CN115302288B - Device and method for milling precision correction based on three-point positioning - Google Patents
Device and method for milling precision correction based on three-point positioning Download PDFInfo
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- CN115302288B CN115302288B CN202211239304.4A CN202211239304A CN115302288B CN 115302288 B CN115302288 B CN 115302288B CN 202211239304 A CN202211239304 A CN 202211239304A CN 115302288 B CN115302288 B CN 115302288B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
- B23Q15/26—Control or regulation of position of tool or workpiece of angular position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/15—Devices for holding work using magnetic or electric force acting directly on the work
- B23Q3/154—Stationary devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
- B23Q3/186—Aligning devices
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Abstract
The application discloses a device and a method for correcting milling precision based on three-point positioning, and the device comprises a supporting table, a guide rail group, a supporting plate for supporting the side surface or the bottom surface of a part and an adjuster for adjusting the height of the supporting plate; the upper surface of the support table is provided with a guide rail group, the guide rail group comprises at least three guide rails, and the guide rails are parallel to each other; a sliding block matched with the guide rail is arranged on the guide rail, a lifting device is arranged on the sliding block, and a contact sensor used for contacting the bottom of the part is arranged on the lifting device; a plurality of regulators are arranged on both sides of the guide rail group; the support plate is disposed on the adjuster, and the support plate is located above the contact sensor. According to the device and the method for correcting the milling precision based on the three-point positioning, the technical problem of large part machining error is solved by matching the contact sensor with the regulator, the milling posture of the part is relatively stable, the error caused by part machining is reduced, and the machining requirement of the part is met.
Description
Technical Field
The application relates to the field of precision milling processes, in particular to a device and a method for milling precision correction based on three-point positioning.
Background
With the progress of the times, the requirement on the milling precision of current processing is gradually improved, a common processing technology is to fix a part on milling equipment in a reference manner, then a coordinate system is determined, feed milling is carried out according to coordinate values, milling is at least carried out by rough milling and finish milling, a processing object is processed in a rough milling process in a milling deep feed mode, the processing efficiency is higher, the size of the processing object after rough milling is finished requires a deviation in millimeter level from the standard, and then slow feed milling is carried out by finish milling, so that the precision is improved.
For some machined parts, the machining is carried out on the basis of the original product, whether the product is qualified or not needs to be tested by installing the parts on a relative structure, and the machining of the parts reaches the standard and needs to be repeatedly machined, assembled, detected and reprocessed; due to the fact that various deviations easily exist in the posture change of the part in the repeated correction process, the machining error of the part is large, and the machining requirement cannot be met.
The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.
Disclosure of Invention
The application mainly aims to provide a device and a method for milling precision correction based on three-point positioning, and aims to solve the technical problem of large part machining error.
In order to achieve the purpose, the application provides a device for correcting milling precision based on three-point positioning, which comprises a supporting table, a guide rail set, a supporting plate for supporting the side surface or the bottom surface of a part and an adjuster for adjusting the height of the supporting plate;
the upper surface of the support table is provided with the guide rail group, the guide rail group comprises at least three guide rails, and the guide rails are parallel to each other;
a sliding block matched with the guide rail is arranged on the guide rail, a lifting device is arranged on the sliding block, and a contact sensor used for contacting the bottom of the part is arranged on the lifting device;
the two sides of the guide rail group are respectively provided with a plurality of regulators;
the support plate is disposed on the adjuster, and the support plate is located above the contact sensor.
Optionally, the adjuster comprises a lifter and a drive;
the driving device drives the lifting rod to lift;
the supporting plate is arranged at the top of the lifting rod.
Optionally, the device further comprises a mounting cylinder, wherein the driving device comprises a driving motor, a driving gear and strip-shaped teeth;
the lifting rod is arranged in the mounting cylinder, and the driving motor and the driving gear are fixed on the mounting cylinder;
the driving motor drives the driving gear to rotate;
the driving gear is in transmission connection with the strip-shaped teeth;
the bar-shaped teeth are arranged in the length direction of the lifting rod.
Optionally, the lifting device further comprises a guide block arranged on the top of the lifting rod,
the guide block is provided with a guide groove, and the support plate is arranged in the guide groove in a matching manner;
the guiding groove inner wall is provided with at least one magnetic suction block, and the supporting plate is provided with a magnetic suction strip corresponding to the magnetic suction block.
