CN114161223A - Device and method for correcting orthogonal error of horizontal machining central axis - Google Patents
Device and method for correcting orthogonal error of horizontal machining central axis Download PDFInfo
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- CN114161223A CN114161223A CN202111487953.1A CN202111487953A CN114161223A CN 114161223 A CN114161223 A CN 114161223A CN 202111487953 A CN202111487953 A CN 202111487953A CN 114161223 A CN114161223 A CN 114161223A
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- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
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Abstract
The invention provides a device and a method for correcting orthogonal errors of a horizontal machining central axis, belonging to the field of machining and comprising a main shaft core rod, a main shaft core rod and a main shaft component, wherein the main shaft core rod is fixedly connected with a main shaft in the main shaft component and leads out the axis of the main shaft; the spindle assembly can move along the X direction and the Y direction, so that the spindle core rod follows up; a turntable; the central axis of the rotary table is collinear with the axis B, and the axis B is orthogonal to the central axis of the main shaft on a YZ projection plane; the bracket assembly is vertically fixed on the upper end surface of the rotary table; a lever meter is arranged at the top of the bracket assembly; the position of the maximum normal tangent point of the main shaft core rod side bus is in contact with the lever indicator, and orthogonal error correction is realized through the difference value of the time indication values of the lever indicator at the 0-degree position and the 180-degree position respectively; by utilizing the device provided by the scheme, the orthogonal error between the axis of the main shaft and the axis of the rotary table (namely the axis B) can be corrected, and the orthogonal precision of the two axes is further improved.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to a device and a method for correcting a turning and boring rotation axis orthogonal error of a horizontal machining center.
Background
In the machining of bearing holes at two ends of typical box bodies, shells, ring frames and support parts, a horizontal B-axis rotary worktable is usually adopted to perform hole turning and boring for one group, and the technological mode of ensuring the coaxiality and the end face run-out of holes at two positions of 0-degree and 180-degree is ensured. Because the B-axis rotary table rotates 180 degrees, the initial orthogonal error of the B-axis and the axis of the main shaft directly influences the mutual position relationship between the hole of the bored part which rotates 180 degrees and the hole at the position of 0 degree, and the phenomenon that the positions of two holes have large deviation is easy to occur.
The orthogonality of the two axes should be always located at the fixed mechanical zero position on the X axis theoretically, but because of the parallelism error of the main shaft axis and the Z axis, the included angle of the B axis causes the radial run-out error at different height positions, and when the main shaft rotates, the radial run-out error of the actual working position of the far end causes the position of the two axes orthorhombic to the X axis to have deviation.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device and a specific method for correcting the orthogonal error of the rotary axis, which can be used for accurately calibrating the orthogonal error of the two axes before boring the high-precision hole system and preventing the error from being amplified twice and influencing the position precision between two holes at 0-degree and 180-degree positions.
The specific scheme provided by the invention is as follows:
a device for correcting the orthogonal error of a horizontal machining central axis comprises
The spindle core rod is used for being fixedly connected with a spindle in the spindle assembly and leading out the axis of the spindle; the spindle assembly can move along the X direction and the Y direction, so that the spindle core rod follows up;
a turntable; the central axis of the rotary table is collinear with the axis B, and the axis B is orthogonal to the central axis of the main shaft on a YZ projection plane; and
the bracket assembly is vertically fixed on the upper end surface of the rotary table; a lever meter is arranged at the top of the bracket assembly; the position of the maximum normal tangent point of the main shaft core rod side bus is in contact with the lever indicator, and orthogonal error correction is realized through the difference of the indication values of the lever indicator at the positions of 0 degree and 180 degrees respectively.
Furthermore, the run-out precision of the main shaft core rod per 300mm length is less than 2 microns, the roundness is less than 1 micron, the cylindricity is less than 3 microns, and the surface roughness Ra is less than 0.1 micron.
Further, the bracket assembly comprises a magnetic base and a vertical rod; the magnetic seat is fixed on the rotary table in a magnetic attraction manner; the vertical rod is a telescopic rod and is fixedly connected to the magnetic seat; the lever meter is fixedly connected with the telescopic rod through a meter rod.
