CN111006624A - Elastic pressing type positioning and rotating mechanism for thin-wall bowl and using method thereof - Google Patents
Elastic pressing type positioning and rotating mechanism for thin-wall bowl and using method thereof Download PDFInfo
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- CN111006624A CN111006624A CN201811169807.2A CN201811169807A CN111006624A CN 111006624 A CN111006624 A CN 111006624A CN 201811169807 A CN201811169807 A CN 201811169807A CN 111006624 A CN111006624 A CN 111006624A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/047—Accessories, e.g. for positioning, for tool-setting, for measuring probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
Abstract
The invention discloses an elastic pressing type positioning and rotating mechanism for a thin-wall bowl and a using method thereof. The invention can realize the quick clamping and positioning of the thin-wall bowl-shaped part, and adopts a large-gap positioning method to avoid the radial deformation of the thin-wall bowl-shaped part in the measuring process; the flexible pressing mechanism is adopted, the pressing force is changed by adjusting the limiting position of the pressing sliding block and changing the diameter of a steel wire of the pressing spring, the axial deformation of a workpiece caused by the overlarge pressing force is avoided, meanwhile, the bearing is driven in the measuring process, the pressing force can be always applied in the measuring process, and therefore the measuring accuracy of the axial size of the workpiece is guaranteed; the integrated design of the rotary shaft system and the workpiece positioning table is realized, and the occurrence of matching errors between the transmission mechanism and the positioning mechanism is avoided; the system error caused by low rotation precision of the rotary shaft system can be effectively avoided, and the sampling point requirement of the thin-wall bowl-shaped part for rapid detection is met.
Description
Technical Field
The invention relates to the technical field of precision detection of mechanical products, in particular to an elastic pressing type positioning and rotating mechanism for a thin-wall bowl-shaped part and a using method thereof.
Background
The thin-wall bowl-shaped part is a machined product, has a plurality of axial and radial detection items, comprises important geometric dimensions such as diameter, roundness, thickness and the like and form and position tolerance, and the detection method of the three-coordinate measuring machine is a typical precision test method. Therefore, an on-line detection method meeting the background of batch manufacturing needs to be developed, and special detection equipment capable of realizing rapid and accurate measurement needs to be developed, and the equipment can realize simultaneous detection of a plurality of parameters of the thin-wall bowl-shaped part, so that the detection efficiency is improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an elastic compression type positioning and rotating mechanism for detecting important geometric dimension and form and position tolerance of a thin-wall bowl-shaped piece.
Another object of the invention is to provide a method of using a resilient press-on positioning and turning mechanism for detecting important geometrical and form and position tolerances of a thin-walled bowl.
Another object of the present invention is to provide a testing apparatus with an elastic pressing type positioning and rotating mechanism.
The invention is realized by the following technical scheme:
an elastic pressing type positioning and rotating mechanism for a thin-wall bowl-shaped part comprises a positioning pressing mechanism and a rotating mechanism;
the positioning and pressing mechanism comprises a positioning table and a pressing mechanism, wherein the positioning table is used for placing the thin-wall bowl-shaped part and is positioned below the pressing mechanism; the pressing mechanism comprises a guide rail, a pressing sliding block, a bearing frame, a bearing and a pressure spring, the pressing sliding block is parallel to the top surface of the positioning table, one side of the pressing sliding block is slidably connected with the guide rail and can be fixed at any position, the bearing frame is vertically arranged downwards, the top end of the bearing frame penetrates through the pressing sliding block and is in threaded connection with the pressing sliding block, the bearing is rotatably arranged at the bottom end of the bearing frame, and the pressure spring is sleeved on the bearing frame above the bearing;
the slewing mechanism comprises a main shaft fixedly connected to the bottom end of the positioning table and capable of rotating along the axial direction and a shaft sleeve sleeved outside the main shaft, and the shaft sleeve and the main shaft are coaxially arranged and form relative rotation with the main shaft.
In the above technical solution, the pressing mechanism further includes a hollow sliding sleeve, the sliding sleeve penetrates through the pressing sliding block and is vertically arranged downwards, the top end of the sliding sleeve is fixedly connected with the top surface of the pressing sliding block, a bearing frame coaxially arranged with the sliding sleeve is movably connected in the sliding sleeve, and the bearing frame can move in the sliding sleeve along the axial direction.
In the technical scheme, the slewing mechanism further comprises an upper thrust cover, a lower thrust cover and a nut, the upper thrust cover is fixedly connected with the top end of the spindle, the bottom surface of the upper thrust cover and the top surface of the spindle sleeve can rotate relatively, the lower thrust cover is sleeved outside the spindle, the top surface of the lower thrust cover and the bottom surface of the spindle sleeve can rotate relatively, and the nut is connected with the bottom end of the spindle through threads.
In the technical scheme, the bearing frame is provided with a through strip-shaped through hole, the length direction of the through strip-shaped through hole is consistent with the axial direction of the bearing frame, a pin is inserted into the through strip-shaped through hole, and the pin penetrates out of one side or two sides of the sliding sleeve.
