CN115056007A

CN115056007A - Error correction device and method for numerical control machine tool

Info

Publication number: CN115056007A
Application number: CN202210938733.4A
Authority: CN
Inventors: 范鹏; 杨柯; 喻俊; 黄磊
Original assignee: Nanjing Sichen Information Technology Co ltd
Current assignee: Nanjing Sichen Information Technology Co ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-09-16

Abstract

The invention discloses an error correction device and method for a numerical control machine, which relate to the technical field of numerical control machine processing, have the advantages of reducing the coaxiality error of relative holes of frame parts and improving the processing precision of the parts, and have the technical scheme key points that: installing a rectangular frame to be processed on a workbench of a numerical control machine tool through an error correction device, wherein a central groove is formed in the center of the workbench, and the error correction device comprises a positioning assembly; install locating component on the central groove, locating component will wait to process the center of rectangle frame and adjust to the coincidence with the workstation center afterwards, and fixed rectangle frame of waiting to process, the base setting is corresponding with the central groove position on locating component this moment, install the amesdial gauge head on the digit control machine tool main shaft, remove the digit control machine tool main shaft, make the measuring stylus of amesdial gauge head contact with the calibration ball, swivel work head, if the measuring stylus keeps motionless, then show the axis of revolution coincidence of digit control machine tool main shaft and workstation.

Description

Error correction device and method for numerical control machine tool

Technical Field

The invention relates to the technical field of numerical control machine tool machining, in particular to a device and a method for correcting errors of a numerical control machine tool.

Background

The numerical control machine tool is used for processing frame parts, mainly rectangular frames, and in order to ensure that hole positions on each side wall are coaxial, a horizontal processing method is generally adopted, namely, boring processing is completed on one side, and holes on each side surface are processed by rotating a disc. When the error of the disc or the frame is not strictly positioned at the center of the disc, a large error occurs when another side hole is machined. Sometimes, two holes cannot be bored on one side due to the limitation of the rigidity of a part or a spindle boring cutter. If the movement of the disc is added, the comprehensive error cannot meet the processing requirement.

The Chinese patent with publication number CN106002377B discloses a processing method for improving the coaxiality precision of relative holes of a part, which is characterized in that a special error correction tool is designed, the part to be processed is installed on a workbench of a numerical control machine tool through the error correction tool, the position relation between a calibration ball and a machine tool spindle and the rotary axis of the workbench is measured through a measuring head, and the reference position of the vertical processing and the horizontal processing of the part is obtained, so that the processing precision of the vertical processing and the horizontal processing is obviously improved, wherein the error correction tool comprises a calibration assembly, a pressure plate assembly, equal-height blocks and cushion blocks, the motion error of each shaft of the numerical control machine tool is eliminated to the maximum extent, the coaxiality of the relative holes of the part is only related to the alignment precision, and the precision of the part to be prepared is obviously improved. The application provides another scheme that reduces the relative hole axiality error of frame part, has improved the machining precision of part.

Disclosure of Invention

In view of the above technical shortcomings, the present invention provides an error correction device and method for a numerical control machine tool, which has the advantages of reducing the coaxiality error of the frame part relative to the hole and improving the machining precision of the part.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides an error correction method for a numerical control machine tool, which comprises the following steps:

the first step is as follows: installing a rectangular frame to be processed on a workbench of a numerical control machine tool through an error correction device, wherein a central groove is formed in the central position of the workbench, a base is arranged at the bottom of the central groove, a calibration ball extending out of the notch of the central groove is arranged on the base, and the error correction device comprises a positioning assembly;

secondly, mounting a positioning assembly on the central groove, adjusting the center of the rectangular frame to be processed and the center of the workbench to be superposed by the positioning assembly, fixing the rectangular frame to be processed, and arranging a base on the positioning assembly at a position corresponding to the central groove so that the sphere center of the calibration ball is positioned on the rotating axis of the workbench;

thirdly, mounting a dial indicator measuring head on the numerical control machine tool main shaft, moving the numerical control machine tool main shaft to enable a measuring needle of the dial indicator measuring head to be in contact with the calibration ball, rotating the workbench, and if the measuring needle is kept still, indicating that the numerical control machine tool main shaft is superposed with the rotation axis of the workbench, and entering a fourth step; otherwise, continuing to move the main shaft of the numerical control machine tool to enable the measuring needle of the measuring head to be in contact with the calibration ball, rotating the workbench until the measuring needle is kept still, and entering the fourth step;

fourthly, vertically processing the rectangular frame to be processed;

fifthly, rotating the numerical control machine tool spindle by 90 degrees, moving the numerical control machine tool spindle to enable a measuring pin of a measuring head of the dial indicator to be in contact with the calibration ball, rotating the numerical control machine tool spindle, if the measuring pin keeps still, indicating that the center of the calibration ball is located on the extension line of the numerical control machine tool spindle, and entering a sixth step; otherwise, continuing to rotate the main shaft of the numerical control machine tool to enable the measuring needle of the measuring head of the dial indicator to be in contact with the calibration ball until the measuring needle is kept still, and entering a sixth step;

and sixthly, horizontally processing the rectangular frame to be processed.