Further, the resolution of the lever meter is 2 μm, and the lever meter can be adjusted at different angles relative to the meter bar.
The method for correcting the orthogonal error of the horizontal machining central axis comprises the following steps of:
s1, fixedly mounting a spindle core rod on a spindle; then manually adjusting the machine tool to enable the spindle assembly to move along the XY direction until the central axis of the spindle is roughly intersected with the axis B;
s2, assembling the lever meter, the meter rod, the vertical rod and the magnetic seat, magnetically attracting the magnetic seat on a rotary table, and prepressing the main shaft core rod by the lever meter;
s3, manually adjusting the machine tool to enable the spindle assembly to move along the Y direction; simultaneously, the vertical rod is telescopically adjusted in the Y direction, so that the maximum normal tangent position of a bus at the side of the main shaft core rod is in contact with the lever meter, and the numerical value on the lever meter is adjusted to be pre-pressed to be 0.05-0.1 mm;
s4, controlling the main shaft to rotate so that the main shaft core rod synchronously rotates at a low speed; at the moment, the numerical value on the lever indicator jumps in the rotating process of the spindle core rod, the position of the spindle core rod A corresponding to the maximum numerical value displayed by the lever indicator is found, and the lever indicator is set to zero at the moment;
s5, manually adjusting the machine tool to enable the spindle assembly to retreat to the farthest end along the Z direction, enabling the spindle core rod not to be in contact with the lever indicator any more, and controlling the spindle to rotate for 180 degrees;
s6, the rotary table rotates around the axis B, so that the lever indicator on the rotary table synchronously rotates, and the rotating angle is 180 degrees;
s7, manually adjusting the machine tool to enable the spindle assembly to advance along the Z direction, enabling the lever indicator to be in contact with the spindle core rod again, and stopping advancing until the contact position reaches the position A of the spindle core rod; recording the numerical value of the lever meter at the moment;
s8, manually adjusting the machine tool to enable the spindle assembly to move along the X direction, so that the numerical value displayed by the lever indicator is 1/2 displayed by the numerical value of the lever indicator in the S7;
s9, repeating the steps S5-S8 for multiple times until the intersection error is less than 3 mu m;
and S10, recording the position coordinate of the main shaft assembly at the moment, comparing the position coordinate with the zero point of the machine tool for confirmation, taking the X-axis data of the main shaft assembly at the moment as basic error data for reverse compensation after the rotary table rotates 180 degrees, and recording the data into the machine tool.
The beneficial effect that adopts this technical scheme to reach does:
by utilizing the device provided by the scheme, the orthogonal error between the axis of the main shaft and the axis of the rotary table (namely the axis B) can be corrected, and the orthogonal precision of the two axes is further improved. The position precision between two holes at 0-degree and 180-degree positions can be effectively improved when the 180-degree turning processing is carried out on a typical large-span and short-axis hollow shell hole/shaft workpiece.
Drawings
FIG. 1 is a schematic view showing the assembly and operation of the components of the apparatus of the present invention.
Wherein: 10 main shaft core rods, 20 main shafts, 30 rotary tables, 40 support assemblies, 41 magnetic bases, 42 vertical rods, 51 lever meters, 52 meter rods and 100 main shaft assemblies.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The embodiment provides an orthogonal error correction device for a horizontal machining central axis, which is mainly applied to a horizontal machining central machine tool and is used for realizing the orthogonal precision between the main shaft axis and the B axis of the machine tool.
Referring to fig. 1, the apparatus provided by the present disclosure specifically includes a spindle core rod 10 for fixedly connecting with a spindle 20 in a spindle assembly 100; the spindle assembly 100 is an assembly mounted on a machine tool (not shown), and the spindle assembly 100 can be controlled to move in the X direction and the Y direction by regulating the machine tool, because the spindle core rod 10 is fixed on the spindle 20, the movement of the spindle assembly 100 will make the spindle core rod 10 follow up; a rotary table 30 is also arranged on the machine tool; the central axis of the turntable 30 is collinear with the axis B, which can be simply understood as the axis B is also the central axis of the turntable 30; the B axis is orthogonal to the central axis of the main shaft 20 on the projection plane.