In the above technical solution, the pressing slider slides in the horizontal direction or the vertical direction on the guide rail.
In the above technical solution, the sliding sleeve and the compressing slide block are integrally made or the sliding sleeve is connected with the compressing slide block through a screw.
In the above technical solution, the bearing is replaced by a roller or a ball whose surface material is a flexible material.
In the technical scheme, the number of the sliding sleeves is 1-8, and when the number of the sliding sleeves is 1, the sliding sleeves are arranged in the center of the bottom surface of the compression sliding block; when the number of the sliding sleeves is larger than 1, the sliding sleeves are uniformly distributed on the bottom surface of the pressing sliding block in a circumferential array.
In the technical scheme, the positioning table is of a barrel-shaped structure with a downward opening, the top end of the positioning table is processed into a boss, the outer diameter of the boss is matched according to the maximum inner hole diameter of the thin-wall bowl-shaped part, and the positioning table and the boss are in clearance fit; the barrel wall at the bottom end is provided with a groove with a horizontal bottom surface, and the groove is used for screwing in a screw to fixedly connect the positioning table with the upper push-up cover.
In the technical scheme, the two ends of the shaft sleeve are provided with the same annular convex edges, a ball frame is arranged between the main shaft and the shaft sleeve, the ball frame is the same as the shaft sleeve in shape, balls capable of freely rolling in the ball frame are embedded in the ball frame, and the balls are uniformly distributed between the upper thrust cover and the shaft sleeve, between the shaft sleeve and the lower thrust cover and between the shaft sleeve and the main shaft to realize shafting rotation of the main shaft.
In the above technical scheme, the balls between the shaft sleeve and the main shaft are arranged in a spiral line.
In the above technical scheme, the top end face of the main shaft is provided with axial threaded holes arranged in a circumferential array for screwing in screws to realize connection with the upper thrust cover.
In the above technical scheme, the upper thrust cover is provided with axial through holes arranged in a circumferential array near the center for connecting with the spindle, and the upper thrust cover is provided with axial threaded holes arranged in a circumferential array near the edge for connecting with the positioning table.
In the technical scheme, a disc spring is sleeved at the position, close to the bottom surface of the lower thrust cover, of the bottom of the spindle, and a recess matched with the disc spring is formed in the bottom surface of the lower thrust cover upwards.
In the above technical scheme, a washer is sleeved on a part of the main shaft, which is located between the nut and the disk spring.
On the other hand, the elastic pressing type positioning and rotating mechanism for the thin-wall bowl-shaped part is a main body structure of the thin-wall bowl-shaped part rapid special detection equipment, the mechanism is connected with a rack of the equipment through a shaft sleeve, and the main shaft is connected with a driving motor through a belt wheel so as to realize the rotation of the mechanism; the specific using process is as follows: the thin-wall bowl-shaped part is installed on the positioning table in a clearance fit mode by taking the central hole as a reference, the pressing sliding block is urged to slide along the guide rail, after the position is limited, the outer surface of the bottom end of the bearing contacts with a workpiece, the pressing spring is compressed, axial pressing force is provided for the thin-wall bowl-shaped part, the thin-wall bowl-shaped part is ensured to be completely attached to the positioning table, and therefore the positioning of the workpiece is completed; and starting a motor to drive the main shaft to rotate, driving the thin-wall bowl-shaped piece to synchronously rotate, and finishing measurement after the thin-wall bowl-shaped piece rotates for one circle by a sensor.
On the other hand, the detection equipment with the elastic compression type positioning and rotating mechanism comprises a rack, a driving mechanism, a measuring mechanism, the elastic compression type positioning and rotating mechanism, a control system and a measuring and analyzing system, wherein the elastic compression type positioning and rotating mechanism is fixed on the rack, the driving mechanism drives the elastic compression type positioning and rotating mechanism to rotate, the measuring mechanism is used for collecting coordinate signals of different positions on the thin-wall bowl-shaped member, and the measuring and analyzing system carries out calculation, display and data statistical analysis through signals collected by the measuring mechanism.
The invention has the advantages and beneficial effects that:
(1) the elastic pressing type positioning and rotating mechanism for the thin-wall bowl-shaped piece can realize quick clamping and positioning of the thin-wall bowl-shaped piece, and because the side wall of the thin-wall bowl-shaped piece is thin, and the roundness tolerance after machining is large, the elastic pressing type positioning and rotating mechanism for the thin-wall bowl-shaped piece adopts a large-gap positioning method in the radial direction, and avoids radial deformation of the thin-wall bowl-shaped piece in the measuring process, thereby ensuring the accuracy of measuring the inner diameter, the outer diameter and the roundness.