Optionally, the inner wall of the guide groove is provided with two magnetic suction blocks.
Optionally, a contact switch is arranged on the supporting plate, and the contact switch is used for triggering a contact signal by a contact part.
Optionally, the guide rail comprises a limiting part and an extending part, and the lifting device comprises a stroke cylinder;
the extending parts are arranged above the limiting parts and are communicated with each other;
the sliding block is connected in the limiting part in a sliding manner;
the stroke cylinder is arranged at the upper end of the sliding block and is positioned in the extension part;
the contact sensor is arranged at the piston end of the stroke cylinder.
Optionally, the device further comprises a pushing device for pushing the sliding block to move on the guide rail.
In addition, in order to achieve the above object, the present application further provides a method for correcting milling precision based on three-point positioning, which uses a device for correcting milling precision based on three-point positioning, and includes the following steps:
supporting a part by the support plate and contacting a bottom of the part with the contact sensor;
acquiring bottom parameters of the part by using the contact sensor;
and adjusting the posture of the part according to the bottom parameter through an adjuster to enable the bottom parameter of the part to reach a set value.
Optionally, the adjusting, by the adjuster, the posture of the part according to the bottom parameter so that the bottom parameter of the part reaches a set value includes:
a, step a: separating the contact sensor from the part after the bottom parameters of the part are obtained;
step b: adjusting the posture of the part according to the bottom parameters through the adjuster;
step c: contacting the contact sensor with the bottom of the part again to obtain the bottom parameter of the part;
step d: repeating the steps a to c until the bottom parameter of the part reaches a set value.
The beneficial effect that this application can realize:
when the device based on three-point positioning milling precision correction is used, a part to be positioned is placed on the supporting plate, the part is positioned through the supporting plate, the sliding block is adjusted, the contact sensor is located below the part, the lifting device is started, the contact sensor located on the lifting device is made to contact the bottom of the part, at least three guide rails are arranged, after the contact sensor contacts the part, the three-point surface forming principle is utilized, the inclination information of the bottom of the part is obtained, when all the contact sensors simultaneously contact the bottom of the part, the bottom of the surface part is parallel, when a time difference contacts the bottom plate of the part, the bottom of the surface part is inclined, the inclination angle of the bottom of the part is calculated through the contact time difference of the contact sensor and the distance between the contact sensors, according to the inclination angle of the bottom of the part, the upper height and the lower height of the supporting plate are adjusted through adjusting various regulators at different positions, the inclination angle of the bottom of the part is adjusted, so that the inclined bottom of the part reaches specified parameters, finally, whether the inclination angle of the bottom of the part is qualified through the contact sensor is detected again through the contact sensor, if the part is unqualified, the part is repeatedly adjusted and detected until the part is qualified, the part is clamped by the fixture, and the relative error of the milling posture of the part is reduced, and the part is stable machining requirement is met. The technical problem of large part machining error is solved.
According to the device and the method based on three-point positioning milling precision correction, the technical problem of large part machining error is solved through the matched use of the contact sensor and the regulator, the part milling posture is relatively stable, the error caused by part machining is reduced, and the machining requirement of parts is met.
Drawings
Fig. 1 is a schematic structural diagram of a device based on three-point positioning milling precision correction according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a regulator provided in an embodiment of the present application;
fig. 3 is a schematic view illustrating a contact plate installation provided in an embodiment of the present application;
fig. 4 is a schematic structural view of a contact plate and a guide slot provided in an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a touch sensor location provided by an embodiment of the present application;
1-supporting table, 2-regulator, 3-supporting plate, 4-guide rail, 5-slide block, 6-stroke cylinder, 7-contact sensor, 101-mounting plate, 102-pushing device, 201-mounting cylinder, 202-lifting rod, 203-driving wheel, 204-strip-shaped tooth, 205-guide block, 206-guide groove, 207-magnetic attraction block, 301-magnetic attraction block, 302-contact switch, 401-limiting part and 402-extending part.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
For parts with common shapes, a numerical control special machine is usually used for processing, the pose of a processing object in the space can be detected in real time by utilizing a mechanical arm, and a processing program is corrected through secondary programming, so that the influence of errors on processing precision is improved in the processing process.
