CN114406803A - Zero point recovery and calibration device for machine tool of machining center and using method of zero point recovery and calibration device - Google Patents
Zero point recovery and calibration device for machine tool of machining center and using method of zero point recovery and calibration device Download PDFInfo
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- CN114406803A CN114406803A CN202210048599.0A CN202210048599A CN114406803A CN 114406803 A CN114406803 A CN 114406803A CN 202210048599 A CN202210048599 A CN 202210048599A CN 114406803 A CN114406803 A CN 114406803A
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- 229910000831 Steel Inorganic materials 0.000 claims description 23
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- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 5
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Abstract
The invention discloses a zero point recovery and calibration device of a machining center machine tool and a use method thereof, wherein the device comprises a special checking fixture, a mandrel, a magnetic gauge stand and a dial gauge head; the special checking fixture is arranged at any angular point of a machine tool workbench of the machining center, the mandrel is arranged on a main shaft of the machine tool of the machining center, the magnetic gauge stand is arranged on the mandrel, and the dial gauge head is arranged on the magnetic gauge stand; the special checking fixture comprises a checking fixture body, a positioning bottom surface and a cylindrical pin are arranged at the bottom of the checking fixture body, a ball head screw is mounted at the bottom of the side surface of the checking fixture body, and the special checking fixture is positioned with a machine tool workbench of a machining center through the positioning bottom surface, the cylindrical pin and the ball head screw; the checking fixture body is provided with a vertical position mark hole in a penetrating manner along the vertical direction, the checking fixture body is provided with a horizontal position mark hole along the horizontal direction, and the horizontal position mark hole is communicated with the vertical position mark hole.
Description
Technical Field
The invention belongs to the technical field of numerical control machines, and relates to a zero point recovery and calibration device for a machining center machine tool and a using method thereof, which are used for recovering a zero point of a machining center which is not provided with a return-to-zero collision block and uses an absolute encoder.
Background
For zero point recovery of a machining center, the following three existing methods are available, taking a FANUC system absolute encoder machine tool as an example, machine tool zero point information is characterized by position data in a non-powered photoelectric encoder and a corresponding memory unit:
1. mechanical reference point returning method: the method is characterized in that a zero-returning collision block and a travel switch are installed on a numerical control machining center, a main shaft of a machine tool returns to a reference point of the machine tool through the operation of returning the reference point of the machine tool, and the machine tool coordinate system is restored by matching with the memory of relevant pulse position information in a memory. The method has simple process and reliable functions, but the design of a new machining center needs to save cost and simplify the structure, and the absolute encoder is adopted, so that the numerical control machine tool does not need to return to zero (return to a reference point) in most cases, and a plurality of devices do not keep related structures, namely do not have the functions;
2. tool changing point-stroke recovery method: the method comprises the following steps of aligning the end part of a main shaft with a tool changing position of a tool magazine by using a plug gauge and an adjusting tool shank through a manual machine tool, recording the current Z position, and comparing the current Z position with a Z coordinate factory setting value to obtain the Z coordinate position of the zero point of the machine tool; x coordinate position determination: the manual machine tool is used for aligning and determining a center plane of a T-shaped groove in the center of the workbench as a reference through a dial indicator and a drill chuck handle, and comparing the center plane with a set value of a factory X coordinate to obtain an X coordinate position of a zero point of the machine tool; and (3) determining the coordinate position: and the manual machine tool runs the equipment to positive and negative hard limit positions, and the Y coordinate position of the zero point of the machine tool is approximately determined by calculating through a machine tool nominal stroke center-sharing method. The method has higher requirement on Z-axis tool changing position alignment operation skill, generally needs after-sale service personnel of a machine tool manufacturer to finish the operation, and has longer time consumption, and the Y-axis position determination error of the method is larger and only can play a role of avoiding over travel. If the machine tool application enterprise uses the zero point of the original machine tool as the reference in the previous clamp setting process, the method needs to be aligned and set again after the zero point is recovered.
3. The method for preprocessing the positioning hole on the workbench comprises the following steps: the method comprises the steps of selecting a position on a machine tool workbench before the machine tool is used after delivery inspection, pre-processing a positioning hole and a positioning surface (a counter bore step surface), recording the mechanical coordinate positions of X and Y of the center of the positioning hole, determining the position of a Z-direction machine tool coordinate system by the counter bore step surface and a mandrel embedded with a steel ball on the end surface through a plug gauge, and protecting the hole and the plane of a positioning reference by embedding a non-metal insert in the working process. When the machine tool coordinate system needs to be recovered, the non-metal insert is taken out firstly, the center position of the positioning hole is manually determined in a hole scanning mode through a dial indicator, and the XY coordinate position of the zero point of the machine tool is recovered according to the center position. And then the stepped surface of the counter bore is detected through the mandrel with the end surface embedded with the steel ball and the plug gauge, so that the zero point of the Z coordinate is recovered. The method has higher recovery precision, is easy to realize the function of automatically recovering the zero point through the probe, but needs to punch holes on the working table of a new machine tool, and has negative effects on the precision of equipment and the strength of the working table.