(2) The elastic pressing type positioning and rotating mechanism for the thin-wall bowl-shaped part adopts the flexible pressing mechanism, the pressing force can be changed by adjusting the limiting position of the pressing sliding block and changing the diameter of a steel wire of the pressure spring, the axial deformation of a workpiece caused by the overlarge pressing force is avoided, and meanwhile, as the pressing mechanism transmits the pressing force through the bearing at the tail end, the bearing follows up in the measuring process, the pressing force can be always applied in the measuring process, so that the measuring accuracy of the axial dimension of the workpiece is ensured.
(3) The rotation precision of the rotation mechanism reaches 0.003mm, and the precision error is within +/-0.001 mm under different rotation speeds, so that the system error of a transmission system is reduced to the maximum extent.
(4) The elastic pressing type positioning and rotating mechanism for the thin-wall bowl-shaped part realizes the integrated design of the rotating shaft system and the workpiece positioning table, and avoids the occurrence of matching errors between the transmission mechanism and the positioning mechanism.
(5) The elastic pressing type positioning and rotating mechanism for the thin-wall bowl-shaped piece, disclosed by the invention, also has the remarkable advantages of small friction moment, large load, high reliability and the like, can effectively avoid system errors caused by low rotation precision of a rotating shaft system, and meets the point acquisition requirement of rapid detection of the thin-wall bowl-shaped piece.
Drawings
Fig. 1 is a partial cross-sectional view of a resilient compact positioning and swivel mechanism for a thin-walled bowl of the present invention.
Fig. 2 is a partial schematic view of a resilient compact positioning and turning mechanism for a thin-walled bowl according to the present invention.
Fig. 3 is a perspective view of a flexible compact positioning and turning mechanism for a thin-walled bowl according to the present invention.
Wherein:
1: upper thrust cap, 2: ball rack, 3: ball, 4: lower thrust cap, 5: disc spring, 6: gasket, 7: nut, 8: main shaft, 9: shaft sleeve, 10: positioning table, 11: pressing slide block, 12: a sliding sleeve, 13: bearing bracket, 14: pressure spring, 15: bearing, 16: pin, 17: a guide rail.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and with reference to the following figures. It should be noted that: the following examples are illustrative and not intended to be limiting, and are not intended to limit the scope of the invention.
Example one
An elastic pressing type positioning and rotating mechanism for a thin-wall bowl-shaped part comprises a positioning pressing mechanism and a rotating mechanism;
the positioning and pressing mechanism comprises a positioning table 10, a guide rail 17, a pressing slide block 11, a bearing frame 13, a bearing 15 and a pressure spring 14, wherein the positioning table 10 is used for placing a thin-wall bowl-shaped part and is positioned below the bearing 15; the pressing slide block 11 is parallel to the top surface of the positioning table 10, one side of the pressing slide block 11 is slidably connected with the guide rail 17 and can be fixed at any position, the bearing frame 13 is vertically arranged downwards, the top end of the bearing frame passes through the pressing slide block 11 and is in threaded connection with the pressing slide block 11, the distance between the bottom end of the bearing frame 13 and the top surface of the positioning table 10 can be adjusted by adjusting the screwing length of threads, the bearing 15 is rotatably arranged at the bottom end of the bearing frame 13, the pressure spring 14 is sleeved on the bearing frame 13 above the bearing 15, and the pressure spring 14 contracts and expands along with the up-and-down movement of the bearing frame 13 and is used for adjusting pressing force;
the slewing mechanism is a precision slewing shaft system, the slewing precision can reach 0.001mm magnitude, and the slewing mechanism comprises an upper thrust cover 1, a main shaft 8, a shaft sleeve 9, a lower thrust cover 4 and a nut 7; the upper push-up cover 1 is a rotating part, can realize the axial positioning of the whole shaft system and is used as a connecting piece for connecting the positioning and pressing mechanism and the slewing mechanism; the main shaft 8 is a main rotating part and serves as a transmission part, external threads are machined at the bottom end of the main shaft and are used for screwing the nut 7 to realize the integral assembly of the rotating mechanism, and the main shaft 8 is connected with a driving motor through a belt wheel to realize the rotation of the mechanism when in use; the positioning table 10, the upper thrust cover 1 and the main shaft 8 are integrally manufactured, the shaft sleeve 9 is a static part, is sleeved outside the main shaft 8 and is coaxially arranged with the main shaft 8, and is connected with a rack of detection equipment to fix the whole mechanism when in use; the lower thrust cap 4 is sleeved outside the spindle 8 and forms interference fit with the spindle 8, and is used for supporting the whole swing mechanism, and the bottom surface of the upper thrust cap 1 and the top surface of the spindle sleeve 9, and the top surface of the lower thrust cap 4 and the bottom surface of the spindle sleeve 9 can rotate relatively; the nut 7 is connected to the bottom end of the main shaft 8 and used for applying preload to the upper thrust cover 1, the lower thrust cover 4 and the shaft sleeve 9 in the axial direction to enable the rotating part of the rotating mechanism to be tightly attached, and therefore the rotating precision is guaranteed.