By adopting the technical scheme, the center of the rectangular frame to be processed and the center of the workbench are adjusted to be coincident by the positioning assembly, the rectangular frame to be processed is fixed, then the base is arranged at the position, corresponding to the central groove, on the positioning assembly, the center of the calibration ball is located on the rotation axis of the workbench, the center of the calibration ball is further coaxial with the rotation axis of the workbench, the position of the center line of the central groove is coaxial with the rotation axis of the workbench, the measuring needle of the measuring head of the dial gauge is contacted with the calibration ball through rotation of the numerical control machine tool spindle until the measuring needle is kept motionless, the rectangular frame is processed, the hole coaxiality error of a frame part is reduced, and the processing precision of the part is improved.

Another object of the present invention is to provide an error correction apparatus applied to the above-mentioned method for error correction of a numerically controlled machine tool, comprising two pairs of feeler levers, a circular mounting plate provided on a table, and a groove provided in the center of the top end of the mounting plate coaxially with the central groove, four sliding chutes are uniformly distributed on the outer wall of the mounting plate along the circumferential direction of the mounting plate, the four sliding chutes are opposite in pairs, the lengths of two pairs of contact rods are different, each pair of contact rods comprises two moving rods positioned on a straight line, the two moving rods have the same length, the four moving rods are respectively horizontally inserted in the four sliding grooves, one ends of the four moving rods, which are deviated from the grooves, horizontally extend out of the sliding grooves and are tightly propped against the inner wall of the rectangular frame, and the mounting plate is provided with pushing pieces used for simultaneously pushing the four moving rods to horizontally move towards the direction away from or close to each other.

Preferably, four place the board four the one side below that the carriage release lever deviates from the recess all is equipped with, four place the board all be located the below of rectangle frame, four this moment place the top of board all in the bottom contact of rectangle frame, four place all be equipped with on the board and be used for carrying out the mounting fixed to the rectangle frame.

Preferably, the mounting is including setting up the fixed plate at placing the board top, the fixed plate is located the outside of rectangle frame, threaded connection has the bolt on the fixed plate, and the one end of bolt passes the fixed plate and rotates and be connected with the clamp plate, the clamp plate horizontal slip is connected on the top of placing the board, and the clamp plate deviates from one side of fixed plate and the outer wall of rectangle frame offsets tightly.

Preferably, one side of the four moving rods departing from the groove is provided with a first anti-slip mat which is located above the placing plate and is tightly abutted to the inner wall of the rectangular frame, and one side of the pressing plate, which is close to the rectangular frame, is provided with a second protective mat which is tightly abutted to the outer wall of the rectangular frame.

Preferably, the pushing part comprises a circular pushing post and a pushing rod, the pushing post is vertically inserted into the groove, the pushing rod is vertically arranged at the bottom end of the pushing post, the bottom end of the pushing rod is located in the central groove, the diameter of the top end of the pushing post is larger than that of the bottom end of the pushing post, the groove bottoms of the four sliding grooves are communicated with the groove, one sides of the four moving rods, which are close to the groove, are respectively provided with a right-angled triangular pushing block, the inclined plane of the pushing block faces towards the pushing post and is contacted with the outer wall of the pushing post, the top groove walls of the four sliding grooves are respectively provided with a mounting groove, the top ends of the four moving rods are respectively provided with a reset plate which is located in the mounting groove, one side of the reset plate, which is far away from the groove, is respectively provided with a compression spring, one end of the compression spring, which is far away from the reset plate, is fixedly connected with one side of the groove wall of the mounting groove, and one side of the groove wall of the central groove is provided with a pulling part for pulling the pushing rod to drive the pushing post to vertically move downwards, the base is arranged at the center of the top end of the push column.

Preferably, the pulling member comprises a placing groove arranged on one side of the groove wall of the central groove and a supporting rod arranged between the groove walls on two opposite sides of the placing groove, the supporting rod is rotatably connected with a rotary drum, one side of the outer wall of the rotary drum, which is close to the push rod, is provided with two opposite swing rods, one ends of the two swing rods, which are far away from the rotary drum, extend to the outside of the placing groove and extend into the central groove and are respectively positioned on two sides of the push rod, the two opposite sides of the push rod are respectively provided with a first sliding column, one side of the two swing rods, which is close to each other, is respectively provided with a strip-shaped push groove along the length direction of the swing rod, the two first sliding columns are respectively positioned in the two push grooves, the rotary drum is provided with two opposite pulling plates, the two pulling plates are positioned above the swing rods, an included angle between the two pulling plates and the two swing rods is 90 degrees, one side of the two pulling plates, which is close to each other, is respectively provided with a strip-shaped sliding groove along the length direction of the pulling plates, the connecting groove has been seted up to the tank bottom of standing groove, the connecting groove is interior horizontal to slide and is connected with the pull rod, and the one end of pull rod extends to the standing groove in, this moment the pull rod is located the top of rotary drum, and the pull rod is located between two arm-plates, the relative both sides of pull rod all are equipped with the second traveller, two the second traveller is located two sliding tray respectively, the one end that the pull rod deviates from the standing groove extends to outside the standing groove and the swivelling joint has the screw rod, the diameter of screw rod is greater than the diameter of pull rod, and one side of workstation is equipped with the screw thread section of thick bamboo that is used for supplying the screw rod screw in, the one end of pull rod is located a screw thread section of thick bamboo.