CN105415095A discloses a numerical control machining origin rapid positioning instrument, wherein an upper end conical seat is arranged at the upper end of a fixed rod, the lower end of the fixed rod is connected with a movable rod through a universal connecting piece, and a lower end conical seat is arranged at the bottom of the movable rod; a conductive disc is arranged in the fixed rod, an X-axis conductor and a Y-axis conductor on the bottom surface of the conductive disc are perpendicular, an intersection point is set as an original point, and the original point is positioned on a vertical axis of the upper-end conical seat; the movable rod is internally provided with a conductive probe, the upper end of the conductive probe penetrates through the universal connecting piece to be contacted with the bottom surface of the conductive disc, the axis of the conductive probe in a vertical state is superposed with the axis of the upper end conical seat, and the conductive probe, the X-axis conductor, the Y-axis conductor and the original point form a conductive loop respectively and are displayed through the display lamp. The device utilizes the conductive loops formed by the conductive probe, the X-axis conductor, the Y-axis conductor and the origin respectively to determine whether the position is the origin position or not through the display of the corresponding display lamp.
CN105598742A discloses a method for setting a workpiece machining origin, which belongs to the technical field of workpiece machining methods, wherein a hole I and a hole II are at least arranged on a workpiece, and the axial directions of the hole I and the hole II are consistent, and the method comprises the following steps: mounting a workpiece on a machine tool; on the machine tool, a measuring tool is adopted to find the coordinate value of the center of the hole I, and the original point of the workpiece is preliminarily determined; measuring the diameter D1 of the hole I; trial machining a hole II, and measuring the diameter D2 of the hole II; measuring the distances X1 and Y1 from the hole II bus to the hole I bus on the machine tool; calculating the actual coordinates X, Y of the hole II according to X1, Y1, D1 and D2; calculating the difference value between the actual coordinate value X, Y and the program coordinate value, and correcting the workpiece origin; the trial process and measurement steps were repeated until the difference was within 0.01 mm. The method needs to be provided with at least two holes on a workpiece to be processed, needs to roughly measure the space by a contact measuring tool, and repeatedly tries to cut the two holes until the deviation between the measured value and the input value of the equipment processing program is within 0.01mm, so that the central hole can be determined to be the origin of a coordinate system.
CN109282772A discloses a method for measuring a cylinder head blank and determining a workpiece coordinate system, which comprises the following steps: the positions of the cylinder cover blank in the Z direction, the X direction and the Y direction are limited through a positioning surface, a first limiting point and a second limiting point respectively; selecting a plurality of check points on the adjusting surface of the cylinder cover blank, and detecting the actual distance from each check point to the positioning surface by using a measuring head; judging whether the difference value of each actual distance and the corresponding theoretical distance is within a first preset range or not; if so, selecting a reference point on the adjusting surface, determining a Z value zero point, an X value zero point and a Y value zero point by combining the positioning surface, the first limit point, the second limit point and the reference point, further determining an origin point and establishing a workpiece coordinate system. According to the method, a machine tool measuring head is used for measuring whether the distances from a plurality of check points to a positioning surface are within a preset range, if the distances are not within the preset range, kicking is needed, if a reference point is needed to be selected on an adjusting surface within the range, and the position of the origin of a coordinate system is determined through the distances from limiting points of a workpiece X, Y, Z in three directions to the reference point.
Disclosure of Invention
The invention provides a machining center machine tool zero point recovery and calibration device and a using method thereof, aiming at solving the problems of complex operation, high cost, low calibration recovery precision and the like of a machining center zero point recovery and calibration method commonly used in the prior art.
The purpose of the invention is realized by the following technical scheme, which is combined with the attached drawings:
a zero point recovery and calibration device for a machine tool of a machining center is characterized by comprising a special checking fixture 5, a mandrel 2, a magnetic gauge stand 3 and a dial gauge head 4; the special checking fixture 5 is arranged at any angular point of a machine tool workbench of the machining center, the mandrel 2 is arranged on a main shaft of the machine tool of the machining center, the magnetic gauge stand 3 is arranged on the mandrel 2, and the dial gauge head 4 is arranged on the magnetic gauge stand 3; the special checking fixture 5 comprises a checking fixture body 11, a positioning bottom surface 19 and a cylindrical pin are arranged at the bottom of the checking fixture body 11, a ball head screw 12 is mounted at the bottom of the side surface of the checking fixture body 11, and the special checking fixture 5 and a machining center machine tool workbench are positioned through the positioning bottom surface 19, the cylindrical pin 14 and the ball head screw 12; the checking fixture body 11 is provided with a vertical position marking hole 16 in a penetrating manner along the vertical direction, the checking fixture body 11 is provided with a horizontal position marking hole 18 along the horizontal direction, and the horizontal position marking hole 18 is communicated with the vertical position marking hole 16.