However, for part of specially processed parts, the processing is carried out on the basis of the original product, whether the product is qualified or not needs to be tested by installing the part on a relative structure, and the processing of the part reaches the standard and needs to be repeatedly processed, assembled, detected and reprocessed; the direct numerical control special machine needs to be programmed and checked for many times in one-step machining and forming, so that the application cost is high, and the machining efficiency is extremely low. The more consideration for the processing of the part is to carry out the local correction and milling of the part through a semi-automatic equipment matching tool, then carry out pre-assembly and finally carry out precision grinding. Considering that various deviations are easy to exist in the posture change of a part in the correction process, and the deviations are generated by multiple dimensions such as mechanical factors and human factors, when the bottom surface of a single part has an inclined angle, the secondary machining and mounting process needs complicated correction, so that how to improve the workload in the secondary mounting process and shorten the precision check is worth researching.
Referring to fig. 1-5, a device and a method for correcting milling precision based on three-point positioning according to a first embodiment of the present application provides a device for correcting milling precision based on three-point positioning, which includes a support table 1, a guide rail set, a support plate 3 for supporting a side surface or a bottom surface of a part, and an adjuster 2 for adjusting the height of the support plate; the upper surface of the support table 1 is provided with the guide rail set, the guide rail set comprises at least three guide rails 4, and the guide rails 4 are parallel to each other; a sliding block 5 matched with the guide rail 4 is arranged on the guide rail 4, a lifting device is arranged on the sliding block 5, and a contact sensor 7 used for contacting the bottom of the part is arranged on the lifting device; the two sides of the guide rail group are respectively provided with a plurality of regulators 2; the support plate 3 is provided on the regulator 2, and the support plate 3 is located above the contact sensor 7.
The utility model provides a device based on three point location mills precision and revises all is provided with regulator 2 in the both sides of propping up supporting bench 1, is provided with backup pad 3 on regulator 2, and backup pad 3 is used for supporting the part to be positioned, and regulator 2 is used for adjusting the height of backup pad 3, and guide rail group sets up the upper surface at supporting bench 1, and regulator 2 is located the both sides of guide rail group length direction to 2 adjusting part's of regulator gesture, guide rail group include at least three above guide rail 4, and be parallel to each other between the guide rail 4, be provided with on the guide rail 4 with guide rail 4 complex slider 5, be provided with elevating gear on the slider 5, be provided with on the elevating gear and be used for the contact pick-up 7 of part bottom. When the device based on three-point positioning milling precision correction is used, a part to be positioned is placed on the supporting plate 3, the part is positioned through the supporting plate 3, then the sliding block 5 is adjusted, the contact sensors 7 are located below the part, the lifting device is started, the contact sensors 7 located on the lifting device are made to contact the bottom of the part, at least more than three guide rails 4 are arranged, after the part is contacted through the contact sensors 7, the inclination information of the bottom of the part is obtained by utilizing the principle of three-point surface forming, when all the contact sensors 7 simultaneously collide with the bottom of the part, the bottom of the part is parallel, when a time difference collides with the bottom plate of the part, the bottom of the part is inclined, the inclination angle of the bottom of the part is calculated by the contact time difference of the contact sensors 7 and the distance between the contact sensors 7, the upper height and the lower height of the supporting plate 3 are adjusted by adjusting the regulators 2 at different positions, the inclination angle of the bottom of the part is adjusted, the inclination angle of the bottom of the part reaches specified parameters, and finally, whether the inclination angle of the bottom of the part is qualified or not can be detected by the contact sensors 7 again, if the part is repeatedly adjusted and detected, the qualified milling precision correction is qualified, the part is qualified, the milling precision correction is reduced, the part is ensured, and the relative posture of the part milling tool, and the part is stable machining precision of the part is ensured, and the part is stable machining posture of the part. The technical problem of large part machining error is solved.
The adjuster 2 is used for adjusting the height of the supporting plate 3 up and down so as to change the posture of the part, and the adjuster 2 can be a telescopic device, a crank device and the like, and in the embodiment, as shown in fig. 2, the adjuster 2 comprises a lifting rod 202 and a driving device;
the driving device drives the lifting rod 202 to lift;
the support plate 3 is disposed on top of the lifting rod 202. This embodiment passes through the drive arrangement drive lifter 202 goes up and down to the realization is to the lift of backup pad 3, simple structure, and efficiency is high-efficient, guarantees to go up and down backup pad 3 that can be quick.