Preferably, a first rod is horizontally arranged below the two opposite sides of the wall of the central groove, a second rod coaxial with the central groove is arranged at the top end of the first rod, the second rod is a cylinder, an insertion groove for the second rod to vertically insert is formed in the bottom end of the push rod, the insertion groove is coaxial with the central groove, and the first rod is located below the pulling piece.

Preferably, the pushing part comprises a rotary disc arranged at the top end of the mounting plate and a rotating shaft arranged at the center of the bottom end of the rotary disc, the rotating shaft is rotatably connected in the groove, the top groove walls of the four sliding grooves are communicated with the top end of the mounting plate, the top ends of the four moving rods are vertically provided with vertical rods, the rotary disc is provided with four arc-shaped grooves, the top ends of the four vertical rods respectively penetrate through the four arc-shaped grooves, the mounting plate is provided with a driving part which is located in the central groove and used for driving the rotating shaft to drive the rotary disc to rotate, and the base is arranged at the center of the top end of the rotary disc and vertically corresponds to the rotating shaft.

Preferably, the driving piece is including setting up at the pivot bottom and being located the gear of central groove and all setting up the embedded groove in the relative both sides of central groove cell wall, one of them be equipped with the cylinder in the embedded groove, and the piston rod one end level of cylinder is equipped with the horizontal plate, the horizontal plate is located one side of gear, and one side that the horizontal plate is close to the gear is equipped with the rack with gear engaged with, the length of rack is unanimous with the length of horizontal plate, the equal level of one end that cylinder was kept away from to horizontal plate, rack stretches into in another embedded groove.

The invention has the beneficial effects that: the center of the rectangular frame to be processed and the center of the workbench are adjusted to coincide by the positioning assembly, the rectangular frame to be processed is fixed, the base is arranged at a position corresponding to the central groove on the positioning assembly, the center of the calibration ball is located on the rotation axis of the workbench, the center of the calibration ball is coaxial with the rotation axis of the workbench, the position of the center line of the central groove is coaxial with the rotation axis of the workbench, the dial gauge measuring needle is contacted with the calibration ball through rotation of the numerical control machine tool spindle, and the rectangular frame is processed until the measuring needle is kept motionless, so that the hole coaxiality error of a frame part is reduced, and the processing precision of the part is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of example 2;

FIG. 2 is a schematic structural view of a tie bar according to embodiment 2;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic structural view for embodying the second lever of embodiment 2;

FIG. 5 is a schematic view of the structure embodying the arc-shaped groove of example 2;

FIG. 6 is a schematic structural view for embodying an embedded groove of example 2;

FIG. 7 is an enlarged view of the portion B of FIG. 6;

fig. 8 is a schematic structural view for embodying the rotating shaft of embodiment 2.

Description of reference numerals:

in the figure: 1. a work table; 2. a central slot; 3. a base; 4. calibrating the ball; 5. mounting a plate; 6. a groove; 7. a chute; 8. a travel bar; 9. placing the plate; 10. a fixing plate; 12. a bolt; 13. pressing a plate; 14. a first non-slip mat; 15. a second protective pad; 16. pushing the column; 17. a push rod; 18. a push block; 19. mounting grooves; 20. a reset plate; 21. a compression spring; 22. a placement groove; 23. a support bar; 24. a rotating drum; 25. a swing rod; 26. a first traveler; 27. pushing the groove; 28. pulling a plate; 29. a sliding groove; 30. a communicating groove; 31. a pull rod; 32. a second strut; 33. a screw; 34. a first lever; 35. a second lever; 36. a slot; 37. a turntable; 38. a rotating shaft; 40. a vertical rod; 41. an arc-shaped slot; 42. a gear; 43. a groove is embedded; 44. a cylinder; 45. a horizontal plate; 46. a rack; 47. a threaded barrel.

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.