The orthogonality is actually theoretical orthogonality, and in an actual scene, due to the influence of processing errors and various run-out errors, the axis B and the central axis of the spindle 20 cannot be completely orthogonal on a projection plane, so that the scheme is based on the problem that the orthogonality of the axis B and the central axis of the spindle 20 is corrected, the error between the two axes is reduced as much as possible, and the processing precision of the part to be processed is ensured.
In the scheme, a support assembly 40 is vertically arranged on the upper end surface of the rotary table 30, and a lever indicator 51 is arranged at the top of the support assembly 40; the lever meter 51 is in contact with the outer surface of the spindle core rod 10 at different positions to achieve quadrature error correction.
It can be understood that the present solution realizes the correction of the quadrature error of the two axes by utilizing the reasonable use of the lever indicator 51 and the spindle core rod 10.
In the present embodiment, the spindle core 10 drawn out as the spindle axis has a higher requirement for machining accuracy, i.e., it is ensured that the runout accuracy per 300mm length is less than 2 μm, the roundness per 300mm length is less than 1 μm, the cylindricity per 300mm length is less than 3 μm, and the surface roughness Ra per 300mm length is less than 0.1 μm.
In this embodiment, the bracket assembly 40 includes a magnetic base 41 and a vertical rod 42; the magnetic base 41 is fixed on the rotary table 30 by magnetic attraction; the vertical rod 42 is a telescopic rod and is fixedly connected to the magnetic base 41; the lever meter 51 is fixedly connected with the telescopic rod through a meter rod 52; the vertical rod 42 is provided with a telescopic structure, so that the height of the lever meter 51 can be adjusted, and the lever meter can be accurately in contact with the spindle core rod 10 for correction in a subsequent correction scheme.
Alternatively, the resolution of the lever gauge 51 is 2 μm, and the lever gauge 51 is adjustable at different angles with respect to the gauge rod 52 to ensure effective contact with the spindle core rod 10.
The specific method for correcting by adopting the correcting device comprises the following steps:
s1, fixedly mounting a main shaft core rod 10 on a main shaft 20; the machine tool (not shown) is then manually adjusted so that the spindle assembly 100 moves in the XY direction until the central axis of the spindle 20 roughly intersects the B axis.
Of course, the coarse intersections are theoretically orthogonal, and further correction is necessary to eliminate the influence of various errors as much as possible.
S2, assembling the lever meter 51, the meter rod 52, the vertical rod 42 and the magnetic seat 41, magnetically attracting the magnetic seat 41 to the rotary table 30, and pre-pressing the lever meter 51 on the spindle core rod 10.
S3, manually adjusting the machine tool to enable the spindle assembly 100 to move along the Y direction; meanwhile, the vertical rod 42 is telescopically adjusted in the Y direction, so that the maximum normal tangent position of a bus at the side of the main shaft core rod 10 is in contact with the lever indicator 51, and the numerical value on the lever indicator 51 is adjusted to be pre-pressed to be between 0.05 and 0.1 mm;
the maximum normal tangent position of the side generatrix is understood here to mean the side generatrix on the spindle core rod which is furthest away from its central axis.
S4, controlling the main shaft 20 to rotate so that the main shaft core rod 10 synchronously rotates at a low speed; at this time, the numerical value on the lever indicator 51 jumps during the rotation process of the spindle core rod 10, the position of the spindle core rod a corresponding to the numerical value displayed by the lever indicator 51 when the numerical value is the maximum value is found, and the lever indicator 51 is set to zero at this time;
it is understood that the lever gauge 51 performs the numerical value clearing process at the maximum error position on the spindle core rod 10 at this time, and the maximum error position on the spindle core rod 10 here is defined as a.