In the embodiment, the device further comprises a mounting cylinder 201, and the driving device comprises a driving motor, a driving gear and strip-shaped teeth 204;
the lifting rod 202 is arranged in the mounting cylinder 201, and the driving motor and the driving gear are fixed on the mounting cylinder 201;
the driving motor drives the driving gear to rotate;
the driving gear is in transmission connection with the strip-shaped teeth 204;
the bar-shaped teeth 204 are arranged in the length direction of the lifting rod 202. In the embodiment, the driving gear is driven by the driving motor to rotate, the driving gear drives the bar-shaped teeth 204 to move up and down, so that the lifting rod 202 is driven to move up and down, the supporting plates 3 are driven to move up and down due to the supporting plates 3 arranged on the lifting rod 202, and the postures of parts are adjusted due to the fact that the parts are supported by the supporting plates 3 by adjusting the up-and-down heights of the different supporting plates 3;
as shown in fig. 3 and 4, the lifting device further comprises a guide block 205, the guide block 205 is arranged on the top of the lifting rod 202,
the guide block 205 is provided with a guide slot 206, and the support plate 3 is fitted in the guide slot 206;
at least one magnetic suction block 207 is arranged on the inner wall of the guide groove 206, and a magnetic suction strip 301 corresponding to the magnetic suction block 207 is arranged on the support plate 3. In this embodiment, a guide block 205 is provided on the top of the lifting rod 202, a guide slot 206 is provided on the guide block 205, and the support plate 3 is fittingly installed in the guide slot 206; the inner wall of the guide groove 206 is provided with at least one magnetic suction block 207, the support plate 3 is provided with a magnetic suction strip 301 corresponding to the magnetic suction block 207, the support plate 3 is inserted into the guide groove 206, and then the magnetic suction block 207 and the magnetic suction strip 301 are connected through magnetic force, so that the support plate 3 can be firmly fixed in the guide groove 206, and the parallelism of the support plate 3 is ensured. The magnetic attraction block 207 may be an electromagnet to achieve detachable connection to the support plate 3, and when the support plate 3 is inserted into the guide slot 206, the electromagnet is activated to achieve fixation.
The inner wall of the guide groove 206 can be provided with a plurality of magnetic blocks 207, the more the magnetic blocks 207 are, the more the support plate 3 is fixed, the more firmly the magnetic blocks 207 are, in this embodiment, the inner wall of the guide groove 206 is provided with two magnetic blocks 207. By means of the two-point linear separation, the support plate 3 can be fixed on a straight line, and the support plate 3 is ensured not to incline or shift, so that the support plate 3 can be fixed in the guide groove 206 in parallel.
As shown in fig. 4, a contact switch 302 is disposed on the supporting plate 3, and the contact switch 302 is used for triggering a contact signal by a contact part. When the part is placed on the support plate 3, the contact switch 302 is touched, and the contact switch 302 triggers a contact signal to be transmitted to a computer or a worker, so that the computer or the worker can conveniently perform the next operation.
As shown in fig. 5, the guide rail 4 includes a limiting portion 401 and an extending portion, and the lifting device includes a stroke cylinder 6;
the extending parts are arranged above the limiting part 401 and are communicated with each other;
the sliding block 5 is connected in the limiting part 401 in a sliding manner;
the stroke cylinder 6 is arranged at the upper end of the sliding block 5 and is positioned in the extending part;
the contact sensor 7 is provided at the piston end of the stroke cylinder 6. In this embodiment, the guide rail 4 includes a limiting portion 401 and an extending portion, the limiting portion 401 and the extending portion are mutually communicated and perpendicular to each other, so as to ensure that the stroke cylinder 6 on the slider 5 can stably work in the vertical direction, the outer wall of the slider 5 is matched with the limiting portion 401, wherein the slider 5 corresponds to the limiting portion 401, the limiting portion 401 and the slider 5 are physically limited, namely, lubricating oil is applied between the limiting portion 401 and the slider 5, the inner cavity of the limiting portion 401 and the outer wall of the slider 5 need to improve surface smoothness, so as to ensure the friction coefficient between the slider 5 and the limiting portion 401.