Further, four bosses are arranged at the bottom of the checking fixture body 11, and the bottom surfaces of the bosses are flush with each other to form a positioning bottom surface 19.
Further, a flange extends from the side surface of the checking fixture body 11 to the bottom surface, a threaded hole is formed in the flange, and a ball head screw 12 is installed on the flange through the threaded hole and fixed through a nut 13.
Further, a side wall of the checking fixture body 11 is provided with a vertical verification plane 17, and the top surface of the checking fixture body 11 is provided with a horizontal verification plane.
Furthermore, a phi 6 steel ball is bonded in a central hole at the axial end of the mandrel 2 by using viscous oil.
Further, the dial indicator head 4 is used for contacting with the inner side hole wall of the vertical position marking hole 16 or the horizontal position marking hole 18 of the special checking fixture 4.
Furthermore, the positioning bottom surface 19 of the special checking fixture 5 is in contact with the working table surface of the machine tool of the machining center, so that three degrees of freedom between the special checking fixture and the working table are limited; two cylindrical pins 14 of the special checking fixture 5 are in contact with the side wall of a T-shaped groove of a machine tool workbench of the machining center, so that two degrees of freedom between the special checking fixture and the workbench are limited; the ball screw 12 of the special checking fixture 5 is in contact with the side surface of the machine tool workbench of the machining center, and the last degree of freedom between the special checking fixture and the workbench is limited.
The invention also provides a use method of the zero point recovery and calibration device of the machining center machine tool, which comprises the following steps:
step one, placing a special checking fixture:
after the machine tool of the new vertical machining center is checked and accepted, the special checking fixture is placed at any angular point position on the workbench of the machining center machine tool, the special checking fixture 5 is positioned with the workbench of the machining center machine tool through the positioning bottom surface 19, the cylindrical pin 14 and the ball head screw 12, and the only position of the checking fixture on the workbench of the machine tool is determined;
step two, detecting the original X value and the original Y value of a machine tool coordinate system:
installing a mandrel on a main shaft of a machine tool of a machining center, and installing a magnetic gauge stand on the mandrel; enabling the dial indicator head to enter a vertical position marking hole of the special checking fixture and contact with the hole wall, and aligning the axis of the vertical position marking hole to coincide with the axis of the machine tool spindle; recording an X coordinate display value, a Y coordinate display value and a corresponding machine tool number in a current machine tool coordinate system;
step three, detecting an original Z value of a machine tool coordinate system, and recording machine tool coordinate position information:
a phi 6 steel ball is bonded in a central hole at the axial end of the mandrel by using viscous oil, and part of the steel ball is exposed out of the central hole; enabling the main shaft of the machine tool of the machining center to approach a horizontal verification plane of the special checking fixture along the Z coordinate direction, determining the distance between the steel ball and the horizontal verification plane, determining the Z coordinate position of the horizontal verification plane in the machine tool coordinate system, recording the Z coordinate display value in the current machine tool coordinate system, and archiving the X coordinate display value, the Y coordinate display value and the machine tool number which are obtained in the second step;
fourthly, machine tool zero point recovery and calibration of the machining center:
4.1) when the origin of the machine tool coordinate system is lost in the using process of the machining center, calculating the X coordinate display value and the Y coordinate display value of the current machine tool coordinate system on the machining center through the operation of the first step and the second step, and respectively recording the algebraic differences of the X coordinate value and the Y coordinate value in the archived data as X1 and Y1; calculating the Z coordinate value algebraic difference between the Z coordinate display value of the machine tool coordinate system and the Z coordinate value in the archived data as Z1 through the third operation;
4.2) enabling the machine tool to reach the zero point of the current coordinate;
bringing the machine tool to the (X1, Y1, Z1) position; and marking the machine tool zero point preset parameter as 1, and restarting the machine tool system to finish the machine tool zero point recovery.