S5, manually adjusting the machine tool to enable the spindle assembly 100 to retreat to the farthest end along the Z direction, enabling the spindle core rod 10 not to contact with the lever indicator 51 any more, and controlling the spindle 20 to rotate for 180 degrees;
the main purpose of the spindle assembly 100 moving back in the Z direction is to provide a space for the rotation of the turntable 30, and in particular, to enable the lever indicator 51, the indicator rod 52 and the vertical rod 42 disposed on the turntable 30 to rotate smoothly, so as to avoid the interference effect caused by the presence of the spindle core rod 10.
S6, the rotary table 30 rotates around the axis B, so that the lever indicator 51 on the rotary table synchronously rotates at an angle of 180 degrees; it will be understood that the lever meter 51 is rotated from the 0 position to the opposite 180 position.
S7, manually adjusting the machine tool to enable the spindle assembly 100 to advance along the Z direction, enabling the lever indicator 51 to be contacted with the spindle core rod 10 again, and stopping advancing until the contacted position reaches the position A of the spindle core rod; recording the numerical value of the lever meter at the moment;
that is, when the lever indicator is at the 0 ° position and contacts the position a of the spindle core rod 10, the lever indicator 51 is subjected to the numerical value zero clearing process (see step S4 specifically); then, after the lever indicator 51 rotates 180 °, and the spindle core 10 also rotates 180 °, the lever indicator 51 again contacts the position a of the spindle core 10, and the value at this time needs to be recorded.
S8, manually adjusting the machine tool to enable the spindle assembly 100 to move along the X direction, so that the numerical value displayed by the lever indicator 51 is 1/2 displayed by the numerical value of the lever indicator 51 in the S7;
s9, repeating the steps S5-S8 for multiple times until the intersection error is less than 3 mu m;
and S10, recording the position coordinate of the main shaft assembly at the moment, comparing the position coordinate with the zero point of the machine tool for confirmation, taking the X-axis data of the main shaft assembly at the moment as basic error data for reverse compensation after the rotary table rotates 180 degrees, and recording the data into the machine tool.
By adopting the steps, the orthogonal error of the two axes (the axis B and the main axis) is gradually close to zero in multiple corrections, the purpose of improving the orthogonal precision is achieved, and the boring of the high-precision hole system is ensured.
The device provided by the scheme is used for correcting the axis of the main shaft and the axis of the rotary table (namely the axis B), so that the orthogonal precision of the two axes is further improved, and the position precision between two holes at 0-degree and 180-degree positions can be effectively ensured when a workpiece is subjected to rotary machining, particularly before high-precision hole boring is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A horizontal processing central axis orthogonal error correction device is characterized by comprising
The main shaft core rod (10) is fixedly connected with a main shaft (20) in the main shaft assembly (100) and leads out the axis of the main shaft; the spindle assembly (100) can move along the X direction and the Y direction, so that the spindle core rod (10) follows;
a rotary table (30); the central axis of the rotary table (30) is collinear with the B axis, and the B axis is orthogonal to the central axis of the main shaft (20) on a YZ projection plane; and
the bracket assembly (40) is vertically fixed on the upper end surface of the rotary table (30); a lever meter (51) is arranged at the top of the bracket assembly (40); the position of the maximum normal tangent point of the main shaft core rod side bus is in contact with the lever indicator (51), and orthogonal error correction is realized through the difference of the indicating values of the lever indicator (51) at the positions of 0 degree and 180 degrees respectively.
2. The orthogonal error correction device for the horizontal machining central axis according to claim 1, characterized in that the runout precision of the spindle core rod (10) per 300mm length is less than 2 μm, the roundness is less than 1 μm, the cylindricity is less than 3 μm, and the surface roughness Ra is less than 0.1 μm.
3. The orthogonal error correction device for horizontal machining center axes of claim 1, characterized in that the bracket assembly (40) comprises a magnetic seat (41) and a vertical rod (42); the magnetic seat (41) is fixed on the rotary table (30) in a magnetic attraction way; the vertical rod (42) is a telescopic rod and is fixedly connected to the magnetic seat (41); the lever meter (51) is fixedly connected with the telescopic rod through a meter rod (52).
4. The device for correcting the orthogonal error of the central axis of horizontal machining according to claim 3, wherein the resolution of the lever indicator (51) is 2 μm, and the lever indicator (51) can be adjusted at different angles relative to the gauge rod (52).