The moving mode of the sliding block 5 on the moving of the guide rail 4 can be manually pushed or mechanically passed, and in this embodiment, as shown in fig. 1, the moving mode further comprises a pushing device for pushing the sliding block 5 on the moving of the guide rail 4. The pushing device 102 is an existing pushing mechanism, the pushing device 102 may be an existing stroke cylinder 6, or an existing ball screw, and the pushing device 102 is mainly used for ensuring the pushing distance of the slider 5. The guide rails 4 are designed side by side, one push-out device 102 corresponds to the sliding block 5 in one guide rail 4, the upper end of the guide rail 4 can be provided with a graduated scale, so that the current position of the sliding block 5 is determined, the middle point of the sliding block 5 is overlapped with the central axis of the stroke cylinder 6, the contact sensor 7 is positioned on the central axis of the stroke cylinder 6, and the position data of the contact sensor 7 can be obtained by combining the graduated scale with the size of the sliding block 5.
In addition, in order to achieve the above object, the present application further provides a method for correcting milling precision based on three-point positioning, which uses a device for correcting milling precision based on three-point positioning, and includes the following steps:
supporting a part by the support plate 3 and bringing the bottom of the part into contact with the contact sensor 7;
acquiring bottom parameters of the part by using the contact sensor 7;
and adjusting the posture of the part through the regulator 2 according to the bottom parameters to enable the bottom parameters of the part to reach set values.
The embodiment is an operation embodiment, and a method for milling precision correction based on three-point positioning, which includes the following operation steps,
step one, placing parts, namely setting one regulator 2 as a reference regulator 2, setting the rest regulators 2 as supporting regulators 2, abutting the side wall of the part against a contact plate 3 of the reference regulator 2, and then placing the bottom of the part on the contact plates 3 of the other regulators 2 and keeping the bottom of the part relatively stable. The contact plate 3 forms temporary support, and parts can be adsorbed through the contact plate 3 when necessary, so that the parts are prevented from falling off at will. By constructing the parallel bottom reference surfaces, the later-stage milling measurement and the local cutter repairing measurement are facilitated.
And step two, performing reference measurement, namely moving the sliding block 5 to a corresponding position below the part, driving the contact sensor 7 to synchronously move upwards through the stroke cylinder 6, enabling the contact sensor 7 to touch the bottom of the part, then transmitting a signal to a computer by the contact sensor 7, stopping the movement of the stroke cylinder 6, and analyzing the contact time difference of the contact sensor 7 and the distance between the sliding blocks 5 by the computer to calculate an inclination angle so as to obtain attitude parameters. Wherein contact sensor 7 is current commodity, obtains touch signal through contact sensor 7 touching part to stroke cylinder 6 stop work, and contact sensor 7 rise process is slow relatively, thereby effectively reduces the error risk that probably appears.
And step three, adjusting the posture of the part, driving the contact sensor 7 to be separated from the part through the stroke cylinder 6, then pushing the bottom of the part through the support regulator 2 to correct the posture, driving the contact sensor 7 to be in contact with the bottom of the part through the stroke cylinder 6 after correction, obtaining posture parameters through computer analysis again, and repeating the step until the posture parameters are within the tolerance range allowed by tool pairing to complete posture adjustment.
And step four, milling and fixing, clamping two sides of the part after the posture adjustment is finished through a tool, and enabling the milling posture to be relatively stable. Wherein the frock is current centre gripping frock, and its frock lower extreme is less than the part lower extreme generally, and the moving direction of its frock centre gripping part is 90 degrees angles with 2 relative position directions of regulator, avoids regulator 2 and frock contact.
The adjusting the posture of the part through the adjuster 2 according to the bottom parameter to enable the bottom parameter of the part to reach a set value comprises the following steps:
step a: after the bottom parameters of the part are obtained, the contact sensor 7 is separated from the part;
step b: adjusting the posture of the part according to the bottom parameters through the regulator 2;
step c: contacting the contact sensor 7 with the bottom of the part again to obtain the bottom parameter of the part;
step d: repeating the steps a to c until the bottom parameter of the part reaches a set value.
The device of this application can become the gesture of face principle adjustment part through three points, can also the correction device in the artificial deviation that probably appears of overall arrangement in-process. Form the preliminary bracing through regulator 2, utilize a plurality of regulators 2 to form a plurality of strong points, thereby change the gesture of placing of part through the adjustment to the strong point, utilize contact sensor 7 to contact the part bottom, utilize the principle that contact sensor 7 three points become the face, the cooperation contact time difference confirms the face radian that forms, and the distance between the regulator 2 is invariable to regulator 2 can adjust according to computer data feedback.