When the device is used, the device is connected with a rack of detection equipment through a shaft sleeve 9, a main shaft 8 is connected with a driving motor through a belt pulley, a thin-wall bowl-shaped piece is based on a central hole, a pressing slide block 11 is urged to slide along a guide rail 17, after the limiting is reached, the outer surface of the bottom end of a bearing 15 is contacted with a workpiece, a pressure spring 14 is compressed, an axial pressing force is given to the thin-wall bowl-shaped piece, the thin-wall bowl-shaped piece is ensured to be completely attached to a positioning table 10, and therefore the; and starting a motor to drive the main shaft 8 to rotate, driving the thin-wall bowl-shaped part to synchronously rotate, and finishing measurement after the thin-wall bowl-shaped part rotates for one circle by collecting points through the sensor.
Example two
An elastic pressing type positioning and rotating mechanism for a thin-wall bowl-shaped part comprises a positioning pressing mechanism and a rotating mechanism;
the positioning and pressing mechanism comprises a positioning table 10, a guide rail 17, a pressing slide block 11, a sliding sleeve 12, a bearing frame 13, a bearing 15 and a pressure spring 14, wherein the positioning table 10 is used for placing a thin-wall bowl-shaped part and is positioned below the bearing 15, the positioning table 10 is of a barrel-shaped structure with a downward opening, the top end of the positioning table is processed into a boss, the outer diameter of the boss is matched according to the maximum inner hole diameter of the thin-wall bowl-shaped part, the positioning table and the bearing are in clearance fit, the clearance amount is 0.5mm, a groove with the bottom surface being a horizontal plane is formed in the barrel wall at the bottom end of the positioning table 10, and the groove is used for screwing in a screw to fixedly connect; the pressing slide block 11 is parallel to the top surface of the positioning table 10, one side of the pressing slide block 11 is slidably connected with the guide rail 17 and can be fixed at any position, the sliding sleeve 12 penetrates through the pressing slide block 11 and is vertically arranged downwards, the top end of the sliding sleeve is fixedly connected with the top surface of the pressing slide block 11, the number of the sliding sleeves 12 is 3, the bottom surface of the pressing slide block 11 is uniformly distributed in a circumferential array manner, a bearing frame 13 coaxially arranged with the sliding sleeve 12 is movably connected in the sliding sleeve 12, a through strip-shaped through hole is formed in the bearing frame 13, the length direction of the strip-shaped through hole is consistent with the axial direction of the bearing frame 13, a pin 16 is inserted in the strip-shaped through hole, the pin 16 penetrates out of one side or two sides of the sliding sleeve 12, so that the bearing frame 13 can move in the sliding sleeve 12 along the axial direction, and the bearing 15 is rotatably arranged at the bottom end of the bearing, the compression spring 14 is sleeved on the bearing frame 13 above the bearing 15, the bottom surface of the compression spring is in contact with the top surface of the bearing 15, the top surface of the compression spring is in contact with the bottom surface of the sliding sleeve 12, and the compression spring 14 contracts and expands along with the up-and-down movement of the bearing frame 13 and is used for adjusting pressing force; the bearing 15 is connected with the bearing frame 13 through a matching shaft, and can rotate along with the thin-wall bowl after being pressed tightly, so that the positioning and pressing mechanism is ensured to apply continuous pressing force in the rotating process of the thin-wall bowl, and the positioning and pressing of the thin-wall bowl are realized.
The slewing mechanism is a precision slewing shaft system, the slewing precision can reach 0.001mm magnitude, and the slewing mechanism comprises an upper thrust cover 1, a main shaft 8, a shaft sleeve 9, a lower thrust cover 4 and a nut 7; the upper push-up cover 1 is a rotating part and can realize axial positioning of the whole shaft system, axial through holes which are arranged in a circumferential array and are used for being connected with the main shaft 8 are formed in the position, close to the center, of the upper push-up cover 1, axial threaded through holes which are arranged in a circumferential array and are used for being connected with the positioning table 10 are formed in the position, close to the edge, of the upper push-up cover 1, the top end of the upper push-up cover is connected with the positioning table 10 of the positioning and pressing mechanism, and the bottom end of the upper push-up cover is connected with the top end of the; the main shaft 8 is a main rotating part and serves as a transmission part, axial threaded holes which are circumferentially arrayed are formed in the top end of the main shaft 8 and used for screwing in screws to realize connection with the upper push-up cover 1, external threads are formed in the bottom end of the main shaft and used for screwing the nut 7 to realize integral assembly of the rotating mechanism, and the main shaft 8 is connected with a driving motor through a belt wheel to realize rotation of the mechanism when in use; the shaft sleeve 9 is a static part, is sleeved outside the main shaft 8 and is coaxial with the main shaft 8, and is connected with a rack of detection equipment to fix the whole mechanism when in use; the lower thrust cap 4 is sleeved outside the spindle 8 and forms interference fit with the spindle 8, and is used for supporting the whole swing mechanism, and the bottom surface of the upper thrust cap 1 and the top surface of the spindle sleeve 9, and the top surface of the lower thrust cap 4 and the bottom surface of the spindle sleeve 9 can rotate relatively; the nut 7 is connected to the bottom end of the main shaft 8 and used for applying preload to the upper thrust cover 1, the lower thrust cover 4 and the shaft sleeve 9 in the axial direction to enable the rotating part of the rotating mechanism to be tightly attached, and therefore the rotating precision is guaranteed.
