front and rear position of the workpiece relative to the oil stone and the adjustment requirements of the center distance of the front and rear guide rollers, according to the known parameter values ​​such as the diameter of the standard diameter disk 2012 in the special calibration rod kit 201, the thickness of the calibration plate 202, the thickness of the oil stone 4, and the thickness of the feeler gauge, the guide roller position design value is calculated and determined; in this way, when adjusting the guide roller, as long as the guide roller position data displayed on the screen reaches the design value, the front and rear position of the workpiece relative to the oil stone and the center distance of the front and rear guide rollers can be accurately guaranteed. Since the influence of human factors such as the naked eye observation and judgment of whether the arc contact surface position of the oil stone and the workpiece is correct is avoided, the front and rear position adjustment of the guide roller of the present invention is not only high in precision, but also good in consistency.

[0047] The guide roller position data measured and displayed by the device of the present invention is scientific and reasonable. First, the guide roller front and rear position data are the position data of the guide roller relative to the oilstone, and the front and rear position of the workpiece is completely dependent on the front and rear positions of the two guide rollers. Therefore, these data can accurately reflect the front and rear position of the workpiece relative to the oilstone. When calibrating the guide roller front and rear position data, the position of the calibration plate represents the position of the oilstone, the axis of the calibration rod represents the axis of the guide roller, the standard diameter disk on the calibration rod, the thickness of the calibration plate and the feeler gauge all have precise dimensions, and the guide roller displacement measured by the displacement sensor is also very precise. Therefore, after calibration, the guide roller position data obtained when adjusting the guide roller is the precise position data of the guide roller relative to the oilstone. Secondly, the guide roller position data of the present invention has 4, which are the position data of the left and right sides of the front and rear guide rollers. Therefore, the center distance between the left and right sides of the front and rear guide rollers in the horizontal plane and the angle between the guide roller axis and the arrangement direction of the oilstone can be accurately determined based on these data. Thirdly, in the position adjustment drive assembly of the present invention, a screw nut pair with unique structural characteristics is set on the left and right sides, and a unique connection method between the nut and the guide roller support plate is set, so that the positions of the left and right sides of the front and rear guide rollers can be adjusted respectively. This, in conjunction with the setting of the four displacement sensors, can well meet the adjustment requirements of the center distance between the left and right sides of the front and rear guide rollers in the horizontal plane and the angle between the axis and the arrangement direction of the oilstone. Finally, the present invention can ensure the consistency of the accuracy of the front and rear position adjustment of the guide rollers based on the precise measurement and digital display of the front and rear position data of the guide rollers by the displacement sensor.

[0048] Take the adjustment of the guide roller of a tapered roller superfinishing machine as an example. In most cases, the requirements for adjusting the front and rear positions of the guide rollers of this superfinishing machine are: the thickness center of the left and right oilstones is aligned with the center of the workpiece, the center distance between the front and rear guide rollers is S, and the front and rear guide roller axes are parallel in the horizontal plane (that is, the center distance between the left and right sides of the front and rear guide rollers in the horizontal plane is equal). When adjusted in place, the position relationship between the front and rear guide rollers and the workpiece and oilstone is as follows: Figure 5 When the position data of the front and rear guide rollers are calibrated to zero, the position relationship between the components of the special calibration assembly is as follows: Figure 6 According to the adjustment requirement, the calculation method for determining the design values ​​of the left and right sides of the front and rear guide rollers of the present invention is as follows.

[0049] Assume that the diameter of the standard diameter disc 2012 in the special calibration rod set 201 is Db, the thickness of the calibration plate 202 is Hb, the thickness of the oilstone 4 is Hs, and the thickness of the feeler gauge is Hc. The design values ​​of the front and rear guide roller positions are represented by Sq and Sh, respectively. The distances between the centers of the front and rear guide rollers and the oilstone installation datum are represented by Sdq and Sdh, respectively. When the calibration rods are placed on the front guide roller bearing seat and the rear guide roller bearing seat, respectively, the distances between the center of the standard diameter disc and the calibration plate installation datum are represented by Sbq and Sbh, respectively. Note that the oilstone installation datum coincides with the calibration plate installation datum. Then according to Figure 5 and Figure 6The geometric relationship shown can be obtained by the following calculation formula:

[0050]

[0051]

[0052]

[0053]

[0054] Sq=Sdq-Sbq

[0055] Sh=Sdh-Sbh

[0056] From the above calculation formula, the calculation formula for the design values ​​of the front and rear guide roller positions Sq and Sh is:

[0057]

[0058]

[0059] When the guide roller adjustment of the tapered roller superfinishing machine requires that the center distances of the front and rear guide rollers are not equal on the left and right sides, the design values ​​of the guide roller positions on the left and right sides are not equal. It is not difficult for those skilled in the art to calculate the left and right sides separately by referring to the above method.

[0060] For cylindrical roller superfinishing machines and external cylindrical superfinishing machines, the axes of the front and rear guide rollers have inclination angles of equal magnitude and opposite directions relative to the horizontal plane, which results in a small angle between the axes of the guide rollers and the roller penetration direction in the horizontal plane. To ensure that the roller penetration direction is consistent with the oilstone arrangement direction, the axes of the guide rollers and the oilstone arrangement direction must have the same small angle. Therefore, the design values ​​of the guide roller positions on the left and right sides are not equal. The above method can also be used to calculate the left and right sides separately, which is not difficult for technical personnel in this field.

[0061] It should be noted that although the present invention is described by the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and deformations to the present invention, but these changes and deformations should all fall within the scope of protection of the appended claims of the present invention and their equivalents.