Alternatively, the invention provides a use method of a zero point recovery and calibration device of a machining center machine tool, which comprises the following steps:
step one, placing a special checking fixture:
after the machine tool of the new horizontal machining center is checked and accepted, the special checking fixture is placed at any angular point position on the worktable of the machining center, the special checking fixture 5 is positioned with the worktable of the machining center through the positioning bottom surface 19, the cylindrical pin 14 and the ball head screw 12, and the only position of the checking fixture on the worktable of the machine tool is determined;
step two, detecting the original X value and the original Y value of a machine tool coordinate system:
installing a mandrel on a main shaft of a machine tool of a machining center, and installing a magnetic gauge stand on the mandrel; enabling the dial indicator head to enter a horizontal position mark hole of the special checking fixture and contact the hole wall, and aligning the axis of the horizontal position mark hole to coincide with the axis of the machine tool spindle; recording an X coordinate display value, a Y coordinate display value and a corresponding machine tool number in a current machine tool coordinate system;
step three, detecting an original Z value of a machine tool coordinate system, and recording machine tool coordinate position information:
a phi 6 steel ball is bonded in a central hole at the axial end of the mandrel by using viscous oil, and part of the steel ball is exposed out of the central hole; enabling the main shaft of the machine tool of the machining center to approach a vertical verification plane of the special checking fixture along the Z coordinate direction, determining the distance between the steel ball and the vertical verification plane, determining the Z coordinate position of the verification plane in the machine tool coordinate system, recording the Z coordinate display value in the current machine tool coordinate system, and archiving the X coordinate display value, the Y coordinate display value and the machine tool number which are obtained in the second step;
fourthly, machine tool zero point recovery and calibration of the machining center:
4.1) when the origin of the machine tool coordinate system is lost in the using process of the machining center, calculating the X coordinate display value and the Y coordinate display value of the current machine tool coordinate system on the machining center through the operation of the first step and the second step, and respectively recording the algebraic differences of the X coordinate value and the Y coordinate value in the archived data as X1 and Y1; calculating the Z coordinate value algebraic difference between the Z coordinate display value of the machine tool coordinate system and the Z coordinate value in the archived data as Z1 through the third operation;
4.2) enabling the machine tool to reach the zero point of the current coordinate;
bringing the machine tool to the (X1, Y1, Z1) position; and marking the machine tool zero point preset parameter as 1, and restarting the machine tool system to finish the machine tool zero point recovery.
Furthermore, in the first step, the three degrees of freedom between the checking fixture and the workbench are limited by the contact of the positioning bottom surface of the checking fixture body and the working table surface of the machine tool of the machining center, so that the Z coordinate position of the special checking fixture is determined; the cylindrical pin is contacted with the side wall of the T-shaped groove of the workbench, so that two degrees of freedom between the special detection tool and the workbench are limited, and the Y coordinate position of the special detection tool is determined; and finally, the last degree of freedom between the special checking fixture and the workbench is limited by the contact of the ball head screw and the side surface of the workbench, the X coordinate position of the special checking fixture is determined, and the unique position of the special checking fixture on the workbench of the machine tool is determined according to the process.
The invention has the following beneficial effects:
according to the invention, the check tool and the backup of the machine tool origin data are used, the voxel on the check tool is aligned through the dial indicator, and the factory setting of the machine tool origin can be quickly restored by matching with MDI operation. The method has the advantages of simple operation process, low tool and auxiliary tool cost and simple operation, and has the advantages of high X, Y coordinate recovery precision, simplicity and quickness in comparison with a method for recovering the original point of the machine tool by a machine tool manufacturer.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a special checking fixture of a machine zero point restoration and calibration device of a machining center in embodiment 1 of the present invention;
fig. 2 is a schematic view of another angle structure of the special inspection tool in embodiment 1 of the present invention;
FIG. 3 is a schematic sectional front view of the special inspection device in embodiment 1 of the present invention;
FIG. 4 is a left-side partial sectional view schematic diagram of the special inspection tool in embodiment 1 of the invention;
FIG. 5 is a top view of the special fixture in embodiment 1 of the present invention;
FIG. 6 is a bottom view of the special inspection device in embodiment 1 of the present invention;
fig. 7 is a schematic view of a machining center machine tool zero point restoration and calibration device according to embodiment 2 of the present invention applied to a vertical machining center machine tool;
fig. 8 is a schematic front view of a machining center machine tool zero point restoration and calibration device according to embodiment 2 of the present invention applied to a vertical machining center machine tool;
fig. 9 is a schematic top view of a machining center machine tool zero point restoration and calibration device according to embodiment 2 of the present invention applied to a vertical machining center machine tool;
fig. 10 is a left side view of a machining center machine tool zero point restoration and calibration device according to embodiment 2 of the present invention applied to a vertical machining center machine tool;
fig. 11 is a schematic partial enlarged view of a machining center machine tool zero point restoration and calibration device according to embodiment 2 of the present invention applied to a vertical machining center machine tool;
fig. 12 is a schematic view of a zero point recovery and calibration device for a machining center machine tool according to embodiment 3 of the present invention applied to a horizontal machining center machine tool;
fig. 13 is a schematic front view of a machining center machine tool zero point restoration and calibration device according to embodiment 3 of the present invention applied to a horizontal machining center machine tool;
fig. 14 is a schematic top view illustrating a zero point recovery and calibration device for a machining center machine tool according to embodiment 3 of the present invention applied to a horizontal machining center machine tool;
in the figure:
1-machine tool spindle; 2-mandrel; 3-a magnetic gauge stand; 4-percent header; 5-special checking fixture;
11-a gauge body; 12-ball head screw; 13-a nut; 14-cylindrical pins; 15-horizontal validation plane; 16-vertical position marking hole; 17-vertical verification plane; 18-horizontal position marking hole; 19-positioning the bottom surface.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example 1
The utility model provides a machining center lathe is zero point and is resumeed and calibrating device, includes that special use is examined 5, dabber 2, magnetic force gauge stand 3, percentage gauge outfit 4, and special use is examined 5 and is installed in any angular point position of machining center lathe workstation, and dabber 2 is installed on the main shaft of machining center lathe, and magnetic force gauge stand 3 is installed on dabber 2, and percentage gauge outfit 4 is installed on magnetic force gauge stand 3.