When the device is used, the device is connected with a rack of detection equipment through a shaft sleeve 9, a main shaft 8 is connected with a driving motor through a belt pulley, a thin-wall bowl-shaped piece is based on a central hole, a pressing slide block 11 is urged to slide along a guide rail 17, after the limiting is reached, the outer surface of the bottom end of a bearing 15 is contacted with a workpiece, a pressure spring 14 is compressed, an axial pressing force is given to the thin-wall bowl-shaped piece, the thin-wall bowl-shaped piece is ensured to be completely attached to a positioning table 10, and therefore the; and starting a motor to drive the main shaft 8 to rotate, driving the thin-wall bowl-shaped part to synchronously rotate, and finishing measurement after the thin-wall bowl-shaped part rotates for one circle by collecting points through the sensor.
EXAMPLE III
An elastic pressing type positioning and rotating mechanism for a thin-wall bowl-shaped part comprises a positioning pressing mechanism and a rotating mechanism;
the positioning and pressing mechanism comprises a positioning table 10, a guide rail 17, a pressing slide block 11, a sliding sleeve 12, a bearing frame 13, a bearing 15 and a pressure spring 14, wherein the positioning table 10 is used for placing a thin-wall bowl-shaped part and is positioned below the bearing 15, the positioning table 10 is of a barrel-shaped structure with a downward opening, the top end of the positioning table is processed into a boss, the outer diameter of the boss is matched according to the maximum inner hole diameter of the thin-wall bowl-shaped part, the positioning table and the bearing are in clearance fit, the clearance amount is 0.5mm, a groove with the bottom surface being a horizontal plane is formed in the barrel wall at the bottom end of the positioning table 10, and the groove is used for screwing in a screw to fixedly connect; the pressing slide block 11 is parallel to the top surface of the positioning table 10, one side of the pressing slide block 11 is slidably connected with the guide rail 17 and can be fixed at any position, the sliding sleeve 12 penetrates through the pressing slide block 11 and is vertically arranged downwards, the top end of the sliding sleeve is fixedly connected with the top surface of the pressing slide block 11, the number of the sliding sleeves 12 is 3, the bottom surface of the pressing slide block 11 is uniformly distributed in a circumferential array manner, a bearing frame 13 coaxially arranged with the sliding sleeve 12 is movably connected in the sliding sleeve 12, a through strip-shaped through hole is formed in the bearing frame 13, the length direction of the strip-shaped through hole is consistent with the axial direction of the bearing frame 13, a pin 16 is inserted in the strip-shaped through hole, the pin 16 penetrates out of one side or two sides of the sliding sleeve 12, so that the bearing frame 13 can move in the sliding sleeve 12 along the axial direction, and the bearing 15 is rotatably arranged at the bottom end of the bearing, the compression spring 14 is sleeved on the bearing frame 13 above the bearing 15, the bottom surface of the compression spring is in contact with the top surface of the bearing 15, the top surface of the compression spring is in contact with the bottom surface of the sliding sleeve 12, and the compression spring 14 contracts and expands along with the up-and-down movement of the bearing frame 13 and is used for adjusting pressing force; the bearing 15 is connected with the bearing frame 13 through a matching shaft, and can rotate along with the thin-wall bowl after being pressed tightly, so that the positioning and pressing mechanism is ensured to apply continuous pressing force in the rotating process of the thin-wall bowl, and the positioning and pressing of the thin-wall bowl are realized.
The invention can realize the quick clamping and positioning of the thin-wall bowl-shaped piece, and because the side wall of the thin-wall bowl-shaped piece is thinner and the roundness tolerance after processing is larger, the invention adopts a large-gap positioning method in the radial direction, thereby avoiding the radial deformation of the thin-wall bowl-shaped piece in the measuring process, and ensuring the accuracy of the inner diameter, the outer diameter and the roundness measurement.
The rotary mechanism is a precise rotary shaft system, the rotary precision can reach 0.001mm magnitude, and the rotary mechanism comprises an upper thrust cover 1, a main shaft 8, a shaft sleeve 9, a ball frame 2, balls 3, a lower thrust cover 4, a disc spring 5, a washer 6 and a nut 7;
the upper push cover 1 is a rotating part and can realize axial positioning of the whole shafting, axial through holes which are arranged in a circumferential array and are used for being connected with the main shaft 8 are formed in the position, close to the center, of the upper push cover 1, axial threaded through holes which are arranged in a circumferential array and are used for being connected with the positioning table 10 are formed in the position, close to the edge, of the upper push cover 1, the top end of the upper push cover is connected with the positioning table 10 of the positioning and pressing mechanism, and the bottom end of the upper push cover is connected with the top end of the main shaft 8 and serves as a connecting piece for.