Claims

1. A guide roller adjustment device for a centerless through-type superfinishing machine, characterized in that: It includes a transmission component for driving the front and rear guide rollers to move so as to adjust the positions of the front and rear guide rollers relative to the oilstone, a position sensor and display component for displaying the current position data of the front and rear guide rollers, and a calibration component for calibrating the front and rear position data of the guide rollers; The transmission assembly includes a front guide roller support plate with a bearing seat, a rear guide roller support plate with a bearing seat, and a transmission mechanism for driving the front guide roller support plate and the rear guide roller support plate to move, and the front guide roller and the rear guide roller are respectively arranged in the bearing seats of the front guide roller support plate and the rear guide roller support plate; The position sensing and display assembly includes a sensor platen, a displacement sensor and a display module. The sensor platens are provided in plurality and are respectively fixedly arranged on the left and right sides of the front guide roller support plate and the rear guide roller support plate. Each sensor platen is provided with a displacement sensor for sensing the position of the sensor platen. The signal output by the displacement sensor is transmitted to the display module for processing and displayed as guide roller position data. The calibration component is composed of a calibration rod kit, a calibration plate and an oilstone clamp for clamping the calibration plate. The calibration plate is clamped in the oilstone clamp to represent the front and rear positions of the oilstone. The calibration rod kit is composed of a calibration rod and a support disc and a standard diameter disc installed on the calibration rod. The calibration rod can be set in the bearing seats of the front guide roller support plate and the rear guide roller support plate through the support discs on the left and right sides, and the position data of the front and rear guide rollers are calibrated through the standard diameter disc and the calibration plate; there are four sensor pressure plates, which are fixedly arranged on the left and right sides of the front guide roller support plate and the rear guide roller support plate, respectively, and four displacement sensors are correspondingly arranged on the machine tool bed to sense the displacement of the four sensor pressure plates; the calibration component, wherein there are two calibration plates, the two calibration plates are positioned based on the front and rear position references of the oilstones installed on the left and right sides, wherein two standard diameter discs are arranged on the calibration rod, and each standard diameter disc is respectively arranged corresponding to one of the calibration plates.

2. The guide roller adjustment device of a centerless through-type superfinishing machine according to claim 1 is characterized in that: The displacement sensor is a differential transformer type displacement sensor.

3. The guide roller adjustment device of a centerless through-type superfinishing machine according to claim 1 is characterized in that: The transmission mechanism comprises a left screw nut pair for driving the front guide roller support plate and the rear guide roller support plate to move on the left side, and a right screw nut pair for driving the front guide roller support plate and the rear guide roller support plate to move on the right side.

4. The guide roller adjustment device of a centerless through-type superfinishing machine according to claim 3 is characterized in that: The left screw nut pair is provided with a screw with three sections of threads, and a nut is provided on the screw corresponding to each section of the threads. One of the nuts is fixedly set on the machine tool bed to realize the overall movement of the left side of the front and rear guide rollers, and the other two nuts are placed in the left guide groove on the bed to guide the movement of the nuts while preventing the nuts from rotating. They are respectively positioned and matched with the front guide roller support plate and the rear guide roller support plate through the small gap of the cylindrical pin and the cylindrical hole. The thread rotation direction of the screw nut pair connected to the front guide roller support plate and the rear guide roller support plate is opposite to that of the screw nut pair to realize the opening or closing movement of the left side of the front and rear guide rollers.

5. The guide roller adjustment device of a centerless through-type superfinishing machine according to claim 3 is characterized in that: The right lead screw nut pair is provided with a lead screw with three sections of threads, and a nut is provided on the lead screw corresponding to each section of threads. One of the nuts is fixedly set on the machine tool bed to realize the overall movement of the right side of the front and rear guide rollers, and the other two nuts are placed in the right guide groove on the bed to guide the movement of the nut while preventing the nut from rotating. They are respectively connected to the front guide roller support plate and the rear guide roller support plate through a small gap sliding fit of a cylindrical pin and a long slot hole to ensure that there is no motion interference when the left and right sides of the guide roller support plate move respectively. The thread rotation direction of the lead screw nut pair connected to the front guide roller support plate and the rear guide roller support plate is opposite to that of the front guide roller support plate to realize the opening or closing movement of the right side of the front and rear guide rollers.

6. The method for adjusting the guide roller of the centerless through-type superfinishing machine according to any one of claims 1 to 5, characterized in that: Calibrate the position data of the front and rear guide rollers: place the support discs at both ends of the calibration rod kit in the bearing seats of the front guide roller support plate and the rear guide roller support plate in turn to ensure that the axis of the standard diameter disc coincides with the axis of the guide roller; clamp the two calibration plates in the oilstone clamps on the left and right sides respectively to ensure that the installation reference of their front and rear positions coincides with the installation reference of the oilstone; adjust the front and rear positions of the front guide roller support plate and the rear guide roller support plate in turn, and use a feeler gauge to detect the gap between the two standard diameter discs and the corresponding calibration plates. When the gap size is equal to the feeler gauge size, calibrate the position data of the left and right sides of the guide roller to zero and set it in the display module; Adjust the front and rear positions of the guide rollers: According to the requirements for adjusting the front and rear positions of the workpiece relative to the oilstone and the requirements for adjusting the center distance of the front and rear guide rollers, calculate the guide roller position data that needs to be adjusted as the design value based on the above-calibrated reference position; adjust the front and rear positions of the left and right sides of the front and rear guide rollers through the corresponding transmission components respectively. When the guide roller position data displayed on the display module is consistent with the design value, the front and rear positions of the guide rollers are considered to be adjusted in place.

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