As shown in fig. 2 to 6, the special gauge 5 comprises a gauge body 11, four bosses are arranged at the bottom of the gauge body 11, and the bottom surfaces of the bosses are flush with each other to form a positioning bottom surface 19; the bottom of the checking fixture body 11 is also provided with two cylindrical pins 14; a flange extends from the side surface of the checking fixture body 11 to the bottom surface, a threaded hole is formed in the flange, and a ball head screw 12 is installed on the flange through the threaded hole and fixed through a nut 13; the special checking fixture 5 and a machine tool workbench of a machining center are positioned through the positioning bottom surface 19, the cylindrical pin 14 and the ball head screw 12; a vertical verification plane 17 is arranged on one side wall of the detection tool body 11, and a horizontal verification plane is arranged on the top surface of the detection tool body 11; the checking fixture body 11 is provided with a vertical position marking hole 16 in a penetrating manner along the vertical direction, the checking fixture body 11 is provided with a horizontal position marking hole 18 along the horizontal direction, and the horizontal position marking hole 18 is communicated with the vertical position marking hole 16.
The dial indicator head 4 is used for contacting the inner side hole wall of the vertical position marking hole 16 or the horizontal position marking hole 18 of the special checking fixture 4.
And a phi 6 steel ball is bonded in a central hole at the axial end part of the mandrel 2 by using viscous oil.
The positioning bottom surface 19 of the special checking fixture 5 is in contact with the working table surface of the machine tool of the machining center, and three degrees of freedom between the special checking fixture and the working table are limited so as to determine the Z coordinate position of the special checking fixture.
Two cylindrical pins 14 of the special checking fixture 5 are in contact with the side wall of a T-shaped groove of a machine tool workbench of the machining center, so that two degrees of freedom between the special checking fixture and the workbench are limited, and the Y coordinate position of the special checking fixture is determined.
The ball screw 12 of the special checking fixture 5 is in contact with the side surface of the machine tool workbench of the machining center, the last degree of freedom between the special checking fixture and the workbench is limited, and the X coordinate position of the special checking fixture is determined.
Example 2
A use method of a zero point recovery and calibration device of a machining center machine tool comprises the following steps:
step one, placing a special checking fixture:
as shown in fig. 7 to 11, after acceptance of a new machining center machine tool, the special gauge is placed on a workbench of the machining center machine tool, and three degrees of freedom between the gauge and the workbench are limited by contacting a boss on the bottom surface of the gauge body with the workbench surface of the machining center machine tool, so as to determine the Z coordinate position of the special gauge; two cylindrical pins are contacted with the side wall of the T-shaped groove of the workbench, so that two degrees of freedom between the special checking fixture and the workbench are limited, and the Y coordinate position of the special checking fixture is determined; and finally, the ball head screw is contacted with the side surface of the workbench, the last degree of freedom between the special checking fixture and the workbench is limited, the X coordinate position of the special checking fixture is determined, and the unique position of the checking fixture on the workbench of the machine tool is determined according to the method.
Step two, detecting the original X value and the original Y value of a machine tool coordinate system:
installing a mandrel on a main shaft of a machine tool of a vertical machining center, and installing a magnetic gauge stand on the mandrel; manually operating the machine tool to enable the dial indicator head to enter the vertical position marking hole of the special checking fixture and contact the hole wall, and aligning the axis of the vertical position marking hole to coincide with the axis of the main shaft of the machine tool; and recording the display values of the X coordinate and the Y coordinate in the current machine tool coordinate system (the point set by the machine tool when the machine tool leaves the factory and used as the unique position reference of the machine tool) and the corresponding machine tool number so as to be used when the zero point of the machine tool is restored in the future.