The main shaft 8 is a main rotating part and serves as a transmission part, axial threaded holes which are circumferentially arrayed are formed in the top end of the main shaft 8 and used for being screwed in screws to be connected with the upper push cover 1, external threads are machined in the bottom end of the main shaft and used for screwing the nuts 7 to achieve integral assembly of the rotating mechanism, and the main shaft 8 is connected with the driving motor through a belt wheel during use to achieve rotation of the mechanism.
The shaft sleeve 9 is a static part, is sleeved outside the main shaft 8 and is coaxially arranged with the main shaft 8, the two ends of the shaft sleeve 9 are both provided with the same annular convex edges, and the shaft sleeve is connected with a frame of detection equipment to fix the whole mechanism in use.
The ball frame 2 is arranged between the main shaft 8 and the shaft sleeve 9, is a clamping and limiting mechanism for the balls 3, has the same shape as the shaft sleeve 9, is provided with a through hole for placing the balls 3, and can freely roll in the through hole, so that the balls 3 are arranged in a certain sequence and cannot be displaced in the rotation process, and the rotation precision is ensured; the balls 3 are standard zero-order steel balls, lubricating oil is smeared on the outer surface of the balls and then placed in corresponding through holes of the ball frame 2 and evenly distributed between the upper thrust cover 1 and the shaft sleeve 9, between the shaft sleeve 9 and the lower thrust cover 4 and between the shaft sleeve 9 and the main shaft 8, dense ball shafting is arranged in the axial direction and the radial direction of the main shaft 8, the dense arrangement of the balls 3 is favorable for reducing the influence of various errors on the position of a rotation center, an effective contact surface is increased, an average effect is played, and the rotation precision of the shafting is favorably improved; the dense balls 3 are arranged in an approximate spiral line in the arrangement mode, so that each ball 3 does not roll repeatedly according to the raceway of the ball 3 when in operation, repeated abrasion is reduced, and the rotation precision of a shaft system is kept for a long time; adopt interference assembly between main shaft 8, axle sleeve 9 and the ball 3, this kind of assembly method can make main shaft 8, axle sleeve 9 and ball 3 produce elastic deformation, reduces the influence of the dimensional error of parts such as main shaft 8, axle sleeve 9 and ball 3 and geometric shape error, can not only improve the stationarity of shafting gyration, gyration precision, can also increase the rigidity of shafting.
The lower thrust cap 4 is sleeved outside the spindle 8 and forms interference fit with the spindle 8 for supporting the whole swing mechanism, and the bottom surface of the upper thrust cap 1 and the top surface of the spindle sleeve 9 and the top surface of the lower thrust cap 4 and the bottom surface of the spindle sleeve 9 can rotate relatively.
The bottom of the main shaft 8 is close to the bottom of the lower thrust cover 4, a disc spring 5 is sleeved on the bottom of the lower thrust cover 4, a recess matched with the disc spring 5 is formed in the bottom of the lower thrust cover 4 upwards, and the disc spring 5 is used for reducing the influence of mutual position errors among the main shaft 8, the shaft sleeve 9, the upper thrust cover 1 and the lower thrust cover 4 and improving the axial rotation precision and the axial rigidity of a shaft system.
The part of the main shaft 8 between the nut 7 and the disc spring 5 is sleeved with a washer 6, and the washer 6 is used for transferring preload.
The nut 7 is connected to the bottom end of the main shaft 8 and used for applying preload to the upper thrust cover 1, the lower thrust cover 4 and the shaft sleeve 9 in the axial direction to enable the rotating part of the rotating mechanism to be tightly attached, and therefore the rotating precision is guaranteed.
The rotation precision of the rotation mechanism reaches 0.003mm, and the precision error is within +/-0.001 mm under different rotation speeds, so that the system error of a transmission system is reduced to the maximum extent.
When the device is used, the device is connected with a rack of detection equipment through a shaft sleeve 9, a main shaft 8 is connected with a driving motor through a belt pulley, a thin-wall bowl-shaped part is fixedly arranged on a positioning table 10 in a clearance fit mode by taking a central hole as a reference, a pressing sliding block 11 is urged to slide along a guide rail 17, after the position is limited, the outer surface of the bottom end of a bearing 15 contacts a workpiece, a pressure spring 14 is compressed, axial pressing force is applied to the thin-wall bowl-shaped part, the thin-wall bowl-shaped part is ensured to be completely attached to the positioning table 10, and therefore the; and starting a motor to drive the main shaft 8 to rotate, driving the thin-wall bowl-shaped part to synchronously rotate, and finishing measurement after the thin-wall bowl-shaped part rotates for one circle by collecting points through the sensor.