5. A method for correcting the orthogonal error of a horizontal machining central axis, which is characterized by using the correcting device of claim 4 to correct the orthogonal error, and comprises the following steps:
s1, fixedly mounting a main shaft core rod (10) on a main shaft (20); then manually adjusting the machine tool to enable the spindle assembly (100) to move along the X direction until the central axis of the spindle (20) is roughly intersected with the axis B;
s2, assembling a lever meter (51), a meter rod (52), a vertical rod (42) and a magnetic seat (41), magnetically attracting the magnetic seat (41) on a rotary table (30), and pre-pressing the lever meter (51) on the spindle core rod (10);
s3, manually adjusting the machine tool to enable the spindle assembly (100) to move along the Y direction; meanwhile, the vertical rod (42) is telescopically adjusted in the Y direction, so that the maximum normal tangent position of a side bus of the main shaft core rod (10) is in contact with the lever meter (51), and the numerical value on the lever meter (51) is adjusted to be pre-pressed to be between 0.05 and 0.1 mm;
s4, controlling the main shaft (20) to rotate so that the main shaft core rod (10) synchronously rotates at a low speed; at the moment, the numerical value on the lever indicator (51) jumps in the rotating process of the spindle core rod (10), the position of the spindle core rod (10) A corresponding to the maximum numerical value displayed by the lever indicator (51) is found, and the lever indicator (51) is set to zero at the moment;
s5, manually adjusting the machine tool to enable the spindle assembly (100) to retreat to the farthest end along the Z direction, enabling the spindle core rod (10) to be not in contact with the lever meter (51) any more, and controlling the spindle (20) to rotate for 180 degrees;
s6, the rotary table (30) rotates around the axis B, so that the lever indicator (51) positioned on the rotary table (30) synchronously rotates at an angle of 180 degrees;
s7, manually adjusting the machine tool to enable the spindle assembly (100) to advance along the Z direction, enabling the lever indicator (51) to be contacted with the spindle core rod (10) again, and stopping advancing until the contacted position reaches the position A of the spindle core rod (10); recording the numerical value of the lever meter (51) at the moment;
s8, manually adjusting the machine tool to enable the spindle assembly (100) to move along the X direction, so that the numerical value displayed by the lever indicator (51) is 1/2 of the numerical value display of the lever indicator (51) in S7;
s9, repeating the steps S5-S8 for multiple times until the intersection error is less than 3 mu m;
s10, recording the position coordinate of the spindle assembly (100), comparing the position coordinate with the zero point of the machine tool for confirmation, and recording X-axis data of the spindle assembly (100) as basic error data for reverse compensation after the rotary table (30) rotates by 180 degrees into the machine tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111487953.1A CN114161223A (en) | 2021-12-07 | 2021-12-07 | Device and method for correcting orthogonal error of horizontal machining central axis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111487953.1A CN114161223A (en) | 2021-12-07 | 2021-12-07 | Device and method for correcting orthogonal error of horizontal machining central axis |
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| CN114161223A true CN114161223A (en) | 2022-03-11 |
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| CN202111487953.1A Pending CN114161223A (en) | 2021-12-07 | 2021-12-07 | Device and method for correcting orthogonal error of horizontal machining central axis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115647932A (en) * | 2022-11-02 | 2023-01-31 | 湖北工业大学 | Method for controlling mounting precision of detachable milling head |
| CN117564782A (en) * | 2024-01-16 | 2024-02-20 | 四川普什宁江机床有限公司 | Processing method of high-precision coaxial hole system |
-
2021
- 2021-12-07 CN CN202111487953.1A patent/CN114161223A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115647932A (en) * | 2022-11-02 | 2023-01-31 | 湖北工业大学 | Method for controlling mounting precision of detachable milling head |
| CN115647932B (en) * | 2022-11-02 | 2023-07-18 | 湖北工业大学 | Detachable milling head installation precision control method |
| CN117564782A (en) * | 2024-01-16 | 2024-02-20 | 四川普什宁江机床有限公司 | Processing method of high-precision coaxial hole system |
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