Step three, detecting an original Z value of a machine tool coordinate system, and recording machine tool coordinate position information:
a phi 6 steel ball is bonded in a central hole at the axial end of the mandrel by using viscous oil, and part of the steel ball is exposed out of the central hole; manually operating the machine tool to enable the main shaft of the machine tool of the machining center to approach to a horizontal verification plane of the special checking fixture along the Z coordinate direction, determining the distance between the steel ball and the horizontal verification plane through a plug gauge, determining the Z coordinate position of the horizontal verification plane in a machine tool coordinate system, recording the Z coordinate display value in the current machine tool coordinate system, and archiving the X coordinate position, the Y coordinate position and the machine tool number obtained in the second step;
fourthly, machine tool zero point recovery and calibration of the machining center:
when the original point of the machine tool coordinate system is lost in the use process of the machining center, calculating the X coordinate display value and the Y coordinate display value of the current machine tool coordinate system on the machining center by means of a special checking tool, a mandrel, a magnetic gauge stand and a dial indicator through the operations of the first step and the second step, and respectively recording the algebraic differences of the X coordinate value and the Y coordinate value in the archived data as X1 and Y1; calculating the Z coordinate value algebraic difference between the Z coordinate display value of the machine tool coordinate system and the Z coordinate value in the archived data as Z1 through the third operation;
manually operating the machine tool or operating G53G00X0Y0Z0 in an MDI (diphenylmethane diisocyanate) state to enable the machine tool to reach the zero point of the current coordinate;
programming or manually operating the machine tool to the (X1, Y1, Z1) position using incremental coordinates, namely the zero point position of the machine tool when the machine tool leaves the factory; and marking the machine tool zero point preset parameter as 1, and restarting the machine tool system to finish the machine tool zero point recovery.
Step five, precision detection:
the horizontal verification plane and the vertical verification plane around the special checking fixture are used, vertical and parallel precision detection between the XYZ axes of the machine tool can be carried out through the dial indicator, the precision can reach 0.015/200mm, the geometrical error defect of the machine tool can be found, and the effect that the precision recovery is influenced by the error of the detection result is avoided.
Example 3
A use method of a zero point recovery and calibration device of a machining center machine tool comprises the following steps:
step one, placing a special checking fixture:
as shown in fig. 12 to 14, after acceptance of a new machining center machine tool, the special gauge is placed on a workbench of the machining center machine tool, and three degrees of freedom between the gauge and the workbench are limited by contacting a boss on the bottom surface of the gauge body with the workbench surface of the machining center machine tool, so as to determine the Z coordinate position of the special gauge; two cylindrical pins are contacted with the side wall of the T-shaped groove of the workbench, so that two degrees of freedom between the special checking fixture and the workbench are limited, and the Y coordinate position of the special checking fixture is determined; and finally, the ball head screw is contacted with the side surface of the workbench, the last degree of freedom between the special checking fixture and the workbench is limited, the X coordinate position of the special checking fixture is determined, and the unique position of the checking fixture on the workbench of the machine tool is determined according to the method.
Step two, detecting the original X value and the original Y value of a machine tool coordinate system:
installing a mandrel on a main shaft of a machine tool of a horizontal machining center, and installing a magnetic gauge stand on the mandrel; manually operating the machine tool to enable the dial indicator head to enter the vertical position marking hole of the special checking fixture and contact the hole wall, and aligning the axis of the vertical position marking hole to coincide with the axis of the main shaft of the machine tool; and recording the display values of the X coordinate and the Y coordinate in the current machine tool coordinate system (the point set by the machine tool when the machine tool leaves the factory and used as the unique position reference of the machine tool) and the corresponding machine tool number so as to be used when the zero point of the machine tool is restored in the future.
Step three, detecting an original Z value of a machine tool coordinate system, and recording machine tool coordinate position information:
a phi 6 steel ball is bonded in a central hole at the axial end of the mandrel by using viscous oil, and part of the steel ball is exposed out of the central hole; manually operating the machine tool to enable the main shaft of the machine tool of the machining center to approach to a vertical verification plane of the special checking fixture along the Z coordinate direction, determining the distance between the steel ball and the vertical verification plane through a plug gauge, determining the Z coordinate position of the vertical verification plane in a machine tool coordinate system, recording the Z coordinate display value in the current machine tool coordinate system, and archiving the X coordinate position, the Y coordinate position and the machine tool number obtained in the second step;
fourthly, machine tool zero point recovery and calibration of the machining center:
when the original point of the machine tool coordinate system is lost in the use process of the machining center, calculating the X coordinate display value and the Y coordinate display value of the current machine tool coordinate system on the machining center by means of a special checking tool, a mandrel, a magnetic gauge stand and a dial indicator through the operations of the first step and the second step, and respectively recording the algebraic differences of the X coordinate value and the Y coordinate value in the archived data as X1 and Y1; calculating the Z coordinate value algebraic difference between the Z coordinate display value of the machine tool coordinate system and the Z coordinate value in the archived data as Z1 through the third operation;
manually operating the machine tool or operating G53G00X0Y0Z0 in an MDI (diphenylmethane diisocyanate) state to enable the machine tool to reach the zero point of the current coordinate;
programming or manually operating the machine tool to the (X1, Y1, Z1) position using incremental coordinates, namely the zero point position of the machine tool when the machine tool leaves the factory; and marking the machine tool zero point preset parameter as 1, and restarting the machine tool system to finish the machine tool zero point recovery.