Example 1: a method for error correction of a numerically controlled machine tool, comprising the steps of:

the first step is as follows: the rectangular frame to be processed is installed on a workbench 1 of a numerical control machine tool through an error correction device, a central groove 2 is formed in the center of the workbench 1, a base 3 is arranged at the bottom of the central groove 2, a calibration ball 4 extending out of a notch of the central groove 2 is arranged on the base 3, and the error correction device comprises a positioning assembly;

secondly, mounting a positioning assembly on the central groove 2, adjusting the center of the rectangular frame to be machined and the center of the workbench 1 to be superposed by the positioning assembly, fixing the rectangular frame to be machined, and arranging the base 3 on the positioning assembly at a position corresponding to the central groove 2 so that the center of the calibration ball 4 is positioned on the rotating axis of the workbench 1;

thirdly, mounting the dial gauge measuring head on the main shaft of the numerical control machine tool, moving the main shaft of the numerical control machine tool to enable a measuring needle of the dial gauge measuring head to be in contact with the calibration ball 4, rotating the workbench 1, and if the measuring needle is kept still, indicating that the main shaft of the numerical control machine tool is superposed with the rotary axis of the workbench 1, and entering a fourth step; otherwise, continuing to move the main shaft of the numerical control machine tool to enable the measuring needle of the measuring head to be in contact with the calibration ball 4, rotating the workbench 1 until the measuring needle is kept still, and entering the fourth step;

fourthly, vertically processing the rectangular frame to be processed;

fifthly, rotating the main shaft of the numerical control machine tool by 90 degrees, moving the main shaft of the numerical control machine tool, enabling a measuring needle of a measuring head of a dial indicator to be in contact with the calibration ball 4, rotating the main shaft of the numerical control machine tool, if the measuring needle is kept still, indicating that the center of the calibration ball 4 is located on an extension line of the main shaft of the numerical control machine tool, and entering a sixth step; otherwise, continuing to rotate the main shaft of the numerical control machine tool to enable the measuring needle of the measuring head of the dial indicator to be in contact with the calibration ball 4 until the measuring needle keeps still, and entering a sixth step;

sixthly, horizontally processing the rectangular frame to be processed;

the center of the rectangular frame to be machined and the center of the workbench 1 are adjusted to be coincident by the positioning assembly, the rectangular frame to be machined is fixed, the base 3 is arranged at a position corresponding to the central groove 2 on the positioning assembly, the center of the calibration ball 4 is located on the rotating axis of the workbench 1, the center of the calibration ball 4 is further coaxial with the rotating axis of the workbench 1, the position of the central groove 2 is coaxial with the rotating axis of the workbench 1, the measuring needle of the measuring head of the dial gauge is in contact with the calibration ball 4 through the rotation of the numerical control machine tool spindle until the measuring needle keeps stationary, the rectangular frame is machined, the coaxiality error of the relative holes of frame parts is reduced, and the machining precision of the parts is improved.

Example 2: an error correction device applied to the error correction method of the numerical control machine tool in the embodiment 1 is shown in fig. 1, and comprises two pairs of touch rods, a circular mounting plate 5 arranged on a workbench 1, and a groove 6 arranged in the center of the top end of the mounting plate 5 and coaxial with a central groove 2, wherein four sliding grooves 7 are uniformly distributed on the outer wall of the mounting plate 5 along the circumferential direction of the mounting plate 5, the four sliding grooves 7 are opposite to each other in pairs, the lengths of the two pairs of touch rods are different, each pair of touch rods comprises two moving rods 8 positioned on a straight line, the lengths of the two moving rods 8 are the same, the four moving rods 8 are horizontally inserted into the four sliding grooves 7 respectively, one ends of the four moving rods 8 departing from the groove 6 horizontally extend out of the sliding grooves 7 and are abutted against the inner wall of a rectangular frame, a pushing member for pushing the four moving rods 8 to move horizontally in the direction away from or close to each other is arranged on the mounting plate 5, the purpose of this setting lies in that the user places the rectangle frame on workstation 1, mounting panel 5 is located the rectangle frame, promote four carriage release 8 simultaneously to the direction horizontal migration who keeps away from each other through the impeller, recess 6 is kept away from to four carriage release 8 this moment, four carriage release 8 roll-off from spout 7 gradually, one side that deviates from recess 6 until four carriage release 8 all offsets tightly with the inner wall of rectangle frame, the center of rectangle frame coincides with workstation 1 center this moment, support the rectangle frame tightly through four carriage release 8, can be in the center of rectangle frame and workstation 1 center coincidence while and fixed rectangle frame, and is simple to use and convenient.

As shown in fig. 8, one side below that four movable rods 8 deviate from recess 6 all is equipped with places board 9, four place board 9 all are located the below of rectangle frame, four top of placing board 9 all are in the bottom contact of rectangle frame this moment, four are placed and all are equipped with the mounting that is used for fixing the rectangle frame on the board 9, the aim at of this setting is after four movable rods 8 support tight rectangle frame, the user fixes the rectangle frame once more through the mounting of placing on board 9, can improve the rectangle frame steadiness when adding man-hour this moment, convenience simple to use.