The application utilizes the strip-shaped teeth 204 on the lifting rod 202 to be matched with the driving wheel 203, so that the moving distance of the lifting rod 202 can be quantized and controlled. The magnetic suction block 207 on the guide block 205 can generate electromagnetic suction when necessary, so that the posture of the contact plate 3 is fixed, the magnetic suction strip 301 on the contact plate 3 generates a magnetic suction effect, parts can be stabilized, and external tools can clamp the parts in relative postures conveniently.
According to the method, under the condition that the posture of the part is deviated, the posture of the part is gradually corrected, so that the posture of the part is adjusted to the specified position, the rough machining precision is ensured, and the deviation risk possibly existing in the subsequent finish machining is reduced.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (8)
1. A device for correcting milling precision based on three-point positioning is characterized by comprising a supporting table, a guide rail set, a supporting plate for supporting the side surface or the bottom surface of a part and an adjuster for adjusting the height of the supporting plate;
the upper surface of the support table is provided with the guide rail group, the guide rail group comprises at least three guide rails, and the guide rails are parallel to each other;
a sliding block matched with the guide rail is arranged on the guide rail, a lifting device is arranged on the sliding block, and a contact sensor used for contacting the bottom of the part is arranged on the lifting device;
the two sides of the guide rail group are respectively provided with a plurality of regulators, each regulator comprises a lifting rod and a driving device, the driving device drives the lifting rod to lift, and the supporting plate is arranged at the top of the lifting rod;
the supporting plate is arranged on the regulator and is positioned above the contact sensor;
also comprises a guide block which is arranged at the top of the lifting rod,
the guide block is provided with a guide groove, and the support plate is arranged in the guide groove in a matching manner;
the guiding groove inner wall is provided with at least one magnetism piece of inhaling, be provided with on the backup pad with magnetism inhale the strip of inhaling that the piece corresponds.
2. The device for correcting milling precision based on three-point positioning as claimed in claim 1, further comprising a mounting cylinder, wherein the driving device comprises a driving motor, a driving gear and strip teeth;
the lifting rod is arranged in the mounting cylinder, and the driving motor and the driving gear are fixed on the mounting cylinder;
the driving motor drives the driving gear to rotate;
the driving gear is in transmission connection with the strip-shaped teeth;
the bar-shaped teeth are arranged in the length direction of the lifting rod.
3. The device for correcting the milling precision based on the three-point positioning as claimed in claim 1, wherein the inner wall of the guiding groove is provided with two magnetic blocks.
4. The device for correcting the milling precision based on the three-point positioning as claimed in claim 1, wherein a contact switch is arranged on the supporting plate, and the contact switch is used for triggering a contact signal by contacting a part.
5. The device for correcting the milling precision based on the three-point positioning as claimed in claim 1, wherein the guide rail comprises a limiting part and an extending part, and the lifting device comprises a stroke cylinder;
the extending parts are arranged above the limiting parts and are communicated with each other;
the sliding block is connected in the limiting part in a sliding manner;
the stroke cylinder is arranged at the upper end of the sliding block and is positioned in the extension part;
the contact sensor is disposed at a piston end of the stroke cylinder.
6. The device for correcting the milling precision based on the three-point positioning as claimed in claim 1, further comprising a pushing device for pushing the sliding block to move on the guide rail.
7. A method for correcting milling precision based on three-point positioning, which is characterized in that a device for correcting milling precision based on three-point positioning according to any one of claims 1-6 is used, and the method comprises the following steps:
supporting a part by the support plate and contacting a bottom of the part with the contact sensor;
acquiring bottom parameters of the part by using the contact sensor;
and adjusting the posture of the part according to the bottom parameter through an adjuster to enable the bottom parameter of the part to reach a set value.
8. The method for correcting the milling precision based on the three-point positioning as claimed in claim 7, wherein the adjusting the posture of the part according to the bottom parameter by the adjuster so that the bottom parameter of the part reaches the set value comprises:
a, step a: separating the contact sensor from the part after the bottom parameters of the part are obtained;
step b: adjusting the posture of the part according to the bottom parameters through the adjuster;
step c: contacting the contact sensor with the bottom of the part again to obtain the bottom parameter of the part;
step d: repeating the steps a to c until the bottom parameter of the part reaches a set value.
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