Step five, precision detection:
the horizontal verification plane and the vertical verification plane around the special checking fixture are used, vertical and parallel precision detection between the XYZ axes of the machine tool can be carried out through the dial indicator, the precision can reach 0.015/200mm, the geometrical error defect of the machine tool can be found, and the effect that the precision recovery is influenced by the error of the detection result is avoided.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A zero point recovery and calibration device for a machine tool of a machining center is characterized by comprising a special checking fixture (5), a mandrel (2), a magnetic gauge stand (3) and a dial gauge head (4); the special checking fixture (5) is arranged at any angular point of a machining center machine tool workbench, the mandrel (2) is arranged on a main shaft of the machining center machine tool, the magnetic gauge stand (3) is arranged on the mandrel (2), and the dial gauge head (4) is arranged on the magnetic gauge stand (3); the special detection tool (5) comprises a detection tool body (11), a positioning bottom surface (19) and a cylindrical pin (14) are arranged at the bottom of the detection tool body (11), a ball head screw (12) is mounted at the bottom of the side surface of the detection tool body (11), and the special detection tool (5) is positioned on a machine tool workbench of a machining center through the positioning bottom surface (19), the cylindrical pin (14) and the ball head screw (12); the checking fixture comprises a checking fixture body (11), wherein a vertical position mark hole (16) is formed in the checking fixture body (11) in a penetrating mode in the vertical direction, a horizontal position mark hole (18) is formed in the checking fixture body (11) in the horizontal direction, and the horizontal position mark hole (18) is communicated with the vertical position mark hole (16).
2. The zero point restoration and calibration device for the machining center machine tool as claimed in claim 1, wherein the bottom of the checking fixture body (11) is provided with four bosses, and the bottom surfaces of the bosses are flush with each other to form a positioning bottom surface (19).
3. The zero point restoration and calibration device for the machining center machine tool as claimed in claim 1, wherein a flange extends from the side surface of the inspection tool body (11) to the bottom surface, the flange is provided with a threaded hole, and a ball screw (12) is mounted on the flange through the threaded hole and fixed through a nut (13).
4. The zero point restoration and calibration device for the machine tool of the machining center is characterized in that one side wall of the check tool body (11) is provided with a vertical verification plane (17), and the top surface of the check tool body (11) is provided with a horizontal verification plane (15).
5. The zero point restoration and calibration device for the machining center machine tool as claimed in claim 1, wherein a phi 6 steel ball is bonded in a central hole of an axial end of the mandrel (2) by using viscous oil.
6. The zero point restoration and calibration device for the machine tool of the machining center is characterized in that the dial indicator head (4) is used for being in contact with the inner side hole wall of the vertical position marking hole (16) or the horizontal position marking hole (18) of the special checking fixture 4.
7. The zero point restoration and calibration device for the machine tool of the machining center is characterized in that the positioning bottom surface (19) of the special checking fixture (5) is in contact with the working table surface of the machine tool of the machining center, so that three degrees of freedom between the special checking fixture and the working table are limited; two cylindrical pins (14) of the special checking fixture (5) are in contact with the side wall of a T-shaped groove of a machine tool workbench of a machining center, so that two degrees of freedom between the special checking fixture and the workbench are limited; and a ball head screw (12) of the special checking fixture (5) is in contact with the side surface of a machine tool workbench of the machining center, so that the last degree of freedom between the special checking fixture and the workbench is limited.