As shown in fig. 8, the fixing member includes a fixing plate 10 disposed on the top end of the placing plate 9, the fixing plate 10 is disposed on the outer side of the rectangular frame, a bolt 12 is connected to the fixing plate 10 through a thread, one end of the bolt 12 penetrates through the fixing plate 10 and is rotatably connected with a pressing plate 13, the pressing plate 13 is horizontally connected to the top end of the placing plate 9 in a sliding manner, one side of the pressing plate 13 departing from the fixing plate 10 abuts against the outer wall of the rectangular frame, the user who aims at the setting can push the pressing plate 13 to move horizontally in the direction away from the fixing plate 10 by one end of the bolt 12 through rotating the bolt 12, until one side of the pressing plate 13 departing from the fixing plate 10 abuts against the outer wall of the rectangular frame, and at the moment, the rectangular frame can be fixed, and the use is simple and convenient.

As shown in fig. 8, one side of each of the four moving rods 8 departing from the corresponding groove 6 is provided with a first anti-slip mat 14 which is located above the placing plate 9 and tightly abutted to the inner wall of the rectangular frame, one side of the pressing plate 13 close to the rectangular frame is provided with a second anti-slip mat 15 tightly abutted to the outer wall of the rectangular frame, and the situation that the moving rods 8 and the pressing plate 13 are tightly abutted to the rectangular frame and are damaged can be reduced through the first anti-slip mats 14 and the second anti-slip mats 15.

As shown in fig. 2 and 3, the pushing member includes a circular pushing post 16 and a pushing rod 17, the pushing post 16 is vertically inserted into the groove 6, the pushing rod 17 is vertically disposed at the bottom end of the pushing post 16, at this time, the bottom end of the pushing rod 17 is located in the central groove 2, the diameter of the top end of the pushing post 16 is greater than the diameter of the bottom end of the pushing post 16, the bottoms of the four sliding grooves 7 are all communicated with the groove 6, one side of the four moving rods 8 close to the groove 6 is all provided with a right triangle pushing block 18, the inclined plane of the pushing block 18 faces the pushing post 16 and contacts with the outer wall of the pushing post 16, the top end groove walls of the four sliding grooves 7 are all provided with mounting grooves 19, the top ends of the four moving rods 8 are all provided with reset plates 20 located in the mounting grooves 19, one side of the reset plates 20 away from the groove 6 is all provided with compression springs 21, one end of the compression springs 21 far away from the reset plates 20 is fixedly connected with one side of the groove walls of the mounting grooves 19, one side of the central groove 2 is provided with a pulling member for pulling the pushing rod 17 to drive the pushing post 16 to vertically move downwards, at the moment, the base 3 is arranged at the center of the top end of the push post 16, and the purpose of the arrangement is that when the four moving rods 8 need to be pushed to move horizontally in a direction away from each other, a user only needs to pull the push rod 17 through the pulling piece to drive the push post 16 to move vertically downwards, at the moment, because the diameter of the top end of the push post 16 is larger than the diameter of the bottom end of the push post 16, the inclined surfaces of the push blocks 18 on the four moving rods 8 face the push post 16 and are in contact with the outer wall of the push post 16, when the push rod 17 is pulled to drive the push post 16 to move vertically downwards, the four moving rods 8 can be simultaneously pushed to move horizontally in a direction away from each other through the matching of the push post 16 and the four push blocks 18, at the moment, the push blocks 18 are gradually pushed into the sliding grooves 7 by the push post 16, the moving rod 8 drives the reset plate 20 to move in a direction away from the grooves 6, the compression springs 21 are compressed, at the moment, because of the compression springs 21, when the pulling piece pulls the push rod 17 to drive the push post 16 to move vertically upwards, the compressed compression spring 21 will push the reset plate 20 to drive the moving rod 8 to move towards the direction close to the groove 6, so that the inclined surface of the push block 18 is always in contact with the outer wall of the push column 16 until the moving rod 8 moves to the initial position, and the use is simple and convenient.