The invention realizes the integrated design of the rotary shaft system and the workpiece positioning table 10, avoids the occurrence of matching errors between the transmission mechanism and the positioning mechanism, has the remarkable advantages of small friction moment, large load, high reliability and the like, can effectively avoid the occurrence of system errors caused by low rotation precision of the rotary shaft system, and can meet the sampling point requirement of rapid detection of the annular thin plate.
Example four
A detection device with an elastic pressing type positioning and rotating mechanism comprises a rack, a driving mechanism, a measuring mechanism, the elastic pressing type positioning and rotating mechanism as described in the third embodiment, a control system and a measuring and analyzing system, wherein the elastic pressing type positioning and rotating mechanism is connected with the rack of the device through a shaft sleeve 9, the driving mechanism is connected with a main shaft 8 through a belt wheel to drive the elastic pressing type positioning and rotating mechanism to rotate, the measuring mechanism is provided with a sensor, the sensor is used for collecting data points at the measured position of a workpiece (a thin-wall bowl-shaped part), and more than 500 points can be collected in one rotation circle, so that the standard deviation of a measuring result is effectively reduced, the measuring precision is improved, the sensor is provided with a matched A/D conversion and amplification circuit which can directly output a digital signal, and meanwhile, the circuit has a gain adjusting function, the linearity of the sensor is convenient to condition, the control system is used for realizing the control of each electrical element (an electromagnetic valve, a relay, a motor and the like), and further controlling the mechanical actions of the elastic pressing type positioning and rotating mechanism, the driving mechanism and the measuring mechanism to finish the rotation measurement; the measurement and analysis system is used for realizing the measurement function of the device, man-machine interaction, data display, storage and analysis, and the unique sensor signal conditioning function and measurement result compensation function meet the precision optimization requirement in a relative measurement mode; meanwhile, the device has a sampling point control setting function and a rotation turn number adjusting function for rotation measurement, and the measurement precision is effectively improved.
The measuring process of the detection equipment with the elastic compression type positioning and rotating mechanism comprises the following steps: starting a control system and a measuring system, placing a standard component for zero adjustment and quantity value tracing of a sensor on an elastic compression type positioning and rotating mechanism, taking down the standard component after setting the zero position of the sensor, placing a workpiece (thin-wall bowl-shaped component), starting the measuring and analyzing system, rotating the workpiece, collecting signals by the sensor, automatically stopping the program after the rotation time set by the program is reached, and calculating, displaying a measuring result and carrying out data statistical analysis by the measuring and analyzing system according to the signals collected by the sensor.
The standard component adopts a local profiling structure design, the rigidity of the standard component is improved while the calibration function is met, the standard component is not easy to deform, and the stability of a measured value is ensured.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in connection with embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an orientation of upper and lower. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (14)
1. An elastic pressing type positioning and rotating mechanism for a thin-wall bowl-shaped part is characterized by comprising a positioning pressing mechanism and a rotating mechanism;
the positioning and pressing mechanism comprises a positioning table and a pressing mechanism, wherein the positioning table is used for placing the thin-wall bowl-shaped part and is positioned below the pressing mechanism; the pressing mechanism comprises a guide rail, a pressing sliding block, a bearing frame, a bearing and a pressure spring, the pressing sliding block is parallel to the top surface of the positioning table, one side of the pressing sliding block is slidably connected with the guide rail and can be fixed at any position, the bearing frame is vertically arranged downwards, the top end of the bearing frame penetrates through the pressing sliding block and is in threaded connection with the pressing sliding block, the bearing is rotatably arranged at the bottom end of the bearing frame, and the pressure spring is sleeved on the bearing frame above the bearing;
the slewing mechanism comprises a main shaft fixedly connected to the bottom end of the positioning table and capable of rotating along the axial direction and a shaft sleeve sleeved outside the main shaft, and the shaft sleeve and the main shaft are coaxially arranged and form relative rotation with the main shaft.
2. The elastic hold-down type positioning and rotating mechanism as claimed in claim 1, wherein said hold-down mechanism further comprises a hollow sliding sleeve, said sliding sleeve is vertically and downwardly disposed through said hold-down slider, the top end of said sliding sleeve is fixedly connected to the top surface of said hold-down slider, a bearing frame coaxially disposed with said sliding sleeve is movably connected in said sliding sleeve, said bearing frame can move in said sliding sleeve along the axial direction.
3. The elastic pressing type positioning and rotating mechanism as claimed in claim 1 or 2, further comprising an upper thrust cap, a lower thrust cap and a nut, wherein the upper thrust cap is fixedly connected to the top end of the spindle, the bottom surface of the upper thrust cap and the top surface of the sleeve can rotate relatively, the lower thrust cap is sleeved outside the spindle, the top surface of the lower thrust cap and the bottom surface of the sleeve can rotate relatively, and the nut is connected to the bottom end of the spindle through a screw thread.