8. The use method of the zero point restoration and calibration device for the machining center machine tool according to claim 4, characterized by comprising the following steps:
step one, placing a special checking fixture:
after the machine tool of the new vertical machining center is checked and accepted, the special checking fixture is placed at any angular point position on the worktable of the machining center, the special checking fixture is positioned with the worktable of the machining center through the positioning bottom surface, the cylindrical pin and the ball head screw, and the only position of the checking fixture on the worktable of the machine tool is determined;
step two, detecting the original X value and the original Y value of a machine tool coordinate system:
installing a mandrel on a main shaft of a machine tool of a machining center, and installing a magnetic gauge stand on the mandrel; enabling the dial indicator head to enter a vertical position marking hole of the special checking fixture and contact with the hole wall, and aligning the axis of the vertical position marking hole to coincide with the axis of the machine tool spindle; recording an X coordinate display value, a Y coordinate display value and a corresponding machine tool number in a current machine tool coordinate system;
step three, detecting an original Z value of a machine tool coordinate system, and recording machine tool coordinate position information:
a phi 6 steel ball is bonded in a central hole at the axial end of the mandrel by using viscous oil, and part of the steel ball is exposed out of the central hole; enabling the main shaft of the machine tool of the machining center to approach a horizontal verification plane of the special checking fixture along the Z coordinate direction, determining the distance between the steel ball and the horizontal verification plane, determining the Z coordinate position of the horizontal verification plane in the machine tool coordinate system, recording the Z coordinate display value in the current machine tool coordinate system, and archiving the X coordinate display value, the Y coordinate display value and the machine tool number which are obtained in the second step;
fourthly, machine tool zero point recovery and calibration of the machining center:
4.1) when the origin of the machine tool coordinate system is lost in the using process of the machining center, calculating the X coordinate display value and the Y coordinate display value of the current machine tool coordinate system on the machining center through the operation of the first step and the second step, and respectively recording the algebraic differences of the X coordinate value and the Y coordinate value in the archived data as X1 and Y1; calculating the Z coordinate value algebraic difference between the Z coordinate display value of the machine tool coordinate system and the Z coordinate value in the archived data as Z1 through the third operation;
4.2) enabling the machine tool to reach the zero point of the current coordinate;
bringing the machine tool to the (X1, Y1, Z1) position; and marking the machine tool zero point preset parameter as 1, and restarting the machine tool system to finish the machine tool zero point recovery.
9. The use method of the zero point restoration and calibration device for the machining center machine tool according to claim 4, characterized by comprising the following steps:
step one, placing a special checking fixture:
after the machine tool of the new horizontal machining center is checked and accepted, the special checking fixture is placed at any angular point position on the machine tool workbench of the machining center, the special checking fixture is positioned with the machine tool workbench of the machining center through the positioning bottom surface, the cylindrical pin and the ball head screw, and the only position of the checking fixture on the machine tool workbench is determined;
step two, detecting the original X value and the original Y value of a machine tool coordinate system:
installing a mandrel on a main shaft of a machine tool of a machining center, and installing a magnetic gauge stand on the mandrel; enabling the dial indicator head to enter a horizontal position mark hole of the special checking fixture and contact the hole wall, and aligning the axis of the horizontal position mark hole to coincide with the axis of the machine tool spindle; recording an X coordinate display value, a Y coordinate display value and a corresponding machine tool number in a current machine tool coordinate system;
step three, detecting an original Z value of a machine tool coordinate system, and recording machine tool coordinate position information:
a phi 6 steel ball is bonded in a central hole at the axial end of the mandrel by using viscous oil, and part of the steel ball is exposed out of the central hole; enabling the main shaft of the machine tool of the machining center to approach a vertical verification plane of the special checking fixture along the Z coordinate direction, determining the distance between the steel ball and the vertical verification plane, determining the Z coordinate position of the verification plane in the machine tool coordinate system, recording the Z coordinate display value in the current machine tool coordinate system, and archiving the X coordinate display value, the Y coordinate display value and the machine tool number which are obtained in the second step;
fourthly, machine tool zero point recovery and calibration of the machining center:
4.1) when the origin of the machine tool coordinate system is lost in the using process of the machining center, calculating the X coordinate display value and the Y coordinate display value of the current machine tool coordinate system on the machining center through the operation of the first step and the second step, and respectively recording the algebraic differences of the X coordinate value and the Y coordinate value in the archived data as X1 and Y1; calculating the Z coordinate value algebraic difference between the Z coordinate display value of the machine tool coordinate system and the Z coordinate value in the archived data as Z1 through the third operation;
4.2) enabling the machine tool to reach the zero point of the current coordinate;
bringing the machine tool to the (X1, Y1, Z1) position; and marking the machine tool zero point preset parameter as 1, and restarting the machine tool system to finish the machine tool zero point recovery.
10. The use method of the zero point restoration and calibration device for the machine tool of the machining center is characterized in that in the first step, three degrees of freedom between the checking fixture and the workbench are limited by the contact of the positioning bottom surface of the checking fixture body and the workbench surface of the machine tool of the machining center, so that the Z coordinate position of the special checking fixture is determined; the cylindrical pin is contacted with the side wall of the T-shaped groove of the workbench, so that two degrees of freedom between the special detection tool and the workbench are limited, and the Y coordinate position of the special detection tool is determined; and finally, the last degree of freedom between the special checking fixture and the workbench is limited by the contact of the ball head screw and the side surface of the workbench, the X coordinate position of the special checking fixture is determined, and the unique position of the special checking fixture on the workbench of the machine tool is determined according to the process.
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