Referring to fig. 2 and 3, the pulling member includes a placement groove 22 disposed on one side of the groove wall of the central groove 2 and a support rod 23 disposed between the two opposite groove walls of the placement groove 22, and a rotary drum 24 is rotatably connected to the support rod 23, two opposite swing rods 25 are disposed on one side of the outer wall of the rotary drum 24 close to the push rod 17, and one ends of the two swing rods 25 far from the rotary drum 24 extend to the placement groove 22 and extend into the central groove 2 and are respectively located on two sides of the push rod 17, first sliding columns 26 are disposed on two opposite sides of the push rod 17, elongated pushing grooves 27 are disposed on one sides of the two swing rods 25 close to each other along the length direction of the swing rods 25, the two first sliding columns 26 are respectively located in the two pushing grooves 27, two opposite pulling plates 28 are disposed on the rotary drum 24, the two pulling plates 28 are located above the swing rods 25, an included angle between the two pulling plates 28 and the two swing rods 25 is 90 degrees, elongated sliding grooves 29 are disposed on one sides of the two pulling plates 28 close to each other along the length direction of the pulling plates 28, a communicating groove 30 is formed at the bottom of the placing groove 22, a pull rod 31 is connected to the communicating groove 30 in a horizontally moving manner, one end of the pull rod 31 extends into the placing groove 22, the pull rod 31 is located above the rotary drum 24 at the moment, the pull rod 31 is located between the two pull plates 28, second sliding columns 32 are arranged on two opposite sides of the pull rod 31, the two second sliding columns 32 are respectively located in the two sliding grooves 29, one end of the pull rod 31, which is far away from the placing groove 22, extends out of the placing groove 22 and is rotatably connected with a screw 33, the diameter of the screw 33 is larger than that of the pull rod 31, a threaded cylinder 47 for screwing the screw 33 is arranged on one side of the workbench 1, one end of the pull rod 31 is located in the threaded cylinder 47, the arrangement aims to enable a user to screw the screw 33 to be screwed into the threaded cylinder 47 by rotating the screw 33, at the moment, the screw 33 can push the pull rod 31 to move horizontally towards the placing groove 22, at the moment, the pull rod 31 can enable the pull plates 28 to drive the rotary drum 24 to be arranged on the support rod 23 through the cooperation of the second sliding columns 32 and the sliding grooves 29 Go up and rotate, second traveller 32 moves along the length direction of sliding tray 29 in sliding tray 29 this moment, arm-tie 28 rotates along the axis of rotation of rotary drum 24 to the direction of keeping away from standing groove 22 tank bottom, rotary drum 24 then can drive pendulum rod 25 along the axis of rotation of rotary drum 24 to the direction of keeping away from recess 6 this moment, can stimulate push rod 17 through the cooperation of pushing away groove 27 on two pendulum rods 25 and the first traveller 26 on the push rod 17 this moment and drive and push away the vertical downstream of post 16, first traveller 26 moves along the length direction of pushing away groove 27 this moment, through simple to use convenience.

As shown in fig. 3 and 4, a first rod 34 is horizontally arranged below the two opposite sides of the groove wall of the central groove 2, a second rod 35 coaxial with the central groove 2 is arranged at the top end of the first rod 34, the second rod 35 is a cylinder, a slot 36 for vertically inserting the second rod 35 is arranged at the bottom end of the push rod 17, the slot 36 is coaxial with the central groove 2, the first rod 34 is located below the pulling part, the arrangement aims to ensure that the second rod 35 can be gradually inserted into the slot 36 when the push rod 17 vertically moves downwards, the top end of the second rod 35 is always located in the slot 36, and the stability of the push rod 17 when vertically moving downwards can be improved through the matching of the second rod 35 and the slot 36, so that the use is simple and convenient.

As shown in fig. 5 and 8, or the pushing member includes a rotating disc 37 disposed at the top end of the mounting plate 5 and a rotating shaft 38 disposed at the bottom center of the rotating disc 37, the rotating shaft 38 is rotatably connected in the groove 6, the top end groove walls of the four sliding grooves 7 are all communicated with the top end of the mounting plate 5, the top ends of the four moving rods 8 are all vertically provided with vertical rods 40, the rotating disc 37 is provided with four arc-shaped grooves 41, the top ends of the four vertical rods 40 respectively pass through the four arc-shaped grooves 41, the mounting plate 5 is provided with a driving member located in the central groove 2 and used for driving the rotating shaft 38 to drive the rotating disc 37 to rotate, at this time, the base 3 is disposed at the top center of the rotating disc 37 and vertically corresponds to the rotating shaft 38, the four arc-shaped grooves 41 are uniformly distributed along the circumferential direction of the rotating disc 37, a user drives the rotating shaft 38 to rotate the rotating disc 37 through the driving member, at this time, because the vertical rods 40 on the four moving rods 8 respectively pass through the four arc-shaped grooves 41, therefore, when the rotating disc 37 rotates, the four vertical rods 40 can be pushed simultaneously through the four arc-shaped slots 41 to drive the movable rod 8 to move horizontally in the direction away from each other, and the use is simple and convenient.

Referring to fig. 6 and 7, the driving member includes a gear 42 disposed at the bottom end of the rotating shaft 38 and located in the central groove 2, and two insertion grooves 43 disposed at two opposite sides of the groove wall of the central groove 2, wherein an air cylinder 44 is disposed in one insertion groove 43, and one end of a piston rod of the air cylinder 44 is horizontally disposed with a horizontal plate 45, the horizontal plate 45 is disposed at one side of the gear 42, and one side of the horizontal plate 45 close to the gear 42 is disposed with a rack 46 engaged with the gear 42, the length of the rack 46 is identical to the length of the horizontal plate 45, and the ends of the horizontal plate 45 and the rack 46 far from the air cylinder 44 are horizontally extended into the other insertion groove 43, which is configured to enable a user to open the air cylinder 44, and at this time, the piston rod of the air cylinder 44 will push the horizontal plate 45 to drive the rack 46 to horizontally move, and at this time, the rack 46 is engaged with the gear 42, so that when the rack 46 is driven by the horizontal plate 45 to horizontally move, the gear 42 will be driven to rotate, at this time, the gear 42 will drive the rotating shaft 38 to rotate, and the use is simple and convenient.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for error correction of a numerically controlled machine tool, characterized by comprising the steps of:

the first step is as follows: the rectangular frame to be processed is installed on a workbench (1) of a numerical control machine tool through an error correction device, a central groove (2) is formed in the center of the workbench (1), a base (3) is arranged at the bottom of the central groove (2), a calibration ball (4) extending out of the notch of the central groove (2) is arranged on the base (3), and the error correction device comprises a positioning assembly;

secondly, mounting a positioning assembly on the central groove (2), adjusting the center of the rectangular frame to be processed and the center of the workbench (1) to be superposed by the positioning assembly, fixing the rectangular frame to be processed, and arranging a base (3) on the positioning assembly at a position corresponding to the central groove (2) so that the center of the calibration ball (4) is positioned on a rotating axis of the workbench (1);

thirdly, mounting the dial indicator measuring head on the numerical control machine tool main shaft, moving the numerical control machine tool main shaft to enable a measuring needle of the dial indicator measuring head to be in contact with the calibration ball (4), rotating the workbench (1), and if the measuring needle is kept still, indicating that the numerical control machine tool main shaft is superposed with the rotary axis of the workbench (1), and entering a fourth step; otherwise, continuing to move the main shaft of the numerical control machine tool to enable the measuring needle of the measuring head to be in contact with the calibration ball (4), rotating the workbench (1) until the measuring needle is kept still, and entering the fourth step;

fourthly, vertically processing the rectangular frame to be processed;

fifthly, rotating the main shaft of the numerical control machine tool by 90 degrees, moving the main shaft of the numerical control machine tool, enabling a measuring needle of a measuring head of a dial indicator to be in contact with the calibration ball (4), rotating the main shaft of the numerical control machine tool, if the measuring needle is kept still, indicating that the center of the calibration ball (4) is positioned on the extension line of the main shaft of the numerical control machine tool, and entering a sixth step; otherwise, continuing to rotate the main shaft of the numerical control machine tool to enable the measuring needle of the measuring head of the dial indicator to be in contact with the calibration ball (4) until the measuring needle is kept still, and entering a sixth step;

and sixthly, horizontally processing the rectangular frame to be processed.

2. An error correction device applied to the error correction method of the numerical control machine tool according to the claim 1, characterized in that it comprises two pairs of touch rods, a circular mounting plate (5) arranged on the working table (1) and a groove (6) arranged at the center of the top end of the mounting plate (5) and coaxial with the central groove (2), four sliding grooves (7) are uniformly distributed on the outer wall of the mounting plate (5) along the circumferential direction of the mounting plate (5), the four sliding grooves (7) are opposite to each other in pairs, the length of the two pairs of touch rods is different, each pair of touch rods comprises two moving rods (8) positioned on a straight line, the length of the two moving rods (8) is the same, the four moving rods (8) are respectively and horizontally inserted into the four sliding grooves (7), one ends of the four moving rods (8) deviating from the groove (6) horizontally extend out of the sliding grooves (7) and tightly abut against the inner wall of the rectangular frame, the mounting plate (5) is provided with a pushing piece which is used for pushing the four moving rods (8) to move horizontally in the direction away from or close to each other.

3. The device for error correction of numerically controlled machine tool according to claim 2, characterized in that, a placing plate (9) is provided under one side of each of four said moving rods (8) away from the groove (6), four said placing plates (9) are provided under the rectangular frame, and at this time, the top ends of four said placing plates (9) are all in contact with the bottom end of the rectangular frame, and a fixing member for fixing the rectangular frame is provided on each of four said placing plates (9).

4. The device for error correction of the numerical control machine according to claim 3, characterized in that the fixing member comprises a fixing plate (10) disposed at the top end of the placing plate (9), the fixing plate (10) is located at the outer side of the rectangular frame, a bolt (12) is connected to the fixing plate (10) in a threaded manner, one end of the bolt (12) penetrates through the fixing plate (10) and is rotatably connected with a pressing plate (13), the pressing plate (13) is connected to the top end of the placing plate (9) in a horizontal sliding manner, and one side of the pressing plate (13) facing away from the fixing plate (10) abuts against the outer wall of the rectangular frame.

5. The device for error correction of numerically controlled machine tool according to claim 4, characterized in that the side of said four moving rods (8) facing away from the recess (6) is provided with a first anti-slip mat (14) which is located above the placing plate (9) and abuts against the inner wall of the rectangular frame, and the side of said pressing plate (13) adjacent to the rectangular frame is provided with a second protective mat (15) which abuts against the outer wall of the rectangular frame.

6. The device for error correction of numerically controlled machine tool according to claim 2, characterized in that the pushing member comprises a circular pushing post (16) and a pushing rod (17), the pushing post (16) is vertically inserted into the groove (6), the pushing rod (17) is vertically arranged at the bottom end of the pushing post (16), the bottom end of the pushing rod (17) is located in the central groove (2), the diameter of the top end of the pushing post (16) is larger than that of the bottom end of the pushing post (16), the bottoms of the four sliding grooves (7) are all communicated with the groove (6), one side of the four moving rods (8) close to the groove (6) is provided with a right triangle pushing block (18), the inclined plane of the pushing block (18) faces the pushing post (16) and contacts with the outer wall of the pushing post (16), the tops of the four sliding grooves (7) are provided with mounting grooves (19), the tops of the four moving rods (8) are provided with reset plates (20) located in the mounting grooves (19), reset plate (20) and deviate from one side of recess (6) and all be equipped with compression spring (21), and compression spring (21) keep away from the one end of resetting plate (20) and the cell wall one side fixed connection of mounting groove (19), cell wall one side of center slot (2) is equipped with and is used for pulling push rod (17) and drives the pulling piece that pushes away the vertical downstream of post (16), this moment base (3) set up at the top center that pushes away post (16).

7. The device for error correction of numerical control machine tool according to claim 6, wherein the pulling member comprises a placing groove (22) disposed on one side of the groove wall of the central groove (2) and a supporting rod (23) disposed between the two opposite groove walls of the placing groove (22), and a rotary drum (24) is rotatably connected to the supporting rod (23), two opposite swing rods (25) are disposed on one side of the outer wall of the rotary drum (24) close to the push rod (17), and one ends of the two swing rods (25) far away from the rotary drum (24) extend out of the placing groove (22) into the central groove (2) and are respectively located on two sides of the push rod (17), first sliding columns (26) are disposed on two opposite sides of the push rod (17), an elongated push groove (27) is disposed on one side of the two swing rods (25) close to each other along the length direction of the swing rod (25), and the two first sliding columns (26) are respectively located in the two push grooves (27), be equipped with two relative arm-tie (28) on rotary drum (24), and two arm-tie (28) are located the top of pendulum rod (25), and the contained angle between two arm-tie (28) and two pendulum rods (25) is 90 degrees, two rectangular shape sliding tray (29) have all been seted up along the length direction of arm-tie (28) to one side that arm-tie (28) are close to each other, intercommunication groove (30) have been seted up to the tank bottom of standing groove (22), the smooth migration of water is connected with pull rod (31) in intercommunication groove (30), and the one end of pull rod (31) extends to in standing groove (22), this moment pull rod (31) are located the top of rotary drum (24), and pull rod (31) are located between two arm-tie (28), the relative both sides of pull rod (31) all are equipped with second traveller (32), two second traveller (32) are located two sliding tray (29) respectively, the one end that pull rod (31) deviate from standing groove (22) extends to and is connected with outside standing groove (22) and rotates, and be connected with The diameter of the screw rod (33) is larger than that of the pull rod (31), a threaded cylinder (47) for screwing the screw rod (33) into is arranged on one side of the workbench (1), and one end of the pull rod (31) is located in the threaded cylinder (47).

8. An error correction device for numerically controlled machine tool according to claim 6, characterized in that a first rod (34) is horizontally provided below between two opposite sides of the wall of the central groove (2), and a second rod (35) coaxial with the central groove (2) is provided at the top end of the first rod (34), the second rod (35) is a cylinder, a slot (36) for vertically inserting the second rod (35) is provided at the bottom end of the push rod (17), the slot (36) is coaxial with the central groove (2), and the first rod (34) is located below the pulling member.

9. The apparatus for error correction of a numerical control machine tool according to claim 2, the pushing piece comprises a rotary disc (37) arranged at the top end of the mounting plate (5) and a rotating shaft (38) arranged at the center of the bottom end of the rotary disc (37), the rotating shaft (38) is rotatably connected in the groove (6), the top groove walls of the four sliding grooves (7) are communicated with the top end of the mounting plate (5), the top ends of the four moving rods (8) are vertically provided with vertical rods (40), four arc-shaped grooves (41) are formed in the turntable (37), the top ends of the four vertical rods (40) respectively penetrate through the four arc-shaped grooves (41), be equipped with on mounting panel (5) and be located central groove (2) and be used for driving pivot (38) and drive carousel (37) pivoted driving piece, this moment base (3) set up at the top center of carousel (37) and correspond from top to bottom with pivot (38).

10. The device for error correction of the numerical control machine according to claim 9, wherein the driving member comprises a gear (42) disposed at the bottom end of the rotating shaft (38) and located in the central groove (2), and embedded grooves (43) disposed at two opposite sides of the groove wall of the central groove (2), wherein an air cylinder (44) is disposed in one of the embedded grooves (43), a horizontal plate (45) is horizontally disposed at one end of a piston rod of the air cylinder (44), the horizontal plate (45) is located at one side of the gear (42), a rack (46) engaged with the gear (42) is disposed at one side of the horizontal plate (45) close to the gear (42), the length of the rack (46) is the same as that of the horizontal plate (45), and one ends of the rack (46) far away from the air cylinder (44) horizontally extend into the other embedded groove (43).