4. The elastic hold-down type positioning and rotating mechanism as claimed in claim 2, wherein said bearing frame has a through-hole, the length direction of the through-hole is the same as the axial direction of said bearing frame, a pin is inserted into said through-hole, and said pin is extended out from one side or both sides of said sliding sleeve.
5. The resilient clamp-type positioning and slewing mechanism of claim 1, wherein said clamping slide slides in a horizontal direction or a vertical direction on said guide rails.
6. The resilient clamp-type positioning and slewing mechanism of claim 1, wherein said bearings are replaced with rollers or balls having a flexible surface material.
7. The elastic hold-down type positioning and rotating mechanism as claimed in claim 2, wherein the number of said sliding sleeves is 1-8, and when the number of said sliding sleeves is 1, said sliding sleeves are disposed at the center of the bottom surface of said hold-down slider; when the number of the sliding sleeves is larger than 1, the sliding sleeves are uniformly distributed on the bottom surface of the pressing sliding block in a circumferential array.
8. The elastic hold-down type positioning and rotating mechanism as claimed in claim 3, wherein said positioning table is a barrel-shaped structure with a downward opening, the top end of the positioning table is formed into a boss, the outer diameter of the boss is matched with the maximum inner hole diameter of the thin-walled bowl, and the outer diameter of the boss and the boss are in clearance fit; the barrel wall at the bottom end is provided with a groove with a horizontal bottom surface, and the groove is used for screwing in a screw to fixedly connect the positioning table with the upper push-up cover.
9. The elastic hold-down type positioning and rotating mechanism as claimed in claim 3, wherein the two ends of the shaft sleeve are provided with the same annular convex edge, a ball rack is disposed between the spindle and the shaft sleeve, the ball rack has the same shape as the shaft sleeve, balls capable of freely rolling in the ball rack are embedded in the ball rack, and the balls are uniformly distributed between the upper thrust cover and the shaft sleeve, between the shaft sleeve and the lower thrust cover, and between the shaft sleeve and the spindle for realizing the shafting rotation of the spindle.
10. The elastic hold-down type positioning and rotating mechanism as claimed in claim 3, wherein the top end surface of the spindle is provided with axial threaded holes arranged in a circumferential array for screwing screws to connect with the upper thrust cover.
11. The elastic pressing type positioning and rotating mechanism as claimed in claim 3, wherein the top thrust cover has axial through holes disposed near the center thereof in a circumferential array for connecting with the spindle, and has axial threaded holes disposed near the edge thereof in a circumferential array for connecting with the positioning table.
12. The elastic hold-down type positioning and rotating mechanism as claimed in claim 3, wherein a belleville spring is sleeved on the bottom of the spindle close to the bottom of the lower thrust cap, and a recess matching with the belleville spring is formed on the bottom of the lower thrust cap.
13. The use method of the elastic press-type positioning and rotating mechanism as claimed in any one of claims 1 to 12, wherein the shaft sleeve is connected with a frame of the equipment, and the main shaft is connected with a driving motor through a belt wheel to realize the rotation of the mechanism; the thin-wall bowl-shaped part is installed on the positioning table in a clearance fit mode by taking the central hole as a reference, the pressing sliding block is urged to slide along the guide rail, after the position is limited, the outer surface of the bottom end of the bearing contacts with a workpiece, the pressing spring is compressed, axial pressing force is provided for the thin-wall bowl-shaped part, the thin-wall bowl-shaped part is ensured to be completely attached to the positioning table, and therefore the positioning of the workpiece is completed; and starting a motor to drive the main shaft to rotate, driving the thin-wall bowl-shaped piece to synchronously rotate, and finishing measurement after the thin-wall bowl-shaped piece rotates for one circle by a sensor.
14. The utility model provides a check out test set with elasticity compresses tightly formula location and rotation mechanism which characterized in that: the device comprises a machine frame, a driving mechanism, a measuring mechanism, an elastic pressing type positioning and rotating mechanism according to any one of claims 1 to 12, a control system and a measuring and analyzing system, wherein the elastic pressing type positioning and rotating mechanism is fixed on the machine frame, the driving mechanism drives the elastic pressing type positioning and rotating mechanism to rotate, the measuring mechanism is used for acquiring coordinate signals of different positions on the thin-wall bowl-shaped member, and the measuring and analyzing system performs calculation, display and data statistical analysis through the signals acquired by the measuring mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811169807.2A CN111006624A (en) | 2018-10-08 | 2018-10-08 | Elastic pressing type positioning and rotating mechanism for thin-wall bowl and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811169807.2A CN111006624A (en) | 2018-10-08 | 2018-10-08 | Elastic pressing type positioning and rotating mechanism for thin-wall bowl and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111006624A true CN111006624A (en) | 2020-04-14 |
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ID=70110604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811169807.2A Pending CN111006624A (en) | 2018-10-08 | 2018-10-08 | Elastic pressing type positioning and rotating mechanism for thin-wall bowl and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111006624A (en) |
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2018
- 2018-10-08 CN CN201811169807.2A patent/CN111006624A/en active